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Diffstat (limited to 'drivers/edac/ghes_edac.c')
-rw-r--r--drivers/edac/ghes_edac.c547
1 files changed, 547 insertions, 0 deletions
diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c
new file mode 100644
index 000000000..b24681998
--- /dev/null
+++ b/drivers/edac/ghes_edac.c
@@ -0,0 +1,547 @@
+/*
+ * GHES/EDAC Linux driver
+ *
+ * This file may be distributed under the terms of the GNU General Public
+ * License version 2.
+ *
+ * Copyright (c) 2013 by Mauro Carvalho Chehab
+ *
+ * Red Hat Inc. http://www.redhat.com
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <acpi/ghes.h>
+#include <linux/edac.h>
+#include <linux/dmi.h>
+#include "edac_core.h"
+#include <ras/ras_event.h>
+
+#define GHES_EDAC_REVISION " Ver: 1.0.0"
+
+struct ghes_edac_pvt {
+ struct list_head list;
+ struct ghes *ghes;
+ struct mem_ctl_info *mci;
+
+ /* Buffers for the error handling routine */
+ char detail_location[240];
+ char other_detail[160];
+ char msg[80];
+};
+
+static LIST_HEAD(ghes_reglist);
+static DEFINE_MUTEX(ghes_edac_lock);
+static int ghes_edac_mc_num;
+
+
+/* Memory Device - Type 17 of SMBIOS spec */
+struct memdev_dmi_entry {
+ u8 type;
+ u8 length;
+ u16 handle;
+ u16 phys_mem_array_handle;
+ u16 mem_err_info_handle;
+ u16 total_width;
+ u16 data_width;
+ u16 size;
+ u8 form_factor;
+ u8 device_set;
+ u8 device_locator;
+ u8 bank_locator;
+ u8 memory_type;
+ u16 type_detail;
+ u16 speed;
+ u8 manufacturer;
+ u8 serial_number;
+ u8 asset_tag;
+ u8 part_number;
+ u8 attributes;
+ u32 extended_size;
+ u16 conf_mem_clk_speed;
+} __attribute__((__packed__));
+
+struct ghes_edac_dimm_fill {
+ struct mem_ctl_info *mci;
+ unsigned count;
+};
+
+char *memory_type[] = {
+ [MEM_EMPTY] = "EMPTY",
+ [MEM_RESERVED] = "RESERVED",
+ [MEM_UNKNOWN] = "UNKNOWN",
+ [MEM_FPM] = "FPM",
+ [MEM_EDO] = "EDO",
+ [MEM_BEDO] = "BEDO",
+ [MEM_SDR] = "SDR",
+ [MEM_RDR] = "RDR",
+ [MEM_DDR] = "DDR",
+ [MEM_RDDR] = "RDDR",
+ [MEM_RMBS] = "RMBS",
+ [MEM_DDR2] = "DDR2",
+ [MEM_FB_DDR2] = "FB_DDR2",
+ [MEM_RDDR2] = "RDDR2",
+ [MEM_XDR] = "XDR",
+ [MEM_DDR3] = "DDR3",
+ [MEM_RDDR3] = "RDDR3",
+};
+
+static void ghes_edac_count_dimms(const struct dmi_header *dh, void *arg)
+{
+ int *num_dimm = arg;
+
+ if (dh->type == DMI_ENTRY_MEM_DEVICE)
+ (*num_dimm)++;
+}
+
+static void ghes_edac_dmidecode(const struct dmi_header *dh, void *arg)
+{
+ struct ghes_edac_dimm_fill *dimm_fill = arg;
+ struct mem_ctl_info *mci = dimm_fill->mci;
+
+ if (dh->type == DMI_ENTRY_MEM_DEVICE) {
+ struct memdev_dmi_entry *entry = (struct memdev_dmi_entry *)dh;
+ struct dimm_info *dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms,
+ mci->n_layers,
+ dimm_fill->count, 0, 0);
+
+ if (entry->size == 0xffff) {
+ pr_info("Can't get DIMM%i size\n",
+ dimm_fill->count);
+ dimm->nr_pages = MiB_TO_PAGES(32);/* Unknown */
+ } else if (entry->size == 0x7fff) {
+ dimm->nr_pages = MiB_TO_PAGES(entry->extended_size);
