Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * drivers/pci/pci-sysfs.c | |
3 | * | |
4 | * (C) Copyright 2002-2004 Greg Kroah-Hartman <greg@kroah.com> | |
5 | * (C) Copyright 2002-2004 IBM Corp. | |
6 | * (C) Copyright 2003 Matthew Wilcox | |
7 | * (C) Copyright 2003 Hewlett-Packard | |
8 | * (C) Copyright 2004 Jon Smirl <jonsmirl@yahoo.com> | |
9 | * (C) Copyright 2004 Silicon Graphics, Inc. Jesse Barnes <jbarnes@sgi.com> | |
10 | * | |
11 | * File attributes for PCI devices | |
12 | * | |
13 | * Modeled after usb's driverfs.c | |
14 | * | |
15 | */ | |
16 | ||
17 | ||
1da177e4 | 18 | #include <linux/kernel.h> |
b5ff7df3 | 19 | #include <linux/sched.h> |
1da177e4 LT |
20 | #include <linux/pci.h> |
21 | #include <linux/stat.h> | |
22 | #include <linux/topology.h> | |
23 | #include <linux/mm.h> | |
aa0ac365 | 24 | #include <linux/capability.h> |
7d715a6c | 25 | #include <linux/pci-aspm.h> |
1da177e4 LT |
26 | #include "pci.h" |
27 | ||
28 | static int sysfs_initialized; /* = 0 */ | |
29 | ||
30 | /* show configuration fields */ | |
31 | #define pci_config_attr(field, format_string) \ | |
32 | static ssize_t \ | |
e404e274 | 33 | field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
34 | { \ |
35 | struct pci_dev *pdev; \ | |
36 | \ | |
37 | pdev = to_pci_dev (dev); \ | |
38 | return sprintf (buf, format_string, pdev->field); \ | |
39 | } | |
40 | ||
41 | pci_config_attr(vendor, "0x%04x\n"); | |
42 | pci_config_attr(device, "0x%04x\n"); | |
43 | pci_config_attr(subsystem_vendor, "0x%04x\n"); | |
44 | pci_config_attr(subsystem_device, "0x%04x\n"); | |
45 | pci_config_attr(class, "0x%06x\n"); | |
46 | pci_config_attr(irq, "%u\n"); | |
47 | ||
bdee9d98 DT |
48 | static ssize_t broken_parity_status_show(struct device *dev, |
49 | struct device_attribute *attr, | |
50 | char *buf) | |
51 | { | |
52 | struct pci_dev *pdev = to_pci_dev(dev); | |
53 | return sprintf (buf, "%u\n", pdev->broken_parity_status); | |
54 | } | |
55 | ||
56 | static ssize_t broken_parity_status_store(struct device *dev, | |
57 | struct device_attribute *attr, | |
58 | const char *buf, size_t count) | |
59 | { | |
60 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 | 61 | unsigned long val; |
bdee9d98 | 62 | |
92425a40 TP |
63 | if (strict_strtoul(buf, 0, &val) < 0) |
64 | return -EINVAL; | |
65 | ||
66 | pdev->broken_parity_status = !!val; | |
67 | ||
68 | return count; | |
bdee9d98 DT |
69 | } |
70 | ||
4327edf6 AC |
71 | static ssize_t local_cpus_show(struct device *dev, |
72 | struct device_attribute *attr, char *buf) | |
1da177e4 | 73 | { |
3be83050 | 74 | const struct cpumask *mask; |
4327edf6 AC |
75 | int len; |
76 | ||
3be83050 MT |
77 | mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); |
78 | len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask); | |
39106dcf MT |
79 | buf[len++] = '\n'; |
80 | buf[len] = '\0'; | |
81 | return len; | |
82 | } | |
83 | ||
84 | ||
85 | static ssize_t local_cpulist_show(struct device *dev, | |
86 | struct device_attribute *attr, char *buf) | |
87 | { | |
3be83050 | 88 | const struct cpumask *mask; |
39106dcf MT |
89 | int len; |
90 | ||
3be83050 MT |
91 | mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); |
92 | len = cpulist_scnprintf(buf, PAGE_SIZE-2, mask); | |
39106dcf MT |
93 | buf[len++] = '\n'; |
94 | buf[len] = '\0'; | |
95 | return len; | |
1da177e4 LT |
96 | } |
97 | ||
98 | /* show resources */ | |
99 | static ssize_t | |
e404e274 | 100 | resource_show(struct device * dev, struct device_attribute *attr, char * buf) |
1da177e4 LT |
101 | { |
102 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
103 | char * str = buf; | |
104 | int i; | |
fde09c6d | 105 | int max; |
e31dd6e4 | 106 | resource_size_t start, end; |
1da177e4 LT |
107 | |
108 | if (pci_dev->subordinate) | |
109 | max = DEVICE_COUNT_RESOURCE; | |
fde09c6d YZ |
110 | else |
111 | max = PCI_BRIDGE_RESOURCES; | |
1da177e4 LT |
112 | |
113 | for (i = 0; i < max; i++) { | |
2311b1f2 ME |
114 | struct resource *res = &pci_dev->resource[i]; |
115 | pci_resource_to_user(pci_dev, i, res, &start, &end); | |
116 | str += sprintf(str,"0x%016llx 0x%016llx 0x%016llx\n", | |
117 | (unsigned long long)start, | |
118 | (unsigned long long)end, | |
119 | (unsigned long long)res->flags); | |
1da177e4 LT |
120 | } |
121 | return (str - buf); | |
122 | } | |
123 | ||
87c8a443 | 124 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) |
9888549e GKH |
125 | { |
126 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
127 | ||
128 | return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n", | |
129 | pci_dev->vendor, pci_dev->device, | |
130 | pci_dev->subsystem_vendor, pci_dev->subsystem_device, | |
131 | (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8), | |
132 | (u8)(pci_dev->class)); | |
133 | } | |
bae94d02 IPG |
134 | |
135 | static ssize_t is_enabled_store(struct device *dev, | |
136 | struct device_attribute *attr, const char *buf, | |
