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         struct rte_mempool *sess_priv_pool;
 202         struct rte_mempool *wb_pool;
 203
 204         /** DPDK cryptodev ID */
 205         uint8_t cid;
 206         uint16_t nb_qps;
 207
 208         uint64_t last_session_id;
 209
 210         uint64_t cache_session_id;
 211         struct rte_cryptodev_sym_session *cache_session;
 212         /** socket id for the device */
 213         int socket_id;
 214
 215         struct virtio_net *dev;
 216
 217         uint8_t option;
 218 } __rte_cache_aligned;
 219
 220 struct vhost_crypto_writeback_data {
 221         uint8_t *src;
 222         uint8_t *dst;
 223         uint64_t len;
 224         struct vhost_crypto_writeback_data *next;
 225 };
 226
 227 struct vhost_crypto_data_req {
 228         struct vring_desc *head;
 229         struct virtio_net *dev;
 230         struct virtio_crypto_inhdr *inhdr;
 231         struct vhost_virtqueue *vq;
 232         struct vhost_crypto_writeback_data *wb;
 233         struct rte_mempool *wb_pool;
 234         uint16_t desc_idx;
 235         uint16_t len;
 236         uint16_t zero_copy;
 237 };
 238
 239 static int
 240 transform_cipher_param(struct rte_crypto_sym_xform *xform,
 241                 VhostUserCryptoSessionParam *param)
 242 {
 243         int ret;
 244
 245         ret = cipher_algo_transform(param->cipher_algo);
 246         if (unlikely(ret < 0))
 247                 return ret;
 248
 249         xform->type = RTE_CRYPTO_SYM_XFORM_CIPHER;
 250         xform->cipher.algo = (enum rte_crypto_cipher_algorithm)ret;
 251         xform->cipher.key.length = param->cipher_key_len;
 252         if (xform->cipher.key.length > 0)
 253                 xform->cipher.key.data = param->cipher_key_buf;
 254         if (param->dir == VIRTIO_CRYPTO_OP_ENCRYPT)
 255                 xform->cipher.op = RTE_CRYPTO_CIPHER_OP_ENCRYPT;
 256         else if (param->dir == VIRTIO_CRYPTO_OP_DECRYPT)
 257                 xform->cipher.op = RTE_CRYPTO_CIPHER_OP_DECRYPT;
 258         else {
 259                 VC_LOG_DBG("Bad operation type");
 260                 return -VIRTIO_CRYPTO_BADMSG;
 261         }
 262
 263         ret = get_iv_len(xform->cipher.algo);
 264         if (unlikely(ret < 0))
 265                 return ret;
 266         xform->cipher.iv.length = (uint16_t)ret;
 267         xform->cipher.iv.offset = IV_OFFSET;
 268         return 0;
 269 }
 270
 271 static int
 272 transform_chain_param(struct rte_crypto_sym_xform *xforms,
 273                 VhostUserCryptoSessionParam *param)
 274 {
 275         struct rte_crypto_sym_xform *xform_cipher, *xform_auth;
 276         int ret;
 277
 278         switch (param->chaining_dir) {
 279         case VIRTIO_CRYPTO_SYM_ALG_CHAIN_ORDER_HASH_THEN_CIPHER:
 280                 xform_auth = xforms;
 281                 xform_cipher = xforms->next;
 282                 xform_cipher->cipher.op = RTE_CRYPTO_CIPHER_OP_DECRYPT;
 283                 xform_auth->auth.op = RTE_CRYPTO_AUTH_OP_VERIFY;
 284                 break;
 285         case VIRTIO_CRYPTO_SYM_ALG_CHAIN_ORDER_CIPHER_THEN_HASH:
 286                 xform_cipher = xforms;
 287                 xform_auth = xforms->next;
 288                 xform_cipher->cipher.op = RTE_CRYPTO_CIPHER_OP_ENCRYPT;
 289                 xform_auth->auth.op = RTE_CRYPTO_AUTH_OP_GENERATE;
 290                 break;
 291         default:
 292                 return -VIRTIO_CRYPTO_BADMSG;
 293         }
 294
 295         /* cipher */
 296         ret = cipher_algo_transform(param->cipher_algo);
 297         if (unlikely(ret < 0))
 298                 return ret;
 299         xform_cipher->type = RTE_CRYPTO_SYM_XFORM_CIPHER;
 300         xform_cipher->cipher.algo = (enum rte_crypto_cipher_algorithm)ret;
 301         xform_cipher->cipher.key.length = param->cipher_key_len;
 302         xform_cipher->cipher.key.data = param->cipher_key_buf;
 303         ret = get_iv_len(xform_cipher->cipher.algo);
 304         if (unlikely(ret < 0))
 305                 return ret;
 306         xform_cipher->cipher.iv.length = (uint16_t)ret;
 307         xform_cipher->cipher.iv.offset = IV_OFFSET;
 308
 309         /* auth */
 310         xform_auth->type = RTE_CRYPTO_SYM_XFORM_AUTH;
 311         ret = auth_algo_transform(param->hash_algo);
 312         if (unlikely(ret < 0))
 313                 return ret;
 314         xform_auth->auth.algo = (enum rte_crypto_auth_algorithm)ret;
 315         xform_auth->auth.digest_length = param->digest_len;
 316         xform_auth->auth.key.length = param->auth_key_len;
 317         xform_auth->auth.key.data = param->auth_key_buf;
 318
 319         return 0;
 320 }
 321
 322 static void
 323 vhost_crypto_create_sess(struct vhost_crypto *vcrypto,
 324                 VhostUserCryptoSessionParam *sess_param)
 325 {
 326         struct rte_crypto_sym_xform xform1 = {0}, xform2 = {0};
 327         struct rte_cryptodev_sym_session *session;
 328         int ret;
 329
 330         switch (sess_param->op_type) {
 331         case VIRTIO_CRYPTO_SYM_OP_NONE:
 332         case VIRTIO_CRYPTO_SYM_OP_CIPHER:
 333                 ret = transform_cipher_param(&xform1, sess_param);
 334                 if (unlikely(ret)) {
 335                         VC_LOG_ERR("Error transform session msg (%i)", ret);
 336                         sess_param->session_id = ret;
 337                         return;
 338                 }
 339                 break;
 340         case VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING:
 341                 if (unlikely(sess_param->hash_mode !=
 342                                 VIRTIO_CRYPTO_SYM_HASH_MODE_AUTH)) {
 343                         sess_param->session_id = -VIRTIO_CRYPTO_NOTSUPP;
 344                         VC_LOG_ERR("Error transform session message (%i)",
 345                                         -VIRTIO_CRYPTO_NOTSUPP);
 346                         return;
 347                 }
 348
 349                 xform1.next = &xform2;
 350
 351                 ret = transform_chain_param(&xform1, sess_param);
 352                 if (unlikely(ret)) {
 353                         VC_LOG_ERR("Error transform session message (%i)", ret);
 354                         sess_param->session_id = ret;
 355                         return;
 356                 }
 357
 358                 break;
 359         default:
 360                 VC_LOG_ERR("Algorithm not yet supported");
 361                 sess_param->session_id = -VIRTIO_CRYPTO_NOTSUPP;
 362                 return;
 363         }
 364
 365         session = rte_cryptodev_sym_session_create(vcrypto->sess_pool);
 366         if (!session) {
 367                 VC_LOG_ERR("Failed to create session");
 368                 sess_param->session_id = -VIRTIO_CRYPTO_ERR;
 369                 return;
 370         }
 371
 372         if (rte_cryptodev_sym_session_init(vcrypto->cid, session, &xform1,
 373                         vcrypto->sess_priv_pool) < 0) {
 374                 VC_LOG_ERR("Failed to initialize session");
 375                 sess_param->session_id = -VIRTIO_CRYPTO_ERR;
