[mirror_edk2.git] / EmbeddedPkg / Drivers / Lan9118Dxe / Lan9118Dxe.c

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