initialize.c

来自「EFI BIOS是Intel提出的下一代的BIOS标准。这里上传的Edk源代码是」· C语言 代码 · 共 244 行

/*++
Copyright (c) 2004 - 2005, Intel Corporation                                                         
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.             

Module name:
  initialize.c

Abstract:

Revision history:
  2000-Feb-09 M(f)J   Genesis.
--*/

#include "snp.h"

VOID
EFIAPI
SnpWaitForPacketNotify (
  IN EFI_EVENT  Event,
  IN VOID       *SnpPtr
  );

EFI_STATUS
pxe_init (
  SNP_DRIVER *snp,
  UINT16     CableDetectFlag
  )
/*++

Routine Description:
 this routine calls undi to initialize the interface.

Arguments:
 snp  - pointer to snp driver structure
 CableDetectFlag - Do/don't detect the cable (depending on what undi supports)

Returns:

--*/
{
  PXE_CPB_INITIALIZE  *cpb;
  VOID                *addr;
  EFI_STATUS          Status;

  cpb = snp->cpb;
  if (snp->tx_rx_bufsize != 0) {
    Status = snp->IoFncs->AllocateBuffer (
                            snp->IoFncs,
                            AllocateAnyPages,
                            EfiBootServicesData,
                            SNP_MEM_PAGES (snp->tx_rx_bufsize),
                            &addr,
                            0
                            );

    if (Status != EFI_SUCCESS) {
      DEBUG (
        (EFI_D_ERROR,
        "\nsnp->pxe_init()  AllocateBuffer  %xh (%r)\n",
        Status,
        Status)
        );

      return Status;
    }

    ASSERT (addr);

    snp->tx_rx_buffer = addr;
  }

  cpb->MemoryAddr   = (UINT64)(UINTN) snp->tx_rx_buffer;

  cpb->MemoryLength = snp->tx_rx_bufsize;

  //
  // let UNDI decide/detect these values
  //
  cpb->LinkSpeed      = 0;
  cpb->TxBufCnt       = 0;
  cpb->TxBufSize      = 0;
  cpb->RxBufCnt       = 0;
  cpb->RxBufSize      = 0;

  cpb->Duplex         = PXE_DUPLEX_DEFAULT;

  cpb->LoopBack       = LOOPBACK_NORMAL;

  snp->cdb.OpCode     = PXE_OPCODE_INITIALIZE;
  snp->cdb.OpFlags    = CableDetectFlag;

  snp->cdb.CPBsize    = sizeof (PXE_CPB_INITIALIZE);
  snp->cdb.DBsize     = sizeof (PXE_DB_INITIALIZE);

  snp->cdb.CPBaddr    = (UINT64)(UINTN) snp->cpb;
  snp->cdb.DBaddr     = (UINT64)(UINTN) snp->db;

  snp->cdb.StatCode   = PXE_STATCODE_INITIALIZE;
  snp->cdb.StatFlags  = PXE_STATFLAGS_INITIALIZE;
  snp->cdb.IFnum      = snp->if_num;
  snp->cdb.Control    = PXE_CONTROL_LAST_CDB_IN_LIST;

  DEBUG ((EFI_D_NET, "\nsnp->undi.initialize()  "));

  (*snp->issue_undi32_command) ((UINT64)(UINTN) &snp->cdb);

  if (snp->cdb.StatCode == PXE_STATCODE_SUCCESS) {
    snp->mode.State = EfiSimpleNetworkInitialized;

    Status          = EFI_SUCCESS;
  } else {
    DEBUG (
      (EFI_D_WARN,
      "\nsnp->undi.initialize()  %xh:%xh\n",
      snp->cdb.StatFlags,
      snp->cdb.StatCode)
      );

    if (snp->tx_rx_buffer != NULL) {
      snp->IoFncs->FreeBuffer (
                    snp->IoFncs,
                    SNP_MEM_PAGES (snp->tx_rx_bufsize),
                    (VOID *) snp->tx_rx_buffer
                    );
    }

    snp->tx_rx_buffer = NULL;

    Status            = EFI_DEVICE_ERROR;
  }

  return Status;
}

EFI_STATUS
EFIAPI
snp_undi32_initialize (
  IN EFI_SIMPLE_NETWORK_PROTOCOL *this,
  IN UINTN                       extra_rx_buffer_size OPTIONAL,
  IN UINTN                       extra_tx_buffer_size OPTIONAL
  )
/*++

Routine Description:
 This is the SNP interface routine for initializing the interface
 This routine basically retrieves snp structure, checks the SNP state and
 calls the pxe_initialize routine to actually do the undi initialization

Arguments:
 this  - context pointer
 extra_rx_buffer_size - optional parameter, indicates extra space for rx_buffers
 extra_tx_buffer_size - optional parameter, indicates extra space for tx_buffers

Returns:

--*/
{
  EFI_STATUS  EfiStatus;
  SNP_DRIVER  *snp;

  //
  //
  //
  if (this == NULL) {
    return EFI_INVALID_PARAMETER;
  }

  snp = EFI_SIMPLE_NETWORK_DEV_FROM_THIS (this);

  if (snp == NULL) {
    return EFI_INVALID_PARAMETER;
  }
  //
  //
  //
  switch (snp->mode.State) {
  case EfiSimpleNetworkStarted:
    break;

  case EfiSimpleNetworkStopped:
    return EFI_NOT_STARTED;

  case EfiSimpleNetworkInitialized:
    return EFI_DEVICE_ERROR;

  default:
    return EFI_DEVICE_ERROR;
  }
  //
  //
  //
  EfiStatus = gBS->CreateEvent (
                    EFI_EVENT_NOTIFY_WAIT,
                    EFI_TPL_NOTIFY,
                    &SnpWaitForPacketNotify,
                    snp,
                    &snp->snp.WaitForPacket
                    );

  if (EFI_ERROR (EfiStatus)) {
    snp->snp.WaitForPacket = NULL;
    return EFI_DEVICE_ERROR;
  }
  //
  //
  //
  snp->mode.MCastFilterCount      = 0;
  snp->mode.ReceiveFilterSetting  = 0;
  EfiZeroMem (snp->mode.MCastFilter, sizeof snp->mode.MCastFilter);
  EfiCopyMem (
    &snp->mode.CurrentAddress,
    &snp->mode.PermanentAddress,
    sizeof (EFI_MAC_ADDRESS)
    );

  //
  // Compute tx/rx buffer sizes based on UNDI init info and parameters.
  //
  snp->tx_rx_bufsize = (UINT32) (snp->init_info.MemoryRequired + extra_rx_buffer_size + extra_tx_buffer_size);

  if (snp->mode.MediaPresentSupported) {
    if (pxe_init (snp, PXE_OPFLAGS_INITIALIZE_DETECT_CABLE) == EFI_SUCCESS) {
      snp->mode.MediaPresent = TRUE;
      return EFI_SUCCESS;
    }
  }

  snp->mode.MediaPresent  = FALSE;

  EfiStatus               = pxe_init (snp, PXE_OPFLAGS_INITIALIZE_DO_NOT_DETECT_CABLE);

  if (EFI_ERROR (EfiStatus)) {
    gBS->CloseEvent (snp->snp.WaitForPacket);
  }

  return EfiStatus;
}