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Subject[PATCH 2/2] drivers: edac: Add EDAC support for Kryo CPU caches
Date
Kryo{3,4}XX CPU cores implement RAS extensions to support
Error Correcting Code(ECC). Currently all Kryo{3,4}XX CPU
cores (gold/silver a.k.a big/LITTLE) support ECC via RAS.
This adds an interrupt based driver for those CPUs and
provides an optional polling of error recording system
registers.

Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
---
MAINTAINERS | 7 +
drivers/edac/Kconfig | 20 +
drivers/edac/Makefile | 1 +
drivers/edac/qcom_kryo_edac.c | 679 ++++++++++++++++++++++++++++++++++
4 files changed, 707 insertions(+)
create mode 100644 drivers/edac/qcom_kryo_edac.c

diff --git a/MAINTAINERS b/MAINTAINERS
index c2d80079dccc..f58c93f963f6 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6049,6 +6049,13 @@ L: linux-edac@vger.kernel.org
S: Maintained
F: drivers/edac/qcom_edac.c

+EDAC-KRYO-QCOM
+M: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
+L: linux-arm-msm@vger.kernel.org
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/qcom_kryo_edac.c
+
EDIROL UA-101/UA-1000 DRIVER
M: Clemens Ladisch <clemens@ladisch.de>
L: alsa-devel@alsa-project.org (moderated for non-subscribers)
diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
index 417dad635526..cd78ac2917c9 100644
--- a/drivers/edac/Kconfig
+++ b/drivers/edac/Kconfig
@@ -508,6 +508,26 @@ config EDAC_QCOM
For debugging issues having to do with stability and overall system
health, you should probably say 'Y' here.

+config EDAC_QCOM_KRYO
+ tristate "QCOM Kryo EDAC for CPU L1/L2/L3-SCU caches"
+ depends on ARCH_QCOM && ARM64_RAS_EXTN
+ help
+ Support for Error detection and correction on Kryo Gold and Silver CPU
+ cores with RAS extensions. Currently it detects and reports all Single
+ Bit Errors (SBEs) and Double Bit Errors (DBEs).
+
+ For debugging issues having to do with stability and overall system
+ health, you should probably say 'Y' here.
+
+config EDAC_QCOM_KRYO_POLL
+ depends on EDAC_QCOM_KRYO
+ bool "Poll on Kryo ECC registers"
+ help
+ This option chooses whether or not you want to poll on the Kryo ECC
+ registers. When this is enabled, the polling rate can be set as a
+ module parameter. By default, it will call the polling function every
+ second.
+
config EDAC_ASPEED
tristate "Aspeed AST 2500 SoC"
depends on MACH_ASPEED_G5
diff --git a/drivers/edac/Makefile b/drivers/edac/Makefile
index d77200c9680b..29edcfa6ec0e 100644
