drivers/iommu/irq_remapping.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2012 Advanced Micro Devices, Inc.
   4  * Author: Joerg Roedel <jroedel@suse.de>
   5  *
   6  * This header file contains stuff that is shared between different interrupt
   7  * remapping drivers but with no need to be visible outside of the IOMMU layer.
   8  */
   9
  10 #ifndef __IRQ_REMAPPING_H
  11 #define __IRQ_REMAPPING_H
  12
  13 #ifdef CONFIG_IRQ_REMAP
  14
  15 struct irq_data;
  16 struct msi_msg;
  17 struct irq_domain;
  18 struct irq_alloc_info;
  19
  20 extern int irq_remap_broken;
  21 extern int disable_sourceid_checking;
  22 extern int no_x2apic_optout;
  23 extern int irq_remapping_enabled;
  24
  25 extern int disable_irq_post;
  26
  27 struct irq_remap_ops {
  28         /* The supported capabilities */
  29         int capability;
  30
  31         /* Initializes hardware and makes it ready for remapping interrupts */
  32         int  (*prepare)(void);
  33
  34         /* Enables the remapping hardware */
  35         int  (*enable)(void);
  36
  37         /* Disables the remapping hardware */
  38         void (*disable)(void);
  39
  40         /* Reenables the remapping hardware */
  41         int  (*reenable)(int);
  42
  43         /* Enable fault handling */
  44         int  (*enable_faulting)(void);
  45
  46         /* Get the irqdomain associated the IOMMU device */
  47         struct irq_domain *(*get_ir_irq_domain)(struct irq_alloc_info *);
  48
  49         /* Get the MSI irqdomain associated with the IOMMU device */
  50         struct irq_domain *(*get_irq_domain)(struct irq_alloc_info *);
  51 };
  52
  53 extern struct irq_remap_ops intel_irq_remap_ops;
  54 extern struct irq_remap_ops amd_iommu_irq_ops;
  55 extern struct irq_remap_ops hyperv_irq_remap_ops;
  56
  57 #else  /* CONFIG_IRQ_REMAP */
  58
  59 #define irq_remapping_enabled 0
  60 #define irq_remap_broken      0
  61 #define disable_irq_post      1
  62
  63 #endif /* CONFIG_IRQ_REMAP */
  64
  65 #endif /* __IRQ_REMAPPING_H */