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tpm: factor out tpm_startup function

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TPM manual startup is used only from within TPM 1.x or TPM 2.x
code, hence remove tpm_startup() function from tpm-interface.c
and add two static functions implementations tpm1_startup()
and tpm2_startup() into to tpm1-cmd.c and tpm2-cmd.c respectively.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
This commit is contained in:
Tomas Winkler
2018-10-19 21:22:58 +03:00
committed by Jarkko Sakkinen
parent c82a330cec
commit 9db7fe187c
4 changed files with 68 additions and 45 deletions
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34
drivers/char/tpm/tpm2-cmd.c
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@@ -948,6 +948,36 @@ out:
return rc;
}
/**
* tpm2_startup - turn on the TPM
* @chip: TPM chip to use
*
* Normally the firmware should start the TPM. This function is provided as a
* workaround if this does not happen. A legal case for this could be for
* example when a TPM emulator is used.
*
* Return: same as tpm_transmit_cmd()
*/
static int tpm2_startup(struct tpm_chip *chip)
{
struct tpm_buf buf;
int rc;
dev_info(&chip->dev, "starting up the TPM manually\n");
rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_STARTUP);
if (rc < 0)
return rc;
tpm_buf_append_u16(&buf, TPM2_SU_CLEAR);
rc = tpm_transmit_cmd(chip, NULL, buf.data, PAGE_SIZE, 0, 0,
"attempting to start the TPM");
tpm_buf_destroy(&buf);
return rc;
}
/**
* tpm2_auto_startup - Perform the standard automatic TPM initialization
* sequence
@@ -959,7 +989,7 @@ int tpm2_auto_startup(struct tpm_chip *chip)
{
int rc;
rc = tpm_get_timeouts(chip);
rc = tpm2_get_timeouts(chip);
if (rc)
goto out;
@@ -968,7 +998,7 @@ int tpm2_auto_startup(struct tpm_chip *chip)
goto out;
if (rc == TPM2_RC_INITIALIZE) {
rc = tpm_startup(chip);
rc = tpm2_startup(chip);
if (rc)
goto out;