Commit | Line | Data |
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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 | |
6f5cdfa8 CH |
291 | device_lock(dev); |
292 | if (dev->driver) | |
293 | result = -EBUSY; | |
294 | else if (val) | |
bae94d02 | 295 | result = pci_enable_device(pdev); |
6f5cdfa8 CH |
296 | else if (pci_is_enabled(pdev)) |
297 | pci_disable_device(pdev); | |
298 | else | |
299 | result = -EIO; | |
300 | device_unlock(dev); | |
9f125d30 | 301 | |
bae94d02 IPG |
302 | return result < 0 ? result : count; |
303 | } | |
304 | ||
d8e7d53a | 305 | static ssize_t enable_show(struct device *dev, struct device_attribute *attr, |
3c78bc61 | 306 | char *buf) |
bae94d02 IPG |
307 | { |
308 | struct pci_dev *pdev; | |
9f125d30 | 309 | |
3c78bc61 RD |
310 | pdev = to_pci_dev(dev); |
311 | return sprintf(buf, "%u\n", atomic_read(&pdev->enable_cnt)); | |
9f125d30 | 312 | } |
d8e7d53a | 313 | static DEVICE_ATTR_RW(enable); |
9f125d30 | 314 | |
81bb0e19 | 315 | #ifdef CONFIG_NUMA |
63692df1 PB |
316 | static ssize_t numa_node_store(struct device *dev, |
317 | struct device_attribute *attr, const char *buf, | |
318 | size_t count) | |
319 | { | |
320 | struct pci_dev *pdev = to_pci_dev(dev); | |
321 | int node, ret; | |
322 | ||
323 | if (!capable(CAP_SYS_ADMIN)) | |
324 | return -EPERM; | |
325 | ||
326 | ret = kstrtoint(buf, 0, &node); | |
327 | if (ret) | |
328 | return ret; | |
329 | ||
3dcc8d39 MK |
330 | if ((node < 0 && node != NUMA_NO_NODE) || node >= MAX_NUMNODES) |
331 | return -EINVAL; | |
332 | ||
333 | if (node != NUMA_NO_NODE && !node_online(node)) | |
63692df1 PB |
334 | return -EINVAL; |
335 | ||
336 | add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK); | |
7506dc79 | 337 | pci_alert(pdev, FW_BUG "Overriding NUMA node to %d. Contact your vendor for updates.", |
63692df1 PB |
338 | node); |
339 | ||
340 | dev->numa_node = node; | |
341 | return count; | |
342 | } | |
343 | ||
3c78bc61 RD |
344 | static ssize_t numa_node_show(struct device *dev, struct device_attribute *attr, |
345 | char *buf) | |
81bb0e19 | 346 | { |
3c78bc61 | 347 | return sprintf(buf, "%d\n", dev->numa_node); |
81bb0e19 | 348 | } |
63692df1 | 349 | static DEVICE_ATTR_RW(numa_node); |
81bb0e19 BG |
350 | #endif |
351 | ||
3c78bc61 RD |
352 | static ssize_t dma_mask_bits_show(struct device *dev, |
353 | struct device_attribute *attr, char *buf) | |
bb965401 YL |
354 | { |
355 | struct pci_dev *pdev = to_pci_dev(dev); | |
356 | ||
3c78bc61 | 357 | return sprintf(buf, "%d\n", fls64(pdev->dma_mask)); |
bb965401 | 358 | } |
5136b2da | 359 | static DEVICE_ATTR_RO(dma_mask_bits); |
bb965401 | 360 | |
3c78bc61 RD |
361 | static ssize_t consistent_dma_mask_bits_show(struct device *dev, |
362 | struct device_attribute *attr, | |
363 | char *buf) | |
bb965401 | 364 | { |
3c78bc61 | 365 | return sprintf(buf, "%d\n", fls64(dev->coherent_dma_mask)); |
bb965401 | 366 | } |
5136b2da | 367 | static DEVICE_ATTR_RO(consistent_dma_mask_bits); |
bb965401 | 368 | |
3c78bc61 RD |
369 | static ssize_t msi_bus_show(struct device *dev, struct device_attribute *attr, |
370 | char *buf) | |
fe97064c BG |
371 | { |
372 | struct pci_dev *pdev = to_pci_dev(dev); | |
468ff15a | 373 | struct pci_bus *subordinate = pdev->subordinate; |
fe97064c | 374 | |
468ff15a YW |
375 | return sprintf(buf, "%u\n", subordinate ? |
376 | !(subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) | |
377 | : !pdev->no_msi); | |
fe97064c BG |
378 | } |
379 | ||
3c78bc61 RD |
380 | static ssize_t msi_bus_store(struct device *dev, struct device_attribute *attr, |
381 | const char *buf, size_t count) | |
fe97064c BG |
382 | { |
383 | struct pci_dev *pdev = to_pci_dev(dev); | |
468ff15a | 384 | struct pci_bus *subordinate = pdev->subordinate; |
92425a40 TP |
385 | unsigned long val; |
386 | ||
9a994e8e | 387 | if (kstrtoul(buf, 0, &val) < 0) |
92425a40 | 388 | return -EINVAL; |
fe97064c | 389 | |
fe97064c | 390 | if (!capable(CAP_SYS_ADMIN)) |
92425a40 | 391 | return -EPERM; |
fe97064c | 392 | |
f7625980 | 393 | /* |
468ff15a YW |
394 | * "no_msi" and "bus_flags" only affect what happens when a driver |
395 | * requests MSI or MSI-X. They don't affect any drivers that have | |
396 | * already requested MSI or MSI-X. | |
f7625980 | 397 | */ |
468ff15a YW |
398 | if (!subordinate) { |
399 | pdev->no_msi = !val; | |
7506dc79 | 400 | pci_info(pdev, "MSI/MSI-X %s for future drivers\n", |
468ff15a | 401 | val ? "allowed" : "disallowed"); |
fe97064c | 402 | return count; |
fe97064c BG |
403 | } |
404 | ||
468ff15a YW |
405 | if (val) |
406 | subordinate->bus_flags &= ~PCI_BUS_FLAGS_NO_MSI; | |
407 | else | |
408 | subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI; | |
409 | ||
410 | dev_info(&subordinate->dev, "MSI/MSI-X %s for future drivers of devices on this bus\n", | |
411 | val ? "allowed" : "disallowed"); | |
fe97064c BG |
412 | return count; |
413 | } | |
5136b2da | 414 | static DEVICE_ATTR_RW(msi_bus); |
9888549e | 415 | |
705b1aaa AC |
416 | static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf, |
417 | size_t count) | |
418 | { | |
419 | unsigned long val; | |
420 | struct pci_bus *b = NULL; | |
421 | ||
9a994e8e | 422 | if (kstrtoul(buf, 0, &val) < 0) |
705b1aaa AC |
423 | return -EINVAL; |
424 | ||
425 | if (val) { | |
9d16947b | 426 | pci_lock_rescan_remove(); |
705b1aaa AC |
427 | while ((b = pci_find_next_bus(b)) != NULL) |
428 | pci_rescan_bus(b); | |
9d16947b | 429 | pci_unlock_rescan_remove(); |
705b1aaa AC |
430 | } |
431 | return count; | |
432 | } | |
0f49ba55 | 433 | static BUS_ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store); |
705b1aaa | 434 | |
bf22c90f | 435 | static struct attribute *pci_bus_attrs[] = { |
0f49ba55 GKH |
436 | &bus_attr_rescan.attr, |
437 | NULL, | |
438 | }; | |
439 | ||
440 | static const struct attribute_group pci_bus_group = { | |
441 | .attrs = pci_bus_attrs, | |
442 | }; | |
443 | ||
444 | const struct attribute_group *pci_bus_groups[] = { | |
445 | &pci_bus_group, | |
446 | NULL, | |
705b1aaa | 447 | }; |
77c27c7b | 448 | |
3c78bc61 RD |
449 | static ssize_t dev_rescan_store(struct device *dev, |
450 | struct device_attribute *attr, const char *buf, | |
451 | size_t count) | |
738a6396 AC |
452 | { |
453 | unsigned long val; | |
454 | struct pci_dev *pdev = to_pci_dev(dev); | |
455 | ||
9a994e8e | 456 | if (kstrtoul(buf, 0, &val) < 0) |
738a6396 AC |
457 | return -EINVAL; |
458 | ||
459 | if (val) { | |
9d16947b | 460 | pci_lock_rescan_remove(); |
738a6396 | 461 | pci_rescan_bus(pdev->bus); |
9d16947b | 462 | pci_unlock_rescan_remove(); |
738a6396 AC |
463 | } |
464 | return count; | |
465 | } | |
bf22c90f SK |
466 | static struct device_attribute dev_rescan_attr = __ATTR(rescan, |
467 | (S_IWUSR|S_IWGRP), | |
468 | NULL, dev_rescan_store); | |
738a6396 | 469 | |
3c78bc61 RD |
470 | static ssize_t remove_store(struct device *dev, struct device_attribute *attr, |
