Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1 | /* |
| 2 | * edac_mc kernel module |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 3 | * (C) 2005, 2006 Linux Networx (http://lnxi.com) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 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 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 15 | #include <linux/module.h> |
| 16 | #include <linux/proc_fs.h> |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/types.h> |
| 19 | #include <linux/smp.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/sysctl.h> |
| 22 | #include <linux/highmem.h> |
| 23 | #include <linux/timer.h> |
| 24 | #include <linux/slab.h> |
| 25 | #include <linux/jiffies.h> |
| 26 | #include <linux/spinlock.h> |
| 27 | #include <linux/list.h> |
| 28 | #include <linux/sysdev.h> |
| 29 | #include <linux/ctype.h> |
Dave Peterson | f2fe42a | 2006-03-26 01:38:38 -0800 | [diff] [blame] | 30 | #include <linux/kthread.h> |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 31 | #include <asm/uaccess.h> |
| 32 | #include <asm/page.h> |
| 33 | #include <asm/edac.h> |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 34 | #include "edac_mc.h" |
| 35 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 36 | #define EDAC_MC_VERSION "Ver: 2.0.1 " __DATE__ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 37 | |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 38 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 39 | #ifdef CONFIG_EDAC_DEBUG |
| 40 | /* Values of 0 to 4 will generate output */ |
| 41 | int edac_debug_level = 1; |
Dave Peterson | 9110540 | 2006-03-26 01:38:55 -0800 | [diff] [blame] | 42 | EXPORT_SYMBOL_GPL(edac_debug_level); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 43 | #endif |
| 44 | |
| 45 | /* EDAC Controls, setable by module parameter, and sysfs */ |
| 46 | static int log_ue = 1; |
| 47 | static int log_ce = 1; |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 48 | static int panic_on_ue; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 49 | static int poll_msec = 1000; |
| 50 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 51 | /* lock to memory controller's control array */ |
| 52 | static DECLARE_MUTEX(mem_ctls_mutex); |
| 53 | static struct list_head mc_devices = LIST_HEAD_INIT(mc_devices); |
| 54 | |
Dave Peterson | f2fe42a | 2006-03-26 01:38:38 -0800 | [diff] [blame] | 55 | static struct task_struct *edac_thread; |
| 56 | |
Doug Thompson | 37f0458 | 2006-06-30 01:56:07 -0700 | [diff] [blame] | 57 | #ifdef CONFIG_PCI |
| 58 | static int check_pci_parity = 0; /* default YES check PCI parity */ |
| 59 | static int panic_on_pci_parity; /* default no panic on PCI Parity */ |
| 60 | static atomic_t pci_parity_count = ATOMIC_INIT(0); |
| 61 | |
Doug Thompson | 37f0458 | 2006-06-30 01:56:07 -0700 | [diff] [blame] | 62 | static struct kobject edac_pci_kobj; /* /sys/devices/system/edac/pci */ |
| 63 | static struct completion edac_pci_kobj_complete; |
Doug Thompson | 37f0458 | 2006-06-30 01:56:07 -0700 | [diff] [blame] | 64 | #endif /* CONFIG_PCI */ |
| 65 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 66 | /* START sysfs data and methods */ |
| 67 | |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 68 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 69 | static const char *mem_types[] = { |
| 70 | [MEM_EMPTY] = "Empty", |
| 71 | [MEM_RESERVED] = "Reserved", |
| 72 | [MEM_UNKNOWN] = "Unknown", |
| 73 | [MEM_FPM] = "FPM", |
| 74 | [MEM_EDO] = "EDO", |
| 75 | [MEM_BEDO] = "BEDO", |
| 76 | [MEM_SDR] = "Unbuffered-SDR", |
| 77 | [MEM_RDR] = "Registered-SDR", |
| 78 | [MEM_DDR] = "Unbuffered-DDR", |
| 79 | [MEM_RDDR] = "Registered-DDR", |
| 80 | [MEM_RMBS] = "RMBS" |
| 81 | }; |
| 82 | |
| 83 | static const char *dev_types[] = { |
| 84 | [DEV_UNKNOWN] = "Unknown", |
| 85 | [DEV_X1] = "x1", |
| 86 | [DEV_X2] = "x2", |
| 87 | [DEV_X4] = "x4", |
| 88 | [DEV_X8] = "x8", |
| 89 | [DEV_X16] = "x16", |
| 90 | [DEV_X32] = "x32", |
| 91 | [DEV_X64] = "x64" |
| 92 | }; |
| 93 | |
| 94 | static const char *edac_caps[] = { |
| 95 | [EDAC_UNKNOWN] = "Unknown", |
| 96 | [EDAC_NONE] = "None", |
| 97 | [EDAC_RESERVED] = "Reserved", |
| 98 | [EDAC_PARITY] = "PARITY", |
| 99 | [EDAC_EC] = "EC", |
| 100 | [EDAC_SECDED] = "SECDED", |
| 101 | [EDAC_S2ECD2ED] = "S2ECD2ED", |
| 102 | [EDAC_S4ECD4ED] = "S4ECD4ED", |
| 103 | [EDAC_S8ECD8ED] = "S8ECD8ED", |
| 104 | [EDAC_S16ECD16ED] = "S16ECD16ED" |
| 105 | }; |
| 106 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 107 | /* sysfs object: /sys/devices/system/edac */ |
| 108 | static struct sysdev_class edac_class = { |
| 109 | set_kset_name("edac"), |
| 110 | }; |
| 111 | |
Doug Thompson | 37f0458 | 2006-06-30 01:56:07 -0700 | [diff] [blame] | 112 | /* sysfs object: |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 113 | * /sys/devices/system/edac/mc |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 114 | */ |
| 115 | static struct kobject edac_memctrl_kobj; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 116 | |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 117 | /* We use these to wait for the reference counts on edac_memctrl_kobj and |
| 118 | * edac_pci_kobj to reach 0. |
| 119 | */ |
| 120 | static struct completion edac_memctrl_kobj_complete; |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 121 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 122 | /* |
| 123 | * /sys/devices/system/edac/mc; |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 124 | * data structures and methods |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 125 | */ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 126 | static ssize_t memctrl_int_show(void *ptr, char *buffer) |
| 127 | { |
| 128 | int *value = (int*) ptr; |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 129 | return sprintf(buffer, "%u\n", *value); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 130 | } |
| 131 | |
| 132 | static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count) |
| 133 | { |
| 134 | int *value = (int*) ptr; |
| 135 | |
| 136 | if (isdigit(*buffer)) |
| 137 | *value = simple_strtoul(buffer, NULL, 0); |
| 138 | |
| 139 | return count; |
| 140 | } |
| 141 | |
| 142 | struct memctrl_dev_attribute { |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 143 | struct attribute attr; |
| 144 | void *value; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 145 | ssize_t (*show)(void *,char *); |
| 146 | ssize_t (*store)(void *, const char *, size_t); |
| 147 | }; |
| 148 | |
| 149 | /* Set of show/store abstract level functions for memory control object */ |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 150 | static ssize_t memctrl_dev_show(struct kobject *kobj, |
| 151 | struct attribute *attr, char *buffer) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 152 | { |
| 153 | struct memctrl_dev_attribute *memctrl_dev; |
| 154 | memctrl_dev = (struct memctrl_dev_attribute*)attr; |
| 155 | |
| 156 | if (memctrl_dev->show) |
| 157 | return memctrl_dev->show(memctrl_dev->value, buffer); |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 158 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 159 | return -EIO; |
| 160 | } |
| 161 | |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 162 | static ssize_t memctrl_dev_store(struct kobject *kobj, struct attribute *attr, |
| 163 | const char *buffer, size_t count) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 164 | { |
| 165 | struct memctrl_dev_attribute *memctrl_dev; |
| 166 | memctrl_dev = (struct memctrl_dev_attribute*)attr; |
| 167 | |
| 168 | if (memctrl_dev->store) |
| 169 | return memctrl_dev->store(memctrl_dev->value, buffer, count); |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 170 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 171 | return -EIO; |
| 172 | } |
| 173 | |
| 174 | static struct sysfs_ops memctrlfs_ops = { |
| 175 | .show = memctrl_dev_show, |
| 176 | .store = memctrl_dev_store |
| 177 | }; |
| 178 | |
| 179 | #define MEMCTRL_ATTR(_name,_mode,_show,_store) \ |
| 180 | struct memctrl_dev_attribute attr_##_name = { \ |
| 181 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 182 | .value = &_name, \ |
| 183 | .show = _show, \ |
| 184 | .store = _store, \ |
| 185 | }; |
| 186 | |
| 187 | #define MEMCTRL_STRING_ATTR(_name,_data,_mode,_show,_store) \ |
| 188 | struct memctrl_dev_attribute attr_##_name = { \ |
| 189 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 190 | .value = _data, \ |
| 191 | .show = _show, \ |
| 192 | .store = _store, \ |
| 193 | }; |
| 194 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 195 | /* csrow<id> control files */ |
| 196 | MEMCTRL_ATTR(panic_on_ue,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store); |
| 197 | MEMCTRL_ATTR(log_ue,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store); |
| 198 | MEMCTRL_ATTR(log_ce,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store); |
| 199 | MEMCTRL_ATTR(poll_msec,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store); |
| 200 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 201 | /* Base Attributes of the memory ECC object */ |
| 202 | static struct memctrl_dev_attribute *memctrl_attr[] = { |
| 203 | &attr_panic_on_ue, |
| 204 | &attr_log_ue, |
| 205 | &attr_log_ce, |
| 206 | &attr_poll_msec, |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 207 | NULL, |
| 208 | }; |
| 209 | |
| 210 | /* Main MC kobject release() function */ |
| 211 | static void edac_memctrl_master_release(struct kobject *kobj) |
| 212 | { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 213 | debugf1("%s()\n", __func__); |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 214 | complete(&edac_memctrl_kobj_complete); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 215 | } |
| 216 | |
| 217 | static struct kobj_type ktype_memctrl = { |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 218 | .release = edac_memctrl_master_release, |
| 219 | .sysfs_ops = &memctrlfs_ops, |
| 220 | .default_attrs = (struct attribute **) memctrl_attr, |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 221 | }; |
| 222 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 223 | /* Initialize the main sysfs entries for edac: |
| 224 | * /sys/devices/system/edac |
| 225 | * |
| 226 | * and children |
| 227 | * |
| 228 | * Return: 0 SUCCESS |
| 229 | * !0 FAILURE |
| 230 | */ |
| 231 | static int edac_sysfs_memctrl_setup(void) |
| 232 | { |
Akinobu Mita | 77d6e13 | 2006-11-02 22:07:10 -0800 | [diff] [blame] | 233 | int err = 0; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 234 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 235 | debugf1("%s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 236 | |
| 237 | /* create the /sys/devices/system/edac directory */ |
| 238 | err = sysdev_class_register(&edac_class); |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 239 | |
