drivers/crypto/snow3g/rte_snow3g_pmd_ops.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 <string.h>
  34
  35 #include <rte_common.h>
  36 #include <rte_malloc.h>
  37 #include <rte_cryptodev_pmd.h>
  38
  39 #include "rte_snow3g_pmd_private.h"
  40
  41 static const struct rte_cryptodev_capabilities snow3g_pmd_capabilities[] = {
  42         {       /* SNOW 3G (UIA2) */
  43                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
  44                 {.sym = {
  45                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
  46                         {.auth = {
  47                                 .algo = RTE_CRYPTO_AUTH_SNOW3G_UIA2,
  48                                 .block_size = 16,
  49                                 .key_size = {
  50                                         .min = 16,
  51                                         .max = 16,
  52                                         .increment = 0
  53                                 },
  54                                 .digest_size = {
  55                                         .min = 4,
  56                                         .max = 4,
  57                                         .increment = 0
  58                                 },
  59                                 .aad_size = {
  60                                         .min = 16,
  61                                         .max = 16,
  62                                         .increment = 0
  63                                 }
  64                         }, }
  65                 }, }
  66         },
  67         {       /* SNOW 3G (UEA2) */
  68                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
  69                 {.sym = {
  70                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
  71                         {.cipher = {
  72                                 .algo = RTE_CRYPTO_CIPHER_SNOW3G_UEA2,
  73                                 .block_size = 16,
  74                                 .key_size = {
  75                                         .min = 16,
  76                                         .max = 16,
  77                                         .increment = 0
  78                                 },
  79                                 .iv_size = {
  80                                         .min = 16,
  81                                         .max = 16,
  82                                         .increment = 0
  83                                 }
  84                         }, }
  85                 }, }
  86         },
  87         RTE_CRYPTODEV_END_OF_CAPABILITIES_LIST()
  88 };
  89
  90 /** Configure device */
  91 static int
  92 snow3g_pmd_config(__rte_unused struct rte_cryptodev *dev)
  93 {
  94         return 0;
  95 }
  96
  97 /** Start device */
  98 static int
  99 snow3g_pmd_start(__rte_unused struct rte_cryptodev *dev)
 100 {
 101         return 0;
 102 }
 103
 104 /** Stop device */
 105 static void
 106 snow3g_pmd_stop(__rte_unused struct rte_cryptodev *dev)
 107 {
 108 }
 109
 110 /** Close device */
 111 static int
 112 snow3g_pmd_close(__rte_unused struct rte_cryptodev *dev)
 113 {
 114         return 0;
 115 }
 116
 117
 118 /** Get device statistics */
 119 static void
 120 snow3g_pmd_stats_get(struct rte_cryptodev *dev,
 121                 struct rte_cryptodev_stats *stats)
 122 {
 123         int qp_id;
 124
 125         for (qp_id = 0; qp_id < dev->data->nb_queue_pairs; qp_id++) {
 126                 struct snow3g_qp *qp = dev->data->queue_pairs[qp_id];
 127
 128                 stats->enqueued_count += qp->qp_stats.enqueued_count;
 129                 stats->dequeued_count += qp->qp_stats.dequeued_count;
 130
 131                 stats->enqueue_err_count += qp->qp_stats.enqueue_err_count;
