| /* |
| * edac_mc kernel module |
| * (C) 2005-2007 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> www.softwarebitmaker.com |
| * |
| * (c) 2012-2013 - Mauro Carvalho Chehab <mchehab@redhat.com> |
| * The entire API were re-written, and ported to use struct device |
| * |
| */ |
| |
| #include <linux/ctype.h> |
| #include <linux/slab.h> |
| #include <linux/edac.h> |
| #include <linux/bug.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/uaccess.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; |
| 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; |
| } |
| |
| static int edac_set_poll_msec(const char *val, struct kernel_param *kp) |
| { |
| unsigned long l; |
| int ret; |
| |
| if (!val) |
| return -EINVAL; |
| |
| ret = kstrtoul(val, 0, &l); |
| if (ret) |
| return ret; |
| |
| if (l < 1000) |
| return -EINVAL; |
| |
| *((unsigned long *)kp->arg) = l; |
| |
| /* notify edac_mc engine to reset the poll period */ |
| edac_mc_reset_delay_period(l); |
| |
| return 0; |
| } |
| |
| /* 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_call(edac_mc_poll_msec, edac_set_poll_msec, param_get_int, |
| &edac_mc_poll_msec, 0644); |
| MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds"); |
| |
| static struct device *mci_pdev; |
| |
| /* |
| * various constants for Memory Controllers |
| */ |
| static const char * const 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", |
| [MEM_XDR] = "XDR", |
| [MEM_DDR3] = "Unbuffered-DDR3", |
| [MEM_RDDR3] = "Registered-DDR3" |
| }; |
| |
| static const char * const 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 * const 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" |
| }; |
| |
| #ifdef CONFIG_EDAC_LEGACY_SYSFS |
| /* |
| * EDAC sysfs CSROW data structures and methods |
| */ |
| |
| #define to_csrow(k) container_of(k, struct csrow_info, dev) |
| |
| /* |
| * We need it to avoid namespace conflicts between the legacy API |
| * and the per-dimm/per-rank one |
| */ |
| #define DEVICE_ATTR_LEGACY(_name, _mode, _show, _store) \ |
| static struct device_attribute dev_attr_legacy_##_name = __ATTR(_name, _mode, _show, _store) |
| |
| struct dev_ch_attribute { |
| struct device_attribute attr; |
| int channel; |
| }; |
| |
| #define DEVICE_CHANNEL(_name, _mode, _show, _store, _var) \ |
| struct dev_ch_attribute dev_attr_legacy_##_name = \ |
| { __ATTR(_name, _mode, _show, _store), (_var) } |
| |
| #define to_channel(k) (container_of(k, struct dev_ch_attribute, attr)->channel) |
| |
| /* Set of more default csrow<id> attribute show/store functions */ |
| static ssize_t csrow_ue_count_show(struct device *dev, |
| struct device_attribute *mattr, char *data) |
| { |
| struct csrow_info *csrow = to_csrow(dev); |
| |
| return sprintf(data, "%u\n", csrow->ue_count); |
| } |
| |
| static ssize_t csrow_ce_count_show(struct device *dev, |
| struct device_attribute *mattr, char *data) |
| { |
| struct csrow_info *csrow = to_csrow(dev); |
| |
| return sprintf(data, "%u\n", csrow->ce_count); |
| } |
| |
| static ssize_t csrow_size_show(struct device *dev, |
| struct device_attribute *mattr, char *data) |
| { |
| struct csrow_info *csrow = to_csrow(dev); |
| int i; |
| u32 nr_pages = 0; |
| |
| for (i = 0; i < csrow->nr_channels; i++) |
| nr_pages += csrow->channels[i]->dimm->nr_pages; |
| return sprintf(data, "%u\n", PAGES_TO_MiB(nr_pages)); |
| } |
| |
| static ssize_t csrow_mem_type_show(struct device *dev, |
| struct device_attribute *mattr, char *data) |
| { |
| struct csrow_info *csrow = to_csrow(dev); |
| |
| return sprintf(data, "%s\n", mem_types[csrow->channels[0]->dimm->mtype]); |
| } |
| |
| static ssize_t csrow_dev_type_show(struct device *dev, |
| struct device_attribute *mattr, char *data) |
| { |
| struct csrow_info *csrow = to_csrow(dev); |
| |
