diff options
Diffstat (limited to 'IntelFrameworkModulePkg/Bus/Pci/PciBusDxe/PciDeviceSupport.c')
| -rw-r--r-- | IntelFrameworkModulePkg/Bus/Pci/PciBusDxe/PciDeviceSupport.c | 1351 |
1 files changed, 1351 insertions, 0 deletions
diff --git a/IntelFrameworkModulePkg/Bus/Pci/PciBusDxe/PciDeviceSupport.c b/IntelFrameworkModulePkg/Bus/Pci/PciBusDxe/PciDeviceSupport.c new file mode 100644 index 0000000000..0e95dc1865 --- /dev/null +++ b/IntelFrameworkModulePkg/Bus/Pci/PciBusDxe/PciDeviceSupport.c @@ -0,0 +1,1351 @@ +/*++
+
+Copyright (c) 2006 - 2007, 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.
+
+Module Name:
+
+ PciDeviceSupport.c
+
+Abstract:
+
+ This file provides routine to support Pci device node manipulation
+
+Revision History
+
+--*/
+
+#include "pcibus.h"
+#include "PciDeviceSupport.h"
+
+//
+// This device structure is serviced as a header.
+// Its Next field points to the first root bridge device node
+//
+LIST_ENTRY gPciDevicePool;
+
+EFI_STATUS
+InitializePciDevicePool (
+ VOID
+ )
+/*++
+
+Routine Description:
+
+ Initialize the gPciDevicePool
+
+Arguments:
+
+Returns:
+
+ None
+
+--*/
+// TODO: EFI_SUCCESS - add return value to function comment
+{
+ InitializeListHead (&gPciDevicePool);
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+InsertRootBridge (
+ PCI_IO_DEVICE *RootBridge
+ )
+/*++
+
+Routine Description:
+
+ Insert a root bridge into PCI device pool
+
+Arguments:
+
+ RootBridge - A pointer to the PCI_IO_DEVICE.
+
+Returns:
+
+ None
+
+--*/
+// TODO: EFI_SUCCESS - add return value to function comment
+{
+
+ InsertTailList (&gPciDevicePool, &(RootBridge->Link));
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+InsertPciDevice (
+ PCI_IO_DEVICE *Bridge,
+ PCI_IO_DEVICE *PciDeviceNode
+ )
+/*++
+
+Routine Description:
+
+ This function is used to insert a PCI device node under
+ a bridge
+
+Arguments:
+ Bridge - A pointer to the PCI_IO_DEVICE.
+ PciDeviceNode - A pointer to the PCI_IO_DEVICE.
+
+Returns:
+
+ None
+
+--*/
+// TODO: EFI_SUCCESS - add return value to function comment
+{
+
+ InsertTailList (&Bridge->ChildList, &(PciDeviceNode->Link));
+ PciDeviceNode->Parent = Bridge;
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+DestroyRootBridge (
+ IN PCI_IO_DEVICE *RootBridge
+ )
+/*++
+
+Routine Description:
+
+
+Arguments:
+
+ RootBridge - A pointer to the PCI_IO_DEVICE.
+
+Returns:
+
+ None
+
+--*/
+// TODO: EFI_SUCCESS - add return value to function comment
+{
+ DestroyPciDeviceTree (RootBridge);
+
+ FreePciDevice (RootBridge);
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+FreePciDevice (
+ IN PCI_IO_DEVICE *PciIoDevice
+ )
+/*++
+
+Routine Description:
+
+ Destroy a pci device node.
+ Also all direct or indirect allocated resource for this node will be freed.
+
+Arguments:
+
+ PciIoDevice - A pointer to the PCI_IO_DEVICE.
+
+Returns:
+
+ None
+
+--*/
+// TODO: EFI_SUCCESS - add return value to function comment
+{
+
+ //
+ // Assume all children have been removed underneath this device
+ //
+ if (PciIoDevice->ResourcePaddingDescriptors != NULL) {
+ gBS->FreePool (PciIoDevice->ResourcePaddingDescriptors);
+ }
+
+ if (PciIoDevice->DevicePath != NULL) {
+ gBS->FreePool (PciIoDevice->DevicePath);
+ }
+
+ gBS->FreePool (PciIoDevice);
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+DestroyPciDeviceTree (
+ IN PCI_IO_DEVICE *Bridge
+ )
+/*++
+
+Routine Description:
+
+ Destroy all the pci device node under the bridge.
+ Bridge itself is not included.
+
+Arguments:
+
+ Bridge - A pointer to the PCI_IO_DEVICE.