Akinobu Mita | 77d6e13 | 2006-11-02 22:07:10 -0800 | [diff] [blame] | 240 | if (err) { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 241 | debugf1("%s() error=%d\n", __func__, err); |
Akinobu Mita | 77d6e13 | 2006-11-02 22:07:10 -0800 | [diff] [blame] | 242 | return err; |
| 243 | } |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 244 | |
Akinobu Mita | 77d6e13 | 2006-11-02 22:07:10 -0800 | [diff] [blame] | 245 | /* Init the MC's kobject */ |
| 246 | memset(&edac_memctrl_kobj, 0, sizeof (edac_memctrl_kobj)); |
| 247 | edac_memctrl_kobj.parent = &edac_class.kset.kobj; |
| 248 | edac_memctrl_kobj.ktype = &ktype_memctrl; |
| 249 | |
| 250 | /* generate sysfs "..../edac/mc" */ |
| 251 | err = kobject_set_name(&edac_memctrl_kobj,"mc"); |
| 252 | |
| 253 | if (err) |
| 254 | goto fail; |
| 255 | |
| 256 | /* FIXME: maybe new sysdev_create_subdir() */ |
| 257 | err = kobject_register(&edac_memctrl_kobj); |
| 258 | |
| 259 | if (err) { |
| 260 | debugf1("Failed to register '.../edac/mc'\n"); |
| 261 | goto fail; |
| 262 | } |
| 263 | |
| 264 | debugf1("Registered '.../edac/mc' kobject\n"); |
| 265 | |
| 266 | return 0; |
| 267 | |
| 268 | fail: |
| 269 | sysdev_class_unregister(&edac_class); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 270 | return err; |
| 271 | } |
| 272 | |
| 273 | /* |
| 274 | * MC teardown: |
| 275 | * the '..../edac/mc' kobject followed by '..../edac' itself |
| 276 | */ |
| 277 | static void edac_sysfs_memctrl_teardown(void) |
| 278 | { |
| 279 | debugf0("MC: " __FILE__ ": %s()\n", __func__); |
| 280 | |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 281 | /* Unregister the MC's kobject and wait for reference count to reach |
| 282 | * 0. |
| 283 | */ |
| 284 | init_completion(&edac_memctrl_kobj_complete); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 285 | kobject_unregister(&edac_memctrl_kobj); |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 286 | wait_for_completion(&edac_memctrl_kobj_complete); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 287 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 288 | /* Unregister the 'edac' object */ |
| 289 | sysdev_class_unregister(&edac_class); |
| 290 | } |
| 291 | |
Doug Thompson | 37f0458 | 2006-06-30 01:56:07 -0700 | [diff] [blame] | 292 | #ifdef CONFIG_PCI |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 293 | static ssize_t edac_pci_int_show(void *ptr, char *buffer) |
| 294 | { |
| 295 | int *value = ptr; |
| 296 | return sprintf(buffer,"%d\n",*value); |
| 297 | } |
| 298 | |
| 299 | static ssize_t edac_pci_int_store(void *ptr, const char *buffer, size_t count) |
| 300 | { |
| 301 | int *value = ptr; |
| 302 | |
| 303 | if (isdigit(*buffer)) |
| 304 | *value = simple_strtoul(buffer,NULL,0); |
| 305 | |
| 306 | return count; |
| 307 | } |
| 308 | |
| 309 | struct edac_pci_dev_attribute { |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 310 | struct attribute attr; |
| 311 | void *value; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 312 | ssize_t (*show)(void *,char *); |
| 313 | ssize_t (*store)(void *, const char *,size_t); |
| 314 | }; |
| 315 | |
| 316 | /* Set of show/store abstract level functions for PCI Parity object */ |
| 317 | static ssize_t edac_pci_dev_show(struct kobject *kobj, struct attribute *attr, |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 318 | char *buffer) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 319 | { |
| 320 | struct edac_pci_dev_attribute *edac_pci_dev; |
| 321 | edac_pci_dev= (struct edac_pci_dev_attribute*)attr; |
| 322 | |
| 323 | if (edac_pci_dev->show) |
| 324 | return edac_pci_dev->show(edac_pci_dev->value, buffer); |
| 325 | return -EIO; |
| 326 | } |
| 327 | |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 328 | static ssize_t edac_pci_dev_store(struct kobject *kobj, |
| 329 | struct attribute *attr, const char *buffer, size_t count) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 330 | { |
| 331 | struct edac_pci_dev_attribute *edac_pci_dev; |
| 332 | edac_pci_dev= (struct edac_pci_dev_attribute*)attr; |
| 333 | |
| 334 | if (edac_pci_dev->show) |
| 335 | return edac_pci_dev->store(edac_pci_dev->value, buffer, count); |
| 336 | return -EIO; |
| 337 | } |
| 338 | |
| 339 | static struct sysfs_ops edac_pci_sysfs_ops = { |
| 340 | .show = edac_pci_dev_show, |
| 341 | .store = edac_pci_dev_store |
| 342 | }; |
| 343 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 344 | #define EDAC_PCI_ATTR(_name,_mode,_show,_store) \ |
| 345 | struct edac_pci_dev_attribute edac_pci_attr_##_name = { \ |
| 346 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 347 | .value = &_name, \ |
| 348 | .show = _show, \ |
| 349 | .store = _store, \ |
| 350 | }; |
| 351 | |
| 352 | #define EDAC_PCI_STRING_ATTR(_name,_data,_mode,_show,_store) \ |
| 353 | struct edac_pci_dev_attribute edac_pci_attr_##_name = { \ |
| 354 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 355 | .value = _data, \ |
| 356 | .show = _show, \ |
| 357 | .store = _store, \ |
| 358 | }; |
| 359 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 360 | /* PCI Parity control files */ |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 361 | EDAC_PCI_ATTR(check_pci_parity, S_IRUGO|S_IWUSR, edac_pci_int_show, |
| 362 | edac_pci_int_store); |
| 363 | EDAC_PCI_ATTR(panic_on_pci_parity, S_IRUGO|S_IWUSR, edac_pci_int_show, |
| 364 | edac_pci_int_store); |
| 365 | EDAC_PCI_ATTR(pci_parity_count, S_IRUGO, edac_pci_int_show, NULL); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 366 | |
| 367 | /* Base Attributes of the memory ECC object */ |
| 368 | static struct edac_pci_dev_attribute *edac_pci_attr[] = { |
| 369 | &edac_pci_attr_check_pci_parity, |
| 370 | &edac_pci_attr_panic_on_pci_parity, |
| 371 | &edac_pci_attr_pci_parity_count, |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 372 | NULL, |
| 373 | }; |
| 374 | |
| 375 | /* No memory to release */ |
| 376 | static void edac_pci_release(struct kobject *kobj) |
| 377 | { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 378 | debugf1("%s()\n", __func__); |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 379 | complete(&edac_pci_kobj_complete); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 380 | } |
| 381 | |
| 382 | static struct kobj_type ktype_edac_pci = { |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 383 | .release = edac_pci_release, |
| 384 | .sysfs_ops = &edac_pci_sysfs_ops, |
| 385 | .default_attrs = (struct attribute **) edac_pci_attr, |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 386 | }; |
| 387 | |
| 388 | /** |
| 389 | * edac_sysfs_pci_setup() |
| 390 | * |
| 391 | */ |
| 392 | static int edac_sysfs_pci_setup(void) |
| 393 | { |
| 394 | int err; |
| 395 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 396 | debugf1("%s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 397 | |
| 398 | memset(&edac_pci_kobj, 0, sizeof(edac_pci_kobj)); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 399 | edac_pci_kobj.parent = &edac_class.kset.kobj; |
| 400 | edac_pci_kobj.ktype = &ktype_edac_pci; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 401 | err = kobject_set_name(&edac_pci_kobj, "pci"); |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 402 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 403 | if (!err) { |
| 404 | /* Instanstiate the csrow object */ |
| 405 | /* FIXME: maybe new sysdev_create_subdir() */ |
| 406 | err = kobject_register(&edac_pci_kobj); |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 407 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 408 | if (err) |
| 409 | debugf1("Failed to register '.../edac/pci'\n"); |
| 410 | else |
| 411 | debugf1("Registered '.../edac/pci' kobject\n"); |
| 412 | } |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 413 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 414 | return err; |
| 415 | } |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 416 | |
| 417 | static void edac_sysfs_pci_teardown(void) |
| 418 | { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 419 | debugf0("%s()\n", __func__); |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 420 | init_completion(&edac_pci_kobj_complete); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 421 | kobject_unregister(&edac_pci_kobj); |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 422 | wait_for_completion(&edac_pci_kobj_complete); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 423 | } |
| 424 | |
Doug Thompson | 37f0458 | 2006-06-30 01:56:07 -0700 | [diff] [blame] | 425 | |
| 426 | static u16 get_pci_parity_status(struct pci_dev *dev, int secondary) |
| 427 | { |
| 428 | int where; |
| 429 | u16 status; |
| 430 | |
| 431 | where = secondary ? PCI_SEC_STATUS : PCI_STATUS; |
| 432 | pci_read_config_word(dev, where, &status); |
| 433 | |
| 434 | /* If we get back 0xFFFF then we must suspect that the card has been |
| 435 | * pulled but the Linux PCI layer has not yet finished cleaning up. |
| 436 | * We don't want to report on such devices |
| 437 | */ |
| 438 | |
| 439 | if (status == 0xFFFF) { |
| 440 | u32 sanity; |
| 441 | |
| 442 | pci_read_config_dword(dev, 0, &sanity); |
| 443 | |
| 444 | if (sanity == 0xFFFFFFFF) |
| 445 | return 0; |
| 446 | } |
| 447 | |
| 448 | status &= PCI_STATUS_DETECTED_PARITY | PCI_STATUS_SIG_SYSTEM_ERROR | |
| 449 | PCI_STATUS_PARITY; |
| 450 | |
| 451 | if (status) |
| 452 | /* reset only the bits we are interested in */ |
| 453 | pci_write_config_word(dev, where, status); |
| 454 | |
| 455 | return status; |
| 456 | } |
| 457 | |
| 458 | typedef void (*pci_parity_check_fn_t) (struct pci_dev *dev); |
| 459 | |
| 460 | /* Clear any PCI parity errors logged by this device. */ |
| 461 | static void edac_pci_dev_parity_clear(struct pci_dev *dev) |
| 462 | { |
| 463 | u8 header_type; |
| 464 | |
| 465 | get_pci_parity_status(dev, 0); |
| 466 | |
| 467 | /* read the device TYPE, looking for bridges */ |
| 468 | pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type); |
| 469 | |
| 470 | if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) |
| 471 | get_pci_parity_status(dev, 1); |
| 472 | } |
| 473 | |
| 474 | /* |
| 475 | * PCI Parity polling |
| 476 | * |
| 477 | */ |
| 478 | static void edac_pci_dev_parity_test(struct pci_dev *dev) |
| 479 | { |
| 480 | u16 status; |
| 481 | u8 header_type; |
| 482 | |
| 483 | /* read the STATUS register on this device |
| 484 | */ |
| 485 | status = get_pci_parity_status(dev, 0); |
| 486 | |
| 487 | debugf2("PCI STATUS= 0x%04x %s\n", status, dev->dev.bus_id ); |
| 488 | |
| 489 | /* check the status reg for errors */ |
| 490 | if (status) { |
| 491 | if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) |
| 492 | edac_printk(KERN_CRIT, EDAC_PCI, |
| 493 | "Signaled System Error on %s\n", |
| 494 | pci_name(dev)); |
| 495 | |
| 496 | if (status & (PCI_STATUS_PARITY)) { |
| 497 | edac_printk(KERN_CRIT, EDAC_PCI, |
| 498 | "Master Data Parity Error on %s\n", |
| 499 | pci_name(dev)); |
| 500 | |
| 501 | atomic_inc(&pci_parity_count); |
| 502 | } |
| 503 | |
| 504 | if (status & (PCI_STATUS_DETECTED_PARITY)) { |
