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>
27 #include <linux/irqreturn.h>
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 */
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 #define for_each_active_iommu(i, drhd) \
48 list_for_each_entry(drhd, &dmar_drhd_units, list) \
49 if (i=drhd->iommu, drhd->ignored) {} else
51 #define for_each_iommu(i, drhd) \
52 list_for_each_entry(drhd, &dmar_drhd_units, list) \
53 if (i=drhd->iommu, 0) {} else
55 extern int dmar_table_init(void);
56 extern int dmar_dev_scope_init(void);
58 /* Intel IOMMU detection */
59 extern void detect_intel_iommu(void);
60 extern int enable_drhd_fault_handling(void);
62 extern int parse_ioapics_under_ir(void);
63 extern int alloc_iommu(struct dmar_drhd_unit *);
65 static inline void detect_intel_iommu(void)
70 static inline int dmar_table_init(void)
74 static inline int enable_drhd_fault_handling(void)
78 #endif /* !CONFIG_DMAR && !CONFIG_INTR_REMAP */
108 #ifdef CONFIG_INTR_REMAP
109 extern int intr_remapping_enabled;
110 extern int enable_intr_remapping(int);
112 extern int get_irte(int irq, struct irte *entry);
113 extern int modify_irte(int irq, struct irte *irte_modified);
114 extern int alloc_irte(struct intel_iommu *iommu, int irq, u16 count);
115 extern int set_irte_irq(int irq, struct intel_iommu *iommu, u16 index,
117 extern int map_irq_to_irte_handle(int irq, u16 *sub_handle);
118 extern int clear_irte_irq(int irq, struct intel_iommu *iommu, u16 index);
119 extern int flush_irte(int irq);
120 extern int free_irte(int irq);
122 extern int irq_remapped(int irq);
123 extern struct intel_iommu *map_dev_to_ir(struct pci_dev *dev);
124 extern struct intel_iommu *map_ioapic_to_ir(int apic);
126 static inline int alloc_irte(struct intel_iommu *iommu, int irq, u16 count)
130 static inline int modify_irte(int irq, struct irte *irte_modified)
134 static inline int free_irte(int irq)
138 static inline int map_irq_to_irte_handle(int irq, u16 *sub_handle)
142 static inline int set_irte_irq(int irq, struct intel_iommu *iommu, u16 index,
147 static inline struct intel_iommu *map_dev_to_ir(struct pci_dev *dev)
151 static inline struct intel_iommu *map_ioapic_to_ir(int apic)
155 #define irq_remapped(irq) (0)
156 #define enable_intr_remapping(mode) (-1)
157 #define intr_remapping_enabled (0)
160 /* Can't use the common MSI interrupt functions
161 * since DMAR is not a pci device
163 extern void dmar_msi_unmask(unsigned int irq);
164 extern void dmar_msi_mask(unsigned int irq);
165 extern void dmar_msi_read(int irq, struct msi_msg *msg);
166 extern void dmar_msi_write(int irq, struct msi_msg *msg);
167 extern int dmar_set_interrupt(struct intel_iommu *iommu);
168 extern irqreturn_t dmar_fault(int irq, void *dev_id);
169 extern int arch_setup_dmar_msi(unsigned int irq);
172 extern int iommu_detected, no_iommu;
173 extern struct list_head dmar_rmrr_units;
174 struct dmar_rmrr_unit {
175 struct list_head list; /* list of rmrr units */
176 struct acpi_dmar_header *hdr; /* ACPI header */
177 u64 base_address; /* reserved base address*/
178 u64 end_address; /* reserved end address */
179 struct pci_dev **devices; /* target devices */
180 int devices_cnt; /* target device count */
183 #define for_each_rmrr_units(rmrr) \
184 list_for_each_entry(rmrr, &dmar_rmrr_units, list)
185 /* Intel DMAR initialization functions */
186 extern int intel_iommu_init(void);
188 static inline int intel_iommu_init(void)
190 #ifdef CONFIG_INTR_REMAP
191 return dmar_dev_scope_init();
196 #endif /* !CONFIG_DMAR */
197 #endif /* __DMAR_H__ */