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authorLinus Torvalds <torvalds@linux-foundation.org>2011-11-03 03:55:15 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2011-11-03 03:55:15 +0400
commit6681ba7ec480bc839584fd0817991d248b4b9e44 (patch)
tree994fb1de40d58ce8dac821cf1fec727e2f902f47 /drivers/edac
parent06ef93e1b8405acac6ec900564e3ad1a8e3a72b2 (diff)
parent4d096ca7e65584dd5845e64c6400f920e694f672 (diff)
downloadlinux-6681ba7ec480bc839584fd0817991d248b4b9e44.tar.xz
Merge branch 'linux_next' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-edac
* 'linux_next' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-edac: (21 commits) MAINTAINERS: add an entry for Edac Sandy Bridge driver edac: tag sb_edac as EXPERIMENTAL, as it requires more testing EDAC: Fix incorrect edac mode reporting in sb_edac edac: sb_edac: Add it to the building system edac: Add an experimental new driver to support Sandy Bridge CPU's i7300_edac: Fix error cleanup logic i7core_edac: Initialize memory name with cpu, channel, bank i7core_edac: Fix compilation on 32 bits arch i7core_edac: scrubbing fixups EDAC: Correct Kconfig dependencies i7core_edac: return -ENODEV if no MC is found i7core_edac: use edac's own way to print errors MAINTAINERS: remove dropped edac_mce.* from the file i7core_edac: Drop the edac_mce facility x86, MCE: Use notifier chain only for MCE decoding EDAC i7core: Use mce socketid for better compatibility i7core_edac: Don't enable memory scrubbing for Xeon 35xx i7core_edac: Add scrubbing support edac: Move edac main structs to include/linux/edac.h i7core_edac: Fix oops when trying to inject errors ...
Diffstat (limited to 'drivers/edac')
-rw-r--r--drivers/edac/Kconfig16
-rw-r--r--drivers/edac/Makefile2
-rw-r--r--drivers/edac/edac_core.h350
-rw-r--r--drivers/edac/edac_mce.c61
-rw-r--r--drivers/edac/i7300_edac.c51
-rw-r--r--drivers/edac/i7core_edac.c415
-rw-r--r--drivers/edac/sb_edac.c1893
7 files changed, 2308 insertions, 480 deletions
diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
index af1a17d42bd7..203361e4ef94 100644
--- a/drivers/edac/Kconfig
+++ b/drivers/edac/Kconfig
@@ -41,7 +41,7 @@ config EDAC_DEBUG
config EDAC_DECODE_MCE
tristate "Decode MCEs in human-readable form (only on AMD for now)"
- depends on CPU_SUP_AMD && X86_MCE
+ depends on CPU_SUP_AMD && X86_MCE_AMD
default y
---help---
Enable this option if you want to decode Machine Check Exceptions
@@ -71,9 +71,6 @@ config EDAC_MM_EDAC
occurred so that a particular failing memory module can be
replaced. If unsure, select 'Y'.
-config EDAC_MCE
- bool
-
config EDAC_AMD64
tristate "AMD64 (Opteron, Athlon64) K8, F10h"
depends on EDAC_MM_EDAC && AMD_NB && X86_64 && EDAC_DECODE_MCE
@@ -173,8 +170,7 @@ config EDAC_I5400
config EDAC_I7CORE
tristate "Intel i7 Core (Nehalem) processors"
- depends on EDAC_MM_EDAC && PCI && X86
- select EDAC_MCE
+ depends on EDAC_MM_EDAC && PCI && X86 && X86_MCE_INTEL
help
Support for error detection and correction the Intel
i7 Core (Nehalem) Integrated Memory Controller that exists on
@@ -216,6 +212,14 @@ config EDAC_I7300
Support for error detection and correction the Intel
Clarksboro MCH (Intel 7300 chipset).
+config EDAC_SBRIDGE
+ tristate "Intel Sandy-Bridge Integrated MC"
+ depends on EDAC_MM_EDAC && PCI && X86 && X86_MCE_INTEL
+ depends on EXPERIMENTAL
+ help
+ Support for error detection and correction the Intel
+ Sandy Bridge Integrated Memory Controller.
+
config EDAC_MPC85XX
tristate "Freescale MPC83xx / MPC85xx"
depends on EDAC_MM_EDAC && FSL_SOC && (PPC_83xx || PPC_85xx)
diff --git a/drivers/edac/Makefile b/drivers/edac/Makefile
index 3e239133e29e..196a63dd37c5 100644
--- a/drivers/edac/Makefile
+++ b/drivers/edac/Makefile
@@ -8,7 +8,6 @@
obj-$(CONFIG_EDAC) := edac_stub.o
obj-$(CONFIG_EDAC_MM_EDAC) += edac_core.o
-obj-$(CONFIG_EDAC_MCE) += edac_mce.o
edac_core-y := edac_mc.o edac_device.o edac_mc_sysfs.o edac_pci_sysfs.o
edac_core-y += edac_module.o edac_device_sysfs.o
@@ -29,6 +28,7 @@ obj-$(CONFIG_EDAC_I5100) += i5100_edac.o
obj-$(CONFIG_EDAC_I5400) += i5400_edac.o
obj-$(CONFIG_EDAC_I7300) += i7300_edac.o
obj-$(CONFIG_EDAC_I7CORE) += i7core_edac.o
+obj-$(CONFIG_EDAC_SBRIDGE) += sb_edac.o
obj-$(CONFIG_EDAC_E7XXX) += e7xxx_edac.o
obj-$(CONFIG_EDAC_E752X) += e752x_edac.o
obj-$(CONFIG_EDAC_I82443BXGX) += i82443bxgx_edac.o
diff --git a/drivers/edac/edac_core.h b/drivers/edac/edac_core.h
index 55b8278bb172..fe90cd4a7ebc 100644
--- a/drivers/edac/edac_core.h
+++ b/drivers/edac/edac_core.h
@@ -34,11 +34,10 @@
#include <linux/platform_device.h>
#include <linux/sysdev.h>
#include <linux/workqueue.h>
+#include <linux/edac.h>
-#define EDAC_MC_LABEL_LEN 31
#define EDAC_DEVICE_NAME_LEN 31
#define EDAC_ATTRIB_VALUE_LEN 15
-#define MC_PROC_NAME_MAX_LEN 7
#if PAGE_SHIFT < 20
#define PAGES_TO_MiB(pages) ((pages) >> (20 - PAGE_SHIFT))
@@ -101,353 +100,6 @@ extern int edac_debug_level;
#define edac_dev_name(dev) (dev)->dev_name
-/* memory devices */
-enum dev_type {
- DEV_UNKNOWN = 0,
- DEV_X1,
- DEV_X2,
- DEV_X4,
- DEV_X8,
- DEV_X16,
- DEV_X32, /* Do these parts exist? */
- DEV_X64 /* Do these parts exist? */
-};
-
-#define DEV_FLAG_UNKNOWN BIT(DEV_UNKNOWN)
-#define DEV_FLAG_X1 BIT(DEV_X1)
-#define DEV_FLAG_X2 BIT(DEV_X2)
-#define DEV_FLAG_X4 BIT(DEV_X4)
-#define DEV_FLAG_X8 BIT(DEV_X8)
-#define DEV_FLAG_X16 BIT(DEV_X16)
-#define DEV_FLAG_X32 BIT(DEV_X32)
-#define DEV_FLAG_X64 BIT(DEV_X64)
-
-/* memory types */
-enum mem_type {
- MEM_EMPTY = 0, /* Empty csrow */
- MEM_RESERVED, /* Reserved csrow type */
- MEM_UNKNOWN, /* Unknown csrow type */
- MEM_FPM, /* Fast page mode */
- MEM_EDO, /* Extended data out */
- MEM_BEDO, /* Burst Extended data out */
- MEM_SDR, /* Single data rate SDRAM */
- MEM_RDR, /* Registered single data rate SDRAM */
- MEM_DDR, /* Double data rate SDRAM */
- MEM_RDDR, /* Registered Double data rate SDRAM */
- MEM_RMBS, /* Rambus DRAM */
- MEM_DDR2, /* DDR2 RAM */
- MEM_FB_DDR2, /* fully buffered DDR2 */
- MEM_RDDR2, /* Registered DDR2 RAM */
- MEM_XDR, /* Rambus XDR */
- MEM_DDR3, /* DDR3 RAM */
- MEM_RDDR3, /* Registered DDR3 RAM */
-};
-
-#define MEM_FLAG_EMPTY BIT(MEM_EMPTY)
-#define MEM_FLAG_RESERVED BIT(MEM_RESERVED)
-#define MEM_FLAG_UNKNOWN BIT(MEM_UNKNOWN)
-#define MEM_FLAG_FPM BIT(MEM_FPM)
-#define MEM_FLAG_EDO BIT(MEM_EDO)
-#define MEM_FLAG_BEDO BIT(MEM_BEDO)
-#define MEM_FLAG_SDR BIT(MEM_SDR)
-#define MEM_FLAG_RDR BIT(MEM_RDR)
-#define MEM_FLAG_DDR BIT(MEM_DDR)
-#define MEM_FLAG_RDDR BIT(MEM_RDDR)
-#define MEM_FLAG_RMBS BIT(MEM_RMBS)
-#define MEM_FLAG_DDR2 BIT(MEM_DDR2)
-#define MEM_FLAG_FB_DDR2 BIT(MEM_FB_DDR2)
-#define MEM_FLAG_RDDR2 BIT(MEM_RDDR2)
-#define MEM_FLAG_XDR BIT(MEM_XDR)
-#define MEM_FLAG_DDR3 BIT(MEM_DDR3)
-#define MEM_FLAG_RDDR3 BIT(MEM_RDDR3)
-
-/* chipset Error Detection and Correction capabilities and mode */
-enum edac_type {
- EDAC_UNKNOWN = 0, /* Unknown if ECC is available */
- EDAC_NONE, /* Doesn't support ECC */
- EDAC_RESERVED, /* Reserved ECC type */
- EDAC_PARITY, /* Detects parity errors */
- EDAC_EC, /* Error Checking - no correction */
- EDAC_SECDED, /* Single bit error correction, Double detection */
- EDAC_S2ECD2ED, /* Chipkill x2 devices - do these exist? */
- EDAC_S4ECD4ED, /* Chipkill x4 devices */
- EDAC_S8ECD8ED, /* Chipkill x8 devices */
- EDAC_S16ECD16ED, /* Chipkill x16 devices */
-};
-
-#define EDAC_FLAG_UNKNOWN BIT(EDAC_UNKNOWN)
-#define EDAC_FLAG_NONE BIT(EDAC_NONE)
-#define EDAC_FLAG_PARITY BIT(EDAC_PARITY)
-#define EDAC_FLAG_EC BIT(EDAC_EC)
-#define EDAC_FLAG_SECDED BIT(EDAC_SECDED)
-#define EDAC_FLAG_S2ECD2ED BIT(EDAC_S2ECD2ED)
-#define EDAC_FLAG_S4ECD4ED BIT(EDAC_S4ECD4ED)
-#define EDAC_FLAG_S8ECD8ED BIT(EDAC_S8ECD8ED)
-#define EDAC_FLAG_S16ECD16ED BIT(EDAC_S16ECD16ED)
-
-/* scrubbing capabilities */
-enum scrub_type {
- SCRUB_UNKNOWN = 0, /* Unknown if scrubber is available */
- SCRUB_NONE, /* No scrubber */
- SCRUB_SW_PROG, /* SW progressive (sequential) scrubbing */
- SCRUB_SW_SRC, /* Software scrub only errors */
- SCRUB_SW_PROG_SRC, /* Progressive software scrub from an error */
- SCRUB_SW_TUNABLE, /* Software scrub frequency is tunable */
- SCRUB_HW_PROG, /* HW progressive (sequential) scrubbing */
- SCRUB_HW_SRC, /* Hardware scrub only errors */
- SCRUB_HW_PROG_SRC, /* Progressive hardware scrub from an error */
- SCRUB_HW_TUNABLE /* Hardware scrub frequency is tunable */
-};
-
-#define SCRUB_FLAG_SW_PROG BIT(SCRUB_SW_PROG)
-#define SCRUB_FLAG_SW_SRC BIT(SCRUB_SW_SRC)
-#define SCRUB_FLAG_SW_PROG_SRC BIT(SCRUB_SW_PROG_SRC)
-#define SCRUB_FLAG_SW_TUN BIT(SCRUB_SW_SCRUB_TUNABLE)
-#define SCRUB_FLAG_HW_PROG BIT(SCRUB_HW_PROG)
-#define SCRUB_FLAG_HW_SRC BIT(SCRUB_HW_SRC)
-#define SCRUB_FLAG_HW_PROG_SRC BIT(SCRUB_HW_PROG_SRC)
-#define SCRUB_FLAG_HW_TUN BIT(SCRUB_HW_TUNABLE)
-
-/* FIXME - should have notify capabilities: NMI, LOG, PROC, etc */
-
-/* EDAC internal operation states */
-#define OP_ALLOC 0x100
-#define OP_RUNNING_POLL 0x201
-#define OP_RUNNING_INTERRUPT 0x202
-#define OP_RUNNING_POLL_INTR 0x203
-#define OP_OFFLINE 0x300
-
-/*
- * There are several things to be aware of that aren't at all obvious:
- *
- *
- * SOCKETS, SOCKET SETS, BANKS, ROWS, CHIP-SELECT ROWS, CHANNELS, etc..
- *
- * These are some of the many terms that are thrown about that don't always
- * mean what people think they mean (Inconceivable!). In the interest of
- * creating a common ground for discussion, terms and their definitions
- * will be established.
- *
- * Memory devices: The individual chip on a memory stick. These devices
- * commonly output 4 and 8 bits each. Grouping several
- * of these in parallel provides 64 bits which is common
- * for a memory stick.
- *
- * Memory Stick: A printed circuit board that aggregates multiple
- * memory devices in parallel. This is the atomic
- * memory component that is purchaseable by Joe consumer
- * and loaded into a memory socket.
- *
- * Socket: A physical connector on the motherboard that accepts
- * a single memory stick.
- *
- * Channel: Set of memory devices on a memory stick that must be
- * grouped in parallel with one or more additional
- * channels from other memory sticks. This parallel
- * grouping of the output from multiple channels are
- * necessary for the smallest granularity of memory access.
- * Some memory controllers are capable of single channel -
- * which means that memory sticks can be loaded
- * individually. Other memory controllers are only
- * capable of dual channel - which means that memory
- * sticks must be loaded as pairs (see "socket set").
- *
- * Chip-select row: All of the memory devices that are selected together.
- * for a single, minimum grain of memory access.
- * This selects all of the parallel memory devices across
- * all of the parallel channels. Common chip-select rows
- * for single channel are 64 bits, for dual channel 128
- * bits.
- *
- * Single-Ranked stick: A Single-ranked stick has 1 chip-select row of memory.
- * Motherboards commonly drive two chip-select pins to
- * a memory stick. A single-ranked stick, will occupy
- * only one of those rows. The other will be unused.
- *
- * Double-Ranked stick: A double-ranked stick has two chip-select rows which
- * access different sets of memory devices. The two
- * rows cannot be accessed concurrently.
- *
- * Double-sided stick: DEPRECATED TERM, see Double-Ranked stick.
