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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 | ||
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 | ||
e0cd5160 AH |
77 | #ifdef CONFIG_NUMA |
78 | mask = cpumask_of_node(dev_to_node(dev)); | |
79 | #else | |
3be83050 | 80 | mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); |
e0cd5160 | 81 | #endif |
3be83050 | 82 | len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask); |
39106dcf MT |
83 | buf[len++] = '\n'; |
84 | buf[len] = '\0'; | |
85 | return len; | |
86 | } | |
87 | ||
88 | ||
89 | static ssize_t local_cpulist_show(struct device *dev, | |
90 | struct device_attribute *attr, char *buf) | |
91 | { | |
3be83050 | 92 | const struct cpumask *mask; |
39106dcf MT |
93 | int len; |
94 | ||
e0cd5160 AH |
95 | #ifdef CONFIG_NUMA |
96 | mask = cpumask_of_node(dev_to_node(dev)); | |
97 | #else | |
3be83050 | 98 | mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); |
e0cd5160 | 99 | #endif |
3be83050 | 100 | len = cpulist_scnprintf(buf, PAGE_SIZE-2, mask); |
39106dcf MT |
101 | buf[len++] = '\n'; |
102 | buf[len] = '\0'; | |
103 | return len; | |
1da177e4 LT |
104 | } |
105 | ||
106 | /* show resources */ | |
107 | static ssize_t | |
e404e274 | 108 | resource_show(struct device * dev, struct device_attribute *attr, char * buf) |
1da177e4 LT |
109 | { |
110 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
111 | char * str = buf; | |
112 | int i; | |
fde09c6d | 113 | int max; |
e31dd6e4 | 114 | resource_size_t start, end; |
1da177e4 LT |
115 | |
116 | if (pci_dev->subordinate) | |
117 | max = DEVICE_COUNT_RESOURCE; | |
fde09c6d YZ |
118 | else |
119 | max = PCI_BRIDGE_RESOURCES; | |
1da177e4 LT |
120 | |
121 | for (i = 0; i < max; i++) { | |
2311b1f2 ME |
122 | struct resource *res = &pci_dev->resource[i]; |
123 | pci_resource_to_user(pci_dev, i, res, &start, &end); | |
124 | str += sprintf(str,"0x%016llx 0x%016llx 0x%016llx\n", | |
125 | (unsigned long long)start, | |
126 | (unsigned long long)end, | |
127 | (unsigned long long)res->flags); | |
1da177e4 LT |
128 | } |
129 | return (str - buf); | |
130 | } | |
131 | ||
87c8a443 | 132 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) |
9888549e GKH |
133 | { |
134 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
135 | ||
136 | return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n", | |
137 | pci_dev->vendor, pci_dev->device, | |
138 | pci_dev->subsystem_vendor, pci_dev->subsystem_device, | |
139 | (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8), | |
140 | (u8)(pci_dev->class)); | |
141 | } | |
bae94d02 IPG |
142 | |
143 | static ssize_t is_enabled_store(struct device *dev, | |
144 | struct device_attribute *attr, const char *buf, | |
145 | size_t count) | |
9f125d30 AV |
146 | { |
147 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 TP |
148 | unsigned long val; |
149 | ssize_t result = strict_strtoul(buf, 0, &val); | |
150 | ||
151 | if (result < 0) | |
152 | return result; | |
9f125d30 AV |
153 | |
154 | /* this can crash the machine when done on the "wrong" device */ | |
155 | if (!capable(CAP_SYS_ADMIN)) | |
92425a40 | 156 | return -EPERM; |
9f125d30 | 157 | |
92425a40 | 158 | if (!val) { |
296ccb08 | 159 | if (pci_is_enabled(pdev)) |
bae94d02 IPG |
160 | pci_disable_device(pdev); |
161 | else | |
162 | result = -EIO; | |
92425a40 | 163 | } else |
bae94d02 | 164 | result = pci_enable_device(pdev); |
9f125d30 | 165 | |
bae94d02 IPG |
166 | return result < 0 ? result : count; |
167 | } | |
168 | ||
169 | static ssize_t is_enabled_show(struct device *dev, | |
170 | struct device_attribute *attr, char *buf) | |
171 | { | |
172 | struct pci_dev *pdev; | |
9f125d30 | 173 | |
bae94d02 IPG |
174 | pdev = to_pci_dev (dev); |
175 | return sprintf (buf, "%u\n", atomic_read(&pdev->enable_cnt)); | |
9f125d30 AV |
176 | } |
177 | ||
81bb0e19 BG |
178 | #ifdef CONFIG_NUMA |
179 | static ssize_t | |
180 | numa_node_show(struct device *dev, struct device_attribute *attr, char *buf) | |
181 | { | |
182 | return sprintf (buf, "%d\n", dev->numa_node); | |
183 | } | |
184 | #endif | |
185 | ||
bb965401 YL |
186 | static ssize_t |
187 | dma_mask_bits_show(struct device *dev, struct device_attribute *attr, char *buf) | |
188 | { | |
189 | struct pci_dev *pdev = to_pci_dev(dev); | |
190 | ||
191 | return sprintf (buf, "%d\n", fls64(pdev->dma_mask)); | |
192 | } | |
193 | ||
194 | static ssize_t | |
195 | consistent_dma_mask_bits_show(struct device *dev, struct device_attribute *attr, | |
196 | char *buf) | |
197 | { | |
198 | return sprintf (buf, "%d\n", fls64(dev->coherent_dma_mask)); | |
199 | } | |
200 | ||
fe97064c BG |
201 | static ssize_t |
202 | msi_bus_show(struct device *dev, struct device_attribute *attr, char *buf) | |
203 | { | |
204 | struct pci_dev *pdev = to_pci_dev(dev); | |
205 | ||
206 | if (!pdev->subordinate) | |
207 | return 0; | |
208 | ||
209 | return sprintf (buf, "%u\n", | |
