Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * drivers/pci/pci-sysfs.c | |
3 | * | |
4 | * (C) Copyright 2002-2004 Greg Kroah-Hartman <greg@kroah.com> | |
5 | * (C) Copyright 2002-2004 IBM Corp. | |
6 | * (C) Copyright 2003 Matthew Wilcox | |
7 | * (C) Copyright 2003 Hewlett-Packard | |
8 | * (C) Copyright 2004 Jon Smirl <jonsmirl@yahoo.com> | |
9 | * (C) Copyright 2004 Silicon Graphics, Inc. Jesse Barnes <jbarnes@sgi.com> | |
10 | * | |
11 | * File attributes for PCI devices | |
12 | * | |
13 | * Modeled after usb's driverfs.c | |
14 | * | |
15 | */ | |
16 | ||
17 | ||
1da177e4 | 18 | #include <linux/kernel.h> |
b5ff7df3 | 19 | #include <linux/sched.h> |
1da177e4 LT |
20 | #include <linux/pci.h> |
21 | #include <linux/stat.h> | |
363c75db | 22 | #include <linux/export.h> |
1da177e4 LT |
23 | #include <linux/topology.h> |
24 | #include <linux/mm.h> | |
de139a33 | 25 | #include <linux/fs.h> |
aa0ac365 | 26 | #include <linux/capability.h> |
a628e7b8 | 27 | #include <linux/security.h> |
7d715a6c | 28 | #include <linux/pci-aspm.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
1a39b310 | 30 | #include <linux/vgaarb.h> |
448bd857 | 31 | #include <linux/pm_runtime.h> |
1da177e4 LT |
32 | #include "pci.h" |
33 | ||
34 | static int sysfs_initialized; /* = 0 */ | |
35 | ||
36 | /* show configuration fields */ | |
37 | #define pci_config_attr(field, format_string) \ | |
38 | static ssize_t \ | |
e404e274 | 39 | field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
40 | { \ |
41 | struct pci_dev *pdev; \ | |
42 | \ | |
43 | pdev = to_pci_dev (dev); \ | |
44 | return sprintf (buf, format_string, pdev->field); \ | |
45 | } | |
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"); | |
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); | |
59 | return sprintf (buf, "%u\n", pdev->broken_parity_status); | |
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 | |
92425a40 TP |
69 | if (strict_strtoul(buf, 0, &val) < 0) |
70 | return -EINVAL; | |
71 | ||
72 | pdev->broken_parity_status = !!val; | |
73 | ||
74 | return count; | |
bdee9d98 DT |
75 | } |
76 | ||
4327edf6 AC |
77 | static ssize_t local_cpus_show(struct device *dev, |
78 | struct device_attribute *attr, char *buf) | |
1da177e4 | 79 | { |
3be83050 | 80 | const struct cpumask *mask; |
4327edf6 AC |
81 | int len; |
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 |
3be83050 | 89 | len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask); |
39106dcf MT |
90 | buf[len++] = '\n'; |
91 | buf[len] = '\0'; | |
92 | return len; | |
93 | } | |
94 | ||
95 | ||
96 | static ssize_t local_cpulist_show(struct device *dev, | |
97 | struct device_attribute *attr, char *buf) | |
98 | { | |
3be83050 | 99 | const struct cpumask *mask; |
39106dcf MT |
100 | int len; |
101 | ||
e0cd5160 | 102 | #ifdef CONFIG_NUMA |
6be954d1 DJ |
103 | mask = (dev_to_node(dev) == -1) ? cpu_online_mask : |
104 | cpumask_of_node(dev_to_node(dev)); | |
e0cd5160 | 105 | #else |
3be83050 | 106 | mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); |
e0cd5160 | 107 | #endif |
3be83050 | 108 | len = cpulist_scnprintf(buf, PAGE_SIZE-2, mask); |
39106dcf MT |
109 | buf[len++] = '\n'; |
110 | buf[len] = '\0'; | |
111 | return len; | |
1da177e4 LT |
112 | } |
113 | ||
dc2c2c9d YL |
114 | /* |
115 | * PCI Bus Class Devices | |
116 | */ | |
117 | static ssize_t pci_bus_show_cpuaffinity(struct device *dev, | |
118 | int type, | |
119 | struct device_attribute *attr, | |
120 | char *buf) | |
121 | { | |
122 | int ret; | |
123 | const struct cpumask *cpumask; | |
124 | ||
125 | cpumask = cpumask_of_pcibus(to_pci_bus(dev)); | |
126 | ret = type ? | |
127 | cpulist_scnprintf(buf, PAGE_SIZE-2, cpumask) : | |
128 | cpumask_scnprintf(buf, PAGE_SIZE-2, cpumask); | |
129 | buf[ret++] = '\n'; | |
130 | buf[ret] = '\0'; | |
131 | return ret; | |
132 | } | |
133 | ||
134 | static inline ssize_t pci_bus_show_cpumaskaffinity(struct device *dev, | |
135 | struct device_attribute *attr, | |
136 | char *buf) | |
137 | { | |
138 | return pci_bus_show_cpuaffinity(dev, 0, attr, buf); | |
139 | } | |
140 | ||
141 | static inline ssize_t pci_bus_show_cpulistaffinity(struct device *dev, | |
142 | struct device_attribute *attr, | |
143 | char *buf) | |
144 | { | |
145 | return pci_bus_show_cpuaffinity(dev, 1, attr, buf); | |
146 | } | |
147 | ||
1da177e4 LT |
148 | /* show resources */ |
149 | static ssize_t | |
e404e274 | 150 | resource_show(struct device * dev, struct device_attribute *attr, char * buf) |
1da177e4 LT |
151 | { |
152 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
153 | char * str = buf; | |
154 | int i; | |
fde09c6d | 155 | int max; |
e31dd6e4 | 156 | resource_size_t start, end; |
1da177e4 LT |
157 | |
158 | if (pci_dev->subordinate) | |
159 | max = DEVICE_COUNT_RESOURCE; | |
fde09c6d YZ |
160 | else |
161 | max = PCI_BRIDGE_RESOURCES; | |
1da177e4 LT |
162 | |
163 | for (i = 0; i < max; i++) { | |
2311b1f2 ME |
164 | struct resource *res = &pci_dev->resource[i]; |
165 | pci_resource_to_user(pci_dev, i, res, &start, &end); | |
166 | str += sprintf(str,"0x%016llx 0x%016llx 0x%016llx\n", | |
167 | (unsigned long long)start, | |
168 | (unsigned long long)end, | |
169 | (unsigned long long)res->flags); | |
1da177e4 LT |
170 | } |
171 | return (str - buf); | |
172 | } | |
173 | ||
87c8a443 | 174 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) |
9888549e GK |
175 | { |
176 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
177 | ||
178 | return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n", | |
179 | pci_dev->vendor, pci_dev->device, | |
180 | pci_dev->subsystem_vendor, pci_dev->subsystem_device, | |
181 | (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8), | |
182 | (u8)(pci_dev->class)); | |
183 | } | |
bae94d02 IPG |
184 | |
185 | static ssize_t is_enabled_store(struct device *dev, | |
186 | struct device_attribute *attr, const char *buf, | |
187 | size_t count) | |
9f125d30 AV |
188 | { |
189 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 TP |
190 | unsigned long val; |
191 | ssize_t result = strict_strtoul(buf, 0, &val); | |
192 | ||
193 | if (result < 0) | |
194 | return result; | |
9f125d30 AV |
195 | |
