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/** @file
Internal definitions for the virtio-net driver, which produces Simple Network
Protocol instances for virtio-net devices.
Copyright (C) 2013, Red Hat, Inc.
Copyright (c) 2017, AMD Inc, All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef _VIRTIO_NET_DXE_H_
#define _VIRTIO_NET_DXE_H_
#include <IndustryStandard/VirtioNet.h>
#include <Library/DebugLib.h>
#include <Library/VirtioLib.h>
#include <Protocol/ComponentName.h>
#include <Protocol/ComponentName2.h>
#include <Protocol/DevicePath.h>
#include <Protocol/DriverBinding.h>
#include <Protocol/SimpleNetwork.h>
#include <Library/OrderedCollectionLib.h>
#define VNET_SIG SIGNATURE_32 ('V', 'N', 'E', 'T')
//
// maximum number of pending packets, separately for each direction
//
#define VNET_MAX_PENDING 64
//
// State diagram:
//
// | ^
// | |
// BindingStart BindingStop
// +SnpPopulate |
// ++GetFeatures |
// | |
// v |
// +---------+ virtio-net device is reset, no resources are
// | stopped | allocated for traffic, but MAC address has
// +---------+ been retrieved
// | ^
// | |
// SNP.Start SNP.Stop
// | |
// v |
// +---------+
// | started | functionally identical to stopped
// +---------+
// | ^
// | |
// SNP.Initialize SNP.Shutdown
// | |
// v |
// +-------------+ Virtio-net setup complete, including DRIVER_OK
// | initialized | bit. The receive queue is populated with
// +-------------+ requests; McastIpToMac, GetStatus, Transmit,
// Receive are callable.
//
typedef struct {
//
// Parts of this structure are initialized / torn down in various functions
// at various call depths. The table to the right should make it easier to
// track them.
//
// field init function
// ------------------ ------------------------------
UINT32 Signature; // VirtioNetDriverBindingStart
VIRTIO_DEVICE_PROTOCOL *VirtIo; // VirtioNetDriverBindingStart
EFI_SIMPLE_NETWORK_PROTOCOL Snp; // VirtioNetSnpPopulate
EFI_SIMPLE_NETWORK_MODE Snm; // VirtioNetSnpPopulate
EFI_EVENT ExitBoot; // VirtioNetSnpPopulate
EFI_DEVICE_PATH_PROTOCOL *MacDevicePath; // VirtioNetDriverBindingStart
EFI_HANDLE MacHandle; // VirtioNetDriverBindingStart
VRING RxRing; // VirtioNetInitRing
VOID *RxRingMap; // VirtioRingMap and
// VirtioNetInitRing
UINT8 *RxBuf; // VirtioNetInitRx
UINT16 RxLastUsed; // VirtioNetInitRx
UINTN RxBufNrPages; // VirtioNetInitRx
EFI_PHYSICAL_ADDRESS RxBufDeviceBase; // VirtioNetInitRx
VOID *RxBufMap; // VirtioNetInitRx
VRING TxRing; // VirtioNetInitRing
VOID *TxRingMap; // VirtioRingMap and
// VirtioNetInitRing
UINT16 TxMaxPending; // VirtioNetInitTx
UINT16 TxCurPending; // VirtioNetInitTx
UINT16 *TxFreeStack; // VirtioNetInitTx
VIRTIO_1_0_NET_REQ *TxSharedReq; // VirtioNetInitTx
VOID *TxSharedReqMap; // VirtioNetInitTx
UINT16 TxLastUsed; // VirtioNetInitTx
ORDERED_COLLECTION *TxBufCollection; // VirtioNetInitTx
} VNET_DEV;
//
// In order to avoid duplication of interface documentation, please find all
// leading comments near the respective function / variable definitions (not
// the declarations here), which is where your code editor of choice takes you
// anyway when jumping to a function.
