diff --git a/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ComponentName.c b/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ComponentName.c
index 1790825802..08b71d08f3 100644
--- a/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ComponentName.c
+++ b/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ComponentName.c
@@ -1,7 +1,7 @@
/** @file
UEFI Component Name(2) protocol implementation for SCSI disk driver.
-Copyright (c) 2004 - 2011, Intel Corporation. All rights reserved.
+Copyright (c) 2004 - 2015, 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
@@ -211,7 +211,7 @@ ScsiDiskComponentNameGetControllerName (
return Status;
}
- ScsiDiskDevice = SCSI_DISK_DEV_FROM_THIS (BlockIo);
+ ScsiDiskDevice = SCSI_DISK_DEV_FROM_BLKIO (BlockIo);
return LookupUnicodeString2 (
Language,
diff --git a/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.c b/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.c
index 282e9c2832..eb50889943 100644
--- a/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.c
+++ b/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.c
@@ -239,7 +239,13 @@ ScsiDiskDriverBindingStart (
ScsiDiskDevice->BlkIo.ReadBlocks = ScsiDiskReadBlocks;
ScsiDiskDevice->BlkIo.WriteBlocks = ScsiDiskWriteBlocks;
ScsiDiskDevice->BlkIo.FlushBlocks = ScsiDiskFlushBlocks;
+ ScsiDiskDevice->BlkIo2.Media = &ScsiDiskDevice->BlkIoMedia;
+ ScsiDiskDevice->BlkIo2.Reset = ScsiDiskResetEx;
+ ScsiDiskDevice->BlkIo2.ReadBlocksEx = ScsiDiskReadBlocksEx;
+ ScsiDiskDevice->BlkIo2.WriteBlocksEx = ScsiDiskWriteBlocksEx;
+ ScsiDiskDevice->BlkIo2.FlushBlocksEx = ScsiDiskFlushBlocksEx;
ScsiDiskDevice->Handle = Controller;
+ InitializeListHead (&ScsiDiskDevice->BlkIo2Queue);
ScsiIo->GetDeviceType (ScsiIo, &(ScsiDiskDevice->DeviceType));
switch (ScsiDiskDevice->DeviceType) {
@@ -300,7 +306,8 @@ ScsiDiskDriverBindingStart (
Status = ScsiDiskDetectMedia (ScsiDiskDevice, MustReadCapacity, &Temp);
if (!EFI_ERROR (Status)) {
//
- // Determine if Block IO should be produced on this controller handle
+ // Determine if Block IO & Block IO2 should be produced on this controller
+ // handle
//
if (DetermineInstallBlockIo(Controller)) {
InitializeInstallDiskInfo(ScsiDiskDevice, Controller);
@@ -308,6 +315,8 @@ ScsiDiskDriverBindingStart (
&Controller,
&gEfiBlockIoProtocolGuid,
&ScsiDiskDevice->BlkIo,
+ &gEfiBlockIo2ProtocolGuid,
+ &ScsiDiskDevice->BlkIo2,
&gEfiDiskInfoProtocolGuid,
&ScsiDiskDevice->DiskInfo,
NULL
@@ -390,11 +399,19 @@ ScsiDiskDriverBindingStop (
return Status;
}
- ScsiDiskDevice = SCSI_DISK_DEV_FROM_THIS (BlkIo);
+ ScsiDiskDevice = SCSI_DISK_DEV_FROM_BLKIO (BlkIo);
+
+ //
+ // Wait for the BlockIo2 requests queue to become empty
+ //
+ while (!IsListEmpty (&ScsiDiskDevice->BlkIo2Queue));
+
Status = gBS->UninstallMultipleProtocolInterfaces (
Controller,
&gEfiBlockIoProtocolGuid,
&ScsiDiskDevice->BlkIo,
+ &gEfiBlockIo2ProtocolGuid,
+ &ScsiDiskDevice->BlkIo2,
&gEfiDiskInfoProtocolGuid,
&ScsiDiskDevice->DiskInfo,
NULL
@@ -443,7 +460,7 @@ ScsiDiskReset (
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
- ScsiDiskDevice = SCSI_DISK_DEV_FROM_THIS (This);
+ ScsiDiskDevice = SCSI_DISK_DEV_FROM_BLKIO (This);
Status = ScsiDiskDevice->ScsiIo->ResetDevice (ScsiDiskDevice->ScsiIo);
@@ -505,7 +522,7 @@ ScsiDiskReadBlocks (
MediaChange = FALSE;
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
- ScsiDiskDevice = SCSI_DISK_DEV_FROM_THIS (This);
+ ScsiDiskDevice = SCSI_DISK_DEV_FROM_BLKIO (This);
if (!IS_DEVICE_FIXED(ScsiDiskDevice)) {
@@ -522,6 +539,12 @@ ScsiDiskReadBlocks (
&ScsiDiskDevice->BlkIo,
&ScsiDiskDevice->BlkIo
);
+ gBS->ReinstallProtocolInterface (
+ ScsiDiskDevice->Handle,
+ &gEfiBlockIo2ProtocolGuid,
+ &ScsiDiskDevice->BlkIo2,
+ &ScsiDiskDevice->BlkIo2
+ );
Status = EFI_MEDIA_CHANGED;
goto Done;
}
@@ -623,7 +646,7 @@ ScsiDiskWriteBlocks (
MediaChange = FALSE;
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
- ScsiDiskDevice = SCSI_DISK_DEV_FROM_THIS (This);
+ ScsiDiskDevice = SCSI_DISK_DEV_FROM_BLKIO (This);
if (!IS_DEVICE_FIXED(ScsiDiskDevice)) {
@@ -640,6 +663,12 @@ ScsiDiskWriteBlocks (
&ScsiDiskDevice->BlkIo,
&ScsiDiskDevice->BlkIo
);
+ gBS->ReinstallProtocolInterface (
+ ScsiDiskDevice->Handle,
+ &gEfiBlockIo2ProtocolGuid,
+ &ScsiDiskDevice->BlkIo2,
+ &ScsiDiskDevice->BlkIo2
+ );
Status = EFI_MEDIA_CHANGED;
goto Done;
}
@@ -725,6 +754,392 @@ ScsiDiskFlushBlocks (
}
+/**
+ Reset SCSI Disk.
+
+ @param This The pointer of EFI_BLOCK_IO2_PROTOCOL.
+ @param ExtendedVerification The flag about if extend verificate.
+
+ @retval EFI_SUCCESS The device was reset.
+ @retval EFI_DEVICE_ERROR The device is not functioning properly and could
+ not be reset.
+ @return EFI_STATUS is returned from EFI_SCSI_IO_PROTOCOL.ResetDevice().
+
+**/
+EFI_STATUS
+EFIAPI
+ScsiDiskResetEx (
+ IN EFI_BLOCK_IO2_PROTOCOL *This,
+ IN BOOLEAN ExtendedVerification
+ )
+{
+ EFI_TPL OldTpl;
+ SCSI_DISK_DEV *ScsiDiskDevice;
+ EFI_STATUS Status;
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ ScsiDiskDevice = SCSI_DISK_DEV_FROM_BLKIO2 (This);
+
+ Status = ScsiDiskDevice->ScsiIo->ResetDevice (ScsiDiskDevice->ScsiIo);
+
+ if (EFI_ERROR (Status)) {
+ Status = EFI_DEVICE_ERROR;
+ goto Done;
+ }
+
+ if (!ExtendedVerification) {
+ goto Done;
+ }
+
+ Status = ScsiDiskDevice->ScsiIo->ResetBus (ScsiDiskDevice->ScsiIo);
+
+ if (EFI_ERROR (Status)) {
+ Status = EFI_DEVICE_ERROR;
+ goto Done;
+ }
+
+Done:
+ gBS->RestoreTPL (OldTpl);
+ return Status;
+}
+
+/**
+ The function is to Read Block from SCSI Disk.
+
+ @param This The pointer of EFI_BLOCK_IO_PROTOCOL.
+ @param MediaId The Id of Media detected.
+ @param Lba The logic block address.
+ @param Token A pointer to the token associated with the transaction.
+ @param BufferSize The size of Buffer.
+ @param Buffer The buffer to fill the read out data.
+
+ @retval EFI_SUCCESS The read request was queued if Token-> Event is
+ not NULL. The data was read correctly from the
+ device if theToken-> Event is NULL.
+ @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.
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a
+ lack of resources.
