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/export.h>
23 #include <linux/topology.h>
26 #include <linux/capability.h>
27 #include <linux/security.h>
28 #include <linux/pci-aspm.h>
29 #include <linux/slab.h>
32 static int sysfs_initialized
; /* = 0 */
34 /* show configuration fields */
35 #define pci_config_attr(field, format_string) \
37 field##_show(struct device *dev, struct device_attribute *attr, char *buf) \
39 struct pci_dev *pdev; \
41 pdev = to_pci_dev (dev); \
42 return sprintf (buf, format_string, pdev->field); \
45 pci_config_attr(vendor
, "0x%04x\n");
46 pci_config_attr(device
, "0x%04x\n");
47 pci_config_attr(subsystem_vendor
, "0x%04x\n");
48 pci_config_attr(subsystem_device
, "0x%04x\n");
49 pci_config_attr(class, "0x%06x\n");
50 pci_config_attr(irq
, "%u\n");
52 static ssize_t
broken_parity_status_show(struct device
*dev
,
53 struct device_attribute
*attr
,
56 struct pci_dev
*pdev
= to_pci_dev(dev
);
57 return sprintf (buf
, "%u\n", pdev
->broken_parity_status
);
60 static ssize_t
broken_parity_status_store(struct device
*dev
,
61 struct device_attribute
*attr
,
62 const char *buf
, size_t count
)
64 struct pci_dev
*pdev
= to_pci_dev(dev
);
67 if (strict_strtoul(buf
, 0, &val
) < 0)
70 pdev
->broken_parity_status
= !!val
;
75 static ssize_t
local_cpus_show(struct device
*dev
,
76 struct device_attribute
*attr
, char *buf
)
78 const struct cpumask
*mask
;
82 mask
= (dev_to_node(dev
) == -1) ? cpu_online_mask
:
83 cpumask_of_node(dev_to_node(dev
));
85 mask
= cpumask_of_pcibus(to_pci_dev(dev
)->bus
);
87 len
= cpumask_scnprintf(buf
, PAGE_SIZE
-2, mask
);
94 static ssize_t
local_cpulist_show(struct device
*dev
,
95 struct device_attribute
*attr
, char *buf
)
97 const struct cpumask
*mask
;
101 mask
= (dev_to_node(dev
) == -1) ? cpu_online_mask
:
102 cpumask_of_node(dev_to_node(dev
));
104 mask
= cpumask_of_pcibus(to_pci_dev(dev
)->bus
);
106 len
= cpulist_scnprintf(buf
, PAGE_SIZE
-2, mask
);
113 * PCI Bus Class Devices
115 static ssize_t
pci_bus_show_cpuaffinity(struct device
*dev
,
117 struct device_attribute
*attr
,
121 const struct cpumask
*cpumask
;
123 cpumask
= cpumask_of_pcibus(to_pci_bus(dev
));
125 cpulist_scnprintf(buf
, PAGE_SIZE
-2, cpumask
) :
126 cpumask_scnprintf(buf
, PAGE_SIZE
-2, cpumask
);
132 static inline ssize_t
pci_bus_show_cpumaskaffinity(struct device
*dev
,
133 struct device_attribute
*attr
,
136 return pci_bus_show_cpuaffinity(dev
, 0, attr
, buf
);
139 static inline ssize_t
pci_bus_show_cpulistaffinity(struct device
*dev
,
140 struct device_attribute
*attr
,
143 return pci_bus_show_cpuaffinity(dev
, 1, attr
, buf
);
148 resource_show(struct device
* dev
, struct device_attribute
*attr
, char * buf
)
150 struct pci_dev
* pci_dev
= to_pci_dev(dev
);
154 resource_size_t start
, end
;
156 if (pci_dev
->subordinate
)
157 max
= DEVICE_COUNT_RESOURCE
;
159 max
= PCI_BRIDGE_RESOURCES
;
161 for (i
= 0; i
< max
; i
++) {
162 struct resource
*res
= &pci_dev
->resource
[i
];
163 pci_resource_to_user(pci_dev
, i
, res
, &start
, &end
);
164 str
+= sprintf(str
,"0x%016llx 0x%016llx 0x%016llx\n",
165 (unsigned long long)start
,
166 (unsigned long long)end
,
167 (unsigned long long)res
->flags
);
172 static ssize_t
modalias_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
174 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
176 return sprintf(buf
, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n",
177 pci_dev
->vendor
, pci_dev
->device
,
178 pci_dev
->subsystem_vendor
, pci_dev
->subsystem_device
,
179 (u8
)(pci_dev
