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audk/EdkModulePkg/Bus/Scsi/ScsiBus/Dxe/ScsiBus.c

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/*++
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:
scsibus.c
Abstract:
Revision History
--*/
#include "ScsiBus.h"
EFI_DRIVER_BINDING_PROTOCOL gSCSIBusDriverBinding = {
SCSIBusDriverBindingSupported,
SCSIBusDriverBindingStart,
SCSIBusDriverBindingStop,
0xa,
NULL,
NULL
};
EFI_STATUS
EFIAPI
SCSIBusDriverBindingSupported (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
/*++
Routine Description:
Arguments:
Returns:
--*/
// TODO: This - add argument and description to function comment
// TODO: Controller - add argument and description to function comment
// TODO: RemainingDevicePath - add argument and description to function comment
// TODO: EFI_UNSUPPORTED - add return value to function comment
// TODO: EFI_UNSUPPORTED - add return value to function comment
// TODO: EFI_SUCCESS - add return value to function comment
{
EFI_STATUS Status;
//
// If RemainingDevicePath is not NULL, it should verify that the first device
// path node in RemainingDevicePath is an ATAPI Device path node.
//
if (RemainingDevicePath != NULL) {
if ((RemainingDevicePath->Type != MESSAGING_DEVICE_PATH) ||
(RemainingDevicePath->SubType != MSG_ATAPI_DP) ||
(DevicePathNodeLength (RemainingDevicePath) != sizeof(ATAPI_DEVICE_PATH))) {
return EFI_UNSUPPORTED;
}
}
//
// check for the existence of SCSI Pass Thru Protocol
//
Status = gBS->OpenProtocol (
Controller,
&gEfiScsiPassThruProtocolGuid,
NULL,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_TEST_PROTOCOL
);
if (EFI_ERROR (Status) && (Status != EFI_ALREADY_STARTED)) {
return EFI_UNSUPPORTED;
}
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
SCSIBusDriverBindingStart (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
/*++
Routine Description:
Arguments:
Returns:
--*/
// TODO: This - add argument and description to function comment
// TODO: Controller - add argument and description to function comment
// TODO: RemainingDevicePath - add argument and description to function comment
{
EFI_STATUS Status;
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
EFI_SCSI_PASS_THRU_PROTOCOL *ScsiPassThru;
UINT32 StartPun;
UINT64 StartLun;
UINT32 Pun;
UINT64 Lun;
BOOLEAN ScanOtherPuns;
StartPun = 0;
StartLun = 0;
Status = gBS->OpenProtocol (
Controller,
&gEfiDevicePathProtocolGuid,
(VOID **) &ParentDevicePath,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {
return Status;
}
//
// Consume SCSI Pass Thru protocol.
//
Status = gBS->OpenProtocol (
Controller,
&gEfiScsiPassThruProtocolGuid,
(VOID **) &ScsiPassThru,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {
gBS->CloseProtocol (
Controller,
&gEfiDevicePathProtocolGuid,
This->DriverBindingHandle,
Controller
);
return Status;
}
if (RemainingDevicePath == NULL) {
StartPun = 0xFFFFFFFF;
StartLun = 0;
} else {
ScsiPassThru->GetTargetLun (ScsiPassThru, RemainingDevicePath, &StartPun, &StartLun);
}
for (Pun = StartPun, ScanOtherPuns = TRUE; ScanOtherPuns;) {
if (StartPun == 0xFFFFFFFF) {
//
// Remaining Device Path is NULL, scan all the possible Puns in the
// SCSI Channel.
//
Status = ScsiPassThru->GetNextDevice (ScsiPassThru, &Pun, &Lun);
if (EFI_ERROR (Status)) {
//
// no legal Pun and Lun found any more
//
break;
}
} else {
//
// Remaining Device Path is not NULL, only scan the specified Pun.
//
Pun = StartPun;
Lun = StartLun;
ScanOtherPuns = FALSE;
}
//
// Avoid creating handle for the host adapter.
