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> | |
22 | #include <linux/topology.h> | |
23 | #include <linux/mm.h> | |
de139a33 | 24 | #include <linux/fs.h> |
aa0ac365 | 25 | #include <linux/capability.h> |
a628e7b8 | 26 | #include <linux/security.h> |
7d715a6c | 27 | #include <linux/pci-aspm.h> |
5a0e3ad6 | 28 | #include <linux/slab.h> |
1da177e4 LT |
29 | #include "pci.h" |
30 | ||
31 | static int sysfs_initialized; /* = 0 */ | |
32 | ||
33 | /* show configuration fields */ | |
34 | #define pci_config_attr(field, format_string) \ | |
35 | static ssize_t \ | |
e404e274 | 36 | field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
37 | { \ |
38 | struct pci_dev *pdev; \ | |
39 | \ | |
40 | pdev = to_pci_dev (dev); \ | |
41 | return sprintf (buf, format_string, pdev->field); \ | |
42 | } | |
43 | ||
44 | pci_config_attr(vendor, "0x%04x\n"); | |
45 | pci_config_attr(device, "0x%04x\n"); | |
46 | pci_config_attr(subsystem_vendor, "0x%04x\n"); | |
47 | pci_config_attr(subsystem_device, "0x%04x\n"); | |
48 | pci_config_attr(class, "0x%06x\n"); | |
49 | pci_config_attr(irq, "%u\n"); | |
50 | ||
bdee9d98 DT |
51 | static ssize_t broken_parity_status_show(struct device *dev, |
52 | struct device_attribute *attr, | |
53 | char *buf) | |
54 | { | |
55 | struct pci_dev *pdev = to_pci_dev(dev); | |
56 | return sprintf (buf, "%u\n", pdev->broken_parity_status); | |
57 | } | |
58 | ||
59 | static ssize_t broken_parity_status_store(struct device *dev, | |
60 | struct device_attribute *attr, | |
61 | const char *buf, size_t count) | |
62 | { | |
63 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 | 64 | unsigned long val; |
bdee9d98 | 65 | |
92425a40 TP |
66 | if (strict_strtoul(buf, 0, &val) < 0) |
67 | return -EINVAL; | |
68 | ||
69 | pdev->broken_parity_status = !!val; | |
70 | ||
71 | return count; | |
bdee9d98 DT |
72 | } |
73 | ||
4327edf6 AC |
74 | static ssize_t local_cpus_show(struct device *dev, |
75 | struct device_attribute *attr, char *buf) | |
1da177e4 | 76 | { |
3be83050 | 77 | const struct cpumask *mask; |
4327edf6 AC |
78 | int len; |
79 | ||
e0cd5160 | 80 | #ifdef CONFIG_NUMA |
6be954d1 DJ |
81 | mask = (dev_to_node(dev) == -1) ? cpu_online_mask : |
82 | cpumask_of_node(dev_to_node(dev)); | |
e0cd5160 | 83 | #else |
3be83050 | 84 | mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); |
e0cd5160 | 85 | #endif |
3be83050 | 86 | len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask); |
39106dcf MT |
87 | buf[len++] = '\n'; |
88 | buf[len] = '\0'; | |
89 | return len; | |
90 | } | |
91 | ||
92 | ||
93 | static ssize_t local_cpulist_show(struct device *dev, | |
94 | struct device_attribute *attr, char *buf) | |
95 | { | |
3be83050 | 96 | const struct cpumask *mask; |
39106dcf MT |
97 | int len; |
98 | ||
e0cd5160 | 99 | #ifdef CONFIG_NUMA |
6be954d1 DJ |
100 | mask = (dev_to_node(dev) == -1) ? cpu_online_mask : |
101 | cpumask_of_node(dev_to_node(dev)); | |
e0cd5160 | 102 | #else |
3be83050 | 103 | mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); |
e0cd5160 | 104 | #endif |
3be83050 | 105 | len = cpulist_scnprintf(buf, PAGE_SIZE-2, mask); |
39106dcf MT |
106 | buf[len++] = '\n'; |
107 | buf[len] = '\0'; | |
108 | return len; | |
1da177e4 LT |
109 | } |
110 | ||
dc2c2c9d YL |
111 | /* |
112 | * PCI Bus Class Devices | |
113 | */ | |
114 | static ssize_t pci_bus_show_cpuaffinity(struct device *dev, | |
115 | int type, | |
116 | struct device_attribute *attr, | |
117 | char *buf) | |
118 | { | |
119 | int ret; | |
120 | const struct cpumask *cpumask; | |
121 | ||
122 | cpumask = cpumask_of_pcibus(to_pci_bus(dev)); | |
123 | ret = type ? | |
124 | cpulist_scnprintf(buf, PAGE_SIZE-2, cpumask) : | |
125 | cpumask_scnprintf(buf, PAGE_SIZE-2, cpumask); | |
126 | buf[ret++] = '\n'; | |
127 | buf[ret] = '\0'; | |
128 | return ret; | |
129 | } | |
130 | ||
131 | static inline ssize_t pci_bus_show_cpumaskaffinity(struct device *dev, | |
132 | struct device_attribute *attr, | |
133 | char *buf) | |
134 | { | |
135 | return pci_bus_show_cpuaffinity(dev, 0, attr, buf); | |
136 | } | |
137 | ||
138 | static inline ssize_t pci_bus_show_cpulistaffinity(struct device *dev, | |
139 | struct device_attribute *attr, | |
140 | char *buf) | |
141 | { | |
142 | return pci_bus_show_cpuaffinity(dev, 1, attr, buf); | |
143 | } | |
144 | ||
1da177e4 LT |
145 | /* show resources */ |
146 | static ssize_t | |
e404e274 | 147 | resource_show(struct device * dev, struct device_attribute *attr, char * buf) |
1da177e4 LT |
148 | { |
149 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
150 | char * str = buf; | |
151 | int i; | |
fde09c6d | 152 | int max; |
e31dd6e4 | 153 | resource_size_t start, end; |
1da177e4 LT |
154 | |
155 | if (pci_dev->subordinate) | |
156 | max = DEVICE_COUNT_RESOURCE; | |
fde09c6d YZ |
157 | else |
158 | max = PCI_BRIDGE_RESOURCES; | |
1da177e4 LT |
159 | |
160 | for (i = 0; i < max; i++) { | |
2311b1f2 ME |
161 | struct resource *res = &pci_dev->resource[i]; |
162 | pci_resource_to_user(pci_dev, i, res, &start, &end); | |
163 | str += sprintf(str,"0x%016llx 0x%016llx 0x%016llx\n", | |
164 | (unsigned long long)start, | |
165 | (unsigned long long)end, | |
166 | (unsigned long long)res->flags); | |
1da177e4 LT |
167 | } |
168 | return (str - buf); | |
169 | } | |
170 | ||
87c8a443 | 171 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) |
9888549e GK |
172 | { |
173 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
174 | ||
175 | return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n", | |
176 | pci_dev->vendor, pci_dev->device, | |
177 | pci_dev->subsystem_vendor, pci_dev->subsystem_device, | |
178 | (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8), | |
179 | (u8)(pci_dev->class)); | |
180 | } | |
bae94d02 IPG |
181 | |
182 | static ssize_t is_enabled_store(struct device *dev, | |
183 | struct device_attribute *attr, const char *buf, | |
184 | size_t count) | |
9f125d30 AV |
185 | { |
186 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 TP |
