1f73f7f4dSAlexandru Ardelean /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2f73f7f4dSAlexandru Ardelean /* industrial I/O buffer definitions needed both in and out of kernel 3f73f7f4dSAlexandru Ardelean */ 4f73f7f4dSAlexandru Ardelean 5f73f7f4dSAlexandru Ardelean #ifndef _UAPI_IIO_BUFFER_H_ 6f73f7f4dSAlexandru Ardelean #define _UAPI_IIO_BUFFER_H_ 7f73f7f4dSAlexandru Ardelean 8*3e26d9f0SPaul Cercueil #include <linux/types.h> 9*3e26d9f0SPaul Cercueil 10*3e26d9f0SPaul Cercueil /* Flags for iio_dmabuf.flags */ 11*3e26d9f0SPaul Cercueil #define IIO_BUFFER_DMABUF_CYCLIC (1 << 0) 12*3e26d9f0SPaul Cercueil #define IIO_BUFFER_DMABUF_SUPPORTED_FLAGS 0x00000001 13*3e26d9f0SPaul Cercueil 14*3e26d9f0SPaul Cercueil /** 15*3e26d9f0SPaul Cercueil * struct iio_dmabuf - Descriptor for a single IIO DMABUF object 16*3e26d9f0SPaul Cercueil * @fd: file descriptor of the DMABUF object 17*3e26d9f0SPaul Cercueil * @flags: one or more IIO_BUFFER_DMABUF_* flags 18*3e26d9f0SPaul Cercueil * @bytes_used: number of bytes used in this DMABUF for the data transfer. 19*3e26d9f0SPaul Cercueil * Should generally be set to the DMABUF's size. 20*3e26d9f0SPaul Cercueil */ 21*3e26d9f0SPaul Cercueil struct iio_dmabuf { 22*3e26d9f0SPaul Cercueil __u32 fd; 23*3e26d9f0SPaul Cercueil __u32 flags; 24*3e26d9f0SPaul Cercueil __u64 bytes_used; 25*3e26d9f0SPaul Cercueil }; 26*3e26d9f0SPaul Cercueil 27f73f7f4dSAlexandru Ardelean #define IIO_BUFFER_GET_FD_IOCTL _IOWR('i', 0x91, int) 28*3e26d9f0SPaul Cercueil #define IIO_BUFFER_DMABUF_ATTACH_IOCTL _IOW('i', 0x92, int) 29*3e26d9f0SPaul Cercueil #define IIO_BUFFER_DMABUF_DETACH_IOCTL _IOW('i', 0x93, int) 30*3e26d9f0SPaul Cercueil #define IIO_BUFFER_DMABUF_ENQUEUE_IOCTL _IOW('i', 0x94, struct iio_dmabuf) 31f73f7f4dSAlexandru Ardelean 32f73f7f4dSAlexandru Ardelean #endif /* _UAPI_IIO_BUFFER_H_ */ 33