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linux/drivers/edac/i7300_edac.c
Mauro Carvalho Chehab c3af2eaf7a i7300_edac: add global error registers 
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-08-30 14:56:44 -03:00

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/*
* Intel 7300 class Memory Controllers kernel module (Clarksboro)
*
* This file may be distributed under the terms of the
* GNU General Public License version 2 only.
*
* Copyright (c) 2010 by:
* Mauro Carvalho Chehab <mchehab@redhat.com>
*
* Red Hat Inc. http://www.redhat.com
*
* Intel 7300 Chipset Memory Controller Hub (MCH) - Datasheet
* http://www.intel.com/Assets/PDF/datasheet/318082.pdf
*
* TODO: The chipset allow checking for PCI Express errors also. Currently,
* the driver covers only memory error errors
*
* This driver uses "csrows" EDAC attribute to represent DIMM slot#
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/pci_ids.h>
#include <linux/slab.h>
#include <linux/edac.h>
#include <linux/mmzone.h>
#include "edac_core.h"
/*
* Alter this version for the I7300 module when modifications are made
*/
#define I7300_REVISION " Ver: 1.0.0 " __DATE__
#define EDAC_MOD_STR "i7300_edac"
#define i7300_printk(level, fmt, arg...) \
edac_printk(level, "i7300", fmt, ##arg)
#define i7300_mc_printk(mci, level, fmt, arg...) \
edac_mc_chipset_printk(mci, level, "i7300", fmt, ##arg)
/*
* Memory topology is organized as:
* Branch 0 - 2 channels: channels 0 and 1 (FDB0 PCI dev 21.0)
* Branch 1 - 2 channels: channels 2 and 3 (FDB1 PCI dev 22.0)
* Each channel can have to 8 DIMM sets (called as SLOTS)
* Slots should generally be filled in pairs
* Except on Single Channel mode of operation
* just slot 0/channel0 filled on this mode
* On normal operation mode, the two channels on a branch should be
* filled together for the same SLOT#
* When in mirrored mode, Branch 1 replicate memory at Branch 0, so, the four
* channels on both branches should be filled
*/
/* Limits for i7300 */
#define MAX_SLOTS 8
#define MAX_BRANCHES 2
#define MAX_CH_PER_BRANCH 2
#define MAX_CHANNELS (MAX_CH_PER_BRANCH * MAX_BRANCHES)
#define MAX_MIR 3
#define to_channel(ch, branch) ((((branch)) << 1) | (ch))
#define to_csrow(slot, ch, branch) \
(to_channel(ch, branch) | ((slot) << 2))
/*
* I7300 devices
* All 3 functions of Device 16 (0,1,2) share the SAME DID and
* uses PCI_DEVICE_ID_INTEL_I7300_MCH_ERR for device 16 (0,1,2),
* PCI_DEVICE_ID_INTEL_I7300_MCH_FB0 and PCI_DEVICE_ID_INTEL_I7300_MCH_FB1
* for device 21 (0,1).
*/
/****************************************************
* i7300 Register definitions for memory enumberation
****************************************************/
/*
* Device 16,
* Function 0: System Address (not documented)
* Function 1: Memory Branch Map, Control, Errors Register
*/
/* OFFSETS for Function 0 */
#define AMBASE 0x48 /* AMB Mem Mapped Reg Region Base */
#define MAXCH 0x56 /* Max Channel Number */
#define MAXDIMMPERCH 0x57 /* Max DIMM PER Channel Number */
/* OFFSETS for Function 1 */
#define MC_SETTINGS 0x40
#define TOLM 0x6C
#define REDMEMB 0x7C
#define MIR0 0x80
#define MIR1 0x84
#define MIR2 0x88
/*
* Note: Other Intel EDAC drivers use AMBPRESENT to identify if the available
* memory. From datasheet item 7.3.1 (FB-DIMM technology & organization), it
* seems that we cannot use this information directly for the same usage.
* Each memory slot may have up to 2 AMB interfaces, one for income and another
* for outcome interface to the next slot.
* For now, the driver just stores the AMB present registers, but rely only at
* the MTR info to detect memory.
* Datasheet is also not clear about how to map each AMBPRESENT registers to
* one of the 4 available channels.
*/
#define AMBPRESENT_0 0x64
#define AMBPRESENT_1 0x66
const static u16 mtr_regs [MAX_SLOTS] = {
0x80, 0x84, 0x88, 0x8c,
0x82, 0x86, 0x8a, 0x8e
};
/* Defines to extract the vaious fields from the
* MTRx - Memory Technology Registers
*/
#define MTR_DIMMS_PRESENT(mtr) ((mtr) & (1 << 8))
#define MTR_DIMMS_ETHROTTLE(mtr) ((mtr) & (1 << 7))
#define MTR_DRAM_WIDTH(mtr) (((mtr) & (1 << 6)) ? 8 : 4)
#define MTR_DRAM_BANKS(mtr) (((mtr) & (1 << 5)) ? 8 : 4)
#define MTR_DIMM_RANKS(mtr) (((mtr) & (1 << 4)) ? 1 : 0)
#define MTR_DIMM_ROWS(mtr) (((mtr) >> 2) & 0x3)
#define MTR_DRAM_BANKS_ADDR_BITS 2
#define MTR_DIMM_ROWS_ADDR_BITS(mtr) (MTR_DIMM_ROWS(mtr) + 13)
#define MTR_DIMM_COLS(mtr) ((mtr) & 0x3)
#define MTR_DIMM_COLS_ADDR_BITS(mtr) (MTR_DIMM_COLS(mtr) + 10)
#ifdef CONFIG_EDAC_DEBUG
/* MTR NUMROW */
