Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/include/cxl/features.h
26285 views
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
 */

55
struct 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


64
struct cxl_mailbox;

65
struct cxl_memdev;

66
#ifdef CONFIG_CXL_FEATURES

67
struct cxl_features_state *to_cxlfs(struct cxl_dev_state *cxlds);

68
int devm_cxl_setup_features(struct cxl_dev_state *cxlds);

69
int devm_cxl_setup_fwctl(struct device *host, struct cxl_memdev *cxlmd);

70
#else

71
static inline struct cxl_features_state *to_cxlfs(struct cxl_dev_state *cxlds)

72
{

73
	return NULL;

74
}

75


76
static inline int devm_cxl_setup_features(struct cxl_dev_state *cxlds)

77
{

78
	return -EOPNOTSUPP;

79
}

80


81
static inline int devm_cxl_setup_fwctl(struct device *host,

82
				       struct cxl_memdev *cxlmd)

83
{

84
	return -EOPNOTSUPP;

85
}

86
#endif

87


88
#endif

89


90