From: Oleksandr Andrushchenko <andr2000@gmail.com> To: alsa-devel@alsa-project.org, xen-devel@lists.xen.org, linux-kernel@vger.kernel.org Cc: perex@perex.cz, tiwai@suse.com, andr2000@gmail.com, Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Subject: [PATCH 01/11] ALSA: vsnd: Implement driver's probe/remove Date: Mon, 7 Aug 2017 10:43:06 +0300 [thread overview] Message-ID: <1502091796-14413-2-git-send-email-andr2000@gmail.com> (raw) In-Reply-To: <1502091796-14413-1-git-send-email-andr2000@gmail.com> From: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Add essential driver private info structure, initialize locks and implement probe/remove of the Xen frontend driver. Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> --- sound/drivers/xen-front.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/sound/drivers/xen-front.c b/sound/drivers/xen-front.c index 61779c36cae3..8c5de7b0e7b5 100644 --- a/sound/drivers/xen-front.c +++ b/sound/drivers/xen-front.c @@ -26,6 +26,16 @@ #include <xen/interface/io/sndif.h> +struct xdrv_info { + struct xenbus_device *xb_dev; + spinlock_t io_lock; + struct mutex mutex; +}; + +static void xdrv_remove_internal(struct xdrv_info *drv_info) +{ +} + static void xdrv_be_on_changed(struct xenbus_device *xb_dev, enum xenbus_state backend_state) { @@ -34,11 +44,28 @@ static void xdrv_be_on_changed(struct xenbus_device *xb_dev, static int xdrv_probe(struct xenbus_device *xb_dev, const struct xenbus_device_id *id) { + struct xdrv_info *drv_info; + + drv_info = devm_kzalloc(&xb_dev->dev, sizeof(*drv_info), GFP_KERNEL); + if (!drv_info) { + xenbus_dev_fatal(xb_dev, -ENOMEM, "allocating device memory"); + return -ENOMEM; + } + + drv_info->xb_dev = xb_dev; + spin_lock_init(&drv_info->io_lock); + mutex_init(&drv_info->mutex); + dev_set_drvdata(&xb_dev->dev, drv_info); return 0; } static int xdrv_remove(struct xenbus_device *dev) { + struct xdrv_info *drv_info = dev_get_drvdata(&dev->dev); + + mutex_lock(&drv_info->mutex); + xdrv_remove_internal(drv_info); + mutex_unlock(&drv_info->mutex); return 0; } -- 2.7.4
WARNING: multiple messages have this Message-ID (diff)
From: Oleksandr Andrushchenko <andr2000@gmail.com> To: alsa-devel@alsa-project.org, xen-devel@lists.xen.org, linux-kernel@vger.kernel.org Cc: andr2000@gmail.com, Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>, tiwai@suse.com, perex@perex.cz Subject: [PATCH 01/11] ALSA: vsnd: Implement driver's probe/remove Date: Mon, 7 Aug 2017 10:43:06 +0300 [thread overview] Message-ID: <1502091796-14413-2-git-send-email-andr2000@gmail.com> (raw) In-Reply-To: <1502091796-14413-1-git-send-email-andr2000@gmail.com> From: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Add essential driver private info structure, initialize locks and implement probe/remove of the Xen frontend driver. Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> --- sound/drivers/xen-front.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/sound/drivers/xen-front.c b/sound/drivers/xen-front.c index 61779c36cae3..8c5de7b0e7b5 100644 --- a/sound/drivers/xen-front.c +++ b/sound/drivers/xen-front.c @@ -26,6 +26,16 @@ #include <xen/interface/io/sndif.h> +struct xdrv_info { + struct xenbus_device *xb_dev; + spinlock_t io_lock; + struct mutex mutex; +}; + +static void xdrv_remove_internal(struct xdrv_info *drv_info) +{ +} + static void xdrv_be_on_changed(struct xenbus_device *xb_dev, enum xenbus_state backend_state) { @@ -34,11 +44,28 @@ static void xdrv_be_on_changed(struct xenbus_device *xb_dev, static