1c02a81fbSAndrew F. Davis /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2c02a81fbSAndrew F. Davis /* 3c02a81fbSAndrew F. Davis * DMABUF Heaps Userspace API 4c02a81fbSAndrew F. Davis * 5c02a81fbSAndrew F. Davis * Copyright (C) 2011 Google, Inc. 6c02a81fbSAndrew F. Davis * Copyright (C) 2019 Linaro Ltd. 7c02a81fbSAndrew F. Davis */ 8c02a81fbSAndrew F. Davis #ifndef _UAPI_LINUX_DMABUF_POOL_H 9c02a81fbSAndrew F. Davis #define _UAPI_LINUX_DMABUF_POOL_H 10c02a81fbSAndrew F. Davis 11c02a81fbSAndrew F. Davis #include <linux/ioctl.h> 12c02a81fbSAndrew F. Davis #include <linux/types.h> 13c02a81fbSAndrew F. Davis 14c02a81fbSAndrew F. Davis /** 15c02a81fbSAndrew F. Davis * DOC: DMABUF Heaps Userspace API 16c02a81fbSAndrew F. Davis */ 17c02a81fbSAndrew F. Davis 18c02a81fbSAndrew F. Davis /* Valid FD_FLAGS are O_CLOEXEC, O_RDONLY, O_WRONLY, O_RDWR */ 19c02a81fbSAndrew F. Davis #define DMA_HEAP_VALID_FD_FLAGS (O_CLOEXEC | O_ACCMODE) 20c02a81fbSAndrew F. Davis 21c02a81fbSAndrew F. Davis /* Currently no heap flags */ 22c02a81fbSAndrew F. Davis #define DMA_HEAP_VALID_HEAP_FLAGS (0) 23c02a81fbSAndrew F. Davis 24c02a81fbSAndrew F. Davis /** 25c02a81fbSAndrew F. Davis * struct dma_heap_allocation_data - metadata passed from userspace for 26c02a81fbSAndrew F. Davis * allocations 27c02a81fbSAndrew F. Davis * @len: size of the allocation 28c02a81fbSAndrew F. Davis * @fd: will be populated with a fd which provides the 29c02a81fbSAndrew F. Davis * handle to the allocated dma-buf 30c02a81fbSAndrew F. Davis * @fd_flags: file descriptor flags used when allocating 31c02a81fbSAndrew F. Davis * @heap_flags: flags passed to heap 32c02a81fbSAndrew F. Davis * 33c02a81fbSAndrew F. Davis * Provided by userspace as an argument to the ioctl 34c02a81fbSAndrew F. Davis */ 35c02a81fbSAndrew F. Davis struct dma_heap_allocation_data { 36c02a81fbSAndrew F. Davis __u64 len; 37c02a81fbSAndrew F. Davis __u32 fd; 38c02a81fbSAndrew F. Davis __u32 fd_flags; 39c02a81fbSAndrew F. Davis __u64 heap_flags; 40c02a81fbSAndrew F. Davis }; 41c02a81fbSAndrew F. Davis 42c02a81fbSAndrew F. Davis #define DMA_HEAP_IOC_MAGIC 'H' 43c02a81fbSAndrew F. Davis 44c02a81fbSAndrew F. Davis /** 45*b3b43465SAndrew F. Davis * DOC: DMA_HEAP_IOCTL_ALLOC - allocate memory from pool 46c02a81fbSAndrew F. Davis * 47c02a81fbSAndrew F. Davis * Takes a dma_heap_allocation_data struct and returns it with the fd field 48c02a81fbSAndrew F. Davis * populated with the dmabuf handle of the allocation. 49c02a81fbSAndrew F. Davis */ 50*b3b43465SAndrew F. Davis #define DMA_HEAP_IOCTL_ALLOC _IOWR(DMA_HEAP_IOC_MAGIC, 0x0,\ 51c02a81fbSAndrew F. Davis struct dma_heap_allocation_data) 52c02a81fbSAndrew F. Davis 53c02a81fbSAndrew F. Davis #endif /* _UAPI_LINUX_DMABUF_POOL_H */ 54