blob: 05b78b16d20bdca1acb822e7654360102fb09072 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <linux/kernel.h>
Linus Torvaldsb5ff7df2008-10-02 18:52:51 -070019#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <linux/pci.h>
21#include <linux/stat.h>
Paul Gortmaker363c75d2011-05-27 09:37:25 -040022#include <linux/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include <linux/topology.h>
24#include <linux/mm.h>
Chris Wrightde139a32010-05-13 10:43:07 -070025#include <linux/fs.h>
Alexey Dobriyanaa0ac362007-07-15 23:40:39 -070026#include <linux/capability.h>
Chris Wrighta628e7b2011-02-14 17:21:49 -080027#include <linux/security.h>
Shaohua Li7d715a62008-02-25 09:46:41 +080028#include <linux/pci-aspm.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090029#include <linux/slab.h>
Matthew Garrett1a39b312012-04-16 16:26:02 -040030#include <linux/vgaarb.h>
Huang Ying448bd852012-06-23 10:23:51 +080031#include <linux/pm_runtime.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include "pci.h"
33
34static int sysfs_initialized; /* = 0 */
35
36/* show configuration fields */
37#define pci_config_attr(field, format_string) \
38static ssize_t \
Yani Ioannoue404e272005-05-17 06:42:58 -040039field##_show(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -070040{ \
41 struct pci_dev *pdev; \
42 \
43 pdev = to_pci_dev (dev); \
44 return sprintf (buf, format_string, pdev->field); \
45}
46
47pci_config_attr(vendor, "0x%04x\n");
48pci_config_attr(device, "0x%04x\n");
49pci_config_attr(subsystem_vendor, "0x%04x\n");
50pci_config_attr(subsystem_device, "0x%04x\n");
51pci_config_attr(class, "0x%06x\n");
52pci_config_attr(irq, "%u\n");
53
Doug Thompsonbdee9d92006-06-14 16:59:48 -070054static 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
62static 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);
Trent Piepho92425a42008-11-30 17:10:12 -080067 unsigned long val;
Doug Thompsonbdee9d92006-06-14 16:59:48 -070068
Trent Piepho92425a42008-11-30 17:10:12 -080069 if (strict_strtoul(buf, 0, &val) < 0)
70 return -EINVAL;
71
72 pdev->broken_parity_status = !!val;
73
74 return count;
Doug Thompsonbdee9d92006-06-14 16:59:48 -070075}
76
Alan Cox4327edf2005-09-10 00:25:49 -070077static ssize_t local_cpus_show(struct device *dev,
78 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -070079{
Mike Travis3be83052009-01-04 05:18:01 -080080 const struct cpumask *mask;
Alan Cox4327edf2005-09-10 00:25:49 -070081 int len;
82
Andreas Herrmanne0cd5162009-04-17 12:01:55 +020083#ifdef CONFIG_NUMA
David John6be954d2010-01-04 20:28:57 +053084 mask = (dev_to_node(dev) == -1) ? cpu_online_mask :
85 cpumask_of_node(dev_to_node(dev));
Andreas Herrmanne0cd5162009-04-17 12:01:55 +020086#else
Mike Travis3be83052009-01-04 05:18:01 -080087 mask = cpumask_of_pcibus(to_pci_dev(dev)->bus);
Andreas Herrmanne0cd5162009-04-17 12:01:55 +020088#endif
Mike Travis3be83052009-01-04 05:18:01 -080089 len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask);
Mike Travis39106dc2008-04-08 11:43:03 -070090 buf[len++] = '\n';
91 buf[len] = '\0';
92 return len;
93}
94
95
96static ssize_t local_cpulist_show(struct device *dev,
97 struct device_attribute *attr, char *buf)
98{
Mike Travis3be83052009-01-04 05:18:01 -080099 const struct cpumask *mask;
Mike Travis39106dc2008-04-08 11:43:03 -0700100 int len;
101
Andreas Herrmanne0cd5162009-04-17 12:01:55 +0200102#ifdef CONFIG_NUMA
David John6be954d2010-01-04 20:28:57 +0530103 mask = (dev_to_node(dev) == -1) ? cpu_online_mask :
104 cpumask_of_node(dev_to_node(dev));
Andreas Herrmanne0cd5162009-04-17 12:01:55 +0200105#else
Mike Travis3be83052009-01-04 05:18:01 -0800106 mask = cpumask_of_pcibus(to_pci_dev(dev)->bus);
Andreas Herrmanne0cd5162009-04-17 12:01:55 +0200107#endif
Mike Travis3be83052009-01-04 05:18:01 -0800108 len = cpulist_scnprintf(buf, PAGE_SIZE-2, mask);
Mike Travis39106dc2008-04-08 11:43:03 -0700109 buf[len++] = '\n';
110 buf[len] = '\0';
111 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112}
113
Yinghai Ludc2c2c92011-05-12 17:11:40 -0700114/*
115 * PCI Bus Class Devices
116 */
117static 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
134static 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
141static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148/* show resources */
149static ssize_t
Yani Ioannoue404e272005-05-17 06:42:58 -0400150resource_show(struct device * dev, struct device_attribute *attr, char * buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151{
152 struct pci_dev * pci_dev = to_pci_dev(dev);
153 char * str = buf;
154 int i;
Yu Zhaofde09c62008-11-22 02:39:32 +0800155 int max;
Greg Kroah-Hartmane31dd6e2006-06-12 17:06:02 -0700156 resource_size_t start, end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
158 if (pci_dev->subordinate)
159 max = DEVICE_COUNT_RESOURCE;
Yu Zhaofde09c62008-11-22 02:39:32 +0800160 else
161 max = PCI_BRIDGE_RESOURCES;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
163 for (i = 0; i < max; i++) {
Michael Ellerman2311b1f2005-05-13 17:44:10 +1000164 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 }
171 return (str - buf);
172}
173
Greg Kroah-Hartman87c8a442005-06-19 12:21:43 +0200174static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
Greg KH98885492005-05-05 11:57:25 -0700175{
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}
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -0800184
185static ssize_t is_enabled_store(struct device *dev,
186 struct device_attribute *attr, const char *buf,
187 size_t count)
Arjan van de Ven9f125d32006-04-29 10:59:08 +0200188{
189 struct pci_dev *pdev = to_pci_dev(dev);
Trent Piepho92425a42008-11-30 17:10:12 -0800190 unsigned long val;
191 ssize_t result = strict_strtoul(buf, 0, &val);
192
193 if (result < 0)
194 return result;
Arjan van de Ven9f125d32006-04-29 10:59:08 +0200195
196 /* this can crash the machine when done on the "wrong" device */
197 if (!capable(CAP_SYS_ADMIN))
Trent Piepho92425a42008-11-30 17:10:12 -0800198 return -EPERM;
Arjan van de Ven9f125d32006-04-29 10:59:08 +0200199
Trent Piepho92425a42008-11-30 17:10:12 -0800200 if (!val) {
Yuji Shimada296ccb02009-04-03 16:41:46 +0900201 if (pci_is_enabled(pdev))
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -0800202 pci_disable_device(pdev);
203 else
204 result = -EIO;
Trent Piepho92425a42008-11-30 17:10:12 -0800205 } else
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -0800206 result = pci_enable_device(pdev);
Arjan van de Ven9f125d32006-04-29 10:59:08 +0200207
