Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
drivers/xen/events.c | 104 +++++++++++++++++++++++++++++++------------------
1 files changed, 66 insertions(+), 38 deletions(-)
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 2dffa43..72725fa 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -118,46 +118,76 @@ static struct irq_chip xen_dynamic_chip;
static struct irq_chip xen_percpu_chip;
static struct irq_chip xen_pirq_chip;
-/* Constructor for packed IRQ information. */
-static struct irq_info mk_unbound_info(void)
+/* Get info for IRQ */
+static struct irq_info *info_for_irq(unsigned irq)
{
- return (struct irq_info) { .type = IRQT_UNBOUND };
+ return &irq_info[irq];
}
-static struct irq_info mk_evtchn_info(unsigned short evtchn)
+/* Constructors for packed IRQ information. */
+static void xen_irq_info_common_init(struct irq_info *info,
+ enum xen_irq_type type,
+ unsigned short evtchn,
+ unsigned short cpu)
{
- return (struct irq_info) { .type = IRQT_EVTCHN, .evtchn = evtchn,
- .cpu = 0 };
+
+ BUG_ON(info->type != IRQT_UNBOUND && info->type != type);
+
+ info->type = type;
+ info->evtchn = evtchn;
+ info->cpu = cpu;
}
-static struct irq_info mk_ipi_info(unsigned short evtchn, enum ipi_vector ipi)
+static void xen_irq_info_evtchn_init(unsigned irq,
+ unsigned short evtchn)
{
- return (struct irq_info) { .type = IRQT_IPI, .evtchn = evtchn,
- .cpu = 0, .u.ipi = ipi };
+ struct irq_info *info = info_for_irq(irq);
+
+ xen_irq_info_common_init(info, IRQT_EVTCHN, evtchn, 0);
}
-static struct irq_info mk_virq_info(unsigned short evtchn, unsigned short virq)
+static void xen_irq_info_ipi_init(unsigned irq,
+ unsigned short evtchn,
+ enum ipi_vector ipi)
{
- return (struct irq_info) { .type = IRQT_VIRQ, .evtchn = evtchn,
- .cpu = 0, .u.virq = virq };
+ struct irq_info *info = info_for_irq(irq);
+
+ xen_irq_info_common_init(info, IRQT_IPI, evtchn, 0);
+
+ info->u.ipi = ipi;
}
-static struct irq_info mk_pirq_info(unsigned short evtchn, unsigned short pirq,
- unsigned short gsi, unsigned short vector)
+static void xen_irq_info_virq_init(unsigned irq,
+ unsigned short evtchn,
+ unsigned short virq)
{
- return (struct irq_info) { .type = IRQT_PIRQ, .evtchn = evtchn,
- .cpu = 0,
- .u.pirq = { .pirq = pirq, .gsi = gsi, .vector = vector
} };
+ struct irq_info *info = info_for_irq(irq);
+
+ xen_irq_info_common_init(info, IRQT_VIRQ, evtchn, 0);
+
+ info->u.virq = virq;
}
-/*
- * Accessors for packed IRQ information.
- */
-static struct irq_info *info_for_irq(unsigned irq)
+static void xen_irq_info_pirq_init(unsigned irq,
+ unsigned short evtchn,
+ unsigned short pirq,
+ unsigned short gsi,
+ unsigned short vector,
+ unsigned char flags)
{
- return &irq_info[irq];
+ struct irq_info *info = info_for_irq(irq);
+
+ xen_irq_info_common_init(info, IRQT_PIRQ, evtchn, 0);
+
+ info->u.pirq.pirq = pirq;
+ info->u.pirq.gsi = gsi;
+ info->u.pirq.vector = vector;
+ info->u.pirq.flags = flags;
}
+/*
+ * Accessors for packed IRQ information.