--- a/drivers/edac/Makefile
+++ b/drivers/edac/Makefile
@@ -85,5 +85,6 @@ obj-$(CONFIG_EDAC_SYNOPSYS) += synopsys_edac.o
obj-$(CONFIG_EDAC_XGENE) += xgene_edac.o
obj-$(CONFIG_EDAC_TI) += ti_edac.o
obj-$(CONFIG_EDAC_QCOM) += qcom_edac.o
+obj-$(CONFIG_EDAC_QCOM_KRYO) += qcom_kryo_edac.o
obj-$(CONFIG_EDAC_ASPEED) += aspeed_edac.o
obj-$(CONFIG_EDAC_BLUEFIELD) += bluefield_edac.o
diff --git a/drivers/edac/qcom_kryo_edac.c b/drivers/edac/qcom_kryo_edac.c
new file mode 100644
index 000000000000..05b60ad3cb0e
--- /dev/null
+++ b/drivers/edac/qcom_kryo_edac.c
@@ -0,0 +1,679 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2019, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/cpu_pm.h>
+#include <linux/of_irq.h>
+#include <linux/smp.h>
+
+#include <asm/cputype.h>
+#include <asm/sysreg.h>
+
+#include "edac_device.h"
+#include "edac_mc.h"
+
+#define DRV_NAME "qcom_kryo_edac"
+
+/*
+ * ARM Cortex-A55, Cortex-A75, Cortex-A76 TRM Chapter B3.3
+ * ARM DSU TRM Chapter B2.3
+ * CFI = Corrected Fault Handling interrupt, FI = Fault handling interrupt
+ * UI = Uncorrected error recovery interrupt, ED = Error Detection
+ */
+#define KRYO_ERRXCTLR_ED BIT(0)
+#define KRYO_ERRXCTLR_UI BIT(2)
+#define KRYO_ERRXCTLR_FI BIT(3)
+#define KRYO_ERRXCTLR_CFI BIT(8)
+#define KRYO_ERRXCTLR_ENABLE (KRYO_ERRXCTLR_CFI | KRYO_ERRXCTLR_FI | \
+ KRYO_ERRXCTLR_UI | KRYO_ERRXCTLR_ED)
+
+/*
+ * ARM Cortex-A55, Cortex-A75, Cortex-A76 TRM Chapter B3.4
+ * ARM DSU TRM Chapter B2.4
+ */
+#define KRYO_ERRXFR_ED GENMASK(1, 0)
+#define KRYO_ERRXFR_DE GENMASK(3, 2)
+#define KRYO_ERRXFR_UI GENMASK(5, 4)
+#define KRYO_ERRXFR_FI GENMASK(7, 6)
+#define KRYO_ERRXFR_UE GENMASK(9, 8)
+#define KRYO_ERRXFR_CFI GENMASK(11, 10)
+#define KRYO_ERRXFR_CEC GENMASK(14, 12)
+#define KRYO_ERRXFR_RP BIT(15)
+#define KRYO_ERRXFR_SUPPORTED (KRYO_ERRXFR_ED | KRYO_ERRXFR_DE | \
+ KRYO_ERRXFR_UI | KRYO_ERRXFR_FI | \
+ KRYO_ERRXFR_UE | KRYO_ERRXFR_CFI | \
+ KRYO_ERRXFR_CEC | KRYO_ERRXFR_RP)
+
+/*
+ * ARM Cortex-A55, Cortex-A75, Cortex-A76 TRM Chapter B3.5
+ * ARM DSU TRM Chapter B2.5
+ */
+#define KRYO_ERRXMISC0_CECR GENMASK_ULL(38, 32)
+#define KRYO_ERRXMISC0_CECO GENMASK_ULL(46, 40)
+
+/* ARM Cortex-A76 TRM Chapter B3.5 */
+#define KRYO_ERRXMISC0_UNIT GENMASK(3, 0)
+#define KRYO_ERRXMISC0_LVL GENMASK(3, 1)
+
+/* ARM Cortex-A76 TRM Chapter B3.10 has SERR bitfields 4:0
+ * but Cortex-A55, Cortex-A75 and DSU TRM has SERR bitfields 7:0.
+ * Since max error record is 21, we can use bitfields 4:0 for
+ * Kryo{3,4}XX CPUs.
