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> |
5a0e3ad6 | 26 | #include <linux/slab.h> |
1a39b310 | 27 | #include <linux/vgaarb.h> |
448bd857 | 28 | #include <linux/pm_runtime.h> |
dfc73e7a | 29 | #include <linux/of.h> |
1da177e4 LT |
30 | #include "pci.h" |
31 | ||
32 | static int sysfs_initialized; /* = 0 */ | |
33 | ||
34 | /* show configuration fields */ | |
35 | #define pci_config_attr(field, format_string) \ | |
36 | static ssize_t \ | |
e404e274 | 37 | field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
38 | { \ |
39 | struct pci_dev *pdev; \ | |
40 | \ | |
3c78bc61 RD |
41 | pdev = to_pci_dev(dev); \ |
42 | return sprintf(buf, format_string, pdev->field); \ | |
5136b2da GKH |
43 | } \ |
44 | static DEVICE_ATTR_RO(field) | |
1da177e4 LT |
45 | |
46 | pci_config_attr(vendor, "0x%04x\n"); | |
47 | pci_config_attr(device, "0x%04x\n"); | |
48 | pci_config_attr(subsystem_vendor, "0x%04x\n"); | |
49 | pci_config_attr(subsystem_device, "0x%04x\n"); | |
702ed3be | 50 | pci_config_attr(revision, "0x%02x\n"); |
1da177e4 LT |
51 | pci_config_attr(class, "0x%06x\n"); |
52 | pci_config_attr(irq, "%u\n"); | |
53 | ||
bdee9d98 DT |
54 | static ssize_t broken_parity_status_show(struct device *dev, |
55 | struct device_attribute *attr, | |
56 | char *buf) | |
57 | { | |
58 | struct pci_dev *pdev = to_pci_dev(dev); | |
3c78bc61 | 59 | return sprintf(buf, "%u\n", pdev->broken_parity_status); |
bdee9d98 DT |
60 | } |
61 | ||
62 | static ssize_t broken_parity_status_store(struct device *dev, | |
63 | struct device_attribute *attr, | |
64 | const char *buf, size_t count) | |
65 | { | |
66 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 | 67 | unsigned long val; |
bdee9d98 | 68 | |
9a994e8e | 69 | if (kstrtoul(buf, 0, &val) < 0) |
92425a40 TP |
70 | return -EINVAL; |
71 | ||
72 | pdev->broken_parity_status = !!val; | |
73 | ||
74 | return count; | |
bdee9d98 | 75 | } |
5136b2da | 76 | static DEVICE_ATTR_RW(broken_parity_status); |
bdee9d98 | 77 | |
5aaba363 | 78 | static ssize_t pci_dev_show_local_cpu(struct device *dev, bool list, |
3c78bc61 | 79 | struct device_attribute *attr, char *buf) |
c489f5fb | 80 | { |
3be83050 | 81 | const struct cpumask *mask; |
4327edf6 | 82 | |
e0cd5160 | 83 | #ifdef CONFIG_NUMA |
6be954d1 DJ |
84 | mask = (dev_to_node(dev) == -1) ? cpu_online_mask : |
85 | cpumask_of_node(dev_to_node(dev)); | |
e0cd5160 | 86 | #else |
3be83050 | 87 | mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); |
e0cd5160 | 88 | #endif |
5aaba363 | 89 | return cpumap_print_to_pagebuf(list, buf, mask); |
39106dcf MT |
90 | } |
91 | ||
c489f5fb | 92 | static ssize_t local_cpus_show(struct device *dev, |
3c78bc61 | 93 | struct device_attribute *attr, char *buf) |
c489f5fb | 94 | { |
5aaba363 | 95 | return pci_dev_show_local_cpu(dev, false, attr, buf); |
c489f5fb | 96 | } |
5136b2da | 97 | static DEVICE_ATTR_RO(local_cpus); |
39106dcf MT |
98 | |
99 | static ssize_t local_cpulist_show(struct device *dev, | |
3c78bc61 | 100 | struct device_attribute *attr, char *buf) |
39106dcf | 101 | { |
5aaba363 | 102 | return pci_dev_show_local_cpu(dev, true, attr, buf); |
1da177e4 | 103 | } |
5136b2da | 104 | static DEVICE_ATTR_RO(local_cpulist); |
1da177e4 | 105 | |
dc2c2c9d YL |
106 | /* |
107 | * PCI Bus Class Devices | |
108 | */ | |
56039e65 GKH |
109 | static ssize_t cpuaffinity_show(struct device *dev, |
110 | struct device_attribute *attr, char *buf) | |
dc2c2c9d | 111 | { |
5aaba363 SH |
112 | const struct cpumask *cpumask = cpumask_of_pcibus(to_pci_bus(dev)); |
113 | ||
114 | return cpumap_print_to_pagebuf(false, buf, cpumask); | |
dc2c2c9d | 115 | } |
56039e65 | 116 | static DEVICE_ATTR_RO(cpuaffinity); |
dc2c2c9d | 117 | |
56039e65 GKH |
118 | static ssize_t cpulistaffinity_show(struct device *dev, |
119 | struct device_attribute *attr, char *buf) | |
dc2c2c9d | 120 | { |
5aaba363 SH |
121 | const struct cpumask *cpumask = cpumask_of_pcibus(to_pci_bus(dev)); |
122 | ||
123 | return cpumap_print_to_pagebuf(true, buf, cpumask); | |
dc2c2c9d | 124 | } |
56039e65 | 125 | static DEVICE_ATTR_RO(cpulistaffinity); |
dc2c2c9d | 126 | |
1da177e4 | 127 | /* show resources */ |
3c78bc61 RD |
128 | static ssize_t resource_show(struct device *dev, struct device_attribute *attr, |
129 | char *buf) | |
1da177e4 | 130 | { |
3c78bc61 RD |
131 | struct pci_dev *pci_dev = to_pci_dev(dev); |
132 | char *str = buf; | |
1da177e4 | 133 | int i; |
fde09c6d | 134 | int max; |
e31dd6e4 | 135 | resource_size_t start, end; |
1da177e4 LT |
136 | |
137 | if (pci_dev->subordinate) | |
138 | max = DEVICE_COUNT_RESOURCE; | |
fde09c6d YZ |
139 | else |
140 | max = PCI_BRIDGE_RESOURCES; | |
1da177e4 LT |
141 | |
142 | for (i = 0; i < max; i++) { | |
2311b1f2 ME |
143 | struct resource *res = &pci_dev->resource[i]; |
144 | pci_resource_to_user(pci_dev, i, res, &start, &end); | |
3c78bc61 | 145 | str += sprintf(str, "0x%016llx 0x%016llx 0x%016llx\n", |
2311b1f2 ME |
146 | (unsigned long long)start, |
147 | (unsigned long long)end, | |
148 | (unsigned long long)res->flags); | |
1da177e4 LT |
149 | } |
150 | return (str - buf); | |
151 | } | |
5136b2da | 152 | static DEVICE_ATTR_RO(resource); |
1da177e4 | 153 | |
56c1af46 WVK |
154 | static ssize_t max_link_speed_show(struct device *dev, |
155 | struct device_attribute *attr, char *buf) | |
156 | { | |
6cf57be0 | 157 | struct pci_dev *pdev = to_pci_dev(dev); |
56c1af46 | 158 | |
6cf57be0 | 159 | return sprintf(buf, "%s\n", PCIE_SPEED2STR(pcie_get_speed_cap(pdev))); |
56c1af46 WVK |
160 | } |
161 | static DEVICE_ATTR_RO(max_link_speed); | |
162 | ||
163 | static ssize_t max_link_width_show(struct device *dev, | |
164 | struct device_attribute *attr, char *buf) | |
165 | { | |
c70b65fb | 166 | struct pci_dev *pdev = to_pci_dev(dev); |
56c1af46 | 167 | |
c70b65fb | 168 | return sprintf(buf, "%u\n", pcie_get_width_cap(pdev)); |
56c1af46 WVK |
169 | } |
170 | static DEVICE_ATTR_RO(max_link_width); | |
171 | ||
172 | static ssize_t current_link_speed_show(struct device *dev, | |
173 | struct device_attribute *attr, char *buf) | |
174 | { | |
175 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
176 | u16 linkstat; | |
177 | int err; | |
178 | const char *speed; | |
179 | ||
180 | err = pcie_capability_read_word(pci_dev, PCI_EXP_LNKSTA, &linkstat); | |
181 | if (err) | |
182 | return -EINVAL; | |
183 | ||
184 | switch (linkstat & PCI_EXP_LNKSTA_CLS) { | |
1acfb9b7 JF |
185 | case PCI_EXP_LNKSTA_CLS_16_0GB: |
186 | speed = "16 GT/s"; | |
187 | break; | |
56c1af46 WVK |
188 | case PCI_EXP_LNKSTA_CLS_8_0GB: |
