Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1 | /* |
| 2 | * edac_mc kernel module |
| 3 | * (C) 2005 Linux Networx (http://lnxi.com) |
| 4 | * This file may be distributed under the terms of the |
| 5 | * GNU General Public License. |
| 6 | * |
| 7 | * Written by Thayne Harbaugh |
| 8 | * Based on work by Dan Hollis <goemon at anime dot net> and others. |
| 9 | * http://www.anime.net/~goemon/linux-ecc/ |
| 10 | * |
| 11 | * Modified by Dave Peterson and Doug Thompson |
| 12 | * |
| 13 | */ |
| 14 | |
| 15 | |
| 16 | #include <linux/config.h> |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 17 | #include <linux/module.h> |
| 18 | #include <linux/proc_fs.h> |
| 19 | #include <linux/kernel.h> |
| 20 | #include <linux/types.h> |
| 21 | #include <linux/smp.h> |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/sysctl.h> |
| 24 | #include <linux/highmem.h> |
| 25 | #include <linux/timer.h> |
| 26 | #include <linux/slab.h> |
| 27 | #include <linux/jiffies.h> |
| 28 | #include <linux/spinlock.h> |
| 29 | #include <linux/list.h> |
| 30 | #include <linux/sysdev.h> |
| 31 | #include <linux/ctype.h> |
Dave Peterson | f2fe42a | 2006-03-26 01:38:38 -0800 | [diff] [blame] | 32 | #include <linux/kthread.h> |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 33 | |
| 34 | #include <asm/uaccess.h> |
| 35 | #include <asm/page.h> |
| 36 | #include <asm/edac.h> |
| 37 | |
| 38 | #include "edac_mc.h" |
| 39 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 40 | #define EDAC_MC_VERSION "Ver: 2.0.0 " __DATE__ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 41 | |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 42 | /* For now, disable the EDAC sysfs code. The sysfs interface that EDAC |
| 43 | * presents to user space needs more thought, and is likely to change |
| 44 | * substantially. |
| 45 | */ |
| 46 | #define DISABLE_EDAC_SYSFS |
| 47 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 48 | #ifdef CONFIG_EDAC_DEBUG |
| 49 | /* Values of 0 to 4 will generate output */ |
| 50 | int edac_debug_level = 1; |
| 51 | EXPORT_SYMBOL(edac_debug_level); |
| 52 | #endif |
| 53 | |
| 54 | /* EDAC Controls, setable by module parameter, and sysfs */ |
| 55 | static int log_ue = 1; |
| 56 | static int log_ce = 1; |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 57 | static int panic_on_ue; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 58 | static int poll_msec = 1000; |
| 59 | |
| 60 | static int check_pci_parity = 0; /* default YES check PCI parity */ |
| 61 | static int panic_on_pci_parity; /* default no panic on PCI Parity */ |
| 62 | static atomic_t pci_parity_count = ATOMIC_INIT(0); |
| 63 | |
| 64 | /* lock to memory controller's control array */ |
| 65 | static DECLARE_MUTEX(mem_ctls_mutex); |
| 66 | static struct list_head mc_devices = LIST_HEAD_INIT(mc_devices); |
| 67 | |
Dave Peterson | f2fe42a | 2006-03-26 01:38:38 -0800 | [diff] [blame] | 68 | static struct task_struct *edac_thread; |
| 69 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 70 | /* Structure of the whitelist and blacklist arrays */ |
| 71 | struct edac_pci_device_list { |
| 72 | unsigned int vendor; /* Vendor ID */ |
| 73 | unsigned int device; /* Deviice ID */ |
| 74 | }; |
| 75 | |
| 76 | |
| 77 | #define MAX_LISTED_PCI_DEVICES 32 |
| 78 | |
| 79 | /* List of PCI devices (vendor-id:device-id) that should be skipped */ |
| 80 | static struct edac_pci_device_list pci_blacklist[MAX_LISTED_PCI_DEVICES]; |
| 81 | static int pci_blacklist_count; |
| 82 | |
| 83 | /* List of PCI devices (vendor-id:device-id) that should be scanned */ |
| 84 | static struct edac_pci_device_list pci_whitelist[MAX_LISTED_PCI_DEVICES]; |
| 85 | static int pci_whitelist_count ; |
| 86 | |
| 87 | /* START sysfs data and methods */ |
| 88 | |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 89 | #ifndef DISABLE_EDAC_SYSFS |
| 90 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 91 | static const char *mem_types[] = { |
| 92 | [MEM_EMPTY] = "Empty", |
| 93 | [MEM_RESERVED] = "Reserved", |
| 94 | [MEM_UNKNOWN] = "Unknown", |
| 95 | [MEM_FPM] = "FPM", |
| 96 | [MEM_EDO] = "EDO", |
| 97 | [MEM_BEDO] = "BEDO", |
| 98 | [MEM_SDR] = "Unbuffered-SDR", |
| 99 | [MEM_RDR] = "Registered-SDR", |
| 100 | [MEM_DDR] = "Unbuffered-DDR", |
| 101 | [MEM_RDDR] = "Registered-DDR", |
| 102 | [MEM_RMBS] = "RMBS" |
| 103 | }; |
| 104 | |
| 105 | static const char *dev_types[] = { |
| 106 | [DEV_UNKNOWN] = "Unknown", |
| 107 | [DEV_X1] = "x1", |
| 108 | [DEV_X2] = "x2", |
| 109 | [DEV_X4] = "x4", |
| 110 | [DEV_X8] = "x8", |
| 111 | [DEV_X16] = "x16", |
| 112 | [DEV_X32] = "x32", |
| 113 | [DEV_X64] = "x64" |
| 114 | }; |
| 115 | |
| 116 | static const char *edac_caps[] = { |
| 117 | [EDAC_UNKNOWN] = "Unknown", |
| 118 | [EDAC_NONE] = "None", |
| 119 | [EDAC_RESERVED] = "Reserved", |
| 120 | [EDAC_PARITY] = "PARITY", |
| 121 | [EDAC_EC] = "EC", |
| 122 | [EDAC_SECDED] = "SECDED", |
| 123 | [EDAC_S2ECD2ED] = "S2ECD2ED", |
| 124 | [EDAC_S4ECD4ED] = "S4ECD4ED", |
| 125 | [EDAC_S8ECD8ED] = "S8ECD8ED", |
| 126 | [EDAC_S16ECD16ED] = "S16ECD16ED" |
| 127 | }; |
| 128 | |
| 129 | |
| 130 | /* sysfs object: /sys/devices/system/edac */ |
| 131 | static struct sysdev_class edac_class = { |
| 132 | set_kset_name("edac"), |
| 133 | }; |
| 134 | |
| 135 | /* sysfs objects: |
| 136 | * /sys/devices/system/edac/mc |
| 137 | * /sys/devices/system/edac/pci |
| 138 | */ |
| 139 | static struct kobject edac_memctrl_kobj; |
| 140 | static struct kobject edac_pci_kobj; |
| 141 | |
| 142 | /* |
| 143 | * /sys/devices/system/edac/mc; |
| 144 | * data structures and methods |
| 145 | */ |
Arjan van de Ven | 4136cab | 2006-03-11 03:27:15 -0800 | [diff] [blame] | 146 | #if 0 |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 147 | static ssize_t memctrl_string_show(void *ptr, char *buffer) |
| 148 | { |
| 149 | char *value = (char*) ptr; |
| 150 | return sprintf(buffer, "%s\n", value); |
| 151 | } |
Arjan van de Ven | 4136cab | 2006-03-11 03:27:15 -0800 | [diff] [blame] | 152 | #endif |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 153 | |
| 154 | static ssize_t memctrl_int_show(void *ptr, char *buffer) |
| 155 | { |
| 156 | int *value = (int*) ptr; |
| 157 | return sprintf(buffer, "%d\n", *value); |
| 158 | } |
| 159 | |
| 160 | static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count) |
| 161 | { |
| 162 | int *value = (int*) ptr; |
| 163 | |
| 164 | if (isdigit(*buffer)) |
| 165 | *value = simple_strtoul(buffer, NULL, 0); |
| 166 | |
| 167 | return count; |
| 168 | } |
| 169 | |
| 170 | struct memctrl_dev_attribute { |
| 171 | struct attribute attr; |
| 172 | void *value; |
| 173 | ssize_t (*show)(void *,char *); |
| 174 | ssize_t (*store)(void *, const char *, size_t); |
| 175 | }; |
| 176 | |
| 177 | /* Set of show/store abstract level functions for memory control object */ |
| 178 | static ssize_t |
| 179 | memctrl_dev_show(struct kobject *kobj, struct attribute *attr, char *buffer) |
| 180 | { |
| 181 | struct memctrl_dev_attribute *memctrl_dev; |
| 182 | memctrl_dev = (struct memctrl_dev_attribute*)attr; |
| 183 | |
| 184 | if (memctrl_dev->show) |
| 185 | return memctrl_dev->show(memctrl_dev->value, buffer); |
| 186 | return -EIO; |
| 187 | } |
| 188 | |
| 189 | static ssize_t |
| 190 | memctrl_dev_store(struct kobject *kobj, struct attribute *attr, |
| 191 | const char *buffer, size_t count) |
| 192 | { |
| 193 | struct memctrl_dev_attribute *memctrl_dev; |
| 194 | memctrl_dev = (struct memctrl_dev_attribute*)attr; |
| 195 | |
| 196 | if (memctrl_dev->store) |
| 197 | return memctrl_dev->store(memctrl_dev->value, buffer, count); |
| 198 | return -EIO; |
| 199 | } |
| 200 | |
| 201 | static struct sysfs_ops memctrlfs_ops = { |
| 202 | .show = memctrl_dev_show, |
| 203 | .store = memctrl_dev_store |
| 204 | }; |
| 205 | |
| 206 | #define MEMCTRL_ATTR(_name,_mode,_show,_store) \ |
| 207 | struct memctrl_dev_attribute attr_##_name = { \ |
| 208 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 209 | .value = &_name, \ |
| 210 | .show = _show, \ |
| 211 | .store = _store, \ |
| 212 | }; |
| 213 | |
| 214 | #define MEMCTRL_STRING_ATTR(_name,_data,_mode,_show,_store) \ |
| 215 | struct memctrl_dev_attribute attr_##_name = { \ |
| 216 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 217 | .value = _data, \ |
| 218 | .show = _show, \ |
| 219 | .store = _store, \ |
| 220 | }; |
| 221 | |
| 222 | /* cwrow<id> attribute f*/ |
Arjan van de Ven | 4136cab | 2006-03-11 03:27:15 -0800 | [diff] [blame] | 223 | #if 0 |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 224 | MEMCTRL_STRING_ATTR(mc_version,EDAC_MC_VERSION,S_IRUGO,memctrl_string_show,NULL); |
Arjan van de Ven | 4136cab | 2006-03-11 03:27:15 -0800 | [diff] [blame] | 225 | #endif |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 226 | |
| 227 | /* csrow<id> control files */ |
| 228 | MEMCTRL_ATTR(panic_on_ue,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store); |
| 229 | MEMCTRL_ATTR(log_ue,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store); |
| 230 | MEMCTRL_ATTR(log_ce,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store); |
| 231 | MEMCTRL_ATTR(poll_msec,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store); |
| 232 | |
| 233 | |
| 234 | /* Base Attributes of the memory ECC object */ |
| 235 | static struct memctrl_dev_attribute *memctrl_attr[] = { |
| 236 | &attr_panic_on_ue, |
| 237 | &attr_log_ue, |
| 238 | &attr_log_ce, |
| 239 | &attr_poll_msec, |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 240 | NULL, |
| 241 | }; |
| 242 | |
| 243 | /* Main MC kobject release() function */ |
| 244 | static void edac_memctrl_master_release(struct kobject *kobj) |
| 245 | { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 246 | debugf1("%s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 247 | } |
| 248 | |
| 249 | static struct kobj_type ktype_memctrl = { |
| 250 | .release = edac_memctrl_master_release, |
| 251 | .sysfs_ops = &memctrlfs_ops, |
| 252 | .default_attrs = (struct attribute **) memctrl_attr, |
| 253 | }; |
| 254 | |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 255 | #endif /* DISABLE_EDAC_SYSFS */ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 256 | |
