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1065 lines
30 KiB
1065 lines
30 KiB
/* |
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* Copyright(c) 2015 - 2019 Intel Corporation. |
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* |
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* This file is provided under a dual BSD/GPLv2 license. When using or |
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* redistributing this file, you may do so under either license. |
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* |
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* GPL LICENSE SUMMARY |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of version 2 of the GNU General Public License as |
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* published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* General Public License for more details. |
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* |
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* BSD LICENSE |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* - Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* - Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* - Neither the name of Intel Corporation nor the names of its |
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* contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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|
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#include <linux/net.h> |
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#include <rdma/ib_smi.h> |
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|
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#include "hfi.h" |
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#include "mad.h" |
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#include "verbs_txreq.h" |
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#include "trace_ibhdrs.h" |
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#include "qp.h" |
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|
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/* We support only two types - 9B and 16B for now */ |
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static const hfi1_make_req hfi1_make_ud_req_tbl[2] = { |
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[HFI1_PKT_TYPE_9B] = &hfi1_make_ud_req_9B, |
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[HFI1_PKT_TYPE_16B] = &hfi1_make_ud_req_16B |
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}; |
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|
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/** |
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* ud_loopback - handle send on loopback QPs |
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* @sqp: the sending QP |
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* @swqe: the send work request |
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* |
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* This is called from hfi1_make_ud_req() to forward a WQE addressed |
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* to the same HFI. |
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* Note that the receive interrupt handler may be calling hfi1_ud_rcv() |
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* while this is being called. |
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*/ |
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static void ud_loopback(struct rvt_qp *sqp, struct rvt_swqe *swqe) |
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{ |
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struct hfi1_ibport *ibp = to_iport(sqp->ibqp.device, sqp->port_num); |
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struct hfi1_pportdata *ppd; |
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struct hfi1_qp_priv *priv = sqp->priv; |
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struct rvt_qp *qp; |
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struct rdma_ah_attr *ah_attr; |
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unsigned long flags; |
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struct rvt_sge_state ssge; |
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struct rvt_sge *sge; |
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struct ib_wc wc; |
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u32 length; |
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enum ib_qp_type sqptype, dqptype; |
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|
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rcu_read_lock(); |
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|
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qp = rvt_lookup_qpn(ib_to_rvt(sqp->ibqp.device), &ibp->rvp, |
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rvt_get_swqe_remote_qpn(swqe)); |
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if (!qp) { |
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ibp->rvp.n_pkt_drops++; |
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rcu_read_unlock(); |
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return; |
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} |
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|
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sqptype = sqp->ibqp.qp_type == IB_QPT_GSI ? |
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IB_QPT_UD : sqp->ibqp.qp_type; |
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dqptype = qp->ibqp.qp_type == IB_QPT_GSI ? |
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IB_QPT_UD : qp->ibqp.qp_type; |
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|
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if (dqptype != sqptype || |
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!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK)) { |
