1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22#ifndef __LINUX_TPM_H__
23#define __LINUX_TPM_H__
24
25#define TPM_DIGEST_SIZE 20
26
27
28
29
30#define TPM_ANY_NUM 0xFFFF
31
32struct tpm_chip;
33struct trusted_key_payload;
34struct trusted_key_options;
35
36enum TPM_OPS_FLAGS {
37 TPM_OPS_AUTO_STARTUP = BIT(0),
38};
39
40struct tpm_class_ops {
41 unsigned int flags;
42 const u8 req_complete_mask;
43 const u8 req_complete_val;
44 bool (*req_canceled)(struct tpm_chip *chip, u8 status);
45 int (*recv) (struct tpm_chip *chip, u8 *buf, size_t len);
46 int (*send) (struct tpm_chip *chip, u8 *buf, size_t len);
47 void (*cancel) (struct tpm_chip *chip);
48 u8 (*status) (struct tpm_chip *chip);
49 bool (*update_timeouts)(struct tpm_chip *chip,
50 unsigned long *timeout_cap);
51 int (*request_locality)(struct tpm_chip *chip, int loc);
52 void (*relinquish_locality)(struct tpm_chip *chip, int loc);
53};
54
55#if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)
56
57extern int tpm_is_tpm2(u32 chip_num);
58extern int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf);
59extern int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash);
60extern int tpm_send(u32 chip_num, void *cmd, size_t buflen);
61extern int tpm_get_random(u32 chip_num, u8 *data, size_t max);
62extern int tpm_seal_trusted(u32 chip_num,
63 struct trusted_key_payload *payload,
64 struct trusted_key_options *options);
65extern int tpm_unseal_trusted(u32 chip_num,
66 struct trusted_key_payload *payload,
67 struct trusted_key_options *options);
68#else
69static inline int tpm_is_tpm2(u32 chip_num)
70{
71 return -ENODEV;
72}
73static inline int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) {
74 return -ENODEV;
75}
76static inline int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) {
77 return -ENODEV;
78}
79static inline int tpm_send(u32 chip_num, void *cmd, size_t buflen) {
80 return -ENODEV;
81}
82static inline int tpm_get_random(u32 chip_num, u8 *data, size_t max) {
83 return -ENODEV;
84}
85
86static inline int tpm_seal_trusted(u32 chip_num,
87 struct trusted_key_payload *payload,
88 struct trusted_key_options *options)
89{
90 return -ENODEV;
91}
92static inline int tpm_unseal_trusted(u32 chip_num,
93 struct trusted_key_payload *payload,
94 struct trusted_key_options *options)
95{
96 return -ENODEV;
97}
98#endif
99#endif
100