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authorlgao4 <lgao4@6f19259b-4bc3-4df7-8a09-765794883524>2006-06-02 09:42:14 +0000
committerlgao4 <lgao4@6f19259b-4bc3-4df7-8a09-765794883524>2006-06-02 09:42:14 +0000
commitb83a12376d0d1ffd5f106475e77146ec07598b79 (patch)
treeb8a91f307802bc2a0929f034c658ba736e43dde2 /EdkModulePkg/Universal/Disk
parent717841f1d62d4ca9457ccb69873029e24cdf28c9 (diff)
downloadedk2-platforms-b83a12376d0d1ffd5f106475e77146ec07598b79.tar.xz
Remove Debug message and early test code in DiskIo
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@396 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'EdkModulePkg/Universal/Disk')
-rw-r--r--EdkModulePkg/Universal/Disk/DiskIo/Dxe/diskio.c1657
1 files changed, 781 insertions, 876 deletions
diff --git a/EdkModulePkg/Universal/Disk/DiskIo/Dxe/diskio.c b/EdkModulePkg/Universal/Disk/DiskIo/Dxe/diskio.c
index 4998c9b0f7..35d2a19be2 100644
--- a/EdkModulePkg/Universal/Disk/DiskIo/Dxe/diskio.c
+++ b/EdkModulePkg/Universal/Disk/DiskIo/Dxe/diskio.c
@@ -1,876 +1,781 @@
-/*++
-
-Copyright (c) 2006, Intel Corporation
-All rights reserved. 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.
-
-Module Name:
-
- DiskIo.c
-
-Abstract:
-
- DiskIo driver that layers it's self on every Block IO protocol in the system.
- DiskIo converts a block oriented device to a byte oriented device.
-
- ReadDisk may have to do reads that are not aligned on sector boundaries.
- There are three cases:
-
- UnderRun - The first byte is not on a sector boundary or the read request is
- less than a sector in length.
-
- Aligned - A read of N contiguous sectors.
-
- OverRun - The last byte is not on a sector boundary.
-
---*/
-
-#include "DiskIo.h"
-
-//
-// Prototypes
-// Driver model protocol interface
-//
-EFI_STATUS
-EFIAPI
-DiskIoDriverBindingSupported (
- IN EFI_DRIVER_BINDING_PROTOCOL *This,
- IN EFI_HANDLE ControllerHandle,
- IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
- );
-
-EFI_STATUS
-EFIAPI
-DiskIoDriverBindingStart (
- IN EFI_DRIVER_BINDING_PROTOCOL *This,
- IN EFI_HANDLE ControllerHandle,
- IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
- );
-
-EFI_STATUS
-EFIAPI
-DiskIoDriverBindingStop (
- IN EFI_DRIVER_BINDING_PROTOCOL *This,
- IN EFI_HANDLE ControllerHandle,
- IN UINTN NumberOfChildren,
- IN EFI_HANDLE *ChildHandleBuffer
- );
-
-//
-// Disk I/O Protocol Interface
-//
-EFI_STATUS
-EFIAPI
-DiskIoReadDisk (
- IN EFI_DISK_IO_PROTOCOL *This,
- IN UINT32 MediaId,
- IN UINT64 Offset,
- IN UINTN BufferSize,
- OUT VOID *Buffer
- );
-
-EFI_STATUS
-EFIAPI
-DiskIoWriteDisk (
- IN EFI_DISK_IO_PROTOCOL *This,
- IN UINT32 MediaId,
- IN UINT64 Offset,
- IN UINTN BufferSize,
- IN VOID *Buffer
- );
-
-EFI_DRIVER_BINDING_PROTOCOL gDiskIoDriverBinding = {
- DiskIoDriverBindingSupported,
- DiskIoDriverBindingStart,
- DiskIoDriverBindingStop,
- 0x10,
- NULL,
- NULL
-};
-
-DISK_IO_PRIVATE_DATA gDiskIoPrivateDataTemplate = {
- DISK_IO_PRIVATE_DATA_SIGNATURE,
- {
- EFI_DISK_IO_PROTOCOL_REVISION,
- DiskIoReadDisk,
- DiskIoWriteDisk
- },
- NULL
-};
-
-EFI_STATUS
-EFIAPI
-DiskIoDriverBindingSupported (
- IN EFI_DRIVER_BINDING_PROTOCOL *This,
- IN EFI_HANDLE ControllerHandle,
- IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
- )
-/*++
-
- Routine Description:
- Test to see if this driver supports ControllerHandle. Any ControllerHandle
- than contains a BlockIo protocol can be supported.
-
- Arguments:
- This - Protocol instance pointer.
- ControllerHandle - Handle of device to test.
- RemainingDevicePath - Not used.
-
- Returns:
- EFI_SUCCESS - This driver supports this device.
- EFI_ALREADY_STARTED - This driver is already running on this device.
- other - This driver does not support this device.
