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