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> | |
de139a33 | 24 | #include <linux/fs.h> |
aa0ac365 | 25 | #include <linux/capability.h> |
7d715a6c | 26 | #include <linux/pci-aspm.h> |
5a0e3ad6 | 27 | #include <linux/slab.h> |
1da177e4 LT |
28 | #include "pci.h" |
29 | ||
30 | static int sysfs_initialized; /* = 0 */ | |
31 | ||
32 | /* show configuration fields */ | |
33 | #define pci_config_attr(field, format_string) \ | |
34 | static ssize_t \ | |
e404e274 | 35 | field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
36 | { \ |
37 | struct pci_dev *pdev; \ | |
38 | \ | |
39 | pdev = to_pci_dev (dev); \ | |
40 | return sprintf (buf, format_string, pdev->field); \ | |
41 | } | |
42 | ||
43 | pci_config_attr(vendor, "0x%04x\n"); | |
44 | pci_config_attr(device, "0x%04x\n"); | |
45 | pci_config_attr(subsystem_vendor, "0x%04x\n"); | |
46 | pci_config_attr(subsystem_device, "0x%04x\n"); | |
47 | pci_config_attr(class, "0x%06x\n"); | |
48 | pci_config_attr(irq, "%u\n"); | |
49 | ||
bdee9d98 DT |
50 | static ssize_t broken_parity_status_show(struct device *dev, |
51 | struct device_attribute *attr, | |
52 | char *buf) | |
53 | { | |
54 | struct pci_dev *pdev = to_pci_dev(dev); | |
55 | return sprintf (buf, "%u\n", pdev->broken_parity_status); | |
56 | } | |
57 | ||
58 | static ssize_t broken_parity_status_store(struct device *dev, | |
59 | struct device_attribute *attr, | |
60 | const char *buf, size_t count) | |
61 | { | |
62 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 | 63 | unsigned long val; |
bdee9d98 | 64 | |
92425a40 TP |
65 | if (strict_strtoul(buf, 0, &val) < 0) |
66 | return -EINVAL; | |
67 | ||
68 | pdev->broken_parity_status = !!val; | |
69 | ||
70 | return count; | |
bdee9d98 DT |
71 | } |
72 | ||
4327edf6 AC |
73 | static ssize_t local_cpus_show(struct device *dev, |
74 | struct device_attribute *attr, char *buf) | |
1da177e4 | 75 | { |
3be83050 | 76 | const struct cpumask *mask; |
4327edf6 AC |
77 | int len; |
78 | ||
e0cd5160 | 79 | #ifdef CONFIG_NUMA |
6be954d1 DJ |
80 | mask = (dev_to_node(dev) == -1) ? cpu_online_mask : |
81 | cpumask_of_node(dev_to_node(dev)); | |
e0cd5160 | 82 | #else |
3be83050 | 83 | mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); |
e0cd5160 | 84 | #endif |
3be83050 | 85 | len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask); |
39106dcf MT |
86 | buf[len++] = '\n'; |
87 | buf[len] = '\0'; | |
88 | return len; | |
89 | } | |
90 | ||
91 | ||
92 | static ssize_t local_cpulist_show(struct device *dev, | |
93 | struct device_attribute *attr, char *buf) | |
94 | { | |
3be83050 | 95 | const struct cpumask *mask; |
39106dcf MT |
96 | int len; |
97 | ||
e0cd5160 | 98 | #ifdef CONFIG_NUMA |
6be954d1 DJ |
99 | mask = (dev_to_node(dev) == -1) ? cpu_online_mask : |
100 | cpumask_of_node(dev_to_node(dev)); | |
e0cd5160 | 101 | #else |
3be83050 | 102 | mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); |
e0cd5160 | 103 | #endif |
3be83050 | 104 | len = cpulist_scnprintf(buf, PAGE_SIZE-2, mask); |
39106dcf MT |
105 | buf[len++] = '\n'; |
106 | buf[len] = '\0'; | |
107 | return len; | |
1da177e4 LT |
108 | } |
109 | ||
110 | /* show resources */ | |
111 | static ssize_t | |
e404e274 | 112 | resource_show(struct device * dev, struct device_attribute *attr, char * buf) |
1da177e4 LT |
113 | { |
114 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
115 | char * str = buf; | |
116 | int i; | |
fde09c6d | 117 | int max; |
e31dd6e4 | 118 | resource_size_t start, end; |
1da177e4 LT |
119 | |
120 | if (pci_dev->subordinate) | |
121 | max = DEVICE_COUNT_RESOURCE; | |
fde09c6d YZ |
122 | else |
123 | max = PCI_BRIDGE_RESOURCES; | |
1da177e4 LT |
124 | |
125 | for (i = 0; i < max; i++) { | |
2311b1f2 ME |
126 | struct resource *res = &pci_dev->resource[i]; |
127 | pci_resource_to_user(pci_dev, i, res, &start, &end); | |
128 | str += sprintf(str,"0x%016llx 0x%016llx 0x%016llx\n", | |
129 | (unsigned long long)start, | |
130 | (unsigned long long)end, | |
131 | (unsigned long long)res->flags); | |
1da177e4 LT |
132 | } |
133 | return (str - buf); | |
134 | } | |
135 | ||
87c8a443 | 136 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) |
9888549e GK |
137 | { |
138 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
139 | ||
140 | return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n", | |
141 | pci_dev->vendor, pci_dev->device, | |
142 | pci_dev->subsystem_vendor, pci_dev->subsystem_device, | |
143 | (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8), | |
144 | (u8)(pci_dev->class)); | |
145 | } | |
bae94d02 IPG |
146 | |
147 | static ssize_t is_enabled_store(struct device *dev, | |
148 | struct device_attribute *attr, const char *buf, | |
149 | size_t count) | |
9f125d30 AV |
150 | { |
151 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 TP |
152 | unsigned long val; |
153 | ssize_t result = strict_strtoul(buf, 0, &val); | |
154 | ||
155 | if (result < 0) | |
156 | return result; | |
9f125d30 AV |
157 | |
158 | /* this can crash the machine when done on the "wrong" device */ | |
159 | if (!capable(CAP_SYS_ADMIN)) | |
92425a40 | 160 | return -EPERM; |
9f125d30 | 161 | |
92425a40 | 162 | if (!val) { |
296ccb08 | 163 | if (pci_is_enabled(pdev)) |
bae94d02 IPG |
164 | pci_disable_device(pdev); |
165 | else | |
166 | result = -EIO; | |
92425a40 | 167 | } else |
bae94d02 | 168 | result = pci_enable_device(pdev); |
9f125d30 | 169 | |
bae94d02 IPG |
170 | return result < 0 ? result : count; |
171 | } | |
172 | ||
173 | static ssize_t is_enabled_show(struct device *dev, | |
174 | struct device_attribute *attr, char *buf) | |
175 | { | |
176 | struct pci_dev *pdev; | |
9f125d30 | 177 | |
bae94d02 IPG |
178 | pdev = to_pci_dev (dev); |
