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959 lines
34 KiB
C
959 lines
34 KiB
C
/** @file
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Support functions to connect/disconnect UEFI Driver model Protocol
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Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "DxeMain.h"
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#include "Handle.h"
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//
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// Driver Support Functions
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//
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/**
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Connects one or more drivers to a controller.
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@param ControllerHandle The handle of the controller to which driver(s) are to be connected.
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@param DriverImageHandle A pointer to an ordered list handles that support the
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EFI_DRIVER_BINDING_PROTOCOL.
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@param RemainingDevicePath A pointer to the device path that specifies a child of the
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controller specified by ControllerHandle.
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@param Recursive If TRUE, then ConnectController() is called recursively
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until the entire tree of controllers below the controller specified
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by ControllerHandle have been created. If FALSE, then
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the tree of controllers is only expanded one level.
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@retval EFI_SUCCESS 1) One or more drivers were connected to ControllerHandle.
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2) No drivers were connected to ControllerHandle, but
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RemainingDevicePath is not NULL, and it is an End Device
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Path Node.
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@retval EFI_INVALID_PARAMETER ControllerHandle is NULL.
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@retval EFI_NOT_FOUND 1) There are no EFI_DRIVER_BINDING_PROTOCOL instances
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present in the system.
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2) No drivers were connected to ControllerHandle.
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@retval EFI_SECURITY_VIOLATION
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The user has no permission to start UEFI device drivers on the device path
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associated with the ControllerHandle or specified by the RemainingDevicePath.
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**/
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EFI_STATUS
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EFIAPI
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CoreConnectController (
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IN EFI_HANDLE ControllerHandle,
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IN EFI_HANDLE *DriverImageHandle OPTIONAL,
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IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL,
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IN BOOLEAN Recursive
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)
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{
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EFI_STATUS Status;
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EFI_STATUS ReturnStatus;
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IHANDLE *Handle;
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PROTOCOL_INTERFACE *Prot;
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LIST_ENTRY *Link;
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LIST_ENTRY *ProtLink;
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OPEN_PROTOCOL_DATA *OpenData;
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EFI_DEVICE_PATH_PROTOCOL *AlignedRemainingDevicePath;
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EFI_HANDLE *ChildHandleBuffer;
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UINTN ChildHandleCount;
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UINTN Index;
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UINTN HandleFilePathSize;
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UINTN RemainingDevicePathSize;
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EFI_DEVICE_PATH_PROTOCOL *HandleFilePath;
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EFI_DEVICE_PATH_PROTOCOL *FilePath;
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EFI_DEVICE_PATH_PROTOCOL *TempFilePath;
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//
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// Make sure ControllerHandle is valid
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//
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Status = CoreValidateHandle (ControllerHandle);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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if (gSecurity2 != NULL) {
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//
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// Check whether the user has permission to start UEFI device drivers.
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//
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Status = CoreHandleProtocol (ControllerHandle, &gEfiDevicePathProtocolGuid, (VOID **)&HandleFilePath);
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if (!EFI_ERROR (Status)) {
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ASSERT (HandleFilePath != NULL);
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FilePath = HandleFilePath;
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TempFilePath = NULL;
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if (RemainingDevicePath != NULL && !Recursive) {
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HandleFilePathSize = GetDevicePathSize (HandleFilePath) - sizeof (EFI_DEVICE_PATH_PROTOCOL);
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RemainingDevicePathSize = GetDevicePathSize (RemainingDevicePath);
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TempFilePath = AllocateZeroPool (HandleFilePathSize + RemainingDevicePathSize);
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ASSERT (TempFilePath != NULL);
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CopyMem (TempFilePath, HandleFilePath, HandleFilePathSize);
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CopyMem ((UINT8 *) TempFilePath + HandleFilePathSize, RemainingDevicePath, RemainingDevicePathSize);
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FilePath = TempFilePath;
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}
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Status = gSecurity2->FileAuthentication (
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gSecurity2,
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FilePath,
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NULL,
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0,
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FALSE
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);
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if (TempFilePath != NULL) {
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FreePool (TempFilePath);
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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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Handle = ControllerHandle;
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//
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// Make a copy of RemainingDevicePath to guanatee it is aligned
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//
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AlignedRemainingDevicePath = NULL;
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if (RemainingDevicePath != NULL) {
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AlignedRemainingDevicePath = DuplicateDevicePath (RemainingDevicePath);
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if (AlignedRemainingDevicePath == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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}
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//
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// Connect all drivers to ControllerHandle
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// If CoreConnectSingleController returns EFI_NOT_READY, then the number of
