/* * QEMU CXL PCI interfaces * * Copyright (c) 2020 Intel * * This work is licensed under the terms of the GNU GPL, version 2. See the * COPYING file in the top-level directory. */ #ifndef CXL_PCI_H #define CXL_PCI_H #include "qemu/compiler.h" #include "hw/pci/pci.h" #include "hw/pci/pcie.h" #define CXL_VENDOR_ID 0x1e98 #define PCIE_DVSEC_HEADER1_OFFSET 0x4 /* Offset from start of extend cap */ #define PCIE_DVSEC_ID_OFFSET 0x8 #define PCIE_CXL_DEVICE_DVSEC_LENGTH 0x38 #define PCIE_CXL1_DEVICE_DVSEC_REVID 0 #define PCIE_CXL2_DEVICE_DVSEC_REVID 1 #define EXTENSIONS_PORT_DVSEC_LENGTH 0x28 #define EXTENSIONS_PORT_DVSEC_REVID 0 #define GPF_PORT_DVSEC_LENGTH 0x10 #define GPF_PORT_DVSEC_REVID 0 #define GPF_DEVICE_DVSEC_LENGTH 0x10 #define GPF_DEVICE_DVSEC_REVID 0 #define PCIE_FLEXBUS_PORT_DVSEC_LENGTH_2_0 0x14 #define PCIE_FLEXBUS_PORT_DVSEC_REVID_2_0 1 #define REG_LOC_DVSEC_LENGTH 0x24 #define REG_LOC_DVSEC_REVID 0 enum { PCIE_CXL_DEVICE_DVSEC = 0, NON_CXL_FUNCTION_MAP_DVSEC = 2, EXTENSIONS_PORT_DVSEC = 3, GPF_PORT_DVSEC = 4, GPF_DEVICE_DVSEC = 5, PCIE_FLEXBUS_PORT_DVSEC = 7, REG_LOC_DVSEC = 8, MLD_DVSEC = 9, CXL20_MAX_DVSEC }; typedef struct DVSECHeader { uint32_t cap_hdr; uint32_t dv_hdr1; uint16_t dv_hdr2; } QEMU_PACKED DVSECHeader; QEMU_BUILD_BUG_ON(sizeof(DVSECHeader) != 10); /* * CXL 2.0 devices must implement certain DVSEC IDs, and can [optionally] * implement others. * * CXL 2.0 Device: 0, [2], 5, 8 * CXL 2.0 RP: 3, 4, 7, 8 * CXL 2.0 Upstream Port: [2], 7, 8 * CXL 2.0 Downstream Port: 3, 4, 7, 8 */ /* CXL 2.0 - 8.1.5 (ID 0003) */ typedef struct CXLDVSECPortExtensions { DVSECHeader hdr; uint16_t status; uint16_t control; uint8_t alt_bus_base; uint8_t alt_bus_limit; uint16_t alt_memory_base; uint16_t alt_memory_limit; uint16_t alt_prefetch_base; uint16_t alt_prefetch_limit; uint32_t alt_prefetch_base_high; uint32_t alt_prefetch_limit_high; uint32_t rcrb_base; uint32_t rcrb_base_high; } CXLDVSECPortExtensions; QEMU_BUILD_BUG_ON(sizeof(CXLDVSECPortExtensions) != 0x28); #define PORT_CONTROL_OFFSET 0xc #define PORT_CONTROL_UNMASK_SBR 1 #define PORT_CONTROL_ALT_MEMID_EN 4 /* CXL 2.0 - 8.1.6 GPF DVSEC (ID 0004) */ typedef struct CXLDVSECPortGPF { DVSECHeader hdr; uint16_t rsvd; uint16_t phase1_ctrl; uint16_t phase2_ctrl; } CXLDVSECPortGPF; QEMU_BUILD_BUG_ON(sizeof(CXLDVSECPortGPF) != 0x10); /* CXL 2.0 - 8.1.7 GPF DVSEC for CXL Device */ typedef struct CXLDVSECDeviceGPF { DVSECHeader hdr; uint16_t phase2_duration; uint32_t phase2_power; } CXLDVSECDeviceGPF; QEMU_BUILD_BUG_ON(sizeof(CXLDVSECDeviceGPF) != 0x10); /* CXL 2.0 - 8.1.8/8.2.1.3 Flex Bus DVSEC (ID 0007) */ typedef struct CXLDVSECPortFlexBus { DVSECHeader hdr; uint16_t cap; uint16_t ctrl; uint16_t status; uint32_t rcvd_mod_ts_data_phase1; } CXLDVSECPortFlexBus; QEMU_BUILD_BUG_ON(sizeof(CXLDVSECPortFlexBus) != 0x14); /* CXL 2.0 - 8.1.9 Register Locator DVSEC (ID 0008) */ typedef struct CXLDVSECRegisterLocator { DVSECHeader hdr; uint16_t rsvd; uint32_t reg0_base_lo; uint32_t reg0_base_hi; uint32_t reg1_base_lo; uint32_t reg1_base_hi; uint32_t reg2_base_lo; uint32_t reg2_base_hi; } CXLDVSECRegisterLocator; QEMU_BUILD_BUG_ON(sizeof(CXLDVSECRegisterLocator) != 0x24); /* BAR Equivalence Indicator */ #define BEI_BAR_10H 0 #define BEI_BAR_14H 1 #define BEI_BAR_18H 2 #define BEI_BAR_1cH 3 #define BEI_BAR_20H 4 #define BEI_BAR_24H 5 /* Register Block Identifier */ #define RBI_EMPTY 0 #define RBI_COMPONENT_REG (1 << 8) #define RBI_BAR_VIRT_ACL (2 << 8) #define RBI_CXL_DEVICE_REG (3 << 8) #endif