| 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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| 2 | /* industrial I/O buffer definitions needed both in and out of kernel |
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| 3 | */ |
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| 4 | |
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| 5 | #ifndef _UAPI_IIO_BUFFER_H_ |
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| 6 | #define _UAPI_IIO_BUFFER_H_ |
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| 7 | |
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| 8 | #include <linux/types.h> |
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| 9 | |
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| 10 | /* Flags for iio_dmabuf.flags */ |
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| 11 | #define IIO_BUFFER_DMABUF_CYCLIC (1 << 0) |
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| 12 | #define IIO_BUFFER_DMABUF_SUPPORTED_FLAGS 0x00000001 |
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| 13 | |
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| 14 | /** |
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| 15 | * struct iio_dmabuf - Descriptor for a single IIO DMABUF object |
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| 16 | * @fd: file descriptor of the DMABUF object |
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| 17 | * @flags: one or more IIO_BUFFER_DMABUF_* flags |
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| 18 | * @bytes_used: number of bytes used in this DMABUF for the data transfer. |
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| 19 | * Should generally be set to the DMABUF's size. |
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| 20 | */ |
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| 21 | struct iio_dmabuf { |
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| 22 | __u32 fd; |
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| 23 | __u32 flags; |
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| 24 | __u64 bytes_used; |
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| 25 | }; |
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| 26 | |
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| 27 | #define IIO_BUFFER_GET_FD_IOCTL _IOWR('i', 0x91, int) |
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| 28 | #define IIO_BUFFER_DMABUF_ATTACH_IOCTL _IOW('i', 0x92, int) |
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| 29 | #define IIO_BUFFER_DMABUF_DETACH_IOCTL _IOW('i', 0x93, int) |
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| 30 | #define IIO_BUFFER_DMABUF_ENQUEUE_IOCTL _IOW('i', 0x94, struct iio_dmabuf) |
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| 31 | |
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| 32 | #endif /* _UAPI_IIO_BUFFER_H_ */ |
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| 33 | |
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