mirror of https://github.com/acidanthera/audk.git
495 lines
17 KiB
C
495 lines
17 KiB
C
/** @file
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The entry point of IScsi driver.
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Copyright (c) 2004 - 2008, Intel Corporation.<BR>
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "IScsiImpl.h"
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EFI_DRIVER_BINDING_PROTOCOL gIScsiDriverBinding = {
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IScsiDriverBindingSupported,
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IScsiDriverBindingStart,
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IScsiDriverBindingStop,
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0xa,
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NULL,
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NULL
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};
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EFI_GUID gIScsiPrivateGuid = ISCSI_PRIVATE_GUID;
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/**
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Tests to see if this driver supports a given controller. If a child device is provided,
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it further tests to see if this driver supports creating a handle for the specified child device.
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@param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
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@param[in] ControllerHandle The handle of the controller to test. This handle
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must support a protocol interface that supplies
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an I/O abstraction to the driver.
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@param[in] RemainingDevicePath A pointer to the remaining portion of a device path.
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This parameter is ignored by device drivers, and is optional for bus drivers.
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@retval EFI_SUCCESS The device specified by ControllerHandle and
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RemainingDevicePath is supported by the driver specified by This.
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@retval EFI_ALREADY_STARTED The device specified by ControllerHandle and
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RemainingDevicePath is already being managed by the driver
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specified by This.
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@retval EFI_ACCESS_DENIED The device specified by ControllerHandle and
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RemainingDevicePath is already being managed by a different
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driver or an application that requires exclusive acces.
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Currently not implemented.
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@retval EFI_UNSUPPORTED The device specified by ControllerHandle and
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RemainingDevicePath is not supported by the driver specified by This.
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**/
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EFI_STATUS
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EFIAPI
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IScsiDriverBindingSupported (
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IN EFI_DRIVER_BINDING_PROTOCOL *This,
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IN EFI_HANDLE ControllerHandle,
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IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
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)
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{
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EFI_STATUS Status;
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EFI_DEVICE_PATH_PROTOCOL *CurrentDevicePath;
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Status = gBS->OpenProtocol (
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ControllerHandle,
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&gIScsiPrivateGuid,
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NULL,
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This->DriverBindingHandle,
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ControllerHandle,
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EFI_OPEN_PROTOCOL_TEST_PROTOCOL
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);
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if (!EFI_ERROR (Status)) {
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return EFI_ALREADY_STARTED;
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}
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Status = gBS->OpenProtocol (
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ControllerHandle,
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&gEfiTcp4ServiceBindingProtocolGuid,
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NULL,
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This->DriverBindingHandle,
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ControllerHandle,
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EFI_OPEN_PROTOCOL_TEST_PROTOCOL
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);
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if (EFI_ERROR (Status)) {
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return EFI_UNSUPPORTED;
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}
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CurrentDevicePath = RemainingDevicePath;
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if (CurrentDevicePath != NULL) {
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while (!IsDevicePathEnd (CurrentDevicePath)) {
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if ((CurrentDevicePath->Type == MESSAGING_DEVICE_PATH) && (CurrentDevicePath->SubType == MSG_ISCSI_DP)) {
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return EFI_SUCCESS;
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}
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CurrentDevicePath = NextDevicePathNode (CurrentDevicePath);
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}
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return EFI_UNSUPPORTED;
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}
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return EFI_SUCCESS;
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}
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/**
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Start this driver on ControllerHandle.
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The Start() function is designed to be invoked from the EFI boot service ConnectController().
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As a result, much of the error checking on the parameters to Start() has been moved into this
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common boot service. It is legal to call Start() from other locations, but the following calling
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restrictions must be followed or the system behavior will not be deterministic.
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1. ControllerHandle must be a valid EFI_HANDLE.
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2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned
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EFI_DEVICE_PATH_PROTOCOL.
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3. Prior to calling Start(), the Supported() function for the driver specified by This must
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have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS.
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@param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
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@param[in] ControllerHandle The handle of the controller to start. This handle
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must support a protocol interface that supplies
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an I/O abstraction to the driver.
