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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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88733e3b84
Add 16B bypass packet support for UD traffic types. Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Signed-off-by: Don Hiatt <don.hiatt@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
1060 lines
30 KiB
C
1060 lines
30 KiB
C
/*
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* Copyright(c) 2015, 2016 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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#include <linux/net.h>
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#include <rdma/ib_smi.h>
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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 "qp.h"
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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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* 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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rcu_read_lock();
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qp = rvt_lookup_qpn(ib_to_rvt(sqp->ibqp.device), &ibp->rvp,
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swqe->ud_wr.remote_qpn);
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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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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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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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ah_attr = &ibah_to_rvtah(swqe->ud_wr.ah)->attr;
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ppd = ppd_from_ibp(ibp);
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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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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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* 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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qkey = (int)swqe->ud_wr.remote_qkey < 0 ?
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sqp->qkey : swqe->ud_wr.remote_qkey;
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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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* 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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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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spin_lock_irqsave(&qp->r_lock, flags);
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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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ret = hfi1_rvt_get_rwqe(qp, 0);
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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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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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* 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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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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hfi1_make_grh(ibp, &grh, &grd, 0, 0);
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hfi1_copy_sge(&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 = sge->length;
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if (len > length)
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len = length;
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if (len > sge->sge_length)
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len = sge->sge_length;
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WARN_ON_ONCE(len == 0);
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hfi1_copy_sge(&qp->r_sge, sge->vaddr, len, true, false);
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sge->vaddr += len;
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sge->length -= len;
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sge->sge_length -= len;
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if (sge->sge_length == 0) {
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if (--ssge.num_sge)
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*sge = *ssge.sg_list++;
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} else if (sge->length == 0 && sge->mr->lkey) {
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if (++sge->n >= RVT_SEGSZ) {
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if (++sge->m >= sge->mr->mapsz)
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break;
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sge->n = 0;
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}
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sge->vaddr =
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sge->mr->map[sge->m]->segs[sge->n].vaddr;
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sge->length =
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sge->mr->map[sge->m]->segs[sge->n].length;
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}
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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 = swqe->ud_wr.pkey_index;
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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));
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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_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc,
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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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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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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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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, wqe->ud_wr.pkey_index);
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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(wqe->ud_wr.remote_qpn);
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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] = cpu_to_be32((int)wqe->ud_wr.remote_qkey < 0 ?
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qp->qkey : wqe->ud_wr.remote_qkey);
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ohdr->u.ud.deth[1] = cpu_to_be32(qp->ibqp.qp_num);
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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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|
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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 = &ibah_to_rvtah(wqe->ud_wr.ah)->attr;
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|
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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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qp->s_hdrwords = 7;
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if (wqe->wr.opcode == IB_WR_SEND_WITH_IMM)
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qp->s_hdrwords++;
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|
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if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) {
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grh = &ps->s_txreq->phdr.hdr.ibh.u.l.grh;
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qp->s_hdrwords += hfi1_make_grh(ibp, grh,
|
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rdma_ah_read_grh(ah_attr),
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qp->s_hdrwords - 2, 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)];