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ibp->rvp.n_pkt_drops++; |
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goto drop; |
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} |
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|
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ah_attr = rvt_get_swqe_ah_attr(swqe); |
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ppd = ppd_from_ibp(ibp); |
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|
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if (qp->ibqp.qp_num > 1) { |
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u16 pkey; |
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u32 slid; |
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u8 sc5 = ibp->sl_to_sc[rdma_ah_get_sl(ah_attr)]; |
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|
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pkey = hfi1_get_pkey(ibp, sqp->s_pkey_index); |
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slid = ppd->lid | (rdma_ah_get_path_bits(ah_attr) & |
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((1 << ppd->lmc) - 1)); |
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if (unlikely(ingress_pkey_check(ppd, pkey, sc5, |
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qp->s_pkey_index, |
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slid, false))) { |
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hfi1_bad_pkey(ibp, pkey, |
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rdma_ah_get_sl(ah_attr), |
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sqp->ibqp.qp_num, qp->ibqp.qp_num, |
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slid, rdma_ah_get_dlid(ah_attr)); |
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goto drop; |
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} |
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} |
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|
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/* |
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* Check that the qkey matches (except for QP0, see 9.6.1.4.1). |
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* Qkeys with the high order bit set mean use the |
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* qkey from the QP context instead of the WR (see 10.2.5). |
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*/ |
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if (qp->ibqp.qp_num) { |
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u32 qkey; |
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|
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qkey = (int)rvt_get_swqe_remote_qkey(swqe) < 0 ? |
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sqp->qkey : rvt_get_swqe_remote_qkey(swqe); |
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if (unlikely(qkey != qp->qkey)) |
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goto drop; /* silently drop per IBTA spec */ |
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} |
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|
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/* |
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* A GRH is expected to precede the data even if not |
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* present on the wire. |
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*/ |
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length = swqe->length; |
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memset(&wc, 0, sizeof(wc)); |
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wc.byte_len = length + sizeof(struct ib_grh); |
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|
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if (swqe->wr.opcode == IB_WR_SEND_WITH_IMM) { |
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wc.wc_flags = IB_WC_WITH_IMM; |
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wc.ex.imm_data = swqe->wr.ex.imm_data; |
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} |
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|
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spin_lock_irqsave(&qp->r_lock, flags); |
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|
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/* |
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* Get the next work request entry to find where to put the data. |
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*/ |
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if (qp->r_flags & RVT_R_REUSE_SGE) { |
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qp->r_flags &= ~RVT_R_REUSE_SGE; |
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} else { |
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int ret; |
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|
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ret = rvt_get_rwqe(qp, false); |
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if (ret < 0) { |
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rvt_rc_error(qp, IB_WC_LOC_QP_OP_ERR); |
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goto bail_unlock; |
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} |
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if (!ret) { |
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if (qp->ibqp.qp_num == 0) |
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ibp->rvp.n_vl15_dropped++; |
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goto bail_unlock; |
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} |
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} |
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/* Silently drop packets which are too big. */ |
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if (unlikely(wc.byte_len > qp->r_len)) { |
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qp->r_flags |= RVT_R_REUSE_SGE; |
