2 * drivers/pci/pci-sysfs.c
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>
11 * File attributes for PCI devices
13 * Modeled after usb's driverfs.c
18 #include <linux/kernel.h>
19 #include <linux/sched.h>
20 #include <linux/pci.h>
21 #include <linux/stat.h>
22 #include <linux/topology.h>
24 #include <linux/capability.h>
25 #include <linux/pci-aspm.h>
28 static int sysfs_initialized
; /* = 0 */
30 /* show configuration fields */
31 #define pci_config_attr(field, format_string) \
33 field##_show(struct device *dev, struct device_attribute *attr, char *buf) \
35 struct pci_dev *pdev; \
37 pdev = to_pci_dev (dev); \
38 return sprintf (buf, format_string, pdev->field); \
41 pci_config_attr(vendor
, "0x%04x\n");
42 pci_config_attr(device
, "0x%04x\n");
43 pci_config_attr(subsystem_vendor
, "0x%04x\n");
44 pci_config_attr(subsystem_device
, "0x%04x\n");
45 pci_config_attr(class, "0x%06x\n");
46 pci_config_attr(irq
, "%u\n");
48 static ssize_t
broken_parity_status_show(struct device
*dev
,
49 struct device_attribute
*attr
,
52 struct pci_dev
*pdev
= to_pci_dev(dev
);
53 return sprintf (buf
, "%u\n", pdev
->broken_parity_status
);
56 static ssize_t
broken_parity_status_store(struct device
*dev
,
57 struct device_attribute
*attr
,
58 const char *buf
, size_t count
)
60 struct pci_dev
*pdev
= to_pci_dev(dev
);
63 if (strict_strtoul(buf
, 0, &val
) < 0)
66 pdev
->broken_parity_status
= !!val
;
71 static ssize_t
local_cpus_show(struct device
*dev
,
72 struct device_attribute
*attr
, char *buf
)
74 const struct cpumask
*mask
;
77 mask
= cpumask_of_pcibus(to_pci_dev(dev
)->bus
);
78 len
= cpumask_scnprintf(buf
, PAGE_SIZE
-2, mask
);
85 static ssize_t
local_cpulist_show(struct device
*dev
,
86 struct device_attribute
*attr
, char *buf
)
88 const struct cpumask
*mask
;
91 mask
= cpumask_of_pcibus(to_pci_dev(dev
)->bus
);
92 len
= cpulist_scnprintf(buf
, PAGE_SIZE
-2, mask
);
100 resource_show(struct device
* dev
, struct device_attribute
*attr
, char * buf
)
102 struct pci_dev
* pci_dev
= to_pci_dev(dev
);
106 resource_size_t start
, end
;
108 if (pci_dev
->subordinate
)
109 max
= DEVICE_COUNT_RESOURCE
;
111 max
= PCI_BRIDGE_RESOURCES
;
113 for (i
= 0; i
< max
; i
++) {
114 struct resource
*res
= &pci_dev
->resource
[i
];
115 pci_resource_to_user(pci_dev
, i
, res
, &start
, &end
);
116 str
+= sprintf(str
,"0x%016llx 0x%016llx 0x%016llx\n",
117 (unsigned long long)start
,
118 (unsigned long long)end
,
119 (unsigned long long)res
->flags
);
124 static ssize_t
modalias_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
126 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
128 return sprintf(buf
, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n",
129 pci_dev
->vendor
, pci_dev
->device
,
130 pci_dev
->subsystem_vendor
, pci_dev
->subsystem_device
,
131 (u8
)(pci_dev
->class >> 16), (u8
)(pci_dev
->class >> 8),
132 (u8
)(pci_dev
->class));
135 static ssize_t
is_enabled_store(struct device
*dev
,
136 struct device_attribute
*attr
, const char *buf
,
139 struct pci_dev
*pdev
= to_pci_dev(dev
);
141 ssize_t result
= strict_strtoul(buf
, 0, &val
);
146 /* this can crash the machine when done on the "wrong" device */
147 if (!capable(CAP_SYS_ADMIN
))
151 if (atomic_read(&pdev
