/* Intel 7 core Memory Controller kernel module (Nehalem) * * This file may be distributed under the terms of the * GNU General Public License version 2 only. * * Copyright (c) 2009 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 #include #include #include #include #include #include #include #include #include "edac_core.h" /* To use the new pci_[read/write]_config_qword instead of two dword */ #define USE_QWORD 0 /* * Alter this version for the module when modifications are made */ #define I7CORE_REVISION " Ver: 1.0.0 " __DATE__ #define EDAC_MOD_STR "i7core_edac" /* HACK: temporary, just to enable all logs, for now */ #undef debugf0 #define debugf0(fmt, arg...) edac_printk(KERN_INFO, "i7core", fmt, ##arg) /* * 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 /* 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 inicated 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 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 { u32 ranks; u32 dimms; }; struct pci_id_descr { int dev; int func; int dev_id; struct pci_dev *pdev; }; struct i7core_pvt { 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_info info; struct i7core_inject inject; struct i7core_channel channel[NUM_CHANS]; int channels; /* Number of active channels */ int ce_count_available; unsigned long ce_count[MAX_DIMMS]; /* ECC corrected errors counts per dimm */ int last_ce_count[MAX_DIMMS]; /* mcelog glue */ struct edac_mce edac_mce; struct mce mce_entry[MCE_LOG_LEN]; unsigned mce_count; spinlock_t mce_lock; }; /* Device name and register DID (Device ID) */ struct i7core_dev_info { const char *ctl_name; /* name for this device */ u16 fsb_mapping_errors; /* DID for the branchmap,control */ }; #define PCI_DESCR(device, function, device_id) \ .dev = (device), \ .func = (function), \ .dev_id = (device_id) struct pci_id_descr pci_devs[] = { /* Memory controller */ { PCI_DESCR(3, 0, PCI_DEVICE_ID_INTEL_I7_MCR) }, { PCI_DESCR(3, 1, PCI_DEVICE_ID_INTEL_I7_MC_TAD) }, { PCI_DESCR(3, 2, PCI_DEVICE_ID_INTEL_I7_MC_RAS) }, /* if RDIMM is supported */ { PCI_DESCR(3, 4, PCI_DEVICE_ID_INTEL_I7_MC_TEST) }, /* Generic Non-core registers */ { PCI_DESCR(0, 0, PCI_DEVICE_ID_INTEL_I7_NOCORE) }, /* 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) }, }; #define N_DEVS ARRAY_SIZE(pci_devs) /* * pci_device_id table for which devices we are looking for * This should match the first device at pci_devs table */ static const struct pci_device_id i7core_pci_tbl[] __devinitdata = { {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_I7_MCR)}, {0,} /* 0 terminated list. */ }; /* Table of devices attributes supported by this driver */ static const struct i7core_dev_info i7core_devs[] = { { .ctl_name = "i7 Core", .fsb_mapping_errors = PCI_DEVICE_ID_INTEL_I7_MCR, }, }; static struct edac_pci_ctl_info *i7core_pci; /**************************************************************************** Anciliary 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 << 3)) #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 int ranks[4] = { 1, 2, 4, -EINVAL }; return ranks[rank & 0x3]; } static inline int numbank(u32 bank) { static int banks[4] = { 4, 8, 16, -EINVAL }; return banks[bank & 0x3]; } static inline int numrow(u32 row) { static int rows[8] = { 1 << 12, 1 << 13, 1 << 14, 1 << 15, 1 << 16, -EINVAL, -EINVAL, -EINVAL, }; return rows[row & 0x7]; } static inline int numcol(u32 