Differential D31150 Diff 92098 sys/dev/mana/gdma_util.c

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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);
				}