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 #if defined(CONFIG_DMAR) || defined(CONFIG_INTR_REMAP)
  30 struct intel_iommu;
  31
  32 struct dmar_drhd_unit {
  33         struct list_head list;          /* list of drhd units   */
  34         struct  acpi_dmar_header *hdr;  /* ACPI header          */
  35         u64     reg_base_addr;          /* register base address*/
  36         struct  pci_dev **devices;      /* target device array  */
  37         int     devices_cnt;            /* target device count  */
  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 extern int dmar_table_init(void);
  49 extern int dmar_dev_scope_init(void);
  50
  51 /* Intel IOMMU detection */
  52 extern void detect_intel_iommu(void);
  53 extern int enable_drhd_fault_handling(void);
  54
  55
  56 extern int parse_ioapics_under_ir(void);
  57 extern int alloc_iommu(struct dmar_drhd_unit *);
  58 #else
  59 static inline void detect_intel_iommu(void)
  60 {
  61         return;
  62 }
  63
  64 static inline int dmar_table_init(void)
  65 {
  66         return -ENODEV;
  67 }
  68 #endif /* !CONFIG_DMAR && !CONFIG_INTR_REMAP */
  69
  70 #ifdef CONFIG_INTR_REMAP
  71 extern int intr_remapping_enabled;
  72 extern int enable_intr_remapping(int);
  73
  74 struct irte {
  75         union {
  76                 struct {
  77                         __u64   present         : 1,
  78                                 fpd             : 1,
  79                                 dst_mode        : 1,
  80                                 redir_hint      : 1,
  81                                 trigger_mode    : 1,
  82                                 dlvry_mode      : 3,
  83                                 avail           : 4,
  84                                 __reserved_1    : 4,
  85                                 vector          : 8,
  86                                 __reserved_2    : 8,
  87                                 dest_id         : 32;
  88                 };
  89                 __u64 low;
  90         };
  91
  92         union {
  93                 struct {
  94                         __u64   sid             : 16,
  95                                 sq              : 2,
  96                                 svt             : 2,
  97                                 __reserved_3    : 44;
  98                 };
  99                 __u64 high;
 100         };
 101 };
 102 extern int get_irte(int irq, struct irte *entry);
 103 extern int modify_irte(int irq, struct irte *irte_modified);
 104 extern int alloc_irte(struct intel_iommu *iommu, int irq, u16 count);
 105 extern int set_irte_irq(int irq, struct intel_iommu *iommu, u16 index,
 106                         u16 sub_handle);
 107 extern int map_irq_to_irte_handle(int irq, u16 *sub_handle);
 108 extern int clear_irte_irq(int irq, struct intel_iommu *iommu, u16 index);
 109 extern int flush_irte(int irq);
 110 extern int free_irte(int irq);
 111
 112 extern int irq_remapped(int irq);
 113 extern struct intel_iommu *map_dev_to_ir(struct pci_dev *dev);
 114 extern struct intel_iommu *map_ioapic_to_ir(int apic);
 115 #else
 116 #define irq_remapped(irq)               (0)
 117 #define enable_intr_remapping(mode)     (-1)
 118 #define intr_remapping_enabled          (0)
 119 #endif
 120
 121 /* Can't use the common MSI interrupt functions
 122  * since DMAR is not a pci device
 123  */
 124 extern void dmar_msi_unmask(unsigned int irq);
 125 extern void dmar_msi_mask(unsigned int irq);
 126 extern void dmar_msi_read(int irq, struct msi_msg *msg);
 127 extern void dmar_msi_write(int irq, struct msi_msg *msg);
 128 extern int dmar_set_interrupt(struct intel_iommu *iommu);
 129 extern irqreturn_t dmar_fault(int irq, void *dev_id);
 130 extern int arch_setup_dmar_msi(unsigned int irq);
 131
 132 #ifdef CONFIG_DMAR
 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 #else
 149 static inline int intel_iommu_init(void)
 150 {
 151 #ifdef CONFIG_INTR_REMAP
 152         return dmar_dev_scope_init();
 153 #else
 154         return -ENODEV;
 155 #endif
 156 }
 157 #endif /* !CONFIG_DMAR */
 158 #endif /* __DMAR_H__ */