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                 (1 << VHOST_USER_PROTOCOL_F_CONFIG))
  45
  46 #define IOVA_TO_VVA(t, r, a, l, p)                                      \
  47         ((t)(uintptr_t)vhost_iova_to_vva(r->dev, r->vq, a, l, p))
  48
  49 static int
  50 cipher_algo_transform(uint32_t virtio_cipher_algo,
  51                 enum rte_crypto_cipher_algorithm *algo)
  52 {
  53         switch (virtio_cipher_algo) {
  54         case VIRTIO_CRYPTO_CIPHER_AES_CBC:
  55                 *algo = RTE_CRYPTO_CIPHER_AES_CBC;
  56                 break;
  57         case VIRTIO_CRYPTO_CIPHER_AES_CTR:
  58                 *algo = RTE_CRYPTO_CIPHER_AES_CTR;
  59                 break;
  60         case VIRTIO_CRYPTO_CIPHER_DES_ECB:
  61                 *algo = -VIRTIO_CRYPTO_NOTSUPP;
  62                 break;
  63         case VIRTIO_CRYPTO_CIPHER_DES_CBC:
  64                 *algo = RTE_CRYPTO_CIPHER_DES_CBC;
  65                 break;
  66         case VIRTIO_CRYPTO_CIPHER_3DES_ECB:
  67                 *algo = RTE_CRYPTO_CIPHER_3DES_ECB;
  68                 break;
  69         case VIRTIO_CRYPTO_CIPHER_3DES_CBC:
  70                 *algo = RTE_CRYPTO_CIPHER_3DES_CBC;
  71                 break;
  72         case VIRTIO_CRYPTO_CIPHER_3DES_CTR:
  73                 *algo = RTE_CRYPTO_CIPHER_3DES_CTR;
  74                 break;
  75         case VIRTIO_CRYPTO_CIPHER_KASUMI_F8:
  76                 *algo = RTE_CRYPTO_CIPHER_KASUMI_F8;
  77                 break;
  78         case VIRTIO_CRYPTO_CIPHER_SNOW3G_UEA2:
  79                 *algo = RTE_CRYPTO_CIPHER_SNOW3G_UEA2;
  80                 break;
  81         case VIRTIO_CRYPTO_CIPHER_AES_F8:
  82                 *algo = RTE_CRYPTO_CIPHER_AES_F8;
  83                 break;
  84         case VIRTIO_CRYPTO_CIPHER_AES_XTS:
  85                 *algo = RTE_CRYPTO_CIPHER_AES_XTS;
  86                 break;
  87         case VIRTIO_CRYPTO_CIPHER_ZUC_EEA3:
  88                 *algo = RTE_CRYPTO_CIPHER_ZUC_EEA3;
  89                 break;
  90         default:
  91                 return -VIRTIO_CRYPTO_BADMSG;
  92                 break;
  93         }
  94
  95         return 0;
  96 }
  97
  98 static int
  99 auth_algo_transform(uint32_t virtio_auth_algo,
 100                 enum rte_crypto_auth_algorithm *algo)
 101 {
 102         switch (virtio_auth_algo) {
 103         case VIRTIO_CRYPTO_NO_MAC:
 104                 *algo = RTE_CRYPTO_AUTH_NULL;
 105                 break;
 106         case VIRTIO_CRYPTO_MAC_HMAC_MD5:
 107                 *algo = RTE_CRYPTO_AUTH_MD5_HMAC;
 108                 break;
 109         case VIRTIO_CRYPTO_MAC_HMAC_SHA1:
 110                 *algo = RTE_CRYPTO_AUTH_SHA1_HMAC;
 111                 break;
 112         case VIRTIO_CRYPTO_MAC_HMAC_SHA_224:
 113                 *algo = RTE_CRYPTO_AUTH_SHA224_HMAC;
 114                 break;
 115         case VIRTIO_CRYPTO_MAC_HMAC_SHA_256:
 116                 *algo = RTE_CRYPTO_AUTH_SHA256_HMAC;
 117                 break;
 118         case VIRTIO_CRYPTO_MAC_HMAC_SHA_384:
 119                 *algo = RTE_CRYPTO_AUTH_SHA384_HMAC;
 120                 break;
 121         case VIRTIO_CRYPTO_MAC_HMAC_SHA_512:
 122                 *algo = RTE_CRYPTO_AUTH_SHA512_HMAC;
 123                 break;
 124         case VIRTIO_CRYPTO_MAC_CMAC_AES:
 125                 *algo = RTE_CRYPTO_AUTH_AES_CMAC;
 126                 break;
 127         case VIRTIO_CRYPTO_MAC_KASUMI_F9:
 128                 *algo = RTE_CRYPTO_AUTH_KASUMI_F9;
 129                 break;
 130         case VIRTIO_CRYPTO_MAC_SNOW3G_UIA2:
 131                 *algo = RTE_CRYPTO_AUTH_SNOW3G_UIA2;
 132                 break;
 133         case VIRTIO_CRYPTO_MAC_GMAC_AES:
 134                 *algo = RTE_CRYPTO_AUTH_AES_GMAC;
 135                 break;
 136         case VIRTIO_CRYPTO_MAC_CBCMAC_AES:
 137                 *algo = RTE_CRYPTO_AUTH_AES_CBC_MAC;
 138                 break;
 139         case VIRTIO_CRYPTO_MAC_XCBC_AES:
 140                 *algo = RTE_CRYPTO_AUTH_AES_XCBC_MAC;
 141                 break;
 142         case VIRTIO_CRYPTO_MAC_CMAC_3DES:
 143         case VIRTIO_CRYPTO_MAC_GMAC_TWOFISH:
 144         case VIRTIO_CRYPTO_MAC_CBCMAC_KASUMI_F9:
 145                 return -VIRTIO_CRYPTO_NOTSUPP;
 146         default:
 147                 return -VIRTIO_CRYPTO_BADMSG;
 148         }
 149
 150         return 0;
 151 }
 152
 153 static int get_iv_len(enum rte_crypto_cipher_algorithm algo)
 154 {
 155         int len;
 156
 157         switch (algo) {
 158         case RTE_CRYPTO_CIPHER_3DES_CBC:
 159                 len = 8;
 160                 break;
 161         case RTE_CRYPTO_CIPHER_3DES_CTR:
 162                 len = 8;
 163                 break;
 164         case RTE_CRYPTO_CIPHER_3DES_ECB:
 165                 len = 8;
 166                 break;
 167         case RTE_CRYPTO_CIPHER_AES_CBC:
 168                 len = 16;
 169                 break;
 170
 171         /* TODO: add common algos */
 172
 173         default:
 174                 len = -1;
 175                 break;
 176         }
 177
 178         return len;
 179 }
 180
 181 /**
 182  * vhost_crypto struct is used to maintain a number of virtio_cryptos and
 183  * one DPDK crypto device that deals with all crypto workloads. It is declared
 184  * here and defined in vhost_crypto.c
 185  */
 186 struct vhost_crypto {
 187         /** Used to lookup DPDK Cryptodev Session based on VIRTIO crypto
 188          *  session ID.
