lib/librte_vhost/vhost_crypto.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2017-2018 Intel Corporation
   3  */
   4 #include <rte_malloc.h>
   5 #include <rte_hash.h>
   6 #include <rte_jhash.h>
   7 #include <rte_mbuf.h>
   8 #include <rte_cryptodev.h>
   9
  10 #include "rte_vhost_crypto.h"
  11 #include "vhost.h"
  12 #include "vhost_user.h"
  13 #include "virtio_crypto.h"
  14
  15 #define INHDR_LEN               (sizeof(struct virtio_crypto_inhdr))
  16 #define IV_OFFSET               (sizeof(struct rte_crypto_op) + \
  17                                 sizeof(struct rte_crypto_sym_op))
  18
  19 #ifdef RTE_LIBRTE_VHOST_DEBUG
  20 #define VC_LOG_ERR(fmt, args...)                                \
  21         RTE_LOG(ERR, USER1, "[%s] %s() line %u: " fmt "\n",     \
  22                 "Vhost-Crypto", __func__, __LINE__, ## args)
  23 #define VC_LOG_INFO(fmt, args...)                               \
  24         RTE_LOG(INFO, USER1, "[%s] %s() line %u: " fmt "\n",    \
  25                 "Vhost-Crypto", __func__, __LINE__, ## args)
  26
  27 #define VC_LOG_DBG(fmt, args...)                                \
  28         RTE_LOG(DEBUG, USER1, "[%s] %s() line %u: " fmt "\n",   \
  29                 "Vhost-Crypto", __func__, __LINE__, ## args)
  30 #else
  31 #define VC_LOG_ERR(fmt, args...)                                \
  32         RTE_LOG(ERR, USER1, "[VHOST-Crypto]: " fmt "\n", ## args)
  33 #define VC_LOG_INFO(fmt, args...)                               \
  34         RTE_LOG(INFO, USER1, "[VHOST-Crypto]: " fmt "\n", ## args)
  35 #define VC_LOG_DBG(fmt, args...)
  36 #endif
  37
  38 #define VIRTIO_CRYPTO_FEATURES ((1 << VIRTIO_F_NOTIFY_ON_EMPTY) |       \
  39                 (1 << VIRTIO_RING_F_INDIRECT_DESC) |                    \
  40                 (1 << VIRTIO_RING_F_EVENT_IDX) |                        \
  41                 (1 << VIRTIO_CRYPTO_SERVICE_CIPHER) |                   \
  42                 (1 << VIRTIO_CRYPTO_SERVICE_MAC) |                      \
  43                 (1 << VIRTIO_NET_F_CTRL_VQ))
  44
  45 #define IOVA_TO_VVA(t, r, a, l, p)                                      \
  46         ((t)(uintptr_t)vhost_iova_to_vva(r->dev, r->vq, a, l, p))
  47
  48 static int
  49 cipher_algo_transform(uint32_t virtio_cipher_algo)
  50 {
  51         int ret;
  52
  53         switch (virtio_cipher_algo) {
  54         case VIRTIO_CRYPTO_CIPHER_AES_CBC:
  55                 ret = RTE_CRYPTO_CIPHER_AES_CBC;
  56                 break;
  57         case VIRTIO_CRYPTO_CIPHER_AES_CTR:
  58                 ret = RTE_CRYPTO_CIPHER_AES_CTR;
  59                 break;
  60         case VIRTIO_CRYPTO_CIPHER_DES_ECB:
  61                 ret = -VIRTIO_CRYPTO_NOTSUPP;
  62                 break;
  63         case VIRTIO_CRYPTO_CIPHER_DES_CBC:
  64                 ret = RTE_CRYPTO_CIPHER_DES_CBC;
  65                 break;
  66         case VIRTIO_CRYPTO_CIPHER_3DES_ECB:
  67                 ret = RTE_CRYPTO_CIPHER_3DES_ECB;
  68                 break;
  69         case VIRTIO_CRYPTO_CIPHER_3DES_CBC:
  70                 ret = RTE_CRYPTO_CIPHER_3DES_CBC;
  71                 break;
  72         case VIRTIO_CRYPTO_CIPHER_3DES_CTR:
  73                 ret = RTE_CRYPTO_CIPHER_3DES_CTR;
  74                 break;
  75         case VIRTIO_CRYPTO_CIPHER_KASUMI_F8:
  76                 ret = RTE_CRYPTO_CIPHER_KASUMI_F8;
  77                 break;
  78         case VIRTIO_CRYPTO_CIPHER_SNOW3G_UEA2:
  79                 ret = RTE_CRYPTO_CIPHER_SNOW3G_UEA2;
  80                 break;
  81         case VIRTIO_CRYPTO_CIPHER_AES_F8:
  82                 ret = RTE_CRYPTO_CIPHER_AES_F8;
  83                 break;
  84         case VIRTIO_CRYPTO_CIPHER_AES_XTS:
  85                 ret = RTE_CRYPTO_CIPHER_AES_XTS;
  86                 break;
  87         case VIRTIO_CRYPTO_CIPHER_ZUC_EEA3:
  88                 ret = RTE_CRYPTO_CIPHER_ZUC_EEA3;
  89                 break;
  90         default:
  91                 ret = -VIRTIO_CRYPTO_BADMSG;
  92                 break;
  93         }
  94
  95         return ret;
  96 }
  97
  98 static int
  99 auth_algo_transform(uint32_t virtio_auth_algo)
 100 {
 101         int ret;
 102
 103         switch (virtio_auth_algo) {
 104
 105         case VIRTIO_CRYPTO_NO_MAC:
 106                 ret = RTE_CRYPTO_AUTH_NULL;
 107                 break;
 108         case VIRTIO_CRYPTO_MAC_HMAC_MD5:
 109                 ret = RTE_CRYPTO_AUTH_MD5_HMAC;
 110                 break;
 111         case VIRTIO_CRYPTO_MAC_HMAC_SHA1:
 112                 ret = RTE_CRYPTO_AUTH_SHA1_HMAC;
 113                 break;
 114         case VIRTIO_CRYPTO_MAC_HMAC_SHA_224:
 115                 ret = RTE_CRYPTO_AUTH_SHA224_HMAC;
 116                 break;
 117         case VIRTIO_CRYPTO_MAC_HMAC_SHA_256:
 118                 ret = RTE_CRYPTO_AUTH_SHA256_HMAC;
 119                 break;
 120         case VIRTIO_CRYPTO_MAC_HMAC_SHA_384:
 121                 ret = RTE_CRYPTO_AUTH_SHA384_HMAC;
 122                 break;
 123         case VIRTIO_CRYPTO_MAC_HMAC_SHA_512:
 124                 ret = RTE_CRYPTO_AUTH_SHA512_HMAC;
 125                 break;
 126         case VIRTIO_CRYPTO_MAC_CMAC_3DES:
 127                 ret = -VIRTIO_CRYPTO_NOTSUPP;
 128                 break;
 129         case VIRTIO_CRYPTO_MAC_CMAC_AES:
 130                 ret = RTE_CRYPTO_AUTH_AES_CMAC;
 131                 break;
 132         case VIRTIO_CRYPTO_MAC_KASUMI_F9:
 133                 ret = RTE_CRYPTO_AUTH_KASUMI_F9;
 134                 break;
 135         case VIRTIO_CRYPTO_MAC_SNOW3G_UIA2:
 136                 ret = RTE_CRYPTO_AUTH_SNOW3G_UIA2;
 137                 break;
 138         case VIRTIO_CRYPTO_MAC_GMAC_AES:
 139                 ret = RTE_CRYPTO_AUTH_AES_GMAC;
 140                 break;
 141         case VIRTIO_CRYPTO_MAC_GMAC_TWOFISH:
 142                 ret = -VIRTIO_CRYPTO_NOTSUPP;
 143                 break;
 144         case VIRTIO_CRYPTO_MAC_CBCMAC_AES:
 145                 ret = RTE_CRYPTO_AUTH_AES_CBC_MAC;
 146                 break;
 147         case VIRTIO_CRYPTO_MAC_CBCMAC_KASUMI_F9:
 148                 ret = -VIRTIO_CRYPTO_NOTSUPP;
 149                 break;
 150         case VIRTIO_CRYPTO_MAC_XCBC_AES:
 151                 ret = RTE_CRYPTO_AUTH_AES_XCBC_MAC;
 152                 break;
 153         default:
 154                 ret = -VIRTIO_CRYPTO_BADMSG;
 155                 break;
 156         }
 157
 158         return ret;
 159 }
 160
 161 static int get_iv_len(enum rte_crypto_cipher_algorithm algo)
 162 {
 163         int len;
 164
 165         switch (algo) {
 166         case RTE_CRYPTO_CIPHER_3DES_CBC:
 167                 len = 8;
 168                 break;
 169         case RTE_CRYPTO_CIPHER_3DES_CTR:
