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>
30 #include <linux/vgaarb.h>
31 #include <linux/pm_runtime.h>
34 static int sysfs_initialized; /* = 0 */
36 /* show configuration fields */
37 #define pci_config_attr(field, format_string) \
39 field##_show(struct device *dev, struct device_attribute *attr, char *buf) \
41 struct pci_dev *pdev; \
43 pdev = to_pci_dev (dev); \
44 return sprintf (buf, format_string, pdev->field); \
47 pci_config_attr(vendor, "0x%04x\n");
48 pci_config_attr(device, "0x%04x\n");
49 pci_config_attr(subsystem_vendor, "0x%04x\n");
50 pci_config_attr(subsystem_device, "0x%04x\n");
51 pci_config_attr(class, "0x%06x\n");
52 pci_config_attr(irq, "%u\n");
54 static ssize_t broken_parity_status_show(struct device *dev,
55 struct device_attribute *attr,
58 struct pci_dev *pdev = to_pci_dev(dev);
59 return sprintf (buf, "%u\n", pdev->broken_parity_status);
62 static ssize_t broken_parity_status_store(struct device *dev,
63 struct device_attribute *attr,
64 const char *buf, size_t count)
66 struct pci_dev *pdev = to_pci_dev(dev);
69 if (strict_strtoul(buf, 0, &val) < 0)
72 pdev->broken_parity_status = !!val;
77 static ssize_t local_cpus_show(struct device *dev,
78 struct device_attribute *attr, char *buf)
80 const struct cpumask *mask;
84 mask = (dev_to_node(dev) == -1) ? cpu_online_mask :
85 cpumask_of_node(dev_to_node(dev));
87 mask = cpumask_of_pcibus(to_pci_dev(dev)->bus);
89 len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask);
96 static ssize_t local_cpulist_show(struct device *dev,
97 struct device_attribute *attr, char *buf)
99 const struct cpumask *mask;
103 mask = (dev_to_node(dev) == -1) ? cpu_online_mask :
104 cpumask_of_node(dev_to_node(dev));
106 mask = cpumask_of_pcibus(to_pci_dev(dev)->bus);
108 len = cpulist_scnprintf(buf, PAGE_SIZE-2, mask);
115 * PCI Bus Class Devices
117 static ssize_t pci_bus_show_cpuaffinity(struct device *dev,
119 struct device_attribute *attr,
123 const struct cpumask *cpumask;
125 cpumask = cpumask_of_pcibus(to_pci_bus(dev));
127 cpulist_scnprintf(buf, PAGE_SIZE-2, cpumask) :
128 cpumask_scnprintf(buf, PAGE_SIZE-2, cpumask);
134 static inline ssize_t pci_bus_show_cpumaskaffinity(struct device *dev,
135 struct device_attribute *attr,
138 return pci_bus_show_cpuaffinity(dev, 0, attr, buf);
141 static inline ssize_t pci_bus_show_cpulistaffinity(struct device *dev,
142 struct device_attribute *attr,
145 return pci_bus_show_cpuaffinity(dev, 1, attr, buf);
150 resource_show(struct device * dev, struct device_attribute *attr, char * buf)
152 struct pci_dev * pci_dev = to_pci_dev(dev);
156 resource_size_t start, end;
158 if (pci_dev->subordinate)
159 max = DEVICE_COUNT_RESOURCE;
161 max = PCI_BRIDGE_RESOURCES;
163 for (i = 0; i < max; i++) {
164 struct resource *res = &pci_dev->resource[i];
165 pci_resource_to_user(pci_dev, i, res, &start, &end);
166 str += sprintf(str,"0x%016llx 0x%016llx 0x%016llx\n",
167 (unsigned long long)start,
168 (unsigned long long)end,
169 (unsigned long long)res->flags);
174 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
176 struct pci_dev *pci_dev = to_pci_dev(dev);
178 return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n",
179 pci_dev->vendor, pci_dev->device,
180 pci_dev->subsystem_vendor, pci_dev->subsystem_device,
181 (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8),
182 (u8)(pci_dev->class));
