FreeBSD/Linux Kernel Cross Reference
sys/ofed/include/rdma/rdmavt_cq.h

     #ifndef DEF_RDMAVT_INCCQ_H
     #define DEF_RDMAVT_INCCQ_H
     
     /*-
      * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
      *
      * This file is provided under a dual BSD/GPLv2 license.  When using or
      * redistributing this file, you may do so under either license.
      *
     * GPL LICENSE SUMMARY
     *
     * Copyright(c) 2016 Intel Corporation.
     *
     * This program is free software; you can redistribute it and/or modify
     * it under the terms of version 2 of the GNU General Public License as
     * published by the Free Software Foundation.
     *
     * This program is distributed in the hope that it will be useful, but
     * WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     * General Public License for more details.
     *
     * BSD LICENSE
     *
     * Copyright(c) 2015 Intel Corporation.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     *
     *  - Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     *  - Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in
     *    the documentation and/or other materials provided with the
     *    distribution.
     *  - Neither the name of Intel Corporation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    #include <linux/kthread.h>
    #include <rdma/ib_user_verbs.h>
    
    /*
     * Define an ib_cq_notify value that is not valid so we know when CQ
     * notifications are armed.
     */
    #define RVT_CQ_NONE      (IB_CQ_NEXT_COMP + 1)
    
    /*
     * This structure is used to contain the head pointer, tail pointer,
     * and completion queue entries as a single memory allocation so
     * it can be mmap'ed into user space.
     */
    struct rvt_cq_wc {
            u32 head;               /* index of next entry to fill */
            u32 tail;               /* index of next ib_poll_cq() entry */
            union {
                    /* these are actually size ibcq.cqe + 1 */
                    struct ib_uverbs_wc uqueue[0];
                    struct ib_wc kqueue[0];
            };
    };
    
    /*
     * The completion queue structure.
     */
    struct rvt_cq {
            struct ib_cq ibcq;
            struct kthread_work comptask;
            spinlock_t lock; /* protect changes in this struct */
            u8 notify;
            u8 triggered;
            struct rvt_dev_info *rdi;
            struct rvt_cq_wc *queue;
            struct rvt_mmap_info *ip;
    };
    
    static inline struct rvt_cq *ibcq_to_rvtcq(struct ib_cq *ibcq)
    {
            return container_of(ibcq, struct rvt_cq, ibcq);
    }
    
    void rvt_cq_enter(struct rvt_cq *cq, struct ib_wc *entry, bool solicited);
   
   #endif          /* DEF_RDMAVT_INCCQH */

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