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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
36struct tpm_class_ops {
37 const u8 req_complete_mask;
38 const u8 req_complete_val;
39 bool (*req_canceled)(struct tpm_chip *chip, u8 status);
40 int (*recv) (struct tpm_chip *chip, u8 *buf, size_t len);
41 int (*send) (struct tpm_chip *chip, u8 *buf, size_t len);
42 void (*cancel) (struct tpm_chip *chip);
43 u8 (*status) (struct tpm_chip *chip);
44 bool (*update_timeouts)(struct tpm_chip *chip,
45 unsigned long *timeout_cap);
46
47};
48
49#if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)
50
51extern int tpm_is_tpm2(u32 chip_num);
52extern int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf);
53extern int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash);
54extern int tpm_send(u32 chip_num, void *cmd, size_t buflen);
55extern int tpm_get_random(u32 chip_num, u8 *data, size_t max);
56extern int tpm_seal_trusted(u32 chip_num,
57 struct trusted_key_payload *payload,
58 struct trusted_key_options *options);
59extern int tpm_unseal_trusted(u32 chip_num,
60 struct trusted_key_payload *payload,
61 struct trusted_key_options *options);
62#else
63static inline int tpm_is_tpm2(u32 chip_num)
64{
65 return -ENODEV;
66}
67static inline int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) {
68 return -ENODEV;
69}
70static inline int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) {
71 return -ENODEV;
72}
73static inline int tpm_send(u32 chip_num, void *cmd, size_t buflen) {
74 return -ENODEV;
75}
76static inline int tpm_get_random(u32 chip_num, u8 *data, size_t max) {
77 return -ENODEV;
78}
79
80static inline int tpm_seal_trusted(u32 chip_num,
81 struct trusted_key_payload *payload,
82 struct trusted_key_options *options)
83{
84 return -ENODEV;
85}
86static inline int tpm_unseal_trusted(u32 chip_num,
87 struct trusted_key_payload *payload,
88 struct trusted_key_options *options)
89{
90 return -ENODEV;
91}
92#endif
93#endif
94