drivers/staging/imgtec/rogue/module_common.c - kernel/x86_64 - Git at Google

 /*************************************************************************/ /*!
 @File
 @Title          Common linux module setup
 @Copyright      Copyright (c) Imagination Technologies Ltd. All Rights Reserved
 @License        Dual MIT/GPLv2

 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.

 Alternatively, the contents of this file may be used under the terms of
 the GNU General Public License Version 2 ("GPL") in which case the provisions
 of GPL are applicable instead of those above.

 If you wish to allow use of your version of this file only under the terms of
 GPL, and not to allow others to use your version of this file under the terms
 of the MIT license, indicate your decision by deleting the provisions above
 and replace them with the notice and other provisions required by GPL as set
 out in the file called "GPL-COPYING" included in this distribution. If you do
 not delete the provisions above, a recipient may use your version of this file
 under the terms of either the MIT license or GPL.

 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/version.h>

 #if (!defined(LDM_PLATFORM) && !defined(LDM_PCI)) || \
 	(defined(LDM_PLATFORM) && defined(LDM_PCI))
 	#error "LDM_PLATFORM or LDM_PCI must be defined"
 #endif

 #include <linux/module.h>

 #include "pvr_debugfs.h"
 #include "private_data.h"
 #include "linkage.h"
 #include "lists.h"
 #include "power.h"
 #include "env_connection.h"
 #include "process_stats.h"
 #include "module_common.h"
 #include "pvrsrv.h"
 #include "pvr_hwperf.h"

 #if defined(SUPPORT_DRM)
 #include "pvr_drm.h"
 #endif

 #if defined(SUPPORT_NATIVE_FENCE_SYNC)
 #include "pvr_sync.h"
 #endif

 #if defined(SUPPORT_BUFFER_SYNC)
 #include "pvr_buffer_sync.h"
 #endif

 #if defined(SUPPORT_GPUTRACE_EVENTS)
 #include "pvr_gputrace.h"
 #endif

 #if defined(SUPPORT_KERNEL_SRVINIT)
 #include "srvinit.h"
 #endif

 #if defined(PVRSRV_NEED_PVR_DPF) || defined(DEBUG)
 #include <linux/moduleparam.h>
 #endif /* defined(PVRSRV_NEED_PVR_DPF) || defined(DEBUG) */

 #if defined(PVRSRV_NEED_PVR_DPF)
 extern IMG_UINT32 gPVRDebugLevel;
 module_param(gPVRDebugLevel, uint, 0644);
 MODULE_PARM_DESC(gPVRDebugLevel, "Sets the level of debug output (default 0x7)");
 #endif /* defined(PVRSRV_NEED_PVR_DPF) */

 #if defined(DEBUG)
 extern IMG_UINT32 gPMRAllocFail;
 module_param(gPMRAllocFail, uint, 0644);
 MODULE_PARM_DESC(gPMRAllocFail, "When number of PMR allocs reaches"
         " this value, it will fail (default value is 0 which"
         "means that alloc function will behave normally).");
 #endif /* defined(DEBUG) */

 #if defined(PVRSRV_GPUVIRT_GUESTDRV) && defined(PVRSRV_GPUVIRT_MULTIDRV_MODEL)
 /*
  * Kernel symbol clash if re-exported by guest drivers in multi-driver model
  */
 #else
 /*
  * Export some symbols that may be needed by other drivers
  *
  * When support for GPU virtualization is present and the multi-driver
  * model (multi-drivers in same OS instance) is being used, then only
  * the hyperv driver is a true device drivers (i.e. is registered with
  * the kernel to manage the physical device), the other guest drivers
  * are all modules.
  */
 EXPORT_SYMBOL(PVRSRVCheckStatus);
 EXPORT_SYMBOL(PVRSRVGetErrorStringKM);

