[PATCH 2/2] EDAC/qcom: Get rid of hardcoded register offsets

From: Manivannan Sadhasivam
Date: Thu Aug 11 2022 - 06:10:13 EST

The LLCC EDAC register offsets varies between each SoC. Hardcoding the
register offsets won't work and will often result in crash due to
accessing the wrong locations.

Hence, get the register offsets from the LLCC driver matching the
individual SoCs.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
---
drivers/edac/qcom_edac.c | 112 ++++++++++++++---------------
include/linux/soc/qcom/llcc-qcom.h | 35 +++++++--
2 files changed, 83 insertions(+), 64 deletions(-)

diff --git a/drivers/edac/qcom_edac.c b/drivers/edac/qcom_edac.c
index 97a27e42dd61..500360cc5258 100644
--- a/drivers/edac/qcom_edac.c
+++ b/drivers/edac/qcom_edac.c
@@ -21,30 +21,9 @@
#define TRP_SYN_REG_CNT 6
#define DRP_SYN_REG_CNT 8

-#define LLCC_COMMON_STATUS0 0x0003000c
#define LLCC_LB_CNT_MASK GENMASK(31, 28)
#define LLCC_LB_CNT_SHIFT 28

-/* Single & double bit syndrome register offsets */
-#define TRP_ECC_SB_ERR_SYN0 0x0002304c
-#define TRP_ECC_DB_ERR_SYN0 0x00020370
-#define DRP_ECC_SB_ERR_SYN0 0x0004204c
-#define DRP_ECC_DB_ERR_SYN0 0x00042070
-
-/* Error register offsets */
-#define TRP_ECC_ERROR_STATUS1 0x00020348
-#define TRP_ECC_ERROR_STATUS0 0x00020344
-#define DRP_ECC_ERROR_STATUS1 0x00042048
-#define DRP_ECC_ERROR_STATUS0 0x00042044
-
-/* TRP, DRP interrupt register offsets */
-#define DRP_INTERRUPT_STATUS 0x00041000
-#define TRP_INTERRUPT_0_STATUS 0x00020480
-#define DRP_INTERRUPT_CLEAR 0x00041008
-#define DRP_ECC_ERROR_CNTR_CLEAR 0x00040004
-#define TRP_INTERRUPT_0_CLEAR 0x00020484
-#define TRP_ECC_ERROR_CNTR_CLEAR 0x00020440
-
/* Mask and shift macros */
#define ECC_DB_ERR_COUNT_MASK GENMASK(4, 0)
#define ECC_DB_ERR_WAYS_MASK GENMASK(31, 16)
@@ -60,15 +39,6 @@
#define DRP_TRP_INT_CLEAR GENMASK(1, 0)
#define DRP_TRP_CNT_CLEAR GENMASK(1, 0)

