mirror of https://github.com/acidanthera/audk.git
1057 lines
28 KiB
C
1057 lines
28 KiB
C
/** @file
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Supporting functions implementation for PCI devices management.
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Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
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(C) Copyright 2018 Hewlett Packard Enterprise Development LP<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "PciBus.h"
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//
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// This device structure is serviced as a header.
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// Its next field points to the first root bridge device node.
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//
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LIST_ENTRY mPciDevicePool;
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/**
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Initialize the PCI devices pool.
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**/
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VOID
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InitializePciDevicePool (
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VOID
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)
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{
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InitializeListHead (&mPciDevicePool);
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}
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/**
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Insert a root bridge into PCI device pool.
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@param RootBridge A pointer to the PCI_IO_DEVICE.
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**/
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VOID
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InsertRootBridge (
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IN PCI_IO_DEVICE *RootBridge
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)
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{
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InsertTailList (&mPciDevicePool, &(RootBridge->Link));
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}
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/**
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This function is used to insert a PCI device node under
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a bridge.
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@param Bridge The PCI bridge.
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@param PciDeviceNode The PCI device needs inserting.
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**/
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VOID
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InsertPciDevice (
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IN PCI_IO_DEVICE *Bridge,
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IN PCI_IO_DEVICE *PciDeviceNode
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)
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{
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InsertTailList (&Bridge->ChildList, &(PciDeviceNode->Link));
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PciDeviceNode->Parent = Bridge;
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}
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/**
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Destroy root bridge and remove it from device tree.
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@param RootBridge The bridge want to be removed.
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**/
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VOID
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DestroyRootBridge (
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IN PCI_IO_DEVICE *RootBridge
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)
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{
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DestroyPciDeviceTree (RootBridge);
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FreePciDevice (RootBridge);
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}
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/**
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Destroy a pci device node.
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All direct or indirect allocated resource for this node will be freed.
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@param PciIoDevice A pointer to the PCI_IO_DEVICE to be destroyed.
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**/
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VOID
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FreePciDevice (
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IN PCI_IO_DEVICE *PciIoDevice
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)
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{
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ASSERT (PciIoDevice != NULL);
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//
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// Assume all children have been removed underneath this device
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//
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if (PciIoDevice->ResourcePaddingDescriptors != NULL) {
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FreePool (PciIoDevice->ResourcePaddingDescriptors);
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}
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if (PciIoDevice->DevicePath != NULL) {
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FreePool (PciIoDevice->DevicePath);
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}
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if (PciIoDevice->BusNumberRanges != NULL) {
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FreePool (PciIoDevice->BusNumberRanges);
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}
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FreePool (PciIoDevice);
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}
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/**
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Destroy all the pci device node under the bridge.
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Bridge itself is not included.
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@param Bridge A pointer to the PCI_IO_DEVICE.
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**/
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VOID
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DestroyPciDeviceTree (
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IN PCI_IO_DEVICE *Bridge
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)
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{
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LIST_ENTRY *CurrentLink;
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PCI_IO_DEVICE *Temp;
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while (!IsListEmpty (&Bridge->ChildList)) {
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CurrentLink = Bridge->ChildList.ForwardLink;
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//
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// Remove this node from the linked list
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//
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RemoveEntryList (CurrentLink);
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Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
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if (!IsListEmpty (&Temp->ChildList)) {
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DestroyPciDeviceTree (Temp);
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}
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FreePciDevice (Temp);
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}
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}
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/**
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Destroy all device nodes under the root bridge
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specified by Controller.
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The root bridge itself is also included.
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@param Controller Root bridge handle.
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@retval EFI_SUCCESS Destroy all device nodes successfully.
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@retval EFI_NOT_FOUND Cannot find any PCI device under specified
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root bridge.
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**/
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EFI_STATUS
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DestroyRootBridgeByHandle (
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IN EFI_HANDLE Controller
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)
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{
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LIST_ENTRY *CurrentLink;
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PCI_IO_DEVICE *Temp;
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CurrentLink = mPciDevicePool.ForwardLink;
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while (CurrentLink != NULL && CurrentLink != &mPciDevicePool) {
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Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
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if (Temp->Handle == Controller) {
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RemoveEntryList (CurrentLink);
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DestroyPciDeviceTree (Temp);
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FreePciDevice (Temp);
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return EFI_SUCCESS;
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}
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CurrentLink = CurrentLink->ForwardLink;
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}
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return EFI_NOT_FOUND;
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}
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/**
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This function registers the PCI IO device.
