drivers/crypto/armv8/rte_armv8_pmd_ops.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2017 Cavium, Inc
   3  */
   4
   5 #include <string.h>
   6
   7 #include <rte_common.h>
   8 #include <rte_malloc.h>
   9 #include <cryptodev_pmd.h>
  10
  11 #include "armv8_pmd_private.h"
  12
  13 static const struct rte_cryptodev_capabilities
  14         armv8_crypto_pmd_capabilities[] = {
  15         {       /* SHA1 HMAC */
  16                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
  17                         {.sym = {
  18                                 .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
  19                                 {.auth = {
  20                                         .algo = RTE_CRYPTO_AUTH_SHA1_HMAC,
  21                                         .block_size = 64,
  22                                         .key_size = {
  23                                                 .min = 1,
  24                                                 .max = 64,
  25                                                 .increment = 1
  26                                         },
  27                                         .digest_size = {
  28                                                 .min = 1,
  29                                                 .max = 20,
  30                                                 .increment = 1
  31                                         },
  32                                         .iv_size = { 0 }
  33                                 }, }
  34                         }, }
  35         },
  36         {       /* SHA256 HMAC */
  37                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
  38                         {.sym = {
  39                                 .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
  40                                 {.auth = {
  41                                         .algo = RTE_CRYPTO_AUTH_SHA256_HMAC,
  42                                         .block_size = 64,
  43                                         .key_size = {
  44                                                 .min = 1,
  45                                                 .max = 64,
  46                                                 .increment = 1
  47                                         },
  48                                         .digest_size = {
  49                                                 .min = 1,
  50                                                 .max = 32,
  51                                                 .increment = 1
  52                                         },
  53                                         .iv_size = { 0 }
  54                                 }, }
  55                         }, }
  56         },
  57         {       /* AES CBC */
  58                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
  59                         {.sym = {
  60                                 .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
  61                                 {.cipher = {
  62                                         .algo = RTE_CRYPTO_CIPHER_AES_CBC,
  63                                         .block_size = 16,
  64                                         .key_size = {
  65                                                 .min = 16,
  66                                                 .max = 16,
  67                                                 .increment = 0
  68                                         },
  69                                         .iv_size = {
  70                                                 .min = 16,
  71                                                 .max = 16,
  72                                                 .increment = 0
  73                                         }
  74                                 }, }
  75                         }, }
  76         },
  77
  78         RTE_CRYPTODEV_END_OF_CAPABILITIES_LIST()
  79 };
  80
  81
  82 /** Configure device */
  83 static int
  84 armv8_crypto_pmd_config(__rte_unused struct rte_cryptodev *dev,
  85                 __rte_unused struct rte_cryptodev_config *config)
  86 {
  87         return 0;
  88 }
  89
  90 /** Start device */
  91 static int
  92 armv8_crypto_pmd_start(__rte_unused struct rte_cryptodev *dev)
  93 {
  94         return 0;
  95 }
  96
  97 /** Stop device */
