-static int RupIntr;
-static int RxIntr;
-static int TxIntr;
-void
-RIOServiceHost(p, HostP, From)
-struct rio_info * p;
-struct Host *HostP;
-int From;
-{
- rio_spin_lock (&HostP->HostLock);
- if ( (HostP->Flags & RUN_STATE) != RC_RUNNING ) {
- static int t =0;
- rio_spin_unlock (&HostP->HostLock);
- if ((t++ % 200) == 0)
- rio_dprintk (RIO_DEBUG_INTR, "Interrupt but host not running. flags=%x.\n", (int)HostP->Flags);
- return;
- }
- rio_spin_unlock (&HostP->HostLock);
-
- if ( RWORD( HostP->ParmMapP->rup_intr ) ) {
- WWORD( HostP->ParmMapP->rup_intr , 0 );
- p->RIORupCount++;
- RupIntr++;
- rio_dprintk (RIO_DEBUG_INTR, "rio: RUP interrupt on host %d\n", HostP-p->RIOHosts);
- RIOPollHostCommands(p, HostP );
- }
-
- if ( RWORD( HostP->ParmMapP->rx_intr ) ) {
- int port;
-
- WWORD( HostP->ParmMapP->rx_intr , 0 );
- p->RIORxCount++;
- RxIntr++;
-
- rio_dprintk (RIO_DEBUG_INTR, "rio: RX interrupt on host %d\n", HostP-p->RIOHosts);
- /*
- ** Loop through every port. If the port is mapped into
- ** the system ( i.e. has /dev/ttyXXXX associated ) then it is
- ** worth checking. If the port isn't open, grab any packets
- ** hanging on its receive queue and stuff them on the free
- ** list; check for commands on the way.
- */
- for ( port=p->RIOFirstPortsBooted;
- port<p->RIOLastPortsBooted+PORTS_PER_RTA; port++ ) {
- struct Port *PortP = p->RIOPortp[port];
- struct tty_struct *ttyP;
- struct PKT *PacketP;
-
- /*
- ** not mapped in - most of the RIOPortp[] information
- ** has not been set up!
- ** Optimise: ports come in bundles of eight.
- */
- if ( !PortP->Mapped ) {
- port += 7;
- continue; /* with the next port */
- }
-
- /*
- ** If the host board isn't THIS host board, check the next one.
- ** optimise: ports come in bundles of eight.
- */
- if ( PortP->HostP != HostP ) {
- port += 7;
- continue;
- }
-
- /*
- ** Let us see - is the port open? If not, then don't service it.
- */
- if ( !( PortP->PortState & PORT_ISOPEN ) ) {
- continue;
- }
-
- /*
- ** find corresponding tty structure. The process of mapping
- ** the ports puts these here.
- */
- ttyP = PortP->gs.tty;
-
- /*
- ** Lock the port before we begin working on it.
- */
- rio_spin_lock(&PortP->portSem);
-
- /*
- ** Process received data if there is any.
- */
- if ( can_remove_receive( &PacketP, PortP ) )
- RIOReceive(p, PortP);
-
- /*
- ** If there is no data left to be read from the port, and
- ** it's handshake bit is set, then we must clear the handshake,
- ** so that that downstream RTA is re-enabled.
- */
- if ( !can_remove_receive( &PacketP, PortP ) &&
- ( RWORD( PortP->PhbP->handshake )==PHB_HANDSHAKE_SET ) ) {
- /*
- ** MAGIC! ( Basically, handshake the RX buffer, so that
- ** the RTAs upstream can be re-enabled. )
- */
- rio_dprintk (RIO_DEBUG_INTR, "Set RX handshake bit\n");
- WWORD( PortP->PhbP->handshake,
- PHB_HANDSHAKE_SET|PHB_HANDSHAKE_RESET );
- }
- rio_spin_unlock(&PortP->portSem);
- }
- }
-
- if ( RWORD( HostP->ParmMapP->tx_intr ) ) {
- int port;
-
- WWORD( HostP->ParmMapP->tx_intr , 0);
-
- p->RIOTxCount++;
- TxIntr++;
- rio_dprintk (RIO_DEBUG_INTR, "rio: TX interrupt on host %d\n", HostP-p->RIOHosts);
-
- /*
- ** Loop through every port.
- ** If the port is mapped into the system ( i.e. has /dev/ttyXXXX
- ** associated ) then it is worth checking.
- */
- for ( port=p->RIOFirstPortsBooted;
- port<p->RIOLastPortsBooted+PORTS_PER_RTA; port++ ) {
- struct Port *PortP = p->RIOPortp[port];
- struct tty_struct *ttyP;
- struct PKT *PacketP;
-
- /*
- ** not mapped in - most of the RIOPortp[] information
- ** has not been set up!