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It creates a handle for this PCI IO device (if the handle does not exist), attaches
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appropriate protocols onto the handle, does necessary initialization, and sets up
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parent/child relationship with its bus controller.
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@param Controller An EFI handle for the PCI bus controller.
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@param PciIoDevice A PCI_IO_DEVICE pointer to the PCI IO device to be registered.
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@param Handle A pointer to hold the returned EFI handle for the PCI IO device.
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@retval EFI_SUCCESS The PCI device is successfully registered.
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@retval other An error occurred when registering the PCI device.
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**/
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EFI_STATUS
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RegisterPciDevice (
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IN EFI_HANDLE Controller,
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IN PCI_IO_DEVICE *PciIoDevice,
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OUT EFI_HANDLE *Handle OPTIONAL
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)
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{
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EFI_STATUS Status;
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VOID *PlatformOpRomBuffer;
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UINTN PlatformOpRomSize;
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EFI_PCI_IO_PROTOCOL *PciIo;
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UINT8 Data8;
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BOOLEAN HasEfiImage;
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//
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// Install the pciio protocol, device path protocol
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//
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Status = gBS->InstallMultipleProtocolInterfaces (
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&PciIoDevice->Handle,
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&gEfiDevicePathProtocolGuid,
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PciIoDevice->DevicePath,
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&gEfiPciIoProtocolGuid,
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&PciIoDevice->PciIo,
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NULL
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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//
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// Force Interrupt line to "Unknown" or "No Connection"
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//
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PciIo = &(PciIoDevice->PciIo);
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Data8 = PCI_INT_LINE_UNKNOWN;
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PciIo->Pci.Write (PciIo, EfiPciIoWidthUint8, 0x3C, 1, &Data8);
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//
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// Process OpRom
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//
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if (!PciIoDevice->AllOpRomProcessed) {
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//
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// Get the OpRom provided by platform
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//
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if (gPciPlatformProtocol != NULL) {
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Status = gPciPlatformProtocol->GetPciRom (
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gPciPlatformProtocol,
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PciIoDevice->Handle,
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&PlatformOpRomBuffer,
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&PlatformOpRomSize
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);
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if (!EFI_ERROR (Status)) {
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PciIoDevice->EmbeddedRom = FALSE;
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PciIoDevice->RomSize = (UINT32) PlatformOpRomSize;
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PciIoDevice->PciIo.RomSize = PlatformOpRomSize;
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PciIoDevice->PciIo.RomImage = PlatformOpRomBuffer;
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//
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// For OpROM read from gPciPlatformProtocol:
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// Add the Rom Image to internal database for later PCI light enumeration
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//
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PciRomAddImageMapping (
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NULL,
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PciIoDevice->PciRootBridgeIo->SegmentNumber,
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PciIoDevice->BusNumber,
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PciIoDevice->DeviceNumber,
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PciIoDevice->FunctionNumber,
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PciIoDevice->PciIo.RomImage,
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PciIoDevice->PciIo.RomSize
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);
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}
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} else if (gPciOverrideProtocol != NULL) {
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Status = gPciOverrideProtocol->GetPciRom (
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gPciOverrideProtocol,
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PciIoDevice->Handle,
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&PlatformOpRomBuffer,
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&PlatformOpRomSize
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);
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if (!EFI_ERROR (Status)) {
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PciIoDevice->EmbeddedRom = FALSE;
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PciIoDevice->RomSize = (UINT32) PlatformOpRomSize;
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PciIoDevice->PciIo.RomSize = PlatformOpRomSize;
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PciIoDevice->PciIo.RomImage = PlatformOpRomBuffer;
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//
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// For OpROM read from gPciOverrideProtocol:
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// Add the Rom Image to internal database for later PCI light enumeration
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//
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PciRomAddImageMapping (
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NULL,
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PciIoDevice->PciRootBridgeIo->SegmentNumber,
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PciIoDevice->BusNumber,
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PciIoDevice->DeviceNumber,
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PciIoDevice->FunctionNumber,
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PciIoDevice->PciIo.RomImage,
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PciIoDevice->PciIo.RomSize
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);
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}
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}
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}
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//
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// Determine if there are EFI images in the option rom
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//
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HasEfiImage = ContainEfiImage (PciIoDevice->PciIo.RomImage, PciIoDevice->PciIo.RomSize);
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if (HasEfiImage) {
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Status = gBS->InstallMultipleProtocolInterfaces (
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&PciIoDevice->Handle,
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&gEfiLoadFile2ProtocolGuid,
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&PciIoDevice->LoadFile2,
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NULL
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);
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if (EFI_ERROR (Status)) {
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gBS->UninstallMultipleProtocolInterfaces (
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PciIoDevice->Handle,
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&gEfiDevicePathProtocolGuid,
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PciIoDevice->DevicePath,
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&gEfiPciIoProtocolGuid,
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&PciIoDevice->PciIo,
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NULL
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);
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return Status;
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}
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}
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if (!PciIoDevice->AllOpRomProcessed) {
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PciIoDevice->AllOpRomProcessed = TRUE;
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//
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// Dispatch the EFI OpRom for the PCI device.