 189          */
 190         struct rte_hash *session_map;
 191         struct rte_mempool *mbuf_pool;
 192         struct rte_mempool *sess_pool;
 193         struct rte_mempool *sess_priv_pool;
 194         struct rte_mempool *wb_pool;
 195
 196         /** DPDK cryptodev ID */
 197         uint8_t cid;
 198         uint16_t nb_qps;
 199
 200         uint64_t last_session_id;
 201
 202         uint64_t cache_session_id;
 203         struct rte_cryptodev_sym_session *cache_session;
 204         /** socket id for the device */
 205         int socket_id;
 206
 207         struct virtio_net *dev;
 208
 209         uint8_t option;
 210 } __rte_cache_aligned;
 211
 212 struct vhost_crypto_writeback_data {
 213         uint8_t *src;
 214         uint8_t *dst;
 215         uint64_t len;
 216         struct vhost_crypto_writeback_data *next;
 217 };
 218
 219 struct vhost_crypto_data_req {
 220         struct vring_desc *head;
 221         struct virtio_net *dev;
 222         struct virtio_crypto_inhdr *inhdr;
 223         struct vhost_virtqueue *vq;
 224         struct vhost_crypto_writeback_data *wb;
 225         struct rte_mempool *wb_pool;
 226         uint16_t desc_idx;
 227         uint16_t len;
 228         uint16_t zero_copy;
 229 };
 230
 231 static int
 232 transform_cipher_param(struct rte_crypto_sym_xform *xform,
 233                 VhostUserCryptoSessionParam *param)
 234 {
 235         int ret;
 236
 237         ret = cipher_algo_transform(param->cipher_algo, &xform->cipher.algo);
 238         if (unlikely(ret < 0))
 239                 return ret;
 240
 241         if (param->cipher_key_len > VHOST_USER_CRYPTO_MAX_CIPHER_KEY_LENGTH) {
 242                 VC_LOG_DBG("Invalid cipher key length\n");
 243                 return -VIRTIO_CRYPTO_BADMSG;
 244         }
 245
 246         xform->type = RTE_CRYPTO_SYM_XFORM_CIPHER;
 247         xform->cipher.key.length = param->cipher_key_len;
 248         if (xform->cipher.key.length > 0)
 249                 xform->cipher.key.data = param->cipher_key_buf;
 250         if (param->dir == VIRTIO_CRYPTO_OP_ENCRYPT)
 251                 xform->cipher.op = RTE_CRYPTO_CIPHER_OP_ENCRYPT;
 252         else if (param->dir == VIRTIO_CRYPTO_OP_DECRYPT)
 253                 xform->cipher.op = RTE_CRYPTO_CIPHER_OP_DECRYPT;
 254         else {
 255                 VC_LOG_DBG("Bad operation type");
 256                 return -VIRTIO_CRYPTO_BADMSG;
 257         }
 258
 259         ret = get_iv_len(xform->cipher.algo);
 260         if (unlikely(ret < 0))
 261                 return ret;
 262         xform->cipher.iv.length = (uint16_t)ret;
 263         xform->cipher.iv.offset = IV_OFFSET;
 264         return 0;
 265 }
 266
 267 static int
 268 transform_chain_param(struct rte_crypto_sym_xform *xforms,
 269                 VhostUserCryptoSessionParam *param)
 270 {
 271         struct rte_crypto_sym_xform *xform_cipher, *xform_auth;
 272         int ret;
 273
 274         switch (param->chaining_dir) {
 275         case VIRTIO_CRYPTO_SYM_ALG_CHAIN_ORDER_HASH_THEN_CIPHER:
 276                 xform_auth = xforms;
 277                 xform_cipher = xforms->next;
 278                 xform_cipher->cipher.op = RTE_CRYPTO_CIPHER_OP_DECRYPT;
 279                 xform_auth->auth.op = RTE_CRYPTO_AUTH_OP_VERIFY;
 280                 break;
 281         case VIRTIO_CRYPTO_SYM_ALG_CHAIN_ORDER_CIPHER_THEN_HASH:
 282                 xform_cipher = xforms;
 283                 xform_auth = xforms->next;
 284                 xform_cipher->cipher.op = RTE_CRYPTO_CIPHER_OP_ENCRYPT;
 285                 xform_auth->auth.op = RTE_CRYPTO_AUTH_OP_GENERATE;
 286                 break;
 287         default:
 288                 return -VIRTIO_CRYPTO_BADMSG;
 289         }
 290
 291         /* cipher */
 292         ret = cipher_algo_transform(param->cipher_algo,
 293                         &xform_cipher->cipher.algo);
 294         if (unlikely(ret < 0))
 295                 return ret;
 296
 297         if (param->cipher_key_len > VHOST_USER_CRYPTO_MAX_CIPHER_KEY_LENGTH) {
 298                 VC_LOG_DBG("Invalid cipher key length\n");
 299                 return -VIRTIO_CRYPTO_BADMSG;
 300         }
 301
 302         xform_cipher->type = RTE_CRYPTO_SYM_XFORM_CIPHER;
 303         xform_cipher->cipher.key.length = param->cipher_key_len;
 304         xform_cipher->cipher.key.data = param->cipher_key_buf;
 305         ret = get_iv_len(xform_cipher->cipher.algo);
 306         if (unlikely(ret < 0))
 307                 return ret;
 308         xform_cipher->cipher.iv.length = (uint16_t)ret;
 309         xform_cipher->cipher.iv.offset = IV_OFFSET;
 310
 311         /* auth */
 312         xform_auth->type = RTE_CRYPTO_SYM_XFORM_AUTH;
 313         ret = auth_algo_transform(param->hash_algo, &xform_auth->auth.algo);
 314         if (unlikely(ret < 0))
 315                 return ret;
 316
 317         if (param->auth_key_len > VHOST_USER_CRYPTO_MAX_HMAC_KEY_LENGTH) {
 318                 VC_LOG_DBG("Invalid auth key length\n");
 319                 return -VIRTIO_CRYPTO_BADMSG;
 320         }
 321
 322         xform_auth->auth.digest_length = param->digest_len;
 323         xform_auth->auth.key.length = param->auth_key_len;
 324         xform_auth->auth.key.data = param->auth_key_buf;
 325
 326         return 0;
 327 }
 328
 329 static void
 330 vhost_crypto_create_sess(struct vhost_crypto *vcrypto,
 331                 VhostUserCryptoSessionParam *sess_param)
 332 {
 333         struct rte_crypto_sym_xform xform1 = {0}, xform2 = {0};
 334         struct rte_cryptodev_sym_session *session;
 335         int ret;
 336
 337         switch (sess_param->op_type) {
 338         case VIRTIO_CRYPTO_SYM_OP_NONE:
 339         case VIRTIO_CRYPTO_SYM_OP_CIPHER:
 340                 ret = transform_cipher_param(&xform1, sess_param);
 341                 if (unlikely(ret)) {
 342                         VC_LOG_ERR("Error transform session msg (%i)", ret);
 343                         sess_param->session_id = ret;
 344                         return;
 345                 }
 346                 break;
 347         case VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING:
 348                 if (unlikely(sess_param->hash_mode !=
 349                                 VIRTIO_CRYPTO_SYM_HASH_MODE_AUTH)) {
 350                         sess_param->session_id = -VIRTIO_CRYPTO_NOTSUPP;
 351                         VC_LOG_ERR("Error transform session message (%i)",
 352                                         -VIRTIO_CRYPTO_NOTSUPP);
 353                         return;
 354                 }
 355
 356                 xform1.next = &xform2;
 357
 358                 ret = transform_chain_param(&xform1, sess_param);
 359                 if (unlikely(ret)) {
 360                         VC_LOG_ERR("Error transform session message (%i)", ret);
 361                         sess_param->session_id = ret;
 362                         return;
 363                 }
 364
 365                 break;
 366         default:
 367                 VC_LOG_ERR("Algorithm not yet supported");
 368                 sess_param->session_id = -VIRTIO_CRYPTO_NOTSUPP;
 369                 return;
 370         }
 371
 372         session = rte_cryptodev_sym_session_create(vcrypto->sess_pool);
 373         if (!session) {
 374                 VC_LOG_ERR("Failed to create session");
 375                 sess_param->session_id = -VIRTIO_CRYPTO_ERR;
 376                 return;
 377         }
 378
 379         if (rte_cryptodev_sym_session_init(vcrypto->cid, session, &xform1,
 380                         vcrypto->sess_priv_pool) < 0) {
 381                 VC_LOG_ERR("Failed to initialize session");
 382                 sess_param->session_id = -VIRTIO_CRYPTO_ERR;
 383                 return;
 384         }
 385
 386         /* insert hash to map */
 387         if (rte_hash_add_key_data(vcrypto->session_map,
 388                         &vcrypto->last_session_id, session) < 0) {
 389                 VC_LOG_ERR("Failed to insert session to hash table");
 390
 391                 if (rte_cryptodev_sym_session_clear(vcrypto->cid, session) < 0)
 392                         VC_LOG_ERR("Failed to clear session");
 393                 else {
 394                         if (rte_cryptodev_sym_session_free(session) < 0)
 395                                 VC_LOG_ERR("Failed to free session");
 396                 }
 397                 sess_param->session_id = -VIRTIO_CRYPTO_ERR;
 398                 return;
 399         }
 400
 401         VC_LOG_INFO("Session %"PRIu64" created for vdev %i.",
 402                         vcrypto->last_session_id, vcrypto->dev->vid);
 403
 404         sess_param->session_id = vcrypto->last_session_id;
 405         vcrypto->last_session_id++;
 406 }
 407
 408 static int
 409 vhost_crypto_close_sess(struct vhost_crypto *vcrypto, uint64_t session_id)
 410 {
 411         struct rte_cryptodev_sym_session *session;
 412         uint64_t sess_id = session_id;
 413         int ret;
 414
 415         ret = rte_hash_lookup_data(vcrypto->session_map, &sess_id,
 416                         (void **)&session);
 417
 418         if (unlikely(ret < 0)) {
 419                 VC_LOG_ERR("Failed to delete session %"PRIu64".", session_id);
 420                 return -VIRTIO_CRYPTO_INVSESS;
 421         }
 422
 423         if (rte_cryptodev_sym_session_clear(vcrypto->cid, session) < 0) {
 424                 VC_LOG_DBG("Failed to clear session");
 425                 return -VIRTIO_CRYPTO_ERR;
 426         }
 427
 428         if (rte_cryptodev_sym_session_free(session) < 0) {
 429                 VC_LOG_DBG("Failed to free session");
 430                 return -VIRTIO_CRYPTO_ERR;
 431         }
 432
 433         if (rte_hash_del_key(vcrypto->session_map, &sess_id) < 0) {
 434                 VC_LOG_DBG("Failed to delete session from hash table.");
