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 int
 429 vhost_crypto_msg_post_handler(int vid, void *msg, uint32_t *require_reply)
 430 {
 431         struct virtio_net *dev = get_device(vid);
 432         struct vhost_crypto *vcrypto;
 433         VhostUserMsg *vmsg = msg;
 434         int ret = 0;
 435
 436         if (dev == NULL || require_reply == NULL) {
 437                 VC_LOG_ERR("Invalid vid %i", vid);
 438                 return -EINVAL;
 439         }
 440
 441         vcrypto = dev->extern_data;
 442         if (vcrypto == NULL) {
 443                 VC_LOG_ERR("Cannot find required data, is it initialized?");
 444                 return -ENOENT;
 445         }
 446
 447         *require_reply = 0;
 448
 449         if (vmsg->request.master == VHOST_USER_CRYPTO_CREATE_SESS) {
 450                 vhost_crypto_create_sess(vcrypto,
 451                                 &vmsg->payload.crypto_session);
 452                 *require_reply = 1;
 453         } else if (vmsg->request.master == VHOST_USER_CRYPTO_CLOSE_SESS)
 454                 ret = vhost_crypto_close_sess(vcrypto, vmsg->payload.u64);
 455         else
 456                 ret = -EINVAL;
 457
 458         return ret;
 459 }
 460
 461 static __rte_always_inline struct vring_desc *
 462 find_write_desc(struct vring_desc *head, struct vring_desc *desc)
 463 {
 464         if (desc->flags & VRING_DESC_F_WRITE)
 465                 return desc;
 466
 467         while (desc->flags & VRING_DESC_F_NEXT) {
 468                 desc = &head[desc->next];
 469                 if (desc->flags & VRING_DESC_F_WRITE)
 470                         return desc;
 471         }
 472
 473         return NULL;
 474 }
 475
 476 static struct virtio_crypto_inhdr *
 477 reach_inhdr(struct vhost_crypto_data_req *vc_req, struct vring_desc *desc)
 478 {
 479         uint64_t dlen;
 480         struct virtio_crypto_inhdr *inhdr;
 481
 482         while (desc->flags & VRING_DESC_F_NEXT)
 483                 desc = &vc_req->head[desc->next];
 484
 485         dlen = desc->len;
 486         inhdr = IOVA_TO_VVA(struct virtio_crypto_inhdr *, vc_req, desc->addr,
 487                         &dlen, VHOST_ACCESS_WO);
 488         if (unlikely(!inhdr || dlen != desc->len))
 489                 return NULL;
 490
 491         return inhdr;
 492 }
 493
 494 static __rte_always_inline int
 495 move_desc(struct vring_desc *head, struct vring_desc **cur_desc,
 496                 uint32_t size)
 497 {
 498         struct vring_desc *desc = *cur_desc;
 499         int left = size;
 500
 501         rte_prefetch0(&head[desc->next]);
 502         left -= desc->len;
 503
 504         while ((desc->flags & VRING_DESC_F_NEXT) && left > 0) {
 505                 desc = &head[desc->next];
 506                 rte_prefetch0(&head[desc->next]);
 507                 left -= desc->len;
 508         }
 509
 510         if (unlikely(left > 0)) {
 511                 VC_LOG_ERR("Incorrect virtio descriptor");
 512                 return -1;
 513         }
 514
 515         *cur_desc = &head[desc->next];
 516         return 0;
 517 }
 518
 519 static int
 520 copy_data(void *dst_data, struct vhost_crypto_data_req *vc_req,
 521                 struct vring_desc **cur_desc, uint32_t size)
 522 {
 523         struct vring_desc *desc = *cur_desc;
 524         uint64_t remain, addr, dlen, len;
 525         uint32_t to_copy;
 526         uint8_t *data = dst_data;
 527         uint8_t *src;
 528         int left = size;
 529
 530         rte_prefetch0(&vc_req->head[desc->next]);
 531         to_copy = RTE_MIN(desc->len, (uint32_t)left);
 532         dlen = to_copy;
 533         src = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr, &dlen,
 534                         VHOST_ACCESS_RO);
 535         if (unlikely(!src || !dlen)) {
 536                 VC_LOG_ERR("Failed to map descriptor");
 537                 return -1;
 538         }
 539
 540         rte_memcpy((uint8_t *)data, src, dlen);
 541         data += dlen;
 542
 543         if (unlikely(dlen < to_copy)) {
 544                 remain = to_copy - dlen;
 545                 addr = desc->addr + dlen;
 546
 547                 while (remain) {
 548                         len = remain;
 549                         src = IOVA_TO_VVA(uint8_t *, vc_req, addr, &len,
 550                                         VHOST_ACCESS_RO);
 551                         if (unlikely(!src || !len)) {
 552                                 VC_LOG_ERR("Failed to map descriptor");
 553                                 return -1;
 554                         }
 555
 556                         rte_memcpy(data, src, len);
 557                         addr += len;
