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#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
  32struct irq_data;
  33struct pci_dev;
  34struct msi_desc;
  35
  36enum 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
  46struct 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
  54struct 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*/
  75struct 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
  90struct irq_cfg {
  91        unsigned int            dest_apicid;
  92        unsigned int            vector;
  93};
  94
  95extern struct irq_cfg *irq_cfg(unsigned int irq);
  96extern struct irq_cfg *irqd_cfg(struct irq_data *irq_data);
  97extern void lock_vector_lock(void);
  98extern void unlock_vector_lock(void);
  99#ifdef CONFIG_SMP
 100extern void send_cleanup_vector(struct irq_cfg *);
 101extern void irq_complete_move(struct irq_cfg *cfg);
 102#else
 103static inline void send_cleanup_vector(struct irq_cfg *c) { }
 104static inline void irq_complete_move(struct irq_cfg *c) { }
 105#endif
 106
 107extern void apic_ack_edge(struct irq_data *data);
 108#else   /*  CONFIG_X86_LOCAL_APIC */
 109static inline void lock_vector_lock(void) {}
 110static inline void unlock_vector_lock(void) {}
 111#endif  /* CONFIG_X86_LOCAL_APIC */
 112
 113/* Statistics */
 114extern atomic_t irq_err_count;
 115extern atomic_t irq_mis_count;
 116
 117extern void elcr_set_level_irq(unsigned int irq);
 118
 119extern char irq_entries_start[];
 120#ifdef CONFIG_TRACING
 121#define trace_irq_entries_start irq_entries_start
 122#endif
 123
 124extern char spurious_entries_start[];
 125
 126#define VECTOR_UNUSED           NULL
 127#define VECTOR_SHUTDOWN         ((void *)-1L)
 128#define VECTOR_RETRIGGERED      ((void *)-2L)
 129
 130typedef struct irq_desc* vector_irq_t[NR_VECTORS];
 131DECLARE_PER_CPU(vector_irq_t, vector_irq);
 132
 133#endif /* !ASSEMBLY_ */
 134
 135#endif /* _ASM_X86_HW_IRQ_H */
 136