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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/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
31static DEFINE_MUTEX(edac_pci_ctls_mutex);
32static LIST_HEAD(edac_pci_list);
33static atomic_t pci_indexes = ATOMIC_INIT(0);
34
35/*
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.
41 */
42struct edac_pci_ctl_info *edac_pci_alloc_ctl_info(unsigned int sz_pvt,
43 const char *edac_pci_name)
44{
45 struct edac_pci_ctl_info *pci;
46 void *pvt;
47 unsigned int size;
48
49 debugf1("%s()\n", __func__);
50
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
55 /* Alloc the needed control struct memory */
56 pci = kzalloc(size, GFP_KERNEL);
57 if (pci == NULL)
58 return NULL;
59
60 /* Now much private space */
61 pvt = sz_pvt ? ((char *)pci) + ((unsigned long)pvt) : NULL;
62
63 pci->pvt_info = pvt;
64 pci->op_state = OP_ALLOC;
65
66 snprintf(pci->name, strlen(edac_pci_name) + 1, "%s", edac_pci_name);
67
68 return pci;
69}
70EXPORT_SYMBOL_GPL(edac_pci_alloc_ctl_info);
71
72/*
73 * edac_pci_free_ctl_info()
74 *
75 * Last action on the pci control structure.
76 *
77 * call the remove sysfs information, which will unregister
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.
81 */
82void edac_pci_free_ctl_info(struct edac_pci_ctl_info *pci)
83{
84 debugf1("%s()\n", __func__);
85
86 edac_pci_remove_sysfs(pci);
87}
88EXPORT_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 *'
93 *
94 * return NULL if not found, or return control struct pointer
95 */
96static struct edac_pci_ctl_info *find_edac_pci_by_dev(struct device *dev)
97{
98 struct edac_pci_ctl_info *pci;
99 struct list_head *item;
100
101 debugf1("%s()\n", __func__);
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 */
121static 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
126 debugf1("%s()\n", __func__);
127
128 insert_before = &edac_pci_list;
129
130 /* Determine if already on the list */
131 rover = find_edac_pci_by_dev(pci->dev);
132 if (unlikely(rover != NULL))
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
151fail0:
152 edac_printk(KERN_WARNING, EDAC_PCI,
153 "%s (%s) %s %s already assigned %d\n",
154 dev_name(rover->dev), edac_dev_name(rover),
155 rover->mod_name, rover->ctl_name, rover->pci_idx);
156 return 1;
157
158fail1:
159 edac_printk(KERN_WARNING, EDAC_PCI,
160 "but in low-level driver: attempt to assign\n"
161 "\tduplicate pci_idx %d in %s()\n", rover->pci_idx,
162 __func__);
163 return 1;
164}
165
166/*
167 * del_edac_pci_from_global_list
168 *
169 * remove the PCI control struct from the global list
170 */
171static void del_edac_pci_from_global_list(struct edac_pci_ctl_info *pci)
172{
173 list_del_rcu(&pci->link);
174
175 /* these are for safe removal of devices from global list while
176 * NMI handlers may be traversing list
177 */
178 synchronize_rcu();
179 INIT_LIST_HEAD(&pci->link);
180}
181
182#if 0
183/* Older code, but might use in the future */
184
185/*
186 * edac_pci_find()
187 * Search for an edac_pci_ctl_info structure whose index is 'idx'
188 *
189 * If found, return a pointer to the structure
190 * Else return NULL.
191 *
192 * Caller must hold pci_ctls_mutex.
