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audk/MdeModulePkg/Library/GenericBdsLib/BdsConnect.c

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/** @file
BDS Lib functions which relate with connect the device
Copyright (c) 2004 - 2008, Intel Corporation. <BR>
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "InternalBdsLib.h"
/**
This function will connect all the system driver to controller
first, and then special connect the default console, this make
sure all the system controller available and the platform default
console connected.
**/
VOID
EFIAPI
BdsLibConnectAll (
VOID
)
{
//
// Connect the platform console first
//
BdsLibConnectAllDefaultConsoles ();
//
// Generic way to connect all the drivers
//
BdsLibConnectAllDriversToAllControllers ();
//
// Here we have the assumption that we have already had
// platform default console
//
BdsLibConnectAllDefaultConsoles ();
}
/**
This function will connect all the system drivers to all controllers
first, and then connect all the console devices the system current
have. After this we should get all the device work and console available
if the system have console device.
**/
VOID
BdsLibGenericConnectAll (
VOID
)
{
//
// Most generic way to connect all the drivers
//
BdsLibConnectAllDriversToAllControllers ();
BdsLibConnectAllConsoles ();
}
/**
This function will create all handles associate with every device
path node. If the handle associate with one device path node can not
be created success, then still give one chance to do the dispatch,
which load the missing drivers if possible.
@param DevicePathToConnect The device path which will be connected, it can be
a multi-instance device path
@retval EFI_SUCCESS All handles associate with every device path node
have been created
@retval EFI_OUT_OF_RESOURCES There is no resource to create new handles
@retval EFI_NOT_FOUND Create the handle associate with one device path
node failed
**/
EFI_STATUS
EFIAPI
BdsLibConnectDevicePath (
IN EFI_DEVICE_PATH_PROTOCOL *DevicePathToConnect
)
{
EFI_STATUS Status;
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
EFI_DEVICE_PATH_PROTOCOL *CopyOfDevicePath;
EFI_DEVICE_PATH_PROTOCOL *Instance;
EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath;
EFI_DEVICE_PATH_PROTOCOL *Next;
EFI_HANDLE Handle;
EFI_HANDLE PreviousHandle;
UINTN Size;
if (DevicePathToConnect == NULL) {
return EFI_SUCCESS;
}
DevicePath = DuplicateDevicePath (DevicePathToConnect);
CopyOfDevicePath = DevicePath;
if (DevicePath == NULL) {
return EFI_OUT_OF_RESOURCES;
}
do {
//
// The outer loop handles multi instance device paths.
// Only console variables contain multiple instance device paths.
//
// After this call DevicePath points to the next Instance
//
Instance = GetNextDevicePathInstance (&DevicePath, &Size);
Next = Instance;
while (!IsDevicePathEndType (Next)) {
Next = NextDevicePathNode (Next);
}
SetDevicePathEndNode (Next);
//
// Start the real work of connect with RemainingDevicePath
//
PreviousHandle = NULL;
do {
//
// Find the handle that best matches the Device Path. If it is only a
// partial match the remaining part of the device path is returned in
// RemainingDevicePath.
//
RemainingDevicePath = Instance;
Status = gBS->LocateDevicePath (&gEfiDevicePathProtocolGuid, &RemainingDevicePath, &Handle);
if (!EFI_ERROR (Status)) {
if (Handle == PreviousHandle) {
//
// If no forward progress is made try invoking the Dispatcher.
// A new FV may have been added to the system an new drivers
// may now be found.
// Status == EFI_SUCCESS means a driver was dispatched
// Status == EFI_NOT_FOUND means no new drivers were dispatched
//
Status = gDS->Dispatch ();
}
if (!EFI_ERROR (Status)) {
PreviousHandle = Handle;
//
// Connect all drivers that apply to Handle and RemainingDevicePath,
// the Recursive flag is FALSE so only one level will be expanded.
//
// Do not check the connect status here, if the connect controller fail,
// then still give the chance to do dispatch, because partial
// RemainingDevicepath may be in the new FV
//
// 1. If the connect fail, RemainingDevicepath and handle will not
// change, so next time will do the dispatch, then dispatch's status
// will take effect
// 2. If the connect success, the RemainingDevicepath and handle will
// change, then avoid the dispatch, we have chance to continue the
// next connection
//
gBS->ConnectController (Handle, NULL, RemainingDevicePath, FALSE);
}
}
//
// Loop until RemainingDevicePath is an empty device path
//
} while (!EFI_ERROR (Status) && !IsDevicePathEnd (RemainingDevicePath));
} while (DevicePath != NULL);
if (CopyOfDevicePath != NULL) {
FreePool (CopyOfDevicePath);
}
//
// All handle with DevicePath exists in the handle database
//
return Status;
}
/**
This function will connect all current system handles recursively. The
connection will finish until every handle's child handle created if it have.
@retval EFI_SUCCESS All handles and it's child handle have been
connected
@retval EFI_STATUS Return the status of gBS->LocateHandleBuffer().
