1
2
3
4
5
6
7
8
9#ifndef __DMAR_H__
10#define __DMAR_H__
11
12#include <linux/acpi.h>
13#include <linux/types.h>
14#include <linux/msi.h>
15#include <linux/irqreturn.h>
16#include <linux/rwsem.h>
17#include <linux/rculist.h>
18
19struct acpi_dmar_header;
20
21#ifdef CONFIG_X86
22# define DMAR_UNITS_SUPPORTED MAX_IO_APICS
23#else
24# define DMAR_UNITS_SUPPORTED 64
25#endif
26
27
28#define DMAR_INTR_REMAP 0x1
29#define DMAR_X2APIC_OPT_OUT 0x2
30#define DMAR_PLATFORM_OPT_IN 0x4
31
32struct intel_iommu;
33
34struct dmar_dev_scope {
35 struct device __rcu *dev;
36 u8 bus;
37 u8 devfn;
38};
39
40#ifdef CONFIG_DMAR_TABLE
41extern struct acpi_table_header *dmar_tbl;
42struct dmar_drhd_unit {
43 struct list_head list;
44 struct acpi_dmar_header *hdr;
45 u64 reg_base_addr;
46 struct dmar_dev_scope *devices;
47 int devices_cnt;
48 u16 segment;
49 u8 ignored:1;
50 u8 include_all:1;
51 struct intel_iommu *iommu;
52};
53
54struct dmar_pci_path {
55 u8 bus;
56 u8 device;
57 u8 function;
58};
59
60struct dmar_pci_notify_info {
61 struct pci_dev *dev;
62 unsigned long event;
63 int bus;
64 u16 seg;
65 u16 level;
66 struct dmar_pci_path path[];
67} __attribute__((packed));
68
69extern struct rw_semaphore dmar_global_lock;
70extern struct list_head dmar_drhd_units;
71
72#define for_each_drhd_unit(drhd) \
73 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list)
74
75#define for_each_active_drhd_unit(drhd) \
76 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
77 if (drhd->ignored) {} else
78
79#define for_each_active_iommu(i, drhd) \
80 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
81 if (i=drhd->iommu, drhd->ignored) {} else
82
83#define for_each_iommu(i, drhd) \
84 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
85 if (i=drhd->iommu, 0) {} else
86
87static inline bool dmar_rcu_check(void)
88{
89 return rwsem_is_locked(&dmar_global_lock) ||
90 system_state == SYSTEM_BOOTING;
91}
92
93#define dmar_rcu_dereference(p) rcu_dereference_check((p), dmar_rcu_check())
94
95#define for_each_dev_scope(devs, cnt, i, tmp) \
96 for ((i) = 0; ((tmp) = (i) < (cnt) ? \
97 dmar_rcu_dereference((devs)[(i)].dev) : NULL, (i) < (cnt)); \
98 (i)++)
99
100#define for_each_active_dev_scope(devs, cnt, i, tmp) \
101 for_each_dev_scope((devs), (cnt), (i), (tmp)) \
102 if (!(tmp)) { continue; } else
103
104extern int dmar_table_init(void);
105extern int dmar_dev_scope_init(void);
106extern void dmar_register_bus_notifier(void);
107extern int dmar_parse_dev_scope(void *start, void *end, int *cnt,
108 struct dmar_dev_scope **devices, u16 segment);
109extern void *dmar_alloc_dev_scope(void *start, void *end, int *cnt);
110extern void dmar_free_dev_scope(struct dmar_dev_scope **devices, int *cnt);
111extern int dmar_insert_dev_scope(struct dmar_pci_notify_info *info,
112 void *start, void*end, u16 segment,
113 struct dmar_dev_scope *devices,
114 int devices_cnt);
115extern int dmar_remove_dev_scope(struct dmar_pci_notify_info *info,
116 u16 segment, struct dmar_dev_scope *devices,
117 int count);
118
119extern int detect_intel_iommu(void);
120extern int enable_drhd_fault_handling(void);
121extern int dmar_device_add(acpi_handle handle);
122extern int dmar_device_remove(acpi_handle handle);
123
124static inline int dmar_res_noop(struct acpi_dmar_header *hdr, void *arg)
125{
