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Commit 9dde55b7 authored by Jiang Liu's avatar Jiang Liu Committed by Thomas Gleixner
Browse files

genirq: Introduce callback irq_chip.irq_write_msi_msg 



Introduce callback irq_chip.irq_write_msi_msg, so we can share common
code among MSI alike interrupt controllers, such as HPET and DMAR.

Signed-off-by: default avatarJiang Liu <jiang.liu@linux.intel.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Yingjoe Chen <yingjoe.chen@mediatek.com>
Cc: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent f86eff22

include/linux/irq.h

+8 −0
Original line number Diff line number Diff line
@@ -322,6 +322,7 @@ 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 {
@@ -359,6 +360,7 @@ 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;

};
@@ -459,6 +461,12 @@ extern int irq_chip_set_affinity_parent(struct irq_data *data, 
					bool force);

#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);