187 | unsigned long val; |
188 | ssize_t result = strict_strtoul(buf, 0, &val); | |
189 | ||
190 | if (result < 0) | |
191 | return result; | |
9f125d30 AV |
192 | |
193 | /* this can crash the machine when done on the "wrong" device */ | |
194 | if (!capable(CAP_SYS_ADMIN)) | |
92425a40 | 195 | return -EPERM; |
9f125d30 | 196 | |
92425a40 | 197 | if (!val) { |
296ccb08 | 198 | if (pci_is_enabled(pdev)) |
bae94d02 IPG |
199 | pci_disable_device(pdev); |
200 | else | |
201 | result = -EIO; | |
92425a40 | 202 | } else |
bae94d02 | 203 | result = pci_enable_device(pdev); |
9f125d30 | 204 | |
bae94d02 IPG |
205 | return result < 0 ? result : count; |
206 | } | |
207 | ||
208 | static ssize_t is_enabled_show(struct device *dev, | |
209 | struct device_attribute *attr, char *buf) | |
210 | { | |
211 | struct pci_dev *pdev; | |
9f125d30 | 212 | |
bae94d02 IPG |
213 | pdev = to_pci_dev (dev); |
214 | return sprintf (buf, "%u\n", atomic_read(&pdev->enable_cnt)); | |
9f125d30 AV |
215 | } |
216 | ||
81bb0e19 BG |
217 | #ifdef CONFIG_NUMA |
218 | static ssize_t | |
219 | numa_node_show(struct device *dev, struct device_attribute *attr, char *buf) | |
220 | { | |
221 | return sprintf (buf, "%d\n", dev->numa_node); | |
222 | } | |
223 | #endif | |
224 | ||
bb965401 YL |
225 | static ssize_t |
226 | dma_mask_bits_show(struct device *dev, struct device_attribute *attr, char *buf) | |
227 | { | |
228 | struct pci_dev *pdev = to_pci_dev(dev); | |
229 | ||
230 | return sprintf (buf, "%d\n", fls64(pdev->dma_mask)); | |
231 | } | |
232 | ||
233 | static ssize_t | |
234 | consistent_dma_mask_bits_show(struct device *dev, struct device_attribute *attr, | |
235 | char *buf) | |
236 | { | |
237 | return sprintf (buf, "%d\n", fls64(dev->coherent_dma_mask)); | |
238 | } | |
239 | ||
fe97064c BG |
240 | static ssize_t |
241 | msi_bus_show(struct device *dev, struct device_attribute *attr, char *buf) | |
242 | { | |
243 | struct pci_dev *pdev = to_pci_dev(dev); | |
244 | ||
245 | if (!pdev->subordinate) | |
246 | return 0; | |
247 | ||
248 | return sprintf (buf, "%u\n", | |
249 | !(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI)); | |
250 | } | |
251 | ||
252 | static ssize_t | |
253 | msi_bus_store(struct device *dev, struct device_attribute *attr, | |
254 | const char *buf, size_t count) | |
255 | { | |
256 | struct pci_dev *pdev = to_pci_dev(dev); | |
92425a40 TP |
257 | unsigned long val; |
258 | ||
259 | if (strict_strtoul(buf, 0, &val) < 0) | |
260 | return -EINVAL; | |
fe97064c BG |
261 | |
262 | /* bad things may happen if the no_msi flag is changed | |
263 | * while some drivers are loaded */ | |
264 | if (!capable(CAP_SYS_ADMIN)) | |
92425a40 | 265 | return -EPERM; |
fe97064c | 266 | |
92425a40 TP |
267 | /* Maybe pci devices without subordinate busses shouldn't even have this |
268 | * attribute in the first place? */ | |
fe97064c BG |
269 | if (!pdev->subordinate) |
270 | return count; | |
271 | ||
92425a40 TP |
272 | /* Is the flag going to change, or keep the value it already had? */ |
273 | if (!(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) ^ | |
274 | !!val) { | |
275 | pdev->subordinate->bus_flags ^= PCI_BUS_FLAGS_NO_MSI; | |
fe97064c | 276 | |
92425a40 TP |
277 | dev_warn(&pdev->dev, "forced subordinate bus to%s support MSI," |
278 | " bad things could happen\n", val ? "" : " not"); | |
fe97064c BG |
279 | } |
280 | ||
281 | return count; | |
282 | } | |
9888549e | 283 | |
705b1aaa AC |
284 | #ifdef CONFIG_HOTPLUG |
285 | static DEFINE_MUTEX(pci_remove_rescan_mutex); | |
286 | static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf, | |
287 | size_t count) | |
288 | { | |
289 | unsigned long val; | |
290 | struct pci_bus *b = NULL; | |
291 | ||
292 | if (strict_strtoul(buf, 0, &val) < 0) | |
293 | return -EINVAL; | |
294 | ||
295 | if (val) { | |
296 | mutex_lock(&pci_remove_rescan_mutex); | |
297 | while ((b = pci_find_next_bus(b)) != NULL) | |
298 | pci_rescan_bus(b); | |
299 | mutex_unlock(&pci_remove_rescan_mutex); | |
300 | } | |
301 | return count; | |
302 | } | |
303 | ||
304 | struct bus_attribute pci_bus_attrs[] = { | |
305 | __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store), | |
306 | __ATTR_NULL | |
307 | }; | |
77c27c7b | 308 | |
738a6396 AC |
309 | static ssize_t |
310 | dev_rescan_store(struct device *dev, struct device_attribute *attr, | |
311 | const char *buf, size_t count) | |
312 | { | |
313 | unsigned long val; | |
314 | struct pci_dev *pdev = to_pci_dev(dev); | |
315 | ||
316 | if (strict_strtoul(buf, 0, &val) < 0) | |
317 | return -EINVAL; | |
318 | ||
319 | if (val) { | |
320 | mutex_lock(&pci_remove_rescan_mutex); | |
321 | pci_rescan_bus(pdev->bus); | |
322 | mutex_unlock(&pci_remove_rescan_mutex); | |
323 | } | |
324 | return count; | |
325 | } | |
326 | ||
77c27c7b AC |
327 | static void remove_callback(struct device *dev) |
328 | { | |
329 | struct pci_dev *pdev = to_pci_dev(dev); | |
330 | ||
331 | mutex_lock(&pci_remove_rescan_mutex); | |
332 | pci_remove_bus_device(pdev); | |
333 | mutex_unlock(&pci_remove_rescan_mutex); | |
334 | } | |
335 | ||
336 | static ssize_t | |
337 | remove_store(struct device *dev, struct device_attribute *dummy, | |
338 | const char *buf, size_t count) | |
339 | { | |
340 | int ret = 0; | |
341 | unsigned long val; | |
77c27c7b AC |
342 | |
343 | if (strict_strtoul(buf, 0, &val) < 0) | |
344 | return -EINVAL; | |
345 | ||
77c27c7b AC |
346 | /* An attribute cannot be unregistered by one of its own methods, |
347 | * so we have to use this roundabout approach. | |
348 | */ | |
349 | if (val) | |
350 | ret = device_schedule_callback(dev, remove_callback); | |
351 | if (ret) | |
352 | count = ret; | |
353 | return count; | |
354 | } | |
b9d320fc YL |
355 | |
356 | static ssize_t | |
357 | dev_bus_rescan_store(struct device *dev, struct device_attribute *attr, | |
358 | const char *buf, size_t count) | |
359 | { | |
360 | unsigned long val; | |
361 | struct pci_bus *bus = to_pci_bus(dev); | |
362 | ||
363 | if (strict_strtoul(buf, 0, &val) < 0) | |