-
---*/
-{
- EFI_STATUS Status;
- EFI_BLOCK_IO_PROTOCOL *BlockIo;
-/*
- DEBUG_CODE_BEGIN
- UINT32 Bar;
- UINT32 Foo;
- UINT32 HotPlug;
-
- //
- // Get TYPE 0
- //
- Bar = PcdGet32 (PciExpressBaseVersion);
- DEBUG ((EFI_D_ERROR, "PciExpressBaseVersion = %08x\n", Bar));
-
- //
- // Get TYPE 1
- //
- Foo = PcdGet32 (PciExpressBaseAddress);
- DEBUG ((EFI_D_ERROR, "PciExpressBaseAddress = %08x\n", Foo));
-
- //
- // Set TYPE 1
- //
- PcdSet32 (PciExpressBaseAddress, Foo + 1);
-
- //
- // Get TYPE 1
- //
- Foo = PcdGet32 (PciExpressBaseAddress);
- DEBUG ((EFI_D_ERROR, "PciExpressBaseAddress = %08x\n", Foo));
-
- //
- // Get TYPE 2
- //
- HotPlug = PcdGet32 (PciExpressBaseHotPlug);
- DEBUG ((EFI_D_ERROR, "PciExpressHotPlug = %08x\n", HotPlug));
-
- //
- // Set TYPE 1
- //
- PcdSet32 (PciExpressBaseHotPlug, HotPlug + 1);
-
- //
- // Get TYPE 1
- //
- HotPlug = PcdGet32 (PciExpressBaseHotPlug);
- DEBUG ((EFI_D_ERROR, "PciExpressHotPlug = %08x\n", HotPlug));
-
- DEBUG_CODE_END
-
- DEBUG_CODE_BEGIN
- UINT32 MyVariable;
-
- if (ControllerHandle == NULL) {
- MyVariable = 32 * (UINTN)This;
- ControllerHandle = (EFI_HANDLE)MyVariable;
- DEBUG ((EFI_D_ERROR, "DiskIoSupported-DebugCode. MyVariable = %08x\n", MyVariable));
- ASSERT (MyVariable != 32);
- }
- DEBUG_CODE_END
-*/
- DEBUG ((EFI_D_ERROR, "DiskIoSupported\n"));
-
-// Io8Or (0x400, 1);
-// Io8And (0x400, 1);
-// Io8AndThenOr (0x400, 1, 2);
-
-// Mmio8Or (0xa0000000, 1);
-// Mmio8And (0xa0000000, 1);
-// Mmio8AndThenOr (0xa0000000, 1, 2);
-
-/*
- PciRead8 (PCI_LIB_ADDRESS (1,2,3,4));
- PciRead16 (PCI_LIB_ADDRESS (1,2,3,4));
- PciRead32 (PCI_LIB_ADDRESS (1,2,3,4));
-
- PciWrite8 (PCI_LIB_ADDRESS (1,2,3,4), 0xAA);
- PciWrite16 (PCI_LIB_ADDRESS (1,2,3,4), 0xAA55);
- PciWrite32 (PCI_LIB_ADDRESS (1,2,3,4), 0xAA55A55A);
-
- Pci8Or (PCI_LIB_ADDRESS (1,2,3,4), 0xAA);
- Pci8And (PCI_LIB_ADDRESS (1,2,3,4), 0x55);
- Pci8AndThenOr (PCI_LIB_ADDRESS (1,2,3,4), 0xAA, 0x55);
-
- Pci16Or (PCI_LIB_ADDRESS (1,2,3,4), 0xAA55);
- Pci16And (PCI_LIB_ADDRESS (1,2,3,4), 0x55AA);
- Pci16AndThenOr (PCI_LIB_ADDRESS (1,2,3,4), 0xAA55, 0x55AA);
-
- Pci32Or (PCI_LIB_ADDRESS (1,2,3,4), 0xAA55A55A);
- Pci32And (PCI_LIB_ADDRESS (1,2,3,4), 0x55AA5AA5);
- Pci32AndThenOr (PCI_LIB_ADDRESS (1,2,3,4), 0xAA555AA5, 0x55AAA55A);
-*/
- //
- // Open the IO Abstraction(s) needed to perform the supported test.
- //
- Status = gBS->OpenProtocol (
- ControllerHandle,
- &gEfiBlockIoProtocolGuid,
- (VOID **) &BlockIo,
- This->DriverBindingHandle,
- ControllerHandle,
- EFI_OPEN_PROTOCOL_BY_DRIVER
- );
- if (EFI_ERROR (Status)) {
- return Status;
- }
- //
- // Close the I/O Abstraction(s) used to perform the supported test.
- //
- gBS->CloseProtocol (
- ControllerHandle,
- &gEfiBlockIoProtocolGuid,
- This->DriverBindingHandle,
- ControllerHandle
- );
- return EFI_SUCCESS;
-}
-
-EFI_STATUS
-EFIAPI
-DiskIoDriverBindingStart (
- IN EFI_DRIVER_BINDING_PROTOCOL *This,
- IN EFI_HANDLE ControllerHandle,
- IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
- )
-/*++
-
- Routine Description:
- Start this driver on ControllerHandle by opening a Block IO protocol and
- installing a Disk IO protocol on ControllerHandle.
-
- Arguments:
- This - Protocol instance pointer.
- ControllerHandle - Handle of device to bind driver to.
- RemainingDevicePath - Not used, always produce all possible children.
-
- Returns:
- EFI_SUCCESS - This driver is added to ControllerHandle.
- EFI_ALREADY_STARTED - This driver is already running on ControllerHandle.
- other - This driver does not support this device.
-
---*/
-{
- EFI_STATUS Status;
- DISK_IO_PRIVATE_DATA *Private;
-
- Private = NULL;
-
- DEBUG ((EFI_D_ERROR, "DiskIoStart\n"));
- //
- // Connect to the Block IO interface on ControllerHandle.
- //
- Status = gBS->OpenProtocol (
- ControllerHandle,
- &gEfiBlockIoProtocolGuid,
- (VOID **) &gDiskIoPrivateDataTemplate.BlockIo,
- This->DriverBindingHandle,
- ControllerHandle,
- EFI_OPEN_PROTOCOL_BY_DRIVER
- );
- if (EFI_ERROR (Status)) {
- return Status;
- }
- //
- // Initialize the Disk IO device instance.
- //
- Private = AllocateCopyPool (sizeof (DISK_IO_PRIVATE_DATA), &gDiskIoPrivateDataTemplate);
- if (Private == NULL) {
- Status = EFI_OUT_OF_RESOURCES;
- goto ErrorExit;
- }
- //
- // Install protocol interfaces for the Disk IO device.
- //
- Status = gBS->InstallProtocolInterface (
- &ControllerHandle,
- &gEfiDiskIoProtocolGuid,
- EFI_NATIVE_INTERFACE,
- &Private->DiskIo
- );
-
-ErrorExit:
- if (EFI_ERROR (Status)) {
-
- if (Private != NULL) {
- gBS->FreePool (Private);
- }
-
- gBS->CloseProtocol (
- ControllerHandle,
- &gEfiBlockIoProtocolGuid,
- This->DriverBindingHandle,
- ControllerHandle
- );
- }
-
- return Status;
-}
-
-EFI_STATUS
-EFIAPI
-DiskIoDriverBindingStop (
- IN EFI_DRIVER_BINDING_PROTOCOL *This,
- IN EFI_HANDLE ControllerHandle,
- IN UINTN NumberOfChildren,
- IN EFI_HANDLE *ChildHandleBuffer
- )
-/*++
-
- Routine Description:
- Stop this driver on ControllerHandle by removing Disk IO protocol and closing
- the Block IO protocol on ControllerHandle.
