1 // SPDX-License-Identifier: GPL-2.0
3 * drivers/pci/pci-sysfs.c
5 * (C) Copyright 2002-2004 Greg Kroah-Hartman <greg@kroah.com>
6 * (C) Copyright 2002-2004 IBM Corp.
7 * (C) Copyright 2003 Matthew Wilcox
8 * (C) Copyright 2003 Hewlett-Packard
9 * (C) Copyright 2004 Jon Smirl <jonsmirl@yahoo.com>
10 * (C) Copyright 2004 Silicon Graphics, Inc. Jesse Barnes <jbarnes@sgi.com>
12 * File attributes for PCI devices
14 * Modeled after usb's driverfs.c
19 #include <linux/kernel.h>
20 #include <linux/sched.h>
21 #include <linux/pci.h>
22 #include <linux/stat.h>
23 #include <linux/export.h>
24 #include <linux/topology.h>
27 #include <linux/capability.h>
28 #include <linux/security.h>
29 #include <linux/pci-aspm.h>
30 #include <linux/slab.h>
31 #include <linux/vgaarb.h>
32 #include <linux/pm_runtime.h>
36 static int sysfs_initialized
; /* = 0 */
38 /* show configuration fields */
39 #define pci_config_attr(field, format_string) \
41 field##_show(struct device *dev, struct device_attribute *attr, char *buf) \
43 struct pci_dev *pdev; \
45 pdev = to_pci_dev(dev); \
46 return sprintf(buf, format_string, pdev->field); \
48 static DEVICE_ATTR_RO(field)
50 pci_config_attr(vendor
, "0x%04x\n");
51 pci_config_attr(device
, "0x%04x\n");
52 pci_config_attr(subsystem_vendor
, "0x%04x\n");
53 pci_config_attr(subsystem_device
, "0x%04x\n");
54 pci_config_attr(revision
, "0x%02x\n");
55 pci_config_attr(class, "0x%06x\n");
56 pci_config_attr(irq
, "%u\n");
58 static ssize_t
broken_parity_status_show(struct device
*dev
,
59 struct device_attribute
*attr
,
62 struct pci_dev
*pdev
= to_pci_dev(dev
);
63 return sprintf(buf
, "%u\n", pdev
->broken_parity_status
);
66 static ssize_t
broken_parity_status_store(struct device
*dev
,
67 struct device_attribute
*attr
,
68 const char *buf
, size_t count
)
70 struct pci_dev
*pdev
= to_pci_dev(dev
);
73 if (kstrtoul(buf
, 0, &val
) < 0)
76 pdev
->broken_parity_status
= !!val
;
80 static DEVICE_ATTR_RW(broken_parity_status
);
82 static ssize_t
pci_dev_show_local_cpu(struct device
*dev
, bool list
,
83 struct device_attribute
*attr
, char *buf
)
85 const struct cpumask
*mask
;
88 mask
= (dev_to_node(dev
) == -1) ? cpu_online_mask
:
89 cpumask_of_node(dev_to_node(dev
));
91 mask
= cpumask_of_pcibus(to_pci_dev(dev
)->bus
);
93 return cpumap_print_to_pagebuf(list
, buf
, mask
);
96 static ssize_t
local_cpus_show(struct device
*dev
,
97 struct device_attribute
*attr
, char *buf
)
99 return pci_dev_show_local_cpu(dev
, false, attr
, buf
);
101 static DEVICE_ATTR_RO(local_cpus
);
103 static ssize_t
local_cpulist_show(struct device
*dev
,
104 struct device_attribute
*attr
, char *buf
)
106 return pci_dev_show_local_cpu(dev
, true, attr
, buf
);
108 static DEVICE_ATTR_RO(local_cpulist
);
111 * PCI Bus Class Devices
113 static ssize_t
cpuaffinity_show(struct device
*dev
,
114 struct device_attribute
*attr
, char *buf
)
116 const struct cpumask
*cpumask
= cpumask_of_pcibus(to_pci_bus(dev
));
118 return cpumap_print_to_pagebuf(false, buf
, cpumask
);
120 static DEVICE_ATTR_RO(cpuaffinity
);
122 static ssize_t
cpulistaffinity_show(struct device
*dev
,
123 struct device_attribute
*attr
, char *buf
)
125 const struct cpumask
*cpumask
= cpumask_of_pcibus(to_pci_bus(dev
));
127 return cpumap_print_to_pagebuf(true, buf
, cpumask
);
129 static DEVICE_ATTR_RO(cpulistaffinity
);
132 static ssize_t
resource_show(struct device
*dev
, struct device_attribute
*attr
,
135 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
139 resource_size_t start
, end
;
141 if (pci_dev
->subordinate
)
142 max
= DEVICE_COUNT_RESOURCE
;
144 max
= PCI_BRIDGE_RESOURCES
;
146 for (i
= 0; i
< max
; i
++) {
147 struct resource
*res
= &pci_dev
->resource
[i
];
148 pci_resource_to_user(pci_dev
, i
, res
, &start
, &end
);
149 str
+= sprintf(str
, "0x%016llx 0x%016llx 0x%016llx\n",
150 (unsigned long long)start
,
151 (unsigned long long)end
,
152 (unsigned long long)res
->flags
);
156 static DEVICE_ATTR_RO(resource
);
158 static ssize_t
max_link_speed_show(struct device
*dev
,
159 struct device_attribute
*attr
, char *buf
)
161 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
166 err
= pcie_capability_read_dword(pci_dev
, PCI_EXP_LNKCAP
, &linkcap
);
170 switch (linkcap
& PCI_EXP_LNKCAP_SLS
) {
171 case PCI_EXP_LNKCAP_SLS_16_0GB
:
174 case PCI_EXP_LNKCAP_SLS_8_0GB
:
177 case PCI_EXP_LNKCAP_SLS_5_0GB
:
180 case PCI_EXP_LNKCAP_SLS_2_5GB
:
184 speed
= "Unknown speed";
187 return sprintf(buf
, "%s\n", speed
);
189 static DEVICE_ATTR_RO(max_link_speed
);
191 static ssize_t
max_link_width_show(struct device
*dev
,
192 struct device_attribute
*attr
, char *buf
)
194 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
198 err
= pcie_capability_read_dword(pci_dev
, PCI_EXP_LNKCAP
, &linkcap
);
202 return sprintf(buf
, "%u\n", (linkcap
& PCI_EXP_LNKCAP_MLW
