Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 1 | /* |
| 2 | * EDAC PCI component |
| 3 | * |
| 4 | * Author: Dave Jiang <djiang@mvista.com> |
| 5 | * |
| 6 | * 2007 (c) MontaVista Software, Inc. This file is licensed under |
| 7 | * the terms of the GNU General Public License version 2. This program |
| 8 | * is licensed "as is" without any warranty of any kind, whether express |
| 9 | * or implied. |
| 10 | * |
| 11 | */ |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/types.h> |
| 14 | #include <linux/smp.h> |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/sysctl.h> |
| 17 | #include <linux/highmem.h> |
| 18 | #include <linux/timer.h> |
| 19 | #include <linux/slab.h> |
| 20 | #include <linux/spinlock.h> |
| 21 | #include <linux/list.h> |
| 22 | #include <linux/sysdev.h> |
| 23 | #include <linux/ctype.h> |
| 24 | #include <linux/workqueue.h> |
| 25 | #include <asm/uaccess.h> |
| 26 | #include <asm/page.h> |
| 27 | |
| 28 | #include "edac_core.h" |
| 29 | #include "edac_module.h" |
| 30 | |
| 31 | static DEFINE_MUTEX(edac_pci_ctls_mutex); |
Robert P. J. Day | ff6ac2a | 2008-04-29 01:03:17 -0700 | [diff] [blame] | 32 | static LIST_HEAD(edac_pci_list); |
Harry Ciao | 8641a38 | 2009-04-02 16:58:47 -0700 | [diff] [blame] | 33 | static atomic_t pci_indexes = ATOMIC_INIT(0); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 34 | |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 35 | /* |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 36 | * edac_pci_alloc_ctl_info |
| 37 | * |
| 38 | * The alloc() function for the 'edac_pci' control info |
| 39 | * structure. The chip driver will allocate one of these for each |
| 40 | * edac_pci it is going to control/register with the EDAC CORE. |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 41 | */ |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 42 | struct edac_pci_ctl_info *edac_pci_alloc_ctl_info(unsigned int sz_pvt, |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 43 | const char *edac_pci_name) |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 44 | { |
| 45 | struct edac_pci_ctl_info *pci; |
| 46 | void *pvt; |
| 47 | unsigned int size; |
| 48 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 49 | debugf1("%s()\n", __func__); |
| 50 | |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 51 | pci = (struct edac_pci_ctl_info *)0; |
| 52 | pvt = edac_align_ptr(&pci[1], sz_pvt); |
| 53 | size = ((unsigned long)pvt) + sz_pvt; |
| 54 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 55 | /* Alloc the needed control struct memory */ |
| 56 | pci = kzalloc(size, GFP_KERNEL); |
| 57 | if (pci == NULL) |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 58 | return NULL; |
| 59 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 60 | /* Now much private space */ |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 61 | pvt = sz_pvt ? ((char *)pci) + ((unsigned long)pvt) : NULL; |
| 62 | |
| 63 | pci->pvt_info = pvt; |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 64 | pci->op_state = OP_ALLOC; |
| 65 | |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 66 | snprintf(pci->name, strlen(edac_pci_name) + 1, "%s", edac_pci_name); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 67 | |
| 68 | return pci; |
| 69 | } |
| 70 | EXPORT_SYMBOL_GPL(edac_pci_alloc_ctl_info); |
| 71 | |
| 72 | /* |
| 73 | * edac_pci_free_ctl_info() |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 74 | * |
| 75 | * Last action on the pci control structure. |
| 76 | * |
Joe Perches | 6f042b5 | 2008-02-03 17:12:34 +0200 | [diff] [blame] | 77 | * call the remove sysfs information, which will unregister |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 78 | * this control struct's kobj. When that kobj's ref count |
| 79 | * goes to zero, its release function will be call and then |
| 80 | * kfree() the memory. |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 81 | */ |
| 82 | void edac_pci_free_ctl_info(struct edac_pci_ctl_info *pci) |
