drivers/pci/vpd.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * PCI VPD support
   4  *
   5  * Copyright (C) 2010 Broadcom Corporation.
   6  */
   7
   8 #include <linux/pci.h>
   9 #include <linux/delay.h>
  10 #include <linux/export.h>
  11 #include <linux/sched/signal.h>
  12 #include "pci.h"
  13
  14 /* VPD access through PCI 2.2+ VPD capability */
  15
  16 struct pci_vpd_ops {
  17         ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
  18         ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
  19         int (*set_size)(struct pci_dev *dev, size_t len);
  20 };
  21
  22 struct pci_vpd {
  23         const struct pci_vpd_ops *ops;
  24         struct bin_attribute *attr;     /* Descriptor for sysfs VPD entry */
  25         struct mutex    lock;
  26         unsigned int    len;
  27         u16             flag;
  28         u8              cap;
  29         unsigned int    busy:1;
  30         unsigned int    valid:1;
  31 };
  32
  33 /**
  34  * pci_read_vpd - Read one entry from Vital Product Data
  35  * @dev:        pci device struct
  36  * @pos:        offset in vpd space
  37  * @count:      number of bytes to read
  38  * @buf:        pointer to where to store result
  39  */
  40 ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf)
  41 {
  42         if (!dev->vpd || !dev->vpd->ops)
  43                 return -ENODEV;
  44         return dev->vpd->ops->read(dev, pos, count, buf);
  45 }
  46 EXPORT_SYMBOL(pci_read_vpd);
  47
  48 /**
  49  * pci_write_vpd - Write entry to Vital Product Data
  50  * @dev:        pci device struct
  51  * @pos:        offset in vpd space
  52  * @count:      number of bytes to write
  53  * @buf:        buffer containing write data
  54  */
  55 ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf)
  56 {
  57         if (!dev->vpd || !dev->vpd->ops)
  58                 return -ENODEV;
  59         return dev->vpd->ops->write(dev, pos, count, buf);
  60 }
  61 EXPORT_SYMBOL(pci_write_vpd);
  62
  63 /**
  64  * pci_set_vpd_size - Set size of Vital Product Data space
  65  * @dev:        pci device struct
  66  * @len:        size of vpd space
  67  */
  68 int pci_set_vpd_size(struct pci_dev *dev, size_t len)
  69 {
  70         if (!dev->vpd || !dev->vpd->ops)
  71                 return -ENODEV;
  72         return dev->vpd->ops->set_size(dev, len);
  73 }
  74 EXPORT_SYMBOL(pci_set_vpd_size);
  75
  76 #define PCI_VPD_MAX_SIZE (PCI_VPD_ADDR_MASK + 1)
  77
  78 /**
  79  * pci_vpd_size - determine actual size of Vital Product Data
  80  * @dev:        pci device struct
  81  * @old_size:   current assumed size, also maximum allowed size
  82  */
  83 static size_t pci_vpd_size(struct pci_dev *dev, size_t old_size)
  84 {
  85         size_t off = 0;
  86         unsigned char header[1+2];      /* 1 byte tag, 2 bytes length */
  87
  88         while (off < old_size &&
  89                pci_read_vpd(dev, off, 1, header) == 1) {
  90                 unsigned char tag;
  91
  92                 if (header[0] & PCI_VPD_LRDT) {
  93                         /* Large Resource Data Type Tag */
  94                         tag = pci_vpd_lrdt_tag(header);
  95                         /* Only read length from known tag items */
  96                         if ((tag == PCI_VPD_LTIN_ID_STRING) ||
  97                             (tag == PCI_VPD_LTIN_RO_DATA) ||
  98                             (tag == PCI_VPD_LTIN_RW_DATA)) {
  99                                 if (pci_read_vpd(dev, off+1, 2,
 100                                                  &header[1]) != 2) {
 101                                         pci_warn(dev, "invalid large VPD tag %02x size at offset %zu",
 102                                                  tag, off + 1);
 103                                         return 0;
 104                                 }
 105                                 off += PCI_VPD_LRDT_TAG_SIZE +
 106                                         pci_vpd_lrdt_size(header);
 107                         }
 108                 } else {
 109                         /* Short Resource Data Type Tag */
 110                         off += PCI_VPD_SRDT_TAG_SIZE +
 111                                 pci_vpd_srdt_size(header);
 112                         tag = pci_vpd_srdt_tag(header);
 113                 }
 114
 115                 if (tag == PCI_VPD_STIN_END)    /* End tag descriptor */
 116                         return off;
 117
 118                 if ((tag != PCI_VPD_LTIN_ID_STRING) &&
 119                     (tag != PCI_VPD_LTIN_RO_DATA) &&
 120                     (tag != PCI_VPD_LTIN_RW_DATA)) {
 121                         pci_warn(dev, "invalid %s VPD tag %02x at offset %zu",
 122                                  (header[0] & PCI_VPD_LRDT) ? "large" : "short",
 123                                  tag, off);
 124                         return 0;
 125                 }
 126         }
 127         return 0;
 128 }
 129
 130 /*
 131  * Wait for last operation to complete.