196 | /* this can crash the machine when done on the "wrong" device */ | |
197 | if (!capable(CAP_SYS_ADMIN)) | |
92425a40 | 198 | return -EPERM; |
9f125d30 | 199 | |
92425a40 | 200 | if (!val) { |
296ccb08 | 201 | if (pci_is_enabled(pdev)) |
bae94d02 IPG |
202 | pci_disable_device(pdev); |
203 | else | |
204 | result = -EIO; | |
92425a40 | 205 | } else |
bae94d02 | 206 | result = pci_enable_device(pdev); |
9f125d30 | 207 | |
bae94d02 IPG |
208 | return result < 0 ? result : count; |
209 | } | |
210 | ||
211 | static ssize_t is_enabled_show(struct device *dev, | |
212 | struct device_attribute *attr, char *buf) | |
213 | { | |
214 | struct pci_dev *pdev; | |
9f125d30 | 215 | |
bae94d02 IPG |
216 | pdev = to_pci_dev (dev); |
217 | return sprintf (buf, "%u\n", atomic_read(&pdev->enable_cnt)); | |
9f125d30 AV |
218 | } |
219 | ||
81bb0e19 BG |
220 | #ifdef CONFIG_NUMA |
221 | static ssize_t | |
222 | numa_node_show(struct device *dev, struct device_attribute *attr, char *buf) | |
223 | { | |
224 | return sprintf (buf, "%d\n", dev->numa_node); | |
225 | } | |
226 | #endif | |
227 | ||
bb965401 YL |
228 | static ssize_t |
229 | dma_mask_bits_show(struct device *dev, struct device_attribute *attr, char *buf) | |
230 | { | |
231 | struct pci_dev *pdev = to_pci_dev(dev); | |
232 | ||
233 | return sprintf (buf, "%d\n", fls64(pdev->dma_mask)); | |
234 | } | |
235 | ||
236 | static ssize_t | |
237 | consistent_dma_mask_bits_show(struct device *dev, struct device_attribute *attr, | |
238 | char *buf) | |
239 | { | |
240 | return sprintf (buf, "%d\n", fls64(dev->coherent_dma_mask)); | |
241 | } | |
242 | ||
fe97064c BG |
243 | static ssize_t |
244 | msi_bus_show(struct device *dev, struct device_attribute *attr, char *buf) | |
245 | { | |
246 | struct pci_dev *pdev = to_pci_dev(dev); | |
247 | ||
248 | if (!pdev->subordinate) | |
249 | return 0; | |
250 | ||
251 | return sprintf (buf, "%u\n", | |
252 | !(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI)); | |
253 | } | |
254 | ||
255 | static ssize_t | |
256 | msi_bus_store(struct device *dev, struct device_attribute *attr, | |
257 | const char *buf, size_t count) | |
258 | { | |
259 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 TP |
260 | unsigned long val; |
261 | ||
262 | if (strict_strtoul(buf, 0, &val) < 0) | |
263 | return -EINVAL; | |
fe97064c BG |
264 | |
265 | /* bad things may happen if the no_msi flag is changed | |
266 | * while some drivers are loaded */ | |
267 | if (!capable(CAP_SYS_ADMIN)) | |
92425a40 | 268 | return -EPERM; |
fe97064c | 269 | |
92425a40 TP |
270 | /* Maybe pci devices without subordinate busses shouldn't even have this |
271 | * attribute in the first place? */ | |
fe97064c BG |
272 | if (!pdev->subordinate) |
273 | return count; | |
274 | ||
92425a40 TP |
275 | /* Is the flag going to change, or keep the value it already had? */ |
276 | if (!(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) ^ | |
277 | !!val) { | |
278 | pdev->subordinate->bus_flags ^= PCI_BUS_FLAGS_NO_MSI; | |
fe97064c | 279 | |
92425a40 TP |
280 | dev_warn(&pdev->dev, "forced subordinate bus to%s support MSI," |
281 | " bad things could happen\n", val ? "" : " not"); | |
fe97064c BG |
282 | } |
283 | ||
284 | return count; | |
285 | } | |
9888549e | 286 | |
705b1aaa AC |
287 | #ifdef CONFIG_HOTPLUG |
288 | static DEFINE_MUTEX(pci_remove_rescan_mutex); | |
289 | static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf, | |
290 | size_t count) | |
291 | { | |
292 | unsigned long val; | |
293 | struct pci_bus *b = NULL; | |
294 | ||
295 | if (strict_strtoul(buf, 0, &val) < 0) | |
296 | return -EINVAL; | |
297 | ||
298 | if (val) { | |
299 | mutex_lock(&pci_remove_rescan_mutex); | |
300 | while ((b = pci_find_next_bus(b)) != NULL) | |
301 | pci_rescan_bus(b); | |
302 | mutex_unlock(&pci_remove_rescan_mutex); | |
303 | } | |
304 | return count; | |
305 | } | |
306 | ||
307 | struct bus_attribute pci_bus_attrs[] = { | |
308 | __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store), | |
309 | __ATTR_NULL | |
310 | }; | |
77c27c7b | 311 | |
738a6396 AC |
312 | static ssize_t |
313 | dev_rescan_store(struct device *dev, struct device_attribute *attr, | |
314 | const char *buf, size_t count) | |
315 | { | |
316 | unsigned long val; | |
317 | struct pci_dev *pdev = to_pci_dev(dev); | |
318 | ||
319 | if (strict_strtoul(buf, 0, &val) < 0) | |
320 | return -EINVAL; | |
321 | ||
322 | if (val) { | |
323 | mutex_lock(&pci_remove_rescan_mutex); | |
324 | pci_rescan_bus(pdev->bus); | |
325 | mutex_unlock(&pci_remove_rescan_mutex); | |
326 | } | |
327 | return count; | |
328 | } | |
329 | ||
77c27c7b AC |
330 | static void remove_callback(struct device *dev) |
331 | { | |
332 | struct pci_dev *pdev = to_pci_dev(dev); | |
333 | ||
334 | mutex_lock(&pci_remove_rescan_mutex); | |
210647af | 335 | pci_stop_and_remove_bus_device(pdev); |
77c27c7b AC |
336 | mutex_unlock(&pci_remove_rescan_mutex); |
337 | } | |
338 | ||
339 | static ssize_t | |
340 | remove_store(struct device *dev, struct device_attribute *dummy, | |
341 | const char *buf, size_t count) | |
342 | { | |
343 | int ret = 0; | |
344 | unsigned long val; | |
77c27c7b AC |
345 | |
346 | if (strict_strtoul(buf, 0, &val) < 0) | |
347 | return -EINVAL; | |
348 | ||
77c27c7b AC |
349 | /* An attribute cannot be unregistered by one of its own methods, |
350 | * so we have to use this roundabout approach. | |
351 | */ | |
352 | if (val) | |
353 | ret = device_schedule_callback(dev, remove_callback); | |
354 | if (ret) | |
355 | count = ret; | |
356 | return count; | |
357 | } | |
b9d320fc YL |
358 | |
359 | static ssize_t | |
360 | dev_bus_rescan_store(struct device *dev, struct device_attribute *attr, | |
361 | const char *buf, size_t count) | |
362 | { | |
363 | unsigned long val; | |
364 | struct pci_bus *bus = to_pci_bus(dev); | |
365 | ||
366 | if (strict_strtoul(buf, 0, &val) < 0) | |
367 | return -EINVAL; | |
368 | ||
369 | if (val) { | |
370 | mutex_lock(&pci_remove_rescan_mutex); | |
2f320521 YL |
371 | if (!pci_is_root_bus(bus) && list_empty(&bus->devices)) |
372 | pci_rescan_bus_bridge_resize(bus->self); | |
373 | else | |
374 | pci_rescan_bus(bus); | |
b9d320fc YL |
