blob: 86c63fe45d11bf22225afffd1317777edefcc8c7 [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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include "pci.h"
32
33static int sysfs_initialized; /* = 0 */
34
35/* show configuration fields */
36#define pci_config_attr(field, format_string) \
37static ssize_t \
Yani Ioannoue404e272005-05-17 06:42:58 -040038field##_show(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -070039{ \
40 struct pci_dev *pdev; \
41 \
42 pdev = to_pci_dev (dev); \
43 return sprintf (buf, format_string, pdev->field); \
44}
45
46pci_config_attr(vendor, "0x%04x\n");
47pci_config_attr(device, "0x%04x\n");
48pci_config_attr(subsystem_vendor, "0x%04x\n");
49pci_config_attr(subsystem_device, "0x%04x\n");
50pci_config_attr(class, "0x%06x\n");
51pci_config_attr(irq, "%u\n");
52
Doug Thompsonbdee9d92006-06-14 16:59:48 -070053static ssize_t broken_parity_status_show(struct device *dev,
54 struct device_attribute *attr,
55 char *buf)
56{
57 struct pci_dev *pdev = to_pci_dev(dev);
58 return sprintf (buf, "%u\n", pdev->broken_parity_status);
59}
60
61static ssize_t broken_parity_status_store(struct device *dev,
62 struct device_attribute *attr,
63 const char *buf, size_t count)
64{
65 struct pci_dev *pdev = to_pci_dev(dev);
Trent Piepho92425a42008-11-30 17:10:12 -080066 unsigned long val;
Doug Thompsonbdee9d92006-06-14 16:59:48 -070067
Trent Piepho92425a42008-11-30 17:10:12 -080068 if (strict_strtoul(buf, 0, &val) < 0)
69 return -EINVAL;
70
71 pdev->broken_parity_status = !!val;
72
73 return count;
Doug Thompsonbdee9d92006-06-14 16:59:48 -070074}
75
Alan Cox4327edf2005-09-10 00:25:49 -070076static ssize_t local_cpus_show(struct device *dev,
77 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -070078{
Mike Travis3be83052009-01-04 05:18:01 -080079 const struct cpumask *mask;
Alan Cox4327edf2005-09-10 00:25:49 -070080 int len;
81
Andreas Herrmanne0cd5162009-04-17 12:01:55 +020082#ifdef CONFIG_NUMA
David John6be954d2010-01-04 20:28:57 +053083 mask = (dev_to_node(dev) == -1) ? cpu_online_mask :
84 cpumask_of_node(dev_to_node(dev));
Andreas Herrmanne0cd5162009-04-17 12:01:55 +020085#else
Mike Travis3be83052009-01-04 05:18:01 -080086 mask = cpumask_of_pcibus(to_pci_dev(dev)->bus);
Andreas Herrmanne0cd5162009-04-17 12:01:55 +020087#endif
Mike Travis3be83052009-01-04 05:18:01 -080088 len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask);
Mike Travis39106dc2008-04-08 11:43:03 -070089 buf[len++] = '\n';
90 buf[len] = '\0';
91 return len;
92}
93
94
95static ssize_t local_cpulist_show(struct device *dev,
96 struct device_attribute *attr, char *buf)
97{
Mike Travis3be83052009-01-04 05:18:01 -080098 const struct cpumask *mask;
Mike Travis39106dc2008-04-08 11:43:03 -070099 int len;
100
Andreas Herrmanne0cd5162009-04-17 12:01:55 +0200101#ifdef CONFIG_NUMA
David John6be954d2010-01-04 20:28:57 +0530102 mask = (dev_to_node(dev) == -1) ? cpu_online_mask :
103 cpumask_of_node(dev_to_node(dev));
Andreas Herrmanne0cd5162009-04-17 12:01:55 +0200104#else
Mike Travis3be83052009-01-04 05:18:01 -0800105 mask = cpumask_of_pcibus(to_pci_dev(dev)->bus);
Andreas Herrmanne0cd5162009-04-17 12:01:55 +0200106#endif
Mike Travis3be83052009-01-04 05:18:01 -0800107 len = cpulist_scnprintf(buf, PAGE_SIZE-2, mask);
Mike Travis39106dc2008-04-08 11:43:03 -0700108 buf[len++] = '\n';
109 buf[len] = '\0';
110 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111}
112
Yinghai Ludc2c2c92011-05-12 17:11:40 -0700113/*
114 * PCI Bus Class Devices
115 */
116static ssize_t pci_bus_show_cpuaffinity(struct device *dev,
117 int type,
118 struct device_attribute *attr,
119 char *buf)
120{
121 int ret;
122 const struct cpumask *cpumask;
123
124 cpumask = cpumask_of_pcibus(to_pci_bus(dev));
125 ret = type ?
