1 /* 2 * Copyright (c) 2006, 2007, 2008, 2009 QLogic Corporation. All rights reserved. 3 * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the 9 * OpenIB.org BSD license below: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * - Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34 #include <rdma/ib_smi.h> 35 #include <rdma/ib_verbs.h> 36 37 #include "qib.h" 38 #include "qib_mad.h" 39 40 /** 41 * qib_ud_loopback - handle send on loopback QPs 42 * @sqp: the sending QP 43 * @swqe: the send work request 44 * 45 * This is called from qib_make_ud_req() to forward a WQE addressed 46 * to the same HCA. 47 * Note that the receive interrupt handler may be calling qib_ud_rcv() 48 * while this is being called. 49 */ 50 static void qib_ud_loopback(struct rvt_qp *sqp, struct rvt_swqe *swqe) 51 { 52 struct qib_ibport *ibp = to_iport(sqp->ibqp.device, sqp->port_num); 53 struct qib_pportdata *ppd = ppd_from_ibp(ibp); 54 struct qib_devdata *dd = ppd->dd; 55 struct rvt_dev_info *rdi = &dd->verbs_dev.rdi; 56 struct rvt_qp *qp; 57 struct rdma_ah_attr *ah_attr; 58 unsigned long flags; 59 struct rvt_sge_state ssge; 60 struct rvt_sge *sge; 61 struct ib_wc wc; 62 u32 length; 63 enum ib_qp_type sqptype, dqptype; 64 65 rcu_read_lock(); 66 qp = rvt_lookup_qpn(rdi, &ibp->rvp, swqe->ud_wr.remote_qpn); 67 if (!qp) { 68 ibp->rvp.n_pkt_drops++; 69 goto drop; 70 } 71 72 sqptype = sqp->ibqp.qp_type == IB_QPT_GSI ? 73 IB_QPT_UD : sqp->ibqp.qp_type; 74 dqptype = qp->ibqp.qp_type == IB_QPT_GSI ? 75 IB_QPT_UD : qp->ibqp.qp_type; 76 77 if (dqptype != sqptype || 78 !(ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK)) { 79 ibp->rvp.n_pkt_drops++; 80 goto drop; 81 } 82 83 ah_attr = &ibah_to_rvtah(swqe->ud_wr.ah)->attr; 84 ppd = ppd_from_ibp(ibp); 85 86 if (qp->ibqp.qp_num > 1) { 87 u16 pkey1; 88 u16 pkey2; 89 u16 lid; 90 91 pkey1 = qib_get_pkey(ibp, sqp->s_pkey_index); 92 pkey2 = qib_get_pkey(ibp, qp->s_pkey_index); 93 if (unlikely(!qib_pkey_ok(pkey1, pkey2))) { 94 lid = ppd->lid | (rdma_ah_get_path_bits(ah_attr) & 95 ((1 << ppd->lmc) - 1)); 96 qib_bad_pkey(ibp, pkey1, 97 rdma_ah_get_sl(ah_attr), 98 sqp->ibqp.qp_num, qp->ibqp.qp_num, 99 cpu_to_be16(lid), 100 cpu_to_be16(rdma_ah_get_dlid(ah_attr))); 101 goto drop; 102 } 103 } 104 105 /* 106 * Check that the qkey matches (except for QP0, see 9.6.1.4.1). 107 * Qkeys with the high order bit set mean use the 108 * qkey from the QP context instead of the WR (see 10.2.5). 109 */ 110 if (qp->ibqp.qp_num) { 111 u32 qkey; 112 113 qkey = (int)swqe->ud_wr.remote_qkey < 0 ? 