375 | mutex_unlock(&pci_remove_rescan_mutex); |
376 | } | |
377 | return count; | |
378 | } | |
379 | ||
705b1aaa AC |
380 | #endif |
381 | ||
448bd857 HY |
382 | #if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI) |
383 | static ssize_t d3cold_allowed_store(struct device *dev, | |
384 | struct device_attribute *attr, | |
385 | const char *buf, size_t count) | |
386 | { | |
387 | struct pci_dev *pdev = to_pci_dev(dev); | |
388 | unsigned long val; | |
389 | ||
390 | if (strict_strtoul(buf, 0, &val) < 0) | |
391 | return -EINVAL; | |
392 | ||
393 | pdev->d3cold_allowed = !!val; | |
394 | pm_runtime_resume(dev); | |
395 | ||
396 | return count; | |
397 | } | |
398 | ||
399 | static ssize_t d3cold_allowed_show(struct device *dev, | |
400 | struct device_attribute *attr, char *buf) | |
401 | { | |
402 | struct pci_dev *pdev = to_pci_dev(dev); | |
403 | return sprintf (buf, "%u\n", pdev->d3cold_allowed); | |
404 | } | |
405 | #endif | |
406 | ||
1da177e4 LT |
407 | struct device_attribute pci_dev_attrs[] = { |
408 | __ATTR_RO(resource), | |
409 | __ATTR_RO(vendor), | |
410 | __ATTR_RO(device), | |
411 | __ATTR_RO(subsystem_vendor), | |
412 | __ATTR_RO(subsystem_device), | |
413 | __ATTR_RO(class), | |
414 | __ATTR_RO(irq), | |
415 | __ATTR_RO(local_cpus), | |
39106dcf | 416 | __ATTR_RO(local_cpulist), |
9888549e | 417 | __ATTR_RO(modalias), |
81bb0e19 BG |
418 | #ifdef CONFIG_NUMA |
419 | __ATTR_RO(numa_node), | |
420 | #endif | |
bb965401 YL |
421 | __ATTR_RO(dma_mask_bits), |
422 | __ATTR_RO(consistent_dma_mask_bits), | |
9f125d30 | 423 | __ATTR(enable, 0600, is_enabled_show, is_enabled_store), |
bdee9d98 DT |
424 | __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR), |
425 | broken_parity_status_show,broken_parity_status_store), | |
fe97064c | 426 | __ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store), |
77c27c7b AC |
427 | #ifdef CONFIG_HOTPLUG |
428 | __ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store), | |
738a6396 | 429 | __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store), |
448bd857 HY |
430 | #endif |
431 | #if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI) | |
432 | __ATTR(d3cold_allowed, 0644, d3cold_allowed_show, d3cold_allowed_store), | |
77c27c7b | 433 | #endif |
1da177e4 LT |
434 | __ATTR_NULL, |
435 | }; | |
436 | ||
b9d320fc YL |
437 | struct device_attribute pcibus_dev_attrs[] = { |
438 | #ifdef CONFIG_HOTPLUG | |
439 | __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store), | |
440 | #endif | |
dc2c2c9d YL |
441 | __ATTR(cpuaffinity, S_IRUGO, pci_bus_show_cpumaskaffinity, NULL), |
442 | __ATTR(cpulistaffinity, S_IRUGO, pci_bus_show_cpulistaffinity, NULL), | |
b9d320fc YL |
443 | __ATTR_NULL, |
444 | }; | |
445 | ||
217f45de DA |
446 | static ssize_t |
447 | boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf) | |
448 | { | |
449 | struct pci_dev *pdev = to_pci_dev(dev); | |
1a39b310 MG |
450 | struct pci_dev *vga_dev = vga_default_device(); |
451 | ||
452 | if (vga_dev) | |
453 | return sprintf(buf, "%u\n", (pdev == vga_dev)); | |
217f45de DA |
454 | |
455 | return sprintf(buf, "%u\n", | |
456 | !!(pdev->resource[PCI_ROM_RESOURCE].flags & | |
457 | IORESOURCE_ROM_SHADOW)); | |
458 | } | |
459 | struct device_attribute vga_attr = __ATTR_RO(boot_vga); | |
460 | ||
1da177e4 | 461 | static ssize_t |
2c3c8bea CW |
462 | pci_read_config(struct file *filp, struct kobject *kobj, |
463 | struct bin_attribute *bin_attr, | |
91a69029 | 464 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
465 | { |
466 | struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); | |
467 | unsigned int size = 64; | |
468 | loff_t init_off = off; | |
4c0619ad | 469 | u8 *data = (u8*) buf; |
1da177e4 LT |
470 | |
471 | /* Several chips lock up trying to read undefined config space */ | |
b7e724d3 | 472 | if (security_capable(filp->f_cred, &init_user_ns, CAP_SYS_ADMIN) == 0) { |
1da177e4 LT |
473 | size = dev->cfg_size; |
474 | } else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { | |
475 | size = 128; | |
476 | } | |
477 | ||
478 | if (off > size) | |
479 | return 0; | |
480 | if (off + count > size) { | |
481 | size -= off; | |
482 | count = size; | |
483 | } else { | |
484 | size = count; | |
485 | } | |
486 | ||
4c0619ad | 487 | if ((off & 1) && size) { |
488 | u8 val; | |
e04b0ea2 | 489 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 490 | data[off - init_off] = val; |
1da177e4 | 491 | off++; |
4c0619ad | 492 | size--; |
493 | } | |
494 | ||
495 | if ((off & 3) && size > 2) { | |
496 | u16 val; | |
e04b0ea2 | 497 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 498 | data[off - init_off] = val & 0xff; |
499 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
500 | off += 2; | |
501 | size -= 2; | |
1da177e4 LT |
502 | } |
503 | ||
504 | while (size > 3) { | |
4c0619ad | 505 | u32 val; |
e04b0ea2 | 506 | pci_user_read_config_dword(dev, off, &val); |
4c0619ad | 507 | data[off - init_off] = val & 0xff; |
508 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
509 | data[off - init_off + 2] = (val >> 16) & 0xff; | |
510 | data[off - init_off + 3] = (val >> 24) & 0xff; | |
1da177e4 LT |
511 | off += 4; |
512 | size -= 4; | |
513 | } | |
514 | ||
4c0619ad | 515 | if (size >= 2) { |
516 | u16 val; | |
e04b0ea2 | 517 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 518 | data[off - init_off] = val & 0xff; |
519 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
520 | off += 2; | |
521 | size -= 2; | |
522 | } | |
523 | ||
524 | if (size > 0) { | |
525 | u8 val; | |
e04b0ea2 | 526 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 527 | data[off - init_off] = val; |
1da177e4 LT |
528 | off++; |
529 | --size; | |
530 | } | |
531 | ||
532 | return count; | |
533 | } | |
534 | ||
535 | static ssize_t | |
2c3c8bea CW |
536 | pci_write_config(struct file* filp, struct kobject *kobj, |
537 | struct bin_attribute *bin_attr, | |
91a69029 | 538 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
539 | { |
540 | struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); | |
541 | unsigned int size = count; | |
542 | loff_t init_off = off; | |
4c0619ad | 543 | u8 *data = (u8*) buf; |
1da177e4 LT |
