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 36#include "qib.h" 37#include "qib_mad.h" 38 39/** 40 * qib_ud_loopback - handle send on loopback QPs 41 * @sqp: the sending QP 42 * @swqe: the send work request 43 * 44 * This is called from qib_make_ud_req() to forward a WQE addressed 45 * to the same HCA. 46 * Note that the receive interrupt handler may be calling qib_ud_rcv() 47 * while this is being called. 48 */ 49static void qib_ud_loopback(struct qib_qp *sqp, struct qib_swqe *swqe) 50{ 51 struct qib_ibport *ibp = to_iport(sqp->ibqp.device, sqp->port_num); 52 struct qib_pportdata *ppd; 53 struct qib_qp *qp; 54 struct ib_ah_attr *ah_attr; 55 unsigned long flags; 56 struct qib_sge_state ssge; 57 struct qib_sge *sge; 58 struct ib_wc wc; 59 u32 length; 60 61 qp = qib_lookup_qpn(ibp, swqe->wr.wr.ud.remote_qpn); 62 if (!qp) { 63 ibp->n_pkt_drops++; 64 return; 65 } 66 if (qp->ibqp.qp_type != sqp->ibqp.qp_type || 67 !(ib_qib_state_ops[qp->state] & QIB_PROCESS_RECV_OK)) { 68 ibp->n_pkt_drops++; 69 goto drop; 70 } 71 72 ah_attr = &to_iah(swqe->wr.wr.ud.ah)->attr; 73 ppd = ppd_from_ibp(ibp); 74 75 if (qp->ibqp.qp_num > 1) { 76 u16 pkey1; 77 u16 pkey2; 78 u16 lid; 79 80 pkey1 = qib_get_pkey(ibp, sqp->s_pkey_index); 81 pkey2 = qib_get_pkey(ibp, qp->s_pkey_index); 82 if (unlikely(!qib_pkey_ok(pkey1, pkey2))) { 83 lid = ppd->lid | (ah_attr->src_path_bits & 84 ((1 << ppd->lmc) - 1)); 85 qib_bad_pqkey(ibp, IB_NOTICE_TRAP_BAD_PKEY, pkey1, 86 ah_attr->sl, 87 sqp->ibqp.qp_num, qp->ibqp.qp_num, 88 cpu_to_be16(lid), 89 cpu_to_be16(ah_attr->dlid)); 90 goto drop; 91 } 92 } 93 94 /* 95 * Check that the qkey matches (except for QP0, see 9.6.1.4.1). 96 * Qkeys with the high order bit set mean use the 97 * qkey from the QP context instead of the WR (see 10.2.5). 98 */ 99 if (qp->ibqp.qp_num) { 100 u32 qkey; 101 102 qkey = (int)swqe->wr.wr.ud.remote_qkey < 0 ? 103 sqp->qkey : swqe->wr.wr.ud.remote_qkey; 104 if (unlikely(qkey != qp->qkey)) { 105 u16 lid; 106 107 lid = ppd->lid | (ah_attr->src_path_bits & 108 ((1 << ppd->lmc) - 1)); 109 qib_bad_pqkey(ibp, IB_NOTICE_TRAP_BAD_QKEY, qkey, 110 ah_attr->sl, 111 sqp->ibqp.qp_num, qp->ibqp.qp_num, 112 cpu_to_be16(lid), 113 cpu_to_be16(ah_attr->dlid)); 114 goto drop; 115 } 116 } 117 118 /* 119 * A GRH is expected to preceed the data even if not 120 * present on the wire. 121 */ 122 length = swqe->length; 123 memset(&wc, 0, sizeof wc); 124 wc.byte_len = length + sizeof(struct ib_grh); 125 126 if (swqe->wr.opcode == IB_WR_SEND_WITH_IMM) { 127 wc.wc_flags = IB_WC_WITH_IMM; 128 wc.ex.imm_data = swqe->wr.ex.imm_data; 129 } 130 131 spin_lock_irqsave(&qp->r_lock, flags); 