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"); | |
53 | pci_config_attr(class, "0x%06x\n"); | |
54 | pci_config_attr(irq, "%u\n"); | |
55 | ||
bdee9d98 DT |
56 | static ssize_t broken_parity_status_show(struct device *dev, |
57 | struct device_attribute *attr, | |
58 | char *buf) | |
59 | { | |
60 | struct pci_dev *pdev = to_pci_dev(dev); | |
3c78bc61 | 61 | return sprintf(buf, "%u\n", pdev->broken_parity_status); |
bdee9d98 DT |
62 | } |
63 | ||
64 | static ssize_t broken_parity_status_store(struct device *dev, | |
65 | struct device_attribute *attr, | |
66 | const char *buf, size_t count) | |
67 | { | |
68 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 | 69 | unsigned long val; |
bdee9d98 | 70 | |
9a994e8e | 71 | if (kstrtoul(buf, 0, &val) < 0) |
92425a40 TP |
72 | return -EINVAL; |
73 | ||
74 | pdev->broken_parity_status = !!val; | |
75 | ||
76 | return count; | |
bdee9d98 | 77 | } |
5136b2da | 78 | static DEVICE_ATTR_RW(broken_parity_status); |
bdee9d98 | 79 | |
5aaba363 | 80 | static ssize_t pci_dev_show_local_cpu(struct device *dev, bool list, |
3c78bc61 | 81 | struct device_attribute *attr, char *buf) |
c489f5fb | 82 | { |
3be83050 | 83 | const struct cpumask *mask; |
4327edf6 | 84 | |
e0cd5160 | 85 | #ifdef CONFIG_NUMA |
6be954d1 DJ |
86 | mask = (dev_to_node(dev) == -1) ? cpu_online_mask : |
87 | cpumask_of_node(dev_to_node(dev)); | |
e0cd5160 | 88 | #else |
3be83050 | 89 | mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); |
e0cd5160 | 90 | #endif |
5aaba363 | 91 | return cpumap_print_to_pagebuf(list, buf, mask); |
39106dcf MT |
92 | } |
93 | ||
c489f5fb | 94 | static ssize_t local_cpus_show(struct device *dev, |
3c78bc61 | 95 | struct device_attribute *attr, char *buf) |
c489f5fb | 96 | { |
5aaba363 | 97 | return pci_dev_show_local_cpu(dev, false, attr, buf); |
c489f5fb | 98 | } |
5136b2da | 99 | static DEVICE_ATTR_RO(local_cpus); |
39106dcf MT |
100 | |
101 | static ssize_t local_cpulist_show(struct device *dev, | |
3c78bc61 | 102 | struct device_attribute *attr, char *buf) |
39106dcf | 103 | { |
5aaba363 | 104 | return pci_dev_show_local_cpu(dev, true, attr, buf); |
1da177e4 | 105 | } |
5136b2da | 106 | static DEVICE_ATTR_RO(local_cpulist); |
1da177e4 | 107 | |
dc2c2c9d YL |
108 | /* |
109 | * PCI Bus Class Devices | |
110 | */ | |
56039e65 GKH |
111 | static ssize_t cpuaffinity_show(struct device *dev, |
112 | struct device_attribute *attr, char *buf) | |
dc2c2c9d | 113 | { |
5aaba363 SH |
114 | const struct cpumask *cpumask = cpumask_of_pcibus(to_pci_bus(dev)); |
115 | ||
116 | return cpumap_print_to_pagebuf(false, buf, cpumask); | |
dc2c2c9d | 117 | } |
56039e65 | 118 | static DEVICE_ATTR_RO(cpuaffinity); |
dc2c2c9d | 119 | |
56039e65 GKH |
120 | static ssize_t cpulistaffinity_show(struct device *dev, |
121 | struct device_attribute *attr, char *buf) | |
dc2c2c9d | 122 | { |
5aaba363 SH |
123 | const struct cpumask *cpumask = cpumask_of_pcibus(to_pci_bus(dev)); |
124 | ||
125 | return cpumap_print_to_pagebuf(true, buf, cpumask); | |
dc2c2c9d | 126 | } |
56039e65 | 127 | static DEVICE_ATTR_RO(cpulistaffinity); |
dc2c2c9d | 128 | |
1da177e4 | 129 | /* show resources */ |
3c78bc61 RD |
130 | static ssize_t resource_show(struct device *dev, struct device_attribute *attr, |
131 | char *buf) | |
1da177e4 | 132 | { |
3c78bc61 RD |
133 | struct pci_dev *pci_dev = to_pci_dev(dev); |
134 | char *str = buf; | |
1da177e4 | 135 | int i; |
fde09c6d | 136 | int max; |
e31dd6e4 | 137 | resource_size_t start, end; |
1da177e4 LT |
138 | |
139 | if (pci_dev->subordinate) | |
140 | max = DEVICE_COUNT_RESOURCE; | |
fde09c6d YZ |
141 | else |
142 | max = PCI_BRIDGE_RESOURCES; | |
1da177e4 LT |
143 | |
144 | for (i = 0; i < max; i++) { | |
2311b1f2 ME |
145 | struct resource *res = &pci_dev->resource[i]; |
146 | pci_resource_to_user(pci_dev, i, res, &start, &end); | |
3c78bc61 | 147 | str += sprintf(str, "0x%016llx 0x%016llx 0x%016llx\n", |
2311b1f2 ME |
148 | (unsigned long long)start, |
149 | (unsigned long long)end, | |
150 | (unsigned long long)res->flags); | |
1da177e4 LT |
151 | } |
152 | return (str - buf); | |
153 | } | |
5136b2da | 154 | static DEVICE_ATTR_RO(resource); |
1da177e4 | 155 | |
3c78bc61 RD |
156 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, |
157 | char *buf) | |
9888549e GKH |
158 | { |
159 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
160 | ||
89ec3dcf | 161 | return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02X\n", |
9888549e GKH |
162 | pci_dev->vendor, pci_dev->device, |
163 | pci_dev->subsystem_vendor, pci_dev->subsystem_device, | |
164 | (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8), | |
165 | (u8)(pci_dev->class)); | |
166 | } | |
5136b2da | 167 | static DEVICE_ATTR_RO(modalias); |
bae94d02 | 168 | |
d8e7d53a | 169 | static ssize_t enable_store(struct device *dev, struct device_attribute *attr, |
3c78bc61 | 170 | const char *buf, size_t count) |
9f125d30 AV |
171 | { |
172 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 | 173 | unsigned long val; |
9a994e8e | 174 | ssize_t result = kstrtoul(buf, 0, &val); |
92425a40 TP |
175 | |
176 | if (result < 0) | |
177 | return result; | |
9f125d30 AV |
178 | |
179 | /* this can crash the machine when done on the "wrong" device */ | |
180 | if (!capable(CAP_SYS_ADMIN)) | |
92425a40 | 181 | return -EPERM; |
9f125d30 | 182 | |
92425a40 | 183 | if (!val) { |
296ccb08 | 184 | if (pci_is_enabled(pdev)) |
bae94d02 IPG |
185 | pci_disable_device(pdev); |
186 | else | |
187 | result = -EIO; | |
92425a40 | 188 | } else |
bae94d02 | 189 | result = pci_enable_device(pdev); |
9f125d30 | 190 | |
bae94d02 IPG |
191 | return result < 0 ? result : count; |
192 | } | |
193 | ||
d8e7d53a | 194 | static ssize_t enable_show(struct device *dev, struct device_attribute *attr, |
3c78bc61 | 195 | char *buf) |
bae94d02 IPG |
196 | { |
197 | struct pci_dev *pdev; | |
9f125d30 | 198 | |
3c78bc61 RD |
199 | pdev = to_pci_dev(dev); |
200 | return sprintf(buf, "%u\n", atomic_read(&pdev->enable_cnt)); | |
9f125d30 | 201 | } |
d8e7d53a | 202 | static DEVICE_ATTR_RW(enable); |
9f125d30 | 203 | |
81bb0e19 | 204 | #ifdef CONFIG_NUMA |
63692df1 PB |
205 | static ssize_t numa_node_store(struct device *dev, |
206 | struct device_attribute *attr, const char *buf, | |
207 | size_t count) | |
208 | { | |
209 | struct pci_dev *pdev = to_pci_dev(dev); | |
210 | int node, ret; | |
211 | ||
212 | if (!capable(CAP_SYS_ADMIN)) | |
213 | return -EPERM; | |
214 | ||
215 | ret = kstrtoint(buf, 0, &node); | |
216 | if (ret) | |
217 | return ret; | |
218 | ||
3dcc8d39 MK |
219 | if ((node < 0 && node != NUMA_NO_NODE) || node >= MAX_NUMNODES) |
220 | return -EINVAL; | |
221 | ||
222 | if (node != NUMA_NO_NODE && !node_online(node)) | |
63692df1 PB |
223 | return -EINVAL; |
224 | ||
225 | add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK); | |
226 | dev_alert(&pdev->dev, FW_BUG "Overriding NUMA node to %d. Contact your vendor for updates.", | |
227 | node); | |
228 | ||
229 | dev->numa_node = node; | |
230 | return count; | |
231 | } | |
232 | ||
3c78bc61 RD |
233 | static ssize_t numa_node_show(struct device *dev, struct device_attribute *attr, |
234 | char *buf) | |
81bb0e19 | 235 | { |
3c78bc61 | 236 | return sprintf(buf, "%d\n", dev->numa_node); |
81bb0e19 | 237 | } |
