[v20,01/19] PCI: Add INTx Mechanism Messages macros

Commit Message

Yoshihiro Shimoda Aug. 25, 2023, 9:32 a.m. UTC

Add "Message Routing" and "INTx Mechanism Messages" macros to enable
a PCIe driver to send messages for INTx Interrupt Signaling.

The "Message Routing" is from Table 2-17, and the "INTx Mechanism
Messages" is from Table 2-18 on the PCI Express Base Specification,
Rev. 4.0 Version 1.0.

Signed-off-by: Yoshihiro Shimoda <[e-mail]>
Reviewed-by: Serge Semin <[e-mail]>
Reviewed-by: Manivannan Sadhasivam <[e-mail]>
---
 drivers/pci/pci.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

Patch

diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 83778dc1615d..99231fa7dcfc 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -19,6 +19,24 @@ 
  */
 #define PCIE_PME_TO_L2_TIMEOUT_US	10000
 
+/* Message Routing (r[2:0]) */
+#define PCI_MSG_TYPE_R_RC	0
+#define PCI_MSG_TYPE_R_ADDR	1
+#define PCI_MSG_TYPE_R_ID	2
+#define PCI_MSG_TYPE_R_BC	3
+#define PCI_MSG_TYPE_R_LOCAL	4
+#define PCI_MSG_TYPE_R_GATHER	5
+
+/* INTx Mechanism Messages */
+#define PCI_MSG_CODE_ASSERT_INTA	0x20
+#define PCI_MSG_CODE_ASSERT_INTB	0x21
+#define PCI_MSG_CODE_ASSERT_INTC	0x22
+#define PCI_MSG_CODE_ASSERT_INTD	0x23
+#define PCI_MSG_CODE_DEASSERT_INTA	0x24
+#define PCI_MSG_CODE_DEASSERT_INTB	0x25
+#define PCI_MSG_CODE_DEASSERT_INTC	0x26
+#define PCI_MSG_CODE_DEASSERT_INTD	0x27
+
 extern const unsigned char pcie_link_speed[];
 extern bool pci_early_dump;