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> |
5a0e3ad6 | 26 | #include <linux/slab.h> |
1da177e4 LT |
27 | #include "pci.h" |
28 | ||
29 | static int sysfs_initialized; /* = 0 */ | |
30 | ||
31 | /* show configuration fields */ | |
32 | #define pci_config_attr(field, format_string) \ | |
33 | static ssize_t \ | |
e404e274 | 34 | field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
35 | { \ |
36 | struct pci_dev *pdev; \ | |
37 | \ | |
38 | pdev = to_pci_dev (dev); \ | |
39 | return sprintf (buf, format_string, pdev->field); \ | |
40 | } | |
41 | ||
42 | pci_config_attr(vendor, "0x%04x\n"); | |
43 | pci_config_attr(device, "0x%04x\n"); | |
44 | pci_config_attr(subsystem_vendor, "0x%04x\n"); | |
45 | pci_config_attr(subsystem_device, "0x%04x\n"); | |
46 | pci_config_attr(class, "0x%06x\n"); | |
47 | pci_config_attr(irq, "%u\n"); | |
48 | ||
bdee9d98 DT |
49 | static ssize_t broken_parity_status_show(struct device *dev, |
50 | struct device_attribute *attr, | |
51 | char *buf) | |
52 | { | |
53 | struct pci_dev *pdev = to_pci_dev(dev); | |
54 | return sprintf (buf, "%u\n", pdev->broken_parity_status); | |
55 | } | |
56 | ||
57 | static ssize_t broken_parity_status_store(struct device *dev, | |
58 | struct device_attribute *attr, | |
59 | const char *buf, size_t count) | |
60 | { | |
61 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 | 62 | unsigned long val; |
bdee9d98 | 63 | |
92425a40 TP |
64 | if (strict_strtoul(buf, 0, &val) < 0) |
65 | return -EINVAL; | |
66 | ||
67 | pdev->broken_parity_status = !!val; | |
68 | ||
69 | return count; | |
bdee9d98 DT |
70 | } |
71 | ||
4327edf6 AC |
72 | static ssize_t local_cpus_show(struct device *dev, |
73 | struct device_attribute *attr, char *buf) | |
1da177e4 | 74 | { |
3be83050 | 75 | const struct cpumask *mask; |
4327edf6 AC |
76 | int len; |
77 | ||
e0cd5160 | 78 | #ifdef CONFIG_NUMA |
6be954d1 DJ |
79 | mask = (dev_to_node(dev) == -1) ? cpu_online_mask : |
80 | cpumask_of_node(dev_to_node(dev)); | |
e0cd5160 | 81 | #else |
3be83050 | 82 | mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); |
e0cd5160 | 83 | #endif |
3be83050 | 84 | len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask); |
39106dcf MT |
85 | buf[len++] = '\n'; |
86 | buf[len] = '\0'; | |
87 | return len; | |
88 | } | |
89 | ||
90 | ||
91 | static ssize_t local_cpulist_show(struct device *dev, | |
92 | struct device_attribute *attr, char *buf) | |
93 | { | |
3be83050 | 94 | const struct cpumask *mask; |
39106dcf MT |
95 | int len; |
96 | ||
e0cd5160 | 97 | #ifdef CONFIG_NUMA |
6be954d1 DJ |
98 | mask = (dev_to_node(dev) == -1) ? cpu_online_mask : |
99 | cpumask_of_node(dev_to_node(dev)); | |
e0cd5160 | 100 | #else |
3be83050 | 101 | mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); |
e0cd5160 | 102 | #endif |
3be83050 | 103 | len = cpulist_scnprintf(buf, PAGE_SIZE-2, mask); |
39106dcf MT |
104 | buf[len++] = '\n'; |
105 | buf[len] = '\0'; | |
106 | return len; | |
1da177e4 LT |
107 | } |
108 | ||
109 | /* show resources */ | |
110 | static ssize_t | |
e404e274 | 111 | resource_show(struct device * dev, struct device_attribute *attr, char * buf) |
1da177e4 LT |
112 | { |
113 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
114 | char * str = buf; | |
115 | int i; | |
fde09c6d | 116 | int max; |
e31dd6e4 | 117 | resource_size_t start, end; |
1da177e4 LT |
118 | |
119 | if (pci_dev->subordinate) | |
120 | max = DEVICE_COUNT_RESOURCE; | |
fde09c6d YZ |
121 | else |
122 | max = PCI_BRIDGE_RESOURCES; | |
1da177e4 LT |
123 | |
124 | for (i = 0; i < max; i++) { | |
2311b1f2 ME |
125 | struct resource *res = &pci_dev->resource[i]; |
126 | pci_resource_to_user(pci_dev, i, res, &start, &end); | |
127 | str += sprintf(str,"0x%016llx 0x%016llx 0x%016llx\n", | |
128 | (unsigned long long)start, | |
129 | (unsigned long long)end, | |
130 | (unsigned long long)res->flags); | |
1da177e4 LT |
131 | } |
132 | return (str - buf); | |
133 | } | |
134 | ||
87c8a443 | 135 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) |
9888549e GK |
136 | { |
137 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
138 | ||
139 | return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n", | |
140 | pci_dev->vendor, pci_dev->device, | |
141 | pci_dev->subsystem_vendor, pci_dev->subsystem_device, | |
142 | (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8), | |
143 | (u8)(pci_dev->class)); | |
144 | } | |
bae94d02 IPG |
145 | |
146 | static ssize_t is_enabled_store(struct device *dev, | |
147 | struct device_attribute *attr, const char *buf, | |
148 | size_t count) | |
9f125d30 AV |
149 | { |
150 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 TP |
151 | unsigned long val; |
152 | ssize_t result = strict_strtoul(buf, 0, &val); | |
153 | ||
154 | if (result < 0) | |
155 | return result; | |
9f125d30 AV |
156 | |
157 | /* this can crash the machine when done on the "wrong" device */ | |
158 | if (!capable(CAP_SYS_ADMIN)) | |
92425a40 | 159 | return -EPERM; |
9f125d30 | 160 | |
92425a40 | 161 | if (!val) { |
296ccb08 | 162 | if (pci_is_enabled(pdev)) |
bae94d02 IPG |
163 | pci_disable_device(pdev); |
164 | else | |
165 | result = -EIO; | |
92425a40 | 166 | } else |