->class >> 16), (u8
)(pci_dev
->class >> 8),
180 (u8
)(pci_dev
->class));
183 static ssize_t
is_enabled_store(struct device
*dev
,
184 struct device_attribute
*attr
, const char *buf
,
187 struct pci_dev
*pdev
= to_pci_dev(dev
);
189 ssize_t result
= strict_strtoul(buf
, 0, &val
);
194 /* this can crash the machine when done on the "wrong" device */
195 if (!capable(CAP_SYS_ADMIN
))
199 if (pci_is_enabled(pdev
))
200 pci_disable_device(pdev
);
204 result
= pci_enable_device(pdev
);
206 return result
< 0 ? result
: count
;
209 static ssize_t
is_enabled_show(struct device
*dev
,
210 struct device_attribute
*attr
, char *buf
)
212 struct pci_dev
*pdev
;
214 pdev
= to_pci_dev (dev
);
215 return sprintf (buf
, "%u\n", atomic_read(&pdev
->enable_cnt
));
220 numa_node_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
222 return sprintf (buf
, "%d\n", dev
->numa_node
);
227 dma_mask_bits_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
229 struct pci_dev
*pdev
= to_pci_dev(dev
);
231 return sprintf (buf
, "%d\n", fls64(pdev
->dma_mask
));
235 consistent_dma_mask_bits_show(struct device
*dev
, struct device_attribute
*attr
,
238 return sprintf (buf
, "%d\n", fls64(dev
->coherent_dma_mask
));
242 msi_bus_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
244 struct pci_dev
*pdev
= to_pci_dev(dev
);
246 if (!pdev
->subordinate
)
249 return sprintf (buf
, "%u\n",
250 !(pdev
->subordinate
->bus_flags
& PCI_BUS_FLAGS_NO_MSI
));
254 msi_bus_store(struct device
*dev
, struct device_attribute
*attr
,
255 const char *buf
, size_t count
)
257 struct pci_dev
*pdev
= to_pci_dev(dev
);
260 if (strict_strtoul(buf
, 0, &val
) < 0)
263 /* bad things may happen if the no_msi flag is changed
264 * while some drivers are loaded */
265 if (!capable(CAP_SYS_ADMIN
))
268 /* Maybe pci devices without subordinate busses shouldn't even have this
269 * attribute in the first place? */
270 if (!pdev
->subordinate
)
273 /* Is the flag going to change, or keep the value it already had? */
274 if (!(pdev
->subordinate
->bus_flags
& PCI_BUS_FLAGS_NO_MSI
) ^
276 pdev
->subordinate
->bus_flags
^= PCI_BUS_FLAGS_NO_MSI
;
278 dev_warn(&pdev
->dev
, "forced subordinate bus to%s support MSI,"
279 " bad things could happen\n", val
? "" : " not");
285 #ifdef CONFIG_HOTPLUG
286 static DEFINE_MUTEX(pci_remove_rescan_mutex
);
287 static ssize_t
bus_rescan_store(struct bus_type
*bus
, const char *buf
,
291 struct pci_bus
*b
= NULL
;
293 if (strict_strtoul(buf
, 0, &val
) < 0)
297 mutex_lock(&pci_remove_rescan_mutex
);
298 while ((b
= pci_find_next_bus(b
)) != NULL
)
300 mutex_unlock(&pci_remove_rescan_mutex
);
305 struct bus_attribute pci_bus_attrs
[] = {
306 __ATTR(rescan
, (S_IWUSR
|S_IWGRP
), NULL
, bus_rescan_store
),
311 dev_rescan_store(struct device
*dev
, struct device_attribute
*attr
,
312 const char *buf
, size_t count
)
315 struct pci_dev
*pdev
= to_pci_dev(dev
);
317 if (strict_strtoul(buf
, 0, &val
) < 0)
321 mutex_lock(&pci_remove_rescan_mutex
);
322 pci_rescan_bus(pdev
->bus
);
323 mutex_unlock(&pci_remove_rescan_mutex
);
328 static void remove_callback(struct device
*dev
)
330 struct pci_dev
*pdev
= to_pci_dev(dev
);
332 mutex_lock(&pci_remove_rescan_mutex
);
333 pci_stop_and_remove_bus_device(pdev
);
334 mutex_unlock(&pci_remove_rescan_mutex
);
338 remove_store(struct device
*dev
, struct device_attribute
*dummy
,
339 const char *buf
, size_t count
)
344 if (strict_strtoul(buf
, 0, &val
) < 0)
347 /* An attribute cannot be unregistered by one of its own methods,
348 * so we have to use this roundabout approach.