364 | return -EINVAL; | |
365 | ||
366 | if (val) { | |
367 | mutex_lock(&pci_remove_rescan_mutex); | |
368 | pci_rescan_bus(bus); | |
369 | mutex_unlock(&pci_remove_rescan_mutex); | |
370 | } | |
371 | return count; | |
372 | } | |
373 | ||
705b1aaa AC |
374 | #endif |
375 | ||
1da177e4 LT |
376 | struct device_attribute pci_dev_attrs[] = { |
377 | __ATTR_RO(resource), | |
378 | __ATTR_RO(vendor), | |
379 | __ATTR_RO(device), | |
380 | __ATTR_RO(subsystem_vendor), | |
381 | __ATTR_RO(subsystem_device), | |
382 | __ATTR_RO(class), | |
383 | __ATTR_RO(irq), | |
384 | __ATTR_RO(local_cpus), | |
39106dcf | 385 | __ATTR_RO(local_cpulist), |
9888549e | 386 | __ATTR_RO(modalias), |
81bb0e19 BG |
387 | #ifdef CONFIG_NUMA |
388 | __ATTR_RO(numa_node), | |
389 | #endif | |
bb965401 YL |
390 | __ATTR_RO(dma_mask_bits), |
391 | __ATTR_RO(consistent_dma_mask_bits), | |
9f125d30 | 392 | __ATTR(enable, 0600, is_enabled_show, is_enabled_store), |
bdee9d98 DT |
393 | __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR), |
394 | broken_parity_status_show,broken_parity_status_store), | |
fe97064c | 395 | __ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store), |
77c27c7b AC |
396 | #ifdef CONFIG_HOTPLUG |
397 | __ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store), | |
738a6396 | 398 | __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store), |
77c27c7b | 399 | #endif |
1da177e4 LT |
400 | __ATTR_NULL, |
401 | }; | |
402 | ||
b9d320fc YL |
403 | struct device_attribute pcibus_dev_attrs[] = { |
404 | #ifdef CONFIG_HOTPLUG | |
405 | __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store), | |
406 | #endif | |
dc2c2c9d YL |
407 | __ATTR(cpuaffinity, S_IRUGO, pci_bus_show_cpumaskaffinity, NULL), |
408 | __ATTR(cpulistaffinity, S_IRUGO, pci_bus_show_cpulistaffinity, NULL), | |
b9d320fc YL |
409 | __ATTR_NULL, |
410 | }; | |
411 | ||
217f45de DA |
412 | static ssize_t |
413 | boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf) | |
414 | { | |
415 | struct pci_dev *pdev = to_pci_dev(dev); | |
416 | ||
417 | return sprintf(buf, "%u\n", | |
418 | !!(pdev->resource[PCI_ROM_RESOURCE].flags & | |
419 | IORESOURCE_ROM_SHADOW)); | |
420 | } | |
421 | struct device_attribute vga_attr = __ATTR_RO(boot_vga); | |
422 | ||
1da177e4 | 423 | static ssize_t |
2c3c8bea CW |
424 | pci_read_config(struct file *filp, struct kobject *kobj, |
425 | struct bin_attribute *bin_attr, | |
91a69029 | 426 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
427 | { |
428 | struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); | |
429 | unsigned int size = 64; | |
430 | loff_t init_off = off; | |
4c0619ad | 431 | u8 *data = (u8*) buf; |
1da177e4 LT |
432 | |
433 | /* Several chips lock up trying to read undefined config space */ | |
3486740a | 434 | if (security_capable(&init_user_ns, filp->f_cred, CAP_SYS_ADMIN) == 0) { |
1da177e4 LT |
435 | size = dev->cfg_size; |
436 | } else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { | |
437 | size = 128; | |
438 | } | |
439 | ||
440 | if (off > size) | |
441 | return 0; | |
442 | if (off + count > size) { | |
443 | size -= off; | |
444 | count = size; | |
445 | } else { | |
446 | size = count; | |
447 | } | |
448 | ||
4c0619ad | 449 | if ((off & 1) && size) { |
450 | u8 val; | |
e04b0ea2 | 451 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 452 | data[off - init_off] = val; |
1da177e4 | 453 | off++; |
4c0619ad | 454 | size--; |
455 | } | |
456 | ||
457 | if ((off & 3) && size > 2) { | |
458 | u16 val; | |
e04b0ea2 | 459 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 460 | data[off - init_off] = val & 0xff; |
461 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
462 | off += 2; | |
463 | size -= 2; | |
1da177e4 LT |
464 | } |
465 | ||
466 | while (size > 3) { | |
4c0619ad | 467 | u32 val; |
e04b0ea2 | 468 | pci_user_read_config_dword(dev, off, &val); |
4c0619ad | 469 | data[off - init_off] = val & 0xff; |
470 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
471 | data[off - init_off + 2] = (val >> 16) & 0xff; | |
472 | data[off - init_off + 3] = (val >> 24) & 0xff; | |
1da177e4 LT |
473 | off += 4; |
474 | size -= 4; | |
475 | } | |
476 | ||
4c0619ad | 477 | if (size >= 2) { |
478 | u16 val; | |
e04b0ea2 | 479 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 480 | data[off - init_off] = val & 0xff; |
481 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
482 | off += 2; | |
483 | size -= 2; | |
484 | } | |
485 | ||
486 | if (size > 0) { | |
487 | u8 val; | |
e04b0ea2 | 488 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 489 | data[off - init_off] = val; |
1da177e4 LT |
490 | off++; |
491 | --size; | |
492 | } | |
493 | ||
494 | return count; | |
495 | } | |
496 | ||
497 | static ssize_t | |
2c3c8bea CW |
498 | pci_write_config(struct file* filp, struct kobject *kobj, |
499 | struct bin_attribute *bin_attr, | |
91a69029 | 500 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
501 | { |
502 | struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); | |
503 | unsigned int size = count; | |
504 | loff_t init_off = off; | |
4c0619ad | 505 | u8 *data = (u8*) buf; |
1da177e4 LT |
506 | |
507 | if (off > dev->cfg_size) | |
508 | return 0; | |
509 | if (off + count > dev->cfg_size) { | |
510 | size = dev->cfg_size - off; | |
511 | count = size; | |
512 | } | |
4c0619ad | 513 | |
514 | if ((off & 1) && size) { | |
e04b0ea2 | 515 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 | 516 | off++; |
4c0619ad | 517 | size--; |
1da177e4 | 518 | } |
4c0619ad | 519 | |
520 | if ((off & 3) && size > 2) { | |
521 | u16 val = data[off - init_off]; | |
522 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 523 | pci_user_write_config_word(dev, off, val); |
4c0619ad | 524 | off += 2; |
525 | size -= 2; | |
526 | } | |
1da177e4 LT |
527 | |
528 | while (size > 3) { | |
4c0619ad | 529 | u32 val = data[off - init_off]; |
530 | val |= (u32) data[off - init_off + 1] << 8; | |
531 | val |= (u32) data[off - init_off + 2] << 16; | |