185 static ssize_t is_enabled_store(struct device *dev,
186 struct device_attribute *attr, const char *buf,
189 struct pci_dev *pdev = to_pci_dev(dev);
191 ssize_t result = strict_strtoul(buf, 0, &val);
196 /* this can crash the machine when done on the "wrong" device */
197 if (!capable(CAP_SYS_ADMIN))
201 if (pci_is_enabled(pdev))
202 pci_disable_device(pdev);
206 result = pci_enable_device(pdev);
208 return result < 0 ? result : count;
211 static ssize_t is_enabled_show(struct device *dev,
212 struct device_attribute *attr, char *buf)
214 struct pci_dev *pdev;
216 pdev = to_pci_dev (dev);
217 return sprintf (buf, "%u\n", atomic_read(&pdev->enable_cnt));
222 numa_node_show(struct device *dev, struct device_attribute *attr, char *buf)
224 return sprintf (buf, "%d\n", dev->numa_node);
229 dma_mask_bits_show(struct device *dev, struct device_attribute *attr, char *buf)
231 struct pci_dev *pdev = to_pci_dev(dev);
233 return sprintf (buf, "%d\n", fls64(pdev->dma_mask));
237 consistent_dma_mask_bits_show(struct device *dev, struct device_attribute *attr,
240 return sprintf (buf, "%d\n", fls64(dev->coherent_dma_mask));
244 msi_bus_show(struct device *dev, struct device_attribute *attr, char *buf)
246 struct pci_dev *pdev = to_pci_dev(dev);
248 if (!pdev->subordinate)
251 return sprintf (buf, "%u\n",
252 !(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI));
256 msi_bus_store(struct device *dev, struct device_attribute *attr,
257 const char *buf, size_t count)
259 struct pci_dev *pdev = to_pci_dev(dev);
262 if (strict_strtoul(buf, 0, &val) < 0)
265 /* bad things may happen if the no_msi flag is changed
266 * while some drivers are loaded */
267 if (!capable(CAP_SYS_ADMIN))
270 /* Maybe pci devices without subordinate busses shouldn't even have this
271 * attribute in the first place? */
272 if (!pdev->subordinate)
275 /* Is the flag going to change, or keep the value it already had? */
276 if (!(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) ^
278 pdev->subordinate->bus_flags ^= PCI_BUS_FLAGS_NO_MSI;
280 dev_warn(&pdev->dev, "forced subordinate bus to%s support MSI,"
281 " bad things could happen\n", val ? "" : " not");
287 static DEFINE_MUTEX(pci_remove_rescan_mutex);
288 static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf,
292 struct pci_bus *b = NULL;
294 if (strict_strtoul(buf, 0, &val) < 0)
298 mutex_lock(&pci_remove_rescan_mutex);
299 while ((b = pci_find_next_bus(b)) != NULL)
301 mutex_unlock(&pci_remove_rescan_mutex);
306 struct bus_attribute pci_bus_attrs[] = {
307 __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store),
312 dev_rescan_store(struct device *dev, struct device_attribute *attr,
313 const char *buf, size_t count)
316 struct pci_dev *pdev = to_pci_dev(dev);
318 if (strict_strtoul(buf, 0, &val) < 0)
322 mutex_lock(&pci_remove_rescan_mutex);
323 pci_rescan_bus(pdev->bus);
324 mutex_unlock(&pci_remove_rescan_mutex);
329 static void remove_callback(struct device *dev)
331 struct pci_dev *pdev = to_pci_dev(dev);
333 mutex_lock(&pci_remove_rescan_mutex);
334 pci_stop_and_remove_bus_device(pdev);
335 mutex_unlock(&pci_remove_rescan_mutex);
339 remove_store(struct device *dev, struct device_attribute *dummy,
340 const char *buf, size_t count)
345 if (strict_strtoul(buf, 0, &val) < 0)
348 /* An attribute cannot be unregistered by one of its own methods,
349 * so we have to use this roundabout approach.