-
- Arguments:
- This - Protocol instance pointer.
- ControllerHandle - Handle of device to stop driver on.
- NumberOfChildren - Not used.
- ChildHandleBuffer - Not used.
-
- Returns:
- EFI_SUCCESS - This driver is removed ControllerHandle.
- other - This driver was not removed from this device.
- EFI_UNSUPPORTED
-
---*/
-{
- EFI_STATUS Status;
- EFI_DISK_IO_PROTOCOL *DiskIo;
- DISK_IO_PRIVATE_DATA *Private;
-
- DEBUG ((EFI_D_ERROR, "DiskIoStop\n"));
- //
- // Get our context back.
- //
- Status = gBS->OpenProtocol (
- ControllerHandle,
- &gEfiDiskIoProtocolGuid,
- (VOID **) &DiskIo,
- This->DriverBindingHandle,
- ControllerHandle,
- EFI_OPEN_PROTOCOL_GET_PROTOCOL
- );
- if (EFI_ERROR (Status)) {
- return EFI_UNSUPPORTED;
- }
-
- Private = DISK_IO_PRIVATE_DATA_FROM_THIS (DiskIo);
-
- Status = gBS->UninstallProtocolInterface (
- ControllerHandle,
- &gEfiDiskIoProtocolGuid,
- &Private->DiskIo
- );
- if (!EFI_ERROR (Status)) {
-
- Status = gBS->CloseProtocol (
- ControllerHandle,
- &gEfiBlockIoProtocolGuid,
- This->DriverBindingHandle,
- ControllerHandle
- );
- }
-
- if (!EFI_ERROR (Status)) {
- gBS->FreePool (Private);
- }
-
- return Status;
-}
-
-EFI_STATUS
-EFIAPI
-DiskIoReadDisk (
- IN EFI_DISK_IO_PROTOCOL *This,
- IN UINT32 MediaId,
- IN UINT64 Offset,
- IN UINTN BufferSize,
- OUT VOID *Buffer
- )
-/*++
-
- Routine Description:
- Read BufferSize bytes from Offset into Buffer.
-
- Reads may support reads that are not aligned on
- sector boundaries. There are three cases:
-
- UnderRun - The first byte is not on a sector boundary or the read request is
- less than a sector in length.
-
- Aligned - A read of N contiguous sectors.
-
- OverRun - The last byte is not on a sector boundary.
-
-
- Arguments:
- This - Protocol instance pointer.
- MediaId - Id of the media, changes every time the media is replaced.
- Offset - The starting byte offset to read from.
- BufferSize - Size of Buffer.
- Buffer - Buffer containing read data.
-
- Returns:
- EFI_SUCCESS - The data was read correctly from the device.
- EFI_DEVICE_ERROR - The device reported an error while performing the read.
- EFI_NO_MEDIA - There is no media in the device.
- EFI_MEDIA_CHNAGED - The MediaId does not matched the current device.
- EFI_INVALID_PARAMETER - The read request contains device addresses that are not
- valid for the device.
- EFI_OUT_OF_RESOURCES
-
---*/
-{
- EFI_STATUS Status;
- DISK_IO_PRIVATE_DATA *Private;
- EFI_BLOCK_IO_PROTOCOL *BlockIo;
- EFI_BLOCK_IO_MEDIA *Media;
- UINT32 BlockSize;
- UINT64 Lba;
- UINT64 OverRunLba;
- UINT32 UnderRun;
- UINT32 OverRun;
- BOOLEAN TransactionComplete;
- UINTN WorkingBufferSize;
- UINT8 *WorkingBuffer;
- UINTN Length;
- UINT8 *Data;
- UINT8 *PreData;
- UINTN IsBufferAligned;
- UINTN DataBufferSize;
- BOOLEAN LastRead;
-
- DEBUG ((EFI_D_ERROR, "DiskIoReadDisk\n"));
-
- Private = DISK_IO_PRIVATE_DATA_FROM_THIS (This);
-
- BlockIo = Private->BlockIo;
- Media = BlockIo->Media;
- BlockSize = Media->BlockSize;
-
- if (Media->MediaId != MediaId) {
- return EFI_MEDIA_CHANGED;
- }
-
- WorkingBuffer = Buffer;
- WorkingBufferSize = BufferSize;
-
- //
- // Allocate a temporary buffer for operation
- //
- DataBufferSize = BlockSize * DATA_BUFFER_BLOCK_NUM;
-
- if (Media->IoAlign > 1) {
- PreData = AllocatePool (DataBufferSize + Media->IoAlign);
- Data = PreData - ((UINTN) PreData & (Media->IoAlign - 1)) + Media->IoAlign;
- } else {
- PreData = AllocatePool (DataBufferSize);
- Data = PreData;
- }
-
- if (PreData == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
-
- Lba = DivU64x32Remainder (Offset, BlockSize, &UnderRun);
-
- Length = BlockSize - UnderRun;
- TransactionComplete = FALSE;
-
- Status = EFI_SUCCESS;
- if (UnderRun != 0) {
- //
- // Offset starts in the middle of an Lba, so read the entire block.
- //
- Status = BlockIo->ReadBlocks (
- BlockIo,
- MediaId,
- Lba,
- BlockSize,
- Data
- );
-
- if (EFI_ERROR (Status)) {
- goto Done;
- }
-
- if (Length > BufferSize) {
- Length = BufferSize;
- TransactionComplete = TRUE;
- }
-
- CopyMem (WorkingBuffer, Data + UnderRun, Length);
-
- WorkingBuffer += Length;
-
- WorkingBufferSize -= Length;
- if (WorkingBufferSize == 0) {
- goto Done;
- }
-
- Lba += 1;
- }
-
- OverRunLba = Lba + DivU64x32Remainder (WorkingBufferSize, BlockSize, &OverRun);
-
- if (!TransactionComplete && WorkingBufferSize >= BlockSize) {
- //
- // If the DiskIo maps directly to a BlockIo device do the read.
