Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * (C) Copyright 2002-2004 Greg Kroah-Hartman <greg@kroah.com> |
4 | * (C) Copyright 2002-2004 IBM Corp. | |
5 | * (C) Copyright 2003 Matthew Wilcox | |
6 | * (C) Copyright 2003 Hewlett-Packard | |
7 | * (C) Copyright 2004 Jon Smirl <jonsmirl@yahoo.com> | |
8 | * (C) Copyright 2004 Silicon Graphics, Inc. Jesse Barnes <jbarnes@sgi.com> | |
9 | * | |
10 | * File attributes for PCI devices | |
11 | * | |
f7625980 | 12 | * Modeled after usb's driverfs.c |
1da177e4 LT |
13 | */ |
14 | ||
15 | ||
1da177e4 | 16 | #include <linux/kernel.h> |
b5ff7df3 | 17 | #include <linux/sched.h> |
1da177e4 LT |
18 | #include <linux/pci.h> |
19 | #include <linux/stat.h> | |
363c75db | 20 | #include <linux/export.h> |
1da177e4 LT |
21 | #include <linux/topology.h> |
22 | #include <linux/mm.h> | |
de139a33 | 23 | #include <linux/fs.h> |
aa0ac365 | 24 | #include <linux/capability.h> |
a628e7b8 | 25 | #include <linux/security.h> |
7d715a6c | 26 | #include <linux/pci-aspm.h> |
5a0e3ad6 | 27 | #include <linux/slab.h> |
1a39b310 | 28 | #include <linux/vgaarb.h> |
448bd857 | 29 | #include <linux/pm_runtime.h> |
dfc73e7a | 30 | #include <linux/of.h> |
1da177e4 LT |
31 | #include "pci.h" |
32 | ||
33 | static int sysfs_initialized; /* = 0 */ | |
34 | ||
35 | /* show configuration fields */ | |
36 | #define pci_config_attr(field, format_string) \ | |
37 | static ssize_t \ | |
e404e274 | 38 | field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
39 | { \ |
40 | struct pci_dev *pdev; \ | |
41 | \ | |
3c78bc61 RD |
42 | pdev = to_pci_dev(dev); \ |
43 | return sprintf(buf, format_string, pdev->field); \ | |
5136b2da GKH |
44 | } \ |
45 | static DEVICE_ATTR_RO(field) | |
1da177e4 LT |
46 | |
47 | pci_config_attr(vendor, "0x%04x\n"); | |
48 | pci_config_attr(device, "0x%04x\n"); | |
49 | pci_config_attr(subsystem_vendor, "0x%04x\n"); | |
50 | pci_config_attr(subsystem_device, "0x%04x\n"); | |
702ed3be | 51 | pci_config_attr(revision, "0x%02x\n"); |
1da177e4 LT |
52 | pci_config_attr(class, "0x%06x\n"); |
53 | pci_config_attr(irq, "%u\n"); | |
54 | ||
bdee9d98 DT |
55 | static ssize_t broken_parity_status_show(struct device *dev, |
56 | struct device_attribute *attr, | |
57 | char *buf) | |
58 | { | |
59 | struct pci_dev *pdev = to_pci_dev(dev); | |
3c78bc61 | 60 | return sprintf(buf, "%u\n", pdev->broken_parity_status); |
bdee9d98 DT |
61 | } |
62 | ||
63 | static ssize_t broken_parity_status_store(struct device *dev, | |
64 | struct device_attribute *attr, | |
65 | const char *buf, size_t count) | |
66 | { | |
67 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 | 68 | unsigned long val; |
bdee9d98 | 69 | |
9a994e8e | 70 | if (kstrtoul(buf, 0, &val) < 0) |
92425a40 TP |
71 | return -EINVAL; |
72 | ||
73 | pdev->broken_parity_status = !!val; | |
74 | ||
75 | return count; | |
bdee9d98 | 76 | } |
5136b2da | 77 | static DEVICE_ATTR_RW(broken_parity_status); |
bdee9d98 | 78 | |
5aaba363 | 79 | static ssize_t pci_dev_show_local_cpu(struct device *dev, bool list, |
3c78bc61 | 80 | struct device_attribute *attr, char *buf) |
c489f5fb | 81 | { |
3be83050 | 82 | const struct cpumask *mask; |
4327edf6 | 83 | |
e0cd5160 | 84 | #ifdef CONFIG_NUMA |
6be954d1 DJ |
85 | mask = (dev_to_node(dev) == -1) ? cpu_online_mask : |
86 | cpumask_of_node(dev_to_node(dev)); | |
e0cd5160 | 87 | #else |
3be83050 | 88 | mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); |
e0cd5160 | 89 | #endif |
5aaba363 | 90 | return cpumap_print_to_pagebuf(list, buf, mask); |
39106dcf MT |
91 | } |
92 | ||
c489f5fb | 93 | static ssize_t local_cpus_show(struct device *dev, |
3c78bc61 | 94 | struct device_attribute *attr, char *buf) |
c489f5fb | 95 | { |
5aaba363 | 96 | return pci_dev_show_local_cpu(dev, false, attr, buf); |
c489f5fb | 97 | } |
5136b2da | 98 | static DEVICE_ATTR_RO(local_cpus); |
39106dcf MT |
99 | |
100 | static ssize_t local_cpulist_show(struct device *dev, | |
3c78bc61 | 101 | struct device_attribute *attr, char *buf) |
39106dcf | 102 | { |
5aaba363 | 103 | return pci_dev_show_local_cpu(dev, true, attr, buf); |
1da177e4 | 104 | } |
5136b2da | 105 | static DEVICE_ATTR_RO(local_cpulist); |
1da177e4 | 106 | |
dc2c2c9d YL |
107 | /* |
108 | * PCI Bus Class Devices | |
109 | */ | |
56039e65 GKH |
110 | static ssize_t cpuaffinity_show(struct device *dev, |
111 | struct device_attribute *attr, char *buf) | |
dc2c2c9d | 112 | { |
5aaba363 SH |
113 | const struct cpumask *cpumask = cpumask_of_pcibus(to_pci_bus(dev)); |
114 | ||
115 | return cpumap_print_to_pagebuf(false, buf, cpumask); | |
dc2c2c9d | 116 | } |
56039e65 | 117 | static DEVICE_ATTR_RO(cpuaffinity); |
dc2c2c9d | 118 | |
56039e65 GKH |
119 | static ssize_t cpulistaffinity_show(struct device *dev, |
120 | struct device_attribute *attr, char *buf) | |
dc2c2c9d | 121 | { |
5aaba363 SH |
122 | const struct cpumask *cpumask = cpumask_of_pcibus(to_pci_bus(dev)); |
123 | ||
124 | return cpumap_print_to_pagebuf(true, buf, cpumask); | |
dc2c2c9d | 125 | } |
56039e65 | 126 | static DEVICE_ATTR_RO(cpulistaffinity); |
dc2c2c9d | 127 | |
1da177e4 | 128 | /* show resources */ |
3c78bc61 RD |
129 | static ssize_t resource_show(struct device *dev, struct device_attribute *attr, |
130 | char *buf) | |
1da177e4 | 131 | { |
3c78bc61 RD |
132 | struct pci_dev *pci_dev = to_pci_dev(dev); |
133 | char *str = buf; | |
1da177e4 | 134 | int i; |
fde09c6d | 135 | int max; |
e31dd6e4 | 136 | resource_size_t start, end; |
1da177e4 LT |
137 | |
138 | if (pci_dev->subordinate) | |
139 | max = DEVICE_COUNT_RESOURCE; | |
fde09c6d YZ |
140 | else |
141 | max = PCI_BRIDGE_RESOURCES; | |
1da177e4 LT |
142 | |
143 | for (i = 0; i < max; i++) { | |
2311b1f2 ME |
144 | struct resource *res = &pci_dev->resource[i]; |
145 | pci_resource_to_user(pci_dev, i, res, &start, &end); | |
3c78bc61 | 146 | str += sprintf(str, "0x%016llx 0x%016llx 0x%016llx\n", |
2311b1f2 ME |
147 | (unsigned long long)start, |
148 | (unsigned long long)end, | |
149 | (unsigned long long)res->flags); | |
1da177e4 LT |
150 | } |
151 | return (str - buf); | |
152 | } | |
5136b2da | 153 | static DEVICE_ATTR_RO(resource); |
1da177e4 | 154 | |
56c1af46 WVK |
155 | static ssize_t max_link_speed_show(struct device *dev, |
156 | struct device_attribute *attr, char *buf) | |
157 | { | |
6cf57be0 | 158 | struct pci_dev *pdev = to_pci_dev(dev); |
56c1af46 | 159 | |
6cf57be0 | 160 | return sprintf(buf, "%s\n", PCIE_SPEED2STR(pcie_get_speed_cap(pdev))); |
56c1af46 WVK |
161 | } |
162 | static DEVICE_ATTR_RO(max_link_speed); | |
163 | ||
164 | static ssize_t max_link_width_show(struct device *dev, | |
165 | struct device_attribute *attr, char *buf) | |
166 | { | |
c70b65fb | 167 | struct pci_dev *pdev = to_pci_dev(dev); |
56c1af46 | 168 | |
c70b65fb | 169 | return sprintf(buf, "%u\n", pcie_get_width_cap(pdev)); |
56c1af46 WVK |
170 | } |
171 | static DEVICE_ATTR_RO(max_link_width); | |
172 | ||
173 | static ssize_t current_link_speed_show(struct device *dev, | |
174 | struct device_attribute *attr, char *buf) | |
175 | { | |
176 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
177 | u16 linkstat; | |
178 | int err; | |
179 | const char *speed; | |
180 | ||
181 | err = pcie_capability_read_word(pci_dev, PCI_EXP_LNKSTA, &linkstat); | |
182 | if (err) | |
183 | return -EINVAL; | |
184 | ||
185 | switch (linkstat & PCI_EXP_LNKSTA_CLS) { | |
1acfb9b7 JF |
186 | case PCI_EXP_LNKSTA_CLS_16_0GB: |
187 | speed = "16 GT/s"; | |
188 | break; | |
56c1af46 WVK |
189 | case PCI_EXP_LNKSTA_CLS_8_0GB: |
190 | speed = "8 GT/s"; | |
191 | break; | |
192 | case PCI_EXP_LNKSTA_CLS_5_0GB: | |
193 | speed = "5 GT/s"; | |
194 | break; | |
195 | case PCI_EXP_LNKSTA_CLS_2_5GB: | |
196 | speed = "2.5 GT/s"; | |
197 | break; | |
198 | default: | |
199 | speed = "Unknown speed"; | |
200 | } | |
201 | ||
202 | return sprintf(buf, "%s\n", speed); | |
203 | } | |
204 | static DEVICE_ATTR_RO(current_link_speed); | |
205 | ||
206 | static ssize_t current_link_width_show(struct device *dev, | |
207 | struct device_attribute *attr, char *buf) | |
208 | { | |
209 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
210 | u16 linkstat; | |
211 | int err; | |
212 | ||
213 | err = pcie_capability_read_word(pci_dev, PCI_EXP_LNKSTA, &linkstat); | |
214 | if (err) | |
