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Message-ID: <alpine.DEB.2.11.1601111854020.3575@nanos>
Date: Mon, 11 Jan 2016 18:57:56 +0100 (CET)
From: Thomas Gleixner <tglx@...utronix.de>
To: Linus Torvalds <torvalds@...ux-foundation.org>
cc: LKML <linux-kernel@...r.kernel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Ingo Molnar <mingo@...nel.org>,
"H. Peter Anvin" <hpa@...or.com>
Subject: [GIT pull] irq updates for 4.5
Linus,
please pull the latest irq-core-for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq-core-for-linus
The irq department provides:
- Support for MSI to wire bridges and a first user of it
- More ACPI support for ARM/GIC
- A new TS-4800 interrupt controller driver
- RCU based free of interrupt descriptors to support the upcoming Intel
VMD technology without introducing a locking nightmare
- The usual pile of fixes and updates to drivers and core code
Thanks,
tglx
------------------>
Andrea Merello (3):
irqchip/bcm2836: Add SMP support for the 2836
irqchip/bcm2836: Tolerate IRQs while no flag is set in ISR
irqchip/bcm2836: Make code more readable
Chen-Yu Tsai (3):
irqchip/sunxi-nmi: Rename binding doc filename to allwinner,sunxi-nmi.txt
irqchip/sunxi-nmi: Add sun9i-a80 variant to binding doc
irqchip/sunxi-nmi: Support sun9i A80 NMI controller
Damien Riegel (2):
irqchip/ts4800: Add documentation for TS-4800 interrupt controller
irqchip/ts4800: Add TS-4800 interrupt controller
Eric Anholt (1):
irqchip/bcm2836: Fix initialization of the LOCAL_IRQ_CNT timers
Geert Uytterhoeven (3):
irqchip/renesas-intc-irqpin: Remove obsolete platform data support
irqchip/renesas-intc-irqpin: Remove intc_irqpin_priv.number_of_irqs
irqchip/renesas-intc-irqpin: Improve clock error handling and reporting
Geliang Tang (1):
irqchip/zevio: Use irq_data_get_chip_type() helper
Jake Oshins (1):
genirq/msi: Export functions to allow MSI domains in modules
Linus Walleij (4):
irqchip/gic: Fix ARM11MPCore GIC bindings
irqchip/gic: Support RealView variant setup
irqchip/gic: Assign irqchip dynamically
irqchip/gic: Kconfig the number of instances
Ma Jun (4):
dt-bindings: Documents the mbigen bindings
irqchip/mgigen: Add platform device driver for mbigen device
irqchip/mbigen: Create irq domain for each mbigen device
irqchip/mbigen: Implement the mbigen irq chip operation functions
MaJun (1):
irq/platform-MSI: Increase the maximum MSIs the MSI framework can support
Marc Zyngier (8):
platform-msi: Allow MSIs to be allocated in chunks
platform-msi: Factor out allocation/free of private data
irqdomain: Make irq_domain_alloc_irqs_recursive available
genirq/msi: Make the .prepare callback reusable
genirq/msi: Add msi_domain_populate_irqs
platform-msi: Allow creation of a MSI-based stacked irq domain
irqchip/gic-v2m: Fix of_node refcount on error
irqchip/gic: Make interrupt ID 1020 invalid
Milo Kim (1):
irqchip/omap-intc: Remove duplicate setup for IRQ chip type handler
Sekhar Nori (1):
irqchip/omap-intc: Add support for spurious irq handling
Sudeep Holla (1):
genirq: Delay incrementing interrupt count if it's disabled/pending
Suravee Suthikulpanit (5):
acpi: pci: Setup MSI domain for ACPI based pci devices
irqdomain: Introduce is_fwnode_irqchip helper
irqchip/gic-v2m: Refactor to prepare for ACPI support
irqchip/gic-v2m: acpi: Introducing GICv2m ACPI support
irqchip/gicv2m: Miscellaneous fixes for v2m resources and SPI ranges
Thomas Gleixner (1):
genirq: Free irq_desc with rcu
Thomas Petazzoni (1):
genirq: Implement irq_percpu_is_enabled()
...r,sun67i-sc-nmi.txt => allwinner,sunxi-nmi.txt} | 2 +-
.../bindings/interrupt-controller/arm,gic.txt | 1 +
.../interrupt-controller/hisilicon,mbigen-v2.txt | 74 +++++
.../interrupt-controller/technologic,ts4800.txt | 16 ++
drivers/base/platform-msi.c | 256 ++++++++++++++----
drivers/irqchip/Kconfig | 19 ++
drivers/irqchip/Makefile | 3 +
drivers/irqchip/irq-bcm2836.c | 55 +++-
drivers/irqchip/irq-gic-realview.c | 43 +++
drivers/irqchip/irq-gic-v2m.c | 165 ++++++++++--
drivers/irqchip/irq-gic.c | 64 +++--
drivers/irqchip/irq-mbigen.c | 297 +++++++++++++++++++++
drivers/irqchip/irq-omap-intc.c | 28 +-
drivers/irqchip/irq-renesas-intc-irqpin.c | 96 +++----
drivers/irqchip/irq-sunxi-nmi.c | 13 +
drivers/irqchip/irq-ts4800.c | 163 +++++++++++
drivers/irqchip/irq-zevio.c | 3 +-
drivers/pci/msi.c | 4 +
drivers/pci/pci-acpi.c | 42 +++
drivers/pci/probe.c | 2 +
include/linux/interrupt.h | 1 +
include/linux/irqchip/arm-gic.h | 13 +-
include/linux/irqdesc.h | 6 +
include/linux/irqdomain.h | 13 +
include/linux/msi.h | 18 ++
include/linux/pci.h | 10 +
.../linux/platform_data/irq-renesas-intc-irqpin.h | 29 --
kernel/irq/chip.c | 9 +-
kernel/irq/irqdesc.c | 19 +-
kernel/irq/irqdomain.c | 12 +-
kernel/irq/manage.c | 25 ++
kernel/irq/msi.c | 58 +++-
32 files changed, 1350 insertions(+), 209 deletions(-)
rename Documentation/devicetree/bindings/interrupt-controller/{allwinner,sun67i-sc-nmi.txt => allwinner,sunxi-nmi.txt} (94%)
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/hisilicon,mbigen-v2.txt
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/technologic,ts4800.txt
create mode 100644 drivers/irqchip/irq-gic-realview.c
create mode 100644 drivers/irqchip/irq-mbigen.c
create mode 100644 drivers/irqchip/irq-ts4800.c
delete mode 100644 include/linux/platform_data/irq-renesas-intc-irqpin.h
diff --git a/Documentation/devicetree/bindings/interrupt-controller/allwinner,sun67i-sc-nmi.txt b/Documentation/devicetree/bindings/interrupt-controller/allwinner,sunxi-nmi.txt
similarity index 94%
rename from Documentation/devicetree/bindings/interrupt-controller/allwinner,sun67i-sc-nmi.txt
rename to Documentation/devicetree/bindings/interrupt-controller/allwinner,sunxi-nmi.txt
index d1c5cdabc3e0..81cd3692405e 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/allwinner,sun67i-sc-nmi.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/allwinner,sunxi-nmi.txt
@@ -4,7 +4,7 @@ Allwinner Sunxi NMI Controller
Required properties:
- compatible : should be "allwinner,sun7i-a20-sc-nmi" or
- "allwinner,sun6i-a31-sc-nmi"
+ "allwinner,sun6i-a31-sc-nmi" or "allwinner,sun9i-a80-nmi"
- reg : Specifies base physical address and size of the registers.
- interrupt-controller : Identifies the node as an interrupt controller
- #interrupt-cells : Specifies the number of cells needed to encode an
diff --git a/Documentation/devicetree/bindings/interrupt-controller/arm,gic.txt b/Documentation/devicetree/bindings/interrupt-controller/arm,gic.txt
index cc56021eb60b..5a1cb4bc3dfe 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/arm,gic.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/arm,gic.txt
@@ -18,6 +18,7 @@ Main node required properties:
"arm,cortex-a9-gic"
"arm,gic-400"
"arm,pl390"
+ "arm,tc11mp-gic"
"brcm,brahma-b15-gic"
"qcom,msm-8660-qgic"
"qcom,msm-qgic2"
diff --git a/Documentation/devicetree/bindings/interrupt-controller/hisilicon,mbigen-v2.txt b/Documentation/devicetree/bindings/interrupt-controller/hisilicon,mbigen-v2.txt
new file mode 100644
index 000000000000..720f7c92e9a1
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/hisilicon,mbigen-v2.txt
@@ -0,0 +1,74 @@
+Hisilicon mbigen device tree bindings.
+=======================================
+
+Mbigen means: message based interrupt generator.
+
+MBI is kind of msi interrupt only used on Non-PCI devices.
+
+To reduce the wired interrupt number connected to GIC,
+Hisilicon designed mbigen to collect and generate interrupt.
+
+
+Non-pci devices can connect to mbigen and generate the
+interrupt by writing ITS register.
+
+The mbigen chip and devices connect to mbigen have the following properties:
+
+Mbigen main node required properties:
+-------------------------------------------
+- compatible: Should be "hisilicon,mbigen-v2"
+
+- reg: Specifies the base physical address and size of the Mbigen
+ registers.
+
+- interrupt controller: Identifies the node as an interrupt controller
+
+- msi-parent: Specifies the MSI controller this mbigen use.
+ For more detail information,please refer to the generic msi-parent binding in
+ Documentation/devicetree/bindings/interrupt-controller/msi.txt.
+
+- num-pins: the total number of pins implemented in this Mbigen
+ instance.
+
+- #interrupt-cells : Specifies the number of cells needed to encode an
+ interrupt source. The value must be 2.
+
+ The 1st cell is hardware pin number of the interrupt.This number is local to
+ each mbigen chip and in the range from 0 to the maximum interrupts number
+ of the mbigen.
+
+ The 2nd cell is the interrupt trigger type.
+ The value of this cell should be:
+ 1: rising edge triggered
+ or
+ 4: high level triggered
+
+Examples:
+
+ mbigen_device_gmac:intc {
+ compatible = "hisilicon,mbigen-v2";
+ reg = <0x0 0xc0080000 0x0 0x10000>;
+ interrupt-controller;
+ msi-parent = <&its_dsa 0x40b1c>;
+ num-pins = <9>;
+ #interrupt-cells = <2>;
+ };
+
+Devices connect to mbigen required properties:
+----------------------------------------------------
+-interrupt-parent: Specifies the mbigen device node which device connected.
+
+-interrupts:Specifies the interrupt source.
+ For the specific information of each cell in this property,please refer to
+ the "interrupt-cells" description mentioned above.
+
+Examples:
+ gmac0: ethernet@...80000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0 0xc2080000 0 0x20000>,
+ <0 0xc0000000 0 0x1000>;
+ interrupt-parent = <&mbigen_device_gmac>;
+ interrupts = <656 1>,
+ <657 1>;
+ };
diff --git a/Documentation/devicetree/bindings/interrupt-controller/technologic,ts4800.txt b/Documentation/devicetree/bindings/interrupt-controller/technologic,ts4800.txt
new file mode 100644
index 000000000000..7f15f1b0325b
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/technologic,ts4800.txt
@@ -0,0 +1,16 @@
+TS-4800 FPGA interrupt controller
+
+TS-4800 FPGA has an internal interrupt controller. When one of the
+interrupts is triggered, the SoC is notified, usually using a GPIO as
+parent interrupt source.
+
+Required properties:
+- compatible: should be "technologic,ts4800-irqc"
+- interrupt-controller: identifies the node as an interrupt controller
+- reg: physical base address of the controller and length of memory mapped
+ region
+- #interrupt-cells: specifies the number of cells needed to encode an interrupt
+ source, should be 1.
+- interrupt-parent: phandle to the parent interrupt controller this one is
+ cascaded from
+- interrupts: specifies the interrupt line in the interrupt-parent controller
diff --git a/drivers/base/platform-msi.c b/drivers/base/platform-msi.c
index 5df4575b5ba7..47c43386786b 100644
--- a/drivers/base/platform-msi.c
+++ b/drivers/base/platform-msi.c
@@ -24,13 +24,17 @@
#include <linux/msi.h>
#include <linux/slab.h>
-#define DEV_ID_SHIFT 24
+#define DEV_ID_SHIFT 21
+#define MAX_DEV_MSIS (1 << (32 - DEV_ID_SHIFT))
/*
* Internal data structure containing a (made up, but unique) devid
* and the callback to write the MSI message.
