+++ /dev/null
-/*++\r
-\r
-Copyright (c) 2005 - 2006, Intel Corporation. All rights reserved.<BR>\r
-This program and the accompanying materials \r
-are licensed and made available under the terms and conditions of the BSD License \r
-which accompanies this distribution. The full text of the license may be found at \r
-http://opensource.org/licenses/bsd-license.php \r
- \r
-THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
-WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
-\r
-Module Name:\r
-\r
- PciDeviceSupport.c\r
- \r
-Abstract:\r
-\r
- This file provides routine to support Pci device node manipulation\r
-\r
-Revision History\r
-\r
---*/\r
-\r
-#include "PciBus.h"\r
-\r
-//\r
-// This device structure is serviced as a header.\r
-// Its Next field points to the first root bridge device node\r
-//\r
-LIST_ENTRY gPciDevicePool;\r
-\r
-EFI_STATUS\r
-InitializePciDevicePool (\r
- VOID\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
- Initialize the gPciDevicePool\r
-\r
-Arguments:\r
-\r
-Returns:\r
-\r
- None\r
-\r
---*/\r
-{\r
- InitializeListHead (&gPciDevicePool);\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-EFI_STATUS\r
-InsertRootBridge (\r
- IN PCI_IO_DEVICE *RootBridge\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
- Insert a root bridge into PCI device pool\r
-\r
-Arguments:\r
-\r
- RootBridge - A pointer to the PCI_IO_DEVICE.\r
-\r
-Returns:\r
-\r
- None\r
-\r
---*/\r
-{\r
- InsertTailList (&gPciDevicePool, &(RootBridge->Link));\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-EFI_STATUS\r
-InsertPciDevice (\r
- PCI_IO_DEVICE *Bridge,\r
- PCI_IO_DEVICE *PciDeviceNode\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
- This function is used to insert a PCI device node under\r
- a bridge\r
-\r
-Arguments:\r
- Bridge - A pointer to the PCI_IO_DEVICE.\r
- PciDeviceNode - A pointer to the PCI_IO_DEVICE.\r
-\r
-Returns:\r
-\r
- None\r
-\r
---*/\r
-\r
-{\r
-\r
- InsertTailList (&Bridge->ChildList, &(PciDeviceNode->Link));\r
- PciDeviceNode->Parent = Bridge;\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-EFI_STATUS\r
-DestroyRootBridge (\r
- IN PCI_IO_DEVICE *RootBridge\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
- \r
-Arguments:\r
-\r
- RootBridge - A pointer to the PCI_IO_DEVICE.\r
-\r
-Returns:\r
-\r
- None\r
-\r
---*/\r
-{\r
- DestroyPciDeviceTree (RootBridge);\r
-\r
- gBS->FreePool (RootBridge);\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-EFI_STATUS\r
-DestroyPciDeviceTree (\r
- IN PCI_IO_DEVICE *Bridge\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
- Destroy all the pci device node under the bridge.\r
- Bridge itself is not included.\r
-\r
-Arguments:\r
-\r
- Bridge - A pointer to the PCI_IO_DEVICE.\r
-\r
-Returns:\r
-\r
- None\r
-\r
---*/\r
-{\r
- LIST_ENTRY *CurrentLink;\r
- PCI_IO_DEVICE *Temp;\r
-\r
- while (!IsListEmpty (&Bridge->ChildList)) {\r
-\r
- CurrentLink = Bridge->ChildList.ForwardLink;\r
-\r
- //\r
