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84 lines
2.7 KiB
C
84 lines
2.7 KiB
C
/** @file
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Functions declaration for Bus Specific Driver Override protocol.
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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_DRIVER_OVERRRIDE_H_
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#define _EFI_PCI_DRIVER_OVERRRIDE_H_
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#define DRIVER_OVERRIDE_SIGNATURE SIGNATURE_32 ('d', 'r', 'o', 'v')
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//
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// PCI driver override driver image list
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//
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typedef struct {
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UINT32 Signature;
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LIST_ENTRY Link;
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EFI_HANDLE DriverImageHandle;
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EFI_DEVICE_PATH_PROTOCOL *DriverImagePath;
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} PCI_DRIVER_OVERRIDE_LIST;
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#define DRIVER_OVERRIDE_FROM_LINK(a) \
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CR (a, PCI_DRIVER_OVERRIDE_LIST, Link, DRIVER_OVERRIDE_SIGNATURE)
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/**
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Initializes a PCI Driver Override Instance.
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@param PciIoDevice PCI Device instance.
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**/
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VOID
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InitializePciDriverOverrideInstance (
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IN OUT PCI_IO_DEVICE *PciIoDevice
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);
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/**
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Add an overriding driver image.
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@param PciIoDevice Instance of PciIo device.
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@param DriverImageHandle Image handle of newly added driver image.
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@param DriverImagePath Device path of newly added driver image.
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@retval EFI_SUCCESS Successfully added driver.
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@retval EFI_OUT_OF_RESOURCES No memory resource for new driver instance.
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@retval other Some error occurred when locating gEfiLoadedImageProtocolGuid.
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**/
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EFI_STATUS
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AddDriver (
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IN PCI_IO_DEVICE *PciIoDevice,
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IN EFI_HANDLE DriverImageHandle,
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IN EFI_DEVICE_PATH_PROTOCOL *DriverImagePath
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);
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/**
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Uses a bus specific algorithm to retrieve a driver image handle for a controller.
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@param This A pointer to the EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_PROTOCOL instance.
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@param DriverImageHandle On input, a pointer to the previous driver image handle returned
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by GetDriver(). On output, a pointer to the next driver
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image handle. Passing in a NULL, will return the first driver
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image handle.
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@retval EFI_SUCCESS A bus specific override driver is returned in DriverImageHandle.
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@retval EFI_NOT_FOUND The end of the list of override drivers was reached.
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A bus specific override driver is not returned in DriverImageHandle.
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@retval EFI_INVALID_PARAMETER DriverImageHandle is not a handle that was returned on a
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previous call to GetDriver().
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**/
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EFI_STATUS
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EFIAPI
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GetDriver (
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IN EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_PROTOCOL *This,
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IN OUT EFI_HANDLE *DriverImageHandle
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);
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#endif
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