| return sprintf(data, "%s\n", dev_types[csrow->channels[0]->dimm->dtype]); |
| } |
| |
| static ssize_t csrow_edac_mode_show(struct device *dev, |
| struct device_attribute *mattr, |
| char *data) |
| { |
| struct csrow_info *csrow = to_csrow(dev); |
| |
| return sprintf(data, "%s\n", edac_caps[csrow->channels[0]->dimm->edac_mode]); |
| } |
| |
| /* show/store functions for DIMM Label attributes */ |
| static ssize_t channel_dimm_label_show(struct device *dev, |
| struct device_attribute *mattr, |
| char *data) |
| { |
| struct csrow_info *csrow = to_csrow(dev); |
| unsigned chan = to_channel(mattr); |
| struct rank_info *rank = csrow->channels[chan]; |
| |
| /* if field has not been initialized, there is nothing to send */ |
| if (!rank->dimm->label[0]) |
| return 0; |
| |
| return snprintf(data, EDAC_MC_LABEL_LEN, "%s\n", |
| rank->dimm->label); |
| } |
| |
| static ssize_t channel_dimm_label_store(struct device *dev, |
| struct device_attribute *mattr, |
| const char *data, size_t count) |
| { |
| struct csrow_info *csrow = to_csrow(dev); |
| unsigned chan = to_channel(mattr); |
| struct rank_info *rank = csrow->channels[chan]; |
| |
| ssize_t max_size = 0; |
| |
| max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1); |
| strncpy(rank->dimm->label, data, max_size); |
| rank->dimm->label[max_size] = '\0'; |
| |
| return max_size; |
| } |
| |
| /* show function for dynamic chX_ce_count attribute */ |
| static ssize_t channel_ce_count_show(struct device *dev, |
| struct device_attribute *mattr, char *data) |
| { |
| struct csrow_info *csrow = to_csrow(dev); |
| unsigned chan = to_channel(mattr); |
| struct rank_info *rank = csrow->channels[chan]; |
| |
| return sprintf(data, "%u\n", rank->ce_count); |
| } |
| |
| /* cwrow<id>/attribute files */ |
| DEVICE_ATTR_LEGACY(size_mb, S_IRUGO, csrow_size_show, NULL); |
| DEVICE_ATTR_LEGACY(dev_type, S_IRUGO, csrow_dev_type_show, NULL); |
| DEVICE_ATTR_LEGACY(mem_type, S_IRUGO, csrow_mem_type_show, NULL); |
| DEVICE_ATTR_LEGACY(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL); |
| DEVICE_ATTR_LEGACY(ue_count, S_IRUGO, csrow_ue_count_show, NULL); |
| DEVICE_ATTR_LEGACY(ce_count, S_IRUGO, csrow_ce_count_show, NULL); |
| |
| /* default attributes of the CSROW<id> object */ |
| static struct attribute *csrow_attrs[] = { |
| &dev_attr_legacy_dev_type.attr, |
| &dev_attr_legacy_mem_type.attr, |
| &dev_attr_legacy_edac_mode.attr, |
| &dev_attr_legacy_size_mb.attr, |
| &dev_attr_legacy_ue_count.attr, |
| &dev_attr_legacy_ce_count.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group csrow_attr_grp = { |
| .attrs = csrow_attrs, |
| }; |
| |
| static const struct attribute_group *csrow_attr_groups[] = { |
| &csrow_attr_grp, |
| NULL |
| }; |
| |
| static void csrow_attr_release(struct device *dev) |
| { |
| struct csrow_info *csrow = container_of(dev, struct csrow_info, dev); |
| |
| edac_dbg(1, "Releasing csrow device %s\n", dev_name(dev)); |
| kfree(csrow); |
| } |
| |
| static struct device_type csrow_attr_type = { |
| .groups = csrow_attr_groups, |
| .release = csrow_attr_release, |
| }; |
| |
| /* |
| * possible dynamic channel DIMM Label attribute files |
| * |
| */ |
| |
| #define EDAC_NR_CHANNELS 6 |
| |
| DEVICE_CHANNEL(ch0_dimm_label, S_IRUGO | S_IWUSR, |
| channel_dimm_label_show, channel_dimm_label_store, 0); |
| DEVICE_CHANNEL(ch1_dimm_label, S_IRUGO | S_IWUSR, |
| channel_dimm_label_show, channel_dimm_label_store, 1); |
| DEVICE_CHANNEL(ch2_dimm_label, S_IRUGO | S_IWUSR, |
| channel_dimm_label_show, channel_dimm_label_store, 2); |
| DEVICE_CHANNEL(ch3_dimm_label, S_IRUGO | S_IWUSR, |
| channel_dimm_label_show, channel_dimm_label_store, 3); |
| DEVICE_CHANNEL(ch4_dimm_label, S_IRUGO | S_IWUSR, |
| channel_dimm_label_show, channel_dimm_label_store, 4); |