static const char *numrow_toString[] = {
"8,192 - 13 rows",
"16,384 - 14 rows",
"32,768 - 15 rows",
"65,536 - 16 rows"
};
/* MTR NUMCOL */
static const char *numcol_toString[] = {
"1,024 - 10 columns",
"2,048 - 11 columns",
"4,096 - 12 columns",
"reserved"
};
#endif
/************************************************
* i7300 Register definitions for error detection
************************************************/
/*
* Device 16.2: Global Error Registers
*/
#define FERR_GLOBAL_LO 0x40
static const char *ferr_global_name[] = {
[31] = "Internal MCH Fatal Error",
[30] = "Intel QuickData Technology Device Fatal Error",
[29] = "FSB1 Fatal Error",
[28] = "FSB0 Fatal Error",
[27] = "FBD Channel 3 Fatal Error",
[26] = "FBD Channel 2 Fatal Error",
[25] = "FBD Channel 1 Fatal Error",
[24] = "FBD Channel 0 Fatal Error",
[23] = "PCI Express Device 7Fatal Error",
[22] = "PCI Express Device 6 Fatal Error",
[21] = "PCI Express Device 5 Fatal Error",
[20] = "PCI Express Device 4 Fatal Error",
[19] = "PCI Express Device 3 Fatal Error",
[18] = "PCI Express Device 2 Fatal Error",
[17] = "PCI Express Device 1 Fatal Error",
[16] = "ESI Fatal Error",
[15] = "Internal MCH Non-Fatal Error",
[14] = "Intel QuickData Technology Device Non Fatal Error",
[13] = "FSB1 Non-Fatal Error",
[12] = "FSB 0 Non-Fatal Error",
[11] = "FBD Channel 3 Non-Fatal Error",
[10] = "FBD Channel 2 Non-Fatal Error",
[9] = "FBD Channel 1 Non-Fatal Error",
[8] = "FBD Channel 0 Non-Fatal Error",
[7] = "PCI Express Device 7 Non-Fatal Error",
[6] = "PCI Express Device 6 Non-Fatal Error",
[5] = "PCI Express Device 5 Non-Fatal Error",
[4] = "PCI Express Device 4 Non-Fatal Error",
[3] = "PCI Express Device 3 Non-Fatal Error",
[2] = "PCI Express Device 2 Non-Fatal Error",
[1] = "PCI Express Device 1 Non-Fatal Error",
[0] = "ESI Non-Fatal Error",
};
#define NERR_GLOBAL 0x44
static const char *nerr_global_name[] = {
[31] = "Internal MCH Fatal Error",
[30] = "Intel QuickData Technology Device Fatal Error",
[29] = "FSB1 Fatal Error",
[28] = "FSB0 Fatal Error",
[27] = "FSB2 Fatal Error",
[26] = "FSB3 Fatal Error",
[25] = "Reserved",
[24] = "FBD Channel 0,1,2 or 3 Fatal Error",
[23] = "PCI Express Device 7 Fatal Error",
[22] = "PCI Express Device 6 Fatal Error",
[21] = "PCI Express Device 5 Fatal Error",
[20] = "PCI Express Device 4 Fatal Error",
[19] = "PCI Express Device 3 Fatal Error",
[18] = "PCI Express Device 2 Fatal Error",
[17] = "PCI Express Device 1 Fatal Error",
[16] = "ESI Fatal Error",
[15] = "Internal MCH Non-Fatal Error",
[14] = "Intel QuickData Technology Device Non Fatal Error",
[13] = "FSB1 Non-Fatal Error",
[12] = "FSB0 Non-Fatal Error",
[11] = "FSB2 Non-Fatal Error",
[10] = "FSB3 Non-Fatal Error",
[9] = "Reserved",
[8] = "FBD Channel 0,1, 2 or 3 Non-Fatal Error",
[7] = "PCI Express Device 7 Non-Fatal Error",
[6] = "PCI Express Device 6 Non-Fatal Error",
[5] = "PCI Express Device 5 Non-Fatal Error",
[4] = "PCI Express Device 4 Non-Fatal Error",
[3] = "PCI Express Device 3 Non-Fatal Error",
[2] = "PCI Express Device 2 Non-Fatal Error",
[1] = "PCI Express Device 1 Non-Fatal Error",
[0] = "ESI Non-Fatal Error",
};
#if 0
/*
* Error indicator bits and masks
* Error masks are according with Table 5-17 of i7300 datasheet
*/
enum error_mask {
EMASK_M1 = 1<<0, /* Memory Write error on non-redundant retry */
EMASK_M2 = 1<<1, /* Memory or FB-DIMM configuration CRC read error */
EMASK_M3 = 1<<2, /* Reserved */
EMASK_M4 = 1<<3, /* Uncorrectable Data ECC on Replay */
EMASK_M5 = 1<<4, /* Aliased Uncorrectable Non-Mirrored Demand Data ECC */
EMASK_M6 = 1<<5, /* Unsupported on i7300 */
EMASK_M7 = 1<<6, /* Aliased Uncorrectable Resilver- or Spare-Copy Data ECC */
EMASK_M8 = 1<<7, /* Aliased Uncorrectable Patrol Data ECC */
EMASK_M9 = 1<<8, /* Non-Aliased Uncorrectable Non-Mirrored Demand Data ECC */
EMASK_M10 = 1<<9, /* Unsupported on i7300 */
EMASK_M11 = 1<<10, /* Non-Aliased Uncorrectable Resilver- or Spare-Copy Data ECC */
EMASK_M12 = 1<<11, /* Non-Aliased Uncorrectable Patrol Data ECC */
EMASK_M13 = 1<<12, /* Memory Write error on first attempt */
EMASK_M14 = 1<<13, /* FB-DIMM Configuration Write error on first attempt */
EMASK_M15 = 1<<14, /* Memory or FB-DIMM configuration CRC read error */
EMASK_M16 = 1<<15, /* Channel Failed-Over Occurred */
EMASK_M17 = 1<<16, /* Correctable Non-Mirrored Demand Data ECC */
EMASK_M18 = 1<<17, /* Unsupported on i7300 */
EMASK_M19 = 1<<18, /* Correctable Resilver- or Spare-Copy Data ECC */
EMASK_M20 = 1<<19, /* Correctable Patrol Data ECC */
