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linux/drivers/edac/e752x_edac.c
Alan Cox da9bb1d27b [PATCH] EDAC: core EDAC support code 
This is a subset of the bluesmoke project core code, stripped of the NMI work
which isn't ready to merge and some of the "interesting" proc functionality
that needs reworking or just has no place in kernel.  It requires no core
kernel changes except the added scrub functions already posted.

The goal is to merge further functionality only after the core code is
accepted and proven in the base kernel, and only at the point the upstream
extras are really ready to merge.

From: doug thompson <norsk5@xmission.com>

  This converts EDAC to sysfs and is the final chunk neccessary before EDAC
  has a stable user space API and can be considered for submission into the
  base kernel.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: doug thompson <norsk5@xmission.com>
Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-18 19:20:31 -08:00

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/*
* 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/config.h>
#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"
#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;
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_name = "E7520"},
[E7525] = {
.err_dev = PCI_DEVICE_ID_INTEL_7525_1_ERR,
.ctl_name = "E7525"},
[E7320] = {
.err_dev = PCI_DEVICE_ID_INTEL_7320_1_ERR,
.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("MC: " __FILE__ ": %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;
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("MC: " __FILE__ ": %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);
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;
}
printk(KERN_WARNING "Test computed row %d\n", i);
if (i < 8)
row = i;
else
printk(KERN_WARNING
"MC%d: row %d not found in remap table\n",
mci->mc_idx, 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;
edac_mc_handle_ce(mci, page, 0, 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("MC: " __FILE__ ": %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);
edac_mc_handle_ue(mci, block_page, 0, 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);
edac_mc_handle_ue(mci, block_page, 0, 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("MC: " __FILE__ ": %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);
printk(KERN_WARNING
"MC%d: CE page 0x%lx, row %d : Memory read retry\n",
mci->mc_idx, (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)
printk(KERN_WARNING "MC%d: Memory threshold CE\n",
mci->mc_idx);
}
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))
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))
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))
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);
}
#if 0
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"
};
#endif /* 0 */
static void do_sysbus_error(int fatal, u32 errors)
{
int i;
for (i = 0; i < 10; i++) {
if (errors & (1 << i))
printk(KERN_WARNING "%sError System Bus %s\n",
fatal_message[fatal], global_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 & 0x083)
sysbus_error(1, stat32 & 0x083, error_found, handle_error);
if(stat32 & 0x37c)
sysbus_error(0, stat32 & 0x37c, error_found, handle_error);
if(error32 & 0x083)
sysbus_error(1, error32 & 0x083, error_found, handle_error);
if(error32 & 0x37c)
sysbus_error(0, error32 & 0x37c, 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("MC: " __FILE__ ": %s()\n", __func__);
e752x_get_error_info(mci, &info);
e752x_process_error_info(mci, &info, 1);
}
static int e752x_probe1(struct pci_dev *pdev, int dev_idx)
{
int rc = -ENODEV;
int index;
u16 pci_data, stat;
u32 stat32;
u16 stat16;
u8 stat8;
struct mem_ctl_info *mci = NULL;
struct e752x_pvt *pvt = NULL;
u16 ddrcsr;
u32 drc;
int drc_chan; /* Number of channels 0=1chan,1=2chan */
int drc_drbg; /* DRB granularity 0=64mb,1=128mb */
int drc_ddim; /* DRAM Data Integrity Mode 0=none,2=edac */
u32 dra;
unsigned long last_cumul_size;
struct pci_dev *pres_dev;
struct pci_dev *dev = NULL;
debugf0("MC: " __FILE__ ": %s(): mci\n", __func__);
debugf0("Starting Probe1\n");
/* enable device 0 function 1 */
pci_read_config_byte(pdev, E752X_DEVPRES1, &stat8);
stat8 |= (1 << 5);
pci_write_config_byte(pdev, E752X_DEVPRES1, stat8);
/* need to find out the number of channels */
pci_read_config_dword(pdev, E752X_DRC, &drc);
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 = (((ddrcsr >> 12) & 3) == 3);
drc_drbg = drc_chan + 1; /* 128 in dual mode, 64 in single */
drc_ddim = (drc >> 20) & 0x3;
mci = edac_mc_alloc(sizeof(*pvt), E752X_NR_CSROWS, drc_chan + 1);
if (mci == NULL) {
rc = -ENOMEM;
goto fail;
}
debugf3("MC: " __FILE__ ": %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 = BS_MOD_STR;
mci->mod_ver = "$Revision: 1.5.2.11 $";
mci->pdev = pdev;
debugf3("MC: " __FILE__ ": %s(): init pvt\n", __func__);
pvt = (struct e752x_pvt *) mci->pvt_info;
