174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan/* 2e7eacd36865ae0707f5efae8e4dda421ffcd1b66Ralph Campbell * Copyright (c) 2006, 2007, 2008 QLogic Corporation. All rights reserved. 374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved. 474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * 574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * This software is available to you under a choice of one of two 674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * licenses. You may choose to be licensed under the terms of the GNU 774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * General Public License (GPL) Version 2, available from the file 874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * COPYING in the main directory of this source tree, or the 974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * OpenIB.org BSD license below: 1074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * 1174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * Redistribution and use in source and binary forms, with or 1274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * without modification, are permitted provided that the following 1374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * conditions are met: 1474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * 1574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * - Redistributions of source code must retain the above 1674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * copyright notice, this list of conditions and the following 1774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * disclaimer. 1874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * 1974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * - Redistributions in binary form must reproduce the above 2074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * copyright notice, this list of conditions and the following 2174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * disclaimer in the documentation and/or other materials 2274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * provided with the distribution. 2374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * 2474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 2574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 2674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 2774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 2874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 2974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 3074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 3174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * SOFTWARE. 3274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan */ 3374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 34d43c36dc6b357fa1806800f18aa30123c747a6d1Alexey Dobriyan#include <linux/sched.h> 3574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan#include <rdma/ib_smi.h> 3674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 3774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan#include "ipath_verbs.h" 38373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell#include "ipath_kernel.h" 39373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell 4074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan/** 4174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * ipath_ud_loopback - handle send on loopback QPs 424ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell * @sqp: the sending QP 434ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell * @swqe: the send work request 4474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * 454ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell * This is called from ipath_make_ud_req() to forward a WQE addressed 4674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * to the same HCA. 47373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell * Note that the receive interrupt handler may be calling ipath_ud_rcv() 48373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell * while this is being called. 4974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan */ 504ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbellstatic void ipath_ud_loopback(struct ipath_qp *sqp, struct ipath_swqe *swqe) 5174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan{ 5274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan struct ipath_ibdev *dev = to_idev(sqp->ibqp.device); 5374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan struct ipath_qp *qp; 5474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan struct ib_ah_attr *ah_attr; 5574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan unsigned long flags; 5674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan struct ipath_rq *rq; 5774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan struct ipath_srq *srq; 5874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan struct ipath_sge_state rsge; 5974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan struct ipath_sge *sge; 60373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell struct ipath_rwq *wq; 6174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan struct ipath_rwqe *wqe; 62373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell void (*handler)(struct ib_event *, void *); 634ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell struct ib_wc wc; 64373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell u32 tail; 65373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell u32 rlen; 664ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell u32 length; 6774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 684ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell qp = ipath_lookup_qpn(&dev->qp_table, swqe->wr.wr.ud.remote_qpn); 69e509be898d8937634437caa474b57ac12795e5bcRalph Campbell if (!qp || !(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_RECV_OK)) { 704ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell dev->n_pkt_drops++; 71e509be898d8937634437caa474b57ac12795e5bcRalph Campbell goto done; 724ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell } 734ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell 7474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* 7574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * Check that the qkey matches (except for QP0, see 9.6.1.4.1). 