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 /**
  42  * Global static parameter used to create a unique name for each crypto device.
  43  */
  44 static unsigned unique_name_id;
  45
  46 static inline int
  47 create_unique_device_name(char *name, size_t size)
  48 {
  49         int ret;
  50
  51         if (name == NULL)
  52                 return -EINVAL;
  53
  54         ret = snprintf(name, size, "%s_%u", RTE_STR(CRYPTODEV_NAME_NULL_PMD),
  55                         unique_name_id++);
  56         if (ret < 0)
  57                 return ret;
  58         return 0;
  59 }
  60
  61
  62 /** verify and set session parameters */
  63 int
  64 null_crypto_set_session_parameters(
  65                 struct null_crypto_session *sess __rte_unused,
  66                 const struct rte_crypto_sym_xform *xform)
  67 {
  68         if (xform == NULL) {
  69                 return -1;
  70         } else if (xform->type == RTE_CRYPTO_SYM_XFORM_AUTH &&
  71                         xform->next == NULL) {
  72                 /* Authentication Only */
  73                 if (xform->auth.algo == RTE_CRYPTO_AUTH_NULL)
  74                         return 0;
  75         } else if (xform->type == RTE_CRYPTO_SYM_XFORM_AUTH &&
  76                         xform->next->type == RTE_CRYPTO_SYM_XFORM_CIPHER) {
  77                 /* Authentication then Cipher */
  78                 if (xform->auth.algo == RTE_CRYPTO_AUTH_NULL &&
  79                         xform->next->cipher.algo == RTE_CRYPTO_CIPHER_NULL)
  80                         return 0;
  81         } else if (xform->type == RTE_CRYPTO_SYM_XFORM_CIPHER &&
  82                         xform->next == NULL) {
  83                 /* Cipher Only */
  84                 if (xform->cipher.algo == RTE_CRYPTO_CIPHER_NULL)
  85                         return 0;
  86         } else if (xform->type == RTE_CRYPTO_SYM_XFORM_CIPHER &&
  87                         xform->next->type == RTE_CRYPTO_SYM_XFORM_AUTH) {
  88                 /* Cipher then Authentication */
  89                 if (xform->cipher.algo == RTE_CRYPTO_CIPHER_NULL &&
  90                         xform->next->auth.algo == RTE_CRYPTO_AUTH_NULL)
  91                         return 0;
  92         }
  93
  94         return -1;
  95 }
  96
  97 /** Process crypto operation for mbuf */
  98 static int
  99 process_op(const struct null_crypto_qp *qp, struct rte_crypto_op *op,
 100                 struct null_crypto_session *sess __rte_unused)
 101 {
 102         /* set status as successful by default */
 103         op->status = RTE_CRYPTO_OP_STATUS_SUCCESS;
 104
 105         /*
 106          * if crypto session and operation are valid just enqueue the packet
 107          * in the processed ring
 108          */
 109         return rte_ring_enqueue(qp->processed_pkts, (void *)op);
 110 }
 111
 112 static struct null_crypto_session *
 113 get_session(struct null_crypto_qp *qp, struct rte_crypto_sym_op *op)
 114 {
 115         struct null_crypto_session *sess;
 116
 117         if (op->sess_type == RTE_CRYPTO_SYM_OP_WITH_SESSION) {
 118                 if (unlikely(op->session == NULL ||
 119                              op->session->dev_type != RTE_CRYPTODEV_NULL_PMD))
 120                         return NULL;
 121
 122                 sess = (struct null_crypto_session *)op->session->_private;
 123         } else  {
 124                 struct rte_cryptodev_session *c_sess = NULL;
 125
 126                 if (rte_mempool_get(qp->sess_mp, (void **)&c_sess))
 127                         return NULL;
 128
 129                 sess = (struct null_crypto_session *)c_sess->_private;
 130
 131                 if (null_crypto_set_session_parameters(sess, op->xform) != 0)
 132                         return NULL;
 133         }
 134
 135         return sess;
 136 }
 137
 138 /** Enqueue burst */
 139 static uint16_t
 140 null_crypto_pmd_enqueue_burst(void *queue_pair, struct rte_crypto_op **ops,
 141                 uint16_t nb_ops)
 142 {
 143         struct null_crypto_session *sess;
 144         struct null_crypto_qp *qp = queue_pair;
 145
 146         int i, retval;
 147
 148         for (i = 0; i < nb_ops; i++) {
 149                 sess = get_session(qp, ops[i]->sym);
 150                 if (unlikely(sess == NULL))
 151                         goto enqueue_err;
 152
 153                 retval = process_op(qp, ops[i], sess);
 154                 if (unlikely(retval < 0))
 155                         goto enqueue_err;
 156         }
 157