+
+Returns:
+
+ None
+
+--*/
+// TODO: EFI_SUCCESS - add return value to function comment
+{
+ LIST_ENTRY *CurrentLink;
+ PCI_IO_DEVICE *Temp;
+
+ while (!IsListEmpty (&Bridge->ChildList)) {
+
+ CurrentLink = Bridge->ChildList.ForwardLink;
+
+ //
+ // Remove this node from the linked list
+ //
+ RemoveEntryList (CurrentLink);
+
+ Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
+
+ if (!IsListEmpty (&Temp->ChildList)) {
+ DestroyPciDeviceTree (Temp);
+ }
+
+ FreePciDevice (Temp);
+ }
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+DestroyRootBridgeByHandle (
+ EFI_HANDLE Controller
+ )
+/*++
+
+Routine Description:
+
+ Destroy all device nodes under the root bridge
+ specified by Controller.
+ The root bridge itself is also included.
+
+Arguments:
+
+ Controller - An efi handle.
+
+Returns:
+
+ None
+
+--*/
+// TODO: EFI_SUCCESS - add return value to function comment
+// TODO: EFI_NOT_FOUND - add return value to function comment
+{
+
+ LIST_ENTRY *CurrentLink;
+ PCI_IO_DEVICE *Temp;
+
+ CurrentLink = gPciDevicePool.ForwardLink;
+
+ while (CurrentLink && CurrentLink != &gPciDevicePool) {
+ Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
+
+ if (Temp->Handle == Controller) {
+
+ RemoveEntryList (CurrentLink);
+
+ DestroyPciDeviceTree (Temp);
+
+ FreePciDevice (Temp);
+
+ return EFI_SUCCESS;
+ }
+
+ CurrentLink = CurrentLink->ForwardLink;
+ }
+
+ return EFI_NOT_FOUND;
+}
+
+EFI_STATUS
+RegisterPciDevice (
+ IN EFI_HANDLE Controller,
+ IN PCI_IO_DEVICE *PciIoDevice,
+ OUT EFI_HANDLE *Handle OPTIONAL
+ )
+/*++
+
+Routine Description:
+
+ This function registers the PCI IO device. It creates a handle for this PCI IO device
+ (if the handle does not exist), attaches appropriate protocols onto the handle, does
+ necessary initialization, and sets up parent/child relationship with its bus controller.
+
+Arguments:
+
+ Controller - An EFI handle for the PCI bus controller.
+ PciIoDevice - A PCI_IO_DEVICE pointer to the PCI IO device to be registered.
+ Handle - A pointer to hold the EFI handle for the PCI IO device.
+
+Returns:
+
+ EFI_SUCCESS - The PCI device is successfully registered.
+ Others - An error occurred when registering the PCI device.
+
+--*/
+{
+ EFI_STATUS Status;
+ VOID *PlatformOpRomBuffer;
+ UINTN PlatformOpRomSize;
+ UINT8 PciExpressCapRegOffset;
+ EFI_PCI_IO_PROTOCOL *PciIo;
+ UINT8 Data8;
+
+ //
+ // Install the pciio protocol, device path protocol
+ //
+ Status = gBS->InstallMultipleProtocolInterfaces (
+ &PciIoDevice->Handle,
+ &gEfiDevicePathProtocolGuid,
+ PciIoDevice->DevicePath,
+ &gEfiPciIoProtocolGuid,
+ &PciIoDevice->PciIo,
+ NULL
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Detect if PCI Express Device
+ //
+ PciExpressCapRegOffset = 0;
+ Status = LocateCapabilityRegBlock (
+ PciIoDevice,
+ EFI_PCI_CAPABILITY_ID_PCIEXP,
+ &PciExpressCapRegOffset,
+ NULL
+ );
+ if (!EFI_ERROR (Status)) {
+ PciIoDevice->IsPciExp = TRUE;
+ }
+
+ //
+ // Force Interrupt line to "Unknown" or "No Connection"
+ //
+ PciIo = &(PciIoDevice->PciIo);
+ Data8 = PCI_INT_LINE_UNKNOWN;
+ PciIoWrite (PciIo, EfiPciIoWidthUint8, 0x3C, 1, &Data8);
