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 (pci_is_enabled(pdev
))
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 #ifdef CONFIG_HOTPLUG
223 static DEFINE_MUTEX(pci_remove_rescan_mutex
);
224 static ssize_t
bus_rescan_store(struct bus_type
*bus
, const char *buf
,
228 struct pci_bus
*b
= NULL
;
230 if (strict_strtoul(buf
, 0, &val
) < 0)
234 mutex_lock(&pci_remove_rescan_mutex
);
235 while ((b
= pci_find_next_bus(b
)) != NULL
)
237 mutex_unlock(&pci_remove_rescan_mutex
);
242 struct bus_attribute pci_bus_attrs
[] = {
243 __ATTR(rescan
, (S_IWUSR
|S_IWGRP
), NULL
, bus_rescan_store
),
248 dev_rescan_store(struct device
*dev
, struct device_attribute
*attr
,
249 const char *buf
, size_t count
)
252 struct pci_dev
*pdev
= to_pci_dev(dev
);
254 if (strict_strtoul(buf
, 0, &val
) < 0)
258 mutex_lock(&pci_remove_rescan_mutex
);
259 pci_rescan_bus(pdev
->bus
);
260 mutex_unlock(&pci_remove_rescan_mutex
);
265 static void remove_callback(struct device
*dev
)
267 struct pci_dev
*pdev
= to_pci_dev(dev
);
269 mutex_lock(&pci_remove_rescan_mutex
);
270 pci_remove_bus_device(pdev
);
271 mutex_unlock(&pci_remove_rescan_mutex
);
275 remove_store(struct device
*dev
, struct device_attribute
*dummy
,
276 const char *buf
, size_t count
)
281 if (strict_strtoul(buf
, 0, &val
) < 0)
284 /* An attribute cannot be unregistered by one of its own methods,
285 * so we have to use this roundabout approach.
288 ret
= device_schedule_callback(dev
, remove_callback
);
295 struct device_attribute pci_dev_attrs
[] = {
299 __ATTR_RO(subsystem_vendor
),
300 __ATTR_RO(subsystem_device
),
303 __ATTR_RO(local_cpus
),
304 __ATTR_RO(local_cpulist
),
307 __ATTR_RO(numa_node
),
309 __ATTR(enable
, 0600, is_enabled_show
, is_enabled_store
),
310 __ATTR(broken_parity_status
,(S_IRUGO
|S_IWUSR
),
311 broken_parity_status_show
,broken_parity_status_store
),
312 __ATTR(msi_bus
, 0644, msi_bus_show
, msi_bus_store
),
313 #ifdef CONFIG_HOTPLUG
314 __ATTR(remove
, (S_IWUSR
|S_IWGRP
), NULL
, remove_store
),
315 __ATTR(rescan
, (S_IWUSR
|S_IWGRP
), NULL
, dev_rescan_store
),
321 boot_vga_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
323 struct pci_dev
*pdev
= to_pci_dev(dev
);
325 return sprintf(buf
, "%u\n",
326 !!(pdev
->resource
[PCI_ROM_RESOURCE
].flags
&
327 IORESOURCE_ROM_SHADOW
));
329 struct device_attribute vga_attr
= __ATTR_RO(boot_vga
);
332 pci_read_config(struct kobject
*kobj
, struct bin_attribute
*bin_attr
,
333 char *buf
, loff_t off
, size_t count
)
335 struct pci_dev
*dev
= to_pci_dev(container_of(kobj
,struct device
,kobj
));
336 unsigned int size
= 64;
337 loff_t init_off
= off
;
338 u8
*data
= (u8
*) buf
;
340 /* Several chips lock up trying to read undefined config space */
341 if (capable(CAP_SYS_ADMIN
)) {
342 size
= dev
->cfg_size
;
343 } else if (dev
->hdr_type
== PCI_HEADER_TYPE_CARDBUS
) {
349 if (off
+ count
> size
) {
356 if ((off
& 1) && size
) {
358 pci_user_read_config_byte(dev
, off
, &val
);
359 data
[off
- init_off
] = val
;
364 if ((off
& 3) && size
> 2) {
366 pci_user_read_config_word(dev
, off
, &val
);
367 data
[off
- init_off
] = val
& 0xff;
368 data
[off
- init_off
+ 1] = (val
>> 8) & 0xff;
375 pci_user_read_config_dword(dev
, off
, &val
);
376 data
[off
- init_off
] = val
& 0xff;
377 data
[off
- init_off
+ 1] = (val
>> 8) & 0xff;
378 data
[off
- init_off
