patch-2.2.15 linux/drivers/char/rio/riocmd.c

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diff -u --new-file --recursive --exclude-from ../../exclude v2.2.14/drivers/char/rio/riocmd.c linux/drivers/char/rio/riocmd.c
@@ -0,0 +1,1146 @@
+/*
+** -----------------------------------------------------------------------------
+**
+**  Perle Specialix driver for Linux
+**  ported from the existing SCO driver source
+**
+ *
+ *  (C) 1990 - 2000 Specialix International Ltd., Byfleet, Surrey, UK.
+ *
+ *      This program is free software; you can redistribute it and/or modify
+ *      it under the terms of the GNU General Public License as published by
+ *      the Free Software Foundation; either version 2 of the License, or
+ *      (at your option) any later version.
+ *
+ *      This program is distributed in the hope that it will be useful,
+ *      but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *      GNU General Public License for more details.
+ *
+ *      You should have received a copy of the GNU General Public License
+ *      along with this program; if not, write to the Free Software
+ *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+**
+**	Module		: riocmd.c
+**	SID		: 1.2
+**	Last Modified	: 11/6/98 10:33:41
+**	Retrieved	: 11/6/98 10:33:49
+**
+**  ident @(#)riocmd.c	1.2
+**
+** -----------------------------------------------------------------------------
+*/
+#ifdef SCCS_LABELS
+static char *_riocmd_c_sccs_ = "@(#)riocmd.c	1.2";
+#endif
+
+#define __NO_VERSION__
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/malloc.h>
+#include <linux/errno.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/string.h>
+#include <asm/semaphore.h>
+#include <asm/spinlock.h>
+
+
+#include <linux/termios.h>
+#include <linux/serial.h>
+
+#include <linux/compatmac.h>
+#include <linux/generic_serial.h>
+
+#include "linux_compat.h"
+#include "rio_linux.h"
+#include "typdef.h"
+#include "pkt.h"
+#include "daemon.h"
+#include "rio.h"
+#include "riospace.h"
+#include "top.h"
+#include "cmdpkt.h"
+#include "map.h"
+#include "riotypes.h"
+#include "rup.h"
+#include "port.h"
+#include "riodrvr.h"
+#include "rioinfo.h"
+#include "func.h"
+#include "errors.h"
+#include "pci.h"
+
+#include "parmmap.h"
+#include "unixrup.h"
+#include "board.h"
+#include "host.h"
+#include "error.h"
+#include "phb.h"
+#include "link.h"
+#include "cmdblk.h"
+#include "route.h"
+#include "control.h"
+#include "cirrus.h"
+
+
+static struct IdentifyRta IdRta;
+static struct KillNeighbour KillUnit;
+
+int
+RIOFoadRta(HostP, MapP)
+struct Host *	HostP;
+struct Map *	MapP;
+{
+	struct CmdBlk *CmdBlkP;
+
+	rio_dprint(RIO_DEBUG_CMD, ("FOAD RTA\n"));
+
+	CmdBlkP = RIOGetCmdBlk();
+
+	if ( !CmdBlkP ) {
+		rio_dprint(RIO_DEBUG_CMD, ("FOAD RTA: GetCmdBlk failed\n"));
+		return ENXIO;
+	}
+
+	CmdBlkP->Packet.dest_unit = MapP->ID;
+	CmdBlkP->Packet.dest_port = BOOT_RUP;
+	CmdBlkP->Packet.src_unit  = 0;
+	CmdBlkP->Packet.src_port  = BOOT_RUP;
+	CmdBlkP->Packet.len	   = 0x84;
+	CmdBlkP->Packet.data[0]   = IFOAD;
+	CmdBlkP->Packet.data[1]   = 0;
+	CmdBlkP->Packet.data[2]   = IFOAD_MAGIC & 0xFF;
+	CmdBlkP->Packet.data[3]   = (IFOAD_MAGIC >> 8) & 0xFF;
+
+	if ( RIOQueueCmdBlk( HostP, MapP->ID-1, CmdBlkP) == RIO_FAIL ) {
+		rio_dprint(RIO_DEBUG_CMD, ("FOAD RTA: Failed to queue foad command\n"));
+		return EIO;
+	}
+	return 0;
+}
+
+int
+RIOZombieRta(HostP, MapP)
+struct Host *	HostP;
+struct Map *	MapP;
+{
+	struct CmdBlk *CmdBlkP;
+
+	rio_dprint(RIO_DEBUG_CMD, ("ZOMBIE RTA\n"));
+
+	CmdBlkP = RIOGetCmdBlk();
+
+	if ( !CmdBlkP ) {
+		rio_dprint(RIO_DEBUG_CMD, ("ZOMBIE RTA: GetCmdBlk failed\n"));
+		return ENXIO;
+	}
+
+	CmdBlkP->Packet.dest_unit = MapP->ID;
+	CmdBlkP->Packet.dest_port = BOOT_RUP;
+	CmdBlkP->Packet.src_unit  = 0;
+	CmdBlkP->Packet.src_port  = BOOT_RUP;
+	CmdBlkP->Packet.len	   = 0x84;
+	CmdBlkP->Packet.data[0]   = ZOMBIE;
+	CmdBlkP->Packet.data[1]   = 0;
+	CmdBlkP->Packet.data[2]   = ZOMBIE_MAGIC & 0xFF;
+	CmdBlkP->Packet.data[3]   = (ZOMBIE_MAGIC >> 8) & 0xFF;
+
+	if ( RIOQueueCmdBlk( HostP, MapP->ID-1, CmdBlkP) == RIO_FAIL ) {
+		rio_dprint(RIO_DEBUG_CMD, ("ZOMBIE RTA: Failed to queue zombie command\n"));
+		return EIO;
+	}
+	return 0;
+}
+
+int
+RIOCommandRta(p, RtaUnique, func)
+struct rio_info *	p;
+uint RtaUnique;
+int (* func)( struct Host *HostP, struct Map *MapP );
+{
+	uint Host;
+
+	rio_dprint(RIO_DEBUG_CMD, ("Command RTA 0x%x func 0x%x\n", RtaUnique, (int)func ));
+
+	if ( !RtaUnique )
+		return(0);
+
+	for ( Host = 0; Host < p->RIONumHosts; Host++ ) {
+		uint Rta;
+		struct Host *HostP = &p->RIOHosts[Host];
+
+		for ( Rta = 0; Rta < RTAS_PER_HOST; Rta++ ) {
+			struct Map *MapP = &HostP->Mapping[Rta];
+
+			if ( MapP->RtaUniqueNum == RtaUnique ) {
+				uint Link;
+
+				/*
+				** now, lets just check we have a route to it...
