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![Borislav Petkov](/assets/img/avatar_default.png)
They have been spreading around the subsystem by example so remove them all. Reported-by: Raymond Bennett <raymond.bennett@gmail.com> Suggested-by: Jason Baron <jbaron@akamai.com> Signed-off-by: Borislav Petkov <bp@suse.de>
603 lines
16 KiB
C
603 lines
16 KiB
C
/*
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* Intel e7xxx Memory Controller kernel module
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* (C) 2003 Linux Networx (http://lnxi.com)
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* This file may be distributed under the terms of the
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* GNU General Public License.
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*
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* See "enum e7xxx_chips" below for supported chipsets
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*
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* Written by Thayne Harbaugh
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* Based on work by Dan Hollis <goemon at anime dot net> and others.
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* http://www.anime.net/~goemon/linux-ecc/
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*
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* Datasheet:
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* http://www.intel.com/content/www/us/en/chipsets/e7501-chipset-memory-controller-hub-datasheet.html
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*
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* Contributors:
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* Eric Biederman (Linux Networx)
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* Tom Zimmerman (Linux Networx)
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* Jim Garlick (Lawrence Livermore National Labs)
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* Dave Peterson (Lawrence Livermore National Labs)
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* That One Guy (Some other place)
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* Wang Zhenyu (intel.com)
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*
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* $Id: edac_e7xxx.c,v 1.5.2.9 2005/10/05 00:43:44 dsp_llnl Exp $
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*
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/pci_ids.h>
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#include <linux/edac.h>
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#include "edac_module.h"
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#define EDAC_MOD_STR "e7xxx_edac"
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#define e7xxx_printk(level, fmt, arg...) \
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edac_printk(level, "e7xxx", fmt, ##arg)
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#define e7xxx_mc_printk(mci, level, fmt, arg...) \
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edac_mc_chipset_printk(mci, level, "e7xxx", fmt, ##arg)
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#ifndef PCI_DEVICE_ID_INTEL_7205_0
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#define PCI_DEVICE_ID_INTEL_7205_0 0x255d
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#endif /* PCI_DEVICE_ID_INTEL_7205_0 */
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#ifndef PCI_DEVICE_ID_INTEL_7205_1_ERR
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#define PCI_DEVICE_ID_INTEL_7205_1_ERR 0x2551
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#endif /* PCI_DEVICE_ID_INTEL_7205_1_ERR */
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#ifndef PCI_DEVICE_ID_INTEL_7500_0
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#define PCI_DEVICE_ID_INTEL_7500_0 0x2540
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#endif /* PCI_DEVICE_ID_INTEL_7500_0 */
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#ifndef PCI_DEVICE_ID_INTEL_7500_1_ERR
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#define PCI_DEVICE_ID_INTEL_7500_1_ERR 0x2541
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#endif /* PCI_DEVICE_ID_INTEL_7500_1_ERR */
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#ifndef PCI_DEVICE_ID_INTEL_7501_0
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#define PCI_DEVICE_ID_INTEL_7501_0 0x254c
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#endif /* PCI_DEVICE_ID_INTEL_7501_0 */
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#ifndef PCI_DEVICE_ID_INTEL_7501_1_ERR
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#define PCI_DEVICE_ID_INTEL_7501_1_ERR 0x2541
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#endif /* PCI_DEVICE_ID_INTEL_7501_1_ERR */
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#ifndef PCI_DEVICE_ID_INTEL_7505_0
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#define PCI_DEVICE_ID_INTEL_7505_0 0x2550
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#endif /* PCI_DEVICE_ID_INTEL_7505_0 */
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#ifndef PCI_DEVICE_ID_INTEL_7505_1_ERR
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#define PCI_DEVICE_ID_INTEL_7505_1_ERR 0x2551
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#endif /* PCI_DEVICE_ID_INTEL_7505_1_ERR */
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#define E7XXX_NR_CSROWS 8 /* number of csrows */
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#define E7XXX_NR_DIMMS 8 /* 2 channels, 4 dimms/channel */
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/* E7XXX register addresses - device 0 function 0 */
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#define E7XXX_DRB 0x60 /* DRAM row boundary register (8b) */
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#define E7XXX_DRA 0x70 /* DRAM row attribute register (8b) */
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/*
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* 31 Device width row 7 0=x8 1=x4
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* 27 Device width row 6
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* 23 Device width row 5
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* 19 Device width row 4
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* 15 Device width row 3
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* 11 Device width row 2
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* 7 Device width row 1
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* 3 Device width row 0
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*/
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#define E7XXX_DRC 0x7C /* DRAM controller mode reg (32b) */
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/*
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* 22 Number channels 0=1,1=2
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* 19:18 DRB Granularity 32/64MB
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*/
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#define E7XXX_TOLM 0xC4 /* DRAM top of low memory reg (16b) */
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#define E7XXX_REMAPBASE 0xC6 /* DRAM remap base address reg (16b) */
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#define E7XXX_REMAPLIMIT 0xC8 /* DRAM remap limit address reg (16b) */
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/* E7XXX register addresses - device 0 function 1 */
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#define E7XXX_DRAM_FERR 0x80 /* DRAM first error register (8b) */
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#define E7XXX_DRAM_NERR 0x82 /* DRAM next error register (8b) */
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#define E7XXX_DRAM_CELOG_ADD 0xA0 /* DRAM first correctable memory */
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/* error address register (32b) */
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/*
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* 31:28 Reserved
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* 27:6 CE address (4k block 33:12)
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* 5:0 Reserved
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*/
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#define E7XXX_DRAM_UELOG_ADD 0xB0 /* DRAM first uncorrectable memory */
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/* error address register (32b) */
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/*
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* 31:28 Reserved