) >> 4);
204 static DEVICE_ATTR_RO(max_link_width
);
206 static ssize_t
current_link_speed_show(struct device
*dev
,
207 struct device_attribute
*attr
, char *buf
)
209 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
214 err
= pcie_capability_read_word(pci_dev
, PCI_EXP_LNKSTA
, &linkstat
);
218 switch (linkstat
& PCI_EXP_LNKSTA_CLS
) {
219 case PCI_EXP_LNKSTA_CLS_16_0GB
:
222 case PCI_EXP_LNKSTA_CLS_8_0GB
:
225 case PCI_EXP_LNKSTA_CLS_5_0GB
:
228 case PCI_EXP_LNKSTA_CLS_2_5GB
:
232 speed
= "Unknown speed";
235 return sprintf(buf
, "%s\n", speed
);
237 static DEVICE_ATTR_RO(current_link_speed
);
239 static ssize_t
current_link_width_show(struct device
*dev
,
240 struct device_attribute
*attr
, char *buf
)
242 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
246 err
= pcie_capability_read_word(pci_dev
, PCI_EXP_LNKSTA
, &linkstat
);
250 return sprintf(buf
, "%u\n",
251 (linkstat
& PCI_EXP_LNKSTA_NLW
) >> PCI_EXP_LNKSTA_NLW_SHIFT
);
253 static DEVICE_ATTR_RO(current_link_width
);
255 static ssize_t
secondary_bus_number_show(struct device
*dev
,
256 struct device_attribute
*attr
,
259 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
263 err
= pci_read_config_byte(pci_dev
, PCI_SECONDARY_BUS
, &sec_bus
);
267 return sprintf(buf
, "%u\n", sec_bus
);
269 static DEVICE_ATTR_RO(secondary_bus_number
);
271 static ssize_t
subordinate_bus_number_show(struct device
*dev
,
272 struct device_attribute
*attr
,
275 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
279 err
= pci_read_config_byte(pci_dev
, PCI_SUBORDINATE_BUS
, &sub_bus
);
283 return sprintf(buf
, "%u\n", sub_bus
);
285 static DEVICE_ATTR_RO(subordinate_bus_number
);
287 static ssize_t
modalias_show(struct device
*dev
, struct device_attribute
*attr
,
290 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
292 return sprintf(buf
, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02X\n",
293 pci_dev
->vendor
, pci_dev
->device
,
294 pci_dev
->subsystem_vendor
, pci_dev
->subsystem_device
,
295 (u8
)(pci_dev
->class >> 16), (u8
)(pci_dev
->class >> 8),
296 (u8
)(pci_dev
->class));
298 static DEVICE_ATTR_RO(modalias
);
300 static ssize_t
enable_store(struct device
*dev
, struct device_attribute
*attr
,
301 const char *buf
, size_t count
)
303 struct pci_dev
*pdev
= to_pci_dev(dev
);
305 ssize_t result
= kstrtoul(buf
, 0, &val
);
310 /* this can crash the machine when done on the "wrong" device */
311 if (!capable(CAP_SYS_ADMIN
))
318 result
= pci_enable_device(pdev
);
319 else if (pci_is_enabled(pdev
))
320 pci_disable_device(pdev
);
325 return result
< 0 ? result
: count
;
328 static ssize_t
enable_show(struct device
*dev
, struct device_attribute
*attr
,
331 struct pci_dev
*pdev
;
333 pdev
= to_pci_dev(dev
);
334 return sprintf(buf
, "%u\n", atomic_read(&pdev
->enable_cnt
));
336 static DEVICE_ATTR_RW(enable
);
339 static ssize_t
numa_node_store(struct device
*dev
,
340 struct device_attribute
*attr
, const char *buf
,
343 struct pci_dev
*pdev
= to_pci_dev(dev
);
346 if (!capable(CAP_SYS_ADMIN
))
349 ret
= kstrtoint(buf
, 0, &node
);
353 if ((node
< 0 && node
!= NUMA_NO_NODE
) || node
>= MAX_NUMNODES
)
356 if (node
!= NUMA_NO_NODE
&& !node_online(node
))
359 add_taint(TAINT_FIRMWARE_WORKAROUND
, LOCKDEP_STILL_OK
);
360 dev_alert(&pdev
->dev
, FW_BUG
"Overriding NUMA node to %d. Contact your vendor for updates.",
363 dev
->numa_node
= node
;
367 static ssize_t
numa_node_show(struct device
*dev
, struct device_attribute
*attr
,
370 return sprintf(buf
, "%d\n", dev
->numa_node
);
372 static DEVICE_ATTR_RW(numa_node
);
375 static ssize_t
dma_mask_bits_show(struct device
*dev
,
376 struct device_attribute
*attr
, char *buf
)
378 struct pci_dev
*pdev
= to_pci_dev(dev
);
380 return sprintf(buf
, "%d\n", fls64(pdev
->dma_mask
));
382 static DEVICE_ATTR_RO(dma_mask_bits
);
384 static ssize_t
consistent_dma_mask_bits_show(struct device
*dev
,
385 struct device_attribute
*attr
,
388 return sprintf(buf
, "%d\n", fls64(dev
->coherent_dma_mask
));
390 static DEVICE_ATTR_RO(consistent_dma_mask_bits
);
392 static ssize_t
msi_bus_show(struct device
*dev
, struct device_attribute
*attr
,
395 struct pci_dev
*pdev
= to_pci_dev(dev
);
396 struct pci_bus
*subordinate
= pdev
->subordinate
;
398 return sprintf(buf
, "%u\n", subordinate
?
399 !(subordinate
->bus_flags
& PCI_BUS_FLAGS_NO_MSI
)
403 static ssize_t
msi_bus_store(struct device
*dev
, struct device_attribute
*attr
,
404 const char *buf
, size_t count
)
406 struct pci_dev
*pdev
= to_pci_dev(dev
);
407 struct pci_bus
*subordinate
= pdev
->subordinate
;
410 if (kstrtoul(buf
, 0, &val
) < 0)
413 if (!capable(CAP_SYS_ADMIN
))
417 * "no_msi" and "bus_flags" only affect what happens when a driver
418 * requests MSI or MSI-X. They don't affect any drivers that have
419 * already requested MSI or MSI-X.