-/* Config registers offsets*/
-#define DRP_ECC_ERROR_CFG 0x00040000
-
-/* Tag RAM, Data RAM interrupt register offsets */
-#define CMN_INTERRUPT_0_ENABLE 0x0003001c
-#define CMN_INTERRUPT_2_ENABLE 0x0003003c
-#define TRP_INTERRUPT_0_ENABLE 0x00020488
-#define DRP_INTERRUPT_ENABLE 0x0004100c
-
#define SB_ERROR_THRESHOLD 0x1
#define SB_ERROR_THRESHOLD_SHIFT 24
#define SB_DB_TRP_INTERRUPT_ENABLE 0x3
@@ -86,9 +56,6 @@ enum {
static const struct llcc_edac_reg_data edac_reg_data[] = {
[LLCC_DRAM_CE] = {
.name = "DRAM Single-bit",
- .synd_reg = DRP_ECC_SB_ERR_SYN0,
- .count_status_reg = DRP_ECC_ERROR_STATUS1,
- .ways_status_reg = DRP_ECC_ERROR_STATUS0,
.reg_cnt = DRP_SYN_REG_CNT,
.count_mask = ECC_SB_ERR_COUNT_MASK,
.ways_mask = ECC_SB_ERR_WAYS_MASK,
@@ -96,9 +63,6 @@ static const struct llcc_edac_reg_data edac_reg_data[] = {
},
[LLCC_DRAM_UE] = {
.name = "DRAM Double-bit",
- .synd_reg = DRP_ECC_DB_ERR_SYN0,
- .count_status_reg = DRP_ECC_ERROR_STATUS1,
- .ways_status_reg = DRP_ECC_ERROR_STATUS0,
.reg_cnt = DRP_SYN_REG_CNT,
.count_mask = ECC_DB_ERR_COUNT_MASK,
.ways_mask = ECC_DB_ERR_WAYS_MASK,
@@ -106,9 +70,6 @@ static const struct llcc_edac_reg_data edac_reg_data[] = {
},
[LLCC_TRAM_CE] = {
.name = "TRAM Single-bit",
- .synd_reg = TRP_ECC_SB_ERR_SYN0,
- .count_status_reg = TRP_ECC_ERROR_STATUS1,
- .ways_status_reg = TRP_ECC_ERROR_STATUS0,
.reg_cnt = TRP_SYN_REG_CNT,
.count_mask = ECC_SB_ERR_COUNT_MASK,
.ways_mask = ECC_SB_ERR_WAYS_MASK,
@@ -116,9 +77,6 @@ static const struct llcc_edac_reg_data edac_reg_data[] = {
},
[LLCC_TRAM_UE] = {
.name = "TRAM Double-bit",
- .synd_reg = TRP_ECC_DB_ERR_SYN0,
- .count_status_reg = TRP_ECC_ERROR_STATUS1,
- .ways_status_reg = TRP_ECC_ERROR_STATUS0,
.reg_cnt = TRP_SYN_REG_CNT,
.count_mask = ECC_DB_ERR_COUNT_MASK,
.ways_mask = ECC_DB_ERR_WAYS_MASK,
@@ -126,7 +84,7 @@ static const struct llcc_edac_reg_data edac_reg_data[] = {
},
};

-static int qcom_llcc_core_setup(struct regmap *llcc_bcast_regmap)
+static int qcom_llcc_core_setup(struct llcc_drv_data *drv, struct regmap *llcc_bcast_regmap)
{
u32 sb_err_threshold;
int ret;
@@ -135,31 +93,31 @@ static int qcom_llcc_core_setup(struct regmap *llcc_bcast_regmap)
* Configure interrupt enable registers such that Tag, Data RAM related
* interrupts are propagated to interrupt controller for servicing
*/
- ret = regmap_update_bits(llcc_bcast_regmap, CMN_INTERRUPT_2_ENABLE,
+ ret = regmap_update_bits(llcc_bcast_regmap, drv->edac_reg->cmn_interrupt_2_enable,
TRP0_INTERRUPT_ENABLE,
TRP0_INTERRUPT_ENABLE);
if (ret)
return ret;

- ret = regmap_update_bits(llcc_bcast_regmap, TRP_INTERRUPT_0_ENABLE,
+ ret = regmap_update_bits(llcc_bcast_regmap, drv->edac_reg->trp_interrupt_0_enable,
SB_DB_TRP_INTERRUPT_ENABLE,
SB_DB_TRP_INTERRUPT_ENABLE);
if (ret)
return ret;

sb_err_threshold = (SB_ERROR_THRESHOLD << SB_ERROR_THRESHOLD_SHIFT);
- ret = regmap_write(llcc_bcast_regmap, DRP_ECC_ERROR_CFG,
+ ret = regmap_write(llcc_bcast_regmap, drv->edac_reg->drp_ecc_error_cfg,
sb_err_threshold);
if (ret)
return ret;

- ret = regmap_update_bits(llcc_bcast_regmap, CMN_INTERRUPT_2_ENABLE,
+ ret = regmap_update_bits(llcc_bcast_regmap, drv->edac_reg->cmn_interrupt_2_enable,
DRP0_INTERRUPT_ENABLE,
DRP0_INTERRUPT_ENABLE);
if (ret)
return ret;

- ret = regmap_write(llcc_bcast_regmap, DRP_INTERRUPT_ENABLE,
+ ret = regmap_write(llcc_bcast_regmap, drv->edac_reg->drp_interrupt_enable,
SB_DB_DRP_INTERRUPT_ENABLE);
return ret;
}
@@ -173,24 +131,24 @@ qcom_llcc_clear_error_status(int err_type, struct llcc_drv_data *drv)
switch (err_type) {
case LLCC_DRAM_CE:
case LLCC_DRAM_UE:
- ret = regmap_write(drv->bcast_regmap, DRP_INTERRUPT_CLEAR,
+ ret = regmap_write(drv->bcast_regmap, drv->edac_reg->drp_interrupt_clear,
DRP_TRP_INT_CLEAR);
if (ret)
return ret;

