OvmfPkg/BlockMmioToBlockIoDxe/BlockIo.h

/** @file
  Definitions of functions for Driver Binding Protocol and Block I/O Protocol,
  and other internal definitions.

  Copyright (c) 2007 - 2010, Intel Corporation. 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 _EFI_BLOCK_MMIO_TO_BLOCK_IO_H_
#define _EFI_BLOCK_MMIO_TO_BLOCK_IO_H_

#include <Uefi.h>
#include <Protocol/BlockMmio.h>
#include <Protocol/ComponentName.h>
#include <Protocol/ComponentName2.h>
#include <Protocol/CpuIo2.h>
#include <Protocol/DevicePath.h>
#include <Protocol/DriverBinding.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>

#define  BLOCK_MMIO_TO_BLOCK_IO_SIGNATURE    SIGNATURE_32 ('B', 'M', 'I', 'O')

#define PRIVATE_FROM_BLOCK_IO(a) \
        CR (a, BLOCK_MMIO_TO_BLOCK_IO_DEVICE, BlockIo, BLOCK_MMIO_TO_BLOCK_IO_SIGNATURE)

extern EFI_COMPONENT_NAME_PROTOCOL   gBlockMmioToBlockIoComponentName;
extern EFI_COMPONENT_NAME2_PROTOCOL  gBlockMmioToBlockIoComponentName2;

typedef struct {
  UINT32                    Signature;
  EFI_HANDLE                Controller;
  BLOCK_MMIO_PROTOCOL       *BlockMmio;
  EFI_CPU_IO2_PROTOCOL      *CpuIo;
  EFI_DEVICE_PATH_PROTOCOL  *DevicePath;
  EFI_BLOCK_IO_PROTOCOL     BlockIo;
} BLOCK_MMIO_TO_BLOCK_IO_DEVICE;

//
// Functions for Driver Binding Protocol
//

/**
  Check whether the controller is a supported.

  @param  This                   The driver binding protocol.
  @param  Controller             The controller handle to check.
  @param  RemainingDevicePath    The remaining device path.

  @retval EFI_SUCCESS            The driver supports this controller.
  @retval other                  This device isn't supported.

**/
EFI_STATUS
EFIAPI
BlockIoDriverBindingSupported (
  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
  IN EFI_HANDLE                   Controller,
  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath
  );

/**
  Starts the BlockIo device with this driver.

  This function consumes Block MMIO Portocol and
  installs Block I/O Protocol.

  @param  This                  The driver binding protocol.
  @param  Controller            The Block MMIO device to start on
  @param  RemainingDevicePath   The remaining device path.

  @retval EFI_SUCCESS           This driver supports this device.
  @retval EFI_UNSUPPORTED       This driver does not support this device.
  @retval EFI_DEVICE_ERROR      This driver cannot be started due to device Error.
  @retval EFI_OUT_OF_RESOURCES  Can't allocate memory resources.
  @retval EFI_ALREADY_STARTED   This driver has been started.

**/
EFI_STATUS
EFIAPI
BlockIoDriverBindingStart (
  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
  IN EFI_HANDLE                   Controller,
  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath
  );

/**
  Stop controlling the device.

  @param  This                   The driver binding
  @param  Controller             The device controller controlled by the driver.
  @param  NumberOfChildren       The number of children of this device
  @param  ChildHandleBuffer      The buffer of children handle.

  @retval EFI_SUCCESS            The driver stopped from controlling the device.
  @retval EFI_DEVICE_ERROR       The device could not be stopped due to a device error.
  @retval EFI_UNSUPPORTED        Block I/O Protocol is not installed on Controller.
  @retval Others                 Failed to stop the driver

**/
EFI_STATUS
EFIAPI
BlockIoDriverBindingStop (
  IN  EFI_DRIVER_BINDING_PROTOCOL *This,
  IN  EFI_HANDLE                  Controller,
  IN  UINTN                       NumberOfChildren,
  IN  EFI_HANDLE                  *ChildHandleBuffer
  );

//
// Functions for Block I/O Protocol
//

/**
  Reset the block device.

  This function implements EFI_BLOCK_IO_PROTOCOL.Reset(). 
  It resets the block device hardware.
  ExtendedVerification is ignored in this implementation.

  @param  This                   Indicates a pointer to the calling context.
  @param  ExtendedVerification   Indicates that the driver may perform a more exhaustive
                                 verification operation of the device during reset.

