diff options
Diffstat (limited to 'drivers/edac/edac_mc.c')
| -rw-r--r-- | drivers/edac/edac_mc.c | 854 |
1 files changed, 376 insertions, 478 deletions
diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c index 262e44544dc8..ea06e3a4dc35 100644 --- a/drivers/edac/edac_mc.c +++ b/drivers/edac/edac_mc.c @@ -12,7 +12,6 @@ * */ - #include <linux/config.h> #include <linux/module.h> #include <linux/proc_fs.h> @@ -29,25 +28,30 @@ #include <linux/list.h> #include <linux/sysdev.h> #include <linux/ctype.h> - +#include <linux/kthread.h> #include <asm/uaccess.h> #include <asm/page.h> #include <asm/edac.h> - #include "edac_mc.h" -#define EDAC_MC_VERSION "edac_mc Ver: 2.0.0 " __DATE__ +#define EDAC_MC_VERSION "Ver: 2.0.0 " __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 */ int edac_debug_level = 1; -EXPORT_SYMBOL(edac_debug_level); +EXPORT_SYMBOL_GPL(edac_debug_level); #endif /* EDAC Controls, setable by module parameter, and sysfs */ static int log_ue = 1; static int log_ce = 1; -static int panic_on_ue = 1; +static int panic_on_ue; static int poll_msec = 1000; static int check_pci_parity = 0; /* default YES check PCI parity */ @@ -58,13 +62,14 @@ static atomic_t pci_parity_count = ATOMIC_INIT(0); static DECLARE_MUTEX(mem_ctls_mutex); static struct list_head mc_devices = LIST_HEAD_INIT(mc_devices); +static struct task_struct *edac_thread; + /* 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 */ @@ -77,6 +82,8 @@ static int pci_whitelist_count ; /* START sysfs data and methods */ +#ifndef DISABLE_EDAC_SYSFS + static const char *mem_types[] = { [MEM_EMPTY] = "Empty", [MEM_RESERVED] = "Reserved", @@ -115,7 +122,6 @@ static const char *edac_caps[] = { [EDAC_S16ECD16ED] = "S16ECD16ED" }; - /* sysfs object: /sys/devices/system/edac */ static struct sysdev_class edac_class = { set_kset_name("edac"), @@ -128,9 +134,15 @@ static struct sysdev_class edac_class = { static struct kobject edac_memctrl_kobj; static struct kobject edac_pci_kobj; +/* We use these to wait for the reference counts on edac_memctrl_kobj and + * edac_pci_kobj to reach 0. + */ +static struct completion edac_memctrl_kobj_complete; +static struct completion edac_pci_kobj_complete; + /* * /sys/devices/system/edac/mc; - * data structures and methods + * data structures and methods */ #if 0 static ssize_t memctrl_string_show(void *ptr, char *buffer) @@ -157,33 +169,34 @@ static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count) } struct memctrl_dev_attribute { - struct attribute attr; - void *value; + struct attribute attr; + void *value; ssize_t (*show)(void *,char *); ssize_t (*store)(void *, const char *, size_t); }; /* Set of show/store abstract level functions for memory control object */ -static ssize_t -memctrl_dev_show(struct kobject *kobj, struct attribute *attr, char *buffer) +static ssize_t memctrl_dev_show(struct kobject *kobj, + struct attribute *attr, char *buffer) { struct memctrl_dev_attribute *memctrl_dev; memctrl_dev = (struct memctrl_dev_attribute*)attr; if (memctrl_dev->show) return memctrl_dev->show(memctrl_dev->value, buffer); + return -EIO; } -static ssize_t -memctrl_dev_store(struct kobject *kobj, struct attribute *attr, - const char *buffer, size_t count) +static ssize_t memctrl_dev_store(struct kobject *kobj, struct attribute *attr, + const char *buffer, size_t count) { struct memctrl_dev_attribute *memctrl_dev; memctrl_dev = (struct memctrl_dev_attribute*)attr; if (memctrl_dev->store) return memctrl_dev->store(memctrl_dev->value, buffer, count); + return -EIO; } @@ -219,7 +232,6 @@ MEMCTRL_ATTR(log_ue,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store); MEMCTRL_ATTR(log_ce,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store); MEMCTRL_ATTR(poll_msec,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store); - /* Base Attributes of the memory ECC object */ static struct memctrl_dev_attribute *memctrl_attr[] = { &attr_panic_on_ue, @@ -232,15 +244,17 @@ static struct memctrl_dev_attribute *memctrl_attr[] = { /* Main MC kobject release() function */ static void edac_memctrl_master_release(struct kobject *kobj) { - debugf1("EDAC MC: " __FILE__ ": %s()\n", __func__); + debugf1("%s()\n", __func__); + complete(&edac_memctrl_kobj_complete); } static struct kobj_type ktype_memctrl = { - .release = edac_memctrl_master_release, - .sysfs_ops = &memctrlfs_ops, - .default_attrs = (struct attribute **) memctrl_attr, + .release = edac_memctrl_master_release, + .sysfs_ops = &memctrlfs_ops, + .default_attrs = (struct attribute **) memctrl_attr, }; +#endif /* DISABLE_EDAC_SYSFS */ /* Initialize the main sysfs entries for edac: * /sys/devices/system/edac @@ -251,38 +265,43 @@ static struct kobj_type ktype_memctrl = { * !0 FAILURE */ static int edac_sysfs_memctrl_setup(void) +#ifdef DISABLE_EDAC_SYSFS +{ + return 0; +} +#else { int err=0; - debugf1("MC: " __FILE__ ": %s()\n", __func__); + debugf1("%s()\n", __func__); /* create the /sys/devices/system/edac directory */ err = sysdev_class_register(&edac_class); + if (!err) { /* Init the MC's kobject */ memset(&edac_memctrl_kobj, 0, sizeof (edac_memctrl_kobj)); - kobject_init(&edac_memctrl_kobj); - edac_memctrl_kobj.parent = &edac_class.kset.kobj; edac_memctrl_kobj.ktype = &ktype_memctrl; /* generate sysfs "..../edac/mc" */ err = kobject_set_name(&edac_memctrl_kobj,"mc"); + if (!err) { /* FIXME: maybe new sysdev_create_subdir() */ err = kobject_register(&edac_memctrl_kobj); - if (err) { + + if (err) debugf1("Failed to register '.../edac/mc'\n"); - } else { + else debugf1("Registered '.../edac/mc' kobject\n"); - } } - } else { - debugf1(KERN_WARNING "__FILE__ %s() error=%d\n", __func__,err); - } + } else + debugf1("%s() error=%d\n", __func__, err); return err; } +#endif /* DISABLE_EDAC_SYSFS */ /* * MC teardown: @@ -290,18 +309,23 @@ static int edac_sysfs_memctrl_setup(void) */ static void edac_sysfs_memctrl_teardown(void) { +#ifndef DISABLE_EDAC_SYSFS debugf0("MC: " __FILE__ ": %s()\n", __func__); - /* Unregister