blob: 807224ec8351f819250f6b9c1a3caff97c3275e6 [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>
22#include <linux/topology.h>
23#include <linux/mm.h>
Alexey Dobriyanaa0ac362007-07-15 23:40:39 -070024#include <linux/capability.h>
Shaohua Li7d715a62008-02-25 09:46:41 +080025#include <linux/pci-aspm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include "pci.h"
27
28static int sysfs_initialized; /* = 0 */
29
30/* show configuration fields */
31#define pci_config_attr(field, format_string) \
32static ssize_t \
Yani Ioannoue404e272005-05-17 06:42:58 -040033field##_show(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -070034{ \
35 struct pci_dev *pdev; \
36 \
37 pdev = to_pci_dev (dev); \
38 return sprintf (buf, format_string, pdev->field); \
39}
40
41pci_config_attr(vendor, "0x%04x\n");
42pci_config_attr(device, "0x%04x\n");
43pci_config_attr(subsystem_vendor, "0x%04x\n");
44pci_config_attr(subsystem_device, "0x%04x\n");
45pci_config_attr(class, "0x%06x\n");
46pci_config_attr(irq, "%u\n");
47
Doug Thompsonbdee9d92006-06-14 16:59:48 -070048static ssize_t broken_parity_status_show(struct device *dev,
49 struct device_attribute *attr,
50 char *buf)
51{
52 struct pci_dev *pdev = to_pci_dev(dev);
53 return sprintf (buf, "%u\n", pdev->broken_parity_status);
54}
55
56static ssize_t broken_parity_status_store(struct device *dev,
57 struct device_attribute *attr,
58 const char *buf, size_t count)
59{
60 struct pci_dev *pdev = to_pci_dev(dev);
Trent Piepho92425a42008-11-30 17:10:12 -080061 unsigned long val;
Doug Thompsonbdee9d92006-06-14 16:59:48 -070062
Trent Piepho92425a42008-11-30 17:10:12 -080063 if (strict_strtoul(buf, 0, &val) < 0)
64 return -EINVAL;
65
66 pdev->broken_parity_status = !!val;
67
68 return count;
Doug Thompsonbdee9d92006-06-14 16:59:48 -070069}
70
Alan Cox4327edf2005-09-10 00:25:49 -070071static ssize_t local_cpus_show(struct device *dev,
72 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -070073{
Mike Travis3be83052009-01-04 05:18:01 -080074 const struct cpumask *mask;
Alan Cox4327edf2005-09-10 00:25:49 -070075 int len;
76
Andreas Herrmanne0cd5162009-04-17 12:01:55 +020077#ifdef CONFIG_NUMA
David John6be954d2010-01-04 20:28:57 +053078 mask = (dev_to_node(dev) == -1) ? cpu_online_mask :
79 cpumask_of_node(dev_to_node(dev));
Andreas Herrmanne0cd5162009-04-17 12:01:55 +020080#else
Mike Travis3be83052009-01-04 05:18:01 -080081 mask = cpumask_of_pcibus(to_pci_dev(dev)->bus);
Andreas Herrmanne0cd5162009-04-17 12:01:55 +020082#endif
Mike Travis3be83052009-01-04 05:18:01 -080083 len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask);
Mike Travis39106dc2008-04-08 11:43:03 -070084 buf[len++] = '\n';
85 buf[len] = '\0';
86 return len;
87}
88
89
90static ssize_t local_cpulist_show(struct device *dev,
91 struct device_attribute *attr, char *buf)
92{
Mike Travis3be83052009-01-04 05:18:01 -080093 const struct cpumask *mask;
Mike Travis39106dc2008-04-08 11:43:03 -070094 int len;
95
Andreas Herrmanne0cd5162009-04-17 12:01:55 +020096#ifdef CONFIG_NUMA
David John6be954d2010-01-04 20:28:57 +053097 mask = (dev_to_node(dev) == -1) ? cpu_online_mask :
98 cpumask_of_node(dev_to_node(dev));
Andreas Herrmanne0cd5162009-04-17 12:01:55 +020099#else
Mike Travis3be83052009-01-04 05:18:01 -0800100 mask = cpumask_of_pcibus(to_pci_dev(dev)->bus);
Andreas Herrmanne0cd5162009-04-17 12:01:55 +0200101#endif
Mike Travis3be83052009-01-04 05:18:01 -0800102 len = cpulist_scnprintf(buf, PAGE_SIZE-2, mask);
Mike Travis39106dc2008-04-08 11:43:03 -0700103 buf[len++] = '\n';
104 buf[len] = '\0';
105 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106}
107
108/* show resources */
109static ssize_t
Yani Ioannoue404e272005-05-17 06:42:58 -0400110resource_show(struct device * dev, struct device_attribute *attr, char * buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111{
112 struct pci_dev * pci_dev = to_pci_dev(dev);
113 char * str = buf;
114 int i;
Yu Zhaofde09c62008-11-22 02:39:32 +0800115 int max;
Greg Kroah-Hartmane31dd6e2006-06-12 17:06:02 -0700116 resource_size_t start, end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117
118 if (pci_dev->subordinate)
119 max = DEVICE_COUNT_RESOURCE;
Yu Zhaofde09c62008-11-22 02:39:32 +0800120 else
121 max = PCI_BRIDGE_RESOURCES;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122
123 for (i = 0; i < max; i++) {
Michael Ellerman2311b1f2005-05-13 17:44:10 +1000124 struct resource *res = &pci_dev->resource[i];
125 pci_resource_to_user(pci_dev, i, res, &start, &end);
126 str += sprintf(str,"0x%016llx 0x%016llx 0x%016llx\n",
127 (unsigned long long)start,
128 (unsigned long long)end,
129 (unsigned long long)res->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 }
131 return (str - buf);
132}
133
Greg Kroah-Hartman87c8a442005-06-19 12:21:43 +0200134static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
Greg KH98885492005-05-05 11:57:25 -0700135{
136 struct pci_dev *pci_dev = to_pci_dev(dev);
137
138 return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n",
139 pci_dev->vendor, pci_dev->device,
140 pci_dev->subsystem_vendor, pci_dev->subsystem_device,
141 (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8),
142 (u8)(pci_dev->class));
143}
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -0800144
145static ssize_t is_enabled_store(struct device *dev,
146 struct device_attribute *attr, const char *buf,
147 size_t count)
Arjan van de Ven9f125d32006-04-29 10:59:08 +0200148{
149 struct pci_dev *pdev = to_pci_dev(dev);
Trent Piepho92425a42008-11-30 17:10:12 -0800150 unsigned long val;
151 ssize_t result = strict_strtoul(buf, 0, &val);
152
153 if (result < 0)
154 return result;
Arjan van de Ven9f125d32006-04-29 10:59:08 +0200155
