patch-2.3.99-pre7 linux/drivers/char/rio/rioroute.c
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- Lines: 1234
- Date:
Wed May 10 16:56:44 2000
- Orig file:
v2.3.99-pre6/linux/drivers/char/rio/rioroute.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.3.99-pre6/linux/drivers/char/rio/rioroute.c linux/drivers/char/rio/rioroute.c
@@ -0,0 +1,1233 @@
+/*
+** -----------------------------------------------------------------------------
+**
+** Perle Specialix driver for Linux
+** Ported from existing RIO Driver for SCO sources.
+ *
+ * (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 : rioroute.c
+** SID : 1.3
+** Last Modified : 11/6/98 10:33:46
+** Retrieved : 11/6/98 10:33:50
+**
+** ident @(#)rioroute.c 1.3
+**
+** -----------------------------------------------------------------------------
+*/
+#ifdef SCCS_LABELS
+static char *_rioroute_c_sccs_ = "@(#)rioroute.c 1.3";
+#endif
+
+#define __NO_VERSION__
+#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/uaccess.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"
+#include "rioioctl.h"
+#include "param.h"
+#include "list.h"
+#include "sam.h"
+
+/*
+** Incoming on the ROUTE_RUP
+** I wrote this while I was tired. Forgive me.
+*/
+int RIORouteRup( struct rio_info *p, uint Rup, struct Host *HostP, PKT *PacketP )
+{
+ struct PktCmd *PktCmdP = (struct PktCmd *)PacketP->data;
+ struct PktCmd_M *PktReplyP;
+ struct CmdBlk *CmdBlkP;
+ struct Port *PortP;
+ struct Map *MapP;
+ struct Top *TopP;
+ int ThisLink, ThisLinkMin, ThisLinkMax;
+ int port;
+ int Mod, Mod1, Mod2;
+ ushort RtaType;
+ uint RtaUniq;
+ uint ThisUnit, ThisUnit2; /* 2 ids to accommodate 16 port RTA */
+ uint OldUnit, NewUnit, OldLink, NewLink;
+ char *MyType, *MyName;
+ int Lies;
+ unsigned long flags;
+
+#ifdef STACK
+ RIOStackCheck("RIORouteRup");
+#endif
+#ifdef CHECK
+ CheckPacketP(PacketP);
+ CheckHostP(HostP);
+ CheckRup(Rup);
+ CheckHost(Host);
+#endif
+ /*
+ ** Is this unit telling us it's current link topology?
+ */
+ if ( RBYTE(PktCmdP->Command) == ROUTE_TOPOLOGY )
+ {
+ MapP = HostP->Mapping;
+
+ /*
+ ** The packet can be sent either by the host or by an RTA.
+ ** If it comes from the host, then we need to fill in the
+ ** Topology array in the host structure. If it came in
+ ** from an RTA then we need to fill in the Mapping structure's
+ ** Topology array for the unit.
+ */
+ if ( Rup >= (ushort)MAX_RUP )
+ {
+ ThisUnit = HOST_ID;
+ TopP = HostP->Topology;
+ MyType = "Host";
+ MyName = HostP->Name;
+ ThisLinkMin = ThisLinkMax = Rup - MAX_RUP;
+ }
+ else
+ {
+ ThisUnit = Rup+1;
+ TopP = HostP->Mapping[Rup].Topology;
+ MyType = "RTA";
+ MyName = HostP->Mapping[Rup].Name;
+ ThisLinkMin = 0;
+ ThisLinkMax = LINKS_PER_UNIT - 1;
+ }
+
+ /*
+ ** Lies will not be tolerated.
+ ** If any pair of links claim to be connected to the same
+ ** place, then ignore this packet completely.
+ */
+ Lies = 0;
+ for ( ThisLink=ThisLinkMin + 1; ThisLink <= ThisLinkMax; ThisLink++)
+ {
+ /*
+ ** it won't lie about network interconnect, total disconnects
+ ** and no-IDs. (or at least, it doesn't *matter* if it does)
+ */
+ if ( RBYTE(PktCmdP->RouteTopology[ThisLink].Unit) > (ushort)MAX_RUP )
+ continue;
+
+ for ( NewLink=ThisLinkMin; NewLink < ThisLink; NewLink++ )
+ {
+ if ( (RBYTE(PktCmdP->RouteTopology[ThisLink].Unit) ==
+ RBYTE(PktCmdP->RouteTopology[NewLink].Unit)) &&
+ (RBYTE(PktCmdP->RouteTopology[ThisLink].Link) ==
+ RBYTE(PktCmdP->RouteTopology[NewLink].Link)) )
+ {
+ Lies++;
+ }
+ }
+ }
+
+ if ( Lies )
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, ("LIES! DAMN LIES! %d LIES!\n",Lies));
+ rio_dprint(RIO_DEBUG_ROUTE, ("%d:%c %d:%c %d:%c %d:%c\n",
+ RBYTE(PktCmdP->RouteTopology[0].Unit),
+ 'A'+RBYTE(PktCmdP->RouteTopology[0].Link),
+ RBYTE(PktCmdP->RouteTopology[1].Unit),
+ 'A'+RBYTE(PktCmdP->RouteTopology[1].Link),
+ RBYTE(PktCmdP->RouteTopology[2].Unit),
+ 'A'+RBYTE(PktCmdP->RouteTopology[2].Link),
+ RBYTE(PktCmdP->RouteTopology[3].Unit),
+ 'A'+RBYTE(PktCmdP->RouteTopology[3].Link)));
+ return TRUE;
+ }
+
+ /*
+ ** now, process each link.
