1 /*- 2 * Copyright (c) 2019 Mellanox Technologies. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 * 25 * $FreeBSD$ 26 */ 27 28 #include "opt_kern_tls.h" 29 30 #include "en.h" 31 32 #include <dev/mlx5/tls.h> 33 34 #include <linux/delay.h> 35 #include <sys/ktls.h> 36 #include <opencrypto/cryptodev.h> 37 38 #ifdef KERN_TLS 39 40 MALLOC_DEFINE(M_MLX5E_TLS, "MLX5E_TLS", "MLX5 ethernet HW TLS"); 41 42 /* software TLS context */ 43 struct mlx5_ifc_sw_tls_cntx_bits { 44 struct mlx5_ifc_tls_static_params_bits param; 45 struct mlx5_ifc_tls_progress_params_bits progress; 46 struct { 47 uint8_t key_data[8][0x20]; 48 uint8_t key_len[0x20]; 49 } key; 50 }; 51 52 CTASSERT(MLX5_ST_SZ_BYTES(sw_tls_cntx) <= sizeof(((struct mlx5e_tls_tag *)0)->crypto_params)); 53 CTASSERT(MLX5_ST_SZ_BYTES(mkc) == sizeof(((struct mlx5e_tx_umr_wqe *)0)->mkc)); 54 55 static const char *mlx5e_tls_stats_desc[] = { 56 MLX5E_TLS_STATS(MLX5E_STATS_DESC) 57 }; 58 59 static void mlx5e_tls_work(struct work_struct *); 60 61 static int 62 mlx5e_tls_tag_zinit(void *mem, int size, int flags) 63 { 64 struct mlx5e_tls_tag *ptag = mem; 65 66 MPASS(size == sizeof(*ptag)); 67 68 memset(ptag, 0, sizeof(*ptag)); 69 mtx_init(&ptag->mtx, "mlx5-tls-tag-mtx", NULL, MTX_DEF); 70 INIT_WORK(&ptag->work, mlx5e_tls_work); 71 72 return (0); 73 } 74 75 static void 76 mlx5e_tls_tag_zfini(void *mem, int size) 77 { 78 struct mlx5e_tls_tag *ptag = mem; 79 struct mlx5e_priv *priv; 80 struct mlx5e_tls *ptls; 81 82 ptls = ptag->tls; 83 priv = container_of(ptls, struct mlx5e_priv, tls); 84 85 flush_work(&ptag->work); 86 87 if (ptag->tisn != 0) { 88 mlx5_tls_close_tis(priv->mdev, ptag->tisn); 89 atomic_add_32(&ptls->num_resources, -1U); 90 } 91 92 mtx_destroy(&ptag->mtx); 93 } 94 95 static void 96 mlx5e_tls_tag_zfree(struct mlx5e_tls_tag *ptag) 97 { 98 99 /* reset some variables */ 100 ptag->state = MLX5E_TLS_ST_INIT; 101 ptag->dek_index = 0; 102 ptag->dek_index_ok = 0; 103 104 /* avoid leaking keys */ 105 memset(ptag->crypto_params, 0, sizeof(ptag->crypto_params)); 106 107 /* update number of TIS contexts */ 108 if (ptag->tisn == 0) 109 atomic_add_32(&ptag->tls->num_resources, -1U); 110 111 /* return tag to UMA */ 112 uma_zfree(ptag->tls->zone, ptag); 113 } 114 115 int 116 mlx5e_tls_init(struct mlx5e_priv *priv) 117 { 118 struct mlx5e_tls *ptls = &priv->tls; 119 struct sysctl_oid *node; 120 uint32_t x; 121 122 if (MLX5_CAP_GEN(priv->mdev, tls_tx) == 0) 123 return (0); 124 125 ptls->wq = create_singlethread_workqueue("mlx5-tls-wq"); 126 if (ptls->wq == NULL) 127 return (ENOMEM); 128 129 sysctl_ctx_init(&ptls->ctx); 130 131 snprintf(ptls->zname, sizeof(ptls->zname), 132 "mlx5_%u_tls", device_get_unit(priv->mdev->pdev->dev.bsddev)); 133 134 ptls->zone = uma_zcreate(ptls->zname, sizeof(struct