diff options
Diffstat (limited to 'drivers/edac/e7xxx_edac.c')
-rw-r--r-- | drivers/edac/e7xxx_edac.c | 576 |
1 files changed, 576 insertions, 0 deletions
diff --git a/drivers/edac/e7xxx_edac.c b/drivers/edac/e7xxx_edac.c new file mode 100644 index 00000000..6ffb6d23 --- /dev/null +++ b/drivers/edac/e7xxx_edac.c @@ -0,0 +1,576 @@ +/* + * Intel e7xxx Memory Controller kernel module + * (C) 2003 Linux Networx (http://lnxi.com) + * This file may be distributed under the terms of the + * GNU General Public License. + * + * See "enum e7xxx_chips" below for supported chipsets + * + * Written by Thayne Harbaugh + * Based on work by Dan Hollis <goemon at anime dot net> and others. + * http://www.anime.net/~goemon/linux-ecc/ + * + * Contributors: + * Eric Biederman (Linux Networx) + * Tom Zimmerman (Linux Networx) + * Jim Garlick (Lawrence Livermore National Labs) + * Dave Peterson (Lawrence Livermore National Labs) + * That One Guy (Some other place) + * Wang Zhenyu (intel.com) + * + * $Id: edac_e7xxx.c,v 1.5.2.9 2005/10/05 00:43:44 dsp_llnl Exp $ + * + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/pci_ids.h> +#include <linux/edac.h> +#include "edac_core.h" + +#define E7XXX_REVISION " Ver: 2.0.2" +#define EDAC_MOD_STR "e7xxx_edac" + +#define e7xxx_printk(level, fmt, arg...) \ + edac_printk(level, "e7xxx", fmt, ##arg) + +#define e7xxx_mc_printk(mci, level, fmt, arg...) \ + edac_mc_chipset_printk(mci, level, "e7xxx", fmt, ##arg) + +#ifndef PCI_DEVICE_ID_INTEL_7205_0 +#define PCI_DEVICE_ID_INTEL_7205_0 0x255d +#endif /* PCI_DEVICE_ID_INTEL_7205_0 */ + +#ifndef PCI_DEVICE_ID_INTEL_7205_1_ERR +#define PCI_DEVICE_ID_INTEL_7205_1_ERR 0x2551 +#endif /* PCI_DEVICE_ID_INTEL_7205_1_ERR */ + +#ifndef PCI_DEVICE_ID_INTEL_7500_0 +#define PCI_DEVICE_ID_INTEL_7500_0 0x2540 +#endif /* PCI_DEVICE_ID_INTEL_7500_0 */ + +#ifndef PCI_DEVICE_ID_INTEL_7500_1_ERR +#define PCI_DEVICE_ID_INTEL_7500_1_ERR 0x2541 +#endif /* PCI_DEVICE_ID_INTEL_7500_1_ERR */ + +#ifndef PCI_DEVICE_ID_INTEL_7501_0 +#define PCI_DEVICE_ID_INTEL_7501_0 0x254c +#endif /* PCI_DEVICE_ID_INTEL_7501_0 */ + +#ifndef PCI_DEVICE_ID_INTEL_7501_1_ERR +#define PCI_DEVICE_ID_INTEL_7501_1_ERR 0x2541 +#endif /* PCI_DEVICE_ID_INTEL_7501_1_ERR */ + +#ifndef PCI_DEVICE_ID_INTEL_7505_0 +#define PCI_DEVICE_ID_INTEL_7505_0 0x2550 +#endif /* PCI_DEVICE_ID_INTEL_7505_0 */ + +#ifndef PCI_DEVICE_ID_INTEL_7505_1_ERR +#define PCI_DEVICE_ID_INTEL_7505_1_ERR 0x2551 +#endif /* PCI_DEVICE_ID_INTEL_7505_1_ERR */ + +#define E7XXX_NR_CSROWS 8 /* number of csrows */ +#define E7XXX_NR_DIMMS 8 /* FIXME - is this correct? */ + +/* E7XXX register addresses - device 0 function 0 */ +#define E7XXX_DRB 0x60 /* DRAM row boundary register (8b) */ +#define E7XXX_DRA 0x70 /* DRAM row attribute register (8b) */ + /* + * 31 Device width row 7 0=x8 1=x4 + * 27 Device width row 6 + * 23 Device width row 5 + * 19 Device width row 4 + * 15 Device width row 3 + * 11 Device width row 2 + * 7 Device width row 1 + * 3 Device width row 0 + */ +#define E7XXX_DRC 0x7C /* DRAM controller mode reg (32b) */ + /* + * 22 Number channels 0=1,1=2 + * 19:18 DRB Granularity 32/64MB + */ +#define E7XXX_TOLM 0xC4 /* DRAM top of low memory reg (16b) */ +#define E7XXX_REMAPBASE 0xC6 /* DRAM