+
+ //
+ // Process Platform OpRom
+ //
+ if (gPciPlatformProtocol != NULL && !PciIoDevice->AllOpRomProcessed) {
+ PciIoDevice->AllOpRomProcessed = TRUE;
+
+ Status = gPciPlatformProtocol->GetPciRom (
+ gPciPlatformProtocol,
+ PciIoDevice->Handle,
+ &PlatformOpRomBuffer,
+ &PlatformOpRomSize
+ );
+
+ if (!EFI_ERROR (Status)) {
+
+ //
+ // Have Platform OpRom
+ //
+ PciIoDevice->RomSize = PlatformOpRomSize;
+ PciIoDevice->PciIo.RomSize = PlatformOpRomSize;
+ PciIoDevice->PciIo.RomImage = PlatformOpRomBuffer;
+
+ //
+ // Process Image
+ //
+ ProcessOpRomImage (PciIoDevice);
+ }
+ }
+
+ if (PciIoDevice->BusOverride) {
+ //
+ // Install BusSpecificDriverOverride Protocol
+ //
+ Status = gBS->InstallMultipleProtocolInterfaces (
+ &PciIoDevice->Handle,
+ &gEfiBusSpecificDriverOverrideProtocolGuid,
+ &PciIoDevice->PciDriverOverride,
+ NULL
+ );
+ if (EFI_ERROR (Status)) {
+ gBS->UninstallMultipleProtocolInterfaces (
+ &PciIoDevice->Handle,
+ &gEfiDevicePathProtocolGuid,
+ PciIoDevice->DevicePath,
+ &gEfiPciIoProtocolGuid,
+ &PciIoDevice->PciIo,
+ NULL
+ );
+
+ return Status;
+ }
+ }
+
+ Status = gBS->OpenProtocol (
+ Controller,
+ &gEfiPciRootBridgeIoProtocolGuid,
+ (VOID **) &(PciIoDevice->PciRootBridgeIo),
+ gPciBusDriverBinding.DriverBindingHandle,
+ PciIoDevice->Handle,
+ EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Install Pccard Hotplug GUID for Pccard device so that
+ // to notify CardBus driver to stop the device when de-register happens
+ //
+ InstallPciHotplugGuid (PciIoDevice);
+
+ if (Handle != NULL) {
+ *Handle = PciIoDevice->Handle;
+ }
+
+ //
+ // Indicate the pci device is registered
+ //
+ PciIoDevice->Registered = TRUE;
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+RemoveAllPciDeviceOnBridge (
+ EFI_HANDLE RootBridgeHandle,
+ PCI_IO_DEVICE *Bridge
+ )
+/*++
+
+Routine Description:
+
+ This function is used to remove the whole PCI devices from the bridge.
+
+Arguments:
+
+ RootBridgeHandle - An efi handle.
+ Bridge - A pointer to the PCI_IO_DEVICE.
+
+Returns:
+
+ None
+
+--*/
+// TODO: EFI_SUCCESS - add return value to function comment
+{
+
+ LIST_ENTRY *CurrentLink;
+ PCI_IO_DEVICE *Temp;
+
+ while (!IsListEmpty (&Bridge->ChildList)) {
+
+ CurrentLink = Bridge->ChildList.ForwardLink;
+ Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
+
+ //
+ // Check if the current node has been deregistered before
+ // If it is not, then deregister it
+ //
+ if (Temp->Registered) {
+ DeRegisterPciDevice (RootBridgeHandle, Temp->Handle);
+ }
+
+ //
+ // Remove this node from the linked list
+ //
+ RemoveEntryList (CurrentLink);
+
+ if (!IsListEmpty (&Temp->ChildList)) {
+ RemoveAllPciDeviceOnBridge (RootBridgeHandle, Temp);
+ }
+
+ FreePciDevice (Temp);
+ }
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+DeRegisterPciDevice (
+ IN EFI_HANDLE Controller,
+ IN EFI_HANDLE Handle
+ )
+/*++
+
+Routine Description:
+
+ This function is used to de-register the PCI device from the EFI,
+ That includes un-installing PciIo protocol from the specified PCI
+ device handle.
+
+Arguments:
+
+ Controller - An efi handle.
+ Handle - An efi handle.
