Add #defines for accessing Vendor ID, Revision, Length, and ID offsets
in the Designated Vendor Specific Extended Capability (DVSEC). Defined
in PCIe r5.0, sec 7.9.6.
Signed-off-by: David E. Box <[email protected]>
Acked-by: Bjorn Helgaas <[email protected]>
---
V2: Unchanged
include/uapi/linux/pci_regs.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h
index e709ae8235e7..57ee51f19283 100644
--- a/include/uapi/linux/pci_regs.h
+++ b/include/uapi/linux/pci_regs.h
@@ -1080,7 +1080,11 @@
/* Designated Vendor-Specific (DVSEC, PCI_EXT_CAP_ID_DVSEC) */
#define PCI_DVSEC_HEADER1 0x4 /* Designated Vendor-Specific Header1 */
+#define PCI_DVSEC_HEADER1_VID(x) ((x) & 0xffff)
+#define PCI_DVSEC_HEADER1_REV(x) (((x) >> 16) & 0xf)
+#define PCI_DVSEC_HEADER1_LEN(x) (((x) >> 20) & 0xfff)
#define PCI_DVSEC_HEADER2 0x8 /* Designated Vendor-Specific Header2 */
+#define PCI_DVSEC_HEADER2_ID(x) ((x) & 0xffff)
/* Data Link Feature */
#define PCI_DLF_CAP 0x04 /* Capabilities Register */
--
2.25.1