126 return 0;
127}
128
129#ifdef CONFIG_INTEL_IOMMU
130extern int iommu_detected, no_iommu;
131extern int intel_iommu_init(void);
132extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg);
133extern int dmar_parse_one_atsr(struct acpi_dmar_header *header, void *arg);
134extern int dmar_check_one_atsr(struct acpi_dmar_header *hdr, void *arg);
135extern int dmar_release_one_atsr(struct acpi_dmar_header *hdr, void *arg);
136extern int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert);
137extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info);
138#else
139static inline int intel_iommu_init(void) { return -ENODEV; }
140
141#define dmar_parse_one_rmrr dmar_res_noop
142#define dmar_parse_one_atsr dmar_res_noop
143#define dmar_check_one_atsr dmar_res_noop
144#define dmar_release_one_atsr dmar_res_noop
145
146static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)
147{
148 return 0;
149}
150
151static inline int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert)
152{
153 return 0;
154}
155#endif
156
157#ifdef CONFIG_IRQ_REMAP
158extern int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert);
159#else
160static inline int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert)
161{ return 0; }
162#endif
163
164extern bool dmar_platform_optin(void);
165
166#else
167
168static inline int dmar_device_add(void *handle)
169{
170 return 0;
171}
172
173static inline int dmar_device_remove(void *handle)
174{
175 return 0;
176}
177
178static inline bool dmar_platform_optin(void)
179{
180 return false;
181}
182
183#endif
184
185struct irte {
186 union {
187
188 struct {
189 __u64 present : 1,
190 fpd : 1,
191 __res0 : 6,
192 avail : 4,
193 __res1 : 3,
194 pst : 1,
195 vector : 8,
196 __res2 : 40;
197 };
198
199
200 struct {
201 __u64 r_present : 1,
202 r_fpd : 1,
203 dst_mode : 1,
204 redir_hint : 1,
205 trigger_mode : 1,
206 dlvry_mode : 3,
207 r_avail : 4,
208 r_res0 : 4,
209 r_vector : 8,
210 r_res1 : 8,
211 dest_id : 32;
212 };
213
214
215 struct {
216 __u64 p_present : 1,
217 p_fpd : 1,
218 p_res0 : 6,
219 p_avail : 4,
220 p_res1 : 2,
221 p_urgent : 1,
222 p_pst : 1,
223 p_vector : 8,
224 p_res2 : 14,
225 pda_l : 26;
226 };
227 __u64 low;
228 };
229
230 union {
231
232 struct {
233 __u64 sid : 16,
234 sq : 2,
235 svt : 2,
236 __res3 : 44;
237 };
238
239
240 struct {
241 __u64 p_sid : 16,
242 p_sq : 2,
243 p_svt : 2,
244 p_res3 : 12,
245 pda_h : 32;
246 };
247 __u64 high;
248 };
249};
250
251static inline void dmar_copy_shared_irte(struct irte *dst, struct irte *src)
252{
253 dst->present = src->present;
254 dst->fpd = src->fpd;
255 dst->avail = src->avail;
256 dst->pst = src->pst;
257 dst->vector = src->vector;
258 dst->sid = src->sid;
259 dst->sq = src->sq;
260 dst->svt = src->svt;
261}
262
263#define PDA_LOW_BIT 26
264#define PDA_HIGH_BIT 32
265
266
267
268
269struct irq_data;
270extern void dmar_msi_unmask(struct irq_data *data);
271extern void dmar_msi_mask(struct irq_data *data);
272extern void dmar_msi_read(int irq, struct msi_msg *msg);
273extern void dmar_msi_write(int irq, struct msi_msg *msg);
274extern int dmar_set_interrupt(struct intel_iommu *iommu);
275extern irqreturn_t dmar_fault(int irq, void *dev_id);
276extern int dmar_alloc_hwirq(int id, int node, void *arg);
277extern void dmar_free_hwirq(int irq);
278
279#endif
280
