xref: /openbmc/linux/arch/x86/include/asm/hw_irq.h (revision a539cc86)
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 #define IRQ_MATRIX_BITS		NR_VECTORS
20 
21 #ifndef __ASSEMBLY__
22 
23 #include <linux/percpu.h>
24 #include <linux/profile.h>
25 #include <linux/smp.h>
26 
27 #include <linux/atomic.h>
28 #include <asm/irq.h>
29 #include <asm/sections.h>
30 
31 #ifdef	CONFIG_X86_LOCAL_APIC
32 struct irq_data;
33 struct pci_dev;
34 struct msi_desc;
35 
36 enum irq_alloc_type {
37 	X86_IRQ_ALLOC_TYPE_IOAPIC = 1,
38 	X86_IRQ_ALLOC_TYPE_HPET,
39 	X86_IRQ_ALLOC_TYPE_PCI_MSI,
40 	X86_IRQ_ALLOC_TYPE_PCI_MSIX,
41 	X86_IRQ_ALLOC_TYPE_DMAR,
42 	X86_IRQ_ALLOC_TYPE_AMDVI,
43 	X86_IRQ_ALLOC_TYPE_UV,
44 };
45 
46 struct ioapic_alloc_info {
47 	int		pin;
48 	int		node;
49 	u32		is_level	: 1;
50 	u32		active_low	: 1;
51 	u32		valid		: 1;
52 };
53 
54 struct uv_alloc_info {
55 	int		limit;
56 	int		blade;
57 	unsigned long	offset;
58 	char		*name;
59 
60 };
61 
62 /**
63  * irq_alloc_info - X86 specific interrupt allocation info
64  * @type:	X86 specific allocation type
65  * @flags:	Flags for allocation tweaks
66  * @devid:	Device ID for allocations
67  * @hwirq:	Associated hw interrupt number in the domain
68  * @mask:	CPU mask for vector allocation
69  * @desc:	Pointer to msi descriptor
70  * @data:	Allocation specific data
71  *
72  * @ioapic:	IOAPIC specific allocation data
73  * @uv:		UV specific allocation data
74 */
75 struct irq_alloc_info {
76 	enum irq_alloc_type	type;
77 	u32			flags;
78 	u32			devid;
79 	irq_hw_number_t		hwirq;
80 	const struct cpumask	*mask;
81 	struct msi_desc		*desc;
82 	void			*data;
83 
84 	union {
85 		struct ioapic_alloc_info	ioapic;
86 		struct uv_alloc_info		uv;
87 	};
88 };
89 
90 struct irq_cfg {
91 	unsigned int		dest_apicid;
92 	unsigned int		vector;
93 };
94 
95 extern struct irq_cfg *irq_cfg(unsigned int irq);
96 extern struct irq_cfg *irqd_cfg(struct irq_data *irq_data);
97 extern void lock_vector_lock(void);
98 extern void unlock_vector_lock(void);
99 #ifdef CONFIG_SMP
100 extern void vector_schedule_cleanup(struct irq_cfg *);
101 extern void irq_complete_move(struct irq_cfg *cfg);
102 #else
vector_schedule_cleanup(struct irq_cfg * c)103 static inline void vector_schedule_cleanup(struct irq_cfg *c) { }
irq_complete_move(struct irq_cfg * c)104 static inline void irq_complete_move(struct irq_cfg *c) { }
105 #endif
106 
107 extern void apic_ack_edge(struct irq_data *data);
108 #else	/*  CONFIG_X86_LOCAL_APIC */
lock_vector_lock(void)109 static inline void lock_vector_lock(void) {}
unlock_vector_lock(void)110 static inline void unlock_vector_lock(void) {}
111 #endif	/* CONFIG_X86_LOCAL_APIC */
112 
113 /* Statistics */
114 extern atomic_t irq_err_count;
115 extern atomic_t irq_mis_count;
116 
117 extern void elcr_set_level_irq(unsigned int irq);
118 
119 extern char irq_entries_start[];
120 #ifdef CONFIG_TRACING
121 #define trace_irq_entries_start irq_entries_start
122 #endif
123 
124 extern char spurious_entries_start[];
125 
126 #define VECTOR_UNUSED		NULL
127 #define VECTOR_SHUTDOWN		((void *)-1L)
128 #define VECTOR_RETRIGGERED	((void *)-2L)
129 
130 typedef struct irq_desc* vector_irq_t[NR_VECTORS];
131 DECLARE_PER_CPU(vector_irq_t, vector_irq);
132 
133 #endif /* !ASSEMBLY_ */
134 
135 #endif /* _ASM_X86_HW_IRQ_H */
136