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> | |
363c75db | 22 | #include <linux/export.h> |
1da177e4 LT |
23 | #include <linux/topology.h> |
24 | #include <linux/mm.h> | |
de139a33 | 25 | #include <linux/fs.h> |
aa0ac365 | 26 | #include <linux/capability.h> |
a628e7b8 | 27 | #include <linux/security.h> |
7d715a6c | 28 | #include <linux/pci-aspm.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
1a39b310 | 30 | #include <linux/vgaarb.h> |
448bd857 | 31 | #include <linux/pm_runtime.h> |
1da177e4 LT |
32 | #include "pci.h" |
33 | ||
34 | static int sysfs_initialized; /* = 0 */ | |
35 | ||
36 | /* show configuration fields */ | |
37 | #define pci_config_attr(field, format_string) \ | |
38 | static ssize_t \ | |
e404e274 | 39 | field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
40 | { \ |
41 | struct pci_dev *pdev; \ | |
42 | \ | |
43 | pdev = to_pci_dev (dev); \ | |
44 | return sprintf (buf, format_string, pdev->field); \ | |
45 | } | |
46 | ||
47 | pci_config_attr(vendor, "0x%04x\n"); | |
48 | pci_config_attr(device, "0x%04x\n"); | |
49 | pci_config_attr(subsystem_vendor, "0x%04x\n"); | |
50 | pci_config_attr(subsystem_device, "0x%04x\n"); | |
51 | pci_config_attr(class, "0x%06x\n"); | |
52 | pci_config_attr(irq, "%u\n"); | |
53 | ||
bdee9d98 DT |
54 | static ssize_t broken_parity_status_show(struct device *dev, |
55 | struct device_attribute *attr, | |
56 | char *buf) | |
57 | { | |
58 | struct pci_dev *pdev = to_pci_dev(dev); | |
59 | return sprintf (buf, "%u\n", pdev->broken_parity_status); | |
60 | } | |
61 | ||
62 | static ssize_t broken_parity_status_store(struct device *dev, | |
63 | struct device_attribute *attr, | |
64 | const char *buf, size_t count) | |
65 | { | |
66 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 | 67 | unsigned long val; |
bdee9d98 | 68 | |
92425a40 TP |
69 | if (strict_strtoul(buf, 0, &val) < 0) |
70 | return -EINVAL; | |
71 | ||
72 | pdev->broken_parity_status = !!val; | |
73 | ||
74 | return count; | |
bdee9d98 DT |
75 | } |
76 | ||
4327edf6 AC |
77 | static ssize_t local_cpus_show(struct device *dev, |
78 | struct device_attribute *attr, char *buf) | |
1da177e4 | 79 | { |
3be83050 | 80 | const struct cpumask *mask; |
4327edf6 AC |
81 | int len; |
82 | ||
e0cd5160 | 83 | #ifdef CONFIG_NUMA |
6be954d1 DJ |
84 | mask = (dev_to_node(dev) == -1) ? cpu_online_mask : |
85 | cpumask_of_node(dev_to_node(dev)); | |
e0cd5160 | 86 | #else |
3be83050 | 87 | mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); |
e0cd5160 | 88 | #endif |
3be83050 | 89 | len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask); |
39106dcf MT |
90 | buf[len++] = '\n'; |
91 | buf[len] = '\0'; | |
92 | return len; | |
93 | } | |
94 | ||
95 | ||
96 | static ssize_t local_cpulist_show(struct device *dev, | |
97 | struct device_attribute *attr, char *buf) | |
98 | { | |
3be83050 | 99 | const struct cpumask *mask; |
39106dcf MT |
100 | int len; |
101 | ||
e0cd5160 | 102 | #ifdef CONFIG_NUMA |
6be954d1 DJ |
103 | mask = (dev_to_node(dev) == -1) ? cpu_online_mask : |
104 | cpumask_of_node(dev_to_node(dev)); | |
e0cd5160 | 105 | #else |
3be83050 | 106 | mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); |
e0cd5160 | 107 | #endif |
3be83050 | 108 | len = cpulist_scnprintf(buf, PAGE_SIZE-2, mask); |
39106dcf MT |
109 | buf[len++] = '\n'; |
110 | buf[len] = '\0'; | |
111 | return len; | |
1da177e4 LT |
112 | } |
113 | ||
dc2c2c9d YL |
114 | /* |
115 | * PCI Bus Class Devices | |
116 | */ | |
117 | static ssize_t pci_bus_show_cpuaffinity(struct device *dev, | |
118 | int type, | |
119 | struct device_attribute *attr, | |
120 | char *buf) | |
121 | { | |
122 | int ret; | |
123 | const struct cpumask *cpumask; | |
124 | ||
125 | cpumask = cpumask_of_pcibus(to_pci_bus(dev)); | |
126 | ret = type ? | |
127 | cpulist_scnprintf(buf, PAGE_SIZE-2, cpumask) : | |
128 | cpumask_scnprintf(buf, PAGE_SIZE-2, cpumask); | |
129 | buf[ret++] = '\n'; | |
130 | buf[ret] = '\0'; | |
131 | return ret; | |
132 | } | |
133 | ||
134 | static inline ssize_t pci_bus_show_cpumaskaffinity(struct device *dev, | |
135 | struct device_attribute *attr, | |
136 | char *buf) | |
137 | { | |
138 | return pci_bus_show_cpuaffinity(dev, 0, attr, buf); | |
139 | } | |
140 | ||
141 | static inline ssize_t pci_bus_show_cpulistaffinity(struct device *dev, | |
142 | struct device_attribute *attr, | |
143 | char *buf) | |
144 | { | |
145 | return pci_bus_show_cpuaffinity(dev, 1, attr, buf); | |
146 | } | |
147 | ||
1da177e4 LT |
148 | /* show resources */ |
149 | static ssize_t | |
e404e274 | 150 | resource_show(struct device * dev, struct device_attribute *attr, char * buf) |
1da177e4 LT |
151 | { |
152 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
153 | char * str = buf; | |
154 | int i; | |
fde09c6d | 155 | int max; |
e31dd6e4 | 156 | resource_size_t start, end; |
1da177e4 LT |
157 | |
158 | if (pci_dev->subordinate) | |
159 | max = DEVICE_COUNT_RESOURCE; | |
fde09c6d YZ |
160 | else |
161 | max = PCI_BRIDGE_RESOURCES; | |
1da177e4 LT |
162 | |
163 | for (i = 0; i < max; i++) { | |
2311b1f2 ME |
164 | struct resource *res = &pci_dev->resource[i]; |
165 | pci_resource_to_user(pci_dev, i, res, &start, &end); | |
166 | str += sprintf(str,"0x%016llx 0x%016llx 0x%016llx\n", | |
167 | (unsigned long long)start, | |
168 | (unsigned long long)end, | |
169 | (unsigned long long)res->flags); | |
1da177e4 LT |
170 | } |
171 | return (str - buf); | |
172 | } | |
173 | ||
87c8a443 | 174 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) |
9888549e GK |
175 | { |
176 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
177 | ||
178 | return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n", | |
179 | pci_dev->vendor, pci_dev->device, | |
180 | pci_dev->subsystem_vendor, pci_dev->subsystem_device, | |
181 | (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8), | |
182 | (u8)(pci_dev->class)); | |
183 | } | |
bae94d02 IPG |
184 | |
185 | static ssize_t is_enabled_store(struct device *dev, | |
186 | struct device_attribute *attr, const char *buf, | |
187 | size_t count) | |
9f125d30 AV |
188 | { |
189 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 TP |
190 | unsigned long val; |
191 | ssize_t result = strict_strtoul(buf, 0, &val); | |
192 | ||
193 | if (result < 0) | |
194 | return result; | |
9f125d30 AV |
195 | |
196 | /* this can crash the machine when done on the "wrong" device */ | |
197 | if (!capable(CAP_SYS_ADMIN)) | |
92425a40 | 198 | return -EPERM; |
9f125d30 | 199 | |
92425a40 | 200 | if (!val) { |
296ccb08 | 201 | if (pci_is_enabled(pdev)) |
bae94d02 IPG |
202 | pci_disable_device(pdev); |
203 | else | |
204 | result = -EIO; | |
92425a40 | 205 | } else |
bae94d02 | 206 | result = pci_enable_device(pdev); |
9f125d30 | 207 | |
bae94d02 IPG |
