drivers/pci/pci-sysfs.c

   1 /*
   2  * drivers/pci/pci-sysfs.c
   3  *
   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>
  10  *
  11  * File attributes for PCI devices
  12  *
  13  * Modeled after usb's driverfs.c
  14  *
  15  */
  16
  17
  18 #include <linux/kernel.h>
  19 #include <linux/pci.h>
  20 #include <linux/stat.h>
  21 #include <linux/topology.h>
  22 #include <linux/mm.h>
  23 #include <linux/capability.h>
  24 #include "pci.h"
  25
  26 static int sysfs_initialized;   /* = 0 */
  27
  28 /* show configuration fields */
  29 #define pci_config_attr(field, format_string)                           \
  30 static ssize_t                                                          \
  31 field##_show(struct device *dev, struct device_attribute *attr, char *buf)                              \
  32 {                                                                       \
  33         struct pci_dev *pdev;                                           \
  34                                                                         \
  35         pdev = to_pci_dev (dev);                                        \
  36         return sprintf (buf, format_string, pdev->field);               \
  37 }
  38
  39 pci_config_attr(vendor, "0x%04x\n");
  40 pci_config_attr(device, "0x%04x\n");
  41 pci_config_attr(subsystem_vendor, "0x%04x\n");
  42 pci_config_attr(subsystem_device, "0x%04x\n");
  43 pci_config_attr(class, "0x%06x\n");
  44 pci_config_attr(irq, "%u\n");
  45
  46 static ssize_t broken_parity_status_show(struct device *dev,
  47                                          struct device_attribute *attr,
  48                                          char *buf)
  49 {
  50         struct pci_dev *pdev = to_pci_dev(dev);
  51         return sprintf (buf, "%u\n", pdev->broken_parity_status);
  52 }
  53
  54 static ssize_t broken_parity_status_store(struct device *dev,
  55                                           struct device_attribute *attr,
  56                                           const char *buf, size_t count)
  57 {
  58         struct pci_dev *pdev = to_pci_dev(dev);
  59         ssize_t consumed = -EINVAL;
  60
  61         if ((count > 0) && (*buf == '0' || *buf == '1')) {
  62                 pdev->broken_parity_status = *buf == '1' ? 1 : 0;
  63                 consumed = count;
  64         }
  65         return consumed;
  66 }
  67
  68 static ssize_t local_cpus_show(struct device *dev,
  69                         struct device_attribute *attr, char *buf)
  70 {
  71         cpumask_t mask;
  72         int len;
  73
  74         mask = pcibus_to_cpumask(to_pci_dev(dev)->bus);
  75         len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask);
  76         strcat(buf,"\n");
  77         return 1+len;
  78 }
  79
  80 /* show resources */
  81 static ssize_t
  82 resource_show(struct device * dev, struct device_attribute *attr, char * buf)
  83 {
  84         struct pci_dev * pci_dev = to_pci_dev(dev);
  85         char * str = buf;
  86         int i;
  87         int max = 7;
  88         resource_size_t start, end;
  89
  90         if (pci_dev->subordinate)
  91                 max = DEVICE_COUNT_RESOURCE;
  92
  93         for (i = 0; i < max; i++) {
  94                 struct resource *res =  &pci_dev->resource[i];
  95                 pci_resource_to_user(pci_dev, i, res, &start, &end);
  96                 str += sprintf(str,"0x%016llx 0x%016llx 0x%016llx\n",
  97                                (unsigned long long)start,
  98                                (unsigned long long)end,
  99                                (unsigned long long)res->flags);
 100         }
 101         return (str - buf);
 102 }
 103
 104 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
 105 {
 106         struct pci_dev *pci_dev = to_pci_dev(dev);
 107
 108         return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n",
 109                        pci_dev->vendor, pci_dev->device,
 110                        pci_dev->subsystem_vendor, pci_dev->subsystem_device,
 111                        (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8),
 112                        (u8)(pci_dev->class));
 113 }
 114
 115 static ssize_t is_enabled_store(struct device *dev,