351 ret
= device_schedule_callback(dev
, remove_callback
);
358 dev_bus_rescan_store(struct device
*dev
, struct device_attribute
*attr
,
359 const char *buf
, size_t count
)
362 struct pci_bus
*bus
= to_pci_bus(dev
);
364 if (strict_strtoul(buf
, 0, &val
) < 0)
368 mutex_lock(&pci_remove_rescan_mutex
);
369 if (!pci_is_root_bus(bus
) && list_empty(&bus
->devices
))
370 pci_rescan_bus_bridge_resize(bus
->self
);
373 mutex_unlock(&pci_remove_rescan_mutex
);
380 struct device_attribute pci_dev_attrs
[] = {
384 __ATTR_RO(subsystem_vendor
),
385 __ATTR_RO(subsystem_device
),
388 __ATTR_RO(local_cpus
),
389 __ATTR_RO(local_cpulist
),
392 __ATTR_RO(numa_node
),
394 __ATTR_RO(dma_mask_bits
),
395 __ATTR_RO(consistent_dma_mask_bits
),
396 __ATTR(enable
, 0600, is_enabled_show
, is_enabled_store
),
397 __ATTR(broken_parity_status
,(S_IRUGO
|S_IWUSR
),
398 broken_parity_status_show
,broken_parity_status_store
),
399 __ATTR(msi_bus
, 0644, msi_bus_show
, msi_bus_store
),
400 #ifdef CONFIG_HOTPLUG
401 __ATTR(remove
, (S_IWUSR
|S_IWGRP
), NULL
, remove_store
),
402 __ATTR(rescan
, (S_IWUSR
|S_IWGRP
), NULL
, dev_rescan_store
),
407 struct device_attribute pcibus_dev_attrs
[] = {
408 #ifdef CONFIG_HOTPLUG
409 __ATTR(rescan
, (S_IWUSR
|S_IWGRP
), NULL
, dev_bus_rescan_store
),
411 __ATTR(cpuaffinity
, S_IRUGO
, pci_bus_show_cpumaskaffinity
, NULL
),
412 __ATTR(cpulistaffinity
, S_IRUGO
, pci_bus_show_cpulistaffinity
, NULL
),
417 boot_vga_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
419 struct pci_dev
*pdev
= to_pci_dev(dev
);
421 return sprintf(buf
, "%u\n",
422 !!(pdev
->resource
[PCI_ROM_RESOURCE
].flags
&
423 IORESOURCE_ROM_SHADOW
));
425 struct device_attribute vga_attr
= __ATTR_RO(boot_vga
);
428 pci_read_config(struct file
*filp
, struct kobject
*kobj
,
429 struct bin_attribute
*bin_attr
,
430 char *buf
, loff_t off
, size_t count
)
432 struct pci_dev
*dev
= to_pci_dev(container_of(kobj
,struct device
,kobj
));
433 unsigned int size
= 64;
434 loff_t init_off
= off
;
435 u8
*data
= (u8
*) buf
;
437 /* Several chips lock up trying to read undefined config space */
438 if (security_capable(filp
->f_cred
, &init_user_ns
, CAP_SYS_ADMIN
) == 0) {
439 size
= dev
->cfg_size
;
440 } else if (dev
->hdr_type
== PCI_HEADER_TYPE_CARDBUS
) {
446 if (off
+ count
> size
) {
453 if ((off
& 1) && size
) {
455 pci_user_read_config_byte(dev
, off
, &val
);
456 data
[off
- init_off
] = val
;
461 if ((off
& 3) && size
> 2) {
463 pci_user_read_config_word(dev
, off
, &val
);
464 data
[off
- init_off
] = val
& 0xff;
465 data
[off
- init_off
+ 1] = (val
>> 8) & 0xff;
472 pci_user_read_config_dword(dev
, off
, &val
);
473 data
[off
- init_off
] = val
& 0xff;
474 data
[off
- init_off
+ 1] = (val
>> 8) & 0xff;
475 data
[off
- init_off
+ 2] = (val
>> 16) & 0xff;
476 data
[off
- init_off
+ 3] = (val
>> 24) & 0xff;
483 pci_user_read_config_word(dev
, off
, &val
);
484 data
[off
- init_off
] = val
& 0xff;
485 data
[off
- init_off
+ 1] = (val
>> 8) & 0xff;
492 pci_user_read_config_byte(dev
, off
, &val
);
493 data
[off
- init_off
] = val
;
502 pci_write_config(struct file
* filp
, struct kobject
*kobj
,
503 struct bin_attribute
*bin_attr
,
504 char *buf
, loff_t off
, size_t count
)
506 struct pci_dev
*dev
= to_pci_dev(container_of(kobj
,struct device
,kobj
));
507 unsigned int size
= count
;
508 loff_t init_off
= off
;
509 u8
*data
= (u8
*) buf
;
511 if (off
> dev
->cfg_size
)
513 if (off
+ count
> dev
->cfg_size
) {
514 size
= dev
->cfg_size
- off
;
518 if ((off
& 1) && size
) {
519 pci_user_write_config_byte(dev
, off
, data
[off
- init_off
]);
524 if ((off
& 3) && size
> 2) {
525 u16 val
= data
[off
- init_off
];
526 val
|= (u16
) data
[off
- init_off
+ 1] << 8;
527 pci_user_write_config_word(dev
, off
, val
);
533 u32 val
= data
[off
- init_off
];
534 val
|= (u32
) data
[off
- init_off
+ 1] << 8;
535 val
|= (u32
) data
[off
- init_off
+ 2] << 16;
536 val
|= (u32
) data
[off
- init_off
+ 3] << 24;
537 pci_user_write_config_dword(dev
, off
, val
);
543 u16 val
= data
[off
- init_off
];
544 val
|= (u16
) data
[off
- init_off
+ 1] << 8;
545 pci_user_write_config_word(dev
, off
, val
);
551 pci_user_write_config_byte(dev
, off
, data
[off
- init_off
]);
560 read_vpd_attr(struct file
*filp
, struct kobject
*kobj
,
561 struct bin_attribute
*bin_attr
,
562 char *buf
, loff_t off
, size_t count
)
564 struct pci_dev
