1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2009-2010 Advanced Micro Devices, Inc. 4 * Author: Joerg Roedel <jroedel@suse.de> 5 */ 6 7 #ifndef AMD_IOMMU_H 8 #define AMD_IOMMU_H 9 10 #include <linux/iommu.h> 11 12 #include "amd_iommu_types.h" 13 14 irqreturn_t amd_iommu_int_thread(int irq, void *data); 15 irqreturn_t amd_iommu_int_thread_evtlog(int irq, void *data); 16 irqreturn_t amd_iommu_int_thread_pprlog(int irq, void *data); 17 irqreturn_t amd_iommu_int_thread_galog(int irq, void *data); 18 irqreturn_t amd_iommu_int_handler(int irq, void *data); 19 void amd_iommu_apply_erratum_63(struct amd_iommu *iommu, u16 devid); 20 void amd_iommu_restart_log(struct amd_iommu *iommu, const char *evt_type, 21 u8 cntrl_intr, u8 cntrl_log, 22 u32 status_run_mask, u32 status_overflow_mask); 23 void amd_iommu_restart_event_logging(struct amd_iommu *iommu); 24 void amd_iommu_restart_ga_log(struct amd_iommu *iommu); 25 void amd_iommu_restart_ppr_log(struct amd_iommu *iommu); 26 void amd_iommu_set_rlookup_table(struct amd_iommu *iommu, u16 devid); 27 void iommu_feature_enable(struct amd_iommu *iommu, u8 bit); 28 void *__init iommu_alloc_4k_pages(struct amd_iommu *iommu, 29 gfp_t gfp, size_t size); 30 31 #ifdef CONFIG_AMD_IOMMU_DEBUGFS 32 void amd_iommu_debugfs_setup(struct amd_iommu *iommu); 33 #else 34 static inline void amd_iommu_debugfs_setup(struct amd_iommu *iommu) {} 35 #endif 36 37 /* Needed for interrupt remapping */ 38 int amd_iommu_prepare(void); 39 int amd_iommu_enable(void); 40 void amd_iommu_disable(void); 41 int amd_iommu_reenable(int mode); 42 int amd_iommu_enable_faulting(unsigned int cpu); 43 extern int amd_iommu_guest_ir; 44 extern enum io_pgtable_fmt amd_iommu_pgtable; 45 extern int amd_iommu_gpt_level; 46 extern unsigned long amd_iommu_pgsize_bitmap; 47 48 /* Protection domain ops */ 49 void amd_iommu_init_identity_domain(void); 50 struct protection_domain *protection_domain_alloc(unsigned int type, int nid); 51 void protection_domain_free(struct protection_domain *domain); 52 struct iommu_domain *amd_iommu_domain_alloc_sva(struct device *dev, 53 struct mm_struct *mm); 54 void amd_iommu_domain_free(struct iommu_domain *dom); 55 int iommu_sva_set_dev_pasid(struct iommu_domain *domain, 56 struct device *dev, ioasid_t pasid, 57 struct iommu_domain *old); 58 void amd_iommu_remove_dev_pasid(struct device *dev, ioasid_t pasid, 59 struct iommu_domain *domain); 60 61 /* SVA/PASID */ 62 bool amd_iommu_pasid_supported(void); 63 64 /* IOPF */ 65 int amd_iommu_iopf_init(struct amd_iommu *iommu); 66 void amd_iommu_iopf_uninit(struct amd_iommu *iommu); 67 void amd_iommu_page_response(struct device *dev, struct iopf_fault *evt, 68 struct iommu_page_response *resp); 69 int amd_iommu_iopf_add_device(struct amd_iommu *iommu, 70 struct iommu_dev_data *dev_data); 71 void amd_iommu_iopf_remove_device(struct amd_iommu *iommu, 72 struct iommu_dev_data *dev_data); 73 74 /* GCR3 setup */ 75 int amd_iommu_set_gcr3(struct iommu_dev_data *dev_data, 76 ioasid_t pasid, unsigned long gcr3); 77 int amd_iommu_clear_gcr3(struct iommu_dev_data *dev_data, ioasid_t pasid); 78 79 /* PPR */ 80 int __init amd_iommu_alloc_ppr_log(struct amd_iommu *iommu); 81 void __init amd_iommu_free_ppr_log(struct amd_iommu *iommu); 82 void amd_iommu_enable_ppr_log(struct amd_iommu *iommu); 83 void amd_iommu_poll_ppr_log(struct amd_iommu *iommu); 84 int amd_iommu_complete_ppr(struct device *dev, u32 pasid, int status, int tag); 85 86 /* 87 * This function flushes all internal caches of 88 * the IOMMU used by this driver. 