 116                                 struct device_attribute *attr, const char *buf,
 117                                 size_t count)
 118 {
 119         ssize_t result = -EINVAL;
 120         struct pci_dev *pdev = to_pci_dev(dev);
 121
 122         /* this can crash the machine when done on the "wrong" device */
 123         if (!capable(CAP_SYS_ADMIN))
 124                 return count;
 125
 126         if (*buf == '0') {
 127                 if (atomic_read(&pdev->enable_cnt) != 0)
 128                         pci_disable_device(pdev);
 129                 else
 130                         result = -EIO;
 131         } else if (*buf == '1')
 132                 result = pci_enable_device(pdev);
 133
 134         return result < 0 ? result : count;
 135 }
 136
 137 static ssize_t is_enabled_show(struct device *dev,
 138                                struct device_attribute *attr, char *buf)
 139 {
 140         struct pci_dev *pdev;
 141
 142         pdev = to_pci_dev (dev);
 143         return sprintf (buf, "%u\n", atomic_read(&pdev->enable_cnt));
 144 }
 145
 146 #ifdef CONFIG_NUMA
 147 static ssize_t
 148 numa_node_show(struct device *dev, struct device_attribute *attr, char *buf)
 149 {
 150         return sprintf (buf, "%d\n", dev->numa_node);
 151 }
 152 #endif
 153
 154 static ssize_t
 155 msi_bus_show(struct device *dev, struct device_attribute *attr, char *buf)
 156 {
 157         struct pci_dev *pdev = to_pci_dev(dev);
 158
 159         if (!pdev->subordinate)
 160                 return 0;
 161
 162         return sprintf (buf, "%u\n",
 163                         !(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI));
 164 }
 165
 166 static ssize_t
 167 msi_bus_store(struct device *dev, struct device_attribute *attr,
 168               const char *buf, size_t count)
 169 {
 170         struct pci_dev *pdev = to_pci_dev(dev);
 171
 172         /* bad things may happen if the no_msi flag is changed
 173          * while some drivers are loaded */
 174         if (!capable(CAP_SYS_ADMIN))
 175                 return count;
 176
 177         if (!pdev->subordinate)
 178                 return count;
 179
 180         if (*buf == '0') {
 181                 pdev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
 182                 dev_warn(&pdev->dev, "forced subordinate bus to not support MSI,"
 183                          " bad things could happen.\n");
 184         }
 185
 186         if (*buf == '1') {
 187                 pdev->subordinate->bus_flags &= ~PCI_BUS_FLAGS_NO_MSI;
 188                 dev_warn(&pdev->dev, "forced subordinate bus to support MSI,"
 189                          " bad things could happen.\n");
 190         }
 191
 192         return count;
 193 }
 194
 195 struct device_attribute pci_dev_attrs[] = {
 196         __ATTR_RO(resource),
 197         __ATTR_RO(vendor),
 198         __ATTR_RO(device),
 199         __ATTR_RO(subsystem_vendor),
 200         __ATTR_RO(subsystem_device),
 201         __ATTR_RO(class),
 202         __ATTR_RO(irq),
 203         __ATTR_RO(local_cpus),
 204         __ATTR_RO(modalias),
 205 #ifdef CONFIG_NUMA
 206         __ATTR_RO(numa_node),
 207 #endif
 208         __ATTR(enable, 0600, is_enabled_show, is_enabled_store),
 209         __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR),
 210                 broken_parity_status_show,broken_parity_status_store),
 211         __ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store),
 212         __ATTR_NULL,
 213 };
 214
 215 static ssize_t
 216 pci_read_config(struct kobject *kobj, struct bin_attribute *bin_attr,
 217                 char *buf, loff_t off, size_t count)
 218 {
 219         struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
 220         unsigned int size = 64;
 221         loff_t init_off = off;
 222         u8 *data = (u8*) buf;
 223
 224         /* Several chips lock up trying to read undefined config space */
 225         if (capable(CAP_SYS_ADMIN)) {
 226                 size = dev->cfg_size;
 227         } else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
 228                 size = 128;
 229         }
 230
 231         if (off > size)
 232                 return 0;
 233         if (off + count > size) {
