You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
126 lines
3.6 KiB
126 lines
3.6 KiB
/*
|
|
* 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 */
|