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  */
chained_irq_enter(struct irq_chip * chip,struct irq_desc * desc)16 static 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 
chained_irq_exit(struct irq_chip * chip,struct irq_desc * desc)32 static 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