 132  * This code has to spin since there is no other notification from the PCI
 133  * hardware. Since the VPD is often implemented by serial attachment to an
 134  * EEPROM, it may take many milliseconds to complete.
 135  *
 136  * Returns 0 on success, negative values indicate error.
 137  */
 138 static int pci_vpd_wait(struct pci_dev *dev)
 139 {
 140         struct pci_vpd *vpd = dev->vpd;
 141         unsigned long timeout = jiffies + msecs_to_jiffies(125);
 142         unsigned long max_sleep = 16;
 143         u16 status;
 144         int ret;
 145
 146         if (!vpd->busy)
 147                 return 0;
 148
 149         do {
 150                 ret = pci_user_read_config_word(dev, vpd->cap + PCI_VPD_ADDR,
 151                                                 &status);
 152                 if (ret < 0)
 153                         return ret;
 154
 155                 if ((status & PCI_VPD_ADDR_F) == vpd->flag) {
 156                         vpd->busy = 0;
 157                         return 0;
 158                 }
 159
 160                 if (fatal_signal_pending(current))
 161                         return -EINTR;
 162
 163                 if (time_after(jiffies, timeout))
 164                         break;
 165
 166                 usleep_range(10, max_sleep);
 167                 if (max_sleep < 1024)
 168                         max_sleep *= 2;
 169         } while (true);
 170
 171         pci_warn(dev, "VPD access failed.  This is likely a firmware bug on this device.  Contact the card vendor for a firmware update\n");
 172         return -ETIMEDOUT;
 173 }
 174
 175 static ssize_t pci_vpd_read(struct pci_dev *dev, loff_t pos, size_t count,
 176                             void *arg)
 177 {
 178         struct pci_vpd *vpd = dev->vpd;
 179         int ret;
 180         loff_t end = pos + count;
 181         u8 *buf = arg;
 182
 183         if (pos < 0)
 184                 return -EINVAL;
 185
 186         if (!vpd->valid) {
 187                 vpd->valid = 1;
 188                 vpd->len = pci_vpd_size(dev, vpd->len);
 189         }
 190
 191         if (vpd->len == 0)
 192                 return -EIO;
 193
 194         if (pos > vpd->len)
 195                 return 0;
 196
 197         if (end > vpd->len) {
 198                 end = vpd->len;
 199                 count = end - pos;
 200         }
 201
 202         if (mutex_lock_killable(&vpd->lock))
 203                 return -EINTR;
 204
 205         ret = pci_vpd_wait(dev);
 206         if (ret < 0)
 207                 goto out;
 208
 209         while (pos < end) {
 210                 u32 val;
 211                 unsigned int i, skip;
 212
 213                 ret = pci_user_write_config_word(dev, vpd->cap + PCI_VPD_ADDR,
 214                                                  pos & ~3);
 215                 if (ret < 0)
 216                         break;
 217                 vpd->busy = 1;
 218                 vpd->flag = PCI_VPD_ADDR_F;
 219                 ret = pci_vpd_wait(dev);
 220                 if (ret < 0)
 221                         break;
 222
 223                 ret = pci_user_read_config_dword(dev, vpd->cap + PCI_VPD_DATA, &val);
 224                 if (ret < 0)
 225                         break;
 226
 227                 skip = pos & 3;
 228                 for (i = 0;  i < sizeof(u32); i++) {
 229                         if (i >= skip) {
 230                                 *buf++ = val;
 231                                 if (++pos == end)
