Omap35xxPkg/Include/Library/OmapDmaLib.h - SHIFTPHONES/android/bootable/bootloader/edk2 - Gitiles

 /** @file

   Abstractions for simple OMAP DMA. The DMA functions are modeled on
   the PCI IO protocol and follow the same rules as outlined in the UEFI specification.
   OMAP_DMA4 structure elements are described in the OMAP35xx TRM. Currently
   there is no PCI'less DMA protocol, if one existed it could be used to
   replace this library.

   Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>

   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
   which accompanies this distribution.  The full text of the license may be found at
   http://opensource.org/licenses/bsd-license.php

   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

 **/

 #ifndef __OMAP_DMA_LIB_H__
 #define __OMAP_DMA_LIB_H__

 typedef enum {
   ///
   /// A read operation from system memory by a bus master.
   ///
   MapOperationBusMasterRead,
   ///
   /// A write operation from system memory by a bus master.
   ///
   MapOperationBusMasterWrite,
   ///
   /// Provides both read and write access to system memory by both the processor and a
   /// bus master. The buffer is coherent from both the processor's and the bus master's point of view.
   ///
   MapOperationBusMasterCommonBuffer,
   MapOperationMaximum
 } DMA_MAP_OPERATION;


 // Example from DMA chapter of the OMAP35xx spec
 typedef struct {
   UINT8     DataType;                      // DMA4_CSDPi[1:0]
   UINT8     ReadPortAccessType;            // DMA4_CSDPi[8:7]
   UINT8     WritePortAccessType;           // DMA4_CSDPi[15:14]
   UINT8     SourceEndiansim;               // DMA4_CSDPi[21]
   UINT8     DestinationEndianism;          // DMA4_CSDPi[19]
   UINT8     WriteMode;                     // DMA4_CSDPi[17:16]
   UINT8     SourcePacked;                  // DMA4_CSDPi[6]
   UINT8     DestinationPacked;             // DMA4_CSDPi[13]
   UINT32    NumberOfElementPerFrame;       // DMA4_CENi
   UINT32    NumberOfFramePerTransferBlock; // DMA4_CFNi
   UINT32    SourceStartAddress;            // DMA4_CSSAi
   UINT32    DestinationStartAddress;       // DMA4_CDSAi
   UINT32    SourceElementIndex;            // DMA4_CSEi
   UINT32    SourceFrameIndex;              // DMA4_CSFi
   UINT32    DestinationElementIndex;       // DMA4_CDEi
   UINT32    DestinationFrameIndex;         // DMA4_CDFi
   UINT8     ReadPortAccessMode;            // DMA4_CCRi[13:12]
   UINT8     WritePortAccessMode;           // DMA4_CCRi[15:14]
   UINT8     ReadPriority;                  // DMA4_CCRi[6]
   UINT8     WritePriority;                 // DMA4_CCRi[23]
   UINT8     ReadRequestNumber;             // DMA4_CCRi[4:0]
   UINT8     WriteRequestNumber;            // DMA4_CCRi[20:19]
 } OMAP_DMA4;


 /**
   Configure OMAP DMA Channel

   @param  Channel               DMA Channel to configure
   @param  Dma4                  Pointer to structure used to initialize DMA registers for the Channel

   @retval EFI_SUCCESS           The range was mapped for the returned NumberOfBytes.
   @retval EFI_INVALID_PARAMETER Channel is not valid
   @retval EFI_DEVICE_ERROR      The system hardware could not map the requested information.

 **/
 EFI_STATUS
 EFIAPI
 EnableDmaChannel (
   IN  UINTN       Channel,
   IN  OMAP_DMA4   *Dma4
   );

 /**
   Turn of DMA channel configured by EnableDma().

   @param  Channel               DMA Channel to configure

   @retval EFI_SUCCESS           DMA hardware disabled
   @retval EFI_INVALID_PARAMETER Channel is not valid
   @retval EFI_DEVICE_ERROR      The system hardware could not map the requested information.

 **/
 EFI_STATUS
 EFIAPI
 DisableDmaChannel (
   IN  UINTN       Channel
   );


 /**
   Provides the DMA controller-specific addresses needed to access system memory.

   Operation is relative to the DMA bus master.

   @param  Operation             Indicates if the bus master is going to read or write to system memory.
   @param  HostAddress           The system memory address to map to the DMA controller.
   @param  NumberOfBytes         On input the number of bytes to map. On output the number of bytes
                                 that were mapped.
   @param  DeviceAddress         The resulting map address for the bus master controller to use to
                                 access the hosts HostAddress.
   @param  Mapping               A resulting value to pass to Unmap().

