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audk/EmulatorPkg/EmuSnpDxe/EmuSnpDxe.c

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/** @file
Copyright (c) 2010, Apple, Inc. All rights reserved.<BR>
Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
EmuSnp.c
Abstract:
-**/
#include "EmuSnpDxe.h"
EFI_SIMPLE_NETWORK_PROTOCOL gEmuSnpTemplate = {
EFI_SIMPLE_NETWORK_PROTOCOL_REVISION,
EmuSnpStart,
EmuSnpStop,
EmuSnpInitialize,
EmuSnpReset,
EmuSnpShutdown,
EmuSnpReceiveFilters,
EmuSnpStationAddress,
EmuSnpStatistics,
EmuSnpMcastIptoMac,
EmuSnpNvdata,
EmuSnpGetStatus,
EmuSnpTransmit,
EmuSnpReceive,
NULL, // WaitForPacket
NULL // Mode
};
/**
Changes the state of a network interface from "stopped" to "started".
@param This Protocol instance pointer.
@retval EFI_SUCCESS Always succeeds.
**/
EFI_STATUS
EFIAPI
EmuSnpStart(
IN EFI_SIMPLE_NETWORK_PROTOCOL *This
)
{
EFI_STATUS Status;
EMU_SNP_PRIVATE_DATA *Private;
Private = EMU_SNP_PRIVATE_DATA_FROM_SNP_THIS (This);
Status = Private->Io->Start (Private->Io);
return Status;
}
/**
Changes the state of a network interface from "started" to "stopped".
@param This Protocol instance pointer.
@retval EFI_SUCCESS Always succeeds.
**/
EFI_STATUS
EFIAPI
EmuSnpStop (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This
)
{
EFI_STATUS Status;
EMU_SNP_PRIVATE_DATA *Private;
Private = EMU_SNP_PRIVATE_DATA_FROM_SNP_THIS (This);
Status = Private->Io->Stop (Private->Io);
return Status;
}
/**
Resets a network adapter and allocates the transmit and receive buffers
required by the network interface; optionally, also requests allocation
of additional transmit and receive buffers.
@param This Protocol instance pointer.
@param ExtraRxBufferSize The size, in bytes, of the extra receive buffer space
that the driver should allocate for the network interface.
Some network interfaces will not be able to use the extra
buffer, and the caller will not know if it is actually
being used.
@param ExtraTxBufferSize The size, in bytes, of the extra transmit buffer space
that the driver should allocate for the network interface.
Some network interfaces will not be able to use the extra
buffer, and the caller will not know if it is actually
being used.
@retval EFI_SUCCESS Always succeeds.
**/
EFI_STATUS
EFIAPI
EmuSnpInitialize (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
IN UINTN ExtraRxBufferSize OPTIONAL,
IN UINTN ExtraTxBufferSize OPTIONAL
)
{
EFI_STATUS Status;
EMU_SNP_PRIVATE_DATA *Private;
Private = EMU_SNP_PRIVATE_DATA_FROM_SNP_THIS (This);
Status = Private->Io->Initialize (Private->Io, ExtraRxBufferSize, ExtraTxBufferSize);
return Status;
}
/**
Resets a network adapter and re-initializes it with the parameters that were
provided in the previous call to Initialize().
@param This Protocol instance pointer.
@param ExtendedVerification Indicates that the driver may perform a more
exhaustive verification operation of the device
during reset.
@retval EFI_SUCCESS Always succeeds.
**/
EFI_STATUS
EFIAPI
EmuSnpReset (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
IN BOOLEAN ExtendedVerification
)
{
EFI_STATUS Status;
EMU_SNP_PRIVATE_DATA *Private;
Private = EMU_SNP_PRIVATE_DATA_FROM_SNP_THIS (This);
Status = Private->Io->Reset (Private->Io, ExtendedVerification);
return Status;
}
/**
Resets a network adapter and leaves it in a state that is safe for
another driver to initialize.
@param This Protocol instance pointer.
@retval EFI_SUCCESS Always succeeds.
**/
EFI_STATUS
EFIAPI
EmuSnpShutdown (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This
)
{
EFI_STATUS Status;
EMU_SNP_PRIVATE_DATA *Private;
Private = EMU_SNP_PRIVATE_DATA_FROM_SNP_THIS (This);
Status = Private->Io->Shutdown (Private->Io);
return Status;
}
/**
Manages the multicast receive filters of a network interface.