| DEVICE_CHANNEL(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 device_attribute *dynamic_csrow_dimm_attr[] = { |
| &dev_attr_legacy_ch0_dimm_label.attr, |
| &dev_attr_legacy_ch1_dimm_label.attr, |
| &dev_attr_legacy_ch2_dimm_label.attr, |
| &dev_attr_legacy_ch3_dimm_label.attr, |
| &dev_attr_legacy_ch4_dimm_label.attr, |
| &dev_attr_legacy_ch5_dimm_label.attr |
| }; |
| |
| /* possible dynamic channel ce_count attribute files */ |
| DEVICE_CHANNEL(ch0_ce_count, S_IRUGO, |
| channel_ce_count_show, NULL, 0); |
| DEVICE_CHANNEL(ch1_ce_count, S_IRUGO, |
| channel_ce_count_show, NULL, 1); |
| DEVICE_CHANNEL(ch2_ce_count, S_IRUGO, |
| channel_ce_count_show, NULL, 2); |
| DEVICE_CHANNEL(ch3_ce_count, S_IRUGO, |
| channel_ce_count_show, NULL, 3); |
| DEVICE_CHANNEL(ch4_ce_count, S_IRUGO, |
| channel_ce_count_show, NULL, 4); |
| DEVICE_CHANNEL(ch5_ce_count, S_IRUGO, |
| channel_ce_count_show, NULL, 5); |
| |
| /* Total possible dynamic ce_count attribute file table */ |
| static struct device_attribute *dynamic_csrow_ce_count_attr[] = { |
| &dev_attr_legacy_ch0_ce_count.attr, |
| &dev_attr_legacy_ch1_ce_count.attr, |
| &dev_attr_legacy_ch2_ce_count.attr, |
| &dev_attr_legacy_ch3_ce_count.attr, |
| &dev_attr_legacy_ch4_ce_count.attr, |
| &dev_attr_legacy_ch5_ce_count.attr |
| }; |
| |
| static inline int nr_pages_per_csrow(struct csrow_info *csrow) |
| { |
| int chan, nr_pages = 0; |
| |
| for (chan = 0; chan < csrow->nr_channels; chan++) |
| nr_pages += csrow->channels[chan]->dimm->nr_pages; |
| |
| return nr_pages; |
| } |
| |
| /* Create a CSROW object under specifed edac_mc_device */ |
| static int edac_create_csrow_object(struct mem_ctl_info *mci, |
| struct csrow_info *csrow, int index) |
| { |
| int err, chan; |
| |
| if (csrow->nr_channels >= EDAC_NR_CHANNELS) |
| return -ENODEV; |
| |
| csrow->dev.type = &csrow_attr_type; |
| csrow->dev.bus = mci->bus; |
| device_initialize(&csrow->dev); |
| csrow->dev.parent = &mci->dev; |
| csrow->mci = mci; |
| dev_set_name(&csrow->dev, "csrow%d", index); |
| dev_set_drvdata(&csrow->dev, csrow); |
| |
| edac_dbg(0, "creating (virtual) csrow node %s\n", |
| dev_name(&csrow->dev)); |
| |
| err = device_add(&csrow->dev); |
| if (err < 0) |
| return err; |
| |
| for (chan = 0; chan < csrow->nr_channels; chan++) { |
| /* Only expose populated DIMMs */ |
| if (!csrow->channels[chan]->dimm->nr_pages) |
| continue; |
| err = device_create_file(&csrow->dev, |
| dynamic_csrow_dimm_attr[chan]); |
| if (err < 0) |
| goto error; |
| err = device_create_file(&csrow->dev, |
| dynamic_csrow_ce_count_attr[chan]); |
| if (err < 0) { |
| device_remove_file(&csrow->dev, |
| dynamic_csrow_dimm_attr[chan]); |
| goto error; |
| } |
| } |
| |
| return 0; |
| |
| error: |
| for (--chan; chan >= 0; chan--) { |
| device_remove_file(&csrow->dev, |
| dynamic_csrow_dimm_attr[chan]); |
| device_remove_file(&csrow->dev, |
| dynamic_csrow_ce_count_attr[chan]); |
| } |
| put_device(&csrow->dev); |
| |
| return err; |
| } |
| |
| /* Create a CSROW object under specifed edac_mc_device */ |
| static int edac_create_csrow_objects(struct mem_ctl_info *mci) |
| { |
| int err, i, chan; |
| struct csrow_info *csrow; |
| |
| for (i = 0; i < mci->nr_csrows; i++) { |
| csrow = mci->csrows[i]; |
| if (!nr_pages_per_csrow(csrow)) |
| continue; |
| err = edac_create_csrow_object(mci, mci->csrows[i], i); |
| if (err < 0) { |
| edac_dbg(1, |
| "failure: create csrow objects for csrow %d\n", |
| i); |
| goto error; |
| } |
| } |
| return 0; |
| |
| error: |
| for (--i; i >= 0; i--) { |
| csrow = mci->csrows[i]; |
| if (!nr_pages_per_csrow(csrow)) |
| continue; |
| for (chan = csrow->nr_channels - 1; chan >= 0; chan--) { |
| if (!csrow->channels[chan]->dimm->nr_pages) |
| continue; |
| device_remove_file(&csrow->dev, |
| dynamic_csrow_dimm_attr[chan]); |
