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/*
* Copyright (C) 2012-2017 ARM Limited or its affiliates.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
/**************************************************************
* This file defines the driver FIPS functions that should be
* implemented by the driver user. Current implementation is sample code only.
***************************************************************/
#include <linux/module.h>
#include "ssi_fips_local.h"
#include "ssi_driver.h"
static bool tee_error;
module_param(tee_error, bool, 0644);
MODULE_PARM_DESC(tee_error, "Simulate TEE library failure flag: 0 - no error (default), 1 - TEE error occured ");
static enum cc_fips_state_t fips_state = CC_FIPS_STATE_NOT_SUPPORTED;
static enum cc_fips_error fips_error = CC_REE_FIPS_ERROR_OK;
/*
* This function returns the FIPS REE state.
* The function should be implemented by the driver user, depends on where
* the state value is stored.
* The reference code uses global variable.
*/
int ssi_fips_ext_get_state(enum cc_fips_state_t *p_state)
{
int rc = 0;
if (!p_state)
return -EINVAL;
*p_state = fips_state;
return rc;
}
/*
* This function returns the FIPS REE error.
* The function should be implemented by the driver user, depends on where
* the error value is stored.
* The reference code uses global variable.
*/
int ssi_fips_ext_get_error(enum cc_fips_error *p_err)
{
int rc = 0;
if (!p_err)
return -EINVAL;
*p_err = fips_error;
return rc;
}
/*
* This function sets the FIPS REE state.
* The function should be implemented by the driver user, depends on where
* the state value is stored.
* The reference code uses global variable.
*/
int ssi_fips_ext_set_state(enum cc_fips_state_t state)
{
fips_state = state;
return 0;
}
/*
* This function sets the FIPS REE error.
* The function should be implemented by the driver user, depends on where
* the error value is stored.
* The reference code uses global variable.
*/
int ssi_fips_ext_set_error(enum cc_fips_error err)
{
fips_error = err;
return 0;
}
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