848 lines
35 KiB
C
848 lines
35 KiB
C
/** @file
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Driver entry point
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Copyright (c) 2021 - 2023 Pedro Falcato All rights reserved.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "Ext4Dxe.h"
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GLOBAL_REMOVE_IF_UNREFERENCED EFI_UNICODE_STRING_TABLE mExt4DriverNameTable[] = {
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{
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"eng;en",
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L"Ext4 File System Driver"
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},
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{
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NULL,
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NULL
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}
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};
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GLOBAL_REMOVE_IF_UNREFERENCED EFI_UNICODE_STRING_TABLE mExt4ControllerNameTable[] = {
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{
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"eng;en",
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L"Ext4 File System"
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},
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{
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NULL,
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NULL
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}
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};
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// Needed by gExt4ComponentName*
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/**
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Retrieves a Unicode string that is the user-readable name of the EFI Driver.
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@param[in] This A pointer to the EFI_COMPONENT_NAME_PROTOCOL instance.
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@param[in] Language A pointer to a three-character ISO 639-2 language identifier.
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This is the language of the driver name that that the caller
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is requesting, and it must match one of the languages specified
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in SupportedLanguages. The number of languages supported by a
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driver is up to the driver writer.
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@param[out] DriverName A pointer to the Unicode string to return. This Unicode string
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is the name of the driver specified by This in the language
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specified by Language.
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@retval EFI_SUCCESS The Unicode string for the Driver specified by This
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and the language specified by Language was returned
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in DriverName.
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@retval EFI_INVALID_PARAMETER Language is NULL.
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@retval EFI_INVALID_PARAMETER DriverName is NULL.
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@retval EFI_UNSUPPORTED The driver specified by This does not support the
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language specified by Language.
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**/
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EFI_STATUS
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EFIAPI
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Ext4ComponentNameGetDriverName (
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IN EFI_COMPONENT_NAME_PROTOCOL *This,
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IN CHAR8 *Language,
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OUT CHAR16 **DriverName
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);
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/**
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Retrieves a Unicode string that is the user readable name of the controller
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that is being managed by an EFI Driver.
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@param[in] This A pointer to the EFI_COMPONENT_NAME_PROTOCOL instance.
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@param[in] ControllerHandle The handle of a controller that the driver specified by
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This is managing. This handle specifies the controller
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whose name is to be returned.
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@param[in] ChildHandle The handle of the child controller to retrieve the name
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of. This is an optional parameter that may be NULL. It
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will be NULL for device drivers. It will also be NULL
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for a bus drivers that wish to retrieve the name of the
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bus controller. It will not be NULL for a bus driver
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that wishes to retrieve the name of a child controller.
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@param[in] Language A pointer to a three character ISO 639-2 language
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identifier. This is the language of the controller name
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that the caller is requesting, and it must match one
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of the languages specified in SupportedLanguages. The
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number of languages supported by a driver is up to the
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driver writer.
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@param[out] ControllerName A pointer to the Unicode string to return. This Unicode
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string is the name of the controller specified by
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ControllerHandle and ChildHandle in the language specified
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by Language, from the point of view of the driver specified
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by This.
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@retval EFI_SUCCESS The Unicode string for the user-readable name in the
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language specified by Language for the driver
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specified by This was returned in DriverName.
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@retval EFI_INVALID_PARAMETER ControllerHandle is NULL.
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@retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid EFI_HANDLE.
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@retval EFI_INVALID_PARAMETER Language is NULL.
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@retval EFI_INVALID_PARAMETER ControllerName is NULL.
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@retval EFI_UNSUPPORTED The driver specified by This is not currently managing
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the controller specified by ControllerHandle and
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ChildHandle.
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@retval EFI_UNSUPPORTED The driver specified by This does not support the
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language specified by Language.
