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/sched.h>
  20 #include <linux/pci.h>
  21 #include <linux/stat.h>
  22 #include <linux/export.h>
  23 #include <linux/topology.h>
  24 #include <linux/mm.h>
  25 #include <linux/fs.h>
  26 #include <linux/capability.h>
  27 #include <linux/security.h>
  28 #include <linux/pci-aspm.h>
  29 #include <linux/slab.h>
  30 #include "pci.h"
  31
  32 static int sysfs_initialized;   /* = 0 */
  33
  34 /* show configuration fields */
  35 #define pci_config_attr(field, format_string)                           \
  36 static ssize_t                                                          \
  37 field##_show(struct device *dev, struct device_attribute *attr, char *buf)                              \
  38 {                                                                       \
  39         struct pci_dev *pdev;                                           \
  40                                                                         \
  41         pdev = to_pci_dev (dev);                                        \
  42         return sprintf (buf, format_string, pdev->field);               \
  43 }
  44
  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");
  51
  52 static ssize_t broken_parity_status_show(struct device *dev,
  53                                          struct device_attribute *attr,
  54                                          char *buf)
  55 {
  56         struct pci_dev *pdev = to_pci_dev(dev);
  57         return sprintf (buf, "%u\n", pdev->broken_parity_status);
  58 }
  59
  60 static ssize_t broken_parity_status_store(struct device *dev,
  61                                           struct device_attribute *attr,
  62                                           const char *buf, size_t count)
  63 {
  64         struct pci_dev *pdev = to_pci_dev(dev);
  65         unsigned long val;
  66
  67         if (strict_strtoul(buf, 0, &val) < 0)
  68                 return -EINVAL;
  69
  70         pdev->broken_parity_status = !!val;
  71
  72         return count;
  73 }
  74
  75 static ssize_t local_cpus_show(struct device *dev,
  76                         struct device_attribute *attr, char *buf)
  77 {
  78         const struct cpumask *mask;
  79         int len;
  80
  81 #ifdef CONFIG_NUMA
  82         mask = (dev_to_node(dev) == -1) ? cpu_online_mask :
  83                                           cpumask_of_node(dev_to_node(dev));
  84 #else
  85         mask = cpumask_of_pcibus(to_pci_dev(dev)->bus);
  86 #endif
  87         len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask);
  88         buf[len++] = '\n';
  89         buf[len] = '\0';
  90         return len;
  91 }
  92
  93
  94 static ssize_t local_cpulist_show(struct device *dev,
  95                         struct device_attribute *attr, char *buf)
  96 {
  97         const struct cpumask *mask;
  98         int len;
  99
 100 #ifdef CONFIG_NUMA
 101         mask = (dev_to_node(dev) == -1) ? cpu_online_mask :
 102                                           cpumask_of_node(dev_to_node(dev));
 103 #else
 104         mask = cpumask_of_pcibus(to_pci_dev(dev)->bus);
 105 #endif
 106         len = cpulist_scnprintf(buf, PAGE_SIZE-2, mask);
 107         buf[len++] = '\n';
 108         buf[len] = '\0';
 109         return len;
 110 }
 111
 112 /*
 113  * PCI Bus Class Devices
 114  */
 115 static ssize_t pci_bus_show_cpuaffinity(struct device *dev,
 116                                         int type,
 117                                         struct device_attribute *attr,
 118                                         char *buf)
 119 {
 120         int ret;
 121         const struct cpumask *cpumask;
 122
 123         cpumask = cpumask_of_pcibus(to_pci_bus(dev));
 124         ret = type ?
 125                 cpulist_scnprintf(buf, PAGE_SIZE-2, cpumask) :
 126                 cpumask_scnprintf(buf, PAGE_SIZE-2, cpumask);
 127         buf[ret++] = '\n';
 128         buf[ret] = '\0';
 129         return ret;
 130 }
 131
 132 static inline ssize_t pci_bus_show_cpumaskaffinity(struct device *dev,
 133                                         struct device_attribute *attr,
 134                                         char *buf)
 135 {
 136         return pci_bus_show_cpuaffinity(dev, 0, attr, buf);
 137 }
 138
 139 static inline ssize_t pci_bus_show_cpulistaffinity(struct device *dev,
 140                                         struct device_attribute *attr,
 141                                         char *buf)
 142 {
 143         return pci_bus_show_cpuaffinity(dev, 1, attr, buf);
 144 }
 145
 146 /* show resources */
 147 static ssize_t
 148 resource_show(struct device * dev, struct device_attribute *attr, char * buf)
 149 {
 150         struct pci_dev * pci_dev = to_pci_dev(dev);
 151         char * str = buf;
 152         int i;
 153         int max;
 154         resource_size_t start, end;
 155
 156         if (pci_dev->subordinate)
 157                 max = DEVICE_COUNT_RESOURCE;
 158         else
 159                 max = PCI_BRIDGE_RESOURCES;
 160
 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);
 168         }
 169         return (str - buf);
 170 }
 171
 172 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
 173 {
 174         struct pci_dev *pci_dev = to_pci_dev(dev);
 175
 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));
 181 }
 182
 183 static ssize_t is_enabled_store(struct device *dev,