208 | return result < 0 ? result : count; |
209 | } | |
210 | ||
211 | static ssize_t is_enabled_show(struct device *dev, | |
212 | struct device_attribute *attr, char *buf) | |
213 | { | |
214 | struct pci_dev *pdev; | |
9f125d30 | 215 | |
bae94d02 IPG |
216 | pdev = to_pci_dev (dev); |
217 | return sprintf (buf, "%u\n", atomic_read(&pdev->enable_cnt)); | |
9f125d30 AV |
218 | } |
219 | ||
81bb0e19 BG |
220 | #ifdef CONFIG_NUMA |
221 | static ssize_t | |
222 | numa_node_show(struct device *dev, struct device_attribute *attr, char *buf) | |
223 | { | |
224 | return sprintf (buf, "%d\n", dev->numa_node); | |
225 | } | |
226 | #endif | |
227 | ||
bb965401 YL |
228 | static ssize_t |
229 | dma_mask_bits_show(struct device *dev, struct device_attribute *attr, char *buf) | |
230 | { | |
231 | struct pci_dev *pdev = to_pci_dev(dev); | |
232 | ||
233 | return sprintf (buf, "%d\n", fls64(pdev->dma_mask)); | |
234 | } | |
235 | ||
236 | static ssize_t | |
237 | consistent_dma_mask_bits_show(struct device *dev, struct device_attribute *attr, | |
238 | char *buf) | |
239 | { | |
240 | return sprintf (buf, "%d\n", fls64(dev->coherent_dma_mask)); | |
241 | } | |
242 | ||
fe97064c BG |
243 | static ssize_t |
244 | msi_bus_show(struct device *dev, struct device_attribute *attr, char *buf) | |
245 | { | |
246 | struct pci_dev *pdev = to_pci_dev(dev); | |
247 | ||
248 | if (!pdev->subordinate) | |
249 | return 0; | |
250 | ||
251 | return sprintf (buf, "%u\n", | |
252 | !(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI)); | |
253 | } | |
254 | ||
255 | static ssize_t | |
256 | msi_bus_store(struct device *dev, struct device_attribute *attr, | |
257 | const char *buf, size_t count) | |
258 | { | |
259 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 TP |
260 | unsigned long val; |
261 | ||
262 | if (strict_strtoul(buf, 0, &val) < 0) | |
263 | return -EINVAL; | |
fe97064c BG |
264 | |
265 | /* bad things may happen if the no_msi flag is changed | |
266 | * while some drivers are loaded */ | |
267 | if (!capable(CAP_SYS_ADMIN)) | |
92425a40 | 268 | return -EPERM; |
fe97064c | 269 | |
92425a40 TP |
270 | /* Maybe pci devices without subordinate busses shouldn't even have this |
271 | * attribute in the first place? */ | |
fe97064c BG |
272 | if (!pdev->subordinate) |
273 | return count; | |
274 | ||
92425a40 TP |
275 | /* Is the flag going to change, or keep the value it already had? */ |
276 | if (!(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) ^ | |
277 | !!val) { | |
278 | pdev->subordinate->bus_flags ^= PCI_BUS_FLAGS_NO_MSI; | |
fe97064c | 279 | |
92425a40 TP |
280 | dev_warn(&pdev->dev, "forced subordinate bus to%s support MSI," |
281 | " bad things could happen\n", val ? "" : " not"); | |
fe97064c BG |
282 | } |
283 | ||
284 | return count; | |
285 | } | |
9888549e | 286 | |
705b1aaa AC |
287 | static DEFINE_MUTEX(pci_remove_rescan_mutex); |
288 | static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf, | |
289 | size_t count) | |
290 | { | |
291 | unsigned long val; | |
292 | struct pci_bus *b = NULL; | |
293 | ||
294 | if (strict_strtoul(buf, 0, &val) < 0) | |
295 | return -EINVAL; | |
296 | ||
297 | if (val) { | |
298 | mutex_lock(&pci_remove_rescan_mutex); | |
299 | while ((b = pci_find_next_bus(b)) != NULL) | |
300 | pci_rescan_bus(b); | |
301 | mutex_unlock(&pci_remove_rescan_mutex); | |
302 | } | |
303 | return count; | |
304 | } | |
305 | ||
306 | struct bus_attribute pci_bus_attrs[] = { | |
307 | __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store), | |
308 | __ATTR_NULL | |
309 | }; | |
77c27c7b | 310 | |
738a6396 AC |
311 | static ssize_t |
312 | dev_rescan_store(struct device *dev, struct device_attribute *attr, | |
313 | const char *buf, size_t count) | |
314 | { | |
315 | unsigned long val; | |
316 | struct pci_dev *pdev = to_pci_dev(dev); | |
317 | ||
318 | if (strict_strtoul(buf, 0, &val) < 0) | |
319 | return -EINVAL; | |
320 | ||
321 | if (val) { | |
322 | mutex_lock(&pci_remove_rescan_mutex); | |
323 | pci_rescan_bus(pdev->bus); | |
324 | mutex_unlock(&pci_remove_rescan_mutex); | |
325 | } | |
326 | return count; | |
327 | } | |
328 | ||
77c27c7b AC |
329 | static void remove_callback(struct device *dev) |
330 | { | |
331 | struct pci_dev *pdev = to_pci_dev(dev); | |
332 | ||
333 | mutex_lock(&pci_remove_rescan_mutex); | |
210647af | 334 | pci_stop_and_remove_bus_device(pdev); |
77c27c7b AC |
335 | mutex_unlock(&pci_remove_rescan_mutex); |
336 | } | |
337 | ||
338 | static ssize_t | |
339 | remove_store(struct device *dev, struct device_attribute *dummy, | |
340 | const char *buf, size_t count) | |
341 | { | |
342 | int ret = 0; | |
343 | unsigned long val; | |
77c27c7b AC |
344 | |
345 | if (strict_strtoul(buf, 0, &val) < 0) | |
346 | return -EINVAL; | |
347 | ||
77c27c7b AC |
348 | /* An attribute cannot be unregistered by one of its own methods, |
349 | * so we have to use this roundabout approach. | |
350 | */ | |
351 | if (val) | |
352 | ret = device_schedule_callback(dev, remove_callback); | |
353 | if (ret) | |
354 | count = ret; | |
355 | return count; | |
356 | } | |
b9d320fc YL |
357 | |
358 | static ssize_t | |
359 | dev_bus_rescan_store(struct device *dev, struct device_attribute *attr, | |
360 | const char *buf, size_t count) | |
361 | { | |
362 | unsigned long val; | |
363 | struct pci_bus *bus = to_pci_bus(dev); | |
364 | ||
365 | if (strict_strtoul(buf, 0, &val) < 0) | |
366 | return -EINVAL; | |
367 | ||
368 | if (val) { | |
369 | mutex_lock(&pci_remove_rescan_mutex); | |
2f320521 YL |
370 | if (!pci_is_root_bus(bus) && list_empty(&bus->devices)) |
371 | pci_rescan_bus_bridge_resize(bus->self); | |
372 | else | |
373 | pci_rescan_bus(bus); | |
b9d320fc YL |
374 | mutex_unlock(&pci_remove_rescan_mutex); |
375 | } | |
376 | return count; | |
377 | } | |
378 | ||
448bd857 HY |
379 | #if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI) |
380 | static ssize_t d3cold_allowed_store(struct device *dev, | |
381 | struct device_attribute *attr, | |
382 | const char *buf, size_t count) | |
383 | { | |
384 | struct pci_dev *pdev = to_pci_dev(dev); | |
385 | unsigned long val; | |
386 | ||
387 | if (strict_strtoul(buf, 0, &val) < 0) | |
388 | return -EINVAL; | |
389 | ||
390 | pdev->d3cold_allowed = !!val; | |
391 | pm_runtime_resume(dev); | |
392 | ||
393 | return count; | |
394 | } | |
395 | ||
396 | static ssize_t d3cold_allowed_show(struct device *dev, | |
397 | struct device_attribute *attr, char *buf) | |
398 | { | |
399 | struct pci_dev *pdev = to_pci_dev(dev); | |
400 | return sprintf (buf, "%u\n", pdev->d3cold_allowed); | |
401 | } | |
402 | #endif | |
403 | ||
1789382a DD |
404 | #ifdef CONFIG_PCI_IOV |
405 | static ssize_t sriov_totalvfs_show(struct device *dev, | |
406 | struct device_attribute *attr, | |