mlx5e_tls_tag), 135 NULL, NULL, mlx5e_tls_tag_zinit, mlx5e_tls_tag_zfini, UMA_ALIGN_CACHE, 0); 136 137 ptls->max_resources = 1U << MLX5_CAP_GEN(priv->mdev, log_max_dek); 138 139 for (x = 0; x != MLX5E_TLS_STATS_NUM; x++) 140 ptls->stats.arg[x] = counter_u64_alloc(M_WAITOK); 141 142 ptls->init = 1; 143 144 node = SYSCTL_ADD_NODE(&priv->sysctl_ctx, 145 SYSCTL_CHILDREN(priv->sysctl_ifnet), OID_AUTO, 146 "tls", CTLFLAG_RW | CTLFLAG_MPSAFE, NULL, "Hardware TLS offload"); 147 if (node == NULL) 148 return (0); 149 150 mlx5e_create_counter_stats(&ptls->ctx, 151 SYSCTL_CHILDREN(node), "stats", 152 mlx5e_tls_stats_desc, MLX5E_TLS_STATS_NUM, 153 ptls->stats.arg); 154 155 return (0); 156 } 157 158 void 159 mlx5e_tls_cleanup(struct mlx5e_priv *priv) 160 { 161 struct mlx5e_tls *ptls = &priv->tls; 162 uint32_t x; 163 164 if (MLX5_CAP_GEN(priv->mdev, tls_tx) == 0) 165 return; 166 167 ptls->init = 0; 168 flush_workqueue(ptls->wq); 169 sysctl_ctx_free(&ptls->ctx); 170 uma_zdestroy(ptls->zone); 171 destroy_workqueue(ptls->wq); 172 173 /* check if all resources are freed */ 174 MPASS(priv->tls.num_resources == 0); 175 176 for (x = 0; x != MLX5E_TLS_STATS_NUM; x++) 177 counter_u64_free(ptls->stats.arg[x]); 178 } 179 180 static void 181 mlx5e_tls_work(struct work_struct *work) 182 { 183 struct mlx5e_tls_tag *ptag; 184 struct mlx5e_priv *priv; 185 int err; 186 187 ptag = container_of(work, struct mlx5e_tls_tag, work); 188 priv = container_of(ptag->tls, struct mlx5e_priv, tls); 189 190 switch (ptag->state) { 191 case MLX5E_TLS_ST_SETUP: 192 /* try to open TIS, if not present */ 193 if (ptag->tisn == 0) { 194 err = mlx5_tls_open_tis(priv->mdev, 0, priv->tdn, 195 priv->pdn, &ptag->tisn); 196 if (err) { 197 MLX5E_TLS_STAT_INC(ptag, tx_error, 1); 198 break; 199 } 200 } 201 MLX5_SET(sw_tls_cntx, ptag->crypto_params, progress.pd, ptag->tisn); 202 203 /* try to allocate a DEK context ID */ 204 err = mlx5_encryption_key_create(priv->mdev, priv->pdn, 205 MLX5_ADDR_OF(sw_tls_cntx, ptag->crypto_params, key.key_data), 206 MLX5_GET(sw_tls_cntx, ptag->crypto_params, key.key_len), 207 &ptag->dek_index); 208 if (err) { 209 MLX5E_TLS_STAT_INC(ptag, tx_error, 1); 210 break; 211 } 212 213 MLX5_SET(sw_tls_cntx, ptag->crypto_params, param.dek_index, ptag->dek_index); 214 215 ptag->dek_index_ok = 1; 216 217 MLX5E_TLS_TAG_LOCK(ptag); 218 if (ptag->state == MLX5E_TLS_ST_SETUP) 219 ptag->state = MLX5E_TLS_ST_TXRDY; 220 MLX5E_TLS_TAG_UNLOCK(ptag); 221 break; 222 223 case MLX5E_TLS_ST_FREED: 224 /* wait for all refs to go away */ 225 while (ptag->refs != 0) 226 msleep(1); 227 228 /* try to destroy DEK context by ID */ 229 if (ptag->dek_index_ok) 230 err = mlx5_encryption_key_destroy(priv->mdev, ptag->dek_index); 231 232 /* free tag */ 233 