| /* |
| * edac_mc kernel module |
| * (C) 2005, 2006 Linux Networx (http://lnxi.com) |
| * This file may be distributed under the terms of the |
| * GNU General Public License. |
| * |
| * Written Doug Thompson <norsk5@xmission.com> |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/sysdev.h> |
| #include <linux/ctype.h> |
| |
| #include "edac_core.h" |
| #include "edac_module.h" |
| |
| /* MC EDAC Controls, setable by module parameter, and sysfs */ |
| static int edac_mc_log_ue = 1; |
| static int edac_mc_log_ce = 1; |
| static int edac_mc_panic_on_ue = 0; |
| static int edac_mc_poll_msec = 1000; |
| |
| /* Getter functions for above */ |
| int edac_mc_get_log_ue(void) |
| { |
| return edac_mc_log_ue; |
| } |
| |
| int edac_mc_get_log_ce(void) |
| { |
| return edac_mc_log_ce; |
| } |
| |
| int edac_mc_get_panic_on_ue(void) |
| { |
| return edac_mc_panic_on_ue; |
| } |
| |
| /* this is temporary */ |
| int edac_mc_get_poll_msec(void) |
| { |
| return edac_mc_poll_msec; |
| } |
| |
| /* Parameter declarations for above */ |
| module_param(edac_mc_panic_on_ue, int, 0644); |
| MODULE_PARM_DESC(edac_mc_panic_on_ue, "Panic on uncorrected error: 0=off 1=on"); |
| module_param(edac_mc_log_ue, int, 0644); |
| MODULE_PARM_DESC(edac_mc_log_ue, |
| "Log uncorrectable error to console: 0=off 1=on"); |
| module_param(edac_mc_log_ce, int, 0644); |
| MODULE_PARM_DESC(edac_mc_log_ce, |
| "Log correctable error to console: 0=off 1=on"); |
| module_param(edac_mc_poll_msec, int, 0644); |
| MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds"); |
| |
| /* |
| * various constants for Memory Controllers |
| */ |
| static const char *mem_types[] = { |
| [MEM_EMPTY] = "Empty", |
| [MEM_RESERVED] = "Reserved", |
| [MEM_UNKNOWN] = "Unknown", |
| [MEM_FPM] = "FPM", |
| [MEM_EDO] = "EDO", |
| [MEM_BEDO] = "BEDO", |
| [MEM_SDR] = "Unbuffered-SDR", |
| [MEM_RDR] = "Registered-SDR", |
| [MEM_DDR] = "Unbuffered-DDR", |
| [MEM_RDDR] = "Registered-DDR", |
| [MEM_RMBS] = "RMBS", |
| [MEM_DDR2] = "Unbuffered-DDR2", |
| [MEM_FB_DDR2] = "FullyBuffered-DDR2", |
| [MEM_RDDR2] = "Registered-DDR2" |
| }; |
| |
| static const char *dev_types[] = { |
| [DEV_UNKNOWN] = "Unknown", |
| [DEV_X1] = "x1", |
| [DEV_X2] = "x2", |
| [DEV_X4] = "x4", |
| [DEV_X8] = "x8", |
| [DEV_X16] = "x16", |
| [DEV_X32] = "x32", |
| [DEV_X64] = "x64" |
| }; |
| |
| static const char *edac_caps[] = { |
| [EDAC_UNKNOWN] = "Unknown", |
| [EDAC_NONE] = "None", |
| [EDAC_RESERVED] = "Reserved", |
| [EDAC_PARITY] = "PARITY", |
| [EDAC_EC] = "EC", |
| [EDAC_SECDED] = "SECDED", |
| [EDAC_S2ECD2ED] = "S2ECD2ED", |
| [EDAC_S4ECD4ED] = "S4ECD4ED", |
| [EDAC_S8ECD8ED] = "S8ECD8ED", |
| [EDAC_S16ECD16ED] = "S16ECD16ED" |
| }; |
| |
| /* sysfs object: |
| * /sys/devices/system/edac/mc |
| */ |
| static struct kobject edac_memctrl_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; |
| |
| /* |
| * /sys/devices/system/edac/mc; |
| * data structures and methods |
| */ |
| static ssize_t memctrl_int_show(void *ptr, char *buffer) |
| { |
| int *value = (int *)ptr; |
| return sprintf(buffer, "%u\n", *value); |
| } |
| |
| static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count) |
| { |
| int *value = (int *)ptr; |
| |
| if (isdigit(*buffer)) |
| *value = simple_strtoul(buffer, NULL, 0); |
| |
| return count; |
| } |
| |
| struct memctrl_dev_attribute { |
| 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) |
| { |
| 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) |
| { |
| 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; |
| } |
| |
| static struct sysfs_ops memctrlfs_ops = { |
| .show = memctrl_dev_show, |
| .store = memctrl_dev_store |
| }; |
| |
| #define MEMCTRL_ATTR(_name,_mode,_show,_store) \ |
| static struct memctrl_dev_attribute attr_##_name = { \ |
| .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| .value = &_name, \ |
| .show = _show, \ |
| .store = _store, \ |
| }; |
| |
| #define MEMCTRL_STRING_ATTR(_name,_data,_mode,_show,_store) \ |
