112 lines
3.8 KiB
C
112 lines
3.8 KiB
C
#ifndef DEF_RDMAVT_INCCQ_H
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#define DEF_RDMAVT_INCCQ_H
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/*
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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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* Copyright(c) 2016 - 2018 Intel Corporation.
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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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* Copyright(c) 2015 Intel Corporation.
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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/kthread.h>
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#include <rdma/ib_user_verbs.h>
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/*
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* Define an ib_cq_notify value that is not valid so we know when CQ
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* notifications are armed.
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*/
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#define RVT_CQ_NONE (IB_CQ_NEXT_COMP + 1)
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/*
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* Define read macro that apply smp_load_acquire memory barrier
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* when reading indice of circular buffer that mmaped to user space.
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*/
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#define RDMA_READ_UAPI_ATOMIC(member) smp_load_acquire(&(member).val)
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/*
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* Define write macro that uses smp_store_release memory barrier
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* when writing indice of circular buffer that mmaped to user space.
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*/
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#define RDMA_WRITE_UAPI_ATOMIC(member, x) smp_store_release(&(member).val, x)
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#include <rdma/rvt-abi.h>
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/*
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* This structure is used to contain the head pointer, tail pointer,
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* and completion queue entries as a single memory allocation so
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* it can be mmap'ed into user space.
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*/
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struct rvt_k_cq_wc {
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u32 head; /* index of next entry to fill */
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u32 tail; /* index of next ib_poll_cq() entry */
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struct ib_wc kqueue[];
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};
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/*
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* The completion queue structure.
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*/
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struct rvt_cq {
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struct ib_cq ibcq;
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struct work_struct comptask;
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spinlock_t lock; /* protect changes in this struct */
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u8 notify;
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u8 triggered;
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u8 cq_full;
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int comp_vector_cpu;
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struct rvt_dev_info *rdi;
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struct rvt_cq_wc *queue;
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struct rvt_mmap_info *ip;
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struct rvt_k_cq_wc *kqueue;
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};
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static inline struct rvt_cq *ibcq_to_rvtcq(struct ib_cq *ibcq)
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{
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return container_of(ibcq, struct rvt_cq, ibcq);
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}
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bool rvt_cq_enter(struct rvt_cq *cq, struct ib_wc *entry, bool solicited);
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#endif /* DEF_RDMAVT_INCCQH */
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