remap base address reg (16b) */ +#define E7XXX_REMAPLIMIT 0xC8 /* DRAM remap limit address reg (16b) */ + +/* E7XXX register addresses - device 0 function 1 */ +#define E7XXX_DRAM_FERR 0x80 /* DRAM first error register (8b) */ +#define E7XXX_DRAM_NERR 0x82 /* DRAM next error register (8b) */ +#define E7XXX_DRAM_CELOG_ADD 0xA0 /* DRAM first correctable memory */ + /* error address register (32b) */ + /* + * 31:28 Reserved + * 27:6 CE address (4k block 33:12) + * 5:0 Reserved + */ +#define E7XXX_DRAM_UELOG_ADD 0xB0 /* DRAM first uncorrectable memory */ + /* error address register (32b) */ + /* + * 31:28 Reserved + * 27:6 CE address (4k block 33:12) + * 5:0 Reserved + */ +#define E7XXX_DRAM_CELOG_SYNDROME 0xD0 /* DRAM first correctable memory */ + /* error syndrome register (16b) */ + +enum e7xxx_chips { + E7500 = 0, + E7501, + E7505, + E7205, +}; + +struct e7xxx_pvt { + struct pci_dev *bridge_ck; + u32 tolm; + u32 remapbase; + u32 remaplimit; + const struct e7xxx_dev_info *dev_info; +}; + +struct e7xxx_dev_info { + u16 err_dev; + const char *ctl_name; +}; + +struct e7xxx_error_info { + u8 dram_ferr; + u8 dram_nerr; + u32 dram_celog_add; + u16 dram_celog_syndrome; + u32 dram_uelog_add; +}; + +static struct edac_pci_ctl_info *e7xxx_pci; + +static const struct e7xxx_dev_info e7xxx_devs[] = { + [E7500] = { + .err_dev = PCI_DEVICE_ID_INTEL_7500_1_ERR, + .ctl_name = "E7500"}, + [E7501] = { + .err_dev = PCI_DEVICE_ID_INTEL_7501_1_ERR, + .ctl_name = "E7501"}, + [E7505] = { + .err_dev = PCI_DEVICE_ID_INTEL_7505_1_ERR, + .ctl_name = "E7505"}, + [E7205] = { + .err_dev = PCI_DEVICE_ID_INTEL_7205_1_ERR, + .ctl_name = "E7205"}, +}; + +/* FIXME - is this valid for both SECDED and S4ECD4ED? */ +static inline int e7xxx_find_channel(u16 syndrome) +{ + debugf3("%s()\n", __func__); + + if ((syndrome & 0xff00) == 0) + return 0; + + if ((syndrome & 0x00ff) == 0) + return 1; + + if ((syndrome & 0xf000) == 0 || (syndrome & 0x0f00) == 0) + return 0; + + return 1; +} + +static unsigned long ctl_page_to_phys(struct mem_ctl_info *mci, + unsigned long page) +{ + u32 remap; + struct e7xxx_pvt *pvt = (struct e7xxx_pvt *)mci->pvt_info; + + debugf3("%s()\n", __func__); + + if ((page < pvt->tolm) || + ((page >= 0x100000) && (page < pvt->remapbase))) + return page; + + remap = (page - pvt->tolm) + pvt->remapbase; + + if (remap < pvt->remaplimit) + return remap; + + e7xxx_printk(KERN_ERR, "Invalid page %lx - out of range\n", page); + return pvt->tolm - 1; +} + +static void process_ce(struct mem_ctl_info *mci, struct e7xxx_error_info *info) +{ + u32 error_1b, page; + u16 syndrome; + int row; + int channel; + + debugf3("%s()\n", __func__); + /* read the error address */ + error_1b = info->dram_celog_add; + /* FIXME - should use PAGE_SHIFT */ + page = error_1b >> 6; /* convert the address to 4k page */ + /* read the syndrome */ + syndrome = info->dram_celog_syndrome; + /* FIXME - check for -1 */ + row = edac_mc_find_csrow_by_page(mci, page); + /* convert syndrome to channel */ + channel = e7xxx_find_channel(syndrome); + edac_mc_handle_ce(mci, page, 0, syndrome, row, channel, "e7xxx CE"); +} + +static void process_ce_no_info(struct mem_ctl_info *mci) +{ + debugf3("%s()\n", __func__); + edac_mc_handle_ce_no_info(mci, "e7xxx