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#include <linux/irqreturn.h>
28
29struct intel_iommu;
30#if defined(CONFIG_DMAR) || defined(CONFIG_INTR_REMAP)
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 u16 segment; /* PCI domain */
38 u8 ignored:1; /* ignore drhd */
39 u8 include_all:1;
40 struct intel_iommu *iommu;
41};
42
43extern struct list_head dmar_drhd_units;
44
45#define for_each_drhd_unit(drhd) \
46 list_for_each_entry(drhd, &dmar_drhd_units, list)
47
48#define for_each_active_iommu(i, drhd) \
49 list_for_each_entry(drhd, &dmar_drhd_units, list) \
50 if (i=drhd->iommu, drhd->ignored) {} else
51
52#define for_each_iommu(i, drhd) \
53 list_for_each_entry(drhd, &dmar_drhd_units, list) \
54 if (i=drhd->iommu, 0) {} else
55
56extern int dmar_table_init(void);
57extern int dmar_dev_scope_init(void);
58
59/* Intel IOMMU detection */
60extern int detect_intel_iommu(void);
61extern int enable_drhd_fault_handling(void);
62
63extern int parse_ioapics_under_ir(void);
64extern int alloc_iommu(struct dmar_drhd_unit *);
65#else
66static inline int detect_intel_iommu(void)
67{
68 return -ENODEV;
69}
70
71static inline int dmar_table_init(void)
72{
73 return -ENODEV;
74}
75static inline int enable_drhd_fault_handling(void)
76{
77 return -1;
78}
79#endif /* !CONFIG_DMAR && !CONFIG_INTR_REMAP */
80
81struct irte {
82 union {
83 struct {
84 __u64 present : 1,
85 fpd : 1,
86 dst_mode : 1,
87 redir_hint : 1,
88 trigger_mode : 1,
89 dlvry_mode : 3,
90 avail : 4,
91 __reserved_1 : 4,
92 vector : 8,
93 __reserved_2 : 8,
94 dest_id : 32;
95 };
96 __u64 low;
97 };
98
99 union {
100 struct {
101 __u64 sid : 16,
102 sq : 2,
103 svt : 2,
104 __reserved_3 : 44;
105 };
106 __u64 high;
107 };
108};
109
110#ifdef CONFIG_INTR_REMAP
111extern int intr_remapping_enabled;
112extern int intr_remapping_supported(void);
113extern int enable_intr_remapping(int);
114extern void disable_intr_remapping(void);
115extern int reenable_intr_remapping(int);
116
117extern int get_irte(int irq, struct irte *entry);
118extern int modify_irte(int irq, struct irte *irte_modified);
119extern int alloc_irte(struct intel_iommu *iommu, int irq, u16 count);
120extern int set_irte_irq(int irq, struct intel_iommu *iommu, u16 index,
121 u16 sub_handle);
122extern int map_irq_to_irte_handle(int irq, u16 *sub_handle);
123extern int free_irte(int irq);
124
125extern struct intel_iommu *map_dev_to_ir(struct pci_dev *dev);
126extern struct intel_iommu *map_ioapic_to_ir(int apic);
127extern struct intel_iommu *map_hpet_to_ir(u8 id);
128extern int set_ioapic_sid(struct irte *irte, int apic);
129extern int set_hpet_sid(struct irte *irte, u8 id);
130extern int set_msi_sid(struct irte *irte, struct pci_dev *dev);
131#else
132static inline int alloc_irte(struct intel_iommu *iommu, int irq, u16 count)
133{
134 return -1;
135}
136static inline int modify_irte(int irq, struct irte *irte_modified)
137{
138 return -1;
139}
140static inline int free_irte(int irq)
141{
142 return -1;
143}
144static inline int map_irq_to_irte_handle(int irq, u16 *sub_handle)
145{
146 return -1;
147}
148static inline int set_irte_irq(int irq, struct intel_iommu *iommu, u16 index,
149 u16 sub_handle)
150{
151 return -1;
152}
153static inline struct intel_iommu *map_dev_to_ir(struct pci_dev *dev)
154{
155 return NULL;
156}
157static inline struct intel_iommu *map_ioapic_to_ir(int apic)
158{
159 return NULL;
160}
161static inline struct intel_iommu *map_hpet_to_ir(unsigned int hpet_id)
162{
163 return NULL;
164}
165static inline int set_ioapic_sid(struct irte *irte, int apic)
166{
167 return 0;
168}
169static inline int set_hpet_sid(struct irte *irte, u8 id)
170{
171 return -1;
172}
173static inline int set_msi_sid(struct irte *irte, struct pci_dev *dev)
174{
175 return 0;
176}
177
178#define intr_remapping_enabled (0)
179
180static inline int enable_intr_remapping(int eim)
181{
182 return -1;
183}
184
185static inline void disable_intr_remapping(void)
186{
187}
188
189static inline int reenable_intr_remapping(int eim)
190{
191 return 0;
192}
193#endif
194
195/* Can't use the common MSI interrupt functions
196 * since DMAR is not a pci device
197 */
198struct irq_data;
199extern void dmar_msi_unmask(struct irq_data *data);
200extern void dmar_msi_mask(struct irq_data *data);
201extern void dmar_msi_read(int irq, struct msi_msg *msg);
202extern void dmar_msi_write(int irq, struct msi_msg *msg);
203extern int dmar_set_interrupt(struct intel_iommu *iommu);
204extern irqreturn_t dmar_fault(int irq, void *dev_id);
205extern int arch_setup_dmar_msi(unsigned int irq);
206
207#ifdef CONFIG_DMAR
208extern int iommu_detected, no_iommu;
209extern struct list_head dmar_rmrr_units;
210struct dmar_rmrr_unit {
211 struct list_head list; /* list of rmrr units */
212 struct acpi_dmar_header *hdr; /* ACPI header */
213 u64 base_address; /* reserved base address*/
214 u64 end_address; /* reserved end address */
215 struct pci_dev **devices; /* target devices */
216 int devices_cnt; /* target device count */
217};
218
219#define for_each_rmrr_units(rmrr) \
220 list_for_each_entry(rmrr, &dmar_rmrr_units, list)
221
222struct dmar_atsr_unit {
223 struct list_head list; /* list of ATSR units */
224 struct acpi_dmar_header *hdr; /* ACPI header */
225 struct pci_dev **devices; /* target devices */
226 int devices_cnt; /* target device count */
227 u8 include_all:1; /* include all ports */
228};
229
230extern int intel_iommu_init(void);
231#else /* !CONFIG_DMAR: */
232static inline int intel_iommu_init(void) { return -ENODEV; }
233#endif /* CONFIG_DMAR */
234
235#endif /* __DMAR_H__ */