 376                 return;
 377         }
 378
 379         /* insert hash to map */
 380         if (rte_hash_add_key_data(vcrypto->session_map,
 381                         &vcrypto->last_session_id, session) < 0) {
 382                 VC_LOG_ERR("Failed to insert session to hash table");
 383
 384                 if (rte_cryptodev_sym_session_clear(vcrypto->cid, session) < 0)
 385                         VC_LOG_ERR("Failed to clear session");
 386                 else {
 387                         if (rte_cryptodev_sym_session_free(session) < 0)
 388                                 VC_LOG_ERR("Failed to free session");
 389                 }
 390                 sess_param->session_id = -VIRTIO_CRYPTO_ERR;
 391                 return;
 392         }
 393
 394         VC_LOG_INFO("Session %"PRIu64" created for vdev %i.",
 395                         vcrypto->last_session_id, vcrypto->dev->vid);
 396
 397         sess_param->session_id = vcrypto->last_session_id;
 398         vcrypto->last_session_id++;
 399 }
 400
 401 static int
 402 vhost_crypto_close_sess(struct vhost_crypto *vcrypto, uint64_t session_id)
 403 {
 404         struct rte_cryptodev_sym_session *session;
 405         uint64_t sess_id = session_id;
 406         int ret;
 407
 408         ret = rte_hash_lookup_data(vcrypto->session_map, &sess_id,
 409                         (void **)&session);
 410
 411         if (unlikely(ret < 0)) {
 412                 VC_LOG_ERR("Failed to delete session %"PRIu64".", session_id);
 413                 return -VIRTIO_CRYPTO_INVSESS;
 414         }
 415
 416         if (rte_cryptodev_sym_session_clear(vcrypto->cid, session) < 0) {
 417                 VC_LOG_DBG("Failed to clear session");
 418                 return -VIRTIO_CRYPTO_ERR;
 419         }
 420
 421         if (rte_cryptodev_sym_session_free(session) < 0) {
 422                 VC_LOG_DBG("Failed to free session");
 423                 return -VIRTIO_CRYPTO_ERR;
 424         }
 425
 426         if (rte_hash_del_key(vcrypto->session_map, &sess_id) < 0) {
 427                 VC_LOG_DBG("Failed to delete session from hash table.");
 428                 return -VIRTIO_CRYPTO_ERR;
 429         }
 430
 431         VC_LOG_INFO("Session %"PRIu64" deleted for vdev %i.", sess_id,
 432                         vcrypto->dev->vid);
 433
 434         return 0;
 435 }
 436
 437 static enum vh_result
 438 vhost_crypto_msg_post_handler(int vid, void *msg)
 439 {
 440         struct virtio_net *dev = get_device(vid);
 441         struct vhost_crypto *vcrypto;
 442         VhostUserMsg *vmsg = msg;
 443         enum vh_result ret = VH_RESULT_OK;
 444
 445         if (dev == NULL) {
 446                 VC_LOG_ERR("Invalid vid %i", vid);
 447                 return VH_RESULT_ERR;
 448         }
 449
 450         vcrypto = dev->extern_data;
 451         if (vcrypto == NULL) {
 452                 VC_LOG_ERR("Cannot find required data, is it initialized?");
 453                 return VH_RESULT_ERR;
 454         }
 455
 456         if (vmsg->request.master == VHOST_USER_CRYPTO_CREATE_SESS) {
 457                 vhost_crypto_create_sess(vcrypto,
 458                                 &vmsg->payload.crypto_session);
 459                 vmsg->fd_num = 0;
 460                 ret = VH_RESULT_REPLY;
 461         } else if (vmsg->request.master == VHOST_USER_CRYPTO_CLOSE_SESS) {
 462                 if (vhost_crypto_close_sess(vcrypto, vmsg->payload.u64))
 463                         ret = VH_RESULT_ERR;
 464         }
 465
 466         return ret;
 467 }
 468
 469 static __rte_always_inline struct vring_desc *
 470 find_write_desc(struct vring_desc *head, struct vring_desc *desc)
 471 {
 472         if (desc->flags & VRING_DESC_F_WRITE)
 473                 return desc;
 474
 475         while (desc->flags & VRING_DESC_F_NEXT) {
 476                 desc = &head[desc->next];
 477                 if (desc->flags & VRING_DESC_F_WRITE)
 478                         return desc;
 479         }
 480
 481         return NULL;
 482 }
 483
 484 static struct virtio_crypto_inhdr *
 485 reach_inhdr(struct vhost_crypto_data_req *vc_req, struct vring_desc *desc)
 486 {
 487         uint64_t dlen;
 488         struct virtio_crypto_inhdr *inhdr;
 489
 490         while (desc->flags & VRING_DESC_F_NEXT)
 491                 desc = &vc_req->head[desc->next];
 492
 493         dlen = desc->len;
 494         inhdr = IOVA_TO_VVA(struct virtio_crypto_inhdr *, vc_req, desc->addr,
 495                         &dlen, VHOST_ACCESS_WO);
 496         if (unlikely(!inhdr || dlen != desc->len))
 497                 return NULL;
 498
 499         return inhdr;
 500 }
 501
 502 static __rte_always_inline int
 503 move_desc(struct vring_desc *head, struct vring_desc **cur_desc,
 504                 uint32_t size)
 505 {
 506         struct vring_desc *desc = *cur_desc;
 507         int left = size;
 508
 509         rte_prefetch0(&head[desc->next]);
 510         left -= desc->len;
 511
 512         while ((desc->flags & VRING_DESC_F_NEXT) && left > 0) {
 513                 desc = &head[desc->next];
 514                 rte_prefetch0(&head[desc->next]);
 515                 left -= desc->len;
 516         }
 517
 518         if (unlikely(left > 0))
 519                 return -1;
 520
 521         *cur_desc = &head[desc->next];
 522         return 0;
 523 }
 524
 525 static __rte_always_inline void *
 526 get_data_ptr(struct vhost_crypto_data_req *vc_req, struct vring_desc *cur_desc,
 527                 uint8_t perm)
 528 {
 529         void *data;
 530         uint64_t dlen = cur_desc->len;
 531
 532         data = IOVA_TO_VVA(void *, vc_req, cur_desc->addr, &dlen, perm);
 533         if (unlikely(!data || dlen != cur_desc->len)) {
 534                 VC_LOG_ERR("Failed to map object");
 535                 return NULL;
 536         }
 537
 538         return data;
 539 }
 540
 541 static int
 542 copy_data(void *dst_data, struct vhost_crypto_data_req *vc_req,
 543                 struct vring_desc **cur_desc, uint32_t size)
 544 {
 545         struct vring_desc *desc = *cur_desc;
 546         uint64_t remain, addr, dlen, len;
 547         uint32_t to_copy;
 548         uint8_t *data = dst_data;
 549         uint8_t *src;
 550         int left = size;
 551
 552         rte_prefetch0(&vc_req->head[desc->next]);
 553         to_copy = RTE_MIN(desc->len, (uint32_t)left);
 554         dlen = to_copy;
 555         src = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr, &dlen,
 556                         VHOST_ACCESS_RO);
 557         if (unlikely(!src || !dlen))
 558                 return -1;
 559
 560         rte_memcpy((uint8_t *)data, src, dlen);
 561         data += dlen;
 562
 563         if (unlikely(dlen < to_copy)) {
 564                 remain = to_copy - dlen;
 565                 addr = desc->addr + dlen;
 566
 567                 while (remain) {
 568                         len = remain;
 569                         src = IOVA_TO_VVA(uint8_t *, vc_req, addr, &len,
 570                                         VHOST_ACCESS_RO);
 571                         if (unlikely(!src || !len)) {