 558                         remain -= len;
 559                         data += len;
 560                 }
 561         }
 562
 563         left -= to_copy;
 564
 565         while ((desc->flags & VRING_DESC_F_NEXT) && left > 0) {
 566                 desc = &vc_req->head[desc->next];
 567                 rte_prefetch0(&vc_req->head[desc->next]);
 568                 to_copy = RTE_MIN(desc->len, (uint32_t)left);
 569                 dlen = desc->len;
 570                 src = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr, &dlen,
 571                                 VHOST_ACCESS_RO);
 572                 if (unlikely(!src || !dlen)) {
 573                         VC_LOG_ERR("Failed to map descriptor");
 574                         return -1;
 575                 }
 576
 577                 rte_memcpy(data, src, dlen);
 578                 data += dlen;
 579
 580                 if (unlikely(dlen < to_copy)) {
 581                         remain = to_copy - dlen;
 582                         addr = desc->addr + dlen;
 583
 584                         while (remain) {
 585                                 len = remain;
 586                                 src = IOVA_TO_VVA(uint8_t *, vc_req, addr, &len,
 587                                                 VHOST_ACCESS_RO);
 588                                 if (unlikely(!src || !len)) {
 589                                         VC_LOG_ERR("Failed to map descriptor");
 590                                         return -1;
 591                                 }
 592
 593                                 rte_memcpy(data, src, len);
 594                                 addr += len;
 595                                 remain -= len;
 596                                 data += len;
 597                         }
 598                 }
 599
 600                 left -= to_copy;
 601         }
 602
 603         if (unlikely(left > 0)) {
 604                 VC_LOG_ERR("Incorrect virtio descriptor");
 605                 return -1;
 606         }
 607
 608         *cur_desc = &vc_req->head[desc->next];
 609
 610         return 0;
 611 }
 612
 613 static __rte_always_inline void *
 614 get_data_ptr(struct vhost_crypto_data_req *vc_req, struct vring_desc **cur_desc,
 615                 uint32_t size, uint8_t perm)
 616 {
 617         void *data;
 618         uint64_t dlen = (*cur_desc)->len;
 619
 620         data = IOVA_TO_VVA(void *, vc_req, (*cur_desc)->addr, &dlen, perm);
 621         if (unlikely(!data || dlen != (*cur_desc)->len)) {
 622                 VC_LOG_ERR("Failed to map object");
 623                 return NULL;
 624         }
 625
 626         if (unlikely(move_desc(vc_req->head, cur_desc, size) < 0))
 627                 return NULL;
 628
 629         return data;
 630 }
 631
 632 static int
 633 write_back_data(struct rte_crypto_op *op, struct vhost_crypto_data_req *vc_req)
 634 {
 635         struct rte_mbuf *mbuf = op->sym->m_dst;
 636         struct vring_desc *head = vc_req->head;
 637         struct vring_desc *desc = vc_req->wb_desc;
 638         int left = vc_req->wb_len;
 639         uint32_t to_write;
 640         uint8_t *src_data = mbuf->buf_addr, *dst;
 641         uint64_t dlen;
 642
 643         rte_prefetch0(&head[desc->next]);
 644         to_write = RTE_MIN(desc->len, (uint32_t)left);
 645         dlen = desc->len;
 646         dst = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr, &dlen,
 647                         VHOST_ACCESS_RW);
 648         if (unlikely(!dst || dlen != desc->len)) {
 649                 VC_LOG_ERR("Failed to map descriptor");
 650                 return -1;
 651         }
 652
 653         rte_memcpy(dst, src_data, to_write);
 654         left -= to_write;
 655         src_data += to_write;
 656
 657         while ((desc->flags & VRING_DESC_F_NEXT) && left > 0) {
 658                 desc = &head[desc->next];
 659                 rte_prefetch0(&head[desc->next]);
 660                 to_write = RTE_MIN(desc->len, (uint32_t)left);
 661                 dlen = desc->len;
 662                 dst = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr, &dlen,
 663                                 VHOST_ACCESS_RW);
 664                 if (unlikely(!dst || dlen != desc->len)) {
 665                         VC_LOG_ERR("Failed to map descriptor");
 666                         return -1;
 667                 }
 668
 669                 rte_memcpy(dst, src_data, to_write);
 670                 left -= to_write;
 671                 src_data += to_write;
 672         }
 673
 674         if (unlikely(left < 0)) {
 675                 VC_LOG_ERR("Incorrect virtio descriptor");
 676                 return -1;