| 505 | edac_printk(KERN_CRIT, EDAC_PCI, |
| 506 | "Detected Parity Error on %s\n", |
| 507 | pci_name(dev)); |
| 508 | |
| 509 | atomic_inc(&pci_parity_count); |
| 510 | } |
| 511 | } |
| 512 | |
| 513 | /* read the device TYPE, looking for bridges */ |
| 514 | pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type); |
| 515 | |
| 516 | debugf2("PCI HEADER TYPE= 0x%02x %s\n", header_type, dev->dev.bus_id ); |
| 517 | |
| 518 | if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { |
| 519 | /* On bridges, need to examine secondary status register */ |
| 520 | status = get_pci_parity_status(dev, 1); |
| 521 | |
| 522 | debugf2("PCI SEC_STATUS= 0x%04x %s\n", |
| 523 | status, dev->dev.bus_id ); |
| 524 | |
| 525 | /* check the secondary status reg for errors */ |
| 526 | if (status) { |
| 527 | if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) |
| 528 | edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " |
| 529 | "Signaled System Error on %s\n", |
| 530 | pci_name(dev)); |
| 531 | |
| 532 | if (status & (PCI_STATUS_PARITY)) { |
| 533 | edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " |
| 534 | "Master Data Parity Error on " |
| 535 | "%s\n", pci_name(dev)); |
| 536 | |
| 537 | atomic_inc(&pci_parity_count); |
| 538 | } |
| 539 | |
| 540 | if (status & (PCI_STATUS_DETECTED_PARITY)) { |
| 541 | edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " |
| 542 | "Detected Parity Error on %s\n", |
| 543 | pci_name(dev)); |
| 544 | |
| 545 | atomic_inc(&pci_parity_count); |
| 546 | } |
| 547 | } |
| 548 | } |
| 549 | } |
| 550 | |
| 551 | /* |
Doug Thompson | 37f0458 | 2006-06-30 01:56:07 -0700 | [diff] [blame] | 552 | * pci_dev parity list iterator |
| 553 | * Scan the PCI device list for one iteration, looking for SERRORs |
| 554 | * Master Parity ERRORS or Parity ERRORs on primary or secondary devices |
| 555 | */ |
| 556 | static inline void edac_pci_dev_parity_iterator(pci_parity_check_fn_t fn) |
| 557 | { |
| 558 | struct pci_dev *dev = NULL; |
| 559 | |
| 560 | /* request for kernel access to the next PCI device, if any, |
| 561 | * and while we are looking at it have its reference count |
| 562 | * bumped until we are done with it |
| 563 | */ |
| 564 | while((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 565 | fn(dev); |
Doug Thompson | 37f0458 | 2006-06-30 01:56:07 -0700 | [diff] [blame] | 566 | } |
| 567 | } |
| 568 | |
| 569 | static void do_pci_parity_check(void) |
| 570 | { |
| 571 | unsigned long flags; |
| 572 | int before_count; |
| 573 | |
| 574 | debugf3("%s()\n", __func__); |
| 575 | |
| 576 | if (!check_pci_parity) |
| 577 | return; |
| 578 | |
| 579 | before_count = atomic_read(&pci_parity_count); |
| 580 | |
| 581 | /* scan all PCI devices looking for a Parity Error on devices and |
| 582 | * bridges |
| 583 | */ |
| 584 | local_irq_save(flags); |
| 585 | edac_pci_dev_parity_iterator(edac_pci_dev_parity_test); |
| 586 | local_irq_restore(flags); |
| 587 | |
| 588 | /* Only if operator has selected panic on PCI Error */ |
| 589 | if (panic_on_pci_parity) { |
| 590 | /* If the count is different 'after' from 'before' */ |
| 591 | if (before_count != atomic_read(&pci_parity_count)) |
| 592 | panic("EDAC: PCI Parity Error"); |
| 593 | } |
| 594 | } |
| 595 | |
| 596 | static inline void clear_pci_parity_errors(void) |
| 597 | { |
| 598 | /* Clear any PCI bus parity errors that devices initially have logged |
| 599 | * in their registers. |
| 600 | */ |
| 601 | edac_pci_dev_parity_iterator(edac_pci_dev_parity_clear); |
| 602 | } |
| 603 | |
| 604 | #else /* CONFIG_PCI */ |
| 605 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 606 | /* pre-process these away */ |
| 607 | #define do_pci_parity_check() |
| 608 | #define clear_pci_parity_errors() |
| 609 | #define edac_sysfs_pci_teardown() |
| 610 | #define edac_sysfs_pci_setup() (0) |
Doug Thompson | 37f0458 | 2006-06-30 01:56:07 -0700 | [diff] [blame] | 611 | |
Doug Thompson | 37f0458 | 2006-06-30 01:56:07 -0700 | [diff] [blame] | 612 | #endif /* CONFIG_PCI */ |
| 613 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 614 | /* EDAC sysfs CSROW data structures and methods |
| 615 | */ |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 616 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 617 | /* Set of more default csrow<id> attribute show/store functions */ |
| 618 | static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data, int private) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 619 | { |
| 620 | return sprintf(data,"%u\n", csrow->ue_count); |
| 621 | } |
| 622 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 623 | static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data, int private) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 624 | { |
| 625 | return sprintf(data,"%u\n", csrow->ce_count); |
| 626 | } |
| 627 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 628 | static ssize_t csrow_size_show(struct csrow_info *csrow, char *data, int private) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 629 | { |
| 630 | return sprintf(data,"%u\n", PAGES_TO_MiB(csrow->nr_pages)); |
| 631 | } |
| 632 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 633 | static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data, int private) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 634 | { |
| 635 | return sprintf(data,"%s\n", mem_types[csrow->mtype]); |
| 636 | } |
| 637 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 638 | static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data, int private) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 639 | { |
| 640 | return sprintf(data,"%s\n", dev_types[csrow->dtype]); |
| 641 | } |
| 642 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 643 | static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data, int private) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 644 | { |
| 645 | return sprintf(data,"%s\n", edac_caps[csrow->edac_mode]); |
| 646 | } |
| 647 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 648 | /* show/store functions for DIMM Label attributes */ |
| 649 | static ssize_t channel_dimm_label_show(struct csrow_info *csrow, |
| 650 | char *data, int channel) |
| 651 | { |
| 652 | return snprintf(data, EDAC_MC_LABEL_LEN,"%s", |
| 653 | csrow->channels[channel].label); |
| 654 | } |
| 655 | |
| 656 | static ssize_t channel_dimm_label_store(struct csrow_info *csrow, |
| 657 | const char *data, |
| 658 | size_t count, |
| 659 | int channel) |
| 660 | { |
| 661 | ssize_t max_size = 0; |
| 662 | |
| 663 | max_size = min((ssize_t)count,(ssize_t)EDAC_MC_LABEL_LEN-1); |
| 664 | strncpy(csrow->channels[channel].label, data, max_size); |
| 665 | csrow->channels[channel].label[max_size] = '\0'; |
| 666 | |
| 667 | return max_size; |
| 668 | } |
| 669 | |
| 670 | /* show function for dynamic chX_ce_count attribute */ |
| 671 | static ssize_t channel_ce_count_show(struct csrow_info *csrow, |
| 672 | char *data, |
| 673 | int channel) |
| 674 | { |
| 675 | return sprintf(data, "%u\n", csrow->channels[channel].ce_count); |
| 676 | } |
| 677 | |
| 678 | /* csrow specific attribute structure */ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 679 | struct csrowdev_attribute { |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 680 | struct attribute attr; |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 681 | ssize_t (*show)(struct csrow_info *,char *,int); |
| 682 | ssize_t (*store)(struct csrow_info *, const char *,size_t,int); |
| 683 | int private; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 684 | }; |
| 685 | |
| 686 | #define to_csrow(k) container_of(k, struct csrow_info, kobj) |
| 687 | #define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr) |
| 688 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 689 | /* Set of show/store higher level functions for default csrow attributes */ |
| 690 | static ssize_t csrowdev_show(struct kobject *kobj, |
| 691 | struct attribute *attr, |
| 692 | char *buffer) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 693 | { |
| 694 | struct csrow_info *csrow = to_csrow(kobj); |
| 695 | struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr); |
| 696 | |
| 697 | if (csrowdev_attr->show) |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 698 | return csrowdev_attr->show(csrow, |
| 699 | buffer, |
| 700 | csrowdev_attr->private); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 701 | return -EIO; |
| 702 | } |
| 703 | |
| 704 | static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr, |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 705 | const char *buffer, size_t count) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 706 | { |
| 707 | struct csrow_info *csrow = to_csrow(kobj); |
| 708 | struct csrowdev_attribute * csrowdev_attr = to_csrowdev_attr(attr); |
| 709 | |
| 710 | if (csrowdev_attr->store) |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 711 | return csrowdev_attr->store(csrow, |
| 712 | buffer, |
| 713 | count, |
| 714 | csrowdev_attr->private); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 715 | return -EIO; |
| 716 | } |
| 717 | |
| 718 | static struct sysfs_ops csrowfs_ops = { |
| 719 | .show = csrowdev_show, |
| 720 | .store = csrowdev_store |
| 721 | }; |
| 722 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 723 | #define CSROWDEV_ATTR(_name,_mode,_show,_store,_private) \ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 724 | struct csrowdev_attribute attr_##_name = { \ |
| 725 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 726 | .show = _show, \ |
| 727 | .store = _store, \ |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 728 | .private = _private, \ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 729 | }; |
| 730 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 731 | /* default cwrow<id>/attribute files */ |
| 732 | CSROWDEV_ATTR(size_mb,S_IRUGO,csrow_size_show,NULL,0); |
| 733 | CSROWDEV_ATTR(dev_type,S_IRUGO,csrow_dev_type_show,NULL,0); |
| 734 | CSROWDEV_ATTR(mem_type,S_IRUGO,csrow_mem_type_show,NULL,0); |
| 735 | CSROWDEV_ATTR(edac_mode,S_IRUGO,csrow_edac_mode_show,NULL,0); |
| 736 | CSROWDEV_ATTR(ue_count,S_IRUGO,csrow_ue_count_show,NULL,0); |
| 737 | CSROWDEV_ATTR(ce_count,S_IRUGO,csrow_ce_count_show,NULL,0); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 738 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 739 | /* default attributes of the CSROW<id> object */ |
| 740 | static struct csrowdev_attribute *default_csrow_attr[] = { |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 741 | &attr_dev_type, |
| 742 | &attr_mem_type, |
| 743 | &attr_edac_mode, |
| 744 | &attr_size_mb, |
| 745 | &attr_ue_count, |
| 746 | &attr_ce_count, |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 747 | NULL, |
| 748 | }; |
| 749 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 750 | |
| 751 | /* possible dynamic channel DIMM Label attribute files */ |