| 257 | /* Initialize the main sysfs entries for edac: |
| 258 | * /sys/devices/system/edac |
| 259 | * |
| 260 | * and children |
| 261 | * |
| 262 | * Return: 0 SUCCESS |
| 263 | * !0 FAILURE |
| 264 | */ |
| 265 | static int edac_sysfs_memctrl_setup(void) |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 266 | #ifdef DISABLE_EDAC_SYSFS |
| 267 | { |
| 268 | return 0; |
| 269 | } |
| 270 | #else |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 271 | { |
| 272 | int err=0; |
| 273 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 274 | debugf1("%s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 275 | |
| 276 | /* create the /sys/devices/system/edac directory */ |
| 277 | err = sysdev_class_register(&edac_class); |
| 278 | if (!err) { |
| 279 | /* Init the MC's kobject */ |
| 280 | memset(&edac_memctrl_kobj, 0, sizeof (edac_memctrl_kobj)); |
| 281 | kobject_init(&edac_memctrl_kobj); |
| 282 | |
| 283 | edac_memctrl_kobj.parent = &edac_class.kset.kobj; |
| 284 | edac_memctrl_kobj.ktype = &ktype_memctrl; |
| 285 | |
| 286 | /* generate sysfs "..../edac/mc" */ |
| 287 | err = kobject_set_name(&edac_memctrl_kobj,"mc"); |
| 288 | if (!err) { |
| 289 | /* FIXME: maybe new sysdev_create_subdir() */ |
| 290 | err = kobject_register(&edac_memctrl_kobj); |
| 291 | if (err) { |
| 292 | debugf1("Failed to register '.../edac/mc'\n"); |
| 293 | } else { |
| 294 | debugf1("Registered '.../edac/mc' kobject\n"); |
| 295 | } |
| 296 | } |
| 297 | } else { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 298 | debugf1("%s() error=%d\n", __func__, err); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 299 | } |
| 300 | |
| 301 | return err; |
| 302 | } |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 303 | #endif /* DISABLE_EDAC_SYSFS */ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 304 | |
| 305 | /* |
| 306 | * MC teardown: |
| 307 | * the '..../edac/mc' kobject followed by '..../edac' itself |
| 308 | */ |
| 309 | static void edac_sysfs_memctrl_teardown(void) |
| 310 | { |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 311 | #ifndef DISABLE_EDAC_SYSFS |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 312 | debugf0("MC: " __FILE__ ": %s()\n", __func__); |
| 313 | |
| 314 | /* Unregister the MC's kobject */ |
| 315 | kobject_unregister(&edac_memctrl_kobj); |
| 316 | |
| 317 | /* release the master edac mc kobject */ |
| 318 | kobject_put(&edac_memctrl_kobj); |
| 319 | |
| 320 | /* Unregister the 'edac' object */ |
| 321 | sysdev_class_unregister(&edac_class); |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 322 | #endif /* DISABLE_EDAC_SYSFS */ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 323 | } |
| 324 | |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 325 | #ifndef DISABLE_EDAC_SYSFS |
| 326 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 327 | /* |
| 328 | * /sys/devices/system/edac/pci; |
| 329 | * data structures and methods |
| 330 | */ |
| 331 | |
| 332 | struct list_control { |
| 333 | struct edac_pci_device_list *list; |
| 334 | int *count; |
| 335 | }; |
| 336 | |
Arjan van de Ven | 4136cab | 2006-03-11 03:27:15 -0800 | [diff] [blame] | 337 | |
| 338 | #if 0 |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 339 | /* Output the list as: vendor_id:device:id<,vendor_id:device_id> */ |
| 340 | static ssize_t edac_pci_list_string_show(void *ptr, char *buffer) |
| 341 | { |
| 342 | struct list_control *listctl; |
| 343 | struct edac_pci_device_list *list; |
| 344 | char *p = buffer; |
| 345 | int len=0; |
| 346 | int i; |
| 347 | |
| 348 | listctl = ptr; |
| 349 | list = listctl->list; |
| 350 | |
| 351 | for (i = 0; i < *(listctl->count); i++, list++ ) { |
| 352 | if (len > 0) |
| 353 | len += snprintf(p + len, (PAGE_SIZE-len), ","); |
| 354 | |
| 355 | len += snprintf(p + len, |
| 356 | (PAGE_SIZE-len), |
| 357 | "%x:%x", |
| 358 | list->vendor,list->device); |
| 359 | } |
| 360 | |
| 361 | len += snprintf(p + len,(PAGE_SIZE-len), "\n"); |
| 362 | |
| 363 | return (ssize_t) len; |
| 364 | } |
| 365 | |
| 366 | /** |
| 367 | * |
| 368 | * Scan string from **s to **e looking for one 'vendor:device' tuple |
| 369 | * where each field is a hex value |
| 370 | * |
| 371 | * return 0 if an entry is NOT found |
| 372 | * return 1 if an entry is found |
| 373 | * fill in *vendor_id and *device_id with values found |
| 374 | * |
| 375 | * In both cases, make sure *s has been moved forward toward *e |
| 376 | */ |
| 377 | static int parse_one_device(const char **s,const char **e, |
| 378 | unsigned int *vendor_id, unsigned int *device_id) |
| 379 | { |
| 380 | const char *runner, *p; |
| 381 | |
| 382 | /* if null byte, we are done */ |
| 383 | if (!**s) { |
| 384 | (*s)++; /* keep *s moving */ |
| 385 | return 0; |
| 386 | } |
| 387 | |
| 388 | /* skip over newlines & whitespace */ |
| 389 | if ((**s == '\n') || isspace(**s)) { |
| 390 | (*s)++; |
| 391 | return 0; |
| 392 | } |
| 393 | |
| 394 | if (!isxdigit(**s)) { |
| 395 | (*s)++; |
| 396 | return 0; |
| 397 | } |
| 398 | |
| 399 | /* parse vendor_id */ |
| 400 | runner = *s; |
| 401 | while (runner < *e) { |
| 402 | /* scan for vendor:device delimiter */ |
| 403 | if (*runner == ':') { |
| 404 | *vendor_id = simple_strtol((char*) *s, (char**) &p, 16); |
| 405 | runner = p + 1; |
| 406 | break; |
| 407 | } |
| 408 | runner++; |
| 409 | } |
| 410 | |
| 411 | if (!isxdigit(*runner)) { |
| 412 | *s = ++runner; |
| 413 | return 0; |
| 414 | } |
| 415 | |
| 416 | /* parse device_id */ |
| 417 | if (runner < *e) { |
| 418 | *device_id = simple_strtol((char*)runner, (char**)&p, 16); |
| 419 | runner = p; |
| 420 | } |
| 421 | |
| 422 | *s = runner; |
| 423 | |
| 424 | return 1; |
| 425 | } |
| 426 | |
| 427 | static ssize_t edac_pci_list_string_store(void *ptr, const char *buffer, |
| 428 | size_t count) |
| 429 | { |
| 430 | struct list_control *listctl; |
| 431 | struct edac_pci_device_list *list; |
| 432 | unsigned int vendor_id, device_id; |
| 433 | const char *s, *e; |
| 434 | int *index; |
| 435 | |
| 436 | s = (char*)buffer; |
| 437 | e = s + count; |
| 438 | |
| 439 | listctl = ptr; |
| 440 | list = listctl->list; |
| 441 | index = listctl->count; |
| 442 | |
| 443 | *index = 0; |
| 444 | while (*index < MAX_LISTED_PCI_DEVICES) { |
| 445 | |
| 446 | if (parse_one_device(&s,&e,&vendor_id,&device_id)) { |
| 447 | list[ *index ].vendor = vendor_id; |
| 448 | list[ *index ].device = device_id; |
| 449 | (*index)++; |
| 450 | } |
| 451 | |
| 452 | /* check for all data consume */ |
| 453 | if (s >= e) |
| 454 | break; |
| 455 | } |
| 456 | |
| 457 | return count; |
| 458 | } |
| 459 | |
Arjan van de Ven | 4136cab | 2006-03-11 03:27:15 -0800 | [diff] [blame] | 460 | #endif |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 461 | static ssize_t edac_pci_int_show(void *ptr, char *buffer) |
| 462 | { |
| 463 | int *value = ptr; |
| 464 | return sprintf(buffer,"%d\n",*value); |
| 465 | } |
| 466 | |
| 467 | static ssize_t edac_pci_int_store(void *ptr, const char *buffer, size_t count) |
| 468 | { |
| 469 | int *value = ptr; |
| 470 | |
| 471 | if (isdigit(*buffer)) |
| 472 | *value = simple_strtoul(buffer,NULL,0); |
| 473 | |
| 474 | return count; |
| 475 | } |
| 476 | |
| 477 | struct edac_pci_dev_attribute { |
| 478 | struct attribute attr; |
| 479 | void *value; |
| 480 | ssize_t (*show)(void *,char *); |
| 481 | ssize_t (*store)(void *, const char *,size_t); |
| 482 | }; |
| 483 | |
| 484 | /* Set of show/store abstract level functions for PCI Parity object */ |
| 485 | static ssize_t edac_pci_dev_show(struct kobject *kobj, struct attribute *attr, |
| 486 | char *buffer) |
| 487 | { |
| 488 | struct edac_pci_dev_attribute *edac_pci_dev; |
| 489 | edac_pci_dev= (struct edac_pci_dev_attribute*)attr; |
| 490 | |
| 491 | if (edac_pci_dev->show) |
| 492 | return edac_pci_dev->show(edac_pci_dev->value, buffer); |
| 493 | return -EIO; |
| 494 | } |
| 495 | |
| 496 | static ssize_t edac_pci_dev_store(struct kobject *kobj, struct attribute *attr, |
| 497 | const char *buffer, size_t count) |
| 498 | { |
| 499 | struct edac_pci_dev_attribute *edac_pci_dev; |
| 500 | edac_pci_dev= (struct edac_pci_dev_attribute*)attr; |
| 501 | |
| 502 | if (edac_pci_dev->show) |
| 503 | return edac_pci_dev->store(edac_pci_dev->value, buffer, count); |
| 504 | return -EIO; |
| 505 | } |
| 506 | |
| 507 | static struct sysfs_ops edac_pci_sysfs_ops = { |
| 508 | .show = edac_pci_dev_show, |
| 509 | .store = edac_pci_dev_store |
| 510 | }; |
| 511 | |
| 512 | |
| 513 | #define EDAC_PCI_ATTR(_name,_mode,_show,_store) \ |
| 514 | struct edac_pci_dev_attribute edac_pci_attr_##_name = { \ |
| 515 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 516 | .value = &_name, \ |
| 517 | .show = _show, \ |
| 518 | .store = _store, \ |
| 519 | }; |
| 520 | |
| 521 | #define EDAC_PCI_STRING_ATTR(_name,_data,_mode,_show,_store) \ |
| 522 | struct edac_pci_dev_attribute edac_pci_attr_##_name = { \ |
| 523 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 524 | .value = _data, \ |
| 525 | .show = _show, \ |
| 526 | .store = _store, \ |
| 527 | }; |
| 528 | |
Arjan van de Ven | 4136cab | 2006-03-11 03:27:15 -0800 | [diff] [blame] | 529 | #if 0 |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 530 | static struct list_control pci_whitelist_control = { |
| 531 | .list = pci_whitelist, |
| 532 | .count = &pci_whitelist_count |
| 533 | }; |
| 534 | |
| 535 | static struct list_control pci_blacklist_control = { |
| 536 | .list = pci_blacklist, |
| 537 | .count = &pci_blacklist_count |
| 538 | }; |
| 539 | |
| 540 | /* whitelist attribute */ |
| 541 | EDAC_PCI_STRING_ATTR(pci_parity_whitelist, |
| 542 | &pci_whitelist_control, |
| 543 | S_IRUGO|S_IWUSR, |
| 544 | edac_pci_list_string_show, |
| 545 | edac_pci_list_string_store); |
| 546 | |
| 547 | EDAC_PCI_STRING_ATTR(pci_parity_blacklist, |
| 548 | &pci_blacklist_control, |
| 549 | S_IRUGO|S_IWUSR, |
| 550 | edac_pci_list_string_show, |
| 551 | edac_pci_list_string_store); |
Arjan van de Ven | 4136cab | 2006-03-11 03:27:15 -0800 | [diff] [blame] | 552 | #endif |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 553 | |
| 554 | /* PCI Parity control files */ |
