pci: Add VPD information field helper functions

[net-next-2.6.git] / include / linux / pci.h

diff --git a/include/linux/pci.h b/include/linux/pci.h
index e30ceea7345b02736d7ae2f9105bb4d62ebeed2f..cfff32fc6e350e787c25edf15bd505aabb86d1e5 100644 (file)
--- 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
@@ -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