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_stop_and_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                 if (!pci_is_root_bus(bus) && list_empty(&bus->devices))
 370                         pci_rescan_bus_bridge_resize(bus->self);
 371                 else
 372                         pci_rescan_bus(bus);
 373                 mutex_unlock(&pci_remove_rescan_mutex);
 374         }
 375         return count;
 376 }
 377
 378 #endif
 379
 380 struct device_attribute pci_dev_attrs[] = {
 381         __ATTR_RO(resource),
 382         __ATTR_RO(vendor),
 383         __ATTR_RO(device),
 384         __ATTR_RO(subsystem_vendor),
 385         __ATTR_RO(subsystem_device),
 386         __ATTR_RO(class),
 387         __ATTR_RO(irq),
 388         __ATTR_RO(local_cpus),
 389         __ATTR_RO(local_cpulist),
 390         __ATTR_RO(modalias),
 391 #ifdef CONFIG_NUMA
 392         __ATTR_RO(numa_node),
 393 #endif
 394         __ATTR_RO(dma_mask_bits),
 395         __ATTR_RO(consistent_dma_mask_bits),
 396         __ATTR(enable, 0600, is_enabled_show, is_enabled_store),
 397         __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR),
 398                 broken_parity_status_show,broken_parity_status_store),
 399         __ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store),
 400 #ifdef CONFIG_HOTPLUG
 401         __ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store),
 402         __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store),
 403 #endif
 404         __ATTR_NULL,
 405 };
 406
 407 struct device_attribute pcibus_dev_attrs[] = {
 408 #ifdef CONFIG_HOTPLUG
 409         __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store),
 410 #endif
 411         __ATTR(cpuaffinity, S_IRUGO, pci_bus_show_cpumaskaffinity, NULL),
 412         __ATTR(cpulistaffinity, S_IRUGO, pci_bus_show_cpulistaffinity, NULL),
 413         __ATTR_NULL,
 414 };
 415
 416 static ssize_t
 417 boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf)
 418 {
 419         struct pci_dev *pdev = to_pci_dev(dev);
 420
 421         return sprintf(buf, "%u\n",
 422                 !!(pdev->resource[PCI_ROM_RESOURCE].flags &
 423                    IORESOURCE_ROM_SHADOW));
 424 }
 425 struct device_attribute vga_attr = __ATTR_RO(boot_vga);
 426
 427 static ssize_t
 428 pci_read_config(struct file *filp, struct kobject *kobj,
 429                 struct bin_attribute *bin_attr,
 430                 char *buf, loff_t off, size_t count)
 431 {
 432         struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
 433         unsigned int size = 64;
 434         loff_t init_off = off;
 435         u8 *data = (u8*) buf;
 436
 437         /* Several chips lock up trying to read undefined config space */
 438         if (security_capable(filp->f_cred, &init_user_ns, CAP_SYS_ADMIN) == 0) {
 439                 size = dev->cfg_size;
 440         } else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
 441                 size = 128;
 442         }
 443
 444         if (off > size)
 445                 return 0;
 446         if (off + count > size) {
 447                 size -= off;
 448                 count = size;
 449         } else {
 450                 size = count;
 451         }
 452
 453         if ((off & 1) && size) {
 454                 u8 val;
 455                 pci_user_read_config_byte(dev, off, &val);
 456                 data[off - init_off] = val;
 457                 off++;
 458                 size--;
 459         }
 460
 461         if ((off & 3) && size > 2) {
 462                 u16 val;
 463                 pci_user_read_config_word(dev, off, &val);
 464                 data[off - init_off] = val & 0xff;
 465                 data[off - init_off + 1] = (val >> 8) & 0xff;
 466                 off += 2;
 467                 size -= 2;
 468         }
 469
 470         while (size > 3) {
 471                 u32 val;
 472                 pci_user_read_config_dword(dev, off, &val);
 473                 data[off - init_off] = val & 0xff;
 474                 data[off - init_off + 1] = (val >> 8) & 0xff;
 475                 data[off - init_off + 2] = (val >> 16) & 0xff;
 476                 data[off - init_off + 3] = (val >> 24) & 0xff;
 477                 off += 4;
 478                 size -= 4;
