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 #ifdef CONFIG_X86 22 # define DMAR_UNITS_SUPPORTED MAX_IO_APICS 23 #else 24 # define DMAR_UNITS_SUPPORTED 64 25 #endif 26 27 /* DMAR Flags */ 28 #define DMAR_INTR_REMAP 0x1 29 #define DMAR_X2APIC_OPT_OUT 0x2 30 #define DMAR_PLATFORM_OPT_IN 0x4 31 32 struct intel_iommu; 33 34 struct dmar_dev_scope { 35 struct device __rcu *dev; 36 u8 bus; 37 u8 devfn; 38 }; 39 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 */ 50 u8 include_all:1; 51 u8 gfx_dedicated:1; /* graphic dedicated */ 52 struct intel_iommu *iommu; 53 }; 54 55 struct dmar_pci_path { 56 u8 bus; 57 u8 device; 58 u8 function; 59 }; 60 61 struct 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 70 extern struct rw_semaphore dmar_global_lock; 71 extern 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 92 static 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 108 109 extern int dmar_table_init(void); 110 extern int dmar_dev_scope_init(void); 111 extern void dmar_register_bus_notifier(void); 112 extern int dmar_parse_dev_scope(void *start, void *end, int *cnt, 113 struct dmar_dev_scope **devices, u16 segment); 114 extern void *dmar_alloc_dev_scope(void *start, void *end, int *cnt); 115 extern void dmar_free_dev_scope(struct dmar_dev_scope **devices, int *cnt); 116 extern 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); 120 extern int dmar_remove_dev_scope(struct dmar_pci_notify_info *info, 121 u16 segment, struct dmar_dev_scope *devices, 122 int count); 123 /* Intel IOMMU detection */ 124 extern int detect_intel_iommu(void); 125 extern int enable_drhd_fault_handling(void); 126 extern int dmar_device_add(acpi_handle handle); 127 extern int dmar_device_remove(acpi_handle handle); 128 129 static inline int dmar_res_noop(struct acpi_dmar_header *hdr, void *arg) 130 { 131 return 0; 132 } 133 134 #ifdef CONFIG_INTEL_IOMMU 135 extern int iommu_detected, no_iommu; 136 extern int intel_iommu_init(void); 137 extern void intel_iommu_shutdown(void); 138 extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg); 139 extern int dmar_parse_one_atsr(struct acpi_dmar_header *header, void *arg); 140 extern int dmar_check_one_atsr(struct acpi_dmar_header *hdr, void *arg); 141 extern int dmar_release_one_atsr(struct acpi_dmar_header *hdr, void *arg); 142 extern int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert); 143 extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info); 144 #else /* !CONFIG_INTEL_IOMMU: */ 145 static inline int intel_iommu_init(void) { return -ENODEV; } 146 static inline void intel_iommu_shutdown(void) { } 147 148 #define dmar_parse_one_rmrr dmar_res_noop 149 #define dmar_parse_one_atsr dmar_res_noop 150 #define dmar_check_one_atsr dmar_res_noop 151 #define dmar_release_one_atsr dmar_res_noop 152 153 static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info) 154 { 155 return 0; 156 } 157 158 static inline int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert) 159 { 160 return 0; 161 } 162 #endif /* CONFIG_INTEL_IOMMU */ 163 164 #ifdef CONFIG_IRQ_REMAP 165 extern