- //
- if (OverRun != 0) {
- WorkingBufferSize -= OverRun;
- }
- //
- // Check buffer alignment
- //
- IsBufferAligned = (UINTN) WorkingBuffer & (UINTN) (Media->IoAlign - 1);
-
- if (Media->IoAlign <= 1 || IsBufferAligned == 0) {
- //
- // Alignment is satisfied, so read them together
- //
- Status = BlockIo->ReadBlocks (
- BlockIo,
- MediaId,
- Lba,
- WorkingBufferSize,
- WorkingBuffer
- );
-
- if (EFI_ERROR (Status)) {
- goto Done;
- }
-
- WorkingBuffer += WorkingBufferSize;
-
- } else {
- //
- // Use the allocated buffer instead of the original buffer
- // to avoid alignment issue.
- // Here, the allocated buffer (8-byte align) can satisfy the alignment
- //
- LastRead = FALSE;
- do {
- if (WorkingBufferSize <= DataBufferSize) {
- //
- // It is the last calling to readblocks in this loop
- //
- DataBufferSize = WorkingBufferSize;
- LastRead = TRUE;
- }
-
- Status = BlockIo->ReadBlocks (
- BlockIo,
- MediaId,
- Lba,
- DataBufferSize,
- Data
- );
- if (EFI_ERROR (Status)) {
- goto Done;
- }
-
- CopyMem (WorkingBuffer, Data, DataBufferSize);
- WorkingBufferSize -= DataBufferSize;
- WorkingBuffer += DataBufferSize;
- Lba += DATA_BUFFER_BLOCK_NUM;
- } while (!LastRead);
- }
- }
-
- if (!TransactionComplete && OverRun != 0) {
- //
- // Last read is not a complete block.
- //
- Status = BlockIo->ReadBlocks (
- BlockIo,
- MediaId,
- OverRunLba,
- BlockSize,
- Data
- );
-
- if (EFI_ERROR (Status)) {
- goto Done;
- }
-
- CopyMem (WorkingBuffer, Data, OverRun);
- }
-
-Done:
- if (PreData != NULL) {
- gBS->FreePool (PreData);
- }
-
- return Status;
-}
-
-EFI_STATUS
-EFIAPI
-DiskIoWriteDisk (
- IN EFI_DISK_IO_PROTOCOL *This,
- IN UINT32 MediaId,
- IN UINT64 Offset,
- IN UINTN BufferSize,
- IN VOID *Buffer
- )
-/*++
-
- Routine Description:
- Read BufferSize bytes from Offset into Buffer.
-
- Writes may require a read modify write to support writes that are not
- aligned on sector boundaries. There are three cases:
-
- UnderRun - The first byte is not on a sector boundary or the write request
- is less than a sector in length. Read modify write is required.
-
- Aligned - A write of N contiguous sectors.
-
- OverRun - The last byte is not on a sector boundary. Read modified write
- required.
-
- Arguments:
- This - Protocol instance pointer.
- MediaId - Id of the media, changes every time the media is replaced.
- Offset - The starting byte offset to read from.
- BufferSize - Size of Buffer.
- Buffer - Buffer containing read data.
-
- Returns:
- EFI_SUCCESS - The data was written correctly to the device.
- EFI_WRITE_PROTECTED - The device can not be written to.
- EFI_DEVICE_ERROR - The device reported an error while performing the write.
- EFI_NO_MEDIA - There is no media in the device.
- EFI_MEDIA_CHNAGED - The MediaId does not matched the current device.
- EFI_INVALID_PARAMETER - The write request contains device addresses that are not
- valid for the device.
- EFI_OUT_OF_RESOURCES
-
---*/
-{
- EFI_STATUS Status;
- DISK_IO_PRIVATE_DATA *Private;
- EFI_BLOCK_IO_PROTOCOL *BlockIo;
- EFI_BLOCK_IO_MEDIA *Media;
- UINT32 BlockSize;
- UINT64 Lba;
- UINT64 OverRunLba;
- UINT32 UnderRun;
- UINT32 OverRun;
- BOOLEAN TransactionComplete;
- UINTN WorkingBufferSize;
- UINT8 *WorkingBuffer;
- UINTN Length;
- UINT8 *Data;
- UINT8 *PreData;
- UINTN IsBufferAligned;
- UINTN DataBufferSize;
- BOOLEAN LastWrite;
-
- DEBUG ((EFI_D_ERROR, "DiskIoWriteDisk\n"));
-
- Private = DISK_IO_PRIVATE_DATA_FROM_THIS (This);
-
- BlockIo = Private->BlockIo;
- Media = BlockIo->Media;
- BlockSize = Media->BlockSize;
-
- if (Media->ReadOnly) {
- return EFI_WRITE_PROTECTED;
- }
-
- if (Media->MediaId != MediaId) {
- return EFI_MEDIA_CHANGED;
- }
-
- DataBufferSize = BlockSize * DATA_BUFFER_BLOCK_NUM;
-
- if (Media->IoAlign > 1) {
- PreData = AllocatePool (DataBufferSize + Media->IoAlign);
- Data = PreData - ((UINTN) PreData & (Media->IoAlign - 1)) + Media->IoAlign;
- } else {
- PreData = AllocatePool (DataBufferSize);
- Data = PreData;
- }
-
- if (PreData == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
-
- WorkingBuffer = Buffer;
- WorkingBufferSize = BufferSize;
-
- Lba = DivU64x32Remainder (Offset, BlockSize, &UnderRun);
-
- Length = BlockSize - UnderRun;
- TransactionComplete = FALSE;
-
- Status = EFI_SUCCESS;
- if (UnderRun != 0) {
- //
- // Offset starts in the middle of an Lba, so do read modify write.