- // Remove this node from the linked list\r
- //\r
- RemoveEntryList (CurrentLink);\r
-\r
- Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r
-\r
- if (IS_PCI_BRIDGE (&(Temp->Pci))) {\r
- DestroyPciDeviceTree (Temp);\r
- }\r
- gBS->FreePool (Temp);\r
- }\r
- \r
- return EFI_SUCCESS;\r
-}\r
-\r
-EFI_STATUS\r
-DestroyRootBridgeByHandle (\r
- EFI_HANDLE Controller\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
- Destroy all device nodes under the root bridge\r
- specified by Controller. \r
- The root bridge itself is also included.\r
-\r
-Arguments:\r
-\r
- Controller - An efi handle.\r
-\r
-Returns:\r
-\r
- None\r
-\r
---*/\r
-{\r
-\r
- LIST_ENTRY *CurrentLink;\r
- PCI_IO_DEVICE *Temp;\r
-\r
- CurrentLink = gPciDevicePool.ForwardLink;\r
-\r
- while (CurrentLink && CurrentLink != &gPciDevicePool) {\r
- Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r
-\r
- if (Temp->Handle == Controller) {\r
-\r
- RemoveEntryList (CurrentLink);\r
-\r
- DestroyPciDeviceTree (Temp);\r
-\r
- gBS->FreePool(Temp);\r
-\r
- return EFI_SUCCESS;\r
- }\r
-\r
- CurrentLink = CurrentLink->ForwardLink;\r
- }\r
-\r
- return EFI_NOT_FOUND;\r
-}\r
-\r
-EFI_STATUS\r
-RegisterPciDevice (\r
- IN EFI_HANDLE Controller,\r
- IN PCI_IO_DEVICE *PciIoDevice,\r
- OUT EFI_HANDLE *Handle OPTIONAL\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
- This function registers the PCI IO device. It creates a handle for this PCI IO device \r
- (if the handle does not exist), attaches appropriate protocols onto the handle, does\r
- necessary initialization, and sets up parent/child relationship with its bus controller.\r
-\r
-Arguments:\r
-\r
- Controller - An EFI handle for the PCI bus controller.\r
- PciIoDevice - A PCI_IO_DEVICE pointer to the PCI IO device to be registered.\r
- Handle - A pointer to hold the EFI handle for the PCI IO device.\r
-\r
-Returns:\r
-\r
- EFI_SUCCESS - The PCI device is successfully registered.\r
- Others - An error occurred when registering the PCI device.\r
-\r
---*/\r
-{\r
- EFI_STATUS Status;\r
- UINT8 PciExpressCapRegOffset;\r
-\r
- //\r
- // Install the pciio protocol, device path protocol and \r
- // Bus Specific Driver Override Protocol\r
- //\r
-\r
- if (PciIoDevice->BusOverride) {\r
- Status = gBS->InstallMultipleProtocolInterfaces (\r
- &PciIoDevice->Handle, \r
- &gEfiDevicePathProtocolGuid,\r
- PciIoDevice->DevicePath,\r
- &gEfiPciIoProtocolGuid,\r
- &PciIoDevice->PciIo,\r
- &gEfiBusSpecificDriverOverrideProtocolGuid,\r
- &PciIoDevice->PciDriverOverride,\r
- NULL\r
- );\r
- } else {\r
- Status = gBS->InstallMultipleProtocolInterfaces (\r
- &PciIoDevice->Handle, \r
- &gEfiDevicePathProtocolGuid,\r
- PciIoDevice->DevicePath,\r
- &gEfiPciIoProtocolGuid,\r
- &PciIoDevice->PciIo,\r
- NULL\r
- );\r
- }\r
-\r
- if (EFI_ERROR (Status)) {\r
- return Status;\r
- } else {\r
- Status = gBS->OpenProtocol (\r
- Controller, \r
- &gEfiPciRootBridgeIoProtocolGuid, \r
- (VOID **)&(PciIoDevice->PciRootBridgeIo),\r
- gPciBusDriverBinding.DriverBindingHandle,\r