+
+Returns:
+
+ None
+
+--*/
+// TODO: EFI_SUCCESS - add return value to function comment
+// TODO: EFI_SUCCESS - add return value to function comment
+// TODO: EFI_SUCCESS - add return value to function comment
+{
+ EFI_PCI_IO_PROTOCOL *PciIo;
+ EFI_STATUS Status;
+ PCI_IO_DEVICE *PciIoDevice;
+ PCI_IO_DEVICE *Node;
+ LIST_ENTRY *CurrentLink;
+ EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;
+
+ Status = gBS->OpenProtocol (
+ Handle,
+ &gEfiPciIoProtocolGuid,
+ (VOID **) &PciIo,
+ gPciBusDriverBinding.DriverBindingHandle,
+ Controller,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL
+ );
+ if (!EFI_ERROR (Status)) {
+ PciIoDevice = PCI_IO_DEVICE_FROM_PCI_IO_THIS (PciIo);
+
+ //
+ // If it is already de-registered
+ //
+ if (!PciIoDevice->Registered) {
+ return EFI_SUCCESS;
+ }
+
+ //
+ // If it is PPB, first de-register its children
+ //
+
+ if (!IsListEmpty (&PciIoDevice->ChildList)) {
+
+ CurrentLink = PciIoDevice->ChildList.ForwardLink;
+
+ while (CurrentLink && CurrentLink != &PciIoDevice->ChildList) {
+ Node = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
+ Status = DeRegisterPciDevice (Controller, Node->Handle);
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ CurrentLink = CurrentLink->ForwardLink;
+ }
+ }
+ //
+ // Uninstall Pccard Hotplug GUID for Pccard device
+ //
+ UninstallPciHotplugGuid (PciIoDevice);
+
+ //
+ // Close the child handle
+ //
+ Status = gBS->CloseProtocol (
+ Controller,
+ &gEfiPciRootBridgeIoProtocolGuid,
+ gPciBusDriverBinding.DriverBindingHandle,
+ Handle
+ );
+
+ //
+ // Un-install the device path protocol and pci io protocol
+ //
+ if (PciIoDevice->BusOverride) {
+ Status = gBS->UninstallMultipleProtocolInterfaces (
+ Handle,
+ &gEfiDevicePathProtocolGuid,
+ PciIoDevice->DevicePath,
+ &gEfiPciIoProtocolGuid,
+ &PciIoDevice->PciIo,
+ &gEfiBusSpecificDriverOverrideProtocolGuid,
+ &PciIoDevice->PciDriverOverride,
+ NULL
+ );
+ } else {
+ Status = gBS->UninstallMultipleProtocolInterfaces (
+ Handle,
+ &gEfiDevicePathProtocolGuid,
+ PciIoDevice->DevicePath,
+ &gEfiPciIoProtocolGuid,
+ &PciIoDevice->PciIo,
+ NULL
+ );
+ }
+
+ if (EFI_ERROR (Status)) {
+ gBS->OpenProtocol (
+ Controller,
+ &gEfiPciRootBridgeIoProtocolGuid,
+ (VOID **) &PciRootBridgeIo,
+ gPciBusDriverBinding.DriverBindingHandle,
+ Handle,
+ EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
+ );
+ return Status;
+ }
+
+ //
+ // The Device Driver should disable this device after disconnect
+ // so the Pci Bus driver will not touch this device any more.
+ // Restore the register field to the original value
+ //
+ PciIoDevice->Registered = FALSE;
+ PciIoDevice->Handle = NULL;
+ } else {
+
+ //
+ // Handle may be closed before
+ //
+ return EFI_SUCCESS;
+ }
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+StartPciDevicesOnBridge (
+ IN EFI_HANDLE Controller,
+ IN PCI_IO_DEVICE *RootBridge,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath,
+ IN OUT UINT8 *NumberOfChildren,
+ IN OUT EFI_HANDLE *ChildHandleBuffer
+ )
+/*++
+
+Routine Description:
+
+ Start to manage the PCI device on specified the root bridge or PCI-PCI Bridge
+
+Arguments:
+
+ Controller - An efi handle.
+ RootBridge - A pointer to the PCI_IO_DEVICE.
+ RemainingDevicePath - A pointer to the EFI_DEVICE_PATH_PROTOCOL.
+ NumberOfChildren - Children number.
+ ChildHandleBuffer - A pointer to the child handle buffer.