| 752 | CSROWDEV_ATTR(ch0_dimm_label,S_IRUGO|S_IWUSR, |
| 753 | channel_dimm_label_show, |
| 754 | channel_dimm_label_store, |
| 755 | 0 ); |
| 756 | CSROWDEV_ATTR(ch1_dimm_label,S_IRUGO|S_IWUSR, |
| 757 | channel_dimm_label_show, |
| 758 | channel_dimm_label_store, |
| 759 | 1 ); |
| 760 | CSROWDEV_ATTR(ch2_dimm_label,S_IRUGO|S_IWUSR, |
| 761 | channel_dimm_label_show, |
| 762 | channel_dimm_label_store, |
| 763 | 2 ); |
| 764 | CSROWDEV_ATTR(ch3_dimm_label,S_IRUGO|S_IWUSR, |
| 765 | channel_dimm_label_show, |
| 766 | channel_dimm_label_store, |
| 767 | 3 ); |
| 768 | CSROWDEV_ATTR(ch4_dimm_label,S_IRUGO|S_IWUSR, |
| 769 | channel_dimm_label_show, |
| 770 | channel_dimm_label_store, |
| 771 | 4 ); |
| 772 | CSROWDEV_ATTR(ch5_dimm_label,S_IRUGO|S_IWUSR, |
| 773 | channel_dimm_label_show, |
| 774 | channel_dimm_label_store, |
| 775 | 5 ); |
| 776 | |
| 777 | /* Total possible dynamic DIMM Label attribute file table */ |
| 778 | static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = { |
| 779 | &attr_ch0_dimm_label, |
| 780 | &attr_ch1_dimm_label, |
| 781 | &attr_ch2_dimm_label, |
| 782 | &attr_ch3_dimm_label, |
| 783 | &attr_ch4_dimm_label, |
| 784 | &attr_ch5_dimm_label |
| 785 | }; |
| 786 | |
| 787 | /* possible dynamic channel ce_count attribute files */ |
| 788 | CSROWDEV_ATTR(ch0_ce_count,S_IRUGO|S_IWUSR, |
| 789 | channel_ce_count_show, |
| 790 | NULL, |
| 791 | 0 ); |
| 792 | CSROWDEV_ATTR(ch1_ce_count,S_IRUGO|S_IWUSR, |
| 793 | channel_ce_count_show, |
| 794 | NULL, |
| 795 | 1 ); |
| 796 | CSROWDEV_ATTR(ch2_ce_count,S_IRUGO|S_IWUSR, |
| 797 | channel_ce_count_show, |
| 798 | NULL, |
| 799 | 2 ); |
| 800 | CSROWDEV_ATTR(ch3_ce_count,S_IRUGO|S_IWUSR, |
| 801 | channel_ce_count_show, |
| 802 | NULL, |
| 803 | 3 ); |
| 804 | CSROWDEV_ATTR(ch4_ce_count,S_IRUGO|S_IWUSR, |
| 805 | channel_ce_count_show, |
| 806 | NULL, |
| 807 | 4 ); |
| 808 | CSROWDEV_ATTR(ch5_ce_count,S_IRUGO|S_IWUSR, |
| 809 | channel_ce_count_show, |
| 810 | NULL, |
| 811 | 5 ); |
| 812 | |
| 813 | /* Total possible dynamic ce_count attribute file table */ |
| 814 | static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = { |
| 815 | &attr_ch0_ce_count, |
| 816 | &attr_ch1_ce_count, |
| 817 | &attr_ch2_ce_count, |
| 818 | &attr_ch3_ce_count, |
| 819 | &attr_ch4_ce_count, |
| 820 | &attr_ch5_ce_count |
| 821 | }; |
| 822 | |
| 823 | |
| 824 | #define EDAC_NR_CHANNELS 6 |
| 825 | |
| 826 | /* Create dynamic CHANNEL files, indexed by 'chan', under specifed CSROW */ |
| 827 | static int edac_create_channel_files(struct kobject *kobj, int chan) |
| 828 | { |
| 829 | int err=-ENODEV; |
| 830 | |
| 831 | if (chan >= EDAC_NR_CHANNELS) |
| 832 | return err; |
| 833 | |
| 834 | /* create the DIMM label attribute file */ |
| 835 | err = sysfs_create_file(kobj, |
| 836 | (struct attribute *) dynamic_csrow_dimm_attr[chan]); |
| 837 | |
| 838 | if (!err) { |
| 839 | /* create the CE Count attribute file */ |
| 840 | err = sysfs_create_file(kobj, |
| 841 | (struct attribute *) dynamic_csrow_ce_count_attr[chan]); |
| 842 | } else { |
| 843 | debugf1("%s() dimm labels and ce_count files created", __func__); |
| 844 | } |
| 845 | |
| 846 | return err; |
| 847 | } |
| 848 | |
| 849 | /* No memory to release for this kobj */ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 850 | static void edac_csrow_instance_release(struct kobject *kobj) |
| 851 | { |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 852 | struct csrow_info *cs; |
| 853 | |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 854 | cs = container_of(kobj, struct csrow_info, kobj); |
| 855 | complete(&cs->kobj_complete); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 856 | } |
| 857 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 858 | /* the kobj_type instance for a CSROW */ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 859 | static struct kobj_type ktype_csrow = { |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 860 | .release = edac_csrow_instance_release, |
| 861 | .sysfs_ops = &csrowfs_ops, |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 862 | .default_attrs = (struct attribute **) default_csrow_attr, |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 863 | }; |
| 864 | |
| 865 | /* Create a CSROW object under specifed edac_mc_device */ |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 866 | static int edac_create_csrow_object( |
| 867 | struct kobject *edac_mci_kobj, |
| 868 | struct csrow_info *csrow, |
| 869 | int index) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 870 | { |
| 871 | int err = 0; |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 872 | int chan; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 873 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 874 | memset(&csrow->kobj, 0, sizeof(csrow->kobj)); |
| 875 | |
| 876 | /* generate ..../edac/mc/mc<id>/csrow<index> */ |
| 877 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 878 | csrow->kobj.parent = edac_mci_kobj; |
| 879 | csrow->kobj.ktype = &ktype_csrow; |
| 880 | |
| 881 | /* name this instance of csrow<id> */ |
| 882 | err = kobject_set_name(&csrow->kobj,"csrow%d",index); |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 883 | if (err) |
| 884 | goto error_exit; |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 885 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 886 | /* Instanstiate the csrow object */ |
| 887 | err = kobject_register(&csrow->kobj); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 888 | if (!err) { |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 889 | /* Create the dyanmic attribute files on this csrow, |
| 890 | * namely, the DIMM labels and the channel ce_count |
| 891 | */ |
| 892 | for (chan = 0; chan < csrow->nr_channels; chan++) { |
| 893 | err = edac_create_channel_files(&csrow->kobj,chan); |
| 894 | if (err) |
| 895 | break; |
| 896 | } |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 897 | } |
| 898 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 899 | error_exit: |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 900 | return err; |
| 901 | } |
| 902 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 903 | /* default sysfs methods and data structures for the main MCI kobject */ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 904 | |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 905 | static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci, |
| 906 | const char *data, size_t count) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 907 | { |
| 908 | int row, chan; |
| 909 | |
| 910 | mci->ue_noinfo_count = 0; |
| 911 | mci->ce_noinfo_count = 0; |
| 912 | mci->ue_count = 0; |
| 913 | mci->ce_count = 0; |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 914 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 915 | for (row = 0; row < mci->nr_csrows; row++) { |
| 916 | struct csrow_info *ri = &mci->csrows[row]; |
| 917 | |
| 918 | ri->ue_count = 0; |
| 919 | ri->ce_count = 0; |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 920 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 921 | for (chan = 0; chan < ri->nr_channels; chan++) |
| 922 | ri->channels[chan].ce_count = 0; |
| 923 | } |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 924 | |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 925 | mci->start_time = jiffies; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 926 | return count; |
| 927 | } |
| 928 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 929 | /* default attribute files for the MCI object */ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 930 | static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data) |
| 931 | { |
| 932 | return sprintf(data,"%d\n", mci->ue_count); |
| 933 | } |
| 934 | |
| 935 | static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data) |
| 936 | { |
| 937 | return sprintf(data,"%d\n", mci->ce_count); |
| 938 | } |
| 939 | |
| 940 | static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data) |
| 941 | { |
| 942 | return sprintf(data,"%d\n", mci->ce_noinfo_count); |
| 943 | } |
| 944 | |
| 945 | static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data) |
| 946 | { |
| 947 | return sprintf(data,"%d\n", mci->ue_noinfo_count); |
| 948 | } |
| 949 | |
| 950 | static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data) |
| 951 | { |
| 952 | return sprintf(data,"%ld\n", (jiffies - mci->start_time) / HZ); |
| 953 | } |
| 954 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 955 | static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data) |
| 956 | { |
| 957 | return sprintf(data,"%s\n", mci->ctl_name); |
| 958 | } |
| 959 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 960 | static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data) |
| 961 | { |
| 962 | int total_pages, csrow_idx; |
| 963 | |
| 964 | for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows; |
| 965 | csrow_idx++) { |
| 966 | struct csrow_info *csrow = &mci->csrows[csrow_idx]; |
| 967 | |
| 968 | if (!csrow->nr_pages) |
| 969 | continue; |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 970 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 971 | total_pages += csrow->nr_pages; |
| 972 | } |
| 973 | |
| 974 | return sprintf(data,"%u\n", PAGES_TO_MiB(total_pages)); |
| 975 | } |
| 976 | |
| 977 | struct mcidev_attribute { |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 978 | struct attribute attr; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 979 | ssize_t (*show)(struct mem_ctl_info *,char *); |
| 980 | ssize_t (*store)(struct mem_ctl_info *, const char *,size_t); |
| 981 | }; |
| 982 | |
| 983 | #define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj) |
| 984 | #define to_mcidev_attr(a) container_of(a, struct mcidev_attribute, attr) |
| 985 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 986 | /* MCI show/store functions for top most object */ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 987 | static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr, |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 988 | char *buffer) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 989 | { |
| 990 | struct mem_ctl_info *mem_ctl_info = to_mci(kobj); |
| 991 | struct mcidev_attribute * mcidev_attr = to_mcidev_attr(attr); |
| 992 | |
| 993 | if (mcidev_attr->show) |
| 994 | return mcidev_attr->show(mem_ctl_info, buffer); |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 995 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 996 | return -EIO; |
| 997 | } |
| 998 | |
| 999 | static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr, |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1000 | const char *buffer, size_t count) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1001 | { |
| 1002 | struct mem_ctl_info *mem_ctl_info = to_mci(kobj); |
| 1003 | struct mcidev_attribute * mcidev_attr = to_mcidev_attr(attr); |
| 1004 | |
| 1005 | if (mcidev_attr->store) |