137 | size_t count) | |
9f125d30 AV |
138 | { |
139 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 TP |
140 | unsigned long val; |
141 | ssize_t result = strict_strtoul(buf, 0, &val); | |
142 | ||
143 | if (result < 0) | |
144 | return result; | |
9f125d30 AV |
145 | |
146 | /* this can crash the machine when done on the "wrong" device */ | |
147 | if (!capable(CAP_SYS_ADMIN)) | |
92425a40 | 148 | return -EPERM; |
9f125d30 | 149 | |
92425a40 | 150 | if (!val) { |
bae94d02 IPG |
151 | if (atomic_read(&pdev->enable_cnt) != 0) |
152 | pci_disable_device(pdev); | |
153 | else | |
154 | result = -EIO; | |
92425a40 | 155 | } else |
bae94d02 | 156 | result = pci_enable_device(pdev); |
9f125d30 | 157 | |
bae94d02 IPG |
158 | return result < 0 ? result : count; |
159 | } | |
160 | ||
161 | static ssize_t is_enabled_show(struct device *dev, | |
162 | struct device_attribute *attr, char *buf) | |
163 | { | |
164 | struct pci_dev *pdev; | |
9f125d30 | 165 | |
bae94d02 IPG |
166 | pdev = to_pci_dev (dev); |
167 | return sprintf (buf, "%u\n", atomic_read(&pdev->enable_cnt)); | |
9f125d30 AV |
168 | } |
169 | ||
81bb0e19 BG |
170 | #ifdef CONFIG_NUMA |
171 | static ssize_t | |
172 | numa_node_show(struct device *dev, struct device_attribute *attr, char *buf) | |
173 | { | |
174 | return sprintf (buf, "%d\n", dev->numa_node); | |
175 | } | |
176 | #endif | |
177 | ||
fe97064c BG |
178 | static ssize_t |
179 | msi_bus_show(struct device *dev, struct device_attribute *attr, char *buf) | |
180 | { | |
181 | struct pci_dev *pdev = to_pci_dev(dev); | |
182 | ||
183 | if (!pdev->subordinate) | |
184 | return 0; | |
185 | ||
186 | return sprintf (buf, "%u\n", | |
187 | !(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI)); | |
188 | } | |
189 | ||
190 | static ssize_t | |
191 | msi_bus_store(struct device *dev, struct device_attribute *attr, | |
192 | const char *buf, size_t count) | |
193 | { | |
194 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 TP |
195 | unsigned long val; |
196 | ||
197 | if (strict_strtoul(buf, 0, &val) < 0) | |
198 | return -EINVAL; | |
fe97064c BG |
199 | |
200 | /* bad things may happen if the no_msi flag is changed | |
201 | * while some drivers are loaded */ | |
202 | if (!capable(CAP_SYS_ADMIN)) | |
92425a40 | 203 | return -EPERM; |
fe97064c | 204 | |
92425a40 TP |
205 | /* Maybe pci devices without subordinate busses shouldn't even have this |
206 | * attribute in the first place? */ | |
fe97064c BG |
207 | if (!pdev->subordinate) |
208 | return count; | |
209 | ||
92425a40 TP |
210 | /* Is the flag going to change, or keep the value it already had? */ |
211 | if (!(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) ^ | |
212 | !!val) { | |
213 | pdev->subordinate->bus_flags ^= PCI_BUS_FLAGS_NO_MSI; | |
fe97064c | 214 | |
92425a40 TP |
215 | dev_warn(&pdev->dev, "forced subordinate bus to%s support MSI," |
216 | " bad things could happen\n", val ? "" : " not"); | |
fe97064c BG |
217 | } |
218 | ||
219 | return count; | |
220 | } | |
9888549e | 221 | |
705b1aaa AC |
222 | #ifdef CONFIG_HOTPLUG |
223 | static DEFINE_MUTEX(pci_remove_rescan_mutex); | |
224 | static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf, | |
225 | size_t count) | |
226 | { | |
227 | unsigned long val; | |
228 | struct pci_bus *b = NULL; | |
229 | ||
230 | if (strict_strtoul(buf, 0, &val) < 0) | |
231 | return -EINVAL; | |
232 | ||
233 | if (val) { | |
234 | mutex_lock(&pci_remove_rescan_mutex); | |
235 | while ((b = pci_find_next_bus(b)) != NULL) | |
236 | pci_rescan_bus(b); | |
237 | mutex_unlock(&pci_remove_rescan_mutex); | |
238 | } | |
239 | return count; | |
240 | } | |
241 | ||
242 | struct bus_attribute pci_bus_attrs[] = { | |
243 | __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store), | |
244 | __ATTR_NULL | |
245 | }; | |
77c27c7b | 246 | |
738a6396 AC |
247 | static ssize_t |
248 | dev_rescan_store(struct device *dev, struct device_attribute *attr, | |
249 | const char *buf, size_t count) | |
250 | { | |
251 | unsigned long val; | |
252 | struct pci_dev *pdev = to_pci_dev(dev); | |
253 | ||
254 | if (strict_strtoul(buf, 0, &val) < 0) | |
255 | return -EINVAL; | |
256 | ||
257 | if (val) { | |
258 | mutex_lock(&pci_remove_rescan_mutex); | |
259 | pci_rescan_bus(pdev->bus); | |
260 | mutex_unlock(&pci_remove_rescan_mutex); | |
261 | } | |
262 | return count; | |
263 | } | |
264 | ||
77c27c7b AC |
265 | static void remove_callback(struct device *dev) |
266 | { | |
267 | struct pci_dev *pdev = to_pci_dev(dev); | |
268 | ||
269 | mutex_lock(&pci_remove_rescan_mutex); | |
270 | pci_remove_bus_device(pdev); | |
271 | mutex_unlock(&pci_remove_rescan_mutex); | |
272 | } | |
273 | ||
274 | static ssize_t | |
275 | remove_store(struct device *dev, struct device_attribute *dummy, | |
276 | const char *buf, size_t count) | |
277 | { | |
278 | int ret = 0; | |
279 | unsigned long val; | |
280 | struct pci_dev *pdev = to_pci_dev(dev); | |
281 | ||