 677         }
 678
 679         return 0;
 680 }
 681
 682 static uint8_t
 683 prepare_sym_cipher_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op,
 684                 struct vhost_crypto_data_req *vc_req,
 685                 struct virtio_crypto_cipher_data_req *cipher,
 686                 struct vring_desc *cur_desc)
 687 {
 688         struct vring_desc *desc = cur_desc;
 689         struct rte_mbuf *m_src = op->sym->m_src, *m_dst = op->sym->m_dst;
 690         uint8_t *iv_data = rte_crypto_op_ctod_offset(op, uint8_t *, IV_OFFSET);
 691         uint8_t ret = 0;
 692
 693         /* prepare */
 694         /* iv */
 695         if (unlikely(copy_data(iv_data, vc_req, &desc,
 696                         cipher->para.iv_len) < 0)) {
 697                 ret = VIRTIO_CRYPTO_BADMSG;
 698                 goto error_exit;
 699         }
 700
 701         m_src->data_len = cipher->para.src_data_len;
 702
 703         switch (vcrypto->option) {
 704         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
 705                 m_src->buf_iova = gpa_to_hpa(vcrypto->dev, desc->addr,
 706                                 cipher->para.src_data_len);
 707                 m_src->buf_addr = get_data_ptr(vc_req, &desc,
 708                                 cipher->para.src_data_len, VHOST_ACCESS_RO);
 709                 if (unlikely(m_src->buf_iova == 0 ||
 710                                 m_src->buf_addr == NULL)) {
 711                         VC_LOG_ERR("zero_copy may fail due to cross page data");
 712                         ret = VIRTIO_CRYPTO_ERR;
 713                         goto error_exit;
 714                 }
 715                 break;
 716         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
 717                 if (unlikely(cipher->para.src_data_len >
 718                                 RTE_MBUF_DEFAULT_BUF_SIZE)) {
 719                         VC_LOG_ERR("Not enough space to do data copy");
 720                         ret = VIRTIO_CRYPTO_ERR;
 721                         goto error_exit;
 722                 }
 723                 if (unlikely(copy_data(rte_pktmbuf_mtod(m_src, uint8_t *),
 724                                 vc_req, &desc, cipher->para.src_data_len)
 725                                 < 0)) {
 726                         ret = VIRTIO_CRYPTO_BADMSG;
 727                         goto error_exit;
 728                 }
 729                 break;
 730         default:
 731                 ret = VIRTIO_CRYPTO_BADMSG;
 732                 goto error_exit;
 733         }
 734
 735         /* dst */
 736         desc = find_write_desc(vc_req->head, desc);
 737         if (unlikely(!desc)) {
 738                 VC_LOG_ERR("Cannot find write location");
 739                 ret = VIRTIO_CRYPTO_BADMSG;
 740                 goto error_exit;
 741         }
 742
 743         switch (vcrypto->option) {
 744         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
 745                 m_dst->buf_iova = gpa_to_hpa(vcrypto->dev,
 746                                 desc->addr, cipher->para.dst_data_len);
 747                 m_dst->buf_addr = get_data_ptr(vc_req, &desc,
 748                                 cipher->para.dst_data_len, VHOST_ACCESS_RW);
 749                 if (unlikely(m_dst->buf_iova == 0 || m_dst->buf_addr == NULL)) {
 750                         VC_LOG_ERR("zero_copy may fail due to cross page data");
 751                         ret = VIRTIO_CRYPTO_ERR;
 752                         goto error_exit;
 753                 }
 754
 755                 m_dst->data_len = cipher->para.dst_data_len;
 756                 break;
 757         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
 758                 vc_req->wb_desc = desc;
 759                 vc_req->wb_len = cipher->para.dst_data_len;
 760                 if (unlikely(move_desc(vc_req->head, &desc,
 761                                 vc_req->wb_len) < 0)) {
 762                         ret = VIRTIO_CRYPTO_ERR;
 763                         goto error_exit;
 764                 }
 765                 break;
 766         default:
 767                 ret = VIRTIO_CRYPTO_BADMSG;
 768                 goto error_exit;
 769         }
 770
 771         /* src data */
 772         op->type = RTE_CRYPTO_OP_TYPE_SYMMETRIC;
 773         op->sess_type = RTE_CRYPTO_OP_WITH_SESSION;
 774
 775         op->sym->cipher.data.offset = 0;
 776         op->sym->cipher.data.length = cipher->para.src_data_len;
 777
 778         vc_req->inhdr = get_data_ptr(vc_req, &desc, INHDR_LEN, VHOST_ACCESS_WO);
 779         if (unlikely(vc_req->inhdr == NULL)) {
 780                 ret = VIRTIO_CRYPTO_BADMSG;
