From: Oleksandr Andrushchenko <andr2000@gmail.com>
To: xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org,
alsa-devel@alsa-project.org, jgross@suse.com,
boris.ostrovsky@oracle.com, konrad.wilk@oracle.com,
perex@perex.cz, tiwai@suse.com
Cc: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Subject: Re: [PATCH v2 0/5] ALSA: xen-front: Add Xen para-virtualized frontend driver
Date: Wed, 2 May 2018 10:59:49 +0300 [thread overview]
Message-ID: <632c83d7-feb7-bc36-bf4d-22145dfeccb0@gmail.com> (raw)
In-Reply-To: <20180416062453.24743-1-andr2000@gmail.com>
Gentle reminder...
I think that Xen side comments are already there and still I miss
some input from ALSA community on patch #5.
Thank you,
Oleksandr
On 04/16/2018 09:24 AM, Oleksandr Andrushchenko wrote:
> From: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
>
> Please note: this patch series depends on [3].
>
> This patch series adds support for Xen [1] para-virtualized
> sound frontend driver. It implements the protocol from
> include/xen/interface/io/sndif.h with the following limitations:
> - mute/unmute is not supported
> - get/set volume is not supported
> Volume control is not supported for the reason that most of the
> use-cases (at the moment) are based on scenarious where
> unprivileged OS (e.g. Android, AGL etc) use software mixers.
>
> Both capture and playback are supported.
>
> Corresponding backend, implemented as a user-space application, can be
> found at [2].
>
> Thank you,
> Oleksandr
>
> Changes since v1:
> *****************
>
> 1. Moved driver from sound/drivers to sound/xen
>
> 2. Coding style changes to better meet Linux Kernel
>
> 3. Added explicit back and front synchronization
> In order to provide explicit synchronization between backend and
> frontend the following changes are introduced in the protocol:
> - add new ring buffer for sending asynchronous events from
> backend to frontend to report number of bytes played by the
> frontend (XENSND_EVT_CUR_POS)
> - introduce trigger events for playback control: start/stop/pause/resume
> - add "req-" prefix to event-channel and ring-ref to unify naming
> of the Xen event channels for requests and events
>
> 4. Added explicit back and front parameter negotiation
> In order to provide explicit stream parameter negotiation between
> backend and frontend the following changes are introduced in the protocol:
> add XENSND_OP_HW_PARAM_QUERY request to read/update
> configuration space for the parameters given: request passes
> desired parameter's intervals/masks and the response to this request
> returns allowed min/max intervals/masks to be used.
>
> [1] https://xenproject.org/
> [2] https://github.com/xen-troops/snd_be
> [3] https://lkml.org/lkml/2018/4/12/522
>
> Oleksandr Andrushchenko (5):
> ALSA: xen-front: Introduce Xen para-virtualized sound frontend driver
> ALSA: xen-front: Read sound driver configuration from Xen store
> ALSA: xen-front: Implement Xen event channel handling
> ALSA: xen-front: Implement handling of shared buffers
> ALSA: xen-front: Implement ALSA virtual sound driver
>
> sound/Kconfig | 2 +
> sound/Makefile | 2 +-
> sound/xen/Kconfig | 10 +
> sound/xen/Makefile | 9 +
> sound/xen/xen_snd_front.c | 410 +++++++++++++++++++
> sound/xen/xen_snd_front.h | 57 +++