col) { static int cols[8] = { 1 << 10, 1 << 11, 1 << 12, -EINVAL, }; return cols[col & 0x3]; } /**************************************************************************** Memory check routines ****************************************************************************/ static struct pci_dev *get_pdev_slot_func(int slot, int func) { int i; for (i = 0; i < N_DEVS; i++) { if (!pci_devs[i].pdev) continue; if (PCI_SLOT(pci_devs[i].pdev->devfn) == slot && PCI_FUNC(pci_devs[i].pdev->devfn) == func) { return pci_devs[i].pdev; } } return NULL; } static int i7core_get_active_channels(int *channels, int *csrows) { struct pci_dev *pdev = NULL; int i, j; u32 status, control; *channels = 0; *csrows = 0; pdev = get_pdev_slot_func(3, 0); if (!pdev) { i7core_printk(KERN_ERR, "Couldn't find fn 3.0!!!\n"); return -ENODEV; } /* Device 3 function 0 reads */ pci_read_config_dword(pdev, MC_STATUS, &status); pci_read_config_dword(pdev, MC_CONTROL, &control); for (i = 0; i < NUM_CHANS; i++) { u32 dimm_dod[3]; /* Check if the channel is active */ if (!(control & (1 << (8 + i)))) continue; /* Check if the channel is disabled */ if (status & (1 << i)) continue; pdev = get_pdev_slot_func(i + 4, 1); if (!pdev) { i7core_printk(KERN_ERR, "Couldn't find fn %d.%d!!!\n", i + 4, 1); return -ENODEV; } /* Devices 4-6 function 1 */ pci_read_config_dword(pdev, MC_DOD_CH_DIMM0, &dimm_dod[0]); pci_read_config_dword(pdev, MC_DOD_CH_DIMM1, &dimm_dod[1]); pci_read_config_dword(pdev, MC_DOD_CH_DIMM2, &dimm_dod[2]); (*channels)++; for (j = 0; j < 3; j++) { if (!DIMM_PRESENT(dimm_dod[j])) continue; (*csrows)++; } } debugf0("Number of active channels: %d\n", *channels); return 0; } static int get_dimm_config(struct mem_ctl_info *mci) { struct i7core_pvt *pvt = mci->pvt_info; struct csrow_info *csr; struct pci_dev *pdev; int i, j, csrow = 0; unsigned long last_page = 0; enum edac_type mode; enum mem_type mtype; /* 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); debugf0("MC control=0x%08x status=0x%08x dod=0x%08x map=0x%08x\n", pvt->info.mc_control, pvt->info.mc_status, pvt->info.max_dod, pvt->info.ch_map); if (ECC_ENABLED(pvt)) { debugf0("ECC enabled with x%d SDCC\n", ECCx8(pvt) ? 8 : 4); if (ECCx8(pvt)) mode = EDAC_S8ECD8ED; else mode = EDAC_S4ECD4ED; } else { debugf0("ECC disabled\n"); mode = EDAC_NONE; } /* FIXME: need to handle the error codes */ debugf0("DOD Max limits: DIMMS: %d, %d-ranked, %d-banked\n", numdimms(pvt->info.max_dod), numrank(pvt->info.max_dod >> 2), numbank(pvt->info.max_dod >> 4)); debugf0("DOD Max rows x colums = 0x%x x 0x%x\n", numrow(pvt->info.max_dod >> 6), numcol(pvt->info.max_dod >> 9)); debugf0("Memory channel configuration:\n"); for (i = 0; i < NUM_CHANS; i++) { u32 data, dimm_dod[3], value[8]; if (!CH_ACTIVE(pvt, i)) { debugf0("Channel %i is not active\n", i); continue; } if (CH_DISABLED(pvt, i)) { debugf0("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); pvt->channel[i].ranks = (data & QUAD_RANK_PRESENT) ? 