 170                 len = 8;
 171                 break;
 172         case RTE_CRYPTO_CIPHER_3DES_ECB:
 173                 len = 8;
 174                 break;
 175         case RTE_CRYPTO_CIPHER_AES_CBC:
 176                 len = 16;
 177                 break;
 178
 179         /* TODO: add common algos */
 180
 181         default:
 182                 len = -1;
 183                 break;
 184         }
 185
 186         return len;
 187 }
 188
 189 /**
 190  * vhost_crypto struct is used to maintain a number of virtio_cryptos and
 191  * one DPDK crypto device that deals with all crypto workloads. It is declared
 192  * here and defined in vhost_crypto.c
 193  */
 194 struct vhost_crypto {
 195         /** Used to lookup DPDK Cryptodev Session based on VIRTIO crypto
 196          *  session ID.
 197          */
 198         struct rte_hash *session_map;
 199         struct rte_mempool *mbuf_pool;
 200         struct rte_mempool *sess_pool;
 201
 202         /** DPDK cryptodev ID */
 203         uint8_t cid;
 204         uint16_t nb_qps;
 205
 206         uint64_t last_session_id;
 207
 208         uint64_t cache_session_id;
 209         struct rte_cryptodev_sym_session *cache_session;
 210         /** socket id for the device */
 211         int socket_id;
 212
 213         struct virtio_net *dev;
 214
 215         uint8_t option;
 216 } __rte_cache_aligned;
 217
 218 struct vhost_crypto_data_req {
 219         struct vring_desc *head;
 220         struct virtio_net *dev;
 221         struct virtio_crypto_inhdr *inhdr;
 222         struct vhost_virtqueue *vq;
 223         struct vring_desc *wb_desc;
 224         uint16_t wb_len;
 225         uint16_t desc_idx;
 226         uint16_t len;
 227         uint16_t zero_copy;
 228 };
 229
 230 static int
 231 transform_cipher_param(struct rte_crypto_sym_xform *xform,
 232                 VhostUserCryptoSessionParam *param)
 233 {
 234         int ret;
 235
 236         ret = cipher_algo_transform(param->cipher_algo);
 237         if (unlikely(ret < 0))
 238                 return ret;
 239
 240         xform->type = RTE_CRYPTO_SYM_XFORM_CIPHER;
 241         xform->cipher.algo = (uint32_t)ret;
 242         xform->cipher.key.length = param->cipher_key_len;
 243         if (xform->cipher.key.length > 0)
 244                 xform->cipher.key.data = param->cipher_key_buf;
 245         if (param->dir == VIRTIO_CRYPTO_OP_ENCRYPT)
 246                 xform->cipher.op = RTE_CRYPTO_CIPHER_OP_ENCRYPT;
 247         else if (param->dir == VIRTIO_CRYPTO_OP_DECRYPT)
 248                 xform->cipher.op = RTE_CRYPTO_CIPHER_OP_DECRYPT;
 249         else {
 250                 VC_LOG_DBG("Bad operation type");
 251                 return -VIRTIO_CRYPTO_BADMSG;
 252         }
 253
 254         ret = get_iv_len(xform->cipher.algo);
 255         if (unlikely(ret < 0))
 256                 return ret;
 257         xform->cipher.iv.length = (uint16_t)ret;
 258         xform->cipher.iv.offset = IV_OFFSET;
 259         return 0;
 260 }
 261
 262 static int
 263 transform_chain_param(struct rte_crypto_sym_xform *xforms,
 264                 VhostUserCryptoSessionParam *param)
 265 {
 266         struct rte_crypto_sym_xform *xform_cipher, *xform_auth;
 267         int ret;
 268
 269         switch (param->chaining_dir) {
 270         case VIRTIO_CRYPTO_SYM_ALG_CHAIN_ORDER_HASH_THEN_CIPHER:
 271                 xform_auth = xforms;
 272                 xform_cipher = xforms->next;
 273                 xform_cipher->cipher.op = RTE_CRYPTO_CIPHER_OP_DECRYPT;
 274                 xform_auth->auth.op = RTE_CRYPTO_AUTH_OP_VERIFY;
 275                 break;
 276         case VIRTIO_CRYPTO_SYM_ALG_CHAIN_ORDER_CIPHER_THEN_HASH:
 277                 xform_cipher = xforms;
 278                 xform_auth = xforms->next;
 279                 xform_cipher->cipher.op = RTE_CRYPTO_CIPHER_OP_ENCRYPT;
 280                 xform_auth->auth.op = RTE_CRYPTO_AUTH_OP_GENERATE;
 281                 break;
 282         default:
 283                 return -VIRTIO_CRYPTO_BADMSG;
 284         }
 285
 286         /* cipher */
 287         ret = cipher_algo_transform(param->cipher_algo);
 288         if (unlikely(ret < 0))
 289                 return ret;
 290         xform_cipher->type = RTE_CRYPTO_SYM_XFORM_CIPHER;
 291         xform_cipher->cipher.algo = (uint32_t)ret;
 292         xform_cipher->cipher.key.length = param->cipher_key_len;
 293         xform_cipher->cipher.key.data = param->cipher_key_buf;
 294         ret = get_iv_len(xform_cipher->cipher.algo);
 295         if (unlikely(ret < 0))
 296                 return ret;
 297         xform_cipher->cipher.iv.length = (uint16_t)ret;
 298         xform_cipher->cipher.iv.offset = IV_OFFSET;
 299
 300         /* auth */
 301         xform_auth->type = RTE_CRYPTO_SYM_XFORM_AUTH;
 302         ret = auth_algo_transform(param->hash_algo);
 303         if (unlikely(ret < 0))
 304                 return ret;
 305         xform_auth->auth.algo = (uint32_t)ret;
 306         xform_auth->auth.digest_length = param->digest_len;
 307         xform_auth->auth.key.length = param->auth_key_len;
 308         xform_auth->auth.key.data = param->auth_key_buf;
 309
 310         return 0;
 311 }
 312
 313 static void
 314 vhost_crypto_create_sess(struct vhost_crypto *vcrypto,
 315                 VhostUserCryptoSessionParam *sess_param)
 316 {
 317         struct rte_crypto_sym_xform xform1 = {0}, xform2 = {0};
 318         struct rte_cryptodev_sym_session *session;
 319         int ret;
 320
 321         switch (sess_param->op_type) {
 322         case VIRTIO_CRYPTO_SYM_OP_NONE:
 323         case VIRTIO_CRYPTO_SYM_OP_CIPHER:
 324                 ret = transform_cipher_param(&xform1, sess_param);
 325                 if (unlikely(ret)) {
 326                         VC_LOG_ERR("Error transform session msg (%i)", ret);
 327                         sess_param->session_id = ret;
 328                         return;
 329                 }
 330                 break;
 331         case VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING:
 332                 if (unlikely(sess_param->hash_mode !=
 333                                 VIRTIO_CRYPTO_SYM_HASH_MODE_AUTH)) {
 334                         sess_param->session_id = -VIRTIO_CRYPTO_NOTSUPP;
 335                         VC_LOG_ERR("Error transform session message (%i)",
 336                                         -VIRTIO_CRYPTO_NOTSUPP);
 337                         return;
 338                 }
 339
 340                 xform1.next = &xform2;
 341
 342                 ret = transform_chain_param(&xform1, sess_param);
 343                 if (unlikely(ret)) {
 344                         VC_LOG_ERR("Error transform session message (%i)", ret);
 345                         sess_param->session_id = ret;
