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