7674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * Qkeys with the high order bit set mean use the 7774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * qkey from the QP context instead of the WR (see 10.2.5). 7874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan */ 7974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan if (unlikely(qp->ibqp.qp_num && 804ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell ((int) swqe->wr.wr.ud.remote_qkey < 0 ? 814ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell sqp->qkey : swqe->wr.wr.ud.remote_qkey) != qp->qkey)) { 8274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* XXX OK to lose a count once in a while. */ 8374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan dev->qkey_violations++; 8474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan dev->n_pkt_drops++; 854ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell goto drop; 8674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } 8774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 8874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* 8925985edcedea6396277003854657b5f3cb31a628Lucas De Marchi * A GRH is expected to precede the data even if not 9074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * present on the wire. 9174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan */ 924ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell length = swqe->length; 93e509be898d8937634437caa474b57ac12795e5bcRalph Campbell memset(&wc, 0, sizeof wc); 944ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell wc.byte_len = length + sizeof(struct ib_grh); 9574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 964ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell if (swqe->wr.opcode == IB_WR_SEND_WITH_IMM) { 974ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell wc.wc_flags = IB_WC_WITH_IMM; 9800f7ec36c9324928e4cd23f02e6d8550f30c32caSteve Wise wc.ex.imm_data = swqe->wr.ex.imm_data; 9974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } 10074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 10174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* 1024ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell * This would be a lot simpler if we could call ipath_get_rwqe() 1034ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell * but that uses state that the receive interrupt handler uses 1044ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell * so we would need to lock out receive interrupts while doing 1054ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell * local loopback. 10674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan */ 10774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan if (qp->ibqp.srq) { 10874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan srq = to_isrq(qp->ibqp.srq); 109373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell handler = srq->ibsrq.event_handler; 11074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan rq = &srq->rq; 11174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } else { 11274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan srq = NULL; 113373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell handler = NULL; 11474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan rq = &qp->r_rq; 11574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } 116373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell 1174ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell /* 1184ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell * Get the next work request entry to find where to put the data. 1194ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell * Note that it is safe to drop the lock after changing rq->tail 1204ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell * since ipath_post_receive() won't fill the empty slot. 1214ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell */ 12274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan spin_lock_irqsave(&rq->lock, flags); 123373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell wq = rq->wq; 124373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell tail = wq->tail; 1254ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell /* Validate tail before using it since it is user writable. */ 1264ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell if (tail >= rq->size) 1274ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell tail = 0; 1284ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell if (unlikely(tail == wq->head)) { 1294ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell spin_unlock_irqrestore(&rq->lock, flags); 1304ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell dev->n_pkt_drops++; 1314ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell goto drop; 1324ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell } 1334ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell wqe = get_rwqe_ptr(rq, tail); 1347c37d74474c8ee8ddcd5a2d2a9571d4a1290c844Ralph Campbell rsge.sg_list = qp->r_ud_sg_list; 1354ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell if (!ipath_init_sge(qp, wqe, &rlen, &rsge)) { 1364ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell spin_unlock_irqrestore(&rq->lock, flags); 1374ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell dev->n_pkt_drops++; 1384ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell goto drop; 13974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } 14074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* Silently drop packets which are too big. */ 1414ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell if (wc.byte_len > rlen) { 14274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan spin_unlock_irqrestore(&rq->lock, flags); 14374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan dev->n_pkt_drops++; 1444ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell goto drop; 14574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } 1464ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell if (++tail >= rq->size) 1474ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell tail = 0; 148373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell wq->tail = tail; 1494ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell wc.wr_id = wqe->wr_id; 150373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell if (handler) { 15174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan u32 n; 15274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 153373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell /* 154373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell * validate head pointer value and compute 155373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell * the number of remaining WQEs. 156373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell */ 157373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell n = wq->head; 158373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell if (n >= rq->size) 159373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell n = 0; 160373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell if (n < tail) 161373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell n += rq->size - tail; 16274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan else 163373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell n -= tail; 16474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan if (n < srq->limit) { 16574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan struct ib_event ev; 16674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 16774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan srq->limit = 0; 16874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan spin_unlock_irqrestore(&rq->lock, flags); 16974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan ev.device = qp->ibqp.device; 17074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan ev.element.srq = qp->ibqp.srq; 17174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan ev.event = IB_EVENT_SRQ_LIMIT_REACHED; 172373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell handler(&ev, srq->ibsrq.srq_context); 17374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } else 17474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan spin_unlock_irqrestore(&rq->lock, flags); 17574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } else 17674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan spin_unlock_irqrestore(&rq->lock, flags); 177373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell 1784ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell ah_attr = &to_iah(swqe->wr.wr.ud.ah)->attr; 17974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan if (ah_attr->ah_flags & IB_AH_GRH) { 18074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan ipath_copy_sge(&rsge, &ah_attr->grh, sizeof(struct ib_grh)); 1814ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell wc.wc_flags |= IB_WC_GRH; 18274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } else 18374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan ipath_skip_sge(&rsge, sizeof(struct ib_grh)); 1844ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell sge = swqe->sg_list; 18574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan while (length) { 18674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan u32 len = sge->length; 18774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 18874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan if (len > length) 18974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan len = length; 19030d149ab58cc3ed8e4bc9c4dc45bebbed0e84b6eRalph Campbell if (len > sge->sge_length) 19130d149ab58cc3ed8e4bc9c4dc45bebbed0e84b6eRalph Campbell len = sge->sge_length; 19274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan BUG_ON(len == 0); 19374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan ipath_copy_sge(&rsge, sge->vaddr, len); 19474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan sge->vaddr += len; 19574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan sge->length -= len; 19674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan sge->sge_length -= len; 19774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan if (sge->sge_length == 0) { 1984ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell if (--swqe->wr.num_sge) 1994ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell sge++; 20074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } else if (sge->length == 0 && sge->mr != NULL) { 20174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan if (++sge->n >= IPATH_SEGSZ) { 20274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan if (++sge->m >= sge->mr->mapsz) 20374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan break; 20474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan sge->n = 0; 20574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } 20674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan sge->vaddr = 20774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan sge->mr->map[sge->m]->segs[sge->n].vaddr; 20874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan sge->length = 20974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan sge->mr->map[sge->m]->segs[sge->n].length; 21074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } 21174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan length -= len; 21274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } 2134ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell wc.status = IB_WC_SUCCESS; 2144ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell wc.opcode = IB_WC_RECV; 2154ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell wc.qp = &qp->ibqp; 2164ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell wc.src_qp = sqp->ibqp.qp_num; 21774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* XXX do we know which pkey matched? Only needed for GSI. */ 2184ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell wc.pkey_index = 0; 2194ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell wc.slid = dev->dd->ipath_lid | 22074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan (ah_attr->src_path_bits & 221542869a17eee2edf389273f40f757aa4e662b3daRalph Campbell ((1 << dev->dd->ipath_lmc) - 1)); 2224ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell wc.sl = ah_attr->sl; 2234ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell wc.dlid_path_bits = 224542869a17eee2edf389273f40f757aa4e662b3daRalph Campbell ah_attr->dlid & ((1 << dev->dd->ipath_lmc) - 1); 2254ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell wc.port_num = 1; 22674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* Signal completion event if the solicited bit is set. */ 2274ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, 2284ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell swqe->wr.send_flags & IB_SEND_SOLICITED); 2294ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbelldrop: 23074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan if (atomic_dec_and_test(&qp->refcount)) 23174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan wake_up(&qp->wait); 232e509be898d8937634437caa474b57ac12795e5bcRalph Campbelldone:; 23374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan} 23474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 23574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan/** 2364ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell * ipath_make_ud_req - construct a UD request packet 23774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * @qp: the QP 23874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * 2394ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell * Return 1 if constructed; otherwise, return 0. 24074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan */ 2414ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbellint ipath_make_ud_req(struct ipath_qp *qp) 24274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan{ 24374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan struct ipath_ibdev *dev = to_idev(qp->ibqp.device); 24474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan struct ipath_other_headers *ohdr; 24574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan struct ib_ah_attr *ah_attr; 2464ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell struct ipath_swqe *wqe; 247e509be898d8937634437caa474b57ac12795e5bcRalph Campbell unsigned long flags; 24874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan u32 nwords; 24974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan u32 extra_bytes; 25074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan u32 bth0; 25174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan u16 lrh0; 25274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan u16 lid; 2534ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell int ret = 0; 2547ec01ff950c455aa1f1ccfaf347eb1aa9ec160d5Ralph Campbell int next_cur; 25574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 256e509be898d8937634437caa474b57ac12795e5bcRalph Campbell spin_lock_irqsave(&qp->s_lock, flags); 257e509be898d8937634437caa474b57ac12795e5bcRalph Campbell 258e509be898d8937634437caa474b57ac12795e5bcRalph Campbell if (!(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_NEXT_SEND_OK)) { 259e509be898d8937634437caa474b57ac12795e5bcRalph Campbell if (!(ib_ipath_state_ops[qp->state] & IPATH_FLUSH_SEND)) 260e509be898d8937634437caa474b57ac12795e5bcRalph Campbell goto bail; 261e509be898d8937634437caa474b57ac12795e5bcRalph Campbell /* We are in the error state, flush the work request. */ 262e509be898d8937634437caa474b57ac12795e5bcRalph Campbell if (qp->s_last == qp->s_head) 263e509be898d8937634437caa474b57ac12795e5bcRalph Campbell goto bail; 264e509be898d8937634437caa474b57ac12795e5bcRalph Campbell /* If DMAs are in progress, we can't flush immediately. */ 265e509be898d8937634437caa474b57ac12795e5bcRalph Campbell if (atomic_read(&qp->s_dma_busy)) { 266e509be898d8937634437caa474b57ac12795e5bcRalph Campbell qp->s_flags |= IPATH_S_WAIT_DMA; 267e509be898d8937634437caa474b57ac12795e5bcRalph Campbell goto bail; 268e509be898d8937634437caa474b57ac12795e5bcRalph Campbell } 269e509be898d8937634437caa474b57ac12795e5bcRalph Campbell wqe = get_swqe_ptr(qp, qp->s_last); 270e509be898d8937634437caa474b57ac12795e5bcRalph Campbell ipath_send_complete(qp, wqe, IB_WC_WR_FLUSH_ERR); 271e509be898d8937634437caa474b57ac12795e5bcRalph Campbell goto done; 272e509be898d8937634437caa474b57ac12795e5bcRalph Campbell } 27374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 2744ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell if (qp->s_cur == qp->s_head) 2756ce73b07db7aa05d4a30716d6a99c832b6d9db4aRobert Walsh goto bail; 2766ce73b07db7aa05d4a30716d6a99c832b6d9db4aRobert Walsh 2774ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell wqe = get_swqe_ptr(qp, qp->s_cur); 2787ec01ff950c455aa1f1ccfaf347eb1aa9ec160d5Ralph Campbell next_cur = qp->s_cur + 1; 2797ec01ff950c455aa1f1ccfaf347eb1aa9ec160d5Ralph Campbell if (next_cur >= qp->s_size) 2807ec01ff950c455aa1f1ccfaf347eb1aa9ec160d5Ralph Campbell next_cur = 0; 28174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 28274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* Construct the header. */ 2834ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell ah_attr = &to_iah(wqe->wr.wr.ud.ah)->attr; 28427b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan if (ah_attr->dlid >= IPATH_MULTICAST_LID_BASE) { 28527b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan if (ah_attr->dlid != IPATH_PERMISSIVE_LID) 28674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan dev->n_multicast_xmit++; 28774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan else 28874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan dev->n_unicast_xmit++; 28974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } else { 29074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan dev->n_unicast_xmit++; 291e509be898d8937634437caa474b57ac12795e5bcRalph Campbell lid = ah_attr->dlid & ~((1 << dev->dd->ipath_lmc) - 1); 29234b2aafea38efdf02cd8107a6e1057e2a297c447Bryan O'Sullivan if (unlikely(lid == dev->dd->ipath_lid)) { 293e509be898d8937634437caa474b57ac12795e5bcRalph Campbell /* 294e509be898d8937634437caa474b57ac12795e5bcRalph Campbell * If DMAs are in progress, we can't generate 295e509be898d8937634437caa474b57ac12795e5bcRalph Campbell * a completion for the loopback packet since 296e509be898d8937634437caa474b57ac12795e5bcRalph Campbell * it would be out of order. 