[PATCH v7 4/5] edac: Add APM X-Gene SoC EDAC driver

Loc Ho
2015-04-28T22:10:44Z

This patch adds support for the APM X-Gene SoC EDAC driver.

Signed-off-by: Feng Kan <fkan-qTEPVZfXA3Y@public.gmane.org>
Signed-off-by: Loc Ho <lho-qTEPVZfXA3Y@public.gmane.org>
---
drivers/edac/Kconfig | 9 +-
drivers/edac/Makefile | 1 +
drivers/edac/xgene_edac.c | 2175 +++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 2184 insertions(+), 1 deletions(-)
create mode 100644 drivers/edac/xgene_edac.c

diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
index cb59619..6289dd9 100644
--- a/drivers/edac/Kconfig
+++ b/drivers/edac/Kconfig
@@ -10,7 +10,7 @@ config EDAC_SUPPORT
menuconfig EDAC
bool "EDAC (Error Detection And Correction) reporting"
depends on HAS_IOMEM
- depends on X86 || PPC || TILE || ARM || EDAC_SUPPORT
+ depends on X86 || PPC || TILE || ARM || ARM64 || EDAC_SUPPORT
help
EDAC is designed to report errors in the core system.
These are low-level errors that are reported in the CPU or
@@ -392,4 +392,11 @@ config EDAC_SYNOPSYS
Support for error detection and correction on the Synopsys DDR
memory controller.

+config EDAC_XGENE
+ tristate "APM X-Gene SoC"
+ depends on EDAC_MM_EDAC && ARM64
+ help
+ Support for error detection and correction on the
+ APM X-Gene family of SOCs.
+
endif # EDAC
diff --git a/drivers/edac/Makefile b/drivers/edac/Makefile
index b255f36..28ef2a5 100644
--- a/drivers/edac/Makefile
+++ b/drivers/edac/Makefile
@@ -68,3 +68,4 @@ obj-$(CONFIG_EDAC_OCTEON_PCI) += octeon_edac-pci.o

obj-$(CONFIG_EDAC_ALTERA_MC) += altera_edac.o
obj-$(CONFIG_EDAC_SYNOPSYS) += synopsys_edac.o
+obj-$(CONFIG_EDAC_XGENE) += xgene_edac.o
diff --git a/drivers/edac/xgene_edac.c b/drivers/edac/xgene_edac.c
new file mode 100644
index 0000000..00a2547
--- /dev/null
+++ b/drivers/edac/xgene_edac.c
@@ -0,0 +1,2175 @@
+/*
+ * APM X-Gene SoC EDAC (error detection and correction) Module
+ *
+ * Copyright (c) 2015, Applied Micro Circuits Corporation
+ * Author: Feng Kan <fkan-qTEPVZfXA3Y@public.gmane.org>
+ * Loc Ho <lho-qTEPVZfXA3Y@public.gmane.org>
+ *
+ * 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, or (at your
+ * option) any later version.
+ *
+ * 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/ctype.h>
+#include <linux/edac.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+#include <asm/cputype.h>
+
+#include "edac_core.h"
+
+#define EDAC_MOD_STR "xgene_edac"
+
+static int edac_mc_idx;
+static int edac_mc_active_mask;
+static int edac_mc_registered_mask;
+static DEFINE_MUTEX(xgene_edac_lock);
+
+/* Global error configuration status registers (CSR) */
+#define PCPHPERRINTSTS 0x0000
+#define PCPHPERRINTMSK 0x0004
+#define MCU_CTL_ERR_MASK BIT(12)
+#define IOB_PA_ERR_MASK BIT(11)
+#define IOB_BA_ERR_MASK BIT(10)
+#define IOB_XGIC_ERR_MASK BIT(9)
+#define IOB_RB_ERR_MASK BIT(8)
+#define L3C_UNCORR_ERR_MASK BIT(5)
+#define MCU_UNCORR_ERR_MASK BIT(4)
+#define PMD3_MERR_MASK BIT(3)
+#define PMD2_MERR_MASK BIT(2)
+#define PMD1_MERR_MASK BIT(1)
+#define PMD0_MERR_MASK BIT(0)
+#define PCPLPERRINTSTS 0x0008
+#define PCPLPERRINTMSK 0x000C
+#define CSW_SWITCH_TRACE_ERR_MASK BIT(2)
+#define L3C_CORR_ERR_MASK BIT(1)
+#define MCU_CORR_ERR_MASK BIT(0)
+#define MEMERRINTSTS 0x0010
+#define MEMERRINTMSK 0x0014
+
+/* Memory controller error CSR */
+#define MCU_MAX_RANK 8
+#define MCU_RANK_STRIDE 0x40
+
+#define MCUGECR 0x0110
+#define MCU_GECR_DEMANDUCINTREN_MASK BIT(0)
+#define MCU_GECR_BACKUCINTREN_MASK BIT(1)
+#define MCU_GECR_CINTREN_MASK BIT(2)
+#define MUC_GECR_MCUADDRERREN_MASK BIT(9)
+#define MCUGESR 0x0114
+#define MCU_GESR_ADDRNOMATCH_ERR_MASK BIT(7)
+#define MCU_GESR_ADDRMULTIMATCH_ERR_MASK BIT(6)
+#define MCU_GESR_PHYP_ERR_MASK BIT(3)
+#define MCUESRR0 0x0314
+#define MCU_ESRR_MULTUCERR_MASK BIT(3)
+#define MCU_ESRR_BACKUCERR_MASK BIT(2)
+#define MCU_ESRR_DEMANDUCERR_MASK BIT(1)
+#define MCU_ESRR_CERR_MASK BIT(0)
+#define MCUESRRA0 0x0318
+#define MCUEBLRR0 0x031c
+#define MCU_EBLRR_ERRBANK_RD(src) (((src) & 0x00000007) >> 0)
+#define MCUERCRR0 0x0320
+#define MCU_ERCRR_ERRROW_RD(src) (((src) & 0xFFFF0000) >> 16)
+#define MCU_ERCRR_ERRCOL_RD(src) ((src) & 0x00000FFF)
+#define MCUSBECNT0 0x0324
+#define MCU_SBECNT_COUNT(src) ((src) & 0xFFFF)
+
+#define CSW_CSWCR 0x0000
+#define CSW_CSWCR_DUALMCB_MASK BIT(0)
+
+#define MCBADDRMR 0x0000
+#define MCBADDRMR_MCU_INTLV_MODE_MASK BIT(3)
+#define MCBADDRMR_DUALMCU_MODE_MASK BIT(2)
+#define MCBADDRMR_MCB_INTLV_MODE_MASK BIT(1)
+#define MCBADDRMR_ADDRESS_MODE_MASK BIT(0)
+
+struct xgene_edac_mc_ctx {
+ char *name;
+ struct regmap *pcp_map;
+ struct regmap *csw_map;
+ struct regmap *mcba_map;
+ struct regmap *mcbb_map;
+ void __iomem *mcu_csr;
+ int mcu_id;
+};
+
+#define to_mci(k) container_of(k, struct mem_ctl_info, dev)
+
+#ifdef CONFIG_EDAC_DEBUG
+static ssize_t xgene_edac_mc_err_inject_write(struct file *file,
+ const char __user *data,
+ size_t count, loff_t *ppos)
+{
+ struct mem_ctl_info *mci = file->private_data;
+ struct xgene_edac_mc_ctx *ctx = mci->pvt_info;
+ int i;
+
+ for (i = 0; i < MCU_MAX_RANK; i++) {
+ writel(MCU_ESRR_MULTUCERR_MASK | MCU_ESRR_BACKUCERR_MASK |
+ MCU_ESRR_DEMANDUCERR_MASK | MCU_ESRR_CERR_MASK,
+ ctx->mcu_csr + MCUESRRA0 + i * MCU_RANK_STRIDE);
+ }
+ return count;
+}
+
+static const struct file_operations xgene_edac_mc_debug_inject_fops = {
+ .open = simple_open,
+ .write = xgene_edac_mc_err_inject_write,
+ .llseek = generic_file_llseek,
+};
+
+static void xgene_edac_mc_create_debugfs_node(struct mem_ctl_info *mci)
+{
+ if (!mci->debugfs)
+ return;
+
+ debugfs_create_file("inject_ctrl", S_IWUSR, mci->debugfs, mci,
+ &xgene_edac_mc_debug_inject_fops);
+}
+#else
+static void xgene_edac_mc_create_debugfs_node(struct mem_ctl_info *mci)
+{
+}
+#endif
+
+static void xgene_edac_mc_check(struct mem_ctl_info *mci)
+{
+ struct xgene_edac_mc_ctx *ctx = mci->pvt_info;
+ unsigned int pcp_hp_stat;
+ unsigned int pcp_lp_stat;
+ u32 reg;
+ u32 rank;
+ u32 bank;
+ u32 count;
+ u32 col_row;
+
+ if (regmap_read(ctx->pcp_map, PCPHPERRINTSTS, &pcp_hp_stat))
+ return;
+ if (regmap_read(ctx->pcp_map, PCPLPERRINTSTS, &pcp_lp_stat))
+ return;
+ if (!((MCU_UNCORR_ERR_MASK & pcp_hp_stat) ||
+ (MCU_CTL_ERR_MASK & pcp_hp_stat) ||
+ (MCU_CORR_ERR_MASK & pcp_lp_stat)))
+ return;
+
+ for (rank = 0; rank < MCU_MAX_RANK; rank++) {
+ reg = readl(ctx->mcu_csr + MCUESRR0 + rank * MCU_RANK_STRIDE);
+
+ /* Detect uncorrectable memory error */
+ if (reg & (MCU_ESRR_DEMANDUCERR_MASK |
+ MCU_ESRR_BACKUCERR_MASK)) {
+ /* Detected uncorrectable memory error */
+ edac_mc_chipset_printk(mci, KERN_ERR, "X-Gene",
+ "MCU uncorrectable error at rank %d\n", rank);
+
+ edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci,
+ 1, 0, 0, 0, 0, 0, -1, mci->ctl_name, "");
+ }
+
+ /* Detect correctable memory error */
+ if (reg & MCU_ESRR_CERR_MASK) {
+ bank = readl(ctx->mcu_csr + MCUEBLRR0 +
+ rank * MCU_RANK_STRIDE);
+ col_row = readl(ctx->mcu_csr + MCUERCRR0 +
+ rank * MCU_RANK_STRIDE);
+ count = readl(ctx->mcu_csr + MCUSBECNT0 +
+ rank * MCU_RANK_STRIDE);
+ edac_mc_chipset_printk(mci, KERN_WARNING, "X-Gene",
+ "MCU correctable error at rank %d bank %d column %d row %d count %d\n",
+ rank, MCU_EBLRR_ERRBANK_RD(bank),
+ MCU_ERCRR_ERRCOL_RD(col_row),
+ MCU_ERCRR_ERRROW_RD(col_row),
+ MCU_SBECNT_COUNT(count));
+
+ edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci,
+ 1, 0, 0, 0, 0, 0, -1, mci->ctl_name, "");
+ }
+
+ /* Clear all error registers */
+ writel(0x0, ctx->mcu_csr + MCUEBLRR0 + rank * MCU_RANK_STRIDE);
+ writel(0x0, ctx->mcu_csr + MCUERCRR0 + rank * MCU_RANK_STRIDE);
+ writel(0x0, ctx->mcu_csr + MCUSBECNT0 +
+ rank * MCU_RANK_STRIDE);
+ writel(reg, ctx->mcu_csr + MCUESRR0 + rank * MCU_RANK_STRIDE);
+ }
+
+ /* Detect memory controller error */
+ reg = readl(ctx->mcu_csr + MCUGESR);
+ if (reg) {
+ if (reg & MCU_GESR_ADDRNOMATCH_ERR_MASK)
+ edac_mc_chipset_printk(mci, KERN_WARNING, "X-Gene",
+ "MCU address miss-match error\n");
+ if (reg & MCU_GESR_ADDRMULTIMATCH_ERR_MASK)
+ edac_mc_chipset_printk(mci, KERN_WARNING, "X-Gene",
+ "MCU address multi-match error\n");
+
+ writel(reg, ctx->mcu_csr + MCUGESR);
+ }
+}
+
+static irqreturn_t xgene_edac_mc_isr(int irq, void *dev_id)
+{
+ struct mem_ctl_info *mci = dev_id;
+ struct xgene_edac_mc_ctx *ctx = mci->pvt_info;
+ unsigned int pcp_hp_stat;
+ unsigned int pcp_lp_stat;
+
+ if (regmap_read(ctx->pcp_map, PCPHPERRINTSTS, &pcp_hp_stat))
+ return IRQ_NONE;
+ if (regmap_read(ctx->pcp_map, PCPLPERRINTSTS, &pcp_lp_stat))
+ return IRQ_NONE;
+ if (!((MCU_UNCORR_ERR_MASK & pcp_hp_stat) ||
+ (MCU_CTL_ERR_MASK & pcp_hp_stat) ||
+ (MCU_CORR_ERR_MASK & pcp_lp_stat)))
+ return IRQ_NONE;
+
+ xgene_edac_mc_check(mci);
+
+ return IRQ_HANDLED;
+}
+
+static void xgene_edac_mc_irq_ctl(struct mem_ctl_info *mci, bool enable)
+{
+ struct xgene_edac_mc_ctx *ctx = mci->pvt_info;
+ unsigned int val;
+
+ if (edac_op_state != EDAC_OPSTATE_INT)
+ return;
+
+ mutex_lock(&xgene_edac_lock);
+
+ /*
+ * As there is only single bit for enable error and interrupt mask,
+ * we must only enable top level interrupt after all MCUs are
+ * registered. Otherwise, if there is an error and the corresponding
+ * MCU has not registered, the interrupt will never get cleared. To
+ * determine all MCU have registered, we will keep track of active
+ * MCUs and registered MCUs.