 #include "rgxapi_km.h"
 EXPORT_SYMBOL(RGXHWPerfConnect);
 EXPORT_SYMBOL(RGXHWPerfDisconnect);
 EXPORT_SYMBOL(RGXHWPerfControl);
 EXPORT_SYMBOL(RGXHWPerfConfigureAndEnableCounters);
 EXPORT_SYMBOL(RGXHWPerfDisableCounters);
 EXPORT_SYMBOL(RGXHWPerfAcquireData);
 EXPORT_SYMBOL(RGXHWPerfReleaseData);
 #endif

 DEFINE_MUTEX(gPVRSRVLock);

 #if defined(PVRSRV_GPUVIRT_GUESTDRV) && defined(PVRSRV_GPUVIRT_MULTIDRV_MODEL)
 /* Functionality is n/a for guest drivers in multi-driver model */
 #else
 static DEFINE_MUTEX(gsPMMutex);
 static IMG_BOOL bDriverIsSuspended;
 static IMG_BOOL bDriverIsShutdown;

 #if !defined(SUPPORT_DRM_EXT)
 LDM_DEV *gpsPVRLDMDev;
 #endif

 DEFINE_MUTEX(gGlobalLookupPMRLock);

 /*!
 ******************************************************************************

  @Function		PVRSRVDriverShutdown

  @Description

  Suspend device operation for system shutdown.  This is called as part of the
  system halt/reboot process.  The driver is put into a quiescent state by
  setting the power state to D3.

  @input pDevice - the device for which shutdown is requested

  @Return nothing

 *****************************************************************************/
 void PVRSRVDriverShutdown(LDM_DEV *pDevice)
 {
 	PVR_TRACE(("PVRSRVDriverShutdown (pDevice=%p)", pDevice));

 	mutex_lock(&gsPMMutex);

 	if (!bDriverIsShutdown && !bDriverIsSuspended)
 	{
 		/*
 		 * Take the bridge mutex, and never release it, to stop
 		 * processes trying to use the driver after it has been
 		 * shutdown.
 		 */
 		OSAcquireBridgeLock();

 		(void) PVRSRVSetPowerStateKM(PVRSRV_SYS_POWER_STATE_OFF, IMG_TRUE);
 	}

 	bDriverIsShutdown = IMG_TRUE;

 	/* The bridge mutex is held on exit */
 	mutex_unlock(&gsPMMutex);
 }

 /*!
 ******************************************************************************

  @Function		PVRSRVDriverSuspend

  @Description

  Suspend device operation.

  @input pDevice - the device for which resume is requested

  @Return 0 for success or <0 for an error.

 *****************************************************************************/
 int PVRSRVDriverSuspend(struct device *pDevice)
 {
 	int res = 0;

 	PVR_TRACE(( "PVRSRVDriverSuspend (pDevice=%p)", pDevice));

 	mutex_lock(&gsPMMutex);

 	if (!bDriverIsSuspended && !bDriverIsShutdown)
 	{
 		OSAcquireBridgeLock();

 		if (PVRSRVSetPowerStateKM(PVRSRV_SYS_POWER_STATE_OFF, IMG_TRUE) == PVRSRV_OK)
 		{
 			bDriverIsSuspended = IMG_TRUE;
 			OSSetDriverSuspended();
 		}
 		else
 		{
 			res = -EINVAL;
 		}
 		OSReleaseBridgeLock();
 	}

 	mutex_unlock(&gsPMMutex);

 	return res;
 }

 /*!
 ******************************************************************************

  @Function		PVRSRVDriverResume

  @Description

  Resume device operation.

  @input pDevice - the device for which resume is requested

  @Return 0 for success or <0 for an error.

