2013-02-15 17:11:57 +08:00
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/*
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* GHES/EDAC Linux driver
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*
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* This file may be distributed under the terms of the GNU General Public
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* License version 2.
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*
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* Copyright (c) 2013 by Mauro Carvalho Chehab <mchehab@redhat.com>
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*
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* Red Hat Inc. http://www.redhat.com
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*/
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2013-02-15 20:06:38 +08:00
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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2013-02-15 17:11:57 +08:00
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#include <acpi/ghes.h>
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#include <linux/edac.h>
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2013-02-14 20:11:08 +08:00
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#include <linux/dmi.h>
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2013-02-15 17:11:57 +08:00
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#include "edac_core.h"
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#define GHES_EDAC_REVISION " Ver: 1.0.0"
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struct ghes_edac_pvt {
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struct list_head list;
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struct ghes *ghes;
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struct mem_ctl_info *mci;
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};
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static LIST_HEAD(ghes_reglist);
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static DEFINE_MUTEX(ghes_edac_lock);
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static int ghes_edac_mc_num;
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2013-02-15 20:06:38 +08:00
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2013-02-14 20:11:08 +08:00
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/* Memory Device - Type 17 of SMBIOS spec */
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struct memdev_dmi_entry {
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u8 type;
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u8 length;
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u16 handle;
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u16 phys_mem_array_handle;
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u16 mem_err_info_handle;
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u16 total_width;
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u16 data_width;
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u16 size;
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u8 form_factor;
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u8 device_set;
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u8 device_locator;
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u8 bank_locator;
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u8 memory_type;
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u16 type_detail;
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u16 speed;
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u8 manufacturer;
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u8 serial_number;
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u8 asset_tag;
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u8 part_number;
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u8 attributes;
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u32 extended_size;
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u16 conf_mem_clk_speed;
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} __attribute__((__packed__));
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struct ghes_edac_dimm_fill {
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struct mem_ctl_info *mci;
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unsigned count;
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};
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char *memory_type[] = {
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[MEM_EMPTY] = "EMPTY",
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[MEM_RESERVED] = "RESERVED",
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[MEM_UNKNOWN] = "UNKNOWN",
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[MEM_FPM] = "FPM",
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[MEM_EDO] = "EDO",
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[MEM_BEDO] = "BEDO",
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[MEM_SDR] = "SDR",
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[MEM_RDR] = "RDR",
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[MEM_DDR] = "DDR",
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[MEM_RDDR] = "RDDR",
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[MEM_RMBS] = "RMBS",
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[MEM_DDR2] = "DDR2",
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[MEM_FB_DDR2] = "FB_DDR2",
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[MEM_RDDR2] = "RDDR2",
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[MEM_XDR] = "XDR",
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[MEM_DDR3] = "DDR3",
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[MEM_RDDR3] = "RDDR3",
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};
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static void ghes_edac_count_dimms(const struct dmi_header *dh, void *arg)
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{
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int *num_dimm = arg;
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if (dh->type == DMI_ENTRY_MEM_DEVICE)
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(*num_dimm)++;
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}
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static void ghes_edac_dmidecode(const struct dmi_header *dh, void *arg)
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{
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struct ghes_edac_dimm_fill *dimm_fill = arg;
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struct mem_ctl_info *mci = dimm_fill->mci;
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if (dh->type == DMI_ENTRY_MEM_DEVICE) {
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struct memdev_dmi_entry *entry = (struct memdev_dmi_entry *)dh;
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struct dimm_info *dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms,
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mci->n_layers,
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dimm_fill->count, 0, 0);
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if (entry->size == 0xffff) {
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2013-02-15 20:06:38 +08:00
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pr_info("Can't get DIMM%i size\n",
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dimm_fill->count);
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2013-02-14 20:11:08 +08:00
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dimm->nr_pages = MiB_TO_PAGES(32);/* Unknown */
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} else if (entry->size == 0x7fff) {
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dimm->nr_pages = MiB_TO_PAGES(entry->extended_size);
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} else {
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if (entry->size & 1 << 15)
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dimm->nr_pages = MiB_TO_PAGES((entry->size &
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0x7fff) << 10);
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else
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dimm->nr_pages = MiB_TO_PAGES(entry->size);
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}
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switch (entry->memory_type) {
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case 0x12:
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if (entry->type_detail & 1 << 13)
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dimm->mtype = MEM_RDDR;
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else
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dimm->mtype = MEM_DDR;
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break;
