static void controller_smart_access_complete (controller *currctlr, ioreq_event *curr)
{
struct ioq *queue = currctlr->devices[curr->devno].queue;
ioreq_event *done = ioreq_copy(curr);
int devno = curr->devno;
int numout;
/* Responds to completion interrupt */
done->type = IO_INTERRUPT_COMPLETE;
currctlr->outbusowned = controller_get_downward_busno(currctlr, done, NULL);
controller_send_event_down_path(currctlr, done, currctlr->ovrhd_disk_complete);
currctlr->outbusowned = -1;
/* Handles request completion, including call-backs into cache */
curr = ioqueue_physical_access_done(queue, curr);
while ((done = curr)) {
curr = curr->next;
/* call back into cache with completion -- let it do request_complete */
controller_smart_wakeup(currctlr, currctlr->cache->cache_disk_access_complete(currctlr->cache, done));
}
/* Initiate another request, if any pending */
numout = ioqueue_get_reqoutstanding(queue);
if ((numout < currctlr->devices[devno].maxoutstanding) && (curr = ioqueue_get_next_request(queue))) {
controller_send_event_down_path(currctlr, curr, currctlr->ovrhd_disk_request);
}
}
static void controller_smart_reconnect_to_transfer (controller *currctlr, ioreq_event *curr)
{
curr->type = IO_INTERRUPT_COMPLETE;
currctlr->outbusowned = controller_get_downward_busno(currctlr, curr, NULL);
controller_send_event_down_path(currctlr, curr, currctlr->ovrhd_disk_reconnect);
currctlr->outbusowned = -1;
}
static void controller_53c700_disconnect (controller *currctlr, ioreq_event *curr)
{
ioreq_event *ret;
#ifdef DEBUG_CTLRDUMB
fprintf (outputfile, "*** %f: controller_53c700_disconnect - devno %d, blkno %d\n, bcount %d, flags 0x%x\n", simtime, curr->devno, curr->blkno, curr->bcount, curr->flags );
#endif
switch (currctlr->state) {
case READ_DATA_TRANSFER:
case WRITE_DATA_TRANSFER:
case REQUEST_PENDING:
break;
default:
fprintf(stderr, "Completing request not transfering in controller_53c700_request_complete\n");
exit(1);
}
ret = ioreq_copy(curr);
ret->type = IO_INTERRUPT_COMPLETE;
currctlr->outbusowned = controller_get_downward_busno(currctlr, curr, NULL);
controller_send_event_down_path(currctlr, ret, currctlr->ovrhd_disk_disconnect);
currctlr->outbusowned = -1;
currctlr->state = DISCONNECT_PENDING;
controller_send_event_up_path(currctlr, curr, currctlr->ovrhd_disconnect);
}
void controller_passthru_event_arrive (controller *currctlr, ioreq_event *curr)
{
int busno;
int slotno;
#ifdef DEBUG_CTLRDUMB
dumpIOReq("controller_passthru_event_arrive", curr );
fflush(outputfile );
#endif
switch (curr->type) {
case IO_INTERRUPT_COMPLETE:
currctlr->outbusowned = controller_get_downward_busno(currctlr, curr, NULL);
controller_send_event_down_path(currctlr, curr, PASSTHRU_DELAY);
currctlr->outbusowned = -1;
break;
case IO_ACCESS_ARRIVE:
/*
fprintf (outputfile, "Following passthru_event path, and passing access down\n");
*/
controller_send_event_down_path(currctlr, curr, PASSTHRU_DELAY);
break;
case IO_INTERRUPT_ARRIVE:
if (curr->cause == READY_TO_TRANSFER) {
curr->cause = RECONNECT;
}
controller_send_event_up_path(currctlr, curr, PASSTHRU_DELAY);
break;
case DEVICE_DATA_TRANSFER_COMPLETE:
controller_send_event_up_path(currctlr, curr, (double) 0.0);
break;
case IO_QLEN_MAXCHECK:
busno = controller_get_downward_busno(currctlr, curr, &slotno);
bus_deliver_event(busno, slotno, curr);
break;
default:
fprintf(stderr, "Unknown event type arriving at passthru controller: %d\n", curr->type);
exit(1);
}
}
static void controller_53c700_reconnection_complete (controller *currctlr, ioreq_event *curr)
{
int read = curr->flags & READ;
#ifdef DEBUG_CTLRDUMB
fprintf (outputfile, "*** %f: controller_53c700_reconnection_complete - devno %d, blkno %d\n, bcount %d, flags 0x%x\n", simtime, curr->devno, curr->blkno, curr->bcount, curr->flags );
fflush( outputfile );
#endif
ASSERT(currctlr->state == RECONNECTING);
currctlr->outbusowned = controller_get_downward_busno(currctlr, curr, NULL);
controller_send_event_down_path(currctlr, curr, currctlr->ovrhd_disk_reconnect);
currctlr->outbusowned = -1;
currctlr->state = (read) ? READ_DATA_TRANSFER : WRITE_DATA_TRANSFER;
}
static void controller_53c700_ready_to_transfer (controller *currctlr, ioreq_event *curr)
{
#ifdef DEBUG_CTLRDUMB
fprintf (outputfile, "*** %f: controller_53c700_ready_to_transfer - devno %d, blkno %d\n, bcount %d, flags 0x%x\n", simtime, curr->devno, curr->blkno, curr->bcount, curr->flags );
fflush( outputfile );
#endif
ASSERT(currctlr->state == REQUEST_PENDING);
currctlr->state = (curr->flags & READ) ? READ_DATA_TRANSFER : WRITE_DATA_TRANSFER;
curr->type = IO_INTERRUPT_COMPLETE;
curr->cause = RECONNECT;
currctlr->outbusowned = controller_get_downward_busno(currctlr, curr, NULL);
controller_send_event_down_path(currctlr, curr, currctlr->ovrhd_disk_ready);
/* shouldn't we also be sending a message up the path?? ovrhd_ready?? */
currctlr->outbusowned = -1;
}
void controller_53c700_event_arrive (controller *currctlr, ioreq_event *curr)
{
int busno;
int slotno;
#ifdef DEBUG_CTLRDUMB
dumpIOReq("controller_53c700_event_arrive", curr );
fflush(outputfile );
#endif
switch (curr->type) {
case IO_ACCESS_ARRIVE:
controller_53c700_request_arrive(currctlr, curr);
break;
case IO_INTERRUPT_ARRIVE:
controller_53c700_interrupt_arrive(currctlr, curr);
break;
case IO_INTERRUPT_COMPLETE:
controller_53c700_interrupt_complete(currctlr, curr);
break;
case DEVICE_DATA_TRANSFER_COMPLETE:
controller_53c700_data_transfer(currctlr, curr);
break;
case CONTROLLER_DATA_TRANSFER_COMPLETE:
controller_53c700_data_transfer_complete(currctlr, curr);
break;
case IO_QLEN_MAXCHECK:
busno = controller_get_downward_busno(currctlr, curr, &slotno);
bus_deliver_event(busno, slotno, curr);
break;
default:
fprintf(stderr, "Unknown event type arriving at 53c700 controller: %d\n", curr->type);
exit(1);
}
}