/* SPDX-License-Identifier: GPL-2.0 OR MIT */ /* * Xen para-virtual sound device * * Copyright (C) 2016-2018 EPAM Systems Inc. * * Author: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> */ #ifndef __XEN_SND_FRONT_H #define __XEN_SND_FRONT_H #include "xen_snd_front_cfg.h" struct xen_snd_front_card_info; struct xen_snd_front_evtchnl; struct xen_snd_front_evtchnl_pair; struct xen_snd_front_shbuf; struct xensnd_query_hw_param; struct xen_snd_front_info { struct xenbus_device *xb_dev; struct xen_snd_front_card_info *card_info; int num_evt_pairs; struct xen_snd_front_evtchnl_pair *evt_pairs; struct xen_front_cfg_card cfg; }; int xen_snd_front_stream_query_hw_param(struct xen_snd_front_evtchnl *evtchnl, struct xensnd_query_hw_param *hw_param_req, struct xensnd_query_hw_param *hw_param_resp); int xen_snd_front_stream_prepare(struct xen_snd_front_evtchnl *evtchnl, struct xen_snd_front_shbuf *sh_buf, u8 format, unsigned int channels, unsigned int rate, u32 buffer_sz, u32 period_sz); int xen_snd_front_stream_close(struct xen_snd_front_evtchnl *evtchnl); int xen_snd_front_stream_write(struct xen_snd_front_evtchnl *evtchnl, unsigned long pos, unsigned long count); int xen_snd_front_stream_read(struct xen_snd_front_evtchnl *evtchnl, unsigned long pos, unsigned long count); int xen_snd_front_stream_trigger(struct xen_snd_front_evtchnl *evtchnl, int type); #endif /* __XEN_SND_FRONT_H */