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 | * | |
f7625980 | 13 | * Modeled after usb's driverfs.c |
1da177e4 LT |
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> |
dfc73e7a | 32 | #include <linux/of.h> |
1da177e4 LT |
33 | #include "pci.h" |
34 | ||
35 | static int sysfs_initialized; /* = 0 */ | |
36 | ||
37 | /* show configuration fields */ | |
38 | #define pci_config_attr(field, format_string) \ | |
39 | static ssize_t \ | |
e404e274 | 40 | field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
41 | { \ |
42 | struct pci_dev *pdev; \ | |
43 | \ | |
3c78bc61 RD |
44 | pdev = to_pci_dev(dev); \ |
45 | return sprintf(buf, format_string, pdev->field); \ | |
5136b2da GKH |
46 | } \ |
47 | static DEVICE_ATTR_RO(field) | |
1da177e4 LT |
48 | |
49 | pci_config_attr(vendor, "0x%04x\n"); | |
50 | pci_config_attr(device, "0x%04x\n"); | |
51 | pci_config_attr(subsystem_vendor, "0x%04x\n"); | |
52 | pci_config_attr(subsystem_device, "0x%04x\n"); | |
702ed3be | 53 | pci_config_attr(revision, "0x%02x\n"); |
1da177e4 LT |
54 | pci_config_attr(class, "0x%06x\n"); |
55 | pci_config_attr(irq, "%u\n"); | |
56 | ||
bdee9d98 DT |
57 | static ssize_t broken_parity_status_show(struct device *dev, |
58 | struct device_attribute *attr, | |
59 | char *buf) | |
60 | { | |
61 | struct pci_dev *pdev = to_pci_dev(dev); | |
3c78bc61 | 62 | return sprintf(buf, "%u\n", pdev->broken_parity_status); |
bdee9d98 DT |
63 | } |
64 | ||
65 | static ssize_t broken_parity_status_store(struct device *dev, | |
66 | struct device_attribute *attr, | |
67 | const char *buf, size_t count) | |
68 | { | |
69 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 | 70 | unsigned long val; |
bdee9d98 | 71 | |
9a994e8e | 72 | if (kstrtoul(buf, 0, &val) < 0) |
92425a40 TP |
73 | return -EINVAL; |
74 | ||
75 | pdev->broken_parity_status = !!val; | |
76 | ||
77 | return count; | |
bdee9d98 | 78 | } |
5136b2da | 79 | static DEVICE_ATTR_RW(broken_parity_status); |
bdee9d98 | 80 | |
5aaba363 | 81 | static ssize_t pci_dev_show_local_cpu(struct device *dev, bool list, |
3c78bc61 | 82 | struct device_attribute *attr, char *buf) |
c489f5fb | 83 | { |
3be83050 | 84 | const struct cpumask *mask; |
4327edf6 | 85 | |
e0cd5160 | 86 | #ifdef CONFIG_NUMA |
6be954d1 DJ |
87 | mask = (dev_to_node(dev) == -1) ? cpu_online_mask : |
88 | cpumask_of_node(dev_to_node(dev)); | |
e0cd5160 | 89 | #else |
3be83050 | 90 | mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); |
e0cd5160 | 91 | #endif |
5aaba363 | 92 | return cpumap_print_to_pagebuf(list, buf, mask); |
39106dcf MT |
93 | } |
94 | ||
c489f5fb | 95 | static ssize_t local_cpus_show(struct device *dev, |
3c78bc61 | 96 | struct device_attribute *attr, char *buf) |
c489f5fb | 97 | { |
5aaba363 | 98 | return pci_dev_show_local_cpu(dev, false, attr, buf); |
c489f5fb | 99 | } |
5136b2da | 100 | static DEVICE_ATTR_RO(local_cpus); |
39106dcf MT |
101 | |
102 | static ssize_t local_cpulist_show(struct device *dev, | |
3c78bc61 | 103 | struct device_attribute *attr, char *buf) |
39106dcf | 104 | { |
5aaba363 | 105 | return pci_dev_show_local_cpu(dev, true, attr, buf); |
1da177e4 | 106 | } |
5136b2da | 107 | static DEVICE_ATTR_RO(local_cpulist); |
1da177e4 | 108 | |
dc2c2c9d YL |
109 | /* |
110 | * PCI Bus Class Devices | |
111 | */ | |
56039e65 GKH |
112 | static ssize_t cpuaffinity_show(struct device *dev, |
113 | struct device_attribute *attr, char *buf) | |
dc2c2c9d | 114 | { |
5aaba363 SH |
115 | const struct cpumask *cpumask = cpumask_of_pcibus(to_pci_bus(dev)); |
116 | ||
117 | return cpumap_print_to_pagebuf(false, buf, cpumask); | |
dc2c2c9d | 118 | } |
56039e65 | 119 | static DEVICE_ATTR_RO(cpuaffinity); |
dc2c2c9d | 120 | |
56039e65 GKH |
121 | static ssize_t cpulistaffinity_show(struct device *dev, |
122 | struct device_attribute *attr, char *buf) | |
dc2c2c9d | 123 | { |
5aaba363 SH |
124 | const struct cpumask *cpumask = cpumask_of_pcibus(to_pci_bus(dev)); |
125 | ||
126 | return cpumap_print_to_pagebuf(true, buf, cpumask); | |
dc2c2c9d | 127 | } |
56039e65 | 128 | static DEVICE_ATTR_RO(cpulistaffinity); |
dc2c2c9d | 129 | |
1da177e4 | 130 | /* show resources */ |
3c78bc61 RD |
131 | static ssize_t resource_show(struct device *dev, struct device_attribute *attr, |
132 | char *buf) | |
1da177e4 | 133 | { |
3c78bc61 RD |
134 | struct pci_dev *pci_dev = to_pci_dev(dev); |
135 | char *str = buf; | |
1da177e4 | 136 | int i; |
fde09c6d | 137 | int max; |
e31dd6e4 | 138 | resource_size_t start, end; |
1da177e4 LT |
139 | |
140 | if (pci_dev->subordinate) | |
141 | max = DEVICE_COUNT_RESOURCE; | |
fde09c6d YZ |
142 | else |
143 | max = PCI_BRIDGE_RESOURCES; | |
1da177e4 LT |
144 | |
145 | for (i = 0; i < max; i++) { | |
2311b1f2 ME |
146 | struct resource *res = &pci_dev->resource[i]; |
147 | pci_resource_to_user(pci_dev, i, res, &start, &end); | |
3c78bc61 | 148 | str += sprintf(str, "0x%016llx 0x%016llx 0x%016llx\n", |
2311b1f2 ME |
149 | (unsigned long long)start, |
150 | (unsigned long long)end, | |
151 | (unsigned long long)res->flags); | |
1da177e4 LT |
152 | } |
153 | return (str - buf); | |
154 | } | |
5136b2da | 155 | static DEVICE_ATTR_RO(resource); |
1da177e4 | 156 | |
56c1af46 WVK |
157 | static ssize_t max_link_speed_show(struct device *dev, |
158 | struct device_attribute *attr, char *buf) | |
159 | { | |
160 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
161 | u32 linkcap; | |
162 | int err; | |
163 | const char *speed; | |
164 | ||
165 | err = pcie_capability_read_dword(pci_dev, PCI_EXP_LNKCAP, &linkcap); | |
166 | if (err) | |
167 | return -EINVAL; | |
168 | ||
169 | switch (linkcap & PCI_EXP_LNKCAP_SLS) { | |
170 | case PCI_EXP_LNKCAP_SLS_8_0GB: | |
171 | speed = "8 GT/s"; | |
172 | break; | |
173 | case PCI_EXP_LNKCAP_SLS_5_0GB: | |
174 | speed = "5 GT/s"; | |
175 | break; | |
176 | case PCI_EXP_LNKCAP_SLS_2_5GB: | |
177 | speed = "2.5 GT/s"; | |
178 | break; | |
179 | default: | |
180 | speed = "Unknown speed"; | |
181 | } | |
182 | ||
183 | return sprintf(buf, "%s\n", speed); | |
184 | } | |
185 | static DEVICE_ATTR_RO(max_link_speed); | |
186 | ||
187 | static ssize_t max_link_width_show(struct device *dev, | |
188 | struct device_attribute *attr, char *buf) | |
189 | { | |
190 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
191 | u32 linkcap; | |
192 | int err; | |
193 | ||
194 | err = pcie_capability_read_dword(pci_dev, PCI_EXP_LNKCAP, &linkcap); | |
195 | if (err) | |
196 | return -EINVAL; | |
197 | ||
198 | return sprintf(buf, "%u\n", (linkcap & PCI_EXP_LNKCAP_MLW) >> 4); | |
199 | } | |
200 | static DEVICE_ATTR_RO(max_link_width); | |
201 | ||
202 | static ssize_t current_link_speed_show(struct device *dev, | |
203 | struct device_attribute *attr, char *buf) | |
204 | { | |
205 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
206 | u16 linkstat; | |
207 | int err; | |
208 | const char *speed; | |
209 | ||
210 | err = pcie_capability_read_word(pci_dev, PCI_EXP_LNKSTA, &linkstat); | |
211 | if (err) | |
212 | return -EINVAL; | |
213 | ||
214 | switch (linkstat & PCI_EXP_LNKSTA_CLS) { | |
215 | case PCI_EXP_LNKSTA_CLS_8_0GB: | |
216 | speed = "8 GT/s"; | |
217 | break; | |
218 | case PCI_EXP_LNKSTA_CLS_5_0GB: | |
219 | speed = "5 GT/s"; | |
220 | break; | |
221 | case PCI_EXP_LNKSTA_CLS_2_5GB: | |
222 | speed = "2.5 GT/s"; | |
223 | break; | |
224 | default: | |
225 | speed = "Unknown speed"; | |
226 | } | |
227 | ||
228 | return sprintf(buf, "%s\n", speed); | |
229 | } | |
230 | static DEVICE_ATTR_RO(current_link_speed); | |
231 | ||
232 | static ssize_t current_link_width_show(struct device *dev, | |
233 | struct device_attribute *attr, char *buf) | |
234 | { | |
235 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
236 | u16 linkstat; | |
237 | int err; | |
238 | ||
239 | err = pcie_capability_read_word(pci_dev, PCI_EXP_LNKSTA, &linkstat); | |
240 | if (err) | |
241 | return -EINVAL; | |
242 | ||
243 | return sprintf(buf, "%u\n", | |
244 | (linkstat & PCI_EXP_LNKSTA_NLW) >> PCI_EXP_LNKSTA_NLW_SHIFT); | |
245 | } | |
246 | static DEVICE_ATTR_RO(current_link_width); | |
247 | ||
248 | static ssize_t secondary_bus_number_show(struct device *dev, | |
249 | struct device_attribute *attr, | |
250 | char *buf) | |
251 | { | |
252 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
