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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */2/*3 * DMABUF Heaps Userspace API4 *5 * Copyright (C) 2011 Google, Inc.6 * Copyright (C) 2019 Linaro Ltd.7 */8#ifndef _UAPI_LINUX_DMABUF_POOL_H9#define _UAPI_LINUX_DMABUF_POOL_H10 11#include <linux/ioctl.h>12#include <linux/types.h>13 14/**15 * DOC: DMABUF Heaps Userspace API16 */17 18/* Valid FD_FLAGS are O_CLOEXEC, O_RDONLY, O_WRONLY, O_RDWR */19#define DMA_HEAP_VALID_FD_FLAGS (O_CLOEXEC | O_ACCMODE)20 21/* Currently no heap flags */22#define DMA_HEAP_VALID_HEAP_FLAGS (0ULL)23 24/**25 * struct dma_heap_allocation_data - metadata passed from userspace for26 * allocations27 * @len: size of the allocation28 * @fd: will be populated with a fd which provides the29 * handle to the allocated dma-buf30 * @fd_flags: file descriptor flags used when allocating31 * @heap_flags: flags passed to heap32 *33 * Provided by userspace as an argument to the ioctl34 */35struct dma_heap_allocation_data {36 __u64 len;37 __u32 fd;38 __u32 fd_flags;39 __u64 heap_flags;40};41 42#define DMA_HEAP_IOC_MAGIC 'H'43 44/**45 * DOC: DMA_HEAP_IOCTL_ALLOC - allocate memory from pool46 *47 * Takes a dma_heap_allocation_data struct and returns it with the fd field48 * populated with the dmabuf handle of the allocation.49 */50#define DMA_HEAP_IOCTL_ALLOC _IOWR(DMA_HEAP_IOC_MAGIC, 0x0,\51 struct dma_heap_allocation_data)52 53#endif /* _UAPI_LINUX_DMABUF_POOL_H */54