215 | return -EINVAL; | |
216 | ||
217 | return sprintf(buf, "%u\n", | |
218 | (linkstat & PCI_EXP_LNKSTA_NLW) >> PCI_EXP_LNKSTA_NLW_SHIFT); | |
219 | } | |
220 | static DEVICE_ATTR_RO(current_link_width); | |
221 | ||
222 | static ssize_t secondary_bus_number_show(struct device *dev, | |
223 | struct device_attribute *attr, | |
224 | char *buf) | |
225 | { | |
226 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
227 | u8 sec_bus; | |
228 | int err; | |
229 | ||
230 | err = pci_read_config_byte(pci_dev, PCI_SECONDARY_BUS, &sec_bus); | |
231 | if (err) | |
232 | return -EINVAL; | |
233 | ||
234 | return sprintf(buf, "%u\n", sec_bus); | |
235 | } | |
236 | static DEVICE_ATTR_RO(secondary_bus_number); | |
237 | ||
238 | static ssize_t subordinate_bus_number_show(struct device *dev, | |
239 | struct device_attribute *attr, | |
240 | char *buf) | |
241 | { | |
242 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
243 | u8 sub_bus; | |
244 | int err; | |
245 | ||
246 | err = pci_read_config_byte(pci_dev, PCI_SUBORDINATE_BUS, &sub_bus); | |
247 | if (err) | |
248 | return -EINVAL; | |
249 | ||
250 | return sprintf(buf, "%u\n", sub_bus); | |
251 | } | |
252 | static DEVICE_ATTR_RO(subordinate_bus_number); | |
253 | ||
0077a845 SH |
254 | static ssize_t ari_enabled_show(struct device *dev, |
255 | struct device_attribute *attr, | |
256 | char *buf) | |
257 | { | |
258 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
259 | ||
260 | return sprintf(buf, "%u\n", pci_ari_enabled(pci_dev->bus)); | |
261 | } | |
262 | static DEVICE_ATTR_RO(ari_enabled); | |
263 | ||
3c78bc61 RD |
264 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, |
265 | char *buf) | |
9888549e GK |
266 | { |
267 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
268 | ||
89ec3dcf | 269 | return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02X\n", |
9888549e GK |
270 | pci_dev->vendor, pci_dev->device, |
271 | pci_dev->subsystem_vendor, pci_dev->subsystem_device, | |
272 | (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8), | |
273 | (u8)(pci_dev->class)); | |
274 | } | |
5136b2da | 275 | static DEVICE_ATTR_RO(modalias); |
bae94d02 | 276 | |
d8e7d53a | 277 | static ssize_t enable_store(struct device *dev, struct device_attribute *attr, |
3c78bc61 | 278 | const char *buf, size_t count) |
9f125d30 AV |
279 | { |
280 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 | 281 | unsigned long val; |
9a994e8e | 282 | ssize_t result = kstrtoul(buf, 0, &val); |
92425a40 TP |
283 | |
284 | if (result < 0) | |
285 | return result; | |
9f125d30 AV |
286 | |
287 | /* this can crash the machine when done on the "wrong" device */ | |
288 | if (!capable(CAP_SYS_ADMIN)) | |
92425a40 | 289 | return -EPERM; |
9f125d30 | 290 | |
92425a40 | 291 | if (!val) { |
296ccb08 | 292 | if (pci_is_enabled(pdev)) |
bae94d02 IPG |
293 | pci_disable_device(pdev); |
294 | else | |
295 | result = -EIO; | |
92425a40 | 296 | } else |
bae94d02 | 297 | result = pci_enable_device(pdev); |
9f125d30 | 298 | |
bae94d02 IPG |
299 | return result < 0 ? result : count; |
300 | } | |
301 | ||
d8e7d53a | 302 | static ssize_t enable_show(struct device *dev, struct device_attribute *attr, |
3c78bc61 | 303 | char *buf) |
bae94d02 IPG |
304 | { |
305 | struct pci_dev *pdev; | |
9f125d30 | 306 | |
3c78bc61 RD |
307 | pdev = to_pci_dev(dev); |
308 | return sprintf(buf, "%u\n", atomic_read(&pdev->enable_cnt)); | |
9f125d30 | 309 | } |
d8e7d53a | 310 | static DEVICE_ATTR_RW(enable); |
9f125d30 | 311 | |
81bb0e19 | 312 | #ifdef CONFIG_NUMA |
63692df1 PB |
313 | static ssize_t numa_node_store(struct device *dev, |
314 | struct device_attribute *attr, const char *buf, | |
315 | size_t count) | |
316 | { | |
317 | struct pci_dev *pdev = to_pci_dev(dev); | |
318 | int node, ret; | |
319 | ||
320 | if (!capable(CAP_SYS_ADMIN)) | |
321 | return -EPERM; | |
322 | ||
323 | ret = kstrtoint(buf, 0, &node); | |
324 | if (ret) | |
325 | return ret; | |
326 | ||
3dcc8d39 MK |
327 | if ((node < 0 && node != NUMA_NO_NODE) || node >= MAX_NUMNODES) |
328 | return -EINVAL; | |
329 | ||
330 | if (node != NUMA_NO_NODE && !node_online(node)) | |
63692df1 PB |
331 | return -EINVAL; |
332 | ||
333 | add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK); | |
7506dc79 | 334 | pci_alert(pdev, FW_BUG "Overriding NUMA node to %d. Contact your vendor for updates.", |
63692df1 PB |
335 | node); |
336 | ||
337 | dev->numa_node = node; | |
338 | return count; | |
339 | } | |
340 | ||
3c78bc61 RD |
341 | static ssize_t numa_node_show(struct device *dev, struct device_attribute *attr, |
342 | char *buf) | |
81bb0e19 | 343 | { |
3c78bc61 | 344 | return sprintf(buf, "%d\n", dev->numa_node); |
81bb0e19 | 345 | } |
63692df1 | 346 | static DEVICE_ATTR_RW(numa_node); |
81bb0e19 BG |
347 | #endif |
348 | ||
3c78bc61 RD |
349 | static ssize_t dma_mask_bits_show(struct device *dev, |
350 | struct device_attribute *attr, char *buf) | |
bb965401 YL |
351 | { |
352 | struct pci_dev *pdev = to_pci_dev(dev); | |
353 | ||
3c78bc61 | 354 | return sprintf(buf, "%d\n", fls64(pdev->dma_mask)); |
bb965401 | 355 | } |
5136b2da | 356 | static DEVICE_ATTR_RO(dma_mask_bits); |
bb965401 | 357 | |
3c78bc61 RD |
358 | static ssize_t consistent_dma_mask_bits_show(struct device *dev, |
359 | struct device_attribute *attr, | |
360 | char *buf) | |
bb965401 | 361 | { |
3c78bc61 | 362 | return sprintf(buf, "%d\n", fls64(dev->coherent_dma_mask)); |
bb965401 | 363 | } |
5136b2da | 364 | static DEVICE_ATTR_RO(consistent_dma_mask_bits); |
bb965401 | 365 | |
3c78bc61 RD |
366 | static ssize_t msi_bus_show(struct device *dev, struct device_attribute *attr, |
367 | char *buf) | |
fe97064c BG |
368 | { |
369 | struct pci_dev *pdev = to_pci_dev(dev); | |
468ff15a | 370 | struct pci_bus *subordinate = pdev->subordinate; |
fe97064c | 371 | |
468ff15a YW |
372 | return sprintf(buf, "%u\n", subordinate ? |
373 | !(subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) | |
374 | : !pdev->no_msi); | |
fe97064c BG |
375 | } |
376 | ||
3c78bc61 RD |
377 | static ssize_t msi_bus_store(struct device *dev, struct device_attribute *attr, |
378 | const char *buf, size_t count) | |
fe97064c BG |
379 | { |
380 | struct pci_dev *pdev = to_pci_dev(dev); | |
468ff15a | 381 | struct pci_bus *subordinate = pdev->subordinate; |
92425a40 TP |
382 | unsigned long val; |
383 | ||
9a994e8e | 384 | if (kstrtoul(buf, 0, &val) < 0) |
92425a40 | 385 | return -EINVAL; |
fe97064c | 386 | |
fe97064c | 387 | if (!capable(CAP_SYS_ADMIN)) |
92425a40 | 388 | return -EPERM; |
fe97064c | 389 | |
f7625980 | 390 | /* |
468ff15a YW |
391 | * "no_msi" and "bus_flags" only affect what happens when a driver |
392 | * requests MSI or MSI-X. They don't affect any drivers that have | |
393 | * already requested MSI or MSI-X. | |
f7625980 | 394 | */ |
468ff15a YW |
395 | if (!subordinate) { |
396 | pdev->no_msi = !val; | |
7506dc79 | 397 | pci_info(pdev, "MSI/MSI-X %s for future drivers\n", |
468ff15a | 398 | val ? "allowed" : "disallowed"); |
fe97064c | 399 | return count; |
fe97064c BG |
400 | } |
401 | ||
468ff15a YW |
402 | if (val) |
403 | subordinate->bus_flags &= ~PCI_BUS_FLAGS_NO_MSI; | |
404 | else | |
405 | subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI; | |
406 | ||
407 | dev_info(&subordinate->dev, "MSI/MSI-X %s for future drivers of devices on this bus\n", | |
408 | val ? "allowed" : "disallowed"); | |
fe97064c BG |
409 | return count; |
410 | } | |
5136b2da | 411 | static DEVICE_ATTR_RW(msi_bus); |
9888549e | 412 | |
705b1aaa AC |
413 | static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf, |
414 | size_t count) | |
415 | { | |
416 | unsigned long val; | |
417 | struct pci_bus *b = NULL; | |
418 | ||
9a994e8e | 419 | if (kstrtoul(buf, 0, &val) < 0) |
705b1aaa AC |
420 | return -EINVAL; |
421 | ||
422 | if (val) { | |
9d16947b | 423 | pci_lock_rescan_remove(); |
705b1aaa AC |
424 | while ((b = pci_find_next_bus(b)) != NULL) |
425 | pci_rescan_bus(b); | |
9d16947b | 426 | pci_unlock_rescan_remove(); |
705b1aaa AC |
427 | } |
428 | return count; | |
429 | } | |
0f49ba55 | 430 | static BUS_ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store); |
705b1aaa | 431 | |
bf22c90f | 432 | static struct attribute *pci_bus_attrs[] = { |
0f49ba55 GKH |