126 cpulist_scnprintf(buf, PAGE_SIZE-2, cpumask) :
127 cpumask_scnprintf(buf, PAGE_SIZE-2, cpumask);
128 buf[ret++] = '\n';
129 buf[ret] = '\0';
130 return ret;
131}
132
133static inline ssize_t pci_bus_show_cpumaskaffinity(struct device *dev,
134 struct device_attribute *attr,
135 char *buf)
136{
137 return pci_bus_show_cpuaffinity(dev, 0, attr, buf);
138}
139
140static inline ssize_t pci_bus_show_cpulistaffinity(struct device *dev,
141 struct device_attribute *attr,
142 char *buf)
143{
144 return pci_bus_show_cpuaffinity(dev, 1, attr, buf);
145}
146
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147/* show resources */
148static ssize_t
Yani Ioannoue404e272005-05-17 06:42:58 -0400149resource_show(struct device * dev, struct device_attribute *attr, char * buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150{
151 struct pci_dev * pci_dev = to_pci_dev(dev);
152 char * str = buf;
153 int i;
Yu Zhaofde09c62008-11-22 02:39:32 +0800154 int max;
Greg Kroah-Hartmane31dd6e2006-06-12 17:06:02 -0700155 resource_size_t start, end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
157 if (pci_dev->subordinate)
158 max = DEVICE_COUNT_RESOURCE;
Yu Zhaofde09c62008-11-22 02:39:32 +0800159 else
160 max = PCI_BRIDGE_RESOURCES;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
162 for (i = 0; i < max; i++) {
Michael Ellerman2311b1f2005-05-13 17:44:10 +1000163 struct resource *res = &pci_dev->resource[i];
164 pci_resource_to_user(pci_dev, i, res, &start, &end);
165 str += sprintf(str,"0x%016llx 0x%016llx 0x%016llx\n",
166 (unsigned long long)start,
167 (unsigned long long)end,
168 (unsigned long long)res->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 }
170 return (str - buf);
171}
172
Greg Kroah-Hartman87c8a442005-06-19 12:21:43 +0200173static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
Greg KH98885492005-05-05 11:57:25 -0700174{
175 struct pci_dev *pci_dev = to_pci_dev(dev);
176
177 return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n",
178 pci_dev->vendor, pci_dev->device,
179 pci_dev->subsystem_vendor, pci_dev->subsystem_device,
180 (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8),
181 (u8)(pci_dev->class));
182}
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -0800183
184static ssize_t is_enabled_store(struct device *dev,
185 struct device_attribute *attr, const char *buf,
186 size_t count)
Arjan van de Ven9f125d32006-04-29 10:59:08 +0200187{
188 struct pci_dev *pdev = to_pci_dev(dev);
Trent Piepho92425a42008-11-30 17:10:12 -0800189 unsigned long val;
190 ssize_t result = strict_strtoul(buf, 0, &val);
191
192 if (result < 0)
193 return result;
Arjan van de Ven9f125d32006-04-29 10:59:08 +0200194
195 /* this can crash the machine when done on the "wrong" device */
196 if (!capable(CAP_SYS_ADMIN))
Trent Piepho92425a42008-11-30 17:10:12 -0800197 return -EPERM;
Arjan van de Ven9f125d32006-04-29 10:59:08 +0200198
Trent Piepho92425a42008-11-30 17:10:12 -0800199 if (!val) {
Yuji Shimada296ccb02009-04-03 16:41:46 +0900200 if (pci_is_enabled(pdev))
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -0800201 pci_disable_device(pdev);
202 else
203 result = -EIO;
Trent Piepho92425a42008-11-30 17:10:12 -0800204 } else
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -0800205 result = pci_enable_device(pdev);
Arjan van de Ven9f125d32006-04-29 10:59:08 +0200206
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -0800207 return result < 0 ? result : count;
208}
Arjan van de Ven9f125d32006-04-29 10:59:08 +0200209
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -0800210static ssize_t is_enabled_show(struct device *dev,
211 struct device_attribute *attr, char *buf)
212{
213 struct pci_dev *pdev;
214
215 pdev = to_pci_dev (dev);
216 return sprintf (buf, "%u\n", atomic_read(&pdev->enable_cnt));
Arjan van de Ven9f125d32006-04-29 10:59:08 +0200217}
218
Brice Goglin81bb0e12007-01-28 10:53:40 +0100219#ifdef CONFIG_NUMA
220static ssize_t
221numa_node_show(struct device *dev, struct device_attribute *attr, char *buf)
222{
223 return sprintf (buf, "%d\n", dev->numa_node);
224}
225#endif
226
Brice Goglinfe970642006-08-31 01:55:15 -0400227static ssize_t
Yinghai Lubb965402009-11-24 18:21:21 -0800228dma_mask_bits_show(struct device *dev, struct device_attribute *attr, char *buf)
229{
230 struct pci_dev *pdev = to_pci_dev(dev);
231
232 return sprintf (buf, "%d\n", fls64(pdev->dma_mask));
233}
234
235static ssize_t
236consistent_dma_mask_bits_show(struct device *dev, struct device_attribute *attr,
237 char *buf)
238{
239 return sprintf (buf, "%d\n", fls64(dev->coherent_dma_mask));
240}
241
242static ssize_t
Brice Goglinfe970642006-08-31 01:55:15 -0400243msi_bus_show(struct device *dev, struct device_attribute *attr, char *buf)
244{
245 struct pci_dev *pdev = to_pci_dev(dev);
246
247 if (!pdev->subordinate)
248 return 0;
249
250 return sprintf (buf, "%u\n",
251 !(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI));
252}
253
254static ssize_t
255msi_bus_store(struct device *dev, struct device_attribute *attr,
256 const char *buf, size_t count)
257{
258 struct pci_dev *pdev = to_pci_dev(dev);
Trent Piepho92425a42008-11-30 17:10:12 -0800259 unsigned long val;
260
261 if (strict_strtoul(buf, 0, &val) < 0)
262 return -EINVAL;
Brice Goglinfe970642006-08-31 01:55:15 -0400263
264 /* bad things may happen if the no_msi flag is changed
265 * while some drivers are loaded */
266 if (!capable(CAP_SYS_ADMIN))
Trent Piepho92425a42008-11-30 17:10:12 -0800267 return -EPERM;
Brice Goglinfe970642006-08-31 01:55:15 -0400268
Trent Piepho92425a42008-11-30 17:10:12 -0800269 /* Maybe pci devices without subordinate busses shouldn't even have this
270 * attribute in the first place? */
Brice Goglinfe970642006-08-31 01:55:15 -0400271 if (!pdev->subordinate)
272 return count;
273
Trent Piepho92425a42008-11-30 17:10:12 -0800274 /* Is the flag going to change, or keep the value it already had? */
275 if (!(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) ^
276 !!val) {
277 pdev->subordinate->bus_flags ^= PCI_BUS_FLAGS_NO_MSI;
Brice Goglinfe970642006-08-31 01:55:15 -0400278
Trent Piepho92425a42008-11-30 17:10:12 -0800279 dev_warn(&pdev->dev, "forced subordinate bus to%s support MSI,"
280 " bad things could happen\n", val ? "" : " not");
Brice Goglinfe970642006-08-31 01:55:15 -0400281 }
282
283 return count;
284}
Greg KH98885492005-05-05 11:57:25 -0700285
Alex Chiang705b1aa2009-03-20 14:56:31 -0600286#ifdef CONFIG_HOTPLUG
287static 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
Alex Chiang705b1aa2009-03-20 14:56:31 -0600379#endif
380
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381struct device_attribute pci_dev_attrs[] = {
382 __ATTR_RO(resource),
383 __ATTR_RO(vendor),
384 __ATTR_RO(device),
385 __ATTR_RO(subsystem_vendor),
386 __ATTR_RO(subsystem_device),
387 __ATTR_RO(class),
388 __ATTR_RO(irq),
389 __ATTR_RO(local_cpus),
Mike Travis39106dc2008-04-08 11:43:03 -0700390 __ATTR_RO(local_cpulist),
Greg KH98885492005-05-05 11:57:25 -0700391 __ATTR_RO(modalias),
Brice Goglin81bb0e12007-01-28 10:53:40 +0100392#ifdef CONFIG_NUMA
393 __ATTR_RO(numa_node),
394#endif
Yinghai Lubb965402009-11-24 18:21:21 -0800395 __ATTR_RO(dma_mask_bits),
396 __ATTR_RO(consistent_dma_mask_bits),
Arjan van de Ven9f125d32006-04-29 10:59:08 +0200397 __ATTR(enable, 0600, is_enabled_show, is_enabled_store),
Doug Thompsonbdee9d92006-06-14 16:59:48 -0700398 __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR),
399 broken_parity_status_show,broken_parity_status_store),
Brice Goglinfe970642006-08-31 01:55:15 -0400400 __ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store),
Alex Chiang77c27c72009-03-20 14:56:36 -0600401#ifdef CONFIG_HOTPLUG
402 __ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store),
Alex Chiang738a6392009-03-20 14:56:41 -0600403 __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store),
Alex Chiang77c27c72009-03-20 14:56:36 -0600404#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 __ATTR_NULL,
406};
407
Yinghai Lub9d320f2011-05-12 17:11:39 -0700408struct device_attribute pcibus_dev_attrs[] = {
409#ifdef CONFIG_HOTPLUG
410 __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store),
411#endif
Yinghai Ludc2c2c92011-05-12 17:11:40 -0700412 __ATTR(cpuaffinity, S_IRUGO, pci_bus_show_cpumaskaffinity, NULL),
413 __ATTR(cpulistaffinity, S_IRUGO, pci_bus_show_cpulistaffinity, NULL),
