1// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2/* 3 * Copyright (c) 2020, Mellanox Technologies inc. All rights reserved. 4 */ 5 6#include <linux/gfp.h> 7#include <linux/mlx5/qp.h> 8#include <linux/mlx5/driver.h> 9#include "wr.h" 10#include "umr.h" 11 12static const u32 mlx5_ib_opcode[] = { 13 [IB_WR_SEND] = MLX5_OPCODE_SEND, 14 [IB_WR_LSO] = MLX5_OPCODE_LSO, 15 [IB_WR_SEND_WITH_IMM] = MLX5_OPCODE_SEND_IMM, 16 [IB_WR_RDMA_WRITE] = MLX5_OPCODE_RDMA_WRITE, 17 [IB_WR_RDMA_WRITE_WITH_IMM] = MLX5_OPCODE_RDMA_WRITE_IMM, 18 [IB_WR_RDMA_READ] = MLX5_OPCODE_RDMA_READ, 19 [IB_WR_ATOMIC_CMP_AND_SWP] = MLX5_OPCODE_ATOMIC_CS, 20 [IB_WR_ATOMIC_FETCH_AND_ADD] = MLX5_OPCODE_ATOMIC_FA, 21 [IB_WR_SEND_WITH_INV] = MLX5_OPCODE_SEND_INVAL, 22 [IB_WR_LOCAL_INV] = MLX5_OPCODE_UMR, 23 [IB_WR_REG_MR] = MLX5_OPCODE_UMR, 24 [IB_WR_MASKED_ATOMIC_CMP_AND_SWP] = MLX5_OPCODE_ATOMIC_MASKED_CS, 25 [IB_WR_MASKED_ATOMIC_FETCH_AND_ADD] = MLX5_OPCODE_ATOMIC_MASKED_FA, 26 [MLX5_IB_WR_UMR] = MLX5_OPCODE_UMR, 27}; 28 29int mlx5r_wq_overflow(struct mlx5_ib_wq *wq, int nreq, struct ib_cq *ib_cq) 30{ 31 struct mlx5_ib_cq *cq; 32 unsigned int cur; 33 34 cur = wq->head - wq->tail; 35 if (likely(cur + nreq < wq->max_post)) 36 return 0; 37 38 cq = to_mcq(ib_cq); 39 spin_lock(&cq->lock); 40 cur = wq->head - wq->tail; 41 spin_unlock(&cq->lock); 42 43 return cur + nreq >= wq->max_post; 44} 45 46static __always_inline void set_raddr_seg(struct mlx5_wqe_raddr_seg *rseg, 47 u64 remote_addr, u32 rkey) 48{ 49 rseg->raddr = cpu_to_be64(remote_addr); 50 rseg->rkey = cpu_to_be32(rkey); 51 rseg->reserved = 0; 52} 53 54static void set_eth_seg(const struct ib_send_wr *wr, struct mlx5_ib_qp *qp, 55 void **seg, int *size, void **cur_edge) 56{ 57 struct mlx5_wqe_eth_seg *eseg = *seg; 58 59 memset(eseg, 0, sizeof(struct mlx5_wqe_eth_seg)); 60 61 if (wr->send_flags & IB_SEND_IP_CSUM) 62 eseg->cs_flags = MLX5_ETH_WQE_L3_CSUM | 63 MLX5_ETH_WQE_L4_CSUM; 64 65 if (wr->opcode == IB_WR_LSO) { 66 struct ib_ud_wr *ud_wr = container_of(wr, struct ib_ud_wr, wr); 67 size_t left, copysz; 68 void *pdata = ud_wr->header; 69 size_t stride; 70 71 left = ud_wr->hlen; 72 eseg->mss = cpu_to_be16(ud_wr->mss); 73 eseg->inline_hdr.sz = cpu_to_be16(left); 74 75 /* mlx5r_memcpy_send_wqe should get a 16B align address. Hence, 76 * we first copy up to the current edge and then, if needed, 77 * continue to mlx5r_memcpy_send_wqe. 78 */ 79 copysz = min_t(u64, *cur_edge - (void *)eseg->inline_hdr.start, 80 left); 81 memcpy(eseg->inline_hdr.data, pdata, copysz); 82 stride = ALIGN(sizeof(struct mlx5_wqe_eth_seg) - 83 sizeof(eseg->inline_hdr.start) + copysz, 16); 84 *size += stride / 16; 85 *seg += stride; 86 87 if (copysz < left) { 88 handle_post_send_edge(&qp->sq, seg, *size, cur_edge); 89 left -= copysz; 90 pdata += copysz; 91 mlx5r_memcpy_send_wqe(&qp->sq, cur_edge, seg, size, 92 pdata, left); 93 } 94 95 return; 96 } 97 98 *seg += sizeof(struct mlx5_wqe_eth_seg); 99 *size += sizeof(struct mlx5_wqe_eth_seg) / 16; 100} 101 102static void set_datagram_seg(struct mlx5_wqe_datagram_seg *dseg, 103 const struct ib_send_wr *wr) 104{ 105 memcpy(&dseg->av, &to_mah(ud_wr(wr)->ah)->av, sizeof(struct mlx5_av)); 106 dseg->av.dqp_dct = 107 cpu_to_be32(ud_wr(wr)->remote_qpn | MLX5_EXTENDED_UD_AV); 108 dseg->av.key.qkey.qkey = cpu_to_be32(ud_wr(wr)->remote_qkey); 109} 110 111static void set_data_ptr_seg(struct mlx5_wqe_data_seg *dseg, struct ib_sge *sg) 112{ 113 dseg->byte_count = cpu_to_be32(sg->length); 114 dseg->lkey = cpu_to_be32(sg->lkey); 115 dseg->addr = cpu_to_be64(sg->addr); 116} 117 118static __be64 frwr_mkey_mask(bool atomic) 119{ 120 u64 result; 121 122 result = MLX5_MKEY_MASK_LEN | 123 MLX5_MKEY_MASK_PAGE_SIZE | 124 MLX5_MKEY_MASK_START_ADDR | 125 MLX5_MKEY_MASK_EN_RINVAL | 126 MLX5_MKEY_MASK_KEY | 127 MLX5_MKEY_MASK_LR | 128 MLX5_MKEY_MASK_LW | 129 MLX5_MKEY_MASK_RR | 130 MLX5_MKEY_MASK_RW | 131 MLX5_MKEY_MASK_SMALL_FENCE | 132 MLX5_MKEY_MASK_FREE; 133 134 if (atomic) 135 result |= MLX5_MKEY_MASK_A; 136 137 return cpu_to_be64(result); 138} 139 140static __be64 sig_mkey_mask(void) 141{ 142 u64 result; 143 144 result = MLX5_MKEY_MASK_LEN | 145 MLX5_MKEY_MASK_PAGE_SIZE | 146 MLX5_MKEY_MASK_START_ADDR | 147 MLX5_MKEY_MASK_EN_SIGERR | 148 MLX5_MKEY_MASK_EN_RINVAL | 149 MLX5_MKEY_MASK_KEY | 150 MLX5_MKEY_MASK_LR | 151 MLX5_MKEY_MASK_LW | 152 MLX5_MKEY_MASK_RR | 153 MLX5_MKEY_MASK_RW | 154 MLX5_MKEY_MASK_SMALL_FENCE | 155 MLX5_MKEY_MASK_FREE | 156 MLX5_MKEY_MASK_BSF_EN; 157 158 return cpu_to_be64(result); 159} 160 161static void set_reg_umr_seg(struct mlx5_wqe_umr_ctrl_seg *umr, 162 struct mlx5_ib_mr *mr, u8 flags, bool atomic) 163{ 164 int size = (mr->mmkey.ndescs + mr->meta_ndescs) * mr->desc_size; 165 166 memset(umr, 0, sizeof(*umr)); 167 168 umr->flags = flags; 169 umr->xlt_octowords = cpu_to_be16(mlx5r_umr_get_xlt_octo(size)); 170 umr->mkey_mask = frwr_mkey_mask(atomic); 171} 172 173static void set_linv_umr_seg(struct mlx5_wqe_umr_ctrl_seg *umr) 174{ 175 memset(umr, 0, sizeof(*umr)); 176 umr->mkey_mask = cpu_to_be64(MLX5_MKEY_MASK_FREE); 177 umr->flags = MLX5_UMR_INLINE; 178} 179 180static u8 get_umr_flags(int acc) 181{ 182 return (acc & IB_ACCESS_REMOTE_ATOMIC ? MLX5_PERM_ATOMIC : 0) | 183 (acc & IB_ACCESS_REMOTE_WRITE ? MLX5_PERM_REMOTE_WRITE : 0) | 184 (acc & IB_ACCESS_REMOTE_READ ? MLX5_PERM_REMOTE_READ : 0) | 185 (acc & IB_ACCESS_LOCAL_WRITE ? MLX5_PERM_LOCAL_WRITE : 0) | 186 MLX5_PERM_LOCAL_READ | MLX5_PERM_UMR_EN; 187} 188 189static void set_reg_mkey_seg(struct mlx5_mkey_seg *seg, 190 struct mlx5_ib_mr *mr, 191 u32 key, int access) 192{ 193 int ndescs = ALIGN(mr->mmkey.ndescs + mr->meta_ndescs, 8) >> 1; 194 195 memset(seg, 0, sizeof(*seg)); 196 197 if (mr->access_mode == MLX5_MKC_ACCESS_MODE_MTT) 198 seg->log2_page_size = ilog2(mr->ibmr.page_size); 199 else if (mr->access_mode == MLX5_MKC_ACCESS_MODE_KLMS) 200 /* KLMs take twice the size of MTTs */ 201 ndescs *= 2; 202 203 seg->flags = get_umr_flags(access) | mr->access_mode; 204 seg->qpn_mkey7_0 = cpu_to_be32((key & 0xff) | 0xffffff00); 205 seg->flags_pd = cpu_to_be32(MLX5_MKEY_REMOTE_INVAL); 206 seg->start_addr = cpu_to_be64(mr->ibmr.iova); 207 seg->len = cpu_to_be64(mr->ibmr.length); 208 seg->xlt_oct_size = cpu_to_be32(ndescs); 209} 210 211static void set_linv_mkey_seg(struct mlx5_mkey_seg *seg) 212{ 213 memset(seg, 0, sizeof(*seg)); 214 seg->status = MLX5_MKEY_STATUS_FREE; 215} 216 217static void set_reg_data_seg(struct mlx5_wqe_data_seg *dseg, 218 struct mlx5_ib_mr *mr, 219 struct mlx5_ib_pd *pd) 220{ 221 int bcount = mr->desc_size * (mr->mmkey.ndescs + mr->meta_ndescs); 222 223 dseg->addr = cpu_to_be64(mr->desc_map); 224 dseg->byte_count = cpu_to_be32(ALIGN(bcount, 64)); 225 dseg->lkey = cpu_to_be32(pd->ibpd.local_dma_lkey); 226} 227 228static __be32 send_ieth(const struct ib_send_wr *wr) 229{ 230 switch (wr->opcode) { 231 case IB_WR_SEND_WITH_IMM: 232 case IB_WR_RDMA_WRITE_WITH_IMM: 233 return wr->ex.imm_data; 234 235 case IB_WR_SEND_WITH_INV: 236 return cpu_to_be32(wr->ex.invalidate_rkey); 237 238 default: 239 return 0; 240 } 241} 242 243static u8 calc_sig(void *wqe, int size) 244{ 245 u8 *p = wqe; 246 u8 res = 0; 247 int i; 248 249 for (i = 0; i < size; i++) 250 res ^= p[i]; 251 252 return ~res; 253} 254 255static u8 wq_sig(void *wqe) 256{ 257 return calc_sig(wqe, (*((u8 *)wqe + 8) & 0x3f) << 4); 258} 259 260static int set_data_inl_seg(struct mlx5_ib_qp *qp, const struct ib_send_wr *wr, 261 void **wqe, int *wqe_sz, void **cur_edge) 262{ 263 struct mlx5_wqe_inline_seg *seg; 264 size_t offset; 265 int inl = 0; 266 int i; 267 268 seg = *wqe; 269 *wqe += sizeof(*seg); 270 offset = sizeof(*seg); 271 272 for (i = 0; i < wr->num_sge; i++) { 273 size_t len = wr->sg_list[i].length; 274 void *addr = (void *)(unsigned long)(wr->sg_list[i].addr); 275 276 inl += len; 277 278 if (unlikely(inl > qp->max_inline_data)) 279 return -ENOMEM; 280 281 while (likely(len)) { 282 size_t leftlen; 283 size_t copysz; 284 285 handle_post_send_edge(&qp->sq, wqe, 286 *wqe_sz + (offset >> 4), 287 cur_edge); 288 289 leftlen = *cur_edge - *wqe; 290 copysz = min_t(size_t, leftlen, len); 291 292 memcpy(*wqe, addr, copysz); 293 len -= copysz; 294 addr += copysz; 295 *wqe += copysz; 296 offset += copysz; 297 } 298 } 299 300 seg->byte_count = cpu_to_be32(inl | MLX5_INLINE_SEG); 301 302 *wqe_sz += ALIGN(inl + sizeof(seg->byte_count), 16) / 16; 303 304 return 0; 305} 306 307static u16 prot_field_size(enum ib_signature_type type) 308{ 309 switch (type) { 310 case IB_SIG_TYPE_T10_DIF: 311 return MLX5_DIF_SIZE; 312 default: 313 return 0; 314 } 315} 316 317static u8 bs_selector(int block_size) 318{ 319 switch (block_size) { 320 case 512: return 0x1; 321 case 520: return 0x2; 322 case 4096: return 0x3; 323 case 4160: return 0x4; 324 case 1073741824: return 0x5; 325 default: return 0; 326 } 327} 328 329static void mlx5_fill_inl_bsf(struct ib_sig_domain *domain, 330 struct mlx5_bsf_inl *inl) 331{ 332 /* Valid inline section and allow BSF refresh */ 333 inl->vld_refresh = cpu_to_be16(MLX5_BSF_INL_VALID | 334 MLX5_BSF_REFRESH_DIF); 335 inl->dif_apptag = cpu_to_be16(domain->sig.dif.app_tag); 336 inl->dif_reftag = cpu_to_be32(domain->sig.dif.ref_tag); 337 /* repeating block */ 338 inl->rp_inv_seed = MLX5_BSF_REPEAT_BLOCK; 339 inl->sig_type = domain->sig.dif.bg_type == IB_T10DIF_CRC ? 