+				** IF the routing stuff is working, then one of the
+				** topology entries for this unit will have a legit
+				** route *somewhere*. We care not where - if its got
+				** any connections, we can get to it.
+				*/
+				for ( Link = 0; Link < LINKS_PER_UNIT; Link++ ) {
+					if ( MapP->Topology[Link].Unit <= (uchar)MAX_RUP ) {
+						/*
+						** Its worth trying the operation...
+						*/
+						return (*func)( HostP, MapP );
+					}
+				}
+			}
+		}
+	}
+	return ENXIO;
+}
+
+
+int
+RIOIdentifyRta(p, arg)
+struct rio_info *	p;
+caddr_t arg;
+{
+	uint Host;
+
+	if ( copyin( (int)arg, (caddr_t)&IdRta, sizeof(IdRta) ) == COPYFAIL ) {
+		rio_dprint(RIO_DEBUG_CMD, ("RIO_IDENTIFY_RTA copy failed\n"));
+		p->RIOError.Error = COPYIN_FAILED;
+		return EFAULT;
+	}
+
+	for ( Host = 0 ; Host < p->RIONumHosts; Host++ ) {
+		uint Rta;
+		struct Host *HostP = &p->RIOHosts[Host];
+
+		for ( Rta = 0; Rta < RTAS_PER_HOST; Rta++ ) {
+			struct Map *MapP = &HostP->Mapping[Rta];
+
+			if ( MapP->RtaUniqueNum == IdRta.RtaUnique ) {
+				uint Link;
+				/*
+				** now, lets just check we have a route to it...
+				** IF the routing stuff is working, then one of the
+				** topology entries for this unit will have a legit
+				** route *somewhere*. We care not where - if its got
+				** any connections, we can get to it.
+				*/
+				for ( Link = 0; Link < LINKS_PER_UNIT; Link++ ) {
+					if ( MapP->Topology[Link].Unit <= (uchar)MAX_RUP ) {
+						/*
+						** Its worth trying the operation...
+						*/
+						struct CmdBlk *CmdBlkP;
+
+						rio_dprint(RIO_DEBUG_CMD, ("IDENTIFY RTA\n"));
+
+						CmdBlkP = RIOGetCmdBlk();
+
+						if ( !CmdBlkP ) {
+							rio_dprint(RIO_DEBUG_CMD, ("IDENTIFY RTA: GetCmdBlk failed\n"));
+							return ENXIO;
+						}
+		
+						CmdBlkP->Packet.dest_unit = MapP->ID;
+						CmdBlkP->Packet.dest_port = BOOT_RUP;
+						CmdBlkP->Packet.src_unit  = 0;
+						CmdBlkP->Packet.src_port  = BOOT_RUP;
+						CmdBlkP->Packet.len	   = 0x84;
+						CmdBlkP->Packet.data[0]   = IDENTIFY;
+						CmdBlkP->Packet.data[1]   = 0;
+						CmdBlkP->Packet.data[2]   = IdRta.ID;
+		
+						if ( RIOQueueCmdBlk( HostP, MapP->ID-1, CmdBlkP) 
+										== RIO_FAIL ) {
+							rio_dprint(RIO_DEBUG_CMD, ("IDENTIFY RTA: Failed to queue command\n"));
+							return EIO;
+						}
+						return 0;
+					}
+				}
+			}
+		}
+	} 
+	return ENOENT;
+}
+
+
+int
+RIOKillNeighbour(p, arg)
+struct rio_info *	p;
+caddr_t arg;
+{
+	uint Host;
+	uint ID;
+	struct Host *HostP;
+	struct CmdBlk *CmdBlkP;
+
+	rio_dprint(RIO_DEBUG_CMD, ("KILL HOST NEIGHBOUR\n"));
+
+	if ( copyin( (int)arg, (caddr_t)&KillUnit, 
+					sizeof(KillUnit) ) == COPYFAIL ) {
+		rio_dprint(RIO_DEBUG_CMD, ("RIO_KILL_NEIGHBOUR copy failed\n"));
+		p->RIOError.Error = COPYIN_FAILED;
+		return EFAULT;
+	}
+
+	if ( KillUnit.Link > 3 )
+		return ENXIO;
+ 
+	CmdBlkP = RIOGetCmdBlk();
+
+	if ( !CmdBlkP ) {
+		rio_dprint(RIO_DEBUG_CMD, ("UFOAD: GetCmdBlk failed\n"));
+		return ENXIO;
+	}
+
+	CmdBlkP->Packet.dest_unit = 0;
+	CmdBlkP->Packet.src_unit  = 0;
+	CmdBlkP->Packet.dest_port = BOOT_RUP;
+	CmdBlkP->Packet.src_port  = BOOT_RUP;
+	CmdBlkP->Packet.len	   = 0x84;
+	CmdBlkP->Packet.data[0]   = UFOAD;
+	CmdBlkP->Packet.data[1]   = KillUnit.Link;
+	CmdBlkP->Packet.data[2]   = UFOAD_MAGIC & 0xFF;