- ret = regmap_write(drv->bcast_regmap, DRP_ECC_ERROR_CNTR_CLEAR,
+ ret = regmap_write(drv->bcast_regmap, drv->edac_reg->drp_ecc_error_cntr_clear,
DRP_TRP_CNT_CLEAR);
if (ret)
return ret;
break;
case LLCC_TRAM_CE:
case LLCC_TRAM_UE:
- ret = regmap_write(drv->bcast_regmap, TRP_INTERRUPT_0_CLEAR,
+ ret = regmap_write(drv->bcast_regmap, drv->edac_reg->trp_interrupt_0_clear,
DRP_TRP_INT_CLEAR);
if (ret)
return ret;

- ret = regmap_write(drv->bcast_regmap, TRP_ECC_ERROR_CNTR_CLEAR,
+ ret = regmap_write(drv->bcast_regmap, drv->edac_reg->trp_ecc_error_cntr_clear,
DRP_TRP_CNT_CLEAR);
if (ret)
return ret;
@@ -203,16 +161,54 @@ qcom_llcc_clear_error_status(int err_type, struct llcc_drv_data *drv)
return ret;
}

+struct qcom_llcc_syn_regs {
+ u32 synd_reg;
+ u32 count_status_reg;
+ u32 ways_status_reg;
+};
+
+static void get_reg_offsets(struct llcc_drv_data *drv, int err_type,
+ struct qcom_llcc_syn_regs *syn_regs)
+{
+ const struct llcc_edac_reg *edac_reg = drv->edac_reg;
+
+ switch (err_type) {
+ case LLCC_DRAM_CE:
+ syn_regs->synd_reg = edac_reg->drp_ecc_sb_err_syn0;
+ syn_regs->count_status_reg = edac_reg->drp_ecc_error_status1;
+ syn_regs->ways_status_reg = edac_reg->drp_ecc_error_status0;
+ break;
+ case LLCC_DRAM_UE:
+ syn_regs->synd_reg = edac_reg->drp_ecc_db_err_syn0;
+ syn_regs->count_status_reg = edac_reg->drp_ecc_error_status1;
+ syn_regs->ways_status_reg = edac_reg->drp_ecc_error_status0;
+ break;
+ case LLCC_TRAM_CE:
+ syn_regs->synd_reg = edac_reg->trp_ecc_sb_err_syn0;
+ syn_regs->count_status_reg = edac_reg->trp_ecc_error_status1;
+ syn_regs->ways_status_reg = edac_reg->trp_ecc_error_status0;
+ break;
+ case LLCC_TRAM_UE:
+ syn_regs->synd_reg = edac_reg->trp_ecc_db_err_syn0;
+ syn_regs->count_status_reg = edac_reg->trp_ecc_error_status1;
+ syn_regs->ways_status_reg = edac_reg->trp_ecc_error_status0;
+ break;
+ }
+}
+
/* Dump Syndrome registers data for Tag RAM, Data RAM bit errors*/
static int
dump_syn_reg_values(struct llcc_drv_data *drv, u32 bank, int err_type)
{
struct llcc_edac_reg_data reg_data = edac_reg_data[err_type];
+ struct qcom_llcc_syn_regs regs = { };
int err_cnt, err_ways, ret, i;
u32 synd_reg, synd_val;

+ get_reg_offsets(drv, err_type, &regs);
+
for (i = 0; i < reg_data.reg_cnt; i++) {
- synd_reg = reg_data.synd_reg + (i * 4);
+ synd_reg = regs.synd_reg + (i * 4);
ret = regmap_read(drv->regmap, drv->offsets[bank] + synd_reg,
&synd_val);
if (ret)
@@ -223,7 +219,7 @@ dump_syn_reg_values(struct llcc_drv_data *drv, u32 bank, int err_type)
}

ret = regmap_read(drv->regmap,
- drv->offsets[bank] + reg_data.count_status_reg,
+ drv->offsets[bank] + regs.count_status_reg,
&err_cnt);
if (ret)
goto clear;
@@ -234,7 +230,7 @@ dump_syn_reg_values(struct llcc_drv_data *drv, u32 bank, int err_type)
reg_data.name, err_cnt);