179 | return sprintf (buf, "%u\n", atomic_read(&pdev->enable_cnt)); | |
9f125d30 AV |
180 | } |
181 | ||
81bb0e19 BG |
182 | #ifdef CONFIG_NUMA |
183 | static ssize_t | |
184 | numa_node_show(struct device *dev, struct device_attribute *attr, char *buf) | |
185 | { | |
186 | return sprintf (buf, "%d\n", dev->numa_node); | |
187 | } | |
188 | #endif | |
189 | ||
bb965401 YL |
190 | static ssize_t |
191 | dma_mask_bits_show(struct device *dev, struct device_attribute *attr, char *buf) | |
192 | { | |
193 | struct pci_dev *pdev = to_pci_dev(dev); | |
194 | ||
195 | return sprintf (buf, "%d\n", fls64(pdev->dma_mask)); | |
196 | } | |
197 | ||
198 | static ssize_t | |
199 | consistent_dma_mask_bits_show(struct device *dev, struct device_attribute *attr, | |
200 | char *buf) | |
201 | { | |
202 | return sprintf (buf, "%d\n", fls64(dev->coherent_dma_mask)); | |
203 | } | |
204 | ||
fe97064c BG |
205 | static ssize_t |
206 | msi_bus_show(struct device *dev, struct device_attribute *attr, char *buf) | |
207 | { | |
208 | struct pci_dev *pdev = to_pci_dev(dev); | |
209 | ||
210 | if (!pdev->subordinate) | |
211 | return 0; | |
212 | ||
213 | return sprintf (buf, "%u\n", | |
214 | !(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI)); | |
215 | } | |
216 | ||
217 | static ssize_t | |
218 | msi_bus_store(struct device *dev, struct device_attribute *attr, | |
219 | const char *buf, size_t count) | |
220 | { | |
221 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 TP |
222 | unsigned long val; |
223 | ||
224 | if (strict_strtoul(buf, 0, &val) < 0) | |
225 | return -EINVAL; | |
fe97064c BG |
226 | |
227 | /* bad things may happen if the no_msi flag is changed | |
228 | * while some drivers are loaded */ | |
229 | if (!capable(CAP_SYS_ADMIN)) | |
92425a40 | 230 | return -EPERM; |
fe97064c | 231 | |
92425a40 TP |
232 | /* Maybe pci devices without subordinate busses shouldn't even have this |
233 | * attribute in the first place? */ | |
fe97064c BG |
234 | if (!pdev->subordinate) |
235 | return count; | |
236 | ||
92425a40 TP |
237 | /* Is the flag going to change, or keep the value it already had? */ |
238 | if (!(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) ^ | |
239 | !!val) { | |
240 | pdev->subordinate->bus_flags ^= PCI_BUS_FLAGS_NO_MSI; | |
fe97064c | 241 | |
92425a40 TP |
242 | dev_warn(&pdev->dev, "forced subordinate bus to%s support MSI," |
243 | " bad things could happen\n", val ? "" : " not"); | |
fe97064c BG |
244 | } |
245 | ||
246 | return count; | |
247 | } | |
9888549e | 248 | |
705b1aaa AC |
249 | #ifdef CONFIG_HOTPLUG |
250 | static DEFINE_MUTEX(pci_remove_rescan_mutex); | |
251 | static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf, | |
252 | size_t count) | |
253 | { | |
254 | unsigned long val; | |
255 | struct pci_bus *b = NULL; | |
256 | ||
257 | if (strict_strtoul(buf, 0, &val) < 0) | |
258 | return -EINVAL; | |
259 | ||
260 | if (val) { | |
261 | mutex_lock(&pci_remove_rescan_mutex); | |
262 | while ((b = pci_find_next_bus(b)) != NULL) | |
263 | pci_rescan_bus(b); | |
264 | mutex_unlock(&pci_remove_rescan_mutex); | |
265 | } | |
266 | return count; | |
267 | } | |
268 | ||
269 | struct bus_attribute pci_bus_attrs[] = { | |
270 | __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store), | |
271 | __ATTR_NULL | |
272 | }; | |
77c27c7b | 273 | |
738a6396 AC |
274 | static ssize_t |
275 | dev_rescan_store(struct device *dev, struct device_attribute *attr, | |
276 | const char *buf, size_t count) | |
277 | { | |
278 | unsigned long val; | |
279 | struct pci_dev *pdev = to_pci_dev(dev); | |
280 | ||
281 | if (strict_strtoul(buf, 0, &val) < 0) | |
282 | return -EINVAL; | |
283 | ||
284 | if (val) { | |
285 | mutex_lock(&pci_remove_rescan_mutex); | |
286 | pci_rescan_bus(pdev->bus); | |
287 | mutex_unlock(&pci_remove_rescan_mutex); | |
288 | } | |
289 | return count; | |
290 | } | |
291 | ||
77c27c7b AC |
292 | static void remove_callback(struct device *dev) |
293 | { | |
294 | struct pci_dev *pdev = to_pci_dev(dev); | |
295 | ||
296 | mutex_lock(&pci_remove_rescan_mutex); | |
297 | pci_remove_bus_device(pdev); | |
298 | mutex_unlock(&pci_remove_rescan_mutex); | |
299 | } | |
300 | ||
301 | static ssize_t | |
302 | remove_store(struct device *dev, struct device_attribute *dummy, | |
303 | const char *buf, size_t count) | |
304 | { | |
305 | int ret = 0; | |
306 | unsigned long val; | |
77c27c7b AC |
307 | |
308 | if (strict_strtoul(buf, 0, &val) < 0) | |
309 | return -EINVAL; | |
310 | ||
77c27c7b AC |
311 | /* An attribute cannot be unregistered by one of its own methods, |
312 | * so we have to use this roundabout approach. | |
313 | */ | |
314 | if (val) | |
315 | ret = device_schedule_callback(dev, remove_callback); | |
316 | if (ret) | |
317 | count = ret; | |
318 | return count; | |
319 | } | |
705b1aaa AC |
320 | #endif |
321 | ||
1da177e4 LT |
322 | struct device_attribute pci_dev_attrs[] = { |
323 | __ATTR_RO(resource), | |
324 | __ATTR_RO(vendor), | |
325 | __ATTR_RO(device), | |
326 | __ATTR_RO(subsystem_vendor), | |
327 | __ATTR_RO(subsystem_device), | |
328 | __ATTR_RO(class), | |
329 | __ATTR_RO(irq), | |
330 | __ATTR_RO(local_cpus), | |
39106dcf | 331 | __ATTR_RO(local_cpulist), |
9888549e | 332 | __ATTR_RO(modalias), |
81bb0e19 BG |
333 | #ifdef CONFIG_NUMA |
334 | __ATTR_RO(numa_node), | |
335 | #endif | |
bb965401 YL |
336 | __ATTR_RO(dma_mask_bits), |
337 | __ATTR_RO(consistent_dma_mask_bits), | |
9f125d30 | 338 | __ATTR(enable, 0600, is_enabled_show, is_enabled_store), |
bdee9d98 DT |
339 | __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR), |
340 | broken_parity_status_show,broken_parity_status_store), | |
fe97064c | 341 | __ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store), |