156 /* this can crash the machine when done on the "wrong" device */
157 if (!capable(CAP_SYS_ADMIN))
Trent Piepho92425a42008-11-30 17:10:12 -0800158 return -EPERM;
Arjan van de Ven9f125d32006-04-29 10:59:08 +0200159
Trent Piepho92425a42008-11-30 17:10:12 -0800160 if (!val) {
Yuji Shimada296ccb02009-04-03 16:41:46 +0900161 if (pci_is_enabled(pdev))
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -0800162 pci_disable_device(pdev);
163 else
164 result = -EIO;
Trent Piepho92425a42008-11-30 17:10:12 -0800165 } else
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -0800166 result = pci_enable_device(pdev);
Arjan van de Ven9f125d32006-04-29 10:59:08 +0200167
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -0800168 return result < 0 ? result : count;
169}
Arjan van de Ven9f125d32006-04-29 10:59:08 +0200170
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -0800171static ssize_t is_enabled_show(struct device *dev,
172 struct device_attribute *attr, char *buf)
173{
174 struct pci_dev *pdev;
175
176 pdev = to_pci_dev (dev);
177 return sprintf (buf, "%u\n", atomic_read(&pdev->enable_cnt));
Arjan van de Ven9f125d32006-04-29 10:59:08 +0200178}
179
Brice Goglin81bb0e12007-01-28 10:53:40 +0100180#ifdef CONFIG_NUMA
181static ssize_t
182numa_node_show(struct device *dev, struct device_attribute *attr, char *buf)
183{
184 return sprintf (buf, "%d\n", dev->numa_node);
185}
186#endif
187
Brice Goglinfe970642006-08-31 01:55:15 -0400188static ssize_t
Yinghai Lubb965402009-11-24 18:21:21 -0800189dma_mask_bits_show(struct device *dev, struct device_attribute *attr, char *buf)
190{
191 struct pci_dev *pdev = to_pci_dev(dev);
192
193 return sprintf (buf, "%d\n", fls64(pdev->dma_mask));
194}
195
196static ssize_t
197consistent_dma_mask_bits_show(struct device *dev, struct device_attribute *attr,
198 char *buf)
199{
200 return sprintf (buf, "%d\n", fls64(dev->coherent_dma_mask));
201}
202
203static ssize_t
Brice Goglinfe970642006-08-31 01:55:15 -0400204msi_bus_show(struct device *dev, struct device_attribute *attr, char *buf)
205{
206 struct pci_dev *pdev = to_pci_dev(dev);
207
208 if (!pdev->subordinate)
209 return 0;
210
211 return sprintf (buf, "%u\n",
212 !(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI));
213}
214
215static ssize_t
216msi_bus_store(struct device *dev, struct device_attribute *attr,
217 const char *buf, size_t count)
218{
219 struct pci_dev *pdev = to_pci_dev(dev);
Trent Piepho92425a42008-11-30 17:10:12 -0800220 unsigned long val;
221
222 if (strict_strtoul(buf, 0, &val) < 0)
223 return -EINVAL;
Brice Goglinfe970642006-08-31 01:55:15 -0400224
225 /* bad things may happen if the no_msi flag is changed
226 * while some drivers are loaded */
227 if (!capable(CAP_SYS_ADMIN))
Trent Piepho92425a42008-11-30 17:10:12 -0800228 return -EPERM;
Brice Goglinfe970642006-08-31 01:55:15 -0400229
Trent Piepho92425a42008-11-30 17:10:12 -0800230 /* Maybe pci devices without subordinate busses shouldn't even have this
231 * attribute in the first place? */
Brice Goglinfe970642006-08-31 01:55:15 -0400232 if (!pdev->subordinate)
233 return count;
234
Trent Piepho92425a42008-11-30 17:10:12 -0800235 /* Is the flag going to change, or keep the value it already had? */
236 if (!(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) ^
237 !!val) {
238 pdev->subordinate->bus_flags ^= PCI_BUS_FLAGS_NO_MSI;
Brice Goglinfe970642006-08-31 01:55:15 -0400239
Trent Piepho92425a42008-11-30 17:10:12 -0800240 dev_warn(&pdev->dev, "forced subordinate bus to%s support MSI,"
241 " bad things could happen\n", val ? "" : " not");
Brice Goglinfe970642006-08-31 01:55:15 -0400242 }
243
244 return count;
245}
Greg KH98885492005-05-05 11:57:25 -0700246
Alex Chiang705b1aa2009-03-20 14:56:31 -0600247#ifdef CONFIG_HOTPLUG
248static DEFINE_MUTEX(pci_remove_rescan_mutex);
249static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf,
250 size_t count)
251{
252 unsigned long val;
253 struct pci_bus *b = NULL;
254
255 if (strict_strtoul(buf, 0, &val) < 0)
256 return -EINVAL;
257
258 if (val) {
259 mutex_lock(&pci_remove_rescan_mutex);
260 while ((b = pci_find_next_bus(b)) != NULL)
261 pci_rescan_bus(b);
262 mutex_unlock(&pci_remove_rescan_mutex);
263 }
264 return count;
265}
266
267struct bus_attribute pci_bus_attrs[] = {
268 __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store),
269 __ATTR_NULL
270};
Alex Chiang77c27c72009-03-20 14:56:36 -0600271
Alex Chiang738a6392009-03-20 14:56:41 -0600272static ssize_t
273dev_rescan_store(struct device *dev, struct device_attribute *attr,
274 const char *buf, size_t count)
275{
276 unsigned long val;
277 struct pci_dev *pdev = to_pci_dev(dev);
278
279 if (strict_strtoul(buf, 0, &val) < 0)
280 return -EINVAL;
281
282 if (val) {
283 mutex_lock(&pci_remove_rescan_mutex);
284 pci_rescan_bus(pdev->bus);
285 mutex_unlock(&pci_remove_rescan_mutex);
286 }
287 return count;
288}
289
Alex Chiang77c27c72009-03-20 14:56:36 -0600290static void remove_callback(struct device *dev)
291{
292 struct pci_dev *pdev = to_pci_dev(dev);
293
294 mutex_lock(&pci_remove_rescan_mutex);
295 pci_remove_bus_device(pdev);
296 mutex_unlock(&pci_remove_rescan_mutex);
297}
298
299static ssize_t
300remove_store(struct device *dev, struct device_attribute *dummy,
301 const char *buf, size_t count)
302{
303 int ret = 0;
304 unsigned long val;
Alex Chiang77c27c72009-03-20 14:56:36 -0600305
306 if (strict_strtoul(buf, 0, &val) < 0)
307 return -EINVAL;
308
Alex Chiang77c27c72009-03-20 14:56:36 -0600309 /* An attribute cannot be unregistered by one of its own methods,
310 * so we have to use this roundabout approach.
311 */
312 if (val)
313 ret = device_schedule_callback(dev, remove_callback);