4 : 2; if (data & REGISTERED_DIMM) mtype = MEM_RDDR3; else mtype = MEM_DDR3; #if 0 if (data & THREE_DIMMS_PRESENT) pvt->channel[i].dimms = 3; else if (data & SINGLE_QUAD_RANK_PRESENT) pvt->channel[i].dimms = 1; else pvt->channel[i].dimms = 2; #endif /* 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]); debugf0("Ch%d phy rd%d, wr%d (0x%08x): " "%d ranks, %cDIMMs\n", i, RDLCH(pvt->info.ch_map, i), WRLCH(pvt->info.ch_map, i), data, pvt->channel[i].ranks, (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; 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); pvt->channel[i].dimms++; debugf0("\tdimm %d (0x%08x) %d Mb offset: %x, " "numbank: %d,\n\t\t" "numrank: %d, numrow: %#x, numcol: %#x\n", j, dimm_dod[j], size, RANKOFFSET(dimm_dod[j]), banks, ranks, rows, cols); #if PAGE_SHIFT > 20 npages = size >> (PAGE_SHIFT - 20); #else npages = size << (20 - PAGE_SHIFT); #endif csr = &mci->csrows[csrow]; csr->first_page = last_page + 1; last_page += npages; csr->last_page = last_page; csr->nr_pages = npages; csr->page_mask = 0; csr->grain = 8; csr->csrow_idx = csrow; csr->nr_channels = 1; csr->channels[0].chan_idx = i; csr->channels[0].ce_count = 0; switch (banks) { case 4: csr->dtype = DEV_X4; break; case 8: csr->dtype = DEV_X8; break; case 16: csr->dtype = DEV_X16; break; default: csr->dtype = DEV_UNKNOWN; } csr->edac_mode = mode; csr->mtype = mtype; csrow++; } 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]); debugf0("\t[%i] DIVBY3\tREMOVED\tOFFSET\n", i); for (j = 0; j < 8; j++) debugf0("\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 ****************************************************************************/ /* 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(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_MASK, 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 mem_ctl_info *mci, const char *data, size_t count) { struct i7core_pvt *pvt = mci->pvt_info; unsigned long value; int rc; if (pvt->inject.enable) disable_inject(mci); rc = strict_strtoul(data, 10, &value); if ((rc < 0) || (value > 3)) return 0; pvt->inject.section = (u32) value; return count; } static ssize_t i7core_inject_section_show(struct mem_ctl_info *mci, char *data) { 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 mem_ctl_info *mci, const char *data, size_t count) { struct i7core_pvt *pvt = mci->pvt_info; unsigned long value; int rc; if (pvt->inject.enable) disable_inject(mci); rc = strict_strtoul(data, 10, &value); if ((rc < 0) || (value > 7)) return 0; pvt->inject.type = (u32) value; return count; } static ssize_t i7core_inject_type_show(struct mem_ctl_info *mci, char *data) { 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 mem_ctl_info *mci, const char *data, size_t count) { struct i7core_pvt *pvt = mci->pvt_info; unsigned long value; int rc; if (pvt->inject.enable) disable_inject(mci); rc = strict_strtoul(data, 10, &value); if (rc < 0) return 0; pvt->inject.eccmask = (u32) value; return count; } static ssize_t i7core_inject_eccmask_show(struct mem_ctl_info *mci, char *data) { 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. */ static ssize_t i7core_inject_addrmatch_store(struct mem_ctl_info *mci, const char *data, size_t count) { struct i7core_pvt *pvt = mci->pvt_info; char *cmd, *val; long value; int rc; if (pvt->inject.enable) disable_inject(mci); do { cmd = strsep((char **) &data, ":"); if (!cmd) break; val = strsep((char **) &data, " \n\t"); if (!val) return cmd - data; if (!strcasecmp(val, "any")) value = -1; else { rc = strict_strtol(val, 10, &value); if ((rc < 0) || (value < 0)) return cmd - data; } if (!strcasecmp(cmd, "channel")) { if (value < 3) pvt->inject.channel = value; else return cmd - data; } else if (!strcasecmp(cmd, "dimm")) { if (value < 4) pvt->inject.dimm = value; else return cmd - data; } else if (!strcasecmp(cmd, "rank")) { if (value < 4) pvt->inject.rank = value; else return cmd - data; } else if (!strcasecmp(cmd, "bank")) { if (value < 4) pvt->inject.bank = value; else return cmd - data; } else if (!strcasecmp(cmd, "page")) { if (value <= 0xffff) pvt->inject.page = value; else return cmd - data; } else if (!strcasecmp(cmd, "col") || !strcasecmp(cmd, "column")) { if (value <= 0x3fff) pvt->inject.col = value; else return cmd - data; } } while (1); return count; } static ssize_t i7core_inject_addrmatch_show(struct mem_ctl_info *mci, char *data) { struct i7core_pvt *pvt = mci->pvt_info; char channel[4], dimm[4], bank[4], rank[4], page[7], col[7]; if (pvt->inject.channel < 0) sprintf(channel, "any"); else sprintf(channel, "%d", pvt->inject.channel); if (pvt->inject.dimm < 0) sprintf(dimm, "any"); else sprintf(dimm, "%d", pvt->inject.dimm); if (pvt->inject.bank < 0) sprintf(bank, "any"); else sprintf(bank, "%d", pvt->inject.bank); if (pvt->inject.rank < 0) sprintf(rank, "any"); else sprintf(rank, "%d", pvt->inject.rank); if (pvt->inject.page < 0) sprintf(page, "any"); else sprintf(page, "0x%04x", pvt->inject.page); if (pvt->inject.col < 0) sprintf(col, "any"); else sprintf(col, "0x%04x", pvt->inject.col); return sprintf(data, "channel: %s\ndimm: %s\nbank: %s\n" "rank: %s\npage: %s\ncolumn: %s\n", channel, dimm, bank, rank, page, col); } /* * 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 mem_ctl_info *mci, const char *data, size_t count) { 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 = strict_strtoul(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 |= 1L << 41; else { if (pvt->channel[pvt->inject.channel].dimms > 2) mask |= (pvt->inject.dimm & 0x3L) << 35; else mask |= (pvt->inject.dimm & 0x1L) << 36; } /* Sets pvt->inject.rank mask */ if (pvt->inject.rank < 0) mask |= 1L << 40; else { if (pvt->channel[pvt->inject.channel].dimms > 2) mask |= (pvt->inject.rank & 0x1L) << 34; else mask |= (pvt->inject.rank & 0x3L) << 34; } /* Sets pvt->inject.bank mask */ if (pvt->inject.bank < 0) mask |= 1L << 39; else mask |= (pvt->inject.bank & 0x15L) << 30; /* Sets pvt->inject.page mask */ if (pvt->inject.page < 0) mask |= 1L << 38; else mask |= (pvt->inject.page & 0xffffL) << 14; /* Sets pvt->inject.column mask */ if (pvt->inject.col < 0) mask |= 1L << 37; else mask |= (pvt->inject.col & 0x3fffL); /* Unlock writes to registers */ pci_write_config_dword(pvt->pci_noncore, MC_CFG_CONTROL, 0x2); msleep(100); /* Zeroes error count registers */ pci_write_config_dword(pvt->pci_mcr[4], MC_TEST_ERR_RCV1, 0); pci_write_config_dword(pvt->pci_mcr[4], MC_TEST_ERR_RCV0, 0); pvt->ce_count_available = 0; #if USE_QWORD pci_write_config_qword(pvt->pci_ch[pvt->inject.channel][0], MC_CHANNEL_ADDR_MATCH, mask); #else pci_write_config_dword(pvt->pci_ch[pvt->inject.channel][0], MC_CHANNEL_ADDR_MATCH, mask); pci_write_config_dword(pvt->pci_ch[pvt->inject.channel][0], MC_CHANNEL_ADDR_MATCH + 4, mask >> 32L); #endif #if 1 #if USE_QWORD u64 rdmask; pci_read_config_qword(pvt->pci_ch[pvt->inject.channel][0], MC_CHANNEL_ADDR_MATCH, &rdmask); debugf0("Inject addr match write 0x%016llx, read: 0x%016llx\n", mask, rdmask); #else u32 rdmask1, rdmask2; pci_read_config_dword(pvt->pci_ch[pvt->inject.channel][0], MC_CHANNEL_ADDR_MATCH, &rdmask1); pci_read_config_dword(pvt->pci_ch[pvt->inject.channel][0], MC_CHANNEL_ADDR_MATCH + 