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                 struct aesni_gcm_qp *qp = dev->data->queue_pairs[qp_id];
 157
 158                 if (qp->processed_pkts)
 159                         rte_ring_free(qp->processed_pkts);
 160
 161                 rte_free(dev->data->queue_pairs[qp_id]);
 162                 dev->data->queue_pairs[qp_id] = NULL;
 163         }
 164         return 0;
 165 }
 166
 167 /** set a unique name for the queue pair based on it's name, dev_id and qp_id */
 168 static int
 169 aesni_gcm_pmd_qp_set_unique_name(struct rte_cryptodev *dev,
 170                 struct aesni_gcm_qp *qp)
 171 {
 172         unsigned n = snprintf(qp->name, sizeof(qp->name),
 173                         "aesni_gcm_pmd_%u_qp_%u",
 174                         dev->data->dev_id, qp->id);
 175
 176         if (n >= sizeof(qp->name))
 177                 return -1;
 178
 179         return 0;
 180 }
 181
 182 /** Create a ring to place process packets on */
 183 static struct rte_ring *
 184 aesni_gcm_pmd_qp_create_processed_pkts_ring(struct aesni_gcm_qp *qp,
 185                 unsigned ring_size, int socket_id)
 186 {
 187         struct rte_ring *r;
 188
 189         r = rte_ring_lookup(qp->name);
 190         if (r) {
 191                 if (rte_ring_get_size(r) >= ring_size) {
 192                         AESNI_GCM_LOG(INFO, "Reusing existing ring %s for processed"
 193                                 " packets", qp->name);
 194                         return r;
 195                 }
 196                 AESNI_GCM_LOG(ERR, "Unable to reuse existing ring %s for processed"
 197                                 " packets", qp->name);
 198                 return NULL;
 199         }
 200
 201         return rte_ring_create(qp->name, ring_size, socket_id,
 202                         RING_F_SP_ENQ | RING_F_SC_DEQ);
 203 }
 204
 205 /** Setup a queue pair */
 206 static int
 207 aesni_gcm_pmd_qp_setup(struct rte_cryptodev *dev, uint16_t qp_id,
 208                 const struct rte_cryptodev_qp_conf *qp_conf,
 209                 int socket_id, struct rte_mempool *session_pool)
 210 {
 211         struct aesni_gcm_qp *qp = NULL;
 212         struct aesni_gcm_private *internals = dev->data->dev_private;
 213
 214         /* Free memory prior to re-allocation if needed. */
 215         if (dev->data->queue_pairs[qp_id] != NULL)
 216                 aesni_gcm_pmd_qp_release(dev, qp_id);
 217
 218         /* Allocate the queue pair data structure. */
 219         qp = rte_zmalloc_socket("AES-NI PMD Queue Pair", sizeof(*qp),
 220                                         RTE_CACHE_LINE_SIZE, socket_id);
 221         if (qp == NULL)
 222                 return (-ENOMEM);
 223
 224         qp->id = qp_id;
 225         dev->data->queue_pairs[qp_id] = qp;
 226
 227         if (aesni_gcm_pmd_qp_set_unique_name(dev, qp))
 228                 goto qp_setup_cleanup;
 229
 230         qp->ops = (const struct aesni_gcm_ops *)gcm_ops[internals->vector_mode];
 231
 232         qp->processed_pkts = aesni_gcm_pmd_qp_create_processed_pkts_ring(qp,
 233                         qp_conf->nb_descriptors, socket_id);
 234         if (qp->processed_pkts == NULL)
 235                 goto qp_setup_cleanup;
 236
 237         qp->sess_mp = session_pool;
 238
 239         memset(&qp->qp_stats, 0, sizeof(qp->qp_stats));
 240
 241         return 0;
 242
 243 qp_setup_cleanup:
 244         if (qp)
 245                 rte_free(qp);
 246
 247         return -1;
 248 }
 249
 250 /** Return the number of allocated queue pairs */
 251 static uint32_t
 252 aesni_gcm_pmd_qp_count(struct rte_cryptodev *dev)
