diff options
Diffstat (limited to 'EmulatorPkg/EmuBlockIoDxe/EmuBlockIo.c')
| -rw-r--r-- | EmulatorPkg/EmuBlockIoDxe/EmuBlockIo.c | 747 |
1 files changed, 747 insertions, 0 deletions
diff --git a/EmulatorPkg/EmuBlockIoDxe/EmuBlockIo.c b/EmulatorPkg/EmuBlockIoDxe/EmuBlockIo.c new file mode 100644 index 0000000000..b679d8f72a --- /dev/null +++ b/EmulatorPkg/EmuBlockIoDxe/EmuBlockIo.c @@ -0,0 +1,747 @@ +/**@file
+
+Copyright (c) 2004 - 2009, 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.
+bbe
+**/
+
+#include "EmuBlockIo.h"
+
+
+/**
+ Reset the block device hardware.
+
+ @param[in] This Indicates a pointer to the calling context.
+ @param[in] ExtendedVerification Indicates that the driver may perform a more
+ exhausive verfication operation of the device
+ during reset.
+
+ @retval EFI_SUCCESS The device was reset.
+ @retval EFI_DEVICE_ERROR The device is not functioning properly and could
+ not be reset.
+
+**/
+EFI_STATUS
+EFIAPI
+EmuBlockIo2Reset (
+ IN EFI_BLOCK_IO2_PROTOCOL *This,
+ IN BOOLEAN ExtendedVerification
+ )
+{
+ EFI_STATUS Status;
+ EMU_BLOCK_IO_PRIVATE *Private;
+ EFI_TPL OldTpl;
+
+ Private = EMU_BLOCK_IO2_PRIVATE_DATA_FROM_THIS (This);
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ Status = Private->Io->Reset (Private->Io, ExtendedVerification);
+
+ gBS->RestoreTPL (OldTpl);
+ return Status;
+}
+
+/**
+ Read BufferSize bytes from Lba into Buffer.
+
+ This function reads the requested number of blocks from the device. All the
+ blocks are read, or an error is returned.
+ If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_or EFI_MEDIA_CHANGED is returned and
+ non-blocking I/O is being used, the Event associated with this request will
+ not be signaled.
+
+ @param[in] This Indicates a pointer to the calling context.
+ @param[in] MediaId Id of the media, changes every time the media is
+ replaced.
+ @param[in] Lba The starting Logical Block Address to read from.
+ @param[in, out] Token A pointer to the token associated with the transaction.
+ @param[in] BufferSize Size of Buffer, must be a multiple of device block size.
+ @param[out] 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 read request was queued if Token->Event is
+ not NULL.The data was read correctly from the
+ device if the Token->Event is NULL.
+ @retval EFI_DEVICE_ERROR The device reported an error while performing
+ the read.
+ @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.
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack
+ of resources.
+**/
+EFI_STATUS
+EFIAPI
+EmuBlockIo2ReadBlocksEx (
+ IN EFI_BLOCK_IO2_PROTOCOL *This,
+ IN UINT32 MediaId,
+ IN EFI_LBA LBA,
+ IN OUT EFI_BLOCK_IO2_TOKEN *Token,
+ IN UINTN BufferSize,
+ OUT VOID *Buffer
+ )
+{
+ EFI_STATUS Status;
+ EMU_BLOCK_IO_PRIVATE *Private;
+ EFI_TPL OldTpl;
+
+ Private = EMU_BLOCK_IO2_PRIVATE_DATA_FROM_THIS (This);
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ Status = Private->Io->ReadBlocks (Private->Io, MediaId, LBA, Token, BufferSize, Buffer);
+
+ gBS->RestoreTPL (OldTpl);
+ return Status;
+}
+
+
+/**
+ Write BufferSize bytes from Lba into Buffer.
+
+ This function writes the requested number of blocks to the device. All blocks
+ are written, or an error is returned.If EFI_DEVICE_ERROR, EFI_NO_MEDIA,
+ EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED is returned and non-blocking I/O is
+ being used, the Event associated with this request will not be signaled.
+
+ @param[in] This Indicates a pointer to the calling context.