+ */
+ for ( ThisLink=ThisLinkMin; ThisLink <= ThisLinkMax; ThisLink++)
+ {
+ /*
+ ** this is what it was connected to
+ */
+ OldUnit = TopP[ThisLink].Unit;
+ OldLink = TopP[ThisLink].Link;
+
+ /*
+ ** this is what it is now connected to
+ */
+ NewUnit = RBYTE(PktCmdP->RouteTopology[ThisLink].Unit);
+ NewLink = RBYTE(PktCmdP->RouteTopology[ThisLink].Link);
+
+ if ( OldUnit != NewUnit || OldLink != NewLink )
+ {
+ /*
+ ** something has changed!
+ */
+
+ if ( NewUnit > MAX_RUP &&
+ NewUnit != ROUTE_DISCONNECT &&
+ NewUnit != ROUTE_NO_ID &&
+ NewUnit != ROUTE_INTERCONNECT )
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, ("I have a link from %s %s to unit %d:%d - I don't like it.\n",
+ MyType,
+ MyName,
+ NewUnit,
+ NewLink));
+ }
+ else
+ {
+ /*
+ ** put the new values in
+ */
+ TopP[ThisLink].Unit = NewUnit;
+ TopP[ThisLink].Link = NewLink;
+
+ RIOSetChange(p);
+
+ if ( OldUnit <= MAX_RUP )
+ {
+ /*
+ ** If something has become bust, then re-enable them messages
+ */
+ if (! p->RIONoMessage)
+ RIOConCon(p,HostP,ThisUnit,ThisLink,OldUnit,OldLink,DISCONNECT);
+ }
+
+ if ( ( NewUnit <= MAX_RUP ) && !p->RIONoMessage )
+ RIOConCon(p,HostP,ThisUnit,ThisLink,NewUnit,NewLink,CONNECT);
+
+ if ( NewUnit == ROUTE_NO_ID )
+ rio_dprint(RIO_DEBUG_ROUTE, ("%s %s (%c) is connected to an unconfigured unit.\n",
+ MyType,MyName,'A'+ThisLink));
+
+ if ( NewUnit == ROUTE_INTERCONNECT )
+ {
+ if (! p->RIONoMessage)
+ cprintf("%s '%s' (%c) is connected to another network.\n", MyType,MyName,'A'+ThisLink);
+ }
+
+ /*
+ ** perform an update for 'the other end', so that these messages
+ ** only appears once. Only disconnect the other end if it is pointing
+ ** at us!
+ */
+ if ( OldUnit == HOST_ID )
+ {
+ if ( HostP->Topology[OldLink].Unit == ThisUnit &&
+ HostP->Topology[OldLink].Link == ThisLink )
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, ("SETTING HOST (%c) TO DISCONNECTED!\n", OldLink+'A'));
+ HostP->Topology[OldLink].Unit = ROUTE_DISCONNECT;
+ HostP->Topology[OldLink].Link = NO_LINK;
+ }
+ else
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, ("HOST(%c) WAS NOT CONNECTED TO %s (%c)!\n",
+ OldLink+'A',HostP->Mapping[ThisUnit-1].Name,ThisLink+'A'));
+ }
+ }
+ else if ( OldUnit <= MAX_RUP )
+ {
+ if ( HostP->Mapping[OldUnit-1].Topology[OldLink].Unit == ThisUnit &&
+ HostP->Mapping[OldUnit-1].Topology[OldLink].Link == ThisLink )
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, ("SETTING RTA %s (%c) TO DISCONNECTED!\n",
+ HostP->Mapping[OldUnit-1].Name,OldLink+'A'));
+ HostP->Mapping[OldUnit-1].Topology[OldLink].Unit=ROUTE_DISCONNECT;
+ HostP->Mapping[OldUnit-1].Topology[OldLink].Link=NO_LINK;
+ }
+ else
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, ("RTA %s (%c) WAS NOT CONNECTED TO %s (%c)\n",
+ HostP->Mapping[OldUnit-1].Name,OldLink+'A',
+ HostP->Mapping[ThisUnit-1].Name,ThisLink+'A'));
+ }
+ }
+ if ( NewUnit == HOST_ID )
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, ("MARKING HOST (%c) CONNECTED TO %s (%c)\n",
+ NewLink+'A',MyName,ThisLink+'A'));
+ HostP->Topology[NewLink].Unit = ThisUnit;
+ HostP->Topology[NewLink].Link = ThisLink;
+ }
+ else if ( NewUnit <= MAX_RUP )
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, ("MARKING RTA %s (%c) CONNECTED TO %s (%c)\n",
+ HostP->Mapping[NewUnit-1].Name,NewLink+'A',MyName,ThisLink+'A'));
+ HostP->Mapping[NewUnit-1].Topology[NewLink].Unit=ThisUnit;
+ HostP->Mapping[NewUnit-1].Topology[NewLink].Link=ThisLink;
+ }
+ }
+ RIOSetChange(p);
+ RIOCheckIsolated(p, HostP, OldUnit );
+ }
+ }
+ return TRUE;
+ }
+
+ /*
+ ** The only other command we recognise is a route_request command
+ */
+ if ( RBYTE(PktCmdP->Command) != ROUTE_REQUEST )
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, ("Unknown command %d received on rup %d host %d ROUTE_RUP\n",
+ RBYTE(PktCmdP->Command),Rup,(int)HostP));
+ return TRUE;
+ }
+
+ RtaUniq = (RBYTE(PktCmdP->UniqNum[0])) +
+ (RBYTE(PktCmdP->UniqNum[1]) << 8) +
+ (RBYTE(PktCmdP->UniqNum[2]) << 16) +
+ (RBYTE(PktCmdP->UniqNum[3]) << 24);
+
+ /*
+ ** Determine if 8 or 16 port RTA
+ */
+ RtaType = GetUnitType(RtaUniq);
+
+ rio_dprint(RIO_DEBUG_ROUTE, ("Received a request for an ID for serial number %x\n", RtaUniq));
+
+ Mod = RBYTE(PktCmdP->ModuleTypes);
+ Mod1 = LONYBLE(Mod);
+ if (RtaType == TYPE_RTA16)
+ {
+ /*
+ ** Only one ident is set for a 16 port RTA. To make compatible
+ ** with 8 port, set 2nd ident in Mod2 to the same as Mod1.
