| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <1584689540-5227-6-git-send-email-weiyi.lu@mediatek.com>
Date: Fri, 20 Mar 2020 15:32:14 +0800
From: Weiyi Lu <weiyi.lu@...iatek.com>
To: Matthias Brugger <matthias.bgg@...il.com>,
Nicolas Boichat <drinkcat@...omium.org>,
Rob Herring <robh@...nel.org>,
Sascha Hauer <kernel@...gutronix.de>
CC: James Liao <jamesjj.liao@...iatek.com>,
Fan Chen <fan.chen@...iatek.com>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>,
<linux-mediatek@...ts.infradead.org>,
<srv_heupstream@...iatek.com>, Weiyi Lu <weiyi.lu@...iatek.com>
Subject: [PATCH v13 05/11] soc: mediatek: Add multiple step bus protection control
Both MT8183 & MT6765 have more control steps of bus protection
than previous project. And there add more bus protection registers
reside at infracfg & smi-common.
Extend function to support multiple step bus protection control
with more customized arguments.
And then use bp_table for bus protection of all compatibles,
instead of mixing bus_prot_mask and bus_prot_reg_update.
Signed-off-by: Weiyi Lu <weiyi.lu@...iatek.com>
---
drivers/soc/mediatek/mtk-scpsys.c | 206 ++++++++++++++++++++++++++------------
drivers/soc/mediatek/scpsys.h | 42 +++++++-
2 files changed, 182 insertions(+), 66 deletions(-)
diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
index e50a568..a4fb0b23 100644
--- a/drivers/soc/mediatek/mtk-scpsys.c
+++ b/drivers/soc/mediatek/mtk-scpsys.c
@@ -88,9 +88,9 @@
* @ctl_offs: The offset for main power control register.
* @sram_pdn_bits: The mask for sram power control bits.
* @sram_pdn_ack_bits: The mask for sram power control acked bits.
- * @bus_prot_mask: The mask for single step bus protection.
* @basic_clk_name: The basic clocks required by this power domain.
* @caps: The flag for active wake-up action.
+ * @bp_table: The mask table for multiple step bus protection.
*/
struct scp_domain_data {
const char *name;
@@ -98,9 +98,9 @@ struct scp_domain_data {
int ctl_offs;
u32 sram_pdn_bits;
u32 sram_pdn_ack_bits;
- u32 bus_prot_mask;
const char *basic_clk_name[MAX_CLKS];
u8 caps;
+ struct bus_prot bp_table[MAX_STEPS];
};
struct scp;
@@ -124,8 +124,8 @@ struct scp {
struct device *dev;
void __iomem *base;
struct regmap *infracfg;
+ struct regmap *smi_common;
struct scp_ctrl_reg ctrl_reg;
- bool bus_prot_reg_update;
};
struct scp_subdomain {
@@ -139,7 +139,6 @@ struct scp_soc_data {
const struct scp_subdomain *subdomains;
int num_subdomains;
const struct scp_ctrl_reg regs;
- bool bus_prot_reg_update;
};
static int scpsys_domain_is_on(struct scp_domain *scpd)
@@ -249,53 +248,102 @@ static int scpsys_sram_disable(struct scp_domain *scpd, void __iomem *ctl_addr)
MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
}
+static int set_bus_protection(struct regmap *map, struct bus_prot *bp)
+{
+ u32 val;
+ u32 set_ofs = bp->set_ofs;
+ u32 en_ofs = bp->en_ofs;
+ u32 sta_ofs = bp->sta_ofs;
+ u32 mask = bp->mask;
+
+ if (set_ofs)
+ regmap_write(map, set_ofs, mask);
+ else
+ regmap_update_bits(map, en_ofs, mask, mask);
+
+ return regmap_read_poll_timeout(map, sta_ofs,