+ @param[in] MediaId The media ID that the write request is for.
+ @param[in] Lba The starting logical block address to be written. The
+ caller is responsible for writing to only legitimate
+ locations.
+ @param[in, out] Token A pointer to the token associated with the transaction.
+ @param[in] BufferSize Size of Buffer, must be a multiple of device block size.
+ @param[in] Buffer A pointer to the source buffer for the data.
+
+ @retval EFI_SUCCESS The write request was queued if Event is not NULL.
+ The data was written correctly to the device if
+ the Event is NULL.
+ @retval EFI_WRITE_PROTECTED The device can not be written to.
+ @retval EFI_NO_MEDIA There is no media in the device.
+ @retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.
+ @retval EFI_DEVICE_ERROR The device reported an error while performing the write.
+ @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the 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.
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack
+ of resources.
+
+**/
+EFI_STATUS
+EFIAPI
+EmuBlockIo2WriteBlocksEx (
+ IN EFI_BLOCK_IO2_PROTOCOL *This,
+ IN UINT32 MediaId,
+ IN EFI_LBA LBA,
+ IN OUT EFI_BLOCK_IO2_TOKEN *Token,
+ IN UINTN BufferSize,
+ IN VOID *Buffer
+ )
+{
+ EFI_STATUS Status;
+ EMU_BLOCK_IO_PRIVATE *Private;
+ EFI_TPL OldTpl;
+
+ Private = EMU_BLOCK_IO2_PRIVATE_DATA_FROM_THIS (This);
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ Status = Private->Io->WriteBlocks (Private->Io, MediaId, LBA, Token, BufferSize, Buffer);
+
+ gBS->RestoreTPL (OldTpl);
+ return Status;
+}
+
+
+
+/**
+ Flush the Block Device.
+
+ If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED
+ is returned and non-blocking I/O is being used, the Event associated with
+ this request will not be signaled.
+
+ @param[in] This Indicates a pointer to the calling context.
+ @param[in,out] Token A pointer to the token associated with the transaction
+
+ @retval EFI_SUCCESS The flush request was queued if Event is not NULL.
+ All outstanding data was written correctly to the
+ device if the Event is NULL.
+ @retval EFI_DEVICE_ERROR The device reported an error while writting back
+ the data.
+ @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_OUT_OF_RESOURCES The request could not be completed due to a lack
+ of resources.
+
+**/
+EFI_STATUS
+EFIAPI
+EmuBlockIo2Flush (
+ IN EFI_BLOCK_IO2_PROTOCOL *This,
+ IN OUT EFI_BLOCK_IO2_TOKEN *Token
+ )
+{
+ EFI_STATUS Status;
+ EMU_BLOCK_IO_PRIVATE *Private;
+ EFI_TPL OldTpl;
+
+ Private = EMU_BLOCK_IO2_PRIVATE_DATA_FROM_THIS (This);
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ Status = Private->Io->FlushBlocks (Private->Io, Token);
+
+ gBS->RestoreTPL (OldTpl);
+ return Status;
+}
+
+
+
+/**
+ Reset the Block Device.
+
+ @param This Indicates a pointer to the calling context.
+ @param ExtendedVerification Driver may perform diagnostics on reset.
+
+ @retval EFI_SUCCESS The device was reset.
+ @retval EFI_DEVICE_ERROR The device is not functioning properly and could
+ not be reset.
+
+**/
+EFI_STATUS
+EFIAPI
+EmuBlockIoReset (
+ IN EFI_BLOCK_IO_PROTOCOL *This,
+ IN BOOLEAN ExtendedVerification
+ )
+{
+ EFI_STATUS Status;
+ EMU_BLOCK_IO_PRIVATE *Private;
+ EFI_TPL OldTpl;
+
+ Private = EMU_BLOCK_IO_PRIVATE_DATA_FROM_THIS (This);
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ Status = Private->Io->Reset (Private->Io, ExtendedVerification);
+
+ gBS->RestoreTPL (OldTpl);
+ return Status;
+}
+
+
+/**
+ Read BufferSize bytes from Lba into Buffer.
