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authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2009-11-05 16:33:09 -0500
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2010-10-18 10:49:28 -0400
commitd9a8814f27080cec6126fca3ef0c210d9f56181e (patch)
tree5db169fb98d537413cea793298557343eaf69df1 /drivers/xen/events.c
parent3a69e9165a271b026c7149886b96ab0cc2e9a36b (diff)
xen: Provide a variant of xen_poll_irq with timeout.
The 'xen_poll_irq_timeout' provides a method to pass in the poll timeout for IRQs if requested. We also export those two poll functions as Xen PCI fronted uses them. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Diffstat (limited to 'drivers/xen/events.c')
-rw-r--r--drivers/xen/events.c17
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index bab5ac18fe0e..4e0f868517be 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -1139,7 +1139,7 @@ void xen_clear_irq_pending(int irq)
if (VALID_EVTCHN(evtchn))
clear_evtchn(evtchn);
}
-
+EXPORT_SYMBOL(xen_clear_irq_pending);
void xen_set_irq_pending(int irq)
{
int evtchn = evtchn_from_irq(irq);
@@ -1159,9 +1159,9 @@ bool xen_test_irq_pending(int irq)
return ret;
}
-/* Poll waiting for an irq to become pending. In the usual case, the
- irq will be disabled so it won't deliver an interrupt. */
-void xen_poll_irq(int irq)
+/* Poll waiting for an irq to become pending with timeout. In the usual case,
+ * the irq will be disabled so it won't deliver an interrupt. */
+void xen_poll_irq_timeout(int irq, u64 timeout)
{
evtchn_port_t evtchn = evtchn_from_irq(irq);
@@ -1169,13 +1169,20 @@ void xen_poll_irq(int irq)
struct sched_poll poll;
poll.nr_ports = 1;
- poll.timeout = 0;
+ poll.timeout = timeout;
set_xen_guest_handle(poll.ports, &evtchn);
if (HYPERVISOR_sched_op(SCHEDOP_poll, &poll) != 0)
BUG();
}
}
+EXPORT_SYMBOL(xen_poll_irq_timeout);
+/* Poll waiting for an irq to become pending. In the usual case, the
+ * irq will be disabled so it won't deliver an interrupt. */
+void xen_poll_irq(int irq)
+{
+ xen_poll_irq_timeout(irq, 0 /* no timeout */);
+}
void xen_irq_resume(void)
{