17c9281d7SDouglas Thompson /* 27c9281d7SDouglas Thompson * edac_mc kernel module 342a8e397SDouglas Thompson * (C) 2005-2007 Linux Networx (http://lnxi.com) 442a8e397SDouglas Thompson * 57c9281d7SDouglas Thompson * This file may be distributed under the terms of the 67c9281d7SDouglas Thompson * GNU General Public License. 77c9281d7SDouglas Thompson * 842a8e397SDouglas Thompson * Written Doug Thompson <norsk5@xmission.com> www.softwarebitmaker.com 97c9281d7SDouglas Thompson * 1037e59f87SMauro Carvalho Chehab * (c) 2012-2013 - Mauro Carvalho Chehab 117a623c03SMauro Carvalho Chehab * The entire API were re-written, and ported to use struct device 127a623c03SMauro Carvalho Chehab * 137c9281d7SDouglas Thompson */ 147c9281d7SDouglas Thompson 157c9281d7SDouglas Thompson #include <linux/ctype.h> 165a0e3ad6STejun Heo #include <linux/slab.h> 1730e1f7a8SBorislav Petkov #include <linux/edac.h> 188096cfafSDoug Thompson #include <linux/bug.h> 197a623c03SMauro Carvalho Chehab #include <linux/pm_runtime.h> 20452a6bf9SMauro Carvalho Chehab #include <linux/uaccess.h> 217c9281d7SDouglas Thompson 2220bcb7a8SDouglas Thompson #include "edac_core.h" 237c9281d7SDouglas Thompson #include "edac_module.h" 247c9281d7SDouglas Thompson 257c9281d7SDouglas Thompson /* MC EDAC Controls, setable by module parameter, and sysfs */ 264de78c68SDave Jiang static int edac_mc_log_ue = 1; 274de78c68SDave Jiang static int edac_mc_log_ce = 1; 28f044091cSDouglas Thompson static int edac_mc_panic_on_ue; 294de78c68SDave Jiang static int edac_mc_poll_msec = 1000; 307c9281d7SDouglas Thompson 317c9281d7SDouglas Thompson /* Getter functions for above */ 324de78c68SDave Jiang int edac_mc_get_log_ue(void) 337c9281d7SDouglas Thompson { 344de78c68SDave Jiang return edac_mc_log_ue; 357c9281d7SDouglas Thompson } 367c9281d7SDouglas Thompson 374de78c68SDave Jiang int edac_mc_get_log_ce(void) 387c9281d7SDouglas Thompson { 394de78c68SDave Jiang return edac_mc_log_ce; 407c9281d7SDouglas Thompson } 417c9281d7SDouglas Thompson 424de78c68SDave Jiang int edac_mc_get_panic_on_ue(void) 437c9281d7SDouglas Thompson { 444de78c68SDave Jiang return edac_mc_panic_on_ue; 457c9281d7SDouglas Thompson } 467c9281d7SDouglas Thompson 4781d87cb1SDave Jiang /* this is temporary */ 4881d87cb1SDave Jiang int edac_mc_get_poll_msec(void) 4981d87cb1SDave Jiang { 504de78c68SDave Jiang return edac_mc_poll_msec; 517c9281d7SDouglas Thompson } 527c9281d7SDouglas Thompson 53096846e2SArthur Jones static int edac_set_poll_msec(const char *val, struct kernel_param *kp) 54096846e2SArthur Jones { 559da21b15SBorislav Petkov unsigned long l; 56096846e2SArthur Jones int ret; 57096846e2SArthur Jones 58096846e2SArthur Jones if (!val) 59096846e2SArthur Jones return -EINVAL; 60096846e2SArthur Jones 619da21b15SBorislav Petkov ret = kstrtoul(val, 0, &l); 62c542b53dSJingoo Han if (ret) 63c542b53dSJingoo Han return ret; 649da21b15SBorislav Petkov 659da21b15SBorislav Petkov if (l < 1000) 66096846e2SArthur Jones return -EINVAL; 679da21b15SBorislav Petkov 689da21b15SBorislav Petkov *((unsigned long *)kp->arg) = l; 69096846e2SArthur Jones 70096846e2SArthur Jones /* notify edac_mc engine to reset the poll period */ 71096846e2SArthur Jones edac_mc_reset_delay_period(l); 72096846e2SArthur Jones 73096846e2SArthur Jones return 0; 74096846e2SArthur Jones } 75096846e2SArthur Jones 767c9281d7SDouglas Thompson /* Parameter declarations for above */ 774de78c68SDave Jiang module_param(edac_mc_panic_on_ue, int, 0644); 784de78c68SDave Jiang MODULE_PARM_DESC(edac_mc_panic_on_ue, "Panic on uncorrected error: 0=off 1=on"); 794de78c68SDave Jiang module_param(edac_mc_log_ue, int, 0644); 804de78c68SDave Jiang MODULE_PARM_DESC(edac_mc_log_ue, 814de78c68SDave Jiang "Log uncorrectable error to console: 0=off 1=on"); 824de78c68SDave Jiang module_param(edac_mc_log_ce, int, 0644); 834de78c68SDave Jiang MODULE_PARM_DESC(edac_mc_log_ce, 844de78c68SDave Jiang "Log correctable error to console: 0=off 1=on"); 85096846e2SArthur Jones module_param_call(edac_mc_poll_msec, edac_set_poll_msec, param_get_int, 86096846e2SArthur Jones &edac_mc_poll_msec, 0644); 874de78c68SDave Jiang MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds"); 887c9281d7SDouglas Thompson 89de3910ebSMauro Carvalho Chehab static struct device *mci_pdev; 907a623c03SMauro Carvalho Chehab 917c9281d7SDouglas Thompson /* 927c9281d7SDouglas Thompson * various constants for Memory Controllers 937c9281d7SDouglas Thompson */ 948b7719e0SBorislav Petkov static const char * const mem_types[] = { 957c9281d7SDouglas Thompson [MEM_EMPTY] = "Empty", 967c9281d7SDouglas Thompson [MEM_RESERVED] = "Reserved", 977c9281d7SDouglas Thompson [MEM_UNKNOWN] = "Unknown", 987c9281d7SDouglas Thompson [MEM_FPM] = "FPM", 997c9281d7SDouglas Thompson [MEM_EDO] = "EDO", 1007c9281d7SDouglas Thompson [MEM_BEDO] = "BEDO", 1017c9281d7SDouglas Thompson [MEM_SDR] = "Unbuffered-SDR", 1027c9281d7SDouglas Thompson [MEM_RDR] = "Registered-SDR", 1037c9281d7SDouglas Thompson [MEM_DDR] = "Unbuffered-DDR", 1047c9281d7SDouglas Thompson [MEM_RDDR] = "Registered-DDR", 1051a9b85e6SDave Jiang [MEM_RMBS] = "RMBS", 1061a9b85e6SDave Jiang [MEM_DDR2] = "Unbuffered-DDR2", 1071a9b85e6SDave Jiang [MEM_FB_DDR2] = "FullyBuffered-DDR2", 1081d5f726cSBenjamin Herrenschmidt [MEM_RDDR2] = "Registered-DDR2", 109b1cfebc9SYang Shi [MEM_XDR] = "XDR", 110b1cfebc9SYang Shi [MEM_DDR3] = "Unbuffered-DDR3", 1117b827835SAristeu Rozanski [MEM_RDDR3] = "Registered-DDR3", 1127b827835SAristeu Rozanski [MEM_DDR4] = "Unbuffered-DDR4", 1137b827835SAristeu Rozanski [MEM_RDDR4] = "Registered-DDR4" 1147c9281d7SDouglas Thompson }; 1157c9281d7SDouglas Thompson 1168b7719e0SBorislav Petkov static const char * const dev_types[] = { 1177c9281d7SDouglas Thompson [DEV_UNKNOWN] = "Unknown", 1187c9281d7SDouglas Thompson [DEV_X1] = "x1", 1197c9281d7SDouglas Thompson [DEV_X2] = "x2", 1207c9281d7SDouglas Thompson [DEV_X4] = "x4", 1217c9281d7SDouglas Thompson [DEV_X8] = "x8", 1227c9281d7SDouglas Thompson [DEV_X16] = "x16", 1237c9281d7SDouglas Thompson [DEV_X32] = "x32", 1247c9281d7SDouglas Thompson [DEV_X64] = "x64" 1257c9281d7SDouglas Thompson }; 1267c9281d7SDouglas Thompson 1278b7719e0SBorislav Petkov static const char * const edac_caps[] = { 1287c9281d7SDouglas Thompson [EDAC_UNKNOWN] = "Unknown", 1297c9281d7SDouglas Thompson [EDAC_NONE] = "None", 1307c9281d7SDouglas Thompson [EDAC_RESERVED] = "Reserved", 1317c9281d7SDouglas Thompson [EDAC_PARITY] = "PARITY", 1327c9281d7SDouglas Thompson [EDAC_EC] = "EC", 1337c9281d7SDouglas Thompson [EDAC_SECDED] = "SECDED", 1347c9281d7SDouglas Thompson [EDAC_S2ECD2ED] = "S2ECD2ED", 1357c9281d7SDouglas Thompson [EDAC_S4ECD4ED] = "S4ECD4ED", 1367c9281d7SDouglas Thompson [EDAC_S8ECD8ED] = "S8ECD8ED", 1377c9281d7SDouglas Thompson [EDAC_S16ECD16ED] = "S16ECD16ED" 1387c9281d7SDouglas Thompson }; 1397c9281d7SDouglas Thompson 14019974710SMauro Carvalho Chehab #ifdef CONFIG_EDAC_LEGACY_SYSFS 1417a623c03SMauro Carvalho Chehab /* 1427a623c03SMauro Carvalho Chehab * EDAC sysfs CSROW data structures and methods 1437c9281d7SDouglas Thompson */ 1447c9281d7SDouglas Thompson 1457a623c03SMauro Carvalho Chehab #define to_csrow(k) container_of(k, struct csrow_info, dev) 1467a623c03SMauro Carvalho Chehab 1477a623c03SMauro Carvalho Chehab /* 1487a623c03SMauro Carvalho Chehab * We need it to avoid namespace