+
+ @param This Indicates a pointer to the calling context.
+ @param MediaId Id of the media, changes every time the media is replaced.
+ @param Lba The starting Logical Block Address to read from
+ @param BufferSize Size of Buffer, must be a multiple of device block size.
+ @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 performing the read.
+ @retval EFI_NO_MEDIA There is no media in the device.
+ @retval EFI_MEDIA_CHANGED The MediaId does not matched the current device.
+ @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the 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
+EmuBlockIoReadBlocks (
+ IN EFI_BLOCK_IO_PROTOCOL *This,
+ IN UINT32 MediaId,
+ IN EFI_LBA Lba,
+ IN UINTN BufferSize,
+ OUT VOID *Buffer
+ )
+{
+ EFI_STATUS Status;
+ EMU_BLOCK_IO_PRIVATE *Private;
+ EFI_TPL OldTpl;
+ EFI_BLOCK_IO2_TOKEN Token;
+
+ Private = EMU_BLOCK_IO_PRIVATE_DATA_FROM_THIS (This);
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ Token.Event = NULL;
+ Status = Private->Io->ReadBlocks (Private->Io, MediaId, Lba, &Token, BufferSize, Buffer);
+
+ gBS->RestoreTPL (OldTpl);
+ return Status;
+}
+
+
+/**
+ Write BufferSize bytes from Lba into Buffer.
+
+ @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. The caller is
+ responsible for writing to only legitimate locations.
+ @param BufferSize Size of Buffer, must be a multiple of device block size.
+ @param Buffer A pointer to the source buffer for the data.
+
+ @retval EFI_SUCCESS The data was written correctly to the device.
+ @retval EFI_WRITE_PROTECTED The device can not be written to.
+ @retval EFI_DEVICE_ERROR The device reported an error while performing the write.
+ @retval EFI_NO_MEDIA There is no media in the device.
+ @retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.
+ @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the 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
+EmuBlockIoWriteBlocks (
+ IN EFI_BLOCK_IO_PROTOCOL *This,
+ IN UINT32 MediaId,
+ IN EFI_LBA Lba,
+ IN UINTN BufferSize,
+ IN VOID *Buffer
+ )
+{
+ EFI_STATUS Status;
+ EMU_BLOCK_IO_PRIVATE *Private;
+ EFI_TPL OldTpl;
+ EFI_BLOCK_IO2_TOKEN Token;
+
+ Private = EMU_BLOCK_IO_PRIVATE_DATA_FROM_THIS (This);
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ Token.Event = NULL;
+ Status = Private->Io->WriteBlocks (Private->Io, MediaId, Lba, &Token, BufferSize, Buffer);
+
+ gBS->RestoreTPL (OldTpl);
+ return Status;
+}
+
+/**
+ Flush the Block Device.
+
+ @param This Indicates a pointer to the calling context.
+
+ @retval EFI_SUCCESS All outstanding data was written to the device
+ @retval EFI_DEVICE_ERROR The device reported an error while writting back the data
+ @retval EFI_NO_MEDIA There is no media in the device.
+
+**/
+EFI_STATUS
+EFIAPI
+EmuBlockIoFlushBlocks (
+ IN EFI_BLOCK_IO_PROTOCOL *This
+ )
+{
+ EFI_STATUS Status;
+ EMU_BLOCK_IO_PRIVATE *Private;
+ EFI_TPL OldTpl;
+ EFI_BLOCK_IO2_TOKEN Token;
+
+ Private = EMU_BLOCK_IO_PRIVATE_DATA_FROM_THIS (This);
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ Token.Event = NULL;
+ Status = Private->Io->FlushBlocks (Private->Io, &Token);
+
+ gBS->RestoreTPL (OldTpl);
+ return Status;
+}
+
+
+
+/**
+ Tests to see if this driver supports a given controller. If a child device is provided,
+ it further tests to see if this driver supports creating a handle for the specified child device.
