2 * Copyright (c) 2006, Intel Corporation.
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.
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
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.
17 * Copyright (C) Ashok Raj <ashok.raj@intel.com>
18 * Copyright (C) Shaohua Li <shaohua.li@intel.com>
24 #include <linux/acpi.h>
25 #include <linux/types.h>
26 #include <linux/msi.h>
28 #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 */
39 struct intel_iommu *iommu;
42 extern struct list_head dmar_drhd_units;
44 #define for_each_drhd_unit(drhd) \
45 list_for_each_entry(drhd, &dmar_drhd_units, list)
47 extern int dmar_table_init(void);
48 extern int early_dmar_detect(void);
49 extern int dmar_dev_scope_init(void);
51 /* Intel IOMMU detection */
52 extern void detect_intel_iommu(void);
55 extern int parse_ioapics_under_ir(void);
56 extern int alloc_iommu(struct dmar_drhd_unit *);
58 static inline void detect_intel_iommu(void)
63 static inline int dmar_table_init(void)
67 #endif /* !CONFIG_DMAR && !CONFIG_INTR_REMAP */
69 #ifdef CONFIG_INTR_REMAP
70 extern int intr_remapping_enabled;
71 extern int enable_intr_remapping(int);
102 #define enable_intr_remapping(mode) (-1)
103 #define intr_remapping_enabled (0)
107 extern const char *dmar_get_fault_reason(u8 fault_reason);
109 /* Can't use the common MSI interrupt functions
110 * since DMAR is not a pci device
112 extern void dmar_msi_unmask(unsigned int irq);
113 extern void dmar_msi_mask(unsigned int irq);
114 extern void dmar_msi_read(int irq, struct msi_msg *msg);
115 extern void dmar_msi_write(int irq, struct msi_msg *msg);
116 extern int dmar_set_interrupt(struct intel_iommu *iommu);
117 extern int arch_setup_dmar_msi(unsigned int irq);
119 extern int iommu_detected, no_iommu;
120 extern struct list_head dmar_rmrr_units;
121 struct dmar_rmrr_unit {
122 struct list_head list; /* list of rmrr units */
123 struct acpi_dmar_header *hdr; /* ACPI header */
124 u64 base_address; /* reserved base address*/
125 u64 end_address; /* reserved end address */
126 struct pci_dev **devices; /* target devices */
127 int devices_cnt; /* target device count */
130 #define for_each_rmrr_units(rmrr) \
131 list_for_each_entry(rmrr, &dmar_rmrr_units, list)
132 /* Intel DMAR initialization functions */
133 extern int intel_iommu_init(void);
134 extern int dmar_disabled;
136 static inline int intel_iommu_init(void)
138 #ifdef CONFIG_INTR_REMAP
139 return dmar_dev_scope_init();
144 #endif /* !CONFIG_DMAR */
145 #endif /* __DMAR_H__ */