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>
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 #ifdef CONFIG_DMAR_TABLE
40 extern struct acpi_table_header
*dmar_tbl
;
41 struct dmar_drhd_unit
{
42 struct list_head list
; /* list of drhd units */
43 struct acpi_dmar_header
*hdr
; /* ACPI header */
44 u64 reg_base_addr
; /* register base address*/
45 struct pci_dev __rcu
**devices
;/* target device array */
46 int devices_cnt
; /* target device count */
47 u16 segment
; /* PCI domain */
48 u8 ignored
:1; /* ignore drhd */
50 struct intel_iommu
*iommu
;
53 struct dmar_pci_notify_info
{
59 struct acpi_dmar_pci_path path
[];
60 } __attribute__((packed
));
62 extern struct rw_semaphore dmar_global_lock
;
63 extern struct list_head dmar_drhd_units
;
65 #define for_each_drhd_unit(drhd) \
66 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list)
68 #define for_each_active_drhd_unit(drhd) \
69 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
70 if (drhd->ignored) {} else
72 #define for_each_active_iommu(i, drhd) \
73 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
74 if (i=drhd->iommu, drhd->ignored) {} else
76 #define for_each_iommu(i, drhd) \
77 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
78 if (i=drhd->iommu, 0) {} else
80 static inline bool dmar_rcu_check(void)
82 return rwsem_is_locked(&dmar_global_lock
) ||
83 system_state
== SYSTEM_BOOTING
;
86 #define dmar_rcu_dereference(p) rcu_dereference_check((p), dmar_rcu_check())
88 #define for_each_dev_scope(a, c, p, d) \
89 for ((p) = 0; ((d) = (p) < (c) ? dmar_rcu_dereference((a)[(p)]) : \
90 NULL, (p) < (c)); (p)++)
92 #define for_each_active_dev_scope(a, c, p, d) \
93 for_each_dev_scope((a), (c), (p), (d)) if (!(d)) { continue; } else
95 extern int dmar_table_init(void);
96 extern int dmar_dev_scope_init(void);
97 extern int dmar_parse_dev_scope(void *start
, void *end
, int *cnt
,
98 struct pci_dev
***devices
, u16 segment
);
99 extern void *dmar_alloc_dev_scope(void *start
, void *end
, int *cnt
);
100 extern void dmar_free_dev_scope(struct pci_dev __rcu
***devices
, int *cnt
);
101 extern int dmar_insert_dev_scope(struct dmar_pci_notify_info
*info
,
102 void *start
, void*end
, u16 segment
,
103 struct pci_dev __rcu
**devices
,
105 extern int dmar_remove_dev_scope(struct dmar_pci_notify_info
*info
,
106 u16 segment
, struct pci_dev __rcu
**devices
,
108 /* Intel IOMMU detection */
109 extern int detect_intel_iommu(void);
110 extern int enable_drhd_fault_handling(void);
112 struct dmar_pci_notify_info
;
113 static inline int detect_intel_iommu(void)
118 static inline int dmar_table_init(void)
122 static inline int enable_drhd_fault_handling(void)
126 #endif /* !CONFIG_DMAR_TABLE */
158 IRQ_REMAP_XAPIC_MODE
,
159 IRQ_REMAP_X2APIC_MODE
,
162 /* Can't use the common MSI interrupt functions
163 * since DMAR is not a pci device
166 extern void dmar_msi_unmask(struct irq_data
*data
);
167 extern void dmar_msi_mask(struct irq_data
*data
);
168 extern void dmar_msi_read(int irq
, struct msi_msg
*msg
);
169 extern void dmar_msi_write(int irq
, struct msi_msg
*msg
);
170 extern int dmar_set_interrupt(struct intel_iommu
*iommu
);
171 extern irqreturn_t
dmar_fault(int irq
, void *dev_id
);
172 extern int arch_setup_dmar_msi(unsigned int irq
);
174 #ifdef CONFIG_INTEL_IOMMU
175 extern int iommu_detected
, no_iommu
;
176 extern int dmar_parse_one_rmrr(struct acpi_dmar_header
*header
);
177 extern int dmar_parse_one_atsr(struct acpi_dmar_header
*header
);
178 extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info
*info
);
179 extern int intel_iommu_init(void);
180 #else /* !CONFIG_INTEL_IOMMU: */
181 static inline int intel_iommu_init(void) { return -ENODEV
; }
182 static inline int dmar_parse_one_rmrr(struct acpi_dmar_header
*header
)
186 static inline int dmar_parse_one_atsr(struct acpi_dmar_header
*header
)
190 static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info
*info
)
194 #endif /* CONFIG_INTEL_IOMMU */
196 #endif /* __DMAR_H__ */