189 | speed = "8 GT/s"; | |
190 | break; | |
191 | case PCI_EXP_LNKSTA_CLS_5_0GB: | |
192 | speed = "5 GT/s"; | |
193 | break; | |
194 | case PCI_EXP_LNKSTA_CLS_2_5GB: | |
195 | speed = "2.5 GT/s"; | |
196 | break; | |
197 | default: | |
198 | speed = "Unknown speed"; | |
199 | } | |
200 | ||
201 | return sprintf(buf, "%s\n", speed); | |
202 | } | |
203 | static DEVICE_ATTR_RO(current_link_speed); | |
204 | ||
205 | static ssize_t current_link_width_show(struct device *dev, | |
206 | struct device_attribute *attr, char *buf) | |
207 | { | |
208 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
209 | u16 linkstat; | |
210 | int err; | |
211 | ||
212 | err = pcie_capability_read_word(pci_dev, PCI_EXP_LNKSTA, &linkstat); | |
213 | if (err) | |
214 | return -EINVAL; | |
215 | ||
216 | return sprintf(buf, "%u\n", | |
217 | (linkstat & PCI_EXP_LNKSTA_NLW) >> PCI_EXP_LNKSTA_NLW_SHIFT); | |
218 | } | |
219 | static DEVICE_ATTR_RO(current_link_width); | |
220 | ||
221 | static ssize_t secondary_bus_number_show(struct device *dev, | |
222 | struct device_attribute *attr, | |
223 | char *buf) | |
224 | { | |
225 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
226 | u8 sec_bus; | |
227 | int err; | |
228 | ||
229 | err = pci_read_config_byte(pci_dev, PCI_SECONDARY_BUS, &sec_bus); | |
230 | if (err) | |
231 | return -EINVAL; | |
232 | ||
233 | return sprintf(buf, "%u\n", sec_bus); | |
234 | } | |
235 | static DEVICE_ATTR_RO(secondary_bus_number); | |
236 | ||
237 | static ssize_t subordinate_bus_number_show(struct device *dev, | |
238 | struct device_attribute *attr, | |
239 | char *buf) | |
240 | { | |
241 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
242 | u8 sub_bus; | |
243 | int err; | |
244 | ||
245 | err = pci_read_config_byte(pci_dev, PCI_SUBORDINATE_BUS, &sub_bus); | |
246 | if (err) | |
247 | return -EINVAL; | |
248 | ||
249 | return sprintf(buf, "%u\n", sub_bus); | |
250 | } | |
251 | static DEVICE_ATTR_RO(subordinate_bus_number); | |
252 | ||
0077a845 SH |
253 | static ssize_t ari_enabled_show(struct device *dev, |
254 | struct device_attribute *attr, | |
255 | char *buf) | |
256 | { | |
257 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
258 | ||
259 | return sprintf(buf, "%u\n", pci_ari_enabled(pci_dev->bus)); | |
260 | } | |
261 | static DEVICE_ATTR_RO(ari_enabled); | |
262 | ||
3c78bc61 RD |
263 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, |
264 | char *buf) | |
9888549e GK |
265 | { |
266 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
267 | ||
89ec3dcf | 268 | return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02X\n", |
9888549e GK |
269 | pci_dev->vendor, pci_dev->device, |
270 | pci_dev->subsystem_vendor, pci_dev->subsystem_device, | |
271 | (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8), | |
272 | (u8)(pci_dev->class)); | |
273 | } | |
5136b2da | 274 | static DEVICE_ATTR_RO(modalias); |
bae94d02 | 275 | |
d8e7d53a | 276 | static ssize_t enable_store(struct device *dev, struct device_attribute *attr, |
3c78bc61 | 277 | const char *buf, size_t count) |
9f125d30 AV |
278 | { |
279 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 | 280 | unsigned long val; |
9a994e8e | 281 | ssize_t result = kstrtoul(buf, 0, &val); |
92425a40 TP |
282 | |
283 | if (result < 0) | |
284 | return result; | |
9f125d30 AV |
285 | |
286 | /* this can crash the machine when done on the "wrong" device */ | |
287 | if (!capable(CAP_SYS_ADMIN)) | |
92425a40 | 288 | return -EPERM; |
9f125d30 | 289 | |
6f5cdfa8 CH |
290 | device_lock(dev); |
291 | if (dev->driver) | |
292 | result = -EBUSY; | |
293 | else if (val) | |
bae94d02 | 294 | result = pci_enable_device(pdev); |
6f5cdfa8 CH |
295 | else if (pci_is_enabled(pdev)) |
296 | pci_disable_device(pdev); | |
297 | else | |
298 | result = -EIO; | |
299 | device_unlock(dev); | |
9f125d30 | 300 | |
bae94d02 IPG |
301 | return result < 0 ? result : count; |
302 | } | |
303 | ||
d8e7d53a | 304 | static ssize_t enable_show(struct device *dev, struct device_attribute *attr, |
3c78bc61 | 305 | char *buf) |
bae94d02 IPG |
306 | { |
307 | struct pci_dev *pdev; | |
9f125d30 | 308 | |
3c78bc61 RD |
309 | pdev = to_pci_dev(dev); |
310 | return sprintf(buf, "%u\n", atomic_read(&pdev->enable_cnt)); | |
9f125d30 | 311 | } |
d8e7d53a | 312 | static DEVICE_ATTR_RW(enable); |
9f125d30 | 313 | |
81bb0e19 | 314 | #ifdef CONFIG_NUMA |
63692df1 PB |
315 | static ssize_t numa_node_store(struct device *dev, |
316 | struct device_attribute *attr, const char *buf, | |
317 | size_t count) | |
318 | { | |
319 | struct pci_dev *pdev = to_pci_dev(dev); | |
320 | int node, ret; | |
321 | ||
322 | if (!capable(CAP_SYS_ADMIN)) | |
323 | return -EPERM; | |
324 | ||
325 | ret = kstrtoint(buf, 0, &node); | |
326 | if (ret) | |
327 | return ret; | |
328 | ||
3dcc8d39 MK |
329 | if ((node < 0 && node != NUMA_NO_NODE) || node >= MAX_NUMNODES) |
330 | return -EINVAL; | |
331 | ||
332 | if (node != NUMA_NO_NODE && !node_online(node)) | |
63692df1 PB |
333 | return -EINVAL; |
334 | ||
335 | add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK); | |
7506dc79 | 336 | pci_alert(pdev, FW_BUG "Overriding NUMA node to %d. Contact your vendor for updates.", |
63692df1 PB |
337 | node); |
338 | ||
339 | dev->numa_node = node; | |
340 | return count; | |
341 | } | |
342 | ||
3c78bc61 RD |
343 | static ssize_t numa_node_show(struct device *dev, struct device_attribute *attr, |
344 | char *buf) | |
81bb0e19 | 345 | { |
3c78bc61 | 346 | return sprintf(buf, "%d\n", dev->numa_node); |
81bb0e19 | 347 | } |
63692df1 | 348 | static DEVICE_ATTR_RW(numa_node); |
81bb0e19 BG |
349 | #endif |
350 | ||
3c78bc61 RD |
351 | static ssize_t dma_mask_bits_show(struct device *dev, |
352 | struct device_attribute *attr, char *buf) | |
bb965401 YL |
353 | { |
354 | struct pci_dev *pdev = to_pci_dev(dev); | |
355 | ||
3c78bc61 | 356 | return sprintf(buf, "%d\n", fls64(pdev->dma_mask)); |
bb965401 | 357 | } |
5136b2da | 358 | static DEVICE_ATTR_RO(dma_mask_bits); |
bb965401 | 359 | |
3c78bc61 RD |
360 | static ssize_t consistent_dma_mask_bits_show(struct device *dev, |
361 | struct device_attribute *attr, | |
362 | char *buf) | |
bb965401 | 363 | { |
3c78bc61 | 364 | return sprintf(buf, "%d\n", fls64(dev->coherent_dma_mask)); |
bb965401 | 365 | } |
5136b2da | 366 | static DEVICE_ATTR_RO(consistent_dma_mask_bits); |
bb965401 | 367 | |
3c78bc61 RD |
368 | static ssize_t msi_bus_show(struct device *dev, struct device_attribute *attr, |
369 | char *buf) | |
fe97064c BG |
370 | { |