| 555 | EDAC_PCI_ATTR(check_pci_parity,S_IRUGO|S_IWUSR,edac_pci_int_show,edac_pci_int_store); |
| 556 | EDAC_PCI_ATTR(panic_on_pci_parity,S_IRUGO|S_IWUSR,edac_pci_int_show,edac_pci_int_store); |
| 557 | EDAC_PCI_ATTR(pci_parity_count,S_IRUGO,edac_pci_int_show,NULL); |
| 558 | |
| 559 | /* Base Attributes of the memory ECC object */ |
| 560 | static struct edac_pci_dev_attribute *edac_pci_attr[] = { |
| 561 | &edac_pci_attr_check_pci_parity, |
| 562 | &edac_pci_attr_panic_on_pci_parity, |
| 563 | &edac_pci_attr_pci_parity_count, |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 564 | NULL, |
| 565 | }; |
| 566 | |
| 567 | /* No memory to release */ |
| 568 | static void edac_pci_release(struct kobject *kobj) |
| 569 | { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 570 | debugf1("%s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 571 | } |
| 572 | |
| 573 | static struct kobj_type ktype_edac_pci = { |
| 574 | .release = edac_pci_release, |
| 575 | .sysfs_ops = &edac_pci_sysfs_ops, |
| 576 | .default_attrs = (struct attribute **) edac_pci_attr, |
| 577 | }; |
| 578 | |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 579 | #endif /* DISABLE_EDAC_SYSFS */ |
| 580 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 581 | /** |
| 582 | * edac_sysfs_pci_setup() |
| 583 | * |
| 584 | */ |
| 585 | static int edac_sysfs_pci_setup(void) |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 586 | #ifdef DISABLE_EDAC_SYSFS |
| 587 | { |
| 588 | return 0; |
| 589 | } |
| 590 | #else |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 591 | { |
| 592 | int err; |
| 593 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 594 | debugf1("%s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 595 | |
| 596 | memset(&edac_pci_kobj, 0, sizeof(edac_pci_kobj)); |
| 597 | |
| 598 | kobject_init(&edac_pci_kobj); |
| 599 | edac_pci_kobj.parent = &edac_class.kset.kobj; |
| 600 | edac_pci_kobj.ktype = &ktype_edac_pci; |
| 601 | |
| 602 | err = kobject_set_name(&edac_pci_kobj, "pci"); |
| 603 | if (!err) { |
| 604 | /* Instanstiate the csrow object */ |
| 605 | /* FIXME: maybe new sysdev_create_subdir() */ |
| 606 | err = kobject_register(&edac_pci_kobj); |
| 607 | if (err) |
| 608 | debugf1("Failed to register '.../edac/pci'\n"); |
| 609 | else |
| 610 | debugf1("Registered '.../edac/pci' kobject\n"); |
| 611 | } |
| 612 | return err; |
| 613 | } |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 614 | #endif /* DISABLE_EDAC_SYSFS */ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 615 | |
| 616 | static void edac_sysfs_pci_teardown(void) |
| 617 | { |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 618 | #ifndef DISABLE_EDAC_SYSFS |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 619 | debugf0("%s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 620 | |
| 621 | kobject_unregister(&edac_pci_kobj); |
| 622 | kobject_put(&edac_pci_kobj); |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 623 | #endif |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 624 | } |
| 625 | |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 626 | #ifndef DISABLE_EDAC_SYSFS |
| 627 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 628 | /* EDAC sysfs CSROW data structures and methods */ |
| 629 | |
| 630 | /* Set of more detailed csrow<id> attribute show/store functions */ |
| 631 | static ssize_t csrow_ch0_dimm_label_show(struct csrow_info *csrow, char *data) |
| 632 | { |
| 633 | ssize_t size = 0; |
| 634 | |
| 635 | if (csrow->nr_channels > 0) { |
| 636 | size = snprintf(data, EDAC_MC_LABEL_LEN,"%s\n", |
| 637 | csrow->channels[0].label); |
| 638 | } |
| 639 | return size; |
| 640 | } |
| 641 | |
| 642 | static ssize_t csrow_ch1_dimm_label_show(struct csrow_info *csrow, char *data) |
| 643 | { |
| 644 | ssize_t size = 0; |
| 645 | |
| 646 | if (csrow->nr_channels > 0) { |
| 647 | size = snprintf(data, EDAC_MC_LABEL_LEN, "%s\n", |
| 648 | csrow->channels[1].label); |
| 649 | } |
| 650 | return size; |
| 651 | } |
| 652 | |
| 653 | static ssize_t csrow_ch0_dimm_label_store(struct csrow_info *csrow, |
| 654 | const char *data, size_t size) |
| 655 | { |
| 656 | ssize_t max_size = 0; |
| 657 | |
| 658 | if (csrow->nr_channels > 0) { |
| 659 | max_size = min((ssize_t)size,(ssize_t)EDAC_MC_LABEL_LEN-1); |
| 660 | strncpy(csrow->channels[0].label, data, max_size); |
| 661 | csrow->channels[0].label[max_size] = '\0'; |
| 662 | } |
| 663 | return size; |
| 664 | } |
| 665 | |
| 666 | static ssize_t csrow_ch1_dimm_label_store(struct csrow_info *csrow, |
| 667 | const char *data, size_t size) |
| 668 | { |
| 669 | ssize_t max_size = 0; |
| 670 | |
| 671 | if (csrow->nr_channels > 1) { |
| 672 | max_size = min((ssize_t)size,(ssize_t)EDAC_MC_LABEL_LEN-1); |
| 673 | strncpy(csrow->channels[1].label, data, max_size); |
| 674 | csrow->channels[1].label[max_size] = '\0'; |
| 675 | } |
| 676 | return max_size; |
| 677 | } |
| 678 | |
| 679 | static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data) |
| 680 | { |
| 681 | return sprintf(data,"%u\n", csrow->ue_count); |
| 682 | } |
| 683 | |
| 684 | static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data) |
| 685 | { |
| 686 | return sprintf(data,"%u\n", csrow->ce_count); |
| 687 | } |
| 688 | |
| 689 | static ssize_t csrow_ch0_ce_count_show(struct csrow_info *csrow, char *data) |
| 690 | { |
| 691 | ssize_t size = 0; |
| 692 | |
| 693 | if (csrow->nr_channels > 0) { |
| 694 | size = sprintf(data,"%u\n", csrow->channels[0].ce_count); |
| 695 | } |
| 696 | return size; |
| 697 | } |
| 698 | |
| 699 | static ssize_t csrow_ch1_ce_count_show(struct csrow_info *csrow, char *data) |
| 700 | { |
| 701 | ssize_t size = 0; |
| 702 | |
| 703 | if (csrow->nr_channels > 1) { |
| 704 | size = sprintf(data,"%u\n", csrow->channels[1].ce_count); |
| 705 | } |
| 706 | return size; |
| 707 | } |
| 708 | |
| 709 | static ssize_t csrow_size_show(struct csrow_info *csrow, char *data) |
| 710 | { |
| 711 | return sprintf(data,"%u\n", PAGES_TO_MiB(csrow->nr_pages)); |
| 712 | } |
| 713 | |
| 714 | static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data) |
| 715 | { |
| 716 | return sprintf(data,"%s\n", mem_types[csrow->mtype]); |
| 717 | } |
| 718 | |
| 719 | static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data) |
| 720 | { |
| 721 | return sprintf(data,"%s\n", dev_types[csrow->dtype]); |
| 722 | } |
| 723 | |
| 724 | static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data) |
| 725 | { |
| 726 | return sprintf(data,"%s\n", edac_caps[csrow->edac_mode]); |
| 727 | } |
| 728 | |
| 729 | struct csrowdev_attribute { |
| 730 | struct attribute attr; |
| 731 | ssize_t (*show)(struct csrow_info *,char *); |
| 732 | ssize_t (*store)(struct csrow_info *, const char *,size_t); |
| 733 | }; |
| 734 | |
| 735 | #define to_csrow(k) container_of(k, struct csrow_info, kobj) |
| 736 | #define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr) |
| 737 | |
| 738 | /* Set of show/store higher level functions for csrow objects */ |
| 739 | static ssize_t csrowdev_show(struct kobject *kobj, struct attribute *attr, |
| 740 | char *buffer) |
| 741 | { |
| 742 | struct csrow_info *csrow = to_csrow(kobj); |
| 743 | struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr); |
| 744 | |
| 745 | if (csrowdev_attr->show) |
| 746 | return csrowdev_attr->show(csrow, buffer); |
| 747 | return -EIO; |
| 748 | } |
| 749 | |
| 750 | static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr, |
| 751 | const char *buffer, size_t count) |
| 752 | { |
| 753 | struct csrow_info *csrow = to_csrow(kobj); |
| 754 | struct csrowdev_attribute * csrowdev_attr = to_csrowdev_attr(attr); |
| 755 | |
| 756 | if (csrowdev_attr->store) |
| 757 | return csrowdev_attr->store(csrow, buffer, count); |
| 758 | return -EIO; |
| 759 | } |
| 760 | |
| 761 | static struct sysfs_ops csrowfs_ops = { |
| 762 | .show = csrowdev_show, |
| 763 | .store = csrowdev_store |
| 764 | }; |
| 765 | |
| 766 | #define CSROWDEV_ATTR(_name,_mode,_show,_store) \ |
| 767 | struct csrowdev_attribute attr_##_name = { \ |
| 768 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 769 | .show = _show, \ |
| 770 | .store = _store, \ |
| 771 | }; |
| 772 | |
| 773 | /* cwrow<id>/attribute files */ |
| 774 | CSROWDEV_ATTR(size_mb,S_IRUGO,csrow_size_show,NULL); |
| 775 | CSROWDEV_ATTR(dev_type,S_IRUGO,csrow_dev_type_show,NULL); |
| 776 | CSROWDEV_ATTR(mem_type,S_IRUGO,csrow_mem_type_show,NULL); |
| 777 | CSROWDEV_ATTR(edac_mode,S_IRUGO,csrow_edac_mode_show,NULL); |
| 778 | CSROWDEV_ATTR(ue_count,S_IRUGO,csrow_ue_count_show,NULL); |
| 779 | CSROWDEV_ATTR(ce_count,S_IRUGO,csrow_ce_count_show,NULL); |
| 780 | CSROWDEV_ATTR(ch0_ce_count,S_IRUGO,csrow_ch0_ce_count_show,NULL); |
| 781 | CSROWDEV_ATTR(ch1_ce_count,S_IRUGO,csrow_ch1_ce_count_show,NULL); |
| 782 | |
| 783 | /* control/attribute files */ |
| 784 | CSROWDEV_ATTR(ch0_dimm_label,S_IRUGO|S_IWUSR, |
| 785 | csrow_ch0_dimm_label_show, |
| 786 | csrow_ch0_dimm_label_store); |
| 787 | CSROWDEV_ATTR(ch1_dimm_label,S_IRUGO|S_IWUSR, |
| 788 | csrow_ch1_dimm_label_show, |
| 789 | csrow_ch1_dimm_label_store); |
| 790 | |
| 791 | |
| 792 | /* Attributes of the CSROW<id> object */ |
| 793 | static struct csrowdev_attribute *csrow_attr[] = { |
| 794 | &attr_dev_type, |
| 795 | &attr_mem_type, |
| 796 | &attr_edac_mode, |
| 797 | &attr_size_mb, |
| 798 | &attr_ue_count, |
| 799 | &attr_ce_count, |
| 800 | &attr_ch0_ce_count, |
| 801 | &attr_ch1_ce_count, |
| 802 | &attr_ch0_dimm_label, |
| 803 | &attr_ch1_dimm_label, |
| 804 | NULL, |
| 805 | }; |
| 806 | |
| 807 | |
| 808 | /* No memory to release */ |
| 809 | static void edac_csrow_instance_release(struct kobject *kobj) |
| 810 | { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 811 | debugf1("%s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 812 | } |
| 813 | |
| 814 | static struct kobj_type ktype_csrow = { |
| 815 | .release = edac_csrow_instance_release, |
| 816 | .sysfs_ops = &csrowfs_ops, |
| 817 | .default_attrs = (struct attribute **) csrow_attr, |
| 818 | }; |
| 819 | |
| 820 | /* Create a CSROW object under specifed edac_mc_device */ |
| 821 | static int edac_create_csrow_object(struct kobject *edac_mci_kobj, |