->enable_cnt
) != 0)
152 pci_disable_device(pdev
);
156 result
= pci_enable_device(pdev
);
158 return result
< 0 ? result
: count
;
161 static ssize_t
is_enabled_show(struct device
*dev
,
162 struct device_attribute
*attr
, char *buf
)
164 struct pci_dev
*pdev
;
166 pdev
= to_pci_dev (dev
);
167 return sprintf (buf
, "%u\n", atomic_read(&pdev
->enable_cnt
));
172 numa_node_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
174 return sprintf (buf
, "%d\n", dev
->numa_node
);
179 msi_bus_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
181 struct pci_dev
*pdev
= to_pci_dev(dev
);
183 if (!pdev
->subordinate
)
186 return sprintf (buf
, "%u\n",
187 !(pdev
->subordinate
->bus_flags
& PCI_BUS_FLAGS_NO_MSI
));
191 msi_bus_store(struct device
*dev
, struct device_attribute
*attr
,
192 const char *buf
, size_t count
)
194 struct pci_dev
*pdev
= to_pci_dev(dev
);
197 if (strict_strtoul(buf
, 0, &val
) < 0)
200 /* bad things may happen if the no_msi flag is changed
201 * while some drivers are loaded */
202 if (!capable(CAP_SYS_ADMIN
))
205 /* Maybe pci devices without subordinate busses shouldn't even have this
206 * attribute in the first place? */
207 if (!pdev
->subordinate
)
210 /* Is the flag going to change, or keep the value it already had? */
211 if (!(pdev
->subordinate
->bus_flags
& PCI_BUS_FLAGS_NO_MSI
) ^
213 pdev
->subordinate
->bus_flags
^= PCI_BUS_FLAGS_NO_MSI
;
215 dev_warn(&pdev
->dev
, "forced subordinate bus to%s support MSI,"
216 " bad things could happen\n", val
? "" : " not");
222 struct device_attribute pci_dev_attrs
[] = {
226 __ATTR_RO(subsystem_vendor
),
227 __ATTR_RO(subsystem_device
),
230 __ATTR_RO(local_cpus
),
231 __ATTR_RO(local_cpulist
),
234 __ATTR_RO(numa_node
),
236 __ATTR(enable
, 0600, is_enabled_show
, is_enabled_store
),
237 __ATTR(broken_parity_status
,(S_IRUGO
|S_IWUSR
),
238 broken_parity_status_show
,broken_parity_status_store
),
239 __ATTR(msi_bus
, 0644, msi_bus_show
, msi_bus_store
),
244 boot_vga_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
246 struct pci_dev
*pdev
= to_pci_dev(dev
);
248 return sprintf(buf
, "%u\n",
249 !!(pdev
->resource
[PCI_ROM_RESOURCE
].flags
&
250 IORESOURCE_ROM_SHADOW
));
252 struct device_attribute vga_attr
= __ATTR_RO(boot_vga
);
255 pci_read_config(struct kobject
*kobj
, struct bin_attribute
*bin_attr
,
256 char *buf
, loff_t off
, size_t count
)
258 struct pci_dev
*dev
= to_pci_dev(container_of(kobj
,struct device
,kobj
));
259 unsigned int size
= 64;
260 loff_t init_off
= off
;
261 u8
*data
= (u8
*) buf
;
263 /* Several chips lock up trying to read undefined config space */
264 if (capable(CAP_SYS_ADMIN
)) {
265 size
= dev
->cfg_size
;
266 } else if (dev
->hdr_type
== PCI_HEADER_TYPE_CARDBUS
) {
272 if (off
+ count
> size
) {
279 if ((off
& 1) && size
) {
281 pci_user_read_config_byte(dev
, off
, &val
);
282 data
[off
- init_off
] = val
;
287 if ((off
& 3) && size
> 2) {
289 pci_user_read_config_word(dev
, off
, &val
);
290 data
[off
- init_off
] = val
& 0xff;
291 data
[off
- init_off
+ 1] = (val
>> 8) & 0xff;
298 pci_user_read_config_dword(dev
, off
, &val
);
299 data
[off
- init_off
] = val
& 0xff;
300 data
[off
- init_off
+ 1] = (val
>> 8) & 0xff;
301 data
[off
- init_off