| device_remove_file(&csrow->dev, |
| dynamic_csrow_ce_count_attr[chan]); |
| } |
| put_device(&mci->csrows[i]->dev); |
| } |
| |
| return err; |
| } |
| |
| static void edac_delete_csrow_objects(struct mem_ctl_info *mci) |
| { |
| int i, chan; |
| struct csrow_info *csrow; |
| |
| for (i = mci->nr_csrows - 1; i >= 0; i--) { |
| csrow = mci->csrows[i]; |
| if (!nr_pages_per_csrow(csrow)) |
| continue; |
| for (chan = csrow->nr_channels - 1; chan >= 0; chan--) { |
| if (!csrow->channels[chan]->dimm->nr_pages) |
| continue; |
| edac_dbg(1, "Removing csrow %d channel %d sysfs nodes\n", |
| i, chan); |
| device_remove_file(&csrow->dev, |
| dynamic_csrow_dimm_attr[chan]); |
| device_remove_file(&csrow->dev, |
| dynamic_csrow_ce_count_attr[chan]); |
| } |
| device_unregister(&mci->csrows[i]->dev); |
| } |
| } |
| #endif |
| |
| /* |
| * Per-dimm (or per-rank) devices |
| */ |
| |
| #define to_dimm(k) container_of(k, struct dimm_info, dev) |
| |
| /* show/store functions for DIMM Label attributes */ |
| static ssize_t dimmdev_location_show(struct device *dev, |
| struct device_attribute *mattr, char *data) |
| { |
| struct dimm_info *dimm = to_dimm(dev); |
| |
| return edac_dimm_info_location(dimm, data, PAGE_SIZE); |
| } |
| |
| static ssize_t dimmdev_label_show(struct device *dev, |
| struct device_attribute *mattr, char *data) |
| { |
| struct dimm_info *dimm = to_dimm(dev); |
| |
| /* if field has not been initialized, there is nothing to send */ |
| if (!dimm->label[0]) |
| return 0; |
| |
| return snprintf(data, EDAC_MC_LABEL_LEN, "%s\n", dimm->label); |
| } |
| |
| static ssize_t dimmdev_label_store(struct device *dev, |
| struct device_attribute *mattr, |
| const char *data, |
| size_t count) |
| { |
| struct dimm_info *dimm = to_dimm(dev); |
| |
| ssize_t max_size = 0; |
| |
| max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1); |
| strncpy(dimm->label, data, max_size); |
| dimm->label[max_size] = '\0'; |
| |
| return max_size; |
| } |
| |
| static ssize_t dimmdev_size_show(struct device *dev, |
| struct device_attribute *mattr, char *data) |
| { |
| struct dimm_info *dimm = to_dimm(dev); |
| |
| return sprintf(data, "%u\n", PAGES_TO_MiB(dimm->nr_pages)); |
| } |
| |
| static ssize_t dimmdev_mem_type_show(struct device *dev, |
| struct device_attribute *mattr, char *data) |
| { |
| struct dimm_info *dimm = to_dimm(dev); |
| |
| return sprintf(data, "%s\n", mem_types[dimm->mtype]); |
| } |
| |
| static ssize_t dimmdev_dev_type_show(struct device *dev, |
| struct device_attribute *mattr, char *data) |
| { |
| struct dimm_info *dimm = to_dimm(dev); |
| |
| return sprintf(data, "%s\n", dev_types[dimm->dtype]); |
| } |
| |
| static ssize_t dimmdev_edac_mode_show(struct device *dev, |
| struct device_attribute *mattr, |
| char *data) |
| { |
| struct dimm_info *dimm = to_dimm(dev); |
| |
| return sprintf(data, "%s\n", edac_caps[dimm->edac_mode]); |
| } |
| |
| /* dimm/rank attribute files */ |
| static DEVICE_ATTR(dimm_label, S_IRUGO | S_IWUSR, |
| dimmdev_label_show, dimmdev_label_store); |
| static DEVICE_ATTR(dimm_location, S_IRUGO, dimmdev_location_show, NULL); |
| static DEVICE_ATTR(size, S_IRUGO, dimmdev_size_show, NULL); |
| static DEVICE_ATTR(dimm_mem_type, S_IRUGO, dimmdev_mem_type_show, NULL); |
| static DEVICE_ATTR(dimm_dev_type, S_IRUGO, dimmdev_dev_type_show, NULL); |
| static DEVICE_ATTR(dimm_edac_mode, S_IRUGO, dimmdev_edac_mode_show, NULL); |
| |
| /* attributes of the dimm<id>/rank<id> object */ |
| static struct attribute *dimm_attrs[] = { |
| &dev_attr_dimm_label.attr, |
| &dev_attr_dimm_location.attr, |
| &dev_attr_size.attr, |
| &dev_attr_dimm_mem_type.attr, |
| &dev_attr_dimm_dev_type.attr, |
| &dev_attr_dimm_edac_mode.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group dimm_attr_grp = { |
