/* 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 #include #include "edac_core.h" /* * 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 " __DATE__ #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 /* 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 Device 3 Function 2, as inicated on Xeon 5500 datasheet */ #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 { u32 ranks; u32 dimms; }; struct pci_id_descr { int dev; int func; int dev_id; int optional; }; 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 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 channels; /* Number of active channels */ int ce_count_available; int csrow_map[NUM_CHANS][MAX_DIMMS]; /* 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]; unsigned int is_registered; /* mcelog glue */ struct edac_mce edac_mce; /* Fifo double buffers */ struct mce mce_entry[MCE_LOG_LEN]; struct mce mce_outentry[MCE_LOG_LEN]; /* Fifo in/out counters */ unsigned mce_in, mce_out; /* Count indicator to show errors not got */ unsigned mce_overrun; }; /* Static vars */ static LIST_HEAD(i7core_edac_list); static DEFINE_MUTEX(i7core_edac_lock); #define PCI_DESCR(device, function, device_id) \ .dev = (device), \ .func = (function), \ .dev_id = (device_id) struct pci_id_descr pci_dev_descr_i7core[] = { /* 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) }, }; 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( 4, 0, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH1_CTRL) }, { PCI_DESCR( 4, 1, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH1_ADDR) }, { PCI_DESCR( 4, 2, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH1_RANK) }, { PCI_DESCR( 4, 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) }, }; /* * pci_device_id table for which devices we are looking for */ static const struct pci_device_id i7core_pci_tbl[] __devinitdata = { {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. */ }; 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 << 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 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]; } 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; } /**************************************************************************** Memory check routines ****************************************************************************/ static struct pci_dev *get_pdev_slot_func(u8 socket, unsigned slot, unsigned func) { struct i7core_dev *i7core_dev = get_i7core_dev(socket); int i; if (!i7core_dev) return NULL; for (i = 0; i < i7core_dev->n_devs; i++) { if (!i7core_dev->pdev[i]) continue; if (PCI_SLOT(i7core_dev->pdev[i]->devfn) == slot && PCI_FUNC(i7core_dev->pdev[i]->devfn) == func) { return i7core_dev->pdev[i]; } } return NULL; } /** * i7core_get_active_channels() - gets the number of channels and csrows * @socket: Quick Path Interconnect socket * @channels: Number of channels that will be returned * @csrows: Number of csrows found * * Since EDAC core needs to know in advance the number of available channels * and csrows, in order to allocate memory for csrows/channels, it is needed * to run two similar steps. At the first step, implemented on this function, * it checks the number of csrows/channels present at one socket. * this is used in order to properly allocate the size of mci components. * * It should be noticed that none of the current available datasheets explain * or even mention how csrows are seen by the memory controller. So, we need * to add a fake description for csrows. * So, this driver is attributing one DIMM memory for one csrow. */ static int i7core_get_active_channels(u8 socket, unsigned *channels, unsigned *csrows) { struct pci_dev *pdev = NULL; int i, j; u32 status, control; *channels = 0; *csrows = 0; pdev = get_pdev_slot_func(socket, 3, 0); if (!pdev) { i7core_printk(KERN_ERR, "Couldn't find socket %d fn 3.0!!!