the MC's kobject */ + /* Unregister the MC's kobject and wait for reference count to reach + * 0. + */ + init_completion(&edac_memctrl_kobj_complete); kobject_unregister(&edac_memctrl_kobj); - - /* release the master edac mc kobject */ - kobject_put(&edac_memctrl_kobj); + wait_for_completion(&edac_memctrl_kobj_complete); /* Unregister the 'edac' object */ sysdev_class_unregister(&edac_class); +#endif /* DISABLE_EDAC_SYSFS */ } +#ifndef DISABLE_EDAC_SYSFS + /* * /sys/devices/system/edac/pci; * data structures and methods @@ -312,7 +336,6 @@ struct list_control { 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) @@ -337,7 +360,6 @@ static ssize_t edac_pci_list_string_show(void *ptr, char *buffer) } len += snprintf(p + len,(PAGE_SIZE-len), "\n"); - return (ssize_t) len; } @@ -359,7 +381,7 @@ static int parse_one_device(const char **s,const char **e, /* if null byte, we are done */ if (!**s) { - (*s)++; /* keep *s moving */ + (*s)++; /* keep *s moving */ return 0; } @@ -376,6 +398,7 @@ static int parse_one_device(const char **s,const char **e, /* parse vendor_id */ runner = *s; + while (runner < *e) { /* scan for vendor:device delimiter */ if (*runner == ':') { @@ -383,6 +406,7 @@ static int parse_one_device(const char **s,const char **e, runner = p + 1; break; } + runner++; } @@ -398,12 +422,11 @@ static int parse_one_device(const char **s,const char **e, } *s = runner; - return 1; } static ssize_t edac_pci_list_string_store(void *ptr, const char *buffer, - size_t count) + size_t count) { struct list_control *listctl; struct edac_pci_device_list *list; @@ -413,14 +436,12 @@ static ssize_t edac_pci_list_string_store(void *ptr, const char *buffer, s = (char*)buffer; e = s + count; - listctl = ptr; list = listctl->list; index = listctl->count; - *index = 0; - while (*index < MAX_LISTED_PCI_DEVICES) { + 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; @@ -453,15 +474,15 @@ static ssize_t edac_pci_int_store(void *ptr, const char *buffer, size_t count) } struct edac_pci_dev_attribute { - struct attribute attr; - void *value; + struct attribute attr; + void *value; ssize_t (*show)(void *,char *); ssize_t (*store)(void *, const char *,size_t); }; /* Set of show/store abstract level functions for PCI Parity object */ static ssize_t edac_pci_dev_show(struct kobject *kobj, struct attribute *attr, - char *buffer) + char *buffer) { struct edac_pci_dev_attribute *edac_pci_dev; edac_pci_dev= (struct edac_pci_dev_attribute*)attr; @@ -471,8 +492,8 @@ static ssize_t edac_pci_dev_show(struct kobject *kobj, struct attribute *attr, return -EIO; } -static ssize_t edac_pci_dev_store(struct kobject *kobj, struct attribute *attr, - const char *buffer, size_t count) +static ssize_t edac_pci_dev_store(struct kobject *kobj, + struct attribute *attr, const char *buffer, size_t count) { struct edac_pci_dev_attribute *edac_pci_dev; edac_pci_dev= (struct edac_pci_dev_attribute*)attr; @@ -487,7 +508,6 @@ static struct sysfs_ops edac_pci_sysfs_ops = { .store = edac_pci_dev_store }; - #define EDAC_PCI_ATTR(_name,_mode,_show,_store) \ struct edac_pci_dev_attribute edac_pci_attr_##_name = { \ .attr = {.name = __stringify(_name), .mode = _mode }, \ @@ -530,9 +550,11 @@ EDAC_PCI_STRING_ATTR(pci_parity_blacklist, #endif /* PCI Parity control files */ -EDAC_PCI_ATTR(check_pci_parity,S_IRUGO|S_IWUSR,edac_pci_int_show,edac_pci_int_store); -EDAC_PCI_ATTR(panic_on_pci_parity,S_IRUGO|S_IWUSR,edac_pci_int_show,edac_pci_int_store); -EDAC_PCI_ATTR(pci_parity_count,S_IRUGO,edac_pci_int_show,NULL); +EDAC_PCI_ATTR(check_pci_parity, S_IRUGO|S_IWUSR, edac_pci_int_show, + edac_pci_int_store); +EDAC_PCI_ATTR(panic_on_pci_parity, S_IRUGO|S_IWUSR, edac_pci_int_show, + edac_pci_int_store); +EDAC_PCI_ATTR(pci_parity_count, S_IRUGO, edac_pci_int_show, NULL); /* Base Attributes of the memory ECC object */ static struct edac_pci_dev_attribute *edac_pci_attr[] = { @@ -545,53 +567,65 @@ static struct edac_pci_dev_attribute *edac_pci_attr[] = { /* No memory to release */ static void edac_pci_release(struct kobject *kobj) { - debugf1("EDAC PCI: " __FILE__ ": %s()\n", __func__); + debugf1("%s()\n", __func__); + complete(&edac_pci_kobj_complete); } static struct kobj_type ktype_edac_pci = { - .release = edac_pci_release, - .sysfs_ops = &edac_pci_sysfs_ops, - .default_attrs = (struct attribute **) edac_pci_attr, + .release = edac_pci_release, + .sysfs_ops = &edac_pci_sysfs_ops, + .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; - debugf1("MC: " __FILE__ ": %s()\n", __func__); + debugf1("%s()\n", __func__); memset(&edac_pci_kobj, 0, sizeof(edac_pci_kobj)); - - kobject_init(&edac_pci_kobj); edac_pci_kobj.parent = &edac_class.kset.kobj; edac_pci_kobj.ktype = &ktype_edac_pci; - err = kobject_set_name(&edac_pci_kobj, "pci"); + if (!err) { /* Instanstiate the csrow object */ /* FIXME: maybe new sysdev_create_subdir() */ err = kobject_register(&edac_pci_kobj); + if (err) debugf1("Failed to register '.../edac/pci'\n"); else debugf1("Registered '.../edac/pci' kobject\n"); } + return err; } - +#endif /* DISABLE_EDAC_SYSFS */ static void edac_sysfs_pci_teardown(void) { - debugf0("MC: " __FILE__ ": %s()\n", __func__); - +#ifndef DISABLE_EDAC_SYSFS + debugf0("%s()\n", __func__); + init_completion(&edac_pci_kobj_complete); kobject_unregister(&edac_pci_kobj); - kobject_put(&edac_pci_kobj); + wait_for_completion(&edac_pci_kobj_complete); +#endif } +#ifndef DISABLE_EDAC_SYSFS + /* EDAC sysfs CSROW data structures and methods */ /* Set of more detailed csrow<id> attribute show/store functions */ @@ -603,6 +637,7 @@ static ssize_t csrow_ch0_dimm_label_show(struct csrow_info *csrow, char *data) size = snprintf(data, EDAC_MC_LABEL_LEN,"%s\n", csrow->channels[0].label); } + return size; } @@ -614,11 +649,12 @@ static ssize_t csrow_ch1_dimm_label_show(struct csrow_info *csrow, char *data) size = snprintf(data, EDAC_MC_LABEL_LEN, "%s\n", csrow->channels[1].label); } + return size; } static ssize_t csrow_ch0_dimm_label_store(struct