433 | &bus_attr_rescan.attr, |
434 | NULL, | |
435 | }; | |
436 | ||
437 | static const struct attribute_group pci_bus_group = { | |
438 | .attrs = pci_bus_attrs, | |
439 | }; | |
440 | ||
441 | const struct attribute_group *pci_bus_groups[] = { | |
442 | &pci_bus_group, | |
443 | NULL, | |
705b1aaa | 444 | }; |
77c27c7b | 445 | |
3c78bc61 RD |
446 | static ssize_t dev_rescan_store(struct device *dev, |
447 | struct device_attribute *attr, const char *buf, | |
448 | size_t count) | |
738a6396 AC |
449 | { |
450 | unsigned long val; | |
451 | struct pci_dev *pdev = to_pci_dev(dev); | |
452 | ||
9a994e8e | 453 | if (kstrtoul(buf, 0, &val) < 0) |
738a6396 AC |
454 | return -EINVAL; |
455 | ||
456 | if (val) { | |
9d16947b | 457 | pci_lock_rescan_remove(); |
738a6396 | 458 | pci_rescan_bus(pdev->bus); |
9d16947b | 459 | pci_unlock_rescan_remove(); |
738a6396 AC |
460 | } |
461 | return count; | |
462 | } | |
bf22c90f SK |
463 | static struct device_attribute dev_rescan_attr = __ATTR(rescan, |
464 | (S_IWUSR|S_IWGRP), | |
465 | NULL, dev_rescan_store); | |
738a6396 | 466 | |
3c78bc61 RD |
467 | static ssize_t remove_store(struct device *dev, struct device_attribute *attr, |
468 | const char *buf, size_t count) | |
77c27c7b | 469 | { |
77c27c7b | 470 | unsigned long val; |
77c27c7b | 471 | |
9a994e8e | 472 | if (kstrtoul(buf, 0, &val) < 0) |
77c27c7b AC |
473 | return -EINVAL; |
474 | ||
bc6caf02 TH |
475 | if (val && device_remove_file_self(dev, attr)) |
476 | pci_stop_and_remove_bus_device_locked(to_pci_dev(dev)); | |
77c27c7b AC |
477 | return count; |
478 | } | |
bf22c90f SK |
479 | static struct device_attribute dev_remove_attr = __ATTR(remove, |
480 | (S_IWUSR|S_IWGRP), | |
481 | NULL, remove_store); | |
b9d320fc | 482 | |
3c78bc61 RD |
483 | static ssize_t dev_bus_rescan_store(struct device *dev, |
484 | struct device_attribute *attr, | |
485 | const char *buf, size_t count) | |
b9d320fc YL |
486 | { |
487 | unsigned long val; | |
488 | struct pci_bus *bus = to_pci_bus(dev); | |
489 | ||
9a994e8e | 490 | if (kstrtoul(buf, 0, &val) < 0) |
b9d320fc YL |
491 | return -EINVAL; |
492 | ||
493 | if (val) { | |
9d16947b | 494 | pci_lock_rescan_remove(); |
2f320521 YL |
495 | if (!pci_is_root_bus(bus) && list_empty(&bus->devices)) |
496 | pci_rescan_bus_bridge_resize(bus->self); | |
497 | else | |
498 | pci_rescan_bus(bus); | |
9d16947b | 499 | pci_unlock_rescan_remove(); |
b9d320fc YL |
500 | } |
501 | return count; | |
502 | } | |
56039e65 | 503 | static DEVICE_ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store); |
b9d320fc | 504 | |
fbb988be | 505 | #if defined(CONFIG_PM) && defined(CONFIG_ACPI) |
448bd857 HY |
506 | static ssize_t d3cold_allowed_store(struct device *dev, |
507 | struct device_attribute *attr, | |
508 | const char *buf, size_t count) | |
509 | { | |
510 | struct pci_dev *pdev = to_pci_dev(dev); | |
511 | unsigned long val; | |
512 | ||
9a994e8e | 513 | if (kstrtoul(buf, 0, &val) < 0) |
448bd857 HY |
514 | return -EINVAL; |
515 | ||
516 | pdev->d3cold_allowed = !!val; | |
9d26d3a8 MW |
517 | if (pdev->d3cold_allowed) |
518 | pci_d3cold_enable(pdev); | |
519 | else | |
520 | pci_d3cold_disable(pdev); | |
521 | ||
448bd857 HY |
522 | pm_runtime_resume(dev); |
523 | ||
524 | return count; | |
525 | } | |
526 | ||
527 | static ssize_t d3cold_allowed_show(struct device *dev, | |
528 | struct device_attribute *attr, char *buf) | |
529 | { | |
530 | struct pci_dev *pdev = to_pci_dev(dev); | |
3c78bc61 | 531 | return sprintf(buf, "%u\n", pdev->d3cold_allowed); |
448bd857 | 532 | } |
5136b2da | 533 | static DEVICE_ATTR_RW(d3cold_allowed); |
448bd857 HY |
534 | #endif |
535 | ||
dfc73e7a SO |
536 | #ifdef CONFIG_OF |
537 | static ssize_t devspec_show(struct device *dev, | |
538 | struct device_attribute *attr, char *buf) | |
539 | { | |
540 | struct pci_dev *pdev = to_pci_dev(dev); | |
541 | struct device_node *np = pci_device_to_OF_node(pdev); | |
542 | ||
b63773a8 | 543 | if (np == NULL) |
dfc73e7a | 544 | return 0; |
b63773a8 | 545 | return sprintf(buf, "%pOF", np); |
dfc73e7a SO |
546 | } |
547 | static DEVICE_ATTR_RO(devspec); | |
548 | #endif | |
549 | ||
1789382a DD |
550 | #ifdef CONFIG_PCI_IOV |
551 | static ssize_t sriov_totalvfs_show(struct device *dev, | |
552 | struct device_attribute *attr, | |
553 | char *buf) | |
554 | { | |
555 | struct pci_dev *pdev = to_pci_dev(dev); | |
556 | ||
bff73156 | 557 | return sprintf(buf, "%u\n", pci_sriov_get_totalvfs(pdev)); |
1789382a DD |
558 | } |
559 | ||
560 | ||
561 | static ssize_t sriov_numvfs_show(struct device *dev, | |
562 | struct device_attribute *attr, | |
563 | char *buf) | |
564 | { | |
565 | struct pci_dev *pdev = to_pci_dev(dev); | |
566 | ||
6b136724 | 567 | return sprintf(buf, "%u\n", pdev->sriov->num_VFs); |
1789382a DD |
568 | } |
569 | ||
570 | /* | |
faa48a50 BH |
571 | * num_vfs > 0; number of VFs to enable |
572 | * num_vfs = 0; disable all VFs | |
1789382a DD |
573 | * |
574 | * Note: SRIOV spec doesn't allow partial VF | |
faa48a50 | 575 | * disable, so it's all or none. |
1789382a DD |
576 | */ |
577 | static ssize_t sriov_numvfs_store(struct device *dev, | |
578 | struct device_attribute *attr, | |
579 | const char *buf, size_t count) | |
580 | { | |
581 | struct pci_dev *pdev = to_pci_dev(dev); | |
faa48a50 BH |
582 | int ret; |
583 | u16 num_vfs; | |
1789382a | 584 | |
faa48a50 BH |
585 | ret = kstrtou16(buf, 0, &num_vfs); |
586 | if (ret < 0) | |
587 | return ret; | |
588 | ||
589 | if (num_vfs > pci_sriov_get_totalvfs(pdev)) | |
590 | return -ERANGE; | |
591 | ||
17530e71 | 592 | device_lock(&pdev->dev); |
5b0948df | 593 | |
faa48a50 | 594 | if (num_vfs == pdev->sriov->num_VFs) |
5b0948df | 595 | goto exit; |
1789382a DD |
596 | |
597 | /* is PF driver loaded w/callback */ | |
598 | if (!pdev->driver || !pdev->driver->sriov_configure) { | |
7506dc79 | 599 | pci_info(pdev, "Driver doesn't support SRIOV configuration via sysfs\n"); |
5b0948df ET |
600 | ret = -ENOENT; |
601 | goto exit; | |
1789382a DD |
602 | } |
603 | ||
faa48a50 BH |
604 | if (num_vfs == 0) { |
605 | /* disable VFs */ | |
606 | ret = pdev->driver->sriov_configure(pdev, 0); | |
5b0948df | 607 | goto exit; |
1789382a DD |
608 | } |
609 | ||
faa48a50 BH |
610 | /* enable VFs */ |
611 | if (pdev->sriov->num_VFs) { | |
7506dc79 | 612 | pci_warn(pdev, "%d VFs already enabled. Disable before enabling %d VFs\n", |
faa48a50 | 613 | pdev->sriov->num_VFs, num_vfs); |
5b0948df ET |
614 | ret = -EBUSY; |
615 | goto exit; | |
1789382a DD |
616 | } |
617 | ||
faa48a50 BH |
618 | ret = pdev->driver->sriov_configure(pdev, num_vfs); |
619 | if (ret < 0) | |
5b0948df | 620 | goto exit; |
1789382a | 621 | |
faa48a50 | 622 | if (ret != num_vfs) |
7506dc79 | 623 | pci_warn(pdev, "%d VFs requested; only %d enabled\n", |
faa48a50 BH |
624 | num_vfs, ret); |
625 | ||
5b0948df | 626 | exit: |
17530e71 | 627 | device_unlock(&pdev->dev); |
5b0948df ET |
628 | |
629 | if (ret < 0) | |
630 | return ret; | |
631 | ||
faa48a50 | 632 | return count; |
1789382a DD |
633 | } |
634 | ||
7dfca152 FS |
635 | static ssize_t sriov_offset_show(struct device *dev, |
636 | struct device_attribute *attr, | |
637 | char *buf) | |
638 | { | |
639 | struct pci_dev *pdev = to_pci_dev(dev); | |
640 | ||
641 | return sprintf(buf, "%u\n", pdev->sriov->offset); | |
642 | } | |
643 | ||
644 | static ssize_t sriov_stride_show(struct device *dev, | |
645 | struct device_attribute *attr, | |
646 | char *buf) | |
647 | { | |
648 | struct pci_dev *pdev = to_pci_dev(dev); | |
649 | ||
650 | return sprintf(buf, "%u\n", pdev->sriov->stride); | |
651 | } | |
652 | ||
653 | static ssize_t sriov_vf_device_show(struct device *dev, | |
654 | struct device_attribute *attr, | |
655 | char *buf) | |
656 | { | |
657 | struct pci_dev *pdev = to_pci_dev(dev); | |
658 | ||
659 | return sprintf(buf, "%x\n", pdev->sriov->vf_device); | |
660 | } | |
661 | ||
0e7df224 BW |
662 | static ssize_t sriov_drivers_autoprobe_show(struct device *dev, |
663 | struct device_attribute *attr, | |
664 | char *buf) | |
665 | { | |
666 | struct pci_dev *pdev = to_pci_dev(dev); | |
667 | ||
668 | return sprintf(buf, "%u\n", pdev->sriov->drivers_autoprobe); | |
669 | } | |
670 | ||
671 | static ssize_t sriov_drivers_autoprobe_store(struct device *dev, | |