+
+ This function checks to see if the driver specified by This supports the device specified by
+ ControllerHandle. Drivers will typically use the device path attached to
+ ControllerHandle and/or the services from the bus I/O abstraction attached to
+ ControllerHandle to determine if the driver supports ControllerHandle. This function
+ may be called many times during platform initialization. In order to reduce boot times, the tests
+ performed by this function must be very small, and take as little time as possible to execute. This
+ function must not change the state of any hardware devices, and this function must be aware that the
+ device specified by ControllerHandle may already be managed by the same driver or a
+ different driver. This function must match its calls to AllocatePages() with FreePages(),
+ AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().
+ Because ControllerHandle may have been previously started by the same driver, if a protocol is
+ already in the opened state, then it must not be closed with CloseProtocol(). This is required
+ to guarantee the state of ControllerHandle is not modified by this function.
+
+ @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+ @param[in] ControllerHandle The handle of the controller to test. This handle
+ must support a protocol interface that supplies
+ an I/O abstraction to the driver.
+ @param[in] RemainingDevicePath A pointer to the remaining portion of a device path. This
+ parameter is ignored by device drivers, and is optional for bus
+ drivers. For bus drivers, if this parameter is not NULL, then
+ the bus driver must determine if the bus controller specified
+ by ControllerHandle and the child controller specified
+ by RemainingDevicePath are both supported by this
+ bus driver.
+
+ @retval EFI_SUCCESS The device specified by ControllerHandle and
+ RemainingDevicePath is supported by the driver specified by This.
+ @retval EFI_ALREADY_STARTED The device specified by ControllerHandle and
+ RemainingDevicePath is already being managed by the driver
+ specified by This.
+ @retval EFI_ACCESS_DENIED The device specified by ControllerHandle and
+ RemainingDevicePath is already being managed by a different
+ driver or an application that requires exclusive access.
+ Currently not implemented.
+ @retval EFI_UNSUPPORTED The device specified by ControllerHandle and
+ RemainingDevicePath is not supported by the driver specified by This.
+**/
+EFI_STATUS
+EFIAPI
+EmuBlockIoDriverBindingSupported (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE Handle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
+ )
+{
+ EFI_STATUS Status;
+ EMU_IO_THUNK_PROTOCOL *EmuIoThunk;
+
+ //
+ // Open the IO Abstraction(s) needed to perform the supported test
+ //
+ Status = gBS->OpenProtocol (
+ Handle,
+ &gEmuIoThunkProtocolGuid,
+ (VOID **)&EmuIoThunk,
+ This->DriverBindingHandle,
+ Handle,
+ EFI_OPEN_PROTOCOL_BY_DRIVER
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Make sure GUID is for a File System handle.
+ //
+ Status = EFI_UNSUPPORTED;
+ if (CompareGuid (EmuIoThunk->Protocol, &gEmuBlockIoProtocolGuid)) {
+ Status = EFI_SUCCESS;
+ }
+
+ //
+ // Close the I/O Abstraction(s) used to perform the supported test
+ //
+ gBS->CloseProtocol (
+ Handle,
+ &gEmuIoThunkProtocolGuid,
+ This->DriverBindingHandle,
+ Handle
+ );
+ return Status;
+}
+
+
+/**
+ Starts a device controller or a bus controller.
+
+ The Start() function is designed to be invoked from the EFI boot service ConnectController().
+ As a result, much of the error checking on the parameters to Start() has been moved into this
+ common boot service. It is legal to call Start() from other locations,
+ but the following calling restrictions must be followed, or the system behavior will not be deterministic.
+ 1. ControllerHandle must be a valid EFI_HANDLE.
+ 2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned
+ EFI_DEVICE_PATH_PROTOCOL.
+ 3. Prior to calling Start(), the Supported() function for the driver specified by This must
+ have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS.
+
+ @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+ @param[in] ControllerHandle The handle of the controller to start. This handle
+ must support a protocol interface that supplies
+ an I/O abstraction to the driver.
+ @param[in] RemainingDevicePath A pointer to the remaining portion of a device path. This
+ parameter is ignored by device drivers, and is optional for bus
+ drivers. For a bus driver, if this parameter is NULL, then handles
+ for all the children of Controller are created by this driver.
+ If this parameter is not NULL and the first Device Path Node is
+ not the End of Device Path Node, then only the handle for the
+ child device specified by the first Device Path Node of
+ RemainingDevicePath is created by this driver.