210 | !(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI)); | |
211 | } | |
212 | ||
213 | static ssize_t | |
214 | msi_bus_store(struct device *dev, struct device_attribute *attr, | |
215 | const char *buf, size_t count) | |
216 | { | |
217 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 TP |
218 | unsigned long val; |
219 | ||
220 | if (strict_strtoul(buf, 0, &val) < 0) | |
221 | return -EINVAL; | |
fe97064c BG |
222 | |
223 | /* bad things may happen if the no_msi flag is changed | |
224 | * while some drivers are loaded */ | |
225 | if (!capable(CAP_SYS_ADMIN)) | |
92425a40 | 226 | return -EPERM; |
fe97064c | 227 | |
92425a40 TP |
228 | /* Maybe pci devices without subordinate busses shouldn't even have this |
229 | * attribute in the first place? */ | |
fe97064c BG |
230 | if (!pdev->subordinate) |
231 | return count; | |
232 | ||
92425a40 TP |
233 | /* Is the flag going to change, or keep the value it already had? */ |
234 | if (!(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) ^ | |
235 | !!val) { | |
236 | pdev->subordinate->bus_flags ^= PCI_BUS_FLAGS_NO_MSI; | |
fe97064c | 237 | |
92425a40 TP |
238 | dev_warn(&pdev->dev, "forced subordinate bus to%s support MSI," |
239 | " bad things could happen\n", val ? "" : " not"); | |
fe97064c BG |
240 | } |
241 | ||
242 | return count; | |
243 | } | |
9888549e | 244 | |
705b1aaa AC |
245 | #ifdef CONFIG_HOTPLUG |
246 | static DEFINE_MUTEX(pci_remove_rescan_mutex); | |
247 | static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf, | |
248 | size_t count) | |
249 | { | |
250 | unsigned long val; | |
251 | struct pci_bus *b = NULL; | |
252 | ||
253 | if (strict_strtoul(buf, 0, &val) < 0) | |
254 | return -EINVAL; | |
255 | ||
256 | if (val) { | |
257 | mutex_lock(&pci_remove_rescan_mutex); | |
258 | while ((b = pci_find_next_bus(b)) != NULL) | |
259 | pci_rescan_bus(b); | |
260 | mutex_unlock(&pci_remove_rescan_mutex); | |
261 | } | |
262 | return count; | |
263 | } | |
264 | ||
265 | struct bus_attribute pci_bus_attrs[] = { | |
266 | __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store), | |
267 | __ATTR_NULL | |
268 | }; | |
77c27c7b | 269 | |
738a6396 AC |
270 | static ssize_t |
271 | dev_rescan_store(struct device *dev, struct device_attribute *attr, | |
272 | const char *buf, size_t count) | |
273 | { | |
274 | unsigned long val; | |
275 | struct pci_dev *pdev = to_pci_dev(dev); | |
276 | ||
277 | if (strict_strtoul(buf, 0, &val) < 0) | |
278 | return -EINVAL; | |
279 | ||
280 | if (val) { | |
281 | mutex_lock(&pci_remove_rescan_mutex); | |
282 | pci_rescan_bus(pdev->bus); | |
283 | mutex_unlock(&pci_remove_rescan_mutex); | |
284 | } | |
285 | return count; | |
286 | } | |
287 | ||
77c27c7b AC |
288 | static void remove_callback(struct device *dev) |
289 | { | |
290 | struct pci_dev *pdev = to_pci_dev(dev); | |
291 | ||
292 | mutex_lock(&pci_remove_rescan_mutex); | |
293 | pci_remove_bus_device(pdev); | |
294 | mutex_unlock(&pci_remove_rescan_mutex); | |
295 | } | |
296 | ||
297 | static ssize_t | |
298 | remove_store(struct device *dev, struct device_attribute *dummy, | |
299 | const char *buf, size_t count) | |
300 | { | |
301 | int ret = 0; | |
302 | unsigned long val; | |
77c27c7b AC |
303 | |
304 | if (strict_strtoul(buf, 0, &val) < 0) | |
305 | return -EINVAL; | |
306 | ||
77c27c7b AC |
307 | /* An attribute cannot be unregistered by one of its own methods, |
308 | * so we have to use this roundabout approach. | |
309 | */ | |
310 | if (val) | |
311 | ret = device_schedule_callback(dev, remove_callback); | |
312 | if (ret) | |
313 | count = ret; | |
314 | return count; | |
315 | } | |
705b1aaa AC |
316 | #endif |
317 | ||
1da177e4 LT |
318 | struct device_attribute pci_dev_attrs[] = { |
319 | __ATTR_RO(resource), | |
320 | __ATTR_RO(vendor), | |
321 | __ATTR_RO(device), | |
322 | __ATTR_RO(subsystem_vendor), | |
323 | __ATTR_RO(subsystem_device), | |
324 | __ATTR_RO(class), | |
325 | __ATTR_RO(irq), | |
326 | __ATTR_RO(local_cpus), | |
39106dcf | 327 | __ATTR_RO(local_cpulist), |
9888549e | 328 | __ATTR_RO(modalias), |
81bb0e19 BG |
329 | #ifdef CONFIG_NUMA |
330 | __ATTR_RO(numa_node), | |
331 | #endif | |
bb965401 YL |
332 | __ATTR_RO(dma_mask_bits), |
333 | __ATTR_RO(consistent_dma_mask_bits), | |
9f125d30 | 334 | __ATTR(enable, 0600, is_enabled_show, is_enabled_store), |
bdee9d98 DT |
335 | __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR), |
336 | broken_parity_status_show,broken_parity_status_store), | |
fe97064c | 337 | __ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store), |
77c27c7b AC |
338 | #ifdef CONFIG_HOTPLUG |
339 | __ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store), | |
738a6396 | 340 | __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store), |
77c27c7b | 341 | #endif |
1da177e4 LT |
342 | __ATTR_NULL, |
343 | }; | |
344 | ||
217f45de DA |
345 | static ssize_t |
346 | boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf) | |
