1 /* 2 * Copyright (c) 2012 - 2019 Intel Corporation. All rights reserved. 3 * Copyright (c) 2006, 2007, 2008, 2009 QLogic Corporation. All rights reserved. 4 * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved. 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 */ 34 35 #include <rdma/ib_smi.h> 36 #include <rdma/ib_verbs.h> 37 38 #include "qib.h" 39 #include "qib_mad.h" 40 41 /** 42 * qib_ud_loopback - handle send on loopback QPs 43 * @sqp: the sending QP 44 * @swqe: the send work request 45 * 46 * This is called from qib_make_ud_req() to forward a WQE addressed 47 * to the same HCA. 48 * Note that the receive interrupt handler may be calling qib_ud_rcv() 49 * while this is being called. 50 */ 51 static void qib_ud_loopback(struct rvt_qp *sqp, struct rvt_swqe *swqe) 52 { 53 struct qib_ibport *ibp = to_iport(sqp->ibqp.device, sqp->port_num); 54 struct qib_pportdata *ppd = ppd_from_ibp(ibp); 55 struct qib_devdata *dd = ppd->dd; 56 struct rvt_dev_info *rdi = &dd->verbs_dev.rdi; 57 struct rvt_qp *qp; 58 struct rdma_ah_attr *ah_attr; 59 unsigned long flags; 60 struct rvt_sge_state ssge; 61 struct rvt_sge *sge; 62 struct ib_wc wc; 63 u32 length; 64 enum ib_qp_type sqptype, dqptype; 65 66 rcu_read_lock(); 67 qp = rvt_lookup_qpn(rdi, &ibp->rvp, rvt_get_swqe_remote_qpn(swqe)); 68 if (!qp) { 69 ibp->rvp.n_pkt_drops++; 70 goto drop; 71 } 72 73 sqptype = sqp->ibqp.qp_type == IB_QPT_GSI ? 74 IB_QPT_UD : sqp->ibqp.qp_type; 75 dqptype = qp->ibqp.qp_type == IB_QPT_GSI ? 76 IB_QPT_UD : qp->ibqp.qp_type; 77 78 if (dqptype != sqptype || 79 !(ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK)) { 80 ibp->rvp.n_pkt_drops++; 81 goto drop; 82 } 83 84 ah_attr = rvt_get_swqe_ah_attr(swqe); 85 ppd = ppd_from_ibp(ibp); 86 87 if (qp->ibqp.qp_num > 1) { 88 u16 pkey1; 89 u16 pkey2; 90 u16 lid; 91 92 pkey1 = qib_get_pkey(ibp, sqp->s_pkey_index); 93 pkey2 = qib_get_pkey(ibp, qp->s_pkey_index); 94 if (unlikely(!qib_pkey_ok(pkey1, pkey2))) { 95 lid = ppd->lid | (rdma_ah_get_path_bits(ah_attr) & 96 ((1 << ppd->lmc) - 1)); 97 qib_bad_pkey(ibp, pkey1, 98 rdma_ah_get_sl(ah_attr), 99 sqp->ibqp.qp_num, qp->ibqp.qp_num, 100 cpu_to_be16(lid), 101 cpu_to_be16(rdma_ah_get_dlid(ah_attr))); 102 goto drop; 103 } 104 } 105 106 /* 107 * Check that the qkey matches (except for QP0, see 9.6.1.4.1). 108 * Qkeys with the high order bit set mean use the 109 * qkey from the QP context instead of the WR (see 10.2.5). 110 */ 111 if (qp->ibqp.qp_num) { 112 u32 qkey; 113 114 qkey = (int)rvt_get_swqe_remote_qkey(swqe) < 0 ? 