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 19struct 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 28struct intel_iommu; 29 30struct dmar_dev_scope { 31 struct device __rcu *dev; 32 u8 bus; 33 u8 devfn; 34}; 35 36#ifdef CONFIG_DMAR_TABLE 37extern struct acpi_table_header *dmar_tbl; 38struct 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 52struct dmar_pci_path { 53 u8 bus; 54 u8 device; 55 u8 function; 56}; 57 58struct 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 67extern struct rw_semaphore dmar_global_lock; 68extern 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 89static 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 106extern int dmar_table_init(void); 107extern int dmar_dev_scope_init(void); 108extern void dmar_register_bus_notifier(void); 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/* Intel IOMMU detection */ 119void 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_DMAR_DEBUG 130void dmar_fault_dump_ptes(struct intel_iommu *iommu, u16 source_id, 131 unsigned long long addr, u32 pasid); 132#else 133static 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 138extern int iommu_detected, no_iommu; 139extern int intel_iommu_init(void); 140extern void intel_iommu_shutdown(void); 141extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg); 142extern int dmar_parse_one_atsr(struct acpi_dmar_header *header, void *arg); 143extern int dmar_check_one_atsr(struct acpi_dmar_header *hdr, void *arg); 144extern int dmar_parse_one_satc(struct acpi_dmar_header *hdr, void *arg); 145extern int dmar_release_one_atsr(struct acpi_dmar_header *hdr, void *arg); 146extern int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert); 147extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info); 148#else /* !CONFIG_INTEL_IOMMU: */ 149static inline int intel_iommu_init(void) { return -ENODEV; } 150static 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 158static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info) 159{ 160 return 0; 161} 162 163static 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 170extern int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert); 171#else /* CONFIG_IRQ_REMAP */ 172static inline int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert) 173{ return 0; } 174#endif /* CONFIG_IRQ_REMAP */ 175 176extern bool dmar_platform_optin(void); 177 178#else /* CONFIG_DMAR_TABLE */ 179 180static inline int dmar_device_add(void *handle) 181{ 182 return 0; 183} 184 185static inline int dmar_device_remove(void *handle) 186{ 187 return 0; 188} 189 190static inline bool dmar_platform_optin(void) 191{ 192 return false; 193} 194 195static inline void detect_intel_iommu(void) 196{ 197} 198 199#endif /* CONFIG_DMAR_TABLE */ 200 201struct 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 274static 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 */ 292struct irq_data; 293extern void dmar_msi_unmask(struct irq_data *data); 294extern void dmar_msi_mask(struct irq_data *data); 295extern void dmar_msi_read(int irq, struct msi_msg *msg); 296extern void dmar_msi_write(int irq, struct msi_msg *msg); 297extern int dmar_set_interrupt(struct intel_iommu *iommu); 298extern irqreturn_t dmar_fault(int irq, void *dev_id); 299extern int dmar_alloc_hwirq(int id, int node, void *arg); 300extern void dmar_free_hwirq(int irq); 301 302#endif /* __DMAR_H__ */ 303