544 | |
545 | if (off > dev->cfg_size) | |
546 | return 0; | |
547 | if (off + count > dev->cfg_size) { | |
548 | size = dev->cfg_size - off; | |
549 | count = size; | |
550 | } | |
4c0619ad | 551 | |
552 | if ((off & 1) && size) { | |
e04b0ea2 | 553 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 | 554 | off++; |
4c0619ad | 555 | size--; |
1da177e4 | 556 | } |
4c0619ad | 557 | |
558 | if ((off & 3) && size > 2) { | |
559 | u16 val = data[off - init_off]; | |
560 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 561 | pci_user_write_config_word(dev, off, val); |
4c0619ad | 562 | off += 2; |
563 | size -= 2; | |
564 | } | |
1da177e4 LT |
565 | |
566 | while (size > 3) { | |
4c0619ad | 567 | u32 val = data[off - init_off]; |
568 | val |= (u32) data[off - init_off + 1] << 8; | |
569 | val |= (u32) data[off - init_off + 2] << 16; | |
570 | val |= (u32) data[off - init_off + 3] << 24; | |
e04b0ea2 | 571 | pci_user_write_config_dword(dev, off, val); |
1da177e4 LT |
572 | off += 4; |
573 | size -= 4; | |
574 | } | |
4c0619ad | 575 | |
576 | if (size >= 2) { | |
577 | u16 val = data[off - init_off]; | |
578 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 579 | pci_user_write_config_word(dev, off, val); |
4c0619ad | 580 | off += 2; |
581 | size -= 2; | |
582 | } | |
1da177e4 | 583 | |
4c0619ad | 584 | if (size) { |
e04b0ea2 | 585 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 LT |
586 | off++; |
587 | --size; | |
588 | } | |
589 | ||
590 | return count; | |
591 | } | |
592 | ||
94e61088 | 593 | static ssize_t |
2c3c8bea CW |
594 | read_vpd_attr(struct file *filp, struct kobject *kobj, |
595 | struct bin_attribute *bin_attr, | |
287d19ce | 596 | char *buf, loff_t off, size_t count) |
94e61088 BH |
597 | { |
598 | struct pci_dev *dev = | |
599 | to_pci_dev(container_of(kobj, struct device, kobj)); | |
94e61088 BH |
600 | |
601 | if (off > bin_attr->size) | |
602 | count = 0; | |
603 | else if (count > bin_attr->size - off) | |
604 | count = bin_attr->size - off; | |
94e61088 | 605 | |
287d19ce | 606 | return pci_read_vpd(dev, off, count, buf); |
94e61088 BH |
607 | } |
608 | ||
609 | static ssize_t | |
2c3c8bea CW |
610 | write_vpd_attr(struct file *filp, struct kobject *kobj, |
611 | struct bin_attribute *bin_attr, | |
287d19ce | 612 | char *buf, loff_t off, size_t count) |
94e61088 BH |
613 | { |
614 | struct pci_dev *dev = | |
615 | to_pci_dev(container_of(kobj, struct device, kobj)); | |
94e61088 BH |
616 | |
617 | if (off > bin_attr->size) | |
618 | count = 0; | |
619 | else if (count > bin_attr->size - off) | |
620 | count = bin_attr->size - off; | |
94e61088 | 621 | |
287d19ce | 622 | return pci_write_vpd(dev, off, count, buf); |
94e61088 BH |
623 | } |
624 | ||
1da177e4 LT |
625 | #ifdef HAVE_PCI_LEGACY |
626 | /** | |
627 | * pci_read_legacy_io - read byte(s) from legacy I/O port space | |
2c3c8bea | 628 | * @filp: open sysfs file |
1da177e4 | 629 | * @kobj: kobject corresponding to file to read from |
cffb2faf | 630 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
631 | * @buf: buffer to store results |
632 | * @off: offset into legacy I/O port space | |
633 | * @count: number of bytes to read | |
634 | * | |
635 | * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
636 | * callback routine (pci_legacy_read). | |
637 | */ | |
f19aeb1f | 638 | static ssize_t |
2c3c8bea CW |
639 | pci_read_legacy_io(struct file *filp, struct kobject *kobj, |
640 | struct bin_attribute *bin_attr, | |
91a69029 | 641 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
642 | { |
643 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 644 | struct device, |
1da177e4 LT |
645 | kobj)); |
646 | ||
647 | /* Only support 1, 2 or 4 byte accesses */ | |
648 | if (count != 1 && count != 2 && count != 4) | |
649 | return -EINVAL; | |
650 | ||
651 | return pci_legacy_read(bus, off, (u32 *)buf, count); | |
652 | } | |
653 | ||
654 | /** | |
655 | * pci_write_legacy_io - write byte(s) to legacy I/O port space | |
2c3c8bea | 656 | * @filp: open sysfs file |
1da177e4 | 657 | * @kobj: kobject corresponding to file to read from |
cffb2faf | 658 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
659 | * @buf: buffer containing value to be written |
660 | * @off: offset into legacy I/O port space | |
661 | * @count: number of bytes to write | |
662 | * | |
663 | * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
664 | * callback routine (pci_legacy_write). | |
665 | */ | |
f19aeb1f | 666 | static ssize_t |
2c3c8bea CW |
667 | pci_write_legacy_io(struct file *filp, struct kobject *kobj, |
668 | struct bin_attribute *bin_attr, | |
91a69029 | 669 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
670 | { |
671 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 672 | struct device, |
1da177e4 LT |
673 | kobj)); |
674 | /* Only support 1, 2 or 4 byte accesses */ | |
675 | if (count != 1 && count != 2 && count != 4) | |
676 | return -EINVAL; | |
677 | ||
678 | return pci_legacy_write(bus, off, *(u32 *)buf, count); | |
679 | } | |
680 | ||
681 | /** | |
682 | * pci_mmap_legacy_mem - map legacy PCI memory into user memory space | |
2c3c8bea | 683 | * @filp: open sysfs file |
1da177e4 LT |
684 | * @kobj: kobject corresponding to device to be mapped |
685 | * @attr: struct bin_attribute for this file | |
686 | * @vma: struct vm_area_struct passed to mmap | |
687 | * | |
f19aeb1f | 688 | * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap |
1da177e4 LT |
689 | * legacy memory space (first meg of bus space) into application virtual |
690 | * memory space. | |
691 | */ | |
f19aeb1f | 692 | static int |
2c3c8bea CW |
693 | pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj, |
694 | struct bin_attribute *attr, | |
1da177e4 LT |
695 | struct vm_area_struct *vma) |
696 | { | |
697 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 698 | struct device, |
1da177e4 LT |
699 | kobj)); |
700 | ||
f19aeb1f BH |
701 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem); |
702 | } | |
703 | ||
704 | /** | |
705 | * pci_mmap_legacy_io - map legacy PCI IO into user memory space | |
2c3c8bea | 706 | * @filp: open sysfs file |
f19aeb1f BH |
707 | * @kobj: kobject corresponding to device to be mapped |