+ val, (val & mask) == mask,
+ MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
+}
+
+static int clear_bus_protection(struct regmap *map, struct bus_prot *bp)
+{
+ u32 val;
+ u32 clr_ofs = bp->clr_ofs;
+ u32 en_ofs = bp->en_ofs;
+ u32 sta_ofs = bp->sta_ofs;
+ u32 mask = bp->mask;
+ bool ignore_ack = bp->ignore_clr_ack;
+
+ if (clr_ofs)
+ regmap_write(map, clr_ofs, mask);
+ else
+ regmap_update_bits(map, en_ofs, mask, 0);
+
+ if (ignore_ack)
+ return 0;
+
+ return regmap_read_poll_timeout(map, sta_ofs,
+ val, !(val & mask),
+ MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
+}
+
static int scpsys_bus_protect_enable(struct scp_domain *scpd)
{
struct scp *scp = scpd->scp;
+ const struct bus_prot *bp_table = scpd->data->bp_table;
struct regmap *infracfg = scp->infracfg;
- u32 mask = scpd->data->bus_prot_mask;
- bool reg_update = scp->bus_prot_reg_update;
- u32 val;
- int ret;
+ struct regmap *smi_common = scp->smi_common;
+ int i;
- if (!mask)
- return 0;
+ for (i = 0; i < MAX_STEPS; i++) {
+ struct regmap *map = NULL;
+ int ret;
+ struct bus_prot bp = bp_table[i];
- if (reg_update)
- regmap_update_bits(infracfg, INFRA_TOPAXI_PROTECTEN, mask,
- mask);
- else
- regmap_write(infracfg, INFRA_TOPAXI_PROTECTEN_SET, mask);
+ if (bp.type == IFR_TYPE)
+ map = infracfg;
+ else if (bp.type == SMI_TYPE)
+ map = smi_common;
+ else
+ break;
- ret = regmap_read_poll_timeout(infracfg, INFRA_TOPAXI_PROTECTSTA1,
- val, (val & mask) == mask,
- MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
+ ret = set_bus_protection(map, &bp);
- return ret;
+ if (ret)
+ return ret;
+ }
+
+ return 0;
}
static int scpsys_bus_protect_disable(struct scp_domain *scpd)
{
struct scp *scp = scpd->scp;
+ const struct bus_prot *bp_table = scpd->data->bp_table;
struct regmap *infracfg = scp->infracfg;
- u32 mask = scpd->data->bus_prot_mask;
- bool reg_update = scp->bus_prot_reg_update;
- u32 val;
- int ret;
+ struct regmap *smi_common = scp->smi_common;
+ int i;
- if (!mask)
- return 0;
+ for (i = MAX_STEPS - 1; i >= 0; i--) {
+ struct regmap *map = NULL;
+ int ret;
+ struct bus_prot bp = bp_table[i];
- if (reg_update)
- regmap_update_bits(infracfg, INFRA_TOPAXI_PROTECTEN, mask, 0);
- else
- regmap_write(infracfg, INFRA_TOPAXI_PROTECTEN_CLR, mask);
+ if (bp.type == IFR_TYPE)
+ map = infracfg;
+ else if (bp.type == SMI_TYPE)
+ map = smi_common;
+ else
+ continue;
- ret = regmap_read_poll_timeout(infracfg, INFRA_TOPAXI_PROTECTSTA1,
- val, !(val & mask),
- MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
+ ret = clear_bus_protection(map, &bp);
- return ret;
+ if (ret)
+ return ret;
+ }
+
+ return 0;
}
static int scpsys_power_on(struct generic_pm_domain *genpd)
@@ -430,8 +478,7 @@ static int init_basic_clks(struct platform_device *pdev, struct clk **clk,
static struct scp *init_scp(struct platform_device *pdev,
const struct scp_domain_data *scp_domain_data, int num,
- const struct scp_ctrl_reg *scp_ctrl_reg,
- bool bus_prot_reg_update)
+ const struct scp_ctrl_reg *scp_ctrl_reg)
{
struct genpd_onecell_data *pd_data;