+ */
+ if (enable) {
+ /* Set registered MCU bit */
+ edac_mc_registered_mask |= 1 << ctx->mcu_id;
+
+ /* Enable interrupt after all active MCU registered */
+ if (edac_mc_registered_mask == edac_mc_active_mask) {
+ /* Enable memory controller top level interrupt */
+ if (regmap_read(ctx->pcp_map, PCPHPERRINTMSK, &val))
+ goto err;
+ val &= ~(MCU_UNCORR_ERR_MASK | MCU_CTL_ERR_MASK);
+ if (regmap_write(ctx->pcp_map, PCPHPERRINTMSK, val))
+ goto err;
+ if (regmap_read(ctx->pcp_map, PCPLPERRINTMSK, &val))
+ goto err;
+ val &= ~MCU_CORR_ERR_MASK;
+ if (regmap_write(ctx->pcp_map, PCPLPERRINTMSK, val))
+ goto err;
+ }
+
+ /* Enable MCU interrupt and error reporting */
+ val = readl(ctx->mcu_csr + MCUGECR);
+ val |= MCU_GECR_DEMANDUCINTREN_MASK |
+ MCU_GECR_BACKUCINTREN_MASK |
+ MCU_GECR_CINTREN_MASK |
+ MUC_GECR_MCUADDRERREN_MASK;
+ writel(val, ctx->mcu_csr + MCUGECR);
+ } else {
+ /* Disable MCU interrupt */
+ val = readl(ctx->mcu_csr + MCUGECR);
+ val &= ~(MCU_GECR_DEMANDUCINTREN_MASK |
+ MCU_GECR_BACKUCINTREN_MASK |
+ MCU_GECR_CINTREN_MASK |
+ MUC_GECR_MCUADDRERREN_MASK);
+ writel(val, ctx->mcu_csr + MCUGECR);
+
+ /* Disable memory controller top level interrupt */
+ if (regmap_read(ctx->pcp_map, PCPHPERRINTMSK, &val))
+ goto err;
+ val |= MCU_UNCORR_ERR_MASK | MCU_CTL_ERR_MASK;
+ if (regmap_write(ctx->pcp_map, PCPHPERRINTMSK, val))
+ goto err;
+ if (regmap_read(ctx->pcp_map, PCPLPERRINTMSK, &val))
+ goto err;
+ val |= MCU_CORR_ERR_MASK;
+ if (regmap_write(ctx->pcp_map, PCPLPERRINTMSK, val))
+ goto err;
+
+ /* Clear registered MCU bit */
+ edac_mc_registered_mask &= ~(1 << ctx->mcu_id);
+ }
+
+err:
+ mutex_unlock(&xgene_edac_lock);
+}
+
+static int xgene_edac_mc_is_active(struct xgene_edac_mc_ctx *ctx, int mc_idx)
+{
+ unsigned int reg;
+ u32 mcu_mask;
+
+ if (regmap_read(ctx->csw_map, CSW_CSWCR, &reg))
+ return 0;
+
+ if (reg & CSW_CSWCR_DUALMCB_MASK) {
+ /*
+ * Dual MCB active - Determine if all 4 active or just MCU0
+ * and MCU2 active
+ */
+ if (regmap_read(ctx->mcbb_map, MCBADDRMR, &reg))
+ return 0;
+ mcu_mask = (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0xF : 0x5;
+ } else {
+ /*
+ * Single MCB active - Determine if MCU0/MCU1 or just MCU0
+ * active
+ */
+ if (regmap_read(ctx->mcba_map, MCBADDRMR, &reg))
+ return 0;
+ mcu_mask = (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0x3 : 0x1;
+ }
+
+ /* Save active MC mask if hasn't set already */
+ if (!edac_mc_active_mask)
+ edac_mc_active_mask = mcu_mask;
+
+ return (mcu_mask & (1 << mc_idx)) ? 1 : 0;
+}
+
+static int xgene_edac_mc_probe(struct platform_device *pdev)
+{
+ struct mem_ctl_info *mci;
+ struct edac_mc_layer layers[2];
+ struct xgene_edac_mc_ctx tmp_ctx;
+ struct xgene_edac_mc_ctx *ctx;
+ struct resource *res;
+ int rc = 0;
+
+ if (!devres_open_group(&pdev->dev, xgene_edac_mc_probe, GFP_KERNEL))
+ return -ENOMEM;
+
+ tmp_ctx.pcp_map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
+ "regmap-pcp");
+ if (IS_ERR(tmp_ctx.pcp_map)) {
+ dev_err(&pdev->dev, "unable to get syscon regmap pcp\n");
+ rc = PTR_ERR(tmp_ctx.pcp_map);
+ goto err_group;
+ }
+
+ tmp_ctx.csw_map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
+ "regmap-csw");
+ if (IS_ERR(tmp_ctx.csw_map)) {
+ dev_err(&pdev->dev, "unable to get syscon regmap csw\n");
+ rc = PTR_ERR(tmp_ctx.csw_map);
+ goto err_group;
+ }
+
+ tmp_ctx.mcba_map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
+ "regmap-mcba");
+ if (IS_ERR(tmp_ctx.mcba_map)) {
+ dev_err(&pdev->dev, "unable to get syscon regmap mcba\n");
+ rc = PTR_ERR(tmp_ctx.mcba_map);
+ goto err_group;
+ }
+
+ tmp_ctx.mcbb_map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
+ "regmap-mcbb");
+ if (IS_ERR(tmp_ctx.mcbb_map)) {
+ dev_err(&pdev->dev, "unable to get syscon regmap mcbb\n");
+ rc = PTR_ERR(tmp_ctx.mcbb_map);
+ goto err_group;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ tmp_ctx.mcu_csr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(tmp_ctx.mcu_csr)) {
+ dev_err(&pdev->dev, "no MCU resource address\n");
+ rc = PTR_ERR(tmp_ctx.mcu_csr);
+ goto err_group;
+ }
+ /* Ignore non-active MCU */
+ tmp_ctx.mcu_id = ((res->start >> 16) & 0xF) / 4;
+ if (!xgene_edac_mc_is_active(&tmp_ctx, tmp_ctx.mcu_id)) {
+ rc = -ENODEV;
+ goto err_group;
+ }
+
+ layers[0].type = EDAC_MC_LAYER_CHIP_SELECT;
+ layers[0].size = 4;
+ layers[0].is_virt_csrow = true;
+ layers[1].type = EDAC_MC_LAYER_CHANNEL;
+ layers[1].size = 2;
+ layers[1].is_virt_csrow = false;
+ mci = edac_mc_alloc(edac_mc_idx++, ARRAY_SIZE(layers), layers,
+ sizeof(*ctx));
+ if (!mci) {
+ rc = -ENOMEM;
+ goto err_group;
+ }
+
+ ctx = mci->pvt_info;
+ *ctx = tmp_ctx; /* Copy over resource value */
+ ctx->name = "xgene_edac_mc_err";
+ mci->pdev = &pdev->dev;
+ dev_set_drvdata(mci->pdev, mci);
+ mci->ctl_name = ctx->name;
+ mci->dev_name = ctx->name;
+
+ mci->mtype_cap = MEM_FLAG_RDDR | MEM_FLAG_RDDR2 | MEM_FLAG_RDDR3 |
+ MEM_FLAG_DDR | MEM_FLAG_DDR2 | MEM_FLAG_DDR3;
+ mci->edac_ctl_cap = EDAC_FLAG_SECDED;
+ mci->edac_cap = EDAC_FLAG_SECDED;
+ mci->mod_name = EDAC_MOD_STR;
+ mci->mod_ver = "0.1";
+ mci->ctl_page_to_phys = NULL;
+ mci->scrub_cap = SCRUB_FLAG_HW_SRC;
+ mci->scrub_mode = SCRUB_HW_SRC;
+
+ if (edac_op_state == EDAC_OPSTATE_POLL)
+ mci->edac_check = xgene_edac_mc_check;
+
+ if (edac_mc_add_mc(mci)) {
+ dev_err(&pdev->dev, "edac_mc_add_mc failed\n");
+ rc = -EINVAL;
+ goto err_free;
+ }
+
+ xgene_edac_mc_create_debugfs_node(mci);
+
+ if (edac_op_state == EDAC_OPSTATE_INT) {
+ int irq;
+ int i;
+
+ for (i = 0; i < 2; i++) {
+ irq = platform_get_irq(pdev, i);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "No IRQ resource\n");
+ rc = -EINVAL;
+ goto err_del;
+ }
+ rc = devm_request_irq(&pdev->dev, irq,
+ xgene_edac_mc_isr, IRQF_SHARED,
+ dev_name(&pdev->dev), mci);
+ if (rc) {
+ dev_err(&pdev->dev,
+ "Could not request IRQ %d\n", irq);
+ goto err_del;
+ }
+ }
+ }
+
+ xgene_edac_mc_irq_ctl(mci, true);
+
+ devres_remove_group(&pdev->dev, xgene_edac_mc_probe);
+
+ dev_info(&pdev->dev, "X-Gene EDAC MC registered\n");
+ return 0;
+
+err_del:
+ edac_mc_del_mc(&pdev->dev);
+err_free:
+ edac_mc_free(mci);
+err_group:
+ devres_release_group(&pdev->dev, xgene_edac_mc_probe);
+ return rc;
+}
+
+static int xgene_edac_mc_remove(struct platform_device *pdev)
+{
+ struct mem_ctl_info *mci = dev_get_drvdata(&pdev->dev);
+
+ xgene_edac_mc_irq_ctl(mci, false);
+ edac_mc_del_mc(&pdev->dev);
+ edac_mc_free(mci);
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static struct of_device_id xgene_edac_mc_of_match[] = {
+ { .compatible = "apm,xgene-edac-mc" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, xgene_edac_of_match);
+#endif
+
+static struct platform_driver xgene_edac_mc_driver = {
+ .probe = xgene_edac_mc_probe,
+ .remove = xgene_edac_mc_remove,
+ .driver = {
+ .name = "xgene-edac-mc",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(xgene_edac_mc_of_match),
+ },
+};
+
+/* CPU L1/L2 error device */
+#define MAX_CPU_PER_PMD 2
+#define CPU_CSR_STRIDE 0x00100000
+#define CPU_L2C_PAGE 0x000D0000
+#define CPU_MEMERR_L2C_PAGE 0x000E0000
+#define CPU_MEMERR_CPU_PAGE 0x000F0000
+
+#define MEMERR_CPU_ICFECR_PAGE_OFFSET 0x0000
+#define MEMERR_CPU_ICFESR_PAGE_OFFSET 0x0004
+#define MEMERR_CPU_ICFESR_ERRWAY_RD(src) (((src) & 0xFF000000) >> 24)
+#define MEMERR_CPU_ICFESR_ERRINDEX_RD(src) (((src) & 0x003F0000) >> 16)
+#define MEMERR_CPU_ICFESR_ERRINFO_RD(src) (((src) & 0x0000FF00) >> 8)