297e509be898d8937634437caa474b57ac12795e5bcRalph Campbell * XXX Instead of waiting, we could queue a 298e509be898d8937634437caa474b57ac12795e5bcRalph Campbell * zero length descriptor so we get a callback. 299e509be898d8937634437caa474b57ac12795e5bcRalph Campbell */ 300e509be898d8937634437caa474b57ac12795e5bcRalph Campbell if (atomic_read(&qp->s_dma_busy)) { 301e509be898d8937634437caa474b57ac12795e5bcRalph Campbell qp->s_flags |= IPATH_S_WAIT_DMA; 302e509be898d8937634437caa474b57ac12795e5bcRalph Campbell goto bail; 303e509be898d8937634437caa474b57ac12795e5bcRalph Campbell } 3047ec01ff950c455aa1f1ccfaf347eb1aa9ec160d5Ralph Campbell qp->s_cur = next_cur; 305e509be898d8937634437caa474b57ac12795e5bcRalph Campbell spin_unlock_irqrestore(&qp->s_lock, flags); 3064ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell ipath_ud_loopback(qp, wqe); 307e509be898d8937634437caa474b57ac12795e5bcRalph Campbell spin_lock_irqsave(&qp->s_lock, flags); 308e509be898d8937634437caa474b57ac12795e5bcRalph Campbell ipath_send_complete(qp, wqe, IB_WC_SUCCESS); 30974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan goto done; 31074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } 31174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } 3124ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell 3137ec01ff950c455aa1f1ccfaf347eb1aa9ec160d5Ralph Campbell qp->s_cur = next_cur; 3144ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell extra_bytes = -wqe->length & 3; 3154ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell nwords = (wqe->length + extra_bytes) >> 2; 3164ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell 3174ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell /* header size in 32-bit words LRH+BTH+DETH = (8+12+8)/4. */ 3184ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell qp->s_hdrwords = 7; 3194ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell qp->s_cur_size = wqe->length; 3204ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell qp->s_cur_sge = &qp->s_sge; 321124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson qp->s_dmult = ah_attr->static_rate; 3224ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell qp->s_wqe = wqe; 3234ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell qp->s_sge.sge = wqe->sg_list[0]; 3244ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell qp->s_sge.sg_list = wqe->sg_list + 1; 3254ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell qp->s_sge.num_sge = wqe->wr.num_sge; 3264ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell 32774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan if (ah_attr->ah_flags & IB_AH_GRH) { 32874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* Header size in 32-bit words. */ 3294ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell qp->s_hdrwords += ipath_make_grh(dev, &qp->s_hdr.u.l.grh, 3304ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell &ah_attr->grh, 3314ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell qp->s_hdrwords, nwords); 33227b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan lrh0 = IPATH_LRH_GRH; 33374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan ohdr = &qp->s_hdr.u.l.oth; 33474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* 33574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * Don't worry about sending to locally attached multicast 33674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * QPs. It is unspecified by the spec. what happens. 33774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan */ 33874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } else { 33974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* Header size in 32-bit words. */ 34027b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan lrh0 = IPATH_LRH_BTH; 34174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan ohdr = &qp->s_hdr.u.oth; 34274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } 3434ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell if (wqe->wr.opcode == IB_WR_SEND_WITH_IMM) { 3444e1e93a4189a98cfb0e24865f7f44470ae5f805eRalph Campbell qp->s_hdrwords++; 3450f39cf3d54e67a705773fd0ec56ca3dcd3e9272fRoland Dreier ohdr->u.ud.imm_data = wqe->wr.ex.imm_data; 34674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan bth0 = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE << 24; 3474ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell } else 34874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan bth0 = IB_OPCODE_UD_SEND_ONLY << 24; 34974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan lrh0 |= ah_attr->sl << 4; 35074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan if (qp->ibqp.qp_type == IB_QPT_SMI) 35174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan lrh0 |= 0xF000; /* Set VL (see ch. 13.5.3.1) */ 35274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan qp->s_hdr.lrh[0] = cpu_to_be16(lrh0); 35374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan qp->s_hdr.lrh[1] = cpu_to_be16(ah_attr->dlid); /* DEST LID */ 3544ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell qp->s_hdr.lrh[2] = cpu_to_be16(qp->s_hdrwords + nwords + 3554ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell SIZE_OF_CRC); 35634b2aafea38efdf02cd8107a6e1057e2a297c447Bryan O'Sullivan lid = dev->dd->ipath_lid; 35774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan if (lid) { 35874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan lid |= ah_attr->src_path_bits & 359542869a17eee2edf389273f40f757aa4e662b3daRalph Campbell ((1 << dev->dd->ipath_lmc) - 1); 36074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan qp->s_hdr.lrh[3] = cpu_to_be16(lid); 36174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } else 36274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan qp->s_hdr.lrh[3] = IB_LID_PERMISSIVE; 3634ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell if (wqe->wr.send_flags & IB_SEND_SOLICITED) 