Yinghai Lub9d320f2011-05-12 17:11:39 -0700414 __ATTR_NULL,
415};
416
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417static ssize_t
Dave Airlie217f45d2009-03-04 05:57:05 +0000418boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf)
419{
420 struct pci_dev *pdev = to_pci_dev(dev);
Matthew Garrett1a39b312012-04-16 16:26:02 -0400421 struct pci_dev *vga_dev = vga_default_device();
422
423 if (vga_dev)
424 return sprintf(buf, "%u\n", (pdev == vga_dev));
Dave Airlie217f45d2009-03-04 05:57:05 +0000425
426 return sprintf(buf, "%u\n",
427 !!(pdev->resource[PCI_ROM_RESOURCE].flags &
428 IORESOURCE_ROM_SHADOW));
429}
430struct device_attribute vga_attr = __ATTR_RO(boot_vga);
431
432static ssize_t
Chris Wright2c3c8be2010-05-12 18:28:57 -0700433pci_read_config(struct file *filp, struct kobject *kobj,
434 struct bin_attribute *bin_attr,
Zhang Rui91a69022007-06-09 13:57:22 +0800435 char *buf, loff_t off, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436{
437 struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
438 unsigned int size = 64;
439 loff_t init_off = off;
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900440 u8 *data = (u8*) buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441
442 /* Several chips lock up trying to read undefined config space */
Eric Parisb7e724d2012-01-03 12:25:15 -0500443 if (security_capable(filp->f_cred, &init_user_ns, CAP_SYS_ADMIN) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 size = dev->cfg_size;
445 } else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
446 size = 128;
447 }
448
449 if (off > size)
450 return 0;
451 if (off + count > size) {
452 size -= off;
453 count = size;
454 } else {
455 size = count;
456 }
457
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900458 if ((off & 1) && size) {
459 u8 val;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700460 pci_user_read_config_byte(dev, off, &val);
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900461 data[off - init_off] = val;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 off++;
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900463 size--;
464 }
465
466 if ((off & 3) && size > 2) {
467 u16 val;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700468 pci_user_read_config_word(dev, off, &val);
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900469 data[off - init_off] = val & 0xff;
470 data[off - init_off + 1] = (val >> 8) & 0xff;
471 off += 2;
472 size -= 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 }
474
475 while (size > 3) {
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900476 u32 val;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700477 pci_user_read_config_dword(dev, off, &val);
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900478 data[off - init_off] = val & 0xff;
479 data[off - init_off + 1] = (val >> 8) & 0xff;
480 data[off - init_off + 2] = (val >> 16) & 0xff;
481 data[off - init_off + 3] = (val >> 24) & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 off += 4;
483 size -= 4;
484 }
485
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900486 if (size >= 2) {
487 u16 val;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700488 pci_user_read_config_word(dev, off, &val);
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900489 data[off - init_off] = val & 0xff;
490 data[off - init_off + 1] = (val >> 8) & 0xff;
491 off += 2;
492 size -= 2;
493 }
494
495 if (size > 0) {
496 u8 val;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700497 pci_user_read_config_byte(dev, off, &val);
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900498 data[off - init_off] = val;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 off++;
500 --size;
501 }
502
503 return count;
504}
505
506static ssize_t
Chris Wright2c3c8be2010-05-12 18:28:57 -0700507pci_write_config(struct file* filp, struct kobject *kobj,
508 struct bin_attribute *bin_attr,
Zhang Rui91a69022007-06-09 13:57:22 +0800509 char *buf, loff_t off, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510{
511 struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
512 unsigned int size = count;
513 loff_t init_off = off;
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900514 u8 *data = (u8*) buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515
516 if (off > dev->cfg_size)
517 return 0;
518 if (off + count > dev->cfg_size) {
519 size = dev->cfg_size - off;
520 count = size;
521 }
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900522
523 if ((off & 1) && size) {
Brian Kinge04b0ea2005-09-27 01:21:55 -0700524 pci_user_write_config_byte(dev, off, data[off - init_off]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 off++;
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900526 size--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 }
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900528
529 if ((off & 3) && size > 2) {
530 u16 val = data[off - init_off];
531 val |= (u16) data[off - init_off + 1] << 8;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700532 pci_user_write_config_word(dev, off, val);
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900533 off += 2;
534 size -= 2;
535 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536
537 while (size > 3) {
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900538 u32 val = data[off - init_off];
539 val |= (u32) data[off - init_off + 1] << 8;
540 val |= (u32) data[off - init_off + 2] << 16;
541 val |= (u32) data[off - init_off + 3] << 24;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700542 pci_user_write_config_dword(dev, off, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 off += 4;
544 size -= 4;
545 }
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900546
547 if (size >= 2) {
548 u16 val = data[off - init_off];
549 val |= (u16) data[off - init_off + 1] << 8;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700550 pci_user_write_config_word(dev, off, val);
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900551 off += 2;
552 size -= 2;
553 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900555 if (size) {
Brian Kinge04b0ea2005-09-27 01:21:55 -0700556 pci_user_write_config_byte(dev, off, data[off - init_off]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 off++;
558 --size;
559 }
560
561 return count;
562}
563
Ben Hutchings94e61082008-03-05 16:52:39 +0000564static ssize_t
Chris Wright2c3c8be2010-05-12 18:28:57 -0700565read_vpd_attr(struct file *filp, struct kobject *kobj,
566 struct bin_attribute *bin_attr,
Ben Hutchings94e61082008-03-05 16:52:39 +0000567 char *buf, loff_t off, size_t count)
568{
569 struct pci_dev *dev =
570 to_pci_dev(container_of(kobj, struct device, kobj));
Ben Hutchings94e61082008-03-05 16:52:39 +0000571
572 if (off > bin_attr->size)
573 count = 0;
574 else if (count > bin_attr->size - off)
575 count = bin_attr->size - off;
Ben Hutchings94e61082008-03-05 16:52:39 +0000576
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800577 return pci_read_vpd(dev, off, count, buf);
578}
Ben Hutchings94e61082008-03-05 16:52:39 +0000579
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800580static ssize_t
Chris Wright2c3c8be2010-05-12 18:28:57 -0700581write_vpd_attr(struct file *filp, struct kobject *kobj,
582 struct bin_attribute *bin_attr,
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800583 char *buf, loff_t off, size_t count)
584{
585 struct pci_dev *dev =
586 to_pci_dev(container_of(kobj, struct device, kobj));
587
588 if (off > bin_attr->size)
589 count = 0;
590 else if (count > bin_attr->size - off)
591 count = bin_attr->size - off;
592
593 return pci_write_vpd(dev, off, count, buf);
Ben Hutchings94e61082008-03-05 16:52:39 +0000594}
595
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596#ifdef HAVE_PCI_LEGACY
597/**
598 * pci_read_legacy_io - read byte(s) from legacy I/O port space
Chris Wright2c3c8be2010-05-12 18:28:57 -0700599 * @filp: open sysfs file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 * @kobj: kobject corresponding to file to read from
Randy Dunlapcffb2fa2009-04-10 15:17:50 -0700601 * @bin_attr: struct bin_attribute for this file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 * @buf: buffer to store results
603 * @off: offset into legacy I/O port space
604 * @count: number of bytes to read
605 *
606 * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific
607 * callback routine (pci_legacy_read).