+#define MEMERR_CPU_ICFESR_ERRTYPE_RD(src) (((src) & 0x00000070) >> 4)
+#define MEMERR_CPU_ICFESR_MULTCERR_MASK BIT(2)
+#define MEMERR_CPU_ICFESR_CERR_MASK BIT(0)
+#define MEMERR_CPU_LSUESR_PAGE_OFFSET 0x000c
+#define MEMERR_CPU_LSUESR_ERRWAY_RD(src) (((src) & 0xFF000000) >> 24)
+#define MEMERR_CPU_LSUESR_ERRINDEX_RD(src) (((src) & 0x003F0000) >> 16)
+#define MEMERR_CPU_LSUESR_ERRINFO_RD(src) (((src) & 0x0000FF00) >> 8)
+#define MEMERR_CPU_LSUESR_ERRTYPE_RD(src) (((src) & 0x00000070) >> 4)
+#define MEMERR_CPU_LSUESR_MULTCERR_MASK BIT(2)
+#define MEMERR_CPU_LSUESR_CERR_MASK BIT(0)
+#define MEMERR_CPU_LSUECR_PAGE_OFFSET 0x0008
+#define MEMERR_CPU_MMUECR_PAGE_OFFSET 0x0010
+#define MEMERR_CPU_MMUESR_PAGE_OFFSET 0x0014
+#define MEMERR_CPU_MMUESR_ERRWAY_RD(src) (((src) & 0xFF000000) >> 24)
+#define MEMERR_CPU_MMUESR_ERRINDEX_RD(src) (((src) & 0x007F0000) >> 16)
+#define MEMERR_CPU_MMUESR_ERRINFO_RD(src) (((src) & 0x0000FF00) >> 8)
+#define MEMERR_CPU_MMUESR_ERRREQSTR_LSU_MASK BIT(7)
+#define MEMERR_CPU_MMUESR_ERRTYPE_RD(src) (((src) & 0x00000070) >> 4)
+#define MEMERR_CPU_MMUESR_MULTCERR_MASK BIT(2)
+#define MEMERR_CPU_MMUESR_CERR_MASK BIT(0)
+#define MEMERR_CPU_ICFESRA_PAGE_OFFSET 0x0804
+#define MEMERR_CPU_LSUESRA_PAGE_OFFSET 0x080c
+#define MEMERR_CPU_MMUESRA_PAGE_OFFSET 0x0814
+
+#define MEMERR_L2C_L2ECR_PAGE_OFFSET 0x0000
+#define MEMERR_L2C_L2ESR_PAGE_OFFSET 0x0004
+#define MEMERR_L2C_L2ESR_ERRSYN_RD(src) (((src) & 0xFF000000) >> 24)
+#define MEMERR_L2C_L2ESR_ERRWAY_RD(src) (((src) & 0x00FC0000) >> 18)
+#define MEMERR_L2C_L2ESR_ERRCPU_RD(src) (((src) & 0x00020000) >> 17)
+#define MEMERR_L2C_L2ESR_ERRGROUP_RD(src) (((src) & 0x0000E000) >> 13)
+#define MEMERR_L2C_L2ESR_ERRACTION_RD(src) (((src) & 0x00001C00) >> 10)
+#define MEMERR_L2C_L2ESR_ERRTYPE_RD(src) (((src) & 0x00000300) >> 8)
+#define MEMERR_L2C_L2ESR_MULTUCERR_MASK BIT(3)
+#define MEMERR_L2C_L2ESR_MULTICERR_MASK BIT(2)
+#define MEMERR_L2C_L2ESR_UCERR_MASK BIT(1)
+#define MEMERR_L2C_L2ESR_ERR_MASK BIT(0)
+#define MEMERR_L2C_L2EALR_PAGE_OFFSET 0x0008
+#define CPUX_L2C_L2RTOCR_PAGE_OFFSET 0x0010
+#define MEMERR_L2C_L2EAHR_PAGE_OFFSET 0x000c
+#define CPUX_L2C_L2RTOSR_PAGE_OFFSET 0x0014
+#define MEMERR_L2C_L2RTOSR_MULTERR_MASK BIT(1)
+#define MEMERR_L2C_L2RTOSR_ERR_MASK BIT(0)
+#define CPUX_L2C_L2RTOALR_PAGE_OFFSET 0x0018
+#define CPUX_L2C_L2RTOAHR_PAGE_OFFSET 0x001c
+#define MEMERR_L2C_L2ESRA_PAGE_OFFSET 0x0804
+
+/*
+ * Processor Module Domain (PMD) context - Context for a pair of processsors.
+ * Each PMD consists of 2 CPUs and a shared L2 cache. Each CPU consists of
+ * its own L1 cache.
+ */
+struct xgene_edac_pmd_ctx {
+ char *name;
+ struct regmap *pcp_map; /* PCP CSR for reading error interrupt reg */
+ void __iomem *pmd_csr; /* PMD CSR for reading L1/L2 error reg */
+ int pmd; /* Identify the register in pcp_csr */
+};
+
+static void xgene_edac_pmd_l1_check(struct edac_device_ctl_info *edac_dev,
+ int cpu_idx)
+{
+ struct xgene_edac_pmd_ctx *ctx = edac_dev->pvt_info;
+ void __iomem *pg_f;
+ u32 val;
+
+ pg_f = ctx->pmd_csr + cpu_idx * CPU_CSR_STRIDE + CPU_MEMERR_CPU_PAGE;
+
+ val = readl(pg_f + MEMERR_CPU_ICFESR_PAGE_OFFSET);
+ if (val) {
+ dev_err(edac_dev->dev,
+ "CPU%d L1 memory error ICF 0x%08X Way 0x%02X Index 0x%02X Info 0x%02X\n",
+ ctx->pmd * MAX_CPU_PER_PMD + cpu_idx, val,
+ MEMERR_CPU_ICFESR_ERRWAY_RD(val),
+ MEMERR_CPU_ICFESR_ERRINDEX_RD(val),
+ MEMERR_CPU_ICFESR_ERRINFO_RD(val));
+ if (val & MEMERR_CPU_ICFESR_CERR_MASK)
+ dev_err(edac_dev->dev,
+ "One or more correctable error\n");
+ if (val & MEMERR_CPU_ICFESR_MULTCERR_MASK)
+ dev_err(edac_dev->dev, "Multiple correctable error\n");
+ switch (MEMERR_CPU_ICFESR_ERRTYPE_RD(val)) {
+ case 1:
+ dev_err(edac_dev->dev, "L1 TLB multiple hit\n");
+ break;
+ case 2:
+ dev_err(edac_dev->dev, "Way select multiple hit\n");
+ break;
+ case 3:
+ dev_err(edac_dev->dev, "Physical tag parity error\n");
+ break;
+ case 4:
+ case 5:
+ dev_err(edac_dev->dev, "L1 data parity error\n");
+ break;
+ case 6:
+ dev_err(edac_dev->dev, "L1 pre-decode parity error\n");
+ break;
+ }
+
+ /* Clear any HW errors */
+ writel(val, pg_f + MEMERR_CPU_ICFESR_PAGE_OFFSET);
+
+ if (val & (MEMERR_CPU_ICFESR_CERR_MASK |
+ MEMERR_CPU_ICFESR_MULTCERR_MASK))
+ edac_device_handle_ce(edac_dev, 0, 0,
+ edac_dev->ctl_name);
+ }
+
+ val = readl(pg_f + MEMERR_CPU_LSUESR_PAGE_OFFSET);
+ if (val) {
+ dev_err(edac_dev->dev,
+ "CPU%d memory error LSU 0x%08X Way 0x%02X Index 0x%02X Info 0x%02X\n",
+ ctx->pmd * MAX_CPU_PER_PMD + cpu_idx, val,
+ MEMERR_CPU_LSUESR_ERRWAY_RD(val),
+ MEMERR_CPU_LSUESR_ERRINDEX_RD(val),
+ MEMERR_CPU_LSUESR_ERRINFO_RD(val));
+ if (val & MEMERR_CPU_LSUESR_CERR_MASK)
+ dev_err(edac_dev->dev,
+ "One or more correctable error\n");
+ if (val & MEMERR_CPU_LSUESR_MULTCERR_MASK)
+ dev_err(edac_dev->dev, "Multiple correctable error\n");
+ switch (MEMERR_CPU_LSUESR_ERRTYPE_RD(val)) {
+ case 0:
+ dev_err(edac_dev->dev, "Load tag error\n");
+ break;
+ case 1:
+ dev_err(edac_dev->dev, "Load data error\n");
+ break;
+ case 2:
+ dev_err(edac_dev->dev, "WSL multihit error\n");
+ break;
+ case 3:
+ dev_err(edac_dev->dev, "Store tag error\n");
+ break;
+ case 4:
+ dev_err(edac_dev->dev,
+ "DTB multihit from load pipeline error\n");
+ break;
+ case 5:
+ dev_err(edac_dev->dev,
+ "DTB multihit from store pipeline error\n");
+ break;
+ }
+
+ /* Clear any HW errors */
+ writel(val, pg_f + MEMERR_CPU_LSUESR_PAGE_OFFSET);
+
+ if (val & (MEMERR_CPU_LSUESR_CERR_MASK |
+ MEMERR_CPU_LSUESR_MULTCERR_MASK))
+ edac_device_handle_ce(edac_dev, 0, 0,
+ edac_dev->ctl_name);
+ }
+
+ val = readl(pg_f + MEMERR_CPU_MMUESR_PAGE_OFFSET);
+ if (val) {
+ dev_err(edac_dev->dev,
+ "CPU%d memory error MMU 0x%08X Way 0x%02X Index 0x%02X Info 0x%02X %s\n",
+ ctx->pmd * MAX_CPU_PER_PMD + cpu_idx, val,
+ MEMERR_CPU_MMUESR_ERRWAY_RD(val),
+ MEMERR_CPU_MMUESR_ERRINDEX_RD(val),
+ MEMERR_CPU_MMUESR_ERRINFO_RD(val),
+ val & MEMERR_CPU_MMUESR_ERRREQSTR_LSU_MASK ? "LSU" :
+ "ICF");
+ if (val & MEMERR_CPU_MMUESR_CERR_MASK)
+ dev_err(edac_dev->dev,
+ "One or more correctable error\n");
+ if (val & MEMERR_CPU_MMUESR_MULTCERR_MASK)
+ dev_err(edac_dev->dev, "Multiple correctable error\n");
+ switch (MEMERR_CPU_MMUESR_ERRTYPE_RD(val)) {
+ case 0:
+ dev_err(edac_dev->dev, "Stage 1 UTB hit error\n");
+ break;
+ case 1:
+ dev_err(edac_dev->dev, "Stage 1 UTB miss error\n");
+ break;
+ case 2:
+ dev_err(edac_dev->dev, "Stage 1 UTB allocate error\n");
+ break;
+ case 3:
+ dev_err(edac_dev->dev,
+ "TMO operation single bank error\n");
+ break;
+ case 4:
+ dev_err(edac_dev->dev, "Stage 2 UTB error\n");
+ break;
+ case 5:
+ dev_err(edac_dev->dev, "Stage 2 UTB miss error\n");
+ break;
+ case 6:
+ dev_err(edac_dev->dev, "Stage 2 UTB allocate error\n");
+ break;
+ case 7:
+ dev_err(edac_dev->dev,
+ "TMO operation multiple bank error\n");
+ break;
+ }
+
+ /* Clear any HW errors */
+ writel(val, pg_f + MEMERR_CPU_MMUESR_PAGE_OFFSET);
+
+ edac_device_handle_ce(edac_dev, 0, 0, edac_dev->ctl_name);
+ }
+}
+
+static void xgene_edac_pmd_l2_check(struct edac_device_ctl_info *edac_dev)
+{
+ struct xgene_edac_pmd_ctx *ctx = edac_dev->pvt_info;
+ void __iomem *pg_d;
+ void __iomem *pg_e;
+ u32 val_hi;
+ u32 val_lo;
+ u32 val;
+
+ /* Check L2 */
+ pg_e = ctx->pmd_csr + CPU_MEMERR_L2C_PAGE;
+ val = readl(pg_e + MEMERR_L2C_L2ESR_PAGE_OFFSET);
+ if (val) {
+ val_lo = readl(pg_e + MEMERR_L2C_L2EALR_PAGE_OFFSET);
