1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (c) 2006, Intel Corporation. 4 * 5 * Copyright (C) Ashok Raj <ashok.raj@intel.com> 6 * Copyright (C) Shaohua Li <shaohua.li@intel.com> 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 19 struct acpi_dmar_header; 20 21 #define DMAR_UNITS_SUPPORTED 1024 22 23 /* DMAR Flags */ 24 #define DMAR_INTR_REMAP 0x1 25 #define DMAR_X2APIC_OPT_OUT 0x2 26 #define DMAR_PLATFORM_OPT_IN 0x4 27 28 struct intel_iommu; 29 30 struct dmar_dev_scope { 31 struct device __rcu *dev; 32 u8 bus; 33 u8 devfn; 34 }; 35 36 #ifdef CONFIG_DMAR_TABLE 37 extern struct acpi_table_header *dmar_tbl; 38 struct dmar_drhd_unit { 39 struct list_head list; /* list of drhd units */ 40 struct acpi_dmar_header *hdr; /* ACPI header */ 41 u64 reg_base_addr; /* register base address*/ 42 unsigned long reg_size; /* size of register set */ 43 struct dmar_dev_scope *devices;/* target device array */ 44 int devices_cnt; /* target device count */ 45 u16 segment; /* PCI domain */ 46 u8 ignored:1; /* ignore drhd */ 47 u8 include_all:1; 48 u8 gfx_dedicated:1; /* graphic dedicated */ 49 struct intel_iommu *iommu; 50 }; 51 52 struct dmar_pci_path { 53 u8 bus; 54 u8 device; 55 u8 function; 56 }; 57 58 struct dmar_pci_notify_info { 59 struct pci_dev *dev; 60 unsigned long event; 61 int bus; 62 u16 seg; 63 u16 level; 64 struct dmar_pci_path path[]; 65 } __attribute__((packed)); 66 67 extern struct rw_semaphore dmar_global_lock; 68 extern struct list_head dmar_drhd_units; 69 70 #define for_each_drhd_unit(drhd) \ 71 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list, \ 72 dmar_rcu_check()) 73 74 #define for_each_active_drhd_unit(drhd) \ 75 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list, \ 76 dmar_rcu_check()) \ 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 dmar_rcu_check()) \ 82 if (i=drhd->iommu, drhd->ignored) {} else 83 84 #define for_each_iommu(i, drhd) \ 85 list_for_each_entry_rcu(drhd, &dmar_drhd_units, list, \ 86 dmar_rcu_check()) \ 87 if (i=drhd->iommu, 0) {} else 88 89 static inline bool dmar_rcu_check(void) 90 { 91 return rwsem_is_locked(&dmar_global_lock) || 92 system_state == SYSTEM_BOOTING; 93 } 94 95 #define dmar_rcu_dereference(p) rcu_dereference_check((p), dmar_rcu_check()) 96 97 #define for_each_dev_scope(devs, cnt, i, tmp) \ 98 for ((i) = 0; ((tmp) = (i) < (cnt) ? \ 99 dmar_rcu_dereference((devs)[(i)].dev) : NULL, (i) < (cnt)); \ 100 (i)++) 101 102 #define for_each_active_dev_scope(devs, cnt, i, tmp) \ 103 for_each_dev_scope((devs), (cnt), (i), (tmp)) \ 104 if (!(tmp)) { continue; } else 105 106 extern int dmar_table_init(void); 107 extern int dmar_dev_scope_init(void); 108 extern void dmar_register_bus_notifier(void); 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, 114 int devices_cnt); 115 extern int dmar_remove_dev_scope(struct dmar_pci_notify_info *info, 116 u16 segment, struct dmar_dev_scope *devices, 117 int count); 118 /* Intel IOMMU detection */ 119 void 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); 123 124 static inline int dmar_res_noop(struct acpi_dmar_header *hdr, void *arg) 125 { 126 return 0; 127 } 128 129 #ifdef CONFIG_DMAR_DEBUG 130 void dmar_fault_dump_ptes(struct intel_iommu *iommu, u16 source_id, 131 unsigned long long addr, u32 pasid); 132 #else 133 static inline void dmar_fault_dump_ptes(struct intel_iommu *iommu, u16 source_id, 134 unsigned long long addr, u32 pasid) {} 135 #endif 136 137 #ifdef CONFIG_INTEL_IOMMU 138 extern int iommu_detected, no_iommu; 139 extern int intel_iommu_init(void); 140 extern void intel_iommu_shutdown(void); 141 extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg); 142 extern int dmar_parse_one_atsr(struct acpi_dmar_header *header, void *arg); 143 extern int dmar_check_one_atsr(struct acpi_dmar_header *hdr, void *arg); 144 extern int dmar_parse_one_satc(struct acpi_dmar_header *hdr, void *arg); 145 extern int dmar_release_one_atsr(struct acpi_dmar_header *hdr, void *arg); 146 extern int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert); 