4, &rdmask2); debugf0("Inject addr match write 0x%016llx, read: 0x%08x 0x%08x\n", mask, rdmask1, rdmask2); #endif #endif pci_write_config_dword(pvt->pci_ch[pvt->inject.channel][0], MC_CHANNEL_ERROR_MASK, pvt->inject.eccmask); /* * 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); pci_write_config_dword(pvt->pci_ch[pvt->inject.channel][0], MC_CHANNEL_ERROR_MASK, injectmask); #if 0 /* lock writes to registers */ pci_write_config_dword(pvt->pci_noncore, MC_CFG_CONTROL, 0); #endif debugf0("Error inject addr match 0x%016llx, ecc 0x%08x," " inject 0x%08x\n", mask, pvt->inject.eccmask, injectmask); return count; } static ssize_t i7core_inject_enable_show(struct mem_ctl_info *mci, char *data) { struct i7core_pvt *pvt = mci->pvt_info; u32 injectmask; pci_read_config_dword(pvt->pci_ch[pvt->inject.channel][0], MC_CHANNEL_ERROR_MASK, &injectmask); debugf0("Inject error read: 0x%018x\n", injectmask); if (injectmask & 0x0c) pvt->inject.enable = 1; return sprintf(data, "%d\n", pvt->inject.enable); } static ssize_t i7core_ce_regs_show(struct mem_ctl_info *mci, char *data) { struct i7core_pvt *pvt = mci->pvt_info; if (!pvt->ce_count_available) return sprintf(data, "unavailable\n"); return sprintf(data, "dimm0: %lu\ndimm1: %lu\ndimm2: %lu\n", pvt->ce_count[0], pvt->ce_count[1], pvt->ce_count[2]); } /* * Sysfs struct */ static struct mcidev_sysfs_attribute i7core_inj_attrs[] = { { .attr = { .name = "inject_section", .mode = (S_IRUGO | S_IWUSR) }, .show = i7core_inject_section_show, .store = i7core_inject_section_store, }, { .attr = { .name = "inject_type", .mode = (S_IRUGO | S_IWUSR) }, .show = i7core_inject_type_show, .store = i7core_inject_type_store, }, { .attr = { .name = "inject_eccmask", .mode = (S_IRUGO | S_IWUSR) }, .show = i7core_inject_eccmask_show, .store = i7core_inject_eccmask_store, }, { .attr = { .name = "inject_addrmatch", .mode = (S_IRUGO | S_IWUSR) }, .show = i7core_inject_addrmatch_show, .store = i7core_inject_addrmatch_store, }, { .attr = { .name = "inject_enable", .mode = (S_IRUGO | S_IWUSR) }, .show = i7core_inject_enable_show, .store = i7core_inject_enable_store, }, { .attr = { .name = "corrected_error_counts", .mode = (S_IRUGO | S_IWUSR) }, .show = i7core_ce_regs_show, .store = NULL, }, }; /**************************************************************************** Device initialization routines: put/get, init/exit ****************************************************************************/ /* * i7core_put_devices 'put' all the devices that we have * reserved via 'get' */ static void i7core_put_devices(void) { int i; for (i = 0; i < N_DEVS; i++) pci_dev_put(pci_devs[i].pdev); } /* * i7core_get_devices Find and perform 'get' operation on the MCH's * device/functions we want to reference for this driver * * Need to 'get' device 16 func 1 and func 2 */ static int i7core_get_devices(void) { int rc, i; struct pci_dev *pdev = NULL; for (i = 0; i < N_DEVS; i++) { pdev = pci_get_device(PCI_VENDOR_ID_INTEL, pci_devs[i].dev_id, NULL); if (likely(pdev)) pci_devs[i].pdev = pdev; else { i7core_printk(KERN_ERR, "Device not found: PCI ID %04x:%04x " "(dev %d, func %d)\n", PCI_VENDOR_ID_INTEL, pci_devs[i].dev_id, pci_devs[i].dev, pci_devs[i].func); /* Dev 3 function 2 only exists on chips with RDIMMs */ if ((pci_devs[i].dev == 3) && (pci_devs[i].func == 2)) continue; /* End of list, leave */ rc = -ENODEV; goto error; } /* Sanity check */ if (unlikely(PCI_SLOT(pdev->devfn) != pci_devs[i].dev || PCI_FUNC(pdev->devfn) != pci_devs[i].func)) { i7core_printk(KERN_ERR, "Device PCI ID %04x:%04x " "has fn %d.