mlx5e_tls_tag_zfree(ptag); 234 break; 235 236 default: 237 break; 238 } 239 } 240 241 static int 242 mlx5e_tls_set_params(void *ctx, const struct tls_session_params *en) 243 { 244 245 MLX5_SET(sw_tls_cntx, ctx, param.const_2, 2); 246 if (en->tls_vminor == TLS_MINOR_VER_TWO) 247 MLX5_SET(sw_tls_cntx, ctx, param.tls_version, 2); /* v1.2 */ 248 else 249 MLX5_SET(sw_tls_cntx, ctx, param.tls_version, 3); /* v1.3 */ 250 MLX5_SET(sw_tls_cntx, ctx, param.const_1, 1); 251 MLX5_SET(sw_tls_cntx, ctx, param.encryption_standard, 1); /* TLS */ 252 253 /* copy the initial vector in place */ 254 switch (en->iv_len) { 255 case MLX5_FLD_SZ_BYTES(sw_tls_cntx, param.gcm_iv): 256 case MLX5_FLD_SZ_BYTES(sw_tls_cntx, param.gcm_iv) + 257 MLX5_FLD_SZ_BYTES(sw_tls_cntx, param.implicit_iv): 258 memcpy(MLX5_ADDR_OF(sw_tls_cntx, ctx, param.gcm_iv), 259 en->iv, en->iv_len); 260 break; 261 default: 262 return (EINVAL); 263 } 264 265 if (en->cipher_key_len <= MLX5_FLD_SZ_BYTES(sw_tls_cntx, key.key_data)) { 266 memcpy(MLX5_ADDR_OF(sw_tls_cntx, ctx, key.key_data), 267 en->cipher_key, en->cipher_key_len); 268 MLX5_SET(sw_tls_cntx, ctx, key.key_len, en->cipher_key_len); 269 } else { 270 return (EINVAL); 271 } 272 return (0); 273 } 274 275 /* Verify zero default */ 276 CTASSERT(MLX5E_TLS_ST_INIT == 0); 277 278 int 279 mlx5e_tls_snd_tag_alloc(struct ifnet *ifp, 280 union if_snd_tag_alloc_params *params, 281 struct m_snd_tag **ppmt) 282 { 283 struct if_snd_tag_alloc_rate_limit rl_params; 284 struct mlx5e_priv *priv; 285 struct mlx5e_tls_tag *ptag; 286 const struct tls_session_params *en; 287 int error; 288 289 priv = ifp->if_softc; 290 291 if (priv->tls.init == 0) 292 return (EOPNOTSUPP); 293 294 /* allocate new tag from zone, if any */ 295 ptag = uma_zalloc(priv->tls.zone, M_NOWAIT); 296 if (ptag == NULL) 297 return (ENOMEM); 298 299 /* sanity check default values */ 300 MPASS(ptag->state == MLX5E_TLS_ST_INIT); 301 MPASS(ptag->dek_index == 0); 302 MPASS(ptag->dek_index_ok == 0); 303 304 /* setup TLS tag */ 305 ptag->tls = &priv->tls; 306 ptag->tag.type = params->hdr.type; 307 308 /* check if there is no TIS context */ 309 if (ptag->tisn == 0) { 310 uint32_t value; 311 312 value = atomic_fetchadd_32(&priv->tls.num_resources, 1U); 313 314 /* check resource limits */ 315 if (value >= priv->tls.max_resources) { 316 error = ENOMEM; 317 goto failure; 318 } 319 } 320 321 en = ¶ms->tls.tls->params; 322 323 /* only TLS v1.2 and v1.3 is currently supported */ 324 if (en->tls_vmajor != TLS_MAJOR_VER_ONE || 325 (en->tls_vminor != TLS_MINOR_VER_TWO 326 #ifdef TLS_MINOR_VER_THREE 327 && en->tls_vminor != TLS_MINOR_VER_THREE 328 #endif 329 )) { 330 error = EPROTONOSUPPORT; 331 goto failure; 332 } 333 334 switch (en->cipher_algorithm) { 335 case CRYPTO_AES_NIST_GCM_16: 