+ 2] = (val
>> 16) & 0xff;
379 data
[off
- init_off
+ 3] = (val
>> 24) & 0xff;
386 pci_user_read_config_word(dev
, off
, &val
);
387 data
[off
- init_off
] = val
& 0xff;
388 data
[off
- init_off
+ 1] = (val
>> 8) & 0xff;
395 pci_user_read_config_byte(dev
, off
, &val
);
396 data
[off
- init_off
] = val
;
405 pci_write_config(struct kobject
*kobj
, struct bin_attribute
*bin_attr
,
406 char *buf
, loff_t off
, size_t count
)
408 struct pci_dev
*dev
= to_pci_dev(container_of(kobj
,struct device
,kobj
));
409 unsigned int size
= count
;
410 loff_t init_off
= off
;
411 u8
*data
= (u8
*) buf
;
413 if (off
> dev
->cfg_size
)
415 if (off
+ count
> dev
->cfg_size
) {
416 size
= dev
->cfg_size
- off
;
420 if ((off
& 1) && size
) {
421 pci_user_write_config_byte(dev
, off
, data
[off
- init_off
]);
426 if ((off
& 3) && size
> 2) {
427 u16 val
= data
[off
- init_off
];
428 val
|= (u16
) data
[off
- init_off
+ 1] << 8;
429 pci_user_write_config_word(dev
, off
, val
);
435 u32 val
= data
[off
- init_off
];
436 val
|= (u32
) data
[off
- init_off
+ 1] << 8;
437 val
|= (u32
) data
[off
- init_off
+ 2] << 16;
438 val
|= (u32
) data
[off
- init_off
+ 3] << 24;
439 pci_user_write_config_dword(dev
, off
, val
);
445 u16 val
= data
[off
- init_off
];
446 val
|= (u16
) data
[off
- init_off
+ 1] << 8;
447 pci_user_write_config_word(dev
, off
, val
);
453 pci_user_write_config_byte(dev
, off
, data
[off
- init_off
]);
462 read_vpd_attr(struct kobject
*kobj
, struct bin_attribute
*bin_attr
,
463 char *buf
, loff_t off
, size_t count
)
465 struct pci_dev
*dev
=
466 to_pci_dev(container_of(kobj
, struct device
, kobj
));
468 if (off
> bin_attr
->size
)
470 else if (count
> bin_attr
->size
- off
)
471 count
= bin_attr
->size
- off
;
473 return pci_read_vpd(dev
, off
, count
, buf
);
477 write_vpd_attr(struct kobject
*kobj
, struct bin_attribute
*bin_attr
,
478 char *buf
, loff_t off
, size_t count
)
480 struct pci_dev
*dev
=
481 to_pci_dev(container_of(kobj
, struct device
, kobj
));
483 if (off
> bin_attr
->size
)
485 else if (count
> bin_attr
->size
- off
)
486 count
= bin_attr
->size
- off
;
488 return pci_write_vpd(dev
, off
, count
, buf
);
491 #ifdef HAVE_PCI_LEGACY
493 * pci_read_legacy_io - read byte(s) from legacy I/O port space
494 * @kobj: kobject corresponding to file to read from
495 * @bin_attr: struct bin_attribute for this file
496 * @buf: buffer to store results
497 * @off: offset into legacy I/O port space
498 * @count: number of bytes to read
500 * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific
501 * callback routine (pci_legacy_read).
504 pci_read_legacy_io(struct kobject
*kobj
, struct bin_attribute
*bin_attr
,
505 char *buf
, loff_t off
, size_t count
)
507 struct pci_bus
*bus
= to_pci_bus(container_of(kobj
,
511 /* Only support 1, 2 or 4 byte accesses */
512 if (count
!= 1 && count
!= 2 && count
!= 4)
515 return pci_legacy_read(bus
, off
, (u32
*)buf
, count
);
519 * pci_write_legacy_io - write byte(s) to legacy I/O port space
520 * @kobj: kobject corresponding to file to read from
521 * @bin_attr: struct bin_attribute for this file
522 * @buf: buffer containing value to be written
523 * @off: offset into legacy I/O port space
524 * @count: number of bytes to write
526 * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific
527 * callback routine (pci_legacy_write).