  98 static void
  99 armv8_crypto_pmd_stop(__rte_unused struct rte_cryptodev *dev)
 100 {
 101 }
 102
 103 /** Close device */
 104 static int
 105 armv8_crypto_pmd_close(__rte_unused struct rte_cryptodev *dev)
 106 {
 107         return 0;
 108 }
 109
 110
 111 /** Get device statistics */
 112 static void
 113 armv8_crypto_pmd_stats_get(struct rte_cryptodev *dev,
 114                 struct rte_cryptodev_stats *stats)
 115 {
 116         int qp_id;
 117
 118         for (qp_id = 0; qp_id < dev->data->nb_queue_pairs; qp_id++) {
 119                 struct armv8_crypto_qp *qp = dev->data->queue_pairs[qp_id];
 120
 121                 stats->enqueued_count += qp->stats.enqueued_count;
 122                 stats->dequeued_count += qp->stats.dequeued_count;
 123
 124                 stats->enqueue_err_count += qp->stats.enqueue_err_count;
 125                 stats->dequeue_err_count += qp->stats.dequeue_err_count;
 126         }
 127 }
 128
 129 /** Reset device statistics */
 130 static void
 131 armv8_crypto_pmd_stats_reset(struct rte_cryptodev *dev)
 132 {
 133         int qp_id;
 134
 135         for (qp_id = 0; qp_id < dev->data->nb_queue_pairs; qp_id++) {
 136                 struct armv8_crypto_qp *qp = dev->data->queue_pairs[qp_id];
 137
 138                 memset(&qp->stats, 0, sizeof(qp->stats));
 139         }
 140 }
 141
 142
 143 /** Get device info */
 144 static void
 145 armv8_crypto_pmd_info_get(struct rte_cryptodev *dev,
 146                 struct rte_cryptodev_info *dev_info)
 147 {
 148         struct armv8_crypto_private *internals = dev->data->dev_private;
 149
 150         if (dev_info != NULL) {
 151                 dev_info->driver_id = dev->driver_id;
 152                 dev_info->feature_flags = dev->feature_flags;
 153                 dev_info->capabilities = armv8_crypto_pmd_capabilities;
 154                 dev_info->max_nb_queue_pairs = internals->max_nb_qpairs;
 155                 /* No limit of number of sessions */
 156                 dev_info->sym.max_nb_sessions = 0;
 157         }
 158 }
 159
 160 /** Release queue pair */
 161 static int
 162 armv8_crypto_pmd_qp_release(struct rte_cryptodev *dev, uint16_t qp_id)
 163 {
 164
 165         if (dev->data->queue_pairs[qp_id] != NULL) {
 166                 rte_free(dev->data->queue_pairs[qp_id]);
 167                 dev->data->queue_pairs[qp_id] = NULL;
 168         }
 169
 170         return 0;
 171 }
 172
 173 /** set a unique name for the queue pair based on it's name, dev_id and qp_id */
 174 static int
 175 armv8_crypto_pmd_qp_set_unique_name(struct rte_cryptodev *dev,
 176                 struct armv8_crypto_qp *qp)
 177 {
 178         unsigned int n;
 179
 180         n = snprintf(qp->name, sizeof(qp->name), "armv8_crypto_pmd_%u_qp_%u",
 181                         dev->data->dev_id, qp->id);
 182
 183         if (n >= sizeof(qp->name))
 184                 return -1;
 185
 186         return 0;
 187 }
 188
 189
 190 /** Create a ring to place processed operations on */
 191 static struct rte_ring *
 192 armv8_crypto_pmd_qp_create_processed_ops_ring(struct armv8_crypto_qp *qp,
 193                 unsigned int ring_size, int socket_id)
 194 {
 195         struct rte_ring *r;
 196
 197         r = rte_ring_lookup(qp->name);
 198         if (r) {
 199                 if (rte_ring_get_size(r) >= ring_size) {
 200                         ARMV8_CRYPTO_LOG_INFO(
 201                                 "Reusing existing ring %s for processed ops",
 202                                  qp->name);
 203                         return r;
 204                 }
 205
 206                 ARMV8_CRYPTO_LOG_ERR(
 207                         "Unable to reuse existing ring %s for processed ops",
 208                          qp->name);
 209                 return NULL;
 210         }
 211
 212         return rte_ring_create(qp->name, ring_size, socket_id,
 213                         RING_F_SP_ENQ | RING_F_SC_DEQ);
 214 }
 215
 216
 217 /** Setup a queue pair */
 218 static int
 219 armv8_crypto_pmd_qp_setup(struct rte_cryptodev *dev, uint16_t qp_id,
 220                 const struct rte_cryptodev_qp_conf *qp_conf,
 221                 int socket_id)
 222 {
 223         struct armv8_crypto_qp *qp = NULL;
 224
 225         /* Free memory prior to re-allocation if needed. */
 226         if (dev->data->queue_pairs[qp_id] != NULL)
