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58f9d806d1
Use page directory based shared buffer implementation now available as common code for Xen frontend drivers. Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Reviewed-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR MIT */
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/*
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* Xen para-virtual sound device
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*
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* Copyright (C) 2016-2018 EPAM Systems Inc.
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*
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* Author: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
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*/
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#ifndef __XEN_SND_FRONT_H
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#define __XEN_SND_FRONT_H
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#include "xen_snd_front_cfg.h"
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struct xen_snd_front_card_info;
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struct xen_snd_front_evtchnl;
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struct xen_snd_front_evtchnl_pair;
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struct xen_front_pgdir_shbuf;
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struct xensnd_query_hw_param;
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struct xen_snd_front_info {
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struct xenbus_device *xb_dev;
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struct xen_snd_front_card_info *card_info;
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int num_evt_pairs;
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struct xen_snd_front_evtchnl_pair *evt_pairs;
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struct xen_front_cfg_card cfg;
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};
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int xen_snd_front_stream_query_hw_param(struct xen_snd_front_evtchnl *evtchnl,
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struct xensnd_query_hw_param *hw_param_req,
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struct xensnd_query_hw_param *hw_param_resp);
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int xen_snd_front_stream_prepare(struct xen_snd_front_evtchnl *evtchnl,
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struct xen_front_pgdir_shbuf *shbuf,
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u8 format, unsigned int channels,
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unsigned int rate, u32 buffer_sz,
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u32 period_sz);
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int xen_snd_front_stream_close(struct xen_snd_front_evtchnl *evtchnl);
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int xen_snd_front_stream_write(struct xen_snd_front_evtchnl *evtchnl,
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unsigned long pos, unsigned long count);
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int xen_snd_front_stream_read(struct xen_snd_front_evtchnl *evtchnl,
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unsigned long pos, unsigned long count);
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int xen_snd_front_stream_trigger(struct xen_snd_front_evtchnl *evtchnl,
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int type);
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#endif /* __XEN_SND_FRONT_H */
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