2 * Copyright (C) 2012 Advanced Micro Devices, Inc.
3 * Author: Joerg Roedel <joerg.roedel@amd.com>
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.
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.
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
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.
22 #ifndef __IRQ_REMAPPING_H
23 #define __IRQ_REMAPPING_H
25 #ifdef CONFIG_IRQ_REMAP
27 struct IO_APIC_route_entry
;
28 struct io_apic_irq_attr
;
34 extern int disable_irq_remap
;
35 extern int disable_sourceid_checking
;
36 extern int no_x2apic_optout
;
37 extern int irq_remapping_enabled
;
39 struct irq_remap_ops
{
40 /* Check whether Interrupt Remapping is supported */
41 int (*supported
)(void);
43 /* Initializes hardware and makes it ready for remapping interrupts */
46 /* Enables the remapping hardware */
49 /* Disables the remapping hardware */
50 void (*disable
)(void);
52 /* Reenables the remapping hardware */
55 /* Enable fault handling */
56 int (*enable_faulting
)(void);
58 /* IO-APIC setup routine */
59 int (*setup_ioapic_entry
)(int irq
, struct IO_APIC_route_entry
*,
61 struct io_apic_irq_attr
*);
63 /* Set the CPU affinity of a remapped interrupt */
64 int (*set_affinity
)(struct irq_data
*data
, const struct cpumask
*mask
,
70 /* Create MSI msg to use for interrupt remapping */
71 void (*compose_msi_msg
)(struct pci_dev
*,
72 unsigned int, unsigned int,
73 struct msi_msg
*, u8
);
75 /* Allocate remapping resources for MSI */
76 int (*msi_alloc_irq
)(struct pci_dev
*, int, int);
78 /* Setup the remapped MSI irq */
79 int (*msi_setup_irq
)(struct pci_dev
*, unsigned int, int, int);
81 /* Setup interrupt remapping for an HPET MSI */
82 int (*setup_hpet_msi
)(unsigned int, unsigned int);
85 extern struct irq_remap_ops intel_irq_remap_ops
;
86 extern struct irq_remap_ops amd_iommu_irq_ops
;
88 #else /* CONFIG_IRQ_REMAP */
90 #define irq_remapping_enabled 0
91 #define disable_irq_remap 1
93 #endif /* CONFIG_IRQ_REMAP */
95 #endif /* __IRQ_REMAPPING_H */