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system76-edk2/EmbeddedPkg/Drivers/Lan9118Dxe/Lan9118Dxe.c
Ronald Cron 6382e5df4e EmbeddedPkg/Lan9118Dxe: Remove link check in SNP initialization 
The UEFI specification does not require the initialisation and reset
interface to check if an Ethernet cable is connected or not, and provides
the GetStatus() interface to do this. Furthermore, the 'Managed Network
Protocol' take care of the cable connection check in edk2 network stack.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Reviewed-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16326 6f19259b-4bc3-4df7-8a09-765794883524
2014-11-11 00:49:50 +00:00

1499 lines
46 KiB
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/** @file
*
* Copyright (c) 2012-2014, ARM Limited. All rights reserved.
*
* 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.
*
**/
#include "Lan9118Dxe.h"
typedef struct {
MAC_ADDR_DEVICE_PATH Lan9118;
EFI_DEVICE_PATH_PROTOCOL End;
} LAN9118_DEVICE_PATH;
LAN9118_DEVICE_PATH Lan9118PathTemplate = {
{
{
MESSAGING_DEVICE_PATH, MSG_MAC_ADDR_DP,
{ (UINT8) (sizeof(MAC_ADDR_DEVICE_PATH)), (UINT8) ((sizeof(MAC_ADDR_DEVICE_PATH)) >> 8) }
},
{ { 0 } },
0
},
{
END_DEVICE_PATH_TYPE,
END_ENTIRE_DEVICE_PATH_SUBTYPE,
{ sizeof(EFI_DEVICE_PATH_PROTOCOL), 0 }
}
};
/*
** Entry point for the LAN9118 driver
**
*/
EFI_STATUS
Lan9118DxeEntry (
IN EFI_HANDLE Handle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
LAN9118_DRIVER *LanDriver;
EFI_SIMPLE_NETWORK_PROTOCOL *Snp;
EFI_SIMPLE_NETWORK_MODE *SnpMode;
LAN9118_DEVICE_PATH *Lan9118Path;
EFI_HANDLE ControllerHandle;
// The PcdLan9118DxeBaseAddress PCD must be defined
ASSERT (PcdGet32 (PcdLan9118DxeBaseAddress) != 0);
// Allocate Resources
LanDriver = AllocateZeroPool (sizeof (LAN9118_DRIVER));
if (LanDriver == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Lan9118Path = (LAN9118_DEVICE_PATH*)AllocateCopyPool (sizeof (LAN9118_DEVICE_PATH), &Lan9118PathTemplate);
if (Lan9118Path == NULL) {
return EFI_OUT_OF_RESOURCES;
}
// Initialize pointers
Snp = &(LanDriver->Snp);
SnpMode = &(LanDriver->SnpMode);
Snp->Mode = SnpMode;
// Set the signature of the LAN Driver structure
LanDriver->Signature = LAN9118_SIGNATURE;
// Assign fields and func pointers
Snp->Revision = EFI_SIMPLE_NETWORK_PROTOCOL_REVISION;
Snp->WaitForPacket = NULL;
Snp->Initialize = SnpInitialize;
Snp->Start = SnpStart;
Snp->Stop = SnpStop;
Snp->Reset = SnpReset;
Snp->Shutdown = SnpShutdown;
Snp->ReceiveFilters = SnpReceiveFilters;
Snp->StationAddress = SnpStationAddress;
Snp->Statistics = SnpStatistics;
Snp->MCastIpToMac = SnpMcastIptoMac;
Snp->NvData = SnpNvData;
Snp->GetStatus = SnpGetStatus;
Snp->Transmit = SnpTransmit;
Snp->Receive = SnpReceive;
// Start completing simple network mode structure
SnpMode->State = EfiSimpleNetworkStopped;
SnpMode->HwAddressSize = NET_ETHER_ADDR_LEN; // HW address is 6 bytes
SnpMode->MediaHeaderSize = sizeof(ETHER_HEAD); // Not sure of this
SnpMode->MaxPacketSize = EFI_PAGE_SIZE; // Preamble + SOF + Ether Frame (with VLAN tag +4bytes)
SnpMode->NvRamSize = 0; // No NVRAM with this device
SnpMode->NvRamAccessSize = 0; // No NVRAM with this device
//
// Claim that all receive filter settings are supported, though the MULTICAST mode
// is not completely supported. The LAN9118 Ethernet controller is only able to
// do a "hash filtering" and not a perfect filtering on multicast addresses. The
// controller does not filter the multicast addresses directly but a hash value
// of them. The hash value of a multicast address is derived from its CRC and
// ranges from 0 to 63 included.
// We claim that the perfect MULTICAST filtering mode is supported because
// we do not want the user to switch directly to the PROMISCOUS_MULTICAST mode
// and thus not being able to take advantage of the hash filtering.
//
SnpMode->ReceiveFilterMask = EFI_SIMPLE_NETWORK_RECEIVE_UNICAST |
EFI_SIMPLE_NETWORK_RECEIVE_MULTICAST |
EFI_SIMPLE_NETWORK_RECEIVE_BROADCAST |
EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS |
EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS_MULTICAST;
// We do not intend to receive anything for the time being.
SnpMode->ReceiveFilterSetting = 0;
// LAN9118 has 64bit hash table, can filter 64 MCast MAC Addresses
SnpMode->MaxMCastFilterCount = MAX_MCAST_FILTER_CNT;
SnpMode->MCastFilterCount = 0;
ZeroMem (&SnpMode->MCastFilter, MAX_MCAST_FILTER_CNT * sizeof(EFI_MAC_ADDRESS));
// Set the interface type (1: Ethernet or 6: IEEE 802 Networks)
SnpMode->IfType = NET_IFTYPE_ETHERNET;
// Mac address is changeable as it is loaded from erasable memory
SnpMode->MacAddressChangeable = TRUE;
// Can only transmit one packet at a time
SnpMode->MultipleTxSupported = FALSE;
// MediaPresent checks for cable connection and partner link
SnpMode->MediaPresentSupported = TRUE;
SnpMode->MediaPresent = FALSE;
// Set broadcast address
SetMem (&SnpMode->BroadcastAddress, sizeof (EFI_MAC_ADDRESS), 0xFF);
// Power up the device so we can find the MAC address
Status = Lan9118Initialize (Snp);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Lan9118: Error initialising hardware\n"));
return EFI_DEVICE_ERROR;
}
// Assign fields for device path
CopyMem (&Lan9118Path->Lan9118.MacAddress, &Snp->Mode->CurrentAddress, NET_ETHER_ADDR_LEN);
Lan9118Path->Lan9118.IfType = Snp->Mode->IfType;
// Initialise the protocol
ControllerHandle = NULL;
Status = gBS->InstallMultipleProtocolInterfaces (
&ControllerHandle,
&gEfiSimpleNetworkProtocolGuid, Snp,
&gEfiDevicePathProtocolGuid, Lan9118Path,
NULL
);
// Say what the status of loading the protocol structure is
if (EFI_ERROR(Status)) {
FreePool (LanDriver);
} else {
LanDriver->ControllerHandle = ControllerHandle;
}
return Status;
}
/*
* UEFI Start() function
*
* Parameters:
*
* @param Snp: A pointer to the EFI_SIMPLE_NETWORK_PROTOCOL instance.