115 sqp->qkey : rvt_get_swqe_remote_qkey(swqe); 116 if (unlikely(qkey != qp->qkey)) 117 goto drop; 118 } 119 120 /* 121 * A GRH is expected to precede the data even if not 122 * present on the wire. 123 */ 124 length = swqe->length; 125 memset(&wc, 0, sizeof(wc)); 126 wc.byte_len = length + sizeof(struct ib_grh); 127 128 if (swqe->wr.opcode == IB_WR_SEND_WITH_IMM) { 129 wc.wc_flags = IB_WC_WITH_IMM; 130 wc.ex.imm_data = swqe->wr.ex.imm_data; 131 } 132 133 spin_lock_irqsave(&qp->r_lock, flags); 134 135 /* 136 * Get the next work request entry to find where to put the data. 137 */ 138 if (qp->r_flags & RVT_R_REUSE_SGE) 139 qp->r_flags &= ~RVT_R_REUSE_SGE; 140 else { 141 int ret; 142 143 ret = rvt_get_rwqe(qp, false); 144 if (ret < 0) { 145 rvt_rc_error(qp, IB_WC_LOC_QP_OP_ERR); 146 goto bail_unlock; 147 } 148 if (!ret) { 149 if (qp->ibqp.qp_num == 0) 150 ibp->rvp.n_vl15_dropped++; 151 goto bail_unlock; 152 } 153 } 154 /* Silently drop packets which are too big. */ 155 if (unlikely(wc.byte_len > qp->r_len)) { 156 qp->r_flags |= RVT_R_REUSE_SGE; 157 ibp->rvp.n_pkt_drops++; 158 goto bail_unlock; 159 } 160 161 if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) { 162 struct ib_grh grh; 163 const struct ib_global_route *grd = rdma_ah_read_grh(ah_attr); 164 165 qib_make_grh(ibp, &grh, grd, 0, 0); 166 rvt_copy_sge(qp, &qp->r_sge, &grh, 167 sizeof(grh), true, false); 168 wc.wc_flags |= IB_WC_GRH; 169 } else 170 rvt_skip_sge(&qp->r_sge, sizeof(struct ib_grh), true); 171 ssge.sg_list = swqe->sg_list + 1; 172 ssge.sge = *swqe->sg_list; 173 ssge.num_sge = swqe->wr.num_sge; 174 sge = &ssge.sge; 175 while (length) { 176 u32 len = rvt_get_sge_length(sge, length); 177 178 rvt_copy_sge(qp, &qp->r_sge, sge->vaddr, len, true, false); 179 sge->vaddr += len; 180 sge->length -= len; 181 sge->sge_length -= len; 182 if (sge->sge_length == 0) { 183 if (--ssge.num_sge) 184 *sge = *ssge.sg_list++; 185 } else if (sge->length == 0 && sge->mr->lkey) { 186 if (++sge->n >= RVT_SEGSZ) { 187 if (++sge->m >= sge->mr->mapsz) 188 break; 189 sge->n = 0; 190 } 191 sge->vaddr = 192 sge->mr->map[sge->m]->segs[sge->n].vaddr; 193 sge->length = 194 sge->mr->map[sge->m]->segs[sge->n].length; 195 } 196 length -= len; 197 } 198 rvt_put_ss(&qp->r_sge); 199 if (!test_and_clear_bit(RVT_R_WRID_VALID, &qp->r_aflags)) 200 goto bail_unlock; 201 wc.wr_id = qp->r_wr_id; 202 wc.status = IB_WC_SUCCESS; 203 wc.opcode = IB_WC_RECV; 204 wc.qp = &qp->ibqp; 205 wc.src_qp = sqp->ibqp.qp_num; 206 wc.pkey_index = qp->ibqp.qp_type == IB_QPT_GSI ? 207 rvt_get_swqe_pkey_index(swqe) : 0; 208 wc.slid = ppd->lid | (rdma_ah_get_path_bits(ah_attr) & 209 ((1 << ppd->lmc) - 1)); 210 wc.sl = rdma_ah_get_sl(ah_attr); 211 wc.dlid_path_bits = rdma_ah_get_dlid(ah_attr) & ((1 << ppd->lmc) - 1); 212 wc.port_num = qp->port_num; 213 /* Signal completion event if the solicited bit is set. */ 214 rvt_recv_cq(qp, &wc, swqe->wr.send_flags & IB_SEND_SOLICITED); 215 ibp->rvp.n_loop_pkts++; 216 bail_unlock: 217 spin_unlock_irqrestore(&qp->r_lock, flags); 218 drop: 219 rcu_read_unlock(); 220 } 221 222 /** 223 * qib_make_ud_req - construct a UD request packet 224 * @qp: the QP 225 * 226 * Assumes the s_lock is held. 227 * 228 * Return 1 if constructed; otherwise, return 0. 