63692df1 | 238 | static DEVICE_ATTR_RW(numa_node); |
81bb0e19 BG |
239 | #endif |
240 | ||
3c78bc61 RD |
241 | static ssize_t dma_mask_bits_show(struct device *dev, |
242 | struct device_attribute *attr, char *buf) | |
bb965401 YL |
243 | { |
244 | struct pci_dev *pdev = to_pci_dev(dev); | |
245 | ||
3c78bc61 | 246 | return sprintf(buf, "%d\n", fls64(pdev->dma_mask)); |
bb965401 | 247 | } |
5136b2da | 248 | static DEVICE_ATTR_RO(dma_mask_bits); |
bb965401 | 249 | |
3c78bc61 RD |
250 | static ssize_t consistent_dma_mask_bits_show(struct device *dev, |
251 | struct device_attribute *attr, | |
252 | char *buf) | |
bb965401 | 253 | { |
3c78bc61 | 254 | return sprintf(buf, "%d\n", fls64(dev->coherent_dma_mask)); |
bb965401 | 255 | } |
5136b2da | 256 | static DEVICE_ATTR_RO(consistent_dma_mask_bits); |
bb965401 | 257 | |
3c78bc61 RD |
258 | static ssize_t msi_bus_show(struct device *dev, struct device_attribute *attr, |
259 | char *buf) | |
fe97064c BG |
260 | { |
261 | struct pci_dev *pdev = to_pci_dev(dev); | |
468ff15a | 262 | struct pci_bus *subordinate = pdev->subordinate; |
fe97064c | 263 | |
468ff15a YW |
264 | return sprintf(buf, "%u\n", subordinate ? |
265 | !(subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) | |
266 | : !pdev->no_msi); | |
fe97064c BG |
267 | } |
268 | ||
3c78bc61 RD |
269 | static ssize_t msi_bus_store(struct device *dev, struct device_attribute *attr, |
270 | const char *buf, size_t count) | |
fe97064c BG |
271 | { |
272 | struct pci_dev *pdev = to_pci_dev(dev); | |
468ff15a | 273 | struct pci_bus *subordinate = pdev->subordinate; |
92425a40 TP |
274 | unsigned long val; |
275 | ||
9a994e8e | 276 | if (kstrtoul(buf, 0, &val) < 0) |
92425a40 | 277 | return -EINVAL; |
fe97064c | 278 | |
fe97064c | 279 | if (!capable(CAP_SYS_ADMIN)) |
92425a40 | 280 | return -EPERM; |
fe97064c | 281 | |
f7625980 | 282 | /* |
468ff15a YW |
283 | * "no_msi" and "bus_flags" only affect what happens when a driver |
284 | * requests MSI or MSI-X. They don't affect any drivers that have | |
285 | * already requested MSI or MSI-X. | |
f7625980 | 286 | */ |
468ff15a YW |
287 | if (!subordinate) { |
288 | pdev->no_msi = !val; | |
289 | dev_info(&pdev->dev, "MSI/MSI-X %s for future drivers\n", | |
290 | val ? "allowed" : "disallowed"); | |
fe97064c | 291 | return count; |
fe97064c BG |
292 | } |
293 | ||
468ff15a YW |
294 | if (val) |
295 | subordinate->bus_flags &= ~PCI_BUS_FLAGS_NO_MSI; | |
296 | else | |
297 | subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI; | |
298 | ||
299 | dev_info(&subordinate->dev, "MSI/MSI-X %s for future drivers of devices on this bus\n", | |
300 | val ? "allowed" : "disallowed"); | |
fe97064c BG |
301 | return count; |
302 | } | |
5136b2da | 303 | static DEVICE_ATTR_RW(msi_bus); |
9888549e | 304 | |
705b1aaa AC |
305 | static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf, |
306 | size_t count) | |
307 | { | |
308 | unsigned long val; | |
309 | struct pci_bus *b = NULL; | |
310 | ||
9a994e8e | 311 | if (kstrtoul(buf, 0, &val) < 0) |
705b1aaa AC |
312 | return -EINVAL; |
313 | ||
314 | if (val) { | |
9d16947b | 315 | pci_lock_rescan_remove(); |
705b1aaa AC |
316 | while ((b = pci_find_next_bus(b)) != NULL) |
317 | pci_rescan_bus(b); | |
9d16947b | 318 | pci_unlock_rescan_remove(); |
705b1aaa AC |
319 | } |
320 | return count; | |
321 | } | |
0f49ba55 | 322 | static BUS_ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store); |
705b1aaa | 323 | |
bf22c90f | 324 | static struct attribute *pci_bus_attrs[] = { |
0f49ba55 GKH |
325 | &bus_attr_rescan.attr, |
326 | NULL, | |
327 | }; | |
328 | ||
329 | static const struct attribute_group pci_bus_group = { | |
330 | .attrs = pci_bus_attrs, | |
331 | }; | |
332 | ||
333 | const struct attribute_group *pci_bus_groups[] = { | |
334 | &pci_bus_group, | |
335 | NULL, | |
705b1aaa | 336 | }; |
77c27c7b | 337 | |
3c78bc61 RD |
338 | static ssize_t dev_rescan_store(struct device *dev, |
339 | struct device_attribute *attr, const char *buf, | |
340 | size_t count) | |
738a6396 AC |
341 | { |
342 | unsigned long val; | |
343 | struct pci_dev *pdev = to_pci_dev(dev); | |
344 | ||
9a994e8e | 345 | if (kstrtoul(buf, 0, &val) < 0) |
738a6396 AC |
346 | return -EINVAL; |
347 | ||
348 | if (val) { | |
9d16947b | 349 | pci_lock_rescan_remove(); |
738a6396 | 350 | pci_rescan_bus(pdev->bus); |
9d16947b | 351 | pci_unlock_rescan_remove(); |
738a6396 AC |
352 | } |
353 | return count; | |
354 | } | |
bf22c90f SK |
355 | static struct device_attribute dev_rescan_attr = __ATTR(rescan, |
356 | (S_IWUSR|S_IWGRP), | |
357 | NULL, dev_rescan_store); | |
738a6396 | 358 | |
3c78bc61 RD |
359 | static ssize_t remove_store(struct device *dev, struct device_attribute *attr, |
360 | const char *buf, size_t count) | |
77c27c7b | 361 | { |
77c27c7b | 362 | unsigned long val; |
77c27c7b | 363 | |
9a994e8e | 364 | if (kstrtoul(buf, 0, &val) < 0) |
77c27c7b AC |
365 | return -EINVAL; |
366 | ||
bc6caf02 TH |
367 | if (val && device_remove_file_self(dev, attr)) |
368 | pci_stop_and_remove_bus_device_locked(to_pci_dev(dev)); | |
77c27c7b AC |
369 | return count; |
370 | } | |
bf22c90f SK |
371 | static struct device_attribute dev_remove_attr = __ATTR(remove, |
372 | (S_IWUSR|S_IWGRP), | |
373 | NULL, remove_store); | |
b9d320fc | 374 | |
3c78bc61 RD |
375 | static ssize_t dev_bus_rescan_store(struct device *dev, |
376 | struct device_attribute *attr, | |
377 | const char *buf, size_t count) | |
b9d320fc YL |
378 | { |
379 | unsigned long val; | |
380 | struct pci_bus *bus = to_pci_bus(dev); | |
381 | ||
9a994e8e | 382 | if (kstrtoul(buf, 0, &val) < 0) |
b9d320fc YL |
383 | return -EINVAL; |
384 | ||
385 | if (val) { | |
9d16947b | 386 | pci_lock_rescan_remove(); |
2f320521 YL |
387 | if (!pci_is_root_bus(bus) && list_empty(&bus->devices)) |
388 | pci_rescan_bus_bridge_resize(bus->self); | |
389 | else | |
390 | pci_rescan_bus(bus); | |
9d16947b | 391 | pci_unlock_rescan_remove(); |
b9d320fc YL |
392 | } |
393 | return count; | |
394 | } | |
56039e65 | 395 | static DEVICE_ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store); |
b9d320fc | 396 | |
fbb988be | 397 | #if defined(CONFIG_PM) && defined(CONFIG_ACPI) |
448bd857 HY |
398 | static ssize_t d3cold_allowed_store(struct device *dev, |
399 | struct device_attribute *attr, | |
400 | const char *buf, size_t count) | |
401 | { | |
402 | struct pci_dev *pdev = to_pci_dev(dev); | |
403 | unsigned long val; | |
404 | ||
9a994e8e | 405 | if (kstrtoul(buf, 0, &val) < 0) |
448bd857 HY |
406 | return -EINVAL; |
407 | ||
408 | pdev->d3cold_allowed = !!val; | |
409 | pm_runtime_resume(dev); | |
410 | ||
411 | return count; | |
412 | } | |
413 | ||
414 | static ssize_t d3cold_allowed_show(struct device *dev, | |
415 | struct device_attribute *attr, char *buf) | |
416 | { | |
417 | struct pci_dev *pdev = to_pci_dev(dev); | |
3c78bc61 | 418 | return sprintf(buf, "%u\n", pdev->d3cold_allowed); |
448bd857 | 419 | } |
5136b2da | 420 | static DEVICE_ATTR_RW(d3cold_allowed); |
448bd857 HY |
421 | #endif |
422 | ||
dfc73e7a SO |
423 | #ifdef CONFIG_OF |
424 | static ssize_t devspec_show(struct device *dev, | |
425 | struct device_attribute *attr, char *buf) | |
426 | { | |
427 | struct pci_dev *pdev = to_pci_dev(dev); | |
428 | struct device_node *np = pci_device_to_OF_node(pdev); | |