- * A double-sided stick has two chip-select rows which
- * access different sets of memory devices. The two
- * rows cannot be accessed concurrently. "Double-sided"
- * is irrespective of the memory devices being mounted
- * on both sides of the memory stick.
- *
- * Socket set: All of the memory sticks that are required for
- * a single memory access or all of the memory sticks
- * spanned by a chip-select row. A single socket set
- * has two chip-select rows and if double-sided sticks
- * are used these will occupy those chip-select rows.
- *
- * Bank: This term is avoided because it is unclear when
- * needing to distinguish between chip-select rows and
- * socket sets.
- *
- * Controller pages:
- *
- * Physical pages:
- *
- * Virtual pages:
- *
- *
- * STRUCTURE ORGANIZATION AND CHOICES
- *
- *
- *
- * PS - I enjoyed writing all that about as much as you enjoyed reading it.
- */
-
-struct channel_info {
- int chan_idx; /* channel index */
- u32 ce_count; /* Correctable Errors for this CHANNEL */
- char label[EDAC_MC_LABEL_LEN + 1]; /* DIMM label on motherboard */
- struct csrow_info *csrow; /* the parent */
-};
-
-struct csrow_info {
- unsigned long first_page; /* first page number in dimm */
- unsigned long last_page; /* last page number in dimm */
- unsigned long page_mask; /* used for interleaving -
- * 0UL for non intlv
- */
- u32 nr_pages; /* number of pages in csrow */
- u32 grain; /* granularity of reported error in bytes */
- int csrow_idx; /* the chip-select row */
- enum dev_type dtype; /* memory device type */
- u32 ue_count; /* Uncorrectable Errors for this csrow */
- u32 ce_count; /* Correctable Errors for this csrow */
- enum mem_type mtype; /* memory csrow type */
- enum edac_type edac_mode; /* EDAC mode for this csrow */
- struct mem_ctl_info *mci; /* the parent */
-
- struct kobject kobj; /* sysfs kobject for this csrow */
-
- /* channel information for this csrow */
- u32 nr_channels;
- struct channel_info *channels;
-};
-
-struct mcidev_sysfs_group {
- const char *name; /* group name */
- const struct mcidev_sysfs_attribute *mcidev_attr; /* group attributes */
-};
-
-struct mcidev_sysfs_group_kobj {
- struct list_head list; /* list for all instances within a mc */
-
- struct kobject kobj; /* kobj for the group */
-
- const struct mcidev_sysfs_group *grp; /* group description table */
- struct mem_ctl_info *mci; /* the parent */
-};
-
-/* mcidev_sysfs_attribute structure
- * used for driver sysfs attributes and in mem_ctl_info
- * sysfs top level entries
- */
-struct mcidev_sysfs_attribute {
- /* It should use either attr or grp */
- struct attribute attr;
- const struct mcidev_sysfs_group *grp; /* Points to a group of attributes */
-
- /* Ops for show/store values at the attribute - not used on group */
- ssize_t (*show)(struct mem_ctl_info *,char *);
- ssize_t (*store)(struct mem_ctl_info *, const char *,size_t);
-};
-
-/* MEMORY controller information structure
- */
-struct mem_ctl_info {
- struct list_head link; /* for global list of mem_ctl_info structs */
-
- struct module *owner; /* Module owner of this control struct */
-
- unsigned long mtype_cap; /* memory types supported by mc */
- unsigned long edac_ctl_cap; /* Mem controller EDAC capabilities */
- unsigned long edac_cap; /* configuration capabilities - this is
- * closely related to edac_ctl_cap. The
- * difference is that the controller may be
- * capable of s4ecd4ed which would be listed
- * in edac_ctl_cap, but if channels aren't
- * capable of s4ecd4ed then the edac_cap would
- * not have that capability.
- */
- unsigned long scrub_cap; /* chipset scrub capabilities */
- enum scrub_type scrub_mode; /* current scrub mode */
-
- /* Translates sdram memory scrub rate given in bytes/sec to the
- internal representation and configures whatever else needs
- to be configured.
- */
- int (*set_sdram_scrub_rate) (struct mem_ctl_info * mci, u32 bw);
-
- /* Get the current sdram memory scrub rate from the internal
- representation and converts it to the closest matching
- bandwidth in bytes/sec.
- */
- int (*get_sdram_scrub_rate) (struct mem_ctl_info * mci);
-
-
- /* pointer to edac checking routine */
- void (*edac_check) (struct mem_ctl_info * mci);
-
- /*
- * Remaps memory pages: controller pages to physical pages.
- * For most MC's, this will be NULL.
- */
- /* FIXME - why not send the phys page to begin with? */
- unsigned long (*ctl_page_to_phys) (struct mem_ctl_info * mci,
- unsigned long page);
- int mc_idx;
- int nr_csrows;
- struct csrow_info *csrows;
- /*
- * FIXME - what about controllers on other busses? - IDs must be
- * unique. dev pointer should be sufficiently unique, but
- * BUS:SLOT.FUNC numbers may not be unique.
- */
- struct device *dev;
- const char *mod_name;
- const char *mod_ver;
- const char *ctl_name;
- const char *dev_name;
- char proc_name[MC_PROC_NAME_MAX_LEN + 1];
- void *pvt_info;
- u32 ue_noinfo_count; /* Uncorrectable Errors w/o info */
- u32 ce_noinfo_count; /* Correctable Errors w/o info */
- u32 ue_count; /* Total Uncorrectable Errors for this MC */
- u32 ce_count; /* Total Correctable Errors for this MC */
- unsigned long start_time; /* mci load start time (in jiffies) */
-
- struct completion complete;
-
- /* edac sysfs device control */
- struct kobject edac_mci_kobj;
-
- /* list for all grp instances within a mc */
- struct list_head grp_kobj_list;
-
- /* Additional top controller level attributes, but specified
- * by the low level driver.
- *
- * Set by the low level driver to provide attributes at the
- * controller level, same level as 'ue_count' and 'ce_count' above.
- * An array of structures, NULL terminated
- *
- * If attributes are desired, then set to array of attributes
- * If no attributes are desired, leave NULL
- */
- const struct mcidev_sysfs_attribute *mc_driver_sysfs_attributes;
-
- /* work struct for this MC */
- struct delayed_work work;
-
- /* the internal state of this controller instance */
- int op_state;
-};
-
/*
* The following are the structures to provide for a generic
* or abstract 'edac_device'. This set of structures and the
diff --git a/drivers/edac/edac_mce.c b/drivers/edac/edac_mce.c
deleted file mode 100644
index 9ccdc5b140e7..000000000000
--- a/drivers/edac/edac_mce.c
+++ /dev/null
@@ -1,61 +0,0 @@
-/* Provides edac interface to mcelog events
- *
- * This file may be distributed under the terms of the
- * GNU General Public License version 2.
- *
- * Copyright (c) 2009 by:
- * Mauro Carvalho Chehab <mchehab@redhat.com>
- *
- * Red Hat Inc. http://www.redhat.com
- */
-
-#include <linux/module.h>
-#include <linux/edac_mce.h>
-#include <asm/mce.h>
-
-int edac_mce_enabled;
-EXPORT_SYMBOL_GPL(edac_mce_enabled);
-
-
-/*
- * Extension interface
- */
-
-static LIST_HEAD(edac_mce_list);
-static DEFINE_MUTEX(edac_mce_lock);
-
-int edac_mce_register(struct edac_mce *edac_mce)
-{
- mutex_lock(&edac_mce_lock);
- list_add_tail(&edac_mce->list, &edac_mce_list);
- mutex_unlock(&edac_mce_lock);
- return 0;
-}
-EXPORT_SYMBOL(edac_mce_register);
-
-void edac_mce_unregister(struct edac_mce *edac_mce)
-{
- mutex_lock(&edac_mce_lock);
- list_del(&edac_mce->list);
- mutex_unlock(&edac_mce_lock);
-}
-EXPORT_SYMBOL(edac_mce_unregister);
-
-int edac_mce_parse(struct mce *mce)
-{
- struct edac_mce *edac_mce;
-
- list_for_each_entry(edac_mce, &edac_mce_list, list) {
- if (edac_mce->check_error(edac_mce->priv, mce))
- return 1;
- }
-
- /* Nobody queued the error */
- return 0;
-}
-EXPORT_SYMBOL_GPL(edac_mce_parse);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
-MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)");
-MODULE_DESCRIPTION("EDAC Driver for mcelog captured errors");
diff --git a/drivers/edac/i7300_edac.c b/drivers/edac/i7300_edac.c
index a76fe8366b68..6104dba380b6 100644
--- a/drivers/edac/i7300_edac.c
+++ b/drivers/edac/i7300_edac.c
@@ -372,7 +372,7 @@ static const char *get_err_from_table(const char *table[], int size, int pos)
static void i7300_process_error_global(struct mem_ctl_info *mci)
{
struct i7300_pvt *pvt;
- u32 errnum, value;
+ u32 errnum, error_reg;
unsigned long errors;
const char *specific;
bool is_fatal;
@@ -381,9 +381,9 @@ static void i7300_process_error_global(struct mem_ctl_info *mci)
/* read in the 1st FATAL error register */
pci_read_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
- FERR_GLOBAL_HI, &value);
- if (unlikely(value)) {
- errors = value;
+ FERR_GLOBAL_HI, &error_reg);
+ if (unlikely(error_reg)) {
+ errors = error_reg;
errnum = find_first_bit(&errors,
ARRAY_SIZE(ferr_global_hi_name));
specific = GET_ERR_FROM_TABLE(ferr_global_hi_name, errnum);
@@ -391,15 +391,15 @@ static void i7300_process_error_global(struct mem_ctl_info *mci)
/* Clear the error bit */
pci_write_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
- FERR_GLOBAL_HI, value);
+ FERR_GLOBAL_HI, error_reg);
goto error_global;
}
pci_read_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
- FERR_GLOBAL_LO, &value);
- if (unlikely(value)) {
- errors = value;
+ FERR_GLOBAL_LO, &error_reg);
+ if (unlikely(error_reg)) {
+ errors = error_reg;
errnum = find_first_bit(&errors,
ARRAY_SIZE(ferr_global_lo_name));
specific = GET_ERR_FROM_TABLE(ferr_global_lo_name, errnum);
@@ -407,7 +407,7 @@ static void i7300_process_error_global(struct mem_ctl_info *mci)
/* Clear the error bit */
pci_write_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
- FERR_GLOBAL_LO, value);
+ FERR_GLOBAL_LO, error_reg);
goto error_global;
}
@@ -427,7 +427,7 @@ error_global:
static void i7300_process_fbd_error(struct mem_ctl_info *mci)
{
struct i7300_pvt *pvt;
- u32 errnum, value;
+ u32 errnum, value, error_reg;
u16 val16;
unsigned branch, channel, bank, rank, cas, ras;
u32 syndrome;
@@ -440,14 +440,14 @@ static void i7300_process_fbd_error(struct mem_ctl_info *mci)
/* read in the 1st FATAL error register */
pci_read_config_dword(pvt->pci_dev_16_1_fsb_addr_map,
- FERR_FAT_FBD, &value);
- if (unlikely(value & FERR_FAT_FBD_ERR_MASK)) {
- errors = value & FERR_FAT_FBD_ERR_MASK ;
+ FERR_FAT_FBD, &error_reg);
+ if (unlikely(error_reg & FERR_FAT_FBD_ERR_MASK)) {
+ errors = error_reg & FERR_FAT_FBD_ERR_MASK ;
errnum = find_first_bit(&errors,
ARRAY_SIZE(ferr_fat_fbd_name));
specific = GET_ERR_FROM_TABLE(ferr_fat_fbd_name, errnum);
+ branch = (GET_FBD_FAT_IDX(error_reg) == 2) ? 1 : 0;
- branch = (GET_FBD_FAT_IDX(value) == 2) ? 1 : 0;
pci_read_config_word(pvt->pci_dev_16_1_fsb_addr_map,
NRECMEMA, &val16);
bank = NRECMEMA_BANK(val16);
@@ -455,11 +455,14 @@ static void i7300_process_fbd_error(struct mem_ctl_info *mci)
pci_read_config_dword(pvt->pci_dev_16_1_fsb_addr_map,
NRECMEMB, &value);
-
is_wr = NRECMEMB_IS_WR(value);
cas = NRECMEMB_CAS(value);
ras = NRECMEMB_RAS(value);
+ /* Clean the error register */
+ pci_write_config_dword(pvt->pci_dev_16_1_fsb_addr_map,
+ FERR_FAT_FBD, error_reg);
+
snprintf(pvt->tmp_prt_buffer, PAGE_SIZE,
"FATAL (Branch=%d DRAM-Bank=%d %s "
"RAS=%d CAS=%d Err=0x%lx (%s))",
@@ -476,21 +479,17 @@ static void i7300_process_fbd_error(struct mem_ctl_info *mci)
/* read in the 1st NON-FATAL error register */
pci_read_config_dword(pvt->pci_dev_16_1_fsb_addr_map,
- FERR_NF_FBD, &value);
- if (unlikely(value & FERR_NF_FBD_ERR_MASK)) {
- errors = value & FERR_NF_FBD_ERR_MASK;
+ FERR_NF_FBD, &error_reg);
+ if (unlikely(error_reg & FERR_NF_FBD_ERR_MASK)) {
+ errors = error_reg & FERR_NF_FBD_ERR_MASK;
errnum = find_first_bit(&errors,
ARRAY_SIZE(ferr_nf_fbd_name));
specific = GET_ERR_FROM_TABLE(ferr_nf_fbd_name, errnum);
-
- /* Clear the error bit */
- pci_write_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
- FERR_GLOBAL_LO, value);
+ branch = (GET_FBD_FAT_IDX(error_reg) == 2) ? 1 : 0;
pci_read_config_dword(pvt->pci_dev_16_1_fsb_addr_map,
REDMEMA, &syndrome);
- branch = (GET_FBD_FAT_IDX(value) == 2) ? 1 : 0;
pci_read_config_word(pvt->pci_dev_16_1_fsb_addr_map,