| .attrs = dimm_attrs, |
| }; |
| |
| static const struct attribute_group *dimm_attr_groups[] = { |
| &dimm_attr_grp, |
| NULL |
| }; |
| |
| static void dimm_attr_release(struct device *dev) |
| { |
| struct dimm_info *dimm = container_of(dev, struct dimm_info, dev); |
| |
| edac_dbg(1, "Releasing dimm device %s\n", dev_name(dev)); |
| kfree(dimm); |
| } |
| |
| static struct device_type dimm_attr_type = { |
| .groups = dimm_attr_groups, |
| .release = dimm_attr_release, |
| }; |
| |
| /* Create a DIMM object under specifed memory controller device */ |
| static int edac_create_dimm_object(struct mem_ctl_info *mci, |
| struct dimm_info *dimm, |
| int index) |
| { |
| int err; |
| dimm->mci = mci; |
| |
| dimm->dev.type = &dimm_attr_type; |
| dimm->dev.bus = mci->bus; |
| device_initialize(&dimm->dev); |
| |
| dimm->dev.parent = &mci->dev; |
| if (mci->csbased) |
| dev_set_name(&dimm->dev, "rank%d", index); |
| else |
| dev_set_name(&dimm->dev, "dimm%d", index); |
| dev_set_drvdata(&dimm->dev, dimm); |
| pm_runtime_forbid(&mci->dev); |
| |
| err = device_add(&dimm->dev); |
| |
| edac_dbg(0, "creating rank/dimm device %s\n", dev_name(&dimm->dev)); |
| |
| return err; |
| } |
| |
| /* |
| * Memory controller device |
| */ |
| |
| #define to_mci(k) container_of(k, struct mem_ctl_info, dev) |
| |
| static ssize_t mci_reset_counters_store(struct device *dev, |
| struct device_attribute *mattr, |
| const char *data, size_t count) |
| { |
| struct mem_ctl_info *mci = to_mci(dev); |
| int cnt, row, chan, i; |
| mci->ue_mc = 0; |
| mci->ce_mc = 0; |
| mci->ue_noinfo_count = 0; |
| mci->ce_noinfo_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; |
| } |
| |
| cnt = 1; |
| for (i = 0; i < mci->n_layers; i++) { |
| cnt *= mci->layers[i].size; |
| memset(mci->ce_per_layer[i], 0, cnt * sizeof(u32)); |
| memset(mci->ue_per_layer[i], 0, cnt * sizeof(u32)); |
| } |
| |
| mci->start_time = jiffies; |
| return count; |
| } |
| |
| /* Memory scrubbing interface: |
| * |
| * A MC driver can limit the scrubbing bandwidth based on the CPU type. |
| * Therefore, ->set_sdram_scrub_rate should be made to return the actual |
| * bandwidth that is accepted or 0 when scrubbing is to be disabled. |
| * |
| * Negative value still means that an error has occurred while setting |
| * the scrub rate. |
| */ |
| static ssize_t mci_sdram_scrub_rate_store(struct device *dev, |
| struct device_attribute *mattr, |
| const char *data, size_t count) |
| { |
| struct mem_ctl_info *mci = to_mci(dev); |
| unsigned long bandwidth = 0; |
| int new_bw = 0; |
| |
| if (strict_strtoul(data, 10, &bandwidth) < 0) |
| return -EINVAL; |
| |
| new_bw = mci->set_sdram_scrub_rate(mci, bandwidth); |
| if (new_bw < 0) { |
| edac_printk(KERN_WARNING, EDAC_MC, |
| "Error setting scrub rate to: %lu\n", bandwidth); |
| return -EINVAL; |
| } |
| |
| return count; |
| } |
| |
| /* |
| * ->get_sdram_scrub_rate() return value semantics same as above. |
| */ |
| static ssize_t mci_sdram_scrub_rate_show(struct device *dev, |
| struct device_attribute *mattr, |
| char *data) |
| { |
| struct mem_ctl_info *mci = to_mci(dev); |
| int bandwidth = 0; |
| |
| bandwidth = mci->get_sdram_scrub_rate(mci); |
| if (bandwidth < 0) { |
| edac_printk(KERN_DEBUG, EDAC_MC, "Error reading scrub rate\n"); |
| return bandwidth; |
| } |
| |
| return sprintf(data, "%d\n", bandwidth); |
| } |
| |
| /* default attribute files for the MCI object */ |
| static ssize_t mci_ue_count_show(struct device *dev, |
| struct device_attribute *mattr, |
| char *data) |
| { |
| struct mem_ctl_info *mci = to_mci(dev); |
| |
| return sprintf(data, "%d\n", mci->ue_mc); |
| } |
| |
| static ssize_t mci_ce_count_show(struct device *dev, |
| struct device_attribute *mattr, |
| char *data) |
| { |
