| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Copyright (c) 2006, Intel Corporation. |
| * |
| * Copyright (C) Ashok Raj <ashok.raj@intel.com> |
| * Copyright (C) Shaohua Li <shaohua.li@intel.com> |
| */ |
| |
| #ifndef __DMAR_H__ |
| #define __DMAR_H__ |
| |
| #include <linux/acpi.h> |
| #include <linux/types.h> |
| #include <linux/msi.h> |
| #include <linux/irqreturn.h> |
| #include <linux/rwsem.h> |
| #include <linux/rculist.h> |
| |
| struct acpi_dmar_header; |
| |
| #ifdef CONFIG_X86 |
| # define DMAR_UNITS_SUPPORTED MAX_IO_APICS |
| #else |
| # define DMAR_UNITS_SUPPORTED 64 |
| #endif |
| |
| /* DMAR Flags */ |
| #define DMAR_INTR_REMAP 0x1 |
| #define DMAR_X2APIC_OPT_OUT 0x2 |
| #define DMAR_PLATFORM_OPT_IN 0x4 |
| |
| struct intel_iommu; |
| |
| struct dmar_dev_scope { |
| struct device __rcu *dev; |
| u8 bus; |
| u8 devfn; |
| }; |
| |
| #ifdef CONFIG_DMAR_TABLE |
| extern struct acpi_table_header *dmar_tbl; |
| struct dmar_drhd_unit { |
| struct list_head list; /* list of drhd units */ |
| struct acpi_dmar_header *hdr; /* ACPI header */ |
| u64 reg_base_addr; /* register base address*/ |
| struct dmar_dev_scope *devices;/* target device array */ |
| int devices_cnt; /* target device count */ |
| u16 segment; /* PCI domain */ |
| u8 ignored:1; /* ignore drhd */ |
| u8 include_all:1; |
| u8 gfx_dedicated:1; /* graphic dedicated */ |
| struct intel_iommu *iommu; |
| }; |
| |
| struct dmar_pci_path { |
| u8 bus; |
| u8 device; |
| u8 function; |
| }; |
| |
| struct dmar_pci_notify_info { |
| struct pci_dev *dev; |
| unsigned long event; |
| int bus; |
| u16 seg; |
| u16 level; |
| struct dmar_pci_path path[]; |
| } __attribute__((packed)); |
| |
| extern struct rw_semaphore dmar_global_lock; |
| extern struct list_head dmar_drhd_units; |
| |
| #define for_each_drhd_unit(drhd) \ |
| list_for_each_entry_rcu(drhd, &dmar_drhd_units, list, \ |
| dmar_rcu_check()) |
| |
| #define for_each_active_drhd_unit(drhd) \ |
| list_for_each_entry_rcu(drhd, &dmar_drhd_units, list, \ |
| dmar_rcu_check()) \ |
| if (drhd->ignored) {} else |
| |
| #define for_each_active_iommu(i, drhd) \ |
| list_for_each_entry_rcu(drhd, &dmar_drhd_units, list, \ |
| dmar_rcu_check()) \ |
| if (i=drhd->iommu, drhd->ignored) {} else |
| |
| #define for_each_iommu(i, drhd) \ |
| list_for_each_entry_rcu(drhd, &dmar_drhd_units, list, \ |
| dmar_rcu_check()) \ |
| if (i=drhd->iommu, 0) {} else |
| |
| static inline bool dmar_rcu_check(void) |
| { |
| return rwsem_is_locked(&dmar_global_lock) || |
| system_state == SYSTEM_BOOTING; |
| } |
| |
| #define dmar_rcu_dereference(p) rcu_dereference_check((p), dmar_rcu_check()) |
| |
| #define for_each_dev_scope(devs, cnt, i, tmp) \ |
| for ((i) = 0; ((tmp) = (i) < (cnt) ? \ |
| dmar_rcu_dereference((devs)[(i)].dev) : NULL, (i) < (cnt)); \ |
| (i)++) |
| |
| #define for_each_active_dev_scope(devs, cnt, i, tmp) \ |
| for_each_dev_scope((devs), (cnt), (i), (tmp)) \ |