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// The OpRom is got from platform in the above code
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// or loaded from device in the previous round of bus enumeration
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//
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if (HasEfiImage) {
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ProcessOpRomImage (PciIoDevice);
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}
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}
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if (PciIoDevice->BusOverride) {
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//
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// Install Bus Specific Driver Override Protocol
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//
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Status = gBS->InstallMultipleProtocolInterfaces (
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&PciIoDevice->Handle,
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&gEfiBusSpecificDriverOverrideProtocolGuid,
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&PciIoDevice->PciDriverOverride,
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NULL
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);
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if (EFI_ERROR (Status)) {
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gBS->UninstallMultipleProtocolInterfaces (
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PciIoDevice->Handle,
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&gEfiDevicePathProtocolGuid,
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PciIoDevice->DevicePath,
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&gEfiPciIoProtocolGuid,
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&PciIoDevice->PciIo,
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NULL
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);
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if (HasEfiImage) {
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gBS->UninstallMultipleProtocolInterfaces (
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PciIoDevice->Handle,
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&gEfiLoadFile2ProtocolGuid,
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&PciIoDevice->LoadFile2,
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NULL
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);
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}
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return Status;
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}
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}
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Status = gBS->OpenProtocol (
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Controller,
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&gEfiPciRootBridgeIoProtocolGuid,
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(VOID **) &(PciIoDevice->PciRootBridgeIo),
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gPciBusDriverBinding.DriverBindingHandle,
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PciIoDevice->Handle,
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EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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if (Handle != NULL) {
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*Handle = PciIoDevice->Handle;
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}
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//
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// Indicate the pci device is registered
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//
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PciIoDevice->Registered = TRUE;
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return EFI_SUCCESS;
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}
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/**
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This function is used to remove the whole PCI devices on the specified bridge from
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the root bridge.
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@param RootBridgeHandle The root bridge device handle.
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@param Bridge The bridge device to be removed.
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**/
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VOID
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RemoveAllPciDeviceOnBridge (
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EFI_HANDLE RootBridgeHandle,
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PCI_IO_DEVICE *Bridge
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)
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{
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LIST_ENTRY *CurrentLink;
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PCI_IO_DEVICE *Temp;
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while (!IsListEmpty (&Bridge->ChildList)) {
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CurrentLink = Bridge->ChildList.ForwardLink;
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Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
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//
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// Check if the current node has been deregistered before
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// If it is not, then deregister it
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//
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if (Temp->Registered) {
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DeRegisterPciDevice (RootBridgeHandle, Temp->Handle);
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}
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//
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// Remove this node from the linked list
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//
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RemoveEntryList (CurrentLink);
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if (!IsListEmpty (&Temp->ChildList)) {
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RemoveAllPciDeviceOnBridge (RootBridgeHandle, Temp);
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}
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FreePciDevice (Temp);
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}
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}
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/**
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This function is used to de-register the PCI IO device.
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That includes un-installing PciIo protocol from the specified PCI
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device handle.
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@param Controller An EFI handle for the PCI bus controller.
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@param Handle PCI device handle.