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -0800208 return result < 0 ? result : count;
209}
Arjan van de Ven9f125d32006-04-29 10:59:08 +0200210
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -0800211static ssize_t is_enabled_show(struct device *dev,
212 struct device_attribute *attr, char *buf)
213{
214 struct pci_dev *pdev;
215
216 pdev = to_pci_dev (dev);
217 return sprintf (buf, "%u\n", atomic_read(&pdev->enable_cnt));
Arjan van de Ven9f125d32006-04-29 10:59:08 +0200218}
219
Brice Goglin81bb0e12007-01-28 10:53:40 +0100220#ifdef CONFIG_NUMA
221static ssize_t
222numa_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
Brice Goglinfe970642006-08-31 01:55:15 -0400228static ssize_t
Yinghai Lubb965402009-11-24 18:21:21 -0800229dma_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
236static ssize_t
237consistent_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
243static ssize_t
Brice Goglinfe970642006-08-31 01:55:15 -0400244msi_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
255static ssize_t
256msi_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);
Trent Piepho92425a42008-11-30 17:10:12 -0800260 unsigned long val;
261
262 if (strict_strtoul(buf, 0, &val) < 0)
263 return -EINVAL;
Brice Goglinfe970642006-08-31 01:55:15 -0400264
265 /* bad things may happen if the no_msi flag is changed
266 * while some drivers are loaded */
267 if (!capable(CAP_SYS_ADMIN))
Trent Piepho92425a42008-11-30 17:10:12 -0800268 return -EPERM;
Brice Goglinfe970642006-08-31 01:55:15 -0400269
Trent Piepho92425a42008-11-30 17:10:12 -0800270 /* Maybe pci devices without subordinate busses shouldn't even have this
271 * attribute in the first place? */
Brice Goglinfe970642006-08-31 01:55:15 -0400272 if (!pdev->subordinate)
273 return count;
274
Trent Piepho92425a42008-11-30 17:10:12 -0800275 /* 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;
Brice Goglinfe970642006-08-31 01:55:15 -0400279
Trent Piepho92425a42008-11-30 17:10:12 -0800280 dev_warn(&pdev->dev, "forced subordinate bus to%s support MSI,"
281 " bad things could happen\n", val ? "" : " not");
Brice Goglinfe970642006-08-31 01:55:15 -0400282 }
283
284 return count;
285}
Greg KH98885492005-05-05 11:57:25 -0700286
Alex Chiang705b1aa2009-03-20 14:56:31 -0600287static DEFINE_MUTEX(pci_remove_rescan_mutex);
288static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf,
289 size_t count)
290{
291 unsigned long val;
292 struct pci_bus *b = NULL;
293
294 if (strict_strtoul(buf, 0, &val) < 0)
295 return -EINVAL;
296
297 if (val) {
298 mutex_lock(&pci_remove_rescan_mutex);
299 while ((b = pci_find_next_bus(b)) != NULL)
300 pci_rescan_bus(b);
301 mutex_unlock(&pci_remove_rescan_mutex);
302 }
303 return count;
304}
305
306struct bus_attribute pci_bus_attrs[] = {
307 __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store),
308 __ATTR_NULL
309};
Alex Chiang77c27c72009-03-20 14:56:36 -0600310
Alex Chiang738a6392009-03-20 14:56:41 -0600311static ssize_t
312dev_rescan_store(struct device *dev, struct device_attribute *attr,
313 const char *buf, size_t count)
314{
315 unsigned long val;
316 struct pci_dev *pdev = to_pci_dev(dev);
317
318 if (strict_strtoul(buf, 0, &val) < 0)
319 return -EINVAL;
320
321 if (val) {
322 mutex_lock(&pci_remove_rescan_mutex);
323 pci_rescan_bus(pdev->bus);
324 mutex_unlock(&pci_remove_rescan_mutex);
325 }
326 return count;
327}
328
Alex Chiang77c27c72009-03-20 14:56:36 -0600329static void remove_callback(struct device *dev)
330{
331 struct pci_dev *pdev = to_pci_dev(dev);
332
333 mutex_lock(&pci_remove_rescan_mutex);
Yinghai Lu210647a2012-02-25 13:54:20 -0800334 pci_stop_and_remove_bus_device(pdev);
Alex Chiang77c27c72009-03-20 14:56:36 -0600335 mutex_unlock(&pci_remove_rescan_mutex);
336}
337
338static ssize_t
339remove_store(struct device *dev, struct device_attribute *dummy,
340 const char *buf, size_t count)
341{
342 int ret = 0;
343 unsigned long val;
Alex Chiang77c27c72009-03-20 14:56:36 -0600344
345 if (strict_strtoul(buf, 0, &val) < 0)
346 return -EINVAL;
347
Alex Chiang77c27c72009-03-20 14:56:36 -0600348 /* An attribute cannot be unregistered by one of its own methods,
349 * so we have to use this roundabout approach.
350 */
351 if (val)
352 ret = device_schedule_callback(dev, remove_callback);
353 if (ret)
354 count = ret;
355 return count;
356}
Yinghai Lub9d320f2011-05-12 17:11:39 -0700357
358static ssize_t
359dev_bus_rescan_store(struct device *dev, struct device_attribute *attr,
360 const char *buf, size_t count)
361{
362 unsigned long val;
363 struct pci_bus *bus = to_pci_bus(dev);
364
365 if (strict_strtoul(buf, 0, &val) < 0)
366 return -EINVAL;
367
368 if (val) {
369 mutex_lock(&pci_remove_rescan_mutex);
Yinghai Lu2f320522012-01-21 02:08:22 -0800370 if (!pci_is_root_bus(bus) && list_empty(&bus->devices))
371 pci_rescan_bus_bridge_resize(bus->self);
372 else
373 pci_rescan_bus(bus);
Yinghai Lub9d320f2011-05-12 17:11:39 -0700374 mutex_unlock(&pci_remove_rescan_mutex);
375 }
376 return count;
377}
378
Huang Ying448bd852012-06-23 10:23:51 +0800379#if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI)
380static ssize_t d3cold_allowed_store(struct device *dev,
381 struct device_attribute *attr,
382 const char *buf, size_t count)
383{
384 struct pci_dev *pdev = to_pci_dev(dev);
385 unsigned long val;
386
387 if (strict_strtoul(buf, 0, &val) < 0)
388 return -EINVAL;
389
390 pdev->d3cold_allowed = !!val;
391 pm_runtime_resume(dev);
392
393 return count;
394}
395
396static ssize_t d3cold_allowed_show(struct device *dev,
397 struct device_attribute *attr, char *buf)
398{
399 struct pci_dev *pdev = to_pci_dev(dev);
400 return sprintf (buf, "%u\n", pdev->d3cold_allowed);
401}
402#endif
403
Donald Dutile17893822012-11-05 15:20:36 -0500404#ifdef CONFIG_PCI_IOV
405static ssize_t sriov_totalvfs_show(struct device *dev,
406 struct device_attribute *attr,
407 char *buf)
408{
409 struct pci_dev *pdev = to_pci_dev(dev);
410
Donald Dutilebff73152012-11-05 15:20:37 -0500411 return sprintf(buf, "%u\n", pci_sriov_get_totalvfs(pdev));
Donald Dutile17893822012-11-05 15:20:36 -0500412}
413
414
415static ssize_t sriov_numvfs_show(struct device *dev,
416 struct device_attribute *attr,
417 char *buf)
418{
419 struct pci_dev *pdev = to_pci_dev(dev);
420
Bjorn Helgaas6b136722012-11-09 20:27:53 -0700421 return sprintf(buf, "%u\n", pdev->sriov->num_VFs);
Donald Dutile17893822012-11-05 15:20:36 -0500422}
423
424/*
425 * num_vfs > 0; number of vfs to enable
426 * num_vfs = 0; disable all vfs
427 *
428 * Note: SRIOV spec doesn't allow partial VF
429 * disable, so its all or none.