| 83 | { |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 84 | debugf1("%s()\n", __func__); |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 85 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 86 | edac_pci_remove_sysfs(pci); |
| 87 | } |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 88 | EXPORT_SYMBOL_GPL(edac_pci_free_ctl_info); |
| 89 | |
| 90 | /* |
| 91 | * find_edac_pci_by_dev() |
| 92 | * scans the edac_pci list for a specific 'struct device *' |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 93 | * |
| 94 | * return NULL if not found, or return control struct pointer |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 95 | */ |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 96 | static struct edac_pci_ctl_info *find_edac_pci_by_dev(struct device *dev) |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 97 | { |
| 98 | struct edac_pci_ctl_info *pci; |
| 99 | struct list_head *item; |
| 100 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 101 | debugf1("%s()\n", __func__); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 102 | |
| 103 | list_for_each(item, &edac_pci_list) { |
| 104 | pci = list_entry(item, struct edac_pci_ctl_info, link); |
| 105 | |
| 106 | if (pci->dev == dev) |
| 107 | return pci; |
| 108 | } |
| 109 | |
| 110 | return NULL; |
| 111 | } |
| 112 | |
| 113 | /* |
| 114 | * add_edac_pci_to_global_list |
| 115 | * Before calling this function, caller must assign a unique value to |
| 116 | * edac_dev->pci_idx. |
| 117 | * Return: |
| 118 | * 0 on success |
| 119 | * 1 on failure |
| 120 | */ |
| 121 | static int add_edac_pci_to_global_list(struct edac_pci_ctl_info *pci) |
| 122 | { |
| 123 | struct list_head *item, *insert_before; |
| 124 | struct edac_pci_ctl_info *rover; |
| 125 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 126 | debugf1("%s()\n", __func__); |
| 127 | |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 128 | insert_before = &edac_pci_list; |
| 129 | |
| 130 | /* Determine if already on the list */ |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 131 | rover = find_edac_pci_by_dev(pci->dev); |
| 132 | if (unlikely(rover != NULL)) |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 133 | goto fail0; |
| 134 | |
| 135 | /* Insert in ascending order by 'pci_idx', so find position */ |
| 136 | list_for_each(item, &edac_pci_list) { |
| 137 | rover = list_entry(item, struct edac_pci_ctl_info, link); |
| 138 | |
| 139 | if (rover->pci_idx >= pci->pci_idx) { |
| 140 | if (unlikely(rover->pci_idx == pci->pci_idx)) |
| 141 | goto fail1; |
| 142 | |
| 143 | insert_before = item; |
| 144 | break; |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | list_add_tail_rcu(&pci->link, insert_before); |
| 149 | return 0; |
| 150 | |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 151 | fail0: |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 152 | edac_printk(KERN_WARNING, EDAC_PCI, |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 153 | "%s (%s) %s %s already assigned %d\n", |
Kay Sievers | 281efb1 | 2009-01-06 14:42:57 -0800 | [diff] [blame] | 154 | dev_name(rover->dev), edac_dev_name(rover), |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 155 | rover->mod_name, rover->ctl_name, rover->pci_idx); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 156 | return 1; |
| 157 | |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 158 | fail1: |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 159 | edac_printk(KERN_WARNING, EDAC_PCI, |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 160 | "but in low-level driver: attempt to assign\n" |
| 161 | "\tduplicate pci_idx %d in %s()\n", rover->pci_idx, |
| 162 | __func__); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 163 | return 1; |
| 164 | } |
| 165 | |
| 166 | /* |
| 167 | * complete_edac_pci_list_del |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 168 | * |
