staging: ccree: add FIPS support

Add FIPS mode support to CryptoCell driver

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 96 insertions, 0 deletions

diff --git a/drivers/staging/ccree/ssi_fips_ext.c b/drivers/staging/ccree/ssi_fips_ext.c
new file mode 100644
index 000000000000..2ac432fe1233
--- /dev/null
+++ b/drivers/staging/ccree/ssi_fips_ext.c
@@ -0,0 +1,96 @@
+/*
+ * 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 ssi_fips_state_t fips_state = CC_FIPS_STATE_NOT_SUPPORTED;
+static ssi_fips_error_t 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(ssi_fips_state_t *p_state)
+{
+        int rc = 0;
+
+	if (p_state == NULL) {
+		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(ssi_fips_error_t *p_err)
+{
+        int rc = 0;
+
+	if (p_err == NULL) {
+		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(ssi_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(ssi_fips_error_t err)
+{
+	fips_error = err;
+	return 0;
+}
+
+