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_MSI,
  40         X86_IRQ_ALLOC_TYPE_MSIX,
  41         X86_IRQ_ALLOC_TYPE_DMAR,
  42         X86_IRQ_ALLOC_TYPE_UV,
  43 };
  44
  45 struct irq_alloc_info {
  46         enum irq_alloc_type     type;
  47         u32                     flags;
  48         const struct cpumask    *mask;  /* CPU mask for vector allocation */
  49         union {
  50                 int             unused;
  51 #ifdef  CONFIG_HPET_TIMER
  52                 struct {
  53                         int             hpet_id;
  54                         int             hpet_index;
  55                         void            *hpet_data;
  56                 };
  57 #endif
  58 #ifdef  CONFIG_PCI_MSI
  59                 struct {
  60                         struct pci_dev  *msi_dev;
  61                         irq_hw_number_t msi_hwirq;
  62                 };
  63 #endif
  64 #ifdef  CONFIG_X86_IO_APIC
  65                 struct {
  66                         int             ioapic_id;
  67                         int             ioapic_pin;
  68                         int             ioapic_node;
  69                         u32             ioapic_trigger : 1;
  70                         u32             ioapic_polarity : 1;
  71                         u32             ioapic_valid : 1;
  72                         struct IO_APIC_route_entry *ioapic_entry;
  73                 };
  74 #endif
  75 #ifdef  CONFIG_DMAR_TABLE
  76                 struct {
  77                         int             dmar_id;
  78                         void            *dmar_data;
  79                 };
  80 #endif
  81 #ifdef  CONFIG_X86_UV
  82                 struct {
  83                         int             uv_limit;
  84                         int             uv_blade;
  85                         unsigned long   uv_offset;
  86                         char            *uv_name;
  87                 };
  88 #endif
  89 #if IS_ENABLED(CONFIG_VMD)
  90                 struct {
  91                         struct msi_desc *desc;
  92                 };
  93 #endif
  94         };
  95 };
  96
  97 struct irq_cfg {
  98         unsigned int            dest_apicid;
  99         unsigned int            vector;
 100 };
 101
 102 extern struct irq_cfg *irq_cfg(unsigned int irq);
 103 extern struct irq_cfg *irqd_cfg(struct irq_data *irq_data);
 104 extern void lock_vector_lock(void);
 105 extern void unlock_vector_lock(void);
 106 #ifdef CONFIG_SMP
 107 extern void send_cleanup_vector(struct irq_cfg *);
 108 extern void irq_complete_move(struct irq_cfg *cfg);
 109 #else
 110 static inline void send_cleanup_vector(struct irq_cfg *c) { }
 111 static inline void irq_complete_move(struct irq_cfg *c) { }
 112 #endif
 113
 114 extern void apic_ack_edge(struct irq_data *data);
 115 #else   /*  CONFIG_X86_LOCAL_APIC */
 116 static inline void lock_vector_lock(void) {}
 117 static inline void unlock_vector_lock(void) {}
 118 #endif  /* CONFIG_X86_LOCAL_APIC */
 119
 120 /* Statistics */
 121 extern atomic_t irq_err_count;
 122 extern atomic_t irq_mis_count;
 123
 124 extern void elcr_set_level_irq(unsigned int irq);
 125
 126 extern char irq_entries_start[];
 127 #ifdef CONFIG_TRACING
 128 #define trace_irq_entries_start irq_entries_start
 129 #endif
 130
 131 extern char spurious_entries_start[];
 132
 133 #define VECTOR_UNUSED           NULL
 134 #define VECTOR_SHUTDOWN         ((void *)-1L)
 135 #define VECTOR_RETRIGGERED      ((void *)-2L)
 136
 137 typedef struct irq_desc* vector_irq_t[NR_VECTORS];
 138 DECLARE_PER_CPU(vector_irq_t, vector_irq);
 139
 140 #endif /* !ASSEMBLY_ */
 141
 142 #endif /* _ASM_X86_HW_IRQ_H */