conflicts between the legacy API 1497a623c03SMauro Carvalho Chehab * and the per-dimm/per-rank one 1507a623c03SMauro Carvalho Chehab */ 1517a623c03SMauro Carvalho Chehab #define DEVICE_ATTR_LEGACY(_name, _mode, _show, _store) \ 152fbe2d361SStephen Hemminger static struct device_attribute dev_attr_legacy_##_name = __ATTR(_name, _mode, _show, _store) 1537a623c03SMauro Carvalho Chehab 1547a623c03SMauro Carvalho Chehab struct dev_ch_attribute { 1557a623c03SMauro Carvalho Chehab struct device_attribute attr; 1567a623c03SMauro Carvalho Chehab int channel; 1577a623c03SMauro Carvalho Chehab }; 1587a623c03SMauro Carvalho Chehab 1597a623c03SMauro Carvalho Chehab #define DEVICE_CHANNEL(_name, _mode, _show, _store, _var) \ 160f11135d8SBorislav Petkov static struct dev_ch_attribute dev_attr_legacy_##_name = \ 1617a623c03SMauro Carvalho Chehab { __ATTR(_name, _mode, _show, _store), (_var) } 1627a623c03SMauro Carvalho Chehab 1637a623c03SMauro Carvalho Chehab #define to_channel(k) (container_of(k, struct dev_ch_attribute, attr)->channel) 1647a623c03SMauro Carvalho Chehab 1657c9281d7SDouglas Thompson /* Set of more default csrow<id> attribute show/store functions */ 1667a623c03SMauro Carvalho Chehab static ssize_t csrow_ue_count_show(struct device *dev, 1677a623c03SMauro Carvalho Chehab struct device_attribute *mattr, char *data) 1687c9281d7SDouglas Thompson { 1697a623c03SMauro Carvalho Chehab struct csrow_info *csrow = to_csrow(dev); 1707a623c03SMauro Carvalho Chehab 1717c9281d7SDouglas Thompson return sprintf(data, "%u\n", csrow->ue_count); 1727c9281d7SDouglas Thompson } 1737c9281d7SDouglas Thompson 1747a623c03SMauro Carvalho Chehab static ssize_t csrow_ce_count_show(struct device *dev, 1757a623c03SMauro Carvalho Chehab struct device_attribute *mattr, char *data) 1767c9281d7SDouglas Thompson { 1777a623c03SMauro Carvalho Chehab struct csrow_info *csrow = to_csrow(dev); 1787a623c03SMauro Carvalho Chehab 1797c9281d7SDouglas Thompson return sprintf(data, "%u\n", csrow->ce_count); 1807c9281d7SDouglas Thompson } 1817c9281d7SDouglas Thompson 1827a623c03SMauro Carvalho Chehab static ssize_t csrow_size_show(struct device *dev, 1837a623c03SMauro Carvalho Chehab struct device_attribute *mattr, char *data) 1847c9281d7SDouglas Thompson { 1857a623c03SMauro Carvalho Chehab struct csrow_info *csrow = to_csrow(dev); 186a895bf8bSMauro Carvalho Chehab int i; 187a895bf8bSMauro Carvalho Chehab u32 nr_pages = 0; 188a895bf8bSMauro Carvalho Chehab 189a895bf8bSMauro Carvalho Chehab for (i = 0; i < csrow->nr_channels; i++) 190de3910ebSMauro Carvalho Chehab nr_pages += csrow->channels[i]->dimm->nr_pages; 191a895bf8bSMauro Carvalho Chehab return sprintf(data, "%u\n", PAGES_TO_MiB(nr_pages)); 1927c9281d7SDouglas Thompson } 1937c9281d7SDouglas Thompson 1947a623c03SMauro Carvalho Chehab static ssize_t csrow_mem_type_show(struct device *dev, 1957a623c03SMauro Carvalho Chehab struct device_attribute *mattr, char *data) 1967c9281d7SDouglas Thompson { 1977a623c03SMauro Carvalho Chehab struct csrow_info *csrow = to_csrow(dev); 1987a623c03SMauro Carvalho Chehab 199de3910ebSMauro Carvalho Chehab return sprintf(data, "%s\n", mem_types[csrow->channels[0]->dimm->mtype]); 2007c9281d7SDouglas Thompson } 2017c9281d7SDouglas Thompson 2027a623c03SMauro Carvalho Chehab static ssize_t csrow_dev_type_show(struct device *dev, 2037a623c03SMauro Carvalho Chehab struct device_attribute *mattr, char *data) 2047c9281d7SDouglas Thompson { 2057a623c03SMauro Carvalho Chehab struct csrow_info *csrow = to_csrow(dev); 2067a623c03SMauro Carvalho Chehab 207de3910ebSMauro Carvalho Chehab return sprintf(data, "%s\n", dev_types[csrow->channels[0]->dimm->dtype]); 2087c9281d7SDouglas Thompson } 2097c9281d7SDouglas Thompson 2107a623c03SMauro Carvalho Chehab static ssize_t csrow_edac_mode_show(struct device *dev, 2117a623c03SMauro Carvalho Chehab struct device_attribute *mattr, 2127a623c03SMauro Carvalho Chehab char *data) 2137c9281d7SDouglas Thompson { 2147a623c03SMauro Carvalho Chehab struct csrow_info *csrow = to_csrow(dev); 2157a623c03SMauro Carvalho Chehab 216de3910ebSMauro Carvalho Chehab return sprintf(data, "%s\n", edac_caps[csrow->channels[0]->dimm->edac_mode]); 2177c9281d7SDouglas Thompson } 2187c9281d7SDouglas Thompson 2197c9281d7SDouglas Thompson /* show/store functions for DIMM Label attributes */ 2207a623c03SMauro Carvalho Chehab static ssize_t channel_dimm_label_show(struct device *dev, 2217a623c03SMauro Carvalho Chehab struct device_attribute *mattr, 2227a623c03SMauro Carvalho Chehab char *data) 2237c9281d7SDouglas Thompson { 2247a623c03SMauro Carvalho Chehab struct csrow_info *csrow = to_csrow(dev); 2257a623c03SMauro Carvalho Chehab unsigned chan = to_channel(mattr); 226de3910ebSMauro Carvalho Chehab struct rank_info *rank = csrow->channels[chan]; 2277a623c03SMauro Carvalho Chehab 228124682c7SArthur Jones /* if field has not been initialized, there is nothing to send */ 2297a623c03SMauro Carvalho Chehab if (!rank->dimm->label[0]) 230124682c7SArthur Jones return 0; 231124682c7SArthur Jones 2321ea62c59SToshi Kani return snprintf(data, sizeof(rank->dimm->label) + 1, "%s\n", 2337a623c03SMauro Carvalho Chehab rank->dimm->label); 2347c9281d7SDouglas Thompson } 2357c9281d7SDouglas Thompson 2367a623c03SMauro Carvalho Chehab static ssize_t channel_dimm_label_store(struct device *dev, 2377a623c03SMauro Carvalho Chehab struct device_attribute *mattr, 2387a623c03SMauro Carvalho Chehab const char *data, size_t count) 2397c9281d7SDouglas Thompson { 2407a623c03SMauro Carvalho Chehab struct csrow_info *csrow = to_csrow(dev); 2417a623c03SMauro Carvalho Chehab unsigned chan = to_channel(mattr); 242de3910ebSMauro Carvalho Chehab struct rank_info *rank = csrow->channels[chan]; 243438470b8SToshi Kani size_t copy_count = count; 2447a623c03SMauro Carvalho Chehab 245438470b8SToshi Kani if (count == 0) 246438470b8SToshi Kani return -EINVAL; 2477c9281d7SDouglas Thompson 248438470b8SToshi Kani if (data[count - 1] == '\0' || data[count - 1] == '\n') 249438470b8SToshi Kani copy_count -= 1; 2507c9281d7SDouglas Thompson 251d0c9c930SToshi Kani if (copy_count == 0 || copy_count >= sizeof(rank->dimm->label)) 252438470b8SToshi Kani return -EINVAL; 253438470b8SToshi Kani 254438470b8SToshi Kani strncpy(rank->dimm->label, data, copy_count); 255438470b8SToshi Kani rank->dimm->label[copy_count] = '\0'; 256438470b8SToshi Kani 257438470b8SToshi Kani return count; 2587c9281d7SDouglas Thompson } 2597c9281d7SDouglas Thompson 2607c9281d7SDouglas Thompson /* show function for dynamic chX_ce_count attribute */ 2617a623c03SMauro Carvalho Chehab static ssize_t channel_ce_count_show(struct device *dev, 2627a623c03SMauro Carvalho Chehab struct device_attribute *mattr, char *data) 2637c9281d7SDouglas Thompson { 2647a623c03SMauro Carvalho Chehab struct csrow_info *csrow = to_csrow(dev); 2657a623c03SMauro Carvalho Chehab unsigned chan = to_channel(mattr); 266de3910ebSMauro Carvalho Chehab struct rank_info *rank = csrow->channels[chan]; 2677a623c03SMauro Carvalho Chehab 2687a623c03SMauro Carvalho Chehab return sprintf(data, "%u\n", rank->ce_count); 2697c9281d7SDouglas Thompson } 2707c9281d7SDouglas Thompson 2717a623c03SMauro Carvalho Chehab /* cwrow<id>/attribute files */ 2727a623c03SMauro Carvalho Chehab DEVICE_ATTR_LEGACY(size_mb, S_IRUGO, csrow_size_show, NULL); 2737a623c03SMauro