 572                                 VC_LOG_ERR("Failed to map descriptor");
 573                                 return -1;
 574                         }
 575
 576                         rte_memcpy(data, src, len);
 577                         addr += len;
 578                         remain -= len;
 579                         data += len;
 580                 }
 581         }
 582
 583         left -= to_copy;
 584
 585         while ((desc->flags & VRING_DESC_F_NEXT) && left > 0) {
 586                 desc = &vc_req->head[desc->next];
 587                 rte_prefetch0(&vc_req->head[desc->next]);
 588                 to_copy = RTE_MIN(desc->len, (uint32_t)left);
 589                 dlen = desc->len;
 590                 src = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr, &dlen,
 591                                 VHOST_ACCESS_RO);
 592                 if (unlikely(!src || !dlen)) {
 593                         VC_LOG_ERR("Failed to map descriptor");
 594                         return -1;
 595                 }
 596
 597                 rte_memcpy(data, src, dlen);
 598                 data += dlen;
 599
 600                 if (unlikely(dlen < to_copy)) {
 601                         remain = to_copy - dlen;
 602                         addr = desc->addr + dlen;
 603
 604                         while (remain) {
 605                                 len = remain;
 606                                 src = IOVA_TO_VVA(uint8_t *, vc_req, addr, &len,
 607                                                 VHOST_ACCESS_RO);
 608                                 if (unlikely(!src || !len)) {
 609                                         VC_LOG_ERR("Failed to map descriptor");
 610                                         return -1;
 611                                 }
 612
 613                                 rte_memcpy(data, src, len);
 614                                 addr += len;
 615                                 remain -= len;
 616                                 data += len;
 617                         }
 618                 }
 619
 620                 left -= to_copy;
 621         }
 622
 623         if (unlikely(left > 0)) {
 624                 VC_LOG_ERR("Incorrect virtio descriptor");
 625                 return -1;
 626         }
 627
 628         *cur_desc = &vc_req->head[desc->next];
 629
 630         return 0;
 631 }
 632
 633 static void
 634 write_back_data(struct vhost_crypto_data_req *vc_req)
 635 {
 636         struct vhost_crypto_writeback_data *wb_data = vc_req->wb, *wb_last;
 637
 638         while (wb_data) {
 639                 rte_prefetch0(wb_data->next);
 640                 rte_memcpy(wb_data->dst, wb_data->src, wb_data->len);
 641                 wb_last = wb_data;
 642                 wb_data = wb_data->next;
 643                 rte_mempool_put(vc_req->wb_pool, wb_last);
 644         }
 645 }
 646
 647 static void
 648 free_wb_data(struct vhost_crypto_writeback_data *wb_data,
 649                 struct rte_mempool *mp)
 650 {
 651         while (wb_data->next != NULL)
 652                 free_wb_data(wb_data->next, mp);
 653
 654         rte_mempool_put(mp, wb_data);
 655 }
 656
 657 /**
 658  * The function will allocate a vhost_crypto_writeback_data linked list
 659  * containing the source and destination data pointers for the write back
 660  * operation after dequeued from Cryptodev PMD queues.
 661  *
 662  * @param vc_req
 663  *   The vhost crypto data request pointer
 664  * @param cur_desc
 665  *   The pointer of the current in use descriptor pointer. The content of
 666  *   cur_desc is expected to be updated after the function execution.
 667  * @param end_wb_data
 668  *   The last write back data element to be returned. It is used only in cipher
 669  *   and hash chain operations.
 670  * @param src
 671  *   The source data pointer
 672  * @param offset
 673  *   The offset to both source and destination data. For source data the offset
 674  *   is the number of bytes between src and start point of cipher operation. For
 675  *   destination data the offset is the number of bytes from *cur_desc->addr
 676  *   to the point where the src will be written to.
 677  * @param write_back_len
 678  *   The size of the write back length.
 679  * @return
 680  *   The pointer to the start of the write back data linked list.
 681  */
 682 static struct vhost_crypto_writeback_data *
 683 prepare_write_back_data(struct vhost_crypto_data_req *vc_req,
 684                 struct vring_desc **cur_desc,
 685                 struct vhost_crypto_writeback_data **end_wb_data,
 686                 uint8_t *src,
 687                 uint32_t offset,
 688                 uint64_t write_back_len)
 689 {
 690         struct vhost_crypto_writeback_data *wb_data, *head;
 691         struct vring_desc *desc = *cur_desc;
 692         uint64_t dlen;
 693         uint8_t *dst;
 694         int ret;
 695
 696         ret = rte_mempool_get(vc_req->wb_pool, (void **)&head);
 697         if (unlikely(ret < 0)) {
 698                 VC_LOG_ERR("no memory");
 699                 goto error_exit;
 700         }
 701
 702         wb_data = head;
 703
 704         if (likely(desc->len > offset)) {
 705                 wb_data->src = src + offset;
 706                 dlen = desc->len;
 707                 dst = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr,
 708                         &dlen, VHOST_ACCESS_RW) + offset;
 709                 if (unlikely(!dst || dlen != desc->len)) {
 710                         VC_LOG_ERR("Failed to map descriptor");
 711                         goto error_exit;
 712                 }
 713
 714                 wb_data->dst = dst;
 715                 wb_data->len = desc->len - offset;
 716                 write_back_len -= wb_data->len;
 717                 src += offset + wb_data->len;
 718                 offset = 0;
 719
 720                 if (unlikely(write_back_len)) {
 721                         ret = rte_mempool_get(vc_req->wb_pool,
 722                                         (void **)&(wb_data->next));
 723                         if (unlikely(ret < 0)) {
 724                                 VC_LOG_ERR("no memory");
 725                                 goto error_exit;
 726                         }
 727
 728                         wb_data = wb_data->next;
 729                 } else
 730                         wb_data->next = NULL;
 731         } else
 732                 offset -= desc->len;
 733
 734         while (write_back_len) {
 735                 desc = &vc_req->head[desc->next];
 736                 if (unlikely(!(desc->flags & VRING_DESC_F_WRITE))) {
 737                         VC_LOG_ERR("incorrect descriptor");
 738                         goto error_exit;
 739                 }
 740
 741                 if (desc->len <= offset) {
 742                         offset -= desc->len;
 743                         continue;
 744                 }
 745
 746                 dlen = desc->len;
 747                 dst = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr, &dlen,
