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                 uint32_t *nb_descs)
 472 {
 473         if (desc->flags & VRING_DESC_F_WRITE)
 474                 return desc;
 475
 476         while (desc->flags & VRING_DESC_F_NEXT) {
 477                 if (unlikely(*nb_descs == 0))
 478                         return NULL;
 479                 (*nb_descs)--;
 480
 481                 desc = &head[desc->next];
 482                 if (desc->flags & VRING_DESC_F_WRITE)
 483                         return desc;
 484         }
 485
 486         return NULL;
 487 }
 488
 489 static struct virtio_crypto_inhdr *
 490 reach_inhdr(struct vhost_crypto_data_req *vc_req, struct vring_desc *desc,
 491                 uint32_t *nb_descs)
 492 {
 493         uint64_t dlen;
 494         struct virtio_crypto_inhdr *inhdr;
 495
 496         while (desc->flags & VRING_DESC_F_NEXT) {
 497                 if (unlikely(*nb_descs == 0))
 498                         return NULL;
 499                 (*nb_descs)--;
 500                 desc = &vc_req->head[desc->next];
 501         }
 502
 503         dlen = desc->len;
 504         inhdr = IOVA_TO_VVA(struct virtio_crypto_inhdr *, vc_req, desc->addr,
 505                         &dlen, VHOST_ACCESS_WO);
 506         if (unlikely(!inhdr || dlen != desc->len))
 507                 return NULL;
 508
 509         return inhdr;
 510 }
 511
 512 static __rte_always_inline int
 513 move_desc(struct vring_desc *head, struct vring_desc **cur_desc,
 514                 uint32_t size, uint32_t *nb_descs)
 515 {
 516         struct vring_desc *desc = *cur_desc;
 517         int left = size - desc->len;
 518
 519         while ((desc->flags & VRING_DESC_F_NEXT) && left > 0) {
 520                 (*nb_descs)--;
 521                 if (unlikely(*nb_descs == 0))
 522                         return -1;
 523
 524                 desc = &head[desc->next];
 525                 rte_prefetch0(&head[desc->next]);
 526                 left -= desc->len;
 527         }
 528
 529         if (unlikely(left > 0))
 530                 return -1;
 531
 532         if (unlikely(*nb_descs == 0))
 533                 *cur_desc = NULL;
 534         else
 535                 *cur_desc = &head[desc->next];
 536         return 0;
 537 }
 538
 539 static __rte_always_inline void *
 540 get_data_ptr(struct vhost_crypto_data_req *vc_req, struct vring_desc *cur_desc,
 541                 uint8_t perm)
 542 {
 543         void *data;
 544         uint64_t dlen = cur_desc->len;
 545
 546         data = IOVA_TO_VVA(void *, vc_req, cur_desc->addr, &dlen, perm);
 547         if (unlikely(!data || dlen != cur_desc->len)) {
 548                 VC_LOG_ERR("Failed to map object");
 549                 return NULL;
 550         }
 551
 552         return data;
 553 }
 554
 555 static int
 556 copy_data(void *dst_data, struct vhost_crypto_data_req *vc_req,
 557                 struct vring_desc **cur_desc, uint32_t size, uint32_t *nb_descs)
 558 {
 559         struct vring_desc *desc = *cur_desc;
 560         uint64_t remain, addr, dlen, len;
 561         uint32_t to_copy;
 562         uint8_t *data = dst_data;
 563         uint8_t *src;
 564         int left = size;
 565
 566         to_copy = RTE_MIN(desc->len, (uint32_t)left);
 567         dlen = to_copy;
 568         src = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr, &dlen,
 569                         VHOST_ACCESS_RO);
 570         if (unlikely(!src || !dlen))
 571                 return -1;
 572
 573         rte_memcpy((uint8_t *)data, src, dlen);
 574         data += dlen;
 575
 576         if (unlikely(dlen < to_copy)) {
 577                 remain = to_copy - dlen;
 578                 addr = desc->addr + dlen;
 579
 580                 while (remain) {
 581                         len = remain;
 582                         src = IOVA_TO_VVA(uint8_t *, vc_req, addr, &len,
 583                                         VHOST_ACCESS_RO);
 584                         if (unlikely(!src || !len)) {
 585                                 VC_LOG_ERR("Failed to map descriptor");
 586                                 return -1;
 587                         }
 588
 589                         rte_memcpy(data, src, len);
 590                         addr += len;
 591                         remain -= len;
 592                         data += len;
 593                 }
 594         }
 595
 596         left -= to_copy;
 597
 598         while ((desc->flags & VRING_DESC_F_NEXT) && left > 0) {
 599                 if (unlikely(*nb_descs == 0)) {
 600                         VC_LOG_ERR("Invalid descriptors");
 601                         return -1;
 602                 }
 603                 (*nb_descs)--;
 604
 605                 desc = &vc_req->head[desc->next];
 606                 rte_prefetch0(&vc_req->head[desc->next]);
 607                 to_copy = RTE_MIN(desc->len, (uint32_t)left);
 608                 dlen = desc->len;
 609                 src = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr, &dlen,
 610                                 VHOST_ACCESS_RO);
 611                 if (unlikely(!src || !dlen)) {
 612                         VC_LOG_ERR("Failed to map descriptor");
 613                         return -1;
 614                 }
 615
 616                 rte_memcpy(data, src, dlen);
 617                 data += dlen;
 618
 619                 if (unlikely(dlen < to_copy)) {
 620                         remain = to_copy - dlen;
 621                         addr = desc->addr + dlen;
 622
 623                         while (remain) {
 624                                 len = remain;
 625                                 src = IOVA_TO_VVA(uint8_t *, vc_req, addr, &len,
 626                                                 VHOST_ACCESS_RO);
 627                                 if (unlikely(!src || !len)) {
 628                                         VC_LOG_ERR("Failed to map descriptor");
 629                                         return -1;
 630                                 }
 631
 632                                 rte_memcpy(data, src, len);
 633                                 addr += len;
 634                                 remain -= len;
 635                                 data += len;
 636                         }
 637                 }
 638
 639                 left -= to_copy;
 640         }
 641
 642         if (unlikely(left > 0)) {
 643                 VC_LOG_ERR("Incorrect virtio descriptor");
 644                 return -1;
 645         }
 646
 647         if (unlikely(*nb_descs == 0))
 648                 *cur_desc = NULL;
 649         else
 650                 *cur_desc = &vc_req->head[desc->next];
 651
 652         return 0;
 653 }
 654
 655 static void
 656 write_back_data(struct vhost_crypto_data_req *vc_req)
 657 {
 658         struct vhost_crypto_writeback_data *wb_data = vc_req->wb, *wb_last;
 659
 660         while (wb_data) {
 661                 rte_prefetch0(wb_data->next);
 662                 rte_memcpy(wb_data->dst, wb_data->src, wb_data->len);
 663                 wb_last = wb_data;
 664                 wb_data = wb_data->next;
 665                 rte_mempool_put(vc_req->wb_pool, wb_last);
 666         }
 667 }
 668
 669 static void
 670 free_wb_data(struct vhost_crypto_writeback_data *wb_data,
 671                 struct rte_mempool *mp)
 672 {
 673         while (wb_data->next != NULL)
 674                 free_wb_data(wb_data->next, mp);
 675
 676         rte_mempool_put(mp, wb_data);
 677 }
 678
 679 /**
 680  * The function will allocate a vhost_crypto_writeback_data linked list
 681  * containing the source and destination data pointers for the write back
 682  * operation after dequeued from Cryptodev PMD queues.