+ } else {
+ if (entry->size & 1 << 15)
+ dimm->nr_pages = MiB_TO_PAGES((entry->size &
+ 0x7fff) << 10);
+ else
+ dimm->nr_pages = MiB_TO_PAGES(entry->size);
+ }
+
+ switch (entry->memory_type) {
+ case 0x12:
+ if (entry->type_detail & 1 << 13)
+ dimm->mtype = MEM_RDDR;
+ else
+ dimm->mtype = MEM_DDR;
+ break;
+ case 0x13:
+ if (entry->type_detail & 1 << 13)
+ dimm->mtype = MEM_RDDR2;
+ else
+ dimm->mtype = MEM_DDR2;
+ break;
+ case 0x14:
+ dimm->mtype = MEM_FB_DDR2;
+ break;
+ case 0x18:
+ if (entry->type_detail & 1 << 13)
+ dimm->mtype = MEM_RDDR3;
+ else
+ dimm->mtype = MEM_DDR3;
+ break;
+ default:
+ if (entry->type_detail & 1 << 6)
+ dimm->mtype = MEM_RMBS;
+ else if ((entry->type_detail & ((1 << 7) | (1 << 13)))
+ == ((1 << 7) | (1 << 13)))
+ dimm->mtype = MEM_RDR;
+ else if (entry->type_detail & 1 << 7)
+ dimm->mtype = MEM_SDR;
+ else if (entry->type_detail & 1 << 9)
+ dimm->mtype = MEM_EDO;
+ else
+ dimm->mtype = MEM_UNKNOWN;
+ }
+
+ /*
+ * Actually, we can only detect if the memory has bits for
+ * checksum or not
+ */
+ if (entry->total_width == entry->data_width)
+ dimm->edac_mode = EDAC_NONE;
+ else
+ dimm->edac_mode = EDAC_SECDED;
+
+ dimm->dtype = DEV_UNKNOWN;
+ dimm->grain = 128; /* Likely, worse case */
+
+ /*
+ * FIXME: It shouldn't be hard to also fill the DIMM labels
+ */
+
+ if (dimm->nr_pages) {
+ edac_dbg(1, "DIMM%i: %s size = %d MB%s\n",
+ dimm_fill->count, memory_type[dimm->mtype],
+ PAGES_TO_MiB(dimm->nr_pages),
+ (dimm->edac_mode != EDAC_NONE) ? "(ECC)" : "");
+ edac_dbg(2, "\ttype %d, detail 0x%02x, width %d(total %d)\n",
+ entry->memory_type, entry->type_detail,
+ entry->total_width, entry->data_width);
+ }
+
+ dimm_fill->count++;
+ }
+}
+
+void ghes_edac_report_mem_error(struct ghes *ghes, int sev,
+ struct cper_sec_mem_err *mem_err)
+{
+ enum hw_event_mc_err_type type;
+ struct edac_raw_error_desc *e;
+ struct mem_ctl_info *mci;
+ struct ghes_edac_pvt *pvt = NULL;
+ char *p;
+ u8 grain_bits;
+
+ list_for_each_entry(pvt, &ghes_reglist, list) {
+ if (ghes == pvt->ghes)
+ break;
+ }
+ if (!pvt) {
+ pr_err("Internal error: Can't find EDAC structure\n");
+ return;
+ }
+ mci = pvt->mci;
+ e = &mci->error_desc;
+
+ /* Cleans the error report buffer */
+ memset(e, 0, sizeof (*e));
+ e->error_count = 1;
+ strcpy(e->label, "unknown label");
+ e->msg = pvt->msg;
+ e->other_detail = pvt->other_detail;
+ e->top_layer = -1;
+ e->mid_layer = -1;
+ e->low_layer = -1;
+ *pvt->other_detail = '\0';
+ *pvt->msg = '\0';
+
+ switch (sev) {
+ case GHES_SEV_CORRECTED:
+ type = HW_EVENT_ERR_CORRECTED;
+ break;
+ case GHES_SEV_RECOVERABLE:
+ type = HW_EVENT_ERR_UNCORRECTED;
+ break;
+ case GHES_SEV_PANIC:
+ type = HW_EVENT_ERR_FATAL;
+ break;
+ default:
+ case GHES_SEV_NO:
+ type = HW_EVENT_ERR_INFO;
+ }
+
+ edac_dbg(1, "error validation_bits: 0x%08llx\n",
+ (long long)mem_err->validation_bits);
+
+ /* Error type, mapped on e->msg */
+ if (mem_err->validation_bits & CPER_MEM_VALID_ERROR_TYPE) {
