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i7core_edac.c
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// SPDX-License-Identifier: GPL-2.0-only
/* Intel i7 core/Nehalem Memory Controller kernel module
*
* This driver supports the memory controllers found on the Intel
* processor families i7core, i7core 7xx/8xx, i5core, Xeon 35xx,
* Xeon 55xx and Xeon 56xx also known as Nehalem, Nehalem-EP, Lynnfield
* and Westmere-EP.
*
* Copyright (c) 2009-2010 by:
* Mauro Carvalho Chehab
*
* Red Hat Inc. http://www.redhat.com
*
* Forked and adapted from the i5400_edac driver
*
* Based on the following public Intel datasheets:
* Intel Core i7 Processor Extreme Edition and Intel Core i7 Processor
* Datasheet, Volume 2:
* http://download.intel.com/design/processor/datashts/320835.pdf
* Intel Xeon Processor 5500 Series Datasheet Volume 2
* http://www.intel.com/Assets/PDF/datasheet/321322.pdf
* also available at:
* http://www.arrownac.com/manufacturers/intel/s/nehalem/5500-datasheet-v2.pdf
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/pci_ids.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/dmi.h>
#include <linux/edac.h>
#include <linux/mmzone.h>
#include <linux/smp.h>
#include <asm/mce.h>
#include <asm/processor.h>
#include <asm/div64.h>
#include "edac_module.h"
/* Static vars */
static LIST_HEAD(i7core_edac_list);
static DEFINE_MUTEX(i7core_edac_lock);
static int probed;
static int use_pci_fixup;
module_param(use_pci_fixup, int, 0444);
MODULE_PARM_DESC(use_pci_fixup, "Enable PCI fixup to seek for hidden devices");
/*
* This is used for Nehalem-EP and Nehalem-EX devices, where the non-core
* registers start at bus 255, and are not reported by BIOS.
* We currently find devices with only 2 sockets. In order to support more QPI
* Quick Path Interconnect, just increment this number.
*/
#define MAX_SOCKET_BUSES 2
/*
* Alter this version for the module when modifications are made
*/
#define I7CORE_REVISION " Ver: 1.0.0"
#define EDAC_MOD_STR "i7core_edac"
/*
* Debug macros
*/
#define i7core_printk(level, fmt, arg...) \
edac_printk(level, "i7core", fmt, ##arg)
#define i7core_mc_printk(mci, level, fmt, arg...) \
edac_mc_chipset_printk(mci, level, "i7core", fmt, ##arg)
/*
* i7core Memory Controller Registers
*/
/* OFFSETS for Device 0 Function 0 */
#define MC_CFG_CONTROL 0x90
#define MC_CFG_UNLOCK 0x02
#define MC_CFG_LOCK 0x00
/* OFFSETS for Device 3 Function 0 */
#define MC_CONTROL 0x48
#define MC_STATUS 0x4c
#define MC_MAX_DOD 0x64
/*
* OFFSETS for Device 3 Function 4, as indicated on Xeon 5500 datasheet:
* http://www.arrownac.com/manufacturers/intel/s/nehalem/5500-datasheet-v2.pdf
*/
#define MC_TEST_ERR_RCV1 0x60
#define DIMM2_COR_ERR(r) ((r) & 0x7fff)
#define MC_TEST_ERR_RCV0 0x64
#define DIMM1_COR_ERR(r) (((r) >> 16) & 0x7fff)
#define DIMM0_COR_ERR(r) ((r) & 0x7fff)
/* OFFSETS for Device 3 Function 2, as indicated on Xeon 5500 datasheet */
#define MC_SSRCONTROL 0x48
#define SSR_MODE_DISABLE 0x00
#define SSR_MODE_ENABLE 0x01
#define SSR_MODE_MASK 0x03
#define MC_SCRUB_CONTROL 0x4c
#define STARTSCRUB (1 << 24)
#define SCRUBINTERVAL_MASK 0xffffff
#define MC_COR_ECC_CNT_0 0x80
#define MC_COR_ECC_CNT_1 0x84
#define MC_COR_ECC_CNT_2 0x88
#define MC_COR_ECC_CNT_3 0x8c
#define MC_COR_ECC_CNT_4 0x90
#define MC_COR_ECC_CNT_5 0x94
#define DIMM_TOP_COR_ERR(r) (((r) >> 16) & 0x7fff)
#define DIMM_BOT_COR_ERR(r) ((r) & 0x7fff)
/* OFFSETS for Devices 4,5 and 6 Function 0 */
#define MC_CHANNEL_DIMM_INIT_PARAMS 0x58