371 | struct pci_dev *pdev = to_pci_dev(dev); | |
468ff15a | 372 | struct pci_bus *subordinate = pdev->subordinate; |
fe97064c | 373 | |
468ff15a YW |
374 | return sprintf(buf, "%u\n", subordinate ? |
375 | !(subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) | |
376 | : !pdev->no_msi); | |
fe97064c BG |
377 | } |
378 | ||
3c78bc61 RD |
379 | static ssize_t msi_bus_store(struct device *dev, struct device_attribute *attr, |
380 | const char *buf, size_t count) | |
fe97064c BG |
381 | { |
382 | struct pci_dev *pdev = to_pci_dev(dev); | |
468ff15a | 383 | struct pci_bus *subordinate = pdev->subordinate; |
92425a40 TP |
384 | unsigned long val; |
385 | ||
9a994e8e | 386 | if (kstrtoul(buf, 0, &val) < 0) |
92425a40 | 387 | return -EINVAL; |
fe97064c | 388 | |
fe97064c | 389 | if (!capable(CAP_SYS_ADMIN)) |
92425a40 | 390 | return -EPERM; |
fe97064c | 391 | |
f7625980 | 392 | /* |
468ff15a YW |
393 | * "no_msi" and "bus_flags" only affect what happens when a driver |
394 | * requests MSI or MSI-X. They don't affect any drivers that have | |
395 | * already requested MSI or MSI-X. | |
f7625980 | 396 | */ |
468ff15a YW |
397 | if (!subordinate) { |
398 | pdev->no_msi = !val; | |
7506dc79 | 399 | pci_info(pdev, "MSI/MSI-X %s for future drivers\n", |
468ff15a | 400 | val ? "allowed" : "disallowed"); |
fe97064c | 401 | return count; |
fe97064c BG |
402 | } |
403 | ||
468ff15a YW |
404 | if (val) |
405 | subordinate->bus_flags &= ~PCI_BUS_FLAGS_NO_MSI; | |
406 | else | |
407 | subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI; | |
408 | ||
409 | dev_info(&subordinate->dev, "MSI/MSI-X %s for future drivers of devices on this bus\n", | |
410 | val ? "allowed" : "disallowed"); | |
fe97064c BG |
411 | return count; |
412 | } | |
5136b2da | 413 | static DEVICE_ATTR_RW(msi_bus); |
9888549e | 414 | |
1094f6d0 | 415 | static ssize_t rescan_store(struct bus_type *bus, const char *buf, size_t count) |
705b1aaa AC |
416 | { |
417 | unsigned long val; | |
418 | struct pci_bus *b = NULL; | |
419 | ||
9a994e8e | 420 | if (kstrtoul(buf, 0, &val) < 0) |
705b1aaa AC |
421 | return -EINVAL; |
422 | ||
423 | if (val) { | |
9d16947b | 424 | pci_lock_rescan_remove(); |
705b1aaa AC |
425 | while ((b = pci_find_next_bus(b)) != NULL) |
426 | pci_rescan_bus(b); | |
9d16947b | 427 | pci_unlock_rescan_remove(); |
705b1aaa AC |
428 | } |
429 | return count; | |
430 | } | |
1094f6d0 | 431 | static BUS_ATTR_WO(rescan); |
705b1aaa | 432 | |
bf22c90f | 433 | static struct attribute *pci_bus_attrs[] = { |
0f49ba55 GKH |
434 | &bus_attr_rescan.attr, |
435 | NULL, | |
436 | }; | |
437 | ||
438 | static const struct attribute_group pci_bus_group = { | |
439 | .attrs = pci_bus_attrs, | |
440 | }; | |
441 | ||
442 | const struct attribute_group *pci_bus_groups[] = { | |
443 | &pci_bus_group, | |
444 | NULL, | |
705b1aaa | 445 | }; |
77c27c7b | 446 | |
3c78bc61 RD |
447 | static ssize_t dev_rescan_store(struct device *dev, |
448 | struct device_attribute *attr, const char *buf, | |
449 | size_t count) | |
738a6396 AC |
450 | { |
451 | unsigned long val; | |
452 | struct pci_dev *pdev = to_pci_dev(dev); | |
453 | ||
9a994e8e | 454 | if (kstrtoul(buf, 0, &val) < 0) |
738a6396 AC |
455 | return -EINVAL; |
456 | ||
457 | if (val) { | |
9d16947b | 458 | pci_lock_rescan_remove(); |
738a6396 | 459 | pci_rescan_bus(pdev->bus); |
9d16947b | 460 | pci_unlock_rescan_remove(); |
738a6396 AC |
461 | } |
462 | return count; | |
463 | } | |
bf22c90f SK |
464 | static struct device_attribute dev_rescan_attr = __ATTR(rescan, |
465 | (S_IWUSR|S_IWGRP), | |
466 | NULL, dev_rescan_store); | |
738a6396 | 467 | |
3c78bc61 RD |
468 | static ssize_t remove_store(struct device *dev, struct device_attribute *attr, |
469 | const char *buf, size_t count) | |
77c27c7b | 470 | { |
77c27c7b | 471 | unsigned long val; |
77c27c7b | 472 | |
9a994e8e | 473 | if (kstrtoul(buf, 0, &val) < 0) |
77c27c7b AC |
474 | return -EINVAL; |
475 | ||
bc6caf02 TH |
476 | if (val && device_remove_file_self(dev, attr)) |
477 | pci_stop_and_remove_bus_device_locked(to_pci_dev(dev)); | |
77c27c7b AC |
478 | return count; |
479 | } | |
bf22c90f SK |
480 | static struct device_attribute dev_remove_attr = __ATTR(remove, |
481 | (S_IWUSR|S_IWGRP), | |
482 | NULL, remove_store); | |
b9d320fc | 483 | |
3c78bc61 RD |
484 | static ssize_t dev_bus_rescan_store(struct device *dev, |
485 | struct device_attribute *attr, | |
486 | const char *buf, size_t count) | |
b9d320fc YL |
487 | { |
488 | unsigned long val; | |
489 | struct pci_bus *bus = to_pci_bus(dev); | |
490 | ||
9a994e8e | 491 | if (kstrtoul(buf, 0, &val) < 0) |
b9d320fc YL |
492 | return -EINVAL; |
493 | ||
494 | if (val) { | |
9d16947b | 495 | pci_lock_rescan_remove(); |
2f320521 YL |
496 | if (!pci_is_root_bus(bus) && list_empty(&bus->devices)) |
497 | pci_rescan_bus_bridge_resize(bus->self); | |
498 | else | |
499 | pci_rescan_bus(bus); | |
9d16947b | 500 | pci_unlock_rescan_remove(); |
b9d320fc YL |
501 | } |
502 | return count; | |
503 | } | |
56039e65 | 504 | static DEVICE_ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store); |
b9d320fc | 505 | |
fbb988be | 506 | #if defined(CONFIG_PM) && defined(CONFIG_ACPI) |
448bd857 HY |
507 | static ssize_t d3cold_allowed_store(struct device *dev, |
508 | struct device_attribute *attr, | |
509 | const char *buf, size_t count) | |
510 | { | |
511 | struct pci_dev *pdev = to_pci_dev(dev); | |
512 | unsigned long val; | |
513 | ||
9a994e8e | 514 | if (kstrtoul(buf, 0, &val) < 0) |
448bd857 HY |
515 | return -EINVAL; |
516 | ||
517 | pdev->d3cold_allowed = !!val; | |
9d26d3a8 MW |
518 | if (pdev->d3cold_allowed) |
519 | pci_d3cold_enable(pdev); | |
520 | else | |
521 | pci_d3cold_disable(pdev); | |
522 | ||
448bd857 HY |
523 | pm_runtime_resume(dev); |
524 | ||
525 | return count; | |
526 | } | |
527 | ||
528 | static ssize_t d3cold_allowed_show(struct device *dev, | |
529 | struct device_attribute *attr, char *buf) | |
530 | { | |
531 | struct pci_dev *pdev = to_pci_dev(dev); | |
3c78bc61 | 532 | return sprintf(buf, "%u\n", pdev->d3cold_allowed); |
448bd857 | 533 | } |
5136b2da | 534 | static DEVICE_ATTR_RW(d3cold_allowed); |
448bd857 HY |
535 | #endif |
536 | ||
dfc73e7a SO |
537 | #ifdef CONFIG_OF |
538 | static ssize_t devspec_show(struct device *dev, | |
539 | struct device_attribute *attr, char *buf) | |
540 | { | |
541 | struct pci_dev *pdev = to_pci_dev(dev); | |
542 | struct device_node *np = pci_device_to_OF_node(pdev); | |
543 | ||
b63773a8 | 544 | if (np == NULL) |
dfc73e7a | 545 | return 0; |
b63773a8 | 546 | return sprintf(buf, "%pOF", np); |