 435                 return -VIRTIO_CRYPTO_ERR;
 436         }
 437
 438         VC_LOG_INFO("Session %"PRIu64" deleted for vdev %i.", sess_id,
 439                         vcrypto->dev->vid);
 440
 441         return 0;
 442 }
 443
 444 static enum rte_vhost_msg_result
 445 vhost_crypto_msg_post_handler(int vid, void *msg)
 446 {
 447         struct virtio_net *dev = get_device(vid);
 448         struct vhost_crypto *vcrypto;
 449         VhostUserMsg *vmsg = msg;
 450         enum rte_vhost_msg_result ret = RTE_VHOST_MSG_RESULT_OK;
 451
 452         if (dev == NULL) {
 453                 VC_LOG_ERR("Invalid vid %i", vid);
 454                 return RTE_VHOST_MSG_RESULT_ERR;
 455         }
 456
 457         vcrypto = dev->extern_data;
 458         if (vcrypto == NULL) {
 459                 VC_LOG_ERR("Cannot find required data, is it initialized?");
 460                 return RTE_VHOST_MSG_RESULT_ERR;
 461         }
 462
 463         switch (vmsg->request.master) {
 464         case VHOST_USER_CRYPTO_CREATE_SESS:
 465                 vhost_crypto_create_sess(vcrypto,
 466                                 &vmsg->payload.crypto_session);
 467                 vmsg->fd_num = 0;
 468                 ret = RTE_VHOST_MSG_RESULT_REPLY;
 469                 break;
 470         case VHOST_USER_CRYPTO_CLOSE_SESS:
 471                 if (vhost_crypto_close_sess(vcrypto, vmsg->payload.u64))
 472                         ret = RTE_VHOST_MSG_RESULT_ERR;
 473                 break;
 474         default:
 475                 ret = RTE_VHOST_MSG_RESULT_NOT_HANDLED;
 476                 break;
 477         }
 478
 479         return ret;
 480 }
 481
 482 static __rte_always_inline struct vring_desc *
 483 find_write_desc(struct vring_desc *head, struct vring_desc *desc,
 484                 uint32_t *nb_descs, uint32_t vq_size)
 485 {
 486         if (desc->flags & VRING_DESC_F_WRITE)
 487                 return desc;
 488
 489         while (desc->flags & VRING_DESC_F_NEXT) {
 490                 if (unlikely(*nb_descs == 0 || desc->next >= vq_size))
 491                         return NULL;
 492                 (*nb_descs)--;
 493
 494                 desc = &head[desc->next];
 495                 if (desc->flags & VRING_DESC_F_WRITE)
 496                         return desc;
 497         }
 498
 499         return NULL;
 500 }
 501
 502 static struct virtio_crypto_inhdr *
 503 reach_inhdr(struct vhost_crypto_data_req *vc_req, struct vring_desc *desc,
 504                 uint32_t *nb_descs, uint32_t vq_size)
 505 {
 506         uint64_t dlen;
 507         struct virtio_crypto_inhdr *inhdr;
 508
 509         while (desc->flags & VRING_DESC_F_NEXT) {
 510                 if (unlikely(*nb_descs == 0 || desc->next >= vq_size))
 511                         return NULL;
 512                 (*nb_descs)--;
 513                 desc = &vc_req->head[desc->next];
 514         }
 515
 516         dlen = desc->len;
 517         inhdr = IOVA_TO_VVA(struct virtio_crypto_inhdr *, vc_req, desc->addr,
 518                         &dlen, VHOST_ACCESS_WO);
 519         if (unlikely(!inhdr || dlen != desc->len))
 520                 return NULL;
 521
 522         return inhdr;
 523 }
 524
 525 static __rte_always_inline int
 526 move_desc(struct vring_desc *head, struct vring_desc **cur_desc,
 527                 uint32_t size, uint32_t *nb_descs, uint32_t vq_size)
 528 {
 529         struct vring_desc *desc = *cur_desc;
 530         int left = size - desc->len;
 531
 532         while ((desc->flags & VRING_DESC_F_NEXT) && left > 0) {
 533                 (*nb_descs)--;
 534                 if (unlikely(*nb_descs == 0 || desc->next >= vq_size))
 535                         return -1;
 536
 537                 desc = &head[desc->next];
 538                 rte_prefetch0(&head[desc->next]);
 539                 left -= desc->len;
 540         }
 541
 542         if (unlikely(left > 0))
 543                 return -1;
 544
 545         if (unlikely(*nb_descs == 0))
 546                 *cur_desc = NULL;
 547         else {
 548                 if (unlikely(desc->next >= vq_size))
 549                         return -1;
 550                 *cur_desc = &head[desc->next];
 551         }
 552
 553         return 0;
 554 }
 555
 556 static __rte_always_inline void *
 557 get_data_ptr(struct vhost_crypto_data_req *vc_req, struct vring_desc *cur_desc,
 558                 uint8_t perm)
 559 {
 560         void *data;
 561         uint64_t dlen = cur_desc->len;
 562
 563         data = IOVA_TO_VVA(void *, vc_req, cur_desc->addr, &dlen, perm);
 564         if (unlikely(!data || dlen != cur_desc->len)) {
 565                 VC_LOG_ERR("Failed to map object");
 566                 return NULL;
 567         }
 568
 569         return data;
 570 }
 571
 572 static int
 573 copy_data(void *dst_data, struct vhost_crypto_data_req *vc_req,
 574                 struct vring_desc **cur_desc, uint32_t size,
 575                 uint32_t *nb_descs, uint32_t vq_size)
 576 {
 577         struct vring_desc *desc = *cur_desc;
 578         uint64_t remain, addr, dlen, len;
 579         uint32_t to_copy;
 580         uint8_t *data = dst_data;
 581         uint8_t *src;
 582         int left = size;
 583
 584         to_copy = RTE_MIN(desc->len, (uint32_t)left);
 585         dlen = to_copy;
 586         src = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr, &dlen,
 587                         VHOST_ACCESS_RO);
 588         if (unlikely(!src || !dlen))
 589                 return -1;
 590
 591         rte_memcpy((uint8_t *)data, src, dlen);
 592         data += dlen;
 593
 594         if (unlikely(dlen < to_copy)) {
 595                 remain = to_copy - dlen;
 596                 addr = desc->addr + dlen;
 597
 598                 while (remain) {
 599                         len = remain;
 600                         src = IOVA_TO_VVA(uint8_t *, vc_req, addr, &len,
 601                                         VHOST_ACCESS_RO);
 602                         if (unlikely(!src || !len)) {
 603                                 VC_LOG_ERR("Failed to map descriptor");
 604                                 return -1;
 605                         }
 606
 607                         rte_memcpy(data, src, len);
 608                         addr += len;
 609                         remain -= len;
 610                         data += len;
 611                 }
 612         }
 613
 614         left -= to_copy;
 615
 616         while ((desc->flags & VRING_DESC_F_NEXT) && left > 0) {
 617                 if (unlikely(*nb_descs == 0 || desc->next >= vq_size)) {
 618                         VC_LOG_ERR("Invalid descriptors");
 619                         return -1;
 620                 }
 621                 (*nb_descs)--;
 622
 623                 desc = &vc_req->head[desc->next];
 624                 rte_prefetch0(&vc_req->head[desc->next]);
 625                 to_copy = RTE_MIN(desc->len, (uint32_t)left);
 626                 dlen = desc->len;
 627                 src = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr, &dlen,
 628                                 VHOST_ACCESS_RO);
 629                 if (unlikely(!src || !dlen)) {
 630                         VC_LOG_ERR("Failed to map descriptor");
 631                         return -1;
 632                 }
 633
 634                 rte_memcpy(data, src, dlen);
 635                 data += dlen;
 636
 637                 if (unlikely(dlen < to_copy)) {
 638                         remain = to_copy - dlen;
 639                         addr = desc->addr + dlen;
 640
 641                         while (remain) {
 642                                 len = remain;
 643                                 src = IOVA_TO_VVA(uint8_t *, vc_req, addr, &len,
 644                                                 VHOST_ACCESS_RO);
 645                                 if (unlikely(!src || !len)) {
 646                                         VC_LOG_ERR("Failed to map descriptor");
 647                                         return -1;
 648                                 }
 649
 650                                 rte_memcpy(data, src, len);
 651                                 addr += len;
 652                                 remain -= len;
 653                                 data += len;
 654                         }
 655                 }
 656
 657                 left -= to_copy;
 658         }
 659
 660         if (unlikely(left > 0)) {
 661                 VC_LOG_ERR("Incorrect virtio descriptor");
 662                 return -1;
 663         }
 664
 665         if (unlikely(*nb_descs == 0))
 666                 *cur_desc = NULL;
 667         else {
 668                 if (unlikely(desc->next >= vq_size))
 669                         return -1;
 670                 *cur_desc = &vc_req->head[desc->next];
 671         }
 672
 673         return 0;
 674 }
 675
 676 static void
 677 write_back_data(struct vhost_crypto_data_req *vc_req)
 678 {
 679         struct vhost_crypto_writeback_data *wb_data = vc_req->wb, *wb_last;
 680
 681         while (wb_data) {
 682                 rte_memcpy(wb_data->dst, wb_data->src, wb_data->len);
 683                 wb_last = wb_data;
 684                 wb_data = wb_data->next;
 685                 rte_mempool_put(vc_req->wb_pool, wb_last);
 686         }
 687 }
 688
 689 static void
 690 free_wb_data(struct vhost_crypto_writeback_data *wb_data,
 691                 struct rte_mempool *mp)
 692 {
 693         while (wb_data->next != NULL)
 694                 free_wb_data(wb_data->next, mp);
 695
 696         rte_mempool_put(mp, wb_data);
 697 }
 698
 699 /**
 700  * The function will allocate a vhost_crypto_writeback_data linked list
 701  * containing the source and destination data pointers for the write back
 702  * operation after dequeued from Cryptodev PMD queues.