#define THREE_DIMMS_PRESENT (1 << 24)
#define SINGLE_QUAD_RANK_PRESENT (1 << 23)
#define QUAD_RANK_PRESENT (1 << 22)
#define REGISTERED_DIMM (1 << 15)
#define MC_CHANNEL_MAPPER 0x60
#define RDLCH(r, ch) ((((r) >> (3 + (ch * 6))) & 0x07) - 1)
#define WRLCH(r, ch) ((((r) >> (ch * 6)) & 0x07) - 1)
#define MC_CHANNEL_RANK_PRESENT 0x7c
#define RANK_PRESENT_MASK 0xffff
#define MC_CHANNEL_ADDR_MATCH 0xf0
#define MC_CHANNEL_ERROR_MASK 0xf8
#define MC_CHANNEL_ERROR_INJECT 0xfc
#define INJECT_ADDR_PARITY 0x10
#define INJECT_ECC 0x08
#define MASK_CACHELINE 0x06
#define MASK_FULL_CACHELINE 0x06
#define MASK_MSB32_CACHELINE 0x04
#define MASK_LSB32_CACHELINE 0x02
#define NO_MASK_CACHELINE 0x00
#define REPEAT_EN 0x01
/* OFFSETS for Devices 4,5 and 6 Function 1 */
#define MC_DOD_CH_DIMM0 0x48
#define MC_DOD_CH_DIMM1 0x4c
#define MC_DOD_CH_DIMM2 0x50
#define RANKOFFSET_MASK ((1 << 12) | (1 << 11) | (1 << 10))
#define RANKOFFSET(x) ((x & RANKOFFSET_MASK) >> 10)
#define DIMM_PRESENT_MASK (1 << 9)
#define DIMM_PRESENT(x) (((x) & DIMM_PRESENT_MASK) >> 9)
#define MC_DOD_NUMBANK_MASK ((1 << 8) | (1 << 7))
#define MC_DOD_NUMBANK(x) (((x) & MC_DOD_NUMBANK_MASK) >> 7)
#define MC_DOD_NUMRANK_MASK ((1 << 6) | (1 << 5))
#define MC_DOD_NUMRANK(x) (((x) & MC_DOD_NUMRANK_MASK) >> 5)
#define MC_DOD_NUMROW_MASK ((1 << 4) | (1 << 3) | (1 << 2))
#define MC_DOD_NUMROW(x) (((x) & MC_DOD_NUMROW_MASK) >> 2)
#define MC_DOD_NUMCOL_MASK 3
#define MC_DOD_NUMCOL(x) ((x) & MC_DOD_NUMCOL_MASK)
#define MC_RANK_PRESENT 0x7c
#define MC_SAG_CH_0 0x80
#define MC_SAG_CH_1 0x84
#define MC_SAG_CH_2 0x88
#define MC_SAG_CH_3 0x8c
#define MC_SAG_CH_4 0x90
#define MC_SAG_CH_5 0x94
#define MC_SAG_CH_6 0x98
#define MC_SAG_CH_7 0x9c
#define MC_RIR_LIMIT_CH_0 0x40
#define MC_RIR_LIMIT_CH_1 0x44
#define MC_RIR_LIMIT_CH_2 0x48
#define MC_RIR_LIMIT_CH_3 0x4C
#define MC_RIR_LIMIT_CH_4 0x50
#define MC_RIR_LIMIT_CH_5 0x54
#define MC_RIR_LIMIT_CH_6 0x58
#define MC_RIR_LIMIT_CH_7 0x5C
#define MC_RIR_LIMIT_MASK ((1 << 10) - 1)
#define MC_RIR_WAY_CH 0x80
#define MC_RIR_WAY_OFFSET_MASK (((1 << 14) - 1) & ~0x7)
#define MC_RIR_WAY_RANK_MASK 0x7
/*
* i7core structs
*/
#define NUM_CHANS 3
#define MAX_DIMMS 3 /* Max DIMMS per channel */
#define MAX_MCR_FUNC 4
#define MAX_CHAN_FUNC 3
struct i7core_info {
u32 mc_control;
u32 mc_status;
u32 max_dod;
u32 ch_map;
};
struct i7core_inject {
int enable;
u32 section;
u32 type;
u32 eccmask;
/* Error address mask */
int channel, dimm, rank, bank, page, col;
};
struct i7core_channel {
bool is_3dimms_present;
bool is_single_4rank;
bool has_4rank;
u32 dimms;
};
struct pci_id_descr {
int dev;
int func;
int dev_id;
int optional;
};
struct pci_id_table {
const struct pci_id_descr *descr;
int n_devs;
};
struct i7core_dev {
struct list_head list;
u8 socket;
struct pci_dev **pdev;
int n_devs;
struct mem_ctl_info *mci;
};
struct i7core_pvt {
struct device *addrmatch_dev, *chancounts_dev;
struct pci_dev *pci_noncore;
struct pci_dev *pci_mcr[MAX_MCR_FUNC + 1];
struct pci_dev *pci_ch[NUM_CHANS][MAX_CHAN_FUNC + 1];
struct i7core_dev *i7core_dev;
struct i7core_info info;
struct i7core_inject inject;
struct i7core_channel channel[NUM_CHANS];
int ce_count_available;
/* ECC corrected errors counts per udimm */
unsigned long udimm_ce_count[MAX_DIMMS];
int udimm_last_ce_count[MAX_DIMMS];
/* ECC corrected errors counts per rdimm */
unsigned long rdimm_ce_count[NUM_CHANS][MAX_DIMMS];
int rdimm_last_ce_count[NUM_CHANS][MAX_DIMMS];
bool is_registered, enable_scrub;
