Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/char/rio/riocmd.c b/drivers/char/rio/riocmd.c
new file mode 100644
index 0000000..533085e
--- /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().
+**
+*/