1 files changed, 112 insertions, 0 deletions
diff --git a/drivers/gpu/pvr/ion.c b/drivers/gpu/pvr/ion.c
new file mode 100644
index 0000000..b00fdb1
--- /dev/null
+++ b/drivers/gpu/pvr/ion.c
@@ -0,0 +1,112 @@
+/**********************************************************************
+ *
+ * Copyright (C) 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 "ion.h"
+
+#include "services.h"
+#include "servicesint.h"
+#include "mutex.h"
+#include "lock.h"
+#include "mm.h"
+#include "handle.h"
+#include "perproc.h"
+#include "env_perproc.h"
+#include "private_data.h"
+#include "pvr_debug.h"
+
+#include <linux/module.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+
+extern struct ion_client *gpsIONClient;
+
+void PVRSRVExportFDToIONHandles(int fd, struct ion_client **client,
+								struct ion_handle *handles[2])
+{
+	PVRSRV_FILE_PRIVATE_DATA *psPrivateData;
+	PVRSRV_KERNEL_MEM_INFO *psKernelMemInfo;
+	LinuxMemArea *psLinuxMemArea;
+	PVRSRV_ERROR eError;
+	struct file *psFile;
+
+	/* Take the bridge mutex so the handle won't be freed underneath us */
+	LinuxLockMutex(&gPVRSRVLock);
+
+	psFile = fget(fd);
+	if(!psFile)
+		goto err_unlock;
+
+	psPrivateData = psFile->private_data;
+	if(!psPrivateData)
+	{
+		PVR_DPF((PVR_DBG_ERROR, "%s: struct file* has no private_data; "
+								"invalid export handle", __func__));
+		goto err_fput;
+	}
+
+	eError = PVRSRVLookupHandle(KERNEL_HANDLE_BASE,
+								(IMG_PVOID *)&psKernelMemInfo,
+								psPrivateData->hKernelMemInfo,
+								PVRSRV_HANDLE_TYPE_MEM_INFO);
+	if(eError != PVRSRV_OK)
+	{
+		PVR_DPF((PVR_DBG_ERROR, "%s: Failed to look up MEM_INFO handle",
+								__func__));
+		goto err_fput;
+	}
+
+	psLinuxMemArea = (LinuxMemArea *)psKernelMemInfo->sMemBlk.hOSMemHandle;
+	BUG_ON(psLinuxMemArea == IMG_NULL);
+
+	if(psLinuxMemArea->eAreaType != LINUX_MEM_AREA_ION)
+	{
+		PVR_DPF((PVR_DBG_ERROR, "%s: Valid handle, but not an ION buffer",
+								__func__));
+		goto err_fput;
+	}
+
+	handles[0] = psLinuxMemArea->uData.sIONTilerAlloc.psIONHandle[0];
+	handles[1] = psLinuxMemArea->uData.sIONTilerAlloc.psIONHandle[1];
+	if(client)
+		*client = gpsIONClient;
+
+err_fput:
+	fput(psFile);
+err_unlock:
+	/* Allow PVRSRV clients to communicate with srvkm again */
+	LinuxUnLockMutex(&gPVRSRVLock);
+}
+
+struct ion_handle *
+PVRSRVExportFDToIONHandle(int fd, struct ion_client **client)
+{
+	struct ion_handle *psHandles[2] = { IMG_NULL, IMG_NULL };
+	PVRSRVExportFDToIONHandles(fd, client, psHandles);
+	return psHandles[0];
+}
+
+EXPORT_SYMBOL(PVRSRVExportFDToIONHandles);
+EXPORT_SYMBOL(PVRSRVExportFDToIONHandle);