 479         }
 480
 481         if (size >= 2) {
 482                 u16 val;
 483                 pci_user_read_config_word(dev, off, &val);
 484                 data[off - init_off] = val & 0xff;
 485                 data[off - init_off + 1] = (val >> 8) & 0xff;
 486                 off += 2;
 487                 size -= 2;
 488         }
 489
 490         if (size > 0) {
 491                 u8 val;
 492                 pci_user_read_config_byte(dev, off, &val);
 493                 data[off - init_off] = val;
 494                 off++;
 495                 --size;
 496         }
 497
 498         return count;
 499 }
 500
 501 static ssize_t
 502 pci_write_config(struct file* filp, struct kobject *kobj,
 503                  struct bin_attribute *bin_attr,
 504                  char *buf, loff_t off, size_t count)
 505 {
 506         struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
 507         unsigned int size = count;
 508         loff_t init_off = off;
 509         u8 *data = (u8*) buf;
 510
 511         if (off > dev->cfg_size)
 512                 return 0;
 513         if (off + count > dev->cfg_size) {
 514                 size = dev->cfg_size - off;
 515                 count = size;
 516         }
 517
 518         if ((off & 1) && size) {
 519                 pci_user_write_config_byte(dev, off, data[off - init_off]);
 520                 off++;
 521                 size--;
 522         }
 523
 524         if ((off & 3) && size > 2) {
 525                 u16 val = data[off - init_off];
 526                 val |= (u16) data[off - init_off + 1] << 8;
 527                 pci_user_write_config_word(dev, off, val);
 528                 off += 2;
 529                 size -= 2;
 530         }
 531
 532         while (size > 3) {
 533                 u32 val = data[off - init_off];
 534                 val |= (u32) data[off - init_off + 1] << 8;
 535                 val |= (u32) data[off - init_off + 2] << 16;
 536                 val |= (u32) data[off - init_off + 3] << 24;
 537                 pci_user_write_config_dword(dev, off, val);
 538                 off += 4;
 539                 size -= 4;
 540         }
 541
 542         if (size >= 2) {
 543                 u16 val = data[off - init_off];
 544                 val |= (u16) data[off - init_off + 1] << 8;
 545                 pci_user_write_config_word(dev, off, val);
 546                 off += 2;
 547                 size -= 2;
 548         }
 549
 550         if (size) {
 551                 pci_user_write_config_byte(dev, off, data[off - init_off]);
 552                 off++;
 553                 --size;
 554         }
 555
 556         return count;
 557 }
 558
 559 static ssize_t
 560 read_vpd_attr(struct file *filp, struct kobject *kobj,
 561               struct bin_attribute *bin_attr,
 562               char *buf, loff_t off, size_t count)
 563 {
 564         struct pci_dev *dev =
 565                 to_pci_dev(container_of(kobj, struct device, kobj));
 566
 567         if (off > bin_attr->size)
 568                 count = 0;
 569         else if (count > bin_attr->size - off)
 570                 count = bin_attr->size - off;
 571
 572         return pci_read_vpd(dev, off, count, buf);
 573 }
 574
 575 static ssize_t
 576 write_vpd_attr(struct file *filp, struct kobject *kobj,
 577                struct bin_attribute *bin_attr,
 578                char *buf, loff_t off, size_t count)
 579 {
 580         struct pci_dev *dev =
 581                 to_pci_dev(container_of(kobj, struct device, kobj));
 582
 583         if (off > bin_attr->size)
 584                 count = 0;
 585         else if (count > bin_attr->size - off)
 586                 count = bin_attr->size - off;
 587
 588         return pci_write_vpd(dev, off, count, buf);
 589 }
 590
 591 #ifdef HAVE_PCI_LEGACY
 592 /**
 593  * pci_read_legacy_io - read byte(s) from legacy I/O port space
 594  * @filp: open sysfs file
 595  * @kobj: kobject corresponding to file to read from
 596  * @bin_attr: struct bin_attribute for this file
 597  * @buf: buffer to store results
 598  * @off: offset into legacy I/O port space
 599  * @count: number of bytes to read
 600  *
 601  * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific
 602  * callback routine (pci_legacy_read).
