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[v4,1/5] PCI: Add INTx Mechanism Messages macros

Message ID 20240213-pme_msg-v4-1-e2acd4d7a292@nxp.com (mailing list archive)
State Superseded
Delegated to: Manivannan Sadhasivam
Headers show
Series PCI: dwc: Add common pme_turn_off message by using outbound iATU | expand

Commit Message

Frank Li Feb. 13, 2024, 9:50 p.m. UTC 
From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>

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

The "Message Routing" is in the section 2.2.8, and the "INTx Mechanism
Messages" is in the section 2.2.8.1 on the PCI Express Base Specification,
Rev 6.1.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
 drivers/pci/pci.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
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Patch

diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 2336a8d1edab2..ffd066c15f3bb 100644
--- 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]) See: 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 See: 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;