+
+**/
+EFI_STATUS
+EFIAPI
+ScsiDiskReadBlocksEx (
+ 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
+ )
+{
+ SCSI_DISK_DEV *ScsiDiskDevice;
+ EFI_BLOCK_IO_MEDIA *Media;
+ EFI_STATUS Status;
+ UINTN BlockSize;
+ UINTN NumberOfBlocks;
+ BOOLEAN MediaChange;
+ EFI_TPL OldTpl;
+
+ MediaChange = FALSE;
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+ ScsiDiskDevice = SCSI_DISK_DEV_FROM_BLKIO2 (This);
+
+ if (!IS_DEVICE_FIXED(ScsiDiskDevice)) {
+
+ Status = ScsiDiskDetectMedia (ScsiDiskDevice, FALSE, &MediaChange);
+ if (EFI_ERROR (Status)) {
+ Status = EFI_DEVICE_ERROR;
+ goto Done;
+ }
+
+ if (MediaChange) {
+ gBS->ReinstallProtocolInterface (
+ ScsiDiskDevice->Handle,
+ &gEfiBlockIoProtocolGuid,
+ &ScsiDiskDevice->BlkIo,
+ &ScsiDiskDevice->BlkIo
+ );
+ gBS->ReinstallProtocolInterface (
+ ScsiDiskDevice->Handle,
+ &gEfiBlockIo2ProtocolGuid,
+ &ScsiDiskDevice->BlkIo2,
+ &ScsiDiskDevice->BlkIo2
+ );
+ Status = EFI_MEDIA_CHANGED;
+ goto Done;
+ }
+ }
+ //
+ // Get the intrinsic block size
+ //
+ Media = ScsiDiskDevice->BlkIo2.Media;
+ BlockSize = Media->BlockSize;
+
+ NumberOfBlocks = BufferSize / BlockSize;
+
+ if (!(Media->MediaPresent)) {
+ Status = EFI_NO_MEDIA;
+ goto Done;
+ }
+
+ if (MediaId != Media->MediaId) {
+ Status = EFI_MEDIA_CHANGED;
+ goto Done;
+ }
+
+ if (Buffer == NULL) {
+ Status = EFI_INVALID_PARAMETER;
+ goto Done;
+ }
+
+ if (BufferSize == 0) {
+ if ((Token != NULL) && (Token->Event != NULL)) {
+ Token->TransactionStatus = EFI_SUCCESS;
+ gBS->SignalEvent (Token->Event);
+ }
+
+ Status = EFI_SUCCESS;
+ goto Done;
+ }
+
+ if (BufferSize % BlockSize != 0) {
+ Status = EFI_BAD_BUFFER_SIZE;
+ goto Done;
+ }
+
+ if (Lba > Media->LastBlock) {
+ Status = EFI_INVALID_PARAMETER;
+ goto Done;
+ }
+
+ if ((Lba + NumberOfBlocks - 1) > Media->LastBlock) {
+ Status = EFI_INVALID_PARAMETER;
+ goto Done;
+ }
+
+ if ((Media->IoAlign > 1) && (((UINTN) Buffer & (Media->IoAlign - 1)) != 0)) {
+ Status = EFI_INVALID_PARAMETER;
+ goto Done;
+ }
+
+ //
+ // If all the parameters are valid, then perform read sectors command
+ // to transfer data from device to host.
+ //
+ if ((Token != NULL) && (Token->Event != NULL)) {
+ Token->TransactionStatus = EFI_SUCCESS;
+ Status = ScsiDiskAsyncReadSectors (
+ ScsiDiskDevice,
+ Buffer,
+ Lba,
+ NumberOfBlocks,
+ Token
+ );
+ } else {
+ Status = ScsiDiskReadSectors (
+ ScsiDiskDevice,
+ Buffer,
+ Lba,
+ NumberOfBlocks
+ );
+ }
+
+Done:
+ gBS->RestoreTPL (OldTpl);
+ return Status;
+}
+
+/**
+ The function is to Write Block to SCSI Disk.
+
+ @param This The pointer of EFI_BLOCK_IO_PROTOCOL.
+ @param MediaId The Id of Media detected.
+ @param Lba The logic block address.
+ @param Token A pointer to the token associated with the transaction.
+ @param BufferSize The size of Buffer.
+ @param Buffer The buffer to fill the read out 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
+ScsiDiskWriteBlocksEx (
+ 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
+ )
+{
+ SCSI_DISK_DEV *ScsiDiskDevice;
+ EFI_BLOCK_IO_MEDIA *Media;
+ EFI_STATUS Status;
+ UINTN BlockSize;
+ UINTN NumberOfBlocks;
+ BOOLEAN MediaChange;
+ EFI_TPL OldTpl;
+
+ MediaChange = FALSE;
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+ ScsiDiskDevice = SCSI_DISK_DEV_FROM_BLKIO2 (This);
+
+ if (!IS_DEVICE_FIXED(ScsiDiskDevice)) {
+
+ Status = ScsiDiskDetectMedia (ScsiDiskDevice, FALSE, &MediaChange);
+ if (EFI_ERROR (Status)) {
+ Status = EFI_DEVICE_ERROR;
+ goto Done;
+ }
+
+ if (MediaChange) {
+ gBS->ReinstallProtocolInterface (
+ ScsiDiskDevice->Handle,
+ &gEfiBlockIoProtocolGuid,
+ &ScsiDiskDevice->BlkIo,
+ &ScsiDiskDevice->BlkIo
+ );
+ gBS->ReinstallProtocolInterface (
+ ScsiDiskDevice->Handle,
+ &gEfiBlockIo2ProtocolGuid,
+ &ScsiDiskDevice->BlkIo2,
+ &ScsiDiskDevice->BlkIo2
+ );
+ Status = EFI_MEDIA_CHANGED;
+ goto Done;
+ }
+ }
+ //
+ // Get the intrinsic block size
+ //
+ Media = ScsiDiskDevice->BlkIo2.Media;
+ BlockSize = Media->BlockSize;
+
+ NumberOfBlocks = BufferSize / BlockSize;
+
+ if (!(Media->MediaPresent)) {
+ Status = EFI_NO_MEDIA;
+ goto Done;
+ }
+
+ if (MediaId != Media->MediaId) {
+ Status = EFI_MEDIA_CHANGED;
+ goto Done;
+ }
+
+ if (BufferSize == 0) {
+ if ((Token != NULL) && (Token->Event != NULL)) {
+ Token->TransactionStatus = EFI_SUCCESS;
+ gBS->SignalEvent (Token->Event);
+ }
+
+ Status = EFI_SUCCESS;
+ goto Done;
+ }
+
+ if (Buffer == NULL) {
+ Status = EFI_INVALID_PARAMETER;
+ goto Done;
+ }
+
+ if (BufferSize % BlockSize != 0) {
+ Status = EFI_BAD_BUFFER_SIZE;
+ goto Done;
+ }
+
+ if (Lba > Media->LastBlock) {
+ Status = EFI_INVALID_PARAMETER;
+ goto Done;
+ }
+
+ if ((Lba + NumberOfBlocks - 1) > Media->LastBlock) {
+ Status = EFI_INVALID_PARAMETER;
+ goto Done;
+ }
+
+ if ((Media->IoAlign > 1) && (((UINTN) Buffer & (Media->IoAlign - 1)) != 0)) {
+ Status = EFI_INVALID_PARAMETER;
+ goto Done;
+ }
+
+ //
+ // if all the parameters are valid, then perform write sectors command
+ // to transfer data from device to host.
+ //
+ if ((Token != NULL) && (Token->Event != NULL)) {
+ Token->TransactionStatus = EFI_SUCCESS;
+ Status = ScsiDiskAsyncWriteSectors (
+ ScsiDiskDevice,
+ Buffer,
+ Lba,
+ NumberOfBlocks,
+ Token
+ );
+ } else {
+ Status = ScsiDiskWriteSectors (
+ ScsiDiskDevice,
+ Buffer,
+ Lba,
+ NumberOfBlocks
+ );
+ }
+
+Done:
+ gBS->RestoreTPL (OldTpl);
+ return Status;
+}
+
+/**
+ Flush the Block Device.
+
+ @param This Indicates a pointer to the calling context.
+ @param Token A pointer to the token associated with the transaction.
+
+ @retval EFI_SUCCESS All outstanding data was written to the device.
+ @retval EFI_DEVICE_ERROR The device reported an error while writing back the
+ data.
+ @retval EFI_NO_MEDIA There is no media in the device.
+
+**/
+EFI_STATUS
+EFIAPI
+ScsiDiskFlushBlocksEx (
+ IN EFI_BLOCK_IO2_PROTOCOL *This,
+ IN OUT EFI_BLOCK_IO2_TOKEN *Token
+ )
+{
+ //
+ // Signal event and return directly.