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// Driver Binding Protocols in the handle database has increased during the call
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// so the connect operation must be restarted
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//
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do {
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ReturnStatus = CoreConnectSingleController (
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ControllerHandle,
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DriverImageHandle,
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AlignedRemainingDevicePath
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);
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} while (ReturnStatus == EFI_NOT_READY);
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//
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// Free the aligned copy of RemainingDevicePath
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//
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if (AlignedRemainingDevicePath != NULL) {
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CoreFreePool (AlignedRemainingDevicePath);
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}
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//
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// If recursive, then connect all drivers to all of ControllerHandle's children
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//
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if (Recursive) {
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//
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// Acquire the protocol lock on the handle database so the child handles can be collected
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//
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CoreAcquireProtocolLock ();
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//
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// Make sure the DriverBindingHandle is valid
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//
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Status = CoreValidateHandle (ControllerHandle);
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if (EFI_ERROR (Status)) {
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//
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// Release the protocol lock on the handle database
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//
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CoreReleaseProtocolLock ();
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return ReturnStatus;
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}
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//
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// Count ControllerHandle's children
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//
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for (Link = Handle->Protocols.ForwardLink, ChildHandleCount = 0; Link != &Handle->Protocols; Link = Link->ForwardLink) {
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Prot = CR(Link, PROTOCOL_INTERFACE, Link, PROTOCOL_INTERFACE_SIGNATURE);
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for (ProtLink = Prot->OpenList.ForwardLink;
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ProtLink != &Prot->OpenList;
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ProtLink = ProtLink->ForwardLink) {
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OpenData = CR (ProtLink, OPEN_PROTOCOL_DATA, Link, OPEN_PROTOCOL_DATA_SIGNATURE);
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if ((OpenData->Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) != 0) {
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ChildHandleCount++;
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}
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}
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}
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//
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// Allocate a handle buffer for ControllerHandle's children
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//
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ChildHandleBuffer = AllocatePool (ChildHandleCount * sizeof(EFI_HANDLE));
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if (ChildHandleBuffer == NULL) {
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CoreReleaseProtocolLock ();
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return EFI_OUT_OF_RESOURCES;
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}
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//
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// Fill in a handle buffer with ControllerHandle's children
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//
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for (Link = Handle->Protocols.ForwardLink, ChildHandleCount = 0; Link != &Handle->Protocols; Link = Link->ForwardLink) {
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Prot = CR(Link, PROTOCOL_INTERFACE, Link, PROTOCOL_INTERFACE_SIGNATURE);
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for (ProtLink = Prot->OpenList.ForwardLink;
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ProtLink != &Prot->OpenList;
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ProtLink = ProtLink->ForwardLink) {
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OpenData = CR (ProtLink, OPEN_PROTOCOL_DATA, Link, OPEN_PROTOCOL_DATA_SIGNATURE);
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if ((OpenData->Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) != 0) {
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ChildHandleBuffer[ChildHandleCount] = OpenData->ControllerHandle;
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ChildHandleCount++;
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}
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}
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}
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//
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// Release the protocol lock on the handle database
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//
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CoreReleaseProtocolLock ();
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//
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// Recursively connect each child handle
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//
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for (Index = 0; Index < ChildHandleCount; Index++) {
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CoreConnectController (
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ChildHandleBuffer[Index],
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NULL,
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NULL,
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TRUE
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);
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}
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//
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// Free the handle buffer of ControllerHandle's children
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//
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CoreFreePool (ChildHandleBuffer);
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}
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return ReturnStatus;
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}
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/**
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Add Driver Binding Protocols from Context Driver Image Handles to sorted
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Driver Binding Protocol list.
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@param DriverBindingHandle Handle of the driver binding
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protocol.
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@param NumberOfSortedDriverBindingProtocols Number Of sorted driver binding
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protocols
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@param SortedDriverBindingProtocols The sorted protocol list.
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@param DriverBindingHandleCount Driver Binding Handle Count.
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@param DriverBindingHandleBuffer The buffer of driver binding
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protocol to be modified.
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@param IsImageHandle Indicate whether
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DriverBindingHandle is an image
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handle
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@return None.
