/* * Intel e752x Memory Controller kernel module * (C) 2004 Linux Networx (http://lnxi.com) * This file may be distributed under the terms of the * GNU General Public License. * * See "enum e752x_chips" below for supported chipsets * * Written by Tom Zimmerman * * Contributors: * Thayne Harbaugh at realmsys.com (?) * Wang Zhenyu at intel.com * Dave Jiang at mvista.com * * $Id: edac_e752x.c,v 1.5.2.11 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/slab.h> #include "edac_mc.h" #define E752X_REVISION " Ver: 2.0.1 " __DATE__ #define EDAC_MOD_STR "e752x_edac" static int force_function_unhide; #define e752x_printk(level, fmt, arg...) \ edac_printk(level, "e752x", fmt, ##arg) #define e752x_mc_printk(mci, level, fmt, arg...) \ edac_mc_chipset_printk(mci, level, "e752x", fmt, ##arg) #ifndef PCI_DEVICE_ID_INTEL_7520_0 #define PCI_DEVICE_ID_INTEL_7520_0 0x3590 #endif /* PCI_DEVICE_ID_INTEL_7520_0 */ #ifndef PCI_DEVICE_ID_INTEL_7520_1_ERR #define PCI_DEVICE_ID_INTEL_7520_1_ERR 0x3591 #endif /* PCI_DEVICE_ID_INTEL_7520_1_ERR */ #ifndef PCI_DEVICE_ID_INTEL_7525_0 #define PCI_DEVICE_ID_INTEL_7525_0 0x359E #endif /* PCI_DEVICE_ID_INTEL_7525_0 */ #ifndef PCI_DEVICE_ID_INTEL_7525_1_ERR #define PCI_DEVICE_ID_INTEL_7525_1_ERR 0x3593 #endif /* PCI_DEVICE_ID_INTEL_7525_1_ERR */ #ifndef PCI_DEVICE_ID_INTEL_7320_0 #define PCI_DEVICE_ID_INTEL_7320_0 0x3592 #endif /* PCI_DEVICE_ID_INTEL_7320_0 */ #ifndef PCI_DEVICE_ID_INTEL_7320_1_ERR #define PCI_DEVICE_ID_INTEL_7320_1_ERR 0x3593 #endif /* PCI_DEVICE_ID_INTEL_7320_1_ERR */ #define E752X_NR_CSROWS 8 /* number of csrows */ /* E752X register addresses - device 0 function 0 */ #define E752X_DRB 0x60 /* DRAM row boundary register (8b) */ #define E752X_DRA 0x70 /* DRAM row attribute register (8b) */ /* * 31:30 Device width row 7 * 01=x8 10=x4 11=x8 DDR2 * 27:26 Device width row 6 * 23:22 Device width row 5 * 19:20 Device width row 4 * 15:14 Device width row 3 * 11:10 Device width row 2 * 7:6 Device width row 1 * 3:2 Device width row 0 */ #define E752X_DRC 0x7C /* DRAM controller mode reg (32b) */ /* FIXME:IS THIS RIGHT? */ /* * 22 Number channels 0=1,1=2 * 19:18 DRB Granularity 32/64MB */ #define E752X_DRM 0x80 /* Dimm mapping register */ #define E752X_DDRCSR 0x9A /* DDR control and status reg (16b) */ /* * 14:12 1 single A, 2 single B, 3 dual */ #define E752X_TOLM 0xC4 /* DRAM top of low memory reg (16b) */ #define E752X_REMAPBASE 0xC6 /* DRAM remap base address reg (16b) */ #define E752X_REMAPLIMIT 0xC8 /* DRAM remap limit address reg (16b) */ #define E752X_REMAPOFFSET 0xCA /* DRAM remap limit offset reg (16b) */ /* E752X register addresses - device 0 function 1 */ #define E752X_FERR_GLOBAL 0x40 /* Global first error register (32b) */ #define E752X_NERR_GLOBAL 0x44 /* Global next error register (32b) */ #define E752X_HI_FERR 0x50 /* Hub interface first error reg (8b) */ #define E752X_HI_NERR 0x52 /* Hub interface next error reg (8b) */ #define E752X_HI_ERRMASK 0x54 /* Hub interface error mask reg (8b) */ #define E752X_HI_SMICMD 0x5A /* Hub interface SMI command reg (8b) */ #define E752X_SYSBUS_FERR 0x60 /* System buss first error reg (16b) */ #define E752X_SYSBUS_NERR 0x62 /* System buss next error reg (16b) */ #define E752X_SYSBUS_ERRMASK 0x64 /* System buss error mask reg (16b) */ #define E752X_SYSBUS_SMICMD 0x6A /* System buss SMI command reg (16b) */ #define E752X_BUF_FERR 0x70 /* Memory buffer first error reg (8b) */ #define E752X_BUF_NERR 0x72 /* Memory