+ */
+#define KRYO_ERRXSTATUS_SERR GENMASK(4, 0)
+#define KRYO_ERRXSTATUS_DE BIT(23)
+#define KRYO_ERRXSTATUS_CE GENMASK(25, 24)
+#define KRYO_ERRXSTATUS_MV BIT(26)
+#define KRYO_ERRXSTATUS_UE BIT(29)
+#define KRYO_ERRXSTATUS_VALID BIT(30)
+
+/* ARM Cortex-A76 TRM Chapter B3.5
+ * IC = Instruction Cache, DC = Data Cache
+ */
+#define KRYO_L1_UNIT_IC 0x1
+#define KRYO_L2_UNIT_TLB 0x2
+#define KRYO_L1_UNIT_DC 0x4
+#define KRYO_L2_UNIT 0x8
+
+/*
+ * ARM Cortex-A55 TRM Chapter B2.36
+ * ARM Cortex-A75, Cortex-A76 TRM Chapter B2.37
+ */
+#define KRYO_ERR_RECORD_L1_L2 0x0
+#define KRYO_ERR_RECORD_L3 0x1
+
+/* ARM DSU TRM Chapter B2.10 */
+#define BUS_ERROR 0x12
+
+/* QCOM Kryo CPU part numbers */
+#define KRYO3XX_GOLD 0x802
+#define KRYO4XX_GOLD 0x804
+#define KRYO4XX_SILVER_V1 0x803
+#define KRYO4XX_SILVER_V2 0x805
+
+#define KRYO_EDAC_MSG_MAX 256
+
+static int poll_msec = 1000;
+module_param(poll_msec, int, 0444);
+
+enum {
+ KRYO_L1 = 0,
+ KRYO_L2,
+ KRYO_L3,
+};
+
+/* CE = Corrected Error, UE = Uncorrected Error, DE = Deferred Error */
+enum {
+ KRYO_L1_CE = 0,
+ KRYO_L1_UE,
+ KRYO_L1_DE,
+ KRYO_L2_CE,
+ KRYO_L2_UE,
+ KRYO_L2_DE,
+ KRYO_L3_CE,
+ KRYO_L3_UE,
+ KRYO_L3_DE,
+};
+
+struct error_record {
+ u32 error_code;
+ const char *error_msg;
+};
+
+struct error_type {
+ void (*fn)(struct edac_device_ctl_info *edev_ctl,
+ int inst_nr, int block_nr, const char *msg);
+ const char *msg;
+};
+
+/*
+ * ARM Cortex-A55, Cortex-A75, Cortex-A76 TRM Chapter B3.10
+ * ARM DSU TRM Chapter B2.10
+ */
+static const struct error_record serror_record[] = {
+ { 0x1, "Errors due to fault injection" },
+ { 0x2, "ECC error from internal data buffer" },
+ { 0x6, "ECC error on cache data RAM" },
+ { 0x7, "ECC error on cache tag or dirty RAM" },
+ { 0x8, "Parity error on TLB data RAM" },
+ { 0x9, "Parity error on TLB tag RAM" },
+ { 0x12, "Error response for a cache copyback" },
+ { 0x15, "Deferred error not supported" },
+};
+
+static const struct error_type err_type[] = {
+ { edac_device_handle_ce, "Kryo L1 Corrected Error" },
+ { edac_device_handle_ue, "Kryo L1 Uncorrected Error" },
+ { edac_device_handle_ue, "Kryo L1 Deferred Error" },
+ { edac_device_handle_ce, "Kryo L2 Corrected Error" },
+ { edac_device_handle_ue, "Kryo L2 Uncorrected Error" },
+ { edac_device_handle_ue, "Kryo L2 Deferred Error" },
+ { edac_device_handle_ce, "L3 Corrected Error" },
+ { edac_device_handle_ue, "L3 Uncorrected Error" },
+ { edac_device_handle_ue, "L3 Deferred Error" },
+};
+
+static struct edac_device_ctl_info __percpu *edac_dev;