282 | if (strict_strtoul(buf, 0, &val) < 0) | |
283 | return -EINVAL; | |
284 | ||
285 | if (pci_is_root_bus(pdev->bus)) | |
286 | return -EBUSY; | |
287 | ||
288 | /* An attribute cannot be unregistered by one of its own methods, | |
289 | * so we have to use this roundabout approach. | |
290 | */ | |
291 | if (val) | |
292 | ret = device_schedule_callback(dev, remove_callback); | |
293 | if (ret) | |
294 | count = ret; | |
295 | return count; | |
296 | } | |
705b1aaa AC |
297 | #endif |
298 | ||
1da177e4 LT |
299 | struct device_attribute pci_dev_attrs[] = { |
300 | __ATTR_RO(resource), | |
301 | __ATTR_RO(vendor), | |
302 | __ATTR_RO(device), | |
303 | __ATTR_RO(subsystem_vendor), | |
304 | __ATTR_RO(subsystem_device), | |
305 | __ATTR_RO(class), | |
306 | __ATTR_RO(irq), | |
307 | __ATTR_RO(local_cpus), | |
39106dcf | 308 | __ATTR_RO(local_cpulist), |
9888549e | 309 | __ATTR_RO(modalias), |
81bb0e19 BG |
310 | #ifdef CONFIG_NUMA |
311 | __ATTR_RO(numa_node), | |
312 | #endif | |
9f125d30 | 313 | __ATTR(enable, 0600, is_enabled_show, is_enabled_store), |
bdee9d98 DT |
314 | __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR), |
315 | broken_parity_status_show,broken_parity_status_store), | |
fe97064c | 316 | __ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store), |
77c27c7b AC |
317 | #ifdef CONFIG_HOTPLUG |
318 | __ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store), | |
738a6396 | 319 | __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store), |
77c27c7b | 320 | #endif |
1da177e4 LT |
321 | __ATTR_NULL, |
322 | }; | |
323 | ||
217f45de DA |
324 | static ssize_t |
325 | boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf) | |
326 | { | |
327 | struct pci_dev *pdev = to_pci_dev(dev); | |
328 | ||
329 | return sprintf(buf, "%u\n", | |
330 | !!(pdev->resource[PCI_ROM_RESOURCE].flags & | |
331 | IORESOURCE_ROM_SHADOW)); | |
332 | } | |
333 | struct device_attribute vga_attr = __ATTR_RO(boot_vga); | |
334 | ||
1da177e4 | 335 | static ssize_t |
91a69029 ZR |
336 | pci_read_config(struct kobject *kobj, struct bin_attribute *bin_attr, |
337 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
338 | { |
339 | struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); | |
340 | unsigned int size = 64; | |
341 | loff_t init_off = off; | |
4c0619ad | 342 | u8 *data = (u8*) buf; |
1da177e4 LT |
343 | |
344 | /* Several chips lock up trying to read undefined config space */ | |
345 | if (capable(CAP_SYS_ADMIN)) { | |
346 | size = dev->cfg_size; | |
347 | } else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { | |
348 | size = 128; | |
349 | } | |
350 | ||
351 | if (off > size) | |
352 | return 0; | |
353 | if (off + count > size) { | |
354 | size -= off; | |
355 | count = size; | |
356 | } else { | |
357 | size = count; | |
358 | } | |
359 | ||
4c0619ad SS |
360 | if ((off & 1) && size) { |
361 | u8 val; | |
e04b0ea2 | 362 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 363 | data[off - init_off] = val; |
1da177e4 | 364 | off++; |
4c0619ad SS |
365 | size--; |
366 | } | |
367 | ||
368 | if ((off & 3) && size > 2) { | |
369 | u16 val; | |
e04b0ea2 | 370 | pci_user_read_config_word(dev, off, &val); |
4c0619ad SS |
371 | data[off - init_off] = val & 0xff; |
372 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
373 | off += 2; | |
374 | size -= 2; | |
1da177e4 LT |
375 | } |
376 | ||
377 | while (size > 3) { | |
4c0619ad | 378 | u32 val; |
e04b0ea2 | 379 | pci_user_read_config_dword(dev, off, &val); |
4c0619ad SS |
380 | data[off - init_off] = val & 0xff; |
381 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
382 | data[off - init_off + 2] = (val >> 16) & 0xff; | |
383 | data[off - init_off + 3] = (val >> 24) & 0xff; | |
1da177e4 LT |
384 | off += 4; |
385 | size -= 4; | |
386 | } | |
387 | ||
4c0619ad SS |
388 | if (size >= 2) { |
389 | u16 val; | |
e04b0ea2 | 390 | pci_user_read_config_word(dev, off, &val); |
4c0619ad SS |
391 | data[off - init_off] = val & 0xff; |
392 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
393 | off += 2; | |
394 | size -= 2; | |
395 | } | |
396 | ||
397 | if (size > 0) { | |
398 | u8 val; | |
e04b0ea2 | 399 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 400 | data[off - init_off] = val; |
1da177e4 LT |
401 | off++; |
402 | --size; | |
403 | } | |
404 | ||
405 | return count; | |
406 | } | |
407 | ||
408 | static ssize_t | |
91a69029 ZR |
409 | pci_write_config(struct kobject *kobj, struct bin_attribute *bin_attr, |
410 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
411 | { |
412 | struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); | |
413 | unsigned int size = count; | |
414 | loff_t init_off = off; | |
4c0619ad | 415 | u8 *data = (u8*) buf; |
1da177e4 LT |
416 | |
417 | if (off > dev->cfg_size) | |
418 | return 0; | |
419 | if (off + count > dev->cfg_size) { | |
420 | size = dev->cfg_size - off; | |
421 | count = size; | |
422 | } | |
4c0619ad SS |
423 | |
424 | if ((off & 1) && size) { | |
