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 #ifdef CONFIG_IRQ_REMAP
  28
  29 extern int irq_remapping_enabled;
  30
  31 extern void setup_irq_remapping_ops(void);
  32 extern int irq_remapping_supported(void);
  33 extern int irq_remapping_prepare(void);
  34 extern int irq_remapping_enable(void);
  35 extern void irq_remapping_disable(void);
  36 extern int irq_remapping_reenable(int);
  37 extern int irq_remap_enable_fault_handling(void);
  38 extern int setup_ioapic_remapped_entry(int irq,
  39                                        struct IO_APIC_route_entry *entry,
  40                                        unsigned int destination,
  41                                        int vector,
  42                                        struct io_apic_irq_attr *attr);
  43 extern void free_remapped_irq(int irq);
  44 extern void compose_remapped_msi_msg(struct pci_dev *pdev,
  45                                      unsigned int irq, unsigned int dest,
  46                                      struct msi_msg *msg, u8 hpet_id);
  47 extern int setup_hpet_msi_remapped(unsigned int irq, unsigned int id);
  48
  49 #else  /* CONFIG_IRQ_REMAP */
  50
  51 #define irq_remapping_enabled   0
  52
  53 static inline void setup_irq_remapping_ops(void) { }
  54 static inline int irq_remapping_supported(void) { return 0; }
  55 static inline int irq_remapping_prepare(void) { return -ENODEV; }
  56 static inline int irq_remapping_enable(void) { return -ENODEV; }
  57 static inline void irq_remapping_disable(void) { }
  58 static inline int irq_remapping_reenable(int eim) { return -ENODEV; }
  59 static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; }
  60 static inline int setup_ioapic_remapped_entry(int irq,
  61                                               struct IO_APIC_route_entry *entry,
  62                                               unsigned int destination,
  63                                               int vector,
  64                                               struct io_apic_irq_attr *attr)
  65 {
  66         return -ENODEV;
  67 }
  68 static inline void free_remapped_irq(int irq) { }
  69 static inline void compose_remapped_msi_msg(struct pci_dev *pdev,
  70                                             unsigned int irq, unsigned int dest,
  71                                             struct msi_msg *msg, u8 hpet_id)
  72 {
  73 }
  74 static inline int setup_hpet_msi_remapped(unsigned int irq, unsigned int id)
  75 {
  76         return -ENODEV;
  77 }
  78 #endif /* CONFIG_IRQ_REMAP */
  79
  80 #endif /* __X86_IRQ_REMAPPING_H */