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
10int 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}
43EXPORT_SYMBOL_GPL(pci_vpd_find_tag);
44
45int 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}
61EXPORT_SYMBOL_GPL(pci_vpd_find_info_keyword);

 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);