LXR linux/drivers/iommu/amd_iommu

   1/*
   2 * Copyright (C) 2009-2010 Advanced Micro Devices, Inc.
   3 * Author: Joerg Roedel <jroedel@suse.de>
   4 *
   5 * This program is free software; you can redistribute it and/or modify it
   6 * under the terms of the GNU General Public License version 2 as published
   7 * by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, write to the Free Software
  16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  17 */
  18
  19#ifndef _ASM_X86_AMD_IOMMU_PROTO_H
  20#define _ASM_X86_AMD_IOMMU_PROTO_H
  21
  22#include "amd_iommu_types.h"
  23
  24extern int amd_iommu_get_num_iommus(void);
  25extern int amd_iommu_init_dma_ops(void);
  26extern int amd_iommu_init_passthrough(void);
  27extern irqreturn_t amd_iommu_int_thread(int irq, void *data);
  28extern irqreturn_t amd_iommu_int_handler(int irq, void *data);
  29extern void amd_iommu_apply_erratum_63(u16 devid);
  30extern void amd_iommu_reset_cmd_buffer(struct amd_iommu *iommu);
  31extern int amd_iommu_init_devices(void);
  32extern void amd_iommu_uninit_devices(void);
  33extern void amd_iommu_init_notifier(void);
  34extern int amd_iommu_init_api(void);
  35
  36/* Needed for interrupt remapping */
  37extern int amd_iommu_prepare(void);
  38extern int amd_iommu_enable(void);
  39extern void amd_iommu_disable(void);
  40extern int amd_iommu_reenable(int);
  41extern int amd_iommu_enable_faulting(void);
  42extern int amd_iommu_guest_ir;
  43
  44/* IOMMUv2 specific functions */
  45struct iommu_domain;
  46
  47extern bool amd_iommu_v2_supported(void);
  48extern int amd_iommu_register_ppr_notifier(struct notifier_block *nb);
  49extern int amd_iommu_unregister_ppr_notifier(struct notifier_block *nb);
  50extern void amd_iommu_domain_direct_map(struct iommu_domain *dom);
  51extern int amd_iommu_domain_enable_v2(struct iommu_domain *dom, int pasids);
  52extern int amd_iommu_flush_page(struct iommu_domain *dom, int pasid,
  53                                u64 address);
  54extern int amd_iommu_flush_tlb(struct iommu_domain *dom, int pasid);
  55extern int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, int pasid,
  56                                     unsigned long cr3);
  57extern int amd_iommu_domain_clear_gcr3(struct iommu_domain *dom, int pasid);
  58extern struct iommu_domain *amd_iommu_get_v2_domain(struct pci_dev *pdev);
  59
  60#ifdef CONFIG_IRQ_REMAP
  61extern int amd_iommu_create_irq_domain(struct amd_iommu *iommu);
  62#else
  63static inline int amd_iommu_create_irq_domain(struct amd_iommu *iommu)
  64{
  65        return 0;
  66}
  67#endif
  68
  69#define PPR_SUCCESS                     0x0
  70#define PPR_INVALID                     0x1
  71#define PPR_FAILURE                     0xf
  72
  73extern int amd_iommu_complete_ppr(struct pci_dev *pdev, int pasid,
  74                                  int status, int tag);
  75
  76static inline bool is_rd890_iommu(struct pci_dev *pdev)
  77{
  78        return (pdev->vendor == PCI_VENDOR_ID_ATI) &&
  79               (pdev->device == PCI_DEVICE_ID_RD890_IOMMU);
  80}
  81
  82static inline bool iommu_feature(struct amd_iommu *iommu, u64 f)
  83{
  84        if (!(iommu->cap & (1 << IOMMU_CAP_EFR)))
  85                return false;
  86
  87        return !!(iommu->features & f);
  88}
  89
  90static inline u64 iommu_virt_to_phys(void *vaddr)
  91{
  92        return (u64)__sme_set(virt_to_phys(vaddr));
  93}
  94
  95static inline void *iommu_phys_to_virt(unsigned long paddr)
  96{
  97        return phys_to_virt(__sme_clr(paddr));
  98}
  99
 100extern bool translation_pre_enabled(struct amd_iommu *iommu);
 101extern struct iommu_dev_data *get_dev_data(struct device *dev);
 102#endif /* _ASM_X86_AMD_IOMMU_PROTO_H  */
 103