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 | ||
e0cd5160 | 77 | #ifdef CONFIG_NUMA |
6be954d1 DJ |
78 | mask = (dev_to_node(dev) == -1) ? cpu_online_mask : |
79 | cpumask_of_node(dev_to_node(dev)); | |
e0cd5160 | 80 | #else |
3be83050 | 81 | mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); |
e0cd5160 | 82 | #endif |
3be83050 | 83 | len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask); |
39106dcf MT |
84 | buf[len++] = '\n'; |
85 | buf[len] = '\0'; | |
86 | return len; | |
87 | } | |
88 | ||
89 | ||
90 | static ssize_t local_cpulist_show(struct device *dev, | |
91 | struct device_attribute *attr, char *buf) | |
92 | { | |
3be83050 | 93 | const struct cpumask *mask; |
39106dcf MT |
94 | int len; |
95 | ||
e0cd5160 | 96 | #ifdef CONFIG_NUMA |
6be954d1 DJ |
97 | mask = (dev_to_node(dev) == -1) ? cpu_online_mask : |
98 | cpumask_of_node(dev_to_node(dev)); | |
e0cd5160 | 99 | #else |
3be83050 | 100 | mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); |
e0cd5160 | 101 | #endif |
3be83050 | 102 | len = cpulist_scnprintf(buf, PAGE_SIZE-2, mask); |
39106dcf MT |
103 | buf[len++] = '\n'; |
104 | buf[len] = '\0'; | |
105 | return len; | |
1da177e4 LT |
106 | } |
107 | ||
108 | /* show resources */ | |
109 | static ssize_t | |
e404e274 | 110 | resource_show(struct device * dev, struct device_attribute *attr, char * buf) |
1da177e4 LT |
111 | { |
112 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
113 | char * str = buf; | |
114 | int i; | |
fde09c6d | 115 | int max; |
e31dd6e4 | 116 | resource_size_t start, end; |
1da177e4 LT |
117 | |
118 | if (pci_dev->subordinate) | |
119 | max = DEVICE_COUNT_RESOURCE; | |
fde09c6d YZ |
120 | else |
121 | max = PCI_BRIDGE_RESOURCES; | |
1da177e4 LT |
122 | |
123 | for (i = 0; i < max; i++) { | |
2311b1f2 ME |
124 | struct resource *res = &pci_dev->resource[i]; |
125 | pci_resource_to_user(pci_dev, i, res, &start, &end); | |
126 | str += sprintf(str,"0x%016llx 0x%016llx 0x%016llx\n", | |
127 | (unsigned long long)start, | |
128 | (unsigned long long)end, | |
129 | (unsigned long long)res->flags); | |
1da177e4 LT |
130 | } |
131 | return (str - buf); | |
132 | } | |
133 | ||
87c8a443 | 134 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) |
9888549e GKH |
135 | { |
136 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
137 | ||
138 | return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n", | |
139 | pci_dev->vendor, pci_dev->device, | |
140 | pci_dev->subsystem_vendor, pci_dev->subsystem_device, | |
141 | (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8), | |
142 | (u8)(pci_dev->class)); | |
143 | } | |
bae94d02 IPG |
144 | |
145 | static ssize_t is_enabled_store(struct device *dev, | |
146 | struct device_attribute *attr, const char *buf, | |
147 | size_t count) | |
9f125d30 AV |
148 | { |
149 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 TP |
150 | unsigned long val; |
151 | ssize_t result = strict_strtoul(buf, 0, &val); | |
152 | ||
153 | if (result < 0) | |
154 | return result; | |
9f125d30 AV |
155 | |
156 | /* this can crash the machine when done on the "wrong" device */ | |
157 | if (!capable(CAP_SYS_ADMIN)) | |
92425a40 | 158 | return -EPERM; |
9f125d30 | 159 | |
92425a40 | 160 | if (!val) { |
296ccb08 | 161 | if (pci_is_enabled(pdev)) |
bae94d02 IPG |
162 | pci_disable_device(pdev); |
163 | else | |
164 | result = -EIO; | |
92425a40 | 165 | } else |
bae94d02 | 166 | result = pci_enable_device(pdev); |
9f125d30 | 167 | |
bae94d02 IPG |
168 | return result < 0 ? result : count; |
169 | } | |
170 | ||
171 | static ssize_t is_enabled_show(struct device *dev, | |
172 | struct device_attribute *attr, char *buf) | |
173 | { | |
174 | struct pci_dev *pdev; | |
9f125d30 | 175 | |
bae94d02 IPG |
176 | pdev = to_pci_dev (dev); |
177 | return sprintf (buf, "%u\n", atomic_read(&pdev->enable_cnt)); | |
9f125d30 AV |
178 | } |
179 | ||
81bb0e19 BG |
180 | #ifdef CONFIG_NUMA |
181 | static ssize_t | |
182 | numa_node_show(struct device *dev, struct device_attribute *attr, char *buf) | |
183 | { | |
184 | return sprintf (buf, "%d\n", dev->numa_node); | |
185 | } | |
186 | #endif | |
187 | ||
bb965401 YL |
188 | static ssize_t |
189 | dma_mask_bits_show(struct device *dev, struct device_attribute *attr, char *buf) | |
190 | { | |
191 | struct pci_dev *pdev = to_pci_dev(dev); | |
192 | ||
193 | return sprintf (buf, "%d\n", fls64(pdev->dma_mask)); | |
194 | } | |
195 | ||
196 | static ssize_t | |
197 | consistent_dma_mask_bits_show(struct device *dev, struct device_attribute *attr, | |
198 | char *buf) | |
199 | { | |
200 | return sprintf (buf, "%d\n", fls64(dev->coherent_dma_mask)); | |
201 | } | |
202 | ||
fe97064c BG |
203 | static ssize_t |
204 | msi_bus_show(struct device *dev, struct device_attribute *attr, char *buf) | |
205 | { | |
206 | struct pci_dev *pdev = to_pci_dev(dev); | |
207 | ||
208 | if (!pdev->subordinate) | |
209 | return 0; | |
210 | ||
211 | return sprintf (buf, "%u\n", | |
