1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18#include <linux/kernel.h>
19#include <linux/sched.h>
20#include <linux/pci.h>
21#include <linux/stat.h>
22#include <linux/export.h>
23#include <linux/topology.h>
24#include <linux/mm.h>
25#include <linux/fs.h>
26#include <linux/capability.h>
27#include <linux/security.h>
28#include <linux/pci-aspm.h>
29#include <linux/slab.h>
30#include <linux/vgaarb.h>
31#include <linux/pm_runtime.h>
32#include <linux/of.h>
33#include "pci.h"
34
35static int sysfs_initialized;
36
37
38#define pci_config_attr(field, format_string) \
39static ssize_t \
40field##_show(struct device *dev, struct device_attribute *attr, char *buf) \
41{ \
42 struct pci_dev *pdev; \
43 \
44 pdev = to_pci_dev(dev); \
45 return sprintf(buf, format_string, pdev->field); \
46} \
47static DEVICE_ATTR_RO(field)
48
49pci_config_attr(vendor, "0x%04x\n");
50pci_config_attr(device, "0x%04x\n");
51pci_config_attr(subsystem_vendor, "0x%04x\n");
52pci_config_attr(subsystem_device, "0x%04x\n");
53pci_config_attr(revision, "0x%02x\n");
54pci_config_attr(class, "0x%06x\n");
55pci_config_attr(irq, "%u\n");
56
57static ssize_t broken_parity_status_show(struct device *dev,
58 struct device_attribute *attr,
59 char *buf)
60{
61 struct pci_dev *pdev = to_pci_dev(dev);
62 return sprintf(buf, "%u\n", pdev->broken_parity_status);
63}
64
65static ssize_t broken_parity_status_store(struct device *dev,
66 struct device_attribute *attr,
67 const char *buf, size_t count)
68{
69 struct pci_dev *pdev = to_pci_dev(dev);
70 unsigned long val;
71
72 if (kstrtoul(buf, 0, &val) < 0)
73 return -EINVAL;
74
75 pdev->broken_parity_status = !!val;
76
77 return count;
78}
79static DEVICE_ATTR_RW(broken_parity_status);
80
81static ssize_t pci_dev_show_local_cpu(struct device *dev, bool list,
82 struct device_attribute *attr, char *buf)
83{
84 const struct cpumask *mask;
85
86#ifdef CONFIG_NUMA
87 mask = (dev_to_node(dev) == -1) ? cpu_online_mask :
88 cpumask_of_node(dev_to_node(dev));
89#else
90 mask = cpumask_of_pcibus(to_pci_dev(dev)->bus);
91#endif
92 return cpumap_print_to_pagebuf(list, buf, mask);
93}
94
95static ssize_t local_cpus_show(struct device *dev,
96 struct device_attribute *attr, char *buf)
97{
98 return pci_dev_show_local_cpu(dev, false, attr, buf);
99}
100static DEVICE_ATTR_RO(local_cpus);
101
102static ssize_t local_cpulist_show(struct device *dev,
103 struct device_attribute *attr, char *buf)
104{
105 return pci_dev_show_local_cpu(dev, true, attr, buf);
106}
107static DEVICE_ATTR_RO(local_cpulist);
108
109
110
111
112static ssize_t cpuaffinity_show(struct device *dev,
113 struct device_attribute *attr, char *buf)
114{
115 const struct cpumask *cpumask = cpumask_of_pcibus(to_pci_bus(dev));
116
117 return cpumap_print_to_pagebuf(false, buf, cpumask);
118}
119static DEVICE_ATTR_RO(cpuaffinity);
120
121static ssize_t cpulistaffinity_show(struct device *dev,
122 struct device_attribute *attr, char *buf)
123{
124 const struct cpumask *cpumask = cpumask_of_pcibus(to_pci_bus(dev));
125
126 return cpumap_print_to_pagebuf(true, buf, cpumask);
127}
128static DEVICE_ATTR_RO(cpulistaffinity);
129
130
131static ssize_t resource_show(struct device *dev, struct device_attribute *attr,
132 char *buf)
133{
134 struct pci_dev *pci_dev = to_pci_dev(dev);
135 char *str = buf;
136 int i;
137 int max;
138 resource_size_t start, end;
139
140 if (pci_dev->subordinate)
141 max = DEVICE_COUNT_RESOURCE;
142 else
143 max = PCI_BRIDGE_RESOURCES;
144
145 for (i = 0; i < max; i++) {
146 struct resource *res = &pci_dev->resource[i];
147 pci_resource_to_user(pci_dev, i, res, &start, &end);
148 str += sprintf(str, "0x%016llx 0x%016llx 0x%016llx\n",
149 (unsigned long long)start,
150 (unsigned long long)end,
151 (unsigned long long)res->flags);
152 }
153 return (str - buf);
154}
155static DEVICE_ATTR_RO(resource);
156
157static ssize_t max_link_speed_show(struct device *dev,
158 struct device_attribute *attr, char *buf)
159{
160 struct pci_dev *pci_dev = to_pci_dev(dev);
161 u32 linkcap;
162 int err;
163 const char *speed;
164
165 err = pcie_capability_read_dword(pci_dev, PCI_EXP_LNKCAP, &linkcap);
166 if (err)
167 return -EINVAL;
168
169 switch (linkcap & PCI_EXP_LNKCAP_SLS) {
170 case PCI_EXP_LNKCAP_SLS_8_0GB:
171 speed = "8 GT/s";
172 break;
173 case PCI_EXP_LNKCAP_SLS_5_0GB:
174 speed = "5 GT/s";
175 break;
176 case PCI_EXP_LNKCAP_SLS_2_5GB:
177 speed = "2.5 GT/s";
178 break;
179 default:
180 speed = "Unknown speed";
181 }
182
183 return sprintf(buf, "%s\n", speed);
184}
185static DEVICE_ATTR_RO(max_link_speed);
186
187static ssize_t max_link_width_show(struct device *dev,
188 struct device_attribute *attr, char *buf)
189{
190 struct pci_dev *pci_dev = to_pci_dev(dev);
191 u32 linkcap;
192 int err;
193
194 err = pcie_capability_read_dword(pci_dev, PCI_EXP_LNKCAP, &linkcap);
195 if (err)
196 return -EINVAL;
197
198 return sprintf(buf, "%u\n", (linkcap & PCI_EXP_LNKCAP_MLW) >> 4);
199}
200static DEVICE_ATTR_RO(max_link_width);