RECMEMA, &val16);
bank = RECMEMA_BANK(val16);
@@ -498,18 +497,20 @@ static void i7300_process_fbd_error(struct mem_ctl_info *mci)
pci_read_config_dword(pvt->pci_dev_16_1_fsb_addr_map,
RECMEMB, &value);
-
is_wr = RECMEMB_IS_WR(value);
cas = RECMEMB_CAS(value);
ras = RECMEMB_RAS(value);
pci_read_config_dword(pvt->pci_dev_16_1_fsb_addr_map,
REDMEMB, &value);
-
channel = (branch << 1);
if (IS_SECOND_CH(value))
channel++;
+ /* Clear the error bit */
+ pci_write_config_dword(pvt->pci_dev_16_1_fsb_addr_map,
+ FERR_NF_FBD, error_reg);
+
/* Form out message */
snprintf(pvt->tmp_prt_buffer, PAGE_SIZE,
"Corrected error (Branch=%d, Channel %d), "
diff --git a/drivers/edac/i7core_edac.c b/drivers/edac/i7core_edac.c
index f6cf448d69b4..70ad8923f1d7 100644
--- a/drivers/edac/i7core_edac.c
+++ b/drivers/edac/i7core_edac.c
@@ -31,11 +31,13 @@
#include <linux/pci_ids.h>
#include <linux/slab.h>
#include <linux/delay.h>
+#include <linux/dmi.h>
#include <linux/edac.h>
#include <linux/mmzone.h>
-#include <linux/edac_mce.h>
#include <linux/smp.h>
+#include <asm/mce.h>
#include <asm/processor.h>
+#include <asm/div64.h>
#include "edac_core.h"
@@ -78,6 +80,8 @@ MODULE_PARM_DESC(use_pci_fixup, "Enable PCI fixup to seek for hidden devices");
/* OFFSETS for Device 0 Function 0 */
#define MC_CFG_CONTROL 0x90
+ #define MC_CFG_UNLOCK 0x02
+ #define MC_CFG_LOCK 0x00
/* OFFSETS for Device 3 Function 0 */
@@ -98,6 +102,15 @@ MODULE_PARM_DESC(use_pci_fixup, "Enable PCI fixup to seek for hidden devices");
#define DIMM0_COR_ERR(r) ((r) & 0x7fff)
/* OFFSETS for Device 3 Function 2, as inicated on Xeon 5500 datasheet */
+#define MC_SSRCONTROL 0x48
+ #define SSR_MODE_DISABLE 0x00
+ #define SSR_MODE_ENABLE 0x01
+ #define SSR_MODE_MASK 0x03
+
+#define MC_SCRUB_CONTROL 0x4c
+ #define STARTSCRUB (1 << 24)
+ #define SCRUBINTERVAL_MASK 0xffffff
+
#define MC_COR_ECC_CNT_0 0x80
#define MC_COR_ECC_CNT_1 0x84
#define MC_COR_ECC_CNT_2 0x88
@@ -253,10 +266,7 @@ struct i7core_pvt {
unsigned long rdimm_ce_count[NUM_CHANS][MAX_DIMMS];
int rdimm_last_ce_count[NUM_CHANS][MAX_DIMMS];
- unsigned int is_registered;
-
- /* mcelog glue */
- struct edac_mce edac_mce;
+ bool is_registered, enable_scrub;
/* Fifo double buffers */
struct mce mce_entry[MCE_LOG_LEN];
@@ -268,6 +278,9 @@ struct i7core_pvt {
/* Count indicator to show errors not got */
unsigned mce_overrun;
+ /* DCLK Frequency used for computing scrub rate */
+ int dclk_freq;
+
/* Struct to control EDAC polling */
struct edac_pci_ctl_info *i7core_pci;
};
@@ -281,8 +294,7 @@ static const struct pci_id_descr pci_dev_descr_i7core_nehalem[] = {
/* Memory controller */
{ PCI_DESCR(3, 0, PCI_DEVICE_ID_INTEL_I7_MCR) },
{ PCI_DESCR(3, 1, PCI_DEVICE_ID_INTEL_I7_MC_TAD) },
-
- /* Exists only for RDIMM */
+ /* Exists only for RDIMM */
{ PCI_DESCR(3, 2, PCI_DEVICE_ID_INTEL_I7_MC_RAS), .optional = 1 },
{ PCI_DESCR(3, 4, PCI_DEVICE_ID_INTEL_I7_MC_TEST) },
@@ -303,6 +315,16 @@ static const struct pci_id_descr pci_dev_descr_i7core_nehalem[] = {
{ PCI_DESCR(6, 1, PCI_DEVICE_ID_INTEL_I7_MC_CH2_ADDR) },
{ PCI_DESCR(6, 2, PCI_DEVICE_ID_INTEL_I7_MC_CH2_RANK) },
{ PCI_DESCR(6, 3, PCI_DEVICE_ID_INTEL_I7_MC_CH2_TC) },
+
+ /* Generic Non-core registers */
+ /*
+ * This is the PCI device on i7core and on Xeon 35xx (8086:2c41)
+ * On Xeon 55xx, however, it has a different id (8086:2c40). So,
+ * the probing code needs to test for the other address in case of
+ * failure of this one
+ */
+ { PCI_DESCR(0, 0, PCI_DEVICE_ID_INTEL_I7_NONCORE) },
+
};
static const struct pci_id_descr pci_dev_descr_lynnfield[] = {
@@ -319,6 +341,12 @@ static const struct pci_id_descr pci_dev_descr_lynnfield[] = {
{ PCI_DESCR( 5, 1, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH1_ADDR) },
{ PCI_DESCR( 5, 2, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH1_RANK) },
{ PCI_DESCR( 5, 3, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH1_TC) },
+
+ /*
+ * This is the PCI device has an alternate address on some
+ * processors like Core i7 860
+ */
+ { PCI_DESCR( 0, 0, PCI_DEVICE_ID_INTEL_LYNNFIELD_NONCORE) },
};
static const struct pci_id_descr pci_dev_descr_i7core_westmere[] = {
@@ -346,6 +374,10 @@ static const struct pci_id_descr pci_dev_descr_i7core_westmere[] = {
{ PCI_DESCR(6, 1, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH2_ADDR_REV2) },
{ PCI_DESCR(6, 2, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH2_RANK_REV2) },
{ PCI_DESCR(6, 3, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH2_TC_REV2) },
+
+ /* Generic Non-core registers */
+ { PCI_DESCR(0, 0, PCI_DEVICE_ID_INTEL_LYNNFIELD_NONCORE_REV2) },
+
};
#define PCI_ID_TABLE_ENTRY(A) { .descr=A, .n_devs = ARRAY_SIZE(A) }
@@ -714,6 +746,10 @@ static int get_dimm_config(const struct mem_ctl_info *mci)
csr->edac_mode = mode;
csr->mtype = mtype;
+ snprintf(csr->channels[0].label,
+ sizeof(csr->channels[0].label),
+ "CPU#%uChannel#%u_DIMM#%u",
+ pvt->i7core_dev->socket, i, j);
csrow++;
}
@@ -731,7 +767,7 @@ static int get_dimm_config(const struct mem_ctl_info *mci)
debugf1("\t\t%#x\t%#x\t%#x\n",
(value[j] >> 27) & 0x1,
(value[j] >> 24) & 0x7,
- (value[j] && ((1 << 24) - 1)));
+ (value[j] & ((1 << 24) - 1)));
}
return 0;
@@ -1324,6 +1360,20 @@ static int i7core_get_onedevice(struct pci_dev **prev,
pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
dev_descr->dev_id, *prev);
+ /*
+ * On Xeon 55xx, the Intel Quckpath Arch Generic Non-core regs
+ * is at addr 8086:2c40, instead of 8086:2c41. So, we need
+ * to probe for the alternate address in case of failure
+ */
+ if (dev_descr->dev_id == PCI_DEVICE_ID_INTEL_I7_NONCORE && !pdev)
+ pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
+ PCI_DEVICE_ID_INTEL_I7_NONCORE_ALT, *prev);
+
+ if (dev_descr->dev_id == PCI_DEVICE_ID_INTEL_LYNNFIELD_NONCORE && !pdev)
+ pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
+ PCI_DEVICE_ID_INTEL_LYNNFIELD_NONCORE_ALT,
+ *prev);
+
if (!pdev) {
if (*prev) {
*prev = pdev;
@@ -1444,8 +1494,10 @@ static int mci_bind_devs(struct mem_ctl_info *mci,
struct i7core_pvt *pvt = mci->pvt_info;
struct pci_dev *pdev;
int i, func, slot;
+ char *family;
- pvt->is_registered = 0;
+ pvt->is_registered = false;
+ pvt->enable_scrub = false;
for (i = 0; i < i7core_dev->n_devs; i++) {
pdev = i7core_dev->pdev[i];
if (!pdev)
@@ -1461,9 +1513,37 @@ static int mci_bind_devs(struct mem_ctl_info *mci,
if (unlikely(func > MAX_CHAN_FUNC))
goto error;
pvt->pci_ch[slot - 4][func] = pdev;
- } else if (!slot && !func)
+ } else if (!slot && !func) {
pvt->pci_noncore = pdev;
- else
+
+ /* Detect the processor family */
+ switch (pdev->device) {
+ case PCI_DEVICE_ID_INTEL_I7_NONCORE:
+ family = "Xeon 35xx/ i7core";
+ pvt->enable_scrub = false;
+ break;
+ case PCI_DEVICE_ID_INTEL_LYNNFIELD_NONCORE_ALT:
+ family = "i7-800/i5-700";
+ pvt->enable_scrub = false;
+ break;
+ case PCI_DEVICE_ID_INTEL_LYNNFIELD_NONCORE:
+ family = "Xeon 34xx";
+ pvt->enable_scrub = false;
+ break;
+ case PCI_DEVICE_ID_INTEL_I7_NONCORE_ALT:
+ family = "Xeon 55xx";
+ pvt->enable_scrub = true;
+ break;
+ case PCI_DEVICE_ID_INTEL_LYNNFIELD_NONCORE_REV2:
+ family = "Xeon 56xx / i7-900";
+ pvt->enable_scrub = true;
+ break;
+ default:
+ family = "unknown";
+ pvt->enable_scrub = false;
+ }
+ debugf0("Detected a processor type %s\n", family);
+ } else
goto error;
debugf0("Associated fn %d.%d, dev = %p, socket %d\n",
@@ -1472,7 +1552,7 @@ static int mci_bind_devs(struct mem_ctl_info *mci,
if (PCI_SLOT(pdev->devfn) == 3 &&
PCI_FUNC(pdev->devfn) == 2)
- pvt->is_registered = 1;
+ pvt->is_registered = true;
}
return 0;
@@ -1826,33 +1906,43 @@ check_ce_error:
* WARNING: As this routine should be called at NMI time, extra care should
* be taken to avoid deadlocks, and to be as fast as possible.
*/
-static int i7core_mce_check_error(void *priv, struct mce *mce)
+static int i7core_mce_check_error(struct notifier_block *nb, unsigned long val,
+ void *data)
{
- struct mem_ctl_info *mci = priv;
- struct i7core_pvt *pvt = mci->pvt_info;
+ struct mce *mce = (struct mce *)data;
+ struct i7core_dev *i7_dev;
+ struct mem_ctl_info *mci;
+ struct i7core_pvt *pvt;
+
+ i7_dev = get_i7core_dev(mce->socketid);
+ if (!i7_dev)
+ return NOTIFY_BAD;
+
+ mci = i7_dev->mci;
+ pvt = mci->pvt_info;
/*
* Just let mcelog handle it if the error is
* outside the memory controller
*/
if (((mce->status & 0xffff) >> 7) != 1)
- return 0;
+ return NOTIFY_DONE;
/* Bank 8 registers are the only ones that we know how to handle */
if (mce->bank != 8)
- return 0;
+ return NOTIFY_DONE;
#ifdef CONFIG_SMP
/* Only handle if it is the right mc controller */
- if (cpu_data(mce->cpu).phys_proc_id != pvt->i7core_dev->socket)
- return 0;
+ if (mce->socketid != pvt->i7core_dev->socket)
+ return NOTIFY_DONE;
#endif
smp_rmb();
if ((pvt->mce_out + 1) % MCE_LOG_LEN == pvt->mce_in) {
smp_wmb();
pvt->mce_overrun++;
- return 0;
+ return NOTIFY_DONE;
}
/* Copy memory error at the ringbuffer */
@@ -1865,7 +1955,240 @@ static int i7core_mce_check_error(void *priv, struct mce *mce)
i7core_check_error(mci);
/* Advise mcelog that the errors were handled */
- return 1;
+ return NOTIFY_STOP;
+}
+
+static struct notifier_block i7_mce_dec = {
+ .notifier_call = i7core_mce_check_error,
+};
+
+struct memdev_dmi_entry {
+ u8 type;
+ u8 length;
+ u16 handle;
+ u16 phys_mem_array_handle;
+ u16 mem_err_info_handle;
+ u16 total_width;
+ u16 data_width;
+ u16 size;
+ u8 form;
+ u8 device_set;
+ u8 device_locator;
+ u8 bank_locator;
+ u8 memory_type;
+ u16 type_detail;
+ u16 speed;
+ u8 manufacturer;
+ u8 serial_number;
+ u8 asset_tag;
+ u8 part_number;
+ u8 attributes;
+ u32 extended_size;
+ u16 conf_mem_clk_speed;
+} __attribute__((__packed__));
+
+
+/*
+ * Decode the DRAM Clock Frequency, be paranoid, make sure that all
+ * memory devices show the same speed, and if they don't then consider
+ * all speeds to be invalid.
+ */
+static void decode_dclk(const struct dmi_header *dh, void *_dclk_freq)
+{
+ int *dclk_freq = _dclk_freq;
+ u16 dmi_mem_clk_speed;
+
+ if (*dclk_freq == -1)
+ return;
+
+ if (dh->type == DMI_ENTRY_MEM_DEVICE) {
+ struct memdev_dmi_entry *memdev_dmi_entry =
+ (struct memdev_dmi_entry *)dh;
+ unsigned long conf_mem_clk_speed_offset =
+ (unsigned long)&memdev_dmi_entry->conf_mem_clk_speed -
+ (unsigned long)&memdev_dmi_entry->type;
+ unsigned long speed_offset =
+ (unsigned long)&memdev_dmi_entry->speed -
+ (unsigned long)&memdev_dmi_entry->type;
+
+ /* Check that a DIMM is present */
+ if (memdev_dmi_entry->size == 0)
+ return;
+
+ /*
+ * Pick the configured speed if it's available, otherwise
+ * pick the DIMM speed, or we don't have a speed.
+ */
+ if (memdev_dmi_entry->length > conf_mem_clk_speed_offset) {
+ dmi_mem_clk_speed =
+ memdev_dmi_entry->conf_mem_clk_speed;
+ } else if (memdev_dmi_entry->length > speed_offset) {
+ dmi_mem_clk_speed = memdev_dmi_entry->speed;
+ } else {
+ *dclk_freq = -1;
+ return;
+ }
+
+ if (*dclk_freq == 0) {
+ /* First pass, speed was 0 */
+ if (dmi_mem_clk_speed > 0) {
+ /* Set speed if a valid speed is read */
+ *dclk_freq = dmi_mem_clk_speed;
+ } else {
+ /* Otherwise we don't have a valid speed */
+ *dclk_freq = -1;
+ }
+ } else if (*dclk_freq > 0 &&
+ *dclk_freq != dmi_mem_clk_speed) {
+ /*
+ * If we have a speed, check that all DIMMS are the same
+ * speed, otherwise set the speed as invalid.
+ */
+ *dclk_freq = -1;
+ }
+ }
+}
+
+/*
+ * The default DCLK frequency is used as a fallback if we
+ * fail to find anything reliable in the DMI. The value
+ * is taken straight from the datasheet.
+ */
+#define DEFAULT_DCLK_FREQ 800
+
+static int get_dclk_freq(void)
+{
+ int dclk_freq = 0;
+
+ dmi_walk(decode_dclk, (void *)&dclk_freq);
+
+ if (dclk_freq < 1)
+ return DEFAULT_DCLK_FREQ;
+
+ return dclk_freq;
+}
+
+/*
+ * set_sdram_scrub_rate This routine sets byte/sec bandwidth scrub rate
+ * to hardware according to SCRUBINTERVAL formula
+ * found in datasheet.