212 | !(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI)); | |
213 | } | |
214 | ||
215 | static ssize_t | |
216 | msi_bus_store(struct device *dev, struct device_attribute *attr, | |
217 | const char *buf, size_t count) | |
218 | { | |
219 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 TP |
220 | unsigned long val; |
221 | ||
222 | if (strict_strtoul(buf, 0, &val) < 0) | |
223 | return -EINVAL; | |
fe97064c BG |
224 | |
225 | /* bad things may happen if the no_msi flag is changed | |
226 | * while some drivers are loaded */ | |
227 | if (!capable(CAP_SYS_ADMIN)) | |
92425a40 | 228 | return -EPERM; |
fe97064c | 229 | |
92425a40 TP |
230 | /* Maybe pci devices without subordinate busses shouldn't even have this |
231 | * attribute in the first place? */ | |
fe97064c BG |
232 | if (!pdev->subordinate) |
233 | return count; | |
234 | ||
92425a40 TP |
235 | /* Is the flag going to change, or keep the value it already had? */ |
236 | if (!(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) ^ | |
237 | !!val) { | |
238 | pdev->subordinate->bus_flags ^= PCI_BUS_FLAGS_NO_MSI; | |
fe97064c | 239 | |
92425a40 TP |
240 | dev_warn(&pdev->dev, "forced subordinate bus to%s support MSI," |
241 | " bad things could happen\n", val ? "" : " not"); | |
fe97064c BG |
242 | } |
243 | ||
244 | return count; | |
245 | } | |
9888549e | 246 | |
705b1aaa AC |
247 | #ifdef CONFIG_HOTPLUG |
248 | static DEFINE_MUTEX(pci_remove_rescan_mutex); | |
249 | static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf, | |
250 | size_t count) | |
251 | { | |
252 | unsigned long val; | |
253 | struct pci_bus *b = NULL; | |
254 | ||
255 | if (strict_strtoul(buf, 0, &val) < 0) | |
256 | return -EINVAL; | |
257 | ||
258 | if (val) { | |
259 | mutex_lock(&pci_remove_rescan_mutex); | |
260 | while ((b = pci_find_next_bus(b)) != NULL) | |
261 | pci_rescan_bus(b); | |
262 | mutex_unlock(&pci_remove_rescan_mutex); | |
263 | } | |
264 | return count; | |
265 | } | |
266 | ||
267 | struct bus_attribute pci_bus_attrs[] = { | |
268 | __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store), | |
269 | __ATTR_NULL | |
270 | }; | |
77c27c7b | 271 | |
738a6396 AC |
272 | static ssize_t |
273 | dev_rescan_store(struct device *dev, struct device_attribute *attr, | |
274 | const char *buf, size_t count) | |
275 | { | |
276 | unsigned long val; | |
277 | struct pci_dev *pdev = to_pci_dev(dev); | |
278 | ||
279 | if (strict_strtoul(buf, 0, &val) < 0) | |
280 | return -EINVAL; | |
281 | ||
282 | if (val) { | |
283 | mutex_lock(&pci_remove_rescan_mutex); | |
284 | pci_rescan_bus(pdev->bus); | |
285 | mutex_unlock(&pci_remove_rescan_mutex); | |
286 | } | |
287 | return count; | |
288 | } | |
289 | ||
77c27c7b AC |
290 | static void remove_callback(struct device *dev) |
291 | { | |
292 | struct pci_dev *pdev = to_pci_dev(dev); | |
293 | ||
294 | mutex_lock(&pci_remove_rescan_mutex); | |
295 | pci_remove_bus_device(pdev); | |
296 | mutex_unlock(&pci_remove_rescan_mutex); | |
297 | } | |
298 | ||
299 | static ssize_t | |
300 | remove_store(struct device *dev, struct device_attribute *dummy, | |
301 | const char *buf, size_t count) | |
302 | { | |
303 | int ret = 0; | |
304 | unsigned long val; | |
77c27c7b AC |
305 | |
306 | if (strict_strtoul(buf, 0, &val) < 0) | |
307 | return -EINVAL; | |
308 | ||
77c27c7b AC |
309 | /* An attribute cannot be unregistered by one of its own methods, |
310 | * so we have to use this roundabout approach. | |
311 | */ | |
312 | if (val) | |
313 | ret = device_schedule_callback(dev, remove_callback); | |
314 | if (ret) | |
315 | count = ret; | |
316 | return count; | |
317 | } | |
705b1aaa AC |
318 | #endif |
319 | ||
1da177e4 LT |
320 | struct device_attribute pci_dev_attrs[] = { |
321 | __ATTR_RO(resource), | |
322 | __ATTR_RO(vendor), | |
323 | __ATTR_RO(device), | |
324 | __ATTR_RO(subsystem_vendor), | |
325 | __ATTR_RO(subsystem_device), | |
326 | __ATTR_RO(class), | |
327 | __ATTR_RO(irq), | |
328 | __ATTR_RO(local_cpus), | |
39106dcf | 329 | __ATTR_RO(local_cpulist), |
9888549e | 330 | __ATTR_RO(modalias), |
81bb0e19 BG |
331 | #ifdef CONFIG_NUMA |
332 | __ATTR_RO(numa_node), | |
333 | #endif | |
bb965401 YL |
334 | __ATTR_RO(dma_mask_bits), |
335 | __ATTR_RO(consistent_dma_mask_bits), | |
9f125d30 | 336 | __ATTR(enable, 0600, is_enabled_show, is_enabled_store), |
bdee9d98 DT |
337 | __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR), |
338 | broken_parity_status_show,broken_parity_status_store), | |
fe97064c | 339 | __ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store), |
77c27c7b AC |
340 | #ifdef CONFIG_HOTPLUG |
341 | __ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store), | |
738a6396 | 342 | __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store), |
77c27c7b | 343 | #endif |
1da177e4 LT |
344 | __ATTR_NULL, |
345 | }; | |
346 | ||
217f45de DA |
347 | static ssize_t |
348 | boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf) | |
349 | { | |