- PciIoDevice->Handle, \r
- EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r
- );\r
- if (EFI_ERROR (Status)) {\r
- return Status;\r
- }\r
- }\r
-\r
- if (Handle != NULL) {\r
- *Handle = PciIoDevice->Handle;\r
- }\r
-\r
- //\r
- // Detect if PCI Express Device\r
- //\r
- PciExpressCapRegOffset = 0;\r
- Status = LocateCapabilityRegBlock (\r
- PciIoDevice,\r
- EFI_PCI_CAPABILITY_ID_PCIEXP,\r
- &PciExpressCapRegOffset,\r
- NULL\r
- );\r
- if (!EFI_ERROR (Status)) {\r
- PciIoDevice->IsPciExp = TRUE;\r
- DEBUG ((EFI_D_ERROR, "PciExp - %x (B-%x, D-%x, F-%x)\n", PciIoDevice->IsPciExp, PciIoDevice->BusNumber, PciIoDevice->DeviceNumber, PciIoDevice->FunctionNumber));\r
- }\r
- \r
- //\r
- // Indicate the pci device is registered\r
- //\r
- PciIoDevice->Registered = TRUE;\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-\r
-EFI_STATUS\r
-DeRegisterPciDevice (\r
- IN EFI_HANDLE Controller,\r
- IN EFI_HANDLE Handle\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
- This function is used to de-register the PCI device from the EFI,\r
- That includes un-installing PciIo protocol from the specified PCI \r
- device handle.\r
-\r
-Arguments:\r
-\r
- Controller - An efi handle.\r
- Handle - An efi handle.\r
-\r
-Returns:\r
-\r
- None\r
-\r
---*/\r
-{\r
- EFI_PCI_IO_PROTOCOL *PciIo;\r
- EFI_STATUS Status;\r
- PCI_IO_DEVICE *PciIoDevice;\r
- PCI_IO_DEVICE *Node;\r
- LIST_ENTRY *CurrentLink;\r
- EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;\r
-\r
- Status = gBS->OpenProtocol (\r
- Handle,\r
- &gEfiPciIoProtocolGuid,\r
- (VOID **) &PciIo,\r
- gPciBusDriverBinding.DriverBindingHandle,\r
- Controller,\r
- EFI_OPEN_PROTOCOL_GET_PROTOCOL\r
- );\r
- if (!EFI_ERROR (Status)) {\r
- PciIoDevice = PCI_IO_DEVICE_FROM_PCI_IO_THIS (PciIo);\r
-\r
- //\r
- // If it is already de-registered\r
- //\r
- if (!PciIoDevice->Registered) {\r
- return EFI_SUCCESS;\r
- }\r
-\r
- //\r
- // If it is PPB, first de-register its children\r
- //\r
-\r
- if (IS_PCI_BRIDGE (&(PciIoDevice->Pci))) {\r
-\r
- CurrentLink = PciIoDevice->ChildList.ForwardLink;\r
-\r
- while (CurrentLink && CurrentLink != &PciIoDevice->ChildList) {\r
- Node = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r
- Status = DeRegisterPciDevice (Controller, Node->Handle);\r
-\r
- if (EFI_ERROR (Status)) {\r
- return Status;\r
- }\r
-\r
- CurrentLink = CurrentLink->ForwardLink;\r
- }\r
- }\r
-\r
- //\r
- // First disconnect this device\r
- //\r
-// PciIoDevice->PciIo.Attributes(&(PciIoDevice->PciIo),\r
-// EfiPciIoAttributeOperationDisable,\r
-// EFI_PCI_DEVICE_ENABLE,\r
-// NULL\r
-// );\r
- \r
- //\r
- // Close the child handle\r
- //\r
- Status = gBS->CloseProtocol (\r
- Controller,\r
- &gEfiPciRootBridgeIoProtocolGuid,\r
- gPciBusDriverBinding.DriverBindingHandle,\r
- Handle\r
- );\r
-\r
- //\r
- // Un-install the device path protocol and pci io protocol\r
- //\r
- if (PciIoDevice->BusOverride) {\r
- Status = gBS->UninstallMultipleProtocolInterfaces (\r