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@retval EFI_SUCCESS The PCI device is successfully de-registered.
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@retval other An error occurred when de-registering the PCI device.
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**/
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EFI_STATUS
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DeRegisterPciDevice (
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IN EFI_HANDLE Controller,
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IN EFI_HANDLE Handle
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)
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{
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EFI_PCI_IO_PROTOCOL *PciIo;
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EFI_STATUS Status;
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PCI_IO_DEVICE *PciIoDevice;
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PCI_IO_DEVICE *Node;
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LIST_ENTRY *CurrentLink;
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EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;
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Status = gBS->OpenProtocol (
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Handle,
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&gEfiPciIoProtocolGuid,
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(VOID **) &PciIo,
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gPciBusDriverBinding.DriverBindingHandle,
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Controller,
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EFI_OPEN_PROTOCOL_GET_PROTOCOL
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);
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if (!EFI_ERROR (Status)) {
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PciIoDevice = PCI_IO_DEVICE_FROM_PCI_IO_THIS (PciIo);
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//
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// If it is already de-registered
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//
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if (!PciIoDevice->Registered) {
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return EFI_SUCCESS;
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}
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//
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// If it is PPB, first de-register its children
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//
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if (!IsListEmpty (&PciIoDevice->ChildList)) {
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CurrentLink = PciIoDevice->ChildList.ForwardLink;
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while (CurrentLink != NULL && CurrentLink != &PciIoDevice->ChildList) {
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Node = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
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Status = DeRegisterPciDevice (Controller, Node->Handle);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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CurrentLink = CurrentLink->ForwardLink;
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}
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}
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//
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// Close the child handle
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//
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Status = gBS->CloseProtocol (
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Controller,
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&gEfiPciRootBridgeIoProtocolGuid,
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gPciBusDriverBinding.DriverBindingHandle,
|
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Handle
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);
|
|
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//
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// Un-install the Device Path protocol and PCI I/O protocol
|
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// and Bus Specific Driver Override protocol if needed.
|
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//
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if (PciIoDevice->BusOverride) {
|
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Status = gBS->UninstallMultipleProtocolInterfaces (
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Handle,
|
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&gEfiDevicePathProtocolGuid,
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PciIoDevice->DevicePath,
|
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&gEfiPciIoProtocolGuid,
|
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&PciIoDevice->PciIo,
|
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&gEfiBusSpecificDriverOverrideProtocolGuid,
|
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&PciIoDevice->PciDriverOverride,
|
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NULL
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);
|
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} else {
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Status = gBS->UninstallMultipleProtocolInterfaces (
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Handle,
|
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&gEfiDevicePathProtocolGuid,
|
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PciIoDevice->DevicePath,
|
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&gEfiPciIoProtocolGuid,
|
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&PciIoDevice->PciIo,
|
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NULL
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);
|
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}
|
|
|
|
if (!EFI_ERROR (Status)) {
|
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//
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// Try to uninstall LoadFile2 protocol if exists
|
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//
|
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Status = gBS->OpenProtocol (
|
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Handle,
|
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&gEfiLoadFile2ProtocolGuid,
|
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NULL,
|
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gPciBusDriverBinding.DriverBindingHandle,
|
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Controller,
|
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EFI_OPEN_PROTOCOL_TEST_PROTOCOL
|
|
);
|
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if (!EFI_ERROR (Status)) {
|
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Status = gBS->UninstallMultipleProtocolInterfaces (
|
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Handle,
|
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&gEfiLoadFile2ProtocolGuid,
|
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&PciIoDevice->LoadFile2,
|
|
NULL
|
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);
|
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}
|
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//
|
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// Restore Status
|
|
//
|
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Status = EFI_SUCCESS;
|
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}
|
|
|
|
|
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if (EFI_ERROR (Status)) {
|
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gBS->OpenProtocol (
|
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Controller,
|
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&gEfiPciRootBridgeIoProtocolGuid,
|
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(VOID **) &PciRootBridgeIo,
|
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gPciBusDriverBinding.DriverBindingHandle,
|
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Handle,
|
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EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
|
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);
|
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return Status;
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}
|
|
|
|
//
|
|
// 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;
|
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} else {
|
|
|
|
//
|
|
// Handle may be closed before
|
|
//
|
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return EFI_SUCCESS;
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
Start to manage the PCI device on the specified root bridge or PCI-PCI Bridge.