 253 {
 254         return dev->data->nb_queue_pairs;
 255 }
 256
 257 /** Returns the size of the aesni gcm session structure */
 258 static unsigned
 259 aesni_gcm_pmd_sym_session_get_size(struct rte_cryptodev *dev __rte_unused)
 260 {
 261         return sizeof(struct aesni_gcm_session);
 262 }
 263
 264 /** Configure a aesni gcm session from a crypto xform chain */
 265 static int
 266 aesni_gcm_pmd_sym_session_configure(struct rte_cryptodev *dev __rte_unused,
 267                 struct rte_crypto_sym_xform *xform,
 268                 struct rte_cryptodev_sym_session *sess,
 269                 struct rte_mempool *mempool)
 270 {
 271         void *sess_private_data;
 272         int ret;
 273         struct aesni_gcm_private *internals = dev->data->dev_private;
 274
 275         if (unlikely(sess == NULL)) {
 276                 AESNI_GCM_LOG(ERR, "invalid session struct");
 277                 return -EINVAL;
 278         }
 279
 280         if (rte_mempool_get(mempool, &sess_private_data)) {
 281                 AESNI_GCM_LOG(ERR,
 282                                 "Couldn't get object from session mempool");
 283                 return -ENOMEM;
 284         }
 285         ret = aesni_gcm_set_session_parameters(gcm_ops[internals->vector_mode],
 286                                 sess_private_data, xform);
 287         if (ret != 0) {
 288                 AESNI_GCM_LOG(ERR, "failed configure session parameters");
 289
 290                 /* Return session to mempool */
 291                 rte_mempool_put(mempool, sess_private_data);
 292                 return ret;
 293         }
 294
 295         set_sym_session_private_data(sess, dev->driver_id,
 296                         sess_private_data);
 297
 298         return 0;
 299 }
 300
 301 /** Clear the memory of session so it doesn't leave key material behind */
 302 static void
 303 aesni_gcm_pmd_sym_session_clear(struct rte_cryptodev *dev,
 304                 struct rte_cryptodev_sym_session *sess)
 305 {
 306         uint8_t index = dev->driver_id;
 307         void *sess_priv = get_sym_session_private_data(sess, index);
 308
 309         /* Zero out the whole structure */
 310         if (sess_priv) {
 311                 memset(sess_priv, 0, sizeof(struct aesni_gcm_session));
 312                 struct rte_mempool *sess_mp = rte_mempool_from_obj(sess_priv);
 313                 set_sym_session_private_data(sess, index, NULL);
 314                 rte_mempool_put(sess_mp, sess_priv);
 315         }
 316 }
 317
 318 struct rte_cryptodev_ops aesni_gcm_pmd_ops = {
 319                 .dev_configure          = aesni_gcm_pmd_config,
 320                 .dev_start              = aesni_gcm_pmd_start,
 321                 .dev_stop               = aesni_gcm_pmd_stop,
 322                 .dev_close              = aesni_gcm_pmd_close,
 323
 324                 .stats_get              = aesni_gcm_pmd_stats_get,
 325                 .stats_reset            = aesni_gcm_pmd_stats_reset,
 326
 327                 .dev_infos_get          = aesni_gcm_pmd_info_get,
 328
 329                 .queue_pair_setup       = aesni_gcm_pmd_qp_setup,
 330                 .queue_pair_release     = aesni_gcm_pmd_qp_release,
 331                 .queue_pair_count       = aesni_gcm_pmd_qp_count,
 332
 333                 .sym_session_get_size   = aesni_gcm_pmd_sym_session_get_size,
 334                 .sym_session_configure  = aesni_gcm_pmd_sym_session_configure,
 335                 .sym_session_clear      = aesni_gcm_pmd_sym_session_clear
 336 };
 337
 338 struct rte_cryptodev_ops *rte_aesni_gcm_pmd_ops = &aesni_gcm_pmd_ops;