36474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan bth0 |= 1 << 23; 36574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan bth0 |= extra_bytes << 20; 36627b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan bth0 |= qp->ibqp.qp_type == IB_QPT_SMI ? IPATH_DEFAULT_P_KEY : 36734b2aafea38efdf02cd8107a6e1057e2a297c447Bryan O'Sullivan ipath_get_pkey(dev->dd, qp->s_pkey_index); 36874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan ohdr->bth[0] = cpu_to_be32(bth0); 36974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* 37074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * Use the multicast QP if the destination LID is a multicast LID. 37174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan */ 37227b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan ohdr->bth[1] = ah_attr->dlid >= IPATH_MULTICAST_LID_BASE && 37327b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan ah_attr->dlid != IPATH_PERMISSIVE_LID ? 3749c3da0991754d480328eeaa2b90cb231a1cea9b6Harvey Harrison cpu_to_be32(IPATH_MULTICAST_QPN) : 3754ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell cpu_to_be32(wqe->wr.wr.ud.remote_qpn); 37627b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan ohdr->bth[2] = cpu_to_be32(qp->s_next_psn++ & IPATH_PSN_MASK); 37774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* 37874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * Qkeys with the high order bit set mean use the 37974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * qkey from the QP context instead of the WR (see 10.2.5). 38074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan */ 3814ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell ohdr->u.ud.deth[0] = cpu_to_be32((int)wqe->wr.wr.ud.remote_qkey < 0 ? 3824ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell qp->qkey : wqe->wr.wr.ud.remote_qkey); 38374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan ohdr->u.ud.deth[1] = cpu_to_be32(qp->ibqp.qp_num); 38474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 38574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivandone: 3864ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell ret = 1; 387e509be898d8937634437caa474b57ac12795e5bcRalph Campbell goto unlock; 38874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 38974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivanbail: 390e509be898d8937634437caa474b57ac12795e5bcRalph Campbell qp->s_flags &= ~IPATH_S_BUSY; 391e509be898d8937634437caa474b57ac12795e5bcRalph Campbellunlock: 392e509be898d8937634437caa474b57ac12795e5bcRalph Campbell spin_unlock_irqrestore(&qp->s_lock, flags); 39374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan return ret; 39474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan} 39574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 39674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan/** 39774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * ipath_ud_rcv - receive an incoming UD packet 39874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * @dev: the device the packet came in on 39974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * @hdr: the packet header 40074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * @has_grh: true if the packet has a GRH 40174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * @data: the packet data 40274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * @tlen: the packet length 40374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * @qp: the QP the packet came on 40474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * 40574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * This is called from ipath_qp_rcv() to process an incoming UD packet 40674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * for the given QP. 40774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * Called at interrupt level. 40874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan */ 40974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivanvoid ipath_ud_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr, 41074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan int has_grh, void *data, u32 tlen, struct ipath_qp *qp) 41174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan{ 41274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan struct ipath_other_headers *ohdr; 41374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan int opcode; 41474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan u32 hdrsize; 41574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan u32 pad; 41674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan struct ib_wc wc; 41774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan u32 qkey; 41874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan u32 src_qp; 41974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan u16 dlid; 42074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan int header_in_data; 42174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 42274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* Check for GRH */ 42374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan if (!has_grh) { 42474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan ohdr = &hdr->u.oth; 42574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan hdrsize = 8 + 12 + 8; /* LRH + BTH + DETH */ 42674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan qkey = be32_to_cpu(ohdr->u.ud.deth[0]); 42774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan src_qp = be32_to_cpu(ohdr->u.ud.deth[1]); 42874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan header_in_data = 0; 42974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } else { 43074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan ohdr = &hdr->u.l.oth; 43174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan hdrsize = 8 + 40 + 12 + 8; /* LRH + GRH + BTH + DETH */ 43274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* 43374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * The header with GRH is 68 bytes and the core driver sets 43474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * the eager header buffer size to 56 bytes so the last 12 43574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * bytes of the IB header is in the data buffer. 