drivers/crypto/snow3g/rte_snow3g_pmd_ops.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2016-2018 Intel Corporation
   3  */
   4
   5 #include <string.h>
   6
   7 #include <rte_common.h>
   8 #include <rte_malloc.h>
   9 #include <rte_cryptodev_pmd.h>
  10
  11 #include "rte_snow3g_pmd_private.h"
  12
  13 static const struct rte_cryptodev_capabilities snow3g_pmd_capabilities[] = {
  14         {       /* SNOW 3G (UIA2) */
  15                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
  16                 {.sym = {
  17                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
  18                         {.auth = {
  19                                 .algo = RTE_CRYPTO_AUTH_SNOW3G_UIA2,
  20                                 .block_size = 16,
  21                                 .key_size = {
  22                                         .min = 16,
  23                                         .max = 16,
  24                                         .increment = 0
  25                                 },
  26                                 .digest_size = {
  27                                         .min = 4,
  28                                         .max = 4,
  29                                         .increment = 0
  30                                 },
  31                                 .iv_size = {
  32                                         .min = 16,
  33                                         .max = 16,
  34                                         .increment = 0
  35                                 }
  36                         }, }
  37                 }, }
  38         },
  39         {       /* SNOW 3G (UEA2) */
  40                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
  41                 {.sym = {
  42                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
  43                         {.cipher = {
  44                                 .algo = RTE_CRYPTO_CIPHER_SNOW3G_UEA2,
  45                                 .block_size = 16,
  46                                 .key_size = {
  47                                         .min = 16,
  48                                         .max = 16,
  49                                         .increment = 0
  50                                 },
  51                                 .iv_size = {
  52                                         .min = 16,
  53                                         .max = 16,
  54                                         .increment = 0
  55                                 }
  56                         }, }
  57                 }, }
  58         },
  59         RTE_CRYPTODEV_END_OF_CAPABILITIES_LIST()
  60 };
  61
  62 /** Configure device */
  63 static int
  64 snow3g_pmd_config(__rte_unused struct rte_cryptodev *dev,
  65                 __rte_unused struct rte_cryptodev_config *config)
  66 {
  67         return 0;
  68 }
  69
  70 /** Start device */
  71 static int
  72 snow3g_pmd_start(__rte_unused struct rte_cryptodev *dev)
  73 {
  74         return 0;
  75 }
  76
  77 /** Stop device */
  78 static void
  79 snow3g_pmd_stop(__rte_unused struct rte_cryptodev *dev)
  80 {
  81 }
  82
  83 /** Close device */
  84 static int
  85 snow3g_pmd_close(__rte_unused struct rte_cryptodev *dev)
  86 {
  87         return 0;
  88 }
  89
  90
  91 /** Get device statistics */
  92 static void
  93 snow3g_pmd_stats_get(struct rte_cryptodev *dev,
  94                 struct rte_cryptodev_stats *stats)
  95 {
  96         int qp_id;
  97
  98         for (qp_id = 0; qp_id < dev->data->nb_queue_pairs; qp_id++) {
  99                 struct snow3g_qp *qp = dev->data->queue_pairs[qp_id];
 100
 101                 stats->enqueued_count += qp->qp_stats.enqueued_count;
 102                 stats->dequeued_count += qp->qp_stats.dequeued_count;
 103
 104                 stats->enqueue_err_count += qp->qp_stats.enqueue_err_count;
 105                 stats->dequeue_err_count += qp->qp_stats.dequeue_err_count;
 106         }
 107 }
 108
