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_UV,
43 X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT,
44 X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT,
45 };
46
47 struct ioapic_alloc_info {
48 int pin;
49 int node;
50 u32 trigger : 1;
51 u32 polarity : 1;
52 u32 valid : 1;
53 struct IO_APIC_route_entry *entry;
54 };
55
56 struct uv_alloc_info {
57 int limit;
58 int blade;
59 unsigned long offset;
60 char *name;
61
62 };
63
64 /**
65 * irq_alloc_info - X86 specific interrupt allocation info
66 * @type: X86 specific allocation type
67 * @flags: Flags for allocation tweaks
68 * @devid: Device ID for allocations
69 * @hwirq: Associated hw interrupt number in the domain
70 * @mask: CPU mask for vector allocation
71 * @desc: Pointer to msi descriptor
72 * @data: Allocation specific data
73 *
74 * @ioapic: IOAPIC specific allocation data
75 * @uv: UV specific allocation data
76 */
77 struct irq_alloc_info {
78 enum irq_alloc_type type;
79 u32 flags;
80 u32 devid;
81 irq_hw_number_t hwirq;
82 const struct cpumask *mask;
83 struct msi_desc *desc;
84 void *data;
85
86 union {
87 struct ioapic_alloc_info ioapic;
88 struct uv_alloc_info uv;
89 };
90 };
91
92 struct irq_cfg {
93 unsigned int dest_apicid;
94 unsigned int vector;
95 };
96
97 extern struct irq_cfg *irq_cfg(unsigned int irq);
98 extern struct irq_cfg *irqd_cfg(struct irq_data *irq_data);
99 extern void lock_vector_lock(void);
100 extern void unlock_vector_lock(void);
101 #ifdef CONFIG_SMP
102 extern void send_cleanup_vector(struct irq_cfg *);
103 extern void irq_complete_move(struct irq_cfg *cfg);
104 #else
send_cleanup_vector(struct irq_cfg * c)105 static inline void send_cleanup_vector(struct irq_cfg *c) { }
irq_complete_move(struct irq_cfg * c)106 static inline void irq_complete_move(struct irq_cfg *c) { }
107 #endif
108
109 extern void apic_ack_edge(struct irq_data *data);
110 #else /* CONFIG_X86_LOCAL_APIC */
lock_vector_lock(void)111 static inline void lock_vector_lock(void) {}
unlock_vector_lock(void)112 static inline void unlock_vector_lock(void) {}
113 #endif /* CONFIG_X86_LOCAL_APIC */
114
115 /* Statistics */
116 extern atomic_t irq_err_count;
117 extern atomic_t irq_mis_count;
118
119 extern void elcr_set_level_irq(unsigned int irq);
120
121 extern char irq_entries_start[];
122 #ifdef CONFIG_TRACING
123 #define trace_irq_entries_start irq_entries_start
124 #endif
125
126 extern char spurious_entries_start[];
127
128 #define VECTOR_UNUSED NULL
129 #define VECTOR_SHUTDOWN ((void *)-1L)
130 #define VECTOR_RETRIGGERED ((void *)-2L)
131
132 typedef struct irq_desc* vector_irq_t[NR_VECTORS];
133 DECLARE_PER_CPU(vector_irq_t, vector_irq);
134
135 #endif /* !ASSEMBLY_ */
136
137 #endif /* _ASM_X86_HW_IRQ_H */
138