471 | const char *buf, size_t count) | |
77c27c7b | 472 | { |
77c27c7b | 473 | unsigned long val; |
77c27c7b | 474 | |
9a994e8e | 475 | if (kstrtoul(buf, 0, &val) < 0) |
77c27c7b AC |
476 | return -EINVAL; |
477 | ||
bc6caf02 TH |
478 | if (val && device_remove_file_self(dev, attr)) |
479 | pci_stop_and_remove_bus_device_locked(to_pci_dev(dev)); | |
77c27c7b AC |
480 | return count; |
481 | } | |
bf22c90f SK |
482 | static struct device_attribute dev_remove_attr = __ATTR(remove, |
483 | (S_IWUSR|S_IWGRP), | |
484 | NULL, remove_store); | |
b9d320fc | 485 | |
3c78bc61 RD |
486 | static ssize_t dev_bus_rescan_store(struct device *dev, |
487 | struct device_attribute *attr, | |
488 | const char *buf, size_t count) | |
b9d320fc YL |
489 | { |
490 | unsigned long val; | |
491 | struct pci_bus *bus = to_pci_bus(dev); | |
492 | ||
9a994e8e | 493 | if (kstrtoul(buf, 0, &val) < 0) |
b9d320fc YL |
494 | return -EINVAL; |
495 | ||
496 | if (val) { | |
9d16947b | 497 | pci_lock_rescan_remove(); |
2f320521 YL |
498 | if (!pci_is_root_bus(bus) && list_empty(&bus->devices)) |
499 | pci_rescan_bus_bridge_resize(bus->self); | |
500 | else | |
501 | pci_rescan_bus(bus); | |
9d16947b | 502 | pci_unlock_rescan_remove(); |
b9d320fc YL |
503 | } |
504 | return count; | |
505 | } | |
56039e65 | 506 | static DEVICE_ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store); |
b9d320fc | 507 | |
fbb988be | 508 | #if defined(CONFIG_PM) && defined(CONFIG_ACPI) |
448bd857 HY |
509 | static ssize_t d3cold_allowed_store(struct device *dev, |
510 | struct device_attribute *attr, | |
511 | const char *buf, size_t count) | |
512 | { | |
513 | struct pci_dev *pdev = to_pci_dev(dev); | |
514 | unsigned long val; | |
515 | ||
9a994e8e | 516 | if (kstrtoul(buf, 0, &val) < 0) |
448bd857 HY |
517 | return -EINVAL; |
518 | ||
519 | pdev->d3cold_allowed = !!val; | |
9d26d3a8 MW |
520 | if (pdev->d3cold_allowed) |
521 | pci_d3cold_enable(pdev); | |
522 | else | |
523 | pci_d3cold_disable(pdev); | |
524 | ||
448bd857 HY |
525 | pm_runtime_resume(dev); |
526 | ||
527 | return count; | |
528 | } | |
529 | ||
530 | static ssize_t d3cold_allowed_show(struct device *dev, | |
531 | struct device_attribute *attr, char *buf) | |
532 | { | |
533 | struct pci_dev *pdev = to_pci_dev(dev); | |
3c78bc61 | 534 | return sprintf(buf, "%u\n", pdev->d3cold_allowed); |
448bd857 | 535 | } |
5136b2da | 536 | static DEVICE_ATTR_RW(d3cold_allowed); |
448bd857 HY |
537 | #endif |
538 | ||
dfc73e7a SO |
539 | #ifdef CONFIG_OF |
540 | static ssize_t devspec_show(struct device *dev, | |
541 | struct device_attribute *attr, char *buf) | |
542 | { | |
543 | struct pci_dev *pdev = to_pci_dev(dev); | |
544 | struct device_node *np = pci_device_to_OF_node(pdev); | |
545 | ||
b63773a8 | 546 | if (np == NULL) |
dfc73e7a | 547 | return 0; |
b63773a8 | 548 | return sprintf(buf, "%pOF", np); |
dfc73e7a SO |
549 | } |
550 | static DEVICE_ATTR_RO(devspec); | |
551 | #endif | |
552 | ||
1789382a DD |
553 | #ifdef CONFIG_PCI_IOV |
554 | static ssize_t sriov_totalvfs_show(struct device *dev, | |
555 | struct device_attribute *attr, | |
556 | char *buf) | |
557 | { | |
558 | struct pci_dev *pdev = to_pci_dev(dev); | |
559 | ||
bff73156 | 560 | return sprintf(buf, "%u\n", pci_sriov_get_totalvfs(pdev)); |
1789382a DD |
561 | } |
562 | ||
563 | ||
564 | static ssize_t sriov_numvfs_show(struct device *dev, | |
565 | struct device_attribute *attr, | |
566 | char *buf) | |
567 | { | |
568 | struct pci_dev *pdev = to_pci_dev(dev); | |
569 | ||
6b136724 | 570 | return sprintf(buf, "%u\n", pdev->sriov->num_VFs); |
1789382a DD |
571 | } |
572 | ||
573 | /* | |
faa48a50 BH |
574 | * num_vfs > 0; number of VFs to enable |
575 | * num_vfs = 0; disable all VFs | |
1789382a DD |
576 | * |
577 | * Note: SRIOV spec doesn't allow partial VF | |
faa48a50 | 578 | * disable, so it's all or none. |
1789382a DD |
579 | */ |
580 | static ssize_t sriov_numvfs_store(struct device *dev, | |
581 | struct device_attribute *attr, | |
582 | const char *buf, size_t count) | |
583 | { | |
584 | struct pci_dev *pdev = to_pci_dev(dev); | |
faa48a50 BH |
585 | int ret; |
586 | u16 num_vfs; | |
1789382a | 587 | |
faa48a50 BH |
588 | ret = kstrtou16(buf, 0, &num_vfs); |
589 | if (ret < 0) | |
590 | return ret; | |
591 | ||
592 | if (num_vfs > pci_sriov_get_totalvfs(pdev)) | |
593 | return -ERANGE; | |
594 | ||
17530e71 | 595 | device_lock(&pdev->dev); |
5b0948df | 596 | |
faa48a50 | 597 | if (num_vfs == pdev->sriov->num_VFs) |
5b0948df | 598 | goto exit; |
1789382a DD |
599 | |
600 | /* is PF driver loaded w/callback */ | |
601 | if (!pdev->driver || !pdev->driver->sriov_configure) { | |
7506dc79 | 602 | pci_info(pdev, "Driver doesn't support SRIOV configuration via sysfs\n"); |
5b0948df ET |
603 | ret = -ENOENT; |
604 | goto exit; | |
1789382a DD |
605 | } |
606 | ||
faa48a50 BH |
607 | if (num_vfs == 0) { |
608 | /* disable VFs */ | |
609 | ret = pdev->driver->sriov_configure(pdev, 0); | |
5b0948df | 610 | goto exit; |
1789382a DD |
611 | } |
612 | ||
faa48a50 BH |
613 | /* enable VFs */ |
614 | if (pdev->sriov->num_VFs) { | |
7506dc79 | 615 | pci_warn(pdev, "%d VFs already enabled. Disable before enabling %d VFs\n", |
faa48a50 | 616 | pdev->sriov->num_VFs, num_vfs); |
5b0948df ET |
617 | ret = -EBUSY; |
618 | goto exit; | |
1789382a DD |
619 | } |
620 | ||
faa48a50 BH |
621 | ret = pdev->driver->sriov_configure(pdev, num_vfs); |
622 | if (ret < 0) | |
5b0948df | 623 | goto exit; |
1789382a | 624 | |
faa48a50 | 625 | if (ret != num_vfs) |
7506dc79 | 626 | pci_warn(pdev, "%d VFs requested; only %d enabled\n", |
faa48a50 BH |
627 | num_vfs, ret); |
628 | ||
5b0948df | 629 | exit: |
17530e71 | 630 | device_unlock(&pdev->dev); |
5b0948df ET |
631 | |
632 | if (ret < 0) | |
633 | return ret; | |
634 | ||
faa48a50 | 635 | return count; |
1789382a DD |
636 | } |
637 | ||
7dfca152 FS |
638 | static ssize_t sriov_offset_show(struct device *dev, |
639 | struct device_attribute *attr, | |
640 | char *buf) | |
641 | { | |
642 | struct pci_dev *pdev = to_pci_dev(dev); | |
643 | ||
644 | return sprintf(buf, "%u\n", pdev->sriov->offset); | |
645 | } | |
646 | ||
647 | static ssize_t sriov_stride_show(struct device *dev, | |
648 | struct device_attribute *attr, | |
649 | char *buf) | |
650 | { | |
651 | struct pci_dev *pdev = to_pci_dev(dev); | |
652 | ||
653 | return sprintf(buf, "%u\n", pdev->sriov->stride); | |
654 | } | |
655 | ||
656 | static ssize_t sriov_vf_device_show(struct device *dev, | |
657 | struct device_attribute *attr, | |
658 | char *buf) | |
659 | { | |
660 | struct pci_dev *pdev = to_pci_dev(dev); | |
661 | ||
662 | return sprintf(buf, "%x\n", pdev->sriov->vf_device); | |
663 | } | |
664 | ||
0e7df224 BW |
665 | static ssize_t sriov_drivers_autoprobe_show(struct device *dev, |
666 | struct device_attribute *attr, | |
667 | char *buf) | |
668 | { | |
669 | struct pci_dev *pdev = to_pci_dev(dev); | |
670 | ||