 748                                 VHOST_ACCESS_RW) + offset;
 749                 if (unlikely(dst == NULL || dlen != desc->len)) {
 750                         VC_LOG_ERR("Failed to map descriptor");
 751                         goto error_exit;
 752                 }
 753
 754                 wb_data->src = src;
 755                 wb_data->dst = dst;
 756                 wb_data->len = RTE_MIN(desc->len - offset, write_back_len);
 757                 write_back_len -= wb_data->len;
 758                 src += wb_data->len;
 759                 offset = 0;
 760
 761                 if (write_back_len) {
 762                         ret = rte_mempool_get(vc_req->wb_pool,
 763                                         (void **)&(wb_data->next));
 764                         if (unlikely(ret < 0)) {
 765                                 VC_LOG_ERR("no memory");
 766                                 goto error_exit;
 767                         }
 768
 769                         wb_data = wb_data->next;
 770                 } else
 771                         wb_data->next = NULL;
 772         }
 773
 774         *cur_desc = &vc_req->head[desc->next];
 775
 776         *end_wb_data = wb_data;
 777
 778         return head;
 779
 780 error_exit:
 781         if (head)
 782                 free_wb_data(head, vc_req->wb_pool);
 783
 784         return NULL;
 785 }
 786
 787 static uint8_t
 788 prepare_sym_cipher_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op,
 789                 struct vhost_crypto_data_req *vc_req,
 790                 struct virtio_crypto_cipher_data_req *cipher,
 791                 struct vring_desc *cur_desc)
 792 {
 793         struct vring_desc *desc = cur_desc;
 794         struct vhost_crypto_writeback_data *ewb = NULL;
 795         struct rte_mbuf *m_src = op->sym->m_src, *m_dst = op->sym->m_dst;
 796         uint8_t *iv_data = rte_crypto_op_ctod_offset(op, uint8_t *, IV_OFFSET);
 797         uint8_t ret = 0;
 798
 799         /* prepare */
 800         /* iv */
 801         if (unlikely(copy_data(iv_data, vc_req, &desc,
 802                         cipher->para.iv_len) < 0)) {
 803                 ret = VIRTIO_CRYPTO_BADMSG;
 804                 goto error_exit;
 805         }
 806
 807         m_src->data_len = cipher->para.src_data_len;
 808
 809         switch (vcrypto->option) {
 810         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
 811                 m_src->buf_iova = gpa_to_hpa(vcrypto->dev, desc->addr,
 812                                 cipher->para.src_data_len);
 813                 m_src->buf_addr = get_data_ptr(vc_req, desc, VHOST_ACCESS_RO);
 814                 if (unlikely(m_src->buf_iova == 0 ||
 815                                 m_src->buf_addr == NULL)) {
 816                         VC_LOG_ERR("zero_copy may fail due to cross page data");
 817                         ret = VIRTIO_CRYPTO_ERR;
 818                         goto error_exit;
 819                 }
 820
 821                 if (unlikely(move_desc(vc_req->head, &desc,
 822                                 cipher->para.src_data_len) < 0)) {
 823                         VC_LOG_ERR("Incorrect descriptor");
 824                         ret = VIRTIO_CRYPTO_ERR;
 825                         goto error_exit;
 826                 }
 827
 828                 break;
 829         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
 830                 vc_req->wb_pool = vcrypto->wb_pool;
 831
 832                 if (unlikely(cipher->para.src_data_len >
 833                                 RTE_MBUF_DEFAULT_BUF_SIZE)) {
 834                         VC_LOG_ERR("Not enough space to do data copy");
 835                         ret = VIRTIO_CRYPTO_ERR;
 836                         goto error_exit;
 837                 }
 838                 if (unlikely(copy_data(rte_pktmbuf_mtod(m_src, uint8_t *),
 839                                 vc_req, &desc, cipher->para.src_data_len)
 840                                 < 0)) {
 841                         ret = VIRTIO_CRYPTO_BADMSG;
 842                         goto error_exit;
 843                 }
 844                 break;
 845         default:
 846                 ret = VIRTIO_CRYPTO_BADMSG;
 847                 goto error_exit;
 848         }
 849
 850         /* dst */
 851         desc = find_write_desc(vc_req->head, desc);
 852         if (unlikely(!desc)) {
 853                 VC_LOG_ERR("Cannot find write location");
 854                 ret = VIRTIO_CRYPTO_BADMSG;
 855                 goto error_exit;
 856         }
 857
 858         switch (vcrypto->option) {
 859         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
 860                 m_dst->buf_iova = gpa_to_hpa(vcrypto->dev,
 861                                 desc->addr, cipher->para.dst_data_len);
 862                 m_dst->buf_addr = get_data_ptr(vc_req, desc, VHOST_ACCESS_RW);
 863                 if (unlikely(m_dst->buf_iova == 0 || m_dst->buf_addr == NULL)) {
 864                         VC_LOG_ERR("zero_copy may fail due to cross page data");
 865                         ret = VIRTIO_CRYPTO_ERR;
 866                         goto error_exit;
 867                 }
 868
 869                 if (unlikely(move_desc(vc_req->head, &desc,
 870                                 cipher->para.dst_data_len) < 0)) {
 871                         VC_LOG_ERR("Incorrect descriptor");
 872                         ret = VIRTIO_CRYPTO_ERR;
 873                         goto error_exit;
 874                 }
 875
 876                 m_dst->data_len = cipher->para.dst_data_len;
 877                 break;
 878         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
 879                 vc_req->wb = prepare_write_back_data(vc_req, &desc, &ewb,
 880                                 rte_pktmbuf_mtod(m_src, uint8_t *), 0,
 881                                 cipher->para.dst_data_len);
 882                 if (unlikely(vc_req->wb == NULL)) {
 883                         ret = VIRTIO_CRYPTO_ERR;
 884                         goto error_exit;
 885                 }
 886
 887                 break;
 888         default:
 889                 ret = VIRTIO_CRYPTO_BADMSG;
 890                 goto error_exit;
 891         }
 892
 893         /* src data */
 894         op->type = RTE_CRYPTO_OP_TYPE_SYMMETRIC;
 895         op->sess_type = RTE_CRYPTO_OP_WITH_SESSION;
 896
 897         op->sym->cipher.data.offset = 0;
 898         op->sym->cipher.data.length = cipher->para.src_data_len;
 899
 900         vc_req->inhdr = get_data_ptr(vc_req, desc, VHOST_ACCESS_WO);
 901         if (unlikely(vc_req->inhdr == NULL)) {
 902                 ret = VIRTIO_CRYPTO_BADMSG;
 903                 goto error_exit;
 904         }
 905
 906         vc_req->inhdr->status = VIRTIO_CRYPTO_OK;
 907         vc_req->len = cipher->para.dst_data_len + INHDR_LEN;
 908
 909         return 0;
 910
 911 error_exit:
 912         if (vc_req->wb)
 913                 free_wb_data(vc_req->wb, vc_req->wb_pool);
 914
 915         vc_req->len = INHDR_LEN;
 916         return ret;
 917 }
 918
 919 static uint8_t