EMASK_M21 = 1<<20, /* FB-DIMM Northbound parity error on FB-DIMM Sync Status */
EMASK_M22 = 1<<21, /* SPD protocol Error */
EMASK_M23 = 1<<22, /* Non-Redundant Fast Reset Timeout */
EMASK_M24 = 1<<23, /* Refresh error */
EMASK_M25 = 1<<24, /* Memory Write error on redundant retry */
EMASK_M26 = 1<<25, /* Redundant Fast Reset Timeout */
EMASK_M27 = 1<<26, /* Correctable Counter Threshold Exceeded */
EMASK_M28 = 1<<27, /* DIMM-Spare Copy Completed */
EMASK_M29 = 1<<28, /* DIMM-Isolation Completed */
};
/*
* Names to translate bit error into something useful
*/
static const char *error_name[] = {
[0] = "Memory Write error on non-redundant retry",
[1] = "Memory or FB-DIMM configuration CRC read error",
/* Reserved */
[3] = "Uncorrectable Data ECC on Replay",
[4] = "Aliased Uncorrectable Non-Mirrored Demand Data ECC",
/* M6 Unsupported on i7300 */
[6] = "Aliased Uncorrectable Resilver- or Spare-Copy Data ECC",
[7] = "Aliased Uncorrectable Patrol Data ECC",
[8] = "Non-Aliased Uncorrectable Non-Mirrored Demand Data ECC",
/* M10 Unsupported on i7300 */
[10] = "Non-Aliased Uncorrectable Resilver- or Spare-Copy Data ECC",
[11] = "Non-Aliased Uncorrectable Patrol Data ECC",
[12] = "Memory Write error on first attempt",
[13] = "FB-DIMM Configuration Write error on first attempt",
[14] = "Memory or FB-DIMM configuration CRC read error",
[15] = "Channel Failed-Over Occurred",
[16] = "Correctable Non-Mirrored Demand Data ECC",
/* M18 Unsupported on i7300 */
[18] = "Correctable Resilver- or Spare-Copy Data ECC",
[19] = "Correctable Patrol Data ECC",
[20] = "FB-DIMM Northbound parity error on FB-DIMM Sync Status",
[21] = "SPD protocol Error",
[22] = "Non-Redundant Fast Reset Timeout",
[23] = "Refresh error",
[24] = "Memory Write error on redundant retry",
[25] = "Redundant Fast Reset Timeout",
[26] = "Correctable Counter Threshold Exceeded",
[27] = "DIMM-Spare Copy Completed",
[28] = "DIMM-Isolation Completed",
};
/* Fatal errors */
#define ERROR_FAT_MASK (EMASK_M1 | \
EMASK_M2 | \
EMASK_M23)
/* Correctable errors */
#define ERROR_NF_CORRECTABLE (EMASK_M27 | \
EMASK_M20 | \
EMASK_M19 | \
EMASK_M18 | \
EMASK_M17 | \
EMASK_M16)
#define ERROR_NF_DIMM_SPARE (EMASK_M29 | \
EMASK_M28)
#define ERROR_NF_SPD_PROTOCOL (EMASK_M22)
#define ERROR_NF_NORTH_CRC (EMASK_M21)
/* Recoverable errors */
#define ERROR_NF_RECOVERABLE (EMASK_M26 | \
EMASK_M25 | \
EMASK_M24 | \
EMASK_M15 | \
EMASK_M14 | \
EMASK_M13 | \
EMASK_M12 | \
EMASK_M11 | \
EMASK_M9 | \
EMASK_M8 | \
EMASK_M7 | \
EMASK_M5)
/* uncorrectable errors */
#define ERROR_NF_UNCORRECTABLE (EMASK_M4)
/* mask to all non-fatal errors */
#define ERROR_NF_MASK (ERROR_NF_CORRECTABLE | \
ERROR_NF_UNCORRECTABLE | \
ERROR_NF_RECOVERABLE | \
ERROR_NF_DIMM_SPARE | \
ERROR_NF_SPD_PROTOCOL | \
ERROR_NF_NORTH_CRC)
/*
* Define error masks for the several registers
*/
/* Enable all fatal and non fatal errors */
#define ENABLE_EMASK_ALL (ERROR_FAT_MASK | ERROR_NF_MASK)
/* mask for fatal error registers */
#define FERR_FAT_MASK ERROR_FAT_MASK
/* masks for non-fatal error register */
static inline int to_nf_mask(unsigned int mask)
{
return (mask & EMASK_M29) | (mask >> 3);
};
static inline int from_nf_ferr(unsigned int mask)
{
return (mask & EMASK_M29) | /* Bit 28 */
(mask & ((1 << 28) - 1) << 3); /* Bits 0 to 27 */
};
#define FERR_NF_MASK to_nf_mask(ERROR_NF_MASK)
#define FERR_NF_CORRECTABLE to_nf_mask(ERROR_NF_CORRECTABLE)
#define FERR_NF_DIMM_SPARE to_nf_mask(ERROR_NF_DIMM_SPARE)
#define FERR_NF_SPD_PROTOCOL to_nf_mask(ERROR_NF_SPD_PROTOCOL)
#define FERR_NF_NORTH_CRC to_nf_mask(ERROR_NF_NORTH_CRC)
#define FERR_NF_RECOVERABLE to_nf_mask(ERROR_NF_RECOVERABLE)
#define FERR_NF_UNCORRECTABLE to_nf_mask(ERROR_NF_UNCORRECTABLE)
#endif
/* Device name and register DID (Device ID) */
struct i7300_dev_info {
const char *ctl_name; /* name for this device */
u16 fsb_mapping_errors; /* DID for the branchmap,control */
};
/* Table of devices attributes supported by this driver */
static const struct i7300_dev_info i7300_devs[] = {
{
.ctl_name = "I7300",
.fsb_mapping_errors = PCI_DEVICE_ID_INTEL_I7300_MCH_ERR,
},
};
struct i7300_dimm_info {
int megabytes; /* size, 0 means not present */
};
/* driver private data structure */
struct i7300_pvt {
struct pci_dev *system_address; /* 16.0 */
struct pci_dev *branchmap_werrors; /* 16.1 */
struct pci_dev *fsb_error_regs; /* 16.2 */
struct pci_dev *branch_pci[MAX_BRANCHES]; /* 21.0 and 22.0 */
u16 tolm; /* top of low memory */
u64 ambase; /* AMB BAR */
u32 mc_settings;
u16 mir[MAX_MIR];
