audk/EdkModulePkg/Universal/Network/Snp32_64/Dxe/get_status.c

/*++
Copyright (c) 2006, 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:
  get_status.c

Abstract:

Revision history:
  2000-Feb-03 M(f)J   Genesis.
--*/


#include "Snp.h"

EFI_STATUS
pxe_getstatus (
  SNP_DRIVER *snp,
  UINT32     *InterruptStatusPtr,
  VOID       **TransmitBufferListPtr
  )
/*++

Routine Description:
 this routine calls undi to get the status of the interrupts, get the list of
 transmit buffers that completed transmitting! 

Arguments:
 snp  - pointer to snp driver structure
 InterruptStatusPtr - a non null pointer gets the interrupt status
 TransmitBufferListPtrs - a non null ointer gets the list of pointers of previously 
              transmitted buffers whose transmission was completed 
              asynchrnously.
              
Returns:

--*/
{
  PXE_DB_GET_STATUS *db;
  UINT16            InterruptFlags;
  UINT64            TempData;

  db                = snp->db;
  snp->cdb.OpCode   = PXE_OPCODE_GET_STATUS;

  snp->cdb.OpFlags  = 0;

  if (TransmitBufferListPtr != NULL) {
    snp->cdb.OpFlags |= PXE_OPFLAGS_GET_TRANSMITTED_BUFFERS;
  }

  if (InterruptStatusPtr != NULL) {
    snp->cdb.OpFlags |= PXE_OPFLAGS_GET_INTERRUPT_STATUS;
  }

  snp->cdb.CPBsize  = PXE_CPBSIZE_NOT_USED;
  snp->cdb.CPBaddr  = PXE_CPBADDR_NOT_USED;

  //
  // size DB for return of one buffer
  //
  snp->cdb.DBsize = (UINT16) (((UINT16) (sizeof (PXE_DB_GET_STATUS)) - (UINT16) (sizeof db->TxBuffer)) + (UINT16) (sizeof db->TxBuffer[0]));

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

  //
  // Issue UNDI command and check result.
  //
  DEBUG ((EFI_D_NET, "\nsnp->undi.get_status()  "));

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

  if (snp->cdb.StatCode != EFI_SUCCESS) {
    DEBUG (
      (EFI_D_NET,
      "\nsnp->undi.get_status()  %xh:%xh\n",
      snp->cdb.StatFlags,
      snp->cdb.StatFlags)
      );

    return EFI_DEVICE_ERROR;
  }
  //
  // report the values back..
  //
  if (InterruptStatusPtr != NULL) {
    InterruptFlags      = (UINT16) (snp->cdb.StatFlags & PXE_STATFLAGS_GET_STATUS_INTERRUPT_MASK);

    *InterruptStatusPtr = 0;

    if (InterruptFlags & PXE_STATFLAGS_GET_STATUS_RECEIVE) {
      *InterruptStatusPtr |= EFI_SIMPLE_NETWORK_RECEIVE_INTERRUPT;
    }

    if (InterruptFlags & PXE_STATFLAGS_GET_STATUS_TRANSMIT) {
      *InterruptStatusPtr |= EFI_SIMPLE_NETWORK_TRANSMIT_INTERRUPT;
    }

    if (InterruptFlags & PXE_STATFLAGS_GET_STATUS_COMMAND) {
      *InterruptStatusPtr |= EFI_SIMPLE_NETWORK_COMMAND_INTERRUPT;
    }

    if (InterruptFlags & PXE_STATFLAGS_GET_STATUS_SOFTWARE) {
      *InterruptStatusPtr |= EFI_SIMPLE_NETWORK_COMMAND_INTERRUPT;
    }

  }

  if (TransmitBufferListPtr != NULL) {
    *TransmitBufferListPtr =
      (
        (snp->cdb.StatFlags & PXE_STATFLAGS_GET_STATUS_NO_TXBUFS_WRITTEN) ||
        (snp->cdb.StatFlags & PXE_STATFLAGS_GET_STATUS_TXBUF_QUEUE_EMPTY)
      ) ? 0 : (VOID *) (UINTN) db->TxBuffer[0];

    TempData = (UINT64) (UINTN) (*TransmitBufferListPtr);
    if (snp->IsOldUndi && (TempData >= FOUR_GIGABYTES)) {
      del_v2p ((VOID *) (UINTN) (db->TxBuffer[0]));
    }
  }

  return EFI_SUCCESS;
}

EFI_STATUS
EFIAPI
snp_undi32_get_status (
  IN EFI_SIMPLE_NETWORK_PROTOCOL * this,
  OUT UINT32                     *InterruptStatusPtr OPTIONAL,
  OUT VOID                       **TransmitBufferListPtr OPTIONAL
  )
/*++

Routine Description:
 This is the SNP interface routine for getting the status
 This routine basically retrieves snp structure, checks the SNP state and
 calls the pxe_getstatus routine to actually get the undi status

Arguments:
 this  - context pointer
 InterruptStatusPtr - a non null pointer gets the interrupt status
 TransmitBufferListPtrs - a non null ointer gets the list of pointers of previously 
              transmitted buffers whose transmission was completed 
              asynchrnously.
              
Returns:

--*/
{
  SNP_DRIVER  *snp;

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

  snp = EFI_SIMPLE_NETWORK_DEV_FROM_THIS (this);

  if (snp == NULL) {
    return EFI_DEVICE_ERROR;
  }

  switch (snp->mode.State) {
  case EfiSimpleNetworkInitialized:
    break;

  case EfiSimpleNetworkStopped:
    return EFI_NOT_STARTED;

  case EfiSimpleNetworkStarted:
    return EFI_DEVICE_ERROR;

  default:
    return EFI_DEVICE_ERROR;
  }

  if (InterruptStatusPtr == NULL && TransmitBufferListPtr == NULL) {
    return EFI_INVALID_PARAMETER;
  }

  return pxe_getstatus (snp, InterruptStatusPtr, TransmitBufferListPtr);
}