608 */
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000609static ssize_t
Chris Wright2c3c8be2010-05-12 18:28:57 -0700610pci_read_legacy_io(struct file *filp, struct kobject *kobj,
611 struct bin_attribute *bin_attr,
Zhang Rui91a69022007-06-09 13:57:22 +0800612 char *buf, loff_t off, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613{
614 struct pci_bus *bus = to_pci_bus(container_of(kobj,
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -0400615 struct device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 kobj));
617
618 /* Only support 1, 2 or 4 byte accesses */
619 if (count != 1 && count != 2 && count != 4)
620 return -EINVAL;
621
622 return pci_legacy_read(bus, off, (u32 *)buf, count);
623}
624
625/**
626 * pci_write_legacy_io - write byte(s) to legacy I/O port space
Chris Wright2c3c8be2010-05-12 18:28:57 -0700627 * @filp: open sysfs file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 * @kobj: kobject corresponding to file to read from
Randy Dunlapcffb2fa2009-04-10 15:17:50 -0700629 * @bin_attr: struct bin_attribute for this file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 * @buf: buffer containing value to be written
631 * @off: offset into legacy I/O port space
632 * @count: number of bytes to write
633 *
634 * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific
635 * callback routine (pci_legacy_write).
636 */
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000637static ssize_t
Chris Wright2c3c8be2010-05-12 18:28:57 -0700638pci_write_legacy_io(struct file *filp, struct kobject *kobj,
639 struct bin_attribute *bin_attr,
Zhang Rui91a69022007-06-09 13:57:22 +0800640 char *buf, loff_t off, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641{
642 struct pci_bus *bus = to_pci_bus(container_of(kobj,
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -0400643 struct device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 kobj));
645 /* Only support 1, 2 or 4 byte accesses */
646 if (count != 1 && count != 2 && count != 4)
647 return -EINVAL;
648
649 return pci_legacy_write(bus, off, *(u32 *)buf, count);
650}
651
652/**
653 * pci_mmap_legacy_mem - map legacy PCI memory into user memory space
Chris Wright2c3c8be2010-05-12 18:28:57 -0700654 * @filp: open sysfs file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 * @kobj: kobject corresponding to device to be mapped
656 * @attr: struct bin_attribute for this file
657 * @vma: struct vm_area_struct passed to mmap
658 *
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000659 * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 * legacy memory space (first meg of bus space) into application virtual
661 * memory space.
662 */
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000663static int
Chris Wright2c3c8be2010-05-12 18:28:57 -0700664pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj,
665 struct bin_attribute *attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 struct vm_area_struct *vma)
667{
668 struct pci_bus *bus = to_pci_bus(container_of(kobj,
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -0400669 struct device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 kobj));
671
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000672 return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem);
673}
674
675/**
676 * pci_mmap_legacy_io - map legacy PCI IO into user memory space
Chris Wright2c3c8be2010-05-12 18:28:57 -0700677 * @filp: open sysfs file
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000678 * @kobj: kobject corresponding to device to be mapped
679 * @attr: struct bin_attribute for this file
680 * @vma: struct vm_area_struct passed to mmap
681 *
682 * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap
683 * legacy IO space (first meg of bus space) into application virtual
684 * memory space. Returns -ENOSYS if the operation isn't supported
685 */
686static int
Chris Wright2c3c8be2010-05-12 18:28:57 -0700687pci_mmap_legacy_io(struct file *filp, struct kobject *kobj,
688 struct bin_attribute *attr,
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000689 struct vm_area_struct *vma)
690{
691 struct pci_bus *bus = to_pci_bus(container_of(kobj,
692 struct device,
693 kobj));
694
695 return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io);
696}
697
698/**
Ivan Kokshaysky10a0ef32009-02-17 13:46:53 +0300699 * pci_adjust_legacy_attr - adjustment of legacy file attributes
700 * @b: bus to create files under
701 * @mmap_type: I/O port or memory
702 *
703 * Stub implementation. Can be overridden by arch if necessary.
704 */
705void __weak
706pci_adjust_legacy_attr(struct pci_bus *b, enum pci_mmap_state mmap_type)
707{
708 return;
709}
710
711/**
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000712 * pci_create_legacy_files - create legacy I/O port and memory files
713 * @b: bus to create files under
714 *
715 * Some platforms allow access to legacy I/O port and ISA memory space on
716 * a per-bus basis. This routine creates the files and ties them into
717 * their associated read, write and mmap files from pci-sysfs.c
718 *
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300719 * On error unwind, but don't propagate the error to the caller
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000720 * as it is ok to set up the PCI bus without these files.