708 | * @attr: struct bin_attribute for this file | |
709 | * @vma: struct vm_area_struct passed to mmap | |
710 | * | |
711 | * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap | |
712 | * legacy IO space (first meg of bus space) into application virtual | |
713 | * memory space. Returns -ENOSYS if the operation isn't supported | |
714 | */ | |
715 | static int | |
2c3c8bea CW |
716 | pci_mmap_legacy_io(struct file *filp, struct kobject *kobj, |
717 | struct bin_attribute *attr, | |
f19aeb1f BH |
718 | struct vm_area_struct *vma) |
719 | { | |
720 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
721 | struct device, | |
722 | kobj)); | |
723 | ||
724 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io); | |
725 | } | |
726 | ||
10a0ef39 IK |
727 | /** |
728 | * pci_adjust_legacy_attr - adjustment of legacy file attributes | |
729 | * @b: bus to create files under | |
730 | * @mmap_type: I/O port or memory | |
731 | * | |
732 | * Stub implementation. Can be overridden by arch if necessary. | |
733 | */ | |
734 | void __weak | |
735 | pci_adjust_legacy_attr(struct pci_bus *b, enum pci_mmap_state mmap_type) | |
736 | { | |
737 | return; | |
738 | } | |
739 | ||
f19aeb1f BH |
740 | /** |
741 | * pci_create_legacy_files - create legacy I/O port and memory files | |
742 | * @b: bus to create files under | |
743 | * | |
744 | * Some platforms allow access to legacy I/O port and ISA memory space on | |
745 | * a per-bus basis. This routine creates the files and ties them into | |
746 | * their associated read, write and mmap files from pci-sysfs.c | |
747 | * | |
25985edc | 748 | * On error unwind, but don't propagate the error to the caller |
f19aeb1f BH |
749 | * as it is ok to set up the PCI bus without these files. |
750 | */ | |
751 | void pci_create_legacy_files(struct pci_bus *b) | |
752 | { | |
753 | int error; | |
754 | ||
755 | b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2, | |
756 | GFP_ATOMIC); | |
757 | if (!b->legacy_io) | |
758 | goto kzalloc_err; | |
759 | ||
62e877b8 | 760 | sysfs_bin_attr_init(b->legacy_io); |
f19aeb1f BH |
761 | b->legacy_io->attr.name = "legacy_io"; |
762 | b->legacy_io->size = 0xffff; | |
763 | b->legacy_io->attr.mode = S_IRUSR | S_IWUSR; | |
764 | b->legacy_io->read = pci_read_legacy_io; | |
765 | b->legacy_io->write = pci_write_legacy_io; | |
766 | b->legacy_io->mmap = pci_mmap_legacy_io; | |
10a0ef39 | 767 | pci_adjust_legacy_attr(b, pci_mmap_io); |
f19aeb1f BH |
768 | error = device_create_bin_file(&b->dev, b->legacy_io); |
769 | if (error) | |
770 | goto legacy_io_err; | |
771 | ||
772 | /* Allocated above after the legacy_io struct */ | |
773 | b->legacy_mem = b->legacy_io + 1; | |
6757eca3 | 774 | sysfs_bin_attr_init(b->legacy_mem); |
f19aeb1f BH |
775 | b->legacy_mem->attr.name = "legacy_mem"; |
776 | b->legacy_mem->size = 1024*1024; | |
777 | b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR; | |
778 | b->legacy_mem->mmap = pci_mmap_legacy_mem; | |
10a0ef39 | 779 | pci_adjust_legacy_attr(b, pci_mmap_mem); |
f19aeb1f BH |
780 | error = device_create_bin_file(&b->dev, b->legacy_mem); |
781 | if (error) | |
782 | goto legacy_mem_err; | |
783 | ||
784 | return; | |
785 | ||
786 | legacy_mem_err: | |
787 | device_remove_bin_file(&b->dev, b->legacy_io); | |
788 | legacy_io_err: | |
789 | kfree(b->legacy_io); | |
790 | b->legacy_io = NULL; | |
791 | kzalloc_err: | |
792 | printk(KERN_WARNING "pci: warning: could not create legacy I/O port " | |
793 | "and ISA memory resources to sysfs\n"); | |
794 | return; | |
795 | } | |
796 | ||
797 | void pci_remove_legacy_files(struct pci_bus *b) | |
798 | { | |
799 | if (b->legacy_io) { | |
800 | device_remove_bin_file(&b->dev, b->legacy_io); | |
801 | device_remove_bin_file(&b->dev, b->legacy_mem); | |
802 | kfree(b->legacy_io); /* both are allocated here */ | |
803 | } | |
1da177e4 LT |
804 | } |
805 | #endif /* HAVE_PCI_LEGACY */ | |
806 | ||
807 | #ifdef HAVE_PCI_MMAP | |
b5ff7df3 | 808 | |
3b519e4e MW |
809 | int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma, |
810 | enum pci_mmap_api mmap_api) | |
b5ff7df3 | 811 | { |
3b519e4e | 812 | unsigned long nr, start, size, pci_start; |
b5ff7df3 | 813 | |
3b519e4e MW |
814 | if (pci_resource_len(pdev, resno) == 0) |
815 | return 0; | |
b5ff7df3 LT |
816 | nr = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; |
817 | start = vma->vm_pgoff; | |
88e7df0b | 818 | size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1; |
8c05cd08 | 819 | pci_start = (mmap_api == PCI_MMAP_PROCFS) ? |
3b519e4e MW |
820 | pci_resource_start(pdev, resno) >> PAGE_SHIFT : 0; |
821 | if (start >= pci_start && start < pci_start + size && | |
822 | start + nr <= pci_start + size) | |
b5ff7df3 | 823 | return 1; |
b5ff7df3 LT |
824 | return 0; |
825 | } | |
826 | ||
1da177e4 LT |
827 | /** |
828 | * pci_mmap_resource - map a PCI resource into user memory space | |
829 | * @kobj: kobject for mapping | |
830 | * @attr: struct bin_attribute for the file being mapped | |
831 | * @vma: struct vm_area_struct passed into the mmap | |
45aec1ae | 832 | * @write_combine: 1 for write_combine mapping |
1da177e4 LT |
833 | * |
834 | * Use the regular PCI mapping routines to map a PCI resource into userspace. | |
1da177e4 LT |
835 | */ |
836 | static int | |
837 | pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr, | |
45aec1ae | 838 | struct vm_area_struct *vma, int write_combine) |
1da177e4 LT |
839 | { |
840 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, | |
841 | struct device, kobj)); | |
a3f5835a | 842 | struct resource *res = attr->private; |
1da177e4 | 843 | enum pci_mmap_state mmap_type; |
e31dd6e4 | 844 | resource_size_t start, end; |
2311b1f2 | 845 | int i; |
1da177e4 | 846 | |
2311b1f2 ME |
847 | for (i = 0; i < PCI_ROM_RESOURCE; i++) |
848 | if (res == &pdev->resource[i]) | |
849 | break; | |
850 | if (i >= PCI_ROM_RESOURCE) | |
851 | return -ENODEV; | |
852 | ||
3b519e4e MW |
853 | if (!pci_mmap_fits(pdev, i, vma, PCI_MMAP_SYSFS)) { |
854 | WARN(1, "process \"%s\" tried to map 0x%08lx bytes " | |
855 | "at page 0x%08lx on %s BAR %d (start 0x%16Lx, size 0x%16Lx)\n", | |