| 169 | * RCU completion callback to indicate item is deleted |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 170 | */ |
| 171 | static void complete_edac_pci_list_del(struct rcu_head *head) |
| 172 | { |
| 173 | struct edac_pci_ctl_info *pci; |
| 174 | |
| 175 | pci = container_of(head, struct edac_pci_ctl_info, rcu); |
| 176 | INIT_LIST_HEAD(&pci->link); |
| 177 | complete(&pci->complete); |
| 178 | } |
| 179 | |
| 180 | /* |
| 181 | * del_edac_pci_from_global_list |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 182 | * |
| 183 | * remove the PCI control struct from the global list |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 184 | */ |
| 185 | static void del_edac_pci_from_global_list(struct edac_pci_ctl_info *pci) |
| 186 | { |
| 187 | list_del_rcu(&pci->link); |
| 188 | init_completion(&pci->complete); |
| 189 | call_rcu(&pci->rcu, complete_edac_pci_list_del); |
| 190 | wait_for_completion(&pci->complete); |
| 191 | } |
| 192 | |
Adrian Bunk | 1a45027 | 2008-04-29 01:03:18 -0700 | [diff] [blame] | 193 | #if 0 |
| 194 | /* Older code, but might use in the future */ |
| 195 | |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 196 | /* |
| 197 | * edac_pci_find() |
| 198 | * Search for an edac_pci_ctl_info structure whose index is 'idx' |
| 199 | * |
| 200 | * If found, return a pointer to the structure |
| 201 | * Else return NULL. |
| 202 | * |
| 203 | * Caller must hold pci_ctls_mutex. |
| 204 | */ |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 205 | struct edac_pci_ctl_info *edac_pci_find(int idx) |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 206 | { |
| 207 | struct list_head *item; |
| 208 | struct edac_pci_ctl_info *pci; |
| 209 | |
| 210 | /* Iterage over list, looking for exact match of ID */ |
| 211 | list_for_each(item, &edac_pci_list) { |
| 212 | pci = list_entry(item, struct edac_pci_ctl_info, link); |
| 213 | |
| 214 | if (pci->pci_idx >= idx) { |
| 215 | if (pci->pci_idx == idx) |
| 216 | return pci; |
| 217 | |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 218 | /* not on list, so terminate early */ |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 219 | break; |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | return NULL; |
| 224 | } |
| 225 | EXPORT_SYMBOL_GPL(edac_pci_find); |
Adrian Bunk | 1a45027 | 2008-04-29 01:03:18 -0700 | [diff] [blame] | 226 | #endif |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 227 | |
| 228 | /* |
| 229 | * edac_pci_workq_function() |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 230 | * |
| 231 | * periodic function that performs the operation |
| 232 | * scheduled by a workq request, for a given PCI control struct |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 233 | */ |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 234 | static void edac_pci_workq_function(struct work_struct *work_req) |
| 235 | { |
| 236 | struct delayed_work *d_work = (struct delayed_work *)work_req; |
| 237 | struct edac_pci_ctl_info *pci = to_edac_pci_ctl_work(d_work); |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 238 | int msec; |
| 239 | unsigned long delay; |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 240 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 241 | debugf3("%s() checking\n", __func__); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 242 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 243 | mutex_lock(&edac_pci_ctls_mutex); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 244 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 245 | if (pci->op_state == OP_RUNNING_POLL) { |
| 246 | /* we might be in POLL mode, but there may NOT be a poll func |
| 247 | */ |
| 248 | if ((pci->edac_check != NULL) && edac_pci_get_check_errors()) |
| 249 | pci->edac_check(pci); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 250 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 251 | /* if we are on a one second period, then use round */ |
| 252 | msec = edac_pci_get_poll_msec(); |
