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 extern irqreturn_t amd_iommu_int_thread(int irq, void *data); 15 extern irqreturn_t amd_iommu_int_handler(int irq, void *data); 16 extern void amd_iommu_apply_erratum_63(u16 devid); 17 extern void amd_iommu_reset_cmd_buffer(struct amd_iommu *iommu); 18 extern int amd_iommu_init_devices(void); 19 extern void amd_iommu_uninit_devices(void); 20 extern void amd_iommu_init_notifier(void); 21 extern int amd_iommu_init_api(void); 22 23 #ifdef CONFIG_AMD_IOMMU_DEBUGFS 24 void amd_iommu_debugfs_setup(struct amd_iommu *iommu); 25 #else 26 static inline void amd_iommu_debugfs_setup(struct amd_iommu *iommu) {} 27 #endif 28 29 /* Needed for interrupt remapping */ 30 extern int amd_iommu_prepare(void); 31 extern int amd_iommu_enable(void); 32 extern void amd_iommu_disable(void); 33 extern int amd_iommu_reenable(int); 34 extern int amd_iommu_enable_faulting(void); 35 extern int amd_iommu_guest_ir; 36 extern enum io_pgtable_fmt amd_iommu_pgtable; 37 38 /* IOMMUv2 specific functions */ 39 struct iommu_domain; 40 41 extern bool amd_iommu_v2_supported(void); 42 extern struct amd_iommu *get_amd_iommu(unsigned int idx); 43 extern u8 amd_iommu_pc_get_max_banks(unsigned int idx); 44 extern bool amd_iommu_pc_supported(void); 45 extern u8 amd_iommu_pc_get_max_counters(unsigned int idx); 46 extern int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, 47 u8 fxn, u64 *value); 48 extern int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, 49 u8 fxn, u64 *value); 50 51 extern int amd_iommu_register_ppr_notifier(struct notifier_block *nb); 52 extern int amd_iommu_unregister_ppr_notifier(struct notifier_block *nb); 53 extern void amd_iommu_domain_direct_map(struct iommu_domain *dom); 54 extern int amd_iommu_domain_enable_v2(struct iommu_domain *dom, int pasids); 55 extern int amd_iommu_flush_page(struct iommu_domain *dom, u32 pasid, 56 u64 address); 57 extern void amd_iommu_update_and_flush_device_table(struct protection_domain *domain); 58 extern void amd_iommu_domain_update(struct protection_domain *domain); 59 extern void amd_iommu_domain_flush_complete(struct protection_domain *domain); 60 extern void amd_iommu_domain_flush_tlb_pde(struct protection_domain *domain); 61 extern int amd_iommu_flush_tlb(struct iommu_domain *dom, u32 pasid); 62 extern int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, u32 pasid, 63 unsigned long cr3); 64 extern int amd_iommu_domain_clear_gcr3(struct iommu_domain *dom, u32 pasid); 65 66 #ifdef CONFIG_IRQ_REMAP 67 extern int amd_iommu_create_irq_domain(struct amd_iommu *iommu); 68 #else 69 static inline int amd_iommu_create_irq_domain(struct amd_iommu *iommu) 70 { 71 return 0; 72 } 73 #endif 74 75 #define PPR_SUCCESS 0x0 76 #define PPR_INVALID 0x1 77 #define PPR_FAILURE 0xf 78 79 extern int amd_iommu_complete_ppr(struct pci_dev *pdev, u32 pasid, 80 int status, int tag); 81 82 static inline bool is_rd890_iommu(struct pci_dev *pdev) 83 { 84 return (pdev->vendor == PCI_VENDOR_ID_ATI) && 85 (pdev->device == PCI_DEVICE_ID_RD890_IOMMU); 86 } 87 88 static inline bool iommu_feature(struct amd_iommu *iommu, u64 mask) 89 { 90 return !!(iommu->features & mask); 91 } 92 93 static inline u64 iommu_virt_to_phys(void *vaddr) 94 { 95 return (u64)__sme_set(virt_to_phys(vaddr)); 96 } 97 98 static inline void *iommu_phys_to_virt(unsigned long paddr) 99 { 100 return phys_to_virt(__sme_clr(paddr)); 101 } 102 103 static inline 104 void amd_iommu_domain_set_pt_root(struct protection_domain *domain, u64 root) 105 { 106 atomic64_set(&domain->iop.pt_root, root); 107 domain->iop.root = (u64 *)(root & PAGE_MASK); 108 domain->iop.mode = root & 7; /* lowest 3 bits encode pgtable mode */ 109 } 110 111 static inline 112 void amd_iommu_domain_clr_pt_root(struct protection_domain *domain) 113 { 114 amd_iommu_domain_set_pt_root(domain, 0); 115 } 116 117 118 extern bool translation_pre_enabled(struct amd_iommu *iommu); 119 extern bool amd_iommu_is_attach_deferred(struct iommu_domain *domain, 120 struct device *dev); 121 extern int __init add_special_device(u8 type, u8 id, u16 *devid, 122 bool cmd_line); 123 124 #ifdef CONFIG_DMI 125 void amd_iommu_apply_ivrs_quirks(void); 126 #else 127 static inline void amd_iommu_apply_ivrs_quirks(void) { } 128 #endif 129 130 extern void amd_iommu_domain_set_pgtable(struct protection_domain *domain, 131 u64 *root, int mode); 132 #endif 133