/*
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* Copyright (C) 2012-2014, 2016-2017 ARM Limited. All rights reserved.
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*
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* This program is free software and is provided to you under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
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*
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* A copy of the licence is included with the program, and can also be obtained from Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/**
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* @file mali_osk_wait_queue.c
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* Implemenation of the OS abstraction layer for the kernel device driver
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*/
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#include <linux/wait.h>
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#include <linux/slab.h>
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#include <linux/sched.h>
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#include "mali_osk.h"
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#include "mali_kernel_common.h"
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struct _mali_osk_wait_queue_t_struct {
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wait_queue_head_t wait_queue;
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};
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_mali_osk_wait_queue_t *_mali_osk_wait_queue_init(void)
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{
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_mali_osk_wait_queue_t *ret = NULL;
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ret = kmalloc(sizeof(_mali_osk_wait_queue_t), GFP_KERNEL);
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if (NULL == ret) {
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return ret;
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}
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init_waitqueue_head(&ret->wait_queue);
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MALI_DEBUG_ASSERT(!waitqueue_active(&ret->wait_queue));
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return ret;
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}
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void _mali_osk_wait_queue_wait_event(_mali_osk_wait_queue_t *queue, mali_bool(*condition)(void *), void *data)
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{
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MALI_DEBUG_ASSERT_POINTER(queue);
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MALI_DEBUG_PRINT(6, ("Adding to wait queue %p\n", queue));
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wait_event(queue->wait_queue, condition(data));
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}
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void _mali_osk_wait_queue_wait_event_timeout(_mali_osk_wait_queue_t *queue, mali_bool(*condition)(void *), void *data, u32 timeout)
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{
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MALI_DEBUG_ASSERT_POINTER(queue);
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MALI_DEBUG_PRINT(6, ("Adding to wait queue %p\n", queue));
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wait_event_timeout(queue->wait_queue, condition(data), _mali_osk_time_mstoticks(timeout));
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}
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void _mali_osk_wait_queue_wake_up(_mali_osk_wait_queue_t *queue)
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{
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MALI_DEBUG_ASSERT_POINTER(queue);
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/* if queue is empty, don't attempt to wake up its elements */
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if (!waitqueue_active(&queue->wait_queue)) return;
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MALI_DEBUG_PRINT(6, ("Waking up elements in wait queue %p ....\n", queue));
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wake_up_all(&queue->wait_queue);
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MALI_DEBUG_PRINT(6, ("... elements in wait queue %p woken up\n", queue));
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}
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void _mali_osk_wait_queue_term(_mali_osk_wait_queue_t *queue)
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{
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/* Parameter validation */
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MALI_DEBUG_ASSERT_POINTER(queue);
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/* Linux requires no explicit termination of wait queues */
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kfree(queue);
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}
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