532 | val |= (u32) data[off - init_off + 3] << 24; | |
e04b0ea2 | 533 | pci_user_write_config_dword(dev, off, val); |
1da177e4 LT |
534 | off += 4; |
535 | size -= 4; | |
536 | } | |
4c0619ad | 537 | |
538 | if (size >= 2) { | |
539 | u16 val = data[off - init_off]; | |
540 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 541 | pci_user_write_config_word(dev, off, val); |
4c0619ad | 542 | off += 2; |
543 | size -= 2; | |
544 | } | |
1da177e4 | 545 | |
4c0619ad | 546 | if (size) { |
e04b0ea2 | 547 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 LT |
548 | off++; |
549 | --size; | |
550 | } | |
551 | ||
552 | return count; | |
553 | } | |
554 | ||
94e61088 | 555 | static ssize_t |
2c3c8bea CW |
556 | read_vpd_attr(struct file *filp, struct kobject *kobj, |
557 | struct bin_attribute *bin_attr, | |
287d19ce | 558 | char *buf, loff_t off, size_t count) |
94e61088 BH |
559 | { |
560 | struct pci_dev *dev = | |
561 | to_pci_dev(container_of(kobj, struct device, kobj)); | |
94e61088 BH |
562 | |
563 | if (off > bin_attr->size) | |
564 | count = 0; | |
565 | else if (count > bin_attr->size - off) | |
566 | count = bin_attr->size - off; | |
94e61088 | 567 | |
287d19ce | 568 | return pci_read_vpd(dev, off, count, buf); |
94e61088 BH |
569 | } |
570 | ||
571 | static ssize_t | |
2c3c8bea CW |
572 | write_vpd_attr(struct file *filp, struct kobject *kobj, |
573 | struct bin_attribute *bin_attr, | |
287d19ce | 574 | char *buf, loff_t off, size_t count) |
94e61088 BH |
575 | { |
576 | struct pci_dev *dev = | |
577 | to_pci_dev(container_of(kobj, struct device, kobj)); | |
94e61088 BH |
578 | |
579 | if (off > bin_attr->size) | |
580 | count = 0; | |
581 | else if (count > bin_attr->size - off) | |
582 | count = bin_attr->size - off; | |
94e61088 | 583 | |
287d19ce | 584 | return pci_write_vpd(dev, off, count, buf); |
94e61088 BH |
585 | } |
586 | ||
1da177e4 LT |
587 | #ifdef HAVE_PCI_LEGACY |
588 | /** | |
589 | * pci_read_legacy_io - read byte(s) from legacy I/O port space | |
2c3c8bea | 590 | * @filp: open sysfs file |
1da177e4 | 591 | * @kobj: kobject corresponding to file to read from |
cffb2faf | 592 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
593 | * @buf: buffer to store results |
594 | * @off: offset into legacy I/O port space | |
595 | * @count: number of bytes to read | |
596 | * | |
597 | * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
598 | * callback routine (pci_legacy_read). | |
599 | */ | |
f19aeb1f | 600 | static ssize_t |
2c3c8bea CW |
601 | pci_read_legacy_io(struct file *filp, struct kobject *kobj, |
602 | struct bin_attribute *bin_attr, | |
91a69029 | 603 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
604 | { |
605 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 606 | struct device, |
1da177e4 LT |
607 | kobj)); |
608 | ||
609 | /* Only support 1, 2 or 4 byte accesses */ | |
610 | if (count != 1 && count != 2 && count != 4) | |
611 | return -EINVAL; | |
612 | ||
613 | return pci_legacy_read(bus, off, (u32 *)buf, count); | |
614 | } | |
615 | ||
616 | /** | |
617 | * pci_write_legacy_io - write byte(s) to legacy I/O port space | |
2c3c8bea | 618 | * @filp: open sysfs file |
1da177e4 | 619 | * @kobj: kobject corresponding to file to read from |
cffb2faf | 620 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
621 | * @buf: buffer containing value to be written |
622 | * @off: offset into legacy I/O port space | |
623 | * @count: number of bytes to write | |
624 | * | |
625 | * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
626 | * callback routine (pci_legacy_write). | |
627 | */ | |
f19aeb1f | 628 | static ssize_t |
2c3c8bea CW |
629 | pci_write_legacy_io(struct file *filp, struct kobject *kobj, |
630 | struct bin_attribute *bin_attr, | |
91a69029 | 631 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
632 | { |
633 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 634 | struct device, |
1da177e4 LT |
635 | kobj)); |
636 | /* Only support 1, 2 or 4 byte accesses */ | |
637 | if (count != 1 && count != 2 && count != 4) | |
638 | return -EINVAL; | |
639 | ||
640 | return pci_legacy_write(bus, off, *(u32 *)buf, count); | |
641 | } | |
642 | ||
643 | /** | |
644 | * pci_mmap_legacy_mem - map legacy PCI memory into user memory space | |
2c3c8bea | 645 | * @filp: open sysfs file |
1da177e4 LT |
646 | * @kobj: kobject corresponding to device to be mapped |
647 | * @attr: struct bin_attribute for this file | |
648 | * @vma: struct vm_area_struct passed to mmap | |
649 | * | |
f19aeb1f | 650 | * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap |
1da177e4 LT |
651 | * legacy memory space (first meg of bus space) into application virtual |
652 | * memory space. | |
653 | */ | |
f19aeb1f | 654 | static int |
2c3c8bea CW |
655 | pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj, |
656 | struct bin_attribute *attr, | |
1da177e4 LT |
657 | struct vm_area_struct *vma) |
658 | { | |
659 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 660 | struct device, |
1da177e4 LT |
661 | kobj)); |
662 | ||
f19aeb1f BH |
663 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem); |
664 | } | |
665 | ||
666 | /** | |
667 | * pci_mmap_legacy_io - map legacy PCI IO into user memory space | |
2c3c8bea | 668 | * @filp: open sysfs file |
f19aeb1f BH |
669 | * @kobj: kobject corresponding to device to be mapped |
670 | * @attr: struct bin_attribute for this file | |
671 | * @vma: struct vm_area_struct passed to mmap | |
672 | * | |
673 | * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap | |
674 | * legacy IO space (first meg of bus space) into application virtual | |
675 | * memory space. Returns -ENOSYS if the operation isn't supported | |
676 | */ | |
677 | static int | |
2c3c8bea CW |
678 | pci_mmap_legacy_io(struct file *filp, struct kobject *kobj, |
679 | struct bin_attribute *attr, | |
f19aeb1f BH |
680 | struct vm_area_struct *vma) |
681 | { | |
682 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
683 | struct device, | |
