1/*
 2 * Copyright (C) 2012 Advanced Micro Devices, Inc.
 3 * Author: Joerg Roedel <jroedel@suse.de>
 4 *
 5 * This program is free software; you can redistribute it and/or modify it
 6 * under the terms of the GNU General Public License version 2 as published
 7 * by the Free Software Foundation.
 8 *
 9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
17 *
18 * This header file contains stuff that is shared between different interrupt
19 * remapping drivers but with no need to be visible outside of the IOMMU layer.
20 */
21
22#ifndef __IRQ_REMAPPING_H
23#define __IRQ_REMAPPING_H
24
25#ifdef CONFIG_IRQ_REMAP
26
27struct irq_data;
28struct msi_msg;
29struct irq_domain;
30struct irq_alloc_info;
31
32extern int irq_remap_broken;
33extern int disable_sourceid_checking;
34extern int no_x2apic_optout;
35extern int irq_remapping_enabled;
36
37extern int disable_irq_post;
38
39struct irq_remap_ops {
40	/* The supported capabilities */
41	int capability;
42
43	/* Initializes hardware and makes it ready for remapping interrupts */
44	int  (*prepare)(void);
45
46	/* Enables the remapping hardware */
47	int  (*enable)(void);
48
49	/* Disables the remapping hardware */
50	void (*disable)(void);
51
52	/* Reenables the remapping hardware */
53	int  (*reenable)(int);
54
55	/* Enable fault handling */
56	int  (*enable_faulting)(void);
57
58	/* Get the irqdomain associated the IOMMU device */
59	struct irq_domain *(*get_ir_irq_domain)(struct irq_alloc_info *);
60
61	/* Get the MSI irqdomain associated with the IOMMU device */
62	struct irq_domain *(*get_irq_domain)(struct irq_alloc_info *);
63};
64
65extern struct irq_remap_ops intel_irq_remap_ops;
66extern struct irq_remap_ops amd_iommu_irq_ops;
67
68extern void ir_ack_apic_edge(struct irq_data *data);
69
70#else  /* CONFIG_IRQ_REMAP */
71
72#define irq_remapping_enabled 0
73#define irq_remap_broken      0
74#define disable_irq_post      1
75
76#endif /* CONFIG_IRQ_REMAP */
77
78#endif /* __IRQ_REMAPPING_H */