/* DCLK Frequency used for computing scrub rate */
int dclk_freq;
/* Struct to control EDAC polling */
struct edac_pci_ctl_info *i7core_pci;
};
#define PCI_DESCR(device, function, device_id) \
.dev = (device), \
.func = (function), \
.dev_id = (device_id)
static const struct pci_id_descr pci_dev_descr_i7core_nehalem[] = {
/* Memory controller */
{ PCI_DESCR(3, 0, PCI_DEVICE_ID_INTEL_I7_MCR) },
{ PCI_DESCR(3, 1, PCI_DEVICE_ID_INTEL_I7_MC_TAD) },
/* Exists only for RDIMM */
{ PCI_DESCR(3, 2, PCI_DEVICE_ID_INTEL_I7_MC_RAS), .optional = 1 },
{ PCI_DESCR(3, 4, PCI_DEVICE_ID_INTEL_I7_MC_TEST) },
/* Channel 0 */
{ PCI_DESCR(4, 0, PCI_DEVICE_ID_INTEL_I7_MC_CH0_CTRL) },
{ PCI_DESCR(4, 1, PCI_DEVICE_ID_INTEL_I7_MC_CH0_ADDR) },
{ PCI_DESCR(4, 2, PCI_DEVICE_ID_INTEL_I7_MC_CH0_RANK) },
{ PCI_DESCR(4, 3, PCI_DEVICE_ID_INTEL_I7_MC_CH0_TC) },
/* Channel 1 */
{ PCI_DESCR(5, 0, PCI_DEVICE_ID_INTEL_I7_MC_CH1_CTRL) },
{ PCI_DESCR(5, 1, PCI_DEVICE_ID_INTEL_I7_MC_CH1_ADDR) },
{ PCI_DESCR(5, 2, PCI_DEVICE_ID_INTEL_I7_MC_CH1_RANK) },
{ PCI_DESCR(5, 3, PCI_DEVICE_ID_INTEL_I7_MC_CH1_TC) },
/* Channel 2 */
{ PCI_DESCR(6, 0, PCI_DEVICE_ID_INTEL_I7_MC_CH2_CTRL) },
{ PCI_DESCR(6, 1, PCI_DEVICE_ID_INTEL_I7_MC_CH2_ADDR) },
{ PCI_DESCR(6, 2, PCI_DEVICE_ID_INTEL_I7_MC_CH2_RANK) },
{ PCI_DESCR(6, 3, PCI_DEVICE_ID_INTEL_I7_MC_CH2_TC) },
/* Generic Non-core registers */
/*
* This is the PCI device on i7core and on Xeon 35xx (8086:2c41)
* On Xeon 55xx, however, it has a different id (8086:2c40). So,
* the probing code needs to test for the other address in case of
* failure of this one
*/
{ PCI_DESCR(0, 0, PCI_DEVICE_ID_INTEL_I7_NONCORE) },
};
static const struct pci_id_descr pci_dev_descr_lynnfield[] = {
{ PCI_DESCR( 3, 0, PCI_DEVICE_ID_INTEL_LYNNFIELD_MCR) },
{ PCI_DESCR( 3, 1, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_TAD) },
{ PCI_DESCR( 3, 4, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_TEST) },
{ PCI_DESCR( 4, 0, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH0_CTRL) },
{ PCI_DESCR( 4, 1, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH0_ADDR) },
{ PCI_DESCR( 4, 2, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH0_RANK) },
{ PCI_DESCR( 4, 3, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH0_TC) },
{ PCI_DESCR( 5, 0, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH1_CTRL) },
{ PCI_DESCR( 5, 1, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH1_ADDR) },
{ PCI_DESCR( 5, 2, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH1_RANK) },
{ PCI_DESCR( 5, 3, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH1_TC) },
/*
* This is the PCI device has an alternate address on some
* processors like Core i7 860
*/
{ PCI_DESCR( 0, 0, PCI_DEVICE_ID_INTEL_LYNNFIELD_NONCORE) },
};
static const struct pci_id_descr pci_dev_descr_i7core_westmere[] = {
/* Memory controller */
{ PCI_DESCR(3, 0, PCI_DEVICE_ID_INTEL_LYNNFIELD_MCR_REV2) },
{ PCI_DESCR(3, 1, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_TAD_REV2) },
/* Exists only for RDIMM */
{ PCI_DESCR(3, 2, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_RAS_REV2), .optional = 1 },
{ PCI_DESCR(3, 4, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_TEST_REV2) },
/* Channel 0 */
{ PCI_DESCR(4, 0, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH0_CTRL_REV2) },
{ PCI_DESCR(4, 1, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH0_ADDR_REV2) },
{ PCI_DESCR(4, 2, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH0_RANK_REV2) },
