LXR linux/include/rdma/rdmavt

   1#ifndef DEF_RDMAVT_INCCQ_H
   2#define DEF_RDMAVT_INCCQ_H
   3
   4/*
   5 *
   6 * This file is provided under a dual BSD/GPLv2 license.  When using or
   7 * redistributing this file, you may do so under either license.
   8 *
   9 * GPL LICENSE SUMMARY
  10 *
  11 * Copyright(c) 2016 - 2018 Intel Corporation.
  12 *
  13 * This program is free software; you can redistribute it and/or modify
  14 * it under the terms of version 2 of the GNU General Public License as
  15 * published by the Free Software Foundation.
  16 *
  17 * This program is distributed in the hope that it will be useful, but
  18 * WITHOUT ANY WARRANTY; without even the implied warranty of
  19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20 * General Public License for more details.
  21 *
  22 * BSD LICENSE
  23 *
  24 * Copyright(c) 2015 Intel Corporation.
  25 *
  26 * Redistribution and use in source and binary forms, with or without
  27 * modification, are permitted provided that the following conditions
  28 * are met:
  29 *
  30 *  - Redistributions of source code must retain the above copyright
  31 *    notice, this list of conditions and the following disclaimer.
  32 *  - Redistributions in binary form must reproduce the above copyright
  33 *    notice, this list of conditions and the following disclaimer in
  34 *    the documentation and/or other materials provided with the
  35 *    distribution.
  36 *  - Neither the name of Intel Corporation nor the names of its
  37 *    contributors may be used to endorse or promote products derived
  38 *    from this software without specific prior written permission.
  39 *
  40 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  41 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  42 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  43 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  44 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  46 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  47 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  48 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  49 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  50 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  51 *
  52 */
  53
  54#include <linux/kthread.h>
  55#include <rdma/ib_user_verbs.h>
  56
  57/*
  58 * Define an ib_cq_notify value that is not valid so we know when CQ
  59 * notifications are armed.
  60 */
  61#define RVT_CQ_NONE      (IB_CQ_NEXT_COMP + 1)
  62
  63/*
  64 * This structure is used to contain the head pointer, tail pointer,
  65 * and completion queue entries as a single memory allocation so
  66 * it can be mmap'ed into user space.
  67 */
  68struct rvt_cq_wc {
  69        u32 head;               /* index of next entry to fill */
  70        u32 tail;               /* index of next ib_poll_cq() entry */
  71        union {
  72                /* these are actually size ibcq.cqe + 1 */
  73                struct ib_uverbs_wc uqueue[0];
  74                struct ib_wc kqueue[0];
  75        };
  76};
  77
  78/*
  79 * The completion queue structure.
  80 */
  81struct rvt_cq {
  82        struct ib_cq ibcq;
  83        struct work_struct comptask;
  84        spinlock_t lock; /* protect changes in this struct */
  85        u8 notify;
  86        u8 triggered;
  87        int comp_vector_cpu;
  88        struct rvt_dev_info *rdi;
  89        struct rvt_cq_wc *queue;
  90        struct rvt_mmap_info *ip;
  91};
  92
  93static inline struct rvt_cq *ibcq_to_rvtcq(struct ib_cq *ibcq)
  94{
  95        return container_of(ibcq, struct rvt_cq, ibcq);
  96}
  97
  98void rvt_cq_enter(struct rvt_cq *cq, struct ib_wc *entry, bool solicited);
  99
 100#endif          /* DEF_RDMAVT_INCCQH */
 101