201
202static ssize_t current_link_speed_show(struct device *dev,
203 struct device_attribute *attr, char *buf)
204{
205 struct pci_dev *pci_dev = to_pci_dev(dev);
206 u16 linkstat;
207 int err;
208 const char *speed;
209
210 err = pcie_capability_read_word(pci_dev, PCI_EXP_LNKSTA, &linkstat);
211 if (err)
212 return -EINVAL;
213
214 switch (linkstat & PCI_EXP_LNKSTA_CLS) {
215 case PCI_EXP_LNKSTA_CLS_8_0GB:
216 speed = "8 GT/s";
217 break;
218 case PCI_EXP_LNKSTA_CLS_5_0GB:
219 speed = "5 GT/s";
220 break;
221 case PCI_EXP_LNKSTA_CLS_2_5GB:
222 speed = "2.5 GT/s";
223 break;
224 default:
225 speed = "Unknown speed";
226 }
227
228 return sprintf(buf, "%s\n", speed);
229}
230static DEVICE_ATTR_RO(current_link_speed);
231
232static ssize_t current_link_width_show(struct device *dev,
233 struct device_attribute *attr, char *buf)
234{
235 struct pci_dev *pci_dev = to_pci_dev(dev);
236 u16 linkstat;
237 int err;
238
239 err = pcie_capability_read_word(pci_dev, PCI_EXP_LNKSTA, &linkstat);
240 if (err)
241 return -EINVAL;
242
243 return sprintf(buf, "%u\n",
244 (linkstat & PCI_EXP_LNKSTA_NLW) >> PCI_EXP_LNKSTA_NLW_SHIFT);
245}
246static DEVICE_ATTR_RO(current_link_width);
247
248static ssize_t secondary_bus_number_show(struct device *dev,
249 struct device_attribute *attr,
250 char *buf)
251{
252 struct pci_dev *pci_dev = to_pci_dev(dev);
253 u8 sec_bus;
254 int err;
255
256 err = pci_read_config_byte(pci_dev, PCI_SECONDARY_BUS, &sec_bus);
257 if (err)
258 return -EINVAL;
259
260 return sprintf(buf, "%u\n", sec_bus);
261}
262static DEVICE_ATTR_RO(secondary_bus_number);
263
264static ssize_t subordinate_bus_number_show(struct device *dev,
265 struct device_attribute *attr,
266 char *buf)
267{
268 struct pci_dev *pci_dev = to_pci_dev(dev);
269 u8 sub_bus;
270 int err;
271
272 err = pci_read_config_byte(pci_dev, PCI_SUBORDINATE_BUS, &sub_bus);
273 if (err)
274 return -EINVAL;
275
276 return sprintf(buf, "%u\n", sub_bus);
277}
278static DEVICE_ATTR_RO(subordinate_bus_number);
279
280static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
281 char *buf)
282{
283 struct pci_dev *pci_dev = to_pci_dev(dev);
284
285 return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02X\n",
286 pci_dev->vendor, pci_dev->device,
287 pci_dev->subsystem_vendor, pci_dev->subsystem_device,
288 (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8),
289 (u8)(pci_dev->class));
290}
291static DEVICE_ATTR_RO(modalias);
292
293static ssize_t enable_store(struct device *dev, struct device_attribute *attr,
294 const char *buf, size_t count)
295{
296 struct pci_dev *pdev = to_pci_dev(dev);
297 unsigned long val;
298 ssize_t result = kstrtoul(buf, 0, &val);
299
300 if (result < 0)
301 return result;
302
303
304 if (!capable(CAP_SYS_ADMIN))
305 return -EPERM;
306
307 if (!val) {
308 if (pci_is_enabled(pdev))
309 pci_disable_device(pdev);
310 else
311 result = -EIO;
312 } else
313 result = pci_enable_device(pdev);
314
315 return result < 0 ? result : count;
316}
317
318static ssize_t enable_show(struct device *dev, struct device_attribute *attr,
319 char *buf)
320{
321 struct pci_dev *pdev;
322
323 pdev = to_pci_dev(dev);
324 return sprintf(buf, "%u\n", atomic_read(&pdev->enable_cnt));
325}
326static DEVICE_ATTR_RW(enable);
327
328#ifdef CONFIG_NUMA
329static ssize_t numa_node_store(struct device *dev,
330 struct device_attribute *attr, const char *buf,
331 size_t count)
332{
333 struct pci_dev *pdev = to_pci_dev(dev);
334 int node, ret;
335
336 if (!capable(CAP_SYS_ADMIN))
337 return -EPERM;
338
339 ret = kstrtoint(buf, 0, &node);
340 if (ret)
341 return ret;
342
343 if ((node < 0 && node != NUMA_NO_NODE) || node >= MAX_NUMNODES)
344 return -EINVAL;
345
346 if (node != NUMA_NO_NODE && !node_online(node))
347 return -EINVAL;
348
349 add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);
350 dev_alert(&pdev->dev, FW_BUG "Overriding NUMA node to %d. Contact your vendor for updates.",
351 node);
352
353 dev->numa_node = node;
354 return count;
355}
356
357static ssize_t numa_node_show(struct device *dev, struct device_attribute *attr,
358 char *buf)
359{
360 return sprintf(buf, "%d\n", dev->numa_node);
361}
362static DEVICE_ATTR_RW(numa_node);
363#endif
364
365static ssize_t dma_mask_bits_show(struct device *dev,
366 struct device_attribute *attr, char *buf)
367{
368 struct pci_dev *pdev = to_pci_dev(dev);
369
370 return sprintf(buf, "%d\n", fls64(pdev->dma_mask));
371}
372static DEVICE_ATTR_RO(dma_mask_bits);
373
374static ssize_t consistent_dma_mask_bits_show(struct device *dev,
375 struct device_attribute *attr,
376 char *buf)
377{
378 return sprintf(buf, "%d\n", fls64(dev->coherent_dma_mask));
379}
380static DEVICE_ATTR_RO(consistent_dma_mask_bits);
381
382static ssize_t msi_bus_show(struct device *dev, struct device_attribute *attr,
383 char *buf)
384{
385 struct pci_dev *pdev = to_pci_dev(dev);
386 struct pci_bus *subordinate = pdev->subordinate;
387
388 return sprintf(buf, "%u\n", subordinate ?