671 | return sprintf(buf, "%u\n", pdev->sriov->drivers_autoprobe); | |
672 | } | |
673 | ||
674 | static ssize_t sriov_drivers_autoprobe_store(struct device *dev, | |
675 | struct device_attribute *attr, | |
676 | const char *buf, size_t count) | |
677 | { | |
678 | struct pci_dev *pdev = to_pci_dev(dev); | |
679 | bool drivers_autoprobe; | |
680 | ||
681 | if (kstrtobool(buf, &drivers_autoprobe) < 0) | |
682 | return -EINVAL; | |
683 | ||
684 | pdev->sriov->drivers_autoprobe = drivers_autoprobe; | |
685 | ||
686 | return count; | |
687 | } | |
688 | ||
1789382a DD |
689 | static struct device_attribute sriov_totalvfs_attr = __ATTR_RO(sriov_totalvfs); |
690 | static struct device_attribute sriov_numvfs_attr = | |
691 | __ATTR(sriov_numvfs, (S_IRUGO|S_IWUSR|S_IWGRP), | |
692 | sriov_numvfs_show, sriov_numvfs_store); | |
7dfca152 FS |
693 | static struct device_attribute sriov_offset_attr = __ATTR_RO(sriov_offset); |
694 | static struct device_attribute sriov_stride_attr = __ATTR_RO(sriov_stride); | |
695 | static struct device_attribute sriov_vf_device_attr = __ATTR_RO(sriov_vf_device); | |
0e7df224 BW |
696 | static struct device_attribute sriov_drivers_autoprobe_attr = |
697 | __ATTR(sriov_drivers_autoprobe, (S_IRUGO|S_IWUSR|S_IWGRP), | |
698 | sriov_drivers_autoprobe_show, sriov_drivers_autoprobe_store); | |
1789382a DD |
699 | #endif /* CONFIG_PCI_IOV */ |
700 | ||
782a985d AW |
701 | static ssize_t driver_override_store(struct device *dev, |
702 | struct device_attribute *attr, | |
703 | const char *buf, size_t count) | |
704 | { | |
705 | struct pci_dev *pdev = to_pci_dev(dev); | |
9561475d | 706 | char *driver_override, *old, *cp; |
782a985d | 707 | |
4efe874a SL |
708 | /* We need to keep extra room for a newline */ |
709 | if (count >= (PAGE_SIZE - 1)) | |
782a985d AW |
710 | return -EINVAL; |
711 | ||
712 | driver_override = kstrndup(buf, count, GFP_KERNEL); | |
713 | if (!driver_override) | |
714 | return -ENOMEM; | |
715 | ||
716 | cp = strchr(driver_override, '\n'); | |
717 | if (cp) | |
718 | *cp = '\0'; | |
719 | ||
9561475d NS |
720 | device_lock(dev); |
721 | old = pdev->driver_override; | |
782a985d AW |
722 | if (strlen(driver_override)) { |
723 | pdev->driver_override = driver_override; | |
724 | } else { | |
725 | kfree(driver_override); | |
726 | pdev->driver_override = NULL; | |
727 | } | |
9561475d | 728 | device_unlock(dev); |
782a985d AW |
729 | |
730 | kfree(old); | |
731 | ||
732 | return count; | |
733 | } | |
734 | ||
735 | static ssize_t driver_override_show(struct device *dev, | |
736 | struct device_attribute *attr, char *buf) | |
737 | { | |
738 | struct pci_dev *pdev = to_pci_dev(dev); | |
9561475d | 739 | ssize_t len; |
782a985d | 740 | |
9561475d NS |
741 | device_lock(dev); |
742 | len = snprintf(buf, PAGE_SIZE, "%s\n", pdev->driver_override); | |
743 | device_unlock(dev); | |
744 | return len; | |
782a985d AW |
745 | } |
746 | static DEVICE_ATTR_RW(driver_override); | |
747 | ||
bf22c90f | 748 | static struct attribute *pci_dev_attrs[] = { |
5136b2da GKH |
749 | &dev_attr_resource.attr, |
750 | &dev_attr_vendor.attr, | |
751 | &dev_attr_device.attr, | |
752 | &dev_attr_subsystem_vendor.attr, | |
753 | &dev_attr_subsystem_device.attr, | |
702ed3be | 754 | &dev_attr_revision.attr, |
5136b2da GKH |
755 | &dev_attr_class.attr, |
756 | &dev_attr_irq.attr, | |
757 | &dev_attr_local_cpus.attr, | |
758 | &dev_attr_local_cpulist.attr, | |
759 | &dev_attr_modalias.attr, | |
81bb0e19 | 760 | #ifdef CONFIG_NUMA |
5136b2da | 761 | &dev_attr_numa_node.attr, |
81bb0e19 | 762 | #endif |
5136b2da GKH |
763 | &dev_attr_dma_mask_bits.attr, |
764 | &dev_attr_consistent_dma_mask_bits.attr, | |
d8e7d53a | 765 | &dev_attr_enable.attr, |
5136b2da GKH |
766 | &dev_attr_broken_parity_status.attr, |
767 | &dev_attr_msi_bus.attr, | |
fbb988be | 768 | #if defined(CONFIG_PM) && defined(CONFIG_ACPI) |
5136b2da | 769 | &dev_attr_d3cold_allowed.attr, |
dfc73e7a SO |
770 | #endif |
771 | #ifdef CONFIG_OF | |
772 | &dev_attr_devspec.attr, | |
77c27c7b | 773 | #endif |
782a985d | 774 | &dev_attr_driver_override.attr, |
0077a845 | 775 | &dev_attr_ari_enabled.attr, |
5136b2da GKH |
776 | NULL, |
777 | }; | |
778 | ||
56c1af46 WVK |
779 | static struct attribute *pci_bridge_attrs[] = { |
780 | &dev_attr_subordinate_bus_number.attr, | |
781 | &dev_attr_secondary_bus_number.attr, | |
782 | NULL, | |
5136b2da GKH |
783 | }; |
784 | ||
56c1af46 WVK |
785 | static struct attribute *pcie_dev_attrs[] = { |
786 | &dev_attr_current_link_speed.attr, | |
787 | &dev_attr_current_link_width.attr, | |
788 | &dev_attr_max_link_width.attr, | |
789 | &dev_attr_max_link_speed.attr, | |
5136b2da | 790 | NULL, |
1da177e4 LT |
791 | }; |
792 | ||
56039e65 GKH |
793 | static struct attribute *pcibus_attrs[] = { |
794 | &dev_attr_rescan.attr, | |
795 | &dev_attr_cpuaffinity.attr, | |
796 | &dev_attr_cpulistaffinity.attr, | |
797 | NULL, | |
798 | }; | |
799 | ||
800 | static const struct attribute_group pcibus_group = { | |
801 | .attrs = pcibus_attrs, | |
802 | }; | |
803 | ||
804 | const struct attribute_group *pcibus_groups[] = { | |
805 | &pcibus_group, | |
806 | NULL, | |
b9d320fc YL |
807 | }; |
808 | ||
3c78bc61 RD |
809 | static ssize_t boot_vga_show(struct device *dev, struct device_attribute *attr, |
810 | char *buf) | |
217f45de DA |
811 | { |
812 | struct pci_dev *pdev = to_pci_dev(dev); | |
1a39b310 MG |
813 | struct pci_dev *vga_dev = vga_default_device(); |
814 | ||
815 | if (vga_dev) | |
816 | return sprintf(buf, "%u\n", (pdev == vga_dev)); | |
217f45de DA |
817 | |
818 | return sprintf(buf, "%u\n", | |
819 | !!(pdev->resource[PCI_ROM_RESOURCE].flags & | |
820 | IORESOURCE_ROM_SHADOW)); | |
821 | } | |
bf22c90f | 822 | static struct device_attribute vga_attr = __ATTR_RO(boot_vga); |
217f45de | 823 | |
3c78bc61 RD |
824 | static ssize_t pci_read_config(struct file *filp, struct kobject *kobj, |
825 | struct bin_attribute *bin_attr, char *buf, | |
826 | loff_t off, size_t count) | |
1da177e4 | 827 | { |
554a6037 | 828 | struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj)); |
1da177e4 LT |
829 | unsigned int size = 64; |
830 | loff_t init_off = off; | |
3c78bc61 | 831 | u8 *data = (u8 *) buf; |
1da177e4 LT |
832 | |
833 | /* Several chips lock up trying to read undefined config space */ | |
ab0fa82b | 834 | if (file_ns_capable(filp, &init_user_ns, CAP_SYS_ADMIN)) |
1da177e4 | 835 | size = dev->cfg_size; |
3c78bc61 | 836 | else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) |
1da177e4 | 837 | size = 128; |
1da177e4 LT |
838 | |
839 | if (off > size) | |
840 | return 0; | |
841 | if (off + count > size) { | |
842 | size -= off; | |
843 | count = size; | |
844 | } else { | |
845 | size = count; | |
846 | } | |
847 | ||
3d8387ef HY |
848 | pci_config_pm_runtime_get(dev); |
849 | ||
4c0619ad | 850 | if ((off & 1) && size) { |
851 | u8 val; | |
e04b0ea2 | 852 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 853 | data[off - init_off] = val; |