+static struct edac_device_ctl_info *drv_edev_ctl;
+
+static const char *get_error_msg(u64 errxstatus)
+{
+ const struct error_record *rec;
+ u32 errxstatus_serr;
+
+ errxstatus_serr = FIELD_GET(KRYO_ERRXSTATUS_SERR, errxstatus);
+
+ for (rec = serror_record; rec->error_code; rec++) {
+ if (errxstatus_serr == rec->error_code)
+ return rec->error_msg;
+ }
+
+ return NULL;
+}
+
+static void dump_syndrome_reg(int error_type, int level,
+ u64 errxstatus, u64 errxmisc,
+ struct edac_device_ctl_info *edev_ctl)
+{
+ char msg[KRYO_EDAC_MSG_MAX];
+ const char *error_msg;
+ int cpu;
+
+ cpu = raw_smp_processor_id();
+
+ error_msg = get_error_msg(errxstatus);
+ if (!error_msg)
+ return;
+
+ snprintf(msg, KRYO_EDAC_MSG_MAX,
+ "CPU%d: %s, ERRXSTATUS_EL1:%#llx ERRXMISC0_EL1:%#llx, %s",
+ cpu, err_type[error_type].msg, errxstatus, errxmisc,
+ error_msg);
+
+ err_type[error_type].fn(edev_ctl, 0, level, msg);
+}
+
+static void kryo_check_err_type(u64 errxstatus, u64 errxmisc,
+ struct edac_device_ctl_info *edev_ctl,
+ int level)
+{
+ u32 errxstatus_ue, errxstatus_ce, errxstatus_de;
+
+ errxstatus_ce = FIELD_GET(KRYO_ERRXSTATUS_CE, errxstatus);
+ errxstatus_ue = FIELD_GET(KRYO_ERRXSTATUS_UE, errxstatus);
+ errxstatus_de = FIELD_GET(KRYO_ERRXSTATUS_DE, errxstatus);
+
+ switch (level) {
+ case KRYO_L1:
+ if (errxstatus_ce)
+ dump_syndrome_reg(KRYO_L1_CE, level, errxstatus,
+ errxmisc, edev_ctl);
+ else if (errxstatus_ue)
+ dump_syndrome_reg(KRYO_L1_UE, level, errxstatus,
+ errxmisc, edev_ctl);
+ else if (errxstatus_de)
+ dump_syndrome_reg(KRYO_L1_DE, level, errxstatus,
+ errxmisc, edev_ctl);
+ else
+ edac_printk(KERN_ERR, DRV_NAME, "Unknown error\n");
+ break;
+ case KRYO_L2:
+ if (errxstatus_ce)
+ dump_syndrome_reg(KRYO_L2_CE, level, errxstatus,
+ errxmisc, edev_ctl);
+ else if (errxstatus_ue)
+ dump_syndrome_reg(KRYO_L2_UE, level, errxstatus,
+ errxmisc, edev_ctl);
+ else if (errxstatus_de)
+ dump_syndrome_reg(KRYO_L2_DE, level, errxstatus,
+ errxmisc, edev_ctl);
+ else
+ edac_printk(KERN_ERR, DRV_NAME, "Unknown error\n");
+ break;
+ case KRYO_L3:
+ if (errxstatus_ce)
+ dump_syndrome_reg(KRYO_L3_CE, level, errxstatus,
+ errxmisc, edev_ctl);
+ else if (errxstatus_ue)
+ dump_syndrome_reg(KRYO_L3_UE, level, errxstatus,
+ errxmisc, edev_ctl);
+ else if (errxstatus_de)
+ dump_syndrome_reg(KRYO_L3_DE, level, errxstatus,
+ errxmisc, edev_ctl);
+ else
+ edac_printk(KERN_ERR, DRV_NAME, "Unknown error\n");
+ break;
+ default:
+ edac_printk(KERN_ERR, DRV_NAME, "Unknown level\n");
+ }
+}
+
+static inline void kryo_clear_error(u64 errxstatus)
+{
