On 01/18/2017 06:31 AM, Ughreja, Rakesh A wrote:
-----Original Message-----
From: Stefano Stabellini [mailto:sstabell...@kernel.org]
Sent: Wednesday, January 18, 2017 5:41 AM
To: Ughreja, Rakesh A <rakesh.a.ughr...@intel.com>
Cc: xen-devel@lists.xen.org; oleksandr_andrushche...@epam.com;
oleksandr_gryt...@epam.com; oleksandr.dmytrys...@globallogic.com;
iurii.konovale...@globallogic.com; konrad.w...@oracle.com
Subject: Re: [Xen-devel] PV audio drivers for Linux
On Tue, 17 Jan 2017, Ughreja, Rakesh A wrote:
Hi,
I am trying to develop PV audio drivers and facing one issue to
achieve zero copy of the buffers between Front End (DOM1) and
Back End (DOM0) drivers.
You might want to take a look at the existing PV sound proposal:
http://marc.info/?l=xen-devel&m=148094319010445
Sure, let me look into this.
Thank you very much for the quick reply and the reference.
And here we are working on sound, display (DRM), multi-touch
PV frontends [1], generic backend user-space library [2]
and the corresponding user-space backends [3], [4].
Please take a look at the Dom0 zero-copy driver for DRM [5]
Please note, that we haven't considered zero-copy for sound
(ALSA) yet, but for DRM only.
[1] https://github.com/andr2000/linux/tree/xen-pv-devel-4.10-rc2
[2] https://github.com/al1img/libxenbe
[3] https://github.com/al1img/displ_be
[4] https://github.com/al1img/snd_be
[5]
https://github.com/andr2000/linux/blob/xen-pv-devel-4.10-rc2/drivers/gpu/drm/xen/xen_drm_zcopy.c
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