132 133 /* 134 * Get the next work request entry to find where to put the data. 135 */ 136 if (qp->r_flags & QIB_R_REUSE_SGE) 137 qp->r_flags &= ~QIB_R_REUSE_SGE; 138 else { 139 int ret; 140 141 ret = qib_get_rwqe(qp, 0); 142 if (ret < 0) { 143 qib_rc_error(qp, IB_WC_LOC_QP_OP_ERR); 144 goto bail_unlock; 145 } 146 if (!ret) { 147 if (qp->ibqp.qp_num == 0) 148 ibp->n_vl15_dropped++; 149 goto bail_unlock; 150 } 151 } 152 /* Silently drop packets which are too big. */ 153 if (unlikely(wc.byte_len > qp->r_len)) { 154 qp->r_flags |= QIB_R_REUSE_SGE; 155 ibp->n_pkt_drops++; 156 goto bail_unlock; 157 } 158 159 if (ah_attr->ah_flags & IB_AH_GRH) { 160 qib_copy_sge(&qp->r_sge, &ah_attr->grh, 161 sizeof(struct ib_grh), 1); 162 wc.wc_flags |= IB_WC_GRH; 163 } else 164 qib_skip_sge(&qp->r_sge, sizeof(struct ib_grh), 1); 165 ssge.sg_list = swqe->sg_list + 1; 166 ssge.sge = *swqe->sg_list; 167 ssge.num_sge = swqe->wr.num_sge; 168 sge = &ssge.sge; 169 while (length) { 170 u32 len = sge->length; 171 172 if (len > length) 173 len = length; 174 if (len > sge->sge_length) 175 len = sge->sge_length; 176 BUG_ON(len == 0); 177 qib_copy_sge(&qp->r_sge, sge->vaddr, len, 1); 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 >= QIB_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 while (qp->r_sge.num_sge) { 198 atomic_dec(&qp->r_sge.sge.mr->refcount); 199 if (--qp->r_sge.num_sge) 200 qp->r_sge.sge = *qp->r_sge.sg_list++; 201 } 202 if (!test_and_clear_bit(QIB_R_WRID_VALID, &qp->r_aflags)) 203 goto bail_unlock; 204 wc.wr_id = qp->r_wr_id; 205 wc.status = IB_WC_SUCCESS; 206 wc.opcode = IB_WC_RECV; 207 wc.qp = &qp->ibqp; 208 wc.src_qp = sqp->ibqp.qp_num; 209 wc.pkey_index = qp->ibqp.qp_type == IB_QPT_GSI ? 210 swqe->wr.wr.ud.pkey_index : 0; 211 wc.slid = ppd->lid | (ah_attr->src_path_bits & ((1 << ppd->lmc) - 1)); 212 wc.sl = ah_attr->sl; 213 wc.dlid_path_bits = ah_attr->dlid & ((1 << ppd->lmc) - 1); 214 wc.port_num = qp->port_num; 215 /* Signal completion event if the solicited bit is set. */ 216 qib_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, 217 swqe->wr.send_flags & IB_SEND_SOLICITED); 218 ibp->n_loop_pkts++; 219bail_unlock: 220 spin_unlock_irqrestore(&qp->r_lock, flags); 221drop: 222 if (atomic_dec_and_test(&qp->refcount)) 223 wake_up(&qp->wait); 224} 225 226/** 227 * qib_make_ud_req - construct a UD request packet 228 * @qp: the QP 229 * 230 * Return 1 if constructed; otherwise, return 0. 