drivers/iommu/amd/amd_iommu.h

   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 int amd_iommu_get_num_iommus(void);
  15 extern int amd_iommu_init_dma_ops(void);
  16 extern int amd_iommu_init_passthrough(void);
  17 extern irqreturn_t amd_iommu_int_thread(int irq, void *data);
  18 extern irqreturn_t amd_iommu_int_handler(int irq, void *data);
  19 extern void amd_iommu_apply_erratum_63(u16 devid);
  20 extern void amd_iommu_reset_cmd_buffer(struct amd_iommu *iommu);
  21 extern int amd_iommu_init_devices(void);
  22 extern void amd_iommu_uninit_devices(void);
  23 extern void amd_iommu_init_notifier(void);
  24 extern int amd_iommu_init_api(void);
  25
  26 #ifdef CONFIG_AMD_IOMMU_DEBUGFS
  27 void amd_iommu_debugfs_setup(struct amd_iommu *iommu);
  28 #else
  29 static inline void amd_iommu_debugfs_setup(struct amd_iommu *iommu) {}
  30 #endif
  31
  32 /* Needed for interrupt remapping */
  33 extern int amd_iommu_prepare(void);
  34 extern int amd_iommu_enable(void);
  35 extern void amd_iommu_disable(void);
  36 extern int amd_iommu_reenable(int);
  37 extern int amd_iommu_enable_faulting(void);
  38 extern int amd_iommu_guest_ir;
  39
  40 /* IOMMUv2 specific functions */
  41 struct iommu_domain;
  42
  43 extern bool amd_iommu_v2_supported(void);
  44 extern struct amd_iommu *get_amd_iommu(unsigned int idx);
  45 extern u8 amd_iommu_pc_get_max_banks(unsigned int idx);
  46 extern bool amd_iommu_pc_supported(void);
  47 extern u8 amd_iommu_pc_get_max_counters(unsigned int idx);
  48 extern int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
  49                                 u8 fxn, u64 *value);
  50 extern int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
  51                                 u8 fxn, u64 *value);
  52
  53 extern int amd_iommu_register_ppr_notifier(struct notifier_block *nb);
  54 extern int amd_iommu_unregister_ppr_notifier(struct notifier_block *nb);
  55 extern void amd_iommu_domain_direct_map(struct iommu_domain *dom);
  56 extern int amd_iommu_domain_enable_v2(struct iommu_domain *dom, int pasids);
  57 extern int amd_iommu_flush_page(struct iommu_domain *dom, u32 pasid,
  58                                 u64 address);
  59 extern int amd_iommu_flush_tlb(struct iommu_domain *dom, u32 pasid);
  60 extern int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, u32 pasid,
  61                                      unsigned long cr3);
  62 extern int amd_iommu_domain_clear_gcr3(struct iommu_domain *dom, u32 pasid);
  63 extern struct iommu_domain *amd_iommu_get_v2_domain(struct pci_dev *pdev);
  64
  65 #ifdef CONFIG_IRQ_REMAP
  66 extern int amd_iommu_create_irq_domain(struct amd_iommu *iommu);
  67 #else
  68 static inline int amd_iommu_create_irq_domain(struct amd_iommu *iommu)
  69 {
  70         return 0;
  71 }
  72 #endif
  73
  74 #define PPR_SUCCESS                     0x0
  75 #define PPR_INVALID                     0x1
  76 #define PPR_FAILURE                     0xf
  77
  78 extern int amd_iommu_complete_ppr(struct pci_dev *pdev, u32 pasid,
  79                                   int status, int tag);
  80
  81 static inline bool is_rd890_iommu(struct pci_dev *pdev)
  82 {
  83         return (pdev->vendor == PCI_VENDOR_ID_ATI) &&
  84                (pdev->device == PCI_DEVICE_ID_RD890_IOMMU);
  85 }
  86
  87 static inline bool iommu_feature(struct amd_iommu *iommu, u64 f)
  88 {
  89         if (!(iommu->cap & (1 << IOMMU_CAP_EFR)))
  90                 return false;
  91
  92         return !!(iommu->features & f);
  93 }
  94
  95 static inline u64 iommu_virt_to_phys(void *vaddr)
  96 {
  97         return (u64)__sme_set(virt_to_phys(vaddr));
  98 }
  99
 100 static inline void *iommu_phys_to_virt(unsigned long paddr)
 101 {
 102         return phys_to_virt(__sme_clr(paddr));
 103 }
 104
 105 extern bool translation_pre_enabled(struct amd_iommu *iommu);
 106 extern bool amd_iommu_is_attach_deferred(struct iommu_domain *domain,
 107                                          struct device *dev);
 108 extern int __init add_special_device(u8 type, u8 id, u16 *devid,
 109                                      bool cmd_line);
 110
 111 #ifdef CONFIG_DMI
 112 void amd_iommu_apply_ivrs_quirks(void);
 113 #else
 114 static inline void amd_iommu_apply_ivrs_quirks(void) { }
 115 #endif
 116
 117 #endif