@param This Protocol instance pointer.
@param EnableBits A bit mask of receive filters to enable on the network interface.
@param DisableBits A bit mask of receive filters to disable on the network interface.
@param ResetMcastFilter Set to TRUE to reset the contents of the multicast receive
filters on the network interface to their default values.
@param McastFilterCount Number of multicast HW MAC addresses in the new
MCastFilter list. This value must be less than or equal to
the MCastFilterCnt field of EFI_SIMPLE_NETWORK_MODE. This
field is optional if ResetMCastFilter is TRUE.
@param McastFilter A pointer to a list of new multicast receive filter HW MAC
addresses. This list will replace any existing multicast
HW MAC address list. This field is optional if
ResetMCastFilter is TRUE.
@retval EFI_SUCCESS The multicast receive filter list was updated.
@retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
**/
EFI_STATUS
EFIAPI
EmuSnpReceiveFilters (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
IN UINT32 EnableBits,
IN UINT32 DisableBits,
IN BOOLEAN ResetMcastFilter,
IN UINTN McastFilterCount OPTIONAL,
IN EFI_MAC_ADDRESS *McastFilter OPTIONAL
)
{
EFI_STATUS Status;
EMU_SNP_PRIVATE_DATA *Private;
Private = EMU_SNP_PRIVATE_DATA_FROM_SNP_THIS (This);
Status = Private->Io->ReceiveFilters (
Private->Io,
EnableBits,
DisableBits,
ResetMcastFilter,
McastFilterCount,
McastFilter
);
return Status;
}
/**
Modifies or resets the current station address, if supported.
@param This Protocol instance pointer.
@param Reset Flag used to reset the station address to the network interfaces
permanent address.
@param NewMacAddr New station address to be used for the network interface.
@retval EFI_UNSUPPORTED Not supported yet.
**/
EFI_STATUS
EFIAPI
EmuSnpStationAddress (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
IN BOOLEAN Reset,
IN EFI_MAC_ADDRESS *NewMacAddr OPTIONAL
)
{
EFI_STATUS Status;
EMU_SNP_PRIVATE_DATA *Private;
Private = EMU_SNP_PRIVATE_DATA_FROM_SNP_THIS (This);
Status = Private->Io->StationAddress (Private->Io, Reset, NewMacAddr);
return Status;
}
/**
Resets or collects the statistics on a network interface.
@param This Protocol instance pointer.
@param Reset Set to TRUE to reset the statistics for the network interface.
@param StatisticsSize On input the size, in bytes, of StatisticsTable. On
output the size, in bytes, of the resulting table of
statistics.
@param StatisticsTable A pointer to the EFI_NETWORK_STATISTICS structure that
contains the statistics.
@retval EFI_SUCCESS The statistics were collected from the network interface.
@retval EFI_NOT_STARTED The network interface has not been started.
@retval EFI_BUFFER_TOO_SMALL The Statistics buffer was too small. The current buffer
size needed to hold the statistics is returned in
StatisticsSize.
@retval EFI_UNSUPPORTED Not supported yet.
**/
EFI_STATUS
EFIAPI
EmuSnpStatistics (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
IN BOOLEAN Reset,
IN OUT UINTN *StatisticsSize OPTIONAL,
OUT EFI_NETWORK_STATISTICS *StatisticsTable OPTIONAL
)
{
EFI_STATUS Status;
EMU_SNP_PRIVATE_DATA *Private;
Private = EMU_SNP_PRIVATE_DATA_FROM_SNP_THIS (This);
Status = Private->Io->Statistics (Private->Io, Reset, StatisticsSize, StatisticsTable);
return Status;
}
/**
Converts a multicast IP address to a multicast HW MAC address.
@param This Protocol instance pointer.
@param Ipv6 Set to TRUE if the multicast IP address is IPv6 [RFC 2460]. Set
to FALSE if the multicast IP address is IPv4 [RFC 791].
@param Ip The multicast IP address that is to be converted to a multicast
HW MAC address.
@param Mac The multicast HW MAC address that is to be generated from IP.