CE log register overflow"); +} + +static void process_ue(struct mem_ctl_info *mci, struct e7xxx_error_info *info) +{ + u32 error_2b, block_page; + int row; + + debugf3("%s()\n", __func__); + /* read the error address */ + error_2b = info->dram_uelog_add; + /* FIXME - should use PAGE_SHIFT */ + block_page = error_2b >> 6; /* convert to 4k address */ + row = edac_mc_find_csrow_by_page(mci, block_page); + edac_mc_handle_ue(mci, block_page, 0, row, "e7xxx UE"); +} + +static void process_ue_no_info(struct mem_ctl_info *mci) +{ + debugf3("%s()\n", __func__); + edac_mc_handle_ue_no_info(mci, "e7xxx UE log register overflow"); +} + +static void e7xxx_get_error_info(struct mem_ctl_info *mci, + struct e7xxx_error_info *info) +{ + struct e7xxx_pvt *pvt; + + pvt = (struct e7xxx_pvt *)mci->pvt_info; + pci_read_config_byte(pvt->bridge_ck, E7XXX_DRAM_FERR, &info->dram_ferr); + pci_read_config_byte(pvt->bridge_ck, E7XXX_DRAM_NERR, &info->dram_nerr); + + if ((info->dram_ferr & 1) || (info->dram_nerr & 1)) { + pci_read_config_dword(pvt->bridge_ck, E7XXX_DRAM_CELOG_ADD, + &info->dram_celog_add); + pci_read_config_word(pvt->bridge_ck, + E7XXX_DRAM_CELOG_SYNDROME, + &info->dram_celog_syndrome); + } + + if ((info->dram_ferr & 2) || (info->dram_nerr & 2)) + pci_read_config_dword(pvt->bridge_ck, E7XXX_DRAM_UELOG_ADD, + &info->dram_uelog_add); + + if (info->dram_ferr & 3) + pci_write_bits8(pvt->bridge_ck, E7XXX_DRAM_FERR, 0x03, 0x03); + + if (info->dram_nerr & 3) + pci_write_bits8(pvt->bridge_ck, E7XXX_DRAM_NERR, 0x03, 0x03); +} + +static int e7xxx_process_error_info(struct mem_ctl_info *mci, + struct e7xxx_error_info *info, + int handle_errors) +{ + int error_found; + + error_found = 0; + + /* decode and report errors */ + if (info->dram_ferr & 1) { /* check first error correctable */ + error_found = 1; + + if (handle_errors) + process_ce(mci, info); + } + + if (info->dram_ferr & 2) { /* check first error uncorrectable */ + error_found = 1; + + if (handle_errors) + process_ue(mci, info); + } + + if (info->dram_nerr & 1) { /* check next error correctable */ + error_found = 1; + + if (handle_errors) { + if (info->dram_ferr & 1) + process_ce_no_info(mci); + else + process_ce(mci, info); + } + } + + if (info->dram_nerr & 2) { /* check next error uncorrectable */ + error_found = 1; + + if (handle_errors) { + if (info->dram_ferr & 2) + process_ue_no_info(mci); + else + process_ue(mci, info); + } + } + + return error_found; +} + +static void e7xxx_check(struct mem_ctl_info *mci) +{ + struct e7xxx_error_info info; + + debugf3("%s()\n", __func__); + e7xxx_get_error_info(mci, &info); + e7xxx_process_error_info(mci, &info, 1); +} + +/* Return 1 if dual channel mode is active. Else return 0. */ +static inline int dual_channel_active(u32 drc, int dev_idx) +{ + return (dev_idx == E7501) ? ((drc >> 22) & 0x1) : 1; +} + +/* Return DRB granularity (0=32mb, 1=64mb). */ +static inline int drb_granularity(u32 drc, int dev_idx) +{ + /* only e7501 can be single channel */ + return (dev_idx == E7501) ? ((drc >> 18) & 0x3) : 1; +} + +static void e7xxx_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev, + int dev_idx, u32 drc) +{ + unsigned long last_cumul_size; + int index; + u8 value; + u32 