253 | u8 sec_bus; | |
254 | int err; | |
255 | ||
256 | err = pci_read_config_byte(pci_dev, PCI_SECONDARY_BUS, &sec_bus); | |
257 | if (err) | |
258 | return -EINVAL; | |
259 | ||
260 | return sprintf(buf, "%u\n", sec_bus); | |
261 | } | |
262 | static DEVICE_ATTR_RO(secondary_bus_number); | |
263 | ||
264 | static ssize_t subordinate_bus_number_show(struct device *dev, | |
265 | struct device_attribute *attr, | |
266 | char *buf) | |
267 | { | |
268 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
269 | u8 sub_bus; | |
270 | int err; | |
271 | ||
272 | err = pci_read_config_byte(pci_dev, PCI_SUBORDINATE_BUS, &sub_bus); | |
273 | if (err) | |
274 | return -EINVAL; | |
275 | ||
276 | return sprintf(buf, "%u\n", sub_bus); | |
277 | } | |
278 | static DEVICE_ATTR_RO(subordinate_bus_number); | |
279 | ||
3c78bc61 RD |
280 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, |
281 | char *buf) | |
9888549e GK |
282 | { |
283 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
284 | ||
89ec3dcf | 285 | return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02X\n", |
9888549e GK |
286 | pci_dev->vendor, pci_dev->device, |
287 | pci_dev->subsystem_vendor, pci_dev->subsystem_device, | |
288 | (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8), | |
289 | (u8)(pci_dev->class)); | |
290 | } | |
5136b2da | 291 | static DEVICE_ATTR_RO(modalias); |
bae94d02 | 292 | |
d8e7d53a | 293 | static ssize_t enable_store(struct device *dev, struct device_attribute *attr, |
3c78bc61 | 294 | const char *buf, size_t count) |
9f125d30 AV |
295 | { |
296 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 | 297 | unsigned long val; |
9a994e8e | 298 | ssize_t result = kstrtoul(buf, 0, &val); |
92425a40 TP |
299 | |
300 | if (result < 0) | |
301 | return result; | |
9f125d30 AV |
302 | |
303 | /* this can crash the machine when done on the "wrong" device */ | |
304 | if (!capable(CAP_SYS_ADMIN)) | |
92425a40 | 305 | return -EPERM; |
9f125d30 | 306 | |
92425a40 | 307 | if (!val) { |
296ccb08 | 308 | if (pci_is_enabled(pdev)) |
bae94d02 IPG |
309 | pci_disable_device(pdev); |
310 | else | |
311 | result = -EIO; | |
92425a40 | 312 | } else |
bae94d02 | 313 | result = pci_enable_device(pdev); |
9f125d30 | 314 | |
bae94d02 IPG |
315 | return result < 0 ? result : count; |
316 | } | |
317 | ||
d8e7d53a | 318 | static ssize_t enable_show(struct device *dev, struct device_attribute *attr, |
3c78bc61 | 319 | char *buf) |
bae94d02 IPG |
320 | { |
321 | struct pci_dev *pdev; | |
9f125d30 | 322 | |
3c78bc61 RD |
323 | pdev = to_pci_dev(dev); |
324 | return sprintf(buf, "%u\n", atomic_read(&pdev->enable_cnt)); | |
9f125d30 | 325 | } |
d8e7d53a | 326 | static DEVICE_ATTR_RW(enable); |
9f125d30 | 327 | |
81bb0e19 | 328 | #ifdef CONFIG_NUMA |
63692df1 PB |
329 | static ssize_t numa_node_store(struct device *dev, |
330 | struct device_attribute *attr, const char *buf, | |
331 | size_t count) | |
332 | { | |
333 | struct pci_dev *pdev = to_pci_dev(dev); | |
334 | int node, ret; | |
335 | ||
336 | if (!capable(CAP_SYS_ADMIN)) | |
337 | return -EPERM; | |
338 | ||
339 | ret = kstrtoint(buf, 0, &node); | |
340 | if (ret) | |
341 | return ret; | |
342 | ||
3dcc8d39 MK |
343 | if ((node < 0 && node != NUMA_NO_NODE) || node >= MAX_NUMNODES) |
344 | return -EINVAL; | |
345 | ||
346 | if (node != NUMA_NO_NODE && !node_online(node)) | |
63692df1 PB |
347 | return -EINVAL; |
348 | ||
349 | add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK); | |
350 | dev_alert(&pdev->dev, FW_BUG "Overriding NUMA node to %d. Contact your vendor for updates.", | |
351 | node); | |
352 | ||
353 | dev->numa_node = node; | |
354 | return count; | |
355 | } | |
356 | ||
3c78bc61 RD |
357 | static ssize_t numa_node_show(struct device *dev, struct device_attribute *attr, |
358 | char *buf) | |
81bb0e19 | 359 | { |
3c78bc61 | 360 | return sprintf(buf, "%d\n", dev->numa_node); |
81bb0e19 | 361 | } |
63692df1 | 362 | static DEVICE_ATTR_RW(numa_node); |
81bb0e19 BG |
363 | #endif |
364 | ||
3c78bc61 RD |
365 | static ssize_t dma_mask_bits_show(struct device *dev, |
366 | struct device_attribute *attr, char *buf) | |
bb965401 YL |
367 | { |
368 | struct pci_dev *pdev = to_pci_dev(dev); | |
369 | ||
3c78bc61 | 370 | return sprintf(buf, "%d\n", fls64(pdev->dma_mask)); |
bb965401 | 371 | } |
5136b2da | 372 | static DEVICE_ATTR_RO(dma_mask_bits); |
bb965401 | 373 | |
3c78bc61 RD |
374 | static ssize_t consistent_dma_mask_bits_show(struct device *dev, |
375 | struct device_attribute *attr, | |
376 | char *buf) | |
bb965401 | 377 | { |
3c78bc61 | 378 | return sprintf(buf, "%d\n", fls64(dev->coherent_dma_mask)); |
bb965401 | 379 | } |
5136b2da | 380 | static DEVICE_ATTR_RO(consistent_dma_mask_bits); |
bb965401 | 381 | |
3c78bc61 RD |
382 | static ssize_t msi_bus_show(struct device *dev, struct device_attribute *attr, |
383 | char *buf) | |
fe97064c BG |
384 | { |
385 | struct pci_dev *pdev = to_pci_dev(dev); | |
468ff15a | 386 | struct pci_bus *subordinate = pdev->subordinate; |
fe97064c | 387 | |
468ff15a YW |
388 | return sprintf(buf, "%u\n", subordinate ? |
389 | !(subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) | |
390 | : !pdev->no_msi); | |
fe97064c BG |
391 | } |
392 | ||
3c78bc61 RD |
393 | static ssize_t msi_bus_store(struct device *dev, struct device_attribute *attr, |
394 | const char *buf, size_t count) | |
fe97064c BG |
395 | { |
396 | struct pci_dev *pdev = to_pci_dev(dev); | |
468ff15a | 397 | struct pci_bus *subordinate = pdev->subordinate; |
92425a40 TP |
398 | unsigned long val; |
399 | ||
9a994e8e | 400 | if (kstrtoul(buf, 0, &val) < 0) |
92425a40 | 401 | return -EINVAL; |
fe97064c | 402 | |
fe97064c | 403 | if (!capable(CAP_SYS_ADMIN)) |
92425a40 | 404 | return -EPERM; |
fe97064c | 405 | |
f7625980 | 406 | /* |
468ff15a YW |
407 | * "no_msi" and "bus_flags" only affect what happens when a driver |
408 | * requests MSI or MSI-X. They don't affect any drivers that have | |
409 | * already requested MSI or MSI-X. | |
f7625980 | 410 | */ |
468ff15a YW |
411 | if (!subordinate) { |
412 | pdev->no_msi = !val; | |
413 | dev_info(&pdev->dev, "MSI/MSI-X %s for future drivers\n", | |
414 | val ? "allowed" : "disallowed"); | |
fe97064c | 415 | return count; |
fe97064c BG |
416 | } |
417 | ||
468ff15a YW |
418 | if (val) |
419 | subordinate->bus_flags &= ~PCI_BUS_FLAGS_NO_MSI; | |
420 | else | |
421 | subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI; | |
422 | ||
423 | dev_info(&subordinate->dev, "MSI/MSI-X %s for future drivers of devices on this bus\n", | |
424 | val ? "allowed" : "disallowed"); | |
fe97064c BG |
425 | return count; |
426 | } | |
5136b2da | 427 | static DEVICE_ATTR_RW(msi_bus); |
9888549e | 428 | |
705b1aaa AC |
429 | static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf, |
430 | size_t count) | |
431 | { | |
432 | unsigned long val; | |
433 | struct pci_bus *b = NULL; | |
434 | ||
9a994e8e | 435 | if (kstrtoul(buf, 0, &val) < 0) |
705b1aaa AC |
436 | return -EINVAL; |
437 | ||
438 | if (val) { | |
9d16947b | 439 | pci_lock_rescan_remove(); |
705b1aaa AC |
440 | while ((b = pci_find_next_bus(b)) != NULL) |
441 | pci_rescan_bus(b); | |
9d16947b | 442 | pci_unlock_rescan_remove(); |
705b1aaa AC |
443 | } |
444 | return count; | |
445 | } | |
0f49ba55 | 446 | static BUS_ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store); |
705b1aaa | 447 | |
bf22c90f | 448 | static struct attribute *pci_bus_attrs[] = { |
0f49ba55 GKH |
449 | &bus_attr_rescan.attr, |
450 | NULL, | |
451 | }; | |
452 | ||
453 | static const struct attribute_group pci_bus_group = { | |
454 | .attrs = pci_bus_attrs, | |
455 | }; | |
456 | ||
457 | const struct attribute_group *pci_bus_groups[] = { | |
458 | &pci_bus_group, | |
459 | NULL, | |
705b1aaa | 460 | }; |
77c27c7b | 461 | |
3c78bc61 RD |
462 | static ssize_t dev_rescan_store(struct device *dev, |
463 | struct device_attribute *attr, const char *buf, | |
464 | size_t count) | |
738a6396 AC |
465 | { |
466 | unsigned long val; | |
467 | struct pci_dev *pdev = to_pci_dev(dev); | |
468 | ||
9a994e8e | 469 | if (kstrtoul(buf, 0, &val) < 0) |
738a6396 AC |
470 | return -EINVAL; |
471 | ||
472 | if (val) { | |
9d16947b | 473 | pci_lock_rescan_remove(); |
738a6396 | 474 | pci_rescan_bus(pdev->bus); |
