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 send_cleanup_vector(struct irq_cfg *);
101 extern void irq_complete_move(struct irq_cfg *cfg);
102 #else
send_cleanup_vector(struct irq_cfg * c)103 static inline void send_cleanup_vector(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