//
if (Pun == ScsiPassThru->Mode->AdapterId) {
continue;
}
//
// Scan for the scsi device, if it attaches to the scsi bus,
// then create handle and install scsi i/o protocol.
//
Status = ScsiScanCreateDevice (This, Controller, Pun, Lun, ScsiPassThru, ParentDevicePath);
}
return Status;
}
EFI_STATUS
EFIAPI
SCSIBusDriverBindingStop (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer
)
/*++
Routine Description:
Arguments:
Returns:
--*/
// TODO: This - add argument and description to function comment
// TODO: Controller - add argument and description to function comment
// TODO: NumberOfChildren - add argument and description to function comment
// TODO: ChildHandleBuffer - add argument and description to function comment
// TODO: EFI_SUCCESS - add return value to function comment
// TODO: EFI_DEVICE_ERROR - add return value to function comment
// TODO: EFI_SUCCESS - add return value to function comment
{
EFI_STATUS Status;
BOOLEAN AllChildrenStopped;
UINTN Index;
EFI_SCSI_IO_PROTOCOL *ScsiIo;
SCSI_IO_DEV *ScsiIoDevice;
EFI_SCSI_PASS_THRU_PROTOCOL *ScsiPassThru;
if (NumberOfChildren == 0) {
//
// Close the bus driver
//
gBS->CloseProtocol (
Controller,
&gEfiScsiPassThruProtocolGuid,
This->DriverBindingHandle,
Controller
);
gBS->CloseProtocol (
Controller,
&gEfiDevicePathProtocolGuid,
This->DriverBindingHandle,
Controller
);
return EFI_SUCCESS;
}
AllChildrenStopped = TRUE;
for (Index = 0; Index < NumberOfChildren; Index++) {
Status = gBS->OpenProtocol (
ChildHandleBuffer[Index],
&gEfiScsiIoProtocolGuid,
(VOID **) &ScsiIo,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
AllChildrenStopped = FALSE;
continue;
}
ScsiIoDevice = SCSI_IO_DEV_FROM_THIS (ScsiIo);
//
// Close the child handle
//
Status = gBS->CloseProtocol (
Controller,
&gEfiScsiPassThruProtocolGuid,
This->DriverBindingHandle,
ChildHandleBuffer[Index]
);
Status = gBS->UninstallMultipleProtocolInterfaces (
ChildHandleBuffer[Index],
&gEfiDevicePathProtocolGuid,
ScsiIoDevice->DevicePath,
&gEfiScsiIoProtocolGuid,
&ScsiIoDevice->ScsiIo,
NULL
);
if (EFI_ERROR (Status)) {
AllChildrenStopped = FALSE;
gBS->OpenProtocol (
Controller,
&gEfiScsiPassThruProtocolGuid,
(VOID **) &ScsiPassThru,
This->DriverBindingHandle,
ChildHandleBuffer[Index],
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
);
} else {
gBS->FreePool (ScsiIoDevice);
}
}
if (!AllChildrenStopped) {
return EFI_DEVICE_ERROR;
}
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
ScsiGetDeviceType (
IN EFI_SCSI_IO_PROTOCOL *This,
OUT UINT8 *DeviceType
)
/*++
Routine Description:
Retrieves the device type information of the SCSI Controller.
Arguments:
This - Protocol instance pointer.
DeviceType - A pointer to the device type information
retrieved from the SCSI Controller.
Returns:
EFI_SUCCESS - Retrieves the device type information successfully.
EFI_INVALID_PARAMETER - The DeviceType is NULL.
--*/
{
SCSI_IO_DEV *ScsiIoDevice;
if (DeviceType == NULL) {
return EFI_INVALID_PARAMETER;
}
ScsiIoDevice = SCSI_IO_DEV_FROM_THIS (This);
*DeviceType = ScsiIoDevice->ScsiDeviceType;
return EFI_SUCCESS;
}
STATIC
EFI_STATUS
EFIAPI
ScsiGetDeviceLocation (
IN EFI_SCSI_IO_PROTOCOL *This,
OUT UINT32 *Target,
OUT UINT64 *Lun
)
/*++
Routine Description:
Retrieves the device location in the SCSI channel.