530 pci_write_legacy_io(struct kobject
*kobj
, struct bin_attribute
*bin_attr
,
531 char *buf
, loff_t off
, size_t count
)
533 struct pci_bus
*bus
= to_pci_bus(container_of(kobj
,
536 /* Only support 1, 2 or 4 byte accesses */
537 if (count
!= 1 && count
!= 2 && count
!= 4)
540 return pci_legacy_write(bus
, off
, *(u32
*)buf
, count
);
544 * pci_mmap_legacy_mem - map legacy PCI memory into user memory space
545 * @kobj: kobject corresponding to device to be mapped
546 * @attr: struct bin_attribute for this file
547 * @vma: struct vm_area_struct passed to mmap
549 * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap
550 * legacy memory space (first meg of bus space) into application virtual
554 pci_mmap_legacy_mem(struct kobject
*kobj
, struct bin_attribute
*attr
,
555 struct vm_area_struct
*vma
)
557 struct pci_bus
*bus
= to_pci_bus(container_of(kobj
,
561 return pci_mmap_legacy_page_range(bus
, vma
, pci_mmap_mem
);
565 * pci_mmap_legacy_io - map legacy PCI IO into user memory space
566 * @kobj: kobject corresponding to device to be mapped
567 * @attr: struct bin_attribute for this file
568 * @vma: struct vm_area_struct passed to mmap
570 * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap
571 * legacy IO space (first meg of bus space) into application virtual
572 * memory space. Returns -ENOSYS if the operation isn't supported
575 pci_mmap_legacy_io(struct kobject
*kobj
, struct bin_attribute
*attr
,
576 struct vm_area_struct
*vma
)
578 struct pci_bus
*bus
= to_pci_bus(container_of(kobj
,
582 return pci_mmap_legacy_page_range(bus
, vma
, pci_mmap_io
);
586 * pci_adjust_legacy_attr - adjustment of legacy file attributes
587 * @b: bus to create files under
588 * @mmap_type: I/O port or memory
590 * Stub implementation. Can be overridden by arch if necessary.
593 pci_adjust_legacy_attr(struct pci_bus
*b
, enum pci_mmap_state mmap_type
)
599 * pci_create_legacy_files - create legacy I/O port and memory files
600 * @b: bus to create files under
602 * Some platforms allow access to legacy I/O port and ISA memory space on
603 * a per-bus basis. This routine creates the files and ties them into
604 * their associated read, write and mmap files from pci-sysfs.c
606 * On error unwind, but don't propogate the error to the caller
607 * as it is ok to set up the PCI bus without these files.
609 void pci_create_legacy_files(struct pci_bus
*b
)
613 b
->legacy_io
= kzalloc(sizeof(struct bin_attribute
) * 2,
618 b
->legacy_io
->attr
.name
= "legacy_io";
619 b
->legacy_io
->size
= 0xffff;
620 b
->legacy_io
->attr
.mode
= S_IRUSR
| S_IWUSR
;
621 b
->legacy_io
->read
= pci_read_legacy_io
;
622 b
->legacy_io
->write
= pci_write_legacy_io
;
623 b
->legacy_io
->mmap
= pci_mmap_legacy_io
;
624 pci_adjust_legacy_attr(b
, pci_mmap_io
);
625 error
= device_create_bin_file(&b
->dev
, b
->legacy_io
);
629 /* Allocated above after the legacy_io struct */
630 b
->legacy_mem
= b
->legacy_io
+ 1;
631 b
->legacy_mem
->attr
.name
= "legacy_mem";
632 b
->legacy_mem
->size
= 1024*1024;
633 b
->legacy_mem
->attr
.mode
= S_IRUSR
| S_IWUSR
;
634 b
->legacy_mem
->mmap
= pci_mmap_legacy_mem
;
635 pci_adjust_legacy_attr(b
, pci_mmap_mem
);
636 error
= device_create_bin_file(&b
->dev
, b
->legacy_mem
);
643 device_remove_bin_file(&b
->dev
, b
->legacy_io
);
648 printk(KERN_WARNING
"pci: warning: could not create legacy I/O port "
649 "and ISA memory resources to sysfs\n");
653 void pci_remove_legacy_files(struct pci_bus
*b
)
656 device_remove_bin_file(&b
->dev
, b
->legacy_io
);
657 device_remove_bin_file(&b
->dev
, b
->legacy_mem
);
658 kfree(b
->legacy_io
); /* both are allocated here */
661 #endif /* HAVE_PCI_LEGACY */
665 int pci_mmap_fits(struct pci_dev
*pdev
, int resno
, struct vm_area_struct
*vma
)
667 unsigned long nr
, start
, size
;
669 nr
= (vma
->vm_end
- vma
->vm_start
) >> PAGE_SHIFT
;
670 start
= vma
->vm_pgoff
;
671 size
= ((pci_resource_len(pdev
, resno
) - 1) >> PAGE_SHIFT
) + 1;
672 if (start
< size
&& size
- start
>= nr
)
674 WARN(1, "process \"%s\" tried to map 0x%08lx-0x%08lx on %s BAR %d (size 0x%08lx)\n",
675 current
->comm
, start
, start
+nr
, pci_name(pdev
), resno
, size
);
680 * pci_mmap_resource - map a PCI resource into user memory space
681 * @kobj: kobject for mapping
682 * @attr: struct bin_attribute for the file being mapped
683 * @vma: struct vm_area_struct passed into the mmap
684 * @write_combine: 1 for write_combine mapping
686 * Use the regular PCI mapping routines to map a PCI resource into userspace.
