1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_X86_HW_IRQ_H
3#define _ASM_X86_HW_IRQ_H
4
5/*
6 * (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
7 *
8 * moved some of the old arch/i386/kernel/irq.h to here. VY
9 *
10 * IRQ/IPI changes taken from work by Thomas Radke
11 * <tomsoft@informatik.tu-chemnitz.de>
12 *
13 * hacked by Andi Kleen for x86-64.
14 * unified by tglx
15 */
16
17#include <asm/irq_vectors.h>
18
19#ifndef __ASSEMBLY__
20
21#include <linux/percpu.h>
22#include <linux/profile.h>
23#include <linux/smp.h>
24
25#include <linux/atomic.h>
26#include <asm/irq.h>
27#include <asm/sections.h>
28
29#ifdef	CONFIG_IRQ_DOMAIN_HIERARCHY
30struct irq_data;
31struct pci_dev;
32struct msi_desc;
33
34enum irq_alloc_type {
35	X86_IRQ_ALLOC_TYPE_IOAPIC = 1,
36	X86_IRQ_ALLOC_TYPE_HPET,
37	X86_IRQ_ALLOC_TYPE_PCI_MSI,
38	X86_IRQ_ALLOC_TYPE_PCI_MSIX,
39	X86_IRQ_ALLOC_TYPE_DMAR,
40	X86_IRQ_ALLOC_TYPE_AMDVI,
41	X86_IRQ_ALLOC_TYPE_UV,
42};
43
44struct ioapic_alloc_info {
45	int		pin;
46	int		node;
47	u32		is_level	: 1;
48	u32		active_low	: 1;
49	u32		valid		: 1;
50};
51
52struct uv_alloc_info {
53	int		limit;
54	int		blade;
55	unsigned long	offset;
56	char		*name;
57
58};
59
60/**
61 * irq_alloc_info - X86 specific interrupt allocation info
62 * @type:	X86 specific allocation type
63 * @flags:	Flags for allocation tweaks
64 * @devid:	Device ID for allocations
65 * @hwirq:	Associated hw interrupt number in the domain
66 * @mask:	CPU mask for vector allocation
67 * @desc:	Pointer to msi descriptor
68 * @data:	Allocation specific data
69 *
70 * @ioapic:	IOAPIC specific allocation data
71 * @uv:		UV specific allocation data
72*/
73struct irq_alloc_info {
74	enum irq_alloc_type	type;
75	u32			flags;
76	u32			devid;
77	irq_hw_number_t		hwirq;
78	const struct cpumask	*mask;
79	struct msi_desc		*desc;
80	void			*data;
81
82	union {
83		struct ioapic_alloc_info	ioapic;
84		struct uv_alloc_info		uv;
85	};
86};
87
88struct irq_cfg {
89	unsigned int		dest_apicid;
90	unsigned int		vector;
91};
92
93extern struct irq_cfg *irq_cfg(unsigned int irq);
94extern struct irq_cfg *irqd_cfg(struct irq_data *irq_data);
95extern void lock_vector_lock(void);
96extern void unlock_vector_lock(void);
97#ifdef CONFIG_SMP
98extern void vector_schedule_cleanup(struct irq_cfg *);
99extern void irq_complete_move(struct irq_cfg *cfg);
100#else
101static inline void vector_schedule_cleanup(struct irq_cfg *c) { }
102static inline void irq_complete_move(struct irq_cfg *c) { }
103#endif
104
105extern void apic_ack_edge(struct irq_data *data);
106#else	/*  CONFIG_IRQ_DOMAIN_HIERARCHY */
107static inline void lock_vector_lock(void) {}
108static inline void unlock_vector_lock(void) {}
109#endif	/* CONFIG_IRQ_DOMAIN_HIERARCHY */
110
111/* Statistics */
112extern atomic_t irq_err_count;
113extern atomic_t irq_mis_count;
114
115extern void elcr_set_level_irq(unsigned int irq);
116
117extern char irq_entries_start[];
118#ifdef CONFIG_TRACING
119#define trace_irq_entries_start irq_entries_start
120#endif
121
122extern char spurious_entries_start[];
123
124#define VECTOR_UNUSED		NULL
125#define VECTOR_SHUTDOWN		((void *)-1L)
126#define VECTOR_RETRIGGERED	((void *)-2L)
127
128typedef struct irq_desc* vector_irq_t[NR_VECTORS];
129DECLARE_PER_CPU(vector_irq_t, vector_irq);
130
131#endif /* !ASSEMBLY_ */
132
133#endif /* _ASM_X86_HW_IRQ_H */
134