 346                         return;
 347                 }
 348
 349                 break;
 350         default:
 351                 VC_LOG_ERR("Algorithm not yet supported");
 352                 sess_param->session_id = -VIRTIO_CRYPTO_NOTSUPP;
 353                 return;
 354         }
 355
 356         session = rte_cryptodev_sym_session_create(vcrypto->sess_pool);
 357         if (!session) {
 358                 VC_LOG_ERR("Failed to create session");
 359                 sess_param->session_id = -VIRTIO_CRYPTO_ERR;
 360                 return;
 361         }
 362
 363         if (rte_cryptodev_sym_session_init(vcrypto->cid, session, &xform1,
 364                         vcrypto->sess_pool) < 0) {
 365                 VC_LOG_ERR("Failed to initialize session");
 366                 sess_param->session_id = -VIRTIO_CRYPTO_ERR;
 367                 return;
 368         }
 369
 370         /* insert hash to map */
 371         if (rte_hash_add_key_data(vcrypto->session_map,
 372                         &vcrypto->last_session_id, session) < 0) {
 373                 VC_LOG_ERR("Failed to insert session to hash table");
 374
 375                 if (rte_cryptodev_sym_session_clear(vcrypto->cid, session) < 0)
 376                         VC_LOG_ERR("Failed to clear session");
 377                 else {
 378                         if (rte_cryptodev_sym_session_free(session) < 0)
 379                                 VC_LOG_ERR("Failed to free session");
 380                 }
 381                 sess_param->session_id = -VIRTIO_CRYPTO_ERR;
 382                 return;
 383         }
 384
 385         VC_LOG_INFO("Session %"PRIu64" created for vdev %i.",
 386                         vcrypto->last_session_id, vcrypto->dev->vid);
 387
 388         sess_param->session_id = vcrypto->last_session_id;
 389         vcrypto->last_session_id++;
 390 }
 391
 392 static int
 393 vhost_crypto_close_sess(struct vhost_crypto *vcrypto, uint64_t session_id)
 394 {
 395         struct rte_cryptodev_sym_session *session;
 396         uint64_t sess_id = session_id;
 397         int ret;
 398
 399         ret = rte_hash_lookup_data(vcrypto->session_map, &sess_id,
 400                         (void **)&session);
 401
 402         if (unlikely(ret < 0)) {
 403                 VC_LOG_ERR("Failed to delete session %"PRIu64".", session_id);
 404                 return -VIRTIO_CRYPTO_INVSESS;
 405         }
 406
 407         if (rte_cryptodev_sym_session_clear(vcrypto->cid, session) < 0) {
 408                 VC_LOG_DBG("Failed to clear session");
 409                 return -VIRTIO_CRYPTO_ERR;
 410         }
 411
 412         if (rte_cryptodev_sym_session_free(session) < 0) {
 413                 VC_LOG_DBG("Failed to free session");
 414                 return -VIRTIO_CRYPTO_ERR;
 415         }
 416
 417         if (rte_hash_del_key(vcrypto->session_map, &sess_id) < 0) {
 418                 VC_LOG_DBG("Failed to delete session from hash table.");
 419                 return -VIRTIO_CRYPTO_ERR;
 420         }
 421
 422         VC_LOG_INFO("Session %"PRIu64" deleted for vdev %i.", sess_id,
 423                         vcrypto->dev->vid);
 424
 425         return 0;
 426 }
 427
 428 static enum vh_result
 429 vhost_crypto_msg_post_handler(int vid, void *msg)
 430 {
 431         struct virtio_net *dev = get_device(vid);
 432         struct vhost_crypto *vcrypto;
 433         VhostUserMsg *vmsg = msg;
 434         enum vh_result ret = VH_RESULT_OK;
 435
 436         if (dev == NULL) {
 437                 VC_LOG_ERR("Invalid vid %i", vid);
 438                 return VH_RESULT_ERR;
 439         }
 440
 441         vcrypto = dev->extern_data;
 442         if (vcrypto == NULL) {
 443                 VC_LOG_ERR("Cannot find required data, is it initialized?");
 444                 return VH_RESULT_ERR;
 445         }
 446
 447         if (vmsg->request.master == VHOST_USER_CRYPTO_CREATE_SESS) {
 448                 vhost_crypto_create_sess(vcrypto,
 449                                 &vmsg->payload.crypto_session);
 450                 ret = VH_RESULT_REPLY;
 451         } else if (vmsg->request.master == VHOST_USER_CRYPTO_CLOSE_SESS) {
 452                 if (vhost_crypto_close_sess(vcrypto, vmsg->payload.u64))
 453                         ret = VH_RESULT_ERR;
 454         }
 455
 456         return ret;
 457 }
 458
 459 static __rte_always_inline struct vring_desc *
 460 find_write_desc(struct vring_desc *head, struct vring_desc *desc)
 461 {
 462         if (desc->flags & VRING_DESC_F_WRITE)
 463                 return desc;
 464
 465         while (desc->flags & VRING_DESC_F_NEXT) {
 466                 desc = &head[desc->next];
 467                 if (desc->flags & VRING_DESC_F_WRITE)
 468                         return desc;
 469         }
 470
 471         return NULL;
 472 }
 473
 474 static struct virtio_crypto_inhdr *
 475 reach_inhdr(struct vhost_crypto_data_req *vc_req, struct vring_desc *desc)
 476 {
 477         uint64_t dlen;
 478         struct virtio_crypto_inhdr *inhdr;
 479
 480         while (desc->flags & VRING_DESC_F_NEXT)
 481                 desc = &vc_req->head[desc->next];
 482
 483         dlen = desc->len;
 484         inhdr = IOVA_TO_VVA(struct virtio_crypto_inhdr *, vc_req, desc->addr,
 485                         &dlen, VHOST_ACCESS_WO);
 486         if (unlikely(!inhdr || dlen != desc->len))
 487                 return NULL;
 488
 489         return inhdr;
 490 }
 491
 492 static __rte_always_inline int
 493 move_desc(struct vring_desc *head, struct vring_desc **cur_desc,
 494                 uint32_t size)
 495 {
 496         struct vring_desc *desc = *cur_desc;
 497         int left = size;
 498
 499         rte_prefetch0(&head[desc->next]);
 500         left -= desc->len;
 501
 502         while ((desc->flags & VRING_DESC_F_NEXT) && left > 0) {
 503                 desc = &head[desc->next];
 504                 rte_prefetch0(&head[desc->next]);
 505                 left -= desc->len;
 506         }
 507
 508         if (unlikely(left > 0)) {
 509                 VC_LOG_ERR("Incorrect virtio descriptor");
 510                 return -1;
 511         }
 512
 513         *cur_desc = &head[desc->next];
 514         return 0;
 515 }
 516
 517 static int
 518 copy_data(void *dst_data, struct vhost_crypto_data_req *vc_req,
 519                 struct vring_desc **cur_desc, uint32_t size)
 520 {
 521         struct vring_desc *desc = *cur_desc;
 522         uint64_t remain, addr, dlen, len;
 523         uint32_t to_copy;
 524         uint8_t *data = dst_data;
 525         uint8_t *src;
 526         int left = size;
 527
 528         rte_prefetch0(&vc_req->head[desc->next]);
 529         to_copy = RTE_MIN(desc->len, (uint32_t)left);