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@param[in] RemainingDevicePath A pointer to the remaining portion of a device path.
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This parameter is ignored by device drivers, and is optional for bus drivers.
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@retval EFI_SUCCESS The device was started.
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@retval EFI_DEVICE_ERROR The device could not be started due to a device error.
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Currently not implemented.
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@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
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@retval Others The driver failded to start the device.
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**/
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EFI_STATUS
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EFIAPI
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IScsiDriverBindingStart (
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IN EFI_DRIVER_BINDING_PROTOCOL *This,
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IN EFI_HANDLE ControllerHandle,
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IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
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)
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{
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EFI_STATUS Status;
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ISCSI_DRIVER_DATA *Private;
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//
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// Try to add a port configuration page for this controller.
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//
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IScsiConfigUpdateForm (This->DriverBindingHandle, ControllerHandle, TRUE);
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Private = IScsiCreateDriverData (This->DriverBindingHandle, ControllerHandle);
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if (Private == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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//
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// Get the iSCSI configuration data of this controller.
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//
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Status = IScsiGetConfigData (Private);
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if (EFI_ERROR (Status)) {
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goto ON_ERROR;
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}
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//
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// Try to login and create an iSCSI session according to the configuration.
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//
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Status = IScsiSessionLogin (Private);
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if (Status == EFI_MEDIA_CHANGED) {
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//
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// The specified target is not available and the redirection information is
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// got, login the session again with the updated target address.
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//
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Status = IScsiSessionLogin (Private);
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}
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if (EFI_ERROR (Status)) {
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goto ON_ERROR;
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}
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//
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// Duplicate the Session's tcp connection device path. The source port field
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// will be set to zero as one iSCSI session is comprised of several iSCSI
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// connections.
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//
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Private->DevicePath = IScsiGetTcpConnDevicePath (Private);
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if (Private->DevicePath == NULL) {
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goto ON_ERROR;
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}
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//
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// Install the updated device path onto the ExtScsiPassThruHandle.
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//
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Status = gBS->InstallProtocolInterface (
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&Private->ExtScsiPassThruHandle,
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&gEfiDevicePathProtocolGuid,
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EFI_NATIVE_INTERFACE,
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Private->DevicePath
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);
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if (EFI_ERROR (Status)) {
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goto ON_ERROR;
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}
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//
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// Install the iSCSI private stuff as a flag to indicate this controller
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// is already controlled by iSCSI driver.
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//
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Status = gBS->InstallProtocolInterface (
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&ControllerHandle,
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&gIScsiPrivateGuid,
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EFI_NATIVE_INTERFACE,
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&Private->IScsiIdentifier
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);
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if (EFI_ERROR (Status)) {
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goto ON_ERROR;
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}
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//
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// Update/Publish the iSCSI Boot Firmware Table.
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//
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IScsiPublishIbft ();
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return EFI_SUCCESS;
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ON_ERROR:
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IScsiSessionAbort (&Private->Session);
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IScsiCleanDriverData (Private);
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return Status;
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}
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/**
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Stop this driver on ControllerHandle.
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Release the control of this controller and remove the IScsi functions. The Stop()
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function is designed to be invoked from the EFI boot service DisconnectController().
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As a result, much of the error checking on the parameters to Stop() has been moved
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into this common boot service. It is legal to call Stop() from other locations,
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but the following calling restrictions must be followed or the system behavior will not be deterministic.
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1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this
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same driver's Start() function.
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2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid
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EFI_HANDLE. In addition, all of these handles must have been created in this driver's
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Start() function, and the Start() function must have called OpenProtocol() on
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ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
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@param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
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@param[in] ControllerHandle A handle to the device being stopped. The handle must
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support a bus specific I/O protocol for the driver
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to use to stop the device.
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@param[in] NumberOfChildren The number of child device handles in ChildHandleBuffer.Not used.
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@param[in] ChildHandleBuffer An array of child handles to be freed. May be NULL
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if NumberOfChildren is 0.Not used.