407 | char *buf) | |
408 | { | |
409 | struct pci_dev *pdev = to_pci_dev(dev); | |
410 | ||
bff73156 | 411 | return sprintf(buf, "%u\n", pci_sriov_get_totalvfs(pdev)); |
1789382a DD |
412 | } |
413 | ||
414 | ||
415 | static ssize_t sriov_numvfs_show(struct device *dev, | |
416 | struct device_attribute *attr, | |
417 | char *buf) | |
418 | { | |
419 | struct pci_dev *pdev = to_pci_dev(dev); | |
420 | ||
6b136724 | 421 | return sprintf(buf, "%u\n", pdev->sriov->num_VFs); |
1789382a DD |
422 | } |
423 | ||
424 | /* | |
faa48a50 BH |
425 | * num_vfs > 0; number of VFs to enable |
426 | * num_vfs = 0; disable all VFs | |
1789382a DD |
427 | * |
428 | * Note: SRIOV spec doesn't allow partial VF | |
faa48a50 | 429 | * disable, so it's all or none. |
1789382a DD |
430 | */ |
431 | static ssize_t sriov_numvfs_store(struct device *dev, | |
432 | struct device_attribute *attr, | |
433 | const char *buf, size_t count) | |
434 | { | |
435 | struct pci_dev *pdev = to_pci_dev(dev); | |
faa48a50 BH |
436 | int ret; |
437 | u16 num_vfs; | |
1789382a | 438 | |
faa48a50 BH |
439 | ret = kstrtou16(buf, 0, &num_vfs); |
440 | if (ret < 0) | |
441 | return ret; | |
442 | ||
443 | if (num_vfs > pci_sriov_get_totalvfs(pdev)) | |
444 | return -ERANGE; | |
445 | ||
446 | if (num_vfs == pdev->sriov->num_VFs) | |
447 | return count; /* no change */ | |
1789382a DD |
448 | |
449 | /* is PF driver loaded w/callback */ | |
450 | if (!pdev->driver || !pdev->driver->sriov_configure) { | |
faa48a50 | 451 | dev_info(&pdev->dev, "Driver doesn't support SRIOV configuration via sysfs\n"); |
1789382a DD |
452 | return -ENOSYS; |
453 | } | |
454 | ||
faa48a50 BH |
455 | if (num_vfs == 0) { |
456 | /* disable VFs */ | |
457 | ret = pdev->driver->sriov_configure(pdev, 0); | |
458 | if (ret < 0) | |
459 | return ret; | |
460 | return count; | |
1789382a DD |
461 | } |
462 | ||
faa48a50 BH |
463 | /* enable VFs */ |
464 | if (pdev->sriov->num_VFs) { | |
465 | dev_warn(&pdev->dev, "%d VFs already enabled. Disable before enabling %d VFs\n", | |
466 | pdev->sriov->num_VFs, num_vfs); | |
467 | return -EBUSY; | |
1789382a DD |
468 | } |
469 | ||
faa48a50 BH |
470 | ret = pdev->driver->sriov_configure(pdev, num_vfs); |
471 | if (ret < 0) | |
472 | return ret; | |
1789382a | 473 | |
faa48a50 BH |
474 | if (ret != num_vfs) |
475 | dev_warn(&pdev->dev, "%d VFs requested; only %d enabled\n", | |
476 | num_vfs, ret); | |
477 | ||
478 | return count; | |
1789382a DD |
479 | } |
480 | ||
481 | static struct device_attribute sriov_totalvfs_attr = __ATTR_RO(sriov_totalvfs); | |
482 | static struct device_attribute sriov_numvfs_attr = | |
483 | __ATTR(sriov_numvfs, (S_IRUGO|S_IWUSR|S_IWGRP), | |
484 | sriov_numvfs_show, sriov_numvfs_store); | |
485 | #endif /* CONFIG_PCI_IOV */ | |
486 | ||
1da177e4 LT |
487 | struct device_attribute pci_dev_attrs[] = { |
488 | __ATTR_RO(resource), | |
489 | __ATTR_RO(vendor), | |
490 | __ATTR_RO(device), | |
491 | __ATTR_RO(subsystem_vendor), | |
492 | __ATTR_RO(subsystem_device), | |
493 | __ATTR_RO(class), | |
494 | __ATTR_RO(irq), | |
495 | __ATTR_RO(local_cpus), | |
39106dcf | 496 | __ATTR_RO(local_cpulist), |
9888549e | 497 | __ATTR_RO(modalias), |
81bb0e19 BG |
498 | #ifdef CONFIG_NUMA |
499 | __ATTR_RO(numa_node), | |
500 | #endif | |
bb965401 YL |
501 | __ATTR_RO(dma_mask_bits), |
502 | __ATTR_RO(consistent_dma_mask_bits), | |
9f125d30 | 503 | __ATTR(enable, 0600, is_enabled_show, is_enabled_store), |
bdee9d98 DT |
504 | __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR), |
505 | broken_parity_status_show,broken_parity_status_store), | |
fe97064c | 506 | __ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store), |
77c27c7b | 507 | __ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store), |
738a6396 | 508 | __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store), |
448bd857 HY |
509 | #if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI) |
510 | __ATTR(d3cold_allowed, 0644, d3cold_allowed_show, d3cold_allowed_store), | |
77c27c7b | 511 | #endif |
1da177e4 LT |
512 | __ATTR_NULL, |
513 | }; | |
514 | ||
b9d320fc | 515 | struct device_attribute pcibus_dev_attrs[] = { |
b9d320fc | 516 | __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store), |
dc2c2c9d YL |
517 | __ATTR(cpuaffinity, S_IRUGO, pci_bus_show_cpumaskaffinity, NULL), |
518 | __ATTR(cpulistaffinity, S_IRUGO, pci_bus_show_cpulistaffinity, NULL), | |
b9d320fc YL |
519 | __ATTR_NULL, |
520 | }; | |
521 | ||
217f45de DA |
522 | static ssize_t |
523 | boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf) | |
524 | { | |
525 | struct pci_dev *pdev = to_pci_dev(dev); | |
1a39b310 MG |
526 | struct pci_dev *vga_dev = vga_default_device(); |
527 | ||
528 | if (vga_dev) | |
529 | return sprintf(buf, "%u\n", (pdev == vga_dev)); | |
217f45de DA |
530 | |
531 | return sprintf(buf, "%u\n", | |
532 | !!(pdev->resource[PCI_ROM_RESOURCE].flags & | |
533 | IORESOURCE_ROM_SHADOW)); | |
534 | } | |
535 | struct device_attribute vga_attr = __ATTR_RO(boot_vga); | |
536 | ||
1da177e4 | 537 | static ssize_t |
2c3c8bea CW |
538 | pci_read_config(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_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); | |
543 | unsigned int size = 64; | |
544 | loff_t init_off = off; | |
4c0619ad | 545 | u8 *data = (u8*) buf; |
1da177e4 LT |
546 | |
547 | /* Several chips lock up trying to read undefined config space */ | |
b7e724d3 | 548 | if (security_capable(filp->f_cred, &init_user_ns, CAP_SYS_ADMIN) == 0) { |
1da177e4 LT |
549 | size = dev->cfg_size; |
550 | } else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { | |
551 | size = 128; | |
552 | } | |
553 | ||
554 | if (off > size) | |
555 | return 0; | |
556 | if (off + count > size) { | |
557 | size -= off; | |
558 | count = size; | |
559 | } else { | |
560 | size = count; | |
561 | } | |
562 | ||
3d8387ef HY |
563 | pci_config_pm_runtime_get(dev); |
564 | ||
4c0619ad | 565 | if ((off & 1) && size) { |
566 | u8 val; | |
e04b0ea2 | 567 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 568 | data[off - init_off] = val; |
1da177e4 | 569 | off++; |
4c0619ad | 570 | size--; |
571 | } | |
572 | ||
573 | if ((off & 3) && size > 2) { | |
574 | u16 val; | |
e04b0ea2 | 575 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 576 | data[off - init_off] = val & 0xff; |
577 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
578 | off += 2; | |
579 | size -= 2; | |
1da177e4 LT |
580 | } |
581 | ||
582 | while (size > 3) { | |
4c0619ad | 583 | u32 val; |
e04b0ea2 | 584 | pci_user_read_config_dword(dev, off, &val); |
4c0619ad | 585 | data[off - init_off] = val & 0xff; |
586 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
587 | data[off - init_off + 2] = (val >> 16) & 0xff; | |