| if (!(tmp)) { continue; } else |
| |
| extern int dmar_table_init(void); |
| extern int dmar_dev_scope_init(void); |
| extern void dmar_register_bus_notifier(void); |
| extern int dmar_parse_dev_scope(void *start, void *end, int *cnt, |
| struct dmar_dev_scope **devices, u16 segment); |
| extern void *dmar_alloc_dev_scope(void *start, void *end, int *cnt); |
| extern void dmar_free_dev_scope(struct dmar_dev_scope **devices, int *cnt); |
| extern int dmar_insert_dev_scope(struct dmar_pci_notify_info *info, |
| void *start, void*end, u16 segment, |
| struct dmar_dev_scope *devices, |
| int devices_cnt); |
| extern int dmar_remove_dev_scope(struct dmar_pci_notify_info *info, |
| u16 segment, struct dmar_dev_scope *devices, |
| int count); |
| /* Intel IOMMU detection */ |
| extern int detect_intel_iommu(void); |
| extern int enable_drhd_fault_handling(void); |
| extern int dmar_device_add(acpi_handle handle); |
| extern int dmar_device_remove(acpi_handle handle); |
| |
| static inline int dmar_res_noop(struct acpi_dmar_header *hdr, void *arg) |
| { |
| return 0; |
| } |
| |
| #ifdef CONFIG_DMAR_DEBUG |
| void dmar_fault_dump_ptes(struct intel_iommu *iommu, u16 source_id, |
| unsigned long long addr, u32 pasid); |
| #else |
| static inline void dmar_fault_dump_ptes(struct intel_iommu *iommu, u16 source_id, |
| unsigned long long addr, u32 pasid) {} |
| #endif |
| |
| #ifdef CONFIG_INTEL_IOMMU |
| extern int iommu_detected, no_iommu; |
| extern int intel_iommu_init(void); |
| extern void intel_iommu_shutdown(void); |
| extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg); |
| extern int dmar_parse_one_atsr(struct acpi_dmar_header *header, void *arg); |
| extern int dmar_check_one_atsr(struct acpi_dmar_header *hdr, void *arg); |
| extern int dmar_parse_one_satc(struct acpi_dmar_header *hdr, void *arg); |
| extern int dmar_release_one_atsr(struct acpi_dmar_header *hdr, void *arg); |
| extern int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert); |
| extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info); |
| #else /* !CONFIG_INTEL_IOMMU: */ |
| static inline int intel_iommu_init(void) { return -ENODEV; } |
| static inline void intel_iommu_shutdown(void) { } |
| |
| #define dmar_parse_one_rmrr dmar_res_noop |
| #define dmar_parse_one_atsr dmar_res_noop |
| #define dmar_check_one_atsr dmar_res_noop |
| #define dmar_release_one_atsr dmar_res_noop |
| #define dmar_parse_one_satc dmar_res_noop |
| |
| static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info) |
| { |
| return 0; |
| } |
| |
| static inline int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert) |
| { |
| return 0; |
| } |
| #endif /* CONFIG_INTEL_IOMMU */ |
| |
| #ifdef CONFIG_IRQ_REMAP |
| extern int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert); |
| #else /* CONFIG_IRQ_REMAP */ |
| static inline int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert) |