{ PCI_DESCR(4, 3, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH0_TC_REV2) },
/* Channel 1 */
{ PCI_DESCR(5, 0, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH1_CTRL_REV2) },
{ PCI_DESCR(5, 1, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH1_ADDR_REV2) },
{ PCI_DESCR(5, 2, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH1_RANK_REV2) },
{ PCI_DESCR(5, 3, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH1_TC_REV2) },
/* Channel 2 */
{ PCI_DESCR(6, 0, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH2_CTRL_REV2) },
{ PCI_DESCR(6, 1, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH2_ADDR_REV2) },
{ PCI_DESCR(6, 2, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH2_RANK_REV2) },
{ PCI_DESCR(6, 3, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH2_TC_REV2) },
/* Generic Non-core registers */
{ PCI_DESCR(0, 0, PCI_DEVICE_ID_INTEL_LYNNFIELD_NONCORE_REV2) },
};
#define PCI_ID_TABLE_ENTRY(A) { .descr=A, .n_devs = ARRAY_SIZE(A) }
static const struct pci_id_table pci_dev_table[] = {
PCI_ID_TABLE_ENTRY(pci_dev_descr_i7core_nehalem),
PCI_ID_TABLE_ENTRY(pci_dev_descr_lynnfield),
PCI_ID_TABLE_ENTRY(pci_dev_descr_i7core_westmere),
{0,} /* 0 terminated list. */
};
/*
* pci_device_id table for which devices we are looking for
*/
static const struct pci_device_id i7core_pci_tbl[] = {
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_X58_HUB_MGMT)},
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LYNNFIELD_QPI_LINK0)},
{0,} /* 0 terminated list. */
};
/****************************************************************************
Ancillary status routines
****************************************************************************/
/* MC_CONTROL bits */
#define CH_ACTIVE(pvt, ch) ((pvt)->info.mc_control & (1 << (8 + ch)))
#define ECCx8(pvt) ((pvt)->info.mc_control & (1 << 1))
/* MC_STATUS bits */
#define ECC_ENABLED(pvt) ((pvt)->info.mc_status & (1 << 4))
#define CH_DISABLED(pvt, ch) ((pvt)->info.mc_status & (1 << ch))
/* MC_MAX_DOD read functions */
static inline int numdimms(u32 dimms)
{
return (dimms & 0x3) + 1;
}
static inline int numrank(u32 rank)
{
static const int ranks[] = { 1, 2, 4, -EINVAL };
return ranks[rank & 0x3];
}
static inline int numbank(u32 bank)
{
static const int banks[] = { 4, 8, 16, -EINVAL };
return banks[bank & 0x3];
}
static inline int numrow(u32 row)
{
static const int rows[] = {
1 << 12, 1 << 13, 1 << 14, 1 << 15,
1 << 16, -EINVAL, -EINVAL, -EINVAL,
};
return rows[row & 0x7];
}
static inline int numcol(u32 col)
{
static const int cols[] = {
1 << 10, 1 << 11, 1 << 12, -EINVAL,
};
return cols[col & 0x3];
}
static struct i7core_dev *get_i7core_dev(u8 socket)
{
struct i7core_dev *i7core_dev;
list_for_each_entry(i7core_dev, &i7core_edac_list, list) {
if (i7core_dev->socket == socket)
return i7core_dev;
}
return NULL;
}
static struct i7core_dev *alloc_i7core_dev(u8 socket,
const struct pci_id_table *table)
{
struct i7core_dev *i7core_dev;
i7core_dev = kzalloc(sizeof(*i7core_dev), GFP_KERNEL);
if (!i7core_dev)
return NULL;
i7core_dev->pdev = kcalloc(table->n_devs, sizeof(*i7core_dev->pdev),
GFP_KERNEL);
if (!i7core_dev->pdev) {
kfree(i7core_dev);
return NULL;
}
i7core_dev->socket = socket;
i7core_dev->n_devs = table->n_devs;
list_add_tail(&i7core_dev->list, &i7core_edac_list);
return i7core_dev;
}
static void free_i7core_dev(struct i7core_dev *i7core_dev)
{
list_del(&i7core_dev->list);
kfree(i7core_dev->pdev);
kfree(i7core_dev);
}
