drivers/crypto/aesni_gcm/aesni_gcm_pmd_ops.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2016 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 "aesni_gcm_pmd_private.h"
  12
  13 static const struct rte_cryptodev_capabilities aesni_gcm_pmd_capabilities[] = {
  14         {       /* AES GMAC (AUTH) */
  15                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
  16                 {.sym = {
  17                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
  18                         {.auth = {
  19                                 .algo = RTE_CRYPTO_AUTH_AES_GMAC,
  20                                 .block_size = 16,
  21                                 .key_size = {
  22                                         .min = 16,
  23                                         .max = 32,
  24                                         .increment = 8
  25                                 },
  26                                 .digest_size = {
  27                                         .min = 1,
  28                                         .max = 16,
  29                                         .increment = 1
  30                                 },
  31                                 .iv_size = {
  32                                         .min = 12,
  33                                         .max = 12,
  34                                         .increment = 0
  35                                 }
  36                         }, }
  37                 }, }
  38         },
  39         {       /* AES GCM */
  40                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
  41                 {.sym = {
  42                         .xform_type = RTE_CRYPTO_SYM_XFORM_AEAD,
  43                         {.aead = {
  44                                 .algo = RTE_CRYPTO_AEAD_AES_GCM,
  45                                 .block_size = 16,
  46                                 .key_size = {
  47                                         .min = 16,
  48                                         .max = 32,
  49                                         .increment = 8
  50                                 },
  51                                 .digest_size = {
  52                                         .min = 1,
  53                                         .max = 16,
  54                                         .increment = 1
  55                                 },
  56                                 .aad_size = {
  57                                         .min = 0,
  58                                         .max = 65535,
  59                                         .increment = 1
  60                                 },
  61                                 .iv_size = {
  62                                         .min = 12,
  63                                         .max = 12,
  64                                         .increment = 0
  65                                 }
  66                         }, }
  67                 }, }
  68         },
  69         RTE_CRYPTODEV_END_OF_CAPABILITIES_LIST()
  70 };
  71
  72 /** Configure device */
  73 static int
  74 aesni_gcm_pmd_config(__rte_unused struct rte_cryptodev *dev,
  75                 __rte_unused struct rte_cryptodev_config *config)
  76 {
  77         return 0;
  78 }
  79
  80 /** Start device */
  81 static int
  82 aesni_gcm_pmd_start(__rte_unused struct rte_cryptodev *dev)
  83 {
  84         return 0;
  85 }
  86
  87 /** Stop device */
  88 static void
  89 aesni_gcm_pmd_stop(__rte_unused struct rte_cryptodev *dev)
  90 {
  91 }
  92
  93 /** Close device */
  94 static int
  95 aesni_gcm_pmd_close(__rte_unused struct rte_cryptodev *dev)
  96 {
  97         return 0;
  98 }
  99
 100
 101 /** Get device statistics */
 102 static void
 103 aesni_gcm_pmd_stats_get(struct rte_cryptodev *dev,
 104                 struct rte_cryptodev_stats *stats)
 105 {
 106         int qp_id;
 107
 108         for (qp_id = 0; qp_id < dev->data->nb_queue_pairs; qp_id++) {
 109                 struct aesni_gcm_qp *qp = dev->data->queue_pairs[qp_id];
 110
 111                 stats->enqueued_count += qp->qp_stats.enqueued_count;
 112                 stats->dequeued_count += qp->qp_stats.dequeued_count;
 113
