EFI_STATUS
EFIAPI
PciBusDriverBindingStart (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
/*++
Routine Description:
Start to management the controller passed in
Arguments:
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
Returns:
--*/
{
EFI_STATUS Status;
//
// 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;
}
//
// Enable PCI device specified by remaining device path. BDS or other driver can call the
// start more than once.
//
StartPciDevices (Controller, RemainingDevicePath);
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
PciBusDriverBindingStart (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
/*++
Routine Description:
Start to management the controller passed in
Arguments:
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
Returns:
--*/
{
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;
}
/**
Start this driver on ControllerHandle and enumerate Pci bus and start
all device under PCI bus.
@param This Protocol instance pointer.
@param Controller 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;
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;
//
// Initialize PciRootBridgeIo to suppress incorrect compiler warning.
//
PciRootBridgeIo = NULL;
//
// Check RemainingDevicePath validation
//
if (RemainingDevicePath != NULL) {
//
// Check if RemainingDevicePath is the End of Device Path Node,
// if yes, return EFI_SUCCESS
//
if (IsDevicePathEnd (RemainingDevicePath)) {
return EFI_SUCCESS;
}
}
gBS->LocateProtocol (
&gEfiIncompatiblePciDeviceSupportProtocolGuid,
NULL,
(VOID **) &gIncompatiblePciDeviceSupport
);
//
// 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
);
//
// If PCI Platform protocol doesn't exist, try to Pci Override Protocol.
//
if (gPciPlatformProtocol == NULL) {
gPciOverrideProtocol = NULL;
gBS->LocateProtocol (
&gEfiPciOverrideProtocolGuid,
NULL,
(VOID **) &gPciOverrideProtocol
);
}
if (mIoMmuProtocol == NULL) {
gBS->LocateProtocol (
&gEdkiiIoMmuProtocolGuid,
NULL,
(VOID **) &mIoMmuProtocol
);
}
if (PcdGetBool (PcdPciDisableBusEnumeration)) {
gFullEnumeration = FALSE;
} else {
gFullEnumeration = (BOOLEAN) ((SearchHostBridgeHandle (Controller) ? FALSE : TRUE));
}
//
// Open Device Path Protocol for PCI root bridge
//
Status = gBS->OpenProtocol (
Controller,
&gEfiDevicePathProtocolGuid,
(VOID **) &ParentDevicePath,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
ASSERT_EFI_ERROR (Status);
//
// Report Status Code to indicate PCI bus starts
//
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_PROGRESS_CODE,
(EFI_IO_BUS_PCI | EFI_IOB_PC_INIT),
ParentDevicePath
);
Status = EFI_SUCCESS;
//
// Enumerate the entire host bridge
// After enumeration, a database that records all the device information will be created
//
//
if (gFullEnumeration) {
//
// Get the rootbridge Io protocol to find the host bridge handle
//
Status = gBS->OpenProtocol (
Controller,
&gEfiPciRootBridgeIoProtocolGuid,
(VOID **) &PciRootBridgeIo,
gPciBusDriverBinding.DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (!EFI_ERROR (Status)) {
Status = PciEnumerator (Controller, PciRootBridgeIo->ParentHandle);
}
} else {
//
// If PCI bus has already done the full enumeration, never do it again
//
Status = PciEnumeratorLight (Controller);
}
if (EFI_ERROR (Status)) {
return Status;
}
//
// Start all the devices under the entire host bridge.
//
StartPciDevices (Controller);
if (gFullEnumeration) {
gFullEnumeration = FALSE;
Status = gBS->InstallProtocolInterface (
&PciRootBridgeIo->ParentHandle,
&gEfiPciEnumerationCompleteProtocolGuid,
EFI_NATIVE_INTERFACE,
NULL
);
ASSERT_EFI_ERROR (Status);
}
return Status;
}
/**
Start this driver on ControllerHandle and enumerate Pci bus and start
all device under PCI bus.
@param This Protocol instance pointer.
@param Controller 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;
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
//
// Check RemainingDevicePath validation
//
if (RemainingDevicePath != NULL) {
//
// Check if RemainingDevicePath is the End of Device Path Node,
// if yes, return EFI_SUCCESS
//
if (IsDevicePathEnd (RemainingDevicePath)) {
return EFI_SUCCESS;
}
}
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
);
//
// If PCI Platform protocol doesn't exist, try to Pci Override Protocol.
//
if (gPciPlatformProtocol == NULL) {
gPciOverrideProtocol = NULL;
gBS->LocateProtocol (
&gEfiPciOverrideProtocolGuid,
NULL,
(VOID **) &gPciOverrideProtocol
);
}
if (PcdGetBool (PcdPciDisableBusEnumeration)) {
gFullEnumeration = FALSE;
} else {
gFullEnumeration = (BOOLEAN) ((SearchHostBridgeHandle (Controller) ? FALSE : TRUE));
}
//
// Open Device Path Protocol for PCI root bridge
//
Status = gBS->OpenProtocol (
Controller,
&gEfiDevicePathProtocolGuid,
(VOID **) &ParentDevicePath,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
ASSERT_EFI_ERROR (Status);
//
// Report Status Code to indicate PCI bus starts
//
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_PROGRESS_CODE,
(EFI_IO_BUS_PCI | EFI_IOB_PC_INIT),
ParentDevicePath
);
//
// 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;
}
