LXR linux/drivers/iommu/amd_iommu

   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
  12extern int amd_iommu_get_num_iommus(void);
  13extern int amd_iommu_init_dma_ops(void);
  14extern int amd_iommu_init_passthrough(void);
  15extern irqreturn_t amd_iommu_int_thread(int irq, void *data);
  16extern irqreturn_t amd_iommu_int_handler(int irq, void *data);
  17extern void amd_iommu_apply_erratum_63(u16 devid);
  18extern void amd_iommu_reset_cmd_buffer(struct amd_iommu *iommu);
  19extern int amd_iommu_init_devices(void);
  20extern void amd_iommu_uninit_devices(void);
  21extern void amd_iommu_init_notifier(void);
  22extern int amd_iommu_init_api(void);
  23
  24#ifdef CONFIG_AMD_IOMMU_DEBUGFS
  25void amd_iommu_debugfs_setup(struct amd_iommu *iommu);
  26#else
  27static inline void amd_iommu_debugfs_setup(struct amd_iommu *iommu) {}
  28#endif
  29
  30/* Needed for interrupt remapping */
  31extern int amd_iommu_prepare(void);
  32extern int amd_iommu_enable(void);
  33extern void amd_iommu_disable(void);
  34extern int amd_iommu_reenable(int);
  35extern int amd_iommu_enable_faulting(void);
  36extern int amd_iommu_guest_ir;
  37
  38/* IOMMUv2 specific functions */
  39struct iommu_domain;
  40
  41extern bool amd_iommu_v2_supported(void);
  42extern int amd_iommu_register_ppr_notifier(struct notifier_block *nb);
  43extern int amd_iommu_unregister_ppr_notifier(struct notifier_block *nb);
  44extern void amd_iommu_domain_direct_map(struct iommu_domain *dom);
  45extern int amd_iommu_domain_enable_v2(struct iommu_domain *dom, int pasids);
  46extern int amd_iommu_flush_page(struct iommu_domain *dom, int pasid,
  47                                u64 address);
  48extern int amd_iommu_flush_tlb(struct iommu_domain *dom, int pasid);
  49extern int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, int pasid,
  50                                     unsigned long cr3);
  51extern int amd_iommu_domain_clear_gcr3(struct iommu_domain *dom, int pasid);
  52extern struct iommu_domain *amd_iommu_get_v2_domain(struct pci_dev *pdev);
  53
  54#ifdef CONFIG_IRQ_REMAP
  55extern int amd_iommu_create_irq_domain(struct amd_iommu *iommu);
  56#else
  57static 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
  67extern int amd_iommu_complete_ppr(struct pci_dev *pdev, int pasid,
  68                                  int status, int tag);
  69
  70static 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
  76static 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
  84static inline u64 iommu_virt_to_phys(void *vaddr)
  85{
  86        return (u64)__sme_set(virt_to_phys(vaddr));
  87}
  88
  89static inline void *iommu_phys_to_virt(unsigned long paddr)
  90{
  91        return phys_to_virt(__sme_clr(paddr));
  92}
  93
  94extern bool translation_pre_enabled(struct amd_iommu *iommu);
  95extern struct iommu_dev_data *get_dev_data(struct device *dev);
  96#endif /* _ASM_X86_AMD_IOMMU_PROTO_H  */
  97