 530         dlen = to_copy;
 531         src = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr, &dlen,
 532                         VHOST_ACCESS_RO);
 533         if (unlikely(!src || !dlen)) {
 534                 VC_LOG_ERR("Failed to map descriptor");
 535                 return -1;
 536         }
 537
 538         rte_memcpy((uint8_t *)data, src, dlen);
 539         data += dlen;
 540
 541         if (unlikely(dlen < to_copy)) {
 542                 remain = to_copy - dlen;
 543                 addr = desc->addr + dlen;
 544
 545                 while (remain) {
 546                         len = remain;
 547                         src = IOVA_TO_VVA(uint8_t *, vc_req, addr, &len,
 548                                         VHOST_ACCESS_RO);
 549                         if (unlikely(!src || !len)) {
 550                                 VC_LOG_ERR("Failed to map descriptor");
 551                                 return -1;
 552                         }
 553
 554                         rte_memcpy(data, src, len);
 555                         addr += len;
 556                         remain -= len;
 557                         data += len;
 558                 }
 559         }
 560
 561         left -= to_copy;
 562
 563         while ((desc->flags & VRING_DESC_F_NEXT) && left > 0) {
 564                 desc = &vc_req->head[desc->next];
 565                 rte_prefetch0(&vc_req->head[desc->next]);
 566                 to_copy = RTE_MIN(desc->len, (uint32_t)left);
 567                 dlen = desc->len;
 568                 src = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr, &dlen,
 569                                 VHOST_ACCESS_RO);
 570                 if (unlikely(!src || !dlen)) {
 571                         VC_LOG_ERR("Failed to map descriptor");
 572                         return -1;
 573                 }
 574
 575                 rte_memcpy(data, src, dlen);
 576                 data += dlen;
 577
 578                 if (unlikely(dlen < to_copy)) {
 579                         remain = to_copy - dlen;
 580                         addr = desc->addr + dlen;
 581
 582                         while (remain) {
 583                                 len = remain;
 584                                 src = IOVA_TO_VVA(uint8_t *, vc_req, addr, &len,
 585                                                 VHOST_ACCESS_RO);
 586                                 if (unlikely(!src || !len)) {
 587                                         VC_LOG_ERR("Failed to map descriptor");
 588                                         return -1;
 589                                 }
 590
 591                                 rte_memcpy(data, src, len);
 592                                 addr += len;
 593                                 remain -= len;
 594                                 data += len;
 595                         }
 596                 }
 597
 598                 left -= to_copy;
 599         }
 600
 601         if (unlikely(left > 0)) {
 602                 VC_LOG_ERR("Incorrect virtio descriptor");
 603                 return -1;
 604         }
 605
 606         *cur_desc = &vc_req->head[desc->next];
 607
 608         return 0;
 609 }
 610
 611 static __rte_always_inline void *
 612 get_data_ptr(struct vhost_crypto_data_req *vc_req, struct vring_desc **cur_desc,
 613                 uint32_t size, uint8_t perm)
 614 {
 615         void *data;
 616         uint64_t dlen = (*cur_desc)->len;
 617
 618         data = IOVA_TO_VVA(void *, vc_req, (*cur_desc)->addr, &dlen, perm);
 619         if (unlikely(!data || dlen != (*cur_desc)->len)) {
 620                 VC_LOG_ERR("Failed to map object");
 621                 return NULL;
 622         }
 623
 624         if (unlikely(move_desc(vc_req->head, cur_desc, size) < 0))
 625                 return NULL;
 626
 627         return data;
 628 }
 629
 630 static int
 631 write_back_data(struct rte_crypto_op *op, struct vhost_crypto_data_req *vc_req)
 632 {
 633         struct rte_mbuf *mbuf = op->sym->m_dst;
 634         struct vring_desc *head = vc_req->head;
 635         struct vring_desc *desc = vc_req->wb_desc;
 636         int left = vc_req->wb_len;
 637         uint32_t to_write;
 638         uint8_t *src_data = mbuf->buf_addr, *dst;
 639         uint64_t dlen;
 640
 641         rte_prefetch0(&head[desc->next]);
 642         to_write = RTE_MIN(desc->len, (uint32_t)left);
 643         dlen = desc->len;
 644         dst = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr, &dlen,
 645                         VHOST_ACCESS_RW);
 646         if (unlikely(!dst || dlen != desc->len)) {
 647                 VC_LOG_ERR("Failed to map descriptor");
 648                 return -1;
 649         }
 650
 651         rte_memcpy(dst, src_data, to_write);
 652         left -= to_write;
 653         src_data += to_write;
 654
 655         while ((desc->flags & VRING_DESC_F_NEXT) && left > 0) {
 656                 desc = &head[desc->next];
 657                 rte_prefetch0(&head[desc->next]);
 658                 to_write = RTE_MIN(desc->len, (uint32_t)left);
 659                 dlen = desc->len;
 660                 dst = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr, &dlen,
 661                                 VHOST_ACCESS_RW);
 662                 if (unlikely(!dst || dlen != desc->len)) {
 663                         VC_LOG_ERR("Failed to map descriptor");
 664                         return -1;
 665                 }
 666
 667                 rte_memcpy(dst, src_data, to_write);
 668                 left -= to_write;
 669                 src_data += to_write;
 670         }
 671
 672         if (unlikely(left < 0)) {
 673                 VC_LOG_ERR("Incorrect virtio descriptor");
 674                 return -1;
 675         }
 676
 677         return 0;
 678 }
 679
 680 static uint8_t
 681 prepare_sym_cipher_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op,
 682                 struct vhost_crypto_data_req *vc_req,
 683                 struct virtio_crypto_cipher_data_req *cipher,
 684                 struct vring_desc *cur_desc)
 685 {
 686         struct vring_desc *desc = cur_desc;
 687         struct rte_mbuf *m_src = op->sym->m_src, *m_dst = op->sym->m_dst;
 688         uint8_t *iv_data = rte_crypto_op_ctod_offset(op, uint8_t *, IV_OFFSET);
 689         uint8_t ret = 0;
 690
 691         /* prepare */
 692         /* iv */
 693         if (unlikely(copy_data(iv_data, vc_req, &desc,
 694                         cipher->para.iv_len) < 0)) {
 695                 ret = VIRTIO_CRYPTO_BADMSG;
 696                 goto error_exit;
 697         }
 698
 699         m_src->data_len = cipher->para.src_data_len;
 700
 701         switch (vcrypto->option) {
 702         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