 920 prepare_sym_chain_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op,
 921                 struct vhost_crypto_data_req *vc_req,
 922                 struct virtio_crypto_alg_chain_data_req *chain,
 923                 struct vring_desc *cur_desc)
 924 {
 925         struct vring_desc *desc = cur_desc, *digest_desc;
 926         struct vhost_crypto_writeback_data *ewb = NULL, *ewb2 = NULL;
 927         struct rte_mbuf *m_src = op->sym->m_src, *m_dst = op->sym->m_dst;
 928         uint8_t *iv_data = rte_crypto_op_ctod_offset(op, uint8_t *, IV_OFFSET);
 929         uint32_t digest_offset;
 930         void *digest_addr;
 931         uint8_t ret = 0;
 932
 933         /* prepare */
 934         /* iv */
 935         if (unlikely(copy_data(iv_data, vc_req, &desc,
 936                         chain->para.iv_len) < 0)) {
 937                 ret = VIRTIO_CRYPTO_BADMSG;
 938                 goto error_exit;
 939         }
 940
 941         m_src->data_len = chain->para.src_data_len;
 942
 943         switch (vcrypto->option) {
 944         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
 945                 m_dst->data_len = chain->para.dst_data_len;
 946
 947                 m_src->buf_iova = gpa_to_hpa(vcrypto->dev, desc->addr,
 948                                 chain->para.src_data_len);
 949                 m_src->buf_addr = get_data_ptr(vc_req, desc, VHOST_ACCESS_RO);
 950                 if (unlikely(m_src->buf_iova == 0 || m_src->buf_addr == NULL)) {
 951                         VC_LOG_ERR("zero_copy may fail due to cross page data");
 952                         ret = VIRTIO_CRYPTO_ERR;
 953                         goto error_exit;
 954                 }
 955
 956                 if (unlikely(move_desc(vc_req->head, &desc,
 957                                 chain->para.src_data_len) < 0)) {
 958                         VC_LOG_ERR("Incorrect descriptor");
 959                         ret = VIRTIO_CRYPTO_ERR;
 960                         goto error_exit;
 961                 }
 962                 break;
 963         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
 964                 vc_req->wb_pool = vcrypto->wb_pool;
 965
 966                 if (unlikely(chain->para.src_data_len >
 967                                 RTE_MBUF_DEFAULT_BUF_SIZE)) {
 968                         VC_LOG_ERR("Not enough space to do data copy");
 969                         ret = VIRTIO_CRYPTO_ERR;
 970                         goto error_exit;
 971                 }
 972                 if (unlikely(copy_data(rte_pktmbuf_mtod(m_src, uint8_t *),
 973                                 vc_req, &desc, chain->para.src_data_len)) < 0) {
 974                         ret = VIRTIO_CRYPTO_BADMSG;
 975                         goto error_exit;
 976                 }
 977
 978                 break;
 979         default:
 980                 ret = VIRTIO_CRYPTO_BADMSG;
 981                 goto error_exit;
 982         }
 983
 984         /* dst */
 985         desc = find_write_desc(vc_req->head, desc);
 986         if (unlikely(!desc)) {
 987                 VC_LOG_ERR("Cannot find write location");
 988                 ret = VIRTIO_CRYPTO_BADMSG;
 989                 goto error_exit;
 990         }
 991
 992         switch (vcrypto->option) {
 993         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
 994                 m_dst->buf_iova = gpa_to_hpa(vcrypto->dev,
 995                                 desc->addr, chain->para.dst_data_len);
 996                 m_dst->buf_addr = get_data_ptr(vc_req, desc, VHOST_ACCESS_RW);
 997                 if (unlikely(m_dst->buf_iova == 0 || m_dst->buf_addr == NULL)) {
 998                         VC_LOG_ERR("zero_copy may fail due to cross page data");
 999                         ret = VIRTIO_CRYPTO_ERR;
1000                         goto error_exit;
1001                 }
1002
1003                 if (unlikely(move_desc(vc_req->head, &desc,
1004                                 chain->para.dst_data_len) < 0)) {
1005                         VC_LOG_ERR("Incorrect descriptor");
1006                         ret = VIRTIO_CRYPTO_ERR;
1007                         goto error_exit;
1008                 }
1009
1010                 op->sym->auth.digest.phys_addr = gpa_to_hpa(vcrypto->dev,
1011                                 desc->addr, chain->para.hash_result_len);
1012                 op->sym->auth.digest.data = get_data_ptr(vc_req, desc,
1013                                 VHOST_ACCESS_RW);
1014                 if (unlikely(op->sym->auth.digest.phys_addr == 0)) {
1015                         VC_LOG_ERR("zero_copy may fail due to cross page data");
1016                         ret = VIRTIO_CRYPTO_ERR;
1017                         goto error_exit;
1018                 }
1019
1020                 if (unlikely(move_desc(vc_req->head, &desc,
1021                                 chain->para.hash_result_len) < 0)) {
1022                         VC_LOG_ERR("Incorrect descriptor");
1023                         ret = VIRTIO_CRYPTO_ERR;
1024                         goto error_exit;
1025                 }
1026
1027                 break;
1028         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
1029                 vc_req->wb = prepare_write_back_data(vc_req, &desc, &ewb,
1030                                 rte_pktmbuf_mtod(m_src, uint8_t *),
1031                                 chain->para.cipher_start_src_offset,
1032                                 chain->para.dst_data_len -
1033                                 chain->para.cipher_start_src_offset);
1034                 if (unlikely(vc_req->wb == NULL)) {
1035                         ret = VIRTIO_CRYPTO_ERR;
1036                         goto error_exit;
1037                 }
1038
1039                 digest_offset = m_src->data_len;
1040                 digest_addr = rte_pktmbuf_mtod_offset(m_src, void *,
1041                                 digest_offset);
1042                 digest_desc = desc;
1043
1044                 /** create a wb_data for digest */
1045                 ewb->next = prepare_write_back_data(vc_req, &desc, &ewb2,
1046                                 digest_addr, 0, chain->para.hash_result_len);
1047                 if (unlikely(ewb->next == NULL)) {
1048                         ret = VIRTIO_CRYPTO_ERR;
1049                         goto error_exit;
1050                 }
1051
1052                 if (unlikely(copy_data(digest_addr, vc_req, &digest_desc,
1053                                 chain->para.hash_result_len)) < 0) {
1054                         ret = VIRTIO_CRYPTO_BADMSG;
1055                         goto error_exit;
1056                 }
1057
1058                 op->sym->auth.digest.data = digest_addr;
1059                 op->sym->auth.digest.phys_addr = rte_pktmbuf_iova_offset(m_src,
1060                                 digest_offset);
1061                 break;
1062         default:
1063                 ret = VIRTIO_CRYPTO_BADMSG;
1064                 goto error_exit;
1065         }
1066
1067         /* record inhdr */
1068         vc_req->inhdr = get_data_ptr(vc_req, desc, VHOST_ACCESS_WO);