Carvalho Chehab DEVICE_ATTR_LEGACY(dev_type, S_IRUGO, csrow_dev_type_show, NULL); 2747a623c03SMauro Carvalho Chehab DEVICE_ATTR_LEGACY(mem_type, S_IRUGO, csrow_mem_type_show, NULL); 2757a623c03SMauro Carvalho Chehab DEVICE_ATTR_LEGACY(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL); 2767a623c03SMauro Carvalho Chehab DEVICE_ATTR_LEGACY(ue_count, S_IRUGO, csrow_ue_count_show, NULL); 2777a623c03SMauro Carvalho Chehab DEVICE_ATTR_LEGACY(ce_count, S_IRUGO, csrow_ce_count_show, NULL); 2787c9281d7SDouglas Thompson 2797c9281d7SDouglas Thompson /* default attributes of the CSROW<id> object */ 2807a623c03SMauro Carvalho Chehab static struct attribute *csrow_attrs[] = { 2817a623c03SMauro Carvalho Chehab &dev_attr_legacy_dev_type.attr, 2827a623c03SMauro Carvalho Chehab &dev_attr_legacy_mem_type.attr, 2837a623c03SMauro Carvalho Chehab &dev_attr_legacy_edac_mode.attr, 2847a623c03SMauro Carvalho Chehab &dev_attr_legacy_size_mb.attr, 2857a623c03SMauro Carvalho Chehab &dev_attr_legacy_ue_count.attr, 2867a623c03SMauro Carvalho Chehab &dev_attr_legacy_ce_count.attr, 2877c9281d7SDouglas Thompson NULL, 2887c9281d7SDouglas Thompson }; 2897c9281d7SDouglas Thompson 2907a623c03SMauro Carvalho Chehab static struct attribute_group csrow_attr_grp = { 2917a623c03SMauro Carvalho Chehab .attrs = csrow_attrs, 2927c9281d7SDouglas Thompson }; 2937c9281d7SDouglas Thompson 2947a623c03SMauro Carvalho Chehab static const struct attribute_group *csrow_attr_groups[] = { 2957a623c03SMauro Carvalho Chehab &csrow_attr_grp, 2967a623c03SMauro Carvalho Chehab NULL 2977c9281d7SDouglas Thompson }; 2987c9281d7SDouglas Thompson 299de3910ebSMauro Carvalho Chehab static void csrow_attr_release(struct device *dev) 3007a623c03SMauro Carvalho Chehab { 301de3910ebSMauro Carvalho Chehab struct csrow_info *csrow = container_of(dev, struct csrow_info, dev); 302de3910ebSMauro Carvalho Chehab 303956b9ba1SJoe Perches edac_dbg(1, "Releasing csrow device %s\n", dev_name(dev)); 304de3910ebSMauro Carvalho Chehab kfree(csrow); 3057a623c03SMauro Carvalho Chehab } 3067a623c03SMauro Carvalho Chehab 3077a623c03SMauro Carvalho Chehab static struct device_type csrow_attr_type = { 3087a623c03SMauro Carvalho Chehab .groups = csrow_attr_groups, 3097a623c03SMauro Carvalho Chehab .release = csrow_attr_release, 3107a623c03SMauro Carvalho Chehab }; 3117a623c03SMauro Carvalho Chehab 3127a623c03SMauro Carvalho Chehab /* 3137a623c03SMauro Carvalho Chehab * possible dynamic channel DIMM Label attribute files 3147a623c03SMauro Carvalho Chehab * 3157a623c03SMauro Carvalho Chehab */ 3167a623c03SMauro Carvalho Chehab 3177a623c03SMauro Carvalho Chehab DEVICE_CHANNEL(ch0_dimm_label, S_IRUGO | S_IWUSR, 3187a623c03SMauro Carvalho Chehab channel_dimm_label_show, channel_dimm_label_store, 0); 3197a623c03SMauro Carvalho Chehab DEVICE_CHANNEL(ch1_dimm_label, S_IRUGO | S_IWUSR, 3207a623c03SMauro Carvalho Chehab channel_dimm_label_show, channel_dimm_label_store, 1); 3217a623c03SMauro Carvalho Chehab DEVICE_CHANNEL(ch2_dimm_label, S_IRUGO | S_IWUSR, 3227a623c03SMauro Carvalho Chehab channel_dimm_label_show, channel_dimm_label_store, 2); 3237a623c03SMauro Carvalho Chehab DEVICE_CHANNEL(ch3_dimm_label, S_IRUGO | S_IWUSR, 3247a623c03SMauro Carvalho Chehab channel_dimm_label_show, channel_dimm_label_store, 3); 3257a623c03SMauro Carvalho Chehab DEVICE_CHANNEL(ch4_dimm_label, S_IRUGO | S_IWUSR, 3267a623c03SMauro Carvalho Chehab channel_dimm_label_show, channel_dimm_label_store, 4); 3277a623c03SMauro Carvalho Chehab DEVICE_CHANNEL(ch5_dimm_label, S_IRUGO | S_IWUSR, 3287a623c03SMauro Carvalho Chehab channel_dimm_label_show, channel_dimm_label_store, 5); 3297c9281d7SDouglas Thompson 3307a623c03SMauro Carvalho Chehab /* Total possible dynamic DIMM Label attribute file table */ 3312c1946b6STakashi Iwai static struct attribute *dynamic_csrow_dimm_attr[] = { 3322c1946b6STakashi Iwai &dev_attr_legacy_ch0_dimm_label.attr.attr, 3332c1946b6STakashi Iwai &dev_attr_legacy_ch1_dimm_label.attr.attr, 3342c1946b6STakashi Iwai &dev_attr_legacy_ch2_dimm_label.attr.attr, 3352c1946b6STakashi Iwai &dev_attr_legacy_ch3_dimm_label.attr.attr, 3362c1946b6STakashi Iwai &dev_attr_legacy_ch4_dimm_label.attr.attr, 3372c1946b6STakashi Iwai &dev_attr_legacy_ch5_dimm_label.attr.attr, 3382c1946b6STakashi Iwai NULL 3397a623c03SMauro Carvalho Chehab }; 3407c9281d7SDouglas Thompson 3417a623c03SMauro Carvalho Chehab /* possible dynamic channel ce_count attribute files */ 342c8c64d16SSrivatsa S. Bhat DEVICE_CHANNEL(ch0_ce_count, S_IRUGO, 3437a623c03SMauro Carvalho Chehab channel_ce_count_show, NULL, 0); 344c8c64d16SSrivatsa S. Bhat DEVICE_CHANNEL(ch1_ce_count, S_IRUGO, 3457a623c03SMauro Carvalho Chehab channel_ce_count_show, NULL, 1); 346c8c64d16SSrivatsa S. Bhat DEVICE_CHANNEL(ch2_ce_count, S_IRUGO, 3477a623c03SMauro Carvalho Chehab channel_ce_count_show, NULL, 2); 348c8c64d16SSrivatsa S. Bhat DEVICE_CHANNEL(ch3_ce_count, S_IRUGO, 3497a623c03SMauro Carvalho Chehab channel_ce_count_show, NULL, 3); 350c8c64d16SSrivatsa S. Bhat DEVICE_CHANNEL(ch4_ce_count, S_IRUGO, 3517a623c03SMauro Carvalho Chehab channel_ce_count_show, NULL, 4); 352c8c64d16SSrivatsa S. Bhat DEVICE_CHANNEL(ch5_ce_count, S_IRUGO, 3537a623c03SMauro Carvalho Chehab channel_ce_count_show, NULL, 5); 3547c9281d7SDouglas Thompson 3557a623c03SMauro Carvalho Chehab /* Total possible dynamic ce_count attribute file table */ 3562c1946b6STakashi Iwai static struct attribute *dynamic_csrow_ce_count_attr[] = { 3572c1946b6STakashi Iwai &dev_attr_legacy_ch0_ce_count.attr.attr, 3582c1946b6STakashi Iwai &dev_attr_legacy_ch1_ce_count.attr.attr, 3592c1946b6STakashi Iwai &dev_attr_legacy_ch2_ce_count.attr.attr, 3602c1946b6STakashi Iwai &dev_attr_legacy_ch3_ce_count.attr.attr, 3612c1946b6STakashi Iwai &dev_attr_legacy_ch4_ce_count.attr.attr, 3622c1946b6STakashi Iwai &dev_attr_legacy_ch5_ce_count.attr.attr, 3632c1946b6STakashi Iwai NULL 3642c1946b6STakashi Iwai }; 3652c1946b6STakashi Iwai 3662c1946b6STakashi Iwai static umode_t csrow_dev_is_visible(struct kobject *kobj, 3672c1946b6STakashi Iwai struct attribute *attr, int idx) 3682c1946b6STakashi Iwai { 3692c1946b6STakashi Iwai struct device *dev = kobj_to_dev(kobj); 3702c1946b6STakashi Iwai struct csrow_info *csrow = container_of(dev, struct csrow_info, dev); 3712c1946b6STakashi Iwai 3722c1946b6STakashi Iwai if (idx >= csrow->nr_channels) 3732c1946b6STakashi Iwai return 0; 3742c1946b6STakashi Iwai /* Only expose populated DIMMs */ 3752c1946b6STakashi Iwai if (!csrow->channels[idx]->dimm->nr_pages) 3762c1946b6STakashi Iwai return 0; 3772c1946b6STakashi Iwai return attr->mode; 3782c1946b6STakashi Iwai } 3792c1946b6STakashi Iwai 3802c1946b6STakashi Iwai 3812c1946b6STakashi Iwai static const struct attribute_group csrow_dev_dimm_group = { 3822c1946b6STakashi Iwai .attrs = dynamic_csrow_dimm_attr, 3832c1946b6STakashi Iwai .is_visible = csrow_dev_is_visible, 3842c1946b6STakashi Iwai }; 3852c1946b6STakashi Iwai 3862c1946b6STakashi Iwai static const struct attribute_group csrow_dev_ce_count_group = { 3872c1946b6STakashi Iwai .attrs = dynamic_csrow_ce_count_attr, 3882c1946b6STakashi Iwai .is_visible = csrow_dev_is_visible, 3892c1946b6STakashi Iwai }; 3902c1946b6STakashi Iwai 3912c1946b6STakashi Iwai static const struct attribute_group *csrow_dev_groups[] = { 3922c1946b6STakashi Iwai &csrow_dev_dimm_group, 