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edk2/NetworkPkg/MnpDxe/MnpDriver.h
Michael Kubacki 58de02af29 NetworkPkg: Replace include guards with #pragma once 
Replace traditional `#ifndef`/`#define`/`#endif` include guards with
`#pragma` once.

`#pragma once` is a widely supported preprocessor directive that
prevents header files from being included multiple times. It is
supported by all toolchains used to build edk2: GCC, Clang/LLVM, and
MSVC.

Compared to macro-based include guards, `#pragma once`:

- Eliminates the risk of macro name collisions or copy/paste errors
  where two headers inadvertently use the same guard macro.
- Eliminate inconsistency in the way include guard macros are named
  (e.g., some files use `__FILE_H__`, others use `FILE_H_`, etc.).
- Reduces boilerplate (three lines replaced by one).
- Avoids polluting the macro namespace with guard symbols.
- Can improve build times as the preprocessor can skip re-opening the
  file entirely, rather than re-reading it to find the matching
  `#endif` ("multiple-include optimization").
  - Note that some compilers may already optimize traditional include
    guards, by recognzining the idiomatic pattern.

This change is made acknowledging that overall portability of the
code will technically be reduced, as `#pragma once` is not part of the
C/C++ standards.

However, this is considered acceptable given:

1. edk2 already defines a subset of supported compilers in
   BaseTools/Conf/tools_def.template, all of which have supported
   `#pragma once` for over two decades.
2. There have been concerns raised to the project about inconsistent
   include guard naming and potential macro collisions.

Approximate compiler support dates:

- MSVC: Supported since Visual C++ 4.2 (1996)
- GCC: Supported since 3.4 (2004)
  (http://gnu.ist.utl.pt/software/gcc/gcc-3.4/changes.html)
- Clang (LLVM based): Since initial release in 2007

Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>
2026-02-23 21:01:28 +00:00