+ If the first Device Path Node of RemainingDevicePath is
+ the End of Device Path Node, no child handle is created by this
+ driver.
+
+ @retval EFI_SUCCESS The device was started.
+ @retval EFI_DEVICE_ERROR The device could not be started due to a device error.Currently not implemented.
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
+ @retval Others The driver failded to start the device.
+
+**/
+EFI_STATUS
+EFIAPI
+EmuBlockIoDriverBindingStart (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE Handle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
+ )
+{
+ EFI_STATUS Status;
+ EMU_IO_THUNK_PROTOCOL *EmuIoThunk;
+ EMU_BLOCK_IO_PRIVATE *Private = NULL;
+
+ //
+ // Grab the protocols we need
+ //
+
+ Status = gBS->OpenProtocol (
+ Handle,
+ &gEmuIoThunkProtocolGuid,
+ (void *)&EmuIoThunk,
+ This->DriverBindingHandle,
+ Handle,
+ EFI_OPEN_PROTOCOL_BY_DRIVER
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ if (!CompareGuid (EmuIoThunk->Protocol, &gEmuBlockIoProtocolGuid)) {
+ Status = EFI_UNSUPPORTED;
+ goto Done;
+ }
+
+ Status = EmuIoThunk->Open (EmuIoThunk);
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ Private = AllocatePool (sizeof (EMU_BLOCK_IO_PRIVATE));
+ if (Private == NULL) {
+ goto Done;
+ }
+
+ Private->Signature = EMU_BLOCK_IO_PRIVATE_SIGNATURE;
+ Private->IoThunk = EmuIoThunk;
+ Private->Io = EmuIoThunk->Interface;
+ Private->EfiHandle = Handle;
+
+ Private->BlockIo.Revision = EFI_BLOCK_IO_PROTOCOL_REVISION2;
+ Private->BlockIo.Media = &Private->Media;
+ Private->BlockIo.Reset = EmuBlockIoReset;
+ Private->BlockIo.ReadBlocks = EmuBlockIoReadBlocks;
+ Private->BlockIo.WriteBlocks = EmuBlockIoWriteBlocks;
+ Private->BlockIo.FlushBlocks = EmuBlockIoFlushBlocks;
+
+ Private->BlockIo2.Media = &Private->Media;
+ Private->BlockIo2.Reset = EmuBlockIo2Reset;
+ Private->BlockIo2.ReadBlocksEx = EmuBlockIo2ReadBlocksEx;
+ Private->BlockIo2.WriteBlocksEx = EmuBlockIo2WriteBlocksEx;
+ Private->BlockIo2.FlushBlocksEx = EmuBlockIo2Flush;
+
+ Private->ControllerNameTable = NULL;
+
+ Status = Private->Io->CreateMapping (Private->Io, &Private->Media);
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ AddUnicodeString2 (
+ "eng",
+ gEmuBlockIoComponentName.SupportedLanguages,
+ &Private->ControllerNameTable,
+ EmuIoThunk->ConfigString,
+ TRUE
+ );
+
+ AddUnicodeString2 (
+ "en",
+ gEmuBlockIoComponentName2.SupportedLanguages,
+ &Private->ControllerNameTable,
+ EmuIoThunk->ConfigString,
+ FALSE
+ );
+
+ Status = gBS->InstallMultipleProtocolInterfaces (
+ &Handle,
+ &gEfiBlockIoProtocolGuid, &Private->BlockIo,
+ &gEfiBlockIo2ProtocolGuid, &Private->BlockIo2,
+ NULL
+ );
+
+Done:
+ if (EFI_ERROR (Status)) {
+ if (Private != NULL) {
+ if (Private->ControllerNameTable != NULL) {
+ FreeUnicodeStringTable (Private->ControllerNameTable);
+ }
+
+ gBS->FreePool (Private);
+
+ }
+
+ gBS->CloseProtocol (
+ Handle,
+ &gEmuIoThunkProtocolGuid,
+ This->DriverBindingHandle,
+ Handle
+ );
+ }
+
+ return Status;
+}
+
+
+/**
+ Stops a device controller or a bus controller.