314 if (ret)
315 count = ret;
316 return count;
317}
Alex Chiang705b1aa2009-03-20 14:56:31 -0600318#endif
319
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320struct device_attribute pci_dev_attrs[] = {
321 __ATTR_RO(resource),
322 __ATTR_RO(vendor),
323 __ATTR_RO(device),
324 __ATTR_RO(subsystem_vendor),
325 __ATTR_RO(subsystem_device),
326 __ATTR_RO(class),
327 __ATTR_RO(irq),
328 __ATTR_RO(local_cpus),
Mike Travis39106dc2008-04-08 11:43:03 -0700329 __ATTR_RO(local_cpulist),
Greg KH98885492005-05-05 11:57:25 -0700330 __ATTR_RO(modalias),
Brice Goglin81bb0e12007-01-28 10:53:40 +0100331#ifdef CONFIG_NUMA
332 __ATTR_RO(numa_node),
333#endif
Yinghai Lubb965402009-11-24 18:21:21 -0800334 __ATTR_RO(dma_mask_bits),
335 __ATTR_RO(consistent_dma_mask_bits),
Arjan van de Ven9f125d32006-04-29 10:59:08 +0200336 __ATTR(enable, 0600, is_enabled_show, is_enabled_store),
Doug Thompsonbdee9d92006-06-14 16:59:48 -0700337 __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR),
338 broken_parity_status_show,broken_parity_status_store),
Brice Goglinfe970642006-08-31 01:55:15 -0400339 __ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store),
Alex Chiang77c27c72009-03-20 14:56:36 -0600340#ifdef CONFIG_HOTPLUG
341 __ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store),
Alex Chiang738a6392009-03-20 14:56:41 -0600342 __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store),
Alex Chiang77c27c72009-03-20 14:56:36 -0600343#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 __ATTR_NULL,
345};
346
347static ssize_t
Dave Airlie217f45d2009-03-04 05:57:05 +0000348boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf)
349{
350 struct pci_dev *pdev = to_pci_dev(dev);
351
352 return sprintf(buf, "%u\n",
353 !!(pdev->resource[PCI_ROM_RESOURCE].flags &
354 IORESOURCE_ROM_SHADOW));
355}
356struct device_attribute vga_attr = __ATTR_RO(boot_vga);
357
358static ssize_t
Zhang Rui91a69022007-06-09 13:57:22 +0800359pci_read_config(struct kobject *kobj, struct bin_attribute *bin_attr,
360 char *buf, loff_t off, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361{
362 struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
363 unsigned int size = 64;
364 loff_t init_off = off;
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900365 u8 *data = (u8*) buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366
367 /* Several chips lock up trying to read undefined config space */
368 if (capable(CAP_SYS_ADMIN)) {
369 size = dev->cfg_size;
370 } else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
371 size = 128;
372 }
373
374 if (off > size)
375 return 0;
376 if (off + count > size) {
377 size -= off;
378 count = size;
379 } else {
380 size = count;
381 }
382
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900383 if ((off & 1) && size) {
384 u8 val;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700385 pci_user_read_config_byte(dev, off, &val);
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900386 data[off - init_off] = val;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 off++;
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900388 size--;
389 }
390
391 if ((off & 3) && size > 2) {
392 u16 val;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700393 pci_user_read_config_word(dev, off, &val);
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900394 data[off - init_off] = val & 0xff;
395 data[off - init_off + 1] = (val >> 8) & 0xff;
396 off += 2;
397 size -= 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 }
399
400 while (size > 3) {
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900401 u32 val;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700402 pci_user_read_config_dword(dev, off, &val);
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900403 data[off - init_off] = val & 0xff;
404 data[off - init_off + 1] = (val >> 8) & 0xff;
405 data[off - init_off + 2] = (val >> 16) & 0xff;
406 data[off - init_off + 3] = (val >> 24) & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 off += 4;
408 size -= 4;
409 }
410
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900411 if (size >= 2) {
412 u16 val;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700413 pci_user_read_config_word(dev, off, &val);
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900414 data[off - init_off] = val & 0xff;
415 data[off - init_off + 1] = (val >> 8) & 0xff;
416 off += 2;
417 size -= 2;
418 }
419
420 if (size > 0) {
421 u8 val;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700422 pci_user_read_config_byte(dev, off, &val);
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900423 data[off - init_off] = val;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 off++;
425 --size;
426 }
427
428 return count;
429}
430
431static ssize_t
Zhang Rui91a69022007-06-09 13:57:22 +0800432pci_write_config(struct kobject *kobj, struct bin_attribute *bin_attr,
433 char *buf, loff_t off, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434{
435 struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
436 unsigned int size = count;
437 loff_t init_off = off;
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900438 u8 *data = (u8*) buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
440 if (off > dev->cfg_size)
441 return 0;
442 if (off + count > dev->cfg_size) {
443 size = dev->cfg_size - off;
444 count = size;
445 }
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900446
447 if ((off & 1) && size) {
Brian Kinge04b0ea2005-09-27 01:21:55 -0700448 pci_user_write_config_byte(dev, off, data[off - init_off]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 off++;
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900450 size--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 }
