drivers/iommu/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 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 IO_APIC_route_entry;
  28 struct io_apic_irq_attr;
  29 struct irq_data;
  30 struct cpumask;
  31 struct pci_dev;
  32 struct msi_msg;
  33
  34 extern int disable_irq_remap;
  35 extern int irq_remap_broken;
  36 extern int disable_sourceid_checking;
  37 extern int no_x2apic_optout;
  38 extern int irq_remapping_enabled;
  39
  40 struct irq_remap_ops {
  41         /* Check whether Interrupt Remapping is supported */
  42         int (*supported)(void);
  43
  44         /* Initializes hardware and makes it ready for remapping interrupts */
  45         int  (*prepare)(void);
  46
  47         /* Enables the remapping hardware */
  48         int  (*enable)(void);
  49
  50         /* Disables the remapping hardware */
  51         void (*disable)(void);
  52
  53         /* Reenables the remapping hardware */
  54         int  (*reenable)(int);
  55
  56         /* Enable fault handling */
  57         int  (*enable_faulting)(void);
  58
  59         /* IO-APIC setup routine */
  60         int (*setup_ioapic_entry)(int irq, struct IO_APIC_route_entry *,
  61                                   unsigned int, int,
  62                                   struct io_apic_irq_attr *);
  63
  64         /* Set the CPU affinity of a remapped interrupt */
  65         int (*set_affinity)(struct irq_data *data, const struct cpumask *mask,
  66                             bool force);
  67
  68         /* Free an IRQ */
  69         int (*free_irq)(int);
  70
  71         /* Create MSI msg to use for interrupt remapping */
  72         void (*compose_msi_msg)(struct pci_dev *,
  73                                 unsigned int, unsigned int,
  74                                 struct msi_msg *, u8);
  75
  76         /* Allocate remapping resources for MSI */
  77         int (*msi_alloc_irq)(struct pci_dev *, int, int);
  78
  79         /* Setup the remapped MSI irq */
  80         int (*msi_setup_irq)(struct pci_dev *, unsigned int, int, int);
  81
  82         /* Setup interrupt remapping for an HPET MSI */
  83         int (*setup_hpet_msi)(unsigned int, unsigned int);
  84 };
  85
  86 extern struct irq_remap_ops intel_irq_remap_ops;
  87 extern struct irq_remap_ops amd_iommu_irq_ops;
  88
  89 #else  /* CONFIG_IRQ_REMAP */
  90
  91 #define irq_remapping_enabled 0
  92 #define disable_irq_remap     1
  93 #define irq_remap_broken      0
  94
  95 #endif /* CONFIG_IRQ_REMAP */
  96
  97 #endif /* __IRQ_REMAPPING_H */