summaryrefslogtreecommitdiffstats
path: root/drivers/edac
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/edac')
-rw-r--r--drivers/edac/Kconfig14
-rw-r--r--drivers/edac/Makefile1
-rw-r--r--drivers/edac/qcom_edac.c414
3 files changed, 429 insertions, 0 deletions
diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
index 57304b2e989f..df9467eef32a 100644
--- a/drivers/edac/Kconfig
+++ b/drivers/edac/Kconfig
@@ -460,4 +460,18 @@ config EDAC_TI
Support for error detection and correction on the
TI SoCs.
+config EDAC_QCOM
+ tristate "QCOM EDAC Controller"
+ depends on ARCH_QCOM && QCOM_LLCC
+ help
+ Support for error detection and correction on the
+ Qualcomm Technologies, Inc. SoCs.
+
+ This driver reports Single Bit Errors (SBEs) and Double Bit Errors (DBEs).
+ As of now, it supports error reporting for Last Level Cache Controller (LLCC)
+ of Tag RAM and Data RAM.
+
+ For debugging issues having to do with stability and overall system
+ health, you should probably say 'Y' here.
+
endif # EDAC
diff --git a/drivers/edac/Makefile b/drivers/edac/Makefile
index 02b43a7d8c3e..716096d08ea0 100644
--- a/drivers/edac/Makefile
+++ b/drivers/edac/Makefile
@@ -77,3 +77,4 @@ obj-$(CONFIG_EDAC_ALTERA) += altera_edac.o
obj-$(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
diff --git a/drivers/edac/qcom_edac.c b/drivers/edac/qcom_edac.c
new file mode 100644
index 000000000000..82bd775124f2
--- /dev/null
+++ b/drivers/edac/qcom_edac.c
@@ -0,0 +1,414 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/edac.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/soc/qcom/llcc-qcom.h>
+
+#include "edac_mc.h"
+#include "edac_device.h"
+
+#define EDAC_LLCC "qcom_llcc"
+
+#define LLCC_ERP_PANIC_ON_UE 1
+
+#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)
+#define ECC_DB_ERR_WAYS_SHIFT BIT(4)
+
+#define ECC_SB_ERR_COUNT_MASK GENMASK(23, 16)
+#define ECC_SB_ERR_COUNT_SHIFT BIT(4)
+#define ECC_SB_ERR_WAYS_MASK GENMASK(15, 0)
+
+#define SB_ECC_ERROR BIT(0)
+#define DB_ECC_ERROR BIT(1)
+
+#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
+#define TRP0_INTERRUPT_ENABLE 0x1
+#define DRP0_INTERRUPT_ENABLE BIT(6)
+#define SB_DB_DRP_INTERRUPT_ENABLE 0x3
+
+enum {
+ LLCC_DRAM_CE = 0,
+ LLCC_DRAM_UE,
+ LLCC_TRAM_CE,
+ LLCC_TRAM_UE,
+};
+
+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,
+ .count_shift = ECC_SB_ERR_COUNT_SHIFT,
+ },
+ [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,
+ .ways_shift = ECC_DB_ERR_WAYS_SHIFT,
+ },
+ [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,
+ .count_shift = ECC_SB_ERR_COUNT_SHIFT,
+ },
+ [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,
+ .ways_shift = ECC_DB_ERR_WAYS_SHIFT,
+ },
+};
+
+static int qcom_llcc_core_setup(struct regmap *llcc_bcast_regmap)
+{
+ u32 sb_err_threshold;
+ int ret;
+
+ /*
+ * 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,
+ TRP0_INTERRUPT_ENABLE,
+ TRP0_INTERRUPT_ENABLE);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(llcc_bcast_regmap, 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,