+
+Returns:
+
+ None
+
+--*/
+// TODO: EFI_NOT_READY - add return value to function comment
+// TODO: EFI_SUCCESS - add return value to function comment
+// TODO: EFI_UNSUPPORTED - add return value to function comment
+// TODO: EFI_NOT_FOUND - add return value to function comment
+{
+ PCI_IO_DEVICE *Temp;
+ PCI_IO_DEVICE *PciIoDevice;
+ EFI_DEV_PATH_PTR Node;
+ EFI_DEVICE_PATH_PROTOCOL *CurrentDevicePath;
+ EFI_STATUS Status;
+ LIST_ENTRY *CurrentLink;
+ UINT64 Supports;
+
+ CurrentLink = RootBridge->ChildList.ForwardLink;
+
+ while (CurrentLink && CurrentLink != &RootBridge->ChildList) {
+
+ Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
+ if (RemainingDevicePath != NULL) {
+
+ Node.DevPath = RemainingDevicePath;
+
+ if (Node.Pci->Device != Temp->DeviceNumber ||
+ Node.Pci->Function != Temp->FunctionNumber) {
+ CurrentLink = CurrentLink->ForwardLink;
+ continue;
+ }
+
+ //
+ // Check if the device has been assigned with required resource
+ //
+ if (!Temp->Allocated) {
+ return EFI_NOT_READY;
+ }
+
+ //
+ // Check if the current node has been registered before
+ // If it is not, register it
+ //
+ if (!Temp->Registered) {
+ PciIoDevice = Temp;
+
+ Status = RegisterPciDevice (
+ Controller,
+ PciIoDevice,
+ NULL
+ );
+
+ }
+
+ if (NumberOfChildren != NULL && ChildHandleBuffer != NULL && Temp->Registered) {
+ ChildHandleBuffer[*NumberOfChildren] = Temp->Handle;
+ (*NumberOfChildren)++;
+ }
+
+ //
+ // Get the next device path
+ //
+ CurrentDevicePath = EfiNextDevicePathNode (RemainingDevicePath);
+ if (EfiIsDevicePathEnd (CurrentDevicePath)) {
+ return EFI_SUCCESS;
+ }
+
+ //
+ // If it is a PPB
+ //
+ if (!IsListEmpty (&Temp->ChildList)) {
+ Status = StartPciDevicesOnBridge (
+ Controller,
+ Temp,
+ CurrentDevicePath,
+ NumberOfChildren,
+ ChildHandleBuffer
+ );
+
+ Temp->PciIo.Attributes (
+ &(Temp->PciIo),
+ EfiPciIoAttributeOperationSupported,
+ 0,
+ &Supports
+ );
+ Supports &= EFI_PCI_DEVICE_ENABLE;
+ Temp->PciIo.Attributes (
+ &(Temp->PciIo),
+ EfiPciIoAttributeOperationEnable,
+ Supports,
+ NULL
+ );
+
+ return Status;
+ } else {
+
+ //
+ // Currently, the PCI bus driver only support PCI-PCI bridge
+ //
+ return EFI_UNSUPPORTED;
+ }
+
+ } else {
+
+ //
+ // If remaining device path is NULL,
+ // try to enable all the pci devices under this bridge
+ //
+
+ if (!Temp->Registered && Temp->Allocated) {
+
+ PciIoDevice = Temp;
+
+ Status = RegisterPciDevice (
+ Controller,
+ PciIoDevice,
+ NULL
+ );
+
+ }
+
+ if (NumberOfChildren != NULL && ChildHandleBuffer != NULL && Temp->Registered) {
+ ChildHandleBuffer[*NumberOfChildren] = Temp->Handle;
+ (*NumberOfChildren)++;
+ }
+
+ if (!IsListEmpty (&Temp->ChildList)) {
+ Status = StartPciDevicesOnBridge (
+ Controller,
+ Temp,
+ RemainingDevicePath,
+ NumberOfChildren,
+ ChildHandleBuffer
+ );
+
+ Temp->PciIo.Attributes (
+ &(Temp->PciIo),
+ EfiPciIoAttributeOperationSupported,
+ 0,
+ &Supports
+ );
+ Supports &= EFI_PCI_DEVICE_ENABLE;
+ Temp->PciIo.Attributes (
+ &(Temp->PciIo),
+ EfiPciIoAttributeOperationEnable,
+ Supports,
+ NULL
+ );
+
+ }
+
+ CurrentLink = CurrentLink->ForwardLink;
+ continue;
+ }
+ }
+
+ return EFI_NOT_FOUND;
+}
+
+EFI_STATUS
+StartPciDevices (
+ IN EFI_HANDLE Controller,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
+ )
+/*++
+
+Routine Description:
+
+ Start to manage the PCI device according to RemainingDevicePath
+ If RemainingDevicePath == NULL, the PCI bus driver will start
+ to manage all the PCI devices it found previously
+
+Arguments:
+ Controller - An efi handle.
+ RemainingDevicePath - A pointer to the EFI_DEVICE_PATH_PROTOCOL.