+ p = pvt->msg;
+ switch (mem_err->error_type) {
+ case 0:
+ p += sprintf(p, "Unknown");
+ break;
+ case 1:
+ p += sprintf(p, "No error");
+ break;
+ case 2:
+ p += sprintf(p, "Single-bit ECC");
+ break;
+ case 3:
+ p += sprintf(p, "Multi-bit ECC");
+ break;
+ case 4:
+ p += sprintf(p, "Single-symbol ChipKill ECC");
+ break;
+ case 5:
+ p += sprintf(p, "Multi-symbol ChipKill ECC");
+ break;
+ case 6:
+ p += sprintf(p, "Master abort");
+ break;
+ case 7:
+ p += sprintf(p, "Target abort");
+ break;
+ case 8:
+ p += sprintf(p, "Parity Error");
+ break;
+ case 9:
+ p += sprintf(p, "Watchdog timeout");
+ break;
+ case 10:
+ p += sprintf(p, "Invalid address");
+ break;
+ case 11:
+ p += sprintf(p, "Mirror Broken");
+ break;
+ case 12:
+ p += sprintf(p, "Memory Sparing");
+ break;
+ case 13:
+ p += sprintf(p, "Scrub corrected error");
+ break;
+ case 14:
+ p += sprintf(p, "Scrub uncorrected error");
+ break;
+ case 15:
+ p += sprintf(p, "Physical Memory Map-out event");
+ break;
+ default:
+ p += sprintf(p, "reserved error (%d)",
+ mem_err->error_type);
+ }
+ } else {
+ strcpy(pvt->msg, "unknown error");
+ }
+
+ /* Error address */
+ if (mem_err->validation_bits & CPER_MEM_VALID_PA) {
+ e->page_frame_number = mem_err->physical_addr >> PAGE_SHIFT;
+ e->offset_in_page = mem_err->physical_addr & ~PAGE_MASK;
+ }
+
+ /* Error grain */
+ if (mem_err->validation_bits & CPER_MEM_VALID_PA_MASK)
+ e->grain = ~(mem_err->physical_addr_mask & ~PAGE_MASK);
+
+ /* Memory error location, mapped on e->location */
+ p = e->location;
+ if (mem_err->validation_bits & CPER_MEM_VALID_NODE)
+ p += sprintf(p, "node:%d ", mem_err->node);
+ if (mem_err->validation_bits & CPER_MEM_VALID_CARD)
+ p += sprintf(p, "card:%d ", mem_err->card);
+ if (mem_err->validation_bits & CPER_MEM_VALID_MODULE)
+ p += sprintf(p, "module:%d ", mem_err->module);
+ if (mem_err->validation_bits & CPER_MEM_VALID_RANK_NUMBER)
+ p += sprintf(p, "rank:%d ", mem_err->rank);
+ if (mem_err->validation_bits & CPER_MEM_VALID_BANK)
+ p += sprintf(p, "bank:%d ", mem_err->bank);
+ if (mem_err->validation_bits & CPER_MEM_VALID_ROW)
+ p += sprintf(p, "row:%d ", mem_err->row);
+ if (mem_err->validation_bits & CPER_MEM_VALID_COLUMN)
+ p += sprintf(p, "col:%d ", mem_err->column);
+ if (mem_err->validation_bits & CPER_MEM_VALID_BIT_POSITION)
+ p += sprintf(p, "bit_pos:%d ", mem_err->bit_pos);
+ if (mem_err->validation_bits & CPER_MEM_VALID_MODULE_HANDLE) {
+ const char *bank = NULL, *device = NULL;
+ dmi_memdev_name(mem_err->mem_dev_handle, &bank, &device);
+ if (bank != NULL && device != NULL)
+ p += sprintf(p, "DIMM location:%s %s ", bank, device);
+ else
+ p += sprintf(p, "DIMM DMI handle: 0x%.4x ",
+ mem_err->mem_dev_handle);
+ }
+ if (p > e->location)
+ *(p - 1) = '\0';
+
+ /* All other fields are mapped on e->other_detail */
+ p = pvt->other_detail;
+ if (mem_err->validation_bits & CPER_MEM_VALID_ERROR_STATUS) {
+ u64 status = mem_err->error_status;
+
