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treewide: Add SPDX license identifier - Makefile/Kconfig Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>6 年前
ALSA: xen-front: Use Xen common shared buffer implementation Use page directory based shared buffer implementation now available as common code for Xen frontend drivers. Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Reviewed-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>7 年前
ALSA: xen: Remove superfluous fall through comments The "fall through" comments found in switch-cases in ALSA xen driver are all superfluous. The kernel coding style allows the multiple cases in a row. Let's remove them. Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Link: https://lore.kernel.org/r/20200709111750.8337-3-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>5 年前
ALSA: xen-front: Use Xen common shared buffer implementation Use page directory based shared buffer implementation now available as common code for Xen frontend drivers. Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Reviewed-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>7 年前
ALSA: xen: Drop superfluous ioctl PCM ops PCM core deals the empty ioctl field now as default(*). Let's kill the redundant lines. (*) commit fc033cbf6fb7 ("ALSA: pcm: Allow NULL ioctl ops") Link: https://lore.kernel.org/r/20191210061145.24641-24-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>6 年前
ALSA: xen-front: Implement ALSA virtual sound driver 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 <oleksandr_andrushchenko@epam.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>7 年前
ALSA: xen-front: freeing an error pointer kfree() doesn't accept error pointers so I've set "str" to NULL on these paths. Fixes: fd3b36045c2c ("ALSA: xen-front: Read sound driver configuration from Xen store") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>7 年前
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>7 年前
ALSA: xen: Remove superfluous fall through comments The "fall through" comments found in switch-cases in ALSA xen driver are all superfluous. The kernel coding style allows the multiple cases in a row. Let's remove them. Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Link: https://lore.kernel.org/r/20200709111750.8337-3-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>5 年前
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>7 年前