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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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5da0fc9dbf
Current implementation allows each qp to have only one send engine. As such, each qp has only one list to queue prebuilt packets when send engine resources are not available. To improve performance, it is desired to support multiple send engines for each qp. This patch creates the framework to support two send engines (two legs) for each qp for the TID RDMA protocol, which can be easily extended to support more send engines. It achieves the goal by creating a leg specific struct, iowait_work in the iowait struct, to hold the work_struct and the tx_list as well as a pointer to the parent iowait struct. The hfi1_pkt_state now has an additional field to record the current legs work structure and that is now passed to all egress waiters to determine the leg that needs to wait via a new iowait helper. The APIs are adjusted to use the new leg specific struct as required. Many new and modified helpers are added to support this change. Reviewed-by: Mitko Haralanov <mitko.haralanov@intel.com> Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Kaike Wan <kaike.wan@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
125 lines
3.9 KiB
C
125 lines
3.9 KiB
C
/*
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* Copyright(c) 2016 - 2018 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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#ifndef HFI1_VERBS_TXREQ_H
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#define HFI1_VERBS_TXREQ_H
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#include <linux/types.h>
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#include <linux/slab.h>
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#include "verbs.h"
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#include "sdma_txreq.h"
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#include "iowait.h"
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struct verbs_txreq {
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struct hfi1_sdma_header phdr;
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struct sdma_txreq txreq;
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struct rvt_qp *qp;
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struct rvt_swqe *wqe;
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struct rvt_mregion *mr;
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struct rvt_sge_state *ss;
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struct sdma_engine *sde;
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struct send_context *psc;
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u16 hdr_dwords;
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u16 s_cur_size;
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};
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struct hfi1_ibdev;
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struct verbs_txreq *__get_txreq(struct hfi1_ibdev *dev,
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struct rvt_qp *qp);
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static inline struct verbs_txreq *get_txreq(struct hfi1_ibdev *dev,
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struct rvt_qp *qp)
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__must_hold(&qp->slock)
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{
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struct verbs_txreq *tx;
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struct hfi1_qp_priv *priv = qp->priv;
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tx = kmem_cache_alloc(dev->verbs_txreq_cache, GFP_ATOMIC);
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if (unlikely(!tx)) {
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/* call slow path to get the lock */
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tx = __get_txreq(dev, qp);
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if (!tx)
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return tx;
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}
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tx->qp = qp;
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tx->mr = NULL;
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tx->sde = priv->s_sde;
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tx->psc = priv->s_sendcontext;
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/* so that we can test if the sdma decriptors are there */
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tx->txreq.num_desc = 0;
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/* Set the header type */
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tx->phdr.hdr.hdr_type = priv->hdr_type;
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return tx;
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}
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static inline struct sdma_txreq *get_sdma_txreq(struct verbs_txreq *tx)
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{
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return &tx->txreq;
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}
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static inline struct verbs_txreq *get_waiting_verbs_txreq(struct iowait_work *w)
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{
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struct sdma_txreq *stx;
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stx = iowait_get_txhead(w);
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if (stx)
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return container_of(stx, struct verbs_txreq, txreq);
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return NULL;
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}
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static inline bool verbs_txreq_queued(struct iowait_work *w)
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{
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return iowait_packet_queued(w);
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}
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void hfi1_put_txreq(struct verbs_txreq *tx);
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int verbs_txreq_init(struct hfi1_ibdev *dev);
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void verbs_txreq_exit(struct hfi1_ibdev *dev);
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#endif /* HFI1_VERBS_TXREQ_H */
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