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