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pci: Add PCI LRDT tag size and section size

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This patch adds a preprocessor constant to describe the PCI VPD large
resource data type tag size and an inline function to extract the large
resource section size from the large resource data type tag.

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 14:04:39 +00:00
committed by David S. Miller
parent 2ea186ae53
commit a2ce766238
3 changed files with 25 additions and 10 deletions
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14
include/linux/pci.h
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@ -1349,5 +1349,19 @@ static inline bool pci_is_pcie(struct pci_dev *dev)
void pci_request_acs(void);
#define PCI_VPD_LRDT_TAG_SIZE 3
/**
* pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
* @lrdt: Pointer to the beginning of the Large Resource Data Type tag
*
* Returns the extracted Large Resource Data Type length.
*/
static inline u16 pci_vpd_lrdt_size(const u8 *lrdt)
{
return (u16)lrdt[1] + ((u16)lrdt[2] << 8);
}
#endif /* __KERNEL__ */
#endif /* LINUX_PCI_H */