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ibp->rvp.n_pkt_drops++; |
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goto bail_unlock; |
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} |
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|
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if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) { |
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struct ib_grh grh; |
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struct ib_global_route grd = *(rdma_ah_read_grh(ah_attr)); |
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|
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/* |
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* For loopback packets with extended LIDs, the |
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* sgid_index in the GRH is 0 and the dgid is |
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* OPA GID of the sender. While creating a response |
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* to the loopback packet, IB core creates the new |
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* sgid_index from the DGID and that will be the |
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* OPA_GID_INDEX. The new dgid is from the sgid |
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* index and that will be in the IB GID format. |
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* |
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* We now have a case where the sent packet had a |
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* different sgid_index and dgid compared to the |
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* one that was received in response. |
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* |
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* Fix this inconsistency. |
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*/ |
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if (priv->hdr_type == HFI1_PKT_TYPE_16B) { |
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if (grd.sgid_index == 0) |
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grd.sgid_index = OPA_GID_INDEX; |
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|
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if (ib_is_opa_gid(&grd.dgid)) |
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grd.dgid.global.interface_id = |
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cpu_to_be64(ppd->guids[HFI1_PORT_GUID_INDEX]); |
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} |
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|
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hfi1_make_grh(ibp, &grh, &grd, 0, 0); |
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rvt_copy_sge(qp, &qp->r_sge, &grh, |
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sizeof(grh), true, false); |
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wc.wc_flags |= IB_WC_GRH; |
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} else { |
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rvt_skip_sge(&qp->r_sge, sizeof(struct ib_grh), true); |
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} |
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ssge.sg_list = swqe->sg_list + 1; |
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ssge.sge = *swqe->sg_list; |
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ssge.num_sge = swqe->wr.num_sge; |
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sge = &ssge.sge; |
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while (length) { |
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u32 len = rvt_get_sge_length(sge, length); |
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|
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WARN_ON_ONCE(len == 0); |
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rvt_copy_sge(qp, &qp->r_sge, sge->vaddr, len, true, false); |
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rvt_update_sge(&ssge, len, false); |
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length -= len; |
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} |
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rvt_put_ss(&qp->r_sge); |
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if (!test_and_clear_bit(RVT_R_WRID_VALID, &qp->r_aflags)) |
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goto bail_unlock; |
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wc.wr_id = qp->r_wr_id; |
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wc.status = IB_WC_SUCCESS; |
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wc.opcode = IB_WC_RECV; |
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wc.qp = &qp->ibqp; |
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wc.src_qp = sqp->ibqp.qp_num; |
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if (qp->ibqp.qp_type == IB_QPT_GSI || qp->ibqp.qp_type == IB_QPT_SMI) { |
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if (sqp->ibqp.qp_type == IB_QPT_GSI || |
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sqp->ibqp.qp_type == IB_QPT_SMI) |
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wc.pkey_index = rvt_get_swqe_pkey_index(swqe); |
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else |
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wc.pkey_index = sqp->s_pkey_index; |
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} else { |
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wc.pkey_index = 0; |
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} |
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wc.slid = (ppd->lid | (rdma_ah_get_path_bits(ah_attr) & |
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((1 << ppd->lmc) - 1))) & U16_MAX; |
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/* Check for loopback when the port lid is not set */ |
