ion: Remove unused file ion-ioctl.c

/*

 *

 * Copyright (C) 2011 Google, Inc.

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and

 * may be copied, distributed, and modified under those terms.

 *

 * This program is distributed in the hope that it will be useful,

 * but 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.

 *

 */

#include <linux/kernel.h>

#include <linux/file.h>

#include <linux/fs.h>

#include <linux/uaccess.h>

#include "ion.h"

#include "ion_priv.h"

#include "compat_ion.h"

union ion_ioctl_arg {

	struct ion_fd_data fd;

	struct ion_allocation_data allocation;

	struct ion_handle_data handle;

	struct ion_custom_data custom;

	struct ion_heap_query query;

};

static int validate_ioctl_arg(unsigned int cmd, union ion_ioctl_arg *arg)

{

	int ret = 0;

	switch (cmd) {

	case ION_IOC_HEAP_QUERY:

		ret = arg->query.reserved0 != 0;

		ret |= arg->query.reserved1 != 0;

		ret |= arg->query.reserved2 != 0;

		break;

	default:

		break;

	}

	return ret ? -EINVAL : 0;

}

/* fix up the cases where the ioctl direction bits are incorrect */

static unsigned int ion_ioctl_dir(unsigned int cmd)

{

	switch (cmd) {

	case ION_IOC_SYNC:

	case ION_IOC_FREE:

	case ION_IOC_CUSTOM:

		return _IOC_WRITE;

	default:

		return _IOC_DIR(cmd);

	}

}

long ion_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)

{

	struct ion_client *client = filp->private_data;

	struct ion_device *dev = client->dev;

	struct ion_handle *cleanup_handle = NULL;

	int ret = 0;

	unsigned int dir;

	union ion_ioctl_arg data;

	dir = ion_ioctl_dir(cmd);

	if (_IOC_SIZE(cmd) > sizeof(data))

		return -EINVAL;

	/*

	 * The copy_from_user is unconditional here for both read and write

	 * to do the validate. If there is no write for the ioctl, the

	 * buffer is cleared

	 */

	if (copy_from_user(&data, (void __user *)arg, _IOC_SIZE(cmd)))

		return -EFAULT;

	ret = validate_ioctl_arg(cmd, &data);

	if (WARN_ON_ONCE(ret))

		return ret;

	if (!(dir & _IOC_WRITE))

		memset(&data, 0, sizeof(data));

	switch (cmd) {

	case ION_IOC_ALLOC:

	{

		struct ion_handle *handle;

		handle = ion_alloc(client, data.allocation.len,

						data.allocation.align,

						data.allocation.heap_id_mask,

						data.allocation.flags);

		if (IS_ERR(handle))

			return PTR_ERR(handle);

		data.allocation.handle = handle->id;

		cleanup_handle = handle;

		break;

	}

	case ION_IOC_FREE:

	{

		struct ion_handle *handle;

		mutex_lock(&client->lock);

		handle = ion_handle_get_by_id_nolock(client, data.handle.handle);

		if (IS_ERR(handle)) {

			mutex_unlock(&client->lock);

			return PTR_ERR(handle);

		}

		ion_free_nolock(client, handle);

		ion_handle_put_nolock(handle);

		mutex_unlock(&client->lock);

		break;

	}

	case ION_IOC_SHARE:

	case ION_IOC_MAP:

	{

		struct ion_handle *handle;

		handle = ion_handle_get_by_id(client, data.handle.handle);

		if (IS_ERR(handle))

			return PTR_ERR(handle);

		data.fd.fd = ion_share_dma_buf_fd(client, handle);

		ion_handle_put(handle);

		if (data.fd.fd < 0)

			ret = data.fd.fd;

		break;

	}

	case ION_IOC_IMPORT:

	{

		struct ion_handle *handle;

		handle = ion_import_dma_buf_fd(client, data.fd.fd);

		if (IS_ERR(handle))

			ret = PTR_ERR(handle);

		else

			data.handle.handle = handle->id;

		break;

	}

	case ION_IOC_SYNC:

	{

		ret = ion_sync_for_device(client, data.fd.fd);

		break;

	}

	case ION_IOC_CUSTOM:

	{

		if (!dev->custom_ioctl)

			return -ENOTTY;

		ret = dev->custom_ioctl(client, data.custom.cmd,

						data.custom.arg);

		break;

	}

	case ION_IOC_HEAP_QUERY:

		ret = ion_query_heaps(client, &data.query);

		break;

	default:

		return -ENOTTY;

	}

	if (dir & _IOC_READ) {

		if (copy_to_user((void __user *)arg, &data, _IOC_SIZE(cmd))) {

			if (cleanup_handle)

				ion_free(client, cleanup_handle);

			return -EFAULT;

		}

	}

	return ret;

}