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case 0x13:
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if (entry->type_detail & 1 << 13)
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dimm->mtype = MEM_RDDR2;
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else
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dimm->mtype = MEM_DDR2;
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break;
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case 0x14:
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dimm->mtype = MEM_FB_DDR2;
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break;
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case 0x18:
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if (entry->type_detail & 1 << 13)
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dimm->mtype = MEM_RDDR3;
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else
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dimm->mtype = MEM_DDR3;
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break;
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default:
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if (entry->type_detail & 1 << 6)
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dimm->mtype = MEM_RMBS;
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else if ((entry->type_detail & ((1 << 7) | (1 << 13)))
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== ((1 << 7) | (1 << 13)))
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dimm->mtype = MEM_RDR;
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else if (entry->type_detail & 1 << 7)
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dimm->mtype = MEM_SDR;
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else if (entry->type_detail & 1 << 9)
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dimm->mtype = MEM_EDO;
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else
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dimm->mtype = MEM_UNKNOWN;
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}
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/*
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* Actually, we can only detect if the memory has bits for
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* checksum or not
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*/
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if (entry->total_width == entry->data_width)
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dimm->edac_mode = EDAC_NONE;
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else
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dimm->edac_mode = EDAC_SECDED;
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dimm->dtype = DEV_UNKNOWN;
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dimm->grain = 128; /* Likely, worse case */
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/*
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* FIXME: It shouldn't be hard to also fill the DIMM labels
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*/
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if (dimm->nr_pages) {
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2013-02-15 20:06:38 +08:00
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edac_dbg(1, "DIMM%i: %s size = %d MB%s\n",
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2013-02-14 20:11:08 +08:00
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dimm_fill->count, memory_type[dimm->mtype],
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PAGES_TO_MiB(dimm->nr_pages),
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(dimm->edac_mode != EDAC_NONE) ? "(ECC)" : "");
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2013-02-15 20:06:38 +08:00
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edac_dbg(2, "\ttype %d, detail 0x%02x, width %d(total %d)\n",
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2013-02-14 20:11:08 +08:00
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entry->memory_type, entry->type_detail,
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entry->total_width, entry->data_width);
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}
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dimm_fill->count++;
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}
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}
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2013-02-15 17:11:57 +08:00
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void ghes_edac_report_mem_error(struct ghes *ghes, int sev,
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2013-02-15 17:36:27 +08:00
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struct cper_sec_mem_err *mem_err)
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2013-02-15 17:11:57 +08:00
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{
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2013-02-15 17:36:27 +08:00
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enum hw_event_mc_err_type type;
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struct edac_raw_error_desc *e;
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struct mem_ctl_info *mci;
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struct ghes_edac_pvt *pvt = NULL;
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list_for_each_entry(pvt, &ghes_reglist, list) {
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if (ghes == pvt->ghes)
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break;
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}
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if (!pvt) {
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pr_err("Internal error: Can't find EDAC structure\n");
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return;
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}
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mci = pvt->mci;
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e = &mci->error_desc;
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/* Cleans the error report buffer */
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memset(e, 0, sizeof (*e));
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e->error_count = 1;
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e->msg = "APEI";
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strcpy(e->label, "unknown");
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e->other_detail = "";
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if (mem_err->validation_bits & CPER_MEM_VALID_PHYSICAL_ADDRESS) {
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e->page_frame_number = mem_err->physical_addr >> PAGE_SHIFT;
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e->offset_in_page = mem_err->physical_addr & ~PAGE_MASK;
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e->grain = ~(mem_err->physical_addr_mask & ~PAGE_MASK);
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}
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switch (sev) {
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case GHES_SEV_CORRECTED:
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type = HW_EVENT_ERR_CORRECTED;
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break;
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case GHES_SEV_RECOVERABLE:
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type = HW_EVENT_ERR_UNCORRECTED;
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break;
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case GHES_SEV_PANIC:
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type = HW_EVENT_ERR_FATAL;
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break;
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default:
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case GHES_SEV_NO:
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type = HW_EVENT_ERR_INFO;
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}
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sprintf(e->location,
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"node:%d card:%d module:%d bank:%d device:%d row: %d column:%d bit_pos:%d",
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mem_err->node, mem_err->card, mem_err->module,
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mem_err->bank, mem_err->device, mem_err->row, mem_err->column,
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mem_err->bit_pos);
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edac_dbg(3, "error at location %s\n", e->location);
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edac_raw_mc_handle_error(type, mci, e);
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2013-02-15 17:11:57 +08:00
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}