147 extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info); 148 #else /* !CONFIG_INTEL_IOMMU: */ 149 static inline int intel_iommu_init(void) { return -ENODEV; } 150 static inline void intel_iommu_shutdown(void) { } 151 152 #define dmar_parse_one_rmrr dmar_res_noop 153 #define dmar_parse_one_atsr dmar_res_noop 154 #define dmar_check_one_atsr dmar_res_noop 155 #define dmar_release_one_atsr dmar_res_noop 156 #define dmar_parse_one_satc dmar_res_noop 157 158 static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info) 159 { 160 return 0; 161 } 162 163 static inline int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert) 164 { 165 return 0; 166 } 167 #endif /* CONFIG_INTEL_IOMMU */ 168 169 #ifdef CONFIG_IRQ_REMAP 170 extern int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert); 171 #else /* CONFIG_IRQ_REMAP */ 172 static inline int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert) 173 { return 0; } 174 #endif /* CONFIG_IRQ_REMAP */ 175 176 extern bool dmar_platform_optin(void); 177 178 #else /* CONFIG_DMAR_TABLE */ 179 180 static inline int dmar_device_add(void *handle) 181 { 182 return 0; 183 } 184 185 static inline int dmar_device_remove(void *handle) 186 { 187 return 0; 188 } 189 190 static inline bool dmar_platform_optin(void) 191 { 192 return false; 193 } 194 195 static inline void detect_intel_iommu(void) 196 { 197 } 198 199 #endif /* CONFIG_DMAR_TABLE */ 200 201 struct irte { 202 union { 203 struct { 204 union { 205 /* Shared between remapped and posted mode*/ 206 struct { 207 __u64 present : 1, /* 0 */ 208 fpd : 1, /* 1 */ 209 __res0 : 6, /* 2 - 6 */ 210 avail : 4, /* 8 - 11 */ 211 __res1 : 3, /* 12 - 14 */ 212 pst : 1, /* 15 */ 213 vector : 8, /* 16 - 23 */ 214 __res2 : 40; /* 24 - 63 */ 215 }; 216 217 /* Remapped mode */ 218 struct { 219 __u64 r_present : 1, /* 0 */ 220 r_fpd : 1, /* 1 */ 221 dst_mode : 1, /* 2 */ 222 redir_hint : 1, /* 3 */ 223 trigger_mode : 1, /* 4 */ 224 dlvry_mode : 3, /* 5 - 7 */ 225 r_avail : 4, /* 8 - 11 */ 226 r_res0 : 4, /* 12 - 15 */ 227 r_vector : 8, /* 16 - 23 */ 228 r_res1 : 8, /* 24 - 31 */ 229 dest_id : 32; /* 32 - 63 */ 230 }; 231 232 /* Posted mode */ 233 struct { 234 __u64 p_present : 1, /* 0 */ 235 p_fpd : 1, /* 1 */ 236 p_res0 : 6, /* 2 - 7 */ 237 p_avail : 4, /* 8 - 11 */ 238 p_res1 : 2, /* 12 - 13 */ 239 p_urgent : 1, /* 14 */ 240 p_pst : 1, /* 15 */ 241 p_vector : 8, /* 16 - 23 */ 242 p_res2 : 14, /* 24 - 37 */ 243 pda_l : 26; /* 38 - 63 */ 244 }; 245 __u64 low; 246 }; 247 248 union { 249 /* Shared between remapped and posted mode*/ 250 struct { 251 __u64 sid : 16, /* 64 - 79 */ 252 sq : 2, /* 80 - 81 */ 253 svt : 2, /* 82 - 83 */ 254 __res3 : 44; /* 84 - 127 */ 255 }; 256 257 /* Posted mode*/ 258 struct { 259 __u64 p_sid : 16, /* 64 - 79 */ 260 p_sq : 2, /* 80 - 81 */ 261 p_svt : 2, /* 82 - 83 */ 262 p_res3 : 12, /* 84 - 95 */ 263 pda_h : 32; /* 96 - 127 */ 264 }; 265 __u64 high; 266 }; 267 }; 268 #ifdef CONFIG_IRQ_REMAP 269 __u128 irte; 270 #endif 271 }; 272 }; 273 274 static inline void dmar_copy_shared_irte(struct irte *dst, struct irte *src) 275 { 276 dst->present = src->present; 277 dst->fpd = src->fpd; 278 dst->avail = src->avail; 279 dst->pst = src->pst; 280 dst->vector = src->vector; 281 dst->sid = src->sid; 282 dst->sq = src->sq; 283 dst->svt = src->svt; 284 } 285 286 #define PDA_LOW_BIT 26 287 #define PDA_HIGH_BIT 32 288 289 /* Can't use the common MSI interrupt functions 290 * since DMAR is not a pci device 291 */ 292 struct irq_data; 293 extern void dmar_msi_unmask(struct irq_data *data); 294 extern void dmar_msi_mask(struct irq_data *data); 295 extern void dmar_msi_read(int irq, struct msi_msg *msg); 296 extern void dmar_msi_write(int irq, struct msi_msg *msg); 297 extern int dmar_set_interrupt(struct intel_iommu *iommu); 298 extern irqreturn_t dmar_fault(int irq, void *dev_id); 299 extern int dmar_alloc_hwirq(int id, int node, void *arg); 300 extern void dmar_free_hwirq(int irq); 301 302 #endif /* __DMAR_H__ */ 303