   @retval EFI_SUCCESS           The range was mapped for the returned NumberOfBytes.
   @retval EFI_UNSUPPORTED       The HostAddress cannot be mapped as a common buffer.
   @retval EFI_INVALID_PARAMETER One or more parameters are invalid.
   @retval EFI_OUT_OF_RESOURCES  The request could not be completed due to a lack of resources.
   @retval EFI_DEVICE_ERROR      The system hardware could not map the requested address.

 **/
 EFI_STATUS
 EFIAPI
 DmaMap (
   IN     DMA_MAP_OPERATION              Operation,
   IN     VOID                           *HostAddress,
   IN OUT UINTN                          *NumberOfBytes,
   OUT    PHYSICAL_ADDRESS               *DeviceAddress,
   OUT    VOID                           **Mapping
   );


 /**
   Completes the DmaMapBusMasterRead(), DmaMapBusMasterWrite(), or DmaMapBusMasterCommonBuffer()
   operation and releases any corresponding resources.

   @param  Mapping               The mapping value returned from DmaMap*().

   @retval EFI_SUCCESS           The range was unmapped.
   @retval EFI_DEVICE_ERROR      The data was not committed to the target system memory.

 **/
 EFI_STATUS
 EFIAPI
 DmaUnmap (
   IN  VOID                         *Mapping
   );


 /**
   Allocates pages that are suitable for an DmaMap() of type MapOperationBusMasterCommonBuffer.
   mapping.

   @param  MemoryType            The type of memory to allocate, EfiBootServicesData or
                                 EfiRuntimeServicesData.
   @param  Pages                 The number of pages to allocate.
   @param  HostAddress           A pointer to store the base system memory address of the
                                 allocated range.

                                 @retval EFI_SUCCESS           The requested memory pages were allocated.
   @retval EFI_UNSUPPORTED       Attributes is unsupported. The only legal attribute bits are
                                 MEMORY_WRITE_COMBINE and MEMORY_CACHED.
   @retval EFI_INVALID_PARAMETER One or more parameters are invalid.
   @retval EFI_OUT_OF_RESOURCES  The memory pages could not be allocated.

 **/
 EFI_STATUS
 EFIAPI
 DmaAllocateBuffer (
   IN  EFI_MEMORY_TYPE              MemoryType,
   IN  UINTN                        Pages,
   OUT VOID                         **HostAddress
   );


 /**
   Frees memory that was allocated with DmaAllocateBuffer().

   @param  Pages                 The number of pages to free.
   @param  HostAddress           The base system memory address of the allocated range.

   @retval EFI_SUCCESS           The requested memory pages were freed.
   @retval EFI_INVALID_PARAMETER The memory range specified by HostAddress and Pages
                                 was not allocated with DmaAllocateBuffer().

 **/
 EFI_STATUS
 EFIAPI
 DmaFreeBuffer (
   IN  UINTN                        Pages,
   IN  VOID                         *HostAddress
   );


 #endif
	/** @file

	Abstractions for simple OMAP DMA. The DMA functions are modeled on
	the PCI IO protocol and follow the same rules as outlined in the UEFI specification.
	OMAP_DMA4 structure elements are described in the OMAP35xx TRM. Currently
	there is no PCI'less DMA protocol, if one existed it could be used to
	replace this library.

	Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>

	This program and the accompanying materials
	are licensed and made available under the terms and conditions of the BSD License
	which accompanies this distribution. The full text of the license may be found at
	http://opensource.org/licenses/bsd-license.php

	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

	**/

	#ifndef __OMAP_DMA_LIB_H__
	#define __OMAP_DMA_LIB_H__

	typedef enum {
	///
	/// A read operation from system memory by a bus master.
	///
	MapOperationBusMasterRead,
	///
	/// A write operation from system memory by a bus master.
	///
	MapOperationBusMasterWrite,
	///
	/// Provides both read and write access to system memory by both the processor and a
	/// bus master. The buffer is coherent from both the processor's and the bus master's point of view.
	///
	MapOperationBusMasterCommonBuffer,
	MapOperationMaximum
	} DMA_MAP_OPERATION;