347 | { | |
348 | struct pci_dev *pdev = to_pci_dev(dev); | |
349 | ||
350 | return sprintf(buf, "%u\n", | |
351 | !!(pdev->resource[PCI_ROM_RESOURCE].flags & | |
352 | IORESOURCE_ROM_SHADOW)); | |
353 | } | |
354 | struct device_attribute vga_attr = __ATTR_RO(boot_vga); | |
355 | ||
1da177e4 | 356 | static ssize_t |
91a69029 ZR |
357 | pci_read_config(struct kobject *kobj, struct bin_attribute *bin_attr, |
358 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
359 | { |
360 | struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); | |
361 | unsigned int size = 64; | |
362 | loff_t init_off = off; | |
4c0619ad | 363 | u8 *data = (u8*) buf; |
1da177e4 LT |
364 | |
365 | /* Several chips lock up trying to read undefined config space */ | |
366 | if (capable(CAP_SYS_ADMIN)) { | |
367 | size = dev->cfg_size; | |
368 | } else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { | |
369 | size = 128; | |
370 | } | |
371 | ||
372 | if (off > size) | |
373 | return 0; | |
374 | if (off + count > size) { | |
375 | size -= off; | |
376 | count = size; | |
377 | } else { | |
378 | size = count; | |
379 | } | |
380 | ||
4c0619ad SS |
381 | if ((off & 1) && size) { |
382 | u8 val; | |
e04b0ea2 | 383 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 384 | data[off - init_off] = val; |
1da177e4 | 385 | off++; |
4c0619ad SS |
386 | size--; |
387 | } | |
388 | ||
389 | if ((off & 3) && size > 2) { | |
390 | u16 val; | |
e04b0ea2 | 391 | pci_user_read_config_word(dev, off, &val); |
4c0619ad SS |
392 | data[off - init_off] = val & 0xff; |
393 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
394 | off += 2; | |
395 | size -= 2; | |
1da177e4 LT |
396 | } |
397 | ||
398 | while (size > 3) { | |
4c0619ad | 399 | u32 val; |
e04b0ea2 | 400 | pci_user_read_config_dword(dev, off, &val); |
4c0619ad SS |
401 | data[off - init_off] = val & 0xff; |
402 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
403 | data[off - init_off + 2] = (val >> 16) & 0xff; | |
404 | data[off - init_off + 3] = (val >> 24) & 0xff; | |
1da177e4 LT |
405 | off += 4; |
406 | size -= 4; | |
407 | } | |
408 | ||
4c0619ad SS |
409 | if (size >= 2) { |
410 | u16 val; | |
e04b0ea2 | 411 | pci_user_read_config_word(dev, off, &val); |
4c0619ad SS |
412 | data[off - init_off] = val & 0xff; |
413 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
414 | off += 2; | |
415 | size -= 2; | |
416 | } | |
417 | ||
418 | if (size > 0) { | |
419 | u8 val; | |
e04b0ea2 | 420 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 421 | data[off - init_off] = val; |
1da177e4 LT |
422 | off++; |
423 | --size; | |
424 | } | |
425 | ||
426 | return count; | |
427 | } | |
428 | ||
429 | static ssize_t | |
91a69029 ZR |
430 | pci_write_config(struct kobject *kobj, struct bin_attribute *bin_attr, |
431 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
432 | { |
433 | struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); | |
434 | unsigned int size = count; | |
435 | loff_t init_off = off; | |
4c0619ad | 436 | u8 *data = (u8*) buf; |
1da177e4 LT |
437 | |
438 | if (off > dev->cfg_size) | |
439 | return 0; | |
440 | if (off + count > dev->cfg_size) { | |
441 | size = dev->cfg_size - off; | |
442 | count = size; | |
443 | } | |
4c0619ad SS |
444 | |
445 | if ((off & 1) && size) { | |
e04b0ea2 | 446 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 | 447 | off++; |
4c0619ad | 448 | size--; |
1da177e4 | 449 | } |
4c0619ad SS |
450 | |
451 | if ((off & 3) && size > 2) { | |
452 | u16 val = data[off - init_off]; | |
453 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 454 | pci_user_write_config_word(dev, off, val); |
4c0619ad SS |
455 | off += 2; |
456 | size -= 2; | |
457 | } | |
1da177e4 LT |
458 | |
459 | while (size > 3) { | |
4c0619ad SS |
460 | u32 val = data[off - init_off]; |
461 | val |= (u32) data[off - init_off + 1] << 8; | |
462 | val |= (u32) data[off - init_off + 2] << 16; | |
463 | val |= (u32) data[off - init_off + 3] << 24; | |
e04b0ea2 | 464 | pci_user_write_config_dword(dev, off, val); |
1da177e4 LT |
465 | off += 4; |
466 | size -= 4; | |
467 | } | |
4c0619ad SS |
468 | |
469 | if (size >= 2) { | |
470 | u16 val = data[off - init_off]; | |
471 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 472 | pci_user_write_config_word(dev, off, val); |
4c0619ad SS |
473 | off += 2; |
474 | size -= 2; | |
475 | } | |
1da177e4 | 476 | |
4c0619ad | 477 | if (size) { |
e04b0ea2 | 478 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 LT |
479 | off++; |
480 | --size; | |
481 | } | |
482 | ||
483 | return count; | |
484 | } | |
485 | ||
94e61088 | 486 | static ssize_t |
287d19ce SH |
487 | read_vpd_attr(struct kobject *kobj, struct bin_attribute *bin_attr, |
488 | char *buf, loff_t off, size_t count) | |
94e61088 BH |
489 | { |
490 | struct pci_dev *dev = | |
491 | to_pci_dev(container_of(kobj, struct device, kobj)); | |
94e61088 BH |
492 | |
