LXR linux/drivers/iommu/irq

   1/*
   2 * Copyright (C) 2012 Advanced Micro Devices, Inc.
   3 * Author: Joerg Roedel <jroedel@suse.de>
   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 stuff that is shared between different interrupt
  19 * remapping drivers but with no need to be visible outside of the IOMMU layer.
  20 */
  21
  22#ifndef __IRQ_REMAPPING_H
  23#define __IRQ_REMAPPING_H
  24
  25#ifdef CONFIG_IRQ_REMAP
  26
  27struct irq_data;
  28struct msi_msg;
  29struct irq_domain;
  30struct irq_alloc_info;
  31
  32extern int irq_remap_broken;
  33extern int disable_sourceid_checking;
  34extern int no_x2apic_optout;
  35extern int irq_remapping_enabled;
  36
  37extern int disable_irq_post;
  38
  39struct irq_remap_ops {
  40        /* The supported capabilities */
  41        int capability;
  42
  43        /* Initializes hardware and makes it ready for remapping interrupts */
  44        int  (*prepare)(void);
  45
  46        /* Enables the remapping hardware */
  47        int  (*enable)(void);
  48
  49        /* Disables the remapping hardware */
  50        void (*disable)(void);
  51
  52        /* Reenables the remapping hardware */
  53        int  (*reenable)(int);
  54
  55        /* Enable fault handling */
  56        int  (*enable_faulting)(void);
  57
  58        /* Get the irqdomain associated the IOMMU device */
  59        struct irq_domain *(*get_ir_irq_domain)(struct irq_alloc_info *);
  60
  61        /* Get the MSI irqdomain associated with the IOMMU device */
  62        struct irq_domain *(*get_irq_domain)(struct irq_alloc_info *);
  63};
  64
  65extern struct irq_remap_ops intel_irq_remap_ops;
  66extern struct irq_remap_ops amd_iommu_irq_ops;
  67extern struct irq_remap_ops hyperv_irq_remap_ops;
  68
  69#else  /* CONFIG_IRQ_REMAP */
  70
  71#define irq_remapping_enabled 0
  72#define irq_remap_broken      0
  73#define disable_irq_post      1
  74
  75#endif /* CONFIG_IRQ_REMAP */
  76
  77#endif /* __IRQ_REMAPPING_H */
  78