 132                 stats->dequeue_err_count += qp->qp_stats.dequeue_err_count;
 133         }
 134 }
 135
 136 /** Reset device statistics */
 137 static void
 138 snow3g_pmd_stats_reset(struct rte_cryptodev *dev)
 139 {
 140         int qp_id;
 141
 142         for (qp_id = 0; qp_id < dev->data->nb_queue_pairs; qp_id++) {
 143                 struct snow3g_qp *qp = dev->data->queue_pairs[qp_id];
 144
 145                 memset(&qp->qp_stats, 0, sizeof(qp->qp_stats));
 146         }
 147 }
 148
 149
 150 /** Get device info */
 151 static void
 152 snow3g_pmd_info_get(struct rte_cryptodev *dev,
 153                 struct rte_cryptodev_info *dev_info)
 154 {
 155         struct snow3g_private *internals = dev->data->dev_private;
 156
 157         if (dev_info != NULL) {
 158                 dev_info->dev_type = dev->dev_type;
 159                 dev_info->max_nb_queue_pairs = internals->max_nb_queue_pairs;
 160                 dev_info->sym.max_nb_sessions = internals->max_nb_sessions;
 161                 dev_info->feature_flags = dev->feature_flags;
 162                 dev_info->capabilities = snow3g_pmd_capabilities;
 163         }
 164 }
 165
 166 /** Release queue pair */
 167 static int
 168 snow3g_pmd_qp_release(struct rte_cryptodev *dev, uint16_t qp_id)
 169 {
 170         if (dev->data->queue_pairs[qp_id] != NULL) {
 171                 rte_free(dev->data->queue_pairs[qp_id]);
 172                 dev->data->queue_pairs[qp_id] = NULL;
 173         }
 174         return 0;
 175 }
 176
 177 /** set a unique name for the queue pair based on its name, dev_id and qp_id */
 178 static int
 179 snow3g_pmd_qp_set_unique_name(struct rte_cryptodev *dev,
 180                 struct snow3g_qp *qp)
 181 {
 182         unsigned n = snprintf(qp->name, sizeof(qp->name),
 183                         "snow3g_pmd_%u_qp_%u",
 184                         dev->data->dev_id, qp->id);
 185
 186         if (n > sizeof(qp->name))
 187                 return -1;
 188
 189         return 0;
 190 }
 191
 192 /** Create a ring to place processed ops on */
 193 static struct rte_ring *
 194 snow3g_pmd_qp_create_processed_ops_ring(struct snow3g_qp *qp,
 195                 unsigned ring_size, int socket_id)
 196 {
 197         struct rte_ring *r;
 198
 199         r = rte_ring_lookup(qp->name);
 200         if (r) {
 201                 if (r->prod.size >= ring_size) {
 202                         SNOW3G_LOG_INFO("Reusing existing ring %s"
 203                                         " for processed packets",
 204                                          qp->name);
 205                         return r;
 206                 }
 207
 208                 SNOW3G_LOG_ERR("Unable to reuse existing ring %s"
 209                                 " for processed packets",
 210                                  qp->name);
 211                 return NULL;
 212         }
 213
 214         return rte_ring_create(qp->name, ring_size, socket_id,
 215                         RING_F_SP_ENQ | RING_F_SC_DEQ);
 216 }
 217
 218 /** Setup a queue pair */
 219 static int
 220 snow3g_pmd_qp_setup(struct rte_cryptodev *dev, uint16_t qp_id,
 221                 const struct rte_cryptodev_qp_conf *qp_conf,
 222                  int socket_id)
 223 {
 224         struct snow3g_qp *qp = NULL;
 225
 226         /* Free memory prior to re-allocation if needed. */
 227         if (dev->data->queue_pairs[qp_id] != NULL)
 228                 snow3g_pmd_qp_release(dev, qp_id);
 229
 230         /* Allocate the queue pair data structure. */
 231         qp = rte_zmalloc_socket("SNOW 3G PMD Queue Pair", sizeof(*qp),
 232                                         RTE_CACHE_LINE_SIZE, socket_id);
 233         if (qp == NULL)
 234                 return (-ENOMEM);
 235