|
|
|
|
@param Controller The root bridge handle.
|
|
@param RootBridge A pointer to the PCI_IO_DEVICE.
|
|
@param RemainingDevicePath A pointer to the EFI_DEVICE_PATH_PROTOCOL.
|
|
@param NumberOfChildren Children number.
|
|
@param ChildHandleBuffer A pointer to the child handle buffer.
|
|
|
|
@retval EFI_NOT_READY Device is not allocated.
|
|
@retval EFI_UNSUPPORTED Device only support PCI-PCI bridge.
|
|
@retval EFI_NOT_FOUND Can not find the specific device.
|
|
@retval EFI_SUCCESS Success to start Pci devices on bridge.
|
|
|
|
**/
|
|
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
|
|
)
|
|
|
|
{
|
|
PCI_IO_DEVICE *PciIoDevice;
|
|
EFI_DEV_PATH_PTR Node;
|
|
EFI_DEVICE_PATH_PROTOCOL *CurrentDevicePath;
|
|
EFI_STATUS Status;
|
|
LIST_ENTRY *CurrentLink;
|
|
UINT64 Supports;
|
|
|
|
PciIoDevice = NULL;
|
|
CurrentLink = RootBridge->ChildList.ForwardLink;
|
|
|
|
while (CurrentLink != NULL && CurrentLink != &RootBridge->ChildList) {
|
|
|
|
PciIoDevice = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
|
|
if (RemainingDevicePath != NULL) {
|
|
|
|
Node.DevPath = RemainingDevicePath;
|
|
|
|
if (Node.Pci->Device != PciIoDevice->DeviceNumber ||
|
|
Node.Pci->Function != PciIoDevice->FunctionNumber) {
|
|
CurrentLink = CurrentLink->ForwardLink;
|
|
continue;
|
|
}
|
|
|
|
//
|
|
// Check if the device has been assigned with required resource
|
|
//
|
|
if (!PciIoDevice->Allocated) {
|
|
return EFI_NOT_READY;
|
|
}
|
|
|
|
//
|
|
// Check if the current node has been registered before
|
|
// If it is not, register it
|
|
//
|
|
if (!PciIoDevice->Registered) {
|
|
Status = RegisterPciDevice (
|
|
Controller,
|
|
PciIoDevice,
|
|
NULL
|
|
);
|
|
|
|
}
|
|
|
|
if (NumberOfChildren != NULL && ChildHandleBuffer != NULL && PciIoDevice->Registered) {
|
|
ChildHandleBuffer[*NumberOfChildren] = PciIoDevice->Handle;
|
|
(*NumberOfChildren)++;
|
|
}
|
|
|
|
//
|
|
// Get the next device path
|
|
//
|
|
CurrentDevicePath = NextDevicePathNode (RemainingDevicePath);
|
|
if (IsDevicePathEnd (CurrentDevicePath)) {
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
//
|
|
// If it is a PPB
|
|
//
|
|
if (IS_PCI_BRIDGE (&PciIoDevice->Pci)) {
|
|
Status = StartPciDevicesOnBridge (
|
|
Controller,
|
|
PciIoDevice,
|
|
CurrentDevicePath,
|
|
NumberOfChildren,
|
|
ChildHandleBuffer
|
|
);
|
|
|
|
PciIoDevice->PciIo.Attributes (
|
|
&(PciIoDevice->PciIo),
|
|
EfiPciIoAttributeOperationSupported,
|
|
0,
|
|
&Supports
|
|
);
|
|
Supports &= (UINT64)EFI_PCI_DEVICE_ENABLE;
|
|
PciIoDevice->PciIo.Attributes (
|
|
&(PciIoDevice->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 (!PciIoDevice->Registered && PciIoDevice->Allocated) {
|
|
Status = RegisterPciDevice (
|
|
Controller,
|
|
PciIoDevice,
|
|
NULL
|
|
);
|
|
|
|
}
|
|
|
|
if (NumberOfChildren != NULL && ChildHandleBuffer != NULL && PciIoDevice->Registered) {
|
|
ChildHandleBuffer[*NumberOfChildren] = PciIoDevice->Handle;
|
|
(*NumberOfChildren)++;
|
|
}
|
|
|
|
if (IS_PCI_BRIDGE (&PciIoDevice->Pci)) {
|
|
Status = StartPciDevicesOnBridge (
|
|
Controller,
|
|