| struct mem_ctl_info *mci = to_mci(dev); |
| |
| return sprintf(data, "%d\n", mci->ce_mc); |
| } |
| |
| static ssize_t mci_ce_noinfo_show(struct device *dev, |
| struct device_attribute *mattr, |
| char *data) |
| { |
| struct mem_ctl_info *mci = to_mci(dev); |
| |
| return sprintf(data, "%d\n", mci->ce_noinfo_count); |
| } |
| |
| static ssize_t mci_ue_noinfo_show(struct device *dev, |
| struct device_attribute *mattr, |
| char *data) |
| { |
| struct mem_ctl_info *mci = to_mci(dev); |
| |
| return sprintf(data, "%d\n", mci->ue_noinfo_count); |
| } |
| |
| static ssize_t mci_seconds_show(struct device *dev, |
| struct device_attribute *mattr, |
| char *data) |
| { |
| struct mem_ctl_info *mci = to_mci(dev); |
| |
| return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ); |
| } |
| |
| static ssize_t mci_ctl_name_show(struct device *dev, |
| struct device_attribute *mattr, |
| char *data) |
| { |
| struct mem_ctl_info *mci = to_mci(dev); |
| |
| return sprintf(data, "%s\n", mci->ctl_name); |
| } |
| |
| static ssize_t mci_size_mb_show(struct device *dev, |
| struct device_attribute *mattr, |
| char *data) |
| { |
| struct mem_ctl_info *mci = to_mci(dev); |
| int total_pages = 0, csrow_idx, j; |
| |
| for (csrow_idx = 0; csrow_idx < mci->nr_csrows; csrow_idx++) { |
| struct csrow_info *csrow = mci->csrows[csrow_idx]; |
| |
| for (j = 0; j < csrow->nr_channels; j++) { |
| struct dimm_info *dimm = csrow->channels[j]->dimm; |
| |
| total_pages += dimm->nr_pages; |
| } |
| } |
| |
| return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages)); |
| } |
| |
| static ssize_t mci_max_location_show(struct device *dev, |
| struct device_attribute *mattr, |
| char *data) |
| { |
| struct mem_ctl_info *mci = to_mci(dev); |
| int i; |
| char *p = data; |
| |
| for (i = 0; i < mci->n_layers; i++) { |
| p += sprintf(p, "%s %d ", |
| edac_layer_name[mci->layers[i].type], |
| mci->layers[i].size - 1); |
| } |
| |
| return p - data; |
| } |
| |
| #ifdef CONFIG_EDAC_DEBUG |
| static ssize_t edac_fake_inject_write(struct file *file, |
| const char __user *data, |
| size_t count, loff_t *ppos) |
| { |
| struct device *dev = file->private_data; |
| struct mem_ctl_info *mci = to_mci(dev); |
| static enum hw_event_mc_err_type type; |
| u16 errcount = mci->fake_inject_count; |
| |
| if (!errcount) |
| errcount = 1; |
| |
| type = mci->fake_inject_ue ? HW_EVENT_ERR_UNCORRECTED |
| : HW_EVENT_ERR_CORRECTED; |
| |
| printk(KERN_DEBUG |
| "Generating %d %s fake error%s to %d.%d.%d to test core handling. NOTE: this won't test the driver-specific decoding logic.\n", |
| errcount, |
| (type == HW_EVENT_ERR_UNCORRECTED) ? "UE" : "CE", |
| errcount > 1 ? "s" : "", |
| mci->fake_inject_layer[0], |
| mci->fake_inject_layer[1], |
| mci->fake_inject_layer[2] |
| ); |
| edac_mc_handle_error(type, mci, errcount, 0, 0, 0, |
| mci->fake_inject_layer[0], |
| mci->fake_inject_layer[1], |
| mci->fake_inject_layer[2], |
| "FAKE ERROR", "for EDAC testing only"); |
| |
| return count; |
| } |
| |
| static const struct file_operations debug_fake_inject_fops = { |
| .open = simple_open, |
| .write = edac_fake_inject_write, |
| .llseek = generic_file_llseek, |
| }; |
| #endif |
| |
| /* default Control file */ |
| DEVICE_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store); |
| |
| /* default Attribute files */ |
| DEVICE_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL); |
| DEVICE_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL); |
| DEVICE_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL); |
| DEVICE_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL); |
| DEVICE_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL); |
| DEVICE_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL); |
| DEVICE_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL); |