buffer next error reg (8b) */ #define E752X_BUF_ERRMASK 0x74 /* Memory buffer error mask reg (8b) */ #define E752X_BUF_SMICMD 0x7A /* Memory buffer SMI command reg (8b) */ #define E752X_DRAM_FERR 0x80 /* DRAM first error register (16b) */ #define E752X_DRAM_NERR 0x82 /* DRAM next error register (16b) */ #define E752X_DRAM_ERRMASK 0x84 /* DRAM error mask register (8b) */ #define E752X_DRAM_SMICMD 0x8A /* DRAM SMI command register (8b) */ #define E752X_DRAM_RETR_ADD 0xAC /* DRAM Retry address register (32b) */ #define E752X_DRAM_SEC1_ADD 0xA0 /* DRAM first correctable memory */ /* error address register (32b) */ /* * 31 Reserved * 30:2 CE address (64 byte block 34:6) * 1 Reserved * 0 HiLoCS */ #define E752X_DRAM_SEC2_ADD 0xC8 /* DRAM first correctable memory */ /* error address register (32b) */ /* * 31 Reserved * 30:2 CE address (64 byte block 34:6) * 1 Reserved * 0 HiLoCS */ #define E752X_DRAM_DED_ADD 0xA4 /* DRAM first uncorrectable memory */ /* error address register (32b) */ /* * 31 Reserved * 30:2 CE address (64 byte block 34:6) * 1 Reserved * 0 HiLoCS */ #define E752X_DRAM_SCRB_ADD 0xA8 /* DRAM first uncorrectable scrub memory */ /* error address register (32b) */ /* * 31 Reserved * 30:2 CE address (64 byte block 34:6) * 1 Reserved * 0 HiLoCS */ #define E752X_DRAM_SEC1_SYNDROME 0xC4 /* DRAM first correctable memory */ /* error syndrome register (16b) */ #define E752X_DRAM_SEC2_SYNDROME 0xC6 /* DRAM second correctable memory */ /* error syndrome register (16b) */ #define E752X_DEVPRES1 0xF4 /* Device Present 1 register (8b) */ /* ICH5R register addresses - device 30 function 0 */ #define ICH5R_PCI_STAT 0x06 /* PCI status register (16b) */ #define ICH5R_PCI_2ND_STAT 0x1E /* PCI status secondary reg (16b) */ #define ICH5R_PCI_BRIDGE_CTL 0x3E /* PCI bridge control register (16b) */ enum e752x_chips { E7520 = 0, E7525 = 1, E7320 = 2 }; struct e752x_pvt { struct pci_dev *bridge_ck; struct pci_dev *dev_d0f0; struct pci_dev *dev_d0f1; u32 tolm; u32 remapbase; u32 remaplimit; int mc_symmetric; u8 map[8]; int map_type; const struct e752x_dev_info *dev_info; }; struct e752x_dev_info { u16 err_dev; u16 ctl_dev; const char *ctl_name; }; struct e752x_error_info { u32 ferr_global; u32 nerr_global; u8 hi_ferr; u8 hi_nerr; u16 sysbus_ferr; u16 sysbus_nerr; u8 buf_ferr; u8 buf_nerr; u16 dram_ferr; u16 dram_nerr; u32 dram_sec1_add; u32 dram_sec2_add; u16 dram_sec1_syndrome; u16 dram_sec2_syndrome; u32 dram_ded_add; u32 dram_scrb_add; u32 dram_retr_add; }; static const struct e752x_dev_info e752x_devs[] = { [E7520] = { .err_dev = PCI_DEVICE_ID_INTEL_7520_1_ERR, .ctl_dev = PCI_DEVICE_ID_INTEL_7520_0, .ctl_name = "E7520" }, [E7525] = { .err_dev = PCI_DEVICE_ID_INTEL_7525_1_ERR, .ctl_dev = PCI_DEVICE_ID_INTEL_7525_0, .ctl_name = "E7525" }, [E7320] = { .err_dev = PCI_DEVICE_ID_INTEL_7320_1_ERR, .ctl_dev = PCI_DEVICE_ID_INTEL_7320_0, .ctl_name = "E7320" }, }; static unsigned long ctl_page_to_phys(struct mem_ctl_info *mci, unsigned long page) { u32 remap; struct e752x_pvt *pvt = (struct e752x_pvt *) mci->pvt_info; debugf3("%s()\n", __func__); if (page < pvt->tolm) return page; if ((page >= 0x100000) && (page < pvt->remapbase)) return page; remap = (page - pvt->tolm) + pvt->remapbase; if (remap < pvt->remaplimit) return remap; e752x_printk(KERN_ERR, "Invalid page %lx - out of range\n", page); return pvt->tolm - 1; } static void do_process_ce(struct mem_ctl_info *mci, u16 error_one, u32 sec1_add, u16 