+ write_sysreg_s(errxstatus, SYS_ERXSTATUS_EL1);
+ isb();
+}
+
+static void kryo_parse_l1_l2_cache_error(u64 errxstatus, u64 errxmisc,
+ struct edac_device_ctl_info *edev_ctl,
+ int cpu)
+{
+ u32 part_num = read_cpuid_part_number();
+
+ switch (part_num) {
+ /* Kryo3XX gold CPU cores do not have a UNIT bitfield */
+ case KRYO3XX_GOLD:
+ case KRYO4XX_SILVER_V1:
+ case KRYO4XX_SILVER_V2:
+ switch (FIELD_GET(KRYO_ERRXMISC0_LVL, errxmisc)) {
+ case KRYO_L1:
+ kryo_check_err_type(errxstatus, errxmisc,
+ edev_ctl, KRYO_L1);
+ break;
+ case KRYO_L2:
+ kryo_check_err_type(errxstatus, errxmisc,
+ edev_ctl, KRYO_L2);
+ break;
+ default:
+ edac_printk(KERN_ERR, DRV_NAME,
+ "silver cpu:%d unknown error: %lu\n", cpu,
+ FIELD_GET(KRYO_ERRXMISC0_LVL, errxmisc));
+ }
+ break;
+ /* Kryo4XX gold CPU cores have a UNIT bitfield to identify levels */
+ case KRYO4XX_GOLD:
+ switch (FIELD_GET(KRYO_ERRXMISC0_UNIT, errxmisc)) {
+ case KRYO_L1_UNIT_DC:
+ case KRYO_L1_UNIT_IC:
+ kryo_check_err_type(errxstatus, errxmisc,
+ edev_ctl, KRYO_L1);
+ break;
+ case KRYO_L2_UNIT:
+ case KRYO_L2_UNIT_TLB:
+ kryo_check_err_type(errxstatus, errxmisc,
+ edev_ctl, KRYO_L2);
+ break;
+ default:
+ edac_printk(KERN_ERR, DRV_NAME,
+ "gold cpu:%d unknown error: %lu\n", cpu,
+ FIELD_GET(KRYO_ERRXMISC0_UNIT, errxmisc));
+ }
+ break;
+ default:
+ edac_printk(KERN_ERR, DRV_NAME,
+ "Error in matching cpu%d with part num:%u\n",
+ cpu, part_num);
+ }
+}
+
+static inline bool kryo_check_regs_valid(u64 errxstatus)
+{
+ /* Check if status and misc regs are valid */
+ if (!(FIELD_GET(KRYO_ERRXSTATUS_VALID, errxstatus)) ||
+ !(FIELD_GET(KRYO_ERRXSTATUS_MV, errxstatus)))
+ return false;
+
+ return true;
+}
+
+static void kryo_check_l1_l2_ecc(void *info)
+{
+ struct edac_device_ctl_info *edev_ctl = info;
+ u64 errxstatus;
+ u64 errxmisc;
+ int cpu;
+
+ cpu = smp_processor_id();
+ /* We know record 0 is L1 and L2 */
+ write_sysreg_s(0, SYS_ERRSELR_EL1);
+ isb();
+
+ errxstatus = read_sysreg_s(SYS_ERXSTATUS_EL1);
+ if (!kryo_check_regs_valid(errxstatus))
+ return;
+
+ errxmisc = read_sysreg_s(SYS_ERXMISC0_EL1);
+ /* Check if L1/L2 error */
+ if (!(FIELD_GET(KRYO_ERRXMISC0_LVL, errxmisc) == KRYO_L1) &&
+ !(FIELD_GET(KRYO_ERRXMISC0_LVL, errxmisc) == KRYO_L2))
+ return;
+
+ kryo_parse_l1_l2_cache_error(errxstatus, errxmisc, edev_ctl, cpu);
+ kryo_clear_error(errxstatus);
+}
+
+static irqreturn_t kryo_l1_l2_handler(int irq, void *drvdata)
+{
+ struct edac_device_ctl_info *edev_ctl = *(void **)drvdata;
+
+ kryo_check_l1_l2_ecc(edev_ctl);
+
+ return IRQ_HANDLED;
+}
+
+static bool kryo_check_l3_bus_error(u64 errxstatus)