| static struct memctrl_dev_attribute attr_##_name = { \ |
| .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| .value = _data, \ |
| .show = _show, \ |
| .store = _store, \ |
| }; |
| |
| /* csrow<id> control files */ |
| MEMCTRL_ATTR(edac_mc_panic_on_ue, |
| S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store); |
| |
| MEMCTRL_ATTR(edac_mc_log_ue, |
| S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store); |
| |
| MEMCTRL_ATTR(edac_mc_log_ce, |
| S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store); |
| |
| MEMCTRL_ATTR(edac_mc_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_edac_mc_panic_on_ue, |
| &attr_edac_mc_log_ue, |
| &attr_edac_mc_log_ce, |
| &attr_edac_mc_poll_msec, |
| NULL, |
| }; |
| |
| /* Main MC kobject release() function */ |
| static void edac_memctrl_master_release(struct kobject *kobj) |
| { |
| 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, |
| }; |
| |
| /* Initialize the main sysfs entries for edac: |
| * /sys/devices/system/edac |
| * |
| * and children |
| * |
| * Return: 0 SUCCESS |
| * !0 FAILURE |
| */ |
| int edac_sysfs_memctrl_setup(void) |
| { |
| int err = 0; |
| struct sysdev_class *edac_class; |
| |
| debugf1("%s()\n", __func__); |
| |
| /* get the /sys/devices/system/edac class reference */ |
| edac_class = edac_get_edac_class(); |
| if (edac_class == NULL) { |
| debugf1("%s() no edac_class error=%d\n", __func__, err); |
| return err; |
| } |
| |
| /* Init the MC's kobject */ |
| memset(&edac_memctrl_kobj, 0, sizeof(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) { |
| debugf1("%s() Failed to set name '.../edac/mc'\n", __func__); |
| return err; |
| } |
| |
| /* FIXME: maybe new sysdev_create_subdir() */ |
| err = kobject_register(&edac_memctrl_kobj); |
| if (err) { |
| debugf1("%s() Failed to register '.../edac/mc'\n", __func__); |
| return err; |
| } |
| |
| debugf1("%s() Registered '.../edac/mc' kobject\n", __func__); |
| return 0; |
| } |
| |
| /* |
| * MC teardown: |
| * the '..../edac/mc' kobject followed by '..../edac' itself |
| */ |
| void edac_sysfs_memctrl_teardown(void) |
| { |
| debugf0("MC: " __FILE__ ": %s()\n", __func__); |
| |
| /* Unregister the MC's kobject and wait for reference count to reach 0. |
| */ |
| init_completion(&edac_memctrl_kobj_complete); |
| kobject_unregister(&edac_memctrl_kobj); |
| wait_for_completion(&edac_memctrl_kobj_complete); |
| } |
| |
| /* EDAC sysfs CSROW data structures and methods |
| */ |
| |
| /* 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) |
| { |
| return sprintf(data, "%u\n", csrow->ue_count); |
| } |
| |
| static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data, |
| int private) |
| { |
| return sprintf(data, "%u\n", csrow->ce_count); |
| } |
| |
| static ssize_t csrow_size_show(struct csrow_info *csrow, char *data, |
| int private) |
| { |
| return sprintf(data, "%u\n", PAGES_TO_MiB(csrow->nr_pages)); |
| } |
| |
| static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data, |
| int private) |
| { |
| return sprintf(data, "%s\n", mem_types[csrow->mtype]); |
| } |
| |
| static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data, |
| int private) |
| { |
| return sprintf(data, "%s\n", dev_types[csrow->dtype]); |
| } |
| |
| static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data, |
| int private) |
| { |
| return sprintf(data, "%s\n", edac_caps[csrow->edac_mode]); |
| } |
| |
| /* show/store functions for DIMM Label attributes */ |
| static ssize_t channel_dimm_label_show(struct csrow_info *csrow, |
| char *data, int channel) |
| { |
| return snprintf(data, EDAC_MC_LABEL_LEN, "%s", |
| csrow->channels[channel].label); |
| } |
| |
| static ssize_t channel_dimm_label_store(struct csrow_info *csrow, |
| const char *data, |
| size_t count, int channel) |
| { |
| ssize_t max_size = 0; |
| |
| 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'; |
| |
| return max_size; |
| } |
| |
