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(uint_t adap, struct eisa_dma_cb, int chan, uchar_t mode);

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

     eisa_dma_cb
          Eisa DMA control block for the device.

     chan Channel to be enabled.

     mode Mode in which the channel is to be disabled.

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