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genirq: Introduce irq_chip.irq_compose_msi_msg() to support stacked irqchip

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Add callback irq_compose_msi_msg to struct irq_chip, which will be used
to support stacked irqchip.

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
2014-11-23 13:01:46 +01:00
committed by Thomas Gleixner
parent 56e8abab61
commit 515085ef7e
2 changed files with 31 additions and 0 deletions
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include/linux/irq.h
+5
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@@ -29,6 +29,7 @@ struct seq_file;
struct module;
struct irq_desc;
struct irq_data;
struct msi_msg;
typedef void (*irq_flow_handler_t)(unsigned int irq,
struct irq_desc *desc);
typedef void (*irq_preflow_handler_t)(struct irq_data *data);
@@ -320,6 +321,7 @@ static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d)
* any other callback related to this irq
* @irq_release_resources: optional to release resources acquired with
* irq_request_resources
* @irq_compose_msi_msg: optional to compose message content for MSI
* @flags: chip specific flags
*/
struct irq_chip {
@@ -356,6 +358,8 @@ struct irq_chip {
int (*irq_request_resources)(struct irq_data *data);
void (*irq_release_resources)(struct irq_data *data);
void (*irq_compose_msi_msg)(struct irq_data *data, struct msi_msg *msg);
unsigned long flags;
};
@@ -443,6 +447,7 @@ extern void handle_percpu_devid_irq(unsigned int irq, struct irq_desc *desc);
extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc);
extern void handle_nested_irq(unsigned int irq);
extern int irq_chip_compose_msi_msg(struct irq_data *data, struct msi_msg *msg);
#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);