+{
+ if (FIELD_GET(KRYO_ERRXSTATUS_SERR, errxstatus) == BUS_ERROR) {
+ edac_printk(KERN_ERR, DRV_NAME, "Bus Error\n");
+ return true;
+ }
+
+ return false;
+}
+
+static void kryo_check_l3_scu_ecc(struct edac_device_ctl_info *edev_ctl)
+{
+ u64 errxstatus, errxmisc;
+
+ /* We know record 1 is L3-SCU */
+ write_sysreg_s(1, SYS_ERRSELR_EL1);
+ isb();
+
+ errxstatus = read_sysreg_s(SYS_ERXSTATUS_EL1);
+ if (!kryo_check_regs_valid(errxstatus))
+ return;
+
+ errxmisc = read_sysreg_s(SYS_ERXMISC0_EL1);
+ /* Check if L3/bus error */
+ if (!(FIELD_GET(KRYO_ERRXMISC0_LVL, errxmisc) == KRYO_L3) ||
+ kryo_check_l3_bus_error(errxstatus))
+ return;
+
+ /* Check if Corrected/Uncorrected/Deferred error and dump regs */
+ kryo_check_err_type(errxstatus, errxmisc, edev_ctl, KRYO_L3);
+ kryo_clear_error(errxstatus);
+}
+
+static irqreturn_t kryo_l3_scu_handler(int irq, void *edev_ctl)
+{
+ kryo_check_l3_scu_ecc(edev_ctl);
+
+ return IRQ_HANDLED;
+}
+
+static void kryo_l1_l2_irq_disable(void *drvdata)
+{
+ int irq = *(int *)drvdata;
+
+ disable_percpu_irq(irq);
+}
+
+static void kryo_l1_l2_irq_enable(void *drvdata)
+{
+ int irq = *(int *)drvdata;
+
+ enable_percpu_irq(irq, IRQ_TYPE_LEVEL_HIGH);
+}
+
+static int kryo_l1_l2_setup_irq(struct platform_device *pdev,
+ struct edac_device_ctl_info *edev_ctl)
+{
+ int cpu, errirq, faultirq, ret;
+
+ edac_dev = devm_alloc_percpu(&pdev->dev, *edac_dev);
+ if (!edac_dev)
+ return -ENOMEM;
+
+ for_each_possible_cpu(cpu) {
+ preempt_disable();
+ per_cpu(edac_dev, cpu) = edev_ctl;
+ preempt_enable();
+ }
+
+ faultirq = platform_get_irq_byname(pdev, "l1-l2-faultirq");
+ if (faultirq < 0) {
+ ret = faultirq;
+ goto out_fault;
+ }
+
+ ret = request_percpu_irq(faultirq, kryo_l1_l2_handler,
+ "kryo_l1_l2_ecc_faultirq",
+ &edac_dev);
+ if (ret) {
+ edac_printk(KERN_DEBUG, DRV_NAME,
+ "Failed to request l1-l2-faultirq %d\n", faultirq);
+ goto out_fault;
+ }
+
+ on_each_cpu(kryo_l1_l2_irq_enable, &faultirq, 1);
+
+out_fault:
+ errirq = platform_get_irq_byname(pdev, "l1-l2-errirq");
+ if (errirq < 0) {
+ ret = errirq;
+ goto out_err;
+ }
+
+ ret = request_percpu_irq(errirq, kryo_l1_l2_handler,
+ "kryo_l1_l2_ecc_errirq",
+ &edac_dev);
+ if (ret) {
+ edac_printk(KERN_DEBUG, DRV_NAME,
+ "Failed to request l1-l2-errirq %d\n", errirq);
+ goto out_err;
+ }
+
+ on_each_cpu(kryo_l1_l2_irq_enable, &errirq, 1);
+
+ return ret;
+
+out_err:
+ free_percpu_irq(faultirq, &edac_dev);
+
+ return ret;
+}
+
+static int kryo_l3_setup_irq(struct platform_device *pdev, void *edev_ctl)
+{