| 822 | struct csrow_info *csrow, int index ) |
| 823 | { |
| 824 | int err = 0; |
| 825 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 826 | debugf0("%s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 827 | |
| 828 | memset(&csrow->kobj, 0, sizeof(csrow->kobj)); |
| 829 | |
| 830 | /* generate ..../edac/mc/mc<id>/csrow<index> */ |
| 831 | |
| 832 | kobject_init(&csrow->kobj); |
| 833 | csrow->kobj.parent = edac_mci_kobj; |
| 834 | csrow->kobj.ktype = &ktype_csrow; |
| 835 | |
| 836 | /* name this instance of csrow<id> */ |
| 837 | err = kobject_set_name(&csrow->kobj,"csrow%d",index); |
| 838 | if (!err) { |
| 839 | /* Instanstiate the csrow object */ |
| 840 | err = kobject_register(&csrow->kobj); |
| 841 | if (err) |
| 842 | debugf0("Failed to register CSROW%d\n",index); |
| 843 | else |
| 844 | debugf0("Registered CSROW%d\n",index); |
| 845 | } |
| 846 | |
| 847 | return err; |
| 848 | } |
| 849 | |
| 850 | /* sysfs data structures and methods for the MCI kobjects */ |
| 851 | |
| 852 | static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci, |
| 853 | const char *data, size_t count ) |
| 854 | { |
| 855 | int row, chan; |
| 856 | |
| 857 | mci->ue_noinfo_count = 0; |
| 858 | mci->ce_noinfo_count = 0; |
| 859 | mci->ue_count = 0; |
| 860 | mci->ce_count = 0; |
| 861 | for (row = 0; row < mci->nr_csrows; row++) { |
| 862 | struct csrow_info *ri = &mci->csrows[row]; |
| 863 | |
| 864 | ri->ue_count = 0; |
| 865 | ri->ce_count = 0; |
| 866 | for (chan = 0; chan < ri->nr_channels; chan++) |
| 867 | ri->channels[chan].ce_count = 0; |
| 868 | } |
| 869 | mci->start_time = jiffies; |
| 870 | |
| 871 | return count; |
| 872 | } |
| 873 | |
| 874 | static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data) |
| 875 | { |
| 876 | return sprintf(data,"%d\n", mci->ue_count); |
| 877 | } |
| 878 | |
| 879 | static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data) |
| 880 | { |
| 881 | return sprintf(data,"%d\n", mci->ce_count); |
| 882 | } |
| 883 | |
| 884 | static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data) |
| 885 | { |
| 886 | return sprintf(data,"%d\n", mci->ce_noinfo_count); |
| 887 | } |
| 888 | |
| 889 | static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data) |
| 890 | { |
| 891 | return sprintf(data,"%d\n", mci->ue_noinfo_count); |
| 892 | } |
| 893 | |
| 894 | static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data) |
| 895 | { |
| 896 | return sprintf(data,"%ld\n", (jiffies - mci->start_time) / HZ); |
| 897 | } |
| 898 | |
| 899 | static ssize_t mci_mod_name_show(struct mem_ctl_info *mci, char *data) |
| 900 | { |
| 901 | return sprintf(data,"%s %s\n", mci->mod_name, mci->mod_ver); |
| 902 | } |
| 903 | |
| 904 | static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data) |
| 905 | { |
| 906 | return sprintf(data,"%s\n", mci->ctl_name); |
| 907 | } |
| 908 | |
| 909 | static int mci_output_edac_cap(char *buf, unsigned long edac_cap) |
| 910 | { |
| 911 | char *p = buf; |
| 912 | int bit_idx; |
| 913 | |
| 914 | for (bit_idx = 0; bit_idx < 8 * sizeof(edac_cap); bit_idx++) { |
| 915 | if ((edac_cap >> bit_idx) & 0x1) |
| 916 | p += sprintf(p, "%s ", edac_caps[bit_idx]); |
| 917 | } |
| 918 | |
| 919 | return p - buf; |
| 920 | } |
| 921 | |
| 922 | static ssize_t mci_edac_capability_show(struct mem_ctl_info *mci, char *data) |
| 923 | { |
| 924 | char *p = data; |
| 925 | |
| 926 | p += mci_output_edac_cap(p,mci->edac_ctl_cap); |
| 927 | p += sprintf(p, "\n"); |
| 928 | |
| 929 | return p - data; |
| 930 | } |
| 931 | |
| 932 | static ssize_t mci_edac_current_capability_show(struct mem_ctl_info *mci, |
| 933 | char *data) |
| 934 | { |
| 935 | char *p = data; |
| 936 | |
| 937 | p += mci_output_edac_cap(p,mci->edac_cap); |
| 938 | p += sprintf(p, "\n"); |
| 939 | |
| 940 | return p - data; |
| 941 | } |
| 942 | |
| 943 | static int mci_output_mtype_cap(char *buf, unsigned long mtype_cap) |
| 944 | { |
| 945 | char *p = buf; |
| 946 | int bit_idx; |
| 947 | |
| 948 | for (bit_idx = 0; bit_idx < 8 * sizeof(mtype_cap); bit_idx++) { |
| 949 | if ((mtype_cap >> bit_idx) & 0x1) |
| 950 | p += sprintf(p, "%s ", mem_types[bit_idx]); |
| 951 | } |
| 952 | |
| 953 | return p - buf; |
| 954 | } |
| 955 | |
| 956 | static ssize_t mci_supported_mem_type_show(struct mem_ctl_info *mci, char *data) |
| 957 | { |
| 958 | char *p = data; |
| 959 | |
| 960 | p += mci_output_mtype_cap(p,mci->mtype_cap); |
| 961 | p += sprintf(p, "\n"); |
| 962 | |
| 963 | return p - data; |
| 964 | } |
| 965 | |
| 966 | static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data) |
| 967 | { |
| 968 | int total_pages, csrow_idx; |
| 969 | |
| 970 | for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows; |
| 971 | csrow_idx++) { |
| 972 | struct csrow_info *csrow = &mci->csrows[csrow_idx]; |
| 973 | |
| 974 | if (!csrow->nr_pages) |
| 975 | continue; |
| 976 | total_pages += csrow->nr_pages; |
| 977 | } |
| 978 | |
| 979 | return sprintf(data,"%u\n", PAGES_TO_MiB(total_pages)); |
| 980 | } |
| 981 | |
| 982 | struct mcidev_attribute { |
| 983 | struct attribute attr; |
| 984 | ssize_t (*show)(struct mem_ctl_info *,char *); |
| 985 | ssize_t (*store)(struct mem_ctl_info *, const char *,size_t); |
| 986 | }; |
| 987 | |
| 988 | #define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj) |
| 989 | #define to_mcidev_attr(a) container_of(a, struct mcidev_attribute, attr) |
| 990 | |
| 991 | static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr, |
| 992 | char *buffer) |
| 993 | { |
| 994 | struct mem_ctl_info *mem_ctl_info = to_mci(kobj); |
| 995 | struct mcidev_attribute * mcidev_attr = to_mcidev_attr(attr); |
| 996 | |
| 997 | if (mcidev_attr->show) |
| 998 | return mcidev_attr->show(mem_ctl_info, buffer); |
| 999 | return -EIO; |
| 1000 | } |
| 1001 | |
| 1002 | static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr, |
| 1003 | const char *buffer, size_t count) |
| 1004 | { |
| 1005 | struct mem_ctl_info *mem_ctl_info = to_mci(kobj); |
| 1006 | struct mcidev_attribute * mcidev_attr = to_mcidev_attr(attr); |
| 1007 | |
| 1008 | if (mcidev_attr->store) |
| 1009 | return mcidev_attr->store(mem_ctl_info, buffer, count); |
| 1010 | return -EIO; |
| 1011 | } |
| 1012 | |
| 1013 | static struct sysfs_ops mci_ops = { |
| 1014 | .show = mcidev_show, |
| 1015 | .store = mcidev_store |
| 1016 | }; |
| 1017 | |
| 1018 | #define MCIDEV_ATTR(_name,_mode,_show,_store) \ |
| 1019 | struct mcidev_attribute mci_attr_##_name = { \ |
| 1020 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 1021 | .show = _show, \ |
| 1022 | .store = _store, \ |
| 1023 | }; |
| 1024 | |
| 1025 | /* Control file */ |
| 1026 | MCIDEV_ATTR(reset_counters,S_IWUSR,NULL,mci_reset_counters_store); |
| 1027 | |
| 1028 | /* Attribute files */ |
| 1029 | MCIDEV_ATTR(mc_name,S_IRUGO,mci_ctl_name_show,NULL); |
| 1030 | MCIDEV_ATTR(module_name,S_IRUGO,mci_mod_name_show,NULL); |
| 1031 | MCIDEV_ATTR(edac_capability,S_IRUGO,mci_edac_capability_show,NULL); |
| 1032 | MCIDEV_ATTR(size_mb,S_IRUGO,mci_size_mb_show,NULL); |
| 1033 | MCIDEV_ATTR(seconds_since_reset,S_IRUGO,mci_seconds_show,NULL); |
| 1034 | MCIDEV_ATTR(ue_noinfo_count,S_IRUGO,mci_ue_noinfo_show,NULL); |
| 1035 | MCIDEV_ATTR(ce_noinfo_count,S_IRUGO,mci_ce_noinfo_show,NULL); |
| 1036 | MCIDEV_ATTR(ue_count,S_IRUGO,mci_ue_count_show,NULL); |
| 1037 | MCIDEV_ATTR(ce_count,S_IRUGO,mci_ce_count_show,NULL); |
| 1038 | MCIDEV_ATTR(edac_current_capability,S_IRUGO, |
| 1039 | mci_edac_current_capability_show,NULL); |
| 1040 | MCIDEV_ATTR(supported_mem_type,S_IRUGO, |
| 1041 | mci_supported_mem_type_show,NULL); |
| 1042 | |
| 1043 | |
| 1044 | static struct mcidev_attribute *mci_attr[] = { |
| 1045 | &mci_attr_reset_counters, |
| 1046 | &mci_attr_module_name, |
| 1047 | &mci_attr_mc_name, |
| 1048 | &mci_attr_edac_capability, |
| 1049 | &mci_attr_edac_current_capability, |
| 1050 | &mci_attr_supported_mem_type, |
| 1051 | &mci_attr_size_mb, |
| 1052 | &mci_attr_seconds_since_reset, |
| 1053 | &mci_attr_ue_noinfo_count, |
| 1054 | &mci_attr_ce_noinfo_count, |
| 1055 | &mci_attr_ue_count, |
| 1056 | &mci_attr_ce_count, |
| 1057 | NULL |
| 1058 | }; |
| 1059 | |
| 1060 | |
| 1061 | /* |
| 1062 | * Release of a MC controlling instance |
| 1063 | */ |
| 1064 | static void edac_mci_instance_release(struct kobject *kobj) |
| 1065 | { |
| 1066 | struct mem_ctl_info *mci; |
| 1067 | mci = container_of(kobj,struct mem_ctl_info,edac_mci_kobj); |
| 1068 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1069 | debugf0("%s() idx=%d calling kfree\n", __func__, mci->mc_idx); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1070 | |
| 1071 | kfree(mci); |
| 1072 | } |
| 1073 | |
| 1074 | static struct kobj_type ktype_mci = { |
| 1075 | .release = edac_mci_instance_release, |
| 1076 | .sysfs_ops = &mci_ops, |
| 1077 | .default_attrs = (struct attribute **) mci_attr, |
| 1078 | }; |
| 1079 | |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 1080 | #endif /* DISABLE_EDAC_SYSFS */ |
| 1081 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1082 | #define EDAC_DEVICE_SYMLINK "device" |
| 1083 | |
| 1084 | /* |
| 1085 | * Create a new Memory Controller kobject instance, |
| 1086 | * mc<id> under the 'mc' directory |
| 1087 | * |
| 1088 | * Return: |
| 1089 | * 0 Success |
| 1090 | * !0 Failure |
| 1091 | */ |
| 1092 | static int edac_create_sysfs_mci_device(struct mem_ctl_info *mci) |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 1093 | #ifdef DISABLE_EDAC_SYSFS |
| 1094 | { |
| 1095 | return 0; |
| 1096 | } |
| 1097 | #else |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1098 | { |
| 1099 | int i; |
| 1100 | int err; |
| 1101 | struct csrow_info *csrow; |
| 1102 | struct kobject *edac_mci_kobj=&mci->edac_mci_kobj; |
| 1103 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1104 | debugf0("%s() idx=%d\n", __func__, mci->mc_idx); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1105 | |
| 1106 | memset(edac_mci_kobj, 0, sizeof(*edac_mci_kobj)); |
| 1107 | kobject_init(edac_mci_kobj); |
| 1108 | |
| 1109 | /* set the name of the mc<id> object */ |
| 1110 | err = kobject_set_name(edac_mci_kobj,"mc%d",mci->mc_idx); |
| 1111 | if (err) |
| 1112 | return err; |