*
* Description:
*
* This function starts a network interface. If the network interface successfully starts, then
* EFI_SUCCESS will be returned.
*/
EFI_STATUS
EFIAPI
SnpStart (
IN EFI_SIMPLE_NETWORK_PROTOCOL *Snp
)
{
// Check Snp instance
if (Snp == NULL) {
return EFI_INVALID_PARAMETER;
}
// Check state
if ((Snp->Mode->State == EfiSimpleNetworkStarted) ||
(Snp->Mode->State == EfiSimpleNetworkInitialized) ) {
return EFI_ALREADY_STARTED;
}
// Change state
Snp->Mode->State = EfiSimpleNetworkStarted;
return EFI_SUCCESS;
}
/*
* UEFI Stop() function
*
*/
EFI_STATUS
EFIAPI
SnpStop (
IN EFI_SIMPLE_NETWORK_PROTOCOL* Snp
)
{
// Check Snp Instance
if (Snp == NULL) {
return EFI_INVALID_PARAMETER;
}
// Check state of the driver
if (Snp->Mode->State == EfiSimpleNetworkStopped) {
return EFI_NOT_STARTED;
}
// Stop the Tx and Rx
StopTx (STOP_TX_CFG | STOP_TX_MAC, Snp);
StopRx (0, Snp);
// Change the state
switch (Snp->Mode->State) {
case EfiSimpleNetworkStarted:
case EfiSimpleNetworkInitialized:
Snp->Mode->State = EfiSimpleNetworkStopped;
break;
default:
return EFI_DEVICE_ERROR;
}
// Put the device into a power saving mode ?
return EFI_SUCCESS;
}
// Allocated receive and transmit buffers
STATIC UINT32 gTxBuffer = 0;
/*
* UEFI Initialize() function
*
*/
EFI_STATUS
EFIAPI
SnpInitialize (
IN EFI_SIMPLE_NETWORK_PROTOCOL* Snp,
IN UINTN RxBufferSize OPTIONAL,
IN UINTN TxBufferSize OPTIONAL
)
{
EFI_STATUS Status;
UINT32 PmConf;
INT32 AllocResult;
UINT32 RxStatusSize;
UINT32 TxStatusSize;
// Initialize variables
// Global variables to hold tx and rx FIFO allocation
gTxBuffer = 0;
// Check Snp Instance
if (Snp == NULL) {
return EFI_INVALID_PARAMETER;
}
// First check that driver has not already been initialized
if (Snp->Mode->State == EfiSimpleNetworkInitialized) {
DEBUG ((EFI_D_WARN, "LAN9118 Driver already initialized\n"));
return EFI_SUCCESS;
} else
if (Snp->Mode->State == EfiSimpleNetworkStopped) {
DEBUG ((EFI_D_WARN, "LAN9118 Driver not started\n"));
return EFI_NOT_STARTED;
}
// Initiate a PHY reset
Status = PhySoftReset (PHY_RESET_PMT, Snp);
if (EFI_ERROR (Status)) {
Snp->Mode->State = EfiSimpleNetworkStopped;
DEBUG ((EFI_D_WARN, "Warning: Link not ready after TimeOut. Check ethernet cable\n"));
return EFI_NOT_STARTED;
}
// Initiate a software reset
Status = SoftReset (0, Snp);
if (EFI_ERROR(Status)) {
DEBUG ((EFI_D_WARN, "Soft Reset Failed: Hardware Error\n"));
return EFI_DEVICE_ERROR;
}
// Read the PM register
PmConf = MmioRead32 (LAN9118_PMT_CTRL);
// MPTCTRL_WOL_EN: Allow Wake-On-Lan to detect wake up frames or magic packets
// MPTCTRL_ED_EN: Allow energy detection to allow lowest power consumption mode
// MPTCTRL_PME_EN: Allow Power Management Events
PmConf = 0;
PmConf |= (MPTCTRL_WOL_EN | MPTCTRL_ED_EN | MPTCTRL_PME_EN);
// Write the current configuration to the register
MmioWrite32 (LAN9118_PMT_CTRL, PmConf);
gBS->Stall (LAN9118_STALL);
gBS->Stall (LAN9118_STALL);
// Configure GPIO and HW
Status = ConfigureHardware (HW_CONF_USE_LEDS, Snp);
if (EFI_ERROR(Status)) {
return Status;
}
// Assign the transmitter buffer size (default values)
TxStatusSize = LAN9118_TX_STATUS_SIZE;
RxStatusSize = LAN9118_RX_STATUS_SIZE;
// Check that a buff size was specified
if (TxBufferSize > 0) {
if (RxBufferSize == 0) {
RxBufferSize = LAN9118_RX_DATA_SIZE;
}
AllocResult = ChangeFifoAllocation (
ALLOC_USE_FIFOS,
&TxBufferSize,
&RxBufferSize,
&TxStatusSize,
&RxStatusSize,
Snp
);
if (AllocResult < 0) {
return EFI_OUT_OF_RESOURCES;
}
}
// Do auto-negotiation if supported
Status = AutoNegotiate (AUTO_NEGOTIATE_ADVERTISE_ALL, Snp);
if (EFI_ERROR(Status)) {
DEBUG ((EFI_D_WARN, "Lan9118: Auto Negociation not supported.\n"));
}
// Configure flow control depending on speed capabilities
Status = ConfigureFlow (0, 0, 0, 0, Snp);
if (EFI_ERROR(Status)) {
return Status;
}
// Enable the transmitter
Status = StartTx (START_TX_MAC | START_TX_CFG, Snp);
if (EFI_ERROR(Status)) {
return Status;
}
// Now acknowledge all interrupts
MmioWrite32 (LAN9118_INT_STS, ~0);
// Declare the driver as initialized
Snp->Mode->State = EfiSimpleNetworkInitialized;
return Status;
}
/*
* UEFI Reset () function
*
*/
EFI_STATUS
EFIAPI
SnpReset (
IN EFI_SIMPLE_NETWORK_PROTOCOL* Snp,
IN BOOLEAN Verification
)
{
UINT32 PmConf;
UINT32 HwConf;
UINT32 ResetFlags;
EFI_STATUS Status;
PmConf = 0;
HwConf = 0;
ResetFlags = 0;
// Check Snp Instance
if (Snp == NULL) {
return EFI_INVALID_PARAMETER;
}
// First check that driver has not already been initialized
if (Snp->Mode->State == EfiSimpleNetworkStarted) {
DEBUG ((EFI_D_WARN, "Warning: LAN9118 Driver not yet initialized\n"));
return EFI_DEVICE_ERROR;
} else if (Snp->Mode->State == EfiSimpleNetworkStopped) {
DEBUG ((EFI_D_WARN, "Warning: LAN9118 Driver not started\n"));
return EFI_NOT_STARTED;
}
// Initiate a PHY reset
Status = PhySoftReset (PHY_RESET_PMT, Snp);
if (EFI_ERROR (Status)) {
Snp->Mode->State = EfiSimpleNetworkStopped;