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900452
453 if ((off & 3) && size > 2) {
454 u16 val = data[off - init_off];
455 val |= (u16) data[off - init_off + 1] << 8;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700456 pci_user_write_config_word(dev, off, val);
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900457 off += 2;
458 size -= 2;
459 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460
461 while (size > 3) {
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900462 u32 val = data[off - init_off];
463 val |= (u32) data[off - init_off + 1] << 8;
464 val |= (u32) data[off - init_off + 2] << 16;
465 val |= (u32) data[off - init_off + 3] << 24;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700466 pci_user_write_config_dword(dev, off, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 off += 4;
468 size -= 4;
469 }
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900470
471 if (size >= 2) {
472 u16 val = data[off - init_off];
473 val |= (u16) data[off - init_off + 1] << 8;
Brian Kinge04b0ea2005-09-27 01:21:55 -0700474 pci_user_write_config_word(dev, off, val);
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900475 off += 2;
476 size -= 2;
477 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
ssant@in.ibm.com4c0619a2005-04-08 14:53:31 +0900479 if (size) {
Brian Kinge04b0ea2005-09-27 01:21:55 -0700480 pci_user_write_config_byte(dev, off, data[off - init_off]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 off++;
482 --size;
483 }
484
485 return count;
486}
487
Ben Hutchings94e61082008-03-05 16:52:39 +0000488static ssize_t
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800489read_vpd_attr(struct kobject *kobj, struct bin_attribute *bin_attr,
Ben Hutchings94e61082008-03-05 16:52:39 +0000490 char *buf, loff_t off, size_t count)
491{
492 struct pci_dev *dev =
493 to_pci_dev(container_of(kobj, struct device, kobj));
Ben Hutchings94e61082008-03-05 16:52:39 +0000494
495 if (off > bin_attr->size)
496 count = 0;
497 else if (count > bin_attr->size - off)
498 count = bin_attr->size - off;
Ben Hutchings94e61082008-03-05 16:52:39 +0000499
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800500 return pci_read_vpd(dev, off, count, buf);
501}
Ben Hutchings94e61082008-03-05 16:52:39 +0000502
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800503static ssize_t
504write_vpd_attr(struct kobject *kobj, struct bin_attribute *bin_attr,
505 char *buf, loff_t off, size_t count)
506{
507 struct pci_dev *dev =
508 to_pci_dev(container_of(kobj, struct device, kobj));
509
510 if (off > bin_attr->size)
511 count = 0;
512 else if (count > bin_attr->size - off)
513 count = bin_attr->size - off;
514
515 return pci_write_vpd(dev, off, count, buf);
Ben Hutchings94e61082008-03-05 16:52:39 +0000516}
517
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518#ifdef HAVE_PCI_LEGACY
519/**
520 * pci_read_legacy_io - read byte(s) from legacy I/O port space
521 * @kobj: kobject corresponding to file to read from
Randy Dunlapcffb2fa2009-04-10 15:17:50 -0700522 * @bin_attr: struct bin_attribute for this file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 * @buf: buffer to store results
524 * @off: offset into legacy I/O port space
525 * @count: number of bytes to read
526 *
527 * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific
528 * callback routine (pci_legacy_read).
529 */
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000530static ssize_t
Zhang Rui91a69022007-06-09 13:57:22 +0800531pci_read_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr,
532 char *buf, loff_t off, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533{
534 struct pci_bus *bus = to_pci_bus(container_of(kobj,
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -0400535 struct device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 kobj));
537
538 /* Only support 1, 2 or 4 byte accesses */
539 if (count != 1 && count != 2 && count != 4)
540 return -EINVAL;
541
542 return pci_legacy_read(bus, off, (u32 *)buf, count);
543}
544
545/**
546 * pci_write_legacy_io - write byte(s) to legacy I/O port space
547 * @kobj: kobject corresponding to file to read from
Randy Dunlapcffb2fa2009-04-10 15:17:50 -0700548 * @bin_attr: struct bin_attribute for this file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 * @buf: buffer containing value to be written
550 * @off: offset into legacy I/O port space
551 * @count: number of bytes to write
552 *
553 * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific
554 * callback routine (pci_legacy_write).
555 */
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000556static ssize_t
Zhang Rui91a69022007-06-09 13:57:22 +0800557pci_write_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr,
558 char *buf, loff_t off, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559{
560 struct pci_bus *bus = to_pci_bus(container_of(kobj,
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -0400561 struct device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 kobj));
563 /* Only support 1, 2 or 4 byte accesses */
564 if (count != 1 && count != 2 && count != 4)
565 return -EINVAL;
566
567 return pci_legacy_write(bus, off, *(u32 *)buf, count);
568}
569
570/**
571 * pci_mmap_legacy_mem - map legacy PCI memory into user memory space
572 * @kobj: kobject corresponding to device to be mapped
573 * @attr: struct bin_attribute for this file
574 * @vma: struct vm_area_struct passed to mmap
575 *
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000576 * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 * legacy memory space (first meg of bus space) into application virtual
578 * memory space.