@retval EFI_SUCCESS The multicast IP address was mapped to the multicast
HW MAC address.
@retval EFI_NOT_STARTED The network interface has not been started.
@retval EFI_BUFFER_TOO_SMALL The Statistics buffer was too small. The current buffer
size needed to hold the statistics is returned in
StatisticsSize.
@retval EFI_UNSUPPORTED Not supported yet.
**/
EFI_STATUS
EFIAPI
EmuSnpMcastIptoMac (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
IN BOOLEAN Ipv6,
IN EFI_IP_ADDRESS *Ip,
OUT EFI_MAC_ADDRESS *Mac
)
{
EFI_STATUS Status;
EMU_SNP_PRIVATE_DATA *Private;
Private = EMU_SNP_PRIVATE_DATA_FROM_SNP_THIS (This);
Status = Private->Io->MCastIpToMac (Private->Io, Ipv6, Ip, Mac);
return Status;
}
/**
Performs read and write operations on the NVRAM device attached to a
network interface.
@param This Protocol instance pointer.
@param ReadOrWrite TRUE for read operations, FALSE for write operations.
@param Offset Byte offset in the NVRAM device at which to start the read or
write operation. This must be a multiple of NvRamAccessSize and
less than NvRamSize.
@param BufferSize The number of bytes to read or write from the NVRAM device.
This must also be a multiple of NvramAccessSize.
@param Buffer A pointer to the data buffer.
@retval EFI_UNSUPPORTED Not supported yet.
**/
EFI_STATUS
EFIAPI
EmuSnpNvdata (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
IN BOOLEAN ReadOrWrite,
IN UINTN Offset,
IN UINTN BufferSize,
IN OUT VOID *Buffer
)
{
EFI_STATUS Status;
EMU_SNP_PRIVATE_DATA *Private;
Private = EMU_SNP_PRIVATE_DATA_FROM_SNP_THIS (This);
Status = Private->Io->NvData (Private->Io, ReadOrWrite, Offset, BufferSize, Buffer);
return Status;
}
/**
Reads the current interrupt status and recycled transmit buffer status from
a network interface.
@param This Protocol instance pointer.
@param InterruptStatus A pointer to the bit mask of the currently active interrupts
If this is NULL, the interrupt status will not be read from
the device. If this is not NULL, the interrupt status will
be read from the device. When the interrupt status is read,
it will also be cleared. Clearing the transmit interrupt
does not empty the recycled transmit buffer array.
@param TxBuffer Recycled transmit buffer address. The network interface will
not transmit if its internal recycled transmit buffer array
is full. Reading the transmit buffer does not clear the
transmit interrupt. If this is NULL, then the transmit buffer
status will not be read. If there are no transmit buffers to
recycle and TxBuf is not NULL, * TxBuf will be set to NULL.
@retval EFI_SUCCESS Always succeeds.
**/
EFI_STATUS
EFIAPI
EmuSnpGetStatus (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
OUT UINT32 *InterruptStatus,
OUT VOID **TxBuffer
)
{
EFI_STATUS Status;
EMU_SNP_PRIVATE_DATA *Private;
Private = EMU_SNP_PRIVATE_DATA_FROM_SNP_THIS (This);
Status = Private->Io->GetStatus (Private->Io, InterruptStatus, TxBuffer);
return Status;
}
/**
Places a packet in the transmit queue of a network interface.
@param This Protocol instance pointer.
@param HeaderSize The size, in bytes, of the media header to be filled in by
the Transmit() function. If HeaderSize is non-zero, then it
must be equal to This->Mode->MediaHeaderSize and the DestAddr
and Protocol parameters must not be NULL.
@param BufferSize The size, in bytes, of the entire packet (media header and
data) to be transmitted through the network interface.
@param Buffer A pointer to the packet (media header followed by data) to be
transmitted. This parameter cannot be NULL. If HeaderSize is zero,
then the media header in Buffer must already be filled in by the
caller. If HeaderSize is non-zero, then the media header will be
filled in by the Transmit() function.
@param SrcAddr The source HW MAC address. If HeaderSize is zero, then this parameter
is ignored. If HeaderSize is non-zero and SrcAddr is NULL, then
This->Mode->CurrentAddress is used for the source HW MAC address.