352 ret = device_schedule_callback(dev, remove_callback);
359 dev_bus_rescan_store(struct device *dev, struct device_attribute *attr,
360 const char *buf, size_t count)
363 struct pci_bus *bus = to_pci_bus(dev);
365 if (strict_strtoul(buf, 0, &val) < 0)
369 mutex_lock(&pci_remove_rescan_mutex);
370 if (!pci_is_root_bus(bus) && list_empty(&bus->devices))
371 pci_rescan_bus_bridge_resize(bus->self);
374 mutex_unlock(&pci_remove_rescan_mutex);
379 #if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI)
380 static ssize_t d3cold_allowed_store(struct device *dev,
381 struct device_attribute *attr,
382 const char *buf, size_t count)
384 struct pci_dev *pdev = to_pci_dev(dev);
387 if (strict_strtoul(buf, 0, &val) < 0)
390 pdev->d3cold_allowed = !!val;
391 pm_runtime_resume(dev);
396 static ssize_t d3cold_allowed_show(struct device *dev,
397 struct device_attribute *attr, char *buf)
399 struct pci_dev *pdev = to_pci_dev(dev);
400 return sprintf (buf, "%u\n", pdev->d3cold_allowed);
404 struct device_attribute pci_dev_attrs[] = {
408 __ATTR_RO(subsystem_vendor),
409 __ATTR_RO(subsystem_device),
412 __ATTR_RO(local_cpus),
413 __ATTR_RO(local_cpulist),
416 __ATTR_RO(numa_node),
418 __ATTR_RO(dma_mask_bits),
419 __ATTR_RO(consistent_dma_mask_bits),
420 __ATTR(enable, 0600, is_enabled_show, is_enabled_store),
421 __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR),
422 broken_parity_status_show,broken_parity_status_store),
423 __ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store),
424 __ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store),
425 __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store),
426 #if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI)
427 __ATTR(d3cold_allowed, 0644, d3cold_allowed_show, d3cold_allowed_store),
432 struct device_attribute pcibus_dev_attrs[] = {
433 __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store),
434 __ATTR(cpuaffinity, S_IRUGO, pci_bus_show_cpumaskaffinity, NULL),
435 __ATTR(cpulistaffinity, S_IRUGO, pci_bus_show_cpulistaffinity, NULL),
440 boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf)
442 struct pci_dev *pdev = to_pci_dev(dev);
443 struct pci_dev *vga_dev = vga_default_device();
446 return sprintf(buf, "%u\n", (pdev == vga_dev));
448 return sprintf(buf, "%u\n",
449 !!(pdev->resource[PCI_ROM_RESOURCE].flags &
450 IORESOURCE_ROM_SHADOW));
452 struct device_attribute vga_attr = __ATTR_RO(boot_vga);
455 pci_read_config(struct file *filp, struct kobject *kobj,
456 struct bin_attribute *bin_attr,
457 char *buf, loff_t off, size_t count)
459 struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
460 unsigned int size = 64;
461 loff_t init_off = off;
462 u8 *data = (u8*) buf;
464 /* Several chips lock up trying to read undefined config space */
465 if (security_capable(filp->f_cred, &init_user_ns, CAP_SYS_ADMIN) == 0) {
466 size = dev->cfg_size;
467 } else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
473 if (off + count > size) {
480 pci_config_pm_runtime_get(dev);
482 if ((off & 1) && size) {
484 pci_user_read_config_byte(dev, off, &val);
485 data[off - init_off] = val;
490 if ((off & 3) && size > 2) {
492 pci_user_read_config_word(dev, off, &val);
493 data[off - init_off] = val & 0xff;
494 data[off - init_off + 1] = (val >> 8) & 0xff;
501 pci_user_read_config_dword(dev, off, &val);
502 data[off - init_off] = val & 0xff;
503 data[off - init_off + 1] = (val >> 8) & 0xff;
504 data[off - init_off + 2] = (val >> 16) & 0xff;