 603  */
 604 static ssize_t
 605 pci_read_legacy_io(struct file *filp, struct kobject *kobj,
 606                    struct bin_attribute *bin_attr,
 607                    char *buf, loff_t off, size_t count)
 608 {
 609         struct pci_bus *bus = to_pci_bus(container_of(kobj,
 610                                                       struct device,
 611                                                       kobj));
 612
 613         /* Only support 1, 2 or 4 byte accesses */
 614         if (count != 1 && count != 2 && count != 4)
 615                 return -EINVAL;
 616
 617         return pci_legacy_read(bus, off, (u32 *)buf, count);
 618 }
 619
 620 /**
 621  * pci_write_legacy_io - write byte(s) to legacy I/O port space
 622  * @filp: open sysfs file
 623  * @kobj: kobject corresponding to file to read from
 624  * @bin_attr: struct bin_attribute for this file
 625  * @buf: buffer containing value to be written
 626  * @off: offset into legacy I/O port space
 627  * @count: number of bytes to write
 628  *
 629  * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific
 630  * callback routine (pci_legacy_write).
 631  */
 632 static ssize_t
 633 pci_write_legacy_io(struct file *filp, struct kobject *kobj,
 634                     struct bin_attribute *bin_attr,
 635                     char *buf, loff_t off, size_t count)
 636 {
 637         struct pci_bus *bus = to_pci_bus(container_of(kobj,
 638                                                       struct device,
 639                                                       kobj));
 640         /* Only support 1, 2 or 4 byte accesses */
 641         if (count != 1 && count != 2 && count != 4)
 642                 return -EINVAL;
 643
 644         return pci_legacy_write(bus, off, *(u32 *)buf, count);
 645 }
 646
 647 /**
 648  * pci_mmap_legacy_mem - map legacy PCI memory into user memory space
 649  * @filp: open sysfs file
 650  * @kobj: kobject corresponding to device to be mapped
 651  * @attr: struct bin_attribute for this file
 652  * @vma: struct vm_area_struct passed to mmap
 653  *
 654  * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap
 655  * legacy memory space (first meg of bus space) into application virtual
 656  * memory space.
 657  */
 658 static int
 659 pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj,
 660                     struct bin_attribute *attr,
 661                     struct vm_area_struct *vma)
 662 {
 663         struct pci_bus *bus = to_pci_bus(container_of(kobj,
 664                                                       struct device,
 665                                                       kobj));
 666
 667         return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem);
 668 }
 669
 670 /**
 671  * pci_mmap_legacy_io - map legacy PCI IO into user memory space
 672  * @filp: open sysfs file
 673  * @kobj: kobject corresponding to device to be mapped
 674  * @attr: struct bin_attribute for this file
 675  * @vma: struct vm_area_struct passed to mmap
 676  *
 677  * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap
 678  * legacy IO space (first meg of bus space) into application virtual
 679  * memory space. Returns -ENOSYS if the operation isn't supported
 680  */
 681 static int
 682 pci_mmap_legacy_io(struct file *filp, struct kobject *kobj,
 683                    struct bin_attribute *attr,
 684                    struct vm_area_struct *vma)
 685 {
 686         struct pci_bus *bus = to_pci_bus(container_of(kobj,
 687                                                       struct device,
 688                                                       kobj));
 689
 690         return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io);
 691 }
 692
 693 /**
 694  * pci_adjust_legacy_attr - adjustment of legacy file attributes
 695  * @b: bus to create files under
 696  * @mmap_type: I/O port or memory
 697  *
 698  * Stub implementation. Can be overridden by arch if necessary.
 699  */
 700 void __weak
 701 pci_adjust_legacy_attr(struct pci_bus *b, enum pci_mmap_state mmap_type)
 702 {
 703         return;
 704 }
 705
 706 /**
 707  * pci_create_legacy_files - create legacy I/O port and memory files
 708  * @b: bus to create files under
 709  *
 710  * Some platforms allow access to legacy I/O port and ISA memory space on
 711  * a per-bus basis.  This routine creates the files and ties them into
 712  * their associated read, write and mmap files from pci-sysfs.c
 713  *
 714  * On error unwind, but don't propagate the error to the caller
 715  * as it is ok to set up the PCI bus without these files.