@param DestAddr The destination HW MAC address. If HeaderSize is zero, then this
parameter is ignored.
@param Protocol The type of header to build. If HeaderSize is zero, then this
parameter is ignored. See RFC 1700, section "Ether Types", for
examples.
@retval EFI_SUCCESS The packet was placed on the transmit queue.
@retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
@retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
@retval EFI_NOT_STARTED The network interface has not been started.
**/
EFI_STATUS
EFIAPI
EmuSnpTransmit (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
IN UINTN HeaderSize,
IN UINTN BufferSize,
IN VOID* Buffer,
IN EFI_MAC_ADDRESS *SrcAddr OPTIONAL,
IN EFI_MAC_ADDRESS *DestAddr OPTIONAL,
IN UINT16 *Protocol OPTIONAL
)
{
EFI_STATUS Status;
EMU_SNP_PRIVATE_DATA *Private;
Private = EMU_SNP_PRIVATE_DATA_FROM_SNP_THIS (This);
Status = Private->Io->Transmit (
Private->Io,
HeaderSize,
BufferSize,
Buffer,
SrcAddr,
DestAddr,
Protocol
);
return Status;
}
/**
Receives a packet from a network interface.
@param This Protocol instance pointer.
@param HeaderSize The size, in bytes, of the media header received on the network
interface. If this parameter is NULL, then the media header size
will not be returned.
@param BuffSize On entry, the size, in bytes, of Buffer. On exit, the size, in
bytes, of the packet that was received on the network interface.
@param Buffer A pointer to the data buffer to receive both the media header and
the data.
@param SourceAddr The source HW MAC address. If this parameter is NULL, the
HW MAC source address will not be extracted from the media
header.
@param DestinationAddr The destination HW MAC address. If this parameter is NULL,
the HW MAC destination address will not be extracted from the
media header.
@param Protocol The media header type. If this parameter is NULL, then the
protocol will not be extracted from the media header. See
RFC 1700 section "Ether Types" for examples.
@retval EFI_SUCCESS The received data was stored in Buffer, and BufferSize has
been updated to the number of bytes received.
@retval EFI_NOT_READY The network interface is too busy to accept this transmit
request.
@retval EFI_NOT_STARTED The network interface has not been started.
@retval EFI_BUFFER_TOO_SMALL The BufferSize parameter is too small.
@retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
**/
EFI_STATUS
EFIAPI
EmuSnpReceive (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
OUT UINTN *HeaderSize OPTIONAL,
IN OUT UINTN *BuffSize,
OUT VOID *Buffer,
OUT EFI_MAC_ADDRESS *SourceAddr OPTIONAL,
OUT EFI_MAC_ADDRESS *DestinationAddr OPTIONAL,
OUT UINT16 *Protocol OPTIONAL
)
{
EFI_STATUS Status;
EMU_SNP_PRIVATE_DATA *Private;
Private = EMU_SNP_PRIVATE_DATA_FROM_SNP_THIS (This);
Status = Private->Io->Receive (
Private->Io,
HeaderSize,
BuffSize,
Buffer,
SourceAddr,
DestinationAddr,
Protocol
);
return Status;
}
/**
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 This Protocol instance pointer.
@param ControllerHandle Handle of device to test
@param RemainingDevicePath Optional parameter use to pick a specific child
device to start.
@retval EFI_SUCCESS This driver supports this device
@retval EFI_UNSUPPORTED This driver does not support this device
**/
EFI_STATUS
EFIAPI
EmuSnpDriverBindingSupported (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
)
{
EFI_STATUS Status;
EMU_IO_THUNK_PROTOCOL *EmuIoThunk;
MAC_ADDR_DEVICE_PATH *Node;
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
if (RemainingDevicePath != NULL) {
if (!IsDevicePathEnd (RemainingDevicePath)) {
Node = (MAC_ADDR_DEVICE_PATH *)RemainingDevicePath;
if (Node->Header.Type != MESSAGING_DEVICE_PATH ||
Node->Header.SubType != MSG_MAC_ADDR_DP) {
// If the remaining device path does not match we don't support the request
return EFI_UNSUPPORTED;
}
}
}
//
// Open the IO Abstraction(s) needed to perform the supported test
//
Status = gBS->OpenProtocol (
ControllerHandle,
&gEmuIoThunkProtocolGuid,
(VOID **)&EmuIoThunk,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Make sure GUID is for a File System handle.