672 | struct device_attribute *attr, | |
673 | const char *buf, size_t count) | |
674 | { | |
675 | struct pci_dev *pdev = to_pci_dev(dev); | |
676 | bool drivers_autoprobe; | |
677 | ||
678 | if (kstrtobool(buf, &drivers_autoprobe) < 0) | |
679 | return -EINVAL; | |
680 | ||
681 | pdev->sriov->drivers_autoprobe = drivers_autoprobe; | |
682 | ||
683 | return count; | |
684 | } | |
685 | ||
1789382a DD |
686 | static struct device_attribute sriov_totalvfs_attr = __ATTR_RO(sriov_totalvfs); |
687 | static struct device_attribute sriov_numvfs_attr = | |
688 | __ATTR(sriov_numvfs, (S_IRUGO|S_IWUSR|S_IWGRP), | |
689 | sriov_numvfs_show, sriov_numvfs_store); | |
7dfca152 FS |
690 | static struct device_attribute sriov_offset_attr = __ATTR_RO(sriov_offset); |
691 | static struct device_attribute sriov_stride_attr = __ATTR_RO(sriov_stride); | |
692 | static struct device_attribute sriov_vf_device_attr = __ATTR_RO(sriov_vf_device); | |
0e7df224 BW |
693 | static struct device_attribute sriov_drivers_autoprobe_attr = |
694 | __ATTR(sriov_drivers_autoprobe, (S_IRUGO|S_IWUSR|S_IWGRP), | |
695 | sriov_drivers_autoprobe_show, sriov_drivers_autoprobe_store); | |
1789382a DD |
696 | #endif /* CONFIG_PCI_IOV */ |
697 | ||
782a985d AW |
698 | static ssize_t driver_override_store(struct device *dev, |
699 | struct device_attribute *attr, | |
700 | const char *buf, size_t count) | |
701 | { | |
702 | struct pci_dev *pdev = to_pci_dev(dev); | |
9561475d | 703 | char *driver_override, *old, *cp; |
782a985d | 704 | |
4efe874a SL |
705 | /* We need to keep extra room for a newline */ |
706 | if (count >= (PAGE_SIZE - 1)) | |
782a985d AW |
707 | return -EINVAL; |
708 | ||
709 | driver_override = kstrndup(buf, count, GFP_KERNEL); | |
710 | if (!driver_override) | |
711 | return -ENOMEM; | |
712 | ||
713 | cp = strchr(driver_override, '\n'); | |
714 | if (cp) | |
715 | *cp = '\0'; | |
716 | ||
9561475d NS |
717 | device_lock(dev); |
718 | old = pdev->driver_override; | |
782a985d AW |
719 | if (strlen(driver_override)) { |
720 | pdev->driver_override = driver_override; | |
721 | } else { | |
722 | kfree(driver_override); | |
723 | pdev->driver_override = NULL; | |
724 | } | |
9561475d | 725 | device_unlock(dev); |
782a985d AW |
726 | |
727 | kfree(old); | |
728 | ||
729 | return count; | |
730 | } | |
731 | ||
732 | static ssize_t driver_override_show(struct device *dev, | |
733 | struct device_attribute *attr, char *buf) | |
734 | { | |
735 | struct pci_dev *pdev = to_pci_dev(dev); | |
9561475d | 736 | ssize_t len; |
782a985d | 737 | |
9561475d NS |
738 | device_lock(dev); |
739 | len = snprintf(buf, PAGE_SIZE, "%s\n", pdev->driver_override); | |
740 | device_unlock(dev); | |
741 | return len; | |
782a985d AW |
742 | } |
743 | static DEVICE_ATTR_RW(driver_override); | |
744 | ||
bf22c90f | 745 | static struct attribute *pci_dev_attrs[] = { |
5136b2da GKH |
746 | &dev_attr_resource.attr, |
747 | &dev_attr_vendor.attr, | |
748 | &dev_attr_device.attr, | |
749 | &dev_attr_subsystem_vendor.attr, | |
750 | &dev_attr_subsystem_device.attr, | |
702ed3be | 751 | &dev_attr_revision.attr, |
5136b2da GKH |
752 | &dev_attr_class.attr, |
753 | &dev_attr_irq.attr, | |
754 | &dev_attr_local_cpus.attr, | |
755 | &dev_attr_local_cpulist.attr, | |
756 | &dev_attr_modalias.attr, | |
81bb0e19 | 757 | #ifdef CONFIG_NUMA |
5136b2da | 758 | &dev_attr_numa_node.attr, |
81bb0e19 | 759 | #endif |
5136b2da GKH |
760 | &dev_attr_dma_mask_bits.attr, |
761 | &dev_attr_consistent_dma_mask_bits.attr, | |
d8e7d53a | 762 | &dev_attr_enable.attr, |
5136b2da GKH |
763 | &dev_attr_broken_parity_status.attr, |
764 | &dev_attr_msi_bus.attr, | |
fbb988be | 765 | #if defined(CONFIG_PM) && defined(CONFIG_ACPI) |
5136b2da | 766 | &dev_attr_d3cold_allowed.attr, |
dfc73e7a SO |
767 | #endif |
768 | #ifdef CONFIG_OF | |
769 | &dev_attr_devspec.attr, | |
77c27c7b | 770 | #endif |
782a985d | 771 | &dev_attr_driver_override.attr, |
0077a845 | 772 | &dev_attr_ari_enabled.attr, |
5136b2da GKH |
773 | NULL, |
774 | }; | |
775 | ||
56c1af46 WVK |
776 | static struct attribute *pci_bridge_attrs[] = { |
777 | &dev_attr_subordinate_bus_number.attr, | |
778 | &dev_attr_secondary_bus_number.attr, | |
779 | NULL, | |
5136b2da GKH |
780 | }; |
781 | ||
56c1af46 WVK |
782 | static struct attribute *pcie_dev_attrs[] = { |
783 | &dev_attr_current_link_speed.attr, | |
784 | &dev_attr_current_link_width.attr, | |
785 | &dev_attr_max_link_width.attr, | |
786 | &dev_attr_max_link_speed.attr, | |
5136b2da | 787 | NULL, |
1da177e4 LT |
788 | }; |
789 | ||
56039e65 GKH |
790 | static struct attribute *pcibus_attrs[] = { |
791 | &dev_attr_rescan.attr, | |
792 | &dev_attr_cpuaffinity.attr, | |
793 | &dev_attr_cpulistaffinity.attr, | |
794 | NULL, | |
795 | }; | |
796 | ||
797 | static const struct attribute_group pcibus_group = { | |
798 | .attrs = pcibus_attrs, | |
799 | }; | |
800 | ||
801 | const struct attribute_group *pcibus_groups[] = { | |
802 | &pcibus_group, | |
803 | NULL, | |
b9d320fc YL |
804 | }; |
805 | ||
3c78bc61 RD |
806 | static ssize_t boot_vga_show(struct device *dev, struct device_attribute *attr, |
807 | char *buf) | |
217f45de DA |
808 | { |
809 | struct pci_dev *pdev = to_pci_dev(dev); | |
1a39b310 MG |
810 | struct pci_dev *vga_dev = vga_default_device(); |
811 | ||
812 | if (vga_dev) | |
813 | return sprintf(buf, "%u\n", (pdev == vga_dev)); | |
217f45de DA |
814 | |
815 | return sprintf(buf, "%u\n", | |
816 | !!(pdev->resource[PCI_ROM_RESOURCE].flags & | |
817 | IORESOURCE_ROM_SHADOW)); | |
818 | } | |
bf22c90f | 819 | static struct device_attribute vga_attr = __ATTR_RO(boot_vga); |
217f45de | 820 | |
3c78bc61 RD |
821 | static ssize_t pci_read_config(struct file *filp, struct kobject *kobj, |
822 | struct bin_attribute *bin_attr, char *buf, | |
823 | loff_t off, size_t count) | |
1da177e4 | 824 | { |
554a6037 | 825 | struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj)); |
1da177e4 LT |
826 | unsigned int size = 64; |
827 | loff_t init_off = off; | |
3c78bc61 | 828 | u8 *data = (u8 *) buf; |
1da177e4 LT |
829 | |
830 | /* Several chips lock up trying to read undefined config space */ | |
ab0fa82b | 831 | if (file_ns_capable(filp, &init_user_ns, CAP_SYS_ADMIN)) |
1da177e4 | 832 | size = dev->cfg_size; |
3c78bc61 | 833 | else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) |
1da177e4 | 834 | size = 128; |
1da177e4 LT |
835 | |
836 | if (off > size) | |
837 | return 0; | |
838 | if (off + count > size) { | |
839 | size -= off; | |
840 | count = size; | |
841 | } else { | |
842 | size = count; | |
843 | } | |
844 | ||
3d8387ef HY |
845 | pci_config_pm_runtime_get(dev); |
846 | ||
4c0619ad | 847 | if ((off & 1) && size) { |
848 | u8 val; | |
e04b0ea2 | 849 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 850 | data[off - init_off] = val; |
1da177e4 | 851 | off++; |
4c0619ad | 852 | size--; |
853 | } | |
854 | ||
855 | if ((off & 3) && size > 2) { | |
856 | u16 val; | |
e04b0ea2 | 857 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 858 | data[off - init_off] = val & 0xff; |
859 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
860 | off += 2; | |
861 | size -= 2; | |
1da177e4 LT |
862 | } |
863 | ||
864 | while (size > 3) { | |
4c0619ad | 865 | u32 val; |
e04b0ea2 | 866 | pci_user_read_config_dword(dev, off, &val); |
4c0619ad | 867 | data[off - init_off] = val & 0xff; |
868 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
869 | data[off - init_off + 2] = (val >> 16) & 0xff; | |
870 | data[off - init_off + 3] = (val >> 24) & 0xff; | |
1da177e4 LT |
871 | off += 4; |
872 | size -= 4; | |
873 | } | |
874 | ||
4c0619ad | 875 | if (size >= 2) { |
876 | u16 val; | |
e04b0ea2 | 877 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 878 | data[off - init_off] = val & 0xff; |
879 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
880 | off += 2; | |
881 | size -= 2; | |
882 | } | |
883 | ||
884 | if (size > 0) { | |
885 | u8 val; | |
e04b0ea2 | 886 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 887 | data[off - init_off] = val; |
1da177e4 LT |
888 | off++; |
889 | --size; | |
890 | } | |
891 | ||
3d8387ef HY |
892 | pci_config_pm_runtime_put(dev); |
893 | ||
1da177e4 LT |
894 | return count; |
895 | } | |
896 | ||
3c78bc61 RD |
