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Message-ID: <2023082634-postnasal-anaconda-09f0@gregkh>
Date: Sat, 26 Aug 2023 16:05:34 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
torvalds@...ux-foundation.org, stable@...r.kernel.org
Cc: lwn@....net, jslaby@...e.cz,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: Linux 5.10.192
diff --git a/Documentation/admin-guide/hw-vuln/srso.rst b/Documentation/admin-guide/hw-vuln/srso.rst
index 2f923c805802..f79cb11b080f 100644
--- a/Documentation/admin-guide/hw-vuln/srso.rst
+++ b/Documentation/admin-guide/hw-vuln/srso.rst
@@ -124,8 +124,8 @@ sequence.
To ensure the safety of this mitigation, the kernel must ensure that the
safe return sequence is itself free from attacker interference. In Zen3
and Zen4, this is accomplished by creating a BTB alias between the
-untraining function srso_untrain_ret_alias() and the safe return
-function srso_safe_ret_alias() which results in evicting a potentially
+untraining function srso_alias_untrain_ret() and the safe return
+function srso_alias_safe_ret() which results in evicting a potentially
poisoned BTB entry and using that safe one for all function returns.
In older Zen1 and Zen2, this is accomplished using a reinterpretation
diff --git a/Documentation/devicetree/bindings/iio/addac/adi,ad74413r.yaml b/Documentation/devicetree/bindings/iio/addac/adi,ad74413r.yaml
new file mode 100644
index 000000000000..baa65a521bad
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/addac/adi,ad74413r.yaml
@@ -0,0 +1,158 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/addac/adi,ad74413r.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AD74412R/AD74413R device
+
+maintainers:
+ - Cosmin Tanislav <cosmin.tanislav@...log.com>
+
+description: |
+ The AD74412R and AD74413R are quad-channel software configurable input/output
+ solutions for building and process control applications. They contain
+ functionality for analog output, analog input, digital input, resistance
+ temperature detector, and thermocouple measurements integrated
+ into a single chip solution with an SPI interface.
+ The devices feature a 16-bit ADC and four configurable 13-bit DACs to provide
+ four configurable input/output channels and a suite of diagnostic functions.
+ The AD74413R differentiates itself from the AD74412R by being HART-compatible.
+ https://www.analog.com/en/products/ad74412r.html
+ https://www.analog.com/en/products/ad74413r.html
+
+properties:
+ compatible:
+ enum:
+ - adi,ad74412r
+ - adi,ad74413r
+
+ reg:
+ maxItems: 1
+
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ spi-max-frequency:
+ maximum: 1000000
+
+ spi-cpol: true
+
+ interrupts:
+ maxItems: 1
+
+ refin-supply: true
+
+ shunt-resistor-micro-ohms:
+ description:
+ Shunt (sense) resistor value in micro-Ohms.
+ default: 100000000
+
+required:
+ - compatible
+ - reg
+ - spi-max-frequency
+ - spi-cpol
+ - refin-supply
+
+additionalProperties: false
+
+patternProperties:
+ "^channel@[0-3]$":
+ type: object
+ description: Represents the external channels which are connected to the device.
+
+ properties:
+ reg:
+ description: |
+ The channel number. It can have up to 4 channels numbered from 0 to 3.
+ minimum: 0
+ maximum: 3
+
+ adi,ch-func:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ Channel function.
+ HART functions are not supported on AD74412R.
+ 0 - CH_FUNC_HIGH_IMPEDANCE
+ 1 - CH_FUNC_VOLTAGE_OUTPUT
+ 2 - CH_FUNC_CURRENT_OUTPUT
+ 3 - CH_FUNC_VOLTAGE_INPUT
+ 4 - CH_FUNC_CURRENT_INPUT_EXT_POWER
+ 5 - CH_FUNC_CURRENT_INPUT_LOOP_POWER
+ 6 - CH_FUNC_RESISTANCE_INPUT
+ 7 - CH_FUNC_DIGITAL_INPUT_LOGIC
+ 8 - CH_FUNC_DIGITAL_INPUT_LOOP_POWER
+ 9 - CH_FUNC_CURRENT_INPUT_EXT_POWER_HART
+ 10 - CH_FUNC_CURRENT_INPUT_LOOP_POWER_HART
+ minimum: 0
+ maximum: 10
+ default: 0
+
+ adi,gpo-comparator:
+ type: boolean
+ description: |
+ Whether to configure GPO as a comparator or not.
+ When not configured as a comparator, the GPO will be treated as an
+ output-only GPIO.
+
+ required:
+ - reg
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+ #include <dt-bindings/iio/addac/adi,ad74413r.h>
+
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cs-gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
+ status = "okay";
+
+ ad74413r@0 {
+ compatible = "adi,ad74413r";
+ reg = <0>;
+ spi-max-frequency = <1000000>;
+ spi-cpol;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ interrupt-parent = <&gpio>;
+ interrupts = <26 IRQ_TYPE_EDGE_FALLING>;
+
+ refin-supply = <&ad74413r_refin>;
+
+ channel@0 {
+ reg = <0>;
+
+ adi,ch-func = <CH_FUNC_VOLTAGE_OUTPUT>;
+ };
+
+ channel@1 {
+ reg = <1>;
+
+ adi,ch-func = <CH_FUNC_CURRENT_OUTPUT>;
+ };
+
+ channel@2 {
+ reg = <2>;
+
+ adi,ch-func = <CH_FUNC_DIGITAL_INPUT_LOGIC>;
+ adi,gpo-comparator;
+ };
+
+ channel@3 {
+ reg = <3>;
+
+ adi,ch-func = <CH_FUNC_CURRENT_INPUT_EXT_POWER>;
+ };
+ };
+ };
+...
diff --git a/Makefile b/Makefile
index ecf9ab05e13a..316598ce1b12 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
VERSION = 5
PATCHLEVEL = 10
-SUBLEVEL = 191
+SUBLEVEL = 192
EXTRAVERSION =
NAME = Dare mighty things
diff --git a/arch/arm/boot/dts/imx6dl-prtrvt.dts b/arch/arm/boot/dts/imx6dl-prtrvt.dts
index 5ac84445e9cc..90e01de8c2c1 100644
--- a/arch/arm/boot/dts/imx6dl-prtrvt.dts
+++ b/arch/arm/boot/dts/imx6dl-prtrvt.dts
@@ -126,6 +126,10 @@ &usbh1 {
status = "disabled";
};
+&usbotg {
+ disable-over-current;
+};
+
&vpu {
status = "disabled";
};
diff --git a/arch/arm/boot/dts/imx6qdl-prti6q.dtsi b/arch/arm/boot/dts/imx6qdl-prti6q.dtsi
index 19578f660b09..70dfa07a1698 100644
--- a/arch/arm/boot/dts/imx6qdl-prti6q.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-prti6q.dtsi
@@ -69,6 +69,7 @@ &usbh1 {
vbus-supply = <®_usb_h1_vbus>;
phy_type = "utmi";
dr_mode = "host";
+ disable-over-current;
status = "okay";
};
@@ -78,10 +79,18 @@ &usbotg {
pinctrl-0 = <&pinctrl_usbotg>;
phy_type = "utmi";
dr_mode = "host";
- disable-over-current;
+ over-current-active-low;
status = "okay";
};
+&usbphynop1 {
+ status = "disabled";
+};
+
+&usbphynop2 {
+ status = "disabled";
+};
+
&usdhc1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usdhc1>;
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
index 64df64339119..2f52b91b7215 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
@@ -31,32 +31,56 @@ sdio_pwrseq: sdio-pwrseq {
reset-gpios = <&gpio0 RK_PB2 GPIO_ACTIVE_LOW>;
};
- vcc12v_dcin: dc-12v {
+ sound {
+ compatible = "audio-graph-card";
+ label = "Analog";
+ dais = <&i2s0_p0>;
+ };
+
+ sound-dit {
+ compatible = "audio-graph-card";
+ label = "SPDIF";
+ dais = <&spdif_p0>;
+ };
+
+ spdif-dit {
+ compatible = "linux,spdif-dit";
+ #sound-dai-cells = <0>;
+
+ port {
+ dit_p0_0: endpoint {
+ remote-endpoint = <&spdif_p0_0>;
+ };
+ };
+ };
+
+ vbus_typec: vbus-typec-regulator {
compatible = "regulator-fixed";
- regulator-name = "vcc12v_dcin";
+ enable-active-high;
+ gpio = <&gpio1 RK_PA3 GPIO_ACTIVE_HIGH>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&vcc5v0_typec_en>;
+ regulator-name = "vbus_typec";
regulator-always-on;
- regulator-boot-on;
- regulator-min-microvolt = <12000000>;
- regulator-max-microvolt = <12000000>;
+ vin-supply = <&vcc5v0_sys>;
};
- vcc5v0_sys: vcc-sys {
+ vcc12v_dcin: dc-12v {
compatible = "regulator-fixed";
- regulator-name = "vcc5v0_sys";
+ regulator-name = "vcc12v_dcin";
regulator-always-on;
regulator-boot-on;
- regulator-min-microvolt = <5000000>;
- regulator-max-microvolt = <5000000>;
- vin-supply = <&vcc12v_dcin>;
+ regulator-min-microvolt = <12000000>;
+ regulator-max-microvolt = <12000000>;
};
- vcc_0v9: vcc-0v9 {
+ vcc3v3_lan: vcc3v3-lan-regulator {
compatible = "regulator-fixed";
- regulator-name = "vcc_0v9";
+ regulator-name = "vcc3v3_lan";
regulator-always-on;
regulator-boot-on;
- regulator-min-microvolt = <900000>;
- regulator-max-microvolt = <900000>;
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
vin-supply = <&vcc3v3_sys>;
};
@@ -93,28 +117,24 @@ vcc5v0_host: vcc5v0-host-regulator {
vin-supply = <&vcc5v0_sys>;
};
- vcc5v0_typec: vcc5v0-typec-regulator {
+ vcc5v0_sys: vcc-sys {
compatible = "regulator-fixed";
- enable-active-high;
- gpio = <&gpio1 RK_PA3 GPIO_ACTIVE_HIGH>;
- pinctrl-names = "default";
- pinctrl-0 = <&vcc5v0_typec_en>;
- regulator-name = "vcc5v0_typec";
+ regulator-name = "vcc5v0_sys";
regulator-always-on;
- vin-supply = <&vcc5v0_sys>;
+ regulator-boot-on;
+ regulator-min-microvolt = <5000000>;
+ regulator-max-microvolt = <5000000>;
+ vin-supply = <&vcc12v_dcin>;
};
- vcc_lan: vcc3v3-phy-regulator {
+ vcc_0v9: vcc-0v9 {
compatible = "regulator-fixed";
- regulator-name = "vcc_lan";
+ regulator-name = "vcc_0v9";
regulator-always-on;
regulator-boot-on;
- regulator-min-microvolt = <3300000>;
- regulator-max-microvolt = <3300000>;
-
- regulator-state-mem {
- regulator-off-in-suspend;
- };
+ regulator-min-microvolt = <900000>;
+ regulator-max-microvolt = <900000>;
+ vin-supply = <&vcc3v3_sys>;
};
vdd_log: vdd-log {
@@ -161,7 +181,7 @@ &gmac {
assigned-clocks = <&cru SCLK_RMII_SRC>;
assigned-clock-parents = <&clkin_gmac>;
clock_in_out = "input";
- phy-supply = <&vcc_lan>;
+ phy-supply = <&vcc3v3_lan>;
phy-mode = "rgmii";
pinctrl-names = "default";
pinctrl-0 = <&rgmii_pins>;
@@ -266,8 +286,8 @@ regulator-state-mem {
};
};
- vcc1v8_codec: LDO_REG1 {
- regulator-name = "vcc1v8_codec";
+ vcca1v8_codec: LDO_REG1 {
+ regulator-name = "vcca1v8_codec";
regulator-always-on;
regulator-boot-on;
regulator-min-microvolt = <1800000>;
@@ -277,8 +297,8 @@ regulator-state-mem {
};
};
- vcc1v8_hdmi: LDO_REG2 {
- regulator-name = "vcc1v8_hdmi";
+ vcca1v8_hdmi: LDO_REG2 {
+ regulator-name = "vcca1v8_hdmi";
regulator-always-on;
regulator-boot-on;
regulator-min-microvolt = <1800000>;
@@ -335,8 +355,8 @@ regulator-state-mem {
};
};
- vcc0v9_hdmi: LDO_REG7 {
- regulator-name = "vcc0v9_hdmi";
+ vcca0v9_hdmi: LDO_REG7 {
+ regulator-name = "vcca0v9_hdmi";
regulator-always-on;
regulator-boot-on;
regulator-min-microvolt = <900000>;
@@ -362,8 +382,6 @@ vcc_cam: SWITCH_REG1 {
regulator-name = "vcc_cam";
regulator-always-on;
regulator-boot-on;
- regulator-min-microvolt = <3300000>;
- regulator-max-microvolt = <3300000>;
regulator-state-mem {
regulator-off-in-suspend;
};
@@ -373,8 +391,6 @@ vcc_mipi: SWITCH_REG2 {
regulator-name = "vcc_mipi";
regulator-always-on;
regulator-boot-on;
- regulator-min-microvolt = <3300000>;
- regulator-max-microvolt = <3300000>;
regulator-state-mem {
regulator-off-in-suspend;
};
@@ -425,6 +441,20 @@ &i2c1 {
i2c-scl-rising-time-ns = <300>;
i2c-scl-falling-time-ns = <15>;
status = "okay";
+
+ es8316: codec@11 {
+ compatible = "everest,es8316";
+ reg = <0x11>;
+ clocks = <&cru SCLK_I2S_8CH_OUT>;
+ clock-names = "mclk";
+ #sound-dai-cells = <0>;
+
+ port {
+ es8316_p0_0: endpoint {
+ remote-endpoint = <&i2s0_p0_0>;
+ };
+ };
+ };
};
&i2c3 {
@@ -443,6 +473,14 @@ &i2s0 {
rockchip,playback-channels = <8>;
rockchip,capture-channels = <8>;
status = "okay";
+
+ i2s0_p0: port {
+ i2s0_p0_0: endpoint {
+ dai-format = "i2s";
+ mclk-fs = <256>;
+ remote-endpoint = <&es8316_p0_0>;
+ };
+ };
};
&i2s1 {
@@ -455,21 +493,10 @@ &i2s2 {
};
&io_domains {
- status = "okay";
-
+ audio-supply = <&vcca1v8_codec>;
bt656-supply = <&vcc_3v0>;
- audio-supply = <&vcc1v8_codec>;
- sdmmc-supply = <&vcc_sdio>;
gpio1830-supply = <&vcc_3v0>;
-};
-
-&pmu_io_domains {
- status = "okay";
-
- pmu1830-supply = <&vcc_3v0>;
-};
-
-&pcie_phy {
+ sdmmc-supply = <&vcc_sdio>;
status = "okay";
};
@@ -485,6 +512,10 @@ &pcie0 {
status = "okay";
};
+&pcie_phy {
+ status = "okay";
+};
+
&pinctrl {
bt {
bt_enable_h: bt-enable-h {
@@ -506,6 +537,20 @@ pcie_pwr_en: pcie-pwr-en {
};
};
+ pmic {
+ pmic_int_l: pmic-int-l {
+ rockchip,pins = <1 RK_PC5 RK_FUNC_GPIO &pcfg_pull_up>;
+ };
+
+ vsel1_pin: vsel1-pin {
+ rockchip,pins = <1 RK_PC1 RK_FUNC_GPIO &pcfg_pull_down>;
+ };
+
+ vsel2_pin: vsel2-pin {
+ rockchip,pins = <1 RK_PB6 RK_FUNC_GPIO &pcfg_pull_down>;
+ };
+ };
+
sdio0 {
sdio0_bus4: sdio0-bus4 {
rockchip,pins = <2 RK_PC4 1 &pcfg_pull_up_20ma>,
@@ -523,20 +568,6 @@ sdio0_clk: sdio0-clk {
};
};
- pmic {
- pmic_int_l: pmic-int-l {
- rockchip,pins = <1 RK_PC5 RK_FUNC_GPIO &pcfg_pull_up>;
- };
-
- vsel1_pin: vsel1-pin {
- rockchip,pins = <1 RK_PC1 RK_FUNC_GPIO &pcfg_pull_down>;
- };
-
- vsel2_pin: vsel2-pin {
- rockchip,pins = <1 RK_PB6 RK_FUNC_GPIO &pcfg_pull_down>;
- };
- };
-
usb-typec {
vcc5v0_typec_en: vcc5v0-typec-en {
rockchip,pins = <1 RK_PA3 RK_FUNC_GPIO &pcfg_pull_up>;
@@ -560,6 +591,11 @@ wifi_host_wake_l: wifi-host-wake-l {
};
};
+&pmu_io_domains {
+ pmu1830-supply = <&vcc_3v0>;
+ status = "okay";
+};
+
&pwm2 {
status = "okay";
};
@@ -570,6 +606,14 @@ &saradc {
vref-supply = <&vcc_1v8>;
};
+&sdhci {
+ max-frequency = <150000000>;
+ bus-width = <8>;
+ mmc-hs200-1_8v;
+ non-removable;
+ status = "okay";
+};
+
&sdio0 {
#address-cells = <1>;
#size-cells = <0>;
@@ -597,12 +641,13 @@ &sdmmc {
status = "okay";
};
-&sdhci {
- bus-width = <8>;
- mmc-hs400-1_8v;
- mmc-hs400-enhanced-strobe;
- non-removable;
- status = "okay";
+&spdif {
+
+ spdif_p0: port {
+ spdif_p0_0: endpoint {
+ remote-endpoint = <&dit_p0_0>;
+ };
+ };
};
&tcphy0 {
@@ -677,13 +722,13 @@ &usbdrd3_0 {
status = "okay";
};
-&usbdrd_dwc3_0 {
+&usbdrd3_1 {
status = "okay";
- dr_mode = "otg";
};
-&usbdrd3_1 {
+&usbdrd_dwc3_0 {
status = "okay";
+ dr_mode = "host";
};
&usbdrd_dwc3_1 {
diff --git a/arch/mips/include/asm/dec/prom.h b/arch/mips/include/asm/dec/prom.h
index 1e1247add1cf..908e96e3a311 100644
--- a/arch/mips/include/asm/dec/prom.h
+++ b/arch/mips/include/asm/dec/prom.h
@@ -70,7 +70,7 @@ static inline bool prom_is_rex(u32 magic)
*/
typedef struct {
int pagesize;
- unsigned char bitmap[0];
+ unsigned char bitmap[];
} memmap;
diff --git a/arch/powerpc/kernel/rtas_flash.c b/arch/powerpc/kernel/rtas_flash.c
index a99179d83538..56bd0aa30f93 100644
--- a/arch/powerpc/kernel/rtas_flash.c
+++ b/arch/powerpc/kernel/rtas_flash.c
@@ -710,9 +710,9 @@ static int __init rtas_flash_init(void)
if (!rtas_validate_flash_data.buf)
return -ENOMEM;
- flash_block_cache = kmem_cache_create("rtas_flash_cache",
- RTAS_BLK_SIZE, RTAS_BLK_SIZE, 0,
- NULL);
+ flash_block_cache = kmem_cache_create_usercopy("rtas_flash_cache",
+ RTAS_BLK_SIZE, RTAS_BLK_SIZE,
+ 0, 0, RTAS_BLK_SIZE, NULL);
if (!flash_block_cache) {
printk(KERN_ERR "%s: failed to create block cache\n",
__func__);
diff --git a/arch/powerpc/mm/kasan/Makefile b/arch/powerpc/mm/kasan/Makefile
index bb1a5408b86b..8636b17c6a20 100644
--- a/arch/powerpc/mm/kasan/Makefile
+++ b/arch/powerpc/mm/kasan/Makefile
@@ -1,6 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
KASAN_SANITIZE := n
+KCOV_INSTRUMENT := n
obj-$(CONFIG_PPC32) += kasan_init_32.o
obj-$(CONFIG_PPC_8xx) += 8xx.o
diff --git a/arch/x86/include/asm/entry-common.h b/arch/x86/include/asm/entry-common.h
index 4a382fb6a9ef..5443851d3aa6 100644
--- a/arch/x86/include/asm/entry-common.h
+++ b/arch/x86/include/asm/entry-common.h
@@ -78,6 +78,7 @@ static inline void arch_exit_to_user_mode_prepare(struct pt_regs *regs,
static __always_inline void arch_exit_to_user_mode(void)
{
mds_user_clear_cpu_buffers();
+ amd_clear_divider();
}
#define arch_exit_to_user_mode arch_exit_to_user_mode
diff --git a/arch/x86/include/asm/nospec-branch.h b/arch/x86/include/asm/nospec-branch.h
index 99fbce2c1c7c..7b4782249a92 100644
--- a/arch/x86/include/asm/nospec-branch.h
+++ b/arch/x86/include/asm/nospec-branch.h
@@ -156,9 +156,9 @@
.endm
#ifdef CONFIG_CPU_UNRET_ENTRY
-#define CALL_ZEN_UNTRAIN_RET "call zen_untrain_ret"
+#define CALL_UNTRAIN_RET "call entry_untrain_ret"
#else
-#define CALL_ZEN_UNTRAIN_RET ""
+#define CALL_UNTRAIN_RET ""
#endif
/*
@@ -166,7 +166,7 @@
* return thunk isn't mapped into the userspace tables (then again, AMD
* typically has NO_MELTDOWN).
*
- * While zen_untrain_ret() doesn't clobber anything but requires stack,
+ * While retbleed_untrain_ret() doesn't clobber anything but requires stack,
* entry_ibpb() will clobber AX, CX, DX.
*
* As such, this must be placed after every *SWITCH_TO_KERNEL_CR3 at a point
@@ -177,14 +177,9 @@
defined(CONFIG_CPU_SRSO)
ANNOTATE_UNRET_END
ALTERNATIVE_2 "", \
- CALL_ZEN_UNTRAIN_RET, X86_FEATURE_UNRET, \
+ CALL_UNTRAIN_RET, X86_FEATURE_UNRET, \
"call entry_ibpb", X86_FEATURE_ENTRY_IBPB
#endif
-
-#ifdef CONFIG_CPU_SRSO
- ALTERNATIVE_2 "", "call srso_untrain_ret", X86_FEATURE_SRSO, \
- "call srso_untrain_ret_alias", X86_FEATURE_SRSO_ALIAS
-#endif
.endm
#else /* __ASSEMBLY__ */
@@ -195,10 +190,21 @@
_ASM_PTR " 999b\n\t" \
".popsection\n\t"
+#ifdef CONFIG_RETHUNK
extern void __x86_return_thunk(void);
-extern void zen_untrain_ret(void);
+#else
+static inline void __x86_return_thunk(void) {}
+#endif
+
+extern void retbleed_return_thunk(void);
+extern void srso_return_thunk(void);
+extern void srso_alias_return_thunk(void);
+
+extern void retbleed_untrain_ret(void);
extern void srso_untrain_ret(void);
-extern void srso_untrain_ret_alias(void);
+extern void srso_alias_untrain_ret(void);
+
+extern void entry_untrain_ret(void);
extern void entry_ibpb(void);
#ifdef CONFIG_RETPOLINE
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 7f351093cd94..2bc1c78a7cc5 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -1332,3 +1332,4 @@ void noinstr amd_clear_divider(void)
asm volatile(ALTERNATIVE("", "div %2\n\t", X86_BUG_DIV0)
:: "a" (0), "d" (0), "r" (1));
}
+EXPORT_SYMBOL_GPL(amd_clear_divider);
diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index d31639e3ce28..4d11a50089b2 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -61,6 +61,8 @@ EXPORT_SYMBOL_GPL(x86_pred_cmd);
static DEFINE_MUTEX(spec_ctrl_mutex);
+void (*x86_return_thunk)(void) __ro_after_init = &__x86_return_thunk;
+
/* Update SPEC_CTRL MSR and its cached copy unconditionally */
static void update_spec_ctrl(u64 val)
{
@@ -155,8 +157,13 @@ void __init cpu_select_mitigations(void)
l1tf_select_mitigation();
md_clear_select_mitigation();
srbds_select_mitigation();
- gds_select_mitigation();
+
+ /*
+ * srso_select_mitigation() depends and must run after
+ * retbleed_select_mitigation().
+ */
srso_select_mitigation();
+ gds_select_mitigation();
}
/*
@@ -976,6 +983,9 @@ static void __init retbleed_select_mitigation(void)
setup_force_cpu_cap(X86_FEATURE_RETHUNK);
setup_force_cpu_cap(X86_FEATURE_UNRET);
+ if (IS_ENABLED(CONFIG_RETHUNK))
+ x86_return_thunk = retbleed_return_thunk;
+
if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD &&
boot_cpu_data.x86_vendor != X86_VENDOR_HYGON)
pr_err(RETBLEED_UNTRAIN_MSG);
@@ -2318,9 +2328,10 @@ static void __init srso_select_mitigation(void)
* Zen1/2 with SMT off aren't vulnerable after the right
* IBPB microcode has been applied.
*/
- if ((boot_cpu_data.x86 < 0x19) &&
- (!cpu_smt_possible() || (cpu_smt_control == CPU_SMT_DISABLED)))
+ if (boot_cpu_data.x86 < 0x19 && !cpu_smt_possible()) {
setup_force_cpu_cap(X86_FEATURE_SRSO_NO);
+ return;
+ }
}
if (retbleed_mitigation == RETBLEED_MITIGATION_IBPB) {
@@ -2349,11 +2360,15 @@ static void __init srso_select_mitigation(void)
* like ftrace, static_call, etc.
*/
setup_force_cpu_cap(X86_FEATURE_RETHUNK);
+ setup_force_cpu_cap(X86_FEATURE_UNRET);
- if (boot_cpu_data.x86 == 0x19)
+ if (boot_cpu_data.x86 == 0x19) {
setup_force_cpu_cap(X86_FEATURE_SRSO_ALIAS);
- else
+ x86_return_thunk = srso_alias_return_thunk;
+ } else {
setup_force_cpu_cap(X86_FEATURE_SRSO);
+ x86_return_thunk = srso_return_thunk;
+ }
srso_mitigation = SRSO_MITIGATION_SAFE_RET;
} else {
pr_err("WARNING: kernel not compiled with CPU_SRSO.\n");
@@ -2602,6 +2617,9 @@ static ssize_t gds_show_state(char *buf)
static ssize_t srso_show_state(char *buf)
{
+ if (boot_cpu_has(X86_FEATURE_SRSO_NO))
+ return sysfs_emit(buf, "Mitigation: SMT disabled\n");
+
return sysfs_emit(buf, "%s%s\n",
srso_strings[srso_mitigation],
(cpu_has_ibpb_brtype_microcode() ? "" : ", no microcode"));
diff --git a/arch/x86/kernel/static_call.c b/arch/x86/kernel/static_call.c
index 2973b3fb0ec1..759b986b7f03 100644
--- a/arch/x86/kernel/static_call.c
+++ b/arch/x86/kernel/static_call.c
@@ -123,6 +123,19 @@ EXPORT_SYMBOL_GPL(arch_static_call_transform);
*/
bool __static_call_fixup(void *tramp, u8 op, void *dest)
{
+ unsigned long addr = (unsigned long)tramp;
+ /*
+ * Not all .return_sites are a static_call trampoline (most are not).
+ * Check if the 3 bytes after the return are still kernel text, if not,
+ * then this definitely is not a trampoline and we need not worry
+ * further.
+ *
+ * This avoids the memcmp() below tripping over pagefaults etc..
+ */
+ if (((addr >> PAGE_SHIFT) != ((addr + 7) >> PAGE_SHIFT)) &&
+ !kernel_text_address(addr + 7))
+ return false;
+
if (memcmp(tramp+5, tramp_ud, 3)) {
/* Not a trampoline site, not our problem. */
return false;
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index 28f5cc0a9dec..98838b784524 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -198,8 +198,6 @@ DEFINE_IDTENTRY(exc_divide_error)
{
do_error_trap(regs, 0, "divide error", X86_TRAP_DE, SIGFPE,
FPE_INTDIV, error_get_trap_addr(regs));
-
- amd_clear_divider();
}
DEFINE_IDTENTRY(exc_overflow)
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 72ba175cb9d4..f0d4500ae77a 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -134,18 +134,18 @@ SECTIONS
KPROBES_TEXT
ALIGN_ENTRY_TEXT_BEGIN
#ifdef CONFIG_CPU_SRSO
- *(.text.__x86.rethunk_untrain)
+ *(.text..__x86.rethunk_untrain)
#endif
ENTRY_TEXT
#ifdef CONFIG_CPU_SRSO
/*
- * See the comment above srso_untrain_ret_alias()'s
+ * See the comment above srso_alias_untrain_ret()'s
* definition.
*/
- . = srso_untrain_ret_alias | (1 << 2) | (1 << 8) | (1 << 14) | (1 << 20);
- *(.text.__x86.rethunk_safe)
+ . = srso_alias_untrain_ret | (1 << 2) | (1 << 8) | (1 << 14) | (1 << 20);
+ *(.text..__x86.rethunk_safe)
#endif
ALIGN_ENTRY_TEXT_END
SOFTIRQENTRY_TEXT
@@ -155,8 +155,8 @@ SECTIONS
#ifdef CONFIG_RETPOLINE
__indirect_thunk_start = .;
- *(.text.__x86.indirect_thunk)
- *(.text.__x86.return_thunk)
+ *(.text..__x86.indirect_thunk)
+ *(.text..__x86.return_thunk)
__indirect_thunk_end = .;
#endif
} :text =0xcccc
@@ -518,7 +518,7 @@ INIT_PER_CPU(irq_stack_backing_store);
#endif
#ifdef CONFIG_RETHUNK
-. = ASSERT((__ret & 0x3f) == 0, "__ret not cacheline-aligned");
+. = ASSERT((retbleed_return_thunk & 0x3f) == 0, "retbleed_return_thunk not cacheline-aligned");
. = ASSERT((srso_safe_ret & 0x3f) == 0, "srso_safe_ret not cacheline-aligned");
#endif
@@ -533,8 +533,8 @@ INIT_PER_CPU(irq_stack_backing_store);
* Instead do: (A | B) - (A & B) in order to compute the XOR
* of the two function addresses:
*/
-. = ASSERT(((ABSOLUTE(srso_untrain_ret_alias) | srso_safe_ret_alias) -
- (ABSOLUTE(srso_untrain_ret_alias) & srso_safe_ret_alias)) == ((1 << 2) | (1 << 8) | (1 << 14) | (1 << 20)),
+. = ASSERT(((ABSOLUTE(srso_alias_untrain_ret) | srso_alias_safe_ret) -
+ (ABSOLUTE(srso_alias_untrain_ret) & srso_alias_safe_ret)) == ((1 << 2) | (1 << 8) | (1 << 14) | (1 << 20)),
"SRSO function pair won't alias");
#endif
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 8544bca6b335..1616e39ddc3f 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -3376,6 +3376,7 @@ static void svm_flush_tlb_gva(struct kvm_vcpu *vcpu, gva_t gva)
static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu)
{
+ amd_clear_divider();
}
static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu)
diff --git a/arch/x86/lib/retpoline.S b/arch/x86/lib/retpoline.S
index 5f7eed97487e..6f5321b36dbb 100644
--- a/arch/x86/lib/retpoline.S
+++ b/arch/x86/lib/retpoline.S
@@ -11,7 +11,7 @@
#include <asm/frame.h>
#include <asm/nops.h>
- .section .text.__x86.indirect_thunk
+ .section .text..__x86.indirect_thunk
.macro RETPOLINE reg
ANNOTATE_INTRA_FUNCTION_CALL
@@ -75,74 +75,105 @@ SYM_CODE_END(__x86_indirect_thunk_array)
#ifdef CONFIG_RETHUNK
/*
- * srso_untrain_ret_alias() and srso_safe_ret_alias() are placed at
+ * srso_alias_untrain_ret() and srso_alias_safe_ret() are placed at
* special addresses:
*
- * - srso_untrain_ret_alias() is 2M aligned
- * - srso_safe_ret_alias() is also in the same 2M page but bits 2, 8, 14
+ * - srso_alias_untrain_ret() is 2M aligned
+ * - srso_alias_safe_ret() is also in the same 2M page but bits 2, 8, 14
* and 20 in its virtual address are set (while those bits in the
- * srso_untrain_ret_alias() function are cleared).
+ * srso_alias_untrain_ret() function are cleared).
*
* This guarantees that those two addresses will alias in the branch
* target buffer of Zen3/4 generations, leading to any potential
* poisoned entries at that BTB slot to get evicted.
*
- * As a result, srso_safe_ret_alias() becomes a safe return.
+ * As a result, srso_alias_safe_ret() becomes a safe return.
*/
#ifdef CONFIG_CPU_SRSO
- .section .text.__x86.rethunk_untrain
+ .section .text..__x86.rethunk_untrain
-SYM_START(srso_untrain_ret_alias, SYM_L_GLOBAL, SYM_A_NONE)
+SYM_START(srso_alias_untrain_ret, SYM_L_GLOBAL, SYM_A_NONE)
+ UNWIND_HINT_FUNC
ASM_NOP2
lfence
- jmp __x86_return_thunk
-SYM_FUNC_END(srso_untrain_ret_alias)
-__EXPORT_THUNK(srso_untrain_ret_alias)
+ jmp srso_alias_return_thunk
+SYM_FUNC_END(srso_alias_untrain_ret)
+__EXPORT_THUNK(srso_alias_untrain_ret)
- .section .text.__x86.rethunk_safe
+ .section .text..__x86.rethunk_safe
+#else
+/* dummy definition for alternatives */
+SYM_START(srso_alias_untrain_ret, SYM_L_GLOBAL, SYM_A_NONE)
+ ANNOTATE_UNRET_SAFE
+ ret
+ int3
+SYM_FUNC_END(srso_alias_untrain_ret)
#endif
-/* Needs a definition for the __x86_return_thunk alternative below. */
-SYM_START(srso_safe_ret_alias, SYM_L_GLOBAL, SYM_A_NONE)
-#ifdef CONFIG_CPU_SRSO
- add $8, %_ASM_SP
+SYM_START(srso_alias_safe_ret, SYM_L_GLOBAL, SYM_A_NONE)
+ lea 8(%_ASM_SP), %_ASM_SP
UNWIND_HINT_FUNC
-#endif
ANNOTATE_UNRET_SAFE
ret
int3
-SYM_FUNC_END(srso_safe_ret_alias)
+SYM_FUNC_END(srso_alias_safe_ret)
- .section .text.__x86.return_thunk
+ .section .text..__x86.return_thunk
+
+SYM_CODE_START(srso_alias_return_thunk)
+ UNWIND_HINT_FUNC
+ ANNOTATE_NOENDBR
+ call srso_alias_safe_ret
+ ud2
+SYM_CODE_END(srso_alias_return_thunk)
+
+/*
+ * Some generic notes on the untraining sequences:
+ *
+ * They are interchangeable when it comes to flushing potentially wrong
+ * RET predictions from the BTB.
+ *
+ * The SRSO Zen1/2 (MOVABS) untraining sequence is longer than the
+ * Retbleed sequence because the return sequence done there
+ * (srso_safe_ret()) is longer and the return sequence must fully nest
+ * (end before) the untraining sequence. Therefore, the untraining
+ * sequence must fully overlap the return sequence.
+ *
+ * Regarding alignment - the instructions which need to be untrained,
+ * must all start at a cacheline boundary for Zen1/2 generations. That
+ * is, instruction sequences starting at srso_safe_ret() and
+ * the respective instruction sequences at retbleed_return_thunk()
+ * must start at a cacheline boundary.
+ */
/*
* Safety details here pertain to the AMD Zen{1,2} microarchitecture:
- * 1) The RET at __x86_return_thunk must be on a 64 byte boundary, for
+ * 1) The RET at retbleed_return_thunk must be on a 64 byte boundary, for
* alignment within the BTB.
- * 2) The instruction at zen_untrain_ret must contain, and not
+ * 2) The instruction at retbleed_untrain_ret must contain, and not
* end with, the 0xc3 byte of the RET.
* 3) STIBP must be enabled, or SMT disabled, to prevent the sibling thread
* from re-poisioning the BTB prediction.
*/
.align 64
- .skip 64 - (__ret - zen_untrain_ret), 0xcc
-SYM_FUNC_START_NOALIGN(zen_untrain_ret);
+ .skip 64 - (retbleed_return_thunk - retbleed_untrain_ret), 0xcc
+SYM_FUNC_START_NOALIGN(retbleed_untrain_ret);
/*
- * As executed from zen_untrain_ret, this is:
+ * As executed from retbleed_untrain_ret, this is:
*
* TEST $0xcc, %bl
* LFENCE
- * JMP __x86_return_thunk
+ * JMP retbleed_return_thunk
*
* Executing the TEST instruction has a side effect of evicting any BTB
* prediction (potentially attacker controlled) attached to the RET, as
- * __x86_return_thunk + 1 isn't an instruction boundary at the moment.
+ * retbleed_return_thunk + 1 isn't an instruction boundary at the moment.
*/
.byte 0xf6
/*
- * As executed from __x86_return_thunk, this is a plain RET.
+ * As executed from retbleed_return_thunk, this is a plain RET.
*
* As part of the TEST above, RET is the ModRM byte, and INT3 the imm8.
*
@@ -154,13 +185,13 @@ SYM_FUNC_START_NOALIGN(zen_untrain_ret);
* With SMT enabled and STIBP active, a sibling thread cannot poison
* RET's prediction to a type of its choice, but can evict the
* prediction due to competitive sharing. If the prediction is
- * evicted, __x86_return_thunk will suffer Straight Line Speculation
+ * evicted, retbleed_return_thunk will suffer Straight Line Speculation
* which will be contained safely by the INT3.
*/
-SYM_INNER_LABEL(__ret, SYM_L_GLOBAL)
+SYM_INNER_LABEL(retbleed_return_thunk, SYM_L_GLOBAL)
ret
int3
-SYM_CODE_END(__ret)
+SYM_CODE_END(retbleed_return_thunk)
/*
* Ensure the TEST decoding / BTB invalidation is complete.
@@ -171,16 +202,16 @@ SYM_CODE_END(__ret)
* Jump back and execute the RET in the middle of the TEST instruction.
* INT3 is for SLS protection.
*/
- jmp __ret
+ jmp retbleed_return_thunk
int3
-SYM_FUNC_END(zen_untrain_ret)
-__EXPORT_THUNK(zen_untrain_ret)
+SYM_FUNC_END(retbleed_untrain_ret)
+__EXPORT_THUNK(retbleed_untrain_ret)
/*
- * SRSO untraining sequence for Zen1/2, similar to zen_untrain_ret()
+ * SRSO untraining sequence for Zen1/2, similar to retbleed_untrain_ret()
* above. On kernel entry, srso_untrain_ret() is executed which is a
*
- * movabs $0xccccccc308c48348,%rax
+ * movabs $0xccccc30824648d48,%rax
*
* and when the return thunk executes the inner label srso_safe_ret()
* later, it is a stack manipulation and a RET which is mispredicted and
@@ -191,22 +222,44 @@ __EXPORT_THUNK(zen_untrain_ret)
SYM_START(srso_untrain_ret, SYM_L_GLOBAL, SYM_A_NONE)
.byte 0x48, 0xb8
+/*
+ * This forces the function return instruction to speculate into a trap
+ * (UD2 in srso_return_thunk() below). This RET will then mispredict
+ * and execution will continue at the return site read from the top of
+ * the stack.
+ */
SYM_INNER_LABEL(srso_safe_ret, SYM_L_GLOBAL)
- add $8, %_ASM_SP
+ lea 8(%_ASM_SP), %_ASM_SP
ret
int3
int3
- int3
+ /* end of movabs */
lfence
call srso_safe_ret
- int3
+ ud2
SYM_CODE_END(srso_safe_ret)
SYM_FUNC_END(srso_untrain_ret)
__EXPORT_THUNK(srso_untrain_ret)
-SYM_FUNC_START(__x86_return_thunk)
- ALTERNATIVE_2 "jmp __ret", "call srso_safe_ret", X86_FEATURE_SRSO, \
- "call srso_safe_ret_alias", X86_FEATURE_SRSO_ALIAS
+SYM_CODE_START(srso_return_thunk)
+ UNWIND_HINT_FUNC
+ ANNOTATE_NOENDBR
+ call srso_safe_ret
+ ud2
+SYM_CODE_END(srso_return_thunk)
+
+SYM_FUNC_START(entry_untrain_ret)
+ ALTERNATIVE_2 "jmp retbleed_untrain_ret", \
+ "jmp srso_untrain_ret", X86_FEATURE_SRSO, \
+ "jmp srso_alias_untrain_ret", X86_FEATURE_SRSO_ALIAS
+SYM_FUNC_END(entry_untrain_ret)
+__EXPORT_THUNK(entry_untrain_ret)
+
+SYM_CODE_START(__x86_return_thunk)
+ UNWIND_HINT_FUNC
+ ANNOTATE_NOENDBR
+ ANNOTATE_UNRET_SAFE
+ ret
int3
SYM_CODE_END(__x86_return_thunk)
EXPORT_SYMBOL(__x86_return_thunk)
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 2695ece47eb0..49d5375b04f4 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -432,6 +432,9 @@ static const struct usb_device_id blacklist_table[] = {
{ USB_DEVICE(0x0489, 0xe0d9), .driver_info = BTUSB_MEDIATEK |
BTUSB_WIDEBAND_SPEECH |
BTUSB_VALID_LE_STATES },
+ { USB_DEVICE(0x0489, 0xe0f5), .driver_info = BTUSB_MEDIATEK |
+ BTUSB_WIDEBAND_SPEECH |
+ BTUSB_VALID_LE_STATES },
{ USB_DEVICE(0x13d3, 0x3568), .driver_info = BTUSB_MEDIATEK |
BTUSB_WIDEBAND_SPEECH |
BTUSB_VALID_LE_STATES },
diff --git a/drivers/bus/Makefile b/drivers/bus/Makefile
index 397e35392bff..16c47a0616ae 100644
--- a/drivers/bus/Makefile
+++ b/drivers/bus/Makefile
@@ -38,4 +38,4 @@ obj-$(CONFIG_VEXPRESS_CONFIG) += vexpress-config.o
obj-$(CONFIG_DA8XX_MSTPRI) += da8xx-mstpri.o
# MHI
-obj-$(CONFIG_MHI_BUS) += mhi/
+obj-y += mhi/
diff --git a/drivers/bus/mhi/Kconfig b/drivers/bus/mhi/Kconfig
index e841c1097fb4..4748df7f9cd5 100644
--- a/drivers/bus/mhi/Kconfig
+++ b/drivers/bus/mhi/Kconfig
@@ -2,21 +2,7 @@
#
# MHI bus
#
-# Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
+# Copyright (c) 2021, Linaro Ltd.
#
-config MHI_BUS
- tristate "Modem Host Interface (MHI) bus"
- help
- Bus driver for MHI protocol. Modem Host Interface (MHI) is a
- communication protocol used by the host processors to control
- and communicate with modem devices over a high speed peripheral
- bus or shared memory.
-
-config MHI_BUS_DEBUG
- bool "Debugfs support for the MHI bus"
- depends on MHI_BUS && DEBUG_FS
- help
- Enable debugfs support for use with the MHI transport. Allows
- reading and/or modifying some values within the MHI controller
- for debug and test purposes.
+source "drivers/bus/mhi/host/Kconfig"
diff --git a/drivers/bus/mhi/Makefile b/drivers/bus/mhi/Makefile
index 19e6443b72df..5f5708a249f5 100644
--- a/drivers/bus/mhi/Makefile
+++ b/drivers/bus/mhi/Makefile
@@ -1,2 +1,2 @@
-# core layer
-obj-y += core/
+# Host MHI stack
+obj-y += host/
diff --git a/drivers/bus/mhi/core/Makefile b/drivers/bus/mhi/core/Makefile
deleted file mode 100644
index c3feb4130aa3..000000000000
--- a/drivers/bus/mhi/core/Makefile
+++ /dev/null
@@ -1,4 +0,0 @@
-obj-$(CONFIG_MHI_BUS) += mhi.o
-
-mhi-y := init.o main.o pm.o boot.o
-mhi-$(CONFIG_MHI_BUS_DEBUG) += debugfs.o
diff --git a/drivers/bus/mhi/core/boot.c b/drivers/bus/mhi/core/boot.c
deleted file mode 100644
index 24422f5c3d80..000000000000
--- a/drivers/bus/mhi/core/boot.c
+++ /dev/null
@@ -1,525 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
- *
- */
-
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/dma-direction.h>
-#include <linux/dma-mapping.h>
-#include <linux/firmware.h>
-#include <linux/interrupt.h>
-#include <linux/list.h>
-#include <linux/mhi.h>
-#include <linux/module.h>
-#include <linux/random.h>
-#include <linux/slab.h>
-#include <linux/wait.h>
-#include "internal.h"
-
-/* Setup RDDM vector table for RDDM transfer and program RXVEC */
-void mhi_rddm_prepare(struct mhi_controller *mhi_cntrl,
- struct image_info *img_info)
-{
- struct mhi_buf *mhi_buf = img_info->mhi_buf;
- struct bhi_vec_entry *bhi_vec = img_info->bhi_vec;
- void __iomem *base = mhi_cntrl->bhie;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- u32 sequence_id;
- unsigned int i;
-
- for (i = 0; i < img_info->entries - 1; i++, mhi_buf++, bhi_vec++) {
- bhi_vec->dma_addr = mhi_buf->dma_addr;
- bhi_vec->size = mhi_buf->len;
- }
-
- dev_dbg(dev, "BHIe programming for RDDM\n");
-
- mhi_write_reg(mhi_cntrl, base, BHIE_RXVECADDR_HIGH_OFFS,
- upper_32_bits(mhi_buf->dma_addr));
-
- mhi_write_reg(mhi_cntrl, base, BHIE_RXVECADDR_LOW_OFFS,
- lower_32_bits(mhi_buf->dma_addr));
-
- mhi_write_reg(mhi_cntrl, base, BHIE_RXVECSIZE_OFFS, mhi_buf->len);
- sequence_id = MHI_RANDOM_U32_NONZERO(BHIE_RXVECSTATUS_SEQNUM_BMSK);
-
- mhi_write_reg_field(mhi_cntrl, base, BHIE_RXVECDB_OFFS,
- BHIE_RXVECDB_SEQNUM_BMSK, BHIE_RXVECDB_SEQNUM_SHFT,
- sequence_id);
-
- dev_dbg(dev, "Address: %p and len: 0x%zx sequence: %u\n",
- &mhi_buf->dma_addr, mhi_buf->len, sequence_id);
-}
-
-/* Collect RDDM buffer during kernel panic */
-static int __mhi_download_rddm_in_panic(struct mhi_controller *mhi_cntrl)
-{
- int ret;
- u32 rx_status;
- enum mhi_ee_type ee;
- const u32 delayus = 2000;
- u32 retry = (mhi_cntrl->timeout_ms * 1000) / delayus;
- const u32 rddm_timeout_us = 200000;
- int rddm_retry = rddm_timeout_us / delayus;
- void __iomem *base = mhi_cntrl->bhie;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
-
- dev_dbg(dev, "Entered with pm_state:%s dev_state:%s ee:%s\n",
- to_mhi_pm_state_str(mhi_cntrl->pm_state),
- TO_MHI_STATE_STR(mhi_cntrl->dev_state),
- TO_MHI_EXEC_STR(mhi_cntrl->ee));
-
- /*
- * This should only be executing during a kernel panic, we expect all
- * other cores to shutdown while we're collecting RDDM buffer. After
- * returning from this function, we expect the device to reset.
- *
- * Normaly, we read/write pm_state only after grabbing the
- * pm_lock, since we're in a panic, skipping it. Also there is no
- * gurantee that this state change would take effect since
- * we're setting it w/o grabbing pm_lock
- */
- mhi_cntrl->pm_state = MHI_PM_LD_ERR_FATAL_DETECT;
- /* update should take the effect immediately */
- smp_wmb();
-
- /*
- * Make sure device is not already in RDDM. In case the device asserts
- * and a kernel panic follows, device will already be in RDDM.
- * Do not trigger SYS ERR again and proceed with waiting for
- * image download completion.
- */
- ee = mhi_get_exec_env(mhi_cntrl);
- if (ee != MHI_EE_RDDM) {
- dev_dbg(dev, "Trigger device into RDDM mode using SYS ERR\n");
- mhi_set_mhi_state(mhi_cntrl, MHI_STATE_SYS_ERR);
-
- dev_dbg(dev, "Waiting for device to enter RDDM\n");
- while (rddm_retry--) {
- ee = mhi_get_exec_env(mhi_cntrl);
- if (ee == MHI_EE_RDDM)
- break;
-
- udelay(delayus);
- }
-
- if (rddm_retry <= 0) {
- /* Hardware reset so force device to enter RDDM */
- dev_dbg(dev,
- "Did not enter RDDM, do a host req reset\n");
- mhi_write_reg(mhi_cntrl, mhi_cntrl->regs,
- MHI_SOC_RESET_REQ_OFFSET,
- MHI_SOC_RESET_REQ);
- udelay(delayus);
- }
-
- ee = mhi_get_exec_env(mhi_cntrl);
- }
-
- dev_dbg(dev,
- "Waiting for RDDM image download via BHIe, current EE:%s\n",
- TO_MHI_EXEC_STR(ee));
-
- while (retry--) {
- ret = mhi_read_reg_field(mhi_cntrl, base, BHIE_RXVECSTATUS_OFFS,
- BHIE_RXVECSTATUS_STATUS_BMSK,
- BHIE_RXVECSTATUS_STATUS_SHFT,
- &rx_status);
- if (ret)
- return -EIO;
-
- if (rx_status == BHIE_RXVECSTATUS_STATUS_XFER_COMPL)
- return 0;
-
- udelay(delayus);
- }
-
- ee = mhi_get_exec_env(mhi_cntrl);
- ret = mhi_read_reg(mhi_cntrl, base, BHIE_RXVECSTATUS_OFFS, &rx_status);
-
- dev_err(dev, "Did not complete RDDM transfer\n");
- dev_err(dev, "Current EE: %s\n", TO_MHI_EXEC_STR(ee));
- dev_err(dev, "RXVEC_STATUS: 0x%x\n", rx_status);
-
- return -EIO;
-}
-
-/* Download RDDM image from device */
-int mhi_download_rddm_img(struct mhi_controller *mhi_cntrl, bool in_panic)
-{
- void __iomem *base = mhi_cntrl->bhie;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- u32 rx_status;
-
- if (in_panic)
- return __mhi_download_rddm_in_panic(mhi_cntrl);
-
- dev_dbg(dev, "Waiting for RDDM image download via BHIe\n");
-
- /* Wait for the image download to complete */
- wait_event_timeout(mhi_cntrl->state_event,
- mhi_read_reg_field(mhi_cntrl, base,
- BHIE_RXVECSTATUS_OFFS,
- BHIE_RXVECSTATUS_STATUS_BMSK,
- BHIE_RXVECSTATUS_STATUS_SHFT,
- &rx_status) || rx_status,
- msecs_to_jiffies(mhi_cntrl->timeout_ms));
-
- return (rx_status == BHIE_RXVECSTATUS_STATUS_XFER_COMPL) ? 0 : -EIO;
-}
-EXPORT_SYMBOL_GPL(mhi_download_rddm_img);
-
-static int mhi_fw_load_amss(struct mhi_controller *mhi_cntrl,
- const struct mhi_buf *mhi_buf)
-{
- void __iomem *base = mhi_cntrl->bhie;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- rwlock_t *pm_lock = &mhi_cntrl->pm_lock;
- u32 tx_status, sequence_id;
- int ret;
-
- read_lock_bh(pm_lock);
- if (!MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state)) {
- read_unlock_bh(pm_lock);
- return -EIO;
- }
-
- sequence_id = MHI_RANDOM_U32_NONZERO(BHIE_TXVECSTATUS_SEQNUM_BMSK);
- dev_dbg(dev, "Starting AMSS download via BHIe. Sequence ID:%u\n",
- sequence_id);
- mhi_write_reg(mhi_cntrl, base, BHIE_TXVECADDR_HIGH_OFFS,
- upper_32_bits(mhi_buf->dma_addr));
-
- mhi_write_reg(mhi_cntrl, base, BHIE_TXVECADDR_LOW_OFFS,
- lower_32_bits(mhi_buf->dma_addr));
-
- mhi_write_reg(mhi_cntrl, base, BHIE_TXVECSIZE_OFFS, mhi_buf->len);
-
- mhi_write_reg_field(mhi_cntrl, base, BHIE_TXVECDB_OFFS,
- BHIE_TXVECDB_SEQNUM_BMSK, BHIE_TXVECDB_SEQNUM_SHFT,
- sequence_id);
- read_unlock_bh(pm_lock);
-
- /* Wait for the image download to complete */
- ret = wait_event_timeout(mhi_cntrl->state_event,
- MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state) ||
- mhi_read_reg_field(mhi_cntrl, base,
- BHIE_TXVECSTATUS_OFFS,
- BHIE_TXVECSTATUS_STATUS_BMSK,
- BHIE_TXVECSTATUS_STATUS_SHFT,
- &tx_status) || tx_status,
- msecs_to_jiffies(mhi_cntrl->timeout_ms));
- if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state) ||
- tx_status != BHIE_TXVECSTATUS_STATUS_XFER_COMPL)
- return -EIO;
-
- return (!ret) ? -ETIMEDOUT : 0;
-}
-
-static int mhi_fw_load_sbl(struct mhi_controller *mhi_cntrl,
- dma_addr_t dma_addr,
- size_t size)
-{
- u32 tx_status, val, session_id;
- int i, ret;
- void __iomem *base = mhi_cntrl->bhi;
- rwlock_t *pm_lock = &mhi_cntrl->pm_lock;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- struct {
- char *name;
- u32 offset;
- } error_reg[] = {
- { "ERROR_CODE", BHI_ERRCODE },
- { "ERROR_DBG1", BHI_ERRDBG1 },
- { "ERROR_DBG2", BHI_ERRDBG2 },
- { "ERROR_DBG3", BHI_ERRDBG3 },
- { NULL },
- };
-
- read_lock_bh(pm_lock);
- if (!MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state)) {
- read_unlock_bh(pm_lock);
- goto invalid_pm_state;
- }
-
- session_id = MHI_RANDOM_U32_NONZERO(BHI_TXDB_SEQNUM_BMSK);
- dev_dbg(dev, "Starting SBL download via BHI. Session ID:%u\n",
- session_id);
- mhi_write_reg(mhi_cntrl, base, BHI_STATUS, 0);
- mhi_write_reg(mhi_cntrl, base, BHI_IMGADDR_HIGH,
- upper_32_bits(dma_addr));
- mhi_write_reg(mhi_cntrl, base, BHI_IMGADDR_LOW,
- lower_32_bits(dma_addr));
- mhi_write_reg(mhi_cntrl, base, BHI_IMGSIZE, size);
- mhi_write_reg(mhi_cntrl, base, BHI_IMGTXDB, session_id);
- read_unlock_bh(pm_lock);
-
- /* Wait for the image download to complete */
- ret = wait_event_timeout(mhi_cntrl->state_event,
- MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state) ||
- mhi_read_reg_field(mhi_cntrl, base, BHI_STATUS,
- BHI_STATUS_MASK, BHI_STATUS_SHIFT,
- &tx_status) || tx_status,
- msecs_to_jiffies(mhi_cntrl->timeout_ms));
- if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state))
- goto invalid_pm_state;
-
- if (tx_status == BHI_STATUS_ERROR) {
- dev_err(dev, "Image transfer failed\n");
- read_lock_bh(pm_lock);
- if (MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state)) {
- for (i = 0; error_reg[i].name; i++) {
- ret = mhi_read_reg(mhi_cntrl, base,
- error_reg[i].offset, &val);
- if (ret)
- break;
- dev_err(dev, "Reg: %s value: 0x%x\n",
- error_reg[i].name, val);
- }
- }
- read_unlock_bh(pm_lock);
- goto invalid_pm_state;
- }
-
- return (!ret) ? -ETIMEDOUT : 0;
-
-invalid_pm_state:
-
- return -EIO;
-}
-
-void mhi_free_bhie_table(struct mhi_controller *mhi_cntrl,
- struct image_info *image_info)
-{
- int i;
- struct mhi_buf *mhi_buf = image_info->mhi_buf;
-
- for (i = 0; i < image_info->entries; i++, mhi_buf++)
- mhi_free_coherent(mhi_cntrl, mhi_buf->len, mhi_buf->buf,
- mhi_buf->dma_addr);
-
- kfree(image_info->mhi_buf);
- kfree(image_info);
-}
-
-int mhi_alloc_bhie_table(struct mhi_controller *mhi_cntrl,
- struct image_info **image_info,
- size_t alloc_size)
-{
- size_t seg_size = mhi_cntrl->seg_len;
- int segments = DIV_ROUND_UP(alloc_size, seg_size) + 1;
- int i;
- struct image_info *img_info;
- struct mhi_buf *mhi_buf;
-
- img_info = kzalloc(sizeof(*img_info), GFP_KERNEL);
- if (!img_info)
- return -ENOMEM;
-
- /* Allocate memory for entries */
- img_info->mhi_buf = kcalloc(segments, sizeof(*img_info->mhi_buf),
- GFP_KERNEL);
- if (!img_info->mhi_buf)
- goto error_alloc_mhi_buf;
-
- /* Allocate and populate vector table */
- mhi_buf = img_info->mhi_buf;
- for (i = 0; i < segments; i++, mhi_buf++) {
- size_t vec_size = seg_size;
-
- /* Vector table is the last entry */
- if (i == segments - 1)
- vec_size = sizeof(struct bhi_vec_entry) * i;
-
- mhi_buf->len = vec_size;
- mhi_buf->buf = mhi_alloc_coherent(mhi_cntrl, vec_size,
- &mhi_buf->dma_addr,
- GFP_KERNEL);
- if (!mhi_buf->buf)
- goto error_alloc_segment;
- }
-
- img_info->bhi_vec = img_info->mhi_buf[segments - 1].buf;
- img_info->entries = segments;
- *image_info = img_info;
-
- return 0;
-
-error_alloc_segment:
- for (--i, --mhi_buf; i >= 0; i--, mhi_buf--)
- mhi_free_coherent(mhi_cntrl, mhi_buf->len, mhi_buf->buf,
- mhi_buf->dma_addr);
-
-error_alloc_mhi_buf:
- kfree(img_info);
-
- return -ENOMEM;
-}
-
-static void mhi_firmware_copy(struct mhi_controller *mhi_cntrl,
- const struct firmware *firmware,
- struct image_info *img_info)
-{
- size_t remainder = firmware->size;
- size_t to_cpy;
- const u8 *buf = firmware->data;
- int i = 0;
- struct mhi_buf *mhi_buf = img_info->mhi_buf;
- struct bhi_vec_entry *bhi_vec = img_info->bhi_vec;
-
- while (remainder) {
- to_cpy = min(remainder, mhi_buf->len);
- memcpy(mhi_buf->buf, buf, to_cpy);
- bhi_vec->dma_addr = mhi_buf->dma_addr;
- bhi_vec->size = to_cpy;
-
- buf += to_cpy;
- remainder -= to_cpy;
- i++;
- bhi_vec++;
- mhi_buf++;
- }
-}
-
-void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl)
-{
- const struct firmware *firmware = NULL;
- struct image_info *image_info;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- const char *fw_name;
- void *buf;
- dma_addr_t dma_addr;
- size_t size;
- int i, ret;
-
- if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
- dev_err(dev, "Device MHI is not in valid state\n");
- return;
- }
-
- /* save hardware info from BHI */
- ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_SERIALNU,
- &mhi_cntrl->serial_number);
- if (ret)
- dev_err(dev, "Could not capture serial number via BHI\n");
-
- for (i = 0; i < ARRAY_SIZE(mhi_cntrl->oem_pk_hash); i++) {
- ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_OEMPKHASH(i),
- &mhi_cntrl->oem_pk_hash[i]);
- if (ret) {
- dev_err(dev, "Could not capture OEM PK HASH via BHI\n");
- break;
- }
- }
-
- /* If device is in pass through, do reset to ready state transition */
- if (mhi_cntrl->ee == MHI_EE_PTHRU)
- goto fw_load_ee_pthru;
-
- fw_name = (mhi_cntrl->ee == MHI_EE_EDL) ?
- mhi_cntrl->edl_image : mhi_cntrl->fw_image;
-
- if (!fw_name || (mhi_cntrl->fbc_download && (!mhi_cntrl->sbl_size ||
- !mhi_cntrl->seg_len))) {
- dev_err(dev,
- "No firmware image defined or !sbl_size || !seg_len\n");
- return;
- }
-
- ret = request_firmware(&firmware, fw_name, dev);
- if (ret) {
- dev_err(dev, "Error loading firmware: %d\n", ret);
- return;
- }
-
- size = (mhi_cntrl->fbc_download) ? mhi_cntrl->sbl_size : firmware->size;
-
- /* SBL size provided is maximum size, not necessarily the image size */
- if (size > firmware->size)
- size = firmware->size;
-
- buf = mhi_alloc_coherent(mhi_cntrl, size, &dma_addr, GFP_KERNEL);
- if (!buf) {
- release_firmware(firmware);
- return;
- }
-
- /* Download SBL image */
- memcpy(buf, firmware->data, size);
- ret = mhi_fw_load_sbl(mhi_cntrl, dma_addr, size);
- mhi_free_coherent(mhi_cntrl, size, buf, dma_addr);
-
- if (!mhi_cntrl->fbc_download || ret || mhi_cntrl->ee == MHI_EE_EDL)
- release_firmware(firmware);
-
- /* Error or in EDL mode, we're done */
- if (ret) {
- dev_err(dev, "MHI did not load SBL, ret:%d\n", ret);
- return;
- }
-
- if (mhi_cntrl->ee == MHI_EE_EDL)
- return;
-
- write_lock_irq(&mhi_cntrl->pm_lock);
- mhi_cntrl->dev_state = MHI_STATE_RESET;
- write_unlock_irq(&mhi_cntrl->pm_lock);
-
- /*
- * If we're doing fbc, populate vector tables while
- * device transitioning into MHI READY state
- */
- if (mhi_cntrl->fbc_download) {
- ret = mhi_alloc_bhie_table(mhi_cntrl, &mhi_cntrl->fbc_image,
- firmware->size);
- if (ret)
- goto error_alloc_fw_table;
-
- /* Load the firmware into BHIE vec table */
- mhi_firmware_copy(mhi_cntrl, firmware, mhi_cntrl->fbc_image);
- }
-
-fw_load_ee_pthru:
- /* Transitioning into MHI RESET->READY state */
- ret = mhi_ready_state_transition(mhi_cntrl);
-
- if (!mhi_cntrl->fbc_download)
- return;
-
- if (ret) {
- dev_err(dev, "MHI did not enter READY state\n");
- goto error_read;
- }
-
- /* Wait for the SBL event */
- ret = wait_event_timeout(mhi_cntrl->state_event,
- mhi_cntrl->ee == MHI_EE_SBL ||
- MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state),
- msecs_to_jiffies(mhi_cntrl->timeout_ms));
-
- if (!ret || MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
- dev_err(dev, "MHI did not enter SBL\n");
- goto error_read;
- }
-
- /* Start full firmware image download */
- image_info = mhi_cntrl->fbc_image;
- ret = mhi_fw_load_amss(mhi_cntrl,
- /* Vector table is the last entry */
- &image_info->mhi_buf[image_info->entries - 1]);
- if (ret)
- dev_err(dev, "MHI did not load AMSS, ret:%d\n", ret);
-
- release_firmware(firmware);
-
- return;
-
-error_read:
- mhi_free_bhie_table(mhi_cntrl, mhi_cntrl->fbc_image);
- mhi_cntrl->fbc_image = NULL;
-
-error_alloc_fw_table:
- release_firmware(firmware);
-}
diff --git a/drivers/bus/mhi/core/debugfs.c b/drivers/bus/mhi/core/debugfs.c
deleted file mode 100644
index 3a48801e01f4..000000000000
--- a/drivers/bus/mhi/core/debugfs.c
+++ /dev/null
@@ -1,411 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (c) 2020, The Linux Foundation. All rights reserved.