| DEVICE_ATTR(max_location, S_IRUGO, mci_max_location_show, NULL); |
| |
| /* memory scrubber attribute file */ |
| DEVICE_ATTR(sdram_scrub_rate, 0, NULL, NULL); |
| |
| static struct attribute *mci_attrs[] = { |
| &dev_attr_reset_counters.attr, |
| &dev_attr_mc_name.attr, |
| &dev_attr_size_mb.attr, |
| &dev_attr_seconds_since_reset.attr, |
| &dev_attr_ue_noinfo_count.attr, |
| &dev_attr_ce_noinfo_count.attr, |
| &dev_attr_ue_count.attr, |
| &dev_attr_ce_count.attr, |
| &dev_attr_max_location.attr, |
| NULL |
| }; |
| |
| static struct attribute_group mci_attr_grp = { |
| .attrs = mci_attrs, |
| }; |
| |
| static const struct attribute_group *mci_attr_groups[] = { |
| &mci_attr_grp, |
| NULL |
| }; |
| |
| static void mci_attr_release(struct device *dev) |
| { |
| struct mem_ctl_info *mci = container_of(dev, struct mem_ctl_info, dev); |
| |
| edac_dbg(1, "Releasing csrow device %s\n", dev_name(dev)); |
| kfree(mci); |
| } |
| |
| static struct device_type mci_attr_type = { |
| .groups = mci_attr_groups, |
| .release = mci_attr_release, |
| }; |
| |
| #ifdef CONFIG_EDAC_DEBUG |
| static struct dentry *edac_debugfs; |
| |
| int __init edac_debugfs_init(void) |
| { |
| edac_debugfs = debugfs_create_dir("edac", NULL); |
| if (IS_ERR(edac_debugfs)) { |
| edac_debugfs = NULL; |
| return -ENOMEM; |
| } |
| return 0; |
| } |
| |
| void __exit edac_debugfs_exit(void) |
| { |
| debugfs_remove(edac_debugfs); |
| } |
| |
| int edac_create_debug_nodes(struct mem_ctl_info *mci) |
| { |
| struct dentry *d, *parent; |
| char name[80]; |
| int i; |
| |
| if (!edac_debugfs) |
| return -ENODEV; |
| |
| d = debugfs_create_dir(mci->dev.kobj.name, edac_debugfs); |
| if (!d) |
| return -ENOMEM; |
| parent = d; |
| |
| for (i = 0; i < mci->n_layers; i++) { |
| sprintf(name, "fake_inject_%s", |
| edac_layer_name[mci->layers[i].type]); |
| d = debugfs_create_u8(name, S_IRUGO | S_IWUSR, parent, |
| &mci->fake_inject_layer[i]); |
| if (!d) |
| goto nomem; |
| } |
| |
| d = debugfs_create_bool("fake_inject_ue", S_IRUGO | S_IWUSR, parent, |
| &mci->fake_inject_ue); |
| if (!d) |
| goto nomem; |
| |
| d = debugfs_create_u16("fake_inject_count", S_IRUGO | S_IWUSR, parent, |
| &mci->fake_inject_count); |
| if (!d) |
| goto nomem; |
| |
| d = debugfs_create_file("fake_inject", S_IWUSR, parent, |
| &mci->dev, |
| &debug_fake_inject_fops); |
| if (!d) |
| goto nomem; |
| |
| mci->debugfs = parent; |
| return 0; |
| nomem: |
| debugfs_remove(mci->debugfs); |
| return -ENOMEM; |
| } |
| #endif |
| |
| /* |
| * 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, err; |
| |
| /* |
| * The memory controller needs its own bus, in order to avoid |
| * namespace conflicts at /sys/bus/edac. |
| */ |
| mci->bus->name = kasprintf(GFP_KERNEL, "mc%d", mci->mc_idx); |
| if (!mci->bus->name) |
| return -ENOMEM; |
| |
| edac_dbg(0, "creating bus %s\n", mci->bus->name); |
| |
| err = bus_register(mci->bus); |
| if (err < 0) |
| return err; |
| |
| /* get the /sys/devices/system/edac subsys reference */ |
| mci->dev.type = &mci_attr_type; |
| device_initialize(&mci->dev); |
| |
| mci->dev.parent = mci_pdev; |
| mci->dev.bus = mci->bus; |
| dev_set_name(&mci->dev, "mc%d", mci->mc_idx); |
| dev_set_drvdata(&mci->dev, mci); |
| pm_runtime_forbid(&mci->dev); |
| |
| edac_dbg(0, "creating device %s\n", dev_name(&mci->dev)); |
| err = device_add(&mci->dev); |
| if (err < 0) { |
| edac_dbg(1, "failure: create device %s\n", dev_name(&mci->dev)); |
| bus_unregister(mci->bus); |
| kfree(mci->bus->name); |
| return err; |
| } |
| |
| if (mci->set_sdram_scrub_rate || mci->get_sdram_scrub_rate) { |
| if (mci->get_sdram_scrub_rate) { |
| dev_attr_sdram_scrub_rate.attr.mode |= S_IRUGO; |
| dev_attr_sdram_scrub_rate.show = &mci_sdram_scrub_rate_show; |
| } |
| if (mci->set_sdram_scrub_rate) { |