 683  *
 684  * @param vc_req
 685  *   The vhost crypto data request pointer
 686  * @param cur_desc
 687  *   The pointer of the current in use descriptor pointer. The content of
 688  *   cur_desc is expected to be updated after the function execution.
 689  * @param end_wb_data
 690  *   The last write back data element to be returned. It is used only in cipher
 691  *   and hash chain operations.
 692  * @param src
 693  *   The source data pointer
 694  * @param offset
 695  *   The offset to both source and destination data. For source data the offset
 696  *   is the number of bytes between src and start point of cipher operation. For
 697  *   destination data the offset is the number of bytes from *cur_desc->addr
 698  *   to the point where the src will be written to.
 699  * @param write_back_len
 700  *   The size of the write back length.
 701  * @return
 702  *   The pointer to the start of the write back data linked list.
 703  */
 704 static struct vhost_crypto_writeback_data *
 705 prepare_write_back_data(struct vhost_crypto_data_req *vc_req,
 706                 struct vring_desc **cur_desc,
 707                 struct vhost_crypto_writeback_data **end_wb_data,
 708                 uint8_t *src,
 709                 uint32_t offset,
 710                 uint64_t write_back_len,
 711                 uint32_t *nb_descs)
 712 {
 713         struct vhost_crypto_writeback_data *wb_data, *head;
 714         struct vring_desc *desc = *cur_desc;
 715         uint64_t dlen;
 716         uint8_t *dst;
 717         int ret;
 718
 719         ret = rte_mempool_get(vc_req->wb_pool, (void **)&head);
 720         if (unlikely(ret < 0)) {
 721                 VC_LOG_ERR("no memory");
 722                 goto error_exit;
 723         }
 724
 725         wb_data = head;
 726
 727         if (likely(desc->len > offset)) {
 728                 wb_data->src = src + offset;
 729                 dlen = desc->len;
 730                 dst = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr,
 731                         &dlen, VHOST_ACCESS_RW) + offset;
 732                 if (unlikely(!dst || dlen != desc->len)) {
 733                         VC_LOG_ERR("Failed to map descriptor");
 734                         goto error_exit;
 735                 }
 736
 737                 wb_data->dst = dst;
 738                 wb_data->len = desc->len - offset;
 739                 write_back_len -= wb_data->len;
 740                 src += offset + wb_data->len;
 741                 offset = 0;
 742
 743                 if (unlikely(write_back_len)) {
 744                         ret = rte_mempool_get(vc_req->wb_pool,
 745                                         (void **)&(wb_data->next));
 746                         if (unlikely(ret < 0)) {
 747                                 VC_LOG_ERR("no memory");
 748                                 goto error_exit;
 749                         }
 750
 751                         wb_data = wb_data->next;
 752                 } else
 753                         wb_data->next = NULL;
 754         } else
 755                 offset -= desc->len;
 756
 757         while (write_back_len) {
 758                 if (unlikely(*nb_descs == 0)) {
 759                         VC_LOG_ERR("Invalid descriptors");
 760                         goto error_exit;
 761                 }
 762                 (*nb_descs)--;
 763
 764                 desc = &vc_req->head[desc->next];
 765                 if (unlikely(!(desc->flags & VRING_DESC_F_WRITE))) {
 766                         VC_LOG_ERR("incorrect descriptor");
 767                         goto error_exit;
 768                 }
 769
 770                 if (desc->len <= offset) {
 771                         offset -= desc->len;
 772                         continue;
 773                 }
 774
 775                 dlen = desc->len;
 776                 dst = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr, &dlen,
 777                                 VHOST_ACCESS_RW) + offset;
 778                 if (unlikely(dst == NULL || dlen != desc->len)) {
 779                         VC_LOG_ERR("Failed to map descriptor");
 780                         goto error_exit;
 781                 }
 782
 783                 wb_data->src = src;
 784                 wb_data->dst = dst;
 785                 wb_data->len = RTE_MIN(desc->len - offset, write_back_len);
 786                 write_back_len -= wb_data->len;
 787                 src += wb_data->len;
 788                 offset = 0;
 789
 790                 if (write_back_len) {
 791                         ret = rte_mempool_get(vc_req->wb_pool,
 792                                         (void **)&(wb_data->next));
 793                         if (unlikely(ret < 0)) {
 794                                 VC_LOG_ERR("no memory");
 795                                 goto error_exit;
 796                         }
 797
 798                         wb_data = wb_data->next;
 799                 } else
 800                         wb_data->next = NULL;
 801         }
 802
 803         if (unlikely(*nb_descs == 0))
 804                 *cur_desc = NULL;
 805         else
 806                 *cur_desc = &vc_req->head[desc->next];
 807
 808         *end_wb_data = wb_data;
 809
 810         return head;
 811
 812 error_exit:
 813         if (head)
 814                 free_wb_data(head, vc_req->wb_pool);
 815
 816         return NULL;
 817 }
 818
 819 static uint8_t
 820 prepare_sym_cipher_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op,
 821                 struct vhost_crypto_data_req *vc_req,
 822                 struct virtio_crypto_cipher_data_req *cipher,
 823                 struct vring_desc *cur_desc,
 824                 uint32_t *nb_descs)