+ */
+ Mod2 = Mod1;
+ rio_dprint(RIO_DEBUG_ROUTE, ("Backplane type is %s (all ports)\n",
+ p->RIOModuleTypes[Mod1].Name ));
+ }
+ else
+ {
+ Mod2 = HINYBLE(Mod);
+ rio_dprint(RIO_DEBUG_ROUTE, ("Module types are %s (ports 0-3) and %s (ports 4-7)\n",
+ p->RIOModuleTypes[Mod1].Name, p->RIOModuleTypes[Mod2].Name ));
+ }
+
+ if ( RtaUniq == 0xffffffff )
+ {
+ ShowPacket( DBG_SPECIAL, PacketP );
+ }
+
+ /*
+ ** try to unhook a command block from the command free list.
+ */
+ if ( !(CmdBlkP = RIOGetCmdBlk()) )
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, ("No command blocks to route RTA! come back later.\n"));
+ return 0;
+ }
+
+ /*
+ ** Fill in the default info on the command block
+ */
+ CmdBlkP->Packet.dest_unit = Rup;
+ CmdBlkP->Packet.dest_port = ROUTE_RUP;
+ CmdBlkP->Packet.src_unit = HOST_ID;
+ CmdBlkP->Packet.src_port = ROUTE_RUP;
+ CmdBlkP->Packet.len = PKT_CMD_BIT | 1;
+ CmdBlkP->PreFuncP = CmdBlkP->PostFuncP = NULL;
+ PktReplyP = (struct PktCmd_M *)CmdBlkP->Packet.data;
+
+ if (! RIOBootOk(p, HostP, RtaUniq))
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, ("RTA %x tried to get an ID, but does not belong - FOAD it!\n",
+ RtaUniq));
+ PktReplyP->Command = ROUTE_FOAD;
+ HostP->Copy("RT_FOAD", PktReplyP->CommandText, 7);
+ RIOQueueCmdBlk(HostP, Rup, CmdBlkP);
+ return TRUE;
+ }
+
+ /*
+ ** Check to see if the RTA is configured for this host
+ */
+ for ( ThisUnit=0; ThisUnit<MAX_RUP; ThisUnit++ )
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, ("Entry %d Flags=%s %s UniqueNum=0x%x\n",
+ ThisUnit,
+ HostP->Mapping[ThisUnit].Flags & SLOT_IN_USE ?
+ "Slot-In-Use":"Not In Use",
+ HostP->Mapping[ThisUnit].Flags & SLOT_TENTATIVE ?
+ "Slot-Tentative":"Not Tentative",
+ HostP->Mapping[ThisUnit].RtaUniqueNum ));
+
+ /*
+ ** We have an entry for it.
+ */
+ if ( (HostP->Mapping[ThisUnit].Flags & (SLOT_IN_USE | SLOT_TENTATIVE)) &&
+ (HostP->Mapping[ThisUnit].RtaUniqueNum == RtaUniq) )
+ {
+ if (RtaType == TYPE_RTA16)
+ {
+ ThisUnit2 = HostP->Mapping[ThisUnit].ID2 - 1;
+ rio_dprint(RIO_DEBUG_ROUTE, ("Found unit 0x%x at slots %d+%d\n",
+ RtaUniq,ThisUnit,ThisUnit2));
+ }
+ else
+ rio_dprint(RIO_DEBUG_ROUTE, ("Found unit 0x%x at slot %d\n",
+ RtaUniq,ThisUnit));
+ /*
+ ** If we have no knowledge of booting it, then the host has
+ ** been re-booted, and so we must kill the RTA, so that it
+ ** will be booted again (potentially with new bins)
+ ** and it will then re-ask for an ID, which we will service.
+ */
+ if ( (HostP->Mapping[ThisUnit].Flags & SLOT_IN_USE) &&
+ !(HostP->Mapping[ThisUnit].Flags & RTA_BOOTED) )
+ {
+ if ( !(HostP->Mapping[ThisUnit].Flags & MSG_DONE) )
+ {
+ if ( !p->RIONoMessage )
+ cprintf("RTA '%s' is being updated.\n",HostP->Mapping[ThisUnit].Name);
+ HostP->Mapping[ThisUnit].Flags |= MSG_DONE;
+ }
+ PktReplyP->Command = ROUTE_FOAD;
+ HostP->Copy("RT_FOAD",PktReplyP->CommandText,7);
+ RIOQueueCmdBlk(HostP, Rup, CmdBlkP);
+ return TRUE;
+ }
+
+ /*
+ ** Send the ID (entry) to this RTA. The ID number is implicit as
+ ** the offset into the table. It is worth noting at this stage
+ ** that offset zero in the table contains the entries for the
+ ** RTA with ID 1!!!!
+ */
+ PktReplyP->Command = ROUTE_ALLOCATE;
+ PktReplyP->IDNum = ThisUnit+1;
+ if (RtaType == TYPE_RTA16)
+ {
+ if (HostP->Mapping[ThisUnit].Flags & SLOT_IN_USE)
+ /*
+ ** Adjust the phb and tx pkt dest_units for 2nd block of 8
+ ** only if the RTA has ports associated (SLOT_IN_USE)
+ */
+ RIOFixPhbs(p, HostP, ThisUnit2);
+ PktReplyP->IDNum2 = ThisUnit2+1;
+ rio_dprint(RIO_DEBUG_ROUTE, ("RTA '%s' has been allocated IDs %d+%d\n",
+ HostP->Mapping[ThisUnit].Name, PktReplyP->IDNum, PktReplyP->IDNum2));
+ }
+ else
+ {
+ PktReplyP->IDNum2 = ROUTE_NO_ID;
+ rio_dprint(RIO_DEBUG_ROUTE, ("RTA '%s' has been allocated ID %d\n",
+ HostP->Mapping[ThisUnit].Name,PktReplyP->IDNum));
+ }
+ HostP->Copy("RT_ALLOCAT",PktReplyP->CommandText,10);
+
+ RIOQueueCmdBlk( HostP, Rup, CmdBlkP);
+
+ /*
+ ** If this is a freshly booted RTA, then we need to re-open
+ ** the ports, if any where open, so that data may once more
+ ** flow around the system!
