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/** @file
This is service binding for Hash driver.
Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "Driver.h"
EFI_SERVICE_BINDING_PROTOCOL mHash2ServiceBindingProtocol = {
Hash2ServiceBindingCreateChild,
Hash2ServiceBindingDestroyChild
};
/**
Creates a child handle with a set of I/O services.
@param[in] This Protocol instance pointer.
@param[in, out] ChildHandle Pointer to the handle of the child to create. If
it is NULL, then a new handle is created. If
it is not NULL, then the I/O services are added
to the existing child handle.
@retval EFI_SUCCESS The protocol was added to ChildHandle.
@retval EFI_INVALID_PARAMETER ChildHandle is NULL.
@retval EFI_OUT_OF_RESOURCES There are not enough resources available to
create the child.
@retval Others The child handle was not created.
**/
EFI_STATUS
EFIAPI
Hash2ServiceBindingCreateChild (
IN EFI_SERVICE_BINDING_PROTOCOL *This,
IN OUT EFI_HANDLE *ChildHandle
)
{
EFI_STATUS Status;
HASH2_SERVICE_DATA *Hash2ServiceData;
HASH2_INSTANCE_DATA *Instance;
EFI_TPL OldTpl;
if ((This == NULL) || (ChildHandle == NULL)) {
return EFI_INVALID_PARAMETER;
}
Hash2ServiceData = HASH2_SERVICE_DATA_FROM_THIS (This);
//
// Allocate buffer for the new instance.
//
Instance = AllocateZeroPool (sizeof (HASH2_INSTANCE_DATA));
if (Instance == NULL) {
return EFI_OUT_OF_RESOURCES;
}
//
// Init the instance data.
//
Instance->Signature = HASH2_INSTANCE_DATA_SIGNATURE;
CopyMem (&Instance->Hash2Protocol, &mHash2Protocol, sizeof (Instance->Hash2Protocol));
Instance->Hash2ServiceData = Hash2ServiceData;
Status = gBS->InstallMultipleProtocolInterfaces (
ChildHandle,
&gEfiHash2ProtocolGuid,
&Instance->Hash2Protocol,
NULL
);
if (EFI_ERROR (Status)) {
FreePool (Instance);
return Status;
}
Instance->Handle = *ChildHandle;
//
// Add the child instance into ChildrenList.
//
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
InsertTailList (&Hash2ServiceData->ChildrenList, &Instance->InstEntry);
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Destroys a child handle with a set of I/O services.
The DestroyChild() function does the opposite of CreateChild(). It removes a
protocol that was installed by CreateChild() from ChildHandle. If the removed
protocol is the last protocol on ChildHandle, then ChildHandle is destroyed.
@param[in] This Pointer to the EFI_SERVICE_BINDING_PROTOCOL
instance.
@param[in] ChildHandle Handle of the child to destroy.
@retval EFI_SUCCESS The protocol was removed from ChildHandle.
@retval EFI_UNSUPPORTED ChildHandle does not support the protocol that
is being removed.
@retval EFI_INVALID_PARAMETER ChildHandle is NULL.
@retval EFI_ACCESS_DENIED The protocol could not be removed from the
ChildHandle because its services are being
used.
@retval Others The child handle was not destroyed.
**/
EFI_STATUS
EFIAPI
Hash2ServiceBindingDestroyChild (
IN EFI_SERVICE_BINDING_PROTOCOL *This,
IN EFI_HANDLE ChildHandle
)
{
EFI_STATUS Status;
HASH2_SERVICE_DATA *Hash2ServiceData;
EFI_HASH2_PROTOCOL *Hash2Protocol;
HASH2_INSTANCE_DATA *Instance;
EFI_TPL OldTpl;
LIST_ENTRY *Entry;
if ((This == NULL) || (ChildHandle == NULL)) {
return EFI_INVALID_PARAMETER;
}
Hash2ServiceData = HASH2_SERVICE_DATA_FROM_THIS (This);
//
// Check if this ChildHandle is valid
//
Instance = NULL;
for(Entry = (&Hash2ServiceData->ChildrenList)->ForwardLink; Entry != (&Hash2ServiceData->ChildrenList); Entry = Entry->ForwardLink) {
Instance = HASH2_INSTANCE_DATA_FROM_LINK (Entry);
if (Instance->Handle == ChildHandle) {
break;
} else {
Instance = NULL;
}
}
if (Instance == NULL) {
DEBUG ((EFI_D_ERROR, "Hash2ServiceBindingDestroyChild - Invalid handle\n"));
return EFI_UNSUPPORTED;
}
//
// Get HashProtocol
//
Status = gBS->HandleProtocol (
ChildHandle,
&gEfiHash2ProtocolGuid,
(VOID **)&Hash2Protocol
);
if (EFI_ERROR (Status)) {
return Status;
}
ASSERT (Hash2Protocol == &Instance->Hash2Protocol);
//
// Uninstall the Hash protocol.
//
Status = gBS->UninstallMultipleProtocolInterfaces (
ChildHandle,
&gEfiHash2ProtocolGuid,
&Instance->Hash2Protocol,
NULL
);
if (EFI_ERROR (Status)) {
return Status;
}
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
//
// Remove this instance from the ChildrenList.
//
RemoveEntryList (&Instance->InstEntry);
gBS->RestoreTPL (OldTpl);
FreePool (Instance);
return Status;
}
/**
The entry point for Hash driver which installs the service binding protocol.
@param[in] ImageHandle The image handle of the driver.
@param[in] SystemTable The system table.
@retval EFI_SUCCESS The service binding protocols is successfully installed.
@retval Others Other errors as indicated.
**/
EFI_STATUS
EFIAPI
Hash2DriverEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
HASH2_SERVICE_DATA *Hash2ServiceData;
//
// Initialize the Hash Service Data.
//
Hash2ServiceData = AllocateZeroPool (sizeof (HASH2_SERVICE_DATA));
if (Hash2ServiceData == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Hash2ServiceData->Signature = HASH2_SERVICE_DATA_SIGNATURE;
CopyMem (&Hash2ServiceData->ServiceBinding, &mHash2ServiceBindingProtocol, sizeof (EFI_SERVICE_BINDING_PROTOCOL));
InitializeListHead (&Hash2ServiceData->ChildrenList);
//
// Install the HASH Service Binding Protocol
//
Status = gBS->InstallMultipleProtocolInterfaces (
&Hash2ServiceData->ServiceHandle,
&gEfiHash2ServiceBindingProtocolGuid,
&Hash2ServiceData->ServiceBinding,
NULL
);
if (EFI_ERROR (Status)) {
FreePool (Hash2ServiceData);
}
return Status;
}
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