579 */
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000580static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581pci_mmap_legacy_mem(struct kobject *kobj, struct bin_attribute *attr,
582 struct vm_area_struct *vma)
583{
584 struct pci_bus *bus = to_pci_bus(container_of(kobj,
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -0400585 struct device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 kobj));
587
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000588 return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem);
589}
590
591/**
592 * pci_mmap_legacy_io - map legacy PCI IO into user memory space
593 * @kobj: kobject corresponding to device to be mapped
594 * @attr: struct bin_attribute for this file
595 * @vma: struct vm_area_struct passed to mmap
596 *
597 * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap
598 * legacy IO space (first meg of bus space) into application virtual
599 * memory space. Returns -ENOSYS if the operation isn't supported
600 */
601static int
602pci_mmap_legacy_io(struct kobject *kobj, struct bin_attribute *attr,
603 struct vm_area_struct *vma)
604{
605 struct pci_bus *bus = to_pci_bus(container_of(kobj,
606 struct device,
607 kobj));
608
609 return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io);
610}
611
612/**
Ivan Kokshaysky10a0ef32009-02-17 13:46:53 +0300613 * pci_adjust_legacy_attr - adjustment of legacy file attributes
614 * @b: bus to create files under
615 * @mmap_type: I/O port or memory
616 *
617 * Stub implementation. Can be overridden by arch if necessary.
618 */
619void __weak
620pci_adjust_legacy_attr(struct pci_bus *b, enum pci_mmap_state mmap_type)
621{
622 return;
623}
624
625/**
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000626 * pci_create_legacy_files - create legacy I/O port and memory files
627 * @b: bus to create files under
628 *
629 * Some platforms allow access to legacy I/O port and ISA memory space on
630 * a per-bus basis. This routine creates the files and ties them into
631 * their associated read, write and mmap files from pci-sysfs.c
632 *
633 * On error unwind, but don't propogate the error to the caller
634 * as it is ok to set up the PCI bus without these files.
635 */
636void pci_create_legacy_files(struct pci_bus *b)
637{
638 int error;
639
640 b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2,
641 GFP_ATOMIC);
642 if (!b->legacy_io)
643 goto kzalloc_err;
644
645 b->legacy_io->attr.name = "legacy_io";
646 b->legacy_io->size = 0xffff;
647 b->legacy_io->attr.mode = S_IRUSR | S_IWUSR;
648 b->legacy_io->read = pci_read_legacy_io;
649 b->legacy_io->write = pci_write_legacy_io;
650 b->legacy_io->mmap = pci_mmap_legacy_io;
Ivan Kokshaysky10a0ef32009-02-17 13:46:53 +0300651 pci_adjust_legacy_attr(b, pci_mmap_io);
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000652 error = device_create_bin_file(&b->dev, b->legacy_io);
653 if (error)
654 goto legacy_io_err;
655
656 /* Allocated above after the legacy_io struct */
657 b->legacy_mem = b->legacy_io + 1;
658 b->legacy_mem->attr.name = "legacy_mem";
659 b->legacy_mem->size = 1024*1024;
660 b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR;
661 b->legacy_mem->mmap = pci_mmap_legacy_mem;
Ivan Kokshaysky10a0ef32009-02-17 13:46:53 +0300662 pci_adjust_legacy_attr(b, pci_mmap_mem);
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000663 error = device_create_bin_file(&b->dev, b->legacy_mem);
664 if (error)
665 goto legacy_mem_err;
666
667 return;
668
669legacy_mem_err:
670 device_remove_bin_file(&b->dev, b->legacy_io);
671legacy_io_err:
672 kfree(b->legacy_io);
673 b->legacy_io = NULL;
674kzalloc_err:
675 printk(KERN_WARNING "pci: warning: could not create legacy I/O port "
676 "and ISA memory resources to sysfs\n");
677 return;
678}
679
680void pci_remove_legacy_files(struct pci_bus *b)
681{
682 if (b->legacy_io) {
683 device_remove_bin_file(&b->dev, b->legacy_io);
684 device_remove_bin_file(&b->dev, b->legacy_mem);
685 kfree(b->legacy_io); /* both are allocated here */
686 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687}
688#endif /* HAVE_PCI_LEGACY */
689
690#ifdef HAVE_PCI_MMAP
Linus Torvaldsb5ff7df2008-10-02 18:52:51 -0700691
Jesse Barnes9eff02e2008-10-24 10:32:33 -0700692int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma)
Linus Torvaldsb5ff7df2008-10-02 18:52:51 -0700693{
694 unsigned long nr, start, size;
695
696 nr = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
697 start = vma->vm_pgoff;
Ed Swierk88e7df02008-11-03 14:41:16 -0800698 size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1;
Linus Torvaldsb5ff7df2008-10-02 18:52:51 -0700699 if (start < size && size - start >= nr)
700 return 1;
701 WARN(1, "process \"%s\" tried to map 0x%08lx-0x%08lx on %s BAR %d (size 0x%08lx)\n",
702 current->comm, start, start+nr, pci_name(pdev), resno, size);
703 return 0;
704}
705
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706/**
707 * pci_mmap_resource - map a PCI resource into user memory space
708 * @kobj: kobject for mapping
709 * @attr: struct bin_attribute for the file being mapped
710 * @vma: struct vm_area_struct passed into the mmap
venkatesh.pallipadi@intel.com45aec1a2008-03-18 17:00:22 -0700711 * @write_combine: 1 for write_combine mapping
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 *
713 * Use the regular PCI mapping routines to map a PCI resource into userspace.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 */
715static int
716pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
venkatesh.pallipadi@intel.com45aec1a2008-03-18 17:00:22 -0700717 struct vm_area_struct *vma, int write_combine)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718{
719 struct pci_dev *pdev = to_pci_dev(container_of(kobj,
720 struct device, kobj));
721 struct resource *res = (struct resource *)attr->private;
722 enum pci_mmap_state mmap_type;
Greg Kroah-Hartmane31dd6e2006-06-12 17:06:02 -0700723 resource_size_t start, end;
Michael Ellerman2311b1f2005-05-13 17:44:10 +1000724 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725
Michael Ellerman2311b1f2005-05-13 17:44:10 +1000726 for (i = 0; i < PCI_ROM_RESOURCE; i++)
727 if (res == &pdev->resource[i])
728 break;
729 if (i >= PCI_ROM_RESOURCE)
730 return -ENODEV;
731
Linus Torvaldsb5ff7df2008-10-02 18:52:51 -0700732 if (!pci_mmap_fits(pdev, i, vma))
733 return -EINVAL;
734
Michael Ellerman2311b1f2005-05-13 17:44:10 +1000735 /* pci_mmap_page_range() expects the same kind of entry as coming
736 * from /proc/bus/pci/ which is a "user visible" value. If this is
737 * different from the resource itself, arch will do necessary fixup.