 184                                 struct device_attribute *attr, const char *buf,
 185                                 size_t count)
 186 {
 187         struct pci_dev *pdev = to_pci_dev(dev);
 188         unsigned long val;
 189         ssize_t result = strict_strtoul(buf, 0, &val);
 190
 191         if (result < 0)
 192                 return result;
 193
 194         /* this can crash the machine when done on the "wrong" device */
 195         if (!capable(CAP_SYS_ADMIN))
 196                 return -EPERM;
 197
 198         if (!val) {
 199                 if (pci_is_enabled(pdev))
 200                         pci_disable_device(pdev);
 201                 else
 202                         result = -EIO;
 203         } else
 204                 result = pci_enable_device(pdev);
 205
 206         return result < 0 ? result : count;
 207 }
 208
 209 static ssize_t is_enabled_show(struct device *dev,
 210                                struct device_attribute *attr, char *buf)
 211 {
 212         struct pci_dev *pdev;
 213
 214         pdev = to_pci_dev (dev);
 215         return sprintf (buf, "%u\n", atomic_read(&pdev->enable_cnt));
 216 }
 217
 218 #ifdef CONFIG_NUMA
 219 static ssize_t
 220 numa_node_show(struct device *dev, struct device_attribute *attr, char *buf)
 221 {
 222         return sprintf (buf, "%d\n", dev->numa_node);
 223 }
 224 #endif
 225
 226 static ssize_t
 227 dma_mask_bits_show(struct device *dev, struct device_attribute *attr, char *buf)
 228 {
 229         struct pci_dev *pdev = to_pci_dev(dev);
 230
 231         return sprintf (buf, "%d\n", fls64(pdev->dma_mask));
 232 }
 233
 234 static ssize_t
 235 consistent_dma_mask_bits_show(struct device *dev, struct device_attribute *attr,
 236                                  char *buf)
 237 {
 238         return sprintf (buf, "%d\n", fls64(dev->coherent_dma_mask));
 239 }
 240
 241 static ssize_t
 242 msi_bus_show(struct device *dev, struct device_attribute *attr, char *buf)
 243 {
 244         struct pci_dev *pdev = to_pci_dev(dev);
 245
 246         if (!pdev->subordinate)
 247                 return 0;
 248
 249         return sprintf (buf, "%u\n",
 250                         !(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI));
 251 }
 252
 253 static ssize_t
 254 msi_bus_store(struct device *dev, struct device_attribute *attr,
 255               const char *buf, size_t count)
 256 {
 257         struct pci_dev *pdev = to_pci_dev(dev);
 258         unsigned long val;
 259
 260         if (strict_strtoul(buf, 0, &val) < 0)
 261                 return -EINVAL;
 262
 263         /* bad things may happen if the no_msi flag is changed
 264          * while some drivers are loaded */
 265         if (!capable(CAP_SYS_ADMIN))
 266                 return -EPERM;
 267
 268         /* Maybe pci devices without subordinate busses shouldn't even have this
 269          * attribute in the first place?  */
 270         if (!pdev->subordinate)
 271                 return count;
 272
 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) ^
 275             !!val) {
 276                 pdev->subordinate->bus_flags ^= PCI_BUS_FLAGS_NO_MSI;
 277
 278                 dev_warn(&pdev->dev, "forced subordinate bus to%s support MSI,"
 279                          " bad things could happen\n", val ? "" : " not");
 280         }
 281
 282         return count;
 283 }
 284
 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,
 288                                 size_t count)
 289 {
 290         unsigned long val;
 291         struct pci_bus *b = NULL;
 292
 293         if (strict_strtoul(buf, 0, &val) < 0)
 294                 return -EINVAL;
 295
 296         if (val) {
 297                 mutex_lock(&pci_remove_rescan_mutex);
 298                 while ((b = pci_find_next_bus(b)) != NULL)
 299                         pci_rescan_bus(b);
 300                 mutex_unlock(&pci_remove_rescan_mutex);
 301         }
 302         return count;
 303 }
 304
 305 struct bus_attribute pci_bus_attrs[] = {
 306         __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store),
 307         __ATTR_NULL
 308 };
 309
 310 static ssize_t
 311 dev_rescan_store(struct device *dev, struct device_attribute *attr,
 312                  const char *buf, size_t count)
 313 {
 314         unsigned long val;
 315         struct pci_dev *pdev = to_pci_dev(dev);
 316
 317         if (strict_strtoul(buf, 0, &val) < 0)
 318                 return -EINVAL;
 319
 320         if (val) {
 321                 mutex_lock(&pci_remove_rescan_mutex);
 322                 pci_rescan_bus(pdev->bus);
 323                 mutex_unlock(&pci_remove_rescan_mutex);
 324         }
 325         return count;
 326 }
 327
 328 static void remove_callback(struct device *dev)
 329 {
 330         struct pci_dev *pdev = to_pci_dev(dev);
 331
 332         mutex_lock(&pci_remove_rescan_mutex);
 333         pci_remove_bus_device(pdev);
 334         mutex_unlock(&pci_remove_rescan_mutex);
 335 }
 336
 337 static ssize_t
 338 remove_store(struct device *dev, struct device_attribute *dummy,
 339              const char *buf, size_t count)
 340 {
 341         int ret = 0;
 342         unsigned long val;
 343
 344         if (strict_strtoul(buf, 0, &val) < 0)
 345                 return -EINVAL;
 346
 347         /* An attribute cannot be unregistered by one of its own methods,
 348          * so we have to use this roundabout approach.
