1/*
 2 * Copyright (C) 2012 Advanced Micro Devices, Inc.
 3 * Author: Joerg Roedel <joerg.roedel@amd.com>
 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 disable_irq_remap;
35extern int irq_remap_broken;
36extern int disable_sourceid_checking;
37extern int no_x2apic_optout;
38extern int irq_remapping_enabled;
39
40struct irq_remap_ops {
41	/* Check whether Interrupt Remapping is supported */
42	int (*supported)(void);
43
44	/* Initializes hardware and makes it ready for remapping interrupts */
45	int  (*prepare)(void);
46
47	/* Enables the remapping hardware */
48	int  (*enable)(void);
49
50	/* Disables the remapping hardware */
51	void (*disable)(void);
52
53	/* Reenables the remapping hardware */
54	int  (*reenable)(int);
55
56	/* Enable fault handling */
57	int  (*enable_faulting)(void);
58
59	/* IO-APIC setup routine */
60	int (*setup_ioapic_entry)(int irq, struct IO_APIC_route_entry *,
61				  unsigned int, int,
62				  struct io_apic_irq_attr *);
63
64	/* Set the CPU affinity of a remapped interrupt */
65	int (*set_affinity)(struct irq_data *data, const struct cpumask *mask,
66			    bool force);
67
68	/* Free an IRQ */
69	int (*free_irq)(int);
70
71	/* Create MSI msg to use for interrupt remapping */
72	void (*compose_msi_msg)(struct pci_dev *,
73				unsigned int, unsigned int,
74				struct msi_msg *, u8);
75
76	/* Allocate remapping resources for MSI */
77	int (*msi_alloc_irq)(struct pci_dev *, int, int);
78
79	/* Setup the remapped MSI irq */
80	int (*msi_setup_irq)(struct pci_dev *, unsigned int, int, int);
81
82	/* Setup interrupt remapping for an HPET MSI */
83	int (*setup_hpet_msi)(unsigned int, unsigned int);
84};
85
86extern struct irq_remap_ops intel_irq_remap_ops;
87extern struct irq_remap_ops amd_iommu_irq_ops;
88
89#else  /* CONFIG_IRQ_REMAP */
90
91#define irq_remapping_enabled 0
92#define disable_irq_remap     1
93#define irq_remap_broken      0
94
95#endif /* CONFIG_IRQ_REMAP */
96
97#endif /* __IRQ_REMAPPING_H */