+ val_hi = readl(pg_e + MEMERR_L2C_L2EAHR_PAGE_OFFSET);
+ dev_err(edac_dev->dev,
+ "PMD%d memory error L2C L2ESR 0x%08X @ 0x%08X.%08X\n",
+ ctx->pmd, val, val_hi, val_lo);
+ dev_err(edac_dev->dev,
+ "ErrSyndrome 0x%02X ErrWay 0x%02X ErrCpu %d ErrGroup 0x%02X ErrAction 0x%02X\n",
+ MEMERR_L2C_L2ESR_ERRSYN_RD(val),
+ MEMERR_L2C_L2ESR_ERRWAY_RD(val),
+ MEMERR_L2C_L2ESR_ERRCPU_RD(val),
+ MEMERR_L2C_L2ESR_ERRGROUP_RD(val),
+ MEMERR_L2C_L2ESR_ERRACTION_RD(val));
+
+ if (val & MEMERR_L2C_L2ESR_ERR_MASK)
+ dev_err(edac_dev->dev,
+ "One or more correctable error\n");
+ if (val & MEMERR_L2C_L2ESR_MULTICERR_MASK)
+ dev_err(edac_dev->dev, "Multiple correctable error\n");
+ if (val & MEMERR_L2C_L2ESR_UCERR_MASK)
+ dev_err(edac_dev->dev,
+ "One or more uncorrectable error\n");
+ if (val & MEMERR_L2C_L2ESR_MULTUCERR_MASK)
+ dev_err(edac_dev->dev,
+ "Multiple uncorrectable error\n");
+
+ switch (MEMERR_L2C_L2ESR_ERRTYPE_RD(val)) {
+ case 0:
+ dev_err(edac_dev->dev, "Outbound SDB parity error\n");
+ break;
+ case 1:
+ dev_err(edac_dev->dev, "Inbound SDB parity error\n");
+ break;
+ case 2:
+ dev_err(edac_dev->dev, "Tag ECC error\n");
+ break;
+ case 3:
+ dev_err(edac_dev->dev, "Data ECC error\n");
+ break;
+ }
+
+ /* Clear any HW errors */
+ writel(val, pg_e + MEMERR_L2C_L2ESR_PAGE_OFFSET);
+
+ if (val & (MEMERR_L2C_L2ESR_ERR_MASK |
+ MEMERR_L2C_L2ESR_MULTICERR_MASK))
+ edac_device_handle_ce(edac_dev, 0, 0,
+ edac_dev->ctl_name);
+ if (val & (MEMERR_L2C_L2ESR_UCERR_MASK |
+ MEMERR_L2C_L2ESR_MULTUCERR_MASK))
+ edac_device_handle_ue(edac_dev, 0, 0,
+ edac_dev->ctl_name);
+ }
+
+ /* Check if any memory request timed out on L2 cache */
+ pg_d = ctx->pmd_csr + CPU_L2C_PAGE;
+ val = readl(pg_d + CPUX_L2C_L2RTOSR_PAGE_OFFSET);
+ if (val) {
+ val_lo = readl(pg_d + CPUX_L2C_L2RTOALR_PAGE_OFFSET);
+ val_hi = readl(pg_d + CPUX_L2C_L2RTOAHR_PAGE_OFFSET);
+ dev_err(edac_dev->dev,
+ "PMD%d L2C error L2C RTOSR 0x%08X @ 0x%08X.%08X\n",
+ ctx->pmd, val, val_hi, val_lo);
+ writel(val, pg_d + CPUX_L2C_L2RTOSR_PAGE_OFFSET);
+ }
+}
+
+static void xgene_edac_pmd_check(struct edac_device_ctl_info *edac_dev)
+{
+ struct xgene_edac_pmd_ctx *ctx = edac_dev->pvt_info;
+ unsigned int pcp_hp_stat;
+ int i;
+
+ if (regmap_read(ctx->pcp_map, PCPHPERRINTSTS, &pcp_hp_stat))
+ return;
+ if (!((PMD0_MERR_MASK << ctx->pmd) & pcp_hp_stat))
+ return;
+
+ /* Check CPU L1 error */
+ for (i = 0; i < MAX_CPU_PER_PMD; i++)
+ xgene_edac_pmd_l1_check(edac_dev, i);
+
+ /* Check CPU L2 error */
+ xgene_edac_pmd_l2_check(edac_dev);
+}
+
+static irqreturn_t xgene_edac_pmd_isr(int irq, void *dev_id)
+{
+ struct edac_device_ctl_info *edac_dev = dev_id;
+ struct xgene_edac_pmd_ctx *ctx = edac_dev->pvt_info;
+ unsigned int pcp_hp_stat;
+
+ if (regmap_read(ctx->pcp_map, PCPHPERRINTSTS, &pcp_hp_stat))
+ return IRQ_NONE;
+ if (!((PMD0_MERR_MASK << ctx->pmd) & pcp_hp_stat))
+ return IRQ_NONE;
+
+ xgene_edac_pmd_check(edac_dev);
+
+ return IRQ_HANDLED;
+}
+
+static void xgene_edac_pmd_cpu_hw_cfg(struct edac_device_ctl_info *edac_dev,
+ int cpu)
+{
+ struct xgene_edac_pmd_ctx *ctx = edac_dev->pvt_info;
+ void __iomem *pg_f = ctx->pmd_csr + cpu * CPU_CSR_STRIDE +
+ CPU_MEMERR_CPU_PAGE;
+
+ /*
+ * Enable CPU memory error:
+ * MEMERR_CPU_ICFESRA, MEMERR_CPU_LSUESRA, and MEMERR_CPU_MMUESRA
+ */
+ writel(0x00000301, pg_f + MEMERR_CPU_ICFECR_PAGE_OFFSET);
+ writel(0x00000301, pg_f + MEMERR_CPU_LSUECR_PAGE_OFFSET);
+ writel(0x00000101, pg_f + MEMERR_CPU_MMUECR_PAGE_OFFSET);
+}
+
+static bool xgene_edac_pmd_l2c_version1(void)
+{
+ /* Check all chips with PMD L2C version 1 HW */
+ #define REVIDR_MINOR_REV(revidr) ((revidr) & 0x00000007)
+
+ switch (MIDR_VARIANT(read_cpuid_id())) {
+ case 0:
+ switch (MIDR_REVISION(read_cpuid_id())) {
+ case 0:
+
+ switch (REVIDR_MINOR_REV(read_cpuid(REVIDR_EL1))) {
+ case 1:
+ case 2:
+ return true;
+ };
+ break;
+ case 1:
+ if (REVIDR_MINOR_REV(read_cpuid(REVIDR_EL1)) == 1)
+ return true;
+ break;
+ }
+ break;
+ case 1:
+ switch (MIDR_REVISION(read_cpuid_id())) {
+ case 0:
+ switch (REVIDR_MINOR_REV(read_cpuid(REVIDR_EL1))) {
+ case 1:
+ return true;
+ };
+ break;
+ case 1:
+ switch (REVIDR_MINOR_REV(read_cpuid(REVIDR_EL1))) {
+ case 1:
+ case 0:
+ return true;
+ };
+ break;
+ }
+ break;
+ }
+
+ return false;
+}
+
+static void xgene_edac_pmd_hw_cfg(struct edac_device_ctl_info *edac_dev)
+{
+ struct xgene_edac_pmd_ctx *ctx = edac_dev->pvt_info;
+ void __iomem *pg_d = ctx->pmd_csr + CPU_L2C_PAGE;
+ void __iomem *pg_e = ctx->pmd_csr + CPU_MEMERR_L2C_PAGE;
+
+ /* Enable PMD memory error - MEMERR_L2C_L2ECR and L2C_L2RTOCR */
+ writel(0x00000703, pg_e + MEMERR_L2C_L2ECR_PAGE_OFFSET);
+ /* Configure L2C HW request time out feature if supported */
+ if (!xgene_edac_pmd_l2c_version1())
+ writel(0x00000119, pg_d + CPUX_L2C_L2RTOCR_PAGE_OFFSET);
+}
+
+static void xgene_edac_pmd_hw_ctl(struct edac_device_ctl_info *edac_dev,
+ bool enable)
+{
+ struct xgene_edac_pmd_ctx *ctx = edac_dev->pvt_info;
+ unsigned int val;
+ int i;
+
+ /* Enable PMD error interrupt */
+ if (edac_dev->op_state == OP_RUNNING_INTERRUPT) {
+ mutex_lock(&xgene_edac_lock);
+
+ if (regmap_read(ctx->pcp_map, PCPHPERRINTMSK, &val))
+ goto err;
+ if (enable)
+ val &= ~(PMD0_MERR_MASK << ctx->pmd);
+ else
+ val |= PMD0_MERR_MASK << ctx->pmd;
+ if (regmap_write(ctx->pcp_map, PCPHPERRINTMSK, val))
+ goto err;
+
+err:
+ mutex_unlock(&xgene_edac_lock);
+ }
+
+ if (enable) {
+ xgene_edac_pmd_hw_cfg(edac_dev);
+
+ /* Two CPUs per a PMD */
+ for (i = 0; i < MAX_CPU_PER_PMD; i++)
+ xgene_edac_pmd_cpu_hw_cfg(edac_dev, i);
+ }
+}
+
+#ifdef CONFIG_EDAC_DEBUG
+static ssize_t xgene_edac_pmd_l1_inject_ctrl_write(struct file *file,
+ const char __user *data,
+ size_t count, loff_t *ppos)
+{
+ struct edac_device_ctl_info *edac_dev = file->private_data;
+ struct xgene_edac_pmd_ctx *ctx = edac_dev->pvt_info;
+ void __iomem *cpux_pg_f;
+ int i;
+
+ for (i = 0; i < MAX_CPU_PER_PMD; i++) {
+ cpux_pg_f = ctx->pmd_csr + i * CPU_CSR_STRIDE +
+ CPU_MEMERR_CPU_PAGE;
+
+ writel(MEMERR_CPU_ICFESR_MULTCERR_MASK |
+ MEMERR_CPU_ICFESR_CERR_MASK,
+ cpux_pg_f + MEMERR_CPU_ICFESRA_PAGE_OFFSET);
+ writel(MEMERR_CPU_LSUESR_MULTCERR_MASK |
+ MEMERR_CPU_LSUESR_CERR_MASK,
+ cpux_pg_f + MEMERR_CPU_LSUESRA_PAGE_OFFSET);
+ writel(MEMERR_CPU_MMUESR_MULTCERR_MASK |
+ MEMERR_CPU_MMUESR_CERR_MASK,
+ cpux_pg_f + MEMERR_CPU_MMUESRA_PAGE_OFFSET);
+ }
+ return count;
+}
+
+static ssize_t xgene_edac_pmd_l2_inject_ctrl_write(struct file *file,
+ const char __user *data,
+ size_t count, loff_t *ppos)
+{
+ struct edac_device_ctl_info *edac_dev = file->private_data;
+ struct xgene_edac_pmd_ctx *ctx = edac_dev->pvt_info;
+ void __iomem *pg_e = ctx->pmd_csr + CPU_MEMERR_L2C_PAGE;
+
+ writel(MEMERR_L2C_L2ESR_MULTUCERR_MASK |
+ MEMERR_L2C_L2ESR_MULTICERR_MASK |
+ MEMERR_L2C_L2ESR_UCERR_MASK |
+ MEMERR_L2C_L2ESR_ERR_MASK,
+ pg_e + MEMERR_L2C_L2ESRA_PAGE_OFFSET);
+ return count;
+}
+
+static const struct file_operations xgene_edac_pmd_debug_inject_fops[] = {
+ {
+ .open = simple_open,
+ .write = xgene_edac_pmd_l1_inject_ctrl_write,
+ .llseek = generic_file_llseek, },
+ {
+ .open = simple_open,
+ .write = xgene_edac_pmd_l2_inject_ctrl_write,
+ .llseek = generic_file_llseek, },
+ { }
+};
+
+static void xgene_edac_pmd_create_debugfs_nodes(
+ struct edac_device_ctl_info *edac_dev)
+{
+ struct dentry *edac_debugfs;
+
+ /*
+ * Todo: Switch to common EDAC debug file system for edac device
+ * when available.