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* 27:6 CE address (4k block 33:12)
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* 5:0 Reserved
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*/
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#define E7XXX_DRAM_CELOG_SYNDROME 0xD0 /* DRAM first correctable memory */
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/* error syndrome register (16b) */
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enum e7xxx_chips {
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E7500 = 0,
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E7501,
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E7505,
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E7205,
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};
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struct e7xxx_pvt {
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struct pci_dev *bridge_ck;
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u32 tolm;
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u32 remapbase;
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u32 remaplimit;
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const struct e7xxx_dev_info *dev_info;
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};
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struct e7xxx_dev_info {
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u16 err_dev;
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const char *ctl_name;
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};
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struct e7xxx_error_info {
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u8 dram_ferr;
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u8 dram_nerr;
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u32 dram_celog_add;
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u16 dram_celog_syndrome;
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u32 dram_uelog_add;
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};
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static struct edac_pci_ctl_info *e7xxx_pci;
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static const struct e7xxx_dev_info e7xxx_devs[] = {
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[E7500] = {
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.err_dev = PCI_DEVICE_ID_INTEL_7500_1_ERR,
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.ctl_name = "E7500"},
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[E7501] = {
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.err_dev = PCI_DEVICE_ID_INTEL_7501_1_ERR,
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.ctl_name = "E7501"},
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[E7505] = {
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.err_dev = PCI_DEVICE_ID_INTEL_7505_1_ERR,
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.ctl_name = "E7505"},
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[E7205] = {
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.err_dev = PCI_DEVICE_ID_INTEL_7205_1_ERR,
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.ctl_name = "E7205"},
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};
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/* FIXME - is this valid for both SECDED and S4ECD4ED? */
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static inline int e7xxx_find_channel(u16 syndrome)
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{
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edac_dbg(3, "\n");
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if ((syndrome & 0xff00) == 0)
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return 0;
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if ((syndrome & 0x00ff) == 0)
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return 1;
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if ((syndrome & 0xf000) == 0 || (syndrome & 0x0f00) == 0)
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return 0;
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return 1;
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}
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static unsigned long ctl_page_to_phys(struct mem_ctl_info *mci,
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unsigned long page)
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{
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u32 remap;
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struct e7xxx_pvt *pvt = (struct e7xxx_pvt *)mci->pvt_info;
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edac_dbg(3, "\n");
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if ((page < pvt->tolm) ||
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((page >= 0x100000) && (page < pvt->remapbase)))
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return page;
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remap = (page - pvt->tolm) + pvt->remapbase;
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if (remap < pvt->remaplimit)
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return remap;
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e7xxx_printk(KERN_ERR, "Invalid page %lx - out of range\n", page);
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return pvt->tolm - 1;
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}
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static void process_ce(struct mem_ctl_info *mci, struct e7xxx_error_info *info)
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{
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u32 error_1b, page;
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u16 syndrome;
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int row;
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int channel;
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edac_dbg(3, "\n");
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/* read the error address */
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error_1b = info->dram_celog_add;
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/* FIXME - should use PAGE_SHIFT */
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page = error_1b >> 6; /* convert the address to 4k page */
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/* read the syndrome */
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syndrome = info->dram_celog_syndrome;
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/* FIXME - check for -1 */
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row = edac_mc_find_csrow_by_page(mci, page);
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/* convert syndrome to channel */
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channel = e7xxx_find_channel(syndrome);
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edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, page, 0, syndrome,
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row, channel, -1, "e7xxx CE", "");
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}
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static void process_ce_no_info(struct mem_ctl_info *mci)
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{
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edac_dbg(3, "\n");
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edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, 0, 0, 0, -1, -1, -1,
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"e7xxx CE log register overflow", "");
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}
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static void process_ue(struct mem_ctl_info *mci, struct e7xxx_error_info *info)
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{
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u32 error_2b, block_page;
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int row;
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edac_dbg(3, "\n");
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/* read the error address */
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error_2b = info->dram_uelog_add;
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/* FIXME - should use PAGE_SHIFT */
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block_page = error_2b >> 6; /* convert to 4k address */
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row = edac_mc_find_csrow_by_page(mci, block_page);
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edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, block_page, 0, 0,
