diff options
Diffstat (limited to 'drivers/char/rio/rioroute.c')
| -rw-r--r-- | drivers/char/rio/rioroute.c | 1039 |
1 files changed, 0 insertions, 1039 deletions
diff --git a/drivers/char/rio/rioroute.c b/drivers/char/rio/rioroute.c deleted file mode 100644 index f9b936a..0000000 --- a/drivers/char/rio/rioroute.c +++ /dev/null @@ -1,1039 +0,0 @@ -/* -** ----------------------------------------------------------------------------- -** -** 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 -** -** ----------------------------------------------------------------------------- -*/ - -#include <linux/module.h> -#include <linux/errno.h> -#include <asm/io.h> -#include <asm/system.h> -#include <asm/string.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 "pkt.h" -#include "daemon.h" -#include "rio.h" -#include "riospace.h" -#include "cmdpkt.h" -#include "map.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 "phb.h" -#include "link.h" -#include "cmdblk.h" -#include "route.h" -#include "cirrus.h" -#include "rioioctl.h" -#include "param.h" - -static int RIOCheckIsolated(struct rio_info *, struct Host *, unsigned int); -static int RIOIsolate(struct rio_info *, struct Host *, unsigned int); -static int RIOCheck(struct Host *, unsigned int); -static void RIOConCon(struct rio_info *, struct Host *, unsigned int, unsigned int, unsigned int, unsigned int, int); - - -/* -** Incoming on the ROUTE_RUP -** I wrote this while I was tired. Forgive me. -*/ -int RIORouteRup(struct rio_info *p, unsigned int Rup, struct Host *HostP, struct PKT __iomem * PacketP) -{ - struct PktCmd __iomem *PktCmdP = (struct PktCmd __iomem *) 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; - unsigned short RtaType; - unsigned int RtaUniq; - unsigned int ThisUnit, ThisUnit2; /* 2 ids to accommodate 16 port RTA */ - unsigned int OldUnit, NewUnit, OldLink, NewLink; - char *MyType, *MyName; - int Lies; - unsigned long flags; - - /* - ** Is this unit telling us it's current link topology? - */ - if (readb(&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 >= (unsigned short) 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 (readb(&PktCmdP->RouteTopology[ThisLink].Unit) > (unsigned short) MAX_RUP) - continue; - - for (NewLink = ThisLinkMin; NewLink < ThisLink; NewLink++) { - if ((readb(&PktCmdP->RouteTopology[ThisLink].Unit) == readb(&PktCmdP->RouteTopology[NewLink].Unit)) && (readb(&PktCmdP->RouteTopology[ThisLink].Link) == readb(&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", - readb(&PktCmdP->RouteTopology[0].Unit), - 'A' + readb(&PktCmdP->RouteTopology[0].Link), - readb(&PktCmdP->RouteTopology[1].Unit), - 'A' + readb(&PktCmdP->RouteTopology[1].Link), readb(&PktCmdP->RouteTopology[2].Unit), 'A' + readb(&PktCmdP->RouteTopology[2].Link), readb(&PktCmdP->RouteTopology[3].Unit), 'A' + readb(&PktCmdP->RouteTopology[3].Link)); - return 1; - } - - /* - ** 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 = readb(&PktCmdP->RouteTopology[ThisLink].Unit); - NewLink = readb(&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) - printk(KERN_DEBUG "rio: %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 1; - } - - /* - ** The only other command we recognise is a route_request command - */ - if (readb(&PktCmdP->Command) != ROUTE_REQUEST) { - rio_dprintk(RIO_DEBUG_ROUTE, "Unknown command %d received on rup %d host %p ROUTE_RUP\n", readb(&PktCmdP->Command), Rup, HostP); - return 1; - } - - RtaUniq = (readb(&PktCmdP->UniqNum[0])) + (readb(&PktCmdP->UniqNum[1]) << 8) + (readb(&PktCmdP->UniqNum[2]) << 16) + (readb(&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 = readb(&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); - } - - /* - ** 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; - memcpy(PktReplyP->CommandText, "RT_FOAD", 7); - RIOQueueCmdBlk(HostP, Rup, CmdBlkP); - return 1; - } - - /* - ** 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) - printk(KERN_DEBUG "rio: RTA '%s' is being updated.