 109 /** Reset device statistics */
 110 static void
 111 snow3g_pmd_stats_reset(struct rte_cryptodev *dev)
 112 {
 113         int qp_id;
 114
 115         for (qp_id = 0; qp_id < dev->data->nb_queue_pairs; qp_id++) {
 116                 struct snow3g_qp *qp = dev->data->queue_pairs[qp_id];
 117
 118                 memset(&qp->qp_stats, 0, sizeof(qp->qp_stats));
 119         }
 120 }
 121
 122
 123 /** Get device info */
 124 static void
 125 snow3g_pmd_info_get(struct rte_cryptodev *dev,
 126                 struct rte_cryptodev_info *dev_info)
 127 {
 128         struct snow3g_private *internals = dev->data->dev_private;
 129
 130         if (dev_info != NULL) {
 131                 dev_info->driver_id = dev->driver_id;
 132                 dev_info->max_nb_queue_pairs = internals->max_nb_queue_pairs;
 133                 /* No limit of number of sessions */
 134                 dev_info->sym.max_nb_sessions = 0;
 135                 dev_info->feature_flags = dev->feature_flags;
 136                 dev_info->capabilities = snow3g_pmd_capabilities;
 137         }
 138 }
 139
 140 /** Release queue pair */
 141 static int
 142 snow3g_pmd_qp_release(struct rte_cryptodev *dev, uint16_t qp_id)
 143 {
 144         if (dev->data->queue_pairs[qp_id] != NULL) {
 145                 struct snow3g_qp *qp = dev->data->queue_pairs[qp_id];
 146
 147                 if (qp->processed_ops)
 148                         rte_ring_free(qp->processed_ops);
 149
 150                 rte_free(dev->data->queue_pairs[qp_id]);
 151                 dev->data->queue_pairs[qp_id] = NULL;
 152         }
 153         return 0;
 154 }
 155
 156 /** set a unique name for the queue pair based on its name, dev_id and qp_id */
 157 static int
 158 snow3g_pmd_qp_set_unique_name(struct rte_cryptodev *dev,
 159                 struct snow3g_qp *qp)
 160 {
 161         unsigned n = snprintf(qp->name, sizeof(qp->name),
 162                         "snow3g_pmd_%u_qp_%u",
 163                         dev->data->dev_id, qp->id);
 164
 165         if (n >= sizeof(qp->name))
 166                 return -1;
 167
 168         return 0;
 169 }
 170
 171 /** Create a ring to place processed ops on */
 172 static struct rte_ring *
 173 snow3g_pmd_qp_create_processed_ops_ring(struct snow3g_qp *qp,
 174                 unsigned ring_size, int socket_id)
 175 {
 176         struct rte_ring *r;
 177
 178         r = rte_ring_lookup(qp->name);
 179         if (r) {
 180                 if (rte_ring_get_size(r) >= ring_size) {
 181                         SNOW3G_LOG(INFO, "Reusing existing ring %s"
 182                                         " for processed packets",
 183                                          qp->name);
 184                         return r;
 185                 }
 186
 187                 SNOW3G_LOG(ERR, "Unable to reuse existing ring %s"
 188                                 " for processed packets",
 189                                  qp->name);
 190                 return NULL;
 191         }
 192
 193         return rte_ring_create(qp->name, ring_size, socket_id,
 194                         RING_F_SP_ENQ | RING_F_SC_DEQ);
 195 }
 196
 197 /** Setup a queue pair */
 198 static int
 199 snow3g_pmd_qp_setup(struct rte_cryptodev *dev, uint16_t qp_id,
 200                 const struct rte_cryptodev_qp_conf *qp_conf,
 201                 int socket_id, struct rte_mempool *session_pool)
 202 {
 203         struct snow3g_qp *qp = NULL;
 204
 205         /* Free memory prior to re-allocation if needed. */
 206         if (dev->data->queue_pairs[qp_id] != NULL)
 207                 snow3g_pmd_qp_release(dev, qp_id);
 208
 209         /* Allocate the queue pair data structure. */
 210         qp = rte_zmalloc_socket("SNOW 3G PMD Queue Pair", sizeof(*qp),
 211                                         RTE_CACHE_LINE_SIZE, socket_id);
 212         if (qp == NULL)
 213                 return (-ENOMEM);
 214
 215         qp->id = qp_id;
 216         dev->data->queue_pairs[qp_id] = qp;
 217
 218         if (snow3g_pmd_qp_set_unique_name(dev, qp))
