diff options
Diffstat (limited to 'drivers/char/rio/riocmd.c')
| -rw-r--r-- | drivers/char/rio/riocmd.c | 1041 |
1 files changed, 1041 insertions, 0 deletions
diff --git a/drivers/char/rio/riocmd.c b/drivers/char/rio/riocmd.c new file mode 100644 index 00000000000..533085ec6f1 --- /dev/null +++ b/drivers/char/rio/riocmd.c @@ -0,0 +1,1041 @@ +/* +** ----------------------------------------------------------------------------- +** +** Perle Specialix driver for Linux +** ported from the existing SCO driver source +** + * + * (C) 1990 - 2000 Specialix International Ltd., Byfleet, Surrey, UK. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +** +** Module : riocmd.c +** SID : 1.2 +** Last Modified : 11/6/98 10:33:41 +** Retrieved : 11/6/98 10:33:49 +** +** ident @(#)riocmd.c 1.2 +** +** ----------------------------------------------------------------------------- +*/ +#ifdef SCCS_LABELS +static char *_riocmd_c_sccs_ = "@(#)riocmd.c 1.2"; +#endif + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/errno.h> +#include <linux/tty.h> +#include <asm/io.h> +#include <asm/system.h> +#include <asm/string.h> +#include <asm/semaphore.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" + + +static struct IdentifyRta IdRta; +static struct KillNeighbour KillUnit; + +int +RIOFoadRta(struct Host *HostP, struct Map *MapP) +{ + struct CmdBlk *CmdBlkP; + + rio_dprintk (RIO_DEBUG_CMD, "FOAD RTA\n"); + + CmdBlkP = RIOGetCmdBlk(); + + if ( !CmdBlkP ) { + rio_dprintk (RIO_DEBUG_CMD, "FOAD RTA: GetCmdBlk failed\n"); + return -ENXIO; + } + + CmdBlkP->Packet.dest_unit = MapP->ID; + CmdBlkP->Packet.dest_port = BOOT_RUP; + CmdBlkP->Packet.src_unit = 0; + CmdBlkP->Packet.src_port = BOOT_RUP; + CmdBlkP->Packet.len = 0x84; + CmdBlkP->Packet.data[0] = IFOAD; + CmdBlkP->Packet.data[1] = 0; + CmdBlkP->Packet.data[2] = IFOAD_MAGIC & 0xFF; + CmdBlkP->Packet.data[3] = (IFOAD_MAGIC >> 8) & 0xFF; + + if ( RIOQueueCmdBlk( HostP, MapP->ID-1, CmdBlkP) == RIO_FAIL ) { + rio_dprintk (RIO_DEBUG_CMD, "FOAD RTA: Failed to queue foad command\n"); + return -EIO; + } + return 0; +} + +int +RIOZombieRta(struct Host *HostP, struct Map *MapP) +{ + struct CmdBlk *CmdBlkP; + + rio_dprintk (RIO_DEBUG_CMD, "ZOMBIE RTA\n"); + + CmdBlkP = RIOGetCmdBlk(); + + if ( !CmdBlkP ) { + rio_dprintk (RIO_DEBUG_CMD, "ZOMBIE RTA: GetCmdBlk failed\n"); + return -ENXIO; + } + + CmdBlkP->Packet.dest_unit = MapP->ID; + CmdBlkP->Packet.dest_port = BOOT_RUP; + CmdBlkP->Packet.src_unit = 0; + CmdBlkP->Packet.src_port = BOOT_RUP; + CmdBlkP->Packet.len = 0x84; + CmdBlkP->Packet.data[0] = ZOMBIE; + CmdBlkP->Packet.data[1] = 0; + CmdBlkP->Packet.data[2] = ZOMBIE_MAGIC & 0xFF; + CmdBlkP->Packet.data[3] = (ZOMBIE_MAGIC >> 8) & 0xFF; + + if ( RIOQueueCmdBlk( HostP, MapP->ID-1, CmdBlkP) == RIO_FAIL ) { + rio_dprintk (RIO_DEBUG_CMD, "ZOMBIE RTA: Failed to queue zombie command\n"); + return -EIO; + } + return 0; +} + +int +RIOCommandRta(struct rio_info *p, uint RtaUnique, + int (* func)(struct Host *HostP, struct Map *MapP)) +{ + uint Host; + + rio_dprintk (RIO_DEBUG_CMD, "Command RTA 0x%x func 0x%x\n", RtaUnique, (int)func); + + if ( !RtaUnique ) + return(0); + + for ( Host = 0; Host < p->RIONumHosts; Host++ ) { + uint Rta; + struct Host *HostP = &p->RIOHosts[Host]; + + for ( Rta = 0; Rta < RTAS_PER_HOST; Rta++ ) { + struct Map *MapP = &HostP->Mapping[Rta]; + + if ( MapP->RtaUniqueNum == RtaUnique ) { + uint Link; + + /* + ** now, lets just check we have a route to it... + ** IF the routing stuff is working, then one of the + ** topology entries for this unit will have a legit + ** route *somewhere*. We care not where - if its got + ** any connections, we can get to