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**/
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EFI_STATUS
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EFIAPI
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Ext4ComponentNameGetControllerName (
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IN EFI_COMPONENT_NAME_PROTOCOL *This,
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IN EFI_HANDLE ControllerHandle,
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IN EFI_HANDLE ChildHandle OPTIONAL,
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IN CHAR8 *Language,
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OUT CHAR16 **ControllerName
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);
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extern EFI_COMPONENT_NAME_PROTOCOL gExt4ComponentName;
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GLOBAL_REMOVE_IF_UNREFERENCED EFI_COMPONENT_NAME_PROTOCOL gExt4ComponentName = {
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Ext4ComponentNameGetDriverName,
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Ext4ComponentNameGetControllerName,
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"eng"
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};
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//
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// EFI Component Name 2 Protocol
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//
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GLOBAL_REMOVE_IF_UNREFERENCED EFI_COMPONENT_NAME2_PROTOCOL gExt4ComponentName2 = {
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(EFI_COMPONENT_NAME2_GET_DRIVER_NAME)Ext4ComponentNameGetDriverName,
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(EFI_COMPONENT_NAME2_GET_CONTROLLER_NAME)Ext4ComponentNameGetControllerName,
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"en"
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};
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// Needed by gExt4BindingProtocol
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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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This function checks to see if the driver specified by This supports the device specified by
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ControllerHandle. Drivers will typically use the device path attached to
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ControllerHandle and/or the services from the bus I/O abstraction attached to
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ControllerHandle to determine if the driver supports ControllerHandle. This function
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may be called many times during platform initialization. In order to reduce boot times, the tests
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performed by this function must be very small, and take as little time as possible to execute. This
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function must not change the state of any hardware devices, and this function must be aware that the
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device specified by ControllerHandle may already be managed by the same driver or a
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different driver. This function must match its calls to AllocatePages() with FreePages(),
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AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().
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Because ControllerHandle may have been previously started by the same driver, if a protocol is
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already in the opened state, then it must not be closed with CloseProtocol(). This is required
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to guarantee the state of ControllerHandle is not modified by this function.
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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. This
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parameter is ignored by device drivers, and is optional for bus
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drivers. For bus drivers, if this parameter is not NULL, then
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the bus driver must determine if the bus controller specified
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by ControllerHandle and the child controller specified
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by RemainingDevicePath are both supported by this
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bus driver.
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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 access.
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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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Ext4IsBindingSupported (
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IN EFI_DRIVER_BINDING_PROTOCOL *BindingProtocol,
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IN EFI_HANDLE ControllerHandle,
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IN EFI_DEVICE_PATH *RemainingDevicePath OPTIONAL
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);
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/**
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Starts a device controller or a bus controller.
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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,
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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.
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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. This
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parameter is ignored by device drivers, and is optional for bus
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drivers. For a bus driver, if this parameter is NULL, then handles
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for all the children of Controller are created by this driver.
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If this parameter is not NULL and the first Device Path Node is
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not the End of Device Path Node, then only the handle for the
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child device specified by the first Device Path Node of
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RemainingDevicePath is created by this driver.
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If the first Device Path Node of RemainingDevicePath is
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the End of Device Path Node, no child handle is created by this
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driver.
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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.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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Ext4Bind (
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IN EFI_DRIVER_BINDING_PROTOCOL *BindingProtocol,
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IN EFI_HANDLE ControllerHandle,
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IN EFI_DEVICE_PATH *RemainingDevicePath OPTIONAL
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);
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/**
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Stops a device controller or a bus controller.
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The Stop() 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.
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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.
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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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Ext4Stop (
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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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EFI_DRIVER_BINDING_PROTOCOL gExt4BindingProtocol =
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{
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.Supported = Ext4IsBindingSupported,
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.Start = Ext4Bind,
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.Stop = Ext4Stop,
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.Version = EXT4_DRIVER_VERSION,
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.ImageHandle = NULL,
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.DriverBindingHandle = NULL
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};
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/**
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Retrieves a Unicode string that is the user readable name of the controller
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that is being managed by an EFI Driver.
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|
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@param[in] This A pointer to the EFI_COMPONENT_NAME_PROTOCOL instance.
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@param[in] ControllerHandle The handle of a controller that the driver specified by
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This is managing. This handle specifies the controller
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whose name is to be returned.