+ p += sprintf(p, "status(0x%016llx): ", (long long)status);
+ switch ((status >> 8) & 0xff) {
+ case 1:
+ p += sprintf(p, "Error detected internal to the component ");
+ break;
+ case 16:
+ p += sprintf(p, "Error detected in the bus ");
+ break;
+ case 4:
+ p += sprintf(p, "Storage error in DRAM memory ");
+ break;
+ case 5:
+ p += sprintf(p, "Storage error in TLB ");
+ break;
+ case 6:
+ p += sprintf(p, "Storage error in cache ");
+ break;
+ case 7:
+ p += sprintf(p, "Error in one or more functional units ");
+ break;
+ case 8:
+ p += sprintf(p, "component failed self test ");
+ break;
+ case 9:
+ p += sprintf(p, "Overflow or undervalue of internal queue ");
+ break;
+ case 17:
+ p += sprintf(p, "Virtual address not found on IO-TLB or IO-PDIR ");
+ break;
+ case 18:
+ p += sprintf(p, "Improper access error ");
+ break;
+ case 19:
+ p += sprintf(p, "Access to a memory address which is not mapped to any component ");
+ break;
+ case 20:
+ p += sprintf(p, "Loss of Lockstep ");
+ break;
+ case 21:
+ p += sprintf(p, "Response not associated with a request ");
+ break;
+ case 22:
+ p += sprintf(p, "Bus parity error - must also set the A, C, or D Bits ");
+ break;
+ case 23:
+ p += sprintf(p, "Detection of a PATH_ERROR ");
+ break;
+ case 25:
+ p += sprintf(p, "Bus operation timeout ");
+ break;
+ case 26:
+ p += sprintf(p, "A read was issued to data that has been poisoned ");
+ break;
+ default:
+ p += sprintf(p, "reserved ");
+ break;
+ }
+ }
+ if (mem_err->validation_bits & CPER_MEM_VALID_REQUESTOR_ID)
+ p += sprintf(p, "requestorID: 0x%016llx ",
+ (long long)mem_err->requestor_id);
+ if (mem_err->validation_bits & CPER_MEM_VALID_RESPONDER_ID)
+ p += sprintf(p, "responderID: 0x%016llx ",
+ (long long)mem_err->responder_id);
+ if (mem_err->validation_bits & CPER_MEM_VALID_TARGET_ID)
+ p += sprintf(p, "targetID: 0x%016llx ",
+ (long long)mem_err->responder_id);
+ if (p > pvt->other_detail)
+ *(p - 1) = '\0';
+
+ /* Generate the trace event */
+ grain_bits = fls_long(e->grain);
+ snprintf(pvt->detail_location, sizeof(pvt->detail_location),
+ "APEI location: %s %s", e->location, e->other_detail);
+ trace_mc_event(type, e->msg, e->label, e->error_count,
+ mci->mc_idx, e->top_layer, e->mid_layer, e->low_layer,
+ PAGES_TO_MiB(e->page_frame_number) | e->offset_in_page,
+ grain_bits, e->syndrome, pvt->detail_location);
+
+ /* Report the error via EDAC API */
+ edac_raw_mc_handle_error(type, mci, e);
+}
+EXPORT_SYMBOL_GPL(ghes_edac_report_mem_error);
+
+int ghes_edac_register(struct ghes *ghes, struct device *dev)
+{
+ bool fake = false;
+ int rc, num_dimm = 0;
+ struct mem_ctl_info *mci;
+ struct edac_mc_layer layers[1];
+ struct ghes_edac_pvt *pvt;
+ struct ghes_edac_dimm_fill dimm_fill;
+
+ /* Get the number of DIMMs */
+ dmi_walk(ghes_edac_count_dimms, &num_dimm);
+
+ /* Check if we've got a bogus BIOS */
+ if (num_dimm == 0) {
+ fake = true;
+ num_dimm = 1;
+ }
+
+ layers[0].type = EDAC_MC_LAYER_ALL_MEM;