684 | kobj)); | |
685 | ||
686 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io); | |
687 | } | |
688 | ||
10a0ef39 IK |
689 | /** |
690 | * pci_adjust_legacy_attr - adjustment of legacy file attributes | |
691 | * @b: bus to create files under | |
692 | * @mmap_type: I/O port or memory | |
693 | * | |
694 | * Stub implementation. Can be overridden by arch if necessary. | |
695 | */ | |
696 | void __weak | |
697 | pci_adjust_legacy_attr(struct pci_bus *b, enum pci_mmap_state mmap_type) | |
698 | { | |
699 | return; | |
700 | } | |
701 | ||
f19aeb1f BH |
702 | /** |
703 | * pci_create_legacy_files - create legacy I/O port and memory files | |
704 | * @b: bus to create files under | |
705 | * | |
706 | * Some platforms allow access to legacy I/O port and ISA memory space on | |
707 | * a per-bus basis. This routine creates the files and ties them into | |
708 | * their associated read, write and mmap files from pci-sysfs.c | |
709 | * | |
25985edc | 710 | * On error unwind, but don't propagate the error to the caller |
f19aeb1f BH |
711 | * as it is ok to set up the PCI bus without these files. |
712 | */ | |
713 | void pci_create_legacy_files(struct pci_bus *b) | |
714 | { | |
715 | int error; | |
716 | ||
717 | b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2, | |
718 | GFP_ATOMIC); | |
719 | if (!b->legacy_io) | |
720 | goto kzalloc_err; | |
721 | ||
62e877b8 | 722 | sysfs_bin_attr_init(b->legacy_io); |
f19aeb1f BH |
723 | b->legacy_io->attr.name = "legacy_io"; |
724 | b->legacy_io->size = 0xffff; | |
725 | b->legacy_io->attr.mode = S_IRUSR | S_IWUSR; | |
726 | b->legacy_io->read = pci_read_legacy_io; | |
727 | b->legacy_io->write = pci_write_legacy_io; | |
728 | b->legacy_io->mmap = pci_mmap_legacy_io; | |
10a0ef39 | 729 | pci_adjust_legacy_attr(b, pci_mmap_io); |
f19aeb1f BH |
730 | error = device_create_bin_file(&b->dev, b->legacy_io); |
731 | if (error) | |
732 | goto legacy_io_err; | |
733 | ||
734 | /* Allocated above after the legacy_io struct */ | |
735 | b->legacy_mem = b->legacy_io + 1; | |
6757eca3 | 736 | sysfs_bin_attr_init(b->legacy_mem); |
f19aeb1f BH |
737 | b->legacy_mem->attr.name = "legacy_mem"; |
738 | b->legacy_mem->size = 1024*1024; | |
739 | b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR; | |
740 | b->legacy_mem->mmap = pci_mmap_legacy_mem; | |
10a0ef39 | 741 | pci_adjust_legacy_attr(b, pci_mmap_mem); |
f19aeb1f BH |
742 | error = device_create_bin_file(&b->dev, b->legacy_mem); |
743 | if (error) | |
744 | goto legacy_mem_err; | |
745 | ||
746 | return; | |
747 | ||
748 | legacy_mem_err: | |
749 | device_remove_bin_file(&b->dev, b->legacy_io); | |
750 | legacy_io_err: | |
751 | kfree(b->legacy_io); | |
752 | b->legacy_io = NULL; | |
753 | kzalloc_err: | |
754 | printk(KERN_WARNING "pci: warning: could not create legacy I/O port " | |
755 | "and ISA memory resources to sysfs\n"); | |
756 | return; | |
757 | } | |
758 | ||
759 | void pci_remove_legacy_files(struct pci_bus *b) | |
760 | { | |
761 | if (b->legacy_io) { | |
762 | device_remove_bin_file(&b->dev, b->legacy_io); | |
763 | device_remove_bin_file(&b->dev, b->legacy_mem); | |
764 | kfree(b->legacy_io); /* both are allocated here */ | |
765 | } | |
1da177e4 LT |
766 | } |
767 | #endif /* HAVE_PCI_LEGACY */ | |
768 | ||
769 | #ifdef HAVE_PCI_MMAP | |
b5ff7df3 | 770 | |
3b519e4e MW |
771 | int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma, |
772 | enum pci_mmap_api mmap_api) | |
b5ff7df3 | 773 | { |
3b519e4e | 774 | unsigned long nr, start, size, pci_start; |
b5ff7df3 | 775 | |
3b519e4e MW |
776 | if (pci_resource_len(pdev, resno) == 0) |
777 | return 0; | |
b5ff7df3 LT |
778 | nr = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; |
779 | start = vma->vm_pgoff; | |
88e7df0b | 780 | size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1; |
8c05cd08 | 781 | pci_start = (mmap_api == PCI_MMAP_PROCFS) ? |
3b519e4e MW |
782 | pci_resource_start(pdev, resno) >> PAGE_SHIFT : 0; |
783 | if (start >= pci_start && start < pci_start + size && | |
784 | start + nr <= pci_start + size) | |
b5ff7df3 | 785 | return 1; |
b5ff7df3 LT |
786 | return 0; |
787 | } | |
788 | ||
1da177e4 LT |
789 | /** |
790 | * pci_mmap_resource - map a PCI resource into user memory space | |
791 | * @kobj: kobject for mapping | |
792 | * @attr: struct bin_attribute for the file being mapped | |
793 | * @vma: struct vm_area_struct passed into the mmap | |
45aec1ae | 794 | * @write_combine: 1 for write_combine mapping |
1da177e4 LT |
795 | * |
796 | * Use the regular PCI mapping routines to map a PCI resource into userspace. | |
1da177e4 LT |
797 | */ |
798 | static int | |
799 | pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr, | |
45aec1ae | 800 | struct vm_area_struct *vma, int write_combine) |
1da177e4 LT |
801 | { |
802 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, | |
803 | struct device, kobj)); | |
a3f5835a | 804 | struct resource *res = attr->private; |
1da177e4 | 805 | enum pci_mmap_state mmap_type; |
e31dd6e4 | 806 | resource_size_t start, end; |
2311b1f2 | 807 | int i; |
1da177e4 | 808 | |
2311b1f2 ME |
809 | for (i = 0; i < PCI_ROM_RESOURCE; i++) |
810 | if (res == &pdev->resource[i]) | |
811 | break; | |
812 | if (i >= PCI_ROM_RESOURCE) | |
813 | return -ENODEV; | |
814 | ||
3b519e4e MW |
815 | if (!pci_mmap_fits(pdev, i, vma, PCI_MMAP_SYSFS)) { |
816 | WARN(1, "process \"%s\" tried to map 0x%08lx bytes " | |
817 | "at page 0x%08lx on %s BAR %d (start 0x%16Lx, size 0x%16Lx)\n", | |
818 | current->comm, vma->vm_end-vma->vm_start, vma->vm_pgoff, | |
819 | pci_name(pdev), i, | |
e25cd062 RD |
820 | (u64)pci_resource_start(pdev, i), |
821 | (u64)pci_resource_len(pdev, i)); | |
b5ff7df3 | 822 | return -EINVAL; |
3b519e4e | 823 | } |
b5ff7df3 | 824 | |
2311b1f2 ME |
825 | /* pci_mmap_page_range() expects the same kind of entry as coming |
826 | * from /proc/bus/pci/ which is a "user visible" value. If this is | |
827 | * different from the resource itself, arch will do necessary fixup. | |
828 | */ | |
