Commit | Line | Data |
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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 | ||
18 | #include <linux/config.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/pci.h> | |
21 | #include <linux/stat.h> | |
22 | #include <linux/topology.h> | |
23 | #include <linux/mm.h> | |
24 | ||
25 | #include "pci.h" | |
26 | ||
27 | static int sysfs_initialized; /* = 0 */ | |
28 | ||
29 | /* show configuration fields */ | |
30 | #define pci_config_attr(field, format_string) \ | |
31 | static ssize_t \ | |
e404e274 | 32 | field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
33 | { \ |
34 | struct pci_dev *pdev; \ | |
35 | \ | |
36 | pdev = to_pci_dev (dev); \ | |
37 | return sprintf (buf, format_string, pdev->field); \ | |
38 | } | |
39 | ||
40 | pci_config_attr(vendor, "0x%04x\n"); | |
41 | pci_config_attr(device, "0x%04x\n"); | |
42 | pci_config_attr(subsystem_vendor, "0x%04x\n"); | |
43 | pci_config_attr(subsystem_device, "0x%04x\n"); | |
44 | pci_config_attr(class, "0x%06x\n"); | |
45 | pci_config_attr(irq, "%u\n"); | |
9f125d30 | 46 | pci_config_attr(is_enabled, "%u\n"); |
1da177e4 | 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); | |
61 | ssize_t consumed = -EINVAL; | |
62 | ||
63 | if ((count > 0) && (*buf == '0' || *buf == '1')) { | |
64 | pdev->broken_parity_status = *buf == '1' ? 1 : 0; | |
65 | consumed = count; | |
66 | } | |
67 | return consumed; | |
68 | } | |
69 | ||
4327edf6 AC |
70 | static ssize_t local_cpus_show(struct device *dev, |
71 | struct device_attribute *attr, char *buf) | |
1da177e4 | 72 | { |
4327edf6 AC |
73 | cpumask_t mask; |
74 | int len; | |
75 | ||
76 | mask = pcibus_to_cpumask(to_pci_dev(dev)->bus); | |
77 | len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask); | |
1da177e4 LT |
78 | strcat(buf,"\n"); |
79 | return 1+len; | |
80 | } | |
81 | ||
82 | /* show resources */ | |
83 | static ssize_t | |
e404e274 | 84 | resource_show(struct device * dev, struct device_attribute *attr, char * buf) |
1da177e4 LT |
85 | { |
86 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
87 | char * str = buf; | |
88 | int i; | |
89 | int max = 7; | |
2311b1f2 | 90 | u64 start, end; |
1da177e4 LT |
91 | |
92 | if (pci_dev->subordinate) | |
93 | max = DEVICE_COUNT_RESOURCE; | |
94 | ||
95 | for (i = 0; i < max; i++) { | |
2311b1f2 ME |
96 | struct resource *res = &pci_dev->resource[i]; |
97 | pci_resource_to_user(pci_dev, i, res, &start, &end); | |
98 | str += sprintf(str,"0x%016llx 0x%016llx 0x%016llx\n", | |
99 | (unsigned long long)start, | |
100 | (unsigned long long)end, | |
101 | (unsigned long long)res->flags); | |
1da177e4 LT |
102 | } |
103 | return (str - buf); | |
104 | } | |
105 | ||
87c8a443 | 106 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) |
9888549e GK |
107 | { |
108 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
109 | ||
110 | return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n", | |
111 | pci_dev->vendor, pci_dev->device, | |
112 | pci_dev->subsystem_vendor, pci_dev->subsystem_device, | |
113 | (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8), | |
114 | (u8)(pci_dev->class)); | |
115 | } | |
9f125d30 AV |
116 | static ssize_t |
117 | is_enabled_store(struct device *dev, struct device_attribute *attr, | |
118 | const char *buf, size_t count) | |
119 | { | |
120 | struct pci_dev *pdev = to_pci_dev(dev); | |
121 | ||
122 | /* this can crash the machine when done on the "wrong" device */ | |
123 | if (!capable(CAP_SYS_ADMIN)) | |
124 | return count; | |
125 | ||
126 | if (*buf == '0') | |
127 | pci_disable_device(pdev); | |
128 | ||
129 | if (*buf == '1') | |
130 | pci_enable_device(pdev); | |
131 | ||
132 | return count; | |
133 | } | |
134 | ||
9888549e | 135 | |
1da177e4 LT |
136 | struct device_attribute pci_dev_attrs[] = { |
137 | __ATTR_RO(resource), | |
138 | __ATTR_RO(vendor), | |
139 | __ATTR_RO(device), | |
140 | __ATTR_RO(subsystem_vendor), | |
141 | __ATTR_RO(subsystem_device), | |