- //
- Status = BlockIo->ReadBlocks (
- BlockIo,
- MediaId,
- Lba,
- BlockSize,
- Data
- );
-
- if (EFI_ERROR (Status)) {
- goto Done;
- }
-
- if (Length > BufferSize) {
- Length = BufferSize;
- TransactionComplete = TRUE;
- }
-
- CopyMem (Data + UnderRun, WorkingBuffer, Length);
-
- Status = BlockIo->WriteBlocks (
- BlockIo,
- MediaId,
- Lba,
- BlockSize,
- Data
- );
- if (EFI_ERROR (Status)) {
- goto Done;
- }
-
- WorkingBuffer += Length;
- WorkingBufferSize -= Length;
- if (WorkingBufferSize == 0) {
- goto Done;
- }
-
- Lba += 1;
- }
-
- OverRunLba = Lba + DivU64x32Remainder (WorkingBufferSize, BlockSize, &OverRun);
-
- if (!TransactionComplete && WorkingBufferSize >= BlockSize) {
- //
- // If the DiskIo maps directly to a BlockIo device do the write.
- //
- if (OverRun != 0) {
- WorkingBufferSize -= OverRun;
- }
- //
- // Check buffer alignment
- //
- IsBufferAligned = (UINTN) WorkingBuffer & (UINTN) (Media->IoAlign - 1);
-
- if (Media->IoAlign <= 1 || IsBufferAligned == 0) {
- //
- // Alignment is satisfied, so write them together
- //
- Status = BlockIo->WriteBlocks (
- BlockIo,
- MediaId,
- Lba,
- WorkingBufferSize,
- WorkingBuffer
- );
-
- if (EFI_ERROR (Status)) {
- goto Done;
- }
-
- WorkingBuffer += WorkingBufferSize;
-
- } else {
- //
- // The buffer parameter is not aligned with the request
- // So use the allocated instead.
- // It can fit almost all the cases.
- //
- LastWrite = FALSE;
- do {
- if (WorkingBufferSize <= DataBufferSize) {
- //
- // It is the last calling to writeblocks in this loop
- //
- DataBufferSize = WorkingBufferSize;
- LastWrite = TRUE;
- }
-
- CopyMem (Data, WorkingBuffer, DataBufferSize);
- Status = BlockIo->WriteBlocks (
- BlockIo,
- MediaId,
- Lba,
- DataBufferSize,
- Data
- );
- if (EFI_ERROR (Status)) {
- goto Done;
- }
-
- WorkingBufferSize -= DataBufferSize;
- WorkingBuffer += DataBufferSize;
- Lba += DATA_BUFFER_BLOCK_NUM;
- } while (!LastWrite);
- }
- }
-
- if (!TransactionComplete && OverRun != 0) {
- //
- // Last bit is not a complete block, so do a read modify write.
- //
- Status = BlockIo->ReadBlocks (
- BlockIo,
- MediaId,
- OverRunLba,
- BlockSize,
- Data
- );
-
- if (EFI_ERROR (Status)) {
- goto Done;
- }
-
- CopyMem (Data, WorkingBuffer, OverRun);
-
- Status = BlockIo->WriteBlocks (
- BlockIo,
- MediaId,
- OverRunLba,
- BlockSize,
- Data
- );
- if (EFI_ERROR (Status)) {
- goto Done;
- }
- }
-
-Done:
- if (PreData != NULL) {
- gBS->FreePool (PreData);
- }
-
- return Status;
-}
+/*++
+
+Copyright (c) 2006, Intel Corporation
+All rights reserved. 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.
+
+Module Name:
+
+ DiskIo.c
+
+Abstract:
+
+ DiskIo driver that layers it's self on every Block IO protocol in the system.
+ DiskIo converts a block oriented device to a byte oriented device.
+
+ ReadDisk may have to do reads that are not aligned on sector boundaries.
+ There are three cases:
+
+ UnderRun - The first byte is not on a sector boundary or the read request is
+ less than a sector in length.
+
+ Aligned - A read of N contiguous sectors.
+
+ OverRun - The last byte is not on a sector boundary.
+
+--*/
+
+#include "DiskIo.h"
+
+//
+// Prototypes
+// Driver model protocol interface
+//
+EFI_STATUS
+EFIAPI
+DiskIoDriverBindingSupported (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
+ );
+
+EFI_STATUS
+EFIAPI
+DiskIoDriverBindingStart (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
+ );
+
+EFI_STATUS
+EFIAPI
+DiskIoDriverBindingStop (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN UINTN NumberOfChildren,
+ IN EFI_HANDLE *ChildHandleBuffer
+ );
+
+//
+// Disk I/O Protocol Interface
+//
+EFI_STATUS
+EFIAPI
+DiskIoReadDisk (
+ IN EFI_DISK_IO_PROTOCOL *This,
+ IN UINT32 MediaId,
+ IN UINT64 Offset,
+ IN UINTN BufferSize,
+ OUT VOID *Buffer
+ );
+
+EFI_STATUS
+EFIAPI
+DiskIoWriteDisk (
+ IN EFI_DISK_IO_PROTOCOL *This,
+ IN UINT32 MediaId,
+ IN UINT64 Offset,
+ IN UINTN BufferSize,
+ IN VOID *Buffer
+ );
+
+EFI_DRIVER_BINDING_PROTOCOL gDiskIoDriverBinding = {
+ DiskIoDriverBindingSupported,
+ DiskIoDriverBindingStart,
+ DiskIoDriverBindingStop,
+ 0x10,
+ NULL,
+ NULL
+};
+
+DISK_IO_PRIVATE_DATA gDiskIoPrivateDataTemplate = {
+ DISK_IO_PRIVATE_DATA_SIGNATURE,
+ {
+ EFI_DISK_IO_PROTOCOL_REVISION,
+ DiskIoReadDisk,
+ DiskIoWriteDisk
+ },
+ NULL
+};
+
+EFI_STATUS
+EFIAPI
+DiskIoDriverBindingSupported (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
+ )
+/*++
+
+ Routine Description:
+ Test to see if this driver supports ControllerHandle. Any ControllerHandle
+ than contains a BlockIo protocol can be supported.