429 | ||
430 | if (np == NULL || np->full_name == NULL) | |
431 | return 0; | |
432 | return sprintf(buf, "%s", np->full_name); | |
433 | } | |
434 | static DEVICE_ATTR_RO(devspec); | |
435 | #endif | |
436 | ||
1789382a DD |
437 | #ifdef CONFIG_PCI_IOV |
438 | static ssize_t sriov_totalvfs_show(struct device *dev, | |
439 | struct device_attribute *attr, | |
440 | char *buf) | |
441 | { | |
442 | struct pci_dev *pdev = to_pci_dev(dev); | |
443 | ||
bff73156 | 444 | return sprintf(buf, "%u\n", pci_sriov_get_totalvfs(pdev)); |
1789382a DD |
445 | } |
446 | ||
447 | ||
448 | static ssize_t sriov_numvfs_show(struct device *dev, | |
449 | struct device_attribute *attr, | |
450 | char *buf) | |
451 | { | |
452 | struct pci_dev *pdev = to_pci_dev(dev); | |
453 | ||
6b136724 | 454 | return sprintf(buf, "%u\n", pdev->sriov->num_VFs); |
1789382a DD |
455 | } |
456 | ||
457 | /* | |
faa48a50 BH |
458 | * num_vfs > 0; number of VFs to enable |
459 | * num_vfs = 0; disable all VFs | |
1789382a DD |
460 | * |
461 | * Note: SRIOV spec doesn't allow partial VF | |
faa48a50 | 462 | * disable, so it's all or none. |
1789382a DD |
463 | */ |
464 | static ssize_t sriov_numvfs_store(struct device *dev, | |
465 | struct device_attribute *attr, | |
466 | const char *buf, size_t count) | |
467 | { | |
468 | struct pci_dev *pdev = to_pci_dev(dev); | |
faa48a50 BH |
469 | int ret; |
470 | u16 num_vfs; | |
1789382a | 471 | |
faa48a50 BH |
472 | ret = kstrtou16(buf, 0, &num_vfs); |
473 | if (ret < 0) | |
474 | return ret; | |
475 | ||
476 | if (num_vfs > pci_sriov_get_totalvfs(pdev)) | |
477 | return -ERANGE; | |
478 | ||
479 | if (num_vfs == pdev->sriov->num_VFs) | |
480 | return count; /* no change */ | |
1789382a DD |
481 | |
482 | /* is PF driver loaded w/callback */ | |
483 | if (!pdev->driver || !pdev->driver->sriov_configure) { | |
faa48a50 | 484 | dev_info(&pdev->dev, "Driver doesn't support SRIOV configuration via sysfs\n"); |
1789382a DD |
485 | return -ENOSYS; |
486 | } | |
487 | ||
faa48a50 BH |
488 | if (num_vfs == 0) { |
489 | /* disable VFs */ | |
490 | ret = pdev->driver->sriov_configure(pdev, 0); | |
491 | if (ret < 0) | |
492 | return ret; | |
493 | return count; | |
1789382a DD |
494 | } |
495 | ||
faa48a50 BH |
496 | /* enable VFs */ |
497 | if (pdev->sriov->num_VFs) { | |
498 | dev_warn(&pdev->dev, "%d VFs already enabled. Disable before enabling %d VFs\n", | |
499 | pdev->sriov->num_VFs, num_vfs); | |
500 | return -EBUSY; | |
1789382a DD |
501 | } |
502 | ||
faa48a50 BH |
503 | ret = pdev->driver->sriov_configure(pdev, num_vfs); |
504 | if (ret < 0) | |
505 | return ret; | |
1789382a | 506 | |
faa48a50 BH |
507 | if (ret != num_vfs) |
508 | dev_warn(&pdev->dev, "%d VFs requested; only %d enabled\n", | |
509 | num_vfs, ret); | |
510 | ||
511 | return count; | |
1789382a DD |
512 | } |
513 | ||
514 | static struct device_attribute sriov_totalvfs_attr = __ATTR_RO(sriov_totalvfs); | |
515 | static struct device_attribute sriov_numvfs_attr = | |
516 | __ATTR(sriov_numvfs, (S_IRUGO|S_IWUSR|S_IWGRP), | |
517 | sriov_numvfs_show, sriov_numvfs_store); | |
518 | #endif /* CONFIG_PCI_IOV */ | |
519 | ||
782a985d AW |
520 | static ssize_t driver_override_store(struct device *dev, |
521 | struct device_attribute *attr, | |
522 | const char *buf, size_t count) | |
523 | { | |
524 | struct pci_dev *pdev = to_pci_dev(dev); | |
b08dc7d4 | 525 | char *driver_override, *old, *cp; |
782a985d | 526 | |
4efe874a SL |
527 | /* We need to keep extra room for a newline */ |
528 | if (count >= (PAGE_SIZE - 1)) | |
782a985d AW |
529 | return -EINVAL; |
530 | ||
531 | driver_override = kstrndup(buf, count, GFP_KERNEL); | |
532 | if (!driver_override) | |
533 | return -ENOMEM; | |
534 | ||
535 | cp = strchr(driver_override, '\n'); | |
536 | if (cp) | |
537 | *cp = '\0'; | |
538 | ||
b08dc7d4 NS |
539 | device_lock(dev); |
540 | old = pdev->driver_override; | |
782a985d AW |
541 | if (strlen(driver_override)) { |
542 | pdev->driver_override = driver_override; | |
543 | } else { | |
544 | kfree(driver_override); | |
545 | pdev->driver_override = NULL; | |
546 | } | |
b08dc7d4 | 547 | device_unlock(dev); |
782a985d AW |
548 | |
549 | kfree(old); | |
550 | ||
551 | return count; | |
552 | } | |
553 | ||
554 | static ssize_t driver_override_show(struct device *dev, | |
555 | struct device_attribute *attr, char *buf) | |
556 | { | |
557 | struct pci_dev *pdev = to_pci_dev(dev); | |
b08dc7d4 | 558 | ssize_t len; |
782a985d | 559 | |
b08dc7d4 | 560 | device_lock(dev); |
1cac41cb | 561 | len = sprintf(buf, "%s\n", pdev->driver_override); |
b08dc7d4 NS |
562 | device_unlock(dev); |
563 | return len; | |
782a985d AW |
564 | } |
565 | static DEVICE_ATTR_RW(driver_override); | |
566 | ||
bf22c90f | 567 | static struct attribute *pci_dev_attrs[] = { |
5136b2da GKH |
568 | &dev_attr_resource.attr, |
569 | &dev_attr_vendor.attr, | |
570 | &dev_attr_device.attr, | |
571 | &dev_attr_subsystem_vendor.attr, | |
572 | &dev_attr_subsystem_device.attr, | |
573 | &dev_attr_class.attr, | |
574 | &dev_attr_irq.attr, | |
575 | &dev_attr_local_cpus.attr, | |
576 | &dev_attr_local_cpulist.attr, | |
577 | &dev_attr_modalias.attr, | |
81bb0e19 | 578 | #ifdef CONFIG_NUMA |
5136b2da | 579 | &dev_attr_numa_node.attr, |
81bb0e19 | 580 | #endif |
5136b2da GKH |
581 | &dev_attr_dma_mask_bits.attr, |
582 | &dev_attr_consistent_dma_mask_bits.attr, | |
d8e7d53a | 583 | &dev_attr_enable.attr, |
5136b2da GKH |
584 | &dev_attr_broken_parity_status.attr, |
585 | &dev_attr_msi_bus.attr, | |
fbb988be | 586 | #if defined(CONFIG_PM) && defined(CONFIG_ACPI) |
5136b2da | 587 | &dev_attr_d3cold_allowed.attr, |
dfc73e7a SO |
588 | #endif |
589 | #ifdef CONFIG_OF | |
590 | &dev_attr_devspec.attr, | |
77c27c7b | 591 | #endif |
782a985d | 592 | &dev_attr_driver_override.attr, |
5136b2da GKH |
593 | NULL, |
594 | }; | |
595 | ||
596 | static const struct attribute_group pci_dev_group = { | |
597 | .attrs = pci_dev_attrs, | |
598 | }; | |
599 | ||
600 | const struct attribute_group *pci_dev_groups[] = { | |
601 | &pci_dev_group, | |
602 | NULL, | |
1da177e4 LT |
603 | }; |
604 | ||
56039e65 GKH |
605 | static struct attribute *pcibus_attrs[] = { |
606 | &dev_attr_rescan.attr, | |
607 | &dev_attr_cpuaffinity.attr, | |
608 | &dev_attr_cpulistaffinity.attr, | |
609 | NULL, | |
610 | }; | |
611 | ||
612 | static const struct attribute_group pcibus_group = { | |
613 | .attrs = pcibus_attrs, | |
614 | }; | |
615 | ||
616 | const struct attribute_group *pcibus_groups[] = { | |
617 | &pcibus_group, | |
618 | NULL, | |
b9d320fc YL |
619 | }; |
620 | ||
3c78bc61 RD |
621 | static ssize_t boot_vga_show(struct device *dev, struct device_attribute *attr, |
622 | char *buf) | |
217f45de DA |
623 | { |
624 | struct pci_dev *pdev = to_pci_dev(dev); | |
1a39b310 MG |
625 | struct pci_dev *vga_dev = vga_default_device(); |
626 | ||
627 | if (vga_dev) | |
628 | return sprintf(buf, "%u\n", (pdev == vga_dev)); | |
217f45de DA |
629 | |
630 | return sprintf(buf, "%u\n", | |
631 | !!(pdev->resource[PCI_ROM_RESOURCE].flags & | |
632 | IORESOURCE_ROM_SHADOW)); | |
633 | } | |
bf22c90f | 634 | static struct device_attribute vga_attr = __ATTR_RO(boot_vga); |
217f45de | 635 | |
3c78bc61 RD |
636 | static ssize_t pci_read_config(struct file *filp, struct kobject *kobj, |