350 | struct pci_dev *pdev = to_pci_dev(dev); | |
351 | ||
352 | return sprintf(buf, "%u\n", | |
353 | !!(pdev->resource[PCI_ROM_RESOURCE].flags & | |
354 | IORESOURCE_ROM_SHADOW)); | |
355 | } | |
356 | struct device_attribute vga_attr = __ATTR_RO(boot_vga); | |
357 | ||
1da177e4 | 358 | static ssize_t |
91a69029 ZR |
359 | pci_read_config(struct kobject *kobj, struct bin_attribute *bin_attr, |
360 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
361 | { |
362 | struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); | |
363 | unsigned int size = 64; | |
364 | loff_t init_off = off; | |
4c0619ad | 365 | u8 *data = (u8*) buf; |
1da177e4 LT |
366 | |
367 | /* Several chips lock up trying to read undefined config space */ | |
368 | if (capable(CAP_SYS_ADMIN)) { | |
369 | size = dev->cfg_size; | |
370 | } else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { | |
371 | size = 128; | |
372 | } | |
373 | ||
374 | if (off > size) | |
375 | return 0; | |
376 | if (off + count > size) { | |
377 | size -= off; | |
378 | count = size; | |
379 | } else { | |
380 | size = count; | |
381 | } | |
382 | ||
4c0619ad SS |
383 | if ((off & 1) && size) { |
384 | u8 val; | |
e04b0ea2 | 385 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 386 | data[off - init_off] = val; |
1da177e4 | 387 | off++; |
4c0619ad SS |
388 | size--; |
389 | } | |
390 | ||
391 | if ((off & 3) && size > 2) { | |
392 | u16 val; | |
e04b0ea2 | 393 | pci_user_read_config_word(dev, off, &val); |
4c0619ad SS |
394 | data[off - init_off] = val & 0xff; |
395 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
396 | off += 2; | |
397 | size -= 2; | |
1da177e4 LT |
398 | } |
399 | ||
400 | while (size > 3) { | |
4c0619ad | 401 | u32 val; |
e04b0ea2 | 402 | pci_user_read_config_dword(dev, off, &val); |
4c0619ad SS |
403 | data[off - init_off] = val & 0xff; |
404 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
405 | data[off - init_off + 2] = (val >> 16) & 0xff; | |
406 | data[off - init_off + 3] = (val >> 24) & 0xff; | |
1da177e4 LT |
407 | off += 4; |
408 | size -= 4; | |
409 | } | |
410 | ||
4c0619ad SS |
411 | if (size >= 2) { |
412 | u16 val; | |
e04b0ea2 | 413 | pci_user_read_config_word(dev, off, &val); |
4c0619ad SS |
414 | data[off - init_off] = val & 0xff; |
415 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
416 | off += 2; | |
417 | size -= 2; | |
418 | } | |
419 | ||
420 | if (size > 0) { | |
421 | u8 val; | |
e04b0ea2 | 422 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 423 | data[off - init_off] = val; |
1da177e4 LT |
424 | off++; |
425 | --size; | |
426 | } | |
427 | ||
428 | return count; | |
429 | } | |
430 | ||
431 | static ssize_t | |
91a69029 ZR |
432 | pci_write_config(struct kobject *kobj, struct bin_attribute *bin_attr, |
433 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
434 | { |
435 | struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); | |
436 | unsigned int size = count; | |
437 | loff_t init_off = off; | |
4c0619ad | 438 | u8 *data = (u8*) buf; |
1da177e4 LT |
439 | |
440 | if (off > dev->cfg_size) | |
441 | return 0; | |
442 | if (off + count > dev->cfg_size) { | |
443 | size = dev->cfg_size - off; | |
444 | count = size; | |
445 | } | |
4c0619ad SS |
446 | |
447 | if ((off & 1) && size) { | |
e04b0ea2 | 448 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 | 449 | off++; |
4c0619ad | 450 | size--; |
1da177e4 | 451 | } |
4c0619ad SS |
452 | |
453 | if ((off & 3) && size > 2) { | |
454 | u16 val = data[off - init_off]; | |
455 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 456 | pci_user_write_config_word(dev, off, val); |
4c0619ad SS |
457 | off += 2; |
458 | size -= 2; | |
459 | } | |
1da177e4 LT |
460 | |
461 | while (size > 3) { | |
4c0619ad SS |
462 | u32 val = data[off - init_off]; |
463 | val |= (u32) data[off - init_off + 1] << 8; | |
464 | val |= (u32) data[off - init_off + 2] << 16; | |
465 | val |= (u32) data[off - init_off + 3] << 24; | |
e04b0ea2 | 466 | pci_user_write_config_dword(dev, off, val); |
1da177e4 LT |
467 | off += 4; |
468 | size -= 4; | |
469 | } | |
4c0619ad SS |
470 | |
471 | if (size >= 2) { | |
472 | u16 val = data[off - init_off]; | |
473 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 474 | pci_user_write_config_word(dev, off, val); |
4c0619ad SS |
475 | off += 2; |
476 | size -= 2; | |
477 | } | |
1da177e4 | 478 | |
4c0619ad | 479 | if (size) { |
e04b0ea2 | 480 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 LT |
481 | off++; |
482 | --size; | |
483 | } | |
484 | ||
485 | return count; | |
486 | } | |
487 | ||
94e61088 | 488 | static ssize_t |
287d19ce SH |
489 | read_vpd_attr(struct kobject *kobj, struct bin_attribute *bin_attr, |
490 | char *buf, loff_t off, size_t count) | |
94e61088 BH |
491 | { |
492 | struct pci_dev *dev = | |
493 | to_pci_dev(container_of(kobj, struct device, kobj)); | |
94e61088 BH |
494 | |
495 | if (off > bin_attr->size) | |
496 | count = 0; | |
497 | else if (count > bin_attr->size - off) | |