897 | static ssize_t pci_write_config(struct file *filp, struct kobject *kobj, |
898 | struct bin_attribute *bin_attr, char *buf, | |
899 | loff_t off, size_t count) | |
1da177e4 | 900 | { |
554a6037 | 901 | struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj)); |
1da177e4 LT |
902 | unsigned int size = count; |
903 | loff_t init_off = off; | |
3c78bc61 | 904 | u8 *data = (u8 *) buf; |
1da177e4 LT |
905 | |
906 | if (off > dev->cfg_size) | |
907 | return 0; | |
908 | if (off + count > dev->cfg_size) { | |
909 | size = dev->cfg_size - off; | |
910 | count = size; | |
911 | } | |
f7625980 | 912 | |
3d8387ef HY |
913 | pci_config_pm_runtime_get(dev); |
914 | ||
4c0619ad | 915 | if ((off & 1) && size) { |
e04b0ea2 | 916 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 | 917 | off++; |
4c0619ad | 918 | size--; |
1da177e4 | 919 | } |
f7625980 | 920 | |
4c0619ad | 921 | if ((off & 3) && size > 2) { |
922 | u16 val = data[off - init_off]; | |
923 | val |= (u16) data[off - init_off + 1] << 8; | |
3c78bc61 RD |
924 | pci_user_write_config_word(dev, off, val); |
925 | off += 2; | |
926 | size -= 2; | |
927 | } | |
1da177e4 LT |
928 | |
929 | while (size > 3) { | |
4c0619ad | 930 | u32 val = data[off - init_off]; |
931 | val |= (u32) data[off - init_off + 1] << 8; | |
932 | val |= (u32) data[off - init_off + 2] << 16; | |
933 | val |= (u32) data[off - init_off + 3] << 24; | |
e04b0ea2 | 934 | pci_user_write_config_dword(dev, off, val); |
1da177e4 LT |
935 | off += 4; |
936 | size -= 4; | |
937 | } | |
f7625980 | 938 | |
4c0619ad | 939 | if (size >= 2) { |
940 | u16 val = data[off - init_off]; | |
941 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 942 | pci_user_write_config_word(dev, off, val); |
4c0619ad | 943 | off += 2; |
944 | size -= 2; | |
945 | } | |
1da177e4 | 946 | |
4c0619ad | 947 | if (size) { |
e04b0ea2 | 948 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 LT |
949 | off++; |
950 | --size; | |
951 | } | |
952 | ||
3d8387ef HY |
953 | pci_config_pm_runtime_put(dev); |
954 | ||
1da177e4 LT |
955 | return count; |
956 | } | |
957 | ||
958 | #ifdef HAVE_PCI_LEGACY | |
959 | /** | |
960 | * pci_read_legacy_io - read byte(s) from legacy I/O port space | |
2c3c8bea | 961 | * @filp: open sysfs file |
1da177e4 | 962 | * @kobj: kobject corresponding to file to read from |
cffb2faf | 963 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
964 | * @buf: buffer to store results |
965 | * @off: offset into legacy I/O port space | |
966 | * @count: number of bytes to read | |
967 | * | |
968 | * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
969 | * callback routine (pci_legacy_read). | |
970 | */ | |
3c78bc61 RD |
971 | static ssize_t pci_read_legacy_io(struct file *filp, struct kobject *kobj, |
972 | struct bin_attribute *bin_attr, char *buf, | |
973 | loff_t off, size_t count) | |
1da177e4 | 974 | { |
554a6037 | 975 | struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); |
1da177e4 | 976 | |
3c78bc61 RD |
977 | /* Only support 1, 2 or 4 byte accesses */ |
978 | if (count != 1 && count != 2 && count != 4) | |
979 | return -EINVAL; | |
1da177e4 | 980 | |
3c78bc61 | 981 | return pci_legacy_read(bus, off, (u32 *)buf, count); |
1da177e4 LT |
982 | } |
983 | ||
984 | /** | |
985 | * pci_write_legacy_io - write byte(s) to legacy I/O port space | |
2c3c8bea | 986 | * @filp: open sysfs file |
1da177e4 | 987 | * @kobj: kobject corresponding to file to read from |
cffb2faf | 988 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
989 | * @buf: buffer containing value to be written |
990 | * @off: offset into legacy I/O port space | |
991 | * @count: number of bytes to write | |
992 | * | |
993 | * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
994 | * callback routine (pci_legacy_write). | |
995 | */ | |
3c78bc61 RD |
996 | static ssize_t pci_write_legacy_io(struct file *filp, struct kobject *kobj, |
997 | struct bin_attribute *bin_attr, char *buf, | |
998 | loff_t off, size_t count) | |
1da177e4 | 999 | { |
554a6037 | 1000 | struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); |
1da177e4 | 1001 | |
3c78bc61 RD |
1002 | /* Only support 1, 2 or 4 byte accesses */ |
1003 | if (count != 1 && count != 2 && count != 4) | |
1004 | return -EINVAL; | |
1005 | ||
1006 | return pci_legacy_write(bus, off, *(u32 *)buf, count); | |
1da177e4 LT |
1007 | } |
1008 | ||
1009 | /** | |
1010 | * pci_mmap_legacy_mem - map legacy PCI memory into user memory space | |
2c3c8bea | 1011 | * @filp: open sysfs file |
1da177e4 LT |
1012 | * @kobj: kobject corresponding to device to be mapped |
1013 | * @attr: struct bin_attribute for this file | |
1014 | * @vma: struct vm_area_struct passed to mmap | |
1015 | * | |
f19aeb1f | 1016 | * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap |
1da177e4 LT |
1017 | * legacy memory space (first meg of bus space) into application virtual |
1018 | * memory space. | |
1019 | */ | |
3c78bc61 RD |
1020 | static int pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj, |
1021 | struct bin_attribute *attr, | |
1022 | struct vm_area_struct *vma) | |
1da177e4 | 1023 | { |
554a6037 | 1024 | struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); |
1da177e4 | 1025 | |
3c78bc61 | 1026 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem); |
f19aeb1f BH |
1027 | } |
1028 | ||
1029 | /** | |
1030 | * pci_mmap_legacy_io - map legacy PCI IO into user memory space | |
2c3c8bea | 1031 | * @filp: open sysfs file |
f19aeb1f BH |
1032 | * @kobj: kobject corresponding to device to be mapped |
1033 | * @attr: struct bin_attribute for this file | |
1034 | * @vma: struct vm_area_struct passed to mmap | |
1035 | * | |
1036 | * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap | |
1037 | * legacy IO space (first meg of bus space) into application virtual | |
1038 | * memory space. Returns -ENOSYS if the operation isn't supported | |
1039 | */ | |
3c78bc61 RD |
1040 | static int pci_mmap_legacy_io(struct file *filp, struct kobject *kobj, |
1041 | struct bin_attribute *attr, | |
1042 | struct vm_area_struct *vma) | |
f19aeb1f | 1043 | { |
554a6037 | 1044 | struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); |
f19aeb1f | 1045 | |
3c78bc61 | 1046 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io); |
f19aeb1f BH |
1047 | } |
1048 | ||
10a0ef39 IK |
1049 | /** |
1050 | * pci_adjust_legacy_attr - adjustment of legacy file attributes | |
1051 | * @b: bus to create files under | |
1052 | * @mmap_type: I/O port or memory | |
1053 | * | |
1054 | * Stub implementation. Can be overridden by arch if necessary. | |
1055 | */ | |
3c78bc61 RD |
1056 | void __weak pci_adjust_legacy_attr(struct pci_bus *b, |
1057 | enum pci_mmap_state mmap_type) | |
10a0ef39 | 1058 | { |
10a0ef39 IK |
1059 | } |
1060 | ||
f19aeb1f BH |
1061 | /** |
1062 | * pci_create_legacy_files - create legacy I/O port and memory files | |
1063 | * @b: bus to create files under | |
1064 | * | |
1065 | * Some platforms allow access to legacy I/O port and ISA memory space on | |
1066 | * a per-bus basis. This routine creates the files and ties them into | |
1067 | * their associated read, write and mmap files from pci-sysfs.c | |
1068 | * | |
25985edc | 1069 | * On error unwind, but don't propagate the error to the caller |
f19aeb1f BH |
1070 | * as it is ok to set up the PCI bus without these files. |
1071 | */ | |
1072 | void pci_create_legacy_files(struct pci_bus *b) | |
1073 | { | |
1074 | int error; | |
1075 | ||
1076 | b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2, | |
1077 | GFP_ATOMIC); | |
1078 | if (!b->legacy_io) | |
1079 | goto kzalloc_err; | |
1080 | ||
62e877b8 | 1081 | sysfs_bin_attr_init(b->legacy_io); |
f19aeb1f BH |
1082 | b->legacy_io->attr.name = "legacy_io"; |
1083 | b->legacy_io->size = 0xffff; | |
1084 | b->legacy_io->attr.mode = S_IRUSR | S_IWUSR; | |
1085 | b->legacy_io->read = pci_read_legacy_io; | |
1086 | b->legacy_io->write = pci_write_legacy_io; | |
1087 | b->legacy_io->mmap = pci_mmap_legacy_io; | |
10a0ef39 | 1088 | pci_adjust_legacy_attr(b, pci_mmap_io); |
f19aeb1f BH |
1089 | error = device_create_bin_file(&b->dev, b->legacy_io); |
1090 | if (error) | |
1091 | goto legacy_io_err; | |
1092 | ||
1093 | /* Allocated above after the legacy_io struct */ | |