|
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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;
|
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}
|
|
|
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dlid = opa_get_lid(rdma_ah_get_dlid(ah_attr), 9B);
|
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if (dlid == be16_to_cpu(IB_LID_PERMISSIVE)) {
|
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slid = be16_to_cpu(IB_LID_PERMISSIVE);
|
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} else {
|
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u16 lid = (u16)ppd->lid;
|
|
|
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if (lid) {
|
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lid |= rdma_ah_get_path_bits(ah_attr) &
|
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((1 << ppd->lmc) - 1);
|
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slid = lid;
|
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} else {
|
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slid = be16_to_cpu(IB_LID_PERMISSIVE);
|
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}
|
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}
|
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hfi1_make_bth_deth(qp, wqe, ohdr, &pkey, extra_bytes, false);
|
|
len = qp->s_hdrwords + nwords;
|
|
|
|
/* Setup the packet */
|
|
ps->s_txreq->phdr.hdr.hdr_type = HFI1_PKT_TYPE_9B;
|
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hfi1_make_ib_hdr(&ps->s_txreq->phdr.hdr.ibh,
|
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lrh0, len, dlid, slid);
|
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}
|
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|
|
void hfi1_make_ud_req_16B(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
|
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struct rvt_swqe *wqe)
|
|
{
|
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struct hfi1_qp_priv *priv = qp->priv;
|
|
struct ib_other_headers *ohdr;
|
|
struct rdma_ah_attr *ah_attr;
|
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struct hfi1_pportdata *ppd;
|
|
struct hfi1_ibport *ibp;
|
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u32 dlid, slid, nwords, extra_bytes;
|
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u16 len, pkey;
|
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u8 l4, sc5;
|
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|
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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 = &ibah_to_rvtah(wqe->ud_wr.ah)->attr;
|
|
/* header size in dwords 16B LRH+BTH+DETH = (16+12+8)/4. */
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qp->s_hdrwords = 9;
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if (wqe->wr.opcode == IB_WR_SEND_WITH_IMM)
|
|
qp->s_hdrwords++;
|
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|
|
/* SW provides space for CRC and LT for bypass packets. */
|
|
extra_bytes = hfi1_get_16b_padding((qp->s_hdrwords << 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;
|
|
qp->s_hdrwords += hfi1_make_grh(ibp, grh, grd,
|
|
qp->s_hdrwords - 4, 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));
|
|
|
|
hfi1_make_bth_deth(qp, wqe, ohdr, &pkey, extra_bytes, true);
|
|
/* Convert dwords to flits */
|
|
len = (qp->s_hdrwords + 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
|
|
*
|
|
* 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 (IS_ERR(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. */
|
|
smp_read_barrier_depends(); /* see post_one_send */
|
|
if (qp->s_last == ACCESS_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);
|
|
hfi1_send_complete(qp, wqe, IB_WC_WR_FLUSH_ERR);
|
|
goto done_free_tx;
|
|
}
|
|
|
|
/* see post_one_send() */
|
|
smp_read_barrier_depends();
|
|
if (qp->s_cur == ACCESS_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 = &ibah_to_rvtah(wqe->ud_wr.ah)->attr;
|
|
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;
|
|
hfi1_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;
|
|
/* pbc */
|
|
ps->s_txreq->hdr_dwords = qp->s_hdrwords + 2;
|
|
|
|
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;
|
|
qp->s_hdrwords = 0;
|
|
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, u32 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_16b_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;
|
|
|
|
/* 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.u.l.grh;
|
|
|
|
grh->version_tclass_flow = old_grh->version_tclass_flow;
|
|
grh->paylen = cpu_to_be16((hwords - 4 + nwords) << 2);
|
|
grh->hop_limit = 0xff;
|
|
grh->sgid = old_grh->dgid;
|
|
grh->dgid = old_grh->sgid;
|
|
ohdr = &hdr.u.l.oth;
|
|
l4 = OPA_16B_L4_IB_GLOBAL;
|
|
hwords += sizeof(struct ib_grh) / sizeof(u32);
|
|
} else {
|
|
ohdr = &hdr.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, 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 (pbuf)
|
|
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,
|
|
u32 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 ib_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);
|
|
|
|
if (old_grh) {
|
|
struct ib_grh *grh = &hdr.u.l.grh;
|
|
|
|
grh->version_tclass_flow = old_grh->version_tclass_flow;
|
|
grh->paylen = cpu_to_be16((hwords - 2 + SIZE_OF_CRC) << 2);
|
|
grh->hop_limit = 0xff;
|
|
grh->sgid = old_grh->dgid;
|
|
grh->dgid = old_grh->sgid;
|
|
ohdr = &hdr.u.l.oth;
|
|
lrh0 = HFI1_LRH_GRH;
|
|
hwords += sizeof(struct ib_grh) / sizeof(u32);
|
|
} else {
|
|
ohdr = &hdr.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, 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 (pbuf)
|
|
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
|
|
* @ibp: the port the packet came in on
|
|
* @hdr: the packet header
|
|
* @rcv_flags: flags relevant to rcv processing
|
|
* @data: the packet data
|
|
* @tlen: the packet length
|
|
* @qp: the QP the packet came on
|
|
*
|
|
* 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)
|
|
{
|
|
struct ib_other_headers *ohdr = packet->ohdr;
|
|
u32 hdrsize = packet->hlen;
|
|
struct ib_wc wc;
|
|
u32 qkey;
|
|
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);
|
|
struct ib_header *hdr = packet->hdr;
|
|
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;
|
|
bool dlid_is_permissive;
|
|
bool slid_is_permissive;
|
|
|
|
extra_bytes = packet->pad + packet->extra_byte + (SIZE_OF_CRC << 2);
|
|
qkey = ib_get_qkey(ohdr);
|
|
src_qp = ib_get_sqpn(ohdr);
|
|
|
|
if (packet->etype == RHF_RCV_TYPE_BYPASS) {
|
|
u32 permissive_lid =
|
|
opa_get_lid(be32_to_cpu(OPA_LID_PERMISSIVE), 16B);
|
|
|
|
pkey = hfi1_16B_get_pkey(packet->hdr);
|
|
dlid_is_permissive = (dlid == permissive_lid);
|
|
slid_is_permissive = (slid == permissive_lid);
|
|
} else {
|
|
hdr = packet->hdr;
|
|
pkey = ib_bth_get_pkey(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];
|
|
|
|
process_ecn(qp, packet, (opcode != IB_OPCODE_CNP));
|
|
/*
|
|
* 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(qkey != qp->qkey)) /* Silent drop */
|
|
return;
|
|
|
|
/* 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 = ohdr->u.ud.imm_data;
|
|
wc.wc_flags = IB_WC_WITH_IMM;
|
|
tlen -= sizeof(u32);
|
|
} 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 = hfi1_rvt_get_rwqe(qp, 0);
|
|
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) {
|
|
hfi1_copy_sge(&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);
|
|
hfi1_copy_sge(&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);
|
|
}
|
|
hfi1_copy_sge(&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;
|
|
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_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc,
|
|
(ohdr->bth[0] &
|
|
cpu_to_be32(IB_BTH_SOLICITED)) != 0);
|
|
return;
|
|
|
|
drop:
|
|
ibp->rvp.n_pkt_drops++;
|
|
}
|