 703                 m_src->buf_iova = gpa_to_hpa(vcrypto->dev, desc->addr,
 704                                 cipher->para.src_data_len);
 705                 m_src->buf_addr = get_data_ptr(vc_req, &desc,
 706                                 cipher->para.src_data_len, VHOST_ACCESS_RO);
 707                 if (unlikely(m_src->buf_iova == 0 ||
 708                                 m_src->buf_addr == NULL)) {
 709                         VC_LOG_ERR("zero_copy may fail due to cross page data");
 710                         ret = VIRTIO_CRYPTO_ERR;
 711                         goto error_exit;
 712                 }
 713                 break;
 714         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
 715                 if (unlikely(cipher->para.src_data_len >
 716                                 RTE_MBUF_DEFAULT_BUF_SIZE)) {
 717                         VC_LOG_ERR("Not enough space to do data copy");
 718                         ret = VIRTIO_CRYPTO_ERR;
 719                         goto error_exit;
 720                 }
 721                 if (unlikely(copy_data(rte_pktmbuf_mtod(m_src, uint8_t *),
 722                                 vc_req, &desc, cipher->para.src_data_len)
 723                                 < 0)) {
 724                         ret = VIRTIO_CRYPTO_BADMSG;
 725                         goto error_exit;
 726                 }
 727                 break;
 728         default:
 729                 ret = VIRTIO_CRYPTO_BADMSG;
 730                 goto error_exit;
 731         }
 732
 733         /* dst */
 734         desc = find_write_desc(vc_req->head, desc);
 735         if (unlikely(!desc)) {
 736                 VC_LOG_ERR("Cannot find write location");
 737                 ret = VIRTIO_CRYPTO_BADMSG;
 738                 goto error_exit;
 739         }
 740
 741         switch (vcrypto->option) {
 742         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
 743                 m_dst->buf_iova = gpa_to_hpa(vcrypto->dev,
 744                                 desc->addr, cipher->para.dst_data_len);
 745                 m_dst->buf_addr = get_data_ptr(vc_req, &desc,
 746                                 cipher->para.dst_data_len, VHOST_ACCESS_RW);
 747                 if (unlikely(m_dst->buf_iova == 0 || m_dst->buf_addr == NULL)) {
 748                         VC_LOG_ERR("zero_copy may fail due to cross page data");
 749                         ret = VIRTIO_CRYPTO_ERR;
 750                         goto error_exit;
 751                 }
 752
 753                 m_dst->data_len = cipher->para.dst_data_len;
 754                 break;
 755         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
 756                 vc_req->wb_desc = desc;
 757                 vc_req->wb_len = cipher->para.dst_data_len;
 758                 if (unlikely(move_desc(vc_req->head, &desc,
 759                                 vc_req->wb_len) < 0)) {
 760                         ret = VIRTIO_CRYPTO_ERR;
 761                         goto error_exit;
 762                 }
 763                 break;
 764         default:
 765                 ret = VIRTIO_CRYPTO_BADMSG;
 766                 goto error_exit;
 767         }
 768
 769         /* src data */
 770         op->type = RTE_CRYPTO_OP_TYPE_SYMMETRIC;
 771         op->sess_type = RTE_CRYPTO_OP_WITH_SESSION;
 772
 773         op->sym->cipher.data.offset = 0;
 774         op->sym->cipher.data.length = cipher->para.src_data_len;
 775
 776         vc_req->inhdr = get_data_ptr(vc_req, &desc, INHDR_LEN, VHOST_ACCESS_WO);
 777         if (unlikely(vc_req->inhdr == NULL)) {
 778                 ret = VIRTIO_CRYPTO_BADMSG;
 779                 goto error_exit;
 780         }
 781
 782         vc_req->inhdr->status = VIRTIO_CRYPTO_OK;
 783         vc_req->len = cipher->para.dst_data_len + INHDR_LEN;
 784
 785         return 0;
 786
 787 error_exit:
 788         vc_req->len = INHDR_LEN;
 789         return ret;
 790 }
 791
 792 static uint8_t
 793 prepare_sym_chain_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op,
 794                 struct vhost_crypto_data_req *vc_req,
 795                 struct virtio_crypto_alg_chain_data_req *chain,
 796                 struct vring_desc *cur_desc)
 797 {
 798         struct vring_desc *desc = cur_desc;
 799         struct rte_mbuf *m_src = op->sym->m_src, *m_dst = op->sym->m_dst;
 800         uint8_t *iv_data = rte_crypto_op_ctod_offset(op, uint8_t *, IV_OFFSET);
 801         uint32_t digest_offset;
 802         void *digest_addr;
 803         uint8_t ret = 0;
 804
 805         /* prepare */
 806         /* iv */
 807         if (unlikely(copy_data(iv_data, vc_req, &desc,
 808                         chain->para.iv_len) < 0)) {
 809                 ret = VIRTIO_CRYPTO_BADMSG;
 810                 goto error_exit;
 811         }
 812
 813         m_src->data_len = chain->para.src_data_len;
 814         m_dst->data_len = chain->para.dst_data_len;
 815
 816         switch (vcrypto->option) {
 817         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
 818                 m_src->buf_iova = gpa_to_hpa(vcrypto->dev, desc->addr,
 819                                 chain->para.src_data_len);
 820                 m_src->buf_addr = get_data_ptr(vc_req, &desc,
 821                                 chain->para.src_data_len, VHOST_ACCESS_RO);
 822                 if (unlikely(m_src->buf_iova == 0 || m_src->buf_addr == NULL)) {
 823                         VC_LOG_ERR("zero_copy may fail due to cross page data");
 824                         ret = VIRTIO_CRYPTO_ERR;
 825                         goto error_exit;
 826                 }
 827                 break;
 828         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
 829                 if (unlikely(chain->para.src_data_len >
 830                                 RTE_MBUF_DEFAULT_BUF_SIZE)) {
 831                         VC_LOG_ERR("Not enough space to do data copy");
 832                         ret = VIRTIO_CRYPTO_ERR;
 833                         goto error_exit;
 834                 }
 835                 if (unlikely(copy_data(rte_pktmbuf_mtod(m_src, uint8_t *),
 836                                 vc_req, &desc, chain->para.src_data_len)) < 0) {
 837                         ret = VIRTIO_CRYPTO_BADMSG;
 838                         goto error_exit;
 839                 }
 840                 break;
 841         default:
 842                 ret = VIRTIO_CRYPTO_BADMSG;
 843                 goto error_exit;
 844         }
 845
 846         /* dst */
 847         desc = find_write_desc(vc_req->head, desc);
 848         if (unlikely(!desc)) {
 849                 VC_LOG_ERR("Cannot find write location");
 850                 ret = VIRTIO_CRYPTO_BADMSG;
 851                 goto error_exit;