 716  */
 717 void pci_create_legacy_files(struct pci_bus *b)
 718 {
 719         int error;
 720
 721         b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2,
 722                                GFP_ATOMIC);
 723         if (!b->legacy_io)
 724                 goto kzalloc_err;
 725
 726         sysfs_bin_attr_init(b->legacy_io);
 727         b->legacy_io->attr.name = "legacy_io";
 728         b->legacy_io->size = 0xffff;
 729         b->legacy_io->attr.mode = S_IRUSR | S_IWUSR;
 730         b->legacy_io->read = pci_read_legacy_io;
 731         b->legacy_io->write = pci_write_legacy_io;
 732         b->legacy_io->mmap = pci_mmap_legacy_io;
 733         pci_adjust_legacy_attr(b, pci_mmap_io);
 734         error = device_create_bin_file(&b->dev, b->legacy_io);
 735         if (error)
 736                 goto legacy_io_err;
 737
 738         /* Allocated above after the legacy_io struct */
 739         b->legacy_mem = b->legacy_io + 1;
 740         sysfs_bin_attr_init(b->legacy_mem);
 741         b->legacy_mem->attr.name = "legacy_mem";
 742         b->legacy_mem->size = 1024*1024;
 743         b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR;
 744         b->legacy_mem->mmap = pci_mmap_legacy_mem;
 745         pci_adjust_legacy_attr(b, pci_mmap_mem);
 746         error = device_create_bin_file(&b->dev, b->legacy_mem);
 747         if (error)
 748                 goto legacy_mem_err;
 749
 750         return;
 751
 752 legacy_mem_err:
 753         device_remove_bin_file(&b->dev, b->legacy_io);
 754 legacy_io_err:
 755         kfree(b->legacy_io);
 756         b->legacy_io = NULL;
 757 kzalloc_err:
 758         printk(KERN_WARNING "pci: warning: could not create legacy I/O port "
 759                "and ISA memory resources to sysfs\n");
 760         return;
 761 }
 762
 763 void pci_remove_legacy_files(struct pci_bus *b)
 764 {
 765         if (b->legacy_io) {
 766                 device_remove_bin_file(&b->dev, b->legacy_io);
 767                 device_remove_bin_file(&b->dev, b->legacy_mem);
 768                 kfree(b->legacy_io); /* both are allocated here */
 769         }
 770 }
 771 #endif /* HAVE_PCI_LEGACY */
 772
 773 #ifdef HAVE_PCI_MMAP
 774
 775 int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma,
 776                   enum pci_mmap_api mmap_api)
 777 {
 778         unsigned long nr, start, size, pci_start;
 779
 780         if (pci_resource_len(pdev, resno) == 0)
 781                 return 0;
 782         nr = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
 783         start = vma->vm_pgoff;
 784         size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1;
 785         pci_start = (mmap_api == PCI_MMAP_PROCFS) ?
 786                         pci_resource_start(pdev, resno) >> PAGE_SHIFT : 0;
 787         if (start >= pci_start && start < pci_start + size &&
 788                         start + nr <= pci_start + size)
 789                 return 1;
 790         return 0;
 791 }
 792
 793 /**
 794  * pci_mmap_resource - map a PCI resource into user memory space
 795  * @kobj: kobject for mapping
 796  * @attr: struct bin_attribute for the file being mapped
 797  * @vma: struct vm_area_struct passed into the mmap
 798  * @write_combine: 1 for write_combine mapping
 799  *
 800  * Use the regular PCI mapping routines to map a PCI resource into userspace.