| { return 0; } |
| #endif /* CONFIG_IRQ_REMAP */ |
| |
| extern bool dmar_platform_optin(void); |
| |
| #else /* CONFIG_DMAR_TABLE */ |
| |
| static inline int dmar_device_add(void *handle) |
| { |
| return 0; |
| } |
| |
| static inline int dmar_device_remove(void *handle) |
| { |
| return 0; |
| } |
| |
| static inline bool dmar_platform_optin(void) |
| { |
| return false; |
| } |
| |
| #endif /* CONFIG_DMAR_TABLE */ |
| |
| struct irte { |
| union { |
| /* Shared between remapped and posted mode*/ |
| struct { |
| __u64 present : 1, /* 0 */ |
| fpd : 1, /* 1 */ |
| __res0 : 6, /* 2 - 6 */ |
| avail : 4, /* 8 - 11 */ |
| __res1 : 3, /* 12 - 14 */ |
| pst : 1, /* 15 */ |
| vector : 8, /* 16 - 23 */ |
| __res2 : 40; /* 24 - 63 */ |
| }; |
| |
| /* Remapped mode */ |
| struct { |
| __u64 r_present : 1, /* 0 */ |
| r_fpd : 1, /* 1 */ |
| dst_mode : 1, /* 2 */ |
| redir_hint : 1, /* 3 */ |
| trigger_mode : 1, /* 4 */ |
| dlvry_mode : 3, /* 5 - 7 */ |
| r_avail : 4, /* 8 - 11 */ |
| r_res0 : 4, /* 12 - 15 */ |
| r_vector : 8, /* 16 - 23 */ |
| r_res1 : 8, /* 24 - 31 */ |
| dest_id : 32; /* 32 - 63 */ |
| }; |
| |
| /* Posted mode */ |
| struct { |
| __u64 p_present : 1, /* 0 */ |
| p_fpd : 1, /* 1 */ |
| p_res0 : 6, /* 2 - 7 */ |
| p_avail : 4, /* 8 - 11 */ |
| p_res1 : 2, /* 12 - 13 */ |
| p_urgent : 1, /* 14 */ |
| p_pst : 1, /* 15 */ |
| p_vector : 8, /* 16 - 23 */ |
| p_res2 : 14, /* 24 - 37 */ |
| pda_l : 26; /* 38 - 63 */ |
| }; |
| __u64 low; |
| }; |
| |
| union { |
| /* Shared between remapped and posted mode*/ |
| struct { |
| __u64 sid : 16, /* 64 - 79 */ |
| sq : 2, /* 80 - 81 */ |
| svt : 2, /* 82 - 83 */ |
| __res3 : 44; /* 84 - 127 */ |
| }; |
| |
| /* Posted mode*/ |
| struct { |
| __u64 p_sid : 16, /* 64 - 79 */ |
| p_sq : 2, /* 80 - 81 */ |
| p_svt : 2, /* 82 - 83 */ |
| p_res3 : 12, /* 84 - 95 */ |
| pda_h : 32; /* 96 - 127 */ |
| }; |
| __u64 high; |
| }; |
| }; |
| |
| static inline void dmar_copy_shared_irte(struct irte *dst, struct irte *src) |
| { |
| dst->present = src->present; |
| dst->fpd = src->fpd; |
| dst->avail = src->avail; |
| dst->pst = src->pst; |
| dst->vector = src->vector; |
| dst->sid = src->sid; |
| dst->sq = src->sq; |
| dst->svt = src->svt; |
| } |
| |
| #define PDA_LOW_BIT 26 |
| #define PDA_HIGH_BIT 32 |
| |
| /* Can't use the common MSI interrupt functions |
| * since DMAR is not a pci device |
| */ |
| struct irq_data; |
| extern void dmar_msi_unmask(struct irq_data *data); |
| extern void dmar_msi_mask(struct irq_data *data); |
| extern void dmar_msi_read(int irq, struct msi_msg *msg); |
| extern void dmar_msi_write(int irq, struct msi_msg *msg); |
| extern int dmar_set_interrupt(struct intel_iommu *iommu); |
| extern irqreturn_t dmar_fault(int irq, void *dev_id); |
| extern int dmar_alloc_hwirq(int id, int node, void *arg); |
| extern void dmar_free_hwirq(int irq); |
| |
| #endif /* __DMAR_H__ */ |