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if (wc.slid == 0 && sqp->ibqp.qp_type == IB_QPT_GSI) |
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wc.slid = be16_to_cpu(IB_LID_PERMISSIVE); |
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wc.sl = rdma_ah_get_sl(ah_attr); |
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wc.dlid_path_bits = rdma_ah_get_dlid(ah_attr) & ((1 << ppd->lmc) - 1); |
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wc.port_num = qp->port_num; |
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/* Signal completion event if the solicited bit is set. */ |
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rvt_recv_cq(qp, &wc, swqe->wr.send_flags & IB_SEND_SOLICITED); |
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ibp->rvp.n_loop_pkts++; |
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bail_unlock: |
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spin_unlock_irqrestore(&qp->r_lock, flags); |
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drop: |
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rcu_read_unlock(); |
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} |
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|
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static void hfi1_make_bth_deth(struct rvt_qp *qp, struct rvt_swqe *wqe, |
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struct ib_other_headers *ohdr, |
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u16 *pkey, u32 extra_bytes, bool bypass) |
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{ |
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u32 bth0; |
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struct hfi1_ibport *ibp; |
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|
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ibp = to_iport(qp->ibqp.device, qp->port_num); |
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if (wqe->wr.opcode == IB_WR_SEND_WITH_IMM) { |
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ohdr->u.ud.imm_data = wqe->wr.ex.imm_data; |
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bth0 = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE << 24; |
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} else { |
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bth0 = IB_OPCODE_UD_SEND_ONLY << 24; |
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} |
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|
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if (wqe->wr.send_flags & IB_SEND_SOLICITED) |
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bth0 |= IB_BTH_SOLICITED; |
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bth0 |= extra_bytes << 20; |
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if (qp->ibqp.qp_type == IB_QPT_GSI || qp->ibqp.qp_type == IB_QPT_SMI) |
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*pkey = hfi1_get_pkey(ibp, rvt_get_swqe_pkey_index(wqe)); |
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else |
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*pkey = hfi1_get_pkey(ibp, qp->s_pkey_index); |
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if (!bypass) |
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bth0 |= *pkey; |
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ohdr->bth[0] = cpu_to_be32(bth0); |
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ohdr->bth[1] = cpu_to_be32(rvt_get_swqe_remote_qpn(wqe)); |
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ohdr->bth[2] = cpu_to_be32(mask_psn(wqe->psn)); |
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/* |
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* Qkeys with the high order bit set mean use the |
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* qkey from the QP context instead of the WR (see 10.2.5). |
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*/ |
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ohdr->u.ud.deth[0] = |
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cpu_to_be32((int)rvt_get_swqe_remote_qkey(wqe) < 0 ? qp->qkey : |
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rvt_get_swqe_remote_qkey(wqe)); |
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ohdr->u.ud.deth[1] = cpu_to_be32(qp->ibqp.qp_num); |
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} |
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|
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void hfi1_make_ud_req_9B(struct rvt_qp *qp, struct hfi1_pkt_state *ps, |
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struct rvt_swqe *wqe) |
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{ |
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u32 nwords, extra_bytes; |
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u16 len, slid, dlid, pkey; |
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u16 lrh0 = 0; |
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u8 sc5; |
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struct hfi1_qp_priv *priv = qp->priv; |
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struct ib_other_headers *ohdr; |
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struct rdma_ah_attr *ah_attr; |
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struct hfi1_pportdata *ppd; |
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struct hfi1_ibport *ibp; |
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struct ib_grh *grh; |
|
|
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ibp = to_iport(qp->ibqp.device, qp->port_num); |
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ppd = ppd_from_ibp(ibp); |
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ah_attr = rvt_get_swqe_ah_attr(wqe); |
|
|
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extra_bytes = -wqe->length & 3; |
