to generate parity. Some vendors do not do this, and thus the parity bit
can "float" giving false positives.
-The PCI Parity EDAC device has the ability to "skip" known flaky
-cards during the parity scan. These are set by the parity "blacklist"
-interface in the sysfs for PCI Parity. (See the PCI section in the sysfs
-section below.) There is also a parity "whitelist" which is used as
-an explicit list of devices to scan, while the blacklist is a list
-of devices to skip.
+[There are patches in the kernel queue which will allow for storage of
+quirks of PCI devices reporting false parity positives. The 2.6.18
+kernel should have those patches included. When that becomes available,
+then EDAC will be patched to utilize that information to "skip" such
+devices.]
-EDAC will have future error detectors that will be added or integrated
-into EDAC in the following list:
+EDAC will have future error detectors that will be integrated with
+EDAC or added to it, in the following list:
MCE Machine Check Exception
MCA Machine Check Architecture
there currently reside 2 'edac' components:
mc memory controller(s) system
- pci PCI status system
+ pci PCI control and status system
============================================================================
Memory Controller (mc) Model
First a background on the memory controller's model abstracted in EDAC.
-Each mc device controls a set of DIMM memory modules. These modules are
+Each 'mc' device controls a set of DIMM memory modules. These modules are
laid out in a Chip-Select Row (csrowX) and Channel table (chX). There can
-be multiple csrows and two channels.
+be multiple csrows and multiple channels.
Memory controllers allow for several csrows, with 8 csrows being a typical value.
Yet, the actual number of csrows depends on the electrical "loading"
of a given motherboard, memory controller and DIMM characteristics.
Dual channels allows for 128 bit data transfers to the CPU from memory.
+Some newer chipsets allow for more than 2 channels, like Fully Buffered DIMMs
+(FB-DIMMs). The following example will assume 2 channels:
Channel 0 Channel 1
The time period, in milliseconds, for polling for error information.
Too small a value wastes resources. Too large a value might delay
necessary handling of errors and might loose valuable information for
- locating the error. 1000 milliseconds (once each second) is about
- right for most uses.
+ locating the error. 1000 milliseconds (once each second) is the current
+ default. Systems which require all the bandwidth they can get, may
+ increase this.
LOAD TIME: module/kernel parameter: poll_msec=[0|1]
RUN TIME: echo "1000" >/sys/devices/system/edac/mc/poll_msec
-Module Version read-only attribute file:
-
- 'mc_version'
-
- The EDAC CORE module's version and compile date are shown here to
- indicate what EDAC is running.
-
-
-
============================================================================
'mcX' DIRECTORIES
-DIMM capability attribute file:
-
- 'edac_capability'
-
- The EDAC (Error Detection and Correction) capabilities/modes of
- the memory controller hardware.
-
-
-DIMM Current Capability attribute file:
-
- 'edac_current_capability'
-
- The EDAC capabilities available with the hardware
- configuration. This may not be the same as "EDAC capability"
- if the correct memory is not used. If a memory controller is
- capable of EDAC, but DIMMs without check bits are in use, then
- Parity, SECDED, S4ECD4ED capabilities will not be available
- even though the memory controller might be capable of those
- modes with the proper memory loaded.
-
-
-Memory Type supported on this controller attribute file:
-
- 'supported_mem_type'
-
- This attribute file displays the memory type, usually
- buffered and unbuffered DIMMs.
-
-
Memory Controller name attribute file:
'mc_name'
that is being utilized.
-Memory Controller Module name attribute file:
-
- 'module_name'
-
- This attribute file displays the memory controller module name,
- version and date built. The name of the memory controller
- hardware - some drivers work with multiple controllers and
- this field shows which hardware is present.
-
-
Total memory managed by this memory controller attribute file:
'size_mb'
This attribute file will display what type of memory is currently
on this csrow. Normally, either buffered or unbuffered memory.
+ Examples:
+ Registered-DDR
+ Unbuffered-DDR
EDAC Mode of operation attribute file:
'dev_type'
- This attribute file will display what type of DIMM device is
- being utilized. Example: x4
+ This attribute file will display what type of DRAM device is
+ being utilized on this DIMM.
+ Examples:
+ x1
+ x2
+ x4
+ x8
Channel 0 CE Count attribute file:
If logging for UEs and CEs are enabled then system logs will have
error notices indicating errors that have been detected:
-MC0: CE page 0x283, offset 0xce0, grain 8, syndrome 0x6ec3, row 0,
+EDAC MC0: CE page 0x283, offset 0xce0, grain 8, syndrome 0x6ec3, row 0,
channel 1 "DIMM_B1": amd76x_edac
-MC0: CE page 0x1e5, offset 0xfb0, grain 8, syndrome 0xb741, row 0,
+EDAC MC0: CE page 0x1e5, offset 0xfb0, grain 8, syndrome 0xb741, row 0,
channel 1 "DIMM_B1": amd76x_edac
-PCI Device Whitelist:
-
- 'pci_parity_whitelist'
-
- This control file allows for an explicit list of PCI devices to be
- scanned for parity errors. Only devices found on this list will
- be examined. The list is a line of hexadecimal VENDOR and DEVICE
- ID tuples:
-
- 1022:7450,1434:16a6
-
- One or more can be inserted, separated by a comma.