 781                 goto error_exit;
 782         }
 783
 784         vc_req->inhdr->status = VIRTIO_CRYPTO_OK;
 785         vc_req->len = cipher->para.dst_data_len + INHDR_LEN;
 786
 787         return 0;
 788
 789 error_exit:
 790         vc_req->len = INHDR_LEN;
 791         return ret;
 792 }
 793
 794 static uint8_t
 795 prepare_sym_chain_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op,
 796                 struct vhost_crypto_data_req *vc_req,
 797                 struct virtio_crypto_alg_chain_data_req *chain,
 798                 struct vring_desc *cur_desc)
 799 {
 800         struct vring_desc *desc = cur_desc;
 801         struct rte_mbuf *m_src = op->sym->m_src, *m_dst = op->sym->m_dst;
 802         uint8_t *iv_data = rte_crypto_op_ctod_offset(op, uint8_t *, IV_OFFSET);
 803         uint32_t digest_offset;
 804         void *digest_addr;
 805         uint8_t ret = 0;
 806
 807         /* prepare */
 808         /* iv */
 809         if (unlikely(copy_data(iv_data, vc_req, &desc,
 810                         chain->para.iv_len) < 0)) {
 811                 ret = VIRTIO_CRYPTO_BADMSG;
 812                 goto error_exit;
 813         }
 814
 815         m_src->data_len = chain->para.src_data_len;
 816         m_dst->data_len = chain->para.dst_data_len;
 817
 818         switch (vcrypto->option) {
 819         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
 820                 m_src->buf_iova = gpa_to_hpa(vcrypto->dev, desc->addr,
 821                                 chain->para.src_data_len);
 822                 m_src->buf_addr = get_data_ptr(vc_req, &desc,
 823                                 chain->para.src_data_len, VHOST_ACCESS_RO);
 824                 if (unlikely(m_src->buf_iova == 0 || m_src->buf_addr == NULL)) {
 825                         VC_LOG_ERR("zero_copy may fail due to cross page data");
 826                         ret = VIRTIO_CRYPTO_ERR;
 827                         goto error_exit;
 828                 }
 829                 break;
 830         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
 831                 if (unlikely(chain->para.src_data_len >
 832                                 RTE_MBUF_DEFAULT_BUF_SIZE)) {
 833                         VC_LOG_ERR("Not enough space to do data copy");
 834                         ret = VIRTIO_CRYPTO_ERR;
 835                         goto error_exit;
 836                 }
 837                 if (unlikely(copy_data(rte_pktmbuf_mtod(m_src, uint8_t *),
 838                                 vc_req, &desc, chain->para.src_data_len)) < 0) {
 839                         ret = VIRTIO_CRYPTO_BADMSG;
 840                         goto error_exit;
 841                 }
 842                 break;
 843         default:
 844                 ret = VIRTIO_CRYPTO_BADMSG;
 845                 goto error_exit;
 846         }
 847
 848         /* dst */
 849         desc = find_write_desc(vc_req->head, desc);
 850         if (unlikely(!desc)) {
 851                 VC_LOG_ERR("Cannot find write location");
 852                 ret = VIRTIO_CRYPTO_BADMSG;
 853                 goto error_exit;
 854         }
 855
 856         switch (vcrypto->option) {
 857         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
 858                 m_dst->buf_iova = gpa_to_hpa(vcrypto->dev,
 859                                 desc->addr, chain->para.dst_data_len);
 860                 m_dst->buf_addr = get_data_ptr(vc_req, &desc,
 861                                 chain->para.dst_data_len, VHOST_ACCESS_RW);
 862                 if (unlikely(m_dst->buf_iova == 0 || m_dst->buf_addr == NULL)) {
 863                         VC_LOG_ERR("zero_copy may fail due to cross page data");
 864                         ret = VIRTIO_CRYPTO_ERR;
 865                         goto error_exit;
 866                 }
 867
 868                 op->sym->auth.digest.phys_addr = gpa_to_hpa(vcrypto->dev,
 869                                 desc->addr, chain->para.hash_result_len);
 870                 op->sym->auth.digest.data = get_data_ptr(vc_req, &desc,
 871                                 chain->para.hash_result_len, VHOST_ACCESS_RW);
 872                 if (unlikely(op->sym->auth.digest.phys_addr == 0)) {
 873                         VC_LOG_ERR("zero_copy may fail due to cross page data");
 874                         ret = VIRTIO_CRYPTO_ERR;
 875                         goto error_exit;
 876                 }
 877                 break;
 878         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
 879                 digest_offset = m_dst->data_len;
 880                 digest_addr = rte_pktmbuf_mtod_offset(m_dst, void *,
 881                                 digest_offset);