3932c1946b6STakashi Iwai &csrow_dev_ce_count_group, 3942c1946b6STakashi Iwai NULL 3957c9281d7SDouglas Thompson }; 3967c9281d7SDouglas Thompson 397e39f4ea9SMauro Carvalho Chehab static inline int nr_pages_per_csrow(struct csrow_info *csrow) 398e39f4ea9SMauro Carvalho Chehab { 399e39f4ea9SMauro Carvalho Chehab int chan, nr_pages = 0; 400e39f4ea9SMauro Carvalho Chehab 401e39f4ea9SMauro Carvalho Chehab for (chan = 0; chan < csrow->nr_channels; chan++) 402de3910ebSMauro Carvalho Chehab nr_pages += csrow->channels[chan]->dimm->nr_pages; 403e39f4ea9SMauro Carvalho Chehab 404e39f4ea9SMauro Carvalho Chehab return nr_pages; 405e39f4ea9SMauro Carvalho Chehab } 406e39f4ea9SMauro Carvalho Chehab 4077c9281d7SDouglas Thompson /* Create a CSROW object under specifed edac_mc_device */ 4088096cfafSDoug Thompson static int edac_create_csrow_object(struct mem_ctl_info *mci, 409079708b9SDouglas Thompson struct csrow_info *csrow, int index) 4107c9281d7SDouglas Thompson { 4117a623c03SMauro Carvalho Chehab csrow->dev.type = &csrow_attr_type; 41288d84ac9SBorislav Petkov csrow->dev.bus = mci->bus; 4132c1946b6STakashi Iwai csrow->dev.groups = csrow_dev_groups; 4147a623c03SMauro Carvalho Chehab device_initialize(&csrow->dev); 4157a623c03SMauro Carvalho Chehab csrow->dev.parent = &mci->dev; 416921a6899SBorislav Petkov csrow->mci = mci; 4177a623c03SMauro Carvalho Chehab dev_set_name(&csrow->dev, "csrow%d", index); 4187a623c03SMauro Carvalho Chehab dev_set_drvdata(&csrow->dev, csrow); 4197c9281d7SDouglas Thompson 420956b9ba1SJoe Perches edac_dbg(0, "creating (virtual) csrow node %s\n", 421956b9ba1SJoe Perches dev_name(&csrow->dev)); 4228096cfafSDoug Thompson 4232c1946b6STakashi Iwai return device_add(&csrow->dev); 4247c9281d7SDouglas Thompson } 4257c9281d7SDouglas Thompson 4267a623c03SMauro Carvalho Chehab /* Create a CSROW object under specifed edac_mc_device */ 4277a623c03SMauro Carvalho Chehab static int edac_create_csrow_objects(struct mem_ctl_info *mci) 4287a623c03SMauro Carvalho Chehab { 4292c1946b6STakashi Iwai int err, i; 4307a623c03SMauro Carvalho Chehab struct csrow_info *csrow; 4317c9281d7SDouglas Thompson 4327a623c03SMauro Carvalho Chehab for (i = 0; i < mci->nr_csrows; i++) { 433de3910ebSMauro Carvalho Chehab csrow = mci->csrows[i]; 434e39f4ea9SMauro Carvalho Chehab if (!nr_pages_per_csrow(csrow)) 435e39f4ea9SMauro Carvalho Chehab continue; 436de3910ebSMauro Carvalho Chehab err = edac_create_csrow_object(mci, mci->csrows[i], i); 4373d958823SMauro Carvalho Chehab if (err < 0) { 4383d958823SMauro Carvalho Chehab edac_dbg(1, 4393d958823SMauro Carvalho Chehab "failure: create csrow objects for csrow %d\n", 4403d958823SMauro Carvalho Chehab i); 4417a623c03SMauro Carvalho Chehab goto error; 4427a623c03SMauro Carvalho Chehab } 4433d958823SMauro Carvalho Chehab } 4447a623c03SMauro Carvalho Chehab return 0; 4457a623c03SMauro Carvalho Chehab 4467a623c03SMauro Carvalho Chehab error: 4477a623c03SMauro Carvalho Chehab for (--i; i >= 0; i--) { 448de3910ebSMauro Carvalho Chehab csrow = mci->csrows[i]; 449e39f4ea9SMauro Carvalho Chehab if (!nr_pages_per_csrow(csrow)) 450e39f4ea9SMauro Carvalho Chehab continue; 451de3910ebSMauro Carvalho Chehab put_device(&mci->csrows[i]->dev); 4527a623c03SMauro Carvalho Chehab } 4537a623c03SMauro Carvalho Chehab 4547a623c03SMauro Carvalho Chehab return err; 4557a623c03SMauro Carvalho Chehab } 4567a623c03SMauro Carvalho Chehab 4577a623c03SMauro Carvalho Chehab static void edac_delete_csrow_objects(struct mem_ctl_info *mci) 4587a623c03SMauro Carvalho Chehab { 4592c1946b6STakashi Iwai int i; 4607a623c03SMauro Carvalho Chehab struct csrow_info *csrow; 4617a623c03SMauro Carvalho Chehab 4627a623c03SMauro Carvalho Chehab for (i = mci->nr_csrows - 1; i >= 0; i--) { 463de3910ebSMauro Carvalho Chehab csrow = mci->csrows[i]; 464e39f4ea9SMauro Carvalho Chehab if (!nr_pages_per_csrow(csrow)) 465e39f4ea9SMauro Carvalho Chehab continue; 46644d22e24SLans Zhang device_unregister(&mci->csrows[i]->dev); 4677a623c03SMauro Carvalho Chehab } 4687a623c03SMauro Carvalho Chehab } 46919974710SMauro Carvalho Chehab #endif 47019974710SMauro Carvalho Chehab 47119974710SMauro Carvalho Chehab /* 47219974710SMauro Carvalho Chehab * Per-dimm (or per-rank) devices 47319974710SMauro Carvalho Chehab */ 47419974710SMauro Carvalho Chehab 47519974710SMauro Carvalho Chehab #define to_dimm(k) container_of(k, struct dimm_info, dev) 47619974710SMauro Carvalho Chehab 47719974710SMauro Carvalho Chehab /* show/store functions for DIMM Label attributes */ 47819974710SMauro Carvalho Chehab static ssize_t dimmdev_location_show(struct device *dev, 47919974710SMauro Carvalho Chehab struct device_attribute *mattr, char *data) 48019974710SMauro Carvalho Chehab { 48119974710SMauro Carvalho Chehab struct dimm_info *dimm = to_dimm(dev); 48219974710SMauro Carvalho Chehab 4836e84d359SMauro Carvalho Chehab return edac_dimm_info_location(dimm, data, PAGE_SIZE); 48419974710SMauro Carvalho Chehab } 48519974710SMauro Carvalho Chehab 48619974710SMauro Carvalho Chehab static ssize_t dimmdev_label_show(struct device *dev, 48719974710SMauro Carvalho Chehab struct device_attribute *mattr, char *data) 48819974710SMauro Carvalho Chehab { 48919974710SMauro Carvalho Chehab struct dimm_info *dimm = to_dimm(dev); 49019974710SMauro Carvalho Chehab 49119974710SMauro Carvalho Chehab /* if field has not been initialized, there is nothing to send */ 49219974710SMauro Carvalho Chehab if (!dimm->label[0]) 49319974710SMauro Carvalho Chehab return 0; 49419974710SMauro Carvalho Chehab 4951ea62c59SToshi Kani return snprintf(data, sizeof(dimm->label) + 1, "%s\n", dimm->label); 49619974710SMauro Carvalho Chehab } 49719974710SMauro Carvalho Chehab 49819974710SMauro Carvalho Chehab static ssize_t dimmdev_label_store(struct device *dev, 49919974710SMauro Carvalho Chehab struct device_attribute *mattr, 50019974710SMauro Carvalho Chehab const char *data, 50119974710SMauro Carvalho Chehab size_t count) 50219974710SMauro Carvalho Chehab { 50319974710SMauro Carvalho Chehab struct dimm_info *dimm = to_dimm(dev); 504438470b8SToshi Kani size_t copy_count = count; 50519974710SMauro Carvalho Chehab 506438470b8SToshi Kani if (count == 0) 507438470b8SToshi Kani return -EINVAL; 50819974710SMauro Carvalho Chehab 509438470b8SToshi Kani if (data[count - 1] == '\0' || data[count - 1] == '\n') 510438470b8SToshi Kani copy_count -= 1; 51119974710SMauro Carvalho Chehab 512d0c9c930SToshi Kani if (copy_count == 0 || copy_count >= sizeof(dimm->label)) 513438470b8SToshi Kani return -EINVAL; 514438470b8SToshi Kani 515438470b8SToshi Kani strncpy(dimm->label, data, copy_count); 516438470b8SToshi Kani dimm->label[copy_count] = '\0'; 517438470b8SToshi Kani 518438470b8SToshi Kani return count; 51919974710SMauro Carvalho Chehab } 52019974710SMauro Carvalho Chehab 52119974710SMauro Carvalho Chehab static ssize_t dimmdev_size_show(struct device *dev, 52219974710SMauro Carvalho Chehab struct device_attribute *mattr, char *data) 52319974710SMauro Carvalho Chehab { 52419974710SMauro Carvalho Chehab struct dimm_info *dimm = to_dimm(dev); 52519974710SMauro Carvalho Chehab 52619974710SMauro Carvalho Chehab return sprintf(data, "%u\n", PAGES_TO_MiB(dimm->nr_pages)); 52719974710SMauro Carvalho Chehab } 52819974710SMauro Carvalho Chehab 52919974710SMauro Carvalho Chehab static ssize_t