+ */
+ if ( (HostP->Mapping[ThisUnit].Flags & RTA_NEWBOOT) &&
+ (HostP->Mapping[ThisUnit].SysPort != NO_PORT) )
+ {
+ /*
+ ** look at the ports associated with this beast and
+ ** see if any where open. If they was, then re-open
+ ** them, using the info from the tty flags.
+ */
+ for ( port=0; port<PORTS_PER_RTA; port++ )
+ {
+ PortP = p->RIOPortp[port+HostP->Mapping[ThisUnit].SysPort];
+ if ( PortP->State & (RIO_MOPEN|RIO_LOPEN) )
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, ("Re-opened this port\n"));
+ rio_spin_lock_irqsave(&PortP->portSem, flags);
+ PortP->MagicFlags |= MAGIC_REBOOT;
+ rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+ }
+ }
+ if (RtaType == TYPE_RTA16)
+ {
+ for ( port=0; port<PORTS_PER_RTA; port++ )
+ {
+ PortP = p->RIOPortp[port+HostP->Mapping[ThisUnit2].SysPort];
+ if ( PortP->State & (RIO_MOPEN|RIO_LOPEN) )
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, ("Re-opened this port\n"));
+ rio_spin_lock_irqsave(&PortP->portSem, flags);
+ PortP->MagicFlags |= MAGIC_REBOOT;
+ rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+ }
+ }
+ }
+ }
+
+ /*
+ ** keep a copy of the module types!
+ */
+ HostP->UnixRups[ThisUnit].ModTypes = Mod;
+ if (RtaType == TYPE_RTA16)
+ HostP->UnixRups[ThisUnit2].ModTypes = Mod;
+
+ /*
+ ** If either of the modules on this unit is read-only or write-only
+ ** or none-xprint, then we need to transfer that info over to the
+ ** relevent ports.
+ */
+ if ( HostP->Mapping[ThisUnit].SysPort != NO_PORT )
+ {
+ for ( port=0; port<PORTS_PER_MODULE; port++ )
+ {
+ p->RIOPortp[port+HostP->Mapping[ThisUnit].SysPort]->Config &= ~RIO_NOMASK;
+ p->RIOPortp[port+HostP->Mapping[ThisUnit].SysPort]->Config |=
+ p->RIOModuleTypes[Mod1].Flags[port];
+ p->RIOPortp[port+PORTS_PER_MODULE+HostP->Mapping[ThisUnit].SysPort]->Config &= ~RIO_NOMASK;
+ p->RIOPortp[port+PORTS_PER_MODULE+HostP->Mapping[ThisUnit].SysPort]->Config |= p->RIOModuleTypes[Mod2].Flags[port];
+ }
+ if (RtaType == TYPE_RTA16)
+ {
+ for ( port=0; port<PORTS_PER_MODULE; port++ )
+ {
+ p->RIOPortp[port+HostP->Mapping[ThisUnit2].SysPort]->Config &= ~RIO_NOMASK;
+ p->RIOPortp[port+HostP->Mapping[ThisUnit2].SysPort]->Config |= p->RIOModuleTypes[Mod1].Flags[port];
+ p->RIOPortp[port+PORTS_PER_MODULE+HostP->Mapping[ThisUnit2].SysPort]->Config &= ~RIO_NOMASK;
+ p->RIOPortp[port+PORTS_PER_MODULE+HostP->Mapping[ThisUnit2].SysPort]->Config |= p->RIOModuleTypes[Mod2].Flags[port];
+ }
+ }
+ }
+
+ /*
+ ** Job done, get on with the interrupts!
+ */
+ return TRUE;
+ }
+ }
+ /*
+ ** There is no table entry for this RTA at all.
+ **
+ ** Lets check to see if we actually booted this unit - if not,
+ ** then we reset it and it will go round the loop of being booted
+ ** we can then worry about trying to fit it into the table.
+ */
+ for ( ThisUnit=0; ThisUnit<HostP->NumExtraBooted; ThisUnit++ )
+ if ( HostP->ExtraUnits[ThisUnit] == RtaUniq )
+ break;
+ if ( ThisUnit == HostP->NumExtraBooted && ThisUnit != MAX_EXTRA_UNITS )
+ {
+ /*
+ ** if the unit wasn't in the table, and the table wasn't full, then
+ ** we reset the unit, because we didn't boot it.
+ ** However, if the table is full, it could be that we did boot
+ ** this unit, and so we won't reboot it, because it isn't really
+ ** all that disasterous to keep the old bins in most cases. This
+ ** is a rather tacky feature, but we are on the edge of reallity
+ ** here, because the implication is that someone has connected
+ ** 16+MAX_EXTRA_UNITS onto one host.
+ */
+ static int UnknownMesgDone = 0;
+
+ if ( !UnknownMesgDone )
+ {
+ if (! p->RIONoMessage)
+ cprintf("One or more unknown RTAs are being updated.\n");
+ UnknownMesgDone = 1;
+ }
+
+ PktReplyP->Command = ROUTE_FOAD;
+ HostP->Copy("RT_FOAD",PktReplyP->CommandText,7);
+ }
+ else
+ {
+ /*
+ ** we did boot it (as an extra), and there may now be a table
+ ** slot free (because of a delete), so we will try to make
+ ** a tentative entry for it, so that the configurator can see it
+ ** and fill in the details for us.
