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 (*alloc_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 */ 98