Introduce callback irq_chip.irq_write_msi_msg, so we could share common
code among MSI alike interrupt controllers, such as HPET and DMAR.
Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
---
include/linux/irq.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 041edd6dc409..99aea9925b21 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -326,6 +326,7 @@ static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d)
* @irq_release_resources: optional to release resources acquired with
* irq_request_resources
* @irq_compose_msi_msg: optional to compose message content for MSI
+ * @irq_write_msi_msg: optional to write message content for MSI
* @flags: chip specific flags
*/
struct irq_chip {
@@ -363,6 +364,7 @@ struct irq_chip {
void (*irq_release_resources)(struct irq_data *data);
void (*irq_compose_msi_msg)(struct irq_data *data, struct msi_msg *msg);
+ void (*irq_write_msi_msg)(struct irq_data *data, struct msi_msg *msg);
unsigned long flags;
};
@@ -457,6 +459,12 @@ extern void irq_chip_ack_parent(struct irq_data *data);
extern int irq_chip_retrigger_hierarchy(struct irq_data *data);
#endif
+static inline void irq_chip_write_msi_msg(struct irq_data *data,
+ struct msi_msg *msg)
+{
+ data->chip->irq_write_msi_msg(data, msg);
+}
+
/* Handling of unhandled and spurious interrupts: */
extern void note_interrupt(unsigned int irq, struct irq_desc *desc,
irqreturn_t action_ret);
--
1.7.10.4
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