 *****************************************************************************/
 int PVRSRVDriverResume(struct device *pDevice)
 {
 	int res = 0;

 	PVR_TRACE(("PVRSRVDriverResume (pDevice=%p)", pDevice));

 	mutex_lock(&gsPMMutex);

 	if (bDriverIsSuspended && !bDriverIsShutdown)
 	{
 		OSAcquireBridgeLock();

 		if (PVRSRVSetPowerStateKM(PVRSRV_SYS_POWER_STATE_ON, IMG_TRUE) == PVRSRV_OK)
 		{
 			bDriverIsSuspended = IMG_FALSE;
 			OSClearDriverSuspended();
 		}
 		else
 		{
 			res = -EINVAL;
 		}
 		OSReleaseBridgeLock();
 	}

 	mutex_unlock(&gsPMMutex);

 	return res;
 }
 #endif /* defined(PVRSRV_GPUVIRT_GUESTDRV) && defined(PVRSRV_GPUVIRT_MULTIDRV_MODEL) */

 #if defined(SUPPORT_DRM)
 #define PRIVATE_DATA(pFile) (PVR_DRM_FILE_FROM_FILE(pFile)->driver_priv)
 #else
 #define PRIVATE_DATA(pFile) ((pFile)->private_data)
 #endif

 static void *PVRSRVFindRGXDevNode(PVRSRV_DEVICE_NODE *psDevNode)
 {
 	if (psDevNode->sDevId.eDeviceType == PVRSRV_DEVICE_TYPE_RGX)
 	{
 		return psDevNode;
 	}

 	return NULL;
 }

 /*!
 ******************************************************************************

  @Function		PVRSRVCommonOpen

  @Description

  Open the PVR services node.

  @input pFile - the file handle data for the actual file being opened

  @Return 0 for success or <0 for an error.

 *****************************************************************************/
 int PVRSRVCommonOpen(struct file *pFile)
 {
 	PVRSRV_DATA *psPVRSRVData = PVRSRVGetPVRSRVData();
 	ENV_CONNECTION_PRIVATE_DATA sPrivData;
 	void *pvConnectionData;
 	PVRSRV_ERROR eError;
 	int iErr;

 	OSAcquireBridgeLock();

 	if (!psPVRSRVData)
 	{
 		PVR_DPF((PVR_DBG_ERROR, "%s: No device data", __func__));
 		iErr = -ENODEV;
 		goto ErrorUnlock;
 	}

 #if defined(SUPPORT_KERNEL_SRVINIT)
 	eError = SrvInit();
 	if (eError != PVRSRV_OK)
 	{
 		PVR_DPF((PVR_DBG_ERROR, "%s: SrvInit failed (%d)", __func__, eError));
 		iErr = -ENODEV;
 		goto ErrorUnlock;
 	}
 #endif

 	sPrivData.psDevNode = List_PVRSRV_DEVICE_NODE_Any(psPVRSRVData->psDeviceNodeList,
 							  PVRSRVFindRGXDevNode);
 	if (!sPrivData.psDevNode)
 	{
 		PVR_DPF((PVR_DBG_ERROR, "%s: Failed to get device node", __func__));
 		iErr = -ENODEV;
 		goto ErrorUnlock;
 	}

 	sPrivData.psFile = pFile;

 	/*
 	 * Here we pass the file pointer which will passed through to our
 	 * OSConnectionPrivateDataInit function where we can save it so
 	 * we can back reference the file structure from it's connection
 	 */
 	eError = PVRSRVConnectionConnect(&pvConnectionData, (void *) &sPrivData);
 	if (eError != PVRSRV_OK)
 	{
 		iErr = -ENOMEM;
 		goto ErrorUnlock;
 	}

 	PRIVATE_DATA(pFile) = pvConnectionData;
 	OSReleaseBridgeLock();

 	return 0;

 ErrorUnlock:
 	OSReleaseBridgeLock();
 	return iErr;
 }

 /*!
 ******************************************************************************

  @Function		PVRSRVCommonRelease

  @Description

  Release access the PVR services node - called when a file is closed, whether
  at exit or using close(2) system call.

  @input pFile - the file handle data for the actual file being released

  @Return 0 for success or <0 for an error.

