19 Dec, 2018

1 commit

• 58f9d806d   ALSA: xen-front: Use Xen common shared buffer implementation ... Browse Code »

  Use page directory based shared buffer implementation
  now available as common code for Xen frontend drivers.

  Signed-off-by: Oleksandr Andrushchenko
  Reviewed-by: Takashi Iwai
  Signed-off-by: Boris Ostrovsky

  Oleksandr Andrushchenko

  2018-12-19 01:19:37 +0800  

16 May, 2018

5 commits

• 1cee55935   ALSA: xen-front: Implement ALSA virtual sound driver ... Browse Code »

  Implement essential initialization of the sound driver:
  - introduce required data structures
  - handle driver registration
  - handle sound card registration
  - register sound driver on backend connection
  - remove sound driver on backend disconnect

  Initialize virtual sound card with streams according to the
  Xen store configuration.

  Implement ALSA driver operations including:
  - manage frontend/backend shared buffers
  - manage Xen bus event channel states

  Implement requests from front to back for ALSA
  PCM operations.
  - report ALSA period elapsed event: handle XENSND_EVT_CUR_POS
  notifications from the backend when stream position advances
  during playback/capture. The event carries a value of how
  many octets were played/captured at the time of the event.
  - implement explicit stream parameter negotiation between
  backend and frontend: handle XENSND_OP_HW_PARAM_QUERY request
  to read/update configuration space for the parameter given:
  request passes desired parameter interval and the response to
  this request returns min/max interval for the parameter to be used.

  Signed-off-by: Oleksandr Andrushchenko
  Signed-off-by: Takashi Iwai

  Oleksandr Andrushchenko

  2018-05-16 18:59:57 +0800  
• d6e0fbb82   ALSA: xen-front: Implement handling of shared buffers ... Browse Code »

  Implement shared buffer handling according to the
  para-virtualized sound device protocol at xen/interface/io/sndif.h:
  - manage buffer memory
  - handle granted references
  - handle page directories

  [ Fixed missing linux/kernel.h inclusion -- tiwai ]

  Signed-off-by: Oleksandr Andrushchenko
  Signed-off-by: Takashi Iwai

  Oleksandr Andrushchenko

  2018-05-16 18:59:50 +0800  
• 788ef64a2   ALSA: xen-front: Implement Xen event channel handling ... Browse Code »

  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
  Signed-off-by: Takashi Iwai

  Oleksandr Andrushchenko

  2018-05-16 18:58:41 +0800  
• fd3b36045   ALSA: xen-front: Read sound driver configuration from Xen store ... Browse Code »

  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
  Signed-off-by: Takashi Iwai

  Oleksandr Andrushchenko

  2018-05-16 18:58:39 +0800  
• cc3196ae1   ALSA: xen-front: Introduce Xen para-virtualized sound frontend driver ... Browse Code »

  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
  Reviewed-by: Juergen Gross
  Signed-off-by: Takashi Iwai

  Oleksandr Andrushchenko

  2018-05-16 18:58:36 +0800