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 #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 #ifdef  CONFIG_IRQ_DOMAIN_HIERARCHY
  30 struct irq_data;
  31 struct pci_dev;
  32 struct msi_desc;
  33
  34 enum irq_alloc_type {
  35         X86_IRQ_ALLOC_TYPE_IOAPIC = 1,
  36         X86_IRQ_ALLOC_TYPE_HPET,
  37         X86_IRQ_ALLOC_TYPE_PCI_MSI,
  38         X86_IRQ_ALLOC_TYPE_PCI_MSIX,
  39         X86_IRQ_ALLOC_TYPE_DMAR,
  40         X86_IRQ_ALLOC_TYPE_AMDVI,
  41         X86_IRQ_ALLOC_TYPE_UV,
  42 };
  43
  44 struct ioapic_alloc_info {
  45         int             pin;
  46         int             node;
  47         u32             is_level        : 1;
  48         u32             active_low      : 1;
  49         u32             valid           : 1;
  50 };
  51
  52 struct uv_alloc_info {
  53         int             limit;
  54         int             blade;
  55         unsigned long   offset;
  56         char            *name;
  57
  58 };
  59
  60 /**
  61  * irq_alloc_info - X86 specific interrupt allocation info
  62  * @type:       X86 specific allocation type
  63  * @flags:      Flags for allocation tweaks
  64  * @devid:      Device ID for allocations
  65  * @hwirq:      Associated hw interrupt number in the domain
  66  * @mask:       CPU mask for vector allocation
  67  * @desc:       Pointer to msi descriptor
  68  * @data:       Allocation specific data
  69  *
  70  * @ioapic:     IOAPIC specific allocation data
  71  * @uv:         UV specific allocation data
  72 */
  73 struct irq_alloc_info {
  74         enum irq_alloc_type     type;
  75         u32                     flags;
  76         u32                     devid;
  77         irq_hw_number_t         hwirq;
  78         const struct cpumask    *mask;
  79         struct msi_desc         *desc;
  80         void                    *data;
  81
  82         union {
  83                 struct ioapic_alloc_info        ioapic;
  84                 struct uv_alloc_info            uv;
  85         };
  86 };
  87
  88 struct irq_cfg {
  89         unsigned int            dest_apicid;
  90         unsigned int            vector;
  91 };
  92
  93 extern struct irq_cfg *irq_cfg(unsigned int irq);
  94 extern struct irq_cfg *irqd_cfg(struct irq_data *irq_data);
  95 extern void lock_vector_lock(void);
  96 extern void unlock_vector_lock(void);
  97 #ifdef CONFIG_SMP
  98 extern void vector_schedule_cleanup(struct irq_cfg *);
  99 extern void irq_complete_move(struct irq_cfg *cfg);
 100 #else
 101 static inline void vector_schedule_cleanup(struct irq_cfg *c) { }
 102 static inline void irq_complete_move(struct irq_cfg *c) { }
 103 #endif
 104
 105 extern void apic_ack_edge(struct irq_data *data);
 106 #else   /*  CONFIG_IRQ_DOMAIN_HIERARCHY */
 107 static inline void lock_vector_lock(void) {}
 108 static inline void unlock_vector_lock(void) {}
 109 #endif  /* CONFIG_IRQ_DOMAIN_HIERARCHY */
 110
 111 /* Statistics */
 112 extern atomic_t irq_err_count;
 113 extern atomic_t irq_mis_count;
 114
 115 extern void elcr_set_level_irq(unsigned int irq);
 116
 117 extern char irq_entries_start[];
 118 #ifdef CONFIG_TRACING
 119 #define trace_irq_entries_start irq_entries_start
 120 #endif
 121
 122 extern char spurious_entries_start[];
 123
 124 #define VECTOR_UNUSED           NULL
 125 #define VECTOR_SHUTDOWN         ((void *)-1L)
 126 #define VECTOR_RETRIGGERED      ((void *)-2L)
 127
 128 typedef struct irq_desc* vector_irq_t[NR_VECTORS];
 129 DECLARE_PER_CPU(vector_irq_t, vector_irq);
 130
 131 #endif /* !ASSEMBLY_ */
 132
 133 #endif /* _ASM_X86_HW_IRQ_H */