77c27c7b AC |
342 | #ifdef CONFIG_HOTPLUG |
343 | __ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store), | |
738a6396 | 344 | __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store), |
77c27c7b | 345 | #endif |
1da177e4 LT |
346 | __ATTR_NULL, |
347 | }; | |
348 | ||
217f45de DA |
349 | static ssize_t |
350 | boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf) | |
351 | { | |
352 | struct pci_dev *pdev = to_pci_dev(dev); | |
353 | ||
354 | return sprintf(buf, "%u\n", | |
355 | !!(pdev->resource[PCI_ROM_RESOURCE].flags & | |
356 | IORESOURCE_ROM_SHADOW)); | |
357 | } | |
358 | struct device_attribute vga_attr = __ATTR_RO(boot_vga); | |
359 | ||
1da177e4 | 360 | static ssize_t |
2c3c8bea CW |
361 | pci_read_config(struct file *filp, struct kobject *kobj, |
362 | struct bin_attribute *bin_attr, | |
91a69029 | 363 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
364 | { |
365 | struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); | |
366 | unsigned int size = 64; | |
367 | loff_t init_off = off; | |
4c0619ad | 368 | u8 *data = (u8*) buf; |
1da177e4 LT |
369 | |
370 | /* Several chips lock up trying to read undefined config space */ | |
de139a33 | 371 | if (cap_raised(filp->f_cred->cap_effective, CAP_SYS_ADMIN)) { |
1da177e4 LT |
372 | size = dev->cfg_size; |
373 | } else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { | |
374 | size = 128; | |
375 | } | |
376 | ||
377 | if (off > size) | |
378 | return 0; | |
379 | if (off + count > size) { | |
380 | size -= off; | |
381 | count = size; | |
382 | } else { | |
383 | size = count; | |
384 | } | |
385 | ||
4c0619ad | 386 | if ((off & 1) && size) { |
387 | u8 val; | |
e04b0ea2 | 388 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 389 | data[off - init_off] = val; |
1da177e4 | 390 | off++; |
4c0619ad | 391 | size--; |
392 | } | |
393 | ||
394 | if ((off & 3) && size > 2) { | |
395 | u16 val; | |
e04b0ea2 | 396 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 397 | data[off - init_off] = val & 0xff; |
398 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
399 | off += 2; | |
400 | size -= 2; | |
1da177e4 LT |
401 | } |
402 | ||
403 | while (size > 3) { | |
4c0619ad | 404 | u32 val; |
e04b0ea2 | 405 | pci_user_read_config_dword(dev, off, &val); |
4c0619ad | 406 | data[off - init_off] = val & 0xff; |
407 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
408 | data[off - init_off + 2] = (val >> 16) & 0xff; | |
409 | data[off - init_off + 3] = (val >> 24) & 0xff; | |
1da177e4 LT |
410 | off += 4; |
411 | size -= 4; | |
412 | } | |
413 | ||
4c0619ad | 414 | if (size >= 2) { |
415 | u16 val; | |
e04b0ea2 | 416 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 417 | data[off - init_off] = val & 0xff; |
418 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
419 | off += 2; | |
420 | size -= 2; | |
421 | } | |
422 | ||
423 | if (size > 0) { | |
424 | u8 val; | |
e04b0ea2 | 425 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 426 | data[off - init_off] = val; |
1da177e4 LT |
427 | off++; |
428 | --size; | |
429 | } | |
430 | ||
431 | return count; | |
432 | } | |
433 | ||
434 | static ssize_t | |
2c3c8bea CW |
435 | pci_write_config(struct file* filp, struct kobject *kobj, |
436 | struct bin_attribute *bin_attr, | |
91a69029 | 437 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
438 | { |
439 | struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); | |
440 | unsigned int size = count; | |
441 | loff_t init_off = off; | |
4c0619ad | 442 | u8 *data = (u8*) buf; |
1da177e4 LT |
443 | |
444 | if (off > dev->cfg_size) | |
445 | return 0; | |
446 | if (off + count > dev->cfg_size) { | |
447 | size = dev->cfg_size - off; | |
448 | count = size; | |
449 | } | |
4c0619ad | 450 | |
451 | if ((off & 1) && size) { | |
e04b0ea2 | 452 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 | 453 | off++; |
4c0619ad | 454 | size--; |
1da177e4 | 455 | } |
4c0619ad | 456 | |
457 | if ((off & 3) && size > 2) { | |
458 | u16 val = data[off - init_off]; | |
459 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 460 | pci_user_write_config_word(dev, off, val); |
4c0619ad | 461 | off += 2; |
462 | size -= 2; | |
463 | } | |
1da177e4 LT |
464 | |
465 | while (size > 3) { | |
4c0619ad | 466 | u32 val = data[off - init_off]; |
467 | val |= (u32) data[off - init_off + 1] << 8; | |
468 | val |= (u32) data[off - init_off + 2] << 16; | |
469 | val |= (u32) data[off - init_off + 3] << 24; | |
e04b0ea2 | 470 | pci_user_write_config_dword(dev, off, val); |
1da177e4 LT |
471 | off += 4; |
472 | size -= 4; | |
473 | } | |
4c0619ad | 474 | |
475 | if (size >= 2) { | |
476 | u16 val = data[off - init_off]; | |
477 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 478 | pci_user_write_config_word(dev, off, val); |
4c0619ad | 479 | off += 2; |
480 | size -= 2; | |
481 | } | |
1da177e4 | 482 | |
4c0619ad | 483 | if (size) { |
e04b0ea2 | 484 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 LT |
485 | off++; |
486 | --size; | |
487 | } | |
488 | ||
489 | return count; | |
490 | } | |
491 | ||
94e61088 | 492 | static ssize_t |
2c3c8bea CW |
493 | read_vpd_attr(struct file *filp, struct kobject *kobj, |
494 | struct bin_attribute *bin_attr, | |
287d19ce | 495 | char *buf, loff_t off, size_t count) |
94e61088 BH |
496 | { |
497 | struct pci_dev *dev = | |
498 | to_pci_dev(container_of(kobj, struct device, kobj)); | |
94e61088 BH |
499 | |
500 | if (off > bin_attr->size) | |
501 | count = 0; | |
502 | else if (count > bin_attr->size - off) | |
503 | count = bin_attr->size - off; | |
94e61088 | 504 | |
287d19ce | 505 | return pci_read_vpd(dev, off, count, buf); |
94e61088 BH |
506 | } |
507 | ||
508 | static ssize_t | |