struct resource *res;
@@ -445,8 +492,6 @@ static struct scp *init_scp(struct platform_device *pdev,
scp->ctrl_reg.pwr_sta_offs = scp_ctrl_reg->pwr_sta_offs;
scp->ctrl_reg.pwr_sta2nd_offs = scp_ctrl_reg->pwr_sta2nd_offs;
- scp->bus_prot_reg_update = bus_prot_reg_update;
-
scp->dev = &pdev->dev;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -474,6 +519,17 @@ static struct scp *init_scp(struct platform_device *pdev,
return ERR_CAST(scp->infracfg);
}
+ scp->smi_common = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
+ "smi_comm");
+
+ if (scp->smi_common == ERR_PTR(-ENODEV)) {
+ scp->smi_common = NULL;
+ } else if (IS_ERR(scp->smi_common)) {
+ dev_err(&pdev->dev, "Cannot find smi_common controller: %ld\n",
+ PTR_ERR(scp->smi_common));
+ return ERR_CAST(scp->smi_common);
+ }
+
for (i = 0; i < num; i++) {
struct scp_domain *scpd = &scp->domains[i];
const struct scp_domain_data *data = &scp_domain_data[i];
@@ -556,8 +612,11 @@ static void mtk_register_power_domains(struct platform_device *pdev,
.name = "conn",
.sta_mask = PWR_STATUS_CONN,
.ctl_offs = SPM_CONN_PWR_CON,
- .bus_prot_mask = MT2701_TOP_AXI_PROT_EN_CONN_M |
- MT2701_TOP_AXI_PROT_EN_CONN_S,
+ .bp_table = {
+ BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228,
+ MT2701_TOP_AXI_PROT_EN_CONN_M |
+ MT2701_TOP_AXI_PROT_EN_CONN_S),
+ },
.caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT2701_POWER_DOMAIN_DISP] = {
@@ -566,7 +625,10 @@ static void mtk_register_power_domains(struct platform_device *pdev,
.ctl_offs = SPM_DIS_PWR_CON,
.sram_pdn_bits = GENMASK(11, 8),
.basic_clk_name = {"mm"},
- .bus_prot_mask = MT2701_TOP_AXI_PROT_EN_MM_M0,
+ .bp_table = {
+ BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228,
+ MT2701_TOP_AXI_PROT_EN_MM_M0),
+ },
.caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT2701_POWER_DOMAIN_MFG] = {
@@ -701,7 +763,10 @@ static void mtk_register_power_domains(struct platform_device *pdev,
.sram_pdn_bits = GENMASK(8, 8),
.sram_pdn_ack_bits = GENMASK(16, 16),
.basic_clk_name = {"mfg"},
- .bus_prot_mask = BIT(14) | BIT(21) | BIT(23),
+ .bp_table = {
+ BUS_PROT(IFR_TYPE, 0x260, 0x264, 0x220, 0x228,
+ BIT(14) | BIT(21) | BIT(23)),
+ },
.caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT2712_POWER_DOMAIN_MFG_SC1] = {
@@ -773,7 +838,10 @@ static void mtk_register_power_domains(struct platform_device *pdev,
.sram_pdn_bits = GENMASK(8, 8),
.sram_pdn_ack_bits = GENMASK(12, 12),
.basic_clk_name = {"mm"},
- .bus_prot_mask = (BIT(1) | BIT(2)),
+ .bp_table = {
+ BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228,
+ BIT(1) | BIT(2)),
+ },
},
[MT6797_POWER_DOMAIN_AUDIO] = {
.name = "audio",
@@ -820,7 +888,10 @@ static void mtk_register_power_domains(struct platform_device *pdev,
.ctl_offs = SPM_ETHSYS_PWR_CON,
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(15, 12),
- .bus_prot_mask = MT7622_TOP_AXI_PROT_EN_ETHSYS,
+ .bp_table = {
+ BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228,
+ MT7622_TOP_AXI_PROT_EN_ETHSYS),
+ },
.caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT7622_POWER_DOMAIN_HIF0] = {