389 !(subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI)
390 : !pdev->no_msi);
391}
392
393static ssize_t msi_bus_store(struct device *dev, struct device_attribute *attr,
394 const char *buf, size_t count)
395{
396 struct pci_dev *pdev = to_pci_dev(dev);
397 struct pci_bus *subordinate = pdev->subordinate;
398 unsigned long val;
399
400 if (kstrtoul(buf, 0, &val) < 0)
401 return -EINVAL;
402
403 if (!capable(CAP_SYS_ADMIN))
404 return -EPERM;
405
406
407
408
409
410
411 if (!subordinate) {
412 pdev->no_msi = !val;
413 dev_info(&pdev->dev, "MSI/MSI-X %s for future drivers\n",
414 val ? "allowed" : "disallowed");
415 return count;
416 }
417
418 if (val)
419 subordinate->bus_flags &= ~PCI_BUS_FLAGS_NO_MSI;
420 else
421 subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
422
423 dev_info(&subordinate->dev, "MSI/MSI-X %s for future drivers of devices on this bus\n",
424 val ? "allowed" : "disallowed");
425 return count;
426}
427static DEVICE_ATTR_RW(msi_bus);
428
429static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf,
430 size_t count)
431{
432 unsigned long val;
433 struct pci_bus *b = NULL;
434
435 if (kstrtoul(buf, 0, &val) < 0)
436 return -EINVAL;
437
438 if (val) {
439 pci_lock_rescan_remove();
440 while ((b = pci_find_next_bus(b)) != NULL)
441 pci_rescan_bus(b);
442 pci_unlock_rescan_remove();
443 }
444 return count;
445}
446static BUS_ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store);
447
448static struct attribute *pci_bus_attrs[] = {
449 &bus_attr_rescan.attr,
450 NULL,
451};
452
453static const struct attribute_group pci_bus_group = {
454 .attrs = pci_bus_attrs,
455};
456
457const struct attribute_group *pci_bus_groups[] = {
458 &pci_bus_group,
459 NULL,
460};
461
462static ssize_t dev_rescan_store(struct device *dev,
463 struct device_attribute *attr, const char *buf,
464 size_t count)
465{
466 unsigned long val;
467 struct pci_dev *pdev = to_pci_dev(dev);
468
469 if (kstrtoul(buf, 0, &val) < 0)
470 return -EINVAL;
471
472 if (val) {
473 pci_lock_rescan_remove();
474 pci_rescan_bus(pdev->bus);
475 pci_unlock_rescan_remove();
476 }
477 return count;
478}
479static struct device_attribute dev_rescan_attr = __ATTR(rescan,
480 (S_IWUSR|S_IWGRP),
481 NULL, dev_rescan_store);
482
483static ssize_t remove_store(struct device *dev, struct device_attribute *attr,
484 const char *buf, size_t count)
485{
486 unsigned long val;
487
488 if (kstrtoul(buf, 0, &val) < 0)
489 return -EINVAL;
490
491 if (val && device_remove_file_self(dev, attr))
492 pci_stop_and_remove_bus_device_locked(to_pci_dev(dev));
493 return count;
494}
495static struct device_attribute dev_remove_attr = __ATTR(remove,
496 (S_IWUSR|S_IWGRP),
497 NULL, remove_store);
498
499static ssize_t dev_bus_rescan_store(struct device *dev,
500 struct device_attribute *attr,
501 const char *buf, size_t count)
502{
503 unsigned long val;
504 struct pci_bus *bus = to_pci_bus(dev);
505
506 if (kstrtoul(buf, 0, &val) < 0)
507 return -EINVAL;
508
509 if (val) {
510 pci_lock_rescan_remove();
511 if (!pci_is_root_bus(bus) && list_empty(&bus->devices))
512 pci_rescan_bus_bridge_resize(bus->self);
513 else
514 pci_rescan_bus(bus);
515 pci_unlock_rescan_remove();
516 }
517 return count;
518}
519static DEVICE_ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store);
520
521#if defined(CONFIG_PM) && defined(CONFIG_ACPI)
522static ssize_t d3cold_allowed_store(struct device *dev,
523 struct device_attribute *attr,
524 const char *buf, size_t count)
525{
526 struct pci_dev *pdev = to_pci_dev(dev);
527 unsigned long val;
528
529 if (kstrtoul(buf, 0, &val) < 0)
530 return -EINVAL;
531
532 pdev->d3cold_allowed = !!val;
533 if (pdev->d3cold_allowed)
534 pci_d3cold_enable(pdev);
535 else
536 pci_d3cold_disable(pdev);
537
538 pm_runtime_resume(dev);
539
540 return count;
541}
542
543static ssize_t d3cold_allowed_show(struct device *dev,
544 struct device_attribute *attr, char *buf)
545{
546 struct pci_dev *pdev = to_pci_dev(dev);
547 return sprintf(buf, "%u\n", pdev->d3cold_allowed);
548}
549static DEVICE_ATTR_RW(d3cold_allowed);
550#endif
551
552#ifdef CONFIG_OF
553static ssize_t devspec_show(struct device *dev,
554 struct device_attribute *attr, char *buf)
555{
556 struct pci_dev *pdev = to_pci_dev(dev);
557 struct device_node *np = pci_device_to_OF_node(pdev);
558
559 if (np == NULL || np->full_name == NULL)
560 return 0;
561 return sprintf(buf, "%s", np->full_name);
562}
563static DEVICE_ATTR_RO(devspec);
564#endif
565
566#ifdef CONFIG_PCI_IOV
567static ssize_t sriov_totalvfs_show(struct device *dev,
568 struct device_attribute *attr,
569 char *buf)
570{
571 struct pci_dev *pdev = to_pci_dev(dev);
572
573 return sprintf(buf, "%u\n", pci_sriov_get_totalvfs(pdev));
574}
575
576
577static ssize_t sriov_numvfs_show(struct device *dev,
578 struct device_attribute *attr,
579 char *buf)
580{
581 struct pci_dev *pdev = to_pci_dev(dev);
582
583 return sprintf(buf, "%u\n", pdev->sriov->num_VFs);
584}
585
586
587
588
589
590
591
592
593static ssize_t sriov_numvfs_store(struct device *dev,
594 struct device_attribute *attr,
595 const char *buf, size_t count)
596{
597 struct pci_dev *pdev = to_pci_dev(dev);
598 int ret;
599 u16 num_vfs;
600
601 ret = kstrtou16(buf, 0, &num_vfs);
602 if (ret < 0)
603 return ret;
604
605 if (num_vfs > pci_sriov_get_totalvfs(pdev))
606 return -ERANGE;
607
608 device_lock(&pdev->dev);
609
610 if (num_vfs == pdev->sriov->num_VFs)
611 goto exit;
612
613
614 if (!pdev->driver || !pdev->driver->sriov_configure) {
615 dev_info(&pdev->dev, "Driver doesn't support SRIOV configuration via sysfs\n");
616 ret = -ENOENT;
617 goto exit;
618 }
619
620 if (num_vfs == 0) {
621
