include/linux/dmar.h

   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 <ashok.raj@intel.com>
  18  * Copyright (C) Shaohua Li <shaohua.li@intel.com>
  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 #include <linux/irqreturn.h>
  28
  29 struct intel_iommu;
  30 #if defined(CONFIG_DMAR) || defined(CONFIG_INTR_REMAP)
  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 dmar_dev_scope_init(void);
  49
  50 /* Intel IOMMU detection */
  51 extern void detect_intel_iommu(void);
  52 extern int enable_drhd_fault_handling(void);
  53
  54 extern int parse_ioapics_under_ir(void);
  55 extern int alloc_iommu(struct dmar_drhd_unit *);
  56 #else
  57 static inline void detect_intel_iommu(void)
  58 {
  59         return;
  60 }
  61
  62 static inline int dmar_table_init(void)
  63 {
  64         return -ENODEV;
  65 }
  66 static inline int enable_drhd_fault_handling(void)
  67 {
  68         return -1;
  69 }
  70 #endif /* !CONFIG_DMAR && !CONFIG_INTR_REMAP */
  71
  72 struct irte {
  73         union {
  74                 struct {
  75                         __u64   present         : 1,
  76                                 fpd             : 1,
  77                                 dst_mode        : 1,
  78                                 redir_hint      : 1,
  79                                 trigger_mode    : 1,
  80                                 dlvry_mode      : 3,
  81                                 avail           : 4,
  82                                 __reserved_1    : 4,
  83                                 vector          : 8,
  84                                 __reserved_2    : 8,
  85                                 dest_id         : 32;
  86                 };
  87                 __u64 low;
  88         };
  89
  90         union {
  91                 struct {
  92                         __u64   sid             : 16,
  93                                 sq              : 2,
  94                                 svt             : 2,
  95                                 __reserved_3    : 44;
  96                 };
  97                 __u64 high;
  98         };
  99 };
 100 #ifdef CONFIG_INTR_REMAP
 101 extern int intr_remapping_enabled;
 102 extern int enable_intr_remapping(int);
 103
 104 extern int get_irte(int irq, struct irte *entry);
 105 extern int modify_irte(int irq, struct irte *irte_modified);
 106 extern int alloc_irte(struct intel_iommu *iommu, int irq, u16 count);
 107 extern int set_irte_irq(int irq, struct intel_iommu *iommu, u16 index,
 108                         u16 sub_handle);
 109 extern int map_irq_to_irte_handle(int irq, u16 *sub_handle);
 110 extern int clear_irte_irq(int irq, struct intel_iommu *iommu, u16 index);
 111 extern int flush_irte(int irq);
 112 extern int free_irte(int irq);
 113
 114 extern int irq_remapped(int irq);
 115 extern struct intel_iommu *map_dev_to_ir(struct pci_dev *dev);
 116 extern struct intel_iommu *map_ioapic_to_ir(int apic);
 117 #else
 118 static inline int alloc_irte(struct intel_iommu *iommu, int irq, u16 count)
 119 {
 120         return -1;
 121 }
 122 static inline int modify_irte(int irq, struct irte *irte_modified)
 123 {
 124         return -1;
 125 }
 126 static inline int free_irte(int irq)
 127 {
 128         return -1;
 129 }
 130 static inline int map_irq_to_irte_handle(int irq, u16 *sub_handle)
 131 {
 132         return -1;
 133 }
 134 static inline int set_irte_irq(int irq, struct intel_iommu *iommu, u16 index,
 135                                u16 sub_handle)
 136 {
 137         return -1;
 138 }
 139 static inline struct intel_iommu *map_dev_to_ir(struct pci_dev *dev)
 140 {
 141         return NULL;
 142 }
 143 static inline struct intel_iommu *map_ioapic_to_ir(int apic)
 144 {
 145         return NULL;
 146 }
 147 #define irq_remapped(irq)               (0)
 148 #define enable_intr_remapping(mode)     (-1)
 149 #define intr_remapping_enabled          (0)
 150 #endif
 151
 152 /* Can't use the common MSI interrupt functions
 153  * since DMAR is not a pci device
 154  */
 155 extern void dmar_msi_unmask(unsigned int irq);
 156 extern void dmar_msi_mask(unsigned int irq);
 157 extern void dmar_msi_read(int irq, struct msi_msg *msg);
 158 extern void dmar_msi_write(int irq, struct msi_msg *msg);
 159 extern int dmar_set_interrupt(struct intel_iommu *iommu);
 160 extern irqreturn_t dmar_fault(int irq, void *dev_id);
 161 extern int arch_setup_dmar_msi(unsigned int irq);
 162
 163 #ifdef CONFIG_DMAR
 164 extern int iommu_detected, no_iommu;
 165 extern struct list_head dmar_rmrr_units;
 166 struct dmar_rmrr_unit {
 167         struct list_head list;          /* list of rmrr units   */
 168         struct acpi_dmar_header *hdr;   /* ACPI header          */
 169         u64     base_address;           /* reserved base address*/
 170         u64     end_address;            /* reserved end address */
 171         struct pci_dev **devices;       /* target devices */
 172         int     devices_cnt;            /* target device count */
 173 };
 174
 175 #define for_each_rmrr_units(rmrr) \
 176         list_for_each_entry(rmrr, &dmar_rmrr_units, list)
 177 /* Intel DMAR  initialization functions */
 178 extern int intel_iommu_init(void);
 179 #else
 180 static inline int intel_iommu_init(void)
 181 {
 182 #ifdef CONFIG_INTR_REMAP
 183         return dmar_dev_scope_init();
 184 #else
 185         return -ENODEV;
 186 #endif
 187 }
 188 #endif /* !CONFIG_DMAR */
 189 #endif /* __DMAR_H__ */