return EFI_NOT_STARTED;
}
// Initiate a software reset
ResetFlags |= SOFT_RESET_CHECK_MAC_ADDR_LOAD | SOFT_RESET_CLEAR_INT;
if (Verification) {
ResetFlags |= SOFT_RESET_SELF_TEST;
}
Status = SoftReset (ResetFlags, Snp);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_WARN, "Warning: Soft Reset Failed: Hardware Error\n"));
return EFI_DEVICE_ERROR;
}
// Read the PM register
PmConf = MmioRead32 (LAN9118_PMT_CTRL);
// MPTCTRL_WOL_EN: Allow Wake-On-Lan to detect wake up frames or magic packets
// MPTCTRL_ED_EN: Allow energy detection to allow lowest power consumption mode
// MPTCTRL_PME_EN: Allow Power Management Events
PmConf |= (MPTCTRL_WOL_EN | MPTCTRL_ED_EN | MPTCTRL_PME_EN);
// Write the current configuration to the register
MmioWrite32 (LAN9118_PMT_CTRL, PmConf);
gBS->Stall (LAN9118_STALL);
// Check that a buffer size was specified in SnpInitialize
if (gTxBuffer != 0) {
HwConf = MmioRead32 (LAN9118_HW_CFG); // Read the HW register
HwConf &= ~HW_CFG_TX_FIFO_SIZE_MASK; // Clear buffer bits first
HwConf |= HW_CFG_TX_FIFO_SIZE(gTxBuffer); // assign size chosen in SnpInitialize
MmioWrite32 (LAN9118_HW_CFG, HwConf); // Write the conf
gBS->Stall (LAN9118_STALL);
}
// Enable the receiver and transmitter and clear their contents
StartRx (START_RX_CLEAR, Snp);
StartTx (START_TX_MAC | START_TX_CFG | START_TX_CLEAR, Snp);
// Now acknowledge all interrupts
MmioWrite32 (LAN9118_INT_STS, ~0);
return EFI_SUCCESS;
}
/*
* UEFI Shutdown () function
*
*/
EFI_STATUS
EFIAPI
SnpShutdown (
IN EFI_SIMPLE_NETWORK_PROTOCOL* Snp
)
{
EFI_STATUS Status;
// Check Snp Instance
if (Snp == NULL) {
return EFI_INVALID_PARAMETER;
}
// First check that driver has not already been initialized
if (Snp->Mode->State == EfiSimpleNetworkStarted) {
DEBUG ((EFI_D_WARN, "Warning: LAN9118 Driver not yet initialized\n"));
return EFI_DEVICE_ERROR;
} else if (Snp->Mode->State == EfiSimpleNetworkStopped) {
DEBUG ((EFI_D_WARN, "Warning: LAN9118 Driver not started\n"));
return EFI_NOT_STARTED;
}
// Initiate a PHY reset
Status = PhySoftReset (PHY_RESET_PMT, Snp);
if (EFI_ERROR (Status)) {
return Status;
}
// Initiate a software reset
Status = SoftReset (0, Snp);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_WARN, "Warning: Soft Reset Failed: Hardware Error\n"));
return Status;
}
// Back to the started and thus not initialized state
Snp->Mode->State = EfiSimpleNetworkStarted;
return EFI_SUCCESS;
}
/**
Enable and/or disable the receive filters of the LAN9118
Please refer to the UEFI specification for the precedence rules among the
Enable, Disable and ResetMCastFilter parameters.
@param[in] Snp A pointer to the EFI_SIMPLE_NETWORK_PROTOCOL
instance.
@param[in] Enable A bit mask of receive filters to enable.
@param[in] Disable A bit mask of receive filters to disable.
@param[in] ResetMCastFilter Set to TRUE to reset the contents of the multicast
receive filters on the network interface to
their default values.
@param[in] MCastFilterCnt 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[in] 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 receive filters of the LAN9118 were updated.
@retval EFI_NOT_STARTED The LAN9118 has not been started.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE :
. This is NULL
. Multicast is being enabled (the
EFI_SIMPLE_NETWORK_RECEIVE_MULTICAST bit is set in
Enable, it is not set in Disable, and ResetMCastFilter
is FALSE) and MCastFilterCount is zero.
. Multicast is being enabled and MCastFilterCount is
greater than Snp->Mode->MaxMCastFilterCount.
. Multicast is being enabled and MCastFilter is NULL
. Multicast is being enabled and one or more of the
addresses in the MCastFilter list are not valid
multicast MAC addresses.
@retval EFI_DEVICE_ERROR The LAN9118 has been started but not initialized.
**/
EFI_STATUS
EFIAPI
SnpReceiveFilters (
IN EFI_SIMPLE_NETWORK_PROTOCOL *Snp,
IN UINT32 Enable,
IN UINT32 Disable,
IN BOOLEAN ResetMCastFilter,
IN UINTN MCastFilterCnt OPTIONAL,
IN EFI_MAC_ADDRESS *MCastFilter OPTIONAL
)
{
EFI_SIMPLE_NETWORK_MODE *Mode;
UINT32 MultHashTableHigh;
UINT32 MultHashTableLow;
UINT32 Count;
UINT32 Crc;
UINT8 HashValue;
UINT32 MacCSRValue;
UINT32 ReceiveFilterSetting;
EFI_MAC_ADDRESS *Mac;
EFI_MAC_ADDRESS ZeroMac;
// Check Snp Instance
if (Snp == NULL) {
return EFI_INVALID_PARAMETER;
}
Mode = Snp->Mode;
// Check that driver was started and initialised
if (Mode->State == EfiSimpleNetworkStarted) {
DEBUG ((EFI_D_WARN, "Warning: LAN9118 Driver not initialized\n"));
return EFI_DEVICE_ERROR;
} else if (Mode->State == EfiSimpleNetworkStopped) {
DEBUG ((EFI_D_WARN, "Warning: LAN9118 Driver in stopped state\n"));
return EFI_NOT_STARTED;
}
if ((Enable & (~Mode->ReceiveFilterMask)) ||
(Disable & (~Mode->ReceiveFilterMask)) ) {
return EFI_INVALID_PARAMETER;
}
//
// Check the validity of the multicast setting and compute the
// hash values of the multicast mac addresses to listen to.