e04b0ea2 | 425 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 | 426 | off++; |
4c0619ad | 427 | size--; |
1da177e4 | 428 | } |
4c0619ad SS |
429 | |
430 | if ((off & 3) && size > 2) { | |
431 | u16 val = data[off - init_off]; | |
432 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 433 | pci_user_write_config_word(dev, off, val); |
4c0619ad SS |
434 | off += 2; |
435 | size -= 2; | |
436 | } | |
1da177e4 LT |
437 | |
438 | while (size > 3) { | |
4c0619ad SS |
439 | u32 val = data[off - init_off]; |
440 | val |= (u32) data[off - init_off + 1] << 8; | |
441 | val |= (u32) data[off - init_off + 2] << 16; | |
442 | val |= (u32) data[off - init_off + 3] << 24; | |
e04b0ea2 | 443 | pci_user_write_config_dword(dev, off, val); |
1da177e4 LT |
444 | off += 4; |
445 | size -= 4; | |
446 | } | |
4c0619ad SS |
447 | |
448 | if (size >= 2) { | |
449 | u16 val = data[off - init_off]; | |
450 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 451 | pci_user_write_config_word(dev, off, val); |
4c0619ad SS |
452 | off += 2; |
453 | size -= 2; | |
454 | } | |
1da177e4 | 455 | |
4c0619ad | 456 | if (size) { |
e04b0ea2 | 457 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 LT |
458 | off++; |
459 | --size; | |
460 | } | |
461 | ||
462 | return count; | |
463 | } | |
464 | ||
94e61088 | 465 | static ssize_t |
287d19ce SH |
466 | read_vpd_attr(struct kobject *kobj, struct bin_attribute *bin_attr, |
467 | char *buf, loff_t off, size_t count) | |
94e61088 BH |
468 | { |
469 | struct pci_dev *dev = | |
470 | to_pci_dev(container_of(kobj, struct device, kobj)); | |
94e61088 BH |
471 | |
472 | if (off > bin_attr->size) | |
473 | count = 0; | |
474 | else if (count > bin_attr->size - off) | |
475 | count = bin_attr->size - off; | |
94e61088 | 476 | |
287d19ce | 477 | return pci_read_vpd(dev, off, count, buf); |
94e61088 BH |
478 | } |
479 | ||
480 | static ssize_t | |
287d19ce SH |
481 | write_vpd_attr(struct kobject *kobj, struct bin_attribute *bin_attr, |
482 | char *buf, loff_t off, size_t count) | |
94e61088 BH |
483 | { |
484 | struct pci_dev *dev = | |
485 | to_pci_dev(container_of(kobj, struct device, kobj)); | |
94e61088 BH |
486 | |
487 | if (off > bin_attr->size) | |
488 | count = 0; | |
489 | else if (count > bin_attr->size - off) | |
490 | count = bin_attr->size - off; | |
94e61088 | 491 | |
287d19ce | 492 | return pci_write_vpd(dev, off, count, buf); |
94e61088 BH |
493 | } |
494 | ||
1da177e4 LT |
495 | #ifdef HAVE_PCI_LEGACY |
496 | /** | |
497 | * pci_read_legacy_io - read byte(s) from legacy I/O port space | |
498 | * @kobj: kobject corresponding to file to read from | |
499 | * @buf: buffer to store results | |
500 | * @off: offset into legacy I/O port space | |
501 | * @count: number of bytes to read | |
502 | * | |
503 | * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
504 | * callback routine (pci_legacy_read). | |
505 | */ | |
f19aeb1f | 506 | static ssize_t |
91a69029 ZR |
507 | pci_read_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr, |
508 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
509 | { |
510 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 511 | struct device, |
1da177e4 LT |
512 | kobj)); |
513 | ||
514 | /* Only support 1, 2 or 4 byte accesses */ | |
515 | if (count != 1 && count != 2 && count != 4) | |
516 | return -EINVAL; | |
517 | ||
518 | return pci_legacy_read(bus, off, (u32 *)buf, count); | |
519 | } | |
520 | ||
521 | /** | |
522 | * pci_write_legacy_io - write byte(s) to legacy I/O port space | |
523 | * @kobj: kobject corresponding to file to read from | |
524 | * @buf: buffer containing value to be written | |
525 | * @off: offset into legacy I/O port space | |
526 | * @count: number of bytes to write | |
527 | * | |
528 | * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
529 | * callback routine (pci_legacy_write). | |
530 | */ | |
f19aeb1f | 531 | static ssize_t |
91a69029 ZR |
532 | pci_write_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr, |
533 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
534 | { |
535 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 536 | struct device, |
1da177e4 LT |
537 | kobj)); |
538 | /* Only support 1, 2 or 4 byte accesses */ | |
539 | if (count != 1 && count != 2 && count != 4) | |
540 | return -EINVAL; | |
541 | ||
542 | return pci_legacy_write(bus, off, *(u32 *)buf, count); | |
543 | } | |
544 | ||
545 | /** | |
546 | * pci_mmap_legacy_mem - map legacy PCI memory into user memory space | |
547 | * @kobj: kobject corresponding to device to be mapped | |
548 | * @attr: struct bin_attribute for this file | |
549 | * @vma: struct vm_area_struct passed to mmap | |
550 | * | |
f19aeb1f | 551 | * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap |
1da177e4 LT |
552 | * legacy memory space (first meg of bus space) into application virtual |
553 | * memory space. | |
554 | */ | |
f19aeb1f | 555 | static int |
1da177e4 LT |