+ */
+ edac_debugfs = debugfs_create_dir(edac_dev->dev->kobj.name, NULL);
+ if (!edac_debugfs)
+ return;
+
+ debugfs_create_file("l1_inject_ctrl", S_IWUSR, edac_debugfs, edac_dev,
+ &xgene_edac_pmd_debug_inject_fops[0]);
+ debugfs_create_file("l2_inject_ctrl", S_IWUSR, edac_debugfs, edac_dev,
+ &xgene_edac_pmd_debug_inject_fops[1]);
+}
+#else
+static void xgene_edac_pmd_create_debugfs_nodes(
+ struct edac_device_ctl_info *edac_dev)
+{
+}
+#endif
+
+static int xgene_edac_pmd_available(u32 efuse, int pmd)
+{
+ return (efuse & (1 << pmd)) ? 0 : 1;
+}
+
+static int xgene_edac_pmd_probe(struct platform_device *pdev)
+{
+ struct edac_device_ctl_info *edac_dev;
+ struct xgene_edac_pmd_ctx *ctx;
+ char edac_name[10];
+ struct resource *res;
+ struct regmap *efuse_map;
+ int pmd;
+ int rc = 0;
+ u32 val;
+
+ if (!devres_open_group(&pdev->dev, xgene_edac_pmd_probe, GFP_KERNEL))
+ return -ENOMEM;
+
+ /* Find the PMD number from its address */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res || resource_size(res) <= 0) {
+ rc = -ENODEV;
+ goto err_group;
+ }
+ pmd = ((res->start >> 20) & 0x1E) >> 1;
+
+ /* Determine if this PMD is disabled */
+ efuse_map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
+ "regmap-efuse");
+ if (IS_ERR(efuse_map)) {
+ dev_err(&pdev->dev, "unable to get syscon regmap efuse\n");
+ rc = PTR_ERR(efuse_map);
+ goto err_group;
+ }
+ if ((rc = regmap_read(efuse_map, 0, &val)))
+ goto err_group;
+ if (!xgene_edac_pmd_available(val, pmd)) {
+ rc = -ENODEV;
+ goto err_group;
+ }
+
+ sprintf(edac_name, "l2c%d", pmd);
+ edac_dev = edac_device_alloc_ctl_info(sizeof(*ctx),
+ edac_name, 1, "l2c", 1, 2, NULL,
+ 0, edac_device_alloc_index());
+ if (!edac_dev) {
+ rc = -ENOMEM;
+ goto err_group;
+ }
+
+ ctx = edac_dev->pvt_info;
+ ctx->name = "xgene_pmd_err";
+ ctx->pmd = pmd;
+ edac_dev->dev = &pdev->dev;
+ dev_set_drvdata(edac_dev->dev, edac_dev);
+ edac_dev->ctl_name = ctx->name;
+ edac_dev->dev_name = ctx->name;
+ edac_dev->mod_name = EDAC_MOD_STR;
+
+ ctx->pcp_map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
+ "regmap-pcp");
+ if (IS_ERR(ctx->pcp_map)) {
+ dev_err(&pdev->dev, "unable to get syscon pcp map\n");
+ rc = PTR_ERR(ctx->pcp_map);
+ goto err_free;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ ctx->pmd_csr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(ctx->pmd_csr)) {
+ dev_err(&pdev->dev,
+ "devm_ioremap failed for PMD resource address\n");
+ rc = PTR_ERR(ctx->pmd_csr);
+ goto err_free;
+ }
+
+ if (edac_op_state == EDAC_OPSTATE_POLL)
+ edac_dev->edac_check = xgene_edac_pmd_check;
+
+ xgene_edac_pmd_create_debugfs_nodes(edac_dev);
+
+ rc = edac_device_add_device(edac_dev);
+ if (rc > 0) {
+ dev_err(&pdev->dev, "edac_device_add_device failed\n");
+ rc = -ENOMEM;
+ goto err_free;
+ }
+
+ if (edac_op_state == EDAC_OPSTATE_INT) {
+ int irq = platform_get_irq(pdev, 0);
+
+ if (irq < 0) {
+ dev_err(&pdev->dev, "No IRQ resource\n");
+ rc = -EINVAL;
+ goto err_del;
+ }
+ rc = devm_request_irq(&pdev->dev, irq,
+ xgene_edac_pmd_isr, IRQF_SHARED,
+ dev_name(&pdev->dev), edac_dev);
+ if (rc) {
+ dev_err(&pdev->dev, "Could not request IRQ %d\n", irq);
+ goto err_del;
+ }
+ edac_dev->op_state = OP_RUNNING_INTERRUPT;
+ }
+
+ xgene_edac_pmd_hw_ctl(edac_dev, 1);
+
+ devres_remove_group(&pdev->dev, xgene_edac_pmd_probe);
+
+ dev_info(&pdev->dev, "X-Gene EDAC PMD registered\n");
+ return 0;
+
+err_del:
+ edac_device_del_device(&pdev->dev);
+err_free:
+ edac_device_free_ctl_info(edac_dev);
+err_group:
+ devres_release_group(&pdev->dev, xgene_edac_pmd_probe);
+ return rc;
+}
+
+static int xgene_edac_pmd_remove(struct platform_device *pdev)
+{
+ struct edac_device_ctl_info *edac_dev = dev_get_drvdata(&pdev->dev);
+
+ xgene_edac_pmd_hw_ctl(edac_dev, 0);
+ edac_device_del_device(&pdev->dev);
+ edac_device_free_ctl_info(edac_dev);
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static struct of_device_id xgene_edac_pmd_of_match[] = {
+ { .compatible = "apm,xgene-edac-pmd" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, xgene_edac_pmd_of_match);
+#endif
+
+static struct platform_driver xgene_edac_pmd_driver = {
+ .probe = xgene_edac_pmd_probe,
+ .remove = xgene_edac_pmd_remove,
+ .driver = {
+ .name = "xgene-edac-pmd",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(xgene_edac_pmd_of_match),
+ },
+};
+
+/* L3 Error device */
+#define L3C_ESR (0x0A * 4)
+#define L3C_ESR_DATATAG_MASK BIT(9)
+#define L3C_ESR_MULTIHIT_MASK BIT(8)
+#define L3C_ESR_UCEVICT_MASK BIT(6)
+#define L3C_ESR_MULTIUCERR_MASK BIT(5)
+#define L3C_ESR_MULTICERR_MASK BIT(4)
+#define L3C_ESR_UCERR_MASK BIT(3)
+#define L3C_ESR_CERR_MASK BIT(2)
+#define L3C_ESR_UCERRINTR_MASK BIT(1)
+#define L3C_ESR_CERRINTR_MASK BIT(0)
+#define L3C_ECR (0x0B * 4)
+#define L3C_ECR_UCINTREN BIT(3)
+#define L3C_ECR_CINTREN BIT(2)
+#define L3C_UCERREN BIT(1)
+#define L3C_CERREN BIT(0)
+#define L3C_ELR (0x0C * 4)
+#define L3C_ELR_ERRSYN(src) ((src & 0xFF800000) >> 23)
+#define L3C_ELR_ERRWAY(src) ((src & 0x007E0000) >> 17)
+#define L3C_ELR_AGENTID(src) ((src & 0x0001E000) >> 13)
+#define L3C_ELR_ERRGRP(src) ((src & 0x00000F00) >> 8)
+#define L3C_ELR_OPTYPE(src) ((src & 0x000000F0) >> 4)
+#define L3C_ELR_PADDRHIGH(src) (src & 0x0000000F)
+#define L3C_AELR (0x0D * 4)
+#define L3C_BELR (0x0E * 4)
+#define L3C_BELR_BANK(src) (src & 0x0000000F)
+
+struct xgene_edac_dev_ctx {
+ char *name;
+ int edac_idx;
+ struct regmap *pcp_map;
+ void __iomem *dev_csr;
+ void __iomem *bus_csr;
+};
+
+static bool xgene_edac_l3_version1(void)
+{
+ return MIDR_VARIANT(read_cpuid_id()) == 0 ? true : false;
+}
+
+static void xgene_edac_l3_check(struct edac_device_ctl_info *edac_dev)
+{
+ struct xgene_edac_dev_ctx *ctx = edac_dev->pvt_info;
+ u32 l3cesr;
+ u32 l3celr;
+ u32 l3caelr;
+ u32 l3cbelr;
+
+ l3cesr = readl(ctx->dev_csr + L3C_ESR);
+ if (!(l3cesr & (L3C_ESR_UCERR_MASK | L3C_ESR_CERR_MASK)))
+ return;
+
+ if (l3cesr & L3C_ESR_UCERR_MASK)
+ dev_err(edac_dev->dev, "L3C uncorrectable error\n");
+ if (l3cesr & L3C_ESR_CERR_MASK)
+ dev_warn(edac_dev->dev, "L3C correctable error\n");
+
+ l3celr = readl(ctx->dev_csr + L3C_ELR);
+ l3caelr = readl(ctx->dev_csr + L3C_AELR);
+ l3cbelr = readl(ctx->dev_csr + L3C_BELR);
+ if (l3cesr & L3C_ESR_MULTIHIT_MASK)
+ dev_err(edac_dev->dev, "L3C multiple hit error\n");
+ if (l3cesr & L3C_ESR_UCEVICT_MASK)
+ dev_err(edac_dev->dev,
+ "L3C dropped eviction of line with error\n");
+ if (l3cesr & L3C_ESR_MULTIUCERR_MASK)
+ dev_err(edac_dev->dev, "L3C multiple uncorrectable error\n");
+ if (l3cesr & L3C_ESR_DATATAG_MASK) {
+ if (!xgene_edac_l3_version1()) {
+ dev_err(edac_dev->dev, "L3C data error\n");
+ goto no_tag_syndrome;
+ }
+ dev_err(edac_dev->dev,
+ "L3C data error syndrome 0x%X group 0x%X\n",
+ L3C_ELR_ERRSYN(l3celr), L3C_ELR_ERRGRP(l3celr));
+ } else {
+ dev_err(edac_dev->dev,
+ "L3C tag error syndrome 0x%X Way of Tag 0x%X Agent ID 0x%X Operation type 0x%X\n",
+ L3C_ELR_ERRSYN(l3celr), L3C_ELR_ERRWAY(l3celr),
+ L3C_ELR_AGENTID(l3celr), L3C_ELR_OPTYPE(l3celr));
+ }
+
+ /*
+ * NOTE: Address [41:38] in L3C_ELR_PADDRHIGH(l3celr).
+ * Address [37:6] in l3caelr. Lower 6 bits are zero.
+ */
+ dev_err(edac_dev->dev, "L3C error address 0x%08X.%08X bank %d\n",
+ L3C_ELR_PADDRHIGH(l3celr) << 6 | (l3caelr >> 26),
+ (l3caelr & 0x3FFFFFFF) << 6, L3C_BELR_BANK(l3cbelr));
+no_tag_syndrome:
+ dev_err(edac_dev->dev,
+ "L3C error status register value 0x%X\n", l3cesr);
+
+ /* Clear L3C error interrupt */
+ writel(0, ctx->dev_csr + L3C_ESR);
+
+ if (l3cesr & L3C_ESR_CERR_MASK)
+ edac_device_handle_ce(edac_dev, 0, 0, edac_dev->ctl_name);
+ if (l3cesr & L3C_ESR_UCERR_MASK)
+ edac_device_handle_ue(edac_dev, 0, 0, edac_dev->ctl_name);
+}
+
+static irqreturn_t xgene_edac_l3_isr(int irq, void *dev_id)
+{
+ struct edac_device_ctl_info *edac_dev = dev_id;
+ struct xgene_edac_dev_ctx *ctx = edac_dev->pvt_info;
+ u32 l3cesr;
+
+ l3cesr = readl(ctx->dev_csr + L3C_ESR);
+ if (!(l3cesr & (L3C_ESR_UCERRINTR_MASK | L3C_ESR_CERRINTR_MASK)))
+ return IRQ_NONE;
+
+ xgene_edac_l3_check(edac_dev);
+
+ return IRQ_HANDLED;
+}
+
+static void xgene_edac_l3_hw_ctl(struct edac_device_ctl_info *edac_dev,
+ bool enable)
+{
+ struct xgene_edac_dev_ctx *ctx = edac_dev->pvt_info;
+ u32 val;
+
+ val = readl(ctx->dev_csr + L3C_ECR);
+ val |= L3C_UCERREN | L3C_CERREN;
+ /* On disable, we just disable interrupt but keep error enabled */
+ if (edac_dev->op_state == OP_RUNNING_INTERRUPT) {
+ if (enable)
+ val |= L3C_ECR_UCINTREN | L3C_ECR_CINTREN;
+ else
+ val &= ~(L3C_ECR_UCINTREN | L3C_ECR_CINTREN);
+ }
+ writel(val, ctx->dev_csr + L3C_ECR);
+
+ mutex_lock(&xgene_edac_lock);
+
+ if (edac_dev->op_state == OP_RUNNING_INTERRUPT) {
+ /* Enable L3C error top level interrupt */
+ if (regmap_read(ctx->pcp_map, PCPHPERRINTMSK, &val))
+ goto err;
+ if (enable)
+ val &= ~L3C_UNCORR_ERR_MASK;
+ else
+ val |= L3C_UNCORR_ERR_MASK;
+ if (regmap_write(ctx->pcp_map, PCPHPERRINTMSK, val))
+ goto err;
+ if (regmap_read(ctx->pcp_map, PCPLPERRINTMSK, &val))
+ goto err;
+ if (enable)
+ val &= ~L3C_CORR_ERR_MASK;
+ else
+ val |= L3C_CORR_ERR_MASK;
+ if (regmap_write(ctx->pcp_map, PCPLPERRINTMSK, val))
+ goto err;
+ }
+
+err:
+ mutex_unlock(&xgene_edac_lock);
+}
+
+#ifdef CONFIG_EDAC_DEBUG
+static ssize_t xgene_edac_l3_inject_ctrl_write(struct file *file,
+ const char __user *data,
+ size_t count, loff_t *ppos)
+{
+ struct edac_device_ctl_info *edac_dev = file->private_data;
+ struct xgene_edac_dev_ctx *ctx = edac_dev->pvt_info;
+
+ writel(L3C_ESR_UCERR_MASK | L3C_ESR_CERR_MASK |
+ L3C_ESR_MULTIUCERR_MASK | L3C_ESR_MULTICERR_MASK,
+ ctx->dev_csr + L3C_ESR);
+ return count;
+}
+
+static const struct file_operations xgene_edac_l3_debug_inject_fops = {
+ .open = simple_open,
+ .write = xgene_edac_l3_inject_ctrl_write,
+ .llseek = generic_file_llseek,
+};
+
+static void xgene_edac_l3_create_debugfs_node(
+ struct edac_device_ctl_info *edac_dev)
+{
+ struct dentry *edac_debugfs;
+
+ /*
+ * Todo: Switch to common EDAC debug file system for edac device
+ * when available.