dfc73e7a SO |
547 | } |
548 | static DEVICE_ATTR_RO(devspec); | |
549 | #endif | |
550 | ||
1789382a DD |
551 | #ifdef CONFIG_PCI_IOV |
552 | static ssize_t sriov_totalvfs_show(struct device *dev, | |
553 | struct device_attribute *attr, | |
554 | char *buf) | |
555 | { | |
556 | struct pci_dev *pdev = to_pci_dev(dev); | |
557 | ||
bff73156 | 558 | return sprintf(buf, "%u\n", pci_sriov_get_totalvfs(pdev)); |
1789382a DD |
559 | } |
560 | ||
561 | ||
562 | static ssize_t sriov_numvfs_show(struct device *dev, | |
563 | struct device_attribute *attr, | |
564 | char *buf) | |
565 | { | |
566 | struct pci_dev *pdev = to_pci_dev(dev); | |
567 | ||
6b136724 | 568 | return sprintf(buf, "%u\n", pdev->sriov->num_VFs); |
1789382a DD |
569 | } |
570 | ||
571 | /* | |
faa48a50 BH |
572 | * num_vfs > 0; number of VFs to enable |
573 | * num_vfs = 0; disable all VFs | |
1789382a DD |
574 | * |
575 | * Note: SRIOV spec doesn't allow partial VF | |
faa48a50 | 576 | * disable, so it's all or none. |
1789382a DD |
577 | */ |
578 | static ssize_t sriov_numvfs_store(struct device *dev, | |
579 | struct device_attribute *attr, | |
580 | const char *buf, size_t count) | |
581 | { | |
582 | struct pci_dev *pdev = to_pci_dev(dev); | |
faa48a50 BH |
583 | int ret; |
584 | u16 num_vfs; | |
1789382a | 585 | |
faa48a50 BH |
586 | ret = kstrtou16(buf, 0, &num_vfs); |
587 | if (ret < 0) | |
588 | return ret; | |
589 | ||
590 | if (num_vfs > pci_sriov_get_totalvfs(pdev)) | |
591 | return -ERANGE; | |
592 | ||
17530e71 | 593 | device_lock(&pdev->dev); |
5b0948df | 594 | |
faa48a50 | 595 | if (num_vfs == pdev->sriov->num_VFs) |
5b0948df | 596 | goto exit; |
1789382a DD |
597 | |
598 | /* is PF driver loaded w/callback */ | |
599 | if (!pdev->driver || !pdev->driver->sriov_configure) { | |
7506dc79 | 600 | pci_info(pdev, "Driver doesn't support SRIOV configuration via sysfs\n"); |
5b0948df ET |
601 | ret = -ENOENT; |
602 | goto exit; | |
1789382a DD |
603 | } |
604 | ||
faa48a50 BH |
605 | if (num_vfs == 0) { |
606 | /* disable VFs */ | |
607 | ret = pdev->driver->sriov_configure(pdev, 0); | |
5b0948df | 608 | goto exit; |
1789382a DD |
609 | } |
610 | ||
faa48a50 BH |
611 | /* enable VFs */ |
612 | if (pdev->sriov->num_VFs) { | |
7506dc79 | 613 | pci_warn(pdev, "%d VFs already enabled. Disable before enabling %d VFs\n", |
faa48a50 | 614 | pdev->sriov->num_VFs, num_vfs); |
5b0948df ET |
615 | ret = -EBUSY; |
616 | goto exit; | |
1789382a DD |
617 | } |
618 | ||
faa48a50 BH |
619 | ret = pdev->driver->sriov_configure(pdev, num_vfs); |
620 | if (ret < 0) | |
5b0948df | 621 | goto exit; |
1789382a | 622 | |
faa48a50 | 623 | if (ret != num_vfs) |
7506dc79 | 624 | pci_warn(pdev, "%d VFs requested; only %d enabled\n", |
faa48a50 BH |
625 | num_vfs, ret); |
626 | ||
5b0948df | 627 | exit: |
17530e71 | 628 | device_unlock(&pdev->dev); |
5b0948df ET |
629 | |
630 | if (ret < 0) | |
631 | return ret; | |
632 | ||
faa48a50 | 633 | return count; |
1789382a DD |
634 | } |
635 | ||
7dfca152 FS |
636 | static ssize_t sriov_offset_show(struct device *dev, |
637 | struct device_attribute *attr, | |
638 | char *buf) | |
639 | { | |
640 | struct pci_dev *pdev = to_pci_dev(dev); | |
641 | ||
642 | return sprintf(buf, "%u\n", pdev->sriov->offset); | |
643 | } | |
644 | ||
645 | static ssize_t sriov_stride_show(struct device *dev, | |
646 | struct device_attribute *attr, | |
647 | char *buf) | |
648 | { | |
649 | struct pci_dev *pdev = to_pci_dev(dev); | |
650 | ||
651 | return sprintf(buf, "%u\n", pdev->sriov->stride); | |
652 | } | |
653 | ||
654 | static ssize_t sriov_vf_device_show(struct device *dev, | |
655 | struct device_attribute *attr, | |
656 | char *buf) | |
657 | { | |
658 | struct pci_dev *pdev = to_pci_dev(dev); | |
659 | ||
660 | return sprintf(buf, "%x\n", pdev->sriov->vf_device); | |
661 | } | |
662 | ||
0e7df224 BW |
663 | static ssize_t sriov_drivers_autoprobe_show(struct device *dev, |
664 | struct device_attribute *attr, | |
665 | char *buf) | |
666 | { | |
667 | struct pci_dev *pdev = to_pci_dev(dev); | |
668 | ||
669 | return sprintf(buf, "%u\n", pdev->sriov->drivers_autoprobe); | |
670 | } | |
671 | ||
672 | static ssize_t sriov_drivers_autoprobe_store(struct device *dev, | |
673 | struct device_attribute *attr, | |
674 | const char *buf, size_t count) | |
675 | { | |
676 | struct pci_dev *pdev = to_pci_dev(dev); | |
677 | bool drivers_autoprobe; | |
678 | ||
679 | if (kstrtobool(buf, &drivers_autoprobe) < 0) | |
680 | return -EINVAL; | |
681 | ||
682 | pdev->sriov->drivers_autoprobe = drivers_autoprobe; | |
683 | ||
684 | return count; | |
685 | } | |
686 | ||
1789382a DD |
687 | static struct device_attribute sriov_totalvfs_attr = __ATTR_RO(sriov_totalvfs); |
688 | static struct device_attribute sriov_numvfs_attr = | |
689 | __ATTR(sriov_numvfs, (S_IRUGO|S_IWUSR|S_IWGRP), | |
690 | sriov_numvfs_show, sriov_numvfs_store); | |
7dfca152 FS |
691 | static struct device_attribute sriov_offset_attr = __ATTR_RO(sriov_offset); |
692 | static struct device_attribute sriov_stride_attr = __ATTR_RO(sriov_stride); | |
693 | static struct device_attribute sriov_vf_device_attr = __ATTR_RO(sriov_vf_device); | |
0e7df224 BW |
694 | static struct device_attribute sriov_drivers_autoprobe_attr = |
695 | __ATTR(sriov_drivers_autoprobe, (S_IRUGO|S_IWUSR|S_IWGRP), | |
696 | sriov_drivers_autoprobe_show, sriov_drivers_autoprobe_store); | |
1789382a DD |
697 | #endif /* CONFIG_PCI_IOV */ |
698 | ||
782a985d AW |
699 | static ssize_t driver_override_store(struct device *dev, |
700 | struct device_attribute *attr, | |
701 | const char *buf, size_t count) | |
702 | { | |
703 | struct pci_dev *pdev = to_pci_dev(dev); | |
9561475d | 704 | char *driver_override, *old, *cp; |
782a985d | 705 | |
4efe874a SL |
706 | /* We need to keep extra room for a newline */ |
707 | if (count >= (PAGE_SIZE - 1)) | |
782a985d AW |
708 | return -EINVAL; |
709 | ||
710 | driver_override = kstrndup(buf, count, GFP_KERNEL); | |
711 | if (!driver_override) | |
712 | return -ENOMEM; | |
713 | ||
714 | cp = strchr(driver_override, '\n'); | |
715 | if (cp) | |
716 | *cp = '\0'; | |
717 | ||
9561475d NS |
718 | device_lock(dev); |
719 | old = pdev->driver_override; | |
782a985d AW |
720 | if (strlen(driver_override)) { |
721 | pdev->driver_override = driver_override; | |
722 | } else { | |
723 | kfree(driver_override); | |
724 | pdev->driver_override = NULL; | |
725 | } | |
9561475d | 726 | device_unlock(dev); |
782a985d AW |
727 | |
728 | kfree(old); | |
729 | ||
730 | return count; | |