+ */
+ if (RtaType == TYPE_RTA16)
+ {
+ if (RIOFindFreeID(p, HostP, &ThisUnit, &ThisUnit2) == 0)
+ {
+ RIODefaultName(p, HostP, ThisUnit);
+ FillSlot(ThisUnit, ThisUnit2, RtaUniq, HostP);
+ }
+ }
+ else
+ {
+ if (RIOFindFreeID(p, HostP, &ThisUnit, NULL) == 0)
+ {
+ RIODefaultName(p, HostP, ThisUnit);
+ FillSlot(ThisUnit, 0, RtaUniq, HostP);
+ }
+ }
+ PktReplyP->Command = ROUTE_USED;
+ HostP->Copy("RT_USED",PktReplyP->CommandText,7);
+ }
+ RIOQueueCmdBlk( HostP, Rup, CmdBlkP);
+ return TRUE;
+}
+
+
+void
+RIOFixPhbs(p, HostP, unit)
+struct rio_info *p;
+struct Host *HostP;
+uint unit;
+{
+ ushort link, port;
+ struct Port *PortP;
+ unsigned long flags;
+ int PortN = HostP->Mapping[unit].SysPort;
+
+ rio_dprint(RIO_DEBUG_ROUTE, ("RIOFixPhbs unit %d sysport %d\n", unit, PortN));
+
+ if (PortN != -1) {
+ ushort dest_unit = HostP->Mapping[unit].ID2;
+
+ /*
+ ** Get the link number used for the 1st 8 phbs on this unit.
+ */
+ PortP = p->RIOPortp[HostP->Mapping[dest_unit - 1].SysPort];
+
+ link = RWORD(PortP->PhbP->link);
+
+ for (port = 0; port < PORTS_PER_RTA; port++, PortN++) {
+ ushort dest_port = port + 8;
+#if 0
+ uint PktInt;
+#endif
+ WORD *TxPktP;
+ PKT *Pkt;
+
+ PortP = p->RIOPortp[PortN];
+
+ rio_spin_lock_irqsave(&PortP->portSem, flags);
+ /*
+ ** If RTA is not powered on, the tx packets will be
+ ** unset, so go no further.
+ */
+ if (PortP->TxStart == 0) {
+ rio_dprint(RIO_DEBUG_ROUTE, ("Tx pkts not set up yet\n"));
+ break;
+ }
+
+ /*
+ ** For the second slot of a 16 port RTA, the driver needs to
+ ** sort out the phb to port mappings. The dest_unit for this
+ ** group of 8 phbs is set to the dest_unit of the accompanying
+ ** 8 port block. The dest_port of the second unit is set to
+ ** be in the range 8-15 (i.e. 8 is added). Thus, for a 16 port
+ ** RTA with IDs 5 and 6, traffic bound for port 6 of unit 6
+ ** (being the second map ID) will be sent to dest_unit 5, port
+ ** 14. When this RTA is deleted, dest_unit for ID 6 will be
+ ** restored, and the dest_port will be reduced by 8.
+ ** Transmit packets also have a destination field which needs
+ ** adjusting in the same manner.
+ ** Note that the unit/port bytes in 'dest' are swapped.
+ ** We also need to adjust the phb and rup link numbers for the
+ ** second block of 8 ttys.
+ */
+ for (TxPktP = PortP->TxStart; TxPktP <= PortP->TxEnd; TxPktP++) {
+ /*
+ ** *TxPktP is the pointer to the transmit packet on the host
+ ** card. This needs to be translated into a 32 bit pointer
+ ** so it can be accessed from the driver.
+ */
+ Pkt = (PKT *) RIO_PTR(HostP->Caddr,RINDW(TxPktP));
+
+ /*
+ ** If the packet is used, reset it.
+ */
+ Pkt = (PKT *)((uint)Pkt & ~PKT_IN_USE);
+ WBYTE(Pkt->dest_unit, dest_unit);
+ WBYTE(Pkt->dest_port, dest_port);
+ }
+ rio_dprint(RIO_DEBUG_ROUTE, ("phb dest: Old %x:%x New %x:%x\n",
+ RWORD(PortP->PhbP->destination) & 0xff,
+ (RWORD(PortP->PhbP->destination) >> 8) & 0xff,
+ dest_unit, dest_port));
+ WWORD(PortP->PhbP->destination, dest_unit + (dest_port << 8));
+ WWORD(PortP->PhbP->link, link);
+
+ rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+ }
+ /*
+ ** Now make sure the range of ports to be serviced includes
+ ** the 2nd 8 on this 16 port RTA.
+ */
+ if (link > 3) return;
+ if (((unit * 8) + 7) > RWORD(HostP->LinkStrP[link].last_port)) {
+ rio_dprint(RIO_DEBUG_ROUTE, ("last port on host link %d: %d\n", link, (unit * 8) + 7));
+ WWORD(HostP->LinkStrP[link].last_port, (unit * 8) + 7);
+ }
+ }
+}
+
+/*
+** Check to see if the new disconnection has isolated this unit.
+** If it has, then invalidate all its link information, and tell
+** the world about it. This is done to ensure that the configurator
+** only gets up-to-date information about what is going on.
+*/
+int
+RIOCheckIsolated(p, HostP, UnitId)
+struct rio_info * p;
+struct Host *HostP;
+uint UnitId;
+{
+ unsigned long flags;
+ rio_spin_lock_irqsave(&HostP->HostLock, flags);
+
+#ifdef CHECK
+ CheckHostP( HostP );
+ CheckUnitId( UnitId );
+#endif
+ if ( RIOCheck( HostP, UnitId ) ) {
+ rio_dprint(RIO_DEBUG_ROUTE, ("Unit %d is NOT isolated\n",UnitId));
+ rio_spin_unlock_irqrestore(&HostP->HostLock, flags);
+ return(0);
+ }
+
+ RIOIsolate(p, HostP, UnitId );
+ RIOSetChange(p);
+ rio_spin_unlock_irqrestore(&HostP->HostLock, flags);
+ return 1;
+}
+
+/*
+** Invalidate all the link interconnectivity of this unit, and of
+** all the units attached to it. This will mean that the entire
+** subnet will re-introduce itself.