/****************************************************************************
Memory check routines
****************************************************************************/
static int get_dimm_config(struct mem_ctl_info *mci)
{
struct i7core_pvt *pvt = mci->pvt_info;
struct pci_dev *pdev;
int i, j;
enum edac_type mode;
enum mem_type mtype;
struct dimm_info *dimm;
/* Get data from the MC register, function 0 */
pdev = pvt->pci_mcr[0];
if (!pdev)
return -ENODEV;
/* Device 3 function 0 reads */
pci_read_config_dword(pdev, MC_CONTROL, &pvt->info.mc_control);
pci_read_config_dword(pdev, MC_STATUS, &pvt->info.mc_status);
pci_read_config_dword(pdev, MC_MAX_DOD, &pvt->info.max_dod);
pci_read_config_dword(pdev, MC_CHANNEL_MAPPER, &pvt->info.ch_map);
edac_dbg(0, "QPI %d control=0x%08x status=0x%08x dod=0x%08x map=0x%08x\n",
pvt->i7core_dev->socket, pvt->info.mc_control,
pvt->info.mc_status, pvt->info.max_dod, pvt->info.ch_map);
if (ECC_ENABLED(pvt)) {
edac_dbg(0, "ECC enabled with x%d SDCC\n", ECCx8(pvt) ? 8 : 4);
if (ECCx8(pvt))
mode = EDAC_S8ECD8ED;
else
mode = EDAC_S4ECD4ED;
} else {
edac_dbg(0, "ECC disabled\n");
mode = EDAC_NONE;
}
/* FIXME: need to handle the error codes */
edac_dbg(0, "DOD Max limits: DIMMS: %d, %d-ranked, %d-banked x%x x 0x%x\n",
numdimms(pvt->info.max_dod),
numrank(pvt->info.max_dod >> 2),
numbank(pvt->info.max_dod >> 4),
numrow(pvt->info.max_dod >> 6),
numcol(pvt->info.max_dod >> 9));
for (i = 0; i < NUM_CHANS; i++) {
u32 data, dimm_dod[3], value[8];
if (!pvt->pci_ch[i][0])
continue;
if (!CH_ACTIVE(pvt, i)) {
edac_dbg(0, "Channel %i is not active\n", i);
continue;
}
if (CH_DISABLED(pvt, i)) {
edac_dbg(0, "Channel %i is disabled\n", i);
continue;
}
/* Devices 4-6 function 0 */
pci_read_config_dword(pvt->pci_ch[i][0],
MC_CHANNEL_DIMM_INIT_PARAMS, &data);
if (data & THREE_DIMMS_PRESENT)
pvt->channel[i].is_3dimms_present = true;
if (data & SINGLE_QUAD_RANK_PRESENT)
pvt->channel[i].is_single_4rank = true;
if (data & QUAD_RANK_PRESENT)
pvt->channel[i].has_4rank = true;
if (data & REGISTERED_DIMM)
mtype = MEM_RDDR3;
else
mtype = MEM_DDR3;
/* Devices 4-6 function 1 */
pci_read_config_dword(pvt->pci_ch[i][1],
MC_DOD_CH_DIMM0, &dimm_dod[0]);
pci_read_config_dword(pvt->pci_ch[i][1],
MC_DOD_CH_DIMM1, &dimm_dod[1]);
pci_read_config_dword(pvt->pci_ch[i][1],
MC_DOD_CH_DIMM2, &dimm_dod[2]);
edac_dbg(0, "Ch%d phy rd%d, wr%d (0x%08x): %s%s%s%cDIMMs\n",
i,
RDLCH(pvt->info.ch_map, i), WRLCH(pvt->info.ch_map, i),
data,
pvt->channel[i].is_3dimms_present ? "3DIMMS " : "",
pvt->channel[i].is_3dimms_present ? "SINGLE_4R " : "",
pvt->channel[i].has_4rank ? "HAS_4R " : "",
(data & REGISTERED_DIMM) ? 'R' : 'U');
for (j = 0; j < 3; j++) {
u32 banks, ranks, rows, cols;
u32 size, npages;
if (!DIMM_PRESENT(dimm_dod[j]))
continue;
dimm = edac_get_dimm(mci, i, j, 0);
banks = numbank(MC_DOD_NUMBANK(dimm_dod[j]));
ranks = numrank(MC_DOD_NUMRANK(dimm_dod[j]));
rows = numrow(MC_DOD_NUMROW(dimm_dod[j]));
cols = numcol(MC_DOD_NUMCOL(dimm_dod[j]));
/* DDR3 has 8 I/O banks */
size = (rows * cols * banks * ranks) >> (20 - 3);
edac_dbg(0, "\tdimm %d %d MiB offset: %x, bank: %d, rank: %d, row: %#x, col: %#x\n",
j, size,
RANKOFFSET(dimm_dod[j]),
banks, ranks, rows, cols);
npages = MiB_TO_PAGES(size);
dimm->nr_pages = npages;
switch (banks) {
case 4:
dimm->dtype = DEV_X4;
break;
case 8:
dimm->dtype = DEV_X8;
break;
case 16:
dimm->dtype = DEV_X16;
break;
default:
dimm->dtype = DEV_UNKNOWN;
}
snprintf(dimm->label, sizeof(dimm->label),