//
MultHashTableHigh = 0;
MultHashTableLow = 0;
if ((!ResetMCastFilter) &&
((Disable & EFI_SIMPLE_NETWORK_RECEIVE_MULTICAST) == 0) &&
((Enable & EFI_SIMPLE_NETWORK_RECEIVE_MULTICAST) != 0) ) {
if ((MCastFilterCnt == 0) ||
(MCastFilterCnt > Mode->MaxMCastFilterCount) ||
(MCastFilter == NULL) ) {
return EFI_INVALID_PARAMETER;
}
//
// Check the validity of all multicast addresses before to change
// anything.
//
for (Count = 0; Count < MCastFilterCnt; Count++) {
if ((MCastFilter[Count].Addr[0] & 1) == 0) {
return EFI_INVALID_PARAMETER;
}
}
//
// Go through each filter address and set appropriate bits on hash table
//
for (Count = 0; Count < MCastFilterCnt; Count++) {
Mac = &(MCastFilter[Count]);
CopyMem (&Mode->MCastFilter[Count], Mac, sizeof(EFI_MAC_ADDRESS));
Crc = GenEtherCrc32 (Mac, NET_ETHER_ADDR_LEN);
//gBS->CalculateCrc32 ((VOID*)&Mfilter[Count],6,&Crc); <-- doesn't work as desired
//
// The most significant 6 bits of the MAC address CRC constitute the hash
// value of the MAC address.
//
HashValue = (Crc >> 26) & 0x3F;
// Select hashlow register if MSB is not set
if ((HashValue & 0x20) == 0) {
MultHashTableLow |= (1 << HashValue);
} else {
MultHashTableHigh |= (1 << (HashValue & 0x1F));
}
}
Mode->MCastFilterCount = MCastFilterCnt;
} else if (ResetMCastFilter) {
Mode->MCastFilterCount = 0;
} else {
MultHashTableLow = IndirectMACRead32 (INDIRECT_MAC_INDEX_HASHL);
MultHashTableHigh = IndirectMACRead32 (INDIRECT_MAC_INDEX_HASHH);
}
//
// Before to change anything, stop and reset the reception of
// packets.
//
StopRx (STOP_RX_CLEAR, Snp);
//
// Write the mask of the selected hash values for the multicast filtering.
// The two masks are set to zero if the multicast filtering is not enabled.
//
IndirectMACWrite32 (INDIRECT_MAC_INDEX_HASHL, MultHashTableLow);
IndirectMACWrite32 (INDIRECT_MAC_INDEX_HASHH, MultHashTableHigh);
ReceiveFilterSetting = (Mode->ReceiveFilterSetting | Enable) & (~Disable);
//
// Read MAC controller
//
MacCSRValue = IndirectMACRead32 (INDIRECT_MAC_INDEX_CR);
MacCSRValue &= ~(MACCR_HPFILT | MACCR_BCAST | MACCR_PRMS | MACCR_MCPAS);
if (ReceiveFilterSetting & EFI_SIMPLE_NETWORK_RECEIVE_UNICAST) {
Lan9118SetMacAddress (&Mode->CurrentAddress, Snp);
DEBUG ((DEBUG_NET, "Allowing Unicast Frame Reception\n"));
} else {
//
// The Unicast packets do not have to be listen to, set the MAC
// address of the LAN9118 to be the "not configured" all zeroes
// ethernet MAC address.
//
ZeroMem (&ZeroMac, NET_ETHER_ADDR_LEN);
Lan9118SetMacAddress (&ZeroMac, Snp);
}
if (ReceiveFilterSetting & EFI_SIMPLE_NETWORK_RECEIVE_MULTICAST) {
MacCSRValue |= MACCR_HPFILT;
DEBUG ((DEBUG_NET, "Allowing Multicast Frame Reception\n"));
}
if (ReceiveFilterSetting & EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS_MULTICAST) {
MacCSRValue |= MACCR_MCPAS;
DEBUG ((DEBUG_NET, "Enabling Promiscuous Multicast Mode\n"));
}
if ((ReceiveFilterSetting & EFI_SIMPLE_NETWORK_RECEIVE_BROADCAST) == 0) {
MacCSRValue |= MACCR_BCAST;
} else {
DEBUG ((DEBUG_NET, "Allowing Broadcast Frame Reception\n"));
}
if (ReceiveFilterSetting & EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS) {
MacCSRValue |= MACCR_PRMS;
DEBUG ((DEBUG_NET, "Enabling Promiscuous Mode\n"));
}
//
// Write the options to the MAC_CSR
//
IndirectMACWrite32 (INDIRECT_MAC_INDEX_CR, MacCSRValue);
gBS->Stall (LAN9118_STALL);
//
// If we have to retrieve something, start packet reception.
//
Mode->ReceiveFilterSetting = ReceiveFilterSetting;
if (ReceiveFilterSetting != 0) {
StartRx (0, Snp);
}
return EFI_SUCCESS;
}
/**
Modify of reset the current station address
@param[in] Snp A pointer to the EFI_SIMPLE_NETWORK_PROTOCOL
instance.
@param[in] Reset Flag used to reset the station address to the
LAN9118's permanent address.
@param[in] New New station address to be used for the network interface.
@retval EFI_SUCCESS The LAN9118's station address was updated.
@retval EFI_NOT_STARTED The LAN9118 has not been started.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE :
. The "New" station address is invalid.
. "Reset" is FALSE and "New" is NULL.
@retval EFI_DEVICE_ERROR The LAN9118 has been started but not initialized.
**/
EFI_STATUS
EFIAPI
SnpStationAddress (
IN EFI_SIMPLE_NETWORK_PROTOCOL *Snp,
IN BOOLEAN Reset,
IN EFI_MAC_ADDRESS *New
)
{
UINT32 Count;
UINT8 PermAddr[NET_ETHER_ADDR_LEN];
DEBUG ((DEBUG_NET, "SnpStationAddress()\n"));
// Check Snp instance
if (Snp == NULL) {
return EFI_INVALID_PARAMETER;
}
// Check that driver was started and initialised
if (Snp->Mode->State == EfiSimpleNetworkStarted) {
DEBUG ((EFI_D_WARN, "Warning: LAN9118 Driver not initialized\n"));
return EFI_DEVICE_ERROR;
} else if (Snp->Mode->State == EfiSimpleNetworkStopped) {
DEBUG ((EFI_D_WARN, "Warning: LAN9118 Driver in stopped state\n"));
return EFI_NOT_STARTED;
}
// Get the Permanent MAC address if need reset
if (Reset) {
// Try using EEPROM first. Read the first byte of data from EEPROM at the address 0x0
if ((IndirectEEPROMRead32 (0) & 0xFF) == EEPROM_EXTERNAL_SERIAL_EEPROM) {
for (Count = 0; Count < NET_ETHER_ADDR_LEN; Count++) {
PermAddr[Count] = IndirectEEPROMRead32 (Count + 1);
}
New = (EFI_MAC_ADDRESS *) PermAddr;
Lan9118SetMacAddress ((EFI_MAC_ADDRESS *) PermAddr, Snp);
} else {
DEBUG ((EFI_D_ERROR, "Lan9118: Warning: No valid MAC address in EEPROM, using fallback\n"));
New = (EFI_MAC_ADDRESS*) (FixedPcdGet64 (PcdLan9118DefaultMacAddress));
}
} else {
// Otherwise use the specified new MAC address
if (New == NULL) {
return EFI_INVALID_PARAMETER;
}
//
// If it is a multicast address, it is not valid.