**/
EFI_STATUS
EFIAPI
BdsLibConnectAllEfi (
VOID
)
{
EFI_STATUS Status;
UINTN HandleCount;
EFI_HANDLE *HandleBuffer;
UINTN Index;
Status = gBS->LocateHandleBuffer (
AllHandles,
NULL,
NULL,
&HandleCount,
&HandleBuffer
);
if (EFI_ERROR (Status)) {
return Status;
}
for (Index = 0; Index < HandleCount; Index++) {
Status = gBS->ConnectController (HandleBuffer[Index], NULL, NULL, TRUE);
}
if (HandleBuffer != NULL) {
FreePool (HandleBuffer);
}
return EFI_SUCCESS;
}
/**
This function will disconnect all current system handles. The disconnection
will finish until every handle have been disconnected.
@retval EFI_SUCCESS All handles have been disconnected
@retval EFI_STATUS Return the status of gBS->LocateHandleBuffer().
**/
EFI_STATUS
EFIAPI
BdsLibDisconnectAllEfi (
VOID
)
{
EFI_STATUS Status;
UINTN HandleCount;
EFI_HANDLE *HandleBuffer;
UINTN Index;
//
// Disconnect all
//
Status = gBS->LocateHandleBuffer (
AllHandles,
NULL,
NULL,
&HandleCount,
&HandleBuffer
);
if (EFI_ERROR (Status)) {
return Status;
}
for (Index = 0; Index < HandleCount; Index++) {
Status = gBS->DisconnectController (HandleBuffer[Index], NULL, NULL);
}
if (HandleBuffer != NULL) {
FreePool (HandleBuffer);
}
return EFI_SUCCESS;
}
/**
Connects all drivers to all controllers.
This function make sure all the current system driver will manage
the correspoinding controllers if have. And at the same time, make
sure all the system controllers have driver to manage it if have.
**/
VOID
EFIAPI
BdsLibConnectAllDriversToAllControllers (
VOID
)
{
EFI_STATUS Status;
do {
//
// Connect All EFI 1.10 drivers following EFI 1.10 algorithm
//
BdsLibConnectAllEfi ();
//
// Check to see if it's possible to dispatch an more DXE drivers.
// The BdsLibConnectAllEfi () may have made new DXE drivers show up.
// If anything is Dispatched Status == EFI_SUCCESS and we will try
// the connect again.
//
Status = gDS->Dispatch ();
} while (!EFI_ERROR (Status));
}
/**
Connect the specific Usb device which match the short form device path,
and whose bus is determined by Host Controller (Uhci or Ehci).
@param HostControllerPI Uhci (0x00) or Ehci (0x20) or Both uhci and ehci
(0xFF)
@param RemainingDevicePath a short-form device path that starts with the first
element being a USB WWID or a USB Class device
path
@return EFI_INVALID_PARAMETER RemainingDevicePath is NULL pointer.
RemainingDevicePath is not a USB device path.
Invalid HostControllerPI type.
@return EFI_SUCCESS Success to connect USB device
@return EFI_NOT_FOUND Fail to find handle for USB controller to connect.
**/
EFI_STATUS
EFIAPI
BdsLibConnectUsbDevByShortFormDP(
IN UINT8 HostControllerPI,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
{
EFI_STATUS Status;
EFI_HANDLE *HandleArray;
UINTN HandleArrayCount;
UINTN Index;
EFI_PCI_IO_PROTOCOL *PciIo;
UINT8 Class[3];
BOOLEAN AtLeastOneConnected;
//
// Check the passed in parameters
//
if (RemainingDevicePath == NULL) {
return EFI_INVALID_PARAMETER;
}
if ((DevicePathType (RemainingDevicePath) != MESSAGING_DEVICE_PATH) ||
((DevicePathSubType (RemainingDevicePath) != MSG_USB_CLASS_DP)
&& (DevicePathSubType (RemainingDevicePath) != MSG_USB_WWID_DP)
)) {
return EFI_INVALID_PARAMETER;
}
if (HostControllerPI != 0xFF &&
HostControllerPI != 0x00 &&
HostControllerPI != 0x20) {
return EFI_INVALID_PARAMETER;
}
//
// Find the usb host controller firstly, then connect with the remaining device path
//
AtLeastOneConnected = FALSE;
Status = gBS->LocateHandleBuffer (
ByProtocol,
&gEfiPciIoProtocolGuid,
NULL,
&HandleArrayCount,
&HandleArray
);
if (!EFI_ERROR (Status)) {
for (Index = 0; Index < HandleArrayCount; Index++) {
Status = gBS->HandleProtocol (
HandleArray[Index],
&gEfiPciIoProtocolGuid,
(VOID **)&PciIo
);
if (!EFI_ERROR (Status)) {
//
// Check whether the Pci device is the wanted usb host controller
//
Status = PciIo->Pci.Read (PciIo, EfiPciIoWidthUint8, 0x09, 3, &Class);
if (!EFI_ERROR (Status)) {
if ((PCI_CLASS_SERIAL == Class[2]) &&
(PCI_CLASS_SERIAL_USB == Class[1])) {
if (HostControllerPI == Class[0] || HostControllerPI == 0xFF) {
Status = gBS->ConnectController (
HandleArray[Index],
NULL,
RemainingDevicePath,
FALSE
);
if (!EFI_ERROR(Status)) {
AtLeastOneConnected = TRUE;
}
}
}
}
}
}
if (AtLeastOneConnected) {
return EFI_SUCCESS;
}
}
return EFI_NOT_FOUND;
}
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