dimmdev_mem_type_show(struct device *dev, 53019974710SMauro Carvalho Chehab struct device_attribute *mattr, char *data) 53119974710SMauro Carvalho Chehab { 53219974710SMauro Carvalho Chehab struct dimm_info *dimm = to_dimm(dev); 53319974710SMauro Carvalho Chehab 53419974710SMauro Carvalho Chehab return sprintf(data, "%s\n", mem_types[dimm->mtype]); 53519974710SMauro Carvalho Chehab } 53619974710SMauro Carvalho Chehab 53719974710SMauro Carvalho Chehab static ssize_t dimmdev_dev_type_show(struct device *dev, 53819974710SMauro Carvalho Chehab struct device_attribute *mattr, char *data) 53919974710SMauro Carvalho Chehab { 54019974710SMauro Carvalho Chehab struct dimm_info *dimm = to_dimm(dev); 54119974710SMauro Carvalho Chehab 54219974710SMauro Carvalho Chehab return sprintf(data, "%s\n", dev_types[dimm->dtype]); 54319974710SMauro Carvalho Chehab } 54419974710SMauro Carvalho Chehab 54519974710SMauro Carvalho Chehab static ssize_t dimmdev_edac_mode_show(struct device *dev, 54619974710SMauro Carvalho Chehab struct device_attribute *mattr, 54719974710SMauro Carvalho Chehab char *data) 54819974710SMauro Carvalho Chehab { 54919974710SMauro Carvalho Chehab struct dimm_info *dimm = to_dimm(dev); 55019974710SMauro Carvalho Chehab 55119974710SMauro Carvalho Chehab return sprintf(data, "%s\n", edac_caps[dimm->edac_mode]); 55219974710SMauro Carvalho Chehab } 55319974710SMauro Carvalho Chehab 55419974710SMauro Carvalho Chehab /* dimm/rank attribute files */ 55519974710SMauro Carvalho Chehab static DEVICE_ATTR(dimm_label, S_IRUGO | S_IWUSR, 55619974710SMauro Carvalho Chehab dimmdev_label_show, dimmdev_label_store); 55719974710SMauro Carvalho Chehab static DEVICE_ATTR(dimm_location, S_IRUGO, dimmdev_location_show, NULL); 55819974710SMauro Carvalho Chehab static DEVICE_ATTR(size, S_IRUGO, dimmdev_size_show, NULL); 55919974710SMauro Carvalho Chehab static DEVICE_ATTR(dimm_mem_type, S_IRUGO, dimmdev_mem_type_show, NULL); 56019974710SMauro Carvalho Chehab static DEVICE_ATTR(dimm_dev_type, S_IRUGO, dimmdev_dev_type_show, NULL); 56119974710SMauro Carvalho Chehab static DEVICE_ATTR(dimm_edac_mode, S_IRUGO, dimmdev_edac_mode_show, NULL); 56219974710SMauro Carvalho Chehab 56319974710SMauro Carvalho Chehab /* attributes of the dimm<id>/rank<id> object */ 56419974710SMauro Carvalho Chehab static struct attribute *dimm_attrs[] = { 56519974710SMauro Carvalho Chehab &dev_attr_dimm_label.attr, 56619974710SMauro Carvalho Chehab &dev_attr_dimm_location.attr, 56719974710SMauro Carvalho Chehab &dev_attr_size.attr, 56819974710SMauro Carvalho Chehab &dev_attr_dimm_mem_type.attr, 56919974710SMauro Carvalho Chehab &dev_attr_dimm_dev_type.attr, 57019974710SMauro Carvalho Chehab &dev_attr_dimm_edac_mode.attr, 57119974710SMauro Carvalho Chehab NULL, 57219974710SMauro Carvalho Chehab }; 57319974710SMauro Carvalho Chehab 57419974710SMauro Carvalho Chehab static struct attribute_group dimm_attr_grp = { 57519974710SMauro Carvalho Chehab .attrs = dimm_attrs, 57619974710SMauro Carvalho Chehab }; 57719974710SMauro Carvalho Chehab 57819974710SMauro Carvalho Chehab static const struct attribute_group *dimm_attr_groups[] = { 57919974710SMauro Carvalho Chehab &dimm_attr_grp, 58019974710SMauro Carvalho Chehab NULL 58119974710SMauro Carvalho Chehab }; 58219974710SMauro Carvalho Chehab 583de3910ebSMauro Carvalho Chehab static void dimm_attr_release(struct device *dev) 58419974710SMauro Carvalho Chehab { 585de3910ebSMauro Carvalho Chehab struct dimm_info *dimm = container_of(dev, struct dimm_info, dev); 586de3910ebSMauro Carvalho Chehab 587956b9ba1SJoe Perches edac_dbg(1, "Releasing dimm device %s\n", dev_name(dev)); 588de3910ebSMauro Carvalho Chehab kfree(dimm); 58919974710SMauro Carvalho Chehab } 59019974710SMauro Carvalho Chehab 59119974710SMauro Carvalho Chehab static struct device_type dimm_attr_type = { 59219974710SMauro Carvalho Chehab .groups = dimm_attr_groups, 59319974710SMauro Carvalho Chehab .release = dimm_attr_release, 59419974710SMauro Carvalho Chehab }; 59519974710SMauro Carvalho Chehab 59619974710SMauro Carvalho Chehab /* Create a DIMM object under specifed memory controller device */ 59719974710SMauro Carvalho Chehab static int edac_create_dimm_object(struct mem_ctl_info *mci, 59819974710SMauro Carvalho Chehab struct dimm_info *dimm, 59919974710SMauro Carvalho Chehab int index) 60019974710SMauro Carvalho Chehab { 60119974710SMauro Carvalho Chehab int err; 60219974710SMauro Carvalho Chehab dimm->mci = mci; 60319974710SMauro Carvalho Chehab 60419974710SMauro Carvalho Chehab dimm->dev.type = &dimm_attr_type; 60588d84ac9SBorislav Petkov dimm->dev.bus = mci->bus; 60619974710SMauro Carvalho Chehab device_initialize(&dimm->dev); 60719974710SMauro Carvalho Chehab 60819974710SMauro Carvalho Chehab dimm->dev.parent = &mci->dev; 6099713faecSMauro Carvalho Chehab if (mci->csbased) 61019974710SMauro Carvalho Chehab dev_set_name(&dimm->dev, "rank%d", index); 61119974710SMauro Carvalho Chehab else 61219974710SMauro Carvalho Chehab dev_set_name(&dimm->dev, "dimm%d", index); 61319974710SMauro Carvalho Chehab dev_set_drvdata(&dimm->dev, dimm); 61419974710SMauro Carvalho Chehab pm_runtime_forbid(&mci->dev); 61519974710SMauro Carvalho Chehab 61619974710SMauro Carvalho Chehab err = device_add(&dimm->dev); 61719974710SMauro Carvalho Chehab 618956b9ba1SJoe Perches edac_dbg(0, "creating rank/dimm device %s\n", dev_name(&dimm->dev)); 61919974710SMauro Carvalho Chehab 62019974710SMauro Carvalho Chehab return err; 62119974710SMauro Carvalho Chehab } 6227a623c03SMauro Carvalho Chehab 6237a623c03SMauro Carvalho Chehab /* 6247a623c03SMauro Carvalho Chehab * Memory controller device 6257a623c03SMauro Carvalho Chehab */ 6267a623c03SMauro Carvalho Chehab 6277a623c03SMauro Carvalho Chehab #define to_mci(k) container_of(k, struct mem_ctl_info, dev) 6287a623c03SMauro Carvalho Chehab 6297a623c03SMauro Carvalho Chehab static ssize_t mci_reset_counters_store(struct device *dev, 6307a623c03SMauro Carvalho Chehab struct device_attribute *mattr, 6317c9281d7SDouglas Thompson const char *data, size_t count) 6327c9281d7SDouglas Thompson { 6337a623c03SMauro Carvalho Chehab struct mem_ctl_info *mci = to_mci(dev); 6347a623c03SMauro Carvalho Chehab int cnt, row, chan, i; 6355926ff50SMauro Carvalho Chehab mci->ue_mc = 0; 6365926ff50SMauro Carvalho Chehab mci->ce_mc = 0; 6377a623c03SMauro Carvalho Chehab mci->ue_noinfo_count = 0; 6387a623c03SMauro Carvalho Chehab mci->ce_noinfo_count = 0; 6397c9281d7SDouglas Thompson 6407c9281d7SDouglas Thompson for (row = 0; row < mci->nr_csrows; row++) { 641de3910ebSMauro Carvalho Chehab struct csrow_info *ri = mci->csrows[row]; 6427c9281d7SDouglas Thompson 6437c9281d7SDouglas Thompson ri->ue_count = 0; 6447c9281d7SDouglas Thompson ri->ce_count = 0; 6457c9281d7SDouglas Thompson 6467c9281d7SDouglas Thompson for (chan = 0; chan < ri->nr_channels; chan++) 647de3910ebSMauro Carvalho Chehab ri->channels[chan]->ce_count = 0; 6487c9281d7SDouglas Thompson } 6497c9281d7SDouglas Thompson 6507a623c03SMauro Carvalho Chehab cnt = 1; 6517a623c03SMauro Carvalho Chehab for (i = 0; i < mci->n_layers; i++) { 6527a623c03SMauro Carvalho Chehab cnt *= mci->layers[i].size; 6537a623c03SMauro Carvalho Chehab memset(mci->ce_per_layer[i], 0, cnt * sizeof(u32)); 6547a623c03SMauro Carvalho Chehab memset(mci->ue_per_layer[i], 0, cnt * sizeof(u32)); 6557a623c03SMauro Carvalho Chehab } 6567a623c03SMauro Carvalho Chehab 6577c9281d7SDouglas Thompson mci->start_time = jiffies; 6587c9281d7SDouglas Thompson return count; 6597c9281d7SDouglas Thompson } 6607c9281d7SDouglas Thompson 66139094443SBorislav Petkov /* Memory scrubbing interface: 66239094443SBorislav Petkov * 66339094443SBorislav Petkov * A MC driver can limit the scrubbing bandwidth based on the CPU type. 66439094443SBorislav Petkov * Therefore, ->set_sdram_scrub_rate should be made to return the actual 66539094443SBorislav Petkov * bandwidth that is accepted or 0 when scrubbing is to be disabled. 