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1/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
2/*
3 * Userspace interface for AMD Seamless Firmware Servicing (SFS)
4 *
5 * Copyright (C) 2025 Advanced Micro Devices, Inc.
6 *
7 * Author: Ashish Kalra <ashish.kalra@amd.com>
8 */
9
10#ifndef __PSP_SFS_USER_H__
11#define __PSP_SFS_USER_H__
12
13#include <linux/types.h>
14
15/**
16 * SFS: AMD Seamless Firmware Support (SFS) interface
17 */
18
19#define PAYLOAD_NAME_SIZE 64
20#define TEE_EXT_CMD_BUFFER_SIZE 4096
21
22/**
23 * struct sfs_user_get_fw_versions - get current level of base firmware (output).
24 * @blob: current level of base firmware for ASP and patch levels (input/output).
25 * @sfs_status: 32-bit SFS status value (output).
26 * @sfs_extended_status: 32-bit SFS extended status value (output).
27 */
28struct sfs_user_get_fw_versions {
29 __u8 blob[TEE_EXT_CMD_BUFFER_SIZE];
30 __u32 sfs_status;
31 __u32 sfs_extended_status;
32} __packed;
33
34/**
35 * struct sfs_user_update_package - update SFS package (input).
36 * @payload_name: name of SFS package to load, verify and execute (input).
37 * @sfs_status: 32-bit SFS status value (output).
38 * @sfs_extended_status: 32-bit SFS extended status value (output).
39 */
40struct sfs_user_update_package {
41 char payload_name[PAYLOAD_NAME_SIZE];
42 __u32 sfs_status;
43 __u32 sfs_extended_status;
44} __packed;
45
46/**
47 * Seamless Firmware Support (SFS) IOC
48 *
49 * possible return codes for all SFS IOCTLs:
50 * 0: success
51 * -EINVAL: invalid input
52 * -E2BIG: excess data passed
53 * -EFAULT: failed to copy to/from userspace
54 * -EBUSY: mailbox in recovery or in use
55 * -ENODEV: driver not bound with PSP device
56 * -EACCES: request isn't authorized
57 * -EINVAL: invalid parameter
58 * -ETIMEDOUT: request timed out
59 * -EAGAIN: invalid request for state machine
60 * -ENOENT: not implemented
61 * -ENFILE: overflow
62 * -EPERM: invalid signature
63 * -EIO: PSP I/O error
64 */
65#define SFS_IOC_TYPE 'S'
66
67/**
68 * SFSIOCFWVERS - returns blob containing FW versions
69 * ASP provides the current level of Base Firmware for the ASP
70 * and the other microprocessors as well as current patch
71 * level(s).
72 */
73#define SFSIOCFWVERS _IOWR(SFS_IOC_TYPE, 0x1, struct sfs_user_get_fw_versions)
74
75/**
76 * SFSIOCUPDATEPKG - updates package/payload
77 * ASP loads, verifies and executes the SFS package.
78 * By default, the SFS package/payload is loaded from
79 * /lib/firmware/amd, but alternative firmware loading
80 * path can be specified using kernel parameter
81 * firmware_class.path or the firmware loading path
82 * can be customized using sysfs file:
83 * /sys/module/firmware_class/parameters/path.
84 */
85#define SFSIOCUPDATEPKG _IOWR(SFS_IOC_TYPE, 0x2, struct sfs_user_update_package)
86
87#endif /* __PSP_SFS_USER_H__ */