cvs commit: src/sys/dev/hatm if_hatm_tx.c

[Hartmut Brandt]

harti       2003/10/29 07:15:19 PST

  FreeBSD src repository

  Modified files:
    sys/dev/hatm         if_hatm_tx.c 
  Log:
  Allow sending of more than one raw cell from a single mbuf. Only the
  very first cell in the mbuf should have a cell header word (of which
  everything except the payload type and the CLP bit is ignored). All
  other cells should be 48 byte and get the same header as the first cell.
  
  This fixes a problem with sending more than 120000 raw cells/sec through
  an HE155. The card seems to need 2 cell times to DMA the transmit buffer
  ready queue entry and the transmit buffer descriptor so at 1/3 the
  link rate the transmit buffer ready queue starts to fill up. Even with this
  patch it's obviously impossible to send raw cells at link rate.
  
  Revision  Changes    Path
  1.8       +11 -8     src/sys/dev/hatm/if_hatm_tx.c