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nwords = ((wqe->length + extra_bytes) >> 2) + SIZE_OF_CRC; |
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/* header size in dwords LRH+BTH+DETH = (8+12+8)/4. */ |
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ps->s_txreq->hdr_dwords = 7; |
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if (wqe->wr.opcode == IB_WR_SEND_WITH_IMM) |
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ps->s_txreq->hdr_dwords++; |
|
|
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if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) { |
|
grh = &ps->s_txreq->phdr.hdr.ibh.u.l.grh; |
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ps->s_txreq->hdr_dwords += |
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hfi1_make_grh(ibp, grh, rdma_ah_read_grh(ah_attr), |
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ps->s_txreq->hdr_dwords - LRH_9B_DWORDS, |
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nwords); |
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lrh0 = HFI1_LRH_GRH; |
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ohdr = &ps->s_txreq->phdr.hdr.ibh.u.l.oth; |
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} else { |
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lrh0 = HFI1_LRH_BTH; |
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ohdr = &ps->s_txreq->phdr.hdr.ibh.u.oth; |
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} |
|
|
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sc5 = ibp->sl_to_sc[rdma_ah_get_sl(ah_attr)]; |
|
lrh0 |= (rdma_ah_get_sl(ah_attr) & 0xf) << 4; |
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if (qp->ibqp.qp_type == IB_QPT_SMI) { |
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lrh0 |= 0xF000; /* Set VL (see ch. 13.5.3.1) */ |
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priv->s_sc = 0xf; |
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} else { |
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lrh0 |= (sc5 & 0xf) << 12; |
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priv->s_sc = sc5; |
|
} |
|
|
|
dlid = opa_get_lid(rdma_ah_get_dlid(ah_attr), 9B); |
|
if (dlid == be16_to_cpu(IB_LID_PERMISSIVE)) { |
|
slid = be16_to_cpu(IB_LID_PERMISSIVE); |
|
} else { |
|
u16 lid = (u16)ppd->lid; |
|
|
|
if (lid) { |
|
lid |= rdma_ah_get_path_bits(ah_attr) & |
|
((1 << ppd->lmc) - 1); |
|
slid = lid; |
|
} else { |
|
slid = be16_to_cpu(IB_LID_PERMISSIVE); |
|
} |
|
} |
|
hfi1_make_bth_deth(qp, wqe, ohdr, &pkey, extra_bytes, false); |
|
len = ps->s_txreq->hdr_dwords + nwords; |
|
|
|
/* Setup the packet */ |
|
ps->s_txreq->phdr.hdr.hdr_type = HFI1_PKT_TYPE_9B; |
|
hfi1_make_ib_hdr(&ps->s_txreq->phdr.hdr.ibh, |
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lrh0, len, dlid, slid); |
|
} |
|
|
|
void hfi1_make_ud_req_16B(struct rvt_qp *qp, struct hfi1_pkt_state *ps, |
|
struct rvt_swqe *wqe) |
|
{ |
|
struct hfi1_qp_priv *priv = qp->priv; |
|
struct ib_other_headers *ohdr; |
|
struct rdma_ah_attr *ah_attr; |
|
struct hfi1_pportdata *ppd; |
|
struct hfi1_ibport *ibp; |
|
u32 dlid, slid, nwords, extra_bytes; |
|
u32 dest_qp = rvt_get_swqe_remote_qpn(wqe); |
|
u32 src_qp = qp->ibqp.qp_num; |
|
u16 len, pkey; |
|
u8 l4, sc5; |
|
bool is_mgmt = false; |
|
|
|
ibp = to_iport(qp->ibqp.device, qp->port_num); |
|
ppd = ppd_from_ibp(ibp); |
|
ah_attr = rvt_get_swqe_ah_attr(wqe); |
|
|
|
/* |
|
* Build 16B Management Packet if either the destination |
|
* or source queue pair number is 0 or 1. |
|
*/ |
|
if (dest_qp == 0 || src_qp == 0 || dest_qp == 1 || src_qp == 1) { |
|
/* header size in dwords 16B LRH+L4_FM = (16+8)/4. */ |
|
ps->s_txreq->hdr_dwords = 6; |
|
is_mgmt = true; |
|
} else { |
|
/* header size in dwords 16B LRH+BTH+DETH = (16+12+8)/4. */ |
|
ps->s_txreq->hdr_dwords = 9; |
|
if (wqe->wr.opcode == IB_WR_SEND_WITH_IMM) |
|
ps->s_txreq->hdr_dwords++; |
|
} |
|
|
|
/* SW provides space for CRC and LT for bypass packets. */ |
|
extra_bytes = hfi1_get_16b_padding((ps->s_txreq->hdr_dwords << 2), |
|
wqe->length); |
|
nwords = ((wqe->length + extra_bytes + SIZE_OF_LT) >> 2) + SIZE_OF_CRC; |
|
|
|
if ((rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) && |
|
hfi1_check_mcast(rdma_ah_get_dlid(ah_attr))) { |
|
struct ib_grh *grh; |
|
struct ib_global_route *grd = rdma_ah_retrieve_grh(ah_attr); |
|
/* |
|
* Ensure OPA GIDs are transformed to IB gids |
|
* before creating the GRH. |
|
*/ |
|
if (grd->sgid_index == OPA_GID_INDEX) { |
|
dd_dev_warn(ppd->dd, "Bad sgid_index. sgid_index: %d\n", |
|
grd->sgid_index); |
|
grd->sgid_index = 0; |
|
} |
|
grh = &ps->s_txreq->phdr.hdr.opah.u.l.grh; |
|
ps->s_txreq->hdr_dwords += hfi1_make_grh( |
|
ibp, grh, grd, |
|
ps->s_txreq->hdr_dwords - LRH_16B_DWORDS, |
|
nwords); |
|
ohdr = &ps->s_txreq->phdr.hdr.opah.u.l.oth; |
|
l4 = OPA_16B_L4_IB_GLOBAL; |
|
} else { |
|
ohdr = &ps->s_txreq->phdr.hdr.opah.u.oth; |
|
l4 = OPA_16B_L4_IB_LOCAL; |
|
} |
|
|
|
sc5 = ibp->sl_to_sc[rdma_ah_get_sl(ah_attr)]; |
|
if (qp->ibqp.qp_type == IB_QPT_SMI) |
|
priv->s_sc = 0xf; |
|
else |
|
priv->s_sc = sc5; |
|
|
|
dlid = opa_get_lid(rdma_ah_get_dlid(ah_attr), 16B); |
|
if (!ppd->lid) |
|
slid = be32_to_cpu(OPA_LID_PERMISSIVE); |
|
else |
|
slid = ppd->lid | (rdma_ah_get_path_bits(ah_attr) & |
|
((1 << ppd->lmc) - 1)); |
|
|
|
if (is_mgmt) { |
|
l4 = OPA_16B_L4_FM; |
|
pkey = hfi1_get_pkey(ibp, rvt_get_swqe_pkey_index(wqe)); |
|
hfi1_16B_set_qpn(&ps->s_txreq->phdr.hdr.opah.u.mgmt, |
|
dest_qp, src_qp); |
|
} else { |
|
hfi1_make_bth_deth(qp, wqe, ohdr, &pkey, extra_bytes, true); |
|
} |
|
/* Convert dwords to flits */ |
|
len = (ps->s_txreq->hdr_dwords + nwords) >> 1; |
|
|
|
/* Setup the packet */ |
|
ps->s_txreq->phdr.hdr.hdr_type = HFI1_PKT_TYPE_16B; |
|
hfi1_make_16b_hdr(&ps->s_txreq->phdr.hdr.opah, |
|
slid, dlid, len, pkey, 0, 0, l4, priv->s_sc); |
|
} |
|
|
|
/** |
|
* hfi1_make_ud_req - construct a UD request packet |
|
* @qp: the QP |
|
* @ps: the current packet state |
|
* |
|
