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.
24 #include <linux/acpi.h>
25 #include <linux/types.h>
26 #include <linux/msi.h>
27 #include <linux/irqreturn.h>
28 #include <linux/rwsem.h>
29 #include <linux/rcupdate.h>
31 struct acpi_dmar_header;
34 #define DMAR_INTR_REMAP 0x1
35 #define DMAR_X2APIC_OPT_OUT 0x2
39 struct dmar_dev_scope {
40 struct device __rcu *dev;
45 #ifdef CONFIG_DMAR_TABLE
46 extern struct acpi_table_header *dmar_tbl;
47 struct dmar_drhd_unit {
48 struct list_head list; /* list of drhd units */
49 struct acpi_dmar_header *hdr; /* ACPI header */
50 u64 reg_base_addr; /* register base address*/
51 struct dmar_dev_scope *devices;/* target device array */
52 int devices_cnt; /* target device count */
53 u16 segment; /* PCI domain */
54 u8 ignored:1; /* ignore drhd */
56 struct intel_iommu *iommu;
59 struct dmar_pci_notify_info {
65 struct acpi_dmar_pci_path path[];
66 } __attribute__((packed));
68 extern struct rw_semaphore dmar_global_lock;
69 extern struct list_head dmar_drhd_units;
71 #define for_each_drhd_unit(drhd) \
72 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list)
74 #define for_each_active_drhd_unit(drhd) \
75 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
76 if (drhd->ignored) {} else
78 #define for_each_active_iommu(i, drhd) \
79 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
80 if (i=drhd->iommu, drhd->ignored) {} else
82 #define for_each_iommu(i, drhd) \
83 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
84 if (i=drhd->iommu, 0) {} else
86 static inline bool dmar_rcu_check(void)
88 return rwsem_is_locked(&dmar_global_lock) ||
89 system_state == SYSTEM_BOOTING;
92 #define dmar_rcu_dereference(p) rcu_dereference_check((p), dmar_rcu_check())
94 #define for_each_dev_scope(a, c, p, d) \
95 for ((p) = 0; ((d) = (p) < (c) ? dmar_rcu_dereference((a)[(p)].dev) : \
96 NULL, (p) < (c)); (p)++)
98 #define for_each_active_dev_scope(a, c, p, d) \
99 for_each_dev_scope((a), (c), (p), (d)) if (!(d)) { continue; } else
101 extern int dmar_table_init(void);
102 extern int dmar_dev_scope_init(void);
103 extern int dmar_parse_dev_scope(void *start, void *end, int *cnt,
104 struct dmar_dev_scope **devices, u16 segment);
105 extern void *dmar_alloc_dev_scope(void *start, void *end, int *cnt);
106 extern void dmar_free_dev_scope(struct dmar_dev_scope **devices, int *cnt);
107 extern int dmar_insert_dev_scope(struct dmar_pci_notify_info *info,
108 void *start, void*end, u16 segment,
109 struct dmar_dev_scope *devices,
111 extern int dmar_remove_dev_scope(struct dmar_pci_notify_info *info,
112 u16 segment, struct dmar_dev_scope *devices,
114 /* Intel IOMMU detection */
115 extern int detect_intel_iommu(void);
116 extern int enable_drhd_fault_handling(void);
118 struct dmar_pci_notify_info;
119 static inline int detect_intel_iommu(void)
124 static inline int dmar_table_init(void)
128 static inline int enable_drhd_fault_handling(void)
132 #endif /* !CONFIG_DMAR_TABLE */
164 IRQ_REMAP_XAPIC_MODE,
165 IRQ_REMAP_X2APIC_MODE,
168 /* Can't use the common MSI interrupt functions
169 * since DMAR is not a pci device
172 extern void dmar_msi_unmask(struct irq_data *data);
173 extern void dmar_msi_mask(struct irq_data *data);
174 extern void dmar_msi_read(int irq, struct msi_msg *msg);
175 extern void dmar_msi_write(int irq, struct msi_msg *msg);
176 extern int dmar_set_interrupt(struct intel_iommu *iommu);
177 extern irqreturn_t dmar_fault(int irq, void *dev_id);
178 extern int arch_setup_dmar_msi(unsigned int irq);
180 #ifdef CONFIG_INTEL_IOMMU
181 extern int iommu_detected, no_iommu;
182 extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header);
183 extern int dmar_parse_one_atsr(struct acpi_dmar_header *header);
184 extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info);
185 extern int intel_iommu_init(void);
186 #else /* !CONFIG_INTEL_IOMMU: */
187 static inline int intel_iommu_init(void) { return -ENODEV; }
188 static inline int dmar_parse_one_rmrr(struct acpi_dmar_header *header)
192 static inline int dmar_parse_one_atsr(struct acpi_dmar_header *header)
196 static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)
200 #endif /* CONFIG_INTEL_IOMMU */
202 #endif /* __DMAR_H__ */