 234                 size -= off;
 235                 count = size;
 236         } else {
 237                 size = count;
 238         }
 239
 240         if ((off & 1) && size) {
 241                 u8 val;
 242                 pci_user_read_config_byte(dev, off, &val);
 243                 data[off - init_off] = val;
 244                 off++;
 245                 size--;
 246         }
 247
 248         if ((off & 3) && size > 2) {
 249                 u16 val;
 250                 pci_user_read_config_word(dev, off, &val);
 251                 data[off - init_off] = val & 0xff;
 252                 data[off - init_off + 1] = (val >> 8) & 0xff;
 253                 off += 2;
 254                 size -= 2;
 255         }
 256
 257         while (size > 3) {
 258                 u32 val;
 259                 pci_user_read_config_dword(dev, off, &val);
 260                 data[off - init_off] = val & 0xff;
 261                 data[off - init_off + 1] = (val >> 8) & 0xff;
 262                 data[off - init_off + 2] = (val >> 16) & 0xff;
 263                 data[off - init_off + 3] = (val >> 24) & 0xff;
 264                 off += 4;
 265                 size -= 4;
 266         }
 267
 268         if (size >= 2) {
 269                 u16 val;
 270                 pci_user_read_config_word(dev, off, &val);
 271                 data[off - init_off] = val & 0xff;
 272                 data[off - init_off + 1] = (val >> 8) & 0xff;
 273                 off += 2;
 274                 size -= 2;
 275         }
 276
 277         if (size > 0) {
 278                 u8 val;
 279                 pci_user_read_config_byte(dev, off, &val);
 280                 data[off - init_off] = val;
 281                 off++;
 282                 --size;
 283         }
 284
 285         return count;
 286 }
 287
 288 static ssize_t
 289 pci_write_config(struct kobject *kobj, struct bin_attribute *bin_attr,
 290                  char *buf, loff_t off, size_t count)
 291 {
 292         struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
 293         unsigned int size = count;
 294         loff_t init_off = off;
 295         u8 *data = (u8*) buf;
 296
 297         if (off > dev->cfg_size)
 298                 return 0;
 299         if (off + count > dev->cfg_size) {
 300                 size = dev->cfg_size - off;
 301                 count = size;
 302         }
 303
 304         if ((off & 1) && size) {
 305                 pci_user_write_config_byte(dev, off, data[off - init_off]);
 306                 off++;
 307                 size--;
 308         }
 309
 310         if ((off & 3) && size > 2) {
 311                 u16 val = data[off - init_off];
 312                 val |= (u16) data[off - init_off + 1] << 8;
 313                 pci_user_write_config_word(dev, off, val);
 314                 off += 2;
 315                 size -= 2;
 316         }
 317
 318         while (size > 3) {
 319                 u32 val = data[off - init_off];
 320                 val |= (u32) data[off - init_off + 1] << 8;
 321                 val |= (u32) data[off - init_off + 2] << 16;
 322                 val |= (u32) data[off - init_off + 3] << 24;
 323                 pci_user_write_config_dword(dev, off, val);
 324                 off += 4;
 325                 size -= 4;
 326         }
 327
 328         if (size >= 2) {
 329                 u16 val = data[off - init_off];
 330                 val |= (u16) data[off - init_off + 1] << 8;
 331                 pci_user_write_config_word(dev, off, val);
 332                 off += 2;
 333                 size -= 2;
 334         }
 335
 336         if (size) {
 337                 pci_user_write_config_byte(dev, off, data[off - init_off]);
 338                 off++;
 339                 --size;
 340         }
 341
 342         return count;
 343 }
 344
 345 #ifdef HAVE_PCI_LEGACY
 346 /**
 347  * pci_read_legacy_io - read byte(s) from legacy I/O port space
 348  * @kobj: kobject corresponding to file to read from
 349  * @buf: buffer to store results
 350  * @off: offset into legacy I/O port space
 351  * @count: number of bytes to read
 352  *
 353  * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific
 354  * callback routine (pci_legacy_read).