//
if (New->Addr[0] & 0x01) {
return EFI_INVALID_PARAMETER;
}
}
CopyMem (&Snp->Mode->CurrentAddress, New, NET_ETHER_ADDR_LEN);
//
// If packet reception is currently activated, stop and reset it,
// set the new ethernet address and restart the packet reception.
// Otherwise, nothing to do, the MAC address will be updated in
// SnpReceiveFilters() when the UNICAST packet reception will be
// activated.
//
if (Snp->Mode->ReceiveFilterSetting != 0) {
StopRx (STOP_RX_CLEAR, Snp);
Lan9118SetMacAddress (New, Snp);
StartRx (0, Snp);
}
return EFI_SUCCESS;
}
/*
* UEFI Statistics() function
*
*/
EFI_STATUS
EFIAPI
SnpStatistics (
IN EFI_SIMPLE_NETWORK_PROTOCOL* Snp,
IN BOOLEAN Reset,
IN OUT UINTN *StatSize,
OUT EFI_NETWORK_STATISTICS *Statistics
)
{
LAN9118_DRIVER *LanDriver;
EFI_STATUS Status;
LanDriver = INSTANCE_FROM_SNP_THIS (Snp);
DEBUG ((DEBUG_NET, "SnpStatistics()\n"));
// Check Snp instance
if (Snp == NULL) {
return EFI_INVALID_PARAMETER;
}
// Check that driver was started and initialised
if (Snp->Mode->State == EfiSimpleNetworkStarted) {
DEBUG ((EFI_D_WARN, "Warning: LAN9118 Driver not initialized\n"));
return EFI_DEVICE_ERROR;
} else if (Snp->Mode->State == EfiSimpleNetworkStopped) {
DEBUG ((EFI_D_WARN, "Warning: LAN9118 Driver in stopped state\n"));
return EFI_NOT_STARTED;
}
//
// Do a reset if required. It is not clearly stated in the UEFI specification
// whether the reset has to be done before to copy the statistics in "Statictics"
// or after. It is a bit strange to do it before but that is what is expected by
// the SCT test on Statistics() with reset : "0x3de76704,0x4bf5,0x42cd,0x8c,0x89,
// 0x54,0x7e,0x4f,0xad,0x4f,0x24".
//
if (Reset) {
ZeroMem (&LanDriver->Stats, sizeof(EFI_NETWORK_STATISTICS));
}
Status = EFI_SUCCESS;
if (StatSize == NULL) {
if (Statistics != NULL) {
return EFI_INVALID_PARAMETER;
}
} else {
if (Statistics == NULL) {
Status = EFI_BUFFER_TOO_SMALL;
} else {
// Fill in the statistics
CopyMem (
Statistics, &LanDriver->Stats,
MIN (*StatSize, sizeof (EFI_NETWORK_STATISTICS))
);
if (*StatSize < sizeof (EFI_NETWORK_STATISTICS)) {
Status = EFI_BUFFER_TOO_SMALL;
}
}
*StatSize = sizeof (EFI_NETWORK_STATISTICS);
}
return Status;
}
/*
* UEFI MCastIPtoMAC() function
*
*/
EFI_STATUS
EFIAPI
SnpMcastIptoMac (
IN EFI_SIMPLE_NETWORK_PROTOCOL* Snp,
IN BOOLEAN IsIpv6,
IN EFI_IP_ADDRESS *Ip,
OUT EFI_MAC_ADDRESS *McastMac
)
{
DEBUG ((DEBUG_NET, "SnpMcastIptoMac()\n"));
// Check Snp instance
if (Snp == NULL) {
return EFI_INVALID_PARAMETER;
}
// Check that driver was started and initialised
if (Snp->Mode->State == EfiSimpleNetworkStarted) {
DEBUG ((EFI_D_WARN, "Warning: LAN9118 Driver not initialized\n"));
return EFI_DEVICE_ERROR;
} else if (Snp->Mode->State == EfiSimpleNetworkStopped) {
DEBUG ((EFI_D_WARN, "Warning: LAN9118 Driver in stopped state\n"));
return EFI_NOT_STARTED;
}
// Check parameters
if ((McastMac == NULL) || (Ip == NULL)) {
return EFI_INVALID_PARAMETER;
}
// Make sure MAC address is empty
ZeroMem (McastMac, sizeof(EFI_MAC_ADDRESS));
// If we need ipv4 address
if (!IsIpv6) {
// Most significant 25 bits of a multicast HW address are set.
// 01-00-5E is the IPv4 Ethernet Multicast Address (see RFC 1112)
McastMac->Addr[0] = 0x01;
McastMac->Addr[1] = 0x00;
McastMac->Addr[2] = 0x5E;
// Lower 23 bits from ipv4 address
McastMac->Addr[3] = (Ip->v4.Addr[1] & 0x7F); // Clear the most significant bit (25th bit of MAC must be 0)
McastMac->Addr[4] = Ip->v4.Addr[2];
McastMac->Addr[5] = Ip->v4.Addr[3];
} else {
// Most significant 16 bits of multicast v6 HW address are set
// 33-33 is the IPv6 Ethernet Multicast Address (see RFC 2464)
McastMac->Addr[0] = 0x33;
McastMac->Addr[1] = 0x33;
// lower four octets are taken from ipv6 address
McastMac->Addr[2] = Ip->v6.Addr[8];
McastMac->Addr[3] = Ip->v6.Addr[9];
McastMac->Addr[4] = Ip->v6.Addr[10];
McastMac->Addr[5] = Ip->v6.Addr[11];
}
return EFI_SUCCESS;
}
/*
* UEFI NvData() function
*
*/
EFI_STATUS
EFIAPI
SnpNvData (
IN EFI_SIMPLE_NETWORK_PROTOCOL* pobj,
IN BOOLEAN read_write,
IN UINTN offset,
IN UINTN buff_size,
IN OUT VOID *data
)
{
DEBUG ((DEBUG_NET, "SnpNvData()\n"));
return EFI_UNSUPPORTED;
}
/*
* UEFI GetStatus () function
*
*/
EFI_STATUS
EFIAPI
SnpGetStatus (
IN EFI_SIMPLE_NETWORK_PROTOCOL *Snp,
OUT UINT32 *IrqStat OPTIONAL,
OUT VOID **TxBuff OPTIONAL
)
{
UINT32 FifoInt;
EFI_STATUS Status;
UINTN NumTxStatusEntries;
UINT32 TxStatus;
UINT16 PacketTag;
UINT32 Interrupts;
LAN9118_DRIVER *LanDriver;
LanDriver = INSTANCE_FROM_SNP_THIS (Snp);
// Check preliminaries
if (Snp == NULL) {
return EFI_INVALID_PARAMETER;
}
// Check that driver was started and initialised
if (Snp->Mode->State == EfiSimpleNetworkStarted) {
DEBUG ((EFI_D_WARN, "Warning: LAN9118 Driver not initialized\n"));
return EFI_DEVICE_ERROR;
} else if (Snp->Mode->State == EfiSimpleNetworkStopped) {
DEBUG ((EFI_D_WARN, "Warning: LAN9118 Driver in stopped state\n"));
return EFI_NOT_STARTED;
}
// Check and acknowledge TX Status interrupt (this will happen if the
// consumer of SNP does not call GetStatus.)
