tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: MIT */
2/*
3 * Copyright © 2023 Intel Corporation
4 */
5
6#ifndef _ABI_GSC_PXP_COMMANDS_ABI_H
7#define _ABI_GSC_PXP_COMMANDS_ABI_H
8
9#include <linux/sizes.h>
10#include <linux/types.h>
11
12/* Heci client ID for PXP commands */
13#define HECI_MEADDRESS_PXP 17
14
15#define PXP_APIVER(x, y) (((x) & 0xFFFF) << 16 | ((y) & 0xFFFF))
16
17/*
18 * A PXP sub-section in an HECI packet can be up to 64K big in each direction.
19 * This does not include the top-level GSC header.
20 */
21#define PXP_MAX_PACKET_SIZE SZ_64K
22
23/*
24 * there are a lot of status codes for PXP, but we only define the cross-API
25 * common ones that we actually can handle in the kernel driver. Other failure
26 * codes should be printed to error msg for debug.
27 */
28enum pxp_status {
29 PXP_STATUS_SUCCESS = 0x0,
30 PXP_STATUS_ERROR_API_VERSION = 0x1002,
31 PXP_STATUS_NOT_READY = 0x100e,
32 PXP_STATUS_PLATFCONFIG_KF1_NOVERIF = 0x101a,
33 PXP_STATUS_PLATFCONFIG_KF1_BAD = 0x101f,
34 PXP_STATUS_PLATFCONFIG_FIXED_KF1_NOT_SUPPORTED = 0x1037,
35 PXP_STATUS_OP_NOT_PERMITTED = 0x4013
36};
37
38/* Common PXP FW message header */
39struct pxp_cmd_header {
40 u32 api_version;
41 u32 command_id;
42 union {
43 u32 status; /* out */
44 u32 stream_id; /* in */
45#define PXP_CMDHDR_EXTDATA_SESSION_VALID GENMASK(0, 0)
46#define PXP_CMDHDR_EXTDATA_APP_TYPE GENMASK(1, 1)
47#define PXP_CMDHDR_EXTDATA_SESSION_ID GENMASK(17, 2)
48 };
49 /* Length of the message (excluding the header) */
50 u32 buffer_len;
51} __packed;
52
53#define PXP43_CMDID_INVALIDATE_STREAM_KEY 0x00000007
54#define PXP43_CMDID_INIT_SESSION 0x00000036
55#define PXP43_CMDID_NEW_HUC_AUTH 0x0000003F /* MTL+ */
56
57/* PXP-Input-Packet: HUC Auth-only */
58struct pxp43_new_huc_auth_in {
59 struct pxp_cmd_header header;
60 u64 huc_base_address;
61 u32 huc_size;
62} __packed;
63
64/* PXP-Output-Packet: HUC Load and Authentication or Auth-only */
65struct pxp43_huc_auth_out {
66 struct pxp_cmd_header header;
67} __packed;
68
69/* PXP-Input-Packet: Init PXP session */
70struct pxp43_create_arb_in {
71 struct pxp_cmd_header header;
72 /* header.stream_id fields for vesion 4.3 of Init PXP session: */
73 #define PXP43_INIT_SESSION_VALID BIT(0)
74 #define PXP43_INIT_SESSION_APPTYPE BIT(1)
75 #define PXP43_INIT_SESSION_APPID GENMASK(17, 2)
76 u32 protection_mode;
77 #define PXP43_INIT_SESSION_PROTECTION_ARB 0x2
78 u32 sub_session_id;
79 u32 init_flags;
80 u32 rsvd[12];
81} __packed;
82
83/* PXP-Input-Packet: Init PXP session */
84struct pxp43_create_arb_out {
85 struct pxp_cmd_header header;
86 u32 rsvd[8];
87} __packed;
88
89/* PXP-Input-Packet: Invalidate Stream Key */
90struct pxp43_inv_stream_key_in {
91 struct pxp_cmd_header header;
92 u32 rsvd[3];
93} __packed;
94
95/* PXP-Output-Packet: Invalidate Stream Key */
96struct pxp43_inv_stream_key_out {
97 struct pxp_cmd_header header;
98 u32 rsvd;
99} __packed;
100#endif