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