libion: add 4.12+ kernel headers for forward compatibility

/*

 * Adapted from drivers/staging/android/uapi/ion.h

 *

 * 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.

 *

 */

#ifndef _UAPI_LINUX_ION_NEW_H

#define _UAPI_LINUX_ION_NEW_H

#include <linux/ioctl.h>

#include <linux/types.h>

#define ION_NUM_HEAP_IDS (sizeof(unsigned int) * 8)

/**

 * DOC: Ion Userspace API

 *

 * create a client by opening /dev/ion

 * most operations handled via following ioctls

 *

 */

/**

 * struct ion_new_allocation_data - metadata passed from userspace for allocations

 * @len:		size of the allocation

 * @heap_id_mask:	mask of heap ids to allocate from

 * @flags:		flags passed to heap

 * @handle:		pointer that will be populated with a cookie to use to

 *			refer to this allocation

 *

 * Provided by userspace as an argument to the ioctl - added _new to denote

 * this belongs to the new ION interface.

 */

struct ion_new_allocation_data {

    __u64 len;

    __u32 heap_id_mask;

    __u32 flags;

    __u32 fd;

    __u32 unused;

};

#define MAX_HEAP_NAME 32

/**

 * struct ion_heap_data - data about a heap

 * @name - first 32 characters of the heap name

 * @type - heap type

 * @heap_id - heap id for the heap

 */

struct ion_heap_data {

    char name[MAX_HEAP_NAME];

    __u32 type;

    __u32 heap_id;

    __u32 reserved0;

    __u32 reserved1;

    __u32 reserved2;

};

/**

 * struct ion_heap_query - collection of data about all heaps

 * @cnt - total number of heaps to be copied

 * @heaps - buffer to copy heap data

 */

struct ion_heap_query {

    __u32 cnt;       /* Total number of heaps to be copied */

    __u32 reserved0; /* align to 64bits */

    __u64 heaps;     /* buffer to be populated */

    __u32 reserved1;

    __u32 reserved2;

};

#define ION_IOC_MAGIC 'I'

/**

 * DOC: ION_IOC_NEW_ALLOC - allocate memory

 *

 * Takes an ion_allocation_data struct and returns it with the handle field

 * populated with the opaque handle for the allocation.

 * TODO: This IOCTL will clash by design; however, only one of

 *  ION_IOC_ALLOC or ION_IOC_NEW_ALLOC paths will be exercised,

 *  so this should not conflict.

 */

#define ION_IOC_NEW_ALLOC _IOWR(ION_IOC_MAGIC, 0, struct ion_new_allocation_data)

/**

 * DOC: ION_IOC_FREE - free memory

 *

 * Takes an ion_handle_data struct and frees the handle.

 *

 * #define ION_IOC_FREE		_IOWR(ION_IOC_MAGIC, 1, struct ion_handle_data)

 * This will come from the older kernels, so don't redefine here

 */

/**

 * DOC: ION_IOC_SHARE - creates a file descriptor to use to share an allocation

 *

 * Takes an ion_fd_data struct with the handle field populated with a valid

 * opaque handle.  Returns the struct with the fd field set to a file

 * descriptor open in the current address space.  This file descriptor

 * can then be passed to another process.  The corresponding opaque handle can

 * be retrieved via ION_IOC_IMPORT.

 *

 * #define ION_IOC_SHARE		_IOWR(ION_IOC_MAGIC, 4, struct ion_fd_data)

 * This will come from the older kernels, so don't redefine here

 */

/**

 * DOC: ION_IOC_HEAP_QUERY - information about available heaps

 *

 * Takes an ion_heap_query structure and populates information about

 * available Ion heaps.

 */

#define ION_IOC_HEAP_QUERY _IOWR(ION_IOC_MAGIC, 8, struct ion_heap_query)

#endif /* _UAPI_LINUX_ION_NEW_H */