856 | current->comm, vma->vm_end-vma->vm_start, vma->vm_pgoff, | |
857 | pci_name(pdev), i, | |
e25cd062 RD |
858 | (u64)pci_resource_start(pdev, i), |
859 | (u64)pci_resource_len(pdev, i)); | |
b5ff7df3 | 860 | return -EINVAL; |
3b519e4e | 861 | } |
b5ff7df3 | 862 | |
2311b1f2 ME |
863 | /* pci_mmap_page_range() expects the same kind of entry as coming |
864 | * from /proc/bus/pci/ which is a "user visible" value. If this is | |
865 | * different from the resource itself, arch will do necessary fixup. | |
866 | */ | |
867 | pci_resource_to_user(pdev, i, res, &start, &end); | |
868 | vma->vm_pgoff += start >> PAGE_SHIFT; | |
1da177e4 LT |
869 | mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io; |
870 | ||
e8de1481 AV |
871 | if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(start)) |
872 | return -EINVAL; | |
873 | ||
45aec1ae | 874 | return pci_mmap_page_range(pdev, vma, mmap_type, write_combine); |
875 | } | |
876 | ||
877 | static int | |
2c3c8bea CW |
878 | pci_mmap_resource_uc(struct file *filp, struct kobject *kobj, |
879 | struct bin_attribute *attr, | |
45aec1ae | 880 | struct vm_area_struct *vma) |
881 | { | |
882 | return pci_mmap_resource(kobj, attr, vma, 0); | |
883 | } | |
884 | ||
885 | static int | |
2c3c8bea CW |
886 | pci_mmap_resource_wc(struct file *filp, struct kobject *kobj, |
887 | struct bin_attribute *attr, | |
45aec1ae | 888 | struct vm_area_struct *vma) |
889 | { | |
890 | return pci_mmap_resource(kobj, attr, vma, 1); | |
1da177e4 LT |
891 | } |
892 | ||
8633328b AW |
893 | static ssize_t |
894 | pci_resource_io(struct file *filp, struct kobject *kobj, | |
895 | struct bin_attribute *attr, char *buf, | |
896 | loff_t off, size_t count, bool write) | |
897 | { | |
898 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, | |
899 | struct device, kobj)); | |
900 | struct resource *res = attr->private; | |
901 | unsigned long port = off; | |
902 | int i; | |
903 | ||
904 | for (i = 0; i < PCI_ROM_RESOURCE; i++) | |
905 | if (res == &pdev->resource[i]) | |
906 | break; | |
907 | if (i >= PCI_ROM_RESOURCE) | |
908 | return -ENODEV; | |
909 | ||
910 | port += pci_resource_start(pdev, i); | |
911 | ||
912 | if (port > pci_resource_end(pdev, i)) | |
913 | return 0; | |
914 | ||
915 | if (port + count - 1 > pci_resource_end(pdev, i)) | |
916 | return -EINVAL; | |
917 | ||
918 | switch (count) { | |
919 | case 1: | |
920 | if (write) | |
921 | outb(*(u8 *)buf, port); | |
922 | else | |
923 | *(u8 *)buf = inb(port); | |
924 | return 1; | |
925 | case 2: | |
926 | if (write) | |
927 | outw(*(u16 *)buf, port); | |
928 | else | |
929 | *(u16 *)buf = inw(port); | |
930 | return 2; | |
931 | case 4: | |
932 | if (write) | |
933 | outl(*(u32 *)buf, port); | |
934 | else | |
935 | *(u32 *)buf = inl(port); | |
936 | return 4; | |
937 | } | |
938 | return -EINVAL; | |
939 | } | |
940 | ||
941 | static ssize_t | |
942 | pci_read_resource_io(struct file *filp, struct kobject *kobj, | |
943 | struct bin_attribute *attr, char *buf, | |
944 | loff_t off, size_t count) | |
945 | { | |
946 | return pci_resource_io(filp, kobj, attr, buf, off, count, false); | |
947 | } | |
948 | ||
949 | static ssize_t | |
950 | pci_write_resource_io(struct file *filp, struct kobject *kobj, | |
951 | struct bin_attribute *attr, char *buf, | |
952 | loff_t off, size_t count) | |
953 | { | |
954 | return pci_resource_io(filp, kobj, attr, buf, off, count, true); | |
955 | } | |
956 | ||
b19441af GKH |
957 | /** |
958 | * pci_remove_resource_files - cleanup resource files | |
cffb2faf | 959 | * @pdev: dev to cleanup |
b19441af | 960 | * |
cffb2faf | 961 | * If we created resource files for @pdev, remove them from sysfs and |
b19441af GKH |
962 | * free their resources. |
963 | */ | |
964 | static void | |
965 | pci_remove_resource_files(struct pci_dev *pdev) | |
966 | { | |
967 | int i; | |
968 | ||
969 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
970 | struct bin_attribute *res_attr; | |
971 | ||
972 | res_attr = pdev->res_attr[i]; | |
973 | if (res_attr) { | |
974 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
975 | kfree(res_attr); | |
976 | } | |
45aec1ae | 977 | |
978 | res_attr = pdev->res_attr_wc[i]; | |
979 | if (res_attr) { | |
980 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
981 | kfree(res_attr); | |
982 | } | |
b19441af GKH |
983 | } |
984 | } | |
985 | ||
45aec1ae | 986 | static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine) |
987 | { | |
988 | /* allocate attribute structure, piggyback attribute name */ | |
989 | int name_len = write_combine ? 13 : 10; | |
990 | struct bin_attribute *res_attr; | |
991 | int retval; | |
992 | ||
993 | res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC); | |
994 | if (res_attr) { | |
995 | char *res_attr_name = (char *)(res_attr + 1); | |
996 | ||
a07e4156 | 997 | sysfs_bin_attr_init(res_attr); |
45aec1ae | 998 | if (write_combine) { |
999 | pdev->res_attr_wc[num] = res_attr; | |
1000 | sprintf(res_attr_name, "resource%d_wc", num); | |
1001 | res_attr->mmap = pci_mmap_resource_wc; | |
1002 | } else { | |
1003 | pdev->res_attr[num] = res_attr; | |
1004 | sprintf(res_attr_name, "resource%d", num); | |
1005 | res_attr->mmap = pci_mmap_resource_uc; | |
1006 | } | |
8633328b AW |
1007 | if (pci_resource_flags(pdev, num) & IORESOURCE_IO) { |
1008 | res_attr->read = pci_read_resource_io; | |
1009 | res_attr->write = pci_write_resource_io; | |
1010 | } | |
45aec1ae | 1011 | res_attr->attr.name = res_attr_name; |
1012 | res_attr->attr.mode = S_IRUSR | S_IWUSR; | |
1013 | res_attr->size = pci_resource_len(pdev, num); | |
1014 | res_attr->private = &pdev->resource[num]; | |
1015 | retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr); | |
1016 | } else | |
1017 | retval = -ENOMEM; | |
1018 | ||
1019 | return retval; | |
1020 | } | |
1021 | ||
1da177e4 LT |
1022 | /** |
1023 | * pci_create_resource_files - create resource files in sysfs for @dev | |
cffb2faf | 1024 | * @pdev: dev in question |
1da177e4 | 1025 | * |
cffb2faf | 1026 | * Walk the resources in @pdev creating files for each resource available. |
1da177e4 | 1027 | */ |
b19441af | 1028 | static int pci_create_resource_files(struct pci_dev *pdev) |
1da177e4 LT |