- *
- */
-
-#include <linux/debugfs.h>
-#include <linux/device.h>
-#include <linux/interrupt.h>
-#include <linux/list.h>
-#include <linux/mhi.h>
-#include <linux/module.h>
-#include "internal.h"
-
-static int mhi_debugfs_states_show(struct seq_file *m, void *d)
-{
- struct mhi_controller *mhi_cntrl = m->private;
-
- /* states */
- seq_printf(m, "PM state: %s Device: %s MHI state: %s EE: %s wake: %s\n",
- to_mhi_pm_state_str(mhi_cntrl->pm_state),
- mhi_is_active(mhi_cntrl) ? "Active" : "Inactive",
- TO_MHI_STATE_STR(mhi_cntrl->dev_state),
- TO_MHI_EXEC_STR(mhi_cntrl->ee),
- mhi_cntrl->wake_set ? "true" : "false");
-
- /* counters */
- seq_printf(m, "M0: %u M2: %u M3: %u", mhi_cntrl->M0, mhi_cntrl->M2,
- mhi_cntrl->M3);
-
- seq_printf(m, " device wake: %u pending packets: %u\n",
- atomic_read(&mhi_cntrl->dev_wake),
- atomic_read(&mhi_cntrl->pending_pkts));
-
- return 0;
-}
-
-static int mhi_debugfs_events_show(struct seq_file *m, void *d)
-{
- struct mhi_controller *mhi_cntrl = m->private;
- struct mhi_event *mhi_event;
- struct mhi_event_ctxt *er_ctxt;
- int i;
-
- if (!mhi_is_active(mhi_cntrl)) {
- seq_puts(m, "Device not ready\n");
- return -ENODEV;
- }
-
- er_ctxt = mhi_cntrl->mhi_ctxt->er_ctxt;
- mhi_event = mhi_cntrl->mhi_event;
- for (i = 0; i < mhi_cntrl->total_ev_rings;
- i++, er_ctxt++, mhi_event++) {
- struct mhi_ring *ring = &mhi_event->ring;
-
- if (mhi_event->offload_ev) {
- seq_printf(m, "Index: %d is an offload event ring\n",
- i);
- continue;
- }
-
- seq_printf(m, "Index: %d intmod count: %lu time: %lu",
- i, (er_ctxt->intmod & EV_CTX_INTMODC_MASK) >>
- EV_CTX_INTMODC_SHIFT,
- (er_ctxt->intmod & EV_CTX_INTMODT_MASK) >>
- EV_CTX_INTMODT_SHIFT);
-
- seq_printf(m, " base: 0x%0llx len: 0x%llx", er_ctxt->rbase,
- er_ctxt->rlen);
-
- seq_printf(m, " rp: 0x%llx wp: 0x%llx", er_ctxt->rp,
- er_ctxt->wp);
-
- seq_printf(m, " local rp: 0x%pK db: 0x%pad\n", ring->rp,
- &mhi_event->db_cfg.db_val);
- }
-
- return 0;
-}
-
-static int mhi_debugfs_channels_show(struct seq_file *m, void *d)
-{
- struct mhi_controller *mhi_cntrl = m->private;
- struct mhi_chan *mhi_chan;
- struct mhi_chan_ctxt *chan_ctxt;
- int i;
-
- if (!mhi_is_active(mhi_cntrl)) {
- seq_puts(m, "Device not ready\n");
- return -ENODEV;
- }
-
- mhi_chan = mhi_cntrl->mhi_chan;
- chan_ctxt = mhi_cntrl->mhi_ctxt->chan_ctxt;
- for (i = 0; i < mhi_cntrl->max_chan; i++, chan_ctxt++, mhi_chan++) {
- struct mhi_ring *ring = &mhi_chan->tre_ring;
-
- if (mhi_chan->offload_ch) {
- seq_printf(m, "%s(%u) is an offload channel\n",
- mhi_chan->name, mhi_chan->chan);
- continue;
- }
-
- if (!mhi_chan->mhi_dev)
- continue;
-
- seq_printf(m,
- "%s(%u) state: 0x%lx brstmode: 0x%lx pollcfg: 0x%lx",
- mhi_chan->name, mhi_chan->chan, (chan_ctxt->chcfg &
- CHAN_CTX_CHSTATE_MASK) >> CHAN_CTX_CHSTATE_SHIFT,
- (chan_ctxt->chcfg & CHAN_CTX_BRSTMODE_MASK) >>
- CHAN_CTX_BRSTMODE_SHIFT, (chan_ctxt->chcfg &
- CHAN_CTX_POLLCFG_MASK) >> CHAN_CTX_POLLCFG_SHIFT);
-
- seq_printf(m, " type: 0x%x event ring: %u", chan_ctxt->chtype,
- chan_ctxt->erindex);
-
- seq_printf(m, " base: 0x%llx len: 0x%llx rp: 0x%llx wp: 0x%llx",
- chan_ctxt->rbase, chan_ctxt->rlen, chan_ctxt->rp,
- chan_ctxt->wp);
-
- seq_printf(m, " local rp: 0x%pK local wp: 0x%pK db: 0x%pad\n",
- ring->rp, ring->wp,
- &mhi_chan->db_cfg.db_val);
- }
-
- return 0;
-}
-
-static int mhi_device_info_show(struct device *dev, void *data)
-{
- struct mhi_device *mhi_dev;
-
- if (dev->bus != &mhi_bus_type)
- return 0;
-
- mhi_dev = to_mhi_device(dev);
-
- seq_printf((struct seq_file *)data, "%s: type: %s dev_wake: %u",
- mhi_dev->name, mhi_dev->dev_type ? "Controller" : "Transfer",
- mhi_dev->dev_wake);
-
- /* for transfer device types only */
- if (mhi_dev->dev_type == MHI_DEVICE_XFER)
- seq_printf((struct seq_file *)data, " channels: %u(UL)/%u(DL)",
- mhi_dev->ul_chan_id, mhi_dev->dl_chan_id);
-
- seq_puts((struct seq_file *)data, "\n");
-
- return 0;
-}
-
-static int mhi_debugfs_devices_show(struct seq_file *m, void *d)
-{
- struct mhi_controller *mhi_cntrl = m->private;
-
- if (!mhi_is_active(mhi_cntrl)) {
- seq_puts(m, "Device not ready\n");
- return -ENODEV;
- }
-
- device_for_each_child(mhi_cntrl->cntrl_dev, m, mhi_device_info_show);
-
- return 0;
-}
-
-static int mhi_debugfs_regdump_show(struct seq_file *m, void *d)
-{
- struct mhi_controller *mhi_cntrl = m->private;
- enum mhi_state state;
- enum mhi_ee_type ee;
- int i, ret = -EIO;
- u32 val;
- void __iomem *mhi_base = mhi_cntrl->regs;
- void __iomem *bhi_base = mhi_cntrl->bhi;
- void __iomem *bhie_base = mhi_cntrl->bhie;
- void __iomem *wake_db = mhi_cntrl->wake_db;
- struct {
- const char *name;
- int offset;
- void __iomem *base;
- } regs[] = {
- { "MHI_REGLEN", MHIREGLEN, mhi_base},
- { "MHI_VER", MHIVER, mhi_base},
- { "MHI_CFG", MHICFG, mhi_base},
- { "MHI_CTRL", MHICTRL, mhi_base},
- { "MHI_STATUS", MHISTATUS, mhi_base},
- { "MHI_WAKE_DB", 0, wake_db},
- { "BHI_EXECENV", BHI_EXECENV, bhi_base},
- { "BHI_STATUS", BHI_STATUS, bhi_base},
- { "BHI_ERRCODE", BHI_ERRCODE, bhi_base},
- { "BHI_ERRDBG1", BHI_ERRDBG1, bhi_base},
- { "BHI_ERRDBG2", BHI_ERRDBG2, bhi_base},
- { "BHI_ERRDBG3", BHI_ERRDBG3, bhi_base},
- { "BHIE_TXVEC_DB", BHIE_TXVECDB_OFFS, bhie_base},
- { "BHIE_TXVEC_STATUS", BHIE_TXVECSTATUS_OFFS, bhie_base},
- { "BHIE_RXVEC_DB", BHIE_RXVECDB_OFFS, bhie_base},
- { "BHIE_RXVEC_STATUS", BHIE_RXVECSTATUS_OFFS, bhie_base},
- { NULL },
- };
-
- if (!MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state))
- return ret;
-
- seq_printf(m, "Host PM state: %s Device state: %s EE: %s\n",
- to_mhi_pm_state_str(mhi_cntrl->pm_state),
- TO_MHI_STATE_STR(mhi_cntrl->dev_state),
- TO_MHI_EXEC_STR(mhi_cntrl->ee));
-
- state = mhi_get_mhi_state(mhi_cntrl);
- ee = mhi_get_exec_env(mhi_cntrl);
- seq_printf(m, "Device EE: %s state: %s\n", TO_MHI_EXEC_STR(ee),
- TO_MHI_STATE_STR(state));
-
- for (i = 0; regs[i].name; i++) {
- if (!regs[i].base)
- continue;
- ret = mhi_read_reg(mhi_cntrl, regs[i].base, regs[i].offset,
- &val);
- if (ret)
- continue;
-
- seq_printf(m, "%s: 0x%x\n", regs[i].name, val);
- }
-
- return 0;
-}
-
-static int mhi_debugfs_device_wake_show(struct seq_file *m, void *d)
-{
- struct mhi_controller *mhi_cntrl = m->private;
- struct mhi_device *mhi_dev = mhi_cntrl->mhi_dev;
-
- if (!mhi_is_active(mhi_cntrl)) {
- seq_puts(m, "Device not ready\n");
- return -ENODEV;
- }
-
- seq_printf(m,
- "Wake count: %d\n%s\n", mhi_dev->dev_wake,
- "Usage: echo get/put > device_wake to vote/unvote for M0");
-
- return 0;
-}
-
-static ssize_t mhi_debugfs_device_wake_write(struct file *file,
- const char __user *ubuf,
- size_t count, loff_t *ppos)
-{
- struct seq_file *m = file->private_data;
- struct mhi_controller *mhi_cntrl = m->private;
- struct mhi_device *mhi_dev = mhi_cntrl->mhi_dev;
- char buf[16];
- int ret = -EINVAL;
-
- if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
- return -EFAULT;
-
- if (!strncmp(buf, "get", 3)) {
- ret = mhi_device_get_sync(mhi_dev);
- } else if (!strncmp(buf, "put", 3)) {
- mhi_device_put(mhi_dev);
- ret = 0;
- }
-
- return ret ? ret : count;
-}
-
-static int mhi_debugfs_timeout_ms_show(struct seq_file *m, void *d)
-{
- struct mhi_controller *mhi_cntrl = m->private;
-
- seq_printf(m, "%u ms\n", mhi_cntrl->timeout_ms);
-
- return 0;
-}
-
-static ssize_t mhi_debugfs_timeout_ms_write(struct file *file,
- const char __user *ubuf,
- size_t count, loff_t *ppos)
-{
- struct seq_file *m = file->private_data;
- struct mhi_controller *mhi_cntrl = m->private;
- u32 timeout_ms;
-
- if (kstrtou32_from_user(ubuf, count, 0, &timeout_ms))
- return -EINVAL;
-
- mhi_cntrl->timeout_ms = timeout_ms;
-
- return count;
-}
-
-static int mhi_debugfs_states_open(struct inode *inode, struct file *fp)
-{
- return single_open(fp, mhi_debugfs_states_show, inode->i_private);
-}
-
-static int mhi_debugfs_events_open(struct inode *inode, struct file *fp)
-{
- return single_open(fp, mhi_debugfs_events_show, inode->i_private);
-}
-
-static int mhi_debugfs_channels_open(struct inode *inode, struct file *fp)
-{
- return single_open(fp, mhi_debugfs_channels_show, inode->i_private);
-}
-
-static int mhi_debugfs_devices_open(struct inode *inode, struct file *fp)
-{
- return single_open(fp, mhi_debugfs_devices_show, inode->i_private);
-}
-
-static int mhi_debugfs_regdump_open(struct inode *inode, struct file *fp)
-{
- return single_open(fp, mhi_debugfs_regdump_show, inode->i_private);
-}
-
-static int mhi_debugfs_device_wake_open(struct inode *inode, struct file *fp)
-{
- return single_open(fp, mhi_debugfs_device_wake_show, inode->i_private);
-}
-
-static int mhi_debugfs_timeout_ms_open(struct inode *inode, struct file *fp)
-{
- return single_open(fp, mhi_debugfs_timeout_ms_show, inode->i_private);
-}
-
-static const struct file_operations debugfs_states_fops = {
- .open = mhi_debugfs_states_open,
- .release = single_release,
- .read = seq_read,
-};
-
-static const struct file_operations debugfs_events_fops = {
- .open = mhi_debugfs_events_open,
- .release = single_release,
- .read = seq_read,
-};
-
-static const struct file_operations debugfs_channels_fops = {
- .open = mhi_debugfs_channels_open,
- .release = single_release,
- .read = seq_read,
-};
-
-static const struct file_operations debugfs_devices_fops = {
- .open = mhi_debugfs_devices_open,
- .release = single_release,
- .read = seq_read,
-};
-
-static const struct file_operations debugfs_regdump_fops = {
- .open = mhi_debugfs_regdump_open,
- .release = single_release,
- .read = seq_read,
-};
-
-static const struct file_operations debugfs_device_wake_fops = {
- .open = mhi_debugfs_device_wake_open,
- .write = mhi_debugfs_device_wake_write,
- .release = single_release,
- .read = seq_read,
-};
-
-static const struct file_operations debugfs_timeout_ms_fops = {
- .open = mhi_debugfs_timeout_ms_open,
- .write = mhi_debugfs_timeout_ms_write,
- .release = single_release,
- .read = seq_read,
-};
-
-static struct dentry *mhi_debugfs_root;
-
-void mhi_create_debugfs(struct mhi_controller *mhi_cntrl)
-{
- mhi_cntrl->debugfs_dentry =
- debugfs_create_dir(dev_name(mhi_cntrl->cntrl_dev),
- mhi_debugfs_root);
-
- debugfs_create_file("states", 0444, mhi_cntrl->debugfs_dentry,
- mhi_cntrl, &debugfs_states_fops);
- debugfs_create_file("events", 0444, mhi_cntrl->debugfs_dentry,
- mhi_cntrl, &debugfs_events_fops);
- debugfs_create_file("channels", 0444, mhi_cntrl->debugfs_dentry,
- mhi_cntrl, &debugfs_channels_fops);
- debugfs_create_file("devices", 0444, mhi_cntrl->debugfs_dentry,
- mhi_cntrl, &debugfs_devices_fops);
- debugfs_create_file("regdump", 0444, mhi_cntrl->debugfs_dentry,
- mhi_cntrl, &debugfs_regdump_fops);
- debugfs_create_file("device_wake", 0644, mhi_cntrl->debugfs_dentry,
- mhi_cntrl, &debugfs_device_wake_fops);
- debugfs_create_file("timeout_ms", 0644, mhi_cntrl->debugfs_dentry,
- mhi_cntrl, &debugfs_timeout_ms_fops);
-}
-
-void mhi_destroy_debugfs(struct mhi_controller *mhi_cntrl)
-{
- debugfs_remove_recursive(mhi_cntrl->debugfs_dentry);
- mhi_cntrl->debugfs_dentry = NULL;
-}
-
-void mhi_debugfs_init(void)
-{
- mhi_debugfs_root = debugfs_create_dir(mhi_bus_type.name, NULL);
-}
-
-void mhi_debugfs_exit(void)
-{
- debugfs_remove_recursive(mhi_debugfs_root);
-}
diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
deleted file mode 100644
index 0d0386f67ffe..000000000000
--- a/drivers/bus/mhi/core/init.c
+++ /dev/null
@@ -1,1375 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
- *
- */
-
-#include <linux/debugfs.h>
-#include <linux/device.h>
-#include <linux/dma-direction.h>
-#include <linux/dma-mapping.h>
-#include <linux/interrupt.h>
-#include <linux/list.h>
-#include <linux/mhi.h>
-#include <linux/mod_devicetable.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-#include <linux/wait.h>
-#include "internal.h"
-
-const char * const mhi_ee_str[MHI_EE_MAX] = {
- [MHI_EE_PBL] = "PBL",
- [MHI_EE_SBL] = "SBL",
- [MHI_EE_AMSS] = "AMSS",
- [MHI_EE_RDDM] = "RDDM",
- [MHI_EE_WFW] = "WFW",
- [MHI_EE_PTHRU] = "PASS THRU",
- [MHI_EE_EDL] = "EDL",
- [MHI_EE_DISABLE_TRANSITION] = "DISABLE",
- [MHI_EE_NOT_SUPPORTED] = "NOT SUPPORTED",
-};
-
-const char * const dev_state_tran_str[DEV_ST_TRANSITION_MAX] = {
- [DEV_ST_TRANSITION_PBL] = "PBL",
- [DEV_ST_TRANSITION_READY] = "READY",
- [DEV_ST_TRANSITION_SBL] = "SBL",
- [DEV_ST_TRANSITION_MISSION_MODE] = "MISSION_MODE",
- [DEV_ST_TRANSITION_SYS_ERR] = "SYS_ERR",
- [DEV_ST_TRANSITION_DISABLE] = "DISABLE",
-};
-
-const char * const mhi_state_str[MHI_STATE_MAX] = {
- [MHI_STATE_RESET] = "RESET",
- [MHI_STATE_READY] = "READY",
- [MHI_STATE_M0] = "M0",
- [MHI_STATE_M1] = "M1",
- [MHI_STATE_M2] = "M2",
- [MHI_STATE_M3] = "M3",
- [MHI_STATE_M3_FAST] = "M3_FAST",
- [MHI_STATE_BHI] = "BHI",
- [MHI_STATE_SYS_ERR] = "SYS_ERR",
-};
-
-static const char * const mhi_pm_state_str[] = {
- [MHI_PM_STATE_DISABLE] = "DISABLE",
- [MHI_PM_STATE_POR] = "POR",
- [MHI_PM_STATE_M0] = "M0",
- [MHI_PM_STATE_M2] = "M2",
- [MHI_PM_STATE_M3_ENTER] = "M?->M3",
- [MHI_PM_STATE_M3] = "M3",
- [MHI_PM_STATE_M3_EXIT] = "M3->M0",
- [MHI_PM_STATE_FW_DL_ERR] = "FW DL Error",
- [MHI_PM_STATE_SYS_ERR_DETECT] = "SYS_ERR Detect",
- [MHI_PM_STATE_SYS_ERR_PROCESS] = "SYS_ERR Process",
- [MHI_PM_STATE_SHUTDOWN_PROCESS] = "SHUTDOWN Process",
- [MHI_PM_STATE_LD_ERR_FATAL_DETECT] = "LD or Error Fatal Detect",
-};
-
-const char *to_mhi_pm_state_str(enum mhi_pm_state state)
-{
- int index = find_last_bit((unsigned long *)&state, 32);
-
- if (index >= ARRAY_SIZE(mhi_pm_state_str))
- return "Invalid State";
-
- return mhi_pm_state_str[index];
-}
-
-static ssize_t serial_number_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct mhi_device *mhi_dev = to_mhi_device(dev);
- struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
-
- return snprintf(buf, PAGE_SIZE, "Serial Number: %u\n",
- mhi_cntrl->serial_number);
-}
-static DEVICE_ATTR_RO(serial_number);
-
-static ssize_t oem_pk_hash_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct mhi_device *mhi_dev = to_mhi_device(dev);
- struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
- int i, cnt = 0;
-
- for (i = 0; i < ARRAY_SIZE(mhi_cntrl->oem_pk_hash); i++)
- cnt += snprintf(buf + cnt, PAGE_SIZE - cnt,
- "OEMPKHASH[%d]: 0x%x\n", i,
- mhi_cntrl->oem_pk_hash[i]);
-
- return cnt;
-}
-static DEVICE_ATTR_RO(oem_pk_hash);
-
-static struct attribute *mhi_dev_attrs[] = {
- &dev_attr_serial_number.attr,
- &dev_attr_oem_pk_hash.attr,
- NULL,
-};
-ATTRIBUTE_GROUPS(mhi_dev);
-
-/* MHI protocol requires the transfer ring to be aligned with ring length */
-static int mhi_alloc_aligned_ring(struct mhi_controller *mhi_cntrl,
- struct mhi_ring *ring,
- u64 len)
-{
- ring->alloc_size = len + (len - 1);
- ring->pre_aligned = mhi_alloc_coherent(mhi_cntrl, ring->alloc_size,
- &ring->dma_handle, GFP_KERNEL);
- if (!ring->pre_aligned)
- return -ENOMEM;
-
- ring->iommu_base = (ring->dma_handle + (len - 1)) & ~(len - 1);
- ring->base = ring->pre_aligned + (ring->iommu_base - ring->dma_handle);
-
- return 0;
-}
-
-void mhi_deinit_free_irq(struct mhi_controller *mhi_cntrl)
-{
- int i;
- struct mhi_event *mhi_event = mhi_cntrl->mhi_event;
-
- for (i = 0; i < mhi_cntrl->total_ev_rings; i++, mhi_event++) {
- if (mhi_event->offload_ev)
- continue;
-
- free_irq(mhi_cntrl->irq[mhi_event->irq], mhi_event);
- }
-
- free_irq(mhi_cntrl->irq[0], mhi_cntrl);
-}
-
-int mhi_init_irq_setup(struct mhi_controller *mhi_cntrl)
-{
- struct mhi_event *mhi_event = mhi_cntrl->mhi_event;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- int i, ret;
-
- /* Setup BHI_INTVEC IRQ */
- ret = request_threaded_irq(mhi_cntrl->irq[0], mhi_intvec_handler,
- mhi_intvec_threaded_handler,
- IRQF_SHARED | IRQF_NO_SUSPEND,
- "bhi", mhi_cntrl);
- if (ret)
- return ret;
-
- for (i = 0; i < mhi_cntrl->total_ev_rings; i++, mhi_event++) {
- if (mhi_event->offload_ev)
- continue;
-
- if (mhi_event->irq >= mhi_cntrl->nr_irqs) {
- dev_err(dev, "irq %d not available for event ring\n",
- mhi_event->irq);
- ret = -EINVAL;
- goto error_request;
- }
-
- ret = request_irq(mhi_cntrl->irq[mhi_event->irq],
- mhi_irq_handler,
- IRQF_SHARED | IRQF_NO_SUSPEND,
- "mhi", mhi_event);
- if (ret) {
- dev_err(dev, "Error requesting irq:%d for ev:%d\n",
- mhi_cntrl->irq[mhi_event->irq], i);
- goto error_request;
- }
- }
-
- return 0;
-
-error_request:
- for (--i, --mhi_event; i >= 0; i--, mhi_event--) {
- if (mhi_event->offload_ev)
- continue;
-
- free_irq(mhi_cntrl->irq[mhi_event->irq], mhi_event);
- }
- free_irq(mhi_cntrl->irq[0], mhi_cntrl);
-
- return ret;
-}
-
-void mhi_deinit_dev_ctxt(struct mhi_controller *mhi_cntrl)
-{
- int i;
- struct mhi_ctxt *mhi_ctxt = mhi_cntrl->mhi_ctxt;
- struct mhi_cmd *mhi_cmd;
- struct mhi_event *mhi_event;
- struct mhi_ring *ring;
-
- mhi_cmd = mhi_cntrl->mhi_cmd;
- for (i = 0; i < NR_OF_CMD_RINGS; i++, mhi_cmd++) {
- ring = &mhi_cmd->ring;
- mhi_free_coherent(mhi_cntrl, ring->alloc_size,
- ring->pre_aligned, ring->dma_handle);
- ring->base = NULL;
- ring->iommu_base = 0;
- }
-
- mhi_free_coherent(mhi_cntrl,
- sizeof(*mhi_ctxt->cmd_ctxt) * NR_OF_CMD_RINGS,
- mhi_ctxt->cmd_ctxt, mhi_ctxt->cmd_ctxt_addr);
-
- mhi_event = mhi_cntrl->mhi_event;
- for (i = 0; i < mhi_cntrl->total_ev_rings; i++, mhi_event++) {
- if (mhi_event->offload_ev)
- continue;
-
- ring = &mhi_event->ring;
- mhi_free_coherent(mhi_cntrl, ring->alloc_size,
- ring->pre_aligned, ring->dma_handle);
- ring->base = NULL;
- ring->iommu_base = 0;
- }
-
- mhi_free_coherent(mhi_cntrl, sizeof(*mhi_ctxt->er_ctxt) *
- mhi_cntrl->total_ev_rings, mhi_ctxt->er_ctxt,
- mhi_ctxt->er_ctxt_addr);
-
- mhi_free_coherent(mhi_cntrl, sizeof(*mhi_ctxt->chan_ctxt) *
- mhi_cntrl->max_chan, mhi_ctxt->chan_ctxt,
- mhi_ctxt->chan_ctxt_addr);
-
- kfree(mhi_ctxt);
- mhi_cntrl->mhi_ctxt = NULL;
-}
-
-int mhi_init_dev_ctxt(struct mhi_controller *mhi_cntrl)
-{
- struct mhi_ctxt *mhi_ctxt;
- struct mhi_chan_ctxt *chan_ctxt;
- struct mhi_event_ctxt *er_ctxt;
- struct mhi_cmd_ctxt *cmd_ctxt;
- struct mhi_chan *mhi_chan;
- struct mhi_event *mhi_event;
- struct mhi_cmd *mhi_cmd;
- u32 tmp;
- int ret = -ENOMEM, i;
-
- atomic_set(&mhi_cntrl->dev_wake, 0);
- atomic_set(&mhi_cntrl->pending_pkts, 0);
-
- mhi_ctxt = kzalloc(sizeof(*mhi_ctxt), GFP_KERNEL);
- if (!mhi_ctxt)
- return -ENOMEM;
-
- /* Setup channel ctxt */
- mhi_ctxt->chan_ctxt = mhi_alloc_coherent(mhi_cntrl,
- sizeof(*mhi_ctxt->chan_ctxt) *
- mhi_cntrl->max_chan,
- &mhi_ctxt->chan_ctxt_addr,
- GFP_KERNEL);
- if (!mhi_ctxt->chan_ctxt)
- goto error_alloc_chan_ctxt;
-
- mhi_chan = mhi_cntrl->mhi_chan;
- chan_ctxt = mhi_ctxt->chan_ctxt;
- for (i = 0; i < mhi_cntrl->max_chan; i++, chan_ctxt++, mhi_chan++) {
- /* Skip if it is an offload channel */
- if (mhi_chan->offload_ch)
- continue;
-
- tmp = chan_ctxt->chcfg;
- tmp &= ~CHAN_CTX_CHSTATE_MASK;
- tmp |= (MHI_CH_STATE_DISABLED << CHAN_CTX_CHSTATE_SHIFT);
- tmp &= ~CHAN_CTX_BRSTMODE_MASK;
- tmp |= (mhi_chan->db_cfg.brstmode << CHAN_CTX_BRSTMODE_SHIFT);
- tmp &= ~CHAN_CTX_POLLCFG_MASK;
- tmp |= (mhi_chan->db_cfg.pollcfg << CHAN_CTX_POLLCFG_SHIFT);
- chan_ctxt->chcfg = tmp;
-
- chan_ctxt->chtype = mhi_chan->type;
- chan_ctxt->erindex = mhi_chan->er_index;
-
- mhi_chan->ch_state = MHI_CH_STATE_DISABLED;
- mhi_chan->tre_ring.db_addr = (void __iomem *)&chan_ctxt->wp;
- }
-
- /* Setup event context */
- mhi_ctxt->er_ctxt = mhi_alloc_coherent(mhi_cntrl,
- sizeof(*mhi_ctxt->er_ctxt) *
- mhi_cntrl->total_ev_rings,
- &mhi_ctxt->er_ctxt_addr,
- GFP_KERNEL);
- if (!mhi_ctxt->er_ctxt)
- goto error_alloc_er_ctxt;
-
- er_ctxt = mhi_ctxt->er_ctxt;
- mhi_event = mhi_cntrl->mhi_event;
- for (i = 0; i < mhi_cntrl->total_ev_rings; i++, er_ctxt++,
- mhi_event++) {
- struct mhi_ring *ring = &mhi_event->ring;
-
- /* Skip if it is an offload event */
- if (mhi_event->offload_ev)
- continue;
-
- tmp = er_ctxt->intmod;
- tmp &= ~EV_CTX_INTMODC_MASK;
- tmp &= ~EV_CTX_INTMODT_MASK;
- tmp |= (mhi_event->intmod << EV_CTX_INTMODT_SHIFT);
- er_ctxt->intmod = tmp;
-
- er_ctxt->ertype = MHI_ER_TYPE_VALID;
- er_ctxt->msivec = mhi_event->irq;
- mhi_event->db_cfg.db_mode = true;
-
- ring->el_size = sizeof(struct mhi_tre);
- ring->len = ring->el_size * ring->elements;
- ret = mhi_alloc_aligned_ring(mhi_cntrl, ring, ring->len);
- if (ret)
- goto error_alloc_er;
-
- /*
- * If the read pointer equals to the write pointer, then the
- * ring is empty
- */
- ring->rp = ring->wp = ring->base;
- er_ctxt->rbase = ring->iommu_base;
- er_ctxt->rp = er_ctxt->wp = er_ctxt->rbase;
- er_ctxt->rlen = ring->len;
- ring->ctxt_wp = &er_ctxt->wp;
- }
-
- /* Setup cmd context */
- ret = -ENOMEM;
- mhi_ctxt->cmd_ctxt = mhi_alloc_coherent(mhi_cntrl,
- sizeof(*mhi_ctxt->cmd_ctxt) *
- NR_OF_CMD_RINGS,
- &mhi_ctxt->cmd_ctxt_addr,
- GFP_KERNEL);
- if (!mhi_ctxt->cmd_ctxt)
- goto error_alloc_er;
-
- mhi_cmd = mhi_cntrl->mhi_cmd;
- cmd_ctxt = mhi_ctxt->cmd_ctxt;
- for (i = 0; i < NR_OF_CMD_RINGS; i++, mhi_cmd++, cmd_ctxt++) {
- struct mhi_ring *ring = &mhi_cmd->ring;
-
- ring->el_size = sizeof(struct mhi_tre);
- ring->elements = CMD_EL_PER_RING;
- ring->len = ring->el_size * ring->elements;
- ret = mhi_alloc_aligned_ring(mhi_cntrl, ring, ring->len);
- if (ret)
- goto error_alloc_cmd;
-
- ring->rp = ring->wp = ring->base;
- cmd_ctxt->rbase = ring->iommu_base;
- cmd_ctxt->rp = cmd_ctxt->wp = cmd_ctxt->rbase;
- cmd_ctxt->rlen = ring->len;
- ring->ctxt_wp = &cmd_ctxt->wp;
- }
-
- mhi_cntrl->mhi_ctxt = mhi_ctxt;
-
- return 0;
-
-error_alloc_cmd:
- for (--i, --mhi_cmd; i >= 0; i--, mhi_cmd--) {
- struct mhi_ring *ring = &mhi_cmd->ring;
-
- mhi_free_coherent(mhi_cntrl, ring->alloc_size,
- ring->pre_aligned, ring->dma_handle);
- }
- mhi_free_coherent(mhi_cntrl,
- sizeof(*mhi_ctxt->cmd_ctxt) * NR_OF_CMD_RINGS,
- mhi_ctxt->cmd_ctxt, mhi_ctxt->cmd_ctxt_addr);
- i = mhi_cntrl->total_ev_rings;
- mhi_event = mhi_cntrl->mhi_event + i;
-
-error_alloc_er:
- for (--i, --mhi_event; i >= 0; i--, mhi_event--) {
- struct mhi_ring *ring = &mhi_event->ring;
-
- if (mhi_event->offload_ev)
- continue;
-
- mhi_free_coherent(mhi_cntrl, ring->alloc_size,
- ring->pre_aligned, ring->dma_handle);
- }
- mhi_free_coherent(mhi_cntrl, sizeof(*mhi_ctxt->er_ctxt) *
- mhi_cntrl->total_ev_rings, mhi_ctxt->er_ctxt,
- mhi_ctxt->er_ctxt_addr);
-
-error_alloc_er_ctxt:
- mhi_free_coherent(mhi_cntrl, sizeof(*mhi_ctxt->chan_ctxt) *
- mhi_cntrl->max_chan, mhi_ctxt->chan_ctxt,
- mhi_ctxt->chan_ctxt_addr);
-
-error_alloc_chan_ctxt:
- kfree(mhi_ctxt);
-
- return ret;
-}
-
-int mhi_init_mmio(struct mhi_controller *mhi_cntrl)
-{
- u32 val;
- int i, ret;
- struct mhi_chan *mhi_chan;
- struct mhi_event *mhi_event;
- void __iomem *base = mhi_cntrl->regs;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- struct {
- u32 offset;
- u32 mask;
- u32 shift;
- u32 val;
- } reg_info[] = {
- {
- CCABAP_HIGHER, U32_MAX, 0,
- upper_32_bits(mhi_cntrl->mhi_ctxt->chan_ctxt_addr),
- },
- {
- CCABAP_LOWER, U32_MAX, 0,
- lower_32_bits(mhi_cntrl->mhi_ctxt->chan_ctxt_addr),
- },
- {
- ECABAP_HIGHER, U32_MAX, 0,
- upper_32_bits(mhi_cntrl->mhi_ctxt->er_ctxt_addr),
- },
- {
- ECABAP_LOWER, U32_MAX, 0,
- lower_32_bits(mhi_cntrl->mhi_ctxt->er_ctxt_addr),
- },
- {
- CRCBAP_HIGHER, U32_MAX, 0,
- upper_32_bits(mhi_cntrl->mhi_ctxt->cmd_ctxt_addr),
- },
- {
- CRCBAP_LOWER, U32_MAX, 0,
- lower_32_bits(mhi_cntrl->mhi_ctxt->cmd_ctxt_addr),
- },
- {
- MHICFG, MHICFG_NER_MASK, MHICFG_NER_SHIFT,
- mhi_cntrl->total_ev_rings,
- },
- {
- MHICFG, MHICFG_NHWER_MASK, MHICFG_NHWER_SHIFT,
- mhi_cntrl->hw_ev_rings,
- },
- {
- MHICTRLBASE_HIGHER, U32_MAX, 0,
- upper_32_bits(mhi_cntrl->iova_start),
- },
- {
- MHICTRLBASE_LOWER, U32_MAX, 0,
- lower_32_bits(mhi_cntrl->iova_start),
- },
- {
- MHIDATABASE_HIGHER, U32_MAX, 0,
- upper_32_bits(mhi_cntrl->iova_start),
- },
- {
- MHIDATABASE_LOWER, U32_MAX, 0,
- lower_32_bits(mhi_cntrl->iova_start),
- },
- {
- MHICTRLLIMIT_HIGHER, U32_MAX, 0,
- upper_32_bits(mhi_cntrl->iova_stop),
- },
- {
- MHICTRLLIMIT_LOWER, U32_MAX, 0,
- lower_32_bits(mhi_cntrl->iova_stop),
- },
- {
- MHIDATALIMIT_HIGHER, U32_MAX, 0,
- upper_32_bits(mhi_cntrl->iova_stop),
- },
- {
- MHIDATALIMIT_LOWER, U32_MAX, 0,
- lower_32_bits(mhi_cntrl->iova_stop),
- },
- { 0, 0, 0 }
- };
-
- dev_dbg(dev, "Initializing MHI registers\n");
-
- /* Read channel db offset */
- ret = mhi_read_reg_field(mhi_cntrl, base, CHDBOFF, CHDBOFF_CHDBOFF_MASK,
- CHDBOFF_CHDBOFF_SHIFT, &val);
- if (ret) {
- dev_err(dev, "Unable to read CHDBOFF register\n");
- return -EIO;
- }
-
- /* Setup wake db */
- mhi_cntrl->wake_db = base + val + (8 * MHI_DEV_WAKE_DB);
- mhi_write_reg(mhi_cntrl, mhi_cntrl->wake_db, 4, 0);
- mhi_write_reg(mhi_cntrl, mhi_cntrl->wake_db, 0, 0);
- mhi_cntrl->wake_set = false;
-
- /* Setup channel db address for each channel in tre_ring */
- mhi_chan = mhi_cntrl->mhi_chan;
- for (i = 0; i < mhi_cntrl->max_chan; i++, val += 8, mhi_chan++)
- mhi_chan->tre_ring.db_addr = base + val;
-
- /* Read event ring db offset */
- ret = mhi_read_reg_field(mhi_cntrl, base, ERDBOFF, ERDBOFF_ERDBOFF_MASK,
- ERDBOFF_ERDBOFF_SHIFT, &val);
- if (ret) {
- dev_err(dev, "Unable to read ERDBOFF register\n");
- return -EIO;
- }
-
- /* Setup event db address for each ev_ring */
- mhi_event = mhi_cntrl->mhi_event;
- for (i = 0; i < mhi_cntrl->total_ev_rings; i++, val += 8, mhi_event++) {
- if (mhi_event->offload_ev)
- continue;
-
- mhi_event->ring.db_addr = base + val;
- }
-
- /* Setup DB register for primary CMD rings */
- mhi_cntrl->mhi_cmd[PRIMARY_CMD_RING].ring.db_addr = base + CRDB_LOWER;
-
- /* Write to MMIO registers */
- for (i = 0; reg_info[i].offset; i++)
- mhi_write_reg_field(mhi_cntrl, base, reg_info[i].offset,
- reg_info[i].mask, reg_info[i].shift,
- reg_info[i].val);
-
- return 0;
-}
-
-void mhi_deinit_chan_ctxt(struct mhi_controller *mhi_cntrl,
- struct mhi_chan *mhi_chan)
-{
- struct mhi_ring *buf_ring;
- struct mhi_ring *tre_ring;
- struct mhi_chan_ctxt *chan_ctxt;
- u32 tmp;
-
- buf_ring = &mhi_chan->buf_ring;
- tre_ring = &mhi_chan->tre_ring;
- chan_ctxt = &mhi_cntrl->mhi_ctxt->chan_ctxt[mhi_chan->chan];
-
- mhi_free_coherent(mhi_cntrl, tre_ring->alloc_size,
- tre_ring->pre_aligned, tre_ring->dma_handle);
- vfree(buf_ring->base);
-
- buf_ring->base = tre_ring->base = NULL;
- tre_ring->ctxt_wp = NULL;
- chan_ctxt->rbase = 0;
- chan_ctxt->rlen = 0;
- chan_ctxt->rp = 0;
- chan_ctxt->wp = 0;
-
- tmp = chan_ctxt->chcfg;
- tmp &= ~CHAN_CTX_CHSTATE_MASK;
- tmp |= (MHI_CH_STATE_DISABLED << CHAN_CTX_CHSTATE_SHIFT);
- chan_ctxt->chcfg = tmp;
-
- /* Update to all cores */
- smp_wmb();
-}
-
-int mhi_init_chan_ctxt(struct mhi_controller *mhi_cntrl,
- struct mhi_chan *mhi_chan)
-{
- struct mhi_ring *buf_ring;
- struct mhi_ring *tre_ring;
- struct mhi_chan_ctxt *chan_ctxt;
- u32 tmp;
- int ret;
-
- buf_ring = &mhi_chan->buf_ring;
- tre_ring = &mhi_chan->tre_ring;
- tre_ring->el_size = sizeof(struct mhi_tre);
- tre_ring->len = tre_ring->el_size * tre_ring->elements;
- chan_ctxt = &mhi_cntrl->mhi_ctxt->chan_ctxt[mhi_chan->chan];
- ret = mhi_alloc_aligned_ring(mhi_cntrl, tre_ring, tre_ring->len);
- if (ret)
- return -ENOMEM;
-
- buf_ring->el_size = sizeof(struct mhi_buf_info);
- buf_ring->len = buf_ring->el_size * buf_ring->elements;
- buf_ring->base = vzalloc(buf_ring->len);
-
- if (!buf_ring->base) {
- mhi_free_coherent(mhi_cntrl, tre_ring->alloc_size,
- tre_ring->pre_aligned, tre_ring->dma_handle);
- return -ENOMEM;
- }
-
- tmp = chan_ctxt->chcfg;
- tmp &= ~CHAN_CTX_CHSTATE_MASK;
- tmp |= (MHI_CH_STATE_ENABLED << CHAN_CTX_CHSTATE_SHIFT);
- chan_ctxt->chcfg = tmp;
-
- chan_ctxt->rbase = tre_ring->iommu_base;
- chan_ctxt->rp = chan_ctxt->wp = chan_ctxt->rbase;
- chan_ctxt->rlen = tre_ring->len;
- tre_ring->ctxt_wp = &chan_ctxt->wp;
-
- tre_ring->rp = tre_ring->wp = tre_ring->base;
- buf_ring->rp = buf_ring->wp = buf_ring->base;
- mhi_chan->db_cfg.db_mode = 1;
-
- /* Update to all cores */
- smp_wmb();
-
- return 0;
-}
-
-static int parse_ev_cfg(struct mhi_controller *mhi_cntrl,
- const struct mhi_controller_config *config)
-{
- struct mhi_event *mhi_event;
- const struct mhi_event_config *event_cfg;
- struct device *dev = mhi_cntrl->cntrl_dev;
- int i, num;
-
- num = config->num_events;
- mhi_cntrl->total_ev_rings = num;
- mhi_cntrl->mhi_event = kcalloc(num, sizeof(*mhi_cntrl->mhi_event),
- GFP_KERNEL);
- if (!mhi_cntrl->mhi_event)
- return -ENOMEM;
-
- /* Populate event ring */
- mhi_event = mhi_cntrl->mhi_event;
- for (i = 0; i < num; i++) {
- event_cfg = &config->event_cfg[i];
-
- mhi_event->er_index = i;
- mhi_event->ring.elements = event_cfg->num_elements;
- mhi_event->intmod = event_cfg->irq_moderation_ms;
- mhi_event->irq = event_cfg->irq;
-
- if (event_cfg->channel != U32_MAX) {
- /* This event ring has a dedicated channel */
- mhi_event->chan = event_cfg->channel;
- if (mhi_event->chan >= mhi_cntrl->max_chan) {
- dev_err(dev,
- "Event Ring channel not available\n");
- goto error_ev_cfg;
- }
-
- mhi_event->mhi_chan =
- &mhi_cntrl->mhi_chan[mhi_event->chan];
- }
-
- /* Priority is fixed to 1 for now */
- mhi_event->priority = 1;
-
- mhi_event->db_cfg.brstmode = event_cfg->mode;
- if (MHI_INVALID_BRSTMODE(mhi_event->db_cfg.brstmode))
- goto error_ev_cfg;
-
- if (mhi_event->db_cfg.brstmode == MHI_DB_BRST_ENABLE)
- mhi_event->db_cfg.process_db = mhi_db_brstmode;
- else
- mhi_event->db_cfg.process_db = mhi_db_brstmode_disable;
-
- mhi_event->data_type = event_cfg->data_type;
-
- switch (mhi_event->data_type) {
- case MHI_ER_DATA:
- mhi_event->process_event = mhi_process_data_event_ring;
- break;
- case MHI_ER_CTRL:
- mhi_event->process_event = mhi_process_ctrl_ev_ring;
- break;
- default:
- dev_err(dev, "Event Ring type not supported\n");
- goto error_ev_cfg;
- }
-
- mhi_event->hw_ring = event_cfg->hardware_event;
- if (mhi_event->hw_ring)
- mhi_cntrl->hw_ev_rings++;
- else
- mhi_cntrl->sw_ev_rings++;
-
- mhi_event->cl_manage = event_cfg->client_managed;
- mhi_event->offload_ev = event_cfg->offload_channel;
- mhi_event++;
- }
-
- return 0;
-
-error_ev_cfg:
-
- kfree(mhi_cntrl->mhi_event);
- return -EINVAL;
-}
-
-static int parse_ch_cfg(struct mhi_controller *mhi_cntrl,
- const struct mhi_controller_config *config)
-{
- const struct mhi_channel_config *ch_cfg;
- struct device *dev = mhi_cntrl->cntrl_dev;
- int i;
- u32 chan;
-
- mhi_cntrl->max_chan = config->max_channels;
-
- /*
- * The allocation of MHI channels can exceed 32KB in some scenarios,
- * so to avoid any memory possible allocation failures, vzalloc is
- * used here
- */
- mhi_cntrl->mhi_chan = vzalloc(mhi_cntrl->max_chan *
- sizeof(*mhi_cntrl->mhi_chan));
- if (!mhi_cntrl->mhi_chan)
- return -ENOMEM;
-
- INIT_LIST_HEAD(&mhi_cntrl->lpm_chans);
-
- /* Populate channel configurations */
- for (i = 0; i < config->num_channels; i++) {
- struct mhi_chan *mhi_chan;
-
- ch_cfg = &config->ch_cfg[i];
-
- chan = ch_cfg->num;
- if (chan >= mhi_cntrl->max_chan) {
- dev_err(dev, "Channel %d not available\n", chan);
- goto error_chan_cfg;
- }
-
- mhi_chan = &mhi_cntrl->mhi_chan[chan];
- mhi_chan->name = ch_cfg->name;
- mhi_chan->chan = chan;
-
- mhi_chan->tre_ring.elements = ch_cfg->num_elements;
- if (!mhi_chan->tre_ring.elements)
- goto error_chan_cfg;
-
- /*
- * For some channels, local ring length should be bigger than
- * the transfer ring length due to internal logical channels
- * in device. So host can queue much more buffers than transfer
- * ring length. Example, RSC channels should have a larger local
- * channel length than transfer ring length.
- */
- mhi_chan->buf_ring.elements = ch_cfg->local_elements;
- if (!mhi_chan->buf_ring.elements)
- mhi_chan->buf_ring.elements = mhi_chan->tre_ring.elements;
- mhi_chan->er_index = ch_cfg->event_ring;
- mhi_chan->dir = ch_cfg->dir;
-
- /*
- * For most channels, chtype is identical to channel directions.
- * So, if it is not defined then assign channel direction to
- * chtype
- */
- mhi_chan->type = ch_cfg->type;
- if (!mhi_chan->type)
- mhi_chan->type = (enum mhi_ch_type)mhi_chan->dir;
-
- mhi_chan->ee_mask = ch_cfg->ee_mask;
- mhi_chan->db_cfg.pollcfg = ch_cfg->pollcfg;
- mhi_chan->lpm_notify = ch_cfg->lpm_notify;
- mhi_chan->offload_ch = ch_cfg->offload_channel;
- mhi_chan->db_cfg.reset_req = ch_cfg->doorbell_mode_switch;
- mhi_chan->pre_alloc = ch_cfg->auto_queue;
- mhi_chan->auto_start = ch_cfg->auto_start;
-
- /*
- * If MHI host allocates buffers, then the channel direction
- * should be DMA_FROM_DEVICE
- */
- if (mhi_chan->pre_alloc && mhi_chan->dir != DMA_FROM_DEVICE) {
- dev_err(dev, "Invalid channel configuration\n");
- goto error_chan_cfg;
- }
-
- /*
- * Bi-directional and direction less channel must be an
- * offload channel
- */
- if ((mhi_chan->dir == DMA_BIDIRECTIONAL ||
- mhi_chan->dir == DMA_NONE) && !mhi_chan->offload_ch) {
- dev_err(dev, "Invalid channel configuration\n");
- goto error_chan_cfg;
- }
-
- if (!mhi_chan->offload_ch) {
- mhi_chan->db_cfg.brstmode = ch_cfg->doorbell;
- if (MHI_INVALID_BRSTMODE(mhi_chan->db_cfg.brstmode)) {
- dev_err(dev, "Invalid Door bell mode\n");
- goto error_chan_cfg;
- }
- }
-
- if (mhi_chan->db_cfg.brstmode == MHI_DB_BRST_ENABLE)
- mhi_chan->db_cfg.process_db = mhi_db_brstmode;
- else
- mhi_chan->db_cfg.process_db = mhi_db_brstmode_disable;
-
- mhi_chan->configured = true;
-
- if (mhi_chan->lpm_notify)
- list_add_tail(&mhi_chan->node, &mhi_cntrl->lpm_chans);
- }
-
- return 0;
-
-error_chan_cfg:
- vfree(mhi_cntrl->mhi_chan);
-
- return -EINVAL;
-}
-
-static int parse_config(struct mhi_controller *mhi_cntrl,
- const struct mhi_controller_config *config)
-{
- int ret;
-
- /* Parse MHI channel configuration */
- ret = parse_ch_cfg(mhi_cntrl, config);
- if (ret)
- return ret;
-
- /* Parse MHI event configuration */
- ret = parse_ev_cfg(mhi_cntrl, config);
- if (ret)
- goto error_ev_cfg;
-
- mhi_cntrl->timeout_ms = config->timeout_ms;
- if (!mhi_cntrl->timeout_ms)
- mhi_cntrl->timeout_ms = MHI_TIMEOUT_MS;
-
- mhi_cntrl->bounce_buf = config->use_bounce_buf;
- mhi_cntrl->buffer_len = config->buf_len;
- if (!mhi_cntrl->buffer_len)
- mhi_cntrl->buffer_len = MHI_MAX_MTU;
-
- /* By default, host is allowed to ring DB in both M0 and M2 states */
- mhi_cntrl->db_access = MHI_PM_M0 | MHI_PM_M2;
- if (config->m2_no_db)
- mhi_cntrl->db_access &= ~MHI_PM_M2;
-
- return 0;
-
-error_ev_cfg:
- vfree(mhi_cntrl->mhi_chan);
-
- return ret;
-}
-
-int mhi_register_controller(struct mhi_controller *mhi_cntrl,
- const struct mhi_controller_config *config)
-{
- struct mhi_event *mhi_event;
- struct mhi_chan *mhi_chan;
- struct mhi_cmd *mhi_cmd;
- struct mhi_device *mhi_dev;
- u32 soc_info;
- int ret, i;
-
- if (!mhi_cntrl)
- return -EINVAL;
-
- if (!mhi_cntrl->runtime_get || !mhi_cntrl->runtime_put ||
- !mhi_cntrl->status_cb || !mhi_cntrl->read_reg ||
- !mhi_cntrl->write_reg)
- return -EINVAL;
-
- ret = parse_config(mhi_cntrl, config);
- if (ret)
- return -EINVAL;
-
- mhi_cntrl->mhi_cmd = kcalloc(NR_OF_CMD_RINGS,
- sizeof(*mhi_cntrl->mhi_cmd), GFP_KERNEL);
- if (!mhi_cntrl->mhi_cmd) {
- ret = -ENOMEM;
- goto error_alloc_cmd;
- }
-
- INIT_LIST_HEAD(&mhi_cntrl->transition_list);
- mutex_init(&mhi_cntrl->pm_mutex);
- rwlock_init(&mhi_cntrl->pm_lock);
- spin_lock_init(&mhi_cntrl->transition_lock);
- spin_lock_init(&mhi_cntrl->wlock);
- INIT_WORK(&mhi_cntrl->st_worker, mhi_pm_st_worker);
- init_waitqueue_head(&mhi_cntrl->state_event);
-
- mhi_cmd = mhi_cntrl->mhi_cmd;
- for (i = 0; i < NR_OF_CMD_RINGS; i++, mhi_cmd++)
- spin_lock_init(&mhi_cmd->lock);
-
- mhi_event = mhi_cntrl->mhi_event;
- for (i = 0; i < mhi_cntrl->total_ev_rings; i++, mhi_event++) {
- /* Skip for offload events */
- if (mhi_event->offload_ev)
- continue;
-
- mhi_event->mhi_cntrl = mhi_cntrl;
- spin_lock_init(&mhi_event->lock);
- if (mhi_event->data_type == MHI_ER_CTRL)
- tasklet_init(&mhi_event->task, mhi_ctrl_ev_task,
- (ulong)mhi_event);
- else
- tasklet_init(&mhi_event->task, mhi_ev_task,
- (ulong)mhi_event);
- }
-
- mhi_chan = mhi_cntrl->mhi_chan;
- for (i = 0; i < mhi_cntrl->max_chan; i++, mhi_chan++) {
- mutex_init(&mhi_chan->mutex);
- init_completion(&mhi_chan->completion);
- rwlock_init(&mhi_chan->lock);
-
- /* used in setting bei field of TRE */
- mhi_event = &mhi_cntrl->mhi_event[mhi_chan->er_index];
- mhi_chan->intmod = mhi_event->intmod;
- }
-
- if (mhi_cntrl->bounce_buf) {
- mhi_cntrl->map_single = mhi_map_single_use_bb;
- mhi_cntrl->unmap_single = mhi_unmap_single_use_bb;
- } else {
- mhi_cntrl->map_single = mhi_map_single_no_bb;
- mhi_cntrl->unmap_single = mhi_unmap_single_no_bb;
- }
-
- /* Read the MHI device info */
- ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->regs,
- SOC_HW_VERSION_OFFS, &soc_info);
- if (ret)
- goto error_alloc_dev;
-
- mhi_cntrl->family_number = (soc_info & SOC_HW_VERSION_FAM_NUM_BMSK) >>
- SOC_HW_VERSION_FAM_NUM_SHFT;
- mhi_cntrl->device_number = (soc_info & SOC_HW_VERSION_DEV_NUM_BMSK) >>
- SOC_HW_VERSION_DEV_NUM_SHFT;
- mhi_cntrl->major_version = (soc_info & SOC_HW_VERSION_MAJOR_VER_BMSK) >>
- SOC_HW_VERSION_MAJOR_VER_SHFT;
- mhi_cntrl->minor_version = (soc_info & SOC_HW_VERSION_MINOR_VER_BMSK) >>
- SOC_HW_VERSION_MINOR_VER_SHFT;
-
- /* Register controller with MHI bus */
- mhi_dev = mhi_alloc_device(mhi_cntrl);
- if (IS_ERR(mhi_dev)) {
- dev_err(mhi_cntrl->cntrl_dev, "Failed to allocate MHI device\n");
- ret = PTR_ERR(mhi_dev);
- goto error_alloc_dev;
- }
-
- mhi_dev->dev_type = MHI_DEVICE_CONTROLLER;
- mhi_dev->mhi_cntrl = mhi_cntrl;
- dev_set_name(&mhi_dev->dev, "%s", dev_name(mhi_cntrl->cntrl_dev));
- mhi_dev->name = dev_name(mhi_cntrl->cntrl_dev);
-
- /* Init wakeup source */
- device_init_wakeup(&mhi_dev->dev, true);
-
- ret = device_add(&mhi_dev->dev);
- if (ret)
- goto error_add_dev;
-
- mhi_cntrl->mhi_dev = mhi_dev;
-
- mhi_create_debugfs(mhi_cntrl);
-
- return 0;
-
-error_add_dev:
- put_device(&mhi_dev->dev);
-
-error_alloc_dev:
- kfree(mhi_cntrl->mhi_cmd);
-
-error_alloc_cmd:
- vfree(mhi_cntrl->mhi_chan);
- kfree(mhi_cntrl->mhi_event);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(mhi_register_controller);
-
-void mhi_unregister_controller(struct mhi_controller *mhi_cntrl)
-{
- struct mhi_device *mhi_dev = mhi_cntrl->mhi_dev;
- struct mhi_chan *mhi_chan = mhi_cntrl->mhi_chan;
- unsigned int i;
-
- mhi_destroy_debugfs(mhi_cntrl);
-
- kfree(mhi_cntrl->mhi_cmd);
- kfree(mhi_cntrl->mhi_event);
-
- /* Drop the references to MHI devices created for channels */
- for (i = 0; i < mhi_cntrl->max_chan; i++, mhi_chan++) {
- if (!mhi_chan->mhi_dev)
- continue;
-
- put_device(&mhi_chan->mhi_dev->dev);
- }
- vfree(mhi_cntrl->mhi_chan);
-
- device_del(&mhi_dev->dev);
- put_device(&mhi_dev->dev);
-}
-EXPORT_SYMBOL_GPL(mhi_unregister_controller);
-
-struct mhi_controller *mhi_alloc_controller(void)
-{
- struct mhi_controller *mhi_cntrl;
-
- mhi_cntrl = kzalloc(sizeof(*mhi_cntrl), GFP_KERNEL);
-
- return mhi_cntrl;
-}
-EXPORT_SYMBOL_GPL(mhi_alloc_controller);
-
-void mhi_free_controller(struct mhi_controller *mhi_cntrl)
-{
- kfree(mhi_cntrl);
-}
-EXPORT_SYMBOL_GPL(mhi_free_controller);
-
-int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl)
-{
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- u32 bhie_off;
- int ret;
-
- mutex_lock(&mhi_cntrl->pm_mutex);
-
- ret = mhi_init_dev_ctxt(mhi_cntrl);
- if (ret)
- goto error_dev_ctxt;
-
- /*
- * Allocate RDDM table if specified, this table is for debugging purpose
- */
- if (mhi_cntrl->rddm_size) {
- mhi_alloc_bhie_table(mhi_cntrl, &mhi_cntrl->rddm_image,
- mhi_cntrl->rddm_size);
-
- /*
- * This controller supports RDDM, so we need to manually clear
- * BHIE RX registers since POR values are undefined.
- */
- ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->regs, BHIEOFF,
- &bhie_off);
- if (ret) {
- dev_err(dev, "Error getting BHIE offset\n");
- goto bhie_error;
- }
-
- mhi_cntrl->bhie = mhi_cntrl->regs + bhie_off;
- memset_io(mhi_cntrl->bhie + BHIE_RXVECADDR_LOW_OFFS,
- 0, BHIE_RXVECSTATUS_OFFS - BHIE_RXVECADDR_LOW_OFFS +
- 4);
-
- if (mhi_cntrl->rddm_image)
- mhi_rddm_prepare(mhi_cntrl, mhi_cntrl->rddm_image);
- }
-
- mhi_cntrl->pre_init = true;
-
- mutex_unlock(&mhi_cntrl->pm_mutex);
-
- return 0;
-
-bhie_error:
- if (mhi_cntrl->rddm_image) {
- mhi_free_bhie_table(mhi_cntrl, mhi_cntrl->rddm_image);
- mhi_cntrl->rddm_image = NULL;
- }
-
-error_dev_ctxt:
- mutex_unlock(&mhi_cntrl->pm_mutex);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(mhi_prepare_for_power_up);
-
-void mhi_unprepare_after_power_down(struct mhi_controller *mhi_cntrl)
-{
- if (mhi_cntrl->fbc_image) {
- mhi_free_bhie_table(mhi_cntrl, mhi_cntrl->fbc_image);
- mhi_cntrl->fbc_image = NULL;
- }
-
- if (mhi_cntrl->rddm_image) {
- mhi_free_bhie_table(mhi_cntrl, mhi_cntrl->rddm_image);
- mhi_cntrl->rddm_image = NULL;
- }
-
- mhi_deinit_dev_ctxt(mhi_cntrl);
- mhi_cntrl->pre_init = false;
-}
-EXPORT_SYMBOL_GPL(mhi_unprepare_after_power_down);
-
-static void mhi_release_device(struct device *dev)
-{
- struct mhi_device *mhi_dev = to_mhi_device(dev);
-
- /*
- * We need to set the mhi_chan->mhi_dev to NULL here since the MHI
- * devices for the channels will only get created if the mhi_dev
- * associated with it is NULL. This scenario will happen during the
- * controller suspend and resume.
- */
- if (mhi_dev->ul_chan)
- mhi_dev->ul_chan->mhi_dev = NULL;
-
- if (mhi_dev->dl_chan)
- mhi_dev->dl_chan->mhi_dev = NULL;
-
- kfree(mhi_dev);
-}
-
-struct mhi_device *mhi_alloc_device(struct mhi_controller *mhi_cntrl)
-{
- struct mhi_device *mhi_dev;
- struct device *dev;
-
- mhi_dev = kzalloc(sizeof(*mhi_dev), GFP_KERNEL);
- if (!mhi_dev)
- return ERR_PTR(-ENOMEM);
-
- dev = &mhi_dev->dev;
- device_initialize(dev);
- dev->bus = &mhi_bus_type;
- dev->release = mhi_release_device;
- dev->parent = mhi_cntrl->cntrl_dev;
- mhi_dev->mhi_cntrl = mhi_cntrl;
- mhi_dev->dev_wake = 0;
-
- return mhi_dev;
-}
-
-static int mhi_driver_probe(struct device *dev)
-{
- struct mhi_device *mhi_dev = to_mhi_device(dev);
- struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
- struct device_driver *drv = dev->driver;
- struct mhi_driver *mhi_drv = to_mhi_driver(drv);
- struct mhi_event *mhi_event;
- struct mhi_chan *ul_chan = mhi_dev->ul_chan;
- struct mhi_chan *dl_chan = mhi_dev->dl_chan;
- int ret;
-
- /* Bring device out of LPM */
- ret = mhi_device_get_sync(mhi_dev);
- if (ret)
- return ret;
-
- ret = -EINVAL;
-
- if (ul_chan) {
- /*
- * If channel supports LPM notifications then status_cb should
- * be provided
- */
- if (ul_chan->lpm_notify && !mhi_drv->status_cb)
- goto exit_probe;
-
- /* For non-offload channels then xfer_cb should be provided */
- if (!ul_chan->offload_ch && !mhi_drv->ul_xfer_cb)
- goto exit_probe;
-
- ul_chan->xfer_cb = mhi_drv->ul_xfer_cb;
- if (ul_chan->auto_start) {
- ret = mhi_prepare_channel(mhi_cntrl, ul_chan);
- if (ret)
- goto exit_probe;
- }
- }
-
- ret = -EINVAL;
- if (dl_chan) {
- /*
- * If channel supports LPM notifications then status_cb should
- * be provided
- */
- if (dl_chan->lpm_notify && !mhi_drv->status_cb)
- goto exit_probe;
-
- /* For non-offload channels then xfer_cb should be provided */
- if (!dl_chan->offload_ch && !mhi_drv->dl_xfer_cb)
- goto exit_probe;
-
- mhi_event = &mhi_cntrl->mhi_event[dl_chan->er_index];
-
- /*
- * If the channel event ring is managed by client, then
- * status_cb must be provided so that the framework can
- * notify pending data
- */
- if (mhi_event->cl_manage && !mhi_drv->status_cb)
- goto exit_probe;
-
- dl_chan->xfer_cb = mhi_drv->dl_xfer_cb;
- }
-
- /* Call the user provided probe function */
- ret = mhi_drv->probe(mhi_dev, mhi_dev->id);
- if (ret)
- goto exit_probe;
-
- if (dl_chan && dl_chan->auto_start)
- mhi_prepare_channel(mhi_cntrl, dl_chan);
-
- mhi_device_put(mhi_dev);
-
- return ret;
-
-exit_probe:
- mhi_unprepare_from_transfer(mhi_dev);
-
- mhi_device_put(mhi_dev);
-
- return ret;
-}
-
-static int mhi_driver_remove(struct device *dev)
-{
- struct mhi_device *mhi_dev = to_mhi_device(dev);
- struct mhi_driver *mhi_drv = to_mhi_driver(dev->driver);
- struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
- struct mhi_chan *mhi_chan;
- enum mhi_ch_state ch_state[] = {
- MHI_CH_STATE_DISABLED,
- MHI_CH_STATE_DISABLED
- };
- int dir;
-
- /* Skip if it is a controller device */
- if (mhi_dev->dev_type == MHI_DEVICE_CONTROLLER)
- return 0;
-
- /* Reset both channels */
- for (dir = 0; dir < 2; dir++) {
- mhi_chan = dir ? mhi_dev->ul_chan : mhi_dev->dl_chan;
-
- if (!mhi_chan)
- continue;
-
- /* Wake all threads waiting for completion */
- write_lock_irq(&mhi_chan->lock);
- mhi_chan->ccs = MHI_EV_CC_INVALID;
- complete_all(&mhi_chan->completion);
- write_unlock_irq(&mhi_chan->lock);
-
- /* Set the channel state to disabled */
- mutex_lock(&mhi_chan->mutex);
- write_lock_irq(&mhi_chan->lock);
- ch_state[dir] = mhi_chan->ch_state;
- mhi_chan->ch_state = MHI_CH_STATE_SUSPENDED;
- write_unlock_irq(&mhi_chan->lock);
-
- /* Reset the non-offload channel */
- if (!mhi_chan->offload_ch)
- mhi_reset_chan(mhi_cntrl, mhi_chan);
-
- mutex_unlock(&mhi_chan->mutex);
- }
-
- mhi_drv->remove(mhi_dev);
-
- /* De-init channel if it was enabled */
- for (dir = 0; dir < 2; dir++) {
- mhi_chan = dir ? mhi_dev->ul_chan : mhi_dev->dl_chan;
-
- if (!mhi_chan)
- continue;
-
- mutex_lock(&mhi_chan->mutex);
-
- if ((ch_state[dir] == MHI_CH_STATE_ENABLED ||
- ch_state[dir] == MHI_CH_STATE_STOP) &&
- !mhi_chan->offload_ch)
- mhi_deinit_chan_ctxt(mhi_cntrl, mhi_chan);
-
- mhi_chan->ch_state = MHI_CH_STATE_DISABLED;
-
- mutex_unlock(&mhi_chan->mutex);
- }
-
- while (mhi_dev->dev_wake)
- mhi_device_put(mhi_dev);
-
- return 0;
-}
-
-int __mhi_driver_register(struct mhi_driver *mhi_drv, struct module *owner)
-{
- struct device_driver *driver = &mhi_drv->driver;
-
- if (!mhi_drv->probe || !mhi_drv->remove)
- return -EINVAL;
-
- driver->bus = &mhi_bus_type;
- driver->owner = owner;
- driver->probe = mhi_driver_probe;
- driver->remove = mhi_driver_remove;
-
- return driver_register(driver);
-}
-EXPORT_SYMBOL_GPL(__mhi_driver_register);
-
-void mhi_driver_unregister(struct mhi_driver *mhi_drv)
-{
- driver_unregister(&mhi_drv->driver);
-}
-EXPORT_SYMBOL_GPL(mhi_driver_unregister);
-
-static int mhi_uevent(struct device *dev, struct kobj_uevent_env *env)
-{
- struct mhi_device *mhi_dev = to_mhi_device(dev);
-
- return add_uevent_var(env, "MODALIAS=" MHI_DEVICE_MODALIAS_FMT,
- mhi_dev->name);
-}
-
-static int mhi_match(struct device *dev, struct device_driver *drv)
-{
- struct mhi_device *mhi_dev = to_mhi_device(dev);
- struct mhi_driver *mhi_drv = to_mhi_driver(drv);
- const struct mhi_device_id *id;
-
- /*
- * If the device is a controller type then there is no client driver
- * associated with it
- */
- if (mhi_dev->dev_type == MHI_DEVICE_CONTROLLER)
- return 0;
-
- for (id = mhi_drv->id_table; id->chan[0]; id++)
- if (!strcmp(mhi_dev->name, id->chan)) {
- mhi_dev->id = id;
- return 1;
- }
-
- return 0;
-};
-
-struct bus_type mhi_bus_type = {
- .name = "mhi",
- .dev_name = "mhi",
- .match = mhi_match,
- .uevent = mhi_uevent,
- .dev_groups = mhi_dev_groups,
-};
-
-static int __init mhi_init(void)
-{
- mhi_debugfs_init();
- return bus_register(&mhi_bus_type);
-}
-
-static void __exit mhi_exit(void)
-{
- mhi_debugfs_exit();
- bus_unregister(&mhi_bus_type);
-}
-
-postcore_initcall(mhi_init);
-module_exit(mhi_exit);
-
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("MHI Host Interface");
diff --git a/drivers/bus/mhi/core/internal.h b/drivers/bus/mhi/core/internal.h
deleted file mode 100644
index 7989269ddd96..000000000000
--- a/drivers/bus/mhi/core/internal.h
+++ /dev/null
@@ -1,722 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
- *
- */
-
-#ifndef _MHI_INT_H
-#define _MHI_INT_H
-
-#include <linux/mhi.h>
-
-extern struct bus_type mhi_bus_type;
-
-#define MHIREGLEN (0x0)
-#define MHIREGLEN_MHIREGLEN_MASK (0xFFFFFFFF)
-#define MHIREGLEN_MHIREGLEN_SHIFT (0)
-
-#define MHIVER (0x8)
-#define MHIVER_MHIVER_MASK (0xFFFFFFFF)
-#define MHIVER_MHIVER_SHIFT (0)
-
-#define MHICFG (0x10)
-#define MHICFG_NHWER_MASK (0xFF000000)
-#define MHICFG_NHWER_SHIFT (24)
-#define MHICFG_NER_MASK (0xFF0000)
-#define MHICFG_NER_SHIFT (16)
-#define MHICFG_NHWCH_MASK (0xFF00)
-#define MHICFG_NHWCH_SHIFT (8)
-#define MHICFG_NCH_MASK (0xFF)
-#define MHICFG_NCH_SHIFT (0)
-
-#define CHDBOFF (0x18)
-#define CHDBOFF_CHDBOFF_MASK (0xFFFFFFFF)
-#define CHDBOFF_CHDBOFF_SHIFT (0)
-
-#define ERDBOFF (0x20)
-#define ERDBOFF_ERDBOFF_MASK (0xFFFFFFFF)
-#define ERDBOFF_ERDBOFF_SHIFT (0)
-
-#define BHIOFF (0x28)
-#define BHIOFF_BHIOFF_MASK (0xFFFFFFFF)
-#define BHIOFF_BHIOFF_SHIFT (0)
-
-#define BHIEOFF (0x2C)
-#define BHIEOFF_BHIEOFF_MASK (0xFFFFFFFF)
-#define BHIEOFF_BHIEOFF_SHIFT (0)
-
-#define DEBUGOFF (0x30)
-#define DEBUGOFF_DEBUGOFF_MASK (0xFFFFFFFF)
-#define DEBUGOFF_DEBUGOFF_SHIFT (0)
-
-#define MHICTRL (0x38)
-#define MHICTRL_MHISTATE_MASK (0x0000FF00)
-#define MHICTRL_MHISTATE_SHIFT (8)
-#define MHICTRL_RESET_MASK (0x2)
-#define MHICTRL_RESET_SHIFT (1)
-
-#define MHISTATUS (0x48)
-#define MHISTATUS_MHISTATE_MASK (0x0000FF00)
-#define MHISTATUS_MHISTATE_SHIFT (8)
-#define MHISTATUS_SYSERR_MASK (0x4)
-#define MHISTATUS_SYSERR_SHIFT (2)
-#define MHISTATUS_READY_MASK (0x1)
-#define MHISTATUS_READY_SHIFT (0)
-
-#define CCABAP_LOWER (0x58)
-#define CCABAP_LOWER_CCABAP_LOWER_MASK (0xFFFFFFFF)
-#define CCABAP_LOWER_CCABAP_LOWER_SHIFT (0)
-
-#define CCABAP_HIGHER (0x5C)
-#define CCABAP_HIGHER_CCABAP_HIGHER_MASK (0xFFFFFFFF)
-#define CCABAP_HIGHER_CCABAP_HIGHER_SHIFT (0)
-
-#define ECABAP_LOWER (0x60)
-#define ECABAP_LOWER_ECABAP_LOWER_MASK (0xFFFFFFFF)
-#define ECABAP_LOWER_ECABAP_LOWER_SHIFT (0)
-
-#define ECABAP_HIGHER (0x64)
-#define ECABAP_HIGHER_ECABAP_HIGHER_MASK (0xFFFFFFFF)
-#define ECABAP_HIGHER_ECABAP_HIGHER_SHIFT (0)
-
-#define CRCBAP_LOWER (0x68)
-#define CRCBAP_LOWER_CRCBAP_LOWER_MASK (0xFFFFFFFF)
-#define CRCBAP_LOWER_CRCBAP_LOWER_SHIFT (0)
-
-#define CRCBAP_HIGHER (0x6C)
-#define CRCBAP_HIGHER_CRCBAP_HIGHER_MASK (0xFFFFFFFF)
-#define CRCBAP_HIGHER_CRCBAP_HIGHER_SHIFT (0)
-
-#define CRDB_LOWER (0x70)
-#define CRDB_LOWER_CRDB_LOWER_MASK (0xFFFFFFFF)
-#define CRDB_LOWER_CRDB_LOWER_SHIFT (0)
-
-#define CRDB_HIGHER (0x74)
-#define CRDB_HIGHER_CRDB_HIGHER_MASK (0xFFFFFFFF)
-#define CRDB_HIGHER_CRDB_HIGHER_SHIFT (0)
-
-#define MHICTRLBASE_LOWER (0x80)
-#define MHICTRLBASE_LOWER_MHICTRLBASE_LOWER_MASK (0xFFFFFFFF)
-#define MHICTRLBASE_LOWER_MHICTRLBASE_LOWER_SHIFT (0)
-
-#define MHICTRLBASE_HIGHER (0x84)
-#define MHICTRLBASE_HIGHER_MHICTRLBASE_HIGHER_MASK (0xFFFFFFFF)
-#define MHICTRLBASE_HIGHER_MHICTRLBASE_HIGHER_SHIFT (0)
-
-#define MHICTRLLIMIT_LOWER (0x88)
-#define MHICTRLLIMIT_LOWER_MHICTRLLIMIT_LOWER_MASK (0xFFFFFFFF)
-#define MHICTRLLIMIT_LOWER_MHICTRLLIMIT_LOWER_SHIFT (0)
-
-#define MHICTRLLIMIT_HIGHER (0x8C)
-#define MHICTRLLIMIT_HIGHER_MHICTRLLIMIT_HIGHER_MASK (0xFFFFFFFF)
-#define MHICTRLLIMIT_HIGHER_MHICTRLLIMIT_HIGHER_SHIFT (0)
-
-#define MHIDATABASE_LOWER (0x98)
-#define MHIDATABASE_LOWER_MHIDATABASE_LOWER_MASK (0xFFFFFFFF)
-#define MHIDATABASE_LOWER_MHIDATABASE_LOWER_SHIFT (0)
-
-#define MHIDATABASE_HIGHER (0x9C)
-#define MHIDATABASE_HIGHER_MHIDATABASE_HIGHER_MASK (0xFFFFFFFF)
-#define MHIDATABASE_HIGHER_MHIDATABASE_HIGHER_SHIFT (0)
-
-#define MHIDATALIMIT_LOWER (0xA0)
-#define MHIDATALIMIT_LOWER_MHIDATALIMIT_LOWER_MASK (0xFFFFFFFF)
-#define MHIDATALIMIT_LOWER_MHIDATALIMIT_LOWER_SHIFT (0)
-
-#define MHIDATALIMIT_HIGHER (0xA4)
-#define MHIDATALIMIT_HIGHER_MHIDATALIMIT_HIGHER_MASK (0xFFFFFFFF)
-#define MHIDATALIMIT_HIGHER_MHIDATALIMIT_HIGHER_SHIFT (0)
-
-/* Host request register */
-#define MHI_SOC_RESET_REQ_OFFSET (0xB0)
-#define MHI_SOC_RESET_REQ BIT(0)
-
-/* MHI BHI offfsets */
-#define BHI_BHIVERSION_MINOR (0x00)
-#define BHI_BHIVERSION_MAJOR (0x04)
-#define BHI_IMGADDR_LOW (0x08)
-#define BHI_IMGADDR_HIGH (0x0C)
-#define BHI_IMGSIZE (0x10)
-#define BHI_RSVD1 (0x14)
-#define BHI_IMGTXDB (0x18)
-#define BHI_TXDB_SEQNUM_BMSK (0x3FFFFFFF)
-#define BHI_TXDB_SEQNUM_SHFT (0)
-#define BHI_RSVD2 (0x1C)
-#define BHI_INTVEC (0x20)
-#define BHI_RSVD3 (0x24)
-#define BHI_EXECENV (0x28)
-#define BHI_STATUS (0x2C)
-#define BHI_ERRCODE (0x30)
-#define BHI_ERRDBG1 (0x34)
-#define BHI_ERRDBG2 (0x38)
-#define BHI_ERRDBG3 (0x3C)
-#define BHI_SERIALNU (0x40)
-#define BHI_SBLANTIROLLVER (0x44)
-#define BHI_NUMSEG (0x48)
-#define BHI_MSMHWID(n) (0x4C + (0x4 * n))
-#define BHI_OEMPKHASH(n) (0x64 + (0x4 * n))
-#define BHI_RSVD5 (0xC4)
-#define BHI_STATUS_MASK (0xC0000000)
-#define BHI_STATUS_SHIFT (30)
-#define BHI_STATUS_ERROR (3)
-#define BHI_STATUS_SUCCESS (2)
-#define BHI_STATUS_RESET (0)
-
-/* MHI BHIE offsets */
-#define BHIE_MSMSOCID_OFFS (0x0000)
-#define BHIE_TXVECADDR_LOW_OFFS (0x002C)
-#define BHIE_TXVECADDR_HIGH_OFFS (0x0030)
-#define BHIE_TXVECSIZE_OFFS (0x0034)
-#define BHIE_TXVECDB_OFFS (0x003C)
-#define BHIE_TXVECDB_SEQNUM_BMSK (0x3FFFFFFF)
-#define BHIE_TXVECDB_SEQNUM_SHFT (0)
-#define BHIE_TXVECSTATUS_OFFS (0x0044)
-#define BHIE_TXVECSTATUS_SEQNUM_BMSK (0x3FFFFFFF)
-#define BHIE_TXVECSTATUS_SEQNUM_SHFT (0)
-#define BHIE_TXVECSTATUS_STATUS_BMSK (0xC0000000)
-#define BHIE_TXVECSTATUS_STATUS_SHFT (30)
-#define BHIE_TXVECSTATUS_STATUS_RESET (0x00)
-#define BHIE_TXVECSTATUS_STATUS_XFER_COMPL (0x02)
-#define BHIE_TXVECSTATUS_STATUS_ERROR (0x03)
-#define BHIE_RXVECADDR_LOW_OFFS (0x0060)
-#define BHIE_RXVECADDR_HIGH_OFFS (0x0064)
-#define BHIE_RXVECSIZE_OFFS (0x0068)
-#define BHIE_RXVECDB_OFFS (0x0070)
-#define BHIE_RXVECDB_SEQNUM_BMSK (0x3FFFFFFF)
-#define BHIE_RXVECDB_SEQNUM_SHFT (0)
-#define BHIE_RXVECSTATUS_OFFS (0x0078)
-#define BHIE_RXVECSTATUS_SEQNUM_BMSK (0x3FFFFFFF)
-#define BHIE_RXVECSTATUS_SEQNUM_SHFT (0)
-#define BHIE_RXVECSTATUS_STATUS_BMSK (0xC0000000)
-#define BHIE_RXVECSTATUS_STATUS_SHFT (30)
-#define BHIE_RXVECSTATUS_STATUS_RESET (0x00)
-#define BHIE_RXVECSTATUS_STATUS_XFER_COMPL (0x02)
-#define BHIE_RXVECSTATUS_STATUS_ERROR (0x03)
-
-#define SOC_HW_VERSION_OFFS (0x224)
-#define SOC_HW_VERSION_FAM_NUM_BMSK (0xF0000000)
-#define SOC_HW_VERSION_FAM_NUM_SHFT (28)
-#define SOC_HW_VERSION_DEV_NUM_BMSK (0x0FFF0000)
-#define SOC_HW_VERSION_DEV_NUM_SHFT (16)
-#define SOC_HW_VERSION_MAJOR_VER_BMSK (0x0000FF00)
-#define SOC_HW_VERSION_MAJOR_VER_SHFT (8)
-#define SOC_HW_VERSION_MINOR_VER_BMSK (0x000000FF)
-#define SOC_HW_VERSION_MINOR_VER_SHFT (0)
-
-#define EV_CTX_RESERVED_MASK GENMASK(7, 0)
-#define EV_CTX_INTMODC_MASK GENMASK(15, 8)
-#define EV_CTX_INTMODC_SHIFT 8
-#define EV_CTX_INTMODT_MASK GENMASK(31, 16)
-#define EV_CTX_INTMODT_SHIFT 16
-struct mhi_event_ctxt {
- __u32 intmod;
- __u32 ertype;
- __u32 msivec;
-
- __u64 rbase __packed __aligned(4);
- __u64 rlen __packed __aligned(4);
- __u64 rp __packed __aligned(4);
- __u64 wp __packed __aligned(4);
-};
-
-#define CHAN_CTX_CHSTATE_MASK GENMASK(7, 0)
-#define CHAN_CTX_CHSTATE_SHIFT 0
-#define CHAN_CTX_BRSTMODE_MASK GENMASK(9, 8)
-#define CHAN_CTX_BRSTMODE_SHIFT 8
-#define CHAN_CTX_POLLCFG_MASK GENMASK(15, 10)
-#define CHAN_CTX_POLLCFG_SHIFT 10
-#define CHAN_CTX_RESERVED_MASK GENMASK(31, 16)
-struct mhi_chan_ctxt {
- __u32 chcfg;
- __u32 chtype;
- __u32 erindex;
-
- __u64 rbase __packed __aligned(4);
- __u64 rlen __packed __aligned(4);
- __u64 rp __packed __aligned(4);
- __u64 wp __packed __aligned(4);
-};
-
-struct mhi_cmd_ctxt {
- __u32 reserved0;
- __u32 reserved1;
- __u32 reserved2;
-
- __u64 rbase __packed __aligned(4);
- __u64 rlen __packed __aligned(4);
- __u64 rp __packed __aligned(4);
- __u64 wp __packed __aligned(4);
-};
-
-struct mhi_ctxt {
- struct mhi_event_ctxt *er_ctxt;
- struct mhi_chan_ctxt *chan_ctxt;
- struct mhi_cmd_ctxt *cmd_ctxt;
- dma_addr_t er_ctxt_addr;
- dma_addr_t chan_ctxt_addr;
- dma_addr_t cmd_ctxt_addr;
-};
-
-struct mhi_tre {
- u64 ptr;
- u32 dword[2];
-};
-
-struct bhi_vec_entry {
- u64 dma_addr;
- u64 size;
-};
-
-enum mhi_cmd_type {
- MHI_CMD_NOP = 1,
- MHI_CMD_RESET_CHAN = 16,
- MHI_CMD_STOP_CHAN = 17,
- MHI_CMD_START_CHAN = 18,
-};
-
-/* No operation command */
-#define MHI_TRE_CMD_NOOP_PTR (0)
-#define MHI_TRE_CMD_NOOP_DWORD0 (0)
-#define MHI_TRE_CMD_NOOP_DWORD1 (MHI_CMD_NOP << 16)
-
-/* Channel reset command */
-#define MHI_TRE_CMD_RESET_PTR (0)
-#define MHI_TRE_CMD_RESET_DWORD0 (0)
-#define MHI_TRE_CMD_RESET_DWORD1(chid) ((chid << 24) | \
- (MHI_CMD_RESET_CHAN << 16))
-
-/* Channel stop command */
-#define MHI_TRE_CMD_STOP_PTR (0)
-#define MHI_TRE_CMD_STOP_DWORD0 (0)
-#define MHI_TRE_CMD_STOP_DWORD1(chid) ((chid << 24) | \
- (MHI_CMD_STOP_CHAN << 16))
-
-/* Channel start command */
-#define MHI_TRE_CMD_START_PTR (0)
-#define MHI_TRE_CMD_START_DWORD0 (0)
-#define MHI_TRE_CMD_START_DWORD1(chid) ((chid << 24) | \
- (MHI_CMD_START_CHAN << 16))
-
-#define MHI_TRE_GET_CMD_CHID(tre) (((tre)->dword[1] >> 24) & 0xFF)
-#define MHI_TRE_GET_CMD_TYPE(tre) (((tre)->dword[1] >> 16) & 0xFF)
-
-/* Event descriptor macros */
-#define MHI_TRE_EV_PTR(ptr) (ptr)
-#define MHI_TRE_EV_DWORD0(code, len) ((code << 24) | len)
-#define MHI_TRE_EV_DWORD1(chid, type) ((chid << 24) | (type << 16))
-#define MHI_TRE_GET_EV_PTR(tre) ((tre)->ptr)
-#define MHI_TRE_GET_EV_CODE(tre) (((tre)->dword[0] >> 24) & 0xFF)
-#define MHI_TRE_GET_EV_LEN(tre) ((tre)->dword[0] & 0xFFFF)
-#define MHI_TRE_GET_EV_CHID(tre) (((tre)->dword[1] >> 24) & 0xFF)
-#define MHI_TRE_GET_EV_TYPE(tre) (((tre)->dword[1] >> 16) & 0xFF)
-#define MHI_TRE_GET_EV_STATE(tre) (((tre)->dword[0] >> 24) & 0xFF)
-#define MHI_TRE_GET_EV_EXECENV(tre) (((tre)->dword[0] >> 24) & 0xFF)
-#define MHI_TRE_GET_EV_SEQ(tre) ((tre)->dword[0])
-#define MHI_TRE_GET_EV_TIME(tre) ((tre)->ptr)
-#define MHI_TRE_GET_EV_COOKIE(tre) lower_32_bits((tre)->ptr)
-#define MHI_TRE_GET_EV_VEID(tre) (((tre)->dword[0] >> 16) & 0xFF)
-#define MHI_TRE_GET_EV_LINKSPEED(tre) (((tre)->dword[1] >> 24) & 0xFF)
-#define MHI_TRE_GET_EV_LINKWIDTH(tre) ((tre)->dword[0] & 0xFF)
-
-/* Transfer descriptor macros */
-#define MHI_TRE_DATA_PTR(ptr) (ptr)
-#define MHI_TRE_DATA_DWORD0(len) (len & MHI_MAX_MTU)
-#define MHI_TRE_DATA_DWORD1(bei, ieot, ieob, chain) ((2 << 16) | (bei << 10) \
- | (ieot << 9) | (ieob << 8) | chain)
-
-/* RSC transfer descriptor macros */
-#define MHI_RSCTRE_DATA_PTR(ptr, len) (((u64)len << 48) | ptr)
-#define MHI_RSCTRE_DATA_DWORD0(cookie) (cookie)
-#define MHI_RSCTRE_DATA_DWORD1 (MHI_PKT_TYPE_COALESCING << 16)
-
-enum mhi_pkt_type {
- MHI_PKT_TYPE_INVALID = 0x0,
- MHI_PKT_TYPE_NOOP_CMD = 0x1,
- MHI_PKT_TYPE_TRANSFER = 0x2,
- MHI_PKT_TYPE_COALESCING = 0x8,
- MHI_PKT_TYPE_RESET_CHAN_CMD = 0x10,
- MHI_PKT_TYPE_STOP_CHAN_CMD = 0x11,
- MHI_PKT_TYPE_START_CHAN_CMD = 0x12,
- MHI_PKT_TYPE_STATE_CHANGE_EVENT = 0x20,
- MHI_PKT_TYPE_CMD_COMPLETION_EVENT = 0x21,
- MHI_PKT_TYPE_TX_EVENT = 0x22,
- MHI_PKT_TYPE_RSC_TX_EVENT = 0x28,
- MHI_PKT_TYPE_EE_EVENT = 0x40,
- MHI_PKT_TYPE_TSYNC_EVENT = 0x48,
- MHI_PKT_TYPE_BW_REQ_EVENT = 0x50,
- MHI_PKT_TYPE_STALE_EVENT, /* internal event */
-};
-
-/* MHI transfer completion events */
-enum mhi_ev_ccs {
- MHI_EV_CC_INVALID = 0x0,
- MHI_EV_CC_SUCCESS = 0x1,
- MHI_EV_CC_EOT = 0x2, /* End of transfer event */
- MHI_EV_CC_OVERFLOW = 0x3,
- MHI_EV_CC_EOB = 0x4, /* End of block event */
- MHI_EV_CC_OOB = 0x5, /* Out of block event */
- MHI_EV_CC_DB_MODE = 0x6,
- MHI_EV_CC_UNDEFINED_ERR = 0x10,
- MHI_EV_CC_BAD_TRE = 0x11,
-};
-
-enum mhi_ch_state {
- MHI_CH_STATE_DISABLED = 0x0,
- MHI_CH_STATE_ENABLED = 0x1,
- MHI_CH_STATE_RUNNING = 0x2,
- MHI_CH_STATE_SUSPENDED = 0x3,
- MHI_CH_STATE_STOP = 0x4,
- MHI_CH_STATE_ERROR = 0x5,
-};
-
-#define MHI_INVALID_BRSTMODE(mode) (mode != MHI_DB_BRST_DISABLE && \
- mode != MHI_DB_BRST_ENABLE)
-
-extern const char * const mhi_ee_str[MHI_EE_MAX];
-#define TO_MHI_EXEC_STR(ee) (((ee) >= MHI_EE_MAX) ? \
- "INVALID_EE" : mhi_ee_str[ee])
-
-#define MHI_IN_PBL(ee) (ee == MHI_EE_PBL || ee == MHI_EE_PTHRU || \
- ee == MHI_EE_EDL)
-
-#define MHI_IN_MISSION_MODE(ee) (ee == MHI_EE_AMSS || ee == MHI_EE_WFW)
-
-enum dev_st_transition {
- DEV_ST_TRANSITION_PBL,
- DEV_ST_TRANSITION_READY,
- DEV_ST_TRANSITION_SBL,
- DEV_ST_TRANSITION_MISSION_MODE,
- DEV_ST_TRANSITION_SYS_ERR,
- DEV_ST_TRANSITION_DISABLE,
- DEV_ST_TRANSITION_MAX,
-};
-
-extern const char * const dev_state_tran_str[DEV_ST_TRANSITION_MAX];
-#define TO_DEV_STATE_TRANS_STR(state) (((state) >= DEV_ST_TRANSITION_MAX) ? \
- "INVALID_STATE" : dev_state_tran_str[state])
-
-extern const char * const mhi_state_str[MHI_STATE_MAX];
-#define TO_MHI_STATE_STR(state) ((state >= MHI_STATE_MAX || \
- !mhi_state_str[state]) ? \
- "INVALID_STATE" : mhi_state_str[state])
-
-/* internal power states */
-enum mhi_pm_state {
- MHI_PM_STATE_DISABLE,
- MHI_PM_STATE_POR,
- MHI_PM_STATE_M0,
- MHI_PM_STATE_M2,
- MHI_PM_STATE_M3_ENTER,
- MHI_PM_STATE_M3,
- MHI_PM_STATE_M3_EXIT,
- MHI_PM_STATE_FW_DL_ERR,
- MHI_PM_STATE_SYS_ERR_DETECT,
- MHI_PM_STATE_SYS_ERR_PROCESS,
- MHI_PM_STATE_SHUTDOWN_PROCESS,
- MHI_PM_STATE_LD_ERR_FATAL_DETECT,
- MHI_PM_STATE_MAX
-};
-
-#define MHI_PM_DISABLE BIT(0)
-#define MHI_PM_POR BIT(1)
-#define MHI_PM_M0 BIT(2)
-#define MHI_PM_M2 BIT(3)
-#define MHI_PM_M3_ENTER BIT(4)
-#define MHI_PM_M3 BIT(5)
-#define MHI_PM_M3_EXIT BIT(6)
-/* firmware download failure state */
-#define MHI_PM_FW_DL_ERR BIT(7)
-#define MHI_PM_SYS_ERR_DETECT BIT(8)
-#define MHI_PM_SYS_ERR_PROCESS BIT(9)
-#define MHI_PM_SHUTDOWN_PROCESS BIT(10)
-/* link not accessible */
-#define MHI_PM_LD_ERR_FATAL_DETECT BIT(11)
-
-#define MHI_REG_ACCESS_VALID(pm_state) ((pm_state & (MHI_PM_POR | MHI_PM_M0 | \
- MHI_PM_M2 | MHI_PM_M3_ENTER | MHI_PM_M3_EXIT | \
- MHI_PM_SYS_ERR_DETECT | MHI_PM_SYS_ERR_PROCESS | \
- MHI_PM_SHUTDOWN_PROCESS | MHI_PM_FW_DL_ERR)))
-#define MHI_PM_IN_ERROR_STATE(pm_state) (pm_state >= MHI_PM_FW_DL_ERR)
-#define MHI_PM_IN_FATAL_STATE(pm_state) (pm_state == MHI_PM_LD_ERR_FATAL_DETECT)
-#define MHI_DB_ACCESS_VALID(mhi_cntrl) (mhi_cntrl->pm_state & \
- mhi_cntrl->db_access)
-#define MHI_WAKE_DB_CLEAR_VALID(pm_state) (pm_state & (MHI_PM_M0 | \
- MHI_PM_M2 | MHI_PM_M3_EXIT))
-#define MHI_WAKE_DB_SET_VALID(pm_state) (pm_state & MHI_PM_M2)
-#define MHI_WAKE_DB_FORCE_SET_VALID(pm_state) MHI_WAKE_DB_CLEAR_VALID(pm_state)
-#define MHI_EVENT_ACCESS_INVALID(pm_state) (pm_state == MHI_PM_DISABLE || \
- MHI_PM_IN_ERROR_STATE(pm_state))
-#define MHI_PM_IN_SUSPEND_STATE(pm_state) (pm_state & \
- (MHI_PM_M3_ENTER | MHI_PM_M3))
-
-#define NR_OF_CMD_RINGS 1
-#define CMD_EL_PER_RING 128
-#define PRIMARY_CMD_RING 0
-#define MHI_DEV_WAKE_DB 127
-#define MHI_MAX_MTU 0xffff
-#define MHI_RANDOM_U32_NONZERO(bmsk) (prandom_u32_max(bmsk) + 1)
-
-enum mhi_er_type {
- MHI_ER_TYPE_INVALID = 0x0,
- MHI_ER_TYPE_VALID = 0x1,
-};
-
-struct db_cfg {
- bool reset_req;
- bool db_mode;
- u32 pollcfg;
- enum mhi_db_brst_mode brstmode;
- dma_addr_t db_val;
- void (*process_db)(struct mhi_controller *mhi_cntrl,
- struct db_cfg *db_cfg, void __iomem *io_addr,
- dma_addr_t db_val);
-};
-
-struct mhi_pm_transitions {
- enum mhi_pm_state from_state;
- u32 to_states;
-};
-
-struct state_transition {
- struct list_head node;
- enum dev_st_transition state;
-};
-
-struct mhi_ring {
- dma_addr_t dma_handle;
- dma_addr_t iommu_base;
- u64 *ctxt_wp; /* point to ctxt wp */
- void *pre_aligned;
- void *base;
- void *rp;
- void *wp;
- size_t el_size;
- size_t len;
- size_t elements;
- size_t alloc_size;
- void __iomem *db_addr;
-};
-
-struct mhi_cmd {
- struct mhi_ring ring;
- spinlock_t lock;
-};
-
-struct mhi_buf_info {
- void *v_addr;
- void *bb_addr;
- void *wp;
- void *cb_buf;
- dma_addr_t p_addr;
- size_t len;
- enum dma_data_direction dir;
- bool used; /* Indicates whether the buffer is used or not */
- bool pre_mapped; /* Already pre-mapped by client */
-};
-
-struct mhi_event {
- struct mhi_controller *mhi_cntrl;
- struct mhi_chan *mhi_chan; /* dedicated to channel */
- u32 er_index;
- u32 intmod;
- u32 irq;
- int chan; /* this event ring is dedicated to a channel (optional) */
- u32 priority;
- enum mhi_er_data_type data_type;
- struct mhi_ring ring;
- struct db_cfg db_cfg;
- struct tasklet_struct task;
- spinlock_t lock;
- int (*process_event)(struct mhi_controller *mhi_cntrl,
- struct mhi_event *mhi_event,
- u32 event_quota);
- bool hw_ring;
- bool cl_manage;
- bool offload_ev; /* managed by a device driver */
-};
-
-struct mhi_chan {
- const char *name;
- /*
- * Important: When consuming, increment tre_ring first and when
- * releasing, decrement buf_ring first. If tre_ring has space, buf_ring
- * is guranteed to have space so we do not need to check both rings.
