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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * EDAC PCI component
4 *
5 * Author: Dave Jiang <djiang@mvista.com>
6 *
7 * 2007 (c) MontaVista Software, Inc.
8 */
9#include <asm/page.h>
10#include <linux/uaccess.h>
11#include <linux/ctype.h>
12#include <linux/highmem.h>
13#include <linux/init.h>
14#include <linux/module.h>
15#include <linux/slab.h>
16#include <linux/smp.h>
17#include <linux/spinlock.h>
18#include <linux/sysctl.h>
19#include <linux/timer.h>
20
21#include "edac_pci.h"
22#include "edac_module.h"
23
24static DEFINE_MUTEX(edac_pci_ctls_mutex);
25static LIST_HEAD(edac_pci_list);
26static atomic_t pci_indexes = ATOMIC_INIT(0);
27
28struct edac_pci_ctl_info *edac_pci_alloc_ctl_info(unsigned int sz_pvt,
29 const char *edac_pci_name)
30{
31 struct edac_pci_ctl_info *pci;
32
33 edac_dbg(1, "\n");
34
35 pci = kzalloc(sizeof(struct edac_pci_ctl_info), GFP_KERNEL);
36 if (!pci)
37 return NULL;
38
39 if (sz_pvt) {
40 pci->pvt_info = kzalloc(sz_pvt, GFP_KERNEL);
41 if (!pci->pvt_info)
42 goto free;
43 }
44
45 pci->op_state = OP_ALLOC;
46
47 snprintf(pci->name, strlen(edac_pci_name) + 1, "%s", edac_pci_name);
48
49 return pci;
50
51free:
52 kfree(pci);
53 return NULL;
54}
55EXPORT_SYMBOL_GPL(edac_pci_alloc_ctl_info);
56
57void edac_pci_free_ctl_info(struct edac_pci_ctl_info *pci)
58{
59 edac_dbg(1, "\n");
60
61 edac_pci_remove_sysfs(pci);
62}
63EXPORT_SYMBOL_GPL(edac_pci_free_ctl_info);
64
65/*
66 * find_edac_pci_by_dev()
67 * scans the edac_pci list for a specific 'struct device *'
68 *
69 * return NULL if not found, or return control struct pointer
70 */
71static struct edac_pci_ctl_info *find_edac_pci_by_dev(struct device *dev)
72{
73 struct edac_pci_ctl_info *pci;
74 struct list_head *item;
75
76 edac_dbg(1, "\n");
77
78 list_for_each(item, &edac_pci_list) {
79 pci = list_entry(item, struct edac_pci_ctl_info, link);
80
81 if (pci->dev == dev)
82 return pci;
83 }
84
85 return NULL;
86}
87
88/*
89 * add_edac_pci_to_global_list
90 * Before calling this function, caller must assign a unique value to
91 * edac_dev->pci_idx.
92 * Return:
93 * 0 on success
94 * 1 on failure
95 */
96static int add_edac_pci_to_global_list(struct edac_pci_ctl_info *pci)
97{
98 struct list_head *item, *insert_before;
99 struct edac_pci_ctl_info *rover;
100
101 edac_dbg(1, "\n");
102
103 insert_before = &edac_pci_list;
104
105 /* Determine if already on the list */
106 rover = find_edac_pci_by_dev(pci->dev);
107 if (unlikely(rover != NULL))
108 goto fail0;
109
110 /* Insert in ascending order by 'pci_idx', so find position */
111 list_for_each(item, &edac_pci_list) {
112 rover = list_entry(item, struct edac_pci_ctl_info, link);
113
114 if (rover->pci_idx >= pci->pci_idx) {
115 if (unlikely(rover->pci_idx == pci->pci_idx))
116 goto fail1;
117
118 insert_before = item;
119 break;
120 }
121 }
122
123 list_add_tail_rcu(&pci->link, insert_before);
124 return 0;
125
126fail0:
127 edac_printk(KERN_WARNING, EDAC_PCI,
128 "%s (%s) %s %s already assigned %d\n",
129 dev_name(rover->dev), edac_dev_name(rover),
130 rover->mod_name, rover->ctl_name, rover->pci_idx);
131 return 1;
132
133fail1:
134 edac_printk(KERN_WARNING, EDAC_PCI,
135 "but in low-level driver: attempt to assign\n"
136 "\tduplicate pci_idx %d in %s()\n", rover->pci_idx,
137 __func__);
