PCI: Add PCIE_MSG_CODE_ASSERT_INTx message macros

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

Values from PCIe r6.1, sec 2.2.8 and 2.2.8.1.

Link: https://lore.kernel.org/linux-pci/20240418-pme_msg-v8-1-a54265c39742@nxp.com
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>

diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index fd44565c47562868bacdad9b1bb2e017cae09795..95c95d981241cac353e91b31a120965b8e03dea8 100644 (file)
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -22,6 +22,24 @@
  */
 #define PCIE_PME_TO_L2_TIMEOUT_US      10000
 
+/* Message Routing (r[2:0]); PCIe r6.0, sec 2.2.8 */
+#define PCIE_MSG_TYPE_R_RC     0
+#define PCIE_MSG_TYPE_R_ADDR   1
+#define PCIE_MSG_TYPE_R_ID     2
+#define PCIE_MSG_TYPE_R_BC     3
+#define PCIE_MSG_TYPE_R_LOCAL  4
+#define PCIE_MSG_TYPE_R_GATHER 5
+
+/* INTx Mechanism Messages; PCIe r6.0, sec 2.2.8.1 */
+#define PCIE_MSG_CODE_ASSERT_INTA      0x20
+#define PCIE_MSG_CODE_ASSERT_INTB      0x21
+#define PCIE_MSG_CODE_ASSERT_INTC      0x22
+#define PCIE_MSG_CODE_ASSERT_INTD      0x23
+#define PCIE_MSG_CODE_DEASSERT_INTA    0x24
+#define PCIE_MSG_CODE_DEASSERT_INTB    0x25
+#define PCIE_MSG_CODE_DEASSERT_INTC    0x26
+#define PCIE_MSG_CODE_DEASSERT_INTD    0x27
+
 extern const unsigned char pcie_link_speed[];
 extern bool pci_early_dump;