- */
- struct mhi_ring buf_ring;
- struct mhi_ring tre_ring;
- u32 chan;
- u32 er_index;
- u32 intmod;
- enum mhi_ch_type type;
- enum dma_data_direction dir;
- struct db_cfg db_cfg;
- enum mhi_ch_ee_mask ee_mask;
- enum mhi_ch_state ch_state;
- enum mhi_ev_ccs ccs;
- struct mhi_device *mhi_dev;
- void (*xfer_cb)(struct mhi_device *mhi_dev, struct mhi_result *result);
- struct mutex mutex;
- struct completion completion;
- rwlock_t lock;
- struct list_head node;
- bool lpm_notify;
- bool configured;
- bool offload_ch;
- bool pre_alloc;
- bool auto_start;
- bool wake_capable;
-};
-
-/* Default MHI timeout */
-#define MHI_TIMEOUT_MS (1000)
-
-/* debugfs related functions */
-#ifdef CONFIG_MHI_BUS_DEBUG
-void mhi_create_debugfs(struct mhi_controller *mhi_cntrl);
-void mhi_destroy_debugfs(struct mhi_controller *mhi_cntrl);
-void mhi_debugfs_init(void);
-void mhi_debugfs_exit(void);
-#else
-static inline void mhi_create_debugfs(struct mhi_controller *mhi_cntrl)
-{
-}
-
-static inline void mhi_destroy_debugfs(struct mhi_controller *mhi_cntrl)
-{
-}
-
-static inline void mhi_debugfs_init(void)
-{
-}
-
-static inline void mhi_debugfs_exit(void)
-{
-}
-#endif
-
-struct mhi_device *mhi_alloc_device(struct mhi_controller *mhi_cntrl);
-
-int mhi_destroy_device(struct device *dev, void *data);
-void mhi_create_devices(struct mhi_controller *mhi_cntrl);
-
-int mhi_alloc_bhie_table(struct mhi_controller *mhi_cntrl,
- struct image_info **image_info, size_t alloc_size);
-void mhi_free_bhie_table(struct mhi_controller *mhi_cntrl,
- struct image_info *image_info);
-
-/* Power management APIs */
-enum mhi_pm_state __must_check mhi_tryset_pm_state(
- struct mhi_controller *mhi_cntrl,
- enum mhi_pm_state state);
-const char *to_mhi_pm_state_str(enum mhi_pm_state state);
-enum mhi_ee_type mhi_get_exec_env(struct mhi_controller *mhi_cntrl);
-int mhi_queue_state_transition(struct mhi_controller *mhi_cntrl,
- enum dev_st_transition state);
-void mhi_pm_st_worker(struct work_struct *work);
-void mhi_pm_sys_err_handler(struct mhi_controller *mhi_cntrl);
-void mhi_fw_load_worker(struct work_struct *work);
-int mhi_ready_state_transition(struct mhi_controller *mhi_cntrl);
-int mhi_pm_m0_transition(struct mhi_controller *mhi_cntrl);
-void mhi_pm_m1_transition(struct mhi_controller *mhi_cntrl);
-int mhi_pm_m3_transition(struct mhi_controller *mhi_cntrl);
-int __mhi_device_get_sync(struct mhi_controller *mhi_cntrl);
-int mhi_send_cmd(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan,
- enum mhi_cmd_type cmd);
-static inline bool mhi_is_active(struct mhi_controller *mhi_cntrl)
-{
- return (mhi_cntrl->dev_state >= MHI_STATE_M0 &&
- mhi_cntrl->dev_state <= MHI_STATE_M3_FAST);
-}
-
-static inline void mhi_trigger_resume(struct mhi_controller *mhi_cntrl)
-{
- pm_wakeup_event(&mhi_cntrl->mhi_dev->dev, 0);
- mhi_cntrl->runtime_get(mhi_cntrl);
- mhi_cntrl->runtime_put(mhi_cntrl);
-}
-
-/* Register access methods */
-void mhi_db_brstmode(struct mhi_controller *mhi_cntrl, struct db_cfg *db_cfg,
- void __iomem *db_addr, dma_addr_t db_val);
-void mhi_db_brstmode_disable(struct mhi_controller *mhi_cntrl,
- struct db_cfg *db_mode, void __iomem *db_addr,
- dma_addr_t db_val);
-int __must_check mhi_read_reg(struct mhi_controller *mhi_cntrl,
- void __iomem *base, u32 offset, u32 *out);
-int __must_check mhi_read_reg_field(struct mhi_controller *mhi_cntrl,
- void __iomem *base, u32 offset, u32 mask,
- u32 shift, u32 *out);
-void mhi_write_reg(struct mhi_controller *mhi_cntrl, void __iomem *base,
- u32 offset, u32 val);
-void mhi_write_reg_field(struct mhi_controller *mhi_cntrl, void __iomem *base,
- u32 offset, u32 mask, u32 shift, u32 val);
-void mhi_ring_er_db(struct mhi_event *mhi_event);
-void mhi_write_db(struct mhi_controller *mhi_cntrl, void __iomem *db_addr,
- dma_addr_t db_val);
-void mhi_ring_cmd_db(struct mhi_controller *mhi_cntrl, struct mhi_cmd *mhi_cmd);
-void mhi_ring_chan_db(struct mhi_controller *mhi_cntrl,
- struct mhi_chan *mhi_chan);
-
-/* Initialization methods */
-int mhi_init_mmio(struct mhi_controller *mhi_cntrl);
-int mhi_init_dev_ctxt(struct mhi_controller *mhi_cntrl);
-void mhi_deinit_dev_ctxt(struct mhi_controller *mhi_cntrl);
-int mhi_init_irq_setup(struct mhi_controller *mhi_cntrl);
-void mhi_deinit_free_irq(struct mhi_controller *mhi_cntrl);
-void mhi_rddm_prepare(struct mhi_controller *mhi_cntrl,
- struct image_info *img_info);
-void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl);
-int mhi_prepare_channel(struct mhi_controller *mhi_cntrl,
- struct mhi_chan *mhi_chan);
-int mhi_init_chan_ctxt(struct mhi_controller *mhi_cntrl,
- struct mhi_chan *mhi_chan);
-void mhi_deinit_chan_ctxt(struct mhi_controller *mhi_cntrl,
- struct mhi_chan *mhi_chan);
-void mhi_reset_chan(struct mhi_controller *mhi_cntrl,
- struct mhi_chan *mhi_chan);
-
-/* Memory allocation methods */
-static inline void *mhi_alloc_coherent(struct mhi_controller *mhi_cntrl,
- size_t size,
- dma_addr_t *dma_handle,
- gfp_t gfp)
-{
- void *buf = dma_alloc_coherent(mhi_cntrl->cntrl_dev, size, dma_handle,
- gfp);
-
- return buf;
-}
-
-static inline void mhi_free_coherent(struct mhi_controller *mhi_cntrl,
- size_t size,
- void *vaddr,
- dma_addr_t dma_handle)
-{
- dma_free_coherent(mhi_cntrl->cntrl_dev, size, vaddr, dma_handle);
-}
-
-/* Event processing methods */
-void mhi_ctrl_ev_task(unsigned long data);
-void mhi_ev_task(unsigned long data);
-int mhi_process_data_event_ring(struct mhi_controller *mhi_cntrl,
- struct mhi_event *mhi_event, u32 event_quota);
-int mhi_process_ctrl_ev_ring(struct mhi_controller *mhi_cntrl,
- struct mhi_event *mhi_event, u32 event_quota);
-
-/* ISR handlers */
-irqreturn_t mhi_irq_handler(int irq_number, void *dev);
-irqreturn_t mhi_intvec_threaded_handler(int irq_number, void *dev);
-irqreturn_t mhi_intvec_handler(int irq_number, void *dev);
-
-int mhi_gen_tre(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan,
- struct mhi_buf_info *info, enum mhi_flags flags);
-int mhi_map_single_no_bb(struct mhi_controller *mhi_cntrl,
- struct mhi_buf_info *buf_info);
-int mhi_map_single_use_bb(struct mhi_controller *mhi_cntrl,
- struct mhi_buf_info *buf_info);
-void mhi_unmap_single_no_bb(struct mhi_controller *mhi_cntrl,
- struct mhi_buf_info *buf_info);
-void mhi_unmap_single_use_bb(struct mhi_controller *mhi_cntrl,
- struct mhi_buf_info *buf_info);
-
-#endif /* _MHI_INT_H */
diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c
deleted file mode 100644
index 614dd287cb4f..000000000000
--- a/drivers/bus/mhi/core/main.c
+++ /dev/null
@@ -1,1630 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
- *
- */
-
-#include <linux/device.h>
-#include <linux/dma-direction.h>
-#include <linux/dma-mapping.h>
-#include <linux/interrupt.h>
-#include <linux/list.h>
-#include <linux/mhi.h>
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/slab.h>
-#include "internal.h"
-
-int __must_check mhi_read_reg(struct mhi_controller *mhi_cntrl,
- void __iomem *base, u32 offset, u32 *out)
-{
- return mhi_cntrl->read_reg(mhi_cntrl, base + offset, out);
-}
-
-int __must_check mhi_read_reg_field(struct mhi_controller *mhi_cntrl,
- void __iomem *base, u32 offset,
- u32 mask, u32 shift, u32 *out)
-{
- u32 tmp;
- int ret;
-
- ret = mhi_read_reg(mhi_cntrl, base, offset, &tmp);
- if (ret)
- return ret;
-
- *out = (tmp & mask) >> shift;
-
- return 0;
-}
-
-void mhi_write_reg(struct mhi_controller *mhi_cntrl, void __iomem *base,
- u32 offset, u32 val)
-{
- mhi_cntrl->write_reg(mhi_cntrl, base + offset, val);
-}
-
-void mhi_write_reg_field(struct mhi_controller *mhi_cntrl, void __iomem *base,
- u32 offset, u32 mask, u32 shift, u32 val)
-{
- int ret;
- u32 tmp;
-
- ret = mhi_read_reg(mhi_cntrl, base, offset, &tmp);
- if (ret)
- return;
-
- tmp &= ~mask;
- tmp |= (val << shift);
- mhi_write_reg(mhi_cntrl, base, offset, tmp);
-}
-
-void mhi_write_db(struct mhi_controller *mhi_cntrl, void __iomem *db_addr,
- dma_addr_t db_val)
-{
- mhi_write_reg(mhi_cntrl, db_addr, 4, upper_32_bits(db_val));
- mhi_write_reg(mhi_cntrl, db_addr, 0, lower_32_bits(db_val));
-}
-
-void mhi_db_brstmode(struct mhi_controller *mhi_cntrl,
- struct db_cfg *db_cfg,
- void __iomem *db_addr,
- dma_addr_t db_val)
-{
- if (db_cfg->db_mode) {
- db_cfg->db_val = db_val;
- mhi_write_db(mhi_cntrl, db_addr, db_val);
- db_cfg->db_mode = 0;
- }
-}
-
-void mhi_db_brstmode_disable(struct mhi_controller *mhi_cntrl,
- struct db_cfg *db_cfg,
- void __iomem *db_addr,
- dma_addr_t db_val)
-{
- db_cfg->db_val = db_val;
- mhi_write_db(mhi_cntrl, db_addr, db_val);
-}
-
-void mhi_ring_er_db(struct mhi_event *mhi_event)
-{
- struct mhi_ring *ring = &mhi_event->ring;
-
- mhi_event->db_cfg.process_db(mhi_event->mhi_cntrl, &mhi_event->db_cfg,
- ring->db_addr, *ring->ctxt_wp);
-}
-
-void mhi_ring_cmd_db(struct mhi_controller *mhi_cntrl, struct mhi_cmd *mhi_cmd)
-{
- dma_addr_t db;
- struct mhi_ring *ring = &mhi_cmd->ring;
-
- db = ring->iommu_base + (ring->wp - ring->base);
- *ring->ctxt_wp = db;
- mhi_write_db(mhi_cntrl, ring->db_addr, db);
-}
-
-void mhi_ring_chan_db(struct mhi_controller *mhi_cntrl,
- struct mhi_chan *mhi_chan)
-{
- struct mhi_ring *ring = &mhi_chan->tre_ring;
- dma_addr_t db;
-
- db = ring->iommu_base + (ring->wp - ring->base);
- *ring->ctxt_wp = db;
- mhi_chan->db_cfg.process_db(mhi_cntrl, &mhi_chan->db_cfg,
- ring->db_addr, db);
-}
-
-enum mhi_ee_type mhi_get_exec_env(struct mhi_controller *mhi_cntrl)
-{
- u32 exec;
- int ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_EXECENV, &exec);
-
- return (ret) ? MHI_EE_MAX : exec;
-}
-
-enum mhi_state mhi_get_mhi_state(struct mhi_controller *mhi_cntrl)
-{
- u32 state;
- int ret = mhi_read_reg_field(mhi_cntrl, mhi_cntrl->regs, MHISTATUS,
- MHISTATUS_MHISTATE_MASK,
- MHISTATUS_MHISTATE_SHIFT, &state);
- return ret ? MHI_STATE_MAX : state;
-}
-
-int mhi_map_single_no_bb(struct mhi_controller *mhi_cntrl,
- struct mhi_buf_info *buf_info)
-{
- buf_info->p_addr = dma_map_single(mhi_cntrl->cntrl_dev,
- buf_info->v_addr, buf_info->len,
- buf_info->dir);
- if (dma_mapping_error(mhi_cntrl->cntrl_dev, buf_info->p_addr))
- return -ENOMEM;
-
- return 0;
-}
-
-int mhi_map_single_use_bb(struct mhi_controller *mhi_cntrl,
- struct mhi_buf_info *buf_info)
-{
- void *buf = mhi_alloc_coherent(mhi_cntrl, buf_info->len,
- &buf_info->p_addr, GFP_ATOMIC);
-
- if (!buf)
- return -ENOMEM;
-
- if (buf_info->dir == DMA_TO_DEVICE)
- memcpy(buf, buf_info->v_addr, buf_info->len);
-
- buf_info->bb_addr = buf;
-
- return 0;
-}
-
-void mhi_unmap_single_no_bb(struct mhi_controller *mhi_cntrl,
- struct mhi_buf_info *buf_info)
-{
- dma_unmap_single(mhi_cntrl->cntrl_dev, buf_info->p_addr, buf_info->len,
- buf_info->dir);
-}
-
-void mhi_unmap_single_use_bb(struct mhi_controller *mhi_cntrl,
- struct mhi_buf_info *buf_info)
-{
- if (buf_info->dir == DMA_FROM_DEVICE)
- memcpy(buf_info->v_addr, buf_info->bb_addr, buf_info->len);
-
- mhi_free_coherent(mhi_cntrl, buf_info->len, buf_info->bb_addr,
- buf_info->p_addr);
-}
-
-static int get_nr_avail_ring_elements(struct mhi_controller *mhi_cntrl,
- struct mhi_ring *ring)
-{
- int nr_el;
-
- if (ring->wp < ring->rp) {
- nr_el = ((ring->rp - ring->wp) / ring->el_size) - 1;
- } else {
- nr_el = (ring->rp - ring->base) / ring->el_size;
- nr_el += ((ring->base + ring->len - ring->wp) /
- ring->el_size) - 1;
- }
-
- return nr_el;
-}
-
-static void *mhi_to_virtual(struct mhi_ring *ring, dma_addr_t addr)
-{
- return (addr - ring->iommu_base) + ring->base;
-}
-
-static void mhi_add_ring_element(struct mhi_controller *mhi_cntrl,
- struct mhi_ring *ring)
-{
- ring->wp += ring->el_size;
- if (ring->wp >= (ring->base + ring->len))
- ring->wp = ring->base;
- /* smp update */
- smp_wmb();
-}
-
-static void mhi_del_ring_element(struct mhi_controller *mhi_cntrl,
- struct mhi_ring *ring)
-{
- ring->rp += ring->el_size;
- if (ring->rp >= (ring->base + ring->len))
- ring->rp = ring->base;
- /* smp update */
- smp_wmb();
-}
-
-static bool is_valid_ring_ptr(struct mhi_ring *ring, dma_addr_t addr)
-{
- return addr >= ring->iommu_base && addr < ring->iommu_base + ring->len;
-}
-
-int mhi_destroy_device(struct device *dev, void *data)
-{
- struct mhi_chan *ul_chan, *dl_chan;
- struct mhi_device *mhi_dev;
- struct mhi_controller *mhi_cntrl;
- enum mhi_ee_type ee = MHI_EE_MAX;
-
- if (dev->bus != &mhi_bus_type)
- return 0;
-
- mhi_dev = to_mhi_device(dev);
- mhi_cntrl = mhi_dev->mhi_cntrl;
-
- /* Only destroy virtual devices thats attached to bus */
- if (mhi_dev->dev_type == MHI_DEVICE_CONTROLLER)
- return 0;
-
- ul_chan = mhi_dev->ul_chan;
- dl_chan = mhi_dev->dl_chan;
-
- /*
- * If execution environment is specified, remove only those devices that
- * started in them based on ee_mask for the channels as we move on to a
- * different execution environment
- */
- if (data)
- ee = *(enum mhi_ee_type *)data;
-
- /*
- * For the suspend and resume case, this function will get called
- * without mhi_unregister_controller(). Hence, we need to drop the
- * references to mhi_dev created for ul and dl channels. We can
- * be sure that there will be no instances of mhi_dev left after
- * this.
- */
- if (ul_chan) {
- if (ee != MHI_EE_MAX && !(ul_chan->ee_mask & BIT(ee)))
- return 0;
-
- put_device(&ul_chan->mhi_dev->dev);
- }
-
- if (dl_chan) {
- if (ee != MHI_EE_MAX && !(dl_chan->ee_mask & BIT(ee)))
- return 0;
-
- put_device(&dl_chan->mhi_dev->dev);
- }
-
- dev_dbg(&mhi_cntrl->mhi_dev->dev, "destroy device for chan:%s\n",
- mhi_dev->name);
-
- /* Notify the client and remove the device from MHI bus */
- device_del(dev);
- put_device(dev);
-
- return 0;
-}
-
-void mhi_notify(struct mhi_device *mhi_dev, enum mhi_callback cb_reason)
-{
- struct mhi_driver *mhi_drv;
-
- if (!mhi_dev->dev.driver)
- return;
-
- mhi_drv = to_mhi_driver(mhi_dev->dev.driver);
-
- if (mhi_drv->status_cb)
- mhi_drv->status_cb(mhi_dev, cb_reason);
-}
-EXPORT_SYMBOL_GPL(mhi_notify);
-
-/* Bind MHI channels to MHI devices */
-void mhi_create_devices(struct mhi_controller *mhi_cntrl)
-{
- struct mhi_chan *mhi_chan;
- struct mhi_device *mhi_dev;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- int i, ret;
-
- mhi_chan = mhi_cntrl->mhi_chan;
- for (i = 0; i < mhi_cntrl->max_chan; i++, mhi_chan++) {
- if (!mhi_chan->configured || mhi_chan->mhi_dev ||
- !(mhi_chan->ee_mask & BIT(mhi_cntrl->ee)))
- continue;
- mhi_dev = mhi_alloc_device(mhi_cntrl);
- if (IS_ERR(mhi_dev))
- return;
-
- mhi_dev->dev_type = MHI_DEVICE_XFER;
- switch (mhi_chan->dir) {
- case DMA_TO_DEVICE:
- mhi_dev->ul_chan = mhi_chan;
- mhi_dev->ul_chan_id = mhi_chan->chan;
- break;
- case DMA_FROM_DEVICE:
- /* We use dl_chan as offload channels */
- mhi_dev->dl_chan = mhi_chan;
- mhi_dev->dl_chan_id = mhi_chan->chan;
- break;
- default:
- dev_err(dev, "Direction not supported\n");
- put_device(&mhi_dev->dev);
- return;
- }
-
- get_device(&mhi_dev->dev);
- mhi_chan->mhi_dev = mhi_dev;
-
- /* Check next channel if it matches */
- if ((i + 1) < mhi_cntrl->max_chan && mhi_chan[1].configured) {
- if (!strcmp(mhi_chan[1].name, mhi_chan->name)) {
- i++;
- mhi_chan++;
- if (mhi_chan->dir == DMA_TO_DEVICE) {
- mhi_dev->ul_chan = mhi_chan;
- mhi_dev->ul_chan_id = mhi_chan->chan;
- } else {
- mhi_dev->dl_chan = mhi_chan;
- mhi_dev->dl_chan_id = mhi_chan->chan;
- }
- get_device(&mhi_dev->dev);
- mhi_chan->mhi_dev = mhi_dev;
- }
- }
-
- /* Channel name is same for both UL and DL */
- mhi_dev->name = mhi_chan->name;
- dev_set_name(&mhi_dev->dev, "%s_%s",
- dev_name(mhi_cntrl->cntrl_dev),
- mhi_dev->name);
-
- /* Init wakeup source if available */
- if (mhi_dev->dl_chan && mhi_dev->dl_chan->wake_capable)
- device_init_wakeup(&mhi_dev->dev, true);
-
- ret = device_add(&mhi_dev->dev);
- if (ret)
- put_device(&mhi_dev->dev);
- }
-}
-
-irqreturn_t mhi_irq_handler(int irq_number, void *dev)
-{
- struct mhi_event *mhi_event = dev;
- struct mhi_controller *mhi_cntrl = mhi_event->mhi_cntrl;
- struct mhi_event_ctxt *er_ctxt =
- &mhi_cntrl->mhi_ctxt->er_ctxt[mhi_event->er_index];
- struct mhi_ring *ev_ring = &mhi_event->ring;
- dma_addr_t ptr = er_ctxt->rp;
- void *dev_rp;
-
- if (!is_valid_ring_ptr(ev_ring, ptr)) {
- dev_err(&mhi_cntrl->mhi_dev->dev,
- "Event ring rp points outside of the event ring\n");
- return IRQ_HANDLED;
- }
-
- dev_rp = mhi_to_virtual(ev_ring, ptr);
-
- /* Only proceed if event ring has pending events */
- if (ev_ring->rp == dev_rp)
- return IRQ_HANDLED;
-
- /* For client managed event ring, notify pending data */
- if (mhi_event->cl_manage) {
- struct mhi_chan *mhi_chan = mhi_event->mhi_chan;
- struct mhi_device *mhi_dev = mhi_chan->mhi_dev;
-
- if (mhi_dev)
- mhi_notify(mhi_dev, MHI_CB_PENDING_DATA);
- } else {
- tasklet_schedule(&mhi_event->task);
- }
-
- return IRQ_HANDLED;
-}
-
-irqreturn_t mhi_intvec_threaded_handler(int irq_number, void *priv)
-{
- struct mhi_controller *mhi_cntrl = priv;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- enum mhi_state state = MHI_STATE_MAX;
- enum mhi_pm_state pm_state = 0;
- enum mhi_ee_type ee = 0;
-
- write_lock_irq(&mhi_cntrl->pm_lock);
- if (!MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state)) {
- write_unlock_irq(&mhi_cntrl->pm_lock);
- goto exit_intvec;
- }
-
- state = mhi_get_mhi_state(mhi_cntrl);
- ee = mhi_cntrl->ee;
- mhi_cntrl->ee = mhi_get_exec_env(mhi_cntrl);
- dev_dbg(dev, "local ee:%s device ee:%s dev_state:%s\n",
- TO_MHI_EXEC_STR(mhi_cntrl->ee), TO_MHI_EXEC_STR(ee),
- TO_MHI_STATE_STR(state));
-
- if (state == MHI_STATE_SYS_ERR) {
- dev_dbg(dev, "System error detected\n");
- pm_state = mhi_tryset_pm_state(mhi_cntrl,
- MHI_PM_SYS_ERR_DETECT);
- }
- write_unlock_irq(&mhi_cntrl->pm_lock);
-
- /* If device supports RDDM don't bother processing SYS error */
- if (mhi_cntrl->rddm_image) {
- if (mhi_cntrl->ee == MHI_EE_RDDM && mhi_cntrl->ee != ee) {
- mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_EE_RDDM);
- wake_up_all(&mhi_cntrl->state_event);
- }
- goto exit_intvec;
- }
-
- if (pm_state == MHI_PM_SYS_ERR_DETECT) {
- wake_up_all(&mhi_cntrl->state_event);
-
- /* For fatal errors, we let controller decide next step */
- if (MHI_IN_PBL(ee))
- mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_FATAL_ERROR);
- else
- mhi_pm_sys_err_handler(mhi_cntrl);
- }
-
-exit_intvec:
-
- return IRQ_HANDLED;
-}
-
-irqreturn_t mhi_intvec_handler(int irq_number, void *dev)
-{
- struct mhi_controller *mhi_cntrl = dev;
-
- /* Wake up events waiting for state change */
- wake_up_all(&mhi_cntrl->state_event);
-
- return IRQ_WAKE_THREAD;
-}
-
-static void mhi_recycle_ev_ring_element(struct mhi_controller *mhi_cntrl,
- struct mhi_ring *ring)
-{
- dma_addr_t ctxt_wp;
-
- /* Update the WP */
- ring->wp += ring->el_size;
- ctxt_wp = *ring->ctxt_wp + ring->el_size;
-
- if (ring->wp >= (ring->base + ring->len)) {
- ring->wp = ring->base;
- ctxt_wp = ring->iommu_base;
- }
-
- *ring->ctxt_wp = ctxt_wp;
-
- /* Update the RP */
- ring->rp += ring->el_size;
- if (ring->rp >= (ring->base + ring->len))
- ring->rp = ring->base;
-
- /* Update to all cores */
- smp_wmb();
-}
-
-static int parse_xfer_event(struct mhi_controller *mhi_cntrl,
- struct mhi_tre *event,
- struct mhi_chan *mhi_chan)
-{
- struct mhi_ring *buf_ring, *tre_ring;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- struct mhi_result result;
- unsigned long flags = 0;
- u32 ev_code;
-
- ev_code = MHI_TRE_GET_EV_CODE(event);
- buf_ring = &mhi_chan->buf_ring;
- tre_ring = &mhi_chan->tre_ring;
-
- result.transaction_status = (ev_code == MHI_EV_CC_OVERFLOW) ?
- -EOVERFLOW : 0;
-
- /*
- * If it's a DB Event then we need to grab the lock
- * with preemption disabled and as a write because we
- * have to update db register and there are chances that
- * another thread could be doing the same.
- */
- if (ev_code >= MHI_EV_CC_OOB)
- write_lock_irqsave(&mhi_chan->lock, flags);
- else
- read_lock_bh(&mhi_chan->lock);
-
- if (mhi_chan->ch_state != MHI_CH_STATE_ENABLED)
- goto end_process_tx_event;
-
- switch (ev_code) {
- case MHI_EV_CC_OVERFLOW:
- case MHI_EV_CC_EOB:
- case MHI_EV_CC_EOT:
- {
- dma_addr_t ptr = MHI_TRE_GET_EV_PTR(event);
- struct mhi_tre *local_rp, *ev_tre;
- void *dev_rp;
- struct mhi_buf_info *buf_info;
- u16 xfer_len;
-
- if (!is_valid_ring_ptr(tre_ring, ptr)) {
- dev_err(&mhi_cntrl->mhi_dev->dev,
- "Event element points outside of the tre ring\n");
- break;
- }
- /* Get the TRB this event points to */
- ev_tre = mhi_to_virtual(tre_ring, ptr);
-
- dev_rp = ev_tre + 1;
- if (dev_rp >= (tre_ring->base + tre_ring->len))
- dev_rp = tre_ring->base;
-
- result.dir = mhi_chan->dir;
-
- local_rp = tre_ring->rp;
- while (local_rp != dev_rp) {
- buf_info = buf_ring->rp;
- /* If it's the last TRE, get length from the event */
- if (local_rp == ev_tre)
- xfer_len = MHI_TRE_GET_EV_LEN(event);
- else
- xfer_len = buf_info->len;
-
- /* Unmap if it's not pre-mapped by client */
- if (likely(!buf_info->pre_mapped))
- mhi_cntrl->unmap_single(mhi_cntrl, buf_info);
-
- result.buf_addr = buf_info->cb_buf;
-
- /* truncate to buf len if xfer_len is larger */
- result.bytes_xferd =
- min_t(u16, xfer_len, buf_info->len);
- mhi_del_ring_element(mhi_cntrl, buf_ring);
- mhi_del_ring_element(mhi_cntrl, tre_ring);
- local_rp = tre_ring->rp;
-
- /* notify client */
- mhi_chan->xfer_cb(mhi_chan->mhi_dev, &result);
-
- if (mhi_chan->dir == DMA_TO_DEVICE)
- atomic_dec(&mhi_cntrl->pending_pkts);
-
- /*
- * Recycle the buffer if buffer is pre-allocated,
- * if there is an error, not much we can do apart
- * from dropping the packet
- */
- if (mhi_chan->pre_alloc) {
- if (mhi_queue_buf(mhi_chan->mhi_dev,
- mhi_chan->dir,
- buf_info->cb_buf,
- buf_info->len, MHI_EOT)) {
- dev_err(dev,
- "Error recycling buffer for chan:%d\n",
- mhi_chan->chan);
- kfree(buf_info->cb_buf);
- }
- }
- }
- break;
- } /* CC_EOT */
- case MHI_EV_CC_OOB:
- case MHI_EV_CC_DB_MODE:
- {
- unsigned long flags;
-
- mhi_chan->db_cfg.db_mode = 1;
- read_lock_irqsave(&mhi_cntrl->pm_lock, flags);
- if (tre_ring->wp != tre_ring->rp &&
- MHI_DB_ACCESS_VALID(mhi_cntrl)) {
- mhi_ring_chan_db(mhi_cntrl, mhi_chan);
- }
- read_unlock_irqrestore(&mhi_cntrl->pm_lock, flags);
- break;
- }
- case MHI_EV_CC_BAD_TRE:
- default:
- dev_err(dev, "Unknown event 0x%x\n", ev_code);
- break;
- } /* switch(MHI_EV_READ_CODE(EV_TRB_CODE,event)) */
-
-end_process_tx_event:
- if (ev_code >= MHI_EV_CC_OOB)
- write_unlock_irqrestore(&mhi_chan->lock, flags);
- else
- read_unlock_bh(&mhi_chan->lock);
-
- return 0;
-}
-
-static int parse_rsc_event(struct mhi_controller *mhi_cntrl,
- struct mhi_tre *event,
- struct mhi_chan *mhi_chan)
-{
- struct mhi_ring *buf_ring, *tre_ring;
- struct mhi_buf_info *buf_info;
- struct mhi_result result;
- int ev_code;
- u32 cookie; /* offset to local descriptor */
- u16 xfer_len;
-
- buf_ring = &mhi_chan->buf_ring;
- tre_ring = &mhi_chan->tre_ring;
-
- ev_code = MHI_TRE_GET_EV_CODE(event);
- cookie = MHI_TRE_GET_EV_COOKIE(event);
- xfer_len = MHI_TRE_GET_EV_LEN(event);
-
- /* Received out of bound cookie */
- WARN_ON(cookie >= buf_ring->len);
-
- buf_info = buf_ring->base + cookie;
-
- result.transaction_status = (ev_code == MHI_EV_CC_OVERFLOW) ?
- -EOVERFLOW : 0;
-
- /* truncate to buf len if xfer_len is larger */
- result.bytes_xferd = min_t(u16, xfer_len, buf_info->len);
- result.buf_addr = buf_info->cb_buf;
- result.dir = mhi_chan->dir;
-
- read_lock_bh(&mhi_chan->lock);
-
- if (mhi_chan->ch_state != MHI_CH_STATE_ENABLED)
- goto end_process_rsc_event;
-
- WARN_ON(!buf_info->used);
-
- /* notify the client */
- mhi_chan->xfer_cb(mhi_chan->mhi_dev, &result);
-
- /*
- * Note: We're arbitrarily incrementing RP even though, completion
- * packet we processed might not be the same one, reason we can do this
- * is because device guaranteed to cache descriptors in order it
- * receive, so even though completion event is different we can re-use
- * all descriptors in between.
- * Example:
- * Transfer Ring has descriptors: A, B, C, D
- * Last descriptor host queue is D (WP) and first descriptor
- * host queue is A (RP).
- * The completion event we just serviced is descriptor C.
- * Then we can safely queue descriptors to replace A, B, and C
- * even though host did not receive any completions.
- */
- mhi_del_ring_element(mhi_cntrl, tre_ring);
- buf_info->used = false;
-
-end_process_rsc_event:
- read_unlock_bh(&mhi_chan->lock);
-
- return 0;
-}
-
-static void mhi_process_cmd_completion(struct mhi_controller *mhi_cntrl,
- struct mhi_tre *tre)
-{
- dma_addr_t ptr = MHI_TRE_GET_EV_PTR(tre);
- struct mhi_cmd *cmd_ring = &mhi_cntrl->mhi_cmd[PRIMARY_CMD_RING];
- struct mhi_ring *mhi_ring = &cmd_ring->ring;
- struct mhi_tre *cmd_pkt;
- struct mhi_chan *mhi_chan;
- u32 chan;
-
- if (!is_valid_ring_ptr(mhi_ring, ptr)) {
- dev_err(&mhi_cntrl->mhi_dev->dev,
- "Event element points outside of the cmd ring\n");
- return;
- }
-
- cmd_pkt = mhi_to_virtual(mhi_ring, ptr);
-
- chan = MHI_TRE_GET_CMD_CHID(cmd_pkt);
-
- if (chan < mhi_cntrl->max_chan &&
- mhi_cntrl->mhi_chan[chan].configured) {
- mhi_chan = &mhi_cntrl->mhi_chan[chan];
- write_lock_bh(&mhi_chan->lock);
- mhi_chan->ccs = MHI_TRE_GET_EV_CODE(tre);
- complete(&mhi_chan->completion);
- write_unlock_bh(&mhi_chan->lock);
- } else {
- dev_err(&mhi_cntrl->mhi_dev->dev,
- "Completion packet for invalid channel ID: %d\n", chan);
- }
-
- mhi_del_ring_element(mhi_cntrl, mhi_ring);
-}
-
-int mhi_process_ctrl_ev_ring(struct mhi_controller *mhi_cntrl,
- struct mhi_event *mhi_event,
- u32 event_quota)
-{
- struct mhi_tre *dev_rp, *local_rp;
- struct mhi_ring *ev_ring = &mhi_event->ring;
- struct mhi_event_ctxt *er_ctxt =
- &mhi_cntrl->mhi_ctxt->er_ctxt[mhi_event->er_index];
- struct mhi_chan *mhi_chan;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- u32 chan;
- int count = 0;
- dma_addr_t ptr = er_ctxt->rp;
-
- /*
- * This is a quick check to avoid unnecessary event processing
- * in case MHI is already in error state, but it's still possible
- * to transition to error state while processing events
- */
- if (unlikely(MHI_EVENT_ACCESS_INVALID(mhi_cntrl->pm_state)))
- return -EIO;
-
- if (!is_valid_ring_ptr(ev_ring, ptr)) {
- dev_err(&mhi_cntrl->mhi_dev->dev,
- "Event ring rp points outside of the event ring\n");
- return -EIO;
- }
-
- dev_rp = mhi_to_virtual(ev_ring, ptr);
- local_rp = ev_ring->rp;
-
- while (dev_rp != local_rp) {
- enum mhi_pkt_type type = MHI_TRE_GET_EV_TYPE(local_rp);
-
- switch (type) {
- case MHI_PKT_TYPE_BW_REQ_EVENT:
- {
- struct mhi_link_info *link_info;
-
- link_info = &mhi_cntrl->mhi_link_info;
- write_lock_irq(&mhi_cntrl->pm_lock);
- link_info->target_link_speed =
- MHI_TRE_GET_EV_LINKSPEED(local_rp);
- link_info->target_link_width =
- MHI_TRE_GET_EV_LINKWIDTH(local_rp);
- write_unlock_irq(&mhi_cntrl->pm_lock);
- dev_dbg(dev, "Received BW_REQ event\n");
- mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_BW_REQ);
- break;
- }
- case MHI_PKT_TYPE_STATE_CHANGE_EVENT:
- {
- enum mhi_state new_state;
-
- new_state = MHI_TRE_GET_EV_STATE(local_rp);
-
- dev_dbg(dev, "State change event to state: %s\n",
- TO_MHI_STATE_STR(new_state));
-
- switch (new_state) {
- case MHI_STATE_M0:
- mhi_pm_m0_transition(mhi_cntrl);
- break;
- case MHI_STATE_M1:
- mhi_pm_m1_transition(mhi_cntrl);
- break;
- case MHI_STATE_M3:
- mhi_pm_m3_transition(mhi_cntrl);
- break;
- case MHI_STATE_SYS_ERR:
- {
- enum mhi_pm_state new_state;
-
- /* skip SYS_ERROR handling if RDDM supported */
- if (mhi_cntrl->ee == MHI_EE_RDDM ||
- mhi_cntrl->rddm_image)
- break;
-
- dev_dbg(dev, "System error detected\n");
- write_lock_irq(&mhi_cntrl->pm_lock);
- new_state = mhi_tryset_pm_state(mhi_cntrl,
- MHI_PM_SYS_ERR_DETECT);
- write_unlock_irq(&mhi_cntrl->pm_lock);
- if (new_state == MHI_PM_SYS_ERR_DETECT)
- mhi_pm_sys_err_handler(mhi_cntrl);
- break;
- }
- default:
- dev_err(dev, "Invalid state: %s\n",
- TO_MHI_STATE_STR(new_state));
- }
-
- break;
- }
- case MHI_PKT_TYPE_CMD_COMPLETION_EVENT:
- mhi_process_cmd_completion(mhi_cntrl, local_rp);
- break;
- case MHI_PKT_TYPE_EE_EVENT:
- {
- enum dev_st_transition st = DEV_ST_TRANSITION_MAX;
- enum mhi_ee_type event = MHI_TRE_GET_EV_EXECENV(local_rp);
-
- dev_dbg(dev, "Received EE event: %s\n",
- TO_MHI_EXEC_STR(event));
- switch (event) {
- case MHI_EE_SBL:
- st = DEV_ST_TRANSITION_SBL;
- break;
- case MHI_EE_WFW:
- case MHI_EE_AMSS:
- st = DEV_ST_TRANSITION_MISSION_MODE;
- break;
- case MHI_EE_RDDM:
- mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_EE_RDDM);
- write_lock_irq(&mhi_cntrl->pm_lock);
- mhi_cntrl->ee = event;
- write_unlock_irq(&mhi_cntrl->pm_lock);
- wake_up_all(&mhi_cntrl->state_event);
- break;
- default:
- dev_err(dev,
- "Unhandled EE event: 0x%x\n", type);
- }
- if (st != DEV_ST_TRANSITION_MAX)
- mhi_queue_state_transition(mhi_cntrl, st);
-
- break;
- }
- case MHI_PKT_TYPE_TX_EVENT:
- chan = MHI_TRE_GET_EV_CHID(local_rp);
-
- WARN_ON(chan >= mhi_cntrl->max_chan);
-
- /*
- * Only process the event ring elements whose channel
- * ID is within the maximum supported range.
- */
- if (chan < mhi_cntrl->max_chan) {
- mhi_chan = &mhi_cntrl->mhi_chan[chan];
- if (!mhi_chan->configured)
- break;
- parse_xfer_event(mhi_cntrl, local_rp, mhi_chan);
- event_quota--;
- }
- break;
- default:
- dev_err(dev, "Unhandled event type: %d\n", type);
- break;
- }
-
- mhi_recycle_ev_ring_element(mhi_cntrl, ev_ring);
- local_rp = ev_ring->rp;
-
- ptr = er_ctxt->rp;
- if (!is_valid_ring_ptr(ev_ring, ptr)) {
- dev_err(&mhi_cntrl->mhi_dev->dev,
- "Event ring rp points outside of the event ring\n");
- return -EIO;
- }
-
- dev_rp = mhi_to_virtual(ev_ring, ptr);
- count++;
- }
-
- read_lock_bh(&mhi_cntrl->pm_lock);
- if (likely(MHI_DB_ACCESS_VALID(mhi_cntrl)))
- mhi_ring_er_db(mhi_event);
- read_unlock_bh(&mhi_cntrl->pm_lock);
-
- return count;
-}
-
-int mhi_process_data_event_ring(struct mhi_controller *mhi_cntrl,
- struct mhi_event *mhi_event,
- u32 event_quota)
-{
- struct mhi_tre *dev_rp, *local_rp;
- struct mhi_ring *ev_ring = &mhi_event->ring;
- struct mhi_event_ctxt *er_ctxt =
- &mhi_cntrl->mhi_ctxt->er_ctxt[mhi_event->er_index];
- int count = 0;
- u32 chan;
- struct mhi_chan *mhi_chan;
- dma_addr_t ptr = er_ctxt->rp;
-
- if (unlikely(MHI_EVENT_ACCESS_INVALID(mhi_cntrl->pm_state)))
- return -EIO;
-
- if (!is_valid_ring_ptr(ev_ring, ptr)) {
- dev_err(&mhi_cntrl->mhi_dev->dev,
- "Event ring rp points outside of the event ring\n");
- return -EIO;
- }
-
- dev_rp = mhi_to_virtual(ev_ring, ptr);
- local_rp = ev_ring->rp;
-
- while (dev_rp != local_rp && event_quota > 0) {
- enum mhi_pkt_type type = MHI_TRE_GET_EV_TYPE(local_rp);
-
- chan = MHI_TRE_GET_EV_CHID(local_rp);
-
- WARN_ON(chan >= mhi_cntrl->max_chan);
-
- /*
- * Only process the event ring elements whose channel
- * ID is within the maximum supported range.
- */
- if (chan < mhi_cntrl->max_chan &&
- mhi_cntrl->mhi_chan[chan].configured) {
- mhi_chan = &mhi_cntrl->mhi_chan[chan];
-
- if (likely(type == MHI_PKT_TYPE_TX_EVENT)) {
- parse_xfer_event(mhi_cntrl, local_rp, mhi_chan);
- event_quota--;
- } else if (type == MHI_PKT_TYPE_RSC_TX_EVENT) {
- parse_rsc_event(mhi_cntrl, local_rp, mhi_chan);
- event_quota--;
- }
- }
-
- mhi_recycle_ev_ring_element(mhi_cntrl, ev_ring);
- local_rp = ev_ring->rp;
-
- ptr = er_ctxt->rp;
- if (!is_valid_ring_ptr(ev_ring, ptr)) {
- dev_err(&mhi_cntrl->mhi_dev->dev,
- "Event ring rp points outside of the event ring\n");
- return -EIO;
- }
-
- dev_rp = mhi_to_virtual(ev_ring, ptr);
- count++;
- }
- read_lock_bh(&mhi_cntrl->pm_lock);
- if (likely(MHI_DB_ACCESS_VALID(mhi_cntrl)))
- mhi_ring_er_db(mhi_event);
- read_unlock_bh(&mhi_cntrl->pm_lock);
-
- return count;
-}
-
-void mhi_ev_task(unsigned long data)
-{
- struct mhi_event *mhi_event = (struct mhi_event *)data;
- struct mhi_controller *mhi_cntrl = mhi_event->mhi_cntrl;
-
- /* process all pending events */
- spin_lock_bh(&mhi_event->lock);
- mhi_event->process_event(mhi_cntrl, mhi_event, U32_MAX);
- spin_unlock_bh(&mhi_event->lock);
-}
-
-void mhi_ctrl_ev_task(unsigned long data)
-{
- struct mhi_event *mhi_event = (struct mhi_event *)data;
- struct mhi_controller *mhi_cntrl = mhi_event->mhi_cntrl;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- enum mhi_state state;
- enum mhi_pm_state pm_state = 0;
- int ret;
-
- /*
- * We can check PM state w/o a lock here because there is no way
- * PM state can change from reg access valid to no access while this
- * thread being executed.
- */
- if (!MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state)) {
- /*
- * We may have a pending event but not allowed to
- * process it since we are probably in a suspended state,
- * so trigger a resume.
- */
- mhi_trigger_resume(mhi_cntrl);
-
- return;
- }
-
- /* Process ctrl events events */
- ret = mhi_event->process_event(mhi_cntrl, mhi_event, U32_MAX);
-
- /*
- * We received an IRQ but no events to process, maybe device went to
- * SYS_ERR state? Check the state to confirm.
- */
- if (!ret) {
- write_lock_irq(&mhi_cntrl->pm_lock);
- state = mhi_get_mhi_state(mhi_cntrl);
- if (state == MHI_STATE_SYS_ERR) {
- dev_dbg(dev, "System error detected\n");
- pm_state = mhi_tryset_pm_state(mhi_cntrl,
- MHI_PM_SYS_ERR_DETECT);
- }
- write_unlock_irq(&mhi_cntrl->pm_lock);
- if (pm_state == MHI_PM_SYS_ERR_DETECT)
- mhi_pm_sys_err_handler(mhi_cntrl);
- }
-}
-
-static bool mhi_is_ring_full(struct mhi_controller *mhi_cntrl,
- struct mhi_ring *ring)
-{
- void *tmp = ring->wp + ring->el_size;
-
- if (tmp >= (ring->base + ring->len))
- tmp = ring->base;
-
- return (tmp == ring->rp);
-}
-
-int mhi_queue_skb(struct mhi_device *mhi_dev, enum dma_data_direction dir,
- struct sk_buff *skb, size_t len, enum mhi_flags mflags)
-{
- struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
- struct mhi_chan *mhi_chan = (dir == DMA_TO_DEVICE) ? mhi_dev->ul_chan :
- mhi_dev->dl_chan;
- struct mhi_ring *tre_ring = &mhi_chan->tre_ring;
- struct mhi_buf_info buf_info = { };
- int ret;
-
- /* If MHI host pre-allocates buffers then client drivers cannot queue */
- if (mhi_chan->pre_alloc)
- return -EINVAL;
-
- if (mhi_is_ring_full(mhi_cntrl, tre_ring))
- return -ENOMEM;
-
- read_lock_bh(&mhi_cntrl->pm_lock);
- if (unlikely(MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state))) {
- read_unlock_bh(&mhi_cntrl->pm_lock);
- return -EIO;
- }
-
- /* we're in M3 or transitioning to M3 */
- if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state))
- mhi_trigger_resume(mhi_cntrl);
-
- /* Toggle wake to exit out of M2 */
- mhi_cntrl->wake_toggle(mhi_cntrl);
-
- buf_info.v_addr = skb->data;
- buf_info.cb_buf = skb;
- buf_info.len = len;
-
- ret = mhi_gen_tre(mhi_cntrl, mhi_chan, &buf_info, mflags);
- if (unlikely(ret)) {
- read_unlock_bh(&mhi_cntrl->pm_lock);
- return ret;
- }
-
- if (mhi_chan->dir == DMA_TO_DEVICE)
- atomic_inc(&mhi_cntrl->pending_pkts);
-
- if (likely(MHI_DB_ACCESS_VALID(mhi_cntrl))) {
- read_lock_bh(&mhi_chan->lock);
- mhi_ring_chan_db(mhi_cntrl, mhi_chan);
- read_unlock_bh(&mhi_chan->lock);
- }
-
- read_unlock_bh(&mhi_cntrl->pm_lock);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(mhi_queue_skb);
-
-int mhi_queue_dma(struct mhi_device *mhi_dev, enum dma_data_direction dir,
- struct mhi_buf *mhi_buf, size_t len, enum mhi_flags mflags)
-{
- struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
- struct mhi_chan *mhi_chan = (dir == DMA_TO_DEVICE) ? mhi_dev->ul_chan :
- mhi_dev->dl_chan;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- struct mhi_ring *tre_ring = &mhi_chan->tre_ring;
- struct mhi_buf_info buf_info = { };
- int ret;
-
- /* If MHI host pre-allocates buffers then client drivers cannot queue */
- if (mhi_chan->pre_alloc)
- return -EINVAL;
-
- if (mhi_is_ring_full(mhi_cntrl, tre_ring))
- return -ENOMEM;
-
- read_lock_bh(&mhi_cntrl->pm_lock);
- if (unlikely(MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state))) {
- dev_err(dev, "MHI is not in activate state, PM state: %s\n",
- to_mhi_pm_state_str(mhi_cntrl->pm_state));
- read_unlock_bh(&mhi_cntrl->pm_lock);
-
- return -EIO;
- }
-
- /* we're in M3 or transitioning to M3 */
- if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state))
- mhi_trigger_resume(mhi_cntrl);
-
- /* Toggle wake to exit out of M2 */
- mhi_cntrl->wake_toggle(mhi_cntrl);
-
- buf_info.p_addr = mhi_buf->dma_addr;
- buf_info.cb_buf = mhi_buf;
- buf_info.pre_mapped = true;
- buf_info.len = len;
-
- ret = mhi_gen_tre(mhi_cntrl, mhi_chan, &buf_info, mflags);
- if (unlikely(ret)) {
- read_unlock_bh(&mhi_cntrl->pm_lock);
- return ret;
- }
-
- if (mhi_chan->dir == DMA_TO_DEVICE)
- atomic_inc(&mhi_cntrl->pending_pkts);
-
- if (likely(MHI_DB_ACCESS_VALID(mhi_cntrl))) {
- read_lock_bh(&mhi_chan->lock);
- mhi_ring_chan_db(mhi_cntrl, mhi_chan);
- read_unlock_bh(&mhi_chan->lock);
- }
-
- read_unlock_bh(&mhi_cntrl->pm_lock);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(mhi_queue_dma);
-
-int mhi_gen_tre(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan,
- struct mhi_buf_info *info, enum mhi_flags flags)
-{
- struct mhi_ring *buf_ring, *tre_ring;
- struct mhi_tre *mhi_tre;
- struct mhi_buf_info *buf_info;
- int eot, eob, chain, bei;
- int ret;
-
- buf_ring = &mhi_chan->buf_ring;
- tre_ring = &mhi_chan->tre_ring;
-
- buf_info = buf_ring->wp;
- WARN_ON(buf_info->used);
- buf_info->pre_mapped = info->pre_mapped;
- if (info->pre_mapped)
- buf_info->p_addr = info->p_addr;
- else
- buf_info->v_addr = info->v_addr;
- buf_info->cb_buf = info->cb_buf;
- buf_info->wp = tre_ring->wp;
- buf_info->dir = mhi_chan->dir;
- buf_info->len = info->len;
-
- if (!info->pre_mapped) {
- ret = mhi_cntrl->map_single(mhi_cntrl, buf_info);
- if (ret)
- return ret;
- }
-
- eob = !!(flags & MHI_EOB);
- eot = !!(flags & MHI_EOT);
- chain = !!(flags & MHI_CHAIN);
- bei = !!(mhi_chan->intmod);
-
- mhi_tre = tre_ring->wp;
- mhi_tre->ptr = MHI_TRE_DATA_PTR(buf_info->p_addr);
- mhi_tre->dword[0] = MHI_TRE_DATA_DWORD0(info->len);
- mhi_tre->dword[1] = MHI_TRE_DATA_DWORD1(bei, eot, eob, chain);
-
- /* increment WP */
- mhi_add_ring_element(mhi_cntrl, tre_ring);
- mhi_add_ring_element(mhi_cntrl, buf_ring);
-
- return 0;
-}
-
-int mhi_queue_buf(struct mhi_device *mhi_dev, enum dma_data_direction dir,
- void *buf, size_t len, enum mhi_flags mflags)
-{
- struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
- struct mhi_chan *mhi_chan = (dir == DMA_TO_DEVICE) ? mhi_dev->ul_chan :
- mhi_dev->dl_chan;
- struct mhi_ring *tre_ring;
- struct mhi_buf_info buf_info = { };
- unsigned long flags;
- int ret;
-
- /*
- * this check here only as a guard, it's always
- * possible mhi can enter error while executing rest of function,
- * which is not fatal so we do not need to hold pm_lock
- */
- if (unlikely(MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)))
- return -EIO;
-
- tre_ring = &mhi_chan->tre_ring;
- if (mhi_is_ring_full(mhi_cntrl, tre_ring))
- return -ENOMEM;
-
- buf_info.v_addr = buf;
- buf_info.cb_buf = buf;
- buf_info.len = len;
-
- ret = mhi_gen_tre(mhi_cntrl, mhi_chan, &buf_info, mflags);
- if (unlikely(ret))
- return ret;
-
- read_lock_irqsave(&mhi_cntrl->pm_lock, flags);
-
- /* we're in M3 or transitioning to M3 */
- if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state))
- mhi_trigger_resume(mhi_cntrl);
-
- /* Toggle wake to exit out of M2 */
- mhi_cntrl->wake_toggle(mhi_cntrl);
-
- if (mhi_chan->dir == DMA_TO_DEVICE)
- atomic_inc(&mhi_cntrl->pending_pkts);
-
- if (likely(MHI_DB_ACCESS_VALID(mhi_cntrl))) {
- unsigned long flags;
-
- read_lock_irqsave(&mhi_chan->lock, flags);
- mhi_ring_chan_db(mhi_cntrl, mhi_chan);
- read_unlock_irqrestore(&mhi_chan->lock, flags);
- }
-
- read_unlock_irqrestore(&mhi_cntrl->pm_lock, flags);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(mhi_queue_buf);
-
-int mhi_send_cmd(struct mhi_controller *mhi_cntrl,
- struct mhi_chan *mhi_chan,
- enum mhi_cmd_type cmd)
-{
- struct mhi_tre *cmd_tre = NULL;
- struct mhi_cmd *mhi_cmd = &mhi_cntrl->mhi_cmd[PRIMARY_CMD_RING];
- struct mhi_ring *ring = &mhi_cmd->ring;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- int chan = 0;
-
- if (mhi_chan)
- chan = mhi_chan->chan;
-
- spin_lock_bh(&mhi_cmd->lock);
- if (!get_nr_avail_ring_elements(mhi_cntrl, ring)) {
- spin_unlock_bh(&mhi_cmd->lock);
- return -ENOMEM;
- }
-
- /* prepare the cmd tre */
- cmd_tre = ring->wp;
- switch (cmd) {
- case MHI_CMD_RESET_CHAN:
- cmd_tre->ptr = MHI_TRE_CMD_RESET_PTR;
- cmd_tre->dword[0] = MHI_TRE_CMD_RESET_DWORD0;
- cmd_tre->dword[1] = MHI_TRE_CMD_RESET_DWORD1(chan);
- break;
- case MHI_CMD_START_CHAN:
- cmd_tre->ptr = MHI_TRE_CMD_START_PTR;
- cmd_tre->dword[0] = MHI_TRE_CMD_START_DWORD0;
- cmd_tre->dword[1] = MHI_TRE_CMD_START_DWORD1(chan);
- break;
- default:
- dev_err(dev, "Command not supported\n");
- break;
- }
-
- /* queue to hardware */
- mhi_add_ring_element(mhi_cntrl, ring);
- read_lock_bh(&mhi_cntrl->pm_lock);
- if (likely(MHI_DB_ACCESS_VALID(mhi_cntrl)))
- mhi_ring_cmd_db(mhi_cntrl, mhi_cmd);
- read_unlock_bh(&mhi_cntrl->pm_lock);
- spin_unlock_bh(&mhi_cmd->lock);
-
- return 0;
-}
-
-static void __mhi_unprepare_channel(struct mhi_controller *mhi_cntrl,
- struct mhi_chan *mhi_chan)
-{
- int ret;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
-
- dev_dbg(dev, "Entered: unprepare channel:%d\n", mhi_chan->chan);
-
- /* no more processing events for this channel */
- mutex_lock(&mhi_chan->mutex);
- write_lock_irq(&mhi_chan->lock);
- if (mhi_chan->ch_state != MHI_CH_STATE_ENABLED) {
- write_unlock_irq(&mhi_chan->lock);
- mutex_unlock(&mhi_chan->mutex);
- return;
- }
-
- mhi_chan->ch_state = MHI_CH_STATE_DISABLED;
- write_unlock_irq(&mhi_chan->lock);
-
- reinit_completion(&mhi_chan->completion);
- read_lock_bh(&mhi_cntrl->pm_lock);
- if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
- read_unlock_bh(&mhi_cntrl->pm_lock);
- goto error_invalid_state;
- }
-
- mhi_cntrl->wake_toggle(mhi_cntrl);
- read_unlock_bh(&mhi_cntrl->pm_lock);
-
- mhi_cntrl->runtime_get(mhi_cntrl);
- mhi_cntrl->runtime_put(mhi_cntrl);
- ret = mhi_send_cmd(mhi_cntrl, mhi_chan, MHI_CMD_RESET_CHAN);
- if (ret)
- goto error_invalid_state;
-
- /* even if it fails we will still reset */
- ret = wait_for_completion_timeout(&mhi_chan->completion,
- msecs_to_jiffies(mhi_cntrl->timeout_ms));
- if (!ret || mhi_chan->ccs != MHI_EV_CC_SUCCESS)
- dev_err(dev,
- "Failed to receive cmd completion, still resetting\n");
-
-error_invalid_state:
- if (!mhi_chan->offload_ch) {
- mhi_reset_chan(mhi_cntrl, mhi_chan);
- mhi_deinit_chan_ctxt(mhi_cntrl, mhi_chan);
- }
- dev_dbg(dev, "chan:%d successfully resetted\n", mhi_chan->chan);
- mutex_unlock(&mhi_chan->mutex);
-}
-
-int mhi_prepare_channel(struct mhi_controller *mhi_cntrl,
- struct mhi_chan *mhi_chan)
-{
- int ret = 0;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
-
- dev_dbg(dev, "Preparing channel: %d\n", mhi_chan->chan);
-
- if (!(BIT(mhi_cntrl->ee) & mhi_chan->ee_mask)) {
- dev_err(dev,
- "Current EE: %s Required EE Mask: 0x%x for chan: %s\n",
- TO_MHI_EXEC_STR(mhi_cntrl->ee), mhi_chan->ee_mask,
- mhi_chan->name);
- return -ENOTCONN;
- }
-
- mutex_lock(&mhi_chan->mutex);
-
- /* If channel is not in disable state, do not allow it to start */
- if (mhi_chan->ch_state != MHI_CH_STATE_DISABLED) {
- ret = -EIO;
- dev_dbg(dev, "channel: %d is not in disabled state\n",
- mhi_chan->chan);
- goto error_init_chan;
- }
-
- /* Check of client manages channel context for offload channels */
- if (!mhi_chan->offload_ch) {
- ret = mhi_init_chan_ctxt(mhi_cntrl, mhi_chan);
- if (ret)
- goto error_init_chan;
- }
-
- reinit_completion(&mhi_chan->completion);
- read_lock_bh(&mhi_cntrl->pm_lock);
- if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
- read_unlock_bh(&mhi_cntrl->pm_lock);
- ret = -EIO;
- goto error_pm_state;
- }
-
- mhi_cntrl->wake_toggle(mhi_cntrl);
- read_unlock_bh(&mhi_cntrl->pm_lock);
- mhi_cntrl->runtime_get(mhi_cntrl);
- mhi_cntrl->runtime_put(mhi_cntrl);
-
- ret = mhi_send_cmd(mhi_cntrl, mhi_chan, MHI_CMD_START_CHAN);
- if (ret)
- goto error_pm_state;
-
- ret = wait_for_completion_timeout(&mhi_chan->completion,
- msecs_to_jiffies(mhi_cntrl->timeout_ms));
- if (!ret || mhi_chan->ccs != MHI_EV_CC_SUCCESS) {
- ret = -EIO;
- goto error_pm_state;
- }
-
- write_lock_irq(&mhi_chan->lock);
- mhi_chan->ch_state = MHI_CH_STATE_ENABLED;
- write_unlock_irq(&mhi_chan->lock);
-
- /* Pre-allocate buffer for xfer ring */
- if (mhi_chan->pre_alloc) {
- int nr_el = get_nr_avail_ring_elements(mhi_cntrl,
- &mhi_chan->tre_ring);
- size_t len = mhi_cntrl->buffer_len;
-
- while (nr_el--) {
- void *buf;
- struct mhi_buf_info info = { };
- buf = kmalloc(len, GFP_KERNEL);
- if (!buf) {
- ret = -ENOMEM;
- goto error_pre_alloc;
- }
-
- /* Prepare transfer descriptors */
- info.v_addr = buf;
- info.cb_buf = buf;
- info.len = len;
- ret = mhi_gen_tre(mhi_cntrl, mhi_chan, &info, MHI_EOT);
- if (ret) {
- kfree(buf);
- goto error_pre_alloc;
- }
- }
-
- read_lock_bh(&mhi_cntrl->pm_lock);
- if (MHI_DB_ACCESS_VALID(mhi_cntrl)) {
- read_lock_irq(&mhi_chan->lock);
- mhi_ring_chan_db(mhi_cntrl, mhi_chan);
- read_unlock_irq(&mhi_chan->lock);
- }
- read_unlock_bh(&mhi_cntrl->pm_lock);
- }
-
- mutex_unlock(&mhi_chan->mutex);
-
- dev_dbg(dev, "Chan: %d successfully moved to start state\n",
- mhi_chan->chan);
-
- return 0;
-
-error_pm_state:
- if (!mhi_chan->offload_ch)
- mhi_deinit_chan_ctxt(mhi_cntrl, mhi_chan);
-
-error_init_chan:
- mutex_unlock(&mhi_chan->mutex);
-
- return ret;
-
-error_pre_alloc:
- mutex_unlock(&mhi_chan->mutex);
- __mhi_unprepare_channel(mhi_cntrl, mhi_chan);
-
- return ret;
-}
-
-static void mhi_mark_stale_events(struct mhi_controller *mhi_cntrl,
- struct mhi_event *mhi_event,
- struct mhi_event_ctxt *er_ctxt,
- int chan)
-
-{
- struct mhi_tre *dev_rp, *local_rp;
- struct mhi_ring *ev_ring;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- unsigned long flags;
- dma_addr_t ptr;
-
- dev_dbg(dev, "Marking all events for chan: %d as stale\n", chan);
-
- ev_ring = &mhi_event->ring;
-
- /* mark all stale events related to channel as STALE event */
- spin_lock_irqsave(&mhi_event->lock, flags);
-
- ptr = er_ctxt->rp;
- if (!is_valid_ring_ptr(ev_ring, ptr)) {
- dev_err(&mhi_cntrl->mhi_dev->dev,
- "Event ring rp points outside of the event ring\n");
- dev_rp = ev_ring->rp;
- } else {
- dev_rp = mhi_to_virtual(ev_ring, ptr);
- }
-
- local_rp = ev_ring->rp;
- while (dev_rp != local_rp) {
- if (MHI_TRE_GET_EV_TYPE(local_rp) == MHI_PKT_TYPE_TX_EVENT &&
- chan == MHI_TRE_GET_EV_CHID(local_rp))
- local_rp->dword[1] = MHI_TRE_EV_DWORD1(chan,
- MHI_PKT_TYPE_STALE_EVENT);
- local_rp++;
- if (local_rp == (ev_ring->base + ev_ring->len))
- local_rp = ev_ring->base;
- }
-
- dev_dbg(dev, "Finished marking events as stale events\n");
- spin_unlock_irqrestore(&mhi_event->lock, flags);
-}
-
-static void mhi_reset_data_chan(struct mhi_controller *mhi_cntrl,
- struct mhi_chan *mhi_chan)
-{
- struct mhi_ring *buf_ring, *tre_ring;
- struct mhi_result result;
-
- /* Reset any pending buffers */
- buf_ring = &mhi_chan->buf_ring;
- tre_ring = &mhi_chan->tre_ring;
- result.transaction_status = -ENOTCONN;
- result.bytes_xferd = 0;
- while (tre_ring->rp != tre_ring->wp) {
- struct mhi_buf_info *buf_info = buf_ring->rp;
-
- if (mhi_chan->dir == DMA_TO_DEVICE)
- atomic_dec(&mhi_cntrl->pending_pkts);
-
- if (!buf_info->pre_mapped)
- mhi_cntrl->unmap_single(mhi_cntrl, buf_info);
-
- mhi_del_ring_element(mhi_cntrl, buf_ring);
- mhi_del_ring_element(mhi_cntrl, tre_ring);
-
- if (mhi_chan->pre_alloc) {
- kfree(buf_info->cb_buf);
- } else {
- result.buf_addr = buf_info->cb_buf;
- mhi_chan->xfer_cb(mhi_chan->mhi_dev, &result);
- }
- }
-}
-
-void mhi_reset_chan(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan)
-{
- struct mhi_event *mhi_event;
- struct mhi_event_ctxt *er_ctxt;
- int chan = mhi_chan->chan;
-
- /* Nothing to reset, client doesn't queue buffers */
- if (mhi_chan->offload_ch)
- return;
-
- read_lock_bh(&mhi_cntrl->pm_lock);
- mhi_event = &mhi_cntrl->mhi_event[mhi_chan->er_index];
- er_ctxt = &mhi_cntrl->mhi_ctxt->er_ctxt[mhi_chan->er_index];
-
- mhi_mark_stale_events(mhi_cntrl, mhi_event, er_ctxt, chan);
-
- mhi_reset_data_chan(mhi_cntrl, mhi_chan);
-
- read_unlock_bh(&mhi_cntrl->pm_lock);
-}
-
-/* Move channel to start state */
-int mhi_prepare_for_transfer(struct mhi_device *mhi_dev)
-{
- int ret, dir;
- struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
- struct mhi_chan *mhi_chan;
-
- for (dir = 0; dir < 2; dir++) {
- mhi_chan = dir ? mhi_dev->dl_chan : mhi_dev->ul_chan;
- if (!mhi_chan)
- continue;
-
- ret = mhi_prepare_channel(mhi_cntrl, mhi_chan);
- if (ret)
- goto error_open_chan;
- }
-
- return 0;
-
-error_open_chan:
- for (--dir; dir >= 0; dir--) {
- mhi_chan = dir ? mhi_dev->dl_chan : mhi_dev->ul_chan;
- if (!mhi_chan)
- continue;
-
- __mhi_unprepare_channel(mhi_cntrl, mhi_chan);
- }
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(mhi_prepare_for_transfer);
-
-void mhi_unprepare_from_transfer(struct mhi_device *mhi_dev)
-{
- struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
- struct mhi_chan *mhi_chan;
- int dir;
-
- for (dir = 0; dir < 2; dir++) {
- mhi_chan = dir ? mhi_dev->ul_chan : mhi_dev->dl_chan;
- if (!mhi_chan)
- continue;
-
- __mhi_unprepare_channel(mhi_cntrl, mhi_chan);
- }
-}
-EXPORT_SYMBOL_GPL(mhi_unprepare_from_transfer);
-
-int mhi_poll(struct mhi_device *mhi_dev, u32 budget)
-{
- struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
- struct mhi_chan *mhi_chan = mhi_dev->dl_chan;
- struct mhi_event *mhi_event = &mhi_cntrl->mhi_event[mhi_chan->er_index];
- int ret;
-
- spin_lock_bh(&mhi_event->lock);
- ret = mhi_event->process_event(mhi_cntrl, mhi_event, budget);
- spin_unlock_bh(&mhi_event->lock);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(mhi_poll);
diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c
deleted file mode 100644
index 7d69b740b9f9..000000000000
--- a/drivers/bus/mhi/core/pm.c
+++ /dev/null
@@ -1,1157 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
- *
- */
-
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/dma-direction.h>
-#include <linux/dma-mapping.h>
-#include <linux/interrupt.h>
-#include <linux/list.h>
-#include <linux/mhi.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/wait.h>
-#include "internal.h"
-
-/*
- * Not all MHI state transitions are synchronous. Transitions like Linkdown,
- * SYS_ERR, and shutdown can happen anytime asynchronously. This function will
- * transition to a new state only if we're allowed to.
- *
- * Priority increases as we go down. For instance, from any state in L0, the
- * transition can be made to states in L1, L2 and L3. A notable exception to
- * this rule is state DISABLE. From DISABLE state we can only transition to
- * POR state. Also, while in L2 state, user cannot jump back to previous
- * L1 or L0 states.
- *
- * Valid transitions:
- * L0: DISABLE <--> POR
- * POR <--> POR
- * POR -> M0 -> M2 --> M0
- * POR -> FW_DL_ERR
- * FW_DL_ERR <--> FW_DL_ERR
- * M0 <--> M0
- * M0 -> FW_DL_ERR
- * M0 -> M3_ENTER -> M3 -> M3_EXIT --> M0
- * L1: SYS_ERR_DETECT -> SYS_ERR_PROCESS --> POR
- * L2: SHUTDOWN_PROCESS -> DISABLE
- * L3: LD_ERR_FATAL_DETECT <--> LD_ERR_FATAL_DETECT
- * LD_ERR_FATAL_DETECT -> SHUTDOWN_PROCESS
- */
-static struct mhi_pm_transitions const dev_state_transitions[] = {
- /* L0 States */
- {
- MHI_PM_DISABLE,
- MHI_PM_POR
- },
- {
- MHI_PM_POR,
- MHI_PM_POR | MHI_PM_DISABLE | MHI_PM_M0 |
- MHI_PM_SYS_ERR_DETECT | MHI_PM_SHUTDOWN_PROCESS |
- MHI_PM_LD_ERR_FATAL_DETECT | MHI_PM_FW_DL_ERR
- },
- {
- MHI_PM_M0,
- MHI_PM_M0 | MHI_PM_M2 | MHI_PM_M3_ENTER |
- MHI_PM_SYS_ERR_DETECT | MHI_PM_SHUTDOWN_PROCESS |
- MHI_PM_LD_ERR_FATAL_DETECT | MHI_PM_FW_DL_ERR
- },
- {
- MHI_PM_M2,
- MHI_PM_M0 | MHI_PM_SYS_ERR_DETECT | MHI_PM_SHUTDOWN_PROCESS |
- MHI_PM_LD_ERR_FATAL_DETECT
- },
- {
- MHI_PM_M3_ENTER,
- MHI_PM_M3 | MHI_PM_SYS_ERR_DETECT | MHI_PM_SHUTDOWN_PROCESS |
- MHI_PM_LD_ERR_FATAL_DETECT
- },
- {
- MHI_PM_M3,
- MHI_PM_M3_EXIT | MHI_PM_SYS_ERR_DETECT |
- MHI_PM_SHUTDOWN_PROCESS | MHI_PM_LD_ERR_FATAL_DETECT
- },
- {
- MHI_PM_M3_EXIT,
- MHI_PM_M0 | MHI_PM_SYS_ERR_DETECT | MHI_PM_SHUTDOWN_PROCESS |
- MHI_PM_LD_ERR_FATAL_DETECT
- },
- {
- MHI_PM_FW_DL_ERR,
- MHI_PM_FW_DL_ERR | MHI_PM_SYS_ERR_DETECT |
- MHI_PM_SHUTDOWN_PROCESS | MHI_PM_LD_ERR_FATAL_DETECT
- },
- /* L1 States */
- {
- MHI_PM_SYS_ERR_DETECT,
- MHI_PM_SYS_ERR_PROCESS | MHI_PM_SHUTDOWN_PROCESS |
- MHI_PM_LD_ERR_FATAL_DETECT
- },
- {
- MHI_PM_SYS_ERR_PROCESS,
- MHI_PM_POR | MHI_PM_SHUTDOWN_PROCESS |
- MHI_PM_LD_ERR_FATAL_DETECT
- },
- /* L2 States */
- {
- MHI_PM_SHUTDOWN_PROCESS,
- MHI_PM_DISABLE | MHI_PM_LD_ERR_FATAL_DETECT
- },
- /* L3 States */
- {
- MHI_PM_LD_ERR_FATAL_DETECT,
- MHI_PM_LD_ERR_FATAL_DETECT | MHI_PM_SHUTDOWN_PROCESS
- },
-};
-
-enum mhi_pm_state __must_check mhi_tryset_pm_state(struct mhi_controller *mhi_cntrl,
- enum mhi_pm_state state)
-{
- unsigned long cur_state = mhi_cntrl->pm_state;
- int index = find_last_bit(&cur_state, 32);
-
- if (unlikely(index >= ARRAY_SIZE(dev_state_transitions)))
- return cur_state;
-
- if (unlikely(dev_state_transitions[index].from_state != cur_state))
- return cur_state;
-
- if (unlikely(!(dev_state_transitions[index].to_states & state)))
- return cur_state;
-
- mhi_cntrl->pm_state = state;
- return mhi_cntrl->pm_state;
-}
-
-void mhi_set_mhi_state(struct mhi_controller *mhi_cntrl, enum mhi_state state)
-{
- if (state == MHI_STATE_RESET) {
- mhi_write_reg_field(mhi_cntrl, mhi_cntrl->regs, MHICTRL,
- MHICTRL_RESET_MASK, MHICTRL_RESET_SHIFT, 1);
- } else {
- mhi_write_reg_field(mhi_cntrl, mhi_cntrl->regs, MHICTRL,
- MHICTRL_MHISTATE_MASK,
- MHICTRL_MHISTATE_SHIFT, state);
- }
-}
-
-/* NOP for backward compatibility, host allowed to ring DB in M2 state */
-static void mhi_toggle_dev_wake_nop(struct mhi_controller *mhi_cntrl)
-{
-}
-
-static void mhi_toggle_dev_wake(struct mhi_controller *mhi_cntrl)
-{
- mhi_cntrl->wake_get(mhi_cntrl, false);
- mhi_cntrl->wake_put(mhi_cntrl, true);
-}
-
-/* Handle device ready state transition */
-int mhi_ready_state_transition(struct mhi_controller *mhi_cntrl)
-{
- void __iomem *base = mhi_cntrl->regs;
- struct mhi_event *mhi_event;
- enum mhi_pm_state cur_state;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- u32 reset = 1, ready = 0;
- int ret, i;
-
- /* Wait for RESET to be cleared and READY bit to be set by the device */
- wait_event_timeout(mhi_cntrl->state_event,
- MHI_PM_IN_FATAL_STATE(mhi_cntrl->pm_state) ||
- mhi_read_reg_field(mhi_cntrl, base, MHICTRL,
- MHICTRL_RESET_MASK,
- MHICTRL_RESET_SHIFT, &reset) ||
- mhi_read_reg_field(mhi_cntrl, base, MHISTATUS,
- MHISTATUS_READY_MASK,
- MHISTATUS_READY_SHIFT, &ready) ||
- (!reset && ready),
- msecs_to_jiffies(mhi_cntrl->timeout_ms));
-
- /* Check if device entered error state */
- if (MHI_PM_IN_FATAL_STATE(mhi_cntrl->pm_state)) {
- dev_err(dev, "Device link is not accessible\n");
- return -EIO;
- }
-
- /* Timeout if device did not transition to ready state */
- if (reset || !ready) {
- dev_err(dev, "Device Ready timeout\n");
- return -ETIMEDOUT;
- }
-
- dev_dbg(dev, "Device in READY State\n");
- write_lock_irq(&mhi_cntrl->pm_lock);
- cur_state = mhi_tryset_pm_state(mhi_cntrl, MHI_PM_POR);
- mhi_cntrl->dev_state = MHI_STATE_READY;
- write_unlock_irq(&mhi_cntrl->pm_lock);
-
- if (cur_state != MHI_PM_POR) {
- dev_err(dev, "Error moving to state %s from %s\n",
- to_mhi_pm_state_str(MHI_PM_POR),
- to_mhi_pm_state_str(cur_state));
- return -EIO;
- }
-
- read_lock_bh(&mhi_cntrl->pm_lock);
- if (!MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state)) {
- dev_err(dev, "Device registers not accessible\n");
- goto error_mmio;
- }
-
- /* Configure MMIO registers */
- ret = mhi_init_mmio(mhi_cntrl);
- if (ret) {
- dev_err(dev, "Error configuring MMIO registers\n");
- goto error_mmio;
- }
-
- /* Add elements to all SW event rings */
- mhi_event = mhi_cntrl->mhi_event;
- for (i = 0; i < mhi_cntrl->total_ev_rings; i++, mhi_event++) {
- struct mhi_ring *ring = &mhi_event->ring;
-
- /* Skip if this is an offload or HW event */
- if (mhi_event->offload_ev || mhi_event->hw_ring)
- continue;
-
- ring->wp = ring->base + ring->len - ring->el_size;
- *ring->ctxt_wp = ring->iommu_base + ring->len - ring->el_size;
- /* Update all cores */
- smp_wmb();
-
- /* Ring the event ring db */
- spin_lock_irq(&mhi_event->lock);
- mhi_ring_er_db(mhi_event);
- spin_unlock_irq(&mhi_event->lock);
- }
-
- /* Set MHI to M0 state */
- mhi_set_mhi_state(mhi_cntrl, MHI_STATE_M0);
- read_unlock_bh(&mhi_cntrl->pm_lock);
-
- return 0;
-
-error_mmio:
- read_unlock_bh(&mhi_cntrl->pm_lock);
-
- return -EIO;
-}
-
-int mhi_pm_m0_transition(struct mhi_controller *mhi_cntrl)
-{
- enum mhi_pm_state cur_state;
- struct mhi_chan *mhi_chan;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- int i;
-
- write_lock_irq(&mhi_cntrl->pm_lock);
- mhi_cntrl->dev_state = MHI_STATE_M0;
- cur_state = mhi_tryset_pm_state(mhi_cntrl, MHI_PM_M0);
- write_unlock_irq(&mhi_cntrl->pm_lock);
- if (unlikely(cur_state != MHI_PM_M0)) {
- dev_err(dev, "Unable to transition to M0 state\n");
- return -EIO;
- }
- mhi_cntrl->M0++;
-
- /* Wake up the device */
- read_lock_bh(&mhi_cntrl->pm_lock);
- mhi_cntrl->wake_get(mhi_cntrl, true);
-
- /* Ring all event rings and CMD ring only if we're in mission mode */
- if (MHI_IN_MISSION_MODE(mhi_cntrl->ee)) {
- struct mhi_event *mhi_event = mhi_cntrl->mhi_event;
- struct mhi_cmd *mhi_cmd =
- &mhi_cntrl->mhi_cmd[PRIMARY_CMD_RING];
-
- for (i = 0; i < mhi_cntrl->total_ev_rings; i++, mhi_event++) {
- if (mhi_event->offload_ev)
- continue;
-
- spin_lock_irq(&mhi_event->lock);
- mhi_ring_er_db(mhi_event);
- spin_unlock_irq(&mhi_event->lock);
- }
-
- /* Only ring primary cmd ring if ring is not empty */
- spin_lock_irq(&mhi_cmd->lock);
- if (mhi_cmd->ring.rp != mhi_cmd->ring.wp)
- mhi_ring_cmd_db(mhi_cntrl, mhi_cmd);
- spin_unlock_irq(&mhi_cmd->lock);
- }
-
- /* Ring channel DB registers */
- mhi_chan = mhi_cntrl->mhi_chan;
- for (i = 0; i < mhi_cntrl->max_chan; i++, mhi_chan++) {
- struct mhi_ring *tre_ring = &mhi_chan->tre_ring;
-
- if (mhi_chan->db_cfg.reset_req) {
- write_lock_irq(&mhi_chan->lock);
- mhi_chan->db_cfg.db_mode = true;
- write_unlock_irq(&mhi_chan->lock);
- }
-
- read_lock_irq(&mhi_chan->lock);
-
- /* Only ring DB if ring is not empty */
- if (tre_ring->base && tre_ring->wp != tre_ring->rp &&
- mhi_chan->ch_state == MHI_CH_STATE_ENABLED)
- mhi_ring_chan_db(mhi_cntrl, mhi_chan);
- read_unlock_irq(&mhi_chan->lock);
- }
-
- mhi_cntrl->wake_put(mhi_cntrl, false);
- read_unlock_bh(&mhi_cntrl->pm_lock);
- wake_up_all(&mhi_cntrl->state_event);
-
- return 0;
-}
-
-/*
- * After receiving the MHI state change event from the device indicating the
- * transition to M1 state, the host can transition the device to M2 state
- * for keeping it in low power state.
- */
-void mhi_pm_m1_transition(struct mhi_controller *mhi_cntrl)
-{
- enum mhi_pm_state state;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
-
- write_lock_irq(&mhi_cntrl->pm_lock);
- state = mhi_tryset_pm_state(mhi_cntrl, MHI_PM_M2);
- if (state == MHI_PM_M2) {
- mhi_set_mhi_state(mhi_cntrl, MHI_STATE_M2);
- mhi_cntrl->dev_state = MHI_STATE_M2;
-
- write_unlock_irq(&mhi_cntrl->pm_lock);
-
- mhi_cntrl->M2++;
- wake_up_all(&mhi_cntrl->state_event);
-
- /* If there are any pending resources, exit M2 immediately */
- if (unlikely(atomic_read(&mhi_cntrl->pending_pkts) ||
- atomic_read(&mhi_cntrl->dev_wake))) {
- dev_dbg(dev,
- "Exiting M2, pending_pkts: %d dev_wake: %d\n",
- atomic_read(&mhi_cntrl->pending_pkts),
- atomic_read(&mhi_cntrl->dev_wake));
- read_lock_bh(&mhi_cntrl->pm_lock);
- mhi_cntrl->wake_get(mhi_cntrl, true);
- mhi_cntrl->wake_put(mhi_cntrl, true);
- read_unlock_bh(&mhi_cntrl->pm_lock);
- } else {
- mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_IDLE);
- }
- } else {
- write_unlock_irq(&mhi_cntrl->pm_lock);
- }
-}
-
-/* MHI M3 completion handler */
-int mhi_pm_m3_transition(struct mhi_controller *mhi_cntrl)
-{
- enum mhi_pm_state state;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
-
- write_lock_irq(&mhi_cntrl->pm_lock);
- mhi_cntrl->dev_state = MHI_STATE_M3;
- state = mhi_tryset_pm_state(mhi_cntrl, MHI_PM_M3);
- write_unlock_irq(&mhi_cntrl->pm_lock);
- if (state != MHI_PM_M3) {
- dev_err(dev, "Unable to transition to M3 state\n");
- return -EIO;
- }
-
- mhi_cntrl->M3++;
- wake_up_all(&mhi_cntrl->state_event);
-
- return 0;
-}
-
-/* Handle device Mission Mode transition */
-static int mhi_pm_mission_mode_transition(struct mhi_controller *mhi_cntrl)
-{
- struct mhi_event *mhi_event;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- enum mhi_ee_type current_ee = mhi_cntrl->ee;
- int i, ret;
-
- dev_dbg(dev, "Processing Mission Mode transition\n");
-
- write_lock_irq(&mhi_cntrl->pm_lock);
- if (MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state))
- mhi_cntrl->ee = mhi_get_exec_env(mhi_cntrl);
- write_unlock_irq(&mhi_cntrl->pm_lock);
-
- if (!MHI_IN_MISSION_MODE(mhi_cntrl->ee))
- return -EIO;
-
- wake_up_all(&mhi_cntrl->state_event);
-
- device_for_each_child(&mhi_cntrl->mhi_dev->dev, ¤t_ee,
- mhi_destroy_device);
- mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_EE_MISSION_MODE);
-
- /* Force MHI to be in M0 state before continuing */
- ret = __mhi_device_get_sync(mhi_cntrl);
- if (ret)
- return ret;
-
- read_lock_bh(&mhi_cntrl->pm_lock);
-
- if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
- ret = -EIO;
- goto error_mission_mode;
- }
-
- /* Add elements to all HW event rings */
- mhi_event = mhi_cntrl->mhi_event;
- for (i = 0; i < mhi_cntrl->total_ev_rings; i++, mhi_event++) {
- struct mhi_ring *ring = &mhi_event->ring;
-
- if (mhi_event->offload_ev || !mhi_event->hw_ring)
- continue;
-
- ring->wp = ring->base + ring->len - ring->el_size;
- *ring->ctxt_wp = ring->iommu_base + ring->len - ring->el_size;
- /* Update to all cores */
- smp_wmb();
-
- spin_lock_irq(&mhi_event->lock);
- if (MHI_DB_ACCESS_VALID(mhi_cntrl))
- mhi_ring_er_db(mhi_event);
- spin_unlock_irq(&mhi_event->lock);
- }
-
- read_unlock_bh(&mhi_cntrl->pm_lock);
-
- /*
- * The MHI devices are only created when the client device switches its
- * Execution Environment (EE) to either SBL or AMSS states
- */
- mhi_create_devices(mhi_cntrl);
-
- read_lock_bh(&mhi_cntrl->pm_lock);
-
-error_mission_mode:
- mhi_cntrl->wake_put(mhi_cntrl, false);
- read_unlock_bh(&mhi_cntrl->pm_lock);
-
- return ret;
-}
-
-/* Handle SYS_ERR and Shutdown transitions */
-static void mhi_pm_disable_transition(struct mhi_controller *mhi_cntrl,
- enum mhi_pm_state transition_state)
-{
- enum mhi_pm_state cur_state, prev_state;
- struct mhi_event *mhi_event;
- struct mhi_cmd_ctxt *cmd_ctxt;
- struct mhi_cmd *mhi_cmd;
- struct mhi_event_ctxt *er_ctxt;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- int ret, i;
-
- dev_dbg(dev, "Transitioning from PM state: %s to: %s\n",
- to_mhi_pm_state_str(mhi_cntrl->pm_state),
- to_mhi_pm_state_str(transition_state));
-
- /* We must notify MHI control driver so it can clean up first */
- if (transition_state == MHI_PM_SYS_ERR_PROCESS)
- mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_SYS_ERROR);
-
- mutex_lock(&mhi_cntrl->pm_mutex);
- write_lock_irq(&mhi_cntrl->pm_lock);
- prev_state = mhi_cntrl->pm_state;
- cur_state = mhi_tryset_pm_state(mhi_cntrl, transition_state);
- if (cur_state == transition_state) {
- mhi_cntrl->ee = MHI_EE_DISABLE_TRANSITION;
- mhi_cntrl->dev_state = MHI_STATE_RESET;
- }
- write_unlock_irq(&mhi_cntrl->pm_lock);
-
- /* Wake up threads waiting for state transition */
- wake_up_all(&mhi_cntrl->state_event);
-
- if (cur_state != transition_state) {
- dev_err(dev, "Failed to transition to state: %s from: %s\n",
- to_mhi_pm_state_str(transition_state),
- to_mhi_pm_state_str(cur_state));
- mutex_unlock(&mhi_cntrl->pm_mutex);
- return;
- }
-
- /* Trigger MHI RESET so that the device will not access host memory */
- if (MHI_REG_ACCESS_VALID(prev_state)) {
- u32 in_reset = -1;
- unsigned long timeout = msecs_to_jiffies(mhi_cntrl->timeout_ms);
-
- dev_dbg(dev, "Triggering MHI Reset in device\n");
- mhi_set_mhi_state(mhi_cntrl, MHI_STATE_RESET);
-
- /* Wait for the reset bit to be cleared by the device */
- ret = wait_event_timeout(mhi_cntrl->state_event,
- mhi_read_reg_field(mhi_cntrl,
- mhi_cntrl->regs,
- MHICTRL,
- MHICTRL_RESET_MASK,
- MHICTRL_RESET_SHIFT,
- &in_reset) ||
- !in_reset, timeout);
- if ((!ret || in_reset) && cur_state == MHI_PM_SYS_ERR_PROCESS) {
- dev_err(dev, "Device failed to exit MHI Reset state\n");
- mutex_unlock(&mhi_cntrl->pm_mutex);
- return;
- }
-
- /*
- * Device will clear BHI_INTVEC as a part of RESET processing,
- * hence re-program it
- */
- mhi_write_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_INTVEC, 0);
- }
-
- dev_dbg(dev,
- "Waiting for all pending event ring processing to complete\n");
- mhi_event = mhi_cntrl->mhi_event;
- for (i = 0; i < mhi_cntrl->total_ev_rings; i++, mhi_event++) {
- if (mhi_event->offload_ev)
- continue;
- tasklet_kill(&mhi_event->task);
- }
-
- /* Release lock and wait for all pending threads to complete */
- mutex_unlock(&mhi_cntrl->pm_mutex);
- dev_dbg(dev, "Waiting for all pending threads to complete\n");
- wake_up_all(&mhi_cntrl->state_event);
-
- dev_dbg(dev, "Reset all active channels and remove MHI devices\n");
- device_for_each_child(mhi_cntrl->cntrl_dev, NULL, mhi_destroy_device);
-
- mutex_lock(&mhi_cntrl->pm_mutex);
-
- WARN_ON(atomic_read(&mhi_cntrl->dev_wake));
- WARN_ON(atomic_read(&mhi_cntrl->pending_pkts));
-
- /* Reset the ev rings and cmd rings */
- dev_dbg(dev, "Resetting EV CTXT and CMD CTXT\n");
- mhi_cmd = mhi_cntrl->mhi_cmd;
- cmd_ctxt = mhi_cntrl->mhi_ctxt->cmd_ctxt;
- for (i = 0; i < NR_OF_CMD_RINGS; i++, mhi_cmd++, cmd_ctxt++) {
- struct mhi_ring *ring = &mhi_cmd->ring;
-
- ring->rp = ring->base;
- ring->wp = ring->base;
- cmd_ctxt->rp = cmd_ctxt->rbase;
- cmd_ctxt->wp = cmd_ctxt->rbase;
- }
-
- mhi_event = mhi_cntrl->mhi_event;
- er_ctxt = mhi_cntrl->mhi_ctxt->er_ctxt;
- for (i = 0; i < mhi_cntrl->total_ev_rings; i++, er_ctxt++,
- mhi_event++) {
- struct mhi_ring *ring = &mhi_event->ring;
-
- /* Skip offload events */
- if (mhi_event->offload_ev)
- continue;
-
- ring->rp = ring->base;
- ring->wp = ring->base;
- er_ctxt->rp = er_ctxt->rbase;
- er_ctxt->wp = er_ctxt->rbase;
- }
-
- if (cur_state == MHI_PM_SYS_ERR_PROCESS) {
- mhi_ready_state_transition(mhi_cntrl);
- } else {
- /* Move to disable state */
- write_lock_irq(&mhi_cntrl->pm_lock);
- cur_state = mhi_tryset_pm_state(mhi_cntrl, MHI_PM_DISABLE);
- write_unlock_irq(&mhi_cntrl->pm_lock);
- if (unlikely(cur_state != MHI_PM_DISABLE))
- dev_err(dev, "Error moving from PM state: %s to: %s\n",
- to_mhi_pm_state_str(cur_state),
- to_mhi_pm_state_str(MHI_PM_DISABLE));
- }
-
- dev_dbg(dev, "Exiting with PM state: %s, MHI state: %s\n",
- to_mhi_pm_state_str(mhi_cntrl->pm_state),
- TO_MHI_STATE_STR(mhi_cntrl->dev_state));
-
- mutex_unlock(&mhi_cntrl->pm_mutex);
-}
-
-/* Queue a new work item and schedule work */
-int mhi_queue_state_transition(struct mhi_controller *mhi_cntrl,
- enum dev_st_transition state)
-{
- struct state_transition *item = kmalloc(sizeof(*item), GFP_ATOMIC);
- unsigned long flags;
-
- if (!item)
- return -ENOMEM;
-
- item->state = state;
- spin_lock_irqsave(&mhi_cntrl->transition_lock, flags);
- list_add_tail(&item->node, &mhi_cntrl->transition_list);
- spin_unlock_irqrestore(&mhi_cntrl->transition_lock, flags);
-
- schedule_work(&mhi_cntrl->st_worker);
-
- return 0;
-}
-
-/* SYS_ERR worker */
-void mhi_pm_sys_err_handler(struct mhi_controller *mhi_cntrl)
-{
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
-
- /* skip if controller supports RDDM */
- if (mhi_cntrl->rddm_image) {
- dev_dbg(dev, "Controller supports RDDM, skip SYS_ERROR\n");
- return;
- }
-
- mhi_queue_state_transition(mhi_cntrl, DEV_ST_TRANSITION_SYS_ERR);
-}
-
-/* Device State Transition worker */
-void mhi_pm_st_worker(struct work_struct *work)
-{
- struct state_transition *itr, *tmp;
- LIST_HEAD(head);
- struct mhi_controller *mhi_cntrl = container_of(work,
- struct mhi_controller,
- st_worker);
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
-
- spin_lock_irq(&mhi_cntrl->transition_lock);
- list_splice_tail_init(&mhi_cntrl->transition_list, &head);
- spin_unlock_irq(&mhi_cntrl->transition_lock);
-
- list_for_each_entry_safe(itr, tmp, &head, node) {
- list_del(&itr->node);
- dev_dbg(dev, "Handling state transition: %s\n",
- TO_DEV_STATE_TRANS_STR(itr->state));
-
- switch (itr->state) {
- case DEV_ST_TRANSITION_PBL:
- write_lock_irq(&mhi_cntrl->pm_lock);
- if (MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state))
- mhi_cntrl->ee = mhi_get_exec_env(mhi_cntrl);
- write_unlock_irq(&mhi_cntrl->pm_lock);
- if (MHI_IN_PBL(mhi_cntrl->ee))
- mhi_fw_load_handler(mhi_cntrl);
- break;
- case DEV_ST_TRANSITION_SBL:
- write_lock_irq(&mhi_cntrl->pm_lock);
- mhi_cntrl->ee = MHI_EE_SBL;
- write_unlock_irq(&mhi_cntrl->pm_lock);
- /*
- * The MHI devices are only created when the client
- * device switches its Execution Environment (EE) to
- * either SBL or AMSS states
- */
- mhi_create_devices(mhi_cntrl);
- break;
- case DEV_ST_TRANSITION_MISSION_MODE:
- mhi_pm_mission_mode_transition(mhi_cntrl);
- break;
- case DEV_ST_TRANSITION_READY:
- mhi_ready_state_transition(mhi_cntrl);
- break;
- case DEV_ST_TRANSITION_SYS_ERR:
- mhi_pm_disable_transition
- (mhi_cntrl, MHI_PM_SYS_ERR_PROCESS);
- break;
- case DEV_ST_TRANSITION_DISABLE:
- mhi_pm_disable_transition
- (mhi_cntrl, MHI_PM_SHUTDOWN_PROCESS);
- break;
- default:
- break;
- }
- kfree(itr);
- }
-}
-
-int mhi_pm_suspend(struct mhi_controller *mhi_cntrl)
-{
- struct mhi_chan *itr, *tmp;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- enum mhi_pm_state new_state;
- int ret;
-
- if (mhi_cntrl->pm_state == MHI_PM_DISABLE)
- return -EINVAL;
-
- if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state))
- return -EIO;
-
- /* Return busy if there are any pending resources */
- if (atomic_read(&mhi_cntrl->dev_wake) ||
- atomic_read(&mhi_cntrl->pending_pkts))
- return -EBUSY;
-
- /* Take MHI out of M2 state */
- read_lock_bh(&mhi_cntrl->pm_lock);
- mhi_cntrl->wake_get(mhi_cntrl, false);
- read_unlock_bh(&mhi_cntrl->pm_lock);
-
- ret = wait_event_timeout(mhi_cntrl->state_event,
- mhi_cntrl->dev_state == MHI_STATE_M0 ||
- mhi_cntrl->dev_state == MHI_STATE_M1 ||
- MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state),
- msecs_to_jiffies(mhi_cntrl->timeout_ms));
-
- read_lock_bh(&mhi_cntrl->pm_lock);
- mhi_cntrl->wake_put(mhi_cntrl, false);
- read_unlock_bh(&mhi_cntrl->pm_lock);
-
- if (!ret || MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
- dev_err(dev,
- "Could not enter M0/M1 state");
- return -EIO;
- }
-
- write_lock_irq(&mhi_cntrl->pm_lock);
-
- if (atomic_read(&mhi_cntrl->dev_wake) ||
- atomic_read(&mhi_cntrl->pending_pkts)) {
- write_unlock_irq(&mhi_cntrl->pm_lock);
- return -EBUSY;
- }
-
- dev_info(dev, "Allowing M3 transition\n");
- new_state = mhi_tryset_pm_state(mhi_cntrl, MHI_PM_M3_ENTER);
- if (new_state != MHI_PM_M3_ENTER) {
- write_unlock_irq(&mhi_cntrl->pm_lock);
- dev_err(dev,
- "Error setting to PM state: %s from: %s\n",
- to_mhi_pm_state_str(MHI_PM_M3_ENTER),
- to_mhi_pm_state_str(mhi_cntrl->pm_state));
- return -EIO;
- }
-
- /* Set MHI to M3 and wait for completion */
- mhi_set_mhi_state(mhi_cntrl, MHI_STATE_M3);
- write_unlock_irq(&mhi_cntrl->pm_lock);
- dev_info(dev, "Wait for M3 completion\n");
-
- ret = wait_event_timeout(mhi_cntrl->state_event,
- mhi_cntrl->dev_state == MHI_STATE_M3 ||
- MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state),
- msecs_to_jiffies(mhi_cntrl->timeout_ms));
-
- if (!ret || MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
- dev_err(dev,
- "Did not enter M3 state, MHI state: %s, PM state: %s\n",
- TO_MHI_STATE_STR(mhi_cntrl->dev_state),
- to_mhi_pm_state_str(mhi_cntrl->pm_state));
- return -EIO;
- }
-
- /* Notify clients about entering LPM */
- list_for_each_entry_safe(itr, tmp, &mhi_cntrl->lpm_chans, node) {
- mutex_lock(&itr->mutex);
- if (itr->mhi_dev)
- mhi_notify(itr->mhi_dev, MHI_CB_LPM_ENTER);
- mutex_unlock(&itr->mutex);
- }
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(mhi_pm_suspend);
-
-int mhi_pm_resume(struct mhi_controller *mhi_cntrl)
-{
- struct mhi_chan *itr, *tmp;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- enum mhi_pm_state cur_state;
- int ret;
-
- dev_info(dev, "Entered with PM state: %s, MHI state: %s\n",
- to_mhi_pm_state_str(mhi_cntrl->pm_state),
- TO_MHI_STATE_STR(mhi_cntrl->dev_state));
-
- if (mhi_cntrl->pm_state == MHI_PM_DISABLE)
- return 0;
-
- if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state))
- return -EIO;
-
- /* Notify clients about exiting LPM */
- list_for_each_entry_safe(itr, tmp, &mhi_cntrl->lpm_chans, node) {
- mutex_lock(&itr->mutex);
- if (itr->mhi_dev)
- mhi_notify(itr->mhi_dev, MHI_CB_LPM_EXIT);
- mutex_unlock(&itr->mutex);
- }
-
- write_lock_irq(&mhi_cntrl->pm_lock);
- cur_state = mhi_tryset_pm_state(mhi_cntrl, MHI_PM_M3_EXIT);
- if (cur_state != MHI_PM_M3_EXIT) {
- write_unlock_irq(&mhi_cntrl->pm_lock);
- dev_info(dev,
- "Error setting to PM state: %s from: %s\n",
- to_mhi_pm_state_str(MHI_PM_M3_EXIT),
- to_mhi_pm_state_str(mhi_cntrl->pm_state));
- return -EIO;
- }
-
- /* Set MHI to M0 and wait for completion */
- mhi_set_mhi_state(mhi_cntrl, MHI_STATE_M0);
- write_unlock_irq(&mhi_cntrl->pm_lock);
-
- ret = wait_event_timeout(mhi_cntrl->state_event,
- mhi_cntrl->dev_state == MHI_STATE_M0 ||
- mhi_cntrl->dev_state == MHI_STATE_M2 ||
- MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state),
- msecs_to_jiffies(mhi_cntrl->timeout_ms));
-
- if (!ret || MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
- dev_err(dev,
- "Did not enter M0 state, MHI state: %s, PM state: %s\n",
- TO_MHI_STATE_STR(mhi_cntrl->dev_state),
- to_mhi_pm_state_str(mhi_cntrl->pm_state));
- return -EIO;
- }
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(mhi_pm_resume);
-
-int __mhi_device_get_sync(struct mhi_controller *mhi_cntrl)
-{
- int ret;
-
- /* Wake up the device */
- read_lock_bh(&mhi_cntrl->pm_lock);
- mhi_cntrl->wake_get(mhi_cntrl, true);
- if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state))
- mhi_trigger_resume(mhi_cntrl);
- read_unlock_bh(&mhi_cntrl->pm_lock);
-
- ret = wait_event_timeout(mhi_cntrl->state_event,
- mhi_cntrl->pm_state == MHI_PM_M0 ||
- MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state),
- msecs_to_jiffies(mhi_cntrl->timeout_ms));
-
- if (!ret || MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
- read_lock_bh(&mhi_cntrl->pm_lock);
- mhi_cntrl->wake_put(mhi_cntrl, false);
- read_unlock_bh(&mhi_cntrl->pm_lock);
- return -EIO;
- }
-
- return 0;
-}
-
-/* Assert device wake db */
-static void mhi_assert_dev_wake(struct mhi_controller *mhi_cntrl, bool force)
-{
- unsigned long flags;
-
- /*
- * If force flag is set, then increment the wake count value and
- * ring wake db
- */
- if (unlikely(force)) {
- spin_lock_irqsave(&mhi_cntrl->wlock, flags);
- atomic_inc(&mhi_cntrl->dev_wake);
- if (MHI_WAKE_DB_FORCE_SET_VALID(mhi_cntrl->pm_state) &&
- !mhi_cntrl->wake_set) {
- mhi_write_db(mhi_cntrl, mhi_cntrl->wake_db, 1);
- mhi_cntrl->wake_set = true;
- }
- spin_unlock_irqrestore(&mhi_cntrl->wlock, flags);
- } else {
- /*
- * If resources are already requested, then just increment
- * the wake count value and return
- */
- if (likely(atomic_add_unless(&mhi_cntrl->dev_wake, 1, 0)))
- return;
-
- spin_lock_irqsave(&mhi_cntrl->wlock, flags);
- if ((atomic_inc_return(&mhi_cntrl->dev_wake) == 1) &&
- MHI_WAKE_DB_SET_VALID(mhi_cntrl->pm_state) &&
- !mhi_cntrl->wake_set) {
- mhi_write_db(mhi_cntrl, mhi_cntrl->wake_db, 1);
- mhi_cntrl->wake_set = true;
- }
- spin_unlock_irqrestore(&mhi_cntrl->wlock, flags);
- }
-}
-
-/* De-assert device wake db */
-static void mhi_deassert_dev_wake(struct mhi_controller *mhi_cntrl,
- bool override)
-{
- unsigned long flags;
-
- /*
- * Only continue if there is a single resource, else just decrement
- * and return
- */
- if (likely(atomic_add_unless(&mhi_cntrl->dev_wake, -1, 1)))
- return;
-
- spin_lock_irqsave(&mhi_cntrl->wlock, flags);
- if ((atomic_dec_return(&mhi_cntrl->dev_wake) == 0) &&
- MHI_WAKE_DB_CLEAR_VALID(mhi_cntrl->pm_state) && !override &&
- mhi_cntrl->wake_set) {
- mhi_write_db(mhi_cntrl, mhi_cntrl->wake_db, 0);
- mhi_cntrl->wake_set = false;
- }
- spin_unlock_irqrestore(&mhi_cntrl->wlock, flags);
-}
-
-int mhi_async_power_up(struct mhi_controller *mhi_cntrl)
-{
- enum mhi_state state;
- enum mhi_ee_type current_ee;
- enum dev_st_transition next_state;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- u32 val;
- int ret;
-
- dev_info(dev, "Requested to power ON\n");
-
- if (mhi_cntrl->nr_irqs < 1)
- return -EINVAL;
-
- /* Supply default wake routines if not provided by controller driver */
- if (!mhi_cntrl->wake_get || !mhi_cntrl->wake_put ||
- !mhi_cntrl->wake_toggle) {
- mhi_cntrl->wake_get = mhi_assert_dev_wake;
- mhi_cntrl->wake_put = mhi_deassert_dev_wake;
- mhi_cntrl->wake_toggle = (mhi_cntrl->db_access & MHI_PM_M2) ?