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@param[in] ChildHandle The handle of the child controller to retrieve the name
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of. This is an optional parameter that may be NULL. It
|
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will be NULL for device drivers. It will also be NULL
|
|
for a bus drivers that wish to retrieve the name of the
|
|
bus controller. It will not be NULL for a bus driver
|
|
that wishes to retrieve the name of a child controller.
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@param[in] Language A pointer to a three character ISO 639-2 language
|
|
identifier. This is the language of the controller name
|
|
that the caller is requesting, and it must match one
|
|
of the languages specified in SupportedLanguages. The
|
|
number of languages supported by a driver is up to the
|
|
driver writer.
|
|
@param[out] ControllerName A pointer to the Unicode string to return. This Unicode
|
|
string is the name of the controller specified by
|
|
ControllerHandle and ChildHandle in the language specified
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|
by Language, from the point of view of the driver specified
|
|
by This.
|
|
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@retval EFI_SUCCESS The Unicode string for the user-readable name in the
|
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language specified by Language for the driver
|
|
specified by This was returned in DriverName.
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@retval EFI_INVALID_PARAMETER ControllerHandle is NULL.
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@retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid EFI_HANDLE.
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@retval EFI_INVALID_PARAMETER Language is NULL.
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@retval EFI_INVALID_PARAMETER ControllerName is NULL.
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@retval EFI_UNSUPPORTED The driver specified by This is not currently managing
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the controller specified by ControllerHandle and
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ChildHandle.
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@retval EFI_UNSUPPORTED The driver specified by This does not support the
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language specified by Language.
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**/
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EFI_STATUS
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EFIAPI
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Ext4ComponentNameGetControllerName (
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IN EFI_COMPONENT_NAME_PROTOCOL *This,
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IN EFI_HANDLE ControllerHandle,
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IN EFI_HANDLE ChildHandle OPTIONAL,
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IN CHAR8 *Language,
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OUT CHAR16 **ControllerName
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)
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{
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EFI_STATUS Status;
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if (ChildHandle != NULL) {
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return EFI_UNSUPPORTED;
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}
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// Test if the driver manages ControllHandle
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Status = EfiTestManagedDevice (
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ControllerHandle,
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gExt4BindingProtocol.DriverBindingHandle,
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&gEfiDiskIoProtocolGuid
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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return LookupUnicodeString2 (
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Language,
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This->SupportedLanguages,
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mExt4ControllerNameTable,
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ControllerName,
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(BOOLEAN)(This == &gExt4ComponentName)
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);
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}
|
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/**
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Retrieves a Unicode string that is the user-readable name of the EFI Driver.
|
|
|
|
@param[in] This A pointer to the EFI_COMPONENT_NAME_PROTOCOL instance.
|
|
@param[in] Language A pointer to a three-character ISO 639-2 language identifier.
|
|
This is the language of the driver name that that the caller
|
|
is requesting, and it must match one of the languages specified
|
|
in SupportedLanguages. The number of languages supported by a
|
|
driver is up to the driver writer.
|
|
@param[out] DriverName A pointer to the Unicode string to return. This Unicode string
|
|
is the name of the driver specified by This in the language
|
|
specified by Language.
|
|
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@retval EFI_SUCCESS The Unicode string for the Driver specified by This
|
|
and the language specified by Language was returned
|
|
in DriverName.
|
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@retval EFI_INVALID_PARAMETER Language is NULL.
|
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@retval EFI_INVALID_PARAMETER DriverName is NULL.
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@retval EFI_UNSUPPORTED The driver specified by This does not support the
|
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language specified by Language.
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**/
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EFI_STATUS
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EFIAPI
|
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Ext4ComponentNameGetDriverName (
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IN EFI_COMPONENT_NAME_PROTOCOL *This,
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IN CHAR8 *Language,
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OUT CHAR16 **DriverName
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)
|
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{
|
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return LookupUnicodeString2 (
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Language,
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This->SupportedLanguages,
|
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mExt4DriverNameTable,
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DriverName,
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(BOOLEAN)(This == &gExt4ComponentName)
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);
|
|
}
|
|
|
|
/**
|
|
Stops a device controller or a bus controller.
|
|
|
|
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.
|
|
@param[in] ChildHandleBuffer An array of child handles to be freed. May be NULL
|
|
if NumberOfChildren is 0.