829 | pci_resource_to_user(pdev, i, res, &start, &end); | |
830 | vma->vm_pgoff += start >> PAGE_SHIFT; | |
1da177e4 LT |
831 | mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io; |
832 | ||
e8de1481 AV |
833 | if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(start)) |
834 | return -EINVAL; | |
835 | ||
45aec1ae | 836 | return pci_mmap_page_range(pdev, vma, mmap_type, write_combine); |
837 | } | |
838 | ||
839 | static int | |
2c3c8bea CW |
840 | pci_mmap_resource_uc(struct file *filp, struct kobject *kobj, |
841 | struct bin_attribute *attr, | |
45aec1ae | 842 | struct vm_area_struct *vma) |
843 | { | |
844 | return pci_mmap_resource(kobj, attr, vma, 0); | |
845 | } | |
846 | ||
847 | static int | |
2c3c8bea CW |
848 | pci_mmap_resource_wc(struct file *filp, struct kobject *kobj, |
849 | struct bin_attribute *attr, | |
45aec1ae | 850 | struct vm_area_struct *vma) |
851 | { | |
852 | return pci_mmap_resource(kobj, attr, vma, 1); | |
1da177e4 LT |
853 | } |
854 | ||
8633328b AW |
855 | static ssize_t |
856 | pci_resource_io(struct file *filp, struct kobject *kobj, | |
857 | struct bin_attribute *attr, char *buf, | |
858 | loff_t off, size_t count, bool write) | |
859 | { | |
860 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, | |
861 | struct device, kobj)); | |
862 | struct resource *res = attr->private; | |
863 | unsigned long port = off; | |
864 | int i; | |
865 | ||
866 | for (i = 0; i < PCI_ROM_RESOURCE; i++) | |
867 | if (res == &pdev->resource[i]) | |
868 | break; | |
869 | if (i >= PCI_ROM_RESOURCE) | |
870 | return -ENODEV; | |
871 | ||
872 | port += pci_resource_start(pdev, i); | |
873 | ||
874 | if (port > pci_resource_end(pdev, i)) | |
875 | return 0; | |
876 | ||
877 | if (port + count - 1 > pci_resource_end(pdev, i)) | |
878 | return -EINVAL; | |
879 | ||
880 | switch (count) { | |
881 | case 1: | |
882 | if (write) | |
883 | outb(*(u8 *)buf, port); | |
884 | else | |
885 | *(u8 *)buf = inb(port); | |
886 | return 1; | |
887 | case 2: | |
888 | if (write) | |
889 | outw(*(u16 *)buf, port); | |
890 | else | |
891 | *(u16 *)buf = inw(port); | |
892 | return 2; | |
893 | case 4: | |
894 | if (write) | |
895 | outl(*(u32 *)buf, port); | |
896 | else | |
897 | *(u32 *)buf = inl(port); | |
898 | return 4; | |
899 | } | |
900 | return -EINVAL; | |
901 | } | |
902 | ||
903 | static ssize_t | |
904 | pci_read_resource_io(struct file *filp, struct kobject *kobj, | |
905 | struct bin_attribute *attr, char *buf, | |
906 | loff_t off, size_t count) | |
907 | { | |
908 | return pci_resource_io(filp, kobj, attr, buf, off, count, false); | |
909 | } | |
910 | ||
911 | static ssize_t | |
912 | pci_write_resource_io(struct file *filp, struct kobject *kobj, | |
913 | struct bin_attribute *attr, char *buf, | |
914 | loff_t off, size_t count) | |
915 | { | |
916 | return pci_resource_io(filp, kobj, attr, buf, off, count, true); | |
917 | } | |
918 | ||
b19441af GKH |
919 | /** |
920 | * pci_remove_resource_files - cleanup resource files | |
cffb2faf | 921 | * @pdev: dev to cleanup |
b19441af | 922 | * |
cffb2faf | 923 | * If we created resource files for @pdev, remove them from sysfs and |
b19441af GKH |
924 | * free their resources. |
925 | */ | |
926 | static void | |
927 | pci_remove_resource_files(struct pci_dev *pdev) | |
928 | { | |
929 | int i; | |
930 | ||
931 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
932 | struct bin_attribute *res_attr; | |
933 | ||
934 | res_attr = pdev->res_attr[i]; | |
935 | if (res_attr) { | |
936 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
937 | kfree(res_attr); | |
938 | } | |
45aec1ae | 939 | |
940 | res_attr = pdev->res_attr_wc[i]; | |
941 | if (res_attr) { | |
942 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
943 | kfree(res_attr); | |
944 | } | |
b19441af GKH |
945 | } |
946 | } | |
947 | ||
45aec1ae | 948 | static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine) |
949 | { | |
950 | /* allocate attribute structure, piggyback attribute name */ | |
951 | int name_len = write_combine ? 13 : 10; | |
952 | struct bin_attribute *res_attr; | |
953 | int retval; | |
954 | ||
955 | res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC); | |
956 | if (res_attr) { | |
957 | char *res_attr_name = (char *)(res_attr + 1); | |
958 | ||
a07e4156 | 959 | sysfs_bin_attr_init(res_attr); |
45aec1ae | 960 | if (write_combine) { |
961 | pdev->res_attr_wc[num] = res_attr; | |
962 | sprintf(res_attr_name, "resource%d_wc", num); | |
963 | res_attr->mmap = pci_mmap_resource_wc; | |
964 | } else { | |
965 | pdev->res_attr[num] = res_attr; | |
966 | sprintf(res_attr_name, "resource%d", num); | |
967 | res_attr->mmap = pci_mmap_resource_uc; | |
968 | } | |
8633328b AW |
969 | if (pci_resource_flags(pdev, num) & IORESOURCE_IO) { |
970 | res_attr->read = pci_read_resource_io; | |
971 | res_attr->write = pci_write_resource_io; | |
972 | } | |
45aec1ae | 973 | res_attr->attr.name = res_attr_name; |
974 | res_attr->attr.mode = S_IRUSR | S_IWUSR; | |
975 | res_attr->size = pci_resource_len(pdev, num); | |
976 | res_attr->private = &pdev->resource[num]; | |
977 | retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr); | |
978 | } else | |
979 | retval = -ENOMEM; | |
980 | ||
981 | return retval; | |
982 | } | |
983 | ||
1da177e4 LT |
984 | /** |
985 | * pci_create_resource_files - create resource files in sysfs for @dev | |
cffb2faf | 986 | * @pdev: dev in question |
1da177e4 | 987 | * |
cffb2faf | 988 | * Walk the resources in @pdev creating files for each resource available. |
1da177e4 | 989 | */ |
b19441af | 990 | static int pci_create_resource_files(struct pci_dev *pdev) |
1da177e4 LT |
991 | { |
992 | int i; | |
b19441af | 993 | int retval; |
1da177e4 LT |
994 | |
995 | /* Expose the PCI resources from this device as files */ | |
996 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
1da177e4 LT |
997 | |
998 | /* skip empty resources */ | |
999 | if (!pci_resource_len(pdev, i)) | |
1000 | continue; | |
1001 | ||