- mhi_toggle_dev_wake_nop : mhi_toggle_dev_wake;
- }
-
- mutex_lock(&mhi_cntrl->pm_mutex);
- mhi_cntrl->pm_state = MHI_PM_DISABLE;
-
- if (!mhi_cntrl->pre_init) {
- /* Setup device context */
- ret = mhi_init_dev_ctxt(mhi_cntrl);
- if (ret)
- goto error_dev_ctxt;
- }
-
- ret = mhi_init_irq_setup(mhi_cntrl);
- if (ret)
- goto error_setup_irq;
-
- /* Setup BHI offset & INTVEC */
- write_lock_irq(&mhi_cntrl->pm_lock);
- ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->regs, BHIOFF, &val);
- if (ret) {
- write_unlock_irq(&mhi_cntrl->pm_lock);
- goto error_bhi_offset;
- }
-
- mhi_cntrl->bhi = mhi_cntrl->regs + val;
-
- /* Setup BHIE offset */
- if (mhi_cntrl->fbc_download) {
- ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->regs, BHIEOFF, &val);
- if (ret) {
- write_unlock_irq(&mhi_cntrl->pm_lock);
- dev_err(dev, "Error reading BHIE offset\n");
- goto error_bhi_offset;
- }
-
- mhi_cntrl->bhie = mhi_cntrl->regs + val;
- }
-
- mhi_write_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_INTVEC, 0);
- mhi_cntrl->pm_state = MHI_PM_POR;
- mhi_cntrl->ee = MHI_EE_MAX;
- current_ee = mhi_get_exec_env(mhi_cntrl);
- write_unlock_irq(&mhi_cntrl->pm_lock);
-
- /* Confirm that the device is in valid exec env */
- if (!MHI_IN_PBL(current_ee) && current_ee != MHI_EE_AMSS) {
- dev_err(dev, "Not a valid EE for power on\n");
- ret = -EIO;
- goto error_bhi_offset;
- }
-
- state = mhi_get_mhi_state(mhi_cntrl);
- if (state == MHI_STATE_SYS_ERR) {
- mhi_set_mhi_state(mhi_cntrl, MHI_STATE_RESET);
- ret = wait_event_timeout(mhi_cntrl->state_event,
- MHI_PM_IN_FATAL_STATE(mhi_cntrl->pm_state) ||
- mhi_read_reg_field(mhi_cntrl,
- mhi_cntrl->regs,
- MHICTRL,
- MHICTRL_RESET_MASK,
- MHICTRL_RESET_SHIFT,
- &val) ||
- !val,
- msecs_to_jiffies(mhi_cntrl->timeout_ms));
- if (!ret) {
- ret = -EIO;
- dev_info(dev, "Failed to reset MHI due to syserr state\n");
- goto error_bhi_offset;
- }
-
- /*
- * device cleares INTVEC as part of RESET processing,
- * re-program it
- */
- mhi_write_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_INTVEC, 0);
- }
-
- /* Transition to next state */
- next_state = MHI_IN_PBL(current_ee) ?
- DEV_ST_TRANSITION_PBL : DEV_ST_TRANSITION_READY;
-
- mhi_queue_state_transition(mhi_cntrl, next_state);
-
- mutex_unlock(&mhi_cntrl->pm_mutex);
-
- dev_info(dev, "Power on setup success\n");
-
- return 0;
-
-error_bhi_offset:
- mhi_deinit_free_irq(mhi_cntrl);
-
-error_setup_irq:
- if (!mhi_cntrl->pre_init)
- mhi_deinit_dev_ctxt(mhi_cntrl);
-
-error_dev_ctxt:
- mutex_unlock(&mhi_cntrl->pm_mutex);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(mhi_async_power_up);
-
-void mhi_power_down(struct mhi_controller *mhi_cntrl, bool graceful)
-{
- enum mhi_pm_state cur_state;
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
-
- /* If it's not a graceful shutdown, force MHI to linkdown state */
- if (!graceful) {
- mutex_lock(&mhi_cntrl->pm_mutex);
- write_lock_irq(&mhi_cntrl->pm_lock);
- cur_state = mhi_tryset_pm_state(mhi_cntrl,
- MHI_PM_LD_ERR_FATAL_DETECT);
- write_unlock_irq(&mhi_cntrl->pm_lock);
- mutex_unlock(&mhi_cntrl->pm_mutex);
- if (cur_state != MHI_PM_LD_ERR_FATAL_DETECT)
- dev_dbg(dev, "Failed to move to state: %s from: %s\n",
- to_mhi_pm_state_str(MHI_PM_LD_ERR_FATAL_DETECT),
- to_mhi_pm_state_str(mhi_cntrl->pm_state));
- }
-
- mhi_queue_state_transition(mhi_cntrl, DEV_ST_TRANSITION_DISABLE);
-
- /* Wait for shutdown to complete */
- flush_work(&mhi_cntrl->st_worker);
-
- mhi_deinit_free_irq(mhi_cntrl);
-
- if (!mhi_cntrl->pre_init) {
- /* Free all allocated resources */
- if (mhi_cntrl->fbc_image) {
- mhi_free_bhie_table(mhi_cntrl, mhi_cntrl->fbc_image);
- mhi_cntrl->fbc_image = NULL;
- }
- mhi_deinit_dev_ctxt(mhi_cntrl);
- }
-}
-EXPORT_SYMBOL_GPL(mhi_power_down);
-
-int mhi_sync_power_up(struct mhi_controller *mhi_cntrl)
-{
- int ret = mhi_async_power_up(mhi_cntrl);
-
- if (ret)
- return ret;
-
- wait_event_timeout(mhi_cntrl->state_event,
- MHI_IN_MISSION_MODE(mhi_cntrl->ee) ||
- MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state),
- msecs_to_jiffies(mhi_cntrl->timeout_ms));
-
- ret = (MHI_IN_MISSION_MODE(mhi_cntrl->ee)) ? 0 : -ETIMEDOUT;
- if (ret)
- mhi_power_down(mhi_cntrl, false);
-
- return ret;
-}
-EXPORT_SYMBOL(mhi_sync_power_up);
-
-int mhi_force_rddm_mode(struct mhi_controller *mhi_cntrl)
-{
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
- int ret;
-
- /* Check if device is already in RDDM */
- if (mhi_cntrl->ee == MHI_EE_RDDM)
- return 0;
-
- dev_dbg(dev, "Triggering SYS_ERR to force RDDM state\n");
- mhi_set_mhi_state(mhi_cntrl, MHI_STATE_SYS_ERR);
-
- /* Wait for RDDM event */
- ret = wait_event_timeout(mhi_cntrl->state_event,
- mhi_cntrl->ee == MHI_EE_RDDM,
- msecs_to_jiffies(mhi_cntrl->timeout_ms));
- ret = ret ? 0 : -EIO;
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(mhi_force_rddm_mode);
-
-void mhi_device_get(struct mhi_device *mhi_dev)
-{
- struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
-
- mhi_dev->dev_wake++;
- read_lock_bh(&mhi_cntrl->pm_lock);
- if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state))
- mhi_trigger_resume(mhi_cntrl);
-
- mhi_cntrl->wake_get(mhi_cntrl, true);
- read_unlock_bh(&mhi_cntrl->pm_lock);
-}
-EXPORT_SYMBOL_GPL(mhi_device_get);
-
-int mhi_device_get_sync(struct mhi_device *mhi_dev)
-{
- struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
- int ret;
-
- ret = __mhi_device_get_sync(mhi_cntrl);
- if (!ret)
- mhi_dev->dev_wake++;
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(mhi_device_get_sync);
-
-void mhi_device_put(struct mhi_device *mhi_dev)
-{
- struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
-
- mhi_dev->dev_wake--;
- read_lock_bh(&mhi_cntrl->pm_lock);
- if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state))
- mhi_trigger_resume(mhi_cntrl);
-
- mhi_cntrl->wake_put(mhi_cntrl, false);
- read_unlock_bh(&mhi_cntrl->pm_lock);
-}
-EXPORT_SYMBOL_GPL(mhi_device_put);
diff --git a/drivers/bus/mhi/host/Kconfig b/drivers/bus/mhi/host/Kconfig
new file mode 100644
index 000000000000..da5cd0c9fc62
--- /dev/null
+++ b/drivers/bus/mhi/host/Kconfig
@@ -0,0 +1,31 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# MHI bus
+#
+# Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
+#
+
+config MHI_BUS
+ tristate "Modem Host Interface (MHI) bus"
+ help
+ Bus driver for MHI protocol. Modem Host Interface (MHI) is a
+ communication protocol used by the host processors to control
+ and communicate with modem devices over a high speed peripheral
+ bus or shared memory.
+
+config MHI_BUS_DEBUG
+ bool "Debugfs support for the MHI bus"
+ depends on MHI_BUS && DEBUG_FS
+ help
+ Enable debugfs support for use with the MHI transport. Allows
+ reading and/or modifying some values within the MHI controller
+ for debug and test purposes.
+
+config MHI_BUS_PCI_GENERIC
+ tristate "MHI PCI controller driver"
+ depends on MHI_BUS
+ depends on PCI
+ help
+ This driver provides MHI PCI controller driver for devices such as
+ Qualcomm SDX55 based PCIe modems.
+
diff --git a/drivers/bus/mhi/host/Makefile b/drivers/bus/mhi/host/Makefile
new file mode 100644
index 000000000000..859c2f38451c
--- /dev/null
+++ b/drivers/bus/mhi/host/Makefile
@@ -0,0 +1,6 @@
+obj-$(CONFIG_MHI_BUS) += mhi.o
+mhi-y := init.o main.o pm.o boot.o
+mhi-$(CONFIG_MHI_BUS_DEBUG) += debugfs.o
+
+obj-$(CONFIG_MHI_BUS_PCI_GENERIC) += mhi_pci_generic.o
+mhi_pci_generic-y += pci_generic.o
diff --git a/drivers/bus/mhi/host/boot.c b/drivers/bus/mhi/host/boot.c
new file mode 100644
index 000000000000..24422f5c3d80
--- /dev/null
+++ b/drivers/bus/mhi/host/boot.c
@@ -0,0 +1,525 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-direction.h>
+#include <linux/dma-mapping.h>
+#include <linux/firmware.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/mhi.h>
+#include <linux/module.h>
+#include <linux/random.h>
+#include <linux/slab.h>
+#include <linux/wait.h>
+#include "internal.h"
+
+/* Setup RDDM vector table for RDDM transfer and program RXVEC */
+void mhi_rddm_prepare(struct mhi_controller *mhi_cntrl,
+ struct image_info *img_info)
+{
+ struct mhi_buf *mhi_buf = img_info->mhi_buf;
+ struct bhi_vec_entry *bhi_vec = img_info->bhi_vec;
+ void __iomem *base = mhi_cntrl->bhie;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ u32 sequence_id;
+ unsigned int i;
+
+ for (i = 0; i < img_info->entries - 1; i++, mhi_buf++, bhi_vec++) {
+ bhi_vec->dma_addr = mhi_buf->dma_addr;
+ bhi_vec->size = mhi_buf->len;
+ }
+
+ dev_dbg(dev, "BHIe programming for RDDM\n");
+
+ mhi_write_reg(mhi_cntrl, base, BHIE_RXVECADDR_HIGH_OFFS,
+ upper_32_bits(mhi_buf->dma_addr));
+
+ mhi_write_reg(mhi_cntrl, base, BHIE_RXVECADDR_LOW_OFFS,
+ lower_32_bits(mhi_buf->dma_addr));
+
+ mhi_write_reg(mhi_cntrl, base, BHIE_RXVECSIZE_OFFS, mhi_buf->len);
+ sequence_id = MHI_RANDOM_U32_NONZERO(BHIE_RXVECSTATUS_SEQNUM_BMSK);
+
+ mhi_write_reg_field(mhi_cntrl, base, BHIE_RXVECDB_OFFS,
+ BHIE_RXVECDB_SEQNUM_BMSK, BHIE_RXVECDB_SEQNUM_SHFT,
+ sequence_id);
+
+ dev_dbg(dev, "Address: %p and len: 0x%zx sequence: %u\n",
+ &mhi_buf->dma_addr, mhi_buf->len, sequence_id);
+}
+
+/* Collect RDDM buffer during kernel panic */
+static int __mhi_download_rddm_in_panic(struct mhi_controller *mhi_cntrl)
+{
+ int ret;
+ u32 rx_status;
+ enum mhi_ee_type ee;
+ const u32 delayus = 2000;
+ u32 retry = (mhi_cntrl->timeout_ms * 1000) / delayus;
+ const u32 rddm_timeout_us = 200000;
+ int rddm_retry = rddm_timeout_us / delayus;
+ void __iomem *base = mhi_cntrl->bhie;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+
+ dev_dbg(dev, "Entered with pm_state:%s dev_state:%s ee:%s\n",
+ to_mhi_pm_state_str(mhi_cntrl->pm_state),
+ TO_MHI_STATE_STR(mhi_cntrl->dev_state),
+ TO_MHI_EXEC_STR(mhi_cntrl->ee));
+
+ /*
+ * This should only be executing during a kernel panic, we expect all
+ * other cores to shutdown while we're collecting RDDM buffer. After
+ * returning from this function, we expect the device to reset.
+ *
+ * Normaly, we read/write pm_state only after grabbing the
+ * pm_lock, since we're in a panic, skipping it. Also there is no
+ * gurantee that this state change would take effect since
+ * we're setting it w/o grabbing pm_lock
+ */
+ mhi_cntrl->pm_state = MHI_PM_LD_ERR_FATAL_DETECT;
+ /* update should take the effect immediately */
+ smp_wmb();
+
+ /*
+ * Make sure device is not already in RDDM. In case the device asserts
+ * and a kernel panic follows, device will already be in RDDM.
+ * Do not trigger SYS ERR again and proceed with waiting for
+ * image download completion.
+ */
+ ee = mhi_get_exec_env(mhi_cntrl);
+ if (ee != MHI_EE_RDDM) {
+ dev_dbg(dev, "Trigger device into RDDM mode using SYS ERR\n");
+ mhi_set_mhi_state(mhi_cntrl, MHI_STATE_SYS_ERR);
+
+ dev_dbg(dev, "Waiting for device to enter RDDM\n");
+ while (rddm_retry--) {
+ ee = mhi_get_exec_env(mhi_cntrl);
+ if (ee == MHI_EE_RDDM)
+ break;
+
+ udelay(delayus);
+ }
+
+ if (rddm_retry <= 0) {
+ /* Hardware reset so force device to enter RDDM */
+ dev_dbg(dev,
+ "Did not enter RDDM, do a host req reset\n");
+ mhi_write_reg(mhi_cntrl, mhi_cntrl->regs,
+ MHI_SOC_RESET_REQ_OFFSET,
+ MHI_SOC_RESET_REQ);
+ udelay(delayus);
+ }
+
+ ee = mhi_get_exec_env(mhi_cntrl);
+ }
+
+ dev_dbg(dev,
+ "Waiting for RDDM image download via BHIe, current EE:%s\n",
+ TO_MHI_EXEC_STR(ee));
+
+ while (retry--) {
+ ret = mhi_read_reg_field(mhi_cntrl, base, BHIE_RXVECSTATUS_OFFS,
+ BHIE_RXVECSTATUS_STATUS_BMSK,
+ BHIE_RXVECSTATUS_STATUS_SHFT,
+ &rx_status);
+ if (ret)
+ return -EIO;
+
+ if (rx_status == BHIE_RXVECSTATUS_STATUS_XFER_COMPL)
+ return 0;
+
+ udelay(delayus);
+ }
+
+ ee = mhi_get_exec_env(mhi_cntrl);
+ ret = mhi_read_reg(mhi_cntrl, base, BHIE_RXVECSTATUS_OFFS, &rx_status);
+
+ dev_err(dev, "Did not complete RDDM transfer\n");
+ dev_err(dev, "Current EE: %s\n", TO_MHI_EXEC_STR(ee));
+ dev_err(dev, "RXVEC_STATUS: 0x%x\n", rx_status);
+
+ return -EIO;
+}
+
+/* Download RDDM image from device */
+int mhi_download_rddm_img(struct mhi_controller *mhi_cntrl, bool in_panic)
+{
+ void __iomem *base = mhi_cntrl->bhie;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ u32 rx_status;
+
+ if (in_panic)
+ return __mhi_download_rddm_in_panic(mhi_cntrl);
+
+ dev_dbg(dev, "Waiting for RDDM image download via BHIe\n");
+
+ /* Wait for the image download to complete */
+ wait_event_timeout(mhi_cntrl->state_event,
+ mhi_read_reg_field(mhi_cntrl, base,
+ BHIE_RXVECSTATUS_OFFS,
+ BHIE_RXVECSTATUS_STATUS_BMSK,
+ BHIE_RXVECSTATUS_STATUS_SHFT,
+ &rx_status) || rx_status,
+ msecs_to_jiffies(mhi_cntrl->timeout_ms));
+
+ return (rx_status == BHIE_RXVECSTATUS_STATUS_XFER_COMPL) ? 0 : -EIO;
+}
+EXPORT_SYMBOL_GPL(mhi_download_rddm_img);
+
+static int mhi_fw_load_amss(struct mhi_controller *mhi_cntrl,
+ const struct mhi_buf *mhi_buf)
+{
+ void __iomem *base = mhi_cntrl->bhie;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ rwlock_t *pm_lock = &mhi_cntrl->pm_lock;
+ u32 tx_status, sequence_id;
+ int ret;
+
+ read_lock_bh(pm_lock);
+ if (!MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state)) {
+ read_unlock_bh(pm_lock);
+ return -EIO;
+ }
+
+ sequence_id = MHI_RANDOM_U32_NONZERO(BHIE_TXVECSTATUS_SEQNUM_BMSK);
+ dev_dbg(dev, "Starting AMSS download via BHIe. Sequence ID:%u\n",
+ sequence_id);
+ mhi_write_reg(mhi_cntrl, base, BHIE_TXVECADDR_HIGH_OFFS,
+ upper_32_bits(mhi_buf->dma_addr));
+
+ mhi_write_reg(mhi_cntrl, base, BHIE_TXVECADDR_LOW_OFFS,
+ lower_32_bits(mhi_buf->dma_addr));
+
+ mhi_write_reg(mhi_cntrl, base, BHIE_TXVECSIZE_OFFS, mhi_buf->len);
+
+ mhi_write_reg_field(mhi_cntrl, base, BHIE_TXVECDB_OFFS,
+ BHIE_TXVECDB_SEQNUM_BMSK, BHIE_TXVECDB_SEQNUM_SHFT,
+ sequence_id);
+ read_unlock_bh(pm_lock);
+
+ /* Wait for the image download to complete */
+ ret = wait_event_timeout(mhi_cntrl->state_event,
+ MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state) ||
+ mhi_read_reg_field(mhi_cntrl, base,
+ BHIE_TXVECSTATUS_OFFS,
+ BHIE_TXVECSTATUS_STATUS_BMSK,
+ BHIE_TXVECSTATUS_STATUS_SHFT,
+ &tx_status) || tx_status,
+ msecs_to_jiffies(mhi_cntrl->timeout_ms));
+ if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state) ||
+ tx_status != BHIE_TXVECSTATUS_STATUS_XFER_COMPL)
+ return -EIO;
+
+ return (!ret) ? -ETIMEDOUT : 0;
+}
+
+static int mhi_fw_load_sbl(struct mhi_controller *mhi_cntrl,
+ dma_addr_t dma_addr,
+ size_t size)
+{
+ u32 tx_status, val, session_id;
+ int i, ret;
+ void __iomem *base = mhi_cntrl->bhi;
+ rwlock_t *pm_lock = &mhi_cntrl->pm_lock;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ struct {
+ char *name;
+ u32 offset;
+ } error_reg[] = {
+ { "ERROR_CODE", BHI_ERRCODE },
+ { "ERROR_DBG1", BHI_ERRDBG1 },
+ { "ERROR_DBG2", BHI_ERRDBG2 },
+ { "ERROR_DBG3", BHI_ERRDBG3 },
+ { NULL },
+ };
+
+ read_lock_bh(pm_lock);
+ if (!MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state)) {
+ read_unlock_bh(pm_lock);
+ goto invalid_pm_state;
+ }
+
+ session_id = MHI_RANDOM_U32_NONZERO(BHI_TXDB_SEQNUM_BMSK);
+ dev_dbg(dev, "Starting SBL download via BHI. Session ID:%u\n",
+ session_id);
+ mhi_write_reg(mhi_cntrl, base, BHI_STATUS, 0);
+ mhi_write_reg(mhi_cntrl, base, BHI_IMGADDR_HIGH,
+ upper_32_bits(dma_addr));
+ mhi_write_reg(mhi_cntrl, base, BHI_IMGADDR_LOW,
+ lower_32_bits(dma_addr));
+ mhi_write_reg(mhi_cntrl, base, BHI_IMGSIZE, size);
+ mhi_write_reg(mhi_cntrl, base, BHI_IMGTXDB, session_id);
+ read_unlock_bh(pm_lock);
+
+ /* Wait for the image download to complete */
+ ret = wait_event_timeout(mhi_cntrl->state_event,
+ MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state) ||
+ mhi_read_reg_field(mhi_cntrl, base, BHI_STATUS,
+ BHI_STATUS_MASK, BHI_STATUS_SHIFT,
+ &tx_status) || tx_status,
+ msecs_to_jiffies(mhi_cntrl->timeout_ms));
+ if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state))
+ goto invalid_pm_state;
+
+ if (tx_status == BHI_STATUS_ERROR) {
+ dev_err(dev, "Image transfer failed\n");
+ read_lock_bh(pm_lock);
+ if (MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state)) {
+ for (i = 0; error_reg[i].name; i++) {
+ ret = mhi_read_reg(mhi_cntrl, base,
+ error_reg[i].offset, &val);
+ if (ret)
+ break;
+ dev_err(dev, "Reg: %s value: 0x%x\n",
+ error_reg[i].name, val);
+ }
+ }
+ read_unlock_bh(pm_lock);
+ goto invalid_pm_state;
+ }
+
+ return (!ret) ? -ETIMEDOUT : 0;
+
+invalid_pm_state:
+
+ return -EIO;
+}
+
+void mhi_free_bhie_table(struct mhi_controller *mhi_cntrl,
+ struct image_info *image_info)
+{
+ int i;
+ struct mhi_buf *mhi_buf = image_info->mhi_buf;
+
+ for (i = 0; i < image_info->entries; i++, mhi_buf++)
+ mhi_free_coherent(mhi_cntrl, mhi_buf->len, mhi_buf->buf,
+ mhi_buf->dma_addr);
+
+ kfree(image_info->mhi_buf);
+ kfree(image_info);
+}
+
+int mhi_alloc_bhie_table(struct mhi_controller *mhi_cntrl,
+ struct image_info **image_info,
+ size_t alloc_size)
+{
+ size_t seg_size = mhi_cntrl->seg_len;
+ int segments = DIV_ROUND_UP(alloc_size, seg_size) + 1;
+ int i;
+ struct image_info *img_info;
+ struct mhi_buf *mhi_buf;
+
+ img_info = kzalloc(sizeof(*img_info), GFP_KERNEL);
+ if (!img_info)
+ return -ENOMEM;
+
+ /* Allocate memory for entries */
+ img_info->mhi_buf = kcalloc(segments, sizeof(*img_info->mhi_buf),
+ GFP_KERNEL);
+ if (!img_info->mhi_buf)
+ goto error_alloc_mhi_buf;
+
+ /* Allocate and populate vector table */
+ mhi_buf = img_info->mhi_buf;
+ for (i = 0; i < segments; i++, mhi_buf++) {
+ size_t vec_size = seg_size;
+
+ /* Vector table is the last entry */
+ if (i == segments - 1)
+ vec_size = sizeof(struct bhi_vec_entry) * i;
+
+ mhi_buf->len = vec_size;
+ mhi_buf->buf = mhi_alloc_coherent(mhi_cntrl, vec_size,
+ &mhi_buf->dma_addr,
+ GFP_KERNEL);
+ if (!mhi_buf->buf)
+ goto error_alloc_segment;
+ }
+
+ img_info->bhi_vec = img_info->mhi_buf[segments - 1].buf;
+ img_info->entries = segments;
+ *image_info = img_info;
+
+ return 0;
+
+error_alloc_segment:
+ for (--i, --mhi_buf; i >= 0; i--, mhi_buf--)
+ mhi_free_coherent(mhi_cntrl, mhi_buf->len, mhi_buf->buf,
+ mhi_buf->dma_addr);
+
+error_alloc_mhi_buf:
+ kfree(img_info);
+
+ return -ENOMEM;
+}
+
+static void mhi_firmware_copy(struct mhi_controller *mhi_cntrl,
+ const struct firmware *firmware,
+ struct image_info *img_info)
+{
+ size_t remainder = firmware->size;
+ size_t to_cpy;
+ const u8 *buf = firmware->data;
+ int i = 0;
+ struct mhi_buf *mhi_buf = img_info->mhi_buf;
+ struct bhi_vec_entry *bhi_vec = img_info->bhi_vec;
+
+ while (remainder) {
+ to_cpy = min(remainder, mhi_buf->len);
+ memcpy(mhi_buf->buf, buf, to_cpy);
+ bhi_vec->dma_addr = mhi_buf->dma_addr;
+ bhi_vec->size = to_cpy;
+
+ buf += to_cpy;
+ remainder -= to_cpy;
+ i++;
+ bhi_vec++;
+ mhi_buf++;
+ }
+}
+
+void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl)
+{
+ const struct firmware *firmware = NULL;
+ struct image_info *image_info;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ const char *fw_name;
+ void *buf;
+ dma_addr_t dma_addr;
+ size_t size;
+ int i, ret;
+
+ if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
+ dev_err(dev, "Device MHI is not in valid state\n");
+ return;
+ }
+
+ /* save hardware info from BHI */
+ ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_SERIALNU,
+ &mhi_cntrl->serial_number);
+ if (ret)
+ dev_err(dev, "Could not capture serial number via BHI\n");
+
+ for (i = 0; i < ARRAY_SIZE(mhi_cntrl->oem_pk_hash); i++) {
+ ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_OEMPKHASH(i),
+ &mhi_cntrl->oem_pk_hash[i]);
+ if (ret) {
+ dev_err(dev, "Could not capture OEM PK HASH via BHI\n");
+ break;
+ }
+ }
+
+ /* If device is in pass through, do reset to ready state transition */
+ if (mhi_cntrl->ee == MHI_EE_PTHRU)
+ goto fw_load_ee_pthru;
+
+ fw_name = (mhi_cntrl->ee == MHI_EE_EDL) ?
+ mhi_cntrl->edl_image : mhi_cntrl->fw_image;
+
+ if (!fw_name || (mhi_cntrl->fbc_download && (!mhi_cntrl->sbl_size ||
+ !mhi_cntrl->seg_len))) {
+ dev_err(dev,
+ "No firmware image defined or !sbl_size || !seg_len\n");
+ return;
+ }
+
+ ret = request_firmware(&firmware, fw_name, dev);
+ if (ret) {
+ dev_err(dev, "Error loading firmware: %d\n", ret);
+ return;
+ }
+
+ size = (mhi_cntrl->fbc_download) ? mhi_cntrl->sbl_size : firmware->size;
+
+ /* SBL size provided is maximum size, not necessarily the image size */
+ if (size > firmware->size)
+ size = firmware->size;
+
+ buf = mhi_alloc_coherent(mhi_cntrl, size, &dma_addr, GFP_KERNEL);
+ if (!buf) {
+ release_firmware(firmware);
+ return;
+ }
+
+ /* Download SBL image */
+ memcpy(buf, firmware->data, size);
+ ret = mhi_fw_load_sbl(mhi_cntrl, dma_addr, size);
+ mhi_free_coherent(mhi_cntrl, size, buf, dma_addr);
+
+ if (!mhi_cntrl->fbc_download || ret || mhi_cntrl->ee == MHI_EE_EDL)
+ release_firmware(firmware);
+
+ /* Error or in EDL mode, we're done */
+ if (ret) {
+ dev_err(dev, "MHI did not load SBL, ret:%d\n", ret);
+ return;
+ }
+
+ if (mhi_cntrl->ee == MHI_EE_EDL)
+ return;
+
+ write_lock_irq(&mhi_cntrl->pm_lock);
+ mhi_cntrl->dev_state = MHI_STATE_RESET;
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+
+ /*
+ * If we're doing fbc, populate vector tables while
+ * device transitioning into MHI READY state
+ */
+ if (mhi_cntrl->fbc_download) {
+ ret = mhi_alloc_bhie_table(mhi_cntrl, &mhi_cntrl->fbc_image,
+ firmware->size);
+ if (ret)
+ goto error_alloc_fw_table;
+
+ /* Load the firmware into BHIE vec table */
+ mhi_firmware_copy(mhi_cntrl, firmware, mhi_cntrl->fbc_image);
+ }
+
+fw_load_ee_pthru:
+ /* Transitioning into MHI RESET->READY state */
+ ret = mhi_ready_state_transition(mhi_cntrl);
+
+ if (!mhi_cntrl->fbc_download)
+ return;
+
+ if (ret) {
+ dev_err(dev, "MHI did not enter READY state\n");
+ goto error_read;
+ }
+
+ /* Wait for the SBL event */
+ ret = wait_event_timeout(mhi_cntrl->state_event,
+ mhi_cntrl->ee == MHI_EE_SBL ||
+ MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state),
+ msecs_to_jiffies(mhi_cntrl->timeout_ms));
+
+ if (!ret || MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
+ dev_err(dev, "MHI did not enter SBL\n");
+ goto error_read;
+ }
+
+ /* Start full firmware image download */
+ image_info = mhi_cntrl->fbc_image;
+ ret = mhi_fw_load_amss(mhi_cntrl,
+ /* Vector table is the last entry */
+ &image_info->mhi_buf[image_info->entries - 1]);
+ if (ret)
+ dev_err(dev, "MHI did not load AMSS, ret:%d\n", ret);
+
+ release_firmware(firmware);
+
+ return;
+
+error_read:
+ mhi_free_bhie_table(mhi_cntrl, mhi_cntrl->fbc_image);
+ mhi_cntrl->fbc_image = NULL;
+
+error_alloc_fw_table:
+ release_firmware(firmware);
+}
diff --git a/drivers/bus/mhi/host/debugfs.c b/drivers/bus/mhi/host/debugfs.c
new file mode 100644
index 000000000000..3a48801e01f4
--- /dev/null
+++ b/drivers/bus/mhi/host/debugfs.c
@@ -0,0 +1,411 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2020, The Linux Foundation. All rights reserved.
+ *
+ */
+
+#include <linux/debugfs.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/mhi.h>
+#include <linux/module.h>
+#include "internal.h"
+
+static int mhi_debugfs_states_show(struct seq_file *m, void *d)
+{
+ struct mhi_controller *mhi_cntrl = m->private;
+
+ /* states */
+ seq_printf(m, "PM state: %s Device: %s MHI state: %s EE: %s wake: %s\n",
+ to_mhi_pm_state_str(mhi_cntrl->pm_state),
+ mhi_is_active(mhi_cntrl) ? "Active" : "Inactive",
+ TO_MHI_STATE_STR(mhi_cntrl->dev_state),
+ TO_MHI_EXEC_STR(mhi_cntrl->ee),
+ mhi_cntrl->wake_set ? "true" : "false");
+
+ /* counters */
+ seq_printf(m, "M0: %u M2: %u M3: %u", mhi_cntrl->M0, mhi_cntrl->M2,
+ mhi_cntrl->M3);
+
+ seq_printf(m, " device wake: %u pending packets: %u\n",
+ atomic_read(&mhi_cntrl->dev_wake),
+ atomic_read(&mhi_cntrl->pending_pkts));
+
+ return 0;
+}
+
+static int mhi_debugfs_events_show(struct seq_file *m, void *d)
+{
+ struct mhi_controller *mhi_cntrl = m->private;
+ struct mhi_event *mhi_event;
+ struct mhi_event_ctxt *er_ctxt;
+ int i;
+
+ if (!mhi_is_active(mhi_cntrl)) {
+ seq_puts(m, "Device not ready\n");
+ return -ENODEV;
+ }
+
+ er_ctxt = mhi_cntrl->mhi_ctxt->er_ctxt;
+ mhi_event = mhi_cntrl->mhi_event;
+ for (i = 0; i < mhi_cntrl->total_ev_rings;
+ i++, er_ctxt++, mhi_event++) {
+ struct mhi_ring *ring = &mhi_event->ring;
+
+ if (mhi_event->offload_ev) {
+ seq_printf(m, "Index: %d is an offload event ring\n",
+ i);
+ continue;
+ }
+
+ seq_printf(m, "Index: %d intmod count: %lu time: %lu",
+ i, (er_ctxt->intmod & EV_CTX_INTMODC_MASK) >>
+ EV_CTX_INTMODC_SHIFT,
+ (er_ctxt->intmod & EV_CTX_INTMODT_MASK) >>
+ EV_CTX_INTMODT_SHIFT);
+
+ seq_printf(m, " base: 0x%0llx len: 0x%llx", er_ctxt->rbase,
+ er_ctxt->rlen);
+
+ seq_printf(m, " rp: 0x%llx wp: 0x%llx", er_ctxt->rp,
+ er_ctxt->wp);
+
+ seq_printf(m, " local rp: 0x%pK db: 0x%pad\n", ring->rp,
+ &mhi_event->db_cfg.db_val);
+ }
+
+ return 0;
+}
+
+static int mhi_debugfs_channels_show(struct seq_file *m, void *d)
+{
+ struct mhi_controller *mhi_cntrl = m->private;
+ struct mhi_chan *mhi_chan;
+ struct mhi_chan_ctxt *chan_ctxt;
+ int i;
+
+ if (!mhi_is_active(mhi_cntrl)) {
+ seq_puts(m, "Device not ready\n");
+ return -ENODEV;
+ }
+
+ mhi_chan = mhi_cntrl->mhi_chan;
+ chan_ctxt = mhi_cntrl->mhi_ctxt->chan_ctxt;
+ for (i = 0; i < mhi_cntrl->max_chan; i++, chan_ctxt++, mhi_chan++) {
+ struct mhi_ring *ring = &mhi_chan->tre_ring;
+
+ if (mhi_chan->offload_ch) {
+ seq_printf(m, "%s(%u) is an offload channel\n",
+ mhi_chan->name, mhi_chan->chan);
+ continue;
+ }
+
+ if (!mhi_chan->mhi_dev)
+ continue;
+
+ seq_printf(m,
+ "%s(%u) state: 0x%lx brstmode: 0x%lx pollcfg: 0x%lx",
+ mhi_chan->name, mhi_chan->chan, (chan_ctxt->chcfg &
+ CHAN_CTX_CHSTATE_MASK) >> CHAN_CTX_CHSTATE_SHIFT,
+ (chan_ctxt->chcfg & CHAN_CTX_BRSTMODE_MASK) >>
+ CHAN_CTX_BRSTMODE_SHIFT, (chan_ctxt->chcfg &
+ CHAN_CTX_POLLCFG_MASK) >> CHAN_CTX_POLLCFG_SHIFT);
+
+ seq_printf(m, " type: 0x%x event ring: %u", chan_ctxt->chtype,
+ chan_ctxt->erindex);
+
+ seq_printf(m, " base: 0x%llx len: 0x%llx rp: 0x%llx wp: 0x%llx",
+ chan_ctxt->rbase, chan_ctxt->rlen, chan_ctxt->rp,
+ chan_ctxt->wp);
+
+ seq_printf(m, " local rp: 0x%pK local wp: 0x%pK db: 0x%pad\n",
+ ring->rp, ring->wp,
+ &mhi_chan->db_cfg.db_val);
+ }
+
+ return 0;
+}
+
+static int mhi_device_info_show(struct device *dev, void *data)
+{
+ struct mhi_device *mhi_dev;
+
+ if (dev->bus != &mhi_bus_type)
+ return 0;
+
+ mhi_dev = to_mhi_device(dev);
+
+ seq_printf((struct seq_file *)data, "%s: type: %s dev_wake: %u",
+ mhi_dev->name, mhi_dev->dev_type ? "Controller" : "Transfer",
+ mhi_dev->dev_wake);
+
+ /* for transfer device types only */
+ if (mhi_dev->dev_type == MHI_DEVICE_XFER)
+ seq_printf((struct seq_file *)data, " channels: %u(UL)/%u(DL)",
+ mhi_dev->ul_chan_id, mhi_dev->dl_chan_id);
+
+ seq_puts((struct seq_file *)data, "\n");
+
+ return 0;
+}
+
+static int mhi_debugfs_devices_show(struct seq_file *m, void *d)
+{
+ struct mhi_controller *mhi_cntrl = m->private;
+
+ if (!mhi_is_active(mhi_cntrl)) {
+ seq_puts(m, "Device not ready\n");
+ return -ENODEV;
+ }
+
+ device_for_each_child(mhi_cntrl->cntrl_dev, m, mhi_device_info_show);
+
+ return 0;
+}
+
+static int mhi_debugfs_regdump_show(struct seq_file *m, void *d)
+{
+ struct mhi_controller *mhi_cntrl = m->private;
+ enum mhi_state state;
+ enum mhi_ee_type ee;
+ int i, ret = -EIO;
+ u32 val;
+ void __iomem *mhi_base = mhi_cntrl->regs;
+ void __iomem *bhi_base = mhi_cntrl->bhi;
+ void __iomem *bhie_base = mhi_cntrl->bhie;
+ void __iomem *wake_db = mhi_cntrl->wake_db;
+ struct {
+ const char *name;
+ int offset;
+ void __iomem *base;
+ } regs[] = {
+ { "MHI_REGLEN", MHIREGLEN, mhi_base},
+ { "MHI_VER", MHIVER, mhi_base},
+ { "MHI_CFG", MHICFG, mhi_base},
+ { "MHI_CTRL", MHICTRL, mhi_base},
+ { "MHI_STATUS", MHISTATUS, mhi_base},
+ { "MHI_WAKE_DB", 0, wake_db},
+ { "BHI_EXECENV", BHI_EXECENV, bhi_base},
+ { "BHI_STATUS", BHI_STATUS, bhi_base},
+ { "BHI_ERRCODE", BHI_ERRCODE, bhi_base},
+ { "BHI_ERRDBG1", BHI_ERRDBG1, bhi_base},
+ { "BHI_ERRDBG2", BHI_ERRDBG2, bhi_base},
+ { "BHI_ERRDBG3", BHI_ERRDBG3, bhi_base},
+ { "BHIE_TXVEC_DB", BHIE_TXVECDB_OFFS, bhie_base},
+ { "BHIE_TXVEC_STATUS", BHIE_TXVECSTATUS_OFFS, bhie_base},
+ { "BHIE_RXVEC_DB", BHIE_RXVECDB_OFFS, bhie_base},
+ { "BHIE_RXVEC_STATUS", BHIE_RXVECSTATUS_OFFS, bhie_base},
+ { NULL },
+ };
+
+ if (!MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state))
+ return ret;
+
+ seq_printf(m, "Host PM state: %s Device state: %s EE: %s\n",
+ to_mhi_pm_state_str(mhi_cntrl->pm_state),
+ TO_MHI_STATE_STR(mhi_cntrl->dev_state),
+ TO_MHI_EXEC_STR(mhi_cntrl->ee));
+
+ state = mhi_get_mhi_state(mhi_cntrl);
+ ee = mhi_get_exec_env(mhi_cntrl);
+ seq_printf(m, "Device EE: %s state: %s\n", TO_MHI_EXEC_STR(ee),
+ TO_MHI_STATE_STR(state));
+
+ for (i = 0; regs[i].name; i++) {
+ if (!regs[i].base)
+ continue;
+ ret = mhi_read_reg(mhi_cntrl, regs[i].base, regs[i].offset,
+ &val);
+ if (ret)
+ continue;
+
+ seq_printf(m, "%s: 0x%x\n", regs[i].name, val);
+ }
+
+ return 0;
+}
+
+static int mhi_debugfs_device_wake_show(struct seq_file *m, void *d)
+{
+ struct mhi_controller *mhi_cntrl = m->private;
+ struct mhi_device *mhi_dev = mhi_cntrl->mhi_dev;
+
+ if (!mhi_is_active(mhi_cntrl)) {
+ seq_puts(m, "Device not ready\n");
+ return -ENODEV;
+ }
+
+ seq_printf(m,
+ "Wake count: %d\n%s\n", mhi_dev->dev_wake,
+ "Usage: echo get/put > device_wake to vote/unvote for M0");
+
+ return 0;
+}
+
+static ssize_t mhi_debugfs_device_wake_write(struct file *file,
+ const char __user *ubuf,
+ size_t count, loff_t *ppos)
+{
+ struct seq_file *m = file->private_data;
+ struct mhi_controller *mhi_cntrl = m->private;
+ struct mhi_device *mhi_dev = mhi_cntrl->mhi_dev;
+ char buf[16];
+ int ret = -EINVAL;
+
+ if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+ return -EFAULT;
+
+ if (!strncmp(buf, "get", 3)) {
+ ret = mhi_device_get_sync(mhi_dev);
+ } else if (!strncmp(buf, "put", 3)) {
+ mhi_device_put(mhi_dev);
+ ret = 0;
+ }
+
+ return ret ? ret : count;
+}
+
+static int mhi_debugfs_timeout_ms_show(struct seq_file *m, void *d)
+{
+ struct mhi_controller *mhi_cntrl = m->private;
+
+ seq_printf(m, "%u ms\n", mhi_cntrl->timeout_ms);
+
+ return 0;
+}
+
+static ssize_t mhi_debugfs_timeout_ms_write(struct file *file,
+ const char __user *ubuf,
+ size_t count, loff_t *ppos)
+{
+ struct seq_file *m = file->private_data;
+ struct mhi_controller *mhi_cntrl = m->private;
+ u32 timeout_ms;
+
+ if (kstrtou32_from_user(ubuf, count, 0, &timeout_ms))
+ return -EINVAL;
+
+ mhi_cntrl->timeout_ms = timeout_ms;
+
+ return count;
+}
+
+static int mhi_debugfs_states_open(struct inode *inode, struct file *fp)
+{
+ return single_open(fp, mhi_debugfs_states_show, inode->i_private);
+}
+
+static int mhi_debugfs_events_open(struct inode *inode, struct file *fp)
+{
+ return single_open(fp, mhi_debugfs_events_show, inode->i_private);
+}
+
+static int mhi_debugfs_channels_open(struct inode *inode, struct file *fp)
+{
+ return single_open(fp, mhi_debugfs_channels_show, inode->i_private);
+}
+
+static int mhi_debugfs_devices_open(struct inode *inode, struct file *fp)
+{
+ return single_open(fp, mhi_debugfs_devices_show, inode->i_private);
+}
+
+static int mhi_debugfs_regdump_open(struct inode *inode, struct file *fp)
+{
+ return single_open(fp, mhi_debugfs_regdump_show, inode->i_private);
+}
+
+static int mhi_debugfs_device_wake_open(struct inode *inode, struct file *fp)
+{
+ return single_open(fp, mhi_debugfs_device_wake_show, inode->i_private);
+}
+
+static int mhi_debugfs_timeout_ms_open(struct inode *inode, struct file *fp)
+{
+ return single_open(fp, mhi_debugfs_timeout_ms_show, inode->i_private);
+}
+
+static const struct file_operations debugfs_states_fops = {
+ .open = mhi_debugfs_states_open,
+ .release = single_release,
+ .read = seq_read,
+};
+
+static const struct file_operations debugfs_events_fops = {
+ .open = mhi_debugfs_events_open,
+ .release = single_release,
+ .read = seq_read,
+};
+
+static const struct file_operations debugfs_channels_fops = {
+ .open = mhi_debugfs_channels_open,
+ .release = single_release,
+ .read = seq_read,
+};
+
+static const struct file_operations debugfs_devices_fops = {
+ .open = mhi_debugfs_devices_open,
+ .release = single_release,
+ .read = seq_read,
+};
+
+static const struct file_operations debugfs_regdump_fops = {
+ .open = mhi_debugfs_regdump_open,
+ .release = single_release,
+ .read = seq_read,
+};
+
+static const struct file_operations debugfs_device_wake_fops = {
+ .open = mhi_debugfs_device_wake_open,
+ .write = mhi_debugfs_device_wake_write,
+ .release = single_release,
+ .read = seq_read,
+};
+
+static const struct file_operations debugfs_timeout_ms_fops = {
+ .open = mhi_debugfs_timeout_ms_open,
+ .write = mhi_debugfs_timeout_ms_write,
+ .release = single_release,
+ .read = seq_read,
+};
+
+static struct dentry *mhi_debugfs_root;
+
+void mhi_create_debugfs(struct mhi_controller *mhi_cntrl)
+{
+ mhi_cntrl->debugfs_dentry =
+ debugfs_create_dir(dev_name(mhi_cntrl->cntrl_dev),
+ mhi_debugfs_root);
+
+ debugfs_create_file("states", 0444, mhi_cntrl->debugfs_dentry,
+ mhi_cntrl, &debugfs_states_fops);
+ debugfs_create_file("events", 0444, mhi_cntrl->debugfs_dentry,
+ mhi_cntrl, &debugfs_events_fops);
+ debugfs_create_file("channels", 0444, mhi_cntrl->debugfs_dentry,
+ mhi_cntrl, &debugfs_channels_fops);
+ debugfs_create_file("devices", 0444, mhi_cntrl->debugfs_dentry,
+ mhi_cntrl, &debugfs_devices_fops);
+ debugfs_create_file("regdump", 0444, mhi_cntrl->debugfs_dentry,
+ mhi_cntrl, &debugfs_regdump_fops);
+ debugfs_create_file("device_wake", 0644, mhi_cntrl->debugfs_dentry,
+ mhi_cntrl, &debugfs_device_wake_fops);
+ debugfs_create_file("timeout_ms", 0644, mhi_cntrl->debugfs_dentry,
+ mhi_cntrl, &debugfs_timeout_ms_fops);
+}
+
+void mhi_destroy_debugfs(struct mhi_controller *mhi_cntrl)
+{
+ debugfs_remove_recursive(mhi_cntrl->debugfs_dentry);
+ mhi_cntrl->debugfs_dentry = NULL;
+}
+
+void mhi_debugfs_init(void)
+{
+ mhi_debugfs_root = debugfs_create_dir(mhi_bus_type.name, NULL);
+}
+
+void mhi_debugfs_exit(void)
+{
+ debugfs_remove_recursive(mhi_debugfs_root);
+}
diff --git a/drivers/bus/mhi/host/init.c b/drivers/bus/mhi/host/init.c
new file mode 100644
index 000000000000..2cc48f96afdb
--- /dev/null
+++ b/drivers/bus/mhi/host/init.c
@@ -0,0 +1,1387 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
+ *
+ */
+
+#include <linux/debugfs.h>
+#include <linux/device.h>
+#include <linux/dma-direction.h>
+#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/mhi.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/wait.h>
+#include "internal.h"
+
+const char * const mhi_ee_str[MHI_EE_MAX] = {
+ [MHI_EE_PBL] = "PBL",
+ [MHI_EE_SBL] = "SBL",
+ [MHI_EE_AMSS] = "AMSS",
+ [MHI_EE_RDDM] = "RDDM",
+ [MHI_EE_WFW] = "WFW",
+ [MHI_EE_PTHRU] = "PASS THRU",
+ [MHI_EE_EDL] = "EDL",
+ [MHI_EE_DISABLE_TRANSITION] = "DISABLE",
+ [MHI_EE_NOT_SUPPORTED] = "NOT SUPPORTED",
+};
+
+const char * const dev_state_tran_str[DEV_ST_TRANSITION_MAX] = {
+ [DEV_ST_TRANSITION_PBL] = "PBL",
+ [DEV_ST_TRANSITION_READY] = "READY",
+ [DEV_ST_TRANSITION_SBL] = "SBL",
+ [DEV_ST_TRANSITION_MISSION_MODE] = "MISSION_MODE",
+ [DEV_ST_TRANSITION_SYS_ERR] = "SYS_ERR",
+ [DEV_ST_TRANSITION_DISABLE] = "DISABLE",
+};
+
+const char * const mhi_state_str[MHI_STATE_MAX] = {
+ [MHI_STATE_RESET] = "RESET",
+ [MHI_STATE_READY] = "READY",
+ [MHI_STATE_M0] = "M0",
+ [MHI_STATE_M1] = "M1",
+ [MHI_STATE_M2] = "M2",
+ [MHI_STATE_M3] = "M3",
+ [MHI_STATE_M3_FAST] = "M3_FAST",
+ [MHI_STATE_BHI] = "BHI",
+ [MHI_STATE_SYS_ERR] = "SYS_ERR",
+};
+
+static const char * const mhi_pm_state_str[] = {
+ [MHI_PM_STATE_DISABLE] = "DISABLE",
+ [MHI_PM_STATE_POR] = "POR",
+ [MHI_PM_STATE_M0] = "M0",
+ [MHI_PM_STATE_M2] = "M2",
+ [MHI_PM_STATE_M3_ENTER] = "M?->M3",
+ [MHI_PM_STATE_M3] = "M3",
+ [MHI_PM_STATE_M3_EXIT] = "M3->M0",
+ [MHI_PM_STATE_FW_DL_ERR] = "FW DL Error",
+ [MHI_PM_STATE_SYS_ERR_DETECT] = "SYS_ERR Detect",
+ [MHI_PM_STATE_SYS_ERR_PROCESS] = "SYS_ERR Process",
+ [MHI_PM_STATE_SHUTDOWN_PROCESS] = "SHUTDOWN Process",
+ [MHI_PM_STATE_LD_ERR_FATAL_DETECT] = "LD or Error Fatal Detect",
+};
+
+const char *to_mhi_pm_state_str(enum mhi_pm_state state)
+{
+ int index = find_last_bit((unsigned long *)&state, 32);
+
+ if (index >= ARRAY_SIZE(mhi_pm_state_str))
+ return "Invalid State";
+
+ return mhi_pm_state_str[index];
+}
+
+static ssize_t serial_number_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct mhi_device *mhi_dev = to_mhi_device(dev);
+ struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
+
+ return snprintf(buf, PAGE_SIZE, "Serial Number: %u\n",
+ mhi_cntrl->serial_number);
+}
+static DEVICE_ATTR_RO(serial_number);
+
+static ssize_t oem_pk_hash_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct mhi_device *mhi_dev = to_mhi_device(dev);
+ struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
+ int i, cnt = 0;
+
+ for (i = 0; i < ARRAY_SIZE(mhi_cntrl->oem_pk_hash); i++)
+ cnt += snprintf(buf + cnt, PAGE_SIZE - cnt,
+ "OEMPKHASH[%d]: 0x%x\n", i,
+ mhi_cntrl->oem_pk_hash[i]);
+
+ return cnt;
+}
+static DEVICE_ATTR_RO(oem_pk_hash);
+
+static struct attribute *mhi_dev_attrs[] = {
+ &dev_attr_serial_number.attr,
+ &dev_attr_oem_pk_hash.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(mhi_dev);
+
+/* MHI protocol requires the transfer ring to be aligned with ring length */
+static int mhi_alloc_aligned_ring(struct mhi_controller *mhi_cntrl,
+ struct mhi_ring *ring,
+ u64 len)
+{
+ ring->alloc_size = len + (len - 1);
+ ring->pre_aligned = mhi_alloc_coherent(mhi_cntrl, ring->alloc_size,
+ &ring->dma_handle, GFP_KERNEL);
+ if (!ring->pre_aligned)
+ return -ENOMEM;
+
+ ring->iommu_base = (ring->dma_handle + (len - 1)) & ~(len - 1);
+ ring->base = ring->pre_aligned + (ring->iommu_base - ring->dma_handle);
+
+ return 0;
+}
+
+void mhi_deinit_free_irq(struct mhi_controller *mhi_cntrl)
+{
+ int i;
+ struct mhi_event *mhi_event = mhi_cntrl->mhi_event;
+
+ for (i = 0; i < mhi_cntrl->total_ev_rings; i++, mhi_event++) {
+ if (mhi_event->offload_ev)
+ continue;
+
+ free_irq(mhi_cntrl->irq[mhi_event->irq], mhi_event);
+ }
+
+ free_irq(mhi_cntrl->irq[0], mhi_cntrl);
+}
+
+int mhi_init_irq_setup(struct mhi_controller *mhi_cntrl)
+{
+ struct mhi_event *mhi_event = mhi_cntrl->mhi_event;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ int i, ret;
+
+ /* Setup BHI_INTVEC IRQ */
+ ret = request_threaded_irq(mhi_cntrl->irq[0], mhi_intvec_handler,
+ mhi_intvec_threaded_handler,
+ IRQF_SHARED | IRQF_NO_SUSPEND,
+ "bhi", mhi_cntrl);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < mhi_cntrl->total_ev_rings; i++, mhi_event++) {
+ if (mhi_event->offload_ev)
+ continue;
+
+ if (mhi_event->irq >= mhi_cntrl->nr_irqs) {
+ dev_err(dev, "irq %d not available for event ring\n",
+ mhi_event->irq);
+ ret = -EINVAL;
+ goto error_request;
+ }
+
+ ret = request_irq(mhi_cntrl->irq[mhi_event->irq],
+ mhi_irq_handler,
+ IRQF_SHARED | IRQF_NO_SUSPEND,
+ "mhi", mhi_event);
+ if (ret) {
+ dev_err(dev, "Error requesting irq:%d for ev:%d\n",
+ mhi_cntrl->irq[mhi_event->irq], i);
+ goto error_request;
+ }
+ }
+
+ return 0;
+
+error_request:
+ for (--i, --mhi_event; i >= 0; i--, mhi_event--) {
+ if (mhi_event->offload_ev)
+ continue;
+
+ free_irq(mhi_cntrl->irq[mhi_event->irq], mhi_event);
+ }
+ free_irq(mhi_cntrl->irq[0], mhi_cntrl);
+
+ return ret;
+}
+
+void mhi_deinit_dev_ctxt(struct mhi_controller *mhi_cntrl)
+{
+ int i;
+ struct mhi_ctxt *mhi_ctxt = mhi_cntrl->mhi_ctxt;
+ struct mhi_cmd *mhi_cmd;
+ struct mhi_event *mhi_event;
+ struct mhi_ring *ring;
+
+ mhi_cmd = mhi_cntrl->mhi_cmd;
+ for (i = 0; i < NR_OF_CMD_RINGS; i++, mhi_cmd++) {
+ ring = &mhi_cmd->ring;
+ mhi_free_coherent(mhi_cntrl, ring->alloc_size,
+ ring->pre_aligned, ring->dma_handle);
+ ring->base = NULL;
+ ring->iommu_base = 0;
+ }
+
+ mhi_free_coherent(mhi_cntrl,
+ sizeof(*mhi_ctxt->cmd_ctxt) * NR_OF_CMD_RINGS,
+ mhi_ctxt->cmd_ctxt, mhi_ctxt->cmd_ctxt_addr);
+
+ mhi_event = mhi_cntrl->mhi_event;
+ for (i = 0; i < mhi_cntrl->total_ev_rings; i++, mhi_event++) {
+ if (mhi_event->offload_ev)
+ continue;
+
+ ring = &mhi_event->ring;
+ mhi_free_coherent(mhi_cntrl, ring->alloc_size,
+ ring->pre_aligned, ring->dma_handle);
+ ring->base = NULL;
+ ring->iommu_base = 0;
+ }
+
+ mhi_free_coherent(mhi_cntrl, sizeof(*mhi_ctxt->er_ctxt) *
+ mhi_cntrl->total_ev_rings, mhi_ctxt->er_ctxt,
+ mhi_ctxt->er_ctxt_addr);
+
+ mhi_free_coherent(mhi_cntrl, sizeof(*mhi_ctxt->chan_ctxt) *
+ mhi_cntrl->max_chan, mhi_ctxt->chan_ctxt,
+ mhi_ctxt->chan_ctxt_addr);
+
+ kfree(mhi_ctxt);
+ mhi_cntrl->mhi_ctxt = NULL;
+}
+
+int mhi_init_dev_ctxt(struct mhi_controller *mhi_cntrl)
+{
+ struct mhi_ctxt *mhi_ctxt;
+ struct mhi_chan_ctxt *chan_ctxt;
+ struct mhi_event_ctxt *er_ctxt;
+ struct mhi_cmd_ctxt *cmd_ctxt;
+ struct mhi_chan *mhi_chan;
+ struct mhi_event *mhi_event;
+ struct mhi_cmd *mhi_cmd;
+ u32 tmp;
+ int ret = -ENOMEM, i;
+
+ atomic_set(&mhi_cntrl->dev_wake, 0);
+ atomic_set(&mhi_cntrl->pending_pkts, 0);
+
+ mhi_ctxt = kzalloc(sizeof(*mhi_ctxt), GFP_KERNEL);
+ if (!mhi_ctxt)
+ return -ENOMEM;
+
+ /* Setup channel ctxt */
+ mhi_ctxt->chan_ctxt = mhi_alloc_coherent(mhi_cntrl,
+ sizeof(*mhi_ctxt->chan_ctxt) *
+ mhi_cntrl->max_chan,
+ &mhi_ctxt->chan_ctxt_addr,
+ GFP_KERNEL);
+ if (!mhi_ctxt->chan_ctxt)
+ goto error_alloc_chan_ctxt;
+
+ mhi_chan = mhi_cntrl->mhi_chan;
+ chan_ctxt = mhi_ctxt->chan_ctxt;
+ for (i = 0; i < mhi_cntrl->max_chan; i++, chan_ctxt++, mhi_chan++) {
+ /* Skip if it is an offload channel */
+ if (mhi_chan->offload_ch)
+ continue;
+
+ tmp = chan_ctxt->chcfg;
+ tmp &= ~CHAN_CTX_CHSTATE_MASK;
+ tmp |= (MHI_CH_STATE_DISABLED << CHAN_CTX_CHSTATE_SHIFT);
+ tmp &= ~CHAN_CTX_BRSTMODE_MASK;
+ tmp |= (mhi_chan->db_cfg.brstmode << CHAN_CTX_BRSTMODE_SHIFT);
+ tmp &= ~CHAN_CTX_POLLCFG_MASK;
+ tmp |= (mhi_chan->db_cfg.pollcfg << CHAN_CTX_POLLCFG_SHIFT);
+ chan_ctxt->chcfg = tmp;
+
+ chan_ctxt->chtype = mhi_chan->type;
+ chan_ctxt->erindex = mhi_chan->er_index;
+
+ mhi_chan->ch_state = MHI_CH_STATE_DISABLED;
+ mhi_chan->tre_ring.db_addr = (void __iomem *)&chan_ctxt->wp;
+ }
+
+ /* Setup event context */
+ mhi_ctxt->er_ctxt = mhi_alloc_coherent(mhi_cntrl,
+ sizeof(*mhi_ctxt->er_ctxt) *
+ mhi_cntrl->total_ev_rings,
+ &mhi_ctxt->er_ctxt_addr,
+ GFP_KERNEL);
+ if (!mhi_ctxt->er_ctxt)
+ goto error_alloc_er_ctxt;
+
+ er_ctxt = mhi_ctxt->er_ctxt;
+ mhi_event = mhi_cntrl->mhi_event;
+ for (i = 0; i < mhi_cntrl->total_ev_rings; i++, er_ctxt++,
+ mhi_event++) {
+ struct mhi_ring *ring = &mhi_event->ring;
+
+ /* Skip if it is an offload event */
+ if (mhi_event->offload_ev)
+ continue;
+
+ tmp = er_ctxt->intmod;
+ tmp &= ~EV_CTX_INTMODC_MASK;
+ tmp &= ~EV_CTX_INTMODT_MASK;
+ tmp |= (mhi_event->intmod << EV_CTX_INTMODT_SHIFT);
+ er_ctxt->intmod = tmp;
+
+ er_ctxt->ertype = MHI_ER_TYPE_VALID;
+ er_ctxt->msivec = mhi_event->irq;
+ mhi_event->db_cfg.db_mode = true;
+
+ ring->el_size = sizeof(struct mhi_tre);
+ ring->len = ring->el_size * ring->elements;
+ ret = mhi_alloc_aligned_ring(mhi_cntrl, ring, ring->len);
+ if (ret)
+ goto error_alloc_er;
+
+ /*
+ * If the read pointer equals to the write pointer, then the
+ * ring is empty
+ */
+ ring->rp = ring->wp = ring->base;
+ er_ctxt->rbase = ring->iommu_base;
+ er_ctxt->rp = er_ctxt->wp = er_ctxt->rbase;
+ er_ctxt->rlen = ring->len;
+ ring->ctxt_wp = &er_ctxt->wp;
+ }
+
+ /* Setup cmd context */
+ ret = -ENOMEM;
+ mhi_ctxt->cmd_ctxt = mhi_alloc_coherent(mhi_cntrl,
+ sizeof(*mhi_ctxt->cmd_ctxt) *
+ NR_OF_CMD_RINGS,
+ &mhi_ctxt->cmd_ctxt_addr,
+ GFP_KERNEL);
+ if (!mhi_ctxt->cmd_ctxt)
+ goto error_alloc_er;
+
+ mhi_cmd = mhi_cntrl->mhi_cmd;
+ cmd_ctxt = mhi_ctxt->cmd_ctxt;
+ for (i = 0; i < NR_OF_CMD_RINGS; i++, mhi_cmd++, cmd_ctxt++) {
+ struct mhi_ring *ring = &mhi_cmd->ring;
+
+ ring->el_size = sizeof(struct mhi_tre);
+ ring->elements = CMD_EL_PER_RING;
+ ring->len = ring->el_size * ring->elements;
+ ret = mhi_alloc_aligned_ring(mhi_cntrl, ring, ring->len);
+ if (ret)
+ goto error_alloc_cmd;
+
+ ring->rp = ring->wp = ring->base;
+ cmd_ctxt->rbase = ring->iommu_base;
+ cmd_ctxt->rp = cmd_ctxt->wp = cmd_ctxt->rbase;
+ cmd_ctxt->rlen = ring->len;
+ ring->ctxt_wp = &cmd_ctxt->wp;
+ }
+
+ mhi_cntrl->mhi_ctxt = mhi_ctxt;
+
+ return 0;
+
+error_alloc_cmd:
+ for (--i, --mhi_cmd; i >= 0; i--, mhi_cmd--) {
+ struct mhi_ring *ring = &mhi_cmd->ring;
+
+ mhi_free_coherent(mhi_cntrl, ring->alloc_size,
+ ring->pre_aligned, ring->dma_handle);
+ }
+ mhi_free_coherent(mhi_cntrl,
+ sizeof(*mhi_ctxt->cmd_ctxt) * NR_OF_CMD_RINGS,
+ mhi_ctxt->cmd_ctxt, mhi_ctxt->cmd_ctxt_addr);
+ i = mhi_cntrl->total_ev_rings;
+ mhi_event = mhi_cntrl->mhi_event + i;
+
+error_alloc_er:
+ for (--i, --mhi_event; i >= 0; i--, mhi_event--) {
+ struct mhi_ring *ring = &mhi_event->ring;
+
+ if (mhi_event->offload_ev)
+ continue;
+
+ mhi_free_coherent(mhi_cntrl, ring->alloc_size,
+ ring->pre_aligned, ring->dma_handle);
+ }
+ mhi_free_coherent(mhi_cntrl, sizeof(*mhi_ctxt->er_ctxt) *
+ mhi_cntrl->total_ev_rings, mhi_ctxt->er_ctxt,
+ mhi_ctxt->er_ctxt_addr);
+
+error_alloc_er_ctxt:
+ mhi_free_coherent(mhi_cntrl, sizeof(*mhi_ctxt->chan_ctxt) *
+ mhi_cntrl->max_chan, mhi_ctxt->chan_ctxt,
+ mhi_ctxt->chan_ctxt_addr);
+
+error_alloc_chan_ctxt:
+ kfree(mhi_ctxt);
+
+ return ret;
+}
+
+int mhi_init_mmio(struct mhi_controller *mhi_cntrl)
+{
+ u32 val;
+ int i, ret;
+ struct mhi_chan *mhi_chan;
+ struct mhi_event *mhi_event;
+ void __iomem *base = mhi_cntrl->regs;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ struct {
+ u32 offset;
+ u32 mask;
+ u32 shift;
+ u32 val;
+ } reg_info[] = {
+ {
+ CCABAP_HIGHER, U32_MAX, 0,
+ upper_32_bits(mhi_cntrl->mhi_ctxt->chan_ctxt_addr),
+ },
+ {
+ CCABAP_LOWER, U32_MAX, 0,
+ lower_32_bits(mhi_cntrl->mhi_ctxt->chan_ctxt_addr),
+ },
+ {
+ ECABAP_HIGHER, U32_MAX, 0,
+ upper_32_bits(mhi_cntrl->mhi_ctxt->er_ctxt_addr),
+ },
+ {
+ ECABAP_LOWER, U32_MAX, 0,
+ lower_32_bits(mhi_cntrl->mhi_ctxt->er_ctxt_addr),
+ },
+ {
+ CRCBAP_HIGHER, U32_MAX, 0,
+ upper_32_bits(mhi_cntrl->mhi_ctxt->cmd_ctxt_addr),
+ },
+ {
+ CRCBAP_LOWER, U32_MAX, 0,
+ lower_32_bits(mhi_cntrl->mhi_ctxt->cmd_ctxt_addr),
+ },
+ {
+ MHICFG, MHICFG_NER_MASK, MHICFG_NER_SHIFT,
+ mhi_cntrl->total_ev_rings,
+ },
+ {
+ MHICFG, MHICFG_NHWER_MASK, MHICFG_NHWER_SHIFT,
+ mhi_cntrl->hw_ev_rings,
+ },
+ {
+ MHICTRLBASE_HIGHER, U32_MAX, 0,
+ upper_32_bits(mhi_cntrl->iova_start),
+ },
+ {
+ MHICTRLBASE_LOWER, U32_MAX, 0,
+ lower_32_bits(mhi_cntrl->iova_start),
+ },
+ {
+ MHIDATABASE_HIGHER, U32_MAX, 0,
+ upper_32_bits(mhi_cntrl->iova_start),
+ },
+ {
+ MHIDATABASE_LOWER, U32_MAX, 0,
+ lower_32_bits(mhi_cntrl->iova_start),
+ },
+ {
+ MHICTRLLIMIT_HIGHER, U32_MAX, 0,
+ upper_32_bits(mhi_cntrl->iova_stop),
+ },
+ {
+ MHICTRLLIMIT_LOWER, U32_MAX, 0,
+ lower_32_bits(mhi_cntrl->iova_stop),
+ },
+ {
+ MHIDATALIMIT_HIGHER, U32_MAX, 0,
+ upper_32_bits(mhi_cntrl->iova_stop),
+ },
+ {
+ MHIDATALIMIT_LOWER, U32_MAX, 0,
+ lower_32_bits(mhi_cntrl->iova_stop),
+ },
+ { 0, 0, 0 }
+ };
+
+ dev_dbg(dev, "Initializing MHI registers\n");
+
+ /* Read channel db offset */
+ ret = mhi_read_reg_field(mhi_cntrl, base, CHDBOFF, CHDBOFF_CHDBOFF_MASK,
+ CHDBOFF_CHDBOFF_SHIFT, &val);
+ if (ret) {
+ dev_err(dev, "Unable to read CHDBOFF register\n");
+ return -EIO;
+ }
+
+ if (val >= mhi_cntrl->reg_len - (8 * MHI_DEV_WAKE_DB)) {
+ dev_err(dev, "CHDB offset: 0x%x is out of range: 0x%zx\n",
+ val, mhi_cntrl->reg_len - (8 * MHI_DEV_WAKE_DB));
+ return -ERANGE;
+ }
+
+ /* Setup wake db */
+ mhi_cntrl->wake_db = base + val + (8 * MHI_DEV_WAKE_DB);
+ mhi_write_reg(mhi_cntrl, mhi_cntrl->wake_db, 4, 0);
+ mhi_write_reg(mhi_cntrl, mhi_cntrl->wake_db, 0, 0);
+ mhi_cntrl->wake_set = false;
+
+ /* Setup channel db address for each channel in tre_ring */
+ mhi_chan = mhi_cntrl->mhi_chan;
+ for (i = 0; i < mhi_cntrl->max_chan; i++, val += 8, mhi_chan++)
+ mhi_chan->tre_ring.db_addr = base + val;
+
+ /* Read event ring db offset */
+ ret = mhi_read_reg_field(mhi_cntrl, base, ERDBOFF, ERDBOFF_ERDBOFF_MASK,
+ ERDBOFF_ERDBOFF_SHIFT, &val);
+ if (ret) {
+ dev_err(dev, "Unable to read ERDBOFF register\n");
+ return -EIO;
+ }
+
+ if (val >= mhi_cntrl->reg_len - (8 * mhi_cntrl->total_ev_rings)) {
+ dev_err(dev, "ERDB offset: 0x%x is out of range: 0x%zx\n",
+ val, mhi_cntrl->reg_len - (8 * mhi_cntrl->total_ev_rings));
+ return -ERANGE;
+ }
+
+ /* Setup event db address for each ev_ring */
+ mhi_event = mhi_cntrl->mhi_event;
+ for (i = 0; i < mhi_cntrl->total_ev_rings; i++, val += 8, mhi_event++) {
+ if (mhi_event->offload_ev)
+ continue;
+
+ mhi_event->ring.db_addr = base + val;
+ }
+
+ /* Setup DB register for primary CMD rings */
+ mhi_cntrl->mhi_cmd[PRIMARY_CMD_RING].ring.db_addr = base + CRDB_LOWER;
+
+ /* Write to MMIO registers */
+ for (i = 0; reg_info[i].offset; i++)
+ mhi_write_reg_field(mhi_cntrl, base, reg_info[i].offset,
+ reg_info[i].mask, reg_info[i].shift,
+ reg_info[i].val);
+
+ return 0;
+}
+
+void mhi_deinit_chan_ctxt(struct mhi_controller *mhi_cntrl,
+ struct mhi_chan *mhi_chan)
+{
+ struct mhi_ring *buf_ring;
+ struct mhi_ring *tre_ring;
+ struct mhi_chan_ctxt *chan_ctxt;
+ u32 tmp;
+
+ buf_ring = &mhi_chan->buf_ring;
+ tre_ring = &mhi_chan->tre_ring;
+ chan_ctxt = &mhi_cntrl->mhi_ctxt->chan_ctxt[mhi_chan->chan];
+
+ mhi_free_coherent(mhi_cntrl, tre_ring->alloc_size,
+ tre_ring->pre_aligned, tre_ring->dma_handle);
+ vfree(buf_ring->base);
+
+ buf_ring->base = tre_ring->base = NULL;
+ tre_ring->ctxt_wp = NULL;
+ chan_ctxt->rbase = 0;
+ chan_ctxt->rlen = 0;
+ chan_ctxt->rp = 0;
+ chan_ctxt->wp = 0;
+
+ tmp = chan_ctxt->chcfg;
+ tmp &= ~CHAN_CTX_CHSTATE_MASK;
+ tmp |= (MHI_CH_STATE_DISABLED << CHAN_CTX_CHSTATE_SHIFT);
+ chan_ctxt->chcfg = tmp;
+
+ /* Update to all cores */
+ smp_wmb();
+}
+
+int mhi_init_chan_ctxt(struct mhi_controller *mhi_cntrl,
+ struct mhi_chan *mhi_chan)
+{
+ struct mhi_ring *buf_ring;
+ struct mhi_ring *tre_ring;
+ struct mhi_chan_ctxt *chan_ctxt;
+ u32 tmp;
+ int ret;
+
+ buf_ring = &mhi_chan->buf_ring;
+ tre_ring = &mhi_chan->tre_ring;
+ tre_ring->el_size = sizeof(struct mhi_tre);
+ tre_ring->len = tre_ring->el_size * tre_ring->elements;
+ chan_ctxt = &mhi_cntrl->mhi_ctxt->chan_ctxt[mhi_chan->chan];
+ ret = mhi_alloc_aligned_ring(mhi_cntrl, tre_ring, tre_ring->len);
+ if (ret)
+ return -ENOMEM;
+
+ buf_ring->el_size = sizeof(struct mhi_buf_info);
+ buf_ring->len = buf_ring->el_size * buf_ring->elements;
+ buf_ring->base = vzalloc(buf_ring->len);
+
+ if (!buf_ring->base) {
+ mhi_free_coherent(mhi_cntrl, tre_ring->alloc_size,
+ tre_ring->pre_aligned, tre_ring->dma_handle);
+ return -ENOMEM;
+ }
+
+ tmp = chan_ctxt->chcfg;
+ tmp &= ~CHAN_CTX_CHSTATE_MASK;
+ tmp |= (MHI_CH_STATE_ENABLED << CHAN_CTX_CHSTATE_SHIFT);
+ chan_ctxt->chcfg = tmp;
+
+ chan_ctxt->rbase = tre_ring->iommu_base;
+ chan_ctxt->rp = chan_ctxt->wp = chan_ctxt->rbase;
+ chan_ctxt->rlen = tre_ring->len;
+ tre_ring->ctxt_wp = &chan_ctxt->wp;
+
+ tre_ring->rp = tre_ring->wp = tre_ring->base;
+ buf_ring->rp = buf_ring->wp = buf_ring->base;
+ mhi_chan->db_cfg.db_mode = 1;
+
+ /* Update to all cores */
+ smp_wmb();
+
+ return 0;
+}
+
+static int parse_ev_cfg(struct mhi_controller *mhi_cntrl,
+ const struct mhi_controller_config *config)
+{
+ struct mhi_event *mhi_event;
+ const struct mhi_event_config *event_cfg;
+ struct device *dev = mhi_cntrl->cntrl_dev;
+ int i, num;
+
+ num = config->num_events;
+ mhi_cntrl->total_ev_rings = num;
+ mhi_cntrl->mhi_event = kcalloc(num, sizeof(*mhi_cntrl->mhi_event),
+ GFP_KERNEL);
+ if (!mhi_cntrl->mhi_event)
+ return -ENOMEM;
+
+ /* Populate event ring */
+ mhi_event = mhi_cntrl->mhi_event;
+ for (i = 0; i < num; i++) {
+ event_cfg = &config->event_cfg[i];
+
+ mhi_event->er_index = i;
+ mhi_event->ring.elements = event_cfg->num_elements;
+ mhi_event->intmod = event_cfg->irq_moderation_ms;
+ mhi_event->irq = event_cfg->irq;
+
+ if (event_cfg->channel != U32_MAX) {
+ /* This event ring has a dedicated channel */
+ mhi_event->chan = event_cfg->channel;
+ if (mhi_event->chan >= mhi_cntrl->max_chan) {
+ dev_err(dev,
+ "Event Ring channel not available\n");
+ goto error_ev_cfg;
+ }
+
+ mhi_event->mhi_chan =
+ &mhi_cntrl->mhi_chan[mhi_event->chan];
+ }
+
+ /* Priority is fixed to 1 for now */
+ mhi_event->priority = 1;
+
+ mhi_event->db_cfg.brstmode = event_cfg->mode;
+ if (MHI_INVALID_BRSTMODE(mhi_event->db_cfg.brstmode))
+ goto error_ev_cfg;
+
+ if (mhi_event->db_cfg.brstmode == MHI_DB_BRST_ENABLE)
+ mhi_event->db_cfg.process_db = mhi_db_brstmode;
+ else
+ mhi_event->db_cfg.process_db = mhi_db_brstmode_disable;
+
+ mhi_event->data_type = event_cfg->data_type;
+
+ switch (mhi_event->data_type) {
+ case MHI_ER_DATA:
+ mhi_event->process_event = mhi_process_data_event_ring;
+ break;
+ case MHI_ER_CTRL:
+ mhi_event->process_event = mhi_process_ctrl_ev_ring;
+ break;
+ default:
+ dev_err(dev, "Event Ring type not supported\n");
+ goto error_ev_cfg;
+ }
+
+ mhi_event->hw_ring = event_cfg->hardware_event;
+ if (mhi_event->hw_ring)
+ mhi_cntrl->hw_ev_rings++;
+ else
+ mhi_cntrl->sw_ev_rings++;
+
+ mhi_event->cl_manage = event_cfg->client_managed;
+ mhi_event->offload_ev = event_cfg->offload_channel;
+ mhi_event++;
+ }
+
+ return 0;
+
+error_ev_cfg:
+
+ kfree(mhi_cntrl->mhi_event);
+ return -EINVAL;
+}
+
+static int parse_ch_cfg(struct mhi_controller *mhi_cntrl,
+ const struct mhi_controller_config *config)
+{
+ const struct mhi_channel_config *ch_cfg;
+ struct device *dev = mhi_cntrl->cntrl_dev;
+ int i;
+ u32 chan;
+
+ mhi_cntrl->max_chan = config->max_channels;
+
+ /*
+ * The allocation of MHI channels can exceed 32KB in some scenarios,
+ * so to avoid any memory possible allocation failures, vzalloc is
+ * used here
+ */
+ mhi_cntrl->mhi_chan = vzalloc(mhi_cntrl->max_chan *
+ sizeof(*mhi_cntrl->mhi_chan));
+ if (!mhi_cntrl->mhi_chan)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&mhi_cntrl->lpm_chans);
+
+ /* Populate channel configurations */
+ for (i = 0; i < config->num_channels; i++) {
+ struct mhi_chan *mhi_chan;
+
+ ch_cfg = &config->ch_cfg[i];
+
+ chan = ch_cfg->num;
+ if (chan >= mhi_cntrl->max_chan) {
+ dev_err(dev, "Channel %d not available\n", chan);
+ goto error_chan_cfg;
+ }
+
+ mhi_chan = &mhi_cntrl->mhi_chan[chan];
+ mhi_chan->name = ch_cfg->name;
+ mhi_chan->chan = chan;
+
+ mhi_chan->tre_ring.elements = ch_cfg->num_elements;
+ if (!mhi_chan->tre_ring.elements)
+ goto error_chan_cfg;
+
+ /*
+ * For some channels, local ring length should be bigger than
+ * the transfer ring length due to internal logical channels
+ * in device. So host can queue much more buffers than transfer
+ * ring length. Example, RSC channels should have a larger local
+ * channel length than transfer ring length.