- Handle,\r
- &gEfiDevicePathProtocolGuid,\r
- PciIoDevice->DevicePath,\r
- &gEfiPciIoProtocolGuid,\r
- &PciIoDevice->PciIo,\r
- &gEfiBusSpecificDriverOverrideProtocolGuid,\r
- &PciIoDevice->PciDriverOverride,\r
- NULL\r
- );\r
- } else {\r
- Status = gBS->UninstallMultipleProtocolInterfaces (\r
- Handle,\r
- &gEfiDevicePathProtocolGuid,\r
- PciIoDevice->DevicePath,\r
- &gEfiPciIoProtocolGuid,\r
- &PciIoDevice->PciIo,\r
- NULL\r
- );\r
- }\r
-\r
- if (EFI_ERROR (Status)) {\r
- gBS->OpenProtocol (\r
- Controller,\r
- &gEfiPciRootBridgeIoProtocolGuid,\r
- (VOID **) &PciRootBridgeIo,\r
- gPciBusDriverBinding.DriverBindingHandle,\r
- Handle,\r
- EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r
- );\r
- return Status;\r
- }\r
- \r
- //\r
- // The Device Driver should disable this device after disconnect\r
- // so the Pci Bus driver will not touch this device any more.\r
- // Restore the register field to the original value\r
- //\r
- PciIoDevice->Registered = FALSE;\r
- PciIoDevice->Handle = NULL;\r
- } else {\r
-\r
- //\r
- // Handle may be closed before\r
- //\r
- return EFI_SUCCESS;\r
- }\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-EFI_STATUS\r
-EnableBridgeAttributes (\r
- IN PCI_IO_DEVICE *PciIoDevice\r
- )\r
-{\r
- PCI_TYPE01 PciData;\r
-\r
- //\r
- // NOTE: We should not set EFI_PCI_DEVICE_ENABLE for a bridge\r
- // directly, because some legacy BIOS will NOT assign\r
- // IO or Memory resource for a bridge who has no child\r
- // device. So we add check IO or Memory here.\r
- //\r
-\r
- PciIoDevice->PciIo.Pci.Read (\r
- &PciIoDevice->PciIo,\r
- EfiPciIoWidthUint8,\r
- 0,\r
- sizeof (PciData),\r
- &PciData\r
- );\r
-\r
- if ((((PciData.Bridge.IoBase & 0xF) == 0) &&\r
- (PciData.Bridge.IoBase != 0 || PciData.Bridge.IoLimit != 0)) ||\r
- (((PciData.Bridge.IoBase & 0xF) == 1) &&\r
- ((PciData.Bridge.IoBase & 0xF0) != 0 || (PciData.Bridge.IoLimit & 0xF0) != 0 || PciData.Bridge.IoBaseUpper16 != 0 || PciData.Bridge.IoLimitUpper16 != 0))) {\r
- PciIoDevice->PciIo.Attributes(\r
- &(PciIoDevice->PciIo),\r
- EfiPciIoAttributeOperationEnable,\r
- (EFI_PCI_IO_ATTRIBUTE_IO | EFI_PCI_IO_ATTRIBUTE_BUS_MASTER),\r
- NULL\r
- );\r
- }\r
- if ((PciData.Bridge.MemoryBase & 0xFFF0) != 0 || (PciData.Bridge.MemoryLimit & 0xFFF0) != 0) {\r
- PciIoDevice->PciIo.Attributes(\r
- &(PciIoDevice->PciIo),\r
- EfiPciIoAttributeOperationEnable,\r
- (EFI_PCI_IO_ATTRIBUTE_MEMORY | EFI_PCI_IO_ATTRIBUTE_BUS_MASTER),\r
- NULL\r
- );\r
- }\r
- if ((((PciData.Bridge.PrefetchableMemoryBase & 0xF) == 0) &&\r
- (PciData.Bridge.PrefetchableMemoryBase != 0 || PciData.Bridge.PrefetchableMemoryLimit != 0)) ||\r
- (((PciData.Bridge.PrefetchableMemoryBase & 0xF) == 1) &&\r
- ((PciData.Bridge.PrefetchableMemoryBase & 0xFFF0) != 0 || (PciData.Bridge.PrefetchableMemoryLimit & 0xFFF0) != 0 || PciData.Bridge.PrefetchableBaseUpper32 != 0 || PciData.Bridge.PrefetchableLimitUpper32 != 0))) {\r
- PciIoDevice->PciIo.Attributes(\r