731 | } | |
732 | ||
733 | static ssize_t driver_override_show(struct device *dev, | |
734 | struct device_attribute *attr, char *buf) | |
735 | { | |
736 | struct pci_dev *pdev = to_pci_dev(dev); | |
9561475d | 737 | ssize_t len; |
782a985d | 738 | |
9561475d NS |
739 | device_lock(dev); |
740 | len = snprintf(buf, PAGE_SIZE, "%s\n", pdev->driver_override); | |
741 | device_unlock(dev); | |
742 | return len; | |
782a985d AW |
743 | } |
744 | static DEVICE_ATTR_RW(driver_override); | |
745 | ||
bf22c90f | 746 | static struct attribute *pci_dev_attrs[] = { |
5136b2da GKH |
747 | &dev_attr_resource.attr, |
748 | &dev_attr_vendor.attr, | |
749 | &dev_attr_device.attr, | |
750 | &dev_attr_subsystem_vendor.attr, | |
751 | &dev_attr_subsystem_device.attr, | |
702ed3be | 752 | &dev_attr_revision.attr, |
5136b2da GKH |
753 | &dev_attr_class.attr, |
754 | &dev_attr_irq.attr, | |
755 | &dev_attr_local_cpus.attr, | |
756 | &dev_attr_local_cpulist.attr, | |
757 | &dev_attr_modalias.attr, | |
81bb0e19 | 758 | #ifdef CONFIG_NUMA |
5136b2da | 759 | &dev_attr_numa_node.attr, |
81bb0e19 | 760 | #endif |
5136b2da GKH |
761 | &dev_attr_dma_mask_bits.attr, |
762 | &dev_attr_consistent_dma_mask_bits.attr, | |
d8e7d53a | 763 | &dev_attr_enable.attr, |
5136b2da GKH |
764 | &dev_attr_broken_parity_status.attr, |
765 | &dev_attr_msi_bus.attr, | |
fbb988be | 766 | #if defined(CONFIG_PM) && defined(CONFIG_ACPI) |
5136b2da | 767 | &dev_attr_d3cold_allowed.attr, |
dfc73e7a SO |
768 | #endif |
769 | #ifdef CONFIG_OF | |
770 | &dev_attr_devspec.attr, | |
77c27c7b | 771 | #endif |
782a985d | 772 | &dev_attr_driver_override.attr, |
0077a845 | 773 | &dev_attr_ari_enabled.attr, |
5136b2da GKH |
774 | NULL, |
775 | }; | |
776 | ||
56c1af46 WVK |
777 | static struct attribute *pci_bridge_attrs[] = { |
778 | &dev_attr_subordinate_bus_number.attr, | |
779 | &dev_attr_secondary_bus_number.attr, | |
780 | NULL, | |
5136b2da GKH |
781 | }; |
782 | ||
56c1af46 WVK |
783 | static struct attribute *pcie_dev_attrs[] = { |
784 | &dev_attr_current_link_speed.attr, | |
785 | &dev_attr_current_link_width.attr, | |
786 | &dev_attr_max_link_width.attr, | |
787 | &dev_attr_max_link_speed.attr, | |
5136b2da | 788 | NULL, |
1da177e4 LT |
789 | }; |
790 | ||
56039e65 GKH |
791 | static struct attribute *pcibus_attrs[] = { |
792 | &dev_attr_rescan.attr, | |
793 | &dev_attr_cpuaffinity.attr, | |
794 | &dev_attr_cpulistaffinity.attr, | |
795 | NULL, | |
796 | }; | |
797 | ||
798 | static const struct attribute_group pcibus_group = { | |
799 | .attrs = pcibus_attrs, | |
800 | }; | |
801 | ||
802 | const struct attribute_group *pcibus_groups[] = { | |
803 | &pcibus_group, | |
804 | NULL, | |
b9d320fc YL |
805 | }; |
806 | ||
3c78bc61 RD |
807 | static ssize_t boot_vga_show(struct device *dev, struct device_attribute *attr, |
808 | char *buf) | |
217f45de DA |
809 | { |
810 | struct pci_dev *pdev = to_pci_dev(dev); | |
1a39b310 MG |
811 | struct pci_dev *vga_dev = vga_default_device(); |
812 | ||
813 | if (vga_dev) | |
814 | return sprintf(buf, "%u\n", (pdev == vga_dev)); | |
217f45de DA |
815 | |
816 | return sprintf(buf, "%u\n", | |
817 | !!(pdev->resource[PCI_ROM_RESOURCE].flags & | |
818 | IORESOURCE_ROM_SHADOW)); | |
819 | } | |
bf22c90f | 820 | static struct device_attribute vga_attr = __ATTR_RO(boot_vga); |
217f45de | 821 | |
3c78bc61 RD |
822 | static ssize_t pci_read_config(struct file *filp, struct kobject *kobj, |
823 | struct bin_attribute *bin_attr, char *buf, | |
824 | loff_t off, size_t count) | |
1da177e4 | 825 | { |
554a6037 | 826 | struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj)); |
1da177e4 LT |
827 | unsigned int size = 64; |
828 | loff_t init_off = off; | |
3c78bc61 | 829 | u8 *data = (u8 *) buf; |
1da177e4 LT |
830 | |
831 | /* Several chips lock up trying to read undefined config space */ | |
ab0fa82b | 832 | if (file_ns_capable(filp, &init_user_ns, CAP_SYS_ADMIN)) |
1da177e4 | 833 | size = dev->cfg_size; |
3c78bc61 | 834 | else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) |
1da177e4 | 835 | size = 128; |
1da177e4 LT |
836 | |
837 | if (off > size) | |
838 | return 0; | |
839 | if (off + count > size) { | |
840 | size -= off; | |
841 | count = size; | |
842 | } else { | |
843 | size = count; | |
844 | } | |
845 | ||
3d8387ef HY |
846 | pci_config_pm_runtime_get(dev); |
847 | ||
4c0619ad | 848 | if ((off & 1) && size) { |
849 | u8 val; | |
e04b0ea2 | 850 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 851 | data[off - init_off] = val; |
1da177e4 | 852 | off++; |
4c0619ad | 853 | size--; |
854 | } | |
855 | ||
856 | if ((off & 3) && size > 2) { | |
857 | u16 val; | |
e04b0ea2 | 858 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 859 | data[off - init_off] = val & 0xff; |
860 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
861 | off += 2; | |
862 | size -= 2; | |
1da177e4 LT |
863 | } |
864 | ||
865 | while (size > 3) { | |
4c0619ad | 866 | u32 val; |
e04b0ea2 | 867 | pci_user_read_config_dword(dev, off, &val); |
4c0619ad | 868 | data[off - init_off] = val & 0xff; |
869 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
870 | data[off - init_off + 2] = (val >> 16) & 0xff; | |
871 | data[off - init_off + 3] = (val >> 24) & 0xff; | |
1da177e4 LT |
872 | off += 4; |
873 | size -= 4; | |
874 | } | |
875 | ||
4c0619ad | 876 | if (size >= 2) { |
877 | u16 val; | |
e04b0ea2 | 878 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 879 | data[off - init_off] = val & 0xff; |
880 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
881 | off += 2; | |
882 | size -= 2; | |
883 | } | |
884 | ||
885 | if (size > 0) { | |
886 | u8 val; | |
e04b0ea2 | 887 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 888 | data[off - init_off] = val; |
1da177e4 LT |
889 | off++; |
890 | --size; | |
891 | } | |
892 | ||
3d8387ef HY |
893 | pci_config_pm_runtime_put(dev); |
894 | ||
1da177e4 LT |
895 | return count; |
896 | } | |
897 | ||
3c78bc61 RD |
898 | static ssize_t pci_write_config(struct file *filp, struct kobject *kobj, |
899 | struct bin_attribute *bin_attr, char *buf, | |
900 | loff_t off, size_t count) | |
1da177e4 | 901 | { |
554a6037 | 902 | struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj)); |
1da177e4 LT |
903 | unsigned int size = count; |
904 | loff_t init_off = off; | |
3c78bc61 | 905 | u8 *data = (u8 *) buf; |
1da177e4 LT |
906 | |
907 | if (off > dev->cfg_size) | |
908 | return 0; | |
909 | if (off + count > dev->cfg_size) { | |
910 | size = dev->cfg_size - off; | |
911 | count = size; | |
912 | } | |