 *****************************************************************************/
 void PVRSRVCommonRelease(struct file *pFile)
 {
 	void *pvConnectionData;

 	OSAcquireBridgeLock();

 	pvConnectionData = PRIVATE_DATA(pFile);
 	if (pvConnectionData)
 	{
 		PVRSRVConnectionDisconnect(pvConnectionData);
 		PRIVATE_DATA(pFile) = NULL;
 	}

 	OSReleaseBridgeLock();
 }


 CONNECTION_DATA *LinuxConnectionFromFile(struct file *pFile)
 {
 	return (pFile)? PRIVATE_DATA(pFile): NULL;
 }

 struct file *LinuxFileFromConnection(CONNECTION_DATA *psConnection)
 {
 	ENV_CONNECTION_DATA *psEnvConnection;

 	psEnvConnection = PVRSRVConnectionPrivateData(psConnection);
 	PVR_ASSERT(psEnvConnection != NULL);

 	return psEnvConnection->psFile;
 }

 /*!
 *****************************************************************************

  @Function		PVRSRVDriverInit

  @Description	Do the driver-specific initialisation (as opposed to
               the device-specific initialisation.)

 *****************************************************************************/
 int PVRSRVDriverInit(void)
 {
 	int error = 0;

 	error = PVRDebugFSInit();
 	if (error != 0)
 	{
 		return error;
 	}

 #if defined(PVRSRV_ENABLE_PROCESS_STATS)
 	if (PVRSRVStatsInitialise() != PVRSRV_OK)
 	{
 		return -ENOMEM;
 	}
 #endif

 	if (PVROSFuncInit() != PVRSRV_OK)
 	{
 		return -ENOMEM;
 	}

 	LinuxBridgeInit();

 	return 0;
 }

 /*!
 *****************************************************************************

  @Function		PVRSRVDriverDeinit

  @Description	Unwind PVRSRVDriverInit

 *****************************************************************************/
 void PVRSRVDriverDeinit(void)
 {
 	LinuxBridgeDeInit();

 	PVROSFuncDeInit();

 #if defined(PVRSRV_ENABLE_PROCESS_STATS)
 	PVRSRVStatsDestroy();
 #endif
 	PVRDebugFSDeInit();
 }

 /*!
 *****************************************************************************

  @Function		PVRSRVDeviceInit

  @Description	Do the initialisation we have to do after registering the device

 *****************************************************************************/
 int PVRSRVDeviceInit(void)
 {
 	int error = 0;

 #if defined(SUPPORT_NATIVE_FENCE_SYNC)
 	{
 		PVRSRV_ERROR eError = pvr_sync_init();
 		if (eError != PVRSRV_OK)
 		{
 			PVR_DPF((PVR_DBG_ERROR, "PVRCore_Init: unable to create sync (%d)", eError));
 			return -EBUSY;
 		}
 	}
 #endif

 #if defined(SUPPORT_BUFFER_SYNC)
 	error = pvr_buffer_sync_init();
 	if (error != 0)
 	{
 		PVR_DPF((PVR_DBG_ERROR,
 			 "%s: unable to initialise buffer_sync support (%d)",
 			 __func__, error));
 		return error;
 	}
 #endif

 	error = PVRDebugCreateDebugFSEntries();
 	if (error != 0)
 	{
 		PVR_DPF((PVR_DBG_WARNING, "PVRCore_Init: failed to create default debugfs entries (%d)", error));
 	}

 	error = PVRSRVHWperfCreateDebugFs();
 	if (error != 0)
 	{
 		PVR_DPF((PVR_DBG_WARNING, "PVRCore_Init: failed to initialise HWPerf debugfs (%d)", error));
 	}

 	return 0;
 }

 /*!
 *****************************************************************************

  @Function		PVRSRVDeviceDeinit

  @Description	Unwind PVRSRVDeviceInit

 *****************************************************************************/
 void PVRSRVDeviceDeinit(void)
 {
 	PVRSRVHWperfDestroyDebugFs();

 #if defined(SUPPORT_GPUTRACE_EVENTS)
 	PVRGpuTraceDeInit();
 #endif

 	PVRDebugRemoveDebugFSEntries();

 #if defined(SUPPORT_BUFFER_SYNC)
 	pvr_buffer_sync_deinit();
 #endif

 #if defined(SUPPORT_NATIVE_FENCE_SYNC)
 	pvr_sync_deinit();
 #endif
 }
	/************************************************************************/ /!
	@File
	@Title Common linux module setup
	@Copyright Copyright (c) Imagination Technologies Ltd. All Rights Reserved
	@License Dual MIT/GPLv2

	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.