430 */
431static ssize_t sriov_numvfs_store(struct device *dev,
432 struct device_attribute *attr,
433 const char *buf, size_t count)
434{
435 struct pci_dev *pdev = to_pci_dev(dev);
436 int num_vfs_enabled = 0;
437 int num_vfs;
438 int ret = 0;
439 u16 total;
440
441 if (kstrtoint(buf, 0, &num_vfs) < 0)
442 return -EINVAL;
443
444 /* is PF driver loaded w/callback */
445 if (!pdev->driver || !pdev->driver->sriov_configure) {
446 dev_info(&pdev->dev,
447 "Driver doesn't support SRIOV configuration via sysfs\n");
448 return -ENOSYS;
449 }
450
451 /* if enabling vf's ... */
Donald Dutilebff73152012-11-05 15:20:37 -0500452 total = pci_sriov_get_totalvfs(pdev);
Donald Dutile17893822012-11-05 15:20:36 -0500453 /* Requested VFs to enable < totalvfs and none enabled already */
454 if ((num_vfs > 0) && (num_vfs <= total)) {
Bjorn Helgaas6b136722012-11-09 20:27:53 -0700455 if (pdev->sriov->num_VFs == 0) {
Donald Dutile17893822012-11-05 15:20:36 -0500456 num_vfs_enabled =
457 pdev->driver->sriov_configure(pdev, num_vfs);
458 if ((num_vfs_enabled >= 0) &&
459 (num_vfs_enabled != num_vfs)) {
460 dev_warn(&pdev->dev,
461 "Only %d VFs enabled\n",
462 num_vfs_enabled);
463 return count;
464 } else if (num_vfs_enabled < 0)
465 /* error code from driver callback */
466 return num_vfs_enabled;
Bjorn Helgaas6b136722012-11-09 20:27:53 -0700467 } else if (num_vfs == pdev->sriov->num_VFs) {
Donald Dutile17893822012-11-05 15:20:36 -0500468 dev_warn(&pdev->dev,
469 "%d VFs already enabled; no enable action taken\n",
470 num_vfs);
471 return count;
472 } else {
473 dev_warn(&pdev->dev,
474 "%d VFs already enabled. Disable before enabling %d VFs\n",
Bjorn Helgaas6b136722012-11-09 20:27:53 -0700475 pdev->sriov->num_VFs, num_vfs);
Donald Dutile17893822012-11-05 15:20:36 -0500476 return -EINVAL;
477 }
478 }
479
480 /* disable vfs */
481 if (num_vfs == 0) {
Bjorn Helgaas6b136722012-11-09 20:27:53 -0700482 if (pdev->sriov->num_VFs != 0) {
Donald Dutile17893822012-11-05 15:20:36 -0500483 ret = pdev->driver->sriov_configure(pdev, 0);
484 return ret ? ret : count;
485 } else {
486 dev_warn(&pdev->dev,
487 "All VFs disabled; no disable action taken\n");
488 return count;
489 }
490 }
491
492 dev_err(&pdev->dev,
493 "Invalid value for number of VFs to enable: %d\n", num_vfs);
494
495 return -EINVAL;
496}
497
498static struct device_attribute sriov_totalvfs_attr = __ATTR_RO(sriov_totalvfs);
499static struct device_attribute sriov_numvfs_attr =
500 __ATTR(sriov_numvfs, (S_IRUGO|S_IWUSR|S_IWGRP),
501 sriov_numvfs_show, sriov_numvfs_store);
502#endif /* CONFIG_PCI_IOV */
503
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504struct device_attribute pci_dev_attrs[] = {
505 __ATTR_RO(resource),
506 __ATTR_RO(vendor),
507 __ATTR_RO(device),
508 __ATTR_RO(subsystem_vendor),
509 __ATTR_RO(subsystem_device),
510 __ATTR_RO(class),
511 __ATTR_RO(irq),
512 __ATTR_RO(local_cpus),
Mike Travis39106dc2008-04-08 11:43:03 -0700513 __ATTR_RO(local_cpulist),
Greg KH98885492005-05-05 11:57:25 -0700514 __ATTR_RO(modalias),
Brice Goglin81bb0e12007-01-28 10:53:40 +0100515#ifdef CONFIG_NUMA
516 __ATTR_RO(numa_node),
517#endif
Yinghai Lubb965402009-11-24 18:21:21 -0800518 __ATTR_RO(dma_mask_bits),
519 __ATTR_RO(consistent_dma_mask_bits),
Arjan van de Ven9f125d32006-04-29 10:59:08 +0200520 __ATTR(enable, 0600, is_enabled_show, is_enabled_store),
Doug Thompsonbdee9d92006-06-14 16:59:48 -0700521 __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR),
522 broken_parity_status_show,broken_parity_status_store),
Brice Goglinfe970642006-08-31 01:55:15 -0400523 __ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store),
Alex Chiang77c27c72009-03-20 14:56:36 -0600524 __ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store),
Alex Chiang738a6392009-03-20 14:56:41 -0600525 __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store),
Huang Ying448bd852012-06-23 10:23:51 +0800526#if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI)
527 __ATTR(d3cold_allowed, 0644, d3cold_allowed_show, d3cold_allowed_store),
528#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 __ATTR_NULL,
530};
531
Yinghai Lub9d320f2011-05-12 17:11:39 -0700532struct device_attribute pcibus_dev_attrs[] = {
Yinghai Lub9d320f2011-05-12 17:11:39 -0700533 __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store),
Yinghai Ludc2c2c92011-05-12 17:11:40 -0700534 __ATTR(cpuaffinity, S_IRUGO, pci_bus_show_cpumaskaffinity, NULL),
535 __ATTR(cpulistaffinity, S_IRUGO, pci_bus_show_cpulistaffinity, NULL),
Yinghai Lub9d320f2011-05-12 17:11:39 -0700536 __ATTR_NULL,
537};
538
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539static ssize_t
Dave Airlie217f45d2009-03-04 05:57:05 +0000540boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf)
541{
542 struct pci_dev *pdev = to_pci_dev(dev);
Matthew Garrett1a39b312012-04-16 16:26:02 -0400543 struct pci_dev *vga_dev = vga_default_device();
544
545 if (vga_dev)
546 return sprintf(buf, "%u\n", (pdev == vga_dev));
Dave Airlie217f45d2009-03-04 05:57:05 +0000547
548 return sprintf(buf, "%u\n",
549 !!(pdev->resource[PCI_ROM_RESOURCE].flags &
550 IORESOURCE_ROM_SHADOW));
551}
552struct device_attribute vga_attr = __ATTR_RO(boot_vga);
553
554static ssize_t
Chris Wright2c3c8be2010-05-12 18:28:57 -0700555pci_read_config(struct file *filp, struct kobject *kobj,
556 struct bin_attribute *bin_attr,
Zhang Rui91a69022007-06-09 13:57:22 +0800557 char *buf, loff_t off, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558{
559 struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
560 unsigned int size = 64;
561 loff_t init_off = off;
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900562 u8 *data = (u8*) buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563
564 /* Several chips lock up trying to read undefined config space */
Eric Parisb7e724d2012-01-03 12:25:15 -0500565 if (security_capable(filp->f_cred, &init_user_ns, CAP_SYS_ADMIN) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 size = dev->cfg_size;
567 } else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
568 size = 128;
569 }
570
571 if (off > size)
572 return 0;
573 if (off + count > size) {
574 size -= off;
575 count = size;
576 } else {
577 size = count;
578 }
579
Huang Ying3d8387e2012-08-15 09:43:03 +0800580 pci_config_pm_runtime_get(dev);
581
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900582 if ((off & 1) && size) {
583 u8 val;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700584 pci_user_read_config_byte(dev, off, &val);
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900585 data[off - init_off] = val;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 off++;
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900587 size--;
588 }
589
590 if ((off & 3) && size > 2) {
591 u16 val;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700592 pci_user_read_config_word(dev, off, &val);
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900593 data[off - init_off] = val & 0xff;
594 data[off - init_off + 1] = (val >> 8) & 0xff;
595 off += 2;
596 size -= 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597 }
598
599 while (size > 3) {
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900600 u32 val;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700601 pci_user_read_config_dword(dev, off, &val);
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900602 data[off - init_off] = val & 0xff;
603 data[off - init_off + 1] = (val >> 8) & 0xff;
604 data[off - init_off + 2] = (val >> 16) & 0xff;
605 data[off - init_off + 3] = (val >> 24) & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 off += 4;
607 size -= 4;
608 }
609
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900610 if (size >= 2) {
611 u16 val;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700612 pci_user_read_config_word(dev, off, &val);
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900613 data[off - init_off] = val & 0xff;
614 data[off - init_off + 1] = (val >> 8) & 0xff;
615 off += 2;
616 size -= 2;
617 }
618
619 if (size > 0) {
