IScsiDriver.c revision 4fd606d1f5abe38e1f42c38de1d2e895166bd0f4
/** @file
The entry point of IScsi driver.
Copyright (c) 2004 - 2011, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "IScsiImpl.h"
0xa,
NULL,
};
/**
Tests to see if this driver supports a given controller. If a child device is provided,
it further tests to see if this driver supports creating a handle for the specified child device.
@param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
@param[in] ControllerHandle The handle of the controller to test. This handle
must support a protocol interface that supplies
an I/O abstraction to the driver.
@param[in] RemainingDevicePath A pointer to the remaining portion of a device path.
This parameter is ignored by device drivers, and is optional for bus drivers.
@retval EFI_SUCCESS The device specified by ControllerHandle and
RemainingDevicePath is supported by the driver specified by This.
@retval EFI_ALREADY_STARTED The device specified by ControllerHandle and
RemainingDevicePath is already being managed by the driver
specified by This.
@retval EFI_ACCESS_DENIED The device specified by ControllerHandle and
RemainingDevicePath is already being managed by a different
driver or an application that requires exclusive acces.
Currently not implemented.
@retval EFI_UNSUPPORTED The device specified by ControllerHandle and
RemainingDevicePath is not supported by the driver specified by This.
**/
)
{
NULL,
);
return EFI_ALREADY_STARTED;
}
NULL,
);
return EFI_UNSUPPORTED;
}
if (CurrentDevicePath != NULL) {
while (!IsDevicePathEnd (CurrentDevicePath)) {
if ((CurrentDevicePath->Type == MESSAGING_DEVICE_PATH) && (CurrentDevicePath->SubType == MSG_ISCSI_DP)) {
return EFI_SUCCESS;
}
}
return EFI_UNSUPPORTED;
}
return EFI_SUCCESS;
}
/**
Start this driver on ControllerHandle.
The Start() function is designed to be invoked from the EFI boot service ConnectController().
As a result, much of the error checking on the parameters to Start() has been moved into this
common boot service. It is legal to call Start() from other locations, but the following calling
restrictions must be followed or the system behavior will not be deterministic.
1. ControllerHandle must be a valid EFI_HANDLE.
2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned
EFI_DEVICE_PATH_PROTOCOL.
3. Prior to calling Start(), the Supported() function for the driver specified by This must
have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS.
@param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
@param[in] ControllerHandle The handle of the controller to start. This handle
must support a protocol interface that supplies
an I/O abstraction to the driver.
@param[in] RemainingDevicePath A pointer to the remaining portion of a device path.
This parameter is ignored by device drivers, and is optional for bus drivers.
@retval EFI_SUCCESS The device was started.
@retval EFI_DEVICE_ERROR The device could not be started due to a device error.
Currently not implemented.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
@retval Others The driver failded to start the device.
**/
)
{
return EFI_OUT_OF_RESOURCES;
}
//
// Create a underlayer child instance, but not need to configure it. Just open ChildHandle
// via BY_DRIVER. That is, establishing the relationship between ControllerHandle and ChildHandle.
// Therefore, when DisconnectController(), especially VLAN virtual controller handle,
// IScsiDriverBindingStop() will be called.
//
);
goto ON_ERROR;
}
);
goto ON_ERROR;
}
//
// Always install private protocol no matter what happens later. We need to
// keep the relationship between ControllerHandle and ChildHandle.
//
);
goto ON_ERROR;
}
//
// Try to add a port configuration page for this controller.
//
//
// Get the iSCSI configuration data of this controller.
//
goto ON_ERROR;
}
//
// Try to login and create an iSCSI session according to the configuration.
//
if (Status == EFI_MEDIA_CHANGED) {
//
// The specified target is not available and the redirection information is
// got, login the session again with the updated target address.
//
}
goto ON_ERROR;
}
//
// Duplicate the Session's tcp connection device path. The source port field
// will be set to zero as one iSCSI session is comprised of several iSCSI
// connections.
//
goto ON_ERROR;
}
//
// Install the updated device path onto the ExtScsiPassThruHandle.
//
);
goto ON_ERROR;
}
//
//
IScsiPublishIbft ();
return EFI_SUCCESS;
return Status;
}
/**
Stop this driver on ControllerHandle.
Release the control of this controller and remove the IScsi functions. The Stop()
function is designed to be invoked from the EFI boot service DisconnectController().
As a result, much of the error checking on the parameters to Stop() has been moved
into this common boot service. It is legal to call Stop() from other locations,
but the following calling restrictions must be followed or the system behavior will not be deterministic.
1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this
same driver's Start() function.
2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid
EFI_HANDLE. In addition, all of these handles must have been created in this driver's
Start() function, and the Start() function must have called OpenProtocol() on
ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
@param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
@param[in] ControllerHandle A handle to the device being stopped. The handle must
support a bus specific I/O protocol for the driver
to use to stop the device.
@param[in] NumberOfChildren The number of child device handles in ChildHandleBuffer.Not used.
@param[in] ChildHandleBuffer An array of child handles to be freed. May be NULL
if NumberOfChildren is 0.Not used.
@retval EFI_SUCCESS The device was stopped.
@retval EFI_DEVICE_ERROR The device could not be stopped due to a device error.
**/
)
{
if (NumberOfChildren != 0) {
//
// We should have only one child.
//
);
return EFI_DEVICE_ERROR;
}
//
// Previously the TCP4 protocol is opened BY_CHILD_CONTROLLER. Just close
// the protocol here but not uninstall the device path protocol and
// EXT SCSI PASS THRU protocol installed on ExtScsiPassThruHandle.
//
gBS->CloseProtocol (
);
return EFI_SUCCESS;
}
//
// Get the handle of the controller we are controling.
//
(VOID **)&IScsiIdentifier,
);
return EFI_DEVICE_ERROR;
}
);
);
}
//
// Uninstall the private protocol.
//
);
//
// Update the iSCSI Boot Firware Table.
//
IScsiPublishIbft ();
return EFI_SUCCESS;
}
/**
Unloads an image(the iSCSI driver).
@param[in] ImageHandle Handle that identifies the image to be unloaded.
@retval EFI_SUCCESS The image has been unloaded.
@retval Others Other errors as indicated.
**/
)
{
//
// Try to disonnect the driver from the devices it's controlling.
//
NULL,
NULL,
);
);
}
if (DeviceHandleBuffer != NULL) {
}
}
//
// Unload the iSCSI configuration form.
//
//
// Uninstall the protocols installed by iSCSI driver.
//
);
return Status;
}
/**
This is the declaration of an EFI image entry point. This entry point is
the same for UEFI Applications, UEFI OS Loaders, and UEFI Drivers including
both device drivers and bus drivers. It initialize the global variables and
publish the driver binding protocol.
@param[in] ImageHandle The firmware allocated handle for the UEFI image.
@param[in] SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_ACCESS_DENIED EFI_ISCSI_INITIATOR_NAME_PROTOCOL was installed unexpectedly.
@retval Others Other errors as indicated.
**/
)
{
//
// There should be only one EFI_ISCSI_INITIATOR_NAME_PROTOCOL.
//
NULL,
(VOID**) &IScsiInitiatorName
);
return EFI_ACCESS_DENIED;
}
//
// Initialize the EFI Driver Library
//
);
//
// Install the iSCSI Initiator Name Protocol.
//
);
);
return Status;
}
//
// Initialize the configuration form of iSCSI.
//
Status = IScsiConfigFormInit ();
);
}
}
return Status;
}