 825 {
 826         struct vring_desc *desc = cur_desc;
 827         struct vhost_crypto_writeback_data *ewb = NULL;
 828         struct rte_mbuf *m_src = op->sym->m_src, *m_dst = op->sym->m_dst;
 829         uint8_t *iv_data = rte_crypto_op_ctod_offset(op, uint8_t *, IV_OFFSET);
 830         uint8_t ret = 0;
 831
 832         /* prepare */
 833         /* iv */
 834         if (unlikely(copy_data(iv_data, vc_req, &desc, cipher->para.iv_len,
 835                         nb_descs) < 0)) {
 836                 ret = VIRTIO_CRYPTO_BADMSG;
 837                 goto error_exit;
 838         }
 839
 840         m_src->data_len = cipher->para.src_data_len;
 841
 842         switch (vcrypto->option) {
 843         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
 844                 m_src->buf_iova = gpa_to_hpa(vcrypto->dev, desc->addr,
 845                                 cipher->para.src_data_len);
 846                 m_src->buf_addr = get_data_ptr(vc_req, desc, VHOST_ACCESS_RO);
 847                 if (unlikely(m_src->buf_iova == 0 ||
 848                                 m_src->buf_addr == NULL)) {
 849                         VC_LOG_ERR("zero_copy may fail due to cross page data");
 850                         ret = VIRTIO_CRYPTO_ERR;
 851                         goto error_exit;
 852                 }
 853
 854                 if (unlikely(move_desc(vc_req->head, &desc,
 855                                 cipher->para.src_data_len, nb_descs) < 0)) {
 856                         VC_LOG_ERR("Incorrect descriptor");
 857                         ret = VIRTIO_CRYPTO_ERR;
 858                         goto error_exit;
 859                 }
 860
 861                 break;
 862         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
 863                 vc_req->wb_pool = vcrypto->wb_pool;
 864
 865                 if (unlikely(cipher->para.src_data_len >
 866                                 RTE_MBUF_DEFAULT_BUF_SIZE)) {
 867                         VC_LOG_ERR("Not enough space to do data copy");
 868                         ret = VIRTIO_CRYPTO_ERR;
 869                         goto error_exit;
 870                 }
 871                 if (unlikely(copy_data(rte_pktmbuf_mtod(m_src, uint8_t *),
 872                                 vc_req, &desc, cipher->para.src_data_len,
 873                                 nb_descs) < 0)) {
 874                         ret = VIRTIO_CRYPTO_BADMSG;
 875                         goto error_exit;
 876                 }
 877                 break;
 878         default:
 879                 ret = VIRTIO_CRYPTO_BADMSG;
 880                 goto error_exit;
 881         }
 882
 883         /* dst */
 884         desc = find_write_desc(vc_req->head, desc, nb_descs);
 885         if (unlikely(!desc)) {
 886                 VC_LOG_ERR("Cannot find write location");
 887                 ret = VIRTIO_CRYPTO_BADMSG;
 888                 goto error_exit;
 889         }
 890
 891         switch (vcrypto->option) {
 892         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
 893                 m_dst->buf_iova = gpa_to_hpa(vcrypto->dev,
 894                                 desc->addr, cipher->para.dst_data_len);
 895                 m_dst->buf_addr = get_data_ptr(vc_req, desc, VHOST_ACCESS_RW);
 896                 if (unlikely(m_dst->buf_iova == 0 || m_dst->buf_addr == NULL)) {
 897                         VC_LOG_ERR("zero_copy may fail due to cross page data");
 898                         ret = VIRTIO_CRYPTO_ERR;
 899                         goto error_exit;
 900                 }
 901
 902                 if (unlikely(move_desc(vc_req->head, &desc,
 903                                 cipher->para.dst_data_len, nb_descs) < 0)) {
 904                         VC_LOG_ERR("Incorrect descriptor");
 905                         ret = VIRTIO_CRYPTO_ERR;
 906                         goto error_exit;
 907                 }
 908
 909                 m_dst->data_len = cipher->para.dst_data_len;
 910                 break;
 911         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
 912                 vc_req->wb = prepare_write_back_data(vc_req, &desc, &ewb,
 913                                 rte_pktmbuf_mtod(m_src, uint8_t *), 0,
 914                                 cipher->para.dst_data_len, nb_descs);
 915                 if (unlikely(vc_req->wb == NULL)) {
 916                         ret = VIRTIO_CRYPTO_ERR;
 917                         goto error_exit;
 918                 }
 919
 920                 break;
 921         default:
 922                 ret = VIRTIO_CRYPTO_BADMSG;
 923                 goto error_exit;
 924         }
 925
 926         /* src data */
 927         op->type = RTE_CRYPTO_OP_TYPE_SYMMETRIC;
 928         op->sess_type = RTE_CRYPTO_OP_WITH_SESSION;
 929
 930         op->sym->cipher.data.offset = 0;
 931         op->sym->cipher.data.length = cipher->para.src_data_len;
 932
 933         vc_req->inhdr = get_data_ptr(vc_req, desc, VHOST_ACCESS_WO);
 934         if (unlikely(vc_req->inhdr == NULL)) {
 935                 ret = VIRTIO_CRYPTO_BADMSG;
 936                 goto error_exit;
 937         }
 938
 939         vc_req->inhdr->status = VIRTIO_CRYPTO_OK;
 940         vc_req->len = cipher->para.dst_data_len + INHDR_LEN;
 941
 942         return 0;
 943
 944 error_exit:
 945         if (vc_req->wb)
 946                 free_wb_data(vc_req->wb, vc_req->wb_pool);
 947
 948         vc_req->len = INHDR_LEN;
 949         return ret;
 950 }
 951
 952 static uint8_t
 953 prepare_sym_chain_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op,
 954                 struct vhost_crypto_data_req *vc_req,
 955                 struct virtio_crypto_alg_chain_data_req *chain,
 956                 struct vring_desc *cur_desc,