193 */
194struct edac_pci_ctl_info *edac_pci_find(int idx)
195{
196 struct list_head *item;
197 struct edac_pci_ctl_info *pci;
198
199 /* Iterage over list, looking for exact match of ID */
200 list_for_each(item, &edac_pci_list) {
201 pci = list_entry(item, struct edac_pci_ctl_info, link);
202
203 if (pci->pci_idx >= idx) {
204 if (pci->pci_idx == idx)
205 return pci;
206
207 /* not on list, so terminate early */
208 break;
209 }
210 }
211
212 return NULL;
213}
214EXPORT_SYMBOL_GPL(edac_pci_find);
215#endif
216
217/*
218 * edac_pci_workq_function()
219 *
220 * periodic function that performs the operation
221 * scheduled by a workq request, for a given PCI control struct
222 */
223static void edac_pci_workq_function(struct work_struct *work_req)
224{
225 struct delayed_work *d_work = to_delayed_work(work_req);
226 struct edac_pci_ctl_info *pci = to_edac_pci_ctl_work(d_work);
227 int msec;
228 unsigned long delay;
229
230 debugf3("%s() checking\n", __func__);
231
232 mutex_lock(&edac_pci_ctls_mutex);
233
234 if (pci->op_state == OP_RUNNING_POLL) {
235 /* we might be in POLL mode, but there may NOT be a poll func
236 */
237 if ((pci->edac_check != NULL) && edac_pci_get_check_errors())
238 pci->edac_check(pci);
239
240 /* if we are on a one second period, then use round */
241 msec = edac_pci_get_poll_msec();
242 if (msec == 1000)
243 delay = round_jiffies_relative(msecs_to_jiffies(msec));
244 else
245 delay = msecs_to_jiffies(msec);
246
247 /* Reschedule only if we are in POLL mode */
248 queue_delayed_work(edac_workqueue, &pci->work, delay);
249 }
250
251 mutex_unlock(&edac_pci_ctls_mutex);
252}
253
254/*
255 * edac_pci_workq_setup()
256 * initialize a workq item for this edac_pci instance
257 * passing in the new delay period in msec
258 *
259 * locking model:
260 * called when 'edac_pci_ctls_mutex' is locked
261 */
262static void edac_pci_workq_setup(struct edac_pci_ctl_info *pci,
263 unsigned int msec)
264{
265 debugf0("%s()\n", __func__);
266
267 INIT_DELAYED_WORK(&pci->work, edac_pci_workq_function);
268 queue_delayed_work(edac_workqueue, &pci->work,
269 msecs_to_jiffies(edac_pci_get_poll_msec()));
270}
271
272/*
273 * edac_pci_workq_teardown()
274 * stop the workq processing on this edac_pci instance
275 */
276static void edac_pci_workq_teardown(struct edac_pci_ctl_info *pci)
277{
278 int status;
279
280 debugf0("%s()\n", __func__);
281
282 status = cancel_delayed_work(&pci->work);
283 if (status == 0)
284 flush_workqueue(edac_workqueue);
285}
286
287/*
288 * edac_pci_reset_delay_period
289 *
290 * called with a new period value for the workq period
291 * a) stop current workq timer
292 * b) restart workq timer with new value
293 */
294void edac_pci_reset_delay_period(struct edac_pci_ctl_info *pci,
295 unsigned long value)
296{
297 debugf0("%s()\n", __func__);
298
299 edac_pci_workq_teardown(pci);
300
301 /* need to lock for the setup */
302 mutex_lock(&edac_pci_ctls_mutex);
303
304 edac_pci_workq_setup(pci, value);
305
306 mutex_unlock(&edac_pci_ctls_mutex);
307}
308EXPORT_SYMBOL_GPL(edac_pci_reset_delay_period);
309
310/*
311 * edac_pci_alloc_index: Allocate a unique PCI index number
312 *
313 * Return:
314 * allocated index number
315 *
316 */
317int edac_pci_alloc_index(void)
318{
319 return atomic_inc_return(&pci_indexes) - 1;
320}
321EXPORT_SYMBOL_GPL(edac_pci_alloc_index);
322
323/*
324 * edac_pci_add_device: Insert the 'edac_dev' structure into the
325 * edac_pci global list and create sysfs entries associated with
326 * edac_pci structure.
327 * @pci: pointer to the edac_device structure to be added to the list
328 * @edac_idx: A unique numeric identifier to be assigned to the
329 * 'edac_pci' structure.