114 sqp->qkey : swqe->ud_wr.remote_qkey; 115 if (unlikely(qkey != qp->qkey)) 116 goto drop; 117 } 118 119 /* 120 * A GRH is expected to precede the data even if not 121 * present on the wire. 122 */ 123 length = swqe->length; 124 memset(&wc, 0, sizeof(wc)); 125 wc.byte_len = length + sizeof(struct ib_grh); 126 127 if (swqe->wr.opcode == IB_WR_SEND_WITH_IMM) { 128 wc.wc_flags = IB_WC_WITH_IMM; 129 wc.ex.imm_data = swqe->wr.ex.imm_data; 130 } 131 132 spin_lock_irqsave(&qp->r_lock, flags); 133 134 /* 135 * Get the next work request entry to find where to put the data. 136 */ 137 if (qp->r_flags & RVT_R_REUSE_SGE) 138 qp->r_flags &= ~RVT_R_REUSE_SGE; 139 else { 140 int ret; 141 142 ret = rvt_get_rwqe(qp, false); 143 if (ret < 0) { 144 rvt_rc_error(qp, IB_WC_LOC_QP_OP_ERR); 145 goto bail_unlock; 146 } 147 if (!ret) { 148 if (qp->ibqp.qp_num == 0) 149 ibp->rvp.n_vl15_dropped++; 150 goto bail_unlock; 151 } 152 } 153 /* Silently drop packets which are too big. */ 154 if (unlikely(wc.byte_len > qp->r_len)) { 155 qp->r_flags |= RVT_R_REUSE_SGE; 156 ibp->rvp.n_pkt_drops++; 157 goto bail_unlock; 158 } 159 160 if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) { 161 struct ib_grh grh; 162 const struct ib_global_route *grd = rdma_ah_read_grh(ah_attr); 163 164 qib_make_grh(ibp, &grh, grd, 0, 0); 165 rvt_copy_sge(qp, &qp->r_sge, &grh, 166 sizeof(grh), true, false); 167 wc.wc_flags |= IB_WC_GRH; 168 } else 169 rvt_skip_sge(&qp->r_sge, sizeof(struct ib_grh), true); 170 ssge.sg_list = swqe->sg_list + 1; 171 ssge.sge = *swqe->sg_list; 172 ssge.num_sge = swqe->wr.num_sge; 173 sge = &ssge.sge; 174 while (length) { 175 u32 len = rvt_get_sge_length(sge, length); 176 177 rvt_copy_sge(qp, &qp->r_sge, sge->vaddr, len, true, false); 178 sge->vaddr += len; 179 sge->length -= len; 180 sge->sge_length -= len; 181 if (sge->sge_length == 0) { 182 if (--ssge.num_sge) 183 *sge = *ssge.sg_list++; 184 } else if (sge->length == 0 && sge->mr->lkey) { 185 if (++sge->n >= RVT_SEGSZ) { 186 if (++sge->m >= sge->mr->mapsz) 187 break; 188 sge->n = 0; 189 } 190 sge->vaddr = 191 sge->mr->map[sge->m]->segs[sge->n].vaddr; 192 sge->length = 193 sge->mr->map[sge->m]->segs[sge->n].length; 194 } 195 length -= len; 196 } 197 rvt_put_ss(&qp->r_sge); 198 if (!test_and_clear_bit(RVT_R_WRID_VALID, &qp->r_aflags)) 199 goto bail_unlock; 200 wc.wr_id = qp->r_wr_id; 201 wc.status = IB_WC_SUCCESS; 202 wc.opcode = IB_WC_RECV; 203 wc.qp = &qp->ibqp; 204 wc.src_qp = sqp->ibqp.qp_num; 205 wc.pkey_index = qp->ibqp.qp_type == IB_QPT_GSI ? 206 swqe->ud_wr.pkey_index : 0; 207 wc.slid = ppd->lid | (rdma_ah_get_path_bits(ah_attr) & 208 ((1 << ppd->lmc) - 1)); 209 wc.sl = rdma_ah_get_sl(ah_attr); 210 wc.dlid_path_bits = rdma_ah_get_dlid(ah_attr) & ((1 << ppd->lmc) - 1); 211 wc.port_num = qp->port_num; 212 /* Signal completion event if the solicited bit is set. */ 213 rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc, 214 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 = &ibah_to_rvtah(wqe->ud_wr.ah)->attr; 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 wqe->ud_wr.pkey_index : 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(wqe->ud_wr.remote_qpn); 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] = cpu_to_be32((int)wqe->ud_wr.remote_qkey < 0 ? 