dra, cumul_size; + int drc_chan, drc_drbg, drc_ddim, mem_dev; + struct csrow_info *csrow; + + pci_read_config_dword(pdev, E7XXX_DRA, &dra); + drc_chan = dual_channel_active(drc, dev_idx); + drc_drbg = drb_granularity(drc, dev_idx); + drc_ddim = (drc >> 20) & 0x3; + last_cumul_size = 0; + + /* The dram row boundary (DRB) reg values are boundary address + * for each DRAM row with a granularity of 32 or 64MB (single/dual + * channel operation). DRB regs are cumulative; therefore DRB7 will + * contain the total memory contained in all eight rows. + */ + for (index = 0; index < mci->nr_csrows; index++) { + /* mem_dev 0=x8, 1=x4 */ + mem_dev = (dra >> (index * 4 + 3)) & 0x1; + csrow = &mci->csrows[index]; + + pci_read_config_byte(pdev, E7XXX_DRB + index, &value); + /* convert a 64 or 32 MiB DRB to a page size. */ + cumul_size = value << (25 + drc_drbg - PAGE_SHIFT); + debugf3("%s(): (%d) cumul_size 0x%x\n", __func__, index, + cumul_size); + if (cumul_size == last_cumul_size) + continue; /* not populated */ + + csrow->first_page = last_cumul_size; + csrow->last_page = cumul_size - 1; + csrow->nr_pages = cumul_size - last_cumul_size; + last_cumul_size = cumul_size; + csrow->grain = 1 << 12; /* 4KiB - resolution of CELOG */ + csrow->mtype = MEM_RDDR; /* only one type supported */ + csrow->dtype = mem_dev ? DEV_X4 : DEV_X8; + + /* + * if single channel or x8 devices then SECDED + * if dual channel and x4 then S4ECD4ED + */ + if (drc_ddim) { + if (drc_chan && mem_dev) { + csrow->edac_mode = EDAC_S4ECD4ED; + mci->edac_cap |= EDAC_FLAG_S4ECD4ED; + } else { + csrow->edac_mode = EDAC_SECDED; + mci->edac_cap |= EDAC_FLAG_SECDED; + } + } else + csrow->edac_mode = EDAC_NONE; + } +} + +static int e7xxx_probe1(struct pci_dev *pdev, int dev_idx) +{ + u16 pci_data; + struct mem_ctl_info *mci = NULL; + struct e7xxx_pvt *pvt = NULL; + u32 drc; + int drc_chan; + struct e7xxx_error_info discard; + + debugf0("%s(): mci\n", __func__); + + pci_read_config_dword(pdev, E7XXX_DRC, &drc); + + drc_chan = dual_channel_active(drc, dev_idx); + mci = edac_mc_alloc(sizeof(*pvt), E7XXX_NR_CSROWS, drc_chan + 1, 0); + + if (mci == NULL) + return -ENOMEM; + + debugf3("%s(): init mci\n", __func__); + mci->mtype_cap = MEM_FLAG_RDDR; + mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED | + EDAC_FLAG_S4ECD4ED; + /* FIXME - what if different memory types are in different csrows? */ + mci->mod_name = EDAC_MOD_STR; + mci->mod_ver = E7XXX_REVISION; + mci->dev = &pdev->dev; + debugf3("%s(): init pvt\n", __func__); + pvt = (struct e7xxx_pvt *)mci->pvt_info; + pvt->dev_info = &e7xxx_devs[dev_idx]; + pvt->bridge_ck = pci_get_device(PCI_VENDOR_ID_INTEL, + pvt->dev_info->err_dev, pvt->bridge_ck); + + if (!pvt->bridge_ck) { + e7xxx_printk(KERN_ERR, "error reporting device not found:" + "vendor %x device 0x%x (broken BIOS?)