- &(PciIoDevice->PciIo),\r
- EfiPciIoAttributeOperationEnable,\r
- (EFI_PCI_IO_ATTRIBUTE_MEMORY | EFI_PCI_IO_ATTRIBUTE_BUS_MASTER),\r
- NULL\r
- );\r
- }\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-EFI_STATUS \r
-StartPciDevicesOnBridge (\r
- IN EFI_HANDLE Controller,\r
- IN PCI_IO_DEVICE *RootBridge,\r
- IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath \r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
- Start to manage the PCI device on specified the root bridge or PCI-PCI Bridge\r
-\r
-Arguments:\r
-\r
- Controller - An efi handle.\r
- RootBridge - A pointer to the PCI_IO_DEVICE.\r
- RemainingDevicePath - A pointer to the EFI_DEVICE_PATH_PROTOCOL.\r
- NumberOfChildren - Children number.\r
- ChildHandleBuffer - A pointer to the child handle buffer.\r
-\r
-Returns:\r
-\r
- None\r
-\r
---*/\r
-{\r
- PCI_IO_DEVICE *Temp;\r
- PCI_IO_DEVICE *PciIoDevice;\r
- EFI_DEV_PATH_PTR Node;\r
- EFI_DEVICE_PATH_PROTOCOL *CurrentDevicePath;\r
- EFI_STATUS Status;\r
- LIST_ENTRY *CurrentLink;\r
-\r
- CurrentLink = RootBridge->ChildList.ForwardLink;\r
-\r
- while (CurrentLink && CurrentLink != &RootBridge->ChildList) {\r
-\r
- Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r
- if (RemainingDevicePath != NULL) {\r
-\r
- Node.DevPath = RemainingDevicePath;\r
-\r
- if (Node.Pci->Device != Temp->DeviceNumber || \r
- Node.Pci->Function != Temp->FunctionNumber) {\r
- CurrentLink = CurrentLink->ForwardLink;\r
- continue;\r
- }\r
-\r
- //\r
- // Check if the device has been assigned with required resource\r
- //\r
- if (!Temp->Allocated) {\r
- return EFI_NOT_READY;\r
- }\r
- \r
- //\r
- // Check if the current node has been registered before\r
- // If it is not, register it\r
- //\r
- if (!Temp->Registered) {\r
- PciIoDevice = Temp;\r
-\r
- Status = RegisterPciDevice (\r
- Controller,\r
- PciIoDevice,\r
- NULL\r
- );\r
-\r
- }\r
- \r
- //\r
- // Get the next device path\r
- //\r
- CurrentDevicePath = NextDevicePathNode (RemainingDevicePath);\r
- if (IsDevicePathEnd (CurrentDevicePath)) {\r
- return EFI_SUCCESS;\r
- }\r
- \r
- //\r
- // If it is a PPB\r
- //\r
- if (IS_PCI_BRIDGE (&(Temp->Pci))) {\r
- Status = StartPciDevicesOnBridge (\r
- Controller,\r
- Temp,\r
- CurrentDevicePath\r
- );\r
- EnableBridgeAttributes (Temp);\r
-\r
- return Status;\r
- } else {\r
-\r
- //\r
- // Currently, the PCI bus driver only support PCI-PCI bridge\r
- //\r
- return EFI_UNSUPPORTED;\r
- }\r
-\r
- } else {\r
-\r
- //\r
- // If remaining device path is NULL,\r
- // try to enable all the pci devices under this bridge\r
- //\r
-\r
- if (!Temp->Registered && Temp->Allocated) {\r
-\r
- PciIoDevice = Temp;\r
-\r
- Status = RegisterPciDevice (\r
- Controller,\r
- PciIoDevice,\r
- NULL\r
- );\r
-\r
- }\r
-\r
- if (IS_PCI_BRIDGE (&(Temp->Pci))) {\r
- Status = StartPciDevicesOnBridge ( \r
- Controller,\r
- Temp,\r
- RemainingDevicePath\r
- );\r
- EnableBridgeAttributes (Temp);\r
- }\r
-\r
- CurrentLink = CurrentLink->ForwardLink;\r
- continue;\r
