Here is a list of all documented files with brief descriptions:

[detail level 123]

include
tss2
tss2_esys.h
tss2_fapi.h
src
tss2-esys
esys_crypto.h
esys_crypto_mbed.h
esys_crypto_ossl.h
esys_int.h
esys_iutil.h
esys_mu.h
esys_types.h
tss2-fapi
efi_event.h
fapi_certificates.h
fapi_crypto.h
fapi_int.h
fapi_policy.h
fapi_types.h
fapi_util.h
ifapi_config.h
ifapi_curl.h
ifapi_eventlog.h
ifapi_eventlog_system.h
ifapi_get_web_cert.h
ifapi_helpers.h
ifapi_ima_eventlog.h
ifapi_io.h
ifapi_json_deserialize.h
ifapi_json_eventlog_deserialize.h
ifapi_json_eventlog_serialize.h
ifapi_json_serialize.h
ifapi_keystore.h
ifapi_macros.h
ifapi_policy.h
ifapi_policy_calculate.h
ifapi_policy_callbacks.h
ifapi_policy_execute.h
ifapi_policy_instantiate.h
ifapi_policy_json_deserialize.h
ifapi_policy_json_serialize.h
ifapi_policy_store.h
ifapi_policy_types.h
ifapi_policyutil_execute.h
ifapi_profiles.h
tpm_json_deserialize.h
tpm_json_serialize.h