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Diffstat (limited to 'include/rdma/rdmavt_cq.h')
| -rw-r--r-- | include/rdma/rdmavt_cq.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/include/rdma/rdmavt_cq.h b/include/rdma/rdmavt_cq.h new file mode 100644 index 000000000..51fd00b24 --- /dev/null +++ b/include/rdma/rdmavt_cq.h @@ -0,0 +1,99 @@ +#ifndef DEF_RDMAVT_INCCQ_H +#define DEF_RDMAVT_INCCQ_H + +/* + * + * 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. + * + */ + +#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 */ |