csrow_info *csrow, - const char *data, size_t size) + const char *data, size_t size) { ssize_t max_size = 0; @@ -627,11 +663,12 @@ static ssize_t csrow_ch0_dimm_label_store(struct csrow_info *csrow, strncpy(csrow->channels[0].label, data, max_size); csrow->channels[0].label[max_size] = '\0'; } + return size; } static ssize_t csrow_ch1_dimm_label_store(struct csrow_info *csrow, - const char *data, size_t size) + const char *data, size_t size) { ssize_t max_size = 0; @@ -640,6 +677,7 @@ static ssize_t csrow_ch1_dimm_label_store(struct csrow_info *csrow, strncpy(csrow->channels[1].label, data, max_size); csrow->channels[1].label[max_size] = '\0'; } + return max_size; } @@ -660,6 +698,7 @@ static ssize_t csrow_ch0_ce_count_show(struct csrow_info *csrow, char *data) if (csrow->nr_channels > 0) { size = sprintf(data,"%u\n", csrow->channels[0].ce_count); } + return size; } @@ -670,6 +709,7 @@ static ssize_t csrow_ch1_ce_count_show(struct csrow_info *csrow, char *data) if (csrow->nr_channels > 1) { size = sprintf(data,"%u\n", csrow->channels[1].ce_count); } + return size; } @@ -694,7 +734,7 @@ static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data) } struct csrowdev_attribute { - struct attribute attr; + struct attribute attr; ssize_t (*show)(struct csrow_info *,char *); ssize_t (*store)(struct csrow_info *, const char *,size_t); }; @@ -704,24 +744,26 @@ struct csrowdev_attribute { /* Set of show/store higher level functions for csrow objects */ static ssize_t csrowdev_show(struct kobject *kobj, struct attribute *attr, - char *buffer) + 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 -EIO; } static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr, - const char *buffer, size_t count) + const char *buffer, size_t count) { struct csrow_info *csrow = to_csrow(kobj); struct csrowdev_attribute * csrowdev_attr = to_csrowdev_attr(attr); if (csrowdev_attr->store) return csrowdev_attr->store(csrow, buffer, count); + return -EIO; } @@ -755,7 +797,6 @@ CSROWDEV_ATTR(ch1_dimm_label,S_IRUGO|S_IWUSR, csrow_ch1_dimm_label_show, csrow_ch1_dimm_label_store); - /* Attributes of the CSROW<id> object */ static struct csrowdev_attribute *csrow_attr[] = { &attr_dev_type, @@ -771,40 +812,43 @@ static struct csrowdev_attribute *csrow_attr[] = { NULL, }; - /* No memory to release */ static void edac_csrow_instance_release(struct kobject *kobj) { - debugf1("EDAC MC: " __FILE__ ": %s()\n", __func__); + struct csrow_info *cs; + + debugf1("%s()\n", __func__); + cs = container_of(kobj, struct csrow_info, kobj); + complete(&cs->kobj_complete); } static struct kobj_type ktype_csrow = { - .release = edac_csrow_instance_release, - .sysfs_ops = &csrowfs_ops, - .default_attrs = (struct attribute **) csrow_attr, + .release = edac_csrow_instance_release, + .sysfs_ops = &csrowfs_ops, + .default_attrs = (struct attribute **) 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 ) + struct csrow_info *csrow, int index) { int err = 0; - debugf0("MC: " __FILE__ ": %s()\n", __func__); - + debugf0("%s()\n", __func__); memset(&csrow->kobj, 0, sizeof(csrow->kobj)); /* generate ..../edac/mc/mc<id>/csrow<index> */ - kobject_init(&csrow->kobj); csrow->kobj.parent = edac_mci_kobj; csrow->kobj.ktype = &ktype_csrow; /* name this instance of csrow<id> */ err = kobject_set_name(&csrow->kobj,"csrow%d",index); + if (!err) { /* Instanstiate the csrow object */ err = kobject_register(&csrow->kobj); + if (err) debugf0("Failed to register CSROW%d\n",index); else @@ -816,8 +860,8 @@ static int edac_create_csrow_object(struct kobject *edac_mci_kobj, /* sysfs data structures and methods for the MCI kobjects */ -static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci, - const char *data, size_t count ) +static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci, + const char *data, size_t count) { int row, chan; @@ -825,16 +869,18 @@ static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci, mci->ce_noinfo_count = 0; mci->ue_count = 0; mci->ce_count = 0; + for (row = 0; row < mci->nr_csrows; row++) { struct csrow_info *ri = &mci->csrows[row]; ri->ue_count = 0; ri->ce_count = 0; + for (chan = 0; chan < ri->nr_channels; chan++) ri->channels[chan].ce_count = 0; } - mci->start_time = jiffies; + mci->start_time = jiffies; return count; } @@ -892,18 +938,16 @@ static ssize_t mci_edac_capability_show(struct mem_ctl_info *mci, char *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 *data) { char *p = data; p += mci_output_edac_cap(p,mci->edac_cap); p += sprintf(p, "\n"); - return p - data; } @@ -920,13 +964,13 @@ static int mci_output_mtype_cap(char *buf, unsigned long mtype_cap) return p - buf; } -static ssize_t mci_supported_mem_type_show(struct mem_ctl_info *mci, char *data) +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; } @@ -940,6 +984,7 @@ static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data) if (!csrow->nr_pages) continue; + total_pages += csrow->nr_pages; } @@ -947,7 +992,7 @@ static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data) } struct mcidev_attribute { - struct attribute attr; + struct attribute attr; ssize_t (*show)(struct mem_ctl_info *,char *); ssize_t (*store)(struct mem_ctl_info *, const char *,size_t); }; @@ -956,30 +1001,32 @@ struct mcidev_attribute { #define to_mcidev_attr(a) container_of(a, struct mcidev_attribute, attr) static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr, - char *buffer) + char *buffer) { struct mem_ctl_info *mem_ctl_info = to_mci(kobj); struct mcidev_attribute * mcidev_attr = to_mcidev_attr(attr); if (mcidev_attr->show) return mcidev_attr->show(mem_ctl_info, buffer); + return -EIO; } static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr, - const char *buffer, size_t count) + const char *buffer, size_t count) { struct mem_ctl_info *mem_ctl_info = to_mci(kobj); struct mcidev_attribute * mcidev_attr = to_mcidev_attr(attr); if (mcidev_attr->store) return mcidev_attr->store(mem_ctl_info, buffer, count); + return -EIO; } static struct sysfs_ops mci_ops = { - .show = mcidev_show, - .store = mcidev_store + .show = mcidev_show, + .store = mcidev_store }; #define MCIDEV_ATTR(_name,_mode,_show,_store) \ @@ -1007,7 +1054,6 @@ MCIDEV_ATTR(edac_current_capability,S_IRUGO, 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, @@ -1024,27 +1070,26 @@ static struct mcidev_attribute *mci_attr[] = { NULL }; - /* * Release of a MC controlling instance */ static void edac_mci_instance_release(struct kobject *kobj) { struct mem_ctl_info *mci; - mci = container_of(kobj,struct mem_ctl_info,edac_mci_kobj); - - debugf0("MC: " __FILE__ ": %s() idx=%d calling kfree\n", - __func__, mci->mc_idx); - kfree(mci); + mci = to_mci(kobj); + debugf0("%s() idx=%d\n", __func__, mci->mc_idx); + complete(&mci->kobj_complete); } static struct kobj_type ktype_mci = { - .release = edac_mci_instance_release, - .sysfs_ops = &mci_ops, - .default_attrs = (struct attribute **) mci_attr, + .release = edac_mci_instance_release, + .sysfs_ops = &mci_ops, + .default_attrs = (struct attribute **) mci_attr, }; +#endif /* DISABLE_EDAC_SYSFS */ + #define EDAC_DEVICE_SYMLINK "device" /* @@ -1056,19 +1101,23 @@ static struct kobj_type ktype_mci = { * !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; struct csrow_info *csrow; struct kobject *edac_mci_kobj=&mci->edac_mci_kobj; - debugf0("MC: " __FILE__ ": %s() idx=%d\n", __func__, mci->mc_idx); - + debugf0("%s() idx=%d\n", __func__, mci->mc_idx); memset(edac_mci_kobj, 0, sizeof(*edac_mci_kobj)); - kobject_init(edac_mci_kobj); /* set the name of the mc<id> object */ err = kobject_set_name(edac_mci_kobj,"mc%d",mci->mc_idx); + if (err) return err; @@ -1078,82 +1127,82 @@ static int edac_create_sysfs_mci_device(struct mem_ctl_info *mci) /* 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->pdev->dev.kobj, EDAC_DEVICE_SYMLINK); - if (err) { - kobject_unregister(edac_mci_kobj); - return err; - } + + if (err) + goto fail0; /* Make directories for each CSROW object * under the mc<id> kobject */ for (i = 0; i < mci->nr_csrows; i++) { - csrow = &mci->csrows[i]; /* Only expose populated CSROWs */ if (csrow->nr_pages > 0) { err = edac_create_csrow_object(edac_mci_kobj,csrow,i); + if (err) - goto fail; + goto fail1; } } - /* Mark this MCI instance as having sysfs entries */ - mci->sysfs_active = MCI_SYSFS_ACTIVE; - return 0; - /* CSROW error: backout what has already been registered, */ -fail: +fail1: for ( i--; i >= 0; i--) { if (csrow->nr_pages > 0) { + init_completion(&csrow->kobj_complete); kobject_unregister(&mci->csrows[i].kobj); - kobject_put(&mci->csrows[i].kobj); + wait_for_completion(&csrow->kobj_complete); } } +fail0: + init_completion(&mci->kobj_complete); kobject_unregister(edac_mci_kobj); - kobject_put(edac_mci_kobj); - + 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("MC: " __FILE__ ": %s()\n", __func__); + debugf0("%s()\n", __func__); /* remove all csrow kobjects */ for (i = 0; i < mci->nr_csrows; i++) { - if (mci->csrows[i].nr_pages > 0) { + if (mci->csrows[i].nr_pages > 0) { + init_completion(&mci->csrows[i].kobj_complete); kobject_unregister(&mci->csrows[i].kobj); - kobject_put(&mci->csrows[i].kobj); + wait_for_completion(&mci->csrows[i].kobj_complete); } } sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK); - + init_completion(&mci->kobj_complete); kobject_unregister(&mci->edac_mci_kobj); - kobject_put(&mci->edac_mci_kobj); + wait_for_completion(&mci->kobj_complete); +#endif /* DISABLE_EDAC_SYSFS */ } /* END OF sysfs data and methods */ #ifdef CONFIG_EDAC_DEBUG -EXPORT_SYMBOL(edac_mc_dump_channel); - void edac_mc_dump_channel(struct channel_info *chan) { debugf4("\tchannel = %p\n", chan); @@ -1162,9 +1211,7 @@ void edac_mc_dump_channel(struct channel_info *chan) debugf4("\tchannel->label = '%s'\n", chan->label); debugf4("\tchannel->csrow = %p\n\n", chan->csrow); } - - -EXPORT_SYMBOL(edac_mc_dump_csrow); +EXPORT_SYMBOL_GPL(edac_mc_dump_channel); void edac_mc_dump_csrow(struct csrow_info *csrow) { @@ -1180,9 +1227,7 @@ void edac_mc_dump_csrow(struct csrow_info *csrow) debugf4("\tcsrow->channels = %p\n", csrow->channels); debugf4("\tcsrow->mci = %p\n\n", csrow->mci); } - - -EXPORT_SYMBOL(edac_mc_dump_mci); +EXPORT_SYMBOL_GPL(edac_mc_dump_csrow); void edac_mc_dump_mci(struct mem_ctl_info *mci) { @@ -1198,9 +1243,9 @@ void edac_mc_dump_mci(struct mem_ctl_info *mci) mci->mod_name, mci->ctl_name); debugf3("\tpvt_info = %p\n\n", mci->pvt_info); } +EXPORT_SYMBOL_GPL(edac_mc_dump_mci); - -#endif /* CONFIG_EDAC_DEBUG */ +#endif /* CONFIG_EDAC_DEBUG */ /* 'ptr' points to a possibly unaligned item X such that sizeof(X) is 'size'. * Adjust 'ptr' so that its alignment is at least as stringent as what the @@ -1209,7 +1254,7 @@ void edac_mc_dump_mci(struct mem_ctl_info *mci) * If 'size' is a constant, the compiler will optimize this whole function * down to either a no-op or the addition of a constant to the value of 'ptr'. */ -static inline char * align_ptr (void *ptr, unsigned size) +static inline char * align_ptr(void *ptr, unsigned size) { unsigned align, r; @@ -1236,9 +1281,6 @@ static inline char * align_ptr (void *ptr, unsigned size) return (char *) (((unsigned long) ptr) + align - r); } - -EXPORT_SYMBOL(edac_mc_alloc); - /** * edac_mc_alloc: Allocate a struct mem_ctl_info structure * @size_pvt: size of private storage needed @@ -1256,7 +1298,7 @@ EXPORT_SYMBOL(edac_mc_alloc); * struct mem_ctl_info pointer */ struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows, - unsigned nr_chans) + unsigned nr_chans) { struct mem_ctl_info *mci; struct csrow_info *csi, *csrow; @@ -1287,8 +1329,7 @@ struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows, chi = (struct channel_info *) (((char *) mci) + ((unsigned long) chi)); pvt = sz_pvt ? (((char *) mci) + ((unsigned long) pvt)) : NULL; - memset(mci, 0, size); /* clear all fields */ - + memset(mci, 0, size); /* clear all fields */ mci->csrows = csi; mci->pvt_info = pvt; mci->nr_csrows = nr_csrows; @@ -1310,50 +1351,24 @@ struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows, return mci; } - - -EXPORT_SYMBOL(edac_mc_free); +EXPORT_SYMBOL_GPL(edac_mc_alloc); /** * edac_mc_free: Free a previously allocated 'mci' structure * @mci: pointer to a struct mem_ctl_info structure - * - * Free up a previously allocated mci structure - * A MCI structure can be in 2 states after being allocated - * by edac_mc_alloc(). - * 1) Allocated in a MC driver's probe, but not yet committed - * 2) Allocated and committed, by a call to edac_mc_add_mc() - * edac_mc_add_mc() is the function that adds the sysfs entries - * thus, this free function must determine which state the 'mci' - * structure is in, then either free it directly or - * perform kobject cleanup by calling edac_remove_sysfs_mci_device(). - * - * VOID Return */ void edac_mc_free(struct mem_ctl_info *mci) { - /* only if sysfs entries for this mci instance exist - * do we remove them and defer the actual kfree via - * the kobject 'release()' callback. - * - * Otherwise, do a straight kfree now. - */ - if (mci->sysfs_active == MCI_SYSFS_ACTIVE) - edac_remove_sysfs_mci_device(mci); - else - kfree(mci); + kfree(mci); } +EXPORT_SYMBOL_GPL(edac_mc_free); - - -EXPORT_SYMBOL(edac_mc_find_mci_by_pdev); - -struct mem_ctl_info *edac_mc_find_mci_by_pdev(struct pci_dev *pdev) +static struct mem_ctl_info *find_mci_by_pdev(struct pci_dev *pdev) { struct mem_ctl_info *mci; struct list_head *item; - debugf3("MC: " __FILE__ ": %s()\n", __func__); + debugf3("%s()\n", __func__); list_for_each(item, &mc_devices) { mci = list_entry(item, struct mem_ctl_info, link); @@ -1365,7 +1380,7 @@ struct mem_ctl_info *edac_mc_find_mci_by_pdev(struct pci_dev *pdev) return NULL; } -static int add_mc_to_global_list (struct mem_ctl_info *mci) +static int add_mc_to_global_list(struct mem_ctl_info *mci) { struct list_head *item, *insert_before; struct mem_ctl_info *p; @@ -1375,11 +1390,12 @@ static int add_mc_to_global_list (struct mem_ctl_info *mci) mci->mc_idx = 0; insert_before = &mc_devices; } else { - if (edac_mc_find_mci_by_pdev(mci->pdev)) { - printk(KERN_WARNING - "EDAC MC: %s (%s) %s %s already assigned %d\n", - mci->pdev->dev.bus_id, pci_name(mci->pdev), - mci->mod_name, mci->ctl_name, mci->mc_idx); + if (find_mci_by_pdev(mci->pdev)) { + edac_printk(KERN_WARNING, EDAC_MC, + "%s (%s) %s %s already assigned %d\n", + mci->pdev->dev.bus_id, + pci_name(mci->pdev), mci->mod_name, + mci->ctl_name, mci->mc_idx); return 1; } @@ -1407,12 +1423,26 @@ static int add_mc_to_global_list (struct mem_ctl_info *mci) return 0; } +static void complete_mc_list_del(struct rcu_head *head) +{ + struct mem_ctl_info *mci; + mci = container_of(head, struct mem_ctl_info, rcu); + INIT_LIST_HEAD(&mci->link); + complete(&mci->complete); +} -EXPORT_SYMBOL(edac_mc_add_mc); +static void del_mc_from_global_list(struct mem_ctl_info *mci) +{ + list_del_rcu(&mci->link); + init_completion(&mci->complete); + call_rcu(&mci->rcu, complete_mc_list_del); + wait_for_completion(&mci->complete); +} /** - * edac_mc_add_mc: Insert the 'mci' structure into the mci global list + * edac_mc_add_mc: Insert the 'mci' structure into the mci global list and + * create sysfs entries associated with mci structure * @mci: pointer to the mci structure to be added to the list * * Return: @@ -1423,111 +1453,90 @@ EXPORT_SYMBOL(edac_mc_add_mc); /* FIXME - should a warning be printed if no error detection? correction? */ int edac_mc_add_mc(struct mem_ctl_info *mci) { - int rc = 1; - - debugf0("MC: " __FILE__ ": %s()\n", __func__); + debugf0("%s()\n", __func__); #ifdef CONFIG_EDAC_DEBUG if (edac_debug_level >= 3) edac_mc_dump_mci(mci); + if (edac_debug_level >= 4) { int i; for (i = 0; i < mci->nr_csrows; i++) { int j; + edac_mc_dump_csrow(&mci->csrows[i]); for (j = 0; j < mci->csrows[i].nr_channels; j++) - edac_mc_dump_channel(&mci->csrows[i]. - channels[j]); + edac_mc_dump_channel( + &mci->csrows[i].channels[j]); } } #endif down(&mem_ctls_mutex); if (add_mc_to_global_list(mci)) - goto finish; + goto fail0; /* set load time so that error rate can be tracked */ mci->start_time = jiffies; if (edac_create_sysfs_mci_device(mci)) { - printk(KERN_WARNING - "EDAC MC%d: failed to create sysfs device\n", - mci->mc_idx); - /* FIXME - should there be an error code and unwind? */ - goto finish; + edac_mc_printk(mci, KERN_WARNING, + "failed to create sysfs device\n"); + goto fail1; } /* Report action taken */ - printk(KERN_INFO - "EDAC MC%d: Giving out device to %s %s: PCI %s\n", - mci->mc_idx, mci->mod_name, mci->ctl_name, - pci_name(mci->pdev)); - + edac_mc_printk(mci, KERN_INFO, "Giving out device to %s %s: PCI %s\n", + mci->mod_name, mci->ctl_name, pci_name(mci->pdev)); - rc = 0; - -finish: up(&mem_ctls_mutex); - return rc; -} - - - -static void complete_mc_list_del (struct rcu_head *head) -{ - struct mem_ctl_info *mci; + return 0; - mci = container_of(head, struct mem_ctl_info, rcu); - INIT_LIST_HEAD(&mci->link); - complete(&mci->complete); -} +fail1: + del_mc_from_global_list(mci); -static void del_mc_from_global_list (struct mem_ctl_info *mci) -{ - list_del_rcu(&mci->link); - init_completion(&mci->complete); - call_rcu(&mci->rcu, complete_mc_list_del); - wait_for_completion(&mci->complete); +fail0: + up(&mem_ctls_mutex); + return 1; } - -EXPORT_SYMBOL(edac_mc_del_mc); +EXPORT_SYMBOL_GPL(edac_mc_add_mc); /** - * edac_mc_del_mc: Remove the specified mci structure from global list - * @mci: Pointer to struct mem_ctl_info structure + * edac_mc_del_mc: Remove sysfs entries for specified mci structure and + * remove mci structure from global list + * @pdev: Pointer to 'struct pci_dev' representing mci structure to remove. * - * Returns: - * 0 Success - * 1 Failure + * Return pointer to removed mci structure, or NULL if device not found. */ -int edac_mc_del_mc(struct mem_ctl_info *mci) +struct mem_ctl_info * edac_mc_del_mc(struct pci_dev *pdev) { - int rc = 1; + struct mem_ctl_info *mci; - debugf0("MC%d: " __FILE__ ": %s()\n", mci->mc_idx, __func__); + debugf0("MC: %s()\n", __func__); down(&mem_ctls_mutex); + + if ((mci = find_mci_by_pdev(pdev)) == NULL) { + up(&mem_ctls_mutex); + return NULL; + } + + edac_remove_sysfs_mci_device(mci); del_mc_from_global_list(mci); - printk(KERN_INFO - "EDAC MC%d: Removed device %d for %s %s: PCI %s\n", - mci->mc_idx, mci->mc_idx, mci->mod_name, mci->ctl_name, - pci_name(mci->pdev)); - rc = 0; up(&mem_ctls_mutex); - - return rc; + edac_printk(KERN_INFO, EDAC_MC, + "Removed device %d for %s %s: PCI %s\n", mci->mc_idx, + mci->mod_name, mci->ctl_name, pci_name(mci->pdev)); + return mci; } +EXPORT_SYMBOL_GPL(edac_mc_del_mc); - -EXPORT_SYMBOL(edac_mc_scrub_block); - -void edac_mc_scrub_block(unsigned long page, unsigned long offset, - u32 size) +void edac_mc_scrub_block(unsigned long page, unsigned long offset, u32 size) { struct page *pg; void *virt_addr; unsigned long flags = 0; - debugf3("MC: " __FILE__ ": %s()\n", __func__); + debugf3("%s()\n", __func__); /* ECC error page was not in our memory. Ignore it. */ if(!pfn_valid(page)) @@ -1550,19 +1559,15 @@ void edac_mc_scrub_block(unsigned long page, unsigned long offset, if (PageHighMem(pg)) local_irq_restore(flags); } - +EXPORT_SYMBOL_GPL(edac_mc_scrub_block); /* FIXME - should return -1 */ -EXPORT_SYMBOL(edac_mc_find_csrow_by_page); - -int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci, - unsigned long page) +int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci, unsigned long page) { struct csrow_info *csrows = mci->csrows; int row, i; - debugf1("MC%d: " __FILE__ ": %s(): 0x%lx\n", mci->mc_idx, __func__, - page); + debugf1("MC%d: %s(): 0x%lx\n", mci->mc_idx, __func__, page); row = -1; for (i = 0; i < mci->nr_csrows; i++) { @@ -1571,11 +1576,10 @@ int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci, if (csrow->nr_pages == 0) continue; - debugf3("MC%d: " __FILE__ - ": %s(): first(0x%lx) page(0x%lx)" - " last(0x%lx) mask(0x%lx)\n", mci->mc_idx, - __func__, csrow->first_page, page, - csrow->last_page, csrow->page_mask); + debugf3("MC%d: %s(): first(0x%lx) page(0x%lx) last(0x%lx) " + "mask(0x%lx)\n", mci->mc_idx, __func__, + csrow->first_page, page, csrow->last_page, + csrow->page_mask); if ((page >= csrow->first_page) && (page <= csrow->last_page) && @@ -1587,56 +1591,52 @@ int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci, } if (row == -1) - printk(KERN_ERR - "EDAC MC%d: could not look up page error address %lx\n", - mci->mc_idx, (unsigned long) page); + edac_mc_printk(mci, KERN_ERR, + "could not look up page error address %lx\n", + (unsigned long) page); return row; } - - -EXPORT_SYMBOL(edac_mc_handle_ce); +EXPORT_SYMBOL_GPL(edac_mc_find_csrow_by_page); /* FIXME - setable log (warning/emerg) levels */ /* FIXME - integrate with evlog: http://evlog.sourceforge.net/ */ void edac_mc_handle_ce(struct mem_ctl_info *mci, - unsigned long page_frame_number, - unsigned long offset_in_page, - unsigned long syndrome, int row, int channel, - const char *msg) + unsigned long page_frame_number, unsigned long offset_in_page, + unsigned long syndrome, int row, int channel, const char *msg) { unsigned long remapped_page; - debugf3("MC%d: " __FILE__ ": %s()\n", mci->mc_idx, __func__); + debugf3("MC%d: %s()\n", mci->mc_idx, __func__); /* FIXME - maybe make panic on INTERNAL ERROR an option */ if (row >= mci->nr_csrows || row < 0) { /* something is wrong */ - printk(KERN_ERR - "EDAC MC%d: INTERNAL ERROR: row out of range (%d >= %d)\n", - mci->mc_idx, row, mci->nr_csrows); + edac_mc_printk(mci, KERN_ERR, + "INTERNAL ERROR: row out of range " + "(%d >= %d)\n", row, mci->nr_csrows); edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); return; } + if (channel >= mci->csrows[row].nr_channels || channel < 0) { /* something is wrong */ - printk(KERN_ERR - "EDAC MC%d: INTERNAL ERROR: channel out of range " - "(%d >= %d)\n", - mci->mc_idx, channel, mci->csrows[row].nr_channels); + edac_mc_printk(mci, KERN_ERR, + "INTERNAL ERROR: channel out of range " + "(%d >= %d)\n", channel, + mci->csrows[row].nr_channels); edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); return; } if (log_ce) /* FIXME - put in DIMM location */ - printk(KERN_WARNING - "EDAC MC%d: CE page 0x%lx, offset 0x%lx," - " grain %d, syndrome 0x%lx, row %d, channel %d," - " label \"%s\": %s\n", mci->mc_idx, - page_frame_number, offset_in_page, - mci->csrows[row].grain, syndrome, row, channel, - mci->csrows[row].channels[channel].label, msg); + edac_mc_printk(mci, KERN_WARNING, + "CE page 0x%lx, offset 0x%lx, grain %d, syndrome " + "0x%lx, row %d, channel %d, label \"%s\": %s\n", + page_frame_number, offset_in_page, + mci->csrows[row].grain, syndrome, row, channel, + mci->csrows[row].channels[channel].label, msg); mci->ce_count++; mci->csrows[row].ce_count++; @@ -1657,31 +1657,25 @@ void edac_mc_handle_ce(struct mem_ctl_info *mci, page_frame_number; edac_mc_scrub_block(remapped_page, offset_in_page, - mci->csrows[row].grain); + mci->csrows[row].grain); } } +EXPORT_SYMBOL_GPL(edac_mc_handle_ce); - -EXPORT_SYMBOL(edac_mc_handle_ce_no_info); - -void edac_mc_handle_ce_no_info(struct mem_ctl_info *mci, - const char *msg) +void edac_mc_handle_ce_no_info(struct mem_ctl_info *mci, const char *msg) { if (log_ce) - printk(KERN_WARNING - "EDAC MC%d: CE - no information available: %s\n", - mci->mc_idx, msg); + edac_mc_printk(mci, KERN_WARNING, + "CE - no information available: %s\n", msg); + mci->ce_noinfo_count++; mci->ce_count++; } - - -EXPORT_SYMBOL(edac_mc_handle_ue); +EXPORT_SYMBOL_GPL(edac_mc_handle_ce_no_info); void edac_mc_handle_ue(struct mem_ctl_info *mci, - unsigned long page_frame_number, - unsigned long offset_in_page, int row, - const char *msg) + unsigned long page_frame_number, unsigned long offset_in_page, + int row, const char *msg) { int len = EDAC_MC_LABEL_LEN * 4; char labels[len + 1]; @@ -1689,65 +1683,61 @@ void edac_mc_handle_ue(struct mem_ctl_info *mci, int chan; int