+ */
+ mhi_chan->buf_ring.elements = ch_cfg->local_elements;
+ if (!mhi_chan->buf_ring.elements)
+ mhi_chan->buf_ring.elements = mhi_chan->tre_ring.elements;
+ mhi_chan->er_index = ch_cfg->event_ring;
+ mhi_chan->dir = ch_cfg->dir;
+
+ /*
+ * For most channels, chtype is identical to channel directions.
+ * So, if it is not defined then assign channel direction to
+ * chtype
+ */
+ mhi_chan->type = ch_cfg->type;
+ if (!mhi_chan->type)
+ mhi_chan->type = (enum mhi_ch_type)mhi_chan->dir;
+
+ mhi_chan->ee_mask = ch_cfg->ee_mask;
+ mhi_chan->db_cfg.pollcfg = ch_cfg->pollcfg;
+ mhi_chan->lpm_notify = ch_cfg->lpm_notify;
+ mhi_chan->offload_ch = ch_cfg->offload_channel;
+ mhi_chan->db_cfg.reset_req = ch_cfg->doorbell_mode_switch;
+ mhi_chan->pre_alloc = ch_cfg->auto_queue;
+ mhi_chan->auto_start = ch_cfg->auto_start;
+
+ /*
+ * If MHI host allocates buffers, then the channel direction
+ * should be DMA_FROM_DEVICE
+ */
+ if (mhi_chan->pre_alloc && mhi_chan->dir != DMA_FROM_DEVICE) {
+ dev_err(dev, "Invalid channel configuration\n");
+ goto error_chan_cfg;
+ }
+
+ /*
+ * Bi-directional and direction less channel must be an
+ * offload channel
+ */
+ if ((mhi_chan->dir == DMA_BIDIRECTIONAL ||
+ mhi_chan->dir == DMA_NONE) && !mhi_chan->offload_ch) {
+ dev_err(dev, "Invalid channel configuration\n");
+ goto error_chan_cfg;
+ }
+
+ if (!mhi_chan->offload_ch) {
+ mhi_chan->db_cfg.brstmode = ch_cfg->doorbell;
+ if (MHI_INVALID_BRSTMODE(mhi_chan->db_cfg.brstmode)) {
+ dev_err(dev, "Invalid Door bell mode\n");
+ goto error_chan_cfg;
+ }
+ }
+
+ if (mhi_chan->db_cfg.brstmode == MHI_DB_BRST_ENABLE)
+ mhi_chan->db_cfg.process_db = mhi_db_brstmode;
+ else
+ mhi_chan->db_cfg.process_db = mhi_db_brstmode_disable;
+
+ mhi_chan->configured = true;
+
+ if (mhi_chan->lpm_notify)
+ list_add_tail(&mhi_chan->node, &mhi_cntrl->lpm_chans);
+ }
+
+ return 0;
+
+error_chan_cfg:
+ vfree(mhi_cntrl->mhi_chan);
+
+ return -EINVAL;
+}
+
+static int parse_config(struct mhi_controller *mhi_cntrl,
+ const struct mhi_controller_config *config)
+{
+ int ret;
+
+ /* Parse MHI channel configuration */
+ ret = parse_ch_cfg(mhi_cntrl, config);
+ if (ret)
+ return ret;
+
+ /* Parse MHI event configuration */
+ ret = parse_ev_cfg(mhi_cntrl, config);
+ if (ret)
+ goto error_ev_cfg;
+
+ mhi_cntrl->timeout_ms = config->timeout_ms;
+ if (!mhi_cntrl->timeout_ms)
+ mhi_cntrl->timeout_ms = MHI_TIMEOUT_MS;
+
+ mhi_cntrl->bounce_buf = config->use_bounce_buf;
+ mhi_cntrl->buffer_len = config->buf_len;
+ if (!mhi_cntrl->buffer_len)
+ mhi_cntrl->buffer_len = MHI_MAX_MTU;
+
+ /* By default, host is allowed to ring DB in both M0 and M2 states */
+ mhi_cntrl->db_access = MHI_PM_M0 | MHI_PM_M2;
+ if (config->m2_no_db)
+ mhi_cntrl->db_access &= ~MHI_PM_M2;
+
+ return 0;
+
+error_ev_cfg:
+ vfree(mhi_cntrl->mhi_chan);
+
+ return ret;
+}
+
+int mhi_register_controller(struct mhi_controller *mhi_cntrl,
+ const struct mhi_controller_config *config)
+{
+ struct mhi_event *mhi_event;
+ struct mhi_chan *mhi_chan;
+ struct mhi_cmd *mhi_cmd;
+ struct mhi_device *mhi_dev;
+ u32 soc_info;
+ int ret, i;
+
+ if (!mhi_cntrl)
+ return -EINVAL;
+
+ if (!mhi_cntrl->runtime_get || !mhi_cntrl->runtime_put ||
+ !mhi_cntrl->status_cb || !mhi_cntrl->read_reg ||
+ !mhi_cntrl->write_reg)
+ return -EINVAL;
+
+ ret = parse_config(mhi_cntrl, config);
+ if (ret)
+ return -EINVAL;
+
+ mhi_cntrl->mhi_cmd = kcalloc(NR_OF_CMD_RINGS,
+ sizeof(*mhi_cntrl->mhi_cmd), GFP_KERNEL);
+ if (!mhi_cntrl->mhi_cmd) {
+ ret = -ENOMEM;
+ goto error_alloc_cmd;
+ }
+
+ INIT_LIST_HEAD(&mhi_cntrl->transition_list);
+ mutex_init(&mhi_cntrl->pm_mutex);
+ rwlock_init(&mhi_cntrl->pm_lock);
+ spin_lock_init(&mhi_cntrl->transition_lock);
+ spin_lock_init(&mhi_cntrl->wlock);
+ INIT_WORK(&mhi_cntrl->st_worker, mhi_pm_st_worker);
+ init_waitqueue_head(&mhi_cntrl->state_event);
+
+ mhi_cmd = mhi_cntrl->mhi_cmd;
+ for (i = 0; i < NR_OF_CMD_RINGS; i++, mhi_cmd++)
+ spin_lock_init(&mhi_cmd->lock);
+
+ mhi_event = mhi_cntrl->mhi_event;
+ for (i = 0; i < mhi_cntrl->total_ev_rings; i++, mhi_event++) {
+ /* Skip for offload events */
+ if (mhi_event->offload_ev)
+ continue;
+
+ mhi_event->mhi_cntrl = mhi_cntrl;
+ spin_lock_init(&mhi_event->lock);
+ if (mhi_event->data_type == MHI_ER_CTRL)
+ tasklet_init(&mhi_event->task, mhi_ctrl_ev_task,
+ (ulong)mhi_event);
+ else
+ tasklet_init(&mhi_event->task, mhi_ev_task,
+ (ulong)mhi_event);
+ }
+
+ mhi_chan = mhi_cntrl->mhi_chan;
+ for (i = 0; i < mhi_cntrl->max_chan; i++, mhi_chan++) {
+ mutex_init(&mhi_chan->mutex);
+ init_completion(&mhi_chan->completion);
+ rwlock_init(&mhi_chan->lock);
+
+ /* used in setting bei field of TRE */
+ mhi_event = &mhi_cntrl->mhi_event[mhi_chan->er_index];
+ mhi_chan->intmod = mhi_event->intmod;
+ }
+
+ if (mhi_cntrl->bounce_buf) {
+ mhi_cntrl->map_single = mhi_map_single_use_bb;
+ mhi_cntrl->unmap_single = mhi_unmap_single_use_bb;
+ } else {
+ mhi_cntrl->map_single = mhi_map_single_no_bb;
+ mhi_cntrl->unmap_single = mhi_unmap_single_no_bb;
+ }
+
+ /* Read the MHI device info */
+ ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->regs,
+ SOC_HW_VERSION_OFFS, &soc_info);
+ if (ret)
+ goto error_alloc_dev;
+
+ mhi_cntrl->family_number = (soc_info & SOC_HW_VERSION_FAM_NUM_BMSK) >>
+ SOC_HW_VERSION_FAM_NUM_SHFT;
+ mhi_cntrl->device_number = (soc_info & SOC_HW_VERSION_DEV_NUM_BMSK) >>
+ SOC_HW_VERSION_DEV_NUM_SHFT;
+ mhi_cntrl->major_version = (soc_info & SOC_HW_VERSION_MAJOR_VER_BMSK) >>
+ SOC_HW_VERSION_MAJOR_VER_SHFT;
+ mhi_cntrl->minor_version = (soc_info & SOC_HW_VERSION_MINOR_VER_BMSK) >>
+ SOC_HW_VERSION_MINOR_VER_SHFT;
+
+ /* Register controller with MHI bus */
+ mhi_dev = mhi_alloc_device(mhi_cntrl);
+ if (IS_ERR(mhi_dev)) {
+ dev_err(mhi_cntrl->cntrl_dev, "Failed to allocate MHI device\n");
+ ret = PTR_ERR(mhi_dev);
+ goto error_alloc_dev;
+ }
+
+ mhi_dev->dev_type = MHI_DEVICE_CONTROLLER;
+ mhi_dev->mhi_cntrl = mhi_cntrl;
+ dev_set_name(&mhi_dev->dev, "%s", dev_name(mhi_cntrl->cntrl_dev));
+ mhi_dev->name = dev_name(mhi_cntrl->cntrl_dev);
+
+ /* Init wakeup source */
+ device_init_wakeup(&mhi_dev->dev, true);
+
+ ret = device_add(&mhi_dev->dev);
+ if (ret)
+ goto error_add_dev;
+
+ mhi_cntrl->mhi_dev = mhi_dev;
+
+ mhi_create_debugfs(mhi_cntrl);
+
+ return 0;
+
+error_add_dev:
+ put_device(&mhi_dev->dev);
+
+error_alloc_dev:
+ kfree(mhi_cntrl->mhi_cmd);
+
+error_alloc_cmd:
+ vfree(mhi_cntrl->mhi_chan);
+ kfree(mhi_cntrl->mhi_event);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(mhi_register_controller);
+
+void mhi_unregister_controller(struct mhi_controller *mhi_cntrl)
+{
+ struct mhi_device *mhi_dev = mhi_cntrl->mhi_dev;
+ struct mhi_chan *mhi_chan = mhi_cntrl->mhi_chan;
+ unsigned int i;
+
+ mhi_destroy_debugfs(mhi_cntrl);
+
+ kfree(mhi_cntrl->mhi_cmd);
+ kfree(mhi_cntrl->mhi_event);
+
+ /* Drop the references to MHI devices created for channels */
+ for (i = 0; i < mhi_cntrl->max_chan; i++, mhi_chan++) {
+ if (!mhi_chan->mhi_dev)
+ continue;
+
+ put_device(&mhi_chan->mhi_dev->dev);
+ }
+ vfree(mhi_cntrl->mhi_chan);
+
+ device_del(&mhi_dev->dev);
+ put_device(&mhi_dev->dev);
+}
+EXPORT_SYMBOL_GPL(mhi_unregister_controller);
+
+struct mhi_controller *mhi_alloc_controller(void)
+{
+ struct mhi_controller *mhi_cntrl;
+
+ mhi_cntrl = kzalloc(sizeof(*mhi_cntrl), GFP_KERNEL);
+
+ return mhi_cntrl;
+}
+EXPORT_SYMBOL_GPL(mhi_alloc_controller);
+
+void mhi_free_controller(struct mhi_controller *mhi_cntrl)
+{
+ kfree(mhi_cntrl);
+}
+EXPORT_SYMBOL_GPL(mhi_free_controller);
+
+int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl)
+{
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ u32 bhie_off;
+ int ret;
+
+ mutex_lock(&mhi_cntrl->pm_mutex);
+
+ ret = mhi_init_dev_ctxt(mhi_cntrl);
+ if (ret)
+ goto error_dev_ctxt;
+
+ /*
+ * Allocate RDDM table if specified, this table is for debugging purpose
+ */
+ if (mhi_cntrl->rddm_size) {
+ mhi_alloc_bhie_table(mhi_cntrl, &mhi_cntrl->rddm_image,
+ mhi_cntrl->rddm_size);
+
+ /*
+ * This controller supports RDDM, so we need to manually clear
+ * BHIE RX registers since POR values are undefined.
+ */
+ ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->regs, BHIEOFF,
+ &bhie_off);
+ if (ret) {
+ dev_err(dev, "Error getting BHIE offset\n");
+ goto bhie_error;
+ }
+
+ mhi_cntrl->bhie = mhi_cntrl->regs + bhie_off;
+ memset_io(mhi_cntrl->bhie + BHIE_RXVECADDR_LOW_OFFS,
+ 0, BHIE_RXVECSTATUS_OFFS - BHIE_RXVECADDR_LOW_OFFS +
+ 4);
+
+ if (mhi_cntrl->rddm_image)
+ mhi_rddm_prepare(mhi_cntrl, mhi_cntrl->rddm_image);
+ }
+
+ mhi_cntrl->pre_init = true;
+
+ mutex_unlock(&mhi_cntrl->pm_mutex);
+
+ return 0;
+
+bhie_error:
+ if (mhi_cntrl->rddm_image) {
+ mhi_free_bhie_table(mhi_cntrl, mhi_cntrl->rddm_image);
+ mhi_cntrl->rddm_image = NULL;
+ }
+
+error_dev_ctxt:
+ mutex_unlock(&mhi_cntrl->pm_mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(mhi_prepare_for_power_up);
+
+void mhi_unprepare_after_power_down(struct mhi_controller *mhi_cntrl)
+{
+ if (mhi_cntrl->fbc_image) {
+ mhi_free_bhie_table(mhi_cntrl, mhi_cntrl->fbc_image);
+ mhi_cntrl->fbc_image = NULL;
+ }
+
+ if (mhi_cntrl->rddm_image) {
+ mhi_free_bhie_table(mhi_cntrl, mhi_cntrl->rddm_image);
+ mhi_cntrl->rddm_image = NULL;
+ }
+
+ mhi_deinit_dev_ctxt(mhi_cntrl);
+ mhi_cntrl->pre_init = false;
+}
+EXPORT_SYMBOL_GPL(mhi_unprepare_after_power_down);
+
+static void mhi_release_device(struct device *dev)
+{
+ struct mhi_device *mhi_dev = to_mhi_device(dev);
+
+ /*
+ * We need to set the mhi_chan->mhi_dev to NULL here since the MHI
+ * devices for the channels will only get created if the mhi_dev
+ * associated with it is NULL. This scenario will happen during the
+ * controller suspend and resume.
+ */
+ if (mhi_dev->ul_chan)
+ mhi_dev->ul_chan->mhi_dev = NULL;
+
+ if (mhi_dev->dl_chan)
+ mhi_dev->dl_chan->mhi_dev = NULL;
+
+ kfree(mhi_dev);
+}
+
+struct mhi_device *mhi_alloc_device(struct mhi_controller *mhi_cntrl)
+{
+ struct mhi_device *mhi_dev;
+ struct device *dev;
+
+ mhi_dev = kzalloc(sizeof(*mhi_dev), GFP_KERNEL);
+ if (!mhi_dev)
+ return ERR_PTR(-ENOMEM);
+
+ dev = &mhi_dev->dev;
+ device_initialize(dev);
+ dev->bus = &mhi_bus_type;
+ dev->release = mhi_release_device;
+ dev->parent = mhi_cntrl->cntrl_dev;
+ mhi_dev->mhi_cntrl = mhi_cntrl;
+ mhi_dev->dev_wake = 0;
+
+ return mhi_dev;
+}
+
+static int mhi_driver_probe(struct device *dev)
+{
+ struct mhi_device *mhi_dev = to_mhi_device(dev);
+ struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
+ struct device_driver *drv = dev->driver;
+ struct mhi_driver *mhi_drv = to_mhi_driver(drv);
+ struct mhi_event *mhi_event;
+ struct mhi_chan *ul_chan = mhi_dev->ul_chan;
+ struct mhi_chan *dl_chan = mhi_dev->dl_chan;
+ int ret;
+
+ /* Bring device out of LPM */
+ ret = mhi_device_get_sync(mhi_dev);
+ if (ret)
+ return ret;
+
+ ret = -EINVAL;
+
+ if (ul_chan) {
+ /*
+ * If channel supports LPM notifications then status_cb should
+ * be provided
+ */
+ if (ul_chan->lpm_notify && !mhi_drv->status_cb)
+ goto exit_probe;
+
+ /* For non-offload channels then xfer_cb should be provided */
+ if (!ul_chan->offload_ch && !mhi_drv->ul_xfer_cb)
+ goto exit_probe;
+
+ ul_chan->xfer_cb = mhi_drv->ul_xfer_cb;
+ if (ul_chan->auto_start) {
+ ret = mhi_prepare_channel(mhi_cntrl, ul_chan);
+ if (ret)
+ goto exit_probe;
+ }
+ }
+
+ ret = -EINVAL;
+ if (dl_chan) {
+ /*
+ * If channel supports LPM notifications then status_cb should
+ * be provided
+ */
+ if (dl_chan->lpm_notify && !mhi_drv->status_cb)
+ goto exit_probe;
+
+ /* For non-offload channels then xfer_cb should be provided */
+ if (!dl_chan->offload_ch && !mhi_drv->dl_xfer_cb)
+ goto exit_probe;
+
+ mhi_event = &mhi_cntrl->mhi_event[dl_chan->er_index];
+
+ /*
+ * If the channel event ring is managed by client, then
+ * status_cb must be provided so that the framework can
+ * notify pending data
+ */
+ if (mhi_event->cl_manage && !mhi_drv->status_cb)
+ goto exit_probe;
+
+ dl_chan->xfer_cb = mhi_drv->dl_xfer_cb;
+ }
+
+ /* Call the user provided probe function */
+ ret = mhi_drv->probe(mhi_dev, mhi_dev->id);
+ if (ret)
+ goto exit_probe;
+
+ if (dl_chan && dl_chan->auto_start)
+ mhi_prepare_channel(mhi_cntrl, dl_chan);
+
+ mhi_device_put(mhi_dev);
+
+ return ret;
+
+exit_probe:
+ mhi_unprepare_from_transfer(mhi_dev);
+
+ mhi_device_put(mhi_dev);
+
+ return ret;
+}
+
+static int mhi_driver_remove(struct device *dev)
+{
+ struct mhi_device *mhi_dev = to_mhi_device(dev);
+ struct mhi_driver *mhi_drv = to_mhi_driver(dev->driver);
+ struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
+ struct mhi_chan *mhi_chan;
+ enum mhi_ch_state ch_state[] = {
+ MHI_CH_STATE_DISABLED,
+ MHI_CH_STATE_DISABLED
+ };
+ int dir;
+
+ /* Skip if it is a controller device */
+ if (mhi_dev->dev_type == MHI_DEVICE_CONTROLLER)
+ return 0;
+
+ /* Reset both channels */
+ for (dir = 0; dir < 2; dir++) {
+ mhi_chan = dir ? mhi_dev->ul_chan : mhi_dev->dl_chan;
+
+ if (!mhi_chan)
+ continue;
+
+ /* Wake all threads waiting for completion */
+ write_lock_irq(&mhi_chan->lock);
+ mhi_chan->ccs = MHI_EV_CC_INVALID;
+ complete_all(&mhi_chan->completion);
+ write_unlock_irq(&mhi_chan->lock);
+
+ /* Set the channel state to disabled */
+ mutex_lock(&mhi_chan->mutex);
+ write_lock_irq(&mhi_chan->lock);
+ ch_state[dir] = mhi_chan->ch_state;
+ mhi_chan->ch_state = MHI_CH_STATE_SUSPENDED;
+ write_unlock_irq(&mhi_chan->lock);
+
+ /* Reset the non-offload channel */
+ if (!mhi_chan->offload_ch)
+ mhi_reset_chan(mhi_cntrl, mhi_chan);
+
+ mutex_unlock(&mhi_chan->mutex);
+ }
+
+ mhi_drv->remove(mhi_dev);
+
+ /* De-init channel if it was enabled */
+ for (dir = 0; dir < 2; dir++) {
+ mhi_chan = dir ? mhi_dev->ul_chan : mhi_dev->dl_chan;
+
+ if (!mhi_chan)
+ continue;
+
+ mutex_lock(&mhi_chan->mutex);
+
+ if ((ch_state[dir] == MHI_CH_STATE_ENABLED ||
+ ch_state[dir] == MHI_CH_STATE_STOP) &&
+ !mhi_chan->offload_ch)
+ mhi_deinit_chan_ctxt(mhi_cntrl, mhi_chan);
+
+ mhi_chan->ch_state = MHI_CH_STATE_DISABLED;
+
+ mutex_unlock(&mhi_chan->mutex);
+ }
+
+ while (mhi_dev->dev_wake)
+ mhi_device_put(mhi_dev);
+
+ return 0;
+}
+
+int __mhi_driver_register(struct mhi_driver *mhi_drv, struct module *owner)
+{
+ struct device_driver *driver = &mhi_drv->driver;
+
+ if (!mhi_drv->probe || !mhi_drv->remove)
+ return -EINVAL;
+
+ driver->bus = &mhi_bus_type;
+ driver->owner = owner;
+ driver->probe = mhi_driver_probe;
+ driver->remove = mhi_driver_remove;
+
+ return driver_register(driver);
+}
+EXPORT_SYMBOL_GPL(__mhi_driver_register);
+
+void mhi_driver_unregister(struct mhi_driver *mhi_drv)
+{
+ driver_unregister(&mhi_drv->driver);
+}
+EXPORT_SYMBOL_GPL(mhi_driver_unregister);
+
+static int mhi_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ struct mhi_device *mhi_dev = to_mhi_device(dev);
+
+ return add_uevent_var(env, "MODALIAS=" MHI_DEVICE_MODALIAS_FMT,
+ mhi_dev->name);
+}
+
+static int mhi_match(struct device *dev, struct device_driver *drv)
+{
+ struct mhi_device *mhi_dev = to_mhi_device(dev);
+ struct mhi_driver *mhi_drv = to_mhi_driver(drv);
+ const struct mhi_device_id *id;
+
+ /*
+ * If the device is a controller type then there is no client driver
+ * associated with it
+ */
+ if (mhi_dev->dev_type == MHI_DEVICE_CONTROLLER)
+ return 0;
+
+ for (id = mhi_drv->id_table; id->chan[0]; id++)
+ if (!strcmp(mhi_dev->name, id->chan)) {
+ mhi_dev->id = id;
+ return 1;
+ }
+
+ return 0;
+};
+
+struct bus_type mhi_bus_type = {
+ .name = "mhi",
+ .dev_name = "mhi",
+ .match = mhi_match,
+ .uevent = mhi_uevent,
+ .dev_groups = mhi_dev_groups,
+};
+
+static int __init mhi_init(void)
+{
+ mhi_debugfs_init();
+ return bus_register(&mhi_bus_type);
+}
+
+static void __exit mhi_exit(void)
+{
+ mhi_debugfs_exit();
+ bus_unregister(&mhi_bus_type);
+}
+
+postcore_initcall(mhi_init);
+module_exit(mhi_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MHI Host Interface");
diff --git a/drivers/bus/mhi/host/internal.h b/drivers/bus/mhi/host/internal.h
new file mode 100644
index 000000000000..7989269ddd96
--- /dev/null
+++ b/drivers/bus/mhi/host/internal.h
@@ -0,0 +1,722 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
+ *
+ */
+
+#ifndef _MHI_INT_H
+#define _MHI_INT_H
+
+#include <linux/mhi.h>
+
+extern struct bus_type mhi_bus_type;
+
+#define MHIREGLEN (0x0)
+#define MHIREGLEN_MHIREGLEN_MASK (0xFFFFFFFF)
+#define MHIREGLEN_MHIREGLEN_SHIFT (0)
+
+#define MHIVER (0x8)
+#define MHIVER_MHIVER_MASK (0xFFFFFFFF)
+#define MHIVER_MHIVER_SHIFT (0)
+
+#define MHICFG (0x10)
+#define MHICFG_NHWER_MASK (0xFF000000)
+#define MHICFG_NHWER_SHIFT (24)
+#define MHICFG_NER_MASK (0xFF0000)
+#define MHICFG_NER_SHIFT (16)
+#define MHICFG_NHWCH_MASK (0xFF00)
+#define MHICFG_NHWCH_SHIFT (8)
+#define MHICFG_NCH_MASK (0xFF)
+#define MHICFG_NCH_SHIFT (0)
+
+#define CHDBOFF (0x18)
+#define CHDBOFF_CHDBOFF_MASK (0xFFFFFFFF)
+#define CHDBOFF_CHDBOFF_SHIFT (0)
+
+#define ERDBOFF (0x20)
+#define ERDBOFF_ERDBOFF_MASK (0xFFFFFFFF)
+#define ERDBOFF_ERDBOFF_SHIFT (0)
+
+#define BHIOFF (0x28)
+#define BHIOFF_BHIOFF_MASK (0xFFFFFFFF)
+#define BHIOFF_BHIOFF_SHIFT (0)
+
+#define BHIEOFF (0x2C)
+#define BHIEOFF_BHIEOFF_MASK (0xFFFFFFFF)
+#define BHIEOFF_BHIEOFF_SHIFT (0)
+
+#define DEBUGOFF (0x30)
+#define DEBUGOFF_DEBUGOFF_MASK (0xFFFFFFFF)
+#define DEBUGOFF_DEBUGOFF_SHIFT (0)
+
+#define MHICTRL (0x38)
+#define MHICTRL_MHISTATE_MASK (0x0000FF00)
+#define MHICTRL_MHISTATE_SHIFT (8)
+#define MHICTRL_RESET_MASK (0x2)
+#define MHICTRL_RESET_SHIFT (1)
+
+#define MHISTATUS (0x48)
+#define MHISTATUS_MHISTATE_MASK (0x0000FF00)
+#define MHISTATUS_MHISTATE_SHIFT (8)
+#define MHISTATUS_SYSERR_MASK (0x4)
+#define MHISTATUS_SYSERR_SHIFT (2)
+#define MHISTATUS_READY_MASK (0x1)
+#define MHISTATUS_READY_SHIFT (0)
+
+#define CCABAP_LOWER (0x58)
+#define CCABAP_LOWER_CCABAP_LOWER_MASK (0xFFFFFFFF)
+#define CCABAP_LOWER_CCABAP_LOWER_SHIFT (0)
+
+#define CCABAP_HIGHER (0x5C)
+#define CCABAP_HIGHER_CCABAP_HIGHER_MASK (0xFFFFFFFF)
+#define CCABAP_HIGHER_CCABAP_HIGHER_SHIFT (0)
+
+#define ECABAP_LOWER (0x60)
+#define ECABAP_LOWER_ECABAP_LOWER_MASK (0xFFFFFFFF)
+#define ECABAP_LOWER_ECABAP_LOWER_SHIFT (0)
+
+#define ECABAP_HIGHER (0x64)
+#define ECABAP_HIGHER_ECABAP_HIGHER_MASK (0xFFFFFFFF)
+#define ECABAP_HIGHER_ECABAP_HIGHER_SHIFT (0)
+
+#define CRCBAP_LOWER (0x68)
+#define CRCBAP_LOWER_CRCBAP_LOWER_MASK (0xFFFFFFFF)
+#define CRCBAP_LOWER_CRCBAP_LOWER_SHIFT (0)
+
+#define CRCBAP_HIGHER (0x6C)
+#define CRCBAP_HIGHER_CRCBAP_HIGHER_MASK (0xFFFFFFFF)
+#define CRCBAP_HIGHER_CRCBAP_HIGHER_SHIFT (0)
+
+#define CRDB_LOWER (0x70)
+#define CRDB_LOWER_CRDB_LOWER_MASK (0xFFFFFFFF)
+#define CRDB_LOWER_CRDB_LOWER_SHIFT (0)
+
+#define CRDB_HIGHER (0x74)
+#define CRDB_HIGHER_CRDB_HIGHER_MASK (0xFFFFFFFF)
+#define CRDB_HIGHER_CRDB_HIGHER_SHIFT (0)
+
+#define MHICTRLBASE_LOWER (0x80)
+#define MHICTRLBASE_LOWER_MHICTRLBASE_LOWER_MASK (0xFFFFFFFF)
+#define MHICTRLBASE_LOWER_MHICTRLBASE_LOWER_SHIFT (0)
+
+#define MHICTRLBASE_HIGHER (0x84)
+#define MHICTRLBASE_HIGHER_MHICTRLBASE_HIGHER_MASK (0xFFFFFFFF)
+#define MHICTRLBASE_HIGHER_MHICTRLBASE_HIGHER_SHIFT (0)
+
+#define MHICTRLLIMIT_LOWER (0x88)
+#define MHICTRLLIMIT_LOWER_MHICTRLLIMIT_LOWER_MASK (0xFFFFFFFF)
+#define MHICTRLLIMIT_LOWER_MHICTRLLIMIT_LOWER_SHIFT (0)
+
+#define MHICTRLLIMIT_HIGHER (0x8C)
+#define MHICTRLLIMIT_HIGHER_MHICTRLLIMIT_HIGHER_MASK (0xFFFFFFFF)
+#define MHICTRLLIMIT_HIGHER_MHICTRLLIMIT_HIGHER_SHIFT (0)
+
+#define MHIDATABASE_LOWER (0x98)
+#define MHIDATABASE_LOWER_MHIDATABASE_LOWER_MASK (0xFFFFFFFF)
+#define MHIDATABASE_LOWER_MHIDATABASE_LOWER_SHIFT (0)
+
+#define MHIDATABASE_HIGHER (0x9C)
+#define MHIDATABASE_HIGHER_MHIDATABASE_HIGHER_MASK (0xFFFFFFFF)
+#define MHIDATABASE_HIGHER_MHIDATABASE_HIGHER_SHIFT (0)
+
+#define MHIDATALIMIT_LOWER (0xA0)
+#define MHIDATALIMIT_LOWER_MHIDATALIMIT_LOWER_MASK (0xFFFFFFFF)
+#define MHIDATALIMIT_LOWER_MHIDATALIMIT_LOWER_SHIFT (0)
+
+#define MHIDATALIMIT_HIGHER (0xA4)
+#define MHIDATALIMIT_HIGHER_MHIDATALIMIT_HIGHER_MASK (0xFFFFFFFF)
+#define MHIDATALIMIT_HIGHER_MHIDATALIMIT_HIGHER_SHIFT (0)
+
+/* Host request register */
+#define MHI_SOC_RESET_REQ_OFFSET (0xB0)
+#define MHI_SOC_RESET_REQ BIT(0)
+
+/* MHI BHI offfsets */
+#define BHI_BHIVERSION_MINOR (0x00)
+#define BHI_BHIVERSION_MAJOR (0x04)
+#define BHI_IMGADDR_LOW (0x08)
+#define BHI_IMGADDR_HIGH (0x0C)
+#define BHI_IMGSIZE (0x10)
+#define BHI_RSVD1 (0x14)
+#define BHI_IMGTXDB (0x18)
+#define BHI_TXDB_SEQNUM_BMSK (0x3FFFFFFF)
+#define BHI_TXDB_SEQNUM_SHFT (0)
+#define BHI_RSVD2 (0x1C)
+#define BHI_INTVEC (0x20)
+#define BHI_RSVD3 (0x24)
+#define BHI_EXECENV (0x28)
+#define BHI_STATUS (0x2C)
+#define BHI_ERRCODE (0x30)
+#define BHI_ERRDBG1 (0x34)
+#define BHI_ERRDBG2 (0x38)
+#define BHI_ERRDBG3 (0x3C)
+#define BHI_SERIALNU (0x40)
+#define BHI_SBLANTIROLLVER (0x44)
+#define BHI_NUMSEG (0x48)
+#define BHI_MSMHWID(n) (0x4C + (0x4 * n))
+#define BHI_OEMPKHASH(n) (0x64 + (0x4 * n))
+#define BHI_RSVD5 (0xC4)
+#define BHI_STATUS_MASK (0xC0000000)
+#define BHI_STATUS_SHIFT (30)
+#define BHI_STATUS_ERROR (3)
+#define BHI_STATUS_SUCCESS (2)
+#define BHI_STATUS_RESET (0)
+
+/* MHI BHIE offsets */
+#define BHIE_MSMSOCID_OFFS (0x0000)
+#define BHIE_TXVECADDR_LOW_OFFS (0x002C)
+#define BHIE_TXVECADDR_HIGH_OFFS (0x0030)
+#define BHIE_TXVECSIZE_OFFS (0x0034)
+#define BHIE_TXVECDB_OFFS (0x003C)
+#define BHIE_TXVECDB_SEQNUM_BMSK (0x3FFFFFFF)
+#define BHIE_TXVECDB_SEQNUM_SHFT (0)
+#define BHIE_TXVECSTATUS_OFFS (0x0044)
+#define BHIE_TXVECSTATUS_SEQNUM_BMSK (0x3FFFFFFF)
+#define BHIE_TXVECSTATUS_SEQNUM_SHFT (0)
+#define BHIE_TXVECSTATUS_STATUS_BMSK (0xC0000000)
+#define BHIE_TXVECSTATUS_STATUS_SHFT (30)
+#define BHIE_TXVECSTATUS_STATUS_RESET (0x00)
+#define BHIE_TXVECSTATUS_STATUS_XFER_COMPL (0x02)
+#define BHIE_TXVECSTATUS_STATUS_ERROR (0x03)
+#define BHIE_RXVECADDR_LOW_OFFS (0x0060)
+#define BHIE_RXVECADDR_HIGH_OFFS (0x0064)
+#define BHIE_RXVECSIZE_OFFS (0x0068)
+#define BHIE_RXVECDB_OFFS (0x0070)
+#define BHIE_RXVECDB_SEQNUM_BMSK (0x3FFFFFFF)
+#define BHIE_RXVECDB_SEQNUM_SHFT (0)
+#define BHIE_RXVECSTATUS_OFFS (0x0078)
+#define BHIE_RXVECSTATUS_SEQNUM_BMSK (0x3FFFFFFF)
+#define BHIE_RXVECSTATUS_SEQNUM_SHFT (0)
+#define BHIE_RXVECSTATUS_STATUS_BMSK (0xC0000000)
+#define BHIE_RXVECSTATUS_STATUS_SHFT (30)
+#define BHIE_RXVECSTATUS_STATUS_RESET (0x00)
+#define BHIE_RXVECSTATUS_STATUS_XFER_COMPL (0x02)
+#define BHIE_RXVECSTATUS_STATUS_ERROR (0x03)
+
+#define SOC_HW_VERSION_OFFS (0x224)
+#define SOC_HW_VERSION_FAM_NUM_BMSK (0xF0000000)
+#define SOC_HW_VERSION_FAM_NUM_SHFT (28)
+#define SOC_HW_VERSION_DEV_NUM_BMSK (0x0FFF0000)
+#define SOC_HW_VERSION_DEV_NUM_SHFT (16)
+#define SOC_HW_VERSION_MAJOR_VER_BMSK (0x0000FF00)
+#define SOC_HW_VERSION_MAJOR_VER_SHFT (8)
+#define SOC_HW_VERSION_MINOR_VER_BMSK (0x000000FF)
+#define SOC_HW_VERSION_MINOR_VER_SHFT (0)
+
+#define EV_CTX_RESERVED_MASK GENMASK(7, 0)
+#define EV_CTX_INTMODC_MASK GENMASK(15, 8)
+#define EV_CTX_INTMODC_SHIFT 8
+#define EV_CTX_INTMODT_MASK GENMASK(31, 16)
+#define EV_CTX_INTMODT_SHIFT 16
+struct mhi_event_ctxt {
+ __u32 intmod;
+ __u32 ertype;
+ __u32 msivec;
+
+ __u64 rbase __packed __aligned(4);
+ __u64 rlen __packed __aligned(4);
+ __u64 rp __packed __aligned(4);
+ __u64 wp __packed __aligned(4);
+};
+
+#define CHAN_CTX_CHSTATE_MASK GENMASK(7, 0)
+#define CHAN_CTX_CHSTATE_SHIFT 0
+#define CHAN_CTX_BRSTMODE_MASK GENMASK(9, 8)
+#define CHAN_CTX_BRSTMODE_SHIFT 8
+#define CHAN_CTX_POLLCFG_MASK GENMASK(15, 10)
+#define CHAN_CTX_POLLCFG_SHIFT 10
+#define CHAN_CTX_RESERVED_MASK GENMASK(31, 16)
+struct mhi_chan_ctxt {
+ __u32 chcfg;
+ __u32 chtype;
+ __u32 erindex;
+
+ __u64 rbase __packed __aligned(4);
+ __u64 rlen __packed __aligned(4);
+ __u64 rp __packed __aligned(4);
+ __u64 wp __packed __aligned(4);
+};
+
+struct mhi_cmd_ctxt {
+ __u32 reserved0;
+ __u32 reserved1;
+ __u32 reserved2;
+
+ __u64 rbase __packed __aligned(4);
+ __u64 rlen __packed __aligned(4);
+ __u64 rp __packed __aligned(4);
+ __u64 wp __packed __aligned(4);
+};
+
+struct mhi_ctxt {
+ struct mhi_event_ctxt *er_ctxt;
+ struct mhi_chan_ctxt *chan_ctxt;
+ struct mhi_cmd_ctxt *cmd_ctxt;
+ dma_addr_t er_ctxt_addr;
+ dma_addr_t chan_ctxt_addr;
+ dma_addr_t cmd_ctxt_addr;
+};
+
+struct mhi_tre {
+ u64 ptr;
+ u32 dword[2];
+};
+
+struct bhi_vec_entry {
+ u64 dma_addr;
+ u64 size;
+};
+
+enum mhi_cmd_type {
+ MHI_CMD_NOP = 1,
+ MHI_CMD_RESET_CHAN = 16,
+ MHI_CMD_STOP_CHAN = 17,
+ MHI_CMD_START_CHAN = 18,
+};
+
+/* No operation command */
+#define MHI_TRE_CMD_NOOP_PTR (0)
+#define MHI_TRE_CMD_NOOP_DWORD0 (0)
+#define MHI_TRE_CMD_NOOP_DWORD1 (MHI_CMD_NOP << 16)
+
+/* Channel reset command */
+#define MHI_TRE_CMD_RESET_PTR (0)
+#define MHI_TRE_CMD_RESET_DWORD0 (0)
+#define MHI_TRE_CMD_RESET_DWORD1(chid) ((chid << 24) | \
+ (MHI_CMD_RESET_CHAN << 16))
+
+/* Channel stop command */
+#define MHI_TRE_CMD_STOP_PTR (0)
+#define MHI_TRE_CMD_STOP_DWORD0 (0)
+#define MHI_TRE_CMD_STOP_DWORD1(chid) ((chid << 24) | \
+ (MHI_CMD_STOP_CHAN << 16))
+
+/* Channel start command */
+#define MHI_TRE_CMD_START_PTR (0)
+#define MHI_TRE_CMD_START_DWORD0 (0)
+#define MHI_TRE_CMD_START_DWORD1(chid) ((chid << 24) | \
+ (MHI_CMD_START_CHAN << 16))
+
+#define MHI_TRE_GET_CMD_CHID(tre) (((tre)->dword[1] >> 24) & 0xFF)
+#define MHI_TRE_GET_CMD_TYPE(tre) (((tre)->dword[1] >> 16) & 0xFF)
+
+/* Event descriptor macros */
+#define MHI_TRE_EV_PTR(ptr) (ptr)
+#define MHI_TRE_EV_DWORD0(code, len) ((code << 24) | len)
+#define MHI_TRE_EV_DWORD1(chid, type) ((chid << 24) | (type << 16))
+#define MHI_TRE_GET_EV_PTR(tre) ((tre)->ptr)
+#define MHI_TRE_GET_EV_CODE(tre) (((tre)->dword[0] >> 24) & 0xFF)
+#define MHI_TRE_GET_EV_LEN(tre) ((tre)->dword[0] & 0xFFFF)
+#define MHI_TRE_GET_EV_CHID(tre) (((tre)->dword[1] >> 24) & 0xFF)
+#define MHI_TRE_GET_EV_TYPE(tre) (((tre)->dword[1] >> 16) & 0xFF)
+#define MHI_TRE_GET_EV_STATE(tre) (((tre)->dword[0] >> 24) & 0xFF)
+#define MHI_TRE_GET_EV_EXECENV(tre) (((tre)->dword[0] >> 24) & 0xFF)
+#define MHI_TRE_GET_EV_SEQ(tre) ((tre)->dword[0])
+#define MHI_TRE_GET_EV_TIME(tre) ((tre)->ptr)
+#define MHI_TRE_GET_EV_COOKIE(tre) lower_32_bits((tre)->ptr)
+#define MHI_TRE_GET_EV_VEID(tre) (((tre)->dword[0] >> 16) & 0xFF)
+#define MHI_TRE_GET_EV_LINKSPEED(tre) (((tre)->dword[1] >> 24) & 0xFF)
+#define MHI_TRE_GET_EV_LINKWIDTH(tre) ((tre)->dword[0] & 0xFF)
+
+/* Transfer descriptor macros */
+#define MHI_TRE_DATA_PTR(ptr) (ptr)
+#define MHI_TRE_DATA_DWORD0(len) (len & MHI_MAX_MTU)
+#define MHI_TRE_DATA_DWORD1(bei, ieot, ieob, chain) ((2 << 16) | (bei << 10) \
+ | (ieot << 9) | (ieob << 8) | chain)
+
+/* RSC transfer descriptor macros */
+#define MHI_RSCTRE_DATA_PTR(ptr, len) (((u64)len << 48) | ptr)
+#define MHI_RSCTRE_DATA_DWORD0(cookie) (cookie)
+#define MHI_RSCTRE_DATA_DWORD1 (MHI_PKT_TYPE_COALESCING << 16)
+
+enum mhi_pkt_type {
+ MHI_PKT_TYPE_INVALID = 0x0,
+ MHI_PKT_TYPE_NOOP_CMD = 0x1,
+ MHI_PKT_TYPE_TRANSFER = 0x2,
+ MHI_PKT_TYPE_COALESCING = 0x8,
+ MHI_PKT_TYPE_RESET_CHAN_CMD = 0x10,
+ MHI_PKT_TYPE_STOP_CHAN_CMD = 0x11,
+ MHI_PKT_TYPE_START_CHAN_CMD = 0x12,
+ MHI_PKT_TYPE_STATE_CHANGE_EVENT = 0x20,
+ MHI_PKT_TYPE_CMD_COMPLETION_EVENT = 0x21,
+ MHI_PKT_TYPE_TX_EVENT = 0x22,
+ MHI_PKT_TYPE_RSC_TX_EVENT = 0x28,
+ MHI_PKT_TYPE_EE_EVENT = 0x40,
+ MHI_PKT_TYPE_TSYNC_EVENT = 0x48,
+ MHI_PKT_TYPE_BW_REQ_EVENT = 0x50,
+ MHI_PKT_TYPE_STALE_EVENT, /* internal event */
+};
+
+/* MHI transfer completion events */
+enum mhi_ev_ccs {
+ MHI_EV_CC_INVALID = 0x0,
+ MHI_EV_CC_SUCCESS = 0x1,
+ MHI_EV_CC_EOT = 0x2, /* End of transfer event */
+ MHI_EV_CC_OVERFLOW = 0x3,
+ MHI_EV_CC_EOB = 0x4, /* End of block event */
+ MHI_EV_CC_OOB = 0x5, /* Out of block event */
+ MHI_EV_CC_DB_MODE = 0x6,
+ MHI_EV_CC_UNDEFINED_ERR = 0x10,
+ MHI_EV_CC_BAD_TRE = 0x11,
+};
+
+enum mhi_ch_state {
+ MHI_CH_STATE_DISABLED = 0x0,
+ MHI_CH_STATE_ENABLED = 0x1,
+ MHI_CH_STATE_RUNNING = 0x2,
+ MHI_CH_STATE_SUSPENDED = 0x3,
+ MHI_CH_STATE_STOP = 0x4,
+ MHI_CH_STATE_ERROR = 0x5,
+};
+
+#define MHI_INVALID_BRSTMODE(mode) (mode != MHI_DB_BRST_DISABLE && \
+ mode != MHI_DB_BRST_ENABLE)
+
+extern const char * const mhi_ee_str[MHI_EE_MAX];
+#define TO_MHI_EXEC_STR(ee) (((ee) >= MHI_EE_MAX) ? \
+ "INVALID_EE" : mhi_ee_str[ee])
+
+#define MHI_IN_PBL(ee) (ee == MHI_EE_PBL || ee == MHI_EE_PTHRU || \
+ ee == MHI_EE_EDL)
+
+#define MHI_IN_MISSION_MODE(ee) (ee == MHI_EE_AMSS || ee == MHI_EE_WFW)
+
+enum dev_st_transition {
+ DEV_ST_TRANSITION_PBL,
+ DEV_ST_TRANSITION_READY,
+ DEV_ST_TRANSITION_SBL,
+ DEV_ST_TRANSITION_MISSION_MODE,
+ DEV_ST_TRANSITION_SYS_ERR,
+ DEV_ST_TRANSITION_DISABLE,
+ DEV_ST_TRANSITION_MAX,
+};
+
+extern const char * const dev_state_tran_str[DEV_ST_TRANSITION_MAX];
+#define TO_DEV_STATE_TRANS_STR(state) (((state) >= DEV_ST_TRANSITION_MAX) ? \
+ "INVALID_STATE" : dev_state_tran_str[state])
+
+extern const char * const mhi_state_str[MHI_STATE_MAX];
+#define TO_MHI_STATE_STR(state) ((state >= MHI_STATE_MAX || \
+ !mhi_state_str[state]) ? \
+ "INVALID_STATE" : mhi_state_str[state])
+
+/* internal power states */
+enum mhi_pm_state {
+ MHI_PM_STATE_DISABLE,
+ MHI_PM_STATE_POR,
+ MHI_PM_STATE_M0,
+ MHI_PM_STATE_M2,
+ MHI_PM_STATE_M3_ENTER,
+ MHI_PM_STATE_M3,
+ MHI_PM_STATE_M3_EXIT,
+ MHI_PM_STATE_FW_DL_ERR,
+ MHI_PM_STATE_SYS_ERR_DETECT,
+ MHI_PM_STATE_SYS_ERR_PROCESS,
+ MHI_PM_STATE_SHUTDOWN_PROCESS,
+ MHI_PM_STATE_LD_ERR_FATAL_DETECT,
+ MHI_PM_STATE_MAX
+};
+
+#define MHI_PM_DISABLE BIT(0)
+#define MHI_PM_POR BIT(1)
+#define MHI_PM_M0 BIT(2)
+#define MHI_PM_M2 BIT(3)
+#define MHI_PM_M3_ENTER BIT(4)
+#define MHI_PM_M3 BIT(5)
+#define MHI_PM_M3_EXIT BIT(6)
+/* firmware download failure state */
+#define MHI_PM_FW_DL_ERR BIT(7)
+#define MHI_PM_SYS_ERR_DETECT BIT(8)
+#define MHI_PM_SYS_ERR_PROCESS BIT(9)
+#define MHI_PM_SHUTDOWN_PROCESS BIT(10)
+/* link not accessible */
+#define MHI_PM_LD_ERR_FATAL_DETECT BIT(11)
+
+#define MHI_REG_ACCESS_VALID(pm_state) ((pm_state & (MHI_PM_POR | MHI_PM_M0 | \
+ MHI_PM_M2 | MHI_PM_M3_ENTER | MHI_PM_M3_EXIT | \
+ MHI_PM_SYS_ERR_DETECT | MHI_PM_SYS_ERR_PROCESS | \
+ MHI_PM_SHUTDOWN_PROCESS | MHI_PM_FW_DL_ERR)))
+#define MHI_PM_IN_ERROR_STATE(pm_state) (pm_state >= MHI_PM_FW_DL_ERR)
+#define MHI_PM_IN_FATAL_STATE(pm_state) (pm_state == MHI_PM_LD_ERR_FATAL_DETECT)
+#define MHI_DB_ACCESS_VALID(mhi_cntrl) (mhi_cntrl->pm_state & \
+ mhi_cntrl->db_access)
+#define MHI_WAKE_DB_CLEAR_VALID(pm_state) (pm_state & (MHI_PM_M0 | \
+ MHI_PM_M2 | MHI_PM_M3_EXIT))
+#define MHI_WAKE_DB_SET_VALID(pm_state) (pm_state & MHI_PM_M2)
+#define MHI_WAKE_DB_FORCE_SET_VALID(pm_state) MHI_WAKE_DB_CLEAR_VALID(pm_state)
+#define MHI_EVENT_ACCESS_INVALID(pm_state) (pm_state == MHI_PM_DISABLE || \
+ MHI_PM_IN_ERROR_STATE(pm_state))
+#define MHI_PM_IN_SUSPEND_STATE(pm_state) (pm_state & \
+ (MHI_PM_M3_ENTER | MHI_PM_M3))
+
+#define NR_OF_CMD_RINGS 1
+#define CMD_EL_PER_RING 128
+#define PRIMARY_CMD_RING 0
+#define MHI_DEV_WAKE_DB 127
+#define MHI_MAX_MTU 0xffff
+#define MHI_RANDOM_U32_NONZERO(bmsk) (prandom_u32_max(bmsk) + 1)
+
+enum mhi_er_type {
+ MHI_ER_TYPE_INVALID = 0x0,
+ MHI_ER_TYPE_VALID = 0x1,
+};
+
+struct db_cfg {
+ bool reset_req;
+ bool db_mode;
+ u32 pollcfg;
+ enum mhi_db_brst_mode brstmode;
+ dma_addr_t db_val;
+ void (*process_db)(struct mhi_controller *mhi_cntrl,
+ struct db_cfg *db_cfg, void __iomem *io_addr,
+ dma_addr_t db_val);
+};
+
+struct mhi_pm_transitions {
+ enum mhi_pm_state from_state;
+ u32 to_states;
+};
+
+struct state_transition {
+ struct list_head node;
+ enum dev_st_transition state;
+};
+
+struct mhi_ring {
+ dma_addr_t dma_handle;
+ dma_addr_t iommu_base;
+ u64 *ctxt_wp; /* point to ctxt wp */
+ void *pre_aligned;
+ void *base;
+ void *rp;
+ void *wp;
+ size_t el_size;
+ size_t len;
+ size_t elements;
+ size_t alloc_size;
+ void __iomem *db_addr;
+};
+
+struct mhi_cmd {
+ struct mhi_ring ring;
+ spinlock_t lock;
+};
+
+struct mhi_buf_info {
+ void *v_addr;
+ void *bb_addr;
+ void *wp;
+ void *cb_buf;
+ dma_addr_t p_addr;
+ size_t len;
+ enum dma_data_direction dir;
+ bool used; /* Indicates whether the buffer is used or not */
+ bool pre_mapped; /* Already pre-mapped by client */
+};
+
+struct mhi_event {
+ struct mhi_controller *mhi_cntrl;
+ struct mhi_chan *mhi_chan; /* dedicated to channel */
+ u32 er_index;
+ u32 intmod;
+ u32 irq;
+ int chan; /* this event ring is dedicated to a channel (optional) */
+ u32 priority;
+ enum mhi_er_data_type data_type;
+ struct mhi_ring ring;
+ struct db_cfg db_cfg;
+ struct tasklet_struct task;
+ spinlock_t lock;
+ int (*process_event)(struct mhi_controller *mhi_cntrl,
+ struct mhi_event *mhi_event,
+ u32 event_quota);
+ bool hw_ring;
+ bool cl_manage;
+ bool offload_ev; /* managed by a device driver */
+};
+
+struct mhi_chan {
+ const char *name;
+ /*
+ * Important: When consuming, increment tre_ring first and when
+ * releasing, decrement buf_ring first. If tre_ring has space, buf_ring
+ * is guranteed to have space so we do not need to check both rings.
+ */
+ struct mhi_ring buf_ring;
+ struct mhi_ring tre_ring;
+ u32 chan;
+ u32 er_index;
+ u32 intmod;
+ enum mhi_ch_type type;
+ enum dma_data_direction dir;
+ struct db_cfg db_cfg;
+ enum mhi_ch_ee_mask ee_mask;
+ enum mhi_ch_state ch_state;
+ enum mhi_ev_ccs ccs;
+ struct mhi_device *mhi_dev;
+ void (*xfer_cb)(struct mhi_device *mhi_dev, struct mhi_result *result);
+ struct mutex mutex;
+ struct completion completion;
+ rwlock_t lock;
+ struct list_head node;
+ bool lpm_notify;
+ bool configured;
+ bool offload_ch;
+ bool pre_alloc;
+ bool auto_start;
+ bool wake_capable;
+};
+
+/* Default MHI timeout */
+#define MHI_TIMEOUT_MS (1000)
+
+/* debugfs related functions */
+#ifdef CONFIG_MHI_BUS_DEBUG
+void mhi_create_debugfs(struct mhi_controller *mhi_cntrl);
+void mhi_destroy_debugfs(struct mhi_controller *mhi_cntrl);
+void mhi_debugfs_init(void);
+void mhi_debugfs_exit(void);
+#else
+static inline void mhi_create_debugfs(struct mhi_controller *mhi_cntrl)
+{
+}
+
+static inline void mhi_destroy_debugfs(struct mhi_controller *mhi_cntrl)
+{
+}
+
+static inline void mhi_debugfs_init(void)
+{
+}
+
+static inline void mhi_debugfs_exit(void)
+{
+}
+#endif
+
+struct mhi_device *mhi_alloc_device(struct mhi_controller *mhi_cntrl);
+
+int mhi_destroy_device(struct device *dev, void *data);
+void mhi_create_devices(struct mhi_controller *mhi_cntrl);
+
+int mhi_alloc_bhie_table(struct mhi_controller *mhi_cntrl,
+ struct image_info **image_info, size_t alloc_size);
+void mhi_free_bhie_table(struct mhi_controller *mhi_cntrl,
+ struct image_info *image_info);
+
+/* Power management APIs */
+enum mhi_pm_state __must_check mhi_tryset_pm_state(
+ struct mhi_controller *mhi_cntrl,
+ enum mhi_pm_state state);
+const char *to_mhi_pm_state_str(enum mhi_pm_state state);
+enum mhi_ee_type mhi_get_exec_env(struct mhi_controller *mhi_cntrl);
+int mhi_queue_state_transition(struct mhi_controller *mhi_cntrl,
+ enum dev_st_transition state);
+void mhi_pm_st_worker(struct work_struct *work);
+void mhi_pm_sys_err_handler(struct mhi_controller *mhi_cntrl);
+void mhi_fw_load_worker(struct work_struct *work);
+int mhi_ready_state_transition(struct mhi_controller *mhi_cntrl);
+int mhi_pm_m0_transition(struct mhi_controller *mhi_cntrl);
+void mhi_pm_m1_transition(struct mhi_controller *mhi_cntrl);
+int mhi_pm_m3_transition(struct mhi_controller *mhi_cntrl);
+int __mhi_device_get_sync(struct mhi_controller *mhi_cntrl);
+int mhi_send_cmd(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan,
+ enum mhi_cmd_type cmd);
+static inline bool mhi_is_active(struct mhi_controller *mhi_cntrl)
+{
+ return (mhi_cntrl->dev_state >= MHI_STATE_M0 &&
+ mhi_cntrl->dev_state <= MHI_STATE_M3_FAST);
+}
+
+static inline void mhi_trigger_resume(struct mhi_controller *mhi_cntrl)
+{
+ pm_wakeup_event(&mhi_cntrl->mhi_dev->dev, 0);
+ mhi_cntrl->runtime_get(mhi_cntrl);
+ mhi_cntrl->runtime_put(mhi_cntrl);
+}
+
+/* Register access methods */
+void mhi_db_brstmode(struct mhi_controller *mhi_cntrl, struct db_cfg *db_cfg,
+ void __iomem *db_addr, dma_addr_t db_val);
+void mhi_db_brstmode_disable(struct mhi_controller *mhi_cntrl,
+ struct db_cfg *db_mode, void __iomem *db_addr,
+ dma_addr_t db_val);
+int __must_check mhi_read_reg(struct mhi_controller *mhi_cntrl,
+ void __iomem *base, u32 offset, u32 *out);
+int __must_check mhi_read_reg_field(struct mhi_controller *mhi_cntrl,
+ void __iomem *base, u32 offset, u32 mask,
+ u32 shift, u32 *out);
+void mhi_write_reg(struct mhi_controller *mhi_cntrl, void __iomem *base,
+ u32 offset, u32 val);
+void mhi_write_reg_field(struct mhi_controller *mhi_cntrl, void __iomem *base,
+ u32 offset, u32 mask, u32 shift, u32 val);
+void mhi_ring_er_db(struct mhi_event *mhi_event);
+void mhi_write_db(struct mhi_controller *mhi_cntrl, void __iomem *db_addr,
+ dma_addr_t db_val);
+void mhi_ring_cmd_db(struct mhi_controller *mhi_cntrl, struct mhi_cmd *mhi_cmd);
+void mhi_ring_chan_db(struct mhi_controller *mhi_cntrl,
+ struct mhi_chan *mhi_chan);
+
+/* Initialization methods */
+int mhi_init_mmio(struct mhi_controller *mhi_cntrl);
+int mhi_init_dev_ctxt(struct mhi_controller *mhi_cntrl);
+void mhi_deinit_dev_ctxt(struct mhi_controller *mhi_cntrl);
+int mhi_init_irq_setup(struct mhi_controller *mhi_cntrl);
+void mhi_deinit_free_irq(struct mhi_controller *mhi_cntrl);
+void mhi_rddm_prepare(struct mhi_controller *mhi_cntrl,
+ struct image_info *img_info);
+void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl);
+int mhi_prepare_channel(struct mhi_controller *mhi_cntrl,
+ struct mhi_chan *mhi_chan);
+int mhi_init_chan_ctxt(struct mhi_controller *mhi_cntrl,
+ struct mhi_chan *mhi_chan);
+void mhi_deinit_chan_ctxt(struct mhi_controller *mhi_cntrl,
+ struct mhi_chan *mhi_chan);
+void mhi_reset_chan(struct mhi_controller *mhi_cntrl,
+ struct mhi_chan *mhi_chan);
+
+/* Memory allocation methods */
+static inline void *mhi_alloc_coherent(struct mhi_controller *mhi_cntrl,
+ size_t size,
+ dma_addr_t *dma_handle,
+ gfp_t gfp)
+{
+ void *buf = dma_alloc_coherent(mhi_cntrl->cntrl_dev, size, dma_handle,
+ gfp);
+
+ return buf;
+}
+
+static inline void mhi_free_coherent(struct mhi_controller *mhi_cntrl,
+ size_t size,
+ void *vaddr,
+ dma_addr_t dma_handle)
+{
+ dma_free_coherent(mhi_cntrl->cntrl_dev, size, vaddr, dma_handle);
+}
+
+/* Event processing methods */
+void mhi_ctrl_ev_task(unsigned long data);
+void mhi_ev_task(unsigned long data);
+int mhi_process_data_event_ring(struct mhi_controller *mhi_cntrl,
+ struct mhi_event *mhi_event, u32 event_quota);
+int mhi_process_ctrl_ev_ring(struct mhi_controller *mhi_cntrl,
+ struct mhi_event *mhi_event, u32 event_quota);
+
+/* ISR handlers */
+irqreturn_t mhi_irq_handler(int irq_number, void *dev);
+irqreturn_t mhi_intvec_threaded_handler(int irq_number, void *dev);
+irqreturn_t mhi_intvec_handler(int irq_number, void *dev);
+
+int mhi_gen_tre(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan,
+ struct mhi_buf_info *info, enum mhi_flags flags);
+int mhi_map_single_no_bb(struct mhi_controller *mhi_cntrl,
+ struct mhi_buf_info *buf_info);
+int mhi_map_single_use_bb(struct mhi_controller *mhi_cntrl,
+ struct mhi_buf_info *buf_info);
+void mhi_unmap_single_no_bb(struct mhi_controller *mhi_cntrl,
+ struct mhi_buf_info *buf_info);
+void mhi_unmap_single_use_bb(struct mhi_controller *mhi_cntrl,
+ struct mhi_buf_info *buf_info);
+
+#endif /* _MHI_INT_H */
diff --git a/drivers/bus/mhi/host/main.c b/drivers/bus/mhi/host/main.c
new file mode 100644
index 000000000000..614dd287cb4f
--- /dev/null
+++ b/drivers/bus/mhi/host/main.c
@@ -0,0 +1,1630 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/dma-direction.h>
+#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/mhi.h>
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include "internal.h"
+
+int __must_check mhi_read_reg(struct mhi_controller *mhi_cntrl,
+ void __iomem *base, u32 offset, u32 *out)
+{
+ return mhi_cntrl->read_reg(mhi_cntrl, base + offset, out);
+}
+
+int __must_check mhi_read_reg_field(struct mhi_controller *mhi_cntrl,
+ void __iomem *base, u32 offset,
+ u32 mask, u32 shift, u32 *out)
+{
+ u32 tmp;
+ int ret;
+
+ ret = mhi_read_reg(mhi_cntrl, base, offset, &tmp);
+ if (ret)
+ return ret;
+
+ *out = (tmp & mask) >> shift;
+
+ return 0;
+}
+
+void mhi_write_reg(struct mhi_controller *mhi_cntrl, void __iomem *base,
+ u32 offset, u32 val)
+{
+ mhi_cntrl->write_reg(mhi_cntrl, base + offset, val);
+}
+
+void mhi_write_reg_field(struct mhi_controller *mhi_cntrl, void __iomem *base,
+ u32 offset, u32 mask, u32 shift, u32 val)
+{
+ int ret;
+ u32 tmp;
+
+ ret = mhi_read_reg(mhi_cntrl, base, offset, &tmp);
+ if (ret)
+ return;
+
+ tmp &= ~mask;
+ tmp |= (val << shift);
+ mhi_write_reg(mhi_cntrl, base, offset, tmp);
+}
+
+void mhi_write_db(struct mhi_controller *mhi_cntrl, void __iomem *db_addr,
+ dma_addr_t db_val)
+{
+ mhi_write_reg(mhi_cntrl, db_addr, 4, upper_32_bits(db_val));
+ mhi_write_reg(mhi_cntrl, db_addr, 0, lower_32_bits(db_val));
+}
+
+void mhi_db_brstmode(struct mhi_controller *mhi_cntrl,
+ struct db_cfg *db_cfg,
+ void __iomem *db_addr,
+ dma_addr_t db_val)
+{
+ if (db_cfg->db_mode) {
+ db_cfg->db_val = db_val;
+ mhi_write_db(mhi_cntrl, db_addr, db_val);
+ db_cfg->db_mode = 0;
+ }
+}
+
+void mhi_db_brstmode_disable(struct mhi_controller *mhi_cntrl,
+ struct db_cfg *db_cfg,
+ void __iomem *db_addr,
+ dma_addr_t db_val)
+{
+ db_cfg->db_val = db_val;
+ mhi_write_db(mhi_cntrl, db_addr, db_val);
+}
+
+void mhi_ring_er_db(struct mhi_event *mhi_event)
+{
+ struct mhi_ring *ring = &mhi_event->ring;
+
+ mhi_event->db_cfg.process_db(mhi_event->mhi_cntrl, &mhi_event->db_cfg,
+ ring->db_addr, *ring->ctxt_wp);
+}
+
+void mhi_ring_cmd_db(struct mhi_controller *mhi_cntrl, struct mhi_cmd *mhi_cmd)
+{
+ dma_addr_t db;
+ struct mhi_ring *ring = &mhi_cmd->ring;
+
+ db = ring->iommu_base + (ring->wp - ring->base);
+ *ring->ctxt_wp = db;
+ mhi_write_db(mhi_cntrl, ring->db_addr, db);
+}
+
+void mhi_ring_chan_db(struct mhi_controller *mhi_cntrl,
+ struct mhi_chan *mhi_chan)
+{
+ struct mhi_ring *ring = &mhi_chan->tre_ring;
+ dma_addr_t db;
+
+ db = ring->iommu_base + (ring->wp - ring->base);
+ *ring->ctxt_wp = db;
+ mhi_chan->db_cfg.process_db(mhi_cntrl, &mhi_chan->db_cfg,
+ ring->db_addr, db);
+}
+
+enum mhi_ee_type mhi_get_exec_env(struct mhi_controller *mhi_cntrl)
+{
+ u32 exec;
+ int ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_EXECENV, &exec);
+
+ return (ret) ? MHI_EE_MAX : exec;
+}
+
+enum mhi_state mhi_get_mhi_state(struct mhi_controller *mhi_cntrl)
+{
+ u32 state;
+ int ret = mhi_read_reg_field(mhi_cntrl, mhi_cntrl->regs, MHISTATUS,
+ MHISTATUS_MHISTATE_MASK,
+ MHISTATUS_MHISTATE_SHIFT, &state);
+ return ret ? MHI_STATE_MAX : state;
+}
+
+int mhi_map_single_no_bb(struct mhi_controller *mhi_cntrl,
+ struct mhi_buf_info *buf_info)
+{
+ buf_info->p_addr = dma_map_single(mhi_cntrl->cntrl_dev,
+ buf_info->v_addr, buf_info->len,
+ buf_info->dir);
+ if (dma_mapping_error(mhi_cntrl->cntrl_dev, buf_info->p_addr))
+ return -ENOMEM;
+
+ return 0;
+}
+
+int mhi_map_single_use_bb(struct mhi_controller *mhi_cntrl,
+ struct mhi_buf_info *buf_info)
+{
+ void *buf = mhi_alloc_coherent(mhi_cntrl, buf_info->len,
+ &buf_info->p_addr, GFP_ATOMIC);
+
+ if (!buf)
+ return -ENOMEM;
+
+ if (buf_info->dir == DMA_TO_DEVICE)
+ memcpy(buf, buf_info->v_addr, buf_info->len);
+
+ buf_info->bb_addr = buf;
+
+ return 0;
+}
+
+void mhi_unmap_single_no_bb(struct mhi_controller *mhi_cntrl,
+ struct mhi_buf_info *buf_info)
+{
+ dma_unmap_single(mhi_cntrl->cntrl_dev, buf_info->p_addr, buf_info->len,
+ buf_info->dir);
+}
+
+void mhi_unmap_single_use_bb(struct mhi_controller *mhi_cntrl,
+ struct mhi_buf_info *buf_info)
+{
+ if (buf_info->dir == DMA_FROM_DEVICE)
+ memcpy(buf_info->v_addr, buf_info->bb_addr, buf_info->len);
+
+ mhi_free_coherent(mhi_cntrl, buf_info->len, buf_info->bb_addr,
+ buf_info->p_addr);
+}
+
+static int get_nr_avail_ring_elements(struct mhi_controller *mhi_cntrl,
+ struct mhi_ring *ring)
+{
+ int nr_el;
+
+ if (ring->wp < ring->rp) {
+ nr_el = ((ring->rp - ring->wp) / ring->el_size) - 1;
+ } else {
+ nr_el = (ring->rp - ring->base) / ring->el_size;
+ nr_el += ((ring->base + ring->len - ring->wp) /
+ ring->el_size) - 1;
+ }
+
+ return nr_el;
+}
+
+static void *mhi_to_virtual(struct mhi_ring *ring, dma_addr_t addr)
+{
+ return (addr - ring->iommu_base) + ring->base;
+}
+
+static void mhi_add_ring_element(struct mhi_controller *mhi_cntrl,
+ struct mhi_ring *ring)
+{
+ ring->wp += ring->el_size;
+ if (ring->wp >= (ring->base + ring->len))
+ ring->wp = ring->base;
+ /* smp update */
+ smp_wmb();
+}
+
+static void mhi_del_ring_element(struct mhi_controller *mhi_cntrl,
+ struct mhi_ring *ring)
+{
+ ring->rp += ring->el_size;
+ if (ring->rp >= (ring->base + ring->len))
+ ring->rp = ring->base;
+ /* smp update */
+ smp_wmb();
+}
+
+static bool is_valid_ring_ptr(struct mhi_ring *ring, dma_addr_t addr)
+{
+ return addr >= ring->iommu_base && addr < ring->iommu_base + ring->len;
+}
+
+int mhi_destroy_device(struct device *dev, void *data)
+{
+ struct mhi_chan *ul_chan, *dl_chan;
+ struct mhi_device *mhi_dev;
+ struct mhi_controller *mhi_cntrl;
+ enum mhi_ee_type ee = MHI_EE_MAX;
+
+ if (dev->bus != &mhi_bus_type)
+ return 0;
+
+ mhi_dev = to_mhi_device(dev);
+ mhi_cntrl = mhi_dev->mhi_cntrl;
+
+ /* Only destroy virtual devices thats attached to bus */
+ if (mhi_dev->dev_type == MHI_DEVICE_CONTROLLER)
+ return 0;
+
+ ul_chan = mhi_dev->ul_chan;
+ dl_chan = mhi_dev->dl_chan;
+
+ /*
+ * If execution environment is specified, remove only those devices that
+ * started in them based on ee_mask for the channels as we move on to a
+ * different execution environment
+ */
+ if (data)
+ ee = *(enum mhi_ee_type *)data;
+
+ /*
+ * For the suspend and resume case, this function will get called
+ * without mhi_unregister_controller(). Hence, we need to drop the
+ * references to mhi_dev created for ul and dl channels. We can
+ * be sure that there will be no instances of mhi_dev left after
+ * this.
+ */
+ if (ul_chan) {
+ if (ee != MHI_EE_MAX && !(ul_chan->ee_mask & BIT(ee)))
+ return 0;
+
+ put_device(&ul_chan->mhi_dev->dev);
+ }
+
+ if (dl_chan) {
+ if (ee != MHI_EE_MAX && !(dl_chan->ee_mask & BIT(ee)))
+ return 0;
+
+ put_device(&dl_chan->mhi_dev->dev);
+ }
+
+ dev_dbg(&mhi_cntrl->mhi_dev->dev, "destroy device for chan:%s\n",
+ mhi_dev->name);
+
+ /* Notify the client and remove the device from MHI bus */
+ device_del(dev);
+ put_device(dev);
+
+ return 0;
+}
+
+void mhi_notify(struct mhi_device *mhi_dev, enum mhi_callback cb_reason)
+{
+ struct mhi_driver *mhi_drv;
+
+ if (!mhi_dev->dev.driver)
+ return;
+
+ mhi_drv = to_mhi_driver(mhi_dev->dev.driver);
+
+ if (mhi_drv->status_cb)
+ mhi_drv->status_cb(mhi_dev, cb_reason);
+}
+EXPORT_SYMBOL_GPL(mhi_notify);
+
+/* Bind MHI channels to MHI devices */
+void mhi_create_devices(struct mhi_controller *mhi_cntrl)
+{
+ struct mhi_chan *mhi_chan;
+ struct mhi_device *mhi_dev;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ int i, ret;
+
+ mhi_chan = mhi_cntrl->mhi_chan;
+ for (i = 0; i < mhi_cntrl->max_chan; i++, mhi_chan++) {
+ if (!mhi_chan->configured || mhi_chan->mhi_dev ||
+ !(mhi_chan->ee_mask & BIT(mhi_cntrl->ee)))
+ continue;
+ mhi_dev = mhi_alloc_device(mhi_cntrl);
+ if (IS_ERR(mhi_dev))
+ return;
+
+ mhi_dev->dev_type = MHI_DEVICE_XFER;
+ switch (mhi_chan->dir) {
+ case DMA_TO_DEVICE:
+ mhi_dev->ul_chan = mhi_chan;
+ mhi_dev->ul_chan_id = mhi_chan->chan;
+ break;
+ case DMA_FROM_DEVICE:
+ /* We use dl_chan as offload channels */
+ mhi_dev->dl_chan = mhi_chan;
+ mhi_dev->dl_chan_id = mhi_chan->chan;
+ break;
+ default:
+ dev_err(dev, "Direction not supported\n");
+ put_device(&mhi_dev->dev);
+ return;
+ }
+
+ get_device(&mhi_dev->dev);
+ mhi_chan->mhi_dev = mhi_dev;
+
+ /* Check next channel if it matches */
+ if ((i + 1) < mhi_cntrl->max_chan && mhi_chan[1].configured) {
+ if (!strcmp(mhi_chan[1].name, mhi_chan->name)) {
+ i++;
+ mhi_chan++;
+ if (mhi_chan->dir == DMA_TO_DEVICE) {
+ mhi_dev->ul_chan = mhi_chan;
+ mhi_dev->ul_chan_id = mhi_chan->chan;
+ } else {
+ mhi_dev->dl_chan = mhi_chan;
+ mhi_dev->dl_chan_id = mhi_chan->chan;
+ }
+ get_device(&mhi_dev->dev);
+ mhi_chan->mhi_dev = mhi_dev;
+ }
+ }
+
+ /* Channel name is same for both UL and DL */
+ mhi_dev->name = mhi_chan->name;
+ dev_set_name(&mhi_dev->dev, "%s_%s",
+ dev_name(mhi_cntrl->cntrl_dev),
+ mhi_dev->name);
+
+ /* Init wakeup source if available */
+ if (mhi_dev->dl_chan && mhi_dev->dl_chan->wake_capable)
+ device_init_wakeup(&mhi_dev->dev, true);
+
+ ret = device_add(&mhi_dev->dev);
+ if (ret)
+ put_device(&mhi_dev->dev);
+ }
+}
+
+irqreturn_t mhi_irq_handler(int irq_number, void *dev)
+{
+ struct mhi_event *mhi_event = dev;
+ struct mhi_controller *mhi_cntrl = mhi_event->mhi_cntrl;
+ struct mhi_event_ctxt *er_ctxt =
+ &mhi_cntrl->mhi_ctxt->er_ctxt[mhi_event->er_index];
+ struct mhi_ring *ev_ring = &mhi_event->ring;
+ dma_addr_t ptr = er_ctxt->rp;
+ void *dev_rp;
+
+ if (!is_valid_ring_ptr(ev_ring, ptr)) {
+ dev_err(&mhi_cntrl->mhi_dev->dev,
+ "Event ring rp points outside of the event ring\n");
+ return IRQ_HANDLED;
+ }
+
+ dev_rp = mhi_to_virtual(ev_ring, ptr);
+
+ /* Only proceed if event ring has pending events */
+ if (ev_ring->rp == dev_rp)
+ return IRQ_HANDLED;
+
+ /* For client managed event ring, notify pending data */
+ if (mhi_event->cl_manage) {
+ struct mhi_chan *mhi_chan = mhi_event->mhi_chan;
+ struct mhi_device *mhi_dev = mhi_chan->mhi_dev;
+
+ if (mhi_dev)
+ mhi_notify(mhi_dev, MHI_CB_PENDING_DATA);
+ } else {
+ tasklet_schedule(&mhi_event->task);
+ }
+
+ return IRQ_HANDLED;
+}
+
+irqreturn_t mhi_intvec_threaded_handler(int irq_number, void *priv)
+{
+ struct mhi_controller *mhi_cntrl = priv;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ enum mhi_state state = MHI_STATE_MAX;
+ enum mhi_pm_state pm_state = 0;
+ enum mhi_ee_type ee = 0;
+
+ write_lock_irq(&mhi_cntrl->pm_lock);
+ if (!MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state)) {
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+ goto exit_intvec;
+ }
+
+ state = mhi_get_mhi_state(mhi_cntrl);
+ ee = mhi_cntrl->ee;
+ mhi_cntrl->ee = mhi_get_exec_env(mhi_cntrl);
+ dev_dbg(dev, "local ee:%s device ee:%s dev_state:%s\n",
+ TO_MHI_EXEC_STR(mhi_cntrl->ee), TO_MHI_EXEC_STR(ee),
+ TO_MHI_STATE_STR(state));
+
+ if (state == MHI_STATE_SYS_ERR) {
+ dev_dbg(dev, "System error detected\n");
+ pm_state = mhi_tryset_pm_state(mhi_cntrl,
+ MHI_PM_SYS_ERR_DETECT);
+ }
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+
+ /* If device supports RDDM don't bother processing SYS error */
+ if (mhi_cntrl->rddm_image) {
+ if (mhi_cntrl->ee == MHI_EE_RDDM && mhi_cntrl->ee != ee) {
+ mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_EE_RDDM);
+ wake_up_all(&mhi_cntrl->state_event);
+ }
+ goto exit_intvec;
+ }
+
+ if (pm_state == MHI_PM_SYS_ERR_DETECT) {
+ wake_up_all(&mhi_cntrl->state_event);
+
+ /* For fatal errors, we let controller decide next step */
+ if (MHI_IN_PBL(ee))
+ mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_FATAL_ERROR);
+ else
+ mhi_pm_sys_err_handler(mhi_cntrl);
+ }
+
+exit_intvec:
+
+ return IRQ_HANDLED;
+}
+
+irqreturn_t mhi_intvec_handler(int irq_number, void *dev)
+{
+ struct mhi_controller *mhi_cntrl = dev;
+
+ /* Wake up events waiting for state change */
+ wake_up_all(&mhi_cntrl->state_event);
+
+ return IRQ_WAKE_THREAD;
+}
+
+static void mhi_recycle_ev_ring_element(struct mhi_controller *mhi_cntrl,
+ struct mhi_ring *ring)
+{
+ dma_addr_t ctxt_wp;
+
+ /* Update the WP */
+ ring->wp += ring->el_size;
+ ctxt_wp = *ring->ctxt_wp + ring->el_size;
+
+ if (ring->wp >= (ring->base + ring->len)) {
+ ring->wp = ring->base;
+ ctxt_wp = ring->iommu_base;
+ }
+
+ *ring->ctxt_wp = ctxt_wp;
+
+ /* Update the RP */
+ ring->rp += ring->el_size;
+ if (ring->rp >= (ring->base + ring->len))
+ ring->rp = ring->base;
+
+ /* Update to all cores */
+ smp_wmb();
+}
+
+static int parse_xfer_event(struct mhi_controller *mhi_cntrl,
+ struct mhi_tre *event,
+ struct mhi_chan *mhi_chan)
+{
+ struct mhi_ring *buf_ring, *tre_ring;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ struct mhi_result result;
+ unsigned long flags = 0;
+ u32 ev_code;
+
+ ev_code = MHI_TRE_GET_EV_CODE(event);
+ buf_ring = &mhi_chan->buf_ring;
+ tre_ring = &mhi_chan->tre_ring;
+
+ result.transaction_status = (ev_code == MHI_EV_CC_OVERFLOW) ?
