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267 lines
6.5 KiB
C
267 lines
6.5 KiB
C
/** @file
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Supporting functions declaration for PCI devices management.
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Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef _EFI_PCI_DEVICE_SUPPORT_H_
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#define _EFI_PCI_DEVICE_SUPPORT_H_
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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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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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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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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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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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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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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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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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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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Start to manage the PCI device on the specified root bridge or PCI-PCI Bridge.
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@param Controller The root bridge handle.
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@param RootBridge A pointer to the PCI_IO_DEVICE.
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@param RemainingDevicePath A pointer to the EFI_DEVICE_PATH_PROTOCOL.
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@param NumberOfChildren Children number.
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@param ChildHandleBuffer A pointer to the child handle buffer.
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@retval EFI_NOT_READY Device is not allocated.
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@retval EFI_UNSUPPORTED Device only support PCI-PCI bridge.
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@retval EFI_NOT_FOUND Can not find the specific device.
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@retval EFI_SUCCESS Success to start Pci devices on bridge.
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**/
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EFI_STATUS
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StartPciDevicesOnBridge (
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IN EFI_HANDLE Controller,
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IN PCI_IO_DEVICE *RootBridge,
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IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath,
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IN OUT UINT8 *NumberOfChildren,
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IN OUT EFI_HANDLE *ChildHandleBuffer
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);
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/**
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Start to manage all the PCI devices it found previously under
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the entire host bridge.
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@param Controller The root bridge handle.
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@retval EFI_NOT_READY Device is not allocated.
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@retval EFI_SUCCESS Success to start Pci device on host bridge.
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**/
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EFI_STATUS
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StartPciDevices (
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IN EFI_HANDLE Controller
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);
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/**
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Create root bridge device.
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@param RootBridgeHandle Specified root bridge handle.
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@return The crated root bridge device instance, NULL means no
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root bridge device instance created.
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**/
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PCI_IO_DEVICE *
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CreateRootBridge (
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IN EFI_HANDLE RootBridgeHandle
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);
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/**
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Get root bridge device instance by specific root bridge handle.
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@param RootBridgeHandle Given root bridge handle.
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@return The root bridge device instance, NULL means no root bridge
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device instance found.
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**/
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PCI_IO_DEVICE *
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GetRootBridgeByHandle (
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EFI_HANDLE RootBridgeHandle
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);
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/**
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Judge whether Pci device existed.
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@param Bridge Parent bridge instance.
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@param PciIoDevice Device instance.
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@retval TRUE Pci device existed.
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@retval FALSE Pci device did not exist.
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**/
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BOOLEAN
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PciDeviceExisted (
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IN PCI_IO_DEVICE *Bridge,
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IN PCI_IO_DEVICE *PciIoDevice
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);
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/**
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Get the active VGA device on the specified Host Bridge.
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@param HostBridgeHandle Host Bridge handle.
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@return The active VGA device on the specified Host Bridge.
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**/
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PCI_IO_DEVICE *
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LocateVgaDeviceOnHostBridge (
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IN EFI_HANDLE HostBridgeHandle
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);
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/**
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Locate the active VGA device under the bridge.
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@param Bridge PCI IO instance for the bridge.
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@return The active VGA device.
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**/
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PCI_IO_DEVICE *
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LocateVgaDevice (
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IN PCI_IO_DEVICE *Bridge
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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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#endif
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