588 | data[off - init_off + 3] = (val >> 24) & 0xff; | |
1da177e4 LT |
589 | off += 4; |
590 | size -= 4; | |
591 | } | |
592 | ||
4c0619ad | 593 | if (size >= 2) { |
594 | u16 val; | |
e04b0ea2 | 595 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 596 | data[off - init_off] = val & 0xff; |
597 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
598 | off += 2; | |
599 | size -= 2; | |
600 | } | |
601 | ||
602 | if (size > 0) { | |
603 | u8 val; | |
e04b0ea2 | 604 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 605 | data[off - init_off] = val; |
1da177e4 LT |
606 | off++; |
607 | --size; | |
608 | } | |
609 | ||
3d8387ef HY |
610 | pci_config_pm_runtime_put(dev); |
611 | ||
1da177e4 LT |
612 | return count; |
613 | } | |
614 | ||
615 | static ssize_t | |
2c3c8bea CW |
616 | pci_write_config(struct file* filp, struct kobject *kobj, |
617 | struct bin_attribute *bin_attr, | |
91a69029 | 618 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
619 | { |
620 | struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); | |
621 | unsigned int size = count; | |
622 | loff_t init_off = off; | |
4c0619ad | 623 | u8 *data = (u8*) buf; |
1da177e4 LT |
624 | |
625 | if (off > dev->cfg_size) | |
626 | return 0; | |
627 | if (off + count > dev->cfg_size) { | |
628 | size = dev->cfg_size - off; | |
629 | count = size; | |
630 | } | |
4c0619ad | 631 | |
3d8387ef HY |
632 | pci_config_pm_runtime_get(dev); |
633 | ||
4c0619ad | 634 | if ((off & 1) && size) { |
e04b0ea2 | 635 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 | 636 | off++; |
4c0619ad | 637 | size--; |
1da177e4 | 638 | } |
4c0619ad | 639 | |
640 | if ((off & 3) && size > 2) { | |
641 | u16 val = data[off - init_off]; | |
642 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 643 | pci_user_write_config_word(dev, off, val); |
4c0619ad | 644 | off += 2; |
645 | size -= 2; | |
646 | } | |
1da177e4 LT |
647 | |
648 | while (size > 3) { | |
4c0619ad | 649 | u32 val = data[off - init_off]; |
650 | val |= (u32) data[off - init_off + 1] << 8; | |
651 | val |= (u32) data[off - init_off + 2] << 16; | |
652 | val |= (u32) data[off - init_off + 3] << 24; | |
e04b0ea2 | 653 | pci_user_write_config_dword(dev, off, val); |
1da177e4 LT |
654 | off += 4; |
655 | size -= 4; | |
656 | } | |
4c0619ad | 657 | |
658 | if (size >= 2) { | |
659 | u16 val = data[off - init_off]; | |
660 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 661 | pci_user_write_config_word(dev, off, val); |
4c0619ad | 662 | off += 2; |
663 | size -= 2; | |
664 | } | |
1da177e4 | 665 | |
4c0619ad | 666 | if (size) { |
e04b0ea2 | 667 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 LT |
668 | off++; |
669 | --size; | |
670 | } | |
671 | ||
3d8387ef HY |
672 | pci_config_pm_runtime_put(dev); |
673 | ||
1da177e4 LT |
674 | return count; |
675 | } | |
676 | ||
94e61088 | 677 | static ssize_t |
2c3c8bea CW |
678 | read_vpd_attr(struct file *filp, struct kobject *kobj, |
679 | struct bin_attribute *bin_attr, | |
287d19ce | 680 | char *buf, loff_t off, size_t count) |
94e61088 BH |
681 | { |
682 | struct pci_dev *dev = | |
683 | to_pci_dev(container_of(kobj, struct device, kobj)); | |
94e61088 BH |
684 | |
685 | if (off > bin_attr->size) | |
686 | count = 0; | |
687 | else if (count > bin_attr->size - off) | |
688 | count = bin_attr->size - off; | |
94e61088 | 689 | |
287d19ce | 690 | return pci_read_vpd(dev, off, count, buf); |
94e61088 BH |
691 | } |
692 | ||
693 | static ssize_t | |
2c3c8bea CW |
694 | write_vpd_attr(struct file *filp, struct kobject *kobj, |
695 | struct bin_attribute *bin_attr, | |
287d19ce | 696 | char *buf, loff_t off, size_t count) |
94e61088 BH |
697 | { |
698 | struct pci_dev *dev = | |
699 | to_pci_dev(container_of(kobj, struct device, kobj)); | |
94e61088 BH |
700 | |
701 | if (off > bin_attr->size) | |
702 | count = 0; | |
703 | else if (count > bin_attr->size - off) | |
704 | count = bin_attr->size - off; | |
94e61088 | 705 | |
287d19ce | 706 | return pci_write_vpd(dev, off, count, buf); |
94e61088 BH |
707 | } |
708 | ||
1da177e4 LT |
709 | #ifdef HAVE_PCI_LEGACY |
710 | /** | |
711 | * pci_read_legacy_io - read byte(s) from legacy I/O port space | |
2c3c8bea | 712 | * @filp: open sysfs file |
1da177e4 | 713 | * @kobj: kobject corresponding to file to read from |
cffb2faf | 714 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
715 | * @buf: buffer to store results |
716 | * @off: offset into legacy I/O port space | |
717 | * @count: number of bytes to read | |
718 | * | |
719 | * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
720 | * callback routine (pci_legacy_read). | |
721 | */ | |
f19aeb1f | 722 | static ssize_t |
2c3c8bea CW |
723 | pci_read_legacy_io(struct file *filp, struct kobject *kobj, |
724 | struct bin_attribute *bin_attr, | |
91a69029 | 725 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
726 | { |
727 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 728 | struct device, |
1da177e4 LT |
729 | kobj)); |
730 | ||
731 | /* Only support 1, 2 or 4 byte accesses */ | |
732 | if (count != 1 && count != 2 && count != 4) | |
733 | return -EINVAL; | |
734 | ||
735 | return pci_legacy_read(bus, off, (u32 *)buf, count); | |
736 | } | |
737 | ||
738 | /** | |
739 | * pci_write_legacy_io - write byte(s) to legacy I/O port space | |
2c3c8bea | 740 | * @filp: open sysfs file |
1da177e4 | 741 | * @kobj: kobject corresponding to file to read from |
cffb2faf | 742 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
743 | * @buf: buffer containing value to be written |
744 | * @off: offset into legacy I/O port space | |
745 | * @count: number of bytes to write | |
746 | * | |
747 | * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
748 | * callback routine (pci_legacy_write). | |
749 | */ | |
f19aeb1f | 750 | static ssize_t |
2c3c8bea CW |
751 | pci_write_legacy_io(struct file *filp, struct kobject *kobj, |
752 | struct bin_attribute *bin_attr, | |
91a69029 | 753 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
754 | { |
755 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 756 | struct device, |
1da177e4 LT |
757 | kobj)); |
758 | /* Only support 1, 2 or 4 byte accesses */ | |
759 | if (count != 1 && count != 2 && count != 4) | |
760 | return -EINVAL; | |
761 | ||
762 | return pci_legacy_write(bus, off, *(u32 *)buf, count); | |
763 | } | |
764 | ||
765 | /** | |
766 | * pci_mmap_legacy_mem - map legacy PCI memory into user memory space | |
2c3c8bea | 767 | * @filp: open sysfs file |
1da177e4 LT |
768 | * @kobj: kobject corresponding to device to be mapped |
769 | * @attr: struct bin_attribute for this file | |
770 | * @vma: struct vm_area_struct passed to mmap | |
771 | * | |
f19aeb1f | 772 | * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap |
1da177e4 LT |