 703  *
 704  * @param vc_req
 705  *   The vhost crypto data request pointer
 706  * @param cur_desc
 707  *   The pointer of the current in use descriptor pointer. The content of
 708  *   cur_desc is expected to be updated after the function execution.
 709  * @param end_wb_data
 710  *   The last write back data element to be returned. It is used only in cipher
 711  *   and hash chain operations.
 712  * @param src
 713  *   The source data pointer
 714  * @param offset
 715  *   The offset to both source and destination data. For source data the offset
 716  *   is the number of bytes between src and start point of cipher operation. For
 717  *   destination data the offset is the number of bytes from *cur_desc->addr
 718  *   to the point where the src will be written to.
 719  * @param write_back_len
 720  *   The size of the write back length.
 721  * @return
 722  *   The pointer to the start of the write back data linked list.
 723  */
 724 static struct vhost_crypto_writeback_data *
 725 prepare_write_back_data(struct vhost_crypto_data_req *vc_req,
 726                 struct vring_desc **cur_desc,
 727                 struct vhost_crypto_writeback_data **end_wb_data,
 728                 uint8_t *src,
 729                 uint32_t offset,
 730                 uint64_t write_back_len,
 731                 uint32_t *nb_descs, uint32_t vq_size)
 732 {
 733         struct vhost_crypto_writeback_data *wb_data, *head;
 734         struct vring_desc *desc = *cur_desc;
 735         uint64_t dlen;
 736         uint8_t *dst;
 737         int ret;
 738
 739         ret = rte_mempool_get(vc_req->wb_pool, (void **)&head);
 740         if (unlikely(ret < 0)) {
 741                 VC_LOG_ERR("no memory");
 742                 goto error_exit;
 743         }
 744
 745         wb_data = head;
 746
 747         if (likely(desc->len > offset)) {
 748                 wb_data->src = src + offset;
 749                 dlen = desc->len;
 750                 dst = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr,
 751                         &dlen, VHOST_ACCESS_RW) + offset;
 752                 if (unlikely(!dst || dlen != desc->len)) {
 753                         VC_LOG_ERR("Failed to map descriptor");
 754                         goto error_exit;
 755                 }
 756
 757                 wb_data->dst = dst;
 758                 wb_data->len = desc->len - offset;
 759                 write_back_len -= wb_data->len;
 760                 src += offset + wb_data->len;
 761                 offset = 0;
 762
 763                 if (unlikely(write_back_len)) {
 764                         ret = rte_mempool_get(vc_req->wb_pool,
 765                                         (void **)&(wb_data->next));
 766                         if (unlikely(ret < 0)) {
 767                                 VC_LOG_ERR("no memory");
 768                                 goto error_exit;
 769                         }
 770
 771                         wb_data = wb_data->next;
 772                 } else
 773                         wb_data->next = NULL;
 774         } else
 775                 offset -= desc->len;
 776
 777         while (write_back_len) {
 778                 if (unlikely(*nb_descs == 0 || desc->next >= vq_size)) {
 779                         VC_LOG_ERR("Invalid descriptors");
 780                         goto error_exit;
 781                 }
 782                 (*nb_descs)--;
 783
 784                 desc = &vc_req->head[desc->next];
 785                 if (unlikely(!(desc->flags & VRING_DESC_F_WRITE))) {
 786                         VC_LOG_ERR("incorrect descriptor");
 787                         goto error_exit;
 788                 }
 789
 790                 if (desc->len <= offset) {
 791                         offset -= desc->len;
 792                         continue;
 793                 }
 794
 795                 dlen = desc->len;
 796                 dst = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr, &dlen,
 797                                 VHOST_ACCESS_RW) + offset;
 798                 if (unlikely(dst == NULL || dlen != desc->len)) {
 799                         VC_LOG_ERR("Failed to map descriptor");
 800                         goto error_exit;
 801                 }
 802
 803                 wb_data->src = src;
 804                 wb_data->dst = dst;
 805                 wb_data->len = RTE_MIN(desc->len - offset, write_back_len);
 806                 write_back_len -= wb_data->len;
 807                 src += wb_data->len;
 808                 offset = 0;
 809
 810                 if (write_back_len) {
 811                         ret = rte_mempool_get(vc_req->wb_pool,
 812                                         (void **)&(wb_data->next));
 813                         if (unlikely(ret < 0)) {
 814                                 VC_LOG_ERR("no memory");
 815                                 goto error_exit;
 816                         }
 817
 818                         wb_data = wb_data->next;
 819                 } else
 820                         wb_data->next = NULL;
 821         }
 822
 823         if (unlikely(*nb_descs == 0))
 824                 *cur_desc = NULL;
 825         else {
 826                 if (unlikely(desc->next >= vq_size))
 827                         goto error_exit;
 828                 *cur_desc = &vc_req->head[desc->next];
 829         }
 830
 831         *end_wb_data = wb_data;
 832
 833         return head;
 834
 835 error_exit:
 836         if (head)
 837                 free_wb_data(head, vc_req->wb_pool);
 838
 839         return NULL;
 840 }
 841
 842 static uint8_t
 843 prepare_sym_cipher_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op,
 844                 struct vhost_crypto_data_req *vc_req,
 845                 struct virtio_crypto_cipher_data_req *cipher,
 846                 struct vring_desc *cur_desc,
 847                 uint32_t *nb_descs, uint32_t vq_size)
 848 {
 849         struct vring_desc *desc = cur_desc;
 850         struct vhost_crypto_writeback_data *ewb = NULL;
 851         struct rte_mbuf *m_src = op->sym->m_src, *m_dst = op->sym->m_dst;
 852         uint8_t *iv_data = rte_crypto_op_ctod_offset(op, uint8_t *, IV_OFFSET);
 853         uint8_t ret = 0;
 854
 855         /* prepare */
 856         /* iv */
 857         if (unlikely(copy_data(iv_data, vc_req, &desc, cipher->para.iv_len,
 858                         nb_descs, vq_size) < 0)) {
 859                 ret = VIRTIO_CRYPTO_BADMSG;
 860                 goto error_exit;
 861         }
 862
 863         m_src->data_len = cipher->para.src_data_len;
 864
 865         switch (vcrypto->option) {
 866         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
 867                 m_src->buf_iova = gpa_to_hpa(vcrypto->dev, desc->addr,
 868                                 cipher->para.src_data_len);
 869                 m_src->buf_addr = get_data_ptr(vc_req, desc, VHOST_ACCESS_RO);
 870                 if (unlikely(m_src->buf_iova == 0 ||
 871                                 m_src->buf_addr == NULL)) {
 872                         VC_LOG_ERR("zero_copy may fail due to cross page data");
 873                         ret = VIRTIO_CRYPTO_ERR;
 874                         goto error_exit;
 875                 }
 876
 877                 if (unlikely(move_desc(vc_req->head, &desc,
 878                                 cipher->para.src_data_len, nb_descs,
 879                                 vq_size) < 0)) {
 880                         VC_LOG_ERR("Incorrect descriptor");
 881                         ret = VIRTIO_CRYPTO_ERR;
 882                         goto error_exit;
 883                 }
 884
 885                 break;
 886         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
 887                 vc_req->wb_pool = vcrypto->wb_pool;
 888
 889                 if (unlikely(cipher->para.src_data_len >
 890                                 RTE_MBUF_DEFAULT_BUF_SIZE)) {
 891                         VC_LOG_ERR("Not enough space to do data copy");
 892                         ret = VIRTIO_CRYPTO_ERR;
 893                         goto error_exit;
 894                 }