43674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan */ 43734b2aafea38efdf02cd8107a6e1057e2a297c447Bryan O'Sullivan header_in_data = dev->dd->ipath_rcvhdrentsize == 16; 43874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan if (header_in_data) { 43974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan qkey = be32_to_cpu(((__be32 *) data)[1]); 44074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan src_qp = be32_to_cpu(((__be32 *) data)[2]); 44174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan data += 12; 44274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } else { 44374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan qkey = be32_to_cpu(ohdr->u.ud.deth[0]); 44474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan src_qp = be32_to_cpu(ohdr->u.ud.deth[1]); 44574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } 44674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } 44727b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan src_qp &= IPATH_QPN_MASK; 44874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 44974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* 45074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * Check that the permissive LID is only used on QP0 45174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * and the QKEY matches (see 9.6.1.4.1 and 9.6.1.5.1). 45274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan */ 45374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan if (qp->ibqp.qp_num) { 45474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan if (unlikely(hdr->lrh[1] == IB_LID_PERMISSIVE || 45574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan hdr->lrh[3] == IB_LID_PERMISSIVE)) { 45674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan dev->n_pkt_drops++; 45774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan goto bail; 45874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } 45974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan if (unlikely(qkey != qp->qkey)) { 46074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* XXX OK to lose a count once in a while. */ 46174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan dev->qkey_violations++; 46274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan dev->n_pkt_drops++; 46374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan goto bail; 46474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } 46574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } else if (hdr->lrh[1] == IB_LID_PERMISSIVE || 46674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan hdr->lrh[3] == IB_LID_PERMISSIVE) { 46774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan struct ib_smp *smp = (struct ib_smp *) data; 46874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 46974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan if (smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { 47074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan dev->n_pkt_drops++; 47174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan goto bail; 47274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } 47374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } 47474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 4750a69631b2869093d7306e8f66cca8eb0a05aa919Ralph Campbell /* 4760a69631b2869093d7306e8f66cca8eb0a05aa919Ralph Campbell * The opcode is in the low byte when its in network order 4770a69631b2869093d7306e8f66cca8eb0a05aa919Ralph Campbell * (top byte when in host order). 4780a69631b2869093d7306e8f66cca8eb0a05aa919Ralph Campbell */ 4790a69631b2869093d7306e8f66cca8eb0a05aa919Ralph Campbell opcode = be32_to_cpu(ohdr->bth[0]) >> 24; 4800a69631b2869093d7306e8f66cca8eb0a05aa919Ralph Campbell if (qp->ibqp.qp_num > 1 && 4810a69631b2869093d7306e8f66cca8eb0a05aa919Ralph Campbell opcode == IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE) { 4820a69631b2869093d7306e8f66cca8eb0a05aa919Ralph Campbell if (header_in_data) { 48300f7ec36c9324928e4cd23f02e6d8550f30c32caSteve Wise wc.ex.imm_data = *(__be32 *) data; 4840a69631b2869093d7306e8f66cca8eb0a05aa919Ralph Campbell data += sizeof(__be32); 4850a69631b2869093d7306e8f66cca8eb0a05aa919Ralph Campbell } else 48600f7ec36c9324928e4cd23f02e6d8550f30c32caSteve Wise wc.ex.imm_data = ohdr->u.ud.imm_data; 4870a69631b2869093d7306e8f66cca8eb0a05aa919Ralph Campbell wc.wc_flags = IB_WC_WITH_IMM; 4880a69631b2869093d7306e8f66cca8eb0a05aa919Ralph Campbell hdrsize += sizeof(u32); 4890a69631b2869093d7306e8f66cca8eb0a05aa919Ralph Campbell } else if (opcode == IB_OPCODE_UD_SEND_ONLY) { 49000f7ec36c9324928e4cd23f02e6d8550f30c32caSteve Wise wc.ex.imm_data = 0; 4910a69631b2869093d7306e8f66cca8eb0a05aa919Ralph Campbell wc.wc_flags = 0; 4920a69631b2869093d7306e8f66cca8eb0a05aa919Ralph Campbell } else { 4930a69631b2869093d7306e8f66cca8eb0a05aa919Ralph Campbell dev->n_pkt_drops++; 4940a69631b2869093d7306e8f66cca8eb0a05aa919Ralph Campbell goto bail; 4950a69631b2869093d7306e8f66cca8eb0a05aa919Ralph Campbell } 4960a69631b2869093d7306e8f66cca8eb0a05aa919Ralph Campbell 49774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* Get the number of bytes the message was padded by. */ 49874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3; 49974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan if (unlikely(tlen < (hdrsize + pad + 4))) { 50074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* Drop incomplete packets. */ 50174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan dev->n_pkt_drops++; 50274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan goto bail; 50374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } 50474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan tlen -= hdrsize + pad + 4; 50574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 50674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* Drop invalid MAD packets (see 13.5.3.1). */ 50774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan if (unlikely((qp->ibqp.qp_num == 0 && 50874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan (tlen != 256 || 