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/irqdomain.h>
26#include <asm/hw_irq.h>
27#include <asm/io_apic.h>
28
29struct msi_msg;
30struct irq_alloc_info;
31
32enum irq_remap_cap {
33 IRQ_POSTING_CAP = 0,
34};
35
36enum {
37 IRQ_REMAP_XAPIC_MODE,
38 IRQ_REMAP_X2APIC_MODE,
39};
40
41struct vcpu_data {
42 u64 pi_desc_addr; /* Physical address of PI Descriptor */
43 u32 vector; /* Guest vector of the interrupt */
44};
45
46#ifdef CONFIG_IRQ_REMAP
47
48extern raw_spinlock_t irq_2_ir_lock;
49
50extern bool irq_remapping_cap(enum irq_remap_cap cap);
51extern void set_irq_remapping_broken(void);
52extern int irq_remapping_prepare(void);
53extern int irq_remapping_enable(void);
54extern void irq_remapping_disable(void);
55extern int irq_remapping_reenable(int);
56extern int irq_remap_enable_fault_handling(void);
57extern void panic_if_irq_remap(const char *msg);
58
59extern struct irq_domain *
60irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info);
61extern struct irq_domain *
62irq_remapping_get_irq_domain(struct irq_alloc_info *info);
63
64/* Create PCI MSI/MSIx irqdomain, use @parent as the parent irqdomain. */
65extern struct irq_domain *
66arch_create_remap_msi_irq_domain(struct irq_domain *par, const char *n, int id);
67
68/* Get parent irqdomain for interrupt remapping irqdomain */
69static inline struct irq_domain *arch_get_ir_parent_domain(void)
70{
71 return x86_vector_domain;
72}
73
74#else /* CONFIG_IRQ_REMAP */
75
76static inline bool irq_remapping_cap(enum irq_remap_cap cap) { return 0; }
77static inline void set_irq_remapping_broken(void) { }
78static inline int irq_remapping_prepare(void) { return -ENODEV; }
79static inline int irq_remapping_enable(void) { return -ENODEV; }
80static inline void irq_remapping_disable(void) { }
81static inline int irq_remapping_reenable(int eim) { return -ENODEV; }
82static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; }
83
84static inline void panic_if_irq_remap(const char *msg)
85{
86}
87
88static inline struct irq_domain *
89irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info)
90{
91 return NULL;
92}
93
94static inline struct irq_domain *
95irq_remapping_get_irq_domain(struct irq_alloc_info *info)
96{
97 return NULL;
98}
99
100#endif /* CONFIG_IRQ_REMAP */
101#endif /* __X86_IRQ_REMAPPING_H */
102