"CPU#%uChannel#%u_DIMM#%u",
pvt->i7core_dev->socket, i, j);
dimm->grain = 8;
dimm->edac_mode = mode;
dimm->mtype = mtype;
}
pci_read_config_dword(pdev, MC_SAG_CH_0, &value[0]);
pci_read_config_dword(pdev, MC_SAG_CH_1, &value[1]);
pci_read_config_dword(pdev, MC_SAG_CH_2, &value[2]);
pci_read_config_dword(pdev, MC_SAG_CH_3, &value[3]);
pci_read_config_dword(pdev, MC_SAG_CH_4, &value[4]);
pci_read_config_dword(pdev, MC_SAG_CH_5, &value[5]);
pci_read_config_dword(pdev, MC_SAG_CH_6, &value[6]);
pci_read_config_dword(pdev, MC_SAG_CH_7, &value[7]);
edac_dbg(1, "\t[%i] DIVBY3\tREMOVED\tOFFSET\n", i);
for (j = 0; j < 8; j++)
edac_dbg(1, "\t\t%#x\t%#x\t%#x\n",
(value[j] >> 27) & 0x1,
(value[j] >> 24) & 0x7,
(value[j] & ((1 << 24) - 1)));
}
return 0;
}
/****************************************************************************
Error insertion routines
****************************************************************************/
#define to_mci(k) container_of(k, struct mem_ctl_info, dev)
/* The i7core has independent error injection features per channel.
However, to have a simpler code, we don't allow enabling error injection
on more than one channel.
Also, since a change at an inject parameter will be applied only at enable,
we're disabling error injection on all write calls to the sysfs nodes that
controls the error code injection.
*/
static int disable_inject(const struct mem_ctl_info *mci)
{
struct i7core_pvt *pvt = mci->pvt_info;
pvt->inject.enable = 0;
if (!pvt->pci_ch[pvt->inject.channel][0])
return -ENODEV;
pci_write_config_dword(pvt->pci_ch[pvt->inject.channel][0],
MC_CHANNEL_ERROR_INJECT, 0);
return 0;
}
/*
* i7core inject inject.section
*
* accept and store error injection inject.section value
* bit 0 - refers to the lower 32-byte half cacheline
* bit 1 - refers to the upper 32-byte half cacheline
*/
static ssize_t i7core_inject_section_store(struct device *dev,
struct device_attribute *mattr,
const char *data, size_t count)
{
struct mem_ctl_info *mci = to_mci(dev);
struct i7core_pvt *pvt = mci->pvt_info;
unsigned long value;
int rc;
if (pvt->inject.enable)
disable_inject(mci);
rc = kstrtoul(data, 10, &value);
if ((rc < 0) || (value > 3))
return -EIO;
pvt->inject.section = (u32) value;
return count;
}
static ssize_t i7core_inject_section_show(struct device *dev,
struct device_attribute *mattr,
char *data)
{
struct mem_ctl_info *mci = to_mci(dev);
struct i7core_pvt *pvt = mci->pvt_info;
return sprintf(data, "0x%08x\n", pvt->inject.section);
}
/*
* i7core inject.type
*
* accept and store error injection inject.section value
* bit 0 - repeat enable - Enable error repetition
* bit 1 - inject ECC error
* bit 2 - inject parity error
*/
static ssize_t i7core_inject_type_store(struct device *dev,
struct device_attribute *mattr,
const char *data, size_t count)
{
struct mem_ctl_info *mci = to_mci(dev);
struct i7core_pvt *pvt = mci->pvt_info;
unsigned long value;
int rc;
if (pvt->inject.enable)
disable_inject(mci);
rc = kstrtoul(data, 10, &value);
if ((rc < 0) || (value > 7))
return -EIO;
pvt->inject.type = (u32) value;
return count;
}
static ssize_t i7core_inject_type_show(struct device *dev,
struct device_attribute *mattr,
char *data)
{
struct mem_ctl_info *mci = to_mci(dev);
struct i7core_pvt *pvt = mci->pvt_info;
return sprintf(data, "0x%08x\n", pvt->inject.type);
}
/*
* i7core_inject_inject.eccmask_store
*
* The type of error (UE/CE) will depend on the inject.eccmask value:
