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