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788ef64a2c
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3 Commits

Author SHA1 Message Date
Oleksandr Andrushchenko
788ef64a2c ALSA: xen-front: Implement Xen event channel handling 
Handle Xen event channels:
  - create for all configured streams and publish
    corresponding ring references and event channels in Xen store,
    so backend can connect
  - implement event channels interrupt handlers
  - create and destroy event channels with respect to Xen bus state

Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
 2018-05-16 12:58:41 +02:00
Oleksandr Andrushchenko
fd3b36045c ALSA: xen-front: Read sound driver configuration from Xen store 
Read configuration values from Xen store according
to xen/interface/io/sndif.h protocol:
  - introduce configuration structures for different
    components, e.g. sound card, device, stream
  - read PCM HW parameters, e.g rate, format etc.
  - detect stream type (capture/playback)
  - read device and card parameters

Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
 2018-05-16 12:58:39 +02:00
Oleksandr Andrushchenko
cc3196ae19 ALSA: xen-front: Introduce Xen para-virtualized sound frontend driver 
Introduce skeleton of the para-virtualized Xen sound
frontend driver.

Initial handling for Xen bus states: implement
Xen bus state machine for the frontend driver according to
the state diagram and recovery flow from sound para-virtualized
protocol: xen/interface/io/sndif.h.

Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
 2018-05-16 12:58:36 +02:00