* Any bits set to a 1 will flip the corresponding ECC bit
* Correctable errors can be injected by flipping 1 bit or the bits within
* a symbol pair (2 consecutive aligned 8-bit pairs - i.e. 7:0 and 15:8 or
* 23:16 and 31:24). Flipping bits in two symbol pairs will cause an
* uncorrectable error to be injected.
*/
static ssize_t i7core_inject_eccmask_store(struct device *dev,
struct device_attribute *mattr,
const char *data, size_t count)
{
struct mem_ctl_info *mci = to_mci(dev);
struct i7core_pvt *pvt = mci->pvt_info;
unsigned long value;
int rc;
if (pvt->inject.enable)
disable_inject(mci);
rc = kstrtoul(data, 10, &value);
if (rc < 0)
return -EIO;
pvt->inject.eccmask = (u32) value;
return count;
}
static ssize_t i7core_inject_eccmask_show(struct device *dev,
struct device_attribute *mattr,
char *data)
{
struct mem_ctl_info *mci = to_mci(dev);
struct i7core_pvt *pvt = mci->pvt_info;
return sprintf(data, "0x%08x\n", pvt->inject.eccmask);
}
/*
* i7core_addrmatch
*
* The type of error (UE/CE) will depend on the inject.eccmask value:
* Any bits set to a 1 will flip the corresponding ECC bit
* Correctable errors can be injected by flipping 1 bit or the bits within
* a symbol pair (2 consecutive aligned 8-bit pairs - i.e. 7:0 and 15:8 or
* 23:16 and 31:24). Flipping bits in two symbol pairs will cause an
* uncorrectable error to be injected.
*/
#define DECLARE_ADDR_MATCH(param, limit) \
static ssize_t i7core_inject_store_##param( \
struct device *dev, \
struct device_attribute *mattr, \
const char *data, size_t count) \
{ \
struct mem_ctl_info *mci = dev_get_drvdata(dev); \
struct i7core_pvt *pvt; \
long value; \
int rc; \
\
edac_dbg(1, "\n"); \
pvt = mci->pvt_info; \
\
if (pvt->inject.enable) \
disable_inject(mci); \
\
if (!strcasecmp(data, "any") || !strcasecmp(data, "any\n"))\
value = -1; \
else { \
rc = kstrtoul(data, 10, &value); \
if ((rc < 0) || (value >= limit)) \
return -EIO; \
} \
\
pvt->inject.param = value; \
\
return count; \
} \
\
static ssize_t i7core_inject_show_##param( \
struct device *dev, \
struct device_attribute *mattr, \
char *data) \
{ \
struct mem_ctl_info *mci = dev_get_drvdata(dev); \
struct i7core_pvt *pvt; \
\
pvt = mci->pvt_info; \
edac_dbg(1, "pvt=%p\n", pvt); \
if (pvt->inject.param < 0) \
return sprintf(data, "any\n"); \
else \
return sprintf(data, "%d\n", pvt->inject.param);\
}
#define ATTR_ADDR_MATCH(param) \
static DEVICE_ATTR(param, S_IRUGO | S_IWUSR, \
i7core_inject_show_##param, \
i7core_inject_store_##param)
DECLARE_ADDR_MATCH(channel, 3);
DECLARE_ADDR_MATCH(dimm, 3);
DECLARE_ADDR_MATCH(rank, 4);
DECLARE_ADDR_MATCH(bank, 32);
DECLARE_ADDR_MATCH(page, 0x10000);
DECLARE_ADDR_MATCH(col, 0x4000);
ATTR_ADDR_MATCH(channel);
ATTR_ADDR_MATCH(dimm);
ATTR_ADDR_MATCH(rank);
ATTR_ADDR_MATCH(bank);
ATTR_ADDR_MATCH(page);
ATTR_ADDR_MATCH(col);
static int write_and_test(struct pci_dev *dev, const int where, const u32 val)
{
u32 read;
int count;
edac_dbg(0, "setting pci %02x:%02x.%x reg=%02x value=%08x\n",
dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn),
where, val);
for (count = 0; count < 10; count++) {
if (count)
msleep(100);
pci_write_config_dword(dev, where, val);
pci_read_config_dword(dev, where, &read);
if (read == val)
return 0;
}
i7core_printk(KERN_ERR, "Error during set pci %02x:%02x.%x reg=%02x "
"write=%08x. Read=%08x\n",
dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn),
where, val, read);
return -EINVAL;
}
/*
* This routine prepares the Memory Controller for error injection.