340 MLX5_DIF_CRC : MLX5_DIF_IPCS; 341 342 if (domain->sig.dif.ref_remap) 343 inl->dif_inc_ref_guard_check |= MLX5_BSF_INC_REFTAG; 344 345 if (domain->sig.dif.app_escape) { 346 if (domain->sig.dif.ref_escape) 347 inl->dif_inc_ref_guard_check |= MLX5_BSF_APPREF_ESCAPE; 348 else 349 inl->dif_inc_ref_guard_check |= MLX5_BSF_APPTAG_ESCAPE; 350 } 351 352 inl->dif_app_bitmask_check = 353 cpu_to_be16(domain->sig.dif.apptag_check_mask); 354} 355 356static int mlx5_set_bsf(struct ib_mr *sig_mr, 357 struct ib_sig_attrs *sig_attrs, 358 struct mlx5_bsf *bsf, u32 data_size) 359{ 360 struct mlx5_core_sig_ctx *msig = to_mmr(sig_mr)->sig; 361 struct mlx5_bsf_basic *basic = &bsf->basic; 362 struct ib_sig_domain *mem = &sig_attrs->mem; 363 struct ib_sig_domain *wire = &sig_attrs->wire; 364 365 memset(bsf, 0, sizeof(*bsf)); 366 367 /* Basic + Extended + Inline */ 368 basic->bsf_size_sbs = 1 << 7; 369 /* Input domain check byte mask */ 370 basic->check_byte_mask = sig_attrs->check_mask; 371 basic->raw_data_size = cpu_to_be32(data_size); 372 373 /* Memory domain */ 374 switch (sig_attrs->mem.sig_type) { 375 case IB_SIG_TYPE_NONE: 376 break; 377 case IB_SIG_TYPE_T10_DIF: 378 basic->mem.bs_selector = bs_selector(mem->sig.dif.pi_interval); 379 basic->m_bfs_psv = cpu_to_be32(msig->psv_memory.psv_idx); 380 mlx5_fill_inl_bsf(mem, &bsf->m_inl); 381 break; 382 default: 383 return -EINVAL; 384 } 385 386 /* Wire domain */ 387 switch (sig_attrs->wire.sig_type) { 388 case IB_SIG_TYPE_NONE: 389 break; 390 case IB_SIG_TYPE_T10_DIF: 391 if (mem->sig.dif.pi_interval == wire->sig.dif.pi_interval && 392 mem->sig_type == wire->sig_type) { 393 /* Same block structure */ 394 basic->bsf_size_sbs |= 1 << 4; 395 if (mem->sig.dif.bg_type == wire->sig.dif.bg_type) 396 basic->wire.copy_byte_mask |= MLX5_CPY_GRD_MASK; 397 if (mem->sig.dif.app_tag == wire->sig.dif.app_tag) 398 basic->wire.copy_byte_mask |= MLX5_CPY_APP_MASK; 399 if (mem->sig.dif.ref_tag == wire->sig.dif.ref_tag) 400 basic->wire.copy_byte_mask |= MLX5_CPY_REF_MASK; 401 } else 402 basic->wire.bs_selector = 403 bs_selector(wire->sig.dif.pi_interval); 404 405 basic->w_bfs_psv = cpu_to_be32(msig->psv_wire.psv_idx); 406 mlx5_fill_inl_bsf(wire, &bsf->w_inl); 407 break; 408 default: 409 return -EINVAL; 410 } 411 412 return 0; 413} 414 415 416static int set_sig_data_segment(const struct ib_send_wr *send_wr, 417 struct ib_mr *sig_mr, 418 struct ib_sig_attrs *sig_attrs, 419 struct mlx5_ib_qp *qp, void **seg, int *size, 420 void **cur_edge) 421{ 422 struct mlx5_bsf *bsf; 423 u32 data_len; 424 u32 data_key; 425 u64 data_va; 426 u32 prot_len = 0; 427 u32 prot_key = 0; 428 u64 prot_va = 0; 429 bool prot = false; 430 int ret; 431 int wqe_size; 432 struct mlx5_ib_mr *mr = to_mmr(sig_mr); 433 struct mlx5_ib_mr *pi_mr = mr->pi_mr; 434 435 data_len = pi_mr->data_length; 436 data_key = pi_mr->ibmr.lkey; 437 data_va = pi_mr->data_iova; 438 if (pi_mr->meta_ndescs) { 439 prot_len = pi_mr->meta_length; 440 prot_key = pi_mr->ibmr.lkey; 441 prot_va = pi_mr->pi_iova; 442 prot = true; 443 } 444 445 if (!prot || (data_key == prot_key && data_va == prot_va && 446 data_len == prot_len)) { 447 /** 448 * Source domain doesn't contain signature information 449 * or data and protection are interleaved in memory. 450 * So need construct: 451 * ------------------ 452 * | data_klm | 453 * ------------------ 454 * | BSF | 455 * ------------------ 456 **/ 457 struct mlx5_klm *data_klm = *seg; 458 459 data_klm->bcount = cpu_to_be32(data_len); 460 data_klm->key = cpu_to_be32(data_key); 461 data_klm->va = cpu_to_be64(data_va); 462 wqe_size = ALIGN(sizeof(*data_klm), 64); 463 } else { 464 /** 465 * Source domain contains signature information 466 * So need construct a strided block format: 467 * --------------------------- 468 * | stride_block_ctrl | 469 * --------------------------- 470 * | data_klm | 471 * --------------------------- 472 * | prot_klm | 473 * --------------------------- 474 * | BSF | 475 * --------------------------- 476 **/ 477 struct mlx5_stride_block_ctrl_seg *sblock_ctrl; 478 struct mlx5_stride_block_entry *data_sentry; 479 struct mlx5_stride_block_entry *prot_sentry; 480 u16 block_size = sig_attrs->mem.sig.dif.pi_interval; 481 int prot_size; 482 483 sblock_ctrl = *seg; 484 data_sentry = (void *)sblock_ctrl + sizeof(*sblock_ctrl); 485 prot_sentry = (void *)data_sentry + sizeof(*data_sentry); 486 487 prot_size = prot_field_size(sig_attrs->mem.sig_type); 488 if (!prot_size) { 489 pr_err("Bad block size given: %u\n", block_size); 490 return -EINVAL; 491 } 492 sblock_ctrl->bcount_per_cycle = cpu_to_be32(block_size + 493 prot_size); 494 sblock_ctrl->op = cpu_to_be32(MLX5_STRIDE_BLOCK_OP); 