231 */ 232int qib_make_ud_req(struct qib_qp *qp) 233{ 234 struct qib_other_headers *ohdr; 235 struct ib_ah_attr *ah_attr; 236 struct qib_pportdata *ppd; 237 struct qib_ibport *ibp; 238 struct qib_swqe *wqe; 239 unsigned long flags; 240 u32 nwords; 241 u32 extra_bytes; 242 u32 bth0; 243 u16 lrh0; 244 u16 lid; 245 int ret = 0; 246 int next_cur; 247 248 spin_lock_irqsave(&qp->s_lock, flags); 249 250 if (!(ib_qib_state_ops[qp->state] & QIB_PROCESS_NEXT_SEND_OK)) { 251 if (!(ib_qib_state_ops[qp->state] & QIB_FLUSH_SEND)) 252 goto bail; 253 /* We are in the error state, flush the work request. */ 254 if (qp->s_last == qp->s_head) 255 goto bail; 256 /* If DMAs are in progress, we can't flush immediately. */ 257 if (atomic_read(&qp->s_dma_busy)) { 258 qp->s_flags |= QIB_S_WAIT_DMA; 259 goto bail; 260 } 261 wqe = get_swqe_ptr(qp, qp->s_last); 262 qib_send_complete(qp, wqe, IB_WC_WR_FLUSH_ERR); 263 goto done; 264 } 265 266 if (qp->s_cur == qp->s_head) 267 goto bail; 268 269 wqe = get_swqe_ptr(qp, qp->s_cur); 270 next_cur = qp->s_cur + 1; 271 if (next_cur >= qp->s_size) 272 next_cur = 0; 273 274 /* Construct the header. */ 275 ibp = to_iport(qp->ibqp.device, qp->port_num); 276 ppd = ppd_from_ibp(ibp); 277 ah_attr = &to_iah(wqe->wr.wr.ud.ah)->attr; 278 if (ah_attr->dlid >= QIB_MULTICAST_LID_BASE) { 279 if (ah_attr->dlid != QIB_PERMISSIVE_LID) 280 ibp->n_multicast_xmit++; 281 else 282 ibp->n_unicast_xmit++; 283 } else { 284 ibp->n_unicast_xmit++; 285 lid = ah_attr->dlid & ~((1 << ppd->lmc) - 1); 286 if (unlikely(lid == ppd->lid)) { 287 if (atomic_read(&qp->s_dma_busy)) { 288 qp->s_flags |= QIB_S_WAIT_DMA; 289 goto bail; 290 } 291 qp->s_cur = next_cur; 292 spin_unlock_irqrestore(&qp->s_lock, flags); 293 qib_ud_loopback(qp, wqe); 294 spin_lock_irqsave(&qp->s_lock, flags); 295 qib_send_complete(qp, wqe, IB_WC_SUCCESS); 296 goto done; 297 } 298 } 299 300 qp->s_cur = next_cur; 301 extra_bytes = -wqe->length & 3; 302 nwords = (wqe->length + extra_bytes) >> 2; 303 304 /* header size in 32-bit words LRH+BTH+DETH = (8+12+8)/4. */ 305 qp->s_hdrwords = 7; 306 qp->s_cur_size = wqe->length; 307 qp->s_cur_sge = &qp->s_sge; 308 qp->s_srate = ah_attr->static_rate; 309 qp->s_wqe = wqe; 310 qp->s_sge.sge = wqe->sg_list[0]; 311 qp->s_sge.sg_list = wqe->sg_list + 1; 312 qp->s_sge.num_sge = wqe->wr.num_sge; 313 qp->s_sge.total_len = wqe->length; 314 315 if (ah_attr->ah_flags & IB_AH_GRH) { 316 /* Header size in 32-bit words. */ 317 qp->s_hdrwords += qib_make_grh(ibp, &qp->s_hdr.u.l.grh, 318 &ah_attr->grh, 319 qp->s_hdrwords, nwords); 320 lrh0 = QIB_LRH_GRH; 321 ohdr = &qp->s_hdr.u.l.oth; 322 /* 323 * Don't worry about sending to locally attached multicast 324 * QPs. It is unspecified by the spec. what happens. 