620 u8 val;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700621 pci_user_read_config_byte(dev, off, &val);
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900622 data[off - init_off] = val;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 off++;
624 --size;
625 }
626
Huang Ying3d8387e2012-08-15 09:43:03 +0800627 pci_config_pm_runtime_put(dev);
628
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 return count;
630}
631
632static ssize_t
Chris Wright2c3c8be2010-05-12 18:28:57 -0700633pci_write_config(struct file* filp, struct kobject *kobj,
634 struct bin_attribute *bin_attr,
Zhang Rui91a69022007-06-09 13:57:22 +0800635 char *buf, loff_t off, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636{
637 struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
638 unsigned int size = count;
639 loff_t init_off = off;
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900640 u8 *data = (u8*) buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641
642 if (off > dev->cfg_size)
643 return 0;
644 if (off + count > dev->cfg_size) {
645 size = dev->cfg_size - off;
646 count = size;
647 }
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900648
Huang Ying3d8387e2012-08-15 09:43:03 +0800649 pci_config_pm_runtime_get(dev);
650
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900651 if ((off & 1) && size) {
Brian Kinge04b0ea2005-09-27 01:21:55 -0700652 pci_user_write_config_byte(dev, off, data[off - init_off]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653 off++;
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900654 size--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 }
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900656
657 if ((off & 3) && size > 2) {
658 u16 val = data[off - init_off];
659 val |= (u16) data[off - init_off + 1] << 8;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700660 pci_user_write_config_word(dev, off, val);
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900661 off += 2;
662 size -= 2;
663 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664
665 while (size > 3) {
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900666 u32 val = data[off - init_off];
667 val |= (u32) data[off - init_off + 1] << 8;
668 val |= (u32) data[off - init_off + 2] << 16;
669 val |= (u32) data[off - init_off + 3] << 24;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700670 pci_user_write_config_dword(dev, off, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 off += 4;
672 size -= 4;
673 }
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900674
675 if (size >= 2) {
676 u16 val = data[off - init_off];
677 val |= (u16) data[off - init_off + 1] << 8;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700678 pci_user_write_config_word(dev, off, val);
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900679 off += 2;
680 size -= 2;
681 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900683 if (size) {
Brian Kinge04b0ea2005-09-27 01:21:55 -0700684 pci_user_write_config_byte(dev, off, data[off - init_off]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 off++;
686 --size;
687 }
688
Huang Ying3d8387e2012-08-15 09:43:03 +0800689 pci_config_pm_runtime_put(dev);
690
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 return count;
692}
693
Ben Hutchings94e61082008-03-05 16:52:39 +0000694static ssize_t
Chris Wright2c3c8be2010-05-12 18:28:57 -0700695read_vpd_attr(struct file *filp, struct kobject *kobj,
696 struct bin_attribute *bin_attr,
Ben Hutchings94e61082008-03-05 16:52:39 +0000697 char *buf, loff_t off, size_t count)
698{
699 struct pci_dev *dev =
700 to_pci_dev(container_of(kobj, struct device, kobj));
Ben Hutchings94e61082008-03-05 16:52:39 +0000701
702 if (off > bin_attr->size)
703 count = 0;
704 else if (count > bin_attr->size - off)
705 count = bin_attr->size - off;
Ben Hutchings94e61082008-03-05 16:52:39 +0000706
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800707 return pci_read_vpd(dev, off, count, buf);
708}
Ben Hutchings94e61082008-03-05 16:52:39 +0000709
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800710static ssize_t
Chris Wright2c3c8be2010-05-12 18:28:57 -0700711write_vpd_attr(struct file *filp, struct kobject *kobj,
712 struct bin_attribute *bin_attr,
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800713 char *buf, loff_t off, size_t count)
714{
715 struct pci_dev *dev =
716 to_pci_dev(container_of(kobj, struct device, kobj));
717
718 if (off > bin_attr->size)
719 count = 0;
720 else if (count > bin_attr->size - off)
721 count = bin_attr->size - off;
722
723 return pci_write_vpd(dev, off, count, buf);
Ben Hutchings94e61082008-03-05 16:52:39 +0000724}
725
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726#ifdef HAVE_PCI_LEGACY
727/**
728 * pci_read_legacy_io - read byte(s) from legacy I/O port space
Chris Wright2c3c8be2010-05-12 18:28:57 -0700729 * @filp: open sysfs file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730 * @kobj: kobject corresponding to file to read from
Randy Dunlapcffb2fa2009-04-10 15:17:50 -0700731 * @bin_attr: struct bin_attribute for this file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 * @buf: buffer to store results
733 * @off: offset into legacy I/O port space
734 * @count: number of bytes to read
735 *
736 * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific
737 * callback routine (pci_legacy_read).
738 */
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000739static ssize_t
Chris Wright2c3c8be2010-05-12 18:28:57 -0700740pci_read_legacy_io(struct file *filp, struct kobject *kobj,
741 struct bin_attribute *bin_attr,
Zhang Rui91a69022007-06-09 13:57:22 +0800742 char *buf, loff_t off, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743{
744 struct pci_bus *bus = to_pci_bus(container_of(kobj,
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -0400745 struct device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 kobj));
747
748 /* Only support 1, 2 or 4 byte accesses */
749 if (count != 1 && count != 2 && count != 4)
750 return -EINVAL;
751
752 return pci_legacy_read(bus, off, (u32 *)buf, count);
753}
754
755/**
756 * pci_write_legacy_io - write byte(s) to legacy I/O port space
Chris Wright2c3c8be2010-05-12 18:28:57 -0700757 * @filp: open sysfs file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 * @kobj: kobject corresponding to file to read from
Randy Dunlapcffb2fa2009-04-10 15:17:50 -0700759 * @bin_attr: struct bin_attribute for this file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 * @buf: buffer containing value to be written
761 * @off: offset into legacy I/O port space
762 * @count: number of bytes to write
763 *
764 * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific
765 * callback routine (pci_legacy_write).
766 */
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000767static ssize_t
Chris Wright2c3c8be2010-05-12 18:28:57 -0700768pci_write_legacy_io(struct file *filp, struct kobject *kobj,
769 struct bin_attribute *bin_attr,
Zhang Rui91a69022007-06-09 13:57:22 +0800770 char *buf, loff_t off, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771{
772 struct pci_bus *bus = to_pci_bus(container_of(kobj,
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -0400773 struct device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 kobj));
775 /* Only support 1, 2 or 4 byte accesses */
776 if (count != 1 && count != 2 && count != 4)
777 return -EINVAL;
778
779 return pci_legacy_write(bus, off, *(u32 *)buf, count);
780}
781
782/**
783 * pci_mmap_legacy_mem - map legacy PCI memory into user memory space
Chris Wright2c3c8be2010-05-12 18:28:57 -0700784 * @filp: open sysfs file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785 * @kobj: kobject corresponding to device to be mapped
786 * @attr: struct bin_attribute for this file
787 * @vma: struct vm_area_struct passed to mmap
788 *
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000789 * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790 * legacy memory space (first meg of bus space) into application virtual
791 * memory space.