+ //
+ if ((Token != NULL) && (Token->Event != NULL)) {
+ Token->TransactionStatus = EFI_SUCCESS;
+ gBS->SignalEvent (Token->Event);
+ }
+
+ return EFI_SUCCESS;
+}
+
+
/**
Detect Device and read out capacity ,if error occurs, parse the sense key.
@@ -2091,6 +2506,328 @@ ScsiDiskWriteSectors (
return EFI_SUCCESS;
}
+/**
+ Asynchronously read sector from SCSI Disk.
+
+ @param ScsiDiskDevice The pointer of SCSI_DISK_DEV.
+ @param Buffer The buffer to fill in the read out data.
+ @param Lba Logic block address.
+ @param NumberOfBlocks The number of blocks to read.
+ @param Token A pointer to the token associated with the
+ non-blocking read request.
+
+ @retval EFI_INVALID_PARAMETER Token is NULL or Token->Event is NULL.
+ @retval EFI_DEVICE_ERROR Indicates a device error.
+ @retval EFI_SUCCESS Operation is successful.
+
+**/
+EFI_STATUS
+ScsiDiskAsyncReadSectors (
+ IN SCSI_DISK_DEV *ScsiDiskDevice,
+ OUT VOID *Buffer,
+ IN EFI_LBA Lba,
+ IN UINTN NumberOfBlocks,
+ IN EFI_BLOCK_IO2_TOKEN *Token
+ )
+{
+ UINTN BlocksRemaining;
+ UINT8 *PtrBuffer;
+ UINT32 BlockSize;
+ UINT32 ByteCount;
+ UINT32 MaxBlock;
+ UINT32 SectorCount;
+ UINT64 Timeout;
+ SCSI_BLKIO2_REQUEST *BlkIo2Req;
+ EFI_STATUS Status;
+
+ if ((Token == NULL) || (Token->Event == NULL)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ BlkIo2Req = AllocateZeroPool (sizeof (SCSI_BLKIO2_REQUEST));
+ if (BlkIo2Req == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ BlkIo2Req->Token = Token;
+ InsertTailList (&ScsiDiskDevice->BlkIo2Queue, &BlkIo2Req->Link);
+ InitializeListHead (&BlkIo2Req->ScsiRWQueue);
+
+ Status = EFI_SUCCESS;
+
+ BlocksRemaining = NumberOfBlocks;
+ BlockSize = ScsiDiskDevice->BlkIo.Media->BlockSize;
+
+ //
+ // Limit the data bytes that can be transferred by one Read(10) or Read(16)
+ // Command
+ //
+ if (!ScsiDiskDevice->Cdb16Byte) {
+ MaxBlock = 0xFFFF;
+ } else {
+ MaxBlock = 0xFFFFFFFF;
+ }
+
+ PtrBuffer = Buffer;
+
+ while (BlocksRemaining > 0) {
+
+ if (BlocksRemaining <= MaxBlock) {
+ if (!ScsiDiskDevice->Cdb16Byte) {
+ SectorCount = (UINT16) BlocksRemaining;
+ } else {
+ SectorCount = (UINT32) BlocksRemaining;
+ }
+ } else {
+ SectorCount = MaxBlock;
+ }
+
+ ByteCount = SectorCount * BlockSize;
+ //
+ // |------------------------|-----------------|------------------|-----------------|
+ // | ATA Transfer Mode | Transfer Rate | SCSI Interface | Transfer Rate |
+ // |------------------------|-----------------|------------------|-----------------|
+ // | PIO Mode 0 | 3.3Mbytes/sec | SCSI-1 | 5Mbytes/sec |
+ // |------------------------|-----------------|------------------|-----------------|
+ // | PIO Mode 1 | 5.2Mbytes/sec | Fast SCSI | 10Mbytes/sec |
+ // |------------------------|-----------------|------------------|-----------------|
+ // | PIO Mode 2 | 8.3Mbytes/sec | Fast-Wide SCSI | 20Mbytes/sec |
+ // |------------------------|-----------------|------------------|-----------------|
+ // | PIO Mode 3 | 11.1Mbytes/sec | Ultra SCSI | 20Mbytes/sec |
+ // |------------------------|-----------------|------------------|-----------------|
+ // | PIO Mode 4 | 16.6Mbytes/sec | Ultra Wide SCSI | 40Mbytes/sec |
+ // |------------------------|-----------------|------------------|-----------------|
+ // | Single-word DMA Mode 0 | 2.1Mbytes/sec | Ultra2 SCSI | 40Mbytes/sec |
+ // |------------------------|-----------------|------------------|-----------------|
+ // | Single-word DMA Mode 1 | 4.2Mbytes/sec | Ultra2 Wide SCSI | 80Mbytes/sec |
+ // |------------------------|-----------------|------------------|-----------------|
+ // | Single-word DMA Mode 2 | 8.4Mbytes/sec | Ultra3 SCSI | 160Mbytes/sec |
+ // |------------------------|-----------------|------------------|-----------------|
+ // | Multi-word DMA Mode 0 | 4.2Mbytes/sec | Ultra-320 SCSI | 320Mbytes/sec |
+ // |------------------------|-----------------|------------------|-----------------|
+ // | Multi-word DMA Mode 1 | 13.3Mbytes/sec | Ultra-640 SCSI | 640Mbytes/sec |
+ // |------------------------|-----------------|------------------|-----------------|
+ //
+ // As ScsiDisk and ScsiBus driver are used to manage SCSI or ATAPI devices,
+ // we have to use the lowest transfer rate to calculate the possible
+ // maximum timeout value for each operation.
+ // From the above table, we could know 2.1Mbytes per second is lowest one.
+ // The timout value is rounded up to nearest integar and here an additional
+ // 30s is added to follow ATA spec in which it mentioned that the device
+ // may take up to 30s to respond commands in the Standby/Idle mode.
+ //
+ Timeout = EFI_TIMER_PERIOD_SECONDS (ByteCount / 2100000 + 31);
+
+ if (!ScsiDiskDevice->Cdb16Byte) {
+ Status = ScsiDiskAsyncRead10 (
+ ScsiDiskDevice,
+ Timeout,
+ PtrBuffer,
+ ByteCount,
+ (UINT32) Lba,
+ SectorCount,
+ BlkIo2Req,
+ Token
+ );
+ } else {
+ Status = ScsiDiskAsyncRead16 (
+ ScsiDiskDevice,
+ Timeout,
+ PtrBuffer,
+ ByteCount,
+ Lba,
+ SectorCount,
+ BlkIo2Req,
+ Token
+ );
+ }
+ if (EFI_ERROR (Status)) {
+ //
+ // Free the SCSI_BLKIO2_REQUEST structure only when the first SCSI
+ // command fails. Otherwise, it will be freed in the callback function
+ // ScsiDiskNotify().
+ //
+ if (IsListEmpty (&BlkIo2Req->ScsiRWQueue)) {
+ RemoveEntryList (&BlkIo2Req->Link);
+ FreePool (BlkIo2Req);
+ }
+ return EFI_DEVICE_ERROR;
+ }
+
+ //
+ // Sectors submitted for transfer
+ //
+ SectorCount = ByteCount / BlockSize;
+
+ Lba += SectorCount;
+ PtrBuffer = PtrBuffer + SectorCount * BlockSize;
+ BlocksRemaining -= SectorCount;
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Asynchronously write sector to SCSI Disk.
+
+ @param ScsiDiskDevice The pointer of SCSI_DISK_DEV.
+ @param Buffer The buffer of data to be written into SCSI Disk.
+ @param Lba Logic block address.
+ @param NumberOfBlocks The number of blocks to read.
+ @param Token A pointer to the token associated with the
+ non-blocking read request.
+
+ @retval EFI_INVALID_PARAMETER Token is NULL or Token->Event is NULL
+ @retval EFI_DEVICE_ERROR Indicates a device error.
+ @retval EFI_SUCCESS Operation is successful.