u16 mtr[MAX_SLOTS][MAX_BRANCHES]; /* Memory Technlogy Reg */
u16 ambpresent[MAX_CHANNELS]; /* AMB present regs */
/* DIMM information matrix, allocating architecture maximums */
struct i7300_dimm_info dimm_info[MAX_SLOTS][MAX_CHANNELS];
};
#if 0
/* I7300 MCH error information retrieved from Hardware */
struct i7300_error_info {
/* These registers are always read from the MC */
u32 ferr_fat_fbd; /* First Errors Fatal */
u32 nerr_fat_fbd; /* Next Errors Fatal */
u32 ferr_nf_fbd; /* First Errors Non-Fatal */
u32 nerr_nf_fbd; /* Next Errors Non-Fatal */
/* These registers are input ONLY if there was a Recoverable Error */
u32 redmemb; /* Recoverable Mem Data Error log B */
u16 recmema; /* Recoverable Mem Error log A */
u32 recmemb; /* Recoverable Mem Error log B */
/* These registers are input ONLY if there was a Non-Rec Error */
u16 nrecmema; /* Non-Recoverable Mem log A */
u16 nrecmemb; /* Non-Recoverable Mem log B */
};
#endif
/* FIXME: Why do we need to have this static? */
static struct edac_pci_ctl_info *i7300_pci;
#if 0
/* note that nrec_rdwr changed from NRECMEMA to NRECMEMB between the 5000 and
5400 better to use an inline function than a macro in this case */
static inline int nrec_bank(struct i7300_error_info *info)
{
return ((info->nrecmema) >> 12) & 0x7;
}
static inline int nrec_rank(struct i7300_error_info *info)
{
return ((info->nrecmema) >> 8) & 0xf;
}
static inline int nrec_buf_id(struct i7300_error_info *info)
{
return ((info->nrecmema)) & 0xff;
}
static inline int nrec_rdwr(struct i7300_error_info *info)
{
return (info->nrecmemb) >> 31;
}
/* This applies to both NREC and REC string so it can be used with nrec_rdwr
and rec_rdwr */
static inline const char *rdwr_str(int rdwr)
{
return rdwr ? "Write" : "Read";
}
static inline int nrec_cas(struct i7300_error_info *info)
{
return ((info->nrecmemb) >> 16) & 0x1fff;
}
static inline int nrec_ras(struct i7300_error_info *info)
{
return (info->nrecmemb) & 0xffff;
}
static inline int rec_bank(struct i7300_error_info *info)
{
return ((info->recmema) >> 12) & 0x7;
}
static inline int rec_rank(struct i7300_error_info *info)
{
return ((info->recmema) >> 8) & 0xf;
}
static inline int rec_rdwr(struct i7300_error_info *info)
{
return (info->recmemb) >> 31;
}
static inline int rec_cas(struct i7300_error_info *info)
{
return ((info->recmemb) >> 16) & 0x1fff;
}
static inline int rec_ras(struct i7300_error_info *info)
{
return (info->recmemb) & 0xffff;
}
/*
* i7300_get_error_info Retrieve the hardware error information from
* the hardware and cache it in the 'info'
* structure
*/
static void i7300_get_error_info(struct mem_ctl_info *mci,
struct i7300_error_info *info)
{
struct i7300_pvt *pvt;
u32 value;
pvt = mci->pvt_info;
/* read in the 1st FATAL error register */
pci_read_config_dword(pvt->branchmap_werrors, FERR_FAT_FBD, &value);
/* Mask only the bits that the doc says are valid
*/
value &= (FERR_FAT_FBDCHAN | FERR_FAT_MASK);
/* If there is an error, then read in the
NEXT FATAL error register and the Memory Error Log Register A
*/
if (value & FERR_FAT_MASK) {
info->ferr_fat_fbd = value;
/* harvest the various error data we need */
pci_read_config_dword(pvt->branchmap_werrors,
NERR_FAT_FBD, &info->nerr_fat_fbd);
pci_read_config_word(pvt->branchmap_werrors,
NRECMEMA, &info->nrecmema);
pci_read_config_word(pvt->branchmap_werrors,
NRECMEMB, &info->nrecmemb);
/* Clear the error bits, by writing them back */
pci_write_config_dword(pvt->branchmap_werrors,
FERR_FAT_FBD, value);
} else {
info->ferr_fat_fbd = 0;
info->nerr_fat_fbd = 0;
info->nrecmema = 0;
info->nrecmemb = 0;
}
/* read in the 1st NON-FATAL error register */
pci_read_config_dword(pvt->branchmap_werrors, FERR_NF_FBD, &value);
/* If there is an error, then read in the 1st NON-FATAL error
* register as well */
if (value & FERR_NF_MASK) {
info->ferr_nf_fbd = value;
/* harvest the various error data we need */
pci_read_config_dword(pvt->branchmap_werrors,
NERR_NF_FBD, &info->nerr_nf_fbd);
pci_read_config_word(pvt->branchmap_werrors,
RECMEMA, &info->recmema);
pci_read_config_dword(pvt->branchmap_werrors,
RECMEMB, &info->recmemb);
pci_read_config_dword(pvt->branchmap_werrors,
REDMEMB, &info->redmemb);
/* Clear the error bits, by writing them back */
pci_write_config_dword(pvt->branchmap_werrors,
FERR_NF_FBD, value);
} else {
info->ferr_nf_fbd = 0;
info->nerr_nf_fbd = 0;
info->recmema = 0;
info->recmemb = 0;
info->redmemb = 0;
}
}
/*
* i7300_proccess_non_recoverable_info(struct mem_ctl_info *mci,
* struct i7300_error_info *info,
