features.h

 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 */
44enum 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 */
55struct cxl_features_state {
56	struct cxl_dev_state *cxlds;
57	struct cxl_feat_entries {
58		int num_features;
59		int num_user_features;
60		struct cxl_feat_entry ent[] __counted_by(num_features);
61	} *entries;
62};
63
64struct cxl_mailbox;
65struct cxl_memdev;
66#ifdef CONFIG_CXL_FEATURES
67struct cxl_features_state *to_cxlfs(struct cxl_dev_state *cxlds);
68int devm_cxl_setup_features(struct cxl_dev_state *cxlds);
69int devm_cxl_setup_fwctl(struct device *host, struct cxl_memdev *cxlmd);
70#else
71static inline struct cxl_features_state *to_cxlfs(struct cxl_dev_state *cxlds)
72{
73	return NULL;
74}
75
76static inline int devm_cxl_setup_features(struct cxl_dev_state *cxlds)
77{
78	return -EOPNOTSUPP;
79}
80
81static inline int devm_cxl_setup_fwctl(struct device *host,
82				       struct cxl_memdev *cxlmd)
83{
84	return -EOPNOTSUPP;
85}
86#endif
87
88#endif