2c3c8bea CW |
509 | write_vpd_attr(struct file *filp, struct kobject *kobj, |
510 | struct bin_attribute *bin_attr, | |
287d19ce | 511 | char *buf, loff_t off, size_t count) |
94e61088 BH |
512 | { |
513 | struct pci_dev *dev = | |
514 | to_pci_dev(container_of(kobj, struct device, kobj)); | |
94e61088 BH |
515 | |
516 | if (off > bin_attr->size) | |
517 | count = 0; | |
518 | else if (count > bin_attr->size - off) | |
519 | count = bin_attr->size - off; | |
94e61088 | 520 | |
287d19ce | 521 | return pci_write_vpd(dev, off, count, buf); |
94e61088 BH |
522 | } |
523 | ||
1da177e4 LT |
524 | #ifdef HAVE_PCI_LEGACY |
525 | /** | |
526 | * pci_read_legacy_io - read byte(s) from legacy I/O port space | |
2c3c8bea | 527 | * @filp: open sysfs file |
1da177e4 | 528 | * @kobj: kobject corresponding to file to read from |
cffb2faf | 529 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
530 | * @buf: buffer to store results |
531 | * @off: offset into legacy I/O port space | |
532 | * @count: number of bytes to read | |
533 | * | |
534 | * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
535 | * callback routine (pci_legacy_read). | |
536 | */ | |
f19aeb1f | 537 | static ssize_t |
2c3c8bea CW |
538 | pci_read_legacy_io(struct file *filp, struct kobject *kobj, |
539 | struct bin_attribute *bin_attr, | |
91a69029 | 540 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
541 | { |
542 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 543 | struct device, |
1da177e4 LT |
544 | kobj)); |
545 | ||
546 | /* Only support 1, 2 or 4 byte accesses */ | |
547 | if (count != 1 && count != 2 && count != 4) | |
548 | return -EINVAL; | |
549 | ||
550 | return pci_legacy_read(bus, off, (u32 *)buf, count); | |
551 | } | |
552 | ||
553 | /** | |
554 | * pci_write_legacy_io - write byte(s) to legacy I/O port space | |
2c3c8bea | 555 | * @filp: open sysfs file |
1da177e4 | 556 | * @kobj: kobject corresponding to file to read from |
cffb2faf | 557 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
558 | * @buf: buffer containing value to be written |
559 | * @off: offset into legacy I/O port space | |
560 | * @count: number of bytes to write | |
561 | * | |
562 | * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
563 | * callback routine (pci_legacy_write). | |
564 | */ | |
f19aeb1f | 565 | static ssize_t |
2c3c8bea CW |
566 | pci_write_legacy_io(struct file *filp, struct kobject *kobj, |
567 | struct bin_attribute *bin_attr, | |
91a69029 | 568 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
569 | { |
570 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 571 | struct device, |
1da177e4 LT |
572 | kobj)); |
573 | /* Only support 1, 2 or 4 byte accesses */ | |
574 | if (count != 1 && count != 2 && count != 4) | |
575 | return -EINVAL; | |
576 | ||
577 | return pci_legacy_write(bus, off, *(u32 *)buf, count); | |
578 | } | |
579 | ||
580 | /** | |
581 | * pci_mmap_legacy_mem - map legacy PCI memory into user memory space | |
2c3c8bea | 582 | * @filp: open sysfs file |
1da177e4 LT |
583 | * @kobj: kobject corresponding to device to be mapped |
584 | * @attr: struct bin_attribute for this file | |
585 | * @vma: struct vm_area_struct passed to mmap | |
586 | * | |
f19aeb1f | 587 | * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap |
1da177e4 LT |
588 | * legacy memory space (first meg of bus space) into application virtual |
589 | * memory space. | |
590 | */ | |
f19aeb1f | 591 | static int |
2c3c8bea CW |
592 | pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj, |
593 | struct bin_attribute *attr, | |
1da177e4 LT |
594 | struct vm_area_struct *vma) |
595 | { | |
596 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 597 | struct device, |
1da177e4 LT |
598 | kobj)); |
599 | ||
f19aeb1f BH |
600 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem); |
601 | } | |
602 | ||
603 | /** | |
604 | * pci_mmap_legacy_io - map legacy PCI IO into user memory space | |
2c3c8bea | 605 | * @filp: open sysfs file |
f19aeb1f BH |
606 | * @kobj: kobject corresponding to device to be mapped |
607 | * @attr: struct bin_attribute for this file | |
608 | * @vma: struct vm_area_struct passed to mmap | |
609 | * | |
610 | * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap | |
611 | * legacy IO space (first meg of bus space) into application virtual | |
612 | * memory space. Returns -ENOSYS if the operation isn't supported | |
613 | */ | |
614 | static int | |
2c3c8bea CW |
615 | pci_mmap_legacy_io(struct file *filp, struct kobject *kobj, |
616 | struct bin_attribute *attr, | |
f19aeb1f BH |
617 | struct vm_area_struct *vma) |
618 | { | |
619 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
620 | struct device, | |
621 | kobj)); | |
622 | ||
623 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io); | |
624 | } | |
625 | ||
10a0ef39 IK |
626 | /** |
627 | * pci_adjust_legacy_attr - adjustment of legacy file attributes | |
628 | * @b: bus to create files under | |
629 | * @mmap_type: I/O port or memory | |
630 | * | |
631 | * Stub implementation. Can be overridden by arch if necessary. | |
632 | */ | |
633 | void __weak | |
634 | pci_adjust_legacy_attr(struct pci_bus *b, enum pci_mmap_state mmap_type) | |
635 | { | |
636 | return; | |
637 | } | |
638 | ||
f19aeb1f BH |
639 | /** |
640 | * pci_create_legacy_files - create legacy I/O port and memory files | |
641 | * @b: bus to create files under | |
642 | * | |
643 | * Some platforms allow access to legacy I/O port and ISA memory space on | |
644 | * a per-bus basis. This routine creates the files and ties them into | |
645 | * their associated read, write and mmap files from pci-sysfs.c | |
646 | * | |
647 | * On error unwind, but don't propogate the error to the caller | |