423 dev_info(&pdev
->dev
, "MSI/MSI-X %s for future drivers\n",
424 val
? "allowed" : "disallowed");
429 subordinate
->bus_flags
&= ~PCI_BUS_FLAGS_NO_MSI
;
431 subordinate
->bus_flags
|= PCI_BUS_FLAGS_NO_MSI
;
433 dev_info(&subordinate
->dev
, "MSI/MSI-X %s for future drivers of devices on this bus\n",
434 val
? "allowed" : "disallowed");
437 static DEVICE_ATTR_RW(msi_bus
);
439 static ssize_t
bus_rescan_store(struct bus_type
*bus
, const char *buf
,
443 struct pci_bus
*b
= NULL
;
445 if (kstrtoul(buf
, 0, &val
) < 0)
449 pci_lock_rescan_remove();
450 while ((b
= pci_find_next_bus(b
)) != NULL
)
452 pci_unlock_rescan_remove();
456 static BUS_ATTR(rescan
, (S_IWUSR
|S_IWGRP
), NULL
, bus_rescan_store
);
458 static struct attribute
*pci_bus_attrs
[] = {
459 &bus_attr_rescan
.attr
,
463 static const struct attribute_group pci_bus_group
= {
464 .attrs
= pci_bus_attrs
,
467 const struct attribute_group
*pci_bus_groups
[] = {
472 static ssize_t
dev_rescan_store(struct device
*dev
,
473 struct device_attribute
*attr
, const char *buf
,
477 struct pci_dev
*pdev
= to_pci_dev(dev
);
479 if (kstrtoul(buf
, 0, &val
) < 0)
483 pci_lock_rescan_remove();
484 pci_rescan_bus(pdev
->bus
);
485 pci_unlock_rescan_remove();
489 static struct device_attribute dev_rescan_attr
= __ATTR(rescan
,
491 NULL
, dev_rescan_store
);
493 static ssize_t
remove_store(struct device
*dev
, struct device_attribute
*attr
,
494 const char *buf
, size_t count
)
498 if (kstrtoul(buf
, 0, &val
) < 0)
501 if (val
&& device_remove_file_self(dev
, attr
))
502 pci_stop_and_remove_bus_device_locked(to_pci_dev(dev
));
505 static struct device_attribute dev_remove_attr
= __ATTR(remove
,
509 static ssize_t
dev_bus_rescan_store(struct device
*dev
,
510 struct device_attribute
*attr
,
511 const char *buf
, size_t count
)
514 struct pci_bus
*bus
= to_pci_bus(dev
);
516 if (kstrtoul(buf
, 0, &val
) < 0)
520 pci_lock_rescan_remove();
521 if (!pci_is_root_bus(bus
) && list_empty(&bus
->devices
))
522 pci_rescan_bus_bridge_resize(bus
->self
);
525 pci_unlock_rescan_remove();
529 static DEVICE_ATTR(rescan
, (S_IWUSR
|S_IWGRP
), NULL
, dev_bus_rescan_store
);
531 #if defined(CONFIG_PM) && defined(CONFIG_ACPI)
532 static ssize_t
d3cold_allowed_store(struct device
*dev
,
533 struct device_attribute
*attr
,
534 const char *buf
, size_t count
)
536 struct pci_dev
*pdev
= to_pci_dev(dev
);
539 if (kstrtoul(buf
, 0, &val
) < 0)
542 pdev
->d3cold_allowed
= !!val
;
543 if (pdev
->d3cold_allowed
)
544 pci_d3cold_enable(pdev
);
546 pci_d3cold_disable(pdev
);
548 pm_runtime_resume(dev
);
553 static ssize_t
d3cold_allowed_show(struct device
*dev
,
554 struct device_attribute
*attr
, char *buf
)
556 struct pci_dev
*pdev
= to_pci_dev(dev
);
557 return sprintf(buf
, "%u\n", pdev
->d3cold_allowed
);
559 static DEVICE_ATTR_RW(d3cold_allowed
);
563 static ssize_t
devspec_show(struct device
*dev
,
564 struct device_attribute
*attr
, char *buf
)
566 struct pci_dev
*pdev
= to_pci_dev(dev
);
567 struct device_node
*np
= pci_device_to_OF_node(pdev
);
571 return sprintf(buf
, "%pOF", np
);
573 static DEVICE_ATTR_RO(devspec
);
576 #ifdef CONFIG_PCI_IOV
577 static ssize_t
sriov_totalvfs_show(struct device
*dev
,
578 struct device_attribute
*attr
,
581 struct pci_dev
*pdev
= to_pci_dev(dev
);
583 return sprintf(buf
, "%u\n", pci_sriov_get_totalvfs(pdev
));
587 static ssize_t
sriov_numvfs_show(struct device
*dev
,
588 struct device_attribute
*attr
,
591 struct pci_dev
*pdev
= to_pci_dev(dev
);
593 return sprintf(buf
, "%u\n", pdev
->sriov
->num_VFs
);
597 * num_vfs > 0; number of VFs to enable
598 * num_vfs = 0; disable all VFs
600 * Note: SRIOV spec doesn't allow partial VF
601 * disable, so it's all or none.
603 static ssize_t
sriov_numvfs_store(struct device
*dev
,
604 struct device_attribute
*attr
,
605 const char *buf
, size_t count
)
607 struct pci_dev
*pdev
= to_pci_dev(dev
);
611 ret
= kstrtou16(buf
, 0, &num_vfs
);
615 if (num_vfs
> pci_sriov_get_totalvfs(pdev
))
618 device_lock(&pdev
->dev
);
620 if (num_vfs
== pdev
->sriov
->num_VFs
)
623 /* is PF driver loaded w/callback */
624 if (!pdev
->driver
|| !pdev
->driver
->sriov_configure
) {
625 dev_info(&pdev
->dev
, "Driver doesn't support SRIOV configuration via sysfs\n");
632 ret
= pdev
->driver
->sriov_configure(pdev
, 0);
637 if (pdev
->sriov
->num_VFs
) {
638 dev_warn(&pdev
->dev
, "%d VFs already enabled. Disable before enabling %d VFs\n",
639 pdev
->sriov
->num_VFs
, num_vfs
);
644 ret
= pdev
->driver
->sriov_configure(pdev
, num_vfs
);
649 dev_warn(&pdev
->dev
, "%d VFs requested; only %d enabled\n",
653 device_unlock(&pdev
->dev
);
661 static ssize_t
sriov_offset_show(struct device
*dev
,
662 struct device_attribute
*attr
,
665 struct pci_dev
*pdev
= to_pci_dev(dev
);
667 return sprintf(buf
, "%u\n", pdev
->sriov
->offset
);
670 static ssize_t
sriov_stride_show(struct device
*dev
,
671 struct device_attribute
*attr
,
674 struct pci_dev
*pdev
= to_pci_dev(dev
);
676 return sprintf(buf
, "%u\n", pdev
->sriov
->stride
);
679 static ssize_t
sriov_vf_device_show(struct device
*dev
,
680 struct device_attribute
*attr
,
683 struct pci_dev
*pdev
= to_pci_dev(dev
);
685 return sprintf(buf
, "%x\n", pdev
->sriov
->vf_device
);
688 static ssize_t
sriov_drivers_autoprobe_show(struct device
*dev
,
689 struct device_attribute
*attr
,
692 struct pci_dev
*pdev
= to_pci_dev(dev
);
694 return sprintf(buf
, "%u\n", pdev
->sriov
->drivers_autoprobe
);
697 static ssize_t
sriov_drivers_autoprobe_store(struct device
*dev
,
698 struct device_attribute
*attr
,
699 const char *buf
, size_t count
)
701 struct pci_dev
*pdev
= to_pci_dev(dev
);
702 bool drivers_autoprobe
;
704 if (kstrtobool(buf
, &drivers_autoprobe
) < 0)
707 pdev
->sriov
->drivers_autoprobe
= drivers_autoprobe
;
712 static struct device_attribute sriov_totalvfs_attr
= __ATTR_RO(sriov_totalvfs
);
713 static struct device_attribute sriov_numvfs_attr
=
714 __ATTR(sriov_numvfs
, (S_IRUGO
|S_IWUSR
|S_IWGRP
),
715 sriov_numvfs_show
, sriov_numvfs_store
);
716 static struct device_attribute sriov_offset_attr
= __ATTR_RO(sriov_offset
);
717 static struct device_attribute sriov_stride_attr
= __ATTR_RO(sriov_stride
);
718 static struct device_attribute sriov_vf_device_attr
= __ATTR_RO(sriov_vf_device
);
719 static struct device_attribute sriov_drivers_autoprobe_attr
=
720 __ATTR(sriov_drivers_autoprobe
, (S_IRUGO
|S_IWUSR
|S_IWGRP
),
721 sriov_drivers_autoprobe_show
, sriov_drivers_autoprobe_store
);
722 #endif /* CONFIG_PCI_IOV */
724 static ssize_t
driver_override_store(struct device
*dev
,
725 struct device_attribute