// TODO will we lose TxStatuses if this happens? Maybe in SnpTransmit we
// should check for it and dump the TX Status FIFO.
FifoInt = MmioRead32 (LAN9118_FIFO_INT);
// Clear the TX Status FIFO Overflow
if ((FifoInt & INSTS_TXSO) == 0) {
FifoInt |= INSTS_TXSO;
MmioWrite32 (LAN9118_FIFO_INT, FifoInt);
}
// Read interrupt status if IrqStat is not NULL
if (IrqStat != NULL) {
*IrqStat = 0;
// Check for receive interrupt
if (MmioRead32 (LAN9118_INT_STS) & INSTS_RSFL) { // Data moved from rx FIFO
*IrqStat |= EFI_SIMPLE_NETWORK_RECEIVE_INTERRUPT;
MmioWrite32 (LAN9118_INT_STS,INSTS_RSFL);
}
// Check for transmit interrupt
if (MmioRead32 (LAN9118_INT_STS) & INSTS_TSFL) {
*IrqStat |= EFI_SIMPLE_NETWORK_TRANSMIT_INTERRUPT;
MmioWrite32 (LAN9118_INT_STS,INSTS_TSFL);
}
// Check for software interrupt
if (MmioRead32 (LAN9118_INT_STS) & INSTS_SW_INT) {
*IrqStat |= EFI_SIMPLE_NETWORK_SOFTWARE_INTERRUPT;
MmioWrite32 (LAN9118_INT_STS,INSTS_SW_INT);
}
}
// Check Status of transmitted packets
// (We ignore TXSTATUS_NO_CA has it might happen in Full Duplex)
NumTxStatusEntries = MmioRead32(LAN9118_TX_FIFO_INF) & TXFIFOINF_TXSUSED_MASK;
if (NumTxStatusEntries > 0) {
TxStatus = MmioRead32 (LAN9118_TX_STATUS);
PacketTag = TxStatus >> 16;
TxStatus = TxStatus & 0xFFFF;
if ((TxStatus & TXSTATUS_ES) && (TxStatus != (TXSTATUS_ES | TXSTATUS_NO_CA))) {
DEBUG ((EFI_D_ERROR, "LAN9118: There was an error transmitting. TxStatus=0x%08x:", TxStatus));
if (TxStatus & TXSTATUS_NO_CA) {
DEBUG ((EFI_D_ERROR, "- No carrier\n"));
}
if (TxStatus & TXSTATUS_DEF) {
DEBUG ((EFI_D_ERROR, "- Packet tx was deferred\n"));
}
if (TxStatus & TXSTATUS_EDEF) {
DEBUG ((EFI_D_ERROR, "- Tx ended because of excessive deferral\n"));
}
if (TxStatus & TXSTATUS_ECOLL) {
DEBUG ((EFI_D_ERROR, "- Tx ended because of Excessive Collisions\n"));
}
if (TxStatus & TXSTATUS_LCOLL) {
DEBUG ((EFI_D_ERROR, "- Packet Tx aborted after coll window of 64 bytes\n"));
}
if (TxStatus & TXSTATUS_LOST_CA) {
DEBUG ((EFI_D_ERROR, "- Lost carrier during Tx\n"));
}
return EFI_DEVICE_ERROR;
} else if (TxBuff != NULL) {
LanDriver->Stats.TxTotalFrames += 1;
*TxBuff = LanDriver->TxRing[PacketTag % LAN9118_TX_RING_NUM_ENTRIES];
}
}
// Check for a TX Error interrupt
Interrupts = MmioRead32 (LAN9118_INT_STS);
if (Interrupts & INSTS_TXE) {
DEBUG ((EFI_D_ERROR, "LAN9118: Transmitter error. Restarting..."));
// Initiate a software reset
Status = SoftReset (0, Snp);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "\n\tSoft Reset Failed: Hardware Error\n"));
return EFI_DEVICE_ERROR;
}
// Acknowledge the TXE
MmioWrite32 (LAN9118_INT_STS, INSTS_TXE);
gBS->Stall (LAN9118_STALL);
// Restart the transmitter
StartTx (START_TX_MAC | START_TX_CFG, Snp);
}
// Update the media status
Status = CheckLinkStatus (0, Snp);
if (EFI_ERROR(Status)) {
Snp->Mode->MediaPresent = FALSE;
} else {
Snp->Mode->MediaPresent = TRUE;
}
return EFI_SUCCESS;
}
/*
* UEFI Transmit() function
*
*/
EFI_STATUS
EFIAPI
SnpTransmit (
IN EFI_SIMPLE_NETWORK_PROTOCOL *Snp,
IN UINTN HdrSize,
IN UINTN BuffSize,
IN VOID* Data,
IN EFI_MAC_ADDRESS *SrcAddr OPTIONAL,
IN EFI_MAC_ADDRESS *DstAddr OPTIONAL,
IN UINT16 *Protocol OPTIONAL
)
{
LAN9118_DRIVER *LanDriver;
UINT32 TxFreeSpace;
UINT32 TxStatusSpace;
INT32 Count;
UINT32 CommandA;
UINT32 CommandB;
UINT16 LocalProtocol;
UINT32 *LocalData;
UINT16 PacketTag;
#if defined(EVAL_PERFORMANCE)
UINT64 Perf;
UINT64 StartClock;
UINT64 EndClock;
Perf = GetPerformanceCounterProperties (NULL, NULL);
StartClock = GetPerformanceCounter ();
#endif
LanDriver = INSTANCE_FROM_SNP_THIS (Snp);
// Check preliminaries
if ((Snp == NULL) || (Data == NULL)) {
return EFI_INVALID_PARAMETER;
}
// Check that driver was started and initialised
if (Snp->Mode->State == EfiSimpleNetworkStarted) {
DEBUG ((EFI_D_WARN, "Warning: LAN9118 Driver not initialized\n"));
return EFI_DEVICE_ERROR;
} else if (Snp->Mode->State == EfiSimpleNetworkStopped) {
DEBUG ((EFI_D_WARN, "Warning: LAN9118 Driver in stopped state\n"));
return EFI_NOT_STARTED;
}
// Ensure header is correct size if non-zero
if (HdrSize) {
if (HdrSize != Snp->Mode->MediaHeaderSize) {
return EFI_INVALID_PARAMETER;
}
if ((DstAddr == NULL) || (Protocol == NULL)) {
return EFI_INVALID_PARAMETER;
}
}
//
// Check validity of BufferSize
//
if (BuffSize < Snp->Mode->MediaHeaderSize) {
return EFI_BUFFER_TOO_SMALL;
}
// Before transmitting check the link status
/*if (CheckLinkStatus (0, Snp) < 0) {
return EFI_NOT_READY;
}*/
// Get DATA FIFO free space in bytes
TxFreeSpace = TxDataFreeSpace (0, Snp);
if (TxFreeSpace < BuffSize) {
return EFI_NOT_READY;
}
// Get STATUS FIFO used space in bytes
TxStatusSpace = TxStatusUsedSpace (0, Snp);
if (TxStatusSpace > 500) {
return EFI_NOT_READY;
}
// If DstAddr is not provided, get it from Buffer (we trust that the caller
// has provided a well-formed frame).