*/
struct platform_msi_priv_data {
+ struct device *dev;
+ void *host_data;
+ msi_alloc_info_t arg;
irq_write_msi_msg_t write_msg;
int devid;
};
@@ -110,39 +114,49 @@ static void platform_msi_update_chip_ops(struct msi_domain_info *info)
chip->irq_write_msi_msg = platform_msi_write_msg;
}
-static void platform_msi_free_descs(struct device *dev)
+static void platform_msi_free_descs(struct device *dev, int base, int nvec)
{
struct msi_desc *desc, *tmp;
list_for_each_entry_safe(desc, tmp, dev_to_msi_list(dev), list) {
- list_del(&desc->list);
- free_msi_entry(desc);
+ if (desc->platform.msi_index >= base &&
+ desc->platform.msi_index < (base + nvec)) {
+ list_del(&desc->list);
+ free_msi_entry(desc);
+ }
}
}
-static int platform_msi_alloc_descs(struct device *dev, int nvec,
- struct platform_msi_priv_data *data)
+static int platform_msi_alloc_descs_with_irq(struct device *dev, int virq,
+ int nvec,
+ struct platform_msi_priv_data *data)
{
- int i;
+ struct msi_desc *desc;
+ int i, base = 0;
- for (i = 0; i < nvec; i++) {
- struct msi_desc *desc;
+ if (!list_empty(dev_to_msi_list(dev))) {
+ desc = list_last_entry(dev_to_msi_list(dev),
+ struct msi_desc, list);
+ base = desc->platform.msi_index + 1;
+ }
+ for (i = 0; i < nvec; i++) {
desc = alloc_msi_entry(dev);
if (!desc)
break;
desc->platform.msi_priv_data = data;
- desc->platform.msi_index = i;
+ desc->platform.msi_index = base + i;
desc->nvec_used = 1;
+ desc->irq = virq ? virq + i : 0;
list_add_tail(&desc->list, dev_to_msi_list(dev));
}
if (i != nvec) {
/* Clean up the mess */
- platform_msi_free_descs(dev);
+ platform_msi_free_descs(dev, base, nvec);
return -ENOMEM;
}
@@ -150,6 +164,13 @@ static int platform_msi_alloc_descs(struct device *dev, int nvec,
return 0;
}
+static int platform_msi_alloc_descs(struct device *dev, int nvec,
+ struct platform_msi_priv_data *data)
+
+{
+ return platform_msi_alloc_descs_with_irq(dev, 0, nvec, data);
+}
+
/**
* platform_msi_create_irq_domain - Create a platform MSI interrupt domain
* @fwnode: Optional fwnode of the interrupt controller
@@ -180,56 +201,75 @@ struct irq_domain *platform_msi_create_irq_domain(struct fwnode_handle *fwnode,
return domain;
}
-/**
- * platform_msi_domain_alloc_irqs - Allocate MSI interrupts for @dev
- * @dev: The device for which to allocate interrupts
- * @nvec: The number of interrupts to allocate
- * @write_msi_msg: Callback to write an interrupt message for @dev
- *
- * Returns:
- * Zero for success, or an error code in case of failure
- */
-int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec,
- irq_write_msi_msg_t write_msi_msg)
+static struct platform_msi_priv_data *
+platform_msi_alloc_priv_data(struct device *dev, unsigned int nvec,
+ irq_write_msi_msg_t write_msi_msg)
{
- struct platform_msi_priv_data *priv_data;
- int err;
-
+ struct platform_msi_priv_data *datap;
/*
* Limit the number of interrupts to 256 per device. Should we
* need to bump this up, DEV_ID_SHIFT should be adjusted
* accordingly (which would impact the max number of MSI
* capable devices).
*/
- if (!dev->msi_domain || !write_msi_msg || !nvec ||
- nvec > (1 << (32 - DEV_ID_SHIFT)))
- return -EINVAL;
+ if (!dev->msi_domain || !write_msi_msg || !nvec || nvec > MAX_DEV_MSIS)
+ return ERR_PTR(-EINVAL);
if (dev->msi_domain->bus_token != DOMAIN_BUS_PLATFORM_MSI) {
dev_err(dev, "Incompatible msi_domain, giving up\n");
- return -EINVAL;
+ return ERR_PTR(-EINVAL);
}
/* Already had a helping of MSI? Greed... */
if (!list_empty(dev_to_msi_list(dev)))
- return -EBUSY;
+ return ERR_PTR(-EBUSY);
+
+ datap = kzalloc(sizeof(*datap), GFP_KERNEL);
+ if (!datap)
+ return ERR_PTR(-ENOMEM);
+
+ datap->devid = ida_simple_get(&platform_msi_devid_ida,
+ 0, 1 << DEV_ID_SHIFT, GFP_KERNEL);
+ if (datap->devid < 0) {
+ int err = datap->devid;
+ kfree(datap);
+ return ERR_PTR(err);
+ }
- priv_data = kzalloc(sizeof(*priv_data), GFP_KERNEL);
- if (!priv_data)
- return -ENOMEM;
+ datap->write_msg = write_msi_msg;
+ datap->dev = dev;
- priv_data->devid = ida_simple_get(&platform_msi_devid_ida,
- 0, 1 << DEV_ID_SHIFT, GFP_KERNEL);
- if (priv_data->devid < 0) {
- err = priv_data->devid;
- goto out_free_data;
- }
+ return datap;
+}
+
+static void platform_msi_free_priv_data(struct platform_msi_priv_data *data)
+{
+ ida_simple_remove(&platform_msi_devid_ida, data->devid);
+ kfree(data);
+}
+
+/**
+ * platform_msi_domain_alloc_irqs - Allocate MSI interrupts for @dev
+ * @dev: The device for which to allocate interrupts
+ * @nvec: The number of interrupts to allocate
+ * @write_msi_msg: Callback to write an interrupt message for @dev
+ *
+ * Returns:
+ * Zero for success, or an error code in case of failure
+ */
+int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec,
+ irq_write_msi_msg_t write_msi_msg)
+{
+ struct platform_msi_priv_data *priv_data;
+ int err;
- priv_data->write_msg = write_msi_msg;
+ priv_data = platform_msi_alloc_priv_data(dev, nvec, write_msi_msg);
+ if (IS_ERR(priv_data))
+ return PTR_ERR(priv_data);
err = platform_msi_alloc_descs(dev, nvec, priv_data);
if (err)
- goto out_free_id;
+ goto out_free_priv_data;
err = msi_domain_alloc_irqs(dev->msi_domain, dev, nvec);
if (err)
@@ -238,11 +278,9 @@ int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec,
return 0;
out_free_desc:
- platform_msi_free_descs(dev);
-out_free_id:
- ida_simple_remove(&platform_msi_devid_ida, priv_data->devid);
-out_free_data:
- kfree(priv_data);
+ platform_msi_free_descs(dev, 0, nvec);
+out_free_priv_data:
+ platform_msi_free_priv_data(priv_data);
return err;
}
@@ -253,18 +291,126 @@ out_free_data:
*/
void platform_msi_domain_free_irqs(struct device *dev)
{
- struct msi_desc *desc;
+ if (!list_empty(dev_to_msi_list(dev))) {
+ struct msi_desc *desc;
+
+ desc = first_msi_entry(dev);
+ platform_msi_free_priv_data(desc->platform.msi_priv_data);
+ }
+
+ msi_domain_free_irqs(dev->msi_domain, dev);
+ platform_msi_free_descs(dev, 0, MAX_DEV_MSIS);
+}
+
+/**
+ * platform_msi_get_host_data - Query the private data associated with
+ * a platform-msi domain
+ * @domain: The platform-msi domain
+ *
+ * Returns the private data provided when calling
+ * platform_msi_create_device_domain.
+ */
+void *platform_msi_get_host_data(struct irq_domain *domain)
+{
+ struct platform_msi_priv_data *data = domain->host_data;
+ return data->host_data;
+}
+
+/**
+ * platform_msi_create_device_domain - Create a platform-msi domain
+ *
+ * @dev: The device generating the MSIs
+ * @nvec: The number of MSIs that need to be allocated
+ * @write_msi_msg: Callback to write an interrupt message for @dev
+ * @ops: The hierarchy domain operations to use
+ * @host_data: Private data associated to this domain
+ *
+ * Returns an irqdomain for @nvec interrupts
+ */
+struct irq_domain *
+platform_msi_create_device_domain(struct device *dev,
+ unsigned int nvec,
+ irq_write_msi_msg_t write_msi_msg,
+ const struct irq_domain_ops *ops,
+ void *host_data)
+{
+ struct platform_msi_priv_data *data;
+ struct irq_domain *domain;
+ int err;
+
+ data = platform_msi_alloc_priv_data(dev, nvec, write_msi_msg);
+ if (IS_ERR(data))
+ return NULL;
+
+ data->host_data = host_data;
+ domain = irq_domain_create_hierarchy(dev->msi_domain, 0, nvec,
+ of_node_to_fwnode(dev->of_node),
+ ops, data);
+ if (!domain)
+ goto free_priv;
- desc = first_msi_entry(dev);
- if (desc) {
- struct platform_msi_priv_data *data;
+ err = msi_domain_prepare_irqs(domain->parent, dev, nvec, &data->arg);
+ if (err)
+ goto free_domain;
+
+ return domain;
- data = desc->platform.msi_priv_data;
+free_domain:
+ irq_domain_remove(domain);
+free_priv:
+ platform_msi_free_priv_data(data);
+ return NULL;
+}
+
+/**
+ * platform_msi_domain_free - Free interrupts associated with a platform-msi
+ * domain
+ *
+ * @domain: The platform-msi domain
+ * @virq: The base irq from which to perform the free operation
+ * @nvec: How many interrupts to free from @virq
+ */
+void platform_msi_domain_free(struct irq_domain *domain, unsigned int virq,
+ unsigned int nvec)
+{
+ struct platform_msi_priv_data *data = domain->host_data;
+ struct msi_desc *desc;
+ for_each_msi_entry(desc, data->dev) {
+ if (WARN_ON(!desc->irq || desc->nvec_used != 1))
+ return;
+ if (!(desc->irq >= virq && desc->irq < (virq + nvec)))
+ continue;
- ida_simple_remove(&platform_msi_devid_ida, data->devid);
- kfree(data);
+ irq_domain_free_irqs_common(domain, desc->irq, 1);
}
+}
- msi_domain_free_irqs(dev->msi_domain, dev);
- platform_msi_free_descs(dev);
+/**
+ * platform_msi_domain_alloc - Allocate interrupts associated with
+ * a platform-msi domain
+ *
+ * @domain: The platform-msi domain
+ * @virq: The base irq from which to perform the allocate operation
+ * @nvec: How many interrupts to free from @virq
+ *
+ * Return 0 on success, or an error code on failure. Must be called
+ * with irq_domain_mutex held (which can only be done as part of a
+ * top-level interrupt allocation).
+ */
+int platform_msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
+ unsigned int nr_irqs)
+{
+ struct platform_msi_priv_data *data = domain->host_data;
+ int err;
+
+ err = platform_msi_alloc_descs_with_irq(data->dev, virq, nr_irqs, data);
+ if (err)
+ return err;
+
+ err = msi_domain_populate_irqs(domain->parent, data->dev,
+ virq, nr_irqs, &data->arg);
+ if (err)
+ platform_msi_domain_free(domain, virq, nr_irqs);
+
+ return err;
}
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 4d7294e5d982..11fc2a27fa2e 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -8,6 +8,11 @@ config ARM_GIC
select IRQ_DOMAIN_HIERARCHY
select MULTI_IRQ_HANDLER
+config ARM_GIC_MAX_NR
+ int
+ default 2 if ARCH_REALVIEW
+ default 1
+
config ARM_GIC_V2M
bool
depends on ARM_GIC
@@ -27,6 +32,14 @@ config ARM_GIC_V3_ITS
bool
select PCI_MSI_IRQ_DOMAIN
+config HISILICON_IRQ_MBIGEN
+ bool "Support mbigen interrupt controller"
+ default n
+ depends on ARM_GIC_V3 && ARM_GIC_V3_ITS && GENERIC_MSI_IRQ_DOMAIN
+ help
+ Enable the mbigen interrupt controller used on
+ Hisilicon platform.