+
+ Arguments:
+ This - Protocol instance pointer.
+ ControllerHandle - Handle of device to test.
+ RemainingDevicePath - Not used.
+
+ Returns:
+ EFI_SUCCESS - This driver supports this device.
+ EFI_ALREADY_STARTED - This driver is already running on this device.
+ other - This driver does not support this device.
+
+--*/
+{
+ EFI_STATUS Status;
+ EFI_BLOCK_IO_PROTOCOL *BlockIo;
+
+ //
+ // Open the IO Abstraction(s) needed to perform the supported test.
+ //
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEfiBlockIoProtocolGuid,
+ (VOID **) &BlockIo,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_BY_DRIVER
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ //
+ // Close the I/O Abstraction(s) used to perform the supported test.
+ //
+ gBS->CloseProtocol (
+ ControllerHandle,
+ &gEfiBlockIoProtocolGuid,
+ This->DriverBindingHandle,
+ ControllerHandle
+ );
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+EFIAPI
+DiskIoDriverBindingStart (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
+ )
+/*++
+
+ Routine Description:
+ Start this driver on ControllerHandle by opening a Block IO protocol and
+ installing a Disk IO protocol on ControllerHandle.
+
+ Arguments:
+ This - Protocol instance pointer.
+ ControllerHandle - Handle of device to bind driver to.
+ RemainingDevicePath - Not used, always produce all possible children.
+
+ Returns:
+ EFI_SUCCESS - This driver is added to ControllerHandle.
+ EFI_ALREADY_STARTED - This driver is already running on ControllerHandle.
+ other - This driver does not support this device.
+
+--*/
+{
+ EFI_STATUS Status;
+ DISK_IO_PRIVATE_DATA *Private;
+
+ Private = NULL;
+
+ //
+ // Connect to the Block IO interface on ControllerHandle.
+ //
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEfiBlockIoProtocolGuid,
+ (VOID **) &gDiskIoPrivateDataTemplate.BlockIo,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_BY_DRIVER
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ //
+ // Initialize the Disk IO device instance.
+ //
+ Private = AllocateCopyPool (sizeof (DISK_IO_PRIVATE_DATA), &gDiskIoPrivateDataTemplate);
+ if (Private == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto ErrorExit;
+ }
+ //
+ // Install protocol interfaces for the Disk IO device.
+ //
+ Status = gBS->InstallProtocolInterface (
+ &ControllerHandle,
+ &gEfiDiskIoProtocolGuid,
+ EFI_NATIVE_INTERFACE,
+ &Private->DiskIo
+ );
+
+ErrorExit:
+ if (EFI_ERROR (Status)) {
+
+ if (Private != NULL) {
+ gBS->FreePool (Private);
+ }
+
+ gBS->CloseProtocol (
+ ControllerHandle,
+ &gEfiBlockIoProtocolGuid,
+ This->DriverBindingHandle,
+ ControllerHandle
+ );
+ }
+
+ return Status;
+}
+
+EFI_STATUS
+EFIAPI
+DiskIoDriverBindingStop (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN UINTN NumberOfChildren,
+ IN EFI_HANDLE *ChildHandleBuffer
+ )
+/*++
+
+ Routine Description:
+ Stop this driver on ControllerHandle by removing Disk IO protocol and closing
+ the Block IO protocol on ControllerHandle.
+
+ Arguments:
+ This - Protocol instance pointer.
+ ControllerHandle - Handle of device to stop driver on.
+ NumberOfChildren - Not used.
+ ChildHandleBuffer - Not used.
+
+ Returns:
+ EFI_SUCCESS - This driver is removed ControllerHandle.
+ other - This driver was not removed from this device.
+ EFI_UNSUPPORTED
+
+--*/
+{
+ EFI_STATUS Status;
+ EFI_DISK_IO_PROTOCOL *DiskIo;
+ DISK_IO_PRIVATE_DATA *Private;
+
+ //
+ // Get our context back.
+ //
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEfiDiskIoProtocolGuid,
+ (VOID **) &DiskIo,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL
+ );
+ if (EFI_ERROR (Status)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ Private = DISK_IO_PRIVATE_DATA_FROM_THIS (DiskIo);
+
+ Status = gBS->UninstallProtocolInterface (
+ ControllerHandle,
+ &gEfiDiskIoProtocolGuid,
+ &Private->DiskIo
+ );
+ if (!EFI_ERROR (Status)) {
+
+ Status = gBS->CloseProtocol (
+ ControllerHandle,
+ &gEfiBlockIoProtocolGuid,
+ This->DriverBindingHandle,
+ ControllerHandle
+ );
+ }
+
+ if (!EFI_ERROR (Status)) {
+ gBS->FreePool (Private);
+ }
+
+ return Status;
+}
+
+EFI_STATUS
+EFIAPI
+DiskIoReadDisk (
+ IN EFI_DISK_IO_PROTOCOL *This,
+ IN UINT32 MediaId,
+ IN UINT64 Offset,
+ IN UINTN BufferSize,
+ OUT VOID *Buffer
+ )
+/*++
+
+ Routine Description:
+ Read BufferSize bytes from Offset into Buffer.
+
+ Reads may support reads that are not aligned on
+ sector boundaries. There are three cases:
+
+ UnderRun - The first byte is not on a sector boundary or the read request is
+ less than a sector in length.
+
+ Aligned - A read of N contiguous sectors.
+
+ OverRun - The last byte is not on a sector boundary.
+
+
+ Arguments:
+ This - Protocol instance pointer.
+ MediaId - Id of the media, changes every time the media is replaced.
+ Offset - The starting byte offset to read from.
+ BufferSize - Size of Buffer.
+ Buffer - Buffer containing read data.
+
+ Returns:
+ EFI_SUCCESS - The data was read correctly from the device.
+ EFI_DEVICE_ERROR - The device reported an error while performing the read.
+ EFI_NO_MEDIA - There is no media in the device.