+	CmdBlkP->Packet.data[3]   = (UFOAD_MAGIC >> 8) & 0xFF;
+
+	for ( Host = 0; Host < p->RIONumHosts; Host++ ) {
+		ID = 0;
+		HostP = &p->RIOHosts[Host];
+
+		if ( HostP->UniqueNum == KillUnit.UniqueNum ) {
+			if ( RIOQueueCmdBlk( HostP, RTAS_PER_HOST+KillUnit.Link,
+							CmdBlkP) == RIO_FAIL ) {
+				rio_dprint(RIO_DEBUG_CMD, ("UFOAD: Failed queue command\n"));
+				return EIO;
+			}
+			return 0;
+		}
+
+		for ( ID=0; ID < RTAS_PER_HOST; ID++ ) {
+			if ( HostP->Mapping[ID].RtaUniqueNum == KillUnit.UniqueNum ) {
+				CmdBlkP->Packet.dest_unit = ID+1;
+				if ( RIOQueueCmdBlk( HostP, ID, CmdBlkP) == RIO_FAIL ) {
+					rio_dprint(RIO_DEBUG_CMD, ("UFOAD: Failed queue command\n"));
+					return EIO;
+				}
+				return 0;
+			}
+		}
+	}
+	RIOFreeCmdBlk( CmdBlkP );
+	return ENXIO;
+}
+
+int
+RIOSuspendBootRta(HostP, ID, Link)
+struct Host *HostP;
+int ID;
+int Link; 
+{
+	struct CmdBlk *CmdBlkP;
+
+	rio_dprint(RIO_DEBUG_CMD, ("SUSPEND BOOT ON RTA ID %d, link %c\n", ID, 'A' + Link));
+
+	CmdBlkP = RIOGetCmdBlk();
+
+	if ( !CmdBlkP ) {
+		rio_dprint(RIO_DEBUG_CMD, ("SUSPEND BOOT ON RTA: GetCmdBlk failed\n"));
+		return ENXIO;
+	}
+
+	CmdBlkP->Packet.dest_unit = ID;
+	CmdBlkP->Packet.dest_port = BOOT_RUP;
+	CmdBlkP->Packet.src_unit  = 0;
+	CmdBlkP->Packet.src_port  = BOOT_RUP;
+	CmdBlkP->Packet.len	   = 0x84;
+	CmdBlkP->Packet.data[0]   = IWAIT;
+	CmdBlkP->Packet.data[1]   = Link;
+	CmdBlkP->Packet.data[2]   = IWAIT_MAGIC & 0xFF;
+	CmdBlkP->Packet.data[3]   = (IWAIT_MAGIC >> 8) & 0xFF;
+
+	if ( RIOQueueCmdBlk( HostP, ID - 1, CmdBlkP) == RIO_FAIL ) {
+		rio_dprint(RIO_DEBUG_CMD, ("SUSPEND BOOT ON RTA: Failed to queue iwait command\n"));
+		return EIO;
+	}
+	return 0;
+}
+
+int
+RIOFoadWakeup(p)
+struct rio_info *	p;
+{
+	int port;
+	register struct Port *PortP;
+	unsigned long flags;
+
+	for ( port=0; port<RIO_PORTS; port++) {
+		PortP = p->RIOPortp[port];
+
+		rio_spin_lock_irqsave(&PortP->portSem, flags);
+		PortP->Config = 0;
+		PortP->State = 0;
+		PortP->InUse = NOT_INUSE;
+		PortP->PortState = 0;
+		PortP->FlushCmdBodge = 0;
+		PortP->ModemLines = 0;
+		PortP->ModemState = 0;
+		PortP->CookMode = 0;
+		PortP->ParamSem = 0;
+		PortP->Mapped = 0;
+		PortP->WflushFlag = 0;
+		PortP->MagicFlags = 0;
+		PortP->RxDataStart = 0;
+		PortP->TxBufferIn = 0;
+		PortP->TxBufferOut = 0;
+		rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+	}
+	return(0);
+}
+
+/*
+** Incoming command on the COMMAND_RUP to be processed.
+*/
+int
+RIOCommandRup(p, Rup, HostP, PacketP)
+struct rio_info *	p;
+uint Rup;
+struct Host *HostP;
+PKT *PacketP; 
+{
+	struct PktCmd *PktCmdP = (struct PktCmd *)PacketP->data;
+	struct Port *PortP;
+	struct UnixRup *UnixRupP;
+	ushort SysPort;
+	ushort ReportedModemStatus;
+	ushort rup;
+	ushort subCommand;
+	unsigned long flags;
+
+
+#ifdef CHECK
+	CheckHost( Host );
+	CheckHostP( HostP );
+	CheckPacketP( PacketP );
+#endif
+
+	/*
+	** 16 port RTA note:
+	** Command rup packets coming from the RTA will have pkt->data[1] (which
+	** translates to PktCmdP->PhbNum) set to the host port number for the
+	** particular unit. To access the correct BaseSysPort for a 16 port RTA,
+	** we can use PhbNum to get the rup number for the appropriate 8 port
+	** block (for the first block, this should be equal to 'Rup').