556 | pci_mmap_legacy_mem(struct kobject *kobj, struct bin_attribute *attr, |
557 | struct vm_area_struct *vma) | |
558 | { | |
559 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 560 | struct device, |
1da177e4 LT |
561 | kobj)); |
562 | ||
f19aeb1f BH |
563 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem); |
564 | } | |
565 | ||
566 | /** | |
567 | * pci_mmap_legacy_io - map legacy PCI IO into user memory space | |
568 | * @kobj: kobject corresponding to device to be mapped | |
569 | * @attr: struct bin_attribute for this file | |
570 | * @vma: struct vm_area_struct passed to mmap | |
571 | * | |
572 | * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap | |
573 | * legacy IO space (first meg of bus space) into application virtual | |
574 | * memory space. Returns -ENOSYS if the operation isn't supported | |
575 | */ | |
576 | static int | |
577 | pci_mmap_legacy_io(struct kobject *kobj, struct bin_attribute *attr, | |
578 | struct vm_area_struct *vma) | |
579 | { | |
580 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
581 | struct device, | |
582 | kobj)); | |
583 | ||
584 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io); | |
585 | } | |
586 | ||
10a0ef39 IK |
587 | /** |
588 | * pci_adjust_legacy_attr - adjustment of legacy file attributes | |
589 | * @b: bus to create files under | |
590 | * @mmap_type: I/O port or memory | |
591 | * | |
592 | * Stub implementation. Can be overridden by arch if necessary. | |
593 | */ | |
594 | void __weak | |
595 | pci_adjust_legacy_attr(struct pci_bus *b, enum pci_mmap_state mmap_type) | |
596 | { | |
597 | return; | |
598 | } | |
599 | ||
f19aeb1f BH |
600 | /** |
601 | * pci_create_legacy_files - create legacy I/O port and memory files | |
602 | * @b: bus to create files under | |
603 | * | |
604 | * Some platforms allow access to legacy I/O port and ISA memory space on | |
605 | * a per-bus basis. This routine creates the files and ties them into | |
606 | * their associated read, write and mmap files from pci-sysfs.c | |
607 | * | |
608 | * On error unwind, but don't propogate the error to the caller | |
609 | * as it is ok to set up the PCI bus without these files. | |
610 | */ | |
611 | void pci_create_legacy_files(struct pci_bus *b) | |
612 | { | |
613 | int error; | |
614 | ||
615 | b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2, | |
616 | GFP_ATOMIC); | |
617 | if (!b->legacy_io) | |
618 | goto kzalloc_err; | |
619 | ||
620 | b->legacy_io->attr.name = "legacy_io"; | |
621 | b->legacy_io->size = 0xffff; | |
622 | b->legacy_io->attr.mode = S_IRUSR | S_IWUSR; | |
623 | b->legacy_io->read = pci_read_legacy_io; | |
624 | b->legacy_io->write = pci_write_legacy_io; | |
625 | b->legacy_io->mmap = pci_mmap_legacy_io; | |
10a0ef39 | 626 | pci_adjust_legacy_attr(b, pci_mmap_io); |
f19aeb1f BH |
627 | error = device_create_bin_file(&b->dev, b->legacy_io); |
628 | if (error) | |
629 | goto legacy_io_err; | |
630 | ||
631 | /* Allocated above after the legacy_io struct */ | |
632 | b->legacy_mem = b->legacy_io + 1; | |
633 | b->legacy_mem->attr.name = "legacy_mem"; | |
634 | b->legacy_mem->size = 1024*1024; | |
635 | b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR; | |
636 | b->legacy_mem->mmap = pci_mmap_legacy_mem; | |
10a0ef39 | 637 | pci_adjust_legacy_attr(b, pci_mmap_mem); |
f19aeb1f BH |
638 | error = device_create_bin_file(&b->dev, b->legacy_mem); |
639 | if (error) | |
640 | goto legacy_mem_err; | |
641 | ||
642 | return; | |
643 | ||
644 | legacy_mem_err: | |
645 | device_remove_bin_file(&b->dev, b->legacy_io); | |
646 | legacy_io_err: | |
647 | kfree(b->legacy_io); | |
648 | b->legacy_io = NULL; | |
649 | kzalloc_err: | |
650 | printk(KERN_WARNING "pci: warning: could not create legacy I/O port " | |
651 | "and ISA memory resources to sysfs\n"); | |
652 | return; | |
653 | } | |
654 | ||
655 | void pci_remove_legacy_files(struct pci_bus *b) | |
656 | { | |
657 | if (b->legacy_io) { | |
658 | device_remove_bin_file(&b->dev, b->legacy_io); | |
659 | device_remove_bin_file(&b->dev, b->legacy_mem); | |
660 | kfree(b->legacy_io); /* both are allocated here */ | |
661 | } | |
1da177e4 LT |
662 | } |
663 | #endif /* HAVE_PCI_LEGACY */ | |
664 | ||
665 | #ifdef HAVE_PCI_MMAP | |
b5ff7df3 | 666 | |
9eff02e2 | 667 | int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma) |
b5ff7df3 LT |
668 | { |
669 | unsigned long nr, start, size; | |
670 | ||
671 | nr = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; | |
672 | start = vma->vm_pgoff; | |
88e7df0b | 673 | size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1; |
b5ff7df3 LT |
674 | if (start < size && size - start >= nr) |
675 | return 1; | |
676 | WARN(1, "process \"%s\" tried to map 0x%08lx-0x%08lx on %s BAR %d (size 0x%08lx)\n", | |
677 | current->comm, start, start+nr, pci_name(pdev), resno, size); | |
678 | return 0; | |
679 | } | |
680 | ||
1da177e4 LT |
681 | /** |
682 | * pci_mmap_resource - map a PCI resource into user memory space | |