bae94d02 | 167 | result = pci_enable_device(pdev); |
9f125d30 | 168 | |
bae94d02 IPG |
169 | return result < 0 ? result : count; |
170 | } | |
171 | ||
172 | static ssize_t is_enabled_show(struct device *dev, | |
173 | struct device_attribute *attr, char *buf) | |
174 | { | |
175 | struct pci_dev *pdev; | |
9f125d30 | 176 | |
bae94d02 IPG |
177 | pdev = to_pci_dev (dev); |
178 | return sprintf (buf, "%u\n", atomic_read(&pdev->enable_cnt)); | |
9f125d30 AV |
179 | } |
180 | ||
81bb0e19 BG |
181 | #ifdef CONFIG_NUMA |
182 | static ssize_t | |
183 | numa_node_show(struct device *dev, struct device_attribute *attr, char *buf) | |
184 | { | |
185 | return sprintf (buf, "%d\n", dev->numa_node); | |
186 | } | |
187 | #endif | |
188 | ||
bb965401 YL |
189 | static ssize_t |
190 | dma_mask_bits_show(struct device *dev, struct device_attribute *attr, char *buf) | |
191 | { | |
192 | struct pci_dev *pdev = to_pci_dev(dev); | |
193 | ||
194 | return sprintf (buf, "%d\n", fls64(pdev->dma_mask)); | |
195 | } | |
196 | ||
197 | static ssize_t | |
198 | consistent_dma_mask_bits_show(struct device *dev, struct device_attribute *attr, | |
199 | char *buf) | |
200 | { | |
201 | return sprintf (buf, "%d\n", fls64(dev->coherent_dma_mask)); | |
202 | } | |
203 | ||
fe97064c BG |
204 | static ssize_t |
205 | msi_bus_show(struct device *dev, struct device_attribute *attr, char *buf) | |
206 | { | |
207 | struct pci_dev *pdev = to_pci_dev(dev); | |
208 | ||
209 | if (!pdev->subordinate) | |
210 | return 0; | |
211 | ||
212 | return sprintf (buf, "%u\n", | |
213 | !(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI)); | |
214 | } | |
215 | ||
216 | static ssize_t | |
217 | msi_bus_store(struct device *dev, struct device_attribute *attr, | |
218 | const char *buf, size_t count) | |
219 | { | |
220 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 TP |
221 | unsigned long val; |
222 | ||
223 | if (strict_strtoul(buf, 0, &val) < 0) | |
224 | return -EINVAL; | |
fe97064c BG |
225 | |
226 | /* bad things may happen if the no_msi flag is changed | |
227 | * while some drivers are loaded */ | |
228 | if (!capable(CAP_SYS_ADMIN)) | |
92425a40 | 229 | return -EPERM; |
fe97064c | 230 | |
92425a40 TP |
231 | /* Maybe pci devices without subordinate busses shouldn't even have this |
232 | * attribute in the first place? */ | |
fe97064c BG |
233 | if (!pdev->subordinate) |
234 | return count; | |
235 | ||
92425a40 TP |
236 | /* Is the flag going to change, or keep the value it already had? */ |
237 | if (!(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) ^ | |
238 | !!val) { | |
239 | pdev->subordinate->bus_flags ^= PCI_BUS_FLAGS_NO_MSI; | |
fe97064c | 240 | |
92425a40 TP |
241 | dev_warn(&pdev->dev, "forced subordinate bus to%s support MSI," |
242 | " bad things could happen\n", val ? "" : " not"); | |
fe97064c BG |
243 | } |
244 | ||
245 | return count; | |
246 | } | |
9888549e | 247 | |
705b1aaa AC |
248 | #ifdef CONFIG_HOTPLUG |
249 | static DEFINE_MUTEX(pci_remove_rescan_mutex); | |
250 | static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf, | |
251 | size_t count) | |
252 | { | |
253 | unsigned long val; | |
254 | struct pci_bus *b = NULL; | |
255 | ||
256 | if (strict_strtoul(buf, 0, &val) < 0) | |
257 | return -EINVAL; | |
258 | ||
259 | if (val) { | |
260 | mutex_lock(&pci_remove_rescan_mutex); | |
261 | while ((b = pci_find_next_bus(b)) != NULL) | |
262 | pci_rescan_bus(b); | |
263 | mutex_unlock(&pci_remove_rescan_mutex); | |
264 | } | |
265 | return count; | |
266 | } | |
267 | ||
268 | struct bus_attribute pci_bus_attrs[] = { | |
269 | __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store), | |
270 | __ATTR_NULL | |
271 | }; | |
77c27c7b | 272 | |
738a6396 AC |
273 | static ssize_t |
274 | dev_rescan_store(struct device *dev, struct device_attribute *attr, | |
275 | const char *buf, size_t count) | |
276 | { | |
277 | unsigned long val; | |
278 | struct pci_dev *pdev = to_pci_dev(dev); | |
279 | ||
280 | if (strict_strtoul(buf, 0, &val) < 0) | |
281 | return -EINVAL; | |
282 | ||
283 | if (val) { | |
284 | mutex_lock(&pci_remove_rescan_mutex); | |
285 | pci_rescan_bus(pdev->bus); | |
286 | mutex_unlock(&pci_remove_rescan_mutex); | |
287 | } | |
288 | return count; | |
289 | } | |
290 | ||
77c27c7b AC |
291 | static void remove_callback(struct device *dev) |
292 | { | |
293 | struct pci_dev *pdev = to_pci_dev(dev); | |
294 | ||
295 | mutex_lock(&pci_remove_rescan_mutex); | |
296 | pci_remove_bus_device(pdev); | |
297 | mutex_unlock(&pci_remove_rescan_mutex); | |
298 | } | |
299 | ||
300 | static ssize_t | |
301 | remove_store(struct device *dev, struct device_attribute *dummy, | |
302 | const char *buf, size_t count) | |
303 | { | |
304 | int ret = 0; | |
305 | unsigned long val; | |
77c27c7b AC |
306 | |
307 | if (strict_strtoul(buf, 0, &val) < 0) | |
308 | return -EINVAL; | |
309 | ||
77c27c7b AC |
310 | /* An attribute cannot be unregistered by one of its own methods, |
311 | * so we have to use this roundabout approach. | |
312 | */ | |
313 | if (val) | |
314 | ret = device_schedule_callback(dev, remove_callback); | |
315 | if (ret) | |
316 | count = ret; | |
317 | return count; | |
318 | } | |
705b1aaa AC |
319 | #endif |