 355  */
 356 ssize_t
 357 pci_read_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr,
 358                    char *buf, loff_t off, size_t count)
 359 {
 360         struct pci_bus *bus = to_pci_bus(container_of(kobj,
 361                                                       struct device,
 362                                                       kobj));
 363
 364         /* Only support 1, 2 or 4 byte accesses */
 365         if (count != 1 && count != 2 && count != 4)
 366                 return -EINVAL;
 367
 368         return pci_legacy_read(bus, off, (u32 *)buf, count);
 369 }
 370
 371 /**
 372  * pci_write_legacy_io - write byte(s) to legacy I/O port space
 373  * @kobj: kobject corresponding to file to read from
 374  * @buf: buffer containing value to be written
 375  * @off: offset into legacy I/O port space
 376  * @count: number of bytes to write
 377  *
 378  * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific
 379  * callback routine (pci_legacy_write).
 380  */
 381 ssize_t
 382 pci_write_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr,
 383                     char *buf, loff_t off, size_t count)
 384 {
 385         struct pci_bus *bus = to_pci_bus(container_of(kobj,
 386                                                       struct device,
 387                                                       kobj));
 388         /* Only support 1, 2 or 4 byte accesses */
 389         if (count != 1 && count != 2 && count != 4)
 390                 return -EINVAL;
 391
 392         return pci_legacy_write(bus, off, *(u32 *)buf, count);
 393 }
 394
 395 /**
 396  * pci_mmap_legacy_mem - map legacy PCI memory into user memory space
 397  * @kobj: kobject corresponding to device to be mapped
 398  * @attr: struct bin_attribute for this file
 399  * @vma: struct vm_area_struct passed to mmap
 400  *
 401  * Uses an arch specific callback, pci_mmap_legacy_page_range, to mmap
 402  * legacy memory space (first meg of bus space) into application virtual
 403  * memory space.
 404  */
 405 int
 406 pci_mmap_legacy_mem(struct kobject *kobj, struct bin_attribute *attr,
 407                     struct vm_area_struct *vma)
 408 {
 409         struct pci_bus *bus = to_pci_bus(container_of(kobj,
 410                                                       struct device,
 411                                                       kobj));
 412
 413         return pci_mmap_legacy_page_range(bus, vma);
 414 }
 415 #endif /* HAVE_PCI_LEGACY */
 416
 417 #ifdef HAVE_PCI_MMAP
 418 /**
 419  * pci_mmap_resource - map a PCI resource into user memory space
 420  * @kobj: kobject for mapping
 421  * @attr: struct bin_attribute for the file being mapped
 422  * @vma: struct vm_area_struct passed into the mmap
 423  *
 424  * Use the regular PCI mapping routines to map a PCI resource into userspace.
 425  * FIXME: write combining?  maybe automatic for prefetchable regions?
 426  */
 427 static int
 428 pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
 429                   struct vm_area_struct *vma)
 430 {
 431         struct pci_dev *pdev = to_pci_dev(container_of(kobj,
 432                                                        struct device, kobj));
 433         struct resource *res = (struct resource *)attr->private;
 434         enum pci_mmap_state mmap_type;
 435         resource_size_t start, end;
 436         int i;
 437
 438         for (i = 0; i < PCI_ROM_RESOURCE; i++)
 439                 if (res == &pdev->resource[i])
 440                         break;
 441         if (i >= PCI_ROM_RESOURCE)
 442                 return -ENODEV;
 443
 444         /* pci_mmap_page_range() expects the same kind of entry as coming
 445          * from /proc/bus/pci/ which is a "user visible" value. If this is
 446          * different from the resource itself, arch will do necessary fixup.
 447          */
 448         pci_resource_to_user(pdev, i, res, &start, &end);
 449         vma->vm_pgoff += start >> PAGE_SHIFT;
 450         mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;
 451
 452         return pci_mmap_page_range(pdev, vma, mmap_type, 0);
 453 }
 454
 455 /**
 456  * pci_remove_resource_files - cleanup resource files
 457  * @dev: dev to cleanup
 458  *
 459  * If we created resource files for @dev, remove them from sysfs and
 460  * free their resources.