773 | * legacy memory space (first meg of bus space) into application virtual |
774 | * memory space. | |
775 | */ | |
f19aeb1f | 776 | static int |
2c3c8bea CW |
777 | pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj, |
778 | struct bin_attribute *attr, | |
1da177e4 LT |
779 | struct vm_area_struct *vma) |
780 | { | |
781 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 782 | struct device, |
1da177e4 LT |
783 | kobj)); |
784 | ||
f19aeb1f BH |
785 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem); |
786 | } | |
787 | ||
788 | /** | |
789 | * pci_mmap_legacy_io - map legacy PCI IO into user memory space | |
2c3c8bea | 790 | * @filp: open sysfs file |
f19aeb1f BH |
791 | * @kobj: kobject corresponding to device to be mapped |
792 | * @attr: struct bin_attribute for this file | |
793 | * @vma: struct vm_area_struct passed to mmap | |
794 | * | |
795 | * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap | |
796 | * legacy IO space (first meg of bus space) into application virtual | |
797 | * memory space. Returns -ENOSYS if the operation isn't supported | |
798 | */ | |
799 | static int | |
2c3c8bea CW |
800 | pci_mmap_legacy_io(struct file *filp, struct kobject *kobj, |
801 | struct bin_attribute *attr, | |
f19aeb1f BH |
802 | struct vm_area_struct *vma) |
803 | { | |
804 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
805 | struct device, | |
806 | kobj)); | |
807 | ||
808 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io); | |
809 | } | |
810 | ||
10a0ef39 IK |
811 | /** |
812 | * pci_adjust_legacy_attr - adjustment of legacy file attributes | |
813 | * @b: bus to create files under | |
814 | * @mmap_type: I/O port or memory | |
815 | * | |
816 | * Stub implementation. Can be overridden by arch if necessary. | |
817 | */ | |
818 | void __weak | |
819 | pci_adjust_legacy_attr(struct pci_bus *b, enum pci_mmap_state mmap_type) | |
820 | { | |
821 | return; | |
822 | } | |
823 | ||
f19aeb1f BH |
824 | /** |
825 | * pci_create_legacy_files - create legacy I/O port and memory files | |
826 | * @b: bus to create files under | |
827 | * | |
828 | * Some platforms allow access to legacy I/O port and ISA memory space on | |
829 | * a per-bus basis. This routine creates the files and ties them into | |
830 | * their associated read, write and mmap files from pci-sysfs.c | |
831 | * | |
25985edc | 832 | * On error unwind, but don't propagate the error to the caller |
f19aeb1f BH |
833 | * as it is ok to set up the PCI bus without these files. |
834 | */ | |
835 | void pci_create_legacy_files(struct pci_bus *b) | |
836 | { | |
837 | int error; | |
838 | ||
839 | b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2, | |
840 | GFP_ATOMIC); | |
841 | if (!b->legacy_io) | |
842 | goto kzalloc_err; | |
843 | ||
62e877b8 | 844 | sysfs_bin_attr_init(b->legacy_io); |
f19aeb1f BH |
845 | b->legacy_io->attr.name = "legacy_io"; |
846 | b->legacy_io->size = 0xffff; | |
847 | b->legacy_io->attr.mode = S_IRUSR | S_IWUSR; | |
848 | b->legacy_io->read = pci_read_legacy_io; | |
849 | b->legacy_io->write = pci_write_legacy_io; | |
850 | b->legacy_io->mmap = pci_mmap_legacy_io; | |
10a0ef39 | 851 | pci_adjust_legacy_attr(b, pci_mmap_io); |
f19aeb1f BH |
852 | error = device_create_bin_file(&b->dev, b->legacy_io); |
853 | if (error) | |
854 | goto legacy_io_err; | |
855 | ||
856 | /* Allocated above after the legacy_io struct */ | |
857 | b->legacy_mem = b->legacy_io + 1; | |
6757eca3 | 858 | sysfs_bin_attr_init(b->legacy_mem); |
f19aeb1f BH |
859 | b->legacy_mem->attr.name = "legacy_mem"; |
860 | b->legacy_mem->size = 1024*1024; | |
861 | b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR; | |
862 | b->legacy_mem->mmap = pci_mmap_legacy_mem; | |
10a0ef39 | 863 | pci_adjust_legacy_attr(b, pci_mmap_mem); |
f19aeb1f BH |
864 | error = device_create_bin_file(&b->dev, b->legacy_mem); |
865 | if (error) | |
866 | goto legacy_mem_err; | |
867 | ||
868 | return; | |
869 | ||
870 | legacy_mem_err: | |
871 | device_remove_bin_file(&b->dev, b->legacy_io); | |
872 | legacy_io_err: | |
873 | kfree(b->legacy_io); | |
874 | b->legacy_io = NULL; | |
875 | kzalloc_err: | |
876 | printk(KERN_WARNING "pci: warning: could not create legacy I/O port " | |
877 | "and ISA memory resources to sysfs\n"); | |
878 | return; | |
879 | } | |
880 | ||
881 | void pci_remove_legacy_files(struct pci_bus *b) | |
882 | { | |
883 | if (b->legacy_io) { | |
884 | device_remove_bin_file(&b->dev, b->legacy_io); | |
885 | device_remove_bin_file(&b->dev, b->legacy_mem); | |
886 | kfree(b->legacy_io); /* both are allocated here */ | |
887 | } | |
1da177e4 LT |
888 | } |
889 | #endif /* HAVE_PCI_LEGACY */ | |
890 | ||
891 | #ifdef HAVE_PCI_MMAP | |
b5ff7df3 | 892 | |
3b519e4e MW |
893 | int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma, |
894 | enum pci_mmap_api mmap_api) | |
b5ff7df3 | 895 | { |
3b519e4e | 896 | unsigned long nr, start, size, pci_start; |
b5ff7df3 | 897 | |
3b519e4e MW |
898 | if (pci_resource_len(pdev, resno) == 0) |
899 | return 0; | |
b5ff7df3 LT |
900 | nr = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; |
901 | start = vma->vm_pgoff; | |
88e7df0b | 902 | size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1; |
8c05cd08 | 903 | pci_start = (mmap_api == PCI_MMAP_PROCFS) ? |
3b519e4e MW |
904 | pci_resource_start(pdev, resno) >> PAGE_SHIFT : 0; |
905 | if (start >= pci_start && start < pci_start + size && | |
906 | start + nr <= pci_start + size) | |
b5ff7df3 | 907 | return 1; |
b5ff7df3 LT |
908 | return 0; |
909 | } | |
910 | ||
1da177e4 LT |
911 | /** |
912 | * pci_mmap_resource - map a PCI resource into user memory space | |
913 | * @kobj: kobject for mapping | |
914 | * @attr: struct bin_attribute for the file being mapped | |
915 | * @vma: struct vm_area_struct passed into the mmap | |
45aec1ae | 916 | * @write_combine: 1 for write_combine mapping |
1da177e4 LT |
917 | * |
918 | * Use the regular PCI mapping routines to map a PCI resource into userspace. | |
1da177e4 LT |
919 | */ |
920 | static int | |
921 | pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr, | |
45aec1ae | 922 | struct vm_area_struct *vma, int write_combine) |
1da177e4 LT |
923 | { |
924 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, | |
925 | struct device, kobj)); | |
a3f5835a | 926 | struct resource *res = attr->private; |
1da177e4 | 927 | enum pci_mmap_state mmap_type; |
e31dd6e4 | 928 | resource_size_t start, end; |
2311b1f2 | 929 | int i; |
1da177e4 | 930 | |
2311b1f2 ME |
931 | for (i = 0; i < PCI_ROM_RESOURCE; i++) |
932 | if (res == &pdev->resource[i]) | |
933 | break; | |
934 | if (i >= PCI_ROM_RESOURCE) | |
935 | return -ENODEV; | |
936 | ||
3b519e4e MW |
937 | if (!pci_mmap_fits(pdev, i, vma, PCI_MMAP_SYSFS)) { |