+ 2] = (val
>> 16) & 0xff;
302 data
[off
- init_off
+ 3] = (val
>> 24) & 0xff;
309 pci_user_read_config_word(dev
, off
, &val
);
310 data
[off
- init_off
] = val
& 0xff;
311 data
[off
- init_off
+ 1] = (val
>> 8) & 0xff;
318 pci_user_read_config_byte(dev
, off
, &val
);
319 data
[off
- init_off
] = val
;
328 pci_write_config(struct kobject
*kobj
, struct bin_attribute
*bin_attr
,
329 char *buf
, loff_t off
, size_t count
)
331 struct pci_dev
*dev
= to_pci_dev(container_of(kobj
,struct device
,kobj
));
332 unsigned int size
= count
;
333 loff_t init_off
= off
;
334 u8
*data
= (u8
*) buf
;
336 if (off
> dev
->cfg_size
)
338 if (off
+ count
> dev
->cfg_size
) {
339 size
= dev
->cfg_size
- off
;
343 if ((off
& 1) && size
) {
344 pci_user_write_config_byte(dev
, off
, data
[off
- init_off
]);
349 if ((off
& 3) && size
> 2) {
350 u16 val
= data
[off
- init_off
];
351 val
|= (u16
) data
[off
- init_off
+ 1] << 8;
352 pci_user_write_config_word(dev
, off
, val
);
358 u32 val
= data
[off
- init_off
];
359 val
|= (u32
) data
[off
- init_off
+ 1] << 8;
360 val
|= (u32
) data
[off
- init_off
+ 2] << 16;
361 val
|= (u32
) data
[off
- init_off
+ 3] << 24;
362 pci_user_write_config_dword(dev
, off
, val
);
368 u16 val
= data
[off
- init_off
];
369 val
|= (u16
) data
[off
- init_off
+ 1] << 8;
370 pci_user_write_config_word(dev
, off
, val
);
376 pci_user_write_config_byte(dev
, off
, data
[off
- init_off
]);
385 read_vpd_attr(struct kobject
*kobj
, struct bin_attribute
*bin_attr
,
386 char *buf
, loff_t off
, size_t count
)
388 struct pci_dev
*dev
=
389 to_pci_dev(container_of(kobj
, struct device
, kobj
));
391 if (off
> bin_attr
->size
)
393 else if (count
> bin_attr
->size
- off
)
394 count
= bin_attr
->size
- off
;
396 return pci_read_vpd(dev
, off
, count
, buf
);
400 write_vpd_attr(struct kobject
*kobj
, struct bin_attribute
*bin_attr
,
401 char *buf
, loff_t off
, size_t count
)
403 struct pci_dev
*dev
=
404 to_pci_dev(container_of(kobj
, struct device
, kobj
));
406 if (off
> bin_attr
->size
)
408 else if (count
> bin_attr
->size
- off
)
409 count
= bin_attr
->size
- off
;
411 return pci_write_vpd(dev
, off
, count
, buf
);
414 #ifdef HAVE_PCI_LEGACY
416 * pci_read_legacy_io - read byte(s) from legacy I/O port space
417 * @kobj: kobject corresponding to file to read from
418 * @buf: buffer to store results
419 * @off: offset into legacy I/O port space
420 * @count: number of bytes to read
422 * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific
423 * callback routine (pci_legacy_read).
426 pci_read_legacy_io(struct kobject
*kobj
, struct bin_attribute
*bin_attr
,
427 char *buf
, loff_t off
, size_t count
)
429 struct pci_bus
*bus
= to_pci_bus(container_of(kobj
,
433 /* Only support 1, 2 or 4 byte accesses */
434 if (count
!= 1 && count
!= 2 && count
!= 4)
437 return pci_legacy_read(bus
, off
, (u32
*)buf
, count
);
441 * pci_write_legacy_io - write byte(s) to legacy I/O port space
442 * @kobj: kobject corresponding to file to read from
443 * @buf: buffer containing value to be written
444 * @off: offset into legacy I/O port space
445 * @count: number of bytes to write
447 * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific
448 * callback routine (pci_legacy_write).
