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 extern struct irq_remap_ops hyperv_irq_remap_ops; 68 69 #else /* CONFIG_IRQ_REMAP */ 70 71 #define irq_remapping_enabled 0 72 #define irq_remap_broken 0 73 #define disable_irq_post 1 74 75 #endif /* CONFIG_IRQ_REMAP */ 76 77 #endif /* __IRQ_REMAPPING_H */ 78