1da177e4 | 854 | off++; |
4c0619ad | 855 | size--; |
856 | } | |
857 | ||
858 | if ((off & 3) && size > 2) { | |
859 | u16 val; | |
e04b0ea2 | 860 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 861 | data[off - init_off] = val & 0xff; |
862 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
863 | off += 2; | |
864 | size -= 2; | |
1da177e4 LT |
865 | } |
866 | ||
867 | while (size > 3) { | |
4c0619ad | 868 | u32 val; |
e04b0ea2 | 869 | pci_user_read_config_dword(dev, off, &val); |
4c0619ad | 870 | data[off - init_off] = val & 0xff; |
871 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
872 | data[off - init_off + 2] = (val >> 16) & 0xff; | |
873 | data[off - init_off + 3] = (val >> 24) & 0xff; | |
1da177e4 LT |
874 | off += 4; |
875 | size -= 4; | |
876 | } | |
877 | ||
4c0619ad | 878 | if (size >= 2) { |
879 | u16 val; | |
e04b0ea2 | 880 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 881 | data[off - init_off] = val & 0xff; |
882 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
883 | off += 2; | |
884 | size -= 2; | |
885 | } | |
886 | ||
887 | if (size > 0) { | |
888 | u8 val; | |
e04b0ea2 | 889 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 890 | data[off - init_off] = val; |
1da177e4 LT |
891 | off++; |
892 | --size; | |
893 | } | |
894 | ||
3d8387ef HY |
895 | pci_config_pm_runtime_put(dev); |
896 | ||
1da177e4 LT |
897 | return count; |
898 | } | |
899 | ||
3c78bc61 RD |
900 | static ssize_t pci_write_config(struct file *filp, struct kobject *kobj, |
901 | struct bin_attribute *bin_attr, char *buf, | |
902 | loff_t off, size_t count) | |
1da177e4 | 903 | { |
554a6037 | 904 | struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj)); |
1da177e4 LT |
905 | unsigned int size = count; |
906 | loff_t init_off = off; | |
3c78bc61 | 907 | u8 *data = (u8 *) buf; |
1da177e4 LT |
908 | |
909 | if (off > dev->cfg_size) | |
910 | return 0; | |
911 | if (off + count > dev->cfg_size) { | |
912 | size = dev->cfg_size - off; | |
913 | count = size; | |
914 | } | |
f7625980 | 915 | |
3d8387ef HY |
916 | pci_config_pm_runtime_get(dev); |
917 | ||
4c0619ad | 918 | if ((off & 1) && size) { |
e04b0ea2 | 919 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 | 920 | off++; |
4c0619ad | 921 | size--; |
1da177e4 | 922 | } |
f7625980 | 923 | |
4c0619ad | 924 | if ((off & 3) && size > 2) { |
925 | u16 val = data[off - init_off]; | |
926 | val |= (u16) data[off - init_off + 1] << 8; | |
3c78bc61 RD |
927 | pci_user_write_config_word(dev, off, val); |
928 | off += 2; | |
929 | size -= 2; | |
930 | } | |
1da177e4 LT |
931 | |
932 | while (size > 3) { | |
4c0619ad | 933 | u32 val = data[off - init_off]; |
934 | val |= (u32) data[off - init_off + 1] << 8; | |
935 | val |= (u32) data[off - init_off + 2] << 16; | |
936 | val |= (u32) data[off - init_off + 3] << 24; | |
e04b0ea2 | 937 | pci_user_write_config_dword(dev, off, val); |
1da177e4 LT |
938 | off += 4; |
939 | size -= 4; | |
940 | } | |
f7625980 | 941 | |
4c0619ad | 942 | if (size >= 2) { |
943 | u16 val = data[off - init_off]; | |
944 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 945 | pci_user_write_config_word(dev, off, val); |
4c0619ad | 946 | off += 2; |
947 | size -= 2; | |
948 | } | |
1da177e4 | 949 | |
4c0619ad | 950 | if (size) { |
e04b0ea2 | 951 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 LT |
952 | off++; |
953 | --size; | |
954 | } | |
955 | ||
3d8387ef HY |
956 | pci_config_pm_runtime_put(dev); |
957 | ||
1da177e4 LT |
958 | return count; |
959 | } | |
960 | ||
961 | #ifdef HAVE_PCI_LEGACY | |
962 | /** | |
963 | * pci_read_legacy_io - read byte(s) from legacy I/O port space | |
2c3c8bea | 964 | * @filp: open sysfs file |
1da177e4 | 965 | * @kobj: kobject corresponding to file to read from |
cffb2faf | 966 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
967 | * @buf: buffer to store results |
968 | * @off: offset into legacy I/O port space | |
969 | * @count: number of bytes to read | |
970 | * | |
971 | * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
972 | * callback routine (pci_legacy_read). | |
973 | */ | |
3c78bc61 RD |
974 | static ssize_t pci_read_legacy_io(struct file *filp, struct kobject *kobj, |
975 | struct bin_attribute *bin_attr, char *buf, | |
976 | loff_t off, size_t count) | |
1da177e4 | 977 | { |
554a6037 | 978 | struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); |
1da177e4 | 979 | |
3c78bc61 RD |
980 | /* Only support 1, 2 or 4 byte accesses */ |
981 | if (count != 1 && count != 2 && count != 4) | |
982 | return -EINVAL; | |
1da177e4 | 983 | |
3c78bc61 | 984 | return pci_legacy_read(bus, off, (u32 *)buf, count); |
1da177e4 LT |
985 | } |
986 | ||
987 | /** | |
988 | * pci_write_legacy_io - write byte(s) to legacy I/O port space | |
2c3c8bea | 989 | * @filp: open sysfs file |
1da177e4 | 990 | * @kobj: kobject corresponding to file to read from |
cffb2faf | 991 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
992 | * @buf: buffer containing value to be written |
993 | * @off: offset into legacy I/O port space | |
994 | * @count: number of bytes to write | |
995 | * | |
996 | * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
997 | * callback routine (pci_legacy_write). | |
998 | */ | |
3c78bc61 RD |
999 | static ssize_t pci_write_legacy_io(struct file *filp, struct kobject *kobj, |
1000 | struct bin_attribute *bin_attr, char *buf, | |
1001 | loff_t off, size_t count) | |
1da177e4 | 1002 | { |
554a6037 | 1003 | struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); |
1da177e4 | 1004 | |
3c78bc61 RD |
1005 | /* Only support 1, 2 or 4 byte accesses */ |
1006 | if (count != 1 && count != 2 && count != 4) | |
1007 | return -EINVAL; | |
1008 | ||
1009 | return pci_legacy_write(bus, off, *(u32 *)buf, count); | |
1da177e4 LT |
1010 | } |
1011 | ||
1012 | /** | |
1013 | * pci_mmap_legacy_mem - map legacy PCI memory into user memory space | |
2c3c8bea | 1014 | * @filp: open sysfs file |
1da177e4 LT |
1015 | * @kobj: kobject corresponding to device to be mapped |
1016 | * @attr: struct bin_attribute for this file | |
1017 | * @vma: struct vm_area_struct passed to mmap | |
1018 | * | |
f19aeb1f | 1019 | * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap |
1da177e4 LT |
1020 | * legacy memory space (first meg of bus space) into application virtual |
1021 | * memory space. | |
1022 | */ | |
3c78bc61 RD |
1023 | static int pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj, |
1024 | struct bin_attribute *attr, | |
1025 | struct vm_area_struct *vma) | |
1da177e4 | 1026 | { |
554a6037 | 1027 | struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); |
1da177e4 | 1028 | |
3c78bc61 | 1029 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem); |
f19aeb1f BH |
1030 | } |
1031 | ||
1032 | /** | |
1033 | * pci_mmap_legacy_io - map legacy PCI IO into user memory space | |
2c3c8bea | 1034 | * @filp: open sysfs file |