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**/
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VOID
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AddSortedDriverBindingProtocol (
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IN EFI_HANDLE DriverBindingHandle,
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IN OUT UINTN *NumberOfSortedDriverBindingProtocols,
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IN OUT EFI_DRIVER_BINDING_PROTOCOL **SortedDriverBindingProtocols,
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IN UINTN DriverBindingHandleCount,
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IN OUT EFI_HANDLE *DriverBindingHandleBuffer,
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IN BOOLEAN IsImageHandle
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)
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{
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EFI_STATUS Status;
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EFI_DRIVER_BINDING_PROTOCOL *DriverBinding;
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UINTN Index;
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//
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// Make sure the DriverBindingHandle is valid
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//
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Status = CoreValidateHandle (DriverBindingHandle);
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if (EFI_ERROR (Status)) {
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return;
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}
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//
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// If IsImageHandle is TRUE, then DriverBindingHandle is an image handle
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// Find all the DriverBindingHandles associated with that image handle and add them to the sorted list
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//
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if (IsImageHandle) {
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//
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// Loop through all the Driver Binding Handles
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//
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for (Index = 0; Index < DriverBindingHandleCount; Index++) {
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//
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// Retrieve the Driver Binding Protocol associated with each Driver Binding Handle
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//
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Status = CoreHandleProtocol (
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DriverBindingHandleBuffer[Index],
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&gEfiDriverBindingProtocolGuid,
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(VOID **) &DriverBinding
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);
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if (EFI_ERROR (Status) || DriverBinding == NULL) {
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continue;
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}
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//
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// If the ImageHandle associated with DriverBinding matches DriverBindingHandle,
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// then add the DriverBindingProtocol[Index] to the sorted list
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//
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if (DriverBinding->ImageHandle == DriverBindingHandle) {
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AddSortedDriverBindingProtocol (
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DriverBindingHandleBuffer[Index],
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NumberOfSortedDriverBindingProtocols,
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SortedDriverBindingProtocols,
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DriverBindingHandleCount,
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DriverBindingHandleBuffer,
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FALSE
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);
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}
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}
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return;
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}
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//
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// Retrieve the Driver Binding Protocol from DriverBindingHandle
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//
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Status = CoreHandleProtocol(
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DriverBindingHandle,
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&gEfiDriverBindingProtocolGuid,
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(VOID **) &DriverBinding
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);
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//
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// If DriverBindingHandle does not support the Driver Binding Protocol then return
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//
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if (EFI_ERROR (Status) || DriverBinding == NULL) {
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return;
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}
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//
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// See if DriverBinding is already in the sorted list
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//
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for (Index = 0; Index < *NumberOfSortedDriverBindingProtocols && Index < DriverBindingHandleCount; Index++) {
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if (DriverBinding == SortedDriverBindingProtocols[Index]) {
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return;
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}
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}
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//
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// Add DriverBinding to the end of the list
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//
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if (*NumberOfSortedDriverBindingProtocols < DriverBindingHandleCount) {
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SortedDriverBindingProtocols[*NumberOfSortedDriverBindingProtocols] = DriverBinding;
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}
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*NumberOfSortedDriverBindingProtocols = *NumberOfSortedDriverBindingProtocols + 1;
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//
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// Mark the cooresponding handle in DriverBindingHandleBuffer as used
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//
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for (Index = 0; Index < DriverBindingHandleCount; Index++) {
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if (DriverBindingHandleBuffer[Index] == DriverBindingHandle) {
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DriverBindingHandleBuffer[Index] = NULL;
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}
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}
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}
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/**
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Connects a controller to a driver.
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@param ControllerHandle Handle of the controller to be
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connected.
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@param ContextDriverImageHandles DriverImageHandle A pointer to an
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ordered list of driver image
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handles.
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@param RemainingDevicePath RemainingDevicePath A pointer to
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the device path that specifies a
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child of the controller
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specified by ControllerHandle.
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@retval EFI_SUCCESS One or more drivers were
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connected to ControllerHandle.
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@retval EFI_OUT_OF_RESOURCES No enough system resources to
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complete the request.
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@retval EFI_NOT_FOUND No drivers were connected to
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ControllerHandle.