//
Status = EFI_UNSUPPORTED;
if (CompareGuid (EmuIoThunk->Protocol, &gEmuSnpProtocolGuid)) {
Status = EFI_SUCCESS;
}
//
// Close the I/O Abstraction(s) used to perform the supported test
//
gBS->CloseProtocol (
ControllerHandle,
&gEmuIoThunkProtocolGuid,
This->DriverBindingHandle,
ControllerHandle
);
//
// Open the EFI Device Path protocol needed to perform the supported test
//
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiDevicePathProtocolGuid,
(VOID **) &ParentDevicePath,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (Status == EFI_ALREADY_STARTED) {
return EFI_SUCCESS;
}
if (EFI_ERROR (Status)) {
return Status;
}
//
// Close protocol, don't use device path protocol in the Support() function
//
gBS->CloseProtocol (
ControllerHandle,
&gEfiDevicePathProtocolGuid,
This->DriverBindingHandle,
ControllerHandle
);
return Status;
}
/**
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 This Protocol instance pointer.
@param ControllerHandle Handle of device to bind driver to
@param RemainingDevicePath Optional parameter use to pick a specific child
device to start.
@retval EFI_SUCCESS Always succeeds.
**/
EFI_STATUS
EFIAPI
EmuSnpDriverBindingStart (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
)
{
EFI_STATUS Status;
EMU_IO_THUNK_PROTOCOL *EmuIoThunk;
EMU_SNP_PRIVATE_DATA *Private;
MAC_ADDR_DEVICE_PATH Node;
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
Private = NULL;
//
// Grab the protocols we need
//
Status = gBS->OpenProtocol(
ControllerHandle,
&gEfiDevicePathProtocolGuid,
( VOID ** ) &ParentDevicePath,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status) && Status) {
return Status;
}
Status = gBS->OpenProtocol (
ControllerHandle,
&gEmuIoThunkProtocolGuid,
(VOID **)&EmuIoThunk,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status)) {
return Status;
}
if (!CompareGuid (EmuIoThunk->Protocol, &gEmuSnpProtocolGuid)) {
return EFI_UNSUPPORTED;
}
Status = EmuIoThunk->Open (EmuIoThunk);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Allocate the private data.
//
Private = AllocateZeroPool (sizeof (EMU_SNP_PRIVATE_DATA));
if (Private == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
CopyMem (&Private->Snp, &gEmuSnpTemplate, sizeof (EFI_SIMPLE_NETWORK_PROTOCOL));
Private->Signature = EMU_SNP_PRIVATE_DATA_SIGNATURE;
Private->IoThunk = EmuIoThunk;
Private->Io = EmuIoThunk->Interface;
Private->EfiHandle = ControllerHandle;
Private->DeviceHandle = NULL;
Private->Snp.Mode = &Private->Mode;
Private->ControllerNameTable = NULL;
Status = Private->Io->CreateMapping (Private->Io, &Private->Mode);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Build the device path by appending the MAC node to the ParentDevicePath
// from the EmuIo handle.
//
ZeroMem (&Node, sizeof (MAC_ADDR_DEVICE_PATH));
Node.Header.Type = MESSAGING_DEVICE_PATH;
Node.Header.SubType = MSG_MAC_ADDR_DP;
Node.IfType = Private->Mode.IfType;
SetDevicePathNodeLength ((EFI_DEVICE_PATH_PROTOCOL * )&Node, sizeof (MAC_ADDR_DEVICE_PATH));
CopyMem (&Node.MacAddress, &Private->Mode.CurrentAddress, sizeof (EFI_MAC_ADDRESS));
//
// Build the device path by appending the MAC node to the ParentDevicePath from the EmuIo handle.
