drivers/iommu/irq_remapping.h

   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
  27 struct irq_data;
  28 struct msi_msg;
  29 struct irq_domain;
  30 struct irq_alloc_info;
  31
  32 extern int irq_remap_broken;
  33 extern int disable_sourceid_checking;
  34 extern int no_x2apic_optout;
  35 extern int irq_remapping_enabled;
  36
  37 extern int disable_irq_post;
  38
  39 struct 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
  65 extern struct irq_remap_ops intel_irq_remap_ops;
  66 extern struct irq_remap_ops amd_iommu_irq_ops;
  67
  68 #else  /* CONFIG_IRQ_REMAP */
  69
  70 #define irq_remapping_enabled 0
  71 #define irq_remap_broken      0
  72 #define disable_irq_post      1
  73
  74 #endif /* CONFIG_IRQ_REMAP */
  75
  76 #endif /* __IRQ_REMAPPING_H */