it. + */ + for ( Link = 0; Link < LINKS_PER_UNIT; Link++ ) { + if ( MapP->Topology[Link].Unit <= (uchar)MAX_RUP ) { + /* + ** Its worth trying the operation... + */ + return (*func)( HostP, MapP ); + } + } + } + } + } + return -ENXIO; +} + + +int +RIOIdentifyRta(struct rio_info *p, caddr_t arg) +{ + uint Host; + + if ( copyin( (int)arg, (caddr_t)&IdRta, sizeof(IdRta) ) == COPYFAIL ) { + rio_dprintk (RIO_DEBUG_CMD, "RIO_IDENTIFY_RTA copy failed\n"); + p->RIOError.Error = COPYIN_FAILED; + return -EFAULT; + } + + for ( Host = 0 ; Host < p->RIONumHosts; Host++ ) { + uint Rta; + struct Host *HostP = &p->RIOHosts[Host]; + + for ( Rta = 0; Rta < RTAS_PER_HOST; Rta++ ) { + struct Map *MapP = &HostP->Mapping[Rta]; + + if ( MapP->RtaUniqueNum == IdRta.RtaUnique ) { + uint Link; + /* + ** now, lets just check we have a route to it... + ** IF the routing stuff is working, then one of the + ** topology entries for this unit will have a legit + ** route *somewhere*. We care not where - if its got + ** any connections, we can get to it. + */ + for ( Link = 0; Link < LINKS_PER_UNIT; Link++ ) { + if ( MapP->Topology[Link].Unit <= (uchar)MAX_RUP ) { + /* + ** Its worth trying the operation... + */ + struct CmdBlk *CmdBlkP; + + rio_dprintk (RIO_DEBUG_CMD, "IDENTIFY RTA\n"); + + CmdBlkP = RIOGetCmdBlk(); + + if ( !CmdBlkP ) { + rio_dprintk (RIO_DEBUG_CMD, "IDENTIFY RTA: GetCmdBlk failed\n"); + return -ENXIO; + } + + CmdBlkP->Packet.dest_unit = MapP->ID; + CmdBlkP->Packet.dest_port = BOOT_RUP; + CmdBlkP->Packet.src_unit = 0; + CmdBlkP->Packet.src_port = BOOT_RUP; + CmdBlkP->Packet.len = 0x84; + CmdBlkP->Packet.data[0] = IDENTIFY; + CmdBlkP->Packet.data[1] = 0; + CmdBlkP->Packet.data[2] = IdRta.ID; + + if ( RIOQueueCmdBlk( HostP, MapP->ID-1, CmdBlkP) == RIO_FAIL ) { + rio_dprintk (RIO_DEBUG_CMD, "IDENTIFY RTA: Failed to queue command\n"); + return -EIO; + } + return 0; + } + } + } + } + } + return -ENOENT; +} + + +int +RIOKillNeighbour(struct rio_info *p, caddr_t arg) +{ + uint Host; + uint ID; + struct Host *HostP; + struct CmdBlk *CmdBlkP; + + rio_dprintk (RIO_DEBUG_CMD, "KILL HOST NEIGHBOUR\n"); + + if ( copyin( (int)arg, (caddr_t)&KillUnit, sizeof(KillUnit) ) == COPYFAIL ) { + rio_dprintk (RIO_DEBUG_CMD, "RIO_KILL_NEIGHBOUR copy failed\n"); + p->RIOError.Error = COPYIN_FAILED; + return -EFAULT; + } + + if ( KillUnit.Link > 3 ) + return -ENXIO; + + CmdBlkP = RIOGetCmdBlk(); + + if ( !CmdBlkP ) { + rio_dprintk (RIO_DEBUG_CMD, "UFOAD: GetCmdBlk failed\n"); + return -ENXIO; + } + + CmdBlkP->Packet.dest_unit = 0; + CmdBlkP->Packet.src_unit = 0; + CmdBlkP->Packet.dest_port = BOOT_RUP; + CmdBlkP->Packet.src_port = BOOT_RUP; + CmdBlkP->Packet.len = 0x84; + CmdBlkP->Packet.data[0] = UFOAD; + CmdBlkP->Packet.data[1] = KillUnit.Link; + CmdBlkP->Packet.data[2] = UFOAD_MAGIC & 0xFF; + CmdBlkP->Packet.data[3] = (UFOAD_MAGIC >> 8) & 0xFF; + + for ( Host = 0; Host < p->RIONumHosts; Host++ ) { + ID = 0; + HostP = &p->RIOHosts[Host]; + + if ( HostP->UniqueNum == KillUnit.UniqueNum ) { + if ( RIOQueueCmdBlk( HostP, RTAS_PER_HOST+KillUnit.Link, + CmdBlkP) == RIO_FAIL ) { + rio_dprintk (RIO_DEBUG_CMD, "UFOAD: Failed queue command\n"); + return -EIO; + } + return 0; + } + + for ( ID=0; ID < RTAS_PER_HOST; ID++ ) { + if ( HostP->Mapping[ID].RtaUniqueNum == KillUnit.UniqueNum ) { + CmdBlkP->Packet.dest_unit = ID+1; + if ( RIOQueueCmdBlk( HostP, ID, CmdBlkP) == RIO_FAIL ) { + rio_dprintk (RIO_DEBUG_CMD, "UFOAD: Failed queue command\n"); + return -EIO; + } + return 0; + } + } + } + RIOFreeCmdBlk( CmdBlkP ); + return -ENXIO; +} + +int +RIOSuspendBootRta(struct Host *HostP, int ID, int Link) +{ + struct CmdBlk *CmdBlkP; + + rio_dprintk (RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA ID %d, link %c\n", ID, 'A' + Link); + + CmdBlkP = RIOGetCmdBlk(); + + if ( !CmdBlkP ) { + rio_dprintk (RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: GetCmdBlk failed\n"); + return -ENXIO; + } + + CmdBlkP->Packet.dest_unit = ID; + CmdBlkP->Packet.dest_port = BOOT_RUP; + CmdBlkP->Packet.src_unit = 0; + CmdBlkP->Packet.src_port = BOOT_RUP; + CmdBlkP->Packet.len = 0x84; + CmdBlkP->Packet.data[0] = IWAIT; + CmdBlkP->Packet.data[1] = Link; + CmdBlkP->Packet.data[2] = IWAIT_MAGIC & 0xFF; + CmdBlkP->Packet.data[3] = (IWAIT_MAGIC >> 8) & 0xFF; + + if ( RIOQueueCmdBlk( HostP, ID - 1, CmdBlkP) == RIO_FAIL ) { + rio_dprintk (RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: Failed to queue iwait command\n"); + return -EIO; + } + return 0; +} + +int +RIOFoadWakeup(struct rio_info *p) +{ + int port; + register struct Port *PortP; + unsigned long flags; + + for ( port=0; port<RIO_PORTS; port++) { + PortP = p->RIOPortp[port]; + + rio_spin_lock_irqsave(&PortP->portSem, flags); + PortP->Config = 0; + PortP->State = 0; + PortP->InUse = NOT_INUSE; + PortP->PortState = 0; + PortP->FlushCmdBodge = 0; + PortP->ModemLines = 0; + PortP->ModemState = 0; + PortP->CookMode = 0; + PortP->ParamSem = 0; + PortP->Mapped = 0; + PortP->WflushFlag = 0; + PortP->MagicFlags = 0; + PortP->RxDataStart = 0; + PortP->TxBufferIn = 0; + PortP->TxBufferOut = 0; + rio_spin_unlock_irqrestore(&PortP->portSem, flags); + } + return(0); +} + +/* +** Incoming command on the COMMAND_RUP to be processed. +*/ +static int +RIOCommandRup(struct rio_info *p, uint Rup, struct Host *HostP, PKT *PacketP) +{ + struct PktCmd *PktCmdP = (struct PktCmd *)PacketP->data; + struct Port *PortP; + struct UnixRup *UnixRupP; + ushort SysPort; + ushort ReportedModemStatus; + ushort rup; + ushort subCommand; + unsigned long flags; + + func_enter (); + +#ifdef CHECK + CheckHost( Host ); + CheckHostP( HostP ); + CheckPacketP( PacketP ); +#endif + + /* + ** 16 port RTA note: + ** Command rup packets coming from the RTA will have pkt->data[1] (which + ** translates to PktCmdP->PhbNum) set to the host port number for the + ** particular unit. To access the correct BaseSysPort for a 16 port RTA, + ** we can use PhbNum to get the rup number for the appropriate 8 port + ** block (for the first block, this should be equal to 'Rup'). + */ + rup = RBYTE(PktCmdP->PhbNum) / (ushort)PORTS_PER_RTA; + UnixRupP = &HostP->UnixRups[rup]; + SysPort = UnixRupP->BaseSysPort + + (RBYTE(PktCmdP->PhbNum) % (ushort)PORTS_PER_RTA); + rio_dprintk (RIO_DEBUG_CMD, "Command on rup %d, port %d\n", rup, SysPort); + +#ifdef CHECK + CheckRup( rup ); + CheckUnixRupP( UnixRupP ); +#endif + if ( UnixRupP->BaseSysPort == NO_PORT ) { + rio_dprintk (RIO_DEBUG_CMD, "OBSCURE ERROR!\n"); + rio_dprintk (RIO_DEBUG_CMD, "Diagnostics follow. Please WRITE THESE DOWN and report them to Specialix Technical Support\n"); + rio_dprintk (RIO_DEBUG_CMD, "CONTROL information: Host number %d, name ``%s''\n", + HostP-p->RIOHosts, HostP->Name ); + rio_dprintk (RIO_DEBUG_CMD, "CONTROL information: Rup number 0x%x\n", rup); + + if ( Rup >= (ushort)MAX_RUP ) { + rio_dprintk (RIO_DEBUG_CMD, "CONTROL information: This is the RUP for RTA ``%s''\n", + HostP->Mapping[Rup].Name); + } else + rio_dprintk (RIO_DEBUG_CMD, "CONTROL information: This is the RUP for link ``%c'' of host ``%s''\n", + ('A' + Rup - MAX_RUP), HostP->Name); + + rio_dprintk (RIO_DEBUG_CMD, "PACKET information: Destination 0x%x:0x%x\n", + PacketP->dest_unit, PacketP->dest_port ); + rio_dprintk (RIO_DEBUG_CMD, "PACKET information: Source 0x%x:0x%x\n", + PacketP->src_unit, PacketP->src_port ); + rio_dprintk (RIO_DEBUG_CMD, "PACKET information: Length 0x%x (%d)\n", PacketP->len,PacketP->len ); + rio_dprintk (RIO_DEBUG_CMD, "PACKET information: Control 0x%x (%d)\n", PacketP->control, PacketP->control); + rio_dprintk (RIO_DEBUG_CMD, "PACKET information: Check 0x%x (%d)\n", PacketP->csum, PacketP->csum ); + rio_dprintk (RIO_DEBUG_CMD, "COMMAND information: Host Port Number 0x%x, " + "Command Code 0x%x\n", PktCmdP->PhbNum, PktCmdP->Command ); + return TRUE; + } + +#ifdef CHECK + CheckSysPort( SysPort ); +#endif + PortP = p->RIOPortp[ SysPort ]; + rio_spin_lock_irqsave(&PortP->portSem, flags); + switch( RBYTE(PktCmdP->Command) ) { + case BREAK_RECEIVED: + rio_dprintk (RIO_DEBUG_CMD, "Received a break!\n"); + /* If the current line disc. is not multi-threading and + the current processor is not the default, reset rup_intr + and return FALSE to ensure that the command packet is + not freed. */ + /* Call tmgr HANGUP HERE */ + /* Fix this later when every thing works !!!! RAMRAJ */ + gs_got_break (&PortP->gs); + break; + + case COMPLETE: + rio_dprintk (RIO_DEBUG_CMD, "Command complete on phb %d host %d\n", + RBYTE(PktCmdP->PhbNum), HostP-p->RIOHosts); + subCommand = 1; + switch (RBYTE(PktCmdP->SubCommand)) { + case MEMDUMP : + rio_dprintk (RIO_DEBUG_CMD, "Memory dump cmd (0x%x) from addr 0x%x\n", + RBYTE(PktCmdP->SubCommand), RWORD(PktCmdP->SubAddr)); + break; + case READ_REGISTER : + rio_dprintk (RIO_DEBUG_CMD, "Read register (0x%x)\n", RWORD(PktCmdP->SubAddr)); + p->CdRegister = (RBYTE(PktCmdP->ModemStatus) & MSVR1_HOST); + break; + default : + subCommand = 0; + break; + } + if (subCommand) + break; + rio_dprintk (RIO_DEBUG_CMD, "New status is 0x%x was 0x%x\n", + RBYTE(PktCmdP->PortStatus),PortP->PortState); + if (PortP->PortState != RBYTE(PktCmdP->PortStatus)) { + rio_dprintk (RIO_DEBUG_CMD, "Mark status & wakeup\n"); + PortP->PortState = RBYTE(PktCmdP->PortStatus); + /* What should we do here ... + wakeup( &PortP->PortState ); + */ + } else + rio_dprintk (RIO_DEBUG_CMD, "No change\n"); + + /* FALLTHROUGH */ + case MODEM_STATUS: + /* + ** Knock out the tbusy and tstop bits, as these are not relevant + ** to the check for modem status change (they're just there because + ** it's a convenient place to put them!). + */ + ReportedModemStatus = RBYTE(PktCmdP->ModemStatus); + if ((PortP->ModemState & MSVR1_HOST) == + (ReportedModemStatus & MSVR1_HOST)) { + rio_dprintk (RIO_DEBUG_CMD, "Modem status unchanged 0x%x\n", PortP->ModemState); + /* + ** Update ModemState just in case tbusy or tstop states have + ** changed. + */ + PortP->ModemState = ReportedModemStatus; + } + else { + rio_dprintk (RIO_DEBUG_CMD, "Modem status change from 0x%x to 0x%x\n", + PortP->ModemState, ReportedModemStatus); + PortP->ModemState = ReportedModemStatus; +#ifdef MODEM_SUPPORT + if ( PortP->Mapped ) { + /***********************************************************\ + ************************************************************* + *** *** + *** M O D E M S T A T E C H A N G E *** + *** *** + ************************************************************* + \***********************************************************/ + /* + ** If the device is a modem, then check the modem + ** carrier. + */ + if (PortP->gs.tty == NULL) + break; + if (PortP->gs.tty->termios == NULL) + break; + + if (!(PortP->gs.tty->termios->c_cflag & CLOCAL) && + ((PortP->State & (RIO_MOPEN|RIO_WOPEN)))) { + + rio_dprintk (RIO_DEBUG_CMD, "Is there a Carrier?\n"); + /* + ** Is there a carrier? + */ + if ( PortP->ModemState & MSVR1_CD ) { + /* + ** Has carrier just appeared? + */ + if (!(PortP->State & RIO_CARR_ON)) { + rio_dprintk (RIO_DEBUG_CMD, "Carrier just came up.