%d instead of fn %d.%d\n", PCI_VENDOR_ID_INTEL, pci_devs[i].dev_id, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), pci_devs[i].dev, pci_devs[i].func); rc = -EINVAL; goto error; } /* Be sure that the device is enabled */ rc = pci_enable_device(pdev); if (unlikely(rc < 0)) { i7core_printk(KERN_ERR, "Couldn't enable PCI ID %04x:%04x " "fn %d.%d\n", PCI_VENDOR_ID_INTEL, pci_devs[i].dev_id, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)); goto error; } i7core_printk(KERN_INFO, "Registered device %0x:%0x fn %d.%d\n", PCI_VENDOR_ID_INTEL, pci_devs[i].dev_id, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)); } return 0; error: i7core_put_devices(); return -EINVAL; } static int mci_bind_devs(struct mem_ctl_info *mci) { struct i7core_pvt *pvt = mci->pvt_info; struct pci_dev *pdev; int i, func, slot; for (i = 0; i < N_DEVS; i++) { pdev = pci_devs[i].pdev; if (!pdev) continue; func = PCI_FUNC(pdev->devfn); slot = PCI_SLOT(pdev->devfn); if (slot == 3) { if (unlikely(func > MAX_MCR_FUNC)) goto error; pvt->pci_mcr[func] = pdev; } else if (likely(slot >= 4 && slot < 4 + NUM_CHANS)) { if (unlikely(func > MAX_CHAN_FUNC)) goto error; pvt->pci_ch[slot - 4][func] = pdev; } else if (!slot && !func) pvt->pci_noncore = pdev; else goto error; debugf0("Associated fn %d.%d, dev = %p\n", PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), pdev); } return 0; error: i7core_printk(KERN_ERR, "Device %d, function %d " "is out of the expected range\n", slot, func); return -EINVAL; } /**************************************************************************** Error check routines ****************************************************************************/ /* This function is based on the device 3 function 4 registers as described on: * 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 */ static void check_mc_test_err(struct mem_ctl_info *mci) { struct i7core_pvt *pvt = mci->pvt_info; u32 rcv1, rcv0; int new0, new1, new2; if (!pvt->pci_mcr[4]) { debugf0("%s MCR registers not found\n",__func__); return; } /* Corrected error reads */ pci_read_config_dword(pvt->pci_mcr[4], MC_TEST_ERR_RCV1, &rcv1); pci_read_config_dword(pvt->pci_mcr[4], MC_TEST_ERR_RCV0, &rcv0); /* Store the new values */ new2 = DIMM2_COR_ERR(rcv1); new1 = DIMM1_COR_ERR(rcv0); new0 = DIMM0_COR_ERR(rcv0); #if 0 debugf2("%s CE rcv1=0x%08x rcv0=0x%08x, %d %d %d\n", (pvt->ce_count_available ? "UPDATE" : "READ"), rcv1, rcv0, new0, new1, new2); #endif /* Updates CE counters if it is not the first time here */ if (pvt->ce_count_available) { /* Updates CE counters */ int add0, add1, add2; add2 = new2 - pvt->last_ce_count[2]; add1 = new1 - pvt->last_ce_count[1]; add0 = new0 - pvt->last_ce_count[0]; if (add2 < 0) add2 += 0x7fff; pvt->ce_count[2] += add2; if (add1 < 0) add1 += 0x7fff; pvt->ce_count[1] += add1; if (add0 < 0) add0 += 0x7fff; pvt->ce_count[0] += add0; } else pvt->ce_count_available = 1; /* Store the new values */ pvt->last_ce_count[2] = new2; pvt->last_ce_count[1] = new1; pvt->last_ce_count[0] = new0; } static void i7core_mce_output_error(struct mem_ctl_info *mci, struct mce *m) { debugf0("CPU %d: Machine Check Exception: %16Lx" "Bank %d: %016Lx\n", m->cpu, m->mcgstatus, m->bank, m->status); if (m->ip) { debugf0("RIP%s %02x:<%016Lx>\n", !