66639094443SBorislav Petkov * 66739094443SBorislav Petkov * Negative value still means that an error has occurred while setting 66839094443SBorislav Petkov * the scrub rate. 66939094443SBorislav Petkov */ 6707a623c03SMauro Carvalho Chehab static ssize_t mci_sdram_scrub_rate_store(struct device *dev, 6717a623c03SMauro Carvalho Chehab struct device_attribute *mattr, 6727c9281d7SDouglas Thompson const char *data, size_t count) 6737c9281d7SDouglas Thompson { 6747a623c03SMauro Carvalho Chehab struct mem_ctl_info *mci = to_mci(dev); 675eba042a8SBorislav Petkov unsigned long bandwidth = 0; 67639094443SBorislav Petkov int new_bw = 0; 6777c9281d7SDouglas Thompson 678c7f62fc8SJingoo Han if (kstrtoul(data, 10, &bandwidth) < 0) 679eba042a8SBorislav Petkov return -EINVAL; 680eba042a8SBorislav Petkov 68139094443SBorislav Petkov new_bw = mci->set_sdram_scrub_rate(mci, bandwidth); 6824949603aSMarkus Trippelsdorf if (new_bw < 0) { 6834949603aSMarkus Trippelsdorf edac_printk(KERN_WARNING, EDAC_MC, 6844949603aSMarkus Trippelsdorf "Error setting scrub rate to: %lu\n", bandwidth); 6854949603aSMarkus Trippelsdorf return -EINVAL; 6867c9281d7SDouglas Thompson } 6877c9281d7SDouglas Thompson 6884949603aSMarkus Trippelsdorf return count; 6897c9281d7SDouglas Thompson } 690eba042a8SBorislav Petkov 69139094443SBorislav Petkov /* 69239094443SBorislav Petkov * ->get_sdram_scrub_rate() return value semantics same as above. 69339094443SBorislav Petkov */ 6947a623c03SMauro Carvalho Chehab static ssize_t mci_sdram_scrub_rate_show(struct device *dev, 6957a623c03SMauro Carvalho Chehab struct device_attribute *mattr, 6967a623c03SMauro Carvalho Chehab char *data) 69739094443SBorislav Petkov { 6987a623c03SMauro Carvalho Chehab struct mem_ctl_info *mci = to_mci(dev); 69939094443SBorislav Petkov int bandwidth = 0; 70039094443SBorislav Petkov 70139094443SBorislav Petkov bandwidth = mci->get_sdram_scrub_rate(mci); 70239094443SBorislav Petkov if (bandwidth < 0) { 703eba042a8SBorislav Petkov edac_printk(KERN_DEBUG, EDAC_MC, "Error reading scrub rate\n"); 70439094443SBorislav Petkov return bandwidth; 705eba042a8SBorislav Petkov } 70639094443SBorislav Petkov 7077c9281d7SDouglas Thompson return sprintf(data, "%d\n", bandwidth); 7087c9281d7SDouglas Thompson } 7097c9281d7SDouglas Thompson 7107c9281d7SDouglas Thompson /* default attribute files for the MCI object */ 7117a623c03SMauro Carvalho Chehab static ssize_t mci_ue_count_show(struct device *dev, 7127a623c03SMauro Carvalho Chehab struct device_attribute *mattr, 7137a623c03SMauro Carvalho Chehab char *data) 7147c9281d7SDouglas Thompson { 7157a623c03SMauro Carvalho Chehab struct mem_ctl_info *mci = to_mci(dev); 7167a623c03SMauro Carvalho Chehab 7175926ff50SMauro Carvalho Chehab return sprintf(data, "%d\n", mci->ue_mc); 7187c9281d7SDouglas Thompson } 7197c9281d7SDouglas Thompson 7207a623c03SMauro Carvalho Chehab static ssize_t mci_ce_count_show(struct device *dev, 7217a623c03SMauro Carvalho Chehab struct device_attribute *mattr, 7227a623c03SMauro Carvalho Chehab char *data) 7237c9281d7SDouglas Thompson { 7247a623c03SMauro Carvalho Chehab struct mem_ctl_info *mci = to_mci(dev); 7257a623c03SMauro Carvalho Chehab 7265926ff50SMauro Carvalho Chehab return sprintf(data, "%d\n", mci->ce_mc); 7277c9281d7SDouglas Thompson } 7287c9281d7SDouglas Thompson 7297a623c03SMauro Carvalho Chehab static ssize_t mci_ce_noinfo_show(struct device *dev, 7307a623c03SMauro Carvalho Chehab struct device_attribute *mattr, 7317a623c03SMauro Carvalho Chehab char *data) 7327c9281d7SDouglas Thompson { 7337a623c03SMauro Carvalho Chehab struct mem_ctl_info *mci = to_mci(dev); 7347a623c03SMauro Carvalho Chehab 7357c9281d7SDouglas Thompson return sprintf(data, "%d\n", mci->ce_noinfo_count); 7367c9281d7SDouglas Thompson } 7377c9281d7SDouglas Thompson 7387a623c03SMauro Carvalho Chehab static ssize_t mci_ue_noinfo_show(struct device *dev, 7397a623c03SMauro Carvalho Chehab struct device_attribute *mattr, 7407a623c03SMauro Carvalho Chehab char *data) 7417c9281d7SDouglas Thompson { 7427a623c03SMauro Carvalho Chehab struct mem_ctl_info *mci = to_mci(dev); 7437a623c03SMauro Carvalho Chehab 7447c9281d7SDouglas Thompson return sprintf(data, "%d\n", mci->ue_noinfo_count); 7457c9281d7SDouglas Thompson } 7467c9281d7SDouglas Thompson 7477a623c03SMauro Carvalho Chehab static ssize_t mci_seconds_show(struct device *dev, 7487a623c03SMauro Carvalho Chehab struct device_attribute *mattr, 7497a623c03SMauro Carvalho Chehab char *data) 7507c9281d7SDouglas Thompson { 7517a623c03SMauro Carvalho Chehab struct mem_ctl_info *mci = to_mci(dev); 7527a623c03SMauro Carvalho Chehab 7537c9281d7SDouglas Thompson return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ); 7547c9281d7SDouglas Thompson } 7557c9281d7SDouglas Thompson 7567a623c03SMauro Carvalho Chehab static ssize_t mci_ctl_name_show(struct device *dev, 7577a623c03SMauro Carvalho Chehab struct device_attribute *mattr, 7587a623c03SMauro Carvalho Chehab char *data) 7597c9281d7SDouglas Thompson { 7607a623c03SMauro Carvalho Chehab struct mem_ctl_info *mci = to_mci(dev); 7617a623c03SMauro Carvalho Chehab 7627c9281d7SDouglas Thompson return sprintf(data, "%s\n", mci->ctl_name); 7637c9281d7SDouglas Thompson } 7647c9281d7SDouglas Thompson 7657a623c03SMauro Carvalho Chehab static ssize_t mci_size_mb_show(struct device *dev, 7667a623c03SMauro Carvalho Chehab struct device_attribute *mattr, 7677a623c03SMauro Carvalho Chehab char *data) 7687c9281d7SDouglas Thompson { 7697a623c03SMauro Carvalho Chehab struct mem_ctl_info *mci = to_mci(dev); 770a895bf8bSMauro Carvalho Chehab int total_pages = 0, csrow_idx, j; 7717c9281d7SDouglas Thompson 772a895bf8bSMauro Carvalho Chehab for (csrow_idx = 0; csrow_idx < mci->nr_csrows; csrow_idx++) { 773de3910ebSMauro Carvalho Chehab struct csrow_info *csrow = mci->csrows[csrow_idx]; 7747c9281d7SDouglas Thompson 775a895bf8bSMauro Carvalho Chehab for (j = 0; j < csrow->nr_channels; j++) { 776de3910ebSMauro Carvalho Chehab struct dimm_info *dimm = csrow->channels[j]->dimm; 7777c9281d7SDouglas Thompson 778a895bf8bSMauro Carvalho Chehab total_pages += dimm->nr_pages; 779a895bf8bSMauro Carvalho Chehab } 7807c9281d7SDouglas Thompson } 7817c9281d7SDouglas Thompson 7827c9281d7SDouglas Thompson return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages)); 7837c9281d7SDouglas Thompson } 7847c9281d7SDouglas Thompson 7858ad6c78aSMauro Carvalho Chehab static ssize_t mci_max_location_show(struct device *dev, 7868ad6c78aSMauro Carvalho Chehab struct device_attribute *mattr, 7878ad6c78aSMauro Carvalho Chehab char *data) 7888ad6c78aSMauro Carvalho Chehab { 7898ad6c78aSMauro Carvalho Chehab struct mem_ctl_info *mci = to_mci(dev); 7908ad6c78aSMauro