 957                 uint32_t *nb_descs)
 958 {
 959         struct vring_desc *desc = cur_desc, *digest_desc;
 960         struct vhost_crypto_writeback_data *ewb = NULL, *ewb2 = NULL;
 961         struct rte_mbuf *m_src = op->sym->m_src, *m_dst = op->sym->m_dst;
 962         uint8_t *iv_data = rte_crypto_op_ctod_offset(op, uint8_t *, IV_OFFSET);
 963         uint32_t digest_offset;
 964         void *digest_addr;
 965         uint8_t ret = 0;
 966
 967         /* prepare */
 968         /* iv */
 969         if (unlikely(copy_data(iv_data, vc_req, &desc,
 970                         chain->para.iv_len, nb_descs) < 0)) {
 971                 ret = VIRTIO_CRYPTO_BADMSG;
 972                 goto error_exit;
 973         }
 974
 975         m_src->data_len = chain->para.src_data_len;
 976
 977         switch (vcrypto->option) {
 978         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
 979                 m_dst->data_len = chain->para.dst_data_len;
 980
 981                 m_src->buf_iova = gpa_to_hpa(vcrypto->dev, desc->addr,
 982                                 chain->para.src_data_len);
 983                 m_src->buf_addr = get_data_ptr(vc_req, desc, VHOST_ACCESS_RO);
 984                 if (unlikely(m_src->buf_iova == 0 || m_src->buf_addr == NULL)) {
 985                         VC_LOG_ERR("zero_copy may fail due to cross page data");
 986                         ret = VIRTIO_CRYPTO_ERR;
 987                         goto error_exit;
 988                 }
 989
 990                 if (unlikely(move_desc(vc_req->head, &desc,
 991                                 chain->para.src_data_len, nb_descs) < 0)) {
 992                         VC_LOG_ERR("Incorrect descriptor");
 993                         ret = VIRTIO_CRYPTO_ERR;
 994                         goto error_exit;
 995                 }
 996                 break;
 997         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
 998                 vc_req->wb_pool = vcrypto->wb_pool;
 999
1000                 if (unlikely(chain->para.src_data_len >
1001                                 RTE_MBUF_DEFAULT_BUF_SIZE)) {
1002                         VC_LOG_ERR("Not enough space to do data copy");
1003                         ret = VIRTIO_CRYPTO_ERR;
1004                         goto error_exit;
1005                 }
1006                 if (unlikely(copy_data(rte_pktmbuf_mtod(m_src, uint8_t *),
1007                                 vc_req, &desc, chain->para.src_data_len,
1008                                 nb_descs)) < 0) {
1009                         ret = VIRTIO_CRYPTO_BADMSG;
1010                         goto error_exit;
1011                 }
1012
1013                 break;
1014         default:
1015                 ret = VIRTIO_CRYPTO_BADMSG;
1016                 goto error_exit;
1017         }
1018
1019         /* dst */
1020         desc = find_write_desc(vc_req->head, desc, nb_descs);
1021         if (unlikely(!desc)) {
1022                 VC_LOG_ERR("Cannot find write location");
1023                 ret = VIRTIO_CRYPTO_BADMSG;
1024                 goto error_exit;
1025         }
1026
1027         switch (vcrypto->option) {
1028         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
1029                 m_dst->buf_iova = gpa_to_hpa(vcrypto->dev,
1030                                 desc->addr, chain->para.dst_data_len);
1031                 m_dst->buf_addr = get_data_ptr(vc_req, desc, VHOST_ACCESS_RW);
1032                 if (unlikely(m_dst->buf_iova == 0 || m_dst->buf_addr == NULL)) {
1033                         VC_LOG_ERR("zero_copy may fail due to cross page data");
1034                         ret = VIRTIO_CRYPTO_ERR;
1035                         goto error_exit;
1036                 }
1037
1038                 if (unlikely(move_desc(vc_req->head, &desc,
1039                                 chain->para.dst_data_len, nb_descs) < 0)) {
1040                         VC_LOG_ERR("Incorrect descriptor");
1041                         ret = VIRTIO_CRYPTO_ERR;
1042                         goto error_exit;
1043                 }
1044
1045                 op->sym->auth.digest.phys_addr = gpa_to_hpa(vcrypto->dev,
1046                                 desc->addr, chain->para.hash_result_len);
1047                 op->sym->auth.digest.data = get_data_ptr(vc_req, desc,
1048                                 VHOST_ACCESS_RW);
1049                 if (unlikely(op->sym->auth.digest.phys_addr == 0)) {
1050                         VC_LOG_ERR("zero_copy may fail due to cross page data");
1051                         ret = VIRTIO_CRYPTO_ERR;
1052                         goto error_exit;
1053                 }
1054
1055                 if (unlikely(move_desc(vc_req->head, &desc,
1056                                 chain->para.hash_result_len, nb_descs) < 0)) {
1057                         VC_LOG_ERR("Incorrect descriptor");
1058                         ret = VIRTIO_CRYPTO_ERR;
1059                         goto error_exit;
1060                 }
1061
1062                 break;
1063         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
1064                 vc_req->wb = prepare_write_back_data(vc_req, &desc, &ewb,
1065                                 rte_pktmbuf_mtod(m_src, uint8_t *),
1066                                 chain->para.cipher_start_src_offset,
1067                                 chain->para.dst_data_len -
1068                                 chain->para.cipher_start_src_offset, nb_descs);
1069                 if (unlikely(vc_req->wb == NULL)) {
1070                         ret = VIRTIO_CRYPTO_ERR;
1071                         goto error_exit;
1072                 }
1073
1074                 digest_offset = m_src->data_len;
1075                 digest_addr = rte_pktmbuf_mtod_offset(m_src, void *,