*dev
=
565 to_pci_dev(container_of(kobj
, struct device
, kobj
));
567 if (off
> bin_attr
->size
)
569 else if (count
> bin_attr
->size
- off
)
570 count
= bin_attr
->size
- off
;
572 return pci_read_vpd(dev
, off
, count
, buf
);
576 write_vpd_attr(struct file
*filp
, struct kobject
*kobj
,
577 struct bin_attribute
*bin_attr
,
578 char *buf
, loff_t off
, size_t count
)
580 struct pci_dev
*dev
=
581 to_pci_dev(container_of(kobj
, struct device
, kobj
));
583 if (off
> bin_attr
->size
)
585 else if (count
> bin_attr
->size
- off
)
586 count
= bin_attr
->size
- off
;
588 return pci_write_vpd(dev
, off
, count
, buf
);
591 #ifdef HAVE_PCI_LEGACY
593 * pci_read_legacy_io - read byte(s) from legacy I/O port space
594 * @filp: open sysfs file
595 * @kobj: kobject corresponding to file to read from
596 * @bin_attr: struct bin_attribute for this file
597 * @buf: buffer to store results
598 * @off: offset into legacy I/O port space
599 * @count: number of bytes to read
601 * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific
602 * callback routine (pci_legacy_read).
605 pci_read_legacy_io(struct file
*filp
, struct kobject
*kobj
,
606 struct bin_attribute
*bin_attr
,
607 char *buf
, loff_t off
, size_t count
)
609 struct pci_bus
*bus
= to_pci_bus(container_of(kobj
,
613 /* Only support 1, 2 or 4 byte accesses */
614 if (count
!= 1 && count
!= 2 && count
!= 4)
617 return pci_legacy_read(bus
, off
, (u32
*)buf
, count
);
621 * pci_write_legacy_io - write byte(s) to legacy I/O port space
622 * @filp: open sysfs file
623 * @kobj: kobject corresponding to file to read from
624 * @bin_attr: struct bin_attribute for this file
625 * @buf: buffer containing value to be written
626 * @off: offset into legacy I/O port space
627 * @count: number of bytes to write
629 * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific
630 * callback routine (pci_legacy_write).
633 pci_write_legacy_io(struct file
*filp
, struct kobject
*kobj
,
634 struct bin_attribute
*bin_attr
,
635 char *buf
, loff_t off
, size_t count
)
637 struct pci_bus
*bus
= to_pci_bus(container_of(kobj
,
640 /* Only support 1, 2 or 4 byte accesses */
641 if (count
!= 1 && count
!= 2 && count
!= 4)
644 return pci_legacy_write(bus
, off
, *(u32
*)buf
, count
);
648 * pci_mmap_legacy_mem - map legacy PCI memory into user memory space
649 * @filp: open sysfs file
650 * @kobj: kobject corresponding to device to be mapped
651 * @attr: struct bin_attribute for this file
652 * @vma: struct vm_area_struct passed to mmap
654 * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap
655 * legacy memory space (first meg of bus space) into application virtual
659 pci_mmap_legacy_mem(struct file
*filp
, struct kobject
*kobj
,
660 struct bin_attribute
*attr
,
661 struct vm_area_struct
*vma
)
663 struct pci_bus
*bus
= to_pci_bus(container_of(kobj
,
667 return pci_mmap_legacy_page_range(bus
, vma
, pci_mmap_mem
);
671 * pci_mmap_legacy_io - map legacy PCI IO into user memory space
672 * @filp: open sysfs file
673 * @kobj: kobject corresponding to device to be mapped
674 * @attr: struct bin_attribute for this file
675 * @vma: struct vm_area_struct passed to mmap
677 * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap
678 * legacy IO space (first meg of bus space) into application virtual
679 * memory space. Returns -ENOSYS if the operation isn't supported
682 pci_mmap_legacy_io(struct file
*filp
, struct kobject
*kobj
,
683 struct bin_attribute
*attr
,
684 struct vm_area_struct
*vma
)
686 struct pci_bus
*bus
= to_pci_bus(container_of(kobj
,
690 return pci_mmap_legacy_page_range(bus
, vma
, pci_mmap_io
);
694 * pci_adjust_legacy_attr - adjustment of legacy file attributes
695 * @b: bus to create files under
696 * @mmap_type: I/O port or memory
698 * Stub implementation. Can be overridden by arch if necessary.
701 pci_adjust_legacy_attr(struct pci_bus
*b
, enum pci_mmap_state mmap_type
)
707 * pci_create_legacy_files - create legacy I/O port and memory files
708 * @b: bus to create files under
710 * Some platforms allow access to legacy I/O port and ISA memory space on
711 * a per-bus basis. This routine creates the files and ties them into
712 * their associated read, write and mmap files from pci-sysfs.c
714 * On error unwind, but don't propagate the error to the caller
715 * as it is ok to set up the PCI bus without these files.