Carvalho Chehab int i; 7918ad6c78aSMauro Carvalho Chehab char *p = data; 7928ad6c78aSMauro Carvalho Chehab 7938ad6c78aSMauro Carvalho Chehab for (i = 0; i < mci->n_layers; i++) { 7948ad6c78aSMauro Carvalho Chehab p += sprintf(p, "%s %d ", 7958ad6c78aSMauro Carvalho Chehab edac_layer_name[mci->layers[i].type], 7968ad6c78aSMauro Carvalho Chehab mci->layers[i].size - 1); 7978ad6c78aSMauro Carvalho Chehab } 7988ad6c78aSMauro Carvalho Chehab 7998ad6c78aSMauro Carvalho Chehab return p - data; 8008ad6c78aSMauro Carvalho Chehab } 8018ad6c78aSMauro Carvalho Chehab 8027c9281d7SDouglas Thompson /* default Control file */ 803f11135d8SBorislav Petkov static DEVICE_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store); 8047c9281d7SDouglas Thompson 8057c9281d7SDouglas Thompson /* default Attribute files */ 806f11135d8SBorislav Petkov static DEVICE_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL); 807f11135d8SBorislav Petkov static DEVICE_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL); 808f11135d8SBorislav Petkov static DEVICE_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL); 809f11135d8SBorislav Petkov static DEVICE_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL); 810f11135d8SBorislav Petkov static DEVICE_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL); 811f11135d8SBorislav Petkov static DEVICE_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL); 812f11135d8SBorislav Petkov static DEVICE_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL); 813f11135d8SBorislav Petkov static DEVICE_ATTR(max_location, S_IRUGO, mci_max_location_show, NULL); 8147c9281d7SDouglas Thompson 8157c9281d7SDouglas Thompson /* memory scrubber attribute file */ 8162c1946b6STakashi Iwai DEVICE_ATTR(sdram_scrub_rate, 0, mci_sdram_scrub_rate_show, 8172c1946b6STakashi Iwai mci_sdram_scrub_rate_store); /* umode set later in is_visible */ 8187c9281d7SDouglas Thompson 8197a623c03SMauro Carvalho Chehab static struct attribute *mci_attrs[] = { 8207a623c03SMauro Carvalho Chehab &dev_attr_reset_counters.attr, 8217a623c03SMauro Carvalho Chehab &dev_attr_mc_name.attr, 8227a623c03SMauro Carvalho Chehab &dev_attr_size_mb.attr, 8237a623c03SMauro Carvalho Chehab &dev_attr_seconds_since_reset.attr, 8247a623c03SMauro Carvalho Chehab &dev_attr_ue_noinfo_count.attr, 8257a623c03SMauro Carvalho Chehab &dev_attr_ce_noinfo_count.attr, 8267a623c03SMauro Carvalho Chehab &dev_attr_ue_count.attr, 8277a623c03SMauro Carvalho Chehab &dev_attr_ce_count.attr, 8288ad6c78aSMauro Carvalho Chehab &dev_attr_max_location.attr, 8292c1946b6STakashi Iwai &dev_attr_sdram_scrub_rate.attr, 8307c9281d7SDouglas Thompson NULL 8317c9281d7SDouglas Thompson }; 8327c9281d7SDouglas Thompson 8332c1946b6STakashi Iwai static umode_t mci_attr_is_visible(struct kobject *kobj, 8342c1946b6STakashi Iwai struct attribute *attr, int idx) 8352c1946b6STakashi Iwai { 8362c1946b6STakashi Iwai struct device *dev = kobj_to_dev(kobj); 8372c1946b6STakashi Iwai struct mem_ctl_info *mci = to_mci(dev); 8382c1946b6STakashi Iwai umode_t mode = 0; 8392c1946b6STakashi Iwai 8402c1946b6STakashi Iwai if (attr != &dev_attr_sdram_scrub_rate.attr) 8412c1946b6STakashi Iwai return attr->mode; 8422c1946b6STakashi Iwai if (mci->get_sdram_scrub_rate) 8432c1946b6STakashi Iwai mode |= S_IRUGO; 8442c1946b6STakashi Iwai if (mci->set_sdram_scrub_rate) 8452c1946b6STakashi Iwai mode |= S_IWUSR; 8462c1946b6STakashi Iwai return mode; 8472c1946b6STakashi Iwai } 8482c1946b6STakashi Iwai 8497a623c03SMauro Carvalho Chehab static struct attribute_group mci_attr_grp = { 8507a623c03SMauro Carvalho Chehab .attrs = mci_attrs, 8512c1946b6STakashi Iwai .is_visible = mci_attr_is_visible, 8527c9281d7SDouglas Thompson }; 8537c9281d7SDouglas Thompson 8547a623c03SMauro Carvalho Chehab static const struct attribute_group *mci_attr_groups[] = { 8557a623c03SMauro Carvalho Chehab &mci_attr_grp, 8567a623c03SMauro Carvalho Chehab NULL 857cc301b3aSMauro Carvalho Chehab }; 858cc301b3aSMauro Carvalho Chehab 859de3910ebSMauro Carvalho Chehab static void mci_attr_release(struct device *dev) 8607a623c03SMauro Carvalho Chehab { 861de3910ebSMauro Carvalho Chehab struct mem_ctl_info *mci = container_of(dev, struct mem_ctl_info, dev); 862de3910ebSMauro Carvalho Chehab 863956b9ba1SJoe Perches edac_dbg(1, "Releasing csrow device %s\n", dev_name(dev)); 864de3910ebSMauro Carvalho Chehab kfree(mci); 8657a623c03SMauro Carvalho Chehab } 8667a623c03SMauro Carvalho Chehab 8677a623c03SMauro Carvalho Chehab static struct device_type mci_attr_type = { 8687a623c03SMauro Carvalho Chehab .groups = mci_attr_groups, 8697a623c03SMauro Carvalho Chehab .release = mci_attr_release, 870cc301b3aSMauro Carvalho Chehab }; 871cc301b3aSMauro Carvalho Chehab 8727c9281d7SDouglas Thompson /* 8737c9281d7SDouglas Thompson * Create a new Memory Controller kobject instance, 8747c9281d7SDouglas Thompson * mc<id> under the 'mc' directory 8757c9281d7SDouglas Thompson * 8767c9281d7SDouglas Thompson * Return: 8777c9281d7SDouglas Thompson * 0 Success 8787c9281d7SDouglas Thompson * !0 Failure 8797c9281d7SDouglas Thompson */ 8804e8d230dSTakashi Iwai int edac_create_sysfs_mci_device(struct mem_ctl_info *mci, 8814e8d230dSTakashi Iwai const struct attribute_group **groups) 8827c9281d7SDouglas Thompson { 88312e26969SBorislav Petkov char *name; 8847a623c03SMauro Carvalho Chehab int i, err; 8857c9281d7SDouglas Thompson 8867a623c03SMauro Carvalho Chehab /* 8877a623c03SMauro Carvalho Chehab * The memory controller needs its own bus, in order to avoid 8887a623c03SMauro Carvalho Chehab * namespace conflicts at /sys/bus/edac. 88942a8e397SDouglas Thompson */ 89012e26969SBorislav Petkov name = kasprintf(GFP_KERNEL, "mc%d", mci->mc_idx); 89112e26969SBorislav Petkov if (!name) 892de3910ebSMauro Carvalho Chehab return -ENOMEM; 89388d84ac9SBorislav Petkov 89412e26969SBorislav Petkov mci->bus->name = name; 89512e26969SBorislav Petkov 89688d84ac9SBorislav Petkov edac_dbg(0, "creating bus %s\n", mci->bus->name); 89788d84ac9SBorislav Petkov 89888d84ac9SBorislav Petkov err = bus_register(mci->bus); 89912e26969SBorislav Petkov if (err < 0) { 90012e26969SBorislav Petkov kfree(name); 90112e26969SBorislav Petkov return err; 90212e26969SBorislav Petkov } 9037a623c03SMauro Carvalho Chehab 904de3910ebSMauro Carvalho Chehab /* get the /sys/devices/system/edac subsys reference */ 905de3910ebSMauro Carvalho Chehab mci->dev.type = &mci_attr_type; 906de3910ebSMauro Carvalho Chehab device_initialize(&mci->dev); 907de3910ebSMauro Carvalho Chehab 908de3910ebSMauro Carvalho Chehab mci->dev.parent = mci_pdev; 90988d84ac9SBorislav Petkov mci->dev.bus = mci->bus; 9104e8d230dSTakashi Iwai mci->dev.groups = groups; 911de3910ebSMauro Carvalho Chehab dev_set_name(&mci->dev, "mc%d", mci->mc_idx); 912de3910ebSMauro Carvalho Chehab dev_set_drvdata(&mci->dev, mci); 913de3910ebSMauro Carvalho Chehab pm_runtime_forbid(&mci->dev); 914de3910ebSMauro Carvalho Chehab 915956b9ba1SJoe Perches edac_dbg(0, "creating device %s\n", dev_name(&mci->dev)); 9167a623c03SMauro Carvalho Chehab err = device_add(&mci->dev); 9177a623c03SMauro Carvalho Chehab if (err < 0) { 9183d958823SMauro Carvalho Chehab edac_dbg(1, "failure: create device %s\n", dev_name(&mci->dev)); 9191bf1950cSJunjie Mao goto fail_unregister_bus; 9208096cfafSDoug Thompson } 92142a8e397SDouglas Thompson 9227a623c03SMauro