9d16947b | 475 | pci_unlock_rescan_remove(); |
738a6396 AC |
476 | } |
477 | return count; | |
478 | } | |
bf22c90f SK |
479 | static struct device_attribute dev_rescan_attr = __ATTR(rescan, |
480 | (S_IWUSR|S_IWGRP), | |
481 | NULL, dev_rescan_store); | |
738a6396 | 482 | |
3c78bc61 RD |
483 | static ssize_t remove_store(struct device *dev, struct device_attribute *attr, |
484 | const char *buf, size_t count) | |
77c27c7b | 485 | { |
77c27c7b | 486 | unsigned long val; |
77c27c7b | 487 | |
9a994e8e | 488 | if (kstrtoul(buf, 0, &val) < 0) |
77c27c7b AC |
489 | return -EINVAL; |
490 | ||
bc6caf02 TH |
491 | if (val && device_remove_file_self(dev, attr)) |
492 | pci_stop_and_remove_bus_device_locked(to_pci_dev(dev)); | |
77c27c7b AC |
493 | return count; |
494 | } | |
bf22c90f SK |
495 | static struct device_attribute dev_remove_attr = __ATTR(remove, |
496 | (S_IWUSR|S_IWGRP), | |
497 | NULL, remove_store); | |
b9d320fc | 498 | |
3c78bc61 RD |
499 | static ssize_t dev_bus_rescan_store(struct device *dev, |
500 | struct device_attribute *attr, | |
501 | const char *buf, size_t count) | |
b9d320fc YL |
502 | { |
503 | unsigned long val; | |
504 | struct pci_bus *bus = to_pci_bus(dev); | |
505 | ||
9a994e8e | 506 | if (kstrtoul(buf, 0, &val) < 0) |
b9d320fc YL |
507 | return -EINVAL; |
508 | ||
509 | if (val) { | |
9d16947b | 510 | pci_lock_rescan_remove(); |
2f320521 YL |
511 | if (!pci_is_root_bus(bus) && list_empty(&bus->devices)) |
512 | pci_rescan_bus_bridge_resize(bus->self); | |
513 | else | |
514 | pci_rescan_bus(bus); | |
9d16947b | 515 | pci_unlock_rescan_remove(); |
b9d320fc YL |
516 | } |
517 | return count; | |
518 | } | |
56039e65 | 519 | static DEVICE_ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store); |
b9d320fc | 520 | |
fbb988be | 521 | #if defined(CONFIG_PM) && defined(CONFIG_ACPI) |
448bd857 HY |
522 | static ssize_t d3cold_allowed_store(struct device *dev, |
523 | struct device_attribute *attr, | |
524 | const char *buf, size_t count) | |
525 | { | |
526 | struct pci_dev *pdev = to_pci_dev(dev); | |
527 | unsigned long val; | |
528 | ||
9a994e8e | 529 | if (kstrtoul(buf, 0, &val) < 0) |
448bd857 HY |
530 | return -EINVAL; |
531 | ||
532 | pdev->d3cold_allowed = !!val; | |
9d26d3a8 MW |
533 | if (pdev->d3cold_allowed) |
534 | pci_d3cold_enable(pdev); | |
535 | else | |
536 | pci_d3cold_disable(pdev); | |
537 | ||
448bd857 HY |
538 | pm_runtime_resume(dev); |
539 | ||
540 | return count; | |
541 | } | |
542 | ||
543 | static ssize_t d3cold_allowed_show(struct device *dev, | |
544 | struct device_attribute *attr, char *buf) | |
545 | { | |
546 | struct pci_dev *pdev = to_pci_dev(dev); | |
3c78bc61 | 547 | return sprintf(buf, "%u\n", pdev->d3cold_allowed); |
448bd857 | 548 | } |
5136b2da | 549 | static DEVICE_ATTR_RW(d3cold_allowed); |
448bd857 HY |
550 | #endif |
551 | ||
dfc73e7a SO |
552 | #ifdef CONFIG_OF |
553 | static ssize_t devspec_show(struct device *dev, | |
554 | struct device_attribute *attr, char *buf) | |
555 | { | |
556 | struct pci_dev *pdev = to_pci_dev(dev); | |
557 | struct device_node *np = pci_device_to_OF_node(pdev); | |
558 | ||
559 | if (np == NULL || np->full_name == NULL) | |
560 | return 0; | |
561 | return sprintf(buf, "%s", np->full_name); | |
562 | } | |
563 | static DEVICE_ATTR_RO(devspec); | |
564 | #endif | |
565 | ||
1789382a DD |
566 | #ifdef CONFIG_PCI_IOV |
567 | static ssize_t sriov_totalvfs_show(struct device *dev, | |
568 | struct device_attribute *attr, | |
569 | char *buf) | |
570 | { | |
571 | struct pci_dev *pdev = to_pci_dev(dev); | |
572 | ||
bff73156 | 573 | return sprintf(buf, "%u\n", pci_sriov_get_totalvfs(pdev)); |
1789382a DD |
574 | } |
575 | ||
576 | ||
577 | static ssize_t sriov_numvfs_show(struct device *dev, | |
578 | struct device_attribute *attr, | |
579 | char *buf) | |
580 | { | |
581 | struct pci_dev *pdev = to_pci_dev(dev); | |
582 | ||
6b136724 | 583 | return sprintf(buf, "%u\n", pdev->sriov->num_VFs); |
1789382a DD |
584 | } |
585 | ||
586 | /* | |
faa48a50 BH |
587 | * num_vfs > 0; number of VFs to enable |
588 | * num_vfs = 0; disable all VFs | |
1789382a DD |
589 | * |
590 | * Note: SRIOV spec doesn't allow partial VF | |
faa48a50 | 591 | * disable, so it's all or none. |
1789382a DD |
592 | */ |
593 | static ssize_t sriov_numvfs_store(struct device *dev, | |
594 | struct device_attribute *attr, | |
595 | const char *buf, size_t count) | |
596 | { | |
597 | struct pci_dev *pdev = to_pci_dev(dev); | |
faa48a50 BH |
598 | int ret; |
599 | u16 num_vfs; | |
1789382a | 600 | |
faa48a50 BH |
601 | ret = kstrtou16(buf, 0, &num_vfs); |
602 | if (ret < 0) | |
603 | return ret; | |
604 | ||
605 | if (num_vfs > pci_sriov_get_totalvfs(pdev)) | |
606 | return -ERANGE; | |
607 | ||
17530e71 | 608 | device_lock(&pdev->dev); |
5b0948df | 609 | |
faa48a50 | 610 | if (num_vfs == pdev->sriov->num_VFs) |
5b0948df | 611 | goto exit; |
1789382a DD |
612 | |
613 | /* is PF driver loaded w/callback */ | |
614 | if (!pdev->driver || !pdev->driver->sriov_configure) { | |
faa48a50 | 615 | dev_info(&pdev->dev, "Driver doesn't support SRIOV configuration via sysfs\n"); |
5b0948df ET |
616 | ret = -ENOENT; |
617 | goto exit; | |
1789382a DD |
618 | } |
619 | ||
faa48a50 BH |
620 | if (num_vfs == 0) { |
621 | /* disable VFs */ | |
622 | ret = pdev->driver->sriov_configure(pdev, 0); | |
5b0948df | 623 | goto exit; |
1789382a DD |
624 | } |
625 | ||
faa48a50 BH |
626 | /* enable VFs */ |
627 | if (pdev->sriov->num_VFs) { | |
628 | dev_warn(&pdev->dev, "%d VFs already enabled. Disable before enabling %d VFs\n", | |
629 | pdev->sriov->num_VFs, num_vfs); | |
5b0948df ET |
630 | ret = -EBUSY; |
631 | goto exit; | |
1789382a DD |
632 | } |
633 | ||
faa48a50 BH |
634 | ret = pdev->driver->sriov_configure(pdev, num_vfs); |
635 | if (ret < 0) | |
5b0948df | 636 | goto exit; |
1789382a | 637 | |
faa48a50 BH |
638 | if (ret != num_vfs) |
639 | dev_warn(&pdev->dev, "%d VFs requested; only %d enabled\n", | |
640 | num_vfs, ret); | |
641 | ||
5b0948df | 642 | exit: |
17530e71 | 643 | device_unlock(&pdev->dev); |
5b0948df ET |
644 | |
645 | if (ret < 0) | |
646 | return ret; | |
647 | ||
faa48a50 | 648 | return count; |
1789382a DD |
649 | } |
650 | ||
0e7df224 BW |
651 | static ssize_t sriov_drivers_autoprobe_show(struct device *dev, |
652 | struct device_attribute *attr, | |
653 | char *buf) | |
654 | { | |
655 | struct pci_dev *pdev = to_pci_dev(dev); | |
656 | ||
657 | return sprintf(buf, "%u\n", pdev->sriov->drivers_autoprobe); | |
658 | } | |
659 | ||
660 | static ssize_t sriov_drivers_autoprobe_store(struct device *dev, | |
661 | struct device_attribute *attr, | |
662 | const char *buf, size_t count) | |
663 | { | |
664 | struct pci_dev *pdev = to_pci_dev(dev); | |
665 | bool drivers_autoprobe; | |
666 | ||
667 | if (kstrtobool(buf, &drivers_autoprobe) < 0) | |
668 | return -EINVAL; | |
669 | ||
670 | pdev->sriov->drivers_autoprobe = drivers_autoprobe; | |
671 | ||
672 | return count; | |
673 | } | |
674 | ||
1789382a DD |
675 | static struct device_attribute sriov_totalvfs_attr = __ATTR_RO(sriov_totalvfs); |
676 | static struct device_attribute sriov_numvfs_attr = | |
677 | __ATTR(sriov_numvfs, (S_IRUGO|S_IWUSR|S_IWGRP), | |
678 | sriov_numvfs_show, sriov_numvfs_store); | |
0e7df224 BW |
679 | static struct device_attribute sriov_drivers_autoprobe_attr = |
680 | __ATTR(sriov_drivers_autoprobe, (S_IRUGO|S_IWUSR|S_IWGRP), | |
681 | sriov_drivers_autoprobe_show, sriov_drivers_autoprobe_store); | |
1789382a DD |
682 | #endif /* CONFIG_PCI_IOV */ |
683 | ||
782a985d AW |
684 | static ssize_t driver_override_store(struct device *dev, |
685 | struct device_attribute *attr, | |
686 | const char *buf, size_t count) | |
687 | { | |
688 | struct pci_dev *pdev = to_pci_dev(dev); | |
689 | char *driver_override, *old = pdev->driver_override, *cp; | |
690 | ||
4efe874a SL |
691 | /* We need to keep extra room for a newline */ |
692 | if (count >= (PAGE_SIZE - 1)) | |
782a985d AW |
693 | return -EINVAL; |
694 | ||
695 | driver_override = kstrndup(buf, count, GFP_KERNEL); | |
696 | if (!driver_override) | |
697 | return -ENOMEM; | |
698 | ||
699 | cp = strchr(driver_override, '\n'); | |
700 | if (cp) | |
701 | *cp = '\0'; | |
702 | ||
703 | if (strlen(driver_override)) { | |
704 | pdev->driver_override = driver_override; | |