sec1_syndrome) { u32 page; int row; int channel; int i; struct e752x_pvt *pvt = (struct e752x_pvt *) mci->pvt_info; debugf3("%s()\n", __func__); /* convert the addr to 4k page */ page = sec1_add >> (PAGE_SHIFT - 4); /* FIXME - check for -1 */ if (pvt->mc_symmetric) { /* chip select are bits 14 & 13 */ row = ((page >> 1) & 3); e752x_printk(KERN_WARNING, "Test row %d Table %d %d %d %d %d %d %d %d\n", row, pvt->map[0], pvt->map[1], pvt->map[2], pvt->map[3], pvt->map[4], pvt->map[5], pvt->map[6], pvt->map[7]); /* test for channel remapping */ for (i = 0; i < 8; i++) { if (pvt->map[i] == row) break; } e752x_printk(KERN_WARNING, "Test computed row %d\n", i); if (i < 8) row = i; else e752x_mc_printk(mci, KERN_WARNING, "row %d not found in remap table\n", row); } else row = edac_mc_find_csrow_by_page(mci, page); /* 0 = channel A, 1 = channel B */ channel = !(error_one & 1); if (!pvt->map_type) row = 7 - row; /* e752x mc reads 34:6 of the DRAM linear address */ edac_mc_handle_ce(mci, page, offset_in_page(sec1_add << 4), sec1_syndrome, row, channel, "e752x CE"); } static inline void process_ce(struct mem_ctl_info *mci, u16 error_one, u32 sec1_add, u16 sec1_syndrome, int *error_found, int handle_error) { *error_found = 1; if (handle_error) do_process_ce(mci, error_one, sec1_add, sec1_syndrome); } static void do_process_ue(struct mem_ctl_info *mci, u16 error_one, u32 ded_add, u32 scrb_add) { u32 error_2b, block_page; int row; struct e752x_pvt *pvt = (struct e752x_pvt *) mci->pvt_info; debugf3("%s()\n", __func__); if (error_one & 0x0202) { error_2b = ded_add; /* convert to 4k address */ block_page = error_2b >> (PAGE_SHIFT - 4); row = pvt->mc_symmetric ? /* chip select are bits 14 & 13 */ ((block_page >> 1) & 3) : edac_mc_find_csrow_by_page(mci, block_page); /* e752x mc reads 34:6 of the DRAM linear address */ edac_mc_handle_ue(mci, block_page, offset_in_page(error_2b << 4), row, "e752x UE from Read"); } if (error_one & 0x0404) { error_2b = scrb_add; /* convert to 4k address */ block_page = error_2b >> (PAGE_SHIFT - 4); row = pvt->mc_symmetric ? /* chip select are bits 14 & 13 */ ((block_page >> 1) & 3) : edac_mc_find_csrow_by_page(mci, block_page); /* e752x mc reads 34:6 of the DRAM linear address */ edac_mc_handle_ue(mci, block_page, offset_in_page(error_2b << 4), row, "e752x UE from Scruber"); } } static inline void process_ue(struct mem_ctl_info *mci, u16 error_one, u32 ded_add, u32 scrb_add, int *error_found, int handle_error) { *error_found = 1; if (handle_error) do_process_ue(mci, error_one, ded_add, scrb_add); } static inline void process_ue_no_info_wr(struct mem_ctl_info *mci, int *error_found, int handle_error) { *error_found = 1; if (!handle_error) return; debugf3("%s()\n", __func__); edac_mc_handle_ue_no_info(mci, "e752x UE log memory write"); } static void do_process_ded_retry(struct mem_ctl_info *mci, u16 error, u32 retry_add) { u32 error_1b, page; int row; struct e752x_pvt *pvt = (struct e752x_pvt *) mci->pvt_info; error_1b = retry_add; page = error_1b >> (PAGE_SHIFT - 4); /* convert the addr to 4k page */ row = pvt->mc_symmetric ? ((page >> 1) & 3) : /* chip select are bits 14 & 13 */ edac_mc_find_csrow_by_page(mci, page); e752x_mc_printk(mci, KERN_WARNING, "CE page 0x%lx, row %d : Memory read retry\n", (long unsigned int) page, row); } static inline void process_ded_retry(struct mem_ctl_info *mci, u16 error, u32 retry_add, int *error_found, int handle_error) { *error_found = 1; if (handle_error) do_process_ded_retry(mci, error, retry_add); } static inline void process_threshold_ce(struct mem_ctl_info *mci, u16 error, int *error_found, int handle_error) { *error_found = 1; if (handle_error) e752x_mc_printk(mci, KERN_WARNING, "Memory threshold CE\n"); } static char *global_message[11] = { "PCI Express C1", "PCI Express C", "PCI Express B1", "PCI Express B", "PCI Express A1", "PCI Express A", "DMA Controler", "HUB Interface", "System Bus", "DRAM Controler", "Internal Buffer" }; static char *fatal_message[2] = { "Non-Fatal ", "Fatal " }; static void do_global_error(int fatal, u32 errors) { int i; for (i = 0; i < 11; i++) { if (errors & (1 << i)) e752x_printk(KERN_WARNING, "%sError %s\n", fatal_message[fatal], global_message[i]); } } static inline void global_error(int fatal, u32 errors, int *error_found, int handle_error) { *error_found = 1; if (handle_error) do_global_error(fatal, errors); } static char *hub_message[7] = { "HI Address or Command Parity", "HI Illegal Access", "HI Internal Parity", "Out of Range Access", "HI Data Parity", "Enhanced Config Access", "Hub Interface Target Abort" }; static void do_hub_error(int fatal, u8 errors) { int i; for (i = 0; i < 7; i++) { if (errors & (1 << i)) e752x_printk(KERN_WARNING, "%sError %s\n", fatal_message[fatal], hub_message[i]); } } static inline void hub_error(int fatal, u8 errors, int *error_found, int handle_error) { *error_found = 1; if (handle_error) do_hub_error(fatal, errors); } static char *membuf_message[4] = { "Internal PMWB to DRAM parity", "Internal PMWB to System Bus Parity", "Internal System Bus or IO to PMWB Parity", "Internal DRAM to PMWB Parity" }; static void do_membuf_error(u8 errors) { int i; for (i = 0; i < 4; i++) { if (errors & (1 << i)) e752x_printk(KERN_WARNING, "Non-Fatal Error %s\n", membuf_message[i]); } } static inline void membuf_error(u8 errors, int *error_found, int handle_error) { *error_found = 1; if (handle_error) do_membuf_error(errors); } static char *sysbus_message[10] = { "Addr or Request Parity", "Data Strobe Glitch", "Addr Strobe Glitch", "Data Parity", "Addr Above TOM", "Non DRAM Lock Error", "MCERR", "BINIT", "Memory Parity", "IO Subsystem Parity" }; static void do_sysbus_error(int fatal, u32 errors) { int i; for (i = 0; i < 10; i++) { if (errors & (1 << i)) e752x_printk(KERN_WARNING, "%sError System Bus %s\n", fatal_message[fatal], sysbus_message[i]); } } static inline void sysbus_error(int fatal, u32 errors, int *error_found, int handle_error) { *error_found = 1; if (handle_error) do_sysbus_error(fatal, errors); } static void e752x_check_hub_interface(struct e752x_error_info *info, int *error_found, int handle_error) { u8 stat8; //pci_read_config_byte(dev,E752X_HI_FERR,&stat8); stat8 = info->hi_ferr; if(stat8 & 0x7f) { /* Error, so process */ stat8 &= 0x7f; if(stat8 & 0x2b) hub_error(1, stat8 & 0x2b, error_found, handle_error); if(stat8 & 0x54) hub_error(0, stat8 & 0x54, error_found, handle_error); } //pci_read_config_byte(dev,E752X_HI_NERR,&stat8); stat8 = info->hi_nerr; if(stat8 & 0x7f) { /* Error, so process */ stat8 &= 0x7f; if (stat8 & 0x2b) hub_error(1, stat8 & 0x2b, error_found, handle_error); if(stat8 & 0x54) hub_error(0, stat8 & 0x54, error_found, handle_error); } } static void e752x_check_sysbus(struct e752x_error_info *info, int *error_found, int handle_error) { u32 stat32, error32; //pci_read_config_dword(dev,E752X_SYSBUS_FERR,&stat32); stat32 = info->sysbus_ferr + (info->sysbus_nerr << 16); if (stat32 == 0) return; /* no errors */ error32 = (stat32 >> 16) & 0x3ff; stat32 = stat32 & 0x3ff; if(stat32 & 0x087) sysbus_error(1, stat32 & 0x087, error_found, handle_error); if(stat32 & 0x378) sysbus_error(0, stat32 & 0x378, error_found, handle_error); if(error32 & 0x087) sysbus_error(1, error32 & 0x087, error_found, handle_error); if(error32 & 0x378) sysbus_error(0, error32 & 0x378, error_found, handle_error); } static void e752x_check_membuf (struct e752x_error_info *info, int *error_found, int handle_error) { u8 stat8; stat8 = info->buf_ferr; if (stat8 & 0x0f) { /* Error, so process */ stat8 &= 0x0f; membuf_error(stat8, error_found, handle_error); } stat8 = info->buf_nerr; if (stat8 & 0x0f) { /* Error, so process */ stat8 &= 0x0f; membuf_error(stat8, error_found, handle_error); } } static void e752x_check_dram (struct mem_ctl_info *mci, struct e752x_error_info *info, int *error_found, int handle_error) { u16 error_one, error_next; error_one = info->dram_ferr; error_next = info->dram_nerr; /* decode and report errors */ if(error_one & 0x0101) /* check first error correctable */ process_ce(mci, error_one, info->dram_sec1_add, info->dram_sec1_syndrome, error_found, handle_error); if(error_next & 0x0101) /* check next error correctable */ process_ce(mci, error_next, info->dram_sec2_add, info->dram_sec2_syndrome, error_found, handle_error); if(error_one & 0x4040) process_ue_no_info_wr(mci, error_found, handle_error); if(error_next & 0x4040) process_ue_no_info_wr(mci, error_found, handle_error); if(error_one & 0x2020) process_ded_retry(mci, error_one, info->dram_retr_add, error_found, handle_error); if(error_next & 0x2020) process_ded_retry(mci, error_next, info->dram_retr_add, error_found, handle_error); if(error_one & 0x0808) process_threshold_ce(mci, error_one, error_found, handle_error); if(error_next & 0x0808) process_threshold_ce(mci, error_next, error_found, handle_error); if(error_one & 0x0606) process_ue(mci, error_one, info->dram_ded_add, info->dram_scrb_add, error_found, handle_error); if(error_next & 0x0606) process_ue(mci, error_next, info->dram_ded_add, info->dram_scrb_add, error_found, handle_error); } static void e752x_get_error_info (struct mem_ctl_info *mci, struct e752x_error_info *info) { struct pci_dev *dev; struct e752x_pvt *pvt; memset(info, 0, sizeof(*info)); pvt = (struct e752x_pvt *) mci->pvt_info; dev = pvt->dev_d0f1; pci_read_config_dword(dev, E752X_FERR_GLOBAL, &info->ferr_global); if (info->ferr_global) { pci_read_config_byte(dev, E752X_HI_FERR, &info->hi_ferr); pci_read_config_word(dev, E752X_SYSBUS_FERR, &info->sysbus_ferr); pci_read_config_byte(dev, E752X_BUF_FERR, &info->buf_ferr); pci_read_config_word(dev, E752X_DRAM_FERR, &info->dram_ferr); pci_read_config_dword(dev, E752X_DRAM_SEC1_ADD, &info->dram_sec1_add); pci_read_config_word(dev, E752X_DRAM_SEC1_SYNDROME, &info->dram_sec1_syndrome); pci_read_config_dword(dev, E752X_DRAM_DED_ADD, &info->dram_ded_add); pci_read_config_dword(dev, E752X_DRAM_SCRB_ADD, &info->dram_scrb_add); pci_read_config_dword(dev, E752X_DRAM_RETR_ADD, &info->dram_retr_add); if (info->hi_ferr & 0x7f) pci_write_config_byte(dev, E752X_HI_FERR, info->hi_ferr); if (info->sysbus_ferr) pci_write_config_word(dev, E752X_SYSBUS_FERR, info->sysbus_ferr); if (info->buf_ferr & 0x0f) pci_write_config_byte(dev, E752X_BUF_FERR, info->buf_ferr); if (info->dram_ferr) pci_write_bits16(pvt->bridge_ck, E752X_DRAM_FERR, info->dram_ferr, info->dram_ferr); pci_write_config_dword(dev, E752X_FERR_GLOBAL, info->ferr_global); } pci_read_config_dword(dev, E752X_NERR_GLOBAL, &info->nerr_global); if (info->nerr_global) { pci_read_config_byte(dev, E752X_HI_NERR, &info->hi_nerr); pci_read_config_word(dev, E752X_SYSBUS_NERR, &info->sysbus_nerr); pci_read_config_byte(dev, E752X_BUF_NERR, &info->buf_nerr); pci_read_config_word(dev, E752X_DRAM_NERR, &info->dram_nerr); pci_read_config_dword(dev, E752X_DRAM_SEC2_ADD, &info->dram_sec2_add); pci_read_config_word(dev, E752X_DRAM_SEC2_SYNDROME, &info->dram_sec2_syndrome); if (info->hi_nerr & 0x7f) pci_write_config_byte(dev, E752X_HI_NERR, info->hi_nerr); if (info->sysbus_nerr) pci_write_config_word(dev, E752X_SYSBUS_NERR, info->sysbus_nerr); if (info->buf_nerr & 0x0f) pci_write_config_byte(dev, E752X_BUF_NERR, info->buf_nerr); if (info->dram_nerr) pci_write_bits16(pvt->bridge_ck, E752X_DRAM_NERR, info->dram_nerr, info->dram_nerr); pci_write_config_dword(dev, E752X_NERR_GLOBAL, info->nerr_global); } } static int e752x_process_error_info (struct mem_ctl_info *mci, struct e752x_error_info *info, int handle_errors) { u32 error32, stat32; int error_found; error_found = 0; error32 = (info->ferr_global >> 18) & 0x3ff; stat32 = (info->ferr_global >> 4) & 0x7ff; if (error32) global_error(1, error32, &error_found, handle_errors); if (stat32) global_error(0, stat32, &error_found, handle_errors); error32 = (info->nerr_global >> 18) & 0x3ff; stat32 = (info->nerr_global >> 4) & 0x7ff; if (error32) global_error(1, error32, &error_found, handle_errors); if (stat32) global_error(0, stat32, &error_found, handle_errors); e752x_check_hub_interface(info, &error_found, handle_errors); e752x_check_sysbus(info, &error_found, handle_errors); e752x_check_membuf(info, &error_found, handle_errors); e752x_check_dram(mci, info, &error_found, handle_errors); return error_found; } static void e752x_check(struct mem_ctl_info *mci) { struct e752x_error_info info; debugf3("%s()\n", __func__); e752x_get_error_info(mci, &info); e752x_process_error_info(mci, &info, 1); } /* Return 1 if dual channel mode is active. Else return 0. */ static inline int dual_channel_active(u16 ddrcsr) { return (((ddrcsr >> 12) & 3) == 3); } static void e752x_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev, u16 ddrcsr) { struct csrow_info *csrow; unsigned long last_cumul_size; int index, mem_dev, drc_chan; int drc_drbg; /* DRB granularity 0=64mb, 1=128mb */ int drc_ddim; /* DRAM Data Integrity Mode 0=none, 2=edac */ u8 value; u32 dra, drc, cumul_size; dra = 0; for (index=0; index < 4; index++) { u8 dra_reg; pci_read_config_byte(pdev, E752X_DRA+index, &dra_reg); dra |= dra_reg << (index * 8); } pci_read_config_dword(pdev, E752X_DRC, &drc); drc_chan = dual_channel_active(ddrcsr); drc_drbg = drc_chan + 1; /* 128 in dual mode, 64 in single */ drc_ddim = (drc >> 20) & 0x3; /* The dram row boundary (DRB) reg values are boundary address for * each DRAM row with a granularity of 64 or 128MB (single/dual * channel operation). DRB regs are cumulative; therefore DRB7 will * contain the total memory contained in all eight rows. */ for (last_cumul_size = index = 0; index < mci->nr_csrows; index++) { /* mem_dev 0=x8, 1=x4 */ mem_dev = (dra >> (index * 4 + 2)) & 0x3; csrow = &mci->csrows[index]; mem_dev = (mem_dev == 2); pci_read_config_byte(pdev, E752X_DRB + index, &value); /* convert a 128 or 64 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 