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 the interface of the interrupt remapping code to 19 * the x86 interrupt management code. 20 */ 21 22 #ifndef __X86_IRQ_REMAPPING_H 23 #define __X86_IRQ_REMAPPING_H 24 25 #include <linux/irqdomain.h> 26 #include <asm/hw_irq.h> 27 #include <asm/io_apic.h> 28 29 struct IO_APIC_route_entry; 30 struct io_apic_irq_attr; 31 struct irq_chip; 32 struct msi_msg; 33 struct pci_dev; 34 struct irq_cfg; 35 struct irq_alloc_info; 36 37 #ifdef CONFIG_IRQ_REMAP 38 39 extern void set_irq_remapping_broken(void); 40 extern int irq_remapping_prepare(void); 41 extern int irq_remapping_enable(void); 42 extern void irq_remapping_disable(void); 43 extern int irq_remapping_reenable(int); 44 extern int irq_remap_enable_fault_handling(void); 45 extern int setup_ioapic_remapped_entry(int irq, 46 struct IO_APIC_route_entry *entry, 47 unsigned int destination, 48 int vector, 49 struct io_apic_irq_attr *attr); 50 extern void free_remapped_irq(int irq); 51 extern void panic_if_irq_remap(const char *msg); 52 extern bool setup_remapped_irq(int irq, 53 struct irq_cfg *cfg, 54 struct irq_chip *chip); 55 56 void irq_remap_modify_chip_defaults(struct irq_chip *chip); 57 58 extern struct irq_domain * 59 irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info); 60 extern struct irq_domain * 61 irq_remapping_get_irq_domain(struct irq_alloc_info *info); 62 extern void irq_remapping_print_chip(struct irq_data *data, struct seq_file *p); 63 64 /* Create PCI MSI/MSIx irqdomain, use @parent as the parent irqdomain. */ 65 extern struct irq_domain *arch_create_msi_irq_domain(struct irq_domain *parent); 66 67 /* Get parent irqdomain for interrupt remapping irqdomain */ 68 static inline struct irq_domain *arch_get_ir_parent_domain(void) 69 { 70 return x86_vector_domain; 71 } 72 73 #else /* CONFIG_IRQ_REMAP */ 74 75 static inline void set_irq_remapping_broken(void) { } 76 static inline int irq_remapping_prepare(void) { return -ENODEV; } 77 static inline int irq_remapping_enable(void) { return -ENODEV; } 78 static inline void irq_remapping_disable(void) { } 79 static inline int irq_remapping_reenable(int eim) { return -ENODEV; } 80 static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; } 81 static inline int setup_ioapic_remapped_entry(int irq, 82 struct IO_APIC_route_entry *entry, 83 unsigned int destination, 84 int vector, 85 struct io_apic_irq_attr *attr) 86 { 87 return -ENODEV; 88 } 89 static inline void free_remapped_irq(int irq) { } 90 91 static inline void panic_if_irq_remap(const char *msg) 92 { 93 } 94 95 static inline void irq_remap_modify_chip_defaults(struct irq_chip *chip) 96 { 97 } 98 99 static inline bool setup_remapped_irq(int irq, 100 struct irq_cfg *cfg, 101 struct irq_chip *chip) 102 { 103 return false; 104 } 105 106 static inline struct irq_domain * 107 irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info) 108 { 109 return NULL; 110 } 111 112 static inline struct irq_domain * 113 irq_remapping_get_irq_domain(struct irq_alloc_info *info) 114 { 115 return NULL; 116 } 117 118 #define irq_remapping_print_chip NULL 119 #endif /* CONFIG_IRQ_REMAP */ 120 #endif /* __X86_IRQ_REMAPPING_H */ 121