@@ -830,7 +901,10 @@ static void mtk_register_power_domains(struct platform_device *pdev,
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(15, 12),
.basic_clk_name = {"hif_sel"},
- .bus_prot_mask = MT7622_TOP_AXI_PROT_EN_HIF0,
+ .bp_table = {
+ BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228,
+ MT7622_TOP_AXI_PROT_EN_HIF0),
+ },
.caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT7622_POWER_DOMAIN_HIF1] = {
@@ -840,7 +914,10 @@ static void mtk_register_power_domains(struct platform_device *pdev,
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(15, 12),
.basic_clk_name = {"hif_sel"},
- .bus_prot_mask = MT7622_TOP_AXI_PROT_EN_HIF1,
+ .bp_table = {
+ BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228,
+ MT7622_TOP_AXI_PROT_EN_HIF1),
+ },
.caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT7622_POWER_DOMAIN_WB] = {
@@ -849,7 +926,10 @@ static void mtk_register_power_domains(struct platform_device *pdev,
.ctl_offs = SPM_WB_PWR_CON,
.sram_pdn_bits = 0,
.sram_pdn_ack_bits = 0,
- .bus_prot_mask = MT7622_TOP_AXI_PROT_EN_WB,
+ .bp_table = {
+ BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228,
+ MT7622_TOP_AXI_PROT_EN_WB),
+ },
.caps = MTK_SCPD_ACTIVE_WAKEUP | MTK_SCPD_FWAIT_SRAM,
},
};
@@ -863,8 +943,11 @@ static void mtk_register_power_domains(struct platform_device *pdev,
.name = "conn",
.sta_mask = PWR_STATUS_CONN,
.ctl_offs = SPM_CONN_PWR_CON,
- .bus_prot_mask = MT2701_TOP_AXI_PROT_EN_CONN_M |
- MT2701_TOP_AXI_PROT_EN_CONN_S,
+ .bp_table = {
+ BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228,
+ MT2701_TOP_AXI_PROT_EN_CONN_M |
+ MT2701_TOP_AXI_PROT_EN_CONN_S),
+ },
.caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT7623A_POWER_DOMAIN_ETH] = {
@@ -929,8 +1012,11 @@ static void mtk_register_power_domains(struct platform_device *pdev,
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(12, 12),
.basic_clk_name = {"mm"},
- .bus_prot_mask = MT8173_TOP_AXI_PROT_EN_MM_M0 |
- MT8173_TOP_AXI_PROT_EN_MM_M1,
+ .bp_table = {
+ BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228,
+ MT8173_TOP_AXI_PROT_EN_MM_M0 |
+ MT8173_TOP_AXI_PROT_EN_MM_M1),
+ },
},
[MT8173_POWER_DOMAIN_VENC_LT] = {
.name = "venc_lt",
@@ -976,10 +1062,13 @@ static void mtk_register_power_domains(struct platform_device *pdev,
.ctl_offs = SPM_MFG_PWR_CON,
.sram_pdn_bits = GENMASK(13, 8),
.sram_pdn_ack_bits = GENMASK(21, 16),
- .bus_prot_mask = MT8173_TOP_AXI_PROT_EN_MFG_S |
- MT8173_TOP_AXI_PROT_EN_MFG_M0 |
- MT8173_TOP_AXI_PROT_EN_MFG_M1 |
- MT8173_TOP_AXI_PROT_EN_MFG_SNOOP_OUT,
+ .bp_table = {
+ BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228,
+ MT8173_TOP_AXI_PROT_EN_MFG_S |
+ MT8173_TOP_AXI_PROT_EN_MFG_M0 |
+ MT8173_TOP_AXI_PROT_EN_MFG_M1 |
+ MT8173_TOP_AXI_PROT_EN_MFG_SNOOP_OUT),
+ },
},
};
@@ -995,7 +1084,6 @@ static void mtk_register_power_domains(struct platform_device *pdev,
.pwr_sta_offs = SPM_PWR_STATUS,
.pwr_sta2nd_offs = SPM_PWR_STATUS_2ND
},
- .bus_prot_reg_update = true,
};
static const struct scp_soc_data mt2712_data = {