792 */
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000793static int
Chris Wright2c3c8be2010-05-12 18:28:57 -0700794pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj,
795 struct bin_attribute *attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 struct vm_area_struct *vma)
797{
798 struct pci_bus *bus = to_pci_bus(container_of(kobj,
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -0400799 struct device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 kobj));
801
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000802 return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem);
803}
804
805/**
806 * pci_mmap_legacy_io - map legacy PCI IO into user memory space
Chris Wright2c3c8be2010-05-12 18:28:57 -0700807 * @filp: open sysfs file
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000808 * @kobj: kobject corresponding to device to be mapped
809 * @attr: struct bin_attribute for this file
810 * @vma: struct vm_area_struct passed to mmap
811 *
812 * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap
813 * legacy IO space (first meg of bus space) into application virtual
814 * memory space. Returns -ENOSYS if the operation isn't supported
815 */
816static int
Chris Wright2c3c8be2010-05-12 18:28:57 -0700817pci_mmap_legacy_io(struct file *filp, struct kobject *kobj,
818 struct bin_attribute *attr,
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000819 struct vm_area_struct *vma)
820{
821 struct pci_bus *bus = to_pci_bus(container_of(kobj,
822 struct device,
823 kobj));
824
825 return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io);
826}
827
828/**
Ivan Kokshaysky10a0ef32009-02-17 13:46:53 +0300829 * pci_adjust_legacy_attr - adjustment of legacy file attributes
830 * @b: bus to create files under
831 * @mmap_type: I/O port or memory
832 *
833 * Stub implementation. Can be overridden by arch if necessary.
834 */
835void __weak
836pci_adjust_legacy_attr(struct pci_bus *b, enum pci_mmap_state mmap_type)
837{
838 return;
839}
840
841/**
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000842 * pci_create_legacy_files - create legacy I/O port and memory files
843 * @b: bus to create files under
844 *
845 * Some platforms allow access to legacy I/O port and ISA memory space on
846 * a per-bus basis. This routine creates the files and ties them into
847 * their associated read, write and mmap files from pci-sysfs.c
848 *
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300849 * On error unwind, but don't propagate the error to the caller
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000850 * as it is ok to set up the PCI bus without these files.
851 */
852void pci_create_legacy_files(struct pci_bus *b)
853{
854 int error;
855
856 b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2,
857 GFP_ATOMIC);
858 if (!b->legacy_io)
859 goto kzalloc_err;
860
Stephen Rothwell62e877b82010-03-01 20:38:36 +1100861 sysfs_bin_attr_init(b->legacy_io);
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000862 b->legacy_io->attr.name = "legacy_io";
863 b->legacy_io->size = 0xffff;
864 b->legacy_io->attr.mode = S_IRUSR | S_IWUSR;
865 b->legacy_io->read = pci_read_legacy_io;
866 b->legacy_io->write = pci_write_legacy_io;
867 b->legacy_io->mmap = pci_mmap_legacy_io;
Ivan Kokshaysky10a0ef32009-02-17 13:46:53 +0300868 pci_adjust_legacy_attr(b, pci_mmap_io);
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000869 error = device_create_bin_file(&b->dev, b->legacy_io);
870 if (error)
871 goto legacy_io_err;
872
873 /* Allocated above after the legacy_io struct */
874 b->legacy_mem = b->legacy_io + 1;
Mel Gorman6757eca32010-03-10 22:48:34 +0000875 sysfs_bin_attr_init(b->legacy_mem);
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000876 b->legacy_mem->attr.name = "legacy_mem";
877 b->legacy_mem->size = 1024*1024;
878 b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR;
879 b->legacy_mem->mmap = pci_mmap_legacy_mem;
Ivan Kokshaysky10a0ef32009-02-17 13:46:53 +0300880 pci_adjust_legacy_attr(b, pci_mmap_mem);
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000881 error = device_create_bin_file(&b->dev, b->legacy_mem);
882 if (error)
883 goto legacy_mem_err;
884
885 return;
886
887legacy_mem_err:
888 device_remove_bin_file(&b->dev, b->legacy_io);
889legacy_io_err:
890 kfree(b->legacy_io);
891 b->legacy_io = NULL;
892kzalloc_err:
893 printk(KERN_WARNING "pci: warning: could not create legacy I/O port "
894 "and ISA memory resources to sysfs\n");
895 return;
896}
897
898void pci_remove_legacy_files(struct pci_bus *b)
899{
900 if (b->legacy_io) {
901 device_remove_bin_file(&b->dev, b->legacy_io);
902 device_remove_bin_file(&b->dev, b->legacy_mem);
903 kfree(b->legacy_io); /* both are allocated here */
904 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905}
906#endif /* HAVE_PCI_LEGACY */
907
908#ifdef HAVE_PCI_MMAP
Linus Torvaldsb5ff7df2008-10-02 18:52:51 -0700909
Martin Wilck3b519e42010-11-10 11:03:21 +0100910int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma,
911 enum pci_mmap_api mmap_api)
Linus Torvaldsb5ff7df2008-10-02 18:52:51 -0700912{
Martin Wilck3b519e42010-11-10 11:03:21 +0100913 unsigned long nr, start, size, pci_start;
Linus Torvaldsb5ff7df2008-10-02 18:52:51 -0700914
Martin Wilck3b519e42010-11-10 11:03:21 +0100915 if (pci_resource_len(pdev, resno) == 0)
916 return 0;
Linus Torvaldsb5ff7df2008-10-02 18:52:51 -0700917 nr = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
918 start = vma->vm_pgoff;
Ed Swierk88e7df02008-11-03 14:41:16 -0800919 size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1;
Darrick J. Wong8c05cd02010-11-16 09:13:41 -0800920 pci_start = (mmap_api == PCI_MMAP_PROCFS) ?
Martin Wilck3b519e42010-11-10 11:03:21 +0100921 pci_resource_start(pdev, resno) >> PAGE_SHIFT : 0;
922 if (start >= pci_start && start < pci_start + size &&
923 start + nr <= pci_start + size)
Linus Torvaldsb5ff7df2008-10-02 18:52:51 -0700924 return 1;
Linus Torvaldsb5ff7df2008-10-02 18:52:51 -0700925 return 0;
926}
927
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928/**
929 * pci_mmap_resource - map a PCI resource into user memory space
930 * @kobj: kobject for mapping
931 * @attr: struct bin_attribute for the file being mapped
932 * @vma: struct vm_area_struct passed into the mmap
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -0700933 * @write_combine: 1 for write_combine mapping
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934 *
935 * Use the regular PCI mapping routines to map a PCI resource into userspace.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936 */
937static int
938pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -0700939 struct vm_area_struct *vma, int write_combine)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940{
941 struct pci_dev *pdev = to_pci_dev(container_of(kobj,
942 struct device, kobj));
Kulikov Vasiliya3f58352010-06-29 14:15:28 +0400943 struct resource *res = attr->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 enum pci_mmap_state mmap_type;
Greg Kroah-Hartmane31dd6e2006-06-12 17:06:02 -0700945 resource_size_t start, end;
Michael Ellerman2311b1f2005-05-13 17:44:10 +1000946 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947
Michael Ellerman2311b1f2005-05-13 17:44:10 +1000948 for (i = 0; i < PCI_ROM_RESOURCE; i++)
949 if (res == &pdev->resource[i])
950 break;
951 if (i >= PCI_ROM_RESOURCE)
952 return -ENODEV;
953
Martin Wilck3b519e42010-11-10 11:03:21 +0100954 if (!pci_mmap_fits(pdev, i, vma, PCI_MMAP_SYSFS)) {
955 WARN(1, "process \"%s\" tried to map 0x%08lx bytes "
956 "at page 0x%08lx on %s BAR %d (start 0x%16Lx, size 0x%16Lx)\n",
957 current->comm, vma->vm_end-vma->vm_start, vma->vm_pgoff,
958 pci_name(pdev), i,
Randy Dunlape25cd062010-11-13 08:44:33 -0800959 (u64)pci_resource_start(pdev, i),
960 (u64)pci_resource_len(pdev, i));
Linus Torvaldsb5ff7df2008-10-02 18:52:51 -0700961 return -EINVAL;
Martin Wilck3b519e42010-11-10 11:03:21 +0100962 }
Linus Torvaldsb5ff7df2008-10-02 18:52:51 -0700963
Michael Ellerman2311b1f2005-05-13 17:44:10 +1000964 /* pci_mmap_page_range() expects the same kind of entry as coming
965 * from /proc/bus/pci/ which is a "user visible" value. If this is
966 * different from the resource itself, arch will do necessary fixup.
