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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */2/* industrial I/O buffer definitions needed both in and out of kernel3 */4 5#ifndef _UAPI_IIO_BUFFER_H_6#define _UAPI_IIO_BUFFER_H_7 8#include <linux/types.h>9 10/* Flags for iio_dmabuf.flags */11#define IIO_BUFFER_DMABUF_CYCLIC (1 << 0)12#define IIO_BUFFER_DMABUF_SUPPORTED_FLAGS 0x0000000113 14/**15 * struct iio_dmabuf - Descriptor for a single IIO DMABUF object16 * @fd: file descriptor of the DMABUF object17 * @flags: one or more IIO_BUFFER_DMABUF_* flags18 * @bytes_used: number of bytes used in this DMABUF for the data transfer.19 * Should generally be set to the DMABUF's size.20 */21struct iio_dmabuf {22 __u32 fd;23 __u32 flags;24 __u64 bytes_used;25};26 27#define IIO_BUFFER_GET_FD_IOCTL _IOWR('i', 0x91, int)28#define IIO_BUFFER_DMABUF_ATTACH_IOCTL _IOW('i', 0x92, int)29#define IIO_BUFFER_DMABUF_DETACH_IOCTL _IOW('i', 0x93, int)30#define IIO_BUFFER_DMABUF_ENQUEUE_IOCTL _IOW('i', 0x94, struct iio_dmabuf)31 32#endif /* _UAPI_IIO_BUFFER_H_ */33