45aec1ae | 1002 | retval = pci_create_attr(pdev, i, 0); |
1003 | /* for prefetchable resources, create a WC mappable file */ | |
1004 | if (!retval && pdev->resource[i].flags & IORESOURCE_PREFETCH) | |
1005 | retval = pci_create_attr(pdev, i, 1); | |
1006 | ||
1007 | if (retval) { | |
1008 | pci_remove_resource_files(pdev); | |
1009 | return retval; | |
1da177e4 LT |
1010 | } |
1011 | } | |
b19441af | 1012 | return 0; |
1da177e4 LT |
1013 | } |
1014 | #else /* !HAVE_PCI_MMAP */ | |
10a0ef39 IK |
1015 | int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; } |
1016 | void __weak pci_remove_resource_files(struct pci_dev *dev) { return; } | |
1da177e4 LT |
1017 | #endif /* HAVE_PCI_MMAP */ |
1018 | ||
1019 | /** | |
1020 | * pci_write_rom - used to enable access to the PCI ROM display | |
2c3c8bea | 1021 | * @filp: sysfs file |
1da177e4 | 1022 | * @kobj: kernel object handle |
cffb2faf | 1023 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
1024 | * @buf: user input |
1025 | * @off: file offset | |
1026 | * @count: number of byte in input | |
1027 | * | |
1028 | * writing anything except 0 enables it | |
1029 | */ | |
1030 | static ssize_t | |
2c3c8bea CW |
1031 | pci_write_rom(struct file *filp, struct kobject *kobj, |
1032 | struct bin_attribute *bin_attr, | |
91a69029 | 1033 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
1034 | { |
1035 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj)); | |
1036 | ||
1037 | if ((off == 0) && (*buf == '0') && (count == 2)) | |
1038 | pdev->rom_attr_enabled = 0; | |
1039 | else | |
1040 | pdev->rom_attr_enabled = 1; | |
1041 | ||
1042 | return count; | |
1043 | } | |
1044 | ||
1045 | /** | |
1046 | * pci_read_rom - read a PCI ROM | |
2c3c8bea | 1047 | * @filp: sysfs file |
1da177e4 | 1048 | * @kobj: kernel object handle |
cffb2faf | 1049 | * @bin_attr: struct bin_attribute for this file |
1da177e4 LT |
1050 | * @buf: where to put the data we read from the ROM |
1051 | * @off: file offset | |
1052 | * @count: number of bytes to read | |
1053 | * | |
1054 | * Put @count bytes starting at @off into @buf from the ROM in the PCI | |
1055 | * device corresponding to @kobj. | |
1056 | */ | |
1057 | static ssize_t | |
2c3c8bea CW |
1058 | pci_read_rom(struct file *filp, struct kobject *kobj, |
1059 | struct bin_attribute *bin_attr, | |
91a69029 | 1060 | char *buf, loff_t off, size_t count) |
1da177e4 LT |
1061 | { |
1062 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj)); | |
1063 | void __iomem *rom; | |
1064 | size_t size; | |
1065 | ||
1066 | if (!pdev->rom_attr_enabled) | |
1067 | return -EINVAL; | |
1068 | ||
1069 | rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */ | |
97c44836 TN |
1070 | if (!rom || !size) |
1071 | return -EIO; | |
1da177e4 LT |
1072 | |
1073 | if (off >= size) | |
1074 | count = 0; | |
1075 | else { | |
1076 | if (off + count > size) | |
1077 | count = size - off; | |
1078 | ||
1079 | memcpy_fromio(buf, rom + off, count); | |
1080 | } | |
1081 | pci_unmap_rom(pdev, rom); | |
1082 | ||
1083 | return count; | |
1084 | } | |
1085 | ||
1086 | static struct bin_attribute pci_config_attr = { | |
1087 | .attr = { | |
1088 | .name = "config", | |
1089 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 1090 | }, |
557848c3 | 1091 | .size = PCI_CFG_SPACE_SIZE, |
1da177e4 LT |
1092 | .read = pci_read_config, |
1093 | .write = pci_write_config, | |
1094 | }; | |
1095 | ||
1096 | static struct bin_attribute pcie_config_attr = { | |
1097 | .attr = { | |
1098 | .name = "config", | |
1099 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 1100 | }, |
557848c3 | 1101 | .size = PCI_CFG_SPACE_EXP_SIZE, |
1da177e4 LT |
1102 | .read = pci_read_config, |
1103 | .write = pci_write_config, | |
1104 | }; | |
1105 | ||
a2cd52ca | 1106 | int __attribute__ ((weak)) pcibios_add_platform_entries(struct pci_dev *dev) |
575e3348 | 1107 | { |
a2cd52ca | 1108 | return 0; |
575e3348 ME |
1109 | } |
1110 | ||
711d5779 MT |
1111 | static ssize_t reset_store(struct device *dev, |
1112 | struct device_attribute *attr, const char *buf, | |
1113 | size_t count) | |
1114 | { | |
1115 | struct pci_dev *pdev = to_pci_dev(dev); | |
1116 | unsigned long val; | |
1117 | ssize_t result = strict_strtoul(buf, 0, &val); | |
1118 | ||
1119 | if (result < 0) | |
1120 | return result; | |
1121 | ||
1122 | if (val != 1) | |
1123 | return -EINVAL; | |
447c5dd7 MS |
1124 | |
1125 | result = pci_reset_function(pdev); | |
1126 | if (result < 0) | |
1127 | return result; | |
1128 | ||
1129 | return count; | |
711d5779 MT |
1130 | } |
1131 | ||
1132 | static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store); | |
1133 | ||
280c73d3 ZY |
1134 | static int pci_create_capabilities_sysfs(struct pci_dev *dev) |
1135 | { | |
1136 | int retval; | |
1137 | struct bin_attribute *attr; | |
1138 | ||
1139 | /* If the device has VPD, try to expose it in sysfs. */ | |
1140 | if (dev->vpd) { | |
1141 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); | |
1142 | if (!attr) | |
1143 | return -ENOMEM; | |
1144 | ||
a07e4156 | 1145 | sysfs_bin_attr_init(attr); |
280c73d3 ZY |
1146 | attr->size = dev->vpd->len; |
1147 | attr->attr.name = "vpd"; | |
1148 | attr->attr.mode = S_IRUSR | S_IWUSR; | |
287d19ce SH |
1149 | attr->read = read_vpd_attr; |
1150 | attr->write = write_vpd_attr; | |
280c73d3 ZY |
1151 | retval = sysfs_create_bin_file(&dev->dev.kobj, attr); |
1152 | if (retval) { | |
0f12a4e2 | 1153 | kfree(attr); |
280c73d3 ZY |
1154 | return retval; |
1155 | } | |
1156 | dev->vpd->attr = attr; | |
1157 | } | |
1158 | ||
1159 | /* Active State Power Management */ | |
1160 | pcie_aspm_create_sysfs_dev_files(dev); | |
1161 | ||
711d5779 MT |
1162 | if (!pci_probe_reset_function(dev)) { |
1163 | retval = device_create_file(&dev->dev, &reset_attr); | |
1164 | if (retval) | |
1165 | goto error; | |
1166 | dev->reset_fn = 1; | |
1167 | } | |
280c73d3 | 1168 | return 0; |
711d5779 MT |
1169 | |
1170 | error: | |
1171 | pcie_aspm_remove_sysfs_dev_files(dev); | |
1172 | if (dev->vpd && dev->vpd->attr) { | |