+
config ARM_NVIC
bool
select IRQ_DOMAIN
@@ -138,6 +151,12 @@ config TB10X_IRQC
select IRQ_DOMAIN
select GENERIC_IRQ_CHIP
+config TS4800_IRQ
+ tristate "TS-4800 IRQ controller"
+ select IRQ_DOMAIN
+ help
+ Support for the TS-4800 FPGA IRQ controller
+
config VERSATILE_FPGA_IRQ
bool
select IRQ_DOMAIN
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index 177f78f6e6d6..d4c2e4ebc308 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -21,9 +21,11 @@ obj-$(CONFIG_ARCH_SUNXI) += irq-sun4i.o
obj-$(CONFIG_ARCH_SUNXI) += irq-sunxi-nmi.o
obj-$(CONFIG_ARCH_SPEAR3XX) += spear-shirq.o
obj-$(CONFIG_ARM_GIC) += irq-gic.o irq-gic-common.o
+obj-$(CONFIG_REALVIEW_DT) += irq-gic-realview.o
obj-$(CONFIG_ARM_GIC_V2M) += irq-gic-v2m.o
obj-$(CONFIG_ARM_GIC_V3) += irq-gic-v3.o irq-gic-common.o
obj-$(CONFIG_ARM_GIC_V3_ITS) += irq-gic-v3-its.o irq-gic-v3-its-pci-msi.o irq-gic-v3-its-platform-msi.o
+obj-$(CONFIG_HISILICON_IRQ_MBIGEN) += irq-mbigen.o
obj-$(CONFIG_ARM_NVIC) += irq-nvic.o
obj-$(CONFIG_ARM_VIC) += irq-vic.o
obj-$(CONFIG_ATMEL_AIC_IRQ) += irq-atmel-aic-common.o irq-atmel-aic.o
@@ -39,6 +41,7 @@ obj-$(CONFIG_ARCH_NSPIRE) += irq-zevio.o
obj-$(CONFIG_ARCH_VT8500) += irq-vt8500.o
obj-$(CONFIG_ST_IRQCHIP) += irq-st.o
obj-$(CONFIG_TB10X_IRQC) += irq-tb10x.o
+obj-$(CONFIG_TS4800_IRQ) += irq-ts4800.o
obj-$(CONFIG_XTENSA) += irq-xtensa-pic.o
obj-$(CONFIG_XTENSA_MX) += irq-xtensa-mx.o
obj-$(CONFIG_IRQ_CROSSBAR) += irq-crossbar.o
diff --git a/drivers/irqchip/irq-bcm2836.c b/drivers/irqchip/irq-bcm2836.c
index f68708281fcf..963065a0d774 100644
--- a/drivers/irqchip/irq-bcm2836.c
+++ b/drivers/irqchip/irq-bcm2836.c
@@ -21,6 +21,9 @@
#include <linux/irqdomain.h>
#include <asm/exception.h>
+#define LOCAL_CONTROL 0x000
+#define LOCAL_PRESCALER 0x008
+
/*
* The low 2 bits identify the CPU that the GPU IRQ goes to, and the
* next 2 bits identify the CPU that the GPU FIQ goes to.
@@ -50,14 +53,16 @@
/* Same status bits as above, but for FIQ. */
#define LOCAL_FIQ_PENDING0 0x070
/*
- * Mailbox0 write-to-set bits. There are 16 mailboxes, 4 per CPU, and
+ * Mailbox write-to-set bits. There are 16 mailboxes, 4 per CPU, and
* these bits are organized by mailbox number and then CPU number. We
* use mailbox 0 for IPIs. The mailbox's interrupt is raised while
* any bit is set.
*/
#define LOCAL_MAILBOX0_SET0 0x080
-/* Mailbox0 write-to-clear bits. */
+#define LOCAL_MAILBOX3_SET0 0x08c
+/* Mailbox write-to-clear bits. */
#define LOCAL_MAILBOX0_CLR0 0x0c0
+#define LOCAL_MAILBOX3_CLR0 0x0cc
#define LOCAL_IRQ_CNTPSIRQ 0
#define LOCAL_IRQ_CNTPNSIRQ 1
@@ -162,7 +167,7 @@ __exception_irq_entry bcm2836_arm_irqchip_handle_irq(struct pt_regs *regs)
u32 stat;
stat = readl_relaxed(intc.base + LOCAL_IRQ_PENDING0 + 4 * cpu);
- if (stat & 0x10) {
+ if (stat & BIT(LOCAL_IRQ_MAILBOX0)) {
#ifdef CONFIG_SMP
void __iomem *mailbox0 = (intc.base +
LOCAL_MAILBOX0_CLR0 + 16 * cpu);
@@ -172,7 +177,7 @@ __exception_irq_entry bcm2836_arm_irqchip_handle_irq(struct pt_regs *regs)
writel(1 << ipi, mailbox0);
handle_IPI(ipi, regs);
#endif
- } else {
+ } else if (stat) {
u32 hwirq = ffs(stat) - 1;
handle_IRQ(irq_linear_revmap(intc.domain, hwirq), regs);
@@ -217,6 +222,24 @@ static struct notifier_block bcm2836_arm_irqchip_cpu_notifier = {
.notifier_call = bcm2836_arm_irqchip_cpu_notify,
.priority = 100,
};
+
+int __init bcm2836_smp_boot_secondary(unsigned int cpu,
+ struct task_struct *idle)
+{
+ unsigned long secondary_startup_phys =
+ (unsigned long)virt_to_phys((void *)secondary_startup);
+
+ dsb();
+ writel(secondary_startup_phys,
+ intc.base + LOCAL_MAILBOX3_SET0 + 16 * cpu);
+
+ return 0;
+}
+
+static const struct smp_operations bcm2836_smp_ops __initconst = {
+ .smp_boot_secondary = bcm2836_smp_boot_secondary,
+};
+
#endif
static const struct irq_domain_ops bcm2836_arm_irqchip_intc_ops = {
@@ -234,9 +257,31 @@ bcm2836_arm_irqchip_smp_init(void)
register_cpu_notifier(&bcm2836_arm_irqchip_cpu_notifier);
set_smp_cross_call(bcm2836_arm_irqchip_send_ipi);
+ smp_set_ops(&bcm2836_smp_ops);
#endif
}
+/*
+ * The LOCAL_IRQ_CNT* timer firings are based off of the external
+ * oscillator with some scaling. The firmware sets up CNTFRQ to
+ * report 19.2Mhz, but doesn't set up the scaling registers.
+ */
+static void bcm2835_init_local_timer_frequency(void)
+{
+ /*
+ * Set the timer to source from the 19.2Mhz crystal clock (bit
+ * 8 unset), and only increment by 1 instead of 2 (bit 9
+ * unset).
+ */
+ writel(0, intc.base + LOCAL_CONTROL);
+
+ /*
+ * Set the timer prescaler to 1:1 (timer freq = input freq *
+ * 2**31 / prescaler)
+ */
+ writel(0x80000000, intc.base + LOCAL_PRESCALER);
+}
+
static int __init bcm2836_arm_irqchip_l1_intc_of_init(struct device_node *node,
struct device_node *parent)
{
@@ -246,6 +291,8 @@ static int __init bcm2836_arm_irqchip_l1_intc_of_init(struct device_node *node,
node->full_name);
}
+ bcm2835_init_local_timer_frequency();
+
intc.domain = irq_domain_add_linear(node, LAST_IRQ + 1,
&bcm2836_arm_irqchip_intc_ops,
NULL);
diff --git a/drivers/irqchip/irq-gic-realview.c b/drivers/irqchip/irq-gic-realview.c
new file mode 100644
index 000000000000..aa46eb280a7f
--- /dev/null
+++ b/drivers/irqchip/irq-gic-realview.c
@@ -0,0 +1,43 @@
+/*
+ * Special GIC quirks for the ARM RealView
+ * Copyright (C) 2015 Linus Walleij
+ */
+#include <linux/of.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <linux/bitops.h>
+#include <linux/irqchip.h>
+#include <linux/irqchip/arm-gic.h>
+
+#define REALVIEW_SYS_LOCK_OFFSET 0x20
+#define REALVIEW_PB11MP_SYS_PLD_CTRL1 0x74
+#define VERSATILE_LOCK_VAL 0xA05F
+#define PLD_INTMODE_MASK BIT(22)|BIT(23)|BIT(24)
+#define PLD_INTMODE_LEGACY 0x0
+#define PLD_INTMODE_NEW_DCC BIT(22)
+#define PLD_INTMODE_NEW_NO_DCC BIT(23)
+#define PLD_INTMODE_FIQ_ENABLE BIT(24)
+
+static int __init
+realview_gic_of_init(struct device_node *node, struct device_node *parent)
+{
+ static struct regmap *map;
+
+ /* The PB11MPCore GIC needs to be configured in the syscon */
+ map = syscon_regmap_lookup_by_compatible("arm,realview-pb11mp-syscon");
+ if (!IS_ERR(map)) {
+ /* new irq mode with no DCC */
+ regmap_write(map, REALVIEW_SYS_LOCK_OFFSET,
+ VERSATILE_LOCK_VAL);
+ regmap_update_bits(map, REALVIEW_PB11MP_SYS_PLD_CTRL1,
+ PLD_INTMODE_NEW_NO_DCC,
+ PLD_INTMODE_MASK);
+ regmap_write(map, REALVIEW_SYS_LOCK_OFFSET, 0x0000);
+ pr_info("TC11MP GIC: set up interrupt controller to NEW mode, no DCC\n");
+ } else {
+ pr_err("TC11MP GIC setup: could not find syscon\n");
+ return -ENXIO;
+ }
+ return gic_of_init(node, parent);
+}
+IRQCHIP_DECLARE(armtc11mp_gic, "arm,tc11mp-gic", realview_gic_of_init);
diff --git a/drivers/irqchip/irq-gic-v2m.c b/drivers/irqchip/irq-gic-v2m.c
index 87f8d104acab..c779f83e511d 100644
--- a/drivers/irqchip/irq-gic-v2m.c
+++ b/drivers/irqchip/irq-gic-v2m.c
@@ -15,9 +15,11 @@
#define pr_fmt(fmt) "GICv2m: " fmt
+#include <linux/acpi.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/kernel.h>
+#include <linux/msi.h>
#include <linux/of_address.h>
#include <linux/of_pci.h>
#include <linux/slab.h>
@@ -55,7 +57,7 @@ static DEFINE_SPINLOCK(v2m_lock);
struct v2m_data {
struct list_head entry;
- struct device_node *node;
+ struct fwnode_handle *fwnode;
struct resource res; /* GICv2m resource */
void __iomem *base; /* GICv2m virt address */
u32 spi_start; /* The SPI number that MSIs start */
@@ -138,6 +140,11 @@ static int gicv2m_irq_gic_domain_alloc(struct irq_domain *domain,
fwspec.param[0] = 0;
fwspec.param[1] = hwirq - 32;
fwspec.param[2] = IRQ_TYPE_EDGE_RISING;
+ } else if (is_fwnode_irqchip(domain->parent->fwnode)) {
+ fwspec.fwnode = domain->parent->fwnode;
+ fwspec.param_count = 2;
+ fwspec.param[0] = hwirq;
+ fwspec.param[1] = IRQ_TYPE_EDGE_RISING;
} else {
return -EINVAL;
}
@@ -254,7 +261,9 @@ static void gicv2m_teardown(void)
list_del(&v2m->entry);
kfree(v2m->bm);
iounmap(v2m->base);
- of_node_put(v2m->node);
+ of_node_put(to_of_node(v2m->fwnode));
+ if (is_fwnode_irqchip(v2m->fwnode))
+ irq_domain_free_fwnode(v2m->fwnode);
kfree(v2m);
}
}
@@ -268,7 +277,7 @@ static int gicv2m_allocate_domains(struct irq_domain *parent)
if (!v2m)
return 0;
- inner_domain = irq_domain_create_tree(of_node_to_fwnode(v2m->node),
+ inner_domain = irq_domain_create_tree(v2m->fwnode,
&gicv2m_domain_ops, v2m);
if (!inner_domain) {
pr_err("Failed to create GICv2m domain\n");
@@ -277,10 +286,10 @@ static int gicv2m_allocate_domains(struct irq_domain *parent)
inner_domain->bus_token = DOMAIN_BUS_NEXUS;
inner_domain->parent = parent;
- pci_domain = pci_msi_create_irq_domain(of_node_to_fwnode(v2m->node),
+ pci_domain = pci_msi_create_irq_domain(v2m->fwnode,
&gicv2m_msi_domain_info,
inner_domain);
- plat_domain = platform_msi_create_irq_domain(of_node_to_fwnode(v2m->node),
+ plat_domain = platform_msi_create_irq_domain(v2m->fwnode,
&gicv2m_pmsi_domain_info,
inner_domain);
if (!pci_domain || !plat_domain) {
@@ -296,8 +305,9 @@ static int gicv2m_allocate_domains(struct irq_domain *parent)
return 0;
}
-static int __init gicv2m_init_one(struct device_node *node,
- struct irq_domain *parent)
+static int __init gicv2m_init_one(struct fwnode_handle *fwnode,
+ u32 spi_start, u32 nr_spis,
+ struct resource *res)
{
int ret;
struct v2m_data *v2m;
@@ -309,13 +319,9 @@ static int __init gicv2m_init_one(struct device_node *node,
}
INIT_LIST_HEAD(&v2m->entry);
- v2m->node = node;
+ v2m->fwnode = fwnode;
- ret = of_address_to_resource(node, 0, &v2m->res);
- if (ret) {
- pr_err("Failed to allocate v2m resource.\n");
- goto err_free_v2m;
- }
+ memcpy(&v2m->res, res, sizeof(struct resource));
v2m->base = ioremap(v2m->res.start, resource_size(&v2m->res));
if (!v2m->base) {
@@ -324,10 +330,9 @@ static int __init gicv2m_init_one(struct device_node *node,
goto err_free_v2m;
}
- if (!of_property_read_u32(node, "arm,msi-base-spi", &v2m->spi_start) &&
- !of_property_read_u32(node, "arm,msi-num-spis", &v2m->nr_spis)) {
- pr_info("Overriding V2M MSI_TYPER (base:%u, num:%u)\n",
- v2m->spi_start, v2m->nr_spis);
+ if (spi_start && nr_spis) {
+ v2m->spi_start = spi_start;
+ v2m->nr_spis = nr_spis;
} else {
u32 typer = readl_relaxed(v2m->base + V2M_MSI_TYPER);
@@ -359,10 +364,9 @@ static int __init gicv2m_init_one(struct device_node *node,