967 */
968 pci_resource_to_user(pdev, i, res, &start, &end);
969 vma->vm_pgoff += start >> PAGE_SHIFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970 mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;
971
Arjan van de Vene8de1482008-10-22 19:55:31 -0700972 if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(start))
973 return -EINVAL;
974
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -0700975 return pci_mmap_page_range(pdev, vma, mmap_type, write_combine);
976}
977
978static int
Chris Wright2c3c8be2010-05-12 18:28:57 -0700979pci_mmap_resource_uc(struct file *filp, struct kobject *kobj,
980 struct bin_attribute *attr,
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -0700981 struct vm_area_struct *vma)
982{
983 return pci_mmap_resource(kobj, attr, vma, 0);
984}
985
986static int
Chris Wright2c3c8be2010-05-12 18:28:57 -0700987pci_mmap_resource_wc(struct file *filp, struct kobject *kobj,
988 struct bin_attribute *attr,
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -0700989 struct vm_area_struct *vma)
990{
991 return pci_mmap_resource(kobj, attr, vma, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992}
993
Alex Williamson86333282010-07-19 09:45:34 -0600994static ssize_t
995pci_resource_io(struct file *filp, struct kobject *kobj,
996 struct bin_attribute *attr, char *buf,
997 loff_t off, size_t count, bool write)
998{
999 struct pci_dev *pdev = to_pci_dev(container_of(kobj,
1000 struct device, kobj));
1001 struct resource *res = attr->private;
1002 unsigned long port = off;
1003 int i;
1004
1005 for (i = 0; i < PCI_ROM_RESOURCE; i++)
1006 if (res == &pdev->resource[i])
1007 break;
1008 if (i >= PCI_ROM_RESOURCE)
1009 return -ENODEV;
1010
1011 port += pci_resource_start(pdev, i);
1012
1013 if (port > pci_resource_end(pdev, i))
1014 return 0;
1015
1016 if (port + count - 1 > pci_resource_end(pdev, i))
1017 return -EINVAL;
1018
1019 switch (count) {
1020 case 1:
1021 if (write)
1022 outb(*(u8 *)buf, port);
1023 else
1024 *(u8 *)buf = inb(port);
1025 return 1;
1026 case 2:
1027 if (write)
1028 outw(*(u16 *)buf, port);
1029 else
1030 *(u16 *)buf = inw(port);
1031 return 2;
1032 case 4:
1033 if (write)
1034 outl(*(u32 *)buf, port);
1035 else
1036 *(u32 *)buf = inl(port);
1037 return 4;
1038 }
1039 return -EINVAL;
1040}
1041
1042static ssize_t
1043pci_read_resource_io(struct file *filp, struct kobject *kobj,
1044 struct bin_attribute *attr, char *buf,
1045 loff_t off, size_t count)
1046{
1047 return pci_resource_io(filp, kobj, attr, buf, off, count, false);
1048}
1049
1050static ssize_t
1051pci_write_resource_io(struct file *filp, struct kobject *kobj,
1052 struct bin_attribute *attr, char *buf,
1053 loff_t off, size_t count)
1054{
1055 return pci_resource_io(filp, kobj, attr, buf, off, count, true);
1056}
1057
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058/**
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001059 * pci_remove_resource_files - cleanup resource files
Randy Dunlapcffb2fa2009-04-10 15:17:50 -07001060 * @pdev: dev to cleanup
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001061 *
Randy Dunlapcffb2fa2009-04-10 15:17:50 -07001062 * If we created resource files for @pdev, remove them from sysfs and
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001063 * free their resources.
1064 */
1065static void
1066pci_remove_resource_files(struct pci_dev *pdev)
1067{
1068 int i;
1069
1070 for (i = 0; i < PCI_ROM_RESOURCE; i++) {
1071 struct bin_attribute *res_attr;
1072
1073 res_attr = pdev->res_attr[i];
1074 if (res_attr) {
1075 sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
1076 kfree(res_attr);
1077 }
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -07001078
1079 res_attr = pdev->res_attr_wc[i];
1080 if (res_attr) {
1081 sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
1082 kfree(res_attr);
1083 }
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001084 }
1085}
1086
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -07001087static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine)
1088{
1089 /* allocate attribute structure, piggyback attribute name */
1090 int name_len = write_combine ? 13 : 10;
1091 struct bin_attribute *res_attr;
1092 int retval;
1093
1094 res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC);
1095 if (res_attr) {
1096 char *res_attr_name = (char *)(res_attr + 1);
1097
Eric W. Biedermana07e4152010-02-11 15:23:05 -08001098 sysfs_bin_attr_init(res_attr);
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -07001099 if (write_combine) {
1100 pdev->res_attr_wc[num] = res_attr;
1101 sprintf(res_attr_name, "resource%d_wc", num);
1102 res_attr->mmap = pci_mmap_resource_wc;
1103 } else {
1104 pdev->res_attr[num] = res_attr;
1105 sprintf(res_attr_name, "resource%d", num);
1106 res_attr->mmap = pci_mmap_resource_uc;
1107 }
Alex Williamson86333282010-07-19 09:45:34 -06001108 if (pci_resource_flags(pdev, num) & IORESOURCE_IO) {
1109 res_attr->read = pci_read_resource_io;
1110 res_attr->write = pci_write_resource_io;
1111 }
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -07001112 res_attr->attr.name = res_attr_name;
1113 res_attr->attr.mode = S_IRUSR | S_IWUSR;
1114 res_attr->size = pci_resource_len(pdev, num);
1115 res_attr->private = &pdev->resource[num];
1116 retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr);
1117 } else
1118 retval = -ENOMEM;
1119
1120 return retval;
1121}
1122
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001123/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124 * pci_create_resource_files - create resource files in sysfs for @dev
Randy Dunlapcffb2fa2009-04-10 15:17:50 -07001125 * @pdev: dev in question
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126 *
Randy Dunlapcffb2fa2009-04-10 15:17:50 -07001127 * Walk the resources in @pdev creating files for each resource available.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 */
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001129static int pci_create_resource_files(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130{
1131 int i;
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001132 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133
1134 /* Expose the PCI resources from this device as files */
1135 for (i = 0; i < PCI_ROM_RESOURCE; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136
1137 /* skip empty resources */
1138 if (!pci_resource_len(pdev, i))
1139 continue;
1140
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -07001141 retval = pci_create_attr(pdev, i, 0);
1142 /* for prefetchable resources, create a WC mappable file */
1143 if (!retval && pdev->resource[i].flags & IORESOURCE_PREFETCH)
1144 retval = pci_create_attr(pdev, i, 1);
Dmitry Torokhovd48593b2005-04-29 00:58:46 -05001145
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -07001146 if (retval) {
1147 pci_remove_resource_files(pdev);
1148 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149 }
1150 }
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001151 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152}
1153#else /* !HAVE_PCI_MMAP */
Ivan Kokshaysky10a0ef32009-02-17 13:46:53 +03001154int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; }
1155void __weak pci_remove_resource_files(struct pci_dev *dev) { return; }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156#endif /* HAVE_PCI_MMAP */
1157
1158/**
1159 * pci_write_rom - used to enable access to the PCI ROM display
Chris Wright2c3c8be2010-05-12 18:28:57 -07001160 * @filp: sysfs file
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161 * @kobj: kernel object handle
Randy Dunlapcffb2fa2009-04-10 15:17:50 -07001162 * @bin_attr: struct bin_attribute for this file
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163 * @buf: user input
1164 * @off: file offset
1165 * @count: number of byte in input
1166 *
1167 * writing anything except 0 enables it
1168 */
1169static ssize_t
Chris Wright2c3c8be2010-05-12 18:28:57 -07001170pci_write_rom(struct file *filp, struct kobject *kobj,
1171 struct bin_attribute *bin_attr,
Zhang Rui91a69022007-06-09 13:57:22 +08001172 char *buf, loff_t off, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173{
1174 struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
1175
1176 if ((off == 0) && (*buf == '0') && (count == 2))
1177 pdev->rom_attr_enabled = 0;
1178 else
1179 pdev->rom_attr_enabled = 1;
1180
1181 return count;
1182}
1183
1184/**
1185 * pci_read_rom - read a PCI ROM
Chris Wright2c3c8be2010-05-12 18:28:57 -07001186 * @filp: sysfs file
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187 * @kobj: kernel object handle
Randy Dunlapcffb2fa2009-04-10 15:17:50 -07001188 * @bin_attr: struct bin_attribute for this file
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189 * @buf: where to put the data we read from the ROM
1190 * @off: file offset
1191 * @count: number of bytes to read
1192 *
1193 * Put @count bytes starting at @off into @buf from the ROM in the PCI
1194 * device corresponding to @kobj.