\n", socket); 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(socket, i + 4, 1); if (!pdev) { i7core_printk(KERN_ERR, "Couldn't find socket %d " "fn %d.%d!!!\n", socket, 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 on socket %d: %d\n", socket, *channels); return 0; } static int get_dimm_config(struct mem_ctl_info *mci, int *csrow) { struct i7core_pvt *pvt = mci->pvt_info; struct csrow_info *csr; struct pci_dev *pdev; int i, j; 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("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)) { 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 " "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)) { 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 %d Mb offset: %x, " "bank: %d, rank: %d, row: %#x, col: %#x\n", 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; pvt->csrow_map[i][j] = *csrow; 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]); debugf1("\t[%i] DIVBY3\tREMOVED\tOFFSET\n", i); for (j = 0; j < 8; j++) debugf1("\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_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 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 -EIO; 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 -EIO; 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 -EIO; 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. */ #define DECLARE_ADDR_MATCH(param, limit) \ static ssize_t i7core_inject_store_##param( \ struct mem_ctl_info *mci, \ const char *data, size_t count) \ { \ struct i7core_pvt *pvt; \ long value; \ int rc; \ \ debugf1("%s()\n", __func__); \ pvt = mci->pvt_info; \ \ if (pvt->inject.enable) \ disable_inject(mci); \ \ if (!strcasecmp(data, "any") || !strcasecmp(data, "any\n"))\ value = -1; \ else { \ rc = strict_strtoul(data, 10, &value); \ if ((rc < 0) || (value >= limit)) \ return -EIO; \ } \ \ pvt->inject.param = value; \ \ return count; \ } \ \ static ssize_t i7core_inject_show_##param( \ struct mem_ctl_info *mci, \ char *data) \ { \ struct i7core_pvt *pvt; \ \ pvt = mci->pvt_info; \ debugf1("%s() pvt=%p\n", __func__, 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) \ { \ .attr = { \ .name = #param, \ .mode = (S_IRUGO | S_IWUSR) \ }, \ .show = i7core_inject_show_##param, \ .store = 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); static int write_and_test(struct pci_dev *dev, int where, u32 val) { u32 read; int count; debugf0("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 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 |= 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 * Without writing 8 to this register, errors aren't injected. Not sure * why. */ pci_write_config_dword(pvt->pci_noncore, MC_CFG_CONTROL, 8); 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; if (!pvt->pci_ch[pvt->inject.channel][0]) return 0; pci_read_config_dword(pvt->pci_ch[pvt->inject.channel][0], MC_CHANNEL_ERROR_INJECT, &injectmask); debugf0("Inject error read: 0x%018x\n", injectmask); if (injectmask & 0x0c) pvt->inject.enable = 1; return sprintf(data, "%d\n", pvt->inject.enable); } #define DECLARE_COUNTER(param) \ static ssize_t i7core_show_counter_##param( \ struct mem_ctl_info *mci, \ char *data) \ { \ struct i7core_pvt *pvt = mci->pvt_info; \ \ debugf1("%s() \n", __func__); \ if (!pvt->ce_count_available || (pvt->is_registered)) \ return sprintf(data, "data unavailable\n"); \ return sprintf(data, "%lu\n", \ pvt->udimm_ce_count[param]); \ } #define ATTR_COUNTER(param) \ { \ .attr = { \ .name = __stringify(udimm##param), \ .mode = (S_IRUGO | S_IWUSR) \ }, \ .show = i7core_show_counter_##param \ } DECLARE_COUNTER(0); DECLARE_COUNTER(1); DECLARE_COUNTER(2); /* * Sysfs struct */ static struct mcidev_sysfs_attribute i7core_addrmatch_attrs[] = { ATTR_ADDR_MATCH(channel), ATTR_ADDR_MATCH(dimm), ATTR_ADDR_MATCH(rank), ATTR_ADDR_MATCH(bank), ATTR_ADDR_MATCH(page), ATTR_ADDR_MATCH(col), { .attr = { .name = NULL } } }; static struct mcidev_sysfs_group i7core_inject_addrmatch = { .name = "inject_addrmatch", .mcidev_attr = i7core_addrmatch_attrs, }; static struct mcidev_sysfs_attribute i7core_udimm_counters_attrs[] = { ATTR_COUNTER(0), ATTR_COUNTER(1), ATTR_COUNTER(2), }; static struct mcidev_sysfs_group i7core_udimm_counters = { .name = "all_channel_counts", .mcidev_attr = i7core_udimm_counters_attrs, }; static struct mcidev_sysfs_attribute i7core_sysfs_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, }, { .grp = &i7core_inject_addrmatch, }, { .attr = { .name = "inject_enable", .mode = (S_IRUGO | S_IWUSR) }, .show = i7core_inject_enable_show, .store = i7core_inject_enable_store, }, { .attr = { .name = NULL } }, /* Reserved for udimm counters */ { .attr = { .name = 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(struct i7core_dev *i7core_dev) { int i; debugf0(__FILE__ ": %s()\n", __func__); for (i = 0; i < i7core_dev->n_devs; i++) { struct pci_dev *pdev = i7core_dev->pdev[i]; if (!pdev) continue; debugf0("Removing dev %02x:%02x.%d\n", pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)); pci_dev_put(pdev); } kfree(i7core_dev->pdev); list_del(&i7core_dev->list); kfree(i7core_dev); } static void i7core_put_all_devices(void) { struct i7core_dev *i7core_dev, *tmp; list_for_each_entry_safe(i7core_dev, tmp, &i7core_edac_list, list) i7core_put_devices(i7core_dev); } static void i7core_xeon_pci_fixup(int dev_id) { struct pci_dev *pdev = NULL; int i; /* * On Xeon 55xx, the Intel Quckpath Arch Generic Non-core pci buses * aren't announced by acpi. So, we need to use a legacy scan probing * to detect them */ pdev = pci_get_device(PCI_VENDOR_ID_INTEL, dev_id, NULL); if (unlikely(!pdev)) { for (i = 0; i < MAX_SOCKET_BUSES; i++) pcibios_scan_specific_bus(255-i); } } /* * 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 */ int i7core_get_onedevice(struct pci_dev **prev, int devno, struct pci_id_descr *dev_descr, unsigned n_devs) { struct i7core_dev *i7core_dev; struct pci_dev *pdev = NULL; u8 bus = 0; u8 socket = 0; pdev = pci_get_device(PCI_VENDOR_ID_INTEL, dev_descr->dev_id, *prev); /* * On Xeon 55xx, the Intel Quckpath Arch Generic Non-core regs * is at addr 8086:2c40, instead of 8086:2c41. So, we need * to probe for the alternate address in case of failure */ if (dev_descr->dev_id == PCI_DEVICE_ID_INTEL_I7_NONCORE && !pdev) pdev = pci_get_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_I7_NONCORE_ALT, *prev); if (dev_descr->dev_id == PCI_DEVICE_ID_INTEL_LYNNFIELD_NONCORE && !pdev) pdev = pci_get_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LYNNFIELD_NONCORE_ALT, *prev); if (!pdev) { if (*prev) { *prev = pdev; return 0; } if (dev_descr->optional) return 0; i7core_printk(KERN_ERR, "Device not found: dev %02x.%d PCI ID %04x:%04x\n", dev_descr->dev, dev_descr->func, PCI_VENDOR_ID_INTEL, dev_descr->dev_id); /* End of list, leave */ return -ENODEV; } bus = pdev->bus->number; if (bus == 0x3f) socket = 0; else socket = 255 - bus; i7core_dev = get_i7core_dev(socket); if (!i7core_dev) { i7core_dev = kzalloc(sizeof(*i7core_dev), GFP_KERNEL); if (!i7core_dev) return -ENOMEM; i7core_dev->pdev = kzalloc(sizeof(*i7core_dev->pdev) * n_devs, GFP_KERNEL); if (!i7core_dev->pdev) return -ENOMEM; i7core_dev->socket = socket; i7core_dev->n_devs = n_devs; list_add_tail(&i7core_dev->list, &i7core_edac_list); } if (i7core_dev->pdev[devno]) { i7core_printk(KERN_ERR, "Duplicated device for " "dev %02x:%02x.