drivers/common/cpt/cpt_ucode.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2018 Cavium, Inc
   3  */
   4
   5 #ifndef _CPT_UCODE_H_
   6 #define _CPT_UCODE_H_
   7
   8 #include "cpt_mcode_defines.h"
   9
  10 /*
  11  * This file defines functions that are interfaces to microcode spec.
  12  *
  13  */
  14
  15 static __rte_always_inline int
  16 cpt_is_algo_supported(struct rte_crypto_sym_xform *xform)
  17 {
  18         /*
  19          * Microcode only supports the following combination.
  20          * Encryption followed by authentication
  21          * Authentication followed by decryption
  22          */
  23         if (xform->next) {
  24                 if ((xform->type == RTE_CRYPTO_SYM_XFORM_AUTH) &&
  25                     (xform->next->type == RTE_CRYPTO_SYM_XFORM_CIPHER) &&
  26                     (xform->next->cipher.op == RTE_CRYPTO_CIPHER_OP_ENCRYPT)) {
  27                         /* Unsupported as of now by microcode */
  28                         CPT_LOG_DP_ERR("Unsupported combination");
  29                         return -1;
  30                 }
  31                 if ((xform->type == RTE_CRYPTO_SYM_XFORM_CIPHER) &&
  32                     (xform->next->type == RTE_CRYPTO_SYM_XFORM_AUTH) &&
  33                     (xform->cipher.op == RTE_CRYPTO_CIPHER_OP_DECRYPT)) {
  34                         /* For GMAC auth there is no cipher operation */
  35                         if (xform->aead.algo != RTE_CRYPTO_AEAD_AES_GCM ||
  36                             xform->next->auth.algo !=
  37                             RTE_CRYPTO_AUTH_AES_GMAC) {
  38                                 /* Unsupported as of now by microcode */
  39                                 CPT_LOG_DP_ERR("Unsupported combination");
  40                                 return -1;
  41                         }
  42                 }
  43         }
  44         return 0;
  45 }
  46
  47 #endif /*_CPT_UCODE_H_ */