637 | struct bin_attribute *bin_attr, char *buf, | |
638 | loff_t off, size_t count) | |
1da177e4 | 639 | { |
3c78bc61 RD |
640 | struct pci_dev *dev = to_pci_dev(container_of(kobj, struct device, |
641 | kobj)); | |
1da177e4 LT |
642 | unsigned int size = 64; |
643 | loff_t init_off = off; | |
3c78bc61 | 644 | u8 *data = (u8 *) buf; |
1da177e4 LT |
645 | |
646 | /* Several chips lock up trying to read undefined config space */ | |
3c78bc61 | 647 | if (security_capable(filp->f_cred, &init_user_ns, CAP_SYS_ADMIN) == 0) |
1da177e4 | 648 | size = dev->cfg_size; |
3c78bc61 | 649 | else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) |
1da177e4 | 650 | size = 128; |
1da177e4 LT |
651 | |
652 | if (off > size) | |
653 | return 0; | |
654 | if (off + count > size) { | |
655 | size -= off; | |
656 | count = size; | |
657 | } else { | |
658 | size = count; | |
659 | } | |
660 | ||
3d8387ef HY |
661 | pci_config_pm_runtime_get(dev); |
662 | ||
4c0619ad SS |
663 | if ((off & 1) && size) { |
664 | u8 val; | |
e04b0ea2 | 665 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 666 | data[off - init_off] = val; |
1da177e4 | 667 | off++; |
4c0619ad SS |
668 | size--; |
669 | } | |
670 | ||
671 | if ((off & 3) && size > 2) { | |
672 | u16 val; | |
e04b0ea2 | 673 | pci_user_read_config_word(dev, off, &val); |
4c0619ad SS |
674 | data[off - init_off] = val & 0xff; |
675 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
676 | off += 2; | |
677 | size -= 2; | |
1da177e4 LT |
678 | } |
679 | ||
680 | while (size > 3) { | |
4c0619ad | 681 | u32 val; |
e04b0ea2 | 682 | pci_user_read_config_dword(dev, off, &val); |
4c0619ad SS |
683 | data[off - init_off] = val & 0xff; |
684 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
685 | data[off - init_off + 2] = (val >> 16) & 0xff; | |
686 | data[off - init_off + 3] = (val >> 24) & 0xff; | |
1da177e4 LT |
687 | off += 4; |
688 | size -= 4; | |
689 | } | |
690 | ||
4c0619ad SS |
691 | if (size >= 2) { |
692 | u16 val; | |
e04b0ea2 | 693 | pci_user_read_config_word(dev, off, &val); |
4c0619ad SS |
694 | data[off - init_off] = val & 0xff; |
695 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
696 | off += 2; | |
697 | size -= 2; | |
698 | } | |
699 | ||
700 | if (size > 0) { | |
701 | u8 val; | |
e04b0ea2 | 702 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 703 | data[off - init_off] = val; |
1da177e4 LT |
704 | off++; |
705 | --size; | |
706 | } | |
707 | ||
3d8387ef HY |
708 | pci_config_pm_runtime_put(dev); |
709 | ||
1da177e4 LT |
710 | return count; |
711 | } | |
712 | ||
3c78bc61 RD |
713 | static ssize_t pci_write_config(struct file *filp, struct kobject *kobj, |
714 | struct bin_attribute *bin_attr, char *buf, | |
715 | loff_t off, size_t count) | |
1da177e4 | 716 | { |
3c78bc61 RD |
717 | struct pci_dev *dev = to_pci_dev(container_of(kobj, struct device, |
718 | kobj)); | |
1da177e4 LT |
719 | unsigned int size = count; |
720 | loff_t init_off = off; | |
3c78bc61 | 721 | u8 *data = (u8 *) buf; |
1da177e4 LT |
722 | |
723 | if (off > dev->cfg_size) | |
724 | return 0; | |
725 | if (off + count > dev->cfg_size) { | |
726 | size = dev->cfg_size - off; | |
727 | count = size; | |
728 | } | |
f7625980 | 729 | |
3d8387ef HY |
730 | pci_config_pm_runtime_get(dev); |
731 | ||
4c0619ad | 732 | if ((off & 1) && size) { |
e04b0ea2 | 733 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 | 734 | off++; |
4c0619ad | 735 | size--; |
1da177e4 | 736 | } |
f7625980 | 737 | |
4c0619ad SS |
738 | if ((off & 3) && size > 2) { |
739 | u16 val = data[off - init_off]; | |
740 | val |= (u16) data[off - init_off + 1] << 8; | |
3c78bc61 RD |
741 | pci_user_write_config_word(dev, off, val); |
742 | off += 2; | |
743 | size -= 2; | |
744 | } | |
1da177e4 LT |
745 | |
746 | while (size > 3) { | |
4c0619ad SS |
747 | u32 val = data[off - init_off]; |
748 | val |= (u32) data[off - init_off + 1] << 8; | |
749 | val |= (u32) data[off - init_off + 2] << 16; | |
750 | val |= (u32) data[off - init_off + 3] << 24; | |
e04b0ea2 | 751 | pci_user_write_config_dword(dev, off, val); |
1da177e4 LT |
752 | off += 4; |
753 | size -= 4; | |
754 | } | |
f7625980 | 755 | |
4c0619ad SS |
756 | if (size >= 2) { |
757 | u16 val = data[off - init_off]; | |
758 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 759 | pci_user_write_config_word(dev, off, val); |
4c0619ad SS |
760 | off += 2; |
761 | size -= 2; | |
762 | } | |
1da177e4 | 763 | |
4c0619ad | 764 | if (size) { |
e04b0ea2 | 765 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 LT |
766 | off++; |
767 | --size; | |
768 | } | |
769 | ||
3d8387ef HY |
770 | pci_config_pm_runtime_put(dev); |
771 | ||
1da177e4 LT |
772 | return count; |
773 | } | |
774 | ||
3c78bc61 RD |
775 | static ssize_t read_vpd_attr(struct file *filp, struct kobject *kobj, |
776 | struct bin_attribute *bin_attr, char *buf, | |
777 | loff_t off, size_t count) | |
94e61088 BH |
778 | { |
779 | struct pci_dev *dev = | |
780 | to_pci_dev(container_of(kobj, struct device, kobj)); | |
94e61088 BH |
781 | |
782 | if (off > bin_attr->size) | |
783 | count = 0; | |
784 | else if (count > bin_attr->size - off) | |
785 | count = bin_attr->size - off; | |
94e61088 | 786 | |
287d19ce | 787 | return pci_read_vpd(dev, off, count, buf); |
94e61088 BH |
788 | } |
789 | ||
3c78bc61 RD |
790 | static ssize_t write_vpd_attr(struct file *filp, struct kobject *kobj, |
791 | struct bin_attribute *bin_attr, char *buf, | |
792 | loff_t off, size_t count) | |
94e61088 BH |
793 | { |
794 | struct pci_dev *dev = | |
795 | to_pci_dev(container_of(kobj, struct device, kobj)); | |
94e61088 BH |
796 | |
797 | if (off > bin_attr->size) | |
798 | count = 0; | |
799 | else if (count > bin_attr->size - off) | |
800 | count = bin_attr->size - off; | |
94e61088 | 801 | |
287d19ce | 802 | return pci_write_vpd(dev, off, count, buf); |
94e61088 BH |
803 | } |
804 | ||
1da177e4 LT |
805 | #ifdef HAVE_PCI_LEGACY |
806 | /** | |
807 | * pci_read_legacy_io - read byte(s) from legacy I/O port space | |
2c3c8bea | 808 | * @filp: open sysfs file |
1da177e4 | 809 | * @kobj: kobject corresponding to file to read from |
cffb2faf | 810 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
811 | * @buf: buffer to store results |
812 | * @off: offset into legacy I/O port space | |
813 | * @count: number of bytes to read | |
814 | * | |
815 | * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
816 | * callback routine (pci_legacy_read). | |
817 | */ | |
3c78bc61 RD |
818 | static ssize_t pci_read_legacy_io(struct file *filp, struct kobject *kobj, |
819 | struct bin_attribute *bin_attr, char *buf, | |
820 | loff_t off, size_t count) | |
1da177e4 | 821 | { |
3c78bc61 | 822 | struct pci_bus *bus = to_pci_bus(container_of(kobj, struct device, |
1da177e4 LT |
823 | kobj)); |
824 | ||
3c78bc61 RD |
825 | /* Only support 1, 2 or 4 byte accesses */ |
826 | if (count != 1 && count != 2 && count != 4) | |
827 | return -EINVAL; | |
1da177e4 | 828 | |
3c78bc61 | 829 | return pci_legacy_read(bus, off, (u32 *)buf, count); |
1da177e4 LT |
830 | } |
831 | ||
832 | /** | |
833 | * pci_write_legacy_io - write byte(s) to legacy I/O port space | |
2c3c8bea | 834 | * @filp: open sysfs file |
1da177e4 | 835 | * @kobj: kobject corresponding to file to read from |
