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 #ifdef CONFIG_IRQ_REMAP
  26
  27 struct IO_APIC_route_entry;
  28 struct io_apic_irq_attr;
  29 struct pci_dev;
  30
  31 extern int irq_remapping_enabled;
  32
  33 extern void setup_irq_remapping_ops(void);
  34 extern int irq_remapping_supported(void);
  35 extern int irq_remapping_prepare(void);
  36 extern int irq_remapping_enable(void);
  37 extern void irq_remapping_disable(void);
  38 extern int irq_remapping_reenable(int);
  39 extern int irq_remap_enable_fault_handling(void);
  40 extern int setup_ioapic_remapped_entry(int irq,
  41                                        struct IO_APIC_route_entry *entry,
  42                                        unsigned int destination,
  43                                        int vector,
  44                                        struct io_apic_irq_attr *attr);
  45 extern int set_remapped_irq_affinity(struct irq_data *data,
  46                                      const struct cpumask *mask,
  47                                      bool force);
  48 extern void free_remapped_irq(int irq);
  49 extern void compose_remapped_msi_msg(struct pci_dev *pdev,
  50                                      unsigned int irq, unsigned int dest,
  51                                      struct msi_msg *msg, u8 hpet_id);
  52 extern int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec);
  53 extern int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq,
  54                                   int index, int sub_handle);
  55 extern int setup_hpet_msi_remapped(unsigned int irq, unsigned int id);
  56
  57 #else  /* CONFIG_IRQ_REMAP */
  58
  59 #define irq_remapping_enabled   0
  60
  61 static inline void setup_irq_remapping_ops(void) { }
  62 static inline int irq_remapping_supported(void) { return 0; }
  63 static inline int irq_remapping_prepare(void) { return -ENODEV; }
  64 static inline int irq_remapping_enable(void) { return -ENODEV; }
  65 static inline void irq_remapping_disable(void) { }
  66 static inline int irq_remapping_reenable(int eim) { return -ENODEV; }
  67 static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; }
  68 static inline int setup_ioapic_remapped_entry(int irq,
  69                                               struct IO_APIC_route_entry *entry,
  70                                               unsigned int destination,
  71                                               int vector,
  72                                               struct io_apic_irq_attr *attr)
  73 {
  74         return -ENODEV;
  75 }
  76 static inline int set_remapped_irq_affinity(struct irq_data *data,
  77                                             const struct cpumask *mask,
  78                                             bool force)
  79 {
  80         return 0;
  81 }
  82 static inline void free_remapped_irq(int irq) { }
  83 static inline void compose_remapped_msi_msg(struct pci_dev *pdev,
  84                                             unsigned int irq, unsigned int dest,
  85                                             struct msi_msg *msg, u8 hpet_id)
  86 {
  87 }
  88 static inline int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec)
  89 {
  90         return -ENODEV;
  91 }
  92 static inline int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq,
  93                                          int index, int sub_handle)
  94 {
  95         return -ENODEV;
  96 }
  97 static inline int setup_hpet_msi_remapped(unsigned int irq, unsigned int id)
  98 {
  99         return -ENODEV;
 100 }
 101 #endif /* CONFIG_IRQ_REMAP */
 102
 103 #endif /* __X86_IRQ_REMAPPING_H */