+ -EOVERFLOW : 0;
+
+ /*
+ * If it's a DB Event then we need to grab the lock
+ * with preemption disabled and as a write because we
+ * have to update db register and there are chances that
+ * another thread could be doing the same.
+ */
+ if (ev_code >= MHI_EV_CC_OOB)
+ write_lock_irqsave(&mhi_chan->lock, flags);
+ else
+ read_lock_bh(&mhi_chan->lock);
+
+ if (mhi_chan->ch_state != MHI_CH_STATE_ENABLED)
+ goto end_process_tx_event;
+
+ switch (ev_code) {
+ case MHI_EV_CC_OVERFLOW:
+ case MHI_EV_CC_EOB:
+ case MHI_EV_CC_EOT:
+ {
+ dma_addr_t ptr = MHI_TRE_GET_EV_PTR(event);
+ struct mhi_tre *local_rp, *ev_tre;
+ void *dev_rp;
+ struct mhi_buf_info *buf_info;
+ u16 xfer_len;
+
+ if (!is_valid_ring_ptr(tre_ring, ptr)) {
+ dev_err(&mhi_cntrl->mhi_dev->dev,
+ "Event element points outside of the tre ring\n");
+ break;
+ }
+ /* Get the TRB this event points to */
+ ev_tre = mhi_to_virtual(tre_ring, ptr);
+
+ dev_rp = ev_tre + 1;
+ if (dev_rp >= (tre_ring->base + tre_ring->len))
+ dev_rp = tre_ring->base;
+
+ result.dir = mhi_chan->dir;
+
+ local_rp = tre_ring->rp;
+ while (local_rp != dev_rp) {
+ buf_info = buf_ring->rp;
+ /* If it's the last TRE, get length from the event */
+ if (local_rp == ev_tre)
+ xfer_len = MHI_TRE_GET_EV_LEN(event);
+ else
+ xfer_len = buf_info->len;
+
+ /* Unmap if it's not pre-mapped by client */
+ if (likely(!buf_info->pre_mapped))
+ mhi_cntrl->unmap_single(mhi_cntrl, buf_info);
+
+ result.buf_addr = buf_info->cb_buf;
+
+ /* truncate to buf len if xfer_len is larger */
+ result.bytes_xferd =
+ min_t(u16, xfer_len, buf_info->len);
+ mhi_del_ring_element(mhi_cntrl, buf_ring);
+ mhi_del_ring_element(mhi_cntrl, tre_ring);
+ local_rp = tre_ring->rp;
+
+ /* notify client */
+ mhi_chan->xfer_cb(mhi_chan->mhi_dev, &result);
+
+ if (mhi_chan->dir == DMA_TO_DEVICE)
+ atomic_dec(&mhi_cntrl->pending_pkts);
+
+ /*
+ * Recycle the buffer if buffer is pre-allocated,
+ * if there is an error, not much we can do apart
+ * from dropping the packet
+ */
+ if (mhi_chan->pre_alloc) {
+ if (mhi_queue_buf(mhi_chan->mhi_dev,
+ mhi_chan->dir,
+ buf_info->cb_buf,
+ buf_info->len, MHI_EOT)) {
+ dev_err(dev,
+ "Error recycling buffer for chan:%d\n",
+ mhi_chan->chan);
+ kfree(buf_info->cb_buf);
+ }
+ }
+ }
+ break;
+ } /* CC_EOT */
+ case MHI_EV_CC_OOB:
+ case MHI_EV_CC_DB_MODE:
+ {
+ unsigned long flags;
+
+ mhi_chan->db_cfg.db_mode = 1;
+ read_lock_irqsave(&mhi_cntrl->pm_lock, flags);
+ if (tre_ring->wp != tre_ring->rp &&
+ MHI_DB_ACCESS_VALID(mhi_cntrl)) {
+ mhi_ring_chan_db(mhi_cntrl, mhi_chan);
+ }
+ read_unlock_irqrestore(&mhi_cntrl->pm_lock, flags);
+ break;
+ }
+ case MHI_EV_CC_BAD_TRE:
+ default:
+ dev_err(dev, "Unknown event 0x%x\n", ev_code);
+ break;
+ } /* switch(MHI_EV_READ_CODE(EV_TRB_CODE,event)) */
+
+end_process_tx_event:
+ if (ev_code >= MHI_EV_CC_OOB)
+ write_unlock_irqrestore(&mhi_chan->lock, flags);
+ else
+ read_unlock_bh(&mhi_chan->lock);
+
+ return 0;
+}
+
+static int parse_rsc_event(struct mhi_controller *mhi_cntrl,
+ struct mhi_tre *event,
+ struct mhi_chan *mhi_chan)
+{
+ struct mhi_ring *buf_ring, *tre_ring;
+ struct mhi_buf_info *buf_info;
+ struct mhi_result result;
+ int ev_code;
+ u32 cookie; /* offset to local descriptor */
+ u16 xfer_len;
+
+ buf_ring = &mhi_chan->buf_ring;
+ tre_ring = &mhi_chan->tre_ring;
+
+ ev_code = MHI_TRE_GET_EV_CODE(event);
+ cookie = MHI_TRE_GET_EV_COOKIE(event);
+ xfer_len = MHI_TRE_GET_EV_LEN(event);
+
+ /* Received out of bound cookie */
+ WARN_ON(cookie >= buf_ring->len);
+
+ buf_info = buf_ring->base + cookie;
+
+ result.transaction_status = (ev_code == MHI_EV_CC_OVERFLOW) ?
+ -EOVERFLOW : 0;
+
+ /* truncate to buf len if xfer_len is larger */
+ result.bytes_xferd = min_t(u16, xfer_len, buf_info->len);
+ result.buf_addr = buf_info->cb_buf;
+ result.dir = mhi_chan->dir;
+
+ read_lock_bh(&mhi_chan->lock);
+
+ if (mhi_chan->ch_state != MHI_CH_STATE_ENABLED)
+ goto end_process_rsc_event;
+
+ WARN_ON(!buf_info->used);
+
+ /* notify the client */
+ mhi_chan->xfer_cb(mhi_chan->mhi_dev, &result);
+
+ /*
+ * Note: We're arbitrarily incrementing RP even though, completion
+ * packet we processed might not be the same one, reason we can do this
+ * is because device guaranteed to cache descriptors in order it
+ * receive, so even though completion event is different we can re-use
+ * all descriptors in between.
+ * Example:
+ * Transfer Ring has descriptors: A, B, C, D
+ * Last descriptor host queue is D (WP) and first descriptor
+ * host queue is A (RP).
+ * The completion event we just serviced is descriptor C.
+ * Then we can safely queue descriptors to replace A, B, and C
+ * even though host did not receive any completions.
+ */
+ mhi_del_ring_element(mhi_cntrl, tre_ring);
+ buf_info->used = false;
+
+end_process_rsc_event:
+ read_unlock_bh(&mhi_chan->lock);
+
+ return 0;
+}
+
+static void mhi_process_cmd_completion(struct mhi_controller *mhi_cntrl,
+ struct mhi_tre *tre)
+{
+ dma_addr_t ptr = MHI_TRE_GET_EV_PTR(tre);
+ struct mhi_cmd *cmd_ring = &mhi_cntrl->mhi_cmd[PRIMARY_CMD_RING];
+ struct mhi_ring *mhi_ring = &cmd_ring->ring;
+ struct mhi_tre *cmd_pkt;
+ struct mhi_chan *mhi_chan;
+ u32 chan;
+
+ if (!is_valid_ring_ptr(mhi_ring, ptr)) {
+ dev_err(&mhi_cntrl->mhi_dev->dev,
+ "Event element points outside of the cmd ring\n");
+ return;
+ }
+
+ cmd_pkt = mhi_to_virtual(mhi_ring, ptr);
+
+ chan = MHI_TRE_GET_CMD_CHID(cmd_pkt);
+
+ if (chan < mhi_cntrl->max_chan &&
+ mhi_cntrl->mhi_chan[chan].configured) {
+ mhi_chan = &mhi_cntrl->mhi_chan[chan];
+ write_lock_bh(&mhi_chan->lock);
+ mhi_chan->ccs = MHI_TRE_GET_EV_CODE(tre);
+ complete(&mhi_chan->completion);
+ write_unlock_bh(&mhi_chan->lock);
+ } else {
+ dev_err(&mhi_cntrl->mhi_dev->dev,
+ "Completion packet for invalid channel ID: %d\n", chan);
+ }
+
+ mhi_del_ring_element(mhi_cntrl, mhi_ring);
+}
+
+int mhi_process_ctrl_ev_ring(struct mhi_controller *mhi_cntrl,
+ struct mhi_event *mhi_event,
+ u32 event_quota)
+{
+ struct mhi_tre *dev_rp, *local_rp;
+ struct mhi_ring *ev_ring = &mhi_event->ring;
+ struct mhi_event_ctxt *er_ctxt =
+ &mhi_cntrl->mhi_ctxt->er_ctxt[mhi_event->er_index];
+ struct mhi_chan *mhi_chan;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ u32 chan;
+ int count = 0;
+ dma_addr_t ptr = er_ctxt->rp;
+
+ /*
+ * This is a quick check to avoid unnecessary event processing
+ * in case MHI is already in error state, but it's still possible
+ * to transition to error state while processing events
+ */
+ if (unlikely(MHI_EVENT_ACCESS_INVALID(mhi_cntrl->pm_state)))
+ return -EIO;
+
+ if (!is_valid_ring_ptr(ev_ring, ptr)) {
+ dev_err(&mhi_cntrl->mhi_dev->dev,
+ "Event ring rp points outside of the event ring\n");
+ return -EIO;
+ }
+
+ dev_rp = mhi_to_virtual(ev_ring, ptr);
+ local_rp = ev_ring->rp;
+
+ while (dev_rp != local_rp) {
+ enum mhi_pkt_type type = MHI_TRE_GET_EV_TYPE(local_rp);
+
+ switch (type) {
+ case MHI_PKT_TYPE_BW_REQ_EVENT:
+ {
+ struct mhi_link_info *link_info;
+
+ link_info = &mhi_cntrl->mhi_link_info;
+ write_lock_irq(&mhi_cntrl->pm_lock);
+ link_info->target_link_speed =
+ MHI_TRE_GET_EV_LINKSPEED(local_rp);
+ link_info->target_link_width =
+ MHI_TRE_GET_EV_LINKWIDTH(local_rp);
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+ dev_dbg(dev, "Received BW_REQ event\n");
+ mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_BW_REQ);
+ break;
+ }
+ case MHI_PKT_TYPE_STATE_CHANGE_EVENT:
+ {
+ enum mhi_state new_state;
+
+ new_state = MHI_TRE_GET_EV_STATE(local_rp);
+
+ dev_dbg(dev, "State change event to state: %s\n",
+ TO_MHI_STATE_STR(new_state));
+
+ switch (new_state) {
+ case MHI_STATE_M0:
+ mhi_pm_m0_transition(mhi_cntrl);
+ break;
+ case MHI_STATE_M1:
+ mhi_pm_m1_transition(mhi_cntrl);
+ break;
+ case MHI_STATE_M3:
+ mhi_pm_m3_transition(mhi_cntrl);
+ break;
+ case MHI_STATE_SYS_ERR:
+ {
+ enum mhi_pm_state new_state;
+
+ /* skip SYS_ERROR handling if RDDM supported */
+ if (mhi_cntrl->ee == MHI_EE_RDDM ||
+ mhi_cntrl->rddm_image)
+ break;
+
+ dev_dbg(dev, "System error detected\n");
+ write_lock_irq(&mhi_cntrl->pm_lock);
+ new_state = mhi_tryset_pm_state(mhi_cntrl,
+ MHI_PM_SYS_ERR_DETECT);
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+ if (new_state == MHI_PM_SYS_ERR_DETECT)
+ mhi_pm_sys_err_handler(mhi_cntrl);
+ break;
+ }
+ default:
+ dev_err(dev, "Invalid state: %s\n",
+ TO_MHI_STATE_STR(new_state));
+ }
+
+ break;
+ }
+ case MHI_PKT_TYPE_CMD_COMPLETION_EVENT:
+ mhi_process_cmd_completion(mhi_cntrl, local_rp);
+ break;
+ case MHI_PKT_TYPE_EE_EVENT:
+ {
+ enum dev_st_transition st = DEV_ST_TRANSITION_MAX;
+ enum mhi_ee_type event = MHI_TRE_GET_EV_EXECENV(local_rp);
+
+ dev_dbg(dev, "Received EE event: %s\n",
+ TO_MHI_EXEC_STR(event));
+ switch (event) {
+ case MHI_EE_SBL:
+ st = DEV_ST_TRANSITION_SBL;
+ break;
+ case MHI_EE_WFW:
+ case MHI_EE_AMSS:
+ st = DEV_ST_TRANSITION_MISSION_MODE;
+ break;
+ case MHI_EE_RDDM:
+ mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_EE_RDDM);
+ write_lock_irq(&mhi_cntrl->pm_lock);
+ mhi_cntrl->ee = event;
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+ wake_up_all(&mhi_cntrl->state_event);
+ break;
+ default:
+ dev_err(dev,
+ "Unhandled EE event: 0x%x\n", type);
+ }
+ if (st != DEV_ST_TRANSITION_MAX)
+ mhi_queue_state_transition(mhi_cntrl, st);
+
+ break;
+ }
+ case MHI_PKT_TYPE_TX_EVENT:
+ chan = MHI_TRE_GET_EV_CHID(local_rp);
+
+ WARN_ON(chan >= mhi_cntrl->max_chan);
+
+ /*
+ * Only process the event ring elements whose channel
+ * ID is within the maximum supported range.
+ */
+ if (chan < mhi_cntrl->max_chan) {
+ mhi_chan = &mhi_cntrl->mhi_chan[chan];
+ if (!mhi_chan->configured)
+ break;
+ parse_xfer_event(mhi_cntrl, local_rp, mhi_chan);
+ event_quota--;
+ }
+ break;
+ default:
+ dev_err(dev, "Unhandled event type: %d\n", type);
+ break;
+ }
+
+ mhi_recycle_ev_ring_element(mhi_cntrl, ev_ring);
+ local_rp = ev_ring->rp;
+
+ ptr = er_ctxt->rp;
+ if (!is_valid_ring_ptr(ev_ring, ptr)) {
+ dev_err(&mhi_cntrl->mhi_dev->dev,
+ "Event ring rp points outside of the event ring\n");
+ return -EIO;
+ }
+
+ dev_rp = mhi_to_virtual(ev_ring, ptr);
+ count++;
+ }
+
+ read_lock_bh(&mhi_cntrl->pm_lock);
+ if (likely(MHI_DB_ACCESS_VALID(mhi_cntrl)))
+ mhi_ring_er_db(mhi_event);
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+
+ return count;
+}
+
+int mhi_process_data_event_ring(struct mhi_controller *mhi_cntrl,
+ struct mhi_event *mhi_event,
+ u32 event_quota)
+{
+ struct mhi_tre *dev_rp, *local_rp;
+ struct mhi_ring *ev_ring = &mhi_event->ring;
+ struct mhi_event_ctxt *er_ctxt =
+ &mhi_cntrl->mhi_ctxt->er_ctxt[mhi_event->er_index];
+ int count = 0;
+ u32 chan;
+ struct mhi_chan *mhi_chan;
+ dma_addr_t ptr = er_ctxt->rp;
+
+ if (unlikely(MHI_EVENT_ACCESS_INVALID(mhi_cntrl->pm_state)))
+ return -EIO;
+
+ if (!is_valid_ring_ptr(ev_ring, ptr)) {
+ dev_err(&mhi_cntrl->mhi_dev->dev,
+ "Event ring rp points outside of the event ring\n");
+ return -EIO;
+ }
+
+ dev_rp = mhi_to_virtual(ev_ring, ptr);
+ local_rp = ev_ring->rp;
+
+ while (dev_rp != local_rp && event_quota > 0) {
+ enum mhi_pkt_type type = MHI_TRE_GET_EV_TYPE(local_rp);
+
+ chan = MHI_TRE_GET_EV_CHID(local_rp);
+
+ WARN_ON(chan >= mhi_cntrl->max_chan);
+
+ /*
+ * Only process the event ring elements whose channel
+ * ID is within the maximum supported range.
+ */
+ if (chan < mhi_cntrl->max_chan &&
+ mhi_cntrl->mhi_chan[chan].configured) {
+ mhi_chan = &mhi_cntrl->mhi_chan[chan];
+
+ if (likely(type == MHI_PKT_TYPE_TX_EVENT)) {
+ parse_xfer_event(mhi_cntrl, local_rp, mhi_chan);
+ event_quota--;
+ } else if (type == MHI_PKT_TYPE_RSC_TX_EVENT) {
+ parse_rsc_event(mhi_cntrl, local_rp, mhi_chan);
+ event_quota--;
+ }
+ }
+
+ mhi_recycle_ev_ring_element(mhi_cntrl, ev_ring);
+ local_rp = ev_ring->rp;
+
+ ptr = er_ctxt->rp;
+ if (!is_valid_ring_ptr(ev_ring, ptr)) {
+ dev_err(&mhi_cntrl->mhi_dev->dev,
+ "Event ring rp points outside of the event ring\n");
+ return -EIO;
+ }
+
+ dev_rp = mhi_to_virtual(ev_ring, ptr);
+ count++;
+ }
+ read_lock_bh(&mhi_cntrl->pm_lock);
+ if (likely(MHI_DB_ACCESS_VALID(mhi_cntrl)))
+ mhi_ring_er_db(mhi_event);
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+
+ return count;
+}
+
+void mhi_ev_task(unsigned long data)
+{
+ struct mhi_event *mhi_event = (struct mhi_event *)data;
+ struct mhi_controller *mhi_cntrl = mhi_event->mhi_cntrl;
+
+ /* process all pending events */
+ spin_lock_bh(&mhi_event->lock);
+ mhi_event->process_event(mhi_cntrl, mhi_event, U32_MAX);
+ spin_unlock_bh(&mhi_event->lock);
+}
+
+void mhi_ctrl_ev_task(unsigned long data)
+{
+ struct mhi_event *mhi_event = (struct mhi_event *)data;
+ struct mhi_controller *mhi_cntrl = mhi_event->mhi_cntrl;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ enum mhi_state state;
+ enum mhi_pm_state pm_state = 0;
+ int ret;
+
+ /*
+ * We can check PM state w/o a lock here because there is no way
+ * PM state can change from reg access valid to no access while this
+ * thread being executed.
+ */
+ if (!MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state)) {
+ /*
+ * We may have a pending event but not allowed to
+ * process it since we are probably in a suspended state,
+ * so trigger a resume.
+ */
+ mhi_trigger_resume(mhi_cntrl);
+
+ return;
+ }
+
+ /* Process ctrl events events */
+ ret = mhi_event->process_event(mhi_cntrl, mhi_event, U32_MAX);
+
+ /*
+ * We received an IRQ but no events to process, maybe device went to
+ * SYS_ERR state? Check the state to confirm.
+ */
+ if (!ret) {
+ write_lock_irq(&mhi_cntrl->pm_lock);
+ state = mhi_get_mhi_state(mhi_cntrl);
+ if (state == MHI_STATE_SYS_ERR) {
+ dev_dbg(dev, "System error detected\n");
+ pm_state = mhi_tryset_pm_state(mhi_cntrl,
+ MHI_PM_SYS_ERR_DETECT);
+ }
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+ if (pm_state == MHI_PM_SYS_ERR_DETECT)
+ mhi_pm_sys_err_handler(mhi_cntrl);
+ }
+}
+
+static bool mhi_is_ring_full(struct mhi_controller *mhi_cntrl,
+ struct mhi_ring *ring)
+{
+ void *tmp = ring->wp + ring->el_size;
+
+ if (tmp >= (ring->base + ring->len))
+ tmp = ring->base;
+
+ return (tmp == ring->rp);
+}
+
+int mhi_queue_skb(struct mhi_device *mhi_dev, enum dma_data_direction dir,
+ struct sk_buff *skb, size_t len, enum mhi_flags mflags)
+{
+ struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
+ struct mhi_chan *mhi_chan = (dir == DMA_TO_DEVICE) ? mhi_dev->ul_chan :
+ mhi_dev->dl_chan;
+ struct mhi_ring *tre_ring = &mhi_chan->tre_ring;
+ struct mhi_buf_info buf_info = { };
+ int ret;
+
+ /* If MHI host pre-allocates buffers then client drivers cannot queue */
+ if (mhi_chan->pre_alloc)
+ return -EINVAL;
+
+ if (mhi_is_ring_full(mhi_cntrl, tre_ring))
+ return -ENOMEM;
+
+ read_lock_bh(&mhi_cntrl->pm_lock);
+ if (unlikely(MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state))) {
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+ return -EIO;
+ }
+
+ /* we're in M3 or transitioning to M3 */
+ if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state))
+ mhi_trigger_resume(mhi_cntrl);
+
+ /* Toggle wake to exit out of M2 */
+ mhi_cntrl->wake_toggle(mhi_cntrl);
+
+ buf_info.v_addr = skb->data;
+ buf_info.cb_buf = skb;
+ buf_info.len = len;
+
+ ret = mhi_gen_tre(mhi_cntrl, mhi_chan, &buf_info, mflags);
+ if (unlikely(ret)) {
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+ return ret;
+ }
+
+ if (mhi_chan->dir == DMA_TO_DEVICE)
+ atomic_inc(&mhi_cntrl->pending_pkts);
+
+ if (likely(MHI_DB_ACCESS_VALID(mhi_cntrl))) {
+ read_lock_bh(&mhi_chan->lock);
+ mhi_ring_chan_db(mhi_cntrl, mhi_chan);
+ read_unlock_bh(&mhi_chan->lock);
+ }
+
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mhi_queue_skb);
+
+int mhi_queue_dma(struct mhi_device *mhi_dev, enum dma_data_direction dir,
+ struct mhi_buf *mhi_buf, size_t len, enum mhi_flags mflags)
+{
+ struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
+ struct mhi_chan *mhi_chan = (dir == DMA_TO_DEVICE) ? mhi_dev->ul_chan :
+ mhi_dev->dl_chan;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ struct mhi_ring *tre_ring = &mhi_chan->tre_ring;
+ struct mhi_buf_info buf_info = { };
+ int ret;
+
+ /* If MHI host pre-allocates buffers then client drivers cannot queue */
+ if (mhi_chan->pre_alloc)
+ return -EINVAL;
+
+ if (mhi_is_ring_full(mhi_cntrl, tre_ring))
+ return -ENOMEM;
+
+ read_lock_bh(&mhi_cntrl->pm_lock);
+ if (unlikely(MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state))) {
+ dev_err(dev, "MHI is not in activate state, PM state: %s\n",
+ to_mhi_pm_state_str(mhi_cntrl->pm_state));
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+
+ return -EIO;
+ }
+
+ /* we're in M3 or transitioning to M3 */
+ if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state))
+ mhi_trigger_resume(mhi_cntrl);
+
+ /* Toggle wake to exit out of M2 */
+ mhi_cntrl->wake_toggle(mhi_cntrl);
+
+ buf_info.p_addr = mhi_buf->dma_addr;
+ buf_info.cb_buf = mhi_buf;
+ buf_info.pre_mapped = true;
+ buf_info.len = len;
+
+ ret = mhi_gen_tre(mhi_cntrl, mhi_chan, &buf_info, mflags);
+ if (unlikely(ret)) {
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+ return ret;
+ }
+
+ if (mhi_chan->dir == DMA_TO_DEVICE)
+ atomic_inc(&mhi_cntrl->pending_pkts);
+
+ if (likely(MHI_DB_ACCESS_VALID(mhi_cntrl))) {
+ read_lock_bh(&mhi_chan->lock);
+ mhi_ring_chan_db(mhi_cntrl, mhi_chan);
+ read_unlock_bh(&mhi_chan->lock);
+ }
+
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mhi_queue_dma);
+
+int mhi_gen_tre(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan,
+ struct mhi_buf_info *info, enum mhi_flags flags)
+{
+ struct mhi_ring *buf_ring, *tre_ring;
+ struct mhi_tre *mhi_tre;
+ struct mhi_buf_info *buf_info;
+ int eot, eob, chain, bei;
+ int ret;
+
+ buf_ring = &mhi_chan->buf_ring;
+ tre_ring = &mhi_chan->tre_ring;
+
+ buf_info = buf_ring->wp;
+ WARN_ON(buf_info->used);
+ buf_info->pre_mapped = info->pre_mapped;
+ if (info->pre_mapped)
+ buf_info->p_addr = info->p_addr;
+ else
+ buf_info->v_addr = info->v_addr;
+ buf_info->cb_buf = info->cb_buf;
+ buf_info->wp = tre_ring->wp;
+ buf_info->dir = mhi_chan->dir;
+ buf_info->len = info->len;
+
+ if (!info->pre_mapped) {
+ ret = mhi_cntrl->map_single(mhi_cntrl, buf_info);
+ if (ret)
+ return ret;
+ }
+
+ eob = !!(flags & MHI_EOB);
+ eot = !!(flags & MHI_EOT);
+ chain = !!(flags & MHI_CHAIN);
+ bei = !!(mhi_chan->intmod);
+
+ mhi_tre = tre_ring->wp;
+ mhi_tre->ptr = MHI_TRE_DATA_PTR(buf_info->p_addr);
+ mhi_tre->dword[0] = MHI_TRE_DATA_DWORD0(info->len);
+ mhi_tre->dword[1] = MHI_TRE_DATA_DWORD1(bei, eot, eob, chain);
+
+ /* increment WP */
+ mhi_add_ring_element(mhi_cntrl, tre_ring);
+ mhi_add_ring_element(mhi_cntrl, buf_ring);
+
+ return 0;
+}
+
+int mhi_queue_buf(struct mhi_device *mhi_dev, enum dma_data_direction dir,
+ void *buf, size_t len, enum mhi_flags mflags)
+{
+ struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
+ struct mhi_chan *mhi_chan = (dir == DMA_TO_DEVICE) ? mhi_dev->ul_chan :
+ mhi_dev->dl_chan;
+ struct mhi_ring *tre_ring;
+ struct mhi_buf_info buf_info = { };
+ unsigned long flags;
+ int ret;
+
+ /*
+ * this check here only as a guard, it's always
+ * possible mhi can enter error while executing rest of function,
+ * which is not fatal so we do not need to hold pm_lock
+ */
+ if (unlikely(MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)))
+ return -EIO;
+
+ tre_ring = &mhi_chan->tre_ring;
+ if (mhi_is_ring_full(mhi_cntrl, tre_ring))
+ return -ENOMEM;
+
+ buf_info.v_addr = buf;
+ buf_info.cb_buf = buf;
+ buf_info.len = len;
+
+ ret = mhi_gen_tre(mhi_cntrl, mhi_chan, &buf_info, mflags);
+ if (unlikely(ret))
+ return ret;
+
+ read_lock_irqsave(&mhi_cntrl->pm_lock, flags);
+
+ /* we're in M3 or transitioning to M3 */
+ if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state))
+ mhi_trigger_resume(mhi_cntrl);
+
+ /* Toggle wake to exit out of M2 */
+ mhi_cntrl->wake_toggle(mhi_cntrl);
+
+ if (mhi_chan->dir == DMA_TO_DEVICE)
+ atomic_inc(&mhi_cntrl->pending_pkts);
+
+ if (likely(MHI_DB_ACCESS_VALID(mhi_cntrl))) {
+ unsigned long flags;
+
+ read_lock_irqsave(&mhi_chan->lock, flags);
+ mhi_ring_chan_db(mhi_cntrl, mhi_chan);
+ read_unlock_irqrestore(&mhi_chan->lock, flags);
+ }
+
+ read_unlock_irqrestore(&mhi_cntrl->pm_lock, flags);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mhi_queue_buf);
+
+int mhi_send_cmd(struct mhi_controller *mhi_cntrl,
+ struct mhi_chan *mhi_chan,
+ enum mhi_cmd_type cmd)
+{
+ struct mhi_tre *cmd_tre = NULL;
+ struct mhi_cmd *mhi_cmd = &mhi_cntrl->mhi_cmd[PRIMARY_CMD_RING];
+ struct mhi_ring *ring = &mhi_cmd->ring;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ int chan = 0;
+
+ if (mhi_chan)
+ chan = mhi_chan->chan;
+
+ spin_lock_bh(&mhi_cmd->lock);
+ if (!get_nr_avail_ring_elements(mhi_cntrl, ring)) {
+ spin_unlock_bh(&mhi_cmd->lock);
+ return -ENOMEM;
+ }
+
+ /* prepare the cmd tre */
+ cmd_tre = ring->wp;
+ switch (cmd) {
+ case MHI_CMD_RESET_CHAN:
+ cmd_tre->ptr = MHI_TRE_CMD_RESET_PTR;
+ cmd_tre->dword[0] = MHI_TRE_CMD_RESET_DWORD0;
+ cmd_tre->dword[1] = MHI_TRE_CMD_RESET_DWORD1(chan);
+ break;
+ case MHI_CMD_START_CHAN:
+ cmd_tre->ptr = MHI_TRE_CMD_START_PTR;
+ cmd_tre->dword[0] = MHI_TRE_CMD_START_DWORD0;
+ cmd_tre->dword[1] = MHI_TRE_CMD_START_DWORD1(chan);
+ break;
+ default:
+ dev_err(dev, "Command not supported\n");
+ break;
+ }
+
+ /* queue to hardware */
+ mhi_add_ring_element(mhi_cntrl, ring);
+ read_lock_bh(&mhi_cntrl->pm_lock);
+ if (likely(MHI_DB_ACCESS_VALID(mhi_cntrl)))
+ mhi_ring_cmd_db(mhi_cntrl, mhi_cmd);
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+ spin_unlock_bh(&mhi_cmd->lock);
+
+ return 0;
+}
+
+static void __mhi_unprepare_channel(struct mhi_controller *mhi_cntrl,
+ struct mhi_chan *mhi_chan)
+{
+ int ret;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+
+ dev_dbg(dev, "Entered: unprepare channel:%d\n", mhi_chan->chan);
+
+ /* no more processing events for this channel */
+ mutex_lock(&mhi_chan->mutex);
+ write_lock_irq(&mhi_chan->lock);
+ if (mhi_chan->ch_state != MHI_CH_STATE_ENABLED) {
+ write_unlock_irq(&mhi_chan->lock);
+ mutex_unlock(&mhi_chan->mutex);
+ return;
+ }
+
+ mhi_chan->ch_state = MHI_CH_STATE_DISABLED;
+ write_unlock_irq(&mhi_chan->lock);
+
+ reinit_completion(&mhi_chan->completion);
+ read_lock_bh(&mhi_cntrl->pm_lock);
+ if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+ goto error_invalid_state;
+ }
+
+ mhi_cntrl->wake_toggle(mhi_cntrl);
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+
+ mhi_cntrl->runtime_get(mhi_cntrl);
+ mhi_cntrl->runtime_put(mhi_cntrl);
+ ret = mhi_send_cmd(mhi_cntrl, mhi_chan, MHI_CMD_RESET_CHAN);
+ if (ret)
+ goto error_invalid_state;
+
+ /* even if it fails we will still reset */
+ ret = wait_for_completion_timeout(&mhi_chan->completion,
+ msecs_to_jiffies(mhi_cntrl->timeout_ms));
+ if (!ret || mhi_chan->ccs != MHI_EV_CC_SUCCESS)
+ dev_err(dev,
+ "Failed to receive cmd completion, still resetting\n");
+
+error_invalid_state:
+ if (!mhi_chan->offload_ch) {
+ mhi_reset_chan(mhi_cntrl, mhi_chan);
+ mhi_deinit_chan_ctxt(mhi_cntrl, mhi_chan);
+ }
+ dev_dbg(dev, "chan:%d successfully resetted\n", mhi_chan->chan);
+ mutex_unlock(&mhi_chan->mutex);
+}
+
+int mhi_prepare_channel(struct mhi_controller *mhi_cntrl,
+ struct mhi_chan *mhi_chan)
+{
+ int ret = 0;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+
+ dev_dbg(dev, "Preparing channel: %d\n", mhi_chan->chan);
+
+ if (!(BIT(mhi_cntrl->ee) & mhi_chan->ee_mask)) {
+ dev_err(dev,
+ "Current EE: %s Required EE Mask: 0x%x for chan: %s\n",
+ TO_MHI_EXEC_STR(mhi_cntrl->ee), mhi_chan->ee_mask,
+ mhi_chan->name);
+ return -ENOTCONN;
+ }
+
+ mutex_lock(&mhi_chan->mutex);
+
+ /* If channel is not in disable state, do not allow it to start */
+ if (mhi_chan->ch_state != MHI_CH_STATE_DISABLED) {
+ ret = -EIO;
+ dev_dbg(dev, "channel: %d is not in disabled state\n",
+ mhi_chan->chan);
+ goto error_init_chan;
+ }
+
+ /* Check of client manages channel context for offload channels */
+ if (!mhi_chan->offload_ch) {
+ ret = mhi_init_chan_ctxt(mhi_cntrl, mhi_chan);
+ if (ret)
+ goto error_init_chan;
+ }
+
+ reinit_completion(&mhi_chan->completion);
+ read_lock_bh(&mhi_cntrl->pm_lock);
+ if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+ ret = -EIO;
+ goto error_pm_state;
+ }
+
+ mhi_cntrl->wake_toggle(mhi_cntrl);
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+ mhi_cntrl->runtime_get(mhi_cntrl);
+ mhi_cntrl->runtime_put(mhi_cntrl);
+
+ ret = mhi_send_cmd(mhi_cntrl, mhi_chan, MHI_CMD_START_CHAN);
+ if (ret)
+ goto error_pm_state;
+
+ ret = wait_for_completion_timeout(&mhi_chan->completion,
+ msecs_to_jiffies(mhi_cntrl->timeout_ms));
+ if (!ret || mhi_chan->ccs != MHI_EV_CC_SUCCESS) {
+ ret = -EIO;
+ goto error_pm_state;
+ }
+
+ write_lock_irq(&mhi_chan->lock);
+ mhi_chan->ch_state = MHI_CH_STATE_ENABLED;
+ write_unlock_irq(&mhi_chan->lock);
+
+ /* Pre-allocate buffer for xfer ring */
+ if (mhi_chan->pre_alloc) {
+ int nr_el = get_nr_avail_ring_elements(mhi_cntrl,
+ &mhi_chan->tre_ring);
+ size_t len = mhi_cntrl->buffer_len;
+
+ while (nr_el--) {
+ void *buf;
+ struct mhi_buf_info info = { };
+ buf = kmalloc(len, GFP_KERNEL);
+ if (!buf) {
+ ret = -ENOMEM;
+ goto error_pre_alloc;
+ }
+
+ /* Prepare transfer descriptors */
+ info.v_addr = buf;
+ info.cb_buf = buf;
+ info.len = len;
+ ret = mhi_gen_tre(mhi_cntrl, mhi_chan, &info, MHI_EOT);
+ if (ret) {
+ kfree(buf);
+ goto error_pre_alloc;
+ }
+ }
+
+ read_lock_bh(&mhi_cntrl->pm_lock);
+ if (MHI_DB_ACCESS_VALID(mhi_cntrl)) {
+ read_lock_irq(&mhi_chan->lock);
+ mhi_ring_chan_db(mhi_cntrl, mhi_chan);
+ read_unlock_irq(&mhi_chan->lock);
+ }
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+ }
+
+ mutex_unlock(&mhi_chan->mutex);
+
+ dev_dbg(dev, "Chan: %d successfully moved to start state\n",
+ mhi_chan->chan);
+
+ return 0;
+
+error_pm_state:
+ if (!mhi_chan->offload_ch)
+ mhi_deinit_chan_ctxt(mhi_cntrl, mhi_chan);
+
+error_init_chan:
+ mutex_unlock(&mhi_chan->mutex);
+
+ return ret;
+
+error_pre_alloc:
+ mutex_unlock(&mhi_chan->mutex);
+ __mhi_unprepare_channel(mhi_cntrl, mhi_chan);
+
+ return ret;
+}
+
+static void mhi_mark_stale_events(struct mhi_controller *mhi_cntrl,
+ struct mhi_event *mhi_event,
+ struct mhi_event_ctxt *er_ctxt,
+ int chan)
+
+{
+ struct mhi_tre *dev_rp, *local_rp;
+ struct mhi_ring *ev_ring;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ unsigned long flags;
+ dma_addr_t ptr;
+
+ dev_dbg(dev, "Marking all events for chan: %d as stale\n", chan);
+
+ ev_ring = &mhi_event->ring;
+
+ /* mark all stale events related to channel as STALE event */
+ spin_lock_irqsave(&mhi_event->lock, flags);
+
+ ptr = er_ctxt->rp;
+ if (!is_valid_ring_ptr(ev_ring, ptr)) {
+ dev_err(&mhi_cntrl->mhi_dev->dev,
+ "Event ring rp points outside of the event ring\n");
+ dev_rp = ev_ring->rp;
+ } else {
+ dev_rp = mhi_to_virtual(ev_ring, ptr);
+ }
+
+ local_rp = ev_ring->rp;
+ while (dev_rp != local_rp) {
+ if (MHI_TRE_GET_EV_TYPE(local_rp) == MHI_PKT_TYPE_TX_EVENT &&
+ chan == MHI_TRE_GET_EV_CHID(local_rp))
+ local_rp->dword[1] = MHI_TRE_EV_DWORD1(chan,
+ MHI_PKT_TYPE_STALE_EVENT);
+ local_rp++;
+ if (local_rp == (ev_ring->base + ev_ring->len))
+ local_rp = ev_ring->base;
+ }
+
+ dev_dbg(dev, "Finished marking events as stale events\n");
+ spin_unlock_irqrestore(&mhi_event->lock, flags);
+}
+
+static void mhi_reset_data_chan(struct mhi_controller *mhi_cntrl,
+ struct mhi_chan *mhi_chan)
+{
+ struct mhi_ring *buf_ring, *tre_ring;
+ struct mhi_result result;
+
+ /* Reset any pending buffers */
+ buf_ring = &mhi_chan->buf_ring;
+ tre_ring = &mhi_chan->tre_ring;
+ result.transaction_status = -ENOTCONN;
+ result.bytes_xferd = 0;
+ while (tre_ring->rp != tre_ring->wp) {
+ struct mhi_buf_info *buf_info = buf_ring->rp;
+
+ if (mhi_chan->dir == DMA_TO_DEVICE)
+ atomic_dec(&mhi_cntrl->pending_pkts);
+
+ if (!buf_info->pre_mapped)
+ mhi_cntrl->unmap_single(mhi_cntrl, buf_info);
+
+ mhi_del_ring_element(mhi_cntrl, buf_ring);
+ mhi_del_ring_element(mhi_cntrl, tre_ring);
+
+ if (mhi_chan->pre_alloc) {
+ kfree(buf_info->cb_buf);
+ } else {
+ result.buf_addr = buf_info->cb_buf;
+ mhi_chan->xfer_cb(mhi_chan->mhi_dev, &result);
+ }
+ }
+}
+
+void mhi_reset_chan(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan)
+{
+ struct mhi_event *mhi_event;
+ struct mhi_event_ctxt *er_ctxt;
+ int chan = mhi_chan->chan;
+
+ /* Nothing to reset, client doesn't queue buffers */
+ if (mhi_chan->offload_ch)
+ return;
+
+ read_lock_bh(&mhi_cntrl->pm_lock);
+ mhi_event = &mhi_cntrl->mhi_event[mhi_chan->er_index];
+ er_ctxt = &mhi_cntrl->mhi_ctxt->er_ctxt[mhi_chan->er_index];
+
+ mhi_mark_stale_events(mhi_cntrl, mhi_event, er_ctxt, chan);
+
+ mhi_reset_data_chan(mhi_cntrl, mhi_chan);
+
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+}
+
+/* Move channel to start state */
+int mhi_prepare_for_transfer(struct mhi_device *mhi_dev)
+{
+ int ret, dir;
+ struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
+ struct mhi_chan *mhi_chan;
+
+ for (dir = 0; dir < 2; dir++) {
+ mhi_chan = dir ? mhi_dev->dl_chan : mhi_dev->ul_chan;
+ if (!mhi_chan)
+ continue;
+
+ ret = mhi_prepare_channel(mhi_cntrl, mhi_chan);
+ if (ret)
+ goto error_open_chan;
+ }
+
+ return 0;
+
+error_open_chan:
+ for (--dir; dir >= 0; dir--) {
+ mhi_chan = dir ? mhi_dev->dl_chan : mhi_dev->ul_chan;
+ if (!mhi_chan)
+ continue;
+
+ __mhi_unprepare_channel(mhi_cntrl, mhi_chan);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(mhi_prepare_for_transfer);
+
+void mhi_unprepare_from_transfer(struct mhi_device *mhi_dev)
+{
+ struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
+ struct mhi_chan *mhi_chan;
+ int dir;
+
+ for (dir = 0; dir < 2; dir++) {
+ mhi_chan = dir ? mhi_dev->ul_chan : mhi_dev->dl_chan;
+ if (!mhi_chan)
+ continue;
+
+ __mhi_unprepare_channel(mhi_cntrl, mhi_chan);
+ }
+}
+EXPORT_SYMBOL_GPL(mhi_unprepare_from_transfer);
+
+int mhi_poll(struct mhi_device *mhi_dev, u32 budget)
+{
+ struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
+ struct mhi_chan *mhi_chan = mhi_dev->dl_chan;
+ struct mhi_event *mhi_event = &mhi_cntrl->mhi_event[mhi_chan->er_index];
+ int ret;
+
+ spin_lock_bh(&mhi_event->lock);
+ ret = mhi_event->process_event(mhi_cntrl, mhi_event, budget);
+ spin_unlock_bh(&mhi_event->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(mhi_poll);
diff --git a/drivers/bus/mhi/host/pci_generic.c b/drivers/bus/mhi/host/pci_generic.c
new file mode 100644
index 000000000000..e3df838c3c80
--- /dev/null
+++ b/drivers/bus/mhi/host/pci_generic.c
@@ -0,0 +1,345 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * MHI PCI driver - MHI over PCI controller driver
+ *
+ * This module is a generic driver for registering MHI-over-PCI devices,
+ * such as PCIe QCOM modems.
+ *
+ * Copyright (C) 2020 Linaro Ltd <loic.poulain@...aro.org>
+ */
+
+#include <linux/device.h>
+#include <linux/mhi.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+
+#define MHI_PCI_DEFAULT_BAR_NUM 0
+
+/**
+ * struct mhi_pci_dev_info - MHI PCI device specific information
+ * @config: MHI controller configuration
+ * @name: name of the PCI module
+ * @fw: firmware path (if any)
+ * @edl: emergency download mode firmware path (if any)
+ * @bar_num: PCI base address register to use for MHI MMIO register space
+ * @dma_data_width: DMA transfer word size (32 or 64 bits)
+ */
+struct mhi_pci_dev_info {
+ const struct mhi_controller_config *config;
+ const char *name;
+ const char *fw;
+ const char *edl;
+ unsigned int bar_num;
+ unsigned int dma_data_width;
+};
+
+#define MHI_CHANNEL_CONFIG_UL(ch_num, ch_name, el_count, ev_ring) \
+ { \
+ .num = ch_num, \
+ .name = ch_name, \
+ .num_elements = el_count, \
+ .event_ring = ev_ring, \
+ .dir = DMA_TO_DEVICE, \
+ .ee_mask = BIT(MHI_EE_AMSS), \
+ .pollcfg = 0, \
+ .doorbell = MHI_DB_BRST_DISABLE, \
+ .lpm_notify = false, \
+ .offload_channel = false, \
+ .doorbell_mode_switch = false, \
+ } \
+
+#define MHI_CHANNEL_CONFIG_DL(ch_num, ch_name, el_count, ev_ring) \
+ { \
+ .num = ch_num, \
+ .name = ch_name, \
+ .num_elements = el_count, \
+ .event_ring = ev_ring, \
+ .dir = DMA_FROM_DEVICE, \
+ .ee_mask = BIT(MHI_EE_AMSS), \
+ .pollcfg = 0, \
+ .doorbell = MHI_DB_BRST_DISABLE, \
+ .lpm_notify = false, \
+ .offload_channel = false, \
+ .doorbell_mode_switch = false, \
+ }
+
+#define MHI_EVENT_CONFIG_CTRL(ev_ring) \
+ { \
+ .num_elements = 64, \
+ .irq_moderation_ms = 0, \
+ .irq = (ev_ring) + 1, \
+ .priority = 1, \
+ .mode = MHI_DB_BRST_DISABLE, \
+ .data_type = MHI_ER_CTRL, \
+ .hardware_event = false, \
+ .client_managed = false, \
+ .offload_channel = false, \
+ }
+
+#define MHI_EVENT_CONFIG_DATA(ev_ring) \
+ { \
+ .num_elements = 128, \
+ .irq_moderation_ms = 5, \
+ .irq = (ev_ring) + 1, \
+ .priority = 1, \
+ .mode = MHI_DB_BRST_DISABLE, \
+ .data_type = MHI_ER_DATA, \
+ .hardware_event = false, \
+ .client_managed = false, \
+ .offload_channel = false, \
+ }
+
+#define MHI_EVENT_CONFIG_HW_DATA(ev_ring, ch_num) \
+ { \
+ .num_elements = 128, \
+ .irq_moderation_ms = 5, \
+ .irq = (ev_ring) + 1, \
+ .priority = 1, \
+ .mode = MHI_DB_BRST_DISABLE, \
+ .data_type = MHI_ER_DATA, \
+ .hardware_event = true, \
+ .client_managed = false, \
+ .offload_channel = false, \
+ .channel = ch_num, \
+ }
+
+static const struct mhi_channel_config modem_qcom_v1_mhi_channels[] = {
+ MHI_CHANNEL_CONFIG_UL(12, "MBIM", 4, 0),
+ MHI_CHANNEL_CONFIG_DL(13, "MBIM", 4, 0),
+ MHI_CHANNEL_CONFIG_UL(14, "QMI", 4, 0),
+ MHI_CHANNEL_CONFIG_DL(15, "QMI", 4, 0),
+ MHI_CHANNEL_CONFIG_UL(20, "IPCR", 8, 0),
+ MHI_CHANNEL_CONFIG_DL(21, "IPCR", 8, 0),
+ MHI_CHANNEL_CONFIG_UL(100, "IP_HW0", 128, 1),
+ MHI_CHANNEL_CONFIG_DL(101, "IP_HW0", 128, 2),
+};
+
+static const struct mhi_event_config modem_qcom_v1_mhi_events[] = {
+ /* first ring is control+data ring */
+ MHI_EVENT_CONFIG_CTRL(0),
+ /* Hardware channels request dedicated hardware event rings */
+ MHI_EVENT_CONFIG_HW_DATA(1, 100),
+ MHI_EVENT_CONFIG_HW_DATA(2, 101)
+};
+
+static const struct mhi_controller_config modem_qcom_v1_mhiv_config = {
+ .max_channels = 128,
+ .timeout_ms = 5000,
+ .num_channels = ARRAY_SIZE(modem_qcom_v1_mhi_channels),
+ .ch_cfg = modem_qcom_v1_mhi_channels,
+ .num_events = ARRAY_SIZE(modem_qcom_v1_mhi_events),
+ .event_cfg = modem_qcom_v1_mhi_events,
+};
+
+static const struct mhi_pci_dev_info mhi_qcom_sdx55_info = {
+ .name = "qcom-sdx55m",
+ .fw = "qcom/sdx55m/sbl1.mbn",
+ .edl = "qcom/sdx55m/edl.mbn",
+ .config = &modem_qcom_v1_mhiv_config,
+ .bar_num = MHI_PCI_DEFAULT_BAR_NUM,
+ .dma_data_width = 32
+};
+
+static const struct pci_device_id mhi_pci_id_table[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_QCOM, 0x0306),
+ .driver_data = (kernel_ulong_t) &mhi_qcom_sdx55_info },
+ { }
+};
+MODULE_DEVICE_TABLE(pci, mhi_pci_id_table);
+
+static int mhi_pci_read_reg(struct mhi_controller *mhi_cntrl,
+ void __iomem *addr, u32 *out)
+{
+ *out = readl(addr);
+ return 0;
+}
+
+static void mhi_pci_write_reg(struct mhi_controller *mhi_cntrl,
+ void __iomem *addr, u32 val)
+{
+ writel(val, addr);
+}
+
+static void mhi_pci_status_cb(struct mhi_controller *mhi_cntrl,
+ enum mhi_callback cb)
+{
+ /* Nothing to do for now */
+}
+
+static int mhi_pci_claim(struct mhi_controller *mhi_cntrl,
+ unsigned int bar_num, u64 dma_mask)
+{
+ struct pci_dev *pdev = to_pci_dev(mhi_cntrl->cntrl_dev);
+ int err;
+
+ err = pci_assign_resource(pdev, bar_num);
+ if (err)
+ return err;
+
+ err = pcim_enable_device(pdev);
+ if (err) {
+ dev_err(&pdev->dev, "failed to enable pci device: %d\n", err);
+ return err;
+ }
+
+ err = pcim_iomap_regions(pdev, 1 << bar_num, pci_name(pdev));
+ if (err) {
+ dev_err(&pdev->dev, "failed to map pci region: %d\n", err);
+ return err;
+ }
+ mhi_cntrl->regs = pcim_iomap_table(pdev)[bar_num];
+
+ err = pci_set_dma_mask(pdev, dma_mask);
+ if (err) {
+ dev_err(&pdev->dev, "Cannot set proper DMA mask\n");
+ return err;
+ }
+
+ err = pci_set_consistent_dma_mask(pdev, dma_mask);
+ if (err) {
+ dev_err(&pdev->dev, "set consistent dma mask failed\n");
+ return err;
+ }
+
+ pci_set_master(pdev);
+
+ return 0;
+}
+
+static int mhi_pci_get_irqs(struct mhi_controller *mhi_cntrl,
+ const struct mhi_controller_config *mhi_cntrl_config)
+{
+ struct pci_dev *pdev = to_pci_dev(mhi_cntrl->cntrl_dev);
+ int nr_vectors, i;
+ int *irq;
+
+ /*
+ * Alloc one MSI vector for BHI + one vector per event ring, ideally...
+ * No explicit pci_free_irq_vectors required, done by pcim_release.
+ */
+ mhi_cntrl->nr_irqs = 1 + mhi_cntrl_config->num_events;
+
+ nr_vectors = pci_alloc_irq_vectors(pdev, 1, mhi_cntrl->nr_irqs, PCI_IRQ_MSI);
+ if (nr_vectors < 0) {
+ dev_err(&pdev->dev, "Error allocating MSI vectors %d\n",
+ nr_vectors);
+ return nr_vectors;
+ }
+
+ if (nr_vectors < mhi_cntrl->nr_irqs) {
+ dev_warn(&pdev->dev, "Not enough MSI vectors (%d/%d), use shared MSI\n",
+ nr_vectors, mhi_cntrl_config->num_events);
+ }
+
+ irq = devm_kcalloc(&pdev->dev, mhi_cntrl->nr_irqs, sizeof(int), GFP_KERNEL);
+ if (!irq)
+ return -ENOMEM;
+
+ for (i = 0; i < mhi_cntrl->nr_irqs; i++) {
+ int vector = i >= nr_vectors ? (nr_vectors - 1) : i;
+
+ irq[i] = pci_irq_vector(pdev, vector);
+ }
+
+ mhi_cntrl->irq = irq;
+
+ return 0;
+}
+
+static int mhi_pci_runtime_get(struct mhi_controller *mhi_cntrl)
+{
+ /* no PM for now */
+ return 0;
+}
+
+static void mhi_pci_runtime_put(struct mhi_controller *mhi_cntrl)
+{
+ /* no PM for now */
+}
+
+static int mhi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ const struct mhi_pci_dev_info *info = (struct mhi_pci_dev_info *) id->driver_data;
+ const struct mhi_controller_config *mhi_cntrl_config;
+ struct mhi_controller *mhi_cntrl;
+ int err;
+
+ dev_dbg(&pdev->dev, "MHI PCI device found: %s\n", info->name);
+
+ mhi_cntrl = mhi_alloc_controller();
+ if (!mhi_cntrl)
+ return -ENOMEM;
+
+ mhi_cntrl_config = info->config;
+ mhi_cntrl->cntrl_dev = &pdev->dev;
+ mhi_cntrl->iova_start = 0;
+ mhi_cntrl->iova_stop = DMA_BIT_MASK(info->dma_data_width);
+ mhi_cntrl->fw_image = info->fw;
+ mhi_cntrl->edl_image = info->edl;
+
+ mhi_cntrl->read_reg = mhi_pci_read_reg;
+ mhi_cntrl->write_reg = mhi_pci_write_reg;
+ mhi_cntrl->status_cb = mhi_pci_status_cb;
+ mhi_cntrl->runtime_get = mhi_pci_runtime_get;
+ mhi_cntrl->runtime_put = mhi_pci_runtime_put;
+
+ err = mhi_pci_claim(mhi_cntrl, info->bar_num, DMA_BIT_MASK(info->dma_data_width));
+ if (err)
+ goto err_release;
+
+ err = mhi_pci_get_irqs(mhi_cntrl, mhi_cntrl_config);
+ if (err)
+ goto err_release;
+
+ pci_set_drvdata(pdev, mhi_cntrl);
+
+ err = mhi_register_controller(mhi_cntrl, mhi_cntrl_config);
+ if (err)
+ goto err_release;
+
+ /* MHI bus does not power up the controller by default */
+ err = mhi_prepare_for_power_up(mhi_cntrl);
+ if (err) {
+ dev_err(&pdev->dev, "failed to prepare MHI controller\n");
+ goto err_unregister;
+ }
+
+ err = mhi_sync_power_up(mhi_cntrl);
+ if (err) {
+ dev_err(&pdev->dev, "failed to power up MHI controller\n");
+ goto err_unprepare;
+ }
+
+ return 0;
+
+err_unprepare:
+ mhi_unprepare_after_power_down(mhi_cntrl);
+err_unregister:
+ mhi_unregister_controller(mhi_cntrl);
+err_release:
+ mhi_free_controller(mhi_cntrl);
+
+ return err;
+}
+
+static void mhi_pci_remove(struct pci_dev *pdev)
+{
+ struct mhi_controller *mhi_cntrl = pci_get_drvdata(pdev);
+
+ mhi_power_down(mhi_cntrl, true);
+ mhi_unprepare_after_power_down(mhi_cntrl);
+ mhi_unregister_controller(mhi_cntrl);
+ mhi_free_controller(mhi_cntrl);
+}
+
+static struct pci_driver mhi_pci_driver = {
+ .name = "mhi-pci-generic",
+ .id_table = mhi_pci_id_table,
+ .probe = mhi_pci_probe,
+ .remove = mhi_pci_remove
+};
+module_pci_driver(mhi_pci_driver);
+
+MODULE_AUTHOR("Loic Poulain <loic.poulain@...aro.org>");
+MODULE_DESCRIPTION("Modem Host Interface (MHI) PCI controller driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/bus/mhi/host/pm.c b/drivers/bus/mhi/host/pm.c
new file mode 100644
index 000000000000..7d69b740b9f9
--- /dev/null
+++ b/drivers/bus/mhi/host/pm.c
@@ -0,0 +1,1157 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-direction.h>
+#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/mhi.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/wait.h>
+#include "internal.h"
+
+/*
+ * Not all MHI state transitions are synchronous. Transitions like Linkdown,
+ * SYS_ERR, and shutdown can happen anytime asynchronously. This function will
+ * transition to a new state only if we're allowed to.
+ *
+ * Priority increases as we go down. For instance, from any state in L0, the
+ * transition can be made to states in L1, L2 and L3. A notable exception to
+ * this rule is state DISABLE. From DISABLE state we can only transition to
+ * POR state. Also, while in L2 state, user cannot jump back to previous
+ * L1 or L0 states.
+ *
+ * Valid transitions:
+ * L0: DISABLE <--> POR
+ * POR <--> POR
+ * POR -> M0 -> M2 --> M0
+ * POR -> FW_DL_ERR
+ * FW_DL_ERR <--> FW_DL_ERR
+ * M0 <--> M0
+ * M0 -> FW_DL_ERR
+ * M0 -> M3_ENTER -> M3 -> M3_EXIT --> M0
+ * L1: SYS_ERR_DETECT -> SYS_ERR_PROCESS --> POR
+ * L2: SHUTDOWN_PROCESS -> DISABLE
+ * L3: LD_ERR_FATAL_DETECT <--> LD_ERR_FATAL_DETECT
+ * LD_ERR_FATAL_DETECT -> SHUTDOWN_PROCESS
+ */
+static struct mhi_pm_transitions const dev_state_transitions[] = {
+ /* L0 States */
+ {
+ MHI_PM_DISABLE,
+ MHI_PM_POR
+ },
+ {
+ MHI_PM_POR,
+ MHI_PM_POR | MHI_PM_DISABLE | MHI_PM_M0 |
+ MHI_PM_SYS_ERR_DETECT | MHI_PM_SHUTDOWN_PROCESS |
+ MHI_PM_LD_ERR_FATAL_DETECT | MHI_PM_FW_DL_ERR
+ },
+ {
+ MHI_PM_M0,
+ MHI_PM_M0 | MHI_PM_M2 | MHI_PM_M3_ENTER |
+ MHI_PM_SYS_ERR_DETECT | MHI_PM_SHUTDOWN_PROCESS |
+ MHI_PM_LD_ERR_FATAL_DETECT | MHI_PM_FW_DL_ERR
+ },
+ {
+ MHI_PM_M2,
+ MHI_PM_M0 | MHI_PM_SYS_ERR_DETECT | MHI_PM_SHUTDOWN_PROCESS |
+ MHI_PM_LD_ERR_FATAL_DETECT
+ },
+ {
+ MHI_PM_M3_ENTER,
+ MHI_PM_M3 | MHI_PM_SYS_ERR_DETECT | MHI_PM_SHUTDOWN_PROCESS |
+ MHI_PM_LD_ERR_FATAL_DETECT
+ },
+ {
+ MHI_PM_M3,
+ MHI_PM_M3_EXIT | MHI_PM_SYS_ERR_DETECT |
+ MHI_PM_SHUTDOWN_PROCESS | MHI_PM_LD_ERR_FATAL_DETECT
+ },
+ {
+ MHI_PM_M3_EXIT,
+ MHI_PM_M0 | MHI_PM_SYS_ERR_DETECT | MHI_PM_SHUTDOWN_PROCESS |
+ MHI_PM_LD_ERR_FATAL_DETECT
+ },
+ {
+ MHI_PM_FW_DL_ERR,
+ MHI_PM_FW_DL_ERR | MHI_PM_SYS_ERR_DETECT |
+ MHI_PM_SHUTDOWN_PROCESS | MHI_PM_LD_ERR_FATAL_DETECT
+ },
+ /* L1 States */
+ {
+ MHI_PM_SYS_ERR_DETECT,
+ MHI_PM_SYS_ERR_PROCESS | MHI_PM_SHUTDOWN_PROCESS |
+ MHI_PM_LD_ERR_FATAL_DETECT
+ },
+ {
+ MHI_PM_SYS_ERR_PROCESS,
+ MHI_PM_POR | MHI_PM_SHUTDOWN_PROCESS |
+ MHI_PM_LD_ERR_FATAL_DETECT
+ },
+ /* L2 States */
+ {
+ MHI_PM_SHUTDOWN_PROCESS,
+ MHI_PM_DISABLE | MHI_PM_LD_ERR_FATAL_DETECT
+ },
+ /* L3 States */
+ {
+ MHI_PM_LD_ERR_FATAL_DETECT,
+ MHI_PM_LD_ERR_FATAL_DETECT | MHI_PM_SHUTDOWN_PROCESS
+ },
+};
+
+enum mhi_pm_state __must_check mhi_tryset_pm_state(struct mhi_controller *mhi_cntrl,
+ enum mhi_pm_state state)
+{
+ unsigned long cur_state = mhi_cntrl->pm_state;
+ int index = find_last_bit(&cur_state, 32);
+
+ if (unlikely(index >= ARRAY_SIZE(dev_state_transitions)))
+ return cur_state;
+
+ if (unlikely(dev_state_transitions[index].from_state != cur_state))
+ return cur_state;
+
+ if (unlikely(!(dev_state_transitions[index].to_states & state)))
+ return cur_state;
+
+ mhi_cntrl->pm_state = state;
+ return mhi_cntrl->pm_state;
+}
+
+void mhi_set_mhi_state(struct mhi_controller *mhi_cntrl, enum mhi_state state)
+{
+ if (state == MHI_STATE_RESET) {
+ mhi_write_reg_field(mhi_cntrl, mhi_cntrl->regs, MHICTRL,
+ MHICTRL_RESET_MASK, MHICTRL_RESET_SHIFT, 1);
+ } else {
+ mhi_write_reg_field(mhi_cntrl, mhi_cntrl->regs, MHICTRL,
+ MHICTRL_MHISTATE_MASK,
+ MHICTRL_MHISTATE_SHIFT, state);
+ }
+}
+
+/* NOP for backward compatibility, host allowed to ring DB in M2 state */
+static void mhi_toggle_dev_wake_nop(struct mhi_controller *mhi_cntrl)
+{
+}
+
+static void mhi_toggle_dev_wake(struct mhi_controller *mhi_cntrl)
+{
+ mhi_cntrl->wake_get(mhi_cntrl, false);
+ mhi_cntrl->wake_put(mhi_cntrl, true);
+}
+
+/* Handle device ready state transition */
+int mhi_ready_state_transition(struct mhi_controller *mhi_cntrl)
+{
+ void __iomem *base = mhi_cntrl->regs;
+ struct mhi_event *mhi_event;
+ enum mhi_pm_state cur_state;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ u32 reset = 1, ready = 0;
+ int ret, i;
+
+ /* Wait for RESET to be cleared and READY bit to be set by the device */
+ wait_event_timeout(mhi_cntrl->state_event,
+ MHI_PM_IN_FATAL_STATE(mhi_cntrl->pm_state) ||
+ mhi_read_reg_field(mhi_cntrl, base, MHICTRL,
+ MHICTRL_RESET_MASK,
+ MHICTRL_RESET_SHIFT, &reset) ||
+ mhi_read_reg_field(mhi_cntrl, base, MHISTATUS,
+ MHISTATUS_READY_MASK,
+ MHISTATUS_READY_SHIFT, &ready) ||
+ (!reset && ready),
+ msecs_to_jiffies(mhi_cntrl->timeout_ms));
+
+ /* Check if device entered error state */
+ if (MHI_PM_IN_FATAL_STATE(mhi_cntrl->pm_state)) {
+ dev_err(dev, "Device link is not accessible\n");
+ return -EIO;
+ }
+
+ /* Timeout if device did not transition to ready state */
+ if (reset || !ready) {
+ dev_err(dev, "Device Ready timeout\n");
+ return -ETIMEDOUT;
+ }
+
+ dev_dbg(dev, "Device in READY State\n");
+ write_lock_irq(&mhi_cntrl->pm_lock);
+ cur_state = mhi_tryset_pm_state(mhi_cntrl, MHI_PM_POR);
+ mhi_cntrl->dev_state = MHI_STATE_READY;
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+
+ if (cur_state != MHI_PM_POR) {
+ dev_err(dev, "Error moving to state %s from %s\n",
+ to_mhi_pm_state_str(MHI_PM_POR),
+ to_mhi_pm_state_str(cur_state));
+ return -EIO;
+ }
+
+ read_lock_bh(&mhi_cntrl->pm_lock);
+ if (!MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state)) {
+ dev_err(dev, "Device registers not accessible\n");
+ goto error_mmio;
+ }
+
+ /* Configure MMIO registers */
+ ret = mhi_init_mmio(mhi_cntrl);
+ if (ret) {
+ dev_err(dev, "Error configuring MMIO registers\n");
+ goto error_mmio;
+ }
+
+ /* Add elements to all SW event rings */
+ mhi_event = mhi_cntrl->mhi_event;
+ for (i = 0; i < mhi_cntrl->total_ev_rings; i++, mhi_event++) {
+ struct mhi_ring *ring = &mhi_event->ring;
+
+ /* Skip if this is an offload or HW event */
+ if (mhi_event->offload_ev || mhi_event->hw_ring)
+ continue;
+
+ ring->wp = ring->base + ring->len - ring->el_size;
+ *ring->ctxt_wp = ring->iommu_base + ring->len - ring->el_size;
+ /* Update all cores */
+ smp_wmb();
+
+ /* Ring the event ring db */
+ spin_lock_irq(&mhi_event->lock);
+ mhi_ring_er_db(mhi_event);
+ spin_unlock_irq(&mhi_event->lock);
+ }
+
+ /* Set MHI to M0 state */
+ mhi_set_mhi_state(mhi_cntrl, MHI_STATE_M0);
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+
+ return 0;
+
+error_mmio:
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+
+ return -EIO;
+}
+
+int mhi_pm_m0_transition(struct mhi_controller *mhi_cntrl)
+{
+ enum mhi_pm_state cur_state;
+ struct mhi_chan *mhi_chan;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ int i;
+
+ write_lock_irq(&mhi_cntrl->pm_lock);
+ mhi_cntrl->dev_state = MHI_STATE_M0;
+ cur_state = mhi_tryset_pm_state(mhi_cntrl, MHI_PM_M0);
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+ if (unlikely(cur_state != MHI_PM_M0)) {
+ dev_err(dev, "Unable to transition to M0 state\n");
+ return -EIO;
+ }
+ mhi_cntrl->M0++;
+
+ /* Wake up the device */
+ read_lock_bh(&mhi_cntrl->pm_lock);
+ mhi_cntrl->wake_get(mhi_cntrl, true);
+
+ /* Ring all event rings and CMD ring only if we're in mission mode */
+ if (MHI_IN_MISSION_MODE(mhi_cntrl->ee)) {
+ struct mhi_event *mhi_event = mhi_cntrl->mhi_event;
+ struct mhi_cmd *mhi_cmd =
+ &mhi_cntrl->mhi_cmd[PRIMARY_CMD_RING];
+
+ for (i = 0; i < mhi_cntrl->total_ev_rings; i++, mhi_event++) {
+ if (mhi_event->offload_ev)
+ continue;
+
+ spin_lock_irq(&mhi_event->lock);
+ mhi_ring_er_db(mhi_event);
+ spin_unlock_irq(&mhi_event->lock);
+ }
+
+ /* Only ring primary cmd ring if ring is not empty */
+ spin_lock_irq(&mhi_cmd->lock);
+ if (mhi_cmd->ring.rp != mhi_cmd->ring.wp)
+ mhi_ring_cmd_db(mhi_cntrl, mhi_cmd);
+ spin_unlock_irq(&mhi_cmd->lock);
+ }
+
+ /* Ring channel DB registers */
+ mhi_chan = mhi_cntrl->mhi_chan;
+ for (i = 0; i < mhi_cntrl->max_chan; i++, mhi_chan++) {
+ struct mhi_ring *tre_ring = &mhi_chan->tre_ring;
+
+ if (mhi_chan->db_cfg.reset_req) {
+ write_lock_irq(&mhi_chan->lock);
+ mhi_chan->db_cfg.db_mode = true;
+ write_unlock_irq(&mhi_chan->lock);
+ }
+
+ read_lock_irq(&mhi_chan->lock);
+
+ /* Only ring DB if ring is not empty */
+ if (tre_ring->base && tre_ring->wp != tre_ring->rp &&
+ mhi_chan->ch_state == MHI_CH_STATE_ENABLED)
+ mhi_ring_chan_db(mhi_cntrl, mhi_chan);
+ read_unlock_irq(&mhi_chan->lock);
+ }
+
+ mhi_cntrl->wake_put(mhi_cntrl, false);
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+ wake_up_all(&mhi_cntrl->state_event);
+
+ return 0;
+}
+
+/*
+ * After receiving the MHI state change event from the device indicating the
+ * transition to M1 state, the host can transition the device to M2 state
+ * for keeping it in low power state.
+ */
+void mhi_pm_m1_transition(struct mhi_controller *mhi_cntrl)
+{
+ enum mhi_pm_state state;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+
+ write_lock_irq(&mhi_cntrl->pm_lock);
+ state = mhi_tryset_pm_state(mhi_cntrl, MHI_PM_M2);
+ if (state == MHI_PM_M2) {
+ mhi_set_mhi_state(mhi_cntrl, MHI_STATE_M2);
+ mhi_cntrl->dev_state = MHI_STATE_M2;
+
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+
+ mhi_cntrl->M2++;
+ wake_up_all(&mhi_cntrl->state_event);
+
+ /* If there are any pending resources, exit M2 immediately */
+ if (unlikely(atomic_read(&mhi_cntrl->pending_pkts) ||
+ atomic_read(&mhi_cntrl->dev_wake))) {
+ dev_dbg(dev,
+ "Exiting M2, pending_pkts: %d dev_wake: %d\n",
+ atomic_read(&mhi_cntrl->pending_pkts),
+ atomic_read(&mhi_cntrl->dev_wake));
+ read_lock_bh(&mhi_cntrl->pm_lock);
+ mhi_cntrl->wake_get(mhi_cntrl, true);
+ mhi_cntrl->wake_put(mhi_cntrl, true);
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+ } else {
+ mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_IDLE);
+ }
+ } else {
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+ }
+}
+
+/* MHI M3 completion handler */
+int mhi_pm_m3_transition(struct mhi_controller *mhi_cntrl)
+{
+ enum mhi_pm_state state;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+
+ write_lock_irq(&mhi_cntrl->pm_lock);
+ mhi_cntrl->dev_state = MHI_STATE_M3;
+ state = mhi_tryset_pm_state(mhi_cntrl, MHI_PM_M3);
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+ if (state != MHI_PM_M3) {
+ dev_err(dev, "Unable to transition to M3 state\n");
+ return -EIO;
+ }
+
+ mhi_cntrl->M3++;
+ wake_up_all(&mhi_cntrl->state_event);
+
+ return 0;
+}
+
+/* Handle device Mission Mode transition */
+static int mhi_pm_mission_mode_transition(struct mhi_controller *mhi_cntrl)
+{
+ struct mhi_event *mhi_event;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ enum mhi_ee_type current_ee = mhi_cntrl->ee;
+ int i, ret;
+
+ dev_dbg(dev, "Processing Mission Mode transition\n");
+
+ write_lock_irq(&mhi_cntrl->pm_lock);
+ if (MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state))
+ mhi_cntrl->ee = mhi_get_exec_env(mhi_cntrl);
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+
+ if (!MHI_IN_MISSION_MODE(mhi_cntrl->ee))
+ return -EIO;
+
+ wake_up_all(&mhi_cntrl->state_event);
+
+ device_for_each_child(&mhi_cntrl->mhi_dev->dev, ¤t_ee,
+ mhi_destroy_device);
+ mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_EE_MISSION_MODE);
+
+ /* Force MHI to be in M0 state before continuing */
+ ret = __mhi_device_get_sync(mhi_cntrl);
+ if (ret)
+ return ret;
+
+ read_lock_bh(&mhi_cntrl->pm_lock);
+
+ if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
+ ret = -EIO;
+ goto error_mission_mode;
+ }
+
+ /* Add elements to all HW event rings */
+ mhi_event = mhi_cntrl->mhi_event;
+ for (i = 0; i < mhi_cntrl->total_ev_rings; i++, mhi_event++) {
+ struct mhi_ring *ring = &mhi_event->ring;
+
+ if (mhi_event->offload_ev || !mhi_event->hw_ring)
+ continue;
+
+ ring->wp = ring->base + ring->len - ring->el_size;
+ *ring->ctxt_wp = ring->iommu_base + ring->len - ring->el_size;
+ /* Update to all cores */
+ smp_wmb();
+
+ spin_lock_irq(&mhi_event->lock);
+ if (MHI_DB_ACCESS_VALID(mhi_cntrl))
+ mhi_ring_er_db(mhi_event);
+ spin_unlock_irq(&mhi_event->lock);
+ }
+
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+
+ /*
+ * The MHI devices are only created when the client device switches its
+ * Execution Environment (EE) to either SBL or AMSS states
+ */
+ mhi_create_devices(mhi_cntrl);
+
+ read_lock_bh(&mhi_cntrl->pm_lock);
+
+error_mission_mode:
+ mhi_cntrl->wake_put(mhi_cntrl, false);
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+
+ return ret;
+}
+
+/* Handle SYS_ERR and Shutdown transitions */
+static void mhi_pm_disable_transition(struct mhi_controller *mhi_cntrl,
+ enum mhi_pm_state transition_state)
+{
+ enum mhi_pm_state cur_state, prev_state;
+ struct mhi_event *mhi_event;
+ struct mhi_cmd_ctxt *cmd_ctxt;
+ struct mhi_cmd *mhi_cmd;
+ struct mhi_event_ctxt *er_ctxt;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ int ret, i;
+
+ dev_dbg(dev, "Transitioning from PM state: %s to: %s\n",
+ to_mhi_pm_state_str(mhi_cntrl->pm_state),
+ to_mhi_pm_state_str(transition_state));
+
+ /* We must notify MHI control driver so it can clean up first */
+ if (transition_state == MHI_PM_SYS_ERR_PROCESS)
+ mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_SYS_ERROR);
+
+ mutex_lock(&mhi_cntrl->pm_mutex);
+ write_lock_irq(&mhi_cntrl->pm_lock);
+ prev_state = mhi_cntrl->pm_state;
+ cur_state = mhi_tryset_pm_state(mhi_cntrl, transition_state);
+ if (cur_state == transition_state) {
+ mhi_cntrl->ee = MHI_EE_DISABLE_TRANSITION;
+ mhi_cntrl->dev_state = MHI_STATE_RESET;
+ }
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+
+ /* Wake up threads waiting for state transition */
+ wake_up_all(&mhi_cntrl->state_event);
+
+ if (cur_state != transition_state) {
+ dev_err(dev, "Failed to transition to state: %s from: %s\n",
+ to_mhi_pm_state_str(transition_state),
+ to_mhi_pm_state_str(cur_state));
+ mutex_unlock(&mhi_cntrl->pm_mutex);
+ return;
+ }
+
+ /* Trigger MHI RESET so that the device will not access host memory */
+ if (MHI_REG_ACCESS_VALID(prev_state)) {
+ u32 in_reset = -1;
+ unsigned long timeout = msecs_to_jiffies(mhi_cntrl->timeout_ms);
+
+ dev_dbg(dev, "Triggering MHI Reset in device\n");
+ mhi_set_mhi_state(mhi_cntrl, MHI_STATE_RESET);
+
+ /* Wait for the reset bit to be cleared by the device */
+ ret = wait_event_timeout(mhi_cntrl->state_event,
+ mhi_read_reg_field(mhi_cntrl,
+ mhi_cntrl->regs,
+ MHICTRL,
+ MHICTRL_RESET_MASK,
+ MHICTRL_RESET_SHIFT,
+ &in_reset) ||
+ !in_reset, timeout);
+ if ((!ret || in_reset) && cur_state == MHI_PM_SYS_ERR_PROCESS) {
+ dev_err(dev, "Device failed to exit MHI Reset state\n");
+ mutex_unlock(&mhi_cntrl->pm_mutex);
+ return;
+ }
+
+ /*
+ * Device will clear BHI_INTVEC as a part of RESET processing,
+ * hence re-program it
+ */
+ mhi_write_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_INTVEC, 0);
+ }
+
+ dev_dbg(dev,
+ "Waiting for all pending event ring processing to complete\n");
+ mhi_event = mhi_cntrl->mhi_event;
+ for (i = 0; i < mhi_cntrl->total_ev_rings; i++, mhi_event++) {
+ if (mhi_event->offload_ev)
+ continue;
+ tasklet_kill(&mhi_event->task);
+ }
+
+ /* Release lock and wait for all pending threads to complete */
+ mutex_unlock(&mhi_cntrl->pm_mutex);
+ dev_dbg(dev, "Waiting for all pending threads to complete\n");
+ wake_up_all(&mhi_cntrl->state_event);
+
+ dev_dbg(dev, "Reset all active channels and remove MHI devices\n");
+ device_for_each_child(mhi_cntrl->cntrl_dev, NULL, mhi_destroy_device);
+
+ mutex_lock(&mhi_cntrl->pm_mutex);
+
+ WARN_ON(atomic_read(&mhi_cntrl->dev_wake));
+ WARN_ON(atomic_read(&mhi_cntrl->pending_pkts));
+
+ /* Reset the ev rings and cmd rings */
+ dev_dbg(dev, "Resetting EV CTXT and CMD CTXT\n");
+ mhi_cmd = mhi_cntrl->mhi_cmd;
+ cmd_ctxt = mhi_cntrl->mhi_ctxt->cmd_ctxt;
+ for (i = 0; i < NR_OF_CMD_RINGS; i++, mhi_cmd++, cmd_ctxt++) {
+ struct mhi_ring *ring = &mhi_cmd->ring;
+
+ ring->rp = ring->base;
+ ring->wp = ring->base;
+ cmd_ctxt->rp = cmd_ctxt->rbase;
+ cmd_ctxt->wp = cmd_ctxt->rbase;
+ }
+
+ mhi_event = mhi_cntrl->mhi_event;
+ er_ctxt = mhi_cntrl->mhi_ctxt->er_ctxt;
+ for (i = 0; i < mhi_cntrl->total_ev_rings; i++, er_ctxt++,
+ mhi_event++) {
+ struct mhi_ring *ring = &mhi_event->ring;
+
+ /* Skip offload events */
+ if (mhi_event->offload_ev)
+ continue;
+
+ ring->rp = ring->base;
+ ring->wp = ring->base;
+ er_ctxt->rp = er_ctxt->rbase;
+ er_ctxt->wp = er_ctxt->rbase;
+ }
+
+ if (cur_state == MHI_PM_SYS_ERR_PROCESS) {
+ mhi_ready_state_transition(mhi_cntrl);
+ } else {
+ /* Move to disable state */
+ write_lock_irq(&mhi_cntrl->pm_lock);
+ cur_state = mhi_tryset_pm_state(mhi_cntrl, MHI_PM_DISABLE);
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+ if (unlikely(cur_state != MHI_PM_DISABLE))
+ dev_err(dev, "Error moving from PM state: %s to: %s\n",
+ to_mhi_pm_state_str(cur_state),
+ to_mhi_pm_state_str(MHI_PM_DISABLE));
+ }
+
+ dev_dbg(dev, "Exiting with PM state: %s, MHI state: %s\n",
+ to_mhi_pm_state_str(mhi_cntrl->pm_state),
+ TO_MHI_STATE_STR(mhi_cntrl->dev_state));
+
+ mutex_unlock(&mhi_cntrl->pm_mutex);
+}
+
+/* Queue a new work item and schedule work */
+int mhi_queue_state_transition(struct mhi_controller *mhi_cntrl,
+ enum dev_st_transition state)
+{
+ struct state_transition *item = kmalloc(sizeof(*item), GFP_ATOMIC);
+ unsigned long flags;
+
+ if (!item)
+ return -ENOMEM;
+
+ item->state = state;
+ spin_lock_irqsave(&mhi_cntrl->transition_lock, flags);
+ list_add_tail(&item->node, &mhi_cntrl->transition_list);
+ spin_unlock_irqrestore(&mhi_cntrl->transition_lock, flags);
+
+ schedule_work(&mhi_cntrl->st_worker);
+
+ return 0;
+}
+
+/* SYS_ERR worker */
+void mhi_pm_sys_err_handler(struct mhi_controller *mhi_cntrl)
+{
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+
+ /* skip if controller supports RDDM */
+ if (mhi_cntrl->rddm_image) {
+ dev_dbg(dev, "Controller supports RDDM, skip SYS_ERROR\n");
+ return;
+ }
+
+ mhi_queue_state_transition(mhi_cntrl, DEV_ST_TRANSITION_SYS_ERR);
+}
+
+/* Device State Transition worker */
+void mhi_pm_st_worker(struct work_struct *work)
+{
+ struct state_transition *itr, *tmp;
+ LIST_HEAD(head);
+ struct mhi_controller *mhi_cntrl = container_of(work,
+ struct mhi_controller,
+ st_worker);
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+
+ spin_lock_irq(&mhi_cntrl->transition_lock);
+ list_splice_tail_init(&mhi_cntrl->transition_list, &head);
+ spin_unlock_irq(&mhi_cntrl->transition_lock);
+
+ list_for_each_entry_safe(itr, tmp, &head, node) {
+ list_del(&itr->node);
+ dev_dbg(dev, "Handling state transition: %s\n",
+ TO_DEV_STATE_TRANS_STR(itr->state));
+
+ switch (itr->state) {
+ case DEV_ST_TRANSITION_PBL:
+ write_lock_irq(&mhi_cntrl->pm_lock);
+ if (MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state))
+ mhi_cntrl->ee = mhi_get_exec_env(mhi_cntrl);
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+ if (MHI_IN_PBL(mhi_cntrl->ee))
+ mhi_fw_load_handler(mhi_cntrl);
+ break;
+ case DEV_ST_TRANSITION_SBL:
+ write_lock_irq(&mhi_cntrl->pm_lock);
+ mhi_cntrl->ee = MHI_EE_SBL;
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+ /*
+ * The MHI devices are only created when the client
+ * device switches its Execution Environment (EE) to
+ * either SBL or AMSS states
+ */
+ mhi_create_devices(mhi_cntrl);
+ break;
+ case DEV_ST_TRANSITION_MISSION_MODE:
+ mhi_pm_mission_mode_transition(mhi_cntrl);
+ break;
+ case DEV_ST_TRANSITION_READY:
+ mhi_ready_state_transition(mhi_cntrl);
+ break;
+ case DEV_ST_TRANSITION_SYS_ERR:
+ mhi_pm_disable_transition
+ (mhi_cntrl, MHI_PM_SYS_ERR_PROCESS);
+ break;
+ case DEV_ST_TRANSITION_DISABLE:
+ mhi_pm_disable_transition
+ (mhi_cntrl, MHI_PM_SHUTDOWN_PROCESS);
+ break;
+ default:
+ break;
+ }
+ kfree(itr);
+ }
+}
+
+int mhi_pm_suspend(struct mhi_controller *mhi_cntrl)
+{
+ struct mhi_chan *itr, *tmp;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ enum mhi_pm_state new_state;
+ int ret;
+
+ if (mhi_cntrl->pm_state == MHI_PM_DISABLE)
+ return -EINVAL;
+
+ if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state))
+ return -EIO;
+
+ /* Return busy if there are any pending resources */
+ if (atomic_read(&mhi_cntrl->dev_wake) ||
+ atomic_read(&mhi_cntrl->pending_pkts))
+ return -EBUSY;
+
+ /* Take MHI out of M2 state */
+ read_lock_bh(&mhi_cntrl->pm_lock);
+ mhi_cntrl->wake_get(mhi_cntrl, false);
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+
+ ret = wait_event_timeout(mhi_cntrl->state_event,
+ mhi_cntrl->dev_state == MHI_STATE_M0 ||
+ mhi_cntrl->dev_state == MHI_STATE_M1 ||
+ MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state),
+ msecs_to_jiffies(mhi_cntrl->timeout_ms));
+
+ read_lock_bh(&mhi_cntrl->pm_lock);
+ mhi_cntrl->wake_put(mhi_cntrl, false);
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+
+ if (!ret || MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
+ dev_err(dev,
+ "Could not enter M0/M1 state");
+ return -EIO;
+ }
+
+ write_lock_irq(&mhi_cntrl->pm_lock);
+
+ if (atomic_read(&mhi_cntrl->dev_wake) ||
+ atomic_read(&mhi_cntrl->pending_pkts)) {
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+ return -EBUSY;
+ }
+
+ dev_info(dev, "Allowing M3 transition\n");
+ new_state = mhi_tryset_pm_state(mhi_cntrl, MHI_PM_M3_ENTER);
+ if (new_state != MHI_PM_M3_ENTER) {
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+ dev_err(dev,
+ "Error setting to PM state: %s from: %s\n",
+ to_mhi_pm_state_str(MHI_PM_M3_ENTER),
+ to_mhi_pm_state_str(mhi_cntrl->pm_state));
+ return -EIO;
+ }
+
+ /* Set MHI to M3 and wait for completion */
+ mhi_set_mhi_state(mhi_cntrl, MHI_STATE_M3);
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+ dev_info(dev, "Wait for M3 completion\n");
+
+ ret = wait_event_timeout(mhi_cntrl->state_event,
+ mhi_cntrl->dev_state == MHI_STATE_M3 ||
+ MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state),
+ msecs_to_jiffies(mhi_cntrl->timeout_ms));
+
+ if (!ret || MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
+ dev_err(dev,
+ "Did not enter M3 state, MHI state: %s, PM state: %s\n",
+ TO_MHI_STATE_STR(mhi_cntrl->dev_state),
+ to_mhi_pm_state_str(mhi_cntrl->pm_state));
+ return -EIO;
+ }
+
+ /* Notify clients about entering LPM */
+ list_for_each_entry_safe(itr, tmp, &mhi_cntrl->lpm_chans, node) {
+ mutex_lock(&itr->mutex);
+ if (itr->mhi_dev)
+ mhi_notify(itr->mhi_dev, MHI_CB_LPM_ENTER);
+ mutex_unlock(&itr->mutex);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mhi_pm_suspend);
+
+int mhi_pm_resume(struct mhi_controller *mhi_cntrl)
+{
+ struct mhi_chan *itr, *tmp;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ enum mhi_pm_state cur_state;
+ int ret;
+
+ dev_info(dev, "Entered with PM state: %s, MHI state: %s\n",
+ to_mhi_pm_state_str(mhi_cntrl->pm_state),
+ TO_MHI_STATE_STR(mhi_cntrl->dev_state));
+
+ if (mhi_cntrl->pm_state == MHI_PM_DISABLE)
+ return 0;
+
+ if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state))
+ return -EIO;
+
+ /* Notify clients about exiting LPM */
+ list_for_each_entry_safe(itr, tmp, &mhi_cntrl->lpm_chans, node) {
+ mutex_lock(&itr->mutex);
+ if (itr->mhi_dev)
+ mhi_notify(itr->mhi_dev, MHI_CB_LPM_EXIT);
+ mutex_unlock(&itr->mutex);
+ }
+
+ write_lock_irq(&mhi_cntrl->pm_lock);
+ cur_state = mhi_tryset_pm_state(mhi_cntrl, MHI_PM_M3_EXIT);
+ if (cur_state != MHI_PM_M3_EXIT) {
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+ dev_info(dev,
+ "Error setting to PM state: %s from: %s\n",
+ to_mhi_pm_state_str(MHI_PM_M3_EXIT),
+ to_mhi_pm_state_str(mhi_cntrl->pm_state));
+ return -EIO;
+ }
+
+ /* Set MHI to M0 and wait for completion */
+ mhi_set_mhi_state(mhi_cntrl, MHI_STATE_M0);
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+
+ ret = wait_event_timeout(mhi_cntrl->state_event,
+ mhi_cntrl->dev_state == MHI_STATE_M0 ||
+ mhi_cntrl->dev_state == MHI_STATE_M2 ||
+ MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state),
+ msecs_to_jiffies(mhi_cntrl->timeout_ms));
+
+ if (!ret || MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
+ dev_err(dev,
+ "Did not enter M0 state, MHI state: %s, PM state: %s\n",
+ TO_MHI_STATE_STR(mhi_cntrl->dev_state),
+ to_mhi_pm_state_str(mhi_cntrl->pm_state));
+ return -EIO;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mhi_pm_resume);
+
+int __mhi_device_get_sync(struct mhi_controller *mhi_cntrl)
+{
+ int ret;
+
+ /* Wake up the device */
+ read_lock_bh(&mhi_cntrl->pm_lock);
+ mhi_cntrl->wake_get(mhi_cntrl, true);
+ if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state))
+ mhi_trigger_resume(mhi_cntrl);
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+
+ ret = wait_event_timeout(mhi_cntrl->state_event,
+ mhi_cntrl->pm_state == MHI_PM_M0 ||
+ MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state),
+ msecs_to_jiffies(mhi_cntrl->timeout_ms));
+
+ if (!ret || MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
+ read_lock_bh(&mhi_cntrl->pm_lock);
+ mhi_cntrl->wake_put(mhi_cntrl, false);
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+/* Assert device wake db */
+static void mhi_assert_dev_wake(struct mhi_controller *mhi_cntrl, bool force)
+{
+ unsigned long flags;
+
+ /*
+ * If force flag is set, then increment the wake count value and
+ * ring wake db
+ */
+ if (unlikely(force)) {
+ spin_lock_irqsave(&mhi_cntrl->wlock, flags);
+ atomic_inc(&mhi_cntrl->dev_wake);
+ if (MHI_WAKE_DB_FORCE_SET_VALID(mhi_cntrl->pm_state) &&
+ !mhi_cntrl->wake_set) {
+ mhi_write_db(mhi_cntrl, mhi_cntrl->wake_db, 1);
+ mhi_cntrl->wake_set = true;
+ }
+ spin_unlock_irqrestore(&mhi_cntrl->wlock, flags);
+ } else {
+ /*
+ * If resources are already requested, then just increment
+ * the wake count value and return
+ */
+ if (likely(atomic_add_unless(&mhi_cntrl->dev_wake, 1, 0)))
+ return;
+
+ spin_lock_irqsave(&mhi_cntrl->wlock, flags);
+ if ((atomic_inc_return(&mhi_cntrl->dev_wake) == 1) &&
+ MHI_WAKE_DB_SET_VALID(mhi_cntrl->pm_state) &&
+ !mhi_cntrl->wake_set) {
+ mhi_write_db(mhi_cntrl, mhi_cntrl->wake_db, 1);
+ mhi_cntrl->wake_set = true;
+ }
+ spin_unlock_irqrestore(&mhi_cntrl->wlock, flags);
+ }
+}
+
+/* De-assert device wake db */
+static void mhi_deassert_dev_wake(struct mhi_controller *mhi_cntrl,
+ bool override)
+{
+ unsigned long flags;
+
+ /*
+ * Only continue if there is a single resource, else just decrement
+ * and return
+ */
+ if (likely(atomic_add_unless(&mhi_cntrl->dev_wake, -1, 1)))
+ return;
+
+ spin_lock_irqsave(&mhi_cntrl->wlock, flags);
+ if ((atomic_dec_return(&mhi_cntrl->dev_wake) == 0) &&
+ MHI_WAKE_DB_CLEAR_VALID(mhi_cntrl->pm_state) && !override &&
+ mhi_cntrl->wake_set) {
+ mhi_write_db(mhi_cntrl, mhi_cntrl->wake_db, 0);
+ mhi_cntrl->wake_set = false;
+ }
+ spin_unlock_irqrestore(&mhi_cntrl->wlock, flags);
+}
+
+int mhi_async_power_up(struct mhi_controller *mhi_cntrl)
+{
+ enum mhi_state state;
+ enum mhi_ee_type current_ee;
+ enum dev_st_transition next_state;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ u32 val;
+ int ret;
+
+ dev_info(dev, "Requested to power ON\n");
+
+ if (mhi_cntrl->nr_irqs < 1)
+ return -EINVAL;
+
+ /* Supply default wake routines if not provided by controller driver */
+ if (!mhi_cntrl->wake_get || !mhi_cntrl->wake_put ||
+ !mhi_cntrl->wake_toggle) {
+ mhi_cntrl->wake_get = mhi_assert_dev_wake;
+ mhi_cntrl->wake_put = mhi_deassert_dev_wake;
+ mhi_cntrl->wake_toggle = (mhi_cntrl->db_access & MHI_PM_M2) ?