-
- To write the above list doing the following as one command line:
-
- echo "1022:7450,1434:16a6"
- > /sys/devices/system/edac/pci/pci_parity_whitelist
-
-
-
- To display what the whitelist is, simply 'cat' the same file.
-
-
-PCI Device Blacklist:
-
- 'pci_parity_blacklist'
-
- This control file allows for a list of PCI devices to be
- skipped for scanning.
- The list is a line of hexadecimal VENDOR and DEVICE ID tuples:
-
- 1022:7450,1434:16a6
-
- One or more can be inserted, separated by a comma.
-
- To write the above list doing the following as one command line:
-
- echo "1022:7450,1434:16a6"
- > /sys/devices/system/edac/pci/pci_parity_blacklist
-
-
- To display what the whitelist currently contains,
- simply 'cat' the same file.
-
=======================================================================
-
-PCI Vendor and Devices IDs can be obtained with the lspci command. Using
-the -n option lspci will display the vendor and device IDs. The system
-administrator will have to determine which devices should be scanned or
-skipped.
-
-
-
-The two lists (white and black) are prioritized. blacklist is the lower
-priority and will NOT be utilized when a whitelist has been set.
-Turn OFF a whitelist by an empty echo command:
-
- echo > /sys/devices/system/edac/pci/pci_parity_whitelist
-
-and any previous blacklist will be utilized.
-
/*
* edac_mc kernel module
- * (C) 2005 Linux Networx (http://lnxi.com)
+ * (C) 2005, 2006 Linux Networx (http://lnxi.com)
* This file may be distributed under the terms of the
* GNU General Public License.
*
#include <asm/edac.h>
#include "edac_mc.h"
-#define EDAC_MC_VERSION "Ver: 2.0.0 " __DATE__
+#define EDAC_MC_VERSION "Ver: 2.0.1 " __DATE__
-/* For now, disable the EDAC sysfs code. The sysfs interface that EDAC
- * presents to user space needs more thought, and is likely to change
- * substantially.
- */
-#define DISABLE_EDAC_SYSFS
#ifdef CONFIG_EDAC_DEBUG
/* Values of 0 to 4 will generate output */
static int panic_on_pci_parity; /* default no panic on PCI Parity */
static atomic_t pci_parity_count = ATOMIC_INIT(0);
-/* Structure of the whitelist and blacklist arrays */
-struct edac_pci_device_list {
- unsigned int vendor; /* Vendor ID */
- unsigned int device; /* Deviice ID */
-};
-
-#define MAX_LISTED_PCI_DEVICES 32
-
-/* List of PCI devices (vendor-id:device-id) that should be skipped */
-static struct edac_pci_device_list pci_blacklist[MAX_LISTED_PCI_DEVICES];
-static int pci_blacklist_count;
-
-/* List of PCI devices (vendor-id:device-id) that should be scanned */
-static struct edac_pci_device_list pci_whitelist[MAX_LISTED_PCI_DEVICES];
-static int pci_whitelist_count ;
-
-#ifndef DISABLE_EDAC_SYSFS
static struct kobject edac_pci_kobj; /* /sys/devices/system/edac/pci */
static struct completion edac_pci_kobj_complete;
-#endif /* DISABLE_EDAC_SYSFS */
#endif /* CONFIG_PCI */
/* START sysfs data and methods */
-#ifndef DISABLE_EDAC_SYSFS
static const char *mem_types[] = {
[MEM_EMPTY] = "Empty",
* /sys/devices/system/edac/mc;
* data structures and methods
*/
-#if 0
-static ssize_t memctrl_string_show(void *ptr, char *buffer)
-{
- char *value = (char*) ptr;
- return sprintf(buffer, "%s\n", value);
-}
-#endif
-
static ssize_t memctrl_int_show(void *ptr, char *buffer)
{
int *value = (int*) ptr;
- return sprintf(buffer, "%d\n", *value);
+ return sprintf(buffer, "%u\n", *value);
}
static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count)
.store = _store, \
};
-/* cwrow<id> attribute f*/
-#if 0
-MEMCTRL_STRING_ATTR(mc_version,EDAC_MC_VERSION,S_IRUGO,memctrl_string_show,NULL);
-#endif
-
/* csrow<id> control files */
MEMCTRL_ATTR(panic_on_ue,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
MEMCTRL_ATTR(log_ue,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
.default_attrs = (struct attribute **) memctrl_attr,
};
-#endif /* DISABLE_EDAC_SYSFS */
-
/* Initialize the main sysfs entries for edac:
* /sys/devices/system/edac
*
* !0 FAILURE
*/
static int edac_sysfs_memctrl_setup(void)
-#ifdef DISABLE_EDAC_SYSFS
-{
- return 0;
-}
-#else
{
int err=0;
return err;
}
-#endif /* DISABLE_EDAC_SYSFS */
/*
* MC teardown:
*/
static void edac_sysfs_memctrl_teardown(void)
{
-#ifndef DISABLE_EDAC_SYSFS
debugf0("MC: " __FILE__ ": %s()\n", __func__);
/* Unregister the MC's kobject and wait for reference count to reach
