From: Terry Bowman Date: Wed, 14 Jan 2026 18:20:22 +0000 (-0600) Subject: PCI: Move CXL DVSEC definitions into uapi/linux/pci_regs.h X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0f7afd80d81b739c4a9a6e4e24109ba1030c9c56;p=thirdparty%2Fkernel%2Flinux.git PCI: Move CXL DVSEC definitions into uapi/linux/pci_regs.h The CXL DVSECs are currently defined in cxl/core/cxlpci.h. These are not accessible to other subsystems. Move these to uapi/linux/pci_regs.h. The CXL DVSEC definitions will be renamed and reformatted to fit better with existing defines. Signed-off-by: Terry Bowman Reviewed-by: Dave Jiang Reviewed-by: Jonathan Cameron Reviewed-by: Dan Williams Signed-off-by: Dan Williams Acked-by: Bjorn Helgaas Link: https://patch.msgid.link/20260114182055.46029-2-terry.bowman@amd.com Signed-off-by: Dave Jiang --- diff --git a/drivers/cxl/cxlpci.h b/drivers/cxl/cxlpci.h index 1d526bea84312..cdb7cf3dbcb43 100644 --- a/drivers/cxl/cxlpci.h +++ b/drivers/cxl/cxlpci.h @@ -7,59 +7,6 @@ #define CXL_MEMORY_PROGIF 0x10 -/* - * See section 8.1 Configuration Space Registers in the CXL 2.0 - * Specification. Names are taken straight from the specification with "CXL" and - * "DVSEC" redundancies removed. When obvious, abbreviations may be used. - */ -#define PCI_DVSEC_HEADER1_LENGTH_MASK GENMASK(31, 20) - -/* CXL 2.0 8.1.3: PCIe DVSEC for CXL Device */ -#define CXL_DVSEC_PCIE_DEVICE 0 -#define CXL_DVSEC_CAP_OFFSET 0xA -#define CXL_DVSEC_MEM_CAPABLE BIT(2) -#define CXL_DVSEC_HDM_COUNT_MASK GENMASK(5, 4) -#define CXL_DVSEC_CTRL_OFFSET 0xC -#define CXL_DVSEC_MEM_ENABLE BIT(2) -#define CXL_DVSEC_RANGE_SIZE_HIGH(i) (0x18 + (i * 0x10)) -#define CXL_DVSEC_RANGE_SIZE_LOW(i) (0x1C + (i * 0x10)) -#define CXL_DVSEC_MEM_INFO_VALID BIT(0) -#define CXL_DVSEC_MEM_ACTIVE BIT(1) -#define CXL_DVSEC_MEM_SIZE_LOW_MASK GENMASK(31, 28) -#define CXL_DVSEC_RANGE_BASE_HIGH(i) (0x20 + (i * 0x10)) -#define CXL_DVSEC_RANGE_BASE_LOW(i) (0x24 + (i * 0x10)) -#define CXL_DVSEC_MEM_BASE_LOW_MASK GENMASK(31, 28) - -#define CXL_DVSEC_RANGE_MAX 2 - -/* CXL 2.0 8.1.4: Non-CXL Function Map DVSEC */ -#define CXL_DVSEC_FUNCTION_MAP 2 - -/* CXL 2.0 8.1.5: CXL 2.0 Extensions DVSEC for Ports */ -#define CXL_DVSEC_PORT_EXTENSIONS 3 - -/* CXL 2.0 8.1.6: GPF DVSEC for CXL Port */ -#define CXL_DVSEC_PORT_GPF 4 -#define CXL_DVSEC_PORT_GPF_PHASE_1_CONTROL_OFFSET 0x0C -#define CXL_DVSEC_PORT_GPF_PHASE_1_TMO_BASE_MASK GENMASK(3, 0) -#define CXL_DVSEC_PORT_GPF_PHASE_1_TMO_SCALE_MASK GENMASK(11, 8) -#define CXL_DVSEC_PORT_GPF_PHASE_2_CONTROL_OFFSET 0xE -#define CXL_DVSEC_PORT_GPF_PHASE_2_TMO_BASE_MASK GENMASK(3, 0) -#define CXL_DVSEC_PORT_GPF_PHASE_2_TMO_SCALE_MASK GENMASK(11, 8) - -/* CXL 2.0 8.1.7: GPF DVSEC for CXL Device */ -#define CXL_DVSEC_DEVICE_GPF 5 - -/* CXL 2.0 8.1.8: PCIe DVSEC for Flex Bus Port */ -#define CXL_DVSEC_PCIE_FLEXBUS_PORT 7 - -/* CXL 2.0 8.1.9: Register Locator DVSEC */ -#define CXL_DVSEC_REG_LOCATOR 8 -#define CXL_DVSEC_REG_LOCATOR_BLOCK1_OFFSET 0xC -#define CXL_DVSEC_REG_LOCATOR_BIR_MASK GENMASK(2, 0) -#define CXL_DVSEC_REG_LOCATOR_BLOCK_ID_MASK GENMASK(15, 8) -#define CXL_DVSEC_REG_LOCATOR_BLOCK_OFF_LOW_MASK GENMASK(31, 16) - /* * NOTE: Currently all the functions which are enabled for CXL require their * vectors