721 */
722void pci_create_legacy_files(struct pci_bus *b)
723{
724 int error;
725
726 b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2,
727 GFP_ATOMIC);
728 if (!b->legacy_io)
729 goto kzalloc_err;
730
Stephen Rothwell62e877b82010-03-01 20:38:36 +1100731 sysfs_bin_attr_init(b->legacy_io);
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000732 b->legacy_io->attr.name = "legacy_io";
733 b->legacy_io->size = 0xffff;
734 b->legacy_io->attr.mode = S_IRUSR | S_IWUSR;
735 b->legacy_io->read = pci_read_legacy_io;
736 b->legacy_io->write = pci_write_legacy_io;
737 b->legacy_io->mmap = pci_mmap_legacy_io;
Ivan Kokshaysky10a0ef32009-02-17 13:46:53 +0300738 pci_adjust_legacy_attr(b, pci_mmap_io);
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000739 error = device_create_bin_file(&b->dev, b->legacy_io);
740 if (error)
741 goto legacy_io_err;
742
743 /* Allocated above after the legacy_io struct */
744 b->legacy_mem = b->legacy_io + 1;
Mel Gorman6757eca32010-03-10 22:48:34 +0000745 sysfs_bin_attr_init(b->legacy_mem);
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000746 b->legacy_mem->attr.name = "legacy_mem";
747 b->legacy_mem->size = 1024*1024;
748 b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR;
749 b->legacy_mem->mmap = pci_mmap_legacy_mem;
Ivan Kokshaysky10a0ef32009-02-17 13:46:53 +0300750 pci_adjust_legacy_attr(b, pci_mmap_mem);
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000751 error = device_create_bin_file(&b->dev, b->legacy_mem);
752 if (error)
753 goto legacy_mem_err;
754
755 return;
756
757legacy_mem_err:
758 device_remove_bin_file(&b->dev, b->legacy_io);
759legacy_io_err:
760 kfree(b->legacy_io);
761 b->legacy_io = NULL;
762kzalloc_err:
763 printk(KERN_WARNING "pci: warning: could not create legacy I/O port "
764 "and ISA memory resources to sysfs\n");
765 return;
766}
767
768void pci_remove_legacy_files(struct pci_bus *b)
769{
770 if (b->legacy_io) {
771 device_remove_bin_file(&b->dev, b->legacy_io);
772 device_remove_bin_file(&b->dev, b->legacy_mem);
773 kfree(b->legacy_io); /* both are allocated here */
774 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775}
776#endif /* HAVE_PCI_LEGACY */
777
778#ifdef HAVE_PCI_MMAP
Linus Torvaldsb5ff7df2008-10-02 18:52:51 -0700779
Martin Wilck3b519e42010-11-10 11:03:21 +0100780int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma,
781 enum pci_mmap_api mmap_api)
Linus Torvaldsb5ff7df2008-10-02 18:52:51 -0700782{
Martin Wilck3b519e42010-11-10 11:03:21 +0100783 unsigned long nr, start, size, pci_start;
Linus Torvaldsb5ff7df2008-10-02 18:52:51 -0700784
Martin Wilck3b519e42010-11-10 11:03:21 +0100785 if (pci_resource_len(pdev, resno) == 0)
786 return 0;
Linus Torvaldsb5ff7df2008-10-02 18:52:51 -0700787 nr = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
788 start = vma->vm_pgoff;
Ed Swierk88e7df02008-11-03 14:41:16 -0800789 size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1;
Darrick J. Wong8c05cd02010-11-16 09:13:41 -0800790 pci_start = (mmap_api == PCI_MMAP_PROCFS) ?
Martin Wilck3b519e42010-11-10 11:03:21 +0100791 pci_resource_start(pdev, resno) >> PAGE_SHIFT : 0;
792 if (start >= pci_start && start < pci_start + size &&
793 start + nr <= pci_start + size)
Linus Torvaldsb5ff7df2008-10-02 18:52:51 -0700794 return 1;
Linus Torvaldsb5ff7df2008-10-02 18:52:51 -0700795 return 0;
796}
797
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798/**
799 * pci_mmap_resource - map a PCI resource into user memory space
800 * @kobj: kobject for mapping
801 * @attr: struct bin_attribute for the file being mapped
802 * @vma: struct vm_area_struct passed into the mmap
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -0700803 * @write_combine: 1 for write_combine mapping
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 *
805 * Use the regular PCI mapping routines to map a PCI resource into userspace.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 */
807static int
808pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -0700809 struct vm_area_struct *vma, int write_combine)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810{
811 struct pci_dev *pdev = to_pci_dev(container_of(kobj,
812 struct device, kobj));
Kulikov Vasiliya3f58352010-06-29 14:15:28 +0400813 struct resource *res = attr->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 enum pci_mmap_state mmap_type;
Greg Kroah-Hartmane31dd6e2006-06-12 17:06:02 -0700815 resource_size_t start, end;
Michael Ellerman2311b1f2005-05-13 17:44:10 +1000816 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817
Michael Ellerman2311b1f2005-05-13 17:44:10 +1000818 for (i = 0; i < PCI_ROM_RESOURCE; i++)
819 if (res == &pdev->resource[i])
820 break;
821 if (i >= PCI_ROM_RESOURCE)
822 return -ENODEV;
823
Martin Wilck3b519e42010-11-10 11:03:21 +0100824 if (!pci_mmap_fits(pdev, i, vma, PCI_MMAP_SYSFS)) {
825 WARN(1, "process \"%s\" tried to map 0x%08lx bytes "
826 "at page 0x%08lx on %s BAR %d (start 0x%16Lx, size 0x%16Lx)\n",
827 current->comm, vma->vm_end-vma->vm_start, vma->vm_pgoff,
828 pci_name(pdev), i,
Randy Dunlape25cd062010-11-13 08:44:33 -0800829 (u64)pci_resource_start(pdev, i),
830 (u64)pci_resource_len(pdev, i));
Linus Torvaldsb5ff7df2008-10-02 18:52:51 -0700831 return -EINVAL;
Martin Wilck3b519e42010-11-10 11:03:21 +0100832 }
Linus Torvaldsb5ff7df2008-10-02 18:52:51 -0700833
Michael Ellerman2311b1f2005-05-13 17:44:10 +1000834 /* pci_mmap_page_range() expects the same kind of entry as coming
835 * from /proc/bus/pci/ which is a "user visible" value. If this is
836 * different from the resource itself, arch will do necessary fixup.