495 sblock_ctrl->repeat_count = cpu_to_be32(data_len / block_size); 496 sblock_ctrl->num_entries = cpu_to_be16(2); 497 498 data_sentry->bcount = cpu_to_be16(block_size); 499 data_sentry->key = cpu_to_be32(data_key); 500 data_sentry->va = cpu_to_be64(data_va); 501 data_sentry->stride = cpu_to_be16(block_size); 502 503 prot_sentry->bcount = cpu_to_be16(prot_size); 504 prot_sentry->key = cpu_to_be32(prot_key); 505 prot_sentry->va = cpu_to_be64(prot_va); 506 prot_sentry->stride = cpu_to_be16(prot_size); 507 508 wqe_size = ALIGN(sizeof(*sblock_ctrl) + sizeof(*data_sentry) + 509 sizeof(*prot_sentry), 64); 510 } 511 512 *seg += wqe_size; 513 *size += wqe_size / 16; 514 handle_post_send_edge(&qp->sq, seg, *size, cur_edge); 515 516 bsf = *seg; 517 ret = mlx5_set_bsf(sig_mr, sig_attrs, bsf, data_len); 518 if (ret) 519 return -EINVAL; 520 521 *seg += sizeof(*bsf); 522 *size += sizeof(*bsf) / 16; 523 handle_post_send_edge(&qp->sq, seg, *size, cur_edge); 524 525 return 0; 526} 527 528static void set_sig_mkey_segment(struct mlx5_mkey_seg *seg, 529 struct ib_mr *sig_mr, int access_flags, 530 u32 size, u32 length, u32 pdn) 531{ 532 u32 sig_key = sig_mr->rkey; 533 u8 sigerr = to_mmr(sig_mr)->sig->sigerr_count & 1; 534 535 memset(seg, 0, sizeof(*seg)); 536 537 seg->flags = get_umr_flags(access_flags) | MLX5_MKC_ACCESS_MODE_KLMS; 538 seg->qpn_mkey7_0 = cpu_to_be32((sig_key & 0xff) | 0xffffff00); 539 seg->flags_pd = cpu_to_be32(MLX5_MKEY_REMOTE_INVAL | sigerr << 26 | 540 MLX5_MKEY_BSF_EN | pdn); 541 seg->len = cpu_to_be64(length); 542 seg->xlt_oct_size = cpu_to_be32(mlx5r_umr_get_xlt_octo(size)); 543 seg->bsfs_octo_size = cpu_to_be32(MLX5_MKEY_BSF_OCTO_SIZE); 544} 545 546static void set_sig_umr_segment(struct mlx5_wqe_umr_ctrl_seg *umr, 547 u32 size) 548{ 549 memset(umr, 0, sizeof(*umr)); 550 551 umr->flags = MLX5_FLAGS_INLINE | MLX5_FLAGS_CHECK_FREE; 552 umr->xlt_octowords = cpu_to_be16(mlx5r_umr_get_xlt_octo(size)); 553 umr->bsf_octowords = cpu_to_be16(MLX5_MKEY_BSF_OCTO_SIZE); 554 umr->mkey_mask = sig_mkey_mask(); 555} 556 557static int set_pi_umr_wr(const struct ib_send_wr *send_wr, 558 struct mlx5_ib_qp *qp, void **seg, int *size, 559 void **cur_edge) 560{ 561 const struct ib_reg_wr *wr = reg_wr(send_wr); 562 struct mlx5_ib_mr *sig_mr = to_mmr(wr->mr); 563 struct mlx5_ib_mr *pi_mr = sig_mr->pi_mr; 564 struct ib_sig_attrs *sig_attrs = sig_mr->ibmr.sig_attrs; 565 u32 pdn = to_mpd(qp->ibqp.pd)->pdn; 566 u32 xlt_size; 567 int region_len, ret; 568 569 if (unlikely(send_wr->num_sge != 0) || 570 unlikely(wr->access & IB_ACCESS_REMOTE_ATOMIC) || 571 unlikely(!sig_mr->sig) || unlikely(!qp->ibqp.integrity_en) || 572 unlikely(!sig_mr->sig->sig_status_checked)) 573 return -EINVAL; 574 575 /* length of the protected region, data + protection */ 576 region_len = pi_mr->ibmr.length; 577 578 /** 579 * KLM octoword size - if protection was provided 580 * then we use strided block format (3 octowords), 581 * else we use single KLM (1 octoword) 582 **/ 583 if (sig_attrs->mem.sig_type != IB_SIG_TYPE_NONE) 584 xlt_size = 0x30; 585 else 586 xlt_size = sizeof(struct mlx5_klm); 587 588 set_sig_umr_segment(*seg, xlt_size); 589 *seg += sizeof(struct mlx5_wqe_umr_ctrl_seg); 590 *size += sizeof(struct mlx5_wqe_umr_ctrl_seg) / 16; 591 handle_post_send_edge(&qp->sq, seg, *size, cur_edge); 592 593 set_sig_mkey_segment(*seg, wr->mr, wr->access, xlt_size, region_len, 594 pdn); 595 *seg += sizeof(struct mlx5_mkey_seg); 596 *size += sizeof(struct mlx5_mkey_seg) / 16; 597 handle_post_send_edge(&qp->sq, seg, *size, cur_edge); 598 599 ret = set_sig_data_segment(send_wr, wr->mr, sig_attrs, qp, seg, size, 600 cur_edge); 601 if (ret) 602 return ret; 603 604 sig_mr->sig->sig_status_checked = false; 605 return 0; 606} 607 608static int set_psv_wr(struct ib_sig_domain *domain, 609 u32 psv_idx, void **seg, int *size) 610{ 611 struct mlx5_seg_set_psv *psv_seg = *seg; 612 613 memset(psv_seg, 0, sizeof(*psv_seg)); 614 psv_seg->psv_num = cpu_to_be32(psv_idx); 615 switch (domain->sig_type) { 616 case IB_SIG_TYPE_NONE: 617 break; 618 case IB_SIG_TYPE_T10_DIF: 619 psv_seg->transient_sig = cpu_to_be32(domain->sig.dif.bg << 16 | 620 domain->sig.dif.app_tag); 621 psv_seg->ref_tag = cpu_to_be32(domain->sig.dif.ref_tag); 622 break; 623 default: 624 pr_err("Bad signature type (%d) is given.