336 switch (en->cipher_key_len) { 337 case 128 / 8: 338 if (en->tls_vminor == TLS_MINOR_VER_TWO) { 339 if (MLX5_CAP_TLS(priv->mdev, tls_1_2_aes_gcm_128) == 0) { 340 error = EPROTONOSUPPORT; 341 goto failure; 342 } 343 } else { 344 if (MLX5_CAP_TLS(priv->mdev, tls_1_3_aes_gcm_128) == 0) { 345 error = EPROTONOSUPPORT; 346 goto failure; 347 } 348 } 349 error = mlx5e_tls_set_params(ptag->crypto_params, en); 350 if (error) 351 goto failure; 352 break; 353 354 case 256 / 8: 355 if (en->tls_vminor == TLS_MINOR_VER_TWO) { 356 if (MLX5_CAP_TLS(priv->mdev, tls_1_2_aes_gcm_256) == 0) { 357 error = EPROTONOSUPPORT; 358 goto failure; 359 } 360 } else { 361 if (MLX5_CAP_TLS(priv->mdev, tls_1_3_aes_gcm_256) == 0) { 362 error = EPROTONOSUPPORT; 363 goto failure; 364 } 365 } 366 error = mlx5e_tls_set_params(ptag->crypto_params, en); 367 if (error) 368 goto failure; 369 break; 370 371 default: 372 error = EINVAL; 373 goto failure; 374 } 375 break; 376 default: 377 error = EPROTONOSUPPORT; 378 goto failure; 379 } 380 381 switch (ptag->tag.type) { 382 #if defined(RATELIMIT) && defined(IF_SND_TAG_TYPE_TLS_RATE_LIMIT) 383 case IF_SND_TAG_TYPE_TLS_RATE_LIMIT: 384 memset(&rl_params, 0, sizeof(rl_params)); 385 rl_params.hdr = params->tls_rate_limit.hdr; 386 rl_params.hdr.type = IF_SND_TAG_TYPE_RATE_LIMIT; 387 rl_params.max_rate = params->tls_rate_limit.max_rate; 388 389 error = mlx5e_rl_snd_tag_alloc(ifp, 390 container_of(&rl_params, union if_snd_tag_alloc_params, rate_limit), 391 &ptag->rl_tag); 392 if (error) 393 goto failure; 394 break; 395 #endif 396 case IF_SND_TAG_TYPE_TLS: 397 memset(&rl_params, 0, sizeof(rl_params)); 398 rl_params.hdr = params->tls.hdr; 399 rl_params.hdr.type = IF_SND_TAG_TYPE_UNLIMITED; 400 401 error = mlx5e_ul_snd_tag_alloc(ifp, 402 container_of(&rl_params, union if_snd_tag_alloc_params, unlimited), 403 &ptag->rl_tag); 404 if (error) 405 goto failure; 406 break; 407 default: 408 error = EOPNOTSUPP; 409 goto failure; 410 } 411 412 /* store pointer to mbuf tag */ 413 MPASS(ptag->tag.m_snd_tag.refcount == 0); 414 m_snd_tag_init(&ptag->tag.m_snd_tag, ifp); 415 *ppmt = &ptag->tag.m_snd_tag; 416 return (0); 417 418 failure: 419 mlx5e_tls_tag_zfree(ptag); 420 return (error); 421 } 422 423 int 424 mlx5e_tls_snd_tag_modify(struct m_snd_tag *pmt, union if_snd_tag_modify_params *params) 425 { 426 #if defined(RATELIMIT) && defined(IF_SND_TAG_TYPE_TLS_RATE_LIMIT) 427 struct if_snd_tag_rate_limit_params rl_params; 428 int error; 429 #endif 430 struct mlx5e_tls_tag *ptag = 431 container_of(pmt, struct mlx5e_tls_tag, tag.m_snd_tag); 432 433 switch (ptag->tag.type) { 434 #if defined(RATELIMIT) && defined(IF_SND_TAG_TYPE_TLS_RATE_LIMIT) 435 case IF_SND_TAG_TYPE_TLS_RATE_LIMIT: 436 memset(&rl_params, 0, sizeof(rl_params)); 