837 */
838 pci_resource_to_user(pdev, i, res, &start, &end);
839 vma->vm_pgoff += start >> PAGE_SHIFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840 mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;
841
Arjan van de Vene8de1482008-10-22 19:55:31 -0700842 if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(start))
843 return -EINVAL;
844
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -0700845 return pci_mmap_page_range(pdev, vma, mmap_type, write_combine);
846}
847
848static int
Chris Wright2c3c8be2010-05-12 18:28:57 -0700849pci_mmap_resource_uc(struct file *filp, struct kobject *kobj,
850 struct bin_attribute *attr,
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -0700851 struct vm_area_struct *vma)
852{
853 return pci_mmap_resource(kobj, attr, vma, 0);
854}
855
856static int
Chris Wright2c3c8be2010-05-12 18:28:57 -0700857pci_mmap_resource_wc(struct file *filp, struct kobject *kobj,
858 struct bin_attribute *attr,
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -0700859 struct vm_area_struct *vma)
860{
861 return pci_mmap_resource(kobj, attr, vma, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862}
863
Alex Williamson86333282010-07-19 09:45:34 -0600864static ssize_t
865pci_resource_io(struct file *filp, struct kobject *kobj,
866 struct bin_attribute *attr, char *buf,
867 loff_t off, size_t count, bool write)
868{
869 struct pci_dev *pdev = to_pci_dev(container_of(kobj,
870 struct device, kobj));
871 struct resource *res = attr->private;
872 unsigned long port = off;
873 int i;
874
875 for (i = 0; i < PCI_ROM_RESOURCE; i++)
876 if (res == &pdev->resource[i])
877 break;
878 if (i >= PCI_ROM_RESOURCE)
879 return -ENODEV;
880
881 port += pci_resource_start(pdev, i);
882
883 if (port > pci_resource_end(pdev, i))
884 return 0;
885
886 if (port + count - 1 > pci_resource_end(pdev, i))
887 return -EINVAL;
888
889 switch (count) {
890 case 1:
891 if (write)
892 outb(*(u8 *)buf, port);
893 else
894 *(u8 *)buf = inb(port);
895 return 1;
896 case 2:
897 if (write)
898 outw(*(u16 *)buf, port);
899 else
900 *(u16 *)buf = inw(port);
901 return 2;
902 case 4:
903 if (write)
904 outl(*(u32 *)buf, port);
905 else
906 *(u32 *)buf = inl(port);
907 return 4;
908 }
909 return -EINVAL;
910}
911
912static ssize_t
913pci_read_resource_io(struct file *filp, struct kobject *kobj,
914 struct bin_attribute *attr, char *buf,
915 loff_t off, size_t count)
916{
917 return pci_resource_io(filp, kobj, attr, buf, off, count, false);
918}
919
920static ssize_t
921pci_write_resource_io(struct file *filp, struct kobject *kobj,
922 struct bin_attribute *attr, char *buf,
923 loff_t off, size_t count)
924{
925 return pci_resource_io(filp, kobj, attr, buf, off, count, true);
926}
927
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928/**
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -0700929 * pci_remove_resource_files - cleanup resource files
Randy Dunlapcffb2fa2009-04-10 15:17:50 -0700930 * @pdev: dev to cleanup
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -0700931 *
Randy Dunlapcffb2fa2009-04-10 15:17:50 -0700932 * If we created resource files for @pdev, remove them from sysfs and
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -0700933 * free their resources.
934 */
935static void
936pci_remove_resource_files(struct pci_dev *pdev)
937{
938 int i;
939
940 for (i = 0; i < PCI_ROM_RESOURCE; i++) {
941 struct bin_attribute *res_attr;
942
943 res_attr = pdev->res_attr[i];
944 if (res_attr) {
945 sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
946 kfree(res_attr);
947 }
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -0700948
949 res_attr = pdev->res_attr_wc[i];
950 if (res_attr) {
951 sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
952 kfree(res_attr);
953 }
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -0700954 }
955}
956
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -0700957static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine)
958{
959 /* allocate attribute structure, piggyback attribute name */
960 int name_len = write_combine ? 13 : 10;
961 struct bin_attribute *res_attr;
962 int retval;
963
964 res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC);
965 if (res_attr) {
966 char *res_attr_name = (char *)(res_attr + 1);
967
Eric W. Biedermana07e4152010-02-11 15:23:05 -0800968 sysfs_bin_attr_init(res_attr);
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -0700969 if (write_combine) {
970 pdev->res_attr_wc[num] = res_attr;
971 sprintf(res_attr_name, "resource%d_wc", num);
972 res_attr->mmap = pci_mmap_resource_wc;
973 } else {
974 pdev->res_attr[num] = res_attr;
975 sprintf(res_attr_name, "resource%d", num);
976 res_attr->mmap = pci_mmap_resource_uc;
977 }
Alex Williamson86333282010-07-19 09:45:34 -0600978 if (pci_resource_flags(pdev, num) & IORESOURCE_IO) {
979 res_attr->read = pci_read_resource_io;
980 res_attr->write = pci_write_resource_io;
981 }
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -0700982 res_attr->attr.name = res_attr_name;
983 res_attr->attr.mode = S_IRUSR | S_IWUSR;
984 res_attr->size = pci_resource_len(pdev, num);
985 res_attr->private = &pdev->resource[num];
986 retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr);
987 } else
988 retval = -ENOMEM;
989
990 return retval;
991}
992
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -0700993/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 * pci_create_resource_files - create resource files in sysfs for @dev
Randy Dunlapcffb2fa2009-04-10 15:17:50 -0700995 * @pdev: dev in question
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996 *
Randy Dunlapcffb2fa2009-04-10 15:17:50 -0700997 * Walk the resources in @pdev creating files for each resource available.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998 */
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -0700999static int pci_create_resource_files(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000{
1001 int i;
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001002 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003
1004 /* Expose the PCI resources from this device as files */
1005 for (i = 0; i < PCI_ROM_RESOURCE; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006
1007 /* skip empty resources */
1008 if (!pci_resource_len(pdev, i))
1009 continue;
1010
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -07001011 retval = pci_create_attr(pdev, i, 0);
1012 /* for prefetchable resources, create a WC mappable file */
1013 if (!retval && pdev->resource[i].flags & IORESOURCE_PREFETCH)
1014 retval = pci_create_attr(pdev, i, 1);
Dmitry Torokhovd48593b2005-04-29 00:58:46 -05001015
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -07001016 if (retval) {
1017 pci_remove_resource_files(pdev);
1018 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019 }
1020 }
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001021 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022}
1023#else /* !HAVE_PCI_MMAP */
Ivan Kokshaysky10a0ef32009-02-17 13:46:53 +03001024int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; }
1025void __weak pci_remove_resource_files(struct pci_dev *dev) { return; }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026#endif /* HAVE_PCI_MMAP */
1027
1028/**
1029 * pci_write_rom - used to enable access to the PCI ROM display
Chris Wright2c3c8be2010-05-12 18:28:57 -07001030 * @filp: sysfs file
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031 * @kobj: kernel object handle
Randy Dunlapcffb2fa2009-04-10 15:17:50 -07001032 * @bin_attr: struct bin_attribute for this file
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 * @buf: user input
1034 * @off: file offset
1035 * @count: number of byte in input
1036 *
1037 * writing anything except 0 enables it
1038 */
1039static ssize_t
Chris Wright2c3c8be2010-05-12 18:28:57 -07001040pci_write_rom(struct file *filp, struct kobject *kobj,
1041 struct bin_attribute *bin_attr,
Zhang Rui91a69022007-06-09 13:57:22 +08001042 char *buf, loff_t off, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043{
1044 struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
1045
1046 if ((off == 0) && (*buf == '0') && (count == 2))
1047 pdev->rom_attr_enabled = 0;
1048 else
1049 pdev->rom_attr_enabled = 1;
1050
1051 return count;
1052}
1053
1054/**
1055 * pci_read_rom - read a PCI ROM
Chris Wright2c3c8be2010-05-12 18:28:57 -07001056 * @filp: sysfs file
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 * @kobj: kernel object handle
Randy Dunlapcffb2fa2009-04-10 15:17:50 -07001058 * @bin_attr: struct bin_attribute for this file
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059 * @buf: where to put the data we read from the ROM
1060 * @off: file offset
1061 * @count: number of bytes to read
1062 *
1063 * Put @count bytes starting at @off into @buf from the ROM in the PCI
1064 * device corresponding to @kobj.