| 1113 | |
| 1114 | /* link to our parent the '..../edac/mc' object */ |
| 1115 | edac_mci_kobj->parent = &edac_memctrl_kobj; |
| 1116 | edac_mci_kobj->ktype = &ktype_mci; |
| 1117 | |
| 1118 | /* register the mc<id> kobject */ |
| 1119 | err = kobject_register(edac_mci_kobj); |
| 1120 | if (err) |
| 1121 | return err; |
| 1122 | |
| 1123 | /* create a symlink for the device */ |
| 1124 | err = sysfs_create_link(edac_mci_kobj, &mci->pdev->dev.kobj, |
| 1125 | EDAC_DEVICE_SYMLINK); |
| 1126 | if (err) { |
| 1127 | kobject_unregister(edac_mci_kobj); |
| 1128 | return err; |
| 1129 | } |
| 1130 | |
| 1131 | /* Make directories for each CSROW object |
| 1132 | * under the mc<id> kobject |
| 1133 | */ |
| 1134 | for (i = 0; i < mci->nr_csrows; i++) { |
| 1135 | |
| 1136 | csrow = &mci->csrows[i]; |
| 1137 | |
| 1138 | /* Only expose populated CSROWs */ |
| 1139 | if (csrow->nr_pages > 0) { |
| 1140 | err = edac_create_csrow_object(edac_mci_kobj,csrow,i); |
| 1141 | if (err) |
| 1142 | goto fail; |
| 1143 | } |
| 1144 | } |
| 1145 | |
| 1146 | /* Mark this MCI instance as having sysfs entries */ |
| 1147 | mci->sysfs_active = MCI_SYSFS_ACTIVE; |
| 1148 | |
| 1149 | return 0; |
| 1150 | |
| 1151 | |
| 1152 | /* CSROW error: backout what has already been registered, */ |
| 1153 | fail: |
| 1154 | for ( i--; i >= 0; i--) { |
| 1155 | if (csrow->nr_pages > 0) { |
| 1156 | kobject_unregister(&mci->csrows[i].kobj); |
| 1157 | kobject_put(&mci->csrows[i].kobj); |
| 1158 | } |
| 1159 | } |
| 1160 | |
| 1161 | kobject_unregister(edac_mci_kobj); |
| 1162 | kobject_put(edac_mci_kobj); |
| 1163 | |
| 1164 | return err; |
| 1165 | } |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 1166 | #endif /* DISABLE_EDAC_SYSFS */ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1167 | |
| 1168 | /* |
| 1169 | * remove a Memory Controller instance |
| 1170 | */ |
| 1171 | static void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci) |
| 1172 | { |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 1173 | #ifndef DISABLE_EDAC_SYSFS |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1174 | int i; |
| 1175 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1176 | debugf0("%s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1177 | |
| 1178 | /* remove all csrow kobjects */ |
| 1179 | for (i = 0; i < mci->nr_csrows; i++) { |
| 1180 | if (mci->csrows[i].nr_pages > 0) { |
| 1181 | kobject_unregister(&mci->csrows[i].kobj); |
| 1182 | kobject_put(&mci->csrows[i].kobj); |
| 1183 | } |
| 1184 | } |
| 1185 | |
| 1186 | sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK); |
| 1187 | |
| 1188 | kobject_unregister(&mci->edac_mci_kobj); |
| 1189 | kobject_put(&mci->edac_mci_kobj); |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 1190 | #endif /* DISABLE_EDAC_SYSFS */ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1191 | } |
| 1192 | |
| 1193 | /* END OF sysfs data and methods */ |
| 1194 | |
| 1195 | #ifdef CONFIG_EDAC_DEBUG |
| 1196 | |
| 1197 | EXPORT_SYMBOL(edac_mc_dump_channel); |
| 1198 | |
| 1199 | void edac_mc_dump_channel(struct channel_info *chan) |
| 1200 | { |
| 1201 | debugf4("\tchannel = %p\n", chan); |
| 1202 | debugf4("\tchannel->chan_idx = %d\n", chan->chan_idx); |
| 1203 | debugf4("\tchannel->ce_count = %d\n", chan->ce_count); |
| 1204 | debugf4("\tchannel->label = '%s'\n", chan->label); |
| 1205 | debugf4("\tchannel->csrow = %p\n\n", chan->csrow); |
| 1206 | } |
| 1207 | |
| 1208 | |
| 1209 | EXPORT_SYMBOL(edac_mc_dump_csrow); |
| 1210 | |
| 1211 | void edac_mc_dump_csrow(struct csrow_info *csrow) |
| 1212 | { |
| 1213 | debugf4("\tcsrow = %p\n", csrow); |
| 1214 | debugf4("\tcsrow->csrow_idx = %d\n", csrow->csrow_idx); |
| 1215 | debugf4("\tcsrow->first_page = 0x%lx\n", |
| 1216 | csrow->first_page); |
| 1217 | debugf4("\tcsrow->last_page = 0x%lx\n", csrow->last_page); |
| 1218 | debugf4("\tcsrow->page_mask = 0x%lx\n", csrow->page_mask); |
| 1219 | debugf4("\tcsrow->nr_pages = 0x%x\n", csrow->nr_pages); |
| 1220 | debugf4("\tcsrow->nr_channels = %d\n", |
| 1221 | csrow->nr_channels); |
| 1222 | debugf4("\tcsrow->channels = %p\n", csrow->channels); |
| 1223 | debugf4("\tcsrow->mci = %p\n\n", csrow->mci); |
| 1224 | } |
| 1225 | |
| 1226 | |
| 1227 | EXPORT_SYMBOL(edac_mc_dump_mci); |
| 1228 | |
| 1229 | void edac_mc_dump_mci(struct mem_ctl_info *mci) |
| 1230 | { |
| 1231 | debugf3("\tmci = %p\n", mci); |
| 1232 | debugf3("\tmci->mtype_cap = %lx\n", mci->mtype_cap); |
| 1233 | debugf3("\tmci->edac_ctl_cap = %lx\n", mci->edac_ctl_cap); |
| 1234 | debugf3("\tmci->edac_cap = %lx\n", mci->edac_cap); |
| 1235 | debugf4("\tmci->edac_check = %p\n", mci->edac_check); |
| 1236 | debugf3("\tmci->nr_csrows = %d, csrows = %p\n", |
| 1237 | mci->nr_csrows, mci->csrows); |
| 1238 | debugf3("\tpdev = %p\n", mci->pdev); |
| 1239 | debugf3("\tmod_name:ctl_name = %s:%s\n", |
| 1240 | mci->mod_name, mci->ctl_name); |
| 1241 | debugf3("\tpvt_info = %p\n\n", mci->pvt_info); |
| 1242 | } |
| 1243 | |
| 1244 | |
| 1245 | #endif /* CONFIG_EDAC_DEBUG */ |
| 1246 | |
| 1247 | /* 'ptr' points to a possibly unaligned item X such that sizeof(X) is 'size'. |
| 1248 | * Adjust 'ptr' so that its alignment is at least as stringent as what the |
| 1249 | * compiler would provide for X and return the aligned result. |
| 1250 | * |
| 1251 | * If 'size' is a constant, the compiler will optimize this whole function |
| 1252 | * down to either a no-op or the addition of a constant to the value of 'ptr'. |
| 1253 | */ |
| 1254 | static inline char * align_ptr (void *ptr, unsigned size) |
| 1255 | { |
| 1256 | unsigned align, r; |
| 1257 | |
| 1258 | /* Here we assume that the alignment of a "long long" is the most |
| 1259 | * stringent alignment that the compiler will ever provide by default. |
| 1260 | * As far as I know, this is a reasonable assumption. |
| 1261 | */ |
| 1262 | if (size > sizeof(long)) |
| 1263 | align = sizeof(long long); |
| 1264 | else if (size > sizeof(int)) |
| 1265 | align = sizeof(long); |
| 1266 | else if (size > sizeof(short)) |
| 1267 | align = sizeof(int); |
| 1268 | else if (size > sizeof(char)) |
| 1269 | align = sizeof(short); |
| 1270 | else |
| 1271 | return (char *) ptr; |
| 1272 | |
| 1273 | r = size % align; |
| 1274 | |
| 1275 | if (r == 0) |
| 1276 | return (char *) ptr; |
| 1277 | |
| 1278 | return (char *) (((unsigned long) ptr) + align - r); |
| 1279 | } |
| 1280 | |
| 1281 | |
| 1282 | EXPORT_SYMBOL(edac_mc_alloc); |
| 1283 | |
| 1284 | /** |
| 1285 | * edac_mc_alloc: Allocate a struct mem_ctl_info structure |
| 1286 | * @size_pvt: size of private storage needed |
| 1287 | * @nr_csrows: Number of CWROWS needed for this MC |
| 1288 | * @nr_chans: Number of channels for the MC |
| 1289 | * |
| 1290 | * Everything is kmalloc'ed as one big chunk - more efficient. |
| 1291 | * Only can be used if all structures have the same lifetime - otherwise |
| 1292 | * you have to allocate and initialize your own structures. |
| 1293 | * |
| 1294 | * Use edac_mc_free() to free mc structures allocated by this function. |
| 1295 | * |
| 1296 | * Returns: |
| 1297 | * NULL allocation failed |
| 1298 | * struct mem_ctl_info pointer |
| 1299 | */ |
| 1300 | struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows, |
| 1301 | unsigned nr_chans) |
| 1302 | { |
| 1303 | struct mem_ctl_info *mci; |
| 1304 | struct csrow_info *csi, *csrow; |
| 1305 | struct channel_info *chi, *chp, *chan; |
| 1306 | void *pvt; |
| 1307 | unsigned size; |
| 1308 | int row, chn; |
| 1309 | |
| 1310 | /* Figure out the offsets of the various items from the start of an mc |
| 1311 | * structure. We want the alignment of each item to be at least as |
| 1312 | * stringent as what the compiler would provide if we could simply |
| 1313 | * hardcode everything into a single struct. |
| 1314 | */ |
| 1315 | mci = (struct mem_ctl_info *) 0; |
| 1316 | csi = (struct csrow_info *)align_ptr(&mci[1], sizeof(*csi)); |
| 1317 | chi = (struct channel_info *) |
| 1318 | align_ptr(&csi[nr_csrows], sizeof(*chi)); |
| 1319 | pvt = align_ptr(&chi[nr_chans * nr_csrows], sz_pvt); |
| 1320 | size = ((unsigned long) pvt) + sz_pvt; |
| 1321 | |
| 1322 | if ((mci = kmalloc(size, GFP_KERNEL)) == NULL) |
| 1323 | return NULL; |
| 1324 | |
| 1325 | /* Adjust pointers so they point within the memory we just allocated |
| 1326 | * rather than an imaginary chunk of memory located at address 0. |
| 1327 | */ |
| 1328 | csi = (struct csrow_info *) (((char *) mci) + ((unsigned long) csi)); |
| 1329 | chi = (struct channel_info *) (((char *) mci) + ((unsigned long) chi)); |
| 1330 | pvt = sz_pvt ? (((char *) mci) + ((unsigned long) pvt)) : NULL; |
| 1331 | |
| 1332 | memset(mci, 0, size); /* clear all fields */ |
| 1333 | |
| 1334 | mci->csrows = csi; |
| 1335 | mci->pvt_info = pvt; |
| 1336 | mci->nr_csrows = nr_csrows; |
| 1337 | |
| 1338 | for (row = 0; row < nr_csrows; row++) { |
| 1339 | csrow = &csi[row]; |
| 1340 | csrow->csrow_idx = row; |
| 1341 | csrow->mci = mci; |
| 1342 | csrow->nr_channels = nr_chans; |
| 1343 | chp = &chi[row * nr_chans]; |
| 1344 | csrow->channels = chp; |
| 1345 | |
| 1346 | for (chn = 0; chn < nr_chans; chn++) { |
| 1347 | chan = &chp[chn]; |
| 1348 | chan->chan_idx = chn; |
| 1349 | chan->csrow = csrow; |
| 1350 | } |
| 1351 | } |
| 1352 | |
| 1353 | return mci; |
| 1354 | } |
| 1355 | |
| 1356 | |
| 1357 | EXPORT_SYMBOL(edac_mc_free); |
| 1358 | |
| 1359 | /** |
| 1360 | * edac_mc_free: Free a previously allocated 'mci' structure |
| 1361 | * @mci: pointer to a struct mem_ctl_info structure |
| 1362 | * |
| 1363 | * Free up a previously allocated mci structure |
| 1364 | * A MCI structure can be in 2 states after being allocated |
| 1365 | * by edac_mc_alloc(). |
| 1366 | * 1) Allocated in a MC driver's probe, but not yet committed |
| 1367 | * 2) Allocated and committed, by a call to edac_mc_add_mc() |
| 1368 | * edac_mc_add_mc() is the function that adds the sysfs entries |
| 1369 | * thus, this free function must determine which state the 'mci' |
| 1370 | * structure is in, then either free it directly or |
| 1371 | * perform kobject cleanup by calling edac_remove_sysfs_mci_device(). |
| 1372 | * |
| 1373 | * VOID Return |