}
list_add_tail(&v2m->entry, &v2m_nodes);
- pr_info("Node %s: range[%#lx:%#lx], SPI[%d:%d]\n", node->name,
- (unsigned long)v2m->res.start, (unsigned long)v2m->res.end,
- v2m->spi_start, (v2m->spi_start + v2m->nr_spis));
+ pr_info("range%pR, SPI[%d:%d]\n", res,
+ v2m->spi_start, (v2m->spi_start + v2m->nr_spis - 1));
return 0;
err_iounmap:
@@ -377,19 +381,36 @@ static struct of_device_id gicv2m_device_id[] = {
{},
};
-int __init gicv2m_of_init(struct device_node *node, struct irq_domain *parent)
+static int __init gicv2m_of_init(struct fwnode_handle *parent_handle,
+ struct irq_domain *parent)
{
int ret = 0;
+ struct device_node *node = to_of_node(parent_handle);
struct device_node *child;
for (child = of_find_matching_node(node, gicv2m_device_id); child;
child = of_find_matching_node(child, gicv2m_device_id)) {
+ u32 spi_start = 0, nr_spis = 0;
+ struct resource res;
+
if (!of_find_property(child, "msi-controller", NULL))
continue;
- ret = gicv2m_init_one(child, parent);
+ ret = of_address_to_resource(child, 0, &res);
+ if (ret) {
+ pr_err("Failed to allocate v2m resource.\n");
+ break;
+ }
+
+ if (!of_property_read_u32(child, "arm,msi-base-spi",
+ &spi_start) &&
+ !of_property_read_u32(child, "arm,msi-num-spis", &nr_spis))
+ pr_info("DT overriding V2M MSI_TYPER (base:%u, num:%u)\n",
+ spi_start, nr_spis);
+
+ ret = gicv2m_init_one(&child->fwnode, spi_start, nr_spis, &res);
if (ret) {
- of_node_put(node);
+ of_node_put(child);
break;
}
}
@@ -400,3 +421,101 @@ int __init gicv2m_of_init(struct device_node *node, struct irq_domain *parent)
gicv2m_teardown();
return ret;
}
+
+#ifdef CONFIG_ACPI
+static int acpi_num_msi;
+
+static struct fwnode_handle *gicv2m_get_fwnode(struct device *dev)
+{
+ struct v2m_data *data;
+
+ if (WARN_ON(acpi_num_msi <= 0))
+ return NULL;
+
+ /* We only return the fwnode of the first MSI frame. */
+ data = list_first_entry_or_null(&v2m_nodes, struct v2m_data, entry);
+ if (!data)
+ return NULL;
+
+ return data->fwnode;
+}
+
+static int __init
+acpi_parse_madt_msi(struct acpi_subtable_header *header,
+ const unsigned long end)
+{
+ int ret;
+ struct resource res;
+ u32 spi_start = 0, nr_spis = 0;
+ struct acpi_madt_generic_msi_frame *m;
+ struct fwnode_handle *fwnode;
+
+ m = (struct acpi_madt_generic_msi_frame *)header;
+ if (BAD_MADT_ENTRY(m, end))
+ return -EINVAL;
+
+ res.start = m->base_address;
+ res.end = m->base_address + SZ_4K - 1;
+ res.flags = IORESOURCE_MEM;
+
+ if (m->flags & ACPI_MADT_OVERRIDE_SPI_VALUES) {
+ spi_start = m->spi_base;
+ nr_spis = m->spi_count;
+
+ pr_info("ACPI overriding V2M MSI_TYPER (base:%u, num:%u)\n",
+ spi_start, nr_spis);
+ }
+
+ fwnode = irq_domain_alloc_fwnode((void *)m->base_address);
+ if (!fwnode) {
+ pr_err("Unable to allocate GICv2m domain token\n");
+ return -EINVAL;
+ }
+
+ ret = gicv2m_init_one(fwnode, spi_start, nr_spis, &res);
+ if (ret)
+ irq_domain_free_fwnode(fwnode);
+
+ return ret;
+}
+
+static int __init gicv2m_acpi_init(struct irq_domain *parent)
+{
+ int ret;
+
+ if (acpi_num_msi > 0)
+ return 0;
+
+ acpi_num_msi = acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_MSI_FRAME,
+ acpi_parse_madt_msi, 0);
+
+ if (acpi_num_msi <= 0)
+ goto err_out;
+
+ ret = gicv2m_allocate_domains(parent);
+ if (ret)
+ goto err_out;
+
+ pci_msi_register_fwnode_provider(&gicv2m_get_fwnode);
+
+ return 0;
+
+err_out:
+ gicv2m_teardown();
+ return -EINVAL;
+}
+#else /* CONFIG_ACPI */
+static int __init gicv2m_acpi_init(struct irq_domain *parent)
+{
+ return -EINVAL;
+}
+#endif /* CONFIG_ACPI */
+
+int __init gicv2m_init(struct fwnode_handle *parent_handle,
+ struct irq_domain *parent)
+{
+ if (is_of_node(parent_handle))
+ return gicv2m_of_init(parent_handle, parent);
+
+ return gicv2m_acpi_init(parent);
+}
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index abf2ffaed392..911758c056c1 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -69,6 +69,7 @@ union gic_base {
};
struct gic_chip_data {
+ struct irq_chip chip;
union gic_base dist_base;
union gic_base cpu_base;
#ifdef CONFIG_CPU_PM
@@ -99,11 +100,7 @@ static u8 gic_cpu_map[NR_GIC_CPU_IF] __read_mostly;
static struct static_key supports_deactivate = STATIC_KEY_INIT_TRUE;
-#ifndef MAX_GIC_NR
-#define MAX_GIC_NR 1
-#endif
-
-static struct gic_chip_data gic_data[MAX_GIC_NR] __read_mostly;
+static struct gic_chip_data gic_data[CONFIG_ARM_GIC_MAX_NR] __read_mostly;
#ifdef CONFIG_GIC_NON_BANKED
static void __iomem *gic_get_percpu_base(union gic_base *base)
@@ -336,7 +333,7 @@ static void __exception_irq_entry gic_handle_irq(struct pt_regs *regs)
irqstat = readl_relaxed(cpu_base + GIC_CPU_INTACK);
irqnr = irqstat & GICC_IAR_INT_ID_MASK;
- if (likely(irqnr > 15 && irqnr < 1021)) {
+ if (likely(irqnr > 15 && irqnr < 1020)) {
if (static_key_true(&supports_deactivate))
writel_relaxed(irqstat, cpu_base + GIC_CPU_EOI);
handle_domain_irq(gic->domain, irqnr, regs);
@@ -383,7 +380,6 @@ static void gic_handle_cascade_irq(struct irq_desc *desc)
}
static struct irq_chip gic_chip = {
- .name = "GIC",
.irq_mask = gic_mask_irq,
.irq_unmask = gic_unmask_irq,
.irq_eoi = gic_eoi_irq,
@@ -417,8 +413,7 @@ static struct irq_chip gic_eoimode1_chip = {
void __init gic_cascade_irq(unsigned int gic_nr, unsigned int irq)
{
- if (gic_nr >= MAX_GIC_NR)
- BUG();
+ BUG_ON(gic_nr >= CONFIG_ARM_GIC_MAX_NR);
irq_set_chained_handler_and_data(irq, gic_handle_cascade_irq,
&gic_data[gic_nr]);
}
@@ -524,7 +519,7 @@ int gic_cpu_if_down(unsigned int gic_nr)
void __iomem *cpu_base;
u32 val = 0;
- if (gic_nr >= MAX_GIC_NR)
+ if (gic_nr >= CONFIG_ARM_GIC_MAX_NR)
return -EINVAL;
cpu_base = gic_data_cpu_base(&gic_data[gic_nr]);
@@ -548,8 +543,7 @@ static void gic_dist_save(unsigned int gic_nr)
void __iomem *dist_base;
int i;
- if (gic_nr >= MAX_GIC_NR)
- BUG();
+ BUG_ON(gic_nr >= CONFIG_ARM_GIC_MAX_NR);
gic_irqs = gic_data[gic_nr].gic_irqs;
dist_base = gic_data_dist_base(&gic_data[gic_nr]);
@@ -587,8 +581,7 @@ static void gic_dist_restore(unsigned int gic_nr)
unsigned int i;
void __iomem *dist_base;
- if (gic_nr >= MAX_GIC_NR)
- BUG();
+ BUG_ON(gic_nr >= CONFIG_ARM_GIC_MAX_NR);
gic_irqs = gic_data[gic_nr].gic_irqs;
dist_base = gic_data_dist_base(&gic_data[gic_nr]);
@@ -634,8 +627,7 @@ static void gic_cpu_save(unsigned int gic_nr)
void __iomem *dist_base;
void __iomem *cpu_base;
- if (gic_nr >= MAX_GIC_NR)
- BUG();
+ BUG_ON(gic_nr >= CONFIG_ARM_GIC_MAX_NR);
dist_base = gic_data_dist_base(&gic_data[gic_nr]);
cpu_base = gic_data_cpu_base(&gic_data[gic_nr]);
@@ -664,8 +656,7 @@ static void gic_cpu_restore(unsigned int gic_nr)
void __iomem *dist_base;
void __iomem *cpu_base;
- if (gic_nr >= MAX_GIC_NR)
- BUG();
+ BUG_ON(gic_nr >= CONFIG_ARM_GIC_MAX_NR);
dist_base = gic_data_dist_base(&gic_data[gic_nr]);
cpu_base = gic_data_cpu_base(&gic_data[gic_nr]);
@@ -703,7 +694,7 @@ static int gic_notifier(struct notifier_block *self, unsigned long cmd, void *v)
{
int i;
- for (i = 0; i < MAX_GIC_NR; i++) {
+ for (i = 0; i < CONFIG_ARM_GIC_MAX_NR; i++) {
#ifdef CONFIG_GIC_NON_BANKED
/* Skip over unused GICs */
if (!gic_data[i].get_base)
@@ -835,8 +826,7 @@ void gic_migrate_target(unsigned int new_cpu_id)
int i, ror_val, cpu = smp_processor_id();
u32 val, cur_target_mask, active_mask;
- if (gic_nr >= MAX_GIC_NR)
- BUG();
+ BUG_ON(gic_nr >= CONFIG_ARM_GIC_MAX_NR);
dist_base = gic_data_dist_base(&gic_data[gic_nr]);
if (!dist_base)
@@ -925,20 +915,15 @@ void __init gic_init_physaddr(struct device_node *node)
static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq,
irq_hw_number_t hw)
{
- struct irq_chip *chip = &gic_chip;
-
- if (static_key_true(&supports_deactivate)) {
- if (d->host_data == (void *)&gic_data[0])
- chip = &gic_eoimode1_chip;
- }
+ struct gic_chip_data *gic = d->host_data;
if (hw < 32) {
irq_set_percpu_devid(irq);
- irq_domain_set_info(d, irq, hw, chip, d->host_data,
+ irq_domain_set_info(d, irq, hw, &gic->chip, d->host_data,
handle_percpu_devid_irq, NULL, NULL);
irq_set_status_flags(irq, IRQ_NOAUTOEN);
} else {
- irq_domain_set_info(d, irq, hw, chip, d->host_data,
+ irq_domain_set_info(d, irq, hw, &gic->chip, d->host_data,
handle_fasteoi_irq, NULL, NULL);
irq_set_probe(irq);
}
@@ -972,7 +957,7 @@ static int gic_irq_domain_translate(struct irq_domain *d,
return 0;
}
- if (fwspec->fwnode->type == FWNODE_IRQCHIP) {
+ if (is_fwnode_irqchip(fwspec->fwnode)) {
if(fwspec->param_count != 2)
return -EINVAL;
@@ -1040,11 +1025,20 @@ static void __init __gic_init_bases(unsigned int gic_nr, int irq_start,
struct gic_chip_data *gic;
int gic_irqs, irq_base, i;
- BUG_ON(gic_nr >= MAX_GIC_NR);
+ BUG_ON(gic_nr >= CONFIG_ARM_GIC_MAX_NR);
gic_check_cpu_features();
gic = &gic_data[gic_nr];
+
+ /* Initialize irq_chip */
+ if (static_key_true(&supports_deactivate) && gic_nr == 0) {
+ gic->chip = gic_eoimode1_chip;
+ } else {
+ gic->chip = gic_chip;
+ gic->chip.name = kasprintf(GFP_KERNEL, "GIC-%d", gic_nr);
+ }
+
#ifdef CONFIG_GIC_NON_BANKED
if (percpu_offset) { /* Frankein-GIC without banked registers... */
unsigned int cpu;
@@ -1196,7 +1190,7 @@ static bool gic_check_eoimode(struct device_node *node, void __iomem **base)
return true;
}
-static int __init
+int __init
gic_of_init(struct device_node *node, struct device_node *parent)
{
void __iomem *cpu_base;
@@ -1234,7 +1228,7 @@ gic_of_init(struct device_node *node, struct device_node *parent)
}
if (IS_ENABLED(CONFIG_ARM_GIC_V2M))
- gicv2m_of_init(node, gic_data[gic_cnt].domain);
+ gicv2m_init(&node->fwnode, gic_data[gic_cnt].domain);
gic_cnt++;
return 0;
@@ -1359,6 +1353,10 @@ static int __init gic_v2_acpi_init(struct acpi_subtable_header *header,
__gic_init_bases(0, -1, dist_base, cpu_base, 0, domain_handle);
acpi_set_irq_model(ACPI_IRQ_MODEL_GIC, domain_handle);
+
+ if (IS_ENABLED(CONFIG_ARM_GIC_V2M))
+ gicv2m_init(NULL, gic_data[0].domain);
+
return 0;
}
IRQCHIP_ACPI_DECLARE(gic_v2, ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR,
diff --git a/drivers/irqchip/irq-mbigen.c b/drivers/irqchip/irq-mbigen.c
new file mode 100644
index 000000000000..4dd3eb8a40b3
--- /dev/null
+++ b/drivers/irqchip/irq-mbigen.c
@@ -0,0 +1,297 @@
+/*
+ * Copyright (C) 2015 Hisilicon Limited, All Rights Reserved.