142 | __ATTR_RO(class), | |
143 | __ATTR_RO(irq), | |
144 | __ATTR_RO(local_cpus), | |
9888549e | 145 | __ATTR_RO(modalias), |
9f125d30 | 146 | __ATTR(enable, 0600, is_enabled_show, is_enabled_store), |
bdee9d98 DT |
147 | __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR), |
148 | broken_parity_status_show,broken_parity_status_store), | |
1da177e4 LT |
149 | __ATTR_NULL, |
150 | }; | |
151 | ||
152 | static ssize_t | |
153 | pci_read_config(struct kobject *kobj, char *buf, loff_t off, size_t count) | |
154 | { | |
155 | struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); | |
156 | unsigned int size = 64; | |
157 | loff_t init_off = off; | |
4c0619ad | 158 | u8 *data = (u8*) buf; |
1da177e4 LT |
159 | |
160 | /* Several chips lock up trying to read undefined config space */ | |
161 | if (capable(CAP_SYS_ADMIN)) { | |
162 | size = dev->cfg_size; | |
163 | } else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { | |
164 | size = 128; | |
165 | } | |
166 | ||
167 | if (off > size) | |
168 | return 0; | |
169 | if (off + count > size) { | |
170 | size -= off; | |
171 | count = size; | |
172 | } else { | |
173 | size = count; | |
174 | } | |
175 | ||
4c0619ad | 176 | if ((off & 1) && size) { |
177 | u8 val; | |
e04b0ea2 | 178 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 179 | data[off - init_off] = val; |
1da177e4 | 180 | off++; |
4c0619ad | 181 | size--; |
182 | } | |
183 | ||
184 | if ((off & 3) && size > 2) { | |
185 | u16 val; | |
e04b0ea2 | 186 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 187 | data[off - init_off] = val & 0xff; |
188 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
189 | off += 2; | |
190 | size -= 2; | |
1da177e4 LT |
191 | } |
192 | ||
193 | while (size > 3) { | |
4c0619ad | 194 | u32 val; |
e04b0ea2 | 195 | pci_user_read_config_dword(dev, off, &val); |
4c0619ad | 196 | data[off - init_off] = val & 0xff; |
197 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
198 | data[off - init_off + 2] = (val >> 16) & 0xff; | |
199 | data[off - init_off + 3] = (val >> 24) & 0xff; | |
1da177e4 LT |
200 | off += 4; |
201 | size -= 4; | |
202 | } | |
203 | ||
4c0619ad | 204 | if (size >= 2) { |
205 | u16 val; | |
e04b0ea2 | 206 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 207 | data[off - init_off] = val & 0xff; |
208 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
209 | off += 2; | |
210 | size -= 2; | |
211 | } | |
212 | ||
213 | if (size > 0) { | |
214 | u8 val; | |
e04b0ea2 | 215 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 216 | data[off - init_off] = val; |
1da177e4 LT |
217 | off++; |
218 | --size; | |
219 | } | |
220 | ||
221 | return count; | |
222 | } | |
223 | ||
224 | static ssize_t | |
225 | pci_write_config(struct kobject *kobj, char *buf, loff_t off, size_t count) | |
226 | { | |
227 | struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); | |
228 | unsigned int size = count; | |
229 | loff_t init_off = off; | |
4c0619ad | 230 | u8 *data = (u8*) buf; |
1da177e4 LT |
231 | |
232 | if (off > dev->cfg_size) | |
233 | return 0; | |
234 | if (off + count > dev->cfg_size) { | |
235 | size = dev->cfg_size - off; | |
236 | count = size; | |
237 | } | |
4c0619ad | 238 | |
239 | if ((off & 1) && size) { | |
e04b0ea2 | 240 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 | 241 | off++; |
4c0619ad | 242 | size--; |
1da177e4 | 243 | } |
4c0619ad | 244 | |
245 | if ((off & 3) && size > 2) { | |
246 | u16 val = data[off - init_off]; | |
247 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 248 | pci_user_write_config_word(dev, off, val); |
4c0619ad | 249 | off += 2; |
250 | size -= 2; | |
251 | } | |
1da177e4 LT |
252 | |
253 | while (size > 3) { | |
4c0619ad | 254 | u32 val = data[off - init_off]; |
255 | val |= (u32) data[off - init_off + 1] << 8; | |
256 | val |= (u32) data[off - init_off + 2] << 16; | |
257 | val |= (u32) data[off - init_off + 3] << 24; | |
e04b0ea2 | 258 | pci_user_write_config_dword(dev, off, val); |