 895                 if (unlikely(copy_data(rte_pktmbuf_mtod(m_src, uint8_t *),
 896                                 vc_req, &desc, cipher->para.src_data_len,
 897                                 nb_descs, vq_size) < 0)) {
 898                         ret = VIRTIO_CRYPTO_BADMSG;
 899                         goto error_exit;
 900                 }
 901                 break;
 902         default:
 903                 ret = VIRTIO_CRYPTO_BADMSG;
 904                 goto error_exit;
 905         }
 906
 907         /* dst */
 908         desc = find_write_desc(vc_req->head, desc, nb_descs, vq_size);
 909         if (unlikely(!desc)) {
 910                 VC_LOG_ERR("Cannot find write location");
 911                 ret = VIRTIO_CRYPTO_BADMSG;
 912                 goto error_exit;
 913         }
 914
 915         switch (vcrypto->option) {
 916         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
 917                 m_dst->buf_iova = gpa_to_hpa(vcrypto->dev,
 918                                 desc->addr, cipher->para.dst_data_len);
 919                 m_dst->buf_addr = get_data_ptr(vc_req, desc, VHOST_ACCESS_RW);
 920                 if (unlikely(m_dst->buf_iova == 0 || m_dst->buf_addr == NULL)) {
 921                         VC_LOG_ERR("zero_copy may fail due to cross page data");
 922                         ret = VIRTIO_CRYPTO_ERR;
 923                         goto error_exit;
 924                 }
 925
 926                 if (unlikely(move_desc(vc_req->head, &desc,
 927                                 cipher->para.dst_data_len,
 928                                 nb_descs, vq_size) < 0)) {
 929                         VC_LOG_ERR("Incorrect descriptor");
 930                         ret = VIRTIO_CRYPTO_ERR;
 931                         goto error_exit;
 932                 }
 933
 934                 m_dst->data_len = cipher->para.dst_data_len;
 935                 break;
 936         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
 937                 vc_req->wb = prepare_write_back_data(vc_req, &desc, &ewb,
 938                                 rte_pktmbuf_mtod(m_src, uint8_t *), 0,
 939                                 cipher->para.dst_data_len, nb_descs, vq_size);
 940                 if (unlikely(vc_req->wb == NULL)) {
 941                         ret = VIRTIO_CRYPTO_ERR;
 942                         goto error_exit;
 943                 }
 944
 945                 break;
 946         default:
 947                 ret = VIRTIO_CRYPTO_BADMSG;
 948                 goto error_exit;
 949         }
 950
 951         /* src data */
 952         op->type = RTE_CRYPTO_OP_TYPE_SYMMETRIC;
 953         op->sess_type = RTE_CRYPTO_OP_WITH_SESSION;
 954
 955         op->sym->cipher.data.offset = 0;
 956         op->sym->cipher.data.length = cipher->para.src_data_len;
 957
 958         vc_req->inhdr = get_data_ptr(vc_req, desc, VHOST_ACCESS_WO);
 959         if (unlikely(vc_req->inhdr == NULL)) {
 960                 ret = VIRTIO_CRYPTO_BADMSG;
 961                 goto error_exit;
 962         }
 963
 964         vc_req->inhdr->status = VIRTIO_CRYPTO_OK;
 965         vc_req->len = cipher->para.dst_data_len + INHDR_LEN;
 966
 967         return 0;
 968
 969 error_exit:
 970         if (vc_req->wb)
 971                 free_wb_data(vc_req->wb, vc_req->wb_pool);
 972
 973         vc_req->len = INHDR_LEN;
 974         return ret;
 975 }
 976
 977 static uint8_t
 978 prepare_sym_chain_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op,
 979                 struct vhost_crypto_data_req *vc_req,
 980                 struct virtio_crypto_alg_chain_data_req *chain,
 981                 struct vring_desc *cur_desc,
 982                 uint32_t *nb_descs, uint32_t vq_size)
 983 {
 984         struct vring_desc *desc = cur_desc, *digest_desc;
 985         struct vhost_crypto_writeback_data *ewb = NULL, *ewb2 = NULL;
 986         struct rte_mbuf *m_src = op->sym->m_src, *m_dst = op->sym->m_dst;
 987         uint8_t *iv_data = rte_crypto_op_ctod_offset(op, uint8_t *, IV_OFFSET);
 988         uint32_t digest_offset;
 989         void *digest_addr;
 990         uint8_t ret = 0;
 991
 992         /* prepare */
 993         /* iv */
 994         if (unlikely(copy_data(iv_data, vc_req, &desc,
 995                         chain->para.iv_len, nb_descs, vq_size) < 0)) {
 996                 ret = VIRTIO_CRYPTO_BADMSG;
 997                 goto error_exit;
 998         }
 999
1000         m_src->data_len = chain->para.src_data_len;
1001
1002         switch (vcrypto->option) {
1003         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
1004                 m_dst->data_len = chain->para.dst_data_len;
1005
1006                 m_src->buf_iova = gpa_to_hpa(vcrypto->dev, desc->addr,
1007                                 chain->para.src_data_len);
1008                 m_src->buf_addr = get_data_ptr(vc_req, desc, VHOST_ACCESS_RO);
1009                 if (unlikely(m_src->buf_iova == 0 || m_src->buf_addr == NULL)) {
1010                         VC_LOG_ERR("zero_copy may fail due to cross page data");
1011                         ret = VIRTIO_CRYPTO_ERR;
1012                         goto error_exit;
1013                 }
1014
1015                 if (unlikely(move_desc(vc_req->head, &desc,
1016                                 chain->para.src_data_len,
1017                                 nb_descs, vq_size) < 0)) {
1018                         VC_LOG_ERR("Incorrect descriptor");
1019                         ret = VIRTIO_CRYPTO_ERR;
1020                         goto error_exit;
1021                 }
1022                 break;
1023         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
1024                 vc_req->wb_pool = vcrypto->wb_pool;
1025
1026                 if (unlikely(chain->para.src_data_len >
1027                                 RTE_MBUF_DEFAULT_BUF_SIZE)) {
1028                         VC_LOG_ERR("Not enough space to do data copy");
1029                         ret = VIRTIO_CRYPTO_ERR;
1030                         goto error_exit;
1031                 }
1032                 if (unlikely(copy_data(rte_pktmbuf_mtod(m_src, uint8_t *),
1033                                 vc_req, &desc, chain->para.src_data_len,
1034                                 nb_descs, vq_size) < 0)) {
1035                         ret = VIRTIO_CRYPTO_BADMSG;
1036                         goto error_exit;
1037                 }
1038
1039                 break;
1040         default:
1041                 ret = VIRTIO_CRYPTO_BADMSG;
1042                 goto error_exit;
1043         }
1044
1045         /* dst */
1046         desc = find_write_desc(vc_req->head, desc, nb_descs, vq_size);
1047         if (unlikely(!desc)) {
1048                 VC_LOG_ERR("Cannot find write location");
1049                 ret = VIRTIO_CRYPTO_BADMSG;
1050                 goto error_exit;
1051         }
1052
1053         switch (vcrypto->option) {
1054         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
1055                 m_dst->buf_iova = gpa_to_hpa(vcrypto->dev,
1056                                 desc->addr, chain->para.dst_data_len);
1057                 m_dst->buf_addr = get_data_ptr(vc_req, desc, VHOST_ACCESS_RW);
1058                 if (unlikely(m_dst->buf_iova == 0 || m_dst->buf_addr == NULL)) {
1059                         VC_LOG_ERR("zero_copy may fail due to cross page data");
1060                         ret = VIRTIO_CRYPTO_ERR;
1061                         goto error_exit;
1062                 }
1063
1064                 if (unlikely(move_desc(vc_req->head, &desc,
1065                                 chain->para.dst_data_len,
1066                                 nb_descs, vq_size) < 0)) {
1067                         VC_LOG_ERR("Incorrect descriptor");
1068                         ret = VIRTIO_CRYPTO_ERR;
1069                         goto error_exit;
1070                 }
1071
1072                 op->sym->auth.digest.phys_addr = gpa_to_hpa(vcrypto->dev,
1073                                 desc->addr, chain->para.hash_result_len);
1074                 op->sym->auth.digest.data = get_data_ptr(vc_req, desc,
1075                                 VHOST_ACCESS_RW);