/* Unregister the 'edac' object */
sysdev_class_unregister(&edac_class);
-#endif /* DISABLE_EDAC_SYSFS */
}
#ifdef CONFIG_PCI
-
-#ifndef DISABLE_EDAC_SYSFS
-
-/*
- * /sys/devices/system/edac/pci;
- * data structures and methods
- */
-
-struct list_control {
- struct edac_pci_device_list *list;
- int *count;
-};
-
-#if 0
-/* Output the list as: vendor_id:device:id<,vendor_id:device_id> */
-static ssize_t edac_pci_list_string_show(void *ptr, char *buffer)
-{
- struct list_control *listctl;
- struct edac_pci_device_list *list;
- char *p = buffer;
- int len=0;
- int i;
-
- listctl = ptr;
- list = listctl->list;
-
- for (i = 0; i < *(listctl->count); i++, list++ ) {
- if (len > 0)
- len += snprintf(p + len, (PAGE_SIZE-len), ",");
-
- len += snprintf(p + len,
- (PAGE_SIZE-len),
- "%x:%x",
- list->vendor,list->device);
- }
-
- len += snprintf(p + len,(PAGE_SIZE-len), "\n");
- return (ssize_t) len;
-}
-
-/**
- *
- * Scan string from **s to **e looking for one 'vendor:device' tuple
- * where each field is a hex value
- *
- * return 0 if an entry is NOT found
- * return 1 if an entry is found
- * fill in *vendor_id and *device_id with values found
- *
- * In both cases, make sure *s has been moved forward toward *e
- */
-static int parse_one_device(const char **s,const char **e,
- unsigned int *vendor_id, unsigned int *device_id)
-{
- const char *runner, *p;
-
- /* if null byte, we are done */
- if (!**s) {
- (*s)++; /* keep *s moving */
- return 0;
- }
-
- /* skip over newlines & whitespace */
- if ((**s == '\n') || isspace(**s)) {
- (*s)++;
- return 0;
- }
-
- if (!isxdigit(**s)) {
- (*s)++;
- return 0;
- }
-
- /* parse vendor_id */
- runner = *s;
-
- while (runner < *e) {
- /* scan for vendor:device delimiter */
- if (*runner == ':') {
- *vendor_id = simple_strtol((char*) *s, (char**) &p, 16);
- runner = p + 1;
- break;
- }
-
- runner++;
- }
-
- if (!isxdigit(*runner)) {
- *s = ++runner;
- return 0;
- }
-
- /* parse device_id */
- if (runner < *e) {
- *device_id = simple_strtol((char*)runner, (char**)&p, 16);
- runner = p;
- }
-
- *s = runner;
- return 1;
-}
-
-static ssize_t edac_pci_list_string_store(void *ptr, const char *buffer,
- size_t count)
-{
- struct list_control *listctl;
- struct edac_pci_device_list *list;
- unsigned int vendor_id, device_id;
- const char *s, *e;
- int *index;
-
- s = (char*)buffer;
- e = s + count;
- listctl = ptr;
- list = listctl->list;
- index = listctl->count;
- *index = 0;
-
- while (*index < MAX_LISTED_PCI_DEVICES) {
- if (parse_one_device(&s,&e,&vendor_id,&device_id)) {
- list[ *index ].vendor = vendor_id;
- list[ *index ].device = device_id;
- (*index)++;
- }
-
- /* check for all data consume */
- if (s >= e)
- break;
- }
-
- return count;
-}
-
-#endif
static ssize_t edac_pci_int_show(void *ptr, char *buffer)
{
int *value = ptr;
.store = _store, \
};
-#if 0
-static struct list_control pci_whitelist_control = {
- .list = pci_whitelist,
- .count = &pci_whitelist_count
-};
-
-static struct list_control pci_blacklist_control = {
- .list = pci_blacklist,
- .count = &pci_blacklist_count
-};
-
-/* whitelist attribute */
-EDAC_PCI_STRING_ATTR(pci_parity_whitelist,
- &pci_whitelist_control,
- S_IRUGO|S_IWUSR,
- edac_pci_list_string_show,
- edac_pci_list_string_store);
-
-EDAC_PCI_STRING_ATTR(pci_parity_blacklist,
- &pci_blacklist_control,
- S_IRUGO|S_IWUSR,
- edac_pci_list_string_show,
- edac_pci_list_string_store);
-#endif
-
/* PCI Parity control files */
EDAC_PCI_ATTR(check_pci_parity, S_IRUGO|S_IWUSR, edac_pci_int_show,
edac_pci_int_store);
.default_attrs = (struct attribute **) edac_pci_attr,
};
-#endif /* DISABLE_EDAC_SYSFS */
-
/**
* edac_sysfs_pci_setup()
*
*/
static int edac_sysfs_pci_setup(void)
-#ifdef DISABLE_EDAC_SYSFS
-{
- return 0;
-}
-#else
{
int err;
return err;
}
-#endif /* DISABLE_EDAC_SYSFS */
static void edac_sysfs_pci_teardown(void)
{
-#ifndef DISABLE_EDAC_SYSFS
debugf0("%s()\n", __func__);
init_completion(&edac_pci_kobj_complete);
kobject_unregister(&edac_pci_kobj);
wait_for_completion(&edac_pci_kobj_complete);
-#endif
}
}
}
-/*
- * check_dev_on_list: Scan for a PCI device on a white/black list
- * @list: an EDAC &edac_pci_device_list white/black list pointer
- * @free_index: index of next free entry on the list
- * @pci_dev: PCI Device pointer
- *
- * see if list contains the device.