+
+ The Stop() function is designed to be invoked from the EFI boot service DisconnectController().
+ As a result, much of the error checking on the parameters to Stop() has been moved
+ into this common boot service. It is legal to call Stop() from other locations,
+ but the following calling restrictions must be followed, or the system behavior will not be deterministic.
+ 1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this
+ same driver's Start() function.
+ 2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid
+ EFI_HANDLE. In addition, all of these handles must have been created in this driver's
+ Start() function, and the Start() function must have called OpenProtocol() on
+ ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
+
+ @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+ @param[in] ControllerHandle A handle to the device being stopped. The handle must
+ support a bus specific I/O protocol for the driver
+ to use to stop the device.
+ @param[in] NumberOfChildren The number of child device handles in ChildHandleBuffer.
+ @param[in] ChildHandleBuffer An array of child handles to be freed. May be NULL
+ if NumberOfChildren is 0.
+
+ @retval EFI_SUCCESS The device was stopped.
+ @retval EFI_DEVICE_ERROR The device could not be stopped due to a device error.
+
+**/
+EFI_STATUS
+EFIAPI
+EmuBlockIoDriverBindingStop (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE Handle,
+ IN UINTN NumberOfChildren,
+ IN EFI_HANDLE *ChildHandleBuffer
+ )
+{
+ EFI_BLOCK_IO_PROTOCOL *BlockIo;
+ EFI_STATUS Status;
+ EMU_BLOCK_IO_PRIVATE *Private;
+
+ //
+ // Get our context back
+ //
+ Status = gBS->OpenProtocol (
+ Handle,
+ &gEfiBlockIoProtocolGuid,
+ (void *)&BlockIo,
+ This->DriverBindingHandle,
+ Handle,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL
+ );
+ if (EFI_ERROR (Status)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ Private = EMU_BLOCK_IO_PRIVATE_DATA_FROM_THIS (BlockIo);
+ Status = Private->IoThunk->Close (Private->IoThunk);
+
+ Status = gBS->UninstallMultipleProtocolInterfaces (
+ Private->EfiHandle,
+ &gEfiBlockIoProtocolGuid, &Private->BlockIo,
+ &gEfiBlockIo2ProtocolGuid, &Private->BlockIo2,
+ NULL
+ );
+ if (!EFI_ERROR (Status)) {
+ Status = gBS->CloseProtocol (
+ Handle,
+ &gEmuIoThunkProtocolGuid,
+ This->DriverBindingHandle,
+ Handle
+ );
+ }
+
+ if (!EFI_ERROR (Status)) {
+ //
+ // Free our instance data
+ //
+ FreeUnicodeStringTable (Private->ControllerNameTable);
+ gBS->FreePool (Private);
+ }
+
+ return Status;
+}
+
+
+
+
+
+EFI_DRIVER_BINDING_PROTOCOL gEmuBlockIoDriverBinding = {
+ EmuBlockIoDriverBindingSupported,
+ EmuBlockIoDriverBindingStart,
+ EmuBlockIoDriverBindingStop,
+ 0xa,
+ NULL,
+ NULL
+};
+
+
+
+
+/**
+ The user Entry Point for module EmuBlockIo . The user code starts with this function.
+
+ @param[in] ImageHandle The firmware allocated handle for the EFI image.
+ @param[in] SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The entry point is executed successfully.
+ @retval other Some error occurs when executing this entry point.
+
+**/
+EFI_STATUS
+EFIAPI
+InitializeEmuBlockIo (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+
+ Status = EfiLibInstallAllDriverProtocols2 (
+ ImageHandle,
+ SystemTable,
+ &gEmuBlockIoDriverBinding,
+ ImageHandle,
+ &gEmuBlockIoComponentName,
+ &gEmuBlockIoComponentName2,
+ NULL,
+ NULL,
+ &gEmuBlockIoDriverDiagnostics,
+ &gEmuBlockIoDriverDiagnostics2
+ );
+ ASSERT_EFI_ERROR (Status);
+
+
+ return Status;
+}
+
+
+
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