1195 */
1196static ssize_t
Chris Wright2c3c8be2010-05-12 18:28:57 -07001197pci_read_rom(struct file *filp, struct kobject *kobj,
1198 struct bin_attribute *bin_attr,
Zhang Rui91a69022007-06-09 13:57:22 +08001199 char *buf, loff_t off, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200{
1201 struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
1202 void __iomem *rom;
1203 size_t size;
1204
1205 if (!pdev->rom_attr_enabled)
1206 return -EINVAL;
1207
1208 rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */
Timothy S. Nelson97c44832009-01-30 06:12:47 +11001209 if (!rom || !size)
1210 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211
1212 if (off >= size)
1213 count = 0;
1214 else {
1215 if (off + count > size)
1216 count = size - off;
1217
1218 memcpy_fromio(buf, rom + off, count);
1219 }
1220 pci_unmap_rom(pdev, rom);
1221
1222 return count;
1223}
1224
1225static struct bin_attribute pci_config_attr = {
1226 .attr = {
1227 .name = "config",
1228 .mode = S_IRUGO | S_IWUSR,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229 },
Zhao, Yu557848c2008-10-13 19:18:07 +08001230 .size = PCI_CFG_SPACE_SIZE,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231 .read = pci_read_config,
1232 .write = pci_write_config,
1233};
1234
1235static struct bin_attribute pcie_config_attr = {
1236 .attr = {
1237 .name = "config",
1238 .mode = S_IRUGO | S_IWUSR,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 },
Zhao, Yu557848c2008-10-13 19:18:07 +08001240 .size = PCI_CFG_SPACE_EXP_SIZE,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241 .read = pci_read_config,
1242 .write = pci_write_config,
1243};
1244
Bjorn Helgaasd6d88c82012-06-19 06:54:49 -06001245int __weak pcibios_add_platform_entries(struct pci_dev *dev)
Michael Ellerman575e3342007-05-08 12:03:07 +10001246{
Michael Ellermana2cd52c2007-05-08 12:03:08 +10001247 return 0;
Michael Ellerman575e3342007-05-08 12:03:07 +10001248}
1249
Michael S. Tsirkin711d5772009-07-27 23:37:48 +03001250static ssize_t reset_store(struct device *dev,
1251 struct device_attribute *attr, const char *buf,
1252 size_t count)
1253{
1254 struct pci_dev *pdev = to_pci_dev(dev);
1255 unsigned long val;
1256 ssize_t result = strict_strtoul(buf, 0, &val);
1257
1258 if (result < 0)
1259 return result;
1260
1261 if (val != 1)
1262 return -EINVAL;
Michal Schmidt447c5dd2010-05-11 11:44:54 +02001263
1264 result = pci_reset_function(pdev);
1265 if (result < 0)
1266 return result;
1267
1268 return count;
Michael S. Tsirkin711d5772009-07-27 23:37:48 +03001269}
1270
1271static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store);
1272
Zhao, Yu280c73d2008-10-13 20:01:00 +08001273static int pci_create_capabilities_sysfs(struct pci_dev *dev)
1274{
1275 int retval;
1276 struct bin_attribute *attr;
1277
1278 /* If the device has VPD, try to expose it in sysfs. */
1279 if (dev->vpd) {
1280 attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
1281 if (!attr)
1282 return -ENOMEM;
1283
Eric W. Biedermana07e4152010-02-11 15:23:05 -08001284 sysfs_bin_attr_init(attr);
Zhao, Yu280c73d2008-10-13 20:01:00 +08001285 attr->size = dev->vpd->len;
1286 attr->attr.name = "vpd";
1287 attr->attr.mode = S_IRUSR | S_IWUSR;
Stephen Hemminger287d19c2008-12-18 09:17:16 -08001288 attr->read = read_vpd_attr;
1289 attr->write = write_vpd_attr;
Zhao, Yu280c73d2008-10-13 20:01:00 +08001290 retval = sysfs_create_bin_file(&dev->dev.kobj, attr);
1291 if (retval) {
Ben Hutchings0f12a4e2011-01-13 19:47:56 +00001292 kfree(attr);
Zhao, Yu280c73d2008-10-13 20:01:00 +08001293 return retval;
1294 }
1295 dev->vpd->attr = attr;
1296 }
1297
1298 /* Active State Power Management */
1299 pcie_aspm_create_sysfs_dev_files(dev);
1300
Michael S. Tsirkin711d5772009-07-27 23:37:48 +03001301 if (!pci_probe_reset_function(dev)) {
1302 retval = device_create_file(&dev->dev, &reset_attr);
1303 if (retval)
1304 goto error;
1305 dev->reset_fn = 1;
1306 }
Zhao, Yu280c73d2008-10-13 20:01:00 +08001307 return 0;
Michael S. Tsirkin711d5772009-07-27 23:37:48 +03001308
1309error:
1310 pcie_aspm_remove_sysfs_dev_files(dev);
1311 if (dev->vpd && dev->vpd->attr) {
1312 sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
1313 kfree(dev->vpd->attr);
1314 }
1315
1316 return retval;
Zhao, Yu280c73d2008-10-13 20:01:00 +08001317}
1318
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001319int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320{
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001321 int retval;
Zhao, Yu280c73d2008-10-13 20:01:00 +08001322 int rom_size = 0;
1323 struct bin_attribute *attr;
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001324
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325 if (!sysfs_initialized)
1326 return -EACCES;
1327
Zhao, Yu557848c2008-10-13 19:18:07 +08001328 if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001329 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330 else
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001331 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr);
1332 if (retval)
1333 goto err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001335 retval = pci_create_resource_files(pdev);
1336 if (retval)
Zhao, Yu280c73d2008-10-13 20:01:00 +08001337 goto err_config_file;
1338
1339 if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
1340 rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
1341 else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)
1342 rom_size = 0x20000;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343
1344 /* If the device has a ROM, try to expose it in sysfs. */
Zhao, Yu280c73d2008-10-13 20:01:00 +08001345 if (rom_size) {
Ben Hutchings94e61082008-03-05 16:52:39 +00001346 attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
Zhao, Yu280c73d2008-10-13 20:01:00 +08001347 if (!attr) {
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001348 retval = -ENOMEM;
Michael Ellerman9890b122007-04-18 13:34:12 +10001349 goto err_resource_files;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350 }
Eric W. Biedermana07e4152010-02-11 15:23:05 -08001351 sysfs_bin_attr_init(attr);
Zhao, Yu280c73d2008-10-13 20:01:00 +08001352 attr->size = rom_size;
1353 attr->attr.name = "rom";
Alex Williamsonff295302011-01-05 10:26:41 -07001354 attr->attr.mode = S_IRUSR | S_IWUSR;
Zhao, Yu280c73d2008-10-13 20:01:00 +08001355 attr->read = pci_read_rom;
1356 attr->write = pci_write_rom;
1357 retval = sysfs_create_bin_file(&pdev->dev.kobj, attr);
1358 if (retval) {