| 253 | if (msec == 1000) |
Anton Blanchard | c2ae24c | 2008-02-07 00:14:51 -0800 | [diff] [blame] | 254 | delay = round_jiffies_relative(msecs_to_jiffies(msec)); |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 255 | else |
| 256 | delay = msecs_to_jiffies(msec); |
| 257 | |
| 258 | /* Reschedule only if we are in POLL mode */ |
| 259 | queue_delayed_work(edac_workqueue, &pci->work, delay); |
| 260 | } |
| 261 | |
| 262 | mutex_unlock(&edac_pci_ctls_mutex); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 263 | } |
| 264 | |
| 265 | /* |
| 266 | * edac_pci_workq_setup() |
| 267 | * initialize a workq item for this edac_pci instance |
| 268 | * passing in the new delay period in msec |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 269 | * |
| 270 | * locking model: |
| 271 | * called when 'edac_pci_ctls_mutex' is locked |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 272 | */ |
| 273 | static void edac_pci_workq_setup(struct edac_pci_ctl_info *pci, |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 274 | unsigned int msec) |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 275 | { |
| 276 | debugf0("%s()\n", __func__); |
| 277 | |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 278 | INIT_DELAYED_WORK(&pci->work, edac_pci_workq_function); |
Dave Jiang | 4de78c6 | 2007-07-19 01:49:54 -0700 | [diff] [blame] | 279 | queue_delayed_work(edac_workqueue, &pci->work, |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 280 | msecs_to_jiffies(edac_pci_get_poll_msec())); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 281 | } |
| 282 | |
| 283 | /* |
| 284 | * edac_pci_workq_teardown() |
| 285 | * stop the workq processing on this edac_pci instance |
| 286 | */ |
| 287 | static void edac_pci_workq_teardown(struct edac_pci_ctl_info *pci) |
| 288 | { |
| 289 | int status; |
| 290 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 291 | debugf0("%s()\n", __func__); |
| 292 | |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 293 | status = cancel_delayed_work(&pci->work); |
| 294 | if (status == 0) |
| 295 | flush_workqueue(edac_workqueue); |
| 296 | } |
| 297 | |
| 298 | /* |
| 299 | * edac_pci_reset_delay_period |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 300 | * |
| 301 | * called with a new period value for the workq period |
| 302 | * a) stop current workq timer |
| 303 | * b) restart workq timer with new value |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 304 | */ |
| 305 | void edac_pci_reset_delay_period(struct edac_pci_ctl_info *pci, |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 306 | unsigned long value) |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 307 | { |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 308 | debugf0("%s()\n", __func__); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 309 | |
| 310 | edac_pci_workq_teardown(pci); |
| 311 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 312 | /* need to lock for the setup */ |
| 313 | mutex_lock(&edac_pci_ctls_mutex); |
| 314 | |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 315 | edac_pci_workq_setup(pci, value); |
| 316 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 317 | mutex_unlock(&edac_pci_ctls_mutex); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 318 | } |
| 319 | EXPORT_SYMBOL_GPL(edac_pci_reset_delay_period); |
| 320 | |
| 321 | /* |
Harry Ciao | 8641a38 | 2009-04-02 16:58:47 -0700 | [diff] [blame] | 322 | * edac_pci_alloc_index: Allocate a unique PCI index number |
| 323 | * |
| 324 | * Return: |
| 325 | * allocated index number |
| 326 | * |
| 327 | */ |
| 328 | int edac_pci_alloc_index(void) |
| 329 | { |
| 330 | return atomic_inc_return(&pci_indexes) - 1; |
| 331 | } |
| 332 | EXPORT_SYMBOL_GPL(edac_pci_alloc_index); |
| 333 | |
| 334 | /* |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 335 | * edac_pci_add_device: Insert the 'edac_dev' structure into the |
| 336 | * edac_pci global list and create sysfs entries associated with |