689 pci_mmap_resource(struct kobject
*kobj
, struct bin_attribute
*attr
,
690 struct vm_area_struct
*vma
, int write_combine
)
692 struct pci_dev
*pdev
= to_pci_dev(container_of(kobj
,
693 struct device
, kobj
));
694 struct resource
*res
= (struct resource
*)attr
->private;
695 enum pci_mmap_state mmap_type
;
696 resource_size_t start
, end
;
699 for (i
= 0; i
< PCI_ROM_RESOURCE
; i
++)
700 if (res
== &pdev
->resource
[i
])
702 if (i
>= PCI_ROM_RESOURCE
)
705 if (!pci_mmap_fits(pdev
, i
, vma
))
708 /* pci_mmap_page_range() expects the same kind of entry as coming
709 * from /proc/bus/pci/ which is a "user visible" value. If this is
710 * different from the resource itself, arch will do necessary fixup.
712 pci_resource_to_user(pdev
, i
, res
, &start
, &end
);
713 vma
->vm_pgoff
+= start
>> PAGE_SHIFT
;
714 mmap_type
= res
->flags
& IORESOURCE_MEM
? pci_mmap_mem
: pci_mmap_io
;
716 if (res
->flags
& IORESOURCE_MEM
&& iomem_is_exclusive(start
))
719 return pci_mmap_page_range(pdev
, vma
, mmap_type
, write_combine
);
723 pci_mmap_resource_uc(struct kobject
*kobj
, struct bin_attribute
*attr
,
724 struct vm_area_struct
*vma
)
726 return pci_mmap_resource(kobj
, attr
, vma
, 0);
730 pci_mmap_resource_wc(struct kobject
*kobj
, struct bin_attribute
*attr
,
731 struct vm_area_struct
*vma
)
733 return pci_mmap_resource(kobj
, attr
, vma
, 1);
737 * pci_remove_resource_files - cleanup resource files
738 * @pdev: dev to cleanup
740 * If we created resource files for @pdev, remove them from sysfs and
741 * free their resources.
744 pci_remove_resource_files(struct pci_dev
*pdev
)
748 for (i
= 0; i
< PCI_ROM_RESOURCE
; i
++) {
749 struct bin_attribute
*res_attr
;
751 res_attr
= pdev
->res_attr
[i
];
753 sysfs_remove_bin_file(&pdev
->dev
.kobj
, res_attr
);
757 res_attr
= pdev
->res_attr_wc
[i
];
759 sysfs_remove_bin_file(&pdev
->dev
.kobj
, res_attr
);
765 static int pci_create_attr(struct pci_dev
*pdev
, int num
, int write_combine
)
767 /* allocate attribute structure, piggyback attribute name */
768 int name_len
= write_combine
? 13 : 10;
769 struct bin_attribute
*res_attr
;
772 res_attr
= kzalloc(sizeof(*res_attr
) + name_len
, GFP_ATOMIC
);
774 char *res_attr_name
= (char *)(res_attr
+ 1);
777 pdev
->res_attr_wc
[num
] = res_attr
;
778 sprintf(res_attr_name
, "resource%d_wc", num
);
779 res_attr
->mmap
= pci_mmap_resource_wc
;
781 pdev
->res_attr
[num
] = res_attr
;
782 sprintf(res_attr_name
, "resource%d", num
);
783 res_attr
->mmap
= pci_mmap_resource_uc
;
785 res_attr
->attr
.name
= res_attr_name
;
786 res_attr
->attr
.mode
= S_IRUSR
| S_IWUSR
;
787 res_attr
->size
= pci_resource_len(pdev
, num
);
788 res_attr
->private = &pdev
->resource
[num
];
789 retval
= sysfs_create_bin_file(&pdev
->dev
.kobj
, res_attr
);
797 * pci_create_resource_files - create resource files in sysfs for @dev
798 * @pdev: dev in question
800 * Walk the resources in @pdev creating files for each resource available.