| 1374 | */ |
| 1375 | void edac_mc_free(struct mem_ctl_info *mci) |
| 1376 | { |
| 1377 | /* only if sysfs entries for this mci instance exist |
| 1378 | * do we remove them and defer the actual kfree via |
| 1379 | * the kobject 'release()' callback. |
| 1380 | * |
| 1381 | * Otherwise, do a straight kfree now. |
| 1382 | */ |
| 1383 | if (mci->sysfs_active == MCI_SYSFS_ACTIVE) |
| 1384 | edac_remove_sysfs_mci_device(mci); |
| 1385 | else |
| 1386 | kfree(mci); |
| 1387 | } |
| 1388 | |
| 1389 | |
| 1390 | |
| 1391 | EXPORT_SYMBOL(edac_mc_find_mci_by_pdev); |
| 1392 | |
| 1393 | struct mem_ctl_info *edac_mc_find_mci_by_pdev(struct pci_dev *pdev) |
| 1394 | { |
| 1395 | struct mem_ctl_info *mci; |
| 1396 | struct list_head *item; |
| 1397 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1398 | debugf3("%s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1399 | |
| 1400 | list_for_each(item, &mc_devices) { |
| 1401 | mci = list_entry(item, struct mem_ctl_info, link); |
| 1402 | |
| 1403 | if (mci->pdev == pdev) |
| 1404 | return mci; |
| 1405 | } |
| 1406 | |
| 1407 | return NULL; |
| 1408 | } |
| 1409 | |
| 1410 | static int add_mc_to_global_list (struct mem_ctl_info *mci) |
| 1411 | { |
| 1412 | struct list_head *item, *insert_before; |
| 1413 | struct mem_ctl_info *p; |
| 1414 | int i; |
| 1415 | |
| 1416 | if (list_empty(&mc_devices)) { |
| 1417 | mci->mc_idx = 0; |
| 1418 | insert_before = &mc_devices; |
| 1419 | } else { |
| 1420 | if (edac_mc_find_mci_by_pdev(mci->pdev)) { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1421 | edac_printk(KERN_WARNING, EDAC_MC, |
| 1422 | "%s (%s) %s %s already assigned %d\n", |
| 1423 | mci->pdev->dev.bus_id, |
| 1424 | pci_name(mci->pdev), mci->mod_name, |
| 1425 | mci->ctl_name, mci->mc_idx); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1426 | return 1; |
| 1427 | } |
| 1428 | |
| 1429 | insert_before = NULL; |
| 1430 | i = 0; |
| 1431 | |
| 1432 | list_for_each(item, &mc_devices) { |
| 1433 | p = list_entry(item, struct mem_ctl_info, link); |
| 1434 | |
| 1435 | if (p->mc_idx != i) { |
| 1436 | insert_before = item; |
| 1437 | break; |
| 1438 | } |
| 1439 | |
| 1440 | i++; |
| 1441 | } |
| 1442 | |
| 1443 | mci->mc_idx = i; |
| 1444 | |
| 1445 | if (insert_before == NULL) |
| 1446 | insert_before = &mc_devices; |
| 1447 | } |
| 1448 | |
| 1449 | list_add_tail_rcu(&mci->link, insert_before); |
| 1450 | return 0; |
| 1451 | } |
| 1452 | |
| 1453 | |
| 1454 | |
| 1455 | EXPORT_SYMBOL(edac_mc_add_mc); |
| 1456 | |
| 1457 | /** |
| 1458 | * edac_mc_add_mc: Insert the 'mci' structure into the mci global list |
| 1459 | * @mci: pointer to the mci structure to be added to the list |
| 1460 | * |
| 1461 | * Return: |
| 1462 | * 0 Success |
| 1463 | * !0 Failure |
| 1464 | */ |
| 1465 | |
| 1466 | /* FIXME - should a warning be printed if no error detection? correction? */ |
| 1467 | int edac_mc_add_mc(struct mem_ctl_info *mci) |
| 1468 | { |
| 1469 | int rc = 1; |
| 1470 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1471 | debugf0("%s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1472 | #ifdef CONFIG_EDAC_DEBUG |
| 1473 | if (edac_debug_level >= 3) |
| 1474 | edac_mc_dump_mci(mci); |
| 1475 | if (edac_debug_level >= 4) { |
| 1476 | int i; |
| 1477 | |
| 1478 | for (i = 0; i < mci->nr_csrows; i++) { |
| 1479 | int j; |
| 1480 | edac_mc_dump_csrow(&mci->csrows[i]); |
| 1481 | for (j = 0; j < mci->csrows[i].nr_channels; j++) |
| 1482 | edac_mc_dump_channel(&mci->csrows[i]. |
| 1483 | channels[j]); |
| 1484 | } |
| 1485 | } |
| 1486 | #endif |
| 1487 | down(&mem_ctls_mutex); |
| 1488 | |
| 1489 | if (add_mc_to_global_list(mci)) |
| 1490 | goto finish; |
| 1491 | |
| 1492 | /* set load time so that error rate can be tracked */ |
| 1493 | mci->start_time = jiffies; |
| 1494 | |
| 1495 | if (edac_create_sysfs_mci_device(mci)) { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1496 | edac_mc_printk(mci, KERN_WARNING, |
| 1497 | "failed to create sysfs device\n"); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1498 | /* FIXME - should there be an error code and unwind? */ |
| 1499 | goto finish; |
| 1500 | } |
| 1501 | |
| 1502 | /* Report action taken */ |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1503 | edac_mc_printk(mci, KERN_INFO, "Giving out device to %s %s: PCI %s\n", |
| 1504 | mci->mod_name, mci->ctl_name, pci_name(mci->pdev)); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1505 | |
| 1506 | rc = 0; |
| 1507 | |
| 1508 | finish: |
| 1509 | up(&mem_ctls_mutex); |
| 1510 | return rc; |
| 1511 | } |
| 1512 | |
| 1513 | |
| 1514 | |
| 1515 | static void complete_mc_list_del (struct rcu_head *head) |
| 1516 | { |
| 1517 | struct mem_ctl_info *mci; |
| 1518 | |
| 1519 | mci = container_of(head, struct mem_ctl_info, rcu); |
| 1520 | INIT_LIST_HEAD(&mci->link); |
| 1521 | complete(&mci->complete); |
| 1522 | } |
| 1523 | |
| 1524 | static void del_mc_from_global_list (struct mem_ctl_info *mci) |
| 1525 | { |
| 1526 | list_del_rcu(&mci->link); |
| 1527 | init_completion(&mci->complete); |
| 1528 | call_rcu(&mci->rcu, complete_mc_list_del); |
| 1529 | wait_for_completion(&mci->complete); |
| 1530 | } |
| 1531 | |
| 1532 | EXPORT_SYMBOL(edac_mc_del_mc); |
| 1533 | |
| 1534 | /** |
| 1535 | * edac_mc_del_mc: Remove the specified mci structure from global list |
| 1536 | * @mci: Pointer to struct mem_ctl_info structure |
| 1537 | * |
| 1538 | * Returns: |
| 1539 | * 0 Success |
| 1540 | * 1 Failure |
| 1541 | */ |
| 1542 | int edac_mc_del_mc(struct mem_ctl_info *mci) |
| 1543 | { |
| 1544 | int rc = 1; |
| 1545 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1546 | debugf0("MC%d: %s()\n", mci->mc_idx, __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1547 | down(&mem_ctls_mutex); |
| 1548 | del_mc_from_global_list(mci); |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1549 | edac_printk(KERN_INFO, EDAC_MC, |
| 1550 | "Removed device %d for %s %s: PCI %s\n", mci->mc_idx, |
| 1551 | mci->mod_name, mci->ctl_name, pci_name(mci->pdev)); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1552 | rc = 0; |
| 1553 | up(&mem_ctls_mutex); |
| 1554 | |
| 1555 | return rc; |
| 1556 | } |
| 1557 | |
| 1558 | |
| 1559 | EXPORT_SYMBOL(edac_mc_scrub_block); |
| 1560 | |
| 1561 | void edac_mc_scrub_block(unsigned long page, unsigned long offset, |
| 1562 | u32 size) |
| 1563 | { |
| 1564 | struct page *pg; |
| 1565 | void *virt_addr; |
| 1566 | unsigned long flags = 0; |
| 1567 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1568 | debugf3("%s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1569 | |
| 1570 | /* ECC error page was not in our memory. Ignore it. */ |
| 1571 | if(!pfn_valid(page)) |
| 1572 | return; |
| 1573 | |
| 1574 | /* Find the actual page structure then map it and fix */ |
| 1575 | pg = pfn_to_page(page); |
| 1576 | |
| 1577 | if (PageHighMem(pg)) |
| 1578 | local_irq_save(flags); |
| 1579 | |
| 1580 | virt_addr = kmap_atomic(pg, KM_BOUNCE_READ); |
| 1581 | |
| 1582 | /* Perform architecture specific atomic scrub operation */ |
| 1583 | atomic_scrub(virt_addr + offset, size); |
| 1584 | |
| 1585 | /* Unmap and complete */ |
| 1586 | kunmap_atomic(virt_addr, KM_BOUNCE_READ); |
| 1587 | |
| 1588 | if (PageHighMem(pg)) |
| 1589 | local_irq_restore(flags); |
| 1590 | } |
| 1591 | |
| 1592 | |
| 1593 | /* FIXME - should return -1 */ |
| 1594 | EXPORT_SYMBOL(edac_mc_find_csrow_by_page); |
| 1595 | |
| 1596 | int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci, |
| 1597 | unsigned long page) |
| 1598 | { |
| 1599 | struct csrow_info *csrows = mci->csrows; |
| 1600 | int row, i; |
| 1601 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1602 | debugf1("MC%d: %s(): 0x%lx\n", mci->mc_idx, __func__, page); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1603 | row = -1; |
| 1604 | |
| 1605 | for (i = 0; i < mci->nr_csrows; i++) { |
| 1606 | struct csrow_info *csrow = &csrows[i]; |
| 1607 | |
| 1608 | if (csrow->nr_pages == 0) |
| 1609 | continue; |
| 1610 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1611 | debugf3("MC%d: %s(): first(0x%lx) page(0x%lx) last(0x%lx) " |
| 1612 | "mask(0x%lx)\n", mci->mc_idx, __func__, |
| 1613 | csrow->first_page, page, csrow->last_page, |
| 1614 | csrow->page_mask); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1615 | |
| 1616 | if ((page >= csrow->first_page) && |
| 1617 | (page <= csrow->last_page) && |
| 1618 | ((page & csrow->page_mask) == |
| 1619 | (csrow->first_page & csrow->page_mask))) { |
| 1620 | row = i; |
| 1621 | break; |
| 1622 | } |
| 1623 | } |
| 1624 | |
| 1625 | if (row == -1) |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1626 | edac_mc_printk(mci, KERN_ERR, |
| 1627 | "could not look up page error address %lx\n", |
| 1628 | (unsigned long) page); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1629 | |
| 1630 | return row; |
| 1631 | } |
| 1632 | |
| 1633 | |
| 1634 | EXPORT_SYMBOL(edac_mc_handle_ce); |
| 1635 | |
| 1636 | /* FIXME - setable log (warning/emerg) levels */ |
| 1637 | /* FIXME - integrate with evlog: http://evlog.sourceforge.net/ */ |
| 1638 | void edac_mc_handle_ce(struct mem_ctl_info *mci, |
| 1639 | unsigned long page_frame_number, |
| 1640 | unsigned long offset_in_page, |
| 1641 | unsigned long syndrome, int row, int channel, |
| 1642 | const char *msg) |
| 1643 | { |
| 1644 | unsigned long remapped_page; |
| 1645 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1646 | debugf3("MC%d: %s()\n", mci->mc_idx, __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1647 | |
| 1648 | /* FIXME - maybe make panic on INTERNAL ERROR an option */ |
| 1649 | if (row >= mci->nr_csrows || row < 0) { |
| 1650 | /* something is wrong */ |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1651 | edac_mc_printk(mci, KERN_ERR, |
| 1652 | "INTERNAL ERROR: row out of range " |
| 1653 | "(%d >= %d)\n", row, mci->nr_csrows); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1654 | edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); |
| 1655 | return; |
| 1656 | } |
| 1657 | if (channel >= mci->csrows[row].nr_channels || channel < 0) { |
| 1658 | /* something is wrong */ |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1659 | edac_mc_printk(mci, KERN_ERR, |