705 | } else { | |
706 | kfree(driver_override); | |
707 | pdev->driver_override = NULL; | |
708 | } | |
709 | ||
710 | kfree(old); | |
711 | ||
712 | return count; | |
713 | } | |
714 | ||
715 | static ssize_t driver_override_show(struct device *dev, | |
716 | struct device_attribute *attr, char *buf) | |
717 | { | |
718 | struct pci_dev *pdev = to_pci_dev(dev); | |
719 | ||
4efe874a | 720 | return snprintf(buf, PAGE_SIZE, "%s\n", pdev->driver_override); |
782a985d AW |
721 | } |
722 | static DEVICE_ATTR_RW(driver_override); | |
723 | ||
bf22c90f | 724 | static struct attribute *pci_dev_attrs[] = { |
5136b2da GKH |
725 | &dev_attr_resource.attr, |
726 | &dev_attr_vendor.attr, | |
727 | &dev_attr_device.attr, | |
728 | &dev_attr_subsystem_vendor.attr, | |
729 | &dev_attr_subsystem_device.attr, | |
702ed3be | 730 | &dev_attr_revision.attr, |
5136b2da GKH |
731 | &dev_attr_class.attr, |
732 | &dev_attr_irq.attr, | |
733 | &dev_attr_local_cpus.attr, | |
734 | &dev_attr_local_cpulist.attr, | |
735 | &dev_attr_modalias.attr, | |
81bb0e19 | 736 | #ifdef CONFIG_NUMA |
5136b2da | 737 | &dev_attr_numa_node.attr, |
81bb0e19 | 738 | #endif |
5136b2da GKH |
739 | &dev_attr_dma_mask_bits.attr, |
740 | &dev_attr_consistent_dma_mask_bits.attr, | |
d8e7d53a | 741 | &dev_attr_enable.attr, |
5136b2da GKH |
742 | &dev_attr_broken_parity_status.attr, |
743 | &dev_attr_msi_bus.attr, | |
fbb988be | 744 | #if defined(CONFIG_PM) && defined(CONFIG_ACPI) |
5136b2da | 745 | &dev_attr_d3cold_allowed.attr, |
dfc73e7a SO |
746 | #endif |
747 | #ifdef CONFIG_OF | |
748 | &dev_attr_devspec.attr, | |
77c27c7b | 749 | #endif |
782a985d | 750 | &dev_attr_driver_override.attr, |
5136b2da GKH |
751 | NULL, |
752 | }; | |
753 | ||
56c1af46 WVK |
754 | static struct attribute *pci_bridge_attrs[] = { |
755 | &dev_attr_subordinate_bus_number.attr, | |
756 | &dev_attr_secondary_bus_number.attr, | |
757 | NULL, | |
5136b2da GKH |
758 | }; |
759 | ||
56c1af46 WVK |
760 | static struct attribute *pcie_dev_attrs[] = { |
761 | &dev_attr_current_link_speed.attr, | |
762 | &dev_attr_current_link_width.attr, | |
763 | &dev_attr_max_link_width.attr, | |
764 | &dev_attr_max_link_speed.attr, | |
5136b2da | 765 | NULL, |
1da177e4 LT |
766 | }; |
767 | ||
56039e65 GKH |
768 | static struct attribute *pcibus_attrs[] = { |
769 | &dev_attr_rescan.attr, | |
770 | &dev_attr_cpuaffinity.attr, | |
771 | &dev_attr_cpulistaffinity.attr, | |
772 | NULL, | |
773 | }; | |
774 | ||
775 | static const struct attribute_group pcibus_group = { | |
776 | .attrs = pcibus_attrs, | |
777 | }; | |
778 | ||
779 | const struct attribute_group *pcibus_groups[] = { | |
780 | &pcibus_group, | |
781 | NULL, | |
b9d320fc YL |
782 | }; |
783 | ||
3c78bc61 RD |
784 | static ssize_t boot_vga_show(struct device *dev, struct device_attribute *attr, |
785 | char *buf) | |
217f45de DA |
786 | { |
787 | struct pci_dev *pdev = to_pci_dev(dev); | |
1a39b310 MG |
788 | struct pci_dev *vga_dev = vga_default_device(); |
789 | ||
790 | if (vga_dev) | |
791 | return sprintf(buf, "%u\n", (pdev == vga_dev)); | |
217f45de DA |
792 | |
793 | return sprintf(buf, "%u\n", | |
794 | !!(pdev->resource[PCI_ROM_RESOURCE].flags & | |
795 | IORESOURCE_ROM_SHADOW)); | |
796 | } | |
bf22c90f | 797 | static struct device_attribute vga_attr = __ATTR_RO(boot_vga); |
217f45de | 798 | |
3c78bc61 RD |
799 | static ssize_t pci_read_config(struct file *filp, struct kobject *kobj, |
800 | struct bin_attribute *bin_attr, char *buf, | |
801 | loff_t off, size_t count) | |
1da177e4 | 802 | { |
554a6037 | 803 | struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj)); |
1da177e4 LT |
804 | unsigned int size = 64; |
805 | loff_t init_off = off; | |
3c78bc61 | 806 | u8 *data = (u8 *) buf; |
1da177e4 LT |
807 | |
808 | /* Several chips lock up trying to read undefined config space */ | |
ab0fa82b | 809 | if (file_ns_capable(filp, &init_user_ns, CAP_SYS_ADMIN)) |
1da177e4 | 810 | size = dev->cfg_size; |
3c78bc61 | 811 | else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) |
1da177e4 | 812 | size = 128; |
1da177e4 LT |
813 | |
814 | if (off > size) | |
815 | return 0; | |
816 | if (off + count > size) { | |
817 | size -= off; | |
818 | count = size; | |
819 | } else { | |
820 | size = count; | |
821 | } | |
822 | ||
3d8387ef HY |
823 | pci_config_pm_runtime_get(dev); |
824 | ||
4c0619ad | 825 | if ((off & 1) && size) { |
826 | u8 val; | |
e04b0ea2 | 827 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 828 | data[off - init_off] = val; |
1da177e4 | 829 | off++; |
4c0619ad | 830 | size--; |
831 | } | |
832 | ||
833 | if ((off & 3) && size > 2) { | |
834 | u16 val; | |
e04b0ea2 | 835 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 836 | data[off - init_off] = val & 0xff; |
837 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
838 | off += 2; | |
839 | size -= 2; | |
1da177e4 LT |
840 | } |
841 | ||
842 | while (size > 3) { | |
4c0619ad | 843 | u32 val; |
e04b0ea2 | 844 | pci_user_read_config_dword(dev, off, &val); |
4c0619ad | 845 | data[off - init_off] = val & 0xff; |
846 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
847 | data[off - init_off + 2] = (val >> 16) & 0xff; | |
848 | data[off - init_off + 3] = (val >> 24) & 0xff; | |
1da177e4 LT |
849 | off += 4; |
850 | size -= 4; | |
851 | } | |
852 | ||
4c0619ad | 853 | if (size >= 2) { |
854 | u16 val; | |
e04b0ea2 | 855 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 856 | data[off - init_off] = val & 0xff; |
857 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
858 | off += 2; | |
859 | size -= 2; | |
860 | } | |
861 | ||
862 | if (size > 0) { | |
863 | u8 val; | |
e04b0ea2 | 864 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 865 | data[off - init_off] = val; |
1da177e4 LT |
866 | off++; |
867 | --size; | |
868 | } | |
869 | ||
3d8387ef HY |
870 | pci_config_pm_runtime_put(dev); |
871 | ||
1da177e4 LT |
872 | return count; |
873 | } | |
874 | ||
3c78bc61 RD |
875 | static ssize_t pci_write_config(struct file *filp, struct kobject *kobj, |
876 | struct bin_attribute *bin_attr, char *buf, | |
877 | loff_t off, size_t count) | |
1da177e4 | 878 | { |
554a6037 | 879 | struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj)); |
1da177e4 LT |
880 | unsigned int size = count; |
881 | loff_t init_off = off; | |
3c78bc61 | 882 | u8 *data = (u8 *) buf; |
1da177e4 LT |
883 | |
884 | if (off > dev->cfg_size) | |
885 | return 0; | |
886 | if (off + count > dev->cfg_size) { | |
887 | size = dev->cfg_size - off; | |
888 | count = size; | |
889 | } | |
f7625980 | 890 | |
3d8387ef HY |
891 | pci_config_pm_runtime_get(dev); |
892 | ||
4c0619ad | 893 | if ((off & 1) && size) { |
e04b0ea2 | 894 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 | 895 | off++; |
4c0619ad | 896 | size--; |
1da177e4 | 897 | } |
f7625980 | 898 | |
4c0619ad | 899 | if ((off & 3) && size > 2) { |
900 | u16 val = data[off - init_off]; | |
901 | val |= (u16) data[off - init_off + 1] << 8; | |
3c78bc61 RD |
902 | pci_user_write_config_word(dev, off, val); |
903 | off += 2; | |
904 | size -= 2; | |
905 | } | |
1da177e4 LT |
906 | |
907 | while (size > 3) { | |
4c0619ad | 908 | u32 val = data[off - init_off]; |
909 | val |= (u32) data[off - init_off + 1] << 8; | |
910 | val |= (u32) data[off - init_off + 2] << 16; | |
911 | val |= (u32) data[off - init_off + 3] << 24; | |
e04b0ea2 | 912 | pci_user_write_config_dword(dev, off, val); |
1da177e4 LT |
913 | off += 4; |
914 | size -= 4; | |
915 | } | |
f7625980 | 916 | |
4c0619ad | 917 | if (size >= 2) { |
918 | u16 val = data[off - init_off]; | |
919 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 920 | pci_user_write_config_word(dev, off, val); |
4c0619ad | 921 | off += 2; |
922 | size -= 2; | |
923 | } | |
1da177e4 | 924 | |
4c0619ad | 925 | if (size) { |
e04b0ea2 | 926 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 LT |
927 | off++; |
928 | --size; | |
929 | } | |
930 | ||
3d8387ef HY |
931 | pci_config_pm_runtime_put(dev); |
932 | ||
1da177e4 LT |
933 | return count; |
934 | } | |
935 | ||
3c78bc61 RD |
936 | static ssize_t read_vpd_attr(struct file *filp, struct kobject *kobj, |
937 | struct bin_attribute *bin_attr, char *buf, | |
938 | loff_t off, size_t count) | |
94e61088 | 939 | { |