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**/
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EFI_STATUS
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CoreConnectSingleController (
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IN EFI_HANDLE ControllerHandle,
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IN EFI_HANDLE *ContextDriverImageHandles OPTIONAL,
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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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UINTN Index;
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EFI_HANDLE DriverImageHandle;
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EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL *PlatformDriverOverride;
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EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_PROTOCOL *BusSpecificDriverOverride;
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UINTN DriverBindingHandleCount;
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EFI_HANDLE *DriverBindingHandleBuffer;
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UINTN NewDriverBindingHandleCount;
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EFI_HANDLE *NewDriverBindingHandleBuffer;
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EFI_DRIVER_BINDING_PROTOCOL *DriverBinding;
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EFI_DRIVER_FAMILY_OVERRIDE_PROTOCOL *DriverFamilyOverride;
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UINTN NumberOfSortedDriverBindingProtocols;
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EFI_DRIVER_BINDING_PROTOCOL **SortedDriverBindingProtocols;
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UINT32 DriverFamilyOverrideVersion;
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UINT32 HighestVersion;
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UINTN HighestIndex;
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UINTN SortIndex;
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BOOLEAN OneStarted;
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BOOLEAN DriverFound;
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//
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// Initialize local variables
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//
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DriverBindingHandleCount = 0;
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DriverBindingHandleBuffer = NULL;
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NumberOfSortedDriverBindingProtocols = 0;
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SortedDriverBindingProtocols = NULL;
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PlatformDriverOverride = NULL;
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NewDriverBindingHandleBuffer = NULL;
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//
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// Get list of all Driver Binding Protocol Instances
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//
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Status = CoreLocateHandleBuffer (
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ByProtocol,
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&gEfiDriverBindingProtocolGuid,
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NULL,
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&DriverBindingHandleCount,
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&DriverBindingHandleBuffer
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);
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if (EFI_ERROR (Status) || (DriverBindingHandleCount == 0)) {
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return EFI_NOT_FOUND;
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}
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//
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// Allocate a duplicate array for the sorted Driver Binding Protocol Instances
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//
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SortedDriverBindingProtocols = AllocatePool (sizeof (VOID *) * DriverBindingHandleCount);
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if (SortedDriverBindingProtocols == NULL) {
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CoreFreePool (DriverBindingHandleBuffer);
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return EFI_OUT_OF_RESOURCES;
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}
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//
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// Add Driver Binding Protocols from Context Driver Image Handles first
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//
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if (ContextDriverImageHandles != NULL) {
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for (Index = 0; ContextDriverImageHandles[Index] != NULL; Index++) {
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AddSortedDriverBindingProtocol (
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ContextDriverImageHandles[Index],
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&NumberOfSortedDriverBindingProtocols,
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SortedDriverBindingProtocols,
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DriverBindingHandleCount,
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DriverBindingHandleBuffer,
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FALSE
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);
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}
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}
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//
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// Add the Platform Driver Override Protocol drivers for ControllerHandle next
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//
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Status = CoreLocateProtocol (
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&gEfiPlatformDriverOverrideProtocolGuid,
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NULL,
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(VOID **) &PlatformDriverOverride
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);
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if (!EFI_ERROR (Status) && (PlatformDriverOverride != NULL)) {
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DriverImageHandle = NULL;
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do {
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Status = PlatformDriverOverride->GetDriver (
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PlatformDriverOverride,
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ControllerHandle,
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&DriverImageHandle
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);
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if (!EFI_ERROR (Status)) {
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AddSortedDriverBindingProtocol (
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DriverImageHandle,
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&NumberOfSortedDriverBindingProtocols,
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SortedDriverBindingProtocols,
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DriverBindingHandleCount,
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DriverBindingHandleBuffer,
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TRUE
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);
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}
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} while (!EFI_ERROR (Status));
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}
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//
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// Add the Driver Family Override Protocol drivers for ControllerHandle
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//
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while (TRUE) {
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HighestIndex = DriverBindingHandleCount;
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HighestVersion = 0;