+
+Returns:
+
+ None
+
+--*/
+// TODO: EFI_UNSUPPORTED - add return value to function comment
+// TODO: EFI_SUCCESS - add return value to function comment
+{
+ EFI_DEV_PATH_PTR Node;
+ PCI_IO_DEVICE *RootBridge;
+ LIST_ENTRY *CurrentLink;
+
+ if (RemainingDevicePath != NULL) {
+
+ //
+ // Check if the RemainingDevicePath is valid
+ //
+ 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;
+ }
+ }
+
+ CurrentLink = gPciDevicePool.ForwardLink;
+
+ while (CurrentLink && CurrentLink != &gPciDevicePool) {
+
+ RootBridge = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
+ //
+ // Locate the right root bridge to start
+ //
+ if (RootBridge->Handle == Controller) {
+ StartPciDevicesOnBridge (
+ Controller,
+ RootBridge,
+ RemainingDevicePath,
+ NULL,
+ NULL
+ );
+ }
+
+ CurrentLink = CurrentLink->ForwardLink;
+ }
+
+ return EFI_SUCCESS;
+}
+
+PCI_IO_DEVICE *
+CreateRootBridge (
+ IN EFI_HANDLE RootBridgeHandle
+ )
+/*++
+
+Routine Description:
+
+
+Arguments:
+ RootBridgeHandle - An efi handle.
+
+Returns:
+
+ None
+
+--*/
+{
+
+ EFI_STATUS Status;
+ PCI_IO_DEVICE *Dev;
+ EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
+ EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;
+
+ Dev = NULL;
+ Status = gBS->AllocatePool (
+ EfiBootServicesData,
+ sizeof (PCI_IO_DEVICE),
+ (VOID **) &Dev
+ );
+
+ if (EFI_ERROR (Status)) {
+ return NULL;
+ }
+
+ ZeroMem (Dev, sizeof (PCI_IO_DEVICE));
+ Dev->Signature = PCI_IO_DEVICE_SIGNATURE;
+ Dev->Handle = RootBridgeHandle;
+ InitializeListHead (&Dev->ChildList);
+
+ Status = gBS->OpenProtocol (
+ RootBridgeHandle,
+ &gEfiDevicePathProtocolGuid,
+ (VOID **) &ParentDevicePath,
+ gPciBusDriverBinding.DriverBindingHandle,
+ RootBridgeHandle,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL
+ );
+
+ if (EFI_ERROR (Status)) {
+ gBS->FreePool (Dev);
+ return NULL;
+ }
+
+ //
+ // Record the root bridge parent device path
+ //
+ Dev->DevicePath = DuplicateDevicePath (ParentDevicePath);
+
+ //
+ // Get the pci root bridge io protocol
+ //
+ Status = gBS->OpenProtocol (
+ RootBridgeHandle,
+ &gEfiPciRootBridgeIoProtocolGuid,
+ (VOID **) &PciRootBridgeIo,
+ gPciBusDriverBinding.DriverBindingHandle,
+ RootBridgeHandle,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL
+ );
+
+ if (EFI_ERROR (Status)) {
+ FreePciDevice (Dev);
+ return NULL;
+ }
+
+ Dev->PciRootBridgeIo = PciRootBridgeIo;
+
+ //
+ // Initialize the PCI I/O instance structure
+ //
+ Status = InitializePciIoInstance (Dev);
+ Status = InitializePciDriverOverrideInstance (Dev);
+
+ //
+ // Initialize reserved resource list and
+ // option rom driver list
+ //
+ InitializeListHead (&Dev->ReservedResourceList);
+ InitializeListHead (&Dev->OptionRomDriverList);
+
+ return Dev;
+}
+
+PCI_IO_DEVICE *
+GetRootBridgeByHandle (
+ EFI_HANDLE RootBridgeHandle
+ )
+/*++
+
+Routine Description:
+
+
+Arguments:
+
+ RootBridgeHandle - An efi handle.
+
+Returns:
+
+ None
+
+--*/
+{
+ PCI_IO_DEVICE *RootBridgeDev;
+ LIST_ENTRY *CurrentLink;
+
+ CurrentLink = gPciDevicePool.ForwardLink;
+
+ while (CurrentLink && CurrentLink != &gPciDevicePool) {
+
+ RootBridgeDev = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
+ if (RootBridgeDev->Handle == RootBridgeHandle) {
+ return RootBridgeDev;
+ }
+
+ CurrentLink = CurrentLink->ForwardLink;
+ }
+
+ return NULL;
+}
+
+BOOLEAN
+RootBridgeExisted (
+ IN EFI_HANDLE RootBridgeHandle
+ )
+/*++
+
+Routine Description:
+
+ This function searches if RootBridgeHandle has already existed
+ in current device pool.
+
+ If so, it means the given root bridge has been already enumerated.
+
+Arguments:
+
+ RootBridgeHandle - An efi handle.
