mirror of https://github.com/acidanthera/audk.git
160 lines
4.0 KiB
C
160 lines
4.0 KiB
C
/** @file
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The definition for DMA access Library.
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Copyright (c) 2017 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef __DMA_ACCESS_LIB_H__
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#define __DMA_ACCESS_LIB_H__
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typedef struct {
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EFI_ACPI_DMAR_HEADER *AcpiDmarTable;
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UINT64 EngineMask;
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UINT8 HostAddressWidth;
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UINTN VTdEngineCount;
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UINT64 VTdEngineAddress[1];
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} VTD_INFO;
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/**
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Set DMA protected region.
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@param VTdInfo The VTd engine context information.
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@param EngineMask The mask of the VTd engine to be accessed.
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@param LowMemoryBase The protected low memory region base.
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@param LowMemoryLength The protected low memory region length.
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@param HighMemoryBase The protected high memory region base.
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@param HighMemoryLength The protected high memory region length.
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@retval EFI_SUCCESS The DMA protection is set.
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@retval EFI_UNSUPPORTED The DMA protection is not set.
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**/
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EFI_STATUS
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SetDmaProtectedRange (
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IN VTD_INFO *VTdInfo,
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IN UINT64 EngineMask,
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IN UINT32 LowMemoryBase,
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IN UINT32 LowMemoryLength,
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IN UINT64 HighMemoryBase,
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IN UINT64 HighMemoryLength
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);
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/**
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Diable DMA protection.
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@param VTdInfo The VTd engine context information.
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@param EngineMask The mask of the VTd engine to be accessed.
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@retval DMA protection is disabled.
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**/
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EFI_STATUS
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DisableDmaProtection (
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IN VTD_INFO *VTdInfo,
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IN UINT64 EngineMask
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);
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/**
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Return if the DMA protection is enabled.
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@param VTdInfo The VTd engine context information.
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@param EngineMask The mask of the VTd engine to be accessed.
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@retval TRUE DMA protection is enabled in at least one VTd engine.
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@retval FALSE DMA protection is disabled in all VTd engines.
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**/
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UINT64
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GetDmaProtectionEnabledEngineMask (
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IN VTD_INFO *VTdInfo,
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IN UINT64 EngineMask
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);
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/**
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Get protected low memory alignment.
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@param VTdInfo The VTd engine context information.
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@param EngineMask The mask of the VTd engine to be accessed.
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@return protected low memory alignment.
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**/
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UINT32
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GetLowMemoryAlignment (
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IN VTD_INFO *VTdInfo,
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IN UINT64 EngineMask
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);
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/**
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Get protected high memory alignment.
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@param VTdInfo The VTd engine context information.
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@param EngineMask The mask of the VTd engine to be accessed.
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@return protected high memory alignment.
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**/
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UINT64
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GetHighMemoryAlignment (
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IN VTD_INFO *VTdInfo,
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IN UINT64 EngineMask
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);
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/**
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Enable VTd translation table protection.
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@param VTdInfo The VTd engine context information.
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@param EngineMask The mask of the VTd engine to be accessed.
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**/
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VOID
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EnableVTdTranslationProtection (
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IN VTD_INFO *VTdInfo,
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IN UINT64 EngineMask
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);
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/**
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Disable VTd translation table protection.
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@param VTdInfo The VTd engine context information.
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@param EngineMask The mask of the VTd engine to be accessed.
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**/
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VOID
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DisableVTdTranslationProtection (
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IN VTD_INFO *VTdInfo,
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IN UINT64 EngineMask
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);
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/**
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Parse DMAR DRHD table.
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@param[in] AcpiDmarTable DMAR ACPI table
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@return EFI_SUCCESS The DMAR DRHD table is parsed.
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**/
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EFI_STATUS
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ParseDmarAcpiTableDrhd (
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IN EFI_ACPI_DMAR_HEADER *AcpiDmarTable
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);
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/**
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Parse DMAR DRHD table.
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@param VTdInfo The VTd engine context information.
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**/
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VOID
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ParseDmarAcpiTableRmrr (
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IN VTD_INFO *VTdInfo
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);
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/**
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Dump DMAR ACPI table.
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@param[in] Dmar DMAR ACPI table
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**/
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VOID
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DumpAcpiDMAR (
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IN EFI_ACPI_DMAR_HEADER *Dmar
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);
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extern EFI_GUID mVTdInfoGuid;
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#endif
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