1076                 if (unlikely(op->sym->auth.digest.phys_addr == 0)) {
1077                         VC_LOG_ERR("zero_copy may fail due to cross page data");
1078                         ret = VIRTIO_CRYPTO_ERR;
1079                         goto error_exit;
1080                 }
1081
1082                 if (unlikely(move_desc(vc_req->head, &desc,
1083                                 chain->para.hash_result_len,
1084                                 nb_descs, vq_size) < 0)) {
1085                         VC_LOG_ERR("Incorrect descriptor");
1086                         ret = VIRTIO_CRYPTO_ERR;
1087                         goto error_exit;
1088                 }
1089
1090                 break;
1091         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
1092                 vc_req->wb = prepare_write_back_data(vc_req, &desc, &ewb,
1093                                 rte_pktmbuf_mtod(m_src, uint8_t *),
1094                                 chain->para.cipher_start_src_offset,
1095                                 chain->para.dst_data_len -
1096                                 chain->para.cipher_start_src_offset,
1097                                 nb_descs, vq_size);
1098                 if (unlikely(vc_req->wb == NULL)) {
1099                         ret = VIRTIO_CRYPTO_ERR;
1100                         goto error_exit;
1101                 }
1102
1103                 digest_offset = m_src->data_len;
1104                 digest_addr = rte_pktmbuf_mtod_offset(m_src, void *,
1105                                 digest_offset);
1106                 digest_desc = desc;
1107
1108                 /** create a wb_data for digest */
1109                 ewb->next = prepare_write_back_data(vc_req, &desc, &ewb2,
1110                                 digest_addr, 0, chain->para.hash_result_len,
1111                                 nb_descs, vq_size);
1112                 if (unlikely(ewb->next == NULL)) {
1113                         ret = VIRTIO_CRYPTO_ERR;
1114                         goto error_exit;
1115                 }
1116
1117                 if (unlikely(copy_data(digest_addr, vc_req, &digest_desc,
1118                                 chain->para.hash_result_len,
1119                                 nb_descs, vq_size) < 0)) {
1120                         ret = VIRTIO_CRYPTO_BADMSG;
1121                         goto error_exit;
1122                 }
1123
1124                 op->sym->auth.digest.data = digest_addr;
1125                 op->sym->auth.digest.phys_addr = rte_pktmbuf_iova_offset(m_src,
1126                                 digest_offset);
1127                 break;
1128         default:
1129                 ret = VIRTIO_CRYPTO_BADMSG;
1130                 goto error_exit;
1131         }
1132
1133         /* record inhdr */
1134         vc_req->inhdr = get_data_ptr(vc_req, desc, VHOST_ACCESS_WO);
1135         if (unlikely(vc_req->inhdr == NULL)) {
1136                 ret = VIRTIO_CRYPTO_BADMSG;
1137                 goto error_exit;
1138         }
1139
1140         vc_req->inhdr->status = VIRTIO_CRYPTO_OK;
1141
1142         op->type = RTE_CRYPTO_OP_TYPE_SYMMETRIC;
1143         op->sess_type = RTE_CRYPTO_OP_WITH_SESSION;
1144
1145         op->sym->cipher.data.offset = chain->para.cipher_start_src_offset;
1146         op->sym->cipher.data.length = chain->para.src_data_len -
1147                         chain->para.cipher_start_src_offset;
1148
1149         op->sym->auth.data.offset = chain->para.hash_start_src_offset;
1150         op->sym->auth.data.length = chain->para.len_to_hash;
1151
1152         vc_req->len = chain->para.dst_data_len + chain->para.hash_result_len +
1153                         INHDR_LEN;
1154         return 0;
1155
1156 error_exit:
1157         if (vc_req->wb)
1158                 free_wb_data(vc_req->wb, vc_req->wb_pool);
1159         vc_req->len = INHDR_LEN;
1160         return ret;
1161 }
1162
1163 /**
1164  * Process on descriptor
1165  */
1166 static __rte_always_inline int
1167 vhost_crypto_process_one_req(struct vhost_crypto *vcrypto,
1168                 struct vhost_virtqueue *vq, struct rte_crypto_op *op,
1169                 struct vring_desc *head, uint16_t desc_idx)
1170 {
1171         struct vhost_crypto_data_req *vc_req = rte_mbuf_to_priv(op->sym->m_src);
1172         struct rte_cryptodev_sym_session *session;
1173         struct virtio_crypto_op_data_req *req, tmp_req;
1174         struct virtio_crypto_inhdr *inhdr;
1175         struct vring_desc *desc = NULL;
1176         uint64_t session_id;
1177         uint64_t dlen;
1178         uint32_t nb_descs = vq->size;
1179         int err = 0;
1180
1181         vc_req->desc_idx = desc_idx;
1182         vc_req->dev = vcrypto->dev;
1183         vc_req->vq = vq;
1184
1185         if (likely(head->flags & VRING_DESC_F_INDIRECT)) {
1186                 dlen = head->len;
1187                 nb_descs = dlen / sizeof(struct vring_desc);
1188                 /* drop invalid descriptors */
1189                 if (unlikely(nb_descs > vq->size))
1190                         return -1;
1191                 desc = IOVA_TO_VVA(struct vring_desc *, vc_req, head->addr,
1192                                 &dlen, VHOST_ACCESS_RO);
1193                 if (unlikely(!desc || dlen != head->len))
1194                         return -1;
1195                 desc_idx = 0;
1196                 head = desc;
1197         } else {
1198                 desc = head;
1199         }
1200
1201         vc_req->head = head;
1202         vc_req->zero_copy = vcrypto->option;
1203
1204         req = get_data_ptr(vc_req, desc, VHOST_ACCESS_RO);
1205         if (unlikely(req == NULL)) {
1206                 switch (vcrypto->option) {
1207                 case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
1208                         err = VIRTIO_CRYPTO_BADMSG;
1209                         VC_LOG_ERR("Invalid descriptor");
1210                         goto error_exit;
1211                 case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
1212                         req = &tmp_req;
1213                         if (unlikely(copy_data(req, vc_req, &desc, sizeof(*req),
1214                                         &nb_descs, vq->size) < 0)) {
1215                                 err = VIRTIO_CRYPTO_BADMSG;
1216                                 VC_LOG_ERR("Invalid descriptor");
1217                                 goto error_exit;
1218                         }
1219                         break;
1220                 default:
1221                         err = VIRTIO_CRYPTO_ERR;
1222                         VC_LOG_ERR("Invalid option");
1223                         goto error_exit;
1224                 }
1225         } else {
1226                 if (unlikely(move_desc(vc_req->head, &desc,
1227                                 sizeof(*req), &nb_descs, vq->size) < 0)) {
1228                         VC_LOG_ERR("Incorrect descriptor");
1229                         goto error_exit;
1230                 }
1231         }
1232
1233         switch (req->header.opcode) {
1234         case VIRTIO_CRYPTO_CIPHER_ENCRYPT:
1235         case VIRTIO_CRYPTO_CIPHER_DECRYPT:
1236                 session_id = req->header.session_id;
1237
1238                 /* one branch to avoid unnecessary table lookup */
1239                 if (vcrypto->cache_session_id != session_id) {
1240                         err = rte_hash_lookup_data(vcrypto->session_map,
1241                                         &session_id, (void **)&session);
1242                         if (unlikely(err < 0)) {
1243                                 err = VIRTIO_CRYPTO_ERR;
1244                                 VC_LOG_ERR("Failed to find session %"PRIu64,
1245                                                 session_id);
1246                                 goto error_exit;
1247                         }
1248
1249                         vcrypto->cache_session = session;
1250                         vcrypto->cache_session_id = session_id;
1251                 }
1252
1253                 session = vcrypto->cache_session;
1254
1255                 err = rte_crypto_op_attach_sym_session(op, session);
1256                 if (unlikely(err < 0)) {