* int handle_errors);
*
* handle the Intel FATAL and unrecoverable errors, if any
*/
static void i7300_proccess_non_recoverable_info(struct mem_ctl_info *mci,
struct i7300_error_info *info,
unsigned long allErrors)
{
char msg[EDAC_MC_LABEL_LEN + 1 + 90 + 80];
int branch;
int channel;
int bank;
int buf_id;
int rank;
int rdwr;
int ras, cas;
int errnum;
char *type = NULL;
if (!allErrors)
return; /* if no error, return now */
if (allErrors & ERROR_FAT_MASK)
type = "FATAL";
else if (allErrors & FERR_NF_UNCORRECTABLE)
type = "NON-FATAL uncorrected";
else
type = "NON-FATAL recoverable";
/* ONLY ONE of the possible error bits will be set, as per the docs */
branch = extract_fbdchan_indx(info->ferr_fat_fbd);
channel = branch;
/* Use the NON-Recoverable macros to extract data */
bank = nrec_bank(info);
rank = nrec_rank(info);
buf_id = nrec_buf_id(info);
rdwr = nrec_rdwr(info);
ras = nrec_ras(info);
cas = nrec_cas(info);
debugf0("\t\tCSROW= %d Channels= %d,%d (Branch= %d "
"DRAM Bank= %d Buffer ID = %d rdwr= %s ras= %d cas= %d)\n",
rank, channel, channel + 1, branch >> 1, bank,
buf_id, rdwr_str(rdwr), ras, cas);
/* Only 1 bit will be on */
errnum = find_first_bit(&allErrors, ARRAY_SIZE(error_name));
/* Form out message */
snprintf(msg, sizeof(msg),
"%s (Branch=%d DRAM-Bank=%d Buffer ID = %d RDWR=%s "
"RAS=%d CAS=%d %s Err=0x%lx (%s))",
type, branch >> 1, bank, buf_id, rdwr_str(rdwr), ras, cas,
type, allErrors, error_name[errnum]);
/* Call the helper to output message */
edac_mc_handle_fbd_ue(mci, rank, channel, channel + 1, msg);
}
/*
* i7300_process_fatal_error_info(struct mem_ctl_info *mci,
* struct i7300_error_info *info,
* int handle_errors);
*
* handle the Intel NON-FATAL errors, if any
*/
static void i7300_process_nonfatal_error_info(struct mem_ctl_info *mci,
struct i7300_error_info *info)
{
char msg[EDAC_MC_LABEL_LEN + 1 + 90 + 80];
unsigned long allErrors;
int branch;
int channel;
int bank;
int rank;
int rdwr;
int ras, cas;
int errnum;
/* mask off the Error bits that are possible */
allErrors = from_nf_ferr(info->ferr_nf_fbd & FERR_NF_MASK);
if (!allErrors)
return; /* if no error, return now */
/* ONLY ONE of the possible error bits will be set, as per the docs */
if (allErrors & (ERROR_NF_UNCORRECTABLE | ERROR_NF_RECOVERABLE)) {
i7300_proccess_non_recoverable_info(mci, info, allErrors);
return;
}
/* Correctable errors */
if (allErrors & ERROR_NF_CORRECTABLE) {
debugf0("\tCorrected bits= 0x%lx\n", allErrors);
branch = extract_fbdchan_indx(info->ferr_nf_fbd);
channel = 0;
if (REC_ECC_LOCATOR_ODD(info->redmemb))
channel = 1;
/* Convert channel to be based from zero, instead of
* from branch base of 0 */
channel += branch;
bank = rec_bank(info);
rank = rec_rank(info);
rdwr = rec_rdwr(info);
ras = rec_ras(info);
cas = rec_cas(info);
/* Only 1 bit will be on */
errnum = find_first_bit(&allErrors, ARRAY_SIZE(error_name));
debugf0("\t\tCSROW= %d Channel= %d (Branch %d "
"DRAM Bank= %d rdwr= %s ras= %d cas= %d)\n",
rank, channel, branch >> 1, bank,
rdwr_str(rdwr), ras, cas);
/* Form out message */
snprintf(msg, sizeof(msg),
"Corrected error (Branch=%d DRAM-Bank=%d RDWR=%s "
"RAS=%d CAS=%d, CE Err=0x%lx (%s))",
branch >> 1, bank, rdwr_str(rdwr), ras, cas,
allErrors, error_name[errnum]);
/* Call the helper to output message */
edac_mc_handle_fbd_ce(mci, rank, channel, msg);
return;
}
/* Miscelaneous errors */
errnum = find_first_bit(&allErrors, ARRAY_SIZE(error_name));
branch = extract_fbdchan_indx(info->ferr_nf_fbd);
i7300_mc_printk(mci, KERN_EMERG,
"Non-Fatal misc error (Branch=%d Err=%#lx (%s))",
branch >> 1, allErrors, error_name[errnum]);
}
/*
* i7300_process_error_info Process the error info that is
* in the 'info' structure, previously retrieved from hardware
*/
static void i7300_process_error_info(struct mem_ctl_info *mci,
struct i7300_error_info *info)
{ u32 allErrors;
/* First handle any fatal errors that occurred */
allErrors = (info->ferr_fat_fbd & FERR_FAT_MASK);
i7300_proccess_non_recoverable_info(mci, info, allErrors);
/* now handle any non-fatal errors that occurred */
i7300_process_nonfatal_error_info(mci, info);
}
/*
* i7300_clear_error Retrieve any error from the hardware
* but do NOT process that error.
* Used for 'clearing' out of previous errors
* Called by the Core module.
*/
static void i7300_clear_error(struct mem_ctl_info *mci)
{
struct i7300_error_info info;
i7300_get_error_info(mci, &info);
}
/*
* i7300_check_error Retrieve and process errors reported by the
* hardware. Called by the Core module.
