1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* Copyright(c) 2020 Intel Corporation. All rights reserved. */
7 #define CXL_MEMORY_PROGIF 0x10
10 * See section 8.1 Configuration Space Registers in the CXL 2.0
11 * Specification. Names are taken straight from the specification with "CXL" and
12 * "DVSEC" redundancies removed. When obvious, abbreviations may be used.
14 #define PCI_DVSEC_HEADER1_LENGTH_MASK GENMASK(31, 20)
15 #define PCI_DVSEC_VENDOR_ID_CXL 0x1E98
17 /* CXL 2.0 8.1.3: PCIe DVSEC for CXL Device */
18 #define CXL_DVSEC_PCIE_DEVICE 0
20 /* CXL 2.0 8.1.4: Non-CXL Function Map DVSEC */
21 #define CXL_DVSEC_FUNCTION_MAP 2
23 /* CXL 2.0 8.1.5: CXL 2.0 Extensions DVSEC for Ports */
24 #define CXL_DVSEC_PORT_EXTENSIONS 3
26 /* CXL 2.0 8.1.6: GPF DVSEC for CXL Port */
27 #define CXL_DVSEC_PORT_GPF 4
29 /* CXL 2.0 8.1.7: GPF DVSEC for CXL Device */
30 #define CXL_DVSEC_DEVICE_GPF 5
32 /* CXL 2.0 8.1.8: PCIe DVSEC for Flex Bus Port */
33 #define CXL_DVSEC_PCIE_FLEXBUS_PORT 7
35 /* CXL 2.0 8.1.9: Register Locator DVSEC */
36 #define CXL_DVSEC_REG_LOCATOR 8
37 #define CXL_DVSEC_REG_LOCATOR_BLOCK1_OFFSET 0xC
38 #define CXL_DVSEC_REG_LOCATOR_BIR_MASK GENMASK(2, 0)
39 #define CXL_DVSEC_REG_LOCATOR_BLOCK_ID_MASK GENMASK(15, 8)
40 #define CXL_DVSEC_REG_LOCATOR_BLOCK_OFF_LOW_MASK GENMASK(31, 16)
42 /* Register Block Identifier (RBI) */
43 enum cxl_regloc_type {
44 CXL_REGLOC_RBI_EMPTY = 0,
45 CXL_REGLOC_RBI_COMPONENT,
47 CXL_REGLOC_RBI_MEMDEV,
51 static inline resource_size_t cxl_regmap_to_base(struct pci_dev *pdev,
52 struct cxl_register_map *map)
54 if (map->block_offset == U64_MAX)
55 return CXL_RESOURCE_NONE;
57 return pci_resource_start(pdev, map->barno) + map->block_offset;
60 #endif /* __CXL_PCI_H__ */