+ EFI_MEDIA_CHNAGED - The MediaId does not matched the current device.
+ EFI_INVALID_PARAMETER - The read request contains device addresses that are not
+ valid for the device.
+ EFI_OUT_OF_RESOURCES
+
+--*/
+{
+ EFI_STATUS Status;
+ DISK_IO_PRIVATE_DATA *Private;
+ EFI_BLOCK_IO_PROTOCOL *BlockIo;
+ EFI_BLOCK_IO_MEDIA *Media;
+ UINT32 BlockSize;
+ UINT64 Lba;
+ UINT64 OverRunLba;
+ UINT32 UnderRun;
+ UINT32 OverRun;
+ BOOLEAN TransactionComplete;
+ UINTN WorkingBufferSize;
+ UINT8 *WorkingBuffer;
+ UINTN Length;
+ UINT8 *Data;
+ UINT8 *PreData;
+ UINTN IsBufferAligned;
+ UINTN DataBufferSize;
+ BOOLEAN LastRead;
+
+ Private = DISK_IO_PRIVATE_DATA_FROM_THIS (This);
+
+ BlockIo = Private->BlockIo;
+ Media = BlockIo->Media;
+ BlockSize = Media->BlockSize;
+
+ if (Media->MediaId != MediaId) {
+ return EFI_MEDIA_CHANGED;
+ }
+
+ WorkingBuffer = Buffer;
+ WorkingBufferSize = BufferSize;
+
+ //
+ // Allocate a temporary buffer for operation
+ //
+ DataBufferSize = BlockSize * DATA_BUFFER_BLOCK_NUM;
+
+ if (Media->IoAlign > 1) {
+ PreData = AllocatePool (DataBufferSize + Media->IoAlign);
+ Data = PreData - ((UINTN) PreData & (Media->IoAlign - 1)) + Media->IoAlign;
+ } else {
+ PreData = AllocatePool (DataBufferSize);
+ Data = PreData;
+ }
+
+ if (PreData == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ Lba = DivU64x32Remainder (Offset, BlockSize, &UnderRun);
+
+ Length = BlockSize - UnderRun;
+ TransactionComplete = FALSE;
+
+ Status = EFI_SUCCESS;
+ if (UnderRun != 0) {
+ //
+ // Offset starts in the middle of an Lba, so read the entire block.
+ //
+ Status = BlockIo->ReadBlocks (
+ BlockIo,
+ MediaId,
+ Lba,
+ BlockSize,
+ Data
+ );
+
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ if (Length > BufferSize) {
+ Length = BufferSize;
+ TransactionComplete = TRUE;
+ }
+
+ CopyMem (WorkingBuffer, Data + UnderRun, Length);
+
+ WorkingBuffer += Length;
+
+ WorkingBufferSize -= Length;
+ if (WorkingBufferSize == 0) {
+ goto Done;
+ }
+
+ Lba += 1;
+ }
+
+ OverRunLba = Lba + DivU64x32Remainder (WorkingBufferSize, BlockSize, &OverRun);
+
+ if (!TransactionComplete && WorkingBufferSize >= BlockSize) {
+ //
+ // If the DiskIo maps directly to a BlockIo device do the read.
+ //
+ if (OverRun != 0) {
+ WorkingBufferSize -= OverRun;
+ }
+ //
+ // Check buffer alignment
+ //
+ IsBufferAligned = (UINTN) WorkingBuffer & (UINTN) (Media->IoAlign - 1);
+
+ if (Media->IoAlign <= 1 || IsBufferAligned == 0) {
+ //
+ // Alignment is satisfied, so read them together
+ //
+ Status = BlockIo->ReadBlocks (
+ BlockIo,
+ MediaId,
+ Lba,
+ WorkingBufferSize,
+ WorkingBuffer
+ );
+
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ WorkingBuffer += WorkingBufferSize;
+
+ } else {
+ //
+ // Use the allocated buffer instead of the original buffer
+ // to avoid alignment issue.
+ // Here, the allocated buffer (8-byte align) can satisfy the alignment
+ //
+ LastRead = FALSE;
+ do {
+ if (WorkingBufferSize <= DataBufferSize) {
+ //
+ // It is the last calling to readblocks in this loop
+ //
+ DataBufferSize = WorkingBufferSize;
+ LastRead = TRUE;
+ }
+
+ Status = BlockIo->ReadBlocks (
+ BlockIo,
+ MediaId,
+ Lba,
+ DataBufferSize,
+ Data
+ );
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ CopyMem (WorkingBuffer, Data, DataBufferSize);
+ WorkingBufferSize -= DataBufferSize;
+ WorkingBuffer += DataBufferSize;
+ Lba += DATA_BUFFER_BLOCK_NUM;
+ } while (!LastRead);
+ }
+ }
+
+ if (!TransactionComplete && OverRun != 0) {
+ //
+ // Last read is not a complete block.
+ //
+ Status = BlockIo->ReadBlocks (
+ BlockIo,
+ MediaId,
+ OverRunLba,
+ BlockSize,
+ Data
+ );
+
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ CopyMem (WorkingBuffer, Data, OverRun);
+ }
+
+Done:
+ if (PreData != NULL) {
+ gBS->FreePool (PreData);
+ }
+
+ return Status;
+}
+
+EFI_STATUS
+EFIAPI
+DiskIoWriteDisk (
+ IN EFI_DISK_IO_PROTOCOL *This,
+ IN UINT32 MediaId,
+ IN UINT64 Offset,
+ IN UINTN BufferSize,
+ IN VOID *Buffer
+ )
+/*++
+
+ Routine Description:
+ Read BufferSize bytes from Offset into Buffer.
+
+ Writes may require a read modify write to support writes that are not
+ aligned on sector boundaries. There are three cases:
+
+ UnderRun - The first byte is not on a sector boundary or the write request
+ is less than a sector in length. Read modify write is required.
+
+ Aligned - A write of N contiguous sectors.
+
+ OverRun - The last byte is not on a sector boundary. Read modified write
+ required.
+
+ Arguments:
+ This - Protocol instance pointer.