| 337 | * edac_pci structure. |
| 338 | * @pci: pointer to the edac_device structure to be added to the list |
| 339 | * @edac_idx: A unique numeric identifier to be assigned to the |
| 340 | * 'edac_pci' structure. |
| 341 | * |
| 342 | * Return: |
| 343 | * 0 Success |
| 344 | * !0 Failure |
| 345 | */ |
| 346 | int edac_pci_add_device(struct edac_pci_ctl_info *pci, int edac_idx) |
| 347 | { |
| 348 | debugf0("%s()\n", __func__); |
| 349 | |
| 350 | pci->pci_idx = edac_idx; |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 351 | pci->start_time = jiffies; |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 352 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 353 | mutex_lock(&edac_pci_ctls_mutex); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 354 | |
| 355 | if (add_edac_pci_to_global_list(pci)) |
| 356 | goto fail0; |
| 357 | |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 358 | if (edac_pci_create_sysfs(pci)) { |
| 359 | edac_pci_printk(pci, KERN_WARNING, |
| 360 | "failed to create sysfs pci\n"); |
| 361 | goto fail1; |
| 362 | } |
| 363 | |
| 364 | if (pci->edac_check != NULL) { |
| 365 | pci->op_state = OP_RUNNING_POLL; |
| 366 | |
| 367 | edac_pci_workq_setup(pci, 1000); |
| 368 | } else { |
| 369 | pci->op_state = OP_RUNNING_INTERRUPT; |
| 370 | } |
| 371 | |
| 372 | edac_pci_printk(pci, KERN_INFO, |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 373 | "Giving out device to module '%s' controller '%s':" |
| 374 | " DEV '%s' (%s)\n", |
| 375 | pci->mod_name, |
| 376 | pci->ctl_name, |
Stephen Rothwell | 17aa7e0 | 2008-05-05 13:54:19 +1000 | [diff] [blame] | 377 | edac_dev_name(pci), edac_op_state_to_string(pci->op_state)); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 378 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 379 | mutex_unlock(&edac_pci_ctls_mutex); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 380 | return 0; |
| 381 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 382 | /* error unwind stack */ |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 383 | fail1: |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 384 | del_edac_pci_from_global_list(pci); |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 385 | fail0: |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 386 | mutex_unlock(&edac_pci_ctls_mutex); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 387 | return 1; |
| 388 | } |
| 389 | EXPORT_SYMBOL_GPL(edac_pci_add_device); |
| 390 | |
| 391 | /* |
| 392 | * edac_pci_del_device() |
| 393 | * Remove sysfs entries for specified edac_pci structure and |
| 394 | * then remove edac_pci structure from global list |
| 395 | * |
| 396 | * @dev: |
| 397 | * Pointer to 'struct device' representing edac_pci structure |
| 398 | * to remove |
| 399 | * |
| 400 | * Return: |
| 401 | * Pointer to removed edac_pci structure, |
| 402 | * or NULL if device not found |
| 403 | */ |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 404 | struct edac_pci_ctl_info *edac_pci_del_device(struct device *dev) |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 405 | { |
| 406 | struct edac_pci_ctl_info *pci; |
| 407 | |
| 408 | debugf0("%s()\n", __func__); |
| 409 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 410 | mutex_lock(&edac_pci_ctls_mutex); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 411 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 412 | /* ensure the control struct is on the global list |
| 413 | * if not, then leave |
| 414 | */ |
| 415 | pci = find_edac_pci_by_dev(dev); |
| 416 | if (pci == NULL) { |
| 417 | mutex_unlock(&edac_pci_ctls_mutex); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 418 | return NULL; |
| 419 | } |
| 420 | |
| 421 | pci->op_state = OP_OFFLINE; |
| 422 | |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 423 | del_edac_pci_from_global_list(pci); |
| 424 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 425 | mutex_unlock(&edac_pci_ctls_mutex); |