554a6037 | 940 | struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj)); |
94e61088 | 941 | |
f52e5629 HR |
942 | if (bin_attr->size > 0) { |
943 | if (off > bin_attr->size) | |
944 | count = 0; | |
945 | else if (count > bin_attr->size - off) | |
946 | count = bin_attr->size - off; | |
947 | } | |
94e61088 | 948 | |
287d19ce | 949 | return pci_read_vpd(dev, off, count, buf); |
94e61088 BH |
950 | } |
951 | ||
3c78bc61 RD |
952 | static ssize_t write_vpd_attr(struct file *filp, struct kobject *kobj, |
953 | struct bin_attribute *bin_attr, char *buf, | |
954 | loff_t off, size_t count) | |
94e61088 | 955 | { |
554a6037 | 956 | struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj)); |
94e61088 | 957 | |
f52e5629 HR |
958 | if (bin_attr->size > 0) { |
959 | if (off > bin_attr->size) | |
960 | count = 0; | |
961 | else if (count > bin_attr->size - off) | |
962 | count = bin_attr->size - off; | |
963 | } | |
94e61088 | 964 | |
287d19ce | 965 | return pci_write_vpd(dev, off, count, buf); |
94e61088 BH |
966 | } |
967 | ||
1da177e4 LT |
968 | #ifdef HAVE_PCI_LEGACY |
969 | /** | |
970 | * pci_read_legacy_io - read byte(s) from legacy I/O port space | |
2c3c8bea | 971 | * @filp: open sysfs file |
1da177e4 | 972 | * @kobj: kobject corresponding to file to read from |
cffb2faf | 973 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
974 | * @buf: buffer to store results |
975 | * @off: offset into legacy I/O port space | |
976 | * @count: number of bytes to read | |
977 | * | |
978 | * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
979 | * callback routine (pci_legacy_read). | |
980 | */ | |
3c78bc61 RD |
981 | static ssize_t pci_read_legacy_io(struct file *filp, struct kobject *kobj, |
982 | struct bin_attribute *bin_attr, char *buf, | |
983 | loff_t off, size_t count) | |
1da177e4 | 984 | { |
554a6037 | 985 | struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); |
1da177e4 | 986 | |
3c78bc61 RD |
987 | /* Only support 1, 2 or 4 byte accesses */ |
988 | if (count != 1 && count != 2 && count != 4) | |
989 | return -EINVAL; | |
1da177e4 | 990 | |
3c78bc61 | 991 | return pci_legacy_read(bus, off, (u32 *)buf, count); |
1da177e4 LT |
992 | } |
993 | ||
994 | /** | |
995 | * pci_write_legacy_io - write byte(s) to legacy I/O port space | |
2c3c8bea | 996 | * @filp: open sysfs file |
1da177e4 | 997 | * @kobj: kobject corresponding to file to read from |
cffb2faf | 998 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
999 | * @buf: buffer containing value to be written |
1000 | * @off: offset into legacy I/O port space | |
1001 | * @count: number of bytes to write | |
1002 | * | |
1003 | * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
1004 | * callback routine (pci_legacy_write). | |
1005 | */ | |
3c78bc61 RD |
1006 | static ssize_t pci_write_legacy_io(struct file *filp, struct kobject *kobj, |
1007 | struct bin_attribute *bin_attr, char *buf, | |
1008 | loff_t off, size_t count) | |
1da177e4 | 1009 | { |
554a6037 | 1010 | struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); |
1da177e4 | 1011 | |
3c78bc61 RD |
1012 | /* Only support 1, 2 or 4 byte accesses */ |
1013 | if (count != 1 && count != 2 && count != 4) | |
1014 | return -EINVAL; | |
1015 | ||
1016 | return pci_legacy_write(bus, off, *(u32 *)buf, count); | |
1da177e4 LT |
1017 | } |
1018 | ||
1019 | /** | |
1020 | * pci_mmap_legacy_mem - map legacy PCI memory into user memory space | |
2c3c8bea | 1021 | * @filp: open sysfs file |
1da177e4 LT |
1022 | * @kobj: kobject corresponding to device to be mapped |
1023 | * @attr: struct bin_attribute for this file | |
1024 | * @vma: struct vm_area_struct passed to mmap | |
1025 | * | |
f19aeb1f | 1026 | * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap |
1da177e4 LT |
1027 | * legacy memory space (first meg of bus space) into application virtual |
1028 | * memory space. | |
1029 | */ | |
3c78bc61 RD |
1030 | static int pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj, |
1031 | struct bin_attribute *attr, | |
1032 | struct vm_area_struct *vma) | |
1da177e4 | 1033 | { |
554a6037 | 1034 | struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); |
1da177e4 | 1035 | |
3c78bc61 | 1036 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem); |
f19aeb1f BH |
1037 | } |
1038 | ||
1039 | /** | |
1040 | * pci_mmap_legacy_io - map legacy PCI IO into user memory space | |
2c3c8bea | 1041 | * @filp: open sysfs file |
f19aeb1f BH |
1042 | * @kobj: kobject corresponding to device to be mapped |
1043 | * @attr: struct bin_attribute for this file | |
1044 | * @vma: struct vm_area_struct passed to mmap | |
1045 | * | |
1046 | * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap | |
1047 | * legacy IO space (first meg of bus space) into application virtual | |
1048 | * memory space. Returns -ENOSYS if the operation isn't supported | |
1049 | */ | |
3c78bc61 RD |
1050 | static int pci_mmap_legacy_io(struct file *filp, struct kobject *kobj, |
1051 | struct bin_attribute *attr, | |
1052 | struct vm_area_struct *vma) | |
f19aeb1f | 1053 | { |
554a6037 | 1054 | struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); |
f19aeb1f | 1055 | |
3c78bc61 | 1056 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io); |
f19aeb1f BH |
1057 | } |
1058 | ||
10a0ef39 IK |
1059 | /** |
1060 | * pci_adjust_legacy_attr - adjustment of legacy file attributes | |
1061 | * @b: bus to create files under | |
1062 | * @mmap_type: I/O port or memory | |
1063 | * | |
1064 | * Stub implementation. Can be overridden by arch if necessary. | |
1065 | */ | |
3c78bc61 RD |
1066 | void __weak pci_adjust_legacy_attr(struct pci_bus *b, |
1067 | enum pci_mmap_state mmap_type) | |
10a0ef39 | 1068 | { |
10a0ef39 IK |
1069 | } |
1070 | ||
f19aeb1f BH |
1071 | /** |
1072 | * pci_create_legacy_files - create legacy I/O port and memory files | |
1073 | * @b: bus to create files under | |
1074 | * | |
1075 | * Some platforms allow access to legacy I/O port and ISA memory space on | |
1076 | * a per-bus basis. This routine creates the files and ties them into | |
1077 | * their associated read, write and mmap files from pci-sysfs.c | |
1078 | * | |
25985edc | 1079 | * On error unwind, but don't propagate the error to the caller |
f19aeb1f BH |
1080 | * as it is ok to set up the PCI bus without these files. |
1081 | */ | |
1082 | void pci_create_legacy_files(struct pci_bus *b) | |
1083 | { | |
1084 | int error; | |
1085 | ||
1086 | b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2, | |
1087 | GFP_ATOMIC); | |
1088 | if (!b->legacy_io) | |
1089 | goto kzalloc_err; | |
1090 | ||
62e877b8 | 1091 | sysfs_bin_attr_init(b->legacy_io); |
f19aeb1f BH |
1092 | b->legacy_io->attr.name = "legacy_io"; |
1093 | b->legacy_io->size = 0xffff; | |
1094 | b->legacy_io->attr.mode = S_IRUSR | S_IWUSR; | |
1095 | b->legacy_io->read = pci_read_legacy_io; | |
1096 | b->legacy_io->write = pci_write_legacy_io; | |
1097 | b->legacy_io->mmap = pci_mmap_legacy_io; | |
10a0ef39 | 1098 | pci_adjust_legacy_attr(b, pci_mmap_io); |
f19aeb1f BH |
1099 | error = device_create_bin_file(&b->dev, b->legacy_io); |
1100 | if (error) | |
1101 | goto legacy_io_err; | |
1102 | ||
1103 | /* Allocated above after the legacy_io struct */ | |
1104 | b->legacy_mem = b->legacy_io + 1; | |
6757eca3 | 1105 | sysfs_bin_attr_init(b->legacy_mem); |
f19aeb1f BH |
1106 | b->legacy_mem->attr.name = "legacy_mem"; |
1107 | b->legacy_mem->size = 1024*1024; | |
1108 | b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR; | |
1109 | b->legacy_mem->mmap = pci_mmap_legacy_mem; | |
10a0ef39 | 1110 | pci_adjust_legacy_attr(b, pci_mmap_mem); |
f19aeb1f BH |
1111 | error = device_create_bin_file(&b->dev, b->legacy_mem); |
1112 | if (error) | |
1113 | goto legacy_mem_err; | |
1114 | ||
1115 | return; | |
1116 | ||
1117 | legacy_mem_err: | |
1118 | device_remove_bin_file(&b->dev, b->legacy_io); | |
1119 | legacy_io_err: | |
1120 | kfree(b->legacy_io); | |
1121 | b->legacy_io = NULL; | |
1122 | kzalloc_err: | |
227f0647 | 1123 | printk(KERN_WARNING "pci: warning: could not create legacy I/O port and ISA memory resources to sysfs\n"); |
f19aeb1f BH |
1124 | return; |
1125 | } | |
1126 | ||
1127 | void pci_remove_legacy_files(struct pci_bus *b) | |
1128 | { | |
1129 | if (b->legacy_io) { | |
1130 | device_remove_bin_file(&b->dev, b->legacy_io); | |
