drivers/crypto/null/null_crypto_pmd.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2016 Intel Corporation. All rights reserved.
   5  *
   6  *   Redistribution and use in source and binary forms, with or without
   7  *   modification, are permitted provided that the following conditions
   8  *   are met:
   9  *
  10  *     * Redistributions of source code must retain the above copyright
  11  *       notice, this list of conditions and the following disclaimer.
  12  *     * Redistributions in binary form must reproduce the above copyright
  13  *       notice, this list of conditions and the following disclaimer in
  14  *       the documentation and/or other materials provided with the
  15  *       distribution.
  16  *     * Neither the name of Intel Corporation nor the names of its
  17  *       contributors may be used to endorse or promote products derived
  18  *       from this software without specific prior written permission.
  19  *
  20  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <rte_common.h>
  34 #include <rte_config.h>
  35 #include <rte_cryptodev_pmd.h>
  36 #include <rte_vdev.h>
  37 #include <rte_malloc.h>
  38
  39 #include "null_crypto_pmd_private.h"
  40
  41 /** verify and set session parameters */
  42 int
  43 null_crypto_set_session_parameters(
  44                 struct null_crypto_session *sess __rte_unused,
  45                 const struct rte_crypto_sym_xform *xform)
  46 {
  47         if (xform == NULL) {
  48                 return -1;
  49         } else if (xform->type == RTE_CRYPTO_SYM_XFORM_AUTH &&
  50                         xform->next == NULL) {
  51                 /* Authentication Only */
  52                 if (xform->auth.algo == RTE_CRYPTO_AUTH_NULL)
  53                         return 0;
  54         } else if (xform->type == RTE_CRYPTO_SYM_XFORM_AUTH &&
  55                         xform->next->type == RTE_CRYPTO_SYM_XFORM_CIPHER) {
  56                 /* Authentication then Cipher */
  57                 if (xform->auth.algo == RTE_CRYPTO_AUTH_NULL &&
  58                         xform->next->cipher.algo == RTE_CRYPTO_CIPHER_NULL)
  59                         return 0;
  60         } else if (xform->type == RTE_CRYPTO_SYM_XFORM_CIPHER &&
  61                         xform->next == NULL) {
  62                 /* Cipher Only */
  63                 if (xform->cipher.algo == RTE_CRYPTO_CIPHER_NULL)
  64                         return 0;
  65         } else if (xform->type == RTE_CRYPTO_SYM_XFORM_CIPHER &&
  66                         xform->next->type == RTE_CRYPTO_SYM_XFORM_AUTH) {
  67                 /* Cipher then Authentication */
  68                 if (xform->cipher.algo == RTE_CRYPTO_CIPHER_NULL &&
  69                         xform->next->auth.algo == RTE_CRYPTO_AUTH_NULL)
  70                         return 0;
  71         }
  72
  73         return -1;
  74 }
  75
  76 /** Process crypto operation for mbuf */
  77 static int
  78 process_op(const struct null_crypto_qp *qp, struct rte_crypto_op *op,
  79                 struct null_crypto_session *sess __rte_unused)
  80 {
  81         /* set status as successful by default */
  82         op->status = RTE_CRYPTO_OP_STATUS_SUCCESS;
  83
  84         /*
  85          * if crypto session and operation are valid just enqueue the packet
  86          * in the processed ring
  87          */
  88         return rte_ring_enqueue(qp->processed_pkts, (void *)op);
  89 }
  90
  91 static struct null_crypto_session *
  92 get_session(struct null_crypto_qp *qp, struct rte_crypto_sym_op *op)
  93 {
  94         struct null_crypto_session *sess;
  95
  96         if (op->sess_type == RTE_CRYPTO_SYM_OP_WITH_SESSION) {
  97                 if (unlikely(op->session == NULL ||
  98                              op->session->dev_type != RTE_CRYPTODEV_NULL_PMD))
  99                         return NULL;
 100
 101                 sess = (struct null_crypto_session *)op->session->_private;
 102         } else  {
 103                 struct rte_cryptodev_session *c_sess = NULL;
 104
 105                 if (rte_mempool_get(qp->sess_mp, (void **)&c_sess))
 106                         return NULL;
 107
 108                 sess = (struct null_crypto_session *)c_sess->_private;
 109
 110                 if (null_crypto_set_session_parameters(sess, op->xform) != 0)
 111                         return NULL;
 112         }
 113
 114         return sess;
 115 }
 116
 117 /** Enqueue burst */
 118 static uint16_t
 119 null_crypto_pmd_enqueue_burst(void *queue_pair, struct rte_crypto_op **ops,
 120                 uint16_t nb_ops)
 121 {
 122         struct null_crypto_session *sess;
 123         struct null_crypto_qp *qp = queue_pair;
 124
 125         int i, retval;
 126
 127         for (i = 0; i < nb_ops; i++) {
 128                 sess = get_session(qp, ops[i]->sym);
 129                 if (unlikely(sess == NULL))
 130                         goto enqueue_err;
 131
 132                 retval = process_op(qp, ops[i], sess);
