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> | |
aa0ac365 | 24 | #include <linux/capability.h> |
7d715a6c | 25 | #include <linux/pci-aspm.h> |
1da177e4 LT |
26 | #include "pci.h" |
27 | ||
28 | static int sysfs_initialized; /* = 0 */ | |
29 | ||
30 | /* show configuration fields */ | |
31 | #define pci_config_attr(field, format_string) \ | |
32 | static ssize_t \ | |
e404e274 | 33 | field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
34 | { \ |
35 | struct pci_dev *pdev; \ | |
36 | \ | |
37 | pdev = to_pci_dev (dev); \ | |
38 | return sprintf (buf, format_string, pdev->field); \ | |
39 | } | |
40 | ||
41 | pci_config_attr(vendor, "0x%04x\n"); | |
42 | pci_config_attr(device, "0x%04x\n"); | |
43 | pci_config_attr(subsystem_vendor, "0x%04x\n"); | |
44 | pci_config_attr(subsystem_device, "0x%04x\n"); | |
45 | pci_config_attr(class, "0x%06x\n"); | |
46 | pci_config_attr(irq, "%u\n"); | |
47 | ||
bdee9d98 DT |
48 | static ssize_t broken_parity_status_show(struct device *dev, |
49 | struct device_attribute *attr, | |
50 | char *buf) | |
51 | { | |
52 | struct pci_dev *pdev = to_pci_dev(dev); | |
53 | return sprintf (buf, "%u\n", pdev->broken_parity_status); | |
54 | } | |
55 | ||
56 | static ssize_t broken_parity_status_store(struct device *dev, | |
57 | struct device_attribute *attr, | |
58 | const char *buf, size_t count) | |
59 | { | |
60 | struct pci_dev *pdev = to_pci_dev(dev); | |
61 | ssize_t consumed = -EINVAL; | |
62 | ||
63 | if ((count > 0) && (*buf == '0' || *buf == '1')) { | |
64 | pdev->broken_parity_status = *buf == '1' ? 1 : 0; | |
65 | consumed = count; | |
66 | } | |
67 | return consumed; | |
68 | } | |
69 | ||
4327edf6 AC |
70 | static ssize_t local_cpus_show(struct device *dev, |
71 | struct device_attribute *attr, char *buf) | |
1da177e4 | 72 | { |
4327edf6 AC |
73 | cpumask_t mask; |
74 | int len; | |
75 | ||
76 | mask = pcibus_to_cpumask(to_pci_dev(dev)->bus); | |
29c0177e | 77 | len = cpumask_scnprintf(buf, PAGE_SIZE-2, &mask); |
39106dcf MT |
78 | buf[len++] = '\n'; |
79 | buf[len] = '\0'; | |
80 | return len; | |
81 | } | |
82 | ||
83 | ||
84 | static ssize_t local_cpulist_show(struct device *dev, | |
85 | struct device_attribute *attr, char *buf) | |
86 | { | |
87 | cpumask_t mask; | |
88 | int len; | |
89 | ||
90 | mask = pcibus_to_cpumask(to_pci_dev(dev)->bus); | |
29c0177e | 91 | len = cpulist_scnprintf(buf, PAGE_SIZE-2, &mask); |
39106dcf MT |
92 | buf[len++] = '\n'; |
93 | buf[len] = '\0'; | |
94 | return len; | |
1da177e4 LT |
95 | } |
96 | ||
97 | /* show resources */ | |
98 | static ssize_t | |
e404e274 | 99 | resource_show(struct device * dev, struct device_attribute *attr, char * buf) |
1da177e4 LT |
100 | { |
101 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
102 | char * str = buf; | |
103 | int i; | |
104 | int max = 7; | |
e31dd6e4 | 105 | resource_size_t start, end; |
1da177e4 LT |
106 | |
107 | if (pci_dev->subordinate) | |
108 | max = DEVICE_COUNT_RESOURCE; | |
109 | ||
110 | for (i = 0; i < max; i++) { | |
2311b1f2 ME |
111 | struct resource *res = &pci_dev->resource[i]; |
112 | pci_resource_to_user(pci_dev, i, res, &start, &end); | |
113 | str += sprintf(str,"0x%016llx 0x%016llx 0x%016llx\n", | |
114 | (unsigned long long)start, | |
115 | (unsigned long long)end, | |
116 | (unsigned long long)res->flags); | |
1da177e4 LT |
117 | } |
118 | return (str - buf); | |
119 | } | |
120 | ||
87c8a443 | 121 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) |
9888549e GK |
122 | { |
123 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
124 | ||
125 | return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n", | |
126 | pci_dev->vendor, pci_dev->device, | |
127 | pci_dev->subsystem_vendor, pci_dev->subsystem_device, | |
128 | (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8), | |
129 | (u8)(pci_dev->class)); | |
130 | } | |
bae94d02 IPG |
131 | |
132 | static ssize_t is_enabled_store(struct device *dev, | |
133 | struct device_attribute *attr, const char *buf, | |
134 | size_t count) | |
9f125d30 | 135 | { |
bae94d02 | 136 | ssize_t result = -EINVAL; |
9f125d30 AV |
137 | struct pci_dev *pdev = to_pci_dev(dev); |
138 | ||
139 | /* this can crash the machine when done on the "wrong" device */ | |
140 | if (!capable(CAP_SYS_ADMIN)) | |
141 | return count; | |