717 void pci_create_legacy_files(struct pci_bus
*b
)
721 b
->legacy_io
= kzalloc(sizeof(struct bin_attribute
) * 2,
726 sysfs_bin_attr_init(b
->legacy_io
);
727 b
->legacy_io
->attr
.name
= "legacy_io";
728 b
->legacy_io
->size
= 0xffff;
729 b
->legacy_io
->attr
.mode
= S_IRUSR
| S_IWUSR
;
730 b
->legacy_io
->read
= pci_read_legacy_io
;
731 b
->legacy_io
->write
= pci_write_legacy_io
;
732 b
->legacy_io
->mmap
= pci_mmap_legacy_io
;
733 pci_adjust_legacy_attr(b
, pci_mmap_io
);
734 error
= device_create_bin_file(&b
->dev
, b
->legacy_io
);
738 /* Allocated above after the legacy_io struct */
739 b
->legacy_mem
= b
->legacy_io
+ 1;
740 sysfs_bin_attr_init(b
->legacy_mem
);
741 b
->legacy_mem
->attr
.name
= "legacy_mem";
742 b
->legacy_mem
->size
= 1024*1024;
743 b
->legacy_mem
->attr
.mode
= S_IRUSR
| S_IWUSR
;
744 b
->legacy_mem
->mmap
= pci_mmap_legacy_mem
;
745 pci_adjust_legacy_attr(b
, pci_mmap_mem
);
746 error
= device_create_bin_file(&b
->dev
, b
->legacy_mem
);
753 device_remove_bin_file(&b
->dev
, b
->legacy_io
);
758 printk(KERN_WARNING
"pci: warning: could not create legacy I/O port "
759 "and ISA memory resources to sysfs\n");
763 void pci_remove_legacy_files(struct pci_bus
*b
)
766 device_remove_bin_file(&b
->dev
, b
->legacy_io
);
767 device_remove_bin_file(&b
->dev
, b
->legacy_mem
);
768 kfree(b
->legacy_io
); /* both are allocated here */
771 #endif /* HAVE_PCI_LEGACY */
775 int pci_mmap_fits(struct pci_dev
*pdev
, int resno
, struct vm_area_struct
*vma
,
776 enum pci_mmap_api mmap_api
)
778 unsigned long nr
, start
, size
, pci_start
;
780 if (pci_resource_len(pdev
, resno
) == 0)
782 nr
= (vma
->vm_end
- vma
->vm_start
) >> PAGE_SHIFT
;
783 start
= vma
->vm_pgoff
;
784 size
= ((pci_resource_len(pdev
, resno
) - 1) >> PAGE_SHIFT
) + 1;
785 pci_start
= (mmap_api
== PCI_MMAP_PROCFS
) ?
786 pci_resource_start(pdev
, resno
) >> PAGE_SHIFT
: 0;
787 if (start
>= pci_start
&& start
< pci_start
+ size
&&
788 start
+ nr
<= pci_start
+ size
)
794 * pci_mmap_resource - map a PCI resource into user memory space
795 * @kobj: kobject for mapping
796 * @attr: struct bin_attribute for the file being mapped
797 * @vma: struct vm_area_struct passed into the mmap
798 * @write_combine: 1 for write_combine mapping
800 * Use the regular PCI mapping routines to map a PCI resource into userspace.
803 pci_mmap_resource(struct kobject
*kobj
, struct bin_attribute
*attr
,
804 struct vm_area_struct
*vma
, int write_combine
)
806 struct pci_dev
*pdev
= to_pci_dev(container_of(kobj
,
807 struct device
, kobj
));
808 struct resource
*res
= attr
->private;
809 enum pci_mmap_state mmap_type
;
810 resource_size_t start
, end
;
813 for (i
= 0; i
< PCI_ROM_RESOURCE
; i
++)
814 if (res
== &pdev
->resource
[i
])
816 if (i
>= PCI_ROM_RESOURCE
)
819 if (!pci_mmap_fits(pdev
, i
, vma
, PCI_MMAP_SYSFS
)) {
820 WARN(1, "process \"%s\" tried to map 0x%08lx bytes "
821 "at page 0x%08lx on %s BAR %d (start 0x%16Lx, size 0x%16Lx)\n",
822 current
->comm
, vma
->vm_end
-vma
->vm_start
, vma
->vm_pgoff
,
824 (u64
)pci_resource_start(pdev
, i
),
825 (u64
)pci_resource_len(pdev
, i
));
829 /* pci_mmap_page_range() expects the same kind of entry as coming
830 * from /proc/bus/pci/ which is a "user visible" value. If this is
831 * different from the resource itself, arch will do necessary fixup.