 801  */
 802 static int
 803 pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
 804                   struct vm_area_struct *vma, int write_combine)
 805 {
 806         struct pci_dev *pdev = to_pci_dev(container_of(kobj,
 807                                                        struct device, kobj));
 808         struct resource *res = attr->private;
 809         enum pci_mmap_state mmap_type;
 810         resource_size_t start, end;
 811         int i;
 812
 813         for (i = 0; i < PCI_ROM_RESOURCE; i++)
 814                 if (res == &pdev->resource[i])
 815                         break;
 816         if (i >= PCI_ROM_RESOURCE)
 817                 return -ENODEV;
 818
 819         if (!pci_mmap_fits(pdev, i, vma, PCI_MMAP_SYSFS)) {
 820                 WARN(1, "process \"%s\" tried to map 0x%08lx bytes "
 821                         "at page 0x%08lx on %s BAR %d (start 0x%16Lx, size 0x%16Lx)\n",
 822                         current->comm, vma->vm_end-vma->vm_start, vma->vm_pgoff,
 823                         pci_name(pdev), i,
 824                         (u64)pci_resource_start(pdev, i),
 825                         (u64)pci_resource_len(pdev, i));
 826                 return -EINVAL;
 827         }
 828
 829         /* pci_mmap_page_range() expects the same kind of entry as coming
 830          * from /proc/bus/pci/ which is a "user visible" value. If this is
 831          * different from the resource itself, arch will do necessary fixup.
 832          */
 833         pci_resource_to_user(pdev, i, res, &start, &end);
 834         vma->vm_pgoff += start >> PAGE_SHIFT;
 835         mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;
 836
 837         if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(start))
 838                 return -EINVAL;
 839
 840         return pci_mmap_page_range(pdev, vma, mmap_type, write_combine);
 841 }
 842
 843 static int
 844 pci_mmap_resource_uc(struct file *filp, struct kobject *kobj,
 845                      struct bin_attribute *attr,
 846                      struct vm_area_struct *vma)
 847 {
 848         return pci_mmap_resource(kobj, attr, vma, 0);
 849 }
 850
 851 static int
 852 pci_mmap_resource_wc(struct file *filp, struct kobject *kobj,
 853                      struct bin_attribute *attr,
 854                      struct vm_area_struct *vma)
 855 {
 856         return pci_mmap_resource(kobj, attr, vma, 1);
 857 }
 858
 859 static ssize_t
 860 pci_resource_io(struct file *filp, struct kobject *kobj,
 861                 struct bin_attribute *attr, char *buf,
 862                 loff_t off, size_t count, bool write)
 863 {
 864         struct pci_dev *pdev = to_pci_dev(container_of(kobj,
 865                                                        struct device, kobj));
 866         struct resource *res = attr->private;
 867         unsigned long port = off;
 868         int i;
 869
 870         for (i = 0; i < PCI_ROM_RESOURCE; i++)
 871                 if (res == &pdev->resource[i])
 872                         break;
 873         if (i >= PCI_ROM_RESOURCE)
 874                 return -ENODEV;
 875
 876         port += pci_resource_start(pdev, i);
 877
 878         if (port > pci_resource_end(pdev, i))
 879                 return 0;
 880
 881         if (port + count - 1 > pci_resource_end(pdev, i))
 882                 return -EINVAL;
 883
 884         switch (count) {
 885         case 1:
 886                 if (write)
 887                         outb(*(u8 *)buf, port);
 888                 else
 889                         *(u8 *)buf = inb(port);
 890                 return 1;
 891         case 2:
 892                 if (write)
 893                         outw(*(u16 *)buf, port);
 894                 else
 895                         *(u16 *)buf = inw(port);
 896                 return 2;
 897         case 4:
 898                 if (write)
 899                         outl(*(u32 *)buf, port);
 900                 else
 901                         *(u32 *)buf = inl(port);
 902                 return 4;
 903         }
 904         return -EINVAL;
 905 }
 906
 907 static ssize_t
 908 pci_read_resource_io(struct file *filp, struct kobject *kobj,
 909                      struct bin_attribute *attr, char *buf,
 910                      loff_t off, size_t count)
 911 {
 912         return pci_resource_io(filp, kobj, attr, buf, off, count, false);
 913 }
 914
 915 static ssize_t
 916 pci_write_resource_io(struct file *filp, struct kobject *kobj,
 917                       struct bin_attribute *attr, char *buf,
 918                       loff_t off, size_t count)
 919 {
 920         return pci_resource_io(filp, kobj, attr, buf, off, count, true);
 921 }
 922
 923 /**
 924  * pci_remove_resource_files - cleanup resource files
 925  * @pdev: dev to cleanup
 926  *
 927  * If we created resource files for @pdev, remove them from sysfs and
 928  * free their resources.