437 rl_params.max_rate = params->tls_rate_limit.max_rate; 438 error = mlx5e_rl_snd_tag_modify(ptag->rl_tag, 439 container_of(&rl_params, union if_snd_tag_modify_params, rate_limit)); 440 return (error); 441 #endif 442 default: 443 return (EOPNOTSUPP); 444 } 445 } 446 447 int 448 mlx5e_tls_snd_tag_query(struct m_snd_tag *pmt, union if_snd_tag_query_params *params) 449 { 450 struct mlx5e_tls_tag *ptag = 451 container_of(pmt, struct mlx5e_tls_tag, tag.m_snd_tag); 452 int error; 453 454 switch (ptag->tag.type) { 455 #if defined(RATELIMIT) && defined(IF_SND_TAG_TYPE_TLS_RATE_LIMIT) 456 case IF_SND_TAG_TYPE_TLS_RATE_LIMIT: 457 error = mlx5e_rl_snd_tag_query(ptag->rl_tag, params); 458 break; 459 #endif 460 case IF_SND_TAG_TYPE_TLS: 461 error = mlx5e_ul_snd_tag_query(ptag->rl_tag, params); 462 break; 463 default: 464 error = EOPNOTSUPP; 465 break; 466 } 467 return (error); 468 } 469 470 void 471 mlx5e_tls_snd_tag_free(struct m_snd_tag *pmt) 472 { 473 struct mlx5e_tls_tag *ptag = 474 container_of(pmt, struct mlx5e_tls_tag, tag.m_snd_tag); 475 struct mlx5e_priv *priv; 476 477 switch (ptag->tag.type) { 478 #if defined(RATELIMIT) && defined(IF_SND_TAG_TYPE_TLS_RATE_LIMIT) 479 case IF_SND_TAG_TYPE_TLS_RATE_LIMIT: 480 mlx5e_rl_snd_tag_free(ptag->rl_tag); 481 break; 482 #endif 483 case IF_SND_TAG_TYPE_TLS: 484 mlx5e_ul_snd_tag_free(ptag->rl_tag); 485 break; 486 default: 487 break; 488 } 489 490 MLX5E_TLS_TAG_LOCK(ptag); 491 ptag->state = MLX5E_TLS_ST_FREED; 492 MLX5E_TLS_TAG_UNLOCK(ptag); 493 494 priv = ptag->tag.m_snd_tag.ifp->if_softc; 495 queue_work(priv->tls.wq, &ptag->work); 496 } 497 498 CTASSERT((MLX5_FLD_SZ_BYTES(sw_tls_cntx, param) % 16) == 0); 499 500 static void 501 mlx5e_tls_send_static_parameters(struct mlx5e_sq *sq, struct mlx5e_tls_tag *ptag) 502 { 503 const u32 ds_cnt = DIV_ROUND_UP(sizeof(struct mlx5e_tx_umr_wqe) + 504 MLX5_FLD_SZ_BYTES(sw_tls_cntx, param), MLX5_SEND_WQE_DS); 505 struct mlx5e_tx_umr_wqe *wqe; 506 u16 pi; 507 508 pi = sq->pc & sq->wq.sz_m1; 509 wqe = mlx5_wq_cyc_get_wqe(&sq->wq, pi); 510 511 memset(wqe, 0, sizeof(*wqe)); 512 513 wqe->ctrl.opmod_idx_opcode = cpu_to_be32((sq->pc << 8) | 514 MLX5_OPCODE_UMR | (MLX5_OPCODE_MOD_UMR_TLS_TIS_STATIC_PARAMS << 24)); 515 wqe->ctrl.qpn_ds = cpu_to_be32((sq->sqn << 8) | ds_cnt); 516 wqe->ctrl.imm = cpu_to_be32(ptag->tisn << 8); 517 518 if (mlx5e_do_send_cqe(sq)) 519 wqe->ctrl.fm_ce_se = MLX5_WQE_CTRL_CQ_UPDATE | MLX5_FENCE_MODE_INITIATOR_SMALL; 520 else 521 wqe->ctrl.fm_ce_se = MLX5_FENCE_MODE_INITIATOR_SMALL; 522 523 /* fill out UMR control segment */ 524 wqe->umr.flags = 0x80; /* inline data */ 525 wqe->umr.bsf_octowords = cpu_to_be16(MLX5_FLD_SZ_BYTES(sw_tls_cntx, param) / 16); 526 527 /* copy in the static crypto parameters */ 528 memcpy(wqe + 