1 /* SPDX-License-Identifier: GPL-2.0-only */
2 #ifndef _POWERPC_SYSDEV_MSI_BITMAP_H
3 #define _POWERPC_SYSDEV_MSI_BITMAP_H
4 
5 /*
6  * Copyright 2008, Michael Ellerman, IBM Corporation.
7  */
8 
9 #include <linux/of.h>
10 #include <asm/irq.h>
11 
12 struct msi_bitmap {
13 	struct device_node	*of_node;
14 	unsigned long		*bitmap;
15 	spinlock_t		lock;
16 	unsigned int		irq_count;
17 	bool		 	bitmap_from_slab;
18 };
19 
20 int msi_bitmap_alloc_hwirqs(struct msi_bitmap *bmp, int num);
21 void msi_bitmap_free_hwirqs(struct msi_bitmap *bmp, unsigned int offset,
22 			    unsigned int num);
23 void msi_bitmap_reserve_hwirq(struct msi_bitmap *bmp, unsigned int hwirq);
24 
25 int msi_bitmap_reserve_dt_hwirqs(struct msi_bitmap *bmp);
26 
27 int msi_bitmap_alloc(struct msi_bitmap *bmp, unsigned int irq_count,
28 		     struct device_node *of_node);
29 void msi_bitmap_free(struct msi_bitmap *bmp);
30 
31 #endif /* _POWERPC_SYSDEV_MSI_BITMAP_H */
32