833 pci_resource_to_user(pdev
, i
, res
, &start
, &end
);
834 vma
->vm_pgoff
+= start
>> PAGE_SHIFT
;
835 mmap_type
= res
->flags
& IORESOURCE_MEM
? pci_mmap_mem
: pci_mmap_io
;
837 if (res
->flags
& IORESOURCE_MEM
&& iomem_is_exclusive(start
))
840 return pci_mmap_page_range(pdev
, vma
, mmap_type
, write_combine
);
844 pci_mmap_resource_uc(struct file
*filp
, struct kobject
*kobj
,
845 struct bin_attribute
*attr
,
846 struct vm_area_struct
*vma
)
848 return pci_mmap_resource(kobj
, attr
, vma
, 0);
852 pci_mmap_resource_wc(struct file
*filp
, struct kobject
*kobj
,
853 struct bin_attribute
*attr
,
854 struct vm_area_struct
*vma
)
856 return pci_mmap_resource(kobj
, attr
, vma
, 1);
860 pci_resource_io(struct file
*filp
, struct kobject
*kobj
,
861 struct bin_attribute
*attr
, char *buf
,
862 loff_t off
, size_t count
, bool write
)
864 struct pci_dev
*pdev
= to_pci_dev(container_of(kobj
,
865 struct device
, kobj
));
866 struct resource
*res
= attr
->private;
867 unsigned long port
= off
;
870 for (i
= 0; i
< PCI_ROM_RESOURCE
; i
++)
871 if (res
== &pdev
->resource
[i
])
873 if (i
>= PCI_ROM_RESOURCE
)
876 port
+= pci_resource_start(pdev
, i
);
878 if (port
> pci_resource_end(pdev
, i
))
881 if (port
+ count
- 1 > pci_resource_end(pdev
, i
))
887 outb(*(u8
*)buf
, port
);
889 *(u8
*)buf
= inb(port
);
893 outw(*(u16
*)buf
, port
);
895 *(u16
*)buf
= inw(port
);
899 outl(*(u32
*)buf
, port
);
901 *(u32
*)buf
= inl(port
);
908 pci_read_resource_io(struct file
*filp
, struct kobject
*kobj
,
909 struct bin_attribute
*attr
, char *buf
,
910 loff_t off
, size_t count
)
912 return pci_resource_io(filp
, kobj
, attr
, buf
, off
, count
, false);
916 pci_write_resource_io(struct file
*filp
, struct kobject
*kobj
,
917 struct bin_attribute
*attr
, char *buf
,
918 loff_t off
, size_t count
)
920 return pci_resource_io(filp
, kobj
, attr
, buf
, off
, count
, true);
924 * pci_remove_resource_files - cleanup resource files
925 * @pdev: dev to cleanup
927 * If we created resource files for @pdev, remove them from sysfs and
928 * free their resources.
931 pci_remove_resource_files(struct pci_dev
*pdev
)
935 for (i
= 0; i
< PCI_ROM_RESOURCE
; i
++) {
936 struct bin_attribute
*res_attr
;
938 res_attr
= pdev
->res_attr
[i
];
940 sysfs_remove_bin_file(&pdev
->dev
.kobj
, res_attr
);
944 res_attr
= pdev
->res_attr_wc
[i
];
946 sysfs_remove_bin_file(&pdev
->dev
.kobj
, res_attr
);
952 static int pci_create_attr(struct pci_dev
*pdev
, int num
, int write_combine
)
954 /* allocate attribute structure, piggyback attribute name */
955 int name_len
= write_combine
? 13 : 10;
956 struct bin_attribute
*res_attr
;
959 res_attr
= kzalloc(sizeof(*res_attr
) + name_len
, GFP_ATOMIC
);
961 char *res_attr_name
= (char *)(res_attr
+ 1);
963 sysfs_bin_attr_init(res_attr
);
965 pdev
->res_attr_wc
[num
] = res_attr
;
966 sprintf(res_attr_name
, "resource%d_wc", num
);
967 res_attr
->mmap
= pci_mmap_resource_wc
;
969 pdev
->res_attr
[num
] = res_attr
;
970 sprintf(res_attr_name
, "resource%d", num
);
971 res_attr
->mmap
= pci_mmap_resource_uc
;
973 if (pci_resource_flags(pdev
, num
) & IORESOURCE_IO
) {
974 res_attr
->read
= pci_read_resource_io
;
975 res_attr
->write
= pci_write_resource_io
;
977 res_attr
->attr
.name
= res_attr_name
;
978 res_attr
->attr
.mode
= S_IRUSR
| S_IWUSR
;
979 res_attr
->size
= pci_resource_len(pdev
, num
);
980 res_attr
->private = &pdev
->resource
[num
];
981 retval
= sysfs_create_bin_file(&pdev
->dev
.kobj
, res_attr
);
989 * pci_create_resource_files - create resource files in sysfs for @dev
990 * @pdev: dev in question
992 * Walk the resources in @pdev creating files for each resource available.