+ * Author: Jun Ma <majun258@...wei.com>
+ * Author: Yun Wu <wuyun.wu@...wei.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/irqchip.h>
+#include <linux/module.h>
+#include <linux/msi.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+/* Interrupt numbers per mbigen node supported */
+#define IRQS_PER_MBIGEN_NODE 128
+
+/* 64 irqs (Pin0-pin63) are reserved for each mbigen chip */
+#define RESERVED_IRQ_PER_MBIGEN_CHIP 64
+
+/* The maximum IRQ pin number of mbigen chip(start from 0) */
+#define MAXIMUM_IRQ_PIN_NUM 1407
+
+/**
+ * In mbigen vector register
+ * bit[21:12]: event id value
+ * bit[11:0]: device id
+ */
+#define IRQ_EVENT_ID_SHIFT 12
+#define IRQ_EVENT_ID_MASK 0x3ff
+
+/* register range of each mbigen node */
+#define MBIGEN_NODE_OFFSET 0x1000
+
+/* offset of vector register in mbigen node */
+#define REG_MBIGEN_VEC_OFFSET 0x200
+
+/**
+ * offset of clear register in mbigen node
+ * This register is used to clear the status
+ * of interrupt
+ */
+#define REG_MBIGEN_CLEAR_OFFSET 0xa000
+
+/**
+ * offset of interrupt type register
+ * This register is used to configure interrupt
+ * trigger type
+ */
+#define REG_MBIGEN_TYPE_OFFSET 0x0
+
+/**
+ * struct mbigen_device - holds the information of mbigen device.
+ *
+ * @pdev: pointer to the platform device structure of mbigen chip.
+ * @base: mapped address of this mbigen chip.
+ */
+struct mbigen_device {
+ struct platform_device *pdev;
+ void __iomem *base;
+};
+
+static inline unsigned int get_mbigen_vec_reg(irq_hw_number_t hwirq)
+{
+ unsigned int nid, pin;
+
+ hwirq -= RESERVED_IRQ_PER_MBIGEN_CHIP;
+ nid = hwirq / IRQS_PER_MBIGEN_NODE + 1;
+ pin = hwirq % IRQS_PER_MBIGEN_NODE;
+
+ return pin * 4 + nid * MBIGEN_NODE_OFFSET
+ + REG_MBIGEN_VEC_OFFSET;
+}
+
+static inline void get_mbigen_type_reg(irq_hw_number_t hwirq,
+ u32 *mask, u32 *addr)
+{
+ unsigned int nid, irq_ofst, ofst;
+
+ hwirq -= RESERVED_IRQ_PER_MBIGEN_CHIP;
+ nid = hwirq / IRQS_PER_MBIGEN_NODE + 1;
+ irq_ofst = hwirq % IRQS_PER_MBIGEN_NODE;
+
+ *mask = 1 << (irq_ofst % 32);
+ ofst = irq_ofst / 32 * 4;
+
+ *addr = ofst + nid * MBIGEN_NODE_OFFSET
+ + REG_MBIGEN_TYPE_OFFSET;
+}
+
+static inline void get_mbigen_clear_reg(irq_hw_number_t hwirq,
+ u32 *mask, u32 *addr)
+{
+ unsigned int ofst;
+
+ hwirq -= RESERVED_IRQ_PER_MBIGEN_CHIP;
+ ofst = hwirq / 32 * 4;
+
+ *mask = 1 << (hwirq % 32);
+ *addr = ofst + REG_MBIGEN_CLEAR_OFFSET;
+}
+
+static void mbigen_eoi_irq(struct irq_data *data)
+{
+ void __iomem *base = data->chip_data;
+ u32 mask, addr;
+
+ get_mbigen_clear_reg(data->hwirq, &mask, &addr);
+
+ writel_relaxed(mask, base + addr);
+
+ irq_chip_eoi_parent(data);
+}
+
+static int mbigen_set_type(struct irq_data *data, unsigned int type)
+{
+ void __iomem *base = data->chip_data;
+ u32 mask, addr, val;
+
+ if (type != IRQ_TYPE_LEVEL_HIGH && type != IRQ_TYPE_EDGE_RISING)
+ return -EINVAL;
+
+ get_mbigen_type_reg(data->hwirq, &mask, &addr);
+
+ val = readl_relaxed(base + addr);
+
+ if (type == IRQ_TYPE_LEVEL_HIGH)
+ val |= mask;
+ else
+ val &= ~mask;
+
+ writel_relaxed(val, base + addr);
+
+ return 0;
+}
+
+static struct irq_chip mbigen_irq_chip = {
+ .name = "mbigen-v2",
+ .irq_mask = irq_chip_mask_parent,
+ .irq_unmask = irq_chip_unmask_parent,
+ .irq_eoi = mbigen_eoi_irq,
+ .irq_set_type = mbigen_set_type,
+ .irq_set_affinity = irq_chip_set_affinity_parent,
+};
+
+static void mbigen_write_msg(struct msi_desc *desc, struct msi_msg *msg)
+{
+ struct irq_data *d = irq_get_irq_data(desc->irq);
+ void __iomem *base = d->chip_data;
+ u32 val;
+
+ base += get_mbigen_vec_reg(d->hwirq);
+ val = readl_relaxed(base);
+
+ val &= ~(IRQ_EVENT_ID_MASK << IRQ_EVENT_ID_SHIFT);
+ val |= (msg->data << IRQ_EVENT_ID_SHIFT);
+
+ /* The address of doorbell is encoded in mbigen register by default
+ * So,we don't need to program the doorbell address at here
+ */
+ writel_relaxed(val, base);
+}
+
+static int mbigen_domain_translate(struct irq_domain *d,
+ struct irq_fwspec *fwspec,
+ unsigned long *hwirq,
+ unsigned int *type)
+{
+ if (is_of_node(fwspec->fwnode)) {
+ if (fwspec->param_count != 2)
+ return -EINVAL;
+
+ if ((fwspec->param[0] > MAXIMUM_IRQ_PIN_NUM) ||
+ (fwspec->param[0] < RESERVED_IRQ_PER_MBIGEN_CHIP))
+ return -EINVAL;
+ else
+ *hwirq = fwspec->param[0];
+
+ /* If there is no valid irq type, just use the default type */
+ if ((fwspec->param[1] == IRQ_TYPE_EDGE_RISING) ||
+ (fwspec->param[1] == IRQ_TYPE_LEVEL_HIGH))
+ *type = fwspec->param[1];
+ else
+ return -EINVAL;
+
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static int mbigen_irq_domain_alloc(struct irq_domain *domain,
+ unsigned int virq,
+ unsigned int nr_irqs,
+ void *args)
+{
+ struct irq_fwspec *fwspec = args;
+ irq_hw_number_t hwirq;
+ unsigned int type;
+ struct mbigen_device *mgn_chip;
+ int i, err;
+
+ err = mbigen_domain_translate(domain, fwspec, &hwirq, &type);
+ if (err)
+ return err;
+
+ err = platform_msi_domain_alloc(domain, virq, nr_irqs);
+ if (err)
+ return err;
+
+ mgn_chip = platform_msi_get_host_data(domain);
+
+ for (i = 0; i < nr_irqs; i++)
+ irq_domain_set_hwirq_and_chip(domain, virq + i, hwirq + i,
+ &mbigen_irq_chip, mgn_chip->base);
+
+ return 0;
+}
+
+static struct irq_domain_ops mbigen_domain_ops = {
+ .translate = mbigen_domain_translate,
+ .alloc = mbigen_irq_domain_alloc,
+ .free = irq_domain_free_irqs_common,
+};
+
+static int mbigen_device_probe(struct platform_device *pdev)
+{
+ struct mbigen_device *mgn_chip;
+ struct resource *res;
+ struct irq_domain *domain;
+ u32 num_pins;
+
+ mgn_chip = devm_kzalloc(&pdev->dev, sizeof(*mgn_chip), GFP_KERNEL);
+ if (!mgn_chip)
+ return -ENOMEM;
+
+ mgn_chip->pdev = pdev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ mgn_chip->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(mgn_chip->base))
+ return PTR_ERR(mgn_chip->base);
+
+ if (of_property_read_u32(pdev->dev.of_node, "num-pins", &num_pins) < 0) {
+ dev_err(&pdev->dev, "No num-pins property\n");
+ return -EINVAL;
+ }
+
+ domain = platform_msi_create_device_domain(&pdev->dev, num_pins,
+ mbigen_write_msg,
+ &mbigen_domain_ops,
+ mgn_chip);
+
+ if (!domain)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, mgn_chip);
+
+ dev_info(&pdev->dev, "Allocated %d MSIs\n", num_pins);
+
+ return 0;
+}
+
+static const struct of_device_id mbigen_of_match[] = {
+ { .compatible = "hisilicon,mbigen-v2" },
+ { /* END */ }
+};
+MODULE_DEVICE_TABLE(of, mbigen_of_match);
+
+static struct platform_driver mbigen_platform_driver = {
+ .driver = {
+ .name = "Hisilicon MBIGEN-V2",
+ .owner = THIS_MODULE,
+ .of_match_table = mbigen_of_match,
+ },
+ .probe = mbigen_device_probe,
+};
+
+module_platform_driver(mbigen_platform_driver);
+
+MODULE_AUTHOR("Jun Ma <majun258@...wei.com>");
+MODULE_AUTHOR("Yun Wu <wuyun.wu@...wei.com>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Hisilicon MBI Generator driver");
diff --git a/drivers/irqchip/irq-omap-intc.c b/drivers/irqchip/irq-omap-intc.c
index 8587d0f8d8c0..9d1bcfc33e4c 100644
--- a/drivers/irqchip/irq-omap-intc.c
+++ b/drivers/irqchip/irq-omap-intc.c
@@ -47,6 +47,7 @@
#define INTC_ILR0 0x0100
#define ACTIVEIRQ_MASK 0x7f /* omap2/3 active interrupt bits */
+#define SPURIOUSIRQ_MASK (0x1ffffff << 7)
#define INTCPS_NR_ILR_REGS 128
#define INTCPS_NR_MIR_REGS 4
@@ -207,7 +208,6 @@ static int __init omap_alloc_gc_of(struct irq_domain *d, void __iomem *base)
ct = gc->chip_types;
ct->type = IRQ_TYPE_LEVEL_MASK;
- ct->handler = handle_level_irq;
ct->chip.irq_ack = omap_mask_ack_irq;
ct->chip.irq_mask = irq_gc_mask_disable_reg;
@@ -330,11 +330,35 @@ static int __init omap_init_irq(u32 base, struct device_node *node)
static asmlinkage void __exception_irq_entry
omap_intc_handle_irq(struct pt_regs *regs)
{
+ extern unsigned long irq_err_count;
u32 irqnr;
irqnr = intc_readl(INTC_SIR);
+
+ /*
+ * A spurious IRQ can result if interrupt that triggered the
+ * sorting is no longer active during the sorting (10 INTC
+ * functional clock cycles after interrupt assertion). Or a
+ * change in interrupt mask affected the result during sorting
+ * time. There is no special handling required except ignoring
+ * the SIR register value just read and retrying.