138 return 1;
139}
140
141/*
142 * del_edac_pci_from_global_list
143 *
144 * remove the PCI control struct from the global list
145 */
146static void del_edac_pci_from_global_list(struct edac_pci_ctl_info *pci)
147{
148 list_del_rcu(&pci->link);
149
150 /* these are for safe removal of devices from global list while
151 * NMI handlers may be traversing list
152 */
153 synchronize_rcu();
154 INIT_LIST_HEAD(&pci->link);
155}
156
157/*
158 * edac_pci_workq_function()
159 *
160 * periodic function that performs the operation
161 * scheduled by a workq request, for a given PCI control struct
162 */
163static void edac_pci_workq_function(struct work_struct *work_req)
164{
165 struct delayed_work *d_work = to_delayed_work(work_req);
166 struct edac_pci_ctl_info *pci = to_edac_pci_ctl_work(d_work);
167 int msec;
168 unsigned long delay;
169
170 edac_dbg(3, "checking\n");
171
172 mutex_lock(&edac_pci_ctls_mutex);
173
174 if (pci->op_state != OP_RUNNING_POLL) {
175 mutex_unlock(&edac_pci_ctls_mutex);
176 return;
177 }
178
179 if (edac_pci_get_check_errors())
180 pci->edac_check(pci);
181
182 /* if we are on a one second period, then use round */
183 msec = edac_pci_get_poll_msec();
184 if (msec == 1000)
185 delay = round_jiffies_relative(msecs_to_jiffies(msec));
186 else
187 delay = msecs_to_jiffies(msec);
188
189 edac_queue_work(&pci->work, delay);
190
191 mutex_unlock(&edac_pci_ctls_mutex);
192}
193
194int edac_pci_alloc_index(void)
195{
196 return atomic_inc_return(&pci_indexes) - 1;
197}
198EXPORT_SYMBOL_GPL(edac_pci_alloc_index);
199
200int edac_pci_add_device(struct edac_pci_ctl_info *pci, int edac_idx)
201{
202 edac_dbg(0, "\n");
203
204 pci->pci_idx = edac_idx;
205 pci->start_time = jiffies;
206
207 mutex_lock(&edac_pci_ctls_mutex);
208
209 if (add_edac_pci_to_global_list(pci))
210 goto fail0;
211
212 if (edac_pci_create_sysfs(pci)) {
213 edac_pci_printk(pci, KERN_WARNING,
214 "failed to create sysfs pci\n");
215 goto fail1;
216 }
217
218 if (pci->edac_check) {
219 pci->op_state = OP_RUNNING_POLL;
220
221 INIT_DELAYED_WORK(&pci->work, edac_pci_workq_function);
222 edac_queue_work(&pci->work, msecs_to_jiffies(edac_pci_get_poll_msec()));
223
224 } else {
225 pci->op_state = OP_RUNNING_INTERRUPT;
226 }
227
228 edac_pci_printk(pci, KERN_INFO,
229 "Giving out device to module %s controller %s: DEV %s (%s)\n",
230 pci->mod_name, pci->ctl_name, pci->dev_name,
231 edac_op_state_to_string(pci->op_state));
232
233 mutex_unlock(&edac_pci_ctls_mutex);
234 return 0;
235
236 /* error unwind stack */
237fail1:
238 del_edac_pci_from_global_list(pci);
239fail0:
240 mutex_unlock(&edac_pci_ctls_mutex);
241 return 1;
242}
243EXPORT_SYMBOL_GPL(edac_pci_add_device);
244
245struct edac_pci_ctl_info *edac_pci_del_device(struct device *dev)
246{
247 struct edac_pci_ctl_info *pci;
248
249 edac_dbg(0, "\n");
250
251 mutex_lock(&edac_pci_ctls_mutex);
252
253 /* ensure the control struct is on the global list
254 * if not, then leave
255 */
256 pci = find_edac_pci_by_dev(dev);
257 if (pci == NULL) {
258 mutex_unlock(&edac_pci_ctls_mutex);
259 return NULL;
260 }
261
262 pci->op_state = OP_OFFLINE;
263
264 del_edac_pci_from_global_list(pci);
265
266 mutex_unlock(&edac_pci_ctls_mutex);
267
268 if (pci->edac_check)
269 edac_stop_work(&pci->work);
270
271 edac_printk(KERN_INFO, EDAC_PCI,
272 "Removed device %d for %s %s: DEV %s\n",