505 data[off - init_off + 3] = (val >> 24) & 0xff;
512 pci_user_read_config_word(dev, off, &val);
513 data[off - init_off] = val & 0xff;
514 data[off - init_off + 1] = (val >> 8) & 0xff;
521 pci_user_read_config_byte(dev, off, &val);
522 data[off - init_off] = val;
527 pci_config_pm_runtime_put(dev);
533 pci_write_config(struct file* filp, struct kobject *kobj,
534 struct bin_attribute *bin_attr,
535 char *buf, loff_t off, size_t count)
537 struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
538 unsigned int size = count;
539 loff_t init_off = off;
540 u8 *data = (u8*) buf;
542 if (off > dev->cfg_size)
544 if (off + count > dev->cfg_size) {
545 size = dev->cfg_size - off;
549 pci_config_pm_runtime_get(dev);
551 if ((off & 1) && size) {
552 pci_user_write_config_byte(dev, off, data[off - init_off]);
557 if ((off & 3) && size > 2) {
558 u16 val = data[off - init_off];
559 val |= (u16) data[off - init_off + 1] << 8;
560 pci_user_write_config_word(dev, off, val);
566 u32 val = data[off - init_off];
567 val |= (u32) data[off - init_off + 1] << 8;
568 val |= (u32) data[off - init_off + 2] << 16;
569 val |= (u32) data[off - init_off + 3] << 24;
570 pci_user_write_config_dword(dev, off, val);
576 u16 val = data[off - init_off];
577 val |= (u16) data[off - init_off + 1] << 8;
578 pci_user_write_config_word(dev, off, val);
584 pci_user_write_config_byte(dev, off, data[off - init_off]);
589 pci_config_pm_runtime_put(dev);
595 read_vpd_attr(struct file *filp, struct kobject *kobj,
596 struct bin_attribute *bin_attr,
597 char *buf, loff_t off, size_t count)
599 struct pci_dev *dev =
600 to_pci_dev(container_of(kobj, struct device, kobj));
602 if (off > bin_attr->size)
604 else if (count > bin_attr->size - off)
605 count = bin_attr->size - off;
607 return pci_read_vpd(dev, off, count, buf);
611 write_vpd_attr(struct file *filp, struct kobject *kobj,
612 struct bin_attribute *bin_attr,
613 char *buf, loff_t off, size_t count)
615 struct pci_dev *dev =
616 to_pci_dev(container_of(kobj, struct device, kobj));
618 if (off > bin_attr->size)
620 else if (count > bin_attr->size - off)
621 count = bin_attr->size - off;
623 return pci_write_vpd(dev, off, count, buf);
626 #ifdef HAVE_PCI_LEGACY
628 * pci_read_legacy_io - read byte(s) from legacy I/O port space
629 * @filp: open sysfs file
630 * @kobj: kobject corresponding to file to read from
631 * @bin_attr: struct bin_attribute for this file
632 * @buf: buffer to store results
633 * @off: offset into legacy I/O port space
634 * @count: number of bytes to read
636 * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific
637 * callback routine (pci_legacy_read).
640 pci_read_legacy_io(struct file *filp, struct kobject *kobj,
641 struct bin_attribute *bin_attr,
642 char *buf, loff_t off, size_t count)
644 struct pci_bus *bus = to_pci_bus(container_of(kobj,
648 /* Only support 1, 2 or 4 byte accesses */
649 if (count != 1 && count != 2 && count != 4)
652 return pci_legacy_read(bus, off, (u32 *)buf, count);
656 * pci_write_legacy_io - write byte(s) to legacy I/O port space
657 * @filp: open sysfs file
658 * @kobj: kobject corresponding to file to read from
659 * @bin_attr: struct bin_attribute for this file
660 * @buf: buffer containing value to be written
661 * @off: offset into legacy I/O port space
662 * @count: number of bytes to write
664 * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific
665 * callback routine (pci_legacy_write).