\n", 625 domain->sig_type); 626 return -EINVAL; 627 } 628 629 *seg += sizeof(*psv_seg); 630 *size += sizeof(*psv_seg) / 16; 631 632 return 0; 633} 634 635static int set_reg_wr(struct mlx5_ib_qp *qp, 636 const struct ib_reg_wr *wr, 637 void **seg, int *size, void **cur_edge, 638 bool check_not_free) 639{ 640 struct mlx5_ib_mr *mr = to_mmr(wr->mr); 641 struct mlx5_ib_pd *pd = to_mpd(qp->ibqp.pd); 642 struct mlx5_ib_dev *dev = to_mdev(pd->ibpd.device); 643 int mr_list_size = (mr->mmkey.ndescs + mr->meta_ndescs) * mr->desc_size; 644 bool umr_inline = mr_list_size <= MLX5_IB_SQ_UMR_INLINE_THRESHOLD; 645 bool atomic = wr->access & IB_ACCESS_REMOTE_ATOMIC; 646 u8 flags = 0; 647 648 /* Matches access in mlx5_set_umr_free_mkey(). 649 * Relaxed Ordering is set implicitly in mlx5_set_umr_free_mkey() and 650 * kernel ULPs are not aware of it, so we don't set it here. 651 */ 652 if (!mlx5r_umr_can_reconfig(dev, 0, wr->access)) { 653 mlx5_ib_warn( 654 to_mdev(qp->ibqp.device), 655 "Fast update for MR access flags is not possible\n"); 656 return -EINVAL; 657 } 658 659 if (unlikely(wr->wr.send_flags & IB_SEND_INLINE)) { 660 mlx5_ib_warn(to_mdev(qp->ibqp.device), 661 "Invalid IB_SEND_INLINE send flag\n"); 662 return -EINVAL; 663 } 664 665 if (check_not_free) 666 flags |= MLX5_UMR_CHECK_NOT_FREE; 667 if (umr_inline) 668 flags |= MLX5_UMR_INLINE; 669 670 set_reg_umr_seg(*seg, mr, flags, atomic); 671 *seg += sizeof(struct mlx5_wqe_umr_ctrl_seg); 672 *size += sizeof(struct mlx5_wqe_umr_ctrl_seg) / 16; 673 handle_post_send_edge(&qp->sq, seg, *size, cur_edge); 674 675 set_reg_mkey_seg(*seg, mr, wr->key, wr->access); 676 *seg += sizeof(struct mlx5_mkey_seg); 677 *size += sizeof(struct mlx5_mkey_seg) / 16; 678 handle_post_send_edge(&qp->sq, seg, *size, cur_edge); 679 680 if (umr_inline) { 681 mlx5r_memcpy_send_wqe(&qp->sq, cur_edge, seg, size, mr->descs, 682 mr_list_size); 683 *size = ALIGN(*size, MLX5_SEND_WQE_BB >> 4); 684 } else { 685 set_reg_data_seg(*seg, mr, pd); 686 *seg += sizeof(struct mlx5_wqe_data_seg); 687 *size += (sizeof(struct mlx5_wqe_data_seg) / 16); 688 } 689 return 0; 690} 691 692static void set_linv_wr(struct mlx5_ib_qp *qp, void **seg, int *size, 693 void **cur_edge) 694{ 695 set_linv_umr_seg(*seg); 696 *seg += sizeof(struct mlx5_wqe_umr_ctrl_seg); 697 *size += sizeof(struct mlx5_wqe_umr_ctrl_seg) / 16; 698 handle_post_send_edge(&qp->sq, seg, *size, cur_edge); 699 set_linv_mkey_seg(*seg); 700 *seg += sizeof(struct mlx5_mkey_seg); 701 *size += sizeof(struct mlx5_mkey_seg) / 16; 702 handle_post_send_edge(&qp->sq, seg, *size, cur_edge); 703} 704 705static void dump_wqe(struct mlx5_ib_qp *qp, u32 idx, int size_16) 706{ 707 __be32 *p = NULL; 708 int i, j; 709 710 pr_debug("dump WQE index %u:\n", idx); 711 for (i = 0, j = 0; i < size_16 * 4; i += 4, j += 4) { 712 if ((i & 0xf) == 0) { 713 p = mlx5_frag_buf_get_wqe(&qp->sq.fbc, idx); 714 pr_debug("WQBB at %p:\n", (void *)p); 715 j = 0; 716 idx = (idx + 1) & (qp->sq.wqe_cnt - 1); 717 } 718 pr_debug("%08x %08x %08x %08x\n", be32_to_cpu(p[j]), 719 be32_to_cpu(p[j + 1]), be32_to_cpu(p[j + 2]), 720 be32_to_cpu(p[j + 3])); 721 } 722} 723 724int mlx5r_begin_wqe(struct mlx5_ib_qp *qp, void **seg, 725 struct mlx5_wqe_ctrl_seg **ctrl, unsigned int *idx, 726 int *size, void **cur_edge, int nreq, __be32 general_id, 727 bool send_signaled, bool solicited) 728{ 729 if (unlikely(mlx5r_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq))) 730 return -ENOMEM; 731 732 *idx = qp->sq.cur_post & (qp->sq.wqe_cnt - 1); 733 *seg = mlx5_frag_buf_get_wqe(&qp->sq.fbc, *idx); 734 *ctrl = *seg; 735 *(uint32_t *)(*seg + 8) = 0; 736 (*ctrl)->general_id = general_id; 737 (*ctrl)->fm_ce_se = qp->sq_signal_bits | 738 (send_signaled ? MLX5_WQE_CTRL_CQ_UPDATE : 0) | 739 (solicited ? MLX5_WQE_CTRL_SOLICITED : 0); 740 741 *seg += sizeof(**ctrl); 742 *size = sizeof(**ctrl) / 16; 743 *cur_edge = qp->sq.cur_edge; 744 745 return 0; 746} 747 748static int begin_wqe(struct mlx5_ib_qp *qp, void **seg, 749 struct mlx5_wqe_ctrl_seg **ctrl, 750 const struct ib_send_wr *wr, unsigned int *idx, int *size, 751 void **cur_edge, int nreq) 752{ 753 return mlx5r_begin_wqe(qp, seg, ctrl, idx, size, cur_edge, nreq, 754 send_ieth(wr), wr->send_flags & IB_SEND_SIGNALED, 755 wr->send_flags & IB_SEND_SOLICITED); 756} 757 758void mlx5r_finish_wqe(struct mlx5_ib_qp *qp, struct mlx5_wqe_ctrl_seg *ctrl, 759 void *seg, u8 size, void *cur_edge, unsigned int idx, 760 u64 wr_id, int nreq, u8 fence, u32 mlx5_opcode) 761{ 762 u8 opmod = 0; 763 764 ctrl->opmod_idx_opcode = cpu_to_be32(((u32)(qp->sq.cur_post) << 8) | 765 mlx5_opcode | ((u32)opmod << 24)); 766 ctrl->qpn_ds = cpu_to_be32(size | (qp->trans_qp.base.mqp.qpn << 8)); 767 ctrl->fm_ce_se |= fence; 768 if (unlikely(qp->flags_en & MLX5_QP_FLAG_SIGNATURE)) 769 ctrl->signature = wq_sig(ctrl); 770 771 qp->sq.wrid[idx] = wr_id; 772 qp->sq.w_list[idx].opcode = mlx5_opcode; 773 qp->sq.wqe_head[idx] = qp->sq.head + nreq; 774 qp->sq.cur_post += DIV_ROUND_UP(size * 16, MLX5_SEND_WQE_BB); 775 qp->sq.w_list[idx].next = qp->sq.cur_post; 776 777 /* We save the edge which was possibly updated during the WQE 778 * construction, into SQ's cache. 