1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (C) 2012 Advanced Micro Devices, Inc.
4  * Author: Joerg Roedel <jroedel@suse.de>
5  *
6  * This header file contains stuff that is shared between different interrupt
7  * remapping drivers but with no need to be visible outside of the IOMMU layer.
8  */
9 
10 #ifndef __IRQ_REMAPPING_H
11 #define __IRQ_REMAPPING_H
12 
13 #ifdef CONFIG_IRQ_REMAP
14 
15 struct irq_data;
16 struct msi_msg;
17 struct irq_domain;
18 struct irq_alloc_info;
19 
20 extern int irq_remap_broken;
21 extern int disable_sourceid_checking;
22 extern int no_x2apic_optout;
23 extern int irq_remapping_enabled;
24 
25 extern int disable_irq_post;
26 
27 struct irq_remap_ops {
28 	/* The supported capabilities */
29 	int capability;
30 
31 	/* Initializes hardware and makes it ready for remapping interrupts */
32 	int  (*prepare)(void);
33 
34 	/* Enables the remapping hardware */
35 	int  (*enable)(void);
36 
37 	/* Disables the remapping hardware */
38 	void (*disable)(void);
39 
40 	/* Reenables the remapping hardware */
41 	int  (*reenable)(int);
42 
43 	/* Enable fault handling */
44 	int  (*enable_faulting)(void);
45 };
46 
47 extern struct irq_remap_ops intel_irq_remap_ops;
48 extern struct irq_remap_ops amd_iommu_irq_ops;
49 extern struct irq_remap_ops hyperv_irq_remap_ops;
50 
51 #else  /* CONFIG_IRQ_REMAP */
52 
53 #define irq_remapping_enabled 0
54 #define irq_remap_broken      0
55 #define disable_irq_post      1
56 
57 #endif /* CONFIG_IRQ_REMAP */
58 
59 #endif /* __IRQ_REMAPPING_H */
60