1 files changed, 136 insertions, 0 deletions

diff --git a/drivers/gpu/pvr/mutex.c b/drivers/gpu/pvr/mutex.c
new file mode 100644
index 00000000000..09963ad9f00
--- /dev/null
+++ b/drivers/gpu/pvr/mutex.c
@@ -0,0 +1,136 @@
+/**********************************************************************
+ *
+ * Copyright(c) 2008 Imagination Technologies Ltd. All rights reserved.
+ * 
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ * 
+ * This program is distributed in the hope it will be useful but, except 
+ * as otherwise stated in writing, without any warranty; without even the 
+ * implied warranty of merchantability or fitness for a particular purpose. 
+ * See the GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ * 
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ * Contact Information:
+ * Imagination Technologies Ltd. <gpl-support@imgtec.com>
+ * Home Park Estate, Kings Langley, Herts, WD4 8LZ, UK 
+ *
+ ******************************************************************************/
+
+#include <linux/version.h>
+#include <linux/errno.h>
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15))
+#include <linux/mutex.h>
+#else
+#include <asm/semaphore.h>
+#endif
+#include <linux/module.h>
+
+#include <img_defs.h>
+#include <services.h>
+
+#include "mutex.h"
+
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15))
+
+IMG_VOID LinuxInitMutex(PVRSRV_LINUX_MUTEX *psPVRSRVMutex)
+{
+    mutex_init(psPVRSRVMutex);
+}
+
+IMG_VOID LinuxLockMutex(PVRSRV_LINUX_MUTEX *psPVRSRVMutex)
+{
+    mutex_lock(psPVRSRVMutex);
+}
+
+PVRSRV_ERROR LinuxLockMutexInterruptible(PVRSRV_LINUX_MUTEX *psPVRSRVMutex)
+{
+    if(mutex_lock_interruptible(psPVRSRVMutex) == -EINTR)
+    {
+        return PVRSRV_ERROR_MUTEX_INTERRUPTIBLE_ERROR;
+    }
+    else
+    {
+        return PVRSRV_OK;
+    }
+}
+
+IMG_INT32 LinuxTryLockMutex(PVRSRV_LINUX_MUTEX *psPVRSRVMutex)
+{
+    return mutex_trylock(psPVRSRVMutex);
+}
+
+IMG_VOID LinuxUnLockMutex(PVRSRV_LINUX_MUTEX *psPVRSRVMutex)
+{
+    mutex_unlock(psPVRSRVMutex);
+}
+
+IMG_BOOL LinuxIsLockedMutex(PVRSRV_LINUX_MUTEX *psPVRSRVMutex)
+{
+    return (mutex_is_locked(psPVRSRVMutex)) ? IMG_TRUE : IMG_FALSE;
+}
+
+
+#else 
+
+
+IMG_VOID LinuxInitMutex(PVRSRV_LINUX_MUTEX *psPVRSRVMutex)
+{
+    init_MUTEX(&psPVRSRVMutex->sSemaphore);
+    atomic_set(&psPVRSRVMutex->Count, 0);
+}
+
+IMG_VOID LinuxLockMutex(PVRSRV_LINUX_MUTEX *psPVRSRVMutex)
+{
+    down(&psPVRSRVMutex->sSemaphore);
+    atomic_dec(&psPVRSRVMutex->Count);
+}
+
+PVRSRV_ERROR LinuxLockMutexInterruptible(PVRSRV_LINUX_MUTEX *psPVRSRVMutex)
+{
+    if(down_interruptible(&psPVRSRVMutex->sSemaphore) == -EINTR)
+    {
+        
+        return PVRSRV_ERROR_MUTEX_INTERRUPTIBLE_ERROR;
+    }else{
+        atomic_dec(&psPVRSRVMutex->Count);
+        return PVRSRV_OK;
+    }
+}
+
+IMG_INT32 LinuxTryLockMutex(PVRSRV_LINUX_MUTEX *psPVRSRVMutex)
+{
+    IMG_INT32 Status = down_trylock(&psPVRSRVMutex->sSemaphore);
+    if(Status == 0)
+    {
+        atomic_dec(&psPVRSRVMutex->Count);
+    }
+
+    return Status;
+}
+
+IMG_VOID LinuxUnLockMutex(PVRSRV_LINUX_MUTEX *psPVRSRVMutex)
+{
+    atomic_inc(&psPVRSRVMutex->Count);
+    up(&psPVRSRVMutex->sSemaphore);
+}
+
+IMG_BOOL LinuxIsLockedMutex(PVRSRV_LINUX_MUTEX *psPVRSRVMutex)
+{
+    IMG_INT32 iCount;
+    
+    iCount = atomic_read(&psPVRSRVMutex->Count);
+
+    return (IMG_BOOL)iCount;
+}
+
+#endif 
+