1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * AMD Secure Processor Dynamic Boost Control sample library
4 *
5 * Copyright (C) 2023 Advanced Micro Devices, Inc.
6 *
7 * Author: Mario Limonciello <mario.limonciello@amd.com>
8 */
9
10 #include <assert.h>
11 #include <string.h>
12 #include <sys/ioctl.h>
13
14 /* if uapi header isn't installed, this might not yet exist */
15 #ifndef __packed
16 #define __packed __attribute__((packed))
17 #endif
18 #include <linux/psp-dbc.h>
19
get_nonce(int fd,void * nonce_out,void * signature)20 int get_nonce(int fd, void *nonce_out, void *signature)
21 {
22 struct dbc_user_nonce tmp = {
23 .auth_needed = !!signature,
24 };
25 int ret;
26
27 assert(nonce_out);
28
29 if (signature)
30 memcpy(tmp.signature, signature, sizeof(tmp.signature));
31
32 ret = ioctl(fd, DBCIOCNONCE, &tmp);
33 if (ret)
34 return ret;
35 memcpy(nonce_out, tmp.nonce, sizeof(tmp.nonce));
36
37 return 0;
38 }
39
set_uid(int fd,__u8 * uid,__u8 * signature)40 int set_uid(int fd, __u8 *uid, __u8 *signature)
41 {
42 struct dbc_user_setuid tmp;
43
44 assert(uid);
45 assert(signature);
46
47 memcpy(tmp.uid, uid, sizeof(tmp.uid));
48 memcpy(tmp.signature, signature, sizeof(tmp.signature));
49
50 return ioctl(fd, DBCIOCUID, &tmp);
51 }
52
process_param(int fd,int msg_index,__u8 * signature,int * data)53 int process_param(int fd, int msg_index, __u8 *signature, int *data)
54 {
55 struct dbc_user_param tmp = {
56 .msg_index = msg_index,
57 .param = *data,
58 };
59 int ret;
60
61 assert(signature);
62 assert(data);
63
64 memcpy(tmp.signature, signature, sizeof(tmp.signature));
65
66 ret = ioctl(fd, DBCIOCPARAM, &tmp);
67 if (ret)
68 return ret;
69
70 *data = tmp.param;
71 return 0;
72 }
73