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for (Index = 0; Index < DriverBindingHandleCount; Index++) {
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Status = CoreHandleProtocol (
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DriverBindingHandleBuffer[Index],
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&gEfiDriverFamilyOverrideProtocolGuid,
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(VOID **) &DriverFamilyOverride
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);
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if (!EFI_ERROR (Status) && (DriverFamilyOverride != NULL)) {
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DriverFamilyOverrideVersion = DriverFamilyOverride->GetVersion (DriverFamilyOverride);
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if ((HighestIndex == DriverBindingHandleCount) || (DriverFamilyOverrideVersion > HighestVersion)) {
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HighestVersion = DriverFamilyOverrideVersion;
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HighestIndex = Index;
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}
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}
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}
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if (HighestIndex == DriverBindingHandleCount) {
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break;
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}
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AddSortedDriverBindingProtocol (
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DriverBindingHandleBuffer[HighestIndex],
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&NumberOfSortedDriverBindingProtocols,
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SortedDriverBindingProtocols,
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DriverBindingHandleCount,
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DriverBindingHandleBuffer,
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FALSE
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);
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}
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//
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// Get the Bus Specific Driver Override Protocol instance on the Controller Handle
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//
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Status = CoreHandleProtocol (
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ControllerHandle,
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&gEfiBusSpecificDriverOverrideProtocolGuid,
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(VOID **) &BusSpecificDriverOverride
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);
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if (!EFI_ERROR (Status) && (BusSpecificDriverOverride != NULL)) {
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DriverImageHandle = NULL;
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do {
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Status = BusSpecificDriverOverride->GetDriver (
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BusSpecificDriverOverride,
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&DriverImageHandle
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);
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if (!EFI_ERROR (Status)) {
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AddSortedDriverBindingProtocol (
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DriverImageHandle,
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&NumberOfSortedDriverBindingProtocols,
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SortedDriverBindingProtocols,
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DriverBindingHandleCount,
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DriverBindingHandleBuffer,
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TRUE
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);
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}
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} while (!EFI_ERROR (Status));
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}
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|
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//
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// Then add all the remaining Driver Binding Protocols
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//
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SortIndex = NumberOfSortedDriverBindingProtocols;
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for (Index = 0; Index < DriverBindingHandleCount; Index++) {
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AddSortedDriverBindingProtocol (
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DriverBindingHandleBuffer[Index],
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&NumberOfSortedDriverBindingProtocols,
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SortedDriverBindingProtocols,
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DriverBindingHandleCount,
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DriverBindingHandleBuffer,
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FALSE
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);
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}
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|
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//
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// Free the Driver Binding Handle Buffer
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//
|
|
CoreFreePool (DriverBindingHandleBuffer);
|
|
|
|
//
|
|
// If the number of Driver Binding Protocols has increased since this function started, then return
|
|
// EFI_NOT_READY, so it will be restarted
|
|
//
|
|
Status = CoreLocateHandleBuffer (
|
|
ByProtocol,
|
|
&gEfiDriverBindingProtocolGuid,
|
|
NULL,
|
|
&NewDriverBindingHandleCount,
|
|
&NewDriverBindingHandleBuffer
|
|
);
|
|
CoreFreePool (NewDriverBindingHandleBuffer);
|
|
if (NewDriverBindingHandleCount > DriverBindingHandleCount) {
|
|
//
|
|
// Free any buffers that were allocated with AllocatePool()
|
|
//
|
|
CoreFreePool (SortedDriverBindingProtocols);
|
|
|
|
return EFI_NOT_READY;
|
|
}
|
|
|
|
//
|
|
// Sort the remaining DriverBinding Protocol based on their Version field from
|
|
// highest to lowest.
|
|
//
|
|
for ( ; SortIndex < NumberOfSortedDriverBindingProtocols; SortIndex++) {
|
|
HighestVersion = SortedDriverBindingProtocols[SortIndex]->Version;
|
|
HighestIndex = SortIndex;
|
|
for (Index = SortIndex + 1; Index < NumberOfSortedDriverBindingProtocols; Index++) {
|
|
if (SortedDriverBindingProtocols[Index]->Version > HighestVersion) {
|
|
HighestVersion = SortedDriverBindingProtocols[Index]->Version;
|
|
HighestIndex = Index;
|
|
}
|
|
}
|
|
if (SortIndex != HighestIndex) {
|
|
DriverBinding = SortedDriverBindingProtocols[SortIndex];
|
|
SortedDriverBindingProtocols[SortIndex] = SortedDriverBindingProtocols[HighestIndex];
|
|
SortedDriverBindingProtocols[HighestIndex] = DriverBinding;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Loop until no more drivers can be started on ControllerHandle
|
|
//
|
|
OneStarted = FALSE;
|
|
do {
|
|
|
|
//
|
|
// Loop through the sorted Driver Binding Protocol Instances in order, and see if
|
|
// any of the Driver Binding Protocols support the controller specified by
|
|
// ControllerHandle.
|
|
//
|
|
DriverBinding = NULL;
|
|
DriverFound = FALSE;
|
|
for (Index = 0; (Index < NumberOfSortedDriverBindingProtocols) && !DriverFound; Index++) {
|
|
if (SortedDriverBindingProtocols[Index] != NULL) {
|
|
DriverBinding = SortedDriverBindingProtocols[Index];
|
|
PERF_DRIVER_BINDING_SUPPORT_BEGIN (DriverBinding->DriverBindingHandle, ControllerHandle);
|
|
Status = DriverBinding->Supported(
|
|
DriverBinding,
|
|
ControllerHandle,
|
|
RemainingDevicePath
|
|
);
|
|
PERF_DRIVER_BINDING_SUPPORT_END (DriverBinding->DriverBindingHandle, ControllerHandle);
|
|
if (!EFI_ERROR (Status)) {
|
|
SortedDriverBindingProtocols[Index] = NULL;
|
|
DriverFound = TRUE;
|
|
|
|
//
|
|
// A driver was found that supports ControllerHandle, so attempt to start the driver
|
|
// on ControllerHandle.