*attr
,
726 const char *buf
, size_t count
)
728 struct pci_dev
*pdev
= to_pci_dev(dev
);
729 char *driver_override
, *old
, *cp
;
731 /* We need to keep extra room for a newline */
732 if (count
>= (PAGE_SIZE
- 1))
735 driver_override
= kstrndup(buf
, count
, GFP_KERNEL
);
736 if (!driver_override
)
739 cp
= strchr(driver_override
, '\n');
744 old
= pdev
->driver_override
;
745 if (strlen(driver_override
)) {
746 pdev
->driver_override
= driver_override
;
748 kfree(driver_override
);
749 pdev
->driver_override
= NULL
;
758 static ssize_t
driver_override_show(struct device
*dev
,
759 struct device_attribute
*attr
, char *buf
)
761 struct pci_dev
*pdev
= to_pci_dev(dev
);
765 len
= snprintf(buf
, PAGE_SIZE
, "%s\n", pdev
->driver_override
);
769 static DEVICE_ATTR_RW(driver_override
);
771 static struct attribute
*pci_dev_attrs
[] = {
772 &dev_attr_resource
.attr
,
773 &dev_attr_vendor
.attr
,
774 &dev_attr_device
.attr
,
775 &dev_attr_subsystem_vendor
.attr
,
776 &dev_attr_subsystem_device
.attr
,
777 &dev_attr_revision
.attr
,
778 &dev_attr_class
.attr
,
780 &dev_attr_local_cpus
.attr
,
781 &dev_attr_local_cpulist
.attr
,
782 &dev_attr_modalias
.attr
,
784 &dev_attr_numa_node
.attr
,
786 &dev_attr_dma_mask_bits
.attr
,
787 &dev_attr_consistent_dma_mask_bits
.attr
,
788 &dev_attr_enable
.attr
,
789 &dev_attr_broken_parity_status
.attr
,
790 &dev_attr_msi_bus
.attr
,
791 #if defined(CONFIG_PM) && defined(CONFIG_ACPI)
792 &dev_attr_d3cold_allowed
.attr
,
795 &dev_attr_devspec
.attr
,
797 &dev_attr_driver_override
.attr
,
801 static struct attribute
*pci_bridge_attrs
[] = {
802 &dev_attr_subordinate_bus_number
.attr
,
803 &dev_attr_secondary_bus_number
.attr
,
807 static struct attribute
*pcie_dev_attrs
[] = {
808 &dev_attr_current_link_speed
.attr
,
809 &dev_attr_current_link_width
.attr
,
810 &dev_attr_max_link_width
.attr
,
811 &dev_attr_max_link_speed
.attr
,
815 static struct attribute
*pcibus_attrs
[] = {
816 &dev_attr_rescan
.attr
,
817 &dev_attr_cpuaffinity
.attr
,
818 &dev_attr_cpulistaffinity
.attr
,
822 static const struct attribute_group pcibus_group
= {
823 .attrs
= pcibus_attrs
,
826 const struct attribute_group
*pcibus_groups
[] = {
831 static ssize_t
boot_vga_show(struct device
*dev
, struct device_attribute
*attr
,
834 struct pci_dev
*pdev
= to_pci_dev(dev
);
835 struct pci_dev
*vga_dev
= vga_default_device();
838 return sprintf(buf
, "%u\n", (pdev
== vga_dev
));
840 return sprintf(buf
, "%u\n",
841 !!(pdev
->resource
[PCI_ROM_RESOURCE
].flags
&
842 IORESOURCE_ROM_SHADOW
));
844 static struct device_attribute vga_attr
= __ATTR_RO(boot_vga
);
846 static ssize_t
pci_read_config(struct file
*filp
, struct kobject
*kobj
,
847 struct bin_attribute
*bin_attr
, char *buf
,
848 loff_t off
, size_t count
)
850 struct pci_dev
*dev
= to_pci_dev(kobj_to_dev(kobj
));
851 unsigned int size
= 64;
852 loff_t init_off
= off
;
853 u8
*data
= (u8
*) buf
;
855 /* Several chips lock up trying to read undefined config space */
856 if (file_ns_capable(filp
, &init_user_ns
, CAP_SYS_ADMIN
))
857 size
= dev
->cfg_size
;
858 else if (dev
->hdr_type
== PCI_HEADER_TYPE_CARDBUS
)
863 if (off
+ count
> size
) {
870 pci_config_pm_runtime_get(dev
);
872 if ((off
& 1) && size
) {
874 pci_user_read_config_byte(dev
, off
, &val
);
875 data
[off
- init_off
] = val
;
880 if ((off
& 3) && size
> 2) {
882 pci_user_read_config_word(dev
, off
, &val
);
883 data
[off
- init_off
] = val
& 0xff;
884 data
[off
- init_off
+ 1] = (val
>> 8) & 0xff;
891 pci_user_read_config_dword(dev
, off
, &val
);
892 data
[off
- init_off
] = val
& 0xff;
893 data
[off
- init_off
+ 1] = (val
>> 8) & 0xff;
894 data
[off
- init_off
+ 2] = (val
>> 16) & 0xff;
895 data
[off
- init_off
+ 3] = (val
>> 24) & 0xff;
902 pci_user_read_config_word(dev
, off
, &val
);
903 data
[off
- init_off
] = val
& 0xff;
904 data
[off
- init_off
+ 1] = (val
>> 8) & 0xff;
911 pci_user_read_config_byte(dev
, off
, &val
);
912 data
[off
- init_off
] = val
;
917 pci_config_pm_runtime_put(dev
);
922 static ssize_t
pci_write_config(struct file
*filp
, struct kobject
*kobj
,
923 struct bin_attribute
*bin_attr
, char *buf
,
924 loff_t off
, size_t count
)
926 struct pci_dev
*dev
= to_pci_dev(kobj_to_dev(kobj
));
927 unsigned int size
= count
;
928 loff_t init_off
= off
;
929 u8
*data
= (u8
*) buf
;
931 if (kernel_is_locked_down("Direct PCI access"))
934 if (off
> dev
->cfg_size
)
936 if (off
+ count
> dev
->cfg_size
) {
937 size
= dev
->cfg_size
- off
;
941 pci_config_pm_runtime_get(dev
);
943 if ((off
& 1) && size
) {
944 pci_user_write_config_byte(dev
, off
, data
[off
- init_off
]);
949 if ((off
& 3) && size
> 2) {
950 u16 val
= data
[off
- init_off
];
951 val
|= (u16
) data
[off
- init_off
+ 1] << 8;
952 pci_user_write_config_word(dev
, off
, val
);
958 u32 val
= data
[off
- init_off
];
959 val
|= (u32
) data
[off
- init_off
+ 1] << 8;
960 val
|= (u32
) data
[off
- init_off
+ 2] << 16;
961 val
|= (u32
) data
[off
- init_off
+ 3] << 24;
962 pci_user_write_config_dword(dev
, off
, val
);
968 u16 val
= data
[off
- init_off
];
969 val
|= (u16
) data
[off
- init_off
+ 1] << 8;
970 pci_user_write_config_word(dev
, off
, val
);
976 pci_user_write_config_byte(dev
, off
, data
[off
- init_off
]);
981 pci_config_pm_runtime_put(dev
);
986 static ssize_t
read_vpd_attr(struct file
*filp
, struct kobject
*kobj
,
987 struct bin_attribute
*bin_attr
, char *buf
,
988 loff_t off
, size_t count
)
990 struct pci_dev
*dev
= to_pci_dev(kobj_to_dev(kobj
));
992 if (bin_attr
->size
> 0) {
993 if (off
> bin_attr
->size
)
995 else if (count
> bin_attr
->size
- off
)
996 count
= bin_attr
->size
- off
;
999 return pci_read_vpd(dev
, off
, count
, buf
);
1002 static ssize_t
write_vpd_attr(struct file
*filp
, struct kobject
*kobj
,
1003 struct bin_attribute
*bin_attr
, char *buf
,
1004 loff_t off
, size_t count
)
1006 struct pci_dev
*dev
= to_pci_dev(kobj_to_dev(kobj
));
1008 if (bin_attr
->size
> 0) {
1009 if (off
> bin_attr
->size
)
1011 else if (count
> bin_attr
->size
- off
)
1012 count
= bin_attr
->size
- off
;
1015 return pci_write_vpd(dev
, off
, count
, buf
);
1018 #ifdef HAVE_PCI_LEGACY
1020 * pci_read_legacy_io - read byte(s) from legacy I/O port space
1021 * @filp: open sysfs file
1022 * @kobj: kobject corresponding to file to read from
1023 * @bin_attr: struct bin_attribute for this file
1024 * @buf: buffer to store results
1025 * @off: offset into legacy I/O port space
1026 * @count: number of bytes to read
1028 * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific
1029 * callback routine (pci_legacy_read).