f19aeb1f BH |
1035 | * @kobj: kobject corresponding to device to be mapped |
1036 | * @attr: struct bin_attribute for this file | |
1037 | * @vma: struct vm_area_struct passed to mmap | |
1038 | * | |
1039 | * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap | |
1040 | * legacy IO space (first meg of bus space) into application virtual | |
1041 | * memory space. Returns -ENOSYS if the operation isn't supported | |
1042 | */ | |
3c78bc61 RD |
1043 | static int pci_mmap_legacy_io(struct file *filp, struct kobject *kobj, |
1044 | struct bin_attribute *attr, | |
1045 | struct vm_area_struct *vma) | |
f19aeb1f | 1046 | { |
554a6037 | 1047 | struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); |
f19aeb1f | 1048 | |
3c78bc61 | 1049 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io); |
f19aeb1f BH |
1050 | } |
1051 | ||
10a0ef39 IK |
1052 | /** |
1053 | * pci_adjust_legacy_attr - adjustment of legacy file attributes | |
1054 | * @b: bus to create files under | |
1055 | * @mmap_type: I/O port or memory | |
1056 | * | |
1057 | * Stub implementation. Can be overridden by arch if necessary. | |
1058 | */ | |
3c78bc61 RD |
1059 | void __weak pci_adjust_legacy_attr(struct pci_bus *b, |
1060 | enum pci_mmap_state mmap_type) | |
10a0ef39 | 1061 | { |
10a0ef39 IK |
1062 | } |
1063 | ||
f19aeb1f BH |
1064 | /** |
1065 | * pci_create_legacy_files - create legacy I/O port and memory files | |
1066 | * @b: bus to create files under | |
1067 | * | |
1068 | * Some platforms allow access to legacy I/O port and ISA memory space on | |
1069 | * a per-bus basis. This routine creates the files and ties them into | |
1070 | * their associated read, write and mmap files from pci-sysfs.c | |
1071 | * | |
25985edc | 1072 | * On error unwind, but don't propagate the error to the caller |
f19aeb1f BH |
1073 | * as it is ok to set up the PCI bus without these files. |
1074 | */ | |
1075 | void pci_create_legacy_files(struct pci_bus *b) | |
1076 | { | |
1077 | int error; | |
1078 | ||
6396bb22 | 1079 | b->legacy_io = kcalloc(2, sizeof(struct bin_attribute), |
f19aeb1f BH |
1080 | GFP_ATOMIC); |
1081 | if (!b->legacy_io) | |
1082 | goto kzalloc_err; | |
1083 | ||
62e877b8 | 1084 | sysfs_bin_attr_init(b->legacy_io); |
f19aeb1f BH |
1085 | b->legacy_io->attr.name = "legacy_io"; |
1086 | b->legacy_io->size = 0xffff; | |
1087 | b->legacy_io->attr.mode = S_IRUSR | S_IWUSR; | |
1088 | b->legacy_io->read = pci_read_legacy_io; | |
1089 | b->legacy_io->write = pci_write_legacy_io; | |
1090 | b->legacy_io->mmap = pci_mmap_legacy_io; | |
10a0ef39 | 1091 | pci_adjust_legacy_attr(b, pci_mmap_io); |
f19aeb1f BH |
1092 | error = device_create_bin_file(&b->dev, b->legacy_io); |
1093 | if (error) | |
1094 | goto legacy_io_err; | |
1095 | ||
1096 | /* Allocated above after the legacy_io struct */ | |
1097 | b->legacy_mem = b->legacy_io + 1; | |
6757eca3 | 1098 | sysfs_bin_attr_init(b->legacy_mem); |
f19aeb1f BH |
1099 | b->legacy_mem->attr.name = "legacy_mem"; |
1100 | b->legacy_mem->size = 1024*1024; | |
1101 | b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR; | |
1102 | b->legacy_mem->mmap = pci_mmap_legacy_mem; | |
10a0ef39 | 1103 | pci_adjust_legacy_attr(b, pci_mmap_mem); |
f19aeb1f BH |
1104 | error = device_create_bin_file(&b->dev, b->legacy_mem); |
1105 | if (error) | |
1106 | goto legacy_mem_err; | |
1107 | ||
1108 | return; | |
1109 | ||
1110 | legacy_mem_err: | |
1111 | device_remove_bin_file(&b->dev, b->legacy_io); | |
1112 | legacy_io_err: | |
1113 | kfree(b->legacy_io); | |
1114 | b->legacy_io = NULL; | |
1115 | kzalloc_err: | |
227f0647 | 1116 | printk(KERN_WARNING "pci: warning: could not create legacy I/O port and ISA memory resources to sysfs\n"); |
f19aeb1f BH |
1117 | return; |
1118 | } | |
1119 | ||
1120 | void pci_remove_legacy_files(struct pci_bus *b) | |
1121 | { | |
1122 | if (b->legacy_io) { | |
1123 | device_remove_bin_file(&b->dev, b->legacy_io); | |
1124 | device_remove_bin_file(&b->dev, b->legacy_mem); | |
1125 | kfree(b->legacy_io); /* both are allocated here */ | |
1126 | } | |
1da177e4 LT |
1127 | } |
1128 | #endif /* HAVE_PCI_LEGACY */ | |
1129 | ||
f7195824 | 1130 | #if defined(HAVE_PCI_MMAP) || defined(ARCH_GENERIC_PCI_MMAP_RESOURCE) |
b5ff7df3 | 1131 | |
3b519e4e MW |
1132 | int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma, |
1133 | enum pci_mmap_api mmap_api) | |
b5ff7df3 | 1134 | { |
6bccc7f4 DW |
1135 | unsigned long nr, start, size; |
1136 | resource_size_t pci_start = 0, pci_end; | |
b5ff7df3 | 1137 | |
3b519e4e MW |
1138 | if (pci_resource_len(pdev, resno) == 0) |
1139 | return 0; | |
64b00175 | 1140 | nr = vma_pages(vma); |
b5ff7df3 | 1141 | start = vma->vm_pgoff; |
88e7df0b | 1142 | size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1; |
6bccc7f4 DW |
1143 | if (mmap_api == PCI_MMAP_PROCFS) { |
1144 | pci_resource_to_user(pdev, resno, &pdev->resource[resno], | |
1145 | &pci_start, &pci_end); | |
1146 | pci_start >>= PAGE_SHIFT; | |
1147 | } | |
3b519e4e MW |
1148 | if (start >= pci_start && start < pci_start + size && |
1149 | start + nr <= pci_start + size) | |
b5ff7df3 | 1150 | return 1; |
b5ff7df3 LT |
1151 | return 0; |
1152 | } | |
1153 | ||
1da177e4 LT |
1154 | /** |
1155 | * pci_mmap_resource - map a PCI resource into user memory space | |
1156 | * @kobj: kobject for mapping | |
1157 | * @attr: struct bin_attribute for the file being mapped | |
1158 | * @vma: struct vm_area_struct passed into the mmap | |
45aec1ae | 1159 | * @write_combine: 1 for write_combine mapping |
1da177e4 LT |
1160 | * |
1161 | * Use the regular PCI mapping routines to map a PCI resource into userspace. | |
1da177e4 | 1162 | */ |
3c78bc61 RD |
1163 | static int pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr, |
1164 | struct vm_area_struct *vma, int write_combine) | |
1da177e4 | 1165 | { |
554a6037 | 1166 | struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); |
dca40b18 | 1167 | int bar = (unsigned long)attr->private; |
1da177e4 | 1168 | enum pci_mmap_state mmap_type; |
dca40b18 | 1169 | struct resource *res = &pdev->resource[bar]; |
2311b1f2 | 1170 | |
ca620723 BH |
1171 | if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(res->start)) |
1172 | return -EINVAL; | |
1173 | ||
7a094909 | 1174 | if (!pci_mmap_fits(pdev, bar, vma, PCI_MMAP_SYSFS)) |
b5ff7df3 | 1175 | return -EINVAL; |
7a094909 | 1176 | |
1da177e4 | 1177 | mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io; |
f7195824 DW |
1178 | |
1179 | return pci_mmap_resource_range(pdev, bar, vma, mmap_type, write_combine); | |
45aec1ae | 1180 | } |
1181 | ||
3c78bc61 RD |
1182 | static int pci_mmap_resource_uc(struct file *filp, struct kobject *kobj, |
1183 | struct bin_attribute *attr, | |
1184 | struct vm_area_struct *vma) | |
45aec1ae | 1185 | { |
1186 | return pci_mmap_resource(kobj, attr, vma, 0); | |
1187 | } | |
1188 | ||
3c78bc61 RD |
1189 | static int pci_mmap_resource_wc(struct file *filp, struct kobject *kobj, |