 461  */
 462 static void
 463 pci_remove_resource_files(struct pci_dev *pdev)
 464 {
 465         int i;
 466
 467         for (i = 0; i < PCI_ROM_RESOURCE; i++) {
 468                 struct bin_attribute *res_attr;
 469
 470                 res_attr = pdev->res_attr[i];
 471                 if (res_attr) {
 472                         sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
 473                         kfree(res_attr);
 474                 }
 475         }
 476 }
 477
 478 /**
 479  * pci_create_resource_files - create resource files in sysfs for @dev
 480  * @dev: dev in question
 481  *
 482  * Walk the resources in @dev creating files for each resource available.
 483  */
 484 static int pci_create_resource_files(struct pci_dev *pdev)
 485 {
 486         int i;
 487         int retval;
 488
 489         /* Expose the PCI resources from this device as files */
 490         for (i = 0; i < PCI_ROM_RESOURCE; i++) {
 491                 struct bin_attribute *res_attr;
 492
 493                 /* skip empty resources */
 494                 if (!pci_resource_len(pdev, i))
 495                         continue;
 496
 497                 /* allocate attribute structure, piggyback attribute name */
 498                 res_attr = kzalloc(sizeof(*res_attr) + 10, GFP_ATOMIC);
 499                 if (res_attr) {
 500                         char *res_attr_name = (char *)(res_attr + 1);
 501
 502                         pdev->res_attr[i] = res_attr;
 503                         sprintf(res_attr_name, "resource%d", i);
 504                         res_attr->attr.name = res_attr_name;
 505                         res_attr->attr.mode = S_IRUSR | S_IWUSR;
 506                         res_attr->size = pci_resource_len(pdev, i);
 507                         res_attr->mmap = pci_mmap_resource;
 508                         res_attr->private = &pdev->resource[i];
 509                         retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr);
 510                         if (retval) {
 511                                 pci_remove_resource_files(pdev);
 512                                 return retval;
 513                         }
 514                 } else {
 515                         return -ENOMEM;
 516                 }
 517         }
 518         return 0;
 519 }
 520 #else /* !HAVE_PCI_MMAP */
 521 static inline int pci_create_resource_files(struct pci_dev *dev) { return 0; }
 522 static inline void pci_remove_resource_files(struct pci_dev *dev) { return; }
 523 #endif /* HAVE_PCI_MMAP */
 524
 525 /**
 526  * pci_write_rom - used to enable access to the PCI ROM display
 527  * @kobj: kernel object handle
 528  * @buf: user input
 529  * @off: file offset
 530  * @count: number of byte in input
 531  *
 532  * writing anything except 0 enables it
 533  */
 534 static ssize_t
 535 pci_write_rom(struct kobject *kobj, struct bin_attribute *bin_attr,
 536               char *buf, loff_t off, size_t count)
 537 {
 538         struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
 539
 540         if ((off ==  0) && (*buf == '0') && (count == 2))
 541                 pdev->rom_attr_enabled = 0;
 542         else
 543                 pdev->rom_attr_enabled = 1;
 544
 545         return count;
 546 }
 547
 548 /**
 549  * pci_read_rom - read a PCI ROM
 550  * @kobj: kernel object handle
 551  * @buf: where to put the data we read from the ROM
 552  * @off: file offset
 553  * @count: number of bytes to read
 554  *
 555  * Put @count bytes starting at @off into @buf from the ROM in the PCI
 556  * device corresponding to @kobj.