683 | * @kobj: kobject for mapping | |
684 | * @attr: struct bin_attribute for the file being mapped | |
685 | * @vma: struct vm_area_struct passed into the mmap | |
45aec1ae | 686 | * @write_combine: 1 for write_combine mapping |
1da177e4 LT |
687 | * |
688 | * Use the regular PCI mapping routines to map a PCI resource into userspace. | |
1da177e4 LT |
689 | */ |
690 | static int | |
691 | pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr, | |
45aec1ae | 692 | struct vm_area_struct *vma, int write_combine) |
1da177e4 LT |
693 | { |
694 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, | |
695 | struct device, kobj)); | |
696 | struct resource *res = (struct resource *)attr->private; | |
697 | enum pci_mmap_state mmap_type; | |
e31dd6e4 | 698 | resource_size_t start, end; |
2311b1f2 | 699 | int i; |
1da177e4 | 700 | |
2311b1f2 ME |
701 | for (i = 0; i < PCI_ROM_RESOURCE; i++) |
702 | if (res == &pdev->resource[i]) | |
703 | break; | |
704 | if (i >= PCI_ROM_RESOURCE) | |
705 | return -ENODEV; | |
706 | ||
b5ff7df3 LT |
707 | if (!pci_mmap_fits(pdev, i, vma)) |
708 | return -EINVAL; | |
709 | ||
2311b1f2 ME |
710 | /* pci_mmap_page_range() expects the same kind of entry as coming |
711 | * from /proc/bus/pci/ which is a "user visible" value. If this is | |
712 | * different from the resource itself, arch will do necessary fixup. | |
713 | */ | |
714 | pci_resource_to_user(pdev, i, res, &start, &end); | |
715 | vma->vm_pgoff += start >> PAGE_SHIFT; | |
1da177e4 LT |
716 | mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io; |
717 | ||
e8de1481 AV |
718 | if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(start)) |
719 | return -EINVAL; | |
720 | ||
45aec1ae | 721 | return pci_mmap_page_range(pdev, vma, mmap_type, write_combine); |
722 | } | |
723 | ||
724 | static int | |
725 | pci_mmap_resource_uc(struct kobject *kobj, struct bin_attribute *attr, | |
726 | struct vm_area_struct *vma) | |
727 | { | |
728 | return pci_mmap_resource(kobj, attr, vma, 0); | |
729 | } | |
730 | ||
731 | static int | |
732 | pci_mmap_resource_wc(struct kobject *kobj, struct bin_attribute *attr, | |
733 | struct vm_area_struct *vma) | |
734 | { | |
735 | return pci_mmap_resource(kobj, attr, vma, 1); | |
1da177e4 LT |
736 | } |
737 | ||
b19441af GKH |
738 | /** |
739 | * pci_remove_resource_files - cleanup resource files | |
740 | * @dev: dev to cleanup | |
741 | * | |
742 | * If we created resource files for @dev, remove them from sysfs and | |
743 | * free their resources. | |
744 | */ | |
745 | static void | |
746 | pci_remove_resource_files(struct pci_dev *pdev) | |
747 | { | |
748 | int i; | |
749 | ||
750 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
751 | struct bin_attribute *res_attr; | |
752 | ||
753 | res_attr = pdev->res_attr[i]; | |
754 | if (res_attr) { | |
755 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
756 | kfree(res_attr); | |
757 | } | |
45aec1ae | 758 | |
759 | res_attr = pdev->res_attr_wc[i]; | |
760 | if (res_attr) { | |
761 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
762 | kfree(res_attr); | |
763 | } | |
b19441af GKH |
764 | } |
765 | } | |
766 | ||
45aec1ae | 767 | static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine) |
768 | { | |
769 | /* allocate attribute structure, piggyback attribute name */ | |
770 | int name_len = write_combine ? 13 : 10; | |
771 | struct bin_attribute *res_attr; | |
772 | int retval; | |
773 | ||
774 | res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC); | |
775 | if (res_attr) { | |
776 | char *res_attr_name = (char *)(res_attr + 1); | |
777 | ||
778 | if (write_combine) { | |
779 | pdev->res_attr_wc[num] = res_attr; | |
780 | sprintf(res_attr_name, "resource%d_wc", num); | |
781 | res_attr->mmap = pci_mmap_resource_wc; | |
782 | } else { | |
783 | pdev->res_attr[num] = res_attr; | |
784 | sprintf(res_attr_name, "resource%d", num); | |
785 | res_attr->mmap = pci_mmap_resource_uc; | |
786 | } | |
787 | res_attr->attr.name = res_attr_name; | |
788 | res_attr->attr.mode = S_IRUSR | S_IWUSR; | |
789 | res_attr->size = pci_resource_len(pdev, num); | |
790 | res_attr->private = &pdev->resource[num]; | |
791 | retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr); | |
792 | } else | |
793 | retval = -ENOMEM; | |
794 | ||
795 | return retval; | |
796 | } | |
797 | ||
1da177e4 LT |
798 | /** |
799 | * pci_create_resource_files - create resource files in sysfs for @dev | |
800 | * @dev: dev in question | |
801 | * | |
802 | * Walk the resources in @dev creating files for each resource available. | |
803 | */ | |
b19441af | 804 | static int pci_create_resource_files(struct pci_dev *pdev) |
1da177e4 LT |
805 | { |
806 | int i; | |
b19441af | 807 | int retval; |
1da177e4 LT |
808 | |
809 | /* Expose the PCI resources from this device as files */ | |
810 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
1da177e4 LT |
811 | |
812 | /* skip empty resources */ | |