Arguments:
This - Protocol instance pointer.
Target - A pointer to the Target ID of a SCSI device
on the SCSI channel.
Lun - A pointer to the LUN of the SCSI device on
the SCSI channel.
Returns:
EFI_SUCCESS - Retrieves the device location successfully.
EFI_INVALID_PARAMETER - The Target or Lun is NULL.
--*/
{
SCSI_IO_DEV *ScsiIoDevice;
if (Target == NULL || Lun == NULL) {
return EFI_INVALID_PARAMETER;
}
ScsiIoDevice = SCSI_IO_DEV_FROM_THIS (This);
*Target = ScsiIoDevice->Pun;
*Lun = ScsiIoDevice->Lun;
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
ScsiResetBus (
IN EFI_SCSI_IO_PROTOCOL *This
)
/*++
Routine Description:
Resets the SCSI Bus that the SCSI Controller is attached to.
Arguments:
This - Protocol instance pointer.
Returns:
EFI_SUCCESS - The SCSI bus is reset successfully.
EFI_DEVICE_ERROR - Errors encountered when resetting the SCSI bus.
EFI_UNSUPPORTED - The bus reset operation is not supported by the
SCSI Host Controller.
EFI_TIMEOUT - A timeout occurred while attempting to reset
the SCSI bus.
--*/
{
SCSI_IO_DEV *ScsiIoDevice;
ScsiIoDevice = SCSI_IO_DEV_FROM_THIS (This);
return ScsiIoDevice->ScsiPassThru->ResetChannel (ScsiIoDevice->ScsiPassThru);
}
EFI_STATUS
EFIAPI
ScsiResetDevice (
IN EFI_SCSI_IO_PROTOCOL *This
)
/*++
Routine Description:
Resets the SCSI Controller that the device handle specifies.
Arguments:
This - Protocol instance pointer.
Returns:
EFI_SUCCESS - Reset the SCSI controller successfully.
EFI_DEVICE_ERROR - Errors are encountered when resetting the
SCSI Controller.
EFI_UNSUPPORTED - The SCSI bus does not support a device
reset operation.
EFI_TIMEOUT - A timeout occurred while attempting to
reset the SCSI Controller.
--*/
{
SCSI_IO_DEV *ScsiIoDevice;
ScsiIoDevice = SCSI_IO_DEV_FROM_THIS (This);
return ScsiIoDevice->ScsiPassThru->ResetTarget (
ScsiIoDevice->ScsiPassThru,
ScsiIoDevice->Pun,
ScsiIoDevice->Lun
);
}
EFI_STATUS
EFIAPI
ScsiExecuteSCSICommand (
IN EFI_SCSI_IO_PROTOCOL *This,
IN OUT EFI_SCSI_IO_SCSI_REQUEST_PACKET *Packet,
IN EFI_EVENT Event OPTIONAL
)
/*++
Routine Description:
Sends a SCSI Request Packet to the SCSI Controller for execution.
Arguments:
This - Protocol instance pointer.
Packet - The SCSI request packet to send to the SCSI
Controller specified by the device handle.
Event - If the SCSI bus where the SCSI device is attached
does not support non-blocking I/O, then Event is
ignored, and blocking I/O is performed.
If Event is NULL, then blocking I/O is performed.
If Event is not NULL and non-blocking I/O is
supported, then non-blocking I/O is performed,
and Event will be signaled when the SCSI Request
Packet completes.
Returns:
EFI_SUCCESS - The SCSI Request Packet was sent by the host
successfully, and TransferLength bytes were
transferred to/from DataBuffer.See
HostAdapterStatus, TargetStatus,
SenseDataLength, and SenseData in that order
for additional status information.
EFI_WARN_BUFFER_TOO_SMALL - The SCSI Request Packet was executed,
but the entire DataBuffer could not be transferred.