325 */ 326 } else { 327 /* Header size in 32-bit words. */ 328 lrh0 = QIB_LRH_BTH; 329 ohdr = &qp->s_hdr.u.oth; 330 } 331 if (wqe->wr.opcode == IB_WR_SEND_WITH_IMM) { 332 qp->s_hdrwords++; 333 ohdr->u.ud.imm_data = wqe->wr.ex.imm_data; 334 bth0 = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE << 24; 335 } else 336 bth0 = IB_OPCODE_UD_SEND_ONLY << 24; 337 lrh0 |= ah_attr->sl << 4; 338 if (qp->ibqp.qp_type == IB_QPT_SMI) 339 lrh0 |= 0xF000; /* Set VL (see ch. 13.5.3.1) */ 340 else 341 lrh0 |= ibp->sl_to_vl[ah_attr->sl] << 12; 342 qp->s_hdr.lrh[0] = cpu_to_be16(lrh0); 343 qp->s_hdr.lrh[1] = cpu_to_be16(ah_attr->dlid); /* DEST LID */ 344 qp->s_hdr.lrh[2] = cpu_to_be16(qp->s_hdrwords + nwords + SIZE_OF_CRC); 345 lid = ppd->lid; 346 if (lid) { 347 lid |= ah_attr->src_path_bits & ((1 << ppd->lmc) - 1); 348 qp->s_hdr.lrh[3] = cpu_to_be16(lid); 349 } else 350 qp->s_hdr.lrh[3] = IB_LID_PERMISSIVE; 351 if (wqe->wr.send_flags & IB_SEND_SOLICITED) 352 bth0 |= IB_BTH_SOLICITED; 353 bth0 |= extra_bytes << 20; 354 bth0 |= qp->ibqp.qp_type == IB_QPT_SMI ? QIB_DEFAULT_P_KEY : 355 qib_get_pkey(ibp, qp->ibqp.qp_type == IB_QPT_GSI ? 356 wqe->wr.wr.ud.pkey_index : qp->s_pkey_index); 357 ohdr->bth[0] = cpu_to_be32(bth0); 358 /* 359 * Use the multicast QP if the destination LID is a multicast LID. 360 */ 361 ohdr->bth[1] = ah_attr->dlid >= QIB_MULTICAST_LID_BASE && 362 ah_attr->dlid != QIB_PERMISSIVE_LID ? 363 cpu_to_be32(QIB_MULTICAST_QPN) : 364 cpu_to_be32(wqe->wr.wr.ud.remote_qpn); 365 ohdr->bth[2] = cpu_to_be32(qp->s_next_psn++ & QIB_PSN_MASK); 366 /* 367 * Qkeys with the high order bit set mean use the 368 * qkey from the QP context instead of the WR (see 10.2.5). 369 */ 370 ohdr->u.ud.deth[0] = cpu_to_be32((int)wqe->wr.wr.ud.remote_qkey < 0 ? 371 qp->qkey : wqe->wr.wr.ud.remote_qkey); 372 ohdr->u.ud.deth[1] = cpu_to_be32(qp->ibqp.qp_num); 373 374done: 375 ret = 1; 376 goto unlock; 377 378bail: 379 qp->s_flags &= ~QIB_S_BUSY; 380unlock: 381 spin_unlock_irqrestore(&qp->s_lock, flags); 382 return ret; 383} 384 385static unsigned qib_lookup_pkey(struct qib_ibport *ibp, u16 pkey) 386{ 387 struct qib_pportdata *ppd = ppd_from_ibp(ibp); 388 struct qib_devdata *dd = ppd->dd; 389 unsigned ctxt = ppd->hw_pidx; 390 unsigned i; 391 392 pkey &= 0x7fff; /* remove limited/full membership bit */ 393 394 for (i = 0; i < ARRAY_SIZE(dd->rcd[ctxt]->pkeys); ++i) 395 if ((dd->rcd[ctxt]->pkeys[i] & 0x7fff) == pkey) 396 return i; 397 398 /* 399 * Should not get here, this means hardware failed to validate pkeys. 400 * Punt and return index 0. 