1029 | { |
1030 | int i; | |
b19441af | 1031 | int retval; |
1da177e4 LT |
1032 | |
1033 | /* Expose the PCI resources from this device as files */ | |
1034 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
1da177e4 LT |
1035 | |
1036 | /* skip empty resources */ | |
1037 | if (!pci_resource_len(pdev, i)) | |
1038 | continue; | |
1039 | ||
45aec1ae | 1040 | retval = pci_create_attr(pdev, i, 0); |
1041 | /* for prefetchable resources, create a WC mappable file */ | |
1042 | if (!retval && pdev->resource[i].flags & IORESOURCE_PREFETCH) | |
1043 | retval = pci_create_attr(pdev, i, 1); | |
1044 | ||
1045 | if (retval) { | |
1046 | pci_remove_resource_files(pdev); | |
1047 | return retval; | |
1da177e4 LT |
1048 | } |
1049 | } | |
b19441af | 1050 | return 0; |
1da177e4 LT |
1051 | } |
1052 | #else /* !HAVE_PCI_MMAP */ | |
10a0ef39 IK |
1053 | int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; } |
1054 | void __weak pci_remove_resource_files(struct pci_dev *dev) { return; } | |
1da177e4 LT |
1055 | #endif /* HAVE_PCI_MMAP */ |
1056 | ||
1057 | /** | |
1058 | * pci_write_rom - used to enable access to the PCI ROM display | |
2c3c8bea | 1059 | * @filp: sysfs file |
1da177e4 | 1060 | * @kobj: kernel object handle |
cffb2faf | 1061 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
1062 | * @buf: user input |
1063 | * @off: file offset | |
1064 | * @count: number of byte in input | |
1065 | * | |
1066 | * writing anything except 0 enables it | |
1067 | */ | |
1068 | static ssize_t | |
2c3c8bea CW |
1069 | pci_write_rom(struct file *filp, struct kobject *kobj, |
1070 | struct bin_attribute *bin_attr, | |
91a69029 | 1071 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
1072 | { |
1073 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj)); | |
1074 | ||
1075 | if ((off == 0) && (*buf == '0') && (count == 2)) | |
1076 | pdev->rom_attr_enabled = 0; | |
1077 | else | |
1078 | pdev->rom_attr_enabled = 1; | |
1079 | ||
1080 | return count; | |
1081 | } | |
1082 | ||
1083 | /** | |
1084 | * pci_read_rom - read a PCI ROM | |
2c3c8bea | 1085 | * @filp: sysfs file |
1da177e4 | 1086 | * @kobj: kernel object handle |
cffb2faf | 1087 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
1088 | * @buf: where to put the data we read from the ROM |
1089 | * @off: file offset | |
1090 | * @count: number of bytes to read | |
1091 | * | |
1092 | * Put @count bytes starting at @off into @buf from the ROM in the PCI | |
1093 | * device corresponding to @kobj. | |
1094 | */ | |
1095 | static ssize_t | |
2c3c8bea CW |
1096 | pci_read_rom(struct file *filp, struct kobject *kobj, |
1097 | struct bin_attribute *bin_attr, | |
91a69029 | 1098 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
1099 | { |
1100 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj)); | |
1101 | void __iomem *rom; | |
1102 | size_t size; | |
1103 | ||
1104 | if (!pdev->rom_attr_enabled) | |
1105 | return -EINVAL; | |
1106 | ||
1107 | rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */ | |
97c44836 TN |
1108 | if (!rom || !size) |
1109 | return -EIO; | |
1da177e4 LT |
1110 | |
1111 | if (off >= size) | |
1112 | count = 0; | |
1113 | else { | |
1114 | if (off + count > size) | |
1115 | count = size - off; | |
1116 | ||
1117 | memcpy_fromio(buf, rom + off, count); | |
1118 | } | |
1119 | pci_unmap_rom(pdev, rom); | |
1120 | ||
1121 | return count; | |
1122 | } | |
1123 | ||
1124 | static struct bin_attribute pci_config_attr = { | |
1125 | .attr = { | |
1126 | .name = "config", | |
1127 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 1128 | }, |
557848c3 | 1129 | .size = PCI_CFG_SPACE_SIZE, |
1da177e4 LT |
1130 | .read = pci_read_config, |
1131 | .write = pci_write_config, | |
1132 | }; | |
1133 | ||
1134 | static struct bin_attribute pcie_config_attr = { | |
1135 | .attr = { | |
1136 | .name = "config", | |
1137 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 1138 | }, |
557848c3 | 1139 | .size = PCI_CFG_SPACE_EXP_SIZE, |
1da177e4 LT |
1140 | .read = pci_read_config, |
1141 | .write = pci_write_config, | |
1142 | }; | |
1143 | ||
d6d88c83 | 1144 | int __weak pcibios_add_platform_entries(struct pci_dev *dev) |
575e3348 | 1145 | { |
a2cd52ca | 1146 | return 0; |
575e3348 ME |
1147 | } |
1148 | ||
711d5779 MT |
1149 | static ssize_t reset_store(struct device *dev, |
1150 | struct device_attribute *attr, const char *buf, | |
1151 | size_t count) | |
1152 | { | |
1153 | struct pci_dev *pdev = to_pci_dev(dev); | |
1154 | unsigned long val; | |
1155 | ssize_t result = strict_strtoul(buf, 0, &val); | |
1156 | ||
1157 | if (result < 0) | |
1158 | return result; | |
1159 | ||
1160 | if (val != 1) | |
1161 | return -EINVAL; | |
447c5dd7 MS |
1162 | |
1163 | result = pci_reset_function(pdev); | |
1164 | if (result < 0) | |
1165 | return result; | |
1166 | ||
1167 | return count; | |
711d5779 MT |
1168 | } |
1169 | ||
1170 | static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store); | |
1171 | ||
280c73d3 ZY |
1172 | static int pci_create_capabilities_sysfs(struct pci_dev *dev) |
1173 | { | |
1174 | int retval; | |
1175 | struct bin_attribute *attr; | |
1176 | ||
1177 | /* If the device has VPD, try to expose it in sysfs. */ | |
1178 | if (dev->vpd) { | |
1179 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); | |
1180 | if (!attr) | |
1181 | return -ENOMEM; | |
1182 | ||
a07e4156 | 1183 | sysfs_bin_attr_init(attr); |
280c73d3 ZY |
1184 | attr->size = dev->vpd->len; |
1185 | attr->attr.name = "vpd"; | |
1186 | attr->attr.mode = S_IRUSR | S_IWUSR; | |
287d19ce SH |
1187 | attr->read = read_vpd_attr; |
1188 | attr->write = write_vpd_attr; | |
280c73d3 ZY |
1189 | retval = sysfs_create_bin_file(&dev->dev.kobj, attr); |
1190 | if (retval) { | |
0f12a4e2 | 1191 | kfree(attr); |
280c73d3 ZY |
1192 | return retval; |
1193 | } | |
1194 | dev->vpd->attr = attr; | |
1195 | } | |
1196 | ||
1197 | /* Active State Power Management */ | |
1198 | pcie_aspm_create_sysfs_dev_files(dev); | |
1199 | ||
711d5779 MT |
1200 | if (!pci_probe_reset_function(dev)) { |
1201 | retval = device_create_file(&dev->dev, &reset_attr); | |
1202 | if (retval) | |
1203 | goto error; | |
1204 | dev->reset_fn = 1; | |
1205 | } | |