273 pci->pci_idx, pci->mod_name, pci->ctl_name, edac_dev_name(pci));
274
275 return pci;
276}
277EXPORT_SYMBOL_GPL(edac_pci_del_device);
278
279/*
280 * edac_pci_generic_check
281 *
282 * a Generic parity check API
283 */
284static void edac_pci_generic_check(struct edac_pci_ctl_info *pci)
285{
286 edac_dbg(4, "\n");
287 edac_pci_do_parity_check();
288}
289
290/* free running instance index counter */
291static int edac_pci_idx;
292#define EDAC_PCI_GENCTL_NAME "EDAC PCI controller"
293
294struct edac_pci_gen_data {
295 int edac_idx;
296};
297
298struct edac_pci_ctl_info *edac_pci_create_generic_ctl(struct device *dev,
299 const char *mod_name)
300{
301 struct edac_pci_ctl_info *pci;
302 struct edac_pci_gen_data *pdata;
303
304 pci = edac_pci_alloc_ctl_info(sizeof(*pdata), EDAC_PCI_GENCTL_NAME);
305 if (!pci)
306 return NULL;
307
308 pdata = pci->pvt_info;
309 pci->dev = dev;
310 dev_set_drvdata(pci->dev, pci);
311 pci->dev_name = pci_name(to_pci_dev(dev));
312
313 pci->mod_name = mod_name;
314 pci->ctl_name = EDAC_PCI_GENCTL_NAME;
315 if (edac_op_state == EDAC_OPSTATE_POLL)
316 pci->edac_check = edac_pci_generic_check;
317
318 pdata->edac_idx = edac_pci_idx++;
319
320 if (edac_pci_add_device(pci, pdata->edac_idx) > 0) {
321 edac_dbg(3, "failed edac_pci_add_device()\n");
322 edac_pci_free_ctl_info(pci);
323 return NULL;
324 }
325
326 return pci;
327}
328EXPORT_SYMBOL_GPL(edac_pci_create_generic_ctl);
329
330void edac_pci_release_generic_ctl(struct edac_pci_ctl_info *pci)
331{
332 edac_dbg(0, "pci mod=%s\n", pci->mod_name);
333
334 edac_pci_del_device(pci->dev);
335 edac_pci_free_ctl_info(pci);
336}
337EXPORT_SYMBOL_GPL(edac_pci_release_generic_ctl);
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/ctype.h>
23#include <linux/workqueue.h>
24#include <asm/uaccess.h>
25#include <asm/page.h>
26
27#include "edac_core.h"
28#include "edac_module.h"
29
30static DEFINE_MUTEX(edac_pci_ctls_mutex);
31static LIST_HEAD(edac_pci_list);
32static atomic_t pci_indexes = ATOMIC_INIT(0);
33
34/*
35 * edac_pci_alloc_ctl_info
36 *
37 * The alloc() function for the 'edac_pci' control info
38 * structure. The chip driver will allocate one of these for each
39 * edac_pci it is going to control/register with the EDAC CORE.
40 */
41struct edac_pci_ctl_info *edac_pci_alloc_ctl_info(unsigned int sz_pvt,
42 const char *edac_pci_name)
43{
44 struct edac_pci_ctl_info *pci;
45 void *p = NULL, *pvt;
46 unsigned int size;
47
48 debugf1("%s()\n", __func__);
49
50 pci = edac_align_ptr(&p, sizeof(*pci), 1);
51 pvt = edac_align_ptr(&p, 1, sz_pvt);
52 size = ((unsigned long)pvt) + sz_pvt;
53
54 /* Alloc the needed control struct memory */
55 pci = kzalloc(size, GFP_KERNEL);
56 if (pci == NULL)
57 return NULL;
58
59 /* Now much private space */
60 pvt = sz_pvt ? ((char *)pci) + ((unsigned long)pvt) : NULL;
61
62 pci->pvt_info = pvt;
63 pci->op_state = OP_ALLOC;
64
65 snprintf(pci->name, strlen(edac_pci_name) + 1, "%s", edac_pci_name);
66
67 return pci;
68}
69EXPORT_SYMBOL_GPL(edac_pci_alloc_ctl_info);
70
71/*
72 * edac_pci_free_ctl_info()
73 *
74 * Last action on the pci control structure.
75 *
76 * call the remove sysfs information, which will unregister
77 * this control struct's kobj. When that kobj's ref count
78 * goes to zero, its release function will be call and then
79 * kfree() the memory.