|
|
|
|
@retval EFI_SUCCESS The device was stopped.
|
|
@retval EFI_DEVICE_ERROR The device could not be stopped due to a device error.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
Ext4Stop (
|
|
IN EFI_DRIVER_BINDING_PROTOCOL *This,
|
|
IN EFI_HANDLE ControllerHandle,
|
|
IN UINTN NumberOfChildren,
|
|
IN EFI_HANDLE *ChildHandleBuffer OPTIONAL
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *Sfs;
|
|
EXT4_PARTITION *Partition;
|
|
BOOLEAN HasDiskIo2;
|
|
|
|
Status = gBS->OpenProtocol (
|
|
ControllerHandle,
|
|
&gEfiSimpleFileSystemProtocolGuid,
|
|
(VOID **)&Sfs,
|
|
This->DriverBindingHandle,
|
|
ControllerHandle,
|
|
EFI_OPEN_PROTOCOL_GET_PROTOCOL
|
|
);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Partition = (EXT4_PARTITION *)Sfs;
|
|
|
|
HasDiskIo2 = EXT4_DISK_IO2 (Partition) != NULL;
|
|
|
|
Status = Ext4UnmountAndFreePartition (Partition);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Status = gBS->UninstallMultipleProtocolInterfaces (
|
|
ControllerHandle,
|
|
&gEfiSimpleFileSystemProtocolGuid,
|
|
&Partition->Interface,
|
|
NULL
|
|
);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
// Close all open protocols (DiskIo, DiskIo2, BlockIo)
|
|
|
|
Status = gBS->CloseProtocol (
|
|
ControllerHandle,
|
|
&gEfiDiskIoProtocolGuid,
|
|
This->DriverBindingHandle,
|
|
ControllerHandle
|
|
);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Status = gBS->CloseProtocol (
|
|
ControllerHandle,
|
|
&gEfiBlockIoProtocolGuid,
|
|
This->DriverBindingHandle,
|
|
ControllerHandle
|
|
);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
if (HasDiskIo2) {
|
|
Status = gBS->CloseProtocol (
|
|
ControllerHandle,
|
|
&gEfiDiskIo2ProtocolGuid,
|
|
This->DriverBindingHandle,
|
|
ControllerHandle
|
|
);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
/**
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Ext4Dxe Driver's entry point.
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Called at load time.
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|
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@param[in] ImageHandle Handle to the image.
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@param[in] SystemTable Pointer to the EFI_SYSTEM_TABLE.
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@return Result of the load.
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**/
|
|
EFI_STATUS
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EFIAPI
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Ext4EntryPoint (
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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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return EfiLibInstallAllDriverProtocols2 (
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ImageHandle,
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SystemTable,
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&gExt4BindingProtocol,
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ImageHandle,
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&gExt4ComponentName,
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&gExt4ComponentName2,
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NULL,
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NULL,
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NULL,
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NULL
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);
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}
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/**
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Ext4Dxe Driver's unload callback.
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Called at unload time.
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@param[in] ImageHandle Handle to the image.
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@return Result of the unload.
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**/
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EFI_STATUS
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EFIAPI
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Ext4Unload (
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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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EFI_HANDLE *DeviceHandleBuffer;
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UINTN DeviceHandleCount;
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UINTN Index;
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EFI_HANDLE Handle;
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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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return Status;
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}
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for (Index = 0; Index < DeviceHandleCount; Index++) {
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Handle = DeviceHandleBuffer[Index];
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Status = EfiTestManagedDevice (Handle, ImageHandle, &gEfiDiskIoProtocolGuid);
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if (Status == EFI_SUCCESS) {
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Status = gBS->DisconnectController (Handle, ImageHandle, NULL);
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if (EFI_ERROR (Status)) {
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break;
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}
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}
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}
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FreePool (DeviceHandleBuffer);
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Status = EfiLibUninstallAllDriverProtocols2 (
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&gExt4BindingProtocol,
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&gExt4ComponentName,
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&gExt4ComponentName2,
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NULL,
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NULL,
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NULL,
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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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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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This function checks to see if the driver specified by This supports the device specified by
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ControllerHandle. Drivers will typically use the device path attached to
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ControllerHandle and/or the services from the bus I/O abstraction attached to
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ControllerHandle to determine if the driver supports ControllerHandle. This function
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may be called many times during platform initialization. In order to reduce boot times, the tests
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performed by this function must be very small, and take as little time as possible to execute. This
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function must not change the state of any hardware devices, and this function must be aware that the
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device specified by ControllerHandle may already be managed by the same driver or a
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different driver. This function must match its calls to AllocatePages() with FreePages(),
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AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().