+
+**/
+EFI_STATUS
+ScsiDiskAsyncWriteSectors (
+ IN SCSI_DISK_DEV *ScsiDiskDevice,
+ IN VOID *Buffer,
+ IN EFI_LBA Lba,
+ IN UINTN NumberOfBlocks,
+ IN EFI_BLOCK_IO2_TOKEN *Token
+ )
+{
+ UINTN BlocksRemaining;
+ UINT8 *PtrBuffer;
+ UINT32 BlockSize;
+ UINT32 ByteCount;
+ UINT32 MaxBlock;
+ UINT32 SectorCount;
+ UINT64 Timeout;
+ SCSI_BLKIO2_REQUEST *BlkIo2Req;
+ EFI_STATUS Status;
+
+ if ((Token == NULL) || (Token->Event == NULL)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ BlkIo2Req = AllocateZeroPool (sizeof (SCSI_BLKIO2_REQUEST));
+ if (BlkIo2Req == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ BlkIo2Req->Token = Token;
+ InsertTailList (&ScsiDiskDevice->BlkIo2Queue, &BlkIo2Req->Link);
+ InitializeListHead (&BlkIo2Req->ScsiRWQueue);
+
+ Status = EFI_SUCCESS;
+
+ BlocksRemaining = NumberOfBlocks;
+ BlockSize = ScsiDiskDevice->BlkIo.Media->BlockSize;
+
+ //
+ // Limit the data bytes that can be transferred by one Read(10) or Read(16)
+ // Command
+ //
+ if (!ScsiDiskDevice->Cdb16Byte) {
+ MaxBlock = 0xFFFF;
+ } else {
+ MaxBlock = 0xFFFFFFFF;
+ }
+
+ PtrBuffer = Buffer;
+
+ while (BlocksRemaining > 0) {
+
+ if (BlocksRemaining <= MaxBlock) {
+ if (!ScsiDiskDevice->Cdb16Byte) {
+ SectorCount = (UINT16) BlocksRemaining;
+ } else {
+ SectorCount = (UINT32) BlocksRemaining;
+ }
+ } else {
+ SectorCount = MaxBlock;
+ }
+
+ ByteCount = SectorCount * BlockSize;
+ //
+ // |------------------------|-----------------|------------------|-----------------|
+ // | ATA Transfer Mode | Transfer Rate | SCSI Interface | Transfer Rate |
+ // |------------------------|-----------------|------------------|-----------------|
+ // | PIO Mode 0 | 3.3Mbytes/sec | SCSI-1 | 5Mbytes/sec |
+ // |------------------------|-----------------|------------------|-----------------|
+ // | PIO Mode 1 | 5.2Mbytes/sec | Fast SCSI | 10Mbytes/sec |
+ // |------------------------|-----------------|------------------|-----------------|
+ // | PIO Mode 2 | 8.3Mbytes/sec | Fast-Wide SCSI | 20Mbytes/sec |
+ // |------------------------|-----------------|------------------|-----------------|
+ // | PIO Mode 3 | 11.1Mbytes/sec | Ultra SCSI | 20Mbytes/sec |
+ // |------------------------|-----------------|------------------|-----------------|
+ // | PIO Mode 4 | 16.6Mbytes/sec | Ultra Wide SCSI | 40Mbytes/sec |
+ // |------------------------|-----------------|------------------|-----------------|
+ // | Single-word DMA Mode 0 | 2.1Mbytes/sec | Ultra2 SCSI | 40Mbytes/sec |
+ // |------------------------|-----------------|------------------|-----------------|
+ // | Single-word DMA Mode 1 | 4.2Mbytes/sec | Ultra2 Wide SCSI | 80Mbytes/sec |
+ // |------------------------|-----------------|------------------|-----------------|
+ // | Single-word DMA Mode 2 | 8.4Mbytes/sec | Ultra3 SCSI | 160Mbytes/sec |
+ // |------------------------|-----------------|------------------|-----------------|
+ // | Multi-word DMA Mode 0 | 4.2Mbytes/sec | Ultra-320 SCSI | 320Mbytes/sec |
+ // |------------------------|-----------------|------------------|-----------------|
+ // | Multi-word DMA Mode 1 | 13.3Mbytes/sec | Ultra-640 SCSI | 640Mbytes/sec |
+ // |------------------------|-----------------|------------------|-----------------|
+ //
+ // As ScsiDisk and ScsiBus driver are used to manage SCSI or ATAPI devices,
+ // we have to use the lowest transfer rate to calculate the possible
+ // maximum timeout value for each operation.
+ // From the above table, we could know 2.1Mbytes per second is lowest one.
+ // The timout value is rounded up to nearest integar and here an additional
+ // 30s is added to follow ATA spec in which it mentioned that the device
+ // may take up to 30s to respond commands in the Standby/Idle mode.
+ //
+ Timeout = EFI_TIMER_PERIOD_SECONDS (ByteCount / 2100000 + 31);
+
+ if (!ScsiDiskDevice->Cdb16Byte) {
+ Status = ScsiDiskAsyncWrite10 (
+ ScsiDiskDevice,
+ Timeout,
+ PtrBuffer,
+ ByteCount,
+ (UINT32) Lba,
+ SectorCount,
+ BlkIo2Req,
+ Token
+ );
+ } else {
+ Status = ScsiDiskAsyncWrite16 (
+ ScsiDiskDevice,
+ Timeout,
+ PtrBuffer,
+ ByteCount,
+ Lba,
+ SectorCount,
+ BlkIo2Req,
+ Token
+ );
+ }
+ if (EFI_ERROR (Status)) {
+ //
+ // Free the SCSI_BLKIO2_REQUEST structure only when the first SCSI
+ // command fails. Otherwise, it will be freed in the callback function
+ // ScsiDiskNotify().
+ //
+ if (IsListEmpty (&BlkIo2Req->ScsiRWQueue)) {
+ RemoveEntryList (&BlkIo2Req->Link);
+ FreePool (BlkIo2Req);
+ }
+ return EFI_DEVICE_ERROR;
+ }
+
+ //
+ // Sectors submitted for transfer
+ //
+ SectorCount = ByteCount / BlockSize;
+
+ Lba += SectorCount;
+ PtrBuffer = PtrBuffer + SectorCount * BlockSize;
+ BlocksRemaining -= SectorCount;
+ }
+
+ return EFI_SUCCESS;
+}
+
/**
Submit Read(10) command.
@@ -2587,6 +3324,689 @@ BackOff:
}
+/**
+ Internal helper notify function in which determine whether retry of a SCSI
+ Read/Write command is needed and signal the event passed from Block I/O(2) if
+ the SCSI I/O operation completes.
+
+ @param Event The instance of EFI_EVENT.
+ @param Context The parameter passed in.
+
+**/
+VOID
+EFIAPI
+ScsiDiskNotify (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ EFI_STATUS Status;
+ SCSI_ASYNC_RW_REQUEST *Request;
+ SCSI_DISK_DEV *ScsiDiskDevice;
+ EFI_BLOCK_IO2_TOKEN *Token;
+ UINTN Action;
+ UINT32 OldDataLength;
+ UINT32 OldSectorCount;
+ UINT8 MaxRetry;
+
+ gBS->CloseEvent (Event);
+
+ Request = (SCSI_ASYNC_RW_REQUEST *) Context;
+ ScsiDiskDevice = Request->ScsiDiskDevice;
+ Token = Request->BlkIo2Req->Token;
+ OldDataLength = Request->DataLength;
+ OldSectorCount = Request->SectorCount;
+ MaxRetry = 2;
+
+ //
+ // If previous sub-tasks already fails, no need to process this sub-task.
+ //
+ if (Token->TransactionStatus != EFI_SUCCESS) {
+ goto Exit;
+ }
+
+ //
+ // Check HostAdapterStatus and TargetStatus
+ // (EFI_TIMEOUT, EFI_DEVICE_ERROR, EFI_WARN_BUFFER_TOO_SMALL)
+ //
+ Status = CheckHostAdapterStatus (Request->HostAdapterStatus);
+ if ((Status == EFI_TIMEOUT) || (Status == EFI_NOT_READY)) {
+ if (++Request->TimesRetry > MaxRetry) {
+ Token->TransactionStatus = EFI_DEVICE_ERROR;
+ goto Exit;
+ } else {
+ goto Retry;
+ }
+ } else if (Status == EFI_DEVICE_ERROR) {
+ //
+ // reset the scsi channel
+ //
+ ScsiDiskDevice->ScsiIo->ResetBus (ScsiDiskDevice->ScsiIo);
+ Token->TransactionStatus = EFI_DEVICE_ERROR;
+ goto Exit;
+ }
+
+ Status = CheckTargetStatus (Request->TargetStatus);
+ if (Status == EFI_NOT_READY) {
+ //
+ // reset the scsi device
+ //
+ ScsiDiskDevice->ScsiIo->ResetDevice (ScsiDiskDevice->ScsiIo);
+ if (++Request->TimesRetry > MaxRetry) {
+ Token->TransactionStatus = EFI_DEVICE_ERROR;
+ goto Exit;
+ } else {
+ goto Retry;
+ }
+ } else if (Status == EFI_DEVICE_ERROR) {
+ Token->TransactionStatus = EFI_DEVICE_ERROR;
+ goto Exit;
+ }
+
+ if (Request->TargetStatus == EFI_EXT_SCSI_STATUS_TARGET_CHECK_CONDITION) {
+ DEBUG ((EFI_D_ERROR, "ScsiDiskNotify: Check Condition happened!\n"));
+
+ Status = DetectMediaParsingSenseKeys (
+ ScsiDiskDevice,
+ Request->SenseData,
+ Request->SenseDataLength / sizeof (EFI_SCSI_SENSE_DATA),
+ &Action
+ );
+ if (Action == ACTION_RETRY_COMMAND_LATER) {
+ if (++Request->TimesRetry > MaxRetry) {
+ Token->TransactionStatus = EFI_DEVICE_ERROR;
+ goto Exit;
+ } else {
+ goto Retry;
+ }
+ } else if (Action == ACTION_RETRY_WITH_BACKOFF_ALGO) {
+ if (Request->SectorCount <= 1) {
+ //
+ // Jump out if the operation still fails with one sector transfer
+ // length.
