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 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 #ifdef CONFIG_INTEL_IOMMU
119 extern int iommu_detected
, no_iommu
;
120 extern int intel_iommu_init(void);
121 extern int dmar_parse_one_rmrr(struct acpi_dmar_header
*header
);
122 extern int dmar_parse_one_atsr(struct acpi_dmar_header
*header
);
123 extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info
*info
);
124 #else /* !CONFIG_INTEL_IOMMU: */
125 static inline int intel_iommu_init(void) { return -ENODEV
; }
126 static inline int dmar_parse_one_rmrr(struct acpi_dmar_header
*header
)
130 static inline int dmar_parse_one_atsr(struct acpi_dmar_header
*header
)
134 static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info
*info
)
138 #endif /* CONFIG_INTEL_IOMMU */
140 #endif /* CONFIG_DMAR_TABLE */
172 IRQ_REMAP_XAPIC_MODE
,
173 IRQ_REMAP_X2APIC_MODE
,
176 /* Can't use the common MSI interrupt functions
177 * since DMAR is not a pci device
180 extern void dmar_msi_unmask(struct irq_data
*data
);
181 extern void dmar_msi_mask(struct irq_data
*data
);
182 extern void dmar_msi_read(int irq
, struct msi_msg
*msg
);
183 extern void dmar_msi_write(int irq
, struct msi_msg
*msg
);
184 extern int dmar_set_interrupt(struct intel_iommu
*iommu
);
185 extern irqreturn_t
dmar_fault(int irq
, void *dev_id
);
186 extern int arch_setup_dmar_msi(unsigned int irq
);
188 #endif /* __DMAR_H__ */