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-rw-r--r--src/include/device/pci_def.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/include/device/pci_def.h b/src/include/device/pci_def.h
index 1674ee1e49..60d913204a 100644
--- a/src/include/device/pci_def.h
+++ b/src/include/device/pci_def.h
@@ -373,6 +373,12 @@
#define PCI_EXP_DEVCAP 4 /* Device capabilities */
#define PCI_EXP_DEVCAP_PAYLOAD 0x07 /* Max_Payload_Size */
#define PCI_EXP_DEVCAP_PHANTOM 0x18 /* Phantom functions */
+#define PCI_EXP_DEV_CAP2_OFFSET 0x24 /* Device Capabilities 2 offset */
+/* LTR mechanism supported.Bit 11 of Device Cap 2 Register */
+#define LTR_MECHANISM_SUPPORT (1 << 11)
+#define PCI_EXP_DEV_CTL_STS2_CAP_OFFSET 0x28 /* Device Control 2 offset */
+/* LTR mechanism enable. Bit 10 of Device Control 2 Register */
+#define LTR_MECHANISM_EN (1 << 10)
#define PCI_EXP_DEVCAP_EXT_TAG 0x20 /* Extended tags */
#define PCI_EXP_DEVCAP_L0S 0x1c0 /* L0s Acceptable Latency */
#define PCI_EXP_DEVCAP_L1 0xe00 /* L1 Acceptable Latency */