+*/
+int
+RIOIsolate(p, HostP, UnitId)
+struct rio_info * p;
+struct Host * HostP;
+uint UnitId;
+{
+ uint link, unit;
+
+#ifdef CHECK
+ CheckHostP( HostP );
+ CheckUnitId( UnitId );
+#endif
+ UnitId--; /* this trick relies on the Unit Id being UNSIGNED! */
+
+ if ( UnitId > MAX_RUP ) /* dontcha just lurv unsigned maths! */
+ return(0);
+
+ if ( HostP->Mapping[UnitId].Flags & BEEN_HERE )
+ return(0);
+
+ HostP->Mapping[UnitId].Flags |= BEEN_HERE;
+
+ if ( p->RIOPrintDisabled == DO_PRINT )
+ rio_dprint(RIO_DEBUG_ROUTE, ("RIOMesgIsolated %s",HostP->Mapping[UnitId].Name));
+
+ for ( link=0; link<LINKS_PER_UNIT; link++) {
+ unit = HostP->Mapping[UnitId].Topology[link].Unit;
+ HostP->Mapping[UnitId].Topology[link].Unit = ROUTE_DISCONNECT;
+ HostP->Mapping[UnitId].Topology[link].Link = NO_LINK;
+ RIOIsolate(p, HostP, unit );
+ }
+ HostP->Mapping[UnitId].Flags &= ~BEEN_HERE;
+ return 1;
+}
+
+int
+RIOCheck(HostP, UnitId)
+struct Host *HostP;
+uint UnitId;
+{
+ unsigned char link;
+
+#ifdef CHECK
+ CheckHostP( HostP );
+ CheckUnitId( UnitId );
+#endif
+/* rio_dprint(RIO_DEBUG_ROUTE, ("Check to see if unit %d has a route to the host\n",UnitId)); */
+ rio_dprint(RIO_DEBUG_ROUTE, ("RIOCheck : UnitID = %d\n",UnitId));
+
+ if ( UnitId == HOST_ID ) {
+ /* rio_dprint(RIO_DEBUG_ROUTE, ("Unit %d is NOT isolated - it IS the host!\n", UnitId)); */
+ return 1;
+ }
+
+ UnitId--;
+
+ if ( UnitId >= MAX_RUP ) {
+ /* rio_dprint(RIO_DEBUG_ROUTE, ("Unit %d - ignored.\n", UnitId)); */
+ return 0;
+ }
+
+ for ( link=0; link<LINKS_PER_UNIT; link++ ) {
+ if ( HostP->Mapping[UnitId].Topology[link].Unit==HOST_ID ) {
+ /* rio_dprint(RIO_DEBUG_ROUTE, ("Unit %d is connected directly to host via link (%c).\n",
+ UnitId, 'A'+link)); */
+ return 1;
+ }
+ }
+
+ if ( HostP->Mapping[UnitId].Flags & BEEN_HERE ) {
+ /* rio_dprint(RIO_DEBUG_ROUTE, ("Been to Unit %d before - ignoring\n", UnitId)); */
+ return 0;
+ }
+
+ HostP->Mapping[UnitId].Flags |= BEEN_HERE;
+
+ for ( link=0; link < LINKS_PER_UNIT; link++ ) {
+ /* rio_dprint(RIO_DEBUG_ROUTE, ("Unit %d check link (%c)\n", UnitId,'A'+link)); */
+ if ( RIOCheck( HostP, HostP->Mapping[UnitId].Topology[link].Unit ) ) {
+ /* rio_dprint(RIO_DEBUG_ROUTE, ("Unit %d is connected to something that knows the host via link (%c)\n", UnitId,link+'A')); */
+ HostP->Mapping[UnitId].Flags &= ~BEEN_HERE;
+ return 1;
+ }
+ }
+
+ HostP->Mapping[UnitId].Flags &= ~BEEN_HERE;
+
+ /* rio_dprint(RIO_DEBUG_ROUTE, ("Unit %d DOESNT KNOW THE HOST!\n", UnitId)); */
+
+ return 0;
+}
+
+/*
+** Returns the type of unit (host, 16/8 port RTA)
+*/
+
+uint
+GetUnitType(Uniq)
+uint Uniq;
+{
+ switch ( (Uniq >> 28) & 0xf)
+ {
+ case RIO_AT:
+ case RIO_MCA:
+ case RIO_EISA:
+ case RIO_PCI:
+ rio_dprint(RIO_DEBUG_ROUTE, ("Unit type: Host\n"));
+ return(TYPE_HOST);
+ case RIO_RTA_16:
+ rio_dprint(RIO_DEBUG_ROUTE, ("Unit type: 16 port RTA\n"));
+ return(TYPE_RTA16);
+ case RIO_RTA:
+ rio_dprint(RIO_DEBUG_ROUTE, ("Unit type: 8 port RTA\n"));
+ return(TYPE_RTA8);
+ default :
+ rio_dprint(RIO_DEBUG_ROUTE, ("Unit type: Unrecognised\n"));
+ return(99);
+ }
+}
+
+int
+RIOSetChange(p)
+struct rio_info * p;
+{
+ if ( p->RIOQuickCheck != NOT_CHANGED )
+ return(0);
+ p->RIOQuickCheck = CHANGED;
+ if ( p->RIOSignalProcess ) {
+ rio_dprint(RIO_DEBUG_ROUTE, ("Send SIG-HUP"));
+ /*
+ psignal( RIOSignalProcess, SIGHUP );
+ */
+ }
+ return(0);
+}
+
+void
+RIOConCon(p, HostP, FromId, FromLink, ToId, ToLink, Change)
+struct rio_info * p;
+struct Host *HostP;
+uint FromId;
+uint FromLink;
+uint ToId;
+uint ToLink;
+int Change;
+{
+ char *FromName;
+ char *FromType;
+ char *ToName;
+ char *ToType;
+ unsigned int tp;
+
+/*
+** 15.10.1998 ARG - ESIL 0759
+** (Part) fix for port being trashed when opened whilst RTA "disconnected"
+**
+** What's this doing in here anyway ?
