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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: Jiang 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: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Jiang Liu 2014-11-09 23:10:28 +08:00 committed by Thomas Gleixner
parent f86eff222f
commit 9dde55b72d
1 changed files with 8 additions and 0 deletions
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8
include/linux/irq.h
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@ -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);