 158         qp->qp_stats.enqueued_count += i;
 159         return i;
 160
 161 enqueue_err:
 162         if (ops[i])
 163                 ops[i]->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
 164
 165         qp->qp_stats.enqueue_err_count++;
 166         return i;
 167 }
 168
 169 /** Dequeue burst */
 170 static uint16_t
 171 null_crypto_pmd_dequeue_burst(void *queue_pair, struct rte_crypto_op **ops,
 172                 uint16_t nb_ops)
 173 {
 174         struct null_crypto_qp *qp = queue_pair;
 175
 176         unsigned nb_dequeued;
 177
 178         nb_dequeued = rte_ring_dequeue_burst(qp->processed_pkts,
 179                         (void **)ops, nb_ops);
 180         qp->qp_stats.dequeued_count += nb_dequeued;
 181
 182         return nb_dequeued;
 183 }
 184
 185 static int cryptodev_null_remove(const char *name);
 186
 187 /** Create crypto device */
 188 static int
 189 cryptodev_null_create(const char *name,
 190                 struct rte_crypto_vdev_init_params *init_params)
 191 {
 192         struct rte_cryptodev *dev;
 193         char crypto_dev_name[RTE_CRYPTODEV_NAME_MAX_LEN];
 194         struct null_crypto_private *internals;
 195
 196         /* create a unique device name */
 197         if (create_unique_device_name(crypto_dev_name,
 198                         RTE_CRYPTODEV_NAME_MAX_LEN) != 0) {
 199                 NULL_CRYPTO_LOG_ERR("failed to create unique cryptodev name");
 200                 return -EINVAL;
 201         }
 202
 203         dev = rte_cryptodev_pmd_virtual_dev_init(crypto_dev_name,
 204                         sizeof(struct null_crypto_private),
 205                         init_params->socket_id);
 206         if (dev == NULL) {
 207                 NULL_CRYPTO_LOG_ERR("failed to create cryptodev vdev");
 208                 goto init_error;
 209         }
 210
 211         dev->dev_type = RTE_CRYPTODEV_NULL_PMD;
 212         dev->dev_ops = null_crypto_pmd_ops;
 213
 214         /* register rx/tx burst functions for data path */
 215         dev->dequeue_burst = null_crypto_pmd_dequeue_burst;
 216         dev->enqueue_burst = null_crypto_pmd_enqueue_burst;
 217
 218         dev->feature_flags = RTE_CRYPTODEV_FF_SYMMETRIC_CRYPTO |
 219                         RTE_CRYPTODEV_FF_SYM_OPERATION_CHAINING;
 220
 221         internals = dev->data->dev_private;
 222
 223         internals->max_nb_qpairs = init_params->max_nb_queue_pairs;
 224         internals->max_nb_sessions = init_params->max_nb_sessions;
 225
 226         return 0;
 227
 228 init_error:
 229         NULL_CRYPTO_LOG_ERR("driver %s: cryptodev_null_create failed", name);
 230         cryptodev_null_remove(crypto_dev_name);
 231
 232         return -EFAULT;
 233 }
 234
 235 /** Initialise null crypto device */
 236 static int
 237 cryptodev_null_probe(const char *name,
 238                 const char *input_args)
 239 {
 240         struct rte_crypto_vdev_init_params init_params = {
 241                 RTE_CRYPTODEV_VDEV_DEFAULT_MAX_NB_QUEUE_PAIRS,
 242                 RTE_CRYPTODEV_VDEV_DEFAULT_MAX_NB_SESSIONS,
 243                 rte_socket_id()
 244         };
 245
 246         rte_cryptodev_parse_vdev_init_params(&init_params, input_args);
 247
 248         RTE_LOG(INFO, PMD, "Initialising %s on NUMA node %d\n", name,
 249                         init_params.socket_id);
 250         RTE_LOG(INFO, PMD, "  Max number of queue pairs = %d\n",
 251                         init_params.max_nb_queue_pairs);
 252         RTE_LOG(INFO, PMD, "  Max number of sessions = %d\n",
 253                         init_params.max_nb_sessions);
 254
 255         return cryptodev_null_create(name, &init_params);
 256 }
 257
 258 /** Uninitialise null crypto device */
 259 static int
 260 cryptodev_null_remove(const char *name)
 261 {
 262         if (name == NULL)
 263                 return -EINVAL;
 264
 265         RTE_LOG(INFO, PMD, "Closing null crypto device %s on numa socket %u\n",
 266                         name, rte_socket_id());
 267
 268         return 0;
 269 }
 270
 271 static struct rte_vdev_driver cryptodev_null_pmd_drv = {
 272         .probe = cryptodev_null_probe,
 273         .remove = cryptodev_null_remove
 274 };
 275
 276 RTE_PMD_REGISTER_VDEV(CRYPTODEV_NAME_NULL_PMD, cryptodev_null_pmd_drv);
 277 RTE_PMD_REGISTER_ALIAS(CRYPTODEV_NAME_NULL_PMD, cryptodev_null_pmd);
 278 RTE_PMD_REGISTER_PARAM_STRING(CRYPTODEV_NAME_NULL_PMD,
 279         "max_nb_queue_pairs=<int> "
 280         "max_nb_sessions=<int> "
 281         "socket_id=<int>");