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 the interface of the interrupt remapping code to
19 * the x86 interrupt management code.
20 */
21
22#ifndef __X86_IRQ_REMAPPING_H
23#define __X86_IRQ_REMAPPING_H
24
25#include <asm/io_apic.h>
26
27struct IO_APIC_route_entry;
28struct io_apic_irq_attr;
29struct irq_chip;
30struct msi_msg;
31struct pci_dev;
32struct irq_cfg;
33
34#ifdef CONFIG_IRQ_REMAP
35
36extern void set_irq_remapping_broken(void);
37extern int irq_remapping_prepare(void);
38extern int irq_remapping_enable(void);
39extern void irq_remapping_disable(void);
40extern int irq_remapping_reenable(int);
41extern int irq_remap_enable_fault_handling(void);
42extern int setup_ioapic_remapped_entry(int irq,
43				       struct IO_APIC_route_entry *entry,
44				       unsigned int destination,
45				       int vector,
46				       struct io_apic_irq_attr *attr);
47extern void free_remapped_irq(int irq);
48extern void compose_remapped_msi_msg(struct pci_dev *pdev,
49				     unsigned int irq, unsigned int dest,
50				     struct msi_msg *msg, u8 hpet_id);
51extern int setup_hpet_msi_remapped(unsigned int irq, unsigned int id);
52extern void panic_if_irq_remap(const char *msg);
53extern bool setup_remapped_irq(int irq,
54			       struct irq_cfg *cfg,
55			       struct irq_chip *chip);
56
57void irq_remap_modify_chip_defaults(struct irq_chip *chip);
58
59#else  /* CONFIG_IRQ_REMAP */
60
61static inline void set_irq_remapping_broken(void) { }
62static inline int irq_remapping_prepare(void) { return -ENODEV; }
63static inline int irq_remapping_enable(void) { return -ENODEV; }
64static inline void irq_remapping_disable(void) { }
65static inline int irq_remapping_reenable(int eim) { return -ENODEV; }
66static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; }
67static inline int setup_ioapic_remapped_entry(int irq,
68					      struct IO_APIC_route_entry *entry,
69					      unsigned int destination,
70					      int vector,
71					      struct io_apic_irq_attr *attr)
72{
73	return -ENODEV;
74}
75static inline void free_remapped_irq(int irq) { }
76static inline void compose_remapped_msi_msg(struct pci_dev *pdev,
77					    unsigned int irq, unsigned int dest,
78					    struct msi_msg *msg, u8 hpet_id)
79{
80}
81static inline int setup_hpet_msi_remapped(unsigned int irq, unsigned int id)
82{
83	return -ENODEV;
84}
85
86static inline void panic_if_irq_remap(const char *msg)
87{
88}
89
90static inline void irq_remap_modify_chip_defaults(struct irq_chip *chip)
91{
92}
93
94static inline bool setup_remapped_irq(int irq,
95				      struct irq_cfg *cfg,
96				      struct irq_chip *chip)
97{
98	return false;
99}
100#endif /* CONFIG_IRQ_REMAP */
101
102#define dmar_alloc_hwirq()	irq_alloc_hwirq(-1)
103#define dmar_free_hwirq		irq_free_hwirq
104
105#endif /* __X86_IRQ_REMAPPING_H */
106