f7625980 | 913 | |
3d8387ef HY |
914 | pci_config_pm_runtime_get(dev); |
915 | ||
4c0619ad | 916 | if ((off & 1) && size) { |
e04b0ea2 | 917 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 | 918 | off++; |
4c0619ad | 919 | size--; |
1da177e4 | 920 | } |
f7625980 | 921 | |
4c0619ad | 922 | if ((off & 3) && size > 2) { |
923 | u16 val = data[off - init_off]; | |
924 | val |= (u16) data[off - init_off + 1] << 8; | |
3c78bc61 RD |
925 | pci_user_write_config_word(dev, off, val); |
926 | off += 2; | |
927 | size -= 2; | |
928 | } | |
1da177e4 LT |
929 | |
930 | while (size > 3) { | |
4c0619ad | 931 | u32 val = data[off - init_off]; |
932 | val |= (u32) data[off - init_off + 1] << 8; | |
933 | val |= (u32) data[off - init_off + 2] << 16; | |
934 | val |= (u32) data[off - init_off + 3] << 24; | |
e04b0ea2 | 935 | pci_user_write_config_dword(dev, off, val); |
1da177e4 LT |
936 | off += 4; |
937 | size -= 4; | |
938 | } | |
f7625980 | 939 | |
4c0619ad | 940 | if (size >= 2) { |
941 | u16 val = data[off - init_off]; | |
942 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 943 | pci_user_write_config_word(dev, off, val); |
4c0619ad | 944 | off += 2; |
945 | size -= 2; | |
946 | } | |
1da177e4 | 947 | |
4c0619ad | 948 | if (size) { |
e04b0ea2 | 949 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 LT |
950 | off++; |
951 | --size; | |
952 | } | |
953 | ||
3d8387ef HY |
954 | pci_config_pm_runtime_put(dev); |
955 | ||
1da177e4 LT |
956 | return count; |
957 | } | |
958 | ||
959 | #ifdef HAVE_PCI_LEGACY | |
960 | /** | |
961 | * pci_read_legacy_io - read byte(s) from legacy I/O port space | |
2c3c8bea | 962 | * @filp: open sysfs file |
1da177e4 | 963 | * @kobj: kobject corresponding to file to read from |
cffb2faf | 964 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
965 | * @buf: buffer to store results |
966 | * @off: offset into legacy I/O port space | |
967 | * @count: number of bytes to read | |
968 | * | |
969 | * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
970 | * callback routine (pci_legacy_read). | |
971 | */ | |
3c78bc61 RD |
972 | static ssize_t pci_read_legacy_io(struct file *filp, struct kobject *kobj, |
973 | struct bin_attribute *bin_attr, char *buf, | |
974 | loff_t off, size_t count) | |
1da177e4 | 975 | { |
554a6037 | 976 | struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); |
1da177e4 | 977 | |
3c78bc61 RD |
978 | /* Only support 1, 2 or 4 byte accesses */ |
979 | if (count != 1 && count != 2 && count != 4) | |
980 | return -EINVAL; | |
1da177e4 | 981 | |
3c78bc61 | 982 | return pci_legacy_read(bus, off, (u32 *)buf, count); |
1da177e4 LT |
983 | } |
984 | ||
985 | /** | |
986 | * pci_write_legacy_io - write byte(s) to legacy I/O port space | |
2c3c8bea | 987 | * @filp: open sysfs file |
1da177e4 | 988 | * @kobj: kobject corresponding to file to read from |
cffb2faf | 989 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
990 | * @buf: buffer containing value to be written |
991 | * @off: offset into legacy I/O port space | |
992 | * @count: number of bytes to write | |
993 | * | |
994 | * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
995 | * callback routine (pci_legacy_write). | |
996 | */ | |
3c78bc61 RD |
997 | static ssize_t pci_write_legacy_io(struct file *filp, struct kobject *kobj, |
998 | struct bin_attribute *bin_attr, char *buf, | |
999 | loff_t off, size_t count) | |
1da177e4 | 1000 | { |
554a6037 | 1001 | struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); |
1da177e4 | 1002 | |
3c78bc61 RD |
1003 | /* Only support 1, 2 or 4 byte accesses */ |
1004 | if (count != 1 && count != 2 && count != 4) | |
1005 | return -EINVAL; | |
1006 | ||
1007 | return pci_legacy_write(bus, off, *(u32 *)buf, count); | |
1da177e4 LT |
1008 | } |
1009 | ||
1010 | /** | |
1011 | * pci_mmap_legacy_mem - map legacy PCI memory into user memory space | |
2c3c8bea | 1012 | * @filp: open sysfs file |
1da177e4 LT |
1013 | * @kobj: kobject corresponding to device to be mapped |
1014 | * @attr: struct bin_attribute for this file | |
1015 | * @vma: struct vm_area_struct passed to mmap | |
1016 | * | |
f19aeb1f | 1017 | * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap |
1da177e4 LT |
1018 | * legacy memory space (first meg of bus space) into application virtual |
1019 | * memory space. | |
1020 | */ | |
3c78bc61 RD |
1021 | static int pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj, |
1022 | struct bin_attribute *attr, | |
1023 | struct vm_area_struct *vma) | |
1da177e4 | 1024 | { |
554a6037 | 1025 | struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); |
1da177e4 | 1026 | |
3c78bc61 | 1027 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem); |
f19aeb1f BH |
1028 | } |
1029 | ||
1030 | /** | |
1031 | * pci_mmap_legacy_io - map legacy PCI IO into user memory space | |
2c3c8bea | 1032 | * @filp: open sysfs file |
f19aeb1f BH |
1033 | * @kobj: kobject corresponding to device to be mapped |
1034 | * @attr: struct bin_attribute for this file | |
1035 | * @vma: struct vm_area_struct passed to mmap | |
1036 | * | |
1037 | * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap | |
1038 | * legacy IO space (first meg of bus space) into application virtual | |
1039 | * memory space. Returns -ENOSYS if the operation isn't supported | |
1040 | */ | |
3c78bc61 RD |
1041 | static int pci_mmap_legacy_io(struct file *filp, struct kobject *kobj, |
1042 | struct bin_attribute *attr, | |
1043 | struct vm_area_struct *vma) | |
f19aeb1f | 1044 | { |
554a6037 | 1045 | struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); |
f19aeb1f | 1046 | |
3c78bc61 | 1047 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io); |
f19aeb1f BH |
1048 | } |
1049 | ||
10a0ef39 IK |
1050 | /** |
1051 | * pci_adjust_legacy_attr - adjustment of legacy file attributes | |
1052 | * @b: bus to create files under | |
1053 | * @mmap_type: I/O port or memory | |
1054 | * | |
1055 | * Stub implementation. Can be overridden by arch if necessary. | |
1056 | */ | |
3c78bc61 RD |
1057 | void __weak pci_adjust_legacy_attr(struct pci_bus *b, |
1058 | enum pci_mmap_state mmap_type) | |
10a0ef39 | 1059 | { |
10a0ef39 IK |
1060 | } |
1061 | ||
f19aeb1f BH |
1062 | /** |
1063 | * pci_create_legacy_files - create legacy I/O port and memory files | |
1064 | * @b: bus to create files under | |
1065 | * | |
1066 | * Some platforms allow access to legacy I/O port and ISA memory space on | |
1067 | * a per-bus basis. This routine creates the files and ties them into | |
1068 | * their associated read, write and mmap files from pci-sysfs.c | |