 114                 stats->enqueue_err_count += qp->qp_stats.enqueue_err_count;
 115                 stats->dequeue_err_count += qp->qp_stats.dequeue_err_count;
 116         }
 117 }
 118
 119 /** Reset device statistics */
 120 static void
 121 aesni_gcm_pmd_stats_reset(struct rte_cryptodev *dev)
 122 {
 123         int qp_id;
 124
 125         for (qp_id = 0; qp_id < dev->data->nb_queue_pairs; qp_id++) {
 126                 struct aesni_gcm_qp *qp = dev->data->queue_pairs[qp_id];
 127
 128                 memset(&qp->qp_stats, 0, sizeof(qp->qp_stats));
 129         }
 130 }
 131
 132
 133 /** Get device info */
 134 static void
 135 aesni_gcm_pmd_info_get(struct rte_cryptodev *dev,
 136                 struct rte_cryptodev_info *dev_info)
 137 {
 138         struct aesni_gcm_private *internals = dev->data->dev_private;
 139
 140         if (dev_info != NULL) {
 141                 dev_info->driver_id = dev->driver_id;
 142                 dev_info->feature_flags = dev->feature_flags;
 143                 dev_info->capabilities = aesni_gcm_pmd_capabilities;
 144
 145                 dev_info->max_nb_queue_pairs = internals->max_nb_queue_pairs;
 146                 /* No limit of number of sessions */
 147                 dev_info->sym.max_nb_sessions = 0;
 148         }
 149 }
 150
 151 /** Release queue pair */
 152 static int
 153 aesni_gcm_pmd_qp_release(struct rte_cryptodev *dev, uint16_t qp_id)
 154 {
 155         if (dev->data->queue_pairs[qp_id] != NULL) {
 156                 rte_free(dev->data->queue_pairs[qp_id]);
 157                 dev->data->queue_pairs[qp_id] = NULL;
 158         }
 159         return 0;
 160 }
 161
 162 /** set a unique name for the queue pair based on it's name, dev_id and qp_id */
 163 static int
 164 aesni_gcm_pmd_qp_set_unique_name(struct rte_cryptodev *dev,
 165                 struct aesni_gcm_qp *qp)
 166 {
 167         unsigned n = snprintf(qp->name, sizeof(qp->name),
 168                         "aesni_gcm_pmd_%u_qp_%u",
 169                         dev->data->dev_id, qp->id);
 170
 171         if (n >= sizeof(qp->name))
 172                 return -1;
 173
 174         return 0;
 175 }
 176
 177 /** Create a ring to place process packets on */
 178 static struct rte_ring *
 179 aesni_gcm_pmd_qp_create_processed_pkts_ring(struct aesni_gcm_qp *qp,
 180                 unsigned ring_size, int socket_id)
 181 {
 182         struct rte_ring *r;
 183
 184         r = rte_ring_lookup(qp->name);
 185         if (r) {
 186                 if (rte_ring_get_size(r) >= ring_size) {
 187                         AESNI_GCM_LOG(INFO, "Reusing existing ring %s for processed"
 188                                 " packets", qp->name);
 189                         return r;
 190                 }
 191                 AESNI_GCM_LOG(ERR, "Unable to reuse existing ring %s for processed"
 192                                 " packets", qp->name);
 193                 return NULL;
 194         }
 195
 196         return rte_ring_create(qp->name, ring_size, socket_id,
 197                         RING_F_SP_ENQ | RING_F_SC_DEQ);
 198 }
 199
 200 /** Setup a queue pair */
 201 static int
 202 aesni_gcm_pmd_qp_setup(struct rte_cryptodev *dev, uint16_t qp_id,
 203                 const struct rte_cryptodev_qp_conf *qp_conf,
 204                 int socket_id, struct rte_mempool *session_pool)
 205 {
 206         struct aesni_gcm_qp *qp = NULL;
 207         struct aesni_gcm_private *internals = dev->data->dev_private;
 208
 209         /* Free memory prior to re-allocation if needed. */
 210         if (dev->data->queue_pairs[qp_id] != NULL)
 211                 aesni_gcm_pmd_qp_release(dev, qp_id);
 212
 213         /* Allocate the queue pair data structure. */
 214         qp = rte_zmalloc_socket("AES-NI PMD Queue Pair", sizeof(*qp),
 215                                         RTE_CACHE_LINE_SIZE, socket_id);
 216         if (qp == NULL)
 217                 return (-ENOMEM);
 218
 219         qp->id = qp_id;
 220         dev->data->queue_pairs[qp_id] = qp;
 221
 222         if (aesni_gcm_pmd_qp_set_unique_name(dev, qp))
 223                 goto qp_setup_cleanup;
 224
 225         qp->ops = (const struct aesni_gcm_ops *)gcm_ops[internals->vector_mode];
 226