 219                 goto qp_setup_cleanup;
 220
 221         qp->processed_ops = snow3g_pmd_qp_create_processed_ops_ring(qp,
 222                         qp_conf->nb_descriptors, socket_id);
 223         if (qp->processed_ops == NULL)
 224                 goto qp_setup_cleanup;
 225
 226         qp->sess_mp = session_pool;
 227
 228         memset(&qp->qp_stats, 0, sizeof(qp->qp_stats));
 229
 230         return 0;
 231
 232 qp_setup_cleanup:
 233         if (qp)
 234                 rte_free(qp);
 235
 236         return -1;
 237 }
 238
 239 /** Return the number of allocated queue pairs */
 240 static uint32_t
 241 snow3g_pmd_qp_count(struct rte_cryptodev *dev)
 242 {
 243         return dev->data->nb_queue_pairs;
 244 }
 245
 246 /** Returns the size of the SNOW 3G session structure */
 247 static unsigned
 248 snow3g_pmd_sym_session_get_size(struct rte_cryptodev *dev __rte_unused)
 249 {
 250         return sizeof(struct snow3g_session);
 251 }
 252
 253 /** Configure a SNOW 3G session from a crypto xform chain */
 254 static int
 255 snow3g_pmd_sym_session_configure(struct rte_cryptodev *dev __rte_unused,
 256                 struct rte_crypto_sym_xform *xform,
 257                 struct rte_cryptodev_sym_session *sess,
 258                 struct rte_mempool *mempool)
 259 {
 260         void *sess_private_data;
 261         int ret;
 262
 263         if (unlikely(sess == NULL)) {
 264                 SNOW3G_LOG(ERR, "invalid session struct");
 265                 return -EINVAL;
 266         }
 267
 268         if (rte_mempool_get(mempool, &sess_private_data)) {
 269                 SNOW3G_LOG(ERR,
 270                         "Couldn't get object from session mempool");
 271                 return -ENOMEM;
 272         }
 273
 274         ret = snow3g_set_session_parameters(sess_private_data, xform);
 275         if (ret != 0) {
 276                 SNOW3G_LOG(ERR, "failed configure session parameters");
 277
 278                 /* Return session to mempool */
 279                 rte_mempool_put(mempool, sess_private_data);
 280                 return ret;
 281         }
 282
 283         set_sym_session_private_data(sess, dev->driver_id,
 284                 sess_private_data);
 285
 286         return 0;
 287 }
 288
 289 /** Clear the memory of session so it doesn't leave key material behind */
 290 static void
 291 snow3g_pmd_sym_session_clear(struct rte_cryptodev *dev,
 292                 struct rte_cryptodev_sym_session *sess)
 293 {
 294         uint8_t index = dev->driver_id;
 295         void *sess_priv = get_sym_session_private_data(sess, index);
 296
 297         /* Zero out the whole structure */
 298         if (sess_priv) {
 299                 memset(sess_priv, 0, sizeof(struct snow3g_session));
 300                 struct rte_mempool *sess_mp = rte_mempool_from_obj(sess_priv);
 301                 set_sym_session_private_data(sess, index, NULL);
 302                 rte_mempool_put(sess_mp, sess_priv);
 303         }
 304 }
 305
 306 struct rte_cryptodev_ops snow3g_pmd_ops = {
 307                 .dev_configure      = snow3g_pmd_config,
 308                 .dev_start          = snow3g_pmd_start,
 309                 .dev_stop           = snow3g_pmd_stop,
 310                 .dev_close          = snow3g_pmd_close,
 311
 312                 .stats_get          = snow3g_pmd_stats_get,
 313                 .stats_reset        = snow3g_pmd_stats_reset,
 314
 315                 .dev_infos_get      = snow3g_pmd_info_get,
 316
 317                 .queue_pair_setup   = snow3g_pmd_qp_setup,
 318                 .queue_pair_release = snow3g_pmd_qp_release,
 319                 .queue_pair_count   = snow3g_pmd_qp_count,
 320
 321                 .sym_session_get_size   = snow3g_pmd_sym_session_get_size,
 322                 .sym_session_configure  = snow3g_pmd_sym_session_configure,
 323                 .sym_session_clear      = snow3g_pmd_sym_session_clear
 324 };
 325
 326 struct rte_cryptodev_ops *rte_snow3g_pmd_ops = &snow3g_pmd_ops;