1257                         err = VIRTIO_CRYPTO_ERR;
1258                         VC_LOG_ERR("Failed to attach session to op");
1259                         goto error_exit;
1260                 }
1261
1262                 switch (req->u.sym_req.op_type) {
1263                 case VIRTIO_CRYPTO_SYM_OP_NONE:
1264                         err = VIRTIO_CRYPTO_NOTSUPP;
1265                         break;
1266                 case VIRTIO_CRYPTO_SYM_OP_CIPHER:
1267                         err = prepare_sym_cipher_op(vcrypto, op, vc_req,
1268                                         &req->u.sym_req.u.cipher, desc,
1269                                         &nb_descs, vq->size);
1270                         break;
1271                 case VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING:
1272                         err = prepare_sym_chain_op(vcrypto, op, vc_req,
1273                                         &req->u.sym_req.u.chain, desc,
1274                                         &nb_descs, vq->size);
1275                         break;
1276                 }
1277                 if (unlikely(err != 0)) {
1278                         VC_LOG_ERR("Failed to process sym request");
1279                         goto error_exit;
1280                 }
1281                 break;
1282         default:
1283                 VC_LOG_ERR("Unsupported symmetric crypto request type %u",
1284                                 req->header.opcode);
1285                 goto error_exit;
1286         }
1287
1288         return 0;
1289
1290 error_exit:
1291
1292         inhdr = reach_inhdr(vc_req, desc, &nb_descs, vq->size);
1293         if (likely(inhdr != NULL))
1294                 inhdr->status = (uint8_t)err;
1295
1296         return -1;
1297 }
1298
1299 static __rte_always_inline struct vhost_virtqueue *
1300 vhost_crypto_finalize_one_request(struct rte_crypto_op *op,
1301                 struct vhost_virtqueue *old_vq)
1302 {
1303         struct rte_mbuf *m_src = op->sym->m_src;
1304         struct rte_mbuf *m_dst = op->sym->m_dst;
1305         struct vhost_crypto_data_req *vc_req = rte_mbuf_to_priv(m_src);
1306         uint16_t desc_idx;
1307
1308         if (unlikely(!vc_req)) {
1309                 VC_LOG_ERR("Failed to retrieve vc_req");
1310                 return NULL;
1311         }
1312
1313         if (old_vq && (vc_req->vq != old_vq))
1314                 return vc_req->vq;
1315
1316         desc_idx = vc_req->desc_idx;
1317
1318         if (unlikely(op->status != RTE_CRYPTO_OP_STATUS_SUCCESS))
1319                 vc_req->inhdr->status = VIRTIO_CRYPTO_ERR;
1320         else {
1321                 if (vc_req->zero_copy == 0)
1322                         write_back_data(vc_req);
1323         }
1324
1325         vc_req->vq->used->ring[desc_idx].id = desc_idx;
1326         vc_req->vq->used->ring[desc_idx].len = vc_req->len;
1327
1328         rte_mempool_put(m_src->pool, (void *)m_src);
1329
1330         if (m_dst)
1331                 rte_mempool_put(m_dst->pool, (void *)m_dst);
1332
1333         return vc_req->vq;
1334 }
1335
1336 static __rte_always_inline uint16_t
1337 vhost_crypto_complete_one_vm_requests(struct rte_crypto_op **ops,
1338                 uint16_t nb_ops, int *callfd)
1339 {
1340         uint16_t processed = 1;
1341         struct vhost_virtqueue *vq, *tmp_vq;
1342
1343         if (unlikely(nb_ops == 0))
1344                 return 0;
1345
1346         vq = vhost_crypto_finalize_one_request(ops[0], NULL);
1347         if (unlikely(vq == NULL))
1348                 return 0;
1349         tmp_vq = vq;
1350
1351         while ((processed < nb_ops)) {
1352                 tmp_vq = vhost_crypto_finalize_one_request(ops[processed],
1353                                 tmp_vq);
1354
1355                 if (unlikely(vq != tmp_vq))
1356                         break;
1357
1358                 processed++;
1359         }
1360
1361         *callfd = vq->callfd;
1362
1363         *(volatile uint16_t *)&vq->used->idx += processed;
1364
1365         return processed;
1366 }
1367
1368 int
1369 rte_vhost_crypto_create(int vid, uint8_t cryptodev_id,
1370                 struct rte_mempool *sess_pool,
1371                 struct rte_mempool *sess_priv_pool,
1372                 int socket_id)
1373 {
1374         struct virtio_net *dev = get_device(vid);
1375         struct rte_hash_parameters params = {0};
1376         struct vhost_crypto *vcrypto;
1377         char name[128];
1378         int ret;
1379
1380         if (!dev) {
1381                 VC_LOG_ERR("Invalid vid %i", vid);
1382                 return -EINVAL;
1383         }
1384
1385         ret = rte_vhost_driver_set_features(dev->ifname,
1386                         VIRTIO_CRYPTO_FEATURES);
1387         if (ret < 0) {
1388                 VC_LOG_ERR("Error setting features");
1389                 return -1;
1390         }
1391
1392         vcrypto = rte_zmalloc_socket(NULL, sizeof(*vcrypto),
1393                         RTE_CACHE_LINE_SIZE, socket_id);
1394         if (!vcrypto) {
1395                 VC_LOG_ERR("Insufficient memory");
1396                 return -ENOMEM;
1397         }
1398
1399         vcrypto->sess_pool = sess_pool;
1400         vcrypto->sess_priv_pool = sess_priv_pool;
1401         vcrypto->cid = cryptodev_id;
1402         vcrypto->cache_session_id = UINT64_MAX;
1403         vcrypto->last_session_id = 1;
1404         vcrypto->dev = dev;
1405         vcrypto->option = RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE;
1406
1407         snprintf(name, 127, "HASH_VHOST_CRYPT_%u", (uint32_t)vid);
1408         params.name = name;
1409         params.entries = VHOST_CRYPTO_SESSION_MAP_ENTRIES;
1410         params.hash_func = rte_jhash;
1411         params.key_len = sizeof(uint64_t);
1412         params.socket_id = socket_id;
1413         vcrypto->session_map = rte_hash_create(&params);
1414         if (!vcrypto->session_map) {
1415                 VC_LOG_ERR("Failed to creath session map");
1416                 ret = -ENOMEM;
1417                 goto error_exit;
1418         }
1419
1420         snprintf(name, 127, "MBUF_POOL_VM_%u", (uint32_t)vid);
1421         vcrypto->mbuf_pool = rte_pktmbuf_pool_create(name,
1422                         VHOST_CRYPTO_MBUF_POOL_SIZE, 512,
1423                         sizeof(struct vhost_crypto_data_req),
1424                         RTE_MBUF_DEFAULT_DATAROOM * 2 + RTE_PKTMBUF_HEADROOM,
1425                         rte_socket_id());
1426         if (!vcrypto->mbuf_pool) {
1427                 VC_LOG_ERR("Failed to creath mbuf pool");
1428                 ret = -ENOMEM;
1429                 goto error_exit;
1430         }
1431
1432         snprintf(name, 127, "WB_POOL_VM_%u", (uint32_t)vid);
1433         vcrypto->wb_pool = rte_mempool_create(name,
1434                         VHOST_CRYPTO_MBUF_POOL_SIZE,
1435                         sizeof(struct vhost_crypto_writeback_data),
1436                         128, 0, NULL, NULL, NULL, NULL,
1437                         rte_socket_id(), 0);
1438         if (!vcrypto->wb_pool) {
1439                 VC_LOG_ERR("Failed to creath mempool");
1440                 ret = -ENOMEM;
1441                 goto error_exit;
1442         }
1443
1444         dev->extern_data = vcrypto;
1445         dev->extern_ops.pre_msg_handle = NULL;
1446         dev->extern_ops.post_msg_handle = vhost_crypto_msg_post_handler;
1447
1448         return 0;
1449
1450 error_exit:
1451         if (vcrypto->session_map)
1452                 rte_hash_free(vcrypto->session_map);
1453         if (vcrypto->mbuf_pool)
1454                 rte_mempool_free(vcrypto->mbuf_pool);
1455
1456         rte_free(vcrypto);
1457
1458         return ret;
1459 }
1460
1461 int
1462 rte_vhost_crypto_free(int vid)
1463 {
1464         struct virtio_net *dev = get_device(vid);
1465         struct vhost_crypto *vcrypto;
1466
1467         if (unlikely(dev == NULL)) {
1468                 VC_LOG_ERR("Invalid vid %i", vid);
1469                 return -EINVAL;
1470         }
1471
1472         vcrypto = dev->extern_data;
1473         if (unlikely(vcrypto == NULL)) {
1474                 VC_LOG_ERR("Cannot find required data, is it initialized?");