 852         }
 853
 854         switch (vcrypto->option) {
 855         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
 856                 m_dst->buf_iova = gpa_to_hpa(vcrypto->dev,
 857                                 desc->addr, chain->para.dst_data_len);
 858                 m_dst->buf_addr = get_data_ptr(vc_req, &desc,
 859                                 chain->para.dst_data_len, VHOST_ACCESS_RW);
 860                 if (unlikely(m_dst->buf_iova == 0 || m_dst->buf_addr == NULL)) {
 861                         VC_LOG_ERR("zero_copy may fail due to cross page data");
 862                         ret = VIRTIO_CRYPTO_ERR;
 863                         goto error_exit;
 864                 }
 865
 866                 op->sym->auth.digest.phys_addr = gpa_to_hpa(vcrypto->dev,
 867                                 desc->addr, chain->para.hash_result_len);
 868                 op->sym->auth.digest.data = get_data_ptr(vc_req, &desc,
 869                                 chain->para.hash_result_len, VHOST_ACCESS_RW);
 870                 if (unlikely(op->sym->auth.digest.phys_addr == 0)) {
 871                         VC_LOG_ERR("zero_copy may fail due to cross page data");
 872                         ret = VIRTIO_CRYPTO_ERR;
 873                         goto error_exit;
 874                 }
 875                 break;
 876         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
 877                 digest_offset = m_dst->data_len;
 878                 digest_addr = rte_pktmbuf_mtod_offset(m_dst, void *,
 879                                 digest_offset);
 880
 881                 vc_req->wb_desc = desc;
 882                 vc_req->wb_len = m_dst->data_len + chain->para.hash_result_len;
 883
 884                 if (unlikely(move_desc(vc_req->head, &desc,
 885                                 chain->para.dst_data_len) < 0)) {
 886                         ret = VIRTIO_CRYPTO_BADMSG;
 887                         goto error_exit;
 888                 }
 889
 890                 if (unlikely(copy_data(digest_addr, vc_req, &desc,
 891                                 chain->para.hash_result_len)) < 0) {
 892                         ret = VIRTIO_CRYPTO_BADMSG;
 893                         goto error_exit;
 894                 }
 895
 896                 op->sym->auth.digest.data = digest_addr;
 897                 op->sym->auth.digest.phys_addr = rte_pktmbuf_iova_offset(m_dst,
 898                                 digest_offset);
 899                 break;
 900         default:
 901                 ret = VIRTIO_CRYPTO_BADMSG;
 902                 goto error_exit;
 903         }
 904
 905         /* record inhdr */
 906         vc_req->inhdr = get_data_ptr(vc_req, &desc, INHDR_LEN, VHOST_ACCESS_WO);
 907         if (unlikely(vc_req->inhdr == NULL)) {
 908                 ret = VIRTIO_CRYPTO_BADMSG;
 909                 goto error_exit;
 910         }
 911
 912         vc_req->inhdr->status = VIRTIO_CRYPTO_OK;
 913
 914         op->type = RTE_CRYPTO_OP_TYPE_SYMMETRIC;
 915         op->sess_type = RTE_CRYPTO_OP_WITH_SESSION;
 916
 917         op->sym->cipher.data.offset = chain->para.cipher_start_src_offset;
 918         op->sym->cipher.data.length = chain->para.src_data_len -
 919                         chain->para.cipher_start_src_offset;
 920
 921         op->sym->auth.data.offset = chain->para.hash_start_src_offset;
 922         op->sym->auth.data.length = chain->para.len_to_hash;
 923
 924         vc_req->len = chain->para.dst_data_len + chain->para.hash_result_len +
 925                         INHDR_LEN;
 926         return 0;
 927
 928 error_exit:
 929         vc_req->len = INHDR_LEN;
 930         return ret;
 931 }
 932
 933 /**
 934  * Process on descriptor
 935  */
 936 static __rte_always_inline int
 937 vhost_crypto_process_one_req(struct vhost_crypto *vcrypto,
 938                 struct vhost_virtqueue *vq, struct rte_crypto_op *op,
 939                 struct vring_desc *head, uint16_t desc_idx)
 940 {
 941         struct vhost_crypto_data_req *vc_req = rte_mbuf_to_priv(op->sym->m_src);
 942         struct rte_cryptodev_sym_session *session;
 943         struct virtio_crypto_op_data_req *req, tmp_req;
 944         struct virtio_crypto_inhdr *inhdr;
 945         struct vring_desc *desc = NULL;
 946         uint64_t session_id;
 947         uint64_t dlen;
 948         int err = 0;
 949
 950         vc_req->desc_idx = desc_idx;
 951         vc_req->dev = vcrypto->dev;
 952         vc_req->vq = vq;
 953
 954         if (likely(head->flags & VRING_DESC_F_INDIRECT)) {
 955                 dlen = head->len;
 956                 desc = IOVA_TO_VVA(struct vring_desc *, vc_req, head->addr,
 957                                 &dlen, VHOST_ACCESS_RO);
 958                 if (unlikely(!desc || dlen != head->len))
 959                         return -1;
 960                 desc_idx = 0;
 961                 head = desc;
 962         } else {
 963                 desc = head;
 964         }
 965
 966         vc_req->head = head;
 967         vc_req->zero_copy = vcrypto->option;
 968
 969         req = get_data_ptr(vc_req, &desc, sizeof(*req), VHOST_ACCESS_RO);
 970         if (unlikely(req == NULL)) {
 971                 switch (vcrypto->option) {
 972                 case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
 973                         err = VIRTIO_CRYPTO_BADMSG;
 974                         VC_LOG_ERR("Invalid descriptor");
 975                         goto error_exit;
 976                 case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
 977                         req = &tmp_req;
 978                         if (unlikely(copy_data(req, vc_req, &desc, sizeof(*req))
 979                                         < 0)) {
 980                                 err = VIRTIO_CRYPTO_BADMSG;
 981                                 VC_LOG_ERR("Invalid descriptor");
 982                                 goto error_exit;
 983                         }
 984                         break;
 985                 default:
 986                         err = VIRTIO_CRYPTO_ERR;
 987                         VC_LOG_ERR("Invalid option");
 988                         goto error_exit;
 989                 }
 990         }
 991
 992         switch (req->header.opcode) {
 993         case VIRTIO_CRYPTO_CIPHER_ENCRYPT:
 994         case VIRTIO_CRYPTO_CIPHER_DECRYPT:
 995                 session_id = req->header.session_id;
 996
 997                 /* one branch to avoid unnecessary table lookup */
 998                 if (vcrypto->cache_session_id != session_id) {
 999                         err = rte_hash_lookup_data(vcrypto->session_map,
1000                                         &session_id, (void **)&session);
1001                         if (unlikely(err < 0)) {