1, MLX5_ADDR_OF(sw_tls_cntx, ptag->crypto_params, param), 529 MLX5_FLD_SZ_BYTES(sw_tls_cntx, param)); 530 531 /* copy data for doorbell */ 532 memcpy(sq->doorbell.d32, &wqe->ctrl, sizeof(sq->doorbell.d32)); 533 534 sq->mbuf[pi].mbuf = NULL; 535 sq->mbuf[pi].num_bytes = 0; 536 sq->mbuf[pi].num_wqebbs = DIV_ROUND_UP(ds_cnt, MLX5_SEND_WQEBB_NUM_DS); 537 sq->mbuf[pi].p_refcount = &ptag->refs; 538 atomic_add_int(&ptag->refs, 1); 539 sq->pc += sq->mbuf[pi].num_wqebbs; 540 } 541 542 CTASSERT(MLX5_FLD_SZ_BYTES(sw_tls_cntx, progress) == 543 sizeof(((struct mlx5e_tx_psv_wqe *)0)->psv)); 544 545 static void 546 mlx5e_tls_send_progress_parameters(struct mlx5e_sq *sq, struct mlx5e_tls_tag *ptag) 547 { 548 const u32 ds_cnt = DIV_ROUND_UP(sizeof(struct mlx5e_tx_psv_wqe), 549 MLX5_SEND_WQE_DS); 550 struct mlx5e_tx_psv_wqe *wqe; 551 u16 pi; 552 553 pi = sq->pc & sq->wq.sz_m1; 554 wqe = mlx5_wq_cyc_get_wqe(&sq->wq, pi); 555 556 memset(wqe, 0, sizeof(*wqe)); 557 558 wqe->ctrl.opmod_idx_opcode = cpu_to_be32((sq->pc << 8) | 559 MLX5_OPCODE_SET_PSV | (MLX5_OPCODE_MOD_PSV_TLS_TIS_PROGRESS_PARAMS << 24)); 560 wqe->ctrl.qpn_ds = cpu_to_be32((sq->sqn << 8) | ds_cnt); 561 562 if (mlx5e_do_send_cqe(sq)) 563 wqe->ctrl.fm_ce_se = MLX5_WQE_CTRL_CQ_UPDATE; 564 565 /* copy in the PSV control segment */ 566 memcpy(&wqe->psv, MLX5_ADDR_OF(sw_tls_cntx, ptag->crypto_params, progress), 567 sizeof(wqe->psv)); 568 569 /* copy data for doorbell */ 570 memcpy(sq->doorbell.d32, &wqe->ctrl, sizeof(sq->doorbell.d32)); 571 572 sq->mbuf[pi].mbuf = NULL; 573 sq->mbuf[pi].num_bytes = 0; 574 sq->mbuf[pi].num_wqebbs = DIV_ROUND_UP(ds_cnt, MLX5_SEND_WQEBB_NUM_DS); 575 sq->mbuf[pi].p_refcount = &ptag->refs; 576 atomic_add_int(&ptag->refs, 1); 577 sq->pc += sq->mbuf[pi].num_wqebbs; 578 } 579 580 static void 581 mlx5e_tls_send_nop(struct mlx5e_sq *sq, struct mlx5e_tls_tag *ptag) 582 { 583 const u32 ds_cnt = MLX5_SEND_WQEBB_NUM_DS; 584 struct mlx5e_tx_wqe *wqe; 585 u16 pi; 586 587 pi = sq->pc & sq->wq.sz_m1; 588 wqe = mlx5_wq_cyc_get_wqe(&sq->wq, pi); 589 590 memset(&wqe->ctrl, 0, sizeof(wqe->ctrl)); 591 592 wqe->ctrl.opmod_idx_opcode = cpu_to_be32((sq->pc << 8) | MLX5_OPCODE_NOP); 593 wqe->ctrl.qpn_ds = cpu_to_be32((sq->sqn << 8) | ds_cnt); 594 if (mlx5e_do_send_cqe(sq)) 595 wqe->ctrl.fm_ce_se = MLX5_WQE_CTRL_CQ_UPDATE | MLX5_FENCE_MODE_INITIATOR_SMALL; 596 else 597 wqe->ctrl.fm_ce_se = MLX5_FENCE_MODE_INITIATOR_SMALL; 598 599 /* Copy data for doorbell */ 600 memcpy(sq->doorbell.d32, &wqe->ctrl, sizeof(sq->doorbell.d32)); 601 602 sq->mbuf[pi].mbuf = NULL; 603 sq->mbuf[pi].num_bytes = 0; 604 sq->mbuf[pi].num_wqebbs = DIV_ROUND_UP(ds_cnt, MLX5_SEND_WQEBB_NUM_DS); 605 sq->mbuf[pi].p_refcount = &ptag->refs; 606 atomic_add_int(&ptag->refs, 1); 607 sq->pc += sq->mbuf[pi].num_wqebbs; 