498 | count = bin_attr->size - off; | |
94e61088 | 499 | |
287d19ce | 500 | return pci_read_vpd(dev, off, count, buf); |
94e61088 BH |
501 | } |
502 | ||
503 | static ssize_t | |
287d19ce SH |
504 | write_vpd_attr(struct kobject *kobj, struct bin_attribute *bin_attr, |
505 | char *buf, loff_t off, size_t count) | |
94e61088 BH |
506 | { |
507 | struct pci_dev *dev = | |
508 | to_pci_dev(container_of(kobj, struct device, kobj)); | |
94e61088 BH |
509 | |
510 | if (off > bin_attr->size) | |
511 | count = 0; | |
512 | else if (count > bin_attr->size - off) | |
513 | count = bin_attr->size - off; | |
94e61088 | 514 | |
287d19ce | 515 | return pci_write_vpd(dev, off, count, buf); |
94e61088 BH |
516 | } |
517 | ||
1da177e4 LT |
518 | #ifdef HAVE_PCI_LEGACY |
519 | /** | |
520 | * pci_read_legacy_io - read byte(s) from legacy I/O port space | |
521 | * @kobj: kobject corresponding to file to read from | |
cffb2faf | 522 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
523 | * @buf: buffer to store results |
524 | * @off: offset into legacy I/O port space | |
525 | * @count: number of bytes to read | |
526 | * | |
527 | * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
528 | * callback routine (pci_legacy_read). | |
529 | */ | |
f19aeb1f | 530 | static ssize_t |
91a69029 ZR |
531 | pci_read_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr, |
532 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
533 | { |
534 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 535 | struct device, |
1da177e4 LT |
536 | kobj)); |
537 | ||
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_read(bus, off, (u32 *)buf, count); | |
543 | } | |
544 | ||
545 | /** | |
546 | * pci_write_legacy_io - write byte(s) to legacy I/O port space | |
547 | * @kobj: kobject corresponding to file to read from | |
cffb2faf | 548 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
549 | * @buf: buffer containing value to be written |
550 | * @off: offset into legacy I/O port space | |
551 | * @count: number of bytes to write | |
552 | * | |
553 | * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
554 | * callback routine (pci_legacy_write). | |
555 | */ | |
f19aeb1f | 556 | static ssize_t |
91a69029 ZR |
557 | pci_write_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr, |
558 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
559 | { |
560 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 561 | struct device, |
1da177e4 LT |
562 | kobj)); |
563 | /* Only support 1, 2 or 4 byte accesses */ | |
564 | if (count != 1 && count != 2 && count != 4) | |
565 | return -EINVAL; | |
566 | ||
567 | return pci_legacy_write(bus, off, *(u32 *)buf, count); | |
568 | } | |
569 | ||
570 | /** | |
571 | * pci_mmap_legacy_mem - map legacy PCI memory into user memory space | |
572 | * @kobj: kobject corresponding to device to be mapped | |
573 | * @attr: struct bin_attribute for this file | |
574 | * @vma: struct vm_area_struct passed to mmap | |
575 | * | |
f19aeb1f | 576 | * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap |
1da177e4 LT |
577 | * legacy memory space (first meg of bus space) into application virtual |
578 | * memory space. | |
579 | */ | |
f19aeb1f | 580 | static int |
1da177e4 LT |
581 | pci_mmap_legacy_mem(struct kobject *kobj, struct bin_attribute *attr, |
582 | struct vm_area_struct *vma) | |
583 | { | |
584 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 585 | struct device, |
1da177e4 LT |
586 | kobj)); |
587 | ||
f19aeb1f BH |
588 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem); |
589 | } | |
590 | ||
591 | /** | |
592 | * pci_mmap_legacy_io - map legacy PCI IO into user memory space | |
593 | * @kobj: kobject corresponding to device to be mapped | |
594 | * @attr: struct bin_attribute for this file | |
595 | * @vma: struct vm_area_struct passed to mmap | |
596 | * | |
597 | * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap | |
598 | * legacy IO space (first meg of bus space) into application virtual | |
599 | * memory space. Returns -ENOSYS if the operation isn't supported | |
600 | */ | |
601 | static int | |
602 | pci_mmap_legacy_io(struct kobject *kobj, struct bin_attribute *attr, | |
603 | struct vm_area_struct *vma) | |
604 | { | |
605 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
606 | struct device, | |
607 | kobj)); | |
608 | ||
609 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io); | |
610 | } | |
611 | ||
10a0ef39 IK |
612 | /** |
613 | * pci_adjust_legacy_attr - adjustment of legacy file attributes | |
614 | * @b: bus to create files under | |
615 | * @mmap_type: I/O port or memory | |
616 | * | |
617 | * Stub implementation. Can be overridden by arch if necessary. | |
618 | */ | |
619 | void __weak | |
620 | pci_adjust_legacy_attr(struct pci_bus *b, enum pci_mmap_state mmap_type) | |
621 | { | |
622 | return; | |
623 | } | |
624 | ||
f19aeb1f BH |
625 | /** |
626 | * pci_create_legacy_files - create legacy I/O port and memory files | |