 929  */
 930 static void
 931 pci_remove_resource_files(struct pci_dev *pdev)
 932 {
 933         int i;
 934
 935         for (i = 0; i < PCI_ROM_RESOURCE; i++) {
 936                 struct bin_attribute *res_attr;
 937
 938                 res_attr = pdev->res_attr[i];
 939                 if (res_attr) {
 940                         sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
 941                         kfree(res_attr);
 942                 }
 943
 944                 res_attr = pdev->res_attr_wc[i];
 945                 if (res_attr) {
 946                         sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
 947                         kfree(res_attr);
 948                 }
 949         }
 950 }
 951
 952 static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine)
 953 {
 954         /* allocate attribute structure, piggyback attribute name */
 955         int name_len = write_combine ? 13 : 10;
 956         struct bin_attribute *res_attr;
 957         int retval;
 958
 959         res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC);
 960         if (res_attr) {
 961                 char *res_attr_name = (char *)(res_attr + 1);
 962
 963                 sysfs_bin_attr_init(res_attr);
 964                 if (write_combine) {
 965                         pdev->res_attr_wc[num] = res_attr;
 966                         sprintf(res_attr_name, "resource%d_wc", num);
 967                         res_attr->mmap = pci_mmap_resource_wc;
 968                 } else {
 969                         pdev->res_attr[num] = res_attr;
 970                         sprintf(res_attr_name, "resource%d", num);
 971                         res_attr->mmap = pci_mmap_resource_uc;
 972                 }
 973                 if (pci_resource_flags(pdev, num) & IORESOURCE_IO) {
 974                         res_attr->read = pci_read_resource_io;
 975                         res_attr->write = pci_write_resource_io;
 976                 }
 977                 res_attr->attr.name = res_attr_name;
 978                 res_attr->attr.mode = S_IRUSR | S_IWUSR;
 979                 res_attr->size = pci_resource_len(pdev, num);
 980                 res_attr->private = &pdev->resource[num];
 981                 retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr);
 982         } else
 983                 retval = -ENOMEM;
 984
 985         return retval;
 986 }
 987
 988 /**
 989  * pci_create_resource_files - create resource files in sysfs for @dev
 990  * @pdev: dev in question
 991  *
 992  * Walk the resources in @pdev creating files for each resource available.
 993  */
 994 static int pci_create_resource_files(struct pci_dev *pdev)
 995 {
 996         int i;
 997         int retval;
 998
 999         /* Expose the PCI resources from this device as files */
1000         for (i = 0; i < PCI_ROM_RESOURCE; i++) {
1001
1002                 /* skip empty resources */
1003                 if (!pci_resource_len(pdev, i))
1004                         continue;
1005
1006                 retval = pci_create_attr(pdev, i, 0);
1007                 /* for prefetchable resources, create a WC mappable file */
1008                 if (!retval && pdev->resource[i].flags & IORESOURCE_PREFETCH)
1009                         retval = pci_create_attr(pdev, i, 1);
1010
1011                 if (retval) {
1012                         pci_remove_resource_files(pdev);
1013                         return retval;
1014                 }
1015         }
1016         return 0;
1017 }
1018 #else /* !HAVE_PCI_MMAP */
1019 int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; }
1020 void __weak pci_remove_resource_files(struct pci_dev *dev) { return; }
1021 #endif /* HAVE_PCI_MMAP */
1022
1023 /**
1024  * pci_write_rom - used to enable access to the PCI ROM display
1025  * @filp: sysfs file
1026  * @kobj: kernel object handle
1027  * @bin_attr: struct bin_attribute for this file
1028  * @buf: user input
1029  * @off: file offset
1030  * @count: number of byte in input
1031  *
1032  * writing anything except 0 enables it
1033  */
1034 static ssize_t
1035 pci_write_rom(struct file *filp, struct kobject *kobj,
1036               struct bin_attribute *bin_attr,
1037               char *buf, loff_t off, size_t count)
1038 {
1039         struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
1040
1041         if ((off ==  0) && (*buf == '0') && (count == 2))
1042                 pdev->rom_attr_enabled = 0;
1043         else
1044                 pdev->rom_attr_enabled = 1;
1045
1046         return count;
1047 }
1048
1049 /**
1050  * pci_read_rom - read a PCI ROM
1051  * @filp: sysfs file
1052  * @kobj: kernel object handle
1053  * @bin_attr: struct bin_attribute for this file
1054  * @buf: where to put the data we read from the ROM
1055  * @off: file offset
1056  * @count: number of bytes to read
1057  *
1058  * Put @count bytes starting at @off into @buf from the ROM in the PCI
1059  * device corresponding to @kobj.
