xen/events: Refactor evtchn_to_irq array to be dynamically allocated

[profile/ivi/kernel-x86-ivi.git] / drivers / xen / events / events_internal.h

diff --git a/drivers/xen/events/events_internal.h b/drivers/xen/events/events_internal.h
index dc96502..a3d9aec 100644 (file)
--- a/drivers/xen/events/events_internal.h
+++ b/drivers/xen/events/events_internal.h
@@ -35,7 +35,7 @@ struct irq_info {
        int refcnt;
        enum xen_irq_type type; /* type */
        unsigned irq;
-       unsigned short evtchn;  /* event channel */
+       unsigned int evtchn;    /* event channel */
        unsigned short cpu;     /* cpu bound */
 
        union {
@@ -55,6 +55,9 @@ struct irq_info {
 #define PIRQ_SHAREABLE (1 << 1)
 
 struct evtchn_ops {
+       unsigned (*max_channels)(void);
+       unsigned (*nr_channels)(void);
+
        int (*setup)(struct irq_info *info);
        void (*bind_to_cpu)(struct irq_info *info, unsigned cpu);
 
@@ -70,12 +73,23 @@ struct evtchn_ops {
 
 extern const struct evtchn_ops *evtchn_ops;
 
-extern int *evtchn_to_irq;
+extern int **evtchn_to_irq;
+int get_evtchn_to_irq(unsigned int evtchn);
 
 struct irq_info *info_for_irq(unsigned irq);
 unsigned cpu_from_irq(unsigned irq);
 unsigned cpu_from_evtchn(unsigned int evtchn);
 
+static inline unsigned xen_evtchn_max_channels(void)
+{
+       return evtchn_ops->max_channels();
+}
+
+static inline unsigned xen_evtchn_nr_channels(void)
+{
+       return evtchn_ops->nr_channels();
+}
+
 /*
  * Do any ABI specific setup for a bound event channel before it can
  * be unmasked and used.