 882
 883                 vc_req->wb_desc = desc;
 884                 vc_req->wb_len = m_dst->data_len + chain->para.hash_result_len;
 885
 886                 if (unlikely(move_desc(vc_req->head, &desc,
 887                                 chain->para.dst_data_len) < 0)) {
 888                         ret = VIRTIO_CRYPTO_BADMSG;
 889                         goto error_exit;
 890                 }
 891
 892                 if (unlikely(copy_data(digest_addr, vc_req, &desc,
 893                                 chain->para.hash_result_len)) < 0) {
 894                         ret = VIRTIO_CRYPTO_BADMSG;
 895                         goto error_exit;
 896                 }
 897
 898                 op->sym->auth.digest.data = digest_addr;
 899                 op->sym->auth.digest.phys_addr = rte_pktmbuf_iova_offset(m_dst,
 900                                 digest_offset);
 901                 break;
 902         default:
 903                 ret = VIRTIO_CRYPTO_BADMSG;
 904                 goto error_exit;
 905         }
 906
 907         /* record inhdr */
 908         vc_req->inhdr = get_data_ptr(vc_req, &desc, INHDR_LEN, VHOST_ACCESS_WO);
 909         if (unlikely(vc_req->inhdr == NULL)) {
 910                 ret = VIRTIO_CRYPTO_BADMSG;
 911                 goto error_exit;
 912         }
 913
 914         vc_req->inhdr->status = VIRTIO_CRYPTO_OK;
 915
 916         op->type = RTE_CRYPTO_OP_TYPE_SYMMETRIC;
 917         op->sess_type = RTE_CRYPTO_OP_WITH_SESSION;
 918
 919         op->sym->cipher.data.offset = chain->para.cipher_start_src_offset;
 920         op->sym->cipher.data.length = chain->para.src_data_len -
 921                         chain->para.cipher_start_src_offset;
 922
 923         op->sym->auth.data.offset = chain->para.hash_start_src_offset;
 924         op->sym->auth.data.length = chain->para.len_to_hash;
 925
 926         vc_req->len = chain->para.dst_data_len + chain->para.hash_result_len +
 927                         INHDR_LEN;
 928         return 0;
 929
 930 error_exit:
 931         vc_req->len = INHDR_LEN;
 932         return ret;
 933 }
 934
 935 /**
 936  * Process on descriptor
 937  */
 938 static __rte_always_inline int
 939 vhost_crypto_process_one_req(struct vhost_crypto *vcrypto,
 940                 struct vhost_virtqueue *vq, struct rte_crypto_op *op,
 941                 struct vring_desc *head, uint16_t desc_idx)
 942 {
 943         struct vhost_crypto_data_req *vc_req = rte_mbuf_to_priv(op->sym->m_src);
 944         struct rte_cryptodev_sym_session *session;
 945         struct virtio_crypto_op_data_req *req, tmp_req;
 946         struct virtio_crypto_inhdr *inhdr;
 947         struct vring_desc *desc = NULL;
 948         uint64_t session_id;
 949         uint64_t dlen;
 950         int err = 0;
 951
 952         vc_req->desc_idx = desc_idx;
 953         vc_req->dev = vcrypto->dev;
 954         vc_req->vq = vq;
 955
 956         if (likely(head->flags & VRING_DESC_F_INDIRECT)) {
 957                 dlen = head->len;
 958                 desc = IOVA_TO_VVA(struct vring_desc *, vc_req, head->addr,
 959                                 &dlen, VHOST_ACCESS_RO);
 960                 if (unlikely(!desc || dlen != head->len))
 961                         return -1;
 962                 desc_idx = 0;
 963                 head = desc;
 964         } else {
 965                 desc = head;
 966         }
 967
 968         vc_req->head = head;
 969         vc_req->zero_copy = vcrypto->option;
 970
 971         req = get_data_ptr(vc_req, &desc, sizeof(*req), VHOST_ACCESS_RO);
 972         if (unlikely(req == NULL)) {
 973                 switch (vcrypto->option) {
 974                 case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
 975                         err = VIRTIO_CRYPTO_BADMSG;
 976                         VC_LOG_ERR("Invalid descriptor");
 977                         goto error_exit;
 978                 case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
 979                         req = &tmp_req;
 980                         if (unlikely(copy_data(req, vc_req, &desc, sizeof(*req))
 981                                         < 0)) {
 982                                 err = VIRTIO_CRYPTO_BADMSG;
 983                                 VC_LOG_ERR("Invalid descriptor");
 984                                 goto error_exit;
 985                         }
 986                         break;
 987                 default:
 988                         err = VIRTIO_CRYPTO_ERR;
 989                         VC_LOG_ERR("Invalid option");
 990                         goto error_exit;
 991                 }
 992         }
 993
 994         switch (req->header.opcode) {