| 1006 | return mcidev_attr->store(mem_ctl_info, buffer, count); |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1007 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1008 | return -EIO; |
| 1009 | } |
| 1010 | |
| 1011 | static struct sysfs_ops mci_ops = { |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1012 | .show = mcidev_show, |
| 1013 | .store = mcidev_store |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1014 | }; |
| 1015 | |
| 1016 | #define MCIDEV_ATTR(_name,_mode,_show,_store) \ |
| 1017 | struct mcidev_attribute mci_attr_##_name = { \ |
| 1018 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 1019 | .show = _show, \ |
| 1020 | .store = _store, \ |
| 1021 | }; |
| 1022 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 1023 | /* default Control file */ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1024 | MCIDEV_ATTR(reset_counters,S_IWUSR,NULL,mci_reset_counters_store); |
| 1025 | |
Doug Thompson | 49c0dab7 | 2006-07-10 04:45:19 -0700 | [diff] [blame] | 1026 | /* default Attribute files */ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1027 | MCIDEV_ATTR(mc_name,S_IRUGO,mci_ctl_name_show,NULL); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1028 | MCIDEV_ATTR(size_mb,S_IRUGO,mci_size_mb_show,NULL); |
| 1029 | MCIDEV_ATTR(seconds_since_reset,S_IRUGO,mci_seconds_show,NULL); |
| 1030 | MCIDEV_ATTR(ue_noinfo_count,S_IRUGO,mci_ue_noinfo_show,NULL); |
| 1031 | MCIDEV_ATTR(ce_noinfo_count,S_IRUGO,mci_ce_noinfo_show,NULL); |
| 1032 | MCIDEV_ATTR(ue_count,S_IRUGO,mci_ue_count_show,NULL); |
| 1033 | MCIDEV_ATTR(ce_count,S_IRUGO,mci_ce_count_show,NULL); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1034 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1035 | static struct mcidev_attribute *mci_attr[] = { |
| 1036 | &mci_attr_reset_counters, |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1037 | &mci_attr_mc_name, |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1038 | &mci_attr_size_mb, |
| 1039 | &mci_attr_seconds_since_reset, |
| 1040 | &mci_attr_ue_noinfo_count, |
| 1041 | &mci_attr_ce_noinfo_count, |
| 1042 | &mci_attr_ue_count, |
| 1043 | &mci_attr_ce_count, |
| 1044 | NULL |
| 1045 | }; |
| 1046 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1047 | /* |
| 1048 | * Release of a MC controlling instance |
| 1049 | */ |
| 1050 | static void edac_mci_instance_release(struct kobject *kobj) |
| 1051 | { |
| 1052 | struct mem_ctl_info *mci; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1053 | |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 1054 | mci = to_mci(kobj); |
| 1055 | debugf0("%s() idx=%d\n", __func__, mci->mc_idx); |
| 1056 | complete(&mci->kobj_complete); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1057 | } |
| 1058 | |
| 1059 | static struct kobj_type ktype_mci = { |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1060 | .release = edac_mci_instance_release, |
| 1061 | .sysfs_ops = &mci_ops, |
| 1062 | .default_attrs = (struct attribute **) mci_attr, |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1063 | }; |
| 1064 | |
Dave Peterson | ceb2ca9 | 2006-03-13 21:20:50 -0800 | [diff] [blame] | 1065 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1066 | #define EDAC_DEVICE_SYMLINK "device" |
| 1067 | |
| 1068 | /* |
| 1069 | * Create a new Memory Controller kobject instance, |
| 1070 | * mc<id> under the 'mc' directory |
| 1071 | * |
| 1072 | * Return: |
| 1073 | * 0 Success |
| 1074 | * !0 Failure |
| 1075 | */ |
| 1076 | static int edac_create_sysfs_mci_device(struct mem_ctl_info *mci) |
| 1077 | { |
| 1078 | int i; |
| 1079 | int err; |
| 1080 | struct csrow_info *csrow; |
| 1081 | struct kobject *edac_mci_kobj=&mci->edac_mci_kobj; |
| 1082 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1083 | debugf0("%s() idx=%d\n", __func__, mci->mc_idx); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1084 | memset(edac_mci_kobj, 0, sizeof(*edac_mci_kobj)); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1085 | |
| 1086 | /* set the name of the mc<id> object */ |
| 1087 | err = kobject_set_name(edac_mci_kobj,"mc%d",mci->mc_idx); |
| 1088 | if (err) |
| 1089 | return err; |
| 1090 | |
| 1091 | /* link to our parent the '..../edac/mc' object */ |
| 1092 | edac_mci_kobj->parent = &edac_memctrl_kobj; |
| 1093 | edac_mci_kobj->ktype = &ktype_mci; |
| 1094 | |
| 1095 | /* register the mc<id> kobject */ |
| 1096 | err = kobject_register(edac_mci_kobj); |
| 1097 | if (err) |
| 1098 | return err; |
| 1099 | |
| 1100 | /* create a symlink for the device */ |
Doug Thompson | 37f0458 | 2006-06-30 01:56:07 -0700 | [diff] [blame] | 1101 | err = sysfs_create_link(edac_mci_kobj, &mci->dev->kobj, |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1102 | EDAC_DEVICE_SYMLINK); |
Dave Peterson | 6e5a874 | 2006-03-26 01:38:48 -0800 | [diff] [blame] | 1103 | if (err) |
| 1104 | goto fail0; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1105 | |
| 1106 | /* Make directories for each CSROW object |
| 1107 | * under the mc<id> kobject |
| 1108 | */ |
| 1109 | for (i = 0; i < mci->nr_csrows; i++) { |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1110 | csrow = &mci->csrows[i]; |
| 1111 | |
| 1112 | /* Only expose populated CSROWs */ |
| 1113 | if (csrow->nr_pages > 0) { |
| 1114 | err = edac_create_csrow_object(edac_mci_kobj,csrow,i); |
| 1115 | if (err) |
Dave Peterson | 6e5a874 | 2006-03-26 01:38:48 -0800 | [diff] [blame] | 1116 | goto fail1; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1117 | } |
| 1118 | } |
| 1119 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1120 | return 0; |
| 1121 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1122 | /* CSROW error: backout what has already been registered, */ |
Dave Peterson | 6e5a874 | 2006-03-26 01:38:48 -0800 | [diff] [blame] | 1123 | fail1: |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1124 | for ( i--; i >= 0; i--) { |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 1125 | if (csrow->nr_pages > 0) { |
| 1126 | init_completion(&csrow->kobj_complete); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1127 | kobject_unregister(&mci->csrows[i].kobj); |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 1128 | wait_for_completion(&csrow->kobj_complete); |
| 1129 | } |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1130 | } |
| 1131 | |
Dave Peterson | 6e5a874 | 2006-03-26 01:38:48 -0800 | [diff] [blame] | 1132 | fail0: |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 1133 | init_completion(&mci->kobj_complete); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1134 | kobject_unregister(edac_mci_kobj); |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 1135 | wait_for_completion(&mci->kobj_complete); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1136 | return err; |
| 1137 | } |
| 1138 | |
| 1139 | /* |
| 1140 | * remove a Memory Controller instance |
| 1141 | */ |
| 1142 | static void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci) |
| 1143 | { |
| 1144 | int i; |
| 1145 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1146 | debugf0("%s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1147 | |
| 1148 | /* remove all csrow kobjects */ |
| 1149 | for (i = 0; i < mci->nr_csrows; i++) { |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 1150 | if (mci->csrows[i].nr_pages > 0) { |
| 1151 | init_completion(&mci->csrows[i].kobj_complete); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1152 | kobject_unregister(&mci->csrows[i].kobj); |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 1153 | wait_for_completion(&mci->csrows[i].kobj_complete); |
| 1154 | } |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1155 | } |
| 1156 | |
| 1157 | sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK); |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 1158 | init_completion(&mci->kobj_complete); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1159 | kobject_unregister(&mci->edac_mci_kobj); |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 1160 | wait_for_completion(&mci->kobj_complete); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1161 | } |
| 1162 | |
| 1163 | /* END OF sysfs data and methods */ |
| 1164 | |
| 1165 | #ifdef CONFIG_EDAC_DEBUG |
| 1166 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1167 | void edac_mc_dump_channel(struct channel_info *chan) |
| 1168 | { |
| 1169 | debugf4("\tchannel = %p\n", chan); |
| 1170 | debugf4("\tchannel->chan_idx = %d\n", chan->chan_idx); |
| 1171 | debugf4("\tchannel->ce_count = %d\n", chan->ce_count); |
| 1172 | debugf4("\tchannel->label = '%s'\n", chan->label); |
| 1173 | debugf4("\tchannel->csrow = %p\n\n", chan->csrow); |
| 1174 | } |
Dave Peterson | 9110540 | 2006-03-26 01:38:55 -0800 | [diff] [blame] | 1175 | EXPORT_SYMBOL_GPL(edac_mc_dump_channel); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1176 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1177 | void edac_mc_dump_csrow(struct csrow_info *csrow) |
| 1178 | { |
| 1179 | debugf4("\tcsrow = %p\n", csrow); |
| 1180 | debugf4("\tcsrow->csrow_idx = %d\n", csrow->csrow_idx); |
| 1181 | debugf4("\tcsrow->first_page = 0x%lx\n", |
| 1182 | csrow->first_page); |
| 1183 | debugf4("\tcsrow->last_page = 0x%lx\n", csrow->last_page); |
| 1184 | debugf4("\tcsrow->page_mask = 0x%lx\n", csrow->page_mask); |
| 1185 | debugf4("\tcsrow->nr_pages = 0x%x\n", csrow->nr_pages); |
| 1186 | debugf4("\tcsrow->nr_channels = %d\n", |
| 1187 | csrow->nr_channels); |
| 1188 | debugf4("\tcsrow->channels = %p\n", csrow->channels); |
| 1189 | debugf4("\tcsrow->mci = %p\n\n", csrow->mci); |
| 1190 | } |
Dave Peterson | 9110540 | 2006-03-26 01:38:55 -0800 | [diff] [blame] | 1191 | EXPORT_SYMBOL_GPL(edac_mc_dump_csrow); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1192 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1193 | void edac_mc_dump_mci(struct mem_ctl_info *mci) |
| 1194 | { |
| 1195 | debugf3("\tmci = %p\n", mci); |
| 1196 | debugf3("\tmci->mtype_cap = %lx\n", mci->mtype_cap); |
| 1197 | debugf3("\tmci->edac_ctl_cap = %lx\n", mci->edac_ctl_cap); |
| 1198 | debugf3("\tmci->edac_cap = %lx\n", mci->edac_cap); |
| 1199 | debugf4("\tmci->edac_check = %p\n", mci->edac_check); |
| 1200 | debugf3("\tmci->nr_csrows = %d, csrows = %p\n", |
| 1201 | mci->nr_csrows, mci->csrows); |
Doug Thompson | 37f0458 | 2006-06-30 01:56:07 -0700 | [diff] [blame] | 1202 | debugf3("\tdev = %p\n", mci->dev); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1203 | debugf3("\tmod_name:ctl_name = %s:%s\n", |
| 1204 | mci->mod_name, mci->ctl_name); |
| 1205 | debugf3("\tpvt_info = %p\n\n", mci->pvt_info); |
| 1206 | } |
Dave Peterson | 9110540 | 2006-03-26 01:38:55 -0800 | [diff] [blame] | 1207 | EXPORT_SYMBOL_GPL(edac_mc_dump_mci); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1208 | |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1209 | #endif /* CONFIG_EDAC_DEBUG */ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1210 | |
| 1211 | /* 'ptr' points to a possibly unaligned item X such that sizeof(X) is 'size'. |