320 | ||
1da177e4 LT |
321 | struct device_attribute pci_dev_attrs[] = { |
322 | __ATTR_RO(resource), | |
323 | __ATTR_RO(vendor), | |
324 | __ATTR_RO(device), | |
325 | __ATTR_RO(subsystem_vendor), | |
326 | __ATTR_RO(subsystem_device), | |
327 | __ATTR_RO(class), | |
328 | __ATTR_RO(irq), | |
329 | __ATTR_RO(local_cpus), | |
39106dcf | 330 | __ATTR_RO(local_cpulist), |
9888549e | 331 | __ATTR_RO(modalias), |
81bb0e19 BG |
332 | #ifdef CONFIG_NUMA |
333 | __ATTR_RO(numa_node), | |
334 | #endif | |
bb965401 YL |
335 | __ATTR_RO(dma_mask_bits), |
336 | __ATTR_RO(consistent_dma_mask_bits), | |
9f125d30 | 337 | __ATTR(enable, 0600, is_enabled_show, is_enabled_store), |
bdee9d98 DT |
338 | __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR), |
339 | broken_parity_status_show,broken_parity_status_store), | |
fe97064c | 340 | __ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store), |
77c27c7b AC |
341 | #ifdef CONFIG_HOTPLUG |
342 | __ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store), | |
738a6396 | 343 | __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store), |
77c27c7b | 344 | #endif |
1da177e4 LT |
345 | __ATTR_NULL, |
346 | }; | |
347 | ||
217f45de DA |
348 | static ssize_t |
349 | boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf) | |
350 | { | |
351 | struct pci_dev *pdev = to_pci_dev(dev); | |
352 | ||
353 | return sprintf(buf, "%u\n", | |
354 | !!(pdev->resource[PCI_ROM_RESOURCE].flags & | |
355 | IORESOURCE_ROM_SHADOW)); | |
356 | } | |
357 | struct device_attribute vga_attr = __ATTR_RO(boot_vga); | |
358 | ||
1da177e4 | 359 | static ssize_t |
91a69029 ZR |
360 | pci_read_config(struct kobject *kobj, struct bin_attribute *bin_attr, |
361 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
362 | { |
363 | struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); | |
364 | unsigned int size = 64; | |
365 | loff_t init_off = off; | |
4c0619ad | 366 | u8 *data = (u8*) buf; |
1da177e4 LT |
367 | |
368 | /* Several chips lock up trying to read undefined config space */ | |
369 | if (capable(CAP_SYS_ADMIN)) { | |
370 | size = dev->cfg_size; | |
371 | } else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { | |
372 | size = 128; | |
373 | } | |
374 | ||
375 | if (off > size) | |
376 | return 0; | |
377 | if (off + count > size) { | |
378 | size -= off; | |
379 | count = size; | |
380 | } else { | |
381 | size = count; | |
382 | } | |
383 | ||
4c0619ad | 384 | if ((off & 1) && size) { |
385 | u8 val; | |
e04b0ea2 | 386 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 387 | data[off - init_off] = val; |
1da177e4 | 388 | off++; |
4c0619ad | 389 | size--; |
390 | } | |
391 | ||
392 | if ((off & 3) && size > 2) { | |
393 | u16 val; | |
e04b0ea2 | 394 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 395 | data[off - init_off] = val & 0xff; |
396 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
397 | off += 2; | |
398 | size -= 2; | |
1da177e4 LT |
399 | } |
400 | ||
401 | while (size > 3) { | |
4c0619ad | 402 | u32 val; |
e04b0ea2 | 403 | pci_user_read_config_dword(dev, off, &val); |
4c0619ad | 404 | data[off - init_off] = val & 0xff; |
405 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
406 | data[off - init_off + 2] = (val >> 16) & 0xff; | |
407 | data[off - init_off + 3] = (val >> 24) & 0xff; | |
1da177e4 LT |
408 | off += 4; |
409 | size -= 4; | |
410 | } | |
411 | ||
4c0619ad | 412 | if (size >= 2) { |
413 | u16 val; | |
e04b0ea2 | 414 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 415 | data[off - init_off] = val & 0xff; |
416 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
417 | off += 2; | |
418 | size -= 2; | |
419 | } | |
420 | ||
421 | if (size > 0) { | |
422 | u8 val; | |
e04b0ea2 | 423 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 424 | data[off - init_off] = val; |
1da177e4 LT |
425 | off++; |
426 | --size; | |
427 | } | |
428 | ||
429 | return count; | |
430 | } | |
431 | ||
432 | static ssize_t | |
91a69029 ZR |
433 | pci_write_config(struct kobject *kobj, struct bin_attribute *bin_attr, |
434 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
435 | { |
436 | struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); | |
437 | unsigned int size = count; | |
438 | loff_t init_off = off; | |
4c0619ad | 439 | u8 *data = (u8*) buf; |
1da177e4 LT |
440 | |
441 | if (off > dev->cfg_size) | |
442 | return 0; | |
443 | if (off + count > dev->cfg_size) { | |
444 | size = dev->cfg_size - off; | |
445 | count = size; | |
446 | } | |
4c0619ad | 447 | |
448 | if ((off & 1) && size) { | |
e04b0ea2 | 449 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 | 450 | off++; |
4c0619ad | 451 | size--; |
1da177e4 | 452 | } |
4c0619ad | 453 | |
454 | if ((off & 3) && size > 2) { | |
455 | u16 val = data[off - init_off]; | |
456 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 457 | pci_user_write_config_word(dev, off, val); |
4c0619ad | 458 | off += 2; |
459 | size -= 2; | |
460 | } | |
1da177e4 LT |
461 | |
462 | while (size > 3) { | |
4c0619ad | 463 | u32 val = data[off - init_off]; |
464 | val |= (u32) data[off - init_off + 1] << 8; | |
465 | val |= (u32) data[off - init_off + 2] << 16; | |
466 | val |= (u32) data[off - init_off + 3] << 24; | |