if (DstAddr == NULL) {
DstAddr = (EFI_MAC_ADDRESS *) Data;
}
// Check for the nature of the frame
if ((DstAddr->Addr[0] & 0x1) == 1) {
LanDriver->Stats.TxMulticastFrames += 1;
} else {
LanDriver->Stats.TxUnicastFrames += 1;
}
// Check if broadcast
if (DstAddr->Addr[0] == 0xFF) {
LanDriver->Stats.TxBroadcastFrames += 1;
}
PacketTag = LanDriver->NextPacketTag;
LanDriver->NextPacketTag++;
if (HdrSize) {
// Format pointer
LocalData = (UINT32*) Data;
LocalProtocol = *Protocol;
// Create first buffer to pass to controller (for the header)
CommandA = TX_CMD_A_FIRST_SEGMENT | TX_CMD_A_BUFF_SIZE (HdrSize);
CommandB = TX_CMD_B_PACKET_TAG (PacketTag) | TX_CMD_B_PACKET_LENGTH (BuffSize);
// Write the commands first
MmioWrite32 (LAN9118_TX_DATA, CommandA);
MmioWrite32 (LAN9118_TX_DATA, CommandB);
// Write the destination address
MmioWrite32 (LAN9118_TX_DATA,
(DstAddr->Addr[0]) |
(DstAddr->Addr[1] << 8) |
(DstAddr->Addr[2] << 16) |
(DstAddr->Addr[3] << 24)
);
MmioWrite32 (LAN9118_TX_DATA,
(DstAddr->Addr[4]) |
(DstAddr->Addr[5] << 8) |
(SrcAddr->Addr[0] << 16) | // Write the Source Address
(SrcAddr->Addr[1] << 24)
);
MmioWrite32 (LAN9118_TX_DATA,
(SrcAddr->Addr[2]) |
(SrcAddr->Addr[3] << 8) |
(SrcAddr->Addr[4] << 16) |
(SrcAddr->Addr[5] << 24)
);
// Write the Protocol
MmioWrite32 (LAN9118_TX_DATA, (UINT32)(HTONS (LocalProtocol)));
// Next buffer is the payload
CommandA = TX_CMD_A_LAST_SEGMENT | TX_CMD_A_BUFF_SIZE (BuffSize - HdrSize) | TX_CMD_A_COMPLETION_INT | TX_CMD_A_DATA_START_OFFSET (2); // 2 bytes beginning offset
// Write the commands
MmioWrite32 (LAN9118_TX_DATA, CommandA);
MmioWrite32 (LAN9118_TX_DATA, CommandB);
// Write the payload
for (Count = 0; Count < ((BuffSize + 3) >> 2) - 3; Count++) {
MmioWrite32 (LAN9118_TX_DATA, LocalData[Count + 3]);
}
} else {
// Format pointer
LocalData = (UINT32*) Data;
// Create a buffer to pass to controller
CommandA = TX_CMD_A_FIRST_SEGMENT | TX_CMD_A_LAST_SEGMENT | TX_CMD_A_BUFF_SIZE (BuffSize) | TX_CMD_A_COMPLETION_INT;
CommandB = TX_CMD_B_PACKET_TAG (PacketTag) | TX_CMD_B_PACKET_LENGTH (BuffSize);
// Write the commands first
MmioWrite32 (LAN9118_TX_DATA, CommandA);
MmioWrite32 (LAN9118_TX_DATA, CommandB);
// Write all the data
for (Count = 0; Count < ((BuffSize + 3) >> 2); Count++) {
MmioWrite32 (LAN9118_TX_DATA, LocalData[Count]);
}
}
// Save the address of the submitted packet so we can notify the consumer that
// it has been sent in GetStatus. When the packet tag appears in the Tx Status
// Fifo, we will return Buffer in the TxBuff parameter of GetStatus.