1069         if (unlikely(vc_req->inhdr == NULL)) {
1070                 ret = VIRTIO_CRYPTO_BADMSG;
1071                 goto error_exit;
1072         }
1073
1074         vc_req->inhdr->status = VIRTIO_CRYPTO_OK;
1075
1076         op->type = RTE_CRYPTO_OP_TYPE_SYMMETRIC;
1077         op->sess_type = RTE_CRYPTO_OP_WITH_SESSION;
1078
1079         op->sym->cipher.data.offset = chain->para.cipher_start_src_offset;
1080         op->sym->cipher.data.length = chain->para.src_data_len -
1081                         chain->para.cipher_start_src_offset;
1082
1083         op->sym->auth.data.offset = chain->para.hash_start_src_offset;
1084         op->sym->auth.data.length = chain->para.len_to_hash;
1085
1086         vc_req->len = chain->para.dst_data_len + chain->para.hash_result_len +
1087                         INHDR_LEN;
1088         return 0;
1089
1090 error_exit:
1091         if (vc_req->wb)
1092                 free_wb_data(vc_req->wb, vc_req->wb_pool);
1093         vc_req->len = INHDR_LEN;
1094         return ret;
1095 }
1096
1097 /**
1098  * Process on descriptor
1099  */
1100 static __rte_always_inline int
1101 vhost_crypto_process_one_req(struct vhost_crypto *vcrypto,
1102                 struct vhost_virtqueue *vq, struct rte_crypto_op *op,
1103                 struct vring_desc *head, uint16_t desc_idx)
1104 {
1105         struct vhost_crypto_data_req *vc_req = rte_mbuf_to_priv(op->sym->m_src);
1106         struct rte_cryptodev_sym_session *session;
1107         struct virtio_crypto_op_data_req *req, tmp_req;
1108         struct virtio_crypto_inhdr *inhdr;
1109         struct vring_desc *desc = NULL;
1110         uint64_t session_id;
1111         uint64_t dlen;
1112         int err = 0;
1113
1114         vc_req->desc_idx = desc_idx;
1115         vc_req->dev = vcrypto->dev;
1116         vc_req->vq = vq;
1117
1118         if (likely(head->flags & VRING_DESC_F_INDIRECT)) {
1119                 dlen = head->len;
1120                 desc = IOVA_TO_VVA(struct vring_desc *, vc_req, head->addr,
1121                                 &dlen, VHOST_ACCESS_RO);
1122                 if (unlikely(!desc || dlen != head->len))
1123                         return -1;
1124                 desc_idx = 0;
1125                 head = desc;
1126         } else {
1127                 desc = head;
1128         }
1129
1130         vc_req->head = head;
1131         vc_req->zero_copy = vcrypto->option;
1132
1133         req = get_data_ptr(vc_req, desc, VHOST_ACCESS_RO);
1134         if (unlikely(req == NULL)) {
1135                 switch (vcrypto->option) {
1136                 case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
1137                         err = VIRTIO_CRYPTO_BADMSG;
1138                         VC_LOG_ERR("Invalid descriptor");
1139                         goto error_exit;
1140                 case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
1141                         req = &tmp_req;
1142                         if (unlikely(copy_data(req, vc_req, &desc, sizeof(*req))
1143                                         < 0)) {
1144                                 err = VIRTIO_CRYPTO_BADMSG;
1145                                 VC_LOG_ERR("Invalid descriptor");
1146                                 goto error_exit;
1147                         }
1148                         break;
1149                 default:
1150                         err = VIRTIO_CRYPTO_ERR;
1151                         VC_LOG_ERR("Invalid option");
1152                         goto error_exit;
1153                 }
1154         } else {
1155                 if (unlikely(move_desc(vc_req->head, &desc,
1156                                 sizeof(*req)) < 0)) {
1157                         VC_LOG_ERR("Incorrect descriptor");
1158                         goto error_exit;
1159                 }
1160         }
1161
1162         switch (req->header.opcode) {
1163         case VIRTIO_CRYPTO_CIPHER_ENCRYPT:
1164         case VIRTIO_CRYPTO_CIPHER_DECRYPT:
1165                 session_id = req->header.session_id;
1166
1167                 /* one branch to avoid unnecessary table lookup */
1168                 if (vcrypto->cache_session_id != session_id) {
1169                         err = rte_hash_lookup_data(vcrypto->session_map,
1170                                         &session_id, (void **)&session);
1171                         if (unlikely(err < 0)) {
1172                                 err = VIRTIO_CRYPTO_ERR;
1173                                 VC_LOG_ERR("Failed to find session %"PRIu64,
1174                                                 session_id);
1175                                 goto error_exit;
1176                         }
1177
1178                         vcrypto->cache_session = session;
1179                         vcrypto->cache_session_id = session_id;
1180                 }
1181
1182                 session = vcrypto->cache_session;
1183
1184                 err = rte_crypto_op_attach_sym_session(op, session);
1185                 if (unlikely(err < 0)) {
1186                         err = VIRTIO_CRYPTO_ERR;
1187                         VC_LOG_ERR("Failed to attach session to op");
1188                         goto error_exit;
1189                 }
1190
1191                 switch (req->u.sym_req.op_type) {
1192                 case VIRTIO_CRYPTO_SYM_OP_NONE:
1193                         err = VIRTIO_CRYPTO_NOTSUPP;
1194                         break;
1195                 case VIRTIO_CRYPTO_SYM_OP_CIPHER:
1196                         err = prepare_sym_cipher_op(vcrypto, op, vc_req,
1197                                         &req->u.sym_req.u.cipher, desc);
1198                         break;
1199                 case VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING:
1200                         err = prepare_sym_chain_op(vcrypto, op, vc_req,
1201                                         &req->u.sym_req.u.chain, desc);
1202                         break;
1203                 }
1204                 if (unlikely(err != 0)) {
1205                         VC_LOG_ERR("Failed to process sym request");
1206                         goto error_exit;
1207                 }
1208                 break;
1209         default:
1210                 VC_LOG_ERR("Unsupported symmetric crypto request type %u",
1211                                 req->header.opcode);
1212                 goto error_exit;
1213         }
1214
1215         return 0;
1216
1217 error_exit:
1218
1219         inhdr = reach_inhdr(vc_req, desc);
1220         if (likely(inhdr != NULL))
1221                 inhdr->status = (uint8_t)err;
1222
1223         return -1;
1224 }
1225
1226 static __rte_always_inline struct vhost_virtqueue *
1227 vhost_crypto_finalize_one_request(struct rte_crypto_op *op,
1228                 struct vhost_virtqueue *old_vq)
1229 {
1230         struct rte_mbuf *m_src = op->sym->m_src;
1231         struct rte_mbuf *m_dst = op->sym->m_dst;
1232         struct vhost_crypto_data_req *vc_req = rte_mbuf_to_priv(m_src);
1233         uint16_t desc_idx;
1234
1235         if (unlikely(!vc_req)) {