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row, -1, -1, "e7xxx UE", "");
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}
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static void process_ue_no_info(struct mem_ctl_info *mci)
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{
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edac_dbg(3, "\n");
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edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 0, 0, 0, -1, -1, -1,
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"e7xxx UE log register overflow", "");
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}
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static void e7xxx_get_error_info(struct mem_ctl_info *mci,
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struct e7xxx_error_info *info)
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{
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struct e7xxx_pvt *pvt;
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pvt = (struct e7xxx_pvt *)mci->pvt_info;
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pci_read_config_byte(pvt->bridge_ck, E7XXX_DRAM_FERR, &info->dram_ferr);
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pci_read_config_byte(pvt->bridge_ck, E7XXX_DRAM_NERR, &info->dram_nerr);
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if ((info->dram_ferr & 1) || (info->dram_nerr & 1)) {
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pci_read_config_dword(pvt->bridge_ck, E7XXX_DRAM_CELOG_ADD,
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&info->dram_celog_add);
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pci_read_config_word(pvt->bridge_ck,
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E7XXX_DRAM_CELOG_SYNDROME,
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&info->dram_celog_syndrome);
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}
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if ((info->dram_ferr & 2) || (info->dram_nerr & 2))
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pci_read_config_dword(pvt->bridge_ck, E7XXX_DRAM_UELOG_ADD,
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&info->dram_uelog_add);
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if (info->dram_ferr & 3)
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pci_write_bits8(pvt->bridge_ck, E7XXX_DRAM_FERR, 0x03, 0x03);
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if (info->dram_nerr & 3)
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pci_write_bits8(pvt->bridge_ck, E7XXX_DRAM_NERR, 0x03, 0x03);
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}
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static int e7xxx_process_error_info(struct mem_ctl_info *mci,
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struct e7xxx_error_info *info,
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int handle_errors)
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{
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int error_found;
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error_found = 0;
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/* decode and report errors */
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if (info->dram_ferr & 1) { /* check first error correctable */
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error_found = 1;
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if (handle_errors)
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process_ce(mci, info);
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}
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if (info->dram_ferr & 2) { /* check first error uncorrectable */
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error_found = 1;
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if (handle_errors)
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process_ue(mci, info);
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}
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if (info->dram_nerr & 1) { /* check next error correctable */
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error_found = 1;
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if (handle_errors) {
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if (info->dram_ferr & 1)
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process_ce_no_info(mci);
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else
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process_ce(mci, info);
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}
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}
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if (info->dram_nerr & 2) { /* check next error uncorrectable */
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error_found = 1;
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if (handle_errors) {
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if (info->dram_ferr & 2)
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process_ue_no_info(mci);
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else
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process_ue(mci, info);
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}
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}
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return error_found;
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}
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static void e7xxx_check(struct mem_ctl_info *mci)
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{
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struct e7xxx_error_info info;
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e7xxx_get_error_info(mci, &info);
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e7xxx_process_error_info(mci, &info, 1);
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}
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/* Return 1 if dual channel mode is active. Else return 0. */
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static inline int dual_channel_active(u32 drc, int dev_idx)
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{
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return (dev_idx == E7501) ? ((drc >> 22) & 0x1) : 1;
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}
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/* Return DRB granularity (0=32mb, 1=64mb). */
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static inline int drb_granularity(u32 drc, int dev_idx)
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{
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/* only e7501 can be single channel */
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return (dev_idx == E7501) ? ((drc >> 18) & 0x3) : 1;
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}
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static void e7xxx_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev,
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int dev_idx, u32 drc)
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{
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unsigned long last_cumul_size;
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int index, j;
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u8 value;
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u32 dra, cumul_size, nr_pages;
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int drc_chan, drc_drbg, drc_ddim, mem_dev;
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struct csrow_info *csrow;
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struct dimm_info *dimm;
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enum edac_type edac_mode;
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pci_read_config_dword(pdev, E7XXX_DRA, &dra);
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drc_chan = dual_channel_active(drc, dev_idx);
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drc_drbg = drb_granularity(drc, dev_idx);
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drc_ddim = (drc >> 20) & 0x3;
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last_cumul_size = 0;
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/* The dram row boundary (DRB) reg values are boundary address
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* for each DRAM row with a granularity of 32 or 64MB (single/dual
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* channel operation). DRB regs are cumulative; therefore DRB7 will
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* contain the total memory contained in all eight rows.