| 426 | |
| 427 | /* stop the workq timer */ |
| 428 | edac_pci_workq_teardown(pci); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 429 | |
| 430 | edac_printk(KERN_INFO, EDAC_PCI, |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 431 | "Removed device %d for %s %s: DEV %s\n", |
Stephen Rothwell | 17aa7e0 | 2008-05-05 13:54:19 +1000 | [diff] [blame] | 432 | pci->pci_idx, pci->mod_name, pci->ctl_name, edac_dev_name(pci)); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 433 | |
| 434 | return pci; |
| 435 | } |
| 436 | EXPORT_SYMBOL_GPL(edac_pci_del_device); |
| 437 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 438 | /* |
| 439 | * edac_pci_generic_check |
| 440 | * |
| 441 | * a Generic parity check API |
| 442 | */ |
Adrian Bunk | 1a45027 | 2008-04-29 01:03:18 -0700 | [diff] [blame] | 443 | static void edac_pci_generic_check(struct edac_pci_ctl_info *pci) |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 444 | { |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 445 | debugf4("%s()\n", __func__); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 446 | edac_pci_do_parity_check(); |
| 447 | } |
| 448 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 449 | /* free running instance index counter */ |
Douglas Thompson | f044091 | 2007-07-19 01:50:19 -0700 | [diff] [blame] | 450 | static int edac_pci_idx; |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 451 | #define EDAC_PCI_GENCTL_NAME "EDAC PCI controller" |
| 452 | |
| 453 | struct edac_pci_gen_data { |
| 454 | int edac_idx; |
| 455 | }; |
| 456 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 457 | /* |
| 458 | * edac_pci_create_generic_ctl |
| 459 | * |
| 460 | * A generic constructor for a PCI parity polling device |
| 461 | * Some systems have more than one domain of PCI busses. |
| 462 | * For systems with one domain, then this API will |
| 463 | * provide for a generic poller. |
| 464 | * |
| 465 | * This routine calls the edac_pci_alloc_ctl_info() for |
| 466 | * the generic device, with default values |
| 467 | */ |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 468 | struct edac_pci_ctl_info *edac_pci_create_generic_ctl(struct device *dev, |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 469 | const char *mod_name) |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 470 | { |
| 471 | struct edac_pci_ctl_info *pci; |
| 472 | struct edac_pci_gen_data *pdata; |
| 473 | |
| 474 | pci = edac_pci_alloc_ctl_info(sizeof(*pdata), EDAC_PCI_GENCTL_NAME); |
| 475 | if (!pci) |
| 476 | return NULL; |
| 477 | |
| 478 | pdata = pci->pvt_info; |
| 479 | pci->dev = dev; |
| 480 | dev_set_drvdata(pci->dev, pci); |
| 481 | pci->dev_name = pci_name(to_pci_dev(dev)); |
| 482 | |
| 483 | pci->mod_name = mod_name; |
| 484 | pci->ctl_name = EDAC_PCI_GENCTL_NAME; |
| 485 | pci->edac_check = edac_pci_generic_check; |
| 486 | |
| 487 | pdata->edac_idx = edac_pci_idx++; |
| 488 | |
| 489 | if (edac_pci_add_device(pci, pdata->edac_idx) > 0) { |
| 490 | debugf3("%s(): failed edac_pci_add_device()\n", __func__); |
| 491 | edac_pci_free_ctl_info(pci); |
| 492 | return NULL; |
| 493 | } |
| 494 | |
| 495 | return pci; |
| 496 | } |
| 497 | EXPORT_SYMBOL_GPL(edac_pci_create_generic_ctl); |
| 498 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 499 | /* |
| 500 | * edac_pci_release_generic_ctl |
| 501 | * |
| 502 | * The release function of a generic EDAC PCI polling device |
| 503 | */ |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 504 | void edac_pci_release_generic_ctl(struct edac_pci_ctl_info *pci) |
| 505 | { |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 506 | debugf0("%s() pci mod=%s\n", __func__, pci->mod_name); |
| 507 | |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 508 | edac_pci_del_device(pci->dev); |
| 509 | edac_pci_free_ctl_info(pci); |
| 510 | } |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 511 | EXPORT_SYMBOL_GPL(edac_pci_release_generic_ctl); |