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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5483 6f19259b-4bc3-4df7-8a09-765794883524
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vanjeff
2008-07-16 02:56:01 +00:00
parent 03417d8d31
commit 50d4169602
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310
IntelFrameworkModulePkg/Bus/Pci/PciBusDxe/PciBus.c Normal file
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/**@file
Driver Binding functions for PCI bus module.
Copyright (c) 2006, Intel Corporation
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 "Pcibus.h"
//
// PCI Bus Driver Global Variables
//
EFI_DRIVER_BINDING_PROTOCOL gPciBusDriverBinding = {
PciBusDriverBindingSupported,
PciBusDriverBindingStart,
PciBusDriverBindingStop,
0xa,
NULL,
NULL
};
EFI_INCOMPATIBLE_PCI_DEVICE_SUPPORT_PROTOCOL *gEfiIncompatiblePciDeviceSupport = NULL;
EFI_HANDLE gPciHostBrigeHandles[PCI_MAX_HOST_BRIDGE_NUM];
UINTN gPciHostBridgeNumber;
BOOLEAN gFullEnumeration;
UINT64 gAllOne = 0xFFFFFFFFFFFFFFFFULL;
UINT64 gAllZero = 0;
EFI_PCI_PLATFORM_PROTOCOL *gPciPlatformProtocol;
//
// PCI Bus Driver Support Functions
//
/**
Initialize the global variables
publish the driver binding protocol
@param[IN] ImageHandle,
@param[IN] *SystemTable
@retval status of installing driver binding component name protocol.
**/
EFI_STATUS
EFIAPI
PciBusEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
InitializePciDevicePool ();
gFullEnumeration = TRUE;
gPciHostBridgeNumber = 0;
//
// Install driver model protocol(s).
//
Status = EfiLibInstallDriverBindingComponentName2 (
ImageHandle,
SystemTable,
&gPciBusDriverBinding,
ImageHandle,
&gPciBusComponentName,
&gPciBusComponentName2
);
ASSERT_EFI_ERROR (Status);
InstallHotPlugRequestProtocol (&Status);
return Status;
}
/**
Test to see if this driver supports ControllerHandle. Any ControllerHandle
than contains a gEfiPciRootBridgeIoProtocolGuid protocol can be supported.
@param This Protocol instance pointer.
@param ControllerHandle Handle of device to test
@param RemainingDevicePath Optional parameter use to pick a specific child
device to start.
@retval EFI_SUCCESS This driver supports this device
@retval EFI_ALREADY_STARTED This driver is already running on this device
@retval other This driver does not support this device
**/
EFI_STATUS
EFIAPI
PciBusDriverBindingSupported (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
{
EFI_STATUS Status;
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;
EFI_DEV_PATH_PTR Node;
if (RemainingDevicePath != NULL) {
Node.DevPath = RemainingDevicePath;
if (Node.DevPath->Type != HARDWARE_DEVICE_PATH ||
Node.DevPath->SubType != HW_PCI_DP ||
DevicePathNodeLength(Node.DevPath) != sizeof(PCI_DEVICE_PATH)) {
return EFI_UNSUPPORTED;
}
}
//
// Open the IO Abstraction(s) needed to perform the supported test
//
Status = gBS->OpenProtocol (
Controller,
&gEfiDevicePathProtocolGuid,
(VOID **) &ParentDevicePath,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (Status == EFI_ALREADY_STARTED) {
return EFI_SUCCESS;
}
if (EFI_ERROR (Status)) {
return Status;
}
gBS->CloseProtocol (
Controller,
&gEfiDevicePathProtocolGuid,
This->DriverBindingHandle,
Controller
);
Status = gBS->OpenProtocol (
Controller,
&gEfiPciRootBridgeIoProtocolGuid,
(VOID **) &PciRootBridgeIo,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (Status == EFI_ALREADY_STARTED) {
return EFI_SUCCESS;
}
if (EFI_ERROR (Status)) {
return Status;
}
gBS->CloseProtocol (
Controller,
&gEfiPciRootBridgeIoProtocolGuid,
This->DriverBindingHandle,
Controller
);
return EFI_SUCCESS;
}
/**
Start this driver on ControllerHandle and enumerate Pci bus and start
all device under PCI bus.
@param This Protocol instance pointer.
@param ControllerHandle Handle of device to bind driver to
@param RemainingDevicePath Optional parameter use to pick a specific child
device to start.
@retval EFI_SUCCESS This driver is added to ControllerHandle
@retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle
@retval other This driver does not support this device
**/
EFI_STATUS
EFIAPI
PciBusDriverBindingStart (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
{
EFI_STATUS Status;
Status = gBS->LocateProtocol (
&gEfiIncompatiblePciDeviceSupportProtocolGuid,
NULL,
(VOID **) &gEfiIncompatiblePciDeviceSupport
);
//
// If PCI Platform protocol is available, get it now.
// If the platform implements this, it must be installed before BDS phase
//
gPciPlatformProtocol = NULL;
gBS->LocateProtocol (
&gEfiPciPlatformProtocolGuid,
NULL,
(VOID **) &gPciPlatformProtocol
);
gFullEnumeration = (BOOLEAN) ((SearchHostBridgeHandle (Controller) ? FALSE : TRUE));
//
// Enumerate the entire host bridge
// After enumeration, a database that records all the device information will be created
//
//
Status = PciEnumerator (Controller);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Start all the devices under the entire host bridge.
//
StartPciDevices (Controller);
return EFI_SUCCESS;
}
/**
Stop this driver on ControllerHandle. Support stoping any child handles
created by this driver.
@param This Protocol instance pointer.
@param ControllerHandle Handle of device to stop driver on
@param NumberOfChildren Number of Handles in ChildHandleBuffer. If number of
children is zero stop the entire bus driver.
@param ChildHandleBuffer List of Child Handles to Stop.
@retval EFI_SUCCESS This driver is removed ControllerHandle
@retval other This driver was not removed from this device
**/
EFI_STATUS
EFIAPI
PciBusDriverBindingStop (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer
)
{
EFI_STATUS Status;
UINTN Index;
BOOLEAN AllChildrenStopped;
if (NumberOfChildren == 0) {
//
// Close the bus driver
//
gBS->CloseProtocol (
Controller,
&gEfiDevicePathProtocolGuid,
This->DriverBindingHandle,
Controller
);
gBS->CloseProtocol (
Controller,
&gEfiPciRootBridgeIoProtocolGuid,
This->DriverBindingHandle,
Controller
);
DestroyRootBridgeByHandle (
Controller
);
return EFI_SUCCESS;
}
//
// Stop all the children
//
AllChildrenStopped = TRUE;
for (Index = 0; Index < NumberOfChildren; Index++) {
//
// De register all the pci device
//
Status = DeRegisterPciDevice (Controller, ChildHandleBuffer[Index]);
if (EFI_ERROR (Status)) {
AllChildrenStopped = FALSE;
}
}
if (!AllChildrenStopped) {
return EFI_DEVICE_ERROR;
}
return EFI_SUCCESS;
}