938 | WARN(1, "process \"%s\" tried to map 0x%08lx bytes " | |
939 | "at page 0x%08lx on %s BAR %d (start 0x%16Lx, size 0x%16Lx)\n", | |
940 | current->comm, vma->vm_end-vma->vm_start, vma->vm_pgoff, | |
941 | pci_name(pdev), i, | |
e25cd062 RD |
942 | (u64)pci_resource_start(pdev, i), |
943 | (u64)pci_resource_len(pdev, i)); | |
b5ff7df3 | 944 | return -EINVAL; |
3b519e4e | 945 | } |
b5ff7df3 | 946 | |
2311b1f2 ME |
947 | /* pci_mmap_page_range() expects the same kind of entry as coming |
948 | * from /proc/bus/pci/ which is a "user visible" value. If this is | |
949 | * different from the resource itself, arch will do necessary fixup. | |
950 | */ | |
951 | pci_resource_to_user(pdev, i, res, &start, &end); | |
952 | vma->vm_pgoff += start >> PAGE_SHIFT; | |
1da177e4 LT |
953 | mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io; |
954 | ||
e8de1481 AV |
955 | if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(start)) |
956 | return -EINVAL; | |
957 | ||
45aec1ae | 958 | return pci_mmap_page_range(pdev, vma, mmap_type, write_combine); |
959 | } | |
960 | ||
961 | static int | |
2c3c8bea CW |
962 | pci_mmap_resource_uc(struct file *filp, struct kobject *kobj, |
963 | struct bin_attribute *attr, | |
45aec1ae | 964 | struct vm_area_struct *vma) |
965 | { | |
966 | return pci_mmap_resource(kobj, attr, vma, 0); | |
967 | } | |
968 | ||
969 | static int | |
2c3c8bea CW |
970 | pci_mmap_resource_wc(struct file *filp, struct kobject *kobj, |
971 | struct bin_attribute *attr, | |
45aec1ae | 972 | struct vm_area_struct *vma) |
973 | { | |
974 | return pci_mmap_resource(kobj, attr, vma, 1); | |
1da177e4 LT |
975 | } |
976 | ||
8633328b AW |
977 | static ssize_t |
978 | pci_resource_io(struct file *filp, struct kobject *kobj, | |
979 | struct bin_attribute *attr, char *buf, | |
980 | loff_t off, size_t count, bool write) | |
981 | { | |
982 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, | |
983 | struct device, kobj)); | |
984 | struct resource *res = attr->private; | |
985 | unsigned long port = off; | |
986 | int i; | |
987 | ||
988 | for (i = 0; i < PCI_ROM_RESOURCE; i++) | |
989 | if (res == &pdev->resource[i]) | |
990 | break; | |
991 | if (i >= PCI_ROM_RESOURCE) | |
992 | return -ENODEV; | |
993 | ||
994 | port += pci_resource_start(pdev, i); | |
995 | ||
996 | if (port > pci_resource_end(pdev, i)) | |
997 | return 0; | |
998 | ||
999 | if (port + count - 1 > pci_resource_end(pdev, i)) | |
1000 | return -EINVAL; | |
1001 | ||
1002 | switch (count) { | |
1003 | case 1: | |
1004 | if (write) | |
1005 | outb(*(u8 *)buf, port); | |
1006 | else | |
1007 | *(u8 *)buf = inb(port); | |
1008 | return 1; | |
1009 | case 2: | |
1010 | if (write) | |
1011 | outw(*(u16 *)buf, port); | |
1012 | else | |
1013 | *(u16 *)buf = inw(port); | |
1014 | return 2; | |
1015 | case 4: | |
1016 | if (write) | |
1017 | outl(*(u32 *)buf, port); | |
1018 | else | |
1019 | *(u32 *)buf = inl(port); | |
1020 | return 4; | |
1021 | } | |
1022 | return -EINVAL; | |
1023 | } | |
1024 | ||
1025 | static ssize_t | |
1026 | pci_read_resource_io(struct file *filp, struct kobject *kobj, | |
1027 | struct bin_attribute *attr, char *buf, | |
1028 | loff_t off, size_t count) | |
1029 | { | |
1030 | return pci_resource_io(filp, kobj, attr, buf, off, count, false); | |
1031 | } | |
1032 | ||
1033 | static ssize_t | |
1034 | pci_write_resource_io(struct file *filp, struct kobject *kobj, | |
1035 | struct bin_attribute *attr, char *buf, | |
1036 | loff_t off, size_t count) | |
1037 | { | |
1038 | return pci_resource_io(filp, kobj, attr, buf, off, count, true); | |
1039 | } | |
1040 | ||
b19441af GKH |
1041 | /** |
1042 | * pci_remove_resource_files - cleanup resource files | |
cffb2faf | 1043 | * @pdev: dev to cleanup |
b19441af | 1044 | * |
cffb2faf | 1045 | * If we created resource files for @pdev, remove them from sysfs and |
b19441af GKH |
1046 | * free their resources. |
1047 | */ | |
1048 | static void | |
1049 | pci_remove_resource_files(struct pci_dev *pdev) | |
1050 | { | |
1051 | int i; | |
1052 | ||
1053 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
1054 | struct bin_attribute *res_attr; | |
1055 | ||
1056 | res_attr = pdev->res_attr[i]; | |
1057 | if (res_attr) { | |
1058 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
1059 | kfree(res_attr); | |
1060 | } | |
45aec1ae | 1061 | |
1062 | res_attr = pdev->res_attr_wc[i]; | |
1063 | if (res_attr) { | |
1064 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
1065 | kfree(res_attr); | |
1066 | } | |
b19441af GKH |
1067 | } |
1068 | } | |
1069 | ||
45aec1ae | 1070 | static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine) |
1071 | { | |
1072 | /* allocate attribute structure, piggyback attribute name */ | |
1073 | int name_len = write_combine ? 13 : 10; | |
1074 | struct bin_attribute *res_attr; | |
1075 | int retval; | |
1076 | ||
1077 | res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC); | |
1078 | if (res_attr) { | |
1079 | char *res_attr_name = (char *)(res_attr + 1); | |
1080 | ||
a07e4156 | 1081 | sysfs_bin_attr_init(res_attr); |
45aec1ae | 1082 | if (write_combine) { |
1083 | pdev->res_attr_wc[num] = res_attr; | |
1084 | sprintf(res_attr_name, "resource%d_wc", num); | |
1085 | res_attr->mmap = pci_mmap_resource_wc; | |
1086 | } else { | |
1087 | pdev->res_attr[num] = res_attr; | |
1088 | sprintf(res_attr_name, "resource%d", num); | |
1089 | res_attr->mmap = pci_mmap_resource_uc; | |
1090 | } | |
8633328b AW |
1091 | if (pci_resource_flags(pdev, num) & IORESOURCE_IO) { |
1092 | res_attr->read = pci_read_resource_io; | |
1093 | res_attr->write = pci_write_resource_io; | |
1094 | } | |
45aec1ae | 1095 | res_attr->attr.name = res_attr_name; |
1096 | res_attr->attr.mode = S_IRUSR | S_IWUSR; | |
1097 | res_attr->size = pci_resource_len(pdev, num); | |
1098 | res_attr->private = &pdev->resource[num]; | |
1099 | retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr); | |
1100 | } else | |
1101 | retval = -ENOMEM; | |
1102 | ||
1103 | return retval; | |
1104 | } | |
1105 | ||
1da177e4 LT |
1106 | /** |
1107 | * pci_create_resource_files - create resource files in sysfs for @dev | |
cffb2faf | 1108 | * @pdev: dev in question |
1da177e4 | 1109 | * |
cffb2faf | 1110 | * Walk the resources in @pdev creating files for each resource available. |
1da177e4 | 1111 | */ |
b19441af | 1112 | static int pci_create_resource_files(struct pci_dev *pdev) |
1da177e4 LT |
1113 | { |
1114 | int i; | |
b19441af | 1115 | int retval; |
1da177e4 LT |
1116 | |
1117 | /* Expose the PCI resources from this device as files */ | |
1118 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
1da177e4 LT |
1119 | |
1120 | /* skip empty resources */ | |
1121 | if (!pci_resource_len(pdev, i)) | |
1122 | continue; | |
1123 | ||
45aec1ae | 1124 | retval = pci_create_attr(pdev, i, 0); |
