1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/common/cpt/cpt_pmd_ops_helper.c b/drivers/common/cpt/cpt_pmd_ops_helper.c
new file mode 100644
index 00000000..1c18180f
--- /dev/null
+++ b/drivers/common/cpt/cpt_pmd_ops_helper.c
@@ -0,0 +1,41 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Cavium, Inc
+ */
+
+#include <rte_common.h>
+
+#include "cpt_common.h"
+#include "cpt_hw_types.h"
+#include "cpt_mcode_defines.h"
+#include "cpt_pmd_ops_helper.h"
+
+#define CPT_MAX_IV_LEN 16
+#define CPT_OFFSET_CONTROL_BYTES 8
+
+int32_t
+cpt_pmd_ops_helper_get_mlen_direct_mode(void)
+{
+	uint32_t len = 0;
+
+	/* Request structure */
+	len = sizeof(struct cpt_request_info);
+
+	/* CPT HW result structure plus extra as it is aligned */
+	len += 2*sizeof(cpt_res_s_t);
+
+	return len;
+}
+
+int
+cpt_pmd_ops_helper_get_mlen_sg_mode(void)
+{
+	uint32_t len = 0;
+
+	len += sizeof(struct cpt_request_info);
+	len += CPT_OFFSET_CONTROL_BYTES + CPT_MAX_IV_LEN;
+	len += ROUNDUP8(SG_LIST_HDR_SIZE +
+			(ROUNDUP4(CPT_MAX_SG_IN_OUT_CNT) >> 2) * SG_ENTRY_SIZE);
+	len += 2 * COMPLETION_CODE_SIZE;
+	len += 2 * sizeof(cpt_res_s_t);
+	return len;
+}