382 qp->qkey : wqe->ud_wr.remote_qkey); 383 ohdr->u.ud.deth[1] = cpu_to_be32(qp->ibqp.qp_num); 384 385 done: 386 return 1; 387 bail: 388 qp->s_flags &= ~RVT_S_BUSY; 389 return ret; 390 } 391 392 static unsigned qib_lookup_pkey(struct qib_ibport *ibp, u16 pkey) 393 { 394 struct qib_pportdata *ppd = ppd_from_ibp(ibp); 395 struct qib_devdata *dd = ppd->dd; 396 unsigned ctxt = ppd->hw_pidx; 397 unsigned i; 398 399 pkey &= 0x7fff; /* remove limited/full membership bit */ 400 401 for (i = 0; i < ARRAY_SIZE(dd->rcd[ctxt]->pkeys); ++i) 402 if ((dd->rcd[ctxt]->pkeys[i] & 0x7fff) == pkey) 403 return i; 404 405 /* 406 * Should not get here, this means hardware failed to validate pkeys. 407 * Punt and return index 0. 408 */ 409 return 0; 410 } 411 412 /** 413 * qib_ud_rcv - receive an incoming UD packet 414 * @ibp: the port the packet came in on 415 * @hdr: the packet header 416 * @has_grh: true if the packet has a GRH 417 * @data: the packet data 418 * @tlen: the packet length 419 * @qp: the QP the packet came on 420 * 421 * This is called from qib_qp_rcv() to process an incoming UD packet 422 * for the given QP. 423 * Called at interrupt level. 424 */ 425 void qib_ud_rcv(struct qib_ibport *ibp, struct ib_header *hdr, 426 int has_grh, void *data, u32 tlen, struct rvt_qp *qp) 427 { 428 struct ib_other_headers *ohdr; 429 int opcode; 430 u32 hdrsize; 431 u32 pad; 432 struct ib_wc wc; 433 u32 qkey; 434 u32 src_qp; 435 u16 dlid; 436 437 /* Check for GRH */ 438 if (!has_grh) { 439 ohdr = &hdr->u.oth; 440 hdrsize = 8 + 12 + 8; /* LRH + BTH + DETH */ 441 } else { 442 ohdr = &hdr->u.l.oth; 443 hdrsize = 8 + 40 + 12 + 8; /* LRH + GRH + BTH + DETH */ 444 } 445 qkey = be32_to_cpu(ohdr->u.ud.deth[0]); 446 src_qp = be32_to_cpu(ohdr->u.ud.deth[1]) & RVT_QPN_MASK; 447 448 /* 449 * Get the number of bytes the message was padded by 450 * and drop incomplete packets. 451 */ 452 pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3; 453 if (unlikely(tlen < (hdrsize + pad + 4))) 454 goto drop; 455 456 tlen -= hdrsize + pad + 4; 457 458 /* 459 * Check that the permissive LID is only used on QP0 460 * and the QKEY matches (see 9.6.1.4.1 and 9.6.1.5.1). 461 */ 462 if (qp->ibqp.qp_num) { 463 if (unlikely(hdr->lrh[1] == IB_LID_PERMISSIVE || 464 hdr->lrh[3] == IB_LID_PERMISSIVE)) 465 goto drop; 466 if (qp->ibqp.qp_num > 1) { 467 u16 pkey1, pkey2; 468 469 pkey1 = be32_to_cpu(ohdr->bth[0]); 470 pkey2 = qib_get_pkey(ibp, qp->s_pkey_index); 471 if (unlikely(!qib_pkey_ok(pkey1, pkey2))) { 472 qib_bad_pkey(ibp, 473 pkey1, 474 (be16_to_cpu(hdr->lrh[0]) >> 4) & 475 0xF, 476 src_qp, qp->ibqp.qp_num, 477 hdr->lrh[3], hdr->lrh[1]); 478 return; 479 } 480 } 481 if (unlikely(qkey != qp->qkey)) 482 return; 483 484 /* Drop invalid MAD packets (see 13.5.3.1). */ 485 if (unlikely(qp->ibqp.qp_num == 1 && 486 (tlen != 256 || 487 (be16_to_cpu(hdr->lrh[0]) >> 