+ */
+ edac_debugfs = debugfs_create_dir(edac_dev->dev->kobj.name, NULL);
+ if (!edac_debugfs)
+ return;
+
+ debugfs_create_file("inject_ctrl", S_IWUSR, edac_debugfs, edac_dev,
+ &xgene_edac_l3_debug_inject_fops);
+}
+#else
+static void xgene_edac_l3_create_debugfs_node(
+ struct edac_device_ctl_info *edac_dev)
+{
+}
+#endif
+
+static int xgene_edac_l3_probe(struct platform_device *pdev)
+{
+ struct edac_device_ctl_info *edac_dev;
+ struct xgene_edac_dev_ctx *ctx;
+ struct resource *res;
+ int rc = 0;
+
+ if (!devres_open_group(&pdev->dev, xgene_edac_l3_probe, GFP_KERNEL))
+ return -ENOMEM;
+
+ edac_dev = edac_device_alloc_ctl_info(sizeof(*ctx),
+ "l3c", 1, "l3c", 1, 0, NULL, 0,
+ edac_device_alloc_index());
+ if (!edac_dev) {
+ rc = -ENOMEM;
+ goto err;
+ }
+
+ ctx = edac_dev->pvt_info;
+ ctx->name = "xgene_l3_err";
+ edac_dev->dev = &pdev->dev;
+ dev_set_drvdata(edac_dev->dev, edac_dev);
+ edac_dev->ctl_name = ctx->name;
+ edac_dev->dev_name = ctx->name;
+ edac_dev->mod_name = EDAC_MOD_STR;
+
+ ctx->pcp_map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
+ "regmap-pcp");
+ if (IS_ERR(ctx->pcp_map)) {
+ dev_err(&pdev->dev, "unable to get syscon regmap pcp\n");
+ rc = PTR_ERR(ctx->pcp_map);
+ goto err1;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ ctx->dev_csr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(ctx->dev_csr)) {
+ dev_err(&pdev->dev, "no L3 resource address\n");
+ rc = PTR_ERR(ctx->dev_csr);
+ goto err1;
+ }
+
+ if (edac_op_state == EDAC_OPSTATE_POLL)
+ edac_dev->edac_check = xgene_edac_l3_check;
+
+ xgene_edac_l3_create_debugfs_node(edac_dev);
+
+ rc = edac_device_add_device(edac_dev);
+ if (rc > 0) {
+ dev_err(&pdev->dev, "edac_device_add_device failed\n");
+ rc = -ENOMEM;
+ goto err1;
+ }
+
+ if (edac_op_state == EDAC_OPSTATE_INT) {
+ int irq;
+ int i;
+
+ for (i = 0; i < 2; i++) {
+ irq = platform_get_irq(pdev, i);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "No IRQ resource\n");
+ rc = -EINVAL;
+ goto err2;
+ }
+ rc = devm_request_irq(&pdev->dev, irq,
+ xgene_edac_l3_isr, IRQF_SHARED,
+ dev_name(&pdev->dev), edac_dev);
+ if (rc) {
+ dev_err(&pdev->dev,
+ "Could not request IRQ %d\n", irq);
+ goto err2;
+ }
+ }
+ edac_dev->op_state = OP_RUNNING_INTERRUPT;
+ }
+
+ xgene_edac_l3_hw_ctl(edac_dev, true);
+
+ devres_remove_group(&pdev->dev, xgene_edac_l3_probe);
+
+ dev_info(&pdev->dev, "X-Gene EDAC L3 registered\n");
+ return 0;
+
+err2:
+ edac_device_del_device(&pdev->dev);
+err1:
+ edac_device_free_ctl_info(edac_dev);
+err:
+ devres_release_group(&pdev->dev, xgene_edac_l3_probe);
+ return rc;
+}
+
+static int xgene_edac_l3_remove(struct platform_device *pdev)
+{
+ struct edac_device_ctl_info *edac_dev = dev_get_drvdata(&pdev->dev);
+
+ xgene_edac_l3_hw_ctl(edac_dev, false);
+ edac_device_del_device(&pdev->dev);
+ edac_device_free_ctl_info(edac_dev);
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static struct of_device_id xgene_edac_l3_of_match[] = {
+ { .compatible = "apm,xgene-edac-l3" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, xgene_edac_l3_of_match);
+#endif
+
+static struct platform_driver xgene_edac_l3_driver = {
+ .probe = xgene_edac_l3_probe,
+ .remove = xgene_edac_l3_remove,
+ .driver = {
+ .name = "xgene-edac-l3",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(xgene_edac_l3_of_match),
+ },
+};
+
+/* SoC Error device */
+#define IOBAXIS0TRANSERRINTSTS 0x0000
+#define IOBAXIS0_M_ILLEGAL_ACCESS_MASK BIT(1)
+#define IOBAXIS0_ILLEGAL_ACCESS_MASK BIT(0)
+#define IOBAXIS0TRANSERRINTMSK 0x0004
+#define IOBAXIS0TRANSERRREQINFOL 0x0008
+#define IOBAXIS0TRANSERRREQINFOH 0x000c
+#define REQTYPE_RD(src) (((src) & BIT(0)))
+#define ERRADDRH_RD(src) (((src) & 0xffc00000) >> 22)
+#define IOBAXIS1TRANSERRINTSTS 0x0010
+#define IOBAXIS1TRANSERRINTMSK 0x0014
+#define IOBAXIS1TRANSERRREQINFOL 0x0018
+#define IOBAXIS1TRANSERRREQINFOH 0x001c
+#define IOBPATRANSERRINTSTS 0x0020
+#define IOBPA_M_REQIDRAM_CORRUPT_MASK BIT(7)
+#define IOBPA_REQIDRAM_CORRUPT_MASK BIT(6)
+#define IOBPA_M_TRANS_CORRUPT_MASK BIT(5)
+#define IOBPA_TRANS_CORRUPT_MASK BIT(4)
+#define IOBPA_M_WDATA_CORRUPT_MASK BIT(3)
+#define IOBPA_WDATA_CORRUPT_MASK BIT(2)
+#define IOBPA_M_RDATA_CORRUPT_MASK BIT(1)
+#define IOBPA_RDATA_CORRUPT_MASK BIT(0)
+#define IOBBATRANSERRINTSTS 0x0030
+#define M_ILLEGAL_ACCESS_MASK 0x00008000
+#define ILLEGAL_ACCESS_MASK 0x00004000
+#define M_WIDRAM_CORRUPT_MASK 0x00002000
+#define WIDRAM_CORRUPT_MASK BIT(12)
+#define M_RIDRAM_CORRUPT_MASK BIT(11)
+#define RIDRAM_CORRUPT_MASK BIT(10)
+#define M_TRANS_CORRUPT_MASK BIT(9)
+#define TRANS_CORRUPT_MASK BIT(8)
+#define M_WDATA_CORRUPT_MASK BIT(7)
+#define WDATA_CORRUPT_MASK BIT(6)
+#define M_RBM_POISONED_REQ_MASK BIT(5)
+#define RBM_POISONED_REQ_MASK BIT(4)
+#define M_XGIC_POISONED_REQ_MASK BIT(3)
+#define XGIC_POISONED_REQ_MASK BIT(2)
+#define M_WRERR_RESP_MASK BIT(1)
+#define WRERR_RESP_MASK BIT(0)
+#define IOBBATRANSERRREQINFOL 0x0038
+#define IOBBATRANSERRREQINFOH 0x003c
+#define REQTYPE_F2_RD(src) (((src) & BIT(0)))
+#define ERRADDRH_F2_RD(src) (((src) & 0xffc00000) >> 22)
+#define IOBBATRANSERRCSWREQID 0x0040
+#define XGICTRANSERRINTSTS 0x0050
+#define M_WR_ACCESS_ERR_MASK BIT(3)
+#define WR_ACCESS_ERR_MASK BIT(2)
+#define M_RD_ACCESS_ERR_MASK BIT(1)
+#define RD_ACCESS_ERR_MASK BIT(0)
+#define XGICTRANSERRINTMSK 0x0054
+#define XGICTRANSERRREQINFO 0x0058
+#define REQTYPE_MASK 0x04000000
+#define ERRADDR_RD(src) ((src) & 0x03ffffff)
+#define GLBL_ERR_STS 0x0800
+#define MDED_ERR_MASK BIT(3)
+#define DED_ERR_MASK BIT(2)
+#define MSEC_ERR_MASK BIT(1)
+#define SEC_ERR_MASK BIT(0)
+#define GLBL_SEC_ERRL 0x0810
+#define GLBL_SEC_ERRH 0x0818
+#define GLBL_MSEC_ERRL 0x0820
+#define GLBL_MSEC_ERRH 0x0828
+#define GLBL_DED_ERRL 0x0830
+#define GLBL_DED_ERRLMASK 0x0834
+#define GLBL_DED_ERRH 0x0838
+#define GLBL_DED_ERRHMASK 0x083c
+#define GLBL_MDED_ERRL 0x0840
+#define GLBL_MDED_ERRLMASK 0x0844
+#define GLBL_MDED_ERRH 0x0848
+#define GLBL_MDED_ERRHMASK 0x084c
+
+/* IO Bus Registers */
+#define RBCSR 0x0000
+#define STICKYERR_MASK BIT(0)
+#define RBEIR 0x0008
+#define AGENT_OFFLINE_ERR_MASK BIT(30)
+#define UNIMPL_RBPAGE_ERR_MASK BIT(29)
+#define WORD_ALIGNED_ERR_MASK BIT(28)
+#define PAGE_ACCESS_ERR_MASK BIT(27)
+#define WRITE_ACCESS_MASK BIT(26)
+#define RBERRADDR_RD(src) ((src) & 0x03FFFFFF)
+
+static void xgene_edac_iob_gic_report(struct edac_device_ctl_info *edac_dev)
+{
+ struct xgene_edac_dev_ctx *ctx = edac_dev->pvt_info;
+ u32 err_addr_lo;
+ u32 err_addr_hi;
+ u32 reg;
+ u32 info;
+
+ /* GIC transaction error interrupt */
+ reg = readl(ctx->dev_csr + XGICTRANSERRINTSTS);
+ if (reg) {
+ dev_err(edac_dev->dev, "XGIC transaction error\n");
+ if (reg & RD_ACCESS_ERR_MASK)
+ dev_err(edac_dev->dev, "XGIC read size error\n");
+ if (reg & M_RD_ACCESS_ERR_MASK)
+ dev_err(edac_dev->dev,
+ "Multiple XGIC read size error\n");
+ if (reg & WR_ACCESS_ERR_MASK)
+ dev_err(edac_dev->dev, "XGIC write size error\n");
+ if (reg & M_WR_ACCESS_ERR_MASK)
+ dev_err(edac_dev->dev,
+ "Multiple XGIC write size error\n");
+ info = readl(ctx->dev_csr + XGICTRANSERRREQINFO);
+ dev_err(edac_dev->dev, "XGIC %s access @ 0x%08X (0x%08X)\n",
+ info & REQTYPE_MASK ? "read" : "write",
+ ERRADDR_RD(info), info);
+ writel(reg, ctx->dev_csr + XGICTRANSERRINTSTS);
+ }
+
+ /* IOB memory error */
+ reg = readl(ctx->dev_csr + GLBL_ERR_STS);
+ if (reg) {
+ if (reg & SEC_ERR_MASK) {
+ err_addr_lo = readl(ctx->dev_csr + GLBL_SEC_ERRL);
+ err_addr_hi = readl(ctx->dev_csr + GLBL_SEC_ERRH);
+ dev_err(edac_dev->dev,
+ "IOB single-bit correctable memory at 0x%08X.%08X error\n",
+ err_addr_lo, err_addr_hi);
+ writel(err_addr_lo, ctx->dev_csr + GLBL_SEC_ERRL);
+ writel(err_addr_hi, ctx->dev_csr + GLBL_SEC_ERRH);
+ }
+ if (reg & MSEC_ERR_MASK) {
+ err_addr_lo = readl(ctx->dev_csr + GLBL_MSEC_ERRL);
+ err_addr_hi = readl(ctx->dev_csr + GLBL_MSEC_ERRH);