 995         case VIRTIO_CRYPTO_CIPHER_ENCRYPT:
 996         case VIRTIO_CRYPTO_CIPHER_DECRYPT:
 997                 session_id = req->header.session_id;
 998
 999                 /* one branch to avoid unnecessary table lookup */
1000                 if (vcrypto->cache_session_id != session_id) {
1001                         err = rte_hash_lookup_data(vcrypto->session_map,
1002                                         &session_id, (void **)&session);
1003                         if (unlikely(err < 0)) {
1004                                 err = VIRTIO_CRYPTO_ERR;
1005                                 VC_LOG_ERR("Failed to find session %"PRIu64,
1006                                                 session_id);
1007                                 goto error_exit;
1008                         }
1009
1010                         vcrypto->cache_session = session;
1011                         vcrypto->cache_session_id = session_id;
1012                 }
1013
1014                 session = vcrypto->cache_session;
1015
1016                 err = rte_crypto_op_attach_sym_session(op, session);
1017                 if (unlikely(err < 0)) {
1018                         err = VIRTIO_CRYPTO_ERR;
1019                         VC_LOG_ERR("Failed to attach session to op");
1020                         goto error_exit;
1021                 }
1022
1023                 switch (req->u.sym_req.op_type) {
1024                 case VIRTIO_CRYPTO_SYM_OP_NONE:
1025                         err = VIRTIO_CRYPTO_NOTSUPP;
1026                         break;
1027                 case VIRTIO_CRYPTO_SYM_OP_CIPHER:
1028                         err = prepare_sym_cipher_op(vcrypto, op, vc_req,
1029                                         &req->u.sym_req.u.cipher, desc);
1030                         break;
1031                 case VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING:
1032                         err = prepare_sym_chain_op(vcrypto, op, vc_req,
1033                                         &req->u.sym_req.u.chain, desc);
1034                         break;
1035                 }
1036                 if (unlikely(err != 0)) {
1037                         VC_LOG_ERR("Failed to process sym request");
1038                         goto error_exit;
1039                 }
1040                 break;
1041         default:
1042                 VC_LOG_ERR("Unsupported symmetric crypto request type %u",
1043                                 req->header.opcode);
1044                 goto error_exit;
1045         }
1046
1047         return 0;
1048
1049 error_exit:
1050
1051         inhdr = reach_inhdr(vc_req, desc);
1052         if (likely(inhdr != NULL))
1053                 inhdr->status = (uint8_t)err;
1054
1055         return -1;
1056 }
1057
1058 static __rte_always_inline struct vhost_virtqueue *
1059 vhost_crypto_finalize_one_request(struct rte_crypto_op *op,
1060                 struct vhost_virtqueue *old_vq)
1061 {
1062         struct rte_mbuf *m_src = op->sym->m_src;
1063         struct rte_mbuf *m_dst = op->sym->m_dst;
1064         struct vhost_crypto_data_req *vc_req = rte_mbuf_to_priv(m_src);
1065         uint16_t desc_idx;
1066         int ret = 0;
1067
1068         if (unlikely(!vc_req)) {
1069                 VC_LOG_ERR("Failed to retrieve vc_req");
1070                 return NULL;
1071         }
1072
1073         if (old_vq && (vc_req->vq != old_vq))
1074                 return vc_req->vq;
1075
1076         desc_idx = vc_req->desc_idx;
1077
1078         if (unlikely(op->status != RTE_CRYPTO_OP_STATUS_SUCCESS))
1079                 vc_req->inhdr->status = VIRTIO_CRYPTO_ERR;
1080         else {
1081                 if (vc_req->zero_copy == 0) {
1082                         ret = write_back_data(op, vc_req);
1083                         if (unlikely(ret != 0))
1084                                 vc_req->inhdr->status = VIRTIO_CRYPTO_ERR;
1085                 }
1086         }
1087
1088         vc_req->vq->used->ring[desc_idx].id = desc_idx;
1089         vc_req->vq->used->ring[desc_idx].len = vc_req->len;
1090
1091         rte_mempool_put(m_dst->pool, (void *)m_dst);
1092         rte_mempool_put(m_src->pool, (void *)m_src);
1093
1094         return vc_req->vq;
1095 }
1096
1097 static __rte_always_inline uint16_t
1098 vhost_crypto_complete_one_vm_requests(struct rte_crypto_op **ops,
1099                 uint16_t nb_ops, int *callfd)
1100 {
1101         uint16_t processed = 1;
1102         struct vhost_virtqueue *vq, *tmp_vq;
1103
1104         if (unlikely(nb_ops == 0))
1105                 return 0;
1106
1107         vq = vhost_crypto_finalize_one_request(ops[0], NULL);
1108         if (unlikely(vq == NULL))