1069 | * | |
25985edc | 1070 | * On error unwind, but don't propagate the error to the caller |
f19aeb1f BH |
1071 | * as it is ok to set up the PCI bus without these files. |
1072 | */ | |
1073 | void pci_create_legacy_files(struct pci_bus *b) | |
1074 | { | |
1075 | int error; | |
1076 | ||
6396bb22 | 1077 | b->legacy_io = kcalloc(2, sizeof(struct bin_attribute), |
f19aeb1f BH |
1078 | GFP_ATOMIC); |
1079 | if (!b->legacy_io) | |
1080 | goto kzalloc_err; | |
1081 | ||
62e877b8 | 1082 | sysfs_bin_attr_init(b->legacy_io); |
f19aeb1f BH |
1083 | b->legacy_io->attr.name = "legacy_io"; |
1084 | b->legacy_io->size = 0xffff; | |
1085 | b->legacy_io->attr.mode = S_IRUSR | S_IWUSR; | |
1086 | b->legacy_io->read = pci_read_legacy_io; | |
1087 | b->legacy_io->write = pci_write_legacy_io; | |
1088 | b->legacy_io->mmap = pci_mmap_legacy_io; | |
10a0ef39 | 1089 | pci_adjust_legacy_attr(b, pci_mmap_io); |
f19aeb1f BH |
1090 | error = device_create_bin_file(&b->dev, b->legacy_io); |
1091 | if (error) | |
1092 | goto legacy_io_err; | |
1093 | ||
1094 | /* Allocated above after the legacy_io struct */ | |
1095 | b->legacy_mem = b->legacy_io + 1; | |
6757eca3 | 1096 | sysfs_bin_attr_init(b->legacy_mem); |
f19aeb1f BH |
1097 | b->legacy_mem->attr.name = "legacy_mem"; |
1098 | b->legacy_mem->size = 1024*1024; | |
1099 | b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR; | |
1100 | b->legacy_mem->mmap = pci_mmap_legacy_mem; | |
10a0ef39 | 1101 | pci_adjust_legacy_attr(b, pci_mmap_mem); |
f19aeb1f BH |
1102 | error = device_create_bin_file(&b->dev, b->legacy_mem); |
1103 | if (error) | |
1104 | goto legacy_mem_err; | |
1105 | ||
1106 | return; | |
1107 | ||
1108 | legacy_mem_err: | |
1109 | device_remove_bin_file(&b->dev, b->legacy_io); | |
1110 | legacy_io_err: | |
1111 | kfree(b->legacy_io); | |
1112 | b->legacy_io = NULL; | |
1113 | kzalloc_err: | |
7db4af43 | 1114 | dev_warn(&b->dev, "could not create legacy I/O port and ISA memory resources in sysfs\n"); |
f19aeb1f BH |
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 | 1448 | |
82c3fbff | 1449 | pm_runtime_get_sync(dev); |
447c5dd7 | 1450 | result = pci_reset_function(pdev); |
82c3fbff | 1451 | pm_runtime_put(dev); |
447c5dd7 MS |
1452 | if (result < 0) |
1453 | return result; | |
1454 | ||
1455 | return count; | |
711d5779 MT |
1456 | } |
1457 | ||
1458 | static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store); | |
1459 | ||
280c73d3 ZY |
1460 | static int pci_create_capabilities_sysfs(struct pci_dev *dev) |
1461 | { | |
1462 | int retval; | |
280c73d3 | 1463 | |
b1c615c4 | 1464 | pcie_vpd_create_sysfs_dev_files(dev); |
280c73d3 ZY |
1465 | pcie_aspm_create_sysfs_dev_files(dev); |
1466 | ||
5b0764ca | 1467 | if (dev->reset_fn) { |
711d5779 MT |
1468 | retval = device_create_file(&dev->dev, &reset_attr); |
1469 | if (retval) | |
1470 | goto error; | |
711d5779 | 1471 | } |
280c73d3 | 1472 | return 0; |
711d5779 MT |
1473 | |
1474 | error: | |
1475 | pcie_aspm_remove_sysfs_dev_files(dev); | |
b1c615c4 | 1476 | pcie_vpd_remove_sysfs_dev_files(dev); |
711d5779 | 1477 | return retval; |
280c73d3 ZY |
1478 | } |
1479 | ||
3c78bc61 | 1480 | int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev) |
1da177e4 | 1481 | { |
b19441af | 1482 | int retval; |
ac0c302a | 1483 | int rom_size; |
280c73d3 | 1484 | struct bin_attribute *attr; |
b19441af | 1485 | |
1da177e4 LT |
1486 | if (!sysfs_initialized) |
1487 | return -EACCES; | |
1488 | ||
c20aecf6 | 1489 | if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) |
b19441af | 1490 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
c20aecf6 JM |
1491 | else |
1492 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr); | |
b19441af GKH |
1493 | if (retval) |
1494 | goto err; | |
1da177e4 | 1495 | |
b19441af GKH |
1496 | retval = pci_create_resource_files(pdev); |
1497 | if (retval) | |
280c73d3 ZY |
1498 | goto err_config_file; |
1499 | ||
1da177e4 | 1500 | /* If the device has a ROM, try to expose it in sysfs. */ |
ac0c302a | 1501 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); |
280c73d3 | 1502 | if (rom_size) { |
94e61088 | 1503 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); |
280c73d3 | 1504 | if (!attr) { |
b19441af | 1505 | retval = -ENOMEM; |
9890b12a | 1506 | goto err_resource_files; |
1da177e4 | 1507 | } |
a07e4156 | 1508 | sysfs_bin_attr_init(attr); |
280c73d3 ZY |
1509 | attr->size = rom_size; |
1510 | attr->attr.name = "rom"; | |
ff29530e | 1511 | attr->attr.mode = S_IRUSR | S_IWUSR; |
280c73d3 ZY |
1512 | attr->read = pci_read_rom; |
1513 | attr->write = pci_write_rom; | |
1514 | retval = sysfs_create_bin_file(&pdev->dev.kobj, attr); | |
1515 | if (retval) { | |
1516 | kfree(attr); | |
1517 | goto err_resource_files; | |
1518 | } | |
1519 | pdev->rom_attr = attr; | |
1da177e4 | 1520 | } |
280c73d3 | 1521 | |
280c73d3 ZY |
1522 | /* add sysfs entries for various capabilities */ |
1523 | retval = pci_create_capabilities_sysfs(pdev); | |
1524 | if (retval) | |
625e1d59 | 1525 | goto err_rom_file; |
7d715a6c | 1526 | |
911e1c9b N |
1527 | pci_create_firmware_label_files(pdev); |
1528 | ||
1da177e4 | 1529 | return 0; |
b19441af | 1530 | |
a2cd52ca | 1531 | err_rom_file: |
9d88b93b | 1532 | if (pdev->rom_attr) { |
94e61088 | 1533 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); |
280c73d3 ZY |
1534 | kfree(pdev->rom_attr); |
1535 | pdev->rom_attr = NULL; | |
1536 | } | |
9890b12a ME |
1537 | err_resource_files: |
1538 | pci_remove_resource_files(pdev); | |
94e61088 | 1539 | err_config_file: |
c20aecf6 | 1540 | if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) |
b19441af | 1541 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
c20aecf6 JM |
1542 | else |
1543 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); | |
b19441af GKH |
1544 | err: |
1545 | return retval; | |
1da177e4 LT |
1546 | } |
1547 | ||
280c73d3 ZY |
1548 | static void pci_remove_capabilities_sysfs(struct pci_dev *dev) |
1549 | { | |
b1c615c4 | 1550 | pcie_vpd_remove_sysfs_dev_files(dev); |
280c73d3 | 1551 | pcie_aspm_remove_sysfs_dev_files(dev); |
711d5779 MT |
1552 | if (dev->reset_fn) { |
1553 | device_remove_file(&dev->dev, &reset_attr); | |
1554 | dev->reset_fn = 0; | |
1555 | } | |
280c73d3 ZY |
1556 | } |
1557 | ||
1da177e4 LT |
1558 | /** |
1559 | * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files | |
1560 | * @pdev: device whose entries we should free | |
1561 | * | |
1562 | * Cleanup when @pdev is removed from sysfs. | |
1563 | */ | |
1564 | void pci_remove_sysfs_dev_files(struct pci_dev *pdev) | |
