1 #ifndef DEF_RDMAVT_INCCQ_H 2 #define DEF_RDMAVT_INCCQ_H 3 4 /*- 5 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0 6 * 7 * This file is provided under a dual BSD/GPLv2 license. When using or 8 * redistributing this file, you may do so under either license. 9 * 10 * GPL LICENSE SUMMARY 11 * 12 * Copyright(c) 2016 Intel Corporation. 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of version 2 of the GNU General Public License as 16 * published by the Free Software Foundation. 17 * 18 * This program is distributed in the hope that it will be useful, but 19 * WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 21 * General Public License for more details. 22 * 23 * BSD LICENSE 24 * 25 * Copyright(c) 2015 Intel Corporation. 26 * 27 * Redistribution and use in source and binary forms, with or without 28 * modification, are permitted provided that the following conditions 29 * are met: 30 * 31 * - Redistributions of source code must retain the above copyright 32 * notice, this list of conditions and the following disclaimer. 33 * - Redistributions in binary form must reproduce the above copyright 34 * notice, this list of conditions and the following disclaimer in 35 * the documentation and/or other materials provided with the 36 * distribution. 37 * - Neither the name of Intel Corporation nor the names of its 38 * contributors may be used to endorse or promote products derived 39 * from this software without specific prior written permission. 40 * 41 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 42 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 43 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 44 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 45 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 46 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 47 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 48 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 49 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 50 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 51 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 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 */ 68 struct 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 */ 81 struct rvt_cq { 82 struct ib_cq ibcq; 83 struct kthread_work comptask; 84 spinlock_t lock; /* protect changes in this struct */ 85 u8 notify; 86 u8 triggered; 87 struct rvt_dev_info *rdi; 88 struct rvt_cq_wc *queue; 89 struct rvt_mmap_info *ip; 90 }; 91 92 static inline struct rvt_cq *ibcq_to_rvtcq(struct ib_cq *ibcq) 93 { 94 return container_of(ibcq, struct rvt_cq, ibcq); 95 } 96 97 void rvt_cq_enter(struct rvt_cq *cq, struct ib_wc *entry, bool solicited); 98 99 #endif /* DEF_RDMAVT_INCCQH */ 100