| dev_attr_sdram_scrub_rate.attr.mode |= S_IWUSR; |
| dev_attr_sdram_scrub_rate.store = &mci_sdram_scrub_rate_store; |
| } |
| err = device_create_file(&mci->dev, |
| &dev_attr_sdram_scrub_rate); |
| if (err) { |
| edac_dbg(1, "failure: create sdram_scrub_rate\n"); |
| goto fail2; |
| } |
| } |
| /* |
| * Create the dimm/rank devices |
| */ |
| for (i = 0; i < mci->tot_dimms; i++) { |
| struct dimm_info *dimm = mci->dimms[i]; |
| /* Only expose populated DIMMs */ |
| if (dimm->nr_pages == 0) |
| continue; |
| #ifdef CONFIG_EDAC_DEBUG |
| edac_dbg(1, "creating dimm%d, located at ", i); |
| if (edac_debug_level >= 1) { |
| int lay; |
| for (lay = 0; lay < mci->n_layers; lay++) |
| printk(KERN_CONT "%s %d ", |
| edac_layer_name[mci->layers[lay].type], |
| dimm->location[lay]); |
| printk(KERN_CONT "\n"); |
| } |
| #endif |
| err = edac_create_dimm_object(mci, dimm, i); |
| if (err) { |
| edac_dbg(1, "failure: create dimm %d obj\n", i); |
| goto fail; |
| } |
| } |
| |
| #ifdef CONFIG_EDAC_LEGACY_SYSFS |
| err = edac_create_csrow_objects(mci); |
| if (err < 0) |
| goto fail; |
| #endif |
| |
| #ifdef CONFIG_EDAC_DEBUG |
| edac_create_debug_nodes(mci); |
| #endif |
| return 0; |
| |
| fail: |
| for (i--; i >= 0; i--) { |
| struct dimm_info *dimm = mci->dimms[i]; |
| if (dimm->nr_pages == 0) |
| continue; |
| device_unregister(&dimm->dev); |
| } |
| fail2: |
| device_unregister(&mci->dev); |
| bus_unregister(mci->bus); |
| kfree(mci->bus->name); |
| return err; |
| } |
| |
| /* |
| * remove a Memory Controller instance |
| */ |
| void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci) |
| { |
| int i; |
| |
| edac_dbg(0, "\n"); |
| |
| #ifdef CONFIG_EDAC_DEBUG |
| debugfs_remove(mci->debugfs); |
| #endif |
| #ifdef CONFIG_EDAC_LEGACY_SYSFS |
| edac_delete_csrow_objects(mci); |
| #endif |
| |
| for (i = 0; i < mci->tot_dimms; i++) { |
| struct dimm_info *dimm = mci->dimms[i]; |
| if (dimm->nr_pages == 0) |
| continue; |
| edac_dbg(0, "removing device %s\n", dev_name(&dimm->dev)); |
| device_unregister(&dimm->dev); |
| } |
| } |
| |
| void edac_unregister_sysfs(struct mem_ctl_info *mci) |
| { |
| edac_dbg(1, "Unregistering device %s\n", dev_name(&mci->dev)); |
| device_unregister(&mci->dev); |
| bus_unregister(mci->bus); |
| kfree(mci->bus->name); |
| } |
| |
| static void mc_attr_release(struct device *dev) |
| { |
| /* |
| * There's no container structure here, as this is just the mci |
| * parent device, used to create the /sys/devices/mc sysfs node. |
| * So, there are no attributes on it. |
| */ |
| edac_dbg(1, "Releasing device %s\n", dev_name(dev)); |
| kfree(dev); |
| } |
| |
| static struct device_type mc_attr_type = { |
| .release = mc_attr_release, |
| }; |
| /* |
| * Init/exit code for the module. Basically, creates/removes /sys/class/rc |
| */ |
| int __init edac_mc_sysfs_init(void) |
| { |
| struct bus_type *edac_subsys; |
| int err; |
| |
| /* get the /sys/devices/system/edac subsys reference */ |
| edac_subsys = edac_get_sysfs_subsys(); |
| if (edac_subsys == NULL) { |
| edac_dbg(1, "no edac_subsys\n"); |
| err = -EINVAL; |
| goto out; |
| } |
| |
| mci_pdev = kzalloc(sizeof(*mci_pdev), GFP_KERNEL); |
| if (!mci_pdev) { |
| err = -ENOMEM; |
| goto out_put_sysfs; |
| } |
| |
| mci_pdev->bus = edac_subsys; |
| mci_pdev->type = &mc_attr_type; |
| device_initialize(mci_pdev); |
| dev_set_name(mci_pdev, "mc"); |
| |
| err = device_add(mci_pdev); |
| if (err < 0) |
| goto out_dev_free; |
| |
| edac_dbg(0, "device %s created\n", dev_name(mci_pdev)); |
| |
| return 0; |
| |
| out_dev_free: |
| kfree(mci_pdev); |
| out_put_sysfs: |
| edac_put_sysfs_subsys(); |
| out: |
| return err; |
| } |
| |
| void __exit edac_mc_sysfs_exit(void) |
| { |
| device_unregister(mci_pdev); |
| edac_put_sysfs_subsys(); |
| } |