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 irq_remap_broken;
36 extern int disable_sourceid_checking;
37 extern int no_x2apic_optout;
38 extern int irq_remapping_enabled;
40 struct irq_remap_ops {
41 /* Check whether Interrupt Remapping is supported */
42 int (*supported)(void);
44 /* Initializes hardware and makes it ready for remapping interrupts */
47 /* Enables the remapping hardware */
50 /* Disables the remapping hardware */
51 void (*disable)(void);
53 /* Reenables the remapping hardware */
56 /* Enable fault handling */
57 int (*enable_faulting)(void);
59 /* IO-APIC setup routine */
60 int (*setup_ioapic_entry)(int irq, struct IO_APIC_route_entry *,
62 struct io_apic_irq_attr *);
64 /* Set the CPU affinity of a remapped interrupt */
65 int (*set_affinity)(struct irq_data *data, const struct cpumask *mask,
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);
76 /* Allocate remapping resources for MSI */
77 int (*msi_alloc_irq)(struct pci_dev *, int, int);
79 /* Setup the remapped MSI irq */
80 int (*msi_setup_irq)(struct pci_dev *, unsigned int, int, int);
82 /* Setup interrupt remapping for an HPET MSI */
83 int (*setup_hpet_msi)(unsigned int, unsigned int);
86 extern struct irq_remap_ops intel_irq_remap_ops;
87 extern struct irq_remap_ops amd_iommu_irq_ops;
89 #else /* CONFIG_IRQ_REMAP */
91 #define irq_remapping_enabled 0
92 #define disable_irq_remap 1
93 #define irq_remap_broken 0
95 #endif /* CONFIG_IRQ_REMAP */
97 #endif /* __IRQ_REMAPPING_H */