LanDriver->TxRing[PacketTag % LAN9118_TX_RING_NUM_ENTRIES] = Data;
#if defined(EVAL_PERFORMANCE)
EndClock = GetPerformanceCounter ();
DEBUG ((EFI_D_ERROR, "Time processing: %d counts @ %d Hz\n", StartClock - EndClock,Perf));
#endif
LanDriver->Stats.TxGoodFrames += 1;
return EFI_SUCCESS;
}
/*
* UEFI Receive() function
*
*/
EFI_STATUS
EFIAPI
SnpReceive (
IN EFI_SIMPLE_NETWORK_PROTOCOL* Snp,
OUT UINTN *HdrSize OPTIONAL,
IN OUT UINTN *BuffSize,
OUT VOID *Data,
OUT EFI_MAC_ADDRESS *SrcAddr OPTIONAL,
OUT EFI_MAC_ADDRESS *DstAddr OPTIONAL,
OUT UINT16 *Protocol OPTIONAL
)
{
LAN9118_DRIVER *LanDriver;
UINT32 RxFifoStatus;
UINT32 NumPackets;
UINT32 RxCfgValue;
UINT32 PLength; // Packet length
UINT32 ReadLimit;
UINT32 Count;
UINT32 Padding;
UINT32 *RawData;
EFI_MAC_ADDRESS Dst;
EFI_MAC_ADDRESS Src;
UINTN DroppedFrames;
EFI_STATUS Status;
LanDriver = INSTANCE_FROM_SNP_THIS (Snp);
#if defined(EVAL_PERFORMANCE)
UINT64 Perf = GetPerformanceCounterProperties (NULL, NULL);
UINT64 StartClock = GetPerformanceCounter ();
#endif
// Check preliminaries
if ((Snp == NULL) || (Data == NULL) || (BuffSize == NULL)) {
return EFI_INVALID_PARAMETER;
}
// Check that driver was started and initialised
if (Snp->Mode->State == EfiSimpleNetworkStarted) {
DEBUG ((EFI_D_WARN, "Warning: LAN9118 Driver not initialized\n"));
return EFI_DEVICE_ERROR;
} else if (Snp->Mode->State == EfiSimpleNetworkStopped) {
DEBUG ((EFI_D_WARN, "Warning: LAN9118 Driver in stopped state\n"));
return EFI_NOT_STARTED;
}
// Count dropped frames
DroppedFrames = MmioRead32 (LAN9118_RX_DROP);
LanDriver->Stats.RxDroppedFrames += DroppedFrames;
NumPackets = RxStatusUsedSpace (0, Snp) / 4;
if (!NumPackets) {
return EFI_NOT_READY;
}
// Read Rx Status (only if not empty)
RxFifoStatus = MmioRead32 (LAN9118_RX_STATUS);
LanDriver->Stats.RxTotalFrames += 1;
// First check for errors
if ((RxFifoStatus & RXSTATUS_MII_ERROR) ||
(RxFifoStatus & RXSTATUS_RXW_TO) ||
(RxFifoStatus & RXSTATUS_FTL) ||
(RxFifoStatus & RXSTATUS_LCOLL) ||
(RxFifoStatus & RXSTATUS_LE) ||
(RxFifoStatus & RXSTATUS_DB))
{
DEBUG ((EFI_D_WARN, "Warning: There was an error on frame reception.\n"));
return EFI_DEVICE_ERROR;
}
// Check if we got a CRC error
if (RxFifoStatus & RXSTATUS_CRC_ERROR) {
DEBUG ((EFI_D_WARN, "Warning: Crc Error\n"));
LanDriver->Stats.RxCrcErrorFrames += 1;
LanDriver->Stats.RxDroppedFrames += 1;
return EFI_DEVICE_ERROR;
}
// Check if we got a runt frame
if (RxFifoStatus & RXSTATUS_RUNT) {
DEBUG ((EFI_D_WARN, "Warning: Runt Frame\n"));
LanDriver->Stats.RxUndersizeFrames += 1;
LanDriver->Stats.RxDroppedFrames += 1;
return EFI_DEVICE_ERROR;
}
// Check filtering status for this packet
if (RxFifoStatus & RXSTATUS_FILT_FAIL) {
DEBUG ((EFI_D_WARN, "Warning: Frame Failed Filtering\n"));
// fast forward?
}
// Check if we got a broadcast frame
if (RxFifoStatus & RXSTATUS_BCF) {
LanDriver->Stats.RxBroadcastFrames += 1;
}
// Check if we got a multicast frame
if (RxFifoStatus & RXSTATUS_MCF) {
LanDriver->Stats.RxMulticastFrames += 1;
}
// Check if we got a unicast frame
if ((RxFifoStatus & RXSTATUS_BCF) && ((RxFifoStatus & RXSTATUS_MCF) == 0)) {
LanDriver->Stats.RxUnicastFrames += 1;
}
// Get the received packet length
PLength = GET_RXSTATUS_PACKET_LENGTH(RxFifoStatus);
LanDriver->Stats.RxTotalBytes += (PLength - 4);
// Check buffer size
if (*BuffSize < PLength) {
*BuffSize = PLength;
return EFI_BUFFER_TOO_SMALL;
}
// If padding is applied, read more DWORDs
if (PLength % 4) {
Padding = 4 - (PLength % 4);
ReadLimit = (PLength + Padding)/4;
} else {
ReadLimit = PLength/4;
Padding = 0;
}
// Set the amount of data to be transfered out of FIFO for THIS packet
// This can be used to trigger an interrupt, and status can be checked
RxCfgValue = MmioRead32 (LAN9118_RX_CFG);
RxCfgValue &= ~(RXCFG_RX_DMA_CNT_MASK);
RxCfgValue |= RXCFG_RX_DMA_CNT (ReadLimit);
// Set end alignment to 4-bytes
RxCfgValue &= ~(RXCFG_RX_END_ALIGN_MASK);
MmioWrite32 (LAN9118_RX_CFG, RxCfgValue);
// Update buffer size
*BuffSize = PLength; // -4 bytes may be needed: Received in buffer as
// 4 bytes longer than packet actually is, unless
// packet is < 64 bytes
if (HdrSize != NULL)
*HdrSize = Snp->Mode->MediaHeaderSize;
// Format the pointer
RawData = (UINT32*)Data;
// Read Rx Packet
for (Count = 0; Count < ReadLimit; Count++) {
RawData[Count] = MmioRead32 (LAN9118_RX_DATA);
}
// Check for Rx errors (worst possible error)
if (MmioRead32 (LAN9118_INT_STS) & INSTS_RXE) {
DEBUG ((EFI_D_WARN, "Warning: Receiver Error. Restarting...\n"));
// Initiate a software reset
Status = SoftReset (0, Snp);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Error: Soft Reset Failed: Hardware Error.\n"));
return EFI_DEVICE_ERROR;
}
// Acknowledge the RXE
MmioWrite32 (LAN9118_INT_STS, INSTS_RXE);
gBS->Stall (LAN9118_STALL);
// Restart the rx (and do not clear FIFO)
StartRx (0, Snp);
// Say that command could not be sent
return EFI_DEVICE_ERROR;
}
// Get the destination address
if (DstAddr != NULL) {
Dst.Addr[0] = (RawData[0] & 0xFF);
Dst.Addr[1] = (RawData[0] & 0xFF00) >> 8;
Dst.Addr[2] = (RawData[0] & 0xFF0000) >> 16;
Dst.Addr[3] = (RawData[0] & 0xFF000000) >> 24;
Dst.Addr[4] = (RawData[1] & 0xFF);
Dst.Addr[5] = (RawData[1] & 0xFF00) >> 8;
CopyMem (DstAddr, &Dst, NET_ETHER_ADDR_LEN);
}
// Get the source address
if (SrcAddr != NULL) {
Src.Addr[0] = (RawData[1] & 0xFF0000) >> 16;
Src.Addr[1] = (RawData[1] & 0xFF000000) >> 24;
Src.Addr[2] = (RawData[2] & 0xFF);
Src.Addr[3] = (RawData[2] & 0xFF00) >> 8;
Src.Addr[4] = (RawData[2] & 0xFF0000) >> 16;
Src.Addr[5] = (RawData[2] & 0xFF000000) >> 24;
CopyMem (SrcAddr,&Src, NET_ETHER_ADDR_LEN);
}
// Get the protocol
if (Protocol != NULL) {
*Protocol = NTOHS (RawData[3] & 0xFFFF);
}
#if defined(EVAL_PERFORMANCE)
UINT64 EndClock = GetPerformanceCounter ();
DEBUG ((EFI_D_ERROR, "Receive Time processing: %d counts @ %d Hz\n", StartClock - EndClock,Perf));
#endif
LanDriver->Stats.RxGoodFrames += 1;
return EFI_SUCCESS;
}
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