//
Private->DevicePath = AppendDevicePathNode (ParentDevicePath, (EFI_DEVICE_PATH_PROTOCOL *)&Node);
if ( Private->DevicePath == NULL ) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
AddUnicodeString2 (
"eng",
gEmuSnpDriverComponentName.SupportedLanguages,
&Private->ControllerNameTable,
EmuIoThunk->ConfigString,
TRUE
);
AddUnicodeString2 (
"en",
gEmuSnpDriverComponentName2.SupportedLanguages,
&Private->ControllerNameTable,
EmuIoThunk->ConfigString,
FALSE
);
//
// Create Child Handle
//
Status = gBS->InstallMultipleProtocolInterfaces(
&Private->DeviceHandle,
&gEfiSimpleNetworkProtocolGuid, &Private->Snp,
&gEfiDevicePathProtocolGuid, Private->DevicePath,
NULL
);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Open For Child Device
//
Status = gBS->OpenProtocol (
ControllerHandle,
&gEmuIoThunkProtocolGuid,
(VOID **)&EmuIoThunk,
This->DriverBindingHandle,
Private->DeviceHandle,
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
);
Done:
if (EFI_ERROR (Status)) {
if (Private != NULL) {
FreePool (Private);
}
if (ParentDevicePath != NULL) {
gBS->CloseProtocol(
ControllerHandle,
&gEfiDevicePathProtocolGuid,
This->DriverBindingHandle,
ControllerHandle
);
}
}
return Status;
}
/**
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 This Protocol instance pointer.
@param ControllerHandle Handle of device to stop driver on
@param NumberOfChildren Number of Handles in ChildHandleBuffer. If number of
children is zero stop the entire bus driver.
@param ChildHandleBuffer List of Child Handles to Stop.
@retval EFI_SUCCESS Always succeeds.
**/
EFI_STATUS
EFIAPI
EmuSnpDriverBindingStop (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer
)
{
EFI_STATUS Status;
EMU_SNP_PRIVATE_DATA *Private = NULL;
EFI_SIMPLE_NETWORK_PROTOCOL *Snp;
//
// Complete all outstanding transactions to Controller.
// Don't allow any new transaction to Controller to be started.
//
if (NumberOfChildren == 0) {
//
// Close the bus driver
//
Status = gBS->CloseProtocol (
ControllerHandle,
&gEmuIoThunkProtocolGuid,
This->DriverBindingHandle,
ControllerHandle
);
Status = gBS->CloseProtocol (
ControllerHandle,
&gEfiDevicePathProtocolGuid,
This->DriverBindingHandle,
ControllerHandle
);
return Status;
}
ASSERT (NumberOfChildren == 1);
//
// Get our context back.
//
Status = gBS->OpenProtocol(
ChildHandleBuffer[0],
&gEfiSimpleNetworkProtocolGuid,
( VOID ** ) &Snp,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
return EFI_DEVICE_ERROR;
}
Private = EMU_SNP_PRIVATE_DATA_FROM_SNP_THIS (Snp);
Status = Private->IoThunk->Close (Private->IoThunk);
Status = gBS->CloseProtocol(
ChildHandleBuffer[0],
&gEmuIoThunkProtocolGuid,
This->DriverBindingHandle,
Private->DeviceHandle
);
Status = gBS->UninstallMultipleProtocolInterfaces(
ChildHandleBuffer[0],
&gEfiSimpleNetworkProtocolGuid, &Private->Snp,
&gEfiDevicePathProtocolGuid, Private->DevicePath,
NULL
);
FreePool (Private->DevicePath);
FreeUnicodeStringTable (Private->ControllerNameTable);
FreePool (Private);
return EFI_SUCCESS;
}
EFI_DRIVER_BINDING_PROTOCOL gEmuSnpDriverBinding = {
EmuSnpDriverBindingSupported,
EmuSnpDriverBindingStart,
EmuSnpDriverBindingStop,
0xA,
NULL,
NULL
};
/**
This is the declaration of an EFI image entry point. This entry point is
the same for UEFI Applications, UEFI OS Loaders, and UEFI Drivers including
both device drivers and bus drivers.
@param ImageHandle The firmware allocated handle for the UEFI image.
@param SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
**/
EFI_STATUS
EFIAPI
InitializeEmuSnpDriver (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
//
// Install the Driver Protocols
//
Status = EfiLibInstallDriverBindingComponentName2(
ImageHandle,
SystemTable,
&gEmuSnpDriverBinding,
ImageHandle,
&gEmuSnpDriverComponentName,
&gEmuSnpDriverComponentName2
);
return Status;
}
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