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@retval EFI_SUCCESS The device was stopped.
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@retval EFI_DEVICE_ERROR The device could not be stopped due to a device error.
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**/
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EFI_STATUS
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EFIAPI
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IScsiDriverBindingStop (
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IN EFI_DRIVER_BINDING_PROTOCOL *This,
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IN EFI_HANDLE ControllerHandle,
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IN UINTN NumberOfChildren,
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IN EFI_HANDLE *ChildHandleBuffer OPTIONAL
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)
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{
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EFI_HANDLE IScsiController;
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EFI_STATUS Status;
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ISCSI_PRIVATE_PROTOCOL *IScsiIdentifier;
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ISCSI_DRIVER_DATA *Private;
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EFI_EXT_SCSI_PASS_THRU_PROTOCOL *PassThru;
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ISCSI_CONNECTION *Conn;
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if (NumberOfChildren != 0) {
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//
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// We should have only one child.
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//
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Status = gBS->OpenProtocol (
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ChildHandleBuffer[0],
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&gEfiExtScsiPassThruProtocolGuid,
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(VOID **) &PassThru,
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This->DriverBindingHandle,
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ControllerHandle,
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EFI_OPEN_PROTOCOL_GET_PROTOCOL
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);
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if (EFI_ERROR (Status)) {
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return EFI_DEVICE_ERROR;
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}
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Private = ISCSI_DRIVER_DATA_FROM_EXT_SCSI_PASS_THRU (PassThru);
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Conn = NET_LIST_HEAD (&Private->Session.Conns, ISCSI_CONNECTION, Link);
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//
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// Previously the TCP4 protocol is opened BY_CHILD_CONTROLLER. Just close
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// the protocol here but not uninstall the device path protocol and
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// EXT SCSI PASS THRU protocol installed on ExtScsiPassThruHandle.
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//
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gBS->CloseProtocol (
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Conn->Tcp4Io.Handle,
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&gEfiTcp4ProtocolGuid,
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Private->Image,
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Private->ExtScsiPassThruHandle
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);
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return EFI_SUCCESS;
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}
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//
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// Get the handle of the controller we are controling.
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//
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IScsiController = NetLibGetNicHandle (ControllerHandle, &gEfiTcp4ProtocolGuid);
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Status = gBS->OpenProtocol (
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IScsiController,
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&gIScsiPrivateGuid,
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(VOID **)&IScsiIdentifier,
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This->DriverBindingHandle,
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ControllerHandle,
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EFI_OPEN_PROTOCOL_GET_PROTOCOL
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);
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if (EFI_ERROR (Status)) {
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return EFI_DEVICE_ERROR;
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}
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Private = ISCSI_DRIVER_DATA_FROM_IDENTIFIER (IScsiIdentifier);
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//
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// Uninstall the private protocol.
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//
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gBS->UninstallProtocolInterface (
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IScsiController,
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&gIScsiPrivateGuid,
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&Private->IScsiIdentifier
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);
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//
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// Update the iSCSI Boot Firware Table.
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//
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IScsiPublishIbft ();
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IScsiSessionAbort (&Private->Session);
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IScsiCleanDriverData (Private);
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return EFI_SUCCESS;
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}
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/**
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Unloads an image(the iSCSI driver).
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@param[in] ImageHandle Handle that identifies the image to be unloaded.
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@retval EFI_SUCCESS The image has been unloaded.
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@retval Others Other errors as indicated.
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**/
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EFI_STATUS
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EFIAPI
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EfiIScsiUnload (
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IN EFI_HANDLE ImageHandle
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)
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{
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EFI_STATUS Status;
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UINTN DeviceHandleCount;
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EFI_HANDLE *DeviceHandleBuffer;
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UINTN Index;
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//
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// Try to disonnect the driver from the devices it's controlling.
