548 lines
14 KiB
C
548 lines
14 KiB
C
/*
|
|
* 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);
|