142 | ||
bae94d02 IPG |
143 | if (*buf == '0') { |
144 | if (atomic_read(&pdev->enable_cnt) != 0) | |
145 | pci_disable_device(pdev); | |
146 | else | |
147 | result = -EIO; | |
148 | } else if (*buf == '1') | |
149 | result = pci_enable_device(pdev); | |
9f125d30 | 150 | |
bae94d02 IPG |
151 | return result < 0 ? result : count; |
152 | } | |
153 | ||
154 | static ssize_t is_enabled_show(struct device *dev, | |
155 | struct device_attribute *attr, char *buf) | |
156 | { | |
157 | struct pci_dev *pdev; | |
9f125d30 | 158 | |
bae94d02 IPG |
159 | pdev = to_pci_dev (dev); |
160 | return sprintf (buf, "%u\n", atomic_read(&pdev->enable_cnt)); | |
9f125d30 AV |
161 | } |
162 | ||
81bb0e19 BG |
163 | #ifdef CONFIG_NUMA |
164 | static ssize_t | |
165 | numa_node_show(struct device *dev, struct device_attribute *attr, char *buf) | |
166 | { | |
167 | return sprintf (buf, "%d\n", dev->numa_node); | |
168 | } | |
169 | #endif | |
170 | ||
fe97064c BG |
171 | static ssize_t |
172 | msi_bus_show(struct device *dev, struct device_attribute *attr, char *buf) | |
173 | { | |
174 | struct pci_dev *pdev = to_pci_dev(dev); | |
175 | ||
176 | if (!pdev->subordinate) | |
177 | return 0; | |
178 | ||
179 | return sprintf (buf, "%u\n", | |
180 | !(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI)); | |
181 | } | |
182 | ||
183 | static ssize_t | |
184 | msi_bus_store(struct device *dev, struct device_attribute *attr, | |
185 | const char *buf, size_t count) | |
186 | { | |
187 | struct pci_dev *pdev = to_pci_dev(dev); | |
188 | ||
189 | /* bad things may happen if the no_msi flag is changed | |
190 | * while some drivers are loaded */ | |
191 | if (!capable(CAP_SYS_ADMIN)) | |
192 | return count; | |
193 | ||
194 | if (!pdev->subordinate) | |
195 | return count; | |
196 | ||
197 | if (*buf == '0') { | |
198 | pdev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI; | |
199 | dev_warn(&pdev->dev, "forced subordinate bus to not support MSI," | |
200 | " bad things could happen.\n"); | |
201 | } | |
202 | ||
203 | if (*buf == '1') { | |
204 | pdev->subordinate->bus_flags &= ~PCI_BUS_FLAGS_NO_MSI; | |
205 | dev_warn(&pdev->dev, "forced subordinate bus to support MSI," | |
206 | " bad things could happen.\n"); | |
207 | } | |
208 | ||
209 | return count; | |
210 | } | |
9888549e | 211 | |
1da177e4 LT |
212 | struct device_attribute pci_dev_attrs[] = { |
213 | __ATTR_RO(resource), | |
214 | __ATTR_RO(vendor), | |
215 | __ATTR_RO(device), | |
216 | __ATTR_RO(subsystem_vendor), | |
217 | __ATTR_RO(subsystem_device), | |
218 | __ATTR_RO(class), | |
219 | __ATTR_RO(irq), | |
220 | __ATTR_RO(local_cpus), | |
39106dcf | 221 | __ATTR_RO(local_cpulist), |
9888549e | 222 | __ATTR_RO(modalias), |
81bb0e19 BG |
223 | #ifdef CONFIG_NUMA |
224 | __ATTR_RO(numa_node), | |
225 | #endif | |
9f125d30 | 226 | __ATTR(enable, 0600, is_enabled_show, is_enabled_store), |
bdee9d98 DT |
227 | __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR), |
228 | broken_parity_status_show,broken_parity_status_store), | |
fe97064c | 229 | __ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store), |
1da177e4 LT |
230 | __ATTR_NULL, |
231 | }; | |
232 | ||
233 | static ssize_t | |
91a69029 ZR |
234 | pci_read_config(struct kobject *kobj, struct bin_attribute *bin_attr, |
235 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
236 | { |
237 | struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); | |
238 | unsigned int size = 64; | |
239 | loff_t init_off = off; | |
4c0619ad | 240 | u8 *data = (u8*) buf; |
1da177e4 LT |
241 | |
242 | /* Several chips lock up trying to read undefined config space */ | |
243 | if (capable(CAP_SYS_ADMIN)) { | |
244 | size = dev->cfg_size; | |
245 | } else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { | |
246 | size = 128; | |
247 | } | |
248 | ||
249 | if (off > size) | |
250 | return 0; | |
251 | if (off + count > size) { | |
252 | size -= off; | |
253 | count = size; | |
254 | } else { | |
255 | size = count; | |
256 | } | |
257 | ||
4c0619ad | 258 | if ((off & 1) && size) { |
259 | u8 val; | |
e04b0ea2 | 260 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 261 | data[off - init_off] = val; |
1da177e4 | 262 | off++; |
4c0619ad | 263 | size--; |
264 | } | |
265 | ||
266 | if ((off & 3) && size > 2) { | |