1065 */
1066static ssize_t
Chris Wright2c3c8be2010-05-12 18:28:57 -07001067pci_read_rom(struct file *filp, struct kobject *kobj,
1068 struct bin_attribute *bin_attr,
Zhang Rui91a69022007-06-09 13:57:22 +08001069 char *buf, loff_t off, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070{
1071 struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
1072 void __iomem *rom;
1073 size_t size;
1074
1075 if (!pdev->rom_attr_enabled)
1076 return -EINVAL;
1077
1078 rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */
Timothy S. Nelson97c44832009-01-30 06:12:47 +11001079 if (!rom || !size)
1080 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081
1082 if (off >= size)
1083 count = 0;
1084 else {
1085 if (off + count > size)
1086 count = size - off;
1087
1088 memcpy_fromio(buf, rom + off, count);
1089 }
1090 pci_unmap_rom(pdev, rom);
1091
1092 return count;
1093}
1094
1095static struct bin_attribute pci_config_attr = {
1096 .attr = {
1097 .name = "config",
1098 .mode = S_IRUGO | S_IWUSR,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099 },
Zhao, Yu557848c2008-10-13 19:18:07 +08001100 .size = PCI_CFG_SPACE_SIZE,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101 .read = pci_read_config,
1102 .write = pci_write_config,
1103};
1104
1105static struct bin_attribute pcie_config_attr = {
1106 .attr = {
1107 .name = "config",
1108 .mode = S_IRUGO | S_IWUSR,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 },
Zhao, Yu557848c2008-10-13 19:18:07 +08001110 .size = PCI_CFG_SPACE_EXP_SIZE,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 .read = pci_read_config,
1112 .write = pci_write_config,
1113};
1114
Michael Ellermana2cd52c2007-05-08 12:03:08 +10001115int __attribute__ ((weak)) pcibios_add_platform_entries(struct pci_dev *dev)
Michael Ellerman575e3342007-05-08 12:03:07 +10001116{
Michael Ellermana2cd52c2007-05-08 12:03:08 +10001117 return 0;
Michael Ellerman575e3342007-05-08 12:03:07 +10001118}
1119
Michael S. Tsirkin711d5772009-07-27 23:37:48 +03001120static ssize_t reset_store(struct device *dev,
1121 struct device_attribute *attr, const char *buf,
1122 size_t count)
1123{
1124 struct pci_dev *pdev = to_pci_dev(dev);
1125 unsigned long val;
1126 ssize_t result = strict_strtoul(buf, 0, &val);
1127
1128 if (result < 0)
1129 return result;
1130
1131 if (val != 1)
1132 return -EINVAL;
Michal Schmidt447c5dd2010-05-11 11:44:54 +02001133
1134 result = pci_reset_function(pdev);
1135 if (result < 0)
1136 return result;
1137
1138 return count;
Michael S. Tsirkin711d5772009-07-27 23:37:48 +03001139}
1140
1141static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store);
1142
Zhao, Yu280c73d2008-10-13 20:01:00 +08001143static int pci_create_capabilities_sysfs(struct pci_dev *dev)
1144{
1145 int retval;
1146 struct bin_attribute *attr;
1147
1148 /* If the device has VPD, try to expose it in sysfs. */
1149 if (dev->vpd) {
1150 attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
1151 if (!attr)
1152 return -ENOMEM;
1153
Eric W. Biedermana07e4152010-02-11 15:23:05 -08001154 sysfs_bin_attr_init(attr);
Zhao, Yu280c73d2008-10-13 20:01:00 +08001155 attr->size = dev->vpd->len;
1156 attr->attr.name = "vpd";
1157 attr->attr.mode = S_IRUSR | S_IWUSR;
Stephen Hemminger287d19c2008-12-18 09:17:16 -08001158 attr->read = read_vpd_attr;
1159 attr->write = write_vpd_attr;
Zhao, Yu280c73d2008-10-13 20:01:00 +08001160 retval = sysfs_create_bin_file(&dev->dev.kobj, attr);
1161 if (retval) {
Ben Hutchings0f12a4e2011-01-13 19:47:56 +00001162 kfree(attr);
Zhao, Yu280c73d2008-10-13 20:01:00 +08001163 return retval;
1164 }
1165 dev->vpd->attr = attr;
1166 }
1167
1168 /* Active State Power Management */
1169 pcie_aspm_create_sysfs_dev_files(dev);
1170
Michael S. Tsirkin711d5772009-07-27 23:37:48 +03001171 if (!pci_probe_reset_function(dev)) {
1172 retval = device_create_file(&dev->dev, &reset_attr);
1173 if (retval)
1174 goto error;
1175 dev->reset_fn = 1;
1176 }
Zhao, Yu280c73d2008-10-13 20:01:00 +08001177 return 0;
Michael S. Tsirkin711d5772009-07-27 23:37:48 +03001178
1179error:
1180 pcie_aspm_remove_sysfs_dev_files(dev);
1181 if (dev->vpd && dev->vpd->attr) {
1182 sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
1183 kfree(dev->vpd->attr);
1184 }
1185
1186 return retval;
Zhao, Yu280c73d2008-10-13 20:01:00 +08001187}
1188
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001189int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190{
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001191 int retval;
Zhao, Yu280c73d2008-10-13 20:01:00 +08001192 int rom_size = 0;
1193 struct bin_attribute *attr;
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001194
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195 if (!sysfs_initialized)
1196 return -EACCES;
1197
Zhao, Yu557848c2008-10-13 19:18:07 +08001198 if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001199 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200 else
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001201 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr);
1202 if (retval)
1203 goto err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001205 retval = pci_create_resource_files(pdev);
1206 if (retval)
Zhao, Yu280c73d2008-10-13 20:01:00 +08001207 goto err_config_file;
1208
1209 if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
1210 rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
1211 else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)
1212 rom_size = 0x20000;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213
1214 /* If the device has a ROM, try to expose it in sysfs. */
Zhao, Yu280c73d2008-10-13 20:01:00 +08001215 if (rom_size) {
Ben Hutchings94e61082008-03-05 16:52:39 +00001216 attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