+	*/
+	rup = RBYTE(PktCmdP->PhbNum) / (ushort)PORTS_PER_RTA;
+	UnixRupP = &HostP->UnixRups[rup];
+	SysPort = UnixRupP->BaseSysPort + 
+			(RBYTE(PktCmdP->PhbNum) % (ushort)PORTS_PER_RTA);
+	rio_dprint(RIO_DEBUG_CMD, ("Command on rup %d, port %d\n", rup, SysPort));
+
+#ifdef CHECK
+	CheckRup( rup );
+	CheckUnixRupP( UnixRupP );
+#endif
+	if ( UnixRupP->BaseSysPort == NO_PORT ) {
+		rio_dprint(RIO_DEBUG_CMD, ("OBSCURE ERROR!\n"));
+		rio_dprint(RIO_DEBUG_CMD, ("Diagnostics follow. Please WRITE THESE DOWN and report them to Specialix Technical Support\n"));
+		rio_dprint(RIO_DEBUG_CMD, ("CONTROL information: Host number %d, name ``%s''\n", 
+					HostP-p->RIOHosts, HostP->Name ));
+		rio_dprint(RIO_DEBUG_CMD, ("CONTROL information: Rup number  0x%x\n", rup));
+
+		if ( Rup >= (ushort)MAX_RUP )
+			rio_dprint(RIO_DEBUG_CMD, ("CONTROL information: This is the RUP for RTA ``%s''\n",
+						HostP->Mapping[Rup].Name ));
+		else
+			rio_dprint(RIO_DEBUG_CMD, ("CONTROL information: This is the RUP for link ``%c'' of host ``%s''\n", 'A' + Rup - MAX_RUP, HostP->Name ));
+
+		rio_dprint(RIO_DEBUG_CMD, ("PACKET information: Destination 0x%x:0x%x\n",
+					PacketP->dest_unit, PacketP->dest_port ));
+		rio_dprint(RIO_DEBUG_CMD, ("PACKET information: Source	  0x%x:0x%x\n",
+					PacketP->src_unit, PacketP->src_port ));
+		rio_dprint(RIO_DEBUG_CMD, ("PACKET information: Length	  0x%x (%d)\n", PacketP->len,PacketP->len ));
+		rio_dprint(RIO_DEBUG_CMD, ("PACKET information: Control	 0x%x (%d)\n", PacketP->control, PacketP->control));
+		rio_dprint(RIO_DEBUG_CMD, ("PACKET information: Check	   0x%x (%d)\n", PacketP->csum, PacketP->csum ));
+		rio_dprint(RIO_DEBUG_CMD, ("COMMAND information: Host Port Number 0x%x, 
+					Command Code 0x%x\n", PktCmdP->PhbNum, PktCmdP->Command ));
+		return TRUE;
+	}
+
+#ifdef CHECK
+	CheckSysPort( SysPort );
+#endif
+	PortP = p->RIOPortp[ SysPort ];
+#if 0
+	ttyP = PortP->TtyP;
+#endif
+	rio_spin_lock_irqsave(&PortP->portSem, flags);
+	switch( RBYTE(PktCmdP->Command) ) {
+		case BREAK_RECEIVED:
+			rio_dprint(RIO_DEBUG_CMD, ("Received a break!\n"));
+			/* If the current line disc. is not multi-threading and
+	   			the current processor is not the default, reset rup_intr
+	   			and return FALSE to ensure that the command packet is
+	   			not freed. */
+			/* Call tmgr HANGUP HERE */
+			/* Fix this later when every thing works !!!! RAMRAJ */
+			break;
+
+		case COMPLETE:
+			rio_dprint(RIO_DEBUG_CMD, ("Command complete on phb %d host %d\n",
+							RBYTE(PktCmdP->PhbNum), HostP-p->RIOHosts));
+			subCommand = 1;
+			switch (RBYTE(PktCmdP->SubCommand)) {
+				case MEMDUMP :
+					rio_dprint(RIO_DEBUG_CMD, ("Memory dump cmd (0x%x) from addr 0x%x\n",
+		 				RBYTE(PktCmdP->SubCommand), RWORD(PktCmdP->SubAddr)));
+					break;
+				case READ_REGISTER :
+					rio_dprint(RIO_DEBUG_CMD, ("Read register (0x%x)\n", RWORD(PktCmdP->SubAddr)));
+					p->CdRegister = (RBYTE(PktCmdP->ModemStatus) & MSVR1_HOST);
+					break;
+				default :
+					subCommand = 0;
+				break;
+			}
+			if (subCommand)
+				break;
+			rio_dprint(RIO_DEBUG_CMD, ("New status is 0x%x was 0x%x\n",
+					 RBYTE(PktCmdP->PortStatus),PortP->PortState));
+			if (PortP->PortState != RBYTE(PktCmdP->PortStatus)) {
+				rio_dprint(RIO_DEBUG_CMD, ("Mark status & wakeup\n"));
+				PortP->PortState = RBYTE(PktCmdP->PortStatus);
+				/* What should we do here ...
+				wakeup( &PortP->PortState );
+				*/
+			}
+			else {
+				rio_dprint(RIO_DEBUG_CMD, ("No change\n"));
+			}
+
+			/* FALLTHROUGH */
+		case MODEM_STATUS:
+			/*
+			** Knock out the tbusy and tstop bits, as these are not relevant
+			** to the check for modem status change (they're just there because
+			** it's a convenient place to put them!).
+			*/
+			ReportedModemStatus = RBYTE(PktCmdP->ModemStatus);
+			if ((PortP->ModemState & MSVR1_HOST) ==
+					(ReportedModemStatus & MSVR1_HOST)) {
+				rio_dprint(RIO_DEBUG_CMD, ("Modem status unchanged 0x%x\n", PortP->ModemState));
+				/*
+				** Update ModemState just in case tbusy or tstop states have
+				** changed.