| 1660 | "INTERNAL ERROR: channel out of range " |
| 1661 | "(%d >= %d)\n", channel, |
| 1662 | mci->csrows[row].nr_channels); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1663 | edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); |
| 1664 | return; |
| 1665 | } |
| 1666 | |
| 1667 | if (log_ce) |
| 1668 | /* FIXME - put in DIMM location */ |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1669 | edac_mc_printk(mci, KERN_WARNING, |
| 1670 | "CE page 0x%lx, offset 0x%lx, grain %d, syndrome " |
| 1671 | "0x%lx, row %d, channel %d, label \"%s\": %s\n", |
| 1672 | page_frame_number, offset_in_page, |
| 1673 | mci->csrows[row].grain, syndrome, row, channel, |
| 1674 | mci->csrows[row].channels[channel].label, msg); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1675 | |
| 1676 | mci->ce_count++; |
| 1677 | mci->csrows[row].ce_count++; |
| 1678 | mci->csrows[row].channels[channel].ce_count++; |
| 1679 | |
| 1680 | if (mci->scrub_mode & SCRUB_SW_SRC) { |
| 1681 | /* |
| 1682 | * Some MC's can remap memory so that it is still available |
| 1683 | * at a different address when PCI devices map into memory. |
| 1684 | * MC's that can't do this lose the memory where PCI devices |
| 1685 | * are mapped. This mapping is MC dependant and so we call |
| 1686 | * back into the MC driver for it to map the MC page to |
| 1687 | * a physical (CPU) page which can then be mapped to a virtual |
| 1688 | * page - which can then be scrubbed. |
| 1689 | */ |
| 1690 | remapped_page = mci->ctl_page_to_phys ? |
| 1691 | mci->ctl_page_to_phys(mci, page_frame_number) : |
| 1692 | page_frame_number; |
| 1693 | |
| 1694 | edac_mc_scrub_block(remapped_page, offset_in_page, |
| 1695 | mci->csrows[row].grain); |
| 1696 | } |
| 1697 | } |
| 1698 | |
| 1699 | |
| 1700 | EXPORT_SYMBOL(edac_mc_handle_ce_no_info); |
| 1701 | |
| 1702 | void edac_mc_handle_ce_no_info(struct mem_ctl_info *mci, |
| 1703 | const char *msg) |
| 1704 | { |
| 1705 | if (log_ce) |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1706 | edac_mc_printk(mci, KERN_WARNING, |
| 1707 | "CE - no information available: %s\n", msg); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1708 | mci->ce_noinfo_count++; |
| 1709 | mci->ce_count++; |
| 1710 | } |
| 1711 | |
| 1712 | |
| 1713 | EXPORT_SYMBOL(edac_mc_handle_ue); |
| 1714 | |
| 1715 | void edac_mc_handle_ue(struct mem_ctl_info *mci, |
| 1716 | unsigned long page_frame_number, |
| 1717 | unsigned long offset_in_page, int row, |
| 1718 | const char *msg) |
| 1719 | { |
| 1720 | int len = EDAC_MC_LABEL_LEN * 4; |
| 1721 | char labels[len + 1]; |
| 1722 | char *pos = labels; |
| 1723 | int chan; |
| 1724 | int chars; |
| 1725 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1726 | debugf3("MC%d: %s()\n", mci->mc_idx, __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1727 | |
| 1728 | /* FIXME - maybe make panic on INTERNAL ERROR an option */ |
| 1729 | if (row >= mci->nr_csrows || row < 0) { |
| 1730 | /* something is wrong */ |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1731 | edac_mc_printk(mci, KERN_ERR, |
| 1732 | "INTERNAL ERROR: row out of range " |
| 1733 | "(%d >= %d)\n", row, mci->nr_csrows); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1734 | edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR"); |
| 1735 | return; |
| 1736 | } |
| 1737 | |
| 1738 | chars = snprintf(pos, len + 1, "%s", |
| 1739 | mci->csrows[row].channels[0].label); |
| 1740 | len -= chars; |
| 1741 | pos += chars; |
| 1742 | for (chan = 1; (chan < mci->csrows[row].nr_channels) && (len > 0); |
| 1743 | chan++) { |
| 1744 | chars = snprintf(pos, len + 1, ":%s", |
| 1745 | mci->csrows[row].channels[chan].label); |
| 1746 | len -= chars; |
| 1747 | pos += chars; |
| 1748 | } |
| 1749 | |
| 1750 | if (log_ue) |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1751 | edac_mc_printk(mci, KERN_EMERG, |
| 1752 | "UE page 0x%lx, offset 0x%lx, grain %d, row %d, " |
| 1753 | "labels \"%s\": %s\n", page_frame_number, |
| 1754 | offset_in_page, mci->csrows[row].grain, row, labels, |
| 1755 | msg); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1756 | |
| 1757 | if (panic_on_ue) |
| 1758 | panic |
| 1759 | ("EDAC MC%d: UE page 0x%lx, offset 0x%lx, grain %d, row %d," |
| 1760 | " labels \"%s\": %s\n", mci->mc_idx, |
| 1761 | page_frame_number, offset_in_page, |
| 1762 | mci->csrows[row].grain, row, labels, msg); |
| 1763 | |
| 1764 | mci->ue_count++; |
| 1765 | mci->csrows[row].ue_count++; |
| 1766 | } |
| 1767 | |
| 1768 | |
| 1769 | EXPORT_SYMBOL(edac_mc_handle_ue_no_info); |
| 1770 | |
| 1771 | void edac_mc_handle_ue_no_info(struct mem_ctl_info *mci, |
| 1772 | const char *msg) |
| 1773 | { |
| 1774 | if (panic_on_ue) |
| 1775 | panic("EDAC MC%d: Uncorrected Error", mci->mc_idx); |
| 1776 | |
| 1777 | if (log_ue) |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1778 | edac_mc_printk(mci, KERN_WARNING, |
| 1779 | "UE - no information available: %s\n", msg); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1780 | mci->ue_noinfo_count++; |
| 1781 | mci->ue_count++; |
| 1782 | } |
| 1783 | |
| 1784 | |
| 1785 | #ifdef CONFIG_PCI |
| 1786 | |
| 1787 | static u16 get_pci_parity_status(struct pci_dev *dev, int secondary) |
| 1788 | { |
| 1789 | int where; |
| 1790 | u16 status; |
| 1791 | |
| 1792 | where = secondary ? PCI_SEC_STATUS : PCI_STATUS; |
| 1793 | pci_read_config_word(dev, where, &status); |
| 1794 | |
| 1795 | /* If we get back 0xFFFF then we must suspect that the card has been pulled but |
| 1796 | the Linux PCI layer has not yet finished cleaning up. We don't want to report |
| 1797 | on such devices */ |
| 1798 | |
| 1799 | if (status == 0xFFFF) { |
| 1800 | u32 sanity; |
| 1801 | pci_read_config_dword(dev, 0, &sanity); |
| 1802 | if (sanity == 0xFFFFFFFF) |
| 1803 | return 0; |
| 1804 | } |
| 1805 | status &= PCI_STATUS_DETECTED_PARITY | PCI_STATUS_SIG_SYSTEM_ERROR | |
| 1806 | PCI_STATUS_PARITY; |
| 1807 | |
| 1808 | if (status) |
| 1809 | /* reset only the bits we are interested in */ |
| 1810 | pci_write_config_word(dev, where, status); |
| 1811 | |
| 1812 | return status; |
| 1813 | } |
| 1814 | |
| 1815 | typedef void (*pci_parity_check_fn_t) (struct pci_dev *dev); |
| 1816 | |
| 1817 | /* Clear any PCI parity errors logged by this device. */ |
| 1818 | static void edac_pci_dev_parity_clear( struct pci_dev *dev ) |
| 1819 | { |
| 1820 | u8 header_type; |
| 1821 | |
| 1822 | get_pci_parity_status(dev, 0); |
| 1823 | |
| 1824 | /* read the device TYPE, looking for bridges */ |
| 1825 | pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type); |
| 1826 | |
| 1827 | if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) |
| 1828 | get_pci_parity_status(dev, 1); |
| 1829 | } |
| 1830 | |
| 1831 | /* |
| 1832 | * PCI Parity polling |
| 1833 | * |
| 1834 | */ |
| 1835 | static void edac_pci_dev_parity_test(struct pci_dev *dev) |
| 1836 | { |
| 1837 | u16 status; |
| 1838 | u8 header_type; |
| 1839 | |
| 1840 | /* read the STATUS register on this device |
| 1841 | */ |
| 1842 | status = get_pci_parity_status(dev, 0); |
| 1843 | |
| 1844 | debugf2("PCI STATUS= 0x%04x %s\n", status, dev->dev.bus_id ); |
| 1845 | |
| 1846 | /* check the status reg for errors */ |
| 1847 | if (status) { |
| 1848 | if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1849 | edac_printk(KERN_CRIT, EDAC_PCI, |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1850 | "Signaled System Error on %s\n", |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1851 | pci_name(dev)); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1852 | |
| 1853 | if (status & (PCI_STATUS_PARITY)) { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1854 | edac_printk(KERN_CRIT, EDAC_PCI, |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1855 | "Master Data Parity Error on %s\n", |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1856 | pci_name(dev)); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1857 | |
| 1858 | atomic_inc(&pci_parity_count); |
| 1859 | } |
| 1860 | |
| 1861 | if (status & (PCI_STATUS_DETECTED_PARITY)) { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1862 | edac_printk(KERN_CRIT, EDAC_PCI, |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1863 | "Detected Parity Error on %s\n", |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1864 | pci_name(dev)); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1865 | |
| 1866 | atomic_inc(&pci_parity_count); |
| 1867 | } |
| 1868 | } |
| 1869 | |
| 1870 | /* read the device TYPE, looking for bridges */ |
| 1871 | pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type); |
| 1872 | |
| 1873 | debugf2("PCI HEADER TYPE= 0x%02x %s\n", header_type, dev->dev.bus_id ); |
| 1874 | |
| 1875 | if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { |
| 1876 | /* On bridges, need to examine secondary status register */ |
| 1877 | status = get_pci_parity_status(dev, 1); |
| 1878 | |
| 1879 | debugf2("PCI SEC_STATUS= 0x%04x %s\n", |
| 1880 | status, dev->dev.bus_id ); |
| 1881 | |
| 1882 | /* check the secondary status reg for errors */ |
| 1883 | if (status) { |
| 1884 | if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1885 | edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1886 | "Signaled System Error on %s\n", |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1887 | pci_name(dev)); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1888 | |
| 1889 | if (status & (PCI_STATUS_PARITY)) { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1890 | edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " |
| 1891 | "Master Data Parity Error on " |
| 1892 | "%s\n", pci_name(dev)); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1893 | |
| 1894 | atomic_inc(&pci_parity_count); |
| 1895 | } |
| 1896 | |
| 1897 | if (status & (PCI_STATUS_DETECTED_PARITY)) { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1898 | edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1899 | "Detected Parity Error on %s\n", |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1900 | pci_name(dev)); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1901 | |
| 1902 | atomic_inc(&pci_parity_count); |
| 1903 | } |
