33 lines
1000 B
C
33 lines
1000 B
C
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/* industrial I/O buffer definitions needed both in and out of kernel
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*/
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#ifndef _UAPI_IIO_BUFFER_H_
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#define _UAPI_IIO_BUFFER_H_
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#include <linux/types.h>
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/* Flags for iio_dmabuf.flags */
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#define IIO_BUFFER_DMABUF_CYCLIC (1 << 0)
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#define IIO_BUFFER_DMABUF_SUPPORTED_FLAGS 0x00000001
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/**
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* struct iio_dmabuf - Descriptor for a single IIO DMABUF object
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* @fd: file descriptor of the DMABUF object
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* @flags: one or more IIO_BUFFER_DMABUF_* flags
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* @bytes_used: number of bytes used in this DMABUF for the data transfer.
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* Should generally be set to the DMABUF's size.
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*/
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struct iio_dmabuf {
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__u32 fd;
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__u32 flags;
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__u64 bytes_used;
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};
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#define IIO_BUFFER_GET_FD_IOCTL _IOWR('i', 0x91, int)
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#define IIO_BUFFER_DMABUF_ATTACH_IOCTL _IOW('i', 0x92, int)
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#define IIO_BUFFER_DMABUF_DETACH_IOCTL _IOW('i', 0x93, int)
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#define IIO_BUFFER_DMABUF_ENQUEUE_IOCTL _IOW('i', 0x94, struct iio_dmabuf)
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#endif /* _UAPI_IIO_BUFFER_H_ */
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