	Alternatively, the contents of this file may be used under the terms of
	the GNU General Public License Version 2 ("GPL") in which case the provisions
	of GPL are applicable instead of those above.

	If you wish to allow use of your version of this file only under the terms of
	GPL, and not to allow others to use your version of this file under the terms
	of the MIT license, indicate your decision by deleting the provisions above
	and replace them with the notice and other provisions required by GPL as set
	out in the file called "GPL-COPYING" included in this distribution. If you do
	not delete the provisions above, a recipient may use your version of this file
	under the terms of either the MIT license or GPL.

	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/version.h>

	#if (!defined(LDM_PLATFORM) && !defined(LDM_PCI)) \|\| \
	(defined(LDM_PLATFORM) && defined(LDM_PCI))
	#error "LDM_PLATFORM or LDM_PCI must be defined"
	#endif

	#include <linux/module.h>

	#include "pvr_debugfs.h"
	#include "private_data.h"
	#include "linkage.h"
	#include "lists.h"
	#include "power.h"
	#include "env_connection.h"
	#include "process_stats.h"
	#include "module_common.h"
	#include "pvrsrv.h"
	#include "pvr_hwperf.h"

	#if defined(SUPPORT_DRM)
	#include "pvr_drm.h"
	#endif

	#if defined(SUPPORT_NATIVE_FENCE_SYNC)
	#include "pvr_sync.h"
	#endif

	#if defined(SUPPORT_BUFFER_SYNC)
	#include "pvr_buffer_sync.h"
	#endif

	#if defined(SUPPORT_GPUTRACE_EVENTS)
	#include "pvr_gputrace.h"
	#endif

	#if defined(SUPPORT_KERNEL_SRVINIT)
	#include "srvinit.h"
	#endif

	#if defined(PVRSRV_NEED_PVR_DPF) \|\| defined(DEBUG)
	#include <linux/moduleparam.h>
	#endif /* defined(PVRSRV_NEED_PVR_DPF) \|\| defined(DEBUG) */

	#if defined(PVRSRV_NEED_PVR_DPF)
	extern IMG_UINT32 gPVRDebugLevel;
	module_param(gPVRDebugLevel, uint, 0644);
	MODULE_PARM_DESC(gPVRDebugLevel, "Sets the level of debug output (default 0x7)");
	#endif /* defined(PVRSRV_NEED_PVR_DPF) */

	#if defined(DEBUG)
	extern IMG_UINT32 gPMRAllocFail;
	module_param(gPMRAllocFail, uint, 0644);
	MODULE_PARM_DESC(gPMRAllocFail, "When number of PMR allocs reaches"
	" this value, it will fail (default value is 0 which"
	"means that alloc function will behave normally).");
	#endif /* defined(DEBUG) */

	#if defined(PVRSRV_GPUVIRT_GUESTDRV) && defined(PVRSRV_GPUVIRT_MULTIDRV_MODEL)
	/*
	* Kernel symbol clash if re-exported by guest drivers in multi-driver model
	*/
	#else
	/*
	* Export some symbols that may be needed by other drivers
	*
	* When support for GPU virtualization is present and the multi-driver
	* model (multi-drivers in same OS instance) is being used, then only
	* the hyperv driver is a true device drivers (i.e. is registered with
	* the kernel to manage the physical device), the other guest drivers
	* are all modules.
	*/
	EXPORT_SYMBOL(PVRSRVCheckStatus);
	EXPORT_SYMBOL(PVRSRVGetErrorStringKM);