+ dev_err(edac_dev->dev,
+ "IOB multiple single-bit correctable memory at 0x%08X.%08X error\n",
+ err_addr_lo, err_addr_hi);
+ writel(err_addr_lo, ctx->dev_csr + GLBL_MSEC_ERRL);
+ writel(err_addr_hi, ctx->dev_csr + GLBL_MSEC_ERRH);
+ }
+ if (reg & (SEC_ERR_MASK | MSEC_ERR_MASK))
+ edac_device_handle_ce(edac_dev, 0, 0,
+ edac_dev->ctl_name);
+
+ if (reg & DED_ERR_MASK) {
+ err_addr_lo = readl(ctx->dev_csr + GLBL_DED_ERRL);
+ err_addr_hi = readl(ctx->dev_csr + GLBL_DED_ERRH);
+ dev_err(edac_dev->dev,
+ "IOB double-bit uncorrectable memory at 0x%08X.%08X error\n",
+ err_addr_lo, err_addr_hi);
+ writel(err_addr_lo, ctx->dev_csr + GLBL_DED_ERRL);
+ writel(err_addr_hi, ctx->dev_csr + GLBL_DED_ERRH);
+ }
+ if (reg & MDED_ERR_MASK) {
+ err_addr_lo = readl(ctx->dev_csr + GLBL_MDED_ERRL);
+ err_addr_hi = readl(ctx->dev_csr + GLBL_MDED_ERRH);
+ dev_err(edac_dev->dev,
+ "Multiple IOB double-bit uncorrectable memory at 0x%08X.%08X error\n",
+ err_addr_lo, err_addr_hi);
+ writel(err_addr_lo, ctx->dev_csr + GLBL_MDED_ERRL);
+ writel(err_addr_hi, ctx->dev_csr + GLBL_MDED_ERRH);
+ }
+ if (reg & (DED_ERR_MASK | MDED_ERR_MASK))
+ edac_device_handle_ue(edac_dev, 0, 0,
+ edac_dev->ctl_name);
+ }
+}
+
+static void xgene_edac_rb_report(struct edac_device_ctl_info *edac_dev)
+{
+ struct xgene_edac_dev_ctx *ctx = edac_dev->pvt_info;
+ u32 err_addr_lo;
+ u32 err_addr_hi;
+ u32 reg;
+
+ /*
+ * Check RB acess errors
+ * 1. Out of range
+ * 2. Un-implemented page
+ * 3. Un-aligned access
+ * 4. Offline slave IP
+ */
+ reg = readl(ctx->bus_csr + RBCSR);
+ if (reg & STICKYERR_MASK) {
+ bool write;
+ u32 address;
+
+ dev_err(edac_dev->dev, "IOB bus access error(s)\n");
+ reg = readl(ctx->bus_csr + RBEIR);
+ write = reg & WRITE_ACCESS_MASK ? 1 : 0;
+ address = RBERRADDR_RD(reg);
+ if (reg & AGENT_OFFLINE_ERR_MASK)
+ dev_err(edac_dev->dev,
+ "IOB bus %s access to offline agent error\n",
+ write ? "write" : "read");
+ if (reg & UNIMPL_RBPAGE_ERR_MASK)
+ dev_err(edac_dev->dev,
+ "IOB bus %s access to unimplemented page error\n",
+ write ? "write" : "read");
+ if (reg & WORD_ALIGNED_ERR_MASK)
+ dev_err(edac_dev->dev,
+ "IOB bus %s word aligned access error\n",
+ write ? "write" : "read");
+ if (reg & PAGE_ACCESS_ERR_MASK)
+ dev_err(edac_dev->dev,
+ "IOB bus %s to page out of range access error\n",
+ write ? "write" : "read");
+ writel(0x0, ctx->bus_csr + RBEIR);
+ writel(0x0, ctx->bus_csr + RBCSR);
+ }
+
+ /* IOB Bridge agent transaction error interrupt */
+ reg = readl(ctx->dev_csr + IOBBATRANSERRINTSTS);
+ if (!reg)
+ return;
+
+ dev_err(edac_dev->dev, "IOB bridge agent (BA) transaction error\n");
+ if (reg & WRERR_RESP_MASK)
+ dev_err(edac_dev->dev, "IOB BA write response error\n");
+ if (reg & M_WRERR_RESP_MASK)
+ dev_err(edac_dev->dev,
+ "Multiple IOB BA write response error\n");
+ if (reg & XGIC_POISONED_REQ_MASK)
+ dev_err(edac_dev->dev, "IOB BA XGIC poisoned write error\n");
+ if (reg & M_XGIC_POISONED_REQ_MASK)
+ dev_err(edac_dev->dev,
+ "Multiple IOB BA XGIC poisoned write error\n");
+ if (reg & RBM_POISONED_REQ_MASK)
+ dev_err(edac_dev->dev, "IOB BA RBM poisoned write error\n");
+ if (reg & M_RBM_POISONED_REQ_MASK)
+ dev_err(edac_dev->dev,
+ "Multiple IOB BA RBM poisoned write error\n");
+ if (reg & WDATA_CORRUPT_MASK)
+ dev_err(edac_dev->dev, "IOB BA write error\n");
+ if (reg & M_WDATA_CORRUPT_MASK)
+ dev_err(edac_dev->dev, "Multiple IOB BA write error\n");
+ if (reg & TRANS_CORRUPT_MASK)
+ dev_err(edac_dev->dev, "IOB BA transaction error\n");
+ if (reg & M_TRANS_CORRUPT_MASK)
+ dev_err(edac_dev->dev, "Multiple IOB BA transaction error\n");
+ if (reg & RIDRAM_CORRUPT_MASK)
+ dev_err(edac_dev->dev,
+ "IOB BA RDIDRAM read transaction ID error\n");
+ if (reg & M_RIDRAM_CORRUPT_MASK)
+ dev_err(edac_dev->dev,
+ "Multiple IOB BA RDIDRAM read transaction ID error\n");
+ if (reg & WIDRAM_CORRUPT_MASK)
+ dev_err(edac_dev->dev,
+ "IOB BA RDIDRAM write transaction ID error\n");
+ if (reg & M_WIDRAM_CORRUPT_MASK)
+ dev_err(edac_dev->dev,
+ "Multiple IOB BA RDIDRAM write transaction ID error\n");
+ if (reg & ILLEGAL_ACCESS_MASK)
+ dev_err(edac_dev->dev,
+ "IOB BA XGIC/RB illegal access error\n");
+ if (reg & M_ILLEGAL_ACCESS_MASK)
+ dev_err(edac_dev->dev,
+ "Multiple IOB BA XGIC/RB illegal access error\n");
+
+ err_addr_lo = readl(ctx->dev_csr + IOBBATRANSERRREQINFOL);
+ err_addr_hi = readl(ctx->dev_csr + IOBBATRANSERRREQINFOH);
+ dev_err(edac_dev->dev, "IOB BA %s access at 0x%02X.%08X (0x%08X)\n",
+ REQTYPE_F2_RD(err_addr_hi) ? "read" : "write",
+ ERRADDRH_F2_RD(err_addr_hi), err_addr_lo, err_addr_hi);
+ if (reg & WRERR_RESP_MASK)
+ dev_err(edac_dev->dev, "IOB BA requestor ID 0x%08X\n",
+ readl(ctx->dev_csr + IOBBATRANSERRCSWREQID));
+ writel(reg, ctx->dev_csr + IOBBATRANSERRINTSTS);
+}
+
+static void xgene_edac_pa_report(struct edac_device_ctl_info *edac_dev)
+{
+ struct xgene_edac_dev_ctx *ctx = edac_dev->pvt_info;
+ u32 err_addr_lo;
+ u32 err_addr_hi;
+ u32 reg;
+
+ /* IOB Processing agent transaction error interrupt */
+ reg = readl(ctx->dev_csr + IOBPATRANSERRINTSTS);
+ if (reg) {
+ dev_err(edac_dev->dev,
+ "IOB procesing agent (PA) transaction error\n");
+ if (reg & IOBPA_RDATA_CORRUPT_MASK)
+ dev_err(edac_dev->dev, "IOB PA read data RAM error\n");
+ if (reg & IOBPA_M_RDATA_CORRUPT_MASK)
+ dev_err(edac_dev->dev,
+ "Mutilple IOB PA read data RAM error\n");
+ if (reg & IOBPA_WDATA_CORRUPT_MASK)
+ dev_err(edac_dev->dev,
+ "IOB PA write data RAM error\n");
+ if (reg & IOBPA_M_WDATA_CORRUPT_MASK)
+ dev_err(edac_dev->dev,
+ "Mutilple IOB PA write data RAM error\n");
+ if (reg & IOBPA_TRANS_CORRUPT_MASK)
+ dev_err(edac_dev->dev, "IOB PA transaction error\n");
+ if (reg & IOBPA_M_TRANS_CORRUPT_MASK)
+ dev_err(edac_dev->dev,
+ "Mutilple IOB PA transaction error\n");
+ if (reg & IOBPA_REQIDRAM_CORRUPT_MASK)
+ dev_err(edac_dev->dev,
+ "IOB PA transaction ID RAM error\n");
+ if (reg & IOBPA_M_REQIDRAM_CORRUPT_MASK)
+ dev_err(edac_dev->dev,
+ "Multiple IOB PA transaction ID RAM error\n");
+ writel(reg, ctx->dev_csr + IOBPATRANSERRINTSTS);
+ }
+
+ /* IOB AXI0 Error */
+ reg = readl(ctx->dev_csr + IOBAXIS0TRANSERRINTSTS);
+ if (reg) {
+ err_addr_lo = readl(ctx->dev_csr + IOBAXIS0TRANSERRREQINFOL);
+ err_addr_hi = readl(ctx->dev_csr + IOBAXIS0TRANSERRREQINFOH);
+ dev_err(edac_dev->dev,
+ "%sAXI slave 0 illegal %s access @ 0x%02X.%08X (0x%08X)\n",
+ reg & IOBAXIS0_M_ILLEGAL_ACCESS_MASK ? "Multiple " : "",
+ REQTYPE_RD(err_addr_hi) ? "read" : "write",
+ ERRADDRH_RD(err_addr_hi), err_addr_lo, err_addr_hi);
+ writel(reg, ctx->dev_csr + IOBAXIS0TRANSERRINTSTS);
+ }
+
+ /* IOB AXI1 Error */
+ reg = readl(ctx->dev_csr + IOBAXIS1TRANSERRINTSTS);
+ if (reg) {
+ err_addr_lo = readl(ctx->dev_csr + IOBAXIS1TRANSERRREQINFOL);
+ err_addr_hi = readl(ctx->dev_csr + IOBAXIS1TRANSERRREQINFOH);
+ dev_err(edac_dev->dev,
+ "%sAXI slave 1 illegal %s access @ 0x%02X.%08X (0x%08X)\n",
+ reg & IOBAXIS0_M_ILLEGAL_ACCESS_MASK ? "Multiple " : "",
+ REQTYPE_RD(err_addr_hi) ? "read" : "write",
+ ERRADDRH_RD(err_addr_hi), err_addr_lo, err_addr_hi);
+ writel(reg, ctx->dev_csr + IOBAXIS1TRANSERRINTSTS);
+ }
+}
+
+static void xgene_edac_soc_check(struct edac_device_ctl_info *edac_dev)
+{
+ struct xgene_edac_dev_ctx *ctx = edac_dev->pvt_info;
+ static const char * const mem_err_ip[] = {
+ "10GbE0",
+ "10GbE1",
+ "Security",
+ "SATA45",
+ "SATA23/ETH23",
+ "SATA01/ETH01",
+ "USB1",
+ "USB0",
+ "QML",
+ "QM0",
+ "QM1 (XGbE01)",
+ "PCIE4",
+ "PCIE3",
+ "PCIE2",
+ "PCIE1",
+ "PCIE0",
+ "CTX Manager",
+ "OCM",
+ "1GbE",
+ "CLE",
+ "AHBC",
+ "PktDMA",
+ "GFC",
+ "MSLIM",
+ "10GbE2",
+ "10GbE3",
+ "QM2 (XGbE23)",
+ "IOB",
+ "unknown",
+ "unknown",
+ "unknown",
+ "unknown",
+ };
+ unsigned int pcp_hp_stat;
+ unsigned int pcp_lp_stat;
+ unsigned int reg;
+ int i;
+
+ if (regmap_read(ctx->pcp_map, PCPHPERRINTSTS, &pcp_hp_stat))
+ return;
+ if (regmap_read(ctx->pcp_map, PCPLPERRINTSTS, &pcp_lp_stat))
