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1 #ifndef _ASM_X86_HW_IRQ_H
2 #define _ASM_X86_HW_IRQ_H
3 
4 /*
5  * (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
6  *
7  * moved some of the old arch/i386/kernel/irq.h to here. VY
8  *
9  * IRQ/IPI changes taken from work by Thomas Radke
10  * <tomsoft@informatik.tu-chemnitz.de>
11  *
12  * hacked by Andi Kleen for x86-64.
13  * unified by tglx
14  */
15 
16 #include <asm/irq_vectors.h>
17 
18 #ifndef __ASSEMBLY__
19 
20 #include <linux/percpu.h>
21 #include <linux/profile.h>
22 #include <linux/smp.h>
23 
24 #include <linux/atomic.h>
25 #include <asm/irq.h>
26 #include <asm/sections.h>
27 
28 /* Interrupt handlers registered during init_IRQ */
29 extern asmlinkage void apic_timer_interrupt(void);
30 extern asmlinkage void x86_platform_ipi(void);
31 extern asmlinkage void kvm_posted_intr_ipi(void);
32 extern asmlinkage void kvm_posted_intr_wakeup_ipi(void);
33 extern asmlinkage void error_interrupt(void);
34 extern asmlinkage void irq_work_interrupt(void);
35 
36 extern asmlinkage void spurious_interrupt(void);
37 extern asmlinkage void thermal_interrupt(void);
38 extern asmlinkage void reschedule_interrupt(void);
39 
40 extern asmlinkage void irq_move_cleanup_interrupt(void);
41 extern asmlinkage void reboot_interrupt(void);
42 extern asmlinkage void threshold_interrupt(void);
43 extern asmlinkage void deferred_error_interrupt(void);
44 
45 extern asmlinkage void call_function_interrupt(void);
46 extern asmlinkage void call_function_single_interrupt(void);
47 
48 #ifdef CONFIG_TRACING
49 /* Interrupt handlers registered during init_IRQ */
50 extern void trace_apic_timer_interrupt(void);
51 extern void trace_x86_platform_ipi(void);
52 extern void trace_error_interrupt(void);
53 extern void trace_irq_work_interrupt(void);
54 extern void trace_spurious_interrupt(void);
55 extern void trace_thermal_interrupt(void);
56 extern void trace_reschedule_interrupt(void);
57 extern void trace_threshold_interrupt(void);
58 extern void trace_deferred_error_interrupt(void);
59 extern void trace_call_function_interrupt(void);
60 extern void trace_call_function_single_interrupt(void);
61 #define trace_irq_move_cleanup_interrupt  irq_move_cleanup_interrupt
62 #define trace_reboot_interrupt  reboot_interrupt
63 #define trace_kvm_posted_intr_ipi kvm_posted_intr_ipi
64 #define trace_kvm_posted_intr_wakeup_ipi kvm_posted_intr_wakeup_ipi
65 #endif /* CONFIG_TRACING */
66 
67 #ifdef	CONFIG_X86_LOCAL_APIC
68 struct irq_data;
69 struct pci_dev;
70 struct msi_desc;
71 
72 enum irq_alloc_type {
73 	X86_IRQ_ALLOC_TYPE_IOAPIC = 1,
74 	X86_IRQ_ALLOC_TYPE_HPET,
75 	X86_IRQ_ALLOC_TYPE_MSI,
76 	X86_IRQ_ALLOC_TYPE_MSIX,
77 	X86_IRQ_ALLOC_TYPE_DMAR,
78 	X86_IRQ_ALLOC_TYPE_UV,
79 };
80 
81 struct irq_alloc_info {
82 	enum irq_alloc_type	type;
83 	u32			flags;
84 	const struct cpumask	*mask;	/* CPU mask for vector allocation */
85 	union {
86 		int		unused;
87 #ifdef	CONFIG_HPET_TIMER
88 		struct {
89 			int		hpet_id;
90 			int		hpet_index;
91 			void		*hpet_data;
92 		};
93 #endif
