44 строки
771 B
C
44 строки
771 B
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);
|