1 /* 2 * Copyright (c) 2006, Intel Corporation. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms and conditions of the GNU General Public License, 6 * version 2, as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11 * more details. 12 * 13 * You should have received a copy of the GNU General Public License along with 14 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple 15 * Place - Suite 330, Boston, MA 02111-1307 USA. 16 * 17 * Copyright (C) Ashok Raj <[email protected]> 18 * Copyright (C) Shaohua Li <[email protected]> 19 */ 20 21 #ifndef __DMAR_H__ 22 #define __DMAR_H__ 23 24 #include <linux/acpi.h> 25 #include <linux/types.h> 26 #include <linux/msi.h> 27 28 #if defined(CONFIG_DMAR) || defined(CONFIG_INTR_REMAP) 29 struct intel_iommu; 30 31 struct dmar_drhd_unit { 32 struct list_head list; /* list of drhd units */ 33 struct acpi_dmar_header *hdr; /* ACPI header */ 34 u64 reg_base_addr; /* register base address*/ 35 struct pci_dev **devices; /* target device array */ 36 int devices_cnt; /* target device count */ 37 u8 ignored:1; /* ignore drhd */ 38 u8 include_all:1; 39 struct intel_iommu *iommu; 40 }; 41 42 extern struct list_head dmar_drhd_units; 43 44 #define for_each_drhd_unit(drhd) \ 45 list_for_each_entry(drhd, &dmar_drhd_units, list) 46 47 extern int dmar_table_init(void); 48 extern int early_dmar_detect(void); 49 extern int dmar_dev_scope_init(void); 50 51 /* Intel IOMMU detection */ 52 extern void detect_intel_iommu(void); 53 54 55 extern int parse_ioapics_under_ir(void); 56 extern int alloc_iommu(struct dmar_drhd_unit *); 57 #else 58 static inline void detect_intel_iommu(void) 59 { 60 return; 61 } 62 63 static inline int dmar_table_init(void) 64 { 65 return -ENODEV; 66 } 67 #endif /* !CONFIG_DMAR && !CONFIG_INTR_REMAP */ 68 69 #ifdef CONFIG_INTR_REMAP 70 extern int intr_remapping_enabled; 71 extern int enable_intr_remapping(int); 72 73 struct irte { 74 union { 75 struct { 76 __u64 present : 1, 77 fpd : 1, 78 dst_mode : 1, 79 redir_hint : 1, 80 trigger_mode : 1, 81 dlvry_mode : 3, 82 avail : 4, 83 __reserved_1 : 4, 84 vector : 8, 85 __reserved_2 : 8, 86 dest_id : 32; 87 }; 88 __u64 low; 89 }; 90 91 union { 92 struct { 93 __u64 sid : 16, 94 sq : 2, 95 svt : 2, 96 __reserved_3 : 44; 97 }; 98 __u64 high; 99 }; 100 }; 101 extern int get_irte(int irq, struct irte *entry); 102 extern int modify_irte(int irq, struct irte *irte_modified); 103 extern int alloc_irte(struct intel_iommu *iommu, int irq, u16 count); 104 extern int set_irte_irq(int irq, struct intel_iommu *iommu, u16 index, 105 u16 sub_handle); 106 extern int map_irq_to_irte_handle(int irq, u16 *sub_handle); 107 extern int clear_irte_irq(int irq, struct intel_iommu *iommu, u16 index); 108 extern int flush_irte(int irq); 109 extern int free_irte(int irq); 110 111 extern int irq_remapped(int irq); 112 extern struct intel_iommu *map_dev_to_ir(struct pci_dev *dev); 113 extern struct intel_iommu *map_ioapic_to_ir(int apic); 114 #else 115 #define irq_remapped(irq) (0) 116 #define enable_intr_remapping(mode) (-1) 117 #define intr_remapping_enabled (0) 118 #endif 119 120 #ifdef CONFIG_DMAR 121 extern const char *dmar_get_fault_reason(u8 fault_reason); 122 123 /* Can't use the common MSI interrupt functions 124 * since DMAR is not a pci device 125 */ 126 extern void dmar_msi_unmask(unsigned int irq); 127 extern void dmar_msi_mask(unsigned int irq); 128 extern void dmar_msi_read(int irq, struct msi_msg *msg); 129 extern void dmar_msi_write(int irq, struct msi_msg *msg); 130 extern int dmar_set_interrupt(struct intel_iommu *iommu); 131 extern int arch_setup_dmar_msi(unsigned int irq); 132 133 extern int iommu_detected, no_iommu; 134 extern struct list_head dmar_rmrr_units; 135 struct dmar_rmrr_unit { 136 struct list_head list; /* list of rmrr units */ 137 struct acpi_dmar_header *hdr; /* ACPI header */ 138 u64 base_address; /* reserved base address*/ 139 u64 end_address; /* reserved end address */ 140 struct pci_dev **devices; /* target devices */ 141 int devices_cnt; /* target device count */ 142 }; 143 144 #define for_each_rmrr_units(rmrr) \ 145 list_for_each_entry(rmrr, &dmar_rmrr_units, list) 146 /* Intel DMAR initialization functions */ 147 extern int intel_iommu_init(void); 148 extern int dmar_disabled; 149 #else 150 static inline int intel_iommu_init(void) 151 { 152 #ifdef CONFIG_INTR_REMAP 153 return dmar_dev_scope_init(); 154 #else 155 return -ENODEV; 156 #endif 157 } 158 #endif /* !CONFIG_DMAR */ 159 #endif /* __DMAR_H__ */ 160