668 pci_write_legacy_io(struct file *filp, struct kobject *kobj,
669 struct bin_attribute *bin_attr,
670 char *buf, loff_t off, size_t count)
672 struct pci_bus *bus = to_pci_bus(container_of(kobj,
675 /* Only support 1, 2 or 4 byte accesses */
676 if (count != 1 && count != 2 && count != 4)
679 return pci_legacy_write(bus, off, *(u32 *)buf, count);
683 * pci_mmap_legacy_mem - map legacy PCI memory into user memory space
684 * @filp: open sysfs file
685 * @kobj: kobject corresponding to device to be mapped
686 * @attr: struct bin_attribute for this file
687 * @vma: struct vm_area_struct passed to mmap
689 * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap
690 * legacy memory space (first meg of bus space) into application virtual
694 pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj,
695 struct bin_attribute *attr,
696 struct vm_area_struct *vma)
698 struct pci_bus *bus = to_pci_bus(container_of(kobj,
702 return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem);
706 * pci_mmap_legacy_io - map legacy PCI IO into user memory space
707 * @filp: open sysfs file
708 * @kobj: kobject corresponding to device to be mapped
709 * @attr: struct bin_attribute for this file
710 * @vma: struct vm_area_struct passed to mmap
712 * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap
713 * legacy IO space (first meg of bus space) into application virtual
714 * memory space. Returns -ENOSYS if the operation isn't supported
717 pci_mmap_legacy_io(struct file *filp, struct kobject *kobj,
718 struct bin_attribute *attr,
719 struct vm_area_struct *vma)
721 struct pci_bus *bus = to_pci_bus(container_of(kobj,
725 return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io);
729 * pci_adjust_legacy_attr - adjustment of legacy file attributes
730 * @b: bus to create files under
731 * @mmap_type: I/O port or memory
733 * Stub implementation. Can be overridden by arch if necessary.
736 pci_adjust_legacy_attr(struct pci_bus *b, enum pci_mmap_state mmap_type)
742 * pci_create_legacy_files - create legacy I/O port and memory files
743 * @b: bus to create files under
745 * Some platforms allow access to legacy I/O port and ISA memory space on
746 * a per-bus basis. This routine creates the files and ties them into
747 * their associated read, write and mmap files from pci-sysfs.c
749 * On error unwind, but don't propagate the error to the caller
750 * as it is ok to set up the PCI bus without these files.
752 void pci_create_legacy_files(struct pci_bus *b)
756 b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2,
761 sysfs_bin_attr_init(b->legacy_io);
762 b->legacy_io->attr.name = "legacy_io";
763 b->legacy_io->size = 0xffff;
764 b->legacy_io->attr.mode = S_IRUSR | S_IWUSR;
765 b->legacy_io->read = pci_read_legacy_io;
766 b->legacy_io->write = pci_write_legacy_io;
767 b->legacy_io->mmap = pci_mmap_legacy_io;
768 pci_adjust_legacy_attr(b, pci_mmap_io);
769 error = device_create_bin_file(&b->dev, b->legacy_io);
773 /* Allocated above after the legacy_io struct */
774 b->legacy_mem = b->legacy_io + 1;
775 sysfs_bin_attr_init(b->legacy_mem);
776 b->legacy_mem->attr.name = "legacy_mem";
777 b->legacy_mem->size = 1024*1024;
778 b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR;
779 b->legacy_mem->mmap = pci_mmap_legacy_mem;
780 pci_adjust_legacy_attr(b, pci_mmap_mem);
781 error = device_create_bin_file(&b->dev, b->legacy_mem);
788 device_remove_bin_file(&b->dev, b->legacy_io);
793 printk(KERN_WARNING "pci: warning: could not create legacy I/O port "
794 "and ISA memory resources to sysfs\n");
798 void pci_remove_legacy_files(struct pci_bus *b)
801 device_remove_bin_file(&b->dev, b->legacy_io);
802 device_remove_bin_file(&b->dev, b->legacy_mem);
803 kfree(b->legacy_io); /* both are allocated here */
806 #endif /* HAVE_PCI_LEGACY */
810 int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma,
811 enum pci_mmap_api mmap_api)
813 unsigned long nr, start, size, pci_start;
815 if (pci_resource_len(pdev, resno) == 0)
817 nr = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
818 start = vma->vm_pgoff;
819 size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1;
820 pci_start = (mmap_api == PCI_MMAP_PROCFS) ?