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/** @file
Declaration of structures and functions for MnpDxe driver.
Copyright (c) 2005 - 2016, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#pragma once
#include <Uefi.h>
#include <Protocol/ManagedNetwork.h>
#include <Protocol/SimpleNetwork.h>
#include <Protocol/ServiceBinding.h>
#include <Protocol/VlanConfig.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>
#include <Library/NetLib.h>
#include <Library/DpcLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/DevicePathLib.h>
#include <Library/PrintLib.h>
#include "ComponentName.h"
#define MNP_DEVICE_DATA_SIGNATURE SIGNATURE_32 ('M', 'n', 'p', 'D')
//
// Global Variables
//
extern EFI_DRIVER_BINDING_PROTOCOL gMnpDriverBinding;
typedef struct {
UINT32 Signature;
EFI_HANDLE ControllerHandle;
EFI_HANDLE ImageHandle;
EFI_VLAN_CONFIG_PROTOCOL VlanConfig;
UINTN NumberOfVlan;
CHAR16 *MacString;
EFI_SIMPLE_NETWORK_PROTOCOL *Snp;
//
// List of MNP_SERVICE_DATA
//
LIST_ENTRY ServiceList;
//
// Number of configured MNP Service Binding child
//
UINTN ConfiguredChildrenNumber;
LIST_ENTRY GroupAddressList;
UINT32 GroupAddressCount;
LIST_ENTRY FreeTxBufList;
LIST_ENTRY AllTxBufList;
UINT32 TxBufCount;
NET_BUF_QUEUE FreeNbufQue;
INTN NbufCnt;
EFI_EVENT PollTimer;
BOOLEAN EnableSystemPoll;
EFI_EVENT TimeoutCheckTimer;
EFI_EVENT MediaDetectTimer;
UINT32 UnicastCount;
UINT32 BroadcastCount;
UINT32 MulticastCount;
UINT32 PromiscuousCount;
//
// The size of the data buffer in the MNP_PACKET_BUFFER used to
// store a packet.
//
UINT32 BufferLength;
UINT32 PaddingSize;
NET_BUF *RxNbufCache;
} MNP_DEVICE_DATA;
#define MNP_DEVICE_DATA_FROM_THIS(a) \
CR ( \
(a), \
MNP_DEVICE_DATA, \
VlanConfig, \
MNP_DEVICE_DATA_SIGNATURE \
)
#define MNP_SERVICE_DATA_SIGNATURE SIGNATURE_32 ('M', 'n', 'p', 'S')
typedef struct {
UINT32 Signature;
LIST_ENTRY Link;
MNP_DEVICE_DATA *MnpDeviceData;
EFI_HANDLE ServiceHandle;
EFI_SERVICE_BINDING_PROTOCOL ServiceBinding;
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
LIST_ENTRY ChildrenList;
UINTN ChildrenNumber;
UINT32 Mtu;
UINT16 VlanId;
UINT8 Priority;
} MNP_SERVICE_DATA;
#define MNP_SERVICE_DATA_FROM_THIS(a) \
CR ( \
(a), \
MNP_SERVICE_DATA, \
ServiceBinding, \
MNP_SERVICE_DATA_SIGNATURE \
)
#define MNP_SERVICE_DATA_FROM_LINK(a) \
CR ( \
(a), \
MNP_SERVICE_DATA, \
Link, \
MNP_SERVICE_DATA_SIGNATURE \
)
/**
Test to see if this driver supports ControllerHandle. This service
is called by the EFI boot service ConnectController(). In
order to make drivers as small as possible, there are a few calling
restrictions for this service. ConnectController() must
follow these calling restrictions. If any other agent wishes to call
Supported() it must also follow these calling restrictions.
@param[in] This Protocol instance pointer.
@param[in] ControllerHandle Handle of device to test.
@param[in] RemainingDevicePath Optional parameter use to pick a specific
child device to start.
@retval EFI_SUCCESS This driver supports this device.
@retval EFI_ALREADY_STARTED This driver is already running on this device.
@retval Others This driver does not support this device.
**/
EFI_STATUS
EFIAPI
MnpDriverBindingSupported (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
);
/**
Start this driver on ControllerHandle. This service is called by the
EFI boot service ConnectController(). In order to make drivers as small
as possible, there are a few calling restrictions for this service.
ConnectController() must follow these calling restrictions. If any other
agent wishes to call Start() it must also follow these calling restrictions.
@param[in] This Protocol instance pointer.
@param[in] ControllerHandle Handle of device to bind driver to.
@param[in] RemainingDevicePath Optional parameter use to pick a specific
child device to start.
@retval EFI_SUCCESS This driver is added to ControllerHandle.
@retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory for Mnp Service Data.
@retval Others This driver does not support this device.
**/
EFI_STATUS
EFIAPI
MnpDriverBindingStart (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
);
/**
Stop this driver on ControllerHandle. This service is called by the
EFI boot service DisconnectController(). In order to make drivers as
small as possible, there are a few calling restrictions for this service.
DisconnectController() must follow these calling restrictions. If any other
agent wishes to call Stop() it must also follow these calling restrictions.
@param[in] This Protocol instance pointer.
@param[in] ControllerHandle Handle of device to stop driver on.
@param[in] NumberOfChildren Number of Handles in ChildHandleBuffer. If
number of children is zero stop the entire
bus driver.
@param[in] ChildHandleBuffer List of Child Handles to Stop.
@retval EFI_SUCCESS This driver is removed ControllerHandle.
@retval EFI_DEVICE_ERROR The device could not be stopped due to a device error.
**/
EFI_STATUS
EFIAPI
MnpDriverBindingStop (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer OPTIONAL
);
/**
Creates a child handle with a set of I/O services.
@param[in] This Protocol instance pointer.
@param[in, out] ChildHandle Pointer to the handle of the child to create. If
it is NULL, then a new handle is created. If
it is not NULL, then the I/O services are added
to the existing child handle.
@retval EFI_SUCCESS The protocol was added to ChildHandle.
@retval EFI_INVALID_PARAMETER ChildHandle is NULL.
@retval EFI_OUT_OF_RESOURCES There are not enough resources available to
create the child.
@retval Others The child handle was not created.
**/
EFI_STATUS
EFIAPI
MnpServiceBindingCreateChild (
IN EFI_SERVICE_BINDING_PROTOCOL *This,
IN OUT EFI_HANDLE *ChildHandle
);
/**
Destroys a child handle with a set of I/O services.
The DestroyChild() function does the opposite of CreateChild(). It removes a
protocol that was installed by CreateChild() from ChildHandle. If the removed
protocol is the last protocol on ChildHandle, then ChildHandle is destroyed.
@param[in] This Pointer to the EFI_SERVICE_BINDING_PROTOCOL
instance.
@param[in] ChildHandle Handle of the child to destroy.
@retval EFI_SUCCESS The protocol was removed from ChildHandle.
@retval EFI_UNSUPPORTED ChildHandle does not support the protocol that
is being removed.
@retval EFI_INVALID_PARAMETER ChildHandle is NULL.
@retval EFI_ACCESS_DENIED The protocol could not be removed from the
ChildHandle because its services are being
used.
@retval Others The child handle was not destroyed.
**/
EFI_STATUS
EFIAPI
MnpServiceBindingDestroyChild (
IN EFI_SERVICE_BINDING_PROTOCOL *This,
IN EFI_HANDLE ChildHandle
);
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