| 1904 | } |
| 1905 | } |
| 1906 | } |
| 1907 | |
| 1908 | /* |
| 1909 | * check_dev_on_list: Scan for a PCI device on a white/black list |
| 1910 | * @list: an EDAC &edac_pci_device_list white/black list pointer |
| 1911 | * @free_index: index of next free entry on the list |
| 1912 | * @pci_dev: PCI Device pointer |
| 1913 | * |
| 1914 | * see if list contains the device. |
| 1915 | * |
| 1916 | * Returns: 0 not found |
| 1917 | * 1 found on list |
| 1918 | */ |
| 1919 | static int check_dev_on_list(struct edac_pci_device_list *list, int free_index, |
| 1920 | struct pci_dev *dev) |
| 1921 | { |
| 1922 | int i; |
| 1923 | int rc = 0; /* Assume not found */ |
| 1924 | unsigned short vendor=dev->vendor; |
| 1925 | unsigned short device=dev->device; |
| 1926 | |
| 1927 | /* Scan the list, looking for a vendor/device match |
| 1928 | */ |
| 1929 | for (i = 0; i < free_index; i++, list++ ) { |
| 1930 | if ( (list->vendor == vendor ) && |
| 1931 | (list->device == device )) { |
| 1932 | rc = 1; |
| 1933 | break; |
| 1934 | } |
| 1935 | } |
| 1936 | |
| 1937 | return rc; |
| 1938 | } |
| 1939 | |
| 1940 | /* |
| 1941 | * pci_dev parity list iterator |
| 1942 | * Scan the PCI device list for one iteration, looking for SERRORs |
| 1943 | * Master Parity ERRORS or Parity ERRORs on primary or secondary devices |
| 1944 | */ |
| 1945 | static inline void edac_pci_dev_parity_iterator(pci_parity_check_fn_t fn) |
| 1946 | { |
| 1947 | struct pci_dev *dev=NULL; |
| 1948 | |
| 1949 | /* request for kernel access to the next PCI device, if any, |
| 1950 | * and while we are looking at it have its reference count |
| 1951 | * bumped until we are done with it |
| 1952 | */ |
| 1953 | while((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { |
| 1954 | |
| 1955 | /* if whitelist exists then it has priority, so only scan those |
| 1956 | * devices on the whitelist |
| 1957 | */ |
| 1958 | if (pci_whitelist_count > 0 ) { |
| 1959 | if (check_dev_on_list(pci_whitelist, |
| 1960 | pci_whitelist_count, dev)) |
| 1961 | fn(dev); |
| 1962 | } else { |
| 1963 | /* |
| 1964 | * if no whitelist, then check if this devices is |
| 1965 | * blacklisted |
| 1966 | */ |
| 1967 | if (!check_dev_on_list(pci_blacklist, |
| 1968 | pci_blacklist_count, dev)) |
| 1969 | fn(dev); |
| 1970 | } |
| 1971 | } |
| 1972 | } |
| 1973 | |
| 1974 | static void do_pci_parity_check(void) |
| 1975 | { |
| 1976 | unsigned long flags; |
| 1977 | int before_count; |
| 1978 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1979 | debugf3("%s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1980 | |
| 1981 | if (!check_pci_parity) |
| 1982 | return; |
| 1983 | |
| 1984 | before_count = atomic_read(&pci_parity_count); |
| 1985 | |
| 1986 | /* scan all PCI devices looking for a Parity Error on devices and |
| 1987 | * bridges |
| 1988 | */ |
| 1989 | local_irq_save(flags); |
| 1990 | edac_pci_dev_parity_iterator(edac_pci_dev_parity_test); |
| 1991 | local_irq_restore(flags); |
| 1992 | |
| 1993 | /* Only if operator has selected panic on PCI Error */ |
| 1994 | if (panic_on_pci_parity) { |
| 1995 | /* If the count is different 'after' from 'before' */ |
| 1996 | if (before_count != atomic_read(&pci_parity_count)) |
| 1997 | panic("EDAC: PCI Parity Error"); |
| 1998 | } |
| 1999 | } |
| 2000 | |
| 2001 | |
| 2002 | static inline void clear_pci_parity_errors(void) |
| 2003 | { |
| 2004 | /* Clear any PCI bus parity errors that devices initially have logged |
| 2005 | * in their registers. |
| 2006 | */ |
| 2007 | edac_pci_dev_parity_iterator(edac_pci_dev_parity_clear); |
| 2008 | } |
| 2009 | |
| 2010 | |
| 2011 | #else /* CONFIG_PCI */ |
| 2012 | |
| 2013 | |
| 2014 | static inline void do_pci_parity_check(void) |
| 2015 | { |
| 2016 | /* no-op */ |
| 2017 | } |
| 2018 | |
| 2019 | |
| 2020 | static inline void clear_pci_parity_errors(void) |
| 2021 | { |
| 2022 | /* no-op */ |
| 2023 | } |
| 2024 | |
| 2025 | |
| 2026 | #endif /* CONFIG_PCI */ |
| 2027 | |
| 2028 | /* |
| 2029 | * Iterate over all MC instances and check for ECC, et al, errors |
| 2030 | */ |
| 2031 | static inline void check_mc_devices (void) |
| 2032 | { |
| 2033 | unsigned long flags; |
| 2034 | struct list_head *item; |
| 2035 | struct mem_ctl_info *mci; |
| 2036 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 2037 | debugf3("%s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 2038 | |
| 2039 | /* during poll, have interrupts off */ |
| 2040 | local_irq_save(flags); |
| 2041 | |
| 2042 | list_for_each(item, &mc_devices) { |
| 2043 | mci = list_entry(item, struct mem_ctl_info, link); |
| 2044 | |
| 2045 | if (mci->edac_check != NULL) |
| 2046 | mci->edac_check(mci); |
| 2047 | } |
| 2048 | |
| 2049 | local_irq_restore(flags); |
| 2050 | } |
| 2051 | |
| 2052 | |
| 2053 | /* |
| 2054 | * Check MC status every poll_msec. |
| 2055 | * Check PCI status every poll_msec as well. |
| 2056 | * |
| 2057 | * This where the work gets done for edac. |
| 2058 | * |
| 2059 | * SMP safe, doesn't use NMI, and auto-rate-limits. |
| 2060 | */ |
| 2061 | static void do_edac_check(void) |
| 2062 | { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 2063 | debugf3("%s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 2064 | check_mc_devices(); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 2065 | do_pci_parity_check(); |
| 2066 | } |
| 2067 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 2068 | static int edac_kernel_thread(void *arg) |
| 2069 | { |
Dave Peterson | f2fe42a | 2006-03-26 01:38:38 -0800 | [diff] [blame] | 2070 | while (!kthread_should_stop()) { |
| 2071 | do_edac_check(); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 2072 | |
| 2073 | /* goto sleep for the interval */ |
Dave Peterson | f2fe42a | 2006-03-26 01:38:38 -0800 | [diff] [blame] | 2074 | schedule_timeout_interruptible((HZ * poll_msec) / 1000); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 2075 | try_to_freeze(); |
| 2076 | } |
| 2077 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 2078 | return 0; |
| 2079 | } |
| 2080 | |
| 2081 | /* |
| 2082 | * edac_mc_init |
| 2083 | * module initialization entry point |
| 2084 | */ |
| 2085 | static int __init edac_mc_init(void) |
| 2086 | { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 2087 | edac_printk(KERN_INFO, EDAC_MC, EDAC_MC_VERSION "\n"); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 2088 | |
| 2089 | /* |
| 2090 | * Harvest and clear any boot/initialization PCI parity errors |
| 2091 | * |
| 2092 | * FIXME: This only clears errors logged by devices present at time of |
| 2093 | * module initialization. We should also do an initial clear |
| 2094 | * of each newly hotplugged device. |
| 2095 | */ |
| 2096 | clear_pci_parity_errors(); |
| 2097 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 2098 | /* Create the MC sysfs entires */ |
| 2099 | if (edac_sysfs_memctrl_setup()) { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 2100 | edac_printk(KERN_ERR, EDAC_MC, |
| 2101 | "Error initializing sysfs code\n"); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 2102 | return -ENODEV; |
| 2103 | } |
| 2104 | |
| 2105 | /* Create the PCI parity sysfs entries */ |
| 2106 | if (edac_sysfs_pci_setup()) { |
| 2107 | edac_sysfs_memctrl_teardown(); |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 2108 | edac_printk(KERN_ERR, EDAC_MC, |
| 2109 | "EDAC PCI: Error initializing sysfs code\n"); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 2110 | return -ENODEV; |
| 2111 | } |
| 2112 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 2113 | /* create our kernel thread */ |
Dave Peterson | f2fe42a | 2006-03-26 01:38:38 -0800 | [diff] [blame] | 2114 | edac_thread = kthread_run(edac_kernel_thread, NULL, "kedac"); |
| 2115 | if (IS_ERR(edac_thread)) { |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 2116 | /* remove the sysfs entries */ |
| 2117 | edac_sysfs_memctrl_teardown(); |
| 2118 | edac_sysfs_pci_teardown(); |
Dave Peterson | f2fe42a | 2006-03-26 01:38:38 -0800 | [diff] [blame] | 2119 | return PTR_ERR(edac_thread); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 2120 | } |
| 2121 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 2122 | return 0; |
| 2123 | } |
| 2124 | |
| 2125 | |
| 2126 | /* |
| 2127 | * edac_mc_exit() |
| 2128 | * module exit/termination functioni |
| 2129 | */ |
| 2130 | static void __exit edac_mc_exit(void) |
| 2131 | { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 2132 | debugf0("%s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 2133 | |
Dave Peterson | f2fe42a | 2006-03-26 01:38:38 -0800 | [diff] [blame] | 2134 | kthread_stop(edac_thread); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 2135 | |
| 2136 | /* tear down the sysfs device */ |
| 2137 | edac_sysfs_memctrl_teardown(); |
| 2138 | edac_sysfs_pci_teardown(); |
| 2139 | } |
| 2140 | |
| 2141 | |
| 2142 | |
| 2143 | |
| 2144 | module_init(edac_mc_init); |
| 2145 | module_exit(edac_mc_exit); |
| 2146 | |
| 2147 | MODULE_LICENSE("GPL"); |
| 2148 | MODULE_AUTHOR("Linux Networx (http://lnxi.com) Thayne Harbaugh et al\n" |
| 2149 | "Based on.work by Dan Hollis et al"); |
| 2150 | MODULE_DESCRIPTION("Core library routines for MC reporting"); |
| 2151 | |
| 2152 | module_param(panic_on_ue, int, 0644); |
| 2153 | MODULE_PARM_DESC(panic_on_ue, "Panic on uncorrected error: 0=off 1=on"); |
| 2154 | module_param(check_pci_parity, int, 0644); |
| 2155 | MODULE_PARM_DESC(check_pci_parity, "Check for PCI bus parity errors: 0=off 1=on"); |
| 2156 | module_param(panic_on_pci_parity, int, 0644); |
| 2157 | MODULE_PARM_DESC(panic_on_pci_parity, "Panic on PCI Bus Parity error: 0=off 1=on"); |
| 2158 | module_param(log_ue, int, 0644); |
| 2159 | MODULE_PARM_DESC(log_ue, "Log uncorrectable error to console: 0=off 1=on"); |
| 2160 | module_param(log_ce, int, 0644); |
| 2161 | MODULE_PARM_DESC(log_ce, "Log correctable error to console: 0=off 1=on"); |
| 2162 | module_param(poll_msec, int, 0644); |
| 2163 | MODULE_PARM_DESC(poll_msec, "Polling period in milliseconds"); |
| 2164 | #ifdef CONFIG_EDAC_DEBUG |
| 2165 | module_param(edac_debug_level, int, 0644); |
| 2166 | MODULE_PARM_DESC(edac_debug_level, "Debug level"); |
| 2167 | #endif |