cffb2faf | 836 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
837 | * @buf: buffer containing value to be written |
838 | * @off: offset into legacy I/O port space | |
839 | * @count: number of bytes to write | |
840 | * | |
841 | * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
842 | * callback routine (pci_legacy_write). | |
843 | */ | |
3c78bc61 RD |
844 | static ssize_t pci_write_legacy_io(struct file *filp, struct kobject *kobj, |
845 | struct bin_attribute *bin_attr, char *buf, | |
846 | loff_t off, size_t count) | |
1da177e4 | 847 | { |
3c78bc61 | 848 | struct pci_bus *bus = to_pci_bus(container_of(kobj, struct device, |
1da177e4 | 849 | kobj)); |
1da177e4 | 850 | |
3c78bc61 RD |
851 | /* Only support 1, 2 or 4 byte accesses */ |
852 | if (count != 1 && count != 2 && count != 4) | |
853 | return -EINVAL; | |
854 | ||
855 | return pci_legacy_write(bus, off, *(u32 *)buf, count); | |
1da177e4 LT |
856 | } |
857 | ||
858 | /** | |
859 | * pci_mmap_legacy_mem - map legacy PCI memory into user memory space | |
2c3c8bea | 860 | * @filp: open sysfs file |
1da177e4 LT |
861 | * @kobj: kobject corresponding to device to be mapped |
862 | * @attr: struct bin_attribute for this file | |
863 | * @vma: struct vm_area_struct passed to mmap | |
864 | * | |
f19aeb1f | 865 | * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap |
1da177e4 LT |
866 | * legacy memory space (first meg of bus space) into application virtual |
867 | * memory space. | |
868 | */ | |
3c78bc61 RD |
869 | static int pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj, |
870 | struct bin_attribute *attr, | |
871 | struct vm_area_struct *vma) | |
1da177e4 | 872 | { |
3c78bc61 | 873 | struct pci_bus *bus = to_pci_bus(container_of(kobj, struct device, |
1da177e4 LT |
874 | kobj)); |
875 | ||
3c78bc61 | 876 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem); |
f19aeb1f BH |
877 | } |
878 | ||
879 | /** | |
880 | * pci_mmap_legacy_io - map legacy PCI IO into user memory space | |
2c3c8bea | 881 | * @filp: open sysfs file |
f19aeb1f BH |
882 | * @kobj: kobject corresponding to device to be mapped |
883 | * @attr: struct bin_attribute for this file | |
884 | * @vma: struct vm_area_struct passed to mmap | |
885 | * | |
886 | * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap | |
887 | * legacy IO space (first meg of bus space) into application virtual | |
888 | * memory space. Returns -ENOSYS if the operation isn't supported | |
889 | */ | |
3c78bc61 RD |
890 | static int pci_mmap_legacy_io(struct file *filp, struct kobject *kobj, |
891 | struct bin_attribute *attr, | |
892 | struct vm_area_struct *vma) | |
f19aeb1f | 893 | { |
3c78bc61 | 894 | struct pci_bus *bus = to_pci_bus(container_of(kobj, struct device, |
f19aeb1f BH |
895 | kobj)); |
896 | ||
3c78bc61 | 897 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io); |
f19aeb1f BH |
898 | } |
899 | ||
10a0ef39 IK |
900 | /** |
901 | * pci_adjust_legacy_attr - adjustment of legacy file attributes | |
902 | * @b: bus to create files under | |
903 | * @mmap_type: I/O port or memory | |
904 | * | |
905 | * Stub implementation. Can be overridden by arch if necessary. | |
906 | */ | |
3c78bc61 RD |
907 | void __weak pci_adjust_legacy_attr(struct pci_bus *b, |
908 | enum pci_mmap_state mmap_type) | |
10a0ef39 | 909 | { |
10a0ef39 IK |
910 | } |
911 | ||
f19aeb1f BH |
912 | /** |
913 | * pci_create_legacy_files - create legacy I/O port and memory files | |
914 | * @b: bus to create files under | |
915 | * | |
916 | * Some platforms allow access to legacy I/O port and ISA memory space on | |
917 | * a per-bus basis. This routine creates the files and ties them into | |
918 | * their associated read, write and mmap files from pci-sysfs.c | |
919 | * | |
25985edc | 920 | * On error unwind, but don't propagate the error to the caller |
f19aeb1f BH |
921 | * as it is ok to set up the PCI bus without these files. |
922 | */ | |
923 | void pci_create_legacy_files(struct pci_bus *b) | |
924 | { | |
925 | int error; | |
926 | ||
927 | b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2, | |
928 | GFP_ATOMIC); | |
929 | if (!b->legacy_io) | |
930 | goto kzalloc_err; | |
931 | ||
62e877b8 | 932 | sysfs_bin_attr_init(b->legacy_io); |
f19aeb1f BH |
933 | b->legacy_io->attr.name = "legacy_io"; |
934 | b->legacy_io->size = 0xffff; | |
935 | b->legacy_io->attr.mode = S_IRUSR | S_IWUSR; | |
936 | b->legacy_io->read = pci_read_legacy_io; | |
937 | b->legacy_io->write = pci_write_legacy_io; | |
938 | b->legacy_io->mmap = pci_mmap_legacy_io; | |
10a0ef39 | 939 | pci_adjust_legacy_attr(b, pci_mmap_io); |
f19aeb1f BH |
940 | error = device_create_bin_file(&b->dev, b->legacy_io); |
941 | if (error) | |
942 | goto legacy_io_err; | |
943 | ||
944 | /* Allocated above after the legacy_io struct */ | |
945 | b->legacy_mem = b->legacy_io + 1; | |
6757eca3 | 946 | sysfs_bin_attr_init(b->legacy_mem); |
f19aeb1f BH |
947 | b->legacy_mem->attr.name = "legacy_mem"; |
948 | b->legacy_mem->size = 1024*1024; | |
949 | b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR; | |
950 | b->legacy_mem->mmap = pci_mmap_legacy_mem; | |
10a0ef39 | 951 | pci_adjust_legacy_attr(b, pci_mmap_mem); |
f19aeb1f BH |
952 | error = device_create_bin_file(&b->dev, b->legacy_mem); |
953 | if (error) | |
954 | goto legacy_mem_err; | |
955 | ||
956 | return; | |
957 | ||
958 | legacy_mem_err: | |
959 | device_remove_bin_file(&b->dev, b->legacy_io); | |
960 | legacy_io_err: | |
961 | kfree(b->legacy_io); | |
962 | b->legacy_io = NULL; | |
963 | kzalloc_err: | |
227f0647 | 964 | printk(KERN_WARNING "pci: warning: could not create legacy I/O port and ISA memory resources to sysfs\n"); |
f19aeb1f BH |
965 | return; |
966 | } | |
967 | ||
968 | void pci_remove_legacy_files(struct pci_bus *b) | |
969 | { | |
970 | if (b->legacy_io) { | |
971 | device_remove_bin_file(&b->dev, b->legacy_io); | |
972 | device_remove_bin_file(&b->dev, b->legacy_mem); | |
973 | kfree(b->legacy_io); /* both are allocated here */ | |
974 | } | |
1da177e4 LT |
975 | } |
976 | #endif /* HAVE_PCI_LEGACY */ | |
977 | ||
978 | #ifdef HAVE_PCI_MMAP | |
b5ff7df3 | 979 | |
3b519e4e MW |
980 | int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma, |
981 | enum pci_mmap_api mmap_api) | |
b5ff7df3 | 982 | { |
5f36c8b4 DW |
983 | unsigned long nr, start, size; |
984 | resource_size_t pci_start = 0, pci_end; | |
b5ff7df3 | 985 | |
3b519e4e MW |
986 | if (pci_resource_len(pdev, resno) == 0) |
987 | return 0; | |
64b00175 | 988 | nr = vma_pages(vma); |
b5ff7df3 | 989 | start = vma->vm_pgoff; |
88e7df0b | 990 | size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1; |
5f36c8b4 DW |
991 | if (mmap_api == PCI_MMAP_PROCFS) { |
992 | pci_resource_to_user(pdev, resno, &pdev->resource[resno], | |
993 | &pci_start, &pci_end); | |
994 | pci_start >>= PAGE_SHIFT; | |
995 | } | |
3b519e4e MW |
996 | if (start >= pci_start && start < pci_start + size && |
997 | start + nr <= pci_start + size) | |
b5ff7df3 | 998 | return 1; |
b5ff7df3 LT |
999 | return 0; |
1000 | } | |
1001 | ||
1da177e4 LT |
1002 | /** |
1003 | * pci_mmap_resource - map a PCI resource into user memory space | |
1004 | * @kobj: kobject for mapping | |
1005 | * @attr: struct bin_attribute for the file being mapped | |
1006 | * @vma: struct vm_area_struct passed into the mmap | |