ret = regmap_read(drv->regmap,
- drv->offsets[bank] + reg_data.ways_status_reg,
+ drv->offsets[bank] + regs.ways_status_reg,
&err_ways);
if (ret)
goto clear;
@@ -297,7 +293,7 @@ llcc_ecc_irq_handler(int irq, void *edev_ctl)
/* Iterate over the banks and look for Tag RAM or Data RAM errors */
for (i = 0; i < drv->num_banks; i++) {
ret = regmap_read(drv->regmap,
- drv->offsets[i] + DRP_INTERRUPT_STATUS,
+ drv->offsets[i] + drv->edac_reg->drp_interrupt_status,
&drp_error);

if (!ret && (drp_error & SB_ECC_ERROR)) {
@@ -313,7 +309,7 @@ llcc_ecc_irq_handler(int irq, void *edev_ctl)
irq_rc = IRQ_HANDLED;

ret = regmap_read(drv->regmap,
- drv->offsets[i] + TRP_INTERRUPT_0_STATUS,
+ drv->offsets[i] + drv->edac_reg->trp_interrupt_0_status,
&trp_error);

if (!ret && (trp_error & SB_ECC_ERROR)) {
@@ -340,7 +336,7 @@ static int qcom_llcc_edac_probe(struct platform_device *pdev)
int ecc_irq;
int rc;

- rc = qcom_llcc_core_setup(llcc_driv_data->bcast_regmap);
+ rc = qcom_llcc_core_setup(llcc_driv_data, llcc_driv_data->bcast_regmap);
if (rc)
return rc;

diff --git a/include/linux/soc/qcom/llcc-qcom.h b/include/linux/soc/qcom/llcc-qcom.h
index 0bc21ee58fac..a36ed7ffcb28 100644
--- a/include/linux/soc/qcom/llcc-qcom.h
+++ b/include/linux/soc/qcom/llcc-qcom.h
@@ -55,9 +55,6 @@ struct llcc_slice_desc {
/**
* struct llcc_edac_reg_data - llcc edac registers data for each error type
* @name: Name of the error
- * @synd_reg: Syndrome register address
- * @count_status_reg: Status register address to read the error count
- * @ways_status_reg: Status register address to read the error ways
* @reg_cnt: Number of registers
* @count_mask: Mask value to get the error count
* @ways_mask: Mask value to get the error ways
@@ -66,9 +63,6 @@ struct llcc_slice_desc {
*/
struct llcc_edac_reg_data {
char *name;
- u64 synd_reg;
- u64 count_status_reg;
- u64 ways_status_reg;
u32 reg_cnt;
u32 count_mask;
u32 ways_mask;
@@ -76,6 +70,34 @@ struct llcc_edac_reg_data {
u8 ways_shift;
};

+struct llcc_edac_reg {
+ /* LLCC TRP registers */
+ u32 trp_ecc_error_status0;
+ u32 trp_ecc_error_status1;
+ u32 trp_ecc_sb_err_syn0;
+ u32 trp_ecc_db_err_syn0;
+ u32 trp_ecc_error_cntr_clear;
+ u32 trp_interrupt_0_status;
+ u32 trp_interrupt_0_clear;
+ u32 trp_interrupt_0_enable;
+
+ /* LLCC Common registers */
+ u32 cmn_status0;
+ u32 cmn_interrupt_0_enable;
+ u32 cmn_interrupt_2_enable;
+
+ /* LLCC DRP registers */
+ u32 drp_ecc_error_cfg;
+ u32 drp_ecc_error_cntr_clear;
+ u32 drp_interrupt_status;
+ u32 drp_interrupt_clear;
+ u32 drp_interrupt_enable;
+ u32 drp_ecc_error_status0;
+ u32 drp_ecc_error_status1;
+ u32 drp_ecc_sb_err_syn0;
+ u32 drp_ecc_db_err_syn0;
+};
+
/**
* struct llcc_drv_data - Data associated with the llcc driver
* @regmap: regmap associated with the llcc device
@@ -94,6 +116,7 @@ struct llcc_drv_data {
struct regmap *regmap;
struct regmap *bcast_regmap;
const struct llcc_slice_config *cfg;
+ const struct llcc_edac_reg *edac_reg;
struct mutex lock;
u32 cfg_size;
u32 max_slices;
--
2.25.1