+ */
static unsigned int evtchn_from_irq(unsigned irq)
{
if (unlikely(WARN(irq < 0 || irq >= nr_irqs, "Invalid irq %d!\n", irq)))
@@ -414,6 +444,8 @@ static int xen_allocate_irq_gsi(unsigned gsi)
static void xen_free_irq(unsigned irq)
{
+ irq_info[irq].type = IRQT_UNBOUND;
+
/* Legacy IRQ descriptors are managed by the arch. */
if (irq < NR_IRQS_LEGACY)
return;
@@ -610,8 +642,8 @@ int xen_bind_pirq_gsi_to_irq(unsigned gsi,
goto out;
}
- irq_info[irq] = mk_pirq_info(0, pirq, gsi, irq_op.vector);
- irq_info[irq].u.pirq.flags |= shareable ? PIRQ_SHAREABLE : 0;
+ xen_irq_info_pirq_init(irq, 0, pirq, gsi, irq_op.vector,
+ shareable ? PIRQ_SHAREABLE : 0);
pirq_to_irq[pirq] = irq;
out:
@@ -649,7 +681,7 @@ int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct
msi_desc *msidesc,
set_irq_chip_and_handler_name(irq, &xen_pirq_chip,
handle_level_irq, name);
- irq_info[irq] = mk_pirq_info(0, pirq, 0, vector);
+ xen_irq_info_pirq_init(irq, 0, pirq, 0, vector, 0);
pirq_to_irq[pirq] = irq;
ret = set_irq_msi(irq, msidesc);
if (ret < 0)
@@ -688,8 +720,6 @@ int xen_destroy_irq(int irq)
}
pirq_to_irq[info->u.pirq.pirq] = -1;
- irq_info[irq] = mk_unbound_info();
-
xen_free_irq(irq);
out:
@@ -717,7 +747,7 @@ int bind_evtchn_to_irq(unsigned int evtchn)
handle_fasteoi_irq, "event");
evtchn_to_irq[evtchn] = irq;
- irq_info[irq] = mk_evtchn_info(evtchn);
+ xen_irq_info_evtchn_init(irq, evtchn);
}
spin_unlock(&irq_mapping_update_lock);
@@ -750,7 +780,7 @@ static int bind_ipi_to_irq(unsigned int ipi, unsigned int
cpu)
evtchn = bind_ipi.port;
evtchn_to_irq[evtchn] = irq;
- irq_info[irq] = mk_ipi_info(evtchn, ipi);
+ xen_irq_info_ipi_init(irq, evtchn, ipi);
per_cpu(ipi_to_irq, cpu)[ipi] = irq;
bind_evtchn_to_cpu(evtchn, cpu);
@@ -785,7 +815,7 @@ int bind_virq_to_irq(unsigned int virq, unsigned int cpu)
evtchn = bind_virq.port;
evtchn_to_irq[evtchn] = irq;
- irq_info[irq] = mk_virq_info(evtchn, virq);
+ xen_irq_info_virq_init(irq, evtchn, virq);
per_cpu(virq_to_irq, cpu)[virq] = irq;
@@ -828,11 +858,9 @@ static void unbind_from_irq(unsigned int irq)
evtchn_to_irq[evtchn] = -1;
}
- if (irq_info[irq].type != IRQT_UNBOUND) {
- irq_info[irq] = mk_unbound_info();
+ BUG_ON(irq_info[irq].type == IRQT_UNBOUND);
- xen_free_irq(irq);
- }
+ xen_free_irq(irq);
spin_unlock(&irq_mapping_update_lock);
}
@@ -1093,7 +1121,7 @@ void rebind_evtchn_irq(int evtchn, int irq)
BUG_ON(info->type == IRQT_UNBOUND);
evtchn_to_irq[evtchn] = irq;
- irq_info[irq] = mk_evtchn_info(evtchn);
+ xen_irq_info_evtchn_init(irq, evtchn);
spin_unlock(&irq_mapping_update_lock);
@@ -1229,7 +1257,7 @@ static void restore_pirqs(void)
if (rc) {
printk(KERN_WARNING "xen map irq failed gsi=%d irq=%d
pirq=%d rc=%d\n",
gsi, irq, pirq, rc);
- irq_info[irq] = mk_unbound_info();
+ xen_free_irq(irq);
pirq_to_irq[pirq] = -1;
continue;
}
@@ -1261,7 +1289,7 @@ static void restore_cpu_virqs(unsigned int cpu)
/* Record the new mapping. */
evtchn_to_irq[evtchn] = irq;
- irq_info[irq] = mk_virq_info(evtchn, virq);
+ xen_irq_info_virq_init(irq, evtchn, virq);
bind_evtchn_to_cpu(evtchn, cpu);
}
}
@@ -1286,7 +1314,7 @@ static void restore_cpu_ipis(unsigned int cpu)
/* Record the new mapping. */
evtchn_to_irq[evtchn] = irq;
- irq_info[irq] = mk_ipi_info(evtchn, ipi);
+ xen_irq_info_ipi_init(irq, evtchn, ipi);
bind_evtchn_to_cpu(evtchn, cpu);
}
}
--
1.5.6.5
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