1060  */
1061 static ssize_t
1062 pci_read_rom(struct file *filp, struct kobject *kobj,
1063              struct bin_attribute *bin_attr,
1064              char *buf, loff_t off, size_t count)
1065 {
1066         struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
1067         void __iomem *rom;
1068         size_t size;
1069
1070         if (!pdev->rom_attr_enabled)
1071                 return -EINVAL;
1072
1073         rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */
1074         if (!rom || !size)
1075                 return -EIO;
1076
1077         if (off >= size)
1078                 count = 0;
1079         else {
1080                 if (off + count > size)
1081                         count = size - off;
1082
1083                 memcpy_fromio(buf, rom + off, count);
1084         }
1085         pci_unmap_rom(pdev, rom);
1086
1087         return count;
1088 }
1089
1090 static struct bin_attribute pci_config_attr = {
1091         .attr = {
1092                 .name = "config",
1093                 .mode = S_IRUGO | S_IWUSR,
1094         },
1095         .size = PCI_CFG_SPACE_SIZE,
1096         .read = pci_read_config,
1097         .write = pci_write_config,
1098 };
1099
1100 static struct bin_attribute pcie_config_attr = {
1101         .attr = {
1102                 .name = "config",
1103                 .mode = S_IRUGO | S_IWUSR,
1104         },
1105         .size = PCI_CFG_SPACE_EXP_SIZE,
1106         .read = pci_read_config,
1107         .write = pci_write_config,
1108 };
1109
1110 int __attribute__ ((weak)) pcibios_add_platform_entries(struct pci_dev *dev)
1111 {
1112         return 0;
1113 }
1114
1115 static ssize_t reset_store(struct device *dev,
1116                            struct device_attribute *attr, const char *buf,
1117                            size_t count)
1118 {
1119         struct pci_dev *pdev = to_pci_dev(dev);
1120         unsigned long val;
1121         ssize_t result = strict_strtoul(buf, 0, &val);
1122
1123         if (result < 0)
1124                 return result;
1125
1126         if (val != 1)
1127                 return -EINVAL;
1128
1129         result = pci_reset_function(pdev);
1130         if (result < 0)
1131                 return result;
1132
1133         return count;
1134 }
1135
1136 static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store);
1137
1138 static int pci_create_capabilities_sysfs(struct pci_dev *dev)
1139 {
1140         int retval;
1141         struct bin_attribute *attr;
1142
1143         /* If the device has VPD, try to expose it in sysfs. */
1144         if (dev->vpd) {
1145                 attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
1146                 if (!attr)
1147                         return -ENOMEM;
1148
1149                 sysfs_bin_attr_init(attr);
1150                 attr->size = dev->vpd->len;
1151                 attr->attr.name = "vpd";
1152                 attr->attr.mode = S_IRUSR | S_IWUSR;
1153                 attr->read = read_vpd_attr;
1154                 attr->write = write_vpd_attr;
1155                 retval = sysfs_create_bin_file(&dev->dev.kobj, attr);
1156                 if (retval) {
1157                         kfree(attr);
1158                         return retval;
1159                 }
1160                 dev->vpd->attr = attr;
1161         }
1162
1163         /* Active State Power Management */
1164         pcie_aspm_create_sysfs_dev_files(dev);
1165
1166         if (!pci_probe_reset_function(dev)) {
1167                 retval = device_create_file(&dev->dev, &reset_attr);
1168                 if (retval)
1169                         goto error;
1170                 dev->reset_fn = 1;
1171         }
1172         return 0;
1173
1174 error:
1175         pcie_aspm_remove_sysfs_dev_files(dev);
1176         if (dev->vpd && dev->vpd->attr) {
1177                 sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
1178                 kfree(dev->vpd->attr);
1179         }
1180
1181         return retval;
1182 }
1183
1184 int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
1185 {
1186         int retval;
1187         int rom_size = 0;
1188         struct bin_attribute *attr;
1189
1190         if (!sysfs_initialized)
1191                 return -EACCES;
1192
1193         if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
1194                 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr);
1195         else
1196                 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr);
1197         if (retval)
1198                 goto err;
1199
1200         retval = pci_create_resource_files(pdev);
1201         if (retval)
1202                 goto err_config_file;
1203
1204         if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
