/*************************************************************************/ /*!
@File
@Title          Linux specific per process data functions
@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
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the GNU General Public License Version 2 ("GPL") in which case the provisions
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not delete the provisions above, a recipient may use your version of this file
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"MIT-COPYING".

EXCEPT AS OTHERWISE STATED IN A NEGOTIATED AGREEMENT: (A) THE SOFTWARE IS
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*/ /**************************************************************************/

#include <linux/version.h>

#include "connection_server.h"
#include "osconnection_server.h"

#include "env_connection.h"
#include "allocmem.h"
#include "pvr_debug.h"

#include <linux/sched.h>

#if defined (SUPPORT_ION)
#include <linux/err.h>
#include PVR_ANDROID_ION_HEADER

/*
	The ion device (the base object for all requests)
	gets created by the system and we acquire it via
	linux specific functions provided by the system layer
*/
#include "ion_sys.h"
#endif

PVRSRV_ERROR OSConnectionPrivateDataInit(IMG_HANDLE *phOsPrivateData, void *pvOSData)
{
	ENV_CONNECTION_PRIVATE_DATA *psPrivData = pvOSData;
	ENV_CONNECTION_DATA *psEnvConnection;
#if defined(SUPPORT_ION) && (LINUX_VERSION_CODE < KERNEL_VERSION(4, 12, 0))
	ENV_ION_CONNECTION_DATA *psIonConnection;
#endif

	*phOsPrivateData = OSAllocZMem(sizeof(ENV_CONNECTION_DATA));

	if (*phOsPrivateData == NULL)
	{
		PVR_DPF((PVR_DBG_ERROR, "%s: OSAllocMem failed", __func__));
		return PVRSRV_ERROR_OUT_OF_MEMORY;
	}

	psEnvConnection = (ENV_CONNECTION_DATA *)*phOsPrivateData;

	psEnvConnection->owner = current->tgid;

	/* Save the pointer to our struct file */
	psEnvConnection->psFile = psPrivData->psFile;
	psEnvConnection->psDevNode = psPrivData->psDevNode;

#if defined(SUPPORT_ION) && (LINUX_VERSION_CODE < KERNEL_VERSION(4, 12, 0))
	psIonConnection = (ENV_ION_CONNECTION_DATA *)OSAllocZMem(sizeof(ENV_ION_CONNECTION_DATA));
	if (psIonConnection == NULL)
	{
		PVR_DPF((PVR_DBG_ERROR, "%s: OSAllocMem failed", __func__));
		return PVRSRV_ERROR_OUT_OF_MEMORY;
	}

	psEnvConnection->psIonData = psIonConnection;
	/*
		We can have more then one connection per process so we need more then
		the PID to have a unique name
	*/
	psEnvConnection->psIonData->psIonDev = IonDevAcquire();
	OSSNPrintf(psEnvConnection->psIonData->azIonClientName, ION_CLIENT_NAME_SIZE, "pvr_ion_client-%p-%d", *phOsPrivateData, OSGetCurrentClientProcessIDKM());
	psEnvConnection->psIonData->psIonClient =
		ion_client_create(psEnvConnection->psIonData->psIonDev,
						  psEnvConnection->psIonData->azIonClientName);

	if (IS_ERR_OR_NULL(psEnvConnection->psIonData->psIonClient))
	{
		PVR_DPF((PVR_DBG_ERROR, "OSConnectionPrivateDataInit: Couldn't create "
								"ion client for per connection data"));
		return PVRSRV_ERROR_OUT_OF_MEMORY;
	}
#endif /* SUPPORT_ION && (LINUX_VERSION_CODE < KERNEL_VERSION(4, 12, 0)) */
	return PVRSRV_OK;
}

PVRSRV_ERROR OSConnectionPrivateDataDeInit(IMG_HANDLE hOsPrivateData)
{
	ENV_CONNECTION_DATA *psEnvConnection;

	if (hOsPrivateData == NULL)
	{
		return PVRSRV_OK;
	}

	psEnvConnection = hOsPrivateData;

#if defined(SUPPORT_ION) && (LINUX_VERSION_CODE < KERNEL_VERSION(4, 12, 0))
	PVR_ASSERT(psEnvConnection->psIonData != NULL);

	PVR_ASSERT(psEnvConnection->psIonData->psIonClient != NULL);
	ion_client_destroy(psEnvConnection->psIonData->psIonClient);

	IonDevRelease(psEnvConnection->psIonData->psIonDev);
	OSFreeMem(psEnvConnection->psIonData);
#endif

	OSFreeMem(hOsPrivateData);
	/*not nulling pointer, copy on stack*/

	return PVRSRV_OK;
}


PVRSRV_DEVICE_NODE *OSGetDevData(CONNECTION_DATA *psConnection)
{
	ENV_CONNECTION_DATA *psEnvConnection;

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

	return psEnvConnection->psDevNode;
}