94 #ifdef	CONFIG_PCI_MSI
95 		struct {
96 			struct pci_dev	*msi_dev;
97 			irq_hw_number_t	msi_hwirq;
98 		};
99 #endif
100 #ifdef	CONFIG_X86_IO_APIC
101 		struct {
102 			int		ioapic_id;
103 			int		ioapic_pin;
104 			int		ioapic_node;
105 			u32		ioapic_trigger : 1;
106 			u32		ioapic_polarity : 1;
107 			u32		ioapic_valid : 1;
108 			struct IO_APIC_route_entry *ioapic_entry;
109 		};
110 #endif
111 #ifdef	CONFIG_DMAR_TABLE
112 		struct {
113 			int		dmar_id;
114 			void		*dmar_data;
115 		};
116 #endif
117 #ifdef	CONFIG_HT_IRQ
118 		struct {
119 			int		ht_pos;
120 			int		ht_idx;
121 			struct pci_dev	*ht_dev;
122 			void		*ht_update;
123 		};
124 #endif
125 #ifdef	CONFIG_X86_UV
126 		struct {
127 			int		uv_limit;
128 			int		uv_blade;
129 			unsigned long	uv_offset;
130 			char		*uv_name;
131 		};
132 #endif
133 	};
134 };
135 
136 struct irq_cfg {
137 	unsigned int		dest_apicid;
138 	u8			vector;
139 	u8			old_vector;
140 };
141 
142 extern struct irq_cfg *irq_cfg(unsigned int irq);
143 extern struct irq_cfg *irqd_cfg(struct irq_data *irq_data);
144 extern void lock_vector_lock(void);
145 extern void unlock_vector_lock(void);
146 extern void setup_vector_irq(int cpu);
147 #ifdef CONFIG_SMP
148 extern void send_cleanup_vector(struct irq_cfg *);
149 extern void irq_complete_move(struct irq_cfg *cfg);
150 #else
send_cleanup_vector(struct irq_cfg * c)151 static inline void send_cleanup_vector(struct irq_cfg *c) { }
irq_complete_move(struct irq_cfg * c)152 static inline void irq_complete_move(struct irq_cfg *c) { }
153 #endif
154 
155 extern void apic_ack_edge(struct irq_data *data);
156 #else	/*  CONFIG_X86_LOCAL_APIC */
lock_vector_lock(void)157 static inline void lock_vector_lock(void) {}
unlock_vector_lock(void)158 static inline void unlock_vector_lock(void) {}
159 #endif	/* CONFIG_X86_LOCAL_APIC */
160 
161 /* Statistics */
162 extern atomic_t irq_err_count;
163 extern atomic_t irq_mis_count;
164 
165 extern void elcr_set_level_irq(unsigned int irq);
166 
167 /* SMP */
168 extern __visible void smp_apic_timer_interrupt(struct pt_regs *);
169 extern __visible void smp_spurious_interrupt(struct pt_regs *);
170 extern __visible void smp_x86_platform_ipi(struct pt_regs *);
171 extern __visible void smp_error_interrupt(struct pt_regs *);
172 #ifdef CONFIG_X86_IO_APIC
173 extern asmlinkage void smp_irq_move_cleanup_interrupt(void);
174 #endif
175 #ifdef CONFIG_SMP
176 extern __visible void smp_reschedule_interrupt(struct pt_regs *);
177 extern __visible void smp_call_function_interrupt(struct pt_regs *);
178 extern __visible void smp_call_function_single_interrupt(struct pt_regs *);
179 #endif
180 
181 extern char irq_entries_start[];
182 #ifdef CONFIG_TRACING
183 #define trace_irq_entries_start irq_entries_start
184 #endif
185 
186 #define VECTOR_UNUSED		NULL
187 #define VECTOR_RETRIGGERED	((void *)~0UL)
188 
189 typedef struct irq_desc* vector_irq_t[NR_VECTORS];
190 DECLARE_PER_CPU_USER_MAPPED(vector_irq_t, vector_irq);
191 
192 #endif /* !ASSEMBLY_ */
193 
194 #endif /* _ASM_X86_HW_IRQ_H */
195