 349          */
 350         if (val)
 351                 ret = device_schedule_callback(dev, remove_callback);
 352         if (ret)
 353                 count = ret;
 354         return count;
 355 }
 356
 357 static ssize_t
 358 dev_bus_rescan_store(struct device *dev, struct device_attribute *attr,
 359                  const char *buf, size_t count)
 360 {
 361         unsigned long val;
 362         struct pci_bus *bus = to_pci_bus(dev);
 363
 364         if (strict_strtoul(buf, 0, &val) < 0)
 365                 return -EINVAL;
 366
 367         if (val) {
 368                 mutex_lock(&pci_remove_rescan_mutex);
 369                 pci_rescan_bus(bus);
 370                 mutex_unlock(&pci_remove_rescan_mutex);
 371         }
 372         return count;
 373 }
 374
 375 #endif
 376
 377 struct device_attribute pci_dev_attrs[] = {
 378         __ATTR_RO(resource),
 379         __ATTR_RO(vendor),
 380         __ATTR_RO(device),
 381         __ATTR_RO(subsystem_vendor),
 382         __ATTR_RO(subsystem_device),
 383         __ATTR_RO(class),
 384         __ATTR_RO(irq),
 385         __ATTR_RO(local_cpus),
 386         __ATTR_RO(local_cpulist),
 387         __ATTR_RO(modalias),
 388 #ifdef CONFIG_NUMA
 389         __ATTR_RO(numa_node),
 390 #endif
 391         __ATTR_RO(dma_mask_bits),
 392         __ATTR_RO(consistent_dma_mask_bits),
 393         __ATTR(enable, 0600, is_enabled_show, is_enabled_store),
 394         __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR),
 395                 broken_parity_status_show,broken_parity_status_store),
 396         __ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store),
 397 #ifdef CONFIG_HOTPLUG
 398         __ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store),
 399         __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store),
 400 #endif
 401         __ATTR_NULL,
 402 };
 403
 404 struct device_attribute pcibus_dev_attrs[] = {
 405 #ifdef CONFIG_HOTPLUG
 406         __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store),
 407 #endif
 408         __ATTR(cpuaffinity, S_IRUGO, pci_bus_show_cpumaskaffinity, NULL),
 409         __ATTR(cpulistaffinity, S_IRUGO, pci_bus_show_cpulistaffinity, NULL),
 410         __ATTR_NULL,
 411 };
 412
 413 static ssize_t
 414 boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf)
 415 {
 416         struct pci_dev *pdev = to_pci_dev(dev);
 417
 418         return sprintf(buf, "%u\n",
 419                 !!(pdev->resource[PCI_ROM_RESOURCE].flags &
 420                    IORESOURCE_ROM_SHADOW));
 421 }
 422 struct device_attribute vga_attr = __ATTR_RO(boot_vga);
 423
 424 static ssize_t
 425 pci_read_config(struct file *filp, struct kobject *kobj,
 426                 struct bin_attribute *bin_attr,
 427                 char *buf, loff_t off, size_t count)
 428 {
 429         struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
 430         unsigned int size = 64;
 431         loff_t init_off = off;
 432         u8 *data = (u8*) buf;
 433
 434         /* Several chips lock up trying to read undefined config space */
 435         if (security_capable(&init_user_ns, filp->f_cred, CAP_SYS_ADMIN) == 0) {
 436                 size = dev->cfg_size;
 437         } else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
 438                 size = 128;
 439         }
 440
 441         if (off > size)
 442                 return 0;
 443         if (off + count > size) {
 444                 size -= off;
 445                 count = size;
 446         } else {
 447                 size = count;
 448         }
 449
 450         if ((off & 1) && size) {
 451                 u8 val;
 452                 pci_user_read_config_byte(dev, off, &val);
 453                 data[off - init_off] = val;
 454                 off++;
 455                 size--;
 456         }
 457
 458         if ((off & 3) && size > 2) {
 459                 u16 val;
 460                 pci_user_read_config_word(dev, off, &val);
 461                 data[off - init_off] = val & 0xff;
 462                 data[off - init_off + 1] = (val >> 8) & 0xff;
 463                 off += 2;
 464                 size -= 2;
 465         }
 466
 467         while (size > 3) {
 468                 u32 val;
 469                 pci_user_read_config_dword(dev, off, &val);
 470                 data[off - init_off] = val & 0xff;
 471                 data[off - init_off + 1] = (val >> 8) & 0xff;
 472                 data[off - init_off + 2] = (val >> 16) & 0xff;
 473                 data[off - init_off + 3] = (val >> 24) & 0xff;
 474                 off += 4;
 475                 size -= 4;
 476         }
 477
 478         if (size >= 2) {
 479                 u16 val;
 480                 pci_user_read_config_word(dev, off, &val);
 481                 data[off - init_off] = val & 0xff;
 482                 data[off - init_off + 1] = (val >> 8) & 0xff;
 483                 off += 2;
 484                 size -= 2;
 485         }
 486
 487         if (size > 0) {
 488                 u8 val;
 489                 pci_user_read_config_byte(dev, off, &val);
 490                 data[off - init_off] = val;
 491                 off++;
 492                 --size;
 493         }
 494
 495         return count;
 496 }
 497
 498 static ssize_t
 499 pci_write_config(struct file* filp, struct kobject *kobj,
 500                  struct bin_attribute *bin_attr,
 501                  char *buf, loff_t off, size_t count)
 502 {
 503         struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
 504         unsigned int size = count;
 505         loff_t init_off = off;
 506         u8 *data = (u8*) buf;
 507
 508         if (off > dev->cfg_size)
 509                 return 0;
 510         if (off + count > dev->cfg_size) {
 511                 size = dev->cfg_size - off;
 512                 count = size;
 513         }
 514
 515         if ((off & 1) && size) {
 516                 pci_user_write_config_byte(dev, off, data[off - init_off]);
 517                 off++;
 518                 size--;
 519         }
 520
 521         if ((off & 3) && size > 2) {
 522                 u16 val = data[off - init_off];
 523                 val |= (u16) data[off - init_off + 1] << 8;
 524                 pci_user_write_config_word(dev, off, val);
 525                 off += 2;
 526                 size -= 2;
 527         }
 528
 529         while (size > 3) {
 530                 u32 val = data[off - init_off];