(m->mcgstatus & MCG_STATUS_EIPV) ? " !INEXACT!" : "", m->cs, m->ip); } printk(KERN_EMERG "TSC %llx ", m->tsc); if (m->addr) printk("ADDR %llx ", m->addr); if (m->misc) printk("MISC %llx ", m->misc); #if 0 snprintf(msg, sizeof(msg), "%s (Branch=%d DRAM-Bank=%d Buffer ID = %d RDWR=%s " "RAS=%d CAS=%d %s Err=0x%lx (%s))", type, branch >> 1, bank, buf_id, rdwr_str(rdwr), ras, cas, type, allErrors, error_name[errnum]); /* Call the helper to output message */ edac_mc_handle_fbd_ue(mci, rank, channel, channel + 1, msg); #endif } /* * i7core_check_error Retrieve and process errors reported by the * hardware. Called by the Core module. */ static void i7core_check_error(struct mem_ctl_info *mci) { struct i7core_pvt *pvt = mci->pvt_info; int i; unsigned count = 0; struct mce *m = NULL; unsigned long flags; debugf0(__FILE__ ": %s()\n", __func__); /* Copy all mce errors into a temporary buffer */ spin_lock_irqsave(&pvt->mce_lock, flags); if (pvt->mce_count) { m = kmalloc(sizeof(*m) * pvt->mce_count, GFP_ATOMIC); if (m) { count = pvt->mce_count; memcpy(m, &pvt->mce_entry, sizeof(*m) * count); } pvt->mce_count = 0; } spin_unlock_irqrestore(&pvt->mce_lock, flags); /* proccess mcelog errors */ for (i = 0; i < count; i++) i7core_mce_output_error(mci, &m[i]); kfree(m); /* check memory count errors */ check_mc_test_err(mci); } /* * i7core_mce_check_error Replicates mcelog routine to get errors * This routine simply queues mcelog errors, and * return. The error itself should be handled later * by i7core_check_error. */ static int i7core_mce_check_error(void *priv, struct mce *mce) { struct i7core_pvt *pvt = priv; unsigned long flags; debugf0(__FILE__ ": %s()\n", __func__); spin_lock_irqsave(&pvt->mce_lock, flags); if (pvt->mce_count < MCE_LOG_LEN) { memcpy(&pvt->mce_entry[pvt->mce_count], mce, sizeof(*mce)); pvt->mce_count++; } spin_unlock_irqrestore(&pvt->mce_lock, flags); /* Advice mcelog that the error were handled */ // return 1; return 0; // Let's duplicate the log } /* * i7core_probe Probe for ONE instance of device to see if it is * present. * return: * 0 for FOUND a device * < 0 for error code */ static int __devinit i7core_probe(struct pci_dev *pdev, const struct pci_device_id *id) { struct mem_ctl_info *mci; struct i7core_pvt *pvt; int num_channels; int num_csrows; int dev_idx = id->driver_data; int rc; if (unlikely(dev_idx >= ARRAY_SIZE(i7core_devs))) return -EINVAL; /* get the pci devices we want to reserve for our use */ rc = i7core_get_devices(); if (unlikely(rc < 0)) return rc; /* Check the number of active and not disabled channels */ rc = i7core_get_active_channels(&num_channels, &num_csrows); if (unlikely(rc < 0)) goto fail0; /* allocate a new MC control structure */ mci = edac_mc_alloc(sizeof(*pvt), num_csrows, num_channels, 0); if (unlikely(!mci)) { rc = -ENOMEM; goto fail0; } debugf0("MC: " __FILE__ ": %s(): mci = %p\n", __func__, mci); mci->dev = &pdev->dev; /* record ptr to the generic device */ pvt = mci->pvt_info; memset(pvt, 0, sizeof(*pvt)); mci->mc_idx = 0; /* * FIXME: how to handle RDDR3 at MCI level? It is possible to have * Mixed RDDR3/UDDR3 with Nehalem, provided that they are on different * memory channels */ mci->mtype_cap = MEM_FLAG_DDR3; mci->edac_ctl_cap = EDAC_FLAG_NONE; mci->edac_cap = EDAC_FLAG_NONE; mci->mod_name = "i7core_edac.c"; mci->mod_ver = I7CORE_REVISION; mci->ctl_name = i7core_devs[dev_idx].ctl_name; mci->dev_name = pci_name(pdev); mci->ctl_page_to_phys = NULL; mci->mc_driver_sysfs_attributes = i7core_inj_attrs; /* Set the function pointer to an actual operation function */ mci->edac_check = i7core_check_error; /* Store pci devices at mci for faster access */ rc = mci_bind_devs(mci); if (unlikely(rc < 0)) goto fail1; /* Get dimm basic config */ get_dimm_config(mci); /* add this new MC control structure to EDAC's list of MCs */ if (unlikely(edac_mc_add_mc(mci))) { debugf0("MC: " __FILE__ ": %s(): failed edac_mc_add_mc()\n", __func__); /* FIXME: perhaps some code should go here that disables error * reporting if we just enabled it */ rc = -EINVAL; goto fail1; } /* allocating generic PCI control info */ i7core_pci = edac_pci_create_generic_ctl(&pdev->dev, EDAC_MOD_STR); if (unlikely(!i7core_pci)) { printk(KERN_WARNING "%s(): Unable to create PCI control\n", __func__); printk(KERN_WARNING "%s(): PCI error report via EDAC not setup\n", __func__); } /* Default error mask is any memory */ pvt->inject.channel = 0; pvt->inject.dimm = -1; pvt->inject.rank = -1; pvt->inject.bank = -1; pvt->inject.page = -1; pvt->inject.col = -1; /* Registers on edac_mce in order to receive memory errors */ pvt->edac_mce.priv = pvt; pvt->edac_mce.check_error = i7core_mce_check_error; spin_lock_init(&pvt->mce_lock); rc = edac_mce_register(&pvt->edac_mce); if (unlikely (rc < 0)) { debugf0("MC: " __FILE__ ": %s(): failed edac_mce_register()\n", __func__); goto fail1; } i7core_printk(KERN_INFO, "Driver loaded.\n"); return 0; fail1: edac_mc_free(mci); fail0: i7core_put_devices(); return rc; } /* * i7core_remove destructor for one instance of device * */ static void __devexit i7core_remove(struct pci_dev *pdev) { struct mem_ctl_info *mci; struct i7core_pvt *pvt; debugf0(__FILE__ ": %s()\n", __func__); if (i7core_pci) edac_pci_release_generic_ctl(i7core_pci); mci = edac_mc_del_mc(&pdev->dev); if (!mci) return; /* Unregisters on edac_mce in order to receive memory errors */ pvt = mci->pvt_info; edac_mce_unregister(&pvt->edac_mce); /* retrieve references to resources, and free those resources */ i7core_put_devices(); edac_mc_free(mci); } MODULE_DEVICE_TABLE(pci, i7core_pci_tbl); /* * i7core_driver pci_driver structure for this module * */ static struct pci_driver i7core_driver = { .name = "i7core_edac", .probe = i7core_probe, .remove = __devexit_p(i7core_remove), .id_table = i7core_pci_tbl, }; /* * i7core_init Module entry function * Try to initialize this module for its devices */ static int __init i7core_init(void) { int pci_rc; debugf2("MC: " __FILE__ ": %s()\n", __func__); /* Ensure that the OPSTATE is set correctly for POLL or NMI */ opstate_init(); pci_rc = pci_register_driver(&i7core_driver); return (pci_rc < 0) ? pci_rc : 0; } /* * i7core_exit() Module exit function * Unregister the driver */ static void __exit i7core_exit(void) { debugf2("MC: " __FILE__ ": %s()\n", __func__); pci_unregister_driver(&i7core_driver); } module_init(i7core_init); module_exit(i7core_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Mauro Carvalho Chehab "); MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)"); MODULE_DESCRIPTION("MC Driver for Intel i7 Core memory controllers - " I7CORE_REVISION); module_param(edac_op_state, int, 0444); MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");