PciIoDevice,
|
|
RemainingDevicePath,
|
|
NumberOfChildren,
|
|
ChildHandleBuffer
|
|
);
|
|
|
|
PciIoDevice->PciIo.Attributes (
|
|
&(PciIoDevice->PciIo),
|
|
EfiPciIoAttributeOperationSupported,
|
|
0,
|
|
&Supports
|
|
);
|
|
Supports &= (UINT64)EFI_PCI_DEVICE_ENABLE;
|
|
PciIoDevice->PciIo.Attributes (
|
|
&(PciIoDevice->PciIo),
|
|
EfiPciIoAttributeOperationEnable,
|
|
Supports,
|
|
NULL
|
|
);
|
|
|
|
}
|
|
|
|
CurrentLink = CurrentLink->ForwardLink;
|
|
}
|
|
}
|
|
|
|
if (PciIoDevice == NULL) {
|
|
return EFI_NOT_FOUND;
|
|
} else {
|
|
return EFI_SUCCESS;
|
|
}
|
|
}
|
|
|
|
/**
|
|
Start to manage all the PCI devices it found previously under
|
|
the entire host bridge.
|
|
|
|
@param Controller The root bridge handle.
|
|
|
|
@retval EFI_NOT_READY Device is not allocated.
|
|
@retval EFI_SUCCESS Success to start Pci device on host bridge.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
StartPciDevices (
|
|
IN EFI_HANDLE Controller
|
|
)
|
|
{
|
|
PCI_IO_DEVICE *RootBridge;
|
|
EFI_HANDLE ThisHostBridge;
|
|
LIST_ENTRY *CurrentLink;
|
|
|
|
RootBridge = GetRootBridgeByHandle (Controller);
|
|
ASSERT (RootBridge != NULL);
|
|
ThisHostBridge = RootBridge->PciRootBridgeIo->ParentHandle;
|
|
|
|
CurrentLink = mPciDevicePool.ForwardLink;
|
|
|
|
while (CurrentLink != NULL && CurrentLink != &mPciDevicePool) {
|
|
|
|
RootBridge = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
|
|
//
|
|
// Locate the right root bridge to start
|
|
//
|
|
if (RootBridge->PciRootBridgeIo->ParentHandle == ThisHostBridge) {
|
|
StartPciDevicesOnBridge (
|
|
RootBridge->Handle,
|
|
RootBridge,
|
|
NULL,
|
|
NULL,
|
|
NULL
|
|
);
|
|
}
|
|
|
|
CurrentLink = CurrentLink->ForwardLink;
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
Create root bridge device.
|
|
|
|
@param RootBridgeHandle Specified root bridge handle.
|
|
|
|
@return The crated root bridge device instance, NULL means no
|
|
root bridge device instance created.
|
|
|
|
**/
|
|
PCI_IO_DEVICE *
|
|
CreateRootBridge (
|
|
IN EFI_HANDLE RootBridgeHandle
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
PCI_IO_DEVICE *Dev;
|
|
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
|
|
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;
|
|
|
|
Dev = AllocateZeroPool (sizeof (PCI_IO_DEVICE));
|
|
if (Dev == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
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)) {
|
|
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
|
|
//
|
|
InitializePciIoInstance (Dev);
|
|
InitializePciDriverOverrideInstance (Dev);
|
|
InitializePciLoadFile2 (Dev);
|
|
|
|
//
|
|
// Initialize reserved resource list and
|
|
// option rom driver list
|
|
//
|
|
InitializeListHead (&Dev->ReservedResourceList);
|
|
InitializeListHead (&Dev->OptionRomDriverList);
|
|
|
|
return Dev;
|
|
}
|
|
|
|
/**
|
|
Get root bridge device instance by specific root bridge handle.
|
|
|
|
@param RootBridgeHandle Given root bridge handle.
|
|
|
|
@return The root bridge device instance, NULL means no root bridge
|
|
device instance found.