 232                                         break;
 233                         }
 234                         val >>= 8;
 235                 }
 236         }
 237 out:
 238         mutex_unlock(&vpd->lock);
 239         return ret ? ret : count;
 240 }
 241
 242 static ssize_t pci_vpd_write(struct pci_dev *dev, loff_t pos, size_t count,
 243                              const void *arg)
 244 {
 245         struct pci_vpd *vpd = dev->vpd;
 246         const u8 *buf = arg;
 247         loff_t end = pos + count;
 248         int ret = 0;
 249
 250         if (pos < 0 || (pos & 3) || (count & 3))
 251                 return -EINVAL;
 252
 253         if (!vpd->valid) {
 254                 vpd->valid = 1;
 255                 vpd->len = pci_vpd_size(dev, vpd->len);
 256         }
 257
 258         if (vpd->len == 0)
 259                 return -EIO;
 260
 261         if (end > vpd->len)
 262                 return -EINVAL;
 263
 264         if (mutex_lock_killable(&vpd->lock))
 265                 return -EINTR;
 266
 267         ret = pci_vpd_wait(dev);
 268         if (ret < 0)
 269                 goto out;
 270
 271         while (pos < end) {
 272                 u32 val;
 273
 274                 val = *buf++;
 275                 val |= *buf++ << 8;
 276                 val |= *buf++ << 16;
 277                 val |= *buf++ << 24;
 278
 279                 ret = pci_user_write_config_dword(dev, vpd->cap + PCI_VPD_DATA, val);
 280                 if (ret < 0)
 281                         break;
 282                 ret = pci_user_write_config_word(dev, vpd->cap + PCI_VPD_ADDR,
 283                                                  pos | PCI_VPD_ADDR_F);
 284                 if (ret < 0)
 285                         break;
 286
 287                 vpd->busy = 1;
 288                 vpd->flag = 0;
 289                 ret = pci_vpd_wait(dev);
 290                 if (ret < 0)
 291                         break;
 292
 293                 pos += sizeof(u32);
 294         }
 295 out:
 296         mutex_unlock(&vpd->lock);
 297         return ret ? ret : count;
 298 }
 299
 300 static int pci_vpd_set_size(struct pci_dev *dev, size_t len)
 301 {
 302         struct pci_vpd *vpd = dev->vpd;
 303
 304         if (len == 0 || len > PCI_VPD_MAX_SIZE)
 305                 return -EIO;
 306
 307         vpd->valid = 1;
 308         vpd->len = len;
 309
 310         return 0;
 311 }
 312
 313 static const struct pci_vpd_ops pci_vpd_ops = {
 314         .read = pci_vpd_read,
 315         .write = pci_vpd_write,
 316         .set_size = pci_vpd_set_size,
 317 };
 318
 319 static ssize_t pci_vpd_f0_read(struct pci_dev *dev, loff_t pos, size_t count,
 320                                void *arg)
 321 {
 322         struct pci_dev *tdev = pci_get_slot(dev->bus,
 323                                             PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
 324         ssize_t ret;
 325
 326         if (!tdev)
 327                 return -ENODEV;
 328
 329         ret = pci_read_vpd(tdev, pos, count, arg);
 330         pci_dev_put(tdev);
 331         return ret;
 332 }
 333
 334 static ssize_t pci_vpd_f0_write(struct pci_dev *dev, loff_t pos, size_t count,
 335                                 const void *arg)
 336 {
 337         struct pci_dev *tdev = pci_get_slot(dev->bus,
 338                                             PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
 339         ssize_t ret;
 340
 341         if (!tdev)
 342                 return -ENODEV;