- }\r
- }\r
-\r
- return EFI_NOT_FOUND;\r
-}\r
-\r
-EFI_STATUS\r
-StartPciDevices (\r
- IN EFI_HANDLE Controller,\r
- IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
- Start to manage the PCI device according to RemainingDevicePath\r
- If RemainingDevicePath == NULL, the PCI bus driver will start \r
- to manage all the PCI devices it found previously\r
-\r
-Arguments:\r
- Controller - An efi handle.\r
- RemainingDevicePath - A pointer to the EFI_DEVICE_PATH_PROTOCOL.\r
-\r
-Returns:\r
-\r
- None\r
-\r
---*/\r
-{\r
- EFI_DEV_PATH_PTR Node;\r
- PCI_IO_DEVICE *RootBridge;\r
- LIST_ENTRY *CurrentLink;\r
-\r
- if (RemainingDevicePath != NULL) {\r
-\r
- //\r
- // Check if the RemainingDevicePath is valid\r
- //\r
- Node.DevPath = RemainingDevicePath;\r
- if (Node.DevPath->Type != HARDWARE_DEVICE_PATH ||\r
- Node.DevPath->SubType != HW_PCI_DP ||\r
- DevicePathNodeLength (Node.DevPath) != sizeof (PCI_DEVICE_PATH)\r
- ) {\r
- return EFI_UNSUPPORTED;\r
- }\r
- }\r
-\r
- CurrentLink = gPciDevicePool.ForwardLink;\r
-\r
- while (CurrentLink && CurrentLink != &gPciDevicePool) {\r
-\r
- RootBridge = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r
- //\r
- // Locate the right root bridge to start\r
- //\r
- if (RootBridge->Handle == Controller) {\r
- StartPciDevicesOnBridge (\r
- Controller,\r
- RootBridge,\r
- RemainingDevicePath\r
- );\r
- }\r
-\r
- CurrentLink = CurrentLink->ForwardLink;\r
- }\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-PCI_IO_DEVICE *\r
-CreateRootBridge (\r
- IN EFI_HANDLE RootBridgeHandle\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
-\r
-Arguments:\r
- RootBridgeHandle - An efi handle.\r
-\r
-Returns:\r
-\r
- None\r
-\r
---*/\r
-{\r
-\r
- EFI_STATUS Status;\r
- PCI_IO_DEVICE *Dev;\r
-\r
- Dev = NULL;\r
- Status = gBS->AllocatePool (\r
- EfiBootServicesData,\r
- sizeof (PCI_IO_DEVICE),\r
- (VOID **) &Dev\r
- );\r
-\r
- if (EFI_ERROR (Status)) {\r
- return NULL;\r
- }\r
-\r
- ZeroMem (Dev, sizeof (PCI_IO_DEVICE));\r
- Dev->Signature = PCI_IO_DEVICE_SIGNATURE;\r
- Dev->Handle = RootBridgeHandle;\r
- InitializeListHead (&Dev->ChildList);\r
-\r
- return Dev;\r
-}\r
-\r
-PCI_IO_DEVICE *\r
-GetRootBridgeByHandle (\r
- EFI_HANDLE RootBridgeHandle\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
-\r
-Arguments:\r
-\r
- RootBridgeHandle - An efi handle.\r
-\r
-Returns:\r
-\r
- None\r
-\r
---*/\r
-{\r
- PCI_IO_DEVICE *RootBridgeDev;\r
- LIST_ENTRY *CurrentLink;\r
-\r
- CurrentLink = gPciDevicePool.ForwardLink;\r
-\r
- while (CurrentLink && CurrentLink != &gPciDevicePool) {\r
-\r
- RootBridgeDev = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r
- if (RootBridgeDev->Handle == RootBridgeHandle) {\r
- return RootBridgeDev;\r
- }\r
-\r
- CurrentLink = CurrentLink->ForwardLink;\r
- }\r
-\r
- return NULL;\r
-}\r
-\r
-BOOLEAN\r
-RootBridgeExisted (\r
- IN EFI_HANDLE RootBridgeHandle\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
- This function searches if RootBridgeHandle has already existed\r