|
|
|
|
**/
|
|
PCI_IO_DEVICE *
|
|
GetRootBridgeByHandle (
|
|
EFI_HANDLE RootBridgeHandle
|
|
)
|
|
{
|
|
PCI_IO_DEVICE *RootBridgeDev;
|
|
LIST_ENTRY *CurrentLink;
|
|
|
|
CurrentLink = mPciDevicePool.ForwardLink;
|
|
|
|
while (CurrentLink != NULL && CurrentLink != &mPciDevicePool) {
|
|
|
|
RootBridgeDev = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
|
|
if (RootBridgeDev->Handle == RootBridgeHandle) {
|
|
return RootBridgeDev;
|
|
}
|
|
|
|
CurrentLink = CurrentLink->ForwardLink;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
Judge whether Pci device existed.
|
|
|
|
@param Bridge Parent bridge instance.
|
|
@param PciIoDevice Device instance.
|
|
|
|
@retval TRUE Pci device existed.
|
|
@retval FALSE Pci device did not exist.
|
|
|
|
**/
|
|
BOOLEAN
|
|
PciDeviceExisted (
|
|
IN PCI_IO_DEVICE *Bridge,
|
|
IN PCI_IO_DEVICE *PciIoDevice
|
|
)
|
|
{
|
|
|
|
PCI_IO_DEVICE *Temp;
|
|
LIST_ENTRY *CurrentLink;
|
|
|
|
CurrentLink = Bridge->ChildList.ForwardLink;
|
|
|
|
while (CurrentLink != NULL && 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;
|
|
}
|
|
|
|
/**
|
|
Get the active VGA device on the specified Host Bridge.
|
|
|
|
@param HostBridgeHandle Host Bridge handle.
|
|
|
|
@return The active VGA device on the specified Host Bridge.
|
|
|
|
**/
|
|
PCI_IO_DEVICE *
|
|
LocateVgaDeviceOnHostBridge (
|
|
IN EFI_HANDLE HostBridgeHandle
|
|
)
|
|
{
|
|
LIST_ENTRY *CurrentLink;
|
|
PCI_IO_DEVICE *PciIoDevice;
|
|
|
|
CurrentLink = mPciDevicePool.ForwardLink;
|
|
|
|
while (CurrentLink != NULL && CurrentLink != &mPciDevicePool) {
|
|
|
|
PciIoDevice = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
|
|
|
|
if (PciIoDevice->PciRootBridgeIo->ParentHandle== HostBridgeHandle) {
|
|
|
|
PciIoDevice = LocateVgaDevice (PciIoDevice);
|
|
|
|
if (PciIoDevice != NULL) {
|
|
return PciIoDevice;
|
|
}
|
|
}
|
|
|
|
CurrentLink = CurrentLink->ForwardLink;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
Locate the active VGA device under the bridge.
|
|
|
|
@param Bridge PCI IO instance for the bridge.
|
|
|
|
@return The active VGA device.
|
|
|
|
**/
|
|
PCI_IO_DEVICE *
|
|
LocateVgaDevice (
|
|
IN PCI_IO_DEVICE *Bridge
|
|
)
|
|
{
|
|
LIST_ENTRY *CurrentLink;
|
|
PCI_IO_DEVICE *PciIoDevice;
|
|
|
|
CurrentLink = Bridge->ChildList.ForwardLink;
|
|
|
|
while (CurrentLink != NULL && CurrentLink != &Bridge->ChildList) {
|
|
|
|
PciIoDevice = PCI_IO_DEVICE_FROM_LINK (CurrentLink);
|
|
|
|
if (IS_PCI_VGA(&PciIoDevice->Pci) &&
|
|
(PciIoDevice->Attributes &
|
|
(EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY |
|
|
EFI_PCI_IO_ATTRIBUTE_VGA_IO |
|
|
EFI_PCI_IO_ATTRIBUTE_VGA_IO_16)) != 0) {
|
|
return PciIoDevice;
|
|
}
|
|
|
|
if (IS_PCI_BRIDGE (&PciIoDevice->Pci)) {
|
|
|
|
PciIoDevice = LocateVgaDevice (PciIoDevice);
|
|
|
|
if (PciIoDevice != NULL) {
|
|
return PciIoDevice;
|
|
}
|
|
}
|
|
|
|
CurrentLink = CurrentLink->ForwardLink;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|