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android / device / linaro / bootloader / edk2 / refs/heads/oreo-mr1-iot-release / . / EmbeddedPkg / Drivers / Lan9118Dxe / Lan9118Dxe.c
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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 = Lan9118MmioRead32 (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
Lan9118MmioWrite32 (LAN9118_PMT_CTRL, PmConf);
// 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 Negotiation failed.\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
Lan9118MmioWrite32 (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 = Lan9118MmioRead32 (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
Lan9118MmioWrite32 (LAN9118_PMT_CTRL, PmConf);
// Reactivate the LEDs
Status = ConfigureHardware (HW_CONF_USE_LEDS, Snp);
if (EFI_ERROR (Status)) {
return Status;
}
// Check that a buffer size was specified in SnpInitialize
if (gTxBuffer != 0) {
HwConf = Lan9118MmioRead32 (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
Lan9118MmioWrite32 (LAN9118_HW_CFG, HwConf); // Write the conf
}
// 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
Lan9118MmioWrite32 (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);
//
// 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 = Lan9118MmioRead32 (LAN9118_FIFO_INT);
// Clear the TX Status FIFO Overflow
if ((FifoInt & INSTS_TXSO) == 0) {
FifoInt |= INSTS_TXSO;
Lan9118MmioWrite32 (LAN9118_FIFO_INT, FifoInt);
}
// Read interrupt status if IrqStat is not NULL
if (IrqStat != NULL) {
*IrqStat = 0;
// Check for receive interrupt
if (Lan9118MmioRead32 (LAN9118_INT_STS) & INSTS_RSFL) { // Data moved from rx FIFO
*IrqStat |= EFI_SIMPLE_NETWORK_RECEIVE_INTERRUPT;
Lan9118MmioWrite32 (LAN9118_INT_STS,INSTS_RSFL);
}
// Check for transmit interrupt
if (Lan9118MmioRead32 (LAN9118_INT_STS) & INSTS_TSFL) {
*IrqStat |= EFI_SIMPLE_NETWORK_TRANSMIT_INTERRUPT;
Lan9118MmioWrite32 (LAN9118_INT_STS,INSTS_TSFL);
}
// Check for software interrupt
if (Lan9118MmioRead32 (LAN9118_INT_STS) & INSTS_SW_INT) {
*IrqStat |= EFI_SIMPLE_NETWORK_SOFTWARE_INTERRUPT;
Lan9118MmioWrite32 (LAN9118_INT_STS,INSTS_SW_INT);
}
}
// Check Status of transmitted packets
// (We ignore TXSTATUS_NO_CA has it might happen in Full Duplex)
NumTxStatusEntries = Lan9118MmioRead32(LAN9118_TX_FIFO_INF) & TXFIFOINF_TXSUSED_MASK;
if (NumTxStatusEntries > 0) {
TxStatus = Lan9118MmioRead32 (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];
}
} else if (TxBuff != NULL) {
*TxBuff = NULL;
}
// Check for a TX Error interrupt
Interrupts = Lan9118MmioRead32 (LAN9118_INT_STS);
if (Interrupts & INSTS_TXE) {
DEBUG ((EFI_D_ERROR, "LAN9118: Transmitter error. Restarting..."));
// Software reset, the TXE interrupt is cleared by the reset.
Status = SoftReset (0, Snp);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "\n\tSoft Reset Failed: Hardware Error\n"));
return EFI_DEVICE_ERROR;
}
// Reactivate the LEDs
Status = ConfigureHardware (HW_CONF_USE_LEDS, Snp);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Restart the transmitter and if necessary the receiver.
// Do not ask for FIFO reset as it has already been done
// by SoftReset().