229 */ 230 int qib_make_ud_req(struct rvt_qp *qp, unsigned long *flags) 231 { 232 struct qib_qp_priv *priv = qp->priv; 233 struct ib_other_headers *ohdr; 234 struct rdma_ah_attr *ah_attr; 235 struct qib_pportdata *ppd; 236 struct qib_ibport *ibp; 237 struct rvt_swqe *wqe; 238 u32 nwords; 239 u32 extra_bytes; 240 u32 bth0; 241 u16 lrh0; 242 u16 lid; 243 int ret = 0; 244 int next_cur; 245 246 if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_NEXT_SEND_OK)) { 247 if (!(ib_rvt_state_ops[qp->state] & RVT_FLUSH_SEND)) 248 goto bail; 249 /* We are in the error state, flush the work request. */ 250 if (qp->s_last == READ_ONCE(qp->s_head)) 251 goto bail; 252 /* If DMAs are in progress, we can't flush immediately. */ 253 if (atomic_read(&priv->s_dma_busy)) { 254 qp->s_flags |= RVT_S_WAIT_DMA; 255 goto bail; 256 } 257 wqe = rvt_get_swqe_ptr(qp, qp->s_last); 258 rvt_send_complete(qp, wqe, IB_WC_WR_FLUSH_ERR); 259 goto done; 260 } 261 262 /* see post_one_send() */ 263 if (qp->s_cur == READ_ONCE(qp->s_head)) 264 goto bail; 265 266 wqe = rvt_get_swqe_ptr(qp, qp->s_cur); 267 next_cur = qp->s_cur + 1; 268 if (next_cur >= qp->s_size) 269 next_cur = 0; 270 271 /* Construct the header. */ 272 ibp = to_iport(qp->ibqp.device, qp->port_num); 273 ppd = ppd_from_ibp(ibp); 274 ah_attr = rvt_get_swqe_ah_attr(wqe); 275 if (rdma_ah_get_dlid(ah_attr) >= be16_to_cpu(IB_MULTICAST_LID_BASE)) { 276 if (rdma_ah_get_dlid(ah_attr) != 277 be16_to_cpu(IB_LID_PERMISSIVE)) 278 this_cpu_inc(ibp->pmastats->n_multicast_xmit); 279 else 280 this_cpu_inc(ibp->pmastats->n_unicast_xmit); 281 } else { 282 this_cpu_inc(ibp->pmastats->n_unicast_xmit); 283 lid = rdma_ah_get_dlid(ah_attr) & ~((1 << ppd->lmc) - 1); 284 if (unlikely(lid == ppd->lid)) { 285 unsigned long tflags = *flags; 286 /* 287 * If DMAs are in progress, we can't generate 288 * a completion for the loopback packet since 289 * it would be out of order. 290 * XXX Instead of waiting, we could queue a 291 * zero length descriptor so we get a callback. 292 */ 293 if (atomic_read(&priv->s_dma_busy)) { 294 qp->s_flags |= RVT_S_WAIT_DMA; 295 goto bail; 296 } 297 qp->s_cur = next_cur; 298 spin_unlock_irqrestore(&qp->s_lock, tflags); 299 qib_ud_loopback(qp, wqe); 300 spin_lock_irqsave(&qp->s_lock, tflags); 301 *flags = tflags; 302 rvt_send_complete(qp, wqe, IB_WC_SUCCESS); 303 goto done; 304 } 305 } 306 307 qp->s_cur = next_cur; 308 extra_bytes = -wqe->length & 3; 309 nwords = (wqe->length + extra_bytes) >> 2; 310 311 /* header size in 32-bit words LRH+BTH+DETH = (8+12+8)/4. */ 312 