1109                 return 0;
1110         tmp_vq = vq;
1111
1112         while ((processed < nb_ops)) {
1113                 tmp_vq = vhost_crypto_finalize_one_request(ops[processed],
1114                                 tmp_vq);
1115
1116                 if (unlikely(vq != tmp_vq))
1117                         break;
1118
1119                 processed++;
1120         }
1121
1122         *callfd = vq->callfd;
1123
1124         *(volatile uint16_t *)&vq->used->idx += processed;
1125
1126         return processed;
1127 }
1128
1129 int __rte_experimental
1130 rte_vhost_crypto_create(int vid, uint8_t cryptodev_id,
1131                 struct rte_mempool *sess_pool, int socket_id)
1132 {
1133         struct virtio_net *dev = get_device(vid);
1134         struct rte_hash_parameters params = {0};
1135         struct vhost_crypto *vcrypto;
1136         char name[128];
1137         int ret;
1138
1139         if (!dev) {
1140                 VC_LOG_ERR("Invalid vid %i", vid);
1141                 return -EINVAL;
1142         }
1143
1144         ret = rte_vhost_driver_set_features(dev->ifname,
1145                         VIRTIO_CRYPTO_FEATURES);
1146         if (ret < 0) {
1147                 VC_LOG_ERR("Error setting features");
1148                 return -1;
1149         }
1150
1151         vcrypto = rte_zmalloc_socket(NULL, sizeof(*vcrypto),
1152                         RTE_CACHE_LINE_SIZE, socket_id);
1153         if (!vcrypto) {
1154                 VC_LOG_ERR("Insufficient memory");
1155                 return -ENOMEM;
1156         }
1157
1158         vcrypto->sess_pool = sess_pool;
1159         vcrypto->cid = cryptodev_id;
1160         vcrypto->cache_session_id = UINT64_MAX;
1161         vcrypto->last_session_id = 1;
1162         vcrypto->dev = dev;
1163         vcrypto->option = RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE;
1164
1165         snprintf(name, 127, "HASH_VHOST_CRYPT_%u", (uint32_t)vid);
1166         params.name = name;
1167         params.entries = VHOST_CRYPTO_SESSION_MAP_ENTRIES;
1168         params.hash_func = rte_jhash;
1169         params.key_len = sizeof(uint64_t);
1170         params.socket_id = socket_id;
1171         vcrypto->session_map = rte_hash_create(&params);
1172         if (!vcrypto->session_map) {
1173                 VC_LOG_ERR("Failed to creath session map");
1174                 ret = -ENOMEM;
1175                 goto error_exit;
1176         }
1177
1178         snprintf(name, 127, "MBUF_POOL_VM_%u", (uint32_t)vid);
1179         vcrypto->mbuf_pool = rte_pktmbuf_pool_create(name,
1180                         VHOST_CRYPTO_MBUF_POOL_SIZE, 512,
1181                         sizeof(struct vhost_crypto_data_req),
1182                         RTE_MBUF_DEFAULT_DATAROOM * 2 + RTE_PKTMBUF_HEADROOM,
1183                         rte_socket_id());
1184         if (!vcrypto->mbuf_pool) {
1185                 VC_LOG_ERR("Failed to creath mbuf pool");
1186                 ret = -ENOMEM;
1187                 goto error_exit;
1188         }
1189
1190         dev->extern_data = vcrypto;
1191         dev->extern_ops.pre_msg_handle = NULL;
1192         dev->extern_ops.post_msg_handle = vhost_crypto_msg_post_handler;
1193
1194         return 0;
1195
1196 error_exit:
1197         if (vcrypto->session_map)
1198                 rte_hash_free(vcrypto->session_map);
1199         if (vcrypto->mbuf_pool)
1200                 rte_mempool_free(vcrypto->mbuf_pool);
1201
1202         rte_free(vcrypto);
1203
1204         return ret;
1205 }
1206
1207 int __rte_experimental
1208 rte_vhost_crypto_free(int vid)
1209 {
1210         struct virtio_net *dev = get_device(vid);
1211         struct vhost_crypto *vcrypto;
1212
1213         if (unlikely(dev == NULL)) {
1214                 VC_LOG_ERR("Invalid vid %i", vid);
1215                 return -EINVAL;
1216         }
1217
1218         vcrypto = dev->extern_data;
1219         if (unlikely(vcrypto == NULL)) {
1220                 VC_LOG_ERR("Cannot find required data, is it initialized?");
1221                 return -ENOENT;
1222         }
1223
1224         rte_hash_free(vcrypto->session_map);
1225         rte_mempool_free(vcrypto->mbuf_pool);
1226         rte_free(vcrypto);
1227
1228         dev->extern_data = NULL;
1229         dev->extern_ops.pre_msg_handle = NULL;
1230         dev->extern_ops.post_msg_handle = NULL;
1231
1232         return 0;
1233 }
1234
1235 int __rte_experimental
1236 rte_vhost_crypto_set_zero_copy(int vid, enum rte_vhost_crypto_zero_copy option)
1237 {
1238         struct virtio_net *dev = get_device(vid);
1239         struct vhost_crypto *vcrypto;
1240
1241         if (unlikely(dev == NULL)) {
1242                 VC_LOG_ERR("Invalid vid %i", vid);