1125 | /* for prefetchable resources, create a WC mappable file */ | |
1126 | if (!retval && pdev->resource[i].flags & IORESOURCE_PREFETCH) | |
1127 | retval = pci_create_attr(pdev, i, 1); | |
1128 | ||
1129 | if (retval) { | |
1130 | pci_remove_resource_files(pdev); | |
1131 | return retval; | |
1da177e4 LT |
1132 | } |
1133 | } | |
b19441af | 1134 | return 0; |
1da177e4 LT |
1135 | } |
1136 | #else /* !HAVE_PCI_MMAP */ | |
10a0ef39 IK |
1137 | int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; } |
1138 | void __weak pci_remove_resource_files(struct pci_dev *dev) { return; } | |
1da177e4 LT |
1139 | #endif /* HAVE_PCI_MMAP */ |
1140 | ||
1141 | /** | |
1142 | * pci_write_rom - used to enable access to the PCI ROM display | |
2c3c8bea | 1143 | * @filp: sysfs file |
1da177e4 | 1144 | * @kobj: kernel object handle |
cffb2faf | 1145 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
1146 | * @buf: user input |
1147 | * @off: file offset | |
1148 | * @count: number of byte in input | |
1149 | * | |
1150 | * writing anything except 0 enables it | |
1151 | */ | |
1152 | static ssize_t | |
2c3c8bea CW |
1153 | pci_write_rom(struct file *filp, struct kobject *kobj, |
1154 | struct bin_attribute *bin_attr, | |
91a69029 | 1155 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
1156 | { |
1157 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj)); | |
1158 | ||
1159 | if ((off == 0) && (*buf == '0') && (count == 2)) | |
1160 | pdev->rom_attr_enabled = 0; | |
1161 | else | |
1162 | pdev->rom_attr_enabled = 1; | |
1163 | ||
1164 | return count; | |
1165 | } | |
1166 | ||
1167 | /** | |
1168 | * pci_read_rom - read a PCI ROM | |
2c3c8bea | 1169 | * @filp: sysfs file |
1da177e4 | 1170 | * @kobj: kernel object handle |
cffb2faf | 1171 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
1172 | * @buf: where to put the data we read from the ROM |
1173 | * @off: file offset | |
1174 | * @count: number of bytes to read | |
1175 | * | |
1176 | * Put @count bytes starting at @off into @buf from the ROM in the PCI | |
1177 | * device corresponding to @kobj. | |
1178 | */ | |
1179 | static ssize_t | |
2c3c8bea CW |
1180 | pci_read_rom(struct file *filp, struct kobject *kobj, |
1181 | struct bin_attribute *bin_attr, | |
91a69029 | 1182 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
1183 | { |
1184 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj)); | |
1185 | void __iomem *rom; | |
1186 | size_t size; | |
1187 | ||
1188 | if (!pdev->rom_attr_enabled) | |
1189 | return -EINVAL; | |
1190 | ||
1191 | rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */ | |
97c44836 TN |
1192 | if (!rom || !size) |
1193 | return -EIO; | |
1da177e4 LT |
1194 | |
1195 | if (off >= size) | |
1196 | count = 0; | |
1197 | else { | |
1198 | if (off + count > size) | |
1199 | count = size - off; | |
1200 | ||
1201 | memcpy_fromio(buf, rom + off, count); | |
1202 | } | |
1203 | pci_unmap_rom(pdev, rom); | |
1204 | ||
1205 | return count; | |
1206 | } | |
1207 | ||
1208 | static struct bin_attribute pci_config_attr = { | |
1209 | .attr = { | |
1210 | .name = "config", | |
1211 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 1212 | }, |
557848c3 | 1213 | .size = PCI_CFG_SPACE_SIZE, |
1da177e4 LT |
1214 | .read = pci_read_config, |
1215 | .write = pci_write_config, | |
1216 | }; | |
1217 | ||
1218 | static struct bin_attribute pcie_config_attr = { | |
1219 | .attr = { | |
1220 | .name = "config", | |
1221 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 1222 | }, |
557848c3 | 1223 | .size = PCI_CFG_SPACE_EXP_SIZE, |
1da177e4 LT |
1224 | .read = pci_read_config, |
1225 | .write = pci_write_config, | |
1226 | }; | |
1227 | ||
d6d88c83 | 1228 | int __weak pcibios_add_platform_entries(struct pci_dev *dev) |
575e3348 | 1229 | { |
a2cd52ca | 1230 | return 0; |
575e3348 ME |
1231 | } |
1232 | ||
711d5779 MT |
1233 | static ssize_t reset_store(struct device *dev, |
1234 | struct device_attribute *attr, const char *buf, | |
1235 | size_t count) | |
1236 | { | |
1237 | struct pci_dev *pdev = to_pci_dev(dev); | |
1238 | unsigned long val; | |
1239 | ssize_t result = strict_strtoul(buf, 0, &val); | |
1240 | ||
1241 | if (result < 0) | |
1242 | return result; | |
1243 | ||
1244 | if (val != 1) | |
1245 | return -EINVAL; | |
447c5dd7 MS |
1246 | |
1247 | result = pci_reset_function(pdev); | |
1248 | if (result < 0) | |
1249 | return result; | |
1250 | ||
1251 | return count; | |
711d5779 MT |
1252 | } |
1253 | ||
1254 | static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store); | |
1255 | ||
280c73d3 ZY |
1256 | static int pci_create_capabilities_sysfs(struct pci_dev *dev) |
1257 | { | |
1258 | int retval; | |
1259 | struct bin_attribute *attr; | |
1260 | ||
1261 | /* If the device has VPD, try to expose it in sysfs. */ | |
1262 | if (dev->vpd) { | |
1263 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); | |
1264 | if (!attr) | |
1265 | return -ENOMEM; | |
1266 | ||
a07e4156 | 1267 | sysfs_bin_attr_init(attr); |
280c73d3 ZY |
1268 | attr->size = dev->vpd->len; |
1269 | attr->attr.name = "vpd"; | |
1270 | attr->attr.mode = S_IRUSR | S_IWUSR; | |
287d19ce SH |
1271 | attr->read = read_vpd_attr; |
1272 | attr->write = write_vpd_attr; | |
280c73d3 ZY |
1273 | retval = sysfs_create_bin_file(&dev->dev.kobj, attr); |
1274 | if (retval) { | |
0f12a4e2 | 1275 | kfree(attr); |
280c73d3 ZY |
1276 | return retval; |
1277 | } | |
1278 | dev->vpd->attr = attr; | |
1279 | } | |
1280 | ||
1281 | /* Active State Power Management */ | |
1282 | pcie_aspm_create_sysfs_dev_files(dev); | |
1283 | ||
711d5779 MT |
1284 | if (!pci_probe_reset_function(dev)) { |
1285 | retval = device_create_file(&dev->dev, &reset_attr); | |
1286 | if (retval) | |
1287 | goto error; | |
1288 | dev->reset_fn = 1; | |
1289 | } | |
280c73d3 | 1290 | return 0; |
711d5779 MT |
1291 | |
1292 | error: | |
1293 | pcie_aspm_remove_sysfs_dev_files(dev); | |
1294 | if (dev->vpd && dev->vpd->attr) { | |
1295 | sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr); | |
1296 | kfree(dev->vpd->attr); | |
1297 | } | |
1298 | ||
1299 | return retval; | |
280c73d3 ZY |
1300 | } |
1301 | ||
b19441af | 1302 | int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev) |
1da177e4 | 1303 | { |
b19441af | 1304 | int retval; |
280c73d3 ZY |
1305 | int rom_size = 0; |
1306 | struct bin_attribute *attr; | |
b19441af | 1307 | |
1da177e4 LT |
1308 | if (!sysfs_initialized) |
1309 | return -EACCES; | |
1310 | ||
557848c3 | 1311 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
b19441af | 1312 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1da177e4 | 1313 | else |
b19441af GKH |
1314 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
1315 | if (retval) | |
1316 | goto err; | |
1da177e4 | 1317 | |