qp->s_hdrwords = 7; 313 qp->s_cur_size = wqe->length; 314 qp->s_cur_sge = &qp->s_sge; 315 qp->s_srate = rdma_ah_get_static_rate(ah_attr); 316 qp->s_wqe = wqe; 317 qp->s_sge.sge = wqe->sg_list[0]; 318 qp->s_sge.sg_list = wqe->sg_list + 1; 319 qp->s_sge.num_sge = wqe->wr.num_sge; 320 qp->s_sge.total_len = wqe->length; 321 322 if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) { 323 /* Header size in 32-bit words. */ 324 qp->s_hdrwords += qib_make_grh(ibp, &priv->s_hdr->u.l.grh, 325 rdma_ah_read_grh(ah_attr), 326 qp->s_hdrwords, nwords); 327 lrh0 = QIB_LRH_GRH; 328 ohdr = &priv->s_hdr->u.l.oth; 329 /* 330 * Don't worry about sending to locally attached multicast 331 * QPs. It is unspecified by the spec. what happens. 332 */ 333 } else { 334 /* Header size in 32-bit words. */ 335 lrh0 = QIB_LRH_BTH; 336 ohdr = &priv->s_hdr->u.oth; 337 } 338 if (wqe->wr.opcode == IB_WR_SEND_WITH_IMM) { 339 qp->s_hdrwords++; 340 ohdr->u.ud.imm_data = wqe->wr.ex.imm_data; 341 bth0 = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE << 24; 342 } else 343 bth0 = IB_OPCODE_UD_SEND_ONLY << 24; 344 lrh0 |= rdma_ah_get_sl(ah_attr) << 4; 345 if (qp->ibqp.qp_type == IB_QPT_SMI) 346 lrh0 |= 0xF000; /* Set VL (see ch. 13.5.3.1) */ 347 else 348 lrh0 |= ibp->sl_to_vl[rdma_ah_get_sl(ah_attr)] << 12; 349 priv->s_hdr->lrh[0] = cpu_to_be16(lrh0); 350 priv->s_hdr->lrh[1] = 351 cpu_to_be16(rdma_ah_get_dlid(ah_attr)); /* DEST LID */ 352 priv->s_hdr->lrh[2] = 353 cpu_to_be16(qp->s_hdrwords + nwords + SIZE_OF_CRC); 354 lid = ppd->lid; 355 if (lid) { 356 lid |= rdma_ah_get_path_bits(ah_attr) & 357 ((1 << ppd->lmc) - 1); 358 priv->s_hdr->lrh[3] = cpu_to_be16(lid); 359 } else 360 priv->s_hdr->lrh[3] = IB_LID_PERMISSIVE; 361 if (wqe->wr.send_flags & IB_SEND_SOLICITED) 362 bth0 |= IB_BTH_SOLICITED; 363 bth0 |= extra_bytes << 20; 364 bth0 |= qp->ibqp.qp_type == IB_QPT_SMI ? QIB_DEFAULT_P_KEY : 365 qib_get_pkey(ibp, qp->ibqp.qp_type == IB_QPT_GSI ? 366 rvt_get_swqe_pkey_index(wqe) : qp->s_pkey_index); 367 ohdr->bth[0] = cpu_to_be32(bth0); 368 /* 369 * Use the multicast QP if the destination LID is a multicast LID. 370 */ 371 ohdr->bth[1] = rdma_ah_get_dlid(ah_attr) >= 372 be16_to_cpu(IB_MULTICAST_LID_BASE) && 373 rdma_ah_get_dlid(ah_attr) != be16_to_cpu(IB_LID_PERMISSIVE) ? 374 cpu_to_be32(QIB_MULTICAST_QPN) : 375 cpu_to_be32(rvt_get_swqe_remote_qpn(wqe)); 376 ohdr->bth[2] = cpu_to_be32(wqe->psn & QIB_PSN_MASK); 377 /* 378 * Qkeys with the high order bit set mean use the 379 * qkey from the QP context instead of the WR (see 10.2.5). 