	#include "rgxapi_km.h"
	EXPORT_SYMBOL(RGXHWPerfConnect);
	EXPORT_SYMBOL(RGXHWPerfDisconnect);
	EXPORT_SYMBOL(RGXHWPerfControl);
	EXPORT_SYMBOL(RGXHWPerfConfigureAndEnableCounters);
	EXPORT_SYMBOL(RGXHWPerfDisableCounters);
	EXPORT_SYMBOL(RGXHWPerfAcquireData);
	EXPORT_SYMBOL(RGXHWPerfReleaseData);
	#endif

	DEFINE_MUTEX(gPVRSRVLock);

	#if defined(PVRSRV_GPUVIRT_GUESTDRV) && defined(PVRSRV_GPUVIRT_MULTIDRV_MODEL)
	/* Functionality is n/a for guest drivers in multi-driver model */
	#else
	static DEFINE_MUTEX(gsPMMutex);
	static IMG_BOOL bDriverIsSuspended;
	static IMG_BOOL bDriverIsShutdown;

	#if !defined(SUPPORT_DRM_EXT)
	LDM_DEV *gpsPVRLDMDev;
	#endif

	DEFINE_MUTEX(gGlobalLookupPMRLock);

	/*!
	******************************************************************************

	@Function PVRSRVDriverShutdown

	@Description

	Suspend device operation for system shutdown. This is called as part of the
	system halt/reboot process. The driver is put into a quiescent state by
	setting the power state to D3.

	@input pDevice - the device for which shutdown is requested

	@Return nothing

	*****************************************************************************/
	void PVRSRVDriverShutdown(LDM_DEV *pDevice)
	{
	PVR_TRACE(("PVRSRVDriverShutdown (pDevice=%p)", pDevice));

	mutex_lock(&gsPMMutex);

	if (!bDriverIsShutdown && !bDriverIsSuspended)
	{
	/*
	* Take the bridge mutex, and never release it, to stop
	* processes trying to use the driver after it has been
	* shutdown.
	*/
	OSAcquireBridgeLock();

	(void) PVRSRVSetPowerStateKM(PVRSRV_SYS_POWER_STATE_OFF, IMG_TRUE);
	}

	bDriverIsShutdown = IMG_TRUE;

	/* The bridge mutex is held on exit */
	mutex_unlock(&gsPMMutex);
	}

	/*!
	******************************************************************************

	@Function PVRSRVDriverSuspend

	@Description

	Suspend device operation.

	@input pDevice - the device for which resume is requested

	@Return 0 for success or <0 for an error.

	*****************************************************************************/
	int PVRSRVDriverSuspend(struct device *pDevice)
	{
	int res = 0;

	PVR_TRACE(( "PVRSRVDriverSuspend (pDevice=%p)", pDevice));

	mutex_lock(&gsPMMutex);

	if (!bDriverIsSuspended && !bDriverIsShutdown)
	{
	OSAcquireBridgeLock();

	if (PVRSRVSetPowerStateKM(PVRSRV_SYS_POWER_STATE_OFF, IMG_TRUE) == PVRSRV_OK)
	{
	bDriverIsSuspended = IMG_TRUE;
	OSSetDriverSuspended();
	}
	else
	{
	res = -EINVAL;
	}
	OSReleaseBridgeLock();
	}

	mutex_unlock(&gsPMMutex);

	return res;
	}

	/*!
	******************************************************************************

	@Function PVRSRVDriverResume

	@Description

	Resume device operation.

	@input pDevice - the device for which resume is requested

	@Return 0 for success or <0 for an error.

