From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Vrabel Subject: [PATCH 09/16] xen/events: add a evtchn_op for port setup Date: Wed, 2 Oct 2013 18:14:54 +0100 Message-ID: <1380734101-2991-10-git-send-email-david.vrabel@citrix.com> References: <1380734101-2991-1-git-send-email-david.vrabel@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1380734101-2991-1-git-send-email-david.vrabel@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel@lists.xen.org Cc: Boris Ostrovsky , David Vrabel , Jan Beulich List-Id: xen-devel@lists.xenproject.org From: David Vrabel Add a hook for port-specific setup and call it from xen_irq_info_common_setup(). The FIFO-based ABIs may need to perform additional setup (expanding the event array) before a bound event channel can start to receive events. Signed-off-by: David Vrabel --- drivers/xen/events/events.c | 2 +- drivers/xen/events/events_internal.h | 12 ++++++++++++ 2 files changed, 13 insertions(+), 1 deletions(-) diff --git a/drivers/xen/events/events.c b/drivers/xen/events/events.c index 8f55a49..cf1c7ba 100644 --- a/drivers/xen/events/events.c +++ b/drivers/xen/events/events.c @@ -117,7 +117,7 @@ static int xen_irq_info_common_setup(struct irq_info *info, irq_clear_status_flags(irq, IRQ_NOREQUEST|IRQ_NOAUTOEN); - return 0; + return xen_evtchn_port_setup(info); } static int xen_irq_info_evtchn_setup(unsigned irq, diff --git a/drivers/xen/events/events_internal.h b/drivers/xen/events/events_internal.h index ba88f57..3eb573a 100644 --- a/drivers/xen/events/events_internal.h +++ b/drivers/xen/events/events_internal.h @@ -55,6 +55,7 @@ struct irq_info { #define PIRQ_SHAREABLE (1 << 1) struct evtchn_ops { + int (*setup)(struct irq_info *info); void (*bind_to_cpu)(struct irq_info *info, unsigned cpu); void (*clear_pending)(unsigned port); @@ -75,6 +76,17 @@ struct irq_info *info_for_irq(unsigned irq); unsigned cpu_from_irq(unsigned irq); unsigned cpu_from_evtchn(unsigned int evtchn); +/* + * Do any ABI specific setup for a bound event channel before it can + * be unmasked and used. + */ +static inline int xen_evtchn_port_setup(struct irq_info *info) +{ + if (evtchn_ops->setup) + return evtchn_ops->setup(info); + return 0; +} + static inline void xen_evtchn_port_bind_to_cpu(struct irq_info *info, unsigned cpu) { -- 1.7.2.5