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Because ControllerHandle may have been previously started by the same driver, if a protocol is
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already in the opened state, then it must not be closed with CloseProtocol(). This is required
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to guarantee the state of ControllerHandle is not modified by this function.
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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. This
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parameter is ignored by device drivers, and is optional for bus
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drivers. For bus drivers, if this parameter is not NULL, then
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the bus driver must determine if the bus controller specified
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by ControllerHandle and the child controller specified
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by RemainingDevicePath are both supported by this
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bus driver.
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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 access.
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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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Ext4IsBindingSupported (
|
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IN EFI_DRIVER_BINDING_PROTOCOL *BindingProtocol,
|
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IN EFI_HANDLE ControllerHandle,
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IN EFI_DEVICE_PATH *RemainingDevicePath OPTIONAL
|
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)
|
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{
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EFI_STATUS Status;
|
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EFI_DISK_IO_PROTOCOL *DiskIo;
|
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EFI_BLOCK_IO_PROTOCOL *BlockIo;
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DiskIo = NULL;
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BlockIo = NULL;
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|
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//
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// Open the IO Abstraction(s) needed to perform the supported test
|
|
//
|
|
Status = gBS->OpenProtocol (
|
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ControllerHandle,
|
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&gEfiDiskIoProtocolGuid,
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(VOID **)&DiskIo,
|
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BindingProtocol->DriverBindingHandle,
|
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ControllerHandle,
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EFI_OPEN_PROTOCOL_BY_DRIVER
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);
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|
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if (EFI_ERROR (Status)) {
|
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return Status;
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}
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|
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//
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// Open the IO Abstraction(s) needed to perform the supported test
|
|
//
|
|
Status = gBS->OpenProtocol (
|
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ControllerHandle,
|
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&gEfiBlockIoProtocolGuid,
|
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(VOID **)&BlockIo,
|
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BindingProtocol->DriverBindingHandle,
|
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ControllerHandle,
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EFI_OPEN_PROTOCOL_GET_PROTOCOL
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);
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|
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if (!EFI_ERROR (Status)) {
|
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if (!Ext4SuperblockCheckMagic (DiskIo, BlockIo)) {
|
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Status = EFI_UNSUPPORTED;
|
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}
|
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}
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//
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// Close the I/O Abstraction(s) used to perform the supported test
|
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//
|
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if (DiskIo != NULL) {
|
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gBS->CloseProtocol (
|
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ControllerHandle,
|
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&gEfiDiskIoProtocolGuid,
|
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BindingProtocol->DriverBindingHandle,
|
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ControllerHandle
|
|
);
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}
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if (BlockIo != NULL) {
|
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gBS->CloseProtocol (
|
|
ControllerHandle,
|
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&gEfiBlockIoProtocolGuid,
|
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BindingProtocol->DriverBindingHandle,
|
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ControllerHandle
|
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);
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}
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return Status;
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}
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/**
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Starts a device controller or a bus controller.
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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,
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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.
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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
|
|
an I/O abstraction to the driver.