45aec1ae | 1007 | * @write_combine: 1 for write_combine mapping |
1da177e4 LT |
1008 | * |
1009 | * Use the regular PCI mapping routines to map a PCI resource into userspace. | |
1da177e4 | 1010 | */ |
3c78bc61 RD |
1011 | static int pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr, |
1012 | struct vm_area_struct *vma, int write_combine) | |
1da177e4 LT |
1013 | { |
1014 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, | |
1015 | struct device, kobj)); | |
a3f5835a | 1016 | struct resource *res = attr->private; |
1da177e4 | 1017 | enum pci_mmap_state mmap_type; |
e31dd6e4 | 1018 | resource_size_t start, end; |
2311b1f2 | 1019 | int i; |
1da177e4 | 1020 | |
2311b1f2 ME |
1021 | for (i = 0; i < PCI_ROM_RESOURCE; i++) |
1022 | if (res == &pdev->resource[i]) | |
1023 | break; | |
1024 | if (i >= PCI_ROM_RESOURCE) | |
1025 | return -ENODEV; | |
1026 | ||
3b519e4e | 1027 | if (!pci_mmap_fits(pdev, i, vma, PCI_MMAP_SYSFS)) { |
227f0647 | 1028 | 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 MW |
1029 | current->comm, vma->vm_end-vma->vm_start, vma->vm_pgoff, |
1030 | pci_name(pdev), i, | |
e25cd062 RD |
1031 | (u64)pci_resource_start(pdev, i), |
1032 | (u64)pci_resource_len(pdev, i)); | |
b5ff7df3 | 1033 | return -EINVAL; |
3b519e4e | 1034 | } |
b5ff7df3 | 1035 | |
2311b1f2 ME |
1036 | /* pci_mmap_page_range() expects the same kind of entry as coming |
1037 | * from /proc/bus/pci/ which is a "user visible" value. If this is | |
1038 | * different from the resource itself, arch will do necessary fixup. | |
1039 | */ | |
1040 | pci_resource_to_user(pdev, i, res, &start, &end); | |
1041 | vma->vm_pgoff += start >> PAGE_SHIFT; | |
1da177e4 LT |
1042 | mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io; |
1043 | ||
e8de1481 AV |
1044 | if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(start)) |
1045 | return -EINVAL; | |
1046 | ||
45aec1ae | 1047 | return pci_mmap_page_range(pdev, vma, mmap_type, write_combine); |
1048 | } | |
1049 | ||
3c78bc61 RD |
1050 | static int pci_mmap_resource_uc(struct file *filp, struct kobject *kobj, |
1051 | struct bin_attribute *attr, | |
1052 | struct vm_area_struct *vma) | |
45aec1ae | 1053 | { |
1054 | return pci_mmap_resource(kobj, attr, vma, 0); | |
1055 | } | |
1056 | ||
3c78bc61 RD |
1057 | static int pci_mmap_resource_wc(struct file *filp, struct kobject *kobj, |
1058 | struct bin_attribute *attr, | |
1059 | struct vm_area_struct *vma) | |
45aec1ae | 1060 | { |
1061 | return pci_mmap_resource(kobj, attr, vma, 1); | |
1da177e4 LT |
1062 | } |
1063 | ||
3c78bc61 RD |
1064 | static ssize_t pci_resource_io(struct file *filp, struct kobject *kobj, |
1065 | struct bin_attribute *attr, char *buf, | |
1066 | loff_t off, size_t count, bool write) | |
8633328b AW |
1067 | { |
1068 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, | |
1069 | struct device, kobj)); | |
1070 | struct resource *res = attr->private; | |
1071 | unsigned long port = off; | |
1072 | int i; | |
1073 | ||
1074 | for (i = 0; i < PCI_ROM_RESOURCE; i++) | |
1075 | if (res == &pdev->resource[i]) | |
1076 | break; | |
1077 | if (i >= PCI_ROM_RESOURCE) | |
1078 | return -ENODEV; | |
1079 | ||
1080 | port += pci_resource_start(pdev, i); | |
1081 | ||
1082 | if (port > pci_resource_end(pdev, i)) | |
1083 | return 0; | |
1084 | ||
1085 | if (port + count - 1 > pci_resource_end(pdev, i)) | |
1086 | return -EINVAL; | |
1087 | ||
1088 | switch (count) { | |
1089 | case 1: | |
1090 | if (write) | |
1091 | outb(*(u8 *)buf, port); | |
1092 | else | |
1093 | *(u8 *)buf = inb(port); | |
1094 | return 1; | |
1095 | case 2: | |
1096 | if (write) | |
1097 | outw(*(u16 *)buf, port); | |
1098 | else | |
1099 | *(u16 *)buf = inw(port); | |
1100 | return 2; | |
1101 | case 4: | |
1102 | if (write) | |
1103 | outl(*(u32 *)buf, port); | |
1104 | else | |
1105 | *(u32 *)buf = inl(port); | |
1106 | return 4; | |
1107 | } | |
1108 | return -EINVAL; | |
1109 | } | |
1110 | ||
3c78bc61 RD |
1111 | static ssize_t pci_read_resource_io(struct file *filp, struct kobject *kobj, |
1112 | struct bin_attribute *attr, char *buf, | |
1113 | loff_t off, size_t count) | |
8633328b AW |
1114 | { |
1115 | return pci_resource_io(filp, kobj, attr, buf, off, count, false); | |
1116 | } | |
1117 | ||
3c78bc61 RD |
1118 | static ssize_t pci_write_resource_io(struct file *filp, struct kobject *kobj, |
1119 | struct bin_attribute *attr, char *buf, | |
1120 | loff_t off, size_t count) | |
8633328b AW |
1121 | { |
1122 | return pci_resource_io(filp, kobj, attr, buf, off, count, true); | |
1123 | } | |
1124 | ||
b19441af GKH |
1125 | /** |
1126 | * pci_remove_resource_files - cleanup resource files | |
cffb2faf | 1127 | * @pdev: dev to cleanup |
b19441af | 1128 | * |
cffb2faf | 1129 | * If we created resource files for @pdev, remove them from sysfs and |
b19441af GKH |
1130 | * free their resources. |
1131 | */ | |
3c78bc61 | 1132 | static void pci_remove_resource_files(struct pci_dev *pdev) |
b19441af GKH |
1133 | { |
1134 | int i; | |
1135 | ||
1136 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
1137 | struct bin_attribute *res_attr; | |
1138 | ||
1139 | res_attr = pdev->res_attr[i]; | |
1140 | if (res_attr) { | |
1141 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
1142 | kfree(res_attr); | |
1143 | } | |
45aec1ae | 1144 | |
1145 | res_attr = pdev->res_attr_wc[i]; | |
1146 | if (res_attr) { | |
1147 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
1148 | kfree(res_attr); | |
1149 | } | |
b19441af GKH |
1150 | } |
1151 | } | |
1152 | ||
45aec1ae | 1153 | static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine) |
1154 | { | |
1155 | /* allocate attribute structure, piggyback attribute name */ | |
1156 | int name_len = write_combine ? 13 : 10; | |
1157 | struct bin_attribute *res_attr; | |
1158 | int retval; | |
1159 | ||
1160 | res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC); | |
1161 | if (res_attr) { | |
1162 | char *res_attr_name = (char *)(res_attr + 1); | |
1163 | ||
a07e4156 | 1164 | sysfs_bin_attr_init(res_attr); |
45aec1ae | 1165 | if (write_combine) { |
1166 | pdev->res_attr_wc[num] = res_attr; | |
1167 | sprintf(res_attr_name, "resource%d_wc", num); | |
1168 | res_attr->mmap = pci_mmap_resource_wc; | |
1169 | } else { | |
1170 | pdev->res_attr[num] = res_attr; | |
1171 | sprintf(res_attr_name, "resource%d", num); | |
1172 | res_attr->mmap = pci_mmap_resource_uc; | |
1173 | } | |
8633328b AW |
1174 | if (pci_resource_flags(pdev, num) & IORESOURCE_IO) { |
1175 | res_attr->read = pci_read_resource_io; | |
1176 | res_attr->write = pci_write_resource_io; | |
1177 | } | |
45aec1ae | 1178 | res_attr->attr.name = res_attr_name; |
1179 | res_attr->attr.mode = S_IRUSR | S_IWUSR; | |
1180 | res_attr->size = pci_resource_len(pdev, num); | |
1181 | res_attr->private = &pdev->resource[num]; | |
1182 | retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr); | |
1183 | } else | |
1184 | retval = -ENOMEM; | |
1185 | ||
1186 | return retval; | |
1187 | } | |
1188 | ||
1da177e4 LT |
1189 | /** |
1190 | * pci_create_resource_files - create resource files in sysfs for @dev | |
cffb2faf | 1191 | * @pdev: dev in question |
1da177e4 | 1192 | * |
cffb2faf | 1193 | * Walk the resources in @pdev creating files for each resource available. |
1da177e4 | 1194 | */ |