12) == 15))) 488 goto drop; 489 } else { 490 struct ib_smp *smp; 491 492 /* Drop invalid MAD packets (see 13.5.3.1). */ 493 if (tlen != 256 || (be16_to_cpu(hdr->lrh[0]) >> 12) != 15) 494 goto drop; 495 smp = (struct ib_smp *) data; 496 if ((hdr->lrh[1] == IB_LID_PERMISSIVE || 497 hdr->lrh[3] == IB_LID_PERMISSIVE) && 498 smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) 499 goto drop; 500 } 501 502 /* 503 * The opcode is in the low byte when its in network order 504 * (top byte when in host order). 505 */ 506 opcode = be32_to_cpu(ohdr->bth[0]) >> 24; 507 if (qp->ibqp.qp_num > 1 && 508 opcode == IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE) { 509 wc.ex.imm_data = ohdr->u.ud.imm_data; 510 wc.wc_flags = IB_WC_WITH_IMM; 511 } else if (opcode == IB_OPCODE_UD_SEND_ONLY) { 512 wc.ex.imm_data = 0; 513 wc.wc_flags = 0; 514 } else 515 goto drop; 516 517 /* 518 * A GRH is expected to precede the data even if not 519 * present on the wire. 520 */ 521 wc.byte_len = tlen + sizeof(struct ib_grh); 522 523 /* 524 * Get the next work request entry to find where to put the data. 525 */ 526 if (qp->r_flags & RVT_R_REUSE_SGE) 527 qp->r_flags &= ~RVT_R_REUSE_SGE; 528 else { 529 int ret; 530 531 ret = rvt_get_rwqe(qp, false); 532 if (ret < 0) { 533 rvt_rc_error(qp, IB_WC_LOC_QP_OP_ERR); 534 return; 535 } 536 if (!ret) { 537 if (qp->ibqp.qp_num == 0) 538 ibp->rvp.n_vl15_dropped++; 539 return; 540 } 541 } 542 /* Silently drop packets which are too big. */ 543 if (unlikely(wc.byte_len > qp->r_len)) { 544 qp->r_flags |= RVT_R_REUSE_SGE; 545 goto drop; 546 } 547 if (has_grh) { 548 rvt_copy_sge(qp, &qp->r_sge, &hdr->u.l.grh, 549 sizeof(struct ib_grh), true, false); 550 wc.wc_flags |= IB_WC_GRH; 551 } else 552 rvt_skip_sge(&qp->r_sge, sizeof(struct ib_grh), true); 553 rvt_copy_sge(qp, &qp->r_sge, data, wc.byte_len - sizeof(struct ib_grh), 554 true, false); 555 rvt_put_ss(&qp->r_sge); 556 if (!test_and_clear_bit(RVT_R_WRID_VALID, &qp->r_aflags)) 557 return; 558 wc.wr_id = qp->r_wr_id; 559 wc.status = IB_WC_SUCCESS; 560 wc.opcode = IB_WC_RECV; 561 wc.vendor_err = 0; 562 wc.qp = &qp->ibqp; 563 wc.src_qp = src_qp; 564 wc.pkey_index = qp->ibqp.qp_type == IB_QPT_GSI ? 565 qib_lookup_pkey(ibp, be32_to_cpu(ohdr->bth[0])) : 0; 566 wc.slid = be16_to_cpu(hdr->lrh[3]); 567 wc.sl = (be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF; 568 dlid = be16_to_cpu(hdr->lrh[1]); 569 /* 570 * Save the LMC lower bits if the destination LID is a unicast LID. 571 */ 572 wc.dlid_path_bits = dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE) ? 0 : 573 dlid & ((1 << ppd_from_ibp(ibp)->lmc) - 1); 574 wc.port_num = qp->port_num; 575 /* Signal completion event if the solicited bit is set. */ 576 rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc, 577 ib_bth_is_solicited(ohdr)); 578 return; 579 580 drop: 581 ibp->rvp.n_pkt_drops++; 582 } 583