1236                 VC_LOG_ERR("Failed to retrieve vc_req");
1237                 return NULL;
1238         }
1239
1240         if (old_vq && (vc_req->vq != old_vq))
1241                 return vc_req->vq;
1242
1243         desc_idx = vc_req->desc_idx;
1244
1245         if (unlikely(op->status != RTE_CRYPTO_OP_STATUS_SUCCESS))
1246                 vc_req->inhdr->status = VIRTIO_CRYPTO_ERR;
1247         else {
1248                 if (vc_req->zero_copy == 0)
1249                         write_back_data(vc_req);
1250         }
1251
1252         vc_req->vq->used->ring[desc_idx].id = desc_idx;
1253         vc_req->vq->used->ring[desc_idx].len = vc_req->len;
1254
1255         rte_mempool_put(m_src->pool, (void *)m_src);
1256
1257         if (m_dst)
1258                 rte_mempool_put(m_dst->pool, (void *)m_dst);
1259
1260         return vc_req->vq;
1261 }
1262
1263 static __rte_always_inline uint16_t
1264 vhost_crypto_complete_one_vm_requests(struct rte_crypto_op **ops,
1265                 uint16_t nb_ops, int *callfd)
1266 {
1267         uint16_t processed = 1;
1268         struct vhost_virtqueue *vq, *tmp_vq;
1269
1270         if (unlikely(nb_ops == 0))
1271                 return 0;
1272
1273         vq = vhost_crypto_finalize_one_request(ops[0], NULL);
1274         if (unlikely(vq == NULL))
1275                 return 0;
1276         tmp_vq = vq;
1277
1278         while ((processed < nb_ops)) {
1279                 tmp_vq = vhost_crypto_finalize_one_request(ops[processed],
1280                                 tmp_vq);
1281
1282                 if (unlikely(vq != tmp_vq))
1283                         break;
1284
1285                 processed++;
1286         }
1287
1288         *callfd = vq->callfd;
1289
1290         *(volatile uint16_t *)&vq->used->idx += processed;
1291
1292         return processed;
1293 }
1294
1295 int __rte_experimental
1296 rte_vhost_crypto_create(int vid, uint8_t cryptodev_id,
1297                 struct rte_mempool *sess_pool,
1298                 struct rte_mempool *sess_priv_pool,
1299                 int socket_id)
1300 {
1301         struct virtio_net *dev = get_device(vid);
1302         struct rte_hash_parameters params = {0};
1303         struct vhost_crypto *vcrypto;
1304         char name[128];
1305         int ret;
1306
1307         if (!dev) {
1308                 VC_LOG_ERR("Invalid vid %i", vid);
1309                 return -EINVAL;
1310         }
1311
1312         ret = rte_vhost_driver_set_features(dev->ifname,
1313                         VIRTIO_CRYPTO_FEATURES);
1314         if (ret < 0) {
1315                 VC_LOG_ERR("Error setting features");
1316                 return -1;
1317         }
1318
1319         vcrypto = rte_zmalloc_socket(NULL, sizeof(*vcrypto),
1320                         RTE_CACHE_LINE_SIZE, socket_id);
1321         if (!vcrypto) {
1322                 VC_LOG_ERR("Insufficient memory");
1323                 return -ENOMEM;
1324         }
1325
1326         vcrypto->sess_pool = sess_pool;
1327         vcrypto->sess_priv_pool = sess_priv_pool;
1328         vcrypto->cid = cryptodev_id;
1329         vcrypto->cache_session_id = UINT64_MAX;
1330         vcrypto->last_session_id = 1;
1331         vcrypto->dev = dev;
1332         vcrypto->option = RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE;
1333
1334         snprintf(name, 127, "HASH_VHOST_CRYPT_%u", (uint32_t)vid);
1335         params.name = name;
1336         params.entries = VHOST_CRYPTO_SESSION_MAP_ENTRIES;
1337         params.hash_func = rte_jhash;
1338         params.key_len = sizeof(uint64_t);
1339         params.socket_id = socket_id;
1340         vcrypto->session_map = rte_hash_create(&params);
1341         if (!vcrypto->session_map) {
1342                 VC_LOG_ERR("Failed to creath session map");
1343                 ret = -ENOMEM;
1344                 goto error_exit;
1345         }
1346
1347         snprintf(name, 127, "MBUF_POOL_VM_%u", (uint32_t)vid);
1348         vcrypto->mbuf_pool = rte_pktmbuf_pool_create(name,
1349                         VHOST_CRYPTO_MBUF_POOL_SIZE, 512,
1350                         sizeof(struct vhost_crypto_data_req),
1351                         RTE_MBUF_DEFAULT_DATAROOM * 2 + RTE_PKTMBUF_HEADROOM,
1352                         rte_socket_id());
1353         if (!vcrypto->mbuf_pool) {
1354                 VC_LOG_ERR("Failed to creath mbuf pool");
1355                 ret = -ENOMEM;
1356                 goto error_exit;
1357         }
1358
1359         snprintf(name, 127, "WB_POOL_VM_%u", (uint32_t)vid);
1360         vcrypto->wb_pool = rte_mempool_create(name,
1361                         VHOST_CRYPTO_MBUF_POOL_SIZE,
1362                         sizeof(struct vhost_crypto_writeback_data),
1363                         128, 0, NULL, NULL, NULL, NULL,
1364                         rte_socket_id(), 0);
1365         if (!vcrypto->wb_pool) {
1366                 VC_LOG_ERR("Failed to creath mempool");
1367                 ret = -ENOMEM;
1368                 goto error_exit;
1369         }
1370
1371         dev->extern_data = vcrypto;
1372         dev->extern_ops.pre_msg_handle = NULL;
1373         dev->extern_ops.post_msg_handle = vhost_crypto_msg_post_handler;
1374
1375         return 0;
1376
1377 error_exit:
1378         if (vcrypto->session_map)
1379                 rte_hash_free(vcrypto->session_map);
1380         if (vcrypto->mbuf_pool)
1381                 rte_mempool_free(vcrypto->mbuf_pool);
1382
1383         rte_free(vcrypto);
1384
1385         return ret;
1386 }
1387
1388 int __rte_experimental
1389 rte_vhost_crypto_free(int vid)
1390 {
1391         struct virtio_net *dev = get_device(vid);
1392         struct vhost_crypto *vcrypto;
1393
1394         if (unlikely(dev == NULL)) {
1395                 VC_LOG_ERR("Invalid vid %i", vid);
1396                 return -EINVAL;
1397         }
1398
1399         vcrypto = dev->extern_data;
1400         if (unlikely(vcrypto == NULL)) {
1401                 VC_LOG_ERR("Cannot find required data, is it initialized?");
1402                 return -ENOENT;
1403         }
1404
1405         rte_hash_free(vcrypto->session_map);
1406         rte_mempool_free(vcrypto->mbuf_pool);
1407         rte_mempool_free(vcrypto->wb_pool);
1408         rte_free(vcrypto);
1409
1410         dev->extern_data = NULL;
1411         dev->extern_ops.pre_msg_handle = NULL;
1412         dev->extern_ops.post_msg_handle = NULL;
1413
1414         return 0;
1415 }
1416
1417 int __rte_experimental
1418 rte_vhost_crypto_set_zero_copy(int vid, enum rte_vhost_crypto_zero_copy option)
1419 {
1420         struct virtio_net *dev = get_device(vid);
1421         struct vhost_crypto *vcrypto;
1422
1423         if (unlikely(dev == NULL)) {
1424                 VC_LOG_ERR("Invalid vid %i", vid);
1425                 return -EINVAL;
1426         }
1427
1428         if (unlikely((uint32_t)option >=
1429                                 RTE_VHOST_CRYPTO_MAX_ZERO_COPY_OPTIONS)) {
1430                 VC_LOG_ERR("Invalid option %i", option);
1431                 return -EINVAL;
1432         }
1433
1434         vcrypto = (struct vhost_crypto *)dev->extern_data;