1094 | b->legacy_mem = b->legacy_io + 1; | |
6757eca3 | 1095 | sysfs_bin_attr_init(b->legacy_mem); |
f19aeb1f BH |
1096 | b->legacy_mem->attr.name = "legacy_mem"; |
1097 | b->legacy_mem->size = 1024*1024; | |
1098 | b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR; | |
1099 | b->legacy_mem->mmap = pci_mmap_legacy_mem; | |
10a0ef39 | 1100 | pci_adjust_legacy_attr(b, pci_mmap_mem); |
f19aeb1f BH |
1101 | error = device_create_bin_file(&b->dev, b->legacy_mem); |
1102 | if (error) | |
1103 | goto legacy_mem_err; | |
1104 | ||
1105 | return; | |
1106 | ||
1107 | legacy_mem_err: | |
1108 | device_remove_bin_file(&b->dev, b->legacy_io); | |
1109 | legacy_io_err: | |
1110 | kfree(b->legacy_io); | |
1111 | b->legacy_io = NULL; | |
1112 | kzalloc_err: | |
227f0647 | 1113 | printk(KERN_WARNING "pci: warning: could not create legacy I/O port and ISA memory resources to sysfs\n"); |
f19aeb1f BH |
1114 | return; |
1115 | } | |
1116 | ||
1117 | void pci_remove_legacy_files(struct pci_bus *b) | |
1118 | { | |
1119 | if (b->legacy_io) { | |
1120 | device_remove_bin_file(&b->dev, b->legacy_io); | |
1121 | device_remove_bin_file(&b->dev, b->legacy_mem); | |
1122 | kfree(b->legacy_io); /* both are allocated here */ | |
1123 | } | |
1da177e4 LT |
1124 | } |
1125 | #endif /* HAVE_PCI_LEGACY */ | |
1126 | ||
f7195824 | 1127 | #if defined(HAVE_PCI_MMAP) || defined(ARCH_GENERIC_PCI_MMAP_RESOURCE) |
b5ff7df3 | 1128 | |
3b519e4e MW |
1129 | int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma, |
1130 | enum pci_mmap_api mmap_api) | |
b5ff7df3 | 1131 | { |
6bccc7f4 DW |
1132 | unsigned long nr, start, size; |
1133 | resource_size_t pci_start = 0, pci_end; | |
b5ff7df3 | 1134 | |
3b519e4e MW |
1135 | if (pci_resource_len(pdev, resno) == 0) |
1136 | return 0; | |
64b00175 | 1137 | nr = vma_pages(vma); |
b5ff7df3 | 1138 | start = vma->vm_pgoff; |
88e7df0b | 1139 | size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1; |
6bccc7f4 DW |
1140 | if (mmap_api == PCI_MMAP_PROCFS) { |
1141 | pci_resource_to_user(pdev, resno, &pdev->resource[resno], | |
1142 | &pci_start, &pci_end); | |
1143 | pci_start >>= PAGE_SHIFT; | |
1144 | } | |
3b519e4e MW |
1145 | if (start >= pci_start && start < pci_start + size && |
1146 | start + nr <= pci_start + size) | |
b5ff7df3 | 1147 | return 1; |
b5ff7df3 LT |
1148 | return 0; |
1149 | } | |
1150 | ||
1da177e4 LT |
1151 | /** |
1152 | * pci_mmap_resource - map a PCI resource into user memory space | |
1153 | * @kobj: kobject for mapping | |
1154 | * @attr: struct bin_attribute for the file being mapped | |
1155 | * @vma: struct vm_area_struct passed into the mmap | |
45aec1ae | 1156 | * @write_combine: 1 for write_combine mapping |
1da177e4 LT |
1157 | * |
1158 | * Use the regular PCI mapping routines to map a PCI resource into userspace. | |
1da177e4 | 1159 | */ |
3c78bc61 RD |
1160 | static int pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr, |
1161 | struct vm_area_struct *vma, int write_combine) | |
1da177e4 | 1162 | { |
554a6037 | 1163 | struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); |
dca40b18 | 1164 | int bar = (unsigned long)attr->private; |
1da177e4 | 1165 | enum pci_mmap_state mmap_type; |
dca40b18 | 1166 | struct resource *res = &pdev->resource[bar]; |
2311b1f2 | 1167 | |
ca620723 BH |
1168 | if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(res->start)) |
1169 | return -EINVAL; | |
1170 | ||
7a094909 | 1171 | if (!pci_mmap_fits(pdev, bar, vma, PCI_MMAP_SYSFS)) |
b5ff7df3 | 1172 | return -EINVAL; |
7a094909 | 1173 | |
1da177e4 | 1174 | mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io; |
f7195824 DW |
1175 | |
1176 | return pci_mmap_resource_range(pdev, bar, vma, mmap_type, write_combine); | |
45aec1ae | 1177 | } |
1178 | ||
3c78bc61 RD |
1179 | static int pci_mmap_resource_uc(struct file *filp, struct kobject *kobj, |
1180 | struct bin_attribute *attr, | |
1181 | struct vm_area_struct *vma) | |
45aec1ae | 1182 | { |
1183 | return pci_mmap_resource(kobj, attr, vma, 0); | |
1184 | } | |
1185 | ||
3c78bc61 RD |
1186 | static int pci_mmap_resource_wc(struct file *filp, struct kobject *kobj, |
1187 | struct bin_attribute *attr, | |
1188 | struct vm_area_struct *vma) | |
45aec1ae | 1189 | { |
1190 | return pci_mmap_resource(kobj, attr, vma, 1); | |
1da177e4 LT |
1191 | } |
1192 | ||
3c78bc61 RD |
1193 | static ssize_t pci_resource_io(struct file *filp, struct kobject *kobj, |
1194 | struct bin_attribute *attr, char *buf, | |
1195 | loff_t off, size_t count, bool write) | |
8633328b | 1196 | { |
554a6037 | 1197 | struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); |
dca40b18 | 1198 | int bar = (unsigned long)attr->private; |
8633328b | 1199 | unsigned long port = off; |
8633328b | 1200 | |
dca40b18 | 1201 | port += pci_resource_start(pdev, bar); |
8633328b | 1202 | |
dca40b18 | 1203 | if (port > pci_resource_end(pdev, bar)) |
8633328b AW |
1204 | return 0; |
1205 | ||
dca40b18 | 1206 | if (port + count - 1 > pci_resource_end(pdev, bar)) |
8633328b AW |
1207 | return -EINVAL; |
1208 | ||
1209 | switch (count) { | |
1210 | case 1: | |
1211 | if (write) | |
1212 | outb(*(u8 *)buf, port); | |
1213 | else | |
1214 | *(u8 *)buf = inb(port); | |
1215 | return 1; | |
1216 | case 2: | |
1217 | if (write) | |
1218 | outw(*(u16 *)buf, port); | |
1219 | else | |
1220 | *(u16 *)buf = inw(port); | |
1221 | return 2; | |
1222 | case 4: | |
1223 | if (write) | |
1224 | outl(*(u32 *)buf, port); | |
1225 | else | |
1226 | *(u32 *)buf = inl(port); | |
1227 | return 4; | |
1228 | } | |
1229 | return -EINVAL; | |
1230 | } | |
1231 | ||
3c78bc61 RD |
1232 | static ssize_t pci_read_resource_io(struct file *filp, struct kobject *kobj, |
1233 | struct bin_attribute *attr, char *buf, | |
1234 | loff_t off, size_t count) | |
8633328b AW |
1235 | { |
1236 | return pci_resource_io(filp, kobj, attr, buf, off, count, false); | |
1237 | } | |
1238 | ||
3c78bc61 RD |
1239 | static ssize_t pci_write_resource_io(struct file *filp, struct kobject *kobj, |
1240 | struct bin_attribute *attr, char *buf, | |
1241 | loff_t off, size_t count) | |
8633328b AW |
1242 | { |
1243 | return pci_resource_io(filp, kobj, attr, buf, off, count, true); | |
1244 | } | |
1245 | ||
b19441af GKH |
1246 | /** |
1247 | * pci_remove_resource_files - cleanup resource files | |
cffb2faf | 1248 | * @pdev: dev to cleanup |
b19441af | 1249 | * |
cffb2faf | 1250 | * If we created resource files for @pdev, remove them from sysfs and |
b19441af GKH |
1251 | * free their resources. |
1252 | */ | |
3c78bc61 | 1253 | static void pci_remove_resource_files(struct pci_dev *pdev) |
b19441af GKH |
1254 | { |
1255 | int i; | |
1256 | ||
1257 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
1258 | struct bin_attribute *res_attr; | |
1259 | ||
1260 | res_attr = pdev->res_attr[i]; | |
1261 | if (res_attr) { | |
1262 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
1263 | kfree(res_attr); | |
1264 | } | |
45aec1ae | 1265 | |
1266 | res_attr = pdev->res_attr_wc[i]; | |
1267 | if (res_attr) { | |
1268 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
1269 | kfree(res_attr); | |
1270 | } | |
b19441af GKH |
1271 | } |
1272 | } | |
1273 | ||
45aec1ae | 1274 | static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine) |
1275 | { | |
1276 | /* allocate attribute structure, piggyback attribute name */ | |
1277 | int name_len = write_combine ? 13 : 10; | |
1278 | struct bin_attribute *res_attr; | |
bd5174df | 1279 | char *res_attr_name; |
45aec1ae | 1280 | int retval; |
1281 | ||
1282 | res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC); | |
bd5174df BH |
1283 | if (!res_attr) |
1284 | return -ENOMEM; | |
1285 | ||
1286 | res_attr_name = (char *)(res_attr + 1); | |
1287 | ||
1288 | sysfs_bin_attr_init(res_attr); | |
1289 | if (write_combine) { | |
1290 | pdev->res_attr_wc[num] = res_attr; | |
1291 | sprintf(res_attr_name, "resource%d_wc", num); | |
1292 | res_attr->mmap = pci_mmap_resource_wc; | |
1293 | } else { | |
1294 | pdev->res_attr[num] = res_attr; | |
1295 | sprintf(res_attr_name, "resource%d", num); | |
e854d8b2 DW |
1296 | if (pci_resource_flags(pdev, num) & IORESOURCE_IO) { |
1297 | res_attr->read = pci_read_resource_io; | |
1298 | res_attr->write = pci_write_resource_io; | |
1299 | if (arch_can_pci_mmap_io()) | |