1131 | device_remove_bin_file(&b->dev, b->legacy_mem); | |
1132 | kfree(b->legacy_io); /* both are allocated here */ | |
1133 | } | |
1da177e4 LT |
1134 | } |
1135 | #endif /* HAVE_PCI_LEGACY */ | |
1136 | ||
f7195824 | 1137 | #if defined(HAVE_PCI_MMAP) || defined(ARCH_GENERIC_PCI_MMAP_RESOURCE) |
b5ff7df3 | 1138 | |
3b519e4e MW |
1139 | int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma, |
1140 | enum pci_mmap_api mmap_api) | |
b5ff7df3 | 1141 | { |
6bccc7f4 DW |
1142 | unsigned long nr, start, size; |
1143 | resource_size_t pci_start = 0, pci_end; | |
b5ff7df3 | 1144 | |
3b519e4e MW |
1145 | if (pci_resource_len(pdev, resno) == 0) |
1146 | return 0; | |
64b00175 | 1147 | nr = vma_pages(vma); |
b5ff7df3 | 1148 | start = vma->vm_pgoff; |
88e7df0b | 1149 | size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1; |
6bccc7f4 DW |
1150 | if (mmap_api == PCI_MMAP_PROCFS) { |
1151 | pci_resource_to_user(pdev, resno, &pdev->resource[resno], | |
1152 | &pci_start, &pci_end); | |
1153 | pci_start >>= PAGE_SHIFT; | |
1154 | } | |
3b519e4e MW |
1155 | if (start >= pci_start && start < pci_start + size && |
1156 | start + nr <= pci_start + size) | |
b5ff7df3 | 1157 | return 1; |
b5ff7df3 LT |
1158 | return 0; |
1159 | } | |
1160 | ||
1da177e4 LT |
1161 | /** |
1162 | * pci_mmap_resource - map a PCI resource into user memory space | |
1163 | * @kobj: kobject for mapping | |
1164 | * @attr: struct bin_attribute for the file being mapped | |
1165 | * @vma: struct vm_area_struct passed into the mmap | |
45aec1ae | 1166 | * @write_combine: 1 for write_combine mapping |
1da177e4 LT |
1167 | * |
1168 | * Use the regular PCI mapping routines to map a PCI resource into userspace. | |
1da177e4 | 1169 | */ |
3c78bc61 RD |
1170 | static int pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr, |
1171 | struct vm_area_struct *vma, int write_combine) | |
1da177e4 | 1172 | { |
554a6037 | 1173 | struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); |
dca40b18 | 1174 | int bar = (unsigned long)attr->private; |
1da177e4 | 1175 | enum pci_mmap_state mmap_type; |
dca40b18 | 1176 | struct resource *res = &pdev->resource[bar]; |
2311b1f2 | 1177 | |
ca620723 BH |
1178 | if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(res->start)) |
1179 | return -EINVAL; | |
1180 | ||
dca40b18 | 1181 | if (!pci_mmap_fits(pdev, bar, vma, PCI_MMAP_SYSFS)) { |
227f0647 | 1182 | WARN(1, "process \"%s\" tried to map 0x%08lx bytes at page 0x%08lx on %s BAR %d (start 0x%16Lx, size 0x%16Lx)\n", |
3b519e4e | 1183 | current->comm, vma->vm_end-vma->vm_start, vma->vm_pgoff, |
dca40b18 DW |
1184 | pci_name(pdev), bar, |
1185 | (u64)pci_resource_start(pdev, bar), | |
1186 | (u64)pci_resource_len(pdev, bar)); | |
b5ff7df3 | 1187 | return -EINVAL; |
3b519e4e | 1188 | } |
1da177e4 | 1189 | mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io; |
f7195824 DW |
1190 | |
1191 | return pci_mmap_resource_range(pdev, bar, vma, mmap_type, write_combine); | |
45aec1ae | 1192 | } |
1193 | ||
3c78bc61 RD |
1194 | static int pci_mmap_resource_uc(struct file *filp, struct kobject *kobj, |
1195 | struct bin_attribute *attr, | |
1196 | struct vm_area_struct *vma) | |
45aec1ae | 1197 | { |
1198 | return pci_mmap_resource(kobj, attr, vma, 0); | |
1199 | } | |
1200 | ||
3c78bc61 RD |
1201 | static int pci_mmap_resource_wc(struct file *filp, struct kobject *kobj, |
1202 | struct bin_attribute *attr, | |
1203 | struct vm_area_struct *vma) | |
45aec1ae | 1204 | { |
1205 | return pci_mmap_resource(kobj, attr, vma, 1); | |
1da177e4 LT |
1206 | } |
1207 | ||
3c78bc61 RD |
1208 | static ssize_t pci_resource_io(struct file *filp, struct kobject *kobj, |
1209 | struct bin_attribute *attr, char *buf, | |
1210 | loff_t off, size_t count, bool write) | |
8633328b | 1211 | { |
554a6037 | 1212 | struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); |
dca40b18 DW |
1213 | int bar = (unsigned long)attr->private; |
1214 | struct resource *res; | |
8633328b | 1215 | unsigned long port = off; |
8633328b | 1216 | |
dca40b18 | 1217 | res = &pdev->resource[bar]; |
8633328b | 1218 | |
dca40b18 | 1219 | port += pci_resource_start(pdev, bar); |
8633328b | 1220 | |
dca40b18 | 1221 | if (port > pci_resource_end(pdev, bar)) |
8633328b AW |
1222 | return 0; |
1223 | ||
dca40b18 | 1224 | if (port + count - 1 > pci_resource_end(pdev, bar)) |
8633328b AW |
1225 | return -EINVAL; |
1226 | ||
1227 | switch (count) { | |
1228 | case 1: | |
1229 | if (write) | |
1230 | outb(*(u8 *)buf, port); | |
1231 | else | |
1232 | *(u8 *)buf = inb(port); | |
1233 | return 1; | |
1234 | case 2: | |
1235 | if (write) | |
1236 | outw(*(u16 *)buf, port); | |
1237 | else | |
1238 | *(u16 *)buf = inw(port); | |
1239 | return 2; | |
1240 | case 4: | |
1241 | if (write) | |
1242 | outl(*(u32 *)buf, port); | |
1243 | else | |
1244 | *(u32 *)buf = inl(port); | |
1245 | return 4; | |
1246 | } | |
1247 | return -EINVAL; | |
1248 | } | |
1249 | ||
3c78bc61 RD |
1250 | static ssize_t pci_read_resource_io(struct file *filp, struct kobject *kobj, |
1251 | struct bin_attribute *attr, char *buf, | |
1252 | loff_t off, size_t count) | |
8633328b AW |
1253 | { |
1254 | return pci_resource_io(filp, kobj, attr, buf, off, count, false); | |
1255 | } | |
1256 | ||
3c78bc61 RD |
1257 | static ssize_t pci_write_resource_io(struct file *filp, struct kobject *kobj, |
1258 | struct bin_attribute *attr, char *buf, | |
1259 | loff_t off, size_t count) | |
8633328b AW |
1260 | { |
1261 | return pci_resource_io(filp, kobj, attr, buf, off, count, true); | |
1262 | } | |
1263 | ||
b19441af GKH |
1264 | /** |
1265 | * pci_remove_resource_files - cleanup resource files | |
cffb2faf | 1266 | * @pdev: dev to cleanup |
b19441af | 1267 | * |
cffb2faf | 1268 | * If we created resource files for @pdev, remove them from sysfs and |
b19441af GKH |
1269 | * free their resources. |
1270 | */ | |
3c78bc61 | 1271 | static void pci_remove_resource_files(struct pci_dev *pdev) |
b19441af GKH |
1272 | { |
1273 | int i; | |
1274 | ||
1275 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
1276 | struct bin_attribute *res_attr; | |
1277 | ||
1278 | res_attr = pdev->res_attr[i]; | |
1279 | if (res_attr) { | |
1280 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
1281 | kfree(res_attr); | |
1282 | } | |
45aec1ae | 1283 | |
1284 | res_attr = pdev->res_attr_wc[i]; | |
1285 | if (res_attr) { | |
1286 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
1287 | kfree(res_attr); | |
1288 | } | |
b19441af GKH |
1289 | } |
1290 | } | |
1291 | ||
45aec1ae | 1292 | static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine) |
1293 | { | |
1294 | /* allocate attribute structure, piggyback attribute name */ | |
1295 | int name_len = write_combine ? 13 : 10; | |
1296 | struct bin_attribute *res_attr; | |
bd5174df | 1297 | char *res_attr_name; |
45aec1ae | 1298 | int retval; |
1299 | ||
1300 | res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC); | |
bd5174df BH |
1301 | if (!res_attr) |
1302 | return -ENOMEM; | |
1303 | ||
1304 | res_attr_name = (char *)(res_attr + 1); | |
1305 | ||
1306 | sysfs_bin_attr_init(res_attr); | |
1307 | if (write_combine) { | |
1308 | pdev->res_attr_wc[num] = res_attr; | |
1309 | sprintf(res_attr_name, "resource%d_wc", num); | |
1310 | res_attr->mmap = pci_mmap_resource_wc; | |
1311 | } else { | |
1312 | pdev->res_attr[num] = res_attr; | |
1313 | sprintf(res_attr_name, "resource%d", num); | |
e854d8b2 DW |
1314 | if (pci_resource_flags(pdev, num) & IORESOURCE_IO) { |
1315 | res_attr->read = pci_read_resource_io; | |
1316 | res_attr->write = pci_write_resource_io; | |
1317 | if (arch_can_pci_mmap_io()) | |
1318 | res_attr->mmap = pci_mmap_resource_uc; | |
1319 | } else { | |
1320 | res_attr->mmap = pci_mmap_resource_uc; | |
1321 | } | |
bd5174df BH |
1322 | } |
1323 | res_attr->attr.name = res_attr_name; | |
1324 | res_attr->attr.mode = S_IRUSR | S_IWUSR; | |
1325 | res_attr->size = pci_resource_len(pdev, num); | |
dca40b18 | 1326 | res_attr->private = (void *)(unsigned long)num; |
bd5174df BH |
1327 | retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr); |
1328 | if (retval) | |
1329 | kfree(res_attr); | |
45aec1ae | 1330 | |
1331 | return retval; | |
1332 | } | |
1333 | ||
1da177e4 LT |
1334 | /** |