\n", HostP->Mapping[ThisUnit].Name); - HostP->Mapping[ThisUnit].Flags |= MSG_DONE; - } - PktReplyP->Command = ROUTE_FOAD; - memcpy(PktReplyP->CommandText, "RT_FOAD", 7); - RIOQueueCmdBlk(HostP, Rup, CmdBlkP); - return 1; - } - - /* - ** 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); - } - memcpy(PktReplyP->CommandText, "RT_ALLOCAT", 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 1; - } - } - /* - ** 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) - printk(KERN_DEBUG "rio: One or more unknown RTAs are being updated.\n"); - UnknownMesgDone = 1; - } - - PktReplyP->Command = ROUTE_FOAD; - memcpy(PktReplyP->CommandText, "RT_FOAD", 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); - rio_fill_host_slot(ThisUnit, ThisUnit2, RtaUniq, HostP); - } - } else { - if (RIOFindFreeID(p, HostP, &ThisUnit, NULL) == 0) { - RIODefaultName(p, HostP, ThisUnit); - rio_fill_host_slot(ThisUnit, 0, RtaUniq, HostP); - } - } - PktReplyP->Command = ROUTE_USED; - memcpy(PktReplyP->CommandText, "RT_USED", 7); - } - RIOQueueCmdBlk(HostP, Rup, CmdBlkP); - return 1; -} - - -void RIOFixPhbs(struct rio_info *p, struct Host *HostP, unsigned int unit) -{ - unsigned short 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) { - unsigned short 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 = readw(&PortP->PhbP->link); - - for (port = 0; port < PORTS_PER_RTA; port++, PortN++) { - unsigned short dest_port = port + 8; - u16 __iomem *TxPktP; - struct PKT __iomem *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) { - 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 = (struct PKT __iomem *) RIO_PTR(HostP->Caddr, readw(TxPktP)); - - /* - ** If the packet is used, reset it. - */ - Pkt = (struct PKT __iomem *) ((unsigned long) Pkt & ~PKT_IN_USE); - writeb(dest_unit, &Pkt->dest_unit); - writeb(dest_port, &Pkt->dest_port); - } - rio_dprintk(RIO_DEBUG_ROUTE, "phb dest: Old %x:%x New %x:%x\n", readw(&PortP->PhbP->destination) & 0xff, (readw(&PortP->PhbP->destination) >> 8) & 0xff, dest_unit, dest_port); - writew(dest_unit + (dest_port << 8), &PortP->PhbP->destination); - writew(link, &PortP->PhbP->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) > readw(&HostP->LinkStrP[link].last_port)) { - rio_dprintk(RIO_DEBUG_ROUTE, "last port on host link %d: %d\n", link, (unit * 8) + 7); - writew((unit * 8) + 7, &HostP->LinkStrP[link].last_port); - } - } -} - -/* -** 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(struct rio_info *p, struct Host *HostP, unsigned int UnitId) -{ - unsigned long flags; - rio_spin_lock_irqsave(&HostP->HostLock, flags); - - 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(struct rio_info *p, struct Host *HostP, unsigned int UnitId) -{ - unsigned int link, unit; - - 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(struct Host *HostP, unsigned int UnitId) -{ - unsigned char link; - -/* 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) -*/ - -unsigned int GetUnitType(unsigned int 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(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(struct rio_info *p, - struct Host *HostP, - unsigned int FromId, - unsigned int FromLink, - unsigned int ToId, - unsigned int 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"); - printk(KERN_DEBUG "rio: 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) { - memset(&p->RIOSavedTable[entry], 0, 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; - -#ifdef 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 *) & current_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); - memset(&HostP->Mapping[nOther], 0, 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, unsigned int * pID1, unsigned int * 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. - */ - memset(&HostP->Mapping[unit], 0, 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. - */ - memset(&HostP->Mapping[unit], 0, 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. -*/ |