@@ -1007,7 +1095,6 @@ static void mtk_register_power_domains(struct platform_device *pdev,
.pwr_sta_offs = SPM_PWR_STATUS,
.pwr_sta2nd_offs = SPM_PWR_STATUS_2ND
},
- .bus_prot_reg_update = false,
};
static const struct scp_soc_data mt6797_data = {
@@ -1019,7 +1106,6 @@ static void mtk_register_power_domains(struct platform_device *pdev,
.pwr_sta_offs = SPM_PWR_STATUS_MT6797,
.pwr_sta2nd_offs = SPM_PWR_STATUS_2ND_MT6797
},
- .bus_prot_reg_update = true,
};
static const struct scp_soc_data mt7622_data = {
@@ -1029,7 +1115,6 @@ static void mtk_register_power_domains(struct platform_device *pdev,
.pwr_sta_offs = SPM_PWR_STATUS,
.pwr_sta2nd_offs = SPM_PWR_STATUS_2ND
},
- .bus_prot_reg_update = true,
};
static const struct scp_soc_data mt7623a_data = {
@@ -1039,7 +1124,6 @@ static void mtk_register_power_domains(struct platform_device *pdev,
.pwr_sta_offs = SPM_PWR_STATUS,
.pwr_sta2nd_offs = SPM_PWR_STATUS_2ND
},
- .bus_prot_reg_update = true,
};
static const struct scp_soc_data mt8173_data = {
@@ -1051,7 +1135,6 @@ static void mtk_register_power_domains(struct platform_device *pdev,
.pwr_sta_offs = SPM_PWR_STATUS,
.pwr_sta2nd_offs = SPM_PWR_STATUS_2ND
},
- .bus_prot_reg_update = true,
};
/*
@@ -1092,8 +1175,7 @@ static int scpsys_probe(struct platform_device *pdev)
soc = of_device_get_match_data(&pdev->dev);
- scp = init_scp(pdev, soc->domains, soc->num_domains, &soc->regs,
- soc->bus_prot_reg_update);
+ scp = init_scp(pdev, soc->domains, soc->num_domains, &soc->regs);
if (IS_ERR(scp))
return PTR_ERR(scp);
diff --git a/drivers/soc/mediatek/scpsys.h b/drivers/soc/mediatek/scpsys.h
index ad2559b..45bc644 100644
--- a/drivers/soc/mediatek/scpsys.h
+++ b/drivers/soc/mediatek/scpsys.h
@@ -2,10 +2,28 @@
#ifndef __SOC_MEDIATEK_SCPSYS_H
#define __SOC_MEDIATEK_SCPSYS_H
-#define INFRA_TOPAXI_PROTECTEN 0x0220
-#define INFRA_TOPAXI_PROTECTSTA1 0x0228
-#define INFRA_TOPAXI_PROTECTEN_SET 0x0260
-#define INFRA_TOPAXI_PROTECTEN_CLR 0x0264
+#define MAX_STEPS 4
+
+#define _BUS_PROT(_type, _set_ofs, _clr_ofs, \
+ _en_ofs, _sta_ofs, _mask, _ignore_clr_ack) { \
+ .type = _type, \
+ .set_ofs = _set_ofs, \
+ .clr_ofs = _clr_ofs, \
+ .en_ofs = _en_ofs, \
+ .sta_ofs = _sta_ofs, \
+ .mask = _mask, \
+ .ignore_clr_ack = _ignore_clr_ack, \
+ }
+
+#define BUS_PROT(_type, _set_ofs, _clr_ofs, \
+ _en_ofs, _sta_ofs, _mask) \
+ _BUS_PROT(_type, _set_ofs, _clr_ofs, \
+ _en_ofs, _sta_ofs, _mask, false)
+
+#define BUS_PROT_IGN(_type, _set_ofs, _clr_ofs, \
+ _en_ofs, _sta_ofs, _mask) \
+ _BUS_PROT(_type, _set_ofs, _clr_ofs, \
+ _en_ofs, _sta_ofs, _mask, true)
#define MT2701_TOP_AXI_PROT_EN_MM_M0 BIT(1)
#define MT2701_TOP_AXI_PROT_EN_CONN_M BIT(2)
@@ -25,4 +43,20 @@
#define MT8173_TOP_AXI_PROT_EN_MFG_M1 BIT(22)
#define MT8173_TOP_AXI_PROT_EN_MFG_SNOOP_OUT BIT(23)
+enum regmap_type {
+ INVALID_TYPE = 0,
+ IFR_TYPE,
+ SMI_TYPE,
+};
+
+struct bus_prot {
+ enum regmap_type type;
+ u32 set_ofs;
+ u32 clr_ofs;
+ u32 en_ofs;
+ u32 sta_ofs;
+ u32 mask;
+ bool ignore_clr_ack;
+};
+
#endif /* __SOC_MEDIATEK_SCPSYS_H */
--
1.8.1.1.dirty
Powered by blists - more mailing lists