- *
- * Returns: 0 not found
- * 1 found on list
- */
-static int check_dev_on_list(struct edac_pci_device_list *list,
- int free_index, struct pci_dev *dev)
-{
- int i;
- int rc = 0; /* Assume not found */
- unsigned short vendor=dev->vendor;
- unsigned short device=dev->device;
-
- /* Scan the list, looking for a vendor/device match */
- for (i = 0; i < free_index; i++, list++ ) {
- if ((list->vendor == vendor ) && (list->device == device )) {
- rc = 1;
- break;
- }
- }
-
- return rc;
-}
-
/*
* pci_dev parity list iterator
* Scan the PCI device list for one iteration, looking for SERRORs
* bumped until we are done with it
*/
while((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
- /* if whitelist exists then it has priority, so only scan
- * those devices on the whitelist
- */
- if (pci_whitelist_count > 0 ) {
- if (check_dev_on_list(pci_whitelist,
- pci_whitelist_count, dev))
- fn(dev);
- } else {
- /*
- * if no whitelist, then check if this devices is
- * blacklisted
- */
- if (!check_dev_on_list(pci_blacklist,
- pci_blacklist_count, dev))
- fn(dev);
- }
+ fn(dev);
}
}
#else /* CONFIG_PCI */
-static inline void do_pci_parity_check(void)
-{
- /* no-op */
-}
-
-static inline void clear_pci_parity_errors(void)
-{
- /* no-op */
-}
-
-static void edac_sysfs_pci_teardown(void)
-{
-}
+/* pre-process these away */
+#define do_pci_parity_check()
+#define clear_pci_parity_errors()
+#define edac_sysfs_pci_teardown()
+#define edac_sysfs_pci_setup() (0)
-static int edac_sysfs_pci_setup(void)
-{
- return 0;
-}
#endif /* CONFIG_PCI */
-#ifndef DISABLE_EDAC_SYSFS
-
-/* EDAC sysfs CSROW data structures and methods */
-
-/* Set of more detailed csrow<id> attribute show/store functions */
-static ssize_t csrow_ch0_dimm_label_show(struct csrow_info *csrow, char *data)
-{
- ssize_t size = 0;
-
- if (csrow->nr_channels > 0) {
- size = snprintf(data, EDAC_MC_LABEL_LEN,"%s\n",
- csrow->channels[0].label);
- }
-
- return size;
-}
+/* EDAC sysfs CSROW data structures and methods
+ */
-static ssize_t csrow_ch1_dimm_label_show(struct csrow_info *csrow, char *data)
+/* Set of more default csrow<id> attribute show/store functions */
+static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data, int private)
{
- ssize_t size = 0;
-
- if (csrow->nr_channels > 0) {
- size = snprintf(data, EDAC_MC_LABEL_LEN, "%s\n",
- csrow->channels[1].label);
- }
-
- return size;
+ return sprintf(data,"%u\n", csrow->ue_count);
}
-static ssize_t csrow_ch0_dimm_label_store(struct csrow_info *csrow,
- const char *data, size_t size)
+static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data, int private)
{
- ssize_t max_size = 0;
-
- if (csrow->nr_channels > 0) {
- max_size = min((ssize_t)size,(ssize_t)EDAC_MC_LABEL_LEN-1);
- strncpy(csrow->channels[0].label, data, max_size);
- csrow->channels[0].label[max_size] = '\0';
- }
-
- return size;
+ return sprintf(data,"%u\n", csrow->ce_count);
}
-static ssize_t csrow_ch1_dimm_label_store(struct csrow_info *csrow,
- const char *data, size_t size)
+static ssize_t csrow_size_show(struct csrow_info *csrow, char *data, int private)
{
- ssize_t max_size = 0;
-
- if (csrow->nr_channels > 1) {
- max_size = min((ssize_t)size,(ssize_t)EDAC_MC_LABEL_LEN-1);
- strncpy(csrow->channels[1].label, data, max_size);
- csrow->channels[1].label[max_size] = '\0';
- }
-
- return max_size;
+ return sprintf(data,"%u\n", PAGES_TO_MiB(csrow->nr_pages));
}
-static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data)
+static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data, int private)
{