493 | if (off > bin_attr->size) | |
494 | count = 0; | |
495 | else if (count > bin_attr->size - off) | |
496 | count = bin_attr->size - off; | |
94e61088 | 497 | |
287d19ce | 498 | return pci_read_vpd(dev, off, count, buf); |
94e61088 BH |
499 | } |
500 | ||
501 | static ssize_t | |
287d19ce SH |
502 | write_vpd_attr(struct kobject *kobj, struct bin_attribute *bin_attr, |
503 | char *buf, loff_t off, size_t count) | |
94e61088 BH |
504 | { |
505 | struct pci_dev *dev = | |
506 | to_pci_dev(container_of(kobj, struct device, kobj)); | |
94e61088 BH |
507 | |
508 | if (off > bin_attr->size) | |
509 | count = 0; | |
510 | else if (count > bin_attr->size - off) | |
511 | count = bin_attr->size - off; | |
94e61088 | 512 | |
287d19ce | 513 | return pci_write_vpd(dev, off, count, buf); |
94e61088 BH |
514 | } |
515 | ||
1da177e4 LT |
516 | #ifdef HAVE_PCI_LEGACY |
517 | /** | |
518 | * pci_read_legacy_io - read byte(s) from legacy I/O port space | |
519 | * @kobj: kobject corresponding to file to read from | |
cffb2faf | 520 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
521 | * @buf: buffer to store results |
522 | * @off: offset into legacy I/O port space | |
523 | * @count: number of bytes to read | |
524 | * | |
525 | * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
526 | * callback routine (pci_legacy_read). | |
527 | */ | |
f19aeb1f | 528 | static ssize_t |
91a69029 ZR |
529 | pci_read_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr, |
530 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
531 | { |
532 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 533 | struct device, |
1da177e4 LT |
534 | kobj)); |
535 | ||
536 | /* Only support 1, 2 or 4 byte accesses */ | |
537 | if (count != 1 && count != 2 && count != 4) | |
538 | return -EINVAL; | |
539 | ||
540 | return pci_legacy_read(bus, off, (u32 *)buf, count); | |
541 | } | |
542 | ||
543 | /** | |
544 | * pci_write_legacy_io - write byte(s) to legacy I/O port space | |
545 | * @kobj: kobject corresponding to file to read from | |
cffb2faf | 546 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
547 | * @buf: buffer containing value to be written |
548 | * @off: offset into legacy I/O port space | |
549 | * @count: number of bytes to write | |
550 | * | |
551 | * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
552 | * callback routine (pci_legacy_write). | |
553 | */ | |
f19aeb1f | 554 | static ssize_t |
91a69029 ZR |
555 | pci_write_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr, |
556 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
557 | { |
558 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 559 | struct device, |
1da177e4 LT |
560 | kobj)); |
561 | /* Only support 1, 2 or 4 byte accesses */ | |
562 | if (count != 1 && count != 2 && count != 4) | |
563 | return -EINVAL; | |
564 | ||
565 | return pci_legacy_write(bus, off, *(u32 *)buf, count); | |
566 | } | |
567 | ||
568 | /** | |
569 | * pci_mmap_legacy_mem - map legacy PCI memory into user memory space | |
570 | * @kobj: kobject corresponding to device to be mapped | |
571 | * @attr: struct bin_attribute for this file | |
572 | * @vma: struct vm_area_struct passed to mmap | |
573 | * | |
f19aeb1f | 574 | * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap |
1da177e4 LT |
575 | * legacy memory space (first meg of bus space) into application virtual |
576 | * memory space. | |
577 | */ | |
f19aeb1f | 578 | static int |
1da177e4 LT |
579 | pci_mmap_legacy_mem(struct kobject *kobj, struct bin_attribute *attr, |
580 | struct vm_area_struct *vma) | |
581 | { | |
582 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 583 | struct device, |
1da177e4 LT |
584 | kobj)); |
585 | ||
f19aeb1f BH |
586 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem); |
587 | } | |
588 | ||
589 | /** | |
590 | * pci_mmap_legacy_io - map legacy PCI IO into user memory space | |
591 | * @kobj: kobject corresponding to device to be mapped | |
592 | * @attr: struct bin_attribute for this file | |
593 | * @vma: struct vm_area_struct passed to mmap | |
594 | * | |
595 | * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap | |
596 | * legacy IO space (first meg of bus space) into application virtual | |
597 | * memory space. Returns -ENOSYS if the operation isn't supported | |
598 | */ | |
599 | static int | |
600 | pci_mmap_legacy_io(struct kobject *kobj, struct bin_attribute *attr, | |
601 | struct vm_area_struct *vma) | |
602 | { | |
603 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
604 | struct device, | |
605 | kobj)); | |
606 | ||
607 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io); | |
608 | } | |
609 | ||
10a0ef39 IK |
610 | /** |
611 | * pci_adjust_legacy_attr - adjustment of legacy file attributes | |
612 | * @b: bus to create files under | |
613 | * @mmap_type: I/O port or memory | |
614 | * | |
615 | * Stub implementation. Can be overridden by arch if necessary. | |