648 | * as it is ok to set up the PCI bus without these files. | |
649 | */ | |
650 | void pci_create_legacy_files(struct pci_bus *b) | |
651 | { | |
652 | int error; | |
653 | ||
654 | b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2, | |
655 | GFP_ATOMIC); | |
656 | if (!b->legacy_io) | |
657 | goto kzalloc_err; | |
658 | ||
62e877b8 | 659 | sysfs_bin_attr_init(b->legacy_io); |
f19aeb1f BH |
660 | b->legacy_io->attr.name = "legacy_io"; |
661 | b->legacy_io->size = 0xffff; | |
662 | b->legacy_io->attr.mode = S_IRUSR | S_IWUSR; | |
663 | b->legacy_io->read = pci_read_legacy_io; | |
664 | b->legacy_io->write = pci_write_legacy_io; | |
665 | b->legacy_io->mmap = pci_mmap_legacy_io; | |
10a0ef39 | 666 | pci_adjust_legacy_attr(b, pci_mmap_io); |
f19aeb1f BH |
667 | error = device_create_bin_file(&b->dev, b->legacy_io); |
668 | if (error) | |
669 | goto legacy_io_err; | |
670 | ||
671 | /* Allocated above after the legacy_io struct */ | |
672 | b->legacy_mem = b->legacy_io + 1; | |
6757eca3 | 673 | sysfs_bin_attr_init(b->legacy_mem); |
f19aeb1f BH |
674 | b->legacy_mem->attr.name = "legacy_mem"; |
675 | b->legacy_mem->size = 1024*1024; | |
676 | b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR; | |
677 | b->legacy_mem->mmap = pci_mmap_legacy_mem; | |
10a0ef39 | 678 | pci_adjust_legacy_attr(b, pci_mmap_mem); |
f19aeb1f BH |
679 | error = device_create_bin_file(&b->dev, b->legacy_mem); |
680 | if (error) | |
681 | goto legacy_mem_err; | |
682 | ||
683 | return; | |
684 | ||
685 | legacy_mem_err: | |
686 | device_remove_bin_file(&b->dev, b->legacy_io); | |
687 | legacy_io_err: | |
688 | kfree(b->legacy_io); | |
689 | b->legacy_io = NULL; | |
690 | kzalloc_err: | |
691 | printk(KERN_WARNING "pci: warning: could not create legacy I/O port " | |
692 | "and ISA memory resources to sysfs\n"); | |
693 | return; | |
694 | } | |
695 | ||
696 | void pci_remove_legacy_files(struct pci_bus *b) | |
697 | { | |
698 | if (b->legacy_io) { | |
699 | device_remove_bin_file(&b->dev, b->legacy_io); | |
700 | device_remove_bin_file(&b->dev, b->legacy_mem); | |
701 | kfree(b->legacy_io); /* both are allocated here */ | |
702 | } | |
1da177e4 LT |
703 | } |
704 | #endif /* HAVE_PCI_LEGACY */ | |
705 | ||
706 | #ifdef HAVE_PCI_MMAP | |
b5ff7df3 | 707 | |
3b519e4e MW |
708 | int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma, |
709 | enum pci_mmap_api mmap_api) | |
b5ff7df3 | 710 | { |
3b519e4e | 711 | unsigned long nr, start, size, pci_start; |
b5ff7df3 | 712 | |
3b519e4e MW |
713 | if (pci_resource_len(pdev, resno) == 0) |
714 | return 0; | |
b5ff7df3 LT |
715 | nr = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; |
716 | start = vma->vm_pgoff; | |
88e7df0b | 717 | size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1; |
3b519e4e MW |
718 | pci_start = (mmap_api == PCI_MMAP_SYSFS) ? |
719 | pci_resource_start(pdev, resno) >> PAGE_SHIFT : 0; | |
720 | if (start >= pci_start && start < pci_start + size && | |
721 | start + nr <= pci_start + size) | |
b5ff7df3 | 722 | return 1; |
b5ff7df3 LT |
723 | return 0; |
724 | } | |
725 | ||
1da177e4 LT |
726 | /** |
727 | * pci_mmap_resource - map a PCI resource into user memory space | |
728 | * @kobj: kobject for mapping | |
729 | * @attr: struct bin_attribute for the file being mapped | |
730 | * @vma: struct vm_area_struct passed into the mmap | |
45aec1ae | 731 | * @write_combine: 1 for write_combine mapping |
1da177e4 LT |
732 | * |
733 | * Use the regular PCI mapping routines to map a PCI resource into userspace. | |
1da177e4 LT |
734 | */ |
735 | static int | |
736 | pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr, | |
45aec1ae | 737 | struct vm_area_struct *vma, int write_combine) |
1da177e4 LT |
738 | { |
739 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, | |
740 | struct device, kobj)); | |
a3f5835a | 741 | struct resource *res = attr->private; |
1da177e4 | 742 | enum pci_mmap_state mmap_type; |
e31dd6e4 | 743 | resource_size_t start, end; |
2311b1f2 | 744 | int i; |
1da177e4 | 745 | |
2311b1f2 ME |
746 | for (i = 0; i < PCI_ROM_RESOURCE; i++) |
747 | if (res == &pdev->resource[i]) | |
748 | break; | |
749 | if (i >= PCI_ROM_RESOURCE) | |
750 | return -ENODEV; | |
751 | ||
3b519e4e MW |
752 | if (!pci_mmap_fits(pdev, i, vma, PCI_MMAP_SYSFS)) { |
753 | WARN(1, "process \"%s\" tried to map 0x%08lx bytes " | |
754 | "at page 0x%08lx on %s BAR %d (start 0x%16Lx, size 0x%16Lx)\n", | |
755 | current->comm, vma->vm_end-vma->vm_start, vma->vm_pgoff, | |
756 | pci_name(pdev), i, | |
757 | pci_resource_start(pdev, i), pci_resource_len(pdev, i)); | |
b5ff7df3 | 758 | return -EINVAL; |
3b519e4e | 759 | } |
b5ff7df3 | 760 | |
2311b1f2 ME |
761 | /* pci_mmap_page_range() expects the same kind of entry as coming |
762 | * from /proc/bus/pci/ which is a "user visible" value. If this is | |
763 | * different from the resource itself, arch will do necessary fixup. | |
764 | */ | |
765 | pci_resource_to_user(pdev, i, res, &start, &end); | |
766 | vma->vm_pgoff += start >> PAGE_SHIFT; | |
1da177e4 LT |
767 | mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io; |
768 | ||
e8de1481 AV |
769 | if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(start)) |
770 | return -EINVAL; | |
771 | ||
45aec1ae | 772 | return pci_mmap_page_range(pdev, vma, mmap_type, write_combine); |
773 | } | |
774 | ||
775 | static int | |
2c3c8bea CW |
776 | pci_mmap_resource_uc(struct file *filp, struct kobject *kobj, |
777 | struct bin_attribute *attr, | |
45aec1ae | 778 | struct vm_area_struct *vma) |
779 | { | |
780 | return pci_mmap_resource(kobj, attr, vma, 0); | |
781 | } | |
782 | ||
783 | static int | |
2c3c8bea CW |
784 | pci_mmap_resource_wc(struct file *filp, struct kobject *kobj, |