+ */
+static int set_sdram_scrub_rate(struct mem_ctl_info *mci, u32 new_bw)
+{
+ struct i7core_pvt *pvt = mci->pvt_info;
+ struct pci_dev *pdev;
+ u32 dw_scrub;
+ u32 dw_ssr;
+
+ /* Get data from the MC register, function 2 */
+ pdev = pvt->pci_mcr[2];
+ if (!pdev)
+ return -ENODEV;
+
+ pci_read_config_dword(pdev, MC_SCRUB_CONTROL, &dw_scrub);
+
+ if (new_bw == 0) {
+ /* Prepare to disable petrol scrub */
+ dw_scrub &= ~STARTSCRUB;
+ /* Stop the patrol scrub engine */
+ write_and_test(pdev, MC_SCRUB_CONTROL,
+ dw_scrub & ~SCRUBINTERVAL_MASK);
+
+ /* Get current status of scrub rate and set bit to disable */
+ pci_read_config_dword(pdev, MC_SSRCONTROL, &dw_ssr);
+ dw_ssr &= ~SSR_MODE_MASK;
+ dw_ssr |= SSR_MODE_DISABLE;
+ } else {
+ const int cache_line_size = 64;
+ const u32 freq_dclk_mhz = pvt->dclk_freq;
+ unsigned long long scrub_interval;
+ /*
+ * Translate the desired scrub rate to a register value and
+ * program the corresponding register value.
+ */
+ scrub_interval = (unsigned long long)freq_dclk_mhz *
+ cache_line_size * 1000000;
+ do_div(scrub_interval, new_bw);
+
+ if (!scrub_interval || scrub_interval > SCRUBINTERVAL_MASK)
+ return -EINVAL;
+
+ dw_scrub = SCRUBINTERVAL_MASK & scrub_interval;
+
+ /* Start the patrol scrub engine */
+ pci_write_config_dword(pdev, MC_SCRUB_CONTROL,
+ STARTSCRUB | dw_scrub);
+
+ /* Get current status of scrub rate and set bit to enable */
+ pci_read_config_dword(pdev, MC_SSRCONTROL, &dw_ssr);
+ dw_ssr &= ~SSR_MODE_MASK;
+ dw_ssr |= SSR_MODE_ENABLE;
+ }
+ /* Disable or enable scrubbing */
+ pci_write_config_dword(pdev, MC_SSRCONTROL, dw_ssr);
+
+ return new_bw;
+}
+
+/*
+ * get_sdram_scrub_rate This routine convert current scrub rate value
+ * into byte/sec bandwidth accourding to
+ * SCRUBINTERVAL formula found in datasheet.
+ */
+static int get_sdram_scrub_rate(struct mem_ctl_info *mci)
+{
+ struct i7core_pvt *pvt = mci->pvt_info;
+ struct pci_dev *pdev;
+ const u32 cache_line_size = 64;
+ const u32 freq_dclk_mhz = pvt->dclk_freq;
+ unsigned long long scrub_rate;
+ u32 scrubval;
+
+ /* Get data from the MC register, function 2 */
+ pdev = pvt->pci_mcr[2];
+ if (!pdev)
+ return -ENODEV;
+
+ /* Get current scrub control data */
+ pci_read_config_dword(pdev, MC_SCRUB_CONTROL, &scrubval);
+
+ /* Mask highest 8-bits to 0 */
+ scrubval &= SCRUBINTERVAL_MASK;
+ if (!scrubval)
+ return 0;
+
+ /* Calculate scrub rate value into byte/sec bandwidth */
+ scrub_rate = (unsigned long long)freq_dclk_mhz *
+ 1000000 * cache_line_size;
+ do_div(scrub_rate, scrubval);
+ return (int)scrub_rate;
+}
+
+static void enable_sdram_scrub_setting(struct mem_ctl_info *mci)
+{
+ struct i7core_pvt *pvt = mci->pvt_info;
+ u32 pci_lock;
+
+ /* Unlock writes to pci registers */
+ pci_read_config_dword(pvt->pci_noncore, MC_CFG_CONTROL, &pci_lock);
+ pci_lock &= ~0x3;
+ pci_write_config_dword(pvt->pci_noncore, MC_CFG_CONTROL,
+ pci_lock | MC_CFG_UNLOCK);
+
+ mci->set_sdram_scrub_rate = set_sdram_scrub_rate;
+ mci->get_sdram_scrub_rate = get_sdram_scrub_rate;
+}
+
+static void disable_sdram_scrub_setting(struct mem_ctl_info *mci)
+{
+ struct i7core_pvt *pvt = mci->pvt_info;
+ u32 pci_lock;
+
+ /* Lock writes to pci registers */
+ pci_read_config_dword(pvt->pci_noncore, MC_CFG_CONTROL, &pci_lock);
+ pci_lock &= ~0x3;
+ pci_write_config_dword(pvt->pci_noncore, MC_CFG_CONTROL,
+ pci_lock | MC_CFG_LOCK);
}
static void i7core_pci_ctl_create(struct i7core_pvt *pvt)
@@ -1874,7 +2197,8 @@ static void i7core_pci_ctl_create(struct i7core_pvt *pvt)
&pvt->i7core_dev->pdev[0]->dev,
EDAC_MOD_STR);
if (unlikely(!pvt->i7core_pci))
- pr_warn("Unable to setup PCI error report via EDAC\n");
+ i7core_printk(KERN_WARNING,
+ "Unable to setup PCI error report via EDAC\n");
}
static void i7core_pci_ctl_release(struct i7core_pvt *pvt)
@@ -1906,8 +2230,11 @@ static void i7core_unregister_mci(struct i7core_dev *i7core_dev)
debugf0("MC: " __FILE__ ": %s(): mci = %p, dev = %p\n",
__func__, mci, &i7core_dev->pdev[0]->dev);
- /* Disable MCE NMI handler */
- edac_mce_unregister(&pvt->edac_mce);
+ /* Disable scrubrate setting */
+ if (pvt->enable_scrub)
+ disable_sdram_scrub_setting(mci);
+
+ atomic_notifier_chain_unregister(&x86_mce_decoder_chain, &i7_mce_dec);
/* Disable EDAC polling */
i7core_pci_ctl_release(pvt);
@@ -1979,6 +2306,10 @@ static int i7core_register_mci(struct i7core_dev *i7core_dev)
/* Set the function pointer to an actual operation function */
mci->edac_check = i7core_check_error;
+ /* Enable scrubrate setting */
+ if (pvt->enable_scrub)
+ enable_sdram_scrub_setting(mci);
+
/* add this new MC control structure to EDAC's list of MCs */
if (unlikely(edac_mc_add_mc(mci))) {
debugf0("MC: " __FILE__
@@ -2002,21 +2333,13 @@ static int i7core_register_mci(struct i7core_dev *i7core_dev)
/* allocating generic PCI control info */
i7core_pci_ctl_create(pvt);
- /* Registers on edac_mce in order to receive memory errors */
- pvt->edac_mce.priv = mci;
- pvt->edac_mce.check_error = i7core_mce_check_error;
- rc = edac_mce_register(&pvt->edac_mce);
- if (unlikely(rc < 0)) {
- debugf0("MC: " __FILE__
- ": %s(): failed edac_mce_register()\n", __func__);
- goto fail1;
- }
+ /* DCLK for scrub rate setting */
+ pvt->dclk_freq = get_dclk_freq();
+
+ atomic_notifier_chain_register(&x86_mce_decoder_chain, &i7_mce_dec);
return 0;
-fail1:
- i7core_pci_ctl_release(pvt);
- edac_mc_del_mc(mci->dev);
fail0:
kfree(mci->ctl_name);
edac_mc_free(mci);
@@ -2035,7 +2358,7 @@ fail0:
static int __devinit i7core_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
- int rc;
+ int rc, count = 0;
struct i7core_dev *i7core_dev;
/* get the pci devices we want to reserve for our use */
@@ -2055,12 +2378,28 @@ static int __devinit i7core_probe(struct pci_dev *pdev,
goto fail0;
list_for_each_entry(i7core_dev, &i7core_edac_list, list) {
+ count++;
rc = i7core_register_mci(i7core_dev);
if (unlikely(rc < 0))
goto fail1;
}
- i7core_printk(KERN_INFO, "Driver loaded.\n");
+ /*
+ * Nehalem-EX uses a different memory controller. However, as the
+ * memory controller is not visible on some Nehalem/Nehalem-EP, we
+ * need to indirectly probe via a X58 PCI device. The same devices
+ * are found on (some) Nehalem-EX. So, on those machines, the
+ * probe routine needs to return -ENODEV, as the actual Memory
+ * Controller registers won't be detected.
+ */
+ if (!count) {
+ rc = -ENODEV;
+ goto fail1;
+ }
+
+ i7core_printk(KERN_INFO,
+ "Driver loaded, %d memory controller(s) found.\n",
+ count);
mutex_unlock(&i7core_edac_lock);
return 0;
diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c
new file mode 100644
index 000000000000..7a402bfbee7d
--- /dev/null
+++ b/drivers/edac/sb_edac.c
@@ -0,0 +1,1893 @@
+/* Intel Sandy Bridge -EN/-EP/-EX Memory Controller kernel module
+ *
+ * This driver supports the memory controllers found on the Intel
+ * processor family Sandy Bridge.
+ *
+ * This file may be distributed under the terms of the
+ * GNU General Public License version 2 only.
+ *
+ * Copyright (c) 2011 by:
+ * Mauro Carvalho Chehab <mchehab@redhat.com>
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/pci_ids.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/edac.h>
+#include <linux/mmzone.h>
+#include <linux/smp.h>
+#include <linux/bitmap.h>
+#include <asm/processor.h>
+#include <asm/mce.h>
+
+#include "edac_core.h"
+
+/* Static vars */
+static LIST_HEAD(sbridge_edac_list);
+static DEFINE_MUTEX(sbridge_edac_lock);
+static int probed;
+
+/*
+ * Alter this version for the module when modifications are made
+ */
+#define SBRIDGE_REVISION " Ver: 1.0.0 "
+#define EDAC_MOD_STR "sbridge_edac"
+
+/*
+ * Debug macros
+ */
+#define sbridge_printk(level, fmt, arg...) \
+ edac_printk(level, "sbridge", fmt, ##arg)
+
+#define sbridge_mc_printk(mci, level, fmt, arg...) \
+ edac_mc_chipset_printk(mci, level, "sbridge", fmt, ##arg)
+
+/*
+ * Get a bit field at register value <v>, from bit <lo> to bit <hi>
+ */
+#define GET_BITFIELD(v, lo, hi) \
+ (((v) & ((1ULL << ((hi) - (lo) + 1)) - 1) << (lo)) >> (lo))
+
+/*
+ * sbridge Memory Controller Registers
+ */
+
+/*
+ * FIXME: For now, let's order by device function, as it makes
+ * easier for driver's development proccess. This table should be
+ * moved to pci_id.h when submitted upstream
+ */
+#define PCI_DEVICE_ID_INTEL_SBRIDGE_SAD0 0x3cf4 /* 12.6 */
+#define PCI_DEVICE_ID_INTEL_SBRIDGE_SAD1 0x3cf6 /* 12.7 */
+#define PCI_DEVICE_ID_INTEL_SBRIDGE_BR 0x3cf5 /* 13.6 */
+#define PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_HA0 0x3ca0 /* 14.0 */
+#define PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TA 0x3ca8 /* 15.0 */
+#define PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_RAS 0x3c71 /* 15.1 */
+#define PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD0 0x3caa /* 15.2 */
+#define PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD1 0x3cab /* 15.3 */
+#define PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD2 0x3cac /* 15.4 */
+#define PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD3 0x3cad /* 15.5 */
+#define PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_DDRIO 0x3cb8 /* 17.0 */
+
+ /*
+ * Currently, unused, but will be needed in the future
+ * implementations, as they hold the error counters
+ */
+#define PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_ERR0 0x3c72 /* 16.2 */
+#define PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_ERR1 0x3c73 /* 16.3 */
+#define PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_ERR2 0x3c76 /* 16.6 */
+#define PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_ERR3 0x3c77 /* 16.7 */
+
+/* Devices 12 Function 6, Offsets 0x80 to 0xcc */
+static const u32 dram_rule[] = {
+ 0x80, 0x88, 0x90, 0x98, 0xa0,
+ 0xa8, 0xb0, 0xb8, 0xc0, 0xc8,
+};
+#define MAX_SAD ARRAY_SIZE(dram_rule)
+
+#define SAD_LIMIT(reg) ((GET_BITFIELD(reg, 6, 25) << 26) | 0x3ffffff)
+#define DRAM_ATTR(reg) GET_BITFIELD(reg, 2, 3)
+#define INTERLEAVE_MODE(reg) GET_BITFIELD(reg, 1, 1)
+#define DRAM_RULE_ENABLE(reg) GET_BITFIELD(reg, 0, 0)
+
+static char *get_dram_attr(u32 reg)
+{
+ switch(DRAM_ATTR(reg)) {
+ case 0:
+ return "DRAM";
+ case 1:
+ return "MMCFG";
+ case 2:
+ return "NXM";
+ default:
+ return "unknown";
+ }
+}
+
+static const u32 interleave_list[] = {
+ 0x84, 0x8c, 0x94, 0x9c, 0xa4,
+ 0xac, 0xb4, 0xbc, 0xc4, 0xcc,
+};
+#define MAX_INTERLEAVE ARRAY_SIZE(interleave_list)
+