622 ret = pdev->driver->sriov_configure(pdev, 0);
623 goto exit;
624 }
625
626
627 if (pdev->sriov->num_VFs) {
628 dev_warn(&pdev->dev, "%d VFs already enabled. Disable before enabling %d VFs\n",
629 pdev->sriov->num_VFs, num_vfs);
630 ret = -EBUSY;
631 goto exit;
632 }
633
634 ret = pdev->driver->sriov_configure(pdev, num_vfs);
635 if (ret < 0)
636 goto exit;
637
638 if (ret != num_vfs)
639 dev_warn(&pdev->dev, "%d VFs requested; only %d enabled\n",
640 num_vfs, ret);
641
642exit:
643 device_unlock(&pdev->dev);
644
645 if (ret < 0)
646 return ret;
647
648 return count;
649}
650
651static ssize_t sriov_drivers_autoprobe_show(struct device *dev,
652 struct device_attribute *attr,
653 char *buf)
654{
655 struct pci_dev *pdev = to_pci_dev(dev);
656
657 return sprintf(buf, "%u\n", pdev->sriov->drivers_autoprobe);
658}
659
660static ssize_t sriov_drivers_autoprobe_store(struct device *dev,
661 struct device_attribute *attr,
662 const char *buf, size_t count)
663{
664 struct pci_dev *pdev = to_pci_dev(dev);
665 bool drivers_autoprobe;
666
667 if (kstrtobool(buf, &drivers_autoprobe) < 0)
668 return -EINVAL;
669
670 pdev->sriov->drivers_autoprobe = drivers_autoprobe;
671
672 return count;
673}
674
675static struct device_attribute sriov_totalvfs_attr = __ATTR_RO(sriov_totalvfs);
676static struct device_attribute sriov_numvfs_attr =
677 __ATTR(sriov_numvfs, (S_IRUGO|S_IWUSR|S_IWGRP),
678 sriov_numvfs_show, sriov_numvfs_store);
679static struct device_attribute sriov_drivers_autoprobe_attr =
680 __ATTR(sriov_drivers_autoprobe, (S_IRUGO|S_IWUSR|S_IWGRP),
681 sriov_drivers_autoprobe_show, sriov_drivers_autoprobe_store);
682#endif
683
684static ssize_t driver_override_store(struct device *dev,
685 struct device_attribute *attr,
686 const char *buf, size_t count)
687{
688 struct pci_dev *pdev = to_pci_dev(dev);
689 char *driver_override, *old = pdev->driver_override, *cp;
690
691
692 if (count >= (PAGE_SIZE - 1))
693 return -EINVAL;
694
695 driver_override = kstrndup(buf, count, GFP_KERNEL);
696 if (!driver_override)
697 return -ENOMEM;
698
699 cp = strchr(driver_override, '\n');
700 if (cp)
701 *cp = '\0';
702
703 if (strlen(driver_override)) {
704 pdev->driver_override = driver_override;
705 } else {
706 kfree(driver_override);
707 pdev->driver_override = NULL;
708 }
709
710 kfree(old);
711
712 return count;
713}
714
715static ssize_t driver_override_show(struct device *dev,
716 struct device_attribute *attr, char *buf)
717{
718 struct pci_dev *pdev = to_pci_dev(dev);
719
720 return snprintf(buf, PAGE_SIZE, "%s\n", pdev->driver_override);
721}
722static DEVICE_ATTR_RW(driver_override);
723
724static struct attribute *pci_dev_attrs[] = {
725 &dev_attr_resource.attr,
726 &dev_attr_vendor.attr,
727 &dev_attr_device.attr,
728 &dev_attr_subsystem_vendor.attr,
729 &dev_attr_subsystem_device.attr,
730 &dev_attr_revision.attr,
731 &dev_attr_class.attr,
732 &dev_attr_irq.attr,
733 &dev_attr_local_cpus.attr,
734 &dev_attr_local_cpulist.attr,
735 &dev_attr_modalias.attr,
736#ifdef CONFIG_NUMA
737 &dev_attr_numa_node.attr,
738#endif
739 &dev_attr_dma_mask_bits.attr,
740 &dev_attr_consistent_dma_mask_bits.attr,
741 &dev_attr_enable.attr,
742 &dev_attr_broken_parity_status.attr,
743 &dev_attr_msi_bus.attr,
744#if defined(CONFIG_PM) && defined(CONFIG_ACPI)
745 &dev_attr_d3cold_allowed.attr,
746#endif
747#ifdef CONFIG_OF
748 &dev_attr_devspec.attr,
749#endif
750 &dev_attr_driver_override.attr,
751 NULL,
752};
753
754static struct attribute *pci_bridge_attrs[] = {
755 &dev_attr_subordinate_bus_number.attr,
756 &dev_attr_secondary_bus_number.attr,
757 NULL,
758};
759
760static struct attribute *pcie_dev_attrs[] = {
761 &dev_attr_current_link_speed.attr,
762 &dev_attr_current_link_width.attr,
763 &dev_attr_max_link_width.attr,
764 &dev_attr_max_link_speed.attr,
765 NULL,
766};
767
768static struct attribute *pcibus_attrs[] = {
769 &dev_attr_rescan.attr,
770 &dev_attr_cpuaffinity.attr,
771 &dev_attr_cpulistaffinity.attr,
772 NULL,
773};
774
775static const struct attribute_group pcibus_group = {
776 .attrs = pcibus_attrs,
777};
778
779const struct attribute_group *pcibus_groups[] = {
780 &pcibus_group,
781 NULL,
782};
783
784static ssize_t boot_vga_show(struct device *dev, struct device_attribute *attr,
785 char *buf)
786{
787 struct pci_dev *pdev = to_pci_dev(dev);
788 struct pci_dev *vga_dev = vga_default_device();
789
790 if (vga_dev)
791 return sprintf(buf, "%u\n", (pdev == vga_dev));
792
793 return sprintf(buf, "%u\n",
794 !!(pdev->resource[PCI_ROM_RESOURCE].flags &
795 IORESOURCE_ROM_SHADOW));
796}
797static struct device_attribute vga_attr = __ATTR_RO(boot_vga);
798
799static ssize_t pci_read_config(struct file *filp, struct kobject *kobj,
800 struct bin_attribute *bin_attr, char *buf,
801 loff_t off, size_t count)
802{
803 struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj));
804 unsigned int size = 64;
805 loff_t init_off = off;
806 u8 *data = (u8 *) buf;
807
808
809 if (file_ns_capable(filp, &init_user_ns, CAP_SYS_ADMIN))
810 size = dev->cfg_size;
811 else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
812 size = 128;
813
814 if (off > size)
815 return 0;
816 if (off + count > size) {
817 size -= off;
818 count = size;
819 } else {
820 size = count;
821 }
822
823 pci_config_pm_runtime_get(dev);
824
825 if ((off & 1) && size) {
826 u8 val;
827 pci_user_read_config_byte(dev, off, &val);
828 data[off - init_off] = val;
829 off++;
830 size--;
831 }
832
833 if ((off & 3) && size > 2) {
834 u16 val;
835 pci_user_read_config_word(dev, off, &val);
836 data[off - init_off] = val & 0xff;
837 data[off - init_off + 1] = (val >> 8) & 0xff;
838 off += 2;
839 size -= 2;
840 }
