This patch adds support for the APM X-Gene SoC EDAC driver. Signed-off-by: Feng Kan <fkan@xxxxxxx> Signed-off-by: Loc Ho <lho@xxxxxxx> --- 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@xxxxxxx> + * Loc Ho <lho@xxxxxxx> + * + * 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, ®)) + 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, ®)) + 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, ®)) + 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, ®)) + 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, ®)) + 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@xxxxxxx>"); +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 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
