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_restart_log(struct amd_iommu *iommu, const char *evt_type, 20 u8 cntrl_intr, u8 cntrl_log, 21 u32 status_run_mask, u32 status_overflow_mask); 22 void amd_iommu_restart_event_logging(struct amd_iommu *iommu); 23 void amd_iommu_restart_ga_log(struct amd_iommu *iommu); 24 void amd_iommu_restart_ppr_log(struct amd_iommu *iommu); 25 void amd_iommu_set_rlookup_table(struct amd_iommu *iommu, u16 devid); 26 void iommu_feature_enable(struct amd_iommu *iommu, u8 bit); 27 void *__init iommu_alloc_4k_pages(struct amd_iommu *iommu, 28 gfp_t gfp, size_t size); 29 30 #ifdef CONFIG_AMD_IOMMU_DEBUGFS 31 void amd_iommu_debugfs_setup(struct amd_iommu *iommu); 32 #else 33 static inline void amd_iommu_debugfs_setup(struct amd_iommu *iommu) {} 34 #endif 35 36 /* Needed for interrupt remapping */ 37 int amd_iommu_prepare(void); 38 int amd_iommu_enable(void); 39 void amd_iommu_disable(void); 40 int amd_iommu_reenable(int mode); 41 int amd_iommu_enable_faulting(unsigned int cpu); 42 extern int amd_iommu_guest_ir; 43 extern enum protection_domain_mode amd_iommu_pgtable; 44 extern int amd_iommu_gpt_level; 45 extern unsigned long amd_iommu_pgsize_bitmap; 46 47 /* Protection domain ops */ 48 void amd_iommu_init_identity_domain(void); 49 struct protection_domain *protection_domain_alloc(void); 50 void protection_domain_free(struct protection_domain *domain); 51 struct iommu_domain *amd_iommu_domain_alloc_sva(struct device *dev, 52 struct mm_struct *mm); 53 void amd_iommu_domain_free(struct iommu_domain *dom); 54 int iommu_sva_set_dev_pasid(struct iommu_domain *domain, 55 struct device *dev, ioasid_t pasid, 56 struct iommu_domain *old); 57 void amd_iommu_remove_dev_pasid(struct device *dev, ioasid_t pasid, 58 struct iommu_domain *domain); 59 60 /* SVA/PASID */ 61 bool amd_iommu_pasid_supported(void); 62 63 /* IOPF */ 64 int amd_iommu_iopf_init(struct amd_iommu *iommu); 65 void amd_iommu_iopf_uninit(struct amd_iommu *iommu); 66 void amd_iommu_page_response(struct device *dev, struct iopf_fault *evt, 67 struct iommu_page_response *resp); 68 int amd_iommu_iopf_add_device(struct amd_iommu *iommu, 69 struct iommu_dev_data *dev_data); 70 void amd_iommu_iopf_remove_device(struct amd_iommu *iommu, 71 struct iommu_dev_data *dev_data); 72 73 /* GCR3 setup */ 74 int amd_iommu_set_gcr3(struct iommu_dev_data *dev_data, 75 ioasid_t pasid, unsigned long gcr3); 76 int amd_iommu_clear_gcr3(struct iommu_dev_data *dev_data, ioasid_t pasid); 77 78 /* PPR */ 79 int __init amd_iommu_alloc_ppr_log(struct amd_iommu *iommu); 80 void __init amd_iommu_free_ppr_log(struct amd_iommu *iommu); 81 void amd_iommu_enable_ppr_log(struct amd_iommu *iommu); 82 void amd_iommu_poll_ppr_log(struct amd_iommu *iommu); 83 int amd_iommu_complete_ppr(struct device *dev, u32 pasid, int status, int tag); 84 85 /* 86 * This function flushes all internal caches of 87 * the IOMMU used by this driver. 88 */ 89 void amd_iommu_flush_all_caches(struct amd_iommu *iommu); 90 void amd_iommu_update_and_flush_device_table(struct protection_domain *domain); 91 void amd_iommu_domain_flush_pages(struct protection_domain *domain, 92 u64 address, size_t size); 93 void amd_iommu_dev_flush_pasid_pages(struct iommu_dev_data *dev_data, 94 ioasid_t pasid, u64 address, size_t size); 95 96 #ifdef CONFIG_IRQ_REMAP 97 int amd_iommu_create_irq_domain(struct amd_iommu *iommu); 98 #else 99 static inline int amd_iommu_create_irq_domain(struct amd_iommu *iommu) 100 { 101 return 0; 102 } 103 #endif 104 105 static inline bool is_rd890_iommu(struct pci_dev *pdev) 106 { 107 return (pdev->vendor == PCI_VENDOR_ID_ATI) && 108 (pdev->device == PCI_DEVICE_ID_RD890_IOMMU); 109 } 110 111 static inline bool check_feature(u64 mask) 112 { 113 return (amd_iommu_efr & mask); 114 } 115 116 static inline bool check_feature2(u64 mask) 117 { 118 return (amd_iommu_efr2 & mask); 119 } 120 121 static inline bool amd_iommu_v2_pgtbl_supported(void) 122 { 123 return (check_feature(FEATURE_GIOSUP) && check_feature(FEATURE_GT)); 124 } 125 126 static inline bool amd_iommu_gt_ppr_supported(void) 127 { 128 return (amd_iommu_v2_pgtbl_supported() && 129 check_feature(FEATURE_PPR) && 130 check_feature(FEATURE_EPHSUP)); 131 } 132 133 static inline u64 iommu_virt_to_phys(void *vaddr) 134 { 135 return (u64)__sme_set(virt_to_phys(vaddr)); 136 } 137 138 static inline void *iommu_phys_to_virt(unsigned long paddr) 139 { 140 return phys_to_virt(__sme_clr(paddr)); 141 } 142 143 static inline int get_pci_sbdf_id(struct pci_dev *pdev) 144 { 145 int seg = pci_domain_nr(pdev->bus); 146 u16 devid = pci_dev_id(pdev); 147 148 return PCI_SEG_DEVID_TO_SBDF(seg, devid); 149 } 150 151 /* 152 * This must be called after device probe completes. During probe 153 * use rlookup_amd_iommu() get the iommu. 154 */ 155 static inline struct amd_iommu *get_amd_iommu_from_dev(struct device *dev) 156 { 157 return iommu_get_iommu_dev(dev, struct amd_iommu, iommu); 158 } 159 160 /* This must be called after device probe completes. */ 161 static inline struct amd_iommu *get_amd_iommu_from_dev_data(struct iommu_dev_data *dev_data) 162 { 163 return iommu_get_iommu_dev(dev_data->dev, struct amd_iommu, iommu); 164 } 165 166 static inline struct protection_domain *to_pdomain(struct iommu_domain *dom) 167 { 168 return container_of(dom, struct protection_domain, domain); 169 } 170 171 bool translation_pre_enabled(struct amd_iommu *iommu); 172 int __init add_special_device(u8 type, u8 id, u32 *devid, bool cmd_line); 173 174 #ifdef CONFIG_DMI 175 void amd_iommu_apply_ivrs_quirks(void); 176 #else 177 static inline void amd_iommu_apply_ivrs_quirks(void) { } 178 #endif 179 180 void amd_iommu_domain_set_pgtable(struct protection_domain *domain, 181 u64 *root, int mode); 182 struct dev_table_entry *get_dev_table(struct amd_iommu *iommu); 183 184 #endif 185 186 struct dev_table_entry *amd_iommu_get_ivhd_dte_flags(u16 segid, u16 devid); 187 struct iommu_dev_data *search_dev_data(struct amd_iommu *iommu, u16 devid); 188