kernel/git/stable/linux.git/sound/xen/Makefile, branch master

ALSA: misc: Use -y instead of -objs in Makefile

2024-05-08T16:18:13+00:00

*-objs suffix is reserved rather for (user-space) host programs while usually *-y suffix is used for kernel drivers (although *-objs works for that purpose for now). Let's correct the old usages of *-objs in Makefiles. Signed-off-by: Takashi Iwai Reviewed-by: Andy Shevchenko Reviewed-by: Jaroslav Kysela Link: https://lore.kernel.org/r/20240507135513.14919-10-tiwai@suse.de

ALSA: xen-front: Use Xen common shared buffer implementation

2018-12-18T17:19:37+00:00

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

ALSA: xen-front: Implement ALSA virtual sound driver

2018-05-16T10:59:57+00:00

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

ALSA: xen-front: Implement handling of shared buffers

2018-05-16T10:59:50+00:00

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

ALSA: xen-front: Implement Xen event channel handling

2018-05-16T10:58:41+00:00

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

ALSA: xen-front: Read sound driver configuration from Xen store

2018-05-16T10:58:39+00:00

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

ALSA: xen-front: Introduce Xen para-virtualized sound frontend driver

2018-05-16T10:58:36+00:00

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