779 */ 780 seg = PTR_ALIGN(seg, MLX5_SEND_WQE_BB); 781 qp->sq.cur_edge = (unlikely(seg == cur_edge)) ? 782 get_sq_edge(&qp->sq, qp->sq.cur_post & 783 (qp->sq.wqe_cnt - 1)) : 784 cur_edge; 785} 786 787static void handle_rdma_op(const struct ib_send_wr *wr, void **seg, int *size) 788{ 789 set_raddr_seg(*seg, rdma_wr(wr)->remote_addr, rdma_wr(wr)->rkey); 790 *seg += sizeof(struct mlx5_wqe_raddr_seg); 791 *size += sizeof(struct mlx5_wqe_raddr_seg) / 16; 792} 793 794static void handle_local_inv(struct mlx5_ib_qp *qp, const struct ib_send_wr *wr, 795 struct mlx5_wqe_ctrl_seg **ctrl, void **seg, 796 int *size, void **cur_edge, unsigned int idx) 797{ 798 qp->sq.wr_data[idx] = IB_WR_LOCAL_INV; 799 (*ctrl)->imm = cpu_to_be32(wr->ex.invalidate_rkey); 800 set_linv_wr(qp, seg, size, cur_edge); 801} 802 803static int handle_reg_mr(struct mlx5_ib_qp *qp, const struct ib_send_wr *wr, 804 struct mlx5_wqe_ctrl_seg **ctrl, void **seg, int *size, 805 void **cur_edge, unsigned int idx) 806{ 807 qp->sq.wr_data[idx] = IB_WR_REG_MR; 808 (*ctrl)->imm = cpu_to_be32(reg_wr(wr)->key); 809 return set_reg_wr(qp, reg_wr(wr), seg, size, cur_edge, true); 810} 811 812static int handle_psv(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp, 813 const struct ib_send_wr *wr, 814 struct mlx5_wqe_ctrl_seg **ctrl, void **seg, int *size, 815 void **cur_edge, unsigned int *idx, int nreq, 816 struct ib_sig_domain *domain, u32 psv_index, 817 u8 next_fence) 818{ 819 int err; 820 821 /* 822 * SET_PSV WQEs are not signaled and solicited on error. 823 */ 824 err = mlx5r_begin_wqe(qp, seg, ctrl, idx, size, cur_edge, nreq, 825 send_ieth(wr), false, true); 826 if (unlikely(err)) { 827 mlx5_ib_warn(dev, "\n"); 828 err = -ENOMEM; 829 goto out; 830 } 831 err = set_psv_wr(domain, psv_index, seg, size); 832 if (unlikely(err)) { 833 mlx5_ib_warn(dev, "\n"); 834 goto out; 835 } 836 mlx5r_finish_wqe(qp, *ctrl, *seg, *size, *cur_edge, *idx, wr->wr_id, 837 nreq, next_fence, MLX5_OPCODE_SET_PSV); 838 839out: 840 return err; 841} 842 843static int handle_reg_mr_integrity(struct mlx5_ib_dev *dev, 844 struct mlx5_ib_qp *qp, 845 const struct ib_send_wr *wr, 846 struct mlx5_wqe_ctrl_seg **ctrl, void **seg, 847 int *size, void **cur_edge, 848 unsigned int *idx, int nreq, u8 fence, 849 u8 next_fence) 850{ 851 struct mlx5_ib_mr *mr; 852 struct mlx5_ib_mr *pi_mr; 853 struct mlx5_ib_mr pa_pi_mr; 854 struct ib_sig_attrs *sig_attrs; 855 struct ib_reg_wr reg_pi_wr; 856 int err; 857 858 qp->sq.wr_data[*idx] = IB_WR_REG_MR_INTEGRITY; 859 860 mr = to_mmr(reg_wr(wr)->mr); 861 pi_mr = mr->pi_mr; 862 863 if (pi_mr) { 864 memset(®_pi_wr, 0, 865 sizeof(struct ib_reg_wr)); 866 867 reg_pi_wr.mr = &pi_mr->ibmr; 868 reg_pi_wr.access = reg_wr(wr)->access; 869 reg_pi_wr.key = pi_mr->ibmr.rkey; 870 871 (*ctrl)->imm = cpu_to_be32(reg_pi_wr.key); 872 /* UMR for data + prot registration */ 873 err = set_reg_wr(qp, ®_pi_wr, seg, size, cur_edge, false); 874 if (unlikely(err)) 875 goto out; 876 877 mlx5r_finish_wqe(qp, *ctrl, *seg, *size, *cur_edge, *idx, 878 wr->wr_id, nreq, fence, MLX5_OPCODE_UMR); 879 880 err = begin_wqe(qp, seg, ctrl, wr, idx, size, cur_edge, nreq); 881 if (unlikely(err)) { 882 mlx5_ib_warn(dev, "\n"); 883 err = -ENOMEM; 884 goto out; 885 } 886 } else { 887 memset(&pa_pi_mr, 0, sizeof(struct mlx5_ib_mr)); 888 /* No UMR, use local_dma_lkey */ 889 pa_pi_mr.ibmr.lkey = mr->ibmr.pd->local_dma_lkey; 890 pa_pi_mr.mmkey.ndescs = mr->mmkey.ndescs; 891 pa_pi_mr.data_length = mr->data_length; 892 pa_pi_mr.data_iova = mr->data_iova; 893 if (mr->meta_ndescs) { 894 pa_pi_mr.meta_ndescs = mr->meta_ndescs; 895 pa_pi_mr.meta_length = mr->meta_length; 896 pa_pi_mr.pi_iova = mr->pi_iova; 897 } 898 899 pa_pi_mr.ibmr.length = mr->ibmr.length; 900 mr->pi_mr = &pa_pi_mr; 901 } 902 (*ctrl)->imm = cpu_to_be32(mr->ibmr.rkey); 903 /* UMR for sig MR */ 904 err = set_pi_umr_wr(wr, qp, seg, size, cur_edge); 905 if (unlikely(err)) { 906 mlx5_ib_warn(dev, "\n"); 907 goto out; 908 } 909 mlx5r_finish_wqe(qp, *ctrl, *seg, *size, *cur_edge, *idx, wr->wr_id, 910 nreq, fence, MLX5_OPCODE_UMR); 911 912 sig_attrs = mr->ibmr.sig_attrs; 913 err = handle_psv(dev, qp, wr, ctrl, seg, size, cur_edge, idx, nreq, 914 &sig_attrs->mem, mr->sig->psv_memory.psv_idx, 915 next_fence); 916 if (unlikely(err)) 917 goto out; 918 919 err = handle_psv(dev, qp, wr, ctrl, seg, size, cur_edge, idx, nreq, 920 &sig_attrs->wire, mr->sig->psv_wire.psv_idx, 921 next_fence); 922 if (unlikely(err)) 923 goto out; 924 925 qp->next_fence = MLX5_FENCE_MODE_INITIATOR_SMALL; 926 927out: 928 return err; 929} 930 931static int handle_qpt_rc(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp, 932 const struct ib_send_wr *wr, 933 struct mlx5_wqe_ctrl_seg **ctrl, void **seg, int *size, 934 void **cur_edge, unsigned int *idx, int nreq, u8 fence, 935 u8 next_fence, int *num_sge) 936{ 937 int err = 0; 938 939 switch (wr->opcode) { 940 case IB_WR_RDMA_READ: 941 case IB_WR_RDMA_WRITE: 942 case IB_WR_RDMA_WRITE_WITH_IMM: 943 handle_rdma_op(wr, seg, size); 944 break; 945 946 case IB_WR_ATOMIC_CMP_AND_SWP: 947 case IB_WR_ATOMIC_FETCH_AND_ADD: 948 case IB_WR_MASKED_ATOMIC_CMP_AND_SWP: 949 mlx5_ib_warn(dev, "Atomic operations are not supported yet\n"); 950 err = -EOPNOTSUPP; 951 goto out; 952 953 case IB_WR_LOCAL_INV: 954 handle_local_inv(qp, wr, ctrl, seg, size, cur_edge, *idx); 955 *num_sge = 0; 956 break; 957 958 case IB_WR_REG_MR: 959 err = handle_reg_mr(qp, wr, ctrl, seg, size, cur_edge, *idx); 960 if (unlikely(err)) 961 goto out; 962 *num_sge = 0; 963 break; 964 965 case IB_WR_REG_MR_INTEGRITY: 966 err = handle_reg_mr_integrity(dev, qp, wr, ctrl, seg, size, 967 cur_edge, idx, nreq, fence, 968 next_fence); 969 if (unlikely(err)) 970 goto out; 971 *num_sge = 0; 972 break; 973 974 default: 975 break; 976 } 977 978out: 979 return err; 980} 981 982static void handle_qpt_uc(const struct ib_send_wr *wr, void **seg, int *size) 983{ 984 switch (wr->opcode) { 985 case IB_WR_RDMA_WRITE: 986 case IB_WR_RDMA_WRITE_WITH_IMM: 987 handle_rdma_op(wr, seg, size); 988 break; 989 default: 990 break; 991 } 992} 993 994static void handle_qpt_hw_gsi(struct mlx5_ib_qp *qp, 995 const struct ib_send_wr *wr, void **seg, 996 int *size, void **cur_edge) 997{ 998 set_datagram_seg(*seg, wr); 999 *seg += sizeof(struct mlx5_wqe_datagram_seg); 1000 *size += sizeof(struct mlx5_wqe_datagram_seg) / 16; 1001 handle_post_send_edge(&qp->sq, seg, *size, cur_edge); 1002} 1003 1004static void handle_qpt_ud(struct mlx5_ib_qp *qp, const struct ib_send_wr *wr, 1005 void **seg, int *size, void **cur_edge) 1006{ 1007 set_datagram_seg(*seg, wr); 1008 *seg += sizeof(struct mlx5_wqe_datagram_seg); 1009 *size += sizeof(struct mlx5_wqe_datagram_seg) / 16; 1010 handle_post_send_edge(&qp->sq, seg, *size, cur_edge); 1011 1012 /* handle qp that supports ud offload */ 1013 if (qp->flags & IB_QP_CREATE_IPOIB_UD_LSO) { 1014 struct mlx5_wqe_eth_pad *pad; 1015 1016 pad = *seg; 1017 memset(pad, 0, sizeof(struct mlx5_wqe_eth_pad)); 1018 *seg += sizeof(struct mlx5_wqe_eth_pad); 1019 *size += sizeof(struct mlx5_wqe_eth_pad) / 16; 1020 set_eth_seg(wr, qp, seg, size, cur_edge); 1021 handle_post_send_edge(&qp->sq, seg, *size, cur_edge); 1022 } 1023} 1024 1025void mlx5r_ring_db(struct mlx5_ib_qp *qp, unsigned int nreq, 1026 struct mlx5_wqe_ctrl_seg *ctrl) 1027{ 1028 struct mlx5_bf *bf = &qp->bf; 1029 1030 qp->sq.head += nreq; 1031 1032 /* Make sure that descriptors are written before 1033 * updating doorbell record and ringing the doorbell 1034 */ 1035 wmb(); 1036 1037 qp->db.db[MLX5_SND_DBR] = cpu_to_be32(qp->sq.cur_post); 1038 1039 /* Make sure doorbell record is visible to the HCA before 1040 * we hit doorbell. 1041 */ 1042 wmb(); 1043 1044 mlx5_write64((__be32 *)ctrl, bf->bfreg->map + bf->offset); 1045 /* Make sure doorbells don't leak out of SQ spinlock 1046 * and reach the HCA out of order. 1047 */ 1048 bf->offset ^= bf->buf_size; 1049} 1050 1051int mlx5_ib_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, 1052 const struct ib_send_wr **bad_wr, bool drain) 1053{ 1054 struct mlx5_wqe_ctrl_seg *ctrl = NULL; /* compiler warning */ 1055 struct mlx5_ib_dev *dev = to_mdev(ibqp->device); 1056 struct mlx5_core_dev *mdev = dev->mdev; 1057 struct mlx5_ib_qp *qp = to_mqp(ibqp); 1058 struct mlx5_wqe_xrc_seg *xrc; 1059 void *cur_edge; 1060 int size; 1061 unsigned long flags; 1062 unsigned int idx; 1063 int err = 0; 1064 int num_sge; 1065 void *seg; 1066 int nreq; 1067 int i; 1068 u8 next_fence = 0; 1069 u8 fence; 1070 1071 if (unlikely(mdev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR && 1072 !drain)) { 1073 *bad_wr = wr; 1074 return -EIO; 1075 } 1076 1077 if (qp->type == IB_QPT_GSI) 1078 return mlx5_ib_gsi_post_send(ibqp, wr, bad_wr); 1079 1080 spin_lock_irqsave(&qp->sq.lock, flags); 1081 1082 for (nreq = 0; wr; nreq++, wr = wr->next) { 1083 if (unlikely(wr->opcode >= ARRAY_SIZE(mlx5_ib_opcode))) { 1084 mlx5_ib_warn(dev, "\n"); 1085 err = -EINVAL; 1086 *bad_wr = wr; 1087 goto out; 1088 } 1089 1090 num_sge = wr->num_sge; 1091 if (unlikely(num_sge > qp->sq.max_gs)) { 1092 mlx5_ib_warn(dev, "\n"); 1093 err = -EINVAL; 1094 *bad_wr = wr; 1095 goto out; 1096 } 1097 1098 err = begin_wqe(qp, &seg, &ctrl, wr, &idx, &size, &cur_edge, 1099 nreq); 1100 if (err) { 1101 mlx5_ib_warn(dev, "\n"); 1102 err = -ENOMEM; 1103 *bad_wr = wr; 1104 goto out; 1105 } 1106 1107 if (wr->opcode == IB_WR_REG_MR || 1108 wr->opcode == IB_WR_REG_MR_INTEGRITY) { 1109 fence = dev->umr_fence; 1110 next_fence = MLX5_FENCE_MODE_INITIATOR_SMALL; 1111 } else { 1112 if (wr->send_flags & IB_SEND_FENCE) { 1113 if (qp->next_fence) 1114 fence = MLX5_FENCE_MODE_SMALL_AND_FENCE; 1115 else 1116 fence = MLX5_FENCE_MODE_FENCE; 1117 } else { 1118 fence = qp->next_fence; 1119 } 1120 } 1121 1122 switch (qp->type) { 1123 case IB_QPT_XRC_INI: 1124 xrc = seg; 1125 seg += sizeof(*xrc); 1126 size += sizeof(*xrc) / 16; 1127 fallthrough; 1128 case IB_QPT_RC: 1129 err = handle_qpt_rc(dev, qp, wr, &ctrl, &seg, &size, 1130 &cur_edge, &idx, nreq, fence, 1131 next_fence, &num_sge); 1132 if (unlikely(err)) { 1133 *bad_wr = wr; 1134 goto out; 1135 } else if (wr->opcode == IB_WR_REG_MR_INTEGRITY) { 1136 goto skip_psv; 1137 } 1138 break; 1139 1140 case IB_QPT_UC: 1141 handle_qpt_uc(wr, &seg, &size); 1142 break; 1143 case IB_QPT_SMI: 1144 if (unlikely(!dev->port_caps[qp->port - 1].has_smi)) { 1145 mlx5_ib_warn(dev, "Send SMP MADs is not allowed\n"); 1146 err = -EPERM; 1147 *bad_wr = wr; 1148 goto out; 1149 } 1150 fallthrough; 1151 case MLX5_IB_QPT_HW_GSI: 1152 handle_qpt_hw_gsi(qp, wr, &seg, &size, &cur_edge); 1153 break; 1154 case IB_QPT_UD: 1155 handle_qpt_ud(qp, wr, &seg, &size, &cur_edge); 1156 break; 1157 1158 default: 1159 break; 1160 } 1161 1162 if (wr->send_flags & IB_SEND_INLINE && num_sge) { 1163 err = set_data_inl_seg(qp, wr, &seg, &size, &cur_edge); 1164 if (unlikely(err)) { 1165 mlx5_ib_warn(dev, "\n"); 1166 *bad_wr = wr; 1167 goto out; 1168 } 1169 } else { 1170 for (i = 0; i < num_sge; i++) { 1171 handle_post_send_edge(&qp->sq, &seg, size, 1172 &cur_edge); 1173 if (unlikely(!wr->sg_list[i].length)) 1174 continue; 1175 1176 set_data_ptr_seg( 1177 (struct mlx5_wqe_data_seg *)seg, 1178 wr->sg_list + i); 1179 size += sizeof(struct mlx5_wqe_data_seg) / 16; 1180 seg += sizeof(struct mlx5_wqe_data_seg); 1181 } 1182 } 1183 1184 qp->next_fence = next_fence; 1185 mlx5r_finish_wqe(qp, ctrl, seg, size, cur_edge, idx, wr->wr_id, 1186 nreq, fence, mlx5_ib_opcode[wr->opcode]); 1187skip_psv: 1188 if (0) 1189 dump_wqe(qp, idx, size); 1190 } 1191 1192out: 1193 if (likely(nreq)) 1194 mlx5r_ring_db(qp, nreq, ctrl); 1195 1196 spin_unlock_irqrestore(&qp->sq.lock, flags); 1197 1198 return err; 1199} 1200 1201static void set_sig_seg(struct mlx5_rwqe_sig *sig, int max_gs) 1202{ 1203 sig->signature = calc_sig(sig, (max_gs + 1) << 2); 1204} 1205 1206int mlx5_ib_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, 1207 const struct ib_recv_wr **bad_wr, bool drain) 1208{ 1209 struct mlx5_ib_qp *qp = to_mqp(ibqp); 1210 struct mlx5_wqe_data_seg *scat; 1211 struct mlx5_rwqe_sig *sig; 1212 struct mlx5_ib_dev *dev = to_mdev(ibqp->device); 1213 struct mlx5_core_dev *mdev = dev->mdev; 1214 unsigned long flags; 1215 int err = 0; 1216 int nreq; 1217 int ind; 1218 int i; 1219 1220 if (unlikely(mdev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR && 1221 !drain)) { 1222 *bad_wr = wr; 1223 return -EIO; 1224 } 1225 1226 if (qp->type == IB_QPT_GSI) 1227 return mlx5_ib_gsi_post_recv(ibqp, wr, bad_wr); 1228 1229 spin_lock_irqsave(&qp->rq.lock, flags); 1230 1231 ind = qp->rq.head & (qp->rq.wqe_cnt - 1); 1232 1233 for (nreq = 0; wr; nreq++, wr = wr->next) { 1234 if (mlx5r_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) { 1235 err = -ENOMEM; 1236 *bad_wr = wr; 1237 goto out; 1238 } 1239 1240 if (unlikely(wr->num_sge > qp->rq.max_gs)) { 1241 err = -EINVAL; 1242 *bad_wr = wr; 1243 goto out; 1244 } 1245 1246 scat = mlx5_frag_buf_get_wqe(&qp->rq.fbc, ind); 1247 if (qp->flags_en & MLX5_QP_FLAG_SIGNATURE) 1248 scat++; 1249 1250 for (i = 0; i < wr->num_sge; i++) 1251 set_data_ptr_seg(scat + i, wr->sg_list + i); 1252 1253 if (i < qp->rq.max_gs) { 1254 scat[i].byte_count = 0; 1255 scat[i].lkey = dev->mkeys.terminate_scatter_list_mkey; 1256 scat[i].addr = 0; 1257 } 1258 1259 if (qp->flags_en & MLX5_QP_FLAG_SIGNATURE) { 1260 sig = (struct mlx5_rwqe_sig *)scat; 1261 set_sig_seg(sig, qp->rq.max_gs); 1262 } 1263 1264 qp->rq.wrid[ind] = wr->wr_id; 1265 1266 ind = (ind + 1) & (qp->rq.wqe_cnt - 1); 1267 } 1268 1269out: 1270 if (likely(nreq)) { 1271 qp->rq.head += nreq; 1272 1273 /* Make sure that descriptors are written before 1274 * doorbell record. 1275 */ 1276 wmb(); 1277 1278 *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff); 1279 } 1280 1281 spin_unlock_irqrestore(&qp->rq.lock, flags); 1282 1283 return err; 1284} 1285