 343
 344         ret = pci_write_vpd(tdev, pos, count, arg);
 345         pci_dev_put(tdev);
 346         return ret;
 347 }
 348
 349 static int pci_vpd_f0_set_size(struct pci_dev *dev, size_t len)
 350 {
 351         struct pci_dev *tdev = pci_get_slot(dev->bus,
 352                                             PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
 353         int ret;
 354
 355         if (!tdev)
 356                 return -ENODEV;
 357
 358         ret = pci_set_vpd_size(tdev, len);
 359         pci_dev_put(tdev);
 360         return ret;
 361 }
 362
 363 static const struct pci_vpd_ops pci_vpd_f0_ops = {
 364         .read = pci_vpd_f0_read,
 365         .write = pci_vpd_f0_write,
 366         .set_size = pci_vpd_f0_set_size,
 367 };
 368
 369 int pci_vpd_init(struct pci_dev *dev)
 370 {
 371         struct pci_vpd *vpd;
 372         u8 cap;
 373
 374         cap = pci_find_capability(dev, PCI_CAP_ID_VPD);
 375         if (!cap)
 376                 return -ENODEV;
 377
 378         vpd = kzalloc(sizeof(*vpd), GFP_ATOMIC);
 379         if (!vpd)
 380                 return -ENOMEM;
 381
 382         vpd->len = PCI_VPD_MAX_SIZE;
 383         if (dev->dev_flags & PCI_DEV_FLAGS_VPD_REF_F0)
 384                 vpd->ops = &pci_vpd_f0_ops;
 385         else
 386                 vpd->ops = &pci_vpd_ops;
 387         mutex_init(&vpd->lock);
 388         vpd->cap = cap;
 389         vpd->busy = 0;
 390         vpd->valid = 0;
 391         dev->vpd = vpd;
 392         return 0;
 393 }
 394
 395 void pci_vpd_release(struct pci_dev *dev)
 396 {
 397         kfree(dev->vpd);
 398 }
 399
 400 static ssize_t read_vpd_attr(struct file *filp, struct kobject *kobj,
 401                              struct bin_attribute *bin_attr, char *buf,
 402                              loff_t off, size_t count)
 403 {
 404         struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj));
 405
 406         if (bin_attr->size > 0) {
 407                 if (off > bin_attr->size)
 408                         count = 0;
 409                 else if (count > bin_attr->size - off)
 410                         count = bin_attr->size - off;
 411         }
 412
 413         return pci_read_vpd(dev, off, count, buf);
 414 }
 415
 416 static ssize_t write_vpd_attr(struct file *filp, struct kobject *kobj,
 417                               struct bin_attribute *bin_attr, char *buf,
 418                               loff_t off, size_t count)
 419 {
 420         struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj));
 421
 422         if (bin_attr->size > 0) {
 423                 if (off > bin_attr->size)
 424                         count = 0;
 425                 else if (count > bin_attr->size - off)
 426                         count = bin_attr->size - off;
 427         }
 428
 429         return pci_write_vpd(dev, off, count, buf);
 430 }
 431
 432 void pcie_vpd_create_sysfs_dev_files(struct pci_dev *dev)
 433 {
 434         int retval;
 435         struct bin_attribute *attr;
 436
 437         if (!dev->vpd)
 438                 return;
 439
 440         attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
 441         if (!attr)
 442                 return;
 443
 444         sysfs_bin_attr_init(attr);
 445         attr->size = 0;
 446         attr->attr.name = "vpd";
 447         attr->attr.mode = S_IRUSR | S_IWUSR;
 448         attr->read = read_vpd_attr;
 449         attr->write = write_vpd_attr;
 450         retval = sysfs_create_bin_file(&dev->dev.kobj, attr);