+				*/
+				PortP->ModemState = ReportedModemStatus;
+			}
+			else {
+				rio_dprint(RIO_DEBUG_CMD, ("Modem status change from 0x%x to 0x%x\n",
+							 PortP->ModemState, ReportedModemStatus));
+				PortP->ModemState = ReportedModemStatus;
+#ifdef MODEM_SUPPORT
+				if ( PortP->Mapped ) {
+				/***********************************************************\
+				*************************************************************
+				***													   ***
+				***		  M O D E M   S T A T E   C H A N G E		  ***
+				***													   ***
+				*************************************************************
+				\***********************************************************/
+				/*
+				** If the device is a modem, then check the modem
+				** carrier.
+				*/
+				if(!(ttyP->t_cflag & CLOCAL) && 
+					((PortP->State & (RIO_MOPEN|RIO_WOPEN))))
+				{
+			/*
+			** Is there a carrier?
+			*/
+			if ( PortP->ModemState & MSVR1_CD )
+			{
+			/*
+			** Has carrier just appeared?
+			*/
+			if (!(ttyP->t_state & CARR_ON))
+			{
+				rio_dprint(RIO_DEBUG_CMD, PortP,DBG_MODEM,"Carrier just came up.\n");
+				ttyP->t_state |=CARR_ON;
+				/*
+				** wakeup anyone in WOPEN
+				*/
+				if ( ttyP->t_state & (ISOPEN|WOPEN) )
+				wakeup((caddr_t)&ttyP->t_canq);
+#ifdef STATS
+				PortP->Stat.ModemOnCnt++;
+#endif
+			}
+			}
+			else
+			{
+			/*
+			** Has carrier just dropped?
+			*/
+			if (ttyP->t_state & CARR_ON)
+			{
+				/*
+				** send SIGHUP to the process group
+				*/
+				if ( ttyP->t_state & (ISOPEN|WOPEN) )
+				{
+				signal(ttyP->t_pgrp,SIGHUP);
+				ttyflush(ttyP,(FREAD|FWRITE));
+				}
+				ttyP->t_state &= ~CARR_ON;
+				wakeup( (caddr_t)&PortP->TxBufferOut );
+				wakeup( (caddr_t)&PortP->TxBufferIn );
+				rio_dprint(RIO_DEBUG_CMD, PortP,DBG_MODEM,"Carrier just went down.\n");
+#ifdef STATS
+				PortP->Stat.ModemOffCnt++;
+#endif
+			}
+			}
+		}
+		}
+#endif
+			}
+			break;
+
+		default:
+			rio_dprint(RIO_DEBUG_CMD, ("Unknown command %d on CMD_RUP of host %d\n",
+				RBYTE(PktCmdP->Command),HostP-p->RIOHosts));
+			break;
+	}
+	rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+	return TRUE;
+}
+/*
+** The command mechanism:
+**	Each rup has a chain of commands associated with it.
+**	This chain is maintained by routines in this file.
+**	Periodically we are called and we run a quick check of all the
+**	active chains to determine if there is a command to be executed,
+**	and if the rup is ready to accept it.
+**
+*/
+
+/*
+** Allocate an empty command block.
+*/
+struct CmdBlk *
+RIOGetCmdBlk()
+{
+	struct CmdBlk *CmdBlkP;
+
+	CmdBlkP = (struct CmdBlk *)sysbrk(sizeof(struct CmdBlk));
+	bzero(CmdBlkP, sizeof(struct CmdBlk));
+
+	return CmdBlkP;
+}
+
+/*
+** Return a block to the head of the free list.
+*/
+void
+RIOFreeCmdBlk(CmdBlkP)
+struct CmdBlk *CmdBlkP;
+{
+	sysfree((void *)CmdBlkP, sizeof(struct CmdBlk));
+}
+
+/*
+** attach a command block to the list of commands to be performed for
+** a given rup.
+*/
+int
+RIOQueueCmdBlk(HostP, Rup, CmdBlkP)
+struct Host *HostP;
+uint Rup;
+struct CmdBlk *CmdBlkP;
+{
+	struct CmdBlk **Base;
+	struct UnixRup *UnixRupP;
+	unsigned long flags;
+
+#ifdef CHECK
+	CheckHostP( HostP );
+	CheckRup( Rup );
+	CheckCmdBlkP( CmdBlkP );
+#endif
+
+	rio_dprint(RIO_DEBUG_CMD, ("RIOQueueCmdBlk(Host, Rup %d, 0x%x)\n", Rup, (int)CmdBlkP ));
+
+	if ( Rup >= (ushort)(MAX_RUP+LINKS_PER_UNIT) ) {
+		rio_dprint(RIO_DEBUG_CMD, ("Illegal rup number %d in RIOQueueCmdBlk\n",Rup));
+		RIOFreeCmdBlk( CmdBlkP );
+		return RIO_FAIL;
+	}
+
+	UnixRupP = &HostP->UnixRups[Rup];
+
+	rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
+
+	/*
+	** If the RUP is currently inactive, then put the request
+	** straight on the RUP....
+	*/
+	if ( (UnixRupP->CmdsWaitingP == NULL) && (UnixRupP->CmdPendingP == NULL) && 
+		(RWORD(UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE) &&
+		(CmdBlkP->PreFuncP ? (*CmdBlkP->PreFuncP)(CmdBlkP->PreArg,CmdBlkP)
+							:TRUE)) {
+		rio_dprint(RIO_DEBUG_CMD, ("RUP inactive-placing command straight on. Cmd byte is 0x%x\n",
+					CmdBlkP->Packet.data[0]));
+
+		/*
+		** Whammy! blat that pack!