e04b0ea2 | 467 | pci_user_write_config_dword(dev, off, val); |
1da177e4 LT |
468 | off += 4; |
469 | size -= 4; | |
470 | } | |
4c0619ad | 471 | |
472 | if (size >= 2) { | |
473 | u16 val = data[off - init_off]; | |
474 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 475 | pci_user_write_config_word(dev, off, val); |
4c0619ad | 476 | off += 2; |
477 | size -= 2; | |
478 | } | |
1da177e4 | 479 | |
4c0619ad | 480 | if (size) { |
e04b0ea2 | 481 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 LT |
482 | off++; |
483 | --size; | |
484 | } | |
485 | ||
486 | return count; | |
487 | } | |
488 | ||
94e61088 | 489 | static ssize_t |
287d19ce SH |
490 | read_vpd_attr(struct kobject *kobj, struct bin_attribute *bin_attr, |
491 | char *buf, loff_t off, size_t count) | |
94e61088 BH |
492 | { |
493 | struct pci_dev *dev = | |
494 | to_pci_dev(container_of(kobj, struct device, kobj)); | |
94e61088 BH |
495 | |
496 | if (off > bin_attr->size) | |
497 | count = 0; | |
498 | else if (count > bin_attr->size - off) | |
499 | count = bin_attr->size - off; | |
94e61088 | 500 | |
287d19ce | 501 | return pci_read_vpd(dev, off, count, buf); |
94e61088 BH |
502 | } |
503 | ||
504 | static ssize_t | |
287d19ce SH |
505 | write_vpd_attr(struct kobject *kobj, struct bin_attribute *bin_attr, |
506 | char *buf, loff_t off, size_t count) | |
94e61088 BH |
507 | { |
508 | struct pci_dev *dev = | |
509 | to_pci_dev(container_of(kobj, struct device, kobj)); | |
94e61088 BH |
510 | |
511 | if (off > bin_attr->size) | |
512 | count = 0; | |
513 | else if (count > bin_attr->size - off) | |
514 | count = bin_attr->size - off; | |
94e61088 | 515 | |
287d19ce | 516 | return pci_write_vpd(dev, off, count, buf); |
94e61088 BH |
517 | } |
518 | ||
1da177e4 LT |
519 | #ifdef HAVE_PCI_LEGACY |
520 | /** | |
521 | * pci_read_legacy_io - read byte(s) from legacy I/O port space | |
522 | * @kobj: kobject corresponding to file to read from | |
cffb2faf | 523 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
524 | * @buf: buffer to store results |
525 | * @off: offset into legacy I/O port space | |
526 | * @count: number of bytes to read | |
527 | * | |
528 | * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
529 | * callback routine (pci_legacy_read). | |
530 | */ | |
f19aeb1f | 531 | static ssize_t |
91a69029 ZR |
532 | pci_read_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr, |
533 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
534 | { |
535 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 536 | struct device, |
1da177e4 LT |
537 | kobj)); |
538 | ||
539 | /* Only support 1, 2 or 4 byte accesses */ | |
540 | if (count != 1 && count != 2 && count != 4) | |
541 | return -EINVAL; | |
542 | ||
543 | return pci_legacy_read(bus, off, (u32 *)buf, count); | |
544 | } | |
545 | ||
546 | /** | |
547 | * pci_write_legacy_io - write byte(s) to legacy I/O port space | |
548 | * @kobj: kobject corresponding to file to read from | |
cffb2faf | 549 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
550 | * @buf: buffer containing value to be written |
551 | * @off: offset into legacy I/O port space | |
552 | * @count: number of bytes to write | |
553 | * | |
554 | * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
555 | * callback routine (pci_legacy_write). | |
556 | */ | |
f19aeb1f | 557 | static ssize_t |
91a69029 ZR |
558 | pci_write_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr, |
559 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
560 | { |
561 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 562 | struct device, |
1da177e4 LT |
563 | kobj)); |
564 | /* Only support 1, 2 or 4 byte accesses */ | |
565 | if (count != 1 && count != 2 && count != 4) | |
566 | return -EINVAL; | |
567 | ||
568 | return pci_legacy_write(bus, off, *(u32 *)buf, count); | |
569 | } | |
570 | ||
571 | /** | |
572 | * pci_mmap_legacy_mem - map legacy PCI memory into user memory space | |
573 | * @kobj: kobject corresponding to device to be mapped | |
574 | * @attr: struct bin_attribute for this file | |
575 | * @vma: struct vm_area_struct passed to mmap | |
576 | * | |
f19aeb1f | 577 | * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap |
1da177e4 LT |
578 | * legacy memory space (first meg of bus space) into application virtual |
579 | * memory space. | |
580 | */ | |
f19aeb1f | 581 | static int |
1da177e4 LT |
582 | pci_mmap_legacy_mem(struct kobject *kobj, struct bin_attribute *attr, |
583 | struct vm_area_struct *vma) | |
584 | { | |
585 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 586 | struct device, |
1da177e4 LT |
587 | kobj)); |
588 | ||
f19aeb1f BH |
589 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem); |
590 | } | |
591 | ||
592 | /** | |
593 | * pci_mmap_legacy_io - map legacy PCI IO into user memory space | |
594 | * @kobj: kobject corresponding to device to be mapped | |
595 | * @attr: struct bin_attribute for this file | |
596 | * @vma: struct vm_area_struct passed to mmap | |
597 | * | |
598 | * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap | |
599 | * legacy IO space (first meg of bus space) into application virtual | |
600 | * memory space. Returns -ENOSYS if the operation isn't supported | |