802 static int pci_create_resource_files(struct pci_dev
*pdev
)
807 /* Expose the PCI resources from this device as files */
808 for (i
= 0; i
< PCI_ROM_RESOURCE
; i
++) {
810 /* skip empty resources */
811 if (!pci_resource_len(pdev
, i
))
814 retval
= pci_create_attr(pdev
, i
, 0);
815 /* for prefetchable resources, create a WC mappable file */
816 if (!retval
&& pdev
->resource
[i
].flags
& IORESOURCE_PREFETCH
)
817 retval
= pci_create_attr(pdev
, i
, 1);
820 pci_remove_resource_files(pdev
);
826 #else /* !HAVE_PCI_MMAP */
827 int __weak
pci_create_resource_files(struct pci_dev
*dev
) { return 0; }
828 void __weak
pci_remove_resource_files(struct pci_dev
*dev
) { return; }
829 #endif /* HAVE_PCI_MMAP */
832 * pci_write_rom - used to enable access to the PCI ROM display
833 * @kobj: kernel object handle
834 * @bin_attr: struct bin_attribute for this file
837 * @count: number of byte in input
839 * writing anything except 0 enables it
842 pci_write_rom(struct kobject
*kobj
, struct bin_attribute
*bin_attr
,
843 char *buf
, loff_t off
, size_t count
)
845 struct pci_dev
*pdev
= to_pci_dev(container_of(kobj
, struct device
, kobj
));
847 if ((off
== 0) && (*buf
== '0') && (count
== 2))
848 pdev
->rom_attr_enabled
= 0;
850 pdev
->rom_attr_enabled
= 1;
856 * pci_read_rom - read a PCI ROM
857 * @kobj: kernel object handle
858 * @bin_attr: struct bin_attribute for this file
859 * @buf: where to put the data we read from the ROM
861 * @count: number of bytes to read
863 * Put @count bytes starting at @off into @buf from the ROM in the PCI
864 * device corresponding to @kobj.
867 pci_read_rom(struct kobject
*kobj
, struct bin_attribute
*bin_attr
,
868 char *buf
, loff_t off
, size_t count
)
870 struct pci_dev
*pdev
= to_pci_dev(container_of(kobj
, struct device
, kobj
));
874 if (!pdev
->rom_attr_enabled
)
877 rom
= pci_map_rom(pdev
, &size
); /* size starts out as PCI window size */
884 if (off
+ count
> size
)
887 memcpy_fromio(buf
, rom
+ off
, count
);
889 pci_unmap_rom(pdev
, rom
);
894 static struct bin_attribute pci_config_attr
= {
897 .mode
= S_IRUGO
| S_IWUSR
,
899 .size
= PCI_CFG_SPACE_SIZE
,
900 .read
= pci_read_config
,
901 .write
= pci_write_config
,
904 static struct bin_attribute pcie_config_attr
= {
907 .mode
= S_IRUGO
| S_IWUSR
,
909 .size
= PCI_CFG_SPACE_EXP_SIZE
,
910 .read
= pci_read_config
,
911 .write
= pci_write_config
,
914 int __attribute__ ((weak
)) pcibios_add_platform_entries(struct pci_dev
*dev
)
919 static int pci_create_capabilities_sysfs(struct pci_dev
*dev
)
922 struct bin_attribute
*attr
;
924 /* If the device has VPD, try to expose it in sysfs. */
926 attr
= kzalloc(sizeof(*attr
), GFP_ATOMIC
);
930 attr
->size
= dev
->vpd
->len
;
931 attr
->attr
.name
= "vpd";
932 attr
->attr
.mode
= S_IRUSR
| S_IWUSR
;
933 attr
->read
= read_vpd_attr
;
934 attr
->write
= write_vpd_attr
;
935 retval
= sysfs_create_bin_file(&dev
->dev
.kobj
, attr
);
937 kfree(dev
->vpd
->attr
);
940 dev
->vpd
->attr
= attr
;
943 /* Active State Power Management */
944 pcie_aspm_create_sysfs_dev_files(dev
);
949 int __must_check