1300 | res_attr->mmap = pci_mmap_resource_uc; | |
1301 | } else { | |
1302 | res_attr->mmap = pci_mmap_resource_uc; | |
1303 | } | |
bd5174df BH |
1304 | } |
1305 | res_attr->attr.name = res_attr_name; | |
1306 | res_attr->attr.mode = S_IRUSR | S_IWUSR; | |
1307 | res_attr->size = pci_resource_len(pdev, num); | |
dca40b18 | 1308 | res_attr->private = (void *)(unsigned long)num; |
bd5174df BH |
1309 | retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr); |
1310 | if (retval) | |
1311 | kfree(res_attr); | |
45aec1ae | 1312 | |
1313 | return retval; | |
1314 | } | |
1315 | ||
1da177e4 LT |
1316 | /** |
1317 | * pci_create_resource_files - create resource files in sysfs for @dev | |
cffb2faf | 1318 | * @pdev: dev in question |
1da177e4 | 1319 | * |
cffb2faf | 1320 | * Walk the resources in @pdev creating files for each resource available. |
1da177e4 | 1321 | */ |
b19441af | 1322 | static int pci_create_resource_files(struct pci_dev *pdev) |
1da177e4 LT |
1323 | { |
1324 | int i; | |
b19441af | 1325 | int retval; |
1da177e4 LT |
1326 | |
1327 | /* Expose the PCI resources from this device as files */ | |
1328 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
1da177e4 LT |
1329 | |
1330 | /* skip empty resources */ | |
1331 | if (!pci_resource_len(pdev, i)) | |
1332 | continue; | |
1333 | ||
45aec1ae | 1334 | retval = pci_create_attr(pdev, i, 0); |
1335 | /* for prefetchable resources, create a WC mappable file */ | |
ae749c7a DW |
1336 | if (!retval && arch_can_pci_mmap_wc() && |
1337 | pdev->resource[i].flags & IORESOURCE_PREFETCH) | |
45aec1ae | 1338 | retval = pci_create_attr(pdev, i, 1); |
45aec1ae | 1339 | if (retval) { |
1340 | pci_remove_resource_files(pdev); | |
1341 | return retval; | |
1da177e4 LT |
1342 | } |
1343 | } | |
b19441af | 1344 | return 0; |
1da177e4 LT |
1345 | } |
1346 | #else /* !HAVE_PCI_MMAP */ | |
10a0ef39 IK |
1347 | int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; } |
1348 | void __weak pci_remove_resource_files(struct pci_dev *dev) { return; } | |
1da177e4 LT |
1349 | #endif /* HAVE_PCI_MMAP */ |
1350 | ||
1351 | /** | |
1352 | * pci_write_rom - used to enable access to the PCI ROM display | |
2c3c8bea | 1353 | * @filp: sysfs file |
1da177e4 | 1354 | * @kobj: kernel object handle |
cffb2faf | 1355 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
1356 | * @buf: user input |
1357 | * @off: file offset | |
1358 | * @count: number of byte in input | |
1359 | * | |
1360 | * writing anything except 0 enables it | |
1361 | */ | |
3c78bc61 RD |
1362 | static ssize_t pci_write_rom(struct file *filp, struct kobject *kobj, |
1363 | struct bin_attribute *bin_attr, char *buf, | |
1364 | loff_t off, size_t count) | |
1da177e4 | 1365 | { |
554a6037 | 1366 | struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); |
1da177e4 LT |
1367 | |
1368 | if ((off == 0) && (*buf == '0') && (count == 2)) | |
1369 | pdev->rom_attr_enabled = 0; | |
1370 | else | |
1371 | pdev->rom_attr_enabled = 1; | |
1372 | ||
1373 | return count; | |
1374 | } | |
1375 | ||
1376 | /** | |
1377 | * pci_read_rom - read a PCI ROM | |
2c3c8bea | 1378 | * @filp: sysfs file |
1da177e4 | 1379 | * @kobj: kernel object handle |
cffb2faf | 1380 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
1381 | * @buf: where to put the data we read from the ROM |
1382 | * @off: file offset | |
1383 | * @count: number of bytes to read | |
1384 | * | |
1385 | * Put @count bytes starting at @off into @buf from the ROM in the PCI | |
1386 | * device corresponding to @kobj. | |
1387 | */ | |
3c78bc61 RD |
1388 | static ssize_t pci_read_rom(struct file *filp, struct kobject *kobj, |
1389 | struct bin_attribute *bin_attr, char *buf, | |
1390 | loff_t off, size_t count) | |
1da177e4 | 1391 | { |
554a6037 | 1392 | struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); |
1da177e4 LT |
1393 | void __iomem *rom; |
1394 | size_t size; | |
1395 | ||
1396 | if (!pdev->rom_attr_enabled) | |
1397 | return -EINVAL; | |
f7625980 | 1398 | |
1da177e4 | 1399 | rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */ |
97c44836 TN |
1400 | if (!rom || !size) |
1401 | return -EIO; | |
f7625980 | 1402 | |
1da177e4 LT |
1403 | if (off >= size) |
1404 | count = 0; | |
1405 | else { | |
1406 | if (off + count > size) | |
1407 | count = size - off; | |
f7625980 | 1408 | |
1da177e4 LT |
1409 | memcpy_fromio(buf, rom + off, count); |
1410 | } | |
1411 | pci_unmap_rom(pdev, rom); | |
f7625980 | 1412 | |
1da177e4 LT |
1413 | return count; |
1414 | } | |
1415 | ||
8bdc50ac | 1416 | static const struct bin_attribute pci_config_attr = { |
1da177e4 LT |
1417 | .attr = { |
1418 | .name = "config", | |
1419 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 1420 | }, |
557848c3 | 1421 | .size = PCI_CFG_SPACE_SIZE, |
1da177e4 LT |
1422 | .read = pci_read_config, |
1423 | .write = pci_write_config, | |
1424 | }; | |
1425 | ||
8bdc50ac | 1426 | static const struct bin_attribute pcie_config_attr = { |
1da177e4 LT |
1427 | .attr = { |
1428 | .name = "config", | |
1429 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 1430 | }, |
557848c3 | 1431 | .size = PCI_CFG_SPACE_EXP_SIZE, |
1da177e4 LT |
1432 | .read = pci_read_config, |
1433 | .write = pci_write_config, | |
1434 | }; | |
1435 | ||
3c78bc61 RD |
1436 | static ssize_t reset_store(struct device *dev, struct device_attribute *attr, |
1437 | const char *buf, size_t count) | |
711d5779 MT |
1438 | { |
1439 | struct pci_dev *pdev = to_pci_dev(dev); | |
1440 | unsigned long val; | |
9a994e8e | 1441 | ssize_t result = kstrtoul(buf, 0, &val); |
711d5779 MT |
1442 | |
1443 | if (result < 0) | |
1444 | return result; | |
1445 | ||
1446 | if (val != 1) | |
1447 | return -EINVAL; | |
447c5dd7 MS |
1448 | |
1449 | result = pci_reset_function(pdev); | |
1450 | if (result < 0) | |
1451 | return result; | |
1452 | ||
1453 | return count; | |
711d5779 MT |
1454 | } |
1455 | ||
1456 | static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store); | |
1457 | ||
280c73d3 ZY |
1458 | static int pci_create_capabilities_sysfs(struct pci_dev *dev) |
1459 | { | |
1460 | int retval; | |
280c73d3 | 1461 | |
b1c615c4 | 1462 | pcie_vpd_create_sysfs_dev_files(dev); |
280c73d3 ZY |
1463 | pcie_aspm_create_sysfs_dev_files(dev); |
1464 | ||
5b0764ca | 1465 | if (dev->reset_fn) { |
711d5779 MT |
1466 | retval = device_create_file(&dev->dev, &reset_attr); |
1467 | if (retval) | |
1468 | goto error; | |
711d5779 | 1469 | } |
280c73d3 | 1470 | return 0; |
711d5779 MT |
1471 | |
1472 | error: | |
1473 | pcie_aspm_remove_sysfs_dev_files(dev); | |
b1c615c4 | 1474 | pcie_vpd_remove_sysfs_dev_files(dev); |
711d5779 | 1475 | return retval; |
280c73d3 ZY |
1476 | } |
1477 | ||
3c78bc61 | 1478 | int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev) |
1da177e4 | 1479 | { |
b19441af | 1480 | int retval; |
ac0c302a | 1481 | int rom_size; |
280c73d3 | 1482 | struct bin_attribute *attr; |
b19441af | 1483 | |
1da177e4 LT |
1484 | if (!sysfs_initialized) |
1485 | return -EACCES; | |
1486 | ||
c20aecf6 | 1487 | if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) |
b19441af | 1488 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
c20aecf6 JM |
1489 | else |
1490 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr); | |
b19441af GKH |
1491 | if (retval) |
1492 | goto err; | |
1da177e4 | 1493 | |
b19441af GKH |
1494 | retval = pci_create_resource_files(pdev); |
1495 | if (retval) | |
280c73d3 ZY |
1496 | goto err_config_file; |
1497 | ||
1da177e4 | 1498 | /* If the device has a ROM, try to expose it in sysfs. */ |
ac0c302a | 1499 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); |
280c73d3 | 1500 | if (rom_size) { |
94e61088 | 1501 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); |
280c73d3 | 1502 | if (!attr) { |
b19441af | 1503 | retval = -ENOMEM; |
9890b12a | 1504 | goto err_resource_files; |
1da177e4 | 1505 | } |
a07e4156 | 1506 | sysfs_bin_attr_init(attr); |
280c73d3 ZY |
1507 | attr->size = rom_size; |
1508 | attr->attr.name = "rom"; | |
ff29530e | 1509 | attr->attr.mode = S_IRUSR | S_IWUSR; |
280c73d3 ZY |
1510 | attr->read = pci_read_rom; |
1511 | attr->write = pci_write_rom; | |
1512 | retval = sysfs_create_bin_file(&pdev->dev.kobj, attr); | |
1513 | if (retval) { | |
1514 | kfree(attr); | |