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@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. For a bus driver, if this parameter is NULL, then handles
|
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for all the children of Controller are created by this driver.
|
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If this parameter is not NULL and the first Device Path Node is
|
|
not the End of Device Path Node, then only the handle for the
|
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child device specified by the first Device Path Node of
|
|
RemainingDevicePath is created by this driver.
|
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If the first Device Path Node of RemainingDevicePath is
|
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the End of Device Path Node, no child handle is created by this
|
|
driver.
|
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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.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
|
|
EFIAPI
|
|
Ext4Bind (
|
|
IN EFI_DRIVER_BINDING_PROTOCOL *BindingProtocol,
|
|
IN EFI_HANDLE ControllerHandle,
|
|
IN EFI_DEVICE_PATH *RemainingDevicePath OPTIONAL
|
|
)
|
|
{
|
|
EFI_DISK_IO_PROTOCOL *DiskIo;
|
|
EFI_DISK_IO2_PROTOCOL *DiskIo2;
|
|
EFI_BLOCK_IO_PROTOCOL *BlockIo;
|
|
EFI_STATUS Status;
|
|
|
|
DiskIo2 = NULL;
|
|
BlockIo = NULL;
|
|
DiskIo = NULL;
|
|
|
|
// Note: We initialize collation here since this is called in BDS, when we are likely
|
|
// to have the Unicode Collation protocols available.
|
|
Status = Ext4InitialiseUnicodeCollation (BindingProtocol->ImageHandle);
|
|
if (EFI_ERROR (Status)) {
|
|
// Lets throw a loud error into the log
|
|
// It is very unlikely something like this may fire out of the blue. Chances are either
|
|
// the platform configuration is wrong, or we are.
|
|
DEBUG ((DEBUG_ERROR, "[ext4] Error: Unicode Collation not available - failure to Start() - error %r\n", Status));
|
|
goto Error;
|
|
}
|
|
|
|
Status = gBS->OpenProtocol (
|
|
ControllerHandle,
|
|
&gEfiDiskIoProtocolGuid,
|
|
(VOID **)&DiskIo,
|
|
BindingProtocol->ImageHandle,
|
|
ControllerHandle,
|
|
EFI_OPEN_PROTOCOL_BY_DRIVER
|
|
);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
goto Error;
|
|
}
|
|
|
|
DEBUG ((DEBUG_INFO, "[ext4] Controller supports DISK_IO\n"));
|
|
|
|
Status = gBS->OpenProtocol (
|
|
ControllerHandle,
|
|
&gEfiDiskIo2ProtocolGuid,
|
|
(VOID **)&DiskIo2,
|
|
BindingProtocol->ImageHandle,
|
|
ControllerHandle,
|
|
EFI_OPEN_PROTOCOL_BY_DRIVER
|
|
);
|
|
// It's okay to not support DISK_IO2
|
|
|
|
if (DiskIo2 != NULL) {
|
|
DEBUG ((DEBUG_INFO, "[ext4] Controller supports DISK_IO2\n"));
|
|
}
|
|
|
|
Status = gBS->OpenProtocol (
|
|
ControllerHandle,
|
|
&gEfiBlockIoProtocolGuid,
|
|
(VOID **)&BlockIo,
|
|
BindingProtocol->ImageHandle,
|
|
ControllerHandle,
|
|
EFI_OPEN_PROTOCOL_GET_PROTOCOL
|
|
);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
goto Error;
|
|
}
|
|
|
|
Status = Ext4OpenPartition (ControllerHandle, DiskIo, DiskIo2, BlockIo);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
DEBUG ((DEBUG_ERROR, "[ext4] Error mounting: %r\n", Status));
|
|
// Falls through to Error
|
|
} else {
|
|
return Status;
|
|
}
|
|
|
|
Error:
|
|
if (DiskIo) {
|
|
gBS->CloseProtocol (
|
|
ControllerHandle,
|
|
&gEfiDiskIoProtocolGuid,
|
|
BindingProtocol->ImageHandle,
|
|
ControllerHandle
|
|
);
|
|
}
|
|
|
|
if (DiskIo2) {
|
|
gBS->CloseProtocol (
|
|
ControllerHandle,
|
|
&gEfiDiskIo2ProtocolGuid,
|
|
BindingProtocol->ImageHandle,
|
|
ControllerHandle
|
|
);
|
|
}
|
|
|
|
if (BlockIo) {
|
|
gBS->CloseProtocol (
|
|
ControllerHandle,
|
|
&gEfiBlockIoProtocolGuid,
|
|
BindingProtocol->ImageHandle,
|
|
ControllerHandle
|
|
);
|
|
}
|
|
|
|
return Status;
|
|
}
|