841
842 while (size > 3) {
843 u32 val;
844 pci_user_read_config_dword(dev, off, &val);
845 data[off - init_off] = val & 0xff;
846 data[off - init_off + 1] = (val >> 8) & 0xff;
847 data[off - init_off + 2] = (val >> 16) & 0xff;
848 data[off - init_off + 3] = (val >> 24) & 0xff;
849 off += 4;
850 size -= 4;
851 }
852
853 if (size >= 2) {
854 u16 val;
855 pci_user_read_config_word(dev, off, &val);
856 data[off - init_off] = val & 0xff;
857 data[off - init_off + 1] = (val >> 8) & 0xff;
858 off += 2;
859 size -= 2;
860 }
861
862 if (size > 0) {
863 u8 val;
864 pci_user_read_config_byte(dev, off, &val);
865 data[off - init_off] = val;
866 off++;
867 --size;
868 }
869
870 pci_config_pm_runtime_put(dev);
871
872 return count;
873}
874
875static ssize_t pci_write_config(struct file *filp, struct kobject *kobj,
876 struct bin_attribute *bin_attr, char *buf,
877 loff_t off, size_t count)
878{
879 struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj));
880 unsigned int size = count;
881 loff_t init_off = off;
882 u8 *data = (u8 *) buf;
883
884 if (off > dev->cfg_size)
885 return 0;
886 if (off + count > dev->cfg_size) {
887 size = dev->cfg_size - off;
888 count = size;
889 }
890
891 pci_config_pm_runtime_get(dev);
892
893 if ((off & 1) && size) {
894 pci_user_write_config_byte(dev, off, data[off - init_off]);
895 off++;
896 size--;
897 }
898
899 if ((off & 3) && size > 2) {
900 u16 val = data[off - init_off];
901 val |= (u16) data[off - init_off + 1] << 8;
902 pci_user_write_config_word(dev, off, val);
903 off += 2;
904 size -= 2;
905 }
906
907 while (size > 3) {
908 u32 val = data[off - init_off];
909 val |= (u32) data[off - init_off + 1] << 8;
910 val |= (u32) data[off - init_off + 2] << 16;
911 val |= (u32) data[off - init_off + 3] << 24;
912 pci_user_write_config_dword(dev, off, val);
913 off += 4;
914 size -= 4;
915 }
916
917 if (size >= 2) {
918 u16 val = data[off - init_off];
919 val |= (u16) data[off - init_off + 1] << 8;
920 pci_user_write_config_word(dev, off, val);
921 off += 2;
922 size -= 2;
923 }
924
925 if (size) {
926 pci_user_write_config_byte(dev, off, data[off - init_off]);
927 off++;
928 --size;
929 }
930
931 pci_config_pm_runtime_put(dev);
932
933 return count;
934}
935
936static ssize_t read_vpd_attr(struct file *filp, struct kobject *kobj,
937 struct bin_attribute *bin_attr, char *buf,
938 loff_t off, size_t count)
939{
940 struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj));
941
942 if (bin_attr->size > 0) {
943 if (off > bin_attr->size)
944 count = 0;
945 else if (count > bin_attr->size - off)
946 count = bin_attr->size - off;
947 }
948
949 return pci_read_vpd(dev, off, count, buf);
950}
951
952static ssize_t write_vpd_attr(struct file *filp, struct kobject *kobj,
953 struct bin_attribute *bin_attr, char *buf,
954 loff_t off, size_t count)
955{
956 struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj));
957
958 if (bin_attr->size > 0) {
959 if (off > bin_attr->size)
960 count = 0;
961 else if (count > bin_attr->size - off)
962 count = bin_attr->size - off;
963 }
964
965 return pci_write_vpd(dev, off, count, buf);
966}
967
968#ifdef HAVE_PCI_LEGACY
969
970
971
972
973
974
975
976
977
978
979
980
981static ssize_t pci_read_legacy_io(struct file *filp, struct kobject *kobj,
982 struct bin_attribute *bin_attr, char *buf,
983 loff_t off, size_t count)
984{
985 struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj));
986
987
988 if (count != 1 && count != 2 && count != 4)
989 return -EINVAL;
990
991 return pci_legacy_read(bus, off, (u32 *)buf, count);
992}
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006static ssize_t pci_write_legacy_io(struct file *filp, struct kobject *kobj,
1007 struct bin_attribute *bin_attr, char *buf,
1008 loff_t off, size_t count)
1009{
1010 struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj));
1011
1012
1013 if (count != 1 && count != 2 && count != 4)
1014 return -EINVAL;
1015
1016 return pci_legacy_write(bus, off, *(u32 *)buf, count);
1017}
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030static int pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj,
1031 struct bin_attribute *attr,
1032 struct vm_area_struct *vma)
1033{
1034 struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj));
1035
1036 return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem);
1037}
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050static int pci_mmap_legacy_io(struct file *filp, struct kobject *kobj,
1051 struct bin_attribute *attr,
1052 struct vm_area_struct *vma)
1053{
1054 struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj));
1055
1056 return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io);
1057}
1058
1059
1060
1061
1062
1063
1064
1065
1066void __weak pci_adjust_legacy_attr(struct pci_bus *b,
1067 enum pci_mmap_state mmap_type)
1068{
1069}
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082void pci_create_legacy_files(struct pci_bus *b)
1083{
1084 int error;
1085
1086 b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2,
1087 GFP_ATOMIC);
1088 if (!b->legacy_io)
1089 goto kzalloc_err;
1090
1091 sysfs_bin_attr_init(b->legacy_io);
1092 b->legacy_io->attr.name = "legacy_io";
1093 b->legacy_io->size = 0xffff;
1094 b->legacy_io->attr.mode = S_IRUSR | S_IWUSR;
1095 b->legacy_io->read = pci_read_legacy_io;
1096 b->legacy_io->write = pci_write_legacy_io;
1097 b->legacy_io->mmap = pci_mmap_legacy_io;
1098 pci_adjust_legacy_attr(b, pci_mmap_io);
1099 error = device_create_bin_file(&b->dev, b->legacy_io);
1100 if (error)
1101 goto legacy_io_err;
1102
1103
1104 b->legacy_mem = b->legacy_io + 1;
1105 sysfs_bin_attr_init(b->legacy_mem);