+ MediaId - Id of the media, changes every time the media is replaced.
+ Offset - The starting byte offset to read from.
+ BufferSize - Size of Buffer.
+ Buffer - Buffer containing read data.
+
+ Returns:
+ EFI_SUCCESS - The data was written correctly to the device.
+ EFI_WRITE_PROTECTED - The device can not be written to.
+ EFI_DEVICE_ERROR - The device reported an error while performing the write.
+ EFI_NO_MEDIA - There is no media in the device.
+ EFI_MEDIA_CHNAGED - The MediaId does not matched the current device.
+ EFI_INVALID_PARAMETER - The write request contains device addresses that are not
+ valid for the device.
+ EFI_OUT_OF_RESOURCES
+
+--*/
+{
+ EFI_STATUS Status;
+ DISK_IO_PRIVATE_DATA *Private;
+ EFI_BLOCK_IO_PROTOCOL *BlockIo;
+ EFI_BLOCK_IO_MEDIA *Media;
+ UINT32 BlockSize;
+ UINT64 Lba;
+ UINT64 OverRunLba;
+ UINT32 UnderRun;
+ UINT32 OverRun;
+ BOOLEAN TransactionComplete;
+ UINTN WorkingBufferSize;
+ UINT8 *WorkingBuffer;
+ UINTN Length;
+ UINT8 *Data;
+ UINT8 *PreData;
+ UINTN IsBufferAligned;
+ UINTN DataBufferSize;
+ BOOLEAN LastWrite;
+
+ Private = DISK_IO_PRIVATE_DATA_FROM_THIS (This);
+
+ BlockIo = Private->BlockIo;
+ Media = BlockIo->Media;
+ BlockSize = Media->BlockSize;
+
+ if (Media->ReadOnly) {
+ return EFI_WRITE_PROTECTED;
+ }
+
+ if (Media->MediaId != MediaId) {
+ return EFI_MEDIA_CHANGED;
+ }
+
+ DataBufferSize = BlockSize * DATA_BUFFER_BLOCK_NUM;
+
+ if (Media->IoAlign > 1) {
+ PreData = AllocatePool (DataBufferSize + Media->IoAlign);
+ Data = PreData - ((UINTN) PreData & (Media->IoAlign - 1)) + Media->IoAlign;
+ } else {
+ PreData = AllocatePool (DataBufferSize);
+ Data = PreData;
+ }
+
+ if (PreData == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ WorkingBuffer = Buffer;
+ WorkingBufferSize = BufferSize;
+
+ Lba = DivU64x32Remainder (Offset, BlockSize, &UnderRun);
+
+ Length = BlockSize - UnderRun;
+ TransactionComplete = FALSE;
+
+ Status = EFI_SUCCESS;
+ if (UnderRun != 0) {
+ //
+ // Offset starts in the middle of an Lba, so do read modify write.
+ //
+ Status = BlockIo->ReadBlocks (
+ BlockIo,
+ MediaId,
+ Lba,
+ BlockSize,
+ Data
+ );
+
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ if (Length > BufferSize) {
+ Length = BufferSize;
+ TransactionComplete = TRUE;
+ }
+
+ CopyMem (Data + UnderRun, WorkingBuffer, Length);
+
+ Status = BlockIo->WriteBlocks (
+ BlockIo,
+ MediaId,
+ Lba,
+ BlockSize,
+ Data
+ );
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ WorkingBuffer += Length;
+ WorkingBufferSize -= Length;
+ if (WorkingBufferSize == 0) {
+ goto Done;
+ }
+
+ Lba += 1;
+ }
+
+ OverRunLba = Lba + DivU64x32Remainder (WorkingBufferSize, BlockSize, &OverRun);
+
+ if (!TransactionComplete && WorkingBufferSize >= BlockSize) {
+ //
+ // If the DiskIo maps directly to a BlockIo device do the write.
+ //
+ if (OverRun != 0) {
+ WorkingBufferSize -= OverRun;
+ }
+ //
+ // Check buffer alignment
+ //
+ IsBufferAligned = (UINTN) WorkingBuffer & (UINTN) (Media->IoAlign - 1);
+
+ if (Media->IoAlign <= 1 || IsBufferAligned == 0) {
+ //
+ // Alignment is satisfied, so write them together
+ //
+ Status = BlockIo->WriteBlocks (
+ BlockIo,
+ MediaId,
+ Lba,
+ WorkingBufferSize,
+ WorkingBuffer
+ );
+
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ WorkingBuffer += WorkingBufferSize;
+
+ } else {
+ //
+ // The buffer parameter is not aligned with the request
+ // So use the allocated instead.
+ // It can fit almost all the cases.
+ //
+ LastWrite = FALSE;
+ do {
+ if (WorkingBufferSize <= DataBufferSize) {
+ //
+ // It is the last calling to writeblocks in this loop
+ //
+ DataBufferSize = WorkingBufferSize;
+ LastWrite = TRUE;
+ }
+
+ CopyMem (Data, WorkingBuffer, DataBufferSize);
+ Status = BlockIo->WriteBlocks (
+ BlockIo,
+ MediaId,
+ Lba,
+ DataBufferSize,
+ Data
+ );
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ WorkingBufferSize -= DataBufferSize;
+ WorkingBuffer += DataBufferSize;
+ Lba += DATA_BUFFER_BLOCK_NUM;
+ } while (!LastWrite);
+ }
+ }
+
+ if (!TransactionComplete && OverRun != 0) {
+ //
+ // Last bit is not a complete block, so do a read modify write.
+ //
+ Status = BlockIo->ReadBlocks (
+ BlockIo,
+ MediaId,
+ OverRunLba,
+ BlockSize,
+ Data
+ );
+
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ CopyMem (Data, WorkingBuffer, OverRun);
+
+ Status = BlockIo->WriteBlocks (
+ BlockIo,
+ MediaId,
+ OverRunLba,
+ BlockSize,
+ Data
+ );
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+ }
+
+Done:
+ if (PreData != NULL) {
+ gBS->FreePool (PreData);
+ }
+
+ return Status;
+}