738 */
739 pci_resource_to_user(pdev, i, res, &start, &end);
740 vma->vm_pgoff += start >> PAGE_SHIFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;
742
Arjan van de Vene8de1482008-10-22 19:55:31 -0700743 if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(start))
744 return -EINVAL;
745
venkatesh.pallipadi@intel.com45aec1a2008-03-18 17:00:22 -0700746 return pci_mmap_page_range(pdev, vma, mmap_type, write_combine);
747}
748
749static int
750pci_mmap_resource_uc(struct kobject *kobj, struct bin_attribute *attr,
751 struct vm_area_struct *vma)
752{
753 return pci_mmap_resource(kobj, attr, vma, 0);
754}
755
756static int
757pci_mmap_resource_wc(struct kobject *kobj, struct bin_attribute *attr,
758 struct vm_area_struct *vma)
759{
760 return pci_mmap_resource(kobj, attr, vma, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761}
762
763/**
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -0700764 * pci_remove_resource_files - cleanup resource files
Randy Dunlapcffb2fa2009-04-10 15:17:50 -0700765 * @pdev: dev to cleanup
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -0700766 *
Randy Dunlapcffb2fa2009-04-10 15:17:50 -0700767 * If we created resource files for @pdev, remove them from sysfs and
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -0700768 * free their resources.
769 */
770static void
771pci_remove_resource_files(struct pci_dev *pdev)
772{
773 int i;
774
775 for (i = 0; i < PCI_ROM_RESOURCE; i++) {
776 struct bin_attribute *res_attr;
777
778 res_attr = pdev->res_attr[i];
779 if (res_attr) {
780 sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
781 kfree(res_attr);
782 }
venkatesh.pallipadi@intel.com45aec1a2008-03-18 17:00:22 -0700783
784 res_attr = pdev->res_attr_wc[i];
785 if (res_attr) {
786 sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
787 kfree(res_attr);
788 }
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -0700789 }
790}
791
venkatesh.pallipadi@intel.com45aec1a2008-03-18 17:00:22 -0700792static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine)
793{
794 /* allocate attribute structure, piggyback attribute name */
795 int name_len = write_combine ? 13 : 10;
796 struct bin_attribute *res_attr;
797 int retval;
798
799 res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC);
800 if (res_attr) {
801 char *res_attr_name = (char *)(res_attr + 1);
802
803 if (write_combine) {
804 pdev->res_attr_wc[num] = res_attr;
805 sprintf(res_attr_name, "resource%d_wc", num);
806 res_attr->mmap = pci_mmap_resource_wc;
807 } else {
808 pdev->res_attr[num] = res_attr;
809 sprintf(res_attr_name, "resource%d", num);
810 res_attr->mmap = pci_mmap_resource_uc;
811 }
812 res_attr->attr.name = res_attr_name;
813 res_attr->attr.mode = S_IRUSR | S_IWUSR;
814 res_attr->size = pci_resource_len(pdev, num);
815 res_attr->private = &pdev->resource[num];
816 retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr);
817 } else
818 retval = -ENOMEM;
819
820 return retval;
821}
822
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -0700823/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 * pci_create_resource_files - create resource files in sysfs for @dev
Randy Dunlapcffb2fa2009-04-10 15:17:50 -0700825 * @pdev: dev in question
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 *
Randy Dunlapcffb2fa2009-04-10 15:17:50 -0700827 * Walk the resources in @pdev creating files for each resource available.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 */
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -0700829static int pci_create_resource_files(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830{
831 int i;
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -0700832 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833
834 /* Expose the PCI resources from this device as files */
835 for (i = 0; i < PCI_ROM_RESOURCE; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836
837 /* skip empty resources */
838 if (!pci_resource_len(pdev, i))
839 continue;
840
venkatesh.pallipadi@intel.com45aec1a2008-03-18 17:00:22 -0700841 retval = pci_create_attr(pdev, i, 0);
842 /* for prefetchable resources, create a WC mappable file */
843 if (!retval && pdev->resource[i].flags & IORESOURCE_PREFETCH)
844 retval = pci_create_attr(pdev, i, 1);
Dmitry Torokhovd48593b2005-04-29 00:58:46 -0500845
venkatesh.pallipadi@intel.com45aec1a2008-03-18 17:00:22 -0700846 if (retval) {
847 pci_remove_resource_files(pdev);
848 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849 }
850 }
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -0700851 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852}
853#else /* !HAVE_PCI_MMAP */
Ivan Kokshaysky10a0ef32009-02-17 13:46:53 +0300854int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; }
855void __weak pci_remove_resource_files(struct pci_dev *dev) { return; }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856#endif /* HAVE_PCI_MMAP */
857
858/**
859 * pci_write_rom - used to enable access to the PCI ROM display
860 * @kobj: kernel object handle
Randy Dunlapcffb2fa2009-04-10 15:17:50 -0700861 * @bin_attr: struct bin_attribute for this file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 * @buf: user input
863 * @off: file offset
864 * @count: number of byte in input
865 *
866 * writing anything except 0 enables it
867 */
868static ssize_t
Zhang Rui91a69022007-06-09 13:57:22 +0800869pci_write_rom(struct kobject *kobj, struct bin_attribute *bin_attr,
870 char *buf, loff_t off, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871{
872 struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
873
874 if ((off == 0) && (*buf == '0') && (count == 2))
875 pdev->rom_attr_enabled = 0;
876 else
877 pdev->rom_attr_enabled = 1;
878
879 return count;
880}
881
882/**
883 * pci_read_rom - read a PCI ROM
884 * @kobj: kernel object handle
Randy Dunlapcffb2fa2009-04-10 15:17:50 -0700885 * @bin_attr: struct bin_attribute for this file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886 * @buf: where to put the data we read from the ROM
887 * @off: file offset
888 * @count: number of bytes to read
889 *
890 * Put @count bytes starting at @off into @buf from the ROM in the PCI
891 * device corresponding to @kobj.