+ //
+ Token->TransactionStatus = EFI_DEVICE_ERROR;
+ goto Exit;
+ }
+ //
+ // Try again with two half length request if the sense data shows we need
+ // to retry.
+ //
+ Request->SectorCount >>= 1;
+ Request->DataLength = Request->SectorCount * ScsiDiskDevice->BlkIo.Media->BlockSize;
+ Request->TimesRetry = 0;
+
+ goto Retry;
+ } else {
+ Token->TransactionStatus = EFI_DEVICE_ERROR;
+ goto Exit;
+ }
+ }
+
+ //
+ // This sub-task succeeds, no need to retry.
+ //
+ goto Exit;
+
+Retry:
+ if (Request->InBuffer != NULL) {
+ //
+ // SCSI read command
+ //
+ if (!ScsiDiskDevice->Cdb16Byte) {
+ Status = ScsiDiskAsyncRead10 (
+ ScsiDiskDevice,
+ Request->Timeout,
+ Request->InBuffer,
+ Request->DataLength,
+ (UINT32) Request->StartLba,
+ Request->SectorCount,
+ Request->BlkIo2Req,
+ Token
+ );
+ } else {
+ Status = ScsiDiskAsyncRead16 (
+ ScsiDiskDevice,
+ Request->Timeout,
+ Request->InBuffer,
+ Request->DataLength,
+ Request->StartLba,
+ Request->SectorCount,
+ Request->BlkIo2Req,
+ Token
+ );
+ }
+
+ if (EFI_ERROR (Status)) {
+ Token->TransactionStatus = EFI_DEVICE_ERROR;
+ goto Exit;
+ } else if (OldSectorCount != Request->SectorCount) {
+ //
+ // Original sub-task will be split into two new sub-tasks with smaller
+ // DataLength
+ //
+ if (!ScsiDiskDevice->Cdb16Byte) {
+ Status = ScsiDiskAsyncRead10 (
+ ScsiDiskDevice,
+ Request->Timeout,
+ Request->InBuffer + Request->SectorCount * ScsiDiskDevice->BlkIo.Media->BlockSize,
+ OldDataLength - Request->DataLength,
+ (UINT32) Request->StartLba + Request->SectorCount,
+ OldSectorCount - Request->SectorCount,
+ Request->BlkIo2Req,
+ Token
+ );
+ } else {
+ Status = ScsiDiskAsyncRead16 (
+ ScsiDiskDevice,
+ Request->Timeout,
+ Request->InBuffer + Request->SectorCount * ScsiDiskDevice->BlkIo.Media->BlockSize,
+ OldDataLength - Request->DataLength,
+ Request->StartLba + Request->SectorCount,
+ OldSectorCount - Request->SectorCount,
+ Request->BlkIo2Req,
+ Token
+ );
+ }
+ if (EFI_ERROR (Status)) {
+ Token->TransactionStatus = EFI_DEVICE_ERROR;
+ goto Exit;
+ }
+ }
+ } else {
+ //
+ // SCSI write command
+ //
+ if (!ScsiDiskDevice->Cdb16Byte) {
+ Status = ScsiDiskAsyncWrite10 (
+ ScsiDiskDevice,
+ Request->Timeout,
+ Request->OutBuffer,
+ Request->DataLength,
+ (UINT32) Request->StartLba,
+ Request->SectorCount,
+ Request->BlkIo2Req,
+ Token
+ );
+ } else {
+ Status = ScsiDiskAsyncWrite16 (
+ ScsiDiskDevice,
+ Request->Timeout,
+ Request->OutBuffer,
+ Request->DataLength,
+ Request->StartLba,
+ Request->SectorCount,
+ Request->BlkIo2Req,
+ Token
+ );
+ }
+
+ if (EFI_ERROR (Status)) {
+ Token->TransactionStatus = EFI_DEVICE_ERROR;
+ goto Exit;
+ } else if (OldSectorCount != Request->SectorCount) {
+ //
+ // Original sub-task will be split into two new sub-tasks with smaller
+ // DataLength
+ //
+ if (!ScsiDiskDevice->Cdb16Byte) {
+ Status = ScsiDiskAsyncWrite10 (
+ ScsiDiskDevice,
+ Request->Timeout,
+ Request->OutBuffer + Request->SectorCount * ScsiDiskDevice->BlkIo.Media->BlockSize,
+ OldDataLength - Request->DataLength,
+ (UINT32) Request->StartLba + Request->SectorCount,
+ OldSectorCount - Request->SectorCount,
+ Request->BlkIo2Req,
+ Token
+ );
+ } else {
+ Status = ScsiDiskAsyncWrite16 (
+ ScsiDiskDevice,
+ Request->Timeout,
+ Request->OutBuffer + Request->SectorCount * ScsiDiskDevice->BlkIo.Media->BlockSize,
+ OldDataLength - Request->DataLength,
+ Request->StartLba + Request->SectorCount,
+ OldSectorCount - Request->SectorCount,
+ Request->BlkIo2Req,
+ Token
+ );
+ }
+ if (EFI_ERROR (Status)) {
+ Token->TransactionStatus = EFI_DEVICE_ERROR;
+ goto Exit;
+ }
+ }
+ }
+
+Exit:
+ RemoveEntryList (&Request->Link);
+ if (IsListEmpty (&Request->BlkIo2Req->ScsiRWQueue)) {
+ //
+ // The last SCSI R/W command of a BlockIo2 request completes
+ //
+ RemoveEntryList (&Request->BlkIo2Req->Link);
+ FreePool (Request->BlkIo2Req); // Should be freed only once
+ gBS->SignalEvent (Token->Event);
+ }
+
+ FreePool (Request->SenseData);
+ FreePool (Request);
+}
+
+
+/**
+ Submit Async Read(10) command.
+
+ @param ScsiDiskDevice The pointer of ScsiDiskDevice.
+ @param Timeout The time to complete the command.
+ @param DataBuffer The buffer to fill with the read out data.
+ @param DataLength The length of buffer.
+ @param StartLba The start logic block address.
+ @param SectorCount The number of blocks to read.
+ @param BlkIo2Req The upstream BlockIo2 request.
+ @param Token The pointer to the token associated with the
+ non-blocking read request.
+
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a
+ lack of resources.
+ @return others Status returned by calling
+ ScsiRead10CommandEx().