601 | */ | |
602 | static int | |
603 | pci_mmap_legacy_io(struct kobject *kobj, struct bin_attribute *attr, | |
604 | struct vm_area_struct *vma) | |
605 | { | |
606 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
607 | struct device, | |
608 | kobj)); | |
609 | ||
610 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io); | |
611 | } | |
612 | ||
10a0ef39 IK |
613 | /** |
614 | * pci_adjust_legacy_attr - adjustment of legacy file attributes | |
615 | * @b: bus to create files under | |
616 | * @mmap_type: I/O port or memory | |
617 | * | |
618 | * Stub implementation. Can be overridden by arch if necessary. | |
619 | */ | |
620 | void __weak | |
621 | pci_adjust_legacy_attr(struct pci_bus *b, enum pci_mmap_state mmap_type) | |
622 | { | |
623 | return; | |
624 | } | |
625 | ||
f19aeb1f BH |
626 | /** |
627 | * pci_create_legacy_files - create legacy I/O port and memory files | |
628 | * @b: bus to create files under | |
629 | * | |
630 | * Some platforms allow access to legacy I/O port and ISA memory space on | |
631 | * a per-bus basis. This routine creates the files and ties them into | |
632 | * their associated read, write and mmap files from pci-sysfs.c | |
633 | * | |
634 | * On error unwind, but don't propogate the error to the caller | |
635 | * as it is ok to set up the PCI bus without these files. | |
636 | */ | |
637 | void pci_create_legacy_files(struct pci_bus *b) | |
638 | { | |
639 | int error; | |
640 | ||
641 | b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2, | |
642 | GFP_ATOMIC); | |
643 | if (!b->legacy_io) | |
644 | goto kzalloc_err; | |
645 | ||
62e877b8 | 646 | sysfs_bin_attr_init(b->legacy_io); |
f19aeb1f BH |
647 | b->legacy_io->attr.name = "legacy_io"; |
648 | b->legacy_io->size = 0xffff; | |
649 | b->legacy_io->attr.mode = S_IRUSR | S_IWUSR; | |
650 | b->legacy_io->read = pci_read_legacy_io; | |
651 | b->legacy_io->write = pci_write_legacy_io; | |
652 | b->legacy_io->mmap = pci_mmap_legacy_io; | |
10a0ef39 | 653 | pci_adjust_legacy_attr(b, pci_mmap_io); |
f19aeb1f BH |
654 | error = device_create_bin_file(&b->dev, b->legacy_io); |
655 | if (error) | |
656 | goto legacy_io_err; | |
657 | ||
658 | /* Allocated above after the legacy_io struct */ | |
659 | b->legacy_mem = b->legacy_io + 1; | |
6757eca3 | 660 | sysfs_bin_attr_init(b->legacy_mem); |
f19aeb1f BH |
661 | b->legacy_mem->attr.name = "legacy_mem"; |
662 | b->legacy_mem->size = 1024*1024; | |
663 | b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR; | |
664 | b->legacy_mem->mmap = pci_mmap_legacy_mem; | |
10a0ef39 | 665 | pci_adjust_legacy_attr(b, pci_mmap_mem); |
f19aeb1f BH |
666 | error = device_create_bin_file(&b->dev, b->legacy_mem); |
667 | if (error) | |
668 | goto legacy_mem_err; | |
669 | ||
670 | return; | |
671 | ||
672 | legacy_mem_err: | |
673 | device_remove_bin_file(&b->dev, b->legacy_io); | |
674 | legacy_io_err: | |
675 | kfree(b->legacy_io); | |
676 | b->legacy_io = NULL; | |
677 | kzalloc_err: | |
678 | printk(KERN_WARNING "pci: warning: could not create legacy I/O port " | |
679 | "and ISA memory resources to sysfs\n"); | |
680 | return; | |
681 | } | |
682 | ||
683 | void pci_remove_legacy_files(struct pci_bus *b) | |
684 | { | |
685 | if (b->legacy_io) { | |
686 | device_remove_bin_file(&b->dev, b->legacy_io); | |
687 | device_remove_bin_file(&b->dev, b->legacy_mem); | |
688 | kfree(b->legacy_io); /* both are allocated here */ | |
689 | } | |
1da177e4 LT |
690 | } |
691 | #endif /* HAVE_PCI_LEGACY */ | |
692 | ||
693 | #ifdef HAVE_PCI_MMAP | |
b5ff7df3 | 694 | |
9eff02e2 | 695 | int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma) |
b5ff7df3 LT |
696 | { |
697 | unsigned long nr, start, size; | |
698 | ||
699 | nr = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; | |
700 | start = vma->vm_pgoff; | |
88e7df0b | 701 | size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1; |
b5ff7df3 LT |
702 | if (start < size && size - start >= nr) |
703 | return 1; | |
704 | WARN(1, "process \"%s\" tried to map 0x%08lx-0x%08lx on %s BAR %d (size 0x%08lx)\n", | |
705 | current->comm, start, start+nr, pci_name(pdev), resno, size); | |
706 | return 0; | |
707 | } | |
708 | ||
1da177e4 LT |
709 | /** |
710 | * pci_mmap_resource - map a PCI resource into user memory space | |
711 | * @kobj: kobject for mapping | |
712 | * @attr: struct bin_attribute for the file being mapped | |
713 | * @vma: struct vm_area_struct passed into the mmap | |
45aec1ae | 714 | * @write_combine: 1 for write_combine mapping |
1da177e4 LT |
715 | * |
716 | * Use the regular PCI mapping routines to map a PCI resource into userspace. | |
1da177e4 LT |
717 | */ |
718 | static int | |
719 | pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr, | |
45aec1ae | 720 | struct vm_area_struct *vma, int write_combine) |
1da177e4 LT |
721 | { |
722 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, | |
723 | struct device, kobj)); | |
724 | struct resource *res = (struct resource *)attr->private; | |
725 | enum pci_mmap_state mmap_type; | |
e31dd6e4 | 726 | resource_size_t start, end; |
2311b1f2 | 727 | int i; |
1da177e4 | 728 | |
2311b1f2 ME |
729 | for (i = 0; i < PCI_ROM_RESOURCE; i++) |