821 pci_resource_start(pdev, resno) >> PAGE_SHIFT : 0;
822 if (start >= pci_start && start < pci_start + size &&
823 start + nr <= pci_start + size)
829 * pci_mmap_resource - map a PCI resource into user memory space
830 * @kobj: kobject for mapping
831 * @attr: struct bin_attribute for the file being mapped
832 * @vma: struct vm_area_struct passed into the mmap
833 * @write_combine: 1 for write_combine mapping
835 * Use the regular PCI mapping routines to map a PCI resource into userspace.
838 pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
839 struct vm_area_struct *vma, int write_combine)
841 struct pci_dev *pdev = to_pci_dev(container_of(kobj,
842 struct device, kobj));
843 struct resource *res = attr->private;
844 enum pci_mmap_state mmap_type;
845 resource_size_t start, end;
848 for (i = 0; i < PCI_ROM_RESOURCE; i++)
849 if (res == &pdev->resource[i])
851 if (i >= PCI_ROM_RESOURCE)
854 if (!pci_mmap_fits(pdev, i, vma, PCI_MMAP_SYSFS)) {
855 WARN(1, "process \"%s\" tried to map 0x%08lx bytes "
856 "at page 0x%08lx on %s BAR %d (start 0x%16Lx, size 0x%16Lx)\n",
857 current->comm, vma->vm_end-vma->vm_start, vma->vm_pgoff,
859 (u64)pci_resource_start(pdev, i),
860 (u64)pci_resource_len(pdev, i));
864 /* pci_mmap_page_range() expects the same kind of entry as coming
865 * from /proc/bus/pci/ which is a "user visible" value. If this is
866 * different from the resource itself, arch will do necessary fixup.
868 pci_resource_to_user(pdev, i, res, &start, &end);
869 vma->vm_pgoff += start >> PAGE_SHIFT;
870 mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;
872 if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(start))
875 return pci_mmap_page_range(pdev, vma, mmap_type, write_combine);
879 pci_mmap_resource_uc(struct file *filp, struct kobject *kobj,
880 struct bin_attribute *attr,
881 struct vm_area_struct *vma)
883 return pci_mmap_resource(kobj, attr, vma, 0);
887 pci_mmap_resource_wc(struct file *filp, struct kobject *kobj,
888 struct bin_attribute *attr,
889 struct vm_area_struct *vma)
891 return pci_mmap_resource(kobj, attr, vma, 1);
895 pci_resource_io(struct file *filp, struct kobject *kobj,
896 struct bin_attribute *attr, char *buf,
897 loff_t off, size_t count, bool write)
899 struct pci_dev *pdev = to_pci_dev(container_of(kobj,
900 struct device, kobj));
901 struct resource *res = attr->private;
902 unsigned long port = off;
905 for (i = 0; i < PCI_ROM_RESOURCE; i++)
906 if (res == &pdev->resource[i])
908 if (i >= PCI_ROM_RESOURCE)
911 port += pci_resource_start(pdev, i);
913 if (port > pci_resource_end(pdev, i))
916 if (port + count - 1 > pci_resource_end(pdev, i))
922 outb(*(u8 *)buf, port);
924 *(u8 *)buf = inb(port);
928 outw(*(u16 *)buf, port);
930 *(u16 *)buf = inw(port);
934 outl(*(u32 *)buf, port);
936 *(u32 *)buf = inl(port);
943 pci_read_resource_io(struct file *filp, struct kobject *kobj,
944 struct bin_attribute *attr, char *buf,
945 loff_t off, size_t count)
947 return pci_resource_io(filp, kobj, attr, buf, off, count, false);
951 pci_write_resource_io(struct file *filp, struct kobject *kobj,
952 struct bin_attribute *attr, char *buf,
953 loff_t off, size_t count)
955 return pci_resource_io(filp, kobj, attr, buf, off, count, true);
959 * pci_remove_resource_files - cleanup resource files
960 * @pdev: dev to cleanup
962 * If we created resource files for @pdev, remove them from sysfs and
963 * free their resources.
