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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 u8 gfx_dedicated:1;
52 struct intel_iommu *iommu;
53};
54
55struct dmar_pci_path {
56 u8 bus;
57 u8 device;
58 u8 function;
59};
60
61struct dmar_pci_notify_info {
62 struct pci_dev *dev;
63 unsigned long event;
64 int bus;
65 u16 seg;
66 u16 level;
67 struct dmar_pci_path path[];
68} __attribute__((packed));
69
70extern struct rw_semaphore dmar_global_lock;
71extern struct list_head dmar_drhd_units;
72
73#define for_each_drhd_unit(drhd) \
74 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list, \
75 dmar_rcu_check())
76
77#define for_each_active_drhd_unit(drhd) \
78 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list, \
79 dmar_rcu_check()) \
80 if (drhd->ignored) {} else
81
82#define for_each_active_iommu(i, drhd) \
83 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list, \
84 dmar_rcu_check()) \
85 if (i=drhd->iommu, drhd->ignored) {} else
86
87#define for_each_iommu(i, drhd) \
88 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list, \
89 dmar_rcu_check()) \
90 if (i=drhd->iommu, 0) {} else
91
92static inline bool dmar_rcu_check(void)
93{
94 return rwsem_is_locked(&dmar_global_lock) ||
95 system_state == SYSTEM_BOOTING;
96}
97
98#define dmar_rcu_dereference(p) rcu_dereference_check((p), dmar_rcu_check())
99
100#define for_each_dev_scope(devs, cnt, i, tmp) \
101 for ((i) = 0; ((tmp) = (i) < (cnt) ? \
102 dmar_rcu_dereference((devs)[(i)].dev) : NULL, (i) < (cnt)); \
103 (i)++)
104
105#define for_each_active_dev_scope(devs, cnt, i, tmp) \
106 for_each_dev_scope((devs), (cnt), (i), (tmp)) \
107 if (!(tmp)) { continue; } else
108
109extern int dmar_table_init(void);
110extern int dmar_dev_scope_init(void);
111extern void dmar_register_bus_notifier(void);
112extern int dmar_parse_dev_scope(void *start, void *end, int *cnt,
113 struct dmar_dev_scope **devices, u16 segment);
114extern void *dmar_alloc_dev_scope(void *start, void *end, int *cnt);
115extern void dmar_free_dev_scope(struct dmar_dev_scope **devices, int *cnt);
116extern int dmar_insert_dev_scope(struct dmar_pci_notify_info *info,
117 void *start, void*end, u16 segment,
118 struct dmar_dev_scope *devices,
119 int devices_cnt);
120extern int dmar_remove_dev_scope(struct dmar_pci_notify_info *info,
121 u16 segment, struct dmar_dev_scope *devices,
122 int count);
123
124extern int detect_intel_iommu(void);
125extern int enable_drhd_fault_handling(void);
126extern int dmar_device_add(acpi_handle handle);
127extern int dmar_device_remove(acpi_handle handle);
128
129static inline int dmar_res_noop(struct acpi_dmar_header *hdr, void *arg)
130{
131 return 0;
132}
133
134#ifdef CONFIG_INTEL_IOMMU
135extern int iommu_detected, no_iommu;
136extern int intel_iommu_init(void);
137extern void intel_iommu_shutdown(void);
138extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg);
139extern int dmar_parse_one_atsr(struct acpi_dmar_header *header, void *arg);
140extern int dmar_check_one_atsr(struct acpi_dmar_header *hdr, void *arg);
141extern int dmar_parse_one_satc(struct acpi_dmar_header *hdr, void *arg);
142extern int dmar_release_one_atsr(struct acpi_dmar_header *hdr, void *arg);
143extern int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert);
144extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info);
145#else
146static inline int intel_iommu_init(void) { return -ENODEV; }
147static inline void intel_iommu_shutdown(void) { }
148
149#define dmar_parse_one_rmrr dmar_res_noop
150#define dmar_parse_one_atsr dmar_res_noop
151#define dmar_check_one_atsr dmar_res_noop
152#define dmar_release_one_atsr dmar_res_noop
153#define dmar_parse_one_satc dmar_res_noop
154
155static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)
156{
157 return 0;
158}
159
160static inline int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert)
161{
162 return 0;
163}
164#endif
165
166#ifdef CONFIG_IRQ_REMAP
167extern int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert);
168#else
169static inline int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert)
170{ return 0; }
171#endif
172
173extern bool dmar_platform_optin(void);
174
175#else
176
177static inline int dmar_device_add(void *handle)
178{
179 return 0;
180}
181
182static inline int dmar_device_remove(void *handle)
183{
184 return 0;
185}
186
187static inline bool dmar_platform_optin(void)
188{
189 return false;
190}
191
192#endif
193
194struct irte {
195 union {
196
197 struct {
198 __u64 present : 1,
199 fpd : 1,
200 __res0 : 6,
201 avail : 4,
202 __res1 : 3,
203 pst : 1,
204 vector : 8,
205 __res2 : 40;
206 };
207
208
209 struct {
210 __u64 r_present : 1,
211 r_fpd : 1,
212 dst_mode : 1,
213 redir_hint : 1,
214 trigger_mode : 1,
215 dlvry_mode : 3,
216 r_avail : 4,
217 r_res0 : 4,
218 r_vector : 8,
219 r_res1 : 8,
220 dest_id : 32;
221 };
222
223
224 struct {
225 __u64 p_present : 1,
226 p_fpd : 1,
227 p_res0 : 6,
228 p_avail : 4,
229 p_res1 : 2,
230 p_urgent : 1,
231 p_pst : 1,
232 p_vector : 8,
233 p_res2 : 14,
234 pda_l : 26;
235 };
236 __u64 low;
237 };
238
239 union {
240
241 struct {
242 __u64 sid : 16,
243 sq : 2,
244 svt : 2,
245 __res3 : 44;
246 };
247
248
249 struct {
250 __u64 p_sid : 16,
251 p_sq : 2,
252 p_svt : 2,
253 p_res3 : 12,
254 pda_h : 32;
255 };
256 __u64 high;
257 };
258};
259
260static inline void dmar_copy_shared_irte(struct irte *dst, struct irte *src)
261{
262 dst->present = src->present;
263 dst->fpd = src->fpd;
264 dst->avail = src->avail;
265 dst->pst = src->pst;
266 dst->vector = src->vector;
267 dst->sid = src->sid;
268 dst->sq = src->sq;
269 dst->svt = src->svt;
270}
271
272#define PDA_LOW_BIT 26
273#define PDA_HIGH_BIT 32
274
275
276
277
278struct irq_data;
279extern void dmar_msi_unmask(struct irq_data *data);
280extern void dmar_msi_mask(struct irq_data *data);
281extern void dmar_msi_read(int irq, struct msi_msg *msg);
282extern void dmar_msi_write(int irq, struct msi_msg *msg);
283extern int dmar_set_interrupt(struct intel_iommu *iommu);
284extern irqreturn_t dmar_fault(int irq, void *dev_id);
285extern int dmar_alloc_hwirq(int id, int node, void *arg);
286extern void dmar_free_hwirq(int irq);
287
288#endif
289
