1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Chained IRQ handlers support.
4 *
5 * Copyright (C) 2011 ARM Ltd.
6 */
7#ifndef __IRQCHIP_CHAINED_IRQ_H
8#define __IRQCHIP_CHAINED_IRQ_H
9
10#include <linux/irq.h>
11
12/*
13 * Entry/exit functions for chained handlers where the primary IRQ chip
14 * may implement either fasteoi or level-trigger flow control.
15 */
16static inline void chained_irq_enter(struct irq_chip *chip,
17 struct irq_desc *desc)
18{
19 /* FastEOI controllers require no action on entry. */
20 if (chip->irq_eoi)
21 return;
22
23 if (chip->irq_mask_ack) {
24 chip->irq_mask_ack(&desc->irq_data);
25 } else {
26 chip->irq_mask(&desc->irq_data);
27 if (chip->irq_ack)
28 chip->irq_ack(&desc->irq_data);
29 }
30}
31
32static inline void chained_irq_exit(struct irq_chip *chip,
33 struct irq_desc *desc)
34{
35 if (chip->irq_eoi)
36 chip->irq_eoi(&desc->irq_data);
37 else
38 chip->irq_unmask(&desc->irq_data);
39}
40
41#endif /* __IRQCHIP_CHAINED_IRQ_H */
42