616 | */ | |
617 | void __weak | |
618 | pci_adjust_legacy_attr(struct pci_bus *b, enum pci_mmap_state mmap_type) | |
619 | { | |
620 | return; | |
621 | } | |
622 | ||
f19aeb1f BH |
623 | /** |
624 | * pci_create_legacy_files - create legacy I/O port and memory files | |
625 | * @b: bus to create files under | |
626 | * | |
627 | * Some platforms allow access to legacy I/O port and ISA memory space on | |
628 | * a per-bus basis. This routine creates the files and ties them into | |
629 | * their associated read, write and mmap files from pci-sysfs.c | |
630 | * | |
631 | * On error unwind, but don't propogate the error to the caller | |
632 | * as it is ok to set up the PCI bus without these files. | |
633 | */ | |
634 | void pci_create_legacy_files(struct pci_bus *b) | |
635 | { | |
636 | int error; | |
637 | ||
638 | b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2, | |
639 | GFP_ATOMIC); | |
640 | if (!b->legacy_io) | |
641 | goto kzalloc_err; | |
642 | ||
643 | b->legacy_io->attr.name = "legacy_io"; | |
644 | b->legacy_io->size = 0xffff; | |
645 | b->legacy_io->attr.mode = S_IRUSR | S_IWUSR; | |
646 | b->legacy_io->read = pci_read_legacy_io; | |
647 | b->legacy_io->write = pci_write_legacy_io; | |
648 | b->legacy_io->mmap = pci_mmap_legacy_io; | |
10a0ef39 | 649 | pci_adjust_legacy_attr(b, pci_mmap_io); |
f19aeb1f BH |
650 | error = device_create_bin_file(&b->dev, b->legacy_io); |
651 | if (error) | |
652 | goto legacy_io_err; | |
653 | ||
654 | /* Allocated above after the legacy_io struct */ | |
655 | b->legacy_mem = b->legacy_io + 1; | |
656 | b->legacy_mem->attr.name = "legacy_mem"; | |
657 | b->legacy_mem->size = 1024*1024; | |
658 | b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR; | |
659 | b->legacy_mem->mmap = pci_mmap_legacy_mem; | |
10a0ef39 | 660 | pci_adjust_legacy_attr(b, pci_mmap_mem); |
f19aeb1f BH |
661 | error = device_create_bin_file(&b->dev, b->legacy_mem); |
662 | if (error) | |
663 | goto legacy_mem_err; | |
664 | ||
665 | return; | |
666 | ||
667 | legacy_mem_err: | |
668 | device_remove_bin_file(&b->dev, b->legacy_io); | |
669 | legacy_io_err: | |
670 | kfree(b->legacy_io); | |
671 | b->legacy_io = NULL; | |
672 | kzalloc_err: | |
673 | printk(KERN_WARNING "pci: warning: could not create legacy I/O port " | |
674 | "and ISA memory resources to sysfs\n"); | |
675 | return; | |
676 | } | |
677 | ||
678 | void pci_remove_legacy_files(struct pci_bus *b) | |
679 | { | |
680 | if (b->legacy_io) { | |
681 | device_remove_bin_file(&b->dev, b->legacy_io); | |
682 | device_remove_bin_file(&b->dev, b->legacy_mem); | |
683 | kfree(b->legacy_io); /* both are allocated here */ | |
684 | } | |
1da177e4 LT |
685 | } |
686 | #endif /* HAVE_PCI_LEGACY */ | |
687 | ||
688 | #ifdef HAVE_PCI_MMAP | |
b5ff7df3 | 689 | |
9eff02e2 | 690 | int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma) |
b5ff7df3 LT |
691 | { |
692 | unsigned long nr, start, size; | |
693 | ||
694 | nr = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; | |
695 | start = vma->vm_pgoff; | |
88e7df0b | 696 | size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1; |
b5ff7df3 LT |
697 | if (start < size && size - start >= nr) |
698 | return 1; | |
699 | WARN(1, "process \"%s\" tried to map 0x%08lx-0x%08lx on %s BAR %d (size 0x%08lx)\n", | |
700 | current->comm, start, start+nr, pci_name(pdev), resno, size); | |
701 | return 0; | |
702 | } | |
703 | ||
1da177e4 LT |
704 | /** |
705 | * pci_mmap_resource - map a PCI resource into user memory space | |
706 | * @kobj: kobject for mapping | |
707 | * @attr: struct bin_attribute for the file being mapped | |
708 | * @vma: struct vm_area_struct passed into the mmap | |
45aec1ae | 709 | * @write_combine: 1 for write_combine mapping |
1da177e4 LT |
710 | * |
711 | * Use the regular PCI mapping routines to map a PCI resource into userspace. | |
1da177e4 LT |
712 | */ |
713 | static int | |
714 | pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr, | |
45aec1ae | 715 | struct vm_area_struct *vma, int write_combine) |
1da177e4 LT |
716 | { |
717 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, | |
718 | struct device, kobj)); | |
719 | struct resource *res = (struct resource *)attr->private; | |
720 | enum pci_mmap_state mmap_type; | |
e31dd6e4 | 721 | resource_size_t start, end; |
2311b1f2 | 722 | int i; |
1da177e4 | 723 | |
2311b1f2 ME |
724 | for (i = 0; i < PCI_ROM_RESOURCE; i++) |
725 | if (res == &pdev->resource[i]) | |
726 | break; | |
727 | if (i >= PCI_ROM_RESOURCE) | |
728 | return -ENODEV; | |
729 | ||
b5ff7df3 LT |
730 | if (!pci_mmap_fits(pdev, i, vma)) |
731 | return -EINVAL; | |
732 | ||
2311b1f2 ME |
733 | /* pci_mmap_page_range() expects the same kind of entry as coming |
734 | * from /proc/bus/pci/ which is a "user visible" value. If this is | |
735 | * different from the resource itself, arch will do necessary fixup. | |
736 | */ | |
737 | pci_resource_to_user(pdev, i, res, &start, &end); | |