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*/
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for (index = 0; index < mci->nr_csrows; index++) {
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/* mem_dev 0=x8, 1=x4 */
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mem_dev = (dra >> (index * 4 + 3)) & 0x1;
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csrow = mci->csrows[index];
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pci_read_config_byte(pdev, E7XXX_DRB + index, &value);
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/* convert a 64 or 32 MiB DRB to a page size. */
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cumul_size = value << (25 + drc_drbg - PAGE_SHIFT);
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edac_dbg(3, "(%d) cumul_size 0x%x\n", index, cumul_size);
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if (cumul_size == last_cumul_size)
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continue; /* not populated */
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csrow->first_page = last_cumul_size;
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csrow->last_page = cumul_size - 1;
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nr_pages = cumul_size - last_cumul_size;
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last_cumul_size = cumul_size;
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/*
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* if single channel or x8 devices then SECDED
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* if dual channel and x4 then S4ECD4ED
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*/
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if (drc_ddim) {
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if (drc_chan && mem_dev) {
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edac_mode = EDAC_S4ECD4ED;
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mci->edac_cap |= EDAC_FLAG_S4ECD4ED;
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} else {
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edac_mode = EDAC_SECDED;
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mci->edac_cap |= EDAC_FLAG_SECDED;
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}
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} else
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edac_mode = EDAC_NONE;
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for (j = 0; j < drc_chan + 1; j++) {
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dimm = csrow->channels[j]->dimm;
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dimm->nr_pages = nr_pages / (drc_chan + 1);
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dimm->grain = 1 << 12; /* 4KiB - resolution of CELOG */
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dimm->mtype = MEM_RDDR; /* only one type supported */
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dimm->dtype = mem_dev ? DEV_X4 : DEV_X8;
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dimm->edac_mode = edac_mode;
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}
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}
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}
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static int e7xxx_probe1(struct pci_dev *pdev, int dev_idx)
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{
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u16 pci_data;
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struct mem_ctl_info *mci = NULL;
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struct edac_mc_layer layers[2];
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struct e7xxx_pvt *pvt = NULL;
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u32 drc;
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int drc_chan;
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struct e7xxx_error_info discard;
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edac_dbg(0, "mci\n");
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pci_read_config_dword(pdev, E7XXX_DRC, &drc);
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drc_chan = dual_channel_active(drc, dev_idx);
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/*
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* According with the datasheet, this device has a maximum of
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* 4 DIMMS per channel, either single-rank or dual-rank. So, the
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* total amount of dimms is 8 (E7XXX_NR_DIMMS).
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* That means that the DIMM is mapped as CSROWs, and the channel
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* will map the rank. So, an error to either channel should be
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* attributed to the same dimm.
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*/
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layers[0].type = EDAC_MC_LAYER_CHIP_SELECT;
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layers[0].size = E7XXX_NR_CSROWS;
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layers[0].is_virt_csrow = true;
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layers[1].type = EDAC_MC_LAYER_CHANNEL;
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layers[1].size = drc_chan + 1;
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layers[1].is_virt_csrow = false;
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mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers, sizeof(*pvt));
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if (mci == NULL)
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return -ENOMEM;
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edac_dbg(3, "init mci\n");
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mci->mtype_cap = MEM_FLAG_RDDR;
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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->pdev = &pdev->dev;
|
|
edac_dbg(3, "init pvt\n");
|
|
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;
|
|
}
|
|
|
|
edac_dbg(3, "more mci init\n");
|
|
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;
|
|
edac_dbg(3, "tolm, remapbase, remaplimit\n");
|
|
/* 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)) {
|
|
edac_dbg(3, "failed edac_mc_add_mc()\n");
|
|
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 */
|
|
edac_dbg(3, "success\n");
|
|
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 e7xxx_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
|
|
{
|
|
edac_dbg(0, "\n");
|
|
|
|
/* wake up and enable device */
|
|
return pci_enable_device(pdev) ?
|
|
-EIO : e7xxx_probe1(pdev, ent->driver_data);
|
|
}
|
|
|
|
static void e7xxx_remove_one(struct pci_dev *pdev)
|
|
{
|
|
struct mem_ctl_info *mci;
|
|
struct e7xxx_pvt *pvt;
|
|
|
|
edac_dbg(0, "\n");
|
|
|
|
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[] = {
|
|
{
|
|
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 = 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");
|