 531                 val |= (u32) data[off - init_off + 1] << 8;
 532                 val |= (u32) data[off - init_off + 2] << 16;
 533                 val |= (u32) data[off - init_off + 3] << 24;
 534                 pci_user_write_config_dword(dev, off, val);
 535                 off += 4;
 536                 size -= 4;
 537         }
 538
 539         if (size >= 2) {
 540                 u16 val = data[off - init_off];
 541                 val |= (u16) data[off - init_off + 1] << 8;
 542                 pci_user_write_config_word(dev, off, val);
 543                 off += 2;
 544                 size -= 2;
 545         }
 546
 547         if (size) {
 548                 pci_user_write_config_byte(dev, off, data[off - init_off]);
 549                 off++;
 550                 --size;
 551         }
 552
 553         return count;
 554 }
 555
 556 static ssize_t
 557 read_vpd_attr(struct file *filp, struct kobject *kobj,
 558               struct bin_attribute *bin_attr,
 559               char *buf, loff_t off, size_t count)
 560 {
 561         struct pci_dev *dev =
 562                 to_pci_dev(container_of(kobj, struct device, kobj));
 563
 564         if (off > bin_attr->size)
 565                 count = 0;
 566         else if (count > bin_attr->size - off)
 567                 count = bin_attr->size - off;
 568
 569         return pci_read_vpd(dev, off, count, buf);
 570 }
 571
 572 static ssize_t
 573 write_vpd_attr(struct file *filp, struct kobject *kobj,
 574                struct bin_attribute *bin_attr,
 575                char *buf, loff_t off, size_t count)
 576 {
 577         struct pci_dev *dev =
 578                 to_pci_dev(container_of(kobj, struct device, kobj));
 579
 580         if (off > bin_attr->size)
 581                 count = 0;
 582         else if (count > bin_attr->size - off)
 583                 count = bin_attr->size - off;
 584
 585         return pci_write_vpd(dev, off, count, buf);
 586 }
 587
 588 #ifdef HAVE_PCI_LEGACY
 589 /**
 590  * pci_read_legacy_io - read byte(s) from legacy I/O port space
 591  * @filp: open sysfs file
 592  * @kobj: kobject corresponding to file to read from
 593  * @bin_attr: struct bin_attribute for this file
 594  * @buf: buffer to store results
 595  * @off: offset into legacy I/O port space
 596  * @count: number of bytes to read
 597  *
 598  * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific
 599  * callback routine (pci_legacy_read).
 600  */
 601 static ssize_t
 602 pci_read_legacy_io(struct file *filp, struct kobject *kobj,
 603                    struct bin_attribute *bin_attr,
 604                    char *buf, loff_t off, size_t count)
 605 {
 606         struct pci_bus *bus = to_pci_bus(container_of(kobj,
 607                                                       struct device,
 608                                                       kobj));
 609
 610         /* Only support 1, 2 or 4 byte accesses */
 611         if (count != 1 && count != 2 && count != 4)
 612                 return -EINVAL;
 613
 614         return pci_legacy_read(bus, off, (u32 *)buf, count);
 615 }
 616
 617 /**
 618  * pci_write_legacy_io - write byte(s) to legacy I/O port space
 619  * @filp: open sysfs file
 620  * @kobj: kobject corresponding to file to read from
 621  * @bin_attr: struct bin_attribute for this file
 622  * @buf: buffer containing value to be written
 623  * @off: offset into legacy I/O port space
 624  * @count: number of bytes to write
 625  *
 626  * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific
 627  * callback routine (pci_legacy_write).
 628  */
 629 static ssize_t
 630 pci_write_legacy_io(struct file *filp, struct kobject *kobj,
 631                     struct bin_attribute *bin_attr,
 632                     char *buf, loff_t off, size_t count)
 633 {
 634         struct pci_bus *bus = to_pci_bus(container_of(kobj,
 635                                                       struct device,
 636                                                       kobj));
 637         /* Only support 1, 2 or 4 byte accesses */
 638         if (count != 1 && count != 2 && count != 4)
 639                 return -EINVAL;
 640
 641         return pci_legacy_write(bus, off, *(u32 *)buf, count);
 642 }
 643
 644 /**
 645  * pci_mmap_legacy_mem - map legacy PCI memory into user memory space
 646  * @filp: open sysfs file
 647  * @kobj: kobject corresponding to device to be mapped
 648  * @attr: struct bin_attribute for this file
 649  * @vma: struct vm_area_struct passed to mmap
 650  *
 651  * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap
 652  * legacy memory space (first meg of bus space) into application virtual
 653  * memory space.
 654  */
 655 static int
 656 pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj,
 657                     struct bin_attribute *attr,
 658                     struct vm_area_struct *vma)
 659 {
 660         struct pci_bus *bus = to_pci_bus(container_of(kobj,
 661                                                       struct device,
 662                                                       kobj));
 663
 664         return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem);
 665 }
 666
 667 /**
 668  * pci_mmap_legacy_io - map legacy PCI IO into user memory space
 669  * @filp: open sysfs file
 670  * @kobj: kobject corresponding to device to be mapped
 671  * @attr: struct bin_attribute for this file
 672  * @vma: struct vm_area_struct passed to mmap
 673  *
 674  * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap
 675  * legacy IO space (first meg of bus space) into application virtual
 676  * memory space. Returns -ENOSYS if the operation isn't supported
 677  */
 678 static int
 679 pci_mmap_legacy_io(struct file *filp, struct kobject *kobj,
 680                    struct bin_attribute *attr,
 681                    struct vm_area_struct *vma)
 682 {
 683         struct pci_bus *bus = to_pci_bus(container_of(kobj,
 684                                                       struct device,
 685                                                       kobj));
 686
 687         return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io);
 688 }
 689
 690 /**
 691  * pci_adjust_legacy_attr - adjustment of legacy file attributes
 692  * @b: bus to create files under
 693  * @mmap_type: I/O port or memory
 694  *
 695  * Stub implementation. Can be overridden by arch if necessary.