| /* 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, "%u\n", csrow->channels[channel].ce_count); |
| } |
| |
| /* csrow specific attribute structure */ |
| struct csrowdev_attribute { |
| struct attribute attr; |
| 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 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, csrowdev_attr->private); |
| return -EIO; |
| } |
| |
| static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr, |
| 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, csrowdev_attr->private); |
| return -EIO; |
| } |
| |
| static struct sysfs_ops csrowfs_ops = { |
| .show = csrowdev_show, |
| .store = csrowdev_store |
| }; |
| |
| #define CSROWDEV_ATTR(_name,_mode,_show,_store,_private) \ |
| static struct csrowdev_attribute attr_##_name = { \ |
| .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| .show = _show, \ |
| .store = _store, \ |
| .private = _private, \ |
| }; |
| |
| /* 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); |
| |
| /* 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, |
| NULL, |
| }; |
| |
| /* 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; |
| |
| 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 **)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) |
| { |
| int err = 0; |
| int chan; |
| |
| memset(&csrow->kobj, 0, sizeof(csrow->kobj)); |
| |
| /* generate ..../edac/mc/mc<id>/csrow<index> */ |
| |
| 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) |
| goto error_exit; |
| |
| /* Instanstiate the csrow object */ |
| err = kobject_register(&csrow->kobj); |
| if (!err) { |
| /* 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; |
| } |
| |
| /* 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) |
| { |
| int row, chan; |
| |
| mci->ue_noinfo_count = 0; |
| 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; |
| return count; |
| } |
| |
| /* memory scrubbing */ |
| static ssize_t mci_sdram_scrub_rate_store(struct mem_ctl_info *mci, |
| const char *data, size_t count) |
| { |
| u32 bandwidth = -1; |
| |
| if (mci->set_sdram_scrub_rate) { |
| |
| memctrl_int_store(&bandwidth, data, count); |
| |
| if (!(*mci->set_sdram_scrub_rate) (mci, &bandwidth)) { |
| edac_printk(KERN_DEBUG, EDAC_MC, |
| "Scrub rate set successfully, applied: %d\n", |
| bandwidth); |
| } else { |
| /* FIXME: error codes maybe? */ |
| edac_printk(KERN_DEBUG, EDAC_MC, |
| "Scrub rate set FAILED, could not apply: %d\n", |
| bandwidth); |
| } |
| } else { |
| /* FIXME: produce "not implemented" ERROR for user-side. */ |
| edac_printk(KERN_WARNING, EDAC_MC, |
| "Memory scrubbing 'set'control is not implemented!\n"); |
| } |
| return count; |
| } |
| |
| static ssize_t mci_sdram_scrub_rate_show(struct mem_ctl_info *mci, char *data) |
| { |
| u32 bandwidth = -1; |
| |
| if (mci->get_sdram_scrub_rate) { |
| if (!(*mci->get_sdram_scrub_rate) (mci, &bandwidth)) { |
| edac_printk(KERN_DEBUG, EDAC_MC, |
| "Scrub rate successfully, fetched: %d\n", |
| bandwidth); |
| } else { |
| /* FIXME: error codes maybe? */ |
| edac_printk(KERN_DEBUG, EDAC_MC, |
| "Scrub rate fetch FAILED, got: %d\n", |
| bandwidth); |
| } |
| } else { |
| /* FIXME: produce "not implemented" ERROR for user-side. */ |
| edac_printk(KERN_WARNING, EDAC_MC, |
| "Memory scrubbing 'get' control is not implemented\n"); |
| } |
| return sprintf(data, "%d\n", bandwidth); |
| } |
| |
| /* 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); |
| } |
| |
| static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data) |
| { |
| return sprintf(data, "%d\n", mci->ce_count); |
| } |
| |
| static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data) |
| { |
| return sprintf(data, "%d\n", mci->ce_noinfo_count); |
| } |
| |
| static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data) |
| { |
| return sprintf(data, "%d\n", mci->ue_noinfo_count); |
| } |
| |
| static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data) |
| { |
| return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ); |