892 */
893static ssize_t
Zhang Rui91a69022007-06-09 13:57:22 +0800894pci_read_rom(struct kobject *kobj, struct bin_attribute *bin_attr,
895 char *buf, loff_t off, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896{
897 struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
898 void __iomem *rom;
899 size_t size;
900
901 if (!pdev->rom_attr_enabled)
902 return -EINVAL;
903
904 rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */
Timothy S. Nelson97c44832009-01-30 06:12:47 +1100905 if (!rom || !size)
906 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907
908 if (off >= size)
909 count = 0;
910 else {
911 if (off + count > size)
912 count = size - off;
913
914 memcpy_fromio(buf, rom + off, count);
915 }
916 pci_unmap_rom(pdev, rom);
917
918 return count;
919}
920
921static struct bin_attribute pci_config_attr = {
922 .attr = {
923 .name = "config",
924 .mode = S_IRUGO | S_IWUSR,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925 },
Zhao, Yu557848c2008-10-13 19:18:07 +0800926 .size = PCI_CFG_SPACE_SIZE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927 .read = pci_read_config,
928 .write = pci_write_config,
929};
930
931static struct bin_attribute pcie_config_attr = {
932 .attr = {
933 .name = "config",
934 .mode = S_IRUGO | S_IWUSR,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935 },
Zhao, Yu557848c2008-10-13 19:18:07 +0800936 .size = PCI_CFG_SPACE_EXP_SIZE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 .read = pci_read_config,
938 .write = pci_write_config,
939};
940
Michael Ellermana2cd52c2007-05-08 12:03:08 +1000941int __attribute__ ((weak)) pcibios_add_platform_entries(struct pci_dev *dev)
Michael Ellerman575e3342007-05-08 12:03:07 +1000942{
Michael Ellermana2cd52c2007-05-08 12:03:08 +1000943 return 0;
Michael Ellerman575e3342007-05-08 12:03:07 +1000944}
945
Michael S. Tsirkin711d5772009-07-27 23:37:48 +0300946static ssize_t reset_store(struct device *dev,
947 struct device_attribute *attr, const char *buf,
948 size_t count)
949{
950 struct pci_dev *pdev = to_pci_dev(dev);
951 unsigned long val;
952 ssize_t result = strict_strtoul(buf, 0, &val);
953
954 if (result < 0)
955 return result;
956
957 if (val != 1)
958 return -EINVAL;
959 return pci_reset_function(pdev);
960}
961
962static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store);
963
Zhao, Yu280c73d2008-10-13 20:01:00 +0800964static int pci_create_capabilities_sysfs(struct pci_dev *dev)
965{
966 int retval;
967 struct bin_attribute *attr;
968
969 /* If the device has VPD, try to expose it in sysfs. */
970 if (dev->vpd) {
971 attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
972 if (!attr)
973 return -ENOMEM;
974
975 attr->size = dev->vpd->len;
976 attr->attr.name = "vpd";
977 attr->attr.mode = S_IRUSR | S_IWUSR;
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800978 attr->read = read_vpd_attr;
979 attr->write = write_vpd_attr;
Zhao, Yu280c73d2008-10-13 20:01:00 +0800980 retval = sysfs_create_bin_file(&dev->dev.kobj, attr);
981 if (retval) {
982 kfree(dev->vpd->attr);
983 return retval;
984 }
985 dev->vpd->attr = attr;
986 }
987
988 /* Active State Power Management */
989 pcie_aspm_create_sysfs_dev_files(dev);
990
Michael S. Tsirkin711d5772009-07-27 23:37:48 +0300991 if (!pci_probe_reset_function(dev)) {
992 retval = device_create_file(&dev->dev, &reset_attr);
993 if (retval)
994 goto error;
995 dev->reset_fn = 1;
996 }
Zhao, Yu280c73d2008-10-13 20:01:00 +0800997 return 0;
Michael S. Tsirkin711d5772009-07-27 23:37:48 +0300998
999error:
1000 pcie_aspm_remove_sysfs_dev_files(dev);
1001 if (dev->vpd && dev->vpd->attr) {
1002 sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
1003 kfree(dev->vpd->attr);
1004 }
1005
1006 return retval;
Zhao, Yu280c73d2008-10-13 20:01:00 +08001007}
1008
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001009int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010{
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001011 int retval;
Zhao, Yu280c73d2008-10-13 20:01:00 +08001012 int rom_size = 0;
1013 struct bin_attribute *attr;
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001014
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015 if (!sysfs_initialized)
1016 return -EACCES;
1017
Zhao, Yu557848c2008-10-13 19:18:07 +08001018 if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001019 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020 else
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001021 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr);
1022 if (retval)
1023 goto err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001025 retval = pci_create_resource_files(pdev);
1026 if (retval)
Zhao, Yu280c73d2008-10-13 20:01:00 +08001027 goto err_config_file;
1028
1029 if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
1030 rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
1031 else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)
1032 rom_size = 0x20000;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033
1034 /* If the device has a ROM, try to expose it in sysfs. */
Zhao, Yu280c73d2008-10-13 20:01:00 +08001035 if (rom_size) {
Ben Hutchings94e61082008-03-05 16:52:39 +00001036 attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
Zhao, Yu280c73d2008-10-13 20:01:00 +08001037 if (!attr) {