The actual number of bytes transferred is returned
in TransferLength. See HostAdapterStatus,
TargetStatus, SenseDataLength, and SenseData in
that order for additional status information.
EFI_NOT_READY - The SCSI Request Packet could not be sent because
there are too many SCSI Command Packets already
queued.The caller may retry again later.
EFI_DEVICE_ERROR - A device error occurred while attempting to send
the SCSI Request Packet. See HostAdapterStatus,
TargetStatus, SenseDataLength, and SenseData in
that order for additional status information.
EFI_INVALID_PARAMETER - The contents of CommandPacket are invalid.
The SCSI Request Packet was not sent, so no
additional status information is available.
EFI_UNSUPPORTED - The command described by the SCSI Request Packet
is not supported by the SCSI initiator(i.e., SCSI
Host Controller). The SCSI Request Packet was not
sent, so no additional status information is
available.
EFI_TIMEOUT - A timeout occurred while waiting for the SCSI
Request Packet to execute. See HostAdapterStatus,
TargetStatus, SenseDataLength, and SenseData in
that order for additional status information.
--*/
{
SCSI_IO_DEV *ScsiIoDevice;
EFI_STATUS Status;
EFI_SCSI_PASS_THRU_SCSI_REQUEST_PACKET *RequestPacket;
if (Packet == NULL) {
return EFI_INVALID_PARAMETER;
}
ScsiIoDevice = SCSI_IO_DEV_FROM_THIS (This);
RequestPacket = (EFI_SCSI_PASS_THRU_SCSI_REQUEST_PACKET *) Packet;
Status = ScsiIoDevice->ScsiPassThru->PassThru (
ScsiIoDevice->ScsiPassThru,
ScsiIoDevice->Pun,
ScsiIoDevice->Lun,
RequestPacket,
Event
);
return Status;
}
EFI_STATUS
ScsiScanCreateDevice (
EFI_DRIVER_BINDING_PROTOCOL *This,
EFI_HANDLE Controller,
UINT32 Pun,
UINT64 Lun,
EFI_SCSI_PASS_THRU_PROTOCOL *ScsiPassThru,
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath
)
/*++
Routine Description:
TODO: Add function description
Arguments:
This - TODO: add argument description
Controller - TODO: add argument description
Pun - TODO: add argument description
Lun - TODO: add argument description
ScsiPassThru - TODO: add argument description
ParentDevicePath - TODO: add argument description
Returns:
EFI_SUCCESS - TODO: Add description for return value
EFI_OUT_OF_RESOURCES - TODO: Add description for return value
EFI_SUCCESS - TODO: Add description for return value
--*/
{
EFI_STATUS Status;
SCSI_IO_DEV *ScsiIoDevice;
EFI_DEVICE_PATH_PROTOCOL *ScsiDevicePath;
Status = gBS->AllocatePool (
EfiBootServicesData,
sizeof (SCSI_IO_DEV),
(VOID **) &ScsiIoDevice
);
if (EFI_ERROR (Status)) {
return Status;
}
ZeroMem (ScsiIoDevice, sizeof (SCSI_IO_DEV));
ScsiIoDevice->Signature = SCSI_IO_DEV_SIGNATURE;
ScsiIoDevice->ScsiPassThru = ScsiPassThru;
ScsiIoDevice->Pun = Pun;
ScsiIoDevice->Lun = Lun;
ScsiIoDevice->ScsiIo.GetDeviceType = ScsiGetDeviceType;
ScsiIoDevice->ScsiIo.GetDeviceLocation = ScsiGetDeviceLocation;
ScsiIoDevice->ScsiIo.ResetBus = ScsiResetBus;
ScsiIoDevice->ScsiIo.ResetDevice = ScsiResetDevice;
ScsiIoDevice->ScsiIo.ExecuteSCSICommand = ScsiExecuteSCSICommand;
if (!DiscoverScsiDevice (ScsiIoDevice)) {
gBS->FreePool (ScsiIoDevice);
return EFI_SUCCESS;
}
//
// Set Device Path
//
Status = ScsiIoDevice->ScsiPassThru->BuildDevicePath (
ScsiIoDevice->ScsiPassThru,
ScsiIoDevice->Pun,
ScsiIoDevice->Lun,
&ScsiDevicePath
);
if (Status == EFI_OUT_OF_RESOURCES) {
gBS->FreePool (ScsiIoDevice);
return Status;
}
ScsiIoDevice->DevicePath = AppendDevicePathNode (
ParentDevicePath,
ScsiDevicePath
);
//
// The memory space for ScsiDevicePath is allocated in
// ScsiPassThru->BuildDevicePath() function; It is no longer used
// after EfiAppendDevicePathNode,so free the memory it occupies.