+		*/
+		HostP->Copy( (caddr_t)&CmdBlkP->Packet, 
+			RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt ), sizeof(PKT) );
+
+		/*
+		** place command packet on the pending position.
+		*/
+		UnixRupP->CmdPendingP = CmdBlkP;
+
+		/*
+		** set the command register
+		*/
+		WWORD(UnixRupP->RupP->txcontrol , TX_PACKET_READY);
+
+		rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
+
+		return RIO_SUCCESS;
+	}
+
+	rio_dprint(RIO_DEBUG_CMD, ("RUP active - en-queing\n"));
+
+	if ( UnixRupP->CmdsWaitingP != NULL)
+		rio_dprint(RIO_DEBUG_CMD, ("Rup active - command waiting\n"));
+	if ( UnixRupP->CmdPendingP != NULL )
+		rio_dprint(RIO_DEBUG_CMD, ("Rup active - command pending\n"));
+	if ( RWORD(UnixRupP->RupP->txcontrol) != TX_RUP_INACTIVE )
+		rio_dprint(RIO_DEBUG_CMD, ("Rup active - command rup not ready\n"));
+
+	Base = &UnixRupP->CmdsWaitingP;
+
+	rio_dprint(RIO_DEBUG_CMD, ("First try to queue cmdblk 0x%x at 0x%x\n",(int)CmdBlkP,(int)Base));
+
+	while ( *Base ) {
+		rio_dprint(RIO_DEBUG_CMD, ("Command cmdblk 0x%x here\n",(int)(*Base)));
+		Base = &((*Base)->NextP);
+		rio_dprint(RIO_DEBUG_CMD, ("Now try to queue cmd cmdblk 0x%x at 0x%x\n",
+		       (int)CmdBlkP,(int)Base));
+	}
+
+	rio_dprint(RIO_DEBUG_CMD, ("Will queue cmdblk 0x%x at 0x%x\n",(int)CmdBlkP,(int)Base));
+
+	*Base = CmdBlkP;
+
+	CmdBlkP->NextP = NULL;
+
+	rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
+
+	return RIO_SUCCESS;
+}
+
+/*
+** Here we go - if there is an empty rup, fill it!
+** must be called at splrio() or higher.
+*/
+void
+RIOPollHostCommands(p, HostP)
+struct rio_info *	p;
+struct Host *		HostP;
+{
+	register struct CmdBlk *CmdBlkP;
+	register struct UnixRup *UnixRupP;
+	struct PKT *PacketP;
+	ushort Rup;
+	unsigned long flags;
+
+
+	Rup = MAX_RUP+LINKS_PER_UNIT;
+
+	do {	/* do this loop for each RUP */
+		/*
+		** locate the rup we are processing & lock it
+		*/
+		UnixRupP = &HostP->UnixRups[--Rup];
+
+		spin_lock_irqsave(&UnixRupP->RupLock, flags);
+
+		/*
+		** First check for incoming commands:
+		*/
+		if ( RWORD(UnixRupP->RupP->rxcontrol) != RX_RUP_INACTIVE ) {
+			int FreeMe;
+
+			/* rio_dprint(RIO_DEBUG_CMD, ("RIORupCmd( %d, %d )\n", HostP-p->RIOHosts, Rup )); */
+
+			PacketP =(PKT *)RIO_PTR(HostP->Caddr,RWORD(UnixRupP->RupP->rxpkt));
+
+			ShowPacket( DBG_CMD, PacketP );
+
+			switch ( RBYTE(PacketP->dest_port) ) {
+				case BOOT_RUP:
+					rio_dprint(RIO_DEBUG_CMD, ("Incoming Boot %s packet '%x'\n", 
+						RBYTE(PacketP->len) & 0x80 ? "Command":"Data", 
+						RBYTE(PacketP->data[0]) )); 
+					rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
+					FreeMe= RIOBootRup(p, Rup,HostP,PacketP);
+					rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
+					break;
+
+				case COMMAND_RUP:
+					/*
+					** Free the RUP lock as loss of carrier causes a
+					** ttyflush which will (eventually) call another
+					** routine that uses the RUP lock.
+					*/
+					rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
+					FreeMe= RIOCommandRup(p, Rup,HostP,PacketP);
+					if (PacketP->data[5] == MEMDUMP) {
+						rio_dprint(RIO_DEBUG_CMD, ("Memdump from 0x%x complete\n",
+			 				*(ushort *) &(PacketP->data[6])));
+						HostP->Copy( (caddr_t)&(PacketP->data[8]), 
+								(caddr_t)p->RIOMemDump, 32 );
+					}
+					rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
+					break;
+
+				case ROUTE_RUP:
+					rio_spin_unlock_irqrestore( &UnixRupP->RupLock, flags);
+					FreeMe = RIORouteRup(p, Rup, HostP, PacketP );
+					rio_spin_lock_irqsave( &UnixRupP->RupLock, flags );
+					break;
+
+				default:
+					rio_dprint(RIO_DEBUG_CMD, ("Unknown RUP %d\n", RBYTE(PacketP->dest_port)));
+					FreeMe = 1;
+					break;
+			}
+
+			if ( FreeMe ) {
+				rio_dprint(RIO_DEBUG_CMD, ("Free processed incoming command packet\n"));
+				put_free_end(HostP,PacketP);
+
+				WWORD(UnixRupP->RupP->rxcontrol , RX_RUP_INACTIVE);
+
+				if ( RWORD(UnixRupP->RupP->handshake)==PHB_HANDSHAKE_SET ) {
+					rio_dprint(RIO_DEBUG_CMD, ("Handshake rup %d\n",Rup));
+					WWORD(UnixRupP->RupP->handshake,
+						PHB_HANDSHAKE_SET|PHB_HANDSHAKE_RESET);
+				}
+			}
+		}
+
+		/*
+		** IF a command was running on the port, 
+		** and it has completed, then tidy it up.