*/
static void i7300_check_error(struct mem_ctl_info *mci)
{
struct i7300_error_info info;
debugf4("MC%d: " __FILE__ ": %s()\n", mci->mc_idx, __func__);
i7300_get_error_info(mci, &info);
i7300_process_error_info(mci, &info);
}
/*
* i7300_enable_error_reporting
* Turn on the memory reporting features of the hardware
*/
static void i7300_enable_error_reporting(struct mem_ctl_info *mci)
{
struct i7300_pvt *pvt;
u32 fbd_error_mask;
pvt = mci->pvt_info;
/* Read the FBD Error Mask Register */
pci_read_config_dword(pvt->branchmap_werrors, EMASK_FBD,
&fbd_error_mask);
/* Enable with a '0' */
fbd_error_mask &= ~(ENABLE_EMASK_ALL);
pci_write_config_dword(pvt->branchmap_werrors, EMASK_FBD,
fbd_error_mask);
}
#endif
/*
* determine_mtr(pvt, csrow, channel)
*
* return the proper MTR register as determine by the csrow and desired channel
*/
static int decode_mtr(struct i7300_pvt *pvt,
int slot, int ch, int branch,
struct i7300_dimm_info *dinfo,
struct csrow_info *p_csrow)
{
int mtr, ans, addrBits, channel;
channel = to_channel(ch, branch);
mtr = pvt->mtr[slot][branch];
ans = MTR_DIMMS_PRESENT(mtr) ? 1 : 0;
debugf2("\tMTR%d CH%d: DIMMs are %s (mtr)\n",
slot, channel,
ans ? "Present" : "NOT Present");
/* Determine if there is a DIMM present in this DIMM slot */
#if 0
if (!amb_present || !ans)
return 0;
#else
if (!ans)
return 0;
#endif
/* Start with the number of bits for a Bank
* on the DRAM */
addrBits = MTR_DRAM_BANKS_ADDR_BITS;
/* Add thenumber of ROW bits */
addrBits += MTR_DIMM_ROWS_ADDR_BITS(mtr);
/* add the number of COLUMN bits */
addrBits += MTR_DIMM_COLS_ADDR_BITS(mtr);
/* add the number of RANK bits */
addrBits += MTR_DIMM_RANKS(mtr);
addrBits += 6; /* add 64 bits per DIMM */
addrBits -= 20; /* divide by 2^^20 */
addrBits -= 3; /* 8 bits per bytes */
dinfo->megabytes = 1 << addrBits;
debugf2("\t\tWIDTH: x%d\n", MTR_DRAM_WIDTH(mtr));
debugf2("\t\tELECTRICAL THROTTLING is %s\n",
MTR_DIMMS_ETHROTTLE(mtr) ? "enabled" : "disabled");
debugf2("\t\tNUMBANK: %d bank(s)\n", MTR_DRAM_BANKS(mtr));
debugf2("\t\tNUMRANK: %s\n", MTR_DIMM_RANKS(mtr) ? "double" : "single");
debugf2("\t\tNUMROW: %s\n", numrow_toString[MTR_DIMM_ROWS(mtr)]);
debugf2("\t\tNUMCOL: %s\n", numcol_toString[MTR_DIMM_COLS(mtr)]);
debugf2("\t\tSIZE: %d MB\n", dinfo->megabytes);
p_csrow->grain = 8;
p_csrow->nr_pages = dinfo->megabytes << 8;
p_csrow->mtype = MEM_FB_DDR2;
p_csrow->edac_mode = EDAC_S8ECD8ED;
/* ask what device type on this row */
if (MTR_DRAM_WIDTH(mtr))
p_csrow->dtype = DEV_X8;
else
p_csrow->dtype = DEV_X4;
return mtr;
}
/*
* print_dimm_size
*
* also will output a DIMM matrix map, if debug is enabled, for viewing
* how the DIMMs are populated
*/
static void print_dimm_size(struct i7300_pvt *pvt)
{
struct i7300_dimm_info *dinfo;
char *p, *mem_buffer;
int space, n;
int channel, slot;
space = PAGE_SIZE;
mem_buffer = p = kmalloc(space, GFP_KERNEL);
if (p == NULL) {
i7300_printk(KERN_ERR, "MC: %s:%s() kmalloc() failed\n",
__FILE__, __func__);
return;
}
n = snprintf(p, space, " ");
p += n;
space -= n;
for (channel = 0; channel < MAX_CHANNELS; channel++) {
n = snprintf(p, space, "channel %d | ", channel);
p += n;
space -= n;
}
debugf2("%s\n", mem_buffer);
p = mem_buffer;
space = PAGE_SIZE;
n = snprintf(p, space, "-------------------------------"
"------------------------------");
p += n;
space -= n;
debugf2("%s\n", mem_buffer);
p = mem_buffer;
space = PAGE_SIZE;
for (slot = 0; slot < MAX_SLOTS; slot++) {
n = snprintf(p, space, "csrow/SLOT %d ", slot);
p += n;
space -= n;
for (channel = 0; channel < MAX_CHANNELS; channel++) {
dinfo = &pvt->dimm_info[slot][channel];
n = snprintf(p, space, "%4d MB | ", dinfo->megabytes);
p += n;
space -= n;
}
debugf2("%s\n", mem_buffer);
p = mem_buffer;
space = PAGE_SIZE;
}
n = snprintf(p, space, "-------------------------------"
"------------------------------");
p += n;
space -= n;
debugf2("%s\n", mem_buffer);
p = mem_buffer;
space = PAGE_SIZE;
kfree(mem_buffer);
}
/*
* i7300_init_csrows Initialize the 'csrows' table within
* the mci control structure with the
* addressing of memory.
