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Subject[PATCH v3 02/13] genirq: Define ack_irq() and eoi_irq() helpers
Date
The newly-added IRQCHIP_AUTOMASKS_FLOW flag requires some additional
bookkeeping around chip->{irq_ack, irq_eoi}() calls. Define wrappers around
those chip callbacks to drive the IRQD_IRQ_FLOW_MASKED state of an IRQ when
the chip has the IRQCHIP_AUTOMASKS_FLOW flag.

Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
---
kernel/irq/chip.c | 16 ++++++++++++++++
kernel/irq/internals.h | 2 ++
2 files changed, 18 insertions(+)

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 21a21baa1366..793dbd8307b9 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -408,6 +408,22 @@ void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu)
cpumask_clear_cpu(cpu, desc->percpu_enabled);
}

+void ack_irq(struct irq_desc *desc)
+{
+ desc->irq_data.chip->irq_ack(&desc->irq_data);
+
+ if (desc->irq_data.chip->flags & IRQCHIP_AUTOMASKS_FLOW)
+ irq_state_set_flow_masked(desc);
+}
+
+void eoi_irq(struct irq_desc *desc)
+{
+ desc->irq_data.chip->irq_eoi(&desc->irq_data);
+
+ if (desc->irq_data.chip->flags & IRQCHIP_AUTOMASKS_FLOW)
+ irq_state_clr_flow_masked(desc);
+}
+
static inline void mask_ack_irq(struct irq_desc *desc)
{
if (desc->irq_data.chip->irq_mask_ack) {
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index b6c1cceddec0..6d6a621dc74c 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -87,6 +87,8 @@ extern void irq_enable(struct irq_desc *desc);
extern void irq_disable(struct irq_desc *desc);
extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu);
extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu);
+extern void ack_irq(struct irq_desc *desc);
+extern void eoi_irq(struct irq_desc *desc);
extern void mask_irq(struct irq_desc *desc);
extern void unmask_irq(struct irq_desc *desc);
extern void unmask_threaded_irq(struct irq_desc *desc);
--
2.25.1
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