+ sb_err_threshold);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(llcc_bcast_regmap, CMN_INTERRUPT_2_ENABLE,
+ DRP0_INTERRUPT_ENABLE,
+ DRP0_INTERRUPT_ENABLE);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(llcc_bcast_regmap, DRP_INTERRUPT_ENABLE,
+ SB_DB_DRP_INTERRUPT_ENABLE);
+ return ret;
+}
+
+/* Clear the error interrupt and counter registers */
+static int
+qcom_llcc_clear_error_status(int err_type, struct llcc_drv_data *drv)
+{
+ int ret = 0;
+
+ switch (err_type) {
+ case LLCC_DRAM_CE:
+ case LLCC_DRAM_UE:
+ ret = regmap_write(drv->bcast_regmap, DRP_INTERRUPT_CLEAR,
+ DRP_TRP_INT_CLEAR);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(drv->bcast_regmap, 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,
+ DRP_TRP_INT_CLEAR);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(drv->bcast_regmap, TRP_ECC_ERROR_CNTR_CLEAR,
+ DRP_TRP_CNT_CLEAR);
+ if (ret)
+ return ret;
+ break;
+ default:
+ ret = -EINVAL;
+ edac_printk(KERN_CRIT, EDAC_LLCC, "Unexpected error type: %d\n",
+ err_type);
+ }
+ return ret;
+}
+
+/* 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];
+ int err_cnt, err_ways, ret, i;
+ u32 synd_reg, synd_val;
+
+ for (i = 0; i < reg_data.reg_cnt; i++) {
+ synd_reg = reg_data.synd_reg + (i * 4);
+ ret = regmap_read(drv->regmap, drv->offsets[bank] + synd_reg,
+ &synd_val);
+ if (ret)
+ goto clear;
+
+ edac_printk(KERN_CRIT, EDAC_LLCC, "%s: ECC_SYN%d: 0x%8x\n",
+ reg_data.name, i, synd_val);
+ }
+
+ ret = regmap_read(drv->regmap,
+ drv->offsets[bank] + reg_data.count_status_reg,
+ &err_cnt);
+ if (ret)
+ goto clear;
+
+ err_cnt &= reg_data.count_mask;
+ err_cnt >>= reg_data.count_shift;
+ edac_printk(KERN_CRIT, EDAC_LLCC, "%s: Error count: 0x%4x\n",
+ reg_data.name, err_cnt);
+
+ ret = regmap_read(drv->regmap,
+ drv->offsets[bank] + reg_data.ways_status_reg,
+ &err_ways);
+ if (ret)
+ goto clear;
+
+ err_ways &= reg_data.ways_mask;
+ err_ways >>= reg_data.ways_shift;
+
+ edac_printk(KERN_CRIT, EDAC_LLCC, "%s: Error ways: 0x%4x\n",
+ reg_data.name, err_ways);
+
+clear:
+ return qcom_llcc_clear_error_status(err_type, drv);
+}
+
+static int
+dump_syn_reg(struct edac_device_ctl_info *edev_ctl, int err_type, u32 bank)
+{
+ struct llcc_drv_data *drv = edev_ctl->pvt_info;
+ int ret;
+
+ ret = dump_syn_reg_values(drv, bank, err_type);
+ if (ret)
+ return ret;
+
+ switch (err_type) {
+ case LLCC_DRAM_CE:
+ edac_device_handle_ce(edev_ctl, 0, bank,
+ "LLCC Data RAM correctable Error");
+ break;
+ case LLCC_DRAM_UE:
+ edac_device_handle_ue(edev_ctl, 0, bank,
+ "LLCC Data RAM uncorrectable Error");
+ break;
+ case LLCC_TRAM_CE:
+ edac_device_handle_ce(edev_ctl, 0, bank,
+ "LLCC Tag RAM correctable Error");
+ break;
+ case LLCC_TRAM_UE:
+ edac_device_handle_ue(edev_ctl, 0, bank,
+ "LLCC Tag RAM uncorrectable Error");
+ break;
+ default:
+ ret = -EINVAL;
+ edac_printk(KERN_CRIT, EDAC_LLCC, "Unexpected error type: %d\n",
+ err_type);
+ }
+
+ return ret;
+}
+
+static irqreturn_t
+llcc_ecc_irq_handler(int irq, void *edev_ctl)
+{
+ struct edac_device_ctl_info *edac_dev_ctl = edev_ctl;