1190 | struct bin_attribute *attr, | |
1191 | struct vm_area_struct *vma) | |
45aec1ae | 1192 | { |
1193 | return pci_mmap_resource(kobj, attr, vma, 1); | |
1da177e4 LT |
1194 | } |
1195 | ||
3c78bc61 RD |
1196 | static ssize_t pci_resource_io(struct file *filp, struct kobject *kobj, |
1197 | struct bin_attribute *attr, char *buf, | |
1198 | loff_t off, size_t count, bool write) | |
8633328b | 1199 | { |
554a6037 | 1200 | struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); |
dca40b18 | 1201 | int bar = (unsigned long)attr->private; |
8633328b | 1202 | unsigned long port = off; |
8633328b | 1203 | |
dca40b18 | 1204 | port += pci_resource_start(pdev, bar); |
8633328b | 1205 | |
dca40b18 | 1206 | if (port > pci_resource_end(pdev, bar)) |
8633328b AW |
1207 | return 0; |
1208 | ||
dca40b18 | 1209 | if (port + count - 1 > pci_resource_end(pdev, bar)) |
8633328b AW |
1210 | return -EINVAL; |
1211 | ||
1212 | switch (count) { | |
1213 | case 1: | |
1214 | if (write) | |
1215 | outb(*(u8 *)buf, port); | |
1216 | else | |
1217 | *(u8 *)buf = inb(port); | |
1218 | return 1; | |
1219 | case 2: | |
1220 | if (write) | |
1221 | outw(*(u16 *)buf, port); | |
1222 | else | |
1223 | *(u16 *)buf = inw(port); | |
1224 | return 2; | |
1225 | case 4: | |
1226 | if (write) | |
1227 | outl(*(u32 *)buf, port); | |
1228 | else | |
1229 | *(u32 *)buf = inl(port); | |
1230 | return 4; | |
1231 | } | |
1232 | return -EINVAL; | |
1233 | } | |
1234 | ||
3c78bc61 RD |
1235 | static ssize_t pci_read_resource_io(struct file *filp, struct kobject *kobj, |
1236 | struct bin_attribute *attr, char *buf, | |
1237 | loff_t off, size_t count) | |
8633328b AW |
1238 | { |
1239 | return pci_resource_io(filp, kobj, attr, buf, off, count, false); | |
1240 | } | |
1241 | ||
3c78bc61 RD |
1242 | static ssize_t pci_write_resource_io(struct file *filp, struct kobject *kobj, |
1243 | struct bin_attribute *attr, char *buf, | |
1244 | loff_t off, size_t count) | |
8633328b AW |
1245 | { |
1246 | return pci_resource_io(filp, kobj, attr, buf, off, count, true); | |
1247 | } | |
1248 | ||
b19441af GKH |
1249 | /** |
1250 | * pci_remove_resource_files - cleanup resource files | |
cffb2faf | 1251 | * @pdev: dev to cleanup |
b19441af | 1252 | * |
cffb2faf | 1253 | * If we created resource files for @pdev, remove them from sysfs and |
b19441af GKH |
1254 | * free their resources. |
1255 | */ | |
3c78bc61 | 1256 | static void pci_remove_resource_files(struct pci_dev *pdev) |
b19441af GKH |
1257 | { |
1258 | int i; | |
1259 | ||
1260 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
1261 | struct bin_attribute *res_attr; | |
1262 | ||
1263 | res_attr = pdev->res_attr[i]; | |
1264 | if (res_attr) { | |
1265 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
1266 | kfree(res_attr); | |
1267 | } | |
45aec1ae | 1268 | |
1269 | res_attr = pdev->res_attr_wc[i]; | |
1270 | if (res_attr) { | |
1271 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
1272 | kfree(res_attr); | |
1273 | } | |
b19441af GKH |
1274 | } |
1275 | } | |
1276 | ||
45aec1ae | 1277 | static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine) |
1278 | { | |
1279 | /* allocate attribute structure, piggyback attribute name */ | |
1280 | int name_len = write_combine ? 13 : 10; | |
1281 | struct bin_attribute *res_attr; | |
bd5174df | 1282 | char *res_attr_name; |
45aec1ae | 1283 | int retval; |
1284 | ||
1285 | res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC); | |
bd5174df BH |
1286 | if (!res_attr) |
1287 | return -ENOMEM; | |
1288 | ||
1289 | res_attr_name = (char *)(res_attr + 1); | |
1290 | ||
1291 | sysfs_bin_attr_init(res_attr); | |
1292 | if (write_combine) { | |
1293 | pdev->res_attr_wc[num] = res_attr; | |
1294 | sprintf(res_attr_name, "resource%d_wc", num); | |
1295 | res_attr->mmap = pci_mmap_resource_wc; | |
1296 | } else { | |
1297 | pdev->res_attr[num] = res_attr; | |
1298 | sprintf(res_attr_name, "resource%d", num); | |
e854d8b2 DW |
1299 | if (pci_resource_flags(pdev, num) & IORESOURCE_IO) { |
1300 | res_attr->read = pci_read_resource_io; | |
1301 | res_attr->write = pci_write_resource_io; | |
1302 | if (arch_can_pci_mmap_io()) | |
1303 | res_attr->mmap = pci_mmap_resource_uc; | |
1304 | } else { | |
1305 | res_attr->mmap = pci_mmap_resource_uc; | |
1306 | } | |
bd5174df BH |
1307 | } |
1308 | res_attr->attr.name = res_attr_name; | |
1309 | res_attr->attr.mode = S_IRUSR | S_IWUSR; | |
1310 | res_attr->size = pci_resource_len(pdev, num); | |
dca40b18 | 1311 | res_attr->private = (void *)(unsigned long)num; |
bd5174df BH |
1312 | retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr); |
1313 | if (retval) | |
1314 | kfree(res_attr); | |
45aec1ae | 1315 | |
1316 | return retval; | |
1317 | } | |
1318 | ||
1da177e4 LT |
1319 | /** |
1320 | * pci_create_resource_files - create resource files in sysfs for @dev | |
cffb2faf | 1321 | * @pdev: dev in question |
1da177e4 | 1322 | * |
cffb2faf | 1323 | * Walk the resources in @pdev creating files for each resource available. |
1da177e4 | 1324 | */ |
b19441af | 1325 | static int pci_create_resource_files(struct pci_dev *pdev) |
1da177e4 LT |
1326 | { |
1327 | int i; | |
b19441af | 1328 | int retval; |
1da177e4 LT |
1329 | |
1330 | /* Expose the PCI resources from this device as files */ | |
1331 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
1da177e4 LT |
1332 | |
1333 | /* skip empty resources */ | |
1334 | if (!pci_resource_len(pdev, i)) | |
1335 | continue; | |
1336 | ||
45aec1ae | 1337 | retval = pci_create_attr(pdev, i, 0); |
1338 | /* for prefetchable resources, create a WC mappable file */ | |
ae749c7a DW |
1339 | if (!retval && arch_can_pci_mmap_wc() && |
1340 | pdev->resource[i].flags & IORESOURCE_PREFETCH) | |
45aec1ae | 1341 | retval = pci_create_attr(pdev, i, 1); |
45aec1ae | 1342 | if (retval) { |
1343 | pci_remove_resource_files(pdev); | |
1344 | return retval; | |
1da177e4 LT |
1345 | } |
1346 | } | |
b19441af | 1347 | return 0; |
1da177e4 LT |
1348 | } |
1349 | #else /* !HAVE_PCI_MMAP */ | |
10a0ef39 IK |
1350 | int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; } |
1351 | void __weak pci_remove_resource_files(struct pci_dev *dev) { return; } | |
1da177e4 LT |
1352 | #endif /* HAVE_PCI_MMAP */ |
1353 | ||
1354 | /** | |
1355 | * pci_write_rom - used to enable access to the PCI ROM display | |
2c3c8bea | 1356 | * @filp: sysfs file |
1da177e4 | 1357 | * @kobj: kernel object handle |
cffb2faf | 1358 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
1359 | * @buf: user input |
1360 | * @off: file offset | |
1361 | * @count: number of byte in input | |
1362 | * | |
1363 | * writing anything except 0 enables it | |
1364 | */ | |
3c78bc61 RD |
1365 | static ssize_t pci_write_rom(struct file *filp, struct kobject *kobj, |
1366 | struct bin_attribute *bin_attr, char *buf, | |
1367 | loff_t off, size_t count) | |
1da177e4 | 1368 | { |