- return sprintf(data,"%u\n", csrow->ue_count);
+ return sprintf(data,"%s\n", mem_types[csrow->mtype]);
}
-static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data)
+static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data, int private)
{
- return sprintf(data,"%u\n", csrow->ce_count);
+ return sprintf(data,"%s\n", dev_types[csrow->dtype]);
}
-static ssize_t csrow_ch0_ce_count_show(struct csrow_info *csrow, char *data)
+static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data, int private)
{
- ssize_t size = 0;
-
- if (csrow->nr_channels > 0) {
- size = sprintf(data,"%u\n", csrow->channels[0].ce_count);
- }
-
- return size;
+ return sprintf(data,"%s\n", edac_caps[csrow->edac_mode]);
}
-static ssize_t csrow_ch1_ce_count_show(struct csrow_info *csrow, char *data)
+/* show/store functions for DIMM Label attributes */
+static ssize_t channel_dimm_label_show(struct csrow_info *csrow,
+ char *data, int channel)
{
- ssize_t size = 0;
-
- if (csrow->nr_channels > 1) {
- size = sprintf(data,"%u\n", csrow->channels[1].ce_count);
- }
-
- return size;
+ return snprintf(data, EDAC_MC_LABEL_LEN,"%s",
+ csrow->channels[channel].label);
}
-static ssize_t csrow_size_show(struct csrow_info *csrow, char *data)
+static ssize_t channel_dimm_label_store(struct csrow_info *csrow,
+ const char *data,
+ size_t count,
+ int channel)
{
- return sprintf(data,"%u\n", PAGES_TO_MiB(csrow->nr_pages));
-}
+ ssize_t max_size = 0;
-static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data)
-{
- return sprintf(data,"%s\n", mem_types[csrow->mtype]);
-}
+ max_size = min((ssize_t)count,(ssize_t)EDAC_MC_LABEL_LEN-1);
+ strncpy(csrow->channels[channel].label, data, max_size);
+ csrow->channels[channel].label[max_size] = '\0';
-static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data)
-{
- return sprintf(data,"%s\n", dev_types[csrow->dtype]);
+ return max_size;
}
-static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data)
+/* show function for dynamic chX_ce_count attribute */
+static ssize_t channel_ce_count_show(struct csrow_info *csrow,
+ char *data,
+ int channel)
{
- return sprintf(data,"%s\n", edac_caps[csrow->edac_mode]);
+ return sprintf(data, "%u\n", csrow->channels[channel].ce_count);
}
+/* csrow specific attribute structure */
struct csrowdev_attribute {
struct attribute attr;
- ssize_t (*show)(struct csrow_info *,char *);
- ssize_t (*store)(struct csrow_info *, const char *,size_t);
+ ssize_t (*show)(struct csrow_info *,char *,int);
+ ssize_t (*store)(struct csrow_info *, const char *,size_t,int);
+ int private;
};
#define to_csrow(k) container_of(k, struct csrow_info, kobj)
#define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr)
-/* Set of show/store higher level functions for csrow objects */
-static ssize_t csrowdev_show(struct kobject *kobj, struct attribute *attr,
- char *buffer)
+/* Set of show/store higher level functions for default csrow attributes */
+static ssize_t csrowdev_show(struct kobject *kobj,
+ struct attribute *attr,
+ char *buffer)
{
struct csrow_info *csrow = to_csrow(kobj);
struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
if (csrowdev_attr->show)
- return csrowdev_attr->show(csrow, buffer);
-
+ return csrowdev_attr->show(csrow,
+ buffer,
+ csrowdev_attr->private);
return -EIO;
}
struct csrowdev_attribute * csrowdev_attr = to_csrowdev_attr(attr);
if (csrowdev_attr->store)
- return csrowdev_attr->store(csrow, buffer, count);
-
+ return csrowdev_attr->store(csrow,
+ buffer,
+ count,
+ csrowdev_attr->private);
return -EIO;
}
.store = csrowdev_store
};