267 | u16 val; | |
e04b0ea2 | 268 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 269 | data[off - init_off] = val & 0xff; |
270 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
271 | off += 2; | |
272 | size -= 2; | |
1da177e4 LT |
273 | } |
274 | ||
275 | while (size > 3) { | |
4c0619ad | 276 | u32 val; |
e04b0ea2 | 277 | pci_user_read_config_dword(dev, off, &val); |
4c0619ad | 278 | data[off - init_off] = val & 0xff; |
279 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
280 | data[off - init_off + 2] = (val >> 16) & 0xff; | |
281 | data[off - init_off + 3] = (val >> 24) & 0xff; | |
1da177e4 LT |
282 | off += 4; |
283 | size -= 4; | |
284 | } | |
285 | ||
4c0619ad | 286 | if (size >= 2) { |
287 | u16 val; | |
e04b0ea2 | 288 | pci_user_read_config_word(dev, off, &val); |
4c0619ad | 289 | data[off - init_off] = val & 0xff; |
290 | data[off - init_off + 1] = (val >> 8) & 0xff; | |
291 | off += 2; | |
292 | size -= 2; | |
293 | } | |
294 | ||
295 | if (size > 0) { | |
296 | u8 val; | |
e04b0ea2 | 297 | pci_user_read_config_byte(dev, off, &val); |
4c0619ad | 298 | data[off - init_off] = val; |
1da177e4 LT |
299 | off++; |
300 | --size; | |
301 | } | |
302 | ||
303 | return count; | |
304 | } | |
305 | ||
306 | static ssize_t | |
91a69029 ZR |
307 | pci_write_config(struct kobject *kobj, struct bin_attribute *bin_attr, |
308 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
309 | { |
310 | struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); | |
311 | unsigned int size = count; | |
312 | loff_t init_off = off; | |
4c0619ad | 313 | u8 *data = (u8*) buf; |
1da177e4 LT |
314 | |
315 | if (off > dev->cfg_size) | |
316 | return 0; | |
317 | if (off + count > dev->cfg_size) { | |
318 | size = dev->cfg_size - off; | |
319 | count = size; | |
320 | } | |
4c0619ad | 321 | |
322 | if ((off & 1) && size) { | |
e04b0ea2 | 323 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 | 324 | off++; |
4c0619ad | 325 | size--; |
1da177e4 | 326 | } |
4c0619ad | 327 | |
328 | if ((off & 3) && size > 2) { | |
329 | u16 val = data[off - init_off]; | |
330 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 331 | pci_user_write_config_word(dev, off, val); |
4c0619ad | 332 | off += 2; |
333 | size -= 2; | |
334 | } | |
1da177e4 LT |
335 | |
336 | while (size > 3) { | |
4c0619ad | 337 | u32 val = data[off - init_off]; |
338 | val |= (u32) data[off - init_off + 1] << 8; | |
339 | val |= (u32) data[off - init_off + 2] << 16; | |
340 | val |= (u32) data[off - init_off + 3] << 24; | |
e04b0ea2 | 341 | pci_user_write_config_dword(dev, off, val); |
1da177e4 LT |
342 | off += 4; |
343 | size -= 4; | |
344 | } | |
4c0619ad | 345 | |
346 | if (size >= 2) { | |
347 | u16 val = data[off - init_off]; | |
348 | val |= (u16) data[off - init_off + 1] << 8; | |
e04b0ea2 | 349 | pci_user_write_config_word(dev, off, val); |
4c0619ad | 350 | off += 2; |
351 | size -= 2; | |
352 | } | |
1da177e4 | 353 | |
4c0619ad | 354 | if (size) { |
e04b0ea2 | 355 | pci_user_write_config_byte(dev, off, data[off - init_off]); |
1da177e4 LT |
356 | off++; |
357 | --size; | |
358 | } | |
359 | ||
360 | return count; | |
361 | } | |
362 | ||
94e61088 BH |
363 | static ssize_t |
364 | pci_read_vpd(struct kobject *kobj, struct bin_attribute *bin_attr, | |
365 | char *buf, loff_t off, size_t count) | |
366 | { | |
367 | struct pci_dev *dev = | |
368 | to_pci_dev(container_of(kobj, struct device, kobj)); | |
369 | int end; | |
370 | int ret; | |
371 | ||
372 | if (off > bin_attr->size) | |
373 | count = 0; | |
374 | else if (count > bin_attr->size - off) | |
375 | count = bin_attr->size - off; | |
376 | end = off + count; | |
377 | ||
378 | while (off < end) { | |
379 | ret = dev->vpd->ops->read(dev, off, end - off, buf); | |
380 | if (ret < 0) | |
381 | return ret; | |
382 | buf += ret; | |
383 | off += ret; | |
384 | } | |
385 | ||
386 | return count; | |
387 | } | |
388 | ||
389 | static ssize_t | |
390 | pci_write_vpd(struct kobject *kobj, struct bin_attribute *bin_attr, | |
391 | char *buf, loff_t off, size_t count) | |
392 | { | |
393 | struct pci_dev *dev = | |
394 | to_pci_dev(container_of(kobj, struct device, kobj)); | |
395 | int end; | |
396 | int ret; | |
397 | ||
398 | if (off > bin_attr->size) | |
399 | count = 0; | |
400 | else if (count > bin_attr->size - off) | |
