eisa_dma_enable(D3X)

NAME
     eisa_dma_enable - enable recognition of hardware requests on a DMA
     channel

SYNOPSIS
     #include <sys/eisa.h>

     void eisa_dma_enable(vint_t adap, init chan);

   Arguments
     adap Bus adapter number (zero on an Indigo2).

     chan Channel to be enabled.

DESCRIPTION
     The eisa_dma_enable routine enables recognition of hardware requests on
     the DMA channel chan.

     After enabling the channel for a hardware initiated transfer, this
     function calls the procedure proc() from the command block used to
     program the DMA hardware start sequence. It will then sleep awaiting
     completion of the dma operation specified by the command block, depending
     on the value of mode. Note that mode must be EISA_DMA_NOSLEEP in Release
     5.1.

     The caller must ensure that it is acting on behalf of the channel owner,
     and that it makes sense to release the channel. The caller must also
     ensure that the channel is in use for hardware-initiated DMA transfers
     and not software-initiated transfers.

   Return Values
     None

   Level
     Base or Interrupt

   Notes
     Does not sleep