- */
- if ( !PortP->Mapped ) {
- port += 7;
- continue; /* with the next port */
- }
-
- /*
- ** If the host board isn't running, then its data structures
- ** are no use to us - continue quietly.
- */
- if ( PortP->HostP != HostP ) {
- port += 7;
- continue; /* with the next port */
- }
-
- /*
- ** Let us see - is the port open? If not, then don't service it.
- */
- if ( !( PortP->PortState & PORT_ISOPEN ) ) {
- continue;
- }
-
- rio_dprintk (RIO_DEBUG_INTR, "rio: Looking into port %d.\n", port);
- /*
- ** Lock the port before we begin working on it.
- */
- rio_spin_lock(&PortP->portSem);
-
- /*
- ** If we can't add anything to the transmit queue, then
- ** we need do none of this processing.
- */
- if ( !can_add_transmit( &PacketP, PortP ) ) {
- rio_dprintk (RIO_DEBUG_INTR, "Can't add to port, so skipping.\n");
- rio_spin_unlock(&PortP->portSem);
- continue;
- }
-
- /*
- ** find corresponding tty structure. The process of mapping
- ** the ports puts these here.
- */
- ttyP = PortP->gs.tty;
- /* If ttyP is NULL, the port is getting closed. Forget about it. */
- if (!ttyP) {
- rio_dprintk (RIO_DEBUG_INTR, "no tty, so skipping.\n");
- rio_spin_unlock(&PortP->portSem);
- continue;
- }
- /*
- ** If there is more room available we start up the transmit
- ** data process again. This can be direct I/O, if the cookmode
- ** is set to COOK_RAW or COOK_MEDIUM, or will be a call to the
- ** riotproc( T_OUTPUT ) if we are in COOK_WELL mode, to fetch
- ** characters via the line discipline. We must always call
- ** the line discipline,
- ** so that user input characters can be echoed correctly.
- **
- ** ++++ Update +++++
- ** With the advent of double buffering, we now see if
- ** TxBufferOut-In is non-zero. If so, then we copy a packet
- ** to the output place, and set it going. If this empties
- ** the buffer, then we must issue a wakeup( ) on OUT.
- ** If it frees space in the buffer then we must issue
- ** a wakeup( ) on IN.
- **
- ** ++++ Extra! Extra! If PortP->WflushFlag is set, then we
- ** have to send a WFLUSH command down the PHB, to mark the
- ** end point of a WFLUSH. We also need to clear out any
- ** data from the double buffer! ( note that WflushFlag is a
- ** *count* of the number of WFLUSH commands outstanding! )
- **
- ** ++++ And there's more!
- ** If an RTA is powered off, then on again, and rebooted,
- ** whilst it has ports open, then we need to re-open the ports.
- ** ( reasonable enough ). We can't do this when we spot the
- ** re-boot, in interrupt time, because the queue is probably
- ** full. So, when we come in here, we need to test if any
- ** ports are in this condition, and re-open the port before
- ** we try to send any more data to it. Now, the re-booted
- ** RTA will be discarding packets from the PHB until it
- ** receives this open packet, but don't worry tooo much
- ** about that. The one thing that is interesting is the
- ** combination of this effect and the WFLUSH effect!
- */
- /* For now don't handle RTA reboots. -- REW.
- Reenabled. Otherwise RTA reboots didn't work. Duh. -- REW */
- if ( PortP->MagicFlags ) {
-#if 1
- if ( PortP->MagicFlags & MAGIC_REBOOT ) {
- /*
- ** well, the RTA has been rebooted, and there is room
- ** on its queue to add the open packet that is required.
- **
- ** The messy part of this line is trying to decide if
- ** we need to call the Param function as a tty or as
- ** a modem.
- ** DONT USE CLOCAL AS A TEST FOR THIS!
- **
- ** If we can't param the port, then move on to the
- ** next port.
- */
- PortP->InUse = NOT_INUSE;
-
- rio_spin_unlock(&PortP->portSem);
- if ( RIOParam(PortP, OPEN, ((PortP->Cor2Copy &
- (COR2_RTSFLOW|COR2_CTSFLOW ) )==
- (COR2_RTSFLOW|COR2_CTSFLOW ) ) ?
- TRUE : FALSE, DONT_SLEEP ) == RIO_FAIL ) {
- continue; /* with next port */
- }
- rio_spin_lock(&PortP->portSem);
- PortP->MagicFlags &= ~MAGIC_REBOOT;
- }
-#endif