int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert); 166 #else /* CONFIG_IRQ_REMAP */ 167 static inline int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert) 168 { return 0; } 169 #endif /* CONFIG_IRQ_REMAP */ 170 171 extern bool dmar_platform_optin(void); 172 173 #else /* CONFIG_DMAR_TABLE */ 174 175 static inline int dmar_device_add(void *handle) 176 { 177 return 0; 178 } 179 180 static inline int dmar_device_remove(void *handle) 181 { 182 return 0; 183 } 184 185 static inline bool dmar_platform_optin(void) 186 { 187 return false; 188 } 189 190 #endif /* CONFIG_DMAR_TABLE */ 191 192 struct irte { 193 union { 194 /* Shared between remapped and posted mode*/ 195 struct { 196 __u64 present : 1, /* 0 */ 197 fpd : 1, /* 1 */ 198 __res0 : 6, /* 2 - 6 */ 199 avail : 4, /* 8 - 11 */ 200 __res1 : 3, /* 12 - 14 */ 201 pst : 1, /* 15 */ 202 vector : 8, /* 16 - 23 */ 203 __res2 : 40; /* 24 - 63 */ 204 }; 205 206 /* Remapped mode */ 207 struct { 208 __u64 r_present : 1, /* 0 */ 209 r_fpd : 1, /* 1 */ 210 dst_mode : 1, /* 2 */ 211 redir_hint : 1, /* 3 */ 212 trigger_mode : 1, /* 4 */ 213 dlvry_mode : 3, /* 5 - 7 */ 214 r_avail : 4, /* 8 - 11 */ 215 r_res0 : 4, /* 12 - 15 */ 216 r_vector : 8, /* 16 - 23 */ 217 r_res1 : 8, /* 24 - 31 */ 218 dest_id : 32; /* 32 - 63 */ 219 }; 220 221 /* Posted mode */ 222 struct { 223 __u64 p_present : 1, /* 0 */ 224 p_fpd : 1, /* 1 */ 225 p_res0 : 6, /* 2 - 7 */ 226 p_avail : 4, /* 8 - 11 */ 227 p_res1 : 2, /* 12 - 13 */ 228 p_urgent : 1, /* 14 */ 229 p_pst : 1, /* 15 */ 230 p_vector : 8, /* 16 - 23 */ 231 p_res2 : 14, /* 24 - 37 */ 232 pda_l : 26; /* 38 - 63 */ 233 }; 234 __u64 low; 235 }; 236 237 union { 238 /* Shared between remapped and posted mode*/ 239 struct { 240 __u64 sid : 16, /* 64 - 79 */ 241 sq : 2, /* 80 - 81 */ 242 svt : 2, /* 82 - 83 */ 243 __res3 : 44; /* 84 - 127 */ 244 }; 245 246 /* Posted mode*/ 247 struct { 248 __u64 p_sid : 16, /* 64 - 79 */ 249 p_sq : 2, /* 80 - 81 */ 250 p_svt : 2, /* 82 - 83 */ 251 p_res3 : 12, /* 84 - 95 */ 252 pda_h : 32; /* 96 - 127 */ 253 }; 254 __u64 high; 255 }; 256 }; 257 258 static inline void dmar_copy_shared_irte(struct irte *dst, struct irte *src) 259 { 260 dst->present = src->present; 261 dst->fpd = src->fpd; 262 dst->avail = src->avail; 263 dst->pst = src->pst; 264 dst->vector = src->vector; 265 dst->sid = src->sid; 266 dst->sq = src->sq; 267 dst->svt = src->svt; 268 } 269 270 #define PDA_LOW_BIT 26 271 #define PDA_HIGH_BIT 32 272 273 /* Can't use the common MSI interrupt functions 274 * since DMAR is not a pci device 275 */ 276 struct irq_data; 277 extern void dmar_msi_unmask(struct irq_data *data); 278 extern void dmar_msi_mask(struct irq_data *data); 279 extern void dmar_msi_read(int irq, struct msi_msg *msg); 280 extern void dmar_msi_write(int irq, struct msi_msg *msg); 281 extern int dmar_set_interrupt(struct intel_iommu *iommu); 282 extern irqreturn_t dmar_fault(int irq, void *dev_id); 283 extern int dmar_alloc_hwirq(int id, int node, void *arg); 284 extern void dmar_free_hwirq(int irq); 285 286 #endif /* __DMAR_H__ */ 287