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