  @retval EFI_SUCCESS            The block device was reset.
  @retval EFI_DEVICE_ERROR       The block device is not functioning correctly and could not be reset.

**/
EFI_STATUS
EFIAPI
BlockIoReset (
  IN EFI_BLOCK_IO_PROTOCOL    *This,
  IN BOOLEAN                  ExtendedVerification
  );

/**
  Reads the requested number of blocks from the device.

  This function implements EFI_BLOCK_IO_PROTOCOL.ReadBlocks(). 
  It reads the requested number of blocks from the device.
  All the blocks are read, or an error is returned.

  @param  This                   Indicates a pointer to the calling context.
  @param  MediaId                The media ID that the read request is for.
  @param  Lba                    The starting logical block address to read from on the device.
  @param  BufferSize             The size of the Buffer in bytes.
                                 This must be a multiple of the intrinsic block size of the device.
  @param  Buffer                 A pointer to the destination buffer for the data. The caller is
                                 responsible for either having implicit or explicit ownership of the buffer.

  @retval EFI_SUCCESS            The data was read correctly from the device.
  @retval EFI_DEVICE_ERROR       The device reported an error while attempting to perform the read operation.
  @retval EFI_NO_MEDIA           There is no media in the device.
  @retval EFI_MEDIA_CHANGED      The MediaId is not for the current media.
  @retval EFI_BAD_BUFFER_SIZE    The BufferSize parameter is not a multiple of the intrinsic block size of the device.
  @retval EFI_INVALID_PARAMETER  The read request contains LBAs that are not valid,
                                 or the buffer is not on proper alignment.

**/
EFI_STATUS
EFIAPI
BlockIoReadBlocks (
  IN EFI_BLOCK_IO_PROTOCOL    *This,
  IN UINT32                   MediaId,
  IN EFI_LBA                  Lba,
  IN UINTN                    BufferSize,
  OUT VOID                    *Buffer
  );

/**
  Writes a specified number of blocks to the device.

  This function implements EFI_BLOCK_IO_PROTOCOL.WriteBlocks(). 
  It writes a specified number of blocks to the device.
  All blocks are written, or an error is returned.

  @param  This                   Indicates a pointer to the calling context.
  @param  MediaId                The media ID that the write request is for.
  @param  Lba                    The starting logical block address to be written.
  @param  BufferSize             The size of the Buffer in bytes.
                                 This must be a multiple of the intrinsic block size of the device.
  @param  Buffer                 Pointer to the source buffer for the data.

  @retval EFI_SUCCESS            The data were written correctly to the device.
  @retval EFI_WRITE_PROTECTED    The device cannot be written to.
  @retval EFI_NO_MEDIA           There is no media in the device.
  @retval EFI_MEDIA_CHANGED      The MediaId is not for the current media.
  @retval EFI_DEVICE_ERROR       The device reported an error while attempting to perform the write operation.
  @retval EFI_BAD_BUFFER_SIZE    The BufferSize parameter is not a multiple of the intrinsic
                                 block size of the device.
  @retval EFI_INVALID_PARAMETER  The write request contains LBAs that are not valid,
                                 or the buffer is not on proper alignment.

**/
EFI_STATUS
EFIAPI
BlockIoWriteBlocks (
  IN EFI_BLOCK_IO_PROTOCOL    *This,
  IN UINT32                   MediaId,
  IN EFI_LBA                  Lba,
  IN UINTN                    BufferSize,
  IN VOID                     *Buffer
  );

/**
  Flushes all modified data to a physical block device.

  @param  This                   Indicates a pointer to the calling context.

  @retval EFI_SUCCESS            All outstanding data were written correctly to the device.
  @retval EFI_DEVICE_ERROR       The device reported an error while attempting to write data.
  @retval EFI_NO_MEDIA           There is no media in the device.

**/
EFI_STATUS
EFIAPI
BlockIoFlushBlocks (
  IN EFI_BLOCK_IO_PROTOCOL  *This
  );

//
// EFI Component Name Functions
//

/**
  Retrieves a Unicode string that is the user readable name of the driver.

  This function retrieves the user readable name of a driver in the form of a
  Unicode string. If the driver specified by This has a user readable name in
  the language specified by Language, then a pointer to the driver name is
  returned in DriverName, and EFI_SUCCESS is returned. If the driver specified
  by This does not support the language specified by Language,
  then EFI_UNSUPPORTED is returned.