-#define CSROWDEV_ATTR(_name,_mode,_show,_store) \
+#define CSROWDEV_ATTR(_name,_mode,_show,_store,_private) \
struct csrowdev_attribute attr_##_name = { \
.attr = {.name = __stringify(_name), .mode = _mode }, \
.show = _show, \
.store = _store, \
+ .private = _private, \
};
-/* cwrow<id>/attribute files */
-CSROWDEV_ATTR(size_mb,S_IRUGO,csrow_size_show,NULL);
-CSROWDEV_ATTR(dev_type,S_IRUGO,csrow_dev_type_show,NULL);
-CSROWDEV_ATTR(mem_type,S_IRUGO,csrow_mem_type_show,NULL);
-CSROWDEV_ATTR(edac_mode,S_IRUGO,csrow_edac_mode_show,NULL);
-CSROWDEV_ATTR(ue_count,S_IRUGO,csrow_ue_count_show,NULL);
-CSROWDEV_ATTR(ce_count,S_IRUGO,csrow_ce_count_show,NULL);
-CSROWDEV_ATTR(ch0_ce_count,S_IRUGO,csrow_ch0_ce_count_show,NULL);
-CSROWDEV_ATTR(ch1_ce_count,S_IRUGO,csrow_ch1_ce_count_show,NULL);
-
-/* control/attribute files */
-CSROWDEV_ATTR(ch0_dimm_label,S_IRUGO|S_IWUSR,
- csrow_ch0_dimm_label_show,
- csrow_ch0_dimm_label_store);
-CSROWDEV_ATTR(ch1_dimm_label,S_IRUGO|S_IWUSR,
- csrow_ch1_dimm_label_show,
- csrow_ch1_dimm_label_store);
+/* default cwrow<id>/attribute files */
+CSROWDEV_ATTR(size_mb,S_IRUGO,csrow_size_show,NULL,0);
+CSROWDEV_ATTR(dev_type,S_IRUGO,csrow_dev_type_show,NULL,0);
+CSROWDEV_ATTR(mem_type,S_IRUGO,csrow_mem_type_show,NULL,0);
+CSROWDEV_ATTR(edac_mode,S_IRUGO,csrow_edac_mode_show,NULL,0);
+CSROWDEV_ATTR(ue_count,S_IRUGO,csrow_ue_count_show,NULL,0);
+CSROWDEV_ATTR(ce_count,S_IRUGO,csrow_ce_count_show,NULL,0);
-/* Attributes of the CSROW<id> object */
-static struct csrowdev_attribute *csrow_attr[] = {
+/* default attributes of the CSROW<id> object */
+static struct csrowdev_attribute *default_csrow_attr[] = {
&attr_dev_type,
&attr_mem_type,
&attr_edac_mode,
&attr_size_mb,
&attr_ue_count,
&attr_ce_count,
- &attr_ch0_ce_count,
- &attr_ch1_ce_count,
- &attr_ch0_dimm_label,
- &attr_ch1_dimm_label,
NULL,
};
-/* No memory to release */
+
+/* possible dynamic channel DIMM Label attribute files */
+CSROWDEV_ATTR(ch0_dimm_label,S_IRUGO|S_IWUSR,
+ channel_dimm_label_show,
+ channel_dimm_label_store,
+ 0 );
+CSROWDEV_ATTR(ch1_dimm_label,S_IRUGO|S_IWUSR,
+ channel_dimm_label_show,
+ channel_dimm_label_store,
+ 1 );
+CSROWDEV_ATTR(ch2_dimm_label,S_IRUGO|S_IWUSR,
+ channel_dimm_label_show,
+ channel_dimm_label_store,
+ 2 );
+CSROWDEV_ATTR(ch3_dimm_label,S_IRUGO|S_IWUSR,
+ channel_dimm_label_show,
+ channel_dimm_label_store,
+ 3 );
+CSROWDEV_ATTR(ch4_dimm_label,S_IRUGO|S_IWUSR,
+ channel_dimm_label_show,
+ channel_dimm_label_store,
+ 4 );
+CSROWDEV_ATTR(ch5_dimm_label,S_IRUGO|S_IWUSR,
+ channel_dimm_label_show,
+ channel_dimm_label_store,
+ 5 );
+
+/* Total possible dynamic DIMM Label attribute file table */
+static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = {
+ &attr_ch0_dimm_label,
+ &attr_ch1_dimm_label,
+ &attr_ch2_dimm_label,
+ &attr_ch3_dimm_label,
+ &attr_ch4_dimm_label,
+ &attr_ch5_dimm_label
+};
+
+/* possible dynamic channel ce_count attribute files */
+CSROWDEV_ATTR(ch0_ce_count,S_IRUGO|S_IWUSR,
+ channel_ce_count_show,
+ NULL,
+ 0 );
+CSROWDEV_ATTR(ch1_ce_count,S_IRUGO|S_IWUSR,
+ channel_ce_count_show,
+ NULL,
+ 1 );
+CSROWDEV_ATTR(ch2_ce_count,S_IRUGO|S_IWUSR,
+ channel_ce_count_show,
+ NULL,
+ 2 );
+CSROWDEV_ATTR(ch3_ce_count,S_IRUGO|S_IWUSR,
+ channel_ce_count_show,
+ NULL,
+ 3 );
+CSROWDEV_ATTR(ch4_ce_count,S_IRUGO|S_IWUSR,
+ channel_ce_count_show,
+ NULL,
+ 4 );
+CSROWDEV_ATTR(ch5_ce_count,S_IRUGO|S_IWUSR,
+ channel_ce_count_show,
+ NULL,
+ 5 );
+
+/* Total possible dynamic ce_count attribute file table */
+static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = {
+ &attr_ch0_ce_count,
