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_UV,
  43         X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT,
  44         X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT,
  45 };
  46
  47 struct irq_alloc_info {
  48         enum irq_alloc_type     type;
  49         u32                     flags;
  50         const struct cpumask    *mask;  /* CPU mask for vector allocation */
  51         union {
  52                 int             unused;
  53 #ifdef  CONFIG_HPET_TIMER
  54                 struct {
  55                         int             hpet_id;
  56                         int             hpet_index;
  57                         void            *hpet_data;
  58                 };
  59 #endif
  60 #ifdef  CONFIG_PCI_MSI
  61                 struct {
  62                         struct pci_dev  *msi_dev;
  63                         irq_hw_number_t msi_hwirq;
  64                 };
  65 #endif
  66 #ifdef  CONFIG_X86_IO_APIC
  67                 struct {
  68                         int             ioapic_id;
  69                         int             ioapic_pin;
  70                         int             ioapic_node;
  71                         u32             ioapic_trigger : 1;
  72                         u32             ioapic_polarity : 1;
  73                         u32             ioapic_valid : 1;
  74                         struct IO_APIC_route_entry *ioapic_entry;
  75                 };
  76 #endif
  77 #ifdef  CONFIG_DMAR_TABLE
  78                 struct {
  79                         int             dmar_id;
  80                         void            *dmar_data;
  81                 };
  82 #endif
  83 #ifdef  CONFIG_X86_UV
  84                 struct {
  85                         int             uv_limit;
  86                         int             uv_blade;
  87                         unsigned long   uv_offset;
  88                         char            *uv_name;
  89                 };
  90 #endif
  91 #if IS_ENABLED(CONFIG_VMD)
  92                 struct {
  93                         struct msi_desc *desc;
  94                 };
  95 #endif
  96         };
  97 };
  98
  99 struct irq_cfg {
 100         unsigned int            dest_apicid;
 101         unsigned int            vector;
 102 };
 103
 104 extern struct irq_cfg *irq_cfg(unsigned int irq);
 105 extern struct irq_cfg *irqd_cfg(struct irq_data *irq_data);
 106 extern void lock_vector_lock(void);
 107 extern void unlock_vector_lock(void);
 108 #ifdef CONFIG_SMP
 109 extern void send_cleanup_vector(struct irq_cfg *);
 110 extern void irq_complete_move(struct irq_cfg *cfg);
 111 #else
 112 static inline void send_cleanup_vector(struct irq_cfg *c) { }
 113 static inline void irq_complete_move(struct irq_cfg *c) { }
 114 #endif
 115
 116 extern void apic_ack_edge(struct irq_data *data);
 117 #else   /*  CONFIG_X86_LOCAL_APIC */
 118 static inline void lock_vector_lock(void) {}
 119 static inline void unlock_vector_lock(void) {}
 120 #endif  /* CONFIG_X86_LOCAL_APIC */
 121
 122 /* Statistics */
 123 extern atomic_t irq_err_count;
 124 extern atomic_t irq_mis_count;
 125
 126 extern void elcr_set_level_irq(unsigned int irq);
 127
 128 extern char irq_entries_start[];
 129 #ifdef CONFIG_TRACING
 130 #define trace_irq_entries_start irq_entries_start
 131 #endif
 132
 133 extern char spurious_entries_start[];
 134
 135 #define VECTOR_UNUSED           NULL
 136 #define VECTOR_SHUTDOWN         ((void *)-1L)
 137 #define VECTOR_RETRIGGERED      ((void *)-2L)
 138
 139 typedef struct irq_desc* vector_irq_t[NR_VECTORS];
 140 DECLARE_PER_CPU(vector_irq_t, vector_irq);
 141
 142 #endif /* !ASSEMBLY_ */
 143
 144 #endif /* _ASM_X86_HW_IRQ_H */