627 | * @b: bus to create files under | |
628 | * | |
629 | * Some platforms allow access to legacy I/O port and ISA memory space on | |
630 | * a per-bus basis. This routine creates the files and ties them into | |
631 | * their associated read, write and mmap files from pci-sysfs.c | |
632 | * | |
633 | * On error unwind, but don't propogate the error to the caller | |
634 | * as it is ok to set up the PCI bus without these files. | |
635 | */ | |
636 | void pci_create_legacy_files(struct pci_bus *b) | |
637 | { | |
638 | int error; | |
639 | ||
640 | b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2, | |
641 | GFP_ATOMIC); | |
642 | if (!b->legacy_io) | |
643 | goto kzalloc_err; | |
644 | ||
62e877b8 | 645 | sysfs_bin_attr_init(b->legacy_io); |
f19aeb1f BH |
646 | b->legacy_io->attr.name = "legacy_io"; |
647 | b->legacy_io->size = 0xffff; | |
648 | b->legacy_io->attr.mode = S_IRUSR | S_IWUSR; | |
649 | b->legacy_io->read = pci_read_legacy_io; | |
650 | b->legacy_io->write = pci_write_legacy_io; | |
651 | b->legacy_io->mmap = pci_mmap_legacy_io; | |
10a0ef39 | 652 | pci_adjust_legacy_attr(b, pci_mmap_io); |
f19aeb1f BH |
653 | error = device_create_bin_file(&b->dev, b->legacy_io); |
654 | if (error) | |
655 | goto legacy_io_err; | |
656 | ||
657 | /* Allocated above after the legacy_io struct */ | |
658 | b->legacy_mem = b->legacy_io + 1; | |
6757eca3 | 659 | sysfs_bin_attr_init(b->legacy_mem); |
f19aeb1f BH |
660 | b->legacy_mem->attr.name = "legacy_mem"; |
661 | b->legacy_mem->size = 1024*1024; | |
662 | b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR; | |
663 | b->legacy_mem->mmap = pci_mmap_legacy_mem; | |
10a0ef39 | 664 | pci_adjust_legacy_attr(b, pci_mmap_mem); |
f19aeb1f BH |
665 | error = device_create_bin_file(&b->dev, b->legacy_mem); |
666 | if (error) | |
667 | goto legacy_mem_err; | |
668 | ||
669 | return; | |
670 | ||
671 | legacy_mem_err: | |
672 | device_remove_bin_file(&b->dev, b->legacy_io); | |
673 | legacy_io_err: | |
674 | kfree(b->legacy_io); | |
675 | b->legacy_io = NULL; | |
676 | kzalloc_err: | |
677 | printk(KERN_WARNING "pci: warning: could not create legacy I/O port " | |
678 | "and ISA memory resources to sysfs\n"); | |
679 | return; | |
680 | } | |
681 | ||
682 | void pci_remove_legacy_files(struct pci_bus *b) | |
683 | { | |
684 | if (b->legacy_io) { | |
685 | device_remove_bin_file(&b->dev, b->legacy_io); | |
686 | device_remove_bin_file(&b->dev, b->legacy_mem); | |
687 | kfree(b->legacy_io); /* both are allocated here */ | |
688 | } | |
1da177e4 LT |
689 | } |
690 | #endif /* HAVE_PCI_LEGACY */ | |
691 | ||
692 | #ifdef HAVE_PCI_MMAP | |
b5ff7df3 | 693 | |
9eff02e2 | 694 | int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma) |
b5ff7df3 LT |
695 | { |
696 | unsigned long nr, start, size; | |
697 | ||
698 | nr = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; | |
699 | start = vma->vm_pgoff; | |
88e7df0b | 700 | size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1; |
b5ff7df3 LT |
701 | if (start < size && size - start >= nr) |
702 | return 1; | |
703 | WARN(1, "process \"%s\" tried to map 0x%08lx-0x%08lx on %s BAR %d (size 0x%08lx)\n", | |
704 | current->comm, start, start+nr, pci_name(pdev), resno, size); | |
705 | return 0; | |
706 | } | |
707 | ||
1da177e4 LT |
708 | /** |
709 | * pci_mmap_resource - map a PCI resource into user memory space | |
710 | * @kobj: kobject for mapping | |
711 | * @attr: struct bin_attribute for the file being mapped | |
712 | * @vma: struct vm_area_struct passed into the mmap | |
45aec1ae | 713 | * @write_combine: 1 for write_combine mapping |
1da177e4 LT |
714 | * |
715 | * Use the regular PCI mapping routines to map a PCI resource into userspace. | |
1da177e4 LT |
716 | */ |
717 | static int | |
718 | pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr, | |
45aec1ae | 719 | struct vm_area_struct *vma, int write_combine) |
1da177e4 LT |
720 | { |
721 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, | |
722 | struct device, kobj)); | |
723 | struct resource *res = (struct resource *)attr->private; | |
724 | enum pci_mmap_state mmap_type; | |
e31dd6e4 | 725 | resource_size_t start, end; |
2311b1f2 | 726 | int i; |
1da177e4 | 727 | |
2311b1f2 ME |
728 | for (i = 0; i < PCI_ROM_RESOURCE; i++) |
729 | if (res == &pdev->resource[i]) | |
730 | break; | |
731 | if (i >= PCI_ROM_RESOURCE) | |
732 | return -ENODEV; | |
733 | ||
b5ff7df3 LT |
734 | if (!pci_mmap_fits(pdev, i, vma)) |
735 | return -EINVAL; | |
736 | ||
2311b1f2 ME |
737 | /* pci_mmap_page_range() expects the same kind of entry as coming |
738 | * from /proc/bus/pci/ which is a "user visible" value. If this is | |
739 | * different from the resource itself, arch will do necessary fixup. | |
740 | */ | |
741 | pci_resource_to_user(pdev, i, res, &start, &end); | |
742 | vma->vm_pgoff += start >> PAGE_SHIFT; | |
1da177e4 LT |
743 | mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io; |
744 | ||
e8de1481 AV |
