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 #define DMAR_INTR_REMAP 0x1
31 #define DMAR_X2APIC_OPT_OUT 0x2
34 #ifdef CONFIG_DMAR_TABLE
35 extern struct acpi_table_header *dmar_tbl;
36 struct dmar_drhd_unit {
37 struct list_head list; /* list of drhd units */
38 struct acpi_dmar_header *hdr; /* ACPI header */
39 u64 reg_base_addr; /* register base address*/
40 struct pci_dev **devices; /* target device array */
41 int devices_cnt; /* target device count */
42 u16 segment; /* PCI domain */
43 u8 ignored:1; /* ignore drhd */
45 struct intel_iommu *iommu;
48 extern struct list_head dmar_drhd_units;
50 #define for_each_drhd_unit(drhd) \
51 list_for_each_entry(drhd, &dmar_drhd_units, list)
53 #define for_each_active_iommu(i, drhd) \
54 list_for_each_entry(drhd, &dmar_drhd_units, list) \
55 if (i=drhd->iommu, drhd->ignored) {} else
57 #define for_each_iommu(i, drhd) \
58 list_for_each_entry(drhd, &dmar_drhd_units, list) \
59 if (i=drhd->iommu, 0) {} else
61 extern int dmar_table_init(void);
62 extern int dmar_dev_scope_init(void);
64 /* Intel IOMMU detection */
65 extern int detect_intel_iommu(void);
66 extern int enable_drhd_fault_handling(void);
68 extern int parse_ioapics_under_ir(void);
69 extern int alloc_iommu(struct dmar_drhd_unit *);
71 static inline int detect_intel_iommu(void)
76 static inline int dmar_table_init(void)
80 static inline int enable_drhd_fault_handling(void)
84 #endif /* !CONFIG_DMAR_TABLE */
115 #ifdef CONFIG_IRQ_REMAP
116 extern int intr_remapping_enabled;
117 extern int intr_remapping_supported(void);
118 extern int enable_intr_remapping(void);
119 extern void disable_intr_remapping(void);
120 extern int reenable_intr_remapping(int);
122 extern int get_irte(int irq, struct irte *entry);
123 extern int modify_irte(int irq, struct irte *irte_modified);
124 extern int alloc_irte(struct intel_iommu *iommu, int irq, u16 count);
125 extern int set_irte_irq(int irq, struct intel_iommu *iommu, u16 index,
127 extern int map_irq_to_irte_handle(int irq, u16 *sub_handle);
128 extern int free_irte(int irq);
130 extern struct intel_iommu *map_dev_to_ir(struct pci_dev *dev);
131 extern struct intel_iommu *map_ioapic_to_ir(int apic);
132 extern struct intel_iommu *map_hpet_to_ir(u8 id);
133 extern int set_ioapic_sid(struct irte *irte, int apic);
134 extern int set_hpet_sid(struct irte *irte, u8 id);
135 extern int set_msi_sid(struct irte *irte, struct pci_dev *dev);
137 static inline int alloc_irte(struct intel_iommu *iommu, int irq, u16 count)
141 static inline int modify_irte(int irq, struct irte *irte_modified)
145 static inline int free_irte(int irq)
149 static inline int map_irq_to_irte_handle(int irq, u16 *sub_handle)
153 static inline int set_irte_irq(int irq, struct intel_iommu *iommu, u16 index,
158 static inline struct intel_iommu *map_dev_to_ir(struct pci_dev *dev)
162 static inline struct intel_iommu *map_ioapic_to_ir(int apic)
166 static inline struct intel_iommu *map_hpet_to_ir(unsigned int hpet_id)
170 static inline int set_ioapic_sid(struct irte *irte, int apic)
174 static inline int set_hpet_sid(struct irte *irte, u8 id)
178 static inline int set_msi_sid(struct irte *irte, struct pci_dev *dev)
183 #define intr_remapping_enabled (0)
185 static inline int enable_intr_remapping(void)
190 static inline void disable_intr_remapping(void)
194 static inline int reenable_intr_remapping(int eim)
201 IRQ_REMAP_XAPIC_MODE,
202 IRQ_REMAP_X2APIC_MODE,
205 /* Can't use the common MSI interrupt functions
206 * since DMAR is not a pci device
209 extern void dmar_msi_unmask(struct irq_data *data);
210 extern void dmar_msi_mask(struct irq_data *data);
211 extern void dmar_msi_read(int irq, struct msi_msg *msg);
212 extern void dmar_msi_write(int irq, struct msi_msg *msg);
213 extern int dmar_set_interrupt(struct intel_iommu *iommu);
214 extern irqreturn_t dmar_fault(int irq, void *dev_id);
215 extern int arch_setup_dmar_msi(unsigned int irq);
217 #ifdef CONFIG_INTEL_IOMMU
218 extern int iommu_detected, no_iommu;
219 extern struct list_head dmar_rmrr_units;
220 struct dmar_rmrr_unit {
221 struct list_head list; /* list of rmrr units */
222 struct acpi_dmar_header *hdr; /* ACPI header */
223 u64 base_address; /* reserved base address*/
224 u64 end_address; /* reserved end address */
225 struct pci_dev **devices; /* target devices */
226 int devices_cnt; /* target device count */
229 #define for_each_rmrr_units(rmrr) \
230 list_for_each_entry(rmrr, &dmar_rmrr_units, list)
232 struct dmar_atsr_unit {
233 struct list_head list; /* list of ATSR units */
234 struct acpi_dmar_header *hdr; /* ACPI header */
235 struct pci_dev **devices; /* target devices */
236 int devices_cnt; /* target device count */
237 u8 include_all:1; /* include all ports */
240 int dmar_parse_rmrr_atsr_dev(void);
241 extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header);
242 extern int dmar_parse_one_atsr(struct acpi_dmar_header *header);
243 extern int dmar_parse_dev_scope(void *start, void *end, int *cnt,
244 struct pci_dev ***devices, u16 segment);
245 extern int intel_iommu_init(void);
246 #else /* !CONFIG_INTEL_IOMMU: */
247 static inline int intel_iommu_init(void) { return -ENODEV; }
248 static inline int dmar_parse_one_rmrr(struct acpi_dmar_header *header)
252 static inline int dmar_parse_one_atsr(struct acpi_dmar_header *header)
256 static inline int dmar_parse_rmrr_atsr_dev(void)
260 #endif /* CONFIG_INTEL_IOMMU */
262 #endif /* __DMAR_H__ */