arch/x86/include/asm/hw_irq.h

   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 /* Interrupt handlers registered during init_IRQ */
  32 extern asmlinkage void apic_timer_interrupt(void);
  33 extern asmlinkage void x86_platform_ipi(void);
  34 extern asmlinkage void kvm_posted_intr_ipi(void);
  35 extern asmlinkage void kvm_posted_intr_wakeup_ipi(void);
  36 extern asmlinkage void kvm_posted_intr_nested_ipi(void);
  37 extern asmlinkage void error_interrupt(void);
  38 extern asmlinkage void irq_work_interrupt(void);
  39
  40 extern asmlinkage void spurious_interrupt(void);
  41 extern asmlinkage void thermal_interrupt(void);
  42 extern asmlinkage void reschedule_interrupt(void);
  43
  44 extern asmlinkage void irq_move_cleanup_interrupt(void);
  45 extern asmlinkage void reboot_interrupt(void);
  46 extern asmlinkage void threshold_interrupt(void);
  47 extern asmlinkage void deferred_error_interrupt(void);
  48
  49 extern asmlinkage void call_function_interrupt(void);
  50 extern asmlinkage void call_function_single_interrupt(void);
  51
  52 #ifdef  CONFIG_X86_LOCAL_APIC
  53 struct irq_data;
  54 struct pci_dev;
  55 struct msi_desc;
  56
  57 enum irq_alloc_type {
  58         X86_IRQ_ALLOC_TYPE_IOAPIC = 1,
  59         X86_IRQ_ALLOC_TYPE_HPET,
  60         X86_IRQ_ALLOC_TYPE_MSI,
  61         X86_IRQ_ALLOC_TYPE_MSIX,
  62         X86_IRQ_ALLOC_TYPE_DMAR,
  63         X86_IRQ_ALLOC_TYPE_UV,
  64 };
  65
  66 struct irq_alloc_info {
  67         enum irq_alloc_type     type;
  68         u32                     flags;
  69         const struct cpumask    *mask;  /* CPU mask for vector allocation */
  70         union {
  71                 int             unused;
  72 #ifdef  CONFIG_HPET_TIMER
  73                 struct {
  74                         int             hpet_id;
  75                         int             hpet_index;
  76                         void            *hpet_data;
  77                 };
  78 #endif
  79 #ifdef  CONFIG_PCI_MSI
  80                 struct {
  81                         struct pci_dev  *msi_dev;
  82                         irq_hw_number_t msi_hwirq;
  83                 };
  84 #endif
  85 #ifdef  CONFIG_X86_IO_APIC
  86                 struct {
  87                         int             ioapic_id;
  88                         int             ioapic_pin;
  89                         int             ioapic_node;
  90                         u32             ioapic_trigger : 1;
  91                         u32             ioapic_polarity : 1;
  92                         u32             ioapic_valid : 1;
  93                         struct IO_APIC_route_entry *ioapic_entry;
  94                 };
  95 #endif
  96 #ifdef  CONFIG_DMAR_TABLE
  97                 struct {
  98                         int             dmar_id;
  99                         void            *dmar_data;
 100                 };
 101 #endif
 102 #ifdef  CONFIG_X86_UV
 103                 struct {
 104                         int             uv_limit;
 105                         int             uv_blade;
 106                         unsigned long   uv_offset;
 107                         char            *uv_name;
 108                 };
 109 #endif
 110 #if IS_ENABLED(CONFIG_VMD)
 111                 struct {
 112                         struct msi_desc *desc;
 113                 };
 114 #endif
 115         };
 116 };
 117
 118 struct irq_cfg {
 119         unsigned int            dest_apicid;
 120         unsigned int            vector;
 121 };
 122
 123 extern struct irq_cfg *irq_cfg(unsigned int irq);
 124 extern struct irq_cfg *irqd_cfg(struct irq_data *irq_data);
 125 extern void lock_vector_lock(void);
 126 extern void unlock_vector_lock(void);
 127 #ifdef CONFIG_SMP
 128 extern void send_cleanup_vector(struct irq_cfg *);
 129 extern void irq_complete_move(struct irq_cfg *cfg);
 130 #else
 131 static inline void send_cleanup_vector(struct irq_cfg *c) { }
 132 static inline void irq_complete_move(struct irq_cfg *c) { }
 133 #endif
 134
 135 extern void apic_ack_edge(struct irq_data *data);
 136 #else   /*  CONFIG_X86_LOCAL_APIC */
 137 static inline void lock_vector_lock(void) {}
 138 static inline void unlock_vector_lock(void) {}
 139 #endif  /* CONFIG_X86_LOCAL_APIC */
 140
 141 /* Statistics */
 142 extern atomic_t irq_err_count;
 143 extern atomic_t irq_mis_count;
 144
 145 extern void elcr_set_level_irq(unsigned int irq);
 146
 147 extern char irq_entries_start[];
 148 #ifdef CONFIG_TRACING
 149 #define trace_irq_entries_start irq_entries_start
 150 #endif
 151
 152 #define VECTOR_UNUSED           NULL
 153 #define VECTOR_RETRIGGERED      ((void *)~0UL)
 154
 155 typedef struct irq_desc* vector_irq_t[NR_VECTORS];
 156 DECLARE_PER_CPU(vector_irq_t, vector_irq);
 157
 158 #endif /* !ASSEMBLY_ */
 159
 160 #endif /* _ASM_X86_HW_IRQ_H */