380 */ 381 ohdr->u.ud.deth[0] = 382 cpu_to_be32((int)rvt_get_swqe_remote_qkey(wqe) < 0 ? qp->qkey : 383 rvt_get_swqe_remote_qkey(wqe)); 384 ohdr->u.ud.deth[1] = cpu_to_be32(qp->ibqp.qp_num); 385 386 done: 387 return 1; 388 bail: 389 qp->s_flags &= ~RVT_S_BUSY; 390 return ret; 391 } 392 393 static unsigned qib_lookup_pkey(struct qib_ibport *ibp, u16 pkey) 394 { 395 struct qib_pportdata *ppd = ppd_from_ibp(ibp); 396 struct qib_devdata *dd = ppd->dd; 397 unsigned ctxt = ppd->hw_pidx; 398 unsigned i; 399 400 pkey &= 0x7fff; /* remove limited/full membership bit */ 401 402 for (i = 0; i < ARRAY_SIZE(dd->rcd[ctxt]->pkeys); ++i) 403 if ((dd->rcd[ctxt]->pkeys[i] & 0x7fff) == pkey) 404 return i; 405 406 /* 407 * Should not get here, this means hardware failed to validate pkeys. 408 * Punt and return index 0. 409 */ 410 return 0; 411 } 412 413 /** 414 * qib_ud_rcv - receive an incoming UD packet 415 * @ibp: the port the packet came in on 416 * @hdr: the packet header 417 * @has_grh: true if the packet has a GRH 418 * @data: the packet data 419 * @tlen: the packet length 420 * @qp: the QP the packet came on 421 * 422 * This is called from qib_qp_rcv() to process an incoming UD packet 423 * for the given QP. 424 * Called at interrupt level. 425 */ 426 void qib_ud_rcv(struct qib_ibport *ibp, struct ib_header *hdr, 427 int has_grh, void *data, u32 tlen, struct rvt_qp *qp) 428 { 429 struct ib_other_headers *ohdr; 430 int opcode; 431 u32 hdrsize; 432 u32 pad; 433 struct ib_wc wc; 434 u32 qkey; 435 u32 src_qp; 436 u16 dlid; 437 438 /* Check for GRH */ 439 if (!has_grh) { 440 ohdr = &hdr->u.oth; 441 hdrsize = 8 + 12 + 8; /* LRH + BTH + DETH */ 442 } else { 443 ohdr = &hdr->u.l.oth; 444 hdrsize = 8 + 40 + 12 + 8; /* LRH + GRH + BTH + DETH */ 445 } 446 qkey = be32_to_cpu(ohdr->u.ud.deth[0]); 447 src_qp = be32_to_cpu(ohdr->u.ud.deth[1]) & RVT_QPN_MASK; 448 449 /* 450 * Get the number of bytes the message was padded by 451 * and drop incomplete packets. 452 */ 453 pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3; 454 if (unlikely(tlen < (hdrsize + pad + 4))) 455 goto drop; 456 457 tlen -= hdrsize + pad + 4; 458 459 /* 460 * Check that the permissive LID is only used on QP0 461 * and the QKEY matches (see 9.6.1.4.1 and 9.6.1.5.1). 462 */ 463 if (qp->ibqp.qp_num) { 464 if (unlikely(hdr->lrh[1] == IB_LID_PERMISSIVE || 465 hdr->lrh[3] == IB_LID_PERMISSIVE)) 466 goto drop; 467 if (qp->ibqp.qp_num > 1) { 468 u16 pkey1, pkey2; 469 470 pkey1 = be32_to_cpu(ohdr->bth[0]); 471 pkey2 = qib_get_pkey(ibp, qp->s_pkey_index); 472 if (unlikely(!qib_pkey_ok(pkey1, pkey2))) { 473 qib_bad_pkey(ibp, 474 pkey1, 475 (be16_to_cpu(hdr->lrh[0]) >> 4) & 476 0xF, 477 src_qp, qp->ibqp.qp_num, 478 hdr->lrh[3], hdr->lrh[1]); 479 return; 480 } 481 } 482 if (unlikely(qkey != qp->qkey)) 483 return; 484 485 /* Drop invalid MAD packets (see 13.5.3.1). */ 486 if (unlikely(qp->ibqp.qp_num == 1 && 487 (tlen != 256 || 488 (be16_to_cpu(hdr->lrh[0]) >> 12) == 15))) 489 goto drop; 490 } else { 491 struct