554a6037 | 1369 | struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); |
1da177e4 LT |
1370 | |
1371 | if ((off == 0) && (*buf == '0') && (count == 2)) | |
1372 | pdev->rom_attr_enabled = 0; | |
1373 | else | |
1374 | pdev->rom_attr_enabled = 1; | |
1375 | ||
1376 | return count; | |
1377 | } | |
1378 | ||
1379 | /** | |
1380 | * pci_read_rom - read a PCI ROM | |
2c3c8bea | 1381 | * @filp: sysfs file |
1da177e4 | 1382 | * @kobj: kernel object handle |
cffb2faf | 1383 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
1384 | * @buf: where to put the data we read from the ROM |
1385 | * @off: file offset | |
1386 | * @count: number of bytes to read | |
1387 | * | |
1388 | * Put @count bytes starting at @off into @buf from the ROM in the PCI | |
1389 | * device corresponding to @kobj. | |
1390 | */ | |
3c78bc61 RD |
1391 | static ssize_t pci_read_rom(struct file *filp, struct kobject *kobj, |
1392 | struct bin_attribute *bin_attr, char *buf, | |
1393 | loff_t off, size_t count) | |
1da177e4 | 1394 | { |
554a6037 | 1395 | struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); |
1da177e4 LT |
1396 | void __iomem *rom; |
1397 | size_t size; | |
1398 | ||
1399 | if (!pdev->rom_attr_enabled) | |
1400 | return -EINVAL; | |
f7625980 | 1401 | |
1da177e4 | 1402 | rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */ |
97c44836 TN |
1403 | if (!rom || !size) |
1404 | return -EIO; | |
f7625980 | 1405 | |
1da177e4 LT |
1406 | if (off >= size) |
1407 | count = 0; | |
1408 | else { | |
1409 | if (off + count > size) | |
1410 | count = size - off; | |
f7625980 | 1411 | |
1da177e4 LT |
1412 | memcpy_fromio(buf, rom + off, count); |
1413 | } | |
1414 | pci_unmap_rom(pdev, rom); | |
f7625980 | 1415 | |
1da177e4 LT |
1416 | return count; |
1417 | } | |
1418 | ||
8bdc50ac | 1419 | static const struct bin_attribute pci_config_attr = { |
1da177e4 LT |
1420 | .attr = { |
1421 | .name = "config", | |
1422 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 1423 | }, |
557848c3 | 1424 | .size = PCI_CFG_SPACE_SIZE, |
1da177e4 LT |
1425 | .read = pci_read_config, |
1426 | .write = pci_write_config, | |
1427 | }; | |
1428 | ||
8bdc50ac | 1429 | static const struct bin_attribute pcie_config_attr = { |
1da177e4 LT |
1430 | .attr = { |
1431 | .name = "config", | |
1432 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 1433 | }, |
557848c3 | 1434 | .size = PCI_CFG_SPACE_EXP_SIZE, |
1da177e4 LT |
1435 | .read = pci_read_config, |
1436 | .write = pci_write_config, | |
1437 | }; | |
1438 | ||
3c78bc61 RD |
1439 | static ssize_t reset_store(struct device *dev, struct device_attribute *attr, |
1440 | const char *buf, size_t count) | |
711d5779 MT |
1441 | { |
1442 | struct pci_dev *pdev = to_pci_dev(dev); | |
1443 | unsigned long val; | |
9a994e8e | 1444 | ssize_t result = kstrtoul(buf, 0, &val); |
711d5779 MT |
1445 | |
1446 | if (result < 0) | |
1447 | return result; | |
1448 | ||
1449 | if (val != 1) | |
1450 | return -EINVAL; | |
447c5dd7 MS |
1451 | |
1452 | result = pci_reset_function(pdev); | |
1453 | if (result < 0) | |
1454 | return result; | |
1455 | ||
1456 | return count; | |
711d5779 MT |
1457 | } |
1458 | ||
1459 | static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store); | |
1460 | ||
280c73d3 ZY |
1461 | static int pci_create_capabilities_sysfs(struct pci_dev *dev) |
1462 | { | |
1463 | int retval; | |
280c73d3 | 1464 | |
b1c615c4 | 1465 | pcie_vpd_create_sysfs_dev_files(dev); |
280c73d3 ZY |
1466 | pcie_aspm_create_sysfs_dev_files(dev); |
1467 | ||
5b0764ca | 1468 | if (dev->reset_fn) { |
711d5779 MT |
1469 | retval = device_create_file(&dev->dev, &reset_attr); |
1470 | if (retval) | |
1471 | goto error; | |
711d5779 | 1472 | } |
280c73d3 | 1473 | return 0; |
711d5779 MT |
1474 | |
1475 | error: | |
1476 | pcie_aspm_remove_sysfs_dev_files(dev); | |
b1c615c4 | 1477 | pcie_vpd_remove_sysfs_dev_files(dev); |
711d5779 | 1478 | return retval; |
280c73d3 ZY |
1479 | } |
1480 | ||
3c78bc61 | 1481 | int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev) |
1da177e4 | 1482 | { |
b19441af | 1483 | int retval; |
ac0c302a | 1484 | int rom_size; |
280c73d3 | 1485 | struct bin_attribute *attr; |
b19441af | 1486 | |
1da177e4 LT |
1487 | if (!sysfs_initialized) |
1488 | return -EACCES; | |
1489 | ||
c20aecf6 | 1490 | if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) |
b19441af | 1491 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
c20aecf6 JM |
1492 | else |
1493 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr); | |
b19441af GKH |
1494 | if (retval) |
1495 | goto err; | |
1da177e4 | 1496 | |
b19441af GKH |
1497 | retval = pci_create_resource_files(pdev); |
1498 | if (retval) | |
280c73d3 ZY |
1499 | goto err_config_file; |
1500 | ||
1da177e4 | 1501 | /* If the device has a ROM, try to expose it in sysfs. */ |
ac0c302a | 1502 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); |
280c73d3 | 1503 | if (rom_size) { |
94e61088 | 1504 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); |
280c73d3 | 1505 | if (!attr) { |
b19441af | 1506 | retval = -ENOMEM; |
9890b12a | 1507 | goto err_resource_files; |
1da177e4 | 1508 | } |
a07e4156 | 1509 | sysfs_bin_attr_init(attr); |
280c73d3 ZY |
1510 | attr->size = rom_size; |
1511 | attr->attr.name = "rom"; | |
ff29530e | 1512 | attr->attr.mode = S_IRUSR | S_IWUSR; |
280c73d3 ZY |
1513 | attr->read = pci_read_rom; |
1514 | attr->write = pci_write_rom; | |
1515 | retval = sysfs_create_bin_file(&pdev->dev.kobj, attr); | |
1516 | if (retval) { | |
1517 | kfree(attr); | |
1518 | goto err_resource_files; | |
1519 | } | |
1520 | pdev->rom_attr = attr; | |
1da177e4 | 1521 | } |
280c73d3 | 1522 | |
280c73d3 ZY |
1523 | /* add sysfs entries for various capabilities */ |
1524 | retval = pci_create_capabilities_sysfs(pdev); | |
1525 | if (retval) | |
625e1d59 | 1526 | goto err_rom_file; |
7d715a6c | 1527 | |
911e1c9b N |
1528 | pci_create_firmware_label_files(pdev); |
1529 | ||
1da177e4 | 1530 | return 0; |
b19441af | 1531 | |
a2cd52ca | 1532 | err_rom_file: |
9d88b93b | 1533 | if (pdev->rom_attr) { |
94e61088 | 1534 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); |
280c73d3 ZY |
1535 | kfree(pdev->rom_attr); |
1536 | pdev->rom_attr = NULL; | |
1537 | } | |
9890b12a ME |
1538 | err_resource_files: |
1539 | pci_remove_resource_files(pdev); | |
94e61088 | 1540 | err_config_file: |
c20aecf6 | 1541 | if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) |
b19441af | 1542 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
c20aecf6 JM |
1543 | else |
1544 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); | |
b19441af GKH |
1545 | err: |
1546 | return retval; | |
1da177e4 LT |
1547 | } |
1548 | ||
280c73d3 ZY |
1549 | static void pci_remove_capabilities_sysfs(struct pci_dev *dev) |
1550 | { | |
b1c615c4 | 1551 | pcie_vpd_remove_sysfs_dev_files(dev); |
280c73d3 | 1552 | pcie_aspm_remove_sysfs_dev_files(dev); |
711d5779 MT |
1553 | if (dev->reset_fn) { |