80 */
81void edac_pci_free_ctl_info(struct edac_pci_ctl_info *pci)
82{
83 debugf1("%s()\n", __func__);
84
85 edac_pci_remove_sysfs(pci);
86}
87EXPORT_SYMBOL_GPL(edac_pci_free_ctl_info);
88
89/*
90 * find_edac_pci_by_dev()
91 * scans the edac_pci list for a specific 'struct device *'
92 *
93 * return NULL if not found, or return control struct pointer
94 */
95static struct edac_pci_ctl_info *find_edac_pci_by_dev(struct device *dev)
96{
97 struct edac_pci_ctl_info *pci;
98 struct list_head *item;
99
100 debugf1("%s()\n", __func__);
101
102 list_for_each(item, &edac_pci_list) {
103 pci = list_entry(item, struct edac_pci_ctl_info, link);
104
105 if (pci->dev == dev)
106 return pci;
107 }
108
109 return NULL;
110}
111
112/*
113 * add_edac_pci_to_global_list
114 * Before calling this function, caller must assign a unique value to
115 * edac_dev->pci_idx.
116 * Return:
117 * 0 on success
118 * 1 on failure
119 */
120static int add_edac_pci_to_global_list(struct edac_pci_ctl_info *pci)
121{
122 struct list_head *item, *insert_before;
123 struct edac_pci_ctl_info *rover;
124
125 debugf1("%s()\n", __func__);
126
127 insert_before = &edac_pci_list;
128
129 /* Determine if already on the list */
130 rover = find_edac_pci_by_dev(pci->dev);
131 if (unlikely(rover != NULL))
132 goto fail0;
133
134 /* Insert in ascending order by 'pci_idx', so find position */
135 list_for_each(item, &edac_pci_list) {
136 rover = list_entry(item, struct edac_pci_ctl_info, link);
137
138 if (rover->pci_idx >= pci->pci_idx) {
139 if (unlikely(rover->pci_idx == pci->pci_idx))
140 goto fail1;
141
142 insert_before = item;
143 break;
144 }
145 }
146
147 list_add_tail_rcu(&pci->link, insert_before);
148 return 0;
149
150fail0:
151 edac_printk(KERN_WARNING, EDAC_PCI,
152 "%s (%s) %s %s already assigned %d\n",
153 dev_name(rover->dev), edac_dev_name(rover),
154 rover->mod_name, rover->ctl_name, rover->pci_idx);
155 return 1;
156
157fail1:
158 edac_printk(KERN_WARNING, EDAC_PCI,
159 "but in low-level driver: attempt to assign\n"
160 "\tduplicate pci_idx %d in %s()\n", rover->pci_idx,
161 __func__);
162 return 1;
163}
164
165/*
166 * del_edac_pci_from_global_list
167 *
168 * remove the PCI control struct from the global list
169 */
170static void del_edac_pci_from_global_list(struct edac_pci_ctl_info *pci)
171{
172 list_del_rcu(&pci->link);
173
174 /* these are for safe removal of devices from global list while
175 * NMI handlers may be traversing list
176 */
177 synchronize_rcu();
178 INIT_LIST_HEAD(&pci->link);
179}
180
181#if 0
182/* Older code, but might use in the future */
183
184/*
185 * edac_pci_find()
186 * Search for an edac_pci_ctl_info structure whose index is 'idx'
187 *
188 * If found, return a pointer to the structure
189 * Else return NULL.
190 *
191 * Caller must hold pci_ctls_mutex.