966 pci_remove_resource_files(struct pci_dev *pdev)
970 for (i = 0; i < PCI_ROM_RESOURCE; i++) {
971 struct bin_attribute *res_attr;
973 res_attr = pdev->res_attr[i];
975 sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
979 res_attr = pdev->res_attr_wc[i];
981 sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
987 static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine)
989 /* allocate attribute structure, piggyback attribute name */
990 int name_len = write_combine ? 13 : 10;
991 struct bin_attribute *res_attr;
994 res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC);
996 char *res_attr_name = (char *)(res_attr + 1);
998 sysfs_bin_attr_init(res_attr);
1000 pdev->res_attr_wc[num] = res_attr;
1001 sprintf(res_attr_name, "resource%d_wc", num);
1002 res_attr->mmap = pci_mmap_resource_wc;
1004 pdev->res_attr[num] = res_attr;
1005 sprintf(res_attr_name, "resource%d", num);
1006 res_attr->mmap = pci_mmap_resource_uc;
1008 if (pci_resource_flags(pdev, num) & IORESOURCE_IO) {
1009 res_attr->read = pci_read_resource_io;
1010 res_attr->write = pci_write_resource_io;
1012 res_attr->attr.name = res_attr_name;
1013 res_attr->attr.mode = S_IRUSR | S_IWUSR;
1014 res_attr->size = pci_resource_len(pdev, num);
1015 res_attr->private = &pdev->resource[num];
1016 retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr);
1024 * pci_create_resource_files - create resource files in sysfs for @dev
1025 * @pdev: dev in question
1027 * Walk the resources in @pdev creating files for each resource available.
1029 static int pci_create_resource_files(struct pci_dev *pdev)
1034 /* Expose the PCI resources from this device as files */
1035 for (i = 0; i < PCI_ROM_RESOURCE; i++) {
1037 /* skip empty resources */
1038 if (!pci_resource_len(pdev, i))
1041 retval = pci_create_attr(pdev, i, 0);
1042 /* for prefetchable resources, create a WC mappable file */
1043 if (!retval && pdev->resource[i].flags & IORESOURCE_PREFETCH)
1044 retval = pci_create_attr(pdev, i, 1);
1047 pci_remove_resource_files(pdev);
1053 #else /* !HAVE_PCI_MMAP */
1054 int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; }
1055 void __weak pci_remove_resource_files(struct pci_dev *dev) { return; }
1056 #endif /* HAVE_PCI_MMAP */
1059 * pci_write_rom - used to enable access to the PCI ROM display
1061 * @kobj: kernel object handle
1062 * @bin_attr: struct bin_attribute for this file
1065 * @count: number of byte in input
1067 * writing anything except 0 enables it
1070 pci_write_rom(struct file *filp, struct kobject *kobj,
1071 struct bin_attribute *bin_attr,
1072 char *buf, loff_t off, size_t count)
1074 struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
1076 if ((off == 0) && (*buf == '0') && (count == 2))
1077 pdev->rom_attr_enabled = 0;
1079 pdev->rom_attr_enabled = 1;
1085 * pci_read_rom - read a PCI ROM
1087 * @kobj: kernel object handle
1088 * @bin_attr: struct bin_attribute for this file
1089 * @buf: where to put the data we read from the ROM
1091 * @count: number of bytes to read
1093 * Put @count bytes starting at @off into @buf from the ROM in the PCI
1094 * device corresponding to @kobj.