+
+**/
+EFI_STATUS
+ScsiDiskAsyncRead10 (
+ IN SCSI_DISK_DEV *ScsiDiskDevice,
+ IN UINT64 Timeout,
+ OUT UINT8 *DataBuffer,
+ IN UINT32 DataLength,
+ IN UINT32 StartLba,
+ IN UINT32 SectorCount,
+ IN OUT SCSI_BLKIO2_REQUEST *BlkIo2Req,
+ IN EFI_BLOCK_IO2_TOKEN *Token
+ )
+{
+ EFI_STATUS Status;
+ SCSI_ASYNC_RW_REQUEST *Request;
+ EFI_EVENT AsyncIoEvent;
+
+ Request = AllocateZeroPool (sizeof (SCSI_ASYNC_RW_REQUEST));
+ if (Request == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+ InsertTailList (&BlkIo2Req->ScsiRWQueue, &Request->Link);
+
+ Request->SenseDataLength = (UINT8) (6 * sizeof (EFI_SCSI_SENSE_DATA));
+ Request->SenseData = AllocateZeroPool (Request->SenseDataLength);
+ if (Request->SenseData == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto ErrorExit;
+ }
+
+ Request->ScsiDiskDevice = ScsiDiskDevice;
+ Request->Timeout = Timeout;
+ Request->InBuffer = DataBuffer;
+ Request->DataLength = DataLength;
+ Request->StartLba = StartLba;
+ Request->SectorCount = SectorCount;
+ Request->BlkIo2Req = BlkIo2Req;
+
+ //
+ // Create Event
+ //
+ Status = gBS->CreateEvent (
+ EVT_NOTIFY_SIGNAL,
+ TPL_CALLBACK,
+ ScsiDiskNotify,
+ Request,
+ &AsyncIoEvent
+ );
+ if (EFI_ERROR(Status)) {
+ goto ErrorExit;
+ }
+
+ Status = ScsiRead10CommandEx (
+ ScsiDiskDevice->ScsiIo,
+ Request->Timeout,
+ Request->SenseData,
+ &Request->SenseDataLength,
+ &Request->HostAdapterStatus,
+ &Request->TargetStatus,
+ Request->InBuffer,
+ &Request->DataLength,
+ (UINT32) Request->StartLba,
+ Request->SectorCount,
+ AsyncIoEvent
+ );
+ if (EFI_ERROR(Status)) {
+ goto ErrorExit;
+ }
+
+ return EFI_SUCCESS;
+
+ErrorExit:
+ if (Request != NULL) {
+ if (Request->SenseData != NULL) {
+ FreePool (Request->SenseData);
+ }
+
+ RemoveEntryList (&Request->Link);
+ FreePool (Request);
+ }
+
+ return Status;
+}
+
+
+/**
+ Submit Async Write(10) command.
+
+ @param ScsiDiskDevice The pointer of ScsiDiskDevice.
+ @param Timeout The time to complete the command.
+ @param DataBuffer The buffer contains the data to write.
+ @param DataLength The length of buffer.
+ @param StartLba The start logic block address.
+ @param SectorCount The number of blocks to write.
+ @param BlkIo2Req The upstream BlockIo2 request.
+ @param Token The pointer to the token associated with the
+ non-blocking read request.
+
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a
+ lack of resources.
+ @return others Status returned by calling
+ ScsiWrite10CommandEx().
+
+**/
+EFI_STATUS
+ScsiDiskAsyncWrite10 (
+ IN SCSI_DISK_DEV *ScsiDiskDevice,
+ IN UINT64 Timeout,
+ IN UINT8 *DataBuffer,
+ IN UINT32 DataLength,
+ IN UINT32 StartLba,
+ IN UINT32 SectorCount,
+ IN OUT SCSI_BLKIO2_REQUEST *BlkIo2Req,
+ IN EFI_BLOCK_IO2_TOKEN *Token
+ )
+{
+ EFI_STATUS Status;
+ SCSI_ASYNC_RW_REQUEST *Request;
+ EFI_EVENT AsyncIoEvent;
+
+ Request = AllocateZeroPool (sizeof (SCSI_ASYNC_RW_REQUEST));
+ if (Request == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+ InsertTailList (&BlkIo2Req->ScsiRWQueue, &Request->Link);
+
+ Request->SenseDataLength = (UINT8) (6 * sizeof (EFI_SCSI_SENSE_DATA));
+ Request->SenseData = AllocateZeroPool (Request->SenseDataLength);
+ if (Request->SenseData == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto ErrorExit;
+ }
+
+ Request->ScsiDiskDevice = ScsiDiskDevice;
+ Request->Timeout = Timeout;
+ Request->OutBuffer = DataBuffer;
+ Request->DataLength = DataLength;
+ Request->StartLba = StartLba;
+ Request->SectorCount = SectorCount;
+ Request->BlkIo2Req = BlkIo2Req;
+
+ //
+ // Create Event
+ //
+ Status = gBS->CreateEvent (
+ EVT_NOTIFY_SIGNAL,
+ TPL_CALLBACK,
+ ScsiDiskNotify,
+ Request,
+ &AsyncIoEvent
+ );
+ if (EFI_ERROR(Status)) {
+ goto ErrorExit;
+ }
+
+ Status = ScsiWrite10CommandEx (
+ ScsiDiskDevice->ScsiIo,
+ Request->Timeout,
+ Request->SenseData,
+ &Request->SenseDataLength,
+ &Request->HostAdapterStatus,
+ &Request->TargetStatus,
+ Request->OutBuffer,
+ &Request->DataLength,
+ (UINT32) Request->StartLba,
+ Request->SectorCount,
+ AsyncIoEvent
+ );
+ if (EFI_ERROR(Status)) {
+ goto ErrorExit;
+ }
+
+ return EFI_SUCCESS;
+
+ErrorExit:
+ if (Request != NULL) {
+ if (Request->SenseData != NULL) {
+ FreePool (Request->SenseData);
+ }
+
+ RemoveEntryList (&Request->Link);
+ FreePool (Request);
+ }
+
+ return Status;
+}
+
+
+/**
+ Submit Async Read(16) command.
+
+ @param ScsiDiskDevice The pointer of ScsiDiskDevice.
+ @param Timeout The time to complete the command.
+ @param DataBuffer The buffer to fill with the read out data.
+ @param DataLength The length of buffer.
+ @param StartLba The start logic block address.
+ @param SectorCount The number of blocks to read.
+ @param BlkIo2Req The upstream BlockIo2 request.
+ @param Token The pointer to the token associated with the
+ non-blocking read request.
+
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a
+ lack of resources.
+ @return others Status returned by calling
+ ScsiRead16CommandEx().
+
+**/
+EFI_STATUS
+ScsiDiskAsyncRead16 (
+ IN SCSI_DISK_DEV *ScsiDiskDevice,
+ IN UINT64 Timeout,
+ OUT UINT8 *DataBuffer,
+ IN UINT32 DataLength,
+ IN UINT64 StartLba,
+ IN UINT32 SectorCount,
+ IN OUT SCSI_BLKIO2_REQUEST *BlkIo2Req,
+ IN EFI_BLOCK_IO2_TOKEN *Token
+ )
+{
+ EFI_STATUS Status;
+ SCSI_ASYNC_RW_REQUEST *Request;
+ EFI_EVENT AsyncIoEvent;
+
+ Request = AllocateZeroPool (sizeof (SCSI_ASYNC_RW_REQUEST));
+ if (Request == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+ InsertTailList (&BlkIo2Req->ScsiRWQueue, &Request->Link);
+
+ Request->SenseDataLength = (UINT8) (6 * sizeof (EFI_SCSI_SENSE_DATA));
+ Request->SenseData = AllocateZeroPool (Request->SenseDataLength);
+ if (Request->SenseData == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto ErrorExit;
+ }
+
+ Request->ScsiDiskDevice = ScsiDiskDevice;
+ Request->Timeout = Timeout;
+ Request->InBuffer = DataBuffer;
+ Request->DataLength = DataLength;
+ Request->StartLba = StartLba;
+ Request->SectorCount = SectorCount;
+ Request->BlkIo2Req = BlkIo2Req;
+
+ //
+ // Create Event
+ //
+ Status = gBS->CreateEvent (
+ EVT_NOTIFY_SIGNAL,
+ TPL_CALLBACK,
+ ScsiDiskNotify,
+ Request,
+ &AsyncIoEvent
+ );
+ if (EFI_ERROR(Status)) {
+ goto ErrorExit;
+ }
+
+ Status = ScsiRead16CommandEx (
+ ScsiDiskDevice->ScsiIo,
+ Request->Timeout,
+ Request->SenseData,
+ &Request->SenseDataLength,
+ &Request->HostAdapterStatus,
+ &Request->TargetStatus,
+ Request->InBuffer,
+ &Request->DataLength,
+ Request->StartLba,
+ Request->SectorCount,
+ AsyncIoEvent
+ );
+ if (EFI_ERROR(Status)) {
+ goto ErrorExit;
+ }
+
+ return EFI_SUCCESS;
+
+ErrorExit:
+ if (Request != NULL) {
+ if (Request->SenseData != NULL) {
+ FreePool (Request->SenseData);
+ }
+
+ RemoveEntryList (&Request->Link);
+ FreePool (Request);
+ }
+
+ return Status;
+}
+
+
+/**
+ Submit Async Write(16) command.
+
+ @param ScsiDiskDevice The pointer of ScsiDiskDevice.
+ @param Timeout The time to complete the command.
+ @param DataBuffer The buffer contains the data to write.
+ @param DataLength The length of buffer.
+ @param StartLba The start logic block address.