|
|
//
|
|
PERF_DRIVER_BINDING_START_BEGIN (DriverBinding->DriverBindingHandle, ControllerHandle);
|
|
Status = DriverBinding->Start (
|
|
DriverBinding,
|
|
ControllerHandle,
|
|
RemainingDevicePath
|
|
);
|
|
PERF_DRIVER_BINDING_START_END (DriverBinding->DriverBindingHandle, ControllerHandle);
|
|
|
|
if (!EFI_ERROR (Status)) {
|
|
//
|
|
// The driver was successfully started on ControllerHandle, so set a flag
|
|
//
|
|
OneStarted = TRUE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} while (DriverFound);
|
|
|
|
//
|
|
// Free any buffers that were allocated with AllocatePool()
|
|
//
|
|
CoreFreePool (SortedDriverBindingProtocols);
|
|
|
|
//
|
|
// If at least one driver was started on ControllerHandle, then return EFI_SUCCESS.
|
|
//
|
|
if (OneStarted) {
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
//
|
|
// If no drivers started and RemainingDevicePath is an End Device Path Node, then return EFI_SUCCESS
|
|
//
|
|
if (RemainingDevicePath != NULL) {
|
|
if (IsDevicePathEnd (RemainingDevicePath)) {
|
|
return EFI_SUCCESS;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Otherwise, no drivers were started on ControllerHandle, so return EFI_NOT_FOUND
|
|
//
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
Disonnects a controller from a driver
|
|
|
|
@param ControllerHandle ControllerHandle The handle of
|
|
the controller from which
|
|
driver(s) are to be
|
|
disconnected.
|
|
@param DriverImageHandle DriverImageHandle The driver to
|
|
disconnect from ControllerHandle.
|
|
@param ChildHandle ChildHandle The handle of the
|
|
child to destroy.
|
|
|
|
@retval EFI_SUCCESS One or more drivers were
|
|
disconnected from the controller.
|
|
@retval EFI_SUCCESS On entry, no drivers are managing
|
|
ControllerHandle.
|
|
@retval EFI_SUCCESS DriverImageHandle is not NULL,
|
|
and on entry DriverImageHandle is
|
|
not managing ControllerHandle.
|
|
@retval EFI_INVALID_PARAMETER ControllerHandle is NULL.
|
|
@retval EFI_INVALID_PARAMETER DriverImageHandle is not NULL,
|
|
and it is not a valid EFI_HANDLE.
|
|
@retval EFI_INVALID_PARAMETER ChildHandle is not NULL, and it
|
|
is not a valid EFI_HANDLE.
|
|
@retval EFI_OUT_OF_RESOURCES There are not enough resources
|
|
available to disconnect any
|
|
drivers from ControllerHandle.