738 | vma->vm_pgoff += start >> PAGE_SHIFT; | |
1da177e4 LT |
739 | mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io; |
740 | ||
e8de1481 AV |
741 | if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(start)) |
742 | return -EINVAL; | |
743 | ||
45aec1ae | 744 | return pci_mmap_page_range(pdev, vma, mmap_type, write_combine); |
745 | } | |
746 | ||
747 | static int | |
748 | pci_mmap_resource_uc(struct kobject *kobj, struct bin_attribute *attr, | |
749 | struct vm_area_struct *vma) | |
750 | { | |
751 | return pci_mmap_resource(kobj, attr, vma, 0); | |
752 | } | |
753 | ||
754 | static int | |
755 | pci_mmap_resource_wc(struct kobject *kobj, struct bin_attribute *attr, | |
756 | struct vm_area_struct *vma) | |
757 | { | |
758 | return pci_mmap_resource(kobj, attr, vma, 1); | |
1da177e4 LT |
759 | } |
760 | ||
b19441af GKH |
761 | /** |
762 | * pci_remove_resource_files - cleanup resource files | |
cffb2faf | 763 | * @pdev: dev to cleanup |
b19441af | 764 | * |
cffb2faf | 765 | * If we created resource files for @pdev, remove them from sysfs and |
b19441af GKH |
766 | * free their resources. |
767 | */ | |
768 | static void | |
769 | pci_remove_resource_files(struct pci_dev *pdev) | |
770 | { | |
771 | int i; | |
772 | ||
773 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
774 | struct bin_attribute *res_attr; | |
775 | ||
776 | res_attr = pdev->res_attr[i]; | |
777 | if (res_attr) { | |
778 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
779 | kfree(res_attr); | |
780 | } | |
45aec1ae | 781 | |
782 | res_attr = pdev->res_attr_wc[i]; | |
783 | if (res_attr) { | |
784 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
785 | kfree(res_attr); | |
786 | } | |
b19441af GKH |
787 | } |
788 | } | |
789 | ||
45aec1ae | 790 | static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine) |
791 | { | |
792 | /* allocate attribute structure, piggyback attribute name */ | |
793 | int name_len = write_combine ? 13 : 10; | |
794 | struct bin_attribute *res_attr; | |
795 | int retval; | |
796 | ||
797 | res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC); | |
798 | if (res_attr) { | |
799 | char *res_attr_name = (char *)(res_attr + 1); | |
800 | ||
801 | if (write_combine) { | |
802 | pdev->res_attr_wc[num] = res_attr; | |
803 | sprintf(res_attr_name, "resource%d_wc", num); | |
804 | res_attr->mmap = pci_mmap_resource_wc; | |
805 | } else { | |
806 | pdev->res_attr[num] = res_attr; | |
807 | sprintf(res_attr_name, "resource%d", num); | |
808 | res_attr->mmap = pci_mmap_resource_uc; | |
809 | } | |
810 | res_attr->attr.name = res_attr_name; | |
811 | res_attr->attr.mode = S_IRUSR | S_IWUSR; | |
812 | res_attr->size = pci_resource_len(pdev, num); | |
813 | res_attr->private = &pdev->resource[num]; | |
814 | retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr); | |
815 | } else | |
816 | retval = -ENOMEM; | |
817 | ||
818 | return retval; | |
819 | } | |
820 | ||
1da177e4 LT |
821 | /** |
822 | * pci_create_resource_files - create resource files in sysfs for @dev | |
cffb2faf | 823 | * @pdev: dev in question |
1da177e4 | 824 | * |
cffb2faf | 825 | * Walk the resources in @pdev creating files for each resource available. |
1da177e4 | 826 | */ |
b19441af | 827 | static int pci_create_resource_files(struct pci_dev *pdev) |
1da177e4 LT |
828 | { |
829 | int i; | |
b19441af | 830 | int retval; |
1da177e4 LT |
831 | |
832 | /* Expose the PCI resources from this device as files */ | |
833 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
1da177e4 LT |
834 | |
835 | /* skip empty resources */ | |
836 | if (!pci_resource_len(pdev, i)) | |
837 | continue; | |
838 | ||
45aec1ae | 839 | retval = pci_create_attr(pdev, i, 0); |
840 | /* for prefetchable resources, create a WC mappable file */ | |
841 | if (!retval && pdev->resource[i].flags & IORESOURCE_PREFETCH) | |
842 | retval = pci_create_attr(pdev, i, 1); | |
843 | ||
844 | if (retval) { | |
845 | pci_remove_resource_files(pdev); | |
846 | return retval; | |
1da177e4 LT |
847 | } |
848 | } | |
b19441af | 849 | return 0; |
1da177e4 LT |
850 | } |
851 | #else /* !HAVE_PCI_MMAP */ | |
10a0ef39 IK |
852 | int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; } |
853 | void __weak pci_remove_resource_files(struct pci_dev *dev) { return; } | |
1da177e4 LT |
854 | #endif /* HAVE_PCI_MMAP */ |
855 | ||
856 | /** | |
857 | * pci_write_rom - used to enable access to the PCI ROM display | |
858 | * @kobj: kernel object handle | |
cffb2faf | 859 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
860 | * @buf: user input |
861 | * @off: file offset | |
862 | * @count: number of byte in input | |
863 | * | |
864 | * writing anything except 0 enables it | |
865 | */ | |
866 | static ssize_t | |
91a69029 ZR |
867 | pci_write_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 | ||
872 | if ((off == 0) && (*buf == '0') && (count == 2)) | |
873 | pdev->rom_attr_enabled = 0; | |