 227                 armv8_crypto_pmd_qp_release(dev, qp_id);
 228
 229         /* Allocate the queue pair data structure. */
 230         qp = rte_zmalloc_socket("ARMv8 PMD Queue Pair", sizeof(*qp),
 231                                         RTE_CACHE_LINE_SIZE, socket_id);
 232         if (qp == NULL)
 233                 return -ENOMEM;
 234
 235         qp->id = qp_id;
 236         dev->data->queue_pairs[qp_id] = qp;
 237
 238         if (armv8_crypto_pmd_qp_set_unique_name(dev, qp) != 0)
 239                 goto qp_setup_cleanup;
 240
 241         qp->processed_ops = armv8_crypto_pmd_qp_create_processed_ops_ring(qp,
 242                         qp_conf->nb_descriptors, socket_id);
 243         if (qp->processed_ops == NULL)
 244                 goto qp_setup_cleanup;
 245
 246         qp->sess_mp = qp_conf->mp_session;
 247         qp->sess_mp_priv = qp_conf->mp_session_private;
 248
 249         memset(&qp->stats, 0, sizeof(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 /** Returns the size of the session structure */
 261 static unsigned
 262 armv8_crypto_pmd_sym_session_get_size(struct rte_cryptodev *dev __rte_unused)
 263 {
 264         return sizeof(struct armv8_crypto_session);
 265 }
 266
 267 /** Configure the session from a crypto xform chain */
 268 static int
 269 armv8_crypto_pmd_sym_session_configure(struct rte_cryptodev *dev,
 270                 struct rte_crypto_sym_xform *xform,
 271                 struct rte_cryptodev_sym_session *sess,
 272                 struct rte_mempool *mempool)
 273 {
 274         void *sess_private_data;
 275         int ret;
 276
 277         if (unlikely(sess == NULL)) {
 278                 ARMV8_CRYPTO_LOG_ERR("invalid session struct");
 279                 return -EINVAL;
 280         }
 281
 282         if (rte_mempool_get(mempool, &sess_private_data)) {
 283                 CDEV_LOG_ERR(
 284                         "Couldn't get object from session mempool");
 285                 return -ENOMEM;
 286         }
 287
 288         ret = armv8_crypto_set_session_parameters(sess_private_data, xform);
 289         if (ret != 0) {
 290                 ARMV8_CRYPTO_LOG_ERR("failed configure session parameters");
 291
 292                 /* Return session to mempool */
 293                 rte_mempool_put(mempool, sess_private_data);
 294                 return ret;
 295         }
 296
 297         set_sym_session_private_data(sess, dev->driver_id,
 298                         sess_private_data);
 299
 300         return 0;
 301 }
 302
 303 /** Clear the memory of session so it doesn't leave key material behind */
 304 static void
 305 armv8_crypto_pmd_sym_session_clear(struct rte_cryptodev *dev,
 306                 struct rte_cryptodev_sym_session *sess)
 307 {
 308         uint8_t index = dev->driver_id;
 309         void *sess_priv = get_sym_session_private_data(sess, index);
 310
 311         /* Zero out the whole structure */
 312         if (sess_priv) {
 313                 memset(sess_priv, 0, sizeof(struct armv8_crypto_session));
 314                 struct rte_mempool *sess_mp = rte_mempool_from_obj(sess_priv);
 315                 set_sym_session_private_data(sess, index, NULL);
 316                 rte_mempool_put(sess_mp, sess_priv);
 317         }
 318 }
 319
 320 struct rte_cryptodev_ops armv8_crypto_pmd_ops = {
 321                 .dev_configure          = armv8_crypto_pmd_config,
 322                 .dev_start              = armv8_crypto_pmd_start,
 323                 .dev_stop               = armv8_crypto_pmd_stop,
 324                 .dev_close              = armv8_crypto_pmd_close,
 325
 326                 .stats_get              = armv8_crypto_pmd_stats_get,
 327                 .stats_reset            = armv8_crypto_pmd_stats_reset,
 328
 329                 .dev_infos_get          = armv8_crypto_pmd_info_get,
 330
 331                 .queue_pair_setup       = armv8_crypto_pmd_qp_setup,
 332                 .queue_pair_release     = armv8_crypto_pmd_qp_release,
 333
 334                 .sym_session_get_size   = armv8_crypto_pmd_sym_session_get_size,
 335                 .sym_session_configure  = armv8_crypto_pmd_sym_session_configure,
 336                 .sym_session_clear      = armv8_crypto_pmd_sym_session_clear
 337 };
 338
 339 struct rte_cryptodev_ops *rte_armv8_crypto_pmd_ops = &armv8_crypto_pmd_ops;