+** It was causing the port to be 'unmapped' if opened whilst RTA "disconnected"
+**
+** 09.12.1998 ARG - ESIL 0776 - part fix
+** Okay, We've found out what this was all about now !
+** Someone had botched this to use RIOHalted to indicated the number of RTAs
+** 'disconnected'. The value in RIOHalted was then being used in the
+** 'RIO_QUICK_CHECK' ioctl. A none zero value indicating that a least one RTA
+** is 'disconnected'. The change was put in to satisfy a customer's needs.
+** Having taken this bit of code out 'RIO_QUICK_CHECK' now no longer works for
+** the customer.
+**
+ if (Change == CONNECT) {
+ if (p->RIOHalted) p->RIOHalted --;
+ }
+ else {
+ p->RIOHalted ++;
+ }
+**
+** So - we need to implement it slightly differently - a new member of the
+** rio_info struct - RIORtaDisCons (RIO RTA connections) keeps track of RTA
+** connections and disconnections.
+*/
+ if (Change == CONNECT) {
+ if (p->RIORtaDisCons) p->RIORtaDisCons--;
+ }
+ else {
+ p->RIORtaDisCons++;
+ }
+
+ if ( p->RIOPrintDisabled == DONT_PRINT )
+ return;
+
+ if ( FromId > ToId ) {
+ tp = FromId;
+ FromId = ToId;
+ ToId = tp;
+ tp = FromLink;
+ FromLink = ToLink;
+ ToLink = tp;
+ }
+
+ FromName = FromId ? HostP->Mapping[FromId-1].Name : HostP->Name;
+ FromType = FromId ? "RTA" : "HOST";
+ ToName = ToId ? HostP->Mapping[ToId-1].Name : HostP->Name;
+ ToType = ToId ? "RTA" : "HOST";
+
+ rio_dprint(RIO_DEBUG_ROUTE, ("Link between %s '%s' (%c) and %s '%s' (%c) %s.\n",
+ FromType, FromName, 'A'+FromLink,
+ ToType, ToName, 'A'+ToLink,
+ (Change==CONNECT) ? "established" : "disconnected"));
+ cprintf("Link between %s '%s' (%c) and %s '%s' (%c) %s.\n",
+ FromType, FromName, 'A'+FromLink,
+ ToType, ToName, 'A'+ToLink,
+ (Change==CONNECT) ? "established" : "disconnected");
+}
+
+/*
+** RIORemoveFromSavedTable :
+**
+** Delete and RTA entry from the saved table given to us
+** by the configuration program.
+*/
+int
+RIORemoveFromSavedTable(struct rio_info *p, struct Map *pMap)
+{
+ int entry;
+
+ /*
+ ** We loop for all entries even after finding an entry and
+ ** zeroing it because we may have two entries to delete if
+ ** its a 16 port RTA.
+ */
+ for (entry = 0; entry < TOTAL_MAP_ENTRIES; entry++)
+ {
+ if (p->RIOSavedTable[entry].RtaUniqueNum == pMap->RtaUniqueNum)
+ {
+ bzero((caddr_t)&p->RIOSavedTable[entry], sizeof(struct Map));
+ }
+ }
+ return 0;
+}
+
+
+/*
+** RIOCheckDisconnected :
+**
+** Scan the unit links to and return zero if the unit is completely
+** disconnected.
+*/
+int
+RIOFreeDisconnected(struct rio_info *p, struct Host *HostP, int unit)
+{
+ int link;
+
+
+ rio_dprint(RIO_DEBUG_ROUTE, ("RIOFreeDisconnect unit %d\n",unit));
+ /*
+ ** If the slot is tentative and does not belong to the
+ ** second half of a 16 port RTA then scan to see if
+ ** is disconnected.
+ */
+ for (link = 0; link < LINKS_PER_UNIT; link++)
+ {
+ if (HostP->Mapping[unit].Topology[link].Unit != ROUTE_DISCONNECT)
+ break;
+ }
+
+ /*
+ ** If not all links are disconnected then we can forget about it.
+ */
+ if (link < LINKS_PER_UNIT)
+ return 1;
+
+#if NEED_TO_FIX_THIS
+ /* Ok so all the links are disconnected. But we may have only just
+ ** made this slot tentative and not yet received a topology update.
+ ** Lets check how long ago we made it tentative.
+ */
+ rio_dprint(RIO_DEBUG_ROUTE, ("Just about to check LBOLT on entry %d\n",unit));
+ if (drv_getparm(LBOLT, (ulong_t *) ¤t_time))
+ rio_dprint(RIO_DEBUG_ROUTE, ("drv_getparm(LBOLT,....) Failed.\n"));
+
+ elapse_time = current_time - TentTime[unit];
+ rio_dprint(RIO_DEBUG_ROUTE, ("elapse %d = current %d - tent %d (%d usec)\n",
+ elapse_time, current_time, TentTime[unit],drv_hztousec(elapse_time)));
+ if (drv_hztousec(elapse_time) < WAIT_TO_FINISH)
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, ("Skipping slot %d, not timed out yet %d\n"
+ ,unit,drv_hztousec(elapse_time)));
+ return 1;
+ }
+#endif
+
+ /*
+ ** We have found an usable slot.
+ ** If it is half of a 16 port RTA then delete the other half.