451 pci_write_legacy_io(struct kobject
*kobj
, struct bin_attribute
*bin_attr
,
452 char *buf
, loff_t off
, size_t count
)
454 struct pci_bus
*bus
= to_pci_bus(container_of(kobj
,
457 /* Only support 1, 2 or 4 byte accesses */
458 if (count
!= 1 && count
!= 2 && count
!= 4)
461 return pci_legacy_write(bus
, off
, *(u32
*)buf
, count
);
465 * pci_mmap_legacy_mem - map legacy PCI memory into user memory space
466 * @kobj: kobject corresponding to device to be mapped
467 * @attr: struct bin_attribute for this file
468 * @vma: struct vm_area_struct passed to mmap
470 * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap
471 * legacy memory space (first meg of bus space) into application virtual
475 pci_mmap_legacy_mem(struct kobject
*kobj
, struct bin_attribute
*attr
,
476 struct vm_area_struct
*vma
)
478 struct pci_bus
*bus
= to_pci_bus(container_of(kobj
,
482 return pci_mmap_legacy_page_range(bus
, vma
, pci_mmap_mem
);
486 * pci_mmap_legacy_io - map legacy PCI IO into user memory space
487 * @kobj: kobject corresponding to device to be mapped
488 * @attr: struct bin_attribute for this file
489 * @vma: struct vm_area_struct passed to mmap
491 * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap
492 * legacy IO space (first meg of bus space) into application virtual
493 * memory space. Returns -ENOSYS if the operation isn't supported
496 pci_mmap_legacy_io(struct kobject
*kobj
, struct bin_attribute
*attr
,
497 struct vm_area_struct
*vma
)
499 struct pci_bus
*bus
= to_pci_bus(container_of(kobj
,
503 return pci_mmap_legacy_page_range(bus
, vma
, pci_mmap_io
);
507 * pci_adjust_legacy_attr - adjustment of legacy file attributes
508 * @b: bus to create files under
509 * @mmap_type: I/O port or memory
511 * Stub implementation. Can be overridden by arch if necessary.
514 pci_adjust_legacy_attr(struct pci_bus
*b
, enum pci_mmap_state mmap_type
)
520 * pci_create_legacy_files - create legacy I/O port and memory files
521 * @b: bus to create files under
523 * Some platforms allow access to legacy I/O port and ISA memory space on
524 * a per-bus basis. This routine creates the files and ties them into
525 * their associated read, write and mmap files from pci-sysfs.c
527 * On error unwind, but don't propogate the error to the caller
528 * as it is ok to set up the PCI bus without these files.
530 void pci_create_legacy_files(struct pci_bus
*b
)
534 b
->legacy_io
= kzalloc(sizeof(struct bin_attribute
) * 2,
539 b
->legacy_io
->attr
.name
= "legacy_io";
540 b
->legacy_io
->size
= 0xffff;
541 b
->legacy_io
->attr
.mode
= S_IRUSR
| S_IWUSR
;
542 b
->legacy_io
->read
= pci_read_legacy_io
;
543 b
->legacy_io
->write
= pci_write_legacy_io
;
544 b
->legacy_io
->mmap
= pci_mmap_legacy_io
;
545 pci_adjust_legacy_attr(b
, pci_mmap_io
);
546 error
= device_create_bin_file(&b
->dev
, b
->legacy_io
);
550 /* Allocated above after the legacy_io struct */
551 b
->legacy_mem
= b
->legacy_io
+ 1;
552 b
->legacy_mem
->attr
.name
= "legacy_mem";
553 b
->legacy_mem
->size
= 1024*1024;
554 b
->legacy_mem
->attr
.mode
= S_IRUSR
| S_IWUSR
;
555 b
->legacy_mem
->mmap
= pci_mmap_legacy_mem
;
556 pci_adjust_legacy_attr(b
, pci_mmap_mem
);
557 error
= device_create_bin_file(&b
->dev
, b
->legacy_mem
);
564 device_remove_bin_file(&b
->dev
, b
->legacy_io
);
569 printk(KERN_WARNING
"pci: warning: could not create legacy I/O port "
570 "and ISA memory resources to sysfs\n");
574 void pci_remove_legacy_files(struct pci_bus
*b
)
577 device_remove_bin_file(&b
->dev
, b
->legacy_io
);
578 device_remove_bin_file(&b
->dev
, b
->legacy_mem
);
579 kfree(b
->legacy_io
); /* both are allocated here */
582 #endif /* HAVE_PCI_LEGACY */
586 int pci_mmap_fits(struct pci_dev
*pdev
, int resno
, struct vm_area_struct
*vma
)
588 unsigned long nr
, start
, size
;
590 nr
= (vma
->vm_end
- vma
->vm_start
) >> PAGE_SHIFT
;
591 start
= vma
->vm_pgoff
;
592 size
= ((pci_resource_len(pdev
, resno
) - 1) >> PAGE_SHIFT
) + 1;
593 if (start
< size
&& size
- start
>= nr
)
595 WARN(1, "process \"%s\" tried to map 0x%08lx-0x%08lx on %s BAR %d (size 0x%08lx)\n",
596 current
->comm
, start
, start
+nr
, pci_name(pdev
), resno
, size
);
601 * pci_mmap_resource - map a PCI resource into user memory space
602 * @kobj: kobject for mapping
603 * @attr: struct bin_attribute for the file being mapped
604 * @vma: struct vm_area_struct passed into the mmap
605 * @write_combine: 1 for write_combine mapping
607 * Use the regular PCI mapping routines to map a PCI resource into userspace.