1106 b->legacy_mem->attr.name = "legacy_mem";
1107 b->legacy_mem->size = 1024*1024;
1108 b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR;
1109 b->legacy_mem->mmap = pci_mmap_legacy_mem;
1110 pci_adjust_legacy_attr(b, pci_mmap_mem);
1111 error = device_create_bin_file(&b->dev, b->legacy_mem);
1112 if (error)
1113 goto legacy_mem_err;
1114
1115 return;
1116
1117legacy_mem_err:
1118 device_remove_bin_file(&b->dev, b->legacy_io);
1119legacy_io_err:
1120 kfree(b->legacy_io);
1121 b->legacy_io = NULL;
1122kzalloc_err:
1123 printk(KERN_WARNING "pci: warning: could not create legacy I/O port and ISA memory resources to sysfs\n");
1124 return;
1125}
1126
1127void pci_remove_legacy_files(struct pci_bus *b)
1128{
1129 if (b->legacy_io) {
1130 device_remove_bin_file(&b->dev, b->legacy_io);
1131 device_remove_bin_file(&b->dev, b->legacy_mem);
1132 kfree(b->legacy_io);
1133 }
1134}
1135#endif
1136
1137#if defined(HAVE_PCI_MMAP) || defined(ARCH_GENERIC_PCI_MMAP_RESOURCE)
1138
1139int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma,
1140 enum pci_mmap_api mmap_api)
1141{
1142 unsigned long nr, start, size;
1143 resource_size_t pci_start = 0, pci_end;
1144
1145 if (pci_resource_len(pdev, resno) == 0)
1146 return 0;
1147 nr = vma_pages(vma);
1148 start = vma->vm_pgoff;
1149 size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1;
1150 if (mmap_api == PCI_MMAP_PROCFS) {
1151 pci_resource_to_user(pdev, resno, &pdev->resource[resno],
1152 &pci_start, &pci_end);
1153 pci_start >>= PAGE_SHIFT;
1154 }
1155 if (start >= pci_start && start < pci_start + size &&
1156 start + nr <= pci_start + size)
1157 return 1;
1158 return 0;
1159}
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170static int pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
1171 struct vm_area_struct *vma, int write_combine)
1172{
1173 struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj));
1174 int bar = (unsigned long)attr->private;
1175 enum pci_mmap_state mmap_type;
1176 struct resource *res = &pdev->resource[bar];
1177
1178 if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(res->start))
1179 return -EINVAL;
1180
1181 if (!pci_mmap_fits(pdev, bar, vma, PCI_MMAP_SYSFS)) {
1182 WARN(1, "process \"%s\" tried to map 0x%08lx bytes at page 0x%08lx on %s BAR %d (start 0x%16Lx, size 0x%16Lx)\n",
1183 current->comm, vma->vm_end-vma->vm_start, vma->vm_pgoff,
1184 pci_name(pdev), bar,
1185 (u64)pci_resource_start(pdev, bar),
1186 (u64)pci_resource_len(pdev, bar));
1187 return -EINVAL;
1188 }
1189 mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;
1190
1191 return pci_mmap_resource_range(pdev, bar, vma, mmap_type, write_combine);
1192}
1193
1194static int pci_mmap_resource_uc(struct file *filp, struct kobject *kobj,
1195 struct bin_attribute *attr,
1196 struct vm_area_struct *vma)
1197{
1198 return pci_mmap_resource(kobj, attr, vma, 0);
1199}
1200
1201static int pci_mmap_resource_wc(struct file *filp, struct kobject *kobj,
1202 struct bin_attribute *attr,
1203 struct vm_area_struct *vma)
1204{
1205 return pci_mmap_resource(kobj, attr, vma, 1);
1206}
1207
1208static ssize_t pci_resource_io(struct file *filp, struct kobject *kobj,
1209 struct bin_attribute *attr, char *buf,
1210 loff_t off, size_t count, bool write)
1211{
1212 struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj));
1213 int bar = (unsigned long)attr->private;
1214 struct resource *res;
1215 unsigned long port = off;
1216
1217 res = &pdev->resource[bar];
1218
1219 port += pci_resource_start(pdev, bar);
1220
1221 if (port > pci_resource_end(pdev, bar))
1222 return 0;
1223
1224 if (port + count - 1 > pci_resource_end(pdev, bar))
1225 return -EINVAL;
1226
1227 switch (count) {
1228 case 1:
1229 if (write)
1230 outb(*(u8 *)buf, port);
1231 else
1232 *(u8 *)buf = inb(port);
1233 return 1;
1234 case 2:
1235 if (write)
1236 outw(*(u16 *)buf, port);
1237 else
1238 *(u16 *)buf = inw(port);
1239 return 2;
1240 case 4:
1241 if (write)
1242 outl(*(u32 *)buf, port);
1243 else
1244 *(u32 *)buf = inl(port);
1245 return 4;
1246 }
1247 return -EINVAL;
1248}
1249
1250static ssize_t pci_read_resource_io(struct file *filp, struct kobject *kobj,
1251 struct bin_attribute *attr, char *buf,
1252 loff_t off, size_t count)
1253{
1254 return pci_resource_io(filp, kobj, attr, buf, off, count, false);
1255}
1256
1257static ssize_t pci_write_resource_io(struct file *filp, struct kobject *kobj,
1258 struct bin_attribute *attr, char *buf,
1259 loff_t off, size_t count)
1260{
1261 return pci_resource_io(filp, kobj, attr, buf, off, count, true);
1262}
1263
1264
1265
1266
1267
1268
1269
1270
1271static void pci_remove_resource_files(struct pci_dev *pdev)
1272{
1273 int i;
1274
1275 for (i = 0; i < PCI_ROM_RESOURCE; i++) {
1276 struct bin_attribute *res_attr;
1277
1278 res_attr = pdev->res_attr[i];
1279 if (res_attr) {
1280 sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
1281 kfree(res_attr);
1282 }
1283
1284 res_attr = pdev->res_attr_wc[i];
1285 if (res_attr) {
1286 sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
1287 kfree(res_attr);
1288 }
1289 }
1290}
1291
1292static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine)
1293{
1294
1295 int name_len = write_combine ? 13 : 10;
1296 struct bin_attribute *res_attr;
1297 char *res_attr_name;
1298 int retval;
1299
1300 res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC);
1301 if (!res_attr)
1302 return -ENOMEM;
1303
1304 res_attr_name = (char *)(res_attr + 1);
1305
1306 sysfs_bin_attr_init(res_attr);
1307 if (write_combine) {
1308 pdev->res_attr_wc[num] = res_attr;
1309 sprintf(res_attr_name, "resource%d_wc", num);
1310 res_attr->mmap = pci_mmap_resource_wc;
1311 } else {
