Merge branch 'master' of fossencdi.org:kernel_samsung_smdk4412

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);
+}