drivers/iommu/amd_iommu_proto.h

   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
  24 extern int amd_iommu_init_dma_ops(void);
  25 extern int amd_iommu_init_passthrough(void);
  26 extern irqreturn_t amd_iommu_int_thread(int irq, void *data);
  27 extern irqreturn_t amd_iommu_int_handler(int irq, void *data);
  28 extern void amd_iommu_apply_erratum_63(u16 devid);
  29 extern void amd_iommu_reset_cmd_buffer(struct amd_iommu *iommu);
  30 extern int amd_iommu_init_devices(void);
  31 extern void amd_iommu_uninit_devices(void);
  32 extern void amd_iommu_init_notifier(void);
  33 extern int amd_iommu_init_api(void);
  34
  35 /* Needed for interrupt remapping */
  36 extern int amd_iommu_prepare(void);
  37 extern int amd_iommu_enable(void);
  38 extern void amd_iommu_disable(void);
  39 extern int amd_iommu_reenable(int);
  40 extern int amd_iommu_enable_faulting(void);
  41 extern int amd_iommu_guest_ir;
  42
  43 /* IOMMUv2 specific functions */
  44 struct iommu_domain;
  45
  46 extern bool amd_iommu_v2_supported(void);
  47 extern int amd_iommu_register_ppr_notifier(struct notifier_block *nb);
  48 extern int amd_iommu_unregister_ppr_notifier(struct notifier_block *nb);
  49 extern void amd_iommu_domain_direct_map(struct iommu_domain *dom);
  50 extern int amd_iommu_domain_enable_v2(struct iommu_domain *dom, int pasids);
  51 extern int amd_iommu_flush_page(struct iommu_domain *dom, int pasid,
  52                                 u64 address);
  53 extern int amd_iommu_flush_tlb(struct iommu_domain *dom, int pasid);
  54 extern int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, int pasid,
  55                                      unsigned long cr3);
  56 extern int amd_iommu_domain_clear_gcr3(struct iommu_domain *dom, int pasid);
  57 extern struct iommu_domain *amd_iommu_get_v2_domain(struct pci_dev *pdev);
  58
  59 /* IOMMU Performance Counter functions */
  60 extern bool amd_iommu_pc_supported(void);
  61 extern u8 amd_iommu_pc_get_max_banks(u16 devid);
  62 extern u8 amd_iommu_pc_get_max_counters(u16 devid);
  63 extern int amd_iommu_pc_get_set_reg_val(u16 devid, u8 bank, u8 cntr, u8 fxn,
  64                                     u64 *value, bool is_write);
  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, int 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 f)
  89 {
  90         if (!(iommu->cap & (1 << IOMMU_CAP_EFR)))
  91                 return false;
  92
  93         return !!(iommu->features & f);
  94 }
  95
  96 #endif /* _ASM_X86_AMD_IOMMU_PROTO_H  */