1076                                 digest_offset);
1077                 digest_desc = desc;
1078
1079                 /** create a wb_data for digest */
1080                 ewb->next = prepare_write_back_data(vc_req, &desc, &ewb2,
1081                                 digest_addr, 0, chain->para.hash_result_len,
1082                                 nb_descs);
1083                 if (unlikely(ewb->next == NULL)) {
1084                         ret = VIRTIO_CRYPTO_ERR;
1085                         goto error_exit;
1086                 }
1087
1088                 if (unlikely(copy_data(digest_addr, vc_req, &digest_desc,
1089                                 chain->para.hash_result_len, nb_descs)) < 0) {
1090                         ret = VIRTIO_CRYPTO_BADMSG;
1091                         goto error_exit;
1092                 }
1093
1094                 op->sym->auth.digest.data = digest_addr;
1095                 op->sym->auth.digest.phys_addr = rte_pktmbuf_iova_offset(m_src,
1096                                 digest_offset);
1097                 break;
1098         default:
1099                 ret = VIRTIO_CRYPTO_BADMSG;
1100                 goto error_exit;
1101         }
1102
1103         /* record inhdr */
1104         vc_req->inhdr = get_data_ptr(vc_req, desc, VHOST_ACCESS_WO);
1105         if (unlikely(vc_req->inhdr == NULL)) {
1106                 ret = VIRTIO_CRYPTO_BADMSG;
1107                 goto error_exit;
1108         }
1109
1110         vc_req->inhdr->status = VIRTIO_CRYPTO_OK;
1111
1112         op->type = RTE_CRYPTO_OP_TYPE_SYMMETRIC;
1113         op->sess_type = RTE_CRYPTO_OP_WITH_SESSION;
1114
1115         op->sym->cipher.data.offset = chain->para.cipher_start_src_offset;
1116         op->sym->cipher.data.length = chain->para.src_data_len -
1117                         chain->para.cipher_start_src_offset;
1118
1119         op->sym->auth.data.offset = chain->para.hash_start_src_offset;
1120         op->sym->auth.data.length = chain->para.len_to_hash;
1121
1122         vc_req->len = chain->para.dst_data_len + chain->para.hash_result_len +
1123                         INHDR_LEN;
1124         return 0;
1125
1126 error_exit:
1127         if (vc_req->wb)
1128                 free_wb_data(vc_req->wb, vc_req->wb_pool);
1129         vc_req->len = INHDR_LEN;
1130         return ret;
1131 }
1132
1133 /**
1134  * Process on descriptor
1135  */
1136 static __rte_always_inline int
1137 vhost_crypto_process_one_req(struct vhost_crypto *vcrypto,
1138                 struct vhost_virtqueue *vq, struct rte_crypto_op *op,
1139                 struct vring_desc *head, uint16_t desc_idx)
1140 {
1141         struct vhost_crypto_data_req *vc_req = rte_mbuf_to_priv(op->sym->m_src);
1142         struct rte_cryptodev_sym_session *session;
1143         struct virtio_crypto_op_data_req *req, tmp_req;
1144         struct virtio_crypto_inhdr *inhdr;
1145         struct vring_desc *desc = NULL;
1146         uint64_t session_id;
1147         uint64_t dlen;
1148         uint32_t nb_descs = vq->size;
1149         int err = 0;
1150
1151         vc_req->desc_idx = desc_idx;
1152         vc_req->dev = vcrypto->dev;
1153         vc_req->vq = vq;
1154
1155         if (likely(head->flags & VRING_DESC_F_INDIRECT)) {
1156                 dlen = head->len;
1157                 nb_descs = dlen / sizeof(struct vring_desc);
1158                 /* drop invalid descriptors */
1159                 if (unlikely(nb_descs > vq->size))
1160                         return -1;
1161                 desc = IOVA_TO_VVA(struct vring_desc *, vc_req, head->addr,
1162                                 &dlen, VHOST_ACCESS_RO);
1163                 if (unlikely(!desc || dlen != head->len))
1164                         return -1;
1165                 desc_idx = 0;
1166                 head = desc;
1167         } else {
1168                 desc = head;
1169         }
1170
1171         vc_req->head = head;
1172         vc_req->zero_copy = vcrypto->option;
1173
1174         req = get_data_ptr(vc_req, desc, VHOST_ACCESS_RO);
1175         if (unlikely(req == NULL)) {
1176                 switch (vcrypto->option) {
1177                 case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
1178                         err = VIRTIO_CRYPTO_BADMSG;
1179                         VC_LOG_ERR("Invalid descriptor");
1180                         goto error_exit;
1181                 case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
1182                         req = &tmp_req;
1183                         if (unlikely(copy_data(req, vc_req, &desc, sizeof(*req),
1184                                         &nb_descs) < 0)) {
1185                                 err = VIRTIO_CRYPTO_BADMSG;
1186                                 VC_LOG_ERR("Invalid descriptor");
1187                                 goto error_exit;
1188                         }
1189                         break;
1190                 default:
1191                         err = VIRTIO_CRYPTO_ERR;
1192                         VC_LOG_ERR("Invalid option");
1193                         goto error_exit;
1194                 }
1195         } else {
1196                 if (unlikely(move_desc(vc_req->head, &desc,
1197                                 sizeof(*req), &nb_descs) < 0)) {
1198                         VC_LOG_ERR("Incorrect descriptor");
1199                         goto error_exit;
1200                 }
1201         }
1202
1203         switch (req->header.opcode) {
1204         case VIRTIO_CRYPTO_CIPHER_ENCRYPT:
1205         case VIRTIO_CRYPTO_CIPHER_DECRYPT:
1206                 session_id = req->header.session_id;
1207
1208                 /* one branch to avoid unnecessary table lookup */
1209                 if (vcrypto->cache_session_id != session_id) {