 696  */
 697 void __weak
 698 pci_adjust_legacy_attr(struct pci_bus *b, enum pci_mmap_state mmap_type)
 699 {
 700         return;
 701 }
 702
 703 /**
 704  * pci_create_legacy_files - create legacy I/O port and memory files
 705  * @b: bus to create files under
 706  *
 707  * Some platforms allow access to legacy I/O port and ISA memory space on
 708  * a per-bus basis.  This routine creates the files and ties them into
 709  * their associated read, write and mmap files from pci-sysfs.c
 710  *
 711  * On error unwind, but don't propagate the error to the caller
 712  * as it is ok to set up the PCI bus without these files.
 713  */
 714 void pci_create_legacy_files(struct pci_bus *b)
 715 {
 716         int error;
 717
 718         b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2,
 719                                GFP_ATOMIC);
 720         if (!b->legacy_io)
 721                 goto kzalloc_err;
 722
 723         sysfs_bin_attr_init(b->legacy_io);
 724         b->legacy_io->attr.name = "legacy_io";
 725         b->legacy_io->size = 0xffff;
 726         b->legacy_io->attr.mode = S_IRUSR | S_IWUSR;
 727         b->legacy_io->read = pci_read_legacy_io;
 728         b->legacy_io->write = pci_write_legacy_io;
 729         b->legacy_io->mmap = pci_mmap_legacy_io;
 730         pci_adjust_legacy_attr(b, pci_mmap_io);
 731         error = device_create_bin_file(&b->dev, b->legacy_io);
 732         if (error)
 733                 goto legacy_io_err;
 734
 735         /* Allocated above after the legacy_io struct */
 736         b->legacy_mem = b->legacy_io + 1;
 737         sysfs_bin_attr_init(b->legacy_mem);
 738         b->legacy_mem->attr.name = "legacy_mem";
 739         b->legacy_mem->size = 1024*1024;
 740         b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR;
 741         b->legacy_mem->mmap = pci_mmap_legacy_mem;
 742         pci_adjust_legacy_attr(b, pci_mmap_mem);
 743         error = device_create_bin_file(&b->dev, b->legacy_mem);
 744         if (error)
 745                 goto legacy_mem_err;
 746
 747         return;
 748
 749 legacy_mem_err:
 750         device_remove_bin_file(&b->dev, b->legacy_io);
 751 legacy_io_err:
 752         kfree(b->legacy_io);
 753         b->legacy_io = NULL;
 754 kzalloc_err:
 755         printk(KERN_WARNING "pci: warning: could not create legacy I/O port "
 756                "and ISA memory resources to sysfs\n");
 757         return;
 758 }
 759
 760 void pci_remove_legacy_files(struct pci_bus *b)
 761 {
 762         if (b->legacy_io) {
 763                 device_remove_bin_file(&b->dev, b->legacy_io);
 764                 device_remove_bin_file(&b->dev, b->legacy_mem);
 765                 kfree(b->legacy_io); /* both are allocated here */
 766         }
 767 }
 768 #endif /* HAVE_PCI_LEGACY */
 769
 770 #ifdef HAVE_PCI_MMAP
 771
 772 int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma,
 773                   enum pci_mmap_api mmap_api)
 774 {
 775         unsigned long nr, start, size, pci_start;
 776
 777         if (pci_resource_len(pdev, resno) == 0)
 778                 return 0;
 779         nr = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
 780         start = vma->vm_pgoff;
 781         size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1;
 782         pci_start = (mmap_api == PCI_MMAP_PROCFS) ?
 783                         pci_resource_start(pdev, resno) >> PAGE_SHIFT : 0;
 784         if (start >= pci_start && start < pci_start + size &&
 785                         start + nr <= pci_start + size)
 786                 return 1;
 787         return 0;
 788 }
 789
 790 /**
 791  * pci_mmap_resource - map a PCI resource into user memory space
 792  * @kobj: kobject for mapping
 793  * @attr: struct bin_attribute for the file being mapped
 794  * @vma: struct vm_area_struct passed into the mmap
 795  * @write_combine: 1 for write_combine mapping
 796  *
 797  * Use the regular PCI mapping routines to map a PCI resource into userspace.
