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>
29 struct acpi_dmar_header;
32 #define DMAR_INTR_REMAP 0x1
33 #define DMAR_X2APIC_OPT_OUT 0x2
37 #ifdef CONFIG_DMAR_TABLE
38 extern struct acpi_table_header *dmar_tbl;
39 struct dmar_drhd_unit {
40 struct list_head list; /* list of drhd units */
41 struct acpi_dmar_header *hdr; /* ACPI header */
42 u64 reg_base_addr; /* register base address*/
43 struct pci_dev **devices; /* target device array */
44 int devices_cnt; /* target device count */
45 u16 segment; /* PCI domain */
46 u8 ignored:1; /* ignore drhd */
48 struct intel_iommu *iommu;
51 extern struct list_head dmar_drhd_units;
53 #define for_each_drhd_unit(drhd) \
54 list_for_each_entry(drhd, &dmar_drhd_units, list)
56 #define for_each_active_drhd_unit(drhd) \
57 list_for_each_entry(drhd, &dmar_drhd_units, list) \
58 if (drhd->ignored) {} else
60 #define for_each_active_iommu(i, drhd) \
61 list_for_each_entry(drhd, &dmar_drhd_units, list) \
62 if (i=drhd->iommu, drhd->ignored) {} else
64 #define for_each_iommu(i, drhd) \
65 list_for_each_entry(drhd, &dmar_drhd_units, list) \
66 if (i=drhd->iommu, 0) {} else
68 extern int dmar_table_init(void);
69 extern int dmar_dev_scope_init(void);
70 extern int dmar_parse_dev_scope(void *start, void *end, int *cnt,
71 struct pci_dev ***devices, u16 segment);
72 extern void *dmar_alloc_dev_scope(void *start, void *end, int *cnt);
73 extern void dmar_free_dev_scope(struct pci_dev ***devices, int *cnt);
75 /* Intel IOMMU detection */
76 extern int detect_intel_iommu(void);
77 extern int enable_drhd_fault_handling(void);
79 static inline int detect_intel_iommu(void)
84 static inline int dmar_table_init(void)
88 static inline int enable_drhd_fault_handling(void)
92 #endif /* !CONFIG_DMAR_TABLE */
124 IRQ_REMAP_XAPIC_MODE,
125 IRQ_REMAP_X2APIC_MODE,
128 /* Can't use the common MSI interrupt functions
129 * since DMAR is not a pci device
132 extern void dmar_msi_unmask(struct irq_data *data);
133 extern void dmar_msi_mask(struct irq_data *data);
134 extern void dmar_msi_read(int irq, struct msi_msg *msg);
135 extern void dmar_msi_write(int irq, struct msi_msg *msg);
136 extern int dmar_set_interrupt(struct intel_iommu *iommu);
137 extern irqreturn_t dmar_fault(int irq, void *dev_id);
138 extern int arch_setup_dmar_msi(unsigned int irq);
140 #ifdef CONFIG_INTEL_IOMMU
141 extern int iommu_detected, no_iommu;
142 extern int dmar_parse_rmrr_atsr_dev(void);
143 extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header);
144 extern int dmar_parse_one_atsr(struct acpi_dmar_header *header);
145 extern int intel_iommu_init(void);
146 #else /* !CONFIG_INTEL_IOMMU: */
147 static inline int intel_iommu_init(void) { return -ENODEV; }
148 static inline int dmar_parse_one_rmrr(struct acpi_dmar_header *header)
152 static inline int dmar_parse_one_atsr(struct acpi_dmar_header *header)
156 static inline int dmar_parse_rmrr_atsr_dev(void)
160 #endif /* CONFIG_INTEL_IOMMU */
162 #endif /* __DMAR_H__ */