ib_smp *smp; 492 493 /* Drop invalid MAD packets (see 13.5.3.1). */ 494 if (tlen != 256 || (be16_to_cpu(hdr->lrh[0]) >> 12) != 15) 495 goto drop; 496 smp = (struct ib_smp *) data; 497 if ((hdr->lrh[1] == IB_LID_PERMISSIVE || 498 hdr->lrh[3] == IB_LID_PERMISSIVE) && 499 smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) 500 goto drop; 501 } 502 503 /* 504 * The opcode is in the low byte when its in network order 505 * (top byte when in host order). 506 */ 507 opcode = be32_to_cpu(ohdr->bth[0]) >> 24; 508 if (qp->ibqp.qp_num > 1 && 509 opcode == IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE) { 510 wc.ex.imm_data = ohdr->u.ud.imm_data; 511 wc.wc_flags = IB_WC_WITH_IMM; 512 } else if (opcode == IB_OPCODE_UD_SEND_ONLY) { 513 wc.ex.imm_data = 0; 514 wc.wc_flags = 0; 515 } else 516 goto drop; 517 518 /* 519 * A GRH is expected to precede the data even if not 520 * present on the wire. 521 */ 522 wc.byte_len = tlen + sizeof(struct ib_grh); 523 524 /* 525 * Get the next work request entry to find where to put the data. 526 */ 527 if (qp->r_flags & RVT_R_REUSE_SGE) 528 qp->r_flags &= ~RVT_R_REUSE_SGE; 529 else { 530 int ret; 531 532 ret = rvt_get_rwqe(qp, false); 533 if (ret < 0) { 534 rvt_rc_error(qp, IB_WC_LOC_QP_OP_ERR); 535 return; 536 } 537 if (!ret) { 538 if (qp->ibqp.qp_num == 0) 539 ibp->rvp.n_vl15_dropped++; 540 return; 541 } 542 } 543 /* Silently drop packets which are too big. */ 544 if (unlikely(wc.byte_len > qp->r_len)) { 545 qp->r_flags |= RVT_R_REUSE_SGE; 546 goto drop; 547 } 548 if (has_grh) { 549 rvt_copy_sge(qp, &qp->r_sge, &hdr->u.l.grh, 550 sizeof(struct ib_grh), true, false); 551 wc.wc_flags |= IB_WC_GRH; 552 } else 553 rvt_skip_sge(&qp->r_sge, sizeof(struct ib_grh), true); 554 rvt_copy_sge(qp, &qp->r_sge, data, wc.byte_len - sizeof(struct ib_grh), 555 true, false); 556 rvt_put_ss(&qp->r_sge); 557 if (!test_and_clear_bit(RVT_R_WRID_VALID, &qp->r_aflags)) 558 return; 559 wc.wr_id = qp->r_wr_id; 560 wc.status = IB_WC_SUCCESS; 561 wc.opcode = IB_WC_RECV; 562 wc.vendor_err = 0; 563 wc.qp = &qp->ibqp; 564 wc.src_qp = src_qp; 565 wc.pkey_index = qp->ibqp.qp_type == IB_QPT_GSI ? 566 qib_lookup_pkey(ibp, be32_to_cpu(ohdr->bth[0])) : 0; 567 wc.slid = be16_to_cpu(hdr->lrh[3]); 568 wc.sl = (be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF; 569 dlid = be16_to_cpu(hdr->lrh[1]); 570 /* 571 * Save the LMC lower bits if the destination LID is a unicast LID. 572 */ 573 wc.dlid_path_bits = dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE) ? 0 : 574 dlid & ((1 << ppd_from_ibp(ibp)->lmc) - 1); 575 wc.port_num = qp->port_num; 576 /* Signal completion event if the solicited bit is set. */ 577 rvt_recv_cq(qp, &wc, ib_bth_is_solicited(ohdr)); 578 return; 579 580 drop: 581 ibp->rvp.n_pkt_drops++; 582 } 583