include/uapi/cxl/features.h

Source file repositories/reference/linux-study-clean/include/uapi/cxl/features.h

File Facts

System
Linux kernel
Corpus path
include/uapi/cxl/features.h
Extension
.h
Size
5224 bytes
Lines
180
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

struct cxl_mbox_get_sup_feats_in {
	__le32 count;
	__le16 start_idx;
	__u8 reserved[2];
} __attribute__ ((__packed__));

/* CXL spec r3.2 Table 8-87 command effects */
#define CXL_CMD_CONFIG_CHANGE_COLD_RESET	BIT(0)
#define CXL_CMD_CONFIG_CHANGE_IMMEDIATE		BIT(1)
#define CXL_CMD_DATA_CHANGE_IMMEDIATE		BIT(2)
#define CXL_CMD_POLICY_CHANGE_IMMEDIATE		BIT(3)
#define CXL_CMD_LOG_CHANGE_IMMEDIATE		BIT(4)
#define CXL_CMD_SECURITY_STATE_CHANGE		BIT(5)
#define CXL_CMD_BACKGROUND			BIT(6)
#define CXL_CMD_BGCMD_ABORT_SUPPORTED		BIT(7)
#define CXL_CMD_EFFECTS_VALID			BIT(9)
#define CXL_CMD_CONFIG_CHANGE_CONV_RESET	BIT(10)
#define CXL_CMD_CONFIG_CHANGE_CXL_RESET		BIT(11)
#define CXL_CMD_EFFECTS_RESERVED		GENMASK(15, 12)

/*
 * struct cxl_feat_entry - Supported Feature Entry
 * @uuid: UUID of the Feature
 * @id: id to identify the feature. 0 based
 * @get_feat_size: max bytes required for Get Feature command for this Feature
 * @set_feat_size: max bytes required for Set Feature command for this Feature
 * @flags: attribute flags
 * @get_feat_ver: Get Feature version
 * @set_feat_ver: Set Feature version
 * @effects: Set Feature command effects
 * @reserved: reserved, must be 0
 *
 * CXL spec r3.2 Table 8-109
 * Get Supported Features Supported Feature Entry
 */
struct cxl_feat_entry {
	__uapi_uuid_t uuid;
	__le16 id;
	__le16 get_feat_size;
	__le16 set_feat_size;
	__le32 flags;
	__u8 get_feat_ver;
	__u8 set_feat_ver;
	__le16 effects;
	__u8 reserved[18];
} __attribute__ ((__packed__));

/* @flags field for 'struct cxl_feat_entry' */
#define CXL_FEATURE_F_CHANGEABLE		BIT(0)
#define CXL_FEATURE_F_PERSIST_FW_UPDATE		BIT(4)
#define CXL_FEATURE_F_DEFAULT_SEL		BIT(5)
#define CXL_FEATURE_F_SAVED_SEL			BIT(6)

/*
 * struct cxl_mbox_get_sup_feats_out - Get Supported Features output
 * @num_entries: number of Supported Feature Entries returned
 * @supported_feats: number of supported Features
 * @reserved: reserved, must be 0s.
 * @ents: Supported Feature Entries array
 *
 * CXL spec r3.2 Table 8-108
 * Get supported Features Output Payload
 */
struct cxl_mbox_get_sup_feats_out {
	__struct_group(cxl_mbox_get_sup_feats_out_hdr, hdr, /* no attrs */,
		__le16 num_entries;
		__le16 supported_feats;
		__u8 reserved[4];
	);
	struct cxl_feat_entry ents[] __counted_by_le(num_entries);
} __attribute__ ((__packed__));

/*
 * Get Feature CXL spec r3.2 Spec 8.2.9.6.2
 */

/*
 * struct cxl_mbox_get_feat_in - Get Feature input
 * @uuid: UUID for Feature
 * @offset: offset of the first byte in Feature data for output payload
 * @count: count in bytes of Feature data returned
 * @selection: 0 current value, 1 default value, 2 saved value
 *
 * CXL spec r3.2 section 8.2.9.6.2 Table 8-99
 */
struct cxl_mbox_get_feat_in {
	__uapi_uuid_t uuid;
	__le16 offset;
	__le16 count;
	__u8 selection;

Annotation

Implementation Notes