arch/x86/include/asm/irq_remapping.h

   1 /*
   2  * Copyright (C) 2012 Advanced Micro Devices, Inc.
   3  * Author: Joerg Roedel <joerg.roedel@amd.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published
   7  * by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  17  *
  18  * This header file contains the interface of the interrupt remapping code to
  19  * the x86 interrupt management code.
  20  */
  21
  22 #ifndef __X86_IRQ_REMAPPING_H
  23 #define __X86_IRQ_REMAPPING_H
  24
  25 #include <asm/io_apic.h>
  26
  27 struct IO_APIC_route_entry;
  28 struct io_apic_irq_attr;
  29 struct irq_chip;
  30 struct msi_msg;
  31 struct pci_dev;
  32 struct irq_cfg;
  33
  34 #ifdef CONFIG_IRQ_REMAP
  35
  36 extern void set_irq_remapping_broken(void);
  37 extern int irq_remapping_prepare(void);
  38 extern int irq_remapping_enable(void);
  39 extern void irq_remapping_disable(void);
  40 extern int irq_remapping_reenable(int);
  41 extern int irq_remap_enable_fault_handling(void);
  42 extern int setup_ioapic_remapped_entry(int irq,
  43                                        struct IO_APIC_route_entry *entry,
  44                                        unsigned int destination,
  45                                        int vector,
  46                                        struct io_apic_irq_attr *attr);
  47 extern void free_remapped_irq(int irq);
  48 extern void compose_remapped_msi_msg(struct pci_dev *pdev,
  49                                      unsigned int irq, unsigned int dest,
  50                                      struct msi_msg *msg, u8 hpet_id);
  51 extern int setup_hpet_msi_remapped(unsigned int irq, unsigned int id);
  52 extern void panic_if_irq_remap(const char *msg);
  53 extern bool setup_remapped_irq(int irq,
  54                                struct irq_cfg *cfg,
  55                                struct irq_chip *chip);
  56
  57 void irq_remap_modify_chip_defaults(struct irq_chip *chip);
  58
  59 #else  /* CONFIG_IRQ_REMAP */
  60
  61 static inline void set_irq_remapping_broken(void) { }
  62 static inline int irq_remapping_prepare(void) { return -ENODEV; }
  63 static inline int irq_remapping_enable(void) { return -ENODEV; }
  64 static inline void irq_remapping_disable(void) { }
  65 static inline int irq_remapping_reenable(int eim) { return -ENODEV; }
  66 static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; }
  67 static inline int setup_ioapic_remapped_entry(int irq,
  68                                               struct IO_APIC_route_entry *entry,
  69                                               unsigned int destination,
  70                                               int vector,
  71                                               struct io_apic_irq_attr *attr)
  72 {
  73         return -ENODEV;
  74 }
  75 static inline void free_remapped_irq(int irq) { }
  76 static inline void compose_remapped_msi_msg(struct pci_dev *pdev,
  77                                             unsigned int irq, unsigned int dest,
  78                                             struct msi_msg *msg, u8 hpet_id)
  79 {
  80 }
  81 static inline int setup_hpet_msi_remapped(unsigned int irq, unsigned int id)
  82 {
  83         return -ENODEV;
  84 }
  85
  86 static inline void panic_if_irq_remap(const char *msg)
  87 {
  88 }
  89
  90 static inline void irq_remap_modify_chip_defaults(struct irq_chip *chip)
  91 {
  92 }
  93
  94 static inline bool setup_remapped_irq(int irq,
  95                                       struct irq_cfg *cfg,
  96                                       struct irq_chip *chip)
  97 {
  98         return false;
  99 }
 100 #endif /* CONFIG_IRQ_REMAP */
 101
 102 #define dmar_alloc_hwirq()      irq_alloc_hwirq(-1)
 103 #define dmar_free_hwirq         irq_free_hwirq
 104
 105 #endif /* __X86_IRQ_REMAPPING_H */