b19441af | 1195 | static int pci_create_resource_files(struct pci_dev *pdev) |
1da177e4 LT |
1196 | { |
1197 | int i; | |
b19441af | 1198 | int retval; |
1da177e4 LT |
1199 | |
1200 | /* Expose the PCI resources from this device as files */ | |
1201 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
1da177e4 LT |
1202 | |
1203 | /* skip empty resources */ | |
1204 | if (!pci_resource_len(pdev, i)) | |
1205 | continue; | |
1206 | ||
45aec1ae | 1207 | retval = pci_create_attr(pdev, i, 0); |
1208 | /* for prefetchable resources, create a WC mappable file */ | |
1209 | if (!retval && pdev->resource[i].flags & IORESOURCE_PREFETCH) | |
1210 | retval = pci_create_attr(pdev, i, 1); | |
1211 | ||
1212 | if (retval) { | |
1213 | pci_remove_resource_files(pdev); | |
1214 | return retval; | |
1da177e4 LT |
1215 | } |
1216 | } | |
b19441af | 1217 | return 0; |
1da177e4 LT |
1218 | } |
1219 | #else /* !HAVE_PCI_MMAP */ | |
10a0ef39 IK |
1220 | int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; } |
1221 | void __weak pci_remove_resource_files(struct pci_dev *dev) { return; } | |
1da177e4 LT |
1222 | #endif /* HAVE_PCI_MMAP */ |
1223 | ||
1224 | /** | |
1225 | * pci_write_rom - used to enable access to the PCI ROM display | |
2c3c8bea | 1226 | * @filp: sysfs file |
1da177e4 | 1227 | * @kobj: kernel object handle |
cffb2faf | 1228 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
1229 | * @buf: user input |
1230 | * @off: file offset | |
1231 | * @count: number of byte in input | |
1232 | * | |
1233 | * writing anything except 0 enables it | |
1234 | */ | |
3c78bc61 RD |
1235 | static ssize_t pci_write_rom(struct file *filp, struct kobject *kobj, |
1236 | struct bin_attribute *bin_attr, char *buf, | |
1237 | loff_t off, size_t count) | |
1da177e4 LT |
1238 | { |
1239 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj)); | |
1240 | ||
1241 | if ((off == 0) && (*buf == '0') && (count == 2)) | |
1242 | pdev->rom_attr_enabled = 0; | |
1243 | else | |
1244 | pdev->rom_attr_enabled = 1; | |
1245 | ||
1246 | return count; | |
1247 | } | |
1248 | ||
1249 | /** | |
1250 | * pci_read_rom - read a PCI ROM | |
2c3c8bea | 1251 | * @filp: sysfs file |
1da177e4 | 1252 | * @kobj: kernel object handle |
cffb2faf | 1253 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
1254 | * @buf: where to put the data we read from the ROM |
1255 | * @off: file offset | |
1256 | * @count: number of bytes to read | |
1257 | * | |
1258 | * Put @count bytes starting at @off into @buf from the ROM in the PCI | |
1259 | * device corresponding to @kobj. | |
1260 | */ | |
3c78bc61 RD |
1261 | static ssize_t pci_read_rom(struct file *filp, struct kobject *kobj, |
1262 | struct bin_attribute *bin_attr, char *buf, | |
1263 | loff_t off, size_t count) | |
1da177e4 LT |
1264 | { |
1265 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj)); | |
1266 | void __iomem *rom; | |
1267 | size_t size; | |
1268 | ||
1269 | if (!pdev->rom_attr_enabled) | |
1270 | return -EINVAL; | |
f7625980 | 1271 | |
1da177e4 | 1272 | rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */ |
97c44836 TN |
1273 | if (!rom || !size) |
1274 | return -EIO; | |
f7625980 | 1275 | |
1da177e4 LT |
1276 | if (off >= size) |
1277 | count = 0; | |
1278 | else { | |
1279 | if (off + count > size) | |
1280 | count = size - off; | |
f7625980 | 1281 | |
1da177e4 LT |
1282 | memcpy_fromio(buf, rom + off, count); |
1283 | } | |
1284 | pci_unmap_rom(pdev, rom); | |
f7625980 | 1285 | |
1da177e4 LT |
1286 | return count; |
1287 | } | |
1288 | ||
1289 | static struct bin_attribute pci_config_attr = { | |
1290 | .attr = { | |
1291 | .name = "config", | |
1292 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 1293 | }, |
557848c3 | 1294 | .size = PCI_CFG_SPACE_SIZE, |
1da177e4 LT |
1295 | .read = pci_read_config, |
1296 | .write = pci_write_config, | |
1297 | }; | |
1298 | ||
1299 | static struct bin_attribute pcie_config_attr = { | |
1300 | .attr = { | |
1301 | .name = "config", | |
1302 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 1303 | }, |
557848c3 | 1304 | .size = PCI_CFG_SPACE_EXP_SIZE, |
1da177e4 LT |
1305 | .read = pci_read_config, |
1306 | .write = pci_write_config, | |
1307 | }; | |
1308 | ||
3c78bc61 RD |
1309 | static ssize_t reset_store(struct device *dev, struct device_attribute *attr, |
1310 | const char *buf, size_t count) | |
711d5779 MT |
1311 | { |
1312 | struct pci_dev *pdev = to_pci_dev(dev); | |
1313 | unsigned long val; | |
9a994e8e | 1314 | ssize_t result = kstrtoul(buf, 0, &val); |
711d5779 MT |
1315 | |
1316 | if (result < 0) | |
1317 | return result; | |
1318 | ||
1319 | if (val != 1) | |
1320 | return -EINVAL; | |
447c5dd7 MS |
1321 | |
1322 | result = pci_reset_function(pdev); | |
1323 | if (result < 0) | |
1324 | return result; | |
1325 | ||
1326 | return count; | |
711d5779 MT |
1327 | } |
1328 | ||
1329 | static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store); | |
1330 | ||
280c73d3 ZY |
1331 | static int pci_create_capabilities_sysfs(struct pci_dev *dev) |
1332 | { | |
1333 | int retval; | |
1334 | struct bin_attribute *attr; | |
1335 | ||
1336 | /* If the device has VPD, try to expose it in sysfs. */ | |
1337 | if (dev->vpd) { | |
1338 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); | |
1339 | if (!attr) | |
1340 | return -ENOMEM; | |
1341 | ||
a07e4156 | 1342 | sysfs_bin_attr_init(attr); |
280c73d3 ZY |
1343 | attr->size = dev->vpd->len; |
1344 | attr->attr.name = "vpd"; | |
1345 | attr->attr.mode = S_IRUSR | S_IWUSR; | |
287d19ce SH |
1346 | attr->read = read_vpd_attr; |
1347 | attr->write = write_vpd_attr; | |
280c73d3 ZY |
1348 | retval = sysfs_create_bin_file(&dev->dev.kobj, attr); |
1349 | if (retval) { | |
0f12a4e2 | 1350 | kfree(attr); |
280c73d3 ZY |
1351 | return retval; |
1352 | } | |
1353 | dev->vpd->attr = attr; | |
1354 | } | |
1355 | ||
1356 | /* Active State Power Management */ | |
1357 | pcie_aspm_create_sysfs_dev_files(dev); | |
1358 | ||
711d5779 MT |
1359 | if (!pci_probe_reset_function(dev)) { |
1360 | retval = device_create_file(&dev->dev, &reset_attr); | |
1361 | if (retval) | |
1362 | goto error; | |
1363 | dev->reset_fn = 1; | |
1364 | } | |
280c73d3 | 1365 | return 0; |
711d5779 MT |
1366 | |
1367 | error: | |
1368 | pcie_aspm_remove_sysfs_dev_files(dev); | |
1369 | if (dev->vpd && dev->vpd->attr) { | |
1370 | sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr); | |
1371 | kfree(dev->vpd->attr); | |
1372 | } | |
1373 | ||
1374 | return retval; | |
280c73d3 ZY |
1375 | } |
1376 | ||
3c78bc61 | 1377 | int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev) |
1da177e4 | 1378 | { |
b19441af | 1379 | int retval; |
280c73d3 ZY |
1380 | int rom_size = 0; |
1381 | struct bin_attribute *attr; | |
b19441af | 1382 | |
1da177e4 LT |
1383 | if (!sysfs_initialized) |
1384 | return -EACCES; | |
1385 | ||
c7308f63 | 1386 | if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) |
b19441af | 1387 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
c7308f63 JM |
1388 | else |
1389 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr); | |
b19441af GKH |
1390 | if (retval) |
1391 | goto err; | |
1da177e4 | 1392 | |
b19441af GKH |
1393 | retval = pci_create_resource_files(pdev); |
1394 | if (retval) | |
280c73d3 ZY |
1395 | goto err_config_file; |
1396 | ||