- in current device pool.\r
-\r
- If so, it means the given root bridge has been already enumerated.\r
-\r
-Arguments:\r
-\r
- RootBridgeHandle - An efi handle.\r
-\r
-Returns:\r
-\r
- None\r
-\r
---*/\r
-{\r
- PCI_IO_DEVICE *Bridge;\r
-\r
- Bridge = GetRootBridgeByHandle (RootBridgeHandle);\r
-\r
- if (Bridge != NULL) {\r
- return TRUE;\r
- }\r
-\r
- return FALSE;\r
-}\r
-\r
-BOOLEAN\r
-PciDeviceExisted (\r
- IN PCI_IO_DEVICE *Bridge,\r
- IN PCI_IO_DEVICE *PciIoDevice\r
- )\r
-/*++\r
-\r
-Routine Description:\r
- \r
-Arguments:\r
-\r
- Bridge - A pointer to the PCI_IO_DEVICE.\r
- PciIoDevice - A pointer to the PCI_IO_DEVICE.\r
-\r
-Returns:\r
-\r
- None\r
-\r
---*/\r
-{\r
-\r
- PCI_IO_DEVICE *Temp;\r
- LIST_ENTRY *CurrentLink;\r
-\r
- CurrentLink = Bridge->ChildList.ForwardLink;\r
-\r
- while (CurrentLink && CurrentLink != &Bridge->ChildList) {\r
-\r
- Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r
-\r
- if (Temp == PciIoDevice) {\r
- return TRUE;\r
- }\r
-\r
- if (!IsListEmpty (&Temp->ChildList)) {\r
- if (PciDeviceExisted (Temp, PciIoDevice)) {\r
- return TRUE;\r
- }\r
- }\r
-\r
- CurrentLink = CurrentLink->ForwardLink;\r
- }\r
-\r
- return FALSE;\r
-}\r
-\r
-PCI_IO_DEVICE *\r
-ActiveVGADeviceOnTheSameSegment (\r
- IN PCI_IO_DEVICE *VgaDevice\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
-Arguments:\r
-\r
- VgaDevice - A pointer to the PCI_IO_DEVICE.\r
- \r
-Returns:\r
-\r
- None\r
-\r
---*/\r
-{\r
- LIST_ENTRY *CurrentLink;\r
- PCI_IO_DEVICE *Temp;\r
-\r
- CurrentLink = gPciDevicePool.ForwardLink;\r
-\r
- while (CurrentLink && CurrentLink != &gPciDevicePool) {\r
-\r
- Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r
-\r
- if (Temp->PciRootBridgeIo->SegmentNumber == VgaDevice->PciRootBridgeIo->SegmentNumber) {\r
-\r
- Temp = ActiveVGADeviceOnTheRootBridge (Temp);\r
-\r
- if (Temp != NULL) {\r
- return Temp;\r
- }\r
- }\r
-\r
- CurrentLink = CurrentLink->ForwardLink;\r
- }\r
-\r
- return NULL;\r
-}\r
-\r
-PCI_IO_DEVICE *\r
-ActiveVGADeviceOnTheRootBridge (\r
- IN PCI_IO_DEVICE *RootBridge\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
-Arguments:\r
-\r
- RootBridge - A pointer to the PCI_IO_DEVICE.\r
-\r
-Returns:\r
-\r
- None\r
-\r
---*/\r
-{\r
- LIST_ENTRY *CurrentLink;\r
- PCI_IO_DEVICE *Temp;\r
-\r
- CurrentLink = RootBridge->ChildList.ForwardLink;\r
-\r
- while (CurrentLink && CurrentLink != &RootBridge->ChildList) {\r
-\r
- Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r
-\r
- if (IS_PCI_VGA(&Temp->Pci) && \r
- (Temp->Attributes &\r
- (EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY |\r
- EFI_PCI_IO_ATTRIBUTE_VGA_IO |\r
- EFI_PCI_IO_ATTRIBUTE_VGA_IO_16))) {\r
- return Temp;\r
- }\r
-\r
- if (IS_PCI_BRIDGE (&Temp->Pci)) {\r
-\r
- Temp = ActiveVGADeviceOnTheRootBridge (Temp);\r
-\r
- if (Temp != NULL) {\r
- return Temp;\r
- }\r
- }\r
-\r
- CurrentLink = CurrentLink->ForwardLink;\r
- }\r
-\r
- return NULL;\r
-}\r
projects / mirror_edk2.git / blobdiff