pvt->dev_info = &e752x_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 == NULL)
pvt->bridge_ck = pci_scan_single_device(pdev->bus,
PCI_DEVFN(0, 1));
if (pvt->bridge_ck == NULL) {
printk(KERN_ERR "MC: error reporting device not found:"
"vendor %x device 0x%x (broken BIOS?)\n",
PCI_VENDOR_ID_INTEL, e752x_devs[dev_idx].err_dev);
goto fail;
}
pvt->mc_symmetric = ((ddrcsr & 0x10) != 0);
debugf3("MC: " __FILE__ ": %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;
/* find out the device types */
pci_read_config_dword(pdev, E752X_DRA, &dra);
/*
* 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++) {
u8 value;
u32 cumul_size;
/* mem_dev 0=x8, 1=x4 */
int mem_dev = (dra >> (index * 4 + 2)) & 0x3;
struct csrow_info *csrow = &mci->csrows[index];
mem_dev = (mem_dev == 2);
pci_read_config_byte(mci->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("MC: " __FILE__ ": %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;
}
/* Fill in the memory map table */
{
u8 value;
u8 last = 0;
u8 row = 0;
for (index = 0; index < 8; index += 2) {
pci_read_config_byte(mci->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(mci->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(mci->pdev, E752X_DRM, &stat8);
pvt->map_type = ((stat8 & 0x0f) > ((stat8 >> 4) & 0x0f));
mci->edac_cap |= EDAC_FLAG_NONE;
debugf3("MC: " __FILE__ ": %s(): tolm, remapbase, remaplimit\n",
__func__);
/* load the top of low memory, remap base, and remap limit vars */
pci_read_config_word(mci->pdev, E752X_TOLM, &pci_data);
pvt->tolm = ((u32) pci_data) << 4;
pci_read_config_word(mci->pdev, E752X_REMAPBASE, &pci_data);
pvt->remapbase = ((u32) pci_data) << 14;
pci_read_config_word(mci->pdev, E752X_REMAPLIMIT, &pci_data);
pvt->remaplimit = ((u32) pci_data) << 14;
printk("tolm = %x, remapbase = %x, remaplimit = %x\n", pvt->tolm,
pvt->remapbase, pvt->remaplimit);
if (edac_mc_add_mc(mci)) {
debugf3("MC: " __FILE__
": %s(): failed edac_mc_add_mc()\n",
__func__);
goto fail;
}
/* Walk through the PCI table and clear errors */
switch (dev_idx) {
case E7520:
dev = pci_get_device(PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_7520_0, NULL);
break;
case E7525:
dev = pci_get_device(PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_7525_0, NULL);
break;
case E7320:
dev = pci_get_device(PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_7320_0, NULL);
break;
}
pvt->dev_d0f0 = dev;
for (pres_dev = dev;
((struct pci_dev *) pres_dev->global_list.next != dev);
pres_dev = (struct pci_dev *) pres_dev->global_list.next) {
pci_read_config_dword(pres_dev, PCI_COMMAND, &stat32);
stat = (u16) (stat32 >> 16);
/* clear any error bits */
if (stat32 & ((1 << 6) + (1 << 8)))
pci_write_config_word(pres_dev, PCI_STATUS, stat);
}
/* find the error reporting device and clear errors */
dev = pvt->dev_d0f1 = pci_dev_get(pvt->bridge_ck);
/* 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);
/* clear other MCH errors */
pci_read_config_dword(dev, E752X_FERR_GLOBAL, &stat32);
pci_write_config_dword(dev, E752X_FERR_GLOBAL, stat32);
pci_read_config_dword(dev, E752X_NERR_GLOBAL, &stat32);
pci_write_config_dword(dev, E752X_NERR_GLOBAL, stat32);
pci_read_config_byte(dev, E752X_HI_FERR, &stat8);
pci_write_config_byte(dev, E752X_HI_FERR, stat8);
pci_read_config_byte(dev, E752X_HI_NERR, &stat8);
pci_write_config_byte(dev, E752X_HI_NERR, stat8);
pci_read_config_dword(dev, E752X_SYSBUS_FERR, &stat32);
pci_write_config_dword(dev, E752X_SYSBUS_FERR, stat32);
pci_read_config_byte(dev, E752X_BUF_FERR, &stat8);
pci_write_config_byte(dev, E752X_BUF_FERR, stat8);
pci_read_config_byte(dev, E752X_BUF_NERR, &stat8);
pci_write_config_byte(dev, E752X_BUF_NERR, stat8);
pci_read_config_word(dev, E752X_DRAM_FERR, &stat16);
pci_write_config_word(dev, E752X_DRAM_FERR, stat16);
pci_read_config_word(dev, E752X_DRAM_NERR, &stat16);
pci_write_config_word(dev, E752X_DRAM_NERR, stat16);
/* get this far and it's successful */
debugf3("MC: " __FILE__ ": %s(): success\n", __func__);
return 0;
fail:
if (mci) {
if (pvt->dev_d0f0)
pci_dev_put(pvt->dev_d0f0);
if (pvt->dev_d0f1)
pci_dev_put(pvt->dev_d0f1);
if (pvt->bridge_ck)
pci_dev_put(pvt->bridge_ck);
edac_mc_free(mci);
}
return rc;
}
/* returns count (>= 0), or negative on error */
static int __devinit e752x_init_one(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
debugf0("MC: " __FILE__ ": %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(__FILE__ ": %s()\n", __func__);
if ((mci = edac_mc_find_mci_by_pdev(pdev)) == NULL)
return;
if (edac_mc_del_mc(mci))
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: BS_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("MC: " __FILE__ ": %s()\n", __func__);
pci_rc = pci_register_driver(&e752x_driver);
return (pci_rc < 0) ? pci_rc : 0;
}
static void __exit e752x_exit(void)
{
debugf3("MC: " __FILE__ ": %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");
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