745 | if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(start)) |
746 | return -EINVAL; | |
747 | ||
45aec1ae | 748 | return pci_mmap_page_range(pdev, vma, mmap_type, write_combine); |
749 | } | |
750 | ||
751 | static int | |
752 | pci_mmap_resource_uc(struct kobject *kobj, struct bin_attribute *attr, | |
753 | struct vm_area_struct *vma) | |
754 | { | |
755 | return pci_mmap_resource(kobj, attr, vma, 0); | |
756 | } | |
757 | ||
758 | static int | |
759 | pci_mmap_resource_wc(struct kobject *kobj, struct bin_attribute *attr, | |
760 | struct vm_area_struct *vma) | |
761 | { | |
762 | return pci_mmap_resource(kobj, attr, vma, 1); | |
1da177e4 LT |
763 | } |
764 | ||
b19441af GKH |
765 | /** |
766 | * pci_remove_resource_files - cleanup resource files | |
cffb2faf | 767 | * @pdev: dev to cleanup |
b19441af | 768 | * |
cffb2faf | 769 | * If we created resource files for @pdev, remove them from sysfs and |
b19441af GKH |
770 | * free their resources. |
771 | */ | |
772 | static void | |
773 | pci_remove_resource_files(struct pci_dev *pdev) | |
774 | { | |
775 | int i; | |
776 | ||
777 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
778 | struct bin_attribute *res_attr; | |
779 | ||
780 | res_attr = pdev->res_attr[i]; | |
781 | if (res_attr) { | |
782 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
783 | kfree(res_attr); | |
784 | } | |
45aec1ae | 785 | |
786 | res_attr = pdev->res_attr_wc[i]; | |
787 | if (res_attr) { | |
788 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
789 | kfree(res_attr); | |
790 | } | |
b19441af GKH |
791 | } |
792 | } | |
793 | ||
45aec1ae | 794 | static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine) |
795 | { | |
796 | /* allocate attribute structure, piggyback attribute name */ | |
797 | int name_len = write_combine ? 13 : 10; | |
798 | struct bin_attribute *res_attr; | |
799 | int retval; | |
800 | ||
801 | res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC); | |
802 | if (res_attr) { | |
803 | char *res_attr_name = (char *)(res_attr + 1); | |
804 | ||
a07e4156 | 805 | sysfs_bin_attr_init(res_attr); |
45aec1ae | 806 | if (write_combine) { |
807 | pdev->res_attr_wc[num] = res_attr; | |
808 | sprintf(res_attr_name, "resource%d_wc", num); | |
809 | res_attr->mmap = pci_mmap_resource_wc; | |
810 | } else { | |
811 | pdev->res_attr[num] = res_attr; | |
812 | sprintf(res_attr_name, "resource%d", num); | |
813 | res_attr->mmap = pci_mmap_resource_uc; | |
814 | } | |
815 | res_attr->attr.name = res_attr_name; | |
816 | res_attr->attr.mode = S_IRUSR | S_IWUSR; | |
817 | res_attr->size = pci_resource_len(pdev, num); | |
818 | res_attr->private = &pdev->resource[num]; | |
819 | retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr); | |
820 | } else | |
821 | retval = -ENOMEM; | |
822 | ||
823 | return retval; | |
824 | } | |
825 | ||
1da177e4 LT |
826 | /** |
827 | * pci_create_resource_files - create resource files in sysfs for @dev | |
cffb2faf | 828 | * @pdev: dev in question |
1da177e4 | 829 | * |
cffb2faf | 830 | * Walk the resources in @pdev creating files for each resource available. |
1da177e4 | 831 | */ |
b19441af | 832 | static int pci_create_resource_files(struct pci_dev *pdev) |
1da177e4 LT |
833 | { |
834 | int i; | |
b19441af | 835 | int retval; |
1da177e4 LT |
836 | |
837 | /* Expose the PCI resources from this device as files */ | |
838 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
1da177e4 LT |
839 | |
840 | /* skip empty resources */ | |
841 | if (!pci_resource_len(pdev, i)) | |
842 | continue; | |
843 | ||
45aec1ae | 844 | retval = pci_create_attr(pdev, i, 0); |
845 | /* for prefetchable resources, create a WC mappable file */ | |
846 | if (!retval && pdev->resource[i].flags & IORESOURCE_PREFETCH) | |
847 | retval = pci_create_attr(pdev, i, 1); | |
848 | ||
849 | if (retval) { | |
850 | pci_remove_resource_files(pdev); | |
851 | return retval; | |
1da177e4 LT |
852 | } |
853 | } | |
b19441af | 854 | return 0; |
1da177e4 LT |
855 | } |
856 | #else /* !HAVE_PCI_MMAP */ | |
10a0ef39 IK |
857 | int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; } |
858 | void __weak pci_remove_resource_files(struct pci_dev *dev) { return; } | |
1da177e4 LT |
859 | #endif /* HAVE_PCI_MMAP */ |
860 | ||
861 | /** | |
862 | * pci_write_rom - used to enable access to the PCI ROM display | |
863 | * @kobj: kernel object handle | |
cffb2faf | 864 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
865 | * @buf: user input |
866 | * @off: file offset | |
867 | * @count: number of byte in input | |
868 | * | |
869 | * writing anything except 0 enables it | |
870 | */ | |
871 | static ssize_t | |
91a69029 ZR |
872 | pci_write_rom(struct kobject *kobj, struct bin_attribute *bin_attr, |
873 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
874 | { |
875 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj)); | |
876 | ||
877 | if ((off == 0) && (*buf == '0') && (count == 2)) | |
878 | pdev->rom_attr_enabled = 0; | |