1312 pdev->res_attr[num] = res_attr;
1313 sprintf(res_attr_name, "resource%d", num);
1314 if (pci_resource_flags(pdev, num) & IORESOURCE_IO) {
1315 res_attr->read = pci_read_resource_io;
1316 res_attr->write = pci_write_resource_io;
1317 if (arch_can_pci_mmap_io())
1318 res_attr->mmap = pci_mmap_resource_uc;
1319 } else {
1320 res_attr->mmap = pci_mmap_resource_uc;
1321 }
1322 }
1323 res_attr->attr.name = res_attr_name;
1324 res_attr->attr.mode = S_IRUSR | S_IWUSR;
1325 res_attr->size = pci_resource_len(pdev, num);
1326 res_attr->private = (void *)(unsigned long)num;
1327 retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr);
1328 if (retval)
1329 kfree(res_attr);
1330
1331 return retval;
1332}
1333
1334
1335
1336
1337
1338
1339
1340static int pci_create_resource_files(struct pci_dev *pdev)
1341{
1342 int i;
1343 int retval;
1344
1345
1346 for (i = 0; i < PCI_ROM_RESOURCE; i++) {
1347
1348
1349 if (!pci_resource_len(pdev, i))
1350 continue;
1351
1352 retval = pci_create_attr(pdev, i, 0);
1353
1354 if (!retval && arch_can_pci_mmap_wc() &&
1355 pdev->resource[i].flags & IORESOURCE_PREFETCH)
1356 retval = pci_create_attr(pdev, i, 1);
1357 if (retval) {
1358 pci_remove_resource_files(pdev);
1359 return retval;
1360 }
1361 }
1362 return 0;
1363}
1364#else
1365int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; }
1366void __weak pci_remove_resource_files(struct pci_dev *dev) { return; }
1367#endif
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380static ssize_t pci_write_rom(struct file *filp, struct kobject *kobj,
1381 struct bin_attribute *bin_attr, char *buf,
1382 loff_t off, size_t count)
1383{
1384 struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj));
1385
1386 if ((off == 0) && (*buf == '0') && (count == 2))
1387 pdev->rom_attr_enabled = 0;
1388 else
1389 pdev->rom_attr_enabled = 1;
1390
1391 return count;
1392}
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406static ssize_t pci_read_rom(struct file *filp, struct kobject *kobj,
1407 struct bin_attribute *bin_attr, char *buf,
1408 loff_t off, size_t count)
1409{
1410 struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj));
1411 void __iomem *rom;
1412 size_t size;
1413
1414 if (!pdev->rom_attr_enabled)
1415 return -EINVAL;
1416
1417 rom = pci_map_rom(pdev, &size);
1418 if (!rom || !size)
1419 return -EIO;
1420
1421 if (off >= size)
1422 count = 0;
1423 else {
1424 if (off + count > size)
1425 count = size - off;
1426
1427 memcpy_fromio(buf, rom + off, count);
1428 }
1429 pci_unmap_rom(pdev, rom);
1430
1431 return count;
1432}
1433
1434static struct bin_attribute pci_config_attr = {
1435 .attr = {
1436 .name = "config",
1437 .mode = S_IRUGO | S_IWUSR,
1438 },
1439 .size = PCI_CFG_SPACE_SIZE,
1440 .read = pci_read_config,
1441 .write = pci_write_config,
1442};
1443
1444static struct bin_attribute pcie_config_attr = {
1445 .attr = {
1446 .name = "config",
1447 .mode = S_IRUGO | S_IWUSR,
1448 },
1449 .size = PCI_CFG_SPACE_EXP_SIZE,
1450 .read = pci_read_config,
1451 .write = pci_write_config,
1452};
1453
1454static ssize_t reset_store(struct device *dev, struct device_attribute *attr,
1455 const char *buf, size_t count)
1456{
1457 struct pci_dev *pdev = to_pci_dev(dev);
1458 unsigned long val;
1459 ssize_t result = kstrtoul(buf, 0, &val);
1460
1461 if (result < 0)
1462 return result;
1463
1464 if (val != 1)
1465 return -EINVAL;
1466
1467 result = pci_reset_function(pdev);
1468 if (result < 0)
1469 return result;
1470
1471 return count;
1472}
1473
1474static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store);
1475
1476static int pci_create_capabilities_sysfs(struct pci_dev *dev)
1477{
1478 int retval;
1479 struct bin_attribute *attr;
1480
1481
1482 if (dev->vpd) {
1483 attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
1484 if (!attr)
1485 return -ENOMEM;
1486
1487 sysfs_bin_attr_init(attr);
1488 attr->size = 0;
1489 attr->attr.name = "vpd";
1490 attr->attr.mode = S_IRUSR | S_IWUSR;
1491 attr->read = read_vpd_attr;
1492 attr->write = write_vpd_attr;
1493 retval = sysfs_create_bin_file(&dev->dev.kobj, attr);
1494 if (retval) {
1495 kfree(attr);
1496 return retval;
1497 }
1498 dev->vpd->attr = attr;
1499 }
1500
1501
1502 pcie_aspm_create_sysfs_dev_files(dev);
1503
1504 if (!pci_probe_reset_function(dev)) {
1505 retval = device_create_file(&dev->dev, &reset_attr);
1506 if (retval)
1507 goto error;
1508 dev->reset_fn = 1;
1509 }
1510 return 0;
1511
1512error:
1513 pcie_aspm_remove_sysfs_dev_files(dev);
1514 if (dev->vpd && dev->vpd->attr) {
1515 sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
1516 kfree(dev->vpd->attr);
1517 }
1518
1519 return retval;
1520}
1521
1522int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev)
1523{
1524 int retval;
1525 int rom_size;
1526 struct bin_attribute *attr;
1527
1528 if (!sysfs_initialized)
1529 return -EACCES;
1530
1531 if (pdev->cfg_size > PCI_CFG_SPACE_SIZE)
1532 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr);
1533 else
1534 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr);
1535 if (retval)
1536 goto err;
1537
1538 retval = pci_create_resource_files(pdev);
1539 if (retval)
1540 goto err_config_file;
1541
1542
1543 rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
1544 if (rom_size) {
1545 attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
1546 if (!attr) {
1547 retval = -ENOMEM;
1548 goto err_resource_files;
1549 }
1550 sysfs_bin_attr_init(attr);
1551 attr->size = rom_size;
1552 attr->attr.name = "rom";
1553 attr->attr.mode = S_IRUSR | S_IWUSR;
1554 attr->read = pci_read_rom;
1555 attr->write = pci_write_rom;
1556 retval = sysfs_create_bin_file(&pdev->dev.kobj, attr);
1557 if (retval) {
1558 kfree(attr);