+		*/
+		if ( (CmdBlkP = UnixRupP->CmdPendingP) && /* ASSIGN! */
+			(RWORD(UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE) ) {
+			/*
+			** we are idle.
+			** there is a command in pending.
+			** Therefore, this command has finished.
+			** So, wakeup whoever is waiting for it (and tell them
+			** what happened).
+			*/
+			if ( CmdBlkP->Packet.dest_port == BOOT_RUP )
+				rio_dprint(RIO_DEBUG_CMD, ("Free Boot %s Command Block '%x'\n", 
+						CmdBlkP->Packet.len & 0x80 ? "Command":"Data", 
+							CmdBlkP->Packet.data[0] ));
+
+			rio_dprint(RIO_DEBUG_CMD, ("Command 0x%x completed\n",(int)CmdBlkP));
+
+			/*
+			** Clear the Rup lock to prevent mutual exclusion.
+			*/
+			if ( CmdBlkP->PostFuncP ) {
+				rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
+				(*CmdBlkP->PostFuncP) (CmdBlkP->PostArg,CmdBlkP);
+				rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
+			}
+
+			/*
+			** ....clear the pending flag....
+			*/
+			UnixRupP->CmdPendingP = NULL;
+
+			/*
+			** ....and return the command block to the freelist.
+			*/
+			RIOFreeCmdBlk( CmdBlkP );
+		}
+
+		/*
+		** If there is a command for this rup, and the rup
+		** is idle, then process the command
+		*/
+		if ( (CmdBlkP = UnixRupP->CmdsWaitingP) && /* ASSIGN! */
+			(UnixRupP->CmdPendingP == NULL) &&
+				(RWORD(UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE) ) {
+			/*
+			** if the pre-function is non-zero, call it.
+			** If it returns RIO_FAIL then don't
+			** send this command yet!
+			*/
+#ifdef CHECK
+CheckCmdBlkP( CmdBlkP );
+#endif
+			if ( !(CmdBlkP->PreFuncP ?
+				(*CmdBlkP->PreFuncP)(CmdBlkP->PreArg, CmdBlkP) : TRUE)) {
+				rio_dprint(RIO_DEBUG_CMD, ("Not ready to start command 0x%x\n",(int)CmdBlkP));
+			}
+			else {
+				rio_dprint(RIO_DEBUG_CMD, ("Start new command 0x%x Cmd byte is 0x%x\n",
+						(int)CmdBlkP, CmdBlkP->Packet.data[0]));
+				/*
+				** Whammy! blat that pack!
+				*/
+#ifdef CHECK
+CheckPacketP( (PKT *)RIO_PTR(HostP->Caddr,UnixRupP->RupP->txpkt) );
+#endif
+				HostP->Copy( (caddr_t)&CmdBlkP->Packet, 
+					RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt), sizeof(PKT));
+
+				/*
+				** remove the command from the rup command queue...
+				*/
+				UnixRupP->CmdsWaitingP = CmdBlkP->NextP;
+
+				/*
+				** ...and place it on the pending position.
+				*/
+				UnixRupP->CmdPendingP = CmdBlkP;
+
+				/*
+				** set the command register
+				*/
+				WWORD(UnixRupP->RupP->txcontrol,TX_PACKET_READY);
+
+				/*
+				** the command block will be freed
+				** when the command has been processed.
+				*/
+			}
+		}
+		spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
+	} while ( Rup );
+}
+
+
+/*
+** Return the length of the named string
+*/
+int
+RIOStrlen(Str)
+register char *Str;
+{
+	register int len = 0;
+
+	while ( *Str++ )
+		len++;
+	return len;
+}
+
+/*
+** compares s1 to s2 and return 0 if they match.
+*/
+int
+RIOStrCmp(s1, s2)
+register char *s1;
+register char *s2;
+{
+	while ( *s1 && *s2 && *s1==*s2 )
+		s1++, s2++;
+	return *s1-*s2;
+}
+
+/*
+** compares s1 to s2 for upto n bytes and return 0 if they match.
+*/
+int
+RIOStrnCmp(s1, s2, n)
+register char *s1;
+register char *s2;
+int n;
+{
+	while ( n && *s1 && *s2 && *s1==*s2 )
+		n--, s1++, s2++;
+	return n ? *s1!=*s2 : 0;
+}
+
+/*
+** copy up to 'len' bytes from 'from' to 'to'.
+*/
+void
+RIOStrNCpy(to, from, len)
+char *to;
+char *from;
+int len; 
+{
+	while ( len-- && (*to++ = *from++) )
+		;
+	to[-1]='\0';
+}
+
+int
+RIOWFlushMark(iPortP, CmdBlkP)
+int iPortP;
+struct CmdBlk *CmdBlkP;
+{
+	struct Port *	PortP = (struct Port *)iPortP;
+	unsigned long flags;
+
+	rio_spin_lock_irqsave(&PortP->portSem, flags);
+#ifdef CHECK
+	CheckPortP( PortP );
+#endif
+	PortP->WflushFlag++;
+	PortP->MagicFlags |= MAGIC_FLUSH;
+	rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+	return RIOUnUse( iPortP, CmdBlkP );
+}
+
+int
+RIORFlushEnable(iPortP, CmdBlkP)
+int iPortP;
+struct CmdBlk *CmdBlkP; 
+{
+	struct Port *	PortP = (struct Port *)iPortP;
+	PKT *PacketP;
+	unsigned long flags;
+
+	rio_spin_lock_irqsave(&PortP->portSem, flags);
+
+	while ( can_remove_receive(&PacketP, PortP) ) {
+		remove_receive(PortP);
+		ShowPacket(DBG_PROC, PacketP );
+		put_free_end( PortP->HostP, PacketP );
+	}
+
+	if ( RWORD(PortP->PhbP->handshake)==PHB_HANDSHAKE_SET ) {
+		/*
+		** MAGIC! (Basically, handshake the RX buffer, so that
+		** the RTAs upstream can be re-enabled.)