 798  */
 799 static int
 800 pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
 801                   struct vm_area_struct *vma, int write_combine)
 802 {
 803         struct pci_dev *pdev = to_pci_dev(container_of(kobj,
 804                                                        struct device, kobj));
 805         struct resource *res = attr->private;
 806         enum pci_mmap_state mmap_type;
 807         resource_size_t start, end;
 808         int i;
 809
 810         for (i = 0; i < PCI_ROM_RESOURCE; i++)
 811                 if (res == &pdev->resource[i])
 812                         break;
 813         if (i >= PCI_ROM_RESOURCE)
 814                 return -ENODEV;
 815
 816         if (!pci_mmap_fits(pdev, i, vma, PCI_MMAP_SYSFS)) {
 817                 WARN(1, "process \"%s\" tried to map 0x%08lx bytes "
 818                         "at page 0x%08lx on %s BAR %d (start 0x%16Lx, size 0x%16Lx)\n",
 819                         current->comm, vma->vm_end-vma->vm_start, vma->vm_pgoff,
 820                         pci_name(pdev), i,
 821                         (u64)pci_resource_start(pdev, i),
 822                         (u64)pci_resource_len(pdev, i));
 823                 return -EINVAL;
 824         }
 825
 826         /* pci_mmap_page_range() expects the same kind of entry as coming
 827          * from /proc/bus/pci/ which is a "user visible" value. If this is
 828          * different from the resource itself, arch will do necessary fixup.
 829          */
 830         pci_resource_to_user(pdev, i, res, &start, &end);
 831         vma->vm_pgoff += start >> PAGE_SHIFT;
 832         mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;
 833
 834         if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(start))
 835                 return -EINVAL;
 836
 837         return pci_mmap_page_range(pdev, vma, mmap_type, write_combine);
 838 }
 839
 840 static int
 841 pci_mmap_resource_uc(struct file *filp, struct kobject *kobj,
 842                      struct bin_attribute *attr,
 843                      struct vm_area_struct *vma)
 844 {
 845         return pci_mmap_resource(kobj, attr, vma, 0);
 846 }
 847
 848 static int
 849 pci_mmap_resource_wc(struct file *filp, struct kobject *kobj,
 850                      struct bin_attribute *attr,
 851                      struct vm_area_struct *vma)
 852 {
 853         return pci_mmap_resource(kobj, attr, vma, 1);
 854 }
 855
 856 static ssize_t
 857 pci_resource_io(struct file *filp, struct kobject *kobj,
 858                 struct bin_attribute *attr, char *buf,
 859                 loff_t off, size_t count, bool write)
 860 {
 861         struct pci_dev *pdev = to_pci_dev(container_of(kobj,
 862                                                        struct device, kobj));
 863         struct resource *res = attr->private;
 864         unsigned long port = off;
 865         int i;
 866
 867         for (i = 0; i < PCI_ROM_RESOURCE; i++)
 868                 if (res == &pdev->resource[i])
 869                         break;
 870         if (i >= PCI_ROM_RESOURCE)
 871                 return -ENODEV;
 872
 873         port += pci_resource_start(pdev, i);
 874
 875         if (port > pci_resource_end(pdev, i))
 876                 return 0;
 877
 878         if (port + count - 1 > pci_resource_end(pdev, i))
 879                 return -EINVAL;
 880
 881         switch (count) {
 882         case 1:
 883                 if (write)
 884                         outb(*(u8 *)buf, port);
 885                 else
 886                         *(u8 *)buf = inb(port);
 887                 return 1;
 888         case 2:
 889                 if (write)
 890                         outw(*(u16 *)buf, port);
 891                 else
 892                         *(u16 *)buf = inw(port);
 893                 return 2;
 894         case 4:
 895                 if (write)
 896                         outl(*(u32 *)buf, port);
 897                 else
 898                         *(u32 *)buf = inl(port);
 899                 return 4;
 900         }
 901         return -EINVAL;
 902 }
 903
 904 static ssize_t
 905 pci_read_resource_io(struct file *filp, struct kobject *kobj,
 906                      struct bin_attribute *attr, char *buf,
 907                      loff_t off, size_t count)
 908 {
 909         return pci_resource_io(filp, kobj, attr, buf, off, count, false);
 910 }
 911
 912 static ssize_t
 913 pci_write_resource_io(struct file *filp, struct kobject *kobj,
 914                       struct bin_attribute *attr, char *buf,
 915                       loff_t off, size_t count)
 916 {
 917         return pci_resource_io(filp, kobj, attr, buf, off, count, true);
 918 }
 919
 920 /**
 921  * pci_remove_resource_files - cleanup resource files
 922  * @pdev: dev to cleanup
 923  *
 924  * If we created resource files for @pdev, remove them from sysfs and
 925  * free their resources.
 926  */
 927 static void
 928 pci_remove_resource_files(struct pci_dev *pdev)
 929 {
 930         int i;
 931
 932         for (i = 0; i < PCI_ROM_RESOURCE; i++) {
 933                 struct bin_attribute *res_attr;
 934
 935                 res_attr = pdev->res_attr[i];
 936                 if (res_attr) {
 937                         sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
 938                         kfree(res_attr);
 939                 }
 940
 941                 res_attr = pdev->res_attr_wc[i];
 942                 if (res_attr) {
 943                         sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
 944                         kfree(res_attr);
 945                 }
 946         }
 947 }
 948
 949 static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine)
 950 {
 951         /* allocate attribute structure, piggyback attribute name */
 952         int name_len = write_combine ? 13 : 10;
 953         struct bin_attribute *res_attr;
 954         int retval;
 955
 956         res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC);
 957         if (res_attr) {
 958                 char *res_attr_name = (char *)(res_attr + 1);
 959
 960                 sysfs_bin_attr_init(res_attr);
 961                 if (write_combine) {
 962                         pdev->res_attr_wc[num] = res_attr;
 963                         sprintf(res_attr_name, "resource%d_wc", num);
 964                         res_attr->mmap = pci_mmap_resource_wc;
 965                 } else {
 966                         pdev->res_attr[num] = res_attr;
 967                         sprintf(res_attr_name, "resource%d", num);
 968                         res_attr->mmap = pci_mmap_resource_uc;
 969                 }
 970                 if (pci_resource_flags(pdev, num) & IORESOURCE_IO) {
 971                         res_attr->read = pci_read_resource_io;
 972                         res_attr->write = pci_write_resource_io;
 973                 }
 974                 res_attr->attr.name = res_attr_name;
 975                 res_attr->attr.mode = S_IRUSR | S_IWUSR;
 976                 res_attr->size = pci_resource_len(pdev, num);
 977                 res_attr->private = &pdev->resource[num];
 978                 retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr);
 979         } else
 980                 retval = -ENOMEM;
 981
 982         return retval;
 983 }
 984
 985 /**
 986  * pci_create_resource_files - create resource files in sysfs for @dev
 987  * @pdev: dev in question
 988  *
 989  * Walk the resources in @pdev creating files for each resource available.