785 | struct bin_attribute *attr, | |
45aec1ae | 786 | struct vm_area_struct *vma) |
787 | { | |
788 | return pci_mmap_resource(kobj, attr, vma, 1); | |
1da177e4 LT |
789 | } |
790 | ||
8633328b AW |
791 | static ssize_t |
792 | pci_resource_io(struct file *filp, struct kobject *kobj, | |
793 | struct bin_attribute *attr, char *buf, | |
794 | loff_t off, size_t count, bool write) | |
795 | { | |
796 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, | |
797 | struct device, kobj)); | |
798 | struct resource *res = attr->private; | |
799 | unsigned long port = off; | |
800 | int i; | |
801 | ||
802 | for (i = 0; i < PCI_ROM_RESOURCE; i++) | |
803 | if (res == &pdev->resource[i]) | |
804 | break; | |
805 | if (i >= PCI_ROM_RESOURCE) | |
806 | return -ENODEV; | |
807 | ||
808 | port += pci_resource_start(pdev, i); | |
809 | ||
810 | if (port > pci_resource_end(pdev, i)) | |
811 | return 0; | |
812 | ||
813 | if (port + count - 1 > pci_resource_end(pdev, i)) | |
814 | return -EINVAL; | |
815 | ||
816 | switch (count) { | |
817 | case 1: | |
818 | if (write) | |
819 | outb(*(u8 *)buf, port); | |
820 | else | |
821 | *(u8 *)buf = inb(port); | |
822 | return 1; | |
823 | case 2: | |
824 | if (write) | |
825 | outw(*(u16 *)buf, port); | |
826 | else | |
827 | *(u16 *)buf = inw(port); | |
828 | return 2; | |
829 | case 4: | |
830 | if (write) | |
831 | outl(*(u32 *)buf, port); | |
832 | else | |
833 | *(u32 *)buf = inl(port); | |
834 | return 4; | |
835 | } | |
836 | return -EINVAL; | |
837 | } | |
838 | ||
839 | static ssize_t | |
840 | pci_read_resource_io(struct file *filp, struct kobject *kobj, | |
841 | struct bin_attribute *attr, char *buf, | |
842 | loff_t off, size_t count) | |
843 | { | |
844 | return pci_resource_io(filp, kobj, attr, buf, off, count, false); | |
845 | } | |
846 | ||
847 | static ssize_t | |
848 | pci_write_resource_io(struct file *filp, struct kobject *kobj, | |
849 | struct bin_attribute *attr, char *buf, | |
850 | loff_t off, size_t count) | |
851 | { | |
852 | return pci_resource_io(filp, kobj, attr, buf, off, count, true); | |
853 | } | |
854 | ||
b19441af GKH |
855 | /** |
856 | * pci_remove_resource_files - cleanup resource files | |
cffb2faf | 857 | * @pdev: dev to cleanup |
b19441af | 858 | * |
cffb2faf | 859 | * If we created resource files for @pdev, remove them from sysfs and |
b19441af GKH |
860 | * free their resources. |
861 | */ | |
862 | static void | |
863 | pci_remove_resource_files(struct pci_dev *pdev) | |
864 | { | |
865 | int i; | |
866 | ||
867 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
868 | struct bin_attribute *res_attr; | |
869 | ||
870 | res_attr = pdev->res_attr[i]; | |
871 | if (res_attr) { | |
872 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
873 | kfree(res_attr); | |
874 | } | |
45aec1ae | 875 | |
876 | res_attr = pdev->res_attr_wc[i]; | |
877 | if (res_attr) { | |
878 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
879 | kfree(res_attr); | |
880 | } | |
b19441af GKH |
881 | } |
882 | } | |
883 | ||
45aec1ae | 884 | static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine) |
885 | { | |
886 | /* allocate attribute structure, piggyback attribute name */ | |
887 | int name_len = write_combine ? 13 : 10; | |
888 | struct bin_attribute *res_attr; | |
889 | int retval; | |
890 | ||
891 | res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC); | |
892 | if (res_attr) { | |
893 | char *res_attr_name = (char *)(res_attr + 1); | |
894 | ||
a07e4156 | 895 | sysfs_bin_attr_init(res_attr); |
45aec1ae | 896 | if (write_combine) { |
897 | pdev->res_attr_wc[num] = res_attr; | |
898 | sprintf(res_attr_name, "resource%d_wc", num); | |
899 | res_attr->mmap = pci_mmap_resource_wc; | |
900 | } else { | |
901 | pdev->res_attr[num] = res_attr; | |
902 | sprintf(res_attr_name, "resource%d", num); | |
903 | res_attr->mmap = pci_mmap_resource_uc; | |
904 | } | |
8633328b AW |
905 | if (pci_resource_flags(pdev, num) & IORESOURCE_IO) { |
906 | res_attr->read = pci_read_resource_io; | |
907 | res_attr->write = pci_write_resource_io; | |
908 | } | |
45aec1ae | 909 | res_attr->attr.name = res_attr_name; |
910 | res_attr->attr.mode = S_IRUSR | S_IWUSR; | |
911 | res_attr->size = pci_resource_len(pdev, num); | |
912 | res_attr->private = &pdev->resource[num]; | |
913 | retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr); | |
914 | } else | |
915 | retval = -ENOMEM; | |
916 | ||
917 | return retval; | |
918 | } | |
919 | ||
1da177e4 LT |
920 | /** |
921 | * pci_create_resource_files - create resource files in sysfs for @dev | |
cffb2faf | 922 | * @pdev: dev in question |
1da177e4 | 923 | * |
cffb2faf | 924 | * Walk the resources in @pdev creating files for each resource available. |
1da177e4 | 925 | */ |
b19441af | 926 | static int pci_create_resource_files(struct pci_dev *pdev) |
1da177e4 LT |
927 | { |
928 | int i; | |
b19441af | 929 | int retval; |
1da177e4 LT |
930 | |
931 | /* Expose the PCI resources from this device as files */ | |
932 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
1da177e4 LT |
933 | |
934 | /* skip empty resources */ | |
935 | if (!pci_resource_len(pdev, i)) | |
936 | continue; | |
937 | ||
45aec1ae | 938 | retval = pci_create_attr(pdev, i, 0); |
939 | /* for prefetchable resources, create a WC mappable file */ | |
940 | if (!retval && pdev->resource[i].flags & IORESOURCE_PREFETCH) | |
941 | retval = pci_create_attr(pdev, i, 1); | |
942 | ||
943 | if (retval) { | |
944 | pci_remove_resource_files(pdev); | |
945 | return retval; | |
1da177e4 LT |
946 | } |
947 | } | |
b19441af | 948 | return 0; |
1da177e4 LT |
949 | } |
950 | #else /* !HAVE_PCI_MMAP */ | |
10a0ef39 IK |
