[PATCH v2 08/10] PCI: Add FMT and TYPE definition for TLP header
From: Jacky Chou <jacky_chou@aspeedtech.com>
Date: 2025-07-15 03:43:42
Also in:
linux-aspeed, linux-devicetree, linux-gpio, linux-pci, lkml, openbmc
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
According to PCIe specification, add FMT and TYPE definition for TLP header. And also add macro to combine FMT and TYPE to 1 byte. Signed-off-by: Jacky Chou <jacky_chou@aspeedtech.com> --- include/uapi/linux/pci_regs.h | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+)
diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h
index a3a3e942dedf..700b915e00f5 100644
--- a/include/uapi/linux/pci_regs.h
+++ b/include/uapi/linux/pci_regs.h@@ -1230,4 +1230,36 @@ #define PCI_DVSEC_CXL_PORT_CTL 0x0c #define PCI_DVSEC_CXL_PORT_CTL_UNMASK_SBR 0x00000001 +/* Fmt[2:0] encoding for TLP Header */ +#define PCI_TLP_FMT_3DW_NO_DATA 0x0 // 3DW header, no data +#define PCI_TLP_FMT_4DW_NO_DATA 0x1 // 4DW header, no data +#define PCI_TLP_FMT_3DW_DATA 0x2 // 3DW header, with data +#define PCI_TLP_FMT_4DW_DATA 0x3 // 4DW header, with data +#define PCI_TLP_FMT_PREFIX 0x4 // Prefix header + +/* Type[4:0] encoding for TLP Header */ +#define PCI_TLP_TYPE_MEM_RD 0x00 // Memory Read Request +#define PCI_TLP_TYPE_MEM_RDLK 0x01 // Memory Read Lock Request +#define PCI_TLP_TYPE_MEM_WR 0x00 // Memory Write Request (Fmt must be with data) +#define PCI_TLP_TYPE_IO_RD 0x02 // IO Read Request +#define PCI_TLP_TYPE_IO_WR 0x02 // IO Write Request (Fmt must be with data) +#define PCI_TLP_TYPE_CFG0_RD 0x04 // Config Type 0 Read Request +#define PCI_TLP_TYPE_CFG0_WR 0x04 // Config Type 0 Write Request (Fmt must be with data) +#define PCI_TLP_TYPE_CFG1_RD 0x05 // Config Type 1 Read Request +#define PCI_TLP_TYPE_CFG1_WR 0x05 // Config Type 1 Write Request (Fmt must be with data) +#define PCI_TLP_TYPE_MSG 0x10 // Message Request (see routing field) +#define PCI_TLP_TYPE_MSGD 0x11 // Message Request with Data (see routing field) +#define PCI_TLP_TYPE_CPL 0x0A // Completion without Data +#define PCI_TLP_TYPE_CPLD 0x0A // Completion with Data (Fmt must be with data) +#define PCI_TLP_TYPE_CPLLCK 0x0B // Completion Locked +#define PCI_TLP_TYPE_CPLDLCK 0x0B // Completion with Data Locked (Fmt must be with data) +#define PCI_TLP_TYPE_FETCH_ADD 0x0C // Fetch and Add AtomicOp Request +#define PCI_TLP_TYPE_SWAP 0x0D // Unconditional Swap AtomicOp Request +#define PCI_TLP_TYPE_CMP_SWAP 0x0E // Compare and Swap AtomicOp Request +#define PCI_TLP_TYPE_LOCAL_PREFIX 0x00 // Local TLP Prefix (Fmt = 0x4) +#define PCI_TLP_TYPE_E2E_PREFIX 0x10 // End-to-End TLP Prefix (Fmt = 0x4) + +/* Macro to combine Fmt and Type into the 8-bit field */ +#define PCIE_TLP_FMT_TYPE(fmt, type) (((fmt) << 5) | ((type) & 0x1F)) + #endif /* LINUX_PCI_REGS_H */
--
2.43.0