994 static int pci_create_resource_files(struct pci_dev
*pdev
)
999 /* Expose the PCI resources from this device as files */
1000 for (i
= 0; i
< PCI_ROM_RESOURCE
; i
++) {
1002 /* skip empty resources */
1003 if (!pci_resource_len(pdev
, i
))
1006 retval
= pci_create_attr(pdev
, i
, 0);
1007 /* for prefetchable resources, create a WC mappable file */
1008 if (!retval
&& pdev
->resource
[i
].flags
& IORESOURCE_PREFETCH
)
1009 retval
= pci_create_attr(pdev
, i
, 1);
1012 pci_remove_resource_files(pdev
);
1018 #else /* !HAVE_PCI_MMAP */
1019 int __weak
pci_create_resource_files(struct pci_dev
*dev
) { return 0; }
1020 void __weak
pci_remove_resource_files(struct pci_dev
*dev
) { return; }
1021 #endif /* HAVE_PCI_MMAP */
1024 * pci_write_rom - used to enable access to the PCI ROM display
1026 * @kobj: kernel object handle
1027 * @bin_attr: struct bin_attribute for this file
1030 * @count: number of byte in input
1032 * writing anything except 0 enables it
1035 pci_write_rom(struct file
*filp
, struct kobject
*kobj
,
1036 struct bin_attribute
*bin_attr
,
1037 char *buf
, loff_t off
, size_t count
)
1039 struct pci_dev
*pdev
= to_pci_dev(container_of(kobj
, struct device
, kobj
));
1041 if ((off
== 0) && (*buf
== '0') && (count
== 2))
1042 pdev
->rom_attr_enabled
= 0;
1044 pdev
->rom_attr_enabled
= 1;
1050 * pci_read_rom - read a PCI ROM
1052 * @kobj: kernel object handle
1053 * @bin_attr: struct bin_attribute for this file
1054 * @buf: where to put the data we read from the ROM
1056 * @count: number of bytes to read
1058 * Put @count bytes starting at @off into @buf from the ROM in the PCI
1059 * device corresponding to @kobj.
1062 pci_read_rom(struct file
*filp
, struct kobject
*kobj
,
1063 struct bin_attribute
*bin_attr
,
1064 char *buf
, loff_t off
, size_t count
)
1066 struct pci_dev
*pdev
= to_pci_dev(container_of(kobj
, struct device
, kobj
));
1070 if (!pdev
->rom_attr_enabled
)
1073 rom
= pci_map_rom(pdev
, &size
); /* size starts out as PCI window size */
1080 if (off
+ count
> size
)
1083 memcpy_fromio(buf
, rom
+ off
, count
);
1085 pci_unmap_rom(pdev
, rom
);
1090 static struct bin_attribute pci_config_attr
= {
1093 .mode
= S_IRUGO
| S_IWUSR
,
1095 .size
= PCI_CFG_SPACE_SIZE
,
1096 .read
= pci_read_config
,
1097 .write
= pci_write_config
,
1100 static struct bin_attribute pcie_config_attr
= {
1103 .mode
= S_IRUGO
| S_IWUSR
,
1105 .size
= PCI_CFG_SPACE_EXP_SIZE
,
1106 .read
= pci_read_config
,
1107 .write
= pci_write_config
,
1110 int __attribute__ ((weak
)) pcibios_add_platform_entries(struct pci_dev
*dev
)
1115 static ssize_t
reset_store(struct device
*dev
,
1116 struct device_attribute
*attr
, const char *buf
,
1119 struct pci_dev
*pdev
= to_pci_dev(dev
);
1121 ssize_t result
= strict_strtoul(buf
, 0, &val
);
1129 result
= pci_reset_function(pdev
);
1136 static struct device_attribute reset_attr
= __ATTR(reset
, 0200, NULL
, reset_store
);
1138 static int pci_create_capabilities_sysfs(struct pci_dev
*dev
)
1141 struct bin_attribute
*attr
;
1143 /* If the device has VPD, try to expose it in sysfs. */
1145 attr
= kzalloc(sizeof(*attr
), GFP_ATOMIC
);
1149 sysfs_bin_attr_init(attr
);
1150 attr
->size
= dev
->vpd
->len
;
1151 attr
->attr
.name
= "vpd";
1152 attr
->attr
.mode
= S_IRUSR
| S_IWUSR
;
1153 attr
->read
= read_vpd_attr
;
1154 attr
->write
= write_vpd_attr
;
1155 retval
= sysfs_create_bin_file(&dev
->dev
.kobj
, attr
);
1160 dev
->vpd
->attr
= attr
;
1163 /* Active State Power Management */
1164 pcie_aspm_create_sysfs_dev_files(dev
);
1166 if (!pci_probe_reset_function(dev
)) {
1167 retval
= device_create_file(&dev
