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pci: Add helper to find a VPD resource data type

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This patch adds the pci_vpd_find_tag() helper function to find VPD
resource data types in a buffer.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matt Carlson 2010-02-26 14:04:41 +00:00 • committed by David S. Miller
parent 7ad506fa1a
commit b55ac1b226
5 changed files with 65 additions and 42 deletions
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12
include/linux/pci.h
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@ -1395,5 +1395,17 @@ static inline u8 pci_vpd_srdt_size(const u8 *srdt)
return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
}
/**
* pci_vpd_find_tag - Locates the Resource Data Type tag provided
* @buf: Pointer to buffered vpd data
* @off: The offset into the buffer at which to begin the search
* @len: The length of the vpd buffer
* @rdt: The Resource Data Type to search for
*
* Returns the index where the Resource Data Type was found or
* -ENOENT otherwise.
*/
int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);
#endif /* __KERNEL__ */
#endif /* LINUX_PCI_H */