| 1212 | * Adjust 'ptr' so that its alignment is at least as stringent as what the |
| 1213 | * compiler would provide for X and return the aligned result. |
| 1214 | * |
| 1215 | * If 'size' is a constant, the compiler will optimize this whole function |
| 1216 | * down to either a no-op or the addition of a constant to the value of 'ptr'. |
| 1217 | */ |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1218 | static inline char * align_ptr(void *ptr, unsigned size) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1219 | { |
| 1220 | unsigned align, r; |
| 1221 | |
| 1222 | /* Here we assume that the alignment of a "long long" is the most |
| 1223 | * stringent alignment that the compiler will ever provide by default. |
| 1224 | * As far as I know, this is a reasonable assumption. |
| 1225 | */ |
| 1226 | if (size > sizeof(long)) |
| 1227 | align = sizeof(long long); |
| 1228 | else if (size > sizeof(int)) |
| 1229 | align = sizeof(long); |
| 1230 | else if (size > sizeof(short)) |
| 1231 | align = sizeof(int); |
| 1232 | else if (size > sizeof(char)) |
| 1233 | align = sizeof(short); |
| 1234 | else |
| 1235 | return (char *) ptr; |
| 1236 | |
| 1237 | r = size % align; |
| 1238 | |
| 1239 | if (r == 0) |
| 1240 | return (char *) ptr; |
| 1241 | |
| 1242 | return (char *) (((unsigned long) ptr) + align - r); |
| 1243 | } |
| 1244 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1245 | /** |
| 1246 | * edac_mc_alloc: Allocate a struct mem_ctl_info structure |
| 1247 | * @size_pvt: size of private storage needed |
| 1248 | * @nr_csrows: Number of CWROWS needed for this MC |
| 1249 | * @nr_chans: Number of channels for the MC |
| 1250 | * |
| 1251 | * Everything is kmalloc'ed as one big chunk - more efficient. |
| 1252 | * Only can be used if all structures have the same lifetime - otherwise |
| 1253 | * you have to allocate and initialize your own structures. |
| 1254 | * |
| 1255 | * Use edac_mc_free() to free mc structures allocated by this function. |
| 1256 | * |
| 1257 | * Returns: |
| 1258 | * NULL allocation failed |
| 1259 | * struct mem_ctl_info pointer |
| 1260 | */ |
| 1261 | struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows, |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1262 | unsigned nr_chans) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1263 | { |
| 1264 | struct mem_ctl_info *mci; |
| 1265 | struct csrow_info *csi, *csrow; |
| 1266 | struct channel_info *chi, *chp, *chan; |
| 1267 | void *pvt; |
| 1268 | unsigned size; |
| 1269 | int row, chn; |
| 1270 | |
| 1271 | /* Figure out the offsets of the various items from the start of an mc |
| 1272 | * structure. We want the alignment of each item to be at least as |
| 1273 | * stringent as what the compiler would provide if we could simply |
| 1274 | * hardcode everything into a single struct. |
| 1275 | */ |
| 1276 | mci = (struct mem_ctl_info *) 0; |
| 1277 | csi = (struct csrow_info *)align_ptr(&mci[1], sizeof(*csi)); |
| 1278 | chi = (struct channel_info *) |
| 1279 | align_ptr(&csi[nr_csrows], sizeof(*chi)); |
| 1280 | pvt = align_ptr(&chi[nr_chans * nr_csrows], sz_pvt); |
| 1281 | size = ((unsigned long) pvt) + sz_pvt; |
| 1282 | |
| 1283 | if ((mci = kmalloc(size, GFP_KERNEL)) == NULL) |
| 1284 | return NULL; |
| 1285 | |
| 1286 | /* Adjust pointers so they point within the memory we just allocated |
| 1287 | * rather than an imaginary chunk of memory located at address 0. |
| 1288 | */ |
| 1289 | csi = (struct csrow_info *) (((char *) mci) + ((unsigned long) csi)); |
| 1290 | chi = (struct channel_info *) (((char *) mci) + ((unsigned long) chi)); |
| 1291 | pvt = sz_pvt ? (((char *) mci) + ((unsigned long) pvt)) : NULL; |
| 1292 | |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1293 | memset(mci, 0, size); /* clear all fields */ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1294 | mci->csrows = csi; |
| 1295 | mci->pvt_info = pvt; |
| 1296 | mci->nr_csrows = nr_csrows; |
| 1297 | |
| 1298 | for (row = 0; row < nr_csrows; row++) { |
| 1299 | csrow = &csi[row]; |
| 1300 | csrow->csrow_idx = row; |
| 1301 | csrow->mci = mci; |
| 1302 | csrow->nr_channels = nr_chans; |
| 1303 | chp = &chi[row * nr_chans]; |
| 1304 | csrow->channels = chp; |
| 1305 | |
| 1306 | for (chn = 0; chn < nr_chans; chn++) { |
| 1307 | chan = &chp[chn]; |
| 1308 | chan->chan_idx = chn; |
| 1309 | chan->csrow = csrow; |
| 1310 | } |
| 1311 | } |
| 1312 | |
| 1313 | return mci; |
| 1314 | } |
Dave Peterson | 9110540 | 2006-03-26 01:38:55 -0800 | [diff] [blame] | 1315 | EXPORT_SYMBOL_GPL(edac_mc_alloc); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1316 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1317 | /** |
| 1318 | * edac_mc_free: Free a previously allocated 'mci' structure |
| 1319 | * @mci: pointer to a struct mem_ctl_info structure |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1320 | */ |
| 1321 | void edac_mc_free(struct mem_ctl_info *mci) |
| 1322 | { |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 1323 | kfree(mci); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1324 | } |
Dave Peterson | 9110540 | 2006-03-26 01:38:55 -0800 | [diff] [blame] | 1325 | EXPORT_SYMBOL_GPL(edac_mc_free); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1326 | |
Doug Thompson | 37f0458 | 2006-06-30 01:56:07 -0700 | [diff] [blame] | 1327 | static struct mem_ctl_info *find_mci_by_dev(struct device *dev) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1328 | { |
| 1329 | struct mem_ctl_info *mci; |
| 1330 | struct list_head *item; |
| 1331 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1332 | debugf3("%s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1333 | |
| 1334 | list_for_each(item, &mc_devices) { |
| 1335 | mci = list_entry(item, struct mem_ctl_info, link); |
| 1336 | |
Doug Thompson | 37f0458 | 2006-06-30 01:56:07 -0700 | [diff] [blame] | 1337 | if (mci->dev == dev) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1338 | return mci; |
| 1339 | } |
| 1340 | |
| 1341 | return NULL; |
| 1342 | } |
| 1343 | |
Doug Thompson | 2d7bbb9 | 2006-06-30 01:56:08 -0700 | [diff] [blame] | 1344 | /* Return 0 on success, 1 on failure. |
| 1345 | * Before calling this function, caller must |
| 1346 | * assign a unique value to mci->mc_idx. |
| 1347 | */ |
| 1348 | static int add_mc_to_global_list (struct mem_ctl_info *mci) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1349 | { |
| 1350 | struct list_head *item, *insert_before; |
| 1351 | struct mem_ctl_info *p; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1352 | |
Doug Thompson | 2d7bbb9 | 2006-06-30 01:56:08 -0700 | [diff] [blame] | 1353 | insert_before = &mc_devices; |
| 1354 | |
| 1355 | if (unlikely((p = find_mci_by_dev(mci->dev)) != NULL)) |
| 1356 | goto fail0; |
| 1357 | |
| 1358 | list_for_each(item, &mc_devices) { |
| 1359 | p = list_entry(item, struct mem_ctl_info, link); |
| 1360 | |
| 1361 | if (p->mc_idx >= mci->mc_idx) { |
| 1362 | if (unlikely(p->mc_idx == mci->mc_idx)) |
| 1363 | goto fail1; |
| 1364 | |
| 1365 | insert_before = item; |
| 1366 | break; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1367 | } |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1368 | } |
| 1369 | |
| 1370 | list_add_tail_rcu(&mci->link, insert_before); |
| 1371 | return 0; |
Doug Thompson | 2d7bbb9 | 2006-06-30 01:56:08 -0700 | [diff] [blame] | 1372 | |
| 1373 | fail0: |
| 1374 | edac_printk(KERN_WARNING, EDAC_MC, |
| 1375 | "%s (%s) %s %s already assigned %d\n", p->dev->bus_id, |
| 1376 | dev_name(p->dev), p->mod_name, p->ctl_name, p->mc_idx); |
| 1377 | return 1; |
| 1378 | |
| 1379 | fail1: |
| 1380 | edac_printk(KERN_WARNING, EDAC_MC, |
| 1381 | "bug in low-level driver: attempt to assign\n" |
| 1382 | " duplicate mc_idx %d in %s()\n", p->mc_idx, __func__); |
| 1383 | return 1; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1384 | } |
| 1385 | |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1386 | static void complete_mc_list_del(struct rcu_head *head) |
Dave Peterson | a1d03fc | 2006-03-26 01:38:46 -0800 | [diff] [blame] | 1387 | { |
| 1388 | struct mem_ctl_info *mci; |
| 1389 | |
| 1390 | mci = container_of(head, struct mem_ctl_info, rcu); |
| 1391 | INIT_LIST_HEAD(&mci->link); |
| 1392 | complete(&mci->complete); |
| 1393 | } |
| 1394 | |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1395 | static void del_mc_from_global_list(struct mem_ctl_info *mci) |
Dave Peterson | a1d03fc | 2006-03-26 01:38:46 -0800 | [diff] [blame] | 1396 | { |
| 1397 | list_del_rcu(&mci->link); |
| 1398 | init_completion(&mci->complete); |
| 1399 | call_rcu(&mci->rcu, complete_mc_list_del); |
| 1400 | wait_for_completion(&mci->complete); |
| 1401 | } |
| 1402 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1403 | /** |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 1404 | * edac_mc_add_mc: Insert the 'mci' structure into the mci global list and |
| 1405 | * create sysfs entries associated with mci structure |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1406 | * @mci: pointer to the mci structure to be added to the list |
Doug Thompson | 2d7bbb9 | 2006-06-30 01:56:08 -0700 | [diff] [blame] | 1407 | * @mc_idx: A unique numeric identifier to be assigned to the 'mci' structure. |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1408 | * |
| 1409 | * Return: |
| 1410 | * 0 Success |
| 1411 | * !0 Failure |
| 1412 | */ |
| 1413 | |
| 1414 | /* FIXME - should a warning be printed if no error detection? correction? */ |
Doug Thompson | 2d7bbb9 | 2006-06-30 01:56:08 -0700 | [diff] [blame] | 1415 | int edac_mc_add_mc(struct mem_ctl_info *mci, int mc_idx) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1416 | { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1417 | debugf0("%s()\n", __func__); |
Doug Thompson | 2d7bbb9 | 2006-06-30 01:56:08 -0700 | [diff] [blame] | 1418 | mci->mc_idx = mc_idx; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1419 | #ifdef CONFIG_EDAC_DEBUG |
| 1420 | if (edac_debug_level >= 3) |
| 1421 | edac_mc_dump_mci(mci); |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1422 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1423 | if (edac_debug_level >= 4) { |
| 1424 | int i; |
| 1425 | |
| 1426 | for (i = 0; i < mci->nr_csrows; i++) { |
| 1427 | int j; |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1428 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1429 | edac_mc_dump_csrow(&mci->csrows[i]); |
| 1430 | for (j = 0; j < mci->csrows[i].nr_channels; j++) |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1431 | edac_mc_dump_channel( |
| 1432 | &mci->csrows[i].channels[j]); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1433 | } |
| 1434 | } |
| 1435 | #endif |
| 1436 | down(&mem_ctls_mutex); |
| 1437 | |
| 1438 | if (add_mc_to_global_list(mci)) |
Dave Peterson | 028a7b6 | 2006-03-26 01:38:47 -0800 | [diff] [blame] | 1439 | goto fail0; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1440 | |
| 1441 | /* set load time so that error rate can be tracked */ |