 236         qp->id = qp_id;
 237         dev->data->queue_pairs[qp_id] = qp;
 238
 239         if (snow3g_pmd_qp_set_unique_name(dev, qp))
 240                 goto qp_setup_cleanup;
 241
 242         qp->processed_ops = snow3g_pmd_qp_create_processed_ops_ring(qp,
 243                         qp_conf->nb_descriptors, socket_id);
 244         if (qp->processed_ops == NULL)
 245                 goto qp_setup_cleanup;
 246
 247         qp->sess_mp = dev->data->session_pool;
 248
 249         memset(&qp->qp_stats, 0, sizeof(qp->qp_stats));
 250
 251         return 0;
 252
 253 qp_setup_cleanup:
 254         if (qp)
 255                 rte_free(qp);
 256
 257         return -1;
 258 }
 259
 260 /** Start queue pair */
 261 static int
 262 snow3g_pmd_qp_start(__rte_unused struct rte_cryptodev *dev,
 263                 __rte_unused uint16_t queue_pair_id)
 264 {
 265         return -ENOTSUP;
 266 }
 267
 268 /** Stop queue pair */
 269 static int
 270 snow3g_pmd_qp_stop(__rte_unused struct rte_cryptodev *dev,
 271                 __rte_unused uint16_t queue_pair_id)
 272 {
 273         return -ENOTSUP;
 274 }
 275
 276 /** Return the number of allocated queue pairs */
 277 static uint32_t
 278 snow3g_pmd_qp_count(struct rte_cryptodev *dev)
 279 {
 280         return dev->data->nb_queue_pairs;
 281 }
 282
 283 /** Returns the size of the SNOW 3G session structure */
 284 static unsigned
 285 snow3g_pmd_session_get_size(struct rte_cryptodev *dev __rte_unused)
 286 {
 287         return sizeof(struct snow3g_session);
 288 }
 289
 290 /** Configure a SNOW 3G session from a crypto xform chain */
 291 static void *
 292 snow3g_pmd_session_configure(struct rte_cryptodev *dev __rte_unused,
 293                 struct rte_crypto_sym_xform *xform,     void *sess)
 294 {
 295         if (unlikely(sess == NULL)) {
 296                 SNOW3G_LOG_ERR("invalid session struct");
 297                 return NULL;
 298         }
 299
 300         if (snow3g_set_session_parameters(sess, xform) != 0) {
 301                 SNOW3G_LOG_ERR("failed configure session parameters");
 302                 return NULL;
 303         }
 304
 305         return sess;
 306 }
 307
 308 /** Clear the memory of session so it doesn't leave key material behind */
 309 static void
 310 snow3g_pmd_session_clear(struct rte_cryptodev *dev __rte_unused, void *sess)
 311 {
 312         /*
 313          * Current just resetting the whole data structure, need to investigate
 314          * whether a more selective reset of key would be more performant
 315          */
 316         if (sess)
 317                 memset(sess, 0, sizeof(struct snow3g_session));
 318 }
 319
 320 struct rte_cryptodev_ops snow3g_pmd_ops = {
 321                 .dev_configure      = snow3g_pmd_config,
 322                 .dev_start          = snow3g_pmd_start,
 323                 .dev_stop           = snow3g_pmd_stop,
 324                 .dev_close          = snow3g_pmd_close,
 325
 326                 .stats_get          = snow3g_pmd_stats_get,
 327                 .stats_reset        = snow3g_pmd_stats_reset,
 328
 329                 .dev_infos_get      = snow3g_pmd_info_get,
 330
 331                 .queue_pair_setup   = snow3g_pmd_qp_setup,
 332                 .queue_pair_release = snow3g_pmd_qp_release,
 333                 .queue_pair_start   = snow3g_pmd_qp_start,
 334                 .queue_pair_stop    = snow3g_pmd_qp_stop,
 335                 .queue_pair_count   = snow3g_pmd_qp_count,
 336
 337                 .session_get_size   = snow3g_pmd_session_get_size,
 338                 .session_configure  = snow3g_pmd_session_configure,
 339                 .session_clear      = snow3g_pmd_session_clear
 340 };
 341
 342 struct rte_cryptodev_ops *rte_snow3g_pmd_ops = &snow3g_pmd_ops;