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001038 retval = -ENOMEM;
Michael Ellerman9890b122007-04-18 13:34:12 +10001039 goto err_resource_files;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 }
Zhao, Yu280c73d2008-10-13 20:01:00 +08001041 attr->size = rom_size;
1042 attr->attr.name = "rom";
1043 attr->attr.mode = S_IRUSR;
1044 attr->read = pci_read_rom;
1045 attr->write = pci_write_rom;
1046 retval = sysfs_create_bin_file(&pdev->dev.kobj, attr);
1047 if (retval) {
1048 kfree(attr);
1049 goto err_resource_files;
1050 }
1051 pdev->rom_attr = attr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 }
Zhao, Yu280c73d2008-10-13 20:01:00 +08001053
Dave Airlie217f45d2009-03-04 05:57:05 +00001054 if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) {
1055 retval = device_create_file(&pdev->dev, &vga_attr);
1056 if (retval)
1057 goto err_rom_file;
1058 }
1059
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060 /* add platform-specific attributes */
Zhao, Yu280c73d2008-10-13 20:01:00 +08001061 retval = pcibios_add_platform_entries(pdev);
1062 if (retval)
Dave Airlie217f45d2009-03-04 05:57:05 +00001063 goto err_vga_file;
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001064
Zhao, Yu280c73d2008-10-13 20:01:00 +08001065 /* add sysfs entries for various capabilities */
1066 retval = pci_create_capabilities_sysfs(pdev);
1067 if (retval)
Dave Airlie217f45d2009-03-04 05:57:05 +00001068 goto err_vga_file;
Shaohua Li7d715a62008-02-25 09:46:41 +08001069
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 return 0;
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001071
Dave Airlie217f45d2009-03-04 05:57:05 +00001072err_vga_file:
1073 if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA)
1074 device_remove_file(&pdev->dev, &vga_attr);
Michael Ellermana2cd52c2007-05-08 12:03:08 +10001075err_rom_file:
Zhao, Yu280c73d2008-10-13 20:01:00 +08001076 if (rom_size) {
Ben Hutchings94e61082008-03-05 16:52:39 +00001077 sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
Zhao, Yu280c73d2008-10-13 20:01:00 +08001078 kfree(pdev->rom_attr);
1079 pdev->rom_attr = NULL;
1080 }
Michael Ellerman9890b122007-04-18 13:34:12 +10001081err_resource_files:
1082 pci_remove_resource_files(pdev);
Ben Hutchings94e61082008-03-05 16:52:39 +00001083err_config_file:
Zhao, Yu557848c2008-10-13 19:18:07 +08001084 if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001085 sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
1086 else
1087 sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
1088err:
1089 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090}
1091
Zhao, Yu280c73d2008-10-13 20:01:00 +08001092static void pci_remove_capabilities_sysfs(struct pci_dev *dev)
1093{
1094 if (dev->vpd && dev->vpd->attr) {
1095 sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
1096 kfree(dev->vpd->attr);
1097 }
1098
1099 pcie_aspm_remove_sysfs_dev_files(dev);
Michael S. Tsirkin711d5772009-07-27 23:37:48 +03001100 if (dev->reset_fn) {
1101 device_remove_file(&dev->dev, &reset_attr);
1102 dev->reset_fn = 0;
1103 }
Zhao, Yu280c73d2008-10-13 20:01:00 +08001104}
1105
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106/**
1107 * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files
1108 * @pdev: device whose entries we should free
1109 *
1110 * Cleanup when @pdev is removed from sysfs.
1111 */
1112void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
1113{
Zhao, Yu280c73d2008-10-13 20:01:00 +08001114 int rom_size = 0;
1115
David Millerd67afe52006-11-10 12:27:48 -08001116 if (!sysfs_initialized)
1117 return;
1118
Zhao, Yu280c73d2008-10-13 20:01:00 +08001119 pci_remove_capabilities_sysfs(pdev);
Shaohua Li7d715a62008-02-25 09:46:41 +08001120
Zhao, Yu557848c2008-10-13 19:18:07 +08001121 if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122 sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
1123 else
1124 sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
1125
1126 pci_remove_resource_files(pdev);
1127
Zhao, Yu280c73d2008-10-13 20:01:00 +08001128 if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
1129 rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
1130 else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)
1131 rom_size = 0x20000;
1132
1133 if (rom_size && pdev->rom_attr) {
1134 sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
1135 kfree(pdev->rom_attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136 }
1137}
1138
1139static int __init pci_sysfs_init(void)
1140{
1141 struct pci_dev *pdev = NULL;
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001142 int retval;
1143
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 sysfs_initialized = 1;
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001145 for_each_pci_dev(pdev) {
1146 retval = pci_create_sysfs_dev_files(pdev);
Julia Lawall151fc5d2007-11-20 08:41:16 +01001147 if (retval) {
1148 pci_dev_put(pdev);
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001149 return retval;
Julia Lawall151fc5d2007-11-20 08:41:16 +01001150 }
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -07001151 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152
1153 return 0;
1154}
1155
Jesse Barnes40ee9e92007-03-24 11:03:32 -07001156late_initcall(pci_sysfs_init);