->dev
, &reset_attr
);
1175 pcie_aspm_remove_sysfs_dev_files(dev
);
1176 if (dev
->vpd
&& dev
->vpd
->attr
) {
1177 sysfs_remove_bin_file(&dev
->dev
.kobj
, dev
->vpd
->attr
);
1178 kfree(dev
->vpd
->attr
);
1184 int __must_check
pci_create_sysfs_dev_files (struct pci_dev
*pdev
)
1188 struct bin_attribute
*attr
;
1190 if (!sysfs_initialized
)
1193 if (pdev
->cfg_size
< PCI_CFG_SPACE_EXP_SIZE
)
1194 retval
= sysfs_create_bin_file(&pdev
->dev
.kobj
, &pci_config_attr
);
1196 retval
= sysfs_create_bin_file(&pdev
->dev
.kobj
, &pcie_config_attr
);
1200 retval
= pci_create_resource_files(pdev
);
1202 goto err_config_file
;
1204 if (pci_resource_len(pdev
, PCI_ROM_RESOURCE
))
1205 rom_size
= pci_resource_len(pdev
, PCI_ROM_RESOURCE
);
1206 else if (pdev
->resource
[PCI_ROM_RESOURCE
].flags
& IORESOURCE_ROM_SHADOW
)
1209 /* If the device has a ROM, try to expose it in sysfs. */
1211 attr
= kzalloc(sizeof(*attr
), GFP_ATOMIC
);
1214 goto err_resource_files
;
1216 sysfs_bin_attr_init(attr
);
1217 attr
->size
= rom_size
;
1218 attr
->attr
.name
= "rom";
1219 attr
->attr
.mode
= S_IRUSR
| S_IWUSR
;
1220 attr
->read
= pci_read_rom
;
1221 attr
->write
= pci_write_rom
;
1222 retval
= sysfs_create_bin_file(&pdev
->dev
.kobj
, attr
);
1225 goto err_resource_files
;
1227 pdev
->rom_attr
= attr
;
1230 if ((pdev
->class >> 8) == PCI_CLASS_DISPLAY_VGA
) {
1231 retval
= device_create_file(&pdev
->dev
, &vga_attr
);
1236 /* add platform-specific attributes */
1237 retval
= pcibios_add_platform_entries(pdev
);
1241 /* add sysfs entries for various capabilities */
1242 retval
= pci_create_capabilities_sysfs(pdev
);
1246 pci_create_firmware_label_files(pdev
);
1251 if ((pdev
->class >> 8) == PCI_CLASS_DISPLAY_VGA
)
1252 device_remove_file(&pdev
->dev
, &vga_attr
);
1255 sysfs_remove_bin_file(&pdev
->dev
.kobj
, pdev
->rom_attr
);
1256 kfree(pdev
->rom_attr
);
1257 pdev
->rom_attr
= NULL
;
1260 pci_remove_resource_files(pdev
);
1262 if (pdev
->cfg_size
< PCI_CFG_SPACE_EXP_SIZE
)
1263 sysfs_remove_bin_file(&pdev
->dev
.kobj
, &pci_config_attr
);
1265 sysfs_remove_bin_file(&pdev
->dev
.kobj
, &pcie_config_attr
);
1270 static void pci_remove_capabilities_sysfs(struct pci_dev
*dev
)
1272 if (dev
->vpd
&& dev
->vpd
->attr
) {
1273 sysfs_remove_bin_file(&dev
->dev
.kobj
, dev
->vpd
->attr
);
1274 kfree(dev
->vpd
->attr
);
1277 pcie_aspm_remove_sysfs_dev_files(dev
);
1278 if (dev
->reset_fn
) {
1279 device_remove_file(&dev
->dev
, &reset_attr
);
1285 * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files
1286 * @pdev: device whose entries we should free
1288 * Cleanup when @pdev is removed from sysfs.
1290 void pci_remove_sysfs_dev_files(struct pci_dev
*pdev
)
1294 if (!sysfs_initialized
)
1297 pci_remove_capabilities_sysfs(pdev
);
1299 if (pdev
->cfg_size
< PCI_CFG_SPACE_EXP_SIZE
)
1300 sysfs_remove_bin_file(&pdev
->dev
.kobj
, &pci_config_attr
);
1302 sysfs_remove_bin_file(&pdev
->dev
.kobj
, &pcie_config_attr
);
1304 pci_remove_resource_files(pdev
);
1306 if (pci_resource_len(pdev
, PCI_ROM_RESOURCE
))
1307 rom_size
= pci_resource_len(pdev
, PCI_ROM_RESOURCE
);
1308 else if (pdev
->resource
[PCI_ROM_RESOURCE
].flags
& IORESOURCE_ROM_SHADOW
)
1311 if (rom_size
&& pdev
->rom_attr
) {
1312 sysfs_remove_bin_file(&pdev
->dev
.kobj
, pdev
->rom_attr
);
1313 kfree(pdev
->rom_attr
);
1316 pci_remove_firmware_label_files(pdev
);
1320 static int __init
pci_sysfs_init(void)
1322 struct pci_dev
*pdev
= NULL
;
1325 sysfs_initialized
= 1;
1326 for_each_pci_dev(pdev
) {
1327 retval
= pci_create_sysfs_dev_files(pdev
);
1337 late_initcall(pci_sysfs_init
);