1565 | { | |
d67afe5e DM |
1566 | if (!sysfs_initialized) |
1567 | return; | |
1568 | ||
280c73d3 | 1569 | pci_remove_capabilities_sysfs(pdev); |
7d715a6c | 1570 | |
c20aecf6 | 1571 | if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) |
1da177e4 | 1572 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
c20aecf6 JM |
1573 | else |
1574 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); | |
1da177e4 LT |
1575 | |
1576 | pci_remove_resource_files(pdev); | |
1577 | ||
9d88b93b | 1578 | if (pdev->rom_attr) { |
280c73d3 ZY |
1579 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); |
1580 | kfree(pdev->rom_attr); | |
9d88b93b | 1581 | pdev->rom_attr = NULL; |
1da177e4 | 1582 | } |
911e1c9b N |
1583 | |
1584 | pci_remove_firmware_label_files(pdev); | |
1da177e4 LT |
1585 | } |
1586 | ||
1587 | static int __init pci_sysfs_init(void) | |
1588 | { | |
1589 | struct pci_dev *pdev = NULL; | |
b19441af GKH |
1590 | int retval; |
1591 | ||
1da177e4 | 1592 | sysfs_initialized = 1; |
b19441af GKH |
1593 | for_each_pci_dev(pdev) { |
1594 | retval = pci_create_sysfs_dev_files(pdev); | |
151fc5df JL |
1595 | if (retval) { |
1596 | pci_dev_put(pdev); | |
b19441af | 1597 | return retval; |
151fc5df | 1598 | } |
b19441af | 1599 | } |
1da177e4 LT |
1600 | |
1601 | return 0; | |
1602 | } | |
40ee9e9f | 1603 | late_initcall(pci_sysfs_init); |
4e15c46b YL |
1604 | |
1605 | static struct attribute *pci_dev_dev_attrs[] = { | |
625e1d59 | 1606 | &vga_attr.attr, |
4e15c46b YL |
1607 | NULL, |
1608 | }; | |
1609 | ||
1610 | static umode_t pci_dev_attrs_are_visible(struct kobject *kobj, | |
3c78bc61 | 1611 | struct attribute *a, int n) |
4e15c46b | 1612 | { |
554a6037 | 1613 | struct device *dev = kobj_to_dev(kobj); |
625e1d59 YL |
1614 | struct pci_dev *pdev = to_pci_dev(dev); |
1615 | ||
1616 | if (a == &vga_attr.attr) | |
1617 | if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
1618 | return 0; | |
1619 | ||
4e15c46b YL |
1620 | return a->mode; |
1621 | } | |
1622 | ||
dfab88be JL |
1623 | static struct attribute *pci_dev_hp_attrs[] = { |
1624 | &dev_remove_attr.attr, | |
1625 | &dev_rescan_attr.attr, | |
1626 | NULL, | |
1627 | }; | |
1628 | ||
1629 | static umode_t pci_dev_hp_attrs_are_visible(struct kobject *kobj, | |
3c78bc61 | 1630 | struct attribute *a, int n) |
dfab88be | 1631 | { |
554a6037 | 1632 | struct device *dev = kobj_to_dev(kobj); |
dfab88be JL |
1633 | struct pci_dev *pdev = to_pci_dev(dev); |
1634 | ||
1635 | if (pdev->is_virtfn) | |
1636 | return 0; | |
1637 | ||
1638 | return a->mode; | |
1639 | } | |
1640 | ||
56c1af46 WVK |
1641 | static umode_t pci_bridge_attrs_are_visible(struct kobject *kobj, |
1642 | struct attribute *a, int n) | |
1643 | { | |
1644 | struct device *dev = kobj_to_dev(kobj); | |
1645 | struct pci_dev *pdev = to_pci_dev(dev); | |
1646 | ||
1647 | if (pci_is_bridge(pdev)) | |
1648 | return a->mode; | |
1649 | ||
1650 | return 0; | |
1651 | } | |
1652 | ||
1653 | static umode_t pcie_dev_attrs_are_visible(struct kobject *kobj, | |
1654 | struct attribute *a, int n) | |
1655 | { | |
1656 | struct device *dev = kobj_to_dev(kobj); | |
1657 | struct pci_dev *pdev = to_pci_dev(dev); | |
1658 | ||
1659 | if (pci_is_pcie(pdev)) | |
1660 | return a->mode; | |
1661 | ||
1662 | return 0; | |
1663 | } | |
1664 | ||
1665 | static const struct attribute_group pci_dev_group = { | |
1666 | .attrs = pci_dev_attrs, | |
1667 | }; | |
1668 | ||
1669 | const struct attribute_group *pci_dev_groups[] = { | |
1670 | &pci_dev_group, | |
1671 | NULL, | |
1672 | }; | |
1673 | ||
1674 | static const struct attribute_group pci_bridge_group = { | |
1675 | .attrs = pci_bridge_attrs, | |
1676 | }; | |
1677 | ||
1678 | const struct attribute_group *pci_bridge_groups[] = { | |
1679 | &pci_bridge_group, | |
1680 | NULL, | |
1681 | }; | |
1682 | ||
1683 | static const struct attribute_group pcie_dev_group = { | |
1684 | .attrs = pcie_dev_attrs, | |
1685 | }; | |
1686 | ||
1687 | const struct attribute_group *pcie_dev_groups[] = { | |
1688 | &pcie_dev_group, | |
1689 | NULL, | |
1690 | }; | |
1691 | ||
e7ea9825 | 1692 | static const struct attribute_group pci_dev_hp_attr_group = { |
dfab88be JL |
1693 | .attrs = pci_dev_hp_attrs, |
1694 | .is_visible = pci_dev_hp_attrs_are_visible, | |
1695 | }; | |
1696 | ||
1789382a DD |
1697 | #ifdef CONFIG_PCI_IOV |
1698 | static struct attribute *sriov_dev_attrs[] = { | |
1699 | &sriov_totalvfs_attr.attr, | |
1700 | &sriov_numvfs_attr.attr, | |
7dfca152 FS |
1701 | &sriov_offset_attr.attr, |
1702 | &sriov_stride_attr.attr, | |
1703 | &sriov_vf_device_attr.attr, | |
0e7df224 | 1704 | &sriov_drivers_autoprobe_attr.attr, |
1789382a DD |
1705 | NULL, |
1706 | }; | |
1707 | ||
1708 | static umode_t sriov_attrs_are_visible(struct kobject *kobj, | |
3c78bc61 | 1709 | struct attribute *a, int n) |
1789382a | 1710 | { |
554a6037 | 1711 | struct device *dev = kobj_to_dev(kobj); |
1789382a DD |
1712 | |
1713 | if (!dev_is_pf(dev)) | |
1714 | return 0; | |
1715 | ||
1716 | return a->mode; | |
1717 | } | |
1718 | ||
e7ea9825 | 1719 | static const struct attribute_group sriov_dev_attr_group = { |
1789382a DD |
1720 | .attrs = sriov_dev_attrs, |
1721 | .is_visible = sriov_attrs_are_visible, | |
1722 | }; | |
1723 | #endif /* CONFIG_PCI_IOV */ | |
1724 | ||
e7ea9825 | 1725 | static const struct attribute_group pci_dev_attr_group = { |
4e15c46b YL |
1726 | .attrs = pci_dev_dev_attrs, |
1727 | .is_visible = pci_dev_attrs_are_visible, | |
1728 | }; | |
1729 | ||
e7ea9825 | 1730 | static const struct attribute_group pci_bridge_attr_group = { |
56c1af46 WVK |
1731 | .attrs = pci_bridge_attrs, |
1732 | .is_visible = pci_bridge_attrs_are_visible, | |
1733 | }; | |
1734 | ||
e7ea9825 | 1735 | static const struct attribute_group pcie_dev_attr_group = { |
56c1af46 WVK |
1736 | .attrs = pcie_dev_attrs, |
1737 | .is_visible = pcie_dev_attrs_are_visible, | |
1738 | }; | |
1739 | ||
4e15c46b YL |
1740 | static const struct attribute_group *pci_dev_attr_groups[] = { |
1741 | &pci_dev_attr_group, | |
dfab88be | 1742 | &pci_dev_hp_attr_group, |
1789382a DD |
1743 | #ifdef CONFIG_PCI_IOV |
1744 | &sriov_dev_attr_group, | |
1745 | #endif | |
56c1af46 WVK |
1746 | &pci_bridge_attr_group, |
1747 | &pcie_dev_attr_group, | |
81aa5206 RJ |
1748 | #ifdef CONFIG_PCIEAER |
1749 | &aer_stats_attr_group, | |
1750 | #endif | |
4e15c46b YL |
1751 | NULL, |
1752 | }; | |
1753 | ||
69f2dc24 | 1754 | const struct device_type pci_dev_type = { |
4e15c46b YL |
1755 | .groups = pci_dev_attr_groups, |
1756 | }; |