summaryrefslogtreecommitdiffstats
path: root/arch/x86/include/asm/hw_irq.h
blob: 6615032e19c80b79f3cd023ee291c790bcb07ae2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
#ifndef _ASM_X86_HW_IRQ_H
#define _ASM_X86_HW_IRQ_H

/*
 * (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
 *
 * moved some of the old arch/i386/kernel/irq.h to here. VY
 *
 * IRQ/IPI changes taken from work by Thomas Radke
 * <tomsoft@informatik.tu-chemnitz.de>
 *
 * hacked by Andi Kleen for x86-64.
 * unified by tglx
 */

#include <asm/irq_vectors.h>

#ifndef __ASSEMBLY__

#include <linux/percpu.h>
#include <linux/profile.h>
#include <linux/smp.h>

#include <linux/atomic.h>
#include <asm/irq.h>
#include <asm/sections.h>

/* Interrupt handlers registered during init_IRQ */
extern asmlinkage void apic_timer_interrupt(void);
extern asmlinkage void x86_platform_ipi(void);
extern asmlinkage void kvm_posted_intr_ipi(void);
extern asmlinkage void kvm_posted_intr_wakeup_ipi(void);
extern asmlinkage void error_interrupt(void);
extern asmlinkage void irq_work_interrupt(void);

extern asmlinkage void spurious_interrupt(void);
extern asmlinkage void thermal_interrupt(void);
extern asmlinkage void reschedule_interrupt(void);

extern asmlinkage void irq_move_cleanup_interrupt(void);
extern asmlinkage void reboot_interrupt(void);
extern asmlinkage void threshold_interrupt(void);
extern asmlinkage void deferred_error_interrupt(void);

extern asmlinkage void call_function_interrupt(void);
extern asmlinkage void call_function_single_interrupt(void);

#ifdef CONFIG_TRACING
/* Interrupt handlers registered during init_IRQ */
extern void trace_apic_timer_interrupt(void);
extern void trace_x86_platform_ipi(void);
extern void trace_error_interrupt(void);
extern void trace_irq_work_interrupt(void);
extern void trace_spurious_interrupt(void);
extern void trace_thermal_interrupt(void);
extern void trace_reschedule_interrupt(void);
extern void trace_threshold_interrupt(void);
extern void trace_deferred_error_interrupt(void);
extern void trace_call_function_interrupt(void);
extern void trace_call_function_single_interrupt(void);
#define trace_irq_move_cleanup_interrupt  irq_move_cleanup_interrupt
#define trace_reboot_interrupt  reboot_interrupt
#define trace_kvm_posted_intr_ipi kvm_posted_intr_ipi
#define trace_kvm_posted_intr_wakeup_ipi kvm_posted_intr_wakeup_ipi
#endif /* CONFIG_TRACING */

#ifdef	CONFIG_X86_LOCAL_APIC
struct irq_data;
struct pci_dev;
struct msi_desc;

enum irq_alloc_type {
	X86_IRQ_ALLOC_TYPE_IOAPIC = 1,
	X86_IRQ_ALLOC_TYPE_HPET,
	X86_IRQ_ALLOC_TYPE_MSI,
	X86_IRQ_ALLOC_TYPE_MSIX,
	X86_IRQ_ALLOC_TYPE_DMAR,
	X86_IRQ_ALLOC_TYPE_UV,
};

struct irq_alloc_info {
	enum irq_alloc_type	type;
	u32			flags;
	const struct cpumask	*mask;	/* CPU mask for vector allocation */
	union {
		int		unused;
#ifdef	CONFIG_HPET_TIMER
		struct {
			int		hpet_id;
			int		hpet_index;
			void		*hpet_data;
		};
#endif
#ifdef	CONFIG_PCI_MSI
		struct {
			struct pci_dev	*msi_dev;
			irq_hw_number_t	msi_hwirq;
		};
#endif
#ifdef	CONFIG_X86_IO_APIC
		struct {
			int		ioapic_id;
			int		ioapic_pin;
			int		ioapic_node;
			u32		ioapic_trigger : 1;
			u32		ioapic_polarity : 1;
			u32		ioapic_valid : 1;
			struct IO_APIC_route_entry *ioapic_entry;
		};
#endif
#ifdef	CONFIG_DMAR_TABLE
		struct {
			int		dmar_id;
			void		*dmar_data;
		};
#endif
#ifdef	CONFIG_HT_IRQ
		struct {
			int		ht_pos;
			int		ht_idx;
			struct pci_dev	*ht_dev;
			void		*ht_update;
		};
#endif
#ifdef	CONFIG_X86_UV
		struct {
			int		uv_limit;
			int		uv_blade;
			unsigned long	uv_offset;
			char		*uv_name;
		};
#endif
	};
};

struct irq_cfg {
	unsigned int		dest_apicid;
	u8			vector;
};

extern struct irq_cfg *irq_cfg(unsigned int irq);
extern struct irq_cfg *irqd_cfg(struct irq_data *irq_data);
extern void lock_vector_lock(void);
extern void unlock_vector_lock(void);
extern void setup_vector_irq(int cpu);
#ifdef CONFIG_SMP
extern void send_cleanup_vector(struct irq_cfg *);
extern void irq_complete_move(struct irq_cfg *cfg);
#else
static inline void send_cleanup_vector(struct irq_cfg *c) { }
static inline void irq_complete_move(struct irq_cfg *c) { }
#endif

extern void apic_ack_edge(struct irq_data *data);
#else	/*  CONFIG_X86_LOCAL_APIC */
static inline void lock_vector_lock(void) {}
static inline void unlock_vector_lock(void) {}
#endif	/* CONFIG_X86_LOCAL_APIC */

/* Statistics */
extern atomic_t irq_err_count;
extern atomic_t irq_mis_count;

extern void elcr_set_level_irq(unsigned int irq);

/* SMP */
extern __visible void smp_apic_timer_interrupt(struct pt_regs *);
extern __visible void smp_spurious_interrupt(struct pt_regs *);
extern __visible void smp_x86_platform_ipi(struct pt_regs *);
extern __visible void smp_error_interrupt(struct pt_regs *);
#ifdef CONFIG_X86_IO_APIC
extern asmlinkage void smp_irq_move_cleanup_interrupt(void);
#endif
#ifdef CONFIG_SMP
extern __visible void smp_reschedule_interrupt(struct pt_regs *);
extern __visible void smp_call_function_interrupt(struct pt_regs *);
extern __visible void smp_call_function_single_interrupt(struct pt_regs *);
#endif

extern char irq_entries_start[];
#ifdef CONFIG_TRACING
#define trace_irq_entries_start irq_entries_start
#endif

#define VECTOR_UNDEFINED	(-1)
#define VECTOR_RETRIGGERED	(-2)

typedef int vector_irq_t[NR_VECTORS];
DECLARE_PER_CPU(vector_irq_t, vector_irq);

#endif /* !ASSEMBLY_ */

#endif /* _ASM_X86_HW_IRQ_H */
OpenPOWER on IntegriCloud