chars; - debugf3("MC%d: " __FILE__ ": %s()\n", mci->mc_idx, __func__); + debugf3("MC%d: %s()\n", mci->mc_idx, __func__); /* FIXME - maybe make panic on INTERNAL ERROR an option */ if (row >= mci->nr_csrows || row < 0) { /* something is wrong */ - printk(KERN_ERR - "EDAC MC%d: INTERNAL ERROR: row out of range (%d >= %d)\n", - mci->mc_idx, row, mci->nr_csrows); + edac_mc_printk(mci, KERN_ERR, + "INTERNAL ERROR: row out of range " + "(%d >= %d)\n", row, mci->nr_csrows); edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR"); return; } chars = snprintf(pos, len + 1, "%s", - mci->csrows[row].channels[0].label); + mci->csrows[row].channels[0].label); len -= chars; pos += chars; + for (chan = 1; (chan < mci->csrows[row].nr_channels) && (len > 0); chan++) { chars = snprintf(pos, len + 1, ":%s", - mci->csrows[row].channels[chan].label); + mci->csrows[row].channels[chan].label); len -= chars; pos += chars; } if (log_ue) - printk(KERN_EMERG - "EDAC MC%d: UE page 0x%lx, offset 0x%lx, grain %d, row %d," - " labels \"%s\": %s\n", mci->mc_idx, - page_frame_number, offset_in_page, - mci->csrows[row].grain, row, labels, msg); + edac_mc_printk(mci, KERN_EMERG, + "UE page 0x%lx, offset 0x%lx, grain %d, row %d, " + "labels \"%s\": %s\n", page_frame_number, + offset_in_page, mci->csrows[row].grain, row, labels, + msg); if (panic_on_ue) - panic - ("EDAC MC%d: UE page 0x%lx, offset 0x%lx, grain %d, row %d," - " labels \"%s\": %s\n", mci->mc_idx, - page_frame_number, offset_in_page, - mci->csrows[row].grain, row, labels, msg); + panic("EDAC MC%d: UE page 0x%lx, offset 0x%lx, grain %d, " + "row %d, labels \"%s\": %s\n", mci->mc_idx, + page_frame_number, offset_in_page, + mci->csrows[row].grain, row, labels, msg); mci->ue_count++; mci->csrows[row].ue_count++; } +EXPORT_SYMBOL_GPL(edac_mc_handle_ue); - -EXPORT_SYMBOL(edac_mc_handle_ue_no_info); - -void edac_mc_handle_ue_no_info(struct mem_ctl_info *mci, - const char *msg) +void edac_mc_handle_ue_no_info(struct mem_ctl_info *mci, const char *msg) { if (panic_on_ue) panic("EDAC MC%d: Uncorrected Error", mci->mc_idx); if (log_ue) - printk(KERN_WARNING - "EDAC MC%d: UE - no information available: %s\n", - mci->mc_idx, msg); + edac_mc_printk(mci, KERN_WARNING, + "UE - no information available: %s\n", msg); mci->ue_noinfo_count++; mci->ue_count++; } - +EXPORT_SYMBOL_GPL(edac_mc_handle_ue_no_info); #ifdef CONFIG_PCI @@ -1759,18 +1749,22 @@ static u16 get_pci_parity_status(struct pci_dev *dev, int secondary) where = secondary ? PCI_SEC_STATUS : PCI_STATUS; pci_read_config_word(dev, where, &status); - /* If we get back 0xFFFF then we must suspect that the card has been pulled but - the Linux PCI layer has not yet finished cleaning up. We don't want to report - on such devices */ + /* If we get back 0xFFFF then we must suspect that the card has been + * pulled but the Linux PCI layer has not yet finished cleaning up. + * We don't want to report on such devices + */ if (status == 0xFFFF) { u32 sanity; + pci_read_config_dword(dev, 0, &sanity); + if (sanity == 0xFFFFFFFF) return 0; } + status &= PCI_STATUS_DETECTED_PARITY | PCI_STATUS_SIG_SYSTEM_ERROR | - PCI_STATUS_PARITY; + PCI_STATUS_PARITY; if (status) /* reset only the bits we are interested in */ @@ -1782,7 +1776,7 @@ static u16 get_pci_parity_status(struct pci_dev *dev, int secondary) typedef void (*pci_parity_check_fn_t) (struct pci_dev *dev); /* Clear any PCI parity errors logged by this device. */ -static void edac_pci_dev_parity_clear( struct pci_dev *dev ) +static void edac_pci_dev_parity_clear(struct pci_dev *dev) { u8 header_type; @@ -1813,25 +1807,22 @@ static void edac_pci_dev_parity_test(struct pci_dev *dev) /* check the status reg for errors */ if (status) { if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) - printk(KERN_CRIT - "EDAC PCI- " + edac_printk(KERN_CRIT, EDAC_PCI, "Signaled System Error on %s\n", - pci_name (dev)); + pci_name(dev)); if (status & (PCI_STATUS_PARITY)) { - printk(KERN_CRIT - "EDAC PCI- " + edac_printk(KERN_CRIT, EDAC_PCI, "Master Data Parity Error on %s\n", - pci_name (dev)); + pci_name(dev)); atomic_inc(&pci_parity_count); } if (status & (PCI_STATUS_DETECTED_PARITY)) { - printk(KERN_CRIT - "EDAC PCI- " + edac_printk(KERN_CRIT, EDAC_PCI, "Detected Parity Error on %s\n", - pci_name (dev)); + pci_name(dev)); atomic_inc(&pci_parity_count); } @@ -1852,25 +1843,22 @@ static void edac_pci_dev_parity_test(struct pci_dev *dev) /* check the secondary status reg for errors */ if (status) { if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) - printk(KERN_CRIT - "EDAC PCI-Bridge- " + edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " "Signaled System Error on %s\n", - pci_name (dev)); + pci_name(dev)); if (status & (PCI_STATUS_PARITY)) { - printk(KERN_CRIT - "EDAC PCI-Bridge- " - "Master Data Parity Error on %s\n", - pci_name (dev)); + edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " + "Master Data Parity Error on " + "%s\n", pci_name(dev)); atomic_inc(&pci_parity_count); } if (status & (PCI_STATUS_DETECTED_PARITY)) { - printk(KERN_CRIT - "EDAC PCI-Bridge- " + edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " "Detected Parity Error on %s\n", - pci_name (dev)); + pci_name(dev)); atomic_inc(&pci_parity_count); } @@ -1889,58 +1877,55 @@ static void edac_pci_dev_parity_test(struct pci_dev *dev) * 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; - } - } +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; + return rc; } /* * pci_dev parity list iterator - * Scan the PCI device list for one iteration, looking for SERRORs + * Scan the PCI device list for one iteration, looking for SERRORs * Master Parity ERRORS or Parity ERRORs on primary or secondary devices */ static inline void edac_pci_dev_parity_iterator(pci_parity_check_fn_t fn) { - struct pci_dev *dev=NULL; + struct pci_dev *dev = NULL; /* request for kernel access to the next PCI device, if any, * and while we are looking at it have its reference count * 