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b55ac1b2 MC |
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 | ||
10 | int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt) | |
11 | { | |
12 | int i; | |
13 | ||
14 | for (i = off; i < len; ) { | |
15 | u8 val = buf[i]; | |
16 | ||
17 | if (val & PCI_VPD_LRDT) { | |
18 | /* Don't return success of the tag isn't complete */ | |
19 | if (i + PCI_VPD_LRDT_TAG_SIZE > len) | |
20 | break; | |
21 | ||
22 | if (val == rdt) | |
23 | return i; | |
24 | ||
25 | i += PCI_VPD_LRDT_TAG_SIZE + | |
26 | pci_vpd_lrdt_size(&buf[i]); | |
27 | } else { | |
28 | u8 tag = val & ~PCI_VPD_SRDT_LEN_MASK; | |
29 | ||
30 | if (tag == rdt) | |
31 | return i; | |
32 | ||
33 | if (tag == PCI_VPD_SRDT_END) | |
34 | break; | |
35 | ||
36 | i += PCI_VPD_SRDT_TAG_SIZE + | |
37 | pci_vpd_srdt_size(&buf[i]); | |
38 | } | |
39 | } | |
40 | ||
41 | return -ENOENT; | |
42 | } | |
43 | EXPORT_SYMBOL_GPL(pci_vpd_find_tag); | |
4067a854 MC |
44 | |
45 | int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off, | |
46 | unsigned int len, const char *kw) | |
47 | { | |
48 | int i; | |
49 | ||
50 | for (i = off; i + PCI_VPD_INFO_FLD_HDR_SIZE <= off + len;) { | |
51 | if (buf[i + 0] == kw[0] && | |
52 | buf[i + 1] == kw[1]) | |
53 | return i; | |
54 | ||
55 | i += PCI_VPD_INFO_FLD_HDR_SIZE + | |
56 | pci_vpd_info_field_size(&buf[i]); | |
57 | } | |
58 | ||
59 | return -ENOENT; | |
60 | } | |
61 | EXPORT_SYMBOL_GPL(pci_vpd_find_info_keyword); |