1da177e4 LT |
259 | off += 4; |
260 | size -= 4; | |
261 | } | |
4c0619ad | 262 | |
263 | if (size >= 2) { | |
264 | u16 val = data[off - init_off]; | |
265 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 266 | pci_user_write_config_word(dev, off, val); |
4c0619ad | 267 | off += 2; |
268 | size -= 2; | |
269 | } | |
1da177e4 | 270 | |
4c0619ad | 271 | if (size) { |
e04b0ea2 | 272 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 LT |
273 | off++; |
274 | --size; | |
275 | } | |
276 | ||
277 | return count; | |
278 | } | |
279 | ||
280 | #ifdef HAVE_PCI_LEGACY | |
281 | /** | |
282 | * pci_read_legacy_io - read byte(s) from legacy I/O port space | |
283 | * @kobj: kobject corresponding to file to read from | |
284 | * @buf: buffer to store results | |
285 | * @off: offset into legacy I/O port space | |
286 | * @count: number of bytes to read | |
287 | * | |
288 | * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
289 | * callback routine (pci_legacy_read). | |
290 | */ | |
291 | ssize_t | |
292 | pci_read_legacy_io(struct kobject *kobj, char *buf, loff_t off, size_t count) | |
293 | { | |
294 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
295 | struct class_device, | |
296 | kobj)); | |
297 | ||
298 | /* Only support 1, 2 or 4 byte accesses */ | |
299 | if (count != 1 && count != 2 && count != 4) | |
300 | return -EINVAL; | |
301 | ||
302 | return pci_legacy_read(bus, off, (u32 *)buf, count); | |
303 | } | |
304 | ||
305 | /** | |
306 | * pci_write_legacy_io - write byte(s) to legacy I/O port space | |
307 | * @kobj: kobject corresponding to file to read from | |
308 | * @buf: buffer containing value to be written | |
309 | * @off: offset into legacy I/O port space | |
310 | * @count: number of bytes to write | |
311 | * | |
312 | * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
313 | * callback routine (pci_legacy_write). | |
314 | */ | |
315 | ssize_t | |
316 | pci_write_legacy_io(struct kobject *kobj, char *buf, loff_t off, size_t count) | |
317 | { | |
318 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
319 | struct class_device, | |
320 | kobj)); | |
321 | /* Only support 1, 2 or 4 byte accesses */ | |
322 | if (count != 1 && count != 2 && count != 4) | |
323 | return -EINVAL; | |
324 | ||
325 | return pci_legacy_write(bus, off, *(u32 *)buf, count); | |
326 | } | |
327 | ||
328 | /** | |
329 | * pci_mmap_legacy_mem - map legacy PCI memory into user memory space | |
330 | * @kobj: kobject corresponding to device to be mapped | |
331 | * @attr: struct bin_attribute for this file | |
332 | * @vma: struct vm_area_struct passed to mmap | |
333 | * | |
334 | * Uses an arch specific callback, pci_mmap_legacy_page_range, to mmap | |
335 | * legacy memory space (first meg of bus space) into application virtual | |
336 | * memory space. | |
337 | */ | |
338 | int | |
339 | pci_mmap_legacy_mem(struct kobject *kobj, struct bin_attribute *attr, | |
340 | struct vm_area_struct *vma) | |
341 | { | |
342 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
343 | struct class_device, | |
344 | kobj)); | |
345 | ||
346 | return pci_mmap_legacy_page_range(bus, vma); | |
347 | } | |
348 | #endif /* HAVE_PCI_LEGACY */ | |
349 | ||
350 | #ifdef HAVE_PCI_MMAP | |
351 | /** | |
352 | * pci_mmap_resource - map a PCI resource into user memory space | |
353 | * @kobj: kobject for mapping | |
354 | * @attr: struct bin_attribute for the file being mapped | |
355 | * @vma: struct vm_area_struct passed into the mmap | |
356 | * | |
357 | * Use the regular PCI mapping routines to map a PCI resource into userspace. | |
358 | * FIXME: write combining? maybe automatic for prefetchable regions? | |
359 | */ | |
360 | static int | |
361 | pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr, | |
362 | struct vm_area_struct *vma) | |
363 | { | |
364 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, | |
365 | struct device, kobj)); | |
366 | struct resource *res = (struct resource *)attr->private; | |