874 | else | |
875 | pdev->rom_attr_enabled = 1; | |
876 | ||
877 | return count; | |
878 | } | |
879 | ||
880 | /** | |
881 | * pci_read_rom - read a PCI ROM | |
882 | * @kobj: kernel object handle | |
cffb2faf | 883 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
884 | * @buf: where to put the data we read from the ROM |
885 | * @off: file offset | |
886 | * @count: number of bytes to read | |
887 | * | |
888 | * Put @count bytes starting at @off into @buf from the ROM in the PCI | |
889 | * device corresponding to @kobj. | |
890 | */ | |
891 | static ssize_t | |
91a69029 ZR |
892 | pci_read_rom(struct kobject *kobj, struct bin_attribute *bin_attr, |
893 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
894 | { |
895 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj)); | |
896 | void __iomem *rom; | |
897 | size_t size; | |
898 | ||
899 | if (!pdev->rom_attr_enabled) | |
900 | return -EINVAL; | |
901 | ||
902 | rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */ | |
97c44836 TN |
903 | if (!rom || !size) |
904 | return -EIO; | |
1da177e4 LT |
905 | |
906 | if (off >= size) | |
907 | count = 0; | |
908 | else { | |
909 | if (off + count > size) | |
910 | count = size - off; | |
911 | ||
912 | memcpy_fromio(buf, rom + off, count); | |
913 | } | |
914 | pci_unmap_rom(pdev, rom); | |
915 | ||
916 | return count; | |
917 | } | |
918 | ||
919 | static struct bin_attribute pci_config_attr = { | |
920 | .attr = { | |
921 | .name = "config", | |
922 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 923 | }, |
557848c3 | 924 | .size = PCI_CFG_SPACE_SIZE, |
1da177e4 LT |
925 | .read = pci_read_config, |
926 | .write = pci_write_config, | |
927 | }; | |
928 | ||
929 | static struct bin_attribute pcie_config_attr = { | |
930 | .attr = { | |
931 | .name = "config", | |
932 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 933 | }, |
557848c3 | 934 | .size = PCI_CFG_SPACE_EXP_SIZE, |
1da177e4 LT |
935 | .read = pci_read_config, |
936 | .write = pci_write_config, | |
937 | }; | |
938 | ||
a2cd52ca | 939 | int __attribute__ ((weak)) pcibios_add_platform_entries(struct pci_dev *dev) |
575e3348 | 940 | { |
a2cd52ca | 941 | return 0; |
575e3348 ME |
942 | } |
943 | ||
711d5779 MT |
944 | static ssize_t reset_store(struct device *dev, |
945 | struct device_attribute *attr, const char *buf, | |
946 | size_t count) | |
947 | { | |
948 | struct pci_dev *pdev = to_pci_dev(dev); | |
949 | unsigned long val; | |
950 | ssize_t result = strict_strtoul(buf, 0, &val); | |
951 | ||
952 | if (result < 0) | |
953 | return result; | |
954 | ||
955 | if (val != 1) | |
956 | return -EINVAL; | |
957 | return pci_reset_function(pdev); | |
958 | } | |
959 | ||
960 | static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store); | |
961 | ||
280c73d3 ZY |
962 | static int pci_create_capabilities_sysfs(struct pci_dev *dev) |
963 | { | |
964 | int retval; | |
965 | struct bin_attribute *attr; | |
966 | ||
967 | /* If the device has VPD, try to expose it in sysfs. */ | |
968 | if (dev->vpd) { | |
969 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); | |
970 | if (!attr) | |
971 | return -ENOMEM; | |
972 | ||
973 | attr->size = dev->vpd->len; | |
974 | attr->attr.name = "vpd"; | |
975 | attr->attr.mode = S_IRUSR | S_IWUSR; | |
287d19ce SH |
976 | attr->read = read_vpd_attr; |
977 | attr->write = write_vpd_attr; | |
280c73d3 ZY |
978 | retval = sysfs_create_bin_file(&dev->dev.kobj, attr); |
979 | if (retval) { | |
980 | kfree(dev->vpd->attr); | |
981 | return retval; | |
982 | } | |
983 | dev->vpd->attr = attr; | |
984 | } | |
985 | ||
986 | /* Active State Power Management */ | |
987 | pcie_aspm_create_sysfs_dev_files(dev); | |
988 | ||
711d5779 MT |
989 | if (!pci_probe_reset_function(dev)) { |
990 | retval = device_create_file(&dev->dev, &reset_attr); | |
991 | if (retval) | |
992 | goto error; | |
993 | dev->reset_fn = 1; | |
994 | } | |
280c73d3 | 995 | return 0; |
711d5779 MT |
996 | |
997 | error: | |
998 | pcie_aspm_remove_sysfs_dev_files(dev); | |
999 | if (dev->vpd && dev->vpd->attr) { | |
1000 | sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr); | |
1001 | kfree(dev->vpd->attr); | |
1002 | } | |
1003 | ||
1004 | return retval; | |
280c73d3 ZY |
1005 | } |
1006 | ||
b19441af | 1007 | int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev) |
1da177e4 | 1008 | { |
b19441af | 1009 | int retval; |
280c73d3 ZY |
1010 | int rom_size = 0; |
1011 | struct bin_attribute *attr; | |
b19441af | 1012 | |
1da177e4 LT |
1013 | if (!sysfs_initialized) |
1014 | return -EACCES; | |
1015 | ||
557848c3 | 1016 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
b19441af | 1017 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1da177e4 | 1018 | else |
b19441af GKH |
1019 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
1020 | if (retval) | |
1021 | goto err; | |
1da177e4 | 1022 | |
b19441af GKH |