+ @param SectorCount The number of blocks to write.
+ @param BlkIo2Req The upstream BlockIo2 request.
+ @param Token The pointer to the token associated with the
+ non-blocking read request.
+
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a
+ lack of resources.
+ @return others Status returned by calling
+ ScsiWrite16CommandEx().
+
+**/
+EFI_STATUS
+ScsiDiskAsyncWrite16 (
+ IN SCSI_DISK_DEV *ScsiDiskDevice,
+ IN UINT64 Timeout,
+ IN UINT8 *DataBuffer,
+ IN UINT32 DataLength,
+ IN UINT64 StartLba,
+ IN UINT32 SectorCount,
+ IN OUT SCSI_BLKIO2_REQUEST *BlkIo2Req,
+ IN EFI_BLOCK_IO2_TOKEN *Token
+ )
+{
+ EFI_STATUS Status;
+ SCSI_ASYNC_RW_REQUEST *Request;
+ EFI_EVENT AsyncIoEvent;
+
+ Request = AllocateZeroPool (sizeof (SCSI_ASYNC_RW_REQUEST));
+ if (Request == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+ InsertTailList (&BlkIo2Req->ScsiRWQueue, &Request->Link);
+
+ Request->SenseDataLength = (UINT8) (6 * sizeof (EFI_SCSI_SENSE_DATA));
+ Request->SenseData = AllocateZeroPool (Request->SenseDataLength);
+ if (Request->SenseData == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto ErrorExit;
+ }
+
+ Request->ScsiDiskDevice = ScsiDiskDevice;
+ Request->Timeout = Timeout;
+ Request->OutBuffer = DataBuffer;
+ Request->DataLength = DataLength;
+ Request->StartLba = StartLba;
+ Request->SectorCount = SectorCount;
+ Request->BlkIo2Req = BlkIo2Req;
+
+ //
+ // Create Event
+ //
+ Status = gBS->CreateEvent (
+ EVT_NOTIFY_SIGNAL,
+ TPL_CALLBACK,
+ ScsiDiskNotify,
+ Request,
+ &AsyncIoEvent
+ );
+ if (EFI_ERROR(Status)) {
+ goto ErrorExit;
+ }
+
+ Status = ScsiWrite16CommandEx (
+ ScsiDiskDevice->ScsiIo,
+ Request->Timeout,
+ Request->SenseData,
+ &Request->SenseDataLength,
+ &Request->HostAdapterStatus,
+ &Request->TargetStatus,
+ Request->OutBuffer,
+ &Request->DataLength,
+ Request->StartLba,
+ Request->SectorCount,
+ AsyncIoEvent
+ );
+ if (EFI_ERROR(Status)) {
+ goto ErrorExit;
+ }
+
+ return EFI_SUCCESS;
+
+ErrorExit:
+ if (Request != NULL) {
+ if (Request->SenseData != NULL) {
+ FreePool (Request->SenseData);
+ }
+
+ RemoveEntryList (&Request->Link);
+ FreePool (Request);
+ }
+
+ return Status;
+}
+
+
/**
Check sense key to find if media presents.
@@ -2973,13 +4393,13 @@ ReleaseScsiDiskDeviceResources (
}
/**
- Determine if Block Io should be produced.
+ Determine if Block Io & Block Io2 should be produced.
@param ChildHandle Child Handle to retrieve Parent information.
- @retval TRUE Should produce Block Io.
- @retval FALSE Should not produce Block Io.
+ @retval TRUE Should produce Block Io & Block Io2.
+ @retval FALSE Should not produce Block Io & Block Io2.
**/
BOOLEAN
diff --git a/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.h b/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.h
index 407763665f..836e7caeed 100644
--- a/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.h
+++ b/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.h
@@ -1,7 +1,7 @@
/** @file
Header file for SCSI Disk Driver.
-Copyright (c) 2004 - 2014, Intel Corporation. All rights reserved.
+Copyright (c) 2004 - 2015, 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
@@ -22,6 +22,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#include
#include
#include
+#include
#include
#include
#include
@@ -50,6 +51,7 @@ typedef struct {
EFI_HANDLE Handle;
EFI_BLOCK_IO_PROTOCOL BlkIo;
+ EFI_BLOCK_IO2_PROTOCOL BlkIo2;
EFI_BLOCK_IO_MEDIA BlkIoMedia;
EFI_SCSI_IO_PROTOCOL *ScsiIo;
UINT8 DeviceType;
@@ -75,12 +77,59 @@ typedef struct {
// The flag indicates if 16-byte command can be used
//
BOOLEAN Cdb16Byte;
+
+ //
+ // The queue for BlockIo2 requests
+ //
+ LIST_ENTRY BlkIo2Queue;
} SCSI_DISK_DEV;
-#define SCSI_DISK_DEV_FROM_THIS(a) CR (a, SCSI_DISK_DEV, BlkIo, SCSI_DISK_DEV_SIGNATURE)
+#define SCSI_DISK_DEV_FROM_BLKIO(a) CR (a, SCSI_DISK_DEV, BlkIo, SCSI_DISK_DEV_SIGNATURE)
+#define SCSI_DISK_DEV_FROM_BLKIO2(a) CR (a, SCSI_DISK_DEV, BlkIo2, SCSI_DISK_DEV_SIGNATURE)
#define SCSI_DISK_DEV_FROM_DISKINFO(a) CR (a, SCSI_DISK_DEV, DiskInfo, SCSI_DISK_DEV_SIGNATURE)
+//
+// Asynchronous I/O request
+//
+//
+// Private data structure for a BlockIo2 request
+//
+typedef struct {
+ EFI_BLOCK_IO2_TOKEN *Token;
+ //
+ // The queue for Scsi Read/Write requests of a BlockIo2
+ //
+ LIST_ENTRY ScsiRWQueue;
+
+ LIST_ENTRY Link;
+} SCSI_BLKIO2_REQUEST;
+
+//
+// Private data structure for a SCSI Read/Write request
+//
+typedef struct {
+ SCSI_DISK_DEV *ScsiDiskDevice;
+ UINT64 Timeout;
+ EFI_SCSI_SENSE_DATA *SenseData;
+ UINT8 SenseDataLength;
+ UINT8 HostAdapterStatus;
+ UINT8 TargetStatus;
+ UINT8 *InBuffer;
+ UINT8 *OutBuffer;
+ UINT32 DataLength;
+ UINT64 StartLba;
+ UINT32 SectorCount;
+ UINT8 TimesRetry;
+
+ //
+ // The BlockIo2 request this SCSI command belongs to
+ //
+ SCSI_BLKIO2_REQUEST *BlkIo2Req;
+
+ LIST_ENTRY Link;
+} SCSI_ASYNC_RW_REQUEST;
+
//
// Global Variables
//
@@ -410,6 +459,116 @@ ScsiDiskFlushBlocks (
);
+/**
+ Reset SCSI Disk.
+
+ @param This The pointer of EFI_BLOCK_IO2_PROTOCOL.
+ @param ExtendedVerification The flag about if extend verificate.
+
+ @retval EFI_SUCCESS The device was reset.
+ @retval EFI_DEVICE_ERROR The device is not functioning properly and could
+ not be reset.
+ @return EFI_STATUS is returned from EFI_SCSI_IO_PROTOCOL.ResetDevice().
+
+**/
+EFI_STATUS
+EFIAPI
+ScsiDiskResetEx (
+ IN EFI_BLOCK_IO2_PROTOCOL *This,
+ IN BOOLEAN ExtendedVerification
+ );
+
+/**
+ The function is to Read Block from SCSI Disk.
+
+ @param This The pointer of EFI_BLOCK_IO_PROTOCOL.
+ @param MediaId The Id of Media detected.
+ @param Lba The logic block address.
+ @param Token A pointer to the token associated with the transaction.
+ @param BufferSize The size of Buffer.
+ @param Buffer The buffer to fill the read out data.
+
+ @retval EFI_SUCCESS The read request was queued if Token-> Event is
+ not NULL. The data was read correctly from the
+ device if theToken-> Event is NULL.
+ @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.
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a
+ lack of resources.
+
+**/
+EFI_STATUS
+EFIAPI
+ScsiDiskReadBlocksEx (
+ 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
+ );
+
+/**
+ The function is to Write Block to SCSI Disk.
+
+ @param This The pointer of EFI_BLOCK_IO_PROTOCOL.
+ @param MediaId The Id of Media detected.
+ @param Lba The logic block address.
+ @param Token A pointer to the token associated with the transaction.
+ @param BufferSize The size of Buffer.