|
|
@retval EFI_DEVICE_ERROR The controller could not be
|
|
disconnected because of a device
|
|
error.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
CoreDisconnectController (
|
|
IN EFI_HANDLE ControllerHandle,
|
|
IN EFI_HANDLE DriverImageHandle OPTIONAL,
|
|
IN EFI_HANDLE ChildHandle OPTIONAL
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
IHANDLE *Handle;
|
|
EFI_HANDLE *DriverImageHandleBuffer;
|
|
EFI_HANDLE *ChildBuffer;
|
|
UINTN Index;
|
|
UINTN HandleIndex;
|
|
UINTN DriverImageHandleCount;
|
|
UINTN ChildrenToStop;
|
|
UINTN ChildBufferCount;
|
|
UINTN StopCount;
|
|
BOOLEAN Duplicate;
|
|
BOOLEAN ChildHandleValid;
|
|
BOOLEAN DriverImageHandleValid;
|
|
LIST_ENTRY *Link;
|
|
LIST_ENTRY *ProtLink;
|
|
OPEN_PROTOCOL_DATA *OpenData;
|
|
PROTOCOL_INTERFACE *Prot;
|
|
EFI_DRIVER_BINDING_PROTOCOL *DriverBinding;
|
|
|
|
//
|
|
// Make sure ControllerHandle is valid
|
|
//
|
|
Status = CoreValidateHandle (ControllerHandle);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
//
|
|
// Make sure ChildHandle is valid if it is not NULL
|
|
//
|
|
if (ChildHandle != NULL) {
|
|
Status = CoreValidateHandle (ChildHandle);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
Handle = ControllerHandle;
|
|
|
|
//
|
|
// Get list of drivers that are currently managing ControllerHandle
|
|
//
|
|
DriverImageHandleBuffer = NULL;
|
|
DriverImageHandleCount = 1;
|
|
|
|
if (DriverImageHandle == NULL) {
|
|
//
|
|
// Look at each protocol interface for a match
|
|
//
|
|
DriverImageHandleCount = 0;
|
|
|
|
CoreAcquireProtocolLock ();
|
|
for (Link = Handle->Protocols.ForwardLink; Link != &Handle->Protocols; Link = Link->ForwardLink) {
|
|
Prot = CR(Link, PROTOCOL_INTERFACE, Link, PROTOCOL_INTERFACE_SIGNATURE);
|
|
for (ProtLink = Prot->OpenList.ForwardLink;
|
|
ProtLink != &Prot->OpenList;
|
|
ProtLink = ProtLink->ForwardLink) {
|
|
OpenData = CR (ProtLink, OPEN_PROTOCOL_DATA, Link, OPEN_PROTOCOL_DATA_SIGNATURE);
|
|
if ((OpenData->Attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) != 0) {
|
|
DriverImageHandleCount++;
|
|
}
|
|
}
|
|
}
|
|
CoreReleaseProtocolLock ();
|
|
|
|
//
|
|
// If there are no drivers managing this controller, then return EFI_SUCCESS
|
|
//
|
|
if (DriverImageHandleCount == 0) {
|
|
Status = EFI_SUCCESS;
|
|
goto Done;
|
|
}
|
|
|
|
DriverImageHandleBuffer = AllocatePool (sizeof (EFI_HANDLE) * DriverImageHandleCount);
|
|
if (DriverImageHandleBuffer == NULL) {
|
|
Status = EFI_OUT_OF_RESOURCES;
|
|
goto Done;
|
|
}
|
|
|
|
DriverImageHandleCount = 0;
|
|
|
|
CoreAcquireProtocolLock ();
|
|
for (Link = Handle->Protocols.ForwardLink; Link != &Handle->Protocols; Link = Link->ForwardLink) {
|
|
Prot = CR(Link, PROTOCOL_INTERFACE, Link, PROTOCOL_INTERFACE_SIGNATURE);
|
|
for (ProtLink = Prot->OpenList.ForwardLink;
|
|
ProtLink != &Prot->OpenList;
|
|
ProtLink = ProtLink->ForwardLink) {
|
|
OpenData = CR (ProtLink, OPEN_PROTOCOL_DATA, Link, OPEN_PROTOCOL_DATA_SIGNATURE);
|
|
if ((OpenData->Attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) != 0) {
|
|
Duplicate = FALSE;
|
|
for (Index = 0; Index< DriverImageHandleCount; Index++) {
|
|
if (DriverImageHandleBuffer[Index] == OpenData->AgentHandle) {
|
|
Duplicate = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
if (!Duplicate) {
|
|
DriverImageHandleBuffer[DriverImageHandleCount] = OpenData->AgentHandle;
|
|
DriverImageHandleCount++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
CoreReleaseProtocolLock ();
|
|
}
|
|
|
|
StopCount = 0;
|
|
for (HandleIndex = 0; HandleIndex < DriverImageHandleCount; HandleIndex++) {
|
|
|
|
if (DriverImageHandleBuffer != NULL) {
|
|
DriverImageHandle = DriverImageHandleBuffer[HandleIndex];