+		*/
+		rio_dprint(RIO_DEBUG_CMD, ("Util: Set RX handshake bit\n"));
+		WWORD(PortP->PhbP->handshake, PHB_HANDSHAKE_SET|PHB_HANDSHAKE_RESET);
+	}
+	rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+	return RIOUnUse( iPortP, CmdBlkP );
+}
+
+int
+RIOUnUse(iPortP, CmdBlkP)
+int iPortP;
+struct CmdBlk *CmdBlkP; 
+{
+	struct Port *	PortP = (struct Port *)iPortP;
+	unsigned long flags;
+
+	rio_spin_lock_irqsave(&PortP->portSem, flags);
+
+#ifdef CHECK
+	CheckPortP( PortP );
+#endif
+	rio_dprint(RIO_DEBUG_CMD, ("Decrement in use count for port\n"));
+
+	if (PortP->InUse) {
+		if ( --PortP->InUse != NOT_INUSE ) {
+			rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+			return 0;
+		}
+	}
+	/*
+	** While PortP->InUse is set (i.e. a preemptive command has been sent to
+	** the RTA and is awaiting completion), any transmit data is prevented from
+	** being transferred from the write queue into the transmit packets
+	** (add_transmit) and no furthur transmit interrupt will be sent for that
+	** data. The next interrupt will occur up to 500ms later (RIOIntr is called
+	** twice a second as a saftey measure). This was the case when kermit was
+	** used to send data into a RIO port. After each packet was sent, TCFLSH
+	** was called to flush the read queue preemptively. PortP->InUse was
+	** incremented, thereby blocking the 6 byte acknowledgement packet
+	** transmitted back. This acknowledgment hung around for 500ms before
+	** being sent, thus reducing input performance substantially!.
+	** When PortP->InUse becomes NOT_INUSE, we must ensure that any data
+	** hanging around in the transmit buffer is sent immediately.
+	*/
+	WWORD(PortP->HostP->ParmMapP->tx_intr, 1);
+	/* What to do here ..
+	wakeup( (caddr_t)&(PortP->InUse) );
+	*/
+	rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+	return 0;
+}
+
+void
+ShowPacket(Flags, PacketP)
+uint Flags;
+struct PKT *PacketP; 
+{
+}
+
+/*
+** 
+** How to use this file:
+** 
+** To send a command down a rup, you need to allocate a command block, fill
+** in the packet information, fill in the command number, fill in the pre-
+** and post- functions and arguments, and then add the command block to the
+** queue of command blocks for the port in question. When the port is idle,
+** then the pre-function will be called. If this returns RIO_FAIL then the
+** command will be re-queued and tried again at a later date (probably in one
+** clock tick). If the pre-function returns NOT RIO_FAIL, then the command
+** packet will be queued on the RUP, and the txcontrol field set to the
+** command number. When the txcontrol field has changed from being the
+** command number, then the post-function will be called, with the argument
+** specified earlier, a pointer to the command block, and the value of
+** txcontrol.
+** 
+** To allocate a command block, call RIOGetCmdBlk(). This returns a pointer
+** to the command block structure allocated, or NULL if there aren't any.
+** The block will have been zeroed for you.
+** 
+** The structure has the following fields:
+** 
+** struct CmdBlk
+** {
+**	 struct CmdBlk *NextP;		  ** Pointer to next command block   **
+**	 struct PKT	 Packet;		** A packet, to copy to the rup	**
+**			int	 (*PreFuncP)();  ** The func to call to check if OK **
+**			int	 PreArg;		** The arg for the func			**
+**			int	 (*PostFuncP)(); ** The func to call when completed **
+**			int	 PostArg;	   ** The arg for the func			**
+** };
+** 
+** You need to fill in ALL fields EXCEPT NextP, which is used to link the
+** blocks together either on the free list or on the Rup list.
+** 
+** Packet is an actual packet structure to be filled in with the packet
+** information associated with the command. You need to fill in everything,
+** as the command processore doesn't process the command packet in any way.
+** 
+** The PreFuncP is called before the packet is enqueued on the host rup.
+** PreFuncP is called as (*PreFuncP)(PreArg, CmdBlkP);. PreFuncP must
+** return !RIO_FAIL to have the packet queued on the rup, and RIO_FAIL
+** if the packet is NOT to be queued.
+** 
+** The PostFuncP is called when the command has completed. It is called
+** as (*PostFuncP)(PostArg, CmdBlkP, txcontrol);. PostFuncP is not expected
+** to return a value. PostFuncP does NOT need to free the command block,
+** as this happens automatically after PostFuncP returns.
+** 
+** Once the command block has been filled in, it is attached to the correct
+** queue by calling RIOQueueCmdBlk( HostP, Rup, CmdBlkP ) where HostP is
+** a pointer to the struct Host, Rup is the NUMBER of the rup (NOT a pointer
+** to it!), and CmdBlkP is the pointer to the command block allocated using
+** RIOGetCmdBlk().
+** 
+*/
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)