+ * See section 6.2.5 of AM335x TRM Literature Number: SPRUH73K
+ *
+ * Many a times, a spurious interrupt situation has been fixed
+ * by adding a flush for the posted write acking the IRQ in
+ * the device driver. Typically, this is going be the device
+ * driver whose interrupt was handled just before the spurious
+ * IRQ occurred. Pay attention to those device drivers if you
+ * run into hitting the spurious IRQ condition below.
+ */
+ if (unlikely((irqnr & SPURIOUSIRQ_MASK) == SPURIOUSIRQ_MASK)) {
+ pr_err_once("%s: spurious irq!\n", __func__);
+ irq_err_count++;
+ omap_ack_irq(NULL);
+ return;
+ }
+
irqnr &= ACTIVEIRQ_MASK;
- WARN_ONCE(!irqnr, "Spurious IRQ ?\n");
handle_domain_irq(domain, irqnr, regs);
}
diff --git a/drivers/irqchip/irq-renesas-intc-irqpin.c b/drivers/irqchip/irq-renesas-intc-irqpin.c
index c325806561be..713177d97c7a 100644
--- a/drivers/irqchip/irq-renesas-intc-irqpin.c
+++ b/drivers/irqchip/irq-renesas-intc-irqpin.c
@@ -31,7 +31,6 @@
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/of_device.h>
-#include <linux/platform_data/irq-renesas-intc-irqpin.h>
#include <linux/pm_runtime.h>
#define INTC_IRQPIN_MAX 8 /* maximum 8 interrupts per driver instance */
@@ -75,18 +74,20 @@ struct intc_irqpin_irq {
struct intc_irqpin_priv {
struct intc_irqpin_iomem iomem[INTC_IRQPIN_REG_NR];
struct intc_irqpin_irq irq[INTC_IRQPIN_MAX];
- struct renesas_intc_irqpin_config config;
- unsigned int number_of_irqs;
+ unsigned int sense_bitfield_width;
struct platform_device *pdev;
struct irq_chip irq_chip;
struct irq_domain *irq_domain;
struct clk *clk;
- bool shared_irqs;
+ unsigned shared_irqs:1;
+ unsigned needs_clk:1;
u8 shared_irq_mask;
};
-struct intc_irqpin_irlm_config {
+struct intc_irqpin_config {
unsigned int irlm_bit;
+ unsigned needs_irlm:1;
+ unsigned needs_clk:1;
};
static unsigned long intc_irqpin_read32(void __iomem *iomem)
@@ -171,7 +172,7 @@ static void intc_irqpin_mask_unmask_prio(struct intc_irqpin_priv *p,
static int intc_irqpin_set_sense(struct intc_irqpin_priv *p, int irq, int value)
{
/* The SENSE register is assumed to be 32-bit. */
- int bitfield_width = p->config.sense_bitfield_width;
+ int bitfield_width = p->sense_bitfield_width;
int shift = 32 - (irq + 1) * bitfield_width;
dev_dbg(&p->pdev->dev, "sense irq = %d, mode = %d\n", irq, value);
@@ -361,8 +362,15 @@ static const struct irq_domain_ops intc_irqpin_irq_domain_ops = {
.xlate = irq_domain_xlate_twocell,
};
-static const struct intc_irqpin_irlm_config intc_irqpin_irlm_r8a777x = {
+static const struct intc_irqpin_config intc_irqpin_irlm_r8a777x = {
.irlm_bit = 23, /* ICR0.IRLM0 */
+ .needs_irlm = 1,
+ .needs_clk = 0,
+};
+
+static const struct intc_irqpin_config intc_irqpin_rmobile = {
+ .needs_irlm = 0,
+ .needs_clk = 1,
};
static const struct of_device_id intc_irqpin_dt_ids[] = {
@@ -371,14 +379,18 @@ static const struct of_device_id intc_irqpin_dt_ids[] = {
.data = &intc_irqpin_irlm_r8a777x },
{ .compatible = "renesas,intc-irqpin-r8a7779",
.data = &intc_irqpin_irlm_r8a777x },
+ { .compatible = "renesas,intc-irqpin-r8a7740",
+ .data = &intc_irqpin_rmobile },
+ { .compatible = "renesas,intc-irqpin-sh73a0",
+ .data = &intc_irqpin_rmobile },
{},
};
MODULE_DEVICE_TABLE(of, intc_irqpin_dt_ids);
static int intc_irqpin_probe(struct platform_device *pdev)
{
+ const struct intc_irqpin_config *config = NULL;
struct device *dev = &pdev->dev;
- struct renesas_intc_irqpin_config *pdata = dev->platform_data;
const struct of_device_id *of_id;
struct intc_irqpin_priv *p;
struct intc_irqpin_iomem *i;
@@ -388,6 +400,8 @@ static int intc_irqpin_probe(struct platform_device *pdev)
void (*enable_fn)(struct irq_data *d);
void (*disable_fn)(struct irq_data *d);
const char *name = dev_name(dev);
+ bool control_parent;
+ unsigned int nirqs;
int ref_irq;
int ret;
int k;
@@ -399,23 +413,28 @@ static int intc_irqpin_probe(struct platform_device *pdev)
}
/* deal with driver instance configuration */
- if (pdata) {
- memcpy(&p->config, pdata, sizeof(*pdata));
- } else {
- of_property_read_u32(dev->of_node, "sense-bitfield-width",
- &p->config.sense_bitfield_width);
- p->config.control_parent = of_property_read_bool(dev->of_node,
- "control-parent");
- }
- if (!p->config.sense_bitfield_width)
- p->config.sense_bitfield_width = 4; /* default to 4 bits */
+ of_property_read_u32(dev->of_node, "sense-bitfield-width",
+ &p->sense_bitfield_width);
+ control_parent = of_property_read_bool(dev->of_node, "control-parent");
+ if (!p->sense_bitfield_width)
+ p->sense_bitfield_width = 4; /* default to 4 bits */
p->pdev = pdev;
platform_set_drvdata(pdev, p);
+ of_id = of_match_device(intc_irqpin_dt_ids, dev);
+ if (of_id && of_id->data) {
+ config = of_id->data;
+ p->needs_clk = config->needs_clk;
+ }
+
p->clk = devm_clk_get(dev, NULL);
if (IS_ERR(p->clk)) {
- dev_warn(dev, "unable to get clock\n");
+ if (p->needs_clk) {
+ dev_err(dev, "unable to get clock\n");
+ ret = PTR_ERR(p->clk);
+ goto err0;
+ }
p->clk = NULL;
}
@@ -443,8 +462,8 @@ static int intc_irqpin_probe(struct platform_device *pdev)
p->irq[k].requested_irq = irq->start;
}
- p->number_of_irqs = k;
- if (p->number_of_irqs < 1) {
+ nirqs = k;
+ if (nirqs < 1) {
dev_err(dev, "not enough IRQ resources\n");
ret = -EINVAL;
goto err0;
@@ -485,20 +504,16 @@ static int intc_irqpin_probe(struct platform_device *pdev)
}
/* configure "individual IRQ mode" where needed */
- of_id = of_match_device(intc_irqpin_dt_ids, dev);
- if (of_id && of_id->data) {
- const struct intc_irqpin_irlm_config *irlm_config = of_id->data;
-
+ if (config && config->needs_irlm) {
if (io[INTC_IRQPIN_REG_IRLM])
intc_irqpin_read_modify_write(p, INTC_IRQPIN_REG_IRLM,
- irlm_config->irlm_bit,
- 1, 1);
+ config->irlm_bit, 1, 1);
else
dev_warn(dev, "unable to select IRLM mode\n");
}
/* mask all interrupts using priority */
- for (k = 0; k < p->number_of_irqs; k++)
+ for (k = 0; k < nirqs; k++)
intc_irqpin_mask_unmask_prio(p, k, 1);
/* clear all pending interrupts */
@@ -506,16 +521,16 @@ static int intc_irqpin_probe(struct platform_device *pdev)
/* scan for shared interrupt lines */
ref_irq = p->irq[0].requested_irq;
- p->shared_irqs = true;
- for (k = 1; k < p->number_of_irqs; k++) {
+ p->shared_irqs = 1;
+ for (k = 1; k < nirqs; k++) {
if (ref_irq != p->irq[k].requested_irq) {
- p->shared_irqs = false;
+ p->shared_irqs = 0;
break;
}
}
/* use more severe masking method if requested */
- if (p->config.control_parent) {
+ if (control_parent) {
enable_fn = intc_irqpin_irq_enable_force;
disable_fn = intc_irqpin_irq_disable_force;
} else if (!p->shared_irqs) {
@@ -534,9 +549,7 @@ static int intc_irqpin_probe(struct platform_device *pdev)
irq_chip->irq_set_wake = intc_irqpin_irq_set_wake;
irq_chip->flags = IRQCHIP_MASK_ON_SUSPEND;
- p->irq_domain = irq_domain_add_simple(dev->of_node,
- p->number_of_irqs,
- p->config.irq_base,
+ p->irq_domain = irq_domain_add_simple(dev->of_node, nirqs, 0,
&intc_irqpin_irq_domain_ops, p);
if (!p->irq_domain) {
ret = -ENXIO;
@@ -555,7 +568,7 @@ static int intc_irqpin_probe(struct platform_device *pdev)
}
} else {
/* request interrupts one by one */
- for (k = 0; k < p->number_of_irqs; k++) {
+ for (k = 0; k < nirqs; k++) {
if (devm_request_irq(dev, p->irq[k].requested_irq,
intc_irqpin_irq_handler, 0, name,
&p->irq[k])) {
@@ -567,17 +580,10 @@ static int intc_irqpin_probe(struct platform_device *pdev)
}
/* unmask all interrupts on prio level */
- for (k = 0; k < p->number_of_irqs; k++)
+ for (k = 0; k < nirqs; k++)
intc_irqpin_mask_unmask_prio(p, k, 0);
- dev_info(dev, "driving %d irqs\n", p->number_of_irqs);
-
- /* warn in case of mismatch if irq base is specified */
- if (p->config.irq_base) {
- if (p->config.irq_base != p->irq[0].domain_irq)
- dev_warn(dev, "irq base mismatch (%d/%d)\n",
- p->config.irq_base, p->irq[0].domain_irq);
- }
+ dev_info(dev, "driving %d irqs\n", nirqs);
return 0;
diff --git a/drivers/irqchip/irq-sunxi-nmi.c b/drivers/irqchip/irq-sunxi-nmi.c
index 4ef178078e5b..0820f67cc9a7 100644
--- a/drivers/irqchip/irq-sunxi-nmi.c
+++ b/drivers/irqchip/irq-sunxi-nmi.c
@@ -50,6 +50,12 @@ static struct sunxi_sc_nmi_reg_offs sun6i_reg_offs = {
.enable = 0x34,
};
+static struct sunxi_sc_nmi_reg_offs sun9i_reg_offs = {
+ .ctrl = 0x00,
+ .pend = 0x08,
+ .enable = 0x04,
+};
+
static inline void sunxi_sc_nmi_write(struct irq_chip_generic *gc, u32 off,
u32 val)
{
@@ -207,3 +213,10 @@ static int __init sun7i_sc_nmi_irq_init(struct device_node *node,
return sunxi_sc_nmi_irq_init(node, &sun7i_reg_offs);
}
IRQCHIP_DECLARE(sun7i_sc_nmi, "allwinner,sun7i-a20-sc-nmi", sun7i_sc_nmi_irq_init);
+
+static int __init sun9i_nmi_irq_init(struct device_node *node,