1435         if (unlikely(vcrypto == NULL)) {
1436                 VC_LOG_ERR("Cannot find required data, is it initialized?");
1437                 return -ENOENT;
1438         }
1439
1440         if (vcrypto->option == (uint8_t)option)
1441                 return 0;
1442
1443         if (!(rte_mempool_full(vcrypto->mbuf_pool)) ||
1444                         !(rte_mempool_full(vcrypto->wb_pool))) {
1445                 VC_LOG_ERR("Cannot update zero copy as mempool is not full");
1446                 return -EINVAL;
1447         }
1448
1449         if (option == RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE) {
1450                 char name[128];
1451
1452                 snprintf(name, 127, "WB_POOL_VM_%u", (uint32_t)vid);
1453                 vcrypto->wb_pool = rte_mempool_create(name,
1454                                 VHOST_CRYPTO_MBUF_POOL_SIZE,
1455                                 sizeof(struct vhost_crypto_writeback_data),
1456                                 128, 0, NULL, NULL, NULL, NULL,
1457                                 rte_socket_id(), 0);
1458                 if (!vcrypto->wb_pool) {
1459                         VC_LOG_ERR("Failed to creath mbuf pool");
1460                         return -ENOMEM;
1461                 }
1462         } else {
1463                 rte_mempool_free(vcrypto->wb_pool);
1464                 vcrypto->wb_pool = NULL;
1465         }
1466
1467         vcrypto->option = (uint8_t)option;
1468
1469         return 0;
1470 }
1471
1472 uint16_t __rte_experimental
1473 rte_vhost_crypto_fetch_requests(int vid, uint32_t qid,
1474                 struct rte_crypto_op **ops, uint16_t nb_ops)
1475 {
1476         struct rte_mbuf *mbufs[VHOST_CRYPTO_MAX_BURST_SIZE * 2];
1477         struct virtio_net *dev = get_device(vid);
1478         struct vhost_crypto *vcrypto;
1479         struct vhost_virtqueue *vq;
1480         uint16_t avail_idx;
1481         uint16_t start_idx;
1482         uint16_t count;
1483         uint16_t i = 0;
1484
1485         if (unlikely(dev == NULL)) {
1486                 VC_LOG_ERR("Invalid vid %i", vid);
1487                 return -EINVAL;
1488         }
1489
1490         if (unlikely(qid >= VHOST_MAX_QUEUE_PAIRS)) {
1491                 VC_LOG_ERR("Invalid qid %u", qid);
1492                 return -EINVAL;
1493         }
1494
1495         vcrypto = (struct vhost_crypto *)dev->extern_data;
1496         if (unlikely(vcrypto == NULL)) {
1497                 VC_LOG_ERR("Cannot find required data, is it initialized?");
1498                 return -ENOENT;
1499         }
1500
1501         vq = dev->virtqueue[qid];
1502
1503         avail_idx = *((volatile uint16_t *)&vq->avail->idx);
1504         start_idx = vq->last_used_idx;
1505         count = avail_idx - start_idx;
1506         count = RTE_MIN(count, VHOST_CRYPTO_MAX_BURST_SIZE);
1507         count = RTE_MIN(count, nb_ops);
1508
1509         if (unlikely(count == 0))
1510                 return 0;
1511
1512         /* for zero copy, we need 2 empty mbufs for src and dst, otherwise
1513          * we need only 1 mbuf as src and dst
1514          */
1515         switch (vcrypto->option) {
1516         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
1517                 if (unlikely(rte_mempool_get_bulk(vcrypto->mbuf_pool,
1518                                 (void **)mbufs, count * 2) < 0)) {
1519                         VC_LOG_ERR("Insufficient memory");
1520                         return -ENOMEM;
1521                 }
1522
1523                 for (i = 0; i < count; i++) {
1524                         uint16_t used_idx = (start_idx + i) & (vq->size - 1);
1525                         uint16_t desc_idx = vq->avail->ring[used_idx];
1526                         struct vring_desc *head = &vq->desc[desc_idx];
1527                         struct rte_crypto_op *op = ops[i];
1528
1529                         op->sym->m_src = mbufs[i * 2];
1530                         op->sym->m_dst = mbufs[i * 2 + 1];
1531                         op->sym->m_src->data_off = 0;
1532                         op->sym->m_dst->data_off = 0;
1533
1534                         if (unlikely(vhost_crypto_process_one_req(vcrypto, vq,
1535                                         op, head, desc_idx)) < 0)
1536                                 break;
1537                 }
1538
1539                 if (unlikely(i < count))
1540                         rte_mempool_put_bulk(vcrypto->mbuf_pool,
1541                                         (void **)&mbufs[i * 2],
1542                                         (count - i) * 2);
1543
1544                 break;
1545
1546         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
1547                 if (unlikely(rte_mempool_get_bulk(vcrypto->mbuf_pool,
1548                                 (void **)mbufs, count) < 0)) {
1549                         VC_LOG_ERR("Insufficient memory");
1550                         return -ENOMEM;
1551                 }
1552
1553                 for (i = 0; i < count; i++) {
1554                         uint16_t used_idx = (start_idx + i) & (vq->size - 1);
1555                         uint16_t desc_idx = vq->avail->ring[used_idx];
1556                         struct vring_desc *head = &vq->desc[desc_idx];
1557                         struct rte_crypto_op *op = ops[i];
1558
1559                         op->sym->m_src = mbufs[i];
1560                         op->sym->m_dst = NULL;
1561                         op->sym->m_src->data_off = 0;
1562
1563                         if (unlikely(vhost_crypto_process_one_req(vcrypto, vq,
1564                                         op, head, desc_idx)) < 0)
1565                                 break;
1566                 }
1567
1568                 if (unlikely(i < count))
1569                         rte_mempool_put_bulk(vcrypto->mbuf_pool,
1570                                         (void **)&mbufs[i],
1571                                         count - i);
1572
1573                 break;
1574
1575         }
1576
1577         vq->last_used_idx += i;
1578
1579         return i;
1580 }
1581
1582 uint16_t __rte_experimental
1583 rte_vhost_crypto_finalize_requests(struct rte_crypto_op **ops,
1584                 uint16_t nb_ops, int *callfds, uint16_t *nb_callfds)
1585 {
1586         struct rte_crypto_op **tmp_ops = ops;
1587         uint16_t count = 0, left = nb_ops;
1588         int callfd;
1589         uint16_t idx = 0;
1590
1591         while (left) {
1592                 count = vhost_crypto_complete_one_vm_requests(tmp_ops, left,
1593                                 &callfd);
1594                 if (unlikely(count == 0))
1595                         break;
1596
1597                 tmp_ops = &tmp_ops[count];
1598                 left -= count;
1599
1600                 callfds[idx++] = callfd;
1601
1602                 if (unlikely(idx >= VIRTIO_CRYPTO_MAX_NUM_BURST_VQS)) {
1603                         VC_LOG_ERR("Too many vqs");
1604                         break;
1605                 }
1606         }
1607
1608         *nb_callfds = idx;
1609
1610         return nb_ops - left;
1611 }