* Assume s_lock is held. |
|
* |
|
* Return 1 if constructed; otherwise, return 0. |
|
*/ |
|
int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps) |
|
{ |
|
struct hfi1_qp_priv *priv = qp->priv; |
|
struct rdma_ah_attr *ah_attr; |
|
struct hfi1_pportdata *ppd; |
|
struct hfi1_ibport *ibp; |
|
struct rvt_swqe *wqe; |
|
int next_cur; |
|
u32 lid; |
|
|
|
ps->s_txreq = get_txreq(ps->dev, qp); |
|
if (!ps->s_txreq) |
|
goto bail_no_tx; |
|
|
|
if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_NEXT_SEND_OK)) { |
|
if (!(ib_rvt_state_ops[qp->state] & RVT_FLUSH_SEND)) |
|
goto bail; |
|
/* We are in the error state, flush the work request. */ |
|
if (qp->s_last == READ_ONCE(qp->s_head)) |
|
goto bail; |
|
/* If DMAs are in progress, we can't flush immediately. */ |
|
if (iowait_sdma_pending(&priv->s_iowait)) { |
|
qp->s_flags |= RVT_S_WAIT_DMA; |
|
goto bail; |
|
} |
|
wqe = rvt_get_swqe_ptr(qp, qp->s_last); |
|
rvt_send_complete(qp, wqe, IB_WC_WR_FLUSH_ERR); |
|
goto done_free_tx; |
|
} |
|
|
|
/* see post_one_send() */ |
|
if (qp->s_cur == READ_ONCE(qp->s_head)) |
|
goto bail; |
|
|
|
wqe = rvt_get_swqe_ptr(qp, qp->s_cur); |
|
next_cur = qp->s_cur + 1; |
|
if (next_cur >= qp->s_size) |
|
next_cur = 0; |
|
|
|
/* Construct the header. */ |
|
ibp = to_iport(qp->ibqp.device, qp->port_num); |
|
ppd = ppd_from_ibp(ibp); |
|
ah_attr = rvt_get_swqe_ah_attr(wqe); |
|
priv->hdr_type = hfi1_get_hdr_type(ppd->lid, ah_attr); |
|
if ((!hfi1_check_mcast(rdma_ah_get_dlid(ah_attr))) || |
|
(rdma_ah_get_dlid(ah_attr) == be32_to_cpu(OPA_LID_PERMISSIVE))) { |
|
lid = rdma_ah_get_dlid(ah_attr) & ~((1 << ppd->lmc) - 1); |
|
if (unlikely(!loopback && |
|
((lid == ppd->lid) || |
|
((lid == be32_to_cpu(OPA_LID_PERMISSIVE)) && |
|
(qp->ibqp.qp_type == IB_QPT_GSI))))) { |
|
unsigned long tflags = ps->flags; |
|
/* |
|
* If DMAs are in progress, we can't generate |
|
* a completion for the loopback packet since |
|
* it would be out of order. |
|
* Instead of waiting, we could queue a |
|
* zero length descriptor so we get a callback. |
|
*/ |
|
if (iowait_sdma_pending(&priv->s_iowait)) { |
|
qp->s_flags |= RVT_S_WAIT_DMA; |
|
goto bail; |
|
} |
|
qp->s_cur = next_cur; |
|
spin_unlock_irqrestore(&qp->s_lock, tflags); |
|
ud_loopback(qp, wqe); |
|
spin_lock_irqsave(&qp->s_lock, tflags); |
|
ps->flags = tflags; |
|
rvt_send_complete(qp, wqe, IB_WC_SUCCESS); |
|
goto done_free_tx; |
|
} |
|
} |
|
|
|
qp->s_cur = next_cur; |
|
ps->s_txreq->s_cur_size = wqe->length; |
|
ps->s_txreq->ss = &qp->s_sge; |
|
qp->s_srate = rdma_ah_get_static_rate(ah_attr); |
|
qp->srate_mbps = ib_rate_to_mbps(qp->s_srate); |
|
qp->s_wqe = wqe; |
|
qp->s_sge.sge = wqe->sg_list[0]; |
|
qp->s_sge.sg_list = wqe->sg_list + 1; |
|
qp->s_sge.num_sge = wqe->wr.num_sge; |
|
qp->s_sge.total_len = wqe->length; |
|
|
|
/* Make the appropriate header */ |
|
hfi1_make_ud_req_tbl[priv->hdr_type](qp, ps, qp->s_wqe); |
|
priv->s_sde = qp_to_sdma_engine(qp, priv->s_sc); |
|
ps->s_txreq->sde = priv->s_sde; |
|
priv->s_sendcontext = qp_to_send_context(qp, priv->s_sc); |
|
ps->s_txreq->psc = priv->s_sendcontext; |
|
/* disarm any ahg */ |
|
priv->s_ahg->ahgcount = 0; |
|
priv->s_ahg->ahgidx = 0; |
|
priv->s_ahg->tx_flags = 0; |
|
|
|
return 1; |
|
|
|
done_free_tx: |
|
hfi1_put_txreq(ps->s_txreq); |
|
ps->s_txreq = NULL; |
|
return 1; |
|
|
|
bail: |
|
hfi1_put_txreq(ps->s_txreq); |
|
|
|
bail_no_tx: |
|
ps->s_txreq = NULL; |
|
qp->s_flags &= ~RVT_S_BUSY; |
|
return 0; |
|
} |
|
|
|
/* |
|
* Hardware can't check this so we do it here. |
|
* |
|
* This is a slightly different algorithm than the standard pkey check. It |
|
* special cases the management keys and allows for 0x7fff and 0xffff to be in |
|
* the table at the same time. |
|
* |
|
* @returns the index found or -1 if not found |
|
*/ |
|
int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey) |
|
{ |
|
struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); |
|
unsigned i; |
|
|
|
if (pkey == FULL_MGMT_P_KEY || pkey == LIM_MGMT_P_KEY) { |
|
unsigned lim_idx = -1; |
|
|
|
for (i = 0; i < ARRAY_SIZE(ppd->pkeys); ++i) { |
|
/* here we look for an exact match */ |
|
if (ppd->pkeys[i] == pkey) |
|
return i; |
|
if (ppd->pkeys[i] == LIM_MGMT_P_KEY) |
|
lim_idx = i; |
|
} |
|
|
|
/* did not find 0xffff return 0x7fff idx if found */ |
|
if (pkey == FULL_MGMT_P_KEY) |
|
return lim_idx; |
|
|
|
/* no match... */ |
|
return -1; |
|
} |
|
|
|
pkey &= 0x7fff; /* remove limited/full membership bit */ |
|
|
|
for (i = 0; i < ARRAY_SIZE(ppd->pkeys); ++i) |
|
if ((ppd->pkeys[i] & 0x7fff) == pkey) |
|
return i; |
|
|
|
/* |
|
* Should not get here, this means hardware failed to validate pkeys. |
|
*/ |
|
return -1; |
|
} |
|
|
|
void return_cnp_16B(struct hfi1_ibport *ibp, struct rvt_qp *qp, |
|
u32 remote_qpn, u16 pkey, u32 slid, u32 dlid, |
|
u8 sc5, const struct ib_grh *old_grh) |
|
{ |
|
u64 pbc, pbc_flags = 0; |
|
u32 bth0, plen, vl, hwords = 7; |
|
u16 len; |
|
u8 l4; |
|
struct hfi1_opa_header hdr; |
|
struct ib_other_headers *ohdr; |
|
struct pio_buf *pbuf; |
|
struct send_context *ctxt = qp_to_send_context(qp, sc5); |
|
struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); |
|
u32 nwords; |
|
|
|
hdr.hdr_type = HFI1_PKT_TYPE_16B; |
|
/* Populate length */ |
|
nwords = ((hfi1_get_16b_padding(hwords << 2, 0) + |
|
SIZE_OF_LT) >> 2) + SIZE_OF_CRC; |
|
if (old_grh) { |
|
struct ib_grh *grh = &hdr.opah.u.l.grh; |
|
|
|
grh->version_tclass_flow = old_grh->version_tclass_flow; |
|
grh->paylen = cpu_to_be16( |
|
(hwords - LRH_16B_DWORDS + nwords) << 2); |
|
grh->hop_limit = 0xff; |
|
grh->sgid = old_grh->dgid; |
|
grh->dgid = old_grh->sgid; |
|
ohdr = &hdr.opah.u.l.oth; |
|
l4 = OPA_16B_L4_IB_GLOBAL; |
|
hwords += sizeof(struct ib_grh) / sizeof(u32); |
|
} else { |
|
ohdr = &hdr.opah.u.oth; |
|
l4 = OPA_16B_L4_IB_LOCAL; |
|
} |
|
|
|
/* BIT 16 to 19 is TVER. Bit 20 to 22 is pad cnt */ |
|
bth0 = (IB_OPCODE_CNP << 24) | (1 << 16) | |