 557  */
 558 static ssize_t
 559 pci_read_rom(struct kobject *kobj, struct bin_attribute *bin_attr,
 560              char *buf, loff_t off, size_t count)
 561 {
 562         struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
 563         void __iomem *rom;
 564         size_t size;
 565
 566         if (!pdev->rom_attr_enabled)
 567                 return -EINVAL;
 568
 569         rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */
 570         if (!rom)
 571                 return 0;
 572
 573         if (off >= size)
 574                 count = 0;
 575         else {
 576                 if (off + count > size)
 577                         count = size - off;
 578
 579                 memcpy_fromio(buf, rom + off, count);
 580         }
 581         pci_unmap_rom(pdev, rom);
 582
 583         return count;
 584 }
 585
 586 static struct bin_attribute pci_config_attr = {
 587         .attr = {
 588                 .name = "config",
 589                 .mode = S_IRUGO | S_IWUSR,
 590         },
 591         .size = 256,
 592         .read = pci_read_config,
 593         .write = pci_write_config,
 594 };
 595
 596 static struct bin_attribute pcie_config_attr = {
 597         .attr = {
 598                 .name = "config",
 599                 .mode = S_IRUGO | S_IWUSR,
 600         },
 601         .size = 4096,
 602         .read = pci_read_config,
 603         .write = pci_write_config,
 604 };
 605
 606 int __attribute__ ((weak)) pcibios_add_platform_entries(struct pci_dev *dev)
 607 {
 608         return 0;
 609 }
 610
 611 int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
 612 {
 613         struct bin_attribute *rom_attr = NULL;
 614         int retval;
 615
 616         if (!sysfs_initialized)
 617                 return -EACCES;
 618
 619         if (pdev->cfg_size < 4096)
 620                 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr);
 621         else
 622                 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr);
 623         if (retval)
 624                 goto err;
 625
 626         retval = pci_create_resource_files(pdev);
 627         if (retval)
 628                 goto err_bin_file;
 629
 630         /* If the device has a ROM, try to expose it in sysfs. */
 631         if (pci_resource_len(pdev, PCI_ROM_RESOURCE) ||
 632             (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)) {
 633                 rom_attr = kzalloc(sizeof(*rom_attr), GFP_ATOMIC);
 634                 if (rom_attr) {
 635                         pdev->rom_attr = rom_attr;
 636                         rom_attr->size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
 637                         rom_attr->attr.name = "rom";
 638                         rom_attr->attr.mode = S_IRUSR;
 639                         rom_attr->read = pci_read_rom;
 640                         rom_attr->write = pci_write_rom;
 641                         retval = sysfs_create_bin_file(&pdev->dev.kobj, rom_attr);
 642                         if (retval)
 643                                 goto err_rom;
 644                 } else {
 645                         retval = -ENOMEM;
 646                         goto err_resource_files;
 647                 }
 648         }
 649         /* add platform-specific attributes */
 650         if (pcibios_add_platform_entries(pdev))
 651                 goto err_rom_file;
 652
 653         return 0;
 654
 655 err_rom_file:
 656         if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
 657                 sysfs_remove_bin_file(&pdev->dev.kobj, rom_attr);
 658 err_rom:
 659         kfree(rom_attr);
 660 err_resource_files:
 661         pci_remove_resource_files(pdev);
 662 err_bin_file:
 663         if (pdev->cfg_size < 4096)
 664                 sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
 665         else
 666                 sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
 667 err:
 668         return retval;
 669 }
 670
 671 /**
 672  * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files
 673  * @pdev: device whose entries we should free
 674  *
 675  * Cleanup when @pdev is removed from sysfs.
 676  */
 677 void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
 678 {
 679         if (!sysfs_initialized)
 680                 return;
 681
 682         if (pdev->cfg_size < 4096)
 683                 sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
 684         else
 685                 sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
 686
 687         pci_remove_resource_files(pdev);
 688
 689         if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) {
 690                 if (pdev->rom_attr) {
 691                         sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
 692                         kfree(pdev->rom_attr);
 693                 }
 694         }
 695 }
 696
 697 static int __init pci_sysfs_init(void)
 698 {
 699         struct pci_dev *pdev = NULL;
 700         int retval;
 701
 702         sysfs_initialized = 1;
 703         for_each_pci_dev(pdev) {
 704                 retval = pci_create_sysfs_dev_files(pdev);
 705                 if (retval) {
 706                         pci_dev_put(pdev);
 707                         return retval;
 708                 }
 709         }
 710
 711         return 0;
 712 }
 713
 714 late_initcall(pci_sysfs_init);