| } |
| |
| static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data) |
| { |
| return sprintf(data, "%s\n", mci->ctl_name); |
| } |
| |
| static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data) |
| { |
| int total_pages, csrow_idx; |
| |
| for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows; |
| csrow_idx++) { |
| struct csrow_info *csrow = &mci->csrows[csrow_idx]; |
| |
| if (!csrow->nr_pages) |
| continue; |
| |
| total_pages += csrow->nr_pages; |
| } |
| |
| return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages)); |
| } |
| |
| struct mcidev_attribute { |
| struct attribute attr; |
| ssize_t(*show) (struct mem_ctl_info *, char *); |
| ssize_t(*store) (struct mem_ctl_info *, const char *, size_t); |
| }; |
| |
| #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) |
| { |
| 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) |
| { |
| 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 |
| }; |
| |
| #define MCIDEV_ATTR(_name,_mode,_show,_store) \ |
| static struct mcidev_attribute mci_attr_##_name = { \ |
| .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| .show = _show, \ |
| .store = _store, \ |
| }; |
| |
| /* default Control file */ |
| MCIDEV_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store); |
| |
| /* default Attribute files */ |
| MCIDEV_ATTR(mc_name, S_IRUGO, mci_ctl_name_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); |
| |
| /* memory scrubber attribute file */ |
| MCIDEV_ATTR(sdram_scrub_rate, S_IRUGO | S_IWUSR, mci_sdram_scrub_rate_show, |
| mci_sdram_scrub_rate_store); |
| |
| static struct mcidev_attribute *mci_attr[] = { |
| &mci_attr_reset_counters, |
| &mci_attr_mc_name, |
| &mci_attr_size_mb, |
| &mci_attr_seconds_since_reset, |
| &mci_attr_ue_noinfo_count, |
| &mci_attr_ce_noinfo_count, |
| &mci_attr_ue_count, |
| &mci_attr_ce_count, |
| &mci_attr_sdram_scrub_rate, |
| NULL |
| }; |
| |
| /* |
| * Release of a MC controlling instance |
| */ |
| static void edac_mci_instance_release(struct kobject *kobj) |
| { |
| struct mem_ctl_info *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, |
| }; |
| |
| #define EDAC_DEVICE_SYMLINK "device" |
| |
| /* |
| * Create a new Memory Controller kobject instance, |
| * mc<id> under the 'mc' directory |
| * |
| * Return: |
| * 0 Success |
| * !0 Failure |
| */ |
| int edac_create_sysfs_mci_device(struct mem_ctl_info *mci) |
| { |
| int i; |
| int err; |
| struct csrow_info *csrow; |
| struct kobject *edac_mci_kobj = &mci->edac_mci_kobj; |
| |
| debugf0("%s() idx=%d\n", __func__, mci->mc_idx); |
| memset(edac_mci_kobj, 0, sizeof(*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; |
| |
| /* link to our parent the '..../edac/mc' object */ |
| edac_mci_kobj->parent = &edac_memctrl_kobj; |
| edac_mci_kobj->ktype = &ktype_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->dev->kobj, |
| EDAC_DEVICE_SYMLINK); |
| 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 fail1; |
| } |
| } |
| |
| return 0; |
| |
| /* CSROW error: backout what has already been registered, */ |
| fail1: |
| for (i--; i >= 0; i--) { |
| if (csrow->nr_pages > 0) { |
| init_completion(&csrow->kobj_complete); |
| kobject_unregister(&mci->csrows[i].kobj); |
| wait_for_completion(&csrow->kobj_complete); |
| } |
| } |
| |
| fail0: |
| init_completion(&mci->kobj_complete); |
| kobject_unregister(edac_mci_kobj); |
| wait_for_completion(&mci->kobj_complete); |
| return err; |
| } |
| |
| /* |
| * remove a Memory Controller instance |
| */ |
| void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci) |
| { |
| int i; |
| |
| debugf0("%s()\n", __func__); |
| |
| /* remove all csrow kobjects */ |
| for (i = 0; i < mci->nr_csrows; i++) { |
| if (mci->csrows[i].nr_pages > 0) { |
| init_completion(&mci->csrows[i].kobj_complete); |
| kobject_unregister(&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); |
| wait_for_completion(&mci->kobj_complete); |
| } |