*
* return:
* 0 success
* 1 no actual memory found on this MC
*/
static int i7300_init_csrows(struct mem_ctl_info *mci)
{
struct i7300_pvt *pvt;
struct i7300_dimm_info *dinfo;
struct csrow_info *p_csrow;
int empty;
int mtr;
int ch, branch, slot, channel;
pvt = mci->pvt_info;
empty = 1; /* Assume NO memory */
debugf2("Memory Technology Registers:\n");
/* Get the AMB present registers for the four channels */
for (branch = 0; branch < MAX_BRANCHES; branch++) {
/* Read and dump branch 0's MTRs */
channel = to_channel(0, branch);
pci_read_config_word(pvt->branch_pci[branch], AMBPRESENT_0,
&pvt->ambpresent[channel]);
debugf2("\t\tAMB-present CH%d = 0x%x:\n",
channel, pvt->ambpresent[channel]);
channel = to_channel(1, branch);
pci_read_config_word(pvt->branch_pci[branch], AMBPRESENT_1,
&pvt->ambpresent[channel]);
debugf2("\t\tAMB-present CH%d = 0x%x:\n",
channel, pvt->ambpresent[channel]);
}
/* Get the set of MTR[0-7] regs by each branch */
for (slot = 0; slot < MAX_SLOTS; slot++) {
int where = mtr_regs[slot];
for (branch = 0; branch < MAX_BRANCHES; branch++) {
pci_read_config_word(pvt->branch_pci[branch],
where,
&pvt->mtr[slot][branch]);
for (ch = 0; ch < MAX_BRANCHES; ch++) {
int channel = to_channel(ch, branch);
dinfo = &pvt->dimm_info[slot][channel];
p_csrow = &mci->csrows[slot];
mtr = decode_mtr(pvt, slot, ch, branch,
dinfo, p_csrow);
/* if no DIMMS on this row, continue */
if (!MTR_DIMMS_PRESENT(mtr))
continue;
p_csrow->csrow_idx = slot;
/* FAKE OUT VALUES, FIXME */
p_csrow->first_page = 0 + slot * 20;
p_csrow->last_page = 9 + slot * 20;
p_csrow->page_mask = 0xfff;
empty = 0;
}
}
}
return empty;
}
static void decode_mir(int mir_no, u16 mir[MAX_MIR])
{
if (mir[mir_no] & 3)
debugf2("MIR%d: limit= 0x%x Branch(es) that participate: %s %s\n",
mir_no,
(mir[mir_no] >> 4) & 0xfff,
(mir[mir_no] & 1) ? "B0" : "",
(mir[mir_no] & 2) ? "B1": "");
}
/*
* i7300_get_mc_regs read in the necessary registers and
* cache locally
*
* Fills in the private data members
*/
static int i7300_get_mc_regs(struct mem_ctl_info *mci)
{
struct i7300_pvt *pvt;
u32 actual_tolm;
int i, rc;
pvt = mci->pvt_info;
pci_read_config_dword(pvt->system_address, AMBASE,
(u32 *) &pvt->ambase);
debugf2("AMBASE= 0x%lx\n", (long unsigned int)pvt->ambase);
/* Get the Branch Map regs */
pci_read_config_word(pvt->branchmap_werrors, TOLM, &pvt->tolm);
pvt->tolm >>= 12;
debugf2("TOLM (number of 256M regions) =%u (0x%x)\n", pvt->tolm,
pvt->tolm);
actual_tolm = (u32) ((1000l * pvt->tolm) >> (30 - 28));
debugf2("Actual TOLM byte addr=%u.%03u GB (0x%x)\n",
actual_tolm/1000, actual_tolm % 1000, pvt->tolm << 28);
/* Get memory controller settings */
pci_read_config_dword(pvt->branchmap_werrors, MC_SETTINGS,
&pvt->mc_settings);
debugf0("Memory controller operating on %s mode\n",
pvt->mc_settings & (1 << 16)? "mirrored" : "non-mirrored");
debugf0("Error detection is %s\n",
pvt->mc_settings & (1 << 5)? "enabled" : "disabled");
/* Get Memory Interleave Range registers */
pci_read_config_word(pvt->branchmap_werrors, MIR0, &pvt->mir[0]);
pci_read_config_word(pvt->branchmap_werrors, MIR1, &pvt->mir[1]);
pci_read_config_word(pvt->branchmap_werrors, MIR2, &pvt->mir[2]);
/* Decode the MIR regs */
for (i = 0; i < MAX_MIR; i++)
decode_mir(i, pvt->mir);
rc = i7300_init_csrows(mci);
if (rc < 0)
return rc;
/* Go and determine the size of each DIMM and place in an
* orderly matrix */
print_dimm_size(pvt);
return 0;
}
/*
* i7300_put_devices 'put' all the devices that we have
* reserved via 'get'
*/
static void i7300_put_devices(struct mem_ctl_info *mci)
{
struct i7300_pvt *pvt;
int branch;
pvt = mci->pvt_info;
/* Decrement usage count for devices */
for (branch = 0; branch < MAX_CH_PER_BRANCH; branch++)
pci_dev_put(pvt->branch_pci[branch]);
pci_dev_put(pvt->fsb_error_regs);
pci_dev_put(pvt->branchmap_werrors);
}
/*
* i7300_get_devices Find and perform 'get' operation on the MCH's
* device/functions we want to reference for this driver
*
* Need to 'get' device 16 func 1 and func 2
*/
static int i7300_get_devices(struct mem_ctl_info *mci, int dev_idx)
{
struct i7300_pvt *pvt;
struct pci_dev *pdev;
pvt = mci->pvt_info;
/* Attempt to 'get' the MCH register we want */
pdev = NULL;
while (!pvt->branchmap_werrors || !pvt->fsb_error_regs) {
pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_I7300_MCH_ERR, pdev);
if (!pdev) {
/* End of list, leave */
i7300_printk(KERN_ERR,
"'system address,Process Bus' "
"device not found:"
"vendor 0x%x device 0x%x ERR funcs "
"(broken BIOS?)\n",
PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_I7300_MCH_ERR);
goto error;
}
/* Store device 16 funcs 1 and 2 */
switch (PCI_FUNC(pdev->devfn)) {
case 1:
pvt->branchmap_werrors = pdev;
break;
case 2:
pvt->fsb_error_regs = pdev;
break;
}
}
debugf1("System Address, processor bus- PCI Bus ID: %s %x:%x\n",
pci_name(pvt->system_address),
pvt->system_address->vendor, pvt->system_address->device);
debugf1("Branchmap, control and errors - PCI Bus ID: %s %x:%x\n",
pci_name(pvt->branchmap_werrors),
pvt->branchmap_werrors->vendor, pvt->branchmap_werrors->device);
debugf1("FSB Error Regs - PCI Bus ID: %s %x:%x\n",
pci_name(pvt->fsb_error_regs),
pvt->fsb_error_regs->vendor, pvt->fsb_error_regs->device);
pvt->branch_pci[0] = pci_get_device(PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_I7300_MCH_FB0,
NULL);
if (!pvt->branch_pci[0]) {
i7300_printk(KERN_ERR,
"MC: 'BRANCH 0' device not found:"
"vendor 0x%x device 0x%x Func 0 (broken BIOS?)\n",
PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_I7300_MCH_FB0);
goto error;
}
pvt->branch_pci[1] = pci_get_device(PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_I7300_MCH_FB1,
NULL);
if (!pvt->branch_pci[1]) {
i7300_printk(KERN_ERR,
"MC: 'BRANCH 1' device not found:"
"vendor 0x%x device 0x%x Func 0 "
"(broken BIOS?)\n",
PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_I7300_MCH_FB1);
goto error;
}
return 0;
error:
i7300_put_devices(mci);
return -ENODEV;
}
/*
* i7300_probe1 Probe for ONE instance of device to see if it is
* present.
