1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* Copyright(c) 2024-2025 Intel Corporation. */ 3 #ifndef __CXL_FEATURES_H__ 4 #define __CXL_FEATURES_H__ 5 6 #include <linux/uuid.h> 7 #include <linux/fwctl.h> 8 #include <uapi/cxl/features.h> 9 10 /* Feature UUIDs used by the kernel */ 11 #define CXL_FEAT_PATROL_SCRUB_UUID \ 12 UUID_INIT(0x96dad7d6, 0xfde8, 0x482b, 0xa7, 0x33, 0x75, 0x77, 0x4e, \ 13 0x06, 0xdb, 0x8a) 14 15 #define CXL_FEAT_ECS_UUID \ 16 UUID_INIT(0xe5b13f22, 0x2328, 0x4a14, 0xb8, 0xba, 0xb9, 0x69, 0x1e, \ 17 0x89, 0x33, 0x86) 18 19 #define CXL_FEAT_SPPR_UUID \ 20 UUID_INIT(0x892ba475, 0xfad8, 0x474e, 0x9d, 0x3e, 0x69, 0x2c, 0x91, \ 21 0x75, 0x68, 0xbb) 22 23 #define CXL_FEAT_HPPR_UUID \ 24 UUID_INIT(0x80ea4521, 0x786f, 0x4127, 0xaf, 0xb1, 0xec, 0x74, 0x59, \ 25 0xfb, 0x0e, 0x24) 26 27 #define CXL_FEAT_CACHELINE_SPARING_UUID \ 28 UUID_INIT(0x96C33386, 0x91dd, 0x44c7, 0x9e, 0xcb, 0xfd, 0xaf, 0x65, \ 29 0x03, 0xba, 0xc4) 30 31 #define CXL_FEAT_ROW_SPARING_UUID \ 32 UUID_INIT(0x450ebf67, 0xb135, 0x4f97, 0xa4, 0x98, 0xc2, 0xd5, 0x7f, \ 33 0x27, 0x9b, 0xed) 34 35 #define CXL_FEAT_BANK_SPARING_UUID \ 36 UUID_INIT(0x78b79636, 0x90ac, 0x4b64, 0xa4, 0xef, 0xfa, 0xac, 0x5d, \ 37 0x18, 0xa8, 0x63) 38 39 #define CXL_FEAT_RANK_SPARING_UUID \ 40 UUID_INIT(0x34dbaff5, 0x0552, 0x4281, 0x8f, 0x76, 0xda, 0x0b, 0x5e, \ 41 0x7a, 0x76, 0xa7) 42 43 /* Feature commands capability supported by a device */ 44 enum cxl_features_capability { 45 CXL_FEATURES_NONE = 0, 46 CXL_FEATURES_RO, 47 CXL_FEATURES_RW, 48 }; 49 50 /** 51 * struct cxl_features_state - The Features state for the device 52 * @cxlds: Pointer to CXL device state 53 * @entries: CXl feature entry context 54 * @num_features: total Features supported by the device 55 * @ent: Flex array of Feature detail entries from the device 56 */ 57 struct cxl_features_state { 58 struct cxl_dev_state *cxlds; 59 struct cxl_feat_entries { 60 int num_features; 61 int num_user_features; 62 struct cxl_feat_entry ent[] __counted_by(num_features); 63 } *entries; 64 }; 65 66 struct cxl_mailbox; 67 struct cxl_memdev; 68 #ifdef CONFIG_CXL_FEATURES 69 inline struct cxl_features_state *to_cxlfs(struct cxl_dev_state *cxlds); 70 int devm_cxl_setup_features(struct cxl_dev_state *cxlds); 71 int devm_cxl_setup_fwctl(struct cxl_memdev *cxlmd); 72 #else 73 static inline struct cxl_features_state *to_cxlfs(struct cxl_dev_state *cxlds) 74 { 75 return NULL; 76 } 77 78 static inline int devm_cxl_setup_features(struct cxl_dev_state *cxlds) 79 { 80 return -EOPNOTSUPP; 81 } 82 83 static inline int devm_cxl_setup_fwctl(struct cxl_memdev *cxlmd) 84 { 85 return -EOPNOTSUPP; 86 } 87 #endif 88 89 #endif 90