610 pci_mmap_resource(struct kobject
*kobj
, struct bin_attribute
*attr
,
611 struct vm_area_struct
*vma
, int write_combine
)
613 struct pci_dev
*pdev
= to_pci_dev(container_of(kobj
,
614 struct device
, kobj
));
615 struct resource
*res
= (struct resource
*)attr
->private;
616 enum pci_mmap_state mmap_type
;
617 resource_size_t start
, end
;
620 for (i
= 0; i
< PCI_ROM_RESOURCE
; i
++)
621 if (res
== &pdev
->resource
[i
])
623 if (i
>= PCI_ROM_RESOURCE
)
626 if (!pci_mmap_fits(pdev
, i
, vma
))
629 /* pci_mmap_page_range() expects the same kind of entry as coming
630 * from /proc/bus/pci/ which is a "user visible" value. If this is
631 * different from the resource itself, arch will do necessary fixup.
633 pci_resource_to_user(pdev
, i
, res
, &start
, &end
);
634 vma
->vm_pgoff
+= start
>> PAGE_SHIFT
;
635 mmap_type
= res
->flags
& IORESOURCE_MEM
? pci_mmap_mem
: pci_mmap_io
;
637 if (res
->flags
& IORESOURCE_MEM
&& iomem_is_exclusive(start
))
640 return pci_mmap_page_range(pdev
, vma
, mmap_type
, write_combine
);
644 pci_mmap_resource_uc(struct kobject
*kobj
, struct bin_attribute
*attr
,
645 struct vm_area_struct
*vma
)
647 return pci_mmap_resource(kobj
, attr
, vma
, 0);
651 pci_mmap_resource_wc(struct kobject
*kobj
, struct bin_attribute
*attr
,
652 struct vm_area_struct
*vma
)
654 return pci_mmap_resource(kobj
, attr
, vma
, 1);
658 * pci_remove_resource_files - cleanup resource files
659 * @dev: dev to cleanup
661 * If we created resource files for @dev, remove them from sysfs and
662 * free their resources.
665 pci_remove_resource_files(struct pci_dev
*pdev
)
669 for (i
= 0; i
< PCI_ROM_RESOURCE
; i
++) {
670 struct bin_attribute
*res_attr
;
672 res_attr
= pdev
->res_attr
[i
];
674 sysfs_remove_bin_file(&pdev
->dev
.kobj
, res_attr
);
678 res_attr
= pdev
->res_attr_wc
[i
];
680 sysfs_remove_bin_file(&pdev
->dev
.kobj
, res_attr
);
686 static int pci_create_attr(struct pci_dev
*pdev
, int num
, int write_combine
)
688 /* allocate attribute structure, piggyback attribute name */
689 int name_len
= write_combine
? 13 : 10;
690 struct bin_attribute
*res_attr
;
693 res_attr
= kzalloc(sizeof(*res_attr
) + name_len
, GFP_ATOMIC
);
695 char *res_attr_name
= (char *)(res_attr
+ 1);
698 pdev
->res_attr_wc
[num
] = res_attr
;
699 sprintf(res_attr_name
, "resource%d_wc", num
);
700 res_attr
->mmap
= pci_mmap_resource_wc
;
702 pdev
->res_attr
[num
] = res_attr
;
703 sprintf(res_attr_name
, "resource%d", num
);
704 res_attr
->mmap
= pci_mmap_resource_uc
;
706 res_attr
->attr
.name
= res_attr_name
;
707 res_attr
->attr
.mode
= S_IRUSR
| S_IWUSR
;
708 res_attr
->size
= pci_resource_len(pdev
, num
);
709 res_attr
->private = &pdev
->resource
[num
];
710 retval
= sysfs_create_bin_file(&pdev
->dev
.kobj
, res_attr
);
718 * pci_create_resource_files - create resource files in sysfs for @dev
719 * @dev: dev in question
721 * Walk the resources in @dev creating files for each resource available.
