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 IO_APIC_route_entry;
28struct io_apic_irq_attr;
29struct irq_data;
30struct cpumask;
31struct pci_dev;
32struct msi_msg;
33
34extern int irq_remap_broken;
35extern int disable_sourceid_checking;
36extern int no_x2apic_optout;
37extern int irq_remapping_enabled;
38
39struct irq_remap_ops {
40	/* Initializes hardware and makes it ready for remapping interrupts */
41	int  (*prepare)(void);
42
43	/* Enables the remapping hardware */
44	int  (*enable)(void);
45
46	/* Disables the remapping hardware */
47	void (*disable)(void);
48
49	/* Reenables the remapping hardware */
50	int  (*reenable)(int);
51
52	/* Enable fault handling */
53	int  (*enable_faulting)(void);
54
55	/* IO-APIC setup routine */
56	int (*setup_ioapic_entry)(int irq, struct IO_APIC_route_entry *,
57				  unsigned int, int,
58				  struct io_apic_irq_attr *);
59
60	/* Set the CPU affinity of a remapped interrupt */
61	int (*set_affinity)(struct irq_data *data, const struct cpumask *mask,
62			    bool force);
63
64	/* Free an IRQ */
65	int (*free_irq)(int);
66
67	/* Create MSI msg to use for interrupt remapping */
68	void (*compose_msi_msg)(struct pci_dev *,
69				unsigned int, unsigned int,
70				struct msi_msg *, u8);
71
72	/* Allocate remapping resources for MSI */
73	int (*msi_alloc_irq)(struct pci_dev *, int, int);
74
75	/* Setup the remapped MSI irq */
76	int (*msi_setup_irq)(struct pci_dev *, unsigned int, int, int);
77
78	/* Setup interrupt remapping for an HPET MSI */
79	int (*alloc_hpet_msi)(unsigned int, unsigned int);
80};
81
82extern struct irq_remap_ops intel_irq_remap_ops;
83extern struct irq_remap_ops amd_iommu_irq_ops;
84
85#else  /* CONFIG_IRQ_REMAP */
86
87#define irq_remapping_enabled 0
88#define irq_remap_broken      0
89
90#endif /* CONFIG_IRQ_REMAP */
91
92#endif /* __IRQ_REMAPPING_H */
93