b19441af GKH |
1318 | retval = pci_create_resource_files(pdev); |
1319 | if (retval) | |
280c73d3 ZY |
1320 | goto err_config_file; |
1321 | ||
1322 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) | |
1323 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); | |
1324 | else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW) | |
1325 | rom_size = 0x20000; | |
1da177e4 LT |
1326 | |
1327 | /* If the device has a ROM, try to expose it in sysfs. */ | |
280c73d3 | 1328 | if (rom_size) { |
94e61088 | 1329 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); |
280c73d3 | 1330 | if (!attr) { |
b19441af | 1331 | retval = -ENOMEM; |
9890b12a | 1332 | goto err_resource_files; |
1da177e4 | 1333 | } |
a07e4156 | 1334 | sysfs_bin_attr_init(attr); |
280c73d3 ZY |
1335 | attr->size = rom_size; |
1336 | attr->attr.name = "rom"; | |
ff29530e | 1337 | attr->attr.mode = S_IRUSR | S_IWUSR; |
280c73d3 ZY |
1338 | attr->read = pci_read_rom; |
1339 | attr->write = pci_write_rom; | |
1340 | retval = sysfs_create_bin_file(&pdev->dev.kobj, attr); | |
1341 | if (retval) { | |
1342 | kfree(attr); | |
1343 | goto err_resource_files; | |
1344 | } | |
1345 | pdev->rom_attr = attr; | |
1da177e4 | 1346 | } |
280c73d3 | 1347 | |
1da177e4 | 1348 | /* add platform-specific attributes */ |
280c73d3 ZY |
1349 | retval = pcibios_add_platform_entries(pdev); |
1350 | if (retval) | |
625e1d59 | 1351 | goto err_rom_file; |
b19441af | 1352 | |
280c73d3 ZY |
1353 | /* add sysfs entries for various capabilities */ |
1354 | retval = pci_create_capabilities_sysfs(pdev); | |
1355 | if (retval) | |
625e1d59 | 1356 | goto err_rom_file; |
7d715a6c | 1357 | |
911e1c9b N |
1358 | pci_create_firmware_label_files(pdev); |
1359 | ||
1da177e4 | 1360 | return 0; |
b19441af | 1361 | |
a2cd52ca | 1362 | err_rom_file: |
280c73d3 | 1363 | if (rom_size) { |
94e61088 | 1364 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); |
280c73d3 ZY |
1365 | kfree(pdev->rom_attr); |
1366 | pdev->rom_attr = NULL; | |
1367 | } | |
9890b12a ME |
1368 | err_resource_files: |
1369 | pci_remove_resource_files(pdev); | |
94e61088 | 1370 | err_config_file: |
557848c3 | 1371 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
b19441af GKH |
1372 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1373 | else | |
1374 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); | |
1375 | err: | |
1376 | return retval; | |
1da177e4 LT |
1377 | } |
1378 | ||
280c73d3 ZY |
1379 | static void pci_remove_capabilities_sysfs(struct pci_dev *dev) |
1380 | { | |
1381 | if (dev->vpd && dev->vpd->attr) { | |
1382 | sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr); | |
1383 | kfree(dev->vpd->attr); | |
1384 | } | |
1385 | ||
1386 | pcie_aspm_remove_sysfs_dev_files(dev); | |
711d5779 MT |
1387 | if (dev->reset_fn) { |
1388 | device_remove_file(&dev->dev, &reset_attr); | |
1389 | dev->reset_fn = 0; | |
1390 | } | |
280c73d3 ZY |
1391 | } |
1392 | ||
1da177e4 LT |
1393 | /** |
1394 | * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files | |
1395 | * @pdev: device whose entries we should free | |
1396 | * | |
1397 | * Cleanup when @pdev is removed from sysfs. | |
1398 | */ | |
1399 | void pci_remove_sysfs_dev_files(struct pci_dev *pdev) | |
1400 | { | |
280c73d3 ZY |
1401 | int rom_size = 0; |
1402 | ||
d67afe5e DM |
1403 | if (!sysfs_initialized) |
1404 | return; | |
1405 | ||
280c73d3 | 1406 | pci_remove_capabilities_sysfs(pdev); |
7d715a6c | 1407 | |
557848c3 | 1408 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
1da177e4 LT |
1409 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1410 | else | |
1411 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); | |
1412 | ||
1413 | pci_remove_resource_files(pdev); | |
1414 | ||
280c73d3 ZY |
1415 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) |
1416 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); | |
1417 | else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW) | |
1418 | rom_size = 0x20000; | |
1419 | ||
1420 | if (rom_size && pdev->rom_attr) { | |
1421 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); | |
1422 | kfree(pdev->rom_attr); | |
1da177e4 | 1423 | } |
911e1c9b N |
1424 | |
1425 | pci_remove_firmware_label_files(pdev); | |
1426 | ||
1da177e4 LT |
1427 | } |
1428 | ||
1429 | static int __init pci_sysfs_init(void) | |
1430 | { | |
1431 | struct pci_dev *pdev = NULL; | |
b19441af GKH |
1432 | int retval; |
1433 | ||
1da177e4 | 1434 | sysfs_initialized = 1; |
b19441af GKH |
1435 | for_each_pci_dev(pdev) { |
1436 | retval = pci_create_sysfs_dev_files(pdev); | |
151fc5df JL |
1437 | if (retval) { |
1438 | pci_dev_put(pdev); | |
b19441af | 1439 | return retval; |
151fc5df | 1440 | } |
b19441af | 1441 | } |
1da177e4 LT |
1442 | |
1443 | return 0; | |
1444 | } | |
1445 | ||
40ee9e9f | 1446 | late_initcall(pci_sysfs_init); |
4e15c46b YL |
1447 | |
1448 | static struct attribute *pci_dev_dev_attrs[] = { | |
625e1d59 | 1449 | &vga_attr.attr, |
4e15c46b YL |
1450 | NULL, |
1451 | }; | |
1452 | ||
1453 | static umode_t pci_dev_attrs_are_visible(struct kobject *kobj, | |
1454 | struct attribute *a, int n) | |
1455 | { | |
625e1d59 YL |
1456 | struct device *dev = container_of(kobj, struct device, kobj); |
1457 | struct pci_dev *pdev = to_pci_dev(dev); | |
1458 | ||
1459 | if (a == &vga_attr.attr) | |
1460 | if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
1461 | return 0; | |
1462 | ||
4e15c46b YL |
1463 | return a->mode; |
1464 | } | |
1465 | ||
1789382a DD |
1466 | #ifdef CONFIG_PCI_IOV |
1467 | static struct attribute *sriov_dev_attrs[] = { | |
1468 | &sriov_totalvfs_attr.attr, | |
1469 | &sriov_numvfs_attr.attr, | |
1470 | NULL, | |
1471 | }; | |
1472 | ||
1473 | static umode_t sriov_attrs_are_visible(struct kobject *kobj, | |
1474 | struct attribute *a, int n) | |
1475 | { | |
1476 | struct device *dev = container_of(kobj, struct device, kobj); | |
1477 | ||
1478 | if (!dev_is_pf(dev)) | |
1479 | return 0; | |
1480 | ||
1481 | return a->mode; | |
1482 | } | |
1483 | ||
1484 | static struct attribute_group sriov_dev_attr_group = { | |
1485 | .attrs = sriov_dev_attrs, | |
1486 | .is_visible = sriov_attrs_are_visible, | |
1487 | }; | |
1488 | #endif /* CONFIG_PCI_IOV */ | |
1489 | ||
4e15c46b YL |
1490 | static struct attribute_group pci_dev_attr_group = { |
1491 | .attrs = pci_dev_dev_attrs, | |
1492 | .is_visible = pci_dev_attrs_are_visible, | |
1493 | }; | |
1494 | ||
1495 | static const struct attribute_group *pci_dev_attr_groups[] = { | |
1496 | &pci_dev_attr_group, | |
1789382a DD |
1497 | #ifdef CONFIG_PCI_IOV |
1498 | &sriov_dev_attr_group, | |
1499 | #endif | |
4e15c46b YL |
1500 | NULL, |
1501 | }; | |
1502 | ||
1503 | struct device_type pci_dev_type = { | |
1504 | .groups = pci_dev_attr_groups, | |
1505 | }; |