drivers/misc/mei/mei_lb.c

Source file repositories/reference/linux-study-clean/drivers/misc/mei/mei_lb.c

File Facts

System
Linux kernel
Corpus path
drivers/misc/mei/mei_lb.c
Extension
.c
Size
14599 bytes
Lines
506
Domain
Driver Families
Bucket
drivers/misc
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct mei_lb_req {
	struct mkhi_msg_hdr header;
	__le32 type;
	__le32 flags;
	__le32 reserved[2];
	__le32 payload_size;
	u8 payload[] __counted_by(payload_size);
} __packed;

/**
 * struct mei_lb_rsp - Late Binding response structure
 * @header: MKHI message header (see struct mkhi_msg_hdr)
 * @type: Type of the Late Binding payload
 * @reserved: Reserved for future use by authentication firmware, must be set to 0
 * @status: Status returned by authentication firmware (see &enum intel_lb_status)
 */
struct mei_lb_rsp {
	struct mkhi_msg_hdr header;
	__le32 type;
	__le32 reserved[2];
	__le32 status;
} __packed;

/* Late Binding version 2 */

#define MEI_LB2_CMD 0x01

#define MEI_LB2_HDR_FLAG_RSP 0x01

#define MEI_GUID_LB UUID_LE(0x4ed87243, 0x3980, 0x4d8e, \
			    0xb1, 0xf9, 0x6f, 0xb7, 0xc0, 0x14, 0x8c, 0x4d)

/**
 * struct mei_lb2_header - Late Binding2 header
 * @command_id:
 * @flags: Flags for transport layer (e.g. MEI_LB2_HDR_FLAG_RSP)
 * @reserved: Reserved for future use by authentication firmware, must be set to 0
 */
struct mei_lb2_header {
	__le32 command_id;
	u8 flags;
	u8 reserved[3];
};

/**
 * struct mei_lb2_rsp_header - Late Binding2 response header
 * @header: Common command header
 * @status: Status returned by authentication firmware (see &enum intel_lb_status)
 */
struct mei_lb2_rsp_header {
	struct mei_lb2_header header;
	__le32 status;
};

#define MEI_LB2_FLAG_FST_CHUNK 0x02
#define MEI_LB2_FLAG_LST_CHUNK 0x04

/**
 * struct mei_lb2_req - Late Binding2 request
 * @header: Common command header
 * @type: Type of the Late Binding payload (see &enum intel_lb_type)
 * @flags: Flags to be passed to the authentication firmware (MEI_LB2_FLAG_*)
 * @reserved: Reserved for future use by authentication firmware, must be set to 0
 * @total_payload_size: Size of whole Late Binding package in bytes
 * @payload_size: Size of the payload chunk in bytes
 * @payload: Data chunk to be sent to the authentication firmware
 */
struct mei_lb2_req {
	struct mei_lb2_header header;
	__le32 type;
	__le32 flags;
	__le32 reserved;
	__le32 total_payload_size;
	__le32 payload_size;
	u8 payload[] __counted_by(payload_size);
};

/**
 * struct mei_lb2_rsp - Late Binding2 response
 * @rheader: Common response header
 * @type: Type of the Late Binding payload (see &enum intel_lb_type)
 * @reserved: Reserved for future use by authentication firmware, must be set to 0
 */
struct mei_lb2_rsp {
	struct mei_lb2_rsp_header rheader;
	__le32 type;
	__le32 reserved[2];
};

static bool mei_lb_check_response_v1(const struct device *dev, ssize_t bytes,

Annotation

Implementation Notes