142 lines
4.3 KiB
C
142 lines
4.3 KiB
C
/*
|
|
* Copyright(c) 2016 - 2017 Intel Corporation.
|
|
*
|
|
* 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
|
|
*
|
|
* 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
|
|
*
|
|
* 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 "hfi.h"
|
|
#include "verbs_txreq.h"
|
|
#include "qp.h"
|
|
#include "trace.h"
|
|
|
|
#define TXREQ_LEN 24
|
|
|
|
void hfi1_put_txreq(struct verbs_txreq *tx)
|
|
{
|
|
struct hfi1_ibdev *dev;
|
|
struct rvt_qp *qp;
|
|
unsigned long flags;
|
|
unsigned int seq;
|
|
struct hfi1_qp_priv *priv;
|
|
|
|
qp = tx->qp;
|
|
dev = to_idev(qp->ibqp.device);
|
|
|
|
if (tx->mr)
|
|
rvt_put_mr(tx->mr);
|
|
|
|
sdma_txclean(dd_from_dev(dev), &tx->txreq);
|
|
|
|
/* Free verbs_txreq and return to slab cache */
|
|
kmem_cache_free(dev->verbs_txreq_cache, tx);
|
|
|
|
do {
|
|
seq = read_seqbegin(&dev->txwait_lock);
|
|
if (!list_empty(&dev->txwait)) {
|
|
struct iowait *wait;
|
|
|
|
write_seqlock_irqsave(&dev->txwait_lock, flags);
|
|
wait = list_first_entry(&dev->txwait, struct iowait,
|
|
list);
|
|
qp = iowait_to_qp(wait);
|
|
priv = qp->priv;
|
|
list_del_init(&priv->s_iowait.list);
|
|
/* refcount held until actual wake up */
|
|
write_sequnlock_irqrestore(&dev->txwait_lock, flags);
|
|
hfi1_qp_wakeup(qp, RVT_S_WAIT_TX);
|
|
break;
|
|
}
|
|
} while (read_seqretry(&dev->txwait_lock, seq));
|
|
}
|
|
|
|
struct verbs_txreq *__get_txreq(struct hfi1_ibdev *dev,
|
|
struct rvt_qp *qp)
|
|
__must_hold(&qp->s_lock)
|
|
{
|
|
struct verbs_txreq *tx = ERR_PTR(-EBUSY);
|
|
|
|
write_seqlock(&dev->txwait_lock);
|
|
if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) {
|
|
struct hfi1_qp_priv *priv;
|
|
|
|
tx = kmem_cache_alloc(dev->verbs_txreq_cache, GFP_ATOMIC);
|
|
if (tx)
|
|
goto out;
|
|
priv = qp->priv;
|
|
if (list_empty(&priv->s_iowait.list)) {
|
|
dev->n_txwait++;
|
|
qp->s_flags |= RVT_S_WAIT_TX;
|
|
list_add_tail(&priv->s_iowait.list, &dev->txwait);
|
|
priv->s_iowait.lock = &dev->txwait_lock;
|
|
trace_hfi1_qpsleep(qp, RVT_S_WAIT_TX);
|
|
rvt_get_qp(qp);
|
|
}
|
|
qp->s_flags &= ~RVT_S_BUSY;
|
|
}
|
|
out:
|
|
write_sequnlock(&dev->txwait_lock);
|
|
return tx;
|
|
}
|
|
|
|
int verbs_txreq_init(struct hfi1_ibdev *dev)
|
|
{
|
|
char buf[TXREQ_LEN];
|
|
struct hfi1_devdata *dd = dd_from_dev(dev);
|
|
|
|
snprintf(buf, sizeof(buf), "hfi1_%u_vtxreq_cache", dd->unit);
|
|
dev->verbs_txreq_cache = kmem_cache_create(buf,
|
|
sizeof(struct verbs_txreq),
|
|
0, SLAB_HWCACHE_ALIGN,
|
|
NULL);
|
|
if (!dev->verbs_txreq_cache)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
void verbs_txreq_exit(struct hfi1_ibdev *dev)
|
|
{
|
|
kmem_cache_destroy(dev->verbs_txreq_cache);
|
|
dev->verbs_txreq_cache = NULL;
|
|
}
|