mirror of
https://github.com/torvalds/linux.git
synced 2024-11-12 15:11:50 +00:00
6f6387ae75
Brings in completion queue functionality. A kthread worker is added to the rvt_dev_info to serve as a worker for completion queues. Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Reviewed-by: Harish Chegondi <harish.chegondi@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
100 lines
3.4 KiB
C
100 lines
3.4 KiB
C
#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 */
|