367 | enum pci_mmap_state mmap_type; | |
2311b1f2 ME |
368 | u64 start, end; |
369 | int i; | |
1da177e4 | 370 | |
2311b1f2 ME |
371 | for (i = 0; i < PCI_ROM_RESOURCE; i++) |
372 | if (res == &pdev->resource[i]) | |
373 | break; | |
374 | if (i >= PCI_ROM_RESOURCE) | |
375 | return -ENODEV; | |
376 | ||
377 | /* pci_mmap_page_range() expects the same kind of entry as coming | |
378 | * from /proc/bus/pci/ which is a "user visible" value. If this is | |
379 | * different from the resource itself, arch will do necessary fixup. | |
380 | */ | |
381 | pci_resource_to_user(pdev, i, res, &start, &end); | |
382 | vma->vm_pgoff += start >> PAGE_SHIFT; | |
1da177e4 LT |
383 | mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io; |
384 | ||
385 | return pci_mmap_page_range(pdev, vma, mmap_type, 0); | |
386 | } | |
387 | ||
388 | /** | |
389 | * pci_create_resource_files - create resource files in sysfs for @dev | |
390 | * @dev: dev in question | |
391 | * | |
392 | * Walk the resources in @dev creating files for each resource available. | |
393 | */ | |
394 | static void | |
395 | pci_create_resource_files(struct pci_dev *pdev) | |
396 | { | |
397 | int i; | |
398 | ||
399 | /* Expose the PCI resources from this device as files */ | |
400 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
401 | struct bin_attribute *res_attr; | |
402 | ||
403 | /* skip empty resources */ | |
404 | if (!pci_resource_len(pdev, i)) | |
405 | continue; | |
406 | ||
d48593bf | 407 | /* allocate attribute structure, piggyback attribute name */ |
656da9da | 408 | res_attr = kzalloc(sizeof(*res_attr) + 10, GFP_ATOMIC); |
1da177e4 | 409 | if (res_attr) { |
d48593bf DT |
410 | char *res_attr_name = (char *)(res_attr + 1); |
411 | ||
1da177e4 | 412 | pdev->res_attr[i] = res_attr; |
d48593bf DT |
413 | sprintf(res_attr_name, "resource%d", i); |
414 | res_attr->attr.name = res_attr_name; | |
1da177e4 LT |
415 | res_attr->attr.mode = S_IRUSR | S_IWUSR; |
416 | res_attr->attr.owner = THIS_MODULE; | |
d48593bf | 417 | res_attr->size = pci_resource_len(pdev, i); |
1da177e4 LT |
418 | res_attr->mmap = pci_mmap_resource; |
419 | res_attr->private = &pdev->resource[i]; | |
420 | sysfs_create_bin_file(&pdev->dev.kobj, res_attr); | |
421 | } | |
422 | } | |
423 | } | |
424 | ||
425 | /** | |
426 | * pci_remove_resource_files - cleanup resource files | |
427 | * @dev: dev to cleanup | |
428 | * | |
429 | * If we created resource files for @dev, remove them from sysfs and | |
430 | * free their resources. | |
431 | */ | |
432 | static void | |
433 | pci_remove_resource_files(struct pci_dev *pdev) | |
434 | { | |
435 | int i; | |
436 | ||
437 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
438 | struct bin_attribute *res_attr; | |
439 | ||
440 | res_attr = pdev->res_attr[i]; | |
441 | if (res_attr) { | |
442 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
443 | kfree(res_attr); | |
444 | } | |
445 | } | |
446 | } | |
447 | #else /* !HAVE_PCI_MMAP */ | |
448 | static inline void pci_create_resource_files(struct pci_dev *dev) { return; } | |
449 | static inline void pci_remove_resource_files(struct pci_dev *dev) { return; } | |
450 | #endif /* HAVE_PCI_MMAP */ | |
451 | ||
452 | /** | |
453 | * pci_write_rom - used to enable access to the PCI ROM display | |
454 | * @kobj: kernel object handle | |
455 | * @buf: user input | |
456 | * @off: file offset | |
457 | * @count: number of byte in input | |
458 | * | |
459 | * writing anything except 0 enables it | |
460 | */ | |
461 | static ssize_t | |
462 | pci_write_rom(struct kobject *kobj, char *buf, loff_t off, size_t count) | |
463 | { | |
464 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj)); | |
465 | ||
466 | if ((off == 0) && (*buf == '0') && (count == 2)) | |
467 | pdev->rom_attr_enabled = 0; | |
468 | else | |
469 | pdev->rom_attr_enabled = 1; | |
470 | ||
471 | return count; | |
472 | } | |
473 | ||
474 | /** | |
475 | * pci_read_rom - read a PCI ROM | |