723 static int pci_create_resource_files(struct pci_dev
*pdev
)
728 /* Expose the PCI resources from this device as files */
729 for (i
= 0; i
< PCI_ROM_RESOURCE
; i
++) {
731 /* skip empty resources */
732 if (!pci_resource_len(pdev
, i
))
735 retval
= pci_create_attr(pdev
, i
, 0);
736 /* for prefetchable resources, create a WC mappable file */
737 if (!retval
&& pdev
->resource
[i
].flags
& IORESOURCE_PREFETCH
)
738 retval
= pci_create_attr(pdev
, i
, 1);
741 pci_remove_resource_files(pdev
);
747 #else /* !HAVE_PCI_MMAP */
748 int __weak
pci_create_resource_files(struct pci_dev
*dev
) { return 0; }
749 void __weak
pci_remove_resource_files(struct pci_dev
*dev
) { return; }
750 #endif /* HAVE_PCI_MMAP */
753 * pci_write_rom - used to enable access to the PCI ROM display
754 * @kobj: kernel object handle
757 * @count: number of byte in input
759 * writing anything except 0 enables it
762 pci_write_rom(struct kobject
*kobj
, struct bin_attribute
*bin_attr
,
763 char *buf
, loff_t off
, size_t count
)
765 struct pci_dev
*pdev
= to_pci_dev(container_of(kobj
, struct device
, kobj
));
767 if ((off
== 0) && (*buf
== '0') && (count
== 2))
768 pdev
->rom_attr_enabled
= 0;
770 pdev
->rom_attr_enabled
= 1;
776 * pci_read_rom - read a PCI ROM
777 * @kobj: kernel object handle
778 * @buf: where to put the data we read from the ROM
780 * @count: number of bytes to read
782 * Put @count bytes starting at @off into @buf from the ROM in the PCI
783 * device corresponding to @kobj.
786 pci_read_rom(struct kobject
*kobj
, struct bin_attribute
*bin_attr
,
787 char *buf
, loff_t off
, size_t count
)
789 struct pci_dev
*pdev
= to_pci_dev(container_of(kobj
, struct device
, kobj
));
793 if (!pdev
->rom_attr_enabled
)
796 rom
= pci_map_rom(pdev
, &size
); /* size starts out as PCI window size */
803 if (off
+ count
> size
)
806 memcpy_fromio(buf
, rom
+ off
, count
);
808 pci_unmap_rom(pdev
, rom
);
813 static struct bin_attribute pci_config_attr
= {
816 .mode
= S_IRUGO
| S_IWUSR
,
818 .size
= PCI_CFG_SPACE_SIZE
,
819 .read
= pci_read_config
,
820 .write
= pci_write_config
,
823 static struct bin_attribute pcie_config_attr
= {
826 .mode
= S_IRUGO
| S_IWUSR
,
828 .size
= PCI_CFG_SPACE_EXP_SIZE
,
829 .read
= pci_read_config
,
830 .write
= pci_write_config
,
833 int __attribute__ ((weak
)) pcibios_add_platform_entries(struct pci_dev
*dev
)
838 static int pci_create_capabilities_sysfs(struct pci_dev
*dev
)
841 struct bin_attribute
*attr
;
843 /* If the device has VPD, try to expose it in sysfs. */
845 attr
= kzalloc(sizeof(*attr
), GFP_ATOMIC
);
849 attr
->size
= dev
->vpd
->len
;
850 attr
->attr
.name
= "vpd";
851 attr
->attr
.mode
= S_IRUSR
| S_IWUSR
;
852 attr
->read
= read_vpd_attr
;
853 attr
->write
= write_vpd_attr
;
854 retval
= sysfs_create_bin_file(&dev
->dev
.kobj
, attr
);
856 kfree(dev
->vpd
->attr
);
859 dev
->vpd
->attr
= attr
;
862 /* Active State Power Management */
863 pcie_aspm_create_sysfs_dev_files(dev
);
868 int __must_check
pci_create_sysfs_dev_files (struct pci_dev
*pdev
)
