GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-21 14:21:48 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

pci: Add VPD information field helper functions

Browse source 
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>
This commit is contained in:
Matt Carlson 2010-02-26 14:04:42 +00:00 • committed by David S. Miller
parent b55ac1b226
commit e1d5bdabb9
3 changed files with 23 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

13
include/linux/pci.h
View file

@ -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
@ -1395,6 +1397,17 @@ static inline u8 pci_vpd_srdt_size(const u8 *srdt)
return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
}
/**
* 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