401 | count = bin_attr->size - off; | |
402 | end = off + count; | |
403 | ||
404 | while (off < end) { | |
405 | ret = dev->vpd->ops->write(dev, off, end - off, buf); | |
406 | if (ret < 0) | |
407 | return ret; | |
408 | buf += ret; | |
409 | off += ret; | |
410 | } | |
411 | ||
412 | return count; | |
413 | } | |
414 | ||
1da177e4 LT |
415 | #ifdef HAVE_PCI_LEGACY |
416 | /** | |
417 | * pci_read_legacy_io - read byte(s) from legacy I/O port space | |
418 | * @kobj: kobject corresponding to file to read from | |
419 | * @buf: buffer to store results | |
420 | * @off: offset into legacy I/O port space | |
421 | * @count: number of bytes to read | |
422 | * | |
423 | * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
424 | * callback routine (pci_legacy_read). | |
425 | */ | |
f19aeb1f | 426 | static ssize_t |
91a69029 ZR |
427 | pci_read_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr, |
428 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
429 | { |
430 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 431 | struct device, |
1da177e4 LT |
432 | kobj)); |
433 | ||
434 | /* Only support 1, 2 or 4 byte accesses */ | |
435 | if (count != 1 && count != 2 && count != 4) | |
436 | return -EINVAL; | |
437 | ||
438 | return pci_legacy_read(bus, off, (u32 *)buf, count); | |
439 | } | |
440 | ||
441 | /** | |
442 | * pci_write_legacy_io - write byte(s) to legacy I/O port space | |
443 | * @kobj: kobject corresponding to file to read from | |
444 | * @buf: buffer containing value to be written | |
445 | * @off: offset into legacy I/O port space | |
446 | * @count: number of bytes to write | |
447 | * | |
448 | * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific | |
449 | * callback routine (pci_legacy_write). | |
450 | */ | |
f19aeb1f | 451 | static ssize_t |
91a69029 ZR |
452 | pci_write_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr, |
453 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
454 | { |
455 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 456 | struct device, |
1da177e4 LT |
457 | kobj)); |
458 | /* Only support 1, 2 or 4 byte accesses */ | |
459 | if (count != 1 && count != 2 && count != 4) | |
460 | return -EINVAL; | |
461 | ||
462 | return pci_legacy_write(bus, off, *(u32 *)buf, count); | |
463 | } | |
464 | ||
465 | /** | |
466 | * pci_mmap_legacy_mem - map legacy PCI memory into user memory space | |
467 | * @kobj: kobject corresponding to device to be mapped | |
468 | * @attr: struct bin_attribute for this file | |
469 | * @vma: struct vm_area_struct passed to mmap | |
470 | * | |
f19aeb1f | 471 | * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap |
1da177e4 LT |
472 | * legacy memory space (first meg of bus space) into application virtual |
473 | * memory space. | |
474 | */ | |
f19aeb1f | 475 | static int |
1da177e4 LT |
476 | pci_mmap_legacy_mem(struct kobject *kobj, struct bin_attribute *attr, |
477 | struct vm_area_struct *vma) | |
478 | { | |
479 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
fd7d1ced | 480 | struct device, |
1da177e4 LT |
481 | kobj)); |
482 | ||
f19aeb1f BH |
483 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem); |
484 | } | |
485 | ||
486 | /** | |
487 | * pci_mmap_legacy_io - map legacy PCI IO into user memory space | |
488 | * @kobj: kobject corresponding to device to be mapped | |
489 | * @attr: struct bin_attribute for this file | |
490 | * @vma: struct vm_area_struct passed to mmap | |
491 | * | |
492 | * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap | |
493 | * legacy IO space (first meg of bus space) into application virtual | |
494 | * memory space. Returns -ENOSYS if the operation isn't supported | |
495 | */ | |
496 | static int | |
497 | pci_mmap_legacy_io(struct kobject *kobj, struct bin_attribute *attr, | |
498 | struct vm_area_struct *vma) | |
499 | { | |
500 | struct pci_bus *bus = to_pci_bus(container_of(kobj, | |
501 | struct device, | |
502 | kobj)); | |
503 | ||
504 | return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io); | |
505 | } | |
506 | ||
507 | /** | |
508 | * pci_create_legacy_files - create legacy I/O port and memory files | |
509 | * @b: bus to create files under | |
510 | * | |
511 | * Some platforms allow access to legacy I/O port and ISA memory space on | |
