linux-kernel - [PATCH v3 08/10] PCI: Add FMT and TYPE definition for TLP header

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Message-ID: <20250901055922.1553550-9-jacky_chou@aspeedtech.com>
Date: Mon, 1 Sep 2025 13:59:20 +0800
From: Jacky Chou <jacky_chou@...eedtech.com>
To: <linux-pci@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <bhelgaas@...gle.com>,
	<lpieralisi@...nel.org>, <kwilczynski@...nel.org>, <mani@...nel.org>,
	<robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
	<joel@....id.au>, <andrew@...econstruct.com.au>, <vkoul@...nel.org>,
	<kishon@...nel.org>, <linus.walleij@...aro.org>, <p.zabel@...gutronix.de>,
	<linux-aspeed@...ts.ozlabs.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-phy@...ts.infradead.org>, <openbmc@...ts.ozlabs.org>,
	<linux-gpio@...r.kernel.org>
CC: <jacky_chou@...eedtech.com>
Subject: [PATCH v3 08/10] PCI: Add FMT and TYPE definition for TLP header

According to PCIe specification, add FMT and TYPE definition
for TLP header.

Signed-off-by: Jacky Chou <jacky_chou@...eedtech.com>
---
 drivers/pci/pci.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 34f65d69662e..45d47d6c4f53 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -81,6 +81,18 @@ struct pcie_tlp_log;
 #define PCIE_MSG_CODE_DEASSERT_INTC	0x26
 #define PCIE_MSG_CODE_DEASSERT_INTD	0x27
 
+/* Format of TLP; PCIe r5.0, sec 2.2.1 */
+#define PCIE_TLP_FMT_3DW_NO_DATA	0x00 /* 3DW header, no data */
+#define PCIE_TLP_FMT_4DW_NO_DATA	0x01 /* 4DW header, no data */
+#define PCIE_TLP_FMT_3DW_DATA		0x02 /* 3DW header, with data */
+#define PCIE_TLP_FMT_4DW_DATA		0x03 /* 4DW header, with data */
+
+/* Type of TLP; PCIe r5.0, sec 2.2.1 */
+#define PCIE_TLP_TYPE_CFG0_RD		0x04 /* Config Type 0 Read Request */
+#define PCIE_TLP_TYPE_CFG0_WR		0x04 /* Config Type 0 Write Request */
+#define PCIE_TLP_TYPE_CFG1_RD		0x05 /* Config Type 1 Read Request */
+#define PCIE_TLP_TYPE_CFG1_WR		0x05 /* Config Type 1 Write Request */
+
 extern const unsigned char pcie_link_speed[];
 extern bool pci_early_dump;
 
-- 
2.43.0