BSP Developer's Guide

I
Writing a SCSI-2 Device Driver
/***************************************************************************
*
* xxxEventTypeGet - parse SCSI and DMA status registers at interrupt time
*
* RETURNS: an interrupt (event) type code
*/
LOCAL int xxxEventTypeGet
(
SIOP * pSiop
)
{
/* Read interrupt status registers */
key = intLock ();
/* Check for fatal errors first */
/* No fatal errors; try the rest (order of tests is important) */
return (INTERRUPT_TYPE);
}
/***************************************************************************
*
* xxxThreadActivate - activate a SCSI connection for an initiator thread
*
* Set whatever thread/controller state variables need to be set. Ensure that
* all buffers used by the thread are coherent with the contents of the
* system caches (if any).
*
* Set transfer parameters for the thread based on what its target device
* last negotiated.
*
* Update the thread context (including shared memory area) and note that
* there is a new client script to be activated (see "xxxActivate()").
*
* Set the thread's state to ESTABLISHED.
* Do not wait for the script to be activated. Completion of the script is
* signalled by an event which is handled by "xxxEvent()".
*
* RETURNS: OK or ERROR
*/
LOCAL STATUS xxxThreadActivate
(
SIOP * pSiop, /* ptr to controller info */
XXX_THREAD * pThread /* ptr to thread info */
)
{
scsiCacheSynchronize (pScsiThread, SCSI_CACHE_PRE_COMMAND);
I
scsiWideXferNegotiate (pScsiCtrl, pScsiTarget, WIDE_XFER_NEW_THREAD);
scsiSyncXferNegotiate (pScsiCtrl, pScsiTarget, SYNC_XFER_NEW_THREAD);
if (xxxThreadParamsSet (pThread, pScsiTarget->xferOffset,
pScsiTarget->xferPeriod) != OK)
return (ERROR);
343