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IB/rdmavt: Add completion queue functions

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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 <[email protected]>
Reviewed-by: Harish Chegondi <[email protected]>
Signed-off-by: Dennis Dalessandro <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>
This commit is contained in:
Dennis Dalessandro 2016-01-22 13:00:15 -08:00 • committed by Doug Ledford
commit 6f6387ae75
5 changed files with 561 additions and 7 deletions
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9
include/rdma/rdma_vt.h
View file

@ -138,6 +138,8 @@ struct rvt_ibport {
/* TODO: Move sm_ah and smi_ah into here as well*/
};
#define RVT_CQN_MAX 16 /* maximum length of cq name */
/*
* Things that are driver specific, module parameters in hfi1 and qib
*/
@ -190,6 +192,8 @@ struct rvt_driver_params {
int nports;
int npkeys;
u8 qos_shift;
char cq_name[RVT_CQN_MAX];
int node;
};
/* Protection domain */
@ -281,6 +285,11 @@ struct rvt_dev_info {
spinlock_t mmap_offset_lock; /* protect mmap_offset */
u32 mmap_offset;
spinlock_t pending_lock; /* protect pending mmap list */
/* CQ */
struct kthread_worker *worker; /* per device cq worker */
u32 n_cqs_allocated; /* number of CQs allocated for device */
spinlock_t n_cqs_lock; /* protect count of in use cqs */
};
static inline struct rvt_pd *ibpd_to_rvtpd(struct ib_pd *ibpd)

99
include/rdma/rdmavt_cq.h Normal file
View file

@ -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 */