512 | * a per-bus basis. This routine creates the files and ties them into | |
513 | * their associated read, write and mmap files from pci-sysfs.c | |
514 | * | |
515 | * On error unwind, but don't propogate the error to the caller | |
516 | * as it is ok to set up the PCI bus without these files. | |
517 | */ | |
518 | void pci_create_legacy_files(struct pci_bus *b) | |
519 | { | |
520 | int error; | |
521 | ||
522 | b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2, | |
523 | GFP_ATOMIC); | |
524 | if (!b->legacy_io) | |
525 | goto kzalloc_err; | |
526 | ||
527 | b->legacy_io->attr.name = "legacy_io"; | |
528 | b->legacy_io->size = 0xffff; | |
529 | b->legacy_io->attr.mode = S_IRUSR | S_IWUSR; | |
530 | b->legacy_io->read = pci_read_legacy_io; | |
531 | b->legacy_io->write = pci_write_legacy_io; | |
532 | b->legacy_io->mmap = pci_mmap_legacy_io; | |
533 | error = device_create_bin_file(&b->dev, b->legacy_io); | |
534 | if (error) | |
535 | goto legacy_io_err; | |
536 | ||
537 | /* Allocated above after the legacy_io struct */ | |
538 | b->legacy_mem = b->legacy_io + 1; | |
539 | b->legacy_mem->attr.name = "legacy_mem"; | |
540 | b->legacy_mem->size = 1024*1024; | |
541 | b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR; | |
542 | b->legacy_mem->mmap = pci_mmap_legacy_mem; | |
543 | error = device_create_bin_file(&b->dev, b->legacy_mem); | |
544 | if (error) | |
545 | goto legacy_mem_err; | |
546 | ||
547 | return; | |
548 | ||
549 | legacy_mem_err: | |
550 | device_remove_bin_file(&b->dev, b->legacy_io); | |
551 | legacy_io_err: | |
552 | kfree(b->legacy_io); | |
553 | b->legacy_io = NULL; | |
554 | kzalloc_err: | |
555 | printk(KERN_WARNING "pci: warning: could not create legacy I/O port " | |
556 | "and ISA memory resources to sysfs\n"); | |
557 | return; | |
558 | } | |
559 | ||
560 | void pci_remove_legacy_files(struct pci_bus *b) | |
561 | { | |
562 | if (b->legacy_io) { | |
563 | device_remove_bin_file(&b->dev, b->legacy_io); | |
564 | device_remove_bin_file(&b->dev, b->legacy_mem); | |
565 | kfree(b->legacy_io); /* both are allocated here */ | |
566 | } | |
1da177e4 LT |
567 | } |
568 | #endif /* HAVE_PCI_LEGACY */ | |
569 | ||
570 | #ifdef HAVE_PCI_MMAP | |
b5ff7df3 LT |
571 | |
572 | static int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma) | |
573 | { | |
574 | unsigned long nr, start, size; | |
575 | ||
576 | nr = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; | |
577 | start = vma->vm_pgoff; | |
88e7df0b | 578 | size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1; |
b5ff7df3 LT |
579 | if (start < size && size - start >= nr) |
580 | return 1; | |
581 | WARN(1, "process \"%s\" tried to map 0x%08lx-0x%08lx on %s BAR %d (size 0x%08lx)\n", | |
582 | current->comm, start, start+nr, pci_name(pdev), resno, size); | |
583 | return 0; | |
584 | } | |
585 | ||
1da177e4 LT |
586 | /** |
587 | * pci_mmap_resource - map a PCI resource into user memory space | |
588 | * @kobj: kobject for mapping | |
589 | * @attr: struct bin_attribute for the file being mapped | |
590 | * @vma: struct vm_area_struct passed into the mmap | |
45aec1ae | 591 | * @write_combine: 1 for write_combine mapping |
1da177e4 LT |
592 | * |
593 | * Use the regular PCI mapping routines to map a PCI resource into userspace. | |
1da177e4 LT |
594 | */ |
595 | static int | |
596 | pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr, | |
45aec1ae | 597 | struct vm_area_struct *vma, int write_combine) |
1da177e4 LT |
598 | { |
599 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, | |
600 | struct device, kobj)); | |
601 | struct resource *res = (struct resource *)attr->private; | |
602 | enum pci_mmap_state mmap_type; | |
e31dd6e4 | 603 | resource_size_t start, end; |
2311b1f2 | 604 | int i; |
1da177e4 | 605 | |
2311b1f2 ME |
606 | for (i = 0; i < PCI_ROM_RESOURCE; i++) |
607 | if (res == &pdev->resource[i]) | |
608 | break; | |
609 | if (i >= PCI_ROM_RESOURCE) | |
610 | return -ENODEV; | |
611 | ||
b5ff7df3 LT |
612 | if (!pci_mmap_fits(pdev, i, vma)) |
613 | return -EINVAL; | |
614 | ||
2311b1f2 ME |
615 | /* pci_mmap_page_range() expects the same kind of entry as coming |
616 | * from /proc/bus/pci/ which is a "user visible" value. If this is | |
617 | * different from the resource itself, arch will do necessary fixup. | |