+ int errirq, faultirq, ret;
+
+ faultirq = platform_get_irq_byname(pdev, "l3-scu-faultirq");
+ if (faultirq < 0) {
+ ret = faultirq;
+ goto out_fault;
+ }
+
+ ret = devm_request_irq(&pdev->dev, faultirq, kryo_l3_scu_handler,
+ IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
+ "kryo_l3_scu_ecc_faultirq", edev_ctl);
+ if (ret) {
+ edac_printk(KERN_DEBUG, DRV_NAME,
+ "Failed to request l3-scu-faultirq %d\n", faultirq);
+ }
+
+out_fault:
+ errirq = platform_get_irq_byname(pdev, "l3-scu-errirq");
+ if (errirq < 0) {
+ ret = errirq;
+ goto out_err;
+ }
+
+ ret = devm_request_irq(&pdev->dev, errirq, kryo_l3_scu_handler,
+ IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
+ "kryo_l3_scu_ecc_errirq", edev_ctl);
+ if (ret) {
+ edac_printk(KERN_DEBUG, DRV_NAME,
+ "Failed to request l3-scu-errirq %d\n", errirq);
+ }
+
+out_err:
+ return ret;
+}
+
+static int qcom_kryo_edac_setup_irq(struct platform_device *pdev,
+ struct edac_device_ctl_info *edev_ctl)
+{
+ int ret;
+
+ ret = kryo_l1_l2_setup_irq(pdev, edev_ctl);
+ if (ret) {
+ edac_printk(KERN_DEBUG, DRV_NAME,
+ "Failed to setup l1-l2 irq\n");
+ }
+
+ ret = kryo_l3_setup_irq(pdev, edev_ctl);
+ if (ret) {
+ edac_printk(KERN_DEBUG, DRV_NAME,
+ "Failed to setup l3-scu irq\n");
+ }
+
+ return ret;
+}
+
+static void kryo_poll_cache_error(struct edac_device_ctl_info *edev_ctl)
+{
+ if (!edev_ctl)
+ edev_ctl = drv_edev_ctl;
+
+ on_each_cpu(kryo_check_l1_l2_ecc, edev_ctl, 1);
+ kryo_check_l3_scu_ecc(edev_ctl);
+}
+
+static inline void kryo_enable_err_record(void)
+{
+ write_sysreg_s(KRYO_ERRXCTLR_ENABLE, SYS_ERXCTLR_EL1);
+ write_sysreg_s(KRYO_ERRXMISC0_CECR | KRYO_ERRXMISC0_CECO,
+ SYS_ERXMISC0_EL1);
+ isb();
+}
+
+static inline void qcom_kryo_init_l3(void)
+{
+ if (!FIELD_GET(KRYO_ERRXFR_SUPPORTED, read_sysreg_s(SYS_ERXFR_EL1)))
+ return;
+
+ /* L3 is shared */
+ write_sysreg_s(KRYO_ERR_RECORD_L3, SYS_ERRSELR_EL1);
+ kryo_enable_err_record();
+}
+
+static void qcom_kryo_init_l1_l2(void *data)
+{
+ if (!FIELD_GET(KRYO_ERRXFR_SUPPORTED, read_sysreg_s(SYS_ERXFR_EL1)))
+ return;
+
+ /* L1 and L2 is per-cpu */
+ write_sysreg_s(KRYO_ERR_RECORD_L1_L2, SYS_ERRSELR_EL1);
+ kryo_enable_err_record();
+}
+
+static int kryo_edac_pm_notify(struct notifier_block *nb, unsigned long action,
+ void *data)
+{
+ switch (action) {
+ case CPU_PM_EXIT:
+ qcom_kryo_init_l1_l2(NULL);
+ qcom_kryo_init_l3();
+ kryo_check_l1_l2_ecc(drv_edev_ctl);
+ kryo_check_l3_scu_ecc(drv_edev_ctl);
+ break;
+ default:
+ return NOTIFY_DONE;
+ }
+
+ return NOTIFY_OK;
+}
+
+static struct notifier_block kryo_edac_pm_nb = {