\n", + PCI_VENDOR_ID_INTEL, e7xxx_devs[dev_idx].err_dev); + goto fail0; + } + + debugf3("%s(): more mci init\n", __func__); + mci->ctl_name = pvt->dev_info->ctl_name; + mci->dev_name = pci_name(pdev); + mci->edac_check = e7xxx_check; + mci->ctl_page_to_phys = ctl_page_to_phys; + e7xxx_init_csrows(mci, pdev, dev_idx, drc); + mci->edac_cap |= EDAC_FLAG_NONE; + debugf3("%s(): tolm, remapbase, remaplimit\n", __func__); + /* load the top of low memory, remap base, and remap limit vars */ + pci_read_config_word(pdev, E7XXX_TOLM, &pci_data); + pvt->tolm = ((u32) pci_data) << 4; + pci_read_config_word(pdev, E7XXX_REMAPBASE, &pci_data); + pvt->remapbase = ((u32) pci_data) << 14; + pci_read_config_word(pdev, E7XXX_REMAPLIMIT, &pci_data); + pvt->remaplimit = ((u32) pci_data) << 14; + e7xxx_printk(KERN_INFO, + "tolm = %x, remapbase = %x, remaplimit = %x\n", pvt->tolm, + pvt->remapbase, pvt->remaplimit); + + /* clear any pending errors, or initial state bits */ + e7xxx_get_error_info(mci, &discard); + + /* Here we assume that we will never see multiple instances of this + * type of memory controller. The ID is therefore hardcoded to 0. + */ + if (edac_mc_add_mc(mci)) { + debugf3("%s(): failed edac_mc_add_mc()\n", __func__); + goto fail1; + } + + /* allocating generic PCI control info */ + e7xxx_pci = edac_pci_create_generic_ctl(&pdev->dev, EDAC_MOD_STR); + if (!e7xxx_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__); + } + + /* get this far and it's successful */ + debugf3("%s(): success\n", __func__); + return 0; + +fail1: + pci_dev_put(pvt->bridge_ck); + +fail0: + edac_mc_free(mci); + + return -ENODEV; +} + +/* returns count (>= 0), or negative on error */ +static int __devinit e7xxx_init_one(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + debugf0("%s()\n", __func__); + + /* wake up and enable device */ + return pci_enable_device(pdev) ? + -EIO : e7xxx_probe1(pdev, ent->driver_data); +} + +static void __devexit e7xxx_remove_one(struct pci_dev *pdev) +{ + struct mem_ctl_info *mci; + struct e7xxx_pvt *pvt; + + debugf0("%s()\n", __func__); + + if (e7xxx_pci) + edac_pci_release_generic_ctl(e7xxx_pci); + + if ((mci = edac_mc_del_mc(&pdev->dev)) == NULL) + return; + + pvt = (struct e7xxx_pvt *)mci->pvt_info; + pci_dev_put(pvt->bridge_ck); + edac_mc_free(mci); +} + +static const struct pci_device_id e7xxx_pci_tbl[] __devinitdata = { + { + PCI_VEND_DEV(INTEL, 7205_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0, + E7205}, + { + PCI_VEND_DEV(INTEL, 7500_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0, + E7500}, + { + PCI_VEND_DEV(INTEL, 7501_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0, + E7501}, + { + PCI_VEND_DEV(INTEL, 7505_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0, + E7505}, + { + 0, + } /* 0 terminated list. */ +}; + +MODULE_DEVICE_TABLE(pci, e7xxx_pci_tbl); + +static struct pci_driver e7xxx_driver = { + .name = EDAC_MOD_STR, + .probe = e7xxx_init_one, + .remove = __devexit_p(e7xxx_remove_one), + .id_table = e7xxx_pci_tbl, +}; + +static int __init e7xxx_init(void) +{ + /* Ensure that the OPSTATE is set correctly for POLL or NMI */ + opstate_init(); + + return pci_register_driver(&e7xxx_driver); +} + +static void __exit e7xxx_exit(void) +{ + pci_unregister_driver(&e7xxx_driver); +} + +module_init(e7xxx_init); +module_exit(e7xxx_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Linux Networx (http://lnxi.com) Thayne Harbaugh et al\n" + "Based on.work by Dan Hollis et al"); +MODULE_DESCRIPTION("MC support for Intel e7xxx memory controllers"); +module_param(edac_op_state, int, 0444); +MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI"); |