\n"); + PortP->State |= RIO_CARR_ON; + /* + ** wakeup anyone in WOPEN + */ + if (PortP->State & (PORT_ISOPEN | RIO_WOPEN) ) + wake_up_interruptible (&PortP->gs.open_wait); +#ifdef STATS + PortP->Stat.ModemOnCnt++; +#endif + } + } else { + /* + ** Has carrier just dropped? + */ + if (PortP->State & RIO_CARR_ON) { + if (PortP->State & (PORT_ISOPEN|RIO_WOPEN|RIO_MOPEN)) + tty_hangup (PortP->gs.tty); + PortP->State &= ~RIO_CARR_ON; + rio_dprintk (RIO_DEBUG_CMD, "Carrirer just went down\n"); +#ifdef STATS + PortP->Stat.ModemOffCnt++; +#endif + } + } + } + } +#endif + } + break; + + default: + rio_dprintk (RIO_DEBUG_CMD, "Unknown command %d on CMD_RUP of host %d\n", + RBYTE(PktCmdP->Command),HostP-p->RIOHosts); + break; + } + rio_spin_unlock_irqrestore(&PortP->portSem, flags); + + func_exit (); + + return TRUE; +} +/* +** The command mechanism: +** Each rup has a chain of commands associated with it. +** This chain is maintained by routines in this file. +** Periodically we are called and we run a quick check of all the +** active chains to determine if there is a command to be executed, +** and if the rup is ready to accept it. +** +*/ + +/* +** Allocate an empty command block. +*/ +struct CmdBlk * +RIOGetCmdBlk(void) +{ + struct CmdBlk *CmdBlkP; + + CmdBlkP = (struct CmdBlk *)sysbrk(sizeof(struct CmdBlk)); + if (CmdBlkP) + bzero(CmdBlkP, sizeof(struct CmdBlk)); + + return CmdBlkP; +} + +/* +** Return a block to the head of the free list. +*/ +void +RIOFreeCmdBlk(struct CmdBlk *CmdBlkP) +{ + sysfree((void *)CmdBlkP, sizeof(struct CmdBlk)); +} + +/* +** attach a command block to the list of commands to be performed for +** a given rup. +*/ +int +RIOQueueCmdBlk(struct Host *HostP, uint Rup, struct CmdBlk *CmdBlkP) +{ + struct CmdBlk **Base; + struct UnixRup *UnixRupP; + unsigned long flags; + +#ifdef CHECK + CheckHostP( HostP ); + CheckRup( Rup ); + CheckCmdBlkP( CmdBlkP ); +#endif + if ( Rup >= (ushort)(MAX_RUP+LINKS_PER_UNIT) ) { + rio_dprintk (RIO_DEBUG_CMD, "Illegal rup number %d in RIOQueueCmdBlk\n",Rup); + RIOFreeCmdBlk( CmdBlkP ); + return RIO_FAIL; + } + + UnixRupP = &HostP->UnixRups[Rup]; + + rio_spin_lock_irqsave(&UnixRupP->RupLock, flags); + + /* + ** If the RUP is currently inactive, then put the request + ** straight on the RUP.... + */ + if ( (UnixRupP->CmdsWaitingP == NULL) && (UnixRupP->CmdPendingP == NULL) && + (RWORD(UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE ) && + (CmdBlkP->PreFuncP ? (*CmdBlkP->PreFuncP)(CmdBlkP->PreArg,CmdBlkP) + :TRUE)) { + rio_dprintk (RIO_DEBUG_CMD, "RUP inactive-placing command straight on. Cmd byte is 0x%x\n", + CmdBlkP->Packet.data[0]); + + /* + ** Whammy! blat that pack! + */ + HostP->Copy( (caddr_t)&CmdBlkP->Packet, + RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt ), sizeof(PKT) ); + + /* + ** place command packet on the pending position. + */ + UnixRupP->CmdPendingP = CmdBlkP; + + /* + ** set the command register + */ + WWORD(UnixRupP->RupP->txcontrol , TX_PACKET_READY); + + rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags); + + return RIO_SUCCESS; + } + rio_dprintk (RIO_DEBUG_CMD, "RUP active - en-queing\n"); + + if ( UnixRupP->CmdsWaitingP != NULL) + rio_dprintk (RIO_DEBUG_CMD, "Rup active - command waiting\n"); + if ( UnixRupP->CmdPendingP != NULL ) + rio_dprintk (RIO_DEBUG_CMD, "Rup active - command pending\n"); + if ( RWORD(UnixRupP->RupP->txcontrol) != TX_RUP_INACTIVE ) + rio_dprintk (RIO_DEBUG_CMD, "Rup active - command rup not ready\n"); + + Base = &UnixRupP->CmdsWaitingP; + + rio_dprintk (RIO_DEBUG_CMD, "First try to queue cmdblk 0x%x at 0x%x\n", (int)CmdBlkP,(int)Base); + + while ( *Base ) { + rio_dprintk (RIO_DEBUG_CMD, "Command cmdblk 0x%x here\n", (int)(*Base)); + Base = &((*Base)->NextP); + rio_dprintk (RIO_DEBUG_CMD, "Now try to queue cmd cmdblk 0x%x at 0x%x\n", + (int)CmdBlkP,(int)Base); + } + + rio_dprintk (RIO_DEBUG_CMD, "Will queue cmdblk 0x%x at 0x%x\n",(int)CmdBlkP,(int)Base); + + *Base = CmdBlkP; + + CmdBlkP->NextP = NULL; + + rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags); + + return RIO_SUCCESS; +} + +/* +** Here we go - if there is an empty rup, fill it! +** must be called at splrio() or higher. +*/ +void +RIOPollHostCommands(struct rio_info *p, struct Host *HostP) +{ + register struct CmdBlk *CmdBlkP; + register struct UnixRup *UnixRupP; + struct PKT *PacketP; + ushort Rup; + unsigned long flags; + + + Rup = MAX_RUP+LINKS_PER_UNIT; + + do { /* do this loop for each RUP */ + /* + ** locate the rup we are processing & lock it + */ + UnixRupP = &HostP->UnixRups[--Rup]; + + spin_lock_irqsave(&UnixRupP->RupLock, flags); + + /* + ** First check for incoming commands: + */ + if ( RWORD(UnixRupP->RupP->rxcontrol) != RX_RUP_INACTIVE ) { + int FreeMe; + + PacketP =(PKT *)RIO_PTR(HostP->Caddr,RWORD(UnixRupP->RupP->rxpkt)); + + ShowPacket( DBG_CMD, PacketP ); + + switch ( RBYTE(PacketP->dest_port) ) { + case BOOT_RUP: + rio_dprintk (RIO_DEBUG_CMD, "Incoming Boot %s packet '%x'\n", + RBYTE(PacketP->len) & 0x80 ? "Command":"Data", + RBYTE(PacketP->data[0])); + rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags); + FreeMe= RIOBootRup(p, Rup,HostP,PacketP); + rio_spin_lock_irqsave(&UnixRupP->RupLock, flags); + break; + + case COMMAND_RUP: + /* + ** Free the RUP lock as loss of carrier causes a + ** ttyflush which will (eventually) call another + ** routine that uses the RUP lock. + */ + rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags); + FreeMe= RIOCommandRup(p, Rup,HostP,PacketP); + if (PacketP->data[5] == MEMDUMP) { + rio_dprintk (RIO_DEBUG_CMD, "Memdump from 0x%x complete\n", + *(ushort *) &(PacketP->data[6])); + HostP->Copy( (caddr_t)&(PacketP->data[8]), + (caddr_t)p->RIOMemDump, 32 ); + } + rio_spin_lock_irqsave(&UnixRupP->RupLock, flags); + break; + + case ROUTE_RUP: + rio_spin_unlock_irqrestore( &UnixRupP->RupLock, flags); + FreeMe = RIORouteRup(p, Rup, HostP, PacketP ); + rio_spin_lock_irqsave( &UnixRupP->RupLock, flags ); + break; + + default: + rio_dprintk (RIO_DEBUG_CMD, "Unknown RUP %d\n", RBYTE(PacketP->dest_port)); + FreeMe = 1; + break; + } + + if ( FreeMe ) { + rio_dprintk (RIO_DEBUG_CMD, "Free processed incoming command packet\n"); + put_free_end(HostP,PacketP); + + WWORD(UnixRupP->RupP->rxcontrol , RX_RUP_INACTIVE); + + if ( RWORD(UnixRupP->RupP->handshake)==PHB_HANDSHAKE_SET ) { + rio_dprintk (RIO_DEBUG_CMD, "Handshake rup %d\n",Rup); + WWORD(UnixRupP->RupP->handshake, + PHB_HANDSHAKE_SET|PHB_HANDSHAKE_RESET); + } + } + } + + /* + ** IF a command was running on the port, + ** and it has completed, then tidy it up. + */ + if ( (CmdBlkP = UnixRupP->CmdPendingP) && /* ASSIGN! */ + (RWORD(UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) { + /* + ** we are idle. + ** there is a command in pending. + ** Therefore, this command has finished. + ** So, wakeup whoever is waiting for it (and tell them + ** what happened). + */ + if ( CmdBlkP->Packet.dest_port == BOOT_RUP ) + rio_dprintk (RIO_DEBUG_CMD, "Free Boot %s Command Block '%x'\n", + CmdBlkP->Packet.len & 0x80 ? "Command":"Data", + CmdBlkP->Packet.data[0]); + + rio_dprintk (RIO_DEBUG_CMD, "Command 0x%x completed\n",(int)CmdBlkP); + + /* + ** Clear the Rup lock to prevent mutual exclusion. + */ + if ( CmdBlkP->PostFuncP ) { + rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags); + (*CmdBlkP->PostFuncP) (CmdBlkP->PostArg,CmdBlkP); + rio_spin_lock_irqsave(&UnixRupP->RupLock, flags); + } + + /* + ** ....clear the pending flag.... + */ + UnixRupP->CmdPendingP = NULL; + + /* + ** ....and return the command block to the freelist. + */ + RIOFreeCmdBlk( CmdBlkP ); + } + + /* + ** If there is a command for this rup, and the rup + ** is idle, then process the command + */ + if ( (CmdBlkP = UnixRupP->CmdsWaitingP) && /* ASSIGN! */ + (UnixRupP->CmdPendingP == NULL) && + (RWORD(UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) { + /* + ** if the pre-function is non-zero, call it. + ** If it returns RIO_FAIL then don't + ** send this command yet! + */ +#ifdef CHECK + CheckCmdBlkP (CmdBlkP); +#endif + if ( !(CmdBlkP->PreFuncP ? + (*CmdBlkP->PreFuncP)(CmdBlkP->PreArg, CmdBlkP) : TRUE)) { + rio_dprintk (RIO_DEBUG_CMD, "Not ready to start command 0x%x\n",(int)CmdBlkP); + } + else { + rio_dprintk (RIO_DEBUG_CMD, "Start new command 0x%x Cmd byte is 0x%x\n", + (int)CmdBlkP, CmdBlkP->Packet.data[0]); + /* + ** Whammy! blat that pack! + */ +#ifdef CHECK + CheckPacketP ((PKT *)RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt)); +#endif + HostP->Copy( (caddr_t)&CmdBlkP->Packet, + RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt), sizeof(PKT)); + + /* + ** remove the command from the rup command queue... + */ + UnixRupP->CmdsWaitingP = CmdBlkP->NextP; + + /* + ** ...and place it on the pending position. + */ + UnixRupP->CmdPendingP = CmdBlkP; + + /* + ** set the command register + */ + WWORD(UnixRupP->RupP->txcontrol,TX_PACKET_READY); + + /* + ** the command block will be freed + ** when the command has been processed. + */ + } + } + spin_unlock_irqrestore(&UnixRupP->RupLock, flags); + } while ( Rup ); +} + +int +RIOWFlushMark(int iPortP, struct CmdBlk *CmdBlkP) +{ + struct Port * PortP = (struct Port *)iPortP; + unsigned long flags; + + rio_spin_lock_irqsave(&PortP->portSem, flags); +#ifdef CHECK + CheckPortP( PortP ); +#endif + PortP->WflushFlag++; + PortP->MagicFlags |= MAGIC_FLUSH; + rio_spin_unlock_irqrestore(&PortP->portSem, flags); + return RIOUnUse( iPortP, CmdBlkP ); +} + +int +RIORFlushEnable(int iPortP, struct CmdBlk *CmdBlkP) +{ + struct Port * PortP = (struct Port *)iPortP; + PKT *PacketP; + unsigned long flags; + + rio_spin_lock_irqsave(&PortP->portSem, flags); + + while ( can_remove_receive(&PacketP, PortP) ) { + remove_receive(PortP); + ShowPacket(DBG_PROC, PacketP ); + put_free_end( PortP->HostP, PacketP ); + } + + if ( RWORD(PortP->PhbP->handshake)==PHB_HANDSHAKE_SET ) { + /* + ** MAGIC! (Basically, handshake the RX buffer, so that + ** the RTAs upstream can be re-enabled.) + */ + rio_dprintk (RIO_DEBUG_CMD, "Util: Set RX handshake bit\n"); + WWORD(PortP->PhbP->handshake, PHB_HANDSHAKE_SET|PHB_HANDSHAKE_RESET); + } + rio_spin_unlock_irqrestore(&PortP->portSem, flags); + return RIOUnUse( iPortP, CmdBlkP ); +} + +int +RIOUnUse(int iPortP, struct CmdBlk *CmdBlkP) +{ + struct Port * PortP = (struct Port *)iPortP; + unsigned long flags; + + rio_spin_lock_irqsave(&PortP->portSem, flags); + +#ifdef CHECK + CheckPortP( PortP ); +#endif + rio_dprintk (RIO_DEBUG_CMD, "Decrement in use count for port\n"); + + if (PortP->InUse) { + if ( --PortP->InUse != NOT_INUSE ) { + rio_spin_unlock_irqrestore(&PortP->portSem, flags); + return 0; + } + } + /* + ** While PortP->InUse is set (i.e. a preemptive command has been sent to + ** the RTA and is awaiting completion), any transmit data is prevented from + ** being transferred from the write queue into the transmit packets + ** (add_transmit) and no furthur transmit interrupt will be sent for