* The error will be injected when some process tries to write to the
* memory that matches the given criteria.
* The criteria can be set in terms of a mask where dimm, rank, bank, page
* and col can be specified.
* A -1 value for any of the mask items will make the MCU to ignore
* that matching criteria for error injection.
*
* It should be noticed that the error will only happen after a write operation
* on a memory that matches the condition. if REPEAT_EN is not enabled at
* inject mask, then it will produce just one error. Otherwise, it will repeat
* until the injectmask would be cleaned.
*
* FIXME: This routine assumes that MAXNUMDIMMS value of MC_MAX_DOD
* is reliable enough to check if the MC is using the
* three channels. However, this is not clear at the datasheet.
*/
static ssize_t i7core_inject_enable_store(struct device *dev,
struct device_attribute *mattr,
const char *data, size_t count)
{
struct mem_ctl_info *mci = to_mci(dev);
struct i7core_pvt *pvt = mci->pvt_info;
u32 injectmask;
u64 mask = 0;
int rc;
long enable;
if (!pvt->pci_ch[pvt->inject.channel][0])
return 0;
rc = kstrtoul(data, 10, &enable);
if ((rc < 0))
return 0;
if (enable) {
pvt->inject.enable = 1;
} else {
disable_inject(mci);
return count;
}
/* Sets pvt->inject.dimm mask */
if (pvt->inject.dimm < 0)
mask |= 1LL << 41;
else {
if (pvt->channel[pvt->inject.channel].dimms > 2)
mask |= (pvt->inject.dimm & 0x3LL) << 35;
else
mask |= (pvt->inject.dimm & 0x1LL) << 36;
}
/* Sets pvt->inject.rank mask */
if (pvt->inject.rank < 0)
mask |= 1LL << 40;
else {
if (pvt->channel[pvt->inject.channel].dimms > 2)
mask |= (pvt->inject.rank & 0x1LL) << 34;
else
mask |= (pvt->inject.rank & 0x3LL) << 34;
}
/* Sets pvt->inject.bank mask */
if (pvt->inject.bank < 0)
mask |= 1LL << 39;
else
mask |= (pvt->inject.bank & 0x15LL) << 30;
/* Sets pvt->inject.page mask */
if (pvt->inject.page < 0)
mask |= 1LL << 38;
else
mask |= (pvt->inject.page & 0xffff) << 14;
/* Sets pvt->inject.column mask */
if (pvt->inject.col < 0)
mask |= 1LL << 37;
else
mask |= (pvt->inject.col & 0x3fff);
/*
* bit 0: REPEAT_EN
* bits 1-2: MASK_HALF_CACHELINE
* bit 3: INJECT_ECC
* bit 4: INJECT_ADDR_PARITY
*/
injectmask = (pvt->inject.type & 1) |
(pvt->inject.section & 0x3) << 1 |
(pvt->inject.type & 0x6) << (3 - 1);
/* Unlock writes to registers - this register is write only */
pci_write_config_dword(pvt->pci_noncore,
MC_CFG_CONTROL, 0x2);
write_and_test(pvt->pci_ch[pvt->inject.channel][0],
MC_CHANNEL_ADDR_MATCH, mask);
write_and_test(pvt->pci_ch[pvt->inject.channel][0],
MC_CHANNEL_ADDR_MATCH + 4, mask >> 32L);
write_and_test(pvt->pci_ch[pvt->inject.channel][0],
MC_CHANNEL_ERROR_MASK, pvt->inject.eccmask);
write_and_test(pvt->pci_ch[pvt->inject.channel][0],
MC_CHANNEL_ERROR_INJECT, injectmask);
/*
* This is something undocumented, based on my tests