+ @param Buffer The buffer to fill the read out 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
+ScsiDiskWriteBlocksEx (
+ 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
+ );
+
+/**
+ Flush the Block Device.
+
+ @param This Indicates a pointer to the calling context.
+ @param Token A pointer to the token associated with the transaction.
+
+ @retval EFI_SUCCESS All outstanding data was written to the device.
+ @retval EFI_DEVICE_ERROR The device reported an error while writing back the
+ data.
+ @retval EFI_NO_MEDIA There is no media in the device.
+
+**/
+EFI_STATUS
+EFIAPI
+ScsiDiskFlushBlocksEx (
+ IN EFI_BLOCK_IO2_PROTOCOL *This,
+ IN OUT EFI_BLOCK_IO2_TOKEN *Token
+ );
+
+
/**
Provides inquiry information for the controller type.
@@ -717,6 +876,54 @@ ScsiDiskWriteSectors (
IN UINTN NumberOfBlocks
);
+/**
+ Asynchronously read sector from SCSI Disk.
+
+ @param ScsiDiskDevice The pointer of SCSI_DISK_DEV.
+ @param Buffer The buffer to fill in the read out data.
+ @param Lba Logic block address.
+ @param NumberOfBlocks The number of blocks to read.
+ @param Token A pointer to the token associated with the
+ non-blocking read request.
+
+ @retval EFI_INVALID_PARAMETER Token is NULL or Token->Event is NULL.
+ @retval EFI_DEVICE_ERROR Indicates a device error.
+ @retval EFI_SUCCESS Operation is successful.
+
+**/
+EFI_STATUS
+ScsiDiskAsyncReadSectors (
+ IN SCSI_DISK_DEV *ScsiDiskDevice,
+ OUT VOID *Buffer,
+ IN EFI_LBA Lba,
+ IN UINTN NumberOfBlocks,
+ IN EFI_BLOCK_IO2_TOKEN *Token
+ );
+
+/**
+ Asynchronously write sector to SCSI Disk.
+
+ @param ScsiDiskDevice The pointer of SCSI_DISK_DEV.
+ @param Buffer The buffer of data to be written into SCSI Disk.
+ @param Lba Logic block address.
+ @param NumberOfBlocks The number of blocks to read.
+ @param Token A pointer to the token associated with the
+ non-blocking read request.
+
+ @retval EFI_INVALID_PARAMETER Token is NULL or Token->Event is NULL
+ @retval EFI_DEVICE_ERROR Indicates a device error.
+ @retval EFI_SUCCESS Operation is successful.
+
+**/
+EFI_STATUS
+ScsiDiskAsyncWriteSectors (
+ IN SCSI_DISK_DEV *ScsiDiskDevice,
+ IN VOID *Buffer,
+ IN EFI_LBA Lba,
+ IN UINTN NumberOfBlocks,
+ IN EFI_BLOCK_IO2_TOKEN *Token
+ );
+
/**
Submit Read(10) command.
@@ -815,6 +1022,130 @@ ScsiDiskWrite16 (
IN UINT32 SectorCount
);
+/**
+ Submit Async Read(10) command.
+
+ @param ScsiDiskDevice The pointer of ScsiDiskDevice.
+ @param Timeout The time to complete the command.
+ @param DataBuffer The buffer to fill with the read out data.
+ @param DataLength The length of buffer.
+ @param StartLba The start logic block address.
+ @param SectorCount The number of blocks to read.
+ @param BlkIo2Req The upstream BlockIo2 request.
+ @param Token The pointer to the token associated with the
+ non-blocking read request.
+
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a
+ lack of resources.
+ @return others Status returned by calling
+ ScsiRead10CommandEx().
+
+**/
+EFI_STATUS
+ScsiDiskAsyncRead10 (
+ IN SCSI_DISK_DEV *ScsiDiskDevice,
+ IN UINT64 Timeout,
+ OUT UINT8 *DataBuffer,
+ IN UINT32 DataLength,
+ IN UINT32 StartLba,
+ IN UINT32 SectorCount,
+ IN OUT SCSI_BLKIO2_REQUEST *BlkIo2Req,
+ IN EFI_BLOCK_IO2_TOKEN *Token
+ );
+
+/**
+ Submit Async Write(10) command.
+
+ @param ScsiDiskDevice The pointer of ScsiDiskDevice.
+ @param Timeout The time to complete the command.
+ @param DataBuffer The buffer contains the data to write.
+ @param DataLength The length of buffer.
+ @param StartLba The start logic block address.
+ @param SectorCount The number of blocks to write.
+ @param BlkIo2Req The upstream BlockIo2 request.
+ @param Token The pointer to the token associated with the
+ non-blocking read request.
+
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a
+ lack of resources.
+ @return others Status returned by calling
+ ScsiWrite10CommandEx().
+
+**/
+EFI_STATUS
+ScsiDiskAsyncWrite10 (
+ IN SCSI_DISK_DEV *ScsiDiskDevice,
+ IN UINT64 Timeout,
+ IN UINT8 *DataBuffer,
+ IN UINT32 DataLength,
+ IN UINT32 StartLba,
+ IN UINT32 SectorCount,
+ IN OUT SCSI_BLKIO2_REQUEST *BlkIo2Req,
+ IN EFI_BLOCK_IO2_TOKEN *Token
+ );
+
+/**
+ Submit Async Read(16) command.
+
+ @param ScsiDiskDevice The pointer of ScsiDiskDevice.
+ @param Timeout The time to complete the command.
+ @param DataBuffer The buffer to fill with the read out data.
+ @param DataLength The length of buffer.
+ @param StartLba The start logic block address.
+ @param SectorCount The number of blocks to read.
+ @param BlkIo2Req The upstream BlockIo2 request.
+ @param Token The pointer to the token associated with the
+ non-blocking read request.
+
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a
+ lack of resources.
+ @return others Status returned by calling
+ ScsiRead16CommandEx().
+
+**/
+EFI_STATUS
+ScsiDiskAsyncRead16 (
+ IN SCSI_DISK_DEV *ScsiDiskDevice,
+ IN UINT64 Timeout,
+ OUT UINT8 *DataBuffer,
+ IN UINT32 DataLength,
+ IN UINT64 StartLba,
+ IN UINT32 SectorCount,
+ IN OUT SCSI_BLKIO2_REQUEST *BlkIo2Req,
+ IN EFI_BLOCK_IO2_TOKEN *Token
+ );
+
+/**
+ Submit Async Write(16) command.
+
+ @param ScsiDiskDevice The pointer of ScsiDiskDevice.
+ @param Timeout The time to complete the command.
+ @param DataBuffer The buffer contains the data to write.
+ @param DataLength The length of buffer.
+ @param StartLba The start logic block address.
+ @param SectorCount The number of blocks to write.
+ @param BlkIo2Req The upstream BlockIo2 request.
+ @param Token The pointer to the token associated with the
+ non-blocking read request.
+
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a
+ lack of resources.
+ @return others Status returned by calling
+ ScsiWrite16CommandEx().
+
+**/
+EFI_STATUS
+ScsiDiskAsyncWrite16 (
+ IN SCSI_DISK_DEV *ScsiDiskDevice,
+ IN UINT64 Timeout,
+ IN UINT8 *DataBuffer,
+ IN UINT32 DataLength,
+ IN UINT64 StartLba,
+ IN UINT32 SectorCount,
+ IN OUT SCSI_BLKIO2_REQUEST *BlkIo2Req,
+ IN EFI_BLOCK_IO2_TOKEN *Token
+ );
+
/**
Get information from media read capacity command.
diff --git a/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDiskDxe.inf b/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDiskDxe.inf
index ec96aa6f92..47539e55c8 100644
--- a/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDiskDxe.inf
+++ b/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDiskDxe.inf
@@ -1,8 +1,9 @@
## @file
# The Scsi Disk driver is used to retrieve the media info in the attached SCSI disk.
-# It detects the SCSI disk media and installs Block I/O Protocol on the device handle.
+# It detects the SCSI disk media and installs Block I/O and Block I/O2 Protocol on
+# the device handle.
#
-# Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.
+# Copyright (c) 2006 - 2015, 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
@@ -55,6 +56,7 @@
[Protocols]
gEfiDiskInfoProtocolGuid ## BY_START
gEfiBlockIoProtocolGuid ## BY_START
+ gEfiBlockIo2ProtocolGuid ## BY_START
gEfiScsiIoProtocolGuid ## TO_START
gEfiScsiPassThruProtocolGuid ## TO_START
gEfiExtScsiPassThruProtocolGuid ## TO_START