Add pcie dvsec extended capability id along with helper macros to
retrieve information from the headers.

https://members.pcisig.com/wg/PCI-SIG/document/12335

Signed-off-by: David E. Box <david.e....@linux.intel.com>
---
 include/uapi/linux/pci_regs.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h
index f9701410d3b5..c96f08d1e711 100644
--- a/include/uapi/linux/pci_regs.h
+++ b/include/uapi/linux/pci_regs.h
@@ -720,6 +720,7 @@
 #define PCI_EXT_CAP_ID_DPC     0x1D    /* Downstream Port Containment */
 #define PCI_EXT_CAP_ID_L1SS    0x1E    /* L1 PM Substates */
 #define PCI_EXT_CAP_ID_PTM     0x1F    /* Precision Time Measurement */
+#define PCI_EXT_CAP_ID_DVSEC   0x23    /* Desinated Vendor-Specific */
 #define PCI_EXT_CAP_ID_DLF     0x25    /* Data Link Feature */
 #define PCI_EXT_CAP_ID_PL_16GT 0x26    /* Physical Layer 16.0 GT/s */
 #define PCI_EXT_CAP_ID_MAX     PCI_EXT_CAP_ID_PL_16GT
@@ -1062,6 +1063,10 @@
 #define  PCI_L1SS_CTL1_LTR_L12_TH_SCALE        0xe0000000  /* 
LTR_L1.2_THRESHOLD_Scale */
 #define PCI_L1SS_CTL2          0x0c    /* Control 2 Register */
 
+/* Designated Vendor-Specific (DVSEC, PCI_EXT_CAP_ID_DVSEC) */
+#define PCI_DVSEC_HEADER1              0x4 /* Vendor-Specific Header1 */
+#define PCI_DVSEC_HEADER2              0x8 /* Vendor-Specific Header2 */
+
 /* Data Link Feature */
 #define PCI_DLF_CAP            0x04    /* Capabilities Register */
 #define  PCI_DLF_EXCHANGE_ENABLE       0x80000000  /* Data Link Feature 
Exchange Enable */
-- 
2.20.1

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