401 */ 402 return 0; 403} 404 405/** 406 * qib_ud_rcv - receive an incoming UD packet 407 * @ibp: the port the packet came in on 408 * @hdr: the packet header 409 * @has_grh: true if the packet has a GRH 410 * @data: the packet data 411 * @tlen: the packet length 412 * @qp: the QP the packet came on 413 * 414 * This is called from qib_qp_rcv() to process an incoming UD packet 415 * for the given QP. 416 * Called at interrupt level. 417 */ 418void qib_ud_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr, 419 int has_grh, void *data, u32 tlen, struct qib_qp *qp) 420{ 421 struct qib_other_headers *ohdr; 422 int opcode; 423 u32 hdrsize; 424 u32 pad; 425 struct ib_wc wc; 426 u32 qkey; 427 u32 src_qp; 428 u16 dlid; 429 430 /* Check for GRH */ 431 if (!has_grh) { 432 ohdr = &hdr->u.oth; 433 hdrsize = 8 + 12 + 8; /* LRH + BTH + DETH */ 434 } else { 435 ohdr = &hdr->u.l.oth; 436 hdrsize = 8 + 40 + 12 + 8; /* LRH + GRH + BTH + DETH */ 437 } 438 qkey = be32_to_cpu(ohdr->u.ud.deth[0]); 439 src_qp = be32_to_cpu(ohdr->u.ud.deth[1]) & QIB_QPN_MASK; 440 441 /* Get the number of bytes the message was padded by. */ 442 pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3; 443 if (unlikely(tlen < (hdrsize + pad + 4))) { 444 /* Drop incomplete packets. */ 445 ibp->n_pkt_drops++; 446 goto bail; 447 } 448 tlen -= hdrsize + pad + 4; 449 450 /* 451 * Check that the permissive LID is only used on QP0 452 * and the QKEY matches (see 9.6.1.4.1 and 9.6.1.5.1). 453 */ 454 if (qp->ibqp.qp_num) { 455 if (unlikely(hdr->lrh[1] == IB_LID_PERMISSIVE || 456 hdr->lrh[3] == IB_LID_PERMISSIVE)) { 457 ibp->n_pkt_drops++; 458 goto bail; 459 } 460 if (qp->ibqp.qp_num > 1) { 461 u16 pkey1, pkey2; 462 463 pkey1 = be32_to_cpu(ohdr->bth[0]); 464 pkey2 = qib_get_pkey(ibp, qp->s_pkey_index); 465 if (unlikely(!qib_pkey_ok(pkey1, pkey2))) { 466 qib_bad_pqkey(ibp, IB_NOTICE_TRAP_BAD_PKEY, 467 pkey1, 468 (be16_to_cpu(hdr->lrh[0]) >> 4) & 469 0xF, 470 src_qp, qp->ibqp.qp_num, 471 hdr->lrh[3], hdr->lrh[1]); 472 goto bail; 473 } 474 } 475 if (unlikely(qkey != qp->qkey)) { 476 qib_bad_pqkey(ibp, IB_NOTICE_TRAP_BAD_QKEY, qkey, 477 (be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF, 478 src_qp, qp->ibqp.qp_num, 479 hdr->lrh[3], hdr->lrh[1]); 480 goto bail; 481 } 482 /* Drop invalid MAD packets (see 13.5.3.1). */ 483 if (unlikely(qp->ibqp.qp_num == 1 && 484 (tlen != 256 || 485 (be16_to_cpu(hdr->lrh[0]) >> 12) == 15))) { 486 ibp->n_pkt_drops++; 487 goto bail; 488 } 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 ibp->n_pkt_drops++; 495 goto bail; 496 } 497 smp = (struct ib_smp *) data; 498 if ((hdr->lrh[1] == IB_LID_PERMISSIVE || 499 hdr->lrh[3] == IB_LID_PERMISSIVE) && 500 smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { 501 ibp->n_pkt_drops++; 502 goto bail; 503 } 504 } 505 506 /* 507 * The opcode is in the low byte when its in network order 508 * (top byte when in host order). 