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         u16     segment;                /* PCI domain           */
  38         u8      ignored:1;              /* ignore drhd          */
  39         u8      include_all:1;
  40         struct intel_iommu *iommu;
  41 };
  42
  43 extern struct list_head dmar_drhd_units;
  44
  45 #define for_each_drhd_unit(drhd) \
  46         list_for_each_entry(drhd, &dmar_drhd_units, list)
  47
  48 #define for_each_active_iommu(i, drhd)                                  \
  49         list_for_each_entry(drhd, &dmar_drhd_units, list)               \
  50                 if (i=drhd->iommu, drhd->ignored) {} else
  51
  52 #define for_each_iommu(i, drhd)                                         \
  53         list_for_each_entry(drhd, &dmar_drhd_units, list)               \
  54                 if (i=drhd->iommu, 0) {} else
  55
  56 extern int dmar_table_init(void);
  57 extern int dmar_dev_scope_init(void);
  58
  59 /* Intel IOMMU detection */
  60 extern void detect_intel_iommu(void);
  61 extern int enable_drhd_fault_handling(void);
  62
  63 extern int parse_ioapics_under_ir(void);
  64 extern int alloc_iommu(struct dmar_drhd_unit *);
  65 #else
  66 static inline void detect_intel_iommu(void)
  67 {
  68         return;
  69 }
  70
  71 static inline int dmar_table_init(void)
  72 {
  73         return -ENODEV;
  74 }
  75 static inline int enable_drhd_fault_handling(void)
  76 {
  77         return -1;
  78 }
  79 #endif /* !CONFIG_DMAR && !CONFIG_INTR_REMAP */
  80
  81 struct irte {
  82         union {
  83                 struct {
  84                         __u64   present         : 1,
  85                                 fpd             : 1,
  86                                 dst_mode        : 1,
  87                                 redir_hint      : 1,
  88                                 trigger_mode    : 1,
  89                                 dlvry_mode      : 3,
  90                                 avail           : 4,
  91                                 __reserved_1    : 4,
  92                                 vector          : 8,
  93                                 __reserved_2    : 8,
  94                                 dest_id         : 32;
  95                 };
  96                 __u64 low;
  97         };
  98
  99         union {
 100                 struct {
 101                         __u64   sid             : 16,
 102                                 sq              : 2,
 103                                 svt             : 2,
 104                                 __reserved_3    : 44;
 105                 };
 106                 __u64 high;
 107         };
 108 };
 109 #ifdef CONFIG_INTR_REMAP
 110 extern int intr_remapping_enabled;
 111 extern int intr_remapping_supported(void);
 112 extern int enable_intr_remapping(int);
 113 extern void disable_intr_remapping(void);
 114 extern int reenable_intr_remapping(int);
 115
 116 extern int get_irte(int irq, struct irte *entry);
 117 extern int modify_irte(int irq, struct irte *irte_modified);
 118 extern int alloc_irte(struct intel_iommu *iommu, int irq, u16 count);
 119 extern int set_irte_irq(int irq, struct intel_iommu *iommu, u16 index,
 120                         u16 sub_handle);
 121 extern int map_irq_to_irte_handle(int irq, u16 *sub_handle);
 122 extern int clear_irte_irq(int irq, struct intel_iommu *iommu, u16 index);
 123 extern int flush_irte(int irq);
 124 extern int free_irte(int irq);
 125
 126 extern int irq_remapped(int irq);
 127 extern struct intel_iommu *map_dev_to_ir(struct pci_dev *dev);
 128 extern struct intel_iommu *map_ioapic_to_ir(int apic);
 129 #else
 130 static inline int alloc_irte(struct intel_iommu *iommu, int irq, u16 count)
 131 {
 132         return -1;
 133 }
 134 static inline int modify_irte(int irq, struct irte *irte_modified)
 135 {
 136         return -1;
 137 }
 138 static inline int free_irte(int irq)
 139 {
 140         return -1;
 141 }
 142 static inline int map_irq_to_irte_handle(int irq, u16 *sub_handle)
 143 {
 144         return -1;
 145 }
 146 static inline int set_irte_irq(int irq, struct intel_iommu *iommu, u16 index,
 147                                u16 sub_handle)
 148 {
 149         return -1;
 150 }
 151 static inline struct intel_iommu *map_dev_to_ir(struct pci_dev *dev)
 152 {
 153         return NULL;
 154 }
 155 static inline struct intel_iommu *map_ioapic_to_ir(int apic)
 156 {
 157         return NULL;
 158 }
 159 #define irq_remapped(irq)               (0)
 160 #define enable_intr_remapping(mode)     (-1)
 161 #define disable_intr_remapping()        (0)
 162 #define reenable_intr_remapping(mode)   (0)
 163 #define intr_remapping_enabled          (0)
 164 #endif
 165
 166 /* Can't use the common MSI interrupt functions
 167  * since DMAR is not a pci device
 168  */
 169 extern void dmar_msi_unmask(unsigned int irq);
 170 extern void dmar_msi_mask(unsigned int irq);
 171 extern void dmar_msi_read(int irq, struct msi_msg *msg);
 172 extern void dmar_msi_write(int irq, struct msi_msg *msg);
 173 extern int dmar_set_interrupt(struct intel_iommu *iommu);
 174 extern irqreturn_t dmar_fault(int irq, void *dev_id);
 175 extern int arch_setup_dmar_msi(unsigned int irq);
 176
 177 #ifdef CONFIG_DMAR
 178 extern int iommu_detected, no_iommu;
 179 extern struct list_head dmar_rmrr_units;
 180 struct dmar_rmrr_unit {
 181         struct list_head list;          /* list of rmrr units   */
 182         struct acpi_dmar_header *hdr;   /* ACPI header          */
 183         u64     base_address;           /* reserved base address*/
 184         u64     end_address;            /* reserved end address */
 185         struct pci_dev **devices;       /* target devices */
 186         int     devices_cnt;            /* target device count */
 187 };
 188
 189 #define for_each_rmrr_units(rmrr) \
 190         list_for_each_entry(rmrr, &dmar_rmrr_units, list)
 191 /* Intel DMAR  initialization functions */
 192 extern int intel_iommu_init(void);
 193 #else
 194 static inline int intel_iommu_init(void)
 195 {
 196 #ifdef CONFIG_INTR_REMAP
 197         return dmar_dev_scope_init();
 198 #else
 199         return -ENODEV;
 200 #endif
 201 }
 202 #endif /* !CONFIG_DMAR */
 203 #endif /* __DMAR_H__ */