LXR dpdk/drivers/crypto/armv8/rte_armv8_pmd

   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 <rte_cryptodev_pmd.h>
  10
  11#include "armv8_pmd_private.h"
  12
  13static 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 */
  83static int
  84armv8_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 */
  91static int
  92armv8_crypto_pmd_start(__rte_unused struct rte_cryptodev *dev)
  93{
  94        return 0;
  95}
  96
  97/** Stop device */
  98static void
  99armv8_crypto_pmd_stop(__rte_unused struct rte_cryptodev *dev)
 100{
 101}
 102
 103/** Close device */
 104static int
 105armv8_crypto_pmd_close(__rte_unused struct rte_cryptodev *dev)
 106{
 107        return 0;
 108}
 109
 110
 111/** Get device statistics */
 112static void
 113armv8_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 */
 130static void
 131armv8_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 */
 144static void
 145armv8_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 */
 161static int
 162armv8_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 */
 174static int
 175armv8_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 */
 191static struct rte_ring *
 192armv8_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 */
 218static int
 219armv8_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
 253qp_setup_cleanup:
 254        if (qp)
 255                rte_free(qp);
 256
 257        return -1;
 258}
 259
 260/** Returns the size of the session structure */
 261static unsigned
 262armv8_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 */
 268static int
 269armv8_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 */
 304static void
 305armv8_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
 320struct 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
 339struct rte_cryptodev_ops *rte_armv8_crypto_pmd_ops = &armv8_crypto_pmd_ops;
 340