330 *
331 * Return:
332 * 0 Success
333 * !0 Failure
334 */
335int edac_pci_add_device(struct edac_pci_ctl_info *pci, int edac_idx)
336{
337 debugf0("%s()\n", __func__);
338
339 pci->pci_idx = edac_idx;
340 pci->start_time = jiffies;
341
342 mutex_lock(&edac_pci_ctls_mutex);
343
344 if (add_edac_pci_to_global_list(pci))
345 goto fail0;
346
347 if (edac_pci_create_sysfs(pci)) {
348 edac_pci_printk(pci, KERN_WARNING,
349 "failed to create sysfs pci\n");
350 goto fail1;
351 }
352
353 if (pci->edac_check != NULL) {
354 pci->op_state = OP_RUNNING_POLL;
355
356 edac_pci_workq_setup(pci, 1000);
357 } else {
358 pci->op_state = OP_RUNNING_INTERRUPT;
359 }
360
361 edac_pci_printk(pci, KERN_INFO,
362 "Giving out device to module '%s' controller '%s':"
363 " DEV '%s' (%s)\n",
364 pci->mod_name,
365 pci->ctl_name,
366 edac_dev_name(pci), edac_op_state_to_string(pci->op_state));
367
368 mutex_unlock(&edac_pci_ctls_mutex);
369 return 0;
370
371 /* error unwind stack */
372fail1:
373 del_edac_pci_from_global_list(pci);
374fail0:
375 mutex_unlock(&edac_pci_ctls_mutex);
376 return 1;
377}
378EXPORT_SYMBOL_GPL(edac_pci_add_device);
379
380/*
381 * edac_pci_del_device()
382 * Remove sysfs entries for specified edac_pci structure and
383 * then remove edac_pci structure from global list
384 *
385 * @dev:
386 * Pointer to 'struct device' representing edac_pci structure
387 * to remove
388 *
389 * Return:
390 * Pointer to removed edac_pci structure,
391 * or NULL if device not found
392 */
393struct edac_pci_ctl_info *edac_pci_del_device(struct device *dev)
394{
395 struct edac_pci_ctl_info *pci;
396
397 debugf0("%s()\n", __func__);
398
399 mutex_lock(&edac_pci_ctls_mutex);
400
401 /* ensure the control struct is on the global list
402 * if not, then leave
403 */
404 pci = find_edac_pci_by_dev(dev);
405 if (pci == NULL) {
406 mutex_unlock(&edac_pci_ctls_mutex);
407 return NULL;
408 }
409
410 pci->op_state = OP_OFFLINE;
411
412 del_edac_pci_from_global_list(pci);
413
414 mutex_unlock(&edac_pci_ctls_mutex);
415
416 /* stop the workq timer */
417 edac_pci_workq_teardown(pci);
418
419 edac_printk(KERN_INFO, EDAC_PCI,
420 "Removed device %d for %s %s: DEV %s\n",
421 pci->pci_idx, pci->mod_name, pci->ctl_name, edac_dev_name(pci));
422
423 return pci;
424}
425EXPORT_SYMBOL_GPL(edac_pci_del_device);
426
427/*
428 * edac_pci_generic_check
429 *
430 * a Generic parity check API
431 */
432static void edac_pci_generic_check(struct edac_pci_ctl_info *pci)
433{
434 debugf4("%s()\n", __func__);
435 edac_pci_do_parity_check();
436}
437
438/* free running instance index counter */
439static int edac_pci_idx;
440#define EDAC_PCI_GENCTL_NAME "EDAC PCI controller"
441
442struct edac_pci_gen_data {
443 int edac_idx;
444};
445
446/*
447 * edac_pci_create_generic_ctl
448 *
449 * A generic constructor for a PCI parity polling device
450 * Some systems have more than one domain of PCI busses.
451 * For systems with one domain, then this API will
452 * provide for a generic poller.
453 *
454 * This routine calls the edac_pci_alloc_ctl_info() for
455 * the generic device, with default values
456 */
457struct edac_pci_ctl_info *edac_pci_create_generic_ctl(struct device *dev,
458 const char *mod_name)
459{
460 struct edac_pci_ctl_info *pci;
461 struct edac_pci_gen_data *pdata;
462
463 pci = edac_pci_alloc_ctl_info(sizeof(*pdata), EDAC_PCI_GENCTL_NAME);
464 if (!pci)
465 return NULL;
466
467 pdata = pci->pvt_info;
468 pci->dev = dev;
469 dev_set_drvdata(pci->dev, pci);
470 pci->dev_name = pci_name(to_pci_dev(dev));
471
472 pci->mod_name = mod_name;
473 pci->ctl_name = EDAC_PCI_GENCTL_NAME;
474 pci->edac_check = edac_pci_generic_check;
475
476 pdata->edac_idx = edac_pci_idx++;
477
478 if (edac_pci_add_device(pci, pdata->edac_idx) > 0) {
479 debugf3("%s(): failed edac_pci_add_device()\n", __func__);
480 edac_pci_free_ctl_info(pci);
481 return NULL;
482 }
483
484 return pci;
485}
486EXPORT_SYMBOL_GPL(edac_pci_create_generic_ctl);
487
488/*
489 * edac_pci_release_generic_ctl
490 *
491 * The release function of a generic EDAC PCI polling device
492 */
493void edac_pci_release_generic_ctl(struct edac_pci_ctl_info *pci)
494{
495 debugf0("%s() pci mod=%s\n", __func__, pci->mod_name);
496
497 edac_pci_del_device(pci->dev);
498 edac_pci_free_ctl_info(pci);
499}
500EXPORT_SYMBOL_GPL(edac_pci_release_generic_ctl);