+ mhi_toggle_dev_wake_nop : mhi_toggle_dev_wake;
+ }
+
+ mutex_lock(&mhi_cntrl->pm_mutex);
+ mhi_cntrl->pm_state = MHI_PM_DISABLE;
+
+ if (!mhi_cntrl->pre_init) {
+ /* Setup device context */
+ ret = mhi_init_dev_ctxt(mhi_cntrl);
+ if (ret)
+ goto error_dev_ctxt;
+ }
+
+ ret = mhi_init_irq_setup(mhi_cntrl);
+ if (ret)
+ goto error_setup_irq;
+
+ /* Setup BHI offset & INTVEC */
+ write_lock_irq(&mhi_cntrl->pm_lock);
+ ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->regs, BHIOFF, &val);
+ if (ret) {
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+ goto error_bhi_offset;
+ }
+
+ mhi_cntrl->bhi = mhi_cntrl->regs + val;
+
+ /* Setup BHIE offset */
+ if (mhi_cntrl->fbc_download) {
+ ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->regs, BHIEOFF, &val);
+ if (ret) {
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+ dev_err(dev, "Error reading BHIE offset\n");
+ goto error_bhi_offset;
+ }
+
+ mhi_cntrl->bhie = mhi_cntrl->regs + val;
+ }
+
+ mhi_write_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_INTVEC, 0);
+ mhi_cntrl->pm_state = MHI_PM_POR;
+ mhi_cntrl->ee = MHI_EE_MAX;
+ current_ee = mhi_get_exec_env(mhi_cntrl);
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+
+ /* Confirm that the device is in valid exec env */
+ if (!MHI_IN_PBL(current_ee) && current_ee != MHI_EE_AMSS) {
+ dev_err(dev, "Not a valid EE for power on\n");
+ ret = -EIO;
+ goto error_bhi_offset;
+ }
+
+ state = mhi_get_mhi_state(mhi_cntrl);
+ if (state == MHI_STATE_SYS_ERR) {
+ mhi_set_mhi_state(mhi_cntrl, MHI_STATE_RESET);
+ ret = wait_event_timeout(mhi_cntrl->state_event,
+ MHI_PM_IN_FATAL_STATE(mhi_cntrl->pm_state) ||
+ mhi_read_reg_field(mhi_cntrl,
+ mhi_cntrl->regs,
+ MHICTRL,
+ MHICTRL_RESET_MASK,
+ MHICTRL_RESET_SHIFT,
+ &val) ||
+ !val,
+ msecs_to_jiffies(mhi_cntrl->timeout_ms));
+ if (!ret) {
+ ret = -EIO;
+ dev_info(dev, "Failed to reset MHI due to syserr state\n");
+ goto error_bhi_offset;
+ }
+
+ /*
+ * device cleares INTVEC as part of RESET processing,
+ * re-program it
+ */
+ mhi_write_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_INTVEC, 0);
+ }
+
+ /* Transition to next state */
+ next_state = MHI_IN_PBL(current_ee) ?
+ DEV_ST_TRANSITION_PBL : DEV_ST_TRANSITION_READY;
+
+ mhi_queue_state_transition(mhi_cntrl, next_state);
+
+ mutex_unlock(&mhi_cntrl->pm_mutex);
+
+ dev_info(dev, "Power on setup success\n");
+
+ return 0;
+
+error_bhi_offset:
+ mhi_deinit_free_irq(mhi_cntrl);
+
+error_setup_irq:
+ if (!mhi_cntrl->pre_init)
+ mhi_deinit_dev_ctxt(mhi_cntrl);
+
+error_dev_ctxt:
+ mutex_unlock(&mhi_cntrl->pm_mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(mhi_async_power_up);
+
+void mhi_power_down(struct mhi_controller *mhi_cntrl, bool graceful)
+{
+ enum mhi_pm_state cur_state;
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+
+ /* If it's not a graceful shutdown, force MHI to linkdown state */
+ if (!graceful) {
+ mutex_lock(&mhi_cntrl->pm_mutex);
+ write_lock_irq(&mhi_cntrl->pm_lock);
+ cur_state = mhi_tryset_pm_state(mhi_cntrl,
+ MHI_PM_LD_ERR_FATAL_DETECT);
+ write_unlock_irq(&mhi_cntrl->pm_lock);
+ mutex_unlock(&mhi_cntrl->pm_mutex);
+ if (cur_state != MHI_PM_LD_ERR_FATAL_DETECT)
+ dev_dbg(dev, "Failed to move to state: %s from: %s\n",
+ to_mhi_pm_state_str(MHI_PM_LD_ERR_FATAL_DETECT),
+ to_mhi_pm_state_str(mhi_cntrl->pm_state));
+ }
+
+ mhi_queue_state_transition(mhi_cntrl, DEV_ST_TRANSITION_DISABLE);
+
+ /* Wait for shutdown to complete */
+ flush_work(&mhi_cntrl->st_worker);
+
+ mhi_deinit_free_irq(mhi_cntrl);
+
+ if (!mhi_cntrl->pre_init) {
+ /* Free all allocated resources */
+ if (mhi_cntrl->fbc_image) {
+ mhi_free_bhie_table(mhi_cntrl, mhi_cntrl->fbc_image);
+ mhi_cntrl->fbc_image = NULL;
+ }
+ mhi_deinit_dev_ctxt(mhi_cntrl);
+ }
+}
+EXPORT_SYMBOL_GPL(mhi_power_down);
+
+int mhi_sync_power_up(struct mhi_controller *mhi_cntrl)
+{
+ int ret = mhi_async_power_up(mhi_cntrl);
+
+ if (ret)
+ return ret;
+
+ wait_event_timeout(mhi_cntrl->state_event,
+ MHI_IN_MISSION_MODE(mhi_cntrl->ee) ||
+ MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state),
+ msecs_to_jiffies(mhi_cntrl->timeout_ms));
+
+ ret = (MHI_IN_MISSION_MODE(mhi_cntrl->ee)) ? 0 : -ETIMEDOUT;
+ if (ret)
+ mhi_power_down(mhi_cntrl, false);
+
+ return ret;
+}
+EXPORT_SYMBOL(mhi_sync_power_up);
+
+int mhi_force_rddm_mode(struct mhi_controller *mhi_cntrl)
+{
+ struct device *dev = &mhi_cntrl->mhi_dev->dev;
+ int ret;
+
+ /* Check if device is already in RDDM */
+ if (mhi_cntrl->ee == MHI_EE_RDDM)
+ return 0;
+
+ dev_dbg(dev, "Triggering SYS_ERR to force RDDM state\n");
+ mhi_set_mhi_state(mhi_cntrl, MHI_STATE_SYS_ERR);
+
+ /* Wait for RDDM event */
+ ret = wait_event_timeout(mhi_cntrl->state_event,
+ mhi_cntrl->ee == MHI_EE_RDDM,
+ msecs_to_jiffies(mhi_cntrl->timeout_ms));
+ ret = ret ? 0 : -EIO;
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(mhi_force_rddm_mode);
+
+void mhi_device_get(struct mhi_device *mhi_dev)
+{
+ struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
+
+ mhi_dev->dev_wake++;
+ read_lock_bh(&mhi_cntrl->pm_lock);
+ if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state))
+ mhi_trigger_resume(mhi_cntrl);
+
+ mhi_cntrl->wake_get(mhi_cntrl, true);
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+}
+EXPORT_SYMBOL_GPL(mhi_device_get);
+
+int mhi_device_get_sync(struct mhi_device *mhi_dev)
+{
+ struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
+ int ret;
+
+ ret = __mhi_device_get_sync(mhi_cntrl);
+ if (!ret)
+ mhi_dev->dev_wake++;
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(mhi_device_get_sync);
+
+void mhi_device_put(struct mhi_device *mhi_dev)
+{
+ struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
+
+ mhi_dev->dev_wake--;
+ read_lock_bh(&mhi_cntrl->pm_lock);
+ if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state))
+ mhi_trigger_resume(mhi_cntrl);
+
+ mhi_cntrl->wake_put(mhi_cntrl, false);
+ read_unlock_bh(&mhi_cntrl->pm_lock);
+}
+EXPORT_SYMBOL_GPL(mhi_device_put);
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index 4b1641fe30db..fcfe4d16cc14 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -2078,6 +2078,8 @@ static int sysc_reset(struct sysc *ddata)
sysc_val = sysc_read_sysconfig(ddata);
sysc_val |= sysc_mask;
sysc_write(ddata, sysc_offset, sysc_val);
+ /* Flush posted write */
+ sysc_val = sysc_read_sysconfig(ddata);
}
if (ddata->cfg.srst_udelay)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index ffd8f5601e28..e25c3387bcf8 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -1517,15 +1517,15 @@ static int amdgpu_cs_wait_all_fences(struct amdgpu_device *adev,
continue;
r = dma_fence_wait_timeout(fence, true, timeout);
+ if (r > 0 && fence->error)
+ r = fence->error;
+
dma_fence_put(fence);
if (r < 0)
return r;
if (r == 0)
break;
-
- if (fence->error)
- return fence->error;
}
memset(wait, 0, sizeof(*wait));
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 8445bb7ae06a..3b4724d60868 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2155,6 +2155,7 @@ struct amdgpu_bo_va *amdgpu_vm_bo_add(struct amdgpu_device *adev,
amdgpu_vm_bo_base_init(&bo_va->base, vm, bo);
bo_va->ref_count = 1;
+ bo_va->last_pt_update = dma_fence_get_stub();
INIT_LIST_HEAD(&bo_va->valids);
INIT_LIST_HEAD(&bo_va->invalids);
@@ -2867,7 +2868,8 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm,
vm->update_funcs = &amdgpu_vm_cpu_funcs;
else
vm->update_funcs = &amdgpu_vm_sdma_funcs;
- vm->last_update = NULL;
+
+ vm->last_update = dma_fence_get_stub();
vm->last_unlocked = dma_fence_get_stub();
mutex_init(&vm->eviction_lock);
@@ -3042,7 +3044,7 @@ int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm,
vm->update_funcs = &amdgpu_vm_sdma_funcs;
}
dma_fence_put(vm->last_update);
- vm->last_update = NULL;
+ vm->last_update = dma_fence_get_stub();
vm->is_compute_context = true;
if (vm->pasid) {
diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 7b69f81444eb..e40321d79898 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -1010,21 +1010,21 @@ static const struct panel_desc auo_g104sn02 = {
},
};
-static const struct drm_display_mode auo_g121ean01_mode = {
- .clock = 66700,
- .hdisplay = 1280,
- .hsync_start = 1280 + 58,
- .hsync_end = 1280 + 58 + 8,
- .htotal = 1280 + 58 + 8 + 70,
- .vdisplay = 800,
- .vsync_start = 800 + 6,
- .vsync_end = 800 + 6 + 4,
- .vtotal = 800 + 6 + 4 + 10,
+static const struct display_timing auo_g121ean01_timing = {
+ .pixelclock = { 60000000, 74400000, 90000000 },
+ .hactive = { 1280, 1280, 1280 },
+ .hfront_porch = { 20, 50, 100 },
+ .hback_porch = { 20, 50, 100 },
+ .hsync_len = { 30, 100, 200 },
+ .vactive = { 800, 800, 800 },
+ .vfront_porch = { 2, 10, 25 },
+ .vback_porch = { 2, 10, 25 },
+ .vsync_len = { 4, 18, 50 },
};
static const struct panel_desc auo_g121ean01 = {
- .modes = &auo_g121ean01_mode,
- .num_modes = 1,
+ .timings = &auo_g121ean01_timing,
+ .num_timings = 1,
.bpc = 8,
.size = {
.width = 261,
diff --git a/drivers/gpu/drm/radeon/radeon_cs.c b/drivers/gpu/drm/radeon/radeon_cs.c
index a78b60b62caf..87a57e5588a2 100644
--- a/drivers/gpu/drm/radeon/radeon_cs.c
+++ b/drivers/gpu/drm/radeon/radeon_cs.c
@@ -271,7 +271,8 @@ int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data)
{
struct drm_radeon_cs *cs = data;
uint64_t *chunk_array_ptr;
- unsigned size, i;
+ u64 size;
+ unsigned i;
u32 ring = RADEON_CS_RING_GFX;
s32 priority = 0;
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 2b658d820b80..6712d99ad80d 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -582,6 +582,7 @@
#define USB_DEVICE_ID_UGCI_FIGHTING 0x0030
#define USB_VENDOR_ID_HP 0x03f0
+#define USB_PRODUCT_ID_HP_ELITE_PRESENTER_MOUSE_464A 0x464a
#define USB_PRODUCT_ID_HP_LOGITECH_OEM_USB_OPTICAL_MOUSE_0A4A 0x0a4a
#define USB_PRODUCT_ID_HP_LOGITECH_OEM_USB_OPTICAL_MOUSE_0B4A 0x0b4a
#define USB_PRODUCT_ID_HP_PIXART_OEM_USB_OPTICAL_MOUSE 0x134a
diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c
index 9f1fcbea19eb..4229e5de0674 100644
--- a/drivers/hid/hid-quirks.c
+++ b/drivers/hid/hid-quirks.c
@@ -96,6 +96,7 @@ static const struct hid_device_id hid_quirks[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, USB_DEVICE_ID_HOLTEK_ALT_KEYBOARD_A096), HID_QUIRK_NO_INIT_REPORTS },
{ HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, USB_DEVICE_ID_HOLTEK_ALT_KEYBOARD_A293), HID_QUIRK_ALWAYS_POLL },
{ HID_USB_DEVICE(USB_VENDOR_ID_HP, USB_PRODUCT_ID_HP_LOGITECH_OEM_USB_OPTICAL_MOUSE_0A4A), HID_QUIRK_ALWAYS_POLL },
+ { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_HP, USB_PRODUCT_ID_HP_ELITE_PRESENTER_MOUSE_464A), HID_QUIRK_MULTI_INPUT },
{ HID_USB_DEVICE(USB_VENDOR_ID_HP, USB_PRODUCT_ID_HP_LOGITECH_OEM_USB_OPTICAL_MOUSE_0B4A), HID_QUIRK_ALWAYS_POLL },
{ HID_USB_DEVICE(USB_VENDOR_ID_HP, USB_PRODUCT_ID_HP_PIXART_OEM_USB_OPTICAL_MOUSE), HID_QUIRK_ALWAYS_POLL },
{ HID_USB_DEVICE(USB_VENDOR_ID_HP, USB_PRODUCT_ID_HP_PIXART_OEM_USB_OPTICAL_MOUSE_094A), HID_QUIRK_ALWAYS_POLL },
diff --git a/drivers/i2c/busses/i2c-bcm-iproc.c b/drivers/i2c/busses/i2c-bcm-iproc.c
index 35baca2f62c4..a524d2cd1142 100644
--- a/drivers/i2c/busses/i2c-bcm-iproc.c
+++ b/drivers/i2c/busses/i2c-bcm-iproc.c
@@ -242,13 +242,14 @@ static inline u32 iproc_i2c_rd_reg(struct bcm_iproc_i2c_dev *iproc_i2c,
u32 offset)
{
u32 val;
+ unsigned long flags;
if (iproc_i2c->idm_base) {
- spin_lock(&iproc_i2c->idm_lock);
+ spin_lock_irqsave(&iproc_i2c->idm_lock, flags);
writel(iproc_i2c->ape_addr_mask,
iproc_i2c->idm_base + IDM_CTRL_DIRECT_OFFSET);
val = readl(iproc_i2c->base + offset);
- spin_unlock(&iproc_i2c->idm_lock);
+ spin_unlock_irqrestore(&iproc_i2c->idm_lock, flags);
} else {
val = readl(iproc_i2c->base + offset);
}
@@ -259,12 +260,14 @@ static inline u32 iproc_i2c_rd_reg(struct bcm_iproc_i2c_dev *iproc_i2c,
static inline void iproc_i2c_wr_reg(struct bcm_iproc_i2c_dev *iproc_i2c,
u32 offset, u32 val)
{
+ unsigned long flags;
+
if (iproc_i2c->idm_base) {
- spin_lock(&iproc_i2c->idm_lock);
+ spin_lock_irqsave(&iproc_i2c->idm_lock, flags);
writel(iproc_i2c->ape_addr_mask,
iproc_i2c->idm_base + IDM_CTRL_DIRECT_OFFSET);
writel(val, iproc_i2c->base + offset);
- spin_unlock(&iproc_i2c->idm_lock);
+ spin_unlock_irqrestore(&iproc_i2c->idm_lock, flags);
} else {
writel(val, iproc_i2c->base + offset);
}
diff --git a/drivers/i2c/busses/i2c-designware-master.c b/drivers/i2c/busses/i2c-designware-master.c
index 2871cf2ee8b4..106080b25e81 100644
--- a/drivers/i2c/busses/i2c-designware-master.c
+++ b/drivers/i2c/busses/i2c-designware-master.c
@@ -432,8 +432,19 @@ i2c_dw_read(struct dw_i2c_dev *dev)
regmap_read(dev->map, DW_IC_DATA_CMD, &tmp);
/* Ensure length byte is a valid value */
- if (flags & I2C_M_RECV_LEN &&
- tmp <= I2C_SMBUS_BLOCK_MAX && tmp > 0) {
+ if (flags & I2C_M_RECV_LEN) {
+ /*
+ * if IC_EMPTYFIFO_HOLD_MASTER_EN is set, which cannot be
+ * detected from the registers, the controller can be
+ * disabled if the STOP bit is set. But it is only set
+ * after receiving block data response length in
+ * I2C_FUNC_SMBUS_BLOCK_DATA case. That needs to read
+ * another byte with STOP bit set when the block data
+ * response length is invalid to complete the transaction.
+ */
+ if (!tmp || tmp > I2C_SMBUS_BLOCK_MAX)
+ tmp = 1;
+
len = i2c_dw_recv_len(dev, tmp);
}
*buf++ = tmp;
diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig
index 267553386c71..2ed303aa7de3 100644
--- a/drivers/iio/Kconfig
+++ b/drivers/iio/Kconfig
@@ -70,6 +70,7 @@ config IIO_TRIGGERED_EVENT
source "drivers/iio/accel/Kconfig"
source "drivers/iio/adc/Kconfig"
+source "drivers/iio/addac/Kconfig"
source "drivers/iio/afe/Kconfig"
source "drivers/iio/amplifiers/Kconfig"
source "drivers/iio/chemical/Kconfig"
diff --git a/drivers/iio/Makefile b/drivers/iio/Makefile
index 1712011c0f4a..d6690e449cce 100644
--- a/drivers/iio/Makefile
+++ b/drivers/iio/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_IIO_TRIGGERED_EVENT) += industrialio-triggered-event.o
obj-y += accel/
obj-y += adc/
+obj-y += addac/
obj-y += afe/
obj-y += amplifiers/
obj-y += buffer/
diff --git a/drivers/iio/adc/stx104.c b/drivers/iio/adc/stx104.c
index 55bd2dc514e9..b658a75d4e3a 100644
--- a/drivers/iio/adc/stx104.c
+++ b/drivers/iio/adc/stx104.c
@@ -15,7 +15,9 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
+#include <linux/mutex.h>
#include <linux/spinlock.h>
+#include <linux/types.h>
#define STX104_OUT_CHAN(chan) { \
.type = IIO_VOLTAGE, \
@@ -44,14 +46,38 @@ static unsigned int num_stx104;
module_param_hw_array(base, uint, ioport, &num_stx104, 0);
MODULE_PARM_DESC(base, "Apex Embedded Systems STX104 base addresses");
+/**
+ * struct stx104_reg - device register structure
+ * @ssr_ad: Software Strobe Register and ADC Data
+ * @achan: ADC Channel
+ * @dio: Digital I/O
+ * @dac: DAC Channels
+ * @cir_asr: Clear Interrupts and ADC Status
+ * @acr: ADC Control
+ * @pccr_fsh: Pacer Clock Control and FIFO Status MSB
+ * @acfg: ADC Configuration
+ */
+struct stx104_reg {
+ u16 ssr_ad;
+ u8 achan;
+ u8 dio;
+ u16 dac[2];
+ u8 cir_asr;
+ u8 acr;
+ u8 pccr_fsh;
+ u8 acfg;
+};
+
/**
* struct stx104_iio - IIO device private data structure
+ * @lock: synchronization lock to prevent I/O race conditions
* @chan_out_states: channels' output states
- * @base: base port address of the IIO device
+ * @reg: I/O address offset for the device registers
*/
struct stx104_iio {
+ struct mutex lock;
unsigned int chan_out_states[STX104_NUM_OUT_CHAN];
- unsigned int base;
+ struct stx104_reg __iomem *reg;
};
/**
@@ -64,7 +90,7 @@ struct stx104_iio {
struct stx104_gpio {
struct gpio_chip chip;
spinlock_t lock;
- unsigned int base;
+ u8 __iomem *base;
unsigned int out_state;
};
@@ -72,6 +98,7 @@ static int stx104_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan, int *val, int *val2, long mask)
{
struct stx104_iio *const priv = iio_priv(indio_dev);
+ struct stx104_reg __iomem *const reg = priv->reg;
unsigned int adc_config;
int adbu;
int gain;
@@ -79,7 +106,7 @@ static int stx104_read_raw(struct iio_dev *indio_dev,
switch (mask) {
case IIO_CHAN_INFO_HARDWAREGAIN:
/* get gain configuration */
- adc_config = inb(priv->base + 11);
+ adc_config = ioread8(®->acfg);
gain = adc_config & 0x3;
*val = 1 << gain;
@@ -90,25 +117,31 @@ static int stx104_read_raw(struct iio_dev *indio_dev,
return IIO_VAL_INT;
}
+ mutex_lock(&priv->lock);
+
/* select ADC channel */
- outb(chan->channel | (chan->channel << 4), priv->base + 2);
+ iowrite8(chan->channel | (chan->channel << 4), ®->achan);
+
+ /* trigger ADC sample capture by writing to the 8-bit
+ * Software Strobe Register and wait for completion
+ */
+ iowrite8(0, ®->ssr_ad);
+ while (ioread8(®->cir_asr) & BIT(7));
- /* trigger ADC sample capture and wait for completion */
- outb(0, priv->base);
- while (inb(priv->base + 8) & BIT(7));
+ *val = ioread16(®->ssr_ad);
- *val = inw(priv->base);
+ mutex_unlock(&priv->lock);
return IIO_VAL_INT;
case IIO_CHAN_INFO_OFFSET:
/* get ADC bipolar/unipolar configuration */
- adc_config = inb(priv->base + 11);
+ adc_config = ioread8(®->acfg);
adbu = !(adc_config & BIT(2));
*val = -32768 * adbu;
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
/* get ADC bipolar/unipolar and gain configuration */
- adc_config = inb(priv->base + 11);
+ adc_config = ioread8(®->acfg);
adbu = !(adc_config & BIT(2));
gain = adc_config & 0x3;
@@ -130,16 +163,16 @@ static int stx104_write_raw(struct iio_dev *indio_dev,
/* Only four gain states (x1, x2, x4, x8) */
switch (val) {
case 1:
- outb(0, priv->base + 11);
+ iowrite8(0, &priv->reg->acfg);
break;
case 2:
- outb(1, priv->base + 11);
+ iowrite8(1, &priv->reg->acfg);
break;
case 4:
- outb(2, priv->base + 11);
+ iowrite8(2, &priv->reg->acfg);
break;
case 8:
- outb(3, priv->base + 11);
+ iowrite8(3, &priv->reg->acfg);
break;
default:
return -EINVAL;
@@ -152,9 +185,12 @@ static int stx104_write_raw(struct iio_dev *indio_dev,
if ((unsigned int)val > 65535)
return -EINVAL;
+ mutex_lock(&priv->lock);
+
priv->chan_out_states[chan->channel] = val;
- outw(val, priv->base + 4 + 2 * chan->channel);
+ iowrite16(val, &priv->reg->dac[chan->channel]);
+ mutex_unlock(&priv->lock);
return 0;
}
return -EINVAL;
@@ -222,7 +258,7 @@ static int stx104_gpio_get(struct gpio_chip *chip, unsigned int offset)
if (offset >= 4)
return -EINVAL;
- return !!(inb(stx104gpio->base) & BIT(offset));
+ return !!(ioread8(stx104gpio->base) & BIT(offset));
}
static int stx104_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
@@ -230,7 +266,7 @@ static int stx104_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
{
struct stx104_gpio *const stx104gpio = gpiochip_get_data(chip);
- *bits = inb(stx104gpio->base);
+ *bits = ioread8(stx104gpio->base);
return 0;
}
@@ -252,7 +288,7 @@ static void stx104_gpio_set(struct gpio_chip *chip, unsigned int offset,
else
stx104gpio->out_state &= ~mask;
- outb(stx104gpio->out_state, stx104gpio->base);
+ iowrite8(stx104gpio->out_state, stx104gpio->base);
spin_unlock_irqrestore(&stx104gpio->lock, flags);
}
@@ -279,7 +315,7 @@ static void stx104_gpio_set_multiple(struct gpio_chip *chip,
stx104gpio->out_state &= ~*mask;
stx104gpio->out_state |= *mask & *bits;
- outb(stx104gpio->out_state, stx104gpio->base);
+ iowrite8(stx104gpio->out_state, stx104gpio->base);
spin_unlock_irqrestore(&stx104gpio->lock, flags);
}
@@ -306,11 +342,16 @@ static int stx104_probe(struct device *dev, unsigned int id)
return -EBUSY;
}
+ priv = iio_priv(indio_dev);
+ priv->reg = devm_ioport_map(dev, base[id], STX104_EXTENT);
+ if (!priv->reg)
+ return -ENOMEM;
+
indio_dev->info = &stx104_info;
indio_dev->modes = INDIO_DIRECT_MODE;
/* determine if differential inputs */
- if (inb(base[id] + 8) & BIT(5)) {
+ if (ioread8(&priv->reg->cir_asr) & BIT(5)) {
indio_dev->num_channels = ARRAY_SIZE(stx104_channels_diff);
indio_dev->channels = stx104_channels_diff;
} else {
@@ -320,18 +361,17 @@ static int stx104_probe(struct device *dev, unsigned int id)
indio_dev->name = dev_name(dev);
- priv = iio_priv(indio_dev);
- priv->base = base[id];
+ mutex_init(&priv->lock);
/* configure device for software trigger operation */
- outb(0, base[id] + 9);
+ iowrite8(0, &priv->reg->acr);
/* initialize gain setting to x1 */
- outb(0, base[id] + 11);
+ iowrite8(0, &priv->reg->acfg);
/* initialize DAC output to 0V */
- outw(0, base[id] + 4);
- outw(0, base[id] + 6);
+ iowrite16(0, &priv->reg->dac[0]);
+ iowrite16(0, &priv->reg->dac[1]);
stx104gpio->chip.label = dev_name(dev);
stx104gpio->chip.parent = dev;
@@ -346,7 +386,7 @@ static int stx104_probe(struct device *dev, unsigned int id)
stx104gpio->chip.get_multiple = stx104_gpio_get_multiple;
stx104gpio->chip.set = stx104_gpio_set;
stx104gpio->chip.set_multiple = stx104_gpio_set_multiple;
- stx104gpio->base = base[id] + 3;
+ stx104gpio->base = &priv->reg->dio;
stx104gpio->out_state = 0x0;
spin_lock_init(&stx104gpio->lock);
diff --git a/drivers/iio/addac/Kconfig b/drivers/iio/addac/Kconfig
new file mode 100644
index 000000000000..2e64d7755d5e
--- /dev/null
+++ b/drivers/iio/addac/Kconfig
@@ -0,0 +1,8 @@
+#
+# ADC DAC drivers
+#
+# When adding new entries keep the list in alphabetical order
+
+menu "Analog to digital and digital to analog converters"
+
+endmenu
diff --git a/drivers/iio/addac/Makefile b/drivers/iio/addac/Makefile
new file mode 100644
index 000000000000..b888b9ee12da
--- /dev/null
+++ b/drivers/iio/addac/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for industrial I/O ADDAC drivers
+#
+
+# When adding new entries keep the list in alphabetical order
diff --git a/drivers/infiniband/hw/mlx5/qpc.c b/drivers/infiniband/hw/mlx5/qpc.c
index c683d7000168..9a306da7f949 100644
--- a/drivers/infiniband/hw/mlx5/qpc.c
+++ b/drivers/infiniband/hw/mlx5/qpc.c
@@ -297,8 +297,7 @@ int mlx5_core_destroy_qp(struct mlx5_ib_dev *dev, struct mlx5_core_qp *qp)
MLX5_SET(destroy_qp_in, in, opcode, MLX5_CMD_OP_DESTROY_QP);
MLX5_SET(destroy_qp_in, in, qpn, qp->qpn);
MLX5_SET(destroy_qp_in, in, uid, qp->uid);
- mlx5_cmd_exec_in(dev->mdev, destroy_qp, in);
- return 0;
+ return mlx5_cmd_exec_in(dev->mdev, destroy_qp, in);
}
int mlx5_core_set_delay_drop(struct mlx5_ib_dev *dev,
@@ -542,14 +541,14 @@ int mlx5_core_xrcd_dealloc(struct mlx5_ib_dev *dev, u32 xrcdn)
return mlx5_cmd_exec_in(dev->mdev, dealloc_xrcd, in);
}
-static void destroy_rq_tracked(struct mlx5_ib_dev *dev, u32 rqn, u16 uid)
+static int destroy_rq_tracked(struct mlx5_ib_dev *dev, u32 rqn, u16 uid)
{
u32 in[MLX5_ST_SZ_DW(destroy_rq_in)] = {};
MLX5_SET(destroy_rq_in, in, opcode, MLX5_CMD_OP_DESTROY_RQ);
MLX5_SET(destroy_rq_in, in, rqn, rqn);
MLX5_SET(destroy_rq_in, in, uid, uid);
- mlx5_cmd_exec_in(dev->mdev, destroy_rq, in);
+ return mlx5_cmd_exec_in(dev->mdev, destroy_rq, in);
}
int mlx5_core_create_rq_tracked(struct mlx5_ib_dev *dev, u32 *in, int inlen,
@@ -580,8 +579,7 @@ int mlx5_core_destroy_rq_tracked(struct mlx5_ib_dev *dev,
struct mlx5_core_qp *rq)
{
destroy_resource_common(dev, rq);
- destroy_rq_tracked(dev, rq->qpn, rq->uid);
- return 0;
+ return destroy_rq_tracked(dev, rq->qpn, rq->uid);
}
static void destroy_sq_tracked(struct mlx5_ib_dev *dev, u32 sqn, u16 uid)
diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c
index 8ada91bdbe4d..fc25b900cef7 100644
--- a/drivers/irqchip/irq-mips-gic.c
+++ b/drivers/irqchip/irq-mips-gic.c
@@ -48,7 +48,7 @@ void __iomem *mips_gic_base;
static DEFINE_PER_CPU_READ_MOSTLY(unsigned long[GIC_MAX_LONGS], pcpu_masks);
-static DEFINE_SPINLOCK(gic_lock);
+static DEFINE_RAW_SPINLOCK(gic_lock);
static struct irq_domain *gic_irq_domain;
static int gic_shared_intrs;
static unsigned int gic_cpu_pin;
@@ -209,7 +209,7 @@ static int gic_set_type(struct irq_data *d, unsigned int type)
irq = GIC_HWIRQ_TO_SHARED(d->hwirq);
- spin_lock_irqsave(&gic_lock, flags);
+ raw_spin_lock_irqsave(&gic_lock, flags);
switch (type & IRQ_TYPE_SENSE_MASK) {
case IRQ_TYPE_EDGE_FALLING:
pol = GIC_POL_FALLING_EDGE;
@@ -249,7 +249,7 @@ static int gic_set_type(struct irq_data *d, unsigned int type)
else
irq_set_chip_handler_name_locked(d, &gic_level_irq_controller,
handle_level_irq, NULL);
- spin_unlock_irqrestore(&gic_lock, flags);
+ raw_spin_unlock_irqrestore(&gic_lock, flags);
return 0;
}
@@ -267,7 +267,7 @@ static int gic_set_affinity(struct irq_data *d, const struct cpumask *cpumask,
return -EINVAL;
/* Assumption : cpumask refers to a single CPU */
- spin_lock_irqsave(&gic_lock, flags);
+ raw_spin_lock_irqsave(&gic_lock, flags);
/* Re-route this IRQ */
write_gic_map_vp(irq, BIT(mips_cm_vp_id(cpu)));
@@ -278,7 +278,7 @@ static int gic_set_affinity(struct irq_data *d, const struct cpumask *cpumask,
set_bit(irq, per_cpu_ptr(pcpu_masks, cpu));
irq_data_update_effective_affinity(d, cpumask_of(cpu));
- spin_unlock_irqrestore(&gic_lock, flags);
+ raw_spin_unlock_irqrestore(&gic_lock, flags);
return IRQ_SET_MASK_OK;
}
@@ -356,12 +356,12 @@ static void gic_mask_local_irq_all_vpes(struct irq_data *d)
cd = irq_data_get_irq_chip_data(d);
cd->mask = false;
- spin_lock_irqsave(&gic_lock, flags);
+ raw_spin_lock_irqsave(&gic_lock, flags);
for_each_online_cpu(cpu) {
write_gic_vl_other(mips_cm_vp_id(cpu));
write_gic_vo_rmask(BIT(intr));
}
- spin_unlock_irqrestore(&gic_lock, flags);
+ raw_spin_unlock_irqrestore(&gic_lock, flags);
}
static void gic_unmask_local_irq_all_vpes(struct irq_data *d)
@@ -374,32 +374,43 @@ static void gic_unmask_local_irq_all_vpes(struct irq_data *d)
cd = irq_data_get_irq_chip_data(d);
cd->mask = true;
- spin_lock_irqsave(&gic_lock, flags);
+ raw_spin_lock_irqsave(&gic_lock, flags);
for_each_online_cpu(cpu) {
write_gic_vl_other(mips_cm_vp_id(cpu));
write_gic_vo_smask(BIT(intr));
}
- spin_unlock_irqrestore(&gic_lock, flags);
+ raw_spin_unlock_irqrestore(&gic_lock, flags);
}
-static void gic_all_vpes_irq_cpu_online(struct irq_data *d)
+static void gic_all_vpes_irq_cpu_online(void)
{
- struct gic_all_vpes_chip_data *cd;
- unsigned int intr;
+ static const unsigned int local_intrs[] = {
+ GIC_LOCAL_INT_TIMER,
+ GIC_LOCAL_INT_PERFCTR,
+ GIC_LOCAL_INT_FDC,
+ };
+ unsigned long flags;
+ int i;
- intr = GIC_HWIRQ_TO_LOCAL(d->hwirq);
- cd = irq_data_get_irq_chip_data(d);
+ raw_spin_lock_irqsave(&gic_lock, flags);
- write_gic_vl_map(mips_gic_vx_map_reg(intr), cd->map);
- if (cd->mask)
- write_gic_vl_smask(BIT(intr));
+ for (i = 0; i < ARRAY_SIZE(local_intrs); i++) {
+ unsigned int intr = local_intrs[i];
+ struct gic_all_vpes_chip_data *cd;
+
+ cd = &gic_all_vpes_chip_data[intr];
+ write_gic_vl_map(mips_gic_vx_map_reg(intr), cd->map);
+ if (cd->mask)
+ write_gic_vl_smask(BIT(intr));
+ }
+
+ raw_spin_unlock_irqrestore(&gic_lock, flags);
}
static struct irq_chip gic_all_vpes_local_irq_controller = {
.name = "MIPS GIC Local",
.irq_mask = gic_mask_local_irq_all_vpes,
.irq_unmask = gic_unmask_local_irq_all_vpes,
- .irq_cpu_online = gic_all_vpes_irq_cpu_online,
};
static void __gic_irq_dispatch(void)
@@ -423,11 +434,11 @@ static int gic_shared_irq_domain_map(struct irq_domain *d, unsigned int virq,
data = irq_get_irq_data(virq);
- spin_lock_irqsave(&gic_lock, flags);
+ raw_spin_lock_irqsave(&gic_lock, flags);
write_gic_map_pin(intr, GIC_MAP_PIN_MAP_TO_PIN | gic_cpu_pin);
write_gic_map_vp(intr, BIT(mips_cm_vp_id(cpu)));
irq_data_update_effective_affinity(data, cpumask_of(cpu));
- spin_unlock_irqrestore(&gic_lock, flags);
+ raw_spin_unlock_irqrestore(&gic_lock, flags);
return 0;
}
@@ -480,6 +491,10 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int virq,
intr = GIC_HWIRQ_TO_LOCAL(hwirq);
map = GIC_MAP_PIN_MAP_TO_PIN | gic_cpu_pin;
+ /*
+ * If adding support for more per-cpu interrupts, keep the the
+ * array in gic_all_vpes_irq_cpu_online() in sync.
+ */
switch (intr) {
case GIC_LOCAL_INT_TIMER:
/* CONFIG_MIPS_CMP workaround (see __gic_init) */
@@ -518,12 +533,12 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int virq,
if (!gic_local_irq_is_routable(intr))
return -EPERM;
- spin_lock_irqsave(&gic_lock, flags);
+ raw_spin_lock_irqsave(&gic_lock, flags);
for_each_online_cpu(cpu) {
write_gic_vl_other(mips_cm_vp_id(cpu));
write_gic_vo_map(mips_gic_vx_map_reg(intr), map);
}
- spin_unlock_irqrestore(&gic_lock, flags);
+ raw_spin_unlock_irqrestore(&gic_lock, flags);
return 0;
}
@@ -710,8 +725,8 @@ static int gic_cpu_startup(unsigned int cpu)
/* Clear all local IRQ masks (ie. disable all local interrupts) */
write_gic_vl_rmask(~0);
- /* Invoke irq_cpu_online callbacks to enable desired interrupts */
- irq_cpu_online();
+ /* Enable desired interrupts */
+ gic_all_vpes_irq_cpu_online();
return 0;
}
diff --git a/drivers/media/platform/mtk-vpu/mtk_vpu.c b/drivers/media/platform/mtk-vpu/mtk_vpu.c
index c62eb212cca9..e7c4b0dd588a 100644
--- a/drivers/media/platform/mtk-vpu/mtk_vpu.c
+++ b/drivers/media/platform/mtk-vpu/mtk_vpu.c
@@ -539,15 +539,17 @@ static int load_requested_vpu(struct mtk_vpu *vpu,
int vpu_load_firmware(struct platform_device *pdev)
{
struct mtk_vpu *vpu;
- struct device *dev = &pdev->dev;
+ struct device *dev;
struct vpu_run *run;
int ret;
if (!pdev) {
- dev_err(dev, "VPU platform device is invalid\n");
+ pr_err("VPU platform device is invalid\n");
return -EINVAL;
}
+ dev = &pdev->dev;
+
vpu = platform_get_drvdata(pdev);
run = &vpu->run;
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index 599b7317b59a..d81baf750aeb 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -1980,14 +1980,14 @@ static void mmc_blk_mq_poll_completion(struct mmc_queue *mq,
mmc_blk_urgent_bkops(mq, mqrq);
}
-static void mmc_blk_mq_dec_in_flight(struct mmc_queue *mq, struct request *req)
+static void mmc_blk_mq_dec_in_flight(struct mmc_queue *mq, enum mmc_issue_type issue_type)
{
unsigned long flags;
bool put_card;
spin_lock_irqsave(&mq->lock, flags);
- mq->in_flight[mmc_issue_type(mq, req)] -= 1;
+ mq->in_flight[issue_type] -= 1;
put_card = (mmc_tot_in_flight(mq) == 0);
@@ -1999,6 +1999,7 @@ static void mmc_blk_mq_dec_in_flight(struct mmc_queue *mq, struct request *req)
static void mmc_blk_mq_post_req(struct mmc_queue *mq, struct request *req)
{
+ enum mmc_issue_type issue_type = mmc_issue_type(mq, req);
struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
struct mmc_request *mrq = &mqrq->brq.mrq;
struct mmc_host *host = mq->card->host;
@@ -2014,7 +2015,7 @@ static void mmc_blk_mq_post_req(struct mmc_queue *mq, struct request *req)
else if (likely(!blk_should_fake_timeout(req->q)))
blk_mq_complete_request(req);
- mmc_blk_mq_dec_in_flight(mq, req);
+ mmc_blk_mq_dec_in_flight(mq, issue_type);
}
void mmc_blk_mq_recovery(struct mmc_queue *mq)
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index 03e2f965a96a..1f46694b2e53 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -513,6 +513,32 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
EXPORT_SYMBOL(mmc_alloc_host);
+static void devm_mmc_host_release(struct device *dev, void *res)
+{
+ mmc_free_host(*(struct mmc_host **)res);
+}
+
+struct mmc_host *devm_mmc_alloc_host(struct device *dev, int extra)
+{
+ struct mmc_host **dr, *host;
+
+ dr = devres_alloc(devm_mmc_host_release, sizeof(*dr), GFP_KERNEL);
+ if (!dr)
+ return ERR_PTR(-ENOMEM);
+
+ host = mmc_alloc_host(extra, dev);
+ if (IS_ERR(host)) {
+ devres_free(dr);
+ return host;
+ }
+
+ *dr = host;
+ devres_add(dev, dr);
+
+ return host;
+}
+EXPORT_SYMBOL(devm_mmc_alloc_host);
+
static int mmc_validate_host_caps(struct mmc_host *host)
{
if (host->caps & MMC_CAP_SDIO_IRQ && !host->ops->enable_sdio_irq) {
diff --git a/drivers/mmc/host/bcm2835.c b/drivers/mmc/host/bcm2835.c
index 8c2361e66277..985079943be7 100644
--- a/drivers/mmc/host/bcm2835.c
+++ b/drivers/mmc/host/bcm2835.c
@@ -1413,8 +1413,8 @@ static int bcm2835_probe(struct platform_device *pdev)
host->max_clk = clk_get_rate(clk);
host->irq = platform_get_irq(pdev, 0);
- if (host->irq <= 0) {
- ret = -EINVAL;
+ if (host->irq < 0) {
+ ret = host->irq;
goto err;
}
diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index e89bd6f4b317..1992eea8b777 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -1122,7 +1122,7 @@ static int meson_mmc_probe(struct platform_device *pdev)
struct mmc_host *mmc;
int ret;
- mmc = mmc_alloc_host(sizeof(struct meson_host), &pdev->dev);
+ mmc = devm_mmc_alloc_host(&pdev->dev, sizeof(struct meson_host));
if (!mmc)
return -ENOMEM;
host = mmc_priv(mmc);
@@ -1138,46 +1138,33 @@ static int meson_mmc_probe(struct platform_device *pdev)
host->vqmmc_enabled = false;
ret = mmc_regulator_get_supply(mmc);
if (ret)
- goto free_host;
+ return ret;
ret = mmc_of_parse(mmc);
- if (ret) {
- if (ret != -EPROBE_DEFER)
- dev_warn(&pdev->dev, "error parsing DT: %d\n", ret);
- goto free_host;
- }
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret, "error parsing DT\n");
host->data = (struct meson_mmc_data *)
of_device_get_match_data(&pdev->dev);
- if (!host->data) {
- ret = -EINVAL;
- goto free_host;
- }
+ if (!host->data)
+ return -EINVAL;
ret = device_reset_optional(&pdev->dev);
- if (ret) {
- dev_err_probe(&pdev->dev, ret, "device reset failed\n");
- goto free_host;
- }
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret, "device reset failed\n");
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
host->regs = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(host->regs)) {
- ret = PTR_ERR(host->regs);
- goto free_host;
- }
+ if (IS_ERR(host->regs))
+ return PTR_ERR(host->regs);
host->irq = platform_get_irq(pdev, 0);
- if (host->irq <= 0) {
- ret = -EINVAL;
- goto free_host;
- }
+ if (host->irq < 0)
+ return host->irq;
host->pinctrl = devm_pinctrl_get(&pdev->dev);
- if (IS_ERR(host->pinctrl)) {
- ret = PTR_ERR(host->pinctrl);
- goto free_host;
- }
+ if (IS_ERR(host->pinctrl))
+ return PTR_ERR(host->pinctrl);
host->pins_clk_gate = pinctrl_lookup_state(host->pinctrl,
"clk-gate");
@@ -1188,14 +1175,12 @@ static int meson_mmc_probe(struct platform_device *pdev)
}
host->core_clk = devm_clk_get(&pdev->dev, "core");
- if (IS_ERR(host->core_clk)) {
- ret = PTR_ERR(host->core_clk);
- goto free_host;
- }
+ if (IS_ERR(host->core_clk))
+ return PTR_ERR(host->core_clk);
ret = clk_prepare_enable(host->core_clk);
if (ret)
- goto free_host;
+ return ret;
ret = meson_mmc_clk_init(host);
if (ret)
@@ -1290,8 +1275,6 @@ static int meson_mmc_probe(struct platform_device *pdev)
clk_disable_unprepare(host->mmc_clk);
err_core_clk:
clk_disable_unprepare(host->core_clk);
-free_host:
- mmc_free_host(mmc);
return ret;
}
@@ -1315,7 +1298,6 @@ static int meson_mmc_remove(struct platform_device *pdev)
clk_disable_unprepare(host->mmc_clk);
clk_disable_unprepare(host->core_clk);
- mmc_free_host(host->mmc);
return 0;
}
diff --git a/drivers/mmc/host/sdhci_f_sdh30.c b/drivers/mmc/host/sdhci_f_sdh30.c
index 6c4f43e11282..7ede74bf3723 100644
--- a/drivers/mmc/host/sdhci_f_sdh30.c
+++ b/drivers/mmc/host/sdhci_f_sdh30.c
@@ -26,9 +26,16 @@ struct f_sdhost_priv {
bool enable_cmd_dat_delay;
};
+static void *sdhci_f_sdhost_priv(struct sdhci_host *host)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+
+ return sdhci_pltfm_priv(pltfm_host);
+}
+
static void sdhci_f_sdh30_soft_voltage_switch(struct sdhci_host *host)
{
- struct f_sdhost_priv *priv = sdhci_priv(host);
+ struct f_sdhost_priv *priv = sdhci_f_sdhost_priv(host);
u32 ctrl = 0;
usleep_range(2500, 3000);
@@ -61,7 +68,7 @@ static unsigned int sdhci_f_sdh30_get_min_clock(struct sdhci_host *host)
static void sdhci_f_sdh30_reset(struct sdhci_host *host, u8 mask)
{
- struct f_sdhost_priv *priv = sdhci_priv(host);
+ struct f_sdhost_priv *priv = sdhci_f_sdhost_priv(host);
u32 ctl;
if (sdhci_readw(host, SDHCI_CLOCK_CONTROL) == 0)
@@ -85,30 +92,32 @@ static const struct sdhci_ops sdhci_f_sdh30_ops = {
.set_uhs_signaling = sdhci_set_uhs_signaling,
};
+static const struct sdhci_pltfm_data sdhci_f_sdh30_pltfm_data = {
+ .ops = &sdhci_f_sdh30_ops,
+ .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC
+ | SDHCI_QUIRK_INVERTED_WRITE_PROTECT,
+ .quirks2 = SDHCI_QUIRK2_SUPPORT_SINGLE
+ | SDHCI_QUIRK2_TUNING_WORK_AROUND,
+};
+
static int sdhci_f_sdh30_probe(struct platform_device *pdev)
{
struct sdhci_host *host;
struct device *dev = &pdev->dev;
- int irq, ctrl = 0, ret = 0;
+ int ctrl = 0, ret = 0;
struct f_sdhost_priv *priv;
+ struct sdhci_pltfm_host *pltfm_host;
u32 reg = 0;
- irq = platform_get_irq(pdev, 0);
- if (irq < 0)
- return irq;
-
- host = sdhci_alloc_host(dev, sizeof(struct f_sdhost_priv));
+ host = sdhci_pltfm_init(pdev, &sdhci_f_sdh30_pltfm_data,
+ sizeof(struct f_sdhost_priv));
if (IS_ERR(host))
return PTR_ERR(host);
- priv = sdhci_priv(host);
+ pltfm_host = sdhci_priv(host);
+ priv = sdhci_pltfm_priv(pltfm_host);
priv->dev = dev;
- host->quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
- SDHCI_QUIRK_INVERTED_WRITE_PROTECT;
- host->quirks2 = SDHCI_QUIRK2_SUPPORT_SINGLE |
- SDHCI_QUIRK2_TUNING_WORK_AROUND;
-
priv->enable_cmd_dat_delay = device_property_read_bool(dev,
"fujitsu,cmd-dat-delay-select");
@@ -116,18 +125,6 @@ static int sdhci_f_sdh30_probe(struct platform_device *pdev)
if (ret)
goto err;
- platform_set_drvdata(pdev, host);
-
- host->hw_name = "f_sdh30";
- host->ops = &sdhci_f_sdh30_ops;
- host->irq = irq;
-
- host->ioaddr = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(host->ioaddr)) {
- ret = PTR_ERR(host->ioaddr);
- goto err;
- }
-
if (dev_of_node(dev)) {
sdhci_get_of_property(pdev);
@@ -182,23 +179,22 @@ static int sdhci_f_sdh30_probe(struct platform_device *pdev)
err_clk:
clk_disable_unprepare(priv->clk_iface);
err:
- sdhci_free_host(host);
+ sdhci_pltfm_free(pdev);
+
return ret;
}
static int sdhci_f_sdh30_remove(struct platform_device *pdev)
{
struct sdhci_host *host = platform_get_drvdata(pdev);
- struct f_sdhost_priv *priv = sdhci_priv(host);
-
- sdhci_remove_host(host, readl(host->ioaddr + SDHCI_INT_STATUS) ==
- 0xffffffff);
+ struct f_sdhost_priv *priv = sdhci_f_sdhost_priv(host);
+ struct clk *clk_iface = priv->clk_iface;
+ struct clk *clk = priv->clk;
- clk_disable_unprepare(priv->clk_iface);
- clk_disable_unprepare(priv->clk);
+ sdhci_pltfm_unregister(pdev);
- sdhci_free_host(host);
- platform_set_drvdata(pdev, NULL);
+ clk_disable_unprepare(clk_iface);
+ clk_disable_unprepare(clk);
return 0;
}
diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c
index 9215069c6156..b834fde3f9ed 100644
--- a/drivers/mmc/host/sunxi-mmc.c
+++ b/drivers/mmc/host/sunxi-mmc.c
@@ -1317,8 +1317,8 @@ static int sunxi_mmc_resource_request(struct sunxi_mmc_host *host,
return ret;
host->irq = platform_get_irq(pdev, 0);
- if (host->irq <= 0) {
- ret = -EINVAL;
+ if (host->irq < 0) {
+ ret = host->irq;
goto error_disable_mmc;
}
diff --git a/drivers/mmc/host/wbsd.c b/drivers/mmc/host/wbsd.c
index f3090216e0dc..6db08070b628 100644
--- a/drivers/mmc/host/wbsd.c
+++ b/drivers/mmc/host/wbsd.c
@@ -1710,8 +1710,6 @@ static int wbsd_init(struct device *dev, int base, int irq, int dma,
wbsd_release_resources(host);
wbsd_free_mmc(dev);
-
- mmc_free_host(mmc);
return ret;
}
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 8b2c8546f4c9..177151298d72 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -2310,6 +2310,14 @@ static void mv88e6xxx_hardware_reset(struct mv88e6xxx_chip *chip)
/* If there is a GPIO connected to the reset pin, toggle it */
if (gpiod) {
+ /* If the switch has just been reset and not yet completed
+ * loading EEPROM, the reset may interrupt the I2C transaction
+ * mid-byte, causing the first EEPROM read after the reset
+ * from the wrong location resulting in the switch booting
+ * to wrong mode and inoperable.
+ */
+ mv88e6xxx_g1_wait_eeprom_done(chip);
+
gpiod_set_value_cansleep(gpiod, 1);
usleep_range(10000, 20000);
gpiod_set_value_cansleep(gpiod, 0);
diff --git a/drivers/net/ethernet/intel/i40e/i40e_nvm.c b/drivers/net/ethernet/intel/i40e/i40e_nvm.c
index 7164f4ad8120..6b1996451a4b 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_nvm.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_nvm.c
@@ -210,11 +210,11 @@ static i40e_status i40e_read_nvm_word_srctl(struct i40e_hw *hw, u16 offset,
* @hw: pointer to the HW structure.
* @module_pointer: module pointer location in words from the NVM beginning
* @offset: offset in words from module start
- * @words: number of words to write
- * @data: buffer with words to write to the Shadow RAM
+ * @words: number of words to read
+ * @data: buffer with words to read to the Shadow RAM
* @last_command: tells the AdminQ that this is the last command
*
- * Writes a 16 bit words buffer to the Shadow RAM using the admin command.
+ * Reads a 16 bit words buffer to the Shadow RAM using the admin command.
**/
static i40e_status i40e_read_nvm_aq(struct i40e_hw *hw,
u8 module_pointer, u32 offset,
@@ -234,18 +234,18 @@ static i40e_status i40e_read_nvm_aq(struct i40e_hw *hw,
*/
if ((offset + words) > hw->nvm.sr_size)
i40e_debug(hw, I40E_DEBUG_NVM,
- "NVM write error: offset %d beyond Shadow RAM limit %d\n",
+ "NVM read error: offset %d beyond Shadow RAM limit %d\n",
(offset + words), hw->nvm.sr_size);
else if (words > I40E_SR_SECTOR_SIZE_IN_WORDS)
- /* We can write only up to 4KB (one sector), in one AQ write */
+ /* We can read only up to 4KB (one sector), in one AQ write */
i40e_debug(hw, I40E_DEBUG_NVM,
- "NVM write fail error: tried to write %d words, limit is %d.\n",
+ "NVM read fail error: tried to read %d words, limit is %d.\n",
words, I40E_SR_SECTOR_SIZE_IN_WORDS);
else if (((offset + (words - 1)) / I40E_SR_SECTOR_SIZE_IN_WORDS)
!= (offset / I40E_SR_SECTOR_SIZE_IN_WORDS))
- /* A single write cannot spread over two sectors */
+ /* A single read cannot spread over two sectors */
i40e_debug(hw, I40E_DEBUG_NVM,
- "NVM write error: cannot spread over two sectors in a single write offset=%d words=%d\n",
+ "NVM read error: cannot spread over two sectors in a single read offset=%d words=%d\n",
offset, words);
else
ret_code = i40e_aq_read_nvm(hw, module_pointer,
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
index 44a434b1178b..80dee8c69249 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
@@ -89,7 +89,8 @@ static u64 mlx5_read_internal_timer(struct mlx5_core_dev *dev,
static u64 read_internal_timer(const struct cyclecounter *cc)
{
- struct mlx5_clock *clock = container_of(cc, struct mlx5_clock, cycles);
+ struct mlx5_timer *timer = container_of(cc, struct mlx5_timer, cycles);
+ struct mlx5_clock *clock = container_of(timer, struct mlx5_clock, timer);
struct mlx5_core_dev *mdev = container_of(clock, struct mlx5_core_dev,
clock);
@@ -100,6 +101,7 @@ static void mlx5_update_clock_info_page(struct mlx5_core_dev *mdev)
{
struct mlx5_ib_clock_info *clock_info = mdev->clock_info;
struct mlx5_clock *clock = &mdev->clock;
+ struct mlx5_timer *timer;
u32 sign;
if (!clock_info)
@@ -109,10 +111,11 @@ static void mlx5_update_clock_info_page(struct mlx5_core_dev *mdev)
smp_store_mb(clock_info->sign,
sign | MLX5_IB_CLOCK_INFO_KERNEL_UPDATING);
- clock_info->cycles = clock->tc.cycle_last;
- clock_info->mult = clock->cycles.mult;
- clock_info->nsec = clock->tc.nsec;
- clock_info->frac = clock->tc.frac;
+ timer = &clock->timer;
+ clock_info->cycles = timer->tc.cycle_last;
+ clock_info->mult = timer->cycles.mult;
+ clock_info->nsec = timer->tc.nsec;
+ clock_info->frac = timer->tc.frac;
smp_store_release(&clock_info->sign,
sign + MLX5_IB_CLOCK_INFO_KERNEL_UPDATING * 2);
@@ -151,28 +154,37 @@ static void mlx5_timestamp_overflow(struct work_struct *work)
{
struct delayed_work *dwork = to_delayed_work(work);
struct mlx5_core_dev *mdev;
+ struct mlx5_timer *timer;
struct mlx5_clock *clock;
unsigned long flags;
- clock = container_of(dwork, struct mlx5_clock, overflow_work);
+ timer = container_of(dwork, struct mlx5_timer, overflow_work);
+ clock = container_of(timer, struct mlx5_clock, timer);
mdev = container_of(clock, struct mlx5_core_dev, clock);
+
+ if (mdev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR)
+ goto out;
+
write_seqlock_irqsave(&clock->lock, flags);
- timecounter_read(&clock->tc);
+ timecounter_read(&timer->tc);
mlx5_update_clock_info_page(mdev);
write_sequnlock_irqrestore(&clock->lock, flags);
- schedule_delayed_work(&clock->overflow_work, clock->overflow_period);
+
+out:
+ schedule_delayed_work(&timer->overflow_work, timer->overflow_period);
}
static int mlx5_ptp_settime(struct ptp_clock_info *ptp, const struct timespec64 *ts)
{
struct mlx5_clock *clock = container_of(ptp, struct mlx5_clock, ptp_info);
+ struct mlx5_timer *timer = &clock->timer;
u64 ns = timespec64_to_ns(ts);
struct mlx5_core_dev *mdev;
unsigned long flags;
mdev = container_of(clock, struct mlx5_core_dev, clock);
write_seqlock_irqsave(&clock->lock, flags);
- timecounter_init(&clock->tc, &clock->cycles, ns);
+ timecounter_init(&timer->tc, &timer->cycles, ns);
mlx5_update_clock_info_page(mdev);
write_sequnlock_irqrestore(&clock->lock, flags);
@@ -183,6 +195,7 @@ static int mlx5_ptp_gettimex(struct ptp_clock_info *ptp, struct timespec64 *ts,
struct ptp_system_timestamp *sts)
{
struct mlx5_clock *clock = container_of(ptp, struct mlx5_clock, ptp_info);
+ struct mlx5_timer *timer = &clock->timer;
struct mlx5_core_dev *mdev;
unsigned long flags;
u64 cycles, ns;
@@ -190,7 +203,7 @@ static int mlx5_ptp_gettimex(struct ptp_clock_info *ptp, struct timespec64 *ts,
mdev = container_of(clock, struct mlx5_core_dev, clock);
write_seqlock_irqsave(&clock->lock, flags);
cycles = mlx5_read_internal_timer(mdev, sts);
- ns = timecounter_cyc2time(&clock->tc, cycles);
+ ns = timecounter_cyc2time(&timer->tc, cycles);
write_sequnlock_irqrestore(&clock->lock, flags);
*ts = ns_to_timespec64(ns);
@@ -201,12 +214,13 @@ static int mlx5_ptp_gettimex(struct ptp_clock_info *ptp, struct timespec64 *ts,
static int mlx5_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
{
struct mlx5_clock *clock = container_of(ptp, struct mlx5_clock, ptp_info);
+ struct mlx5_timer *timer = &clock->timer;
struct mlx5_core_dev *mdev;
unsigned long flags;
mdev = container_of(clock, struct mlx5_core_dev, clock);
write_seqlock_irqsave(&clock->lock, flags);
- timecounter_adjtime(&clock->tc, delta);
+ timecounter_adjtime(&timer->tc, delta);
mlx5_update_clock_info_page(mdev);
write_sequnlock_irqrestore(&clock->lock, flags);
@@ -216,27 +230,27 @@ static int mlx5_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
static int mlx5_ptp_adjfreq(struct ptp_clock_info *ptp, s32 delta)
{
struct mlx5_clock *clock = container_of(ptp, struct mlx5_clock, ptp_info);
+ struct mlx5_timer *timer = &clock->timer;
struct mlx5_core_dev *mdev;
unsigned long flags;
int neg_adj = 0;
u32 diff;
u64 adj;
-
if (delta < 0) {
neg_adj = 1;
delta = -delta;
}
- adj = clock->nominal_c_mult;
+ adj = timer->nominal_c_mult;
adj *= delta;
diff = div_u64(adj, 1000000000ULL);
mdev = container_of(clock, struct mlx5_core_dev, clock);
write_seqlock_irqsave(&clock->lock, flags);
- timecounter_read(&clock->tc);
- clock->cycles.mult = neg_adj ? clock->nominal_c_mult - diff :
- clock->nominal_c_mult + diff;
+ timecounter_read(&timer->tc);
+ timer->cycles.mult = neg_adj ? timer->nominal_c_mult - diff :
+ timer->nominal_c_mult + diff;
mlx5_update_clock_info_page(mdev);
write_sequnlock_irqrestore(&clock->lock, flags);
@@ -313,6 +327,7 @@ static int mlx5_perout_configure(struct ptp_clock_info *ptp,
container_of(ptp, struct mlx5_clock, ptp_info);
struct mlx5_core_dev *mdev =
container_of(clock, struct mlx5_core_dev, clock);
+ struct mlx5_timer *timer = &clock->timer;
u32 in[MLX5_ST_SZ_DW(mtpps_reg)] = {0};
u64 nsec_now, nsec_delta, time_stamp = 0;
u64 cycles_now, cycles_delta;
@@ -355,10 +370,10 @@ static int mlx5_perout_configure(struct ptp_clock_info *ptp,
ns = timespec64_to_ns(&ts);
cycles_now = mlx5_read_internal_timer(mdev, NULL);
write_seqlock_irqsave(&clock->lock, flags);
- nsec_now = timecounter_cyc2time(&clock->tc, cycles_now);
+ nsec_now = timecounter_cyc2time(&timer->tc, cycles_now);
nsec_delta = ns - nsec_now;
- cycles_delta = div64_u64(nsec_delta << clock->cycles.shift,
- clock->cycles.mult);
+ cycles_delta = div64_u64(nsec_delta << timer->cycles.shift,
+ timer->cycles.mult);
write_sequnlock_irqrestore(&clock->lock, flags);
time_stamp = cycles_now + cycles_delta;
field_select = MLX5_MTPPS_FS_PIN_MODE |
@@ -541,6 +556,7 @@ static int mlx5_pps_event(struct notifier_block *nb,
unsigned long type, void *data)
{
struct mlx5_clock *clock = mlx5_nb_cof(nb, struct mlx5_clock, pps_nb);
+ struct mlx5_timer *timer = &clock->timer;
struct ptp_clock_event ptp_event;
u64 cycles_now, cycles_delta;
u64 nsec_now, nsec_delta, ns;
@@ -575,10 +591,10 @@ static int mlx5_pps_event(struct notifier_block *nb,
ts.tv_nsec = 0;
ns = timespec64_to_ns(&ts);
write_seqlock_irqsave(&clock->lock, flags);
- nsec_now = timecounter_cyc2time(&clock->tc, cycles_now);
+ nsec_now = timecounter_cyc2time(&timer->tc, cycles_now);
nsec_delta = ns - nsec_now;
- cycles_delta = div64_u64(nsec_delta << clock->cycles.shift,
- clock->cycles.mult);
+ cycles_delta = div64_u64(nsec_delta << timer->cycles.shift,
+ timer->cycles.mult);
clock->pps_info.start[pin] = cycles_now + cycles_delta;
write_sequnlock_irqrestore(&clock->lock, flags);
schedule_work(&clock->pps_info.out_work);
@@ -591,29 +607,32 @@ static int mlx5_pps_event(struct notifier_block *nb,
return NOTIFY_OK;
}
-void mlx5_init_clock(struct mlx5_core_dev *mdev)
+static void mlx5_timecounter_init(struct mlx5_core_dev *mdev)
{
struct mlx5_clock *clock = &mdev->clock;
- u64 overflow_cycles;
- u64 ns;
- u64 frac = 0;
+ struct mlx5_timer *timer = &clock->timer;
u32 dev_freq;
dev_freq = MLX5_CAP_GEN(mdev, device_frequency_khz);
- if (!dev_freq) {
- mlx5_core_warn(mdev, "invalid device_frequency_khz, aborting HW clock init\n");
- return;
- }
- seqlock_init(&clock->lock);
- clock->cycles.read = read_internal_timer;
- clock->cycles.shift = MLX5_CYCLES_SHIFT;
- clock->cycles.mult = clocksource_khz2mult(dev_freq,
- clock->cycles.shift);
- clock->nominal_c_mult = clock->cycles.mult;
- clock->cycles.mask = CLOCKSOURCE_MASK(41);
-
- timecounter_init(&clock->tc, &clock->cycles,
+ timer->cycles.read = read_internal_timer;
+ timer->cycles.shift = MLX5_CYCLES_SHIFT;
+ timer->cycles.mult = clocksource_khz2mult(dev_freq,
+ timer->cycles.shift);
+ timer->nominal_c_mult = timer->cycles.mult;
+ timer->cycles.mask = CLOCKSOURCE_MASK(41);
+
+ timecounter_init(&timer->tc, &timer->cycles,
ktime_to_ns(ktime_get_real()));
+}
+
+static void mlx5_init_overflow_period(struct mlx5_clock *clock)
+{
+ struct mlx5_core_dev *mdev = container_of(clock, struct mlx5_core_dev, clock);
+ struct mlx5_ib_clock_info *clock_info = mdev->clock_info;
+ struct mlx5_timer *timer = &clock->timer;
+ u64 overflow_cycles;
+ u64 frac = 0;
+ u64 ns;
/* Calculate period in seconds to call the overflow watchdog - to make
* sure counter is checked at least twice every wrap around.
@@ -622,32 +641,63 @@ void mlx5_init_clock(struct mlx5_core_dev *mdev)
* multiplied by clock multiplier where the result doesn't exceed
* 64bits.