Carvalho Chehab /* 9237a623c03SMauro Carvalho Chehab * Create the dimm/rank devices 9247c9281d7SDouglas Thompson */ 9257a623c03SMauro Carvalho Chehab for (i = 0; i < mci->tot_dimms; i++) { 926de3910ebSMauro Carvalho Chehab struct dimm_info *dimm = mci->dimms[i]; 9277a623c03SMauro Carvalho Chehab /* Only expose populated DIMMs */ 9281bf1950cSJunjie Mao if (!dimm->nr_pages) 9297a623c03SMauro Carvalho Chehab continue; 9301bf1950cSJunjie Mao 9317a623c03SMauro Carvalho Chehab #ifdef CONFIG_EDAC_DEBUG 932956b9ba1SJoe Perches edac_dbg(1, "creating dimm%d, located at ", i); 9337a623c03SMauro Carvalho Chehab if (edac_debug_level >= 1) { 9347a623c03SMauro Carvalho Chehab int lay; 9357a623c03SMauro Carvalho Chehab for (lay = 0; lay < mci->n_layers; lay++) 9367a623c03SMauro Carvalho Chehab printk(KERN_CONT "%s %d ", 9377a623c03SMauro Carvalho Chehab edac_layer_name[mci->layers[lay].type], 9387a623c03SMauro Carvalho Chehab dimm->location[lay]); 9397a623c03SMauro Carvalho Chehab printk(KERN_CONT "\n"); 9407c9281d7SDouglas Thompson } 9417a623c03SMauro Carvalho Chehab #endif 94219974710SMauro Carvalho Chehab err = edac_create_dimm_object(mci, dimm, i); 94319974710SMauro Carvalho Chehab if (err) { 944956b9ba1SJoe Perches edac_dbg(1, "failure: create dimm %d obj\n", i); 9451bf1950cSJunjie Mao goto fail_unregister_dimm; 94619974710SMauro Carvalho Chehab } 9477c9281d7SDouglas Thompson } 9487a623c03SMauro Carvalho Chehab 94919974710SMauro Carvalho Chehab #ifdef CONFIG_EDAC_LEGACY_SYSFS 9507a623c03SMauro Carvalho Chehab err = edac_create_csrow_objects(mci); 9517a623c03SMauro Carvalho Chehab if (err < 0) 9521bf1950cSJunjie Mao goto fail_unregister_dimm; 95319974710SMauro Carvalho Chehab #endif 9547c9281d7SDouglas Thompson 9557ac8bf9bSBorislav Petkov edac_create_debugfs_nodes(mci); 9567c9281d7SDouglas Thompson return 0; 9577c9281d7SDouglas Thompson 9581bf1950cSJunjie Mao fail_unregister_dimm: 9597c9281d7SDouglas Thompson for (i--; i >= 0; i--) { 960de3910ebSMauro Carvalho Chehab struct dimm_info *dimm = mci->dimms[i]; 9611bf1950cSJunjie Mao if (!dimm->nr_pages) 9627a623c03SMauro Carvalho Chehab continue; 9631bf1950cSJunjie Mao 96444d22e24SLans Zhang device_unregister(&dimm->dev); 9657c9281d7SDouglas Thompson } 96644d22e24SLans Zhang device_unregister(&mci->dev); 9671bf1950cSJunjie Mao fail_unregister_bus: 96888d84ac9SBorislav Petkov bus_unregister(mci->bus); 96912e26969SBorislav Petkov kfree(name); 97012e26969SBorislav Petkov 9717c9281d7SDouglas Thompson return err; 9727c9281d7SDouglas Thompson } 9737c9281d7SDouglas Thompson 9747c9281d7SDouglas Thompson /* 9757c9281d7SDouglas Thompson * remove a Memory Controller instance 9767c9281d7SDouglas Thompson */ 9777c9281d7SDouglas Thompson void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci) 9787c9281d7SDouglas Thompson { 9797a623c03SMauro Carvalho Chehab int i; 9807c9281d7SDouglas Thompson 981956b9ba1SJoe Perches edac_dbg(0, "\n"); 9827c9281d7SDouglas Thompson 983452a6bf9SMauro Carvalho Chehab #ifdef CONFIG_EDAC_DEBUG 98430f84a89STan Xiaojun edac_debugfs_remove_recursive(mci->debugfs); 985452a6bf9SMauro Carvalho Chehab #endif 98619974710SMauro Carvalho Chehab #ifdef CONFIG_EDAC_LEGACY_SYSFS 9877a623c03SMauro Carvalho Chehab edac_delete_csrow_objects(mci); 98819974710SMauro Carvalho Chehab #endif 989a895bf8bSMauro Carvalho Chehab 9907a623c03SMauro Carvalho Chehab for (i = 0; i < mci->tot_dimms; i++) { 991de3910ebSMauro Carvalho Chehab struct dimm_info *dimm = mci->dimms[i]; 9927a623c03SMauro Carvalho Chehab if (dimm->nr_pages == 0) 9937a623c03SMauro Carvalho Chehab continue; 994956b9ba1SJoe Perches edac_dbg(0, "removing device %s\n", dev_name(&dimm->dev)); 99544d22e24SLans Zhang device_unregister(&dimm->dev); 9967c9281d7SDouglas Thompson } 9977c9281d7SDouglas Thompson } 9987c9281d7SDouglas Thompson 9997a623c03SMauro Carvalho Chehab void edac_unregister_sysfs(struct mem_ctl_info *mci) 10008096cfafSDoug Thompson { 100112e26969SBorislav Petkov const char *name = mci->bus->name; 100212e26969SBorislav Petkov 1003956b9ba1SJoe Perches edac_dbg(1, "Unregistering device %s\n", dev_name(&mci->dev)); 100444d22e24SLans Zhang device_unregister(&mci->dev); 100588d84ac9SBorislav Petkov bus_unregister(mci->bus); 100612e26969SBorislav Petkov kfree(name); 10077a623c03SMauro Carvalho Chehab } 10088096cfafSDoug Thompson 1009de3910ebSMauro Carvalho Chehab static void mc_attr_release(struct device *dev) 10107a623c03SMauro Carvalho Chehab { 1011de3910ebSMauro Carvalho Chehab /* 1012de3910ebSMauro Carvalho Chehab * There's no container structure here, as this is just the mci 1013de3910ebSMauro Carvalho Chehab * parent device, used to create the /sys/devices/mc sysfs node. 1014de3910ebSMauro Carvalho Chehab * So, there are no attributes on it. 1015de3910ebSMauro Carvalho Chehab */ 1016956b9ba1SJoe Perches edac_dbg(1, "Releasing device %s\n", dev_name(dev)); 1017de3910ebSMauro Carvalho Chehab kfree(dev); 10187a623c03SMauro Carvalho Chehab } 10197a623c03SMauro Carvalho Chehab 10207a623c03SMauro Carvalho Chehab static struct device_type mc_attr_type = { 10217a623c03SMauro Carvalho Chehab .release = mc_attr_release, 10227a623c03SMauro Carvalho Chehab }; 10237a623c03SMauro Carvalho Chehab /* 10247a623c03SMauro Carvalho Chehab * Init/exit code for the module. Basically, creates/removes /sys/class/rc 10257a623c03SMauro Carvalho Chehab */ 10267a623c03SMauro Carvalho Chehab int __init edac_mc_sysfs_init(void) 10277a623c03SMauro Carvalho Chehab { 10287a623c03SMauro Carvalho Chehab struct bus_type *edac_subsys; 10297a623c03SMauro Carvalho Chehab int err; 10308096cfafSDoug Thompson 1031fe5ff8b8SKay Sievers /* get the /sys/devices/system/edac subsys reference */ 1032fe5ff8b8SKay Sievers edac_subsys = edac_get_sysfs_subsys(); 1033fe5ff8b8SKay Sievers if (edac_subsys == NULL) { 1034956b9ba1SJoe Perches edac_dbg(1, "no edac_subsys\n"); 10352d56b109SDenis Kirjanov err = -EINVAL; 10362d56b109SDenis Kirjanov goto out; 10378096cfafSDoug Thompson } 10388096cfafSDoug Thompson 1039de3910ebSMauro Carvalho Chehab mci_pdev = kzalloc(sizeof(*mci_pdev), GFP_KERNEL); 10402d56b109SDenis Kirjanov if (!mci_pdev) { 10412d56b109SDenis Kirjanov err = -ENOMEM; 1042733476cfSBorislav Petkov goto out; 10432d56b109SDenis Kirjanov } 10448096cfafSDoug Thompson 1045de3910ebSMauro Carvalho Chehab mci_pdev->bus = edac_subsys; 1046de3910ebSMauro Carvalho Chehab mci_pdev->type = &mc_attr_type; 1047de3910ebSMauro Carvalho Chehab device_initialize(mci_pdev); 1048de3910ebSMauro Carvalho Chehab dev_set_name(mci_pdev, "mc"); 1049de3910ebSMauro Carvalho Chehab 1050de3910ebSMauro Carvalho Chehab err = device_add(mci_pdev); 10517a623c03SMauro Carvalho Chehab if (err < 0) 10522d56b109SDenis Kirjanov goto out_dev_free; 10538096cfafSDoug Thompson 1054956b9ba1SJoe Perches edac_dbg(0, "device %s created\n", dev_name(mci_pdev)); 1055de3910ebSMauro Carvalho Chehab 10568096cfafSDoug Thompson return 0; 10572d56b109SDenis Kirjanov 10582d56b109SDenis Kirjanov out_dev_free: 10592d56b109SDenis Kirjanov kfree(mci_pdev); 10602d56b109SDenis Kirjanov out: 10612d56b109SDenis Kirjanov return err; 10628096cfafSDoug Thompson } 10638096cfafSDoug Thompson 1064c6b97bcfSAlexey Khoroshilov void edac_mc_sysfs_exit(void) 10658096cfafSDoug Thompson { 106644d22e24SLans Zhang device_unregister(mci_pdev); 10678096cfafSDoug Thompson } 1068