genirq: Add more helper functions to support stacked irq_chip

Add more helper function for stacked irq_chip to just call parent's
function.

Signed-off-by: Yingjoe Chen <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Pawel Moll <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Matthias Brugger <[email protected]>
Cc: Russell King <[email protected]>
Cc: Jason Cooper <[email protected]>
Cc: Gran Likely <[email protected]>
Cc: Boris BREZILLON <[email protected]>
Cc: <[email protected]>
Cc: Bjorn Helgaas <[email protected]>
Cc: Yijing Wang <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Cc: Sascha Hauer <[email protected]>
Cc: Jiang Liu <[email protected]>
Cc: Marc Zyngier <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>

2 files changed, 54 insertions, 0 deletions

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 0adcbbbf2e87..fad4bf6f15f6 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -446,6 +446,12 @@ extern void handle_nested_irq(unsigned int irq);
 #ifdef	CONFIG_IRQ_DOMAIN_HIERARCHY
 extern void irq_chip_ack_parent(struct irq_data *data);
 extern int irq_chip_retrigger_hierarchy(struct irq_data *data);
+extern void irq_chip_mask_parent(struct irq_data *data);
+extern void irq_chip_unmask_parent(struct irq_data *data);
+extern void irq_chip_eoi_parent(struct irq_data *data);
+extern int irq_chip_set_affinity_parent(struct irq_data *data,
+					const struct cpumask *dest,
+					bool force);
 #endif
 
 /* Handling of unhandled and spurious interrupts: */
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index dd1d3c4c93a2..47f4c6469a43 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -863,6 +863,54 @@ void irq_chip_ack_parent(struct irq_data *data)
 }
 
 /**
+ * irq_chip_mask_parent - Mask the parent interrupt
+ * @data:	Pointer to interrupt specific data
+ */
+void irq_chip_mask_parent(struct irq_data *data)
+{
+	data = data->parent_data;
+	data->chip->irq_mask(data);
+}
+
+/**
+ * irq_chip_unmask_parent - Unmask the parent interrupt
+ * @data:	Pointer to interrupt specific data
+ */
+void irq_chip_unmask_parent(struct irq_data *data)
+{
+	data = data->parent_data;
+	data->chip->irq_unmask(data);
+}
+
+/**
+ * irq_chip_eoi_parent - Invoke EOI on the parent interrupt
+ * @data:	Pointer to interrupt specific data
+ */
+void irq_chip_eoi_parent(struct irq_data *data)
+{
+	data = data->parent_data;
+	data->chip->irq_eoi(data);
+}
+
+/**
+ * irq_chip_set_affinity_parent - Set affinity on the parent interrupt
+ * @data:	Pointer to interrupt specific data
+ * @dest:	The affinity mask to set
+ * @force:	Flag to enforce setting (disable online checks)
+ *
+ * Conditinal, as the underlying parent chip might not implement it.
+ */
+int irq_chip_set_affinity_parent(struct irq_data *data,
+				 const struct cpumask *dest, bool force)
+{
+	data = data->parent_data;
+	if (data->chip->irq_set_affinity)
+		return data->chip->irq_set_affinity(data, dest, force);
+
+	return -ENOSYS;
+}
+
+/**
  * irq_chip_retrigger_hierarchy - Retrigger an interrupt in hardware
  * @data:	Pointer to interrupt specific data
  *