1397 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) | |
1398 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); | |
1399 | else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW) | |
1400 | rom_size = 0x20000; | |
1da177e4 LT |
1401 | |
1402 | /* If the device has a ROM, try to expose it in sysfs. */ | |
280c73d3 | 1403 | if (rom_size) { |
94e61088 | 1404 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); |
280c73d3 | 1405 | if (!attr) { |
b19441af | 1406 | retval = -ENOMEM; |
9890b12a | 1407 | goto err_resource_files; |
1da177e4 | 1408 | } |
a07e4156 | 1409 | sysfs_bin_attr_init(attr); |
280c73d3 ZY |
1410 | attr->size = rom_size; |
1411 | attr->attr.name = "rom"; | |
ff29530e | 1412 | attr->attr.mode = S_IRUSR | S_IWUSR; |
280c73d3 ZY |
1413 | attr->read = pci_read_rom; |
1414 | attr->write = pci_write_rom; | |
1415 | retval = sysfs_create_bin_file(&pdev->dev.kobj, attr); | |
1416 | if (retval) { | |
1417 | kfree(attr); | |
1418 | goto err_resource_files; | |
1419 | } | |
1420 | pdev->rom_attr = attr; | |
1da177e4 | 1421 | } |
280c73d3 | 1422 | |
280c73d3 ZY |
1423 | /* add sysfs entries for various capabilities */ |
1424 | retval = pci_create_capabilities_sysfs(pdev); | |
1425 | if (retval) | |
625e1d59 | 1426 | goto err_rom_file; |
7d715a6c | 1427 | |
911e1c9b N |
1428 | pci_create_firmware_label_files(pdev); |
1429 | ||
1da177e4 | 1430 | return 0; |
b19441af | 1431 | |
a2cd52ca | 1432 | err_rom_file: |
280c73d3 | 1433 | if (rom_size) { |
94e61088 | 1434 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); |
280c73d3 ZY |
1435 | kfree(pdev->rom_attr); |
1436 | pdev->rom_attr = NULL; | |
1437 | } | |
9890b12a ME |
1438 | err_resource_files: |
1439 | pci_remove_resource_files(pdev); | |
94e61088 | 1440 | err_config_file: |
c7308f63 | 1441 | if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) |
b19441af | 1442 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
c7308f63 JM |
1443 | else |
1444 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); | |
b19441af GKH |
1445 | err: |
1446 | return retval; | |
1da177e4 LT |
1447 | } |
1448 | ||
280c73d3 ZY |
1449 | static void pci_remove_capabilities_sysfs(struct pci_dev *dev) |
1450 | { | |
1451 | if (dev->vpd && dev->vpd->attr) { | |
1452 | sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr); | |
1453 | kfree(dev->vpd->attr); | |
1454 | } | |
1455 | ||
1456 | pcie_aspm_remove_sysfs_dev_files(dev); | |
711d5779 MT |
1457 | if (dev->reset_fn) { |
1458 | device_remove_file(&dev->dev, &reset_attr); | |
1459 | dev->reset_fn = 0; | |
1460 | } | |
280c73d3 ZY |
1461 | } |
1462 | ||
1da177e4 LT |
1463 | /** |
1464 | * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files | |
1465 | * @pdev: device whose entries we should free | |
1466 | * | |
1467 | * Cleanup when @pdev is removed from sysfs. | |
1468 | */ | |
1469 | void pci_remove_sysfs_dev_files(struct pci_dev *pdev) | |
1470 | { | |
280c73d3 ZY |
1471 | int rom_size = 0; |
1472 | ||
d67afe5e DM |
1473 | if (!sysfs_initialized) |
1474 | return; | |
1475 | ||
280c73d3 | 1476 | pci_remove_capabilities_sysfs(pdev); |
7d715a6c | 1477 | |
c7308f63 | 1478 | if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) |
1da177e4 | 1479 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
c7308f63 JM |
1480 | else |
1481 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); | |
1da177e4 LT |
1482 | |
1483 | pci_remove_resource_files(pdev); | |
1484 | ||
280c73d3 ZY |
1485 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) |
1486 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); | |
1487 | else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW) | |
1488 | rom_size = 0x20000; | |
1489 | ||
1490 | if (rom_size && pdev->rom_attr) { | |
1491 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); | |
1492 | kfree(pdev->rom_attr); | |
1da177e4 | 1493 | } |
911e1c9b N |
1494 | |
1495 | pci_remove_firmware_label_files(pdev); | |
1496 | ||
1da177e4 LT |
1497 | } |
1498 | ||
1499 | static int __init pci_sysfs_init(void) | |
1500 | { | |
1501 | struct pci_dev *pdev = NULL; | |
b19441af GKH |
1502 | int retval; |
1503 | ||
1da177e4 | 1504 | sysfs_initialized = 1; |
b19441af GKH |
1505 | for_each_pci_dev(pdev) { |
1506 | retval = pci_create_sysfs_dev_files(pdev); | |
151fc5df JL |
1507 | if (retval) { |
1508 | pci_dev_put(pdev); | |
b19441af | 1509 | return retval; |
151fc5df | 1510 | } |
b19441af | 1511 | } |
1da177e4 LT |
1512 | |
1513 | return 0; | |
1514 | } | |
40ee9e9f | 1515 | late_initcall(pci_sysfs_init); |
4e15c46b YL |
1516 | |
1517 | static struct attribute *pci_dev_dev_attrs[] = { | |
625e1d59 | 1518 | &vga_attr.attr, |
4e15c46b YL |
1519 | NULL, |
1520 | }; | |
1521 | ||
1522 | static umode_t pci_dev_attrs_are_visible(struct kobject *kobj, | |
3c78bc61 | 1523 | struct attribute *a, int n) |
4e15c46b | 1524 | { |
625e1d59 YL |
1525 | struct device *dev = container_of(kobj, struct device, kobj); |
1526 | struct pci_dev *pdev = to_pci_dev(dev); | |
1527 | ||
1528 | if (a == &vga_attr.attr) | |
1529 | if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
1530 | return 0; | |
1531 | ||
4e15c46b YL |
1532 | return a->mode; |
1533 | } | |
1534 | ||
dfab88be JL |
1535 | static struct attribute *pci_dev_hp_attrs[] = { |
1536 | &dev_remove_attr.attr, | |
1537 | &dev_rescan_attr.attr, | |
1538 | NULL, | |
1539 | }; | |
1540 | ||
1541 | static umode_t pci_dev_hp_attrs_are_visible(struct kobject *kobj, | |
3c78bc61 | 1542 | struct attribute *a, int n) |
dfab88be JL |
1543 | { |
1544 | struct device *dev = container_of(kobj, struct device, kobj); | |
1545 | struct pci_dev *pdev = to_pci_dev(dev); | |
1546 | ||
1547 | if (pdev->is_virtfn) | |
1548 | return 0; | |
1549 | ||
1550 | return a->mode; | |
1551 | } | |
1552 | ||
1553 | static struct attribute_group pci_dev_hp_attr_group = { | |
1554 | .attrs = pci_dev_hp_attrs, | |
1555 | .is_visible = pci_dev_hp_attrs_are_visible, | |
1556 | }; | |
1557 | ||
1789382a DD |
1558 | #ifdef CONFIG_PCI_IOV |
1559 | static struct attribute *sriov_dev_attrs[] = { | |
1560 | &sriov_totalvfs_attr.attr, | |
1561 | &sriov_numvfs_attr.attr, | |
1562 | NULL, | |
1563 | }; | |
1564 | ||
1565 | static umode_t sriov_attrs_are_visible(struct kobject *kobj, | |
3c78bc61 | 1566 | struct attribute *a, int n) |
1789382a DD |
1567 | { |
1568 | struct device *dev = container_of(kobj, struct device, kobj); | |
1569 | ||
1570 | if (!dev_is_pf(dev)) | |
1571 | return 0; | |
1572 | ||
1573 | return a->mode; | |
1574 | } | |
1575 | ||
1576 | static struct attribute_group sriov_dev_attr_group = { | |
1577 | .attrs = sriov_dev_attrs, | |
1578 | .is_visible = sriov_attrs_are_visible, | |
1579 | }; | |
1580 | #endif /* CONFIG_PCI_IOV */ | |
1581 | ||
4e15c46b YL |
1582 | static struct attribute_group pci_dev_attr_group = { |
1583 | .attrs = pci_dev_dev_attrs, | |
1584 | .is_visible = pci_dev_attrs_are_visible, | |
1585 | }; | |
1586 | ||
1587 | static const struct attribute_group *pci_dev_attr_groups[] = { | |
1588 | &pci_dev_attr_group, | |
dfab88be | 1589 | &pci_dev_hp_attr_group, |
1789382a DD |
1590 | #ifdef CONFIG_PCI_IOV |
1591 | &sriov_dev_attr_group, | |
1592 | #endif | |
4e15c46b YL |
1593 | NULL, |
1594 | }; | |
1595 | ||
1596 | struct device_type pci_dev_type = { | |
1597 | .groups = pci_dev_attr_groups, | |
1598 | }; |