+ &attr_ch1_ce_count,
+ &attr_ch2_ce_count,
+ &attr_ch3_ce_count,
+ &attr_ch4_ce_count,
+ &attr_ch5_ce_count
+};
+
+
+#define EDAC_NR_CHANNELS 6
+
+/* Create dynamic CHANNEL files, indexed by 'chan', under specifed CSROW */
+static int edac_create_channel_files(struct kobject *kobj, int chan)
+{
+ int err=-ENODEV;
+
+ if (chan >= EDAC_NR_CHANNELS)
+ return err;
+
+ /* create the DIMM label attribute file */
+ err = sysfs_create_file(kobj,
+ (struct attribute *) dynamic_csrow_dimm_attr[chan]);
+
+ if (!err) {
+ /* create the CE Count attribute file */
+ err = sysfs_create_file(kobj,
+ (struct attribute *) dynamic_csrow_ce_count_attr[chan]);
+ } else {
+ debugf1("%s() dimm labels and ce_count files created", __func__);
+ }
+
+ return err;
+}
+
+/* No memory to release for this kobj */
static void edac_csrow_instance_release(struct kobject *kobj)
{
struct csrow_info *cs;
- debugf1("%s()\n", __func__);
cs = container_of(kobj, struct csrow_info, kobj);
complete(&cs->kobj_complete);
}
+/* the kobj_type instance for a CSROW */
static struct kobj_type ktype_csrow = {
.release = edac_csrow_instance_release,
.sysfs_ops = &csrowfs_ops,
- .default_attrs = (struct attribute **) csrow_attr,
+ .default_attrs = (struct attribute **) default_csrow_attr,
};
/* Create a CSROW object under specifed edac_mc_device */
-static int edac_create_csrow_object(struct kobject *edac_mci_kobj,
- struct csrow_info *csrow, int index)
+static int edac_create_csrow_object(
+ struct kobject *edac_mci_kobj,
+ struct csrow_info *csrow,
+ int index)
{
int err = 0;
+ int chan;
- debugf0("%s()\n", __func__);
memset(&csrow->kobj, 0, sizeof(csrow->kobj));
/* generate ..../edac/mc/mc<id>/csrow<index> */
/* name this instance of csrow<id> */
err = kobject_set_name(&csrow->kobj,"csrow%d",index);
+ if (err)
+ goto error_exit;
+ /* Instanstiate the csrow object */
+ err = kobject_register(&csrow->kobj);
if (!err) {
- /* Instanstiate the csrow object */
- err = kobject_register(&csrow->kobj);
-
- if (err)
- debugf0("Failed to register CSROW%d\n",index);
- else
- debugf0("Registered CSROW%d\n",index);
+ /* Create the dyanmic attribute files on this csrow,
+ * namely, the DIMM labels and the channel ce_count
+ */
+ for (chan = 0; chan < csrow->nr_channels; chan++) {
+ err = edac_create_channel_files(&csrow->kobj,chan);
+ if (err)
+ break;
+ }
}
+error_exit:
return err;
}
-/* sysfs data structures and methods for the MCI kobjects */
+/* default sysfs methods and data structures for the main MCI kobject */
static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci,
const char *data, size_t count)
return count;
}
+/* default attribute files for the MCI object */
static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data)
{
return sprintf(data,"%d\n", mci->ue_count);
return sprintf(data,"%ld\n", (jiffies - mci->start_time) / HZ);
}
-static ssize_t mci_mod_name_show(struct mem_ctl_info *mci, char *data)
-{
- return sprintf(data,"%s %s\n", mci->mod_name, mci->mod_ver);
-}
-
static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data)
{
return sprintf(data,"%s\n", mci->ctl_name);
}
-static int mci_output_edac_cap(char *buf, unsigned long edac_cap)
-{
- char *p = buf;
- int bit_idx;
-
- for (bit_idx = 0; bit_idx < 8 * sizeof(edac_cap); bit_idx++) {
- if ((edac_cap >> bit_idx) & 0x1)
- p += sprintf(p, "%s ", edac_caps[bit_idx]);
- }
-
- return p - buf;
-}
-
-static ssize_t mci_edac_capability_show(struct mem_ctl_info *mci, char *data)
-{
- char *p = data;
-
- p += mci_output_edac_cap(p,mci->edac_ctl_cap);
- p += sprintf(p, "\n");