1031 static ssize_t
pci_read_legacy_io(struct file
*filp
, struct kobject
*kobj
,
1032 struct bin_attribute
*bin_attr
, char *buf
,
1033 loff_t off
, size_t count
)
1035 struct pci_bus
*bus
= to_pci_bus(kobj_to_dev(kobj
));
1037 /* Only support 1, 2 or 4 byte accesses */
1038 if (count
!= 1 && count
!= 2 && count
!= 4)
1041 return pci_legacy_read(bus
, off
, (u32
*)buf
, count
);
1045 * pci_write_legacy_io - write byte(s) to legacy I/O port space
1046 * @filp: open sysfs file
1047 * @kobj: kobject corresponding to file to read from
1048 * @bin_attr: struct bin_attribute for this file
1049 * @buf: buffer containing value to be written
1050 * @off: offset into legacy I/O port space
1051 * @count: number of bytes to write
1053 * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific
1054 * callback routine (pci_legacy_write).
1056 static ssize_t
pci_write_legacy_io(struct file
*filp
, struct kobject
*kobj
,
1057 struct bin_attribute
*bin_attr
, char *buf
,
1058 loff_t off
, size_t count
)
1060 struct pci_bus
*bus
= to_pci_bus(kobj_to_dev(kobj
));
1062 /* Only support 1, 2 or 4 byte accesses */
1063 if (count
!= 1 && count
!= 2 && count
!= 4)
1066 return pci_legacy_write(bus
, off
, *(u32
*)buf
, count
);
1070 * pci_mmap_legacy_mem - map legacy PCI memory into user memory space
1071 * @filp: open sysfs file
1072 * @kobj: kobject corresponding to device to be mapped
1073 * @attr: struct bin_attribute for this file
1074 * @vma: struct vm_area_struct passed to mmap
1076 * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap
1077 * legacy memory space (first meg of bus space) into application virtual
1080 static int pci_mmap_legacy_mem(struct file
*filp
, struct kobject
*kobj
,
1081 struct bin_attribute
*attr
,
1082 struct vm_area_struct
*vma
)
1084 struct pci_bus
*bus
= to_pci_bus(kobj_to_dev(kobj
));
1086 return pci_mmap_legacy_page_range(bus
, vma
, pci_mmap_mem
);
1090 * pci_mmap_legacy_io - map legacy PCI IO into user memory space
1091 * @filp: open sysfs file
1092 * @kobj: kobject corresponding to device to be mapped
1093 * @attr: struct bin_attribute for this file
1094 * @vma: struct vm_area_struct passed to mmap
1096 * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap
1097 * legacy IO space (first meg of bus space) into application virtual
1098 * memory space. Returns -ENOSYS if the operation isn't supported
1100 static int pci_mmap_legacy_io(struct file
*filp
, struct kobject
*kobj
,
1101 struct bin_attribute
*attr
,
1102 struct vm_area_struct
*vma
)
1104 struct pci_bus
*bus
= to_pci_bus(kobj_to_dev(kobj
));
1106 return pci_mmap_legacy_page_range(bus
, vma
, pci_mmap_io
);
1110 * pci_adjust_legacy_attr - adjustment of legacy file attributes
1111 * @b: bus to create files under
1112 * @mmap_type: I/O port or memory
1114 * Stub implementation. Can be overridden by arch if necessary.
1116 void __weak
pci_adjust_legacy_attr(struct pci_bus
*b
,
1117 enum pci_mmap_state mmap_type
)
1122 * pci_create_legacy_files - create legacy I/O port and memory files
1123 * @b: bus to create files under
1125 * Some platforms allow access to legacy I/O port and ISA memory space on
1126 * a per-bus basis. This routine creates the files and ties them into
1127 * their associated read, write and mmap files from pci-sysfs.c
1129 * On error unwind, but don't propagate the error to the caller
1130 * as it is ok to set up the PCI bus without these files.