int xdrv_probe(struct xenbus_device *xb_dev, const struct xenbus_device_id *id) { + struct xdrv_info *drv_info; + + drv_info = devm_kzalloc(&xb_dev->dev, sizeof(*drv_info), GFP_KERNEL); + if (!drv_info) { + xenbus_dev_fatal(xb_dev, -ENOMEM, "allocating device memory"); + return -ENOMEM; + } + + drv_info->xb_dev = xb_dev; + spin_lock_init(&drv_info->io_lock); + mutex_init(&drv_info->mutex); + dev_set_drvdata(&xb_dev->dev, drv_info); return 0; } static int xdrv_remove(struct xenbus_device *dev) { + struct xdrv_info *drv_info = dev_get_drvdata(&dev->dev); + + mutex_lock(&drv_info->mutex); + xdrv_remove_internal(drv_info); + mutex_unlock(&drv_info->mutex); return 0; } -- 2.7.4 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
next prev parent reply other threads:[~2017-08-07 7:46 UTC|newest] Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-08-07 7:43 [PATCH 00/11] ALSA: vsnd: Add Xen para-virtualized frontend driver Oleksandr Andrushchenko 2017-08-07 7:43 ` Oleksandr Andrushchenko [this message] 2017-08-07 7:43 ` [PATCH 01/11] ALSA: vsnd: Implement driver's probe/remove Oleksandr Andrushchenko 2017-08-07 7:43 ` [PATCH 02/11] ALSA: vsnd: Implement Xen bus state handling Oleksandr Andrushchenko 2017-08-07 7:43 ` Oleksandr Andrushchenko 2017-08-07 7:43 ` [PATCH 03/11] ALSA: vsnd: Read sound driver configuration from Xen store Oleksandr Andrushchenko 2017-08-07 7:43 ` Oleksandr Andrushchenko 2017-08-07 7:43 ` [PATCH 04/11] ALSA: vsnd: Implement Xen event channel handling Oleksandr Andrushchenko 2017-08-07 7:43 ` Oleksandr Andrushchenko 2017-08-07 7:43 ` [PATCH 05/11] ALSA: vsnd: Implement handling of shared buffers Oleksandr Andrushchenko 2017-08-07 7:43 ` Oleksandr Andrushchenko 2017-08-07 7:43 ` [PATCH 06/11] ALSA: vsnd: Introduce ALSA virtual sound driver Oleksandr Andrushchenko 2017-08-07 7:43 ` Oleksandr Andrushchenko 2017-08-07 7:43 ` [PATCH 07/11] ALSA: vsnd: Initialize virtul sound card Oleksandr Andrushchenko 2017-08-07 7:43 ` Oleksandr Andrushchenko 2017-08-07 7:43 ` [PATCH 08/11] ALSA: vsnd: Add timer for period interrupt emulation Oleksandr Andrushchenko 2017-08-07 7:43 ` Oleksandr Andrushchenko 2017-08-07 10:27 ` [alsa-devel] " Clemens Ladisch 2017-08-07 10:27 ` Clemens Ladisch 2017-08-07 10:27 ` Clemens Ladisch 2017-08-07 11:30 ` [alsa-devel] " Oleksandr Andrushchenko 2017-08-07 11:30 ` Oleksandr Andrushchenko 2017-08-07 13:11 ` Clemens Ladisch 2017-08-07 13:38 ` Oleksandr Andrushchenko 2017-08-07 13:38 ` Oleksandr Andrushchenko 2017-08-07 13:55 ` Clemens Ladisch 2017-08-07 13:55 ` Clemens Ladisch 2017-08-07 15:14 ` Oleksandr Andrushchenko 2017-08-08 6:09 ` Oleksandr Andrushchenko 2017-08-08 6:09 ` Oleksandr Andrushchenko 2017-08-07 15:14 ` Oleksandr Andrushchenko 2017-08-07 13:11 ` Clemens Ladisch 2017-08-07 7:43 ` [PATCH 09/11] ALSA: vsnd: Implement ALSA PCM operations Oleksandr Andrushchenko 2017-08-07 7:43 ` Oleksandr Andrushchenko 2017-08-07 7:43 ` [PATCH 10/11] ALSA: vsnd: Implement communication with backend Oleksandr Andrushchenko 2017-08-07 7:43 ` Oleksandr Andrushchenko 2017-08-07 7:43 ` [PATCH 11/11] ALSA: vsnd: Introduce Kconfig option to enable Xen PV sound Oleksandr Andrushchenko 2017-08-07 7:43 ` Oleksandr Andrushchenko 2017-08-07 11:28 ` [PATCH 00/11] ALSA: vsnd: Add Xen para-virtualized frontend driver Takashi Sakamoto 2017-08-07 11:28 ` Takashi Sakamoto 2017-08-07 11:33 ` Oleksandr Andrushchenko 2017-08-07 11:33 ` Oleksandr Andrushchenko 2017-08-07 11:28 ` Takashi Sakamoto
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