1559 goto err_resource_files;
1560 }
1561 pdev->rom_attr = attr;
1562 }
1563
1564
1565 retval = pci_create_capabilities_sysfs(pdev);
1566 if (retval)
1567 goto err_rom_file;
1568
1569 pci_create_firmware_label_files(pdev);
1570
1571 return 0;
1572
1573err_rom_file:
1574 if (pdev->rom_attr) {
1575 sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
1576 kfree(pdev->rom_attr);
1577 pdev->rom_attr = NULL;
1578 }
1579err_resource_files:
1580 pci_remove_resource_files(pdev);
1581err_config_file:
1582 if (pdev->cfg_size > PCI_CFG_SPACE_SIZE)
1583 sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
1584 else
1585 sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
1586err:
1587 return retval;
1588}
1589
1590static void pci_remove_capabilities_sysfs(struct pci_dev *dev)
1591{
1592 if (dev->vpd && dev->vpd->attr) {
1593 sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
1594 kfree(dev->vpd->attr);
1595 }
1596
1597 pcie_aspm_remove_sysfs_dev_files(dev);
1598 if (dev->reset_fn) {
1599 device_remove_file(&dev->dev, &reset_attr);
1600 dev->reset_fn = 0;
1601 }
1602}
1603
1604
1605
1606
1607
1608
1609
1610void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
1611{
1612 if (!sysfs_initialized)
1613 return;
1614
1615 pci_remove_capabilities_sysfs(pdev);
1616
1617 if (pdev->cfg_size > PCI_CFG_SPACE_SIZE)
1618 sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
1619 else
1620 sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
1621
1622 pci_remove_resource_files(pdev);
1623
1624 if (pdev->rom_attr) {
1625 sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
1626 kfree(pdev->rom_attr);
1627 pdev->rom_attr = NULL;
1628 }
1629
1630 pci_remove_firmware_label_files(pdev);
1631}
1632
1633static int __init pci_sysfs_init(void)
1634{
1635 struct pci_dev *pdev = NULL;
1636 int retval;
1637
1638 sysfs_initialized = 1;
1639 for_each_pci_dev(pdev) {
1640 retval = pci_create_sysfs_dev_files(pdev);
1641 if (retval) {
1642 pci_dev_put(pdev);
1643 return retval;
1644 }
1645 }
1646
1647 return 0;
1648}
1649late_initcall(pci_sysfs_init);
1650
1651static struct attribute *pci_dev_dev_attrs[] = {
1652 &vga_attr.attr,
1653 NULL,
1654};
1655
1656static umode_t pci_dev_attrs_are_visible(struct kobject *kobj,
1657 struct attribute *a, int n)
1658{
1659 struct device *dev = kobj_to_dev(kobj);
1660 struct pci_dev *pdev = to_pci_dev(dev);
1661
1662 if (a == &vga_attr.attr)
1663 if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
1664 return 0;
1665
1666 return a->mode;
1667}
1668
1669static struct attribute *pci_dev_hp_attrs[] = {
1670 &dev_remove_attr.attr,
1671 &dev_rescan_attr.attr,
1672 NULL,
1673};
1674
1675static umode_t pci_dev_hp_attrs_are_visible(struct kobject *kobj,
1676 struct attribute *a, int n)
1677{
1678 struct device *dev = kobj_to_dev(kobj);
1679 struct pci_dev *pdev = to_pci_dev(dev);
1680
1681 if (pdev->is_virtfn)
1682 return 0;
1683
1684 return a->mode;
1685}
1686
1687static umode_t pci_bridge_attrs_are_visible(struct kobject *kobj,
1688 struct attribute *a, int n)
1689{
1690 struct device *dev = kobj_to_dev(kobj);
1691 struct pci_dev *pdev = to_pci_dev(dev);
1692
1693 if (pci_is_bridge(pdev))
1694 return a->mode;
1695
1696 return 0;
1697}
1698
1699static umode_t pcie_dev_attrs_are_visible(struct kobject *kobj,
1700 struct attribute *a, int n)
1701{
1702 struct device *dev = kobj_to_dev(kobj);
1703 struct pci_dev *pdev = to_pci_dev(dev);
1704
1705 if (pci_is_pcie(pdev))
1706 return a->mode;
1707
1708 return 0;
1709}
1710
1711static const struct attribute_group pci_dev_group = {
1712 .attrs = pci_dev_attrs,
1713};
1714
1715const struct attribute_group *pci_dev_groups[] = {
1716 &pci_dev_group,
1717 NULL,
1718};
1719
1720static const struct attribute_group pci_bridge_group = {
1721 .attrs = pci_bridge_attrs,
1722};
1723
1724const struct attribute_group *pci_bridge_groups[] = {
1725 &pci_bridge_group,
1726 NULL,
1727};
1728
1729static const struct attribute_group pcie_dev_group = {
1730 .attrs = pcie_dev_attrs,
1731};
1732
1733const struct attribute_group *pcie_dev_groups[] = {
1734 &pcie_dev_group,
1735 NULL,
1736};
1737
1738static struct attribute_group pci_dev_hp_attr_group = {
1739 .attrs = pci_dev_hp_attrs,
1740 .is_visible = pci_dev_hp_attrs_are_visible,
1741};
1742
1743#ifdef CONFIG_PCI_IOV
1744static struct attribute *sriov_dev_attrs[] = {
1745 &sriov_totalvfs_attr.attr,
1746 &sriov_numvfs_attr.attr,
1747 &sriov_drivers_autoprobe_attr.attr,
1748 NULL,
1749};
1750
1751static umode_t sriov_attrs_are_visible(struct kobject *kobj,
1752 struct attribute *a, int n)
1753{
1754 struct device *dev = kobj_to_dev(kobj);
1755
1756 if (!dev_is_pf(dev))
1757 return 0;
1758
1759 return a->mode;
1760}
1761
1762static struct attribute_group sriov_dev_attr_group = {
1763 .attrs = sriov_dev_attrs,
1764 .is_visible = sriov_attrs_are_visible,
1765};
1766#endif
1767
1768static struct attribute_group pci_dev_attr_group = {
1769 .attrs = pci_dev_dev_attrs,
1770 .is_visible = pci_dev_attrs_are_visible,
1771};
1772
1773static struct attribute_group pci_bridge_attr_group = {
1774 .attrs = pci_bridge_attrs,
1775 .is_visible = pci_bridge_attrs_are_visible,
1776};
1777
1778static struct attribute_group pcie_dev_attr_group = {
1779 .attrs = pcie_dev_attrs,
1780 .is_visible = pcie_dev_attrs_are_visible,
1781};
1782
1783static const struct attribute_group *pci_dev_attr_groups[] = {
1784 &pci_dev_attr_group,
1785 &pci_dev_hp_attr_group,
1786#ifdef CONFIG_PCI_IOV
1787 &sriov_dev_attr_group,
1788#endif
1789 &pci_bridge_attr_group,
1790 &pcie_dev_attr_group,
1791 NULL,
1792};
1793
1794struct device_type pci_dev_type = {
1795 .groups = pci_dev_attr_groups,
1796};
1797