1132 void pci_create_legacy_files(struct pci_bus
*b
)
1136 b
->legacy_io
= kzalloc(sizeof(struct bin_attribute
) * 2,
1141 sysfs_bin_attr_init(b
->legacy_io
);
1142 b
->legacy_io
->attr
.name
= "legacy_io";
1143 b
->legacy_io
->size
= 0xffff;
1144 b
->legacy_io
->attr
.mode
= S_IRUSR
| S_IWUSR
;
1145 b
->legacy_io
->read
= pci_read_legacy_io
;
1146 b
->legacy_io
->write
= pci_write_legacy_io
;
1147 b
->legacy_io
->mmap
= pci_mmap_legacy_io
;
1148 pci_adjust_legacy_attr(b
, pci_mmap_io
);
1149 error
= device_create_bin_file(&b
->dev
, b
->legacy_io
);
1153 /* Allocated above after the legacy_io struct */
1154 b
->legacy_mem
= b
->legacy_io
+ 1;
1155 sysfs_bin_attr_init(b
->legacy_mem
);
1156 b
->legacy_mem
->attr
.name
= "legacy_mem";
1157 b
->legacy_mem
->size
= 1024*1024;
1158 b
->legacy_mem
->attr
.mode
= S_IRUSR
| S_IWUSR
;
1159 b
->legacy_mem
->mmap
= pci_mmap_legacy_mem
;
1160 pci_adjust_legacy_attr(b
, pci_mmap_mem
);
1161 error
= device_create_bin_file(&b
->dev
, b
->legacy_mem
);
1163 goto legacy_mem_err
;
1168 device_remove_bin_file(&b
->dev
, b
->legacy_io
);
1170 kfree(b
->legacy_io
);
1171 b
->legacy_io
= NULL
;
1173 printk(KERN_WARNING
"pci: warning: could not create legacy I/O port and ISA memory resources to sysfs\n");
1177 void pci_remove_legacy_files(struct pci_bus
*b
)
1180 device_remove_bin_file(&b
->dev
, b
->legacy_io
);
1181 device_remove_bin_file(&b
->dev
, b
->legacy_mem
);
1182 kfree(b
->legacy_io
); /* both are allocated here */
1185 #endif /* HAVE_PCI_LEGACY */
1187 #if defined(HAVE_PCI_MMAP) || defined(ARCH_GENERIC_PCI_MMAP_RESOURCE)
1189 int pci_mmap_fits(struct pci_dev
*pdev
, int resno
, struct vm_area_struct
*vma
,
1190 enum pci_mmap_api mmap_api
)
1192 unsigned long nr
, start
, size
;
1193 resource_size_t pci_start
= 0, pci_end
;
1195 if (pci_resource_len(pdev
, resno
) == 0)
1197 nr
= vma_pages(vma
);
1198 start
= vma
->vm_pgoff
;
1199 size
= ((pci_resource_len(pdev
, resno
) - 1) >> PAGE_SHIFT
) + 1;
1200 if (mmap_api
== PCI_MMAP_PROCFS
) {
1201 pci_resource_to_user(pdev
, resno
, &pdev
->resource
[resno
],
1202 &pci_start
, &pci_end
);
1203 pci_start
>>= PAGE_SHIFT
;
1205 if (start
>= pci_start
&& start
< pci_start
+ size
&&
1206 start
+ nr
<= pci_start
+ size
)
1212 * pci_mmap_resource - map a PCI resource into user memory space
1213 * @kobj: kobject for mapping
1214 * @attr: struct bin_attribute for the file being mapped
1215 * @vma: struct vm_area_struct passed into the mmap
1216 * @write_combine: 1 for write_combine mapping
1218 * Use the regular PCI mapping routines to map a PCI resource into userspace.
1220 static int pci_mmap_resource(struct kobject
*kobj
, struct bin_attribute
*attr
,
1221 struct vm_area_struct
*vma
, int write_combine
)
1223 struct pci_dev
*pdev
= to_pci_dev(kobj_to_dev(kobj
));
1224 int bar
= (unsigned long)attr
->private;
1225 enum pci_mmap_state mmap_type
;
1226 struct resource
*res
= &pdev
->resource
[bar
];
1228 if (kernel_is_locked_down("Direct PCI access"))
1231 if (res
->flags
& IORESOURCE_MEM
&& iomem_is_exclusive(res
->start
))
1234 if (!pci_mmap_fits(pdev
, bar
, vma
, PCI_MMAP_SYSFS
)) {
1235 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",
1236 current
->comm
, vma
->vm_end
-vma
->vm_start
, vma
->vm_pgoff
,
1237 pci_name(pdev
), bar
,
1238 (u64
)pci_resource_start(pdev
, bar
),
1239 (u64
)pci_resource_len(pdev
, bar
));
1242 mmap_type
= res
->flags
& IORESOURCE_MEM
? pci_mmap_mem
: pci_mmap_io
;
1244 return pci_mmap_resource_range(pdev
, bar
, vma
, mmap_type
, write_combine
);
1247 static int pci_mmap_resource_uc(struct file
*filp
, struct kobject
*kobj
,
1248 struct bin_attribute
*attr
,
1249 struct vm_area_struct
*vma
)
1251 return pci_mmap_resource(kobj
, attr
, vma
, 0);
1254 static int pci_mmap_resource_wc(struct file
*filp
, struct kobject
*kobj
,
1255 struct bin_attribute
*attr
,
1256 struct vm_area_struct
*vma
)
1258 return pci_mmap_resource(kobj
, attr
, vma
, 1);
1261 static ssize_t
pci_resource_io(struct file
*filp
, struct kobject
*kobj
,
1262 struct bin_attribute
*attr
, char *buf
,
1263 loff_t off
, size_t count
, bool write
)
1265 struct pci_dev
*pdev
= to_pci_dev(kobj_to_dev(kobj
));
1266 int bar
= (unsigned long)attr
->private;
1267 unsigned long port
= off
;
1269 port
+= pci_resource_start(pdev
, bar
);
1271 if (port
> pci_resource_end(pdev
, bar
))
1274 if (port
+ count
- 1 > pci_resource_end(pdev
, bar
))
1280 outb(*(u8
*)buf
, port
);
1282 *(u8
*)buf
= inb(port
);
1286 outw(*(u16
*)buf
, port
);
1288 *(u16
*)buf
= inw(port
);
1292 outl(*(u32
*)buf
, port
);
1294 *(u32
*)buf
= inl(port
);
1300 static ssize_t
pci_read_resource_io(struct file
*filp
, struct kobject
*kobj
,
1301 struct bin_attribute
*attr
, char *buf
,
1302 loff_t off
, size_t count
)
1304 return pci_resource_io(filp
, kobj
, attr
, buf
, off
, count
, false);
1307 static ssize_t
pci_write_resource_io(struct file
*filp
, struct kobject
*kobj
,
1308 struct bin_attribute
*attr
, char *buf
,
1309 loff_t off
, size_t count
)
1311 if (kernel_is_locked_down("Direct PCI access"))
1314 return pci_resource_io(filp
, kobj
, attr
, buf
, off
, count
, true);
1318 * pci_remove_resource_files - cleanup resource files
1319 * @pdev: dev to cleanup
1321 * If we created resource files for @pdev, remove them from sysfs and
1322 * free their resources.
1324 static void pci_remove_resource_files(struct pci_dev
*pdev
)
1328 for (i
= 0; i
< PCI_ROM_RESOURCE
; i
++) {
1329 struct bin_attribute
*res_attr
;
1331 res_attr
= pdev
->res_attr
[i
];
1333 sysfs_remove_bin_file(&pdev
->dev
.kobj
, res_attr
);
1337 res_attr
= pdev
->res_attr_wc
[i
];
1339 sysfs_remove_bin_file(&pdev
->dev
.kobj
, res_attr
);
1345 static int pci_create_attr(struct pci_dev
*pdev
, int num
, int write_combine
)
1347 /* allocate attribute structure, piggyback attribute name */
1348 int name_len
= write_combine
? 13 : 10;
1349 struct bin_attribute
*res_attr
;
1350 char *res_attr_name
;
1353 res_attr
= kzalloc(sizeof(*res_attr
) + name_len
, GFP_ATOMIC
);
1357 res_attr_name
= (char *)(res_attr
+ 1);
1359 sysfs_bin_attr_init(res_attr
);
1360 if (write_combine
) {
1361 pdev
->res_attr_wc
[num
] = res_attr
;
1362 sprintf(res_attr_name
, "resource%d_wc", num
);
1363 res_attr
->mmap
= pci_mmap_resource_wc
;
1365 pdev
->res_attr
[num
] = res_attr
;
1366 sprintf(res_attr_name
, "resource%d", num
);
1367 if (pci_resource_flags(pdev
, num
) & IORESOURCE_IO
) {
1368 res_attr
->read
= pci_read_resource_io
;
1369 res_attr
->write
= pci_write_resource_io
;
1370 if (arch_can_pci_mmap_io())
1371 res_attr
->mmap
= pci_mmap_resource_uc
;
1373 res_attr
->mmap
= pci_mmap_resource_uc
;
1376 res_attr
->attr
.name
= res_attr_name
;
1377 res_attr
->attr
.mode
= S_IRUSR
| S_IWUSR
;
1378 res_attr
->size
= pci_resource_len(pdev
, num
);
1379 res_attr
->private = (void *)(unsigned long)num
;
1380 retval
= sysfs_create_bin_file(&pdev
->dev
.kobj
, res_attr
);
1388 * pci_create_resource_files - create resource files in sysfs for @dev
1389 * @pdev: dev in question
1391 * Walk the resources in @pdev creating files for each resource available.
