/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
/*
|
* DMABUF Heaps Userspace API
|
*
|
* Copyright (C) 2011 Google, Inc.
|
* Copyright (C) 2019 Linaro Ltd.
|
* Copyright (C) 2022 Rockchip Electronics Co. Ltd.
|
* Author: Simon Xue <xxm@rock-chips.com>
|
*/
|
#ifndef _UAPI_LINUX_DMABUF_POOL_H
|
#define _UAPI_LINUX_DMABUF_POOL_H
|
|
#include <linux/ioctl.h>
|
#include <linux/types.h>
|
|
/**
|
* DOC: DMABUF Heaps Userspace API
|
*/
|
|
/* Valid FD_FLAGS are O_CLOEXEC, O_RDONLY, O_WRONLY, O_RDWR */
|
#define RK_DMA_HEAP_VALID_FD_FLAGS (O_CLOEXEC | O_ACCMODE)
|
|
/* Currently no heap flags */
|
#define RK_DMA_HEAP_VALID_HEAP_FLAGS (0)
|
|
/**
|
* struct rk_dma_heap_allocation_data - metadata passed from userspace for
|
* allocations
|
* @len: size of the allocation
|
* @fd: will be populated with a fd which provides the
|
* handle to the allocated dma-buf
|
* @fd_flags: file descriptor flags used when allocating
|
* @heap_flags: flags passed to heap
|
*
|
* Provided by userspace as an argument to the ioctl
|
*/
|
struct rk_dma_heap_allocation_data {
|
__u64 len;
|
__u32 fd;
|
__u32 fd_flags;
|
__u64 heap_flags;
|
};
|
|
#define RK_DMA_HEAP_IOC_MAGIC 'R'
|
|
/**
|
* DOC: RK_DMA_HEAP_IOCTL_ALLOC - allocate memory from pool
|
*
|
* Takes a rk_dma_heap_allocation_data struct and returns it with the fd field
|
* populated with the dmabuf handle of the allocation.
|
*/
|
#define RK_DMA_HEAP_IOCTL_ALLOC _IOWR(RK_DMA_HEAP_IOC_MAGIC, 0x0,\
|
struct rk_dma_heap_allocation_data)
|
|
#endif /* _UAPI_LINUX_DMABUF_POOL_H */
|