618 | */ | |
619 | pci_resource_to_user(pdev, i, res, &start, &end); | |
620 | vma->vm_pgoff += start >> PAGE_SHIFT; | |
1da177e4 LT |
621 | mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io; |
622 | ||
45aec1ae | 623 | return pci_mmap_page_range(pdev, vma, mmap_type, write_combine); |
624 | } | |
625 | ||
626 | static int | |
627 | pci_mmap_resource_uc(struct kobject *kobj, struct bin_attribute *attr, | |
628 | struct vm_area_struct *vma) | |
629 | { | |
630 | return pci_mmap_resource(kobj, attr, vma, 0); | |
631 | } | |
632 | ||
633 | static int | |
634 | pci_mmap_resource_wc(struct kobject *kobj, struct bin_attribute *attr, | |
635 | struct vm_area_struct *vma) | |
636 | { | |
637 | return pci_mmap_resource(kobj, attr, vma, 1); | |
1da177e4 LT |
638 | } |
639 | ||
b19441af GKH |
640 | /** |
641 | * pci_remove_resource_files - cleanup resource files | |
642 | * @dev: dev to cleanup | |
643 | * | |
644 | * If we created resource files for @dev, remove them from sysfs and | |
645 | * free their resources. | |
646 | */ | |
647 | static void | |
648 | pci_remove_resource_files(struct pci_dev *pdev) | |
649 | { | |
650 | int i; | |
651 | ||
652 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
653 | struct bin_attribute *res_attr; | |
654 | ||
655 | res_attr = pdev->res_attr[i]; | |
656 | if (res_attr) { | |
657 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
658 | kfree(res_attr); | |
659 | } | |
45aec1ae | 660 | |
661 | res_attr = pdev->res_attr_wc[i]; | |
662 | if (res_attr) { | |
663 | sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); | |
664 | kfree(res_attr); | |
665 | } | |
b19441af GKH |
666 | } |
667 | } | |
668 | ||
45aec1ae | 669 | static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine) |
670 | { | |
671 | /* allocate attribute structure, piggyback attribute name */ | |
672 | int name_len = write_combine ? 13 : 10; | |
673 | struct bin_attribute *res_attr; | |
674 | int retval; | |
675 | ||
676 | res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC); | |
677 | if (res_attr) { | |
678 | char *res_attr_name = (char *)(res_attr + 1); | |
679 | ||
680 | if (write_combine) { | |
681 | pdev->res_attr_wc[num] = res_attr; | |
682 | sprintf(res_attr_name, "resource%d_wc", num); | |
683 | res_attr->mmap = pci_mmap_resource_wc; | |
684 | } else { | |
685 | pdev->res_attr[num] = res_attr; | |
686 | sprintf(res_attr_name, "resource%d", num); | |
687 | res_attr->mmap = pci_mmap_resource_uc; | |
688 | } | |
689 | res_attr->attr.name = res_attr_name; | |
690 | res_attr->attr.mode = S_IRUSR | S_IWUSR; | |
691 | res_attr->size = pci_resource_len(pdev, num); | |
692 | res_attr->private = &pdev->resource[num]; | |
693 | retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr); | |
694 | } else | |
695 | retval = -ENOMEM; | |
696 | ||
697 | return retval; | |
698 | } | |
699 | ||
1da177e4 LT |
700 | /** |
701 | * pci_create_resource_files - create resource files in sysfs for @dev | |
702 | * @dev: dev in question | |
703 | * | |
704 | * Walk the resources in @dev creating files for each resource available. | |
705 | */ | |
b19441af | 706 | static int pci_create_resource_files(struct pci_dev *pdev) |
1da177e4 LT |
707 | { |
708 | int i; | |
b19441af | 709 | int retval; |
1da177e4 LT |
710 | |
711 | /* Expose the PCI resources from this device as files */ | |
712 | for (i = 0; i < PCI_ROM_RESOURCE; i++) { | |
1da177e4 LT |
713 | |
714 | /* skip empty resources */ | |
715 | if (!pci_resource_len(pdev, i)) | |
716 | continue; | |
717 | ||
45aec1ae | 718 | retval = pci_create_attr(pdev, i, 0); |
719 | /* for prefetchable resources, create a WC mappable file */ | |
720 | if (!retval && pdev->resource[i].flags & IORESOURCE_PREFETCH) | |
721 | retval = pci_create_attr(pdev, i, 1); | |
722 | ||
723 | if (retval) { | |
724 | pci_remove_resource_files(pdev); | |
725 | return retval; | |
1da177e4 LT |
726 | } |
727 | } | |
b19441af | 728 | return 0; |
1da177e4 LT |
729 | } |
730 | #else /* !HAVE_PCI_MMAP */ | |
b19441af | 731 | static inline int pci_create_resource_files(struct pci_dev *dev) { return 0; } |
1da177e4 LT |
732 | static inline void pci_remove_resource_files(struct pci_dev *dev) { return; } |
733 | #endif /* HAVE_PCI_MMAP */ | |
734 | ||
735 | /** | |
