drivers/char/tpm/tpm_ftpm_tee.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) Microsoft Corporation
   4  */
   5
   6 #ifndef __TPM_FTPM_TEE_H__
   7 #define __TPM_FTPM_TEE_H__
   8
   9 #include <linux/tee_drv.h>
  10 #include <linux/tpm.h>
  11 #include <linux/uuid.h>
  12
  13 /* The TAFs ID implemented in this TA */
  14 #define FTPM_OPTEE_TA_SUBMIT_COMMAND  (0)
  15 #define FTPM_OPTEE_TA_EMULATE_PPI     (1)
  16
  17 /* max. buffer size supported by fTPM  */
  18 #define MAX_COMMAND_SIZE       4096
  19 #define MAX_RESPONSE_SIZE      4096
  20
  21 /**
  22  * struct ftpm_tee_private - fTPM's private data
  23  * @chip:     struct tpm_chip instance registered with tpm framework.
  24  * @state:    internal state
  25  * @session:  fTPM TA session identifier.
  26  * @resp_len: cached response buffer length.
  27  * @resp_buf: cached response buffer.
  28  * @ctx:      TEE context handler.
  29  * @shm:      Memory pool shared with fTPM TA in TEE.
  30  */
  31 struct ftpm_tee_private {
  32         struct tpm_chip *chip;
  33         u32 session;
  34         size_t resp_len;
  35         u8 resp_buf[MAX_RESPONSE_SIZE];
  36         struct tee_context *ctx;
  37         struct tee_shm *shm;
  38 };
  39
  40 #endif /* __TPM_FTPM_TEE_H__ */