1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (c) 2006, Intel Corporation.
5 * Copyright (C) Ashok Raj <ashok.raj@intel.com>
6 * Copyright (C) Shaohua Li <shaohua.li@intel.com>
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>
19 struct acpi_dmar_header;
22 # define DMAR_UNITS_SUPPORTED MAX_IO_APICS
24 # define DMAR_UNITS_SUPPORTED 64
28 #define DMAR_INTR_REMAP 0x1
29 #define DMAR_X2APIC_OPT_OUT 0x2
30 #define DMAR_PLATFORM_OPT_IN 0x4
34 struct dmar_dev_scope {
35 struct device __rcu *dev;
40 #ifdef CONFIG_DMAR_TABLE
41 extern struct acpi_table_header *dmar_tbl;
42 struct dmar_drhd_unit {
43 struct list_head list; /* list of drhd units */
44 struct acpi_dmar_header *hdr; /* ACPI header */
45 u64 reg_base_addr; /* register base address*/
46 struct dmar_dev_scope *devices;/* target device array */
47 int devices_cnt; /* target device count */
48 u16 segment; /* PCI domain */
49 u8 ignored:1; /* ignore drhd */
51 struct intel_iommu *iommu;
54 struct dmar_pci_path {
60 struct dmar_pci_notify_info {
66 struct dmar_pci_path path[];
67 } __attribute__((packed));
69 extern struct rw_semaphore dmar_global_lock;
70 extern struct list_head dmar_drhd_units;
72 #define for_each_drhd_unit(drhd) \
73 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list)
75 #define for_each_active_drhd_unit(drhd) \
76 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
77 if (drhd->ignored) {} else
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
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
87 static inline bool dmar_rcu_check(void)
89 return rwsem_is_locked(&dmar_global_lock) ||
90 system_state == SYSTEM_BOOTING;
93 #define dmar_rcu_dereference(p) rcu_dereference_check((p), dmar_rcu_check())
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)); \
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
104 extern int dmar_table_init(void);
105 extern int dmar_dev_scope_init(void);
106 extern void dmar_register_bus_notifier(void);
107 extern int dmar_parse_dev_scope(void *start, void *end, int *cnt,
108 struct dmar_dev_scope **devices, u16 segment);
109 extern void *dmar_alloc_dev_scope(void *start, void *end, int *cnt);
110 extern void dmar_free_dev_scope(struct dmar_dev_scope **devices, int *cnt);
111 extern int dmar_insert_dev_scope(struct dmar_pci_notify_info *info,
112 void *start, void*end, u16 segment,
113 struct dmar_dev_scope *devices,
115 extern int dmar_remove_dev_scope(struct dmar_pci_notify_info *info,
116 u16 segment, struct dmar_dev_scope *devices,
118 /* Intel IOMMU detection */
119 extern int detect_intel_iommu(void);
120 extern int enable_drhd_fault_handling(void);
121 extern int dmar_device_add(acpi_handle handle);
122 extern int dmar_device_remove(acpi_handle handle);
124 static inline int dmar_res_noop(struct acpi_dmar_header *hdr, void *arg)
129 #ifdef CONFIG_INTEL_IOMMU
130 extern int iommu_detected, no_iommu;
131 extern int intel_iommu_init(void);
132 extern void intel_iommu_shutdown(void);
133 extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg);
134 extern int dmar_parse_one_atsr(struct acpi_dmar_header *header, void *arg);
135 extern int dmar_check_one_atsr(struct acpi_dmar_header *hdr, void *arg);
136 extern int dmar_release_one_atsr(struct acpi_dmar_header *hdr, void *arg);
137 extern int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert);
138 extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info);
139 #else /* !CONFIG_INTEL_IOMMU: */
140 static inline int intel_iommu_init(void) { return -ENODEV; }
141 static inline void intel_iommu_shutdown(void) { }
143 #define dmar_parse_one_rmrr dmar_res_noop
144 #define dmar_parse_one_atsr dmar_res_noop
145 #define dmar_check_one_atsr dmar_res_noop
146 #define dmar_release_one_atsr dmar_res_noop
148 static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)
153 static inline int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert)
157 #endif /* CONFIG_INTEL_IOMMU */
159 #ifdef CONFIG_IRQ_REMAP
160 extern int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert);
161 #else /* CONFIG_IRQ_REMAP */
162 static inline int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert)
164 #endif /* CONFIG_IRQ_REMAP */
166 extern bool dmar_platform_optin(void);
168 #else /* CONFIG_DMAR_TABLE */
170 static inline int dmar_device_add(void *handle)
175 static inline int dmar_device_remove(void *handle)
180 static inline bool dmar_platform_optin(void)
185 #endif /* CONFIG_DMAR_TABLE */
189 /* Shared between remapped and posted mode*/
191 __u64 present : 1, /* 0 */
193 __res0 : 6, /* 2 - 6 */
194 avail : 4, /* 8 - 11 */
195 __res1 : 3, /* 12 - 14 */
197 vector : 8, /* 16 - 23 */
198 __res2 : 40; /* 24 - 63 */
203 __u64 r_present : 1, /* 0 */
205 dst_mode : 1, /* 2 */
206 redir_hint : 1, /* 3 */
207 trigger_mode : 1, /* 4 */
208 dlvry_mode : 3, /* 5 - 7 */
209 r_avail : 4, /* 8 - 11 */
210 r_res0 : 4, /* 12 - 15 */
211 r_vector : 8, /* 16 - 23 */
212 r_res1 : 8, /* 24 - 31 */
213 dest_id : 32; /* 32 - 63 */
218 __u64 p_present : 1, /* 0 */
220 p_res0 : 6, /* 2 - 7 */
221 p_avail : 4, /* 8 - 11 */
222 p_res1 : 2, /* 12 - 13 */
223 p_urgent : 1, /* 14 */
225 p_vector : 8, /* 16 - 23 */
226 p_res2 : 14, /* 24 - 37 */
227 pda_l : 26; /* 38 - 63 */
233 /* Shared between remapped and posted mode*/
235 __u64 sid : 16, /* 64 - 79 */
236 sq : 2, /* 80 - 81 */
237 svt : 2, /* 82 - 83 */
238 __res3 : 44; /* 84 - 127 */
243 __u64 p_sid : 16, /* 64 - 79 */
244 p_sq : 2, /* 80 - 81 */
245 p_svt : 2, /* 82 - 83 */
246 p_res3 : 12, /* 84 - 95 */
247 pda_h : 32; /* 96 - 127 */
253 static inline void dmar_copy_shared_irte(struct irte *dst, struct irte *src)
255 dst->present = src->present;
257 dst->avail = src->avail;
259 dst->vector = src->vector;
265 #define PDA_LOW_BIT 26
266 #define PDA_HIGH_BIT 32
268 /* Can't use the common MSI interrupt functions
269 * since DMAR is not a pci device
272 extern void dmar_msi_unmask(struct irq_data *data);
273 extern void dmar_msi_mask(struct irq_data *data);
274 extern void dmar_msi_read(int irq, struct msi_msg *msg);
275 extern void dmar_msi_write(int irq, struct msi_msg *msg);
276 extern int dmar_set_interrupt(struct intel_iommu *iommu);
277 extern irqreturn_t dmar_fault(int irq, void *dev_id);
278 extern int dmar_alloc_hwirq(int id, int node, void *arg);
279 extern void dmar_free_hwirq(int irq);
281 #endif /* __DMAR_H__ */