879 | else | |
880 | pdev->rom_attr_enabled = 1; | |
881 | ||
882 | return count; | |
883 | } | |
884 | ||
885 | /** | |
886 | * pci_read_rom - read a PCI ROM | |
887 | * @kobj: kernel object handle | |
cffb2faf | 888 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
889 | * @buf: where to put the data we read from the ROM |
890 | * @off: file offset | |
891 | * @count: number of bytes to read | |
892 | * | |
893 | * Put @count bytes starting at @off into @buf from the ROM in the PCI | |
894 | * device corresponding to @kobj. | |
895 | */ | |
896 | static ssize_t | |
91a69029 ZR |
897 | pci_read_rom(struct kobject *kobj, struct bin_attribute *bin_attr, |
898 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
899 | { |
900 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj)); | |
901 | void __iomem *rom; | |
902 | size_t size; | |
903 | ||
904 | if (!pdev->rom_attr_enabled) | |
905 | return -EINVAL; | |
906 | ||
907 | rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */ | |
97c44836 TN |
908 | if (!rom || !size) |
909 | return -EIO; | |
1da177e4 LT |
910 | |
911 | if (off >= size) | |
912 | count = 0; | |
913 | else { | |
914 | if (off + count > size) | |
915 | count = size - off; | |
916 | ||
917 | memcpy_fromio(buf, rom + off, count); | |
918 | } | |
919 | pci_unmap_rom(pdev, rom); | |
920 | ||
921 | return count; | |
922 | } | |
923 | ||
924 | static struct bin_attribute pci_config_attr = { | |
925 | .attr = { | |
926 | .name = "config", | |
927 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 928 | }, |
557848c3 | 929 | .size = PCI_CFG_SPACE_SIZE, |
1da177e4 LT |
930 | .read = pci_read_config, |
931 | .write = pci_write_config, | |
932 | }; | |
933 | ||
934 | static struct bin_attribute pcie_config_attr = { | |
935 | .attr = { | |
936 | .name = "config", | |
937 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 938 | }, |
557848c3 | 939 | .size = PCI_CFG_SPACE_EXP_SIZE, |
1da177e4 LT |
940 | .read = pci_read_config, |
941 | .write = pci_write_config, | |
942 | }; | |
943 | ||
a2cd52ca | 944 | int __attribute__ ((weak)) pcibios_add_platform_entries(struct pci_dev *dev) |
575e3348 | 945 | { |
a2cd52ca | 946 | return 0; |
575e3348 ME |
947 | } |
948 | ||
711d5779 MT |
949 | static ssize_t reset_store(struct device *dev, |
950 | struct device_attribute *attr, const char *buf, | |
951 | size_t count) | |
952 | { | |
953 | struct pci_dev *pdev = to_pci_dev(dev); | |
954 | unsigned long val; | |
955 | ssize_t result = strict_strtoul(buf, 0, &val); | |
956 | ||
957 | if (result < 0) | |
958 | return result; | |
959 | ||
960 | if (val != 1) | |
961 | return -EINVAL; | |
962 | return pci_reset_function(pdev); | |
963 | } | |
964 | ||
965 | static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store); | |
966 | ||
280c73d3 ZY |
967 | static int pci_create_capabilities_sysfs(struct pci_dev *dev) |
968 | { | |
969 | int retval; | |
970 | struct bin_attribute *attr; | |
971 | ||
972 | /* If the device has VPD, try to expose it in sysfs. */ | |
973 | if (dev->vpd) { | |
974 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); | |
975 | if (!attr) | |
976 | return -ENOMEM; | |
977 | ||
a07e4156 | 978 | sysfs_bin_attr_init(attr); |
280c73d3 ZY |
979 | attr->size = dev->vpd->len; |
980 | attr->attr.name = "vpd"; | |
981 | attr->attr.mode = S_IRUSR | S_IWUSR; | |
287d19ce SH |
982 | attr->read = read_vpd_attr; |
983 | attr->write = write_vpd_attr; | |
280c73d3 ZY |
984 | retval = sysfs_create_bin_file(&dev->dev.kobj, attr); |
985 | if (retval) { | |
986 | kfree(dev->vpd->attr); | |
987 | return retval; | |
988 | } | |
989 | dev->vpd->attr = attr; | |
990 | } | |
991 | ||
992 | /* Active State Power Management */ | |
993 | pcie_aspm_create_sysfs_dev_files(dev); | |
994 | ||
711d5779 MT |
995 | if (!pci_probe_reset_function(dev)) { |
996 | retval = device_create_file(&dev->dev, &reset_attr); | |
997 | if (retval) | |
998 | goto error; | |
999 | dev->reset_fn = 1; | |
1000 | } | |
280c73d3 | 1001 | return 0; |
711d5779 MT |
1002 | |
1003 | error: | |
1004 | pcie_aspm_remove_sysfs_dev_files(dev); | |
1005 | if (dev->vpd && dev->vpd->attr) { | |
1006 | sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr); | |
1007 | kfree(dev->vpd->attr); | |
1008 | } | |
1009 | ||
1010 | return retval; | |
280c73d3 ZY |
1011 | } |
1012 | ||
b19441af | 1013 | int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev) |
1da177e4 | 1014 | { |
b19441af | 1015 | int retval; |
280c73d3 ZY |
1016 | int rom_size = 0; |
1017 | struct bin_attribute *attr; | |
b19441af | 1018 | |
1da177e4 LT |
1019 | if (!sysfs_initialized) |
1020 | return -EACCES; | |
1021 | ||
557848c3 | 1022 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
b19441af | 1023 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1da177e4 | 1024 | else |
b19441af GKH |
1025 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
1026 | if (retval) | |
1027 | goto err; | |
1da177e4 | 1028 | |
b19441af GKH |