+ return;
+ if (regmap_read(ctx->pcp_map, MEMERRINTSTS, &reg))
+ return;
+ if (!((pcp_hp_stat & (IOB_PA_ERR_MASK | IOB_BA_ERR_MASK |
+ IOB_XGIC_ERR_MASK | IOB_RB_ERR_MASK)) ||
+ (pcp_lp_stat & CSW_SWITCH_TRACE_ERR_MASK) || reg))
+ return;
+
+ if (pcp_hp_stat & IOB_XGIC_ERR_MASK)
+ xgene_edac_iob_gic_report(edac_dev);
+
+ if (pcp_hp_stat & (IOB_RB_ERR_MASK | IOB_BA_ERR_MASK))
+ xgene_edac_rb_report(edac_dev);
+
+ if (pcp_hp_stat & IOB_PA_ERR_MASK)
+ xgene_edac_pa_report(edac_dev);
+
+ if (pcp_lp_stat & CSW_SWITCH_TRACE_ERR_MASK) {
+ dev_info(edac_dev->dev,
+ "CSW switch trace correctable memory parity error\n");
+ edac_device_handle_ce(edac_dev, 0, 0, edac_dev->ctl_name);
+ }
+
+ for (i = 0; i < 31; i++) {
+ if (reg & (1 << i)) {
+ dev_err(edac_dev->dev, "%s memory parity error\n",
+ mem_err_ip[i]);
+ edac_device_handle_ue(edac_dev, 0, 0,
+ edac_dev->ctl_name);
+ }
+ }
+}
+
+static irqreturn_t xgene_edac_soc_isr(int irq, void *dev_id)
+{
+ struct edac_device_ctl_info *edac_dev = dev_id;
+ struct xgene_edac_dev_ctx *ctx = edac_dev->pvt_info;
+ unsigned int pcp_hp_stat;
+ unsigned int pcp_lp_stat;
+ unsigned int reg;
+
+ if (regmap_read(ctx->pcp_map, PCPHPERRINTSTS, &pcp_hp_stat))
+ return IRQ_NONE;
+ if (regmap_read(ctx->pcp_map, PCPLPERRINTSTS, &pcp_lp_stat))
+ return IRQ_NONE;
+ if (regmap_read(ctx->pcp_map, MEMERRINTSTS, &reg))
+ return IRQ_NONE;
+ if (!((pcp_hp_stat & (IOB_PA_ERR_MASK | IOB_BA_ERR_MASK |
+ IOB_XGIC_ERR_MASK | IOB_RB_ERR_MASK)) ||
+ (pcp_lp_stat & CSW_SWITCH_TRACE_ERR_MASK) || reg))
+ return IRQ_NONE;
+
+ xgene_edac_soc_check(edac_dev);
+
+ return IRQ_HANDLED;
+}
+
+static void xgene_edac_soc_hw_ctl(struct edac_device_ctl_info *edac_dev,
+ bool enable)
+{
+ struct xgene_edac_dev_ctx *ctx = edac_dev->pvt_info;
+ unsigned int val;
+
+ /* Enable SoC IP error interrupt */
+ if (edac_dev->op_state == OP_RUNNING_INTERRUPT) {
+ mutex_lock(&xgene_edac_lock);
+
+ if (regmap_read(ctx->pcp_map, PCPHPERRINTMSK, &val))
+ goto err;
+ if (enable)
+ val &= ~(IOB_PA_ERR_MASK | IOB_BA_ERR_MASK |
+ IOB_XGIC_ERR_MASK | IOB_RB_ERR_MASK);
+ else
+ val |= IOB_PA_ERR_MASK | IOB_BA_ERR_MASK |
+ IOB_XGIC_ERR_MASK | IOB_RB_ERR_MASK;
+ if (regmap_write(ctx->pcp_map, PCPHPERRINTMSK, val))
+ goto err;
+ if (regmap_read(ctx->pcp_map, PCPLPERRINTMSK, &val))
+ goto err;
+ if (enable)
+ val &= ~CSW_SWITCH_TRACE_ERR_MASK;
+ else
+ val |= CSW_SWITCH_TRACE_ERR_MASK;
+ if (regmap_write(ctx->pcp_map, PCPLPERRINTMSK, val))
+ goto err;
+
+err:
+ mutex_unlock(&xgene_edac_lock);
+
+ writel(enable ? 0x0 : 0xFFFFFFFF,
+ ctx->dev_csr + IOBAXIS0TRANSERRINTMSK);
+ writel(enable ? 0x0 : 0xFFFFFFFF,
+ ctx->dev_csr + IOBAXIS1TRANSERRINTMSK);
+ writel(enable ? 0x0 : 0xFFFFFFFF,
+ ctx->dev_csr + XGICTRANSERRINTMSK);
+
+ regmap_write(ctx->pcp_map, MEMERRINTMSK,
+ enable ? 0x0 : 0xFFFFFFFF);
+ }
+}
+
+static int xgene_edac_soc_probe(struct platform_device *pdev)
+{
+ struct edac_device_ctl_info *edac_dev;
+ struct xgene_edac_dev_ctx *ctx;
+ struct resource *res;
+ int rc = 0;
+
+ if (!devres_open_group(&pdev->dev, xgene_edac_soc_probe, GFP_KERNEL))
+ return -ENOMEM;
+
+ edac_dev = edac_device_alloc_ctl_info(sizeof(*ctx),
+ "SOC", 1, "SOC", 1, 2, NULL, 0,
+ edac_device_alloc_index());
+ if (!edac_dev) {
+ rc = -ENOMEM;
+ goto err;
+ }
+
+ ctx = edac_dev->pvt_info;
+ ctx->name = "xgene_soc_err";
+ edac_dev->dev = &pdev->dev;
+ dev_set_drvdata(edac_dev->dev, edac_dev);
+ edac_dev->ctl_name = ctx->name;
+ edac_dev->dev_name = ctx->name;
+ edac_dev->mod_name = EDAC_MOD_STR;
+
+ ctx->pcp_map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
+ "regmap-pcp");
+ if (IS_ERR(ctx->pcp_map)) {
+ dev_err(&pdev->dev, "unable to get syscon regmap pcp\n");
+ rc = PTR_ERR(ctx->pcp_map);
+ goto err1;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ ctx->dev_csr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(ctx->dev_csr)) {
+ dev_err(&pdev->dev, "no SoC resource address\n");
+ rc = PTR_ERR(ctx->dev_csr);
+ goto err1;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ ctx->bus_csr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(ctx->bus_csr)) {
+ dev_err(&pdev->dev, "no SoC bus resource address\n");
+ rc = PTR_ERR(ctx->bus_csr);
+ goto err1;
+ }
+
+ if (edac_op_state == EDAC_OPSTATE_POLL)
+ edac_dev->edac_check = xgene_edac_soc_check;
+
+ rc = edac_device_add_device(edac_dev);
+ if (rc > 0) {
+ dev_err(&pdev->dev, "edac_device_add_device failed\n");
+ rc = -ENOMEM;
+ goto err1;
+ }
+
+ if (edac_op_state == EDAC_OPSTATE_INT) {
+ int irq;
+ int i;
+
+ /*
+ * Register for SoC un-correctable and correctable errors
+ */
+ for (i = 0; i < 3; i++) {
+ irq = platform_get_irq(pdev, i);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "No IRQ resource\n");
+ rc = -EINVAL;
+ goto err2;
+ }
+ rc = devm_request_irq(&pdev->dev, irq,
+ xgene_edac_soc_isr, IRQF_SHARED,
+ dev_name(&pdev->dev), edac_dev);
+ if (rc) {
+ dev_err(&pdev->dev,
+ "Could not request IRQ %d\n", irq);
+ goto err2;
+ }
+ }
+
+ edac_dev->op_state = OP_RUNNING_INTERRUPT;
+ }
+
+ xgene_edac_soc_hw_ctl(edac_dev, true);
+
+ devres_remove_group(&pdev->dev, xgene_edac_soc_probe);
+
+ dev_info(&pdev->dev, "X-Gene EDAC SoC registered\n");
+ return 0;
+
+err2:
+ edac_device_del_device(&pdev->dev);
+err1:
+ edac_device_free_ctl_info(edac_dev);
+err:
+ devres_release_group(&pdev->dev, xgene_edac_soc_probe);
+ return rc;
+}
+
+static int xgene_edac_soc_remove(struct platform_device *pdev)
+{
+ struct edac_device_ctl_info *edac_dev = dev_get_drvdata(&pdev->dev);
+
+ xgene_edac_soc_hw_ctl(edac_dev, false);
+ edac_device_del_device(&pdev->dev);
+ edac_device_free_ctl_info(edac_dev);
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static struct of_device_id xgene_edac_soc_of_match[] = {
+ { .compatible = "apm,xgene-edac-soc" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, xgene_edac_soc_of_match);
+#endif
+
+static struct platform_driver xgene_edac_soc_driver = {
+ .probe = xgene_edac_soc_probe,
+ .remove = xgene_edac_soc_remove,
+ .driver = {
+ .name = "xgene-edac-soc",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(xgene_edac_soc_of_match),
+ },
+};
+
+static int __init xgene_edac_init(void)
+{
+ int rc;
+
+ /* Make sure error reporting method is sane */
+ switch (edac_op_state) {
+ case EDAC_OPSTATE_POLL:
+ case EDAC_OPSTATE_INT:
+ break;
+ default:
+ edac_op_state = EDAC_OPSTATE_INT;
+ break;
+ }
+
+ rc = platform_driver_register(&xgene_edac_mc_driver);
+ if (rc) {
+ edac_printk(KERN_ERR, EDAC_MOD_STR, "MCU fails to register\n");
+ goto reg_mc_failed;
+ }
+ rc = platform_driver_register(&xgene_edac_pmd_driver);
+ if (rc) {
+ edac_printk(KERN_ERR, EDAC_MOD_STR, "PMD fails to register\n");
+ goto reg_pmd_failed;
+ }
+ rc = platform_driver_register(&xgene_edac_l3_driver);
+ if (rc) {
+ edac_printk(KERN_ERR, EDAC_MOD_STR, "L3 fails to register\n");
+ goto reg_l3_failed;
+ }
+ rc = platform_driver_register(&xgene_edac_soc_driver);
+ if (rc) {
+ edac_printk(KERN_ERR, EDAC_MOD_STR, "SoC fails to register\n");
+ goto reg_soc_failed;
+ }
+
+ return 0;
+
+reg_soc_failed:
+ platform_driver_unregister(&xgene_edac_l3_driver);
+
+reg_l3_failed:
+ platform_driver_unregister(&xgene_edac_pmd_driver);
+
+reg_pmd_failed:
+ platform_driver_unregister(&xgene_edac_mc_driver);
+
+reg_mc_failed:
+ return rc;
+}
+module_init(xgene_edac_init);
+
+static void __exit xgene_edac_exit(void)
+{
+ platform_driver_unregister(&xgene_edac_soc_driver);
+ platform_driver_unregister(&xgene_edac_l3_driver);
+ platform_driver_unregister(&xgene_edac_pmd_driver);
+ platform_driver_unregister(&xgene_edac_mc_driver);
+}
+module_exit(xgene_edac_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Feng Kan <fkan-qTEPVZfXA3Y@public.gmane.org>");
+MODULE_DESCRIPTION("APM X-Gene EDAC driver");
+module_param(edac_op_state, int, 0444);
+MODULE_PARM_DESC(edac_op_state,
+ "EDAC Error Reporting state: 0=Poll, 2=Interrupt");
--
1.7.1