1393 static int pci_create_resource_files(struct pci_dev
*pdev
)
1398 /* Expose the PCI resources from this device as files */
1399 for (i
= 0; i
< PCI_ROM_RESOURCE
; i
++) {
1401 /* skip empty resources */
1402 if (!pci_resource_len(pdev
, i
))
1405 retval
= pci_create_attr(pdev
, i
, 0);
1406 /* for prefetchable resources, create a WC mappable file */
1407 if (!retval
&& arch_can_pci_mmap_wc() &&
1408 pdev
->resource
[i
].flags
& IORESOURCE_PREFETCH
)
1409 retval
= pci_create_attr(pdev
, i
, 1);
1411 pci_remove_resource_files(pdev
);
1417 #else /* !HAVE_PCI_MMAP */
1418 int __weak
pci_create_resource_files(struct pci_dev
*dev
) { return 0; }
1419 void __weak
pci_remove_resource_files(struct pci_dev
*dev
) { return; }
1420 #endif /* HAVE_PCI_MMAP */
1423 * pci_write_rom - used to enable access to the PCI ROM display
1425 * @kobj: kernel object handle
1426 * @bin_attr: struct bin_attribute for this file
1429 * @count: number of byte in input
1431 * writing anything except 0 enables it
1433 static ssize_t
pci_write_rom(struct file
*filp
, struct kobject
*kobj
,
1434 struct bin_attribute
*bin_attr
, char *buf
,
1435 loff_t off
, size_t count
)
1437 struct pci_dev
*pdev
= to_pci_dev(kobj_to_dev(kobj
));
1439 if ((off
== 0) && (*buf
== '0') && (count
== 2))
1440 pdev
->rom_attr_enabled
= 0;
1442 pdev
->rom_attr_enabled
= 1;
1448 * pci_read_rom - read a PCI ROM
1450 * @kobj: kernel object handle
1451 * @bin_attr: struct bin_attribute for this file
1452 * @buf: where to put the data we read from the ROM
1454 * @count: number of bytes to read
1456 * Put @count bytes starting at @off into @buf from the ROM in the PCI
1457 * device corresponding to @kobj.
1459 static ssize_t
pci_read_rom(struct file
*filp
, struct kobject
*kobj
,
1460 struct bin_attribute
*bin_attr
, char *buf
,
1461 loff_t off
, size_t count
)
1463 struct pci_dev
*pdev
= to_pci_dev(kobj_to_dev(kobj
));
1467 if (!pdev
->rom_attr_enabled
)
1470 rom
= pci_map_rom(pdev
, &size
); /* size starts out as PCI window size */
1477 if (off
+ count
> size
)
1480 memcpy_fromio(buf
, rom
+ off
, count
);
1482 pci_unmap_rom(pdev
, rom
);
1487 static const struct bin_attribute pci_config_attr
= {
1490 .mode
= S_IRUGO
| S_IWUSR
,
1492 .size
= PCI_CFG_SPACE_SIZE
,
1493 .read
= pci_read_config
,
1494 .write
= pci_write_config
,
1497 static const struct bin_attribute pcie_config_attr
= {
1500 .mode
= S_IRUGO
| S_IWUSR
,
1502 .size
= PCI_CFG_SPACE_EXP_SIZE
,
1503 .read
= pci_read_config
,
1504 .write
= pci_write_config
,
1507 static ssize_t
reset_store(struct device
*dev
, struct device_attribute
*attr
,
1508 const char *buf
, size_t count
)
1510 struct pci_dev
*pdev
= to_pci_dev(dev
);
1512 ssize_t result
= kstrtoul(buf
, 0, &val
);
1520 result
= pci_reset_function(pdev
);
1527 static struct device_attribute reset_attr
= __ATTR(reset
, 0200, NULL
, reset_store
);
1529 static int pci_create_capabilities_sysfs(struct pci_dev
*dev
)
1532 struct bin_attribute
*attr
;
1534 /* If the device has VPD, try to expose it in sysfs. */
1536 attr
= kzalloc(sizeof(*attr
), GFP_ATOMIC
);
1540 sysfs_bin_attr_init(attr
);
1542 attr
->attr
.name
= "vpd";
1543 attr
->attr
.mode
= S_IRUSR
| S_IWUSR
;
1544 attr
->read
= read_vpd_attr
;
1545 attr
->write
= write_vpd_attr
;
1546 retval
= sysfs_create_bin_file(&dev
->dev
.kobj
, attr
);
1551 dev
->vpd
->attr
= attr
;
1554 /* Active State Power Management */
1555 pcie_aspm_create_sysfs_dev_files(dev
);
1557 if (!pci_probe_reset_function(dev
)) {
1558 retval
= device_create_file(&dev
->dev
, &reset_attr
);
1566 pcie_aspm_remove_sysfs_dev_files(dev
);
1567 if (dev
->vpd
&& dev
->vpd
->attr
) {
1568 sysfs_remove_bin_file(&dev
->dev
.kobj
, dev
->vpd
->attr
);
1569 kfree(dev
->vpd
->attr
);
1575 int __must_check
pci_create_sysfs_dev_files(struct pci_dev
*pdev
)
1579 struct bin_attribute
*attr
;
1581 if (!sysfs_initialized
)
1584 if (pdev
->cfg_size
> PCI_CFG_SPACE_SIZE
)
1585 retval
= sysfs_create_bin_file(&pdev
->dev
.kobj
, &pcie_config_attr
);
1587 retval
= sysfs_create_bin_file(&pdev
->dev
.kobj
, &pci_config_attr
);
1591 retval
= pci_create_resource_files(pdev
);
1593 goto err_config_file
;
1595 /* If the device has a ROM, try to expose it in sysfs. */
1596 rom_size
= pci_resource_len(pdev
, PCI_ROM_RESOURCE
);
1598 attr
= kzalloc(sizeof(*attr
), GFP_ATOMIC
);
1601 goto err_resource_files
;
1603 sysfs_bin_attr_init(attr
);
1604 attr
->size
= rom_size
;
1605 attr
->attr
.name
= "rom";
1606 attr
->attr
.mode
= S_IRUSR
| S_IWUSR
;
1607 attr
->read
= pci_read_rom
;
1608 attr
->write
= pci_write_rom
;
1609 retval
= sysfs_create_bin_file(&pdev
->dev
.kobj
, attr
);
1612 goto err_resource_files
;
1614 pdev
->rom_attr
= attr
;
1617 /* add sysfs entries for various capabilities */
1618 retval
= pci_create_capabilities_sysfs(pdev
);
1622 pci_create_firmware_label_files(pdev
);
1627 if (pdev
->rom_attr
) {
1628 sysfs_remove_bin_file(&pdev
->dev
.kobj
, pdev
->rom_attr
);
1629 kfree(pdev
->rom_attr
);
1630 pdev
->rom_attr
= NULL
;
1633 pci_remove_resource_files(pdev
);
1635 if (pdev
->cfg_size
> PCI_CFG_SPACE_SIZE
)
1636 sysfs_remove_bin_file(&pdev
->dev
.kobj
, &pcie_config_attr
);
1638 sysfs_remove_bin_file(&pdev
->dev
.kobj
, &pci_config_attr
);
1643 static void pci_remove_capabilities_sysfs(struct pci_dev
*dev
)
1645 if (dev
->vpd
&& dev
->vpd
->attr
) {
1646 sysfs_remove_bin_file(&dev
->dev
.kobj
, dev
->vpd
->attr
);
1647 kfree(dev
->vpd
->attr
);
1650 pcie_aspm_remove_sysfs_dev_files(dev
);
1651 if (dev
->reset_fn
) {
1652 device_remove_file(&dev
->dev
, &reset_attr
);
1658 * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files
1659 * @pdev: device whose entries we should free
1661 * Cleanup when @pdev is removed from sysfs.