 451         if (retval) {
 452                 kfree(attr);
 453                 return;
 454         }
 455
 456         dev->vpd->attr = attr;
 457 }
 458
 459 void pcie_vpd_remove_sysfs_dev_files(struct pci_dev *dev)
 460 {
 461         if (dev->vpd && dev->vpd->attr) {
 462                 sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
 463                 kfree(dev->vpd->attr);
 464         }
 465 }
 466
 467 int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt)
 468 {
 469         int i;
 470
 471         for (i = off; i < len; ) {
 472                 u8 val = buf[i];
 473
 474                 if (val & PCI_VPD_LRDT) {
 475                         /* Don't return success of the tag isn't complete */
 476                         if (i + PCI_VPD_LRDT_TAG_SIZE > len)
 477                                 break;
 478
 479                         if (val == rdt)
 480                                 return i;
 481
 482                         i += PCI_VPD_LRDT_TAG_SIZE +
 483                              pci_vpd_lrdt_size(&buf[i]);
 484                 } else {
 485                         u8 tag = val & ~PCI_VPD_SRDT_LEN_MASK;
 486
 487                         if (tag == rdt)
 488                                 return i;
 489
 490                         if (tag == PCI_VPD_SRDT_END)
 491                                 break;
 492
 493                         i += PCI_VPD_SRDT_TAG_SIZE +
 494                              pci_vpd_srdt_size(&buf[i]);
 495                 }
 496         }
 497
 498         return -ENOENT;
 499 }
 500 EXPORT_SYMBOL_GPL(pci_vpd_find_tag);
 501
 502 int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
 503                               unsigned int len, const char *kw)
 504 {
 505         int i;
 506
 507         for (i = off; i + PCI_VPD_INFO_FLD_HDR_SIZE <= off + len;) {
 508                 if (buf[i + 0] == kw[0] &&
 509                     buf[i + 1] == kw[1])
 510                         return i;
 511
 512                 i += PCI_VPD_INFO_FLD_HDR_SIZE +
 513                      pci_vpd_info_field_size(&buf[i]);
 514         }
 515
 516         return -ENOENT;
 517 }
 518 EXPORT_SYMBOL_GPL(pci_vpd_find_info_keyword);
 519
 520 #ifdef CONFIG_PCI_QUIRKS
 521 /*
 522  * Quirk non-zero PCI functions to route VPD access through function 0 for
 523  * devices that share VPD resources between functions.  The functions are
 524  * expected to be identical devices.
 525  */
 526 static void quirk_f0_vpd_link(struct pci_dev *dev)
 527 {
 528         struct pci_dev *f0;
 529
 530         if (!PCI_FUNC(dev->devfn))
 531                 return;
 532
 533         f0 = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
 534         if (!f0)
 535                 return;
 536
 537         if (f0->vpd && dev->class == f0->class &&
 538             dev->vendor == f0->vendor && dev->device == f0->device)
 539                 dev->dev_flags |= PCI_DEV_FLAGS_VPD_REF_F0;
 540
 541         pci_dev_put(f0);
 542 }
 543 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
 544                               PCI_CLASS_NETWORK_ETHERNET, 8, quirk_f0_vpd_link);
 545
 546 /*
 547  * If a device follows the VPD format spec, the PCI core will not read or
 548  * write past the VPD End Tag.  But some vendors do not follow the VPD
 549  * format spec, so we can't tell how much data is safe to access.  Devices
 550  * may behave unpredictably if we access too much.  Blacklist these devices
 551  * so we don't touch VPD at all.