that + ** data. The next interrupt will occur up to 500ms later (RIOIntr is called + ** twice a second as a saftey measure). This was the case when kermit was + ** used to send data into a RIO port. After each packet was sent, TCFLSH + ** was called to flush the read queue preemptively. PortP->InUse was + ** incremented, thereby blocking the 6 byte acknowledgement packet + ** transmitted back. This acknowledgment hung around for 500ms before + ** being sent, thus reducing input performance substantially!. + ** When PortP->InUse becomes NOT_INUSE, we must ensure that any data + ** hanging around in the transmit buffer is sent immediately. + */ + WWORD(PortP->HostP->ParmMapP->tx_intr, 1); + /* What to do here .. + wakeup( (caddr_t)&(PortP->InUse) ); + */ + rio_spin_unlock_irqrestore(&PortP->portSem, flags); + return 0; +} + +void +ShowPacket(uint Flags, struct PKT *PacketP) +{ +} + +/* +** +** How to use this file: +** +** To send a command down a rup, you need to allocate a command block, fill +** in the packet information, fill in the command number, fill in the pre- +** and post- functions and arguments, and then add the command block to the +** queue of command blocks for the port in question. When the port is idle, +** then the pre-function will be called. If this returns RIO_FAIL then the +** command will be re-queued and tried again at a later date (probably in one +** clock tick). If the pre-function returns NOT RIO_FAIL, then the command +** packet will be queued on the RUP, and the txcontrol field set to the +** command number. When the txcontrol field has changed from being the +** command number, then the post-function will be called, with the argument +** specified earlier, a pointer to the command block, and the value of +** txcontrol. +** +** To allocate a command block, call RIOGetCmdBlk(). This returns a pointer +** to the command block structure allocated, or NULL if there aren't any. +** The block will have been zeroed for you. +** +** The structure has the following fields: +** +** struct CmdBlk +** { +** struct CmdBlk *NextP; ** Pointer to next command block ** +** struct PKT Packet; ** A packet, to copy to the rup ** +** int (*PreFuncP)(); ** The func to call to check if OK ** +** int PreArg; ** The arg for the func ** +** int (*PostFuncP)(); ** The func to call when completed ** +** int PostArg; ** The arg for the func ** +** }; +** +** You need to fill in ALL fields EXCEPT NextP, which is used to link the +** blocks together either on the free list or on the Rup list. +** +** Packet is an actual packet structure to be filled in with the packet +** information associated with the command. You need to fill in everything, +** as the command processore doesn't process the command packet in any way. +** +** The PreFuncP is called before the packet is enqueued on the host rup. +** PreFuncP is called as (*PreFuncP)(PreArg, CmdBlkP);. PreFuncP must +** return !RIO_FAIL to have the packet queued on the rup, and RIO_FAIL +** if the packet is NOT to be queued. +** +** The PostFuncP is called when the command has completed. It is called +** as (*PostFuncP)(PostArg, CmdBlkP, txcontrol);. PostFuncP is not expected +** to return a value. PostFuncP does NOT need to free the command block, +** as this happens automatically after PostFuncP returns. +** +** Once the command block has been filled in, it is attached to the correct +** queue by calling RIOQueueCmdBlk( HostP, Rup, CmdBlkP ) where HostP is +** a pointer to the struct Host, Rup is the NUMBER of the rup (NOT a pointer +** to it!), and CmdBlkP is the pointer to the command block allocated using +** RIOGetCmdBlk(). +** +*/ |