LXR linux/arch/x86/include/asm/hw

   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/* Interrupt handlers registered during init_IRQ */
  30extern asmlinkage void apic_timer_interrupt(void);
  31extern asmlinkage void x86_platform_ipi(void);
  32extern asmlinkage void kvm_posted_intr_ipi(void);
  33extern asmlinkage void kvm_posted_intr_wakeup_ipi(void);
  34extern asmlinkage void kvm_posted_intr_nested_ipi(void);
  35extern asmlinkage void error_interrupt(void);
  36extern asmlinkage void irq_work_interrupt(void);
  37
  38extern asmlinkage void spurious_interrupt(void);
  39extern asmlinkage void thermal_interrupt(void);
  40extern asmlinkage void reschedule_interrupt(void);
  41
  42extern asmlinkage void irq_move_cleanup_interrupt(void);
  43extern asmlinkage void reboot_interrupt(void);
  44extern asmlinkage void threshold_interrupt(void);
  45extern asmlinkage void deferred_error_interrupt(void);
  46
  47extern asmlinkage void call_function_interrupt(void);
  48extern asmlinkage void call_function_single_interrupt(void);
  49
  50#ifdef  CONFIG_X86_LOCAL_APIC
  51struct irq_data;
  52struct pci_dev;
  53struct msi_desc;
  54
  55enum irq_alloc_type {
  56        X86_IRQ_ALLOC_TYPE_IOAPIC = 1,
  57        X86_IRQ_ALLOC_TYPE_HPET,
  58        X86_IRQ_ALLOC_TYPE_MSI,
  59        X86_IRQ_ALLOC_TYPE_MSIX,
  60        X86_IRQ_ALLOC_TYPE_DMAR,
  61        X86_IRQ_ALLOC_TYPE_UV,
  62};
  63
  64struct irq_alloc_info {
  65        enum irq_alloc_type     type;
  66        u32                     flags;
  67        const struct cpumask    *mask;  /* CPU mask for vector allocation */
  68        union {
  69                int             unused;
  70#ifdef  CONFIG_HPET_TIMER
  71                struct {
  72                        int             hpet_id;
  73                        int             hpet_index;
  74                        void            *hpet_data;
  75                };
  76#endif
  77#ifdef  CONFIG_PCI_MSI
  78                struct {
  79                        struct pci_dev  *msi_dev;
  80                        irq_hw_number_t msi_hwirq;
  81                };
  82#endif
  83#ifdef  CONFIG_X86_IO_APIC
  84                struct {
  85                        int             ioapic_id;
  86                        int             ioapic_pin;
  87                        int             ioapic_node;
  88                        u32             ioapic_trigger : 1;
  89                        u32             ioapic_polarity : 1;
  90                        u32             ioapic_valid : 1;
  91                        struct IO_APIC_route_entry *ioapic_entry;
  92                };
  93#endif
  94#ifdef  CONFIG_DMAR_TABLE
  95                struct {
  96                        int             dmar_id;
  97                        void            *dmar_data;
  98                };
  99#endif
 100#ifdef  CONFIG_HT_IRQ
 101                struct {
 102                        int             ht_pos;
 103                        int             ht_idx;
 104                        struct pci_dev  *ht_dev;
 105                        void            *ht_update;
 106                };
 107#endif
 108#ifdef  CONFIG_X86_UV
 109                struct {
 110                        int             uv_limit;
 111                        int             uv_blade;
 112                        unsigned long   uv_offset;
 113                        char            *uv_name;
 114                };
 115#endif
 116#if IS_ENABLED(CONFIG_VMD)
 117                struct {
 118                        struct msi_desc *desc;
 119                };
 120#endif
 121        };
 122};
 123
 124struct irq_cfg {
 125        unsigned int            dest_apicid;
 126        u8                      vector;
 127        u8                      old_vector;
 128};
 129
 130extern struct irq_cfg *irq_cfg(unsigned int irq);
 131extern struct irq_cfg *irqd_cfg(struct irq_data *irq_data);
 132extern void lock_vector_lock(void);
 133extern void unlock_vector_lock(void);
 134extern void setup_vector_irq(int cpu);
 135#ifdef CONFIG_SMP
 136extern void send_cleanup_vector(struct irq_cfg *);
 137extern void irq_complete_move(struct irq_cfg *cfg);
 138#else
 139static inline void send_cleanup_vector(struct irq_cfg *c) { }
 140static inline void irq_complete_move(struct irq_cfg *c) { }
 141#endif
 142
 143extern void apic_ack_edge(struct irq_data *data);
 144#else   /*  CONFIG_X86_LOCAL_APIC */
 145static inline void lock_vector_lock(void) {}
 146static inline void unlock_vector_lock(void) {}
 147#endif  /* CONFIG_X86_LOCAL_APIC */
 148
 149/* Statistics */
 150extern atomic_t irq_err_count;
 151extern atomic_t irq_mis_count;
 152
 153extern void elcr_set_level_irq(unsigned int irq);
 154
 155extern char irq_entries_start[];
 156#ifdef CONFIG_TRACING
 157#define trace_irq_entries_start irq_entries_start
 158#endif
 159
 160#define VECTOR_UNUSED           NULL
 161#define VECTOR_RETRIGGERED      ((void *)~0UL)
 162
 163typedef struct irq_desc* vector_irq_t[NR_VECTORS];
 164DECLARE_PER_CPU(vector_irq_t, vector_irq);
 165
 166#endif /* !ASSEMBLY_ */
 167
 168#endif /* _ASM_X86_HW_IRQ_H */
 169