[net-next-2.6.git] / drivers / pci / vpd.c

/*
 * File:	vpd.c
 * Purpose:	Provide PCI VPD support
 *
 * Copyright (C) 2010 Broadcom Corporation.
 */

#include <linux/pci.h>

int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt)
{
	int i;

	for (i = off; i < len; ) {
		u8 val = buf[i];

		if (val & PCI_VPD_LRDT) {
			/* Don't return success of the tag isn't complete */
			if (i + PCI_VPD_LRDT_TAG_SIZE > len)
				break;

			if (val == rdt)
				return i;

			i += PCI_VPD_LRDT_TAG_SIZE +
			     pci_vpd_lrdt_size(&buf[i]);
		} else {
			u8 tag = val & ~PCI_VPD_SRDT_LEN_MASK;

			if (tag == rdt)
				return i;

			if (tag == PCI_VPD_SRDT_END)
				break;

			i += PCI_VPD_SRDT_TAG_SIZE +
			     pci_vpd_srdt_size(&buf[i]);
		}
	}

	return -ENOENT;
}
EXPORT_SYMBOL_GPL(pci_vpd_find_tag);

int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
			      unsigned int len, const char *kw)
{
	int i;

	for (i = off; i + PCI_VPD_INFO_FLD_HDR_SIZE <= off + len;) {
		if (buf[i + 0] == kw[0] &&
		    buf[i + 1] == kw[1])
			return i;

		i += PCI_VPD_INFO_FLD_HDR_SIZE +
		     pci_vpd_info_field_size(&buf[i]);
	}

	return -ENOENT;
}
EXPORT_SYMBOL_GPL(pci_vpd_find_info_keyword);
Commit	Line	Data
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);