Zhao, Yu280c73d2008-10-13 20:01:00 +08001217 if (!attr) {
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001218 retval = -ENOMEM;
Michael Ellerman9890b122007-04-18 13:34:12 +10001219 goto err_resource_files;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 }
Eric W. Biedermana07e4152010-02-11 15:23:05 -08001221 sysfs_bin_attr_init(attr);
Zhao, Yu280c73d2008-10-13 20:01:00 +08001222 attr->size = rom_size;
1223 attr->attr.name = "rom";
Alex Williamsonff295302011-01-05 10:26:41 -07001224 attr->attr.mode = S_IRUSR | S_IWUSR;
Zhao, Yu280c73d2008-10-13 20:01:00 +08001225 attr->read = pci_read_rom;
1226 attr->write = pci_write_rom;
1227 retval = sysfs_create_bin_file(&pdev->dev.kobj, attr);
1228 if (retval) {
1229 kfree(attr);
1230 goto err_resource_files;
1231 }
1232 pdev->rom_attr = attr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233 }
Zhao, Yu280c73d2008-10-13 20:01:00 +08001234
Dave Airlie217f45d2009-03-04 05:57:05 +00001235 if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) {
1236 retval = device_create_file(&pdev->dev, &vga_attr);
1237 if (retval)
1238 goto err_rom_file;
1239 }
1240
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241 /* add platform-specific attributes */
Zhao, Yu280c73d2008-10-13 20:01:00 +08001242 retval = pcibios_add_platform_entries(pdev);
1243 if (retval)
Dave Airlie217f45d2009-03-04 05:57:05 +00001244 goto err_vga_file;
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001245
Zhao, Yu280c73d2008-10-13 20:01:00 +08001246 /* add sysfs entries for various capabilities */
1247 retval = pci_create_capabilities_sysfs(pdev);
1248 if (retval)
Dave Airlie217f45d2009-03-04 05:57:05 +00001249 goto err_vga_file;
Shaohua Li7d715a62008-02-25 09:46:41 +08001250
Narendra K911e1c92010-07-26 05:56:50 -05001251 pci_create_firmware_label_files(pdev);
1252
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253 return 0;
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001254
Dave Airlie217f45d2009-03-04 05:57:05 +00001255err_vga_file:
1256 if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA)
1257 device_remove_file(&pdev->dev, &vga_attr);
Michael Ellermana2cd52c2007-05-08 12:03:08 +10001258err_rom_file:
Zhao, Yu280c73d2008-10-13 20:01:00 +08001259 if (rom_size) {
Ben Hutchings94e61082008-03-05 16:52:39 +00001260 sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
Zhao, Yu280c73d2008-10-13 20:01:00 +08001261 kfree(pdev->rom_attr);
1262 pdev->rom_attr = NULL;
1263 }
Michael Ellerman9890b122007-04-18 13:34:12 +10001264err_resource_files:
1265 pci_remove_resource_files(pdev);
Ben Hutchings94e61082008-03-05 16:52:39 +00001266err_config_file:
Zhao, Yu557848c2008-10-13 19:18:07 +08001267 if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001268 sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
1269 else
1270 sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
1271err:
1272 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273}
1274
Zhao, Yu280c73d2008-10-13 20:01:00 +08001275static void pci_remove_capabilities_sysfs(struct pci_dev *dev)
1276{
1277 if (dev->vpd && dev->vpd->attr) {
1278 sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
1279 kfree(dev->vpd->attr);
1280 }
1281
1282 pcie_aspm_remove_sysfs_dev_files(dev);
Michael S. Tsirkin711d5772009-07-27 23:37:48 +03001283 if (dev->reset_fn) {
1284 device_remove_file(&dev->dev, &reset_attr);
1285 dev->reset_fn = 0;
1286 }
Zhao, Yu280c73d2008-10-13 20:01:00 +08001287}
1288
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289/**
1290 * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files
1291 * @pdev: device whose entries we should free
1292 *
1293 * Cleanup when @pdev is removed from sysfs.
1294 */
1295void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
1296{
Zhao, Yu280c73d2008-10-13 20:01:00 +08001297 int rom_size = 0;
1298
David Millerd67afe52006-11-10 12:27:48 -08001299 if (!sysfs_initialized)
1300 return;
1301
Zhao, Yu280c73d2008-10-13 20:01:00 +08001302 pci_remove_capabilities_sysfs(pdev);
Shaohua Li7d715a62008-02-25 09:46:41 +08001303
Zhao, Yu557848c2008-10-13 19:18:07 +08001304 if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
1306 else
1307 sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
1308
1309 pci_remove_resource_files(pdev);
1310
Zhao, Yu280c73d2008-10-13 20:01:00 +08001311 if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
1312 rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
1313 else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)
1314 rom_size = 0x20000;
1315
1316 if (rom_size && pdev->rom_attr) {
1317 sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
1318 kfree(pdev->rom_attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001319 }
Narendra K911e1c92010-07-26 05:56:50 -05001320
1321 pci_remove_firmware_label_files(pdev);
1322
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323}
1324
1325static int __init pci_sysfs_init(void)
1326{
1327 struct pci_dev *pdev = NULL;
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001328 int retval;
1329
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330 sysfs_initialized = 1;
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001331 for_each_pci_dev(pdev) {
1332 retval = pci_create_sysfs_dev_files(pdev);
Julia Lawall151fc5d2007-11-20 08:41:16 +01001333 if (retval) {
1334 pci_dev_put(pdev);
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001335 return retval;
Julia Lawall151fc5d2007-11-20 08:41:16 +01001336 }
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001337 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338
1339 return 0;
1340}
1341
Jesse Barnes40ee9e92007-03-24 11:03:32 -07001342late_initcall(pci_sysfs_init);