1173 | sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr); | |
1174 | kfree(dev->vpd->attr); | |
1175 | } | |
1176 | ||
1177 | return retval; | |
280c73d3 ZY |
1178 | } |
1179 | ||
b19441af | 1180 | int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev) |
1da177e4 | 1181 | { |
b19441af | 1182 | int retval; |
280c73d3 ZY |
1183 | int rom_size = 0; |
1184 | struct bin_attribute *attr; | |
b19441af | 1185 | |
1da177e4 LT |
1186 | if (!sysfs_initialized) |
1187 | return -EACCES; | |
1188 | ||
557848c3 | 1189 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
b19441af | 1190 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1da177e4 | 1191 | else |
b19441af GKH |
1192 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
1193 | if (retval) | |
1194 | goto err; | |
1da177e4 | 1195 | |
b19441af GKH |
1196 | retval = pci_create_resource_files(pdev); |
1197 | if (retval) | |
280c73d3 ZY |
1198 | goto err_config_file; |
1199 | ||
1200 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) | |
1201 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); | |
1202 | else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW) | |
1203 | rom_size = 0x20000; | |
1da177e4 LT |
1204 | |
1205 | /* If the device has a ROM, try to expose it in sysfs. */ | |
280c73d3 | 1206 | if (rom_size) { |
94e61088 | 1207 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); |
280c73d3 | 1208 | if (!attr) { |
b19441af | 1209 | retval = -ENOMEM; |
9890b12a | 1210 | goto err_resource_files; |
1da177e4 | 1211 | } |
a07e4156 | 1212 | sysfs_bin_attr_init(attr); |
280c73d3 ZY |
1213 | attr->size = rom_size; |
1214 | attr->attr.name = "rom"; | |
ff29530e | 1215 | attr->attr.mode = S_IRUSR | S_IWUSR; |
280c73d3 ZY |
1216 | attr->read = pci_read_rom; |
1217 | attr->write = pci_write_rom; | |
1218 | retval = sysfs_create_bin_file(&pdev->dev.kobj, attr); | |
1219 | if (retval) { | |
1220 | kfree(attr); | |
1221 | goto err_resource_files; | |
1222 | } | |
1223 | pdev->rom_attr = attr; | |
1da177e4 | 1224 | } |
280c73d3 | 1225 | |
217f45de DA |
1226 | if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) { |
1227 | retval = device_create_file(&pdev->dev, &vga_attr); | |
1228 | if (retval) | |
1229 | goto err_rom_file; | |
1230 | } | |
1231 | ||
1da177e4 | 1232 | /* add platform-specific attributes */ |
280c73d3 ZY |
1233 | retval = pcibios_add_platform_entries(pdev); |
1234 | if (retval) | |
217f45de | 1235 | goto err_vga_file; |
b19441af | 1236 | |
280c73d3 ZY |
1237 | /* add sysfs entries for various capabilities */ |
1238 | retval = pci_create_capabilities_sysfs(pdev); | |
1239 | if (retval) | |
217f45de | 1240 | goto err_vga_file; |
7d715a6c | 1241 | |
911e1c9b N |
1242 | pci_create_firmware_label_files(pdev); |
1243 | ||
1da177e4 | 1244 | return 0; |
b19441af | 1245 | |
217f45de DA |
1246 | err_vga_file: |
1247 | if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) | |
1248 | device_remove_file(&pdev->dev, &vga_attr); | |
a2cd52ca | 1249 | err_rom_file: |
280c73d3 | 1250 | if (rom_size) { |
94e61088 | 1251 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); |
280c73d3 ZY |
1252 | kfree(pdev->rom_attr); |
1253 | pdev->rom_attr = NULL; | |
1254 | } | |
9890b12a ME |
1255 | err_resource_files: |
1256 | pci_remove_resource_files(pdev); | |
94e61088 | 1257 | err_config_file: |
557848c3 | 1258 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
b19441af GKH |
1259 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1260 | else | |
1261 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); | |
1262 | err: | |
1263 | return retval; | |
1da177e4 LT |
1264 | } |
1265 | ||
280c73d3 ZY |
1266 | static void pci_remove_capabilities_sysfs(struct pci_dev *dev) |
1267 | { | |
1268 | if (dev->vpd && dev->vpd->attr) { | |
1269 | sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr); | |
1270 | kfree(dev->vpd->attr); | |
1271 | } | |
1272 | ||
1273 | pcie_aspm_remove_sysfs_dev_files(dev); | |
711d5779 MT |
1274 | if (dev->reset_fn) { |
1275 | device_remove_file(&dev->dev, &reset_attr); | |
1276 | dev->reset_fn = 0; | |
1277 | } | |
280c73d3 ZY |
1278 | } |
1279 | ||
1da177e4 LT |
1280 | /** |
1281 | * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files | |
1282 | * @pdev: device whose entries we should free | |
1283 | * | |
1284 | * Cleanup when @pdev is removed from sysfs. | |
1285 | */ | |
1286 | void pci_remove_sysfs_dev_files(struct pci_dev *pdev) | |
1287 | { | |
280c73d3 ZY |
1288 | int rom_size = 0; |
1289 | ||
d67afe5e DM |
1290 | if (!sysfs_initialized) |
1291 | return; | |
1292 | ||
280c73d3 | 1293 | pci_remove_capabilities_sysfs(pdev); |
7d715a6c | 1294 | |
557848c3 | 1295 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
1da177e4 LT |
1296 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1297 | else | |
1298 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); | |
1299 | ||
1300 | pci_remove_resource_files(pdev); | |
1301 | ||
280c73d3 ZY |
1302 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) |
1303 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); | |
1304 | else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW) | |
1305 | rom_size = 0x20000; | |
1306 | ||
1307 | if (rom_size && pdev->rom_attr) { | |
1308 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); | |
1309 | kfree(pdev->rom_attr); | |
1da177e4 | 1310 | } |
911e1c9b N |
1311 | |
1312 | pci_remove_firmware_label_files(pdev); | |
1313 | ||
1da177e4 LT |
1314 | } |
1315 | ||
1316 | static int __init pci_sysfs_init(void) | |
1317 | { | |
1318 | struct pci_dev *pdev = NULL; | |
b19441af GKH |
1319 | int retval; |
1320 | ||
1da177e4 | 1321 | sysfs_initialized = 1; |
b19441af GKH |
1322 | for_each_pci_dev(pdev) { |
1323 | retval = pci_create_sysfs_dev_files(pdev); | |
151fc5df JL |
1324 | if (retval) { |
1325 | pci_dev_put(pdev); | |
b19441af | 1326 | return retval; |
151fc5df | 1327 | } |
b19441af | 1328 | } |
1da177e4 LT |
1329 | |
1330 | return 0; | |
1331 | } | |
1332 | ||
40ee9e9f | 1333 | late_initcall(pci_sysfs_init); |