//
//
// utility macros
//
#define VIRTIO_NET_FROM_SNP(SnpPointer) \
CR (SnpPointer, VNET_DEV, Snp, VNET_SIG)
#define VIRTIO_CFG_WRITE(Dev, Field, Value) ((Dev)->VirtIo->WriteDevice ( \
(Dev)->VirtIo, \
OFFSET_OF_VNET (Field), \
SIZE_OF_VNET (Field), \
(Value) \
))
#define VIRTIO_CFG_READ(Dev, Field, Pointer) ((Dev)->VirtIo->ReadDevice ( \
(Dev)->VirtIo, \
OFFSET_OF_VNET (Field), \
SIZE_OF_VNET (Field), \
sizeof *(Pointer), \
(Pointer) \
))
//
// component naming
//
extern EFI_COMPONENT_NAME_PROTOCOL gVirtioNetComponentName;
extern EFI_COMPONENT_NAME2_PROTOCOL gVirtioNetComponentName2;
//
// driver binding
//
extern EFI_DRIVER_BINDING_PROTOCOL gVirtioNetDriverBinding;
//
// member functions implementing the Simple Network Protocol
//
EFI_STATUS
EFIAPI
VirtioNetStart (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This
);
EFI_STATUS
EFIAPI
VirtioNetStop (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This
);
EFI_STATUS
EFIAPI
VirtioNetInitialize (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
IN UINTN ExtraRxBufferSize OPTIONAL,
IN UINTN ExtraTxBufferSize OPTIONAL
);
EFI_STATUS
EFIAPI
VirtioNetReset (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
IN BOOLEAN ExtendedVerification
);
EFI_STATUS
EFIAPI
VirtioNetShutdown (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This
);
EFI_STATUS
EFIAPI
VirtioNetReceiveFilters (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
IN UINT32 Enable,
IN UINT32 Disable,
IN BOOLEAN ResetMCastFilter,
IN UINTN MCastFilterCnt OPTIONAL,
IN EFI_MAC_ADDRESS *MCastFilter OPTIONAL
);
EFI_STATUS
EFIAPI
VirtioNetStationAddress (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
IN BOOLEAN Reset,
IN EFI_MAC_ADDRESS *New OPTIONAL
);
EFI_STATUS
EFIAPI
VirtioNetStatistics (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
IN BOOLEAN Reset,
IN OUT UINTN *StatisticsSize OPTIONAL,
OUT EFI_NETWORK_STATISTICS *StatisticsTable OPTIONAL
);
EFI_STATUS
EFIAPI
VirtioNetMcastIpToMac (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
IN BOOLEAN IPv6,
IN EFI_IP_ADDRESS *Ip,
OUT EFI_MAC_ADDRESS *Mac
);
EFI_STATUS
EFIAPI
VirtioNetNvData (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
IN BOOLEAN ReadWrite,
IN UINTN Offset,
IN UINTN BufferSize,
IN OUT VOID *Buffer
);
EFI_STATUS
EFIAPI
VirtioNetGetStatus (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
OUT UINT32 *InterruptStatus OPTIONAL,
OUT VOID **TxBuf OPTIONAL
);
EFI_STATUS
EFIAPI
VirtioNetTransmit (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
IN UINTN HeaderSize,
IN UINTN BufferSize,
IN /* +OUT! */ VOID *Buffer,
IN EFI_MAC_ADDRESS *SrcAddr OPTIONAL,
IN EFI_MAC_ADDRESS *DestAddr OPTIONAL,
IN UINT16 *Protocol OPTIONAL
);
EFI_STATUS
EFIAPI
VirtioNetReceive (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
OUT UINTN *HeaderSize OPTIONAL,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer,
OUT EFI_MAC_ADDRESS *SrcAddr OPTIONAL,
OUT EFI_MAC_ADDRESS *DestAddr OPTIONAL,
OUT UINT16 *Protocol OPTIONAL
);
//
// utility functions shared by various SNP member functions
//
VOID
EFIAPI
VirtioNetShutdownRx (
IN OUT VNET_DEV *Dev
);
VOID
EFIAPI
VirtioNetShutdownTx (
IN OUT VNET_DEV *Dev
);
VOID
EFIAPI
VirtioNetUninitRing (
IN OUT VNET_DEV *Dev,
IN OUT VRING *Ring,
IN VOID *RingMap
);
//
// utility functions to map caller-supplied Tx buffer system physical address
// to a device address and vice versa
//
EFI_STATUS
EFIAPI
VirtioNetMapTxBuf (
IN VNET_DEV *Dev,
IN VOID *Buffer,
IN UINTN NumberOfBytes,
OUT EFI_PHYSICAL_ADDRESS *DeviceAddress
);
EFI_STATUS
EFIAPI
VirtioNetUnmapTxBuf (
IN VNET_DEV *Dev,
OUT VOID **Buffer,
IN EFI_PHYSICAL_ADDRESS DeviceAddress
);
INTN
EFIAPI
VirtioNetTxBufMapInfoCompare (
IN CONST VOID *UserStruct1,
IN CONST VOID *UserStruct2
);
INTN
EFIAPI
VirtioNetTxBufDeviceAddressCompare (
IN CONST VOID *StandaloneKey,
IN CONST VOID *UserStruct
);
//
// event callbacks
//
VOID
EFIAPI
VirtioNetIsPacketAvailable (
IN EFI_EVENT Event,
IN VOID *Context
);
VOID
EFIAPI
VirtioNetExitBoot (
IN EFI_EVENT Event,
IN VOID *Context
);
#endif // _VIRTIO_NET_DXE_H_
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