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PCI: Update VPD definitions 

The 'end' tag is actually 0x0f; it's the representation as a small resource
data type tag that's 0x78 (i.e., shifted by 3).  Correct PCI_VPD_STIN_END
and PCI_VPD_SRDT_END accordingly.

Also, add helper functions to extract the resource data type tags for both
large and small resource data types.

[bhelgaas: changelog]
Tested-by: Shane Seymour <shane.seymour@hpe.com>
Tested-by: Babu Moger <babu.moger@oracle.com>
Signed-off-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Alexander Duyck <alexander.duyck@gmail.com>
This commit is contained in:
Hannes Reinecke 2016-02-15 09:41:59 +01:00 committed by Bjorn Helgaas
parent 92e963f50f
commit 9eb45d5cc5
1 changed files with 25 additions and 2 deletions
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27
include/linux/pci.h
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@ -1834,12 +1834,13 @@ bool pci_acs_path_enabled(struct pci_dev *start,
#define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
/* Small Resource Data Type Tag Item Names */
#define PCI_VPD_STIN_END 0x78 /* End */
#define PCI_VPD_STIN_END 0x0f /* End */
#define PCI_VPD_SRDT_END PCI_VPD_STIN_END
#define PCI_VPD_SRDT_END (PCI_VPD_STIN_END << 3)
#define PCI_VPD_SRDT_TIN_MASK 0x78
#define PCI_VPD_SRDT_LEN_MASK 0x07
#define PCI_VPD_LRDT_TIN_MASK 0x7f
#define PCI_VPD_LRDT_TAG_SIZE 3
#define PCI_VPD_SRDT_TAG_SIZE 1
@ -1862,6 +1863,17 @@ static inline u16 pci_vpd_lrdt_size(const u8 *lrdt)
return (u16)lrdt[1] + ((u16)lrdt[2] << 8);
}
/**
* pci_vpd_lrdt_tag - Extracts the Large Resource Data Type Tag Item
* @lrdt: Pointer to the beginning of the Large Resource Data Type tag
*
* Returns the extracted Large Resource Data Type Tag item.
*/
static inline u16 pci_vpd_lrdt_tag(const u8 *lrdt)
{
return (u16)(lrdt[0] & PCI_VPD_LRDT_TIN_MASK);
}
/**
* pci_vpd_srdt_size - Extracts the Small Resource Data Type length
* @lrdt: Pointer to the beginning of the Small Resource Data Type tag
@ -1873,6 +1885,17 @@ static inline u8 pci_vpd_srdt_size(const u8 *srdt)
return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
}
/**
* pci_vpd_srdt_tag - Extracts the Small Resource Data Type Tag Item
* @lrdt: Pointer to the beginning of the Small Resource Data Type tag
*
* Returns the extracted Small Resource Data Type Tag Item.
*/
static inline u8 pci_vpd_srdt_tag(const u8 *srdt)
{
return ((*srdt) & PCI_VPD_SRDT_TIN_MASK) >> 3;
}
/**
* pci_vpd_info_field_size - Extracts the information field length
* @lrdt: Pointer to the beginning of an information field header