1335 | * pci_create_resource_files - create resource files in sysfs for @dev | |
cffb2faf | 1336 | * @pdev: dev in question |
1da177e4 | 1337 | * |
cffb2faf | 1338 | * Walk the resources in @pdev creating files for each resource available. |
1da177e4 | 1339 | */ |
b19441af | 1340 | static int pci_create_resource_files(struct pci_dev *pdev) |
1da177e4 LT |
1341 | { |
1342 | int i; | |
b19441af | 1343 | int retval; |
1da177e4 LT |
1344 | |
1345 | /* Expose the PCI resources from this device as files */ | |
1346 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
1da177e4 LT |
1347 | |
1348 | /* skip empty resources */ | |
1349 | if (!pci_resource_len(pdev, i)) | |
1350 | continue; | |
1351 | ||
45aec1ae | 1352 | retval = pci_create_attr(pdev, i, 0); |
1353 | /* for prefetchable resources, create a WC mappable file */ | |
ae749c7a DW |
1354 | if (!retval && arch_can_pci_mmap_wc() && |
1355 | pdev->resource[i].flags & IORESOURCE_PREFETCH) | |
45aec1ae | 1356 | retval = pci_create_attr(pdev, i, 1); |
45aec1ae | 1357 | if (retval) { |
1358 | pci_remove_resource_files(pdev); | |
1359 | return retval; | |
1da177e4 LT |
1360 | } |
1361 | } | |
b19441af | 1362 | return 0; |
1da177e4 LT |
1363 | } |
1364 | #else /* !HAVE_PCI_MMAP */ | |
10a0ef39 IK |
1365 | int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; } |
1366 | void __weak pci_remove_resource_files(struct pci_dev *dev) { return; } | |
1da177e4 LT |
1367 | #endif /* HAVE_PCI_MMAP */ |
1368 | ||
1369 | /** | |
1370 | * pci_write_rom - used to enable access to the PCI ROM display | |
2c3c8bea | 1371 | * @filp: sysfs file |
1da177e4 | 1372 | * @kobj: kernel object handle |
cffb2faf | 1373 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
1374 | * @buf: user input |
1375 | * @off: file offset | |
1376 | * @count: number of byte in input | |
1377 | * | |
1378 | * writing anything except 0 enables it | |
1379 | */ | |
3c78bc61 RD |
1380 | static ssize_t pci_write_rom(struct file *filp, struct kobject *kobj, |
1381 | struct bin_attribute *bin_attr, char *buf, | |
1382 | loff_t off, size_t count) | |
1da177e4 | 1383 | { |
554a6037 | 1384 | struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); |
1da177e4 LT |
1385 | |
1386 | if ((off == 0) && (*buf == '0') && (count == 2)) | |
1387 | pdev->rom_attr_enabled = 0; | |
1388 | else | |
1389 | pdev->rom_attr_enabled = 1; | |
1390 | ||
1391 | return count; | |
1392 | } | |
1393 | ||
1394 | /** | |
1395 | * pci_read_rom - read a PCI ROM | |
2c3c8bea | 1396 | * @filp: sysfs file |
1da177e4 | 1397 | * @kobj: kernel object handle |
cffb2faf | 1398 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
1399 | * @buf: where to put the data we read from the ROM |
1400 | * @off: file offset | |
1401 | * @count: number of bytes to read | |
1402 | * | |
1403 | * Put @count bytes starting at @off into @buf from the ROM in the PCI | |
1404 | * device corresponding to @kobj. | |
1405 | */ | |
3c78bc61 RD |
1406 | static ssize_t pci_read_rom(struct file *filp, struct kobject *kobj, |
1407 | struct bin_attribute *bin_attr, char *buf, | |
1408 | loff_t off, size_t count) | |
1da177e4 | 1409 | { |
554a6037 | 1410 | struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); |
1da177e4 LT |
1411 | void __iomem *rom; |
1412 | size_t size; | |
1413 | ||
1414 | if (!pdev->rom_attr_enabled) | |
1415 | return -EINVAL; | |
f7625980 | 1416 | |
1da177e4 | 1417 | rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */ |
97c44836 TN |
1418 | if (!rom || !size) |
1419 | return -EIO; | |
f7625980 | 1420 | |
1da177e4 LT |
1421 | if (off >= size) |
1422 | count = 0; | |
1423 | else { | |
1424 | if (off + count > size) | |
1425 | count = size - off; | |
f7625980 | 1426 | |
1da177e4 LT |
1427 | memcpy_fromio(buf, rom + off, count); |
1428 | } | |
1429 | pci_unmap_rom(pdev, rom); | |
f7625980 | 1430 | |
1da177e4 LT |
1431 | return count; |
1432 | } | |
1433 | ||
1434 | static struct bin_attribute pci_config_attr = { | |
1435 | .attr = { | |
1436 | .name = "config", | |
1437 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 1438 | }, |
557848c3 | 1439 | .size = PCI_CFG_SPACE_SIZE, |
1da177e4 LT |
1440 | .read = pci_read_config, |
1441 | .write = pci_write_config, | |
1442 | }; | |
1443 | ||
1444 | static struct bin_attribute pcie_config_attr = { | |
1445 | .attr = { | |
1446 | .name = "config", | |
1447 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 1448 | }, |
557848c3 | 1449 | .size = PCI_CFG_SPACE_EXP_SIZE, |
1da177e4 LT |
1450 | .read = pci_read_config, |
1451 | .write = pci_write_config, | |
1452 | }; | |
1453 | ||
3c78bc61 RD |
1454 | static ssize_t reset_store(struct device *dev, struct device_attribute *attr, |
1455 | const char *buf, size_t count) | |
711d5779 MT |
1456 | { |
1457 | struct pci_dev *pdev = to_pci_dev(dev); | |
1458 | unsigned long val; | |
9a994e8e | 1459 | ssize_t result = kstrtoul(buf, 0, &val); |
711d5779 MT |
1460 | |
1461 | if (result < 0) | |
1462 | return result; | |
1463 | ||
1464 | if (val != 1) | |
1465 | return -EINVAL; | |
447c5dd7 MS |
1466 | |
1467 | result = pci_reset_function(pdev); | |
1468 | if (result < 0) | |
1469 | return result; | |
1470 | ||
1471 | return count; | |
711d5779 MT |
1472 | } |
1473 | ||
1474 | static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store); | |
1475 | ||
280c73d3 ZY |
1476 | static int pci_create_capabilities_sysfs(struct pci_dev *dev) |
1477 | { | |
1478 | int retval; | |
1479 | struct bin_attribute *attr; | |
1480 | ||
1481 | /* If the device has VPD, try to expose it in sysfs. */ | |
1482 | if (dev->vpd) { | |
1483 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); | |
1484 | if (!attr) | |
1485 | return -ENOMEM; | |
1486 | ||
a07e4156 | 1487 | sysfs_bin_attr_init(attr); |
104daa71 | 1488 | attr->size = 0; |
280c73d3 ZY |
1489 | attr->attr.name = "vpd"; |
1490 | attr->attr.mode = S_IRUSR | S_IWUSR; | |
287d19ce SH |
1491 | attr->read = read_vpd_attr; |
1492 | attr->write = write_vpd_attr; | |
280c73d3 ZY |
1493 | retval = sysfs_create_bin_file(&dev->dev.kobj, attr); |
1494 | if (retval) { | |
0f12a4e2 | 1495 | kfree(attr); |
280c73d3 ZY |
1496 | return retval; |
1497 | } | |
1498 | dev->vpd->attr = attr; | |
1499 | } | |
1500 | ||
1501 | /* Active State Power Management */ | |
1502 | pcie_aspm_create_sysfs_dev_files(dev); | |
1503 | ||
711d5779 MT |
1504 | if (!pci_probe_reset_function(dev)) { |
1505 | retval = device_create_file(&dev->dev, &reset_attr); | |
1506 | if (retval) | |
1507 | goto error; | |
1508 | dev->reset_fn = 1; | |
1509 | } | |
280c73d3 | 1510 | return 0; |
711d5779 MT |
1511 | |
1512 | error: | |
1513 | pcie_aspm_remove_sysfs_dev_files(dev); | |
1514 | if (dev->vpd && dev->vpd->attr) { | |
1515 | sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr); | |
1516 | kfree(dev->vpd->attr); | |
1517 | } | |
1518 | ||
1519 | return retval; | |
280c73d3 ZY |
1520 | } |
1521 | ||
3c78bc61 | 1522 | int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev) |
1da177e4 | 1523 | { |
b19441af | 1524 | int retval; |
ac0c302a | 1525 | int rom_size; |
280c73d3 | 1526 | struct bin_attribute *attr; |
b19441af | 1527 | |
1da177e4 LT |
1528 | if (!sysfs_initialized) |
1529 | return -EACCES; | |
1530 | ||
c20aecf6 | 1531 | if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) |
b19441af | 1532 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
c20aecf6 JM |
1533 | else |
1534 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr); | |
b19441af GKH |
1535 | if (retval) |
1536 | goto err; | |
1da177e4 | 1537 | |
b19441af GKH |
1538 | retval = pci_create_resource_files(pdev); |
1539 | if (retval) | |
280c73d3 ZY |
1540 | goto err_config_file; |
1541 | ||
1da177e4 | 1542 | /* If the device has a ROM, try to expose it in sysfs. */ |
ac0c302a | 1543 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); |
280c73d3 | 1544 | if (rom_size) { |
94e61088 | 1545 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); |
280c73d3 | 1546 | if (!attr) { |
b19441af | 1547 | retval = -ENOMEM; |
9890b12a | 1548 | goto err_resource_files; |
1da177e4 | 1549 | } |
a07e4156 | 1550 | sysfs_bin_attr_init(attr); |
280c73d3 ZY |
1551 | attr->size = rom_size; |
1552 | attr->attr.name = "rom"; | |
ff29530e | 1553 | attr->attr.mode = S_IRUSR | S_IWUSR; |
280c73d3 ZY |
1554 | attr->read = pci_read_rom; |