 990  */
 991 static int pci_create_resource_files(struct pci_dev *pdev)
 992 {
 993         int i;
 994         int retval;
 995
 996         /* Expose the PCI resources from this device as files */
 997         for (i = 0; i < PCI_ROM_RESOURCE; i++) {
 998
 999                 /* skip empty resources */
1000                 if (!pci_resource_len(pdev, i))
1001                         continue;
1002
1003                 retval = pci_create_attr(pdev, i, 0);
1004                 /* for prefetchable resources, create a WC mappable file */
1005                 if (!retval && pdev->resource[i].flags & IORESOURCE_PREFETCH)
1006                         retval = pci_create_attr(pdev, i, 1);
1007
1008                 if (retval) {
1009                         pci_remove_resource_files(pdev);
1010                         return retval;
1011                 }
1012         }
1013         return 0;
1014 }
1015 #else /* !HAVE_PCI_MMAP */
1016 int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; }
1017 void __weak pci_remove_resource_files(struct pci_dev *dev) { return; }
1018 #endif /* HAVE_PCI_MMAP */
1019
1020 /**
1021  * pci_write_rom - used to enable access to the PCI ROM display
1022  * @filp: sysfs file
1023  * @kobj: kernel object handle
1024  * @bin_attr: struct bin_attribute for this file
1025  * @buf: user input
1026  * @off: file offset
1027  * @count: number of byte in input
1028  *
1029  * writing anything except 0 enables it
1030  */
1031 static ssize_t
1032 pci_write_rom(struct file *filp, struct kobject *kobj,
1033               struct bin_attribute *bin_attr,
1034               char *buf, loff_t off, size_t count)
1035 {
1036         struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
1037
1038         if ((off ==  0) && (*buf == '0') && (count == 2))
1039                 pdev->rom_attr_enabled = 0;
1040         else
1041                 pdev->rom_attr_enabled = 1;
1042
1043         return count;
1044 }
1045
1046 /**
1047  * pci_read_rom - read a PCI ROM
1048  * @filp: sysfs file
1049  * @kobj: kernel object handle
1050  * @bin_attr: struct bin_attribute for this file
1051  * @buf: where to put the data we read from the ROM
1052  * @off: file offset
1053  * @count: number of bytes to read
1054  *
1055  * Put @count bytes starting at @off into @buf from the ROM in the PCI
1056  * device corresponding to @kobj.
1057  */
1058 static ssize_t
1059 pci_read_rom(struct file *filp, struct kobject *kobj,
1060              struct bin_attribute *bin_attr,
1061              char *buf, loff_t off, size_t count)
1062 {
1063         struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
1064         void __iomem *rom;
1065         size_t size;
1066
1067         if (!pdev->rom_attr_enabled)
1068                 return -EINVAL;
1069
1070         rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */
1071         if (!rom || !size)
1072                 return -EIO;
1073
1074         if (off >= size)
1075                 count = 0;
1076         else {
1077                 if (off + count > size)
1078                         count = size - off;
1079
1080                 memcpy_fromio(buf, rom + off, count);
1081         }
1082         pci_unmap_rom(pdev, rom);
1083
1084         return count;
1085 }
1086
1087 static struct bin_attribute pci_config_attr = {
1088         .attr = {
1089                 .name = "config",
1090                 .mode = S_IRUGO | S_IWUSR,
1091         },
1092         .size = PCI_CFG_SPACE_SIZE,
1093         .read = pci_read_config,
1094         .write = pci_write_config,
1095 };
1096
1097 static struct bin_attribute pcie_config_attr = {
1098         .attr = {
1099                 .name = "config",
1100                 .mode = S_IRUGO | S_IWUSR,
1101         },
1102         .size = PCI_CFG_SPACE_EXP_SIZE,
1103         .read = pci_read_config,
1104         .write = pci_write_config,
1105 };
1106
1107 int __attribute__ ((weak)) pcibios_add_platform_entries(struct pci_dev *dev)
1108 {
1109         return 0;
1110 }
1111
1112 static ssize_t reset_store(struct device *dev,
1113                            struct device_attribute *attr, const char *buf,
1114                            size_t count)
1115 {
1116         struct pci_dev *pdev = to_pci_dev(dev);
1117         unsigned long val;
1118         ssize_t result = strict_strtoul(buf, 0, &val);
1119
1120         if (result < 0)
1121                 return result;
1122
1123         if (val != 1)
1124                 return -EINVAL;
1125
1126         result = pci_reset_function(pdev);
1127         if (result < 0)
1128                 return result;
1129
1130         return count;
1131 }
1132
1133 static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store);
1134
1135 static int pci_create_capabilities_sysfs(struct pci_dev *dev)
1136 {
1137         int retval;
1138         struct bin_attribute *attr;
1139
1140         /* If the device has VPD, try to expose it in sysfs. */
1141         if (dev->vpd) {
1142                 attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
1143                 if (!attr)
1144                         return -ENOMEM;
1145
1146                 sysfs_bin_attr_init(attr);
1147                 attr->size = dev->vpd->len;
1148                 attr->attr.name = "vpd";
1149                 attr->attr.mode = S_IRUSR | S_IWUSR;
1150                 attr->read = read_vpd_attr;
1151                 attr->write = write_vpd_attr;
1152                 retval = sysfs_create_bin_file(&dev->dev.kobj, attr);
1153                 if (retval) {
1154                         kfree(attr);
1155                         return retval;
1156                 }
1157                 dev->vpd->attr = attr;
1158         }
1159
1160         /* Active State Power Management */
1161         pcie_aspm_create_sysfs_dev_files(dev);
1162
1163         if (!pci_probe_reset_function(dev)) {
1164                 retval = device_create_file(&dev->dev, &reset_attr);
1165                 if (retval)