to be in the first 16. Use this as the default max. diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h index 3add74ae25948..6c4b6f19b18e3 100644 --- a/include/uapi/linux/pci_regs.h +++ b/include/uapi/linux/pci_regs.h @@ -1253,11 +1253,6 @@ #define PCI_DEV3_STA 0x0c /* Device 3 Status Register */ #define PCI_DEV3_STA_SEGMENT 0x8 /* Segment Captured (end-to-end flit-mode detected) */ -/* Compute Express Link (CXL r3.1, sec 8.1.5) */ -#define PCI_DVSEC_CXL_PORT 3 -#define PCI_DVSEC_CXL_PORT_CTL 0x0c -#define PCI_DVSEC_CXL_PORT_CTL_UNMASK_SBR 0x00000001 - /* Integrity and Data Encryption Extended Capability */ #define PCI_IDE_CAP 0x04 #define PCI_IDE_CAP_LINK 0x1 /* Link IDE Stream Supported */ @@ -1338,4 +1333,63 @@ #define PCI_IDE_SEL_ADDR_3(x) (28 + (x) * PCI_IDE_SEL_ADDR_BLOCK_SIZE) #define PCI_IDE_SEL_BLOCK_SIZE(nr_assoc) (20 + PCI_IDE_SEL_ADDR_BLOCK_SIZE * (nr_assoc)) +/* Compute Express Link (CXL r3.1, sec 8.1.5) */ +#define PCI_DVSEC_CXL_PORT 3 +#define PCI_DVSEC_CXL_PORT_CTL 0x0c +#define PCI_DVSEC_CXL_PORT_CTL_UNMASK_SBR 0x00000001 + +/* + * Compute Express Link (CXL r3.2, sec 8.1) + * + * Note that CXL DVSEC id 3 and 7 to be ignored when the CXL link state + * is "disconnected" (CXL r3.2, sec 9.12.3). Re-enumerate these + * registers on downstream link-up events. + */ +#define PCI_DVSEC_HEADER1_LENGTH_MASK __GENMASK(31, 20) + +/* CXL 3.2 8.1.3: PCIe DVSEC for CXL Device */ +#define CXL_DVSEC_PCIE_DEVICE 0 +#define CXL_DVSEC_CAP_OFFSET 0xA +#define CXL_DVSEC_MEM_CAPABLE _BITUL(2) +#define CXL_DVSEC_HDM_COUNT_MASK __GENMASK(5, 4) +#define CXL_DVSEC_CTRL_OFFSET 0xC +#define CXL_DVSEC_MEM_ENABLE _BITUL(2) +#define CXL_DVSEC_RANGE_SIZE_HIGH(i) (0x18 + (i * 0x10)) +#define CXL_DVSEC_RANGE_SIZE_LOW(i) (0x1C + (i * 0x10)) +#define CXL_DVSEC_MEM_INFO_VALID _BITUL(0) +#define CXL_DVSEC_MEM_ACTIVE _BITUL(1) +#define CXL_DVSEC_MEM_SIZE_LOW_MASK __GENMASK(31, 28) +#define CXL_DVSEC_RANGE_BASE_HIGH(i) (0x20 + (i * 0x10)) +#define CXL_DVSEC_RANGE_BASE_LOW(i) (0x24 + (i * 0x10)) +#define CXL_DVSEC_MEM_BASE_LOW_MASK __GENMASK(31, 28) + +#define CXL_DVSEC_RANGE_MAX 2 + +/* CXL 3.2 8.1.4: Non-CXL Function Map DVSEC */ +#define CXL_DVSEC_FUNCTION_MAP 2 + +/* CXL 3.2 8.1.5: Extensions DVSEC for Ports */ +#define CXL_DVSEC_PORT 3 +#define CXL_DVSEC_PORT_CTL 0x0c +#define CXL_DVSEC_PORT_CTL_UNMASK_SBR 0x00000001 + +/* CXL 3.2 8.1.6: GPF DVSEC for CXL Port */ +#define CXL_DVSEC_PORT_GPF 4 +#define CXL_DVSEC_PORT_GPF_PHASE_1_CONTROL_OFFSET 0x0C +#define CXL_DVSEC_PORT_GPF_PHASE_1_TMO_BASE_MASK __GENMASK(3, 0) +#define CXL_DVSEC_PORT_GPF_PHASE_1_TMO_SCALE_MASK __GENMASK(11, 8) +#define CXL_DVSEC_PORT_GPF_PHASE_2_CONTROL_OFFSET 0xE +#define CXL_DVSEC_PORT_GPF_PHASE_2_TMO_BASE_MASK __GENMASK(3, 0) +#define CXL_DVSEC_PORT_GPF_PHASE_2_TMO_SCALE_MASK __GENMASK(11, 8) + +/* CXL 3.2 8.1.7: GPF DVSEC for CXL Device */ +#define CXL_DVSEC_DEVICE_GPF 5 + +/* CXL 3.2 8.1.9: Register Locator DVSEC */ +#define CXL_DVSEC_REG_LOCATOR 8 +#define CXL_DVSEC_REG_LOCATOR_BLOCK1_OFFSET 0xC +#define CXL_DVSEC_REG_LOCATOR_BIR_MASK __GENMASK(2, 0) +#define CXL_DVSEC_REG_LOCATOR_BLOCK_ID_MASK __GENMASK(15, 8) +#define CXL_DVSEC_REG_LOCATOR_BLOCK_OFF_LOW_MASK __GENMASK(31, 16) + #endif /* LINUX_PCI_REGS_H */