50974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan (be16_to_cpu(hdr->lrh[0]) >> 12) != 15)) || 51074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan (qp->ibqp.qp_num == 1 && 51174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan (tlen != 256 || 51274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan (be16_to_cpu(hdr->lrh[0]) >> 12) == 15)))) { 51374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan dev->n_pkt_drops++; 51474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan goto bail; 51574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } 51674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 51774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* 51825985edcedea6396277003854657b5f3cb31a628Lucas De Marchi * A GRH is expected to precede the data even if not 51974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * present on the wire. 52074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan */ 52174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan wc.byte_len = tlen + sizeof(struct ib_grh); 52274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 52374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* 52474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * Get the next work request entry to find where to put the data. 52574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan */ 526e509be898d8937634437caa474b57ac12795e5bcRalph Campbell if (qp->r_flags & IPATH_R_REUSE_SGE) 527e509be898d8937634437caa474b57ac12795e5bcRalph Campbell qp->r_flags &= ~IPATH_R_REUSE_SGE; 528373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell else if (!ipath_get_rwqe(qp, 0)) { 529fba75200ad92892bf32d8d6f1443c6f1e4f48676Bryan O'Sullivan /* 530fba75200ad92892bf32d8d6f1443c6f1e4f48676Bryan O'Sullivan * Count VL15 packets dropped due to no receive buffer. 531fba75200ad92892bf32d8d6f1443c6f1e4f48676Bryan O'Sullivan * Otherwise, count them as buffer overruns since usually, 532fba75200ad92892bf32d8d6f1443c6f1e4f48676Bryan O'Sullivan * the HW will be able to receive packets even if there are 533fba75200ad92892bf32d8d6f1443c6f1e4f48676Bryan O'Sullivan * no QPs with posted receive buffers. 534fba75200ad92892bf32d8d6f1443c6f1e4f48676Bryan O'Sullivan */ 535fba75200ad92892bf32d8d6f1443c6f1e4f48676Bryan O'Sullivan if (qp->ibqp.qp_num == 0) 536fba75200ad92892bf32d8d6f1443c6f1e4f48676Bryan O'Sullivan dev->n_vl15_dropped++; 537fba75200ad92892bf32d8d6f1443c6f1e4f48676Bryan O'Sullivan else 538fba75200ad92892bf32d8d6f1443c6f1e4f48676Bryan O'Sullivan dev->rcv_errors++; 53974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan goto bail; 54074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } 54174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* Silently drop packets which are too big. */ 542373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell if (wc.byte_len > qp->r_len) { 543e509be898d8937634437caa474b57ac12795e5bcRalph Campbell qp->r_flags |= IPATH_R_REUSE_SGE; 54474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan dev->n_pkt_drops++; 54574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan goto bail; 54674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } 54774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan if (has_grh) { 54874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan ipath_copy_sge(&qp->r_sge, &hdr->u.l.grh, 54974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan sizeof(struct ib_grh)); 55074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan wc.wc_flags |= IB_WC_GRH; 55174ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan } else 55274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan ipath_skip_sge(&qp->r_sge, sizeof(struct ib_grh)); 55374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan ipath_copy_sge(&qp->r_sge, data, 55474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan wc.byte_len - sizeof(struct ib_grh)); 555e509be898d8937634437caa474b57ac12795e5bcRalph Campbell if (!test_and_clear_bit(IPATH_R_WRID_VALID, &qp->r_aflags)) 556e509be898d8937634437caa474b57ac12795e5bcRalph Campbell goto bail; 557373d9915803aebbbf7fd3841efd9dac31c32e148Ralph Campbell wc.wr_id = qp->r_wr_id; 55874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan wc.status = IB_WC_SUCCESS; 55974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan wc.opcode = IB_WC_RECV; 56074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan wc.vendor_err = 0; 561062dbb69f32b9ccea701b30f8cc0049482e6211fMichael S. Tsirkin wc.qp = &qp->ibqp; 56274ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan wc.src_qp = src_qp; 56374ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* XXX do we know which pkey matched? Only needed for GSI. */ 56474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan wc.pkey_index = 0; 56574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan wc.slid = be16_to_cpu(hdr->lrh[3]); 56674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan wc.sl = (be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF; 56774ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan dlid = be16_to_cpu(hdr->lrh[1]); 56874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* 56974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan * Save the LMC lower bits if the destination LID is a unicast LID. 57074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan */ 57127b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan wc.dlid_path_bits = dlid >= IPATH_MULTICAST_LID_BASE ? 0 : 572542869a17eee2edf389273f40f757aa4e662b3daRalph Campbell dlid & ((1 << dev->dd->ipath_lmc) - 1); 5734ee97180ac76deb5a715ac45b7d7516e6ee82ae7Ralph Campbell wc.port_num = 1; 57474ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan /* Signal completion event if the solicited bit is set. */ 57574ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, 57674ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan (ohdr->bth[0] & 5779c3da0991754d480328eeaa2b90cb231a1cea9b6Harvey Harrison cpu_to_be32(1 << 23)) != 0); 57874ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan 57974ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivanbail:; 58074ed6b5eb133b4acae7c47bc23457e5f8e7c1125Bryan O'Sullivan} 581