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