+ struct device_node *parent)
+{
+ return sunxi_sc_nmi_irq_init(node, &sun9i_reg_offs);
+}
+IRQCHIP_DECLARE(sun9i_nmi, "allwinner,sun9i-a80-nmi", sun9i_nmi_irq_init);
diff --git a/drivers/irqchip/irq-ts4800.c b/drivers/irqchip/irq-ts4800.c
new file mode 100644
index 000000000000..4192bdcd2734
--- /dev/null
+++ b/drivers/irqchip/irq-ts4800.c
@@ -0,0 +1,163 @@
+/*
+ * Multiplexed-IRQs driver for TS-4800's FPGA
+ *
+ * Copyright (c) 2015 - Savoir-faire Linux
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/irqdomain.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/platform_device.h>
+
+#define IRQ_MASK 0x4
+#define IRQ_STATUS 0x8
+
+struct ts4800_irq_data {
+ void __iomem *base;
+ struct irq_domain *domain;
+ struct irq_chip irq_chip;
+};
+
+static void ts4800_irq_mask(struct irq_data *d)
+{
+ struct ts4800_irq_data *data = irq_data_get_irq_chip_data(d);
+ u16 reg = readw(data->base + IRQ_MASK);
+ u16 mask = 1 << d->hwirq;
+
+ writew(reg | mask, data->base + IRQ_MASK);
+}
+
+static void ts4800_irq_unmask(struct irq_data *d)
+{
+ struct ts4800_irq_data *data = irq_data_get_irq_chip_data(d);
+ u16 reg = readw(data->base + IRQ_MASK);
+ u16 mask = 1 << d->hwirq;
+
+ writew(reg & ~mask, data->base + IRQ_MASK);
+}
+
+static int ts4800_irqdomain_map(struct irq_domain *d, unsigned int irq,
+ irq_hw_number_t hwirq)
+{
+ struct ts4800_irq_data *data = d->host_data;
+
+ irq_set_chip_and_handler(irq, &data->irq_chip, handle_simple_irq);
+ irq_set_chip_data(irq, data);
+ irq_set_noprobe(irq);
+
+ return 0;
+}
+
+struct irq_domain_ops ts4800_ic_ops = {
+ .map = ts4800_irqdomain_map,
+ .xlate = irq_domain_xlate_onecell,
+};
+
+static void ts4800_ic_chained_handle_irq(struct irq_desc *desc)
+{
+ struct ts4800_irq_data *data = irq_desc_get_handler_data(desc);
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ u16 status = readw(data->base + IRQ_STATUS);
+
+ chained_irq_enter(chip, desc);
+
+ if (unlikely(status == 0)) {
+ handle_bad_irq(desc);
+ goto out;
+ }
+
+ do {
+ unsigned int bit = __ffs(status);
+ int irq = irq_find_mapping(data->domain, bit);
+
+ status &= ~(1 << bit);
+ generic_handle_irq(irq);
+ } while (status);
+
+out:
+ chained_irq_exit(chip, desc);
+}
+
+static int ts4800_ic_probe(struct platform_device *pdev)
+{
+ struct device_node *node = pdev->dev.of_node;
+ struct ts4800_irq_data *data;
+ struct irq_chip *irq_chip;
+ struct resource *res;
+ int parent_irq;
+
+ data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ data->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(data->base))
+ return PTR_ERR(data->base);
+
+ writew(0xFFFF, data->base + IRQ_MASK);
+
+ parent_irq = irq_of_parse_and_map(node, 0);
+ if (!parent_irq) {
+ dev_err(&pdev->dev, "failed to get parent IRQ\n");
+ return -EINVAL;
+ }
+
+ irq_chip = &data->irq_chip;
+ irq_chip->name = dev_name(&pdev->dev);
+ irq_chip->irq_mask = ts4800_irq_mask;
+ irq_chip->irq_unmask = ts4800_irq_unmask;
+
+ data->domain = irq_domain_add_linear(node, 8, &ts4800_ic_ops, data);
+ if (!data->domain) {
+ dev_err(&pdev->dev, "cannot add IRQ domain\n");
+ return -ENOMEM;
+ }
+
+ irq_set_chained_handler_and_data(parent_irq,
+ ts4800_ic_chained_handle_irq, data);
+
+ platform_set_drvdata(pdev, data);
+
+ return 0;
+}
+
+static int ts4800_ic_remove(struct platform_device *pdev)
+{
+ struct ts4800_irq_data *data = platform_get_drvdata(pdev);
+
+ irq_domain_remove(data->domain);
+
+ return 0;
+}
+
+static const struct of_device_id ts4800_ic_of_match[] = {
+ { .compatible = "technologic,ts4800-irqc", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ts4800_ic_of_match);
+
+static struct platform_driver ts4800_ic_driver = {
+ .probe = ts4800_ic_probe,
+ .remove = ts4800_ic_remove,
+ .driver = {
+ .name = "ts4800-irqc",
+ .of_match_table = ts4800_ic_of_match,
+ },
+};
+module_platform_driver(ts4800_ic_driver);
+
+MODULE_AUTHOR("Damien Riegel <damien.riegel@...oirfairelinux.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:ts4800_irqc");
diff --git a/drivers/irqchip/irq-zevio.c b/drivers/irqchip/irq-zevio.c
index 4c48fa88a03d..cb9d8ec37507 100644
--- a/drivers/irqchip/irq-zevio.c
+++ b/drivers/irqchip/irq-zevio.c
@@ -43,8 +43,7 @@ static void __iomem *zevio_irq_io;
static void zevio_irq_ack(struct irq_data *irqd)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(irqd);
- struct irq_chip_regs *regs =
- &container_of(irqd->chip, struct irq_chip_type, chip)->regs;
+ struct irq_chip_regs *regs = &irq_data_get_chip_type(irqd)->regs;
readl(gc->reg_base + regs->ack);
}
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 7eaa4c87fec7..7a0df3fdbfae 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -257,6 +257,7 @@ void pci_msi_mask_irq(struct irq_data *data)
{
msi_set_mask_bit(data, 1);
}
+EXPORT_SYMBOL_GPL(pci_msi_mask_irq);
/**
* pci_msi_unmask_irq - Generic irq chip callback to unmask PCI/MSI interrupts
@@ -266,6 +267,7 @@ void pci_msi_unmask_irq(struct irq_data *data)
{
msi_set_mask_bit(data, 0);
}
+EXPORT_SYMBOL_GPL(pci_msi_unmask_irq);
void default_restore_msi_irqs(struct pci_dev *dev)
{
@@ -1126,6 +1128,7 @@ struct pci_dev *msi_desc_to_pci_dev(struct msi_desc *desc)
{
return to_pci_dev(desc->dev);
}
+EXPORT_SYMBOL(msi_desc_to_pci_dev);
void *msi_desc_to_pci_sysdata(struct msi_desc *desc)
{
@@ -1285,6 +1288,7 @@ struct irq_domain *pci_msi_create_irq_domain(struct fwnode_handle *fwnode,
domain->bus_token = DOMAIN_BUS_PCI_MSI;
return domain;
}
+EXPORT_SYMBOL_GPL(pci_msi_create_irq_domain);
/**
* pci_msi_domain_alloc_irqs - Allocate interrupts for @dev in @domain
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index a32ba753e413..d3f32d6417ef 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -9,7 +9,9 @@
#include <linux/delay.h>
#include <linux/init.h>
+#include <linux/irqdomain.h>
#include <linux/pci.h>
+#include <linux/msi.h>
#include <linux/pci_hotplug.h>
#include <linux/module.h>
#include <linux/pci-aspm.h>
@@ -689,6 +691,46 @@ static struct acpi_bus_type acpi_pci_bus = {
.cleanup = pci_acpi_cleanup,
};
+
+static struct fwnode_handle *(*pci_msi_get_fwnode_cb)(struct device *dev);
+
+/**
+ * pci_msi_register_fwnode_provider - Register callback to retrieve fwnode
+ * @fn: Callback matching a device to a fwnode that identifies a PCI
+ * MSI domain.
+ *
+ * This should be called by irqchip driver, which is the parent of
+ * the MSI domain to provide callback interface to query fwnode.
+ */
+void
+pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *))
+{
+ pci_msi_get_fwnode_cb = fn;
+}
+
+/**
+ * pci_host_bridge_acpi_msi_domain - Retrieve MSI domain of a PCI host bridge
+ * @bus: The PCI host bridge bus.
+ *
+ * This function uses the callback function registered by
+ * pci_msi_register_fwnode_provider() to retrieve the irq_domain with
+ * type DOMAIN_BUS_PCI_MSI of the specified host bridge bus.
+ * This returns NULL on error or when the domain is not found.
+ */
+struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus)
+{
+ struct fwnode_handle *fwnode;
+
+ if (!pci_msi_get_fwnode_cb)
+ return NULL;
+
+ fwnode = pci_msi_get_fwnode_cb(&bus->dev);
+ if (!fwnode)
+ return NULL;
+
+ return irq_find_matching_fwnode(fwnode, DOMAIN_BUS_PCI_MSI);
+}
+
static int __init acpi_pci_init(void)
{
int ret;
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index edb1984201e9..553a029e37f1 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -672,6 +672,8 @@ static struct irq_domain *pci_host_bridge_msi_domain(struct pci_bus *bus)
* should be called from here.
*/
d = pci_host_bridge_of_msi_domain(bus);
+ if (!d)
+ d = pci_host_bridge_acpi_msi_domain(bus);
return d;
}
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index ad16809c8596..cb30edbfe9fc 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -195,6 +195,7 @@ extern void disable_irq(unsigned int irq);
extern void disable_percpu_irq(unsigned int irq);
extern void enable_irq(unsigned int irq);
extern void enable_percpu_irq(unsigned int irq, unsigned int type);
+extern bool irq_percpu_is_enabled(unsigned int irq);
extern void irq_wake_thread(unsigned int irq, void *dev_id);
/* The following three functions are for the core kernel use only. */
diff --git a/include/linux/irqchip/arm-gic.h b/include/linux/irqchip/arm-gic.h
index bae69e5d693c..9c940263ca23 100644
--- a/include/linux/irqchip/arm-gic.h
+++ b/include/linux/irqchip/arm-gic.h
@@ -103,10 +103,21 @@ struct device_node;
void gic_cascade_irq(unsigned int gic_nr, unsigned int irq);
int gic_cpu_if_down(unsigned int gic_nr);
+/*
+ * Subdrivers that need some preparatory work can initialize their
+ * chips and call this to register their GICs.