730 | if (res == &pdev->resource[i]) | |
731 | break; | |
732 | if (i >= PCI_ROM_RESOURCE) | |
733 | return -ENODEV; | |
734 | ||
b5ff7df3 LT |
735 | if (!pci_mmap_fits(pdev, i, vma)) |
736 | return -EINVAL; | |
737 | ||
2311b1f2 ME |
738 | /* pci_mmap_page_range() expects the same kind of entry as coming |
739 | * from /proc/bus/pci/ which is a "user visible" value. If this is | |
740 | * different from the resource itself, arch will do necessary fixup. | |
741 | */ | |
742 | pci_resource_to_user(pdev, i, res, &start, &end); | |
743 | vma->vm_pgoff += start >> PAGE_SHIFT; | |
1da177e4 LT |
744 | mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io; |
745 | ||
e8de1481 AV |
746 | if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(start)) |
747 | return -EINVAL; | |
748 | ||
45aec1ae | 749 | return pci_mmap_page_range(pdev, vma, mmap_type, write_combine); |
750 | } | |
751 | ||
752 | static int | |
753 | pci_mmap_resource_uc(struct kobject *kobj, struct bin_attribute *attr, | |
754 | struct vm_area_struct *vma) | |
755 | { | |
756 | return pci_mmap_resource(kobj, attr, vma, 0); | |
757 | } | |
758 | ||
759 | static int | |
760 | pci_mmap_resource_wc(struct kobject *kobj, struct bin_attribute *attr, | |
761 | struct vm_area_struct *vma) | |
762 | { | |
763 | return pci_mmap_resource(kobj, attr, vma, 1); | |
1da177e4 LT |
764 | } |
765 | ||
b19441af GKH |
766 | /** |
767 | * pci_remove_resource_files - cleanup resource files | |
cffb2faf | 768 | * @pdev: dev to cleanup |
b19441af | 769 | * |
cffb2faf | 770 | * If we created resource files for @pdev, remove them from sysfs and |
b19441af GKH |
771 | * free their resources. |
772 | */ | |
773 | static void | |
774 | pci_remove_resource_files(struct pci_dev *pdev) | |
775 | { | |
776 | int i; | |
777 | ||
778 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
779 | struct bin_attribute *res_attr; | |
780 | ||
781 | res_attr = pdev->res_attr[i]; | |
782 | if (res_attr) { | |
783 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
784 | kfree(res_attr); | |
785 | } | |
45aec1ae | 786 | |
787 | res_attr = pdev->res_attr_wc[i]; | |
788 | if (res_attr) { | |
789 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
790 | kfree(res_attr); | |
791 | } | |
b19441af GKH |
792 | } |
793 | } | |
794 | ||
45aec1ae | 795 | static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine) |
796 | { | |
797 | /* allocate attribute structure, piggyback attribute name */ | |
798 | int name_len = write_combine ? 13 : 10; | |
799 | struct bin_attribute *res_attr; | |
800 | int retval; | |
801 | ||
802 | res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC); | |
803 | if (res_attr) { | |
804 | char *res_attr_name = (char *)(res_attr + 1); | |
805 | ||
a07e4156 | 806 | sysfs_bin_attr_init(res_attr); |
45aec1ae | 807 | if (write_combine) { |
808 | pdev->res_attr_wc[num] = res_attr; | |
809 | sprintf(res_attr_name, "resource%d_wc", num); | |
810 | res_attr->mmap = pci_mmap_resource_wc; | |
811 | } else { | |
812 | pdev->res_attr[num] = res_attr; | |
813 | sprintf(res_attr_name, "resource%d", num); | |
814 | res_attr->mmap = pci_mmap_resource_uc; | |
815 | } | |
816 | res_attr->attr.name = res_attr_name; | |
817 | res_attr->attr.mode = S_IRUSR | S_IWUSR; | |
818 | res_attr->size = pci_resource_len(pdev, num); | |
819 | res_attr->private = &pdev->resource[num]; | |
820 | retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr); | |
821 | } else | |
822 | retval = -ENOMEM; | |
823 | ||
824 | return retval; | |
825 | } | |
826 | ||
1da177e4 LT |
827 | /** |
828 | * pci_create_resource_files - create resource files in sysfs for @dev | |
cffb2faf | 829 | * @pdev: dev in question |
1da177e4 | 830 | * |
cffb2faf | 831 | * Walk the resources in @pdev creating files for each resource available. |
1da177e4 | 832 | */ |
b19441af | 833 | static int pci_create_resource_files(struct pci_dev *pdev) |
1da177e4 LT |
834 | { |
835 | int i; | |
b19441af | 836 | int retval; |
1da177e4 LT |
837 | |
838 | /* Expose the PCI resources from this device as files */ | |
839 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
1da177e4 LT |
840 | |
841 | /* skip empty resources */ | |
842 | if (!pci_resource_len(pdev, i)) | |
843 | continue; | |
844 | ||
45aec1ae | 845 | retval = pci_create_attr(pdev, i, 0); |
846 | /* for prefetchable resources, create a WC mappable file */ | |
847 | if (!retval && pdev->resource[i].flags & IORESOURCE_PREFETCH) | |
848 | retval = pci_create_attr(pdev, i, 1); | |
849 | ||
850 | if (retval) { | |
851 | pci_remove_resource_files(pdev); | |
852 | return retval; | |
1da177e4 LT |
853 | } |
854 | } | |
b19441af | 855 | return 0; |
1da177e4 LT |
856 | } |
857 | #else /* !HAVE_PCI_MMAP */ | |
10a0ef39 IK |
858 | int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; } |
859 | void __weak pci_remove_resource_files(struct pci_dev *dev) { return; } | |
1da177e4 LT |
860 | #endif /* HAVE_PCI_MMAP */ |
861 | ||
862 | /** | |
863 | * pci_write_rom - used to enable access to the PCI ROM display | |
864 | * @kobj: kernel object handle | |
cffb2faf | 865 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
866 | * @buf: user input |
867 | * @off: file offset | |