%d PCI ID %04x:%04x\n", bus, dev_descr->dev, dev_descr->func, PCI_VENDOR_ID_INTEL, dev_descr->dev_id); pci_dev_put(pdev); return -ENODEV; } i7core_dev->pdev[devno] = pdev; /* Sanity check */ if (unlikely(PCI_SLOT(pdev->devfn) != dev_descr->dev || PCI_FUNC(pdev->devfn) != dev_descr->func)) { i7core_printk(KERN_ERR, "Device PCI ID %04x:%04x " "has dev %02x:%02x.%d instead of dev %02x:%02x.%d\n", PCI_VENDOR_ID_INTEL, dev_descr->dev_id, bus, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), bus, dev_descr->dev, dev_descr->func); return -ENODEV; } /* Be sure that the device is enabled */ if (unlikely(pci_enable_device(pdev) < 0)) { i7core_printk(KERN_ERR, "Couldn't enable " "dev %02x:%02x.%d PCI ID %04x:%04x\n", bus, dev_descr->dev, dev_descr->func, PCI_VENDOR_ID_INTEL, dev_descr->dev_id); return -ENODEV; } debugf0("Detected socket %d dev %02x:%02x.%d PCI ID %04x:%04x\n", socket, bus, dev_descr->dev, dev_descr->func, PCI_VENDOR_ID_INTEL, dev_descr->dev_id); *prev = pdev; return 0; } static int i7core_get_devices(struct pci_id_descr dev_descr[], unsigned n_devs) { int i, rc; struct pci_dev *pdev = NULL; for (i = 0; i < n_devs; i++) { pdev = NULL; do { rc = i7core_get_onedevice(&pdev, i, &dev_descr[i], n_devs); if (rc < 0) { i7core_put_all_devices(); return -ENODEV; } } while (pdev); } return 0; } static int mci_bind_devs(struct mem_ctl_info *mci, struct i7core_dev *i7core_dev) { struct i7core_pvt *pvt = mci->pvt_info; struct pci_dev *pdev; int i, func, slot; /* Associates i7core_dev and mci for future usage */ pvt->i7core_dev = i7core_dev; i7core_dev->mci = mci; pvt->is_registered = 0; for (i = 0; i < i7core_dev->n_devs; i++) { pdev = i7core_dev->pdev[i]; 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, socket %d\n", PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), pdev, i7core_dev->socket); if (PCI_SLOT(pdev->devfn) == 3 && PCI_FUNC(pdev->devfn) == 2) pvt->is_registered = 1; } /* * Add extra nodes to count errors on udimm * For registered memory, this is not needed, since the counters * are already displayed at the standard locations */ if (!pvt->is_registered) i7core_sysfs_attrs[ARRAY_SIZE(i7core_sysfs_attrs)-2].grp = &i7core_udimm_counters; 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 ****************************************************************************/ static void i7core_rdimm_update_csrow(struct mem_ctl_info *mci, int chan, int dimm, int add) { char *msg; struct i7core_pvt *pvt = mci->pvt_info; int row = pvt->csrow_map[chan][dimm], i; for (i = 0; i < add; i++) { msg = kasprintf(GFP_KERNEL, "Corrected error " "(Socket=%d channel=%d dimm=%d)", pvt->i7core_dev->socket, chan, dimm); edac_mc_handle_fbd_ce(mci, row, 0, msg); kfree (msg); } } static void i7core_rdimm_update_ce_count(struct mem_ctl_info *mci, int chan, int new0, int new1, int new2) { struct i7core_pvt *pvt = mci->pvt_info; int add0 = 0, add1 = 0, add2 = 0; /* Updates CE counters if it is not the first time here */ if (pvt->ce_count_available) { /* Updates CE counters */ add2 = new2 - pvt->rdimm_last_ce_count[chan][2]; add1 = new1 - pvt->rdimm_last_ce_count[chan][1]; add0 = new0 - pvt->rdimm_last_ce_count[chan][0]; if (add2 < 0) add2 += 0x7fff; pvt->rdimm_ce_count[chan][2] += add2; if (add1 < 0) add1 += 0x7fff; pvt->rdimm_ce_count[chan][1] += add1; if (add0 < 0) add0 += 0x7fff; pvt->rdimm_ce_count[chan][0] += add0; } else pvt->ce_count_available = 1; /* Store the new values */ pvt->rdimm_last_ce_count[chan][2] = new2; pvt->rdimm_last_ce_count[chan][1] = new1; pvt->rdimm_last_ce_count[chan][0] = new0; /*updated the edac core */ if (add0 != 0) i7core_rdimm_update_csrow(mci, chan, 0, add0); if (add1 != 0) i7core_rdimm_update_csrow(mci, chan, 1, add1); if (add2 != 0) i7core_rdimm_update_csrow(mci, chan, 2, add2); } static void i7core_rdimm_check_mc_ecc_err(struct mem_ctl_info *mci) { struct i7core_pvt *pvt = mci->pvt_info; u32 rcv[3][2]; int i, new0, new1, new2; /*Read DEV 3: FUN 2: MC_COR_ECC_CNT regs directly*/ pci_read_config_dword(pvt->pci_mcr[2], MC_COR_ECC_CNT_0, &rcv[0][0]); pci_read_config_dword(pvt->pci_mcr[2], MC_COR_ECC_CNT_1, &rcv[0][1]); pci_read_config_dword(pvt->pci_mcr[2], MC_COR_ECC_CNT_2, &rcv[1][0]); pci_read_config_dword(pvt->pci_mcr[2], MC_COR_ECC_CNT_3, &rcv[1][1]); pci_read_config_dword(pvt->pci_mcr[2], MC_COR_ECC_CNT_4, &rcv[2][0]); pci_read_config_dword(pvt->pci_mcr[2], MC_COR_ECC_CNT_5, &rcv[2][1]); for (i = 0 ; i < 3; i++) { debugf3("MC_COR_ECC_CNT%d = 0x%x; MC_COR_ECC_CNT%d = 0x%x\n", (i * 2), rcv[i][0], (i * 2) + 1, rcv[i][1]); /*if the channel has 3 dimms*/ if (pvt->channel[i].dimms > 2) { new0 = DIMM_BOT_COR_ERR(rcv[i][0]); new1 = DIMM_TOP_COR_ERR(rcv[i][0]); new2 = DIMM_BOT_COR_ERR(rcv[i][1]); } else { new0 = DIMM_TOP_COR_ERR(rcv[i][0]) + DIMM_BOT_COR_ERR(rcv[i][0]); new1 = DIMM_TOP_COR_ERR(rcv[i][1]) + DIMM_BOT_COR_ERR(rcv[i][1]); new2 = 0; } i7core_rdimm_update_ce_count(mci, i, new0, new1, new2); } } /* 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 i7core_udimm_check_mc_ecc_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 test errors */ 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); /* 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->udimm_last_ce_count[2]; add1 = new1 - pvt->udimm_last_ce_count[1]; add0 = new0 - pvt->udimm_last_ce_count[0]; if (add2 < 0) add2 += 0x7fff; pvt->udimm_ce_count[2] += add2; if (add1 < 0) add1 += 0x7fff; pvt->udimm_ce_count[1] += add1; if (add0 < 0) add0 += 0x7fff; pvt->udimm_ce_count[0] += add0; if (add0 | add1 | add2) i7core_printk(KERN_ERR, "New Corrected error(s): " "dimm0: +%d, dimm1: +%d, dimm2 +%d\n", add0, add1, add2); } else pvt->ce_count_available = 1; /* Store the new values */ pvt->udimm_last_ce_count[2] = new2; pvt->udimm_last_ce_count[1] = new1; pvt->udimm_last_ce_count[0] = new0; } /* * According with tables E-11 and E-12 of chapter E.3.3 of Intel 64 and IA-32 * Architectures Software Developer’s Manual Volume 3B. * Nehalem are defined as family 0x06, model 0x1a * * The MCA registers used here are the following ones: * struct mce field MCA Register * m->status MSR_IA32_MC8_STATUS * m->addr MSR_IA32_MC8_ADDR * m->misc MSR_IA32_MC8_MISC * In the case of Nehalem, the error information is masked at .status and .misc * fields */ static void i7core_mce_output_error(struct mem_ctl_info *mci, struct mce *m) { struct i7core_pvt *pvt = mci->pvt_info; char *type, *optype, *err, *msg; unsigned long error = m->status & 0x1ff0000l; u32 optypenum = (m->status >> 4) & 0x07; u32 core_err_cnt = (m->status >> 38) && 0x7fff; u32 dimm = (m->misc >> 16) & 0x3; u32 channel = (m->misc >> 18) & 0x3; u32 syndrome = m->misc >> 32; u32 errnum = find_first_bit(&error, 32); int csrow; if (m->mcgstatus & 1) type = "FATAL"; else type = "NON_FATAL"; switch (optypenum) { case 0: optype = "generic undef request"; break; case 1: optype = "read error"; break; case 2: optype = "write error"; break; case 3: optype = "addr/cmd error"; break; case 4: optype = "scrubbing error"; break; default: optype = "reserved"; break; } switch (errnum) { case 16: err = "read ECC error"; break; case 17: err = "RAS ECC error"; break; case 18: err = "write parity error"; break; case 19: err = "redundacy loss"; break; case 20: err = "reserved"; break; case 21: err = "memory range error"; break; case 22: err = "RTID out of range"; break; case 23: err = "address parity error"; break; case 24: err = "byte enable parity error"; break; default: err = "unknown"; } /* FIXME: should convert addr into bank and rank information */ msg = kasprintf(GFP_ATOMIC, "%s (addr = 0x%08llx, cpu=%d, Dimm=%d, Channel=%d, " "syndrome=0x%08x, count=%d, Err=%08llx:%08llx (%s: %s))\n", type, (long long) m->addr, m->cpu, dimm, channel, syndrome, core_err_cnt, (long long)m->status, (long long)m->misc, optype, err); debugf0("%s", msg); csrow = pvt->csrow_map[channel][dimm]; /* Call the helper to output message */ if (m->mcgstatus & 1) edac_mc_handle_fbd_ue(mci, csrow, 0, 0 /* FIXME: should be channel here */, msg); else if (!pvt->is_registered) edac_mc_handle_fbd_ce(mci, csrow, 0 /* FIXME: should be channel here */, msg); kfree(msg); } /* * 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; /* * MCE first step: Copy all mce errors into a temporary buffer * We use a double buffering here, to reduce the risk of * loosing an error. */ smp_rmb(); count = (pvt->mce_out + MCE_LOG_LEN - pvt->mce_in) % MCE_LOG_LEN; if (!count) return; m = pvt->mce_outentry; if (pvt->mce_in + count > MCE_LOG_LEN) { unsigned l = MCE_LOG_LEN - pvt->mce_in; memcpy(m, &pvt->mce_entry[pvt->mce_in], sizeof(*m) * l); smp_wmb(); pvt->mce_in = 0; count -= l; m += l; } memcpy(m, &pvt->mce_entry[pvt->mce_in], sizeof(*m) * count); smp_wmb(); pvt->mce_in += count; smp_rmb(); if (pvt->mce_overrun) { i7core_printk(KERN_ERR, "Lost %d memory errors\n", pvt->mce_overrun); smp_wmb(); pvt->mce_overrun = 0; } /* * MCE second step: parse errors and display */ for (i = 0; i < count; i++) i7core_mce_output_error(mci, &pvt->mce_outentry[i]); /* * Now, let's increment CE error counts */ if (!pvt->is_registered) i7core_udimm_check_mc_ecc_err(mci); else i7core_rdimm_check_mc_ecc_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. * WARNING: As this routine should be called at NMI time, extra care should * be taken to avoid deadlocks, and to be as fast as possible. */ static int i7core_mce_check_error(void *priv, struct mce *mce) { struct mem_ctl_info *mci = priv; struct i7core_pvt *pvt = mci->pvt_info; /* * Just let mcelog handle it if the error is * outside the memory controller */ if (((mce->status & 0xffff) >> 7) != 1) return 0; /* Bank 8 registers are the only ones that we know how to handle */ if (mce->bank != 8) return 0; #ifdef CONFIG_SMP /* Only handle if it is the right mc controller */ if (cpu_data(mce->cpu).phys_proc_id != pvt->i7core_dev->socket) return 0; #endif smp_rmb(); if ((pvt->mce_out + 1) % MCE_LOG_LEN == pvt->mce_in) { smp_wmb(); pvt->mce_overrun++; return 0; } /* Copy memory error at the ringbuffer */ memcpy(&pvt->mce_entry[pvt->mce_out], mce, sizeof(*mce)); smp_wmb(); pvt->mce_out = (pvt->mce_out + 1) % MCE_LOG_LEN; /* Handle fatal errors immediately */ if (mce->mcgstatus & 1) i7core_check_error(mci); /* Advice mcelog that the error were handled */ return 1; } static int i7core_register_mci(struct i7core_dev *i7core_dev, int num_channels, int num_csrows) { struct mem_ctl_info *mci; struct i7core_pvt *pvt; int csrow = 0; int rc; /* allocate a new MC control structure */ mci = edac_mc_alloc(sizeof(*pvt), num_csrows, num_channels, i7core_dev->socket); if (unlikely(!mci)) return -ENOMEM; debugf0("MC: " __FILE__ ": %s(): mci = %p\n", __func__, mci); /* record ptr to the generic device */ mci->dev = &i7core_dev->pdev[0]->dev; pvt = mci->pvt_info; memset(pvt, 0, sizeof(*pvt)); /* * 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 = kasprintf(GFP_KERNEL, "i7 core #%d", i7core_dev->socket); mci->dev_name = pci_name(i7core_dev->pdev[0]); mci->ctl_page_to_phys = NULL; mci->mc_driver_sysfs_attributes = i7core_sysfs_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, i7core_dev); if (unlikely(rc < 0)) goto fail; /* Get dimm basic config */ get_dimm_config(mci, &csrow); /* 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 fail; } /* allocating generic PCI control info */ i7core_pci = edac_pci_create_generic_ctl(&i7core_dev->pdev[0]->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 = mci; pvt->edac_mce.check_error = i7core_mce_check_error; rc = edac_mce_register(&pvt->edac_mce); if (unlikely(rc < 0)) { debugf0("MC: " __FILE__ ": %s(): failed edac_mce_register()\n", __func__); } fail: edac_mc_free(mci); return rc; } /* * 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) { int dev_idx = id->driver_data; int rc; struct i7core_dev *i7core_dev; /* * All memory controllers are allocated at the first pass. */ if (unlikely(dev_idx >= 1)) return -EINVAL; /* get the pci devices we want to reserve for our use */ mutex_lock(&i7core_edac_lock); if (pdev->device == PCI_DEVICE_ID_INTEL_LYNNFIELD_QPI_LINK0) { printk(KERN_INFO "i7core_edac: detected a " "Lynnfield processor\n"); rc = i7core_get_devices(pci_dev_descr_lynnfield, ARRAY_SIZE(pci_dev_descr_lynnfield)); } else { printk(KERN_INFO "i7core_edac: detected a " "Nehalem/Nehalem-EP processor\n"); rc = i7core_get_devices(pci_dev_descr_i7core, ARRAY_SIZE(pci_dev_descr_i7core)); } if (unlikely(rc < 0)) goto fail0; list_for_each_entry(i7core_dev, &i7core_edac_list, list) { int channels; int csrows; /* Check the number of active and not disabled channels */ rc = i7core_get_active_channels(i7core_dev->socket, &channels, &csrows); if (unlikely(rc < 0)) goto fail1; rc = i7core_register_mci(i7core_dev, channels, csrows); if (unlikely(rc < 0)) goto fail1; } i7core_printk(KERN_INFO, "Driver loaded.\n"); mutex_unlock(&i7core_edac_lock); return 0; fail1: i7core_put_all_devices(); fail0: mutex_unlock(&i7core_edac_lock); 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_dev *i7core_dev, *tmp; debugf0(__FILE__ ": %s()\n", __func__); if (i7core_pci) edac_pci_release_generic_ctl(i7core_pci); /* * we have a trouble here: pdev value for removal will be wrong, since * it will point to the X58 register used to detect that the machine * is a Nehalem or upper design. However, due to the way several PCI * devices are grouped together to provide MC functionality, we need * to use a different method for releasing the devices */ mutex_lock(&i7core_edac_lock); list_for_each_entry_safe(i7core_dev, tmp, &i7core_edac_list, list) { mci = edac_mc_del_mc(&i7core_dev->pdev[0]->dev); if (mci) { struct i7core_pvt *pvt = mci->pvt_info; i7core_dev = pvt->i7core_dev; edac_mce_unregister(&pvt->edac_mce); kfree(mci->ctl_name); edac_mc_free(mci); i7core_put_devices(i7core_dev); } else { i7core_printk(KERN_ERR, "Couldn't find mci for socket %d\n", i7core_dev->socket); } } mutex_unlock(&i7core_edac_lock); } 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(); i7core_xeon_pci_fixup(pci_dev_descr_i7core[0].dev_id); pci_rc = pci_register_driver(&i7core_driver); if (pci_rc >= 0) return 0; i7core_printk(KERN_ERR, "Failed to register device with error %d.\n", pci_rc); return pci_rc; } /* * 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");