1555 | attr->write = pci_write_rom; | |
1556 | retval = sysfs_create_bin_file(&pdev->dev.kobj, attr); | |
1557 | if (retval) { | |
1558 | kfree(attr); | |
1559 | goto err_resource_files; | |
1560 | } | |
1561 | pdev->rom_attr = attr; | |
1da177e4 | 1562 | } |
280c73d3 | 1563 | |
280c73d3 ZY |
1564 | /* add sysfs entries for various capabilities */ |
1565 | retval = pci_create_capabilities_sysfs(pdev); | |
1566 | if (retval) | |
625e1d59 | 1567 | goto err_rom_file; |
7d715a6c | 1568 | |
911e1c9b N |
1569 | pci_create_firmware_label_files(pdev); |
1570 | ||
1da177e4 | 1571 | return 0; |
b19441af | 1572 | |
a2cd52ca | 1573 | err_rom_file: |
9d88b93b | 1574 | if (pdev->rom_attr) { |
94e61088 | 1575 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); |
280c73d3 ZY |
1576 | kfree(pdev->rom_attr); |
1577 | pdev->rom_attr = NULL; | |
1578 | } | |
9890b12a ME |
1579 | err_resource_files: |
1580 | pci_remove_resource_files(pdev); | |
94e61088 | 1581 | err_config_file: |
c20aecf6 | 1582 | if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) |
b19441af | 1583 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
c20aecf6 JM |
1584 | else |
1585 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); | |
b19441af GKH |
1586 | err: |
1587 | return retval; | |
1da177e4 LT |
1588 | } |
1589 | ||
280c73d3 ZY |
1590 | static void pci_remove_capabilities_sysfs(struct pci_dev *dev) |
1591 | { | |
1592 | if (dev->vpd && dev->vpd->attr) { | |
1593 | sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr); | |
1594 | kfree(dev->vpd->attr); | |
1595 | } | |
1596 | ||
1597 | pcie_aspm_remove_sysfs_dev_files(dev); | |
711d5779 MT |
1598 | if (dev->reset_fn) { |
1599 | device_remove_file(&dev->dev, &reset_attr); | |
1600 | dev->reset_fn = 0; | |
1601 | } | |
280c73d3 ZY |
1602 | } |
1603 | ||
1da177e4 LT |
1604 | /** |
1605 | * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files | |
1606 | * @pdev: device whose entries we should free | |
1607 | * | |
1608 | * Cleanup when @pdev is removed from sysfs. | |
1609 | */ | |
1610 | void pci_remove_sysfs_dev_files(struct pci_dev *pdev) | |
1611 | { | |
d67afe5e DM |
1612 | if (!sysfs_initialized) |
1613 | return; | |
1614 | ||
280c73d3 | 1615 | pci_remove_capabilities_sysfs(pdev); |
7d715a6c | 1616 | |
c20aecf6 | 1617 | if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) |
1da177e4 | 1618 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
c20aecf6 JM |
1619 | else |
1620 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); | |
1da177e4 LT |
1621 | |
1622 | pci_remove_resource_files(pdev); | |
1623 | ||
9d88b93b | 1624 | if (pdev->rom_attr) { |
280c73d3 ZY |
1625 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); |
1626 | kfree(pdev->rom_attr); | |
9d88b93b | 1627 | pdev->rom_attr = NULL; |
1da177e4 | 1628 | } |
911e1c9b N |
1629 | |
1630 | pci_remove_firmware_label_files(pdev); | |
1da177e4 LT |
1631 | } |
1632 | ||
1633 | static int __init pci_sysfs_init(void) | |
1634 | { | |
1635 | struct pci_dev *pdev = NULL; | |
b19441af GKH |
1636 | int retval; |
1637 | ||
1da177e4 | 1638 | sysfs_initialized = 1; |
b19441af GKH |
1639 | for_each_pci_dev(pdev) { |
1640 | retval = pci_create_sysfs_dev_files(pdev); | |
151fc5df JL |
1641 | if (retval) { |
1642 | pci_dev_put(pdev); | |
b19441af | 1643 | return retval; |
151fc5df | 1644 | } |
b19441af | 1645 | } |
1da177e4 LT |
1646 | |
1647 | return 0; | |
1648 | } | |
40ee9e9f | 1649 | late_initcall(pci_sysfs_init); |
4e15c46b YL |
1650 | |
1651 | static struct attribute *pci_dev_dev_attrs[] = { | |
625e1d59 | 1652 | &vga_attr.attr, |
4e15c46b YL |
1653 | NULL, |
1654 | }; | |
1655 | ||
1656 | static umode_t pci_dev_attrs_are_visible(struct kobject *kobj, | |
3c78bc61 | 1657 | struct attribute *a, int n) |
4e15c46b | 1658 | { |
554a6037 | 1659 | struct device *dev = kobj_to_dev(kobj); |
625e1d59 YL |
1660 | struct pci_dev *pdev = to_pci_dev(dev); |
1661 | ||
1662 | if (a == &vga_attr.attr) | |
1663 | if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
1664 | return 0; | |
1665 | ||
4e15c46b YL |
1666 | return a->mode; |
1667 | } | |
1668 | ||
dfab88be JL |
1669 | static struct attribute *pci_dev_hp_attrs[] = { |
1670 | &dev_remove_attr.attr, | |
1671 | &dev_rescan_attr.attr, | |
1672 | NULL, | |
1673 | }; | |
1674 | ||
1675 | static umode_t pci_dev_hp_attrs_are_visible(struct kobject *kobj, | |
3c78bc61 | 1676 | struct attribute *a, int n) |
dfab88be | 1677 | { |
554a6037 | 1678 | struct device *dev = kobj_to_dev(kobj); |
dfab88be JL |
1679 | struct pci_dev *pdev = to_pci_dev(dev); |
1680 | ||
1681 | if (pdev->is_virtfn) | |
1682 | return 0; | |
1683 | ||
1684 | return a->mode; | |
1685 | } | |
1686 | ||
56c1af46 WVK |
1687 | static umode_t pci_bridge_attrs_are_visible(struct kobject *kobj, |
1688 | struct attribute *a, int n) | |
1689 | { | |
1690 | struct device *dev = kobj_to_dev(kobj); | |
1691 | struct pci_dev *pdev = to_pci_dev(dev); | |
1692 | ||
1693 | if (pci_is_bridge(pdev)) | |
1694 | return a->mode; | |
1695 | ||
1696 | return 0; | |
1697 | } | |
1698 | ||
1699 | static umode_t pcie_dev_attrs_are_visible(struct kobject *kobj, | |
1700 | struct attribute *a, int n) | |
1701 | { | |
1702 | struct device *dev = kobj_to_dev(kobj); | |
1703 | struct pci_dev *pdev = to_pci_dev(dev); | |
1704 | ||
1705 | if (pci_is_pcie(pdev)) | |
1706 | return a->mode; | |
1707 | ||
1708 | return 0; | |
1709 | } | |
1710 | ||
1711 | static const struct attribute_group pci_dev_group = { | |
1712 | .attrs = pci_dev_attrs, | |
1713 | }; | |
1714 | ||
1715 | const struct attribute_group *pci_dev_groups[] = { | |
1716 | &pci_dev_group, | |
1717 | NULL, | |
1718 | }; | |
1719 | ||
1720 | static const struct attribute_group pci_bridge_group = { | |
1721 | .attrs = pci_bridge_attrs, | |
1722 | }; | |
1723 | ||
1724 | const struct attribute_group *pci_bridge_groups[] = { | |
1725 | &pci_bridge_group, | |
1726 | NULL, | |
1727 | }; | |
1728 | ||
1729 | static const struct attribute_group pcie_dev_group = { | |
1730 | .attrs = pcie_dev_attrs, | |
1731 | }; | |
1732 | ||
1733 | const struct attribute_group *pcie_dev_groups[] = { | |
1734 | &pcie_dev_group, | |
1735 | NULL, | |
1736 | }; | |
1737 | ||
dfab88be JL |
1738 | static struct attribute_group pci_dev_hp_attr_group = { |
1739 | .attrs = pci_dev_hp_attrs, | |
1740 | .is_visible = pci_dev_hp_attrs_are_visible, | |
1741 | }; | |
1742 | ||
1789382a DD |
1743 | #ifdef CONFIG_PCI_IOV |
1744 | static struct attribute *sriov_dev_attrs[] = { | |
1745 | &sriov_totalvfs_attr.attr, | |
1746 | &sriov_numvfs_attr.attr, | |
0e7df224 | 1747 | &sriov_drivers_autoprobe_attr.attr, |
1789382a DD |
1748 | NULL, |
1749 | }; | |
1750 | ||
1751 | static umode_t sriov_attrs_are_visible(struct kobject *kobj, | |
3c78bc61 | 1752 | struct attribute *a, int n) |
1789382a | 1753 | { |
554a6037 | 1754 | struct device *dev = kobj_to_dev(kobj); |
1789382a DD |
1755 | |
1756 | if (!dev_is_pf(dev)) | |
1757 | return 0; | |
1758 | ||
1759 | return a->mode; | |
1760 | } | |
1761 | ||
1762 | static struct attribute_group sriov_dev_attr_group = { | |
1763 | .attrs = sriov_dev_attrs, | |
1764 | .is_visible = sriov_attrs_are_visible, | |
1765 | }; | |
1766 | #endif /* CONFIG_PCI_IOV */ | |
1767 | ||
4e15c46b YL |
1768 | static struct attribute_group pci_dev_attr_group = { |
1769 | .attrs = pci_dev_dev_attrs, | |
1770 | .is_visible = pci_dev_attrs_are_visible, | |
1771 | }; | |
1772 | ||
56c1af46 WVK |
1773 | static struct attribute_group pci_bridge_attr_group = { |
1774 | .attrs = pci_bridge_attrs, | |
1775 | .is_visible = pci_bridge_attrs_are_visible, | |
1776 | }; | |
1777 | ||
1778 | static struct attribute_group pcie_dev_attr_group = { | |
1779 | .attrs = pcie_dev_attrs, | |
1780 | .is_visible = pcie_dev_attrs_are_visible, | |
1781 | }; | |
1782 | ||
4e15c46b YL |
1783 | static const struct attribute_group *pci_dev_attr_groups[] = { |
1784 | &pci_dev_attr_group, | |
dfab88be | 1785 | &pci_dev_hp_attr_group, |
1789382a DD |
1786 | #ifdef CONFIG_PCI_IOV |
1787 | &sriov_dev_attr_group, | |
1788 | #endif | |
56c1af46 WVK |
1789 | &pci_bridge_attr_group, |
1790 | &pcie_dev_attr_group, | |
4e15c46b YL |
1791 | NULL, |
1792 | }; | |
1793 | ||
1794 | struct device_type pci_dev_type = { | |
1795 | .groups = pci_dev_attr_groups, | |
1796 | }; |