+#define SAD_PKG0(reg) GET_BITFIELD(reg, 0, 2)
+#define SAD_PKG1(reg) GET_BITFIELD(reg, 3, 5)
+#define SAD_PKG2(reg) GET_BITFIELD(reg, 8, 10)
+#define SAD_PKG3(reg) GET_BITFIELD(reg, 11, 13)
+#define SAD_PKG4(reg) GET_BITFIELD(reg, 16, 18)
+#define SAD_PKG5(reg) GET_BITFIELD(reg, 19, 21)
+#define SAD_PKG6(reg) GET_BITFIELD(reg, 24, 26)
+#define SAD_PKG7(reg) GET_BITFIELD(reg, 27, 29)
+
+static inline int sad_pkg(u32 reg, int interleave)
+{
+ switch (interleave) {
+ case 0:
+ return SAD_PKG0(reg);
+ case 1:
+ return SAD_PKG1(reg);
+ case 2:
+ return SAD_PKG2(reg);
+ case 3:
+ return SAD_PKG3(reg);
+ case 4:
+ return SAD_PKG4(reg);
+ case 5:
+ return SAD_PKG5(reg);
+ case 6:
+ return SAD_PKG6(reg);
+ case 7:
+ return SAD_PKG7(reg);
+ default:
+ return -EINVAL;
+ }
+}
+
+/* Devices 12 Function 7 */
+
+#define TOLM 0x80
+#define TOHM 0x84
+
+#define GET_TOLM(reg) ((GET_BITFIELD(reg, 0, 3) << 28) | 0x3ffffff)
+#define GET_TOHM(reg) ((GET_BITFIELD(reg, 0, 20) << 25) | 0x3ffffff)
+
+/* Device 13 Function 6 */
+
+#define SAD_TARGET 0xf0
+
+#define SOURCE_ID(reg) GET_BITFIELD(reg, 9, 11)
+
+#define SAD_CONTROL 0xf4
+
+#define NODE_ID(reg) GET_BITFIELD(reg, 0, 2)
+
+/* Device 14 function 0 */
+
+static const u32 tad_dram_rule[] = {
+ 0x40, 0x44, 0x48, 0x4c,
+ 0x50, 0x54, 0x58, 0x5c,
+ 0x60, 0x64, 0x68, 0x6c,
+};
+#define MAX_TAD ARRAY_SIZE(tad_dram_rule)
+
+#define TAD_LIMIT(reg) ((GET_BITFIELD(reg, 12, 31) << 26) | 0x3ffffff)
+#define TAD_SOCK(reg) GET_BITFIELD(reg, 10, 11)
+#define TAD_CH(reg) GET_BITFIELD(reg, 8, 9)
+#define TAD_TGT3(reg) GET_BITFIELD(reg, 6, 7)
+#define TAD_TGT2(reg) GET_BITFIELD(reg, 4, 5)
+#define TAD_TGT1(reg) GET_BITFIELD(reg, 2, 3)
+#define TAD_TGT0(reg) GET_BITFIELD(reg, 0, 1)
+
+/* Device 15, function 0 */
+
+#define MCMTR 0x7c
+
+#define IS_ECC_ENABLED(mcmtr) GET_BITFIELD(mcmtr, 2, 2)
+#define IS_LOCKSTEP_ENABLED(mcmtr) GET_BITFIELD(mcmtr, 1, 1)
+#define IS_CLOSE_PG(mcmtr) GET_BITFIELD(mcmtr, 0, 0)
+
+/* Device 15, function 1 */
+
+#define RASENABLES 0xac
+#define IS_MIRROR_ENABLED(reg) GET_BITFIELD(reg, 0, 0)
+
+/* Device 15, functions 2-5 */
+
+static const int mtr_regs[] = {
+ 0x80, 0x84, 0x88,
+};
+
+#define RANK_DISABLE(mtr) GET_BITFIELD(mtr, 16, 19)
+#define IS_DIMM_PRESENT(mtr) GET_BITFIELD(mtr, 14, 14)
+#define RANK_CNT_BITS(mtr) GET_BITFIELD(mtr, 12, 13)
+#define RANK_WIDTH_BITS(mtr) GET_BITFIELD(mtr, 2, 4)
+#define COL_WIDTH_BITS(mtr) GET_BITFIELD(mtr, 0, 1)
+
+static const u32 tad_ch_nilv_offset[] = {
+ 0x90, 0x94, 0x98, 0x9c,
+ 0xa0, 0xa4, 0xa8, 0xac,
+ 0xb0, 0xb4, 0xb8, 0xbc,
+};
+#define CHN_IDX_OFFSET(reg) GET_BITFIELD(reg, 28, 29)
+#define TAD_OFFSET(reg) (GET_BITFIELD(reg, 6, 25) << 26)
+
+static const u32 rir_way_limit[] = {
+ 0x108, 0x10c, 0x110, 0x114, 0x118,
+};
+#define MAX_RIR_RANGES ARRAY_SIZE(rir_way_limit)
+
+#define IS_RIR_VALID(reg) GET_BITFIELD(reg, 31, 31)
+#define RIR_WAY(reg) GET_BITFIELD(reg, 28, 29)
+#define RIR_LIMIT(reg) ((GET_BITFIELD(reg, 1, 10) << 29)| 0x1fffffff)
+
+#define MAX_RIR_WAY 8
+
+static const u32 rir_offset[MAX_RIR_RANGES][MAX_RIR_WAY] = {
+ { 0x120, 0x124, 0x128, 0x12c, 0x130, 0x134, 0x138, 0x13c },
+ { 0x140, 0x144, 0x148, 0x14c, 0x150, 0x154, 0x158, 0x15c },
+ { 0x160, 0x164, 0x168, 0x16c, 0x170, 0x174, 0x178, 0x17c },
+ { 0x180, 0x184, 0x188, 0x18c, 0x190, 0x194, 0x198, 0x19c },
+ { 0x1a0, 0x1a4, 0x1a8, 0x1ac, 0x1b0, 0x1b4, 0x1b8, 0x1bc },
+};
+
+#define RIR_RNK_TGT(reg) GET_BITFIELD(reg, 16, 19)
+#define RIR_OFFSET(reg) GET_BITFIELD(reg, 2, 14)
+
+/* Device 16, functions 2-7 */
+
+/*
+ * FIXME: Implement the error count reads directly
+ */
+
+static const u32 correrrcnt[] = {
+ 0x104, 0x108, 0x10c, 0x110,
+};
+
+#define RANK_ODD_OV(reg) GET_BITFIELD(reg, 31, 31)
+#define RANK_ODD_ERR_CNT(reg) GET_BITFIELD(reg, 16, 30)
+#define RANK_EVEN_OV(reg) GET_BITFIELD(reg, 15, 15)
+#define RANK_EVEN_ERR_CNT(reg) GET_BITFIELD(reg, 0, 14)
+
+static const u32 correrrthrsld[] = {
+ 0x11c, 0x120, 0x124, 0x128,
+};
+
+#define RANK_ODD_ERR_THRSLD(reg) GET_BITFIELD(reg, 16, 30)
+#define RANK_EVEN_ERR_THRSLD(reg) GET_BITFIELD(reg, 0, 14)
+
+
+/* Device 17, function 0 */
+
+#define RANK_CFG_A 0x0328
+
+#define IS_RDIMM_ENABLED(reg) GET_BITFIELD(reg, 11, 11)
+
+/*
+ * sbridge structs
+ */
+
+#define NUM_CHANNELS 4
+#define MAX_DIMMS 3 /* Max DIMMS per channel */
+
+struct sbridge_info {
+ u32 mcmtr;
+};
+
+struct sbridge_channel {
+ u32 ranks;
+ u32 dimms;
+};
+
+struct pci_id_descr {
+ int dev;
+ int func;
+ int dev_id;
+ int optional;
+};
+
+struct pci_id_table {
+ const struct pci_id_descr *descr;
+ int n_devs;
+};
+
+struct sbridge_dev {
+ struct list_head list;
+ u8 bus, mc;
+ u8 node_id, source_id;
+ struct pci_dev **pdev;
+ int n_devs;
+ struct mem_ctl_info *mci;
+};
+
+struct sbridge_pvt {
+ struct pci_dev *pci_ta, *pci_ddrio, *pci_ras;
+ struct pci_dev *pci_sad0, *pci_sad1, *pci_ha0;
+ struct pci_dev *pci_br;
+ struct pci_dev *pci_tad[NUM_CHANNELS];
+
+ struct sbridge_dev *sbridge_dev;
+
+ struct sbridge_info info;
+ struct sbridge_channel channel[NUM_CHANNELS];
+
+ int csrow_map[NUM_CHANNELS][MAX_DIMMS];
+
+ /* Memory type detection */
+ bool is_mirrored, is_lockstep, is_close_pg;
+
+ /* Fifo double buffers */
+ struct mce mce_entry[MCE_LOG_LEN];
+ struct mce mce_outentry[MCE_LOG_LEN];
+
+ /* Fifo in/out counters */
+ unsigned mce_in, mce_out;
+
+ /* Count indicator to show errors not got */
+ unsigned mce_overrun;
+
+ /* Memory description */
+ u64 tolm, tohm;
+};
+
+#define PCI_DESCR(device, function, device_id) \
+ .dev = (device), \
+ .func = (function), \
+ .dev_id = (device_id)
+
+static const struct pci_id_descr pci_dev_descr_sbridge[] = {
+ /* Processor Home Agent */
+ { PCI_DESCR(14, 0, PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_HA0) },
+
+ /* Memory controller */
+ { PCI_DESCR(15, 0, PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TA) },
+ { PCI_DESCR(15, 1, PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_RAS) },
+ { PCI_DESCR(15, 2, PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD0) },
+ { PCI_DESCR(15, 3, PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD1) },
+ { PCI_DESCR(15, 4, PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD2) },
+ { PCI_DESCR(15, 5, PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD3) },
+ { PCI_DESCR(17, 0, PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_DDRIO) },
+
+ /* System Address Decoder */
+ { PCI_DESCR(12, 6, PCI_DEVICE_ID_INTEL_SBRIDGE_SAD0) },
+ { PCI_DESCR(12, 7, PCI_DEVICE_ID_INTEL_SBRIDGE_SAD1) },
+
+ /* Broadcast Registers */
+ { PCI_DESCR(13, 6, PCI_DEVICE_ID_INTEL_SBRIDGE_BR) },
+};
+
+#define PCI_ID_TABLE_ENTRY(A) { .descr=A, .n_devs = ARRAY_SIZE(A) }
+static const struct pci_id_table pci_dev_descr_sbridge_table[] = {
+ PCI_ID_TABLE_ENTRY(pci_dev_descr_sbridge),
+ {0,} /* 0 terminated list. */
+};
+
+/*
+ * pci_device_id table for which devices we are looking for
+ */
+static const struct pci_device_id sbridge_pci_tbl[] __devinitdata = {
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TA)},
+ {0,} /* 0 terminated list. */
+};
+
+
+/****************************************************************************
+ Anciliary status routines
+ ****************************************************************************/
+
+static inline int numrank(u32 mtr)
+{
+ int ranks = (1 << RANK_CNT_BITS(mtr));
+
+ if (ranks > 4) {
+ debugf0("Invalid number of ranks: %d (max = 4) raw value = %x (%04x)",
+ ranks, (unsigned int)RANK_CNT_BITS(mtr), mtr);
+ return -EINVAL;
+ }
+
+ return ranks;
+}
+
+static inline int numrow(u32 mtr)
+{
+ int rows = (RANK_WIDTH_BITS(mtr) + 12);
+
+ if (rows < 13 || rows > 18) {
+ debugf0("Invalid number of rows: %d (should be between 14 and 17) raw value = %x (%04x)",
+ rows, (unsigned int)RANK_WIDTH_BITS(mtr), mtr);
+ return -EINVAL;
+ }
+
+ return 1 << rows;
+}
+
+static inline int numcol(u32 mtr)
+{
+ int cols = (COL_WIDTH_BITS(mtr) + 10);
+
+ if (cols > 12) {
+ debugf0("Invalid number of cols: %d (max = 4) raw value = %x (%04x)",
+ cols, (unsigned int)COL_WIDTH_BITS(mtr), mtr);
+ return -EINVAL;
+ }
+
+ return 1 << cols;
+}
+
+static struct sbridge_dev *get_sbridge_dev(u8 bus)
+{
+ struct sbridge_dev *sbridge_dev;
+
+ list_for_each_entry(sbridge_dev, &sbridge_edac_list, list) {
+ if (sbridge_dev->bus == bus)
+ return sbridge_dev;
+ }
+
+ return NULL;
+}
+
+static struct sbridge_dev *alloc_sbridge_dev(u8 bus,
+ const struct pci_id_table *table)
+{
+ struct sbridge_dev *sbridge_dev;
+
+ sbridge_dev = kzalloc(sizeof(*sbridge_dev), GFP_KERNEL);
+ if (!sbridge_dev)
+ return NULL;
+
+ sbridge_dev->pdev = kzalloc(sizeof(*sbridge_dev->pdev) * table->n_devs,
+ GFP_KERNEL);
+ if (!sbridge_dev->pdev) {
+ kfree(sbridge_dev);
+ return NULL;
+ }
+
+ sbridge_dev->bus = bus;
+ sbridge_dev->n_devs = table->n_devs;
+ list_add_tail(&sbridge_dev->list, &sbridge_edac_list);
+
+ return sbridge_dev;
+}
+
+static void free_sbridge_dev(struct sbridge_dev *sbridge_dev)
+{
+ list_del(&sbridge_dev->list);
+ kfree(sbridge_dev->pdev);
+ kfree(sbridge_dev);
+}
+
+/****************************************************************************
+ Memory check routines
+ ****************************************************************************/
+static struct pci_dev *get_pdev_slot_func(u8 bus, unsigned slot,
+ unsigned func)
+{
+ struct sbridge_dev *sbridge_dev = get_sbridge_dev(bus);
+ int i;
+
+ if (!sbridge_dev)
+ return NULL;
+
+ for (i = 0; i < sbridge_dev->n_devs; i++) {
+ if (!sbridge_dev->pdev[i])
+ continue;
+
+ if (PCI_SLOT(sbridge_dev->pdev[i]->devfn) == slot &&
+ PCI_FUNC(sbridge_dev->pdev[i]->devfn) == func) {
+ debugf1("Associated %02x.%02x.%d with %p\n",
+ bus, slot, func, sbridge_dev->pdev[i]);
+ return sbridge_dev->pdev[i];
+ }
+ }
+
+ return NULL;
+}
+
+/**
+ * sbridge_get_active_channels() - gets the number of channels and csrows
+ * bus: Device bus
+ * @channels: Number of channels that will be returned
+ * @csrows: Number of csrows found
+ *
+ * Since EDAC core needs to know in advance the number of available channels
+ * and csrows, in order to allocate memory for csrows/channels, it is needed
+ * to run two similar steps. At the first step, implemented on this function,
+ * it checks the number of csrows/channels present at one socket, identified
+ * by the associated PCI bus.
+ * this is used in order to properly allocate the size of mci components.
+ * Note: one csrow is one dimm.