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//
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Status = gBS->LocateHandleBuffer (
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AllHandles,
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NULL,
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NULL,
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&DeviceHandleCount,
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&DeviceHandleBuffer
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);
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if (!EFI_ERROR (Status)) {
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for (Index = 0; Index < DeviceHandleCount; Index++) {
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Status = gBS->DisconnectController (
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DeviceHandleBuffer[Index],
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ImageHandle,
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NULL
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);
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}
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if (DeviceHandleBuffer != NULL) {
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gBS->FreePool (DeviceHandleBuffer);
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}
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}
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//
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// Unload the iSCSI configuration form.
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//
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IScsiConfigFormUnload (gIScsiDriverBinding.DriverBindingHandle);
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//
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// Uninstall the protocols installed by iSCSI driver.
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//
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Status = gBS->UninstallMultipleProtocolInterfaces (
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ImageHandle,
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&gEfiDriverBindingProtocolGuid,
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&gIScsiDriverBinding,
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&gEfiComponentName2ProtocolGuid,
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&gIScsiComponentName2,
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&gEfiComponentNameProtocolGuid,
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&gIScsiComponentName,
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&gEfiIScsiInitiatorNameProtocolGuid,
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&gIScsiInitiatorName,
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NULL
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);
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return Status;
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}
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/**
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This is the declaration of an EFI image entry point. This entry point is
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the same for UEFI Applications, UEFI OS Loaders, and UEFI Drivers including
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both device drivers and bus drivers. It initialize the global variables and
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publish the driver binding protocol.
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@param[in] ImageHandle The firmware allocated handle for the UEFI image.
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@param[in] SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS The operation completed successfully.
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@retval EFI_ACCESS_DENIED EFI_ISCSI_INITIATOR_NAME_PROTOCOL was installed unexpectedly.
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@retval Others Other errors as indicated.
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**/
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EFI_STATUS
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EFIAPI
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IScsiDriverEntryPoint (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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EFI_ISCSI_INITIATOR_NAME_PROTOCOL *IScsiInitiatorName;
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//
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// There should be only one EFI_ISCSI_INITIATOR_NAME_PROTOCOL.
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//
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Status = gBS->LocateProtocol (
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&gEfiIScsiInitiatorNameProtocolGuid,
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NULL,
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(VOID**) &IScsiInitiatorName
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);
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if (!EFI_ERROR (Status)) {
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return EFI_ACCESS_DENIED;
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}
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//
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// Initialize the EFI Driver Library
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//
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Status = EfiLibInstallDriverBindingComponentName2 (
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ImageHandle,
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SystemTable,
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&gIScsiDriverBinding,
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ImageHandle,
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&gIScsiComponentName,
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&gIScsiComponentName2
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);
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if (!EFI_ERROR (Status)) {
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//
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// Install the iSCSI Initiator Name Protocol.
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//
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Status = gBS->InstallProtocolInterface (
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&ImageHandle,
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&gEfiIScsiInitiatorNameProtocolGuid,
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EFI_NATIVE_INTERFACE,
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&gIScsiInitiatorName
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);
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if (EFI_ERROR (Status)) {
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gBS->UninstallMultipleProtocolInterfaces (
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ImageHandle,
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&gEfiDriverBindingProtocolGuid,
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&gIScsiDriverBinding,
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&gEfiComponentName2ProtocolGuid,
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&gIScsiComponentName2,
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&gEfiComponentNameProtocolGuid,
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&gIScsiComponentName,
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NULL
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);
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return Status;
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}
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//
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// Initialize the configuration form of iSCSI.
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//
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Status = IScsiConfigFormInit ();
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if (EFI_ERROR (Status)) {
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gBS->UninstallMultipleProtocolInterfaces (
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ImageHandle,
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&gEfiDriverBindingProtocolGuid,
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&gIScsiDriverBinding,
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&gEfiComponentName2ProtocolGuid,
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&gIScsiComponentName2,
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&gEfiComponentNameProtocolGuid,
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&gIScsiComponentName,
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&gEfiIScsiInitiatorNameProtocolGuid,
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&gIScsiInitiatorName,
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NULL
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);
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}
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}
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return Status;
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}
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|