192 */
193struct edac_pci_ctl_info *edac_pci_find(int idx)
194{
195 struct list_head *item;
196 struct edac_pci_ctl_info *pci;
197
198 /* Iterage over list, looking for exact match of ID */
199 list_for_each(item, &edac_pci_list) {
200 pci = list_entry(item, struct edac_pci_ctl_info, link);
201
202 if (pci->pci_idx >= idx) {
203 if (pci->pci_idx == idx)
204 return pci;
205
206 /* not on list, so terminate early */
207 break;
208 }
209 }
210
211 return NULL;
212}
213EXPORT_SYMBOL_GPL(edac_pci_find);
214#endif
215
216/*
217 * edac_pci_workq_function()
218 *
219 * periodic function that performs the operation
220 * scheduled by a workq request, for a given PCI control struct
221 */
222static void edac_pci_workq_function(struct work_struct *work_req)
223{
224 struct delayed_work *d_work = to_delayed_work(work_req);
225 struct edac_pci_ctl_info *pci = to_edac_pci_ctl_work(d_work);
226 int msec;
227 unsigned long delay;
228
229 debugf3("%s() checking\n", __func__);
230
231 mutex_lock(&edac_pci_ctls_mutex);
232
233 if (pci->op_state == OP_RUNNING_POLL) {
234 /* we might be in POLL mode, but there may NOT be a poll func
235 */
236 if ((pci->edac_check != NULL) && edac_pci_get_check_errors())
237 pci->edac_check(pci);
238
239 /* if we are on a one second period, then use round */
240 msec = edac_pci_get_poll_msec();
241 if (msec == 1000)
242 delay = round_jiffies_relative(msecs_to_jiffies(msec));
243 else
244 delay = msecs_to_jiffies(msec);
245
246 /* Reschedule only if we are in POLL mode */
247 queue_delayed_work(edac_workqueue, &pci->work, delay);
248 }
249
250 mutex_unlock(&edac_pci_ctls_mutex);
251}
252
253/*
254 * edac_pci_workq_setup()
255 * initialize a workq item for this edac_pci instance
256 * passing in the new delay period in msec
257 *
258 * locking model:
259 * called when 'edac_pci_ctls_mutex' is locked
260 */
261static void edac_pci_workq_setup(struct edac_pci_ctl_info *pci,
262 unsigned int msec)
263{
264 debugf0("%s()\n", __func__);
265
266 INIT_DELAYED_WORK(&pci->work, edac_pci_workq_function);
267 queue_delayed_work(edac_workqueue, &pci->work,
268 msecs_to_jiffies(edac_pci_get_poll_msec()));
269}
270
271/*
272 * edac_pci_workq_teardown()
273 * stop the workq processing on this edac_pci instance
274 */
275static void edac_pci_workq_teardown(struct edac_pci_ctl_info *pci)
276{
277 int status;
278
279 debugf0("%s()\n", __func__);
280
281 status = cancel_delayed_work(&pci->work);
282 if (status == 0)
283 flush_workqueue(edac_workqueue);
284}
285
286/*
287 * edac_pci_reset_delay_period
288 *
289 * called with a new period value for the workq period
290 * a) stop current workq timer
291 * b) restart workq timer with new value
292 */
293void edac_pci_reset_delay_period(struct edac_pci_ctl_info *pci,
294 unsigned long value)
295{
296 debugf0("%s()\n", __func__);
297
298 edac_pci_workq_teardown(pci);
299
300 /* need to lock for the setup */
301 mutex_lock(&edac_pci_ctls_mutex);
302
303 edac_pci_workq_setup(pci, value);
304
305 mutex_unlock(&edac_pci_ctls_mutex);
306}
307EXPORT_SYMBOL_GPL(edac_pci_reset_delay_period);
308
309/*
310 * edac_pci_alloc_index: Allocate a unique PCI index number
311 *
312 * Return:
313 * allocated index number
314 *
315 */
316int edac_pci_alloc_index(void)
317{
318 return atomic_inc_return(&pci_indexes) - 1;
319}
320EXPORT_SYMBOL_GPL(edac_pci_alloc_index);
321
322/*
323 * edac_pci_add_device: Insert the 'edac_dev' structure into the
324 * edac_pci global list and create sysfs entries associated with
325 * edac_pci structure.
326 * @pci: pointer to the edac_device structure to be added to the list
327 * @edac_idx: A unique numeric identifier to be assigned to the
328 * 'edac_pci' structure.