+ */
+static int sbridge_get_active_channels(const u8 bus, unsigned *channels,
+ unsigned *csrows)
+{
+ struct pci_dev *pdev = NULL;
+ int i, j;
+ u32 mcmtr;
+
+ *channels = 0;
+ *csrows = 0;
+
+ pdev = get_pdev_slot_func(bus, 15, 0);
+ if (!pdev) {
+ sbridge_printk(KERN_ERR, "Couldn't find PCI device "
+ "%2x.%02d.%d!!!\n",
+ bus, 15, 0);
+ return -ENODEV;
+ }
+
+ pci_read_config_dword(pdev, MCMTR, &mcmtr);
+ if (!IS_ECC_ENABLED(mcmtr)) {
+ sbridge_printk(KERN_ERR, "ECC is disabled. Aborting\n");
+ return -ENODEV;
+ }
+
+ for (i = 0; i < NUM_CHANNELS; i++) {
+ u32 mtr;
+
+ /* Device 15 functions 2 - 5 */
+ pdev = get_pdev_slot_func(bus, 15, 2 + i);
+ if (!pdev) {
+ sbridge_printk(KERN_ERR, "Couldn't find PCI device "
+ "%2x.%02d.%d!!!\n",
+ bus, 15, 2 + i);
+ return -ENODEV;
+ }
+ (*channels)++;
+
+ for (j = 0; j < ARRAY_SIZE(mtr_regs); j++) {
+ pci_read_config_dword(pdev, mtr_regs[j], &mtr);
+ debugf1("Bus#%02x channel #%d MTR%d = %x\n", bus, i, j, mtr);
+ if (IS_DIMM_PRESENT(mtr))
+ (*csrows)++;
+ }
+ }
+
+ debugf0("Number of active channels: %d, number of active dimms: %d\n",
+ *channels, *csrows);
+
+ return 0;
+}
+
+static int get_dimm_config(const struct mem_ctl_info *mci)
+{
+ struct sbridge_pvt *pvt = mci->pvt_info;
+ struct csrow_info *csr;
+ int i, j, banks, ranks, rows, cols, size, npages;
+ int csrow = 0;
+ unsigned long last_page = 0;
+ u32 reg;
+ enum edac_type mode;
+ enum mem_type mtype;
+
+ pci_read_config_dword(pvt->pci_br, SAD_TARGET, &reg);
+ pvt->sbridge_dev->source_id = SOURCE_ID(reg);
+
+ pci_read_config_dword(pvt->pci_br, SAD_CONTROL, &reg);
+ pvt->sbridge_dev->node_id = NODE_ID(reg);
+ debugf0("mc#%d: Node ID: %d, source ID: %d\n",
+ pvt->sbridge_dev->mc,
+ pvt->sbridge_dev->node_id,
+ pvt->sbridge_dev->source_id);
+
+ pci_read_config_dword(pvt->pci_ras, RASENABLES, &reg);
+ if (IS_MIRROR_ENABLED(reg)) {
+ debugf0("Memory mirror is enabled\n");
+ pvt->is_mirrored = true;
+ } else {
+ debugf0("Memory mirror is disabled\n");
+ pvt->is_mirrored = false;
+ }
+
+ pci_read_config_dword(pvt->pci_ta, MCMTR, &pvt->info.mcmtr);
+ if (IS_LOCKSTEP_ENABLED(pvt->info.mcmtr)) {
+ debugf0("Lockstep is enabled\n");
+ mode = EDAC_S8ECD8ED;
+ pvt->is_lockstep = true;
+ } else {
+ debugf0("Lockstep is disabled\n");
+ mode = EDAC_S4ECD4ED;
+ pvt->is_lockstep = false;
+ }
+ if (IS_CLOSE_PG(pvt->info.mcmtr)) {
+ debugf0("address map is on closed page mode\n");
+ pvt->is_close_pg = true;
+ } else {
+ debugf0("address map is on open page mode\n");
+ pvt->is_close_pg = false;
+ }
+
+ pci_read_config_dword(pvt->pci_ta, RANK_CFG_A, &reg);
+ if (IS_RDIMM_ENABLED(reg)) {
+ /* FIXME: Can also be LRDIMM */
+ debugf0("Memory is registered\n");
+ mtype = MEM_RDDR3;
+ } else {
+ debugf0("Memory is unregistered\n");
+ mtype = MEM_DDR3;
+ }
+
+ /* On all supported DDR3 DIMM types, there are 8 banks available */
+ banks = 8;
+
+ for (i = 0; i < NUM_CHANNELS; i++) {
+ u32 mtr;
+
+ for (j = 0; j < ARRAY_SIZE(mtr_regs); j++) {
+ pci_read_config_dword(pvt->pci_tad[i],
+ mtr_regs[j], &mtr);
+ debugf4("Channel #%d MTR%d = %x\n", i, j, mtr);
+ if (IS_DIMM_PRESENT(mtr)) {
+ pvt->channel[i].dimms++;
+
+ ranks = numrank(mtr);
+ rows = numrow(mtr);
+ cols = numcol(mtr);
+
+ /* DDR3 has 8 I/O banks */
+ size = (rows * cols * banks * ranks) >> (20 - 3);
+ npages = MiB_TO_PAGES(size);
+
+ debugf0("mc#%d: channel %d, dimm %d, %d Mb (%d pages) bank: %d, rank: %d, row: %#x, col: %#x\n",
+ pvt->sbridge_dev->mc, i, j,
+ size, npages,
+ banks, ranks, rows, cols);
+ csr = &mci->csrows[csrow];
+
+ csr->first_page = last_page;
+ csr->last_page = last_page + npages - 1;
+ csr->page_mask = 0UL; /* Unused */
+ csr->nr_pages = npages;
+ csr->grain = 32;
+ csr->csrow_idx = csrow;
+ csr->dtype = (banks == 8) ? DEV_X8 : DEV_X4;
+ csr->ce_count = 0;
+ csr->ue_count = 0;
+ csr->mtype = mtype;
+ csr->edac_mode = mode;
+ csr->nr_channels = 1;
+ csr->channels[0].chan_idx = i;
+ csr->channels[0].ce_count = 0;
+ pvt->csrow_map[i][j] = csrow;
+ snprintf(csr->channels[0].label,
+ sizeof(csr->channels[0].label),
+ "CPU_SrcID#%u_Channel#%u_DIMM#%u",
+ pvt->sbridge_dev->source_id, i, j);
+ last_page += npages;
+ csrow++;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static void get_memory_layout(const struct mem_ctl_info *mci)
+{
+ struct sbridge_pvt *pvt = mci->pvt_info;
+ int i, j, k, n_sads, n_tads, sad_interl;
+ u32 reg;
+ u64 limit, prv = 0;
+ u64 tmp_mb;
+ u32 rir_way;
+
+ /*
+ * Step 1) Get TOLM/TOHM ranges
+ */
+
+ /* Address range is 32:28 */
+ pci_read_config_dword(pvt->pci_sad1, TOLM,
+ &reg);
+ pvt->tolm = GET_TOLM(reg);
+ tmp_mb = (1 + pvt->tolm) >> 20;
+
+ debugf0("TOLM: %Lu.%03Lu GB (0x%016Lx)\n",
+ tmp_mb / 1000, tmp_mb % 1000, (u64)pvt->tolm);
+
+ /* Address range is already 45:25 */
+ pci_read_config_dword(pvt->pci_sad1, TOHM,
+ &reg);
+ pvt->tohm = GET_TOHM(reg);
+ tmp_mb = (1 + pvt->tohm) >> 20;
+
+ debugf0("TOHM: %Lu.%03Lu GB (0x%016Lx)",
+ tmp_mb / 1000, tmp_mb % 1000, (u64)pvt->tohm);
+
+ /*
+ * Step 2) Get SAD range and SAD Interleave list
+ * TAD registers contain the interleave wayness. However, it
+ * seems simpler to just discover it indirectly, with the
+ * algorithm bellow.
+ */
+ prv = 0;
+ for (n_sads = 0; n_sads < MAX_SAD; n_sads++) {
+ /* SAD_LIMIT Address range is 45:26 */
+ pci_read_config_dword(pvt->pci_sad0, dram_rule[n_sads],
+ &reg);
+ limit = SAD_LIMIT(reg);
+
+ if (!DRAM_RULE_ENABLE(reg))
+ continue;
+
+ if (limit <= prv)
+ break;
+
+ tmp_mb = (limit + 1) >> 20;
+ debugf0("SAD#%d %s up to %Lu.%03Lu GB (0x%016Lx) %s reg=0x%08x\n",
+ n_sads,
+ get_dram_attr(reg),
+ tmp_mb / 1000, tmp_mb % 1000,
+ ((u64)tmp_mb) << 20L,
+ INTERLEAVE_MODE(reg) ? "Interleave: 8:6" : "Interleave: [8:6]XOR[18:16]",
+ reg);
+ prv = limit;
+
+ pci_read_config_dword(pvt->pci_sad0, interleave_list[n_sads],
+ &reg);
+ sad_interl = sad_pkg(reg, 0);
+ for (j = 0; j < 8; j++) {
+ if (j > 0 && sad_interl == sad_pkg(reg, j))
+ break;
+
+ debugf0("SAD#%d, interleave #%d: %d\n",
+ n_sads, j, sad_pkg(reg, j));
+ }
+ }
+
+ /*
+ * Step 3) Get TAD range
+ */
+ prv = 0;
+ for (n_tads = 0; n_tads < MAX_TAD; n_tads++) {
+ pci_read_config_dword(pvt->pci_ha0, tad_dram_rule[n_tads],
+ &reg);
+ limit = TAD_LIMIT(reg);
+ if (limit <= prv)
+ break;
+ tmp_mb = (limit + 1) >> 20;
+
+ debugf0("TAD#%d: up to %Lu.%03Lu GB (0x%016Lx), socket interleave %d, memory interleave %d, TGT: %d, %d, %d, %d, reg=0x%08x\n",
+ n_tads, tmp_mb / 1000, tmp_mb % 1000,
+ ((u64)tmp_mb) << 20L,
+ (u32)TAD_SOCK(reg),
+ (u32)TAD_CH(reg),
+ (u32)TAD_TGT0(reg),
+ (u32)TAD_TGT1(reg),
+ (u32)TAD_TGT2(reg),
+ (u32)TAD_TGT3(reg),
+ reg);
+ prv = tmp_mb;
+ }
+
+ /*
+ * Step 4) Get TAD offsets, per each channel
+ */
+ for (i = 0; i < NUM_CHANNELS; i++) {
+ if (!pvt->channel[i].dimms)
+ continue;
+ for (j = 0; j < n_tads; j++) {
+ pci_read_config_dword(pvt->pci_tad[i],
+ tad_ch_nilv_offset[j],
+ &reg);
+ tmp_mb = TAD_OFFSET(reg) >> 20;
+ debugf0("TAD CH#%d, offset #%d: %Lu.%03Lu GB (0x%016Lx), reg=0x%08x\n",
+ i, j,
+ tmp_mb / 1000, tmp_mb % 1000,
+ ((u64)tmp_mb) << 20L,
+ reg);
+ }
+ }
+
+ /*
+ * Step 6) Get RIR Wayness/Limit, per each channel
+ */
+ for (i = 0; i < NUM_CHANNELS; i++) {
+ if (!pvt->channel[i].dimms)
+ continue;
+ for (j = 0; j < MAX_RIR_RANGES; j++) {
+ pci_read_config_dword(pvt->pci_tad[i],
+ rir_way_limit[j],
+ &reg);
+
+ if (!IS_RIR_VALID(reg))
+ continue;
+
+ tmp_mb = RIR_LIMIT(reg) >> 20;
+ rir_way = 1 << RIR_WAY(reg);
+ debugf0("CH#%d RIR#%d, limit: %Lu.%03Lu GB (0x%016Lx), way: %d, reg=0x%08x\n",
+ i, j,
+ tmp_mb / 1000, tmp_mb % 1000,
+ ((u64)tmp_mb) << 20L,
+ rir_way,
+ reg);
+
+ for (k = 0; k < rir_way; k++) {
+ pci_read_config_dword(pvt->pci_tad[i],
+ rir_offset[j][k],
+ &reg);
+ tmp_mb = RIR_OFFSET(reg) << 6;
+
+ debugf0("CH#%d RIR#%d INTL#%d, offset %Lu.%03Lu GB (0x%016Lx), tgt: %d, reg=0x%08x\n",
+ i, j, k,
+ tmp_mb / 1000, tmp_mb % 1000,
+ ((u64)tmp_mb) << 20L,
+ (u32)RIR_RNK_TGT(reg),
+ reg);
+ }
+ }
+ }
+}
+
+struct mem_ctl_info *get_mci_for_node_id(u8 node_id)
+{
+ struct sbridge_dev *sbridge_dev;
+
+ list_for_each_entry(sbridge_dev, &sbridge_edac_list, list) {
+ if (sbridge_dev->node_id == node_id)
+ return sbridge_dev->mci;
+ }
+ return NULL;
+}
+
+static int get_memory_error_data(struct mem_ctl_info *mci,
+ u64 addr,
+ u8 *socket,
+ long *channel_mask,
+ u8 *rank,
+ char *area_type)
+{
+ struct mem_ctl_info *new_mci;
+ struct sbridge_pvt *pvt = mci->pvt_info;
+ char msg[256];
+ int n_rir, n_sads, n_tads, sad_way, sck_xch;
+ int sad_interl, idx, base_ch;
+ int interleave_mode;
+ unsigned sad_interleave[MAX_INTERLEAVE];
+ u32 reg;
+ u8 ch_way,sck_way;
+ u32 tad_offset;
+ u32 rir_way;
+ u64 ch_addr, offset, limit, prv = 0;
+
+
+ /*
+ * Step 0) Check if the address is at special memory ranges
+ * The check bellow is probably enough to fill all cases where
+ * the error is not inside a memory, except for the legacy
+ * range (e. g. VGA addresses). It is unlikely, however, that the
+ * memory controller would generate an error on that range.
+ */
+ if ((addr > (u64) pvt->tolm) && (addr < (1L << 32))) {
+ sprintf(msg, "Error at TOLM area, on addr 0x%08Lx", addr);
+ edac_mc_handle_ce_no_info(mci, msg);
+ return -EINVAL;
+ }
+ if (addr >= (u64)pvt->tohm) {
+ sprintf(msg, "Error at MMIOH area, on addr 0x%016Lx", addr);
+ edac_mc_handle_ce_no_info(mci, msg);
+ return -EINVAL;
+ }
+
+ /*
+ * Step 1) Get socket
+ */
+ for (n_sads = 0; n_sads < MAX_SAD; n_sads++) {
+ pci_read_config_dword(pvt->pci_sad0, dram_rule[n_sads],
+ &reg);
+
+ if (!DRAM_RULE_ENABLE(reg))
+ continue;
+
+ limit = SAD_LIMIT(reg);
+ if (limit <= prv) {
+ sprintf(msg, "Can't discover the memory socket");
+ edac_mc_handle_ce_no_info(mci, msg);
+ return -EINVAL;
+ }
+ if (addr <= limit)
+ break;
+ prv = limit;
+ }
+ if (n_sads == MAX_SAD) {
+ sprintf(msg, "Can't discover the memory socket");
+ edac_mc_handle_ce_no_info(mci, msg);
+ return -EINVAL;
+ }
+ area_type = get_dram_attr(reg);
+ interleave_mode = INTERLEAVE_MODE(reg);
+
+ pci_read_config_dword(pvt->pci_sad0, interleave_list[n_sads],
+ &reg);
+ sad_interl = sad_pkg(reg, 0);
+ for (sad_way = 0; sad_way < 8; sad_way++) {
+ if (sad_way > 0 && sad_interl == sad_pkg(reg, sad_way))
+ break;
+ sad_interleave[sad_way] = sad_pkg(reg, sad_way);
+ debugf0("SAD interleave #%d: %d\n",
+ sad_way, sad_interleave[sad_way]);
+ }
+ debugf0("mc#%d: Error detected on SAD#%d: address 0x%016Lx < 0x%016Lx, Interleave [%d:6]%s\n",
+ pvt->sbridge_dev->mc,
+ n_sads,
+ addr,
+ limit,
+ sad_way + 7,
+ INTERLEAVE_MODE(reg) ? "" : "XOR[18:16]");
+ if (interleave_mode)
+ idx = ((addr >> 6) ^ (addr >> 16)) & 7;
+ else
+ idx = (addr >> 6) & 7;
+ switch (sad_way) {
+ case 1:
+ idx = 0;
+ break;
+ case 2:
+ idx = idx & 1;
+ break;
+ case 4:
+ idx = idx & 3;
+ break;
+ case 8:
+ break;
+ default:
+ sprintf(msg, "Can't discover socket interleave");
+ edac_mc_handle_ce_no_info(mci, msg);
+ return -EINVAL;
+ }
+ *socket = sad_interleave[idx];
+ debugf0("SAD interleave index: %d (wayness %d) = CPU socket %d\n",
+ idx, sad_way, *socket);
+
+ /*
+ * Move to the proper node structure, in order to access the
+ * right PCI registers
+ */
+ new_mci = get_mci_for_node_id(*socket);
+ if (!new_mci) {
+ sprintf(msg, "Struct for socket #%u wasn't initialized",
+ *socket);
+ edac_mc_handle_ce_no_info(mci, msg);
+ return -EINVAL;
+ }
+ mci = new_mci;
+ pvt = mci->pvt_info;
+
+ /*
+ * Step 2) Get memory channel
+ */
+ prv = 0;
+ for (n_tads = 0; n_tads < MAX_TAD; n_tads++) {
+ pci_read_config_dword(pvt->pci_ha0, tad_dram_rule[n_tads],
+ &reg);
+ limit = TAD_LIMIT(reg);
+ if (limit <= prv) {
+ sprintf(msg, "Can't discover the memory channel");
+ edac_mc_handle_ce_no_info(mci, msg);
+ return -EINVAL;
+ }
+ if (addr <= limit)
+ break;
+ prv = limit;
+ }
+ ch_way = TAD_CH(reg) + 1;
+ sck_way = TAD_SOCK(reg) + 1;
+ /*
+ * FIXME: Is it right to always use channel 0 for offsets?