 227         qp->processed_pkts = aesni_gcm_pmd_qp_create_processed_pkts_ring(qp,
 228                         qp_conf->nb_descriptors, socket_id);
 229         if (qp->processed_pkts == NULL)
 230                 goto qp_setup_cleanup;
 231
 232         qp->sess_mp = session_pool;
 233
 234         memset(&qp->qp_stats, 0, sizeof(qp->qp_stats));
 235
 236         return 0;
 237
 238 qp_setup_cleanup:
 239         if (qp)
 240                 rte_free(qp);
 241
 242         return -1;
 243 }
 244
 245 /** Return the number of allocated queue pairs */
 246 static uint32_t
 247 aesni_gcm_pmd_qp_count(struct rte_cryptodev *dev)
 248 {
 249         return dev->data->nb_queue_pairs;
 250 }
 251
 252 /** Returns the size of the aesni gcm session structure */
 253 static unsigned
 254 aesni_gcm_pmd_sym_session_get_size(struct rte_cryptodev *dev __rte_unused)
 255 {
 256         return sizeof(struct aesni_gcm_session);
 257 }
 258
 259 /** Configure a aesni gcm session from a crypto xform chain */
 260 static int
 261 aesni_gcm_pmd_sym_session_configure(struct rte_cryptodev *dev __rte_unused,
 262                 struct rte_crypto_sym_xform *xform,
 263                 struct rte_cryptodev_sym_session *sess,
 264                 struct rte_mempool *mempool)
 265 {
 266         void *sess_private_data;
 267         int ret;
 268         struct aesni_gcm_private *internals = dev->data->dev_private;
 269
 270         if (unlikely(sess == NULL)) {
 271                 AESNI_GCM_LOG(ERR, "invalid session struct");
 272                 return -EINVAL;
 273         }
 274
 275         if (rte_mempool_get(mempool, &sess_private_data)) {
 276                 AESNI_GCM_LOG(ERR,
 277                                 "Couldn't get object from session mempool");
 278                 return -ENOMEM;
 279         }
 280         ret = aesni_gcm_set_session_parameters(gcm_ops[internals->vector_mode],
 281                                 sess_private_data, xform);
 282         if (ret != 0) {
 283                 AESNI_GCM_LOG(ERR, "failed configure session parameters");
 284
 285                 /* Return session to mempool */
 286                 rte_mempool_put(mempool, sess_private_data);
 287                 return ret;
 288         }
 289
 290         set_sym_session_private_data(sess, dev->driver_id,
 291                         sess_private_data);
 292
 293         return 0;
 294 }
 295
 296 /** Clear the memory of session so it doesn't leave key material behind */
 297 static void
 298 aesni_gcm_pmd_sym_session_clear(struct rte_cryptodev *dev,
 299                 struct rte_cryptodev_sym_session *sess)
 300 {
 301         uint8_t index = dev->driver_id;
 302         void *sess_priv = get_sym_session_private_data(sess, index);
 303
 304         /* Zero out the whole structure */
 305         if (sess_priv) {
 306                 memset(sess_priv, 0, sizeof(struct aesni_gcm_session));
 307                 struct rte_mempool *sess_mp = rte_mempool_from_obj(sess_priv);
 308                 set_sym_session_private_data(sess, index, NULL);
 309                 rte_mempool_put(sess_mp, sess_priv);
 310         }
 311 }
 312
 313 struct rte_cryptodev_ops aesni_gcm_pmd_ops = {
 314                 .dev_configure          = aesni_gcm_pmd_config,
 315                 .dev_start              = aesni_gcm_pmd_start,
 316                 .dev_stop               = aesni_gcm_pmd_stop,
 317                 .dev_close              = aesni_gcm_pmd_close,
 318
 319                 .stats_get              = aesni_gcm_pmd_stats_get,
 320                 .stats_reset            = aesni_gcm_pmd_stats_reset,
 321
 322                 .dev_infos_get          = aesni_gcm_pmd_info_get,
 323
 324                 .queue_pair_setup       = aesni_gcm_pmd_qp_setup,
 325                 .queue_pair_release     = aesni_gcm_pmd_qp_release,
 326                 .queue_pair_count       = aesni_gcm_pmd_qp_count,
 327
 328                 .sym_session_get_size   = aesni_gcm_pmd_sym_session_get_size,
 329                 .sym_session_configure  = aesni_gcm_pmd_sym_session_configure,
 330                 .sym_session_clear      = aesni_gcm_pmd_sym_session_clear
 331 };
 332
 333 struct rte_cryptodev_ops *rte_aesni_gcm_pmd_ops = &aesni_gcm_pmd_ops;