|
(hfi1_get_16b_padding(hwords << 2, 0) << 20); |
|
ohdr->bth[0] = cpu_to_be32(bth0); |
|
|
|
ohdr->bth[1] = cpu_to_be32(remote_qpn); |
|
ohdr->bth[2] = 0; /* PSN 0 */ |
|
|
|
/* Convert dwords to flits */ |
|
len = (hwords + nwords) >> 1; |
|
hfi1_make_16b_hdr(&hdr.opah, slid, dlid, len, pkey, 1, 0, l4, sc5); |
|
|
|
plen = 2 /* PBC */ + hwords + nwords; |
|
pbc_flags |= PBC_PACKET_BYPASS | PBC_INSERT_BYPASS_ICRC; |
|
vl = sc_to_vlt(ppd->dd, sc5); |
|
pbc = create_pbc(ppd, pbc_flags, qp->srate_mbps, vl, plen); |
|
if (ctxt) { |
|
pbuf = sc_buffer_alloc(ctxt, plen, NULL, NULL); |
|
if (!IS_ERR_OR_NULL(pbuf)) { |
|
trace_pio_output_ibhdr(ppd->dd, &hdr, sc5); |
|
ppd->dd->pio_inline_send(ppd->dd, pbuf, pbc, |
|
&hdr, hwords); |
|
} |
|
} |
|
} |
|
|
|
void return_cnp(struct hfi1_ibport *ibp, struct rvt_qp *qp, u32 remote_qpn, |
|
u16 pkey, u32 slid, u32 dlid, u8 sc5, |
|
const struct ib_grh *old_grh) |
|
{ |
|
u64 pbc, pbc_flags = 0; |
|
u32 bth0, plen, vl, hwords = 5; |
|
u16 lrh0; |
|
u8 sl = ibp->sc_to_sl[sc5]; |
|
struct hfi1_opa_header hdr; |
|
struct ib_other_headers *ohdr; |
|
struct pio_buf *pbuf; |
|
struct send_context *ctxt = qp_to_send_context(qp, sc5); |
|
struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); |
|
|
|
hdr.hdr_type = HFI1_PKT_TYPE_9B; |
|
if (old_grh) { |
|
struct ib_grh *grh = &hdr.ibh.u.l.grh; |
|
|
|
grh->version_tclass_flow = old_grh->version_tclass_flow; |
|
grh->paylen = cpu_to_be16( |
|
(hwords - LRH_9B_DWORDS + SIZE_OF_CRC) << 2); |
|
grh->hop_limit = 0xff; |
|
grh->sgid = old_grh->dgid; |
|
grh->dgid = old_grh->sgid; |
|
ohdr = &hdr.ibh.u.l.oth; |
|
lrh0 = HFI1_LRH_GRH; |
|
hwords += sizeof(struct ib_grh) / sizeof(u32); |
|
} else { |
|
ohdr = &hdr.ibh.u.oth; |
|
lrh0 = HFI1_LRH_BTH; |
|
} |
|
|
|
lrh0 |= (sc5 & 0xf) << 12 | sl << 4; |
|
|
|
bth0 = pkey | (IB_OPCODE_CNP << 24); |
|
ohdr->bth[0] = cpu_to_be32(bth0); |
|
|
|
ohdr->bth[1] = cpu_to_be32(remote_qpn | (1 << IB_BECN_SHIFT)); |
|
ohdr->bth[2] = 0; /* PSN 0 */ |
|
|
|
hfi1_make_ib_hdr(&hdr.ibh, lrh0, hwords + SIZE_OF_CRC, dlid, slid); |
|
plen = 2 /* PBC */ + hwords; |
|
pbc_flags |= (ib_is_sc5(sc5) << PBC_DC_INFO_SHIFT); |
|
vl = sc_to_vlt(ppd->dd, sc5); |
|
pbc = create_pbc(ppd, pbc_flags, qp->srate_mbps, vl, plen); |
|
if (ctxt) { |
|
pbuf = sc_buffer_alloc(ctxt, plen, NULL, NULL); |
|
if (!IS_ERR_OR_NULL(pbuf)) { |
|
trace_pio_output_ibhdr(ppd->dd, &hdr, sc5); |
|
ppd->dd->pio_inline_send(ppd->dd, pbuf, pbc, |
|
&hdr, hwords); |
|
} |
|
} |
|
} |
|
|
|
/* |
|
* opa_smp_check() - Do the regular pkey checking, and the additional |
|
* checks for SMPs specified in OPAv1 rev 1.0, 9/19/2016 update, section |
|
* 9.10.25 ("SMA Packet Checks"). |
|
* |
|
* Note that: |
|
* - Checks are done using the pkey directly from the packet's BTH, |
|
* and specifically _not_ the pkey that we attach to the completion, |
|
* which may be different. |
|
* - These checks are specifically for "non-local" SMPs (i.e., SMPs |
|
* which originated on another node). SMPs which are sent from, and |
|
* destined to this node are checked in opa_local_smp_check(). |
|
* |
|
* At the point where opa_smp_check() is called, we know: |
|
* - destination QP is QP0 |
|
* |
|
* opa_smp_check() returns 0 if all checks succeed, 1 otherwise. |
|
*/ |
|
static int opa_smp_check(struct hfi1_ibport *ibp, u16 pkey, u8 sc5, |
|
struct rvt_qp *qp, u16 slid, struct opa_smp *smp) |
|
{ |
|
struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); |
|
|
|
/* |
|
* I don't think it's possible for us to get here with sc != 0xf, |
|
* but check it to be certain. |
|
*/ |
|
if (sc5 != 0xf) |
|
return 1; |
|
|
|
if (rcv_pkey_check(ppd, pkey, sc5, slid)) |
|
return 1; |
|
|
|
/* |
|
* At this point we know (and so don't need to check again) that |
|
* the pkey is either LIM_MGMT_P_KEY, or FULL_MGMT_P_KEY |
|
* (see ingress_pkey_check). |
|
*/ |
|
if (smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE && |
|
smp->mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED) { |
|
ingress_pkey_table_fail(ppd, pkey, slid); |
|
return 1; |
|
} |
|
|
|
/* |
|
* SMPs fall into one of four (disjoint) categories: |
|
* SMA request, SMA response, SMA trap, or SMA trap repress. |
|
* Our response depends, in part, on which type of SMP we're |
|
* processing. |
|
* |
|
* If this is an SMA response, skip the check here. |
|
* |
|
* If this is an SMA request or SMA trap repress: |
|
* - pkey != FULL_MGMT_P_KEY => |
|
* increment port recv constraint errors, drop MAD |
|
* |
|
* Otherwise: |
|
* - accept if the port is running an SM |
|
* - drop MAD if it's an SMA trap |
|
* - pkey == FULL_MGMT_P_KEY => |
|
* reply with unsupported method |
|
* - pkey != FULL_MGMT_P_KEY => |
|
* increment port recv constraint errors, drop MAD |
|
*/ |
|
switch (smp->method) { |
|
case IB_MGMT_METHOD_GET_RESP: |
|
case IB_MGMT_METHOD_REPORT_RESP: |
|
break; |
|
case IB_MGMT_METHOD_GET: |
|
case IB_MGMT_METHOD_SET: |
|
case IB_MGMT_METHOD_REPORT: |
|
case IB_MGMT_METHOD_TRAP_REPRESS: |
|
if (pkey != FULL_MGMT_P_KEY) { |
|
ingress_pkey_table_fail(ppd, pkey, slid); |
|
return 1; |
|
} |
|
break; |
|
default: |
|
if (ibp->rvp.port_cap_flags & IB_PORT_SM) |
|
return 0; |
|
if (smp->method == IB_MGMT_METHOD_TRAP) |
|
return 1; |
|
if (pkey == FULL_MGMT_P_KEY) { |
|
smp->status |= IB_SMP_UNSUP_METHOD; |
|
return 0; |
|
} |
|
ingress_pkey_table_fail(ppd, pkey, slid); |
|
return 1; |
|
} |
|
return 0; |
|
} |
|
|
|
/** |
|
* hfi1_ud_rcv - receive an incoming UD packet |
|
* @packet: the packet structure |
|
* |
|
* This is called from qp_rcv() to process an incoming UD packet |
|
* for the given QP. |
|
* Called at interrupt level. |
|
*/ |
|
void hfi1_ud_rcv(struct hfi1_packet *packet) |
|
{ |
|
u32 hdrsize = packet->hlen; |
|
struct ib_wc wc; |
|
u32 src_qp; |
|
u16 pkey; |
|
int mgmt_pkey_idx = -1; |
|
struct hfi1_ibport *ibp = rcd_to_iport(packet->rcd); |
|
struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); |