+
+Returns:
+
+ None
+
+--*/
+{
+ PCI_IO_DEVICE *Bridge;
+
+ Bridge = GetRootBridgeByHandle (RootBridgeHandle);
+
+ if (Bridge != NULL) {
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+BOOLEAN
+PciDeviceExisted (
+ IN PCI_IO_DEVICE *Bridge,
+ IN PCI_IO_DEVICE *PciIoDevice
+ )
+/*++
+
+Routine Description:
+
+Arguments:
+
+ Bridge - A pointer to the PCI_IO_DEVICE.
+ PciIoDevice - A pointer to the PCI_IO_DEVICE.
+
+Returns:
+
+ None
+
+--*/
+{
+
+ PCI_IO_DEVICE *Temp;
+ LIST_ENTRY *CurrentLink;
+
+ CurrentLink = Bridge->ChildList.ForwardLink;
+
+ while (CurrentLink && CurrentLink != &Bridge->ChildList) {
+
+ Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
+
+ if (Temp == PciIoDevice) {
+ return TRUE;
+ }
+
+ if (!IsListEmpty (&Temp->ChildList)) {
+ if (PciDeviceExisted (Temp, PciIoDevice)) {
+ return TRUE;
+ }
+ }
+
+ CurrentLink = CurrentLink->ForwardLink;
+ }
+
+ return FALSE;
+}
+
+PCI_IO_DEVICE *
+ActiveVGADeviceOnTheSameSegment (
+ IN PCI_IO_DEVICE *VgaDevice
+ )
+/*++
+
+Routine Description:
+
+Arguments:
+
+ VgaDevice - A pointer to the PCI_IO_DEVICE.
+
+Returns:
+
+ None
+
+--*/
+{
+ LIST_ENTRY *CurrentLink;
+ PCI_IO_DEVICE *Temp;
+
+ CurrentLink = gPciDevicePool.ForwardLink;
+
+ while (CurrentLink && CurrentLink != &gPciDevicePool) {
+
+ Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
+
+ if (Temp->PciRootBridgeIo->SegmentNumber == VgaDevice->PciRootBridgeIo->SegmentNumber) {
+
+ Temp = ActiveVGADeviceOnTheRootBridge (Temp);
+
+ if (Temp != NULL) {
+ return Temp;
+ }
+ }
+
+ CurrentLink = CurrentLink->ForwardLink;
+ }
+
+ return NULL;
+}
+
+PCI_IO_DEVICE *
+ActiveVGADeviceOnTheRootBridge (
+ IN PCI_IO_DEVICE *RootBridge
+ )
+/*++
+
+Routine Description:
+
+Arguments:
+
+ RootBridge - A pointer to the PCI_IO_DEVICE.
+
+Returns:
+
+ None
+
+--*/
+{
+ LIST_ENTRY *CurrentLink;
+ PCI_IO_DEVICE *Temp;
+
+ CurrentLink = RootBridge->ChildList.ForwardLink;
+
+ while (CurrentLink && CurrentLink != &RootBridge->ChildList) {
+
+ Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
+
+ if (IS_PCI_VGA(&Temp->Pci) &&
+ (Temp->Attributes &
+ (EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY |
+ EFI_PCI_IO_ATTRIBUTE_VGA_IO |
+ EFI_PCI_IO_ATTRIBUTE_VGA_IO_16))) {
+ return Temp;
+ }
+
+ if (IS_PCI_BRIDGE (&Temp->Pci)) {
+
+ Temp = ActiveVGADeviceOnTheRootBridge (Temp);
+
+ if (Temp != NULL) {
+ return Temp;
+ }
+ }
+
+ CurrentLink = CurrentLink->ForwardLink;
+ }
+
+ return NULL;
+}
+
+EFI_STATUS
+GetHpcPciAddress (
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo,
+ IN EFI_DEVICE_PATH_PROTOCOL *HpcDevicePath,
+ OUT UINT64 *PciAddress
+ )
+/*++
+
+Routine Description:
+
+Arguments:
+
+ PciRootBridgeIo - A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
+ HpcDevicePath - A pointer to the EFI_DEVICE_PATH_PROTOCL.
+ PciAddress - A pointer to the pci address.
+
+Returns:
+
+ None
+
+--*/
+// TODO: EFI_NOT_FOUND - add return value to function comment
+// TODO: EFI_NOT_FOUND - add return value to function comment
+// TODO: EFI_SUCCESS - add return value to function comment
+// TODO: EFI_NOT_FOUND - add return value to function comment
+{
+ EFI_DEVICE_PATH_PROTOCOL *CurrentDevicePath;
+ EFI_DEV_PATH_PTR Node;
+ LIST_ENTRY *CurrentLink;
+ PCI_IO_DEVICE *RootBridge;
+ EFI_STATUS Status;
+
+ CurrentDevicePath = HpcDevicePath;
+
+ //
+ // Get the remaining device path for this PCI device, if it is a PCI device
+ //
+ while (!EfiIsDevicePathEnd (CurrentDevicePath)) {
+
+ Node.DevPath = CurrentDevicePath;
+
+ //
+ // Check if it is PCI device Path?