1023 | retval = pci_create_resource_files(pdev); |
1024 | if (retval) | |
280c73d3 ZY |
1025 | goto err_config_file; |
1026 | ||
1027 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) | |
1028 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); | |
1029 | else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW) | |
1030 | rom_size = 0x20000; | |
1da177e4 LT |
1031 | |
1032 | /* If the device has a ROM, try to expose it in sysfs. */ | |
280c73d3 | 1033 | if (rom_size) { |
94e61088 | 1034 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); |
280c73d3 | 1035 | if (!attr) { |
b19441af | 1036 | retval = -ENOMEM; |
9890b12a | 1037 | goto err_resource_files; |
1da177e4 | 1038 | } |
280c73d3 ZY |
1039 | attr->size = rom_size; |
1040 | attr->attr.name = "rom"; | |
1041 | attr->attr.mode = S_IRUSR; | |
1042 | attr->read = pci_read_rom; | |
1043 | attr->write = pci_write_rom; | |
1044 | retval = sysfs_create_bin_file(&pdev->dev.kobj, attr); | |
1045 | if (retval) { | |
1046 | kfree(attr); | |
1047 | goto err_resource_files; | |
1048 | } | |
1049 | pdev->rom_attr = attr; | |
1da177e4 | 1050 | } |
280c73d3 | 1051 | |
217f45de DA |
1052 | if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) { |
1053 | retval = device_create_file(&pdev->dev, &vga_attr); | |
1054 | if (retval) | |
1055 | goto err_rom_file; | |
1056 | } | |
1057 | ||
1da177e4 | 1058 | /* add platform-specific attributes */ |
280c73d3 ZY |
1059 | retval = pcibios_add_platform_entries(pdev); |
1060 | if (retval) | |
217f45de | 1061 | goto err_vga_file; |
b19441af | 1062 | |
280c73d3 ZY |
1063 | /* add sysfs entries for various capabilities */ |
1064 | retval = pci_create_capabilities_sysfs(pdev); | |
1065 | if (retval) | |
217f45de | 1066 | goto err_vga_file; |
7d715a6c | 1067 | |
1da177e4 | 1068 | return 0; |
b19441af | 1069 | |
217f45de DA |
1070 | err_vga_file: |
1071 | if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) | |
1072 | device_remove_file(&pdev->dev, &vga_attr); | |
a2cd52ca | 1073 | err_rom_file: |
280c73d3 | 1074 | if (rom_size) { |
94e61088 | 1075 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); |
280c73d3 ZY |
1076 | kfree(pdev->rom_attr); |
1077 | pdev->rom_attr = NULL; | |
1078 | } | |
9890b12a ME |
1079 | err_resource_files: |
1080 | pci_remove_resource_files(pdev); | |
94e61088 | 1081 | err_config_file: |
557848c3 | 1082 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
b19441af GKH |
1083 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1084 | else | |
1085 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); | |
1086 | err: | |
1087 | return retval; | |
1da177e4 LT |
1088 | } |
1089 | ||
280c73d3 ZY |
1090 | static void pci_remove_capabilities_sysfs(struct pci_dev *dev) |
1091 | { | |
1092 | if (dev->vpd && dev->vpd->attr) { | |
1093 | sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr); | |
1094 | kfree(dev->vpd->attr); | |
1095 | } | |
1096 | ||
1097 | pcie_aspm_remove_sysfs_dev_files(dev); | |
711d5779 MT |
1098 | if (dev->reset_fn) { |
1099 | device_remove_file(&dev->dev, &reset_attr); | |
1100 | dev->reset_fn = 0; | |
1101 | } | |
280c73d3 ZY |
1102 | } |
1103 | ||
1da177e4 LT |
1104 | /** |
1105 | * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files | |
1106 | * @pdev: device whose entries we should free | |
1107 | * | |
1108 | * Cleanup when @pdev is removed from sysfs. | |
1109 | */ | |
1110 | void pci_remove_sysfs_dev_files(struct pci_dev *pdev) | |
1111 | { | |
280c73d3 ZY |
1112 | int rom_size = 0; |
1113 | ||
d67afe5e DM |
1114 | if (!sysfs_initialized) |
1115 | return; | |
1116 | ||
280c73d3 | 1117 | pci_remove_capabilities_sysfs(pdev); |
7d715a6c | 1118 | |
557848c3 | 1119 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
1da177e4 LT |
1120 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1121 | else | |
1122 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); | |
1123 | ||
1124 | pci_remove_resource_files(pdev); | |
1125 | ||
280c73d3 ZY |
1126 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) |
1127 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); | |
1128 | else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW) | |
1129 | rom_size = 0x20000; | |
1130 | ||
1131 | if (rom_size && pdev->rom_attr) { | |
1132 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); | |
1133 | kfree(pdev->rom_attr); | |
1da177e4 LT |
1134 | } |
1135 | } | |
1136 | ||
1137 | static int __init pci_sysfs_init(void) | |
1138 | { | |
1139 | struct pci_dev *pdev = NULL; | |
b19441af GKH |
1140 | int retval; |
1141 | ||
1da177e4 | 1142 | sysfs_initialized = 1; |
b19441af GKH |
1143 | for_each_pci_dev(pdev) { |
1144 | retval = pci_create_sysfs_dev_files(pdev); | |
151fc5df JL |
1145 | if (retval) { |
1146 | pci_dev_put(pdev); | |
b19441af | 1147 | return retval; |
151fc5df | 1148 | } |
b19441af | 1149 | } |
1da177e4 LT |
1150 | |
1151 | return 0; | |
1152 | } | |
1153 | ||
40ee9e9f | 1154 | late_initcall(pci_sysfs_init); |