 552  */
 553 static void quirk_blacklist_vpd(struct pci_dev *dev)
 554 {
 555         if (dev->vpd) {
 556                 dev->vpd->len = 0;
 557                 pci_warn(dev, FW_BUG "disabling VPD access (can't determine size of non-standard VPD format)\n");
 558         }
 559 }
 560 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x0060, quirk_blacklist_vpd);
 561 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x007c, quirk_blacklist_vpd);
 562 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x0413, quirk_blacklist_vpd);
 563 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x0078, quirk_blacklist_vpd);
 564 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x0079, quirk_blacklist_vpd);
 565 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x0073, quirk_blacklist_vpd);
 566 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x0071, quirk_blacklist_vpd);
 567 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x005b, quirk_blacklist_vpd);
 568 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x002f, quirk_blacklist_vpd);
 569 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x005d, quirk_blacklist_vpd);
 570 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x005f, quirk_blacklist_vpd);
 571 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, PCI_ANY_ID,
 572                 quirk_blacklist_vpd);
 573 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_QLOGIC, 0x2261, quirk_blacklist_vpd);
 574
 575 /*
 576  * For Broadcom 5706, 5708, 5709 rev. A nics, any read beyond the
 577  * VPD end tag will hang the device.  This problem was initially
 578  * observed when a vpd entry was created in sysfs
 579  * ('/sys/bus/pci/devices/<id>/vpd').   A read to this sysfs entry
 580  * will dump 32k of data.  Reading a full 32k will cause an access
 581  * beyond the VPD end tag causing the device to hang.  Once the device
 582  * is hung, the bnx2 driver will not be able to reset the device.
 583  * We believe that it is legal to read beyond the end tag and
 584  * therefore the solution is to limit the read/write length.
 585  */
 586 static void quirk_brcm_570x_limit_vpd(struct pci_dev *dev)
 587 {
 588         /*
 589          * Only disable the VPD capability for 5706, 5706S, 5708,
 590          * 5708S and 5709 rev. A
 591          */
 592         if ((dev->device == PCI_DEVICE_ID_NX2_5706) ||
 593             (dev->device == PCI_DEVICE_ID_NX2_5706S) ||
 594             (dev->device == PCI_DEVICE_ID_NX2_5708) ||
 595             (dev->device == PCI_DEVICE_ID_NX2_5708S) ||
 596             ((dev->device == PCI_DEVICE_ID_NX2_5709) &&
 597              (dev->revision & 0xf0) == 0x0)) {
 598                 if (dev->vpd)
 599                         dev->vpd->len = 0x80;
 600         }
 601 }
 602 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
 603                         PCI_DEVICE_ID_NX2_5706,
 604                         quirk_brcm_570x_limit_vpd);
 605 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
 606                         PCI_DEVICE_ID_NX2_5706S,
 607                         quirk_brcm_570x_limit_vpd);
 608 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
 609                         PCI_DEVICE_ID_NX2_5708,
 610                         quirk_brcm_570x_limit_vpd);
 611 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
 612                         PCI_DEVICE_ID_NX2_5708S,
 613                         quirk_brcm_570x_limit_vpd);
 614 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
 615                         PCI_DEVICE_ID_NX2_5709,
 616                         quirk_brcm_570x_limit_vpd);
 617 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
 618                         PCI_DEVICE_ID_NX2_5709S,
 619                         quirk_brcm_570x_limit_vpd);
 620
 621 static void quirk_chelsio_extend_vpd(struct pci_dev *dev)
 622 {
 623         int chip = (dev->device & 0xf000) >> 12;
 624         int func = (dev->device & 0x0f00) >>  8;
 625         int prod = (dev->device & 0x00ff) >>  0;
 626
 627         /*
 628          * If this is a T3-based adapter, there's a 1KB VPD area at offset
 629          * 0xc00 which contains the preferred VPD values.  If this is a T4 or
 630          * later based adapter, the special VPD is at offset 0x400 for the
 631          * Physical Functions (the SR-IOV Virtual Functions have no VPD
 632          * Capabilities).  The PCI VPD Access core routines will normally
 633          * compute the size of the VPD by parsing the VPD Data Structure at
 634          * offset 0x000.  This will result in silent failures when attempting
 635          * to accesses these other VPD areas which are beyond those computed
 636          * limits.
 637          */
 638         if (chip == 0x0 && prod >= 0x20)
 639                 pci_set_vpd_size(dev, 8192);
 640         else if (chip >= 0x4 && func < 0x8)
 641                 pci_set_vpd_size(dev, 2048);
 642 }
 643
 644 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, PCI_ANY_ID,
 645                         quirk_chelsio_extend_vpd);
 646
 647 #endif