1205                 rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
1206         else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)
1207                 rom_size = 0x20000;
1208
1209         /* If the device has a ROM, try to expose it in sysfs. */
1210         if (rom_size) {
1211                 attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
1212                 if (!attr) {
1213                         retval = -ENOMEM;
1214                         goto err_resource_files;
1215                 }
1216                 sysfs_bin_attr_init(attr);
1217                 attr->size = rom_size;
1218                 attr->attr.name = "rom";
1219                 attr->attr.mode = S_IRUSR | S_IWUSR;
1220                 attr->read = pci_read_rom;
1221                 attr->write = pci_write_rom;
1222                 retval = sysfs_create_bin_file(&pdev->dev.kobj, attr);
1223                 if (retval) {
1224                         kfree(attr);
1225                         goto err_resource_files;
1226                 }
1227                 pdev->rom_attr = attr;
1228         }
1229
1230         if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) {
1231                 retval = device_create_file(&pdev->dev, &vga_attr);
1232                 if (retval)
1233                         goto err_rom_file;
1234         }
1235
1236         /* add platform-specific attributes */
1237         retval = pcibios_add_platform_entries(pdev);
1238         if (retval)
1239                 goto err_vga_file;
1240
1241         /* add sysfs entries for various capabilities */
1242         retval = pci_create_capabilities_sysfs(pdev);
1243         if (retval)
1244                 goto err_vga_file;
1245
1246         pci_create_firmware_label_files(pdev);
1247
1248         return 0;
1249
1250 err_vga_file:
1251         if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA)
1252                 device_remove_file(&pdev->dev, &vga_attr);
1253 err_rom_file:
1254         if (rom_size) {
1255                 sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
1256                 kfree(pdev->rom_attr);
1257                 pdev->rom_attr = NULL;
1258         }
1259 err_resource_files:
1260         pci_remove_resource_files(pdev);
1261 err_config_file:
1262         if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
1263                 sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
1264         else
1265                 sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
1266 err:
1267         return retval;
1268 }
1269
1270 static void pci_remove_capabilities_sysfs(struct pci_dev *dev)
1271 {
1272         if (dev->vpd && dev->vpd->attr) {
1273                 sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
1274                 kfree(dev->vpd->attr);
1275         }
1276
1277         pcie_aspm_remove_sysfs_dev_files(dev);
1278         if (dev->reset_fn) {
1279                 device_remove_file(&dev->dev, &reset_attr);
1280                 dev->reset_fn = 0;
1281         }
1282 }
1283
1284 /**
1285  * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files
1286  * @pdev: device whose entries we should free
1287  *
1288  * Cleanup when @pdev is removed from sysfs.
1289  */
1290 void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
1291 {
1292         int rom_size = 0;
1293
1294         if (!sysfs_initialized)
1295                 return;
1296
1297         pci_remove_capabilities_sysfs(pdev);
1298
1299         if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
1300                 sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
1301         else
1302                 sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
1303
1304         pci_remove_resource_files(pdev);
1305
1306         if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
1307                 rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
1308         else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)
1309                 rom_size = 0x20000;
1310
1311         if (rom_size && pdev->rom_attr) {
1312                 sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
1313                 kfree(pdev->rom_attr);
1314         }
1315
1316         pci_remove_firmware_label_files(pdev);
1317
1318 }
1319
1320 static int __init pci_sysfs_init(void)
1321 {
1322         struct pci_dev *pdev = NULL;
1323         int retval;
1324
1325         sysfs_initialized = 1;
1326         for_each_pci_dev(pdev) {
1327                 retval = pci_create_sysfs_dev_files(pdev);
1328                 if (retval) {
1329                         pci_dev_put(pdev);
1330                         return retval;
1331                 }
1332         }
1333
1334         return 0;
1335 }
1336
1337 late_initcall(pci_sysfs_init);