| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* Copyright(c) 2020 Intel Corporation. All rights reserved. */ |
| #ifndef __CXL_PCI_H__ |
| #define __CXL_PCI_H__ |
| #include <linux/pci.h> |
| #include "cxl.h" |
| |
| #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) |
| #define PCI_DVSEC_VENDOR_ID_CXL 0x1E98 |
| |
| /* 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) |
| |
| /* 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 |
| |
| /* 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) |
| |
| /* Register Block Identifier (RBI) */ |
| enum cxl_regloc_type { |
| CXL_REGLOC_RBI_EMPTY = 0, |
| CXL_REGLOC_RBI_COMPONENT, |
| CXL_REGLOC_RBI_VIRT, |
| CXL_REGLOC_RBI_MEMDEV, |
| CXL_REGLOC_RBI_TYPES |
| }; |
| |
| static inline resource_size_t cxl_regmap_to_base(struct pci_dev *pdev, |
| struct cxl_register_map *map) |
| { |
| if (map->block_offset == U64_MAX) |
| return CXL_RESOURCE_NONE; |
| |
| return pci_resource_start(pdev, map->barno) + map->block_offset; |
| } |
| |
| int devm_cxl_port_enumerate_dports(struct cxl_port *port); |
| struct cxl_dev_state; |
| int cxl_hdm_decode_init(struct cxl_dev_state *cxlds, struct cxl_hdm *cxlhdm); |
| #endif /* __CXL_PCI_H__ */ |