1243                 return -EINVAL;
1244         }
1245
1246         if (unlikely((uint32_t)option >=
1247                                 RTE_VHOST_CRYPTO_MAX_ZERO_COPY_OPTIONS)) {
1248                 VC_LOG_ERR("Invalid option %i", option);
1249                 return -EINVAL;
1250         }
1251
1252         vcrypto = (struct vhost_crypto *)dev->extern_data;
1253         if (unlikely(vcrypto == NULL)) {
1254                 VC_LOG_ERR("Cannot find required data, is it initialized?");
1255                 return -ENOENT;
1256         }
1257
1258         if (vcrypto->option == (uint8_t)option)
1259                 return 0;
1260
1261         if (!(rte_mempool_full(vcrypto->mbuf_pool))) {
1262                 VC_LOG_ERR("Cannot update zero copy as mempool is not full");
1263                 return -EINVAL;
1264         }
1265
1266         vcrypto->option = (uint8_t)option;
1267
1268         return 0;
1269 }
1270
1271 uint16_t __rte_experimental
1272 rte_vhost_crypto_fetch_requests(int vid, uint32_t qid,
1273                 struct rte_crypto_op **ops, uint16_t nb_ops)
1274 {
1275         struct rte_mbuf *mbufs[VHOST_CRYPTO_MAX_BURST_SIZE * 2];
1276         struct virtio_net *dev = get_device(vid);
1277         struct vhost_crypto *vcrypto;
1278         struct vhost_virtqueue *vq;
1279         uint16_t avail_idx;
1280         uint16_t start_idx;
1281         uint16_t required;
1282         uint16_t count;
1283         uint16_t i;
1284
1285         if (unlikely(dev == NULL)) {
1286                 VC_LOG_ERR("Invalid vid %i", vid);
1287                 return -EINVAL;
1288         }
1289
1290         if (unlikely(qid >= VHOST_MAX_QUEUE_PAIRS)) {
1291                 VC_LOG_ERR("Invalid qid %u", qid);
1292                 return -EINVAL;
1293         }
1294
1295         vcrypto = (struct vhost_crypto *)dev->extern_data;
1296         if (unlikely(vcrypto == NULL)) {
1297                 VC_LOG_ERR("Cannot find required data, is it initialized?");
1298                 return -ENOENT;
1299         }
1300
1301         vq = dev->virtqueue[qid];
1302
1303         avail_idx = *((volatile uint16_t *)&vq->avail->idx);
1304         start_idx = vq->last_used_idx;
1305         count = avail_idx - start_idx;
1306         count = RTE_MIN(count, VHOST_CRYPTO_MAX_BURST_SIZE);
1307         count = RTE_MIN(count, nb_ops);
1308
1309         if (unlikely(count == 0))
1310                 return 0;
1311
1312         /* for zero copy, we need 2 empty mbufs for src and dst, otherwise
1313          * we need only 1 mbuf as src and dst
1314          */
1315         required = count * 2;
1316         if (unlikely(rte_mempool_get_bulk(vcrypto->mbuf_pool, (void **)mbufs,
1317                         required) < 0)) {
1318                 VC_LOG_ERR("Insufficient memory");
1319                 return -ENOMEM;
1320         }
1321
1322         for (i = 0; i < count; i++) {
1323                 uint16_t used_idx = (start_idx + i) & (vq->size - 1);
1324                 uint16_t desc_idx = vq->avail->ring[used_idx];
1325                 struct vring_desc *head = &vq->desc[desc_idx];
1326                 struct rte_crypto_op *op = ops[i];
1327
1328                 op->sym->m_src = mbufs[i * 2];
1329                 op->sym->m_dst = mbufs[i * 2 + 1];
1330                 op->sym->m_src->data_off = 0;
1331                 op->sym->m_dst->data_off = 0;
1332
1333                 if (unlikely(vhost_crypto_process_one_req(vcrypto, vq, op, head,
1334                                 desc_idx)) < 0)
1335                         break;
1336         }
1337
1338         vq->last_used_idx += i;
1339
1340         return i;
1341 }
1342
1343 uint16_t __rte_experimental
1344 rte_vhost_crypto_finalize_requests(struct rte_crypto_op **ops,
1345                 uint16_t nb_ops, int *callfds, uint16_t *nb_callfds)
1346 {
1347         struct rte_crypto_op **tmp_ops = ops;
1348         uint16_t count = 0, left = nb_ops;
1349         int callfd;
1350         uint16_t idx = 0;
1351
1352         while (left) {
1353                 count = vhost_crypto_complete_one_vm_requests(tmp_ops, left,
1354                                 &callfd);
1355                 if (unlikely(count == 0))
1356                         break;
1357
1358                 tmp_ops = &tmp_ops[count];
1359                 left -= count;
1360
1361                 callfds[idx++] = callfd;
1362
1363                 if (unlikely(idx >= VIRTIO_CRYPTO_MAX_NUM_BURST_VQS)) {
1364                         VC_LOG_ERR("Too many vqs");
1365                         break;
1366                 }
1367         }
1368
1369         *nb_callfds = idx;
1370
1371         return nb_ops - left;
1372 }