+ layers[0].size = num_dimm;
+ layers[0].is_virt_csrow = true;
+
+ /*
+ * We need to serialize edac_mc_alloc() and edac_mc_add_mc(),
+ * to avoid duplicated memory controller numbers
+ */
+ mutex_lock(&ghes_edac_lock);
+ mci = edac_mc_alloc(ghes_edac_mc_num, ARRAY_SIZE(layers), layers,
+ sizeof(*pvt));
+ if (!mci) {
+ pr_info("Can't allocate memory for EDAC data\n");
+ mutex_unlock(&ghes_edac_lock);
+ return -ENOMEM;
+ }
+
+ pvt = mci->pvt_info;
+ memset(pvt, 0, sizeof(*pvt));
+ list_add_tail(&pvt->list, &ghes_reglist);
+ pvt->ghes = ghes;
+ pvt->mci = mci;
+ mci->pdev = dev;
+
+ mci->mtype_cap = MEM_FLAG_EMPTY;
+ mci->edac_ctl_cap = EDAC_FLAG_NONE;
+ mci->edac_cap = EDAC_FLAG_NONE;
+ mci->mod_name = "ghes_edac.c";
+ mci->mod_ver = GHES_EDAC_REVISION;
+ mci->ctl_name = "ghes_edac";
+ mci->dev_name = "ghes";
+
+ if (!ghes_edac_mc_num) {
+ if (!fake) {
+ pr_info("This EDAC driver relies on BIOS to enumerate memory and get error reports.\n");
+ pr_info("Unfortunately, not all BIOSes reflect the memory layout correctly.\n");
+ pr_info("So, the end result of using this driver varies from vendor to vendor.\n");
+ pr_info("If you find incorrect reports, please contact your hardware vendor\n");
+ pr_info("to correct its BIOS.\n");
+ pr_info("This system has %d DIMM sockets.\n",
+ num_dimm);
+ } else {
+ pr_info("This system has a very crappy BIOS: It doesn't even list the DIMMS.\n");
+ pr_info("Its SMBIOS info is wrong. It is doubtful that the error report would\n");
+ pr_info("work on such system. Use this driver with caution\n");
+ }
+ }
+
+ if (!fake) {
+ /*
+ * Fill DIMM info from DMI for the memory controller #0
+ *
+ * Keep it in blank for the other memory controllers, as
+ * there's no reliable way to properly credit each DIMM to
+ * the memory controller, as different BIOSes fill the
+ * DMI bank location fields on different ways
+ */
+ if (!ghes_edac_mc_num) {
+ dimm_fill.count = 0;
+ dimm_fill.mci = mci;
+ dmi_walk(ghes_edac_dmidecode, &dimm_fill);
+ }
+ } else {
+ struct dimm_info *dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms,
+ mci->n_layers, 0, 0, 0);
+
+ dimm->nr_pages = 1;
+ dimm->grain = 128;
+ dimm->mtype = MEM_UNKNOWN;
+ dimm->dtype = DEV_UNKNOWN;
+ dimm->edac_mode = EDAC_SECDED;
+ }
+
+ rc = edac_mc_add_mc(mci);
+ if (rc < 0) {
+ pr_info("Can't register at EDAC core\n");
+ edac_mc_free(mci);
+ mutex_unlock(&ghes_edac_lock);
+ return -ENODEV;
+ }
+
+ ghes_edac_mc_num++;
+ mutex_unlock(&ghes_edac_lock);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ghes_edac_register);
+
+void ghes_edac_unregister(struct ghes *ghes)
+{
+ struct mem_ctl_info *mci;
+ struct ghes_edac_pvt *pvt, *tmp;
+
+ list_for_each_entry_safe(pvt, tmp, &ghes_reglist, list) {
+ if (ghes == pvt->ghes) {
+ mci = pvt->mci;
+ edac_mc_del_mc(mci->pdev);
+ edac_mc_free(mci);
+ list_del(&pvt->list);
+ }
+ }
+}
+EXPORT_SYMBOL_GPL(ghes_edac_unregister);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-16 10:56:57 +0000