*/
- overflow_cycles = div64_u64(~0ULL >> 1, clock->cycles.mult);
- overflow_cycles = min(overflow_cycles, div_u64(clock->cycles.mask, 3));
+ overflow_cycles = div64_u64(~0ULL >> 1, timer->cycles.mult);
+ overflow_cycles = min(overflow_cycles, div_u64(timer->cycles.mask, 3));
- ns = cyclecounter_cyc2ns(&clock->cycles, overflow_cycles,
+ ns = cyclecounter_cyc2ns(&timer->cycles, overflow_cycles,
frac, &frac);
do_div(ns, NSEC_PER_SEC / HZ);
- clock->overflow_period = ns;
+ timer->overflow_period = ns;
- mdev->clock_info =
- (struct mlx5_ib_clock_info *)get_zeroed_page(GFP_KERNEL);
- if (mdev->clock_info) {
- mdev->clock_info->nsec = clock->tc.nsec;
- mdev->clock_info->cycles = clock->tc.cycle_last;
- mdev->clock_info->mask = clock->cycles.mask;
- mdev->clock_info->mult = clock->nominal_c_mult;
- mdev->clock_info->shift = clock->cycles.shift;
- mdev->clock_info->frac = clock->tc.frac;
- mdev->clock_info->overflow_period = clock->overflow_period;
+ INIT_DELAYED_WORK(&timer->overflow_work, mlx5_timestamp_overflow);
+ if (timer->overflow_period)
+ schedule_delayed_work(&timer->overflow_work, 0);
+ else
+ mlx5_core_warn(mdev,
+ "invalid overflow period, overflow_work is not scheduled\n");
+
+ if (clock_info)
+ clock_info->overflow_period = timer->overflow_period;
+}
+
+static void mlx5_init_clock_info(struct mlx5_core_dev *mdev)
+{
+ struct mlx5_clock *clock = &mdev->clock;
+ struct mlx5_ib_clock_info *info;
+ struct mlx5_timer *timer;
+
+ mdev->clock_info = (struct mlx5_ib_clock_info *)get_zeroed_page(GFP_KERNEL);
+ if (!mdev->clock_info) {
+ mlx5_core_warn(mdev, "Failed to allocate IB clock info page\n");
+ return;
}
+ info = mdev->clock_info;
+ timer = &clock->timer;
+
+ info->nsec = timer->tc.nsec;
+ info->cycles = timer->tc.cycle_last;
+ info->mask = timer->cycles.mask;
+ info->mult = timer->nominal_c_mult;
+ info->shift = timer->cycles.shift;
+ info->frac = timer->tc.frac;
+}
+
+void mlx5_init_clock(struct mlx5_core_dev *mdev)
+{
+ struct mlx5_clock *clock = &mdev->clock;
+
+ if (!MLX5_CAP_GEN(mdev, device_frequency_khz)) {
+ mlx5_core_warn(mdev, "invalid device_frequency_khz, aborting HW clock init\n");
+ return;
+ }
+
+ seqlock_init(&clock->lock);
+
+ mlx5_timecounter_init(mdev);
+ mlx5_init_clock_info(mdev);
+ mlx5_init_overflow_period(clock);
INIT_WORK(&clock->pps_info.out_work, mlx5_pps_out);
- INIT_DELAYED_WORK(&clock->overflow_work, mlx5_timestamp_overflow);
- if (clock->overflow_period)
- schedule_delayed_work(&clock->overflow_work, 0);
- else
- mlx5_core_warn(mdev, "invalid overflow period, overflow_work is not scheduled\n");
/* Configure the PHC */
clock->ptp_info = mlx5_ptp_clock_info;
@@ -684,7 +734,7 @@ void mlx5_cleanup_clock(struct mlx5_core_dev *mdev)
}
cancel_work_sync(&clock->pps_info.out_work);
- cancel_delayed_work_sync(&clock->overflow_work);
+ cancel_delayed_work_sync(&clock->timer.overflow_work);
if (mdev->clock_info) {
free_page((unsigned long)mdev->clock_info);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.h b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.h
index 31600924bdc3..6e8804ebc773 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.h
@@ -45,12 +45,13 @@ static inline int mlx5_clock_get_ptp_index(struct mlx5_core_dev *mdev)
static inline ktime_t mlx5_timecounter_cyc2time(struct mlx5_clock *clock,
u64 timestamp)
{
+ struct mlx5_timer *timer = &clock->timer;
unsigned int seq;
u64 nsec;
do {
seq = read_seqbegin(&clock->lock);
- nsec = timecounter_cyc2time(&clock->tc, timestamp);
+ nsec = timecounter_cyc2time(&timer->tc, timestamp);
} while (read_seqretry(&clock->lock, seq));
return ns_to_ktime(nsec);
diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c
index 4fdb970e3482..2ad15b1d7ffd 100644
--- a/drivers/net/macsec.c
+++ b/drivers/net/macsec.c
@@ -159,6 +159,19 @@ static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
return sa;
}
+static struct macsec_rx_sa *macsec_active_rxsa_get(struct macsec_rx_sc *rx_sc)
+{
+ struct macsec_rx_sa *sa = NULL;
+ int an;
+
+ for (an = 0; an < MACSEC_NUM_AN; an++) {
+ sa = macsec_rxsa_get(rx_sc->sa[an]);
+ if (sa)
+ break;
+ }
+ return sa;
+}
+
static void free_rx_sc_rcu(struct rcu_head *head)
{
struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
@@ -497,18 +510,28 @@ static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
skb->protocol = eth_hdr(skb)->h_proto;
}
+static unsigned int macsec_msdu_len(struct sk_buff *skb)
+{
+ struct macsec_dev *macsec = macsec_priv(skb->dev);
+ struct macsec_secy *secy = &macsec->secy;
+ bool sci_present = macsec_skb_cb(skb)->has_sci;
+
+ return skb->len - macsec_hdr_len(sci_present) - secy->icv_len;
+}
+
static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
struct macsec_tx_sa *tx_sa)
{
+ unsigned int msdu_len = macsec_msdu_len(skb);
struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
u64_stats_update_begin(&txsc_stats->syncp);
if (tx_sc->encrypt) {
- txsc_stats->stats.OutOctetsEncrypted += skb->len;
+ txsc_stats->stats.OutOctetsEncrypted += msdu_len;
txsc_stats->stats.OutPktsEncrypted++;
this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
} else {
- txsc_stats->stats.OutOctetsProtected += skb->len;
+ txsc_stats->stats.OutOctetsProtected += msdu_len;
txsc_stats->stats.OutPktsProtected++;
this_cpu_inc(tx_sa->stats->OutPktsProtected);
}
@@ -538,9 +561,10 @@ static void macsec_encrypt_done(struct crypto_async_request *base, int err)
aead_request_free(macsec_skb_cb(skb)->req);
rcu_read_lock_bh();
- macsec_encrypt_finish(skb, dev);
macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
- len = skb->len;
+ /* packet is encrypted/protected so tx_bytes must be calculated */
+ len = macsec_msdu_len(skb) + 2 * ETH_ALEN;
+ macsec_encrypt_finish(skb, dev);
ret = dev_queue_xmit(skb);
count_tx(dev, ret, len);
rcu_read_unlock_bh();
@@ -699,6 +723,7 @@ static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
macsec_skb_cb(skb)->req = req;
macsec_skb_cb(skb)->tx_sa = tx_sa;
+ macsec_skb_cb(skb)->has_sci = sci_present;
aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
dev_hold(skb->dev);
@@ -740,15 +765,17 @@ static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u
u64_stats_update_begin(&rxsc_stats->syncp);
rxsc_stats->stats.InPktsLate++;
u64_stats_update_end(&rxsc_stats->syncp);
+ DEV_STATS_INC(secy->netdev, rx_dropped);
return false;
}
if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
+ unsigned int msdu_len = macsec_msdu_len(skb);
u64_stats_update_begin(&rxsc_stats->syncp);
if (hdr->tci_an & MACSEC_TCI_E)
- rxsc_stats->stats.InOctetsDecrypted += skb->len;
+ rxsc_stats->stats.InOctetsDecrypted += msdu_len;
else
- rxsc_stats->stats.InOctetsValidated += skb->len;
+ rxsc_stats->stats.InOctetsValidated += msdu_len;
u64_stats_update_end(&rxsc_stats->syncp);
}
@@ -761,6 +788,8 @@ static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u
u64_stats_update_begin(&rxsc_stats->syncp);
rxsc_stats->stats.InPktsNotValid++;
u64_stats_update_end(&rxsc_stats->syncp);
+ this_cpu_inc(rx_sa->stats->InPktsNotValid);
+ DEV_STATS_INC(secy->netdev, rx_errors);
return false;
}
@@ -853,9 +882,9 @@ static void macsec_decrypt_done(struct crypto_async_request *base, int err)
macsec_finalize_skb(skb, macsec->secy.icv_len,
macsec_extra_len(macsec_skb_cb(skb)->has_sci));
+ len = skb->len;
macsec_reset_skb(skb, macsec->secy.netdev);
- len = skb->len;
if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS)
count_rx(dev, len);
@@ -1046,6 +1075,7 @@ static enum rx_handler_result handle_not_macsec(struct sk_buff *skb)
u64_stats_update_begin(&secy_stats->syncp);
secy_stats->stats.InPktsNoTag++;
u64_stats_update_end(&secy_stats->syncp);
+ DEV_STATS_INC(macsec->secy.netdev, rx_dropped);
continue;
}
@@ -1155,6 +1185,7 @@ static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
u64_stats_update_begin(&secy_stats->syncp);
secy_stats->stats.InPktsBadTag++;
u64_stats_update_end(&secy_stats->syncp);
+ DEV_STATS_INC(secy->netdev, rx_errors);
goto drop_nosa;
}
@@ -1165,11 +1196,15 @@ static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
/* If validateFrames is Strict or the C bit in the
* SecTAG is set, discard
*/
+ struct macsec_rx_sa *active_rx_sa = macsec_active_rxsa_get(rx_sc);
if (hdr->tci_an & MACSEC_TCI_C ||
secy->validate_frames == MACSEC_VALIDATE_STRICT) {
u64_stats_update_begin(&rxsc_stats->syncp);
rxsc_stats->stats.InPktsNotUsingSA++;
u64_stats_update_end(&rxsc_stats->syncp);
+ DEV_STATS_INC(secy->netdev, rx_errors);
+ if (active_rx_sa)
+ this_cpu_inc(active_rx_sa->stats->InPktsNotUsingSA);
goto drop_nosa;
}
@@ -1179,6 +1214,8 @@ static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
u64_stats_update_begin(&rxsc_stats->syncp);
rxsc_stats->stats.InPktsUnusedSA++;
u64_stats_update_end(&rxsc_stats->syncp);
+ if (active_rx_sa)
+ this_cpu_inc(active_rx_sa->stats->InPktsUnusedSA);
goto deliver;
}
@@ -1199,6 +1236,7 @@ static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
u64_stats_update_begin(&rxsc_stats->syncp);
rxsc_stats->stats.InPktsLate++;
u64_stats_update_end(&rxsc_stats->syncp);
+ DEV_STATS_INC(macsec->secy.netdev, rx_dropped);
goto drop;
}
}
@@ -1227,6 +1265,7 @@ static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
deliver:
macsec_finalize_skb(skb, secy->icv_len,
macsec_extra_len(macsec_skb_cb(skb)->has_sci));
+ len = skb->len;
macsec_reset_skb(skb, secy->netdev);
if (rx_sa)
@@ -1234,12 +1273,11 @@ static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
macsec_rxsc_put(rx_sc);
skb_orphan(skb);
- len = skb->len;
ret = gro_cells_receive(&macsec->gro_cells, skb);
if (ret == NET_RX_SUCCESS)
count_rx(dev, len);
else
- macsec->secy.netdev->stats.rx_dropped++;
+ DEV_STATS_INC(macsec->secy.netdev, rx_dropped);
rcu_read_unlock();
@@ -1276,6 +1314,7 @@ static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
u64_stats_update_begin(&secy_stats->syncp);
secy_stats->stats.InPktsNoSCI++;
u64_stats_update_end(&secy_stats->syncp);
+ DEV_STATS_INC(macsec->secy.netdev, rx_errors);
continue;
}
@@ -1294,7 +1333,7 @@ static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
secy_stats->stats.InPktsUnknownSCI++;
u64_stats_update_end(&secy_stats->syncp);
} else {
- macsec->secy.netdev->stats.rx_dropped++;
+ DEV_STATS_INC(macsec->secy.netdev, rx_dropped);
}
}
@@ -3403,21 +3442,21 @@ static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
if (!secy->operational) {
kfree_skb(skb);
- dev->stats.tx_dropped++;
+ DEV_STATS_INC(dev, tx_dropped);
return NETDEV_TX_OK;
}
+ len = skb->len;
skb = macsec_encrypt(skb, dev);
if (IS_ERR(skb)) {
if (PTR_ERR(skb) != -EINPROGRESS)
- dev->stats.tx_dropped++;
+ DEV_STATS_INC(dev, tx_dropped);
return NETDEV_TX_OK;
}
macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
macsec_encrypt_finish(skb, dev);
- len = skb->len;
ret = dev_queue_xmit(skb);
count_tx(dev, ret, len);
return ret;
@@ -3646,8 +3685,9 @@ static void macsec_get_stats64(struct net_device *dev,
dev_fetch_sw_netstats(s, dev->tstats);
- s->rx_dropped = dev->stats.rx_dropped;
- s->tx_dropped = dev->stats.tx_dropped;
+ s->rx_dropped = atomic_long_read(&dev->stats.__rx_dropped);
+ s->tx_dropped = atomic_long_read(&dev->stats.__tx_dropped);
+ s->rx_errors = atomic_long_read(&dev->stats.__rx_errors);
}
static int macsec_get_iflink(const struct net_device *dev)
diff --git a/drivers/net/phy/broadcom.c b/drivers/net/phy/broadcom.c
index 0cde17bd743f..a664faa8f01f 100644
--- a/drivers/net/phy/broadcom.c
+++ b/drivers/net/phy/broadcom.c
@@ -404,6 +404,17 @@ static int bcm54xx_resume(struct phy_device *phydev)
return bcm54xx_config_init(phydev);
}
+static int bcm54810_read_mmd(struct phy_device *phydev, int devnum, u16 regnum)
+{
+ return -EOPNOTSUPP;
+}
+
+static int bcm54810_write_mmd(struct phy_device *phydev, int devnum, u16 regnum,
+ u16 val)
+{
+ return -EOPNOTSUPP;
+}
+
static int bcm54811_config_init(struct phy_device *phydev)
{
int err, reg;
@@ -841,6 +852,8 @@ static struct phy_driver broadcom_drivers[] = {
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM54810",
/* PHY_GBIT_FEATURES */
+ .read_mmd = bcm54810_read_mmd,
+ .write_mmd = bcm54810_write_mmd,
.config_init = bcm54xx_config_init,
.config_aneg = bcm5481_config_aneg,
.ack_interrupt = bcm_phy_ack_intr,
diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c
index 36c7eae776d4..721b536ce886 100644
--- a/drivers/net/team/team.c
+++ b/drivers/net/team/team.c
@@ -2195,7 +2195,9 @@ static void team_setup(struct net_device *dev)
dev->hw_features = TEAM_VLAN_FEATURES |
NETIF_F_HW_VLAN_CTAG_RX |
- NETIF_F_HW_VLAN_CTAG_FILTER;
+ NETIF_F_HW_VLAN_CTAG_FILTER |
+ NETIF_F_HW_VLAN_STAG_RX |
+ NETIF_F_HW_VLAN_STAG_FILTER;
dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4;
dev->features |= dev->hw_features;
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 165149bcf0b1..2fd5d2b7a209 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -3220,8 +3220,6 @@ static int virtnet_probe(struct virtio_device *vdev)
}
}
- _virtnet_set_queues(vi, vi->curr_queue_pairs);
-
/* serialize netdev register + virtio_device_ready() with ndo_open() */
rtnl_lock();
@@ -3234,6 +3232,8 @@ static int virtnet_probe(struct virtio_device *vdev)
virtio_device_ready(vdev);
+ _virtnet_set_queues(vi, vi->curr_queue_pairs);
+
rtnl_unlock();
err = virtnet_cpu_notif_add(vi);
diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index 1222f5749bc6..a215777df96c 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -239,6 +239,7 @@
#define EP_STATE_ENABLED 1
static const unsigned int pcie_gen_freq[] = {
+ GEN1_CORE_CLK_FREQ, /* PCI_EXP_LNKSTA_CLS == 0; undefined */
GEN1_CORE_CLK_FREQ,
GEN2_CORE_CLK_FREQ,
GEN3_CORE_CLK_FREQ,
@@ -470,7 +471,11 @@ static irqreturn_t tegra_pcie_ep_irq_thread(int irq, void *arg)
speed = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKSTA) &
PCI_EXP_LNKSTA_CLS;
- clk_set_rate(pcie->core_clk, pcie_gen_freq[speed - 1]);
+
+ if (speed >= ARRAY_SIZE(pcie_gen_freq))
+ speed = 0;
+
+ clk_set_rate(pcie->core_clk, pcie_gen_freq[speed]);
/* If EP doesn't advertise L1SS, just return */
val = dw_pcie_readl_dbi(pci, pcie->cfg_link_cap_l1sub);
@@ -973,7 +978,11 @@ static int tegra_pcie_dw_host_init(struct pcie_port *pp)
speed = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKSTA) &
PCI_EXP_LNKSTA_CLS;
- clk_set_rate(pcie->core_clk, pcie_gen_freq[speed - 1]);
+
+ if (speed >= ARRAY_SIZE(pcie_gen_freq))
+ speed = 0;
+
+ clk_set_rate(pcie->core_clk, pcie_gen_freq[speed]);
tegra_pcie_enable_interrupts(pp);
diff --git a/drivers/pcmcia/rsrc_nonstatic.c b/drivers/pcmcia/rsrc_nonstatic.c
index 69a6e9a5d6d2..6e90927e6576 100644
--- a/drivers/pcmcia/rsrc_nonstatic.c
+++ b/drivers/pcmcia/rsrc_nonstatic.c
@@ -1053,6 +1053,8 @@ static void nonstatic_release_resource_db(struct pcmcia_socket *s)
q = p->next;
kfree(p);
}
+
+ kfree(data);
}
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index d439afef9212..94c963462d74 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -2159,12 +2159,13 @@ static void gsm_error(struct gsm_mux *gsm,
static void gsm_cleanup_mux(struct gsm_mux *gsm, bool disc)
{
int i;
- struct gsm_dlci *dlci = gsm->dlci[0];
+ struct gsm_dlci *dlci;
struct gsm_msg *txq, *ntxq;
gsm->dead = true;
mutex_lock(&gsm->mutex);
+ dlci = gsm->dlci[0];
if (dlci) {
if (disc && dlci->state != DLCI_CLOSED) {
gsm_dlci_begin_close(dlci);
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 432a438929e6..7499954c9aa7 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -3231,6 +3231,7 @@ void serial8250_init_port(struct uart_8250_port *up)
struct uart_port *port = &up->port;
spin_lock_init(&port->lock);
+ port->pm = NULL;
port->ops = &serial8250_pops;
port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_8250_CONSOLE);
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index a4cf00756681..227fb2d32046 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -1062,8 +1062,8 @@ static void lpuart_copy_rx_to_tty(struct lpuart_port *sport)
unsigned long sr = lpuart32_read(&sport->port, UARTSTAT);
if (sr & (UARTSTAT_PE | UARTSTAT_FE)) {
- /* Read DR to clear the error flags */
- lpuart32_read(&sport->port, UARTDATA);
+ /* Clear the error flags */
+ lpuart32_write(&sport->port, sr, UARTSTAT);
if (sr & UARTSTAT_PE)
sport->port.icount.parity++;
diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c
index e3a8b6c71aa1..210c1d615082 100644
--- a/drivers/usb/cdns3/gadget.c
+++ b/drivers/usb/cdns3/gadget.c
@@ -2041,7 +2041,7 @@ int cdns3_ep_config(struct cdns3_endpoint *priv_ep, bool enable)
u8 mult = 0;
int ret;
- buffering = CDNS3_EP_BUF_SIZE - 1;
+ buffering = priv_dev->ep_buf_size - 1;
cdns3_configure_dmult(priv_dev, priv_ep);
@@ -2060,7 +2060,7 @@ int cdns3_ep_config(struct cdns3_endpoint *priv_ep, bool enable)
break;
default:
ep_cfg = EP_CFG_EPTYPE(USB_ENDPOINT_XFER_ISOC);
- mult = CDNS3_EP_ISO_HS_MULT - 1;
+ mult = priv_dev->ep_iso_burst - 1;
buffering = mult + 1;
}
@@ -2076,14 +2076,14 @@ int cdns3_ep_config(struct cdns3_endpoint *priv_ep, bool enable)
mult = 0;
max_packet_size = 1024;
if (priv_ep->type == USB_ENDPOINT_XFER_ISOC) {
- maxburst = CDNS3_EP_ISO_SS_BURST - 1;
+ maxburst = priv_dev->ep_iso_burst - 1;
buffering = (mult + 1) *
(maxburst + 1);
if (priv_ep->interval > 1)
buffering++;
} else {
- maxburst = CDNS3_EP_BUF_SIZE - 1;
+ maxburst = priv_dev->ep_buf_size - 1;
}
break;
default:
@@ -2098,6 +2098,23 @@ int cdns3_ep_config(struct cdns3_endpoint *priv_ep, bool enable)
else
priv_ep->trb_burst_size = 16;
+ /*
+ * In versions preceding DEV_VER_V2, for example, iMX8QM, there exit the bugs
+ * in the DMA. These bugs occur when the trb_burst_size exceeds 16 and the
+ * address is not aligned to 128 Bytes (which is a product of the 64-bit AXI
+ * and AXI maximum burst length of 16 or 0xF+1, dma_axi_ctrl0[3:0]). This
+ * results in data corruption when it crosses the 4K border. The corruption
+ * specifically occurs from the position (4K - (address & 0x7F)) to 4K.
+ *
+ * So force trb_burst_size to 16 at such platform.
+ */
+ if (priv_dev->dev_ver < DEV_VER_V2)
+ priv_ep->trb_burst_size = 16;
+
+ mult = min_t(u8, mult, EP_CFG_MULT_MAX);
+ buffering = min_t(u8, buffering, EP_CFG_BUFFERING_MAX);
+ maxburst = min_t(u8, maxburst, EP_CFG_MAXBURST_MAX);
+
/* onchip buffer is only allocated before configuration */
if (!priv_dev->hw_configured_flag) {
ret = cdns3_ep_onchip_buffer_reserve(priv_dev, buffering + 1,
@@ -2971,6 +2988,40 @@ static int cdns3_gadget_udc_stop(struct usb_gadget *gadget)
return 0;
}
+/**
+ * cdns3_gadget_check_config - ensure cdns3 can support the USB configuration
+ * @gadget: pointer to the USB gadget
+ *
+ * Used to record the maximum number of endpoints being used in a USB composite
+ * device. (across all configurations) This is to be used in the calculation
+ * of the TXFIFO sizes when resizing internal memory for individual endpoints.
+ * It will help ensured that the resizing logic reserves enough space for at
+ * least one max packet.
+ */
+static int cdns3_gadget_check_config(struct usb_gadget *gadget)
+{
+ struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
+ struct usb_ep *ep;
+ int n_in = 0;
+ int total;
+
+ list_for_each_entry(ep, &gadget->ep_list, ep_list) {
+ if (ep->claimed && (ep->address & USB_DIR_IN))
+ n_in++;
+ }
+
+ /* 2KB are reserved for EP0, 1KB for out*/
+ total = 2 + n_in + 1;
+
+ if (total > priv_dev->onchip_buffers)
+ return -ENOMEM;
+
+ priv_dev->ep_buf_size = priv_dev->ep_iso_burst =
+ (priv_dev->onchip_buffers - 2) / (n_in + 1);
+
+ return 0;
+}
+
static const struct usb_gadget_ops cdns3_gadget_ops = {
.get_frame = cdns3_gadget_get_frame,
.wakeup = cdns3_gadget_wakeup,
@@ -2979,6 +3030,7 @@ static const struct usb_gadget_ops cdns3_gadget_ops = {
.udc_start = cdns3_gadget_udc_start,
.udc_stop = cdns3_gadget_udc_stop,
.match_ep = cdns3_gadget_match_ep,
+ .check_config = cdns3_gadget_check_config,
};
static void cdns3_free_all_eps(struct cdns3_device *priv_dev)
diff --git a/drivers/usb/cdns3/gadget.h b/drivers/usb/cdns3/gadget.h
index 21fa461c518e..32825477edd3 100644
--- a/drivers/usb/cdns3/gadget.h
+++ b/drivers/usb/cdns3/gadget.h
@@ -561,15 +561,18 @@ struct cdns3_usb_regs {
/* Max burst size (used only in SS mode). */
#define EP_CFG_MAXBURST_MASK GENMASK(11, 8)
#define EP_CFG_MAXBURST(p) (((p) << 8) & EP_CFG_MAXBURST_MASK)
+#define EP_CFG_MAXBURST_MAX 15
/* ISO max burst. */
#define EP_CFG_MULT_MASK GENMASK(15, 14)
#define EP_CFG_MULT(p) (((p) << 14) & EP_CFG_MULT_MASK)
+#define EP_CFG_MULT_MAX 2
/* ISO max burst. */
#define EP_CFG_MAXPKTSIZE_MASK GENMASK(26, 16)
#define EP_CFG_MAXPKTSIZE(p) (((p) << 16) & EP_CFG_MAXPKTSIZE_MASK)
/* Max number of buffered packets. */
#define EP_CFG_BUFFERING_MASK GENMASK(31, 27)
#define EP_CFG_BUFFERING(p) (((p) << 27) & EP_CFG_BUFFERING_MASK)
+#define EP_CFG_BUFFERING_MAX 15
/* EP_CMD - bitmasks */
/* Endpoint reset. */
@@ -1093,9 +1096,6 @@ struct cdns3_trb {
#define CDNS3_ENDPOINTS_MAX_COUNT 32
#define CDNS3_EP_ZLP_BUF_SIZE 1024
-#define CDNS3_EP_BUF_SIZE 4 /* KB */
-#define CDNS3_EP_ISO_HS_MULT 3
-#define CDNS3_EP_ISO_SS_BURST 3
#define CDNS3_MAX_NUM_DESCMISS_BUF 32
#define CDNS3_DESCMIS_BUF_SIZE 2048 /* Bytes */
#define CDNS3_WA2_NUM_BUFFERS 128
@@ -1330,6 +1330,9 @@ struct cdns3_device {
/*in KB */
u16 onchip_buffers;
u16 onchip_used_size;
+
+ u16 ep_buf_size;
+ u16 ep_iso_burst;
};
void cdns3_set_register_bit(void __iomem *ptr, u32 mask);
diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
index f79845594284..4d47fe89864d 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.c
+++ b/drivers/usb/chipidea/ci_hdrc_imx.c
@@ -70,6 +70,10 @@ static const struct ci_hdrc_imx_platform_flag imx7ulp_usb_data = {
CI_HDRC_PMQOS,
};
+static const struct ci_hdrc_imx_platform_flag imx8ulp_usb_data = {
+ .flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
+};
+
static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
{ .compatible = "fsl,imx23-usb", .data = &imx23_usb_data},
{ .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
@@ -80,6 +84,7 @@ static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
{ .compatible = "fsl,imx6ul-usb", .data = &imx6ul_usb_data},
{ .compatible = "fsl,imx7d-usb", .data = &imx7d_usb_data},
{ .compatible = "fsl,imx7ulp-usb", .data = &imx7ulp_usb_data},
+ { .compatible = "fsl,imx8ulp-usb", .data = &imx8ulp_usb_data},
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
diff --git a/drivers/usb/chipidea/usbmisc_imx.c b/drivers/usb/chipidea/usbmisc_imx.c
index 425b29168b4d..9b1d5c11dc34 100644
--- a/drivers/usb/chipidea/usbmisc_imx.c
+++ b/drivers/usb/chipidea/usbmisc_imx.c
@@ -135,7 +135,7 @@
#define TXVREFTUNE0_MASK (0xf << 20)
#define MX6_USB_OTG_WAKEUP_BITS (MX6_BM_WAKEUP_ENABLE | MX6_BM_VBUS_WAKEUP | \
- MX6_BM_ID_WAKEUP)
+ MX6_BM_ID_WAKEUP | MX6SX_BM_DPDM_WAKEUP_EN)
struct usbmisc_ops {
/* It's called once when probe a usb device */
diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index ec8c43231746..3973f6c18857 100644
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -306,7 +306,16 @@ static void dwc3_qcom_interconnect_exit(struct dwc3_qcom *qcom)
/* Only usable in contexts where the role can not change. */
static bool dwc3_qcom_is_host(struct dwc3_qcom *qcom)
{
- struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3);
+ struct dwc3 *dwc;
+
+ /*
+ * FIXME: Fix this layering violation.
+ */
+ dwc = platform_get_drvdata(qcom->dwc3);
+
+ /* Core driver may not have probed yet. */
+ if (!dwc)
+ return false;
return dwc->xhci;
}
diff --git a/drivers/usb/gadget/function/u_serial.c b/drivers/usb/gadget/function/u_serial.c
index 3b5a6430e241..a717b53847a8 100644
--- a/drivers/usb/gadget/function/u_serial.c
+++ b/drivers/usb/gadget/function/u_serial.c
@@ -917,8 +917,11 @@ static void __gs_console_push(struct gs_console *cons)
}
req->length = size;
+
+ spin_unlock_irq(&cons->lock);
if (usb_ep_queue(ep, req, GFP_ATOMIC))
req->length = 0;
+ spin_lock_irq(&cons->lock);
}
static void gs_console_work(struct work_struct *work)
diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
index 3a3b5a03dda7..14d9d1ee16fc 100644
--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -1004,6 +1004,25 @@ int usb_gadget_ep_match_desc(struct usb_gadget *gadget,
}
EXPORT_SYMBOL_GPL(usb_gadget_ep_match_desc);
+/**
+ * usb_gadget_check_config - checks if the UDC can support the binded
+ * configuration
+ * @gadget: controller to check the USB configuration
+ *
+ * Ensure that a UDC is able to support the requested resources by a
+ * configuration, and that there are no resource limitations, such as
+ * internal memory allocated to all requested endpoints.
+ *
+ * Returns zero on success, else a negative errno.
+ */
+int usb_gadget_check_config(struct usb_gadget *gadget)
+{
+ if (gadget->ops->check_config)
+ return gadget->ops->check_config(gadget);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(usb_gadget_check_config);
+
/* ------------------------------------------------------------------------- */
static void usb_gadget_state_work(struct work_struct *work)
diff --git a/drivers/video/fbdev/mmp/hw/mmp_ctrl.c b/drivers/video/fbdev/mmp/hw/mmp_ctrl.c
index 061a105afb86..27c3ee5df8de 100644
--- a/drivers/video/fbdev/mmp/hw/mmp_ctrl.c
+++ b/drivers/video/fbdev/mmp/hw/mmp_ctrl.c
@@ -518,7 +518,9 @@ static int mmphw_probe(struct platform_device *pdev)
ret = -ENOENT;
goto failed;
}
- clk_prepare_enable(ctrl->clk);
+ ret = clk_prepare_enable(ctrl->clk);
+ if (ret)
+ goto failed;
/* init global regs */
ctrl_set_default(ctrl);
diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
index e8ef0c66e558..136f90dbad83 100644
--- a/drivers/virtio/virtio_mmio.c
+++ b/drivers/virtio/virtio_mmio.c
@@ -571,11 +571,9 @@ static void virtio_mmio_release_dev(struct device *_d)
{
struct virtio_device *vdev =
container_of(_d, struct virtio_device, dev);
- struct virtio_mmio_device *vm_dev =
- container_of(vdev, struct virtio_mmio_device, vdev);
- struct platform_device *pdev = vm_dev->pdev;
+ struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vdev);
- devm_kfree(&pdev->dev, vm_dev);
+ kfree(vm_dev);
}
/* Platform device */
@@ -586,7 +584,7 @@ static int virtio_mmio_probe(struct platform_device *pdev)
unsigned long magic;
int rc;
- vm_dev = devm_kzalloc(&pdev->dev, sizeof(*vm_dev), GFP_KERNEL);
+ vm_dev = kzalloc(sizeof(*vm_dev), GFP_KERNEL);
if (!vm_dev)
return -ENOMEM;
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 83dca79ff042..b798586263eb 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -4460,8 +4460,7 @@ int btrfs_cancel_balance(struct btrfs_fs_info *fs_info)
}
}
- BUG_ON(fs_info->balance_ctl ||
- test_bit(BTRFS_FS_BALANCE_RUNNING, &fs_info->flags));
+ ASSERT(!test_bit(BTRFS_FS_BALANCE_RUNNING, &fs_info->flags));
atomic_dec(&fs_info->balance_cancel_req);
mutex_unlock(&fs_info->balance_mutex);
return 0;
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 5fe85dc0e265..a56738244f3a 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -4580,9 +4580,9 @@ static int cifs_readpage_worker(struct file *file, struct page *page,
io_error:
kunmap(page);
- unlock_page(page);
read_complete:
+ unlock_page(page);
return rc;
}
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index e01b6a2d12d3..b61de8dab51a 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -1017,7 +1017,14 @@ static int gfs2_show_options(struct seq_file *s, struct dentry *root)
{
struct gfs2_sbd *sdp = root->d_sb->s_fs_info;
struct gfs2_args *args = &sdp->sd_args;
- int val;
+ unsigned int logd_secs, statfs_slow, statfs_quantum, quota_quantum;
+
+ spin_lock(&sdp->sd_tune.gt_spin);
+ logd_secs = sdp->sd_tune.gt_logd_secs;
+ quota_quantum = sdp->sd_tune.gt_quota_quantum;
+ statfs_quantum = sdp->sd_tune.gt_statfs_quantum;
+ statfs_slow = sdp->sd_tune.gt_statfs_slow;
+ spin_unlock(&sdp->sd_tune.gt_spin);
if (is_ancestor(root, sdp->sd_master_dir))
seq_puts(s, ",meta");
@@ -1072,17 +1079,14 @@ static int gfs2_show_options(struct seq_file *s, struct dentry *root)
}
if (args->ar_discard)
seq_puts(s, ",discard");
- val = sdp->sd_tune.gt_logd_secs;
- if (val != 30)
- seq_printf(s, ",commit=%d", val);
- val = sdp->sd_tune.gt_statfs_quantum;
- if (val != 30)
- seq_printf(s, ",statfs_quantum=%d", val);
- else if (sdp->sd_tune.gt_statfs_slow)
+ if (logd_secs != 30)
+ seq_printf(s, ",commit=%d", logd_secs);
+ if (statfs_quantum != 30)
+ seq_printf(s, ",statfs_quantum=%d", statfs_quantum);
+ else if (statfs_slow)
seq_puts(s, ",statfs_quantum=0");
- val = sdp->sd_tune.gt_quota_quantum;
- if (val != 60)
- seq_printf(s, ",quota_quantum=%d", val);
+ if (quota_quantum != 60)
+ seq_printf(s, ",quota_quantum=%d", quota_quantum);
if (args->ar_statfs_percent)
seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent);
if (args->ar_errors != GFS2_ERRORS_DEFAULT) {
diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c
index bd9af2be352f..cef3303d9499 100644
--- a/fs/jfs/jfs_dmap.c
+++ b/fs/jfs/jfs_dmap.c
@@ -2027,6 +2027,9 @@ dbAllocDmapLev(struct bmap * bmp,
if (dbFindLeaf((dmtree_t *) & dp->tree, l2nb, &leafidx))
return -ENOSPC;
+ if (leafidx < 0)
+ return -EIO;
+
/* determine the block number within the file system corresponding
* to the leaf at which free space was found.
*/
diff --git a/fs/jfs/jfs_txnmgr.c b/fs/jfs/jfs_txnmgr.c
index c8ce7f1bc594..6f6a5b9203d3 100644
--- a/fs/jfs/jfs_txnmgr.c
+++ b/fs/jfs/jfs_txnmgr.c
@@ -354,6 +354,11 @@ tid_t txBegin(struct super_block *sb, int flag)
jfs_info("txBegin: flag = 0x%x", flag);
log = JFS_SBI(sb)->log;
+ if (!log) {
+ jfs_error(sb, "read-only filesystem\n");
+ return 0;
+ }
+
TXN_LOCK();
INCREMENT(TxStat.txBegin);
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index 7a55d14cc1af..f155ad6650bd 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -798,6 +798,11 @@ static int jfs_link(struct dentry *old_dentry,
if (rc)
goto out;
+ if (isReadOnly(ip)) {
+ jfs_error(ip->i_sb, "read-only filesystem\n");
+ return -EROFS;
+ }
+
tid = txBegin(ip->i_sb, 0);
mutex_lock_nested(&JFS_IP(dir)->commit_mutex, COMMIT_MUTEX_PARENT);
diff --git a/fs/overlayfs/ovl_entry.h b/fs/overlayfs/ovl_entry.h
index b208eba5d0b6..b58a0140d78d 100644
--- a/fs/overlayfs/ovl_entry.h
+++ b/fs/overlayfs/ovl_entry.h
@@ -30,6 +30,7 @@ struct ovl_sb {
};
struct ovl_layer {
+ /* ovl_free_fs() relies on @mnt being the first member! */
struct vfsmount *mnt;
/* Trap in ovl inode cache */
struct inode *trap;
@@ -40,6 +41,14 @@ struct ovl_layer {
int fsid;
};
+/*
+ * ovl_free_fs() relies on @mnt being the first member when unmounting
+ * the private mounts created for each layer. Let's check both the
+ * offset and type.
+ */
+static_assert(offsetof(struct ovl_layer, mnt) == 0);
+static_assert(__same_type(typeof_member(struct ovl_layer, mnt), struct vfsmount *));
+
struct ovl_path {
const struct ovl_layer *layer;
struct dentry *dentry;
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index ad255f8ab5c5..8d0cd68fc90a 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -557,7 +557,7 @@ static void invalidate_dquots(struct super_block *sb, int type)
continue;
/* Wait for dquot users */
if (atomic_read(&dquot->dq_count)) {
- dqgrab(dquot);
+ atomic_inc(&dquot->dq_count);
spin_unlock(&dq_list_lock);
/*
* Once dqput() wakes us up, we know it's time to free
@@ -2415,7 +2415,8 @@ int dquot_load_quota_sb(struct super_block *sb, int type, int format_id,
error = add_dquot_ref(sb, type);
if (error)
- dquot_disable(sb, type, flags);
+ dquot_disable(sb, type,
+ DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
return error;
out_fmt:
diff --git a/fs/udf/unicode.c b/fs/udf/unicode.c
index 622569007b53..2142cbd1dde2 100644
--- a/fs/udf/unicode.c
+++ b/fs/udf/unicode.c
@@ -247,7 +247,7 @@ static int udf_name_from_CS0(struct super_block *sb,
}
if (translate) {
- if (str_o_len <= 2 && str_o[0] == '.' &&
+ if (str_o_len > 0 && str_o_len <= 2 && str_o[0] == '.' &&
(str_o_len == 1 || str_o[1] == '.'))
needsCRC = 1;
if (needsCRC) {
diff --git a/include/dt-bindings/iio/addac/adi,ad74413r.h b/include/dt-bindings/iio/addac/adi,ad74413r.h
new file mode 100644
index 000000000000..204f92bbd79f
--- /dev/null
+++ b/include/dt-bindings/iio/addac/adi,ad74413r.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _DT_BINDINGS_ADI_AD74413R_H
+#define _DT_BINDINGS_ADI_AD74413R_H
+
+#define CH_FUNC_HIGH_IMPEDANCE 0x0
+#define CH_FUNC_VOLTAGE_OUTPUT 0x1
+#define CH_FUNC_CURRENT_OUTPUT 0x2
+#define CH_FUNC_VOLTAGE_INPUT 0x3
+#define CH_FUNC_CURRENT_INPUT_EXT_POWER 0x4
+#define CH_FUNC_CURRENT_INPUT_LOOP_POWER 0x5
+#define CH_FUNC_RESISTANCE_INPUT 0x6
+#define CH_FUNC_DIGITAL_INPUT_LOGIC 0x7
+#define CH_FUNC_DIGITAL_INPUT_LOOP_POWER 0x8
+#define CH_FUNC_CURRENT_INPUT_EXT_POWER_HART 0x9
+#define CH_FUNC_CURRENT_INPUT_LOOP_POWER_HART 0xA
+
+#define CH_FUNC_MIN CH_FUNC_HIGH_IMPEDANCE
+#define CH_FUNC_MAX CH_FUNC_CURRENT_INPUT_LOOP_POWER_HART
+
+#endif /* _DT_BINDINGS_ADI_AD74413R_H */
diff --git a/include/linux/iopoll.h b/include/linux/iopoll.h
index 2c8860e406bd..0417360a6db9 100644
--- a/include/linux/iopoll.h
+++ b/include/linux/iopoll.h
@@ -53,6 +53,7 @@
} \
if (__sleep_us) \
usleep_range((__sleep_us >> 2) + 1, __sleep_us); \
+ cpu_relax(); \
} \
(cond) ? 0 : -ETIMEDOUT; \
})
@@ -95,6 +96,7 @@
} \
if (__delay_us) \
udelay(__delay_us); \
+ cpu_relax(); \
} \
(cond) ? 0 : -ETIMEDOUT; \
})
diff --git a/include/linux/mhi.h b/include/linux/mhi.h
index d4841e5a5f45..5d9f8c6f3d40 100644
--- a/include/linux/mhi.h
+++ b/include/linux/mhi.h
@@ -303,6 +303,7 @@ struct mhi_controller_config {
* @rddm_size: RAM dump size that host should allocate for debugging purpose
* @sbl_size: SBL image size downloaded through BHIe (optional)
* @seg_len: BHIe vector size (optional)
+ * @reg_len: Length of the MHI MMIO region (required)
* @fbc_image: Points to firmware image buffer
* @rddm_image: Points to RAM dump buffer
* @mhi_chan: Points to the channel configuration table
@@ -383,6 +384,7 @@ struct mhi_controller {
size_t rddm_size;
size_t sbl_size;
size_t seg_len;
+ size_t reg_len;
struct image_info *fbc_image;
struct image_info *rddm_image;
struct mhi_chan *mhi_chan;
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index ae88362216a4..4f95b98215d8 100644
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -644,18 +644,22 @@ struct mlx5_pps {
u8 enabled;
};
-struct mlx5_clock {
- struct mlx5_nb pps_nb;
- seqlock_t lock;
+struct mlx5_timer {
struct cyclecounter cycles;
struct timecounter tc;
- struct hwtstamp_config hwtstamp_config;
u32 nominal_c_mult;
unsigned long overflow_period;
struct delayed_work overflow_work;
+};
+
+struct mlx5_clock {
+ struct mlx5_nb pps_nb;
+ seqlock_t lock;
+ struct hwtstamp_config hwtstamp_config;
struct ptp_clock *ptp;
struct ptp_clock_info ptp_info;
struct mlx5_pps pps_info;
+ struct mlx5_timer timer;
};
struct mlx5_dm;
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 40d7e98fc990..fb294cbb9081 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -477,6 +477,7 @@ struct mmc_host {
struct device_node;
struct mmc_host *mmc_alloc_host(int extra, struct device *);
+struct mmc_host *devm_mmc_alloc_host(struct device *dev, int extra);
int mmc_add_host(struct mmc_host *);
void mmc_remove_host(struct mmc_host *);
void mmc_free_host(struct mmc_host *);
diff --git a/include/linux/objtool.h b/include/linux/objtool.h
index 662f19374bd9..d17fa7f4001d 100644
--- a/include/linux/objtool.h
+++ b/include/linux/objtool.h
@@ -71,6 +71,23 @@ struct unwind_hint {
static void __used __section(".discard.func_stack_frame_non_standard") \
*__func_stack_frame_non_standard_##func = func
+/*
+ * STACK_FRAME_NON_STANDARD_FP() is a frame-pointer-specific function ignore
+ * for the case where a function is intentionally missing frame pointer setup,
+ * but otherwise needs objtool/ORC coverage when frame pointers are disabled.
+ */
+#ifdef CONFIG_FRAME_POINTER
+#define STACK_FRAME_NON_STANDARD_FP(func) STACK_FRAME_NON_STANDARD(func)
+#else
+#define STACK_FRAME_NON_STANDARD_FP(func)
+#endif
+
+#define ANNOTATE_NOENDBR \
+ "986: \n\t" \
+ ".pushsection .discard.noendbr\n\t" \
+ _ASM_PTR " 986b\n\t" \
+ ".popsection\n\t"
+
#else /* __ASSEMBLY__ */
/*
@@ -117,6 +134,13 @@ struct unwind_hint {
.popsection
.endm
+.macro ANNOTATE_NOENDBR
+.Lhere_\@:
+ .pushsection .discard.noendbr
+ .quad .Lhere_\@
+ .popsection
+.endm
+
#endif /* __ASSEMBLY__ */
#else /* !CONFIG_STACK_VALIDATION */
@@ -126,10 +150,14 @@ struct unwind_hint {
#define UNWIND_HINT(sp_reg, sp_offset, type, end) \
"\n\t"
#define STACK_FRAME_NON_STANDARD(func)
+#define STACK_FRAME_NON_STANDARD_FP(func)
+#define ANNOTATE_NOENDBR
#else
#define ANNOTATE_INTRA_FUNCTION_CALL
.macro UNWIND_HINT type:req sp_reg=0 sp_offset=0 end=0
.endm
+.macro ANNOTATE_NOENDBR
+.endm
#endif
#endif /* CONFIG_STACK_VALIDATION */
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index e7351d64f11f..11df3d5b40c6 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -326,6 +326,7 @@ struct usb_gadget_ops {
struct usb_ep *(*match_ep)(struct usb_gadget *,
struct usb_endpoint_descriptor *,
struct usb_ss_ep_comp_descriptor *);
+ int (*check_config)(struct usb_gadget *gadget);
};
/**
@@ -596,6 +597,7 @@ int usb_gadget_connect(struct usb_gadget *gadget);
int usb_gadget_disconnect(struct usb_gadget *gadget);
int usb_gadget_deactivate(struct usb_gadget *gadget);
int usb_gadget_activate(struct usb_gadget *gadget);
+int usb_gadget_check_config(struct usb_gadget *gadget);
#else
static inline int usb_gadget_frame_number(struct usb_gadget *gadget)
{ return 0; }
@@ -619,6 +621,8 @@ static inline int usb_gadget_deactivate(struct usb_gadget *gadget)
{ return 0; }
static inline int usb_gadget_activate(struct usb_gadget *gadget)
{ return 0; }
+static inline int usb_gadget_check_config(struct usb_gadget *gadget)
+{ return 0; }
#endif /* CONFIG_USB_GADGET */
/*-------------------------------------------------------------------------*/
diff --git a/include/linux/virtio_net.h b/include/linux/virtio_net.h
index a960de68ac69..6047058d6703 100644
--- a/include/linux/virtio_net.h
+++ b/include/linux/virtio_net.h
@@ -148,6 +148,10 @@ static inline int virtio_net_hdr_to_skb(struct sk_buff *skb,
if (gso_type & SKB_GSO_UDP)
nh_off -= thlen;
+ /* Kernel has a special handling for GSO_BY_FRAGS. */
+ if (gso_size == GSO_BY_FRAGS)
+ return -EINVAL;
+
/* Too small packets are not really GSO ones. */
if (skb->len - nh_off > gso_size) {
shinfo->gso_size = gso_size;
diff --git a/include/media/v4l2-mem2mem.h b/include/media/v4l2-mem2mem.h
index 5a91b548ecc0..8d52c4506762 100644
--- a/include/media/v4l2-mem2mem.h
+++ b/include/media/v4l2-mem2mem.h
@@ -588,7 +588,14 @@ void v4l2_m2m_buf_queue(struct v4l2_m2m_ctx *m2m_ctx,
static inline
unsigned int v4l2_m2m_num_src_bufs_ready(struct v4l2_m2m_ctx *m2m_ctx)
{
- return m2m_ctx->out_q_ctx.num_rdy;
+ unsigned int num_buf_rdy;
+ unsigned long flags;
+
+ spin_lock_irqsave(&m2m_ctx->out_q_ctx.rdy_spinlock, flags);
+ num_buf_rdy = m2m_ctx->out_q_ctx.num_rdy;
+ spin_unlock_irqrestore(&m2m_ctx->out_q_ctx.rdy_spinlock, flags);
+
+ return num_buf_rdy;
}
/**
@@ -600,7 +607,14 @@ unsigned int v4l2_m2m_num_src_bufs_ready(struct v4l2_m2m_ctx *m2m_ctx)
static inline
unsigned int v4l2_m2m_num_dst_bufs_ready(struct v4l2_m2m_ctx *m2m_ctx)
{
- return m2m_ctx->cap_q_ctx.num_rdy;
+ unsigned int num_buf_rdy;
+ unsigned long flags;
+
+ spin_lock_irqsave(&m2m_ctx->cap_q_ctx.rdy_spinlock, flags);
+ num_buf_rdy = m2m_ctx->cap_q_ctx.num_rdy;
+ spin_unlock_irqrestore(&m2m_ctx->cap_q_ctx.rdy_spinlock, flags);
+
+ return num_buf_rdy;
}
/**
diff --git a/include/net/sock.h b/include/net/sock.h
index 1fb5c535537c..665e38859375 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1346,6 +1346,12 @@ static inline bool sk_has_memory_pressure(const struct sock *sk)
return sk->sk_prot->memory_pressure != NULL;
}
+static inline bool sk_under_global_memory_pressure(const struct sock *sk)
+{
+ return sk->sk_prot->memory_pressure &&
+ !!*sk->sk_prot->memory_pressure;
+}
+
static inline bool sk_under_memory_pressure(const struct sock *sk)
{
if (!sk->sk_prot->memory_pressure)
diff --git a/kernel/dma/remap.c b/kernel/dma/remap.c
index 905c3fa005f1..5bff06199310 100644
--- a/kernel/dma/remap.c
+++ b/kernel/dma/remap.c
@@ -43,13 +43,13 @@ void *dma_common_contiguous_remap(struct page *page, size_t size,
void *vaddr;
int i;
- pages = kmalloc_array(count, sizeof(struct page *), GFP_KERNEL);
+ pages = kvmalloc_array(count, sizeof(struct page *), GFP_KERNEL);
if (!pages)
return NULL;
for (i = 0; i < count; i++)
pages[i] = nth_page(page, i);
vaddr = vmap(pages, count, VM_DMA_COHERENT, prot);
- kfree(pages);
+ kvfree(pages);
return vaddr;
}
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 3b8c53264441..f8126fa0630e 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -541,6 +541,7 @@ struct trace_buffer {
unsigned flags;
int cpus;
atomic_t record_disabled;
+ atomic_t resizing;
cpumask_var_t cpumask;
struct lock_class_key *reader_lock_key;
@@ -2041,7 +2042,7 @@ int ring_buffer_resize(struct trace_buffer *buffer, unsigned long size,
/* prevent another thread from changing buffer sizes */
mutex_lock(&buffer->mutex);
-
+ atomic_inc(&buffer->resizing);
if (cpu_id == RING_BUFFER_ALL_CPUS) {
/*
@@ -2184,6 +2185,7 @@ int ring_buffer_resize(struct trace_buffer *buffer, unsigned long size,
atomic_dec(&buffer->record_disabled);
}
+ atomic_dec(&buffer->resizing);
mutex_unlock(&buffer->mutex);
return 0;
@@ -2204,6 +2206,7 @@ int ring_buffer_resize(struct trace_buffer *buffer, unsigned long size,
}
}
out_err_unlock:
+ atomic_dec(&buffer->resizing);
mutex_unlock(&buffer->mutex);
return err;
}
@@ -5253,6 +5256,15 @@ int ring_buffer_swap_cpu(struct trace_buffer *buffer_a,
if (local_read(&cpu_buffer_b->committing))
goto out_dec;
+ /*
+ * When resize is in progress, we cannot swap it because
+ * it will mess the state of the cpu buffer.
+ */
+ if (atomic_read(&buffer_a->resizing))
+ goto out_dec;
+ if (atomic_read(&buffer_b->resizing))
+ goto out_dec;
+
buffer_a->buffers[cpu] = cpu_buffer_b;
buffer_b->buffers[cpu] = cpu_buffer_a;
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 7e99319bd536..167f2a19fd8a 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -1882,9 +1882,10 @@ update_max_tr_single(struct trace_array *tr, struct task_struct *tsk, int cpu)
* place on this CPU. We fail to record, but we reset
* the max trace buffer (no one writes directly to it)
* and flag that it failed.
+ * Another reason is resize is in progress.
*/
trace_array_printk_buf(tr->max_buffer.buffer, _THIS_IP_,
- "Failed to swap buffers due to commit in progress\n");
+ "Failed to swap buffers due to commit or resize in progress\n");
}
WARN_ON_ONCE(ret && ret != -EAGAIN && ret != -EBUSY);
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 41dd17390c73..b882c6519b03 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -1332,9 +1332,10 @@ probe_mem_read(void *dest, void *src, size_t size)
/* Note that we don't verify it, since the code does not come from user space */
static int
-process_fetch_insn(struct fetch_insn *code, struct pt_regs *regs, void *dest,
+process_fetch_insn(struct fetch_insn *code, void *rec, void *dest,
void *base)
{
+ struct pt_regs *regs = rec;
unsigned long val;
retry:
diff --git a/kernel/trace/trace_probe_tmpl.h b/kernel/trace/trace_probe_tmpl.h
index 29348874ebde..cf14a37dff8c 100644
--- a/kernel/trace/trace_probe_tmpl.h
+++ b/kernel/trace/trace_probe_tmpl.h
@@ -54,7 +54,7 @@ fetch_apply_bitfield(struct fetch_insn *code, void *buf)
* If dest is NULL, don't store result and return required dynamic data size.
*/
static int
-process_fetch_insn(struct fetch_insn *code, struct pt_regs *regs,
+process_fetch_insn(struct fetch_insn *code, void *rec,
void *dest, void *base);
static nokprobe_inline int fetch_store_strlen(unsigned long addr);
static nokprobe_inline int
@@ -190,7 +190,7 @@ __get_data_size(struct trace_probe *tp, struct pt_regs *regs)
/* Store the value of each argument */
static nokprobe_inline void
-store_trace_args(void *data, struct trace_probe *tp, struct pt_regs *regs,
+store_trace_args(void *data, struct trace_probe *tp, void *rec,
int header_size, int maxlen)
{
struct probe_arg *arg;
@@ -205,12 +205,14 @@ store_trace_args(void *data, struct trace_probe *tp, struct pt_regs *regs,
/* Point the dynamic data area if needed */
if (unlikely(arg->dynamic))
*dl = make_data_loc(maxlen, dyndata - base);
- ret = process_fetch_insn(arg->code, regs, dl, base);
- if (unlikely(ret < 0 && arg->dynamic)) {
- *dl = make_data_loc(0, dyndata - base);
- } else {
- dyndata += ret;
- maxlen -= ret;
+ ret = process_fetch_insn(arg->code, rec, dl, base);
+ if (arg->dynamic) {
+ if (unlikely(ret < 0)) {
+ *dl = make_data_loc(0, dyndata - base);
+ } else {
+ dyndata += ret;
+ maxlen -= ret;
+ }
}
}
}
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
index 9900d4e3808c..f6c47361c154 100644
--- a/kernel/trace/trace_uprobe.c
+++ b/kernel/trace/trace_uprobe.c
@@ -217,9 +217,10 @@ static unsigned long translate_user_vaddr(unsigned long file_offset)
/* Note that we don't verify it, since the code does not come from user space */
static int
-process_fetch_insn(struct fetch_insn *code, struct pt_regs *regs, void *dest,
+process_fetch_insn(struct fetch_insn *code, void *rec, void *dest,
void *base)
{
+ struct pt_regs *regs = rec;
unsigned long val;
/* 1st stage: get value from context */
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 568f0f072b3d..7b40e4737a2b 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -6370,9 +6370,14 @@ static inline int l2cap_le_command_rej(struct l2cap_conn *conn,
if (!chan)
goto done;
+ chan = l2cap_chan_hold_unless_zero(chan);
+ if (!chan)
+ goto done;
+
l2cap_chan_lock(chan);
l2cap_chan_del(chan, ECONNREFUSED);
l2cap_chan_unlock(chan);
+ l2cap_chan_put(chan);
done:
mutex_unlock(&conn->chan_lock);
diff --git a/net/core/sock.c b/net/core/sock.c
index 98f4b4a80de4..742356cfd07c 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -2724,7 +2724,7 @@ void __sk_mem_reduce_allocated(struct sock *sk, int amount)
if (mem_cgroup_sockets_enabled && sk->sk_memcg)
mem_cgroup_uncharge_skmem(sk->sk_memcg, amount);
- if (sk_under_memory_pressure(sk) &&
+ if (sk_under_global_memory_pressure(sk) &&
(sk_memory_allocated(sk) < sk_prot_mem_limits(sk, 0)))
sk_leave_memory_pressure(sk);
}
diff --git a/net/ipv4/ip_vti.c b/net/ipv4/ip_vti.c
index 84a818b09bee..90f349be4848 100644
--- a/net/ipv4/ip_vti.c
+++ b/net/ipv4/ip_vti.c
@@ -285,12 +285,12 @@ static netdev_tx_t vti_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
switch (skb->protocol) {
case htons(ETH_P_IP):
- xfrm_decode_session(skb, &fl, AF_INET);
memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
+ xfrm_decode_session(skb, &fl, AF_INET);
break;
case htons(ETH_P_IPV6):
- xfrm_decode_session(skb, &fl, AF_INET6);
memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));
+ xfrm_decode_session(skb, &fl, AF_INET6);
break;
default:
goto tx_err;
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index 715fdfa3e2ae..d2e07bb30164 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -582,7 +582,9 @@ void tcp_retransmit_timer(struct sock *sk)
tcp_stream_is_thin(tp) &&
icsk->icsk_retransmits <= TCP_THIN_LINEAR_RETRIES) {
icsk->icsk_backoff = 0;
- icsk->icsk_rto = min(__tcp_set_rto(tp), TCP_RTO_MAX);
+ icsk->icsk_rto = clamp(__tcp_set_rto(tp),
+ tcp_rto_min(sk),
+ TCP_RTO_MAX);
} else {
/* Use normal (exponential) backoff */
icsk->icsk_rto = min(icsk->icsk_rto << 1, TCP_RTO_MAX);
diff --git a/net/ipv6/ip6_vti.c b/net/ipv6/ip6_vti.c
index 99f2dc802e36..162ba065d476 100644
--- a/net/ipv6/ip6_vti.c
+++ b/net/ipv6/ip6_vti.c
@@ -567,12 +567,12 @@ vti6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
vti6_addr_conflict(t, ipv6_hdr(skb)))
goto tx_err;
- xfrm_decode_session(skb, &fl, AF_INET6);
memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));
+ xfrm_decode_session(skb, &fl, AF_INET6);
break;
case htons(ETH_P_IP):
- xfrm_decode_session(skb, &fl, AF_INET);
memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
+ xfrm_decode_session(skb, &fl, AF_INET);
break;
default:
goto tx_err;
diff --git a/net/key/af_key.c b/net/key/af_key.c
index fff2bd5f03e3..f42854973ba8 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -1852,9 +1852,9 @@ static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_ms
if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];
- if ((xfilter->sadb_x_filter_splen >=
+ if ((xfilter->sadb_x_filter_splen >
(sizeof(xfrm_address_t) << 3)) ||
- (xfilter->sadb_x_filter_dplen >=
+ (xfilter->sadb_x_filter_dplen >
(sizeof(xfrm_address_t) << 3))) {
mutex_unlock(&pfk->dump_lock);
return -EINVAL;
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index 29ec3ef63edc..d0b64c36471d 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -1802,6 +1802,7 @@ static int
proc_do_sync_threshold(struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
+ struct netns_ipvs *ipvs = table->extra2;
int *valp = table->data;
int val[2];
int rc;
@@ -1811,6 +1812,7 @@ proc_do_sync_threshold(struct ctl_table *table, int write,
.mode = table->mode,
};
+ mutex_lock(&ipvs->sync_mutex);
memcpy(val, valp, sizeof(val));
rc = proc_dointvec(&tmp, write, buffer, lenp, ppos);
if (write) {
@@ -1820,6 +1822,7 @@ proc_do_sync_threshold(struct ctl_table *table, int write,
else
memcpy(valp, val, sizeof(val));
}
+ mutex_unlock(&ipvs->sync_mutex);
return rc;
}
@@ -4077,6 +4080,7 @@ static int __net_init ip_vs_control_net_init_sysctl(struct netns_ipvs *ipvs)
ipvs->sysctl_sync_threshold[0] = DEFAULT_SYNC_THRESHOLD;
ipvs->sysctl_sync_threshold[1] = DEFAULT_SYNC_PERIOD;
tbl[idx].data = &ipvs->sysctl_sync_threshold;
+ tbl[idx].extra2 = ipvs;
tbl[idx++].maxlen = sizeof(ipvs->sysctl_sync_threshold);
ipvs->sysctl_sync_refresh_period = DEFAULT_SYNC_REFRESH_PERIOD;
tbl[idx++].data = &ipvs->sysctl_sync_refresh_period;
diff --git a/net/netfilter/nf_conntrack_proto_sctp.c b/net/netfilter/nf_conntrack_proto_sctp.c
index cec4b16170a0..21cbaf6dac33 100644
--- a/net/netfilter/nf_conntrack_proto_sctp.c
+++ b/net/netfilter/nf_conntrack_proto_sctp.c
@@ -49,8 +49,8 @@ static const unsigned int sctp_timeouts[SCTP_CONNTRACK_MAX] = {
[SCTP_CONNTRACK_COOKIE_WAIT] = 3 SECS,
[SCTP_CONNTRACK_COOKIE_ECHOED] = 3 SECS,
[SCTP_CONNTRACK_ESTABLISHED] = 210 SECS,
- [SCTP_CONNTRACK_SHUTDOWN_SENT] = 300 SECS / 1000,
- [SCTP_CONNTRACK_SHUTDOWN_RECD] = 300 SECS / 1000,
+ [SCTP_CONNTRACK_SHUTDOWN_SENT] = 3 SECS,
+ [SCTP_CONNTRACK_SHUTDOWN_RECD] = 3 SECS,
[SCTP_CONNTRACK_SHUTDOWN_ACK_SENT] = 3 SECS,
[SCTP_CONNTRACK_HEARTBEAT_SENT] = 30 SECS,
};
@@ -105,7 +105,7 @@ static const u8 sctp_conntracks[2][11][SCTP_CONNTRACK_MAX] = {
{
/* ORIGINAL */
/* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA, sHS */
-/* init */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA, sCW},
+/* init */ {sCL, sCL, sCW, sCE, sES, sCL, sCL, sSA, sCW},
/* init_ack */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA, sCL},
/* abort */ {sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL},
/* shutdown */ {sCL, sCL, sCW, sCE, sSS, sSS, sSR, sSA, sCL},
diff --git a/net/netfilter/nft_dynset.c b/net/netfilter/nft_dynset.c
index 8d47782b778f..408b7f5faa5e 100644
--- a/net/netfilter/nft_dynset.c
+++ b/net/netfilter/nft_dynset.c
@@ -138,6 +138,9 @@ static int nft_dynset_init(const struct nft_ctx *ctx,
if (IS_ERR(set))
return PTR_ERR(set);
+ if (set->flags & NFT_SET_OBJECT)
+ return -EOPNOTSUPP;
+
if (set->ops->update == NULL)
return -EOPNOTSUPP;
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 3aa783a23c5f..8d941cbba5cb 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -2008,6 +2008,7 @@ static ssize_t unix_stream_sendpage(struct socket *socket, struct page *page,
if (false) {
alloc_skb:
+ spin_unlock(&other->sk_receive_queue.lock);
unix_state_unlock(other);
mutex_unlock(&unix_sk(other)->iolock);
newskb = sock_alloc_send_pskb(sk, 0, 0, flags & MSG_DONTWAIT,
@@ -2047,6 +2048,7 @@ static ssize_t unix_stream_sendpage(struct socket *socket, struct page *page,
init_scm = false;
}
+ spin_lock(&other->sk_receive_queue.lock);
skb = skb_peek_tail(&other->sk_receive_queue);
if (tail && tail == skb) {
skb = newskb;
@@ -2077,14 +2079,11 @@ static ssize_t unix_stream_sendpage(struct socket *socket, struct page *page,
refcount_add(size, &sk->sk_wmem_alloc);
if (newskb) {
- err = unix_scm_to_skb(&scm, skb, false);
- if (err)
- goto err_state_unlock;
- spin_lock(&other->sk_receive_queue.lock);
+ unix_scm_to_skb(&scm, skb, false);
__skb_queue_tail(&other->sk_receive_queue, newskb);
- spin_unlock(&other->sk_receive_queue.lock);
}
+ spin_unlock(&other->sk_receive_queue.lock);
unix_state_unlock(other);
mutex_unlock(&unix_sk(other)->iolock);
diff --git a/net/xfrm/xfrm_compat.c b/net/xfrm/xfrm_compat.c
index 8cbf45a8bcdc..655fe4ff8621 100644
--- a/net/xfrm/xfrm_compat.c
+++ b/net/xfrm/xfrm_compat.c
@@ -108,7 +108,7 @@ static const struct nla_policy compat_policy[XFRMA_MAX+1] = {
[XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
[XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
[XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
- [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
+ [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_user_sec_ctx) },
[XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
[XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
[XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
diff --git a/net/xfrm/xfrm_interface_core.c b/net/xfrm/xfrm_interface_core.c
index e4f21a692415..4eeec3367575 100644
--- a/net/xfrm/xfrm_interface_core.c
+++ b/net/xfrm/xfrm_interface_core.c
@@ -403,8 +403,8 @@ static netdev_tx_t xfrmi_xmit(struct sk_buff *skb, struct net_device *dev)
switch (skb->protocol) {
case htons(ETH_P_IPV6):
- xfrm_decode_session(skb, &fl, AF_INET6);
memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));
+ xfrm_decode_session(skb, &fl, AF_INET6);
if (!dst) {
fl.u.ip6.flowi6_oif = dev->ifindex;
fl.u.ip6.flowi6_flags |= FLOWI_FLAG_ANYSRC;
@@ -418,8 +418,8 @@ static netdev_tx_t xfrmi_xmit(struct sk_buff *skb, struct net_device *dev)
}
break;
case htons(ETH_P_IP):
- xfrm_decode_session(skb, &fl, AF_INET);
memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
+ xfrm_decode_session(skb, &fl, AF_INET);
if (!dst) {
struct rtable *rt;
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index c6bf3898d1bf..8fce2e93bb3b 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -527,7 +527,7 @@ static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
struct nlattr *mt = attrs[XFRMA_MTIMER_THRESH];
- if (re) {
+ if (re && x->replay_esn && x->preplay_esn) {
struct xfrm_replay_state_esn *replay_esn;
replay_esn = nla_data(re);
memcpy(x->replay_esn, replay_esn,
@@ -1062,6 +1062,15 @@ static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
sizeof(*filter), GFP_KERNEL);
if (filter == NULL)
return -ENOMEM;
+
+ /* see addr_match(), (prefix length >> 5) << 2
+ * will be used to compare xfrm_address_t
+ */
+ if (filter->splen > (sizeof(xfrm_address_t) << 3) ||
+ filter->dplen > (sizeof(xfrm_address_t) << 3)) {
+ kfree(filter);
+ return -EINVAL;
+ }
}
if (attrs[XFRMA_PROTO])
@@ -2728,7 +2737,7 @@ const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
[XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
[XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
[XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
- [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
+ [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_user_sec_ctx) },
[XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
[XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
[XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
@@ -2748,6 +2757,7 @@ const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
[XFRMA_SET_MARK] = { .type = NLA_U32 },
[XFRMA_SET_MARK_MASK] = { .type = NLA_U32 },
[XFRMA_IF_ID] = { .type = NLA_U32 },
+ [XFRMA_MTIMER_THRESH] = { .type = NLA_U32 },
};
EXPORT_SYMBOL_GPL(xfrma_policy);
diff --git a/security/integrity/ima/Kconfig b/security/integrity/ima/Kconfig
index 755af0b29e75..0a5ae1e8da47 100644
--- a/security/integrity/ima/Kconfig
+++ b/security/integrity/ima/Kconfig
@@ -8,7 +8,7 @@ config IMA
select CRYPTO_HMAC
select CRYPTO_SHA1
select CRYPTO_HASH_INFO
- select TCG_TPM if HAS_IOMEM && !UML
+ select TCG_TPM if HAS_IOMEM
select TCG_TIS if TCG_TPM && X86
select TCG_CRB if TCG_TPM && ACPI
select TCG_IBMVTPM if TCG_TPM && PPC_PSERIES
diff --git a/sound/hda/hdac_regmap.c b/sound/hda/hdac_regmap.c
index d75f31eb9d78..bf35acca5ea0 100644
--- a/sound/hda/hdac_regmap.c
+++ b/sound/hda/hdac_regmap.c
@@ -597,10 +597,9 @@ EXPORT_SYMBOL_GPL(snd_hdac_regmap_update_raw_once);
*/
void snd_hdac_regmap_sync(struct hdac_device *codec)
{
- if (codec->regmap) {
- mutex_lock(&codec->regmap_lock);
+ mutex_lock(&codec->regmap_lock);
+ if (codec->regmap)
regcache_sync(codec->regmap);
- mutex_unlock(&codec->regmap_lock);
- }
+ mutex_unlock(&codec->regmap_lock);
}
EXPORT_SYMBOL_GPL(snd_hdac_regmap_sync);
diff --git a/sound/pci/emu10k1/emufx.c b/sound/pci/emu10k1/emufx.c
index 4e76ed0e91d5..e17b93b25d2f 100644
--- a/sound/pci/emu10k1/emufx.c
+++ b/sound/pci/emu10k1/emufx.c
@@ -1560,14 +1560,8 @@ A_OP(icode, &ptr, iMAC0, A_GPR(var), A_GPR(var), A_GPR(vol), A_EXTIN(input))
gpr += 2;
/* Master volume (will be renamed later) */
- A_OP(icode, &ptr, iMAC0, A_GPR(playback+0+SND_EMU10K1_PLAYBACK_CHANNELS), A_C_00000000, A_GPR(gpr), A_GPR(playback+0+SND_EMU10K1_PLAYBACK_CHANNELS));
- A_OP(icode, &ptr, iMAC0, A_GPR(playback+1+SND_EMU10K1_PLAYBACK_CHANNELS), A_C_00000000, A_GPR(gpr), A_GPR(playback+1+SND_EMU10K1_PLAYBACK_CHANNELS));
- A_OP(icode, &ptr, iMAC0, A_GPR(playback+2+SND_EMU10K1_PLAYBACK_CHANNELS), A_C_00000000, A_GPR(gpr), A_GPR(playback+2+SND_EMU10K1_PLAYBACK_CHANNELS));
- A_OP(icode, &ptr, iMAC0, A_GPR(playback+3+SND_EMU10K1_PLAYBACK_CHANNELS), A_C_00000000, A_GPR(gpr), A_GPR(playback+3+SND_EMU10K1_PLAYBACK_CHANNELS));
- A_OP(icode, &ptr, iMAC0, A_GPR(playback+4+SND_EMU10K1_PLAYBACK_CHANNELS), A_C_00000000, A_GPR(gpr), A_GPR(playback+4+SND_EMU10K1_PLAYBACK_CHANNELS));
- A_OP(icode, &ptr, iMAC0, A_GPR(playback+5+SND_EMU10K1_PLAYBACK_CHANNELS), A_C_00000000, A_GPR(gpr), A_GPR(playback+5+SND_EMU10K1_PLAYBACK_CHANNELS));
- A_OP(icode, &ptr, iMAC0, A_GPR(playback+6+SND_EMU10K1_PLAYBACK_CHANNELS), A_C_00000000, A_GPR(gpr), A_GPR(playback+6+SND_EMU10K1_PLAYBACK_CHANNELS));
- A_OP(icode, &ptr, iMAC0, A_GPR(playback+7+SND_EMU10K1_PLAYBACK_CHANNELS), A_C_00000000, A_GPR(gpr), A_GPR(playback+7+SND_EMU10K1_PLAYBACK_CHANNELS));
+ for (z = 0; z < 8; z++)
+ A_OP(icode, &ptr, iMAC0, A_GPR(playback+z+SND_EMU10K1_PLAYBACK_CHANNELS), A_C_00000000, A_GPR(gpr), A_GPR(playback+z+SND_EMU10K1_PLAYBACK_CHANNELS));
snd_emu10k1_init_mono_control(&controls[nctl++], "Wave Master Playback Volume", gpr, 0);
gpr += 2;
@@ -1651,102 +1645,14 @@ A_OP(icode, &ptr, iMAC0, A_GPR(var), A_GPR(var), A_GPR(vol), A_EXTIN(input))
dev_dbg(emu->card->dev, "emufx.c: gpr=0x%x, tmp=0x%x\n",
gpr, tmp);
*/
- /* For the EMU1010: How to get 32bit values from the DSP. High 16bits into L, low 16bits into R. */
- /* A_P16VIN(0) is delayed by one sample,
- * so all other A_P16VIN channels will need to also be delayed
- */
- /* Left ADC in. 1 of 2 */
snd_emu10k1_audigy_dsp_convert_32_to_2x16( icode, &ptr, tmp, bit_shifter16, A_P16VIN(0x0), A_FXBUS2(0) );
- /* Right ADC in 1 of 2 */
- gpr_map[gpr++] = 0x00000000;
- /* Delaying by one sample: instead of copying the input
- * value A_P16VIN to output A_FXBUS2 as in the first channel,
- * we use an auxiliary register, delaying the value by one
- * sample
- */
- snd_emu10k1_audigy_dsp_convert_32_to_2x16( icode, &ptr, tmp, bit_shifter16, A_GPR(gpr - 1), A_FXBUS2(2) );
- A_OP(icode, &ptr, iACC3, A_GPR(gpr - 1), A_P16VIN(0x1), A_C_00000000, A_C_00000000);
- gpr_map[gpr++] = 0x00000000;
- snd_emu10k1_audigy_dsp_convert_32_to_2x16( icode, &ptr, tmp, bit_shifter16, A_GPR(gpr - 1), A_FXBUS2(4) );
- A_OP(icode, &ptr, iACC3, A_GPR(gpr - 1), A_P16VIN(0x2), A_C_00000000, A_C_00000000);
- gpr_map[gpr++] = 0x00000000;
- snd_emu10k1_audigy_dsp_convert_32_to_2x16( icode, &ptr, tmp, bit_shifter16, A_GPR(gpr - 1), A_FXBUS2(6) );
- A_OP(icode, &ptr, iACC3, A_GPR(gpr - 1), A_P16VIN(0x3), A_C_00000000, A_C_00000000);
- /* For 96kHz mode */
- /* Left ADC in. 2 of 2 */
- gpr_map[gpr++] = 0x00000000;
- snd_emu10k1_audigy_dsp_convert_32_to_2x16( icode, &ptr, tmp, bit_shifter16, A_GPR(gpr - 1), A_FXBUS2(0x8) );
- A_OP(icode, &ptr, iACC3, A_GPR(gpr - 1), A_P16VIN(0x4), A_C_00000000, A_C_00000000);
- /* Right ADC in 2 of 2 */
- gpr_map[gpr++] = 0x00000000;
- snd_emu10k1_audigy_dsp_convert_32_to_2x16( icode, &ptr, tmp, bit_shifter16, A_GPR(gpr - 1), A_FXBUS2(0xa) );
- A_OP(icode, &ptr, iACC3, A_GPR(gpr - 1), A_P16VIN(0x5), A_C_00000000, A_C_00000000);
- gpr_map[gpr++] = 0x00000000;
- snd_emu10k1_audigy_dsp_convert_32_to_2x16( icode, &ptr, tmp, bit_shifter16, A_GPR(gpr - 1), A_FXBUS2(0xc) );
- A_OP(icode, &ptr, iACC3, A_GPR(gpr - 1), A_P16VIN(0x6), A_C_00000000, A_C_00000000);
- gpr_map[gpr++] = 0x00000000;
- snd_emu10k1_audigy_dsp_convert_32_to_2x16( icode, &ptr, tmp, bit_shifter16, A_GPR(gpr - 1), A_FXBUS2(0xe) );
- A_OP(icode, &ptr, iACC3, A_GPR(gpr - 1), A_P16VIN(0x7), A_C_00000000, A_C_00000000);
- /* Pavel Hofman - we still have voices, A_FXBUS2s, and
- * A_P16VINs available -
- * let's add 8 more capture channels - total of 16
- */
- gpr_map[gpr++] = 0x00000000;
- snd_emu10k1_audigy_dsp_convert_32_to_2x16(icode, &ptr, tmp,
- bit_shifter16,
- A_GPR(gpr - 1),
- A_FXBUS2(0x10));
- A_OP(icode, &ptr, iACC3, A_GPR(gpr - 1), A_P16VIN(0x8),
- A_C_00000000, A_C_00000000);
- gpr_map[gpr++] = 0x00000000;
- snd_emu10k1_audigy_dsp_convert_32_to_2x16(icode, &ptr, tmp,
- bit_shifter16,
- A_GPR(gpr - 1),
- A_FXBUS2(0x12));
- A_OP(icode, &ptr, iACC3, A_GPR(gpr - 1), A_P16VIN(0x9),
- A_C_00000000, A_C_00000000);
- gpr_map[gpr++] = 0x00000000;
- snd_emu10k1_audigy_dsp_convert_32_to_2x16(icode, &ptr, tmp,
- bit_shifter16,
- A_GPR(gpr - 1),
- A_FXBUS2(0x14));
- A_OP(icode, &ptr, iACC3, A_GPR(gpr - 1), A_P16VIN(0xa),
- A_C_00000000, A_C_00000000);
- gpr_map[gpr++] = 0x00000000;
- snd_emu10k1_audigy_dsp_convert_32_to_2x16(icode, &ptr, tmp,
- bit_shifter16,
- A_GPR(gpr - 1),
- A_FXBUS2(0x16));
- A_OP(icode, &ptr, iACC3, A_GPR(gpr - 1), A_P16VIN(0xb),
- A_C_00000000, A_C_00000000);
- gpr_map[gpr++] = 0x00000000;
- snd_emu10k1_audigy_dsp_convert_32_to_2x16(icode, &ptr, tmp,
- bit_shifter16,
- A_GPR(gpr - 1),
- A_FXBUS2(0x18));
- A_OP(icode, &ptr, iACC3, A_GPR(gpr - 1), A_P16VIN(0xc),
- A_C_00000000, A_C_00000000);
- gpr_map[gpr++] = 0x00000000;
- snd_emu10k1_audigy_dsp_convert_32_to_2x16(icode, &ptr, tmp,
- bit_shifter16,
- A_GPR(gpr - 1),
- A_FXBUS2(0x1a));
- A_OP(icode, &ptr, iACC3, A_GPR(gpr - 1), A_P16VIN(0xd),
- A_C_00000000, A_C_00000000);
- gpr_map[gpr++] = 0x00000000;
- snd_emu10k1_audigy_dsp_convert_32_to_2x16(icode, &ptr, tmp,
- bit_shifter16,
- A_GPR(gpr - 1),
- A_FXBUS2(0x1c));
- A_OP(icode, &ptr, iACC3, A_GPR(gpr - 1), A_P16VIN(0xe),
- A_C_00000000, A_C_00000000);
- gpr_map[gpr++] = 0x00000000;
- snd_emu10k1_audigy_dsp_convert_32_to_2x16(icode, &ptr, tmp,
- bit_shifter16,
- A_GPR(gpr - 1),
- A_FXBUS2(0x1e));
- A_OP(icode, &ptr, iACC3, A_GPR(gpr - 1), A_P16VIN(0xf),
- A_C_00000000, A_C_00000000);
+ /* A_P16VIN(0) is delayed by one sample, so all other A_P16VIN channels
+ * will need to also be delayed; we use an auxiliary register for that. */
+ for (z = 1; z < 0x10; z++) {
+ snd_emu10k1_audigy_dsp_convert_32_to_2x16( icode, &ptr, tmp, bit_shifter16, A_GPR(gpr), A_FXBUS2(z * 2) );
+ A_OP(icode, &ptr, iACC3, A_GPR(gpr), A_P16VIN(z), A_C_00000000, A_C_00000000);
+ gpr_map[gpr++] = 0x00000000;
+ }
}
#if 0
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index db8593d79431..adfab80b8189 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -10006,6 +10006,7 @@ static int patch_alc269(struct hda_codec *codec)
spec = codec->spec;
spec->gen.shared_mic_vref_pin = 0x18;
codec->power_save_node = 0;
+ spec->en_3kpull_low = true;
#ifdef CONFIG_PM
codec->patch_ops.suspend = alc269_suspend;
@@ -10088,14 +10089,16 @@ static int patch_alc269(struct hda_codec *codec)
spec->shutup = alc256_shutup;
spec->init_hook = alc256_init;
spec->gen.mixer_nid = 0; /* ALC256 does not have any loopback mixer path */
- if (codec->bus->pci->vendor == PCI_VENDOR_ID_AMD)
- spec->en_3kpull_low = true;
+ if (codec->core.vendor_id == 0x10ec0236 &&
+ codec->bus->pci->vendor != PCI_VENDOR_ID_AMD)
+ spec->en_3kpull_low = false;
break;
case 0x10ec0257:
spec->codec_variant = ALC269_TYPE_ALC257;
spec->shutup = alc256_shutup;
spec->init_hook = alc256_init;
spec->gen.mixer_nid = 0;
+ spec->en_3kpull_low = false;
break;
case 0x10ec0215:
case 0x10ec0245:
@@ -10719,6 +10722,7 @@ enum {
ALC897_FIXUP_HP_HSMIC_VERB,
ALC897_FIXUP_LENOVO_HEADSET_MODE,
ALC897_FIXUP_HEADSET_MIC_PIN2,
+ ALC897_FIXUP_UNIS_H3C_X500S,
};
static const struct hda_fixup alc662_fixups[] = {
@@ -11158,6 +11162,13 @@ static const struct hda_fixup alc662_fixups[] = {
.chained = true,
.chain_id = ALC897_FIXUP_LENOVO_HEADSET_MODE
},
+ [ALC897_FIXUP_UNIS_H3C_X500S] = {
+ .type = HDA_FIXUP_VERBS,
+ .v.verbs = (const struct hda_verb[]) {
+ { 0x14, AC_VERB_SET_EAPD_BTLENABLE, 0 },
+ {}
+ },
+ },
};
static const struct snd_pci_quirk alc662_fixup_tbl[] = {
@@ -11319,6 +11330,7 @@ static const struct hda_model_fixup alc662_fixup_models[] = {
{.id = ALC662_FIXUP_USI_HEADSET_MODE, .name = "usi-headset"},
{.id = ALC662_FIXUP_LENOVO_MULTI_CODECS, .name = "dual-codecs"},
{.id = ALC669_FIXUP_ACER_ASPIRE_ETHOS, .name = "aspire-ethos"},
+ {.id = ALC897_FIXUP_UNIS_H3C_X500S, .name = "unis-h3c-x500s"},
{}
};
diff --git a/sound/soc/codecs/rt5665.c b/sound/soc/codecs/rt5665.c
index 8a915cdce0fe..8b73c2d7f1f1 100644
--- a/sound/soc/codecs/rt5665.c
+++ b/sound/soc/codecs/rt5665.c
@@ -4472,6 +4472,8 @@ static void rt5665_remove(struct snd_soc_component *component)
struct rt5665_priv *rt5665 = snd_soc_component_get_drvdata(component);
regmap_write(rt5665->regmap, RT5665_RESET, 0);
+
+ regulator_bulk_disable(ARRAY_SIZE(rt5665->supplies), rt5665->supplies);
}
#ifdef CONFIG_PM
diff --git a/sound/soc/intel/boards/sof_sdw.c b/sound/soc/intel/boards/sof_sdw.c
index f5d8f7951cfc..cbbb50ddc795 100644
--- a/sound/soc/intel/boards/sof_sdw.c
+++ b/sound/soc/intel/boards/sof_sdw.c
@@ -199,6 +199,31 @@ static const struct dmi_system_id sof_sdw_quirk_table[] = {
SOF_RT715_DAI_ID_FIX |
SOF_SDW_PCH_DMIC),
},
+ {
+ .callback = sof_sdw_quirk_cb,
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Meteor Lake Client Platform"),
+ },
+ .driver_data = (void *)(RT711_JD2_100K),
+ },
+ {
+ .callback = sof_sdw_quirk_cb,
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Google"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Rex"),
+ },
+ .driver_data = (void *)(SOF_SDW_PCH_DMIC),
+ },
+ /* LunarLake devices */
+ {
+ .callback = sof_sdw_quirk_cb,
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Lunar Lake Client Platform"),
+ },
+ .driver_data = (void *)(RT711_JD2_100K),
+ },
{}
};
diff --git a/sound/soc/meson/axg-tdm-formatter.c b/sound/soc/meson/axg-tdm-formatter.c
index cab7fa2851aa..4834cfd163c0 100644
--- a/sound/soc/meson/axg-tdm-formatter.c
+++ b/sound/soc/meson/axg-tdm-formatter.c
@@ -30,27 +30,32 @@ int axg_tdm_formatter_set_channel_masks(struct regmap *map,
struct axg_tdm_stream *ts,
unsigned int offset)
{
- unsigned int val, ch = ts->channels;
- unsigned long mask;
- int i, j;
+ unsigned int ch = ts->channels;
+ u32 val[AXG_TDM_NUM_LANES];
+ int i, j, k;
+
+ /*
+ * We need to mimick the slot distribution used by the HW to keep the
+ * channel placement consistent regardless of the number of channel
+ * in the stream. This is why the odd algorithm below is used.
+ */
+ memset(val, 0, sizeof(*val) * AXG_TDM_NUM_LANES);
/*
* Distribute the channels of the stream over the available slots
- * of each TDM lane
+ * of each TDM lane. We need to go over the 32 slots ...
*/
- for (i = 0; i < AXG_TDM_NUM_LANES; i++) {
- val = 0;
- mask = ts->mask[i];
-
- for (j = find_first_bit(&mask, 32);
- (j < 32) && ch;
- j = find_next_bit(&mask, 32, j + 1)) {
- val |= 1 << j;
- ch -= 1;
+ for (i = 0; (i < 32) && ch; i += 2) {
+ /* ... of all the lanes ... */
+ for (j = 0; j < AXG_TDM_NUM_LANES; j++) {
+ /* ... then distribute the channels in pairs */
+ for (k = 0; k < 2; k++) {
+ if ((BIT(i + k) & ts->mask[j]) && ch) {
+ val[j] |= BIT(i + k);
+ ch -= 1;
+ }
+ }
}
-
- regmap_write(map, offset, val);
- offset += regmap_get_reg_stride(map);
}
/*
@@ -63,6 +68,11 @@ int axg_tdm_formatter_set_channel_masks(struct regmap *map,
return -EINVAL;
}
+ for (i = 0; i < AXG_TDM_NUM_LANES; i++) {
+ regmap_write(map, offset, val[i]);
+ offset += regmap_get_reg_stride(map);
+ }
+
return 0;
}
EXPORT_SYMBOL_GPL(axg_tdm_formatter_set_channel_masks);
diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h
index ec74aead0844..97fe2fadcafb 100644
--- a/sound/usb/quirks-table.h
+++ b/sound/usb/quirks-table.h
@@ -3797,6 +3797,35 @@ AU0828_DEVICE(0x2040, 0x7270, "Hauppauge", "HVR-950Q"),
}
}
},
+{
+ /* Advanced modes of the Mythware XA001AU.
+ * For the standard mode, Mythware XA001AU has ID ffad:a001
+ */
+ USB_DEVICE_VENDOR_SPEC(0xffad, 0xa001),
+ .driver_info = (unsigned long) &(const struct snd_usb_audio_quirk) {
+ .vendor_name = "Mythware",
+ .product_name = "XA001AU",
+ .ifnum = QUIRK_ANY_INTERFACE,
+ .type = QUIRK_COMPOSITE,
+ .data = (const struct snd_usb_audio_quirk[]) {
+ {
+ .ifnum = 0,
+ .type = QUIRK_IGNORE_INTERFACE,
+ },
+ {
+ .ifnum = 1,
+ .type = QUIRK_AUDIO_STANDARD_INTERFACE,
+ },
+ {
+ .ifnum = 2,
+ .type = QUIRK_AUDIO_STANDARD_INTERFACE,
+ },
+ {
+ .ifnum = -1
+ }
+ }
+ }
+},
#undef USB_DEVICE_VENDOR_SPEC
#undef USB_AUDIO_DEVICE
diff --git a/tools/include/linux/objtool.h b/tools/include/linux/objtool.h
index 662f19374bd9..d17fa7f4001d 100644
--- a/tools/include/linux/objtool.h
+++ b/tools/include/linux/objtool.h
@@ -71,6 +71,23 @@ struct unwind_hint {
static void __used __section(".discard.func_stack_frame_non_standard") \
*__func_stack_frame_non_standard_##func = func
+/*
+ * STACK_FRAME_NON_STANDARD_FP() is a frame-pointer-specific function ignore
+ * for the case where a function is intentionally missing frame pointer setup,
+ * but otherwise needs objtool/ORC coverage when frame pointers are disabled.
+ */
+#ifdef CONFIG_FRAME_POINTER
+#define STACK_FRAME_NON_STANDARD_FP(func) STACK_FRAME_NON_STANDARD(func)
+#else
+#define STACK_FRAME_NON_STANDARD_FP(func)
+#endif
+
+#define ANNOTATE_NOENDBR \
+ "986: \n\t" \
+ ".pushsection .discard.noendbr\n\t" \
+ _ASM_PTR " 986b\n\t" \
+ ".popsection\n\t"
+
#else /* __ASSEMBLY__ */
/*
@@ -117,6 +134,13 @@ struct unwind_hint {
.popsection
.endm
+.macro ANNOTATE_NOENDBR
+.Lhere_\@:
+ .pushsection .discard.noendbr
+ .quad .Lhere_\@
+ .popsection
+.endm
+
#endif /* __ASSEMBLY__ */
#else /* !CONFIG_STACK_VALIDATION */
@@ -126,10 +150,14 @@ struct unwind_hint {
#define UNWIND_HINT(sp_reg, sp_offset, type, end) \
"\n\t"
#define STACK_FRAME_NON_STANDARD(func)
+#define STACK_FRAME_NON_STANDARD_FP(func)
+#define ANNOTATE_NOENDBR
#else
#define ANNOTATE_INTRA_FUNCTION_CALL
.macro UNWIND_HINT type:req sp_reg=0 sp_offset=0 end=0
.endm
+.macro ANNOTATE_NOENDBR
+.endm
#endif
#endif /* CONFIG_STACK_VALIDATION */
diff --git a/tools/objtool/arch/x86/decode.c b/tools/objtool/arch/x86/decode.c
index 5b915ebb6116..b6791e8d9ab3 100644
--- a/tools/objtool/arch/x86/decode.c
+++ b/tools/objtool/arch/x86/decode.c
@@ -655,5 +655,5 @@ bool arch_is_rethunk(struct symbol *sym)
return !strcmp(sym->name, "__x86_return_thunk") ||
!strcmp(sym->name, "srso_untrain_ret") ||
!strcmp(sym->name, "srso_safe_ret") ||
- !strcmp(sym->name, "__ret");
+ !strcmp(sym->name, "retbleed_return_thunk");
}
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 9a0a54194636..965c055aa808 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -369,7 +369,7 @@ static int decode_instructions(struct objtool_file *file)
if (!strcmp(sec->name, ".noinstr.text") ||
!strcmp(sec->name, ".entry.text") ||
- !strncmp(sec->name, ".text.__x86.", 12))
+ !strncmp(sec->name, ".text..__x86.", 13))
sec->noinstr = true;
for (offset = 0; offset < sec->len; offset += insn->len) {
@@ -1165,7 +1165,7 @@ static int add_jump_destinations(struct objtool_file *file)
continue;
/*
- * This is a special case for zen_untrain_ret().
+ * This is a special case for retbleed_untrain_ret().
* It jumps to __x86_return_thunk(), but objtool
* can't find the thunk's starting RET
* instruction, because the RET is also in the
@@ -2079,12 +2079,17 @@ static int decode_sections(struct objtool_file *file)
return 0;
}
-static bool is_fentry_call(struct instruction *insn)
+static bool is_special_call(struct instruction *insn)
{
- if (insn->type == INSN_CALL &&
- insn->call_dest &&
- insn->call_dest->fentry)
- return true;
+ if (insn->type == INSN_CALL) {
+ struct symbol *dest = insn->call_dest;
+
+ if (!dest)
+ return false;
+
+ if (dest->fentry)
+ return true;
+ }
return false;
}
@@ -2958,7 +2963,7 @@ static int validate_branch(struct objtool_file *file, struct symbol *func,
if (ret)
return ret;
- if (!no_fp && func && !is_fentry_call(insn) &&
+ if (!no_fp && func && !is_special_call(insn) &&
!has_valid_stack_frame(&state)) {
WARN_FUNC("call without frame pointer save/setup",
sec, insn->offset);
diff --git a/tools/testing/selftests/net/forwarding/mirror_gre_changes.sh b/tools/testing/selftests/net/forwarding/mirror_gre_changes.sh
index 472bd023e2a5..b501b366367f 100755
--- a/tools/testing/selftests/net/forwarding/mirror_gre_changes.sh
+++ b/tools/testing/selftests/net/forwarding/mirror_gre_changes.sh
@@ -72,7 +72,8 @@ test_span_gre_ttl()
RET=0
- mirror_install $swp1 ingress $tundev "matchall $tcflags"
+ mirror_install $swp1 ingress $tundev \
+ "prot ip flower $tcflags ip_prot icmp"
tc filter add dev $h3 ingress pref 77 prot $prot \
flower ip_ttl 50 action pass
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