//
StartTx (START_TX_MAC | START_TX_CFG, Snp);
if (Snp->Mode->ReceiveFilterSetting != 0) {
StartRx (0, 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
Lan9118MmioWrite32 (LAN9118_TX_DATA, CommandA);
Lan9118MmioWrite32 (LAN9118_TX_DATA, CommandB);
// Write the destination address
Lan9118MmioWrite32 (LAN9118_TX_DATA,
(DstAddr->Addr[0]) |
(DstAddr->Addr[1] << 8) |
(DstAddr->Addr[2] << 16) |
(DstAddr->Addr[3] << 24)
);
Lan9118MmioWrite32 (LAN9118_TX_DATA,
(DstAddr->Addr[4]) |
(DstAddr->Addr[5] << 8) |
(SrcAddr->Addr[0] << 16) | // Write the Source Address
(SrcAddr->Addr[1] << 24)
);
Lan9118MmioWrite32 (LAN9118_TX_DATA,
(SrcAddr->Addr[2]) |
(SrcAddr->Addr[3] << 8) |
(SrcAddr->Addr[4] << 16) |
(SrcAddr->Addr[5] << 24)
);
// Write the Protocol
Lan9118MmioWrite32 (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
Lan9118MmioWrite32 (LAN9118_TX_DATA, CommandA);
Lan9118MmioWrite32 (LAN9118_TX_DATA, CommandB);
// Write the payload
for (Count = 0; Count < ((BuffSize + 3) >> 2) - 3; Count++) {
Lan9118MmioWrite32 (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
Lan9118MmioWrite32 (LAN9118_TX_DATA, CommandA);
Lan9118MmioWrite32 (LAN9118_TX_DATA, CommandB);
// Write all the data
for (Count = 0; Count < ((BuffSize + 3) >> 2); Count++) {
Lan9118MmioWrite32 (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 IntSts;
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;
}
//
// If the receiver raised the RXE error bit, check if the receiver status
// FIFO is full and if not just acknowledge the error. The two other
// conditions to get a RXE error are :
// . the RX data FIFO is read whereas being empty.
// . the RX status FIFO is read whereas being empty.
// The RX data and status FIFO are read by this driver only in the following
// code of this function. After the readings, the RXE error bit is checked
// and if raised, the controller is reset. Thus, at this point, we consider
// that the only valid reason to get an RXE error is the receiver status
// FIFO being full. And if this is not the case, we consider that this is
// a spurious error and we just get rid of it. We experienced such 'spurious'
// errors when running the driver on an A57 on Juno. No valid reason to
// explain those errors has been found so far and everything seems to
// work perfectly when they are just ignored.
//
IntSts = Lan9118MmioRead32 (LAN9118_INT_STS);
if ((IntSts & INSTS_RXE) && (!(IntSts & INSTS_RSFF))) {
Lan9118MmioWrite32 (LAN9118_INT_STS, INSTS_RXE);
}
// Count dropped frames
DroppedFrames = Lan9118MmioRead32 (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 = Lan9118MmioRead32 (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);
// If padding is applied, read more DWORDs
if (PLength % 4) {
Padding = 4 - (PLength % 4);
ReadLimit = (PLength + Padding)/4;
} else {
ReadLimit = PLength/4;
Padding = 0;
}
// Check buffer size
if (*BuffSize < (PLength + Padding)) {
*BuffSize = PLength + Padding;
return EFI_BUFFER_TOO_SMALL;
}
// 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 = Lan9118MmioRead32 (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);
Lan9118MmioWrite32 (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] = Lan9118MmioRead32 (LAN9118_RX_DATA);
}
// 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);
}
// Check for Rx errors (worst possible error)
if (Lan9118MmioRead32 (LAN9118_INT_STS) & INSTS_RXE) {
DEBUG ((EFI_D_WARN, "Warning: Receiver Error. Restarting...\n"));
// Software reset, the RXE interrupt is cleared by the reset.
Status = SoftReset (0, Snp);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Error: Soft Reset Failed: Hardware Error.\n"));
return EFI_DEVICE_ERROR;
}
// Reactivate the LEDs
Status = ConfigureHardware (HW_CONF_USE_LEDS, Snp);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Restart the receiver and the transmitter without resetting the FIFOs
// as it has been done by SoftReset().
//
StartRx (0, Snp);
StartTx (START_TX_MAC | START_TX_CFG, Snp);
// Say that command could not be sent
return EFI_DEVICE_ERROR;
}
#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;
}