1475                 return -ENOENT;
1476         }
1477
1478         rte_hash_free(vcrypto->session_map);
1479         rte_mempool_free(vcrypto->mbuf_pool);
1480         rte_mempool_free(vcrypto->wb_pool);
1481         rte_free(vcrypto);
1482
1483         dev->extern_data = NULL;
1484         dev->extern_ops.pre_msg_handle = NULL;
1485         dev->extern_ops.post_msg_handle = NULL;
1486
1487         return 0;
1488 }
1489
1490 int
1491 rte_vhost_crypto_set_zero_copy(int vid, enum rte_vhost_crypto_zero_copy option)
1492 {
1493         struct virtio_net *dev = get_device(vid);
1494         struct vhost_crypto *vcrypto;
1495
1496         if (unlikely(dev == NULL)) {
1497                 VC_LOG_ERR("Invalid vid %i", vid);
1498                 return -EINVAL;
1499         }
1500
1501         if (unlikely((uint32_t)option >=
1502                                 RTE_VHOST_CRYPTO_MAX_ZERO_COPY_OPTIONS)) {
1503                 VC_LOG_ERR("Invalid option %i", option);
1504                 return -EINVAL;
1505         }
1506
1507         vcrypto = (struct vhost_crypto *)dev->extern_data;
1508         if (unlikely(vcrypto == NULL)) {
1509                 VC_LOG_ERR("Cannot find required data, is it initialized?");
1510                 return -ENOENT;
1511         }
1512
1513         if (vcrypto->option == (uint8_t)option)
1514                 return 0;
1515
1516         if (!(rte_mempool_full(vcrypto->mbuf_pool)) ||
1517                         !(rte_mempool_full(vcrypto->wb_pool))) {
1518                 VC_LOG_ERR("Cannot update zero copy as mempool is not full");
1519                 return -EINVAL;
1520         }
1521
1522         if (option == RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE) {
1523                 char name[128];
1524
1525                 snprintf(name, 127, "WB_POOL_VM_%u", (uint32_t)vid);
1526                 vcrypto->wb_pool = rte_mempool_create(name,
1527                                 VHOST_CRYPTO_MBUF_POOL_SIZE,
1528                                 sizeof(struct vhost_crypto_writeback_data),
1529                                 128, 0, NULL, NULL, NULL, NULL,
1530                                 rte_socket_id(), 0);
1531                 if (!vcrypto->wb_pool) {
1532                         VC_LOG_ERR("Failed to creath mbuf pool");
1533                         return -ENOMEM;
1534                 }
1535         } else {
1536                 rte_mempool_free(vcrypto->wb_pool);
1537                 vcrypto->wb_pool = NULL;
1538         }
1539
1540         vcrypto->option = (uint8_t)option;
1541
1542         return 0;
1543 }
1544
1545 uint16_t
1546 rte_vhost_crypto_fetch_requests(int vid, uint32_t qid,
1547                 struct rte_crypto_op **ops, uint16_t nb_ops)
1548 {
1549         struct rte_mbuf *mbufs[VHOST_CRYPTO_MAX_BURST_SIZE * 2];
1550         struct virtio_net *dev = get_device(vid);
1551         struct vhost_crypto *vcrypto;
1552         struct vhost_virtqueue *vq;
1553         uint16_t avail_idx;
1554         uint16_t start_idx;
1555         uint16_t count;
1556         uint16_t i = 0;
1557
1558         if (unlikely(dev == NULL)) {
1559                 VC_LOG_ERR("Invalid vid %i", vid);
1560                 return 0;
1561         }
1562
1563         if (unlikely(qid >= VHOST_MAX_QUEUE_PAIRS)) {
1564                 VC_LOG_ERR("Invalid qid %u", qid);
1565                 return 0;
1566         }
1567
1568         vcrypto = (struct vhost_crypto *)dev->extern_data;
1569         if (unlikely(vcrypto == NULL)) {
1570                 VC_LOG_ERR("Cannot find required data, is it initialized?");
1571                 return 0;
1572         }
1573
1574         vq = dev->virtqueue[qid];
1575
1576         avail_idx = *((volatile uint16_t *)&vq->avail->idx);
1577         start_idx = vq->last_used_idx;
1578         count = avail_idx - start_idx;
1579         count = RTE_MIN(count, VHOST_CRYPTO_MAX_BURST_SIZE);
1580         count = RTE_MIN(count, nb_ops);
1581
1582         if (unlikely(count == 0))
1583                 return 0;
1584
1585         /* for zero copy, we need 2 empty mbufs for src and dst, otherwise
1586          * we need only 1 mbuf as src and dst
1587          */
1588         switch (vcrypto->option) {
1589         case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE:
1590                 if (unlikely(rte_mempool_get_bulk(vcrypto->mbuf_pool,
1591                                 (void **)mbufs, count * 2) < 0)) {
1592                         VC_LOG_ERR("Insufficient memory");
1593                         return 0;
1594                 }
1595
1596                 for (i = 0; i < count; i++) {
1597                         uint16_t used_idx = (start_idx + i) & (vq->size - 1);
1598                         uint16_t desc_idx = vq->avail->ring[used_idx];
1599                         struct vring_desc *head = &vq->desc[desc_idx];
1600                         struct rte_crypto_op *op = ops[i];
1601
1602                         op->sym->m_src = mbufs[i * 2];
1603                         op->sym->m_dst = mbufs[i * 2 + 1];
1604                         op->sym->m_src->data_off = 0;
1605                         op->sym->m_dst->data_off = 0;
1606
1607                         if (unlikely(vhost_crypto_process_one_req(vcrypto, vq,
1608                                         op, head, desc_idx) < 0))
1609                                 break;
1610                 }
1611
1612                 if (unlikely(i < count))
1613                         rte_mempool_put_bulk(vcrypto->mbuf_pool,
1614                                         (void **)&mbufs[i * 2],
1615                                         (count - i) * 2);
1616
1617                 break;
1618
1619         case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE:
1620                 if (unlikely(rte_mempool_get_bulk(vcrypto->mbuf_pool,
1621                                 (void **)mbufs, count) < 0)) {
1622                         VC_LOG_ERR("Insufficient memory");
1623                         return 0;
1624                 }
1625
1626                 for (i = 0; i < count; i++) {
1627                         uint16_t used_idx = (start_idx + i) & (vq->size - 1);
1628                         uint16_t desc_idx = vq->avail->ring[used_idx];
1629                         struct vring_desc *head = &vq->desc[desc_idx];
1630                         struct rte_crypto_op *op = ops[i];
1631
1632                         op->sym->m_src = mbufs[i];
1633                         op->sym->m_dst = NULL;
1634                         op->sym->m_src->data_off = 0;
1635
1636                         if (unlikely(vhost_crypto_process_one_req(vcrypto, vq,
1637                                         op, head, desc_idx) < 0))
1638                                 break;
1639                 }
1640
1641                 if (unlikely(i < count))
1642                         rte_mempool_put_bulk(vcrypto->mbuf_pool,
1643                                         (void **)&mbufs[i],
1644                                         count - i);
1645
1646                 break;
1647
1648         }
1649
1650         vq->last_used_idx += i;
1651
1652         return i;
1653 }
1654
1655 uint16_t
1656 rte_vhost_crypto_finalize_requests(struct rte_crypto_op **ops,
1657                 uint16_t nb_ops, int *callfds, uint16_t *nb_callfds)
1658 {
1659         struct rte_crypto_op **tmp_ops = ops;
1660         uint16_t count = 0, left = nb_ops;
1661         int callfd;
1662         uint16_t idx = 0;
1663
1664         while (left) {
1665                 count = vhost_crypto_complete_one_vm_requests(tmp_ops, left,
1666                                 &callfd);
1667                 if (unlikely(count == 0))
1668                         break;
1669
1670                 tmp_ops = &tmp_ops[count];
1671                 left -= count;
1672
1673                 callfds[idx++] = callfd;
1674
1675                 if (unlikely(idx >= VIRTIO_CRYPTO_MAX_NUM_BURST_VQS)) {
1676                         VC_LOG_ERR("Too many vqs");
1677                         break;
1678                 }
1679         }
1680
1681         *nb_callfds = idx;
1682
1683         return nb_ops - left;
1684 }