813 | if (!pci_resource_len(pdev, i)) | |
814 | continue; | |
815 | ||
45aec1ae | 816 | retval = pci_create_attr(pdev, i, 0); |
817 | /* for prefetchable resources, create a WC mappable file */ | |
818 | if (!retval && pdev->resource[i].flags & IORESOURCE_PREFETCH) | |
819 | retval = pci_create_attr(pdev, i, 1); | |
820 | ||
821 | if (retval) { | |
822 | pci_remove_resource_files(pdev); | |
823 | return retval; | |
1da177e4 LT |
824 | } |
825 | } | |
b19441af | 826 | return 0; |
1da177e4 LT |
827 | } |
828 | #else /* !HAVE_PCI_MMAP */ | |
10a0ef39 IK |
829 | int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; } |
830 | void __weak pci_remove_resource_files(struct pci_dev *dev) { return; } | |
1da177e4 LT |
831 | #endif /* HAVE_PCI_MMAP */ |
832 | ||
833 | /** | |
834 | * pci_write_rom - used to enable access to the PCI ROM display | |
835 | * @kobj: kernel object handle | |
836 | * @buf: user input | |
837 | * @off: file offset | |
838 | * @count: number of byte in input | |
839 | * | |
840 | * writing anything except 0 enables it | |
841 | */ | |
842 | static ssize_t | |
91a69029 ZR |
843 | pci_write_rom(struct kobject *kobj, struct bin_attribute *bin_attr, |
844 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
845 | { |
846 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj)); | |
847 | ||
848 | if ((off == 0) && (*buf == '0') && (count == 2)) | |
849 | pdev->rom_attr_enabled = 0; | |
850 | else | |
851 | pdev->rom_attr_enabled = 1; | |
852 | ||
853 | return count; | |
854 | } | |
855 | ||
856 | /** | |
857 | * pci_read_rom - read a PCI ROM | |
858 | * @kobj: kernel object handle | |
859 | * @buf: where to put the data we read from the ROM | |
860 | * @off: file offset | |
861 | * @count: number of bytes to read | |
862 | * | |
863 | * Put @count bytes starting at @off into @buf from the ROM in the PCI | |
864 | * device corresponding to @kobj. | |
865 | */ | |
866 | static ssize_t | |
91a69029 ZR |
867 | pci_read_rom(struct kobject *kobj, struct bin_attribute *bin_attr, |
868 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
869 | { |
870 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj)); | |
871 | void __iomem *rom; | |
872 | size_t size; | |
873 | ||
874 | if (!pdev->rom_attr_enabled) | |
875 | return -EINVAL; | |
876 | ||
877 | rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */ | |
97c44836 TN |
878 | if (!rom || !size) |
879 | return -EIO; | |
1da177e4 LT |
880 | |
881 | if (off >= size) | |
882 | count = 0; | |
883 | else { | |
884 | if (off + count > size) | |
885 | count = size - off; | |
886 | ||
887 | memcpy_fromio(buf, rom + off, count); | |
888 | } | |
889 | pci_unmap_rom(pdev, rom); | |
890 | ||
891 | return count; | |
892 | } | |
893 | ||
894 | static struct bin_attribute pci_config_attr = { | |
895 | .attr = { | |
896 | .name = "config", | |
897 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 898 | }, |
557848c3 | 899 | .size = PCI_CFG_SPACE_SIZE, |
1da177e4 LT |
900 | .read = pci_read_config, |
901 | .write = pci_write_config, | |
902 | }; | |
903 | ||
904 | static struct bin_attribute pcie_config_attr = { | |
905 | .attr = { | |
906 | .name = "config", | |
907 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 908 | }, |
557848c3 | 909 | .size = PCI_CFG_SPACE_EXP_SIZE, |
1da177e4 LT |
910 | .read = pci_read_config, |
911 | .write = pci_write_config, | |
912 | }; | |
913 | ||
a2cd52ca | 914 | int __attribute__ ((weak)) pcibios_add_platform_entries(struct pci_dev *dev) |
575e3348 | 915 | { |
a2cd52ca | 916 | return 0; |
575e3348 ME |
917 | } |
918 | ||
280c73d3 ZY |
919 | static int pci_create_capabilities_sysfs(struct pci_dev *dev) |
920 | { | |
921 | int retval; | |
922 | struct bin_attribute *attr; | |
923 | ||
924 | /* If the device has VPD, try to expose it in sysfs. */ | |
925 | if (dev->vpd) { | |
926 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); | |
927 | if (!attr) | |
928 | return -ENOMEM; | |
929 | ||
930 | attr->size = dev->vpd->len; | |
931 | attr->attr.name = "vpd"; | |
932 | attr->attr.mode = S_IRUSR | S_IWUSR; | |
287d19ce SH |
933 | attr->read = read_vpd_attr; |
934 | attr->write = write_vpd_attr; | |
280c73d3 ZY |
935 | retval = sysfs_create_bin_file(&dev->dev.kobj, attr); |
936 | if (retval) { | |
937 | kfree(dev->vpd->attr); | |
938 | return retval; | |
939 | } | |
940 | dev->vpd->attr = attr; | |
941 | } | |
942 | ||
943 | /* Active State Power Management */ | |
944 | pcie_aspm_create_sysfs_dev_files(dev); | |
945 | ||
946 | return 0; | |
947 | } | |
948 | ||
b19441af | 949 | int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev) |
1da177e4 | 950 | { |
b19441af | 951 | int retval; |
280c73d3 ZY |
952 | int rom_size = 0; |
953 | struct bin_attribute *attr; | |
b19441af | 954 | |
1da177e4 LT |
955 | if (!sysfs_initialized) |
956 | return -EACCES; | |
957 | ||
557848c3 | 958 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
b19441af | 959 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1da177e4 | 960 | else |