//
gBS->FreePool (ScsiDevicePath);
if (ScsiIoDevice->DevicePath == NULL) {
gBS->FreePool (ScsiIoDevice);
return EFI_OUT_OF_RESOURCES;
}
Status = gBS->InstallMultipleProtocolInterfaces (
&ScsiIoDevice->Handle,
&gEfiDevicePathProtocolGuid,
ScsiIoDevice->DevicePath,
&gEfiScsiIoProtocolGuid,
&ScsiIoDevice->ScsiIo,
NULL
);
if (EFI_ERROR (Status)) {
gBS->FreePool (ScsiIoDevice);
} else {
gBS->OpenProtocol (
Controller,
&gEfiScsiPassThruProtocolGuid,
(VOID **) &ScsiPassThru,
This->DriverBindingHandle,
ScsiIoDevice->Handle,
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
);
}
return EFI_SUCCESS;
}
BOOLEAN
DiscoverScsiDevice (
SCSI_IO_DEV *ScsiIoDevice
)
/*++
Routine Description:
TODO: Add function description
Arguments:
ScsiIoDevice - TODO: add argument description
Returns:
TODO: add return values
--*/
{
EFI_STATUS Status;
EFI_SCSI_INQUIRY_DATA InquiryData;
UINT32 InquiryDataLength;
EFI_SCSI_SENSE_DATA SenseData;
UINT8 SenseDataLength;
UINT8 HostAdapterStatus;
UINT8 TargetStatus;
HostAdapterStatus = 0;
TargetStatus = 0;
//
// Using Inquiry command to scan for the device
//
InquiryDataLength = sizeof (EFI_SCSI_INQUIRY_DATA);
SenseDataLength = sizeof (EFI_SCSI_SENSE_DATA);
Status = SubmitInquiryCommand (
&ScsiIoDevice->ScsiIo,
EfiScsiStallSeconds (1),
(VOID *) &SenseData,
&SenseDataLength,
&HostAdapterStatus,
&TargetStatus,
(VOID *) &InquiryData,
&InquiryDataLength,
FALSE
);
if (EFI_ERROR (Status)) {
//
// ParseSenseData (&SenseData,SenseDataLength);
//
return FALSE;
}
//
// Retrieved inquiry data successfully
//
if ((InquiryData.Peripheral_Qualifier != 0) &&
(InquiryData.Peripheral_Qualifier != 3)) {
return FALSE;
}
if (InquiryData.Peripheral_Qualifier == 3) {
if (InquiryData.Peripheral_Type != 0x1f) {
return FALSE;
}
}
if ((0x1e >= InquiryData.Peripheral_Type) && (InquiryData.Peripheral_Type >= 0xa)) {
return FALSE;
}
//
// valid device type and peripheral qualifier combination.
//
ScsiIoDevice->ScsiDeviceType = InquiryData.Peripheral_Type;
ScsiIoDevice->RemovableDevice = InquiryData.RMB;
if (InquiryData.Version == 0) {
ScsiIoDevice->ScsiVersion = 0;
} else {
//
// ANSI-approved version
//
ScsiIoDevice->ScsiVersion = (UINT8) (InquiryData.Version & 0x03);
}
return TRUE;
}
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