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_path {
65 struct dmar_pci_notify_info {
71 struct dmar_pci_path path[];
72 } __attribute__((packed));
74 extern struct rw_semaphore dmar_global_lock;
75 extern struct list_head dmar_drhd_units;
77 #define for_each_drhd_unit(drhd) \
78 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list)
80 #define for_each_active_drhd_unit(drhd) \
81 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
82 if (drhd->ignored) {} else
84 #define for_each_active_iommu(i, drhd) \
85 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
86 if (i=drhd->iommu, drhd->ignored) {} else
88 #define for_each_iommu(i, drhd) \
89 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
90 if (i=drhd->iommu, 0) {} else
92 static inline bool dmar_rcu_check(void)
94 return rwsem_is_locked(&dmar_global_lock) ||
95 system_state == SYSTEM_BOOTING;
98 #define dmar_rcu_dereference(p) rcu_dereference_check((p), dmar_rcu_check())
100 #define for_each_dev_scope(a, c, p, d) \
101 for ((p) = 0; ((d) = (p) < (c) ? dmar_rcu_dereference((a)[(p)].dev) : \
102 NULL, (p) < (c)); (p)++)
104 #define for_each_active_dev_scope(a, c, p, d) \
105 for_each_dev_scope((a), (c), (p), (d)) if (!(d)) { continue; } else
107 extern int dmar_table_init(void);
108 extern int dmar_dev_scope_init(void);
109 extern int dmar_parse_dev_scope(void *start, void *end, int *cnt,
110 struct dmar_dev_scope **devices, u16 segment);
111 extern void *dmar_alloc_dev_scope(void *start, void *end, int *cnt);
112 extern void dmar_free_dev_scope(struct dmar_dev_scope **devices, int *cnt);
113 extern int dmar_insert_dev_scope(struct dmar_pci_notify_info *info,
114 void *start, void*end, u16 segment,
115 struct dmar_dev_scope *devices,
117 extern int dmar_remove_dev_scope(struct dmar_pci_notify_info *info,
118 u16 segment, struct dmar_dev_scope *devices,
120 /* Intel IOMMU detection */
121 extern int detect_intel_iommu(void);
122 extern int enable_drhd_fault_handling(void);
124 #ifdef CONFIG_INTEL_IOMMU
125 extern int iommu_detected, no_iommu;
126 extern int intel_iommu_init(void);
127 extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header);
128 extern int dmar_parse_one_atsr(struct acpi_dmar_header *header);
129 extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info);
130 #else /* !CONFIG_INTEL_IOMMU: */
131 static inline int intel_iommu_init(void) { return -ENODEV; }
132 static inline int dmar_parse_one_rmrr(struct acpi_dmar_header *header)
136 static inline int dmar_parse_one_atsr(struct acpi_dmar_header *header)
140 static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)
144 #endif /* CONFIG_INTEL_IOMMU */
146 #endif /* CONFIG_DMAR_TABLE */
178 IRQ_REMAP_XAPIC_MODE,
179 IRQ_REMAP_X2APIC_MODE,
182 /* Can't use the common MSI interrupt functions
183 * since DMAR is not a pci device
186 extern void dmar_msi_unmask(struct irq_data *data);
187 extern void dmar_msi_mask(struct irq_data *data);
188 extern void dmar_msi_read(int irq, struct msi_msg *msg);
189 extern void dmar_msi_write(int irq, struct msi_msg *msg);
190 extern int dmar_set_interrupt(struct intel_iommu *iommu);
191 extern irqreturn_t dmar_fault(int irq, void *dev_id);
192 extern int arch_setup_dmar_msi(unsigned int irq);
194 #endif /* __DMAR_H__ */