1554 | device_remove_file(&dev->dev, &reset_attr); | |
1555 | dev->reset_fn = 0; | |
1556 | } | |
280c73d3 ZY |
1557 | } |
1558 | ||
1da177e4 LT |
1559 | /** |
1560 | * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files | |
1561 | * @pdev: device whose entries we should free | |
1562 | * | |
1563 | * Cleanup when @pdev is removed from sysfs. | |
1564 | */ | |
1565 | void pci_remove_sysfs_dev_files(struct pci_dev *pdev) | |
1566 | { | |
d67afe5e DM |
1567 | if (!sysfs_initialized) |
1568 | return; | |
1569 | ||
280c73d3 | 1570 | pci_remove_capabilities_sysfs(pdev); |
7d715a6c | 1571 | |
c20aecf6 | 1572 | if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) |
1da177e4 | 1573 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
c20aecf6 JM |
1574 | else |
1575 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); | |
1da177e4 LT |
1576 | |
1577 | pci_remove_resource_files(pdev); | |
1578 | ||
9d88b93b | 1579 | if (pdev->rom_attr) { |
280c73d3 ZY |
1580 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); |
1581 | kfree(pdev->rom_attr); | |
9d88b93b | 1582 | pdev->rom_attr = NULL; |
1da177e4 | 1583 | } |
911e1c9b N |
1584 | |
1585 | pci_remove_firmware_label_files(pdev); | |
1da177e4 LT |
1586 | } |
1587 | ||
1588 | static int __init pci_sysfs_init(void) | |
1589 | { | |
1590 | struct pci_dev *pdev = NULL; | |
b19441af GKH |
1591 | int retval; |
1592 | ||
1da177e4 | 1593 | sysfs_initialized = 1; |
b19441af GKH |
1594 | for_each_pci_dev(pdev) { |
1595 | retval = pci_create_sysfs_dev_files(pdev); | |
151fc5df JL |
1596 | if (retval) { |
1597 | pci_dev_put(pdev); | |
b19441af | 1598 | return retval; |
151fc5df | 1599 | } |
b19441af | 1600 | } |
1da177e4 LT |
1601 | |
1602 | return 0; | |
1603 | } | |
40ee9e9f | 1604 | late_initcall(pci_sysfs_init); |
4e15c46b YL |
1605 | |
1606 | static struct attribute *pci_dev_dev_attrs[] = { | |
625e1d59 | 1607 | &vga_attr.attr, |
4e15c46b YL |
1608 | NULL, |
1609 | }; | |
1610 | ||
1611 | static umode_t pci_dev_attrs_are_visible(struct kobject *kobj, | |
3c78bc61 | 1612 | struct attribute *a, int n) |
4e15c46b | 1613 | { |
554a6037 | 1614 | struct device *dev = kobj_to_dev(kobj); |
625e1d59 YL |
1615 | struct pci_dev *pdev = to_pci_dev(dev); |
1616 | ||
1617 | if (a == &vga_attr.attr) | |
1618 | if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
1619 | return 0; | |
1620 | ||
4e15c46b YL |
1621 | return a->mode; |
1622 | } | |
1623 | ||
dfab88be JL |
1624 | static struct attribute *pci_dev_hp_attrs[] = { |
1625 | &dev_remove_attr.attr, | |
1626 | &dev_rescan_attr.attr, | |
1627 | NULL, | |
1628 | }; | |
1629 | ||
1630 | static umode_t pci_dev_hp_attrs_are_visible(struct kobject *kobj, | |
3c78bc61 | 1631 | struct attribute *a, int n) |
dfab88be | 1632 | { |
554a6037 | 1633 | struct device *dev = kobj_to_dev(kobj); |
dfab88be JL |
1634 | struct pci_dev *pdev = to_pci_dev(dev); |
1635 | ||
1636 | if (pdev->is_virtfn) | |
1637 | return 0; | |
1638 | ||
1639 | return a->mode; | |
1640 | } | |
1641 | ||
56c1af46 WVK |
1642 | static umode_t pci_bridge_attrs_are_visible(struct kobject *kobj, |
1643 | struct attribute *a, int n) | |
1644 | { | |
1645 | struct device *dev = kobj_to_dev(kobj); | |
1646 | struct pci_dev *pdev = to_pci_dev(dev); | |
1647 | ||
1648 | if (pci_is_bridge(pdev)) | |
1649 | return a->mode; | |
1650 | ||
1651 | return 0; | |
1652 | } | |
1653 | ||
1654 | static umode_t pcie_dev_attrs_are_visible(struct kobject *kobj, | |
1655 | struct attribute *a, int n) | |
1656 | { | |
1657 | struct device *dev = kobj_to_dev(kobj); | |
1658 | struct pci_dev *pdev = to_pci_dev(dev); | |
1659 | ||
1660 | if (pci_is_pcie(pdev)) | |
1661 | return a->mode; | |
1662 | ||
1663 | return 0; | |
1664 | } | |
1665 | ||
1666 | static const struct attribute_group pci_dev_group = { | |
1667 | .attrs = pci_dev_attrs, | |
1668 | }; | |
1669 | ||
1670 | const struct attribute_group *pci_dev_groups[] = { | |
1671 | &pci_dev_group, | |
1672 | NULL, | |
1673 | }; | |
1674 | ||
1675 | static const struct attribute_group pci_bridge_group = { | |
1676 | .attrs = pci_bridge_attrs, | |
1677 | }; | |
1678 | ||
1679 | const struct attribute_group *pci_bridge_groups[] = { | |
1680 | &pci_bridge_group, | |
1681 | NULL, | |
1682 | }; | |
1683 | ||
1684 | static const struct attribute_group pcie_dev_group = { | |
1685 | .attrs = pcie_dev_attrs, | |
1686 | }; | |
1687 | ||
1688 | const struct attribute_group *pcie_dev_groups[] = { | |
1689 | &pcie_dev_group, | |
1690 | NULL, | |
1691 | }; | |
1692 | ||
e7ea9825 | 1693 | static const struct attribute_group pci_dev_hp_attr_group = { |
dfab88be JL |
1694 | .attrs = pci_dev_hp_attrs, |
1695 | .is_visible = pci_dev_hp_attrs_are_visible, | |
1696 | }; | |
1697 | ||
1789382a DD |
1698 | #ifdef CONFIG_PCI_IOV |
1699 | static struct attribute *sriov_dev_attrs[] = { | |
1700 | &sriov_totalvfs_attr.attr, | |
1701 | &sriov_numvfs_attr.attr, | |
7dfca152 FS |
1702 | &sriov_offset_attr.attr, |
1703 | &sriov_stride_attr.attr, | |
1704 | &sriov_vf_device_attr.attr, | |
0e7df224 | 1705 | &sriov_drivers_autoprobe_attr.attr, |
1789382a DD |
1706 | NULL, |
1707 | }; | |
1708 | ||
1709 | static umode_t sriov_attrs_are_visible(struct kobject *kobj, | |
3c78bc61 | 1710 | struct attribute *a, int n) |
1789382a | 1711 | { |
554a6037 | 1712 | struct device *dev = kobj_to_dev(kobj); |
1789382a DD |
1713 | |
1714 | if (!dev_is_pf(dev)) | |
1715 | return 0; | |
1716 | ||
1717 | return a->mode; | |
1718 | } | |
1719 | ||
e7ea9825 | 1720 | static const struct attribute_group sriov_dev_attr_group = { |
1789382a DD |
1721 | .attrs = sriov_dev_attrs, |
1722 | .is_visible = sriov_attrs_are_visible, | |
1723 | }; | |
1724 | #endif /* CONFIG_PCI_IOV */ | |
1725 | ||
e7ea9825 | 1726 | static const struct attribute_group pci_dev_attr_group = { |
4e15c46b YL |
1727 | .attrs = pci_dev_dev_attrs, |
1728 | .is_visible = pci_dev_attrs_are_visible, | |
1729 | }; | |
1730 | ||
e7ea9825 | 1731 | static const struct attribute_group pci_bridge_attr_group = { |
56c1af46 WVK |
1732 | .attrs = pci_bridge_attrs, |
1733 | .is_visible = pci_bridge_attrs_are_visible, | |
1734 | }; | |
1735 | ||
e7ea9825 | 1736 | static const struct attribute_group pcie_dev_attr_group = { |
56c1af46 WVK |
1737 | .attrs = pcie_dev_attrs, |
1738 | .is_visible = pcie_dev_attrs_are_visible, | |
1739 | }; | |
1740 | ||
4e15c46b YL |
1741 | static const struct attribute_group *pci_dev_attr_groups[] = { |
1742 | &pci_dev_attr_group, | |
dfab88be | 1743 | &pci_dev_hp_attr_group, |
1789382a DD |
1744 | #ifdef CONFIG_PCI_IOV |
1745 | &sriov_dev_attr_group, | |
1746 | #endif | |
56c1af46 WVK |
1747 | &pci_bridge_attr_group, |
1748 | &pcie_dev_attr_group, | |
81aa5206 RJ |
1749 | #ifdef CONFIG_PCIEAER |
1750 | &aer_stats_attr_group, | |
1751 | #endif | |
4e15c46b YL |
1752 | NULL, |
1753 | }; | |
1754 | ||
69f2dc24 | 1755 | const struct device_type pci_dev_type = { |
4e15c46b YL |
1756 | .groups = pci_dev_attr_groups, |
1757 | }; |