280c73d3 | 1206 | return 0; |
711d5779 MT |
1207 | |
1208 | error: | |
1209 | pcie_aspm_remove_sysfs_dev_files(dev); | |
1210 | if (dev->vpd && dev->vpd->attr) { | |
1211 | sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr); | |
1212 | kfree(dev->vpd->attr); | |
1213 | } | |
1214 | ||
1215 | return retval; | |
280c73d3 ZY |
1216 | } |
1217 | ||
b19441af | 1218 | int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev) |
1da177e4 | 1219 | { |
b19441af | 1220 | int retval; |
280c73d3 ZY |
1221 | int rom_size = 0; |
1222 | struct bin_attribute *attr; | |
b19441af | 1223 | |
1da177e4 LT |
1224 | if (!sysfs_initialized) |
1225 | return -EACCES; | |
1226 | ||
557848c3 | 1227 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
b19441af | 1228 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1da177e4 | 1229 | else |
b19441af GKH |
1230 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
1231 | if (retval) | |
1232 | goto err; | |
1da177e4 | 1233 | |
b19441af GKH |
1234 | retval = pci_create_resource_files(pdev); |
1235 | if (retval) | |
280c73d3 ZY |
1236 | goto err_config_file; |
1237 | ||
1238 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) | |
1239 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); | |
1240 | else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW) | |
1241 | rom_size = 0x20000; | |
1da177e4 LT |
1242 | |
1243 | /* If the device has a ROM, try to expose it in sysfs. */ | |
280c73d3 | 1244 | if (rom_size) { |
94e61088 | 1245 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); |
280c73d3 | 1246 | if (!attr) { |
b19441af | 1247 | retval = -ENOMEM; |
9890b12a | 1248 | goto err_resource_files; |
1da177e4 | 1249 | } |
a07e4156 | 1250 | sysfs_bin_attr_init(attr); |
280c73d3 ZY |
1251 | attr->size = rom_size; |
1252 | attr->attr.name = "rom"; | |
ff29530e | 1253 | attr->attr.mode = S_IRUSR | S_IWUSR; |
280c73d3 ZY |
1254 | attr->read = pci_read_rom; |
1255 | attr->write = pci_write_rom; | |
1256 | retval = sysfs_create_bin_file(&pdev->dev.kobj, attr); | |
1257 | if (retval) { | |
1258 | kfree(attr); | |
1259 | goto err_resource_files; | |
1260 | } | |
1261 | pdev->rom_attr = attr; | |
1da177e4 | 1262 | } |
280c73d3 | 1263 | |
217f45de DA |
1264 | if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) { |
1265 | retval = device_create_file(&pdev->dev, &vga_attr); | |
1266 | if (retval) | |
1267 | goto err_rom_file; | |
1268 | } | |
1269 | ||
1da177e4 | 1270 | /* add platform-specific attributes */ |
280c73d3 ZY |
1271 | retval = pcibios_add_platform_entries(pdev); |
1272 | if (retval) | |
217f45de | 1273 | goto err_vga_file; |
b19441af | 1274 | |
280c73d3 ZY |
1275 | /* add sysfs entries for various capabilities */ |
1276 | retval = pci_create_capabilities_sysfs(pdev); | |
1277 | if (retval) | |
217f45de | 1278 | goto err_vga_file; |
7d715a6c | 1279 | |
911e1c9b N |
1280 | pci_create_firmware_label_files(pdev); |
1281 | ||
1da177e4 | 1282 | return 0; |
b19441af | 1283 | |
217f45de DA |
1284 | err_vga_file: |
1285 | if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) | |
1286 | device_remove_file(&pdev->dev, &vga_attr); | |
a2cd52ca | 1287 | err_rom_file: |
280c73d3 | 1288 | if (rom_size) { |
94e61088 | 1289 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); |
280c73d3 ZY |
1290 | kfree(pdev->rom_attr); |
1291 | pdev->rom_attr = NULL; | |
1292 | } | |
9890b12a ME |
1293 | err_resource_files: |
1294 | pci_remove_resource_files(pdev); | |
94e61088 | 1295 | err_config_file: |
557848c3 | 1296 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
b19441af GKH |
1297 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1298 | else | |
1299 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); | |
1300 | err: | |
1301 | return retval; | |
1da177e4 LT |
1302 | } |
1303 | ||
280c73d3 ZY |
1304 | static void pci_remove_capabilities_sysfs(struct pci_dev *dev) |
1305 | { | |
1306 | if (dev->vpd && dev->vpd->attr) { | |
1307 | sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr); | |
1308 | kfree(dev->vpd->attr); | |
1309 | } | |
1310 | ||
1311 | pcie_aspm_remove_sysfs_dev_files(dev); | |
711d5779 MT |
1312 | if (dev->reset_fn) { |
1313 | device_remove_file(&dev->dev, &reset_attr); | |
1314 | dev->reset_fn = 0; | |
1315 | } | |
280c73d3 ZY |
1316 | } |
1317 | ||
1da177e4 LT |
1318 | /** |
1319 | * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files | |
1320 | * @pdev: device whose entries we should free | |
1321 | * | |
1322 | * Cleanup when @pdev is removed from sysfs. | |
1323 | */ | |
1324 | void pci_remove_sysfs_dev_files(struct pci_dev *pdev) | |
1325 | { | |
280c73d3 ZY |
1326 | int rom_size = 0; |
1327 | ||
d67afe5e DM |
1328 | if (!sysfs_initialized) |
1329 | return; | |
1330 | ||
280c73d3 | 1331 | pci_remove_capabilities_sysfs(pdev); |
7d715a6c | 1332 | |
557848c3 | 1333 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
1da177e4 LT |
1334 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1335 | else | |
1336 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); | |
1337 | ||
1338 | pci_remove_resource_files(pdev); | |
1339 | ||
280c73d3 ZY |
1340 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) |
1341 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); | |
1342 | else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW) | |
1343 | rom_size = 0x20000; | |
1344 | ||
1345 | if (rom_size && pdev->rom_attr) { | |
1346 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); | |
1347 | kfree(pdev->rom_attr); | |
1da177e4 | 1348 | } |
911e1c9b N |
1349 | |
1350 | pci_remove_firmware_label_files(pdev); | |
1351 | ||
1da177e4 LT |
1352 | } |
1353 | ||
1354 | static int __init pci_sysfs_init(void) | |
1355 | { | |
1356 | struct pci_dev *pdev = NULL; | |
b19441af GKH |
1357 | int retval; |
1358 | ||
1da177e4 | 1359 | sysfs_initialized = 1; |
b19441af GKH |
1360 | for_each_pci_dev(pdev) { |
1361 | retval = pci_create_sysfs_dev_files(pdev); | |
151fc5df JL |
1362 | if (retval) { |
1363 | pci_dev_put(pdev); | |
b19441af | 1364 | return retval; |
151fc5df | 1365 | } |
b19441af | 1366 | } |
1da177e4 LT |
1367 | |
1368 | return 0; | |
1369 | } | |
1370 | ||
40ee9e9f | 1371 | late_initcall(pci_sysfs_init); |