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dma-heap.h
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * DMABUF Heaps Userspace API * * Copyright (C) 2011 Google, Inc. * Copyright (C) 2019 Linaro Ltd. */ #ifndef _LINUX_DMABUF_POOL_H #define _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 DMA_HEAP_VALID_FD_FLAGS (O_CLOEXEC | O_ACCMODE) /* Currently no heap flags */ #define DMA_HEAP_VALID_HEAP_FLAGS (0) /** * struct 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 dma_heap_allocation_data { __u64 len; __u32 fd; __u32 fd_flags; __u64 heap_flags; }; #define DMA_HEAP_IOC_MAGIC 'H' /** * DOC: DMA_HEAP_IOCTL_ALLOC - allocate memory from pool * * Takes a dma_heap_allocation_data struct and returns it with the fd field * populated with the dmabuf handle of the allocation. */ #define DMA_HEAP_IOCTL_ALLOC _IOWR(DMA_HEAP_IOC_MAGIC, 0x0,\ struct dma_heap_allocation_data) #endif /* _LINUX_DMABUF_POOL_H */