+ struct llcc_drv_data *drv = edac_dev_ctl->pvt_info;
+ irqreturn_t irq_rc = IRQ_NONE;
+ u32 drp_error, trp_error, i;
+ bool irq_handled;
+ int ret;
+
+ /* 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,
+ &drp_error);
+
+ if (!ret && (drp_error & SB_ECC_ERROR)) {
+ edac_printk(KERN_CRIT, EDAC_LLCC,
+ "Single Bit Error detected in Data RAM\n");
+ ret = dump_syn_reg(edev_ctl, LLCC_DRAM_CE, i);
+ } else if (!ret && (drp_error & DB_ECC_ERROR)) {
+ edac_printk(KERN_CRIT, EDAC_LLCC,
+ "Double Bit Error detected in Data RAM\n");
+ ret = dump_syn_reg(edev_ctl, LLCC_DRAM_UE, i);
+ }
+ if (!ret)
+ irq_handled = true;
+
+ ret = regmap_read(drv->regmap,
+ drv->offsets[i] + TRP_INTERRUPT_0_STATUS,
+ &trp_error);
+
+ if (!ret && (trp_error & SB_ECC_ERROR)) {
+ edac_printk(KERN_CRIT, EDAC_LLCC,
+ "Single Bit Error detected in Tag RAM\n");
+ ret = dump_syn_reg(edev_ctl, LLCC_TRAM_CE, i);
+ } else if (!ret && (trp_error & DB_ECC_ERROR)) {
+ edac_printk(KERN_CRIT, EDAC_LLCC,
+ "Double Bit Error detected in Tag RAM\n");
+ ret = dump_syn_reg(edev_ctl, LLCC_TRAM_UE, i);
+ }
+ if (!ret)
+ irq_handled = true;
+ }
+
+ if (irq_handled)
+ irq_rc = IRQ_HANDLED;
+
+ return irq_rc;
+}
+
+static int qcom_llcc_edac_probe(struct platform_device *pdev)
+{
+ struct llcc_drv_data *llcc_driv_data = pdev->dev.platform_data;
+ struct edac_device_ctl_info *edev_ctl;
+ struct device *dev = &pdev->dev;
+ int ecc_irq;
+ int rc;
+
+ rc = qcom_llcc_core_setup(llcc_driv_data->bcast_regmap);
+ if (rc)
+ return rc;
+
+ /* Allocate edac control info */
+ edev_ctl = edac_device_alloc_ctl_info(0, "qcom-llcc", 1, "bank",
+ llcc_driv_data->num_banks, 1,
+ NULL, 0,
+ edac_device_alloc_index());
+
+ if (!edev_ctl)
+ return -ENOMEM;
+
+ edev_ctl->dev = dev;
+ edev_ctl->mod_name = dev_name(dev);
+ edev_ctl->dev_name = dev_name(dev);
+ edev_ctl->ctl_name = "llcc";
+ edev_ctl->panic_on_ue = LLCC_ERP_PANIC_ON_UE;
+ edev_ctl->pvt_info = llcc_driv_data;
+
+ rc = edac_device_add_device(edev_ctl);
+ if (rc)
+ goto out_mem;
+
+ platform_set_drvdata(pdev, edev_ctl);
+
+ /* Request for ecc irq */
+ ecc_irq = llcc_driv_data->ecc_irq;
+ if (ecc_irq < 0) {
+ rc = -ENODEV;
+ goto out_dev;
+ }
+ rc = devm_request_irq(dev, ecc_irq, llcc_ecc_irq_handler,
+ IRQF_TRIGGER_HIGH, "llcc_ecc", edev_ctl);
+ if (rc)
+ goto out_dev;
+
+ return rc;
+
+out_dev:
+ edac_device_del_device(edev_ctl->dev);
+out_mem:
+ edac_device_free_ctl_info(edev_ctl);
+
+ return rc;
+}
+
+static int qcom_llcc_edac_remove(struct platform_device *pdev)
+{
+ struct edac_device_ctl_info *edev_ctl = dev_get_drvdata(&pdev->dev);
+
+ edac_device_del_device(edev_ctl->dev);
+ edac_device_free_ctl_info(edev_ctl);
+
+ return 0;
+}
+
+static struct platform_driver qcom_llcc_edac_driver = {
+ .probe = qcom_llcc_edac_probe,
+ .remove = qcom_llcc_edac_remove,
+ .driver = {
+ .name = "qcom_llcc_edac",
+ },
+};
+module_platform_driver(qcom_llcc_edac_driver);
+
+MODULE_DESCRIPTION("QCOM EDAC driver");
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 20:48:10 +0100