+ */
+ pci_read_config_dword(pvt->pci_tad[0],
+ tad_ch_nilv_offset[n_tads],
+ &tad_offset);
+
+ if (ch_way == 3)
+ idx = addr >> 6;
+ else
+ idx = addr >> (6 + sck_way);
+ idx = idx % ch_way;
+
+ /*
+ * FIXME: Shouldn't we use CHN_IDX_OFFSET() here, when ch_way == 3 ???
+ */
+ switch (idx) {
+ case 0:
+ base_ch = TAD_TGT0(reg);
+ break;
+ case 1:
+ base_ch = TAD_TGT1(reg);
+ break;
+ case 2:
+ base_ch = TAD_TGT2(reg);
+ break;
+ case 3:
+ base_ch = TAD_TGT3(reg);
+ break;
+ default:
+ sprintf(msg, "Can't discover the TAD target");
+ edac_mc_handle_ce_no_info(mci, msg);
+ return -EINVAL;
+ }
+ *channel_mask = 1 << base_ch;
+
+ if (pvt->is_mirrored) {
+ *channel_mask |= 1 << ((base_ch + 2) % 4);
+ switch(ch_way) {
+ case 2:
+ case 4:
+ sck_xch = 1 << sck_way * (ch_way >> 1);
+ break;
+ default:
+ sprintf(msg, "Invalid mirror set. Can't decode addr");
+ edac_mc_handle_ce_no_info(mci, msg);
+ return -EINVAL;
+ }
+ } else
+ sck_xch = (1 << sck_way) * ch_way;
+
+ if (pvt->is_lockstep)
+ *channel_mask |= 1 << ((base_ch + 1) % 4);
+
+ offset = TAD_OFFSET(tad_offset);
+
+ debugf0("TAD#%d: address 0x%016Lx < 0x%016Lx, socket interleave %d, channel interleave %d (offset 0x%08Lx), index %d, base ch: %d, ch mask: 0x%02lx\n",
+ n_tads,
+ addr,
+ limit,
+ (u32)TAD_SOCK(reg),
+ ch_way,
+ offset,
+ idx,
+ base_ch,
+ *channel_mask);
+
+ /* Calculate channel address */
+ /* Remove the TAD offset */
+
+ if (offset > addr) {
+ sprintf(msg, "Can't calculate ch addr: TAD offset 0x%08Lx is too high for addr 0x%08Lx!",
+ offset, addr);
+ edac_mc_handle_ce_no_info(mci, msg);
+ return -EINVAL;
+ }
+ addr -= offset;
+ /* Store the low bits [0:6] of the addr */
+ ch_addr = addr & 0x7f;
+ /* Remove socket wayness and remove 6 bits */
+ addr >>= 6;
+ addr /= sck_xch;
+#if 0
+ /* Divide by channel way */
+ addr = addr / ch_way;
+#endif
+ /* Recover the last 6 bits */
+ ch_addr |= addr << 6;
+
+ /*
+ * Step 3) Decode rank
+ */
+ for (n_rir = 0; n_rir < MAX_RIR_RANGES; n_rir++) {
+ pci_read_config_dword(pvt->pci_tad[base_ch],
+ rir_way_limit[n_rir],
+ &reg);
+
+ if (!IS_RIR_VALID(reg))
+ continue;
+
+ limit = RIR_LIMIT(reg);
+
+ debugf0("RIR#%d, limit: %Lu.%03Lu GB (0x%016Lx), way: %d\n",
+ n_rir,
+ (limit >> 20) / 1000, (limit >> 20) % 1000,
+ limit,
+ 1 << RIR_WAY(reg));
+ if (ch_addr <= limit)
+ break;
+ }
+ if (n_rir == MAX_RIR_RANGES) {
+ sprintf(msg, "Can't discover the memory rank for ch addr 0x%08Lx",
+ ch_addr);
+ edac_mc_handle_ce_no_info(mci, msg);
+ return -EINVAL;
+ }
+ rir_way = RIR_WAY(reg);
+ if (pvt->is_close_pg)
+ idx = (ch_addr >> 6);
+ else
+ idx = (ch_addr >> 13); /* FIXME: Datasheet says to shift by 15 */
+ idx %= 1 << rir_way;
+
+ pci_read_config_dword(pvt->pci_tad[base_ch],
+ rir_offset[n_rir][idx],
+ &reg);
+ *rank = RIR_RNK_TGT(reg);
+
+ debugf0("RIR#%d: channel address 0x%08Lx < 0x%08Lx, RIR interleave %d, index %d\n",
+ n_rir,
+ ch_addr,
+ limit,
+ rir_way,
+ idx);
+
+ return 0;
+}
+
+/****************************************************************************
+ Device initialization routines: put/get, init/exit
+ ****************************************************************************/
+
+/*
+ * sbridge_put_all_devices 'put' all the devices that we have
+ * reserved via 'get'
+ */
+static void sbridge_put_devices(struct sbridge_dev *sbridge_dev)
+{
+ int i;
+
+ debugf0(__FILE__ ": %s()\n", __func__);
+ for (i = 0; i < sbridge_dev->n_devs; i++) {
+ struct pci_dev *pdev = sbridge_dev->pdev[i];
+ if (!pdev)
+ continue;
+ debugf0("Removing dev %02x:%02x.%d\n",
+ pdev->bus->number,
+ PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
+ pci_dev_put(pdev);
+ }
+}
+
+static void sbridge_put_all_devices(void)
+{
+ struct sbridge_dev *sbridge_dev, *tmp;
+
+ list_for_each_entry_safe(sbridge_dev, tmp, &sbridge_edac_list, list) {
+ sbridge_put_devices(sbridge_dev);
+ free_sbridge_dev(sbridge_dev);
+ }
+}
+
+/*
+ * sbridge_get_all_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 sbridge_get_onedevice(struct pci_dev **prev,
+ u8 *num_mc,
+ const struct pci_id_table *table,
+ const unsigned devno)
+{
+ struct sbridge_dev *sbridge_dev;
+ const struct pci_id_descr *dev_descr = &table->descr[devno];
+
+ struct pci_dev *pdev = NULL;
+ u8 bus = 0;
+
+ sbridge_printk(KERN_INFO,
+ "Seeking for: dev %02x.%d PCI ID %04x:%04x\n",
+ dev_descr->dev, dev_descr->func,
+ PCI_VENDOR_ID_INTEL, dev_descr->dev_id);
+
+ pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
+ dev_descr->dev_id, *prev);
+
+ if (!pdev) {
+ if (*prev) {
+ *prev = pdev;
+ return 0;
+ }
+
+ if (dev_descr->optional)
+ return 0;
+
+ if (devno == 0)
+ return -ENODEV;
+
+ sbridge_printk(KERN_INFO,
+ "Device not found: dev %02x.%d PCI ID %04x:%04x\n",
+ dev_descr->dev, dev_descr->func,
+ PCI_VENDOR_ID_INTEL, dev_descr->dev_id);
+
+ /* End of list, leave */
+ return -ENODEV;
+ }
+ bus = pdev->bus->number;
+
+ sbridge_dev = get_sbridge_dev(bus);
+ if (!sbridge_dev) {
+ sbridge_dev = alloc_sbridge_dev(bus, table);
+ if (!sbridge_dev) {
+ pci_dev_put(pdev);
+ return -ENOMEM;
+ }
+ (*num_mc)++;
+ }
+
+ if (sbridge_dev->pdev[devno]) {
+ sbridge_printk(KERN_ERR,
+ "Duplicated device for "
+ "dev %02x:%d.%d PCI ID %04x:%04x\n",
+ bus, dev_descr->dev, dev_descr->func,
+ PCI_VENDOR_ID_INTEL, dev_descr->dev_id);
+ pci_dev_put(pdev);
+ return -ENODEV;
+ }
+
+ sbridge_dev->pdev[devno] = pdev;
+
+ /* Sanity check */
+ if (unlikely(PCI_SLOT(pdev->devfn) != dev_descr->dev ||
+ PCI_FUNC(pdev->devfn) != dev_descr->func)) {
+ sbridge_printk(KERN_ERR,
+ "Device PCI ID %04x:%04x "
+ "has dev %02x:%d.%d instead of dev %02x:%02x.%d\n",
+ PCI_VENDOR_ID_INTEL, dev_descr->dev_id,
+ bus, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn),
+ bus, dev_descr->dev, dev_descr->func);
+ return -ENODEV;
+ }
+
+ /* Be sure that the device is enabled */
+ if (unlikely(pci_enable_device(pdev) < 0)) {
+ sbridge_printk(KERN_ERR,
+ "Couldn't enable "
+ "dev %02x:%d.%d PCI ID %04x:%04x\n",
+ bus, dev_descr->dev, dev_descr->func,
+ PCI_VENDOR_ID_INTEL, dev_descr->dev_id);
+ return -ENODEV;
+ }
+
+ debugf0("Detected dev %02x:%d.%d PCI ID %04x:%04x\n",
+ bus, dev_descr->dev,
+ dev_descr->func,
+ PCI_VENDOR_ID_INTEL, dev_descr->dev_id);
+
+ /*
+ * As stated on drivers/pci/search.c, the reference count for
+ * @from is always decremented if it is not %NULL. So, as we need
+ * to get all devices up to null, we need to do a get for the device
+ */
+ pci_dev_get(pdev);
+
+ *prev = pdev;
+
+ return 0;
+}
+
+static int sbridge_get_all_devices(u8 *num_mc)
+{
+ int i, rc;
+ struct pci_dev *pdev = NULL;
+ const struct pci_id_table *table = pci_dev_descr_sbridge_table;
+
+ while (table && table->descr) {
+ for (i = 0; i < table->n_devs; i++) {
+ pdev = NULL;
+ do {
+ rc = sbridge_get_onedevice(&pdev, num_mc,
+ table, i);
+ if (rc < 0) {
+ if (i == 0) {
+ i = table->n_devs;
+ break;
+ }
+ sbridge_put_all_devices();
+ return -ENODEV;
+ }
+ } while (pdev);
+ }
+ table++;
+ }
+
+ return 0;
+}
+
+static int mci_bind_devs(struct mem_ctl_info *mci,
+ struct sbridge_dev *sbridge_dev)
+{
+ struct sbridge_pvt *pvt = mci->pvt_info;
+ struct pci_dev *pdev;
+ int i, func, slot;
+
+ for (i = 0; i < sbridge_dev->n_devs; i++) {
+ pdev = sbridge_dev->pdev[i];
+ if (!pdev)
+ continue;
+ slot = PCI_SLOT(pdev->devfn);
+ func = PCI_FUNC(pdev->devfn);
+ switch (slot) {
+ case 12:
+ switch (func) {
+ case 6:
+ pvt->pci_sad0 = pdev;
+ break;
+ case 7:
+ pvt->pci_sad1 = pdev;
+ break;
+ default:
+ goto error;
+ }
+ break;
+ case 13:
+ switch (func) {
+ case 6:
+ pvt->pci_br = pdev;
+ break;
+ default:
+ goto error;
+ }
+ break;
+ case 14:
+ switch (func) {
+ case 0:
+ pvt->pci_ha0 = pdev;
+ break;
+ default:
+ goto error;
+ }
+ break;
+ case 15:
+ switch (func) {
+ case 0:
+ pvt->pci_ta = pdev;
+ break;
+ case 1:
+ pvt->pci_ras = pdev;
+ break;
+ case 2:
+ case 3:
+ case 4:
+ case 5:
+ pvt->pci_tad[func - 2] = pdev;
+ break;
+ default:
+ goto error;
+ }
+ break;
+ case 17:
+ switch (func) {
+ case 0:
+ pvt->pci_ddrio = pdev;
+ break;
+ default:
+ goto error;
+ }
+ break;
+ default:
+ goto error;
+ }
+
+ debugf0("Associated PCI %02x.%02d.%d with dev = %p\n",
+ sbridge_dev->bus,
+ PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn),
+ pdev);
+ }
+
+ /* Check if everything were registered */
+ if (!pvt->pci_sad0 || !pvt->pci_sad1 || !pvt->pci_ha0 ||
+ !pvt-> pci_tad || !pvt->pci_ras || !pvt->pci_ta ||
+ !pvt->pci_ddrio)
+ goto enodev;
+
+ for (i = 0; i < NUM_CHANNELS; i++) {
+ if (!pvt->pci_tad[i])
+ goto enodev;
+ }
+ return 0;
+
+enodev:
+ sbridge_printk(KERN_ERR, "Some needed devices are missing\n");
+ return -ENODEV;
+
+error:
+ sbridge_printk(KERN_ERR, "Device %d, function %d "
+ "is out of the expected range\n",
+ slot, func);
+ return -EINVAL;
+}
+
+/****************************************************************************
+ Error check routines
+ ****************************************************************************/
+
+/*
+ * While Sandy Bridge has error count registers, SMI BIOS read values from
+ * and resets the counters. So, they are not reliable for the OS to read
+ * from them. So, we have no option but to just trust on whatever MCE is
+ * telling us about the errors.