872 struct bin_attribute
*attr
;
874 if (!sysfs_initialized
)
877 if (pdev
->cfg_size
< PCI_CFG_SPACE_EXP_SIZE
)
878 retval
= sysfs_create_bin_file(&pdev
->dev
.kobj
, &pci_config_attr
);
880 retval
= sysfs_create_bin_file(&pdev
->dev
.kobj
, &pcie_config_attr
);
884 retval
= pci_create_resource_files(pdev
);
886 goto err_config_file
;
888 if (pci_resource_len(pdev
, PCI_ROM_RESOURCE
))
889 rom_size
= pci_resource_len(pdev
, PCI_ROM_RESOURCE
);
890 else if (pdev
->resource
[PCI_ROM_RESOURCE
].flags
& IORESOURCE_ROM_SHADOW
)
893 /* If the device has a ROM, try to expose it in sysfs. */
895 attr
= kzalloc(sizeof(*attr
), GFP_ATOMIC
);
898 goto err_resource_files
;
900 attr
->size
= rom_size
;
901 attr
->attr
.name
= "rom";
902 attr
->attr
.mode
= S_IRUSR
;
903 attr
->read
= pci_read_rom
;
904 attr
->write
= pci_write_rom
;
905 retval
= sysfs_create_bin_file(&pdev
->dev
.kobj
, attr
);
908 goto err_resource_files
;
910 pdev
->rom_attr
= attr
;
913 if ((pdev
->class >> 8) == PCI_CLASS_DISPLAY_VGA
) {
914 retval
= device_create_file(&pdev
->dev
, &vga_attr
);
919 /* add platform-specific attributes */
920 retval
= pcibios_add_platform_entries(pdev
);
924 /* add sysfs entries for various capabilities */
925 retval
= pci_create_capabilities_sysfs(pdev
);
932 if ((pdev
->class >> 8) == PCI_CLASS_DISPLAY_VGA
)
933 device_remove_file(&pdev
->dev
, &vga_attr
);
936 sysfs_remove_bin_file(&pdev
->dev
.kobj
, pdev
->rom_attr
);
937 kfree(pdev
->rom_attr
);
938 pdev
->rom_attr
= NULL
;
941 pci_remove_resource_files(pdev
);
943 if (pdev
->cfg_size
< PCI_CFG_SPACE_EXP_SIZE
)
944 sysfs_remove_bin_file(&pdev
->dev
.kobj
, &pci_config_attr
);
946 sysfs_remove_bin_file(&pdev
->dev
.kobj
, &pcie_config_attr
);
951 static void pci_remove_capabilities_sysfs(struct pci_dev
*dev
)
953 if (dev
->vpd
&& dev
->vpd
->attr
) {
954 sysfs_remove_bin_file(&dev
->dev
.kobj
, dev
->vpd
->attr
);
955 kfree(dev
->vpd
->attr
);
958 pcie_aspm_remove_sysfs_dev_files(dev
);
962 * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files
963 * @pdev: device whose entries we should free
965 * Cleanup when @pdev is removed from sysfs.
967 void pci_remove_sysfs_dev_files(struct pci_dev
*pdev
)
971 if (!sysfs_initialized
)
974 pci_remove_capabilities_sysfs(pdev
);
976 if (pdev
->cfg_size
< PCI_CFG_SPACE_EXP_SIZE
)
977 sysfs_remove_bin_file(&pdev
->dev
.kobj
, &pci_config_attr
);
979 sysfs_remove_bin_file(&pdev
->dev
.kobj
, &pcie_config_attr
);
981 pci_remove_resource_files(pdev
);
983 if (pci_resource_len(pdev
, PCI_ROM_RESOURCE
))
984 rom_size
= pci_resource_len(pdev
, PCI_ROM_RESOURCE
);
985 else if (pdev
->resource
[PCI_ROM_RESOURCE
].flags
& IORESOURCE_ROM_SHADOW
)
988 if (rom_size
&& pdev
->rom_attr
) {
989 sysfs_remove_bin_file(&pdev
->dev
.kobj
, pdev
->rom_attr
);
990 kfree(pdev
->rom_attr
);
994 static int __init
pci_sysfs_init(void)
996 struct pci_dev
*pdev
= NULL
;
999 sysfs_initialized
= 1;
1000 for_each_pci_dev(pdev
) {
1001 retval
= pci_create_sysfs_dev_files(pdev
);
1011 late_initcall(pci_sysfs_init
);