- return p - data;
-}
-
-static ssize_t mci_edac_current_capability_show(struct mem_ctl_info *mci,
- char *data)
-{
- char *p = data;
-
- p += mci_output_edac_cap(p,mci->edac_cap);
- p += sprintf(p, "\n");
- return p - data;
-}
-
-static int mci_output_mtype_cap(char *buf, unsigned long mtype_cap)
-{
- char *p = buf;
- int bit_idx;
-
- for (bit_idx = 0; bit_idx < 8 * sizeof(mtype_cap); bit_idx++) {
- if ((mtype_cap >> bit_idx) & 0x1)
- p += sprintf(p, "%s ", mem_types[bit_idx]);
- }
-
- return p - buf;
-}
-
-static ssize_t mci_supported_mem_type_show(struct mem_ctl_info *mci,
- char *data)
-{
- char *p = data;
-
- p += mci_output_mtype_cap(p,mci->mtype_cap);
- p += sprintf(p, "\n");
- return p - data;
-}
-
static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data)
{
int total_pages, csrow_idx;
#define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj)
#define to_mcidev_attr(a) container_of(a, struct mcidev_attribute, attr)
+/* MCI show/store functions for top most object */
static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr,
char *buffer)
{
.store = _store, \
};
-/* Control file */
+/* default Control file */
MCIDEV_ATTR(reset_counters,S_IWUSR,NULL,mci_reset_counters_store);
-/* Attribute files */
+/* default Attribute files */
MCIDEV_ATTR(mc_name,S_IRUGO,mci_ctl_name_show,NULL);
-MCIDEV_ATTR(module_name,S_IRUGO,mci_mod_name_show,NULL);
-MCIDEV_ATTR(edac_capability,S_IRUGO,mci_edac_capability_show,NULL);
MCIDEV_ATTR(size_mb,S_IRUGO,mci_size_mb_show,NULL);
MCIDEV_ATTR(seconds_since_reset,S_IRUGO,mci_seconds_show,NULL);
MCIDEV_ATTR(ue_noinfo_count,S_IRUGO,mci_ue_noinfo_show,NULL);
MCIDEV_ATTR(ce_noinfo_count,S_IRUGO,mci_ce_noinfo_show,NULL);
MCIDEV_ATTR(ue_count,S_IRUGO,mci_ue_count_show,NULL);
MCIDEV_ATTR(ce_count,S_IRUGO,mci_ce_count_show,NULL);
-MCIDEV_ATTR(edac_current_capability,S_IRUGO,
- mci_edac_current_capability_show,NULL);
-MCIDEV_ATTR(supported_mem_type,S_IRUGO,
- mci_supported_mem_type_show,NULL);
static struct mcidev_attribute *mci_attr[] = {
&mci_attr_reset_counters,
- &mci_attr_module_name,
&mci_attr_mc_name,
- &mci_attr_edac_capability,
- &mci_attr_edac_current_capability,
- &mci_attr_supported_mem_type,
&mci_attr_size_mb,
&mci_attr_seconds_since_reset,
&mci_attr_ue_noinfo_count,
.default_attrs = (struct attribute **) mci_attr,
};
-#endif /* DISABLE_EDAC_SYSFS */
#define EDAC_DEVICE_SYMLINK "device"
* !0 Failure
*/
static int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
-#ifdef DISABLE_EDAC_SYSFS
-{
- return 0;
-}
-#else
{
int i;
int err;
/* set the name of the mc<id> object */
err = kobject_set_name(edac_mci_kobj,"mc%d",mci->mc_idx);
-
if (err)
return err;
/* register the mc<id> kobject */
err = kobject_register(edac_mci_kobj);
-
if (err)
return err;
/* create a symlink for the device */
err = sysfs_create_link(edac_mci_kobj, &mci->dev->kobj,
EDAC_DEVICE_SYMLINK);
-
if (err)
goto fail0;
/* Only expose populated CSROWs */
if (csrow->nr_pages > 0) {
err = edac_create_csrow_object(edac_mci_kobj,csrow,i);
-
if (err)
goto fail1;
}
wait_for_completion(&mci->kobj_complete);
return err;
}
-#endif /* DISABLE_EDAC_SYSFS */
/*
* remove a Memory Controller instance
*/
static void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
{
-#ifndef DISABLE_EDAC_SYSFS
int i;
debugf0("%s()\n", __func__);
init_completion(&mci->kobj_complete);
kobject_unregister(&mci->edac_mci_kobj);
wait_for_completion(&mci->kobj_complete);
-#endif /* DISABLE_EDAC_SYSFS */
}
/* END OF sysfs data and methods */
projects / GitHub / LineageOS / android_kernel_samsung_universal7580.git / commitdiff