1210                         err = rte_hash_lookup_data(vcrypto->session_map,
1211                                         &session_id, (void **)&session);
1212                         if (unlikely(err < 0)) {
1213                                 err = VIRTIO_CRYPTO_ERR;
1214                                 VC_LOG_ERR("Failed to find session %"PRIu64,
1215                                                 session_id);
1216                                 goto error_exit;
1217                         }
1218
1219                         vcrypto->cache_session = session;
1220                         vcrypto->cache_session_id = session_id;
1221                 }
1222
1223                 session = vcrypto->cache_session;
1224
1225                 err = rte_crypto_op_attach_sym_session(op, session);
1226                 if (unlikely(err < 0)) {
1227                         err = VIRTIO_CRYPTO_ERR;
1228                         VC_LOG_ERR("Failed to attach session to op");
1229                         goto error_exit;
1230                 }
1231
1232                 switch (req->u.sym_req.op_type) {
1233                 case VIRTIO_CRYPTO_SYM_OP_NONE:
1234                         err = VIRTIO_CRYPTO_NOTSUPP;
1235                         break;
1236                 case VIRTIO_CRYPTO_SYM_OP_CIPHER:
1237                         err = prepare_sym_cipher_op(vcrypto, op, vc_req,
1238                                         &req->u.sym_req.u.cipher, desc,
1239                                         &nb_descs);
1240                         break;
1241                 case VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING:
1242                         err = prepare_sym_chain_op(vcrypto, op, vc_req,
1243                                         &req->u.sym_req.u.chain, desc,
1244                                         &nb_descs);
1245                         break;
1246                 }
1247                 if (unlikely(err != 0)) {
1248                         VC_LOG_ERR("Failed to process sym request");
1249                         goto error_exit;
1250                 }
1251                 break;
1252         default:
1253                 VC_LOG_ERR("Unsupported symmetric crypto request type %u",
1254                                 req->header.opcode);
1255                 goto error_exit;
1256         }
1257
1258         return 0;
1259
1260 error_exit:
1261
1262         inhdr = reach_inhdr(vc_req, desc, &nb_descs);
1263         if (likely(inhdr != NULL))
1264                 inhdr->status = (uint8_t)err;
1265
1266         return -1;
1267 }
1268
1269 static __rte_always_inline struct vhost_virtqueue *
1270 vhost_crypto_finalize_one_request(struct rte_crypto_op *op,
1271                 struct vhost_virtqueue *old_vq)
1272 {
1273         struct rte_mbuf *m_src = op->sym->m_src;
1274         struct rte_mbuf *m_dst = op->sym->m_dst;
1275         struct vhost_crypto_data_req *vc_req = rte_mbuf_to_priv(m_src);
1276         uint16_t desc_idx;
1277
1278         if (unlikely(!vc_req)) {
1279                 VC_LOG_ERR("Failed to retrieve vc_req");
1280                 return NULL;
1281         }
1282
1283         if (old_vq && (vc_req->vq != old_vq))
1284                 return vc_req->vq;
1285
1286         desc_idx = vc_req->desc_idx;
1287
1288         if (unlikely(op->status != RTE_CRYPTO_OP_STATUS_SUCCESS))
1289                 vc_req->inhdr->status = VIRTIO_CRYPTO_ERR;
1290         else {
1291                 if (vc_req->zero_copy == 0)
1292                         write_back_data(vc_req);
1293         }
1294
1295         vc_req->vq->used->ring[desc_idx].id = desc_idx;
1296         vc_req->vq->used->ring[desc_idx].len = vc_req->len;
1297
1298         rte_mempool_put(m_src->pool, (void *)m_src);
1299
1300         if (m_dst)
1301                 rte_mempool_put(m_dst->pool, (void *)m_dst);
1302
1303         return vc_req->vq;
1304 }
1305
1306 static __rte_always_inline uint16_t
1307 vhost_crypto_complete_one_vm_requests(struct rte_crypto_op **ops,
1308                 uint16_t nb_ops, int *callfd)
1309 {
1310         uint16_t processed = 1;
1311         struct vhost_virtqueue *vq, *tmp_vq;
1312
1313         if (unlikely(nb_ops == 0))
1314                 return 0;
1315
1316         vq = vhost_crypto_finalize_one_request(ops[0], NULL);
1317         if (unlikely(vq == NULL))
1318                 return 0;
1319         tmp_vq = vq;
1320
1321         while ((processed < nb_ops)) {
1322                 tmp_vq = vhost_crypto_finalize_one_request(ops[processed],
1323                                 tmp_vq);
1324
1325                 if (unlikely(vq != tmp_vq))
1326                         break;
1327
1328                 processed++;
1329         }
1330
1331         *callfd = vq->callfd;
1332
1333         *(volatile uint16_t *)&vq->used->idx += processed;
1334
1335         return processed;
1336 }
1337
1338 int __rte_experimental
1339 rte_vhost_crypto_create(int vid, uint8_t cryptodev_id,
1340                 struct rte_mempool *sess_pool,
1341                 struct rte_mempool *sess_priv_pool,
1342                 int socket_id)
1343 {
1344         struct virtio_net *dev = get_device(vid);
1345         struct rte_hash_parameters params = {0};
1346         struct vhost_crypto *vcrypto;
1347         char name[128];
1348         int ret;
1349
1350         if (!dev) {
1351                 VC_LOG_ERR("Invalid vid %i", vid);
1352                 return -EINVAL;
1353         }
1354
1355         ret = rte_vhost_driver_set_features(dev->ifname,
1356                         VIRTIO_CRYPTO_FEATURES);
1357         if (ret < 0) {
1358                 VC_LOG_ERR("Error setting features");
1359                 return -1;
1360         }
1361