	*****************************************************************************/
	int PVRSRVDriverResume(struct device *pDevice)
	{
	int res = 0;

	PVR_TRACE(("PVRSRVDriverResume (pDevice=%p)", pDevice));

	mutex_lock(&gsPMMutex);

	if (bDriverIsSuspended && !bDriverIsShutdown)
	{
	OSAcquireBridgeLock();

	if (PVRSRVSetPowerStateKM(PVRSRV_SYS_POWER_STATE_ON, IMG_TRUE) == PVRSRV_OK)
	{
	bDriverIsSuspended = IMG_FALSE;
	OSClearDriverSuspended();
	}
	else
	{
	res = -EINVAL;
	}
	OSReleaseBridgeLock();
	}

	mutex_unlock(&gsPMMutex);

	return res;
	}
	#endif /* defined(PVRSRV_GPUVIRT_GUESTDRV) && defined(PVRSRV_GPUVIRT_MULTIDRV_MODEL) */

	#if defined(SUPPORT_DRM)
	#define PRIVATE_DATA(pFile) (PVR_DRM_FILE_FROM_FILE(pFile)->driver_priv)
	#else
	#define PRIVATE_DATA(pFile) ((pFile)->private_data)
	#endif

	static void PVRSRVFindRGXDevNode(PVRSRV_DEVICE_NODE psDevNode)
	{
	if (psDevNode->sDevId.eDeviceType == PVRSRV_DEVICE_TYPE_RGX)
	{
	return psDevNode;
	}

	return NULL;
	}

	/*!
	******************************************************************************

	@Function PVRSRVCommonOpen

	@Description

	Open the PVR services node.

	@input pFile - the file handle data for the actual file being opened

	@Return 0 for success or <0 for an error.

	*****************************************************************************/
	int PVRSRVCommonOpen(struct file *pFile)
	{
	PVRSRV_DATA *psPVRSRVData = PVRSRVGetPVRSRVData();
	ENV_CONNECTION_PRIVATE_DATA sPrivData;
	void *pvConnectionData;
	PVRSRV_ERROR eError;
	int iErr;

	OSAcquireBridgeLock();

	if (!psPVRSRVData)
	{
	PVR_DPF((PVR_DBG_ERROR, "%s: No device data", __func__));
	iErr = -ENODEV;
	goto ErrorUnlock;
	}

	#if defined(SUPPORT_KERNEL_SRVINIT)
	eError = SrvInit();
	if (eError != PVRSRV_OK)
	{
	PVR_DPF((PVR_DBG_ERROR, "%s: SrvInit failed (%d)", __func__, eError));
	iErr = -ENODEV;
	goto ErrorUnlock;
	}
	#endif

	sPrivData.psDevNode = List_PVRSRV_DEVICE_NODE_Any(psPVRSRVData->psDeviceNodeList,
	PVRSRVFindRGXDevNode);
	if (!sPrivData.psDevNode)
	{
	PVR_DPF((PVR_DBG_ERROR, "%s: Failed to get device node", __func__));
	iErr = -ENODEV;
	goto ErrorUnlock;
	}

	sPrivData.psFile = pFile;

	/*
	* Here we pass the file pointer which will passed through to our
	* OSConnectionPrivateDataInit function where we can save it so
	* we can back reference the file structure from it's connection
	*/
	eError = PVRSRVConnectionConnect(&pvConnectionData, (void *) &sPrivData);
	if (eError != PVRSRV_OK)
	{
	iErr = -ENOMEM;
	goto ErrorUnlock;
	}

	PRIVATE_DATA(pFile) = pvConnectionData;
	OSReleaseBridgeLock();

	return 0;

	ErrorUnlock:
	OSReleaseBridgeLock();
	return iErr;
	}

	/*!
	******************************************************************************

	@Function PVRSRVCommonRelease

	@Description

	Release access the PVR services node - called when a file is closed, whether
	at exit or using close(2) system call.

	@input pFile - the file handle data for the actual file being released

	@Return 0 for success or <0 for an error.

