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