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EXPORT_SYMBOL_GPL(ghes_edac_report_mem_error);
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int ghes_edac_register(struct ghes *ghes, struct device *dev)
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{
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2013-02-14 20:11:08 +08:00
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bool fake = false;
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int rc, num_dimm = 0;
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2013-02-15 17:11:57 +08:00
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struct mem_ctl_info *mci;
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struct edac_mc_layer layers[1];
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struct ghes_edac_pvt *pvt;
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2013-02-14 20:11:08 +08:00
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struct ghes_edac_dimm_fill dimm_fill;
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/* Get the number of DIMMs */
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dmi_walk(ghes_edac_count_dimms, &num_dimm);
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/* Check if we've got a bogus BIOS */
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if (num_dimm == 0) {
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fake = true;
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num_dimm = 1;
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}
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2013-02-15 17:11:57 +08:00
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layers[0].type = EDAC_MC_LAYER_ALL_MEM;
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2013-02-14 20:11:08 +08:00
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layers[0].size = num_dimm;
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2013-02-15 17:11:57 +08:00
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layers[0].is_virt_csrow = true;
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/*
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* We need to serialize edac_mc_alloc() and edac_mc_add_mc(),
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* to avoid duplicated memory controller numbers
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*/
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mutex_lock(&ghes_edac_lock);
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mci = edac_mc_alloc(ghes_edac_mc_num, ARRAY_SIZE(layers), layers,
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sizeof(*pvt));
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if (!mci) {
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2013-02-15 20:06:38 +08:00
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pr_info("Can't allocate memory for EDAC data\n");
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2013-02-15 17:11:57 +08:00
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mutex_unlock(&ghes_edac_lock);
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return -ENOMEM;
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}
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pvt = mci->pvt_info;
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memset(pvt, 0, sizeof(*pvt));
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2013-02-15 17:36:27 +08:00
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list_add_tail(&pvt->list, &ghes_reglist);
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2013-02-15 17:11:57 +08:00
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pvt->ghes = ghes;
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pvt->mci = mci;
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mci->pdev = dev;
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mci->mtype_cap = MEM_FLAG_EMPTY;
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mci->edac_ctl_cap = EDAC_FLAG_NONE;
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mci->edac_cap = EDAC_FLAG_NONE;
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mci->mod_name = "ghes_edac.c";
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mci->mod_ver = GHES_EDAC_REVISION;
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mci->ctl_name = "ghes_edac";
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mci->dev_name = "ghes";
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2013-02-15 20:06:38 +08:00
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if (!ghes_edac_mc_num) {
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if (!fake) {
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pr_info("This EDAC driver relies on BIOS to enumerate memory and get error reports.\n");
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pr_info("Unfortunately, not all BIOSes reflect the memory layout correctly.\n");
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pr_info("So, the end result of using this driver varies from vendor to vendor.\n");
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pr_info("If you find incorrect reports, please contact your hardware vendor\n");
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pr_info("to correct its BIOS.\n");
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pr_info("This system has %d DIMM sockets.\n",
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num_dimm);
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} else {
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pr_info("This system has a very crappy BIOS: It doesn't even list the DIMMS.\n");
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pr_info("Its SMBIOS info is wrong. It is doubtful that the error report would\n");
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pr_info("work on such system. Use this driver with caution\n");
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}
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}
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2013-02-14 20:11:08 +08:00
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if (!fake) {
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2013-02-15 19:45:00 +08:00
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/*
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* Fill DIMM info from DMI for the memory controller #0
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*
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* Keep it in blank for the other memory controllers, as
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* there's no reliable way to properly credit each DIMM to
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* the memory controller, as different BIOSes fill the
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* DMI bank location fields on different ways
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*/
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if (!ghes_edac_mc_num) {
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dimm_fill.count = 0;
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dimm_fill.mci = mci;
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dmi_walk(ghes_edac_dmidecode, &dimm_fill);
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}
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2013-02-14 20:11:08 +08:00
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} else {
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struct dimm_info *dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms,
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mci->n_layers, 0, 0, 0);
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2013-02-15 17:11:57 +08:00
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2013-02-15 20:06:38 +08:00
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dimm->nr_pages = 1;
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2013-02-14 20:11:08 +08:00
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dimm->grain = 128;
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dimm->mtype = MEM_UNKNOWN;
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dimm->dtype = DEV_UNKNOWN;
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dimm->edac_mode = EDAC_SECDED;
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}
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2013-02-15 17:11:57 +08:00
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rc = edac_mc_add_mc(mci);
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if (rc < 0) {
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2013-02-15 20:06:38 +08:00
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pr_info("Can't register at EDAC core\n");
|
2013-02-15 17:11:57 +08:00
|
|
|
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;
|
|
|
|
|
|
|
|
list_for_each_entry(pvt, &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);
|