951 | int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; } |
952 | void __weak pci_remove_resource_files(struct pci_dev *dev) { return; } | |
1da177e4 LT |
953 | #endif /* HAVE_PCI_MMAP */ |
954 | ||
955 | /** | |
956 | * pci_write_rom - used to enable access to the PCI ROM display | |
2c3c8bea | 957 | * @filp: sysfs file |
1da177e4 | 958 | * @kobj: kernel object handle |
cffb2faf | 959 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
960 | * @buf: user input |
961 | * @off: file offset | |
962 | * @count: number of byte in input | |
963 | * | |
964 | * writing anything except 0 enables it | |
965 | */ | |
966 | static ssize_t | |
2c3c8bea CW |
967 | pci_write_rom(struct file *filp, struct kobject *kobj, |
968 | struct bin_attribute *bin_attr, | |
91a69029 | 969 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
970 | { |
971 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj)); | |
972 | ||
973 | if ((off == 0) && (*buf == '0') && (count == 2)) | |
974 | pdev->rom_attr_enabled = 0; | |
975 | else | |
976 | pdev->rom_attr_enabled = 1; | |
977 | ||
978 | return count; | |
979 | } | |
980 | ||
981 | /** | |
982 | * pci_read_rom - read a PCI ROM | |
2c3c8bea | 983 | * @filp: sysfs file |
1da177e4 | 984 | * @kobj: kernel object handle |
cffb2faf | 985 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
986 | * @buf: where to put the data we read from the ROM |
987 | * @off: file offset | |
988 | * @count: number of bytes to read | |
989 | * | |
990 | * Put @count bytes starting at @off into @buf from the ROM in the PCI | |
991 | * device corresponding to @kobj. | |
992 | */ | |
993 | static ssize_t | |
2c3c8bea CW |
994 | pci_read_rom(struct file *filp, struct kobject *kobj, |
995 | struct bin_attribute *bin_attr, | |
91a69029 | 996 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
997 | { |
998 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj)); | |
999 | void __iomem *rom; | |
1000 | size_t size; | |
1001 | ||
1002 | if (!pdev->rom_attr_enabled) | |
1003 | return -EINVAL; | |
1004 | ||
1005 | rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */ | |
97c44836 TN |
1006 | if (!rom || !size) |
1007 | return -EIO; | |
1da177e4 LT |
1008 | |
1009 | if (off >= size) | |
1010 | count = 0; | |
1011 | else { | |
1012 | if (off + count > size) | |
1013 | count = size - off; | |
1014 | ||
1015 | memcpy_fromio(buf, rom + off, count); | |
1016 | } | |
1017 | pci_unmap_rom(pdev, rom); | |
1018 | ||
1019 | return count; | |
1020 | } | |
1021 | ||
1022 | static struct bin_attribute pci_config_attr = { | |
1023 | .attr = { | |
1024 | .name = "config", | |
1025 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 1026 | }, |
557848c3 | 1027 | .size = PCI_CFG_SPACE_SIZE, |
1da177e4 LT |
1028 | .read = pci_read_config, |
1029 | .write = pci_write_config, | |
1030 | }; | |
1031 | ||
1032 | static struct bin_attribute pcie_config_attr = { | |
1033 | .attr = { | |
1034 | .name = "config", | |
1035 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 1036 | }, |
557848c3 | 1037 | .size = PCI_CFG_SPACE_EXP_SIZE, |
1da177e4 LT |
1038 | .read = pci_read_config, |
1039 | .write = pci_write_config, | |
1040 | }; | |
1041 | ||
a2cd52ca | 1042 | int __attribute__ ((weak)) pcibios_add_platform_entries(struct pci_dev *dev) |
575e3348 | 1043 | { |
a2cd52ca | 1044 | return 0; |
575e3348 ME |
1045 | } |
1046 | ||
711d5779 MT |
1047 | static ssize_t reset_store(struct device *dev, |
1048 | struct device_attribute *attr, const char *buf, | |
1049 | size_t count) | |
1050 | { | |
1051 | struct pci_dev *pdev = to_pci_dev(dev); | |
1052 | unsigned long val; | |
1053 | ssize_t result = strict_strtoul(buf, 0, &val); | |
1054 | ||
1055 | if (result < 0) | |
1056 | return result; | |
1057 | ||
1058 | if (val != 1) | |
1059 | return -EINVAL; | |
447c5dd7 MS |
1060 | |
1061 | result = pci_reset_function(pdev); | |
1062 | if (result < 0) | |
1063 | return result; | |
1064 | ||
1065 | return count; | |
711d5779 MT |
1066 | } |
1067 | ||
1068 | static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store); | |
1069 | ||
280c73d3 ZY |
1070 | static int pci_create_capabilities_sysfs(struct pci_dev *dev) |
1071 | { | |
1072 | int retval; | |
1073 | struct bin_attribute *attr; | |
1074 | ||
1075 | /* If the device has VPD, try to expose it in sysfs. */ | |
1076 | if (dev->vpd) { | |
1077 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); | |
1078 | if (!attr) | |
1079 | return -ENOMEM; | |
1080 | ||
a07e4156 | 1081 | sysfs_bin_attr_init(attr); |
280c73d3 ZY |
1082 | attr->size = dev->vpd->len; |
1083 | attr->attr.name = "vpd"; | |
1084 | attr->attr.mode = S_IRUSR | S_IWUSR; | |
287d19ce SH |
1085 | attr->read = read_vpd_attr; |
1086 | attr->write = write_vpd_attr; | |
280c73d3 ZY |
1087 | retval = sysfs_create_bin_file(&dev->dev.kobj, attr); |
1088 | if (retval) { | |
1089 | kfree(dev->vpd->attr); | |
1090 | return retval; | |
1091 | } | |
1092 | dev->vpd->attr = attr; | |
1093 | } | |
1094 | ||
1095 | /* Active State Power Management */ | |
1096 | pcie_aspm_create_sysfs_dev_files(dev); | |
1097 | ||
711d5779 MT |
1098 | if (!pci_probe_reset_function(dev)) { |
1099 | retval = device_create_file(&dev->dev, &reset_attr); | |
1100 | if (retval) | |
1101 | goto error; | |
1102 | dev->reset_fn = 1; | |
1103 | } | |
280c73d3 | 1104 | return 0; |
711d5779 MT |
1105 | |
1106 | error: | |
1107 | pcie_aspm_remove_sysfs_dev_files(dev); | |
1108 | if (dev->vpd && dev->vpd->attr) { | |
1109 | sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr); | |
1110 | kfree(dev->vpd->attr); | |
1111 | } | |
1112 | ||
1113 | return retval; | |
280c73d3 ZY |
1114 | } |
1115 | ||
b19441af | 1116 | int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev) |
