diff options
Diffstat (limited to 'drivers/char/rio/rioroute.c')
| -rw-r--r-- | drivers/char/rio/rioroute.c | 1238 |
1 files changed, 1238 insertions, 0 deletions
diff --git a/drivers/char/rio/rioroute.c b/drivers/char/rio/rioroute.c new file mode 100644 index 000000000000..106b31f48a21 --- /dev/null +++ b/drivers/char/rio/rioroute.c @@ -0,0 +1,1238 @@ +/* +** ----------------------------------------------------------------------------- +** +** 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 + +#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/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" + +static int RIOCheckIsolated(struct rio_info *, struct Host *, uint); +static int RIOIsolate(struct rio_info *, struct Host *, uint); +static int RIOCheck(struct Host *, uint); +static void RIOConCon(struct rio_info *, struct Host *, uint, uint, uint, uint, int); + + +/* +** 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:%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_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_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_dprintk (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_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%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_dprintk (RIO_DEBUG_ROUTE, "Found unit 0x%x at slots %d+%d\n", + RtaUniq,ThisUnit,ThisUnit2); + } + else + rio_dprintk (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_dprintk (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_dprintk (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_dprintk (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_dprintk (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 + ** relevant 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 %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_dprintk (RIO_DEBUG_ROUTE, "Tx pkts not set up yet\n"); + 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:%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_dprintk (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. +*/ +static 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 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. +*/ +static 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; +} + +static 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_dprintk (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_dprintk (RIO_DEBUG_ROUTE, "Unit type: Host\n"); + return(TYPE_HOST); + case RIO_RTA_16: + rio_dprintk (RIO_DEBUG_ROUTE, "Unit type: 16 port RTA\n"); + return(TYPE_RTA16); + case RIO_RTA: + rio_dprintk (RIO_DEBUG_ROUTE, "Unit type: 8 port RTA\n"); + return(TYPE_RTA8); + default : + rio_dprintk (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_dprintk (RIO_DEBUG_ROUTE, "Send SIG-HUP"); + /* + psignal( RIOSignalProcess, SIGHUP ); + */ + } + return(0); +} + +static 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. +*/ +static 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 + ** it's 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. +*/ +static int +RIOFreeDisconnected(struct rio_info *p, struct Host *HostP, int unit) +{ + int link; + + + rio_dprintk (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_dprintk (RIO_DEBUG_ROUTE, "Just about to check LBOLT on entry %d\n", 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 %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_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 %d\n",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 %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_dprintk (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_dprintk (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_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 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_dprintk (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_dprintk (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_dprintk (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. +*/ |