 133                 if (unlikely(retval < 0))
 134                         goto enqueue_err;
 135         }
 136
 137         qp->qp_stats.enqueued_count += i;
 138         return i;
 139
 140 enqueue_err:
 141         if (ops[i])
 142                 ops[i]->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
 143
 144         qp->qp_stats.enqueue_err_count++;
 145         return i;
 146 }
 147
 148 /** Dequeue burst */
 149 static uint16_t
 150 null_crypto_pmd_dequeue_burst(void *queue_pair, struct rte_crypto_op **ops,
 151                 uint16_t nb_ops)
 152 {
 153         struct null_crypto_qp *qp = queue_pair;
 154
 155         unsigned nb_dequeued;
 156
 157         nb_dequeued = rte_ring_dequeue_burst(qp->processed_pkts,
 158                         (void **)ops, nb_ops, NULL);
 159         qp->qp_stats.dequeued_count += nb_dequeued;
 160
 161         return nb_dequeued;
 162 }
 163
 164 static int cryptodev_null_remove(const char *name);
 165
 166 /** Create crypto device */
 167 static int
 168 cryptodev_null_create(struct rte_crypto_vdev_init_params *init_params)
 169 {
 170         struct rte_cryptodev *dev;
 171         struct null_crypto_private *internals;
 172
 173         if (init_params->name[0] == '\0') {
 174                 int ret = rte_cryptodev_pmd_create_dev_name(
 175                                 init_params->name,
 176                                 RTE_STR(CRYPTODEV_NAME_NULL_PMD));
 177
 178                 if (ret < 0) {
 179                         NULL_CRYPTO_LOG_ERR("failed to create unique "
 180                                         "name");
 181                         return ret;
 182                 }
 183         }
 184
 185         dev = rte_cryptodev_pmd_virtual_dev_init(init_params->name,
 186                         sizeof(struct null_crypto_private),
 187                         init_params->socket_id);
 188         if (dev == NULL) {
 189                 NULL_CRYPTO_LOG_ERR("failed to create cryptodev vdev");
 190                 goto init_error;
 191         }
 192
 193         dev->dev_type = RTE_CRYPTODEV_NULL_PMD;
 194         dev->dev_ops = null_crypto_pmd_ops;
 195
 196         /* register rx/tx burst functions for data path */
 197         dev->dequeue_burst = null_crypto_pmd_dequeue_burst;
 198         dev->enqueue_burst = null_crypto_pmd_enqueue_burst;
 199
 200         dev->feature_flags = RTE_CRYPTODEV_FF_SYMMETRIC_CRYPTO |
 201                         RTE_CRYPTODEV_FF_SYM_OPERATION_CHAINING |
 202                         RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER;
 203
 204         internals = dev->data->dev_private;
 205
 206         internals->max_nb_qpairs = init_params->max_nb_queue_pairs;
 207         internals->max_nb_sessions = init_params->max_nb_sessions;
 208
 209         return 0;
 210
 211 init_error:
 212         NULL_CRYPTO_LOG_ERR("driver %s: cryptodev_null_create failed",
 213                         init_params->name);
 214         cryptodev_null_remove(init_params->name);
 215
 216         return -EFAULT;
 217 }
 218
 219 /** Initialise null crypto device */
 220 static int
 221 cryptodev_null_probe(const char *name,
 222                 const char *input_args)
 223 {
 224         struct rte_crypto_vdev_init_params init_params = {
 225                 RTE_CRYPTODEV_VDEV_DEFAULT_MAX_NB_QUEUE_PAIRS,
 226                 RTE_CRYPTODEV_VDEV_DEFAULT_MAX_NB_SESSIONS,
 227                 rte_socket_id(),
 228                 {0}
 229         };
 230
 231         rte_cryptodev_parse_vdev_init_params(&init_params, input_args);
 232
 233         RTE_LOG(INFO, PMD, "Initialising %s on NUMA node %d\n", name,
 234                         init_params.socket_id);
 235         if (init_params.name[0] != '\0')
 236                 RTE_LOG(INFO, PMD, "  User defined name = %s\n",
 237                         init_params.name);
 238         RTE_LOG(INFO, PMD, "  Max number of queue pairs = %d\n",
 239                         init_params.max_nb_queue_pairs);
 240         RTE_LOG(INFO, PMD, "  Max number of sessions = %d\n",
 241                         init_params.max_nb_sessions);
 242
 243         return cryptodev_null_create(&init_params);
 244 }
 245
 246 /** Uninitialise null crypto device */
 247 static int
 248 cryptodev_null_remove(const char *name)
 249 {
 250         if (name == NULL)
 251                 return -EINVAL;
 252
 253         RTE_LOG(INFO, PMD, "Closing null crypto device %s on numa socket %u\n",
 254                         name, rte_socket_id());
 255
 256         return 0;
 257 }
 258
 259 static struct rte_vdev_driver cryptodev_null_pmd_drv = {
 260         .probe = cryptodev_null_probe,
 261         .remove = cryptodev_null_remove
 262 };
 263
 264 RTE_PMD_REGISTER_VDEV(CRYPTODEV_NAME_NULL_PMD, cryptodev_null_pmd_drv);
 265 RTE_PMD_REGISTER_ALIAS(CRYPTODEV_NAME_NULL_PMD, cryptodev_null_pmd);
 266 RTE_PMD_REGISTER_PARAM_STRING(CRYPTODEV_NAME_NULL_PMD,
 267         "max_nb_queue_pairs=<int> "
 268         "max_nb_sessions=<int> "
 269         "socket_id=<int>");