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| author | Matt Carlson <mcarlson@broadcom.com> | 2010-02-26 14:04:42 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-28 00:43:32 -0800 |
| commit | e1d5bdabb94da89bdb3c3f2ee105cf61fca88ec8 (patch) | |
| tree | bc5b86b19bc49ace2df10ed9e7ba7d1ca2b74d33 /include | |
| parent | b55ac1b22690d2e5b02a61cf6d69c2d66969c79d (diff) | |
| download | lwn-e1d5bdabb94da89bdb3c3f2ee105cf61fca88ec8.tar.gz lwn-e1d5bdabb94da89bdb3c3f2ee105cf61fca88ec8.zip | |
pci: Add VPD information field helper functions
This patch adds a preprocessor constant to describe the PCI VPD
information field header size and an inline function to extract the
size of the information field itself.
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/pci.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h index e30ceea7345b..cfff32fc6e35 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1373,6 +1373,8 @@ void pci_request_acs(void); #define PCI_VPD_LRDT_TAG_SIZE 3 #define PCI_VPD_SRDT_TAG_SIZE 1 +#define PCI_VPD_INFO_FLD_HDR_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 @@ -1396,6 +1398,17 @@ static inline u8 pci_vpd_srdt_size(const u8 *srdt) } /** + * pci_vpd_info_field_size - Extracts the information field length + * @lrdt: Pointer to the beginning of an information field header + * + * Returns the extracted information field length. + */ +static inline u8 pci_vpd_info_field_size(const u8 *info_field) +{ + return info_field[2]; +} + +/** * 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 |