+ .notifier_call = kryo_edac_pm_notify,
+};
+
+static inline void qcom_kryo_edac_setup(void)
+{
+ on_each_cpu(qcom_kryo_init_l1_l2, NULL, 1);
+ qcom_kryo_init_l3();
+}
+
+static int qcom_kryo_edac_probe(struct platform_device *pdev)
+{
+ struct edac_device_ctl_info *edev_ctl;
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ qcom_kryo_edac_setup();
+
+ edev_ctl = edac_device_alloc_ctl_info(0, DRV_NAME, 1, "L", 3, 1, NULL,
+ 0, edac_device_alloc_index());
+ if (!edev_ctl)
+ return -ENOMEM;
+
+ if (IS_ENABLED(CONFIG_EDAC_QCOM_KRYO_POLL)) {
+ edev_ctl->poll_msec = poll_msec;
+ edev_ctl->edac_check = kryo_poll_cache_error;
+ }
+ edev_ctl->dev = dev;
+ edev_ctl->mod_name = DRV_NAME;
+ edev_ctl->dev_name = dev_name(dev);
+ edev_ctl->ctl_name = "qcom_kryo_cache";
+ edev_ctl->panic_on_ue = 1;
+
+ ret = edac_device_add_device(edev_ctl);
+ if (ret)
+ goto out_mem;
+
+ platform_set_drvdata(pdev, edev_ctl);
+ drv_edev_ctl = edev_ctl;
+
+ ret = qcom_kryo_edac_setup_irq(pdev, edev_ctl);
+ if (ret)
+ goto out_dev;
+
+ cpu_pm_register_notifier(&kryo_edac_pm_nb);
+
+ return ret;
+
+out_dev:
+ edac_device_del_device(edev_ctl->dev);
+out_mem:
+ edac_device_free_ctl_info(edev_ctl);
+
+ return ret;
+}
+
+static void qcom_kryo_edac_teardown(struct platform_device *pdev)
+{
+ int errirq, faultirq;
+
+ faultirq = platform_get_irq_byname(pdev, "l1-l2-faultirq");
+ on_each_cpu(kryo_l1_l2_irq_disable, &faultirq, 1);
+ free_percpu_irq(faultirq, &edac_dev);
+
+ errirq = platform_get_irq_byname(pdev, "l1-l2-errirq");
+ on_each_cpu(kryo_l1_l2_irq_disable, &errirq, 1);
+ free_percpu_irq(errirq, &edac_dev);
+
+ cpu_pm_unregister_notifier(&kryo_edac_pm_nb);
+}
+
+static int qcom_kryo_edac_remove(struct platform_device *pdev)
+{
+ struct edac_device_ctl_info *edev_ctl = platform_get_drvdata(pdev);
+
+ qcom_kryo_edac_teardown(pdev);
+
+ edac_device_del_device(edev_ctl->dev);
+ edac_device_free_ctl_info(edev_ctl);
+
+ return 0;
+}
+
+static const struct of_device_id qcom_kryo_edac_of_match[] = {
+ { .compatible = "qcom,kryo-edac" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, qcom_kryo_edac_of_match);
+
+static struct platform_driver qcom_kryo_edac_driver = {
+ .probe = qcom_kryo_edac_probe,
+ .remove = qcom_kryo_edac_remove,
+ .driver = {
+ .name = DRV_NAME,
+ .of_match_table = qcom_kryo_edac_of_match,
+ },
+};
+module_platform_driver(qcom_kryo_edac_driver);
+
+MODULE_DESCRIPTION("QCOM Kryo EDAC driver");
+MODULE_LICENSE("GPL v2");
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
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