/*******************************************************************************
@File
@Title          Server bridge for mmextmem
@Copyright      Copyright (c) Imagination Technologies Ltd. All Rights Reserved
@Description    Implements the server side of the bridge for mmextmem
@License        MIT

The contents of this file are subject to the MIT license as set out below.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

This License is also included in this distribution in the file called
"MIT-COPYING".

EXCEPT AS OTHERWISE STATED IN A NEGOTIATED AGREEMENT: (A) THE SOFTWARE IS
PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE AND NONINFRINGEMENT; AND (B) IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
********************************************************************************/

#include <linux/uaccess.h>

#include "img_defs.h"

#include "devicemem_server.h"
#include "pmr.h"
#include "devicemem_heapcfg.h"
#include "physmem.h"
#include "physmem_extmem.h"


#include "common_mmextmem_bridge.h"

#include "allocmem.h"
#include "pvr_debug.h"
#include "connection_server.h"
#include "pvr_bridge.h"
#if defined(SUPPORT_RGX)
#include "rgx_bridge.h"
#endif
#include "srvcore.h"
#include "handle.h"

#include <linux/slab.h>


/* ***************************************************************************
 * Server-side bridge entry points
 */
 
static IMG_INT
PVRSRVBridgePhysmemWrapExtMem(IMG_UINT32 ui32DispatchTableEntry,
					  PVRSRV_BRIDGE_IN_PHYSMEMWRAPEXTMEM *psPhysmemWrapExtMemIN,
					  PVRSRV_BRIDGE_OUT_PHYSMEMWRAPEXTMEM *psPhysmemWrapExtMemOUT,
					 CONNECTION_DATA *psConnection)
{
	PMR * psPMRPtrInt = NULL;


	psPhysmemWrapExtMemOUT->eError =
		PhysmemWrapExtMem(psConnection, OSGetDevData(psConnection),
					psPhysmemWrapExtMemIN->uiSize,
					psPhysmemWrapExtMemIN->ui64CpuVAddr,
					psPhysmemWrapExtMemIN->uiFlags,
					&psPMRPtrInt);
	/* Exit early if bridged call fails */
	if(psPhysmemWrapExtMemOUT->eError != PVRSRV_OK)
	{
		goto PhysmemWrapExtMem_exit;
	}

	/* Lock over handle creation. */
	LockHandle();


	psPhysmemWrapExtMemOUT->eError = PVRSRVAllocHandleUnlocked(psConnection->psHandleBase,

							&psPhysmemWrapExtMemOUT->hPMRPtr,
							(void *) psPMRPtrInt,
							PVRSRV_HANDLE_TYPE_PHYSMEM_PMR,
							PVRSRV_HANDLE_ALLOC_FLAG_MULTI
							,(PFN_HANDLE_RELEASE)&PMRUnrefPMR);
	if (psPhysmemWrapExtMemOUT->eError != PVRSRV_OK)
	{
		UnlockHandle();
		goto PhysmemWrapExtMem_exit;
	}

	/* Release now we have created handles. */
	UnlockHandle();


PhysmemWrapExtMem_exit:


	if (psPhysmemWrapExtMemOUT->eError != PVRSRV_OK)
	{
		if (psPMRPtrInt)
		{
			PMRUnrefPMR(psPMRPtrInt);
		}
	}


	return 0;
}


/* *************************************************************************** 
 * Server bridge dispatch related glue 
 */

static IMG_BOOL bUseLock = IMG_TRUE;

PVRSRV_ERROR InitMMEXTMEMBridge(void);
PVRSRV_ERROR DeinitMMEXTMEMBridge(void);

/*
 * Register all MMEXTMEM functions with services
 */
PVRSRV_ERROR InitMMEXTMEMBridge(void)
{

	SetDispatchTableEntry(PVRSRV_BRIDGE_MMEXTMEM, PVRSRV_BRIDGE_MMEXTMEM_PHYSMEMWRAPEXTMEM, PVRSRVBridgePhysmemWrapExtMem,
					NULL, bUseLock);


	return PVRSRV_OK;
}

/*
 * Unregister all mmextmem functions with services
 */
PVRSRV_ERROR DeinitMMEXTMEMBridge(void)
{

	UnsetDispatchTableEntry(PVRSRV_BRIDGE_MMEXTMEM, PVRSRV_BRIDGE_MMEXTMEM_PHYSMEMWRAPEXTMEM);


	return PVRSRV_OK;
}