736 | * pci_write_rom - used to enable access to the PCI ROM display | |
737 | * @kobj: kernel object handle | |
738 | * @buf: user input | |
739 | * @off: file offset | |
740 | * @count: number of byte in input | |
741 | * | |
742 | * writing anything except 0 enables it | |
743 | */ | |
744 | static ssize_t | |
91a69029 ZR |
745 | pci_write_rom(struct kobject *kobj, struct bin_attribute *bin_attr, |
746 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
747 | { |
748 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj)); | |
749 | ||
750 | if ((off == 0) && (*buf == '0') && (count == 2)) | |
751 | pdev->rom_attr_enabled = 0; | |
752 | else | |
753 | pdev->rom_attr_enabled = 1; | |
754 | ||
755 | return count; | |
756 | } | |
757 | ||
758 | /** | |
759 | * pci_read_rom - read a PCI ROM | |
760 | * @kobj: kernel object handle | |
761 | * @buf: where to put the data we read from the ROM | |
762 | * @off: file offset | |
763 | * @count: number of bytes to read | |
764 | * | |
765 | * Put @count bytes starting at @off into @buf from the ROM in the PCI | |
766 | * device corresponding to @kobj. | |
767 | */ | |
768 | static ssize_t | |
91a69029 ZR |
769 | pci_read_rom(struct kobject *kobj, struct bin_attribute *bin_attr, |
770 | char *buf, loff_t off, size_t count) | |
1da177e4 LT |
771 | { |
772 | struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj)); | |
773 | void __iomem *rom; | |
774 | size_t size; | |
775 | ||
776 | if (!pdev->rom_attr_enabled) | |
777 | return -EINVAL; | |
778 | ||
779 | rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */ | |
780 | if (!rom) | |
781 | return 0; | |
782 | ||
783 | if (off >= size) | |
784 | count = 0; | |
785 | else { | |
786 | if (off + count > size) | |
787 | count = size - off; | |
788 | ||
789 | memcpy_fromio(buf, rom + off, count); | |
790 | } | |
791 | pci_unmap_rom(pdev, rom); | |
792 | ||
793 | return count; | |
794 | } | |
795 | ||
796 | static struct bin_attribute pci_config_attr = { | |
797 | .attr = { | |
798 | .name = "config", | |
799 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 800 | }, |
557848c3 | 801 | .size = PCI_CFG_SPACE_SIZE, |
1da177e4 LT |
802 | .read = pci_read_config, |
803 | .write = pci_write_config, | |
804 | }; | |
805 | ||
806 | static struct bin_attribute pcie_config_attr = { | |
807 | .attr = { | |
808 | .name = "config", | |
809 | .mode = S_IRUGO | S_IWUSR, | |
1da177e4 | 810 | }, |
557848c3 | 811 | .size = PCI_CFG_SPACE_EXP_SIZE, |
1da177e4 LT |
812 | .read = pci_read_config, |
813 | .write = pci_write_config, | |
814 | }; | |
815 | ||
a2cd52ca | 816 | int __attribute__ ((weak)) pcibios_add_platform_entries(struct pci_dev *dev) |
575e3348 | 817 | { |
a2cd52ca | 818 | return 0; |
575e3348 ME |
819 | } |
820 | ||
280c73d3 ZY |
821 | static int pci_create_capabilities_sysfs(struct pci_dev *dev) |
822 | { | |
823 | int retval; | |
824 | struct bin_attribute *attr; | |
825 | ||
826 | /* If the device has VPD, try to expose it in sysfs. */ | |
827 | if (dev->vpd) { | |
828 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); | |
829 | if (!attr) | |
830 | return -ENOMEM; | |
831 | ||
832 | attr->size = dev->vpd->len; | |
833 | attr->attr.name = "vpd"; | |
834 | attr->attr.mode = S_IRUSR | S_IWUSR; | |
835 | attr->read = pci_read_vpd; | |
836 | attr->write = pci_write_vpd; | |
837 | retval = sysfs_create_bin_file(&dev->dev.kobj, attr); | |
838 | if (retval) { | |
839 | kfree(dev->vpd->attr); | |
840 | return retval; | |
841 | } | |
842 | dev->vpd->attr = attr; | |
843 | } | |
844 | ||
845 | /* Active State Power Management */ | |
846 | pcie_aspm_create_sysfs_dev_files(dev); | |
847 | ||
848 | return 0; | |
849 | } | |
850 | ||
b19441af | 851 | int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev) |
1da177e4 | 852 | { |
b19441af | 853 | int retval; |
280c73d3 ZY |
854 | int rom_size = 0; |
855 | struct bin_attribute *attr; | |
b19441af | 856 | |
1da177e4 LT |
857 | if (!sysfs_initialized) |
858 | return -EACCES; | |
859 | ||
557848c3 | 860 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
b19441af | 861 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr); |
1da177e4 | 862 | else |
b19441af GKH |
863 | retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
864 | if (retval) | |
865 | goto err; | |
1da177e4 | 866 | |
b19441af GKH |
