diff options
Diffstat (limited to 'drivers/gpu/mali400/r3p2/mali/linux/mali_osk_wait_queue.c')
-rw-r--r-- | drivers/gpu/mali400/r3p2/mali/linux/mali_osk_wait_queue.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/drivers/gpu/mali400/r3p2/mali/linux/mali_osk_wait_queue.c b/drivers/gpu/mali400/r3p2/mali/linux/mali_osk_wait_queue.c new file mode 100644 index 0000000..ce0561d --- /dev/null +++ b/drivers/gpu/mali400/r3p2/mali/linux/mali_osk_wait_queue.c @@ -0,0 +1,73 @@ +/* + * Copyright (C) 2012 ARM Limited. All rights reserved. + * + * This program is free software and is provided to you under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence. + * + * A copy of the licence is included with the program, and can also be obtained from Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +/** + * @file mali_osk_wait_queue.c + * Implemenation of the OS abstraction layer for the kernel device driver + */ + +#include <linux/wait.h> +#include <linux/slab.h> +#include <linux/sched.h> + +#include "mali_osk.h" +#include "mali_kernel_common.h" + +struct _mali_osk_wait_queue_t_struct +{ + wait_queue_head_t wait_queue; +}; + +_mali_osk_wait_queue_t* _mali_osk_wait_queue_init( void ) +{ + _mali_osk_wait_queue_t* ret = NULL; + + ret = kmalloc(sizeof(_mali_osk_wait_queue_t), GFP_KERNEL); + + if (NULL == ret) + { + return ret; + } + + init_waitqueue_head(&ret->wait_queue); + MALI_DEBUG_ASSERT(!waitqueue_active(&ret->wait_queue)); + + return ret; +} + +void _mali_osk_wait_queue_wait_event( _mali_osk_wait_queue_t *queue, mali_bool (*condition)(void) ) +{ + MALI_DEBUG_ASSERT_POINTER( queue ); + MALI_DEBUG_PRINT(6, ("Adding to wait queue %p\n", queue)); + wait_event(queue->wait_queue, condition()); +} + +void _mali_osk_wait_queue_wake_up( _mali_osk_wait_queue_t *queue ) +{ + MALI_DEBUG_ASSERT_POINTER( queue ); + + /* if queue is empty, don't attempt to wake up its elements */ + if (!waitqueue_active(&queue->wait_queue)) return; + + MALI_DEBUG_PRINT(6, ("Waking up elements in wait queue %p ....\n", queue)); + + wake_up_all(&queue->wait_queue); + + MALI_DEBUG_PRINT(6, ("... elements in wait queue %p woken up\n", queue)); +} + +void _mali_osk_wait_queue_term( _mali_osk_wait_queue_t *queue ) +{ + /* Parameter validation */ + MALI_DEBUG_ASSERT_POINTER( queue ); + + /* Linux requires no explicit termination of wait queues */ + kfree(queue); +} |