476 | * @kobj: kernel object handle | |
477 | * @buf: where to put the data we read from the ROM | |
478 | * @off: file offset | |
479 | * @count: number of bytes to read | |
480 | * | |
481 | * Put @count bytes starting at @off into @buf from the ROM in the PCI | |
482 | * device corresponding to @kobj. | |
483 | */ | |
484 | static ssize_t | |
485 | pci_read_rom(struct kobject *kobj, char *buf, loff_t off, size_t count) | |
486 | { | |
487 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj)); | |
488 | void __iomem *rom; | |
489 | size_t size; | |
490 | ||
491 | if (!pdev->rom_attr_enabled) | |
492 | return -EINVAL; | |
493 | ||
494 | rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */ | |
495 | if (!rom) | |
496 | return 0; | |
497 | ||
498 | if (off >= size) | |
499 | count = 0; | |
500 | else { | |
501 | if (off + count > size) | |
502 | count = size - off; | |
503 | ||
504 | memcpy_fromio(buf, rom + off, count); | |
505 | } | |
506 | pci_unmap_rom(pdev, rom); | |
507 | ||
508 | return count; | |
509 | } | |
510 | ||
511 | static struct bin_attribute pci_config_attr = { | |
512 | .attr = { | |
513 | .name = "config", | |
514 | .mode = S_IRUGO | S_IWUSR, | |
515 | .owner = THIS_MODULE, | |
516 | }, | |
517 | .size = 256, | |
518 | .read = pci_read_config, | |
519 | .write = pci_write_config, | |
520 | }; | |
521 | ||
522 | static struct bin_attribute pcie_config_attr = { | |
523 | .attr = { | |
524 | .name = "config", | |
525 | .mode = S_IRUGO | S_IWUSR, | |
526 | .owner = THIS_MODULE, | |
527 | }, | |
528 | .size = 4096, | |
529 | .read = pci_read_config, | |
530 | .write = pci_write_config, | |
531 | }; | |
532 | ||
533 | int pci_create_sysfs_dev_files (struct pci_dev *pdev) | |
534 | { | |
535 | if (!sysfs_initialized) | |
536 | return -EACCES; | |
537 | ||
538 | if (pdev->cfg_size < 4096) | |
539 | sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr); | |
540 | else | |
541 | sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr); | |
542 | ||
543 | pci_create_resource_files(pdev); | |
544 | ||
545 | /* If the device has a ROM, try to expose it in sysfs. */ | |
546 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) { | |
547 | struct bin_attribute *rom_attr; | |
548 | ||
f5afe806 | 549 | rom_attr = kzalloc(sizeof(*rom_attr), GFP_ATOMIC); |
1da177e4 | 550 | if (rom_attr) { |
1da177e4 LT |
551 | pdev->rom_attr = rom_attr; |
552 | rom_attr->size = pci_resource_len(pdev, PCI_ROM_RESOURCE); | |
553 | rom_attr->attr.name = "rom"; | |
554 | rom_attr->attr.mode = S_IRUSR; | |
555 | rom_attr->attr.owner = THIS_MODULE; | |
556 | rom_attr->read = pci_read_rom; | |
557 | rom_attr->write = pci_write_rom; | |
558 | sysfs_create_bin_file(&pdev->dev.kobj, rom_attr); | |
559 | } | |
560 | } | |
561 | /* add platform-specific attributes */ | |
562 | pcibios_add_platform_entries(pdev); | |
563 | ||
564 | return 0; | |
565 | } | |
566 | ||
567 | /** | |
568 | * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files | |
569 | * @pdev: device whose entries we should free | |
570 | * | |
571 | * Cleanup when @pdev is removed from sysfs. | |
572 | */ | |
573 | void pci_remove_sysfs_dev_files(struct pci_dev *pdev) | |
574 | { | |
575 | if (pdev->cfg_size < 4096) | |
576 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); | |
577 | else | |
578 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); | |
579 | ||
580 | pci_remove_resource_files(pdev); | |
581 | ||
582 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) { | |
583 | if (pdev->rom_attr) { | |
584 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); | |
585 | kfree(pdev->rom_attr); | |
586 | } | |
587 | } | |
588 | } | |
589 | ||
590 | static int __init pci_sysfs_init(void) | |
591 | { | |
592 | struct pci_dev *pdev = NULL; | |
593 | ||
594 | sysfs_initialized = 1; | |
595 | for_each_pci_dev(pdev) | |
596 | pci_create_sysfs_dev_files(pdev); | |
597 | ||
598 | return 0; | |
599 | } | |
600 | ||
601 | __initcall(pci_sysfs_init); |