+ //
+ if ((Node.DevPath->Type != HARDWARE_DEVICE_PATH) ||
+ ((Node.DevPath->SubType != HW_PCI_DP) &&
+ (DevicePathNodeLength (Node.DevPath) != sizeof (PCI_DEVICE_PATH)))) {
+ CurrentDevicePath = EfiNextDevicePathNode (CurrentDevicePath);
+ continue;
+ }
+
+ break;
+ }
+
+ //
+ // Check if it is not PCI device path
+ //
+ if (EfiIsDevicePathEnd (CurrentDevicePath)) {
+ return EFI_NOT_FOUND;
+ }
+
+ CurrentLink = gPciDevicePool.ForwardLink;
+
+ while (CurrentLink && CurrentLink != &gPciDevicePool) {
+
+ RootBridge = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
+ //
+ // Locate the right root bridge to start
+ //
+ if (RootBridge->PciRootBridgeIo == PciRootBridgeIo) {
+ Status = GetHpcPciAddressFromRootBridge (
+ RootBridge,
+ CurrentDevicePath,
+ PciAddress
+ );
+ if (EFI_ERROR (Status)) {
+ return EFI_NOT_FOUND;
+ }
+
+ return EFI_SUCCESS;
+
+ }
+
+ CurrentLink = CurrentLink->ForwardLink;
+ }
+
+ return EFI_NOT_FOUND;
+}
+
+EFI_STATUS
+GetHpcPciAddressFromRootBridge (
+ IN PCI_IO_DEVICE *RootBridge,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath,
+ OUT UINT64 *PciAddress
+ )
+/*++
+
+Routine Description:
+
+Arguments:
+
+ PciRootBridgeIo - A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
+ HpcDevicePath - A pointer to the EFI_DEVICE_PATH_PROTOCL.
+ PciAddress - A pointer to the pci address.
+
+Returns:
+
+ None
+
+--*/
+// TODO: RootBridge - add argument and description to function comment
+// TODO: RemainingDevicePath - add argument and description to function comment
+// TODO: EFI_SUCCESS - add return value to function comment
+// TODO: EFI_NOT_FOUND - add return value to function comment
+// TODO: EFI_SUCCESS - add return value to function comment
+{
+ EFI_DEV_PATH_PTR Node;
+ PCI_IO_DEVICE *Temp;
+ EFI_DEVICE_PATH_PROTOCOL *CurrentDevicePath;
+ LIST_ENTRY *CurrentLink;
+ BOOLEAN MisMatch;
+
+ MisMatch = FALSE;
+
+ CurrentDevicePath = RemainingDevicePath;
+ Node.DevPath = CurrentDevicePath;
+ Temp = NULL;
+
+ while (!EfiIsDevicePathEnd (CurrentDevicePath)) {
+
+ CurrentLink = RootBridge->ChildList.ForwardLink;
+ Node.DevPath = CurrentDevicePath;
+
+ while (CurrentLink && CurrentLink != &RootBridge->ChildList) {
+ Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
+
+ if (Node.Pci->Device == Temp->DeviceNumber &&
+ Node.Pci->Function == Temp->FunctionNumber) {
+ RootBridge = Temp;
+ break;
+ }
+
+ CurrentLink = CurrentLink->ForwardLink;
+ }
+
+ //
+ // Check if we find the bridge
+ //
+ if (CurrentLink == &RootBridge->ChildList) {
+
+ MisMatch = TRUE;
+ break;
+
+ }
+
+ CurrentDevicePath = EfiNextDevicePathNode (CurrentDevicePath);
+ }
+
+ if (MisMatch) {
+
+ CurrentDevicePath = EfiNextDevicePathNode (CurrentDevicePath);
+
+ if (EfiIsDevicePathEnd (CurrentDevicePath)) {
+ *PciAddress = EFI_PCI_ADDRESS (RootBridge->BusNumber, Node.Pci->Device, Node.Pci->Function, 0);
+ return EFI_SUCCESS;
+ }
+
+ return EFI_NOT_FOUND;
+ }
+
+ *PciAddress = EFI_PCI_ADDRESS (Temp->BusNumber, Temp->DeviceNumber, Temp->FunctionNumber, 0);
+
+ return EFI_SUCCESS;
+
+}
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