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, + /* 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 { + } else { /* * if no whitelist, then check if this devices is * blacklisted */ - if (!check_dev_on_list(pci_blacklist, + if (!check_dev_on_list(pci_blacklist, pci_blacklist_count, dev)) fn(dev); - } + } } } @@ -1949,7 +1934,7 @@ static void do_pci_parity_check(void) unsigned long flags; int before_count; - debugf3("MC: " __FILE__ ": %s()\n", __func__); + debugf3("%s()\n", __func__); if (!check_pci_parity) return; @@ -1971,7 +1956,6 @@ static void do_pci_parity_check(void) } } - static inline void clear_pci_parity_errors(void) { /* Clear any PCI bus parity errors that devices initially have logged @@ -1980,37 +1964,30 @@ static inline void clear_pci_parity_errors(void) edac_pci_dev_parity_iterator(edac_pci_dev_parity_clear); } - #else /* CONFIG_PCI */ - static inline void do_pci_parity_check(void) { /* no-op */ } - static inline void clear_pci_parity_errors(void) { /* no-op */ } - #endif /* CONFIG_PCI */ /* * Iterate over all MC instances and check for ECC, et al, errors */ -static inline void check_mc_devices (void) +static inline void check_mc_devices(void) { - unsigned long flags; struct list_head *item; struct mem_ctl_info *mci; - debugf3("MC: " __FILE__ ": %s()\n", __func__); - - /* during poll, have interrupts off */ - local_irq_save(flags); + debugf3("%s()\n", __func__); + down(&mem_ctls_mutex); list_for_each(item, &mc_devices) { mci = list_entry(item, struct mem_ctl_info, link); @@ -2019,10 +1996,9 @@ static inline void check_mc_devices (void) mci->edac_check(mci); } - local_irq_restore(flags); + up(&mem_ctls_mutex); } - /* * Check MC status every poll_msec. * Check PCI status every poll_msec as well. @@ -2033,70 +2009,21 @@ static inline void check_mc_devices (void) */ static void do_edac_check(void) { - - debugf3("MC: " __FILE__ ": %s()\n", __func__); - + debugf3("%s()\n", __func__); check_mc_devices(); - do_pci_parity_check(); } - -/* - * EDAC thread state information - */ -struct bs_thread_info -{ - struct task_struct *task; - struct completion *event; - char *name; - void (*run)(void); -}; - -static struct bs_thread_info bs_thread; - -/* - * edac_kernel_thread - * This the kernel thread that processes edac operations - * in a normal thread environment - */ static int edac_kernel_thread(void *arg) { - struct bs_thread_info *thread = (struct bs_thread_info *) arg; - - /* detach thread */ - daemonize(thread->name); - - current->exit_signal = SIGCHLD; - allow_signal(SIGKILL); - thread->task = current; - - /* indicate to starting task we have started */ - complete(thread->event); - - /* loop forever, until we are told to stop */ - while(thread->run != NULL) { - void (*run)(void); - - /* call the function to check the memory controllers */ - run = thread->run; - if (run) - run(); - - if (signal_pending(current)) - flush_signals(current); - - /* ensure we are interruptable */ - set_current_state(TASK_INTERRUPTIBLE); + while (!kthread_should_stop()) { + do_edac_check(); /* goto sleep for the interval */ - schedule_timeout((HZ * poll_msec) / 1000); + schedule_timeout_interruptible((HZ * poll_msec) / 1000); try_to_freeze(); } - /* notify waiter that we are exiting */ - complete(thread->event); - return 0; } @@ -2106,10 +2033,7 @@ static int edac_kernel_thread(void *arg) */ static int __init edac_mc_init(void) { - int ret; - struct completion event; - - printk(KERN_INFO "MC: " __FILE__ " version " EDAC_MC_VERSION "\n"); + edac_printk(KERN_INFO, EDAC_MC, EDAC_MC_VERSION "\n"); /* * Harvest and clear any boot/initialization PCI parity errors @@ -2120,80 +2044,54 @@ static int __init edac_mc_init(void) */ clear_pci_parity_errors(); - /* perform check for first time to harvest boot leftovers */ - do_edac_check(); - - /* Create the MC sysfs entires */ + /* Create the MC sysfs entries */ if (edac_sysfs_memctrl_setup()) { - printk(KERN_ERR "EDAC MC: Error initializing sysfs code\n"); + edac_printk(KERN_ERR, EDAC_MC, + "Error initializing sysfs code\n"); return -ENODEV; } /* Create the PCI parity sysfs entries */ if (edac_sysfs_pci_setup()) { edac_sysfs_memctrl_teardown(); - printk(KERN_ERR "EDAC PCI: Error initializing sysfs code\n"); + edac_printk(KERN_ERR, EDAC_MC, + "EDAC PCI: Error initializing sysfs code\n"); return -ENODEV; } - /* Create our kernel thread */ - init_completion(&event); - bs_thread.event = &event; - bs_thread.name = "kedac"; - bs_thread.run = do_edac_check; - /* create our kernel thread */ - ret = kernel_thread(edac_kernel_thread, &bs_thread, CLONE_KERNEL); - if (ret < 0) { + edac_thread = kthread_run(edac_kernel_thread, NULL, "kedac"); + + if (IS_ERR(edac_thread)) { /* remove the sysfs entries */ edac_sysfs_memctrl_teardown(); edac_sysfs_pci_teardown(); - return -ENOMEM; + return PTR_ERR(edac_thread); } - /* wait for our kernel theard ack that it is up and running */ - wait_for_completion(&event); - return 0; } - /* * edac_mc_exit() * module exit/termination functioni */ static void __exit edac_mc_exit(void) { - struct completion event; - - debugf0("MC: " __FILE__ ": %s()\n", __func__); - - init_completion(&event); - bs_thread.event = &event; - - /* As soon as ->run is set to NULL, the task could disappear, - * so we need to hold tasklist_lock until we have sent the signal - */ - read_lock(&tasklist_lock); - bs_thread.run = NULL; - send_sig(SIGKILL, bs_thread.task, 1); - read_unlock(&tasklist_lock); - wait_for_completion(&event); + debugf0("%s()\n", __func__); + kthread_stop(edac_thread); /* tear down the sysfs device */ edac_sysfs_memctrl_teardown(); edac_sysfs_pci_teardown(); } - - - module_init(edac_mc_init); module_exit(edac_mc_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Linux Networx (http://lnxi.com) Thayne Harbaugh et al\n" - "Based on.work by Dan Hollis et al"); + "Based on work by Dan Hollis et al"); MODULE_DESCRIPTION("Core library routines for MC reporting"); module_param(panic_on_ue, int, 0644); |