1663 void pci_remove_sysfs_dev_files(struct pci_dev
*pdev
)
1665 if (!sysfs_initialized
)
1668 pci_remove_capabilities_sysfs(pdev
);
1670 if (pdev
->cfg_size
> PCI_CFG_SPACE_SIZE
)
1671 sysfs_remove_bin_file(&pdev
->dev
.kobj
, &pcie_config_attr
);
1673 sysfs_remove_bin_file(&pdev
->dev
.kobj
, &pci_config_attr
);
1675 pci_remove_resource_files(pdev
);
1677 if (pdev
->rom_attr
) {
1678 sysfs_remove_bin_file(&pdev
->dev
.kobj
, pdev
->rom_attr
);
1679 kfree(pdev
->rom_attr
);
1680 pdev
->rom_attr
= NULL
;
1683 pci_remove_firmware_label_files(pdev
);
1686 static int __init
pci_sysfs_init(void)
1688 struct pci_dev
*pdev
= NULL
;
1691 sysfs_initialized
= 1;
1692 for_each_pci_dev(pdev
) {
1693 retval
= pci_create_sysfs_dev_files(pdev
);
1702 late_initcall(pci_sysfs_init
);
1704 static struct attribute
*pci_dev_dev_attrs
[] = {
1709 static umode_t
pci_dev_attrs_are_visible(struct kobject
*kobj
,
1710 struct attribute
*a
, int n
)
1712 struct device
*dev
= kobj_to_dev(kobj
);
1713 struct pci_dev
*pdev
= to_pci_dev(dev
);
1715 if (a
== &vga_attr
.attr
)
1716 if ((pdev
->class >> 8) != PCI_CLASS_DISPLAY_VGA
)
1722 static struct attribute
*pci_dev_hp_attrs
[] = {
1723 &dev_remove_attr
.attr
,
1724 &dev_rescan_attr
.attr
,
1728 static umode_t
pci_dev_hp_attrs_are_visible(struct kobject
*kobj
,
1729 struct attribute
*a
, int n
)
1731 struct device
*dev
= kobj_to_dev(kobj
);
1732 struct pci_dev
*pdev
= to_pci_dev(dev
);
1734 if (pdev
->is_virtfn
)
1740 static umode_t
pci_bridge_attrs_are_visible(struct kobject
*kobj
,
1741 struct attribute
*a
, int n
)
1743 struct device
*dev
= kobj_to_dev(kobj
);
1744 struct pci_dev
*pdev
= to_pci_dev(dev
);
1746 if (pci_is_bridge(pdev
))
1752 static umode_t
pcie_dev_attrs_are_visible(struct kobject
*kobj
,
1753 struct attribute
*a
, int n
)
1755 struct device
*dev
= kobj_to_dev(kobj
);
1756 struct pci_dev
*pdev
= to_pci_dev(dev
);
1758 if (pci_is_pcie(pdev
))
1764 static const struct attribute_group pci_dev_group
= {
1765 .attrs
= pci_dev_attrs
,
1768 const struct attribute_group
*pci_dev_groups
[] = {
1773 static const struct attribute_group pci_bridge_group
= {
1774 .attrs
= pci_bridge_attrs
,
1777 const struct attribute_group
*pci_bridge_groups
[] = {
1782 static const struct attribute_group pcie_dev_group
= {
1783 .attrs
= pcie_dev_attrs
,
1786 const struct attribute_group
*pcie_dev_groups
[] = {
1791 static const struct attribute_group pci_dev_hp_attr_group
= {
1792 .attrs
= pci_dev_hp_attrs
,
1793 .is_visible
= pci_dev_hp_attrs_are_visible
,
1796 #ifdef CONFIG_PCI_IOV
1797 static struct attribute
*sriov_dev_attrs
[] = {
1798 &sriov_totalvfs_attr
.attr
,
1799 &sriov_numvfs_attr
.attr
,
1800 &sriov_offset_attr
.attr
,
1801 &sriov_stride_attr
.attr
,
1802 &sriov_vf_device_attr
.attr
,
1803 &sriov_drivers_autoprobe_attr
.attr
,
1807 static umode_t
sriov_attrs_are_visible(struct kobject
*kobj
,
1808 struct attribute
*a
, int n
)
1810 struct device
*dev
= kobj_to_dev(kobj
);
1812 if (!dev_is_pf(dev
))
1818 static const struct attribute_group sriov_dev_attr_group
= {
1819 .attrs
= sriov_dev_attrs
,
1820 .is_visible
= sriov_attrs_are_visible
,
1822 #endif /* CONFIG_PCI_IOV */
1824 static const struct attribute_group pci_dev_attr_group
= {
1825 .attrs
= pci_dev_dev_attrs
,
1826 .is_visible
= pci_dev_attrs_are_visible
,
1829 static const struct attribute_group pci_bridge_attr_group
= {
1830 .attrs
= pci_bridge_attrs
,
1831 .is_visible
= pci_bridge_attrs_are_visible
,
1834 static const struct attribute_group pcie_dev_attr_group
= {
1835 .attrs
= pcie_dev_attrs
,
1836 .is_visible
= pcie_dev_attrs_are_visible
,
1839 static const struct attribute_group
*pci_dev_attr_groups
[] = {
1840 &pci_dev_attr_group
,
1841 &pci_dev_hp_attr_group
,
1842 #ifdef CONFIG_PCI_IOV
1843 &sriov_dev_attr_group
,
1845 &pci_bridge_attr_group
,
1846 &pcie_dev_attr_group
,
1850 const struct device_type pci_dev_type
= {
1851 .groups
= pci_dev_attr_groups
,