drivers/iommu/amd_iommu_proto.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 _ASM_X86_AMD_IOMMU_PROTO_H
   8 #define _ASM_X86_AMD_IOMMU_PROTO_H
   9
  10 #include "amd_iommu_types.h"
  11
  12 extern int amd_iommu_get_num_iommus(void);
  13 extern int amd_iommu_init_dma_ops(void);
  14 extern int amd_iommu_init_passthrough(void);
  15 extern irqreturn_t amd_iommu_int_thread(int irq, void *data);
  16 extern irqreturn_t amd_iommu_int_handler(int irq, void *data);
  17 extern void amd_iommu_apply_erratum_63(u16 devid);
  18 extern void amd_iommu_reset_cmd_buffer(struct amd_iommu *iommu);
  19 extern int amd_iommu_init_devices(void);
  20 extern void amd_iommu_uninit_devices(void);
  21 extern void amd_iommu_init_notifier(void);
  22 extern int amd_iommu_init_api(void);
  23
  24 #ifdef CONFIG_AMD_IOMMU_DEBUGFS
  25 void amd_iommu_debugfs_setup(struct amd_iommu *iommu);
  26 #else
  27 static inline void amd_iommu_debugfs_setup(struct amd_iommu *iommu) {}
  28 #endif
  29
  30 /* Needed for interrupt remapping */
  31 extern int amd_iommu_prepare(void);
  32 extern int amd_iommu_enable(void);
  33 extern void amd_iommu_disable(void);
  34 extern int amd_iommu_reenable(int);
  35 extern int amd_iommu_enable_faulting(void);
  36 extern int amd_iommu_guest_ir;
  37
  38 /* IOMMUv2 specific functions */
  39 struct iommu_domain;
  40
  41 extern bool amd_iommu_v2_supported(void);
  42 extern int amd_iommu_register_ppr_notifier(struct notifier_block *nb);
  43 extern int amd_iommu_unregister_ppr_notifier(struct notifier_block *nb);
  44 extern void amd_iommu_domain_direct_map(struct iommu_domain *dom);
  45 extern int amd_iommu_domain_enable_v2(struct iommu_domain *dom, int pasids);
  46 extern int amd_iommu_flush_page(struct iommu_domain *dom, int pasid,
  47                                 u64 address);
  48 extern int amd_iommu_flush_tlb(struct iommu_domain *dom, int pasid);
  49 extern int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, int pasid,
  50                                      unsigned long cr3);
  51 extern int amd_iommu_domain_clear_gcr3(struct iommu_domain *dom, int pasid);
  52 extern struct iommu_domain *amd_iommu_get_v2_domain(struct pci_dev *pdev);
  53
  54 #ifdef CONFIG_IRQ_REMAP
  55 extern int amd_iommu_create_irq_domain(struct amd_iommu *iommu);
  56 #else
  57 static inline int amd_iommu_create_irq_domain(struct amd_iommu *iommu)
  58 {
  59         return 0;
  60 }
  61 #endif
  62
  63 #define PPR_SUCCESS                     0x0
  64 #define PPR_INVALID                     0x1
  65 #define PPR_FAILURE                     0xf
  66
  67 extern int amd_iommu_complete_ppr(struct pci_dev *pdev, int pasid,
  68                                   int status, int tag);
  69
  70 static inline bool is_rd890_iommu(struct pci_dev *pdev)
  71 {
  72         return (pdev->vendor == PCI_VENDOR_ID_ATI) &&
  73                (pdev->device == PCI_DEVICE_ID_RD890_IOMMU);
  74 }
  75
  76 static inline bool iommu_feature(struct amd_iommu *iommu, u64 f)
  77 {
  78         if (!(iommu->cap & (1 << IOMMU_CAP_EFR)))
  79                 return false;
  80
  81         return !!(iommu->features & f);
  82 }
  83
  84 static inline u64 iommu_virt_to_phys(void *vaddr)
  85 {
  86         return (u64)__sme_set(virt_to_phys(vaddr));
  87 }
  88
  89 static inline void *iommu_phys_to_virt(unsigned long paddr)
  90 {
  91         return phys_to_virt(__sme_clr(paddr));
  92 }
  93
  94 extern bool translation_pre_enabled(struct amd_iommu *iommu);
  95 extern struct iommu_dev_data *get_dev_data(struct device *dev);
  96 #endif /* _ASM_X86_AMD_IOMMU_PROTO_H  */