	*****************************************************************************/
	void PVRSRVCommonRelease(struct file *pFile)
	{
	void *pvConnectionData;

	OSAcquireBridgeLock();

	pvConnectionData = PRIVATE_DATA(pFile);
	if (pvConnectionData)
	{
	PVRSRVConnectionDisconnect(pvConnectionData);
	PRIVATE_DATA(pFile) = NULL;
	}

	OSReleaseBridgeLock();
	}


	CONNECTION_DATA LinuxConnectionFromFile(struct file pFile)
	{
	return (pFile)? PRIVATE_DATA(pFile): NULL;
	}

	struct file LinuxFileFromConnection(CONNECTION_DATA psConnection)
	{
	ENV_CONNECTION_DATA *psEnvConnection;

	psEnvConnection = PVRSRVConnectionPrivateData(psConnection);
	PVR_ASSERT(psEnvConnection != NULL);

	return psEnvConnection->psFile;
	}

	/*!
	*****************************************************************************

	@Function PVRSRVDriverInit

	@Description Do the driver-specific initialisation (as opposed to
	the device-specific initialisation.)

	*****************************************************************************/
	int PVRSRVDriverInit(void)
	{
	int error = 0;

	error = PVRDebugFSInit();
	if (error != 0)
	{
	return error;
	}

	#if defined(PVRSRV_ENABLE_PROCESS_STATS)
	if (PVRSRVStatsInitialise() != PVRSRV_OK)
	{
	return -ENOMEM;
	}
	#endif

	if (PVROSFuncInit() != PVRSRV_OK)
	{
	return -ENOMEM;
	}

	LinuxBridgeInit();

	return 0;
	}

	/*!
	*****************************************************************************

	@Function PVRSRVDriverDeinit

	@Description Unwind PVRSRVDriverInit

	*****************************************************************************/
	void PVRSRVDriverDeinit(void)
	{
	LinuxBridgeDeInit();

	PVROSFuncDeInit();

	#if defined(PVRSRV_ENABLE_PROCESS_STATS)
	PVRSRVStatsDestroy();
	#endif
	PVRDebugFSDeInit();
	}

	/*!
	*****************************************************************************

	@Function PVRSRVDeviceInit

	@Description Do the initialisation we have to do after registering the device

	*****************************************************************************/
	int PVRSRVDeviceInit(void)
	{
	int error = 0;

	#if defined(SUPPORT_NATIVE_FENCE_SYNC)
	{
	PVRSRV_ERROR eError = pvr_sync_init();
	if (eError != PVRSRV_OK)
	{
	PVR_DPF((PVR_DBG_ERROR, "PVRCore_Init: unable to create sync (%d)", eError));
	return -EBUSY;
	}
	}
	#endif

	#if defined(SUPPORT_BUFFER_SYNC)
	error = pvr_buffer_sync_init();
	if (error != 0)
	{
	PVR_DPF((PVR_DBG_ERROR,
	"%s: unable to initialise buffer_sync support (%d)",
	__func__, error));
	return error;
	}
	#endif

	error = PVRDebugCreateDebugFSEntries();
	if (error != 0)
	{
	PVR_DPF((PVR_DBG_WARNING, "PVRCore_Init: failed to create default debugfs entries (%d)", error));
	}

	error = PVRSRVHWperfCreateDebugFs();
	if (error != 0)
	{
	PVR_DPF((PVR_DBG_WARNING, "PVRCore_Init: failed to initialise HWPerf debugfs (%d)", error));
	}

	return 0;
	}

	/*!
	*****************************************************************************

	@Function PVRSRVDeviceDeinit

	@Description Unwind PVRSRVDeviceInit

	*****************************************************************************/
	void PVRSRVDeviceDeinit(void)
	{
	PVRSRVHWperfDestroyDebugFs();

	#if defined(SUPPORT_GPUTRACE_EVENTS)
	PVRGpuTraceDeInit();
	#endif

	PVRDebugRemoveDebugFSEntries();

	#if defined(SUPPORT_BUFFER_SYNC)
	pvr_buffer_sync_deinit();
	#endif

	#if defined(SUPPORT_NATIVE_FENCE_SYNC)
	pvr_sync_deinit();
	#endif
	}