1da177e4 | 1117 | { |
b19441af | 1118 | int retval; |
280c73d3 ZY |
1119 | int rom_size = 0; |
1120 | struct bin_attribute *attr; | |
b19441af | 1121 | |
1da177e4 LT |
1122 | if (!sysfs_initialized) |
1123 | return -EACCES; | |
1124 | ||
557848c3 | 1125 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
b19441af | 1126 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1da177e4 | 1127 | else |
b19441af GKH |
1128 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
1129 | if (retval) | |
1130 | goto err; | |
1da177e4 | 1131 | |
b19441af GKH |
1132 | retval = pci_create_resource_files(pdev); |
1133 | if (retval) | |
280c73d3 ZY |
1134 | goto err_config_file; |
1135 | ||
1136 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) | |
1137 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); | |
1138 | else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW) | |
1139 | rom_size = 0x20000; | |
1da177e4 LT |
1140 | |
1141 | /* If the device has a ROM, try to expose it in sysfs. */ | |
280c73d3 | 1142 | if (rom_size) { |
94e61088 | 1143 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); |
280c73d3 | 1144 | if (!attr) { |
b19441af | 1145 | retval = -ENOMEM; |
9890b12a | 1146 | goto err_resource_files; |
1da177e4 | 1147 | } |
a07e4156 | 1148 | sysfs_bin_attr_init(attr); |
280c73d3 ZY |
1149 | attr->size = rom_size; |
1150 | attr->attr.name = "rom"; | |
1151 | attr->attr.mode = S_IRUSR; | |
1152 | attr->read = pci_read_rom; | |
1153 | attr->write = pci_write_rom; | |
1154 | retval = sysfs_create_bin_file(&pdev->dev.kobj, attr); | |
1155 | if (retval) { | |
1156 | kfree(attr); | |
1157 | goto err_resource_files; | |
1158 | } | |
1159 | pdev->rom_attr = attr; | |
1da177e4 | 1160 | } |
280c73d3 | 1161 | |
217f45de DA |
1162 | if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) { |
1163 | retval = device_create_file(&pdev->dev, &vga_attr); | |
1164 | if (retval) | |
1165 | goto err_rom_file; | |
1166 | } | |
1167 | ||
1da177e4 | 1168 | /* add platform-specific attributes */ |
280c73d3 ZY |
1169 | retval = pcibios_add_platform_entries(pdev); |
1170 | if (retval) | |
217f45de | 1171 | goto err_vga_file; |
b19441af | 1172 | |
280c73d3 ZY |
1173 | /* add sysfs entries for various capabilities */ |
1174 | retval = pci_create_capabilities_sysfs(pdev); | |
1175 | if (retval) | |
217f45de | 1176 | goto err_vga_file; |
7d715a6c | 1177 | |
911e1c9b N |
1178 | pci_create_firmware_label_files(pdev); |
1179 | ||
1da177e4 | 1180 | return 0; |
b19441af | 1181 | |
217f45de DA |
1182 | err_vga_file: |
1183 | if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) | |
1184 | device_remove_file(&pdev->dev, &vga_attr); | |
a2cd52ca | 1185 | err_rom_file: |
280c73d3 | 1186 | if (rom_size) { |
94e61088 | 1187 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); |
280c73d3 ZY |
1188 | kfree(pdev->rom_attr); |
1189 | pdev->rom_attr = NULL; | |
1190 | } | |
9890b12a ME |
1191 | err_resource_files: |
1192 | pci_remove_resource_files(pdev); | |
94e61088 | 1193 | err_config_file: |
557848c3 | 1194 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
b19441af GKH |
1195 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1196 | else | |
1197 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); | |
1198 | err: | |
1199 | return retval; | |
1da177e4 LT |
1200 | } |
1201 | ||
280c73d3 ZY |
1202 | static void pci_remove_capabilities_sysfs(struct pci_dev *dev) |
1203 | { | |
1204 | if (dev->vpd && dev->vpd->attr) { | |
1205 | sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr); | |
1206 | kfree(dev->vpd->attr); | |
1207 | } | |
1208 | ||
1209 | pcie_aspm_remove_sysfs_dev_files(dev); | |
711d5779 MT |
1210 | if (dev->reset_fn) { |
1211 | device_remove_file(&dev->dev, &reset_attr); | |
1212 | dev->reset_fn = 0; | |
1213 | } | |
280c73d3 ZY |
1214 | } |
1215 | ||
1da177e4 LT |
1216 | /** |
1217 | * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files | |
1218 | * @pdev: device whose entries we should free | |
1219 | * | |
1220 | * Cleanup when @pdev is removed from sysfs. | |
1221 | */ | |
1222 | void pci_remove_sysfs_dev_files(struct pci_dev *pdev) | |
1223 | { | |
280c73d3 ZY |
1224 | int rom_size = 0; |
1225 | ||
d67afe5e DM |
1226 | if (!sysfs_initialized) |
1227 | return; | |
1228 | ||
280c73d3 | 1229 | pci_remove_capabilities_sysfs(pdev); |
7d715a6c | 1230 | |
557848c3 | 1231 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
1da177e4 LT |
1232 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1233 | else | |
1234 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); | |
1235 | ||
1236 | pci_remove_resource_files(pdev); | |
1237 | ||
280c73d3 ZY |
1238 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) |
1239 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); | |
1240 | else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW) | |
1241 | rom_size = 0x20000; | |
1242 | ||
1243 | if (rom_size && pdev->rom_attr) { | |
1244 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); | |
1245 | kfree(pdev->rom_attr); | |
1da177e4 | 1246 | } |
911e1c9b N |
1247 | |
1248 | pci_remove_firmware_label_files(pdev); | |
1249 | ||
1da177e4 LT |
1250 | } |
1251 | ||
1252 | static int __init pci_sysfs_init(void) | |
1253 | { | |
1254 | struct pci_dev *pdev = NULL; | |
b19441af GKH |
1255 | int retval; |
1256 | ||
1da177e4 | 1257 | sysfs_initialized = 1; |
b19441af GKH |
1258 | for_each_pci_dev(pdev) { |
1259 | retval = pci_create_sysfs_dev_files(pdev); | |
151fc5df JL |
1260 | if (retval) { |
1261 | pci_dev_put(pdev); | |
b19441af | 1262 | return retval; |
151fc5df | 1263 | } |
b19441af | 1264 | } |
1da177e4 LT |
1265 | |
1266 | return 0; | |
1267 | } | |
1268 | ||
40ee9e9f | 1269 | late_initcall(pci_sysfs_init); |