608 } 609 610 #define SBTLS_MBUF_NO_DATA ((struct mbuf *)1) 611 612 static struct mbuf * 613 sbtls_recover_record(struct mbuf *mb, int wait, uint32_t tcp_old, uint32_t *ptcp_seq, bool *pis_start) 614 { 615 struct mbuf *mr, *top; 616 uint32_t offset; 617 uint32_t delta; 618 619 /* check format of incoming mbuf */ 620 if (mb->m_next == NULL || 621 (mb->m_next->m_flags & (M_EXTPG | M_EXT)) != (M_EXTPG | M_EXT)) { 622 top = NULL; 623 goto done; 624 } 625 626 /* get unmapped data offset */ 627 offset = mtod(mb->m_next, uintptr_t); 628 629 /* check if we don't need to re-transmit anything */ 630 if (offset == 0) { 631 top = SBTLS_MBUF_NO_DATA; 632 *pis_start = true; 633 goto done; 634 } 635 636 /* try to get a new packet header */ 637 top = m_gethdr(wait, MT_DATA); 638 if (top == NULL) 639 goto done; 640 641 mr = m_get(wait, MT_DATA); 642 if (mr == NULL) { 643 m_free(top); 644 top = NULL; 645 goto done; 646 } 647 648 top->m_next = mr; 649 650 mb_dupcl(mr, mb->m_next); 651 652 /* the beginning of the TLS record */ 653 mr->m_data = NULL; 654 655 /* setup packet header length */ 656 top->m_pkthdr.len = mr->m_len = offset; 657 top->m_len = 0; 658 659 /* check for partial re-transmit */ 660 delta = *ptcp_seq - tcp_old; 661 662 if (delta < offset) { 663 m_adj(top, offset - delta); 664 offset = delta; 665 666 /* continue where we left off */ 667 *pis_start = false; 668 } else { 669 *pis_start = true; 670 } 671 672 /* 673 * Rewind the TCP sequence number by the amount of data 674 * retransmitted: 675 */ 676 *ptcp_seq -= offset; 677 done: 678 return (top); 679 } 680 681 static int 682 mlx5e_sq_tls_populate(struct mbuf *mb, uint64_t *pseq) 683 { 684 685 for (; mb != NULL; mb = mb->m_next) { 686 if (!(mb->m_flags & M_EXTPG)) 687 continue; 688 *pseq = mb->m_epg_seqno; 689 return (1); 690 } 691 return (0); 692 } 693 694 int 695 mlx5e_sq_tls_xmit(struct mlx5e_sq *sq, struct mlx5e_xmit_args *parg, struct mbuf **ppmb) 696 { 697 struct mlx5e_tls_tag *ptls_tag; 698 struct mlx5e_snd_tag *ptag; 699 const struct tcphdr *th; 700 struct mbuf *mb = *ppmb; 701 u64 rcd_sn; 702 u32 header_size; 703 u32 mb_seq; 704 705 if ((mb->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0) 706 return (MLX5E_TLS_CONTINUE); 707 708 ptag = container_of(mb->m_pkthdr.snd_tag, 709 struct mlx5e_snd_tag, m_snd_tag); 710 711 if ( 712 #if defined(RATELIMIT) && defined(IF_SND_TAG_TYPE_TLS_RATE_LIMIT) 713 ptag->type != IF_SND_TAG_TYPE_TLS_RATE_LIMIT && 714 #endif 715 ptag->type != IF_SND_TAG_TYPE_TLS) 716 return (MLX5E_TLS_CONTINUE); 717 718 ptls_tag = container_of(ptag, struct mlx5e_tls_tag, tag); 719 720 header_size = mlx5e_get_full_header_size(mb, &th); 721 if (unlikely(header_size == 0 || th == NULL)) 722 return (MLX5E_TLS_FAILURE); 723 724 /* 725 * Send non-TLS TCP packets AS-IS: 726 */ 727 if (header_size == mb->m_pkthdr.len || 728 mlx5e_sq_tls_populate(mb, &rcd_sn) == 0) { 729 parg->tisn = 0; 730 parg->ihs = header_size; 731 return (MLX5E_TLS_CONTINUE); 732 } 733 734 mb_seq = ntohl(th->th_seq); 735 736 MLX5E_TLS_TAG_LOCK(ptls_tag); 737 switch (ptls_tag->state) { 738 case MLX5E_TLS_ST_INIT: 739 queue_work(sq->priv->tls.wq, &ptls_tag->work); 740 ptls_tag->state = MLX5E_TLS_ST_SETUP; 741 ptls_tag->expected_seq = ~mb_seq; /* force setup */ 742 MLX5E_TLS_TAG_UNLOCK(ptls_tag); 743 return (MLX5E_TLS_FAILURE); 744 745 case MLX5E_TLS_ST_SETUP: 746 MLX5E_TLS_TAG_UNLOCK(ptls_tag); 747 return (MLX5E_TLS_FAILURE); 748 749 default: 750 MLX5E_TLS_TAG_UNLOCK(ptls_tag); 751 break; 752 } 753 754 if (unlikely(ptls_tag->expected_seq != mb_seq)) { 755 bool is_start; 756 struct mbuf *r_mb; 757 uint32_t tcp_seq = mb_seq; 758 759 r_mb = sbtls_recover_record(mb, M_NOWAIT, ptls_tag->expected_seq, &tcp_seq, &is_start); 760 if (r_mb == NULL) { 761 MLX5E_TLS_STAT_INC(ptls_tag, tx_error, 1); 762 return (MLX5E_TLS_FAILURE); 763 } 764 765 MLX5E_TLS_STAT_INC(ptls_tag, tx_packets_ooo, 1); 766 767 /* check if this is the first fragment of a TLS record */ 768 if (is_start) { 769 /* setup TLS static parameters */ 770 MLX5_SET64(sw_tls_cntx, ptls_tag->crypto_params, 771 param.initial_record_number, rcd_sn); 772 773 /* 774 * NOTE: The sendqueue should have enough room to 775 * carry both the static and the progress parameters 776 * when we get here! 777 */ 778 mlx5e_tls_send_static_parameters(sq, ptls_tag); 779 mlx5e_tls_send_progress_parameters(sq, ptls_tag); 780 781 if (r_mb == SBTLS_MBUF_NO_DATA) { 782 mlx5e_tls_send_nop(sq, ptls_tag); 783 ptls_tag->expected_seq = mb_seq; 784 return (MLX5E_TLS_LOOP); 785 } 786 } 787 788 MLX5E_TLS_STAT_INC(ptls_tag, tx_bytes_ooo, r_mb->m_pkthdr.len); 789 790 /* setup transmit arguments */ 791 parg->tisn = ptls_tag->tisn; 792 parg->pref = &ptls_tag->refs; 793 794 /* try to send DUMP data */ 795 if (mlx5e_sq_dump_xmit(sq, parg, &r_mb) != 0) { 796 m_freem(r_mb); 797 ptls_tag->expected_seq = tcp_seq; 798 return (MLX5E_TLS_FAILURE); 799 } else { 800 ptls_tag->expected_seq = mb_seq; 801 return (MLX5E_TLS_LOOP); 802 } 803 } else { 804 MLX5E_TLS_STAT_INC(ptls_tag, tx_packets, 1); 805 MLX5E_TLS_STAT_INC(ptls_tag, tx_bytes, mb->m_pkthdr.len); 806 } 807 ptls_tag->expected_seq += mb->m_pkthdr.len - header_size; 808 809 parg->tisn = ptls_tag->tisn; 810 parg->ihs = header_size; 811 parg->pref = &ptls_tag->refs; 812 return (MLX5E_TLS_CONTINUE); 813 } 814 815 #else 816 817 int 818 mlx5e_tls_init(struct mlx5e_priv *priv) 819 { 820 821 return (0); 822 } 823 824 void 825 mlx5e_tls_cleanup(struct mlx5e_priv *priv) 826 { 827 /* NOP */ 828 } 829 830 #endif /* KERN_TLS */ 831