|
void *data = packet->payload; |
|
u32 tlen = packet->tlen; |
|
struct rvt_qp *qp = packet->qp; |
|
u8 sc5 = packet->sc; |
|
u8 sl_from_sc; |
|
u8 opcode = packet->opcode; |
|
u8 sl = packet->sl; |
|
u32 dlid = packet->dlid; |
|
u32 slid = packet->slid; |
|
u8 extra_bytes; |
|
u8 l4 = 0; |
|
bool dlid_is_permissive; |
|
bool slid_is_permissive; |
|
bool solicited = false; |
|
|
|
extra_bytes = packet->pad + packet->extra_byte + (SIZE_OF_CRC << 2); |
|
|
|
if (packet->etype == RHF_RCV_TYPE_BYPASS) { |
|
u32 permissive_lid = |
|
opa_get_lid(be32_to_cpu(OPA_LID_PERMISSIVE), 16B); |
|
|
|
l4 = hfi1_16B_get_l4(packet->hdr); |
|
pkey = hfi1_16B_get_pkey(packet->hdr); |
|
dlid_is_permissive = (dlid == permissive_lid); |
|
slid_is_permissive = (slid == permissive_lid); |
|
} else { |
|
pkey = ib_bth_get_pkey(packet->ohdr); |
|
dlid_is_permissive = (dlid == be16_to_cpu(IB_LID_PERMISSIVE)); |
|
slid_is_permissive = (slid == be16_to_cpu(IB_LID_PERMISSIVE)); |
|
} |
|
sl_from_sc = ibp->sc_to_sl[sc5]; |
|
|
|
if (likely(l4 != OPA_16B_L4_FM)) { |
|
src_qp = ib_get_sqpn(packet->ohdr); |
|
solicited = ib_bth_is_solicited(packet->ohdr); |
|
} else { |
|
src_qp = hfi1_16B_get_src_qpn(packet->mgmt); |
|
} |
|
|
|
process_ecn(qp, packet); |
|
/* |
|
* Get the number of bytes the message was padded by |
|
* and drop incomplete packets. |
|
*/ |
|
if (unlikely(tlen < (hdrsize + extra_bytes))) |
|
goto drop; |
|
|
|
tlen -= hdrsize + extra_bytes; |
|
|
|
/* |
|
* Check that the permissive LID is only used on QP0 |
|
* and the QKEY matches (see 9.6.1.4.1 and 9.6.1.5.1). |
|
*/ |
|
if (qp->ibqp.qp_num) { |
|
if (unlikely(dlid_is_permissive || slid_is_permissive)) |
|
goto drop; |
|
if (qp->ibqp.qp_num > 1) { |
|
if (unlikely(rcv_pkey_check(ppd, pkey, sc5, slid))) { |
|
/* |
|
* Traps will not be sent for packets dropped |
|
* by the HW. This is fine, as sending trap |
|
* for invalid pkeys is optional according to |
|
* IB spec (release 1.3, section 10.9.4) |
|
*/ |
|
hfi1_bad_pkey(ibp, |
|
pkey, sl, |
|
src_qp, qp->ibqp.qp_num, |
|
slid, dlid); |
|
return; |
|
} |
|
} else { |
|
/* GSI packet */ |
|
mgmt_pkey_idx = hfi1_lookup_pkey_idx(ibp, pkey); |
|
if (mgmt_pkey_idx < 0) |
|
goto drop; |
|
} |
|
if (unlikely(l4 != OPA_16B_L4_FM && |
|
ib_get_qkey(packet->ohdr) != qp->qkey)) |
|
return; /* Silent drop */ |
|
|
|
/* Drop invalid MAD packets (see 13.5.3.1). */ |
|
if (unlikely(qp->ibqp.qp_num == 1 && |
|
(tlen > 2048 || (sc5 == 0xF)))) |
|
goto drop; |
|
} else { |
|
/* Received on QP0, and so by definition, this is an SMP */ |
|
struct opa_smp *smp = (struct opa_smp *)data; |
|
|
|
if (opa_smp_check(ibp, pkey, sc5, qp, slid, smp)) |
|
goto drop; |
|
|
|
if (tlen > 2048) |
|
goto drop; |
|
if ((dlid_is_permissive || slid_is_permissive) && |
|
smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) |
|
goto drop; |
|
|
|
/* look up SMI pkey */ |
|
mgmt_pkey_idx = hfi1_lookup_pkey_idx(ibp, pkey); |
|
if (mgmt_pkey_idx < 0) |
|
goto drop; |
|
} |
|
|
|
if (qp->ibqp.qp_num > 1 && |
|
opcode == IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE) { |
|
wc.ex.imm_data = packet->ohdr->u.ud.imm_data; |
|
wc.wc_flags = IB_WC_WITH_IMM; |
|
} else if (opcode == IB_OPCODE_UD_SEND_ONLY) { |
|
wc.ex.imm_data = 0; |
|
wc.wc_flags = 0; |
|
} else { |
|
goto drop; |
|
} |
|
|
|
/* |
|
* A GRH is expected to precede the data even if not |
|
* present on the wire. |
|
*/ |
|
wc.byte_len = tlen + sizeof(struct ib_grh); |
|
|
|
/* |
|
* Get the next work request entry to find where to put the data. |
|
*/ |
|
if (qp->r_flags & RVT_R_REUSE_SGE) { |
|
qp->r_flags &= ~RVT_R_REUSE_SGE; |
|
} else { |
|
int ret; |
|
|
|
ret = rvt_get_rwqe(qp, false); |
|
if (ret < 0) { |
|
rvt_rc_error(qp, IB_WC_LOC_QP_OP_ERR); |
|
return; |
|
} |
|
if (!ret) { |
|
if (qp->ibqp.qp_num == 0) |
|
ibp->rvp.n_vl15_dropped++; |
|
return; |
|
} |
|
} |
|
/* Silently drop packets which are too big. */ |
|
if (unlikely(wc.byte_len > qp->r_len)) { |
|
qp->r_flags |= RVT_R_REUSE_SGE; |
|
goto drop; |
|
} |
|
if (packet->grh) { |
|
rvt_copy_sge(qp, &qp->r_sge, packet->grh, |
|
sizeof(struct ib_grh), true, false); |
|
wc.wc_flags |= IB_WC_GRH; |
|
} else if (packet->etype == RHF_RCV_TYPE_BYPASS) { |
|
struct ib_grh grh; |
|
/* |
|
* Assuming we only created 16B on the send side |
|
* if we want to use large LIDs, since GRH was stripped |
|
* out when creating 16B, add back the GRH here. |
|
*/ |
|
hfi1_make_ext_grh(packet, &grh, slid, dlid); |
|
rvt_copy_sge(qp, &qp->r_sge, &grh, |
|
sizeof(struct ib_grh), true, false); |
|
wc.wc_flags |= IB_WC_GRH; |
|
} else { |
|
rvt_skip_sge(&qp->r_sge, sizeof(struct ib_grh), true); |
|
} |
|
rvt_copy_sge(qp, &qp->r_sge, data, wc.byte_len - sizeof(struct ib_grh), |
|
true, false); |
|
rvt_put_ss(&qp->r_sge); |
|
if (!test_and_clear_bit(RVT_R_WRID_VALID, &qp->r_aflags)) |
|
return; |
|
wc.wr_id = qp->r_wr_id; |
|
wc.status = IB_WC_SUCCESS; |
|
wc.opcode = IB_WC_RECV; |
|
wc.vendor_err = 0; |
|
wc.qp = &qp->ibqp; |
|
wc.src_qp = src_qp; |
|
|
|
if (qp->ibqp.qp_type == IB_QPT_GSI || |
|
qp->ibqp.qp_type == IB_QPT_SMI) { |
|
if (mgmt_pkey_idx < 0) { |
|
if (net_ratelimit()) { |
|
struct hfi1_devdata *dd = ppd->dd; |
|
|
|
dd_dev_err(dd, "QP type %d mgmt_pkey_idx < 0 and packet not dropped???\n", |
|
qp->ibqp.qp_type); |
|
mgmt_pkey_idx = 0; |
|
} |
|
} |
|
wc.pkey_index = (unsigned)mgmt_pkey_idx; |
|
} else { |
|
wc.pkey_index = 0; |
|
} |
|
if (slid_is_permissive) |
|
slid = be32_to_cpu(OPA_LID_PERMISSIVE); |
|
wc.slid = slid & U16_MAX; |
|
wc.sl = sl_from_sc; |
|
|
|
/* |
|
* Save the LMC lower bits if the destination LID is a unicast LID. |
|
*/ |
|
wc.dlid_path_bits = hfi1_check_mcast(dlid) ? 0 : |
|
dlid & ((1 << ppd_from_ibp(ibp)->lmc) - 1); |
|
wc.port_num = qp->port_num; |
|
/* Signal completion event if the solicited bit is set. */ |
|
rvt_recv_cq(qp, &wc, solicited); |
|
return; |
|
|
|
drop: |
|
ibp->rvp.n_pkt_drops++; |
|
}
|
|
|