89 */ 90 void amd_iommu_flush_all_caches(struct amd_iommu *iommu); 91 void amd_iommu_update_and_flush_device_table(struct protection_domain *domain); 92 void amd_iommu_domain_update(struct protection_domain *domain); 93 void amd_iommu_domain_flush_pages(struct protection_domain *domain, 94 u64 address, size_t size); 95 void amd_iommu_dev_flush_pasid_pages(struct iommu_dev_data *dev_data, 96 ioasid_t pasid, u64 address, size_t size); 97 98 #ifdef CONFIG_IRQ_REMAP 99 int amd_iommu_create_irq_domain(struct amd_iommu *iommu); 100 #else 101 static inline int amd_iommu_create_irq_domain(struct amd_iommu *iommu) 102 { 103 return 0; 104 } 105 #endif 106 107 static inline bool is_rd890_iommu(struct pci_dev *pdev) 108 { 109 return (pdev->vendor == PCI_VENDOR_ID_ATI) && 110 (pdev->device == PCI_DEVICE_ID_RD890_IOMMU); 111 } 112 113 static inline bool check_feature(u64 mask) 114 { 115 return (amd_iommu_efr & mask); 116 } 117 118 static inline bool check_feature2(u64 mask) 119 { 120 return (amd_iommu_efr2 & mask); 121 } 122 123 static inline bool amd_iommu_v2_pgtbl_supported(void) 124 { 125 return (check_feature(FEATURE_GIOSUP) && check_feature(FEATURE_GT)); 126 } 127 128 static inline bool amd_iommu_gt_ppr_supported(void) 129 { 130 return (amd_iommu_v2_pgtbl_supported() && 131 check_feature(FEATURE_PPR) && 132 check_feature(FEATURE_EPHSUP)); 133 } 134 135 static inline u64 iommu_virt_to_phys(void *vaddr) 136 { 137 return (u64)__sme_set(virt_to_phys(vaddr)); 138 } 139 140 static inline void *iommu_phys_to_virt(unsigned long paddr) 141 { 142 return phys_to_virt(__sme_clr(paddr)); 143 } 144 145 static inline int get_pci_sbdf_id(struct pci_dev *pdev) 146 { 147 int seg = pci_domain_nr(pdev->bus); 148 u16 devid = pci_dev_id(pdev); 149 150 return PCI_SEG_DEVID_TO_SBDF(seg, devid); 151 } 152 153 /* 154 * This must be called after device probe completes. During probe 155 * use rlookup_amd_iommu() get the iommu. 156 */ 157 static inline struct amd_iommu *get_amd_iommu_from_dev(struct device *dev) 158 { 159 return iommu_get_iommu_dev(dev, struct amd_iommu, iommu); 160 } 161 162 /* This must be called after device probe completes. */ 163 static inline struct amd_iommu *get_amd_iommu_from_dev_data(struct iommu_dev_data *dev_data) 164 { 165 return iommu_get_iommu_dev(dev_data->dev, struct amd_iommu, iommu); 166 } 167 168 static inline struct protection_domain *to_pdomain(struct iommu_domain *dom) 169 { 170 return container_of(dom, struct protection_domain, domain); 171 } 172 173 bool translation_pre_enabled(struct amd_iommu *iommu); 174 int __init add_special_device(u8 type, u8 id, u32 *devid, bool cmd_line); 175 176 #ifdef CONFIG_DMI 177 void amd_iommu_apply_ivrs_quirks(void); 178 #else 179 static inline void amd_iommu_apply_ivrs_quirks(void) { } 180 #endif 181 182 void amd_iommu_domain_set_pgtable(struct protection_domain *domain, 183 u64 *root, int mode); 184 struct dev_table_entry *get_dev_table(struct amd_iommu *iommu); 185 186 #endif 187