gsc_command_header_abi.h

 1/* SPDX-License-Identifier: MIT */
 2/*
 3 * Copyright © 2023 Intel Corporation
 4 */
 5
 6#ifndef _ABI_GSC_COMMAND_HEADER_ABI_H
 7#define _ABI_GSC_COMMAND_HEADER_ABI_H
 8
 9#include <linux/types.h>
10
11struct intel_gsc_mtl_header {
12	u32 validity_marker;
13#define GSC_HECI_VALIDITY_MARKER 0xA578875A
14
15	u8 heci_client_id;
16
17	u8 reserved1;
18
19	u16 header_version;
20#define MTL_GSC_HEADER_VERSION 1
21
22	/* FW allows host to decide host_session handle as it sees fit. */
23	u64 host_session_handle;
24
25	/* handle generated by FW for messages that need to be re-submitted */
26	u64 gsc_message_handle;
27
28	u32 message_size; /* lower 20 bits only, upper 12 are reserved */
29
30	/*
31	 * Flags mask:
32	 * Bit 0: Pending
33	 * Bit 1: Session Cleanup;
34	 * Bits 2-15: Flags
35	 * Bits 16-31: Extension Size
36	 * According to internal spec flags are either input or output
37	 * we distinguish the flags using OUTFLAG or INFLAG
38	 */
39	u32 flags;
40#define GSC_OUTFLAG_MSG_PENDING	BIT(0)
41#define GSC_INFLAG_MSG_CLEANUP	BIT(1)
42
43	u32 status;
44} __packed;
45
46#endif