* return:
* 0 for FOUND a device
* < 0 for error code
*/
static int i7300_probe1(struct pci_dev *pdev, int dev_idx)
{
struct mem_ctl_info *mci;
struct i7300_pvt *pvt;
int num_channels;
int num_dimms_per_channel;
int num_csrows;
if (dev_idx >= ARRAY_SIZE(i7300_devs))
return -EINVAL;
debugf0("MC: " __FILE__ ": %s(), pdev bus %u dev=0x%x fn=0x%x\n",
__func__,
pdev->bus->number,
PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
/* We only are looking for func 0 of the set */
if (PCI_FUNC(pdev->devfn) != 0)
return -ENODEV;
/* As we don't have a motherboard identification routine to determine
* actual number of slots/dimms per channel, we thus utilize the
* resource as specified by the chipset. Thus, we might have
* have more DIMMs per channel than actually on the mobo, but this
* allows the driver to support upto the chipset max, without
* some fancy mobo determination.
*/
num_dimms_per_channel = MAX_SLOTS;
num_channels = MAX_CHANNELS;
num_csrows = MAX_SLOTS * MAX_CHANNELS;
debugf0("MC: %s(): Number of - Channels= %d DIMMS= %d CSROWS= %d\n",
__func__, num_channels, num_dimms_per_channel, num_csrows);
/* allocate a new MC control structure */
mci = edac_mc_alloc(sizeof(*pvt), num_csrows, num_channels, 0);
if (mci == NULL)
return -ENOMEM;
debugf0("MC: " __FILE__ ": %s(): mci = %p\n", __func__, mci);
mci->dev = &pdev->dev; /* record ptr to the generic device */
pvt = mci->pvt_info;
pvt->system_address = pdev; /* Record this device in our private */
/* 'get' the pci devices we want to reserve for our use */
if (i7300_get_devices(mci, dev_idx))
goto fail0;
mci->mc_idx = 0;
mci->mtype_cap = MEM_FLAG_FB_DDR2;
mci->edac_ctl_cap = EDAC_FLAG_NONE;
mci->edac_cap = EDAC_FLAG_NONE;
mci->mod_name = "i7300_edac.c";
mci->mod_ver = I7300_REVISION;
mci->ctl_name = i7300_devs[dev_idx].ctl_name;
mci->dev_name = pci_name(pdev);
mci->ctl_page_to_phys = NULL;
#if 0
/* Set the function pointer to an actual operation function */
mci->edac_check = i7300_check_error;
#endif
/* initialize the MC control structure 'csrows' table
* with the mapping and control information */
if (i7300_get_mc_regs(mci)) {
debugf0("MC: Setting mci->edac_cap to EDAC_FLAG_NONE\n"
" because i7300_init_csrows() returned nonzero "
"value\n");
mci->edac_cap = EDAC_FLAG_NONE; /* no csrows found */
} else {
#if 0
debugf1("MC: Enable error reporting now\n");
i7300_enable_error_reporting(mci);
#endif
}
/* add this new MC control structure to EDAC's list of MCs */
if (edac_mc_add_mc(mci)) {
debugf0("MC: " __FILE__
": %s(): failed edac_mc_add_mc()\n", __func__);
/* FIXME: perhaps some code should go here that disables error
* reporting if we just enabled it
*/
goto fail1;
}
#if 0
i7300_clear_error(mci);
#endif
/* allocating generic PCI control info */
i7300_pci = edac_pci_create_generic_ctl(&pdev->dev, EDAC_MOD_STR);
if (!i7300_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__);
}
return 0;
/* Error exit unwinding stack */
fail1:
i7300_put_devices(mci);
fail0:
edac_mc_free(mci);
return -ENODEV;
}
/*
* i7300_init_one constructor for one instance of device
*
* returns:
* negative on error
* count (>= 0)
*/
static int __devinit i7300_init_one(struct pci_dev *pdev,
const struct pci_device_id *id)
{
int rc;
debugf0("MC: " __FILE__ ": %s()\n", __func__);
/* wake up device */
rc = pci_enable_device(pdev);
if (rc == -EIO)
return rc;
/* now probe and enable the device */
return i7300_probe1(pdev, id->driver_data);
}
/*
* i7300_remove_one destructor for one instance of device
*
*/
static void __devexit i7300_remove_one(struct pci_dev *pdev)
{
struct mem_ctl_info *mci;
debugf0(__FILE__ ": %s()\n", __func__);
if (i7300_pci)
edac_pci_release_generic_ctl(i7300_pci);
mci = edac_mc_del_mc(&pdev->dev);
if (!mci)
return;
/* retrieve references to resources, and free those resources */
i7300_put_devices(mci);
edac_mc_free(mci);
}
/*
* pci_device_id table for which devices we are looking for
*
* The "E500P" device is the first device supported.
*/
static const struct pci_device_id i7300_pci_tbl[] __devinitdata = {
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_I7300_MCH_ERR)},
{0,} /* 0 terminated list. */
};
MODULE_DEVICE_TABLE(pci, i7300_pci_tbl);
/*
* i7300_driver pci_driver structure for this module
*
*/
static struct pci_driver i7300_driver = {
.name = "i7300_edac",
.probe = i7300_init_one,
.remove = __devexit_p(i7300_remove_one),
.id_table = i7300_pci_tbl,
};
/*
* i7300_init Module entry function
* Try to initialize this module for its devices
*/
static int __init i7300_init(void)
{
int pci_rc;
debugf2("MC: " __FILE__ ": %s()\n", __func__);
/* Ensure that the OPSTATE is set correctly for POLL or NMI */
opstate_init();
pci_rc = pci_register_driver(&i7300_driver);
return (pci_rc < 0) ? pci_rc : 0;
}
/*
* i7300_exit() Module exit function
* Unregister the driver
*/
static void __exit i7300_exit(void)
{
debugf2("MC: " __FILE__ ": %s()\n", __func__);
pci_unregister_driver(&i7300_driver);
}
module_init(i7300_init);
module_exit(i7300_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)");
MODULE_DESCRIPTION("MC Driver for Intel I7300 memory controllers - "
I7300_REVISION);
module_param(edac_op_state, int, 0444);
MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");
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