1029 | retval = pci_create_resource_files(pdev); |
1030 | if (retval) | |
280c73d3 ZY |
1031 | goto err_config_file; |
1032 | ||
1033 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) | |
1034 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); | |
1035 | else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW) | |
1036 | rom_size = 0x20000; | |
1da177e4 LT |
1037 | |
1038 | /* If the device has a ROM, try to expose it in sysfs. */ | |
280c73d3 | 1039 | if (rom_size) { |
94e61088 | 1040 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); |
280c73d3 | 1041 | if (!attr) { |
b19441af | 1042 | retval = -ENOMEM; |
9890b12a | 1043 | goto err_resource_files; |
1da177e4 | 1044 | } |
a07e4156 | 1045 | sysfs_bin_attr_init(attr); |
280c73d3 ZY |
1046 | attr->size = rom_size; |
1047 | attr->attr.name = "rom"; | |
1048 | attr->attr.mode = S_IRUSR; | |
1049 | attr->read = pci_read_rom; | |
1050 | attr->write = pci_write_rom; | |
1051 | retval = sysfs_create_bin_file(&pdev->dev.kobj, attr); | |
1052 | if (retval) { | |
1053 | kfree(attr); | |
1054 | goto err_resource_files; | |
1055 | } | |
1056 | pdev->rom_attr = attr; | |
1da177e4 | 1057 | } |
280c73d3 | 1058 | |
217f45de DA |
1059 | if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) { |
1060 | retval = device_create_file(&pdev->dev, &vga_attr); | |
1061 | if (retval) | |
1062 | goto err_rom_file; | |
1063 | } | |
1064 | ||
1da177e4 | 1065 | /* add platform-specific attributes */ |
280c73d3 ZY |
1066 | retval = pcibios_add_platform_entries(pdev); |
1067 | if (retval) | |
217f45de | 1068 | goto err_vga_file; |
b19441af | 1069 | |
280c73d3 ZY |
1070 | /* add sysfs entries for various capabilities */ |
1071 | retval = pci_create_capabilities_sysfs(pdev); | |
1072 | if (retval) | |
217f45de | 1073 | goto err_vga_file; |
7d715a6c | 1074 | |
1da177e4 | 1075 | return 0; |
b19441af | 1076 | |
217f45de DA |
1077 | err_vga_file: |
1078 | if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) | |
1079 | device_remove_file(&pdev->dev, &vga_attr); | |
a2cd52ca | 1080 | err_rom_file: |
280c73d3 | 1081 | if (rom_size) { |
94e61088 | 1082 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); |
280c73d3 ZY |
1083 | kfree(pdev->rom_attr); |
1084 | pdev->rom_attr = NULL; | |
1085 | } | |
9890b12a ME |
1086 | err_resource_files: |
1087 | pci_remove_resource_files(pdev); | |
94e61088 | 1088 | err_config_file: |
557848c3 | 1089 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
b19441af GKH |
1090 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1091 | else | |
1092 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); | |
1093 | err: | |
1094 | return retval; | |
1da177e4 LT |
1095 | } |
1096 | ||
280c73d3 ZY |
1097 | static void pci_remove_capabilities_sysfs(struct pci_dev *dev) |
1098 | { | |
1099 | if (dev->vpd && dev->vpd->attr) { | |
1100 | sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr); | |
1101 | kfree(dev->vpd->attr); | |
1102 | } | |
1103 | ||
1104 | pcie_aspm_remove_sysfs_dev_files(dev); | |
711d5779 MT |
1105 | if (dev->reset_fn) { |
1106 | device_remove_file(&dev->dev, &reset_attr); | |
1107 | dev->reset_fn = 0; | |
1108 | } | |
280c73d3 ZY |
1109 | } |
1110 | ||
1da177e4 LT |
1111 | /** |
1112 | * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files | |
1113 | * @pdev: device whose entries we should free | |
1114 | * | |
1115 | * Cleanup when @pdev is removed from sysfs. | |
1116 | */ | |
1117 | void pci_remove_sysfs_dev_files(struct pci_dev *pdev) | |
1118 | { | |
280c73d3 ZY |
1119 | int rom_size = 0; |
1120 | ||
d67afe5e DM |
1121 | if (!sysfs_initialized) |
1122 | return; | |
1123 | ||
280c73d3 | 1124 | pci_remove_capabilities_sysfs(pdev); |
7d715a6c | 1125 | |
557848c3 | 1126 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
1da177e4 LT |
1127 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1128 | else | |
1129 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); | |
1130 | ||
1131 | pci_remove_resource_files(pdev); | |
1132 | ||
280c73d3 ZY |
1133 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) |
1134 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); | |
1135 | else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW) | |
1136 | rom_size = 0x20000; | |
1137 | ||
1138 | if (rom_size && pdev->rom_attr) { | |
1139 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); | |
1140 | kfree(pdev->rom_attr); | |
1da177e4 LT |
1141 | } |
1142 | } | |
1143 | ||
1144 | static int __init pci_sysfs_init(void) | |
1145 | { | |
1146 | struct pci_dev *pdev = NULL; | |
b19441af GKH |
1147 | int retval; |
1148 | ||
1da177e4 | 1149 | sysfs_initialized = 1; |
b19441af GKH |
1150 | for_each_pci_dev(pdev) { |
1151 | retval = pci_create_sysfs_dev_files(pdev); | |
151fc5df JL |
1152 | if (retval) { |
1153 | pci_dev_put(pdev); | |
b19441af | 1154 | return retval; |
151fc5df | 1155 | } |
b19441af | 1156 | } |
1da177e4 LT |
1157 | |
1158 | return 0; | |
1159 | } | |
1160 | ||
40ee9e9f | 1161 | late_initcall(pci_sysfs_init); |