868 | * @count: number of byte in input | |
869 | * | |
870 | * writing anything except 0 enables it | |
871 | */ | |
872 | static ssize_t | |
91a69029 ZR |
873 | pci_write_rom(struct kobject *kobj, struct bin_attribute *bin_attr, |
874 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
875 | { |
876 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj)); | |
877 | ||
878 | if ((off == 0) && (*buf == '0') && (count == 2)) | |
879 | pdev->rom_attr_enabled = 0; | |
880 | else | |
881 | pdev->rom_attr_enabled = 1; | |
882 | ||
883 | return count; | |
884 | } | |
885 | ||
886 | /** | |
887 | * pci_read_rom - read a PCI ROM | |
888 | * @kobj: kernel object handle | |
cffb2faf | 889 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
890 | * @buf: where to put the data we read from the ROM |
891 | * @off: file offset | |
892 | * @count: number of bytes to read | |
893 | * | |
894 | * Put @count bytes starting at @off into @buf from the ROM in the PCI | |
895 | * device corresponding to @kobj. | |
896 | */ | |
897 | static ssize_t | |
91a69029 ZR |
898 | pci_read_rom(struct kobject *kobj, struct bin_attribute *bin_attr, |
899 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
900 | { |
901 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj)); | |
902 | void __iomem *rom; | |
903 | size_t size; | |
904 | ||
905 | if (!pdev->rom_attr_enabled) | |
906 | return -EINVAL; | |
907 | ||
908 | rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */ | |
97c44836 TN |
909 | if (!rom || !size) |
910 | return -EIO; | |
1da177e4 LT |
911 | |
912 | if (off >= size) | |
913 | count = 0; | |
914 | else { | |
915 | if (off + count > size) | |
916 | count = size - off; | |
917 | ||
918 | memcpy_fromio(buf, rom + off, count); | |
919 | } | |
920 | pci_unmap_rom(pdev, rom); | |
921 | ||
922 | return count; | |
923 | } | |
924 | ||
925 | static struct bin_attribute pci_config_attr = { | |
926 | .attr = { | |
927 | .name = "config", | |
928 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 929 | }, |
557848c3 | 930 | .size = PCI_CFG_SPACE_SIZE, |
1da177e4 LT |
931 | .read = pci_read_config, |
932 | .write = pci_write_config, | |
933 | }; | |
934 | ||
935 | static struct bin_attribute pcie_config_attr = { | |
936 | .attr = { | |
937 | .name = "config", | |
938 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 939 | }, |
557848c3 | 940 | .size = PCI_CFG_SPACE_EXP_SIZE, |
1da177e4 LT |
941 | .read = pci_read_config, |
942 | .write = pci_write_config, | |
943 | }; | |
944 | ||
a2cd52ca | 945 | int __attribute__ ((weak)) pcibios_add_platform_entries(struct pci_dev *dev) |
575e3348 | 946 | { |
a2cd52ca | 947 | return 0; |
575e3348 ME |
948 | } |
949 | ||
711d5779 MT |
950 | static ssize_t reset_store(struct device *dev, |
951 | struct device_attribute *attr, const char *buf, | |
952 | size_t count) | |
953 | { | |
954 | struct pci_dev *pdev = to_pci_dev(dev); | |
955 | unsigned long val; | |
956 | ssize_t result = strict_strtoul(buf, 0, &val); | |
957 | ||
958 | if (result < 0) | |
959 | return result; | |
960 | ||
961 | if (val != 1) | |
962 | return -EINVAL; | |
963 | return pci_reset_function(pdev); | |
964 | } | |
965 | ||
966 | static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store); | |
967 | ||
280c73d3 ZY |
968 | static int pci_create_capabilities_sysfs(struct pci_dev *dev) |
969 | { | |
970 | int retval; | |
971 | struct bin_attribute *attr; | |
972 | ||
973 | /* If the device has VPD, try to expose it in sysfs. */ | |
974 | if (dev->vpd) { | |
975 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); | |
976 | if (!attr) | |
977 | return -ENOMEM; | |
978 | ||
a07e4156 | 979 | sysfs_bin_attr_init(attr); |
280c73d3 ZY |
980 | attr->size = dev->vpd->len; |
981 | attr->attr.name = "vpd"; | |
982 | attr->attr.mode = S_IRUSR | S_IWUSR; | |
287d19ce SH |
983 | attr->read = read_vpd_attr; |
984 | attr->write = write_vpd_attr; | |
280c73d3 ZY |
985 | retval = sysfs_create_bin_file(&dev->dev.kobj, attr); |
986 | if (retval) { | |
987 | kfree(dev->vpd->attr); | |
988 | return retval; | |
989 | } | |
990 | dev->vpd->attr = attr; | |
991 | } | |
992 | ||
993 | /* Active State Power Management */ | |
994 | pcie_aspm_create_sysfs_dev_files(dev); | |
995 | ||
711d5779 MT |
996 | if (!pci_probe_reset_function(dev)) { |
997 | retval = device_create_file(&dev->dev, &reset_attr); | |
998 | if (retval) | |
999 | goto error; | |
1000 | dev->reset_fn = 1; | |
1001 | } | |
280c73d3 | 1002 | return 0; |
711d5779 MT |
1003 | |
1004 | error: | |
1005 | pcie_aspm_remove_sysfs_dev_files(dev); | |
1006 | if (dev->vpd && dev->vpd->attr) { | |
1007 | sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr); | |
1008 | kfree(dev->vpd->attr); | |
1009 | } | |
1010 | ||
1011 | return retval; | |
280c73d3 ZY |
1012 | } |
1013 | ||
b19441af | 1014 | int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev) |
1da177e4 | 1015 | { |
b19441af | 1016 | int retval; |
280c73d3 ZY |
1017 | int rom_size = 0; |
1018 | struct bin_attribute *attr; | |
b19441af | 1019 | |
1da177e4 LT |
1020 | if (!sysfs_initialized) |
1021 | return -EACCES; | |
1022 | ||
557848c3 | 1023 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