  @param  This                  A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
                                EFI_COMPONENT_NAME_PROTOCOL instance.
  @param  Language              A pointer to a Null-terminated ASCII string
                                array indicating the language. This is the
                                language of the driver name that the caller is
                                requesting, and it must match one of the
                                languages specified in SupportedLanguages. The
                                number of languages supported by a driver is up
                                to the driver writer. Language is specified
                                in RFC 4646 or ISO 639-2 language code format.
  @param  DriverName            A pointer to the Unicode string to return.
                                This Unicode string is the name of the
                                driver specified by This in the language
                                specified by Language.

  @retval EFI_SUCCESS           The Unicode string for the Driver specified by
                                This and the language specified by Language was
                                returned in DriverName.
  @retval EFI_INVALID_PARAMETER Language is NULL.
  @retval EFI_INVALID_PARAMETER DriverName is NULL.
  @retval EFI_UNSUPPORTED       The driver specified by This does not support
                                the language specified by Language.

**/
EFI_STATUS
EFIAPI
BlockMmioToBlockIoGetDriverName (
  IN  EFI_COMPONENT_NAME_PROTOCOL  *This,
  IN  CHAR8                        *Language,
  OUT CHAR16                       **DriverName
  );


/**
  Retrieves a Unicode string that is the user readable name of the controller
  that is being managed by a driver.

  This function retrieves the user readable name of the controller specified by
  ControllerHandle and ChildHandle in the form of a Unicode string. If the
  driver specified by This has a user readable name in the language specified by
  Language, then a pointer to the controller name is returned in ControllerName,
  and EFI_SUCCESS is returned.  If the driver specified by This is not currently
  managing the controller specified by ControllerHandle and ChildHandle,
  then EFI_UNSUPPORTED is returned.  If the driver specified by This does not
  support the language specified by Language, then EFI_UNSUPPORTED is returned.

  @param  This                  A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
                                EFI_COMPONENT_NAME_PROTOCOL instance.
  @param  ControllerHandle      The handle of a controller that the driver
                                specified by This is managing.  This handle
                                specifies the controller whose name is to be
                                returned.
  @param  ChildHandle           The handle of the child controller to retrieve
                                the name of.  This is an optional parameter that
                                may be NULL.  It will be NULL for device
                                drivers.  It will also be NULL for a bus drivers
                                that wish to retrieve the name of the bus
                                controller.  It will not be NULL for a bus
                                driver that wishes to retrieve the name of a
                                child controller.
  @param  Language              A pointer to a Null-terminated ASCII string
                                array indicating the language.  This is the
                                language of the driver name that the caller is
                                requesting, and it must match one of the
                                languages specified in SupportedLanguages. The
                                number of languages supported by a driver is up
                                to the driver writer. Language is specified in
                                RFC 4646 or ISO 639-2 language code format.
  @param  ControllerName        A pointer to the Unicode string to return.
                                This Unicode string is the name of the
                                controller specified by ControllerHandle and
                                ChildHandle in the language specified by
                                Language from the point of view of the driver
                                specified by This.

  @retval EFI_SUCCESS           The Unicode string for the user readable name in
                                the language specified by Language for the
                                driver specified by This was returned in
                                DriverName.
  @retval EFI_INVALID_PARAMETER ControllerHandle is not a valid EFI_HANDLE.
  @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid
                                EFI_HANDLE.
  @retval EFI_INVALID_PARAMETER Language is NULL.
  @retval EFI_INVALID_PARAMETER ControllerName is NULL.
  @retval EFI_UNSUPPORTED       The driver specified by This is not currently
                                managing the controller specified by
                                ControllerHandle and ChildHandle.
  @retval EFI_UNSUPPORTED       The driver specified by This does not support
                                the language specified by Language.

**/
EFI_STATUS
EFIAPI
BlockMmioToBlockIoGetControllerName (
  IN  EFI_COMPONENT_NAME_PROTOCOL                     *This,
  IN  EFI_HANDLE                                      ControllerHandle,
  IN  EFI_HANDLE                                      ChildHandle        OPTIONAL,
  IN  CHAR8                                           *Language,
  OUT CHAR16                                          **ControllerName
  );

#endif