	// Example from DMA chapter of the OMAP35xx spec
	typedef struct {
	UINT8 DataType; // DMA4_CSDPi[1:0]
	UINT8 ReadPortAccessType; // DMA4_CSDPi[8:7]
	UINT8 WritePortAccessType; // DMA4_CSDPi[15:14]
	UINT8 SourceEndiansim; // DMA4_CSDPi[21]
	UINT8 DestinationEndianism; // DMA4_CSDPi[19]
	UINT8 WriteMode; // DMA4_CSDPi[17:16]
	UINT8 SourcePacked; // DMA4_CSDPi[6]
	UINT8 DestinationPacked; // DMA4_CSDPi[13]
	UINT32 NumberOfElementPerFrame; // DMA4_CENi
	UINT32 NumberOfFramePerTransferBlock; // DMA4_CFNi
	UINT32 SourceStartAddress; // DMA4_CSSAi
	UINT32 DestinationStartAddress; // DMA4_CDSAi
	UINT32 SourceElementIndex; // DMA4_CSEi
	UINT32 SourceFrameIndex; // DMA4_CSFi
	UINT32 DestinationElementIndex; // DMA4_CDEi
	UINT32 DestinationFrameIndex; // DMA4_CDFi
	UINT8 ReadPortAccessMode; // DMA4_CCRi[13:12]
	UINT8 WritePortAccessMode; // DMA4_CCRi[15:14]
	UINT8 ReadPriority; // DMA4_CCRi[6]
	UINT8 WritePriority; // DMA4_CCRi[23]
	UINT8 ReadRequestNumber; // DMA4_CCRi[4:0]
	UINT8 WriteRequestNumber; // DMA4_CCRi[20:19]
	} OMAP_DMA4;


	/**
	Configure OMAP DMA Channel

	@param Channel DMA Channel to configure
	@param Dma4 Pointer to structure used to initialize DMA registers for the Channel

	@retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.
	@retval EFI_INVALID_PARAMETER Channel is not valid
	@retval EFI_DEVICE_ERROR The system hardware could not map the requested information.

	**/
	EFI_STATUS
	EFIAPI
	EnableDmaChannel (
	IN UINTN Channel,
	IN OMAP_DMA4 *Dma4
	);

	/**
	Turn of DMA channel configured by EnableDma().

	@param Channel DMA Channel to configure

	@retval EFI_SUCCESS DMA hardware disabled
	@retval EFI_INVALID_PARAMETER Channel is not valid
	@retval EFI_DEVICE_ERROR The system hardware could not map the requested information.

	**/
	EFI_STATUS
	EFIAPI
	DisableDmaChannel (
	IN UINTN Channel
	);


	/**
	Provides the DMA controller-specific addresses needed to access system memory.

	Operation is relative to the DMA bus master.

	@param Operation Indicates if the bus master is going to read or write to system memory.
	@param HostAddress The system memory address to map to the DMA controller.
	@param NumberOfBytes On input the number of bytes to map. On output the number of bytes
	that were mapped.
	@param DeviceAddress The resulting map address for the bus master controller to use to
	access the hosts HostAddress.
	@param Mapping A resulting value to pass to Unmap().

	@retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.
	@retval EFI_UNSUPPORTED The HostAddress cannot be mapped as a common buffer.
	@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
	@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
	@retval EFI_DEVICE_ERROR The system hardware could not map the requested address.

	**/
	EFI_STATUS
	EFIAPI
	DmaMap (
	IN DMA_MAP_OPERATION Operation,
	IN VOID *HostAddress,
	IN OUT UINTN *NumberOfBytes,
	OUT PHYSICAL_ADDRESS *DeviceAddress,
	OUT VOID **Mapping
	);




	/**
	Completes the DmaMapBusMasterRead(), DmaMapBusMasterWrite(), or DmaMapBusMasterCommonBuffer()
	operation and releases any corresponding resources.

	@param Mapping The mapping value returned from DmaMap*().

	@retval EFI_SUCCESS The range was unmapped.
	@retval EFI_DEVICE_ERROR The data was not committed to the target system memory.

	**/
	EFI_STATUS
	EFIAPI
	DmaUnmap (
	IN VOID *Mapping
	);


	/**
	Allocates pages that are suitable for an DmaMap() of type MapOperationBusMasterCommonBuffer.
	mapping.

	@param MemoryType The type of memory to allocate, EfiBootServicesData or
	EfiRuntimeServicesData.
	@param Pages The number of pages to allocate.
	@param HostAddress A pointer to store the base system memory address of the
	allocated range.

	@retval EFI_SUCCESS The requested memory pages were allocated.
	@retval EFI_UNSUPPORTED Attributes is unsupported. The only legal attribute bits are
	MEMORY_WRITE_COMBINE and MEMORY_CACHED.
	@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
	@retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.

	**/
	EFI_STATUS
	EFIAPI
	DmaAllocateBuffer (
	IN EFI_MEMORY_TYPE MemoryType,
	IN UINTN Pages,
	OUT VOID **HostAddress
	);


	/**
	Frees memory that was allocated with DmaAllocateBuffer().

	@param Pages The number of pages to free.
	@param HostAddress The base system memory address of the allocated range.

	@retval EFI_SUCCESS The requested memory pages were freed.
	@retval EFI_INVALID_PARAMETER The memory range specified by HostAddress and Pages
	was not allocated with DmaAllocateBuffer().

	**/
	EFI_STATUS
	EFIAPI
	DmaFreeBuffer (
	IN UINTN Pages,
	IN VOID *HostAddress
	);


	#endif