1166                         goto error;
1167                 dev->reset_fn = 1;
1168         }
1169         return 0;
1170
1171 error:
1172         pcie_aspm_remove_sysfs_dev_files(dev);
1173         if (dev->vpd && dev->vpd->attr) {
1174                 sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
1175                 kfree(dev->vpd->attr);
1176         }
1177
1178         return retval;
1179 }
1180
1181 int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
1182 {
1183         int retval;
1184         int rom_size = 0;
1185         struct bin_attribute *attr;
1186
1187         if (!sysfs_initialized)
1188                 return -EACCES;
1189
1190         if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
1191                 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr);
1192         else
1193                 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr);
1194         if (retval)
1195                 goto err;
1196
1197         retval = pci_create_resource_files(pdev);
1198         if (retval)
1199                 goto err_config_file;
1200
1201         if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
1202                 rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
1203         else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)
1204                 rom_size = 0x20000;
1205
1206         /* If the device has a ROM, try to expose it in sysfs. */
1207         if (rom_size) {
1208                 attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
1209                 if (!attr) {
1210                         retval = -ENOMEM;
1211                         goto err_resource_files;
1212                 }
1213                 sysfs_bin_attr_init(attr);
1214                 attr->size = rom_size;
1215                 attr->attr.name = "rom";
1216                 attr->attr.mode = S_IRUSR | S_IWUSR;
1217                 attr->read = pci_read_rom;
1218                 attr->write = pci_write_rom;
1219                 retval = sysfs_create_bin_file(&pdev->dev.kobj, attr);
1220                 if (retval) {
1221                         kfree(attr);
1222                         goto err_resource_files;
1223                 }
1224                 pdev->rom_attr = attr;
1225         }
1226
1227         if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) {
1228                 retval = device_create_file(&pdev->dev, &vga_attr);
1229                 if (retval)
1230                         goto err_rom_file;
1231         }
1232
1233         /* add platform-specific attributes */
1234         retval = pcibios_add_platform_entries(pdev);
1235         if (retval)
1236                 goto err_vga_file;
1237
1238         /* add sysfs entries for various capabilities */
1239         retval = pci_create_capabilities_sysfs(pdev);
1240         if (retval)
1241                 goto err_vga_file;
1242
1243         pci_create_firmware_label_files(pdev);
1244
1245         return 0;
1246
1247 err_vga_file:
1248         if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA)
1249                 device_remove_file(&pdev->dev, &vga_attr);
1250 err_rom_file:
1251         if (rom_size) {
1252                 sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
1253                 kfree(pdev->rom_attr);
1254                 pdev->rom_attr = NULL;
1255         }
1256 err_resource_files:
1257         pci_remove_resource_files(pdev);
1258 err_config_file:
1259         if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
1260                 sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
1261         else
1262                 sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
1263 err:
1264         return retval;
1265 }
1266
1267 static void pci_remove_capabilities_sysfs(struct pci_dev *dev)
1268 {
1269         if (dev->vpd && dev->vpd->attr) {
1270                 sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
1271                 kfree(dev->vpd->attr);
1272         }
1273
1274         pcie_aspm_remove_sysfs_dev_files(dev);
1275         if (dev->reset_fn) {
1276                 device_remove_file(&dev->dev, &reset_attr);
1277                 dev->reset_fn = 0;
1278         }
1279 }
1280
1281 /**
1282  * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files
1283  * @pdev: device whose entries we should free
1284  *
1285  * Cleanup when @pdev is removed from sysfs.
1286  */
1287 void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
1288 {
1289         int rom_size = 0;
1290
1291         if (!sysfs_initialized)
1292                 return;
1293
1294         pci_remove_capabilities_sysfs(pdev);
1295
1296         if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
1297                 sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
1298         else
1299                 sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
1300
1301         pci_remove_resource_files(pdev);
1302
1303         if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
1304                 rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
1305         else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)
1306                 rom_size = 0x20000;
1307
1308         if (rom_size && pdev->rom_attr) {
1309                 sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
1310                 kfree(pdev->rom_attr);
1311         }
1312
1313         pci_remove_firmware_label_files(pdev);
1314
1315 }
1316
1317 static int __init pci_sysfs_init(void)
1318 {
1319         struct pci_dev *pdev = NULL;
1320         int retval;
1321
1322         sysfs_initialized = 1;
1323         for_each_pci_dev(pdev) {
1324                 retval = pci_create_sysfs_dev_files(pdev);
1325                 if (retval) {
1326                         pci_dev_put(pdev);
1327                         return retval;
1328                 }
1329         }
1330
1331         return 0;
1332 }
1333
1334 late_initcall(pci_sysfs_init);