Linux kernel mirror (for testing)
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linux
1/*
2 * Copyright (c) 2006, Intel Corporation.
3 *
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.
7 *
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
11 * more details.
12 *
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.
16 *
17 * Copyright (C) Ashok Raj <ashok.raj@intel.com>
18 * Copyright (C) Shaohua Li <shaohua.li@intel.com>
19 */
20
21#ifndef __DMAR_H__
22#define __DMAR_H__
23
24#include <linux/acpi.h>
25#include <linux/types.h>
26#include <linux/msi.h>
27
28#if defined(CONFIG_DMAR) || defined(CONFIG_INTR_REMAP)
29struct intel_iommu;
30
31struct dmar_drhd_unit {
32 struct list_head list; /* list of drhd units */
33 struct acpi_dmar_header *hdr; /* ACPI header */
34 u64 reg_base_addr; /* register base address*/
35 struct pci_dev **devices; /* target device array */
36 int devices_cnt; /* target device count */
37 u8 ignored:1; /* ignore drhd */
38 u8 include_all:1;
39 struct intel_iommu *iommu;
40};
41
42extern struct list_head dmar_drhd_units;
43
44#define for_each_drhd_unit(drhd) \
45 list_for_each_entry(drhd, &dmar_drhd_units, list)
46
47extern int dmar_table_init(void);
48extern int dmar_dev_scope_init(void);
49
50/* Intel IOMMU detection */
51extern void detect_intel_iommu(void);
52
53
54extern int parse_ioapics_under_ir(void);
55extern int alloc_iommu(struct dmar_drhd_unit *);
56#else
57static inline void detect_intel_iommu(void)
58{
59 return;
60}
61
62static inline int dmar_table_init(void)
63{
64 return -ENODEV;
65}
66#endif /* !CONFIG_DMAR && !CONFIG_INTR_REMAP */
67
68#ifdef CONFIG_INTR_REMAP
69extern int intr_remapping_enabled;
70extern int enable_intr_remapping(int);
71
72struct irte {
73 union {
74 struct {
75 __u64 present : 1,
76 fpd : 1,
77 dst_mode : 1,
78 redir_hint : 1,
79 trigger_mode : 1,
80 dlvry_mode : 3,
81 avail : 4,
82 __reserved_1 : 4,
83 vector : 8,
84 __reserved_2 : 8,
85 dest_id : 32;
86 };
87 __u64 low;
88 };
89
90 union {
91 struct {
92 __u64 sid : 16,
93 sq : 2,
94 svt : 2,
95 __reserved_3 : 44;
96 };
97 __u64 high;
98 };
99};
100extern int get_irte(int irq, struct irte *entry);
101extern int modify_irte(int irq, struct irte *irte_modified);
102extern int alloc_irte(struct intel_iommu *iommu, int irq, u16 count);
103extern int set_irte_irq(int irq, struct intel_iommu *iommu, u16 index,
104 u16 sub_handle);
105extern int map_irq_to_irte_handle(int irq, u16 *sub_handle);
106extern int clear_irte_irq(int irq, struct intel_iommu *iommu, u16 index);
107extern int flush_irte(int irq);
108extern int free_irte(int irq);
109
110extern int irq_remapped(int irq);
111extern struct intel_iommu *map_dev_to_ir(struct pci_dev *dev);
112extern struct intel_iommu *map_ioapic_to_ir(int apic);
113#else
114#define irq_remapped(irq) (0)
115#define enable_intr_remapping(mode) (-1)
116#define intr_remapping_enabled (0)
117#endif
118
119#ifdef CONFIG_DMAR
120extern const char *dmar_get_fault_reason(u8 fault_reason);
121
122/* Can't use the common MSI interrupt functions
123 * since DMAR is not a pci device
124 */
125extern void dmar_msi_unmask(unsigned int irq);
126extern void dmar_msi_mask(unsigned int irq);
127extern void dmar_msi_read(int irq, struct msi_msg *msg);
128extern void dmar_msi_write(int irq, struct msi_msg *msg);
129extern int dmar_set_interrupt(struct intel_iommu *iommu);
130extern int arch_setup_dmar_msi(unsigned int irq);
131
132extern int iommu_detected, no_iommu;
133extern struct list_head dmar_rmrr_units;
134struct dmar_rmrr_unit {
135 struct list_head list; /* list of rmrr units */
136 struct acpi_dmar_header *hdr; /* ACPI header */
137 u64 base_address; /* reserved base address*/
138 u64 end_address; /* reserved end address */
139 struct pci_dev **devices; /* target devices */
140 int devices_cnt; /* target device count */
141};
142
143#define for_each_rmrr_units(rmrr) \
144 list_for_each_entry(rmrr, &dmar_rmrr_units, list)
145/* Intel DMAR initialization functions */
146extern int intel_iommu_init(void);
147#else
148static inline int intel_iommu_init(void)
149{
150#ifdef CONFIG_INTR_REMAP
151 return dmar_dev_scope_init();
152#else
153 return -ENODEV;
154#endif
155}
156#endif /* !CONFIG_DMAR */
157#endif /* __DMAR_H__ */