| 1442 | mci->start_time = jiffies; |
| 1443 | |
| 1444 | if (edac_create_sysfs_mci_device(mci)) { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1445 | edac_mc_printk(mci, KERN_WARNING, |
| 1446 | "failed to create sysfs device\n"); |
Dave Peterson | 028a7b6 | 2006-03-26 01:38:47 -0800 | [diff] [blame] | 1447 | goto fail1; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1448 | } |
| 1449 | |
| 1450 | /* Report action taken */ |
Doug Thompson | 37f0458 | 2006-06-30 01:56:07 -0700 | [diff] [blame] | 1451 | edac_mc_printk(mci, KERN_INFO, "Giving out device to %s %s: DEV %s\n", |
| 1452 | mci->mod_name, mci->ctl_name, dev_name(mci->dev)); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1453 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1454 | up(&mem_ctls_mutex); |
Dave Peterson | 028a7b6 | 2006-03-26 01:38:47 -0800 | [diff] [blame] | 1455 | return 0; |
| 1456 | |
| 1457 | fail1: |
| 1458 | del_mc_from_global_list(mci); |
| 1459 | |
| 1460 | fail0: |
| 1461 | up(&mem_ctls_mutex); |
| 1462 | return 1; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1463 | } |
Dave Peterson | 9110540 | 2006-03-26 01:38:55 -0800 | [diff] [blame] | 1464 | EXPORT_SYMBOL_GPL(edac_mc_add_mc); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1465 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1466 | /** |
Dave Peterson | 472678e | 2006-03-26 01:38:49 -0800 | [diff] [blame] | 1467 | * edac_mc_del_mc: Remove sysfs entries for specified mci structure and |
| 1468 | * remove mci structure from global list |
Doug Thompson | 37f0458 | 2006-06-30 01:56:07 -0700 | [diff] [blame] | 1469 | * @pdev: Pointer to 'struct device' representing mci structure to remove. |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1470 | * |
Dave Peterson | 18dbc33 | 2006-03-26 01:38:50 -0800 | [diff] [blame] | 1471 | * Return pointer to removed mci structure, or NULL if device not found. |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1472 | */ |
Doug Thompson | 37f0458 | 2006-06-30 01:56:07 -0700 | [diff] [blame] | 1473 | struct mem_ctl_info * edac_mc_del_mc(struct device *dev) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1474 | { |
Dave Peterson | 18dbc33 | 2006-03-26 01:38:50 -0800 | [diff] [blame] | 1475 | struct mem_ctl_info *mci; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1476 | |
Dave Peterson | 18dbc33 | 2006-03-26 01:38:50 -0800 | [diff] [blame] | 1477 | debugf0("MC: %s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1478 | down(&mem_ctls_mutex); |
Dave Peterson | 18dbc33 | 2006-03-26 01:38:50 -0800 | [diff] [blame] | 1479 | |
Doug Thompson | 37f0458 | 2006-06-30 01:56:07 -0700 | [diff] [blame] | 1480 | if ((mci = find_mci_by_dev(dev)) == NULL) { |
Dave Peterson | 18dbc33 | 2006-03-26 01:38:50 -0800 | [diff] [blame] | 1481 | up(&mem_ctls_mutex); |
| 1482 | return NULL; |
| 1483 | } |
| 1484 | |
| 1485 | edac_remove_sysfs_mci_device(mci); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1486 | del_mc_from_global_list(mci); |
Dave Peterson | 18dbc33 | 2006-03-26 01:38:50 -0800 | [diff] [blame] | 1487 | up(&mem_ctls_mutex); |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1488 | edac_printk(KERN_INFO, EDAC_MC, |
Doug Thompson | 37f0458 | 2006-06-30 01:56:07 -0700 | [diff] [blame] | 1489 | "Removed device %d for %s %s: DEV %s\n", mci->mc_idx, |
| 1490 | mci->mod_name, mci->ctl_name, dev_name(mci->dev)); |
Dave Peterson | 18dbc33 | 2006-03-26 01:38:50 -0800 | [diff] [blame] | 1491 | return mci; |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1492 | } |
Dave Peterson | 9110540 | 2006-03-26 01:38:55 -0800 | [diff] [blame] | 1493 | EXPORT_SYMBOL_GPL(edac_mc_del_mc); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1494 | |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1495 | void edac_mc_scrub_block(unsigned long page, unsigned long offset, u32 size) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1496 | { |
| 1497 | struct page *pg; |
| 1498 | void *virt_addr; |
| 1499 | unsigned long flags = 0; |
| 1500 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1501 | debugf3("%s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1502 | |
| 1503 | /* ECC error page was not in our memory. Ignore it. */ |
| 1504 | if(!pfn_valid(page)) |
| 1505 | return; |
| 1506 | |
| 1507 | /* Find the actual page structure then map it and fix */ |
| 1508 | pg = pfn_to_page(page); |
| 1509 | |
| 1510 | if (PageHighMem(pg)) |
| 1511 | local_irq_save(flags); |
| 1512 | |
| 1513 | virt_addr = kmap_atomic(pg, KM_BOUNCE_READ); |
| 1514 | |
| 1515 | /* Perform architecture specific atomic scrub operation */ |
| 1516 | atomic_scrub(virt_addr + offset, size); |
| 1517 | |
| 1518 | /* Unmap and complete */ |
| 1519 | kunmap_atomic(virt_addr, KM_BOUNCE_READ); |
| 1520 | |
| 1521 | if (PageHighMem(pg)) |
| 1522 | local_irq_restore(flags); |
| 1523 | } |
Dave Peterson | 9110540 | 2006-03-26 01:38:55 -0800 | [diff] [blame] | 1524 | EXPORT_SYMBOL_GPL(edac_mc_scrub_block); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1525 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1526 | /* FIXME - should return -1 */ |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1527 | int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci, unsigned long page) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1528 | { |
| 1529 | struct csrow_info *csrows = mci->csrows; |
| 1530 | int row, i; |
| 1531 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1532 | debugf1("MC%d: %s(): 0x%lx\n", mci->mc_idx, __func__, page); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1533 | row = -1; |
| 1534 | |
| 1535 | for (i = 0; i < mci->nr_csrows; i++) { |
| 1536 | struct csrow_info *csrow = &csrows[i]; |
| 1537 | |
| 1538 | if (csrow->nr_pages == 0) |
| 1539 | continue; |
| 1540 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1541 | debugf3("MC%d: %s(): first(0x%lx) page(0x%lx) last(0x%lx) " |
| 1542 | "mask(0x%lx)\n", mci->mc_idx, __func__, |
| 1543 | csrow->first_page, page, csrow->last_page, |
| 1544 | csrow->page_mask); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1545 | |
| 1546 | if ((page >= csrow->first_page) && |
| 1547 | (page <= csrow->last_page) && |
| 1548 | ((page & csrow->page_mask) == |
| 1549 | (csrow->first_page & csrow->page_mask))) { |
| 1550 | row = i; |
| 1551 | break; |
| 1552 | } |
| 1553 | } |
| 1554 | |
| 1555 | if (row == -1) |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1556 | edac_mc_printk(mci, KERN_ERR, |
| 1557 | "could not look up page error address %lx\n", |
| 1558 | (unsigned long) page); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1559 | |
| 1560 | return row; |
| 1561 | } |
Dave Peterson | 9110540 | 2006-03-26 01:38:55 -0800 | [diff] [blame] | 1562 | EXPORT_SYMBOL_GPL(edac_mc_find_csrow_by_page); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1563 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1564 | /* FIXME - setable log (warning/emerg) levels */ |
| 1565 | /* FIXME - integrate with evlog: http://evlog.sourceforge.net/ */ |
| 1566 | void edac_mc_handle_ce(struct mem_ctl_info *mci, |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1567 | unsigned long page_frame_number, unsigned long offset_in_page, |
| 1568 | unsigned long syndrome, int row, int channel, const char *msg) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1569 | { |
| 1570 | unsigned long remapped_page; |
| 1571 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1572 | debugf3("MC%d: %s()\n", mci->mc_idx, __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1573 | |
| 1574 | /* FIXME - maybe make panic on INTERNAL ERROR an option */ |
| 1575 | if (row >= mci->nr_csrows || row < 0) { |
| 1576 | /* something is wrong */ |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1577 | edac_mc_printk(mci, KERN_ERR, |
| 1578 | "INTERNAL ERROR: row out of range " |
| 1579 | "(%d >= %d)\n", row, mci->nr_csrows); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1580 | edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); |
| 1581 | return; |
| 1582 | } |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1583 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1584 | if (channel >= mci->csrows[row].nr_channels || channel < 0) { |
| 1585 | /* something is wrong */ |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1586 | edac_mc_printk(mci, KERN_ERR, |
| 1587 | "INTERNAL ERROR: channel out of range " |
| 1588 | "(%d >= %d)\n", channel, |
| 1589 | mci->csrows[row].nr_channels); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1590 | edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); |
| 1591 | return; |
| 1592 | } |
| 1593 | |
| 1594 | if (log_ce) |
| 1595 | /* FIXME - put in DIMM location */ |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1596 | edac_mc_printk(mci, KERN_WARNING, |
| 1597 | "CE page 0x%lx, offset 0x%lx, grain %d, syndrome " |
| 1598 | "0x%lx, row %d, channel %d, label \"%s\": %s\n", |
| 1599 | page_frame_number, offset_in_page, |
| 1600 | mci->csrows[row].grain, syndrome, row, channel, |
| 1601 | mci->csrows[row].channels[channel].label, msg); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1602 | |
| 1603 | mci->ce_count++; |
| 1604 | mci->csrows[row].ce_count++; |
| 1605 | mci->csrows[row].channels[channel].ce_count++; |
| 1606 | |
| 1607 | if (mci->scrub_mode & SCRUB_SW_SRC) { |
| 1608 | /* |
| 1609 | * Some MC's can remap memory so that it is still available |
| 1610 | * at a different address when PCI devices map into memory. |
| 1611 | * MC's that can't do this lose the memory where PCI devices |
| 1612 | * are mapped. This mapping is MC dependant and so we call |
| 1613 | * back into the MC driver for it to map the MC page to |
| 1614 | * a physical (CPU) page which can then be mapped to a virtual |
| 1615 | * page - which can then be scrubbed. |
| 1616 | */ |
| 1617 | remapped_page = mci->ctl_page_to_phys ? |
| 1618 | mci->ctl_page_to_phys(mci, page_frame_number) : |
| 1619 | page_frame_number; |
| 1620 | |
| 1621 | edac_mc_scrub_block(remapped_page, offset_in_page, |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1622 | mci->csrows[row].grain); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1623 | } |
| 1624 | } |
Dave Peterson | 9110540 | 2006-03-26 01:38:55 -0800 | [diff] [blame] | 1625 | EXPORT_SYMBOL_GPL(edac_mc_handle_ce); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1626 | |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1627 | void edac_mc_handle_ce_no_info(struct mem_ctl_info *mci, const char *msg) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1628 | { |
| 1629 | if (log_ce) |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1630 | edac_mc_printk(mci, KERN_WARNING, |
| 1631 | "CE - no information available: %s\n", msg); |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1632 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1633 | mci->ce_noinfo_count++; |
| 1634 | mci->ce_count++; |
| 1635 | } |