b19441af GKH |
961 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
962 | if (retval) | |
963 | goto err; | |
1da177e4 | 964 | |
b19441af GKH |
965 | retval = pci_create_resource_files(pdev); |
966 | if (retval) | |
280c73d3 ZY |
967 | goto err_config_file; |
968 | ||
969 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) | |
970 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); | |
971 | else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW) | |
972 | rom_size = 0x20000; | |
1da177e4 LT |
973 | |
974 | /* If the device has a ROM, try to expose it in sysfs. */ | |
280c73d3 | 975 | if (rom_size) { |
94e61088 | 976 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); |
280c73d3 | 977 | if (!attr) { |
b19441af | 978 | retval = -ENOMEM; |
9890b12a | 979 | goto err_resource_files; |
1da177e4 | 980 | } |
280c73d3 ZY |
981 | attr->size = rom_size; |
982 | attr->attr.name = "rom"; | |
983 | attr->attr.mode = S_IRUSR; | |
984 | attr->read = pci_read_rom; | |
985 | attr->write = pci_write_rom; | |
986 | retval = sysfs_create_bin_file(&pdev->dev.kobj, attr); | |
987 | if (retval) { | |
988 | kfree(attr); | |
989 | goto err_resource_files; | |
990 | } | |
991 | pdev->rom_attr = attr; | |
1da177e4 | 992 | } |
280c73d3 | 993 | |
217f45de DA |
994 | if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) { |
995 | retval = device_create_file(&pdev->dev, &vga_attr); | |
996 | if (retval) | |
997 | goto err_rom_file; | |
998 | } | |
999 | ||
1da177e4 | 1000 | /* add platform-specific attributes */ |
280c73d3 ZY |
1001 | retval = pcibios_add_platform_entries(pdev); |
1002 | if (retval) | |
217f45de | 1003 | goto err_vga_file; |
b19441af | 1004 | |
280c73d3 ZY |
1005 | /* add sysfs entries for various capabilities */ |
1006 | retval = pci_create_capabilities_sysfs(pdev); | |
1007 | if (retval) | |
217f45de | 1008 | goto err_vga_file; |
7d715a6c | 1009 | |
1da177e4 | 1010 | return 0; |
b19441af | 1011 | |
217f45de DA |
1012 | err_vga_file: |
1013 | if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) | |
1014 | device_remove_file(&pdev->dev, &vga_attr); | |
a2cd52ca | 1015 | err_rom_file: |
280c73d3 | 1016 | if (rom_size) { |
94e61088 | 1017 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); |
280c73d3 ZY |
1018 | kfree(pdev->rom_attr); |
1019 | pdev->rom_attr = NULL; | |
1020 | } | |
9890b12a ME |
1021 | err_resource_files: |
1022 | pci_remove_resource_files(pdev); | |
94e61088 | 1023 | err_config_file: |
557848c3 | 1024 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
b19441af GKH |
1025 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1026 | else | |
1027 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); | |
1028 | err: | |
1029 | return retval; | |
1da177e4 LT |
1030 | } |
1031 | ||
280c73d3 ZY |
1032 | static void pci_remove_capabilities_sysfs(struct pci_dev *dev) |
1033 | { | |
1034 | if (dev->vpd && dev->vpd->attr) { | |
1035 | sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr); | |
1036 | kfree(dev->vpd->attr); | |
1037 | } | |
1038 | ||
1039 | pcie_aspm_remove_sysfs_dev_files(dev); | |
1040 | } | |
1041 | ||
1da177e4 LT |
1042 | /** |
1043 | * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files | |
1044 | * @pdev: device whose entries we should free | |
1045 | * | |
1046 | * Cleanup when @pdev is removed from sysfs. | |
1047 | */ | |
1048 | void pci_remove_sysfs_dev_files(struct pci_dev *pdev) | |
1049 | { | |
280c73d3 ZY |
1050 | int rom_size = 0; |
1051 | ||
d67afe5e DM |
1052 | if (!sysfs_initialized) |
1053 | return; | |
1054 | ||
280c73d3 | 1055 | pci_remove_capabilities_sysfs(pdev); |
7d715a6c | 1056 | |
557848c3 | 1057 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
1da177e4 LT |
1058 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1059 | else | |
1060 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); | |
1061 | ||
1062 | pci_remove_resource_files(pdev); | |
1063 | ||
280c73d3 ZY |
1064 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) |
1065 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); | |
1066 | else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW) | |
1067 | rom_size = 0x20000; | |
1068 | ||
1069 | if (rom_size && pdev->rom_attr) { | |
1070 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); | |
1071 | kfree(pdev->rom_attr); | |
1da177e4 LT |
1072 | } |
1073 | } | |
1074 | ||
1075 | static int __init pci_sysfs_init(void) | |
1076 | { | |
1077 | struct pci_dev *pdev = NULL; | |
b19441af GKH |
1078 | int retval; |
1079 | ||
1da177e4 | 1080 | sysfs_initialized = 1; |
b19441af GKH |
1081 | for_each_pci_dev(pdev) { |
1082 | retval = pci_create_sysfs_dev_files(pdev); | |
151fc5df JL |
1083 | if (retval) { |
1084 | pci_dev_put(pdev); | |
b19441af | 1085 | return retval; |
151fc5df | 1086 | } |
b19441af | 1087 | } |
1da177e4 LT |
1088 | |
1089 | return 0; | |
1090 | } | |
1091 | ||
40ee9e9f | 1092 | late_initcall(pci_sysfs_init); |