1359 kfree(attr);
1360 goto err_resource_files;
1361 }
1362 pdev->rom_attr = attr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363 }
Zhao, Yu280c73d2008-10-13 20:01:00 +08001364
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365 /* add platform-specific attributes */
Zhao, Yu280c73d2008-10-13 20:01:00 +08001366 retval = pcibios_add_platform_entries(pdev);
1367 if (retval)
Yinghai Lu625e1d52012-11-05 15:20:35 -05001368 goto err_rom_file;
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001369
Zhao, Yu280c73d2008-10-13 20:01:00 +08001370 /* add sysfs entries for various capabilities */
1371 retval = pci_create_capabilities_sysfs(pdev);
1372 if (retval)
Yinghai Lu625e1d52012-11-05 15:20:35 -05001373 goto err_rom_file;
Shaohua Li7d715a62008-02-25 09:46:41 +08001374
Narendra K911e1c92010-07-26 05:56:50 -05001375 pci_create_firmware_label_files(pdev);
1376
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377 return 0;
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001378
Michael Ellermana2cd52c2007-05-08 12:03:08 +10001379err_rom_file:
Zhao, Yu280c73d2008-10-13 20:01:00 +08001380 if (rom_size) {
Ben Hutchings94e61082008-03-05 16:52:39 +00001381 sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
Zhao, Yu280c73d2008-10-13 20:01:00 +08001382 kfree(pdev->rom_attr);
1383 pdev->rom_attr = NULL;
1384 }
Michael Ellerman9890b122007-04-18 13:34:12 +10001385err_resource_files:
1386 pci_remove_resource_files(pdev);
Ben Hutchings94e61082008-03-05 16:52:39 +00001387err_config_file:
Zhao, Yu557848c2008-10-13 19:18:07 +08001388 if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001389 sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
1390 else
1391 sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
1392err:
1393 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394}
1395
Zhao, Yu280c73d2008-10-13 20:01:00 +08001396static void pci_remove_capabilities_sysfs(struct pci_dev *dev)
1397{
1398 if (dev->vpd && dev->vpd->attr) {
1399 sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
1400 kfree(dev->vpd->attr);
1401 }
1402
1403 pcie_aspm_remove_sysfs_dev_files(dev);
Michael S. Tsirkin711d5772009-07-27 23:37:48 +03001404 if (dev->reset_fn) {
1405 device_remove_file(&dev->dev, &reset_attr);
1406 dev->reset_fn = 0;
1407 }
Zhao, Yu280c73d2008-10-13 20:01:00 +08001408}
1409
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410/**
1411 * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files
1412 * @pdev: device whose entries we should free
1413 *
1414 * Cleanup when @pdev is removed from sysfs.
1415 */
1416void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
1417{
Zhao, Yu280c73d2008-10-13 20:01:00 +08001418 int rom_size = 0;
1419
David Millerd67afe52006-11-10 12:27:48 -08001420 if (!sysfs_initialized)
1421 return;
1422
Zhao, Yu280c73d2008-10-13 20:01:00 +08001423 pci_remove_capabilities_sysfs(pdev);
Shaohua Li7d715a62008-02-25 09:46:41 +08001424
Zhao, Yu557848c2008-10-13 19:18:07 +08001425 if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001426 sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
1427 else
1428 sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
1429
1430 pci_remove_resource_files(pdev);
1431
Zhao, Yu280c73d2008-10-13 20:01:00 +08001432 if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
1433 rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
1434 else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)
1435 rom_size = 0x20000;
1436
1437 if (rom_size && pdev->rom_attr) {
1438 sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
1439 kfree(pdev->rom_attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001440 }
Narendra K911e1c92010-07-26 05:56:50 -05001441
1442 pci_remove_firmware_label_files(pdev);
1443
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444}
1445
1446static int __init pci_sysfs_init(void)
1447{
1448 struct pci_dev *pdev = NULL;
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001449 int retval;
1450
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451 sysfs_initialized = 1;
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001452 for_each_pci_dev(pdev) {
1453 retval = pci_create_sysfs_dev_files(pdev);
Julia Lawall151fc5d2007-11-20 08:41:16 +01001454 if (retval) {
1455 pci_dev_put(pdev);
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001456 return retval;
Julia Lawall151fc5d2007-11-20 08:41:16 +01001457 }
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001458 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001459
1460 return 0;
1461}
1462
Jesse Barnes40ee9e92007-03-24 11:03:32 -07001463late_initcall(pci_sysfs_init);
Yinghai Lu4e15c462012-11-05 15:20:34 -05001464
1465static struct attribute *pci_dev_dev_attrs[] = {
Yinghai Lu625e1d52012-11-05 15:20:35 -05001466 &vga_attr.attr,
Yinghai Lu4e15c462012-11-05 15:20:34 -05001467 NULL,
1468};
1469
1470static umode_t pci_dev_attrs_are_visible(struct kobject *kobj,
1471 struct attribute *a, int n)
1472{
Yinghai Lu625e1d52012-11-05 15:20:35 -05001473 struct device *dev = container_of(kobj, struct device, kobj);
1474 struct pci_dev *pdev = to_pci_dev(dev);
1475
1476 if (a == &vga_attr.attr)
1477 if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
1478 return 0;
1479
Yinghai Lu4e15c462012-11-05 15:20:34 -05001480 return a->mode;
1481}
1482
Donald Dutile17893822012-11-05 15:20:36 -05001483#ifdef CONFIG_PCI_IOV
1484static struct attribute *sriov_dev_attrs[] = {
1485 &sriov_totalvfs_attr.attr,
1486 &sriov_numvfs_attr.attr,
1487 NULL,
1488};
1489
1490static umode_t sriov_attrs_are_visible(struct kobject *kobj,
1491 struct attribute *a, int n)
1492{
1493 struct device *dev = container_of(kobj, struct device, kobj);
1494
1495 if (!dev_is_pf(dev))
1496 return 0;
1497
1498 return a->mode;
1499}
1500
1501static struct attribute_group sriov_dev_attr_group = {
1502 .attrs = sriov_dev_attrs,
1503 .is_visible = sriov_attrs_are_visible,
1504};
1505#endif /* CONFIG_PCI_IOV */
1506
Yinghai Lu4e15c462012-11-05 15:20:34 -05001507static struct attribute_group pci_dev_attr_group = {
1508 .attrs = pci_dev_dev_attrs,
1509 .is_visible = pci_dev_attrs_are_visible,
1510};
1511
1512static const struct attribute_group *pci_dev_attr_groups[] = {
1513 &pci_dev_attr_group,
Donald Dutile17893822012-11-05 15:20:36 -05001514#ifdef CONFIG_PCI_IOV
1515 &sriov_dev_attr_group,
1516#endif
Yinghai Lu4e15c462012-11-05 15:20:34 -05001517 NULL,
1518};
1519
1520struct device_type pci_dev_type = {
1521 .groups = pci_dev_attr_groups,
1522};