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
30 struct irq_data;
31 struct pci_dev;
32 struct msi_desc;
33
34 enum 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
44 struct 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
52 struct 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 */
73 struct 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
88 struct irq_cfg {
89 unsigned int dest_apicid;
90 unsigned int vector;
91 };
92
93 extern struct irq_cfg *irq_cfg(unsigned int irq);
94 extern struct irq_cfg *irqd_cfg(struct irq_data *irq_data);
95 extern void lock_vector_lock(void);
96 extern void unlock_vector_lock(void);
97 #ifdef CONFIG_SMP
98 extern void vector_schedule_cleanup(struct irq_cfg *);
99 extern void irq_complete_move(struct irq_cfg *cfg);
100 #else
101 static inline void vector_schedule_cleanup(struct irq_cfg *c) { }
102 static inline void irq_complete_move(struct irq_cfg *c) { }
103 #endif
104
105 extern void apic_ack_edge(struct irq_data *data);
106 #else /* CONFIG_IRQ_DOMAIN_HIERARCHY */
107 static inline void lock_vector_lock(void) {}
108 static inline void unlock_vector_lock(void) {}
109 #endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */
110
111 /* Statistics */
112 extern atomic_t irq_err_count;
113 extern atomic_t irq_mis_count;
114
115 extern void elcr_set_level_irq(unsigned int irq);
116
117 extern char irq_entries_start[];
118 #ifdef CONFIG_TRACING
119 #define trace_irq_entries_start irq_entries_start
120 #endif
121
122 extern char spurious_entries_start[];
123
124 #define VECTOR_UNUSED NULL
125 #define VECTOR_SHUTDOWN ((void *)-1L)
126 #define VECTOR_RETRIGGERED ((void *)-2L)
127
128 typedef struct irq_desc* vector_irq_t[NR_VECTORS];
129 DECLARE_PER_CPU(vector_irq_t, vector_irq);
130
131 #endif /* !ASSEMBLY_ */
132
133 #endif /* _ASM_X86_HW_IRQ_H */
134
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