b19441af | 1024 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1da177e4 | 1025 | else |
b19441af GKH |
1026 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
1027 | if (retval) | |
1028 | goto err; | |
1da177e4 | 1029 | |
b19441af GKH |
1030 | retval = pci_create_resource_files(pdev); |
1031 | if (retval) | |
280c73d3 ZY |
1032 | goto err_config_file; |
1033 | ||
1034 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) | |
1035 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); | |
1036 | else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW) | |
1037 | rom_size = 0x20000; | |
1da177e4 LT |
1038 | |
1039 | /* If the device has a ROM, try to expose it in sysfs. */ | |
280c73d3 | 1040 | if (rom_size) { |
94e61088 | 1041 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); |
280c73d3 | 1042 | if (!attr) { |
b19441af | 1043 | retval = -ENOMEM; |
9890b12a | 1044 | goto err_resource_files; |
1da177e4 | 1045 | } |
a07e4156 | 1046 | sysfs_bin_attr_init(attr); |
280c73d3 ZY |
1047 | attr->size = rom_size; |
1048 | attr->attr.name = "rom"; | |
1049 | attr->attr.mode = S_IRUSR; | |
1050 | attr->read = pci_read_rom; | |
1051 | attr->write = pci_write_rom; | |
1052 | retval = sysfs_create_bin_file(&pdev->dev.kobj, attr); | |
1053 | if (retval) { | |
1054 | kfree(attr); | |
1055 | goto err_resource_files; | |
1056 | } | |
1057 | pdev->rom_attr = attr; | |
1da177e4 | 1058 | } |
280c73d3 | 1059 | |
217f45de DA |
1060 | if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) { |
1061 | retval = device_create_file(&pdev->dev, &vga_attr); | |
1062 | if (retval) | |
1063 | goto err_rom_file; | |
1064 | } | |
1065 | ||
1da177e4 | 1066 | /* add platform-specific attributes */ |
280c73d3 ZY |
1067 | retval = pcibios_add_platform_entries(pdev); |
1068 | if (retval) | |
217f45de | 1069 | goto err_vga_file; |
b19441af | 1070 | |
280c73d3 ZY |
1071 | /* add sysfs entries for various capabilities */ |
1072 | retval = pci_create_capabilities_sysfs(pdev); | |
1073 | if (retval) | |
217f45de | 1074 | goto err_vga_file; |
7d715a6c | 1075 | |
1da177e4 | 1076 | return 0; |
b19441af | 1077 | |
217f45de DA |
1078 | err_vga_file: |
1079 | if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) | |
1080 | device_remove_file(&pdev->dev, &vga_attr); | |
a2cd52ca | 1081 | err_rom_file: |
280c73d3 | 1082 | if (rom_size) { |
94e61088 | 1083 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); |
280c73d3 ZY |
1084 | kfree(pdev->rom_attr); |
1085 | pdev->rom_attr = NULL; | |
1086 | } | |
9890b12a ME |
1087 | err_resource_files: |
1088 | pci_remove_resource_files(pdev); | |
94e61088 | 1089 | err_config_file: |
557848c3 | 1090 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
b19441af GKH |
1091 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1092 | else | |
1093 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); | |
1094 | err: | |
1095 | return retval; | |
1da177e4 LT |
1096 | } |
1097 | ||
280c73d3 ZY |
1098 | static void pci_remove_capabilities_sysfs(struct pci_dev *dev) |
1099 | { | |
1100 | if (dev->vpd && dev->vpd->attr) { | |
1101 | sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr); | |
1102 | kfree(dev->vpd->attr); | |
1103 | } | |
1104 | ||
1105 | pcie_aspm_remove_sysfs_dev_files(dev); | |
711d5779 MT |
1106 | if (dev->reset_fn) { |
1107 | device_remove_file(&dev->dev, &reset_attr); | |
1108 | dev->reset_fn = 0; | |
1109 | } | |
280c73d3 ZY |
1110 | } |
1111 | ||
1da177e4 LT |
1112 | /** |
1113 | * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files | |
1114 | * @pdev: device whose entries we should free | |
1115 | * | |
1116 | * Cleanup when @pdev is removed from sysfs. | |
1117 | */ | |
1118 | void pci_remove_sysfs_dev_files(struct pci_dev *pdev) | |
1119 | { | |
280c73d3 ZY |
1120 | int rom_size = 0; |
1121 | ||
d67afe5e DM |
1122 | if (!sysfs_initialized) |
1123 | return; | |
1124 | ||
280c73d3 | 1125 | pci_remove_capabilities_sysfs(pdev); |
7d715a6c | 1126 | |
557848c3 | 1127 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
1da177e4 LT |
1128 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1129 | else | |
1130 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); | |
1131 | ||
1132 | pci_remove_resource_files(pdev); | |
1133 | ||
280c73d3 ZY |
1134 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) |
1135 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); | |
1136 | else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW) | |
1137 | rom_size = 0x20000; | |
1138 | ||
1139 | if (rom_size && pdev->rom_attr) { | |
1140 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); | |
1141 | kfree(pdev->rom_attr); | |
1da177e4 LT |
1142 | } |
1143 | } | |
1144 | ||
1145 | static int __init pci_sysfs_init(void) | |
1146 | { | |
1147 | struct pci_dev *pdev = NULL; | |
b19441af GKH |
1148 | int retval; |
1149 | ||
1da177e4 | 1150 | sysfs_initialized = 1; |
b19441af GKH |
1151 | for_each_pci_dev(pdev) { |
1152 | retval = pci_create_sysfs_dev_files(pdev); | |
151fc5df JL |
1153 | if (retval) { |
1154 | pci_dev_put(pdev); | |
b19441af | 1155 | return retval; |
151fc5df | 1156 | } |
b19441af | 1157 | } |
1da177e4 LT |
1158 | |
1159 | return 0; | |
1160 | } | |
1161 | ||
40ee9e9f | 1162 | late_initcall(pci_sysfs_init); |