rioroute.c
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上传日期:2013-02-24
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文件大小:35k
- /*
- ** -----------------------------------------------------------------------------
- **
- ** 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/slab.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_dprintk (RIO_DEBUG_ROUTE, "LIES! DAMN LIES! %d LIES!n",Lies);
- rio_dprintk (RIO_DEBUG_ROUTE, "%d:%c %d:%c %d:%c %d:%cn",
- 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_dprintk (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_dprintk (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_dprintk (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_dprintk (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_dprintk (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_dprintk (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_dprintk (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_dprintk (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_dprintk (RIO_DEBUG_ROUTE, "Unknown command %d received on rup %d host %d ROUTE_RUPn",
- 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_dprintk (RIO_DEBUG_ROUTE, "Received a request for an ID for serial number %xn", 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_dprintk (RIO_DEBUG_ROUTE, "Backplane type is %s (all ports)n",
- p->RIOModuleTypes[Mod1].Name);
- }
- else
- {
- Mod2 = HINYBLE(Mod);
- rio_dprintk (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_dprintk (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_dprintk (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_dprintk (RIO_DEBUG_ROUTE, "Entry %d Flags=%s %s UniqueNum=0x%xn",
- 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_dprintk (RIO_DEBUG_ROUTE, "Found unit 0x%x at slots %d+%dn",
- RtaUniq,ThisUnit,ThisUnit2);
- }
- else
- rio_dprintk (RIO_DEBUG_ROUTE, "Found unit 0x%x at slot %dn",
- 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_dprintk (RIO_DEBUG_ROUTE, "RTA '%s' has been allocated IDs %d+%dn",
- HostP->Mapping[ThisUnit].Name, PktReplyP->IDNum, PktReplyP->IDNum2);
- }
- else
- {
- PktReplyP->IDNum2 = ROUTE_NO_ID;
- rio_dprintk (RIO_DEBUG_ROUTE, "RTA '%s' has been allocated ID %dn",
- 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_dprintk (RIO_DEBUG_ROUTE, "Re-opened this portn");
- 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_dprintk (RIO_DEBUG_ROUTE, "Re-opened this portn");
- 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_dprintk (RIO_DEBUG_ROUTE, "RIOFixPhbs unit %d sysport %dn", 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_dprintk (RIO_DEBUG_ROUTE, "Tx pkts not set up yetn");
- rio_spin_unlock_irqrestore(&PortP->portSem, flags);
- 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_dprintk (RIO_DEBUG_ROUTE, "phb dest: Old %x:%x New %x:%xn",
- 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_dprintk (RIO_DEBUG_ROUTE, "last port on host link %d: %dn", 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_dprintk (RIO_DEBUG_ROUTE, "Unit %d is NOT isolatedn", 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_dprintk (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 hostn",UnitId)); */
- rio_dprintk (RIO_DEBUG_ROUTE, "RIOCheck : UnitID = %dn", 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 - ignoringn", 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_dprintk (RIO_DEBUG_ROUTE, "Unit type: Hostn");
- return(TYPE_HOST);
- case RIO_RTA_16:
- rio_dprintk (RIO_DEBUG_ROUTE, "Unit type: 16 port RTAn");
- return(TYPE_RTA16);
- case RIO_RTA:
- rio_dprintk (RIO_DEBUG_ROUTE, "Unit type: 8 port RTAn");
- return(TYPE_RTA8);
- default :
- rio_dprintk (RIO_DEBUG_ROUTE, "Unit type: Unrecognisedn");
- return(99);
- }
- }
- int
- RIOSetChange(p)
- struct rio_info * p;
- {
- if ( p->RIOQuickCheck != NOT_CHANGED )
- return(0);
- p->RIOQuickCheck = CHANGED;
- if ( p->RIOSignalProcess ) {
- rio_dprintk (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_dprintk (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_dprintk (RIO_DEBUG_ROUTE, "RIOFreeDisconnect unit %dn", 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_dprintk (RIO_DEBUG_ROUTE, "Just about to check LBOLT on entry %dn", unit);
- if (drv_getparm(LBOLT, (ulong_t *) ¤t_time))
- rio_dprintk (RIO_DEBUG_ROUTE, "drv_getparm(LBOLT,....) Failed.n");
- elapse_time = current_time - TentTime[unit];
- rio_dprintk (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_dprintk (RIO_DEBUG_ROUTE, "Skipping slot %d, not timed out yet %dn",
- 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_dprintk (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_dprintk (RIO_DEBUG_ROUTE, "Scanning unit %dn",unit);
- /*
- ** If the flags are zero then the slot is empty.
- */
- if (HostP->Mapping[unit].Flags == 0)
- {
- rio_dprintk (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_dprintk (RIO_DEBUG_ROUTE, "Make tentative entry for first unit %dn", 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_dprintk (RIO_DEBUG_ROUTE, "Make tentative entry for second unit %dn", 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_dprintk (RIO_DEBUG_ROUTE, "Starting to scan for tentative slotsn");
- 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_dprintk (RIO_DEBUG_ROUTE, " Slot %d looks promising.n",unit);
- if(unit == *pID1)
- {
- rio_dprintk (RIO_DEBUG_ROUTE, " No it isn't, its the 1st halfn");
- 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_dprintk (RIO_DEBUG_ROUTE, "Grab tentative entry for first unit %dn", 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_dprintk (RIO_DEBUG_ROUTE, "Grab tentative/empty entry for second unit %dn",
- 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_dprintk (RIO_DEBUG_ROUTE, "Swapping IDS %d %dn", *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.
- */