509 */ 510 opcode = be32_to_cpu(ohdr->bth[0]) >> 24; 511 if (qp->ibqp.qp_num > 1 && 512 opcode == IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE) { 513 wc.ex.imm_data = ohdr->u.ud.imm_data; 514 wc.wc_flags = IB_WC_WITH_IMM; 515 hdrsize += sizeof(u32); 516 } else if (opcode == IB_OPCODE_UD_SEND_ONLY) { 517 wc.ex.imm_data = 0; 518 wc.wc_flags = 0; 519 } else { 520 ibp->n_pkt_drops++; 521 goto bail; 522 } 523 524 /* 525 * A GRH is expected to preceed the data even if not 526 * present on the wire. 527 */ 528 wc.byte_len = tlen + sizeof(struct ib_grh); 529 530 /* 531 * Get the next work request entry to find where to put the data. 532 */ 533 if (qp->r_flags & QIB_R_REUSE_SGE) 534 qp->r_flags &= ~QIB_R_REUSE_SGE; 535 else { 536 int ret; 537 538 ret = qib_get_rwqe(qp, 0); 539 if (ret < 0) { 540 qib_rc_error(qp, IB_WC_LOC_QP_OP_ERR); 541 return; 542 } 543 if (!ret) { 544 if (qp->ibqp.qp_num == 0) 545 ibp->n_vl15_dropped++; 546 return; 547 } 548 } 549 /* Silently drop packets which are too big. */ 550 if (unlikely(wc.byte_len > qp->r_len)) { 551 qp->r_flags |= QIB_R_REUSE_SGE; 552 ibp->n_pkt_drops++; 553 return; 554 } 555 if (has_grh) { 556 qib_copy_sge(&qp->r_sge, &hdr->u.l.grh, 557 sizeof(struct ib_grh), 1); 558 wc.wc_flags |= IB_WC_GRH; 559 } else 560 qib_skip_sge(&qp->r_sge, sizeof(struct ib_grh), 1); 561 qib_copy_sge(&qp->r_sge, data, wc.byte_len - sizeof(struct ib_grh), 1); 562 while (qp->r_sge.num_sge) { 563 atomic_dec(&qp->r_sge.sge.mr->refcount); 564 if (--qp->r_sge.num_sge) 565 qp->r_sge.sge = *qp->r_sge.sg_list++; 566 } 567 if (!test_and_clear_bit(QIB_R_WRID_VALID, &qp->r_aflags)) 568 return; 569 wc.wr_id = qp->r_wr_id; 570 wc.status = IB_WC_SUCCESS; 571 wc.opcode = IB_WC_RECV; 572 wc.vendor_err = 0; 573 wc.qp = &qp->ibqp; 574 wc.src_qp = src_qp; 575 wc.pkey_index = qp->ibqp.qp_type == IB_QPT_GSI ? 576 qib_lookup_pkey(ibp, be32_to_cpu(ohdr->bth[0])) : 0; 577 wc.slid = be16_to_cpu(hdr->lrh[3]); 578 wc.sl = (be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF; 579 dlid = be16_to_cpu(hdr->lrh[1]); 580 /* 581 * Save the LMC lower bits if the destination LID is a unicast LID. 582 */ 583 wc.dlid_path_bits = dlid >= QIB_MULTICAST_LID_BASE ? 0 : 584 dlid & ((1 << ppd_from_ibp(ibp)->lmc) - 1); 585 wc.port_num = qp->port_num; 586 /* Signal completion event if the solicited bit is set. */ 587 qib_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, 588 (ohdr->bth[0] & 589 cpu_to_be32(IB_BTH_SOLICITED)) != 0); 590bail:; 591} 592