1002                                 err = VIRTIO_CRYPTO_ERR;
1003                                 VC_LOG_ERR("Failed to find session %"PRIu64,
1004                                                 session_id);
1005                                 goto error_exit;
1006                         }
1007
1008                         vcrypto->cache_session = session;
1009                         vcrypto->cache_session_id = session_id;
1010                 }
1011
1012                 session = vcrypto->cache_session;
1013
1014                 err = rte_crypto_op_attach_sym_session(op, session);
1015                 if (unlikely(err < 0)) {
1016                         err = VIRTIO_CRYPTO_ERR;
1017                         VC_LOG_ERR("Failed to attach session to op");
1018                         goto error_exit;
1019                 }
1020
1021                 switch (req->u.sym_req.op_type) {
1022                 case VIRTIO_CRYPTO_SYM_OP_NONE:
1023                         err = VIRTIO_CRYPTO_NOTSUPP;
1024                         break;
1025                 case VIRTIO_CRYPTO_SYM_OP_CIPHER:
1026                         err = prepare_sym_cipher_op(vcrypto, op, vc_req,
1027                                         &req->u.sym_req.u.cipher, desc);
1028                         break;
1029                 case VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING:
1030                         err = prepare_sym_chain_op(vcrypto, op, vc_req,
1031                                         &req->u.sym_req.u.chain, desc);
1032                         break;
1033                 }
1034                 if (unlikely(err != 0)) {
1035                         VC_LOG_ERR("Failed to process sym request");
1036                         goto error_exit;
1037                 }
1038                 break;
1039         default:
1040                 VC_LOG_ERR("Unsupported symmetric crypto request type %u",
1041                                 req->header.opcode);
1042                 goto error_exit;
1043         }
1044
1045         return 0;
1046
1047 error_exit:
1048
1049         inhdr = reach_inhdr(vc_req, desc);
1050         if (likely(inhdr != NULL))
1051                 inhdr->status = (uint8_t)err;
1052
1053         return -1;
1054 }
1055
1056 static __rte_always_inline struct vhost_virtqueue *
1057 vhost_crypto_finalize_one_request(struct rte_crypto_op *op,
1058                 struct vhost_virtqueue *old_vq)
1059 {
1060         struct rte_mbuf *m_src = op->sym->m_src;
1061         struct rte_mbuf *m_dst = op->sym->m_dst;
1062         struct vhost_crypto_data_req *vc_req = rte_mbuf_to_priv(m_src);
1063         uint16_t desc_idx;
1064         int ret = 0;
1065
1066         if (unlikely(!vc_req)) {
1067                 VC_LOG_ERR("Failed to retrieve vc_req");
1068                 return NULL;
1069         }
1070
1071         if (old_vq && (vc_req->vq != old_vq))
1072                 return vc_req->vq;
1073
1074         desc_idx = vc_req->desc_idx;
1075
1076         if (unlikely(op->status != RTE_CRYPTO_OP_STATUS_SUCCESS))
1077                 vc_req->inhdr->status = VIRTIO_CRYPTO_ERR;
1078         else {
1079                 if (vc_req->zero_copy == 0) {
1080                         ret = write_back_data(op, vc_req);
1081                         if (unlikely(ret != 0))
1082                                 vc_req->inhdr->status = VIRTIO_CRYPTO_ERR;
1083                 }
1084         }
1085
1086         vc_req->vq->used->ring[desc_idx].id = desc_idx;
1087         vc_req->vq->used->ring[desc_idx].len = vc_req->len;
1088
1089         rte_mempool_put(m_dst->pool, (void *)m_dst);
1090         rte_mempool_put(m_src->pool, (void *)m_src);
1091
1092         return vc_req->vq;
1093 }
1094
1095 static __rte_always_inline uint16_t
1096 vhost_crypto_complete_one_vm_requests(struct rte_crypto_op **ops,
1097                 uint16_t nb_ops, int *callfd)
1098 {
1099         uint16_t processed = 1;
1100         struct vhost_virtqueue *vq, *tmp_vq;
1101
1102         if (unlikely(nb_ops == 0))
1103                 return 0;
1104
1105         vq = vhost_crypto_finalize_one_request(ops[0], NULL);
1106         if (unlikely(vq == NULL))
1107                 return 0;
1108         tmp_vq = vq;
1109
1110         while ((processed < nb_ops)) {
1111                 tmp_vq = vhost_crypto_finalize_one_request(ops[processed],
1112                                 tmp_vq);
1113
1114                 if (unlikely(vq != tmp_vq))
1115                         break;
1116
1117                 processed++;
1118         }
1119
1120         *callfd = vq->callfd;
1121
1122         *(volatile uint16_t *)&vq->used->idx += processed;
1123
1124         return processed;
1125 }
1126
1127 int __rte_experimental
1128 rte_vhost_crypto_create(int vid, uint8_t cryptodev_id,
1129                 struct rte_mempool *sess_pool, int socket_id)
1130 {
1131         struct virtio_net *dev = get_device(vid);
1132         struct rte_hash_parameters params = {0};
1133         struct vhost_crypto *vcrypto;
1134         char name[128];
1135         int ret;
1136
1137         if (!dev) {
1138                 VC_LOG_ERR("Invalid vid %i", vid);
1139                 return -EINVAL;
1140         }
1141
1142         ret = rte_vhost_driver_set_features(dev->ifname,
1143                         VIRTIO_CRYPTO_FEATURES);
1144         if (ret < 0) {
1145                 VC_LOG_ERR("Error setting features");
1146                 return -1;
1147         }
1148
1149         vcrypto = rte_zmalloc_socket(NULL, sizeof(*vcrypto),
1150                         RTE_CACHE_LINE_SIZE, socket_id);
1151         if (!vcrypto) {
1152                 VC_LOG_ERR("Insufficient memory");
1153                 return -ENOMEM;
1154         }
1155
1156         vcrypto->sess_pool = sess_pool;
1157         vcrypto->cid = cryptodev_id;
1158         vcrypto->cache_session_id = UINT64_MAX;
1159         vcrypto->last_session_id = 1;
1160         vcrypto->dev = dev;
1161         vcrypto->option = RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE;
1162
1163         snprintf(name, 127, "HASH_VHOST_CRYPT_%u", (uint32_t)vid);
1164         params.name = name;
1165         params.entries = VHOST_CRYPTO_SESSION_MAP_ENTRIES;
1166         params.hash_func = rte_jhash;
1167         params.key_len = sizeof(uint64_t);
1168         params.socket_id = socket_id;
1169         vcrypto->session_map = rte_hash_create(&params);
1170         if (!vcrypto->session_map) {
1171                 VC_LOG_ERR("Failed to creath session map");
1172                 ret = -ENOMEM;
1173                 goto error_exit;
1174         }
1175
1176         snprintf(name, 127, "MBUF_POOL_VM_%u", (uint32_t)vid);
1177         vcrypto->mbuf_pool = rte_pktmbuf_pool_create(name,