void e752x_init_mem_map_table(struct pci_dev *pdev, struct e752x_pvt *pvt) { int index; u8 value, last, row, stat8; last = 0; row = 0; for (index = 0; index < 8; index += 2) { pci_read_config_byte(pdev, E752X_DRB + index, &value); /* test if there is a dimm in this slot */ if (value == last) { /* no dimm in the slot, so flag it as empty */ pvt->map[index] = 0xff; pvt->map[index + 1] = 0xff; } else { /* there is a dimm in the slot */ pvt->map[index] = row; row++; last = value; /* test the next value to see if the dimm is double * sided */ pci_read_config_byte(pdev, E752X_DRB + index + 1, &value); pvt->map[index + 1] = (value == last) ? 0xff : /* the dimm is single sided, so flag as empty */ row; /* this is a double sided dimm to save the next row # */ row++; last = value; } } /* set the map type. 1 = normal, 0 = reversed */ pci_read_config_byte(pdev, E752X_DRM, &stat8); pvt->map_type = ((stat8 & 0x0f) > ((stat8 >> 4) & 0x0f)); } /* Return 0 on success or 1 on failure. */ static int e752x_get_devs(struct pci_dev *pdev, int dev_idx, struct e752x_pvt *pvt) { struct pci_dev *dev; pvt->bridge_ck = pci_get_device(PCI_VENDOR_ID_INTEL, pvt->dev_info->err_dev, pvt->bridge_ck); if (pvt->bridge_ck == NULL) pvt->bridge_ck = pci_scan_single_device(pdev->bus, PCI_DEVFN(0, 1)); if (pvt->bridge_ck == NULL) { e752x_printk(KERN_ERR, "error reporting device not found:" "vendor %x device 0x%x (broken BIOS?)\n", PCI_VENDOR_ID_INTEL, e752x_devs[dev_idx].err_dev); return 1; } dev = pci_get_device(PCI_VENDOR_ID_INTEL, e752x_devs[dev_idx].ctl_dev, NULL); if (dev == NULL) goto fail; pvt->dev_d0f0 = dev; pvt->dev_d0f1 = pci_dev_get(pvt->bridge_ck); return 0; fail: pci_dev_put(pvt->bridge_ck); return 1; } static void e752x_init_error_reporting_regs(struct e752x_pvt *pvt) { struct pci_dev *dev; dev = pvt->dev_d0f1; /* Turn off error disable & SMI in case the BIOS turned it on */ pci_write_config_byte(dev, E752X_HI_ERRMASK, 0x00); pci_write_config_byte(dev, E752X_HI_SMICMD, 0x00); pci_write_config_word(dev, E752X_SYSBUS_ERRMASK, 0x00); pci_write_config_word(dev, E752X_SYSBUS_SMICMD, 0x00); pci_write_config_byte(dev, E752X_BUF_ERRMASK, 0x00); pci_write_config_byte(dev, E752X_BUF_SMICMD, 0x00); pci_write_config_byte(dev, E752X_DRAM_ERRMASK, 0x00); pci_write_config_byte(dev, E752X_DRAM_SMICMD, 0x00); } static int e752x_probe1(struct pci_dev *pdev, int dev_idx) { u16 pci_data; u8 stat8; struct mem_ctl_info *mci; struct e752x_pvt *pvt; u16 ddrcsr; int drc_chan; /* Number of channels 0=1chan,1=2chan */ struct e752x_error_info discard; debugf0("%s(): mci\n", __func__); debugf0("Starting Probe1\n"); /* check to see if device 0 function 1 is enabled; if it isn't, we * assume the BIOS has reserved it for a reason and is expecting * exclusive access, we take care not to violate that assumption and * fail the probe. */ pci_read_config_byte(pdev, E752X_DEVPRES1, &stat8); if (!force_function_unhide && !(stat8 & (1 << 5))) { printk(KERN_INFO "Contact your BIOS vendor to see if the " "E752x error registers can be safely un-hidden\n"); return -ENOMEM; } stat8 |= (1 << 5); pci_write_config_byte(pdev, E752X_DEVPRES1, stat8); pci_read_config_word(pdev, E752X_DDRCSR, &ddrcsr); /* FIXME: should check >>12 or 0xf, true for all? */ /* Dual channel = 1, Single channel = 0 */ drc_chan = dual_channel_active(ddrcsr); mci = edac_mc_alloc(sizeof(*pvt), E752X_NR_CSROWS, drc_chan + 1); 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 = E752X_REVISION; mci->dev = &pdev->dev; debugf3("%s(): init pvt\n", __func__); pvt = (struct e752x_pvt *) mci->pvt_info; pvt->dev_info = &e752x_devs[dev_idx]; pvt->mc_symmetric = ((ddrcsr & 0x10) != 0); if (e752x_get_devs(pdev, dev_idx, pvt)) { edac_mc_free(mci); return -ENODEV; } debugf3("%s(): more mci init\n", __func__); mci->ctl_name = pvt->dev_info->ctl_name; mci->edac_check = e752x_check; mci->ctl_page_to_phys = ctl_page_to_phys; e752x_init_csrows(mci, pdev, ddrcsr); e752x_init_mem_map_table(pdev, pvt); /* set the map type. 1 = normal, 0 = reversed */ pci_read_config_byte(pdev, E752X_DRM, &stat8); pvt->map_type = ((stat8 & 0x0f) > ((stat8 >> 4) & 0x0f)); 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, E752X_TOLM, &pci_data); pvt->tolm = ((u32) pci_data) << 4; pci_read_config_word(pdev, E752X_REMAPBASE, &pci_data); pvt->remapbase = ((u32) pci_data) << 14; pci_read_config_word(pdev, E752X_REMAPLIMIT, &pci_data); pvt->remaplimit = ((u32) pci_data) << 14; e752x_printk(KERN_INFO, "tolm = %x, remapbase = %x, remaplimit = %x\n", pvt->tolm, pvt->remapbase, pvt->remaplimit); /* 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,0)) { debugf3("%s(): failed edac_mc_add_mc()\n", __func__); goto fail; } e752x_init_error_reporting_regs(pvt); e752x_get_error_info(mci, &discard); /* clear other MCH errors */ /* get this far and it's successful */ debugf3("%s(): success\n", __func__); return 0; fail: pci_dev_put(pvt->dev_d0f0); pci_dev_put(pvt->dev_d0f1); pci_dev_put(pvt->bridge_ck); edac_mc_free(mci); return -ENODEV; } /* returns count (>= 0), or negative on error */ static int __devinit e752x_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { debugf0("%s()\n", __func__); /* wake up and enable device */ if(pci_enable_device(pdev) < 0) return -EIO; return e752x_probe1(pdev, ent->driver_data); } static void __devexit e752x_remove_one(struct pci_dev *pdev) { struct mem_ctl_info *mci; struct e752x_pvt *pvt; debugf0("%s()\n", __func__); if ((mci = edac_mc_del_mc(&pdev->dev)) == NULL) return; pvt = (struct e752x_pvt *) mci->pvt_info; pci_dev_put(pvt->dev_d0f0); pci_dev_put(pvt->dev_d0f1); pci_dev_put(pvt->bridge_ck); edac_mc_free(mci); } static const struct pci_device_id e752x_pci_tbl[] __devinitdata = { { PCI_VEND_DEV(INTEL, 7520_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0, E7520 }, { PCI_VEND_DEV(INTEL, 7525_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0, E7525 }, { PCI_VEND_DEV(INTEL, 7320_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0, E7320 }, { 0, } /* 0 terminated list. */ }; MODULE_DEVICE_TABLE(pci, e752x_pci_tbl); static struct pci_driver e752x_driver = { .name = EDAC_MOD_STR, .probe = e752x_init_one, .remove = __devexit_p(e752x_remove_one), .id_table = e752x_pci_tbl, }; static int __init e752x_init(void) { int pci_rc; debugf3("%s()\n", __func__); pci_rc = pci_register_driver(&e752x_driver); return (pci_rc < 0) ? pci_rc : 0; } static void __exit e752x_exit(void) { debugf3("%s()\n", __func__); pci_unregister_driver(&e752x_driver); } module_init(e752x_init); module_exit(e752x_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Linux Networx (http://lnxi.com) Tom Zimmerman\n"); MODULE_DESCRIPTION("MC support for Intel e752x memory controllers"); module_param(force_function_unhide, int, 0444); MODULE_PARM_DESC(force_function_unhide, "if BIOS sets Dev0:Fun1 up as hidden:" " 1=force unhide and hope BIOS doesn't fight driver for Dev0:Fun1 access");