pci_create_sysfs_dev_files (struct pci_dev
*pdev
)
953 struct bin_attribute
*attr
;
955 if (!sysfs_initialized
)
958 if (pdev
->cfg_size
< PCI_CFG_SPACE_EXP_SIZE
)
959 retval
= sysfs_create_bin_file(&pdev
->dev
.kobj
, &pci_config_attr
);
961 retval
= sysfs_create_bin_file(&pdev
->dev
.kobj
, &pcie_config_attr
);
965 retval
= pci_create_resource_files(pdev
);
967 goto err_config_file
;
969 if (pci_resource_len(pdev
, PCI_ROM_RESOURCE
))
970 rom_size
= pci_resource_len(pdev
, PCI_ROM_RESOURCE
);
971 else if (pdev
->resource
[PCI_ROM_RESOURCE
].flags
& IORESOURCE_ROM_SHADOW
)
974 /* If the device has a ROM, try to expose it in sysfs. */
976 attr
= kzalloc(sizeof(*attr
), GFP_ATOMIC
);
979 goto err_resource_files
;
981 attr
->size
= rom_size
;
982 attr
->attr
.name
= "rom";
983 attr
->attr
.mode
= S_IRUSR
;
984 attr
->read
= pci_read_rom
;
985 attr
->write
= pci_write_rom
;
986 retval
= sysfs_create_bin_file(&pdev
->dev
.kobj
, attr
);
989 goto err_resource_files
;
991 pdev
->rom_attr
= attr
;
994 if ((pdev
->class >> 8) == PCI_CLASS_DISPLAY_VGA
) {
995 retval
= device_create_file(&pdev
->dev
, &vga_attr
);
1000 /* add platform-specific attributes */
1001 retval
= pcibios_add_platform_entries(pdev
);
1005 /* add sysfs entries for various capabilities */
1006 retval
= pci_create_capabilities_sysfs(pdev
);
1013 if ((pdev
->class >> 8) == PCI_CLASS_DISPLAY_VGA
)
1014 device_remove_file(&pdev
->dev
, &vga_attr
);
1017 sysfs_remove_bin_file(&pdev
->dev
.kobj
, pdev
->rom_attr
);
1018 kfree(pdev
->rom_attr
);
1019 pdev
->rom_attr
= NULL
;
1022 pci_remove_resource_files(pdev
);
1024 if (pdev
->cfg_size
< PCI_CFG_SPACE_EXP_SIZE
)
1025 sysfs_remove_bin_file(&pdev
->dev
.kobj
, &pci_config_attr
);
1027 sysfs_remove_bin_file(&pdev
->dev
.kobj
, &pcie_config_attr
);
1032 static void pci_remove_capabilities_sysfs(struct pci_dev
*dev
)
1034 if (dev
->vpd
&& dev
->vpd
->attr
) {
1035 sysfs_remove_bin_file(&dev
->dev
.kobj
, dev
->vpd
->attr
);
1036 kfree(dev
->vpd
->attr
);
1039 pcie_aspm_remove_sysfs_dev_files(dev
);
1043 * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files
1044 * @pdev: device whose entries we should free
1046 * Cleanup when @pdev is removed from sysfs.
1048 void pci_remove_sysfs_dev_files(struct pci_dev
*pdev
)
1052 if (!sysfs_initialized
)
1055 pci_remove_capabilities_sysfs(pdev
);
1057 if (pdev
->cfg_size
< PCI_CFG_SPACE_EXP_SIZE
)
1058 sysfs_remove_bin_file(&pdev
->dev
.kobj
, &pci_config_attr
);
1060 sysfs_remove_bin_file(&pdev
->dev
.kobj
, &pcie_config_attr
);
1062 pci_remove_resource_files(pdev
);
1064 if (pci_resource_len(pdev
, PCI_ROM_RESOURCE
))
1065 rom_size
= pci_resource_len(pdev
, PCI_ROM_RESOURCE
);
1066 else if (pdev
->resource
[PCI_ROM_RESOURCE
].flags
& IORESOURCE_ROM_SHADOW
)
1069 if (rom_size
&& pdev
->rom_attr
) {
1070 sysfs_remove_bin_file(&pdev
->dev
.kobj
, pdev
->rom_attr
);
1071 kfree(pdev
->rom_attr
);
1075 static int __init
pci_sysfs_init(void)
1077 struct pci_dev
*pdev
= NULL
;
1080 sysfs_initialized
= 1;
1081 for_each_pci_dev(pdev
) {
1082 retval
= pci_create_sysfs_dev_files(pdev
);
1092 late_initcall(pci_sysfs_init
);