+ */
+static void sbridge_mce_output_error(struct mem_ctl_info *mci,
+ const struct mce *m)
+{
+ struct mem_ctl_info *new_mci;
+ struct sbridge_pvt *pvt = mci->pvt_info;
+ char *type, *optype, *msg, *recoverable_msg;
+ bool ripv = GET_BITFIELD(m->mcgstatus, 0, 0);
+ bool overflow = GET_BITFIELD(m->status, 62, 62);
+ bool uncorrected_error = GET_BITFIELD(m->status, 61, 61);
+ bool recoverable = GET_BITFIELD(m->status, 56, 56);
+ u32 core_err_cnt = GET_BITFIELD(m->status, 38, 52);
+ u32 mscod = GET_BITFIELD(m->status, 16, 31);
+ u32 errcode = GET_BITFIELD(m->status, 0, 15);
+ u32 channel = GET_BITFIELD(m->status, 0, 3);
+ u32 optypenum = GET_BITFIELD(m->status, 4, 6);
+ long channel_mask, first_channel;
+ u8 rank, socket;
+ int csrow, rc, dimm;
+ char *area_type = "Unknown";
+
+ if (ripv)
+ type = "NON_FATAL";
+ else
+ type = "FATAL";
+
+ /*
+ * According with Table 15-9 of the Intel Archictecture spec vol 3A,
+ * memory errors should fit in this mask:
+ * 000f 0000 1mmm cccc (binary)
+ * where:
+ * f = Correction Report Filtering Bit. If 1, subsequent errors
+ * won't be shown
+ * mmm = error type
+ * cccc = channel
+ * If the mask doesn't match, report an error to the parsing logic
+ */
+ if (! ((errcode & 0xef80) == 0x80)) {
+ optype = "Can't parse: it is not a mem";
+ } else {
+ switch (optypenum) {
+ case 0:
+ optype = "generic undef request";
+ break;
+ case 1:
+ optype = "memory read";
+ break;
+ case 2:
+ optype = "memory write";
+ break;
+ case 3:
+ optype = "addr/cmd";
+ break;
+ case 4:
+ optype = "memory scrubbing";
+ break;
+ default:
+ optype = "reserved";
+ break;
+ }
+ }
+
+ rc = get_memory_error_data(mci, m->addr, &socket,
+ &channel_mask, &rank, area_type);
+ if (rc < 0)
+ return;
+ new_mci = get_mci_for_node_id(socket);
+ if (!new_mci) {
+ edac_mc_handle_ce_no_info(mci, "Error: socket got corrupted!");
+ return;
+ }
+ mci = new_mci;
+ pvt = mci->pvt_info;
+
+ first_channel = find_first_bit(&channel_mask, NUM_CHANNELS);
+
+ if (rank < 4)
+ dimm = 0;
+ else if (rank < 8)
+ dimm = 1;
+ else
+ dimm = 2;
+
+ csrow = pvt->csrow_map[first_channel][dimm];
+
+ if (uncorrected_error && recoverable)
+ recoverable_msg = " recoverable";
+ else
+ recoverable_msg = "";
+
+ /*
+ * FIXME: What should we do with "channel" information on mcelog?
+ * Probably, we can just discard it, as the channel information
+ * comes from the get_memory_error_data() address decoding
+ */
+ msg = kasprintf(GFP_ATOMIC,
+ "%d %s error(s): %s on %s area %s%s: cpu=%d Err=%04x:%04x (ch=%d), "
+ "addr = 0x%08llx => socket=%d, Channel=%ld(mask=%ld), rank=%d\n",
+ core_err_cnt,
+ area_type,
+ optype,
+ type,
+ recoverable_msg,
+ overflow ? "OVERFLOW" : "",
+ m->cpu,
+ mscod, errcode,
+ channel, /* 1111b means not specified */
+ (long long) m->addr,
+ socket,
+ first_channel, /* This is the real channel on SB */
+ channel_mask,
+ rank);
+
+ debugf0("%s", msg);
+
+ /* Call the helper to output message */
+ if (uncorrected_error)
+ edac_mc_handle_fbd_ue(mci, csrow, 0, 0, msg);
+ else
+ edac_mc_handle_fbd_ce(mci, csrow, 0, msg);
+
+ kfree(msg);
+}
+
+/*
+ * sbridge_check_error Retrieve and process errors reported by the
+ * hardware. Called by the Core module.
+ */
+static void sbridge_check_error(struct mem_ctl_info *mci)
+{
+ struct sbridge_pvt *pvt = mci->pvt_info;
+ int i;
+ unsigned count = 0;
+ struct mce *m;
+
+ /*
+ * MCE first step: Copy all mce errors into a temporary buffer
+ * We use a double buffering here, to reduce the risk of
+ * loosing an error.
+ */
+ smp_rmb();
+ count = (pvt->mce_out + MCE_LOG_LEN - pvt->mce_in)
+ % MCE_LOG_LEN;
+ if (!count)
+ return;
+
+ m = pvt->mce_outentry;
+ if (pvt->mce_in + count > MCE_LOG_LEN) {
+ unsigned l = MCE_LOG_LEN - pvt->mce_in;
+
+ memcpy(m, &pvt->mce_entry[pvt->mce_in], sizeof(*m) * l);
+ smp_wmb();
+ pvt->mce_in = 0;
+ count -= l;
+ m += l;
+ }
+ memcpy(m, &pvt->mce_entry[pvt->mce_in], sizeof(*m) * count);
+ smp_wmb();
+ pvt->mce_in += count;
+
+ smp_rmb();
+ if (pvt->mce_overrun) {
+ sbridge_printk(KERN_ERR, "Lost %d memory errors\n",
+ pvt->mce_overrun);
+ smp_wmb();
+ pvt->mce_overrun = 0;
+ }
+
+ /*
+ * MCE second step: parse errors and display
+ */
+ for (i = 0; i < count; i++)
+ sbridge_mce_output_error(mci, &pvt->mce_outentry[i]);
+}
+
+/*
+ * sbridge_mce_check_error Replicates mcelog routine to get errors
+ * This routine simply queues mcelog errors, and
+ * return. The error itself should be handled later
+ * by sbridge_check_error.
+ * WARNING: As this routine should be called at NMI time, extra care should
+ * be taken to avoid deadlocks, and to be as fast as possible.
+ */
+static int sbridge_mce_check_error(struct notifier_block *nb, unsigned long val,
+ void *data)
+{
+ struct mce *mce = (struct mce *)data;
+ struct mem_ctl_info *mci;
+ struct sbridge_pvt *pvt;
+
+ mci = get_mci_for_node_id(mce->socketid);
+ if (!mci)
+ return NOTIFY_BAD;
+ pvt = mci->pvt_info;
+
+ /*
+ * Just let mcelog handle it if the error is
+ * outside the memory controller. A memory error
+ * is indicated by bit 7 = 1 and bits = 8-11,13-15 = 0.
+ * bit 12 has an special meaning.
+ */
+ if ((mce->status & 0xefff) >> 7 != 1)
+ return NOTIFY_DONE;
+
+ printk("sbridge: HANDLING MCE MEMORY ERROR\n");
+
+ printk("CPU %d: Machine Check Exception: %Lx Bank %d: %016Lx\n",
+ mce->extcpu, mce->mcgstatus, mce->bank, mce->status);
+ printk("TSC %llx ", mce->tsc);
+ printk("ADDR %llx ", mce->addr);
+ printk("MISC %llx ", mce->misc);
+
+ printk("PROCESSOR %u:%x TIME %llu SOCKET %u APIC %x\n",
+ mce->cpuvendor, mce->cpuid, mce->time,
+ mce->socketid, mce->apicid);
+
+#ifdef CONFIG_SMP
+ /* Only handle if it is the right mc controller */
+ if (cpu_data(mce->cpu).phys_proc_id != pvt->sbridge_dev->mc)
+ return NOTIFY_DONE;
+#endif
+
+ smp_rmb();
+ if ((pvt->mce_out + 1) % MCE_LOG_LEN == pvt->mce_in) {
+ smp_wmb();
+ pvt->mce_overrun++;
+ return NOTIFY_DONE;
+ }
+
+ /* Copy memory error at the ringbuffer */
+ memcpy(&pvt->mce_entry[pvt->mce_out], mce, sizeof(*mce));
+ smp_wmb();
+ pvt->mce_out = (pvt->mce_out + 1) % MCE_LOG_LEN;
+
+ /* Handle fatal errors immediately */
+ if (mce->mcgstatus & 1)
+ sbridge_check_error(mci);
+
+ /* Advice mcelog that the error were handled */
+ return NOTIFY_STOP;
+}
+
+static struct notifier_block sbridge_mce_dec = {
+ .notifier_call = sbridge_mce_check_error,
+};
+
+/****************************************************************************
+ EDAC register/unregister logic
+ ****************************************************************************/
+
+static void sbridge_unregister_mci(struct sbridge_dev *sbridge_dev)
+{
+ struct mem_ctl_info *mci = sbridge_dev->mci;
+ struct sbridge_pvt *pvt;
+
+ if (unlikely(!mci || !mci->pvt_info)) {
+ debugf0("MC: " __FILE__ ": %s(): dev = %p\n",
+ __func__, &sbridge_dev->pdev[0]->dev);
+
+ sbridge_printk(KERN_ERR, "Couldn't find mci handler\n");
+ return;
+ }
+
+ pvt = mci->pvt_info;
+
+ debugf0("MC: " __FILE__ ": %s(): mci = %p, dev = %p\n",
+ __func__, mci, &sbridge_dev->pdev[0]->dev);
+
+ atomic_notifier_chain_unregister(&x86_mce_decoder_chain,
+ &sbridge_mce_dec);
+
+ /* Remove MC sysfs nodes */
+ edac_mc_del_mc(mci->dev);
+
+ debugf1("%s: free mci struct\n", mci->ctl_name);
+ kfree(mci->ctl_name);
+ edac_mc_free(mci);
+ sbridge_dev->mci = NULL;
+}
+
+static int sbridge_register_mci(struct sbridge_dev *sbridge_dev)
+{
+ struct mem_ctl_info *mci;
+ struct sbridge_pvt *pvt;
+ int rc, channels, csrows;
+
+ /* Check the number of active and not disabled channels */
+ rc = sbridge_get_active_channels(sbridge_dev->bus, &channels, &csrows);
+ if (unlikely(rc < 0))
+ return rc;
+
+ /* allocate a new MC control structure */
+ mci = edac_mc_alloc(sizeof(*pvt), csrows, channels, sbridge_dev->mc);
+ if (unlikely(!mci))
+ return -ENOMEM;
+
+ debugf0("MC: " __FILE__ ": %s(): mci = %p, dev = %p\n",
+ __func__, mci, &sbridge_dev->pdev[0]->dev);
+
+ pvt = mci->pvt_info;
+ memset(pvt, 0, sizeof(*pvt));
+
+ /* Associate sbridge_dev and mci for future usage */
+ pvt->sbridge_dev = sbridge_dev;
+ sbridge_dev->mci = mci;
+
+ mci->mtype_cap = MEM_FLAG_DDR3;
+ mci->edac_ctl_cap = EDAC_FLAG_NONE;
+ mci->edac_cap = EDAC_FLAG_NONE;
+ mci->mod_name = "sbridge_edac.c";
+ mci->mod_ver = SBRIDGE_REVISION;
+ mci->ctl_name = kasprintf(GFP_KERNEL, "Sandy Bridge Socket#%d", mci->mc_idx);
+ mci->dev_name = pci_name(sbridge_dev->pdev[0]);
+ mci->ctl_page_to_phys = NULL;
+
+ /* Set the function pointer to an actual operation function */
+ mci->edac_check = sbridge_check_error;
+
+ /* Store pci devices at mci for faster access */
+ rc = mci_bind_devs(mci, sbridge_dev);
+ if (unlikely(rc < 0))
+ goto fail0;
+
+ /* Get dimm basic config and the memory layout */
+ get_dimm_config(mci);
+ get_memory_layout(mci);
+
+ /* record ptr to the generic device */
+ mci->dev = &sbridge_dev->pdev[0]->dev;
+
+ /* add this new MC control structure to EDAC's list of MCs */
+ if (unlikely(edac_mc_add_mc(mci))) {
+ debugf0("MC: " __FILE__
+ ": %s(): failed edac_mc_add_mc()\n", __func__);
+ rc = -EINVAL;
+ goto fail0;
+ }
+
+ atomic_notifier_chain_register(&x86_mce_decoder_chain,
+ &sbridge_mce_dec);
+ return 0;
+
+fail0:
+ kfree(mci->ctl_name);
+ edac_mc_free(mci);
+ sbridge_dev->mci = NULL;
+ return rc;
+}
+
+/*
+ * sbridge_probe Probe for ONE instance of device to see if it is
+ * present.
+ * return:
+ * 0 for FOUND a device
+ * < 0 for error code
+ */
+
+static int __devinit sbridge_probe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ int rc;
+ u8 mc, num_mc = 0;
+ struct sbridge_dev *sbridge_dev;
+
+ /* get the pci devices we want to reserve for our use */
+ mutex_lock(&sbridge_edac_lock);
+
+ /*
+ * All memory controllers are allocated at the first pass.
+ */
+ if (unlikely(probed >= 1)) {
+ mutex_unlock(&sbridge_edac_lock);
+ return -ENODEV;
+ }
+ probed++;
+
+ rc = sbridge_get_all_devices(&num_mc);
+ if (unlikely(rc < 0))
+ goto fail0;
+ mc = 0;
+
+ list_for_each_entry(sbridge_dev, &sbridge_edac_list, list) {
+ debugf0("Registering MC#%d (%d of %d)\n", mc, mc + 1, num_mc);
+ sbridge_dev->mc = mc++;
+ rc = sbridge_register_mci(sbridge_dev);
+ if (unlikely(rc < 0))
+ goto fail1;
+ }
+
+ sbridge_printk(KERN_INFO, "Driver loaded.\n");
+
+ mutex_unlock(&sbridge_edac_lock);
+ return 0;
+
+fail1:
+ list_for_each_entry(sbridge_dev, &sbridge_edac_list, list)
+ sbridge_unregister_mci(sbridge_dev);
+
+ sbridge_put_all_devices();
+fail0:
+ mutex_unlock(&sbridge_edac_lock);
+ return rc;
+}
+
+/*
+ * sbridge_remove destructor for one instance of device
+ *
+ */
+static void __devexit sbridge_remove(struct pci_dev *pdev)
+{
+ struct sbridge_dev *sbridge_dev;
+
+ debugf0(__FILE__ ": %s()\n", __func__);
+
+ /*
+ * we have a trouble here: pdev value for removal will be wrong, since
+ * it will point to the X58 register used to detect that the machine
+ * is a Nehalem or upper design. However, due to the way several PCI
+ * devices are grouped together to provide MC functionality, we need
+ * to use a different method for releasing the devices
+ */
+
+ mutex_lock(&sbridge_edac_lock);
+
+ if (unlikely(!probed)) {
+ mutex_unlock(&sbridge_edac_lock);
+ return;
+ }
+
+ list_for_each_entry(sbridge_dev, &sbridge_edac_list, list)
+ sbridge_unregister_mci(sbridge_dev);
+
+ /* Release PCI resources */
+ sbridge_put_all_devices();
+
+ probed--;
+
+ mutex_unlock(&sbridge_edac_lock);
+}
+
+MODULE_DEVICE_TABLE(pci, sbridge_pci_tbl);
+
+/*
+ * sbridge_driver pci_driver structure for this module
+ *
+ */
+static struct pci_driver sbridge_driver = {
+ .name = "sbridge_edac",
+ .probe = sbridge_probe,
+ .remove = __devexit_p(sbridge_remove),
+ .id_table = sbridge_pci_tbl,
+};
+
+/*
+ * sbridge_init Module entry function
+ * Try to initialize this module for its devices
+ */
+static int __init sbridge_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(&sbridge_driver);
+
+ if (pci_rc >= 0)
+ return 0;
+
+ sbridge_printk(KERN_ERR, "Failed to register device with error %d.\n",
+ pci_rc);
+
+ return pci_rc;
+}
+
+/*
+ * sbridge_exit() Module exit function
+ * Unregister the driver
+ */
+static void __exit sbridge_exit(void)
+{
+ debugf2("MC: " __FILE__ ": %s()\n", __func__);
+ pci_unregister_driver(&sbridge_driver);
+}
+
+module_init(sbridge_init);
+module_exit(sbridge_exit);
+
+module_param(edac_op_state, int, 0444);
+MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");
+
+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 Sandy Bridge memory controllers - "
+ SBRIDGE_REVISION);
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-11 12:09:15 +0300