1362         vcrypto = rte_zmalloc_socket(NULL, sizeof(*vcrypto),
1363                         RTE_CACHE_LINE_SIZE, socket_id);
1364         if (!vcrypto) {
1365                 VC_LOG_ERR("Insufficient memory");
1366                 return -ENOMEM;
1367         }
1368
1369         vcrypto->sess_pool = sess_pool;
1370         vcrypto->sess_priv_pool = sess_priv_pool;
1371         vcrypto->cid = cryptodev_id;
1372         vcrypto->cache_session_id = UINT64_MAX;
1373         vcrypto->last_session_id = 1;
1374         vcrypto->dev = dev;
1375         vcrypto->option = RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE;
1376
1377         snprintf(name, 127, "HASH_VHOST_CRYPT_%u", (uint32_t)vid);
1378         params.name = name;
1379         params.entries = VHOST_CRYPTO_SESSION_MAP_ENTRIES;
1380         params.hash_func = rte_jhash;
1381         params.key_len = sizeof(uint64_t);
1382         params.socket_id = socket_id;
1383         vcrypto->session_map = rte_hash_create(&params);
1384         if (!vcrypto->session_map) {
1385                 VC_LOG_ERR("Failed to creath session map");
1386                 ret = -ENOMEM;
1387                 goto error_exit;
1388         }
1389
1390         snprintf(name, 127, "MBUF_POOL_VM_%u", (uint32_t)vid);
1391         vcrypto->mbuf_pool = rte_pktmbuf_pool_create(name,
1392                         VHOST_CRYPTO_MBUF_POOL_SIZE, 512,
1393                         sizeof(struct vhost_crypto_data_req),
1394                         RTE_MBUF_DEFAULT_DATAROOM * 2 + RTE_PKTMBUF_HEADROOM,
1395                         rte_socket_id());
1396         if (!vcrypto->mbuf_pool) {
1397                 VC_LOG_ERR("Failed to creath mbuf pool");
1398                 ret = -ENOMEM;
1399                 goto error_exit;
1400         }
1401
1402         snprintf(name, 127, "WB_POOL_VM_%u", (uint32_t)vid);
1403         vcrypto->wb_pool = rte_mempool_create(name,
1404                         VHOST_CRYPTO_MBUF_POOL_SIZE,
1405                         sizeof(struct vhost_crypto_writeback_data),
1406                         128, 0, NULL, NULL, NULL, NULL,
1407                         rte_socket_id(), 0);
1408         if (!vcrypto->wb_pool) {
1409                 VC_LOG_ERR("Failed to creath mempool");
1410                 ret = -ENOMEM;
1411                 goto error_exit;
1412         }
1413
1414         dev->extern_data = vcrypto;
1415         dev->extern_ops.pre_msg_handle = NULL;
1416         dev->extern_ops.post_msg_handle = vhost_crypto_msg_post_handler;
1417
1418         return 0;
1419
1420 error_exit:
1421         if (vcrypto->session_map)
1422                 rte_hash_free(vcrypto->session_map);
1423         if (vcrypto->mbuf_pool)
1424                 rte_mempool_free(vcrypto->mbuf_pool);
1425
1426         rte_free(vcrypto);
1427
1428         return ret;
1429 }
1430
1431 int __rte_experimental
1432 rte_vhost_crypto_free(int vid)
1433 {
1434         struct virtio_net *dev = get_device(vid);
1435         struct vhost_crypto *vcrypto;
1436
1437         if (unlikely(dev == NULL)) {
1438                 VC_LOG_ERR("Invalid vid %i", vid);
1439                 return -EINVAL;
1440         }
1441
1442         vcrypto = dev->extern_data;
1443         if (unlikely(vcrypto == NULL)) {
1444                 VC_LOG_ERR("Cannot find required data, is it initialized?");
1445                 return -ENOENT;
1446         }
1447
1448         rte_hash_free(vcrypto->session_map);
1449         rte_mempool_free(vcrypto->mbuf_pool);
1450         rte_mempool_free(vcrypto->wb_pool);
1451         rte_free(vcrypto);
1452
1453         dev->extern_data = NULL;
1454         dev->extern_ops.pre_msg_handle = NULL;
1455         dev->extern_ops.post_msg_handle = NULL;
1456
1457         return 0;
1458 }
1459
1460 int __rte_experimental
1461 rte_vhost_crypto_set_zero_copy(int vid, enum rte_vhost_crypto_zero_copy option)
1462 {
1463         struct virtio_net *dev = get_device(vid);
1464         struct vhost_crypto *vcrypto;
1465
1466         if (unlikely(dev == NULL)) {
1467                 VC_LOG_ERR("Invalid vid %i", vid);
1468                 return -EINVAL;
1469         }
1470
1471         if (unlikely((uint32_t)option >=
1472                                 RTE_VHOST_CRYPTO_MAX_ZERO_COPY_OPTIONS)) {
1473                 VC_LOG_ERR("Invalid option %i", option);
1474                 return -EINVAL;
1475         }
1476
1477         vcrypto = (struct vhost_crypto *)dev->extern_data;
1478         if (unlikely(vcrypto == NULL)) {
1479                 VC_LOG_ERR("Cannot find required data, is it initialized?");
1480                 return -ENOENT;
1481         }
1482
1483         if (vcrypto->option == (uint8_t)option)
1484                 return 0;
1485
1486         if (!(rte_mempool_full(vcrypto->mbuf_pool)) ||
1487                         !(rte_mempool_full(vcrypto->wb_pool))) {
1488                 VC_LOG_ERR("Cannot update zero copy as mempool is not full");
1489                 return -EINVAL;
1490         }
1491
1492         if (option == RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE) {
1493                 char name[128];
1494
1495                 snprintf(name, 127, "WB_POOL_VM_%u", (uint32_t)vid);
1496                 vcrypto->wb_pool = rte_mempool_create(name,
1497                                 VHOST_CRYPTO_MBUF_POOL_SIZE,
1498                                 sizeof(struct vhost_crypto_writeback_data),
1499                                 128, 0, NULL, NULL, NULL, NULL,
1500                                 rte_socket_id(), 0);
1501                 if (!vcrypto->wb_pool) {
1502                         VC_LOG_ERR("Failed to creath mbuf pool");
1503                         return -ENOMEM;
1504                 }
1505         } else {
1506                 rte_mempool_free(vcrypto->wb_pool);