1178                         VHOST_CRYPTO_MBUF_POOL_SIZE, 512,
1179                         sizeof(struct vhost_crypto_data_req),
1180                         RTE_MBUF_DEFAULT_DATAROOM * 2 + RTE_PKTMBUF_HEADROOM,
1181                         rte_socket_id());
1182         if (!vcrypto->mbuf_pool) {
1183                 VC_LOG_ERR("Failed to creath mbuf pool");
1184                 ret = -ENOMEM;
1185                 goto error_exit;
1186         }
1187
1188         dev->extern_data = vcrypto;
1189         dev->extern_ops.pre_msg_handle = NULL;
1190         dev->extern_ops.post_msg_handle = vhost_crypto_msg_post_handler;
1191
1192         return 0;
1193
1194 error_exit:
1195         if (vcrypto->session_map)
1196                 rte_hash_free(vcrypto->session_map);
1197         if (vcrypto->mbuf_pool)
1198                 rte_mempool_free(vcrypto->mbuf_pool);
1199
1200         rte_free(vcrypto);
1201
1202         return ret;
1203 }
1204
1205 int __rte_experimental
1206 rte_vhost_crypto_free(int vid)
1207 {
1208         struct virtio_net *dev = get_device(vid);
1209         struct vhost_crypto *vcrypto;
1210
1211         if (unlikely(dev == NULL)) {
1212                 VC_LOG_ERR("Invalid vid %i", vid);
1213                 return -EINVAL;
1214         }
1215
1216         vcrypto = dev->extern_data;
1217         if (unlikely(vcrypto == NULL)) {
1218                 VC_LOG_ERR("Cannot find required data, is it initialized?");
1219                 return -ENOENT;
1220         }
1221
1222         rte_hash_free(vcrypto->session_map);
1223         rte_mempool_free(vcrypto->mbuf_pool);
1224         rte_free(vcrypto);
1225
1226         dev->extern_data = NULL;
1227         dev->extern_ops.pre_msg_handle = NULL;
1228         dev->extern_ops.post_msg_handle = NULL;
1229
1230         return 0;
1231 }
1232
1233 int __rte_experimental
1234 rte_vhost_crypto_set_zero_copy(int vid, enum rte_vhost_crypto_zero_copy option)
1235 {
1236         struct virtio_net *dev = get_device(vid);
1237         struct vhost_crypto *vcrypto;
1238
1239         if (unlikely(dev == NULL)) {
1240                 VC_LOG_ERR("Invalid vid %i", vid);
1241                 return -EINVAL;
1242         }
1243
1244         if (unlikely((uint32_t)option >=
1245                                 RTE_VHOST_CRYPTO_MAX_ZERO_COPY_OPTIONS)) {
1246                 VC_LOG_ERR("Invalid option %i", option);
1247                 return -EINVAL;
1248         }
1249
1250         vcrypto = (struct vhost_crypto *)dev->extern_data;
1251         if (unlikely(vcrypto == NULL)) {
1252                 VC_LOG_ERR("Cannot find required data, is it initialized?");
1253                 return -ENOENT;
1254         }
1255
1256         if (vcrypto->option == (uint8_t)option)
1257                 return 0;
1258
1259         if (!(rte_mempool_full(vcrypto->mbuf_pool))) {
1260                 VC_LOG_ERR("Cannot update zero copy as mempool is not full");
1261                 return -EINVAL;
1262         }
1263
1264         vcrypto->option = (uint8_t)option;
1265
1266         return 0;
1267 }
1268
1269 uint16_t __rte_experimental
1270 rte_vhost_crypto_fetch_requests(int vid, uint32_t qid,
1271                 struct rte_crypto_op **ops, uint16_t nb_ops)
1272 {
1273         struct rte_mbuf *mbufs[VHOST_CRYPTO_MAX_BURST_SIZE * 2];
1274         struct virtio_net *dev = get_device(vid);
1275         struct vhost_crypto *vcrypto;
1276         struct vhost_virtqueue *vq;
1277         uint16_t avail_idx;
1278         uint16_t start_idx;
1279         uint16_t required;
1280         uint16_t count;
1281         uint16_t i;
1282
1283         if (unlikely(dev == NULL)) {
1284                 VC_LOG_ERR("Invalid vid %i", vid);
1285                 return -EINVAL;
1286         }
1287
1288         if (unlikely(qid >= VHOST_MAX_QUEUE_PAIRS)) {
1289                 VC_LOG_ERR("Invalid qid %u", qid);
1290                 return -EINVAL;
1291         }
1292
1293         vcrypto = (struct vhost_crypto *)dev->extern_data;
1294         if (unlikely(vcrypto == NULL)) {
1295                 VC_LOG_ERR("Cannot find required data, is it initialized?");
1296                 return -ENOENT;
1297         }
1298
1299         vq = dev->virtqueue[qid];
1300
1301         avail_idx = *((volatile uint16_t *)&vq->avail->idx);
1302         start_idx = vq->last_used_idx;
1303         count = avail_idx - start_idx;
1304         count = RTE_MIN(count, VHOST_CRYPTO_MAX_BURST_SIZE);
1305         count = RTE_MIN(count, nb_ops);
1306
1307         if (unlikely(count == 0))
1308                 return 0;
1309
1310         /* for zero copy, we need 2 empty mbufs for src and dst, otherwise
1311          * we need only 1 mbuf as src and dst
1312          */
1313         required = count * 2;
1314         if (unlikely(rte_mempool_get_bulk(vcrypto->mbuf_pool, (void **)mbufs,
1315                         required) < 0)) {
1316                 VC_LOG_ERR("Insufficient memory");
1317                 return -ENOMEM;
1318         }
1319
1320         for (i = 0; i < count; i++) {
1321                 uint16_t used_idx = (start_idx + i) & (vq->size - 1);
1322                 uint16_t desc_idx = vq->avail->ring[used_idx];
1323                 struct vring_desc *head = &vq->desc[desc_idx];
1324                 struct rte_crypto_op *op = ops[i];
1325
1326                 op->sym->m_src = mbufs[i * 2];
1327                 op->sym->m_dst = mbufs[i * 2 + 1];
1328                 op->sym->m_src->data_off = 0;
1329                 op->sym->m_dst->data_off = 0;
1330
1331                 if (unlikely(vhost_crypto_process_one_req(vcrypto, vq, op, head,
1332                                 desc_idx)) < 0)
1333                         break;
1334         }
1335
1336         vq->last_used_idx += i;
1337
1338         return i;
1339 }
1340
1341 uint16_t __rte_experimental
1342 rte_vhost_crypto_finalize_requests(struct rte_crypto_op **ops,
1343                 uint16_t nb_ops, int *callfds, uint16_t *nb_callfds)
1344 {
1345         struct rte_crypto_op **tmp_ops = ops;
1346         uint16_t count = 0, left = nb_ops;
1347         int callfd;
1348         uint16_t idx = 0;
1349
1350         while (left) {
1351                 count = vhost_crypto_complete_one_vm_requests(tmp_ops, left,
1352                                 &callfd);
1353                 if (unlikely(count == 0))
1354                         break;
1355
1356                 tmp_ops = &tmp_ops[count];
1357                 left -= count;
1358
1359                 callfds[idx++] = callfd;
1360
1361                 if (unlikely(idx >= VIRTIO_CRYPTO_MAX_NUM_BURST_VQS)) {
1362                         VC_LOG_ERR("Too many vqs");
1363                         break;
1364                 }
1365         }
1366
1367         *nb_callfds = idx;
1368
1369         return nb_ops - left;
1370 }