+ */
+int gic_of_init(struct device_node *node, struct device_node *parent);
+
+/*
+ * Legacy platforms not converted to DT yet must use this to init
+ * their GIC
+ */
void gic_init(unsigned int nr, int start,
void __iomem *dist , void __iomem *cpu);
-int gicv2m_of_init(struct device_node *node, struct irq_domain *parent);
+int gicv2m_init(struct fwnode_handle *parent_handle,
+ struct irq_domain *parent);
void gic_send_sgi(unsigned int cpu_id, unsigned int irq);
int gic_get_cpu_id(unsigned int cpu);
diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h
index a587a33363c7..dcca77c4b9d2 100644
--- a/include/linux/irqdesc.h
+++ b/include/linux/irqdesc.h
@@ -1,6 +1,8 @@
#ifndef _LINUX_IRQDESC_H
#define _LINUX_IRQDESC_H
+#include <linux/rcupdate.h>
+
/*
* Core internal functions to deal with irq descriptors
*/
@@ -40,6 +42,7 @@ struct pt_regs;
* IRQF_NO_SUSPEND set
* @force_resume_depth: number of irqactions on a irq descriptor with
* IRQF_FORCE_RESUME set
+ * @rcu: rcu head for delayed free
* @dir: /proc/irq/ procfs entry
* @name: flow handler name for /proc/interrupts output
*/
@@ -82,6 +85,9 @@ struct irq_desc {
#ifdef CONFIG_PROC_FS
struct proc_dir_entry *dir;
#endif
+#ifdef CONFIG_SPARSE_IRQ
+ struct rcu_head rcu;
+#endif
int parent_irq;
struct module *owner;
const char *name;
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index d5e5c5bef28c..f64622ad02c1 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -211,6 +211,11 @@ static inline struct fwnode_handle *of_node_to_fwnode(struct device_node *node)
return node ? &node->fwnode : NULL;
}
+static inline bool is_fwnode_irqchip(struct fwnode_handle *fwnode)
+{
+ return fwnode && fwnode->type == FWNODE_IRQCHIP;
+}
+
static inline struct irq_domain *irq_find_matching_host(struct device_node *node,
enum irq_domain_bus_token bus_token)
{
@@ -367,6 +372,9 @@ static inline int irq_domain_alloc_irqs(struct irq_domain *domain,
return __irq_domain_alloc_irqs(domain, -1, nr_irqs, node, arg, false);
}
+extern int irq_domain_alloc_irqs_recursive(struct irq_domain *domain,
+ unsigned int irq_base,
+ unsigned int nr_irqs, void *arg);
extern int irq_domain_set_hwirq_and_chip(struct irq_domain *domain,
unsigned int virq,
irq_hw_number_t hwirq,
@@ -410,6 +418,11 @@ static inline bool irq_domain_is_hierarchy(struct irq_domain *domain)
static inline void irq_dispose_mapping(unsigned int virq) { }
static inline void irq_domain_activate_irq(struct irq_data *data) { }
static inline void irq_domain_deactivate_irq(struct irq_data *data) { }
+static inline struct irq_domain *irq_find_matching_fwnode(
+ struct fwnode_handle *fwnode, enum irq_domain_bus_token bus_token)
+{
+ return NULL;
+}
#endif /* !CONFIG_IRQ_DOMAIN */
#endif /* _LINUX_IRQDOMAIN_H */
diff --git a/include/linux/msi.h b/include/linux/msi.h
index f71a25e5fd25..1c6342ab8c0e 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -174,6 +174,7 @@ struct msi_controller {
#include <asm/msi.h>
struct irq_domain;
+struct irq_domain_ops;
struct irq_chip;
struct device_node;
struct fwnode_handle;
@@ -279,6 +280,23 @@ struct irq_domain *platform_msi_create_irq_domain(struct fwnode_handle *fwnode,
int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec,
irq_write_msi_msg_t write_msi_msg);
void platform_msi_domain_free_irqs(struct device *dev);
+
+/* When an MSI domain is used as an intermediate domain */
+int msi_domain_prepare_irqs(struct irq_domain *domain, struct device *dev,
+ int nvec, msi_alloc_info_t *args);
+int msi_domain_populate_irqs(struct irq_domain *domain, struct device *dev,
+ int virq, int nvec, msi_alloc_info_t *args);
+struct irq_domain *
+platform_msi_create_device_domain(struct device *dev,
+ unsigned int nvec,
+ irq_write_msi_msg_t write_msi_msg,
+ const struct irq_domain_ops *ops,
+ void *host_data);
+int platform_msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
+ unsigned int nr_irqs);
+void platform_msi_domain_free(struct irq_domain *domain, unsigned int virq,
+ unsigned int nvec);
+void *platform_msi_get_host_data(struct irq_domain *domain);
#endif /* CONFIG_GENERIC_MSI_IRQ_DOMAIN */
#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 6ae25aae88fd..d86378c226fb 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1946,6 +1946,16 @@ static inline struct irq_domain *
pci_host_bridge_of_msi_domain(struct pci_bus *bus) { return NULL; }
#endif /* CONFIG_OF */
+#ifdef CONFIG_ACPI
+struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus);
+
+void
+pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *));
+#else
+static inline struct irq_domain *
+pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) { return NULL; }
+#endif
+
#ifdef CONFIG_EEH
static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev)
{
diff --git a/include/linux/platform_data/irq-renesas-intc-irqpin.h b/include/linux/platform_data/irq-renesas-intc-irqpin.h
deleted file mode 100644
index e4cb911066a6..000000000000
--- a/include/linux/platform_data/irq-renesas-intc-irqpin.h
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- * Renesas INTC External IRQ Pin Driver
- *
- * Copyright (C) 2013 Magnus Damm
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#ifndef __IRQ_RENESAS_INTC_IRQPIN_H__
-#define __IRQ_RENESAS_INTC_IRQPIN_H__
-
-struct renesas_intc_irqpin_config {
- unsigned int sense_bitfield_width;
- unsigned int irq_base;
- bool control_parent;
-};
-
-#endif /* __IRQ_RENESAS_INTC_IRQPIN_H__ */
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 15206453b12a..5797909f4e5b 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -338,7 +338,6 @@ void handle_nested_irq(unsigned int irq)
raw_spin_lock_irq(&desc->lock);
desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
- kstat_incr_irqs_this_cpu(desc);
action = desc->action;
if (unlikely(!action || irqd_irq_disabled(&desc->irq_data))) {
@@ -346,6 +345,7 @@ void handle_nested_irq(unsigned int irq)
goto out_unlock;
}
+ kstat_incr_irqs_this_cpu(desc);
irqd_set(&desc->irq_data, IRQD_IRQ_INPROGRESS);
raw_spin_unlock_irq(&desc->lock);
@@ -412,13 +412,13 @@ void handle_simple_irq(struct irq_desc *desc)
goto out_unlock;
desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
- kstat_incr_irqs_this_cpu(desc);
if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
desc->istate |= IRQS_PENDING;
goto out_unlock;
}
+ kstat_incr_irqs_this_cpu(desc);
handle_irq_event(desc);
out_unlock:
@@ -462,7 +462,6 @@ void handle_level_irq(struct irq_desc *desc)
goto out_unlock;
desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
- kstat_incr_irqs_this_cpu(desc);
/*
* If its disabled or no action available
@@ -473,6 +472,7 @@ void handle_level_irq(struct irq_desc *desc)
goto out_unlock;
}
+ kstat_incr_irqs_this_cpu(desc);
handle_irq_event(desc);
cond_unmask_irq(desc);
@@ -532,7 +532,6 @@ void handle_fasteoi_irq(struct irq_desc *desc)
goto out;
desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
- kstat_incr_irqs_this_cpu(desc);
/*
* If its disabled or no action available
@@ -544,6 +543,7 @@ void handle_fasteoi_irq(struct irq_desc *desc)
goto out;
}
+ kstat_incr_irqs_this_cpu(desc);
if (desc->istate & IRQS_ONESHOT)
mask_irq(desc);
@@ -950,6 +950,7 @@ void irq_chip_ack_parent(struct irq_data *data)
data = data->parent_data;
data->chip->irq_ack(data);
}
+EXPORT_SYMBOL_GPL(irq_chip_ack_parent);
/**
* irq_chip_mask_parent - Mask the parent interrupt
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 239e2ae2c947..0409da0bcc33 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -159,6 +159,7 @@ static struct irq_desc *alloc_desc(int irq, int node, struct module *owner)
raw_spin_lock_init(&desc->lock);
lockdep_set_class(&desc->lock, &irq_desc_lock_class);
+ init_rcu_head(&desc->rcu);
desc_set_defaults(irq, desc, node, owner);
@@ -171,6 +172,15 @@ err_desc:
return NULL;
}
+static void delayed_free_desc(struct rcu_head *rhp)
+{
+ struct irq_desc *desc = container_of(rhp, struct irq_desc, rcu);
+
+ free_masks(desc);
+ free_percpu(desc->kstat_irqs);
+ kfree(desc);
+}
+
static void free_desc(unsigned int irq)
{
struct irq_desc *desc = irq_to_desc(irq);
@@ -187,9 +197,12 @@ static void free_desc(unsigned int irq)
delete_irq_desc(irq);
mutex_unlock(&sparse_irq_lock);
- free_masks(desc);
- free_percpu(desc->kstat_irqs);
- kfree(desc);
+ /*
+ * We free the descriptor, masks and stat fields via RCU. That
+ * allows demultiplex interrupts to do rcu based management of
+ * the child interrupts.
+ */
+ call_rcu(&desc->rcu, delayed_free_desc);
}
static int alloc_descs(unsigned int start, unsigned int cnt, int node,
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 22aa9612ef7c..8cf95de1ab3f 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -60,6 +60,7 @@ struct fwnode_handle *irq_domain_alloc_fwnode(void *data)
fwid->fwnode.type = FWNODE_IRQCHIP;
return &fwid->fwnode;
}
+EXPORT_SYMBOL_GPL(irq_domain_alloc_fwnode);
/**
* irq_domain_free_fwnode - Free a non-OF-backed fwnode_handle
@@ -70,13 +71,14 @@ void irq_domain_free_fwnode(struct fwnode_handle *fwnode)
{
struct irqchip_fwid *fwid;
- if (WARN_ON(fwnode->type != FWNODE_IRQCHIP))
+ if (WARN_ON(!is_fwnode_irqchip(fwnode)))
return;
fwid = container_of(fwnode, struct irqchip_fwid, fwnode);
kfree(fwid->name);
kfree(fwid);
}
+EXPORT_SYMBOL_GPL(irq_domain_free_fwnode);
/**
* __irq_domain_add() - Allocate a new irq_domain data structure
@@ -1013,6 +1015,7 @@ struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
return NULL;
}
+EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);
/**
* irq_domain_set_hwirq_and_chip - Set hwirq and irqchip of @virq at @domain
@@ -1125,9 +1128,9 @@ static void irq_domain_free_irqs_recursive(struct irq_domain *domain,
}
}
-static int irq_domain_alloc_irqs_recursive(struct irq_domain *domain,
- unsigned int irq_base,
- unsigned int nr_irqs, void *arg)
+int irq_domain_alloc_irqs_recursive(struct irq_domain *domain,
+ unsigned int irq_base,
+ unsigned int nr_irqs, void *arg)
{
int ret = 0;
struct irq_domain *parent = domain->parent;
@@ -1343,6 +1346,7 @@ struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
return (irq_data && irq_data->domain == domain) ? irq_data : NULL;
}
+EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);
/**
* irq_domain_set_info - Set the complete data for a @virq in @domain
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 0eebaeef317b..c84670c373f9 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -1743,6 +1743,31 @@ out:
}
EXPORT_SYMBOL_GPL(enable_percpu_irq);
+/**
+ * irq_percpu_is_enabled - Check whether the per cpu irq is enabled
+ * @irq: Linux irq number to check for
+ *
+ * Must be called from a non migratable context. Returns the enable
+ * state of a per cpu interrupt on the current cpu.
+ */
+bool irq_percpu_is_enabled(unsigned int irq)
+{
+ unsigned int cpu = smp_processor_id();
+ struct irq_desc *desc;
+ unsigned long flags;
+ bool is_enabled;
+
+ desc = irq_get_desc_lock(irq, &flags, IRQ_GET_DESC_CHECK_PERCPU);
+ if (!desc)
+ return false;
+
+ is_enabled = cpumask_test_cpu(cpu, desc->percpu_enabled);
+ irq_put_desc_unlock(desc, flags);
+
+ return is_enabled;
+}
+EXPORT_SYMBOL_GPL(irq_percpu_is_enabled);
+
void disable_percpu_irq(unsigned int irq)
{
unsigned int cpu = smp_processor_id();
diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index 6b0c0b74a2a1..15b249e7c673 100644
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -252,6 +252,60 @@ struct irq_domain *msi_create_irq_domain(struct fwnode_handle *fwnode,
&msi_domain_ops, info);
}
+int msi_domain_prepare_irqs(struct irq_domain *domain, struct device *dev,
+ int nvec, msi_alloc_info_t *arg)
+{
+ struct msi_domain_info *info = domain->host_data;
+ struct msi_domain_ops *ops = info->ops;
+ int ret;
+
+ ret = ops->msi_check(domain, info, dev);
+ if (ret == 0)
+ ret = ops->msi_prepare(domain, dev, nvec, arg);
+
+ return ret;
+}
+
+int msi_domain_populate_irqs(struct irq_domain *domain, struct device *dev,
+ int virq, int nvec, msi_alloc_info_t *arg)
+{
+ struct msi_domain_info *info = domain->host_data;
+ struct msi_domain_ops *ops = info->ops;
+ struct msi_desc *desc;
+ int ret = 0;
+
+ for_each_msi_entry(desc, dev) {
+ /* Don't even try the multi-MSI brain damage. */
+ if (WARN_ON(!desc->irq || desc->nvec_used != 1)) {
+ ret = -EINVAL;
+ break;
+ }
+
+ if (!(desc->irq >= virq && desc->irq < (virq + nvec)))
+ continue;
+
+ ops->set_desc(arg, desc);
+ /* Assumes the domain mutex is held! */
+ ret = irq_domain_alloc_irqs_recursive(domain, virq, 1, arg);
+ if (ret)
+ break;
+
+ irq_set_msi_desc_off(virq, 0, desc);
+ }
+
+ if (ret) {
+ /* Mop up the damage */
+ for_each_msi_entry(desc, dev) {
+ if (!(desc->irq >= virq && desc->irq < (virq + nvec)))
+ continue;
+
+ irq_domain_free_irqs_common(domain, desc->irq, 1);
+ }
+ }
+
+ return ret;
+}
+
/**
* msi_domain_alloc_irqs - Allocate interrupts from a MSI interrupt domain
* @domain: The domain to allocate from
@@ -270,9 +324,7 @@ int msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev,
struct msi_desc *desc;
int i, ret, virq = -1;
- ret = ops->msi_check(domain, info, dev);
- if (ret == 0)
- ret = ops->msi_prepare(domain, dev, nvec, &arg);
+ ret = msi_domain_prepare_irqs(domain, dev, nvec, &arg);
if (ret)
return ret;
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