329 *
330 * Return:
331 * 0 Success
332 * !0 Failure
333 */
334int edac_pci_add_device(struct edac_pci_ctl_info *pci, int edac_idx)
335{
336 debugf0("%s()\n", __func__);
337
338 pci->pci_idx = edac_idx;
339 pci->start_time = jiffies;
340
341 mutex_lock(&edac_pci_ctls_mutex);
342
343 if (add_edac_pci_to_global_list(pci))
344 goto fail0;
345
346 if (edac_pci_create_sysfs(pci)) {
347 edac_pci_printk(pci, KERN_WARNING,
348 "failed to create sysfs pci\n");
349 goto fail1;
350 }
351
352 if (pci->edac_check != NULL) {
353 pci->op_state = OP_RUNNING_POLL;
354
355 edac_pci_workq_setup(pci, 1000);
356 } else {
357 pci->op_state = OP_RUNNING_INTERRUPT;
358 }
359
360 edac_pci_printk(pci, KERN_INFO,
361 "Giving out device to module '%s' controller '%s':"
362 " DEV '%s' (%s)\n",
363 pci->mod_name,
364 pci->ctl_name,
365 edac_dev_name(pci), edac_op_state_to_string(pci->op_state));
366
367 mutex_unlock(&edac_pci_ctls_mutex);
368 return 0;
369
370 /* error unwind stack */
371fail1:
372 del_edac_pci_from_global_list(pci);
373fail0:
374 mutex_unlock(&edac_pci_ctls_mutex);
375 return 1;
376}
377EXPORT_SYMBOL_GPL(edac_pci_add_device);
378
379/*
380 * edac_pci_del_device()
381 * Remove sysfs entries for specified edac_pci structure and
382 * then remove edac_pci structure from global list
383 *
384 * @dev:
385 * Pointer to 'struct device' representing edac_pci structure
386 * to remove
387 *
388 * Return:
389 * Pointer to removed edac_pci structure,
390 * or NULL if device not found
391 */
392struct edac_pci_ctl_info *edac_pci_del_device(struct device *dev)
393{
394 struct edac_pci_ctl_info *pci;
395
396 debugf0("%s()\n", __func__);
397
398 mutex_lock(&edac_pci_ctls_mutex);
399
400 /* ensure the control struct is on the global list
401 * if not, then leave
402 */
403 pci = find_edac_pci_by_dev(dev);
404 if (pci == NULL) {
405 mutex_unlock(&edac_pci_ctls_mutex);
406 return NULL;
407 }
408
409 pci->op_state = OP_OFFLINE;
410
411 del_edac_pci_from_global_list(pci);
412
413 mutex_unlock(&edac_pci_ctls_mutex);
414
415 /* stop the workq timer */
416 edac_pci_workq_teardown(pci);
417
418 edac_printk(KERN_INFO, EDAC_PCI,
419 "Removed device %d for %s %s: DEV %s\n",
420 pci->pci_idx, pci->mod_name, pci->ctl_name, edac_dev_name(pci));
421
422 return pci;
423}
424EXPORT_SYMBOL_GPL(edac_pci_del_device);
425
426/*
427 * edac_pci_generic_check
428 *
429 * a Generic parity check API
430 */
431static void edac_pci_generic_check(struct edac_pci_ctl_info *pci)
432{
433 debugf4("%s()\n", __func__);
434 edac_pci_do_parity_check();
435}
436
437/* free running instance index counter */
438static int edac_pci_idx;
439#define EDAC_PCI_GENCTL_NAME "EDAC PCI controller"
440
441struct edac_pci_gen_data {
442 int edac_idx;
443};
444
445/*
446 * edac_pci_create_generic_ctl
447 *
448 * A generic constructor for a PCI parity polling device
449 * Some systems have more than one domain of PCI busses.
450 * For systems with one domain, then this API will
451 * provide for a generic poller.
452 *
453 * This routine calls the edac_pci_alloc_ctl_info() for
454 * the generic device, with default values
455 */
456struct edac_pci_ctl_info *edac_pci_create_generic_ctl(struct device *dev,
457 const char *mod_name)
458{
459 struct edac_pci_ctl_info *pci;
460 struct edac_pci_gen_data *pdata;
461
462 pci = edac_pci_alloc_ctl_info(sizeof(*pdata), EDAC_PCI_GENCTL_NAME);
463 if (!pci)
464 return NULL;
465
466 pdata = pci->pvt_info;
467 pci->dev = dev;
468 dev_set_drvdata(pci->dev, pci);
469 pci->dev_name = pci_name(to_pci_dev(dev));
470
471 pci->mod_name = mod_name;
472 pci->ctl_name = EDAC_PCI_GENCTL_NAME;
473 pci->edac_check = edac_pci_generic_check;
474
475 pdata->edac_idx = edac_pci_idx++;
476
477 if (edac_pci_add_device(pci, pdata->edac_idx) > 0) {
478 debugf3("%s(): failed edac_pci_add_device()\n", __func__);
479 edac_pci_free_ctl_info(pci);
480 return NULL;
481 }
482
483 return pci;
484}
485EXPORT_SYMBOL_GPL(edac_pci_create_generic_ctl);
486
487/*
488 * edac_pci_release_generic_ctl
489 *
490 * The release function of a generic EDAC PCI polling device
491 */
492void edac_pci_release_generic_ctl(struct edac_pci_ctl_info *pci)
493{
494 debugf0("%s() pci mod=%s\n", __func__, pci->mod_name);
495
496 edac_pci_del_device(pci->dev);
497 edac_pci_free_ctl_info(pci);
498}
499EXPORT_SYMBOL_GPL(edac_pci_release_generic_ctl);