> sound/xen/xen_snd_front_alsa.c | 830 ++++++++++++++++++++++++++++++++++++++
> sound/xen/xen_snd_front_alsa.h | 23 ++
> sound/xen/xen_snd_front_cfg.c | 517 ++++++++++++++++++++++++
> sound/xen/xen_snd_front_cfg.h | 46 +++
> sound/xen/xen_snd_front_evtchnl.c | 478 ++++++++++++++++++++++
> sound/xen/xen_snd_front_evtchnl.h | 92 +++++
> sound/xen/xen_snd_front_shbuf.c | 193 +++++++++
> sound/xen/xen_snd_front_shbuf.h | 36 ++
> 14 files changed, 2704 insertions(+), 1 deletion(-)
> create mode 100644 sound/xen/Kconfig
> create mode 100644 sound/xen/Makefile
> create mode 100644 sound/xen/xen_snd_front.c
> create mode 100644 sound/xen/xen_snd_front.h
> create mode 100644 sound/xen/xen_snd_front_alsa.c
> create mode 100644 sound/xen/xen_snd_front_alsa.h
> create mode 100644 sound/xen/xen_snd_front_cfg.c
> create mode 100644 sound/xen/xen_snd_front_cfg.h
> create mode 100644 sound/xen/xen_snd_front_evtchnl.c
> create mode 100644 sound/xen/xen_snd_front_evtchnl.h
> create mode 100644 sound/xen/xen_snd_front_shbuf.c
> create mode 100644 sound/xen/xen_snd_front_shbuf.h
>
prev parent reply other threads:[~2018-05-02 7:59 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-16 6:24 [PATCH v2 0/5] ALSA: xen-front: Add Xen para-virtualized frontend driver Oleksandr Andrushchenko
2018-04-16 6:24 ` [PATCH v2 1/5] ALSA: xen-front: Introduce Xen para-virtualized sound " Oleksandr Andrushchenko
2018-04-16 12:25 ` Juergen Gross
2018-04-17 8:24 ` Oleksandr Andrushchenko
2018-04-24 13:55 ` Takashi Iwai
2018-04-24 13:59 ` Oleksandr Andrushchenko
2018-04-16 6:24 ` [PATCH v2 2/5] ALSA: xen-front: Read sound driver configuration from Xen store Oleksandr Andrushchenko
2018-04-16 12:55 ` Juergen Gross
2018-04-17 8:42 ` Oleksandr Andrushchenko
2018-04-17 11:08 ` Juergen Gross
2018-04-16 6:24 ` [PATCH v2 3/5] ALSA: xen-front: Implement Xen event channel handling Oleksandr Andrushchenko
2018-04-16 13:12 ` Juergen Gross
2018-04-17 8:58 ` Oleksandr Andrushchenko
2018-04-17 11:14 ` Juergen Gross
2018-04-17 11:21 ` Oleksandr Andrushchenko
2018-04-16 13:53 ` kbuild test robot
2018-04-24 14:20 ` Takashi Iwai
2018-04-24 14:29 ` Oleksandr Andrushchenko
2018-04-24 14:35 ` Takashi Iwai
2018-04-24 14:58 ` Oleksandr Andrushchenko
2018-04-24 15:02 ` Takashi Iwai
2018-04-24 16:23 ` Oleksandr Andrushchenko
2018-04-25 8:26 ` Oleksandr Andrushchenko
2018-04-25 9:02 ` Takashi Iwai
2018-04-25 9:04 ` Oleksandr Andrushchenko
2018-04-16 6:24 ` [PATCH v2 4/5] ALSA: xen-front: Implement handling of shared buffers Oleksandr Andrushchenko
2018-04-16 13:39 ` Juergen Gross
2018-04-17 9:22 ` Oleksandr Andrushchenko
2018-04-17 11:15 ` Juergen Gross
2018-04-16 6:24 ` [PATCH v2 5/5] ALSA: xen-front: Implement ALSA virtual sound driver Oleksandr Andrushchenko
2018-04-16 14:09 ` Juergen Gross
2018-04-17 11:32 ` Oleksandr Andrushchenko
2018-04-17 12:26 ` Oleksandr Andrushchenko
2018-04-17 12:32 ` Juergen Gross
2018-04-17 12:34 ` Oleksandr Andrushchenko
2018-04-16 14:59 ` kbuild test robot
2018-04-17 12:42 ` [PATCH v2 0/5] ALSA: xen-front: Add Xen para-virtualized frontend driver Oleksandr Andrushchenko
2018-04-18 15:15 ` Oleksandr Andrushchenko
2018-04-23 6:34 ` Oleksandr Andrushchenko
2018-05-02 7:59 ` Oleksandr Andrushchenko [this message]
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