867 | retval = pci_create_resource_files(pdev); |
868 | if (retval) | |
280c73d3 ZY |
869 | goto err_config_file; |
870 | ||
871 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) | |
872 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); | |
873 | else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW) | |
874 | rom_size = 0x20000; | |
1da177e4 LT |
875 | |
876 | /* If the device has a ROM, try to expose it in sysfs. */ | |
280c73d3 | 877 | if (rom_size) { |
94e61088 | 878 | attr = kzalloc(sizeof(*attr), GFP_ATOMIC); |
280c73d3 | 879 | if (!attr) { |
b19441af | 880 | retval = -ENOMEM; |
9890b12a | 881 | goto err_resource_files; |
1da177e4 | 882 | } |
280c73d3 ZY |
883 | attr->size = rom_size; |
884 | attr->attr.name = "rom"; | |
885 | attr->attr.mode = S_IRUSR; | |
886 | attr->read = pci_read_rom; | |
887 | attr->write = pci_write_rom; | |
888 | retval = sysfs_create_bin_file(&pdev->dev.kobj, attr); | |
889 | if (retval) { | |
890 | kfree(attr); | |
891 | goto err_resource_files; | |
892 | } | |
893 | pdev->rom_attr = attr; | |
1da177e4 | 894 | } |
280c73d3 | 895 | |
1da177e4 | 896 | /* add platform-specific attributes */ |
280c73d3 ZY |
897 | retval = pcibios_add_platform_entries(pdev); |
898 | if (retval) | |
a2cd52ca | 899 | goto err_rom_file; |
b19441af | 900 | |
280c73d3 ZY |
901 | /* add sysfs entries for various capabilities */ |
902 | retval = pci_create_capabilities_sysfs(pdev); | |
903 | if (retval) | |
904 | goto err_rom_file; | |
7d715a6c | 905 | |
1da177e4 | 906 | return 0; |
b19441af | 907 | |
a2cd52ca | 908 | err_rom_file: |
280c73d3 | 909 | if (rom_size) { |
94e61088 | 910 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); |
280c73d3 ZY |
911 | kfree(pdev->rom_attr); |
912 | pdev->rom_attr = NULL; | |
913 | } | |
9890b12a ME |
914 | err_resource_files: |
915 | pci_remove_resource_files(pdev); | |
94e61088 | 916 | err_config_file: |
557848c3 | 917 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
b19441af GKH |
918 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); |
919 | else | |
920 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); | |
921 | err: | |
922 | return retval; | |
1da177e4 LT |
923 | } |
924 | ||
280c73d3 ZY |
925 | static void pci_remove_capabilities_sysfs(struct pci_dev *dev) |
926 | { | |
927 | if (dev->vpd && dev->vpd->attr) { | |
928 | sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr); | |
929 | kfree(dev->vpd->attr); | |
930 | } | |
931 | ||
932 | pcie_aspm_remove_sysfs_dev_files(dev); | |
933 | } | |
934 | ||
1da177e4 LT |
935 | /** |
936 | * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files | |
937 | * @pdev: device whose entries we should free | |
938 | * | |
939 | * Cleanup when @pdev is removed from sysfs. | |
940 | */ | |
941 | void pci_remove_sysfs_dev_files(struct pci_dev *pdev) | |
942 | { | |
280c73d3 ZY |
943 | int rom_size = 0; |
944 | ||
d67afe5e DM |
945 | if (!sysfs_initialized) |
946 | return; | |
947 | ||
280c73d3 | 948 | pci_remove_capabilities_sysfs(pdev); |
7d715a6c | 949 | |
557848c3 | 950 | if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) |
1da177e4 LT |
951 | sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); |
952 | else | |
953 | sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); | |
954 | ||
955 | pci_remove_resource_files(pdev); | |
956 | ||
280c73d3 ZY |
957 | if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) |
958 | rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); | |
959 | else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW) | |
960 | rom_size = 0x20000; | |
961 | ||
962 | if (rom_size && pdev->rom_attr) { | |
963 | sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); | |
964 | kfree(pdev->rom_attr); | |
1da177e4 LT |
965 | } |
966 | } | |
967 | ||
968 | static int __init pci_sysfs_init(void) | |
969 | { | |
970 | struct pci_dev *pdev = NULL; | |
b19441af GKH |
971 | int retval; |
972 | ||
1da177e4 | 973 | sysfs_initialized = 1; |
b19441af GKH |
974 | for_each_pci_dev(pdev) { |
975 | retval = pci_create_sysfs_dev_files(pdev); | |
151fc5df JL |
976 | if (retval) { |
977 | pci_dev_put(pdev); | |
b19441af | 978 | return retval; |
151fc5df | 979 | } |
b19441af | 980 | } |
1da177e4 LT |
981 | |
982 | return 0; | |
983 | } | |
984 | ||
40ee9e9f | 985 | late_initcall(pci_sysfs_init); |