1515 | goto err_resource_files; | |
1516 | } | |
1517 | pdev->rom_attr = attr; | |
1da177e4 | 1518 | } |
280c73d3 | 1519 | |
280c73d3 ZY |
1520 | /* add sysfs entries for various capabilities */ |
1521 | retval = pci_create_capabilities_sysfs(pdev); | |
1522 | if (retval) | |
625e1d59 | 1523 | goto err_rom_file; |
7d715a6c | 1524 | |
911e1c9b N |
1525 | pci_create_firmware_label_files(pdev); |
1526 | ||
1da177e4 | 1527 | return 0; |
b19441af | 1528 | |
a2cd52ca | 1529 | err_rom_file: |
9d88b93b | 1530 | if (pdev->rom_attr) { |
94e61088 | 1531 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); |
280c73d3 ZY |
1532 | kfree(pdev->rom_attr); |
1533 | pdev->rom_attr = NULL; | |
1534 | } | |
9890b12a ME |
1535 | err_resource_files: |
1536 | pci_remove_resource_files(pdev); | |
94e61088 | 1537 | err_config_file: |
c20aecf6 | 1538 | if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) |
b19441af | 1539 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
c20aecf6 JM |
1540 | else |
1541 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); | |
b19441af GKH |
1542 | err: |
1543 | return retval; | |
1da177e4 LT |
1544 | } |
1545 | ||
280c73d3 ZY |
1546 | static void pci_remove_capabilities_sysfs(struct pci_dev *dev) |
1547 | { | |
b1c615c4 | 1548 | pcie_vpd_remove_sysfs_dev_files(dev); |
280c73d3 | 1549 | pcie_aspm_remove_sysfs_dev_files(dev); |
711d5779 MT |
1550 | if (dev->reset_fn) { |
1551 | device_remove_file(&dev->dev, &reset_attr); | |
1552 | dev->reset_fn = 0; | |
1553 | } | |
280c73d3 ZY |
1554 | } |
1555 | ||
1da177e4 LT |
1556 | /** |
1557 | * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files | |
1558 | * @pdev: device whose entries we should free | |
1559 | * | |
1560 | * Cleanup when @pdev is removed from sysfs. | |
1561 | */ | |
1562 | void pci_remove_sysfs_dev_files(struct pci_dev *pdev) | |
1563 | { | |
d67afe5e DM |
1564 | if (!sysfs_initialized) |
1565 | return; | |
1566 | ||
280c73d3 | 1567 | pci_remove_capabilities_sysfs(pdev); |
7d715a6c | 1568 | |
c20aecf6 | 1569 | if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) |
1da177e4 | 1570 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
c20aecf6 JM |
1571 | else |
1572 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); | |
1da177e4 LT |
1573 | |
1574 | pci_remove_resource_files(pdev); | |
1575 | ||
9d88b93b | 1576 | if (pdev->rom_attr) { |
280c73d3 ZY |
1577 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); |
1578 | kfree(pdev->rom_attr); | |
9d88b93b | 1579 | pdev->rom_attr = NULL; |
1da177e4 | 1580 | } |
911e1c9b N |
1581 | |
1582 | pci_remove_firmware_label_files(pdev); | |
1da177e4 LT |
1583 | } |
1584 | ||
1585 | static int __init pci_sysfs_init(void) | |
1586 | { | |
1587 | struct pci_dev *pdev = NULL; | |
b19441af GKH |
1588 | int retval; |
1589 | ||
1da177e4 | 1590 | sysfs_initialized = 1; |
b19441af GKH |
1591 | for_each_pci_dev(pdev) { |
1592 | retval = pci_create_sysfs_dev_files(pdev); | |
151fc5df JL |
1593 | if (retval) { |
1594 | pci_dev_put(pdev); | |
b19441af | 1595 | return retval; |
151fc5df | 1596 | } |
b19441af | 1597 | } |
1da177e4 LT |
1598 | |
1599 | return 0; | |
1600 | } | |
40ee9e9f | 1601 | late_initcall(pci_sysfs_init); |
4e15c46b YL |
1602 | |
1603 | static struct attribute *pci_dev_dev_attrs[] = { | |
625e1d59 | 1604 | &vga_attr.attr, |
4e15c46b YL |
1605 | NULL, |
1606 | }; | |
1607 | ||
1608 | static umode_t pci_dev_attrs_are_visible(struct kobject *kobj, | |
3c78bc61 | 1609 | struct attribute *a, int n) |
4e15c46b | 1610 | { |
554a6037 | 1611 | struct device *dev = kobj_to_dev(kobj); |
625e1d59 YL |
1612 | struct pci_dev *pdev = to_pci_dev(dev); |
1613 | ||
1614 | if (a == &vga_attr.attr) | |
1615 | if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
1616 | return 0; | |
1617 | ||
4e15c46b YL |
1618 | return a->mode; |
1619 | } | |
1620 | ||
dfab88be JL |
1621 | static struct attribute *pci_dev_hp_attrs[] = { |
1622 | &dev_remove_attr.attr, | |
1623 | &dev_rescan_attr.attr, | |
1624 | NULL, | |
1625 | }; | |
1626 | ||
1627 | static umode_t pci_dev_hp_attrs_are_visible(struct kobject *kobj, | |
3c78bc61 | 1628 | struct attribute *a, int n) |
dfab88be | 1629 | { |
554a6037 | 1630 | struct device *dev = kobj_to_dev(kobj); |
dfab88be JL |
1631 | struct pci_dev *pdev = to_pci_dev(dev); |
1632 | ||
1633 | if (pdev->is_virtfn) | |
1634 | return 0; | |
1635 | ||
1636 | return a->mode; | |
1637 | } | |
1638 | ||
56c1af46 WVK |
1639 | static umode_t pci_bridge_attrs_are_visible(struct kobject *kobj, |
1640 | struct attribute *a, int n) | |
1641 | { | |
1642 | struct device *dev = kobj_to_dev(kobj); | |
1643 | struct pci_dev *pdev = to_pci_dev(dev); | |
1644 | ||
1645 | if (pci_is_bridge(pdev)) | |
1646 | return a->mode; | |
1647 | ||
1648 | return 0; | |
1649 | } | |
1650 | ||
1651 | static umode_t pcie_dev_attrs_are_visible(struct kobject *kobj, | |
1652 | struct attribute *a, int n) | |
1653 | { | |
1654 | struct device *dev = kobj_to_dev(kobj); | |
1655 | struct pci_dev *pdev = to_pci_dev(dev); | |
1656 | ||
1657 | if (pci_is_pcie(pdev)) | |
1658 | return a->mode; | |
1659 | ||
1660 | return 0; | |
1661 | } | |
1662 | ||
1663 | static const struct attribute_group pci_dev_group = { | |
1664 | .attrs = pci_dev_attrs, | |
1665 | }; | |
1666 | ||
1667 | const struct attribute_group *pci_dev_groups[] = { | |
1668 | &pci_dev_group, | |
1669 | NULL, | |
1670 | }; | |
1671 | ||
1672 | static const struct attribute_group pci_bridge_group = { | |
1673 | .attrs = pci_bridge_attrs, | |
1674 | }; | |
1675 | ||
1676 | const struct attribute_group *pci_bridge_groups[] = { | |
1677 | &pci_bridge_group, | |
1678 | NULL, | |
1679 | }; | |
1680 | ||
1681 | static const struct attribute_group pcie_dev_group = { | |
1682 | .attrs = pcie_dev_attrs, | |
1683 | }; | |
1684 | ||
1685 | const struct attribute_group *pcie_dev_groups[] = { | |
1686 | &pcie_dev_group, | |
1687 | NULL, | |
1688 | }; | |
1689 | ||
e7ea9825 | 1690 | static const struct attribute_group pci_dev_hp_attr_group = { |
dfab88be JL |
1691 | .attrs = pci_dev_hp_attrs, |
1692 | .is_visible = pci_dev_hp_attrs_are_visible, | |
1693 | }; | |
1694 | ||
1789382a DD |
1695 | #ifdef CONFIG_PCI_IOV |
1696 | static struct attribute *sriov_dev_attrs[] = { | |
1697 | &sriov_totalvfs_attr.attr, | |
1698 | &sriov_numvfs_attr.attr, | |
7dfca152 FS |
1699 | &sriov_offset_attr.attr, |
1700 | &sriov_stride_attr.attr, | |
1701 | &sriov_vf_device_attr.attr, | |
0e7df224 | 1702 | &sriov_drivers_autoprobe_attr.attr, |
1789382a DD |
1703 | NULL, |
1704 | }; | |
1705 | ||
1706 | static umode_t sriov_attrs_are_visible(struct kobject *kobj, | |
3c78bc61 | 1707 | struct attribute *a, int n) |
1789382a | 1708 | { |
554a6037 | 1709 | struct device *dev = kobj_to_dev(kobj); |
1789382a DD |
1710 | |
1711 | if (!dev_is_pf(dev)) | |
1712 | return 0; | |
1713 | ||
1714 | return a->mode; | |
1715 | } | |
1716 | ||
e7ea9825 | 1717 | static const struct attribute_group sriov_dev_attr_group = { |
1789382a DD |
1718 | .attrs = sriov_dev_attrs, |
1719 | .is_visible = sriov_attrs_are_visible, | |
1720 | }; | |
1721 | #endif /* CONFIG_PCI_IOV */ | |
1722 | ||
e7ea9825 | 1723 | static const struct attribute_group pci_dev_attr_group = { |
4e15c46b YL |
1724 | .attrs = pci_dev_dev_attrs, |
1725 | .is_visible = pci_dev_attrs_are_visible, | |
1726 | }; | |
1727 | ||
e7ea9825 | 1728 | static const struct attribute_group pci_bridge_attr_group = { |
56c1af46 WVK |
1729 | .attrs = pci_bridge_attrs, |
1730 | .is_visible = pci_bridge_attrs_are_visible, | |
1731 | }; | |
1732 | ||
e7ea9825 | 1733 | static const struct attribute_group pcie_dev_attr_group = { |
56c1af46 WVK |
1734 | .attrs = pcie_dev_attrs, |
1735 | .is_visible = pcie_dev_attrs_are_visible, | |
1736 | }; | |
1737 | ||
4e15c46b YL |
1738 | static const struct attribute_group *pci_dev_attr_groups[] = { |
1739 | &pci_dev_attr_group, | |
dfab88be | 1740 | &pci_dev_hp_attr_group, |
1789382a DD |
1741 | #ifdef CONFIG_PCI_IOV |
1742 | &sriov_dev_attr_group, | |
1743 | #endif | |
56c1af46 WVK |
1744 | &pci_bridge_attr_group, |
1745 | &pcie_dev_attr_group, | |
4e15c46b YL |
1746 | NULL, |
1747 | }; | |
1748 | ||
69f2dc24 | 1749 | const struct device_type pci_dev_type = { |
4e15c46b YL |
1750 | .groups = pci_dev_attr_groups, |
1751 | }; |