1507                 vcrypto->wb_pool = NULL;
1508         }
1509
1510         vcrypto->option = (uint8_t)option;
1511
1512         return 0;
1513 }
1514
1515 uint16_t __rte_experimental
1516 rte_vhost_crypto_fetch_requests(int vid, uint32_t qid,
1517                 struct rte_crypto_op **ops, uint16_t nb_ops)
1518 {
1519         struct rte_mbuf *mbufs[VHOST_CRYPTO_MAX_BURST_SIZE * 2];
1520         struct virtio_net *dev = get_device(vid);
1521         struct vhost_crypto *vcrypto;
1522         struct vhost_virtqueue *vq;
1523         uint16_t avail_idx;
1524         uint16_t start_idx;
1525         uint16_t count;
1526         uint16_t i = 0;
1527
1528         if (unlikely(dev == NULL)) {
1529                 VC_LOG_ERR("Invalid vid %i", vid);
1530                 return -EINVAL;
1531         }
1532
1533         if (unlikely(qid >= VHOST_MAX_QUEUE_PAIRS)) {
1534                 VC_LOG_ERR("Invalid qid %u", qid);
1535                 return -EINVAL;
1536         }
1537
1538         vcrypto = (struct vhost_crypto *)dev->extern_data;
1539         if (unlikely(vcrypto == NULL)) {
1540                 VC_LOG_ERR("Cannot find required data, is it initialized?");
1541                 return -ENOENT;
1542         }
1543
1544         vq = dev->virtqueue[qid];
1545
1546         avail_idx = *((volatile uint16_t *)&vq->avail->idx);
1547         start_idx = vq->last_used_idx;
1548         count = avail_idx - start_idx;
1549         count = RTE_MIN(count, VHOST_CRYPTO_MAX_BURST_SIZE);
1550         count = RTE_MIN(count, nb_ops);
1551
1552         if (unlikely(count == 0))
1553                 return 0;
1554
1555         /* for zero copy, we need 2 empty mbufs for src and dst, otherwise
1556          * we need only 1 mbuf as src and dst
1557          */
1558         switch (vcrypto->option) {
1559         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
1560                 if (unlikely(rte_mempool_get_bulk(vcrypto->mbuf_pool,
1561                                 (void **)mbufs, count * 2) < 0)) {
1562                         VC_LOG_ERR("Insufficient memory");
1563                         return -ENOMEM;
1564                 }
1565
1566                 for (i = 0; i < count; i++) {
1567                         uint16_t used_idx = (start_idx + i) & (vq->size - 1);
1568                         uint16_t desc_idx = vq->avail->ring[used_idx];
1569                         struct vring_desc *head = &vq->desc[desc_idx];
1570                         struct rte_crypto_op *op = ops[i];
1571
1572                         op->sym->m_src = mbufs[i * 2];
1573                         op->sym->m_dst = mbufs[i * 2 + 1];
1574                         op->sym->m_src->data_off = 0;
1575                         op->sym->m_dst->data_off = 0;
1576
1577                         if (unlikely(vhost_crypto_process_one_req(vcrypto, vq,
1578                                         op, head, desc_idx)) < 0)
1579                                 break;
1580                 }
1581
1582                 if (unlikely(i < count))
1583                         rte_mempool_put_bulk(vcrypto->mbuf_pool,
1584                                         (void **)&mbufs[i * 2],
1585                                         (count - i) * 2);
1586
1587                 break;
1588
1589         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
1590                 if (unlikely(rte_mempool_get_bulk(vcrypto->mbuf_pool,
1591                                 (void **)mbufs, count) < 0)) {
1592                         VC_LOG_ERR("Insufficient memory");
1593                         return -ENOMEM;
1594                 }
1595
1596                 for (i = 0; i < count; i++) {
1597                         uint16_t used_idx = (start_idx + i) & (vq->size - 1);
1598                         uint16_t desc_idx = vq->avail->ring[used_idx];
1599                         struct vring_desc *head = &vq->desc[desc_idx];
1600                         struct rte_crypto_op *op = ops[i];
1601
1602                         op->sym->m_src = mbufs[i];
1603                         op->sym->m_dst = NULL;
1604                         op->sym->m_src->data_off = 0;
1605
1606                         if (unlikely(vhost_crypto_process_one_req(vcrypto, vq,
1607                                         op, head, desc_idx)) < 0)
1608                                 break;
1609                 }
1610
1611                 if (unlikely(i < count))
1612                         rte_mempool_put_bulk(vcrypto->mbuf_pool,
1613                                         (void **)&mbufs[i],
1614                                         count - i);
1615
1616                 break;
1617
1618         }
1619
1620         vq->last_used_idx += i;
1621
1622         return i;
1623 }
1624
1625 uint16_t __rte_experimental
1626 rte_vhost_crypto_finalize_requests(struct rte_crypto_op **ops,
1627                 uint16_t nb_ops, int *callfds, uint16_t *nb_callfds)
1628 {
1629         struct rte_crypto_op **tmp_ops = ops;
1630         uint16_t count = 0, left = nb_ops;
1631         int callfd;
1632         uint16_t idx = 0;
1633
1634         while (left) {
1635                 count = vhost_crypto_complete_one_vm_requests(tmp_ops, left,
1636                                 &callfd);
1637                 if (unlikely(count == 0))
1638                         break;
1639
1640                 tmp_ops = &tmp_ops[count];
1641                 left -= count;
1642
1643                 callfds[idx++] = callfd;
1644
1645                 if (unlikely(idx >= VIRTIO_CRYPTO_MAX_NUM_BURST_VQS)) {
1646                         VC_LOG_ERR("Too many vqs");
1647                         break;
1648                 }
1649         }
1650
1651         *nb_callfds = idx;
1652
1653         return nb_ops - left;
1654 }