+ */
+ if (HostP->Mapping[unit].ID2 != 0)
+ {
+ int nOther = (HostP->Mapping[unit].ID2) -1;
+
+ rio_dprint(RIO_DEBUG_ROUTE, ("RioFreedis second slot %d.\n",nOther));
+ bzero((caddr_t)&HostP->Mapping[nOther], sizeof(struct Map));
+ }
+ RIORemoveFromSavedTable(p, &HostP->Mapping[unit]);
+
+ return 0;
+}
+
+
+/*
+** RIOFindFreeID :
+**
+** This function scans the given host table for either one
+** or two free unit ID's.
+*/
+int
+RIOFindFreeID(struct rio_info *p, struct Host *HostP, uint *pID1, uint *pID2)
+{
+ int unit,tempID;
+
+ /*
+ ** Initialise the ID's to MAX_RUP.
+ ** We do this to make the loop for setting the ID's as simple as
+ ** possible.
+ */
+ *pID1 = MAX_RUP;
+ if (pID2 != NULL)
+ *pID2 = MAX_RUP;
+
+ /*
+ ** Scan all entries of the host mapping table for free slots.
+ ** We scan for free slots first and then if that is not successful
+ ** we start all over again looking for tentative slots we can re-use.
+ */
+ for (unit = 0; unit < MAX_RUP; unit++)
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, ("Scanning unit %d\n",unit));
+ /*
+ ** If the flags are zero then the slot is empty.
+ */
+ if (HostP->Mapping[unit].Flags == 0)
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, (" This slot is empty.\n"));
+ /*
+ ** If we haven't allocated the first ID then do it now.
+ */
+ if (*pID1 == MAX_RUP)
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, ("Make tentative entry for first unit %d\n", unit));
+ *pID1 = unit;
+
+ /*
+ ** If the second ID is not needed then we can return
+ ** now.
+ */
+ if (pID2 == NULL)
+ return 0;
+ }
+ else
+ {
+ /*
+ ** Allocate the second slot and return.
+ */
+ rio_dprint(RIO_DEBUG_ROUTE, ("Make tentative entry for second unit %d\n", unit));
+ *pID2 = unit;
+ return 0;
+ }
+ }
+ }
+
+ /*
+ ** If we manage to come out of the free slot loop then we
+ ** need to start all over again looking for tentative slots
+ ** that we can re-use.
+ */
+ rio_dprint(RIO_DEBUG_ROUTE, ("Starting to scan for tentative slots\n"));
+ for (unit = 0; unit < MAX_RUP; unit++)
+ {
+ if (((HostP->Mapping[unit].Flags & SLOT_TENTATIVE) ||
+ (HostP->Mapping[unit].Flags == 0)) && !
+ (HostP->Mapping[unit].Flags & RTA16_SECOND_SLOT ))
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, (" Slot %d looks promising.\n",unit));
+
+ if(unit == *pID1)
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, (" No it isn't, its the 1st half\n"));
+ continue;
+ }
+
+ /*
+ ** Slot is Tentative or Empty, but not a tentative second
+ ** slot of a 16 porter.
+ ** Attempt to free up this slot (and its parnter if
+ ** it is a 16 port slot. The second slot will become
+ ** empty after a call to RIOFreeDisconnected so thats why
+ ** we look for empty slots above as well).
+ */
+ if (HostP->Mapping[unit].Flags != 0)
+ if (RIOFreeDisconnected(p, HostP, unit) != 0)
+ continue;
+ /*
+ ** If we haven't allocated the first ID then do it now.
+ */
+ if (*pID1 == MAX_RUP)
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, ("Grab tentative entry for first unit %d\n", unit));
+ *pID1 = unit;
+
+ /*
+ ** Clear out this slot now that we intend to use it.
+ */
+ bzero(&HostP->Mapping[unit], sizeof(struct Map));
+
+ /*
+ ** If the second ID is not needed then we can return
+ ** now.
+ */
+ if (pID2 == NULL)
+ return 0;
+ }
+ else
+ {
+ /*
+ ** Allocate the second slot and return.
+ */
+ rio_dprint(RIO_DEBUG_ROUTE, ("Grab tentative/empty entry for second unit %d\n",
+ unit));
+ *pID2 = unit;
+
+ /*
+ ** Clear out this slot now that we intend to use it.
+ */
+ bzero(&HostP->Mapping[unit], sizeof(struct Map));
+
+ /* At this point under the right(wrong?) conditions
+ ** we may have a first unit ID being higher than the
+ ** second unit ID. This is a bad idea if we are about
+ ** to fill the slots with a 16 port RTA.
+ ** Better check and swap them over.
+ */
+
+ if (*pID1 > *pID2)
+ {
+ rio_dprint(RIO_DEBUG_ROUTE, ("Swapping IDS %d %d\n",*pID1,*pID2));
+ tempID = *pID1;
+ *pID1 = *pID2;
+ *pID2 = tempID;
+ }
+ return 0;
+ }
+ }
+ }
+
+ /*
+ ** If we manage to get to the end of the second loop then we
+ ** can give up and return a failure.
+ */
+ return 1;
+}
+
+
+/*
+** The link switch scenario.
+**
+** Rta Wun (A) is connected to Tuw (A).
+** The tables are all up to date, and the system is OK.
+**
+** If Wun (A) is now moved to Wun (B) before Wun (A) can
+** become disconnected, then the follow happens:
+**
+** Tuw (A) spots the change of unit:link at the other end
+** of its link and Tuw sends a topology packet reflecting
+** the change: Tuw (A) now disconnected from Wun (A), and
+** this is closely followed by a packet indicating that
+** Tuw (A) is now connected to Wun (B).
+**
+** Wun (B) will spot that it has now become connected, and
+** Wun will send a topology packet, which indicates that
+** both Wun (A) and Wun (B) is connected to Tuw (A).
+**
+** Eventually Wun (A) realises that it is now disconnected
+** and Wun will send out a topology packet indicating that
+** Wun (A) is now disconnected.
+*/
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)