1097 pci_read_rom(struct file *filp, struct kobject *kobj,
1098 struct bin_attribute *bin_attr,
1099 char *buf, loff_t off, size_t count)
1101 struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
1105 if (!pdev->rom_attr_enabled)
1108 rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */
1115 if (off + count > size)
1118 memcpy_fromio(buf, rom + off, count);
1120 pci_unmap_rom(pdev, rom);
1125 static struct bin_attribute pci_config_attr = {
1128 .mode = S_IRUGO | S_IWUSR,
1130 .size = PCI_CFG_SPACE_SIZE,
1131 .read = pci_read_config,
1132 .write = pci_write_config,
1135 static struct bin_attribute pcie_config_attr = {
1138 .mode = S_IRUGO | S_IWUSR,
1140 .size = PCI_CFG_SPACE_EXP_SIZE,
1141 .read = pci_read_config,
1142 .write = pci_write_config,
1145 int __weak pcibios_add_platform_entries(struct pci_dev *dev)
1150 static ssize_t reset_store(struct device *dev,
1151 struct device_attribute *attr, const char *buf,
1154 struct pci_dev *pdev = to_pci_dev(dev);
1156 ssize_t result = strict_strtoul(buf, 0, &val);
1164 result = pci_reset_function(pdev);
1171 static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store);
1173 static int pci_create_capabilities_sysfs(struct pci_dev *dev)
1176 struct bin_attribute *attr;
1178 /* If the device has VPD, try to expose it in sysfs. */
1180 attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
1184 sysfs_bin_attr_init(attr);
1185 attr->size = dev->vpd->len;
1186 attr->attr.name = "vpd";
1187 attr->attr.mode = S_IRUSR | S_IWUSR;
1188 attr->read = read_vpd_attr;
1189 attr->write = write_vpd_attr;
1190 retval = sysfs_create_bin_file(&dev->dev.kobj, attr);
1195 dev->vpd->attr = attr;
1198 /* Active State Power Management */
1199 pcie_aspm_create_sysfs_dev_files(dev);
1201 if (!pci_probe_reset_function(dev)) {
1202 retval = device_create_file(&dev->dev, &reset_attr);
1210 pcie_aspm_remove_sysfs_dev_files(dev);
1211 if (dev->vpd && dev->vpd->attr) {
1212 sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
1213 kfree(dev->vpd->attr);
1219 int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
1223 struct bin_attribute *attr;
1225 if (!sysfs_initialized)
1228 if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
1229 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr);
1231 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr);
1235 retval = pci_create_resource_files(pdev);
1237 goto err_config_file;
1239 if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
1240 rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
1241 else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)
1244 /* If the device has a ROM, try to expose it in sysfs. */
1246 attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
1249 goto err_resource_files;
1251 sysfs_bin_attr_init(attr);
1252 attr->size = rom_size;
1253 attr->attr.name = "rom";
1254 attr->attr.mode = S_IRUSR | S_IWUSR;
1255 attr->read = pci_read_rom;
1256 attr->write = pci_write_rom;
1257 retval = sysfs_create_bin_file(&pdev->dev.kobj, attr);
1260 goto err_resource_files;
1262 pdev->rom_attr = attr;
1265 if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) {
1266 retval = device_create_file(&pdev->dev, &vga_attr);
1271 /* add platform-specific attributes */
1272 retval = pcibios_add_platform_entries(pdev);
1276 /* add sysfs entries for various capabilities */
1277 retval = pci_create_capabilities_sysfs(pdev);
1281 pci_create_firmware_label_files(pdev);
1286 if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA)
1287 device_remove_file(&pdev->dev, &vga_attr);
1290 sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
1291 kfree(pdev->rom_attr);
1292 pdev->rom_attr = NULL;
1295 pci_remove_resource_files(pdev);
1297 if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
1298 sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
1300 sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
1305 static void pci_remove_capabilities_sysfs(struct pci_dev *dev)
1307 if (dev->vpd && dev->vpd->attr) {
1308 sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
1309 kfree(dev->vpd->attr);
1312 pcie_aspm_remove_sysfs_dev_files(dev);
1313 if (dev->reset_fn) {
1314 device_remove_file(&dev->dev, &reset_attr);
1320 * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files
1321 * @pdev: device whose entries we should free
1323 * Cleanup when @pdev is removed from sysfs.
1325 void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
1329 if (!sysfs_initialized)
1332 pci_remove_capabilities_sysfs(pdev);
1334 if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
1335 sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
1337 sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
1339 pci_remove_resource_files(pdev);
1341 if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
1342 rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
1343 else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)
1346 if (rom_size && pdev->rom_attr) {
1347 sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
1348 kfree(pdev->rom_attr);
1351 pci_remove_firmware_label_files(pdev);
1355 static int __init pci_sysfs_init(void)
1357 struct pci_dev *pdev = NULL;
1360 sysfs_initialized = 1;
1361 for_each_pci_dev(pdev) {
1362 retval = pci_create_sysfs_dev_files(pdev);
1372 late_initcall(pci_sysfs_init);