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sys/dev/mana/gdma_util.c
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/*- | |||||
* SPDX-License-Identifier: BSD-2-Clause | |||||
* | |||||
* Copyright (c) 2021 Microsoft Corp. | |||||
* All rights reserved. | |||||
* | |||||
* Redistribution and use in source and binary forms, with or without | |||||
* modification, are permitted provided that the following conditions | |||||
* are met: | |||||
* | |||||
* 1. Redistributions of source code must retain the above copyright | |||||
* notice, this list of conditions and the following disclaimer. | |||||
* | |||||
* 2. 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. | |||||
* | |||||
* 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 <sys/cdefs.h> | |||||
__FBSDID("$FreeBSD$"); | |||||
#include <sys/types.h> | |||||
#include <sys/mutex.h> | |||||
#include <sys/systm.h> | |||||
#include "gdma_util.h" | |||||
void | |||||
init_completion(struct completion *c) | |||||
{ | |||||
memset(c, 0, sizeof(*c)); | |||||
mtx_init(&c->lock, "gdma_completion", NULL, MTX_DEF); | |||||
c->done = 0; | |||||
} | |||||
void | |||||
free_completion(struct completion *c) | |||||
{ | |||||
mtx_destroy(&c->lock); | |||||
} | |||||
void | |||||
complete(struct completion *c) | |||||
{ | |||||
mtx_lock(&c->lock); | |||||
c->done++; | |||||
mtx_unlock(&c->lock); | |||||
wakeup(c); | |||||
} | |||||
void | |||||
wait_for_completion(struct completion *c) | |||||
{ | |||||
mtx_lock(&c->lock); | |||||
while (c->done == 0) | |||||
mtx_sleep(c, &c->lock, 0, "gdma_wfc", 0); | |||||
c->done--; | |||||
mtx_unlock(&c->lock); | |||||
} | |||||
/* | |||||
* Return: 0 if completed, a non-zero value if timed out. | |||||
*/ | |||||
int | |||||
wait_for_completion_timeout(struct completion *c, int timeout) | |||||
{ | |||||
int ret; | |||||
mtx_lock(&c->lock); | |||||
if (c->done == 0) | |||||
mtx_sleep(c, &c->lock, 0, "gdma_wfc", timeout); | |||||
if (c->done > 0) { | |||||
c->done--; | |||||
ret = 0; | |||||
} else { | |||||
ret = 1; | |||||
} | |||||
mtx_unlock(&c->lock); | |||||
return (ret); | |||||
} |