|
|
}
|
|
|
|
//
|
|
// Get the Driver Binding Protocol of the driver that is managing this controller
|
|
//
|
|
Status = CoreHandleProtocol (
|
|
DriverImageHandle,
|
|
&gEfiDriverBindingProtocolGuid,
|
|
(VOID **)&DriverBinding
|
|
);
|
|
if (EFI_ERROR (Status) || DriverBinding == NULL) {
|
|
Status = EFI_INVALID_PARAMETER;
|
|
goto Done;
|
|
}
|
|
|
|
//
|
|
// Look at each protocol interface for a match
|
|
//
|
|
DriverImageHandleValid = FALSE;
|
|
ChildBufferCount = 0;
|
|
|
|
CoreAcquireProtocolLock ();
|
|
for (Link = Handle->Protocols.ForwardLink; Link != &Handle->Protocols; Link = Link->ForwardLink) {
|
|
Prot = CR(Link, PROTOCOL_INTERFACE, Link, PROTOCOL_INTERFACE_SIGNATURE);
|
|
for (ProtLink = Prot->OpenList.ForwardLink;
|
|
ProtLink != &Prot->OpenList;
|
|
ProtLink = ProtLink->ForwardLink) {
|
|
OpenData = CR (ProtLink, OPEN_PROTOCOL_DATA, Link, OPEN_PROTOCOL_DATA_SIGNATURE);
|
|
if (OpenData->AgentHandle == DriverImageHandle) {
|
|
if ((OpenData->Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) != 0) {
|
|
ChildBufferCount++;
|
|
}
|
|
if ((OpenData->Attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) != 0) {
|
|
DriverImageHandleValid = TRUE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
CoreReleaseProtocolLock ();
|
|
|
|
if (DriverImageHandleValid) {
|
|
ChildHandleValid = FALSE;
|
|
ChildBuffer = NULL;
|
|
if (ChildBufferCount != 0) {
|
|
ChildBuffer = AllocatePool (sizeof (EFI_HANDLE) * ChildBufferCount);
|
|
if (ChildBuffer == NULL) {
|
|
Status = EFI_OUT_OF_RESOURCES;
|
|
goto Done;
|
|
}
|
|
|
|
ChildBufferCount = 0;
|
|
|
|
CoreAcquireProtocolLock ();
|
|
for (Link = Handle->Protocols.ForwardLink; Link != &Handle->Protocols; Link = Link->ForwardLink) {
|
|
Prot = CR(Link, PROTOCOL_INTERFACE, Link, PROTOCOL_INTERFACE_SIGNATURE);
|
|
for (ProtLink = Prot->OpenList.ForwardLink;
|
|
ProtLink != &Prot->OpenList;
|
|
ProtLink = ProtLink->ForwardLink) {
|
|
OpenData = CR (ProtLink, OPEN_PROTOCOL_DATA, Link, OPEN_PROTOCOL_DATA_SIGNATURE);
|
|
if ((OpenData->AgentHandle == DriverImageHandle) &&
|
|
((OpenData->Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) != 0)) {
|
|
Duplicate = FALSE;
|
|
for (Index = 0; Index < ChildBufferCount; Index++) {
|
|
if (ChildBuffer[Index] == OpenData->ControllerHandle) {
|
|
Duplicate = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
if (!Duplicate) {
|
|
ChildBuffer[ChildBufferCount] = OpenData->ControllerHandle;
|
|
if (ChildHandle == ChildBuffer[ChildBufferCount]) {
|
|
ChildHandleValid = TRUE;
|
|
}
|
|
ChildBufferCount++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
CoreReleaseProtocolLock ();
|
|
}
|
|
|
|
if (ChildHandle == NULL || ChildHandleValid) {
|
|
ChildrenToStop = 0;
|
|
Status = EFI_SUCCESS;
|
|
if (ChildBufferCount > 0) {
|
|
if (ChildHandle != NULL) {
|
|
ChildrenToStop = 1;
|
|
Status = DriverBinding->Stop (DriverBinding, ControllerHandle, ChildrenToStop, &ChildHandle);
|
|
} else {
|
|
ChildrenToStop = ChildBufferCount;
|
|
Status = DriverBinding->Stop (DriverBinding, ControllerHandle, ChildrenToStop, ChildBuffer);
|
|
}
|
|
}
|
|
if (!EFI_ERROR (Status) && ((ChildHandle == NULL) || (ChildBufferCount == ChildrenToStop))) {
|
|
Status = DriverBinding->Stop (DriverBinding, ControllerHandle, 0, NULL);
|
|
}
|
|
if (!EFI_ERROR (Status)) {
|
|
StopCount++;
|
|
}
|
|
}
|
|
|
|
if (ChildBuffer != NULL) {
|
|
CoreFreePool (ChildBuffer);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (StopCount > 0) {
|
|
Status = EFI_SUCCESS;
|
|
} else {
|
|
Status = EFI_NOT_FOUND;
|
|
}
|
|
|
|
Done:
|
|
|
|
if (DriverImageHandleBuffer != NULL) {
|
|
CoreFreePool (DriverImageHandleBuffer);
|
|
}
|
|
|
|
return Status;
|
|
}
|