Dave Peterson | 9110540 | 2006-03-26 01:38:55 -0800 | [diff] [blame] | 1636 | EXPORT_SYMBOL_GPL(edac_mc_handle_ce_no_info); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1637 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1638 | void edac_mc_handle_ue(struct mem_ctl_info *mci, |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1639 | unsigned long page_frame_number, unsigned long offset_in_page, |
| 1640 | int row, const char *msg) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1641 | { |
| 1642 | int len = EDAC_MC_LABEL_LEN * 4; |
| 1643 | char labels[len + 1]; |
| 1644 | char *pos = labels; |
| 1645 | int chan; |
| 1646 | int chars; |
| 1647 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1648 | debugf3("MC%d: %s()\n", mci->mc_idx, __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1649 | |
| 1650 | /* FIXME - maybe make panic on INTERNAL ERROR an option */ |
| 1651 | if (row >= mci->nr_csrows || row < 0) { |
| 1652 | /* something is wrong */ |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1653 | edac_mc_printk(mci, KERN_ERR, |
| 1654 | "INTERNAL ERROR: row out of range " |
| 1655 | "(%d >= %d)\n", row, mci->nr_csrows); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1656 | edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR"); |
| 1657 | return; |
| 1658 | } |
| 1659 | |
| 1660 | chars = snprintf(pos, len + 1, "%s", |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1661 | mci->csrows[row].channels[0].label); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1662 | len -= chars; |
| 1663 | pos += chars; |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1664 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1665 | for (chan = 1; (chan < mci->csrows[row].nr_channels) && (len > 0); |
| 1666 | chan++) { |
| 1667 | chars = snprintf(pos, len + 1, ":%s", |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1668 | mci->csrows[row].channels[chan].label); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1669 | len -= chars; |
| 1670 | pos += chars; |
| 1671 | } |
| 1672 | |
| 1673 | if (log_ue) |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1674 | edac_mc_printk(mci, KERN_EMERG, |
| 1675 | "UE page 0x%lx, offset 0x%lx, grain %d, row %d, " |
| 1676 | "labels \"%s\": %s\n", page_frame_number, |
| 1677 | offset_in_page, mci->csrows[row].grain, row, labels, |
| 1678 | msg); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1679 | |
| 1680 | if (panic_on_ue) |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1681 | panic("EDAC MC%d: UE page 0x%lx, offset 0x%lx, grain %d, " |
| 1682 | "row %d, labels \"%s\": %s\n", mci->mc_idx, |
| 1683 | page_frame_number, offset_in_page, |
| 1684 | mci->csrows[row].grain, row, labels, msg); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1685 | |
| 1686 | mci->ue_count++; |
| 1687 | mci->csrows[row].ue_count++; |
| 1688 | } |
Dave Peterson | 9110540 | 2006-03-26 01:38:55 -0800 | [diff] [blame] | 1689 | EXPORT_SYMBOL_GPL(edac_mc_handle_ue); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1690 | |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1691 | void edac_mc_handle_ue_no_info(struct mem_ctl_info *mci, const char *msg) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1692 | { |
| 1693 | if (panic_on_ue) |
| 1694 | panic("EDAC MC%d: Uncorrected Error", mci->mc_idx); |
| 1695 | |
| 1696 | if (log_ue) |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1697 | edac_mc_printk(mci, KERN_WARNING, |
| 1698 | "UE - no information available: %s\n", msg); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1699 | mci->ue_noinfo_count++; |
| 1700 | mci->ue_count++; |
| 1701 | } |
Dave Peterson | 9110540 | 2006-03-26 01:38:55 -0800 | [diff] [blame] | 1702 | EXPORT_SYMBOL_GPL(edac_mc_handle_ue_no_info); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1703 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1704 | |
| 1705 | /* |
| 1706 | * Iterate over all MC instances and check for ECC, et al, errors |
| 1707 | */ |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1708 | static inline void check_mc_devices(void) |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1709 | { |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1710 | struct list_head *item; |
| 1711 | struct mem_ctl_info *mci; |
| 1712 | |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1713 | debugf3("%s()\n", __func__); |
Dave Peterson | 18dbc33 | 2006-03-26 01:38:50 -0800 | [diff] [blame] | 1714 | down(&mem_ctls_mutex); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1715 | |
| 1716 | list_for_each(item, &mc_devices) { |
| 1717 | mci = list_entry(item, struct mem_ctl_info, link); |
| 1718 | |
| 1719 | if (mci->edac_check != NULL) |
| 1720 | mci->edac_check(mci); |
| 1721 | } |
| 1722 | |
Dave Peterson | 18dbc33 | 2006-03-26 01:38:50 -0800 | [diff] [blame] | 1723 | up(&mem_ctls_mutex); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1724 | } |
| 1725 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1726 | /* |
| 1727 | * Check MC status every poll_msec. |
| 1728 | * Check PCI status every poll_msec as well. |
| 1729 | * |
| 1730 | * This where the work gets done for edac. |
| 1731 | * |
| 1732 | * SMP safe, doesn't use NMI, and auto-rate-limits. |
| 1733 | */ |
| 1734 | static void do_edac_check(void) |
| 1735 | { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1736 | debugf3("%s()\n", __func__); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1737 | check_mc_devices(); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1738 | do_pci_parity_check(); |
| 1739 | } |
| 1740 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1741 | static int edac_kernel_thread(void *arg) |
| 1742 | { |
Dave Peterson | f2fe42a | 2006-03-26 01:38:38 -0800 | [diff] [blame] | 1743 | while (!kthread_should_stop()) { |
| 1744 | do_edac_check(); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1745 | |
| 1746 | /* goto sleep for the interval */ |
Dave Peterson | f2fe42a | 2006-03-26 01:38:38 -0800 | [diff] [blame] | 1747 | schedule_timeout_interruptible((HZ * poll_msec) / 1000); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1748 | try_to_freeze(); |
| 1749 | } |
| 1750 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1751 | return 0; |
| 1752 | } |
| 1753 | |
| 1754 | /* |
| 1755 | * edac_mc_init |
| 1756 | * module initialization entry point |
| 1757 | */ |
| 1758 | static int __init edac_mc_init(void) |
| 1759 | { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1760 | edac_printk(KERN_INFO, EDAC_MC, EDAC_MC_VERSION "\n"); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1761 | |
| 1762 | /* |
| 1763 | * Harvest and clear any boot/initialization PCI parity errors |
| 1764 | * |
| 1765 | * FIXME: This only clears errors logged by devices present at time of |
| 1766 | * module initialization. We should also do an initial clear |
| 1767 | * of each newly hotplugged device. |
| 1768 | */ |
| 1769 | clear_pci_parity_errors(); |
| 1770 | |
Alexey Dobriyan | 7f927fc | 2006-03-28 01:56:53 -0800 | [diff] [blame] | 1771 | /* Create the MC sysfs entries */ |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1772 | if (edac_sysfs_memctrl_setup()) { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1773 | edac_printk(KERN_ERR, EDAC_MC, |
| 1774 | "Error initializing sysfs code\n"); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1775 | return -ENODEV; |
| 1776 | } |
| 1777 | |
| 1778 | /* Create the PCI parity sysfs entries */ |
| 1779 | if (edac_sysfs_pci_setup()) { |
| 1780 | edac_sysfs_memctrl_teardown(); |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1781 | edac_printk(KERN_ERR, EDAC_MC, |
| 1782 | "EDAC PCI: Error initializing sysfs code\n"); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1783 | return -ENODEV; |
| 1784 | } |
| 1785 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1786 | /* create our kernel thread */ |
Dave Peterson | f2fe42a | 2006-03-26 01:38:38 -0800 | [diff] [blame] | 1787 | edac_thread = kthread_run(edac_kernel_thread, NULL, "kedac"); |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1788 | |
Dave Peterson | f2fe42a | 2006-03-26 01:38:38 -0800 | [diff] [blame] | 1789 | if (IS_ERR(edac_thread)) { |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1790 | /* remove the sysfs entries */ |
| 1791 | edac_sysfs_memctrl_teardown(); |
| 1792 | edac_sysfs_pci_teardown(); |
Dave Peterson | f2fe42a | 2006-03-26 01:38:38 -0800 | [diff] [blame] | 1793 | return PTR_ERR(edac_thread); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1794 | } |
| 1795 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1796 | return 0; |
| 1797 | } |
| 1798 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1799 | /* |
| 1800 | * edac_mc_exit() |
| 1801 | * module exit/termination functioni |
| 1802 | */ |
| 1803 | static void __exit edac_mc_exit(void) |
| 1804 | { |
Dave Peterson | 537fba2 | 2006-03-26 01:38:40 -0800 | [diff] [blame] | 1805 | debugf0("%s()\n", __func__); |
Dave Peterson | f2fe42a | 2006-03-26 01:38:38 -0800 | [diff] [blame] | 1806 | kthread_stop(edac_thread); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1807 | |
| 1808 | /* tear down the sysfs device */ |
| 1809 | edac_sysfs_memctrl_teardown(); |
| 1810 | edac_sysfs_pci_teardown(); |
| 1811 | } |
| 1812 | |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1813 | module_init(edac_mc_init); |
| 1814 | module_exit(edac_mc_exit); |
| 1815 | |
| 1816 | MODULE_LICENSE("GPL"); |
| 1817 | MODULE_AUTHOR("Linux Networx (http://lnxi.com) Thayne Harbaugh et al\n" |
Dave Peterson | e7ecd89 | 2006-03-26 01:38:52 -0800 | [diff] [blame] | 1818 | "Based on work by Dan Hollis et al"); |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1819 | MODULE_DESCRIPTION("Core library routines for MC reporting"); |
| 1820 | |
| 1821 | module_param(panic_on_ue, int, 0644); |
| 1822 | MODULE_PARM_DESC(panic_on_ue, "Panic on uncorrected error: 0=off 1=on"); |
Doug Thompson | 37f0458 | 2006-06-30 01:56:07 -0700 | [diff] [blame] | 1823 | #ifdef CONFIG_PCI |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1824 | module_param(check_pci_parity, int, 0644); |
| 1825 | MODULE_PARM_DESC(check_pci_parity, "Check for PCI bus parity errors: 0=off 1=on"); |
| 1826 | module_param(panic_on_pci_parity, int, 0644); |
| 1827 | MODULE_PARM_DESC(panic_on_pci_parity, "Panic on PCI Bus Parity error: 0=off 1=on"); |
Doug Thompson | 37f0458 | 2006-06-30 01:56:07 -0700 | [diff] [blame] | 1828 | #endif |
Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1829 | module_param(log_ue, int, 0644); |
| 1830 | MODULE_PARM_DESC(log_ue, "Log uncorrectable error to console: 0=off 1=on"); |
| 1831 | module_param(log_ce, int, 0644); |
| 1832 | MODULE_PARM_DESC(log_ce, "Log correctable error to console: 0=off 1=on"); |
| 1833 | module_param(poll_msec, int, 0644); |
| 1834 | MODULE_PARM_DESC(poll_msec, "Polling period in milliseconds"); |
| 1835 | #ifdef CONFIG_EDAC_DEBUG |
| 1836 | module_param(edac_debug_level, int, 0644); |
| 1837 | MODULE_PARM_DESC(edac_debug_level, "Debug level"); |
| 1838 | #endif |