drivers/char/rio/riocmd.c

   1 /*
   2 ** -----------------------------------------------------------------------------
   3 **
   4 **  Perle Specialix driver for Linux
   5 **  ported from the existing SCO driver source
   6 **
   7  *
   8  *  (C) 1990 - 2000 Specialix International Ltd., Byfleet, Surrey, UK.
   9  *
  10  *      This program is free software; you can redistribute it and/or modify
  11  *      it under the terms of the GNU General Public License as published by
  12  *      the Free Software Foundation; either version 2 of the License, or
  13  *      (at your option) any later version.
  14  *
  15  *      This program is distributed in the hope that it will be useful,
  16  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *      GNU General Public License for more details.
  19  *
  20  *      You should have received a copy of the GNU General Public License
  21  *      along with this program; if not, write to the Free Software
  22  *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 **
  24 **      Module          : riocmd.c
  25 **      SID             : 1.2
  26 **      Last Modified   : 11/6/98 10:33:41
  27 **      Retrieved       : 11/6/98 10:33:49
  28 **
  29 **  ident @(#)riocmd.c  1.2
  30 **
  31 ** -----------------------------------------------------------------------------
  32 */
  33 #ifdef SCCS_LABELS
  34 static char *_riocmd_c_sccs_ = "@(#)riocmd.c    1.2";
  35 #endif
  36
  37 #include <linux/module.h>
  38 #include <linux/slab.h>
  39 #include <linux/errno.h>
  40 #include <linux/tty.h>
  41 #include <asm/io.h>
  42 #include <asm/system.h>
  43 #include <asm/string.h>
  44 #include <asm/semaphore.h>
  45
  46 #include <linux/termios.h>
  47 #include <linux/serial.h>
  48
  49 #include <linux/generic_serial.h>
  50
  51 #include "linux_compat.h"
  52 #include "rio_linux.h"
  53 #include "typdef.h"
  54 #include "pkt.h"
  55 #include "daemon.h"
  56 #include "rio.h"
  57 #include "riospace.h"
  58 #include "top.h"
  59 #include "cmdpkt.h"
  60 #include "map.h"
  61 #include "riotypes.h"
  62 #include "rup.h"
  63 #include "port.h"
  64 #include "riodrvr.h"
  65 #include "rioinfo.h"
  66 #include "func.h"
  67 #include "errors.h"
  68 #include "pci.h"
  69
  70 #include "parmmap.h"
  71 #include "unixrup.h"
  72 #include "board.h"
  73 #include "host.h"
  74 #include "error.h"
  75 #include "phb.h"
  76 #include "link.h"
  77 #include "cmdblk.h"
  78 #include "route.h"
  79 #include "control.h"
  80 #include "cirrus.h"
  81
  82
  83 static struct IdentifyRta IdRta;
  84 static struct KillNeighbour KillUnit;
  85
  86 int
  87 RIOFoadRta(struct Host *HostP, struct Map *MapP)
  88 {
  89         struct CmdBlk *CmdBlkP;
  90
  91         rio_dprintk (RIO_DEBUG_CMD, "FOAD RTA\n");
  92
  93         CmdBlkP = RIOGetCmdBlk();
  94
  95         if ( !CmdBlkP ) {
  96                 rio_dprintk (RIO_DEBUG_CMD, "FOAD RTA: GetCmdBlk failed\n");
  97                 return -ENXIO;
  98         }
  99
 100         CmdBlkP->Packet.dest_unit = MapP->ID;
 101         CmdBlkP->Packet.dest_port = BOOT_RUP;
 102         CmdBlkP->Packet.src_unit  = 0;
 103         CmdBlkP->Packet.src_port  = BOOT_RUP;
 104         CmdBlkP->Packet.len        = 0x84;
 105         CmdBlkP->Packet.data[0]   = IFOAD;
 106         CmdBlkP->Packet.data[1]   = 0;
 107         CmdBlkP->Packet.data[2]   = IFOAD_MAGIC & 0xFF;
 108         CmdBlkP->Packet.data[3]   = (IFOAD_MAGIC >> 8) & 0xFF;
 109
 110         if ( RIOQueueCmdBlk( HostP, MapP->ID-1, CmdBlkP) == RIO_FAIL ) {
 111                 rio_dprintk (RIO_DEBUG_CMD, "FOAD RTA: Failed to queue foad command\n");
 112                 return -EIO;
 113         }
 114         return 0;
 115 }
 116
 117 int
 118 RIOZombieRta(struct Host *HostP, struct Map *MapP)
 119 {
 120         struct CmdBlk *CmdBlkP;
 121
 122         rio_dprintk (RIO_DEBUG_CMD, "ZOMBIE RTA\n");
 123
 124         CmdBlkP = RIOGetCmdBlk();
 125
 126         if ( !CmdBlkP ) {
 127                 rio_dprintk (RIO_DEBUG_CMD, "ZOMBIE RTA: GetCmdBlk failed\n");
 128                 return -ENXIO;
 129         }
 130
 131         CmdBlkP->Packet.dest_unit = MapP->ID;
 132         CmdBlkP->Packet.dest_port = BOOT_RUP;
 133         CmdBlkP->Packet.src_unit  = 0;
 134         CmdBlkP->Packet.src_port  = BOOT_RUP;
 135         CmdBlkP->Packet.len        = 0x84;
 136         CmdBlkP->Packet.data[0]   = ZOMBIE;
 137         CmdBlkP->Packet.data[1]   = 0;
 138         CmdBlkP->Packet.data[2]   = ZOMBIE_MAGIC & 0xFF;
 139         CmdBlkP->Packet.data[3]   = (ZOMBIE_MAGIC >> 8) & 0xFF;
 140
 141         if ( RIOQueueCmdBlk( HostP, MapP->ID-1, CmdBlkP) == RIO_FAIL ) {
 142                 rio_dprintk (RIO_DEBUG_CMD, "ZOMBIE RTA: Failed to queue zombie command\n");
 143                 return -EIO;
 144         }
 145         return 0;
 146 }
 147
 148 int
 149 RIOCommandRta(struct rio_info *p, uint RtaUnique,
 150         int (* func)(struct Host *HostP, struct Map *MapP))
 151 {
 152         uint Host;
 153
 154         rio_dprintk (RIO_DEBUG_CMD, "Command RTA 0x%x func 0x%x\n", RtaUnique, (int)func);
 155
 156         if ( !RtaUnique )
 157                 return(0);
 158
 159         for ( Host = 0; Host < p->RIONumHosts; Host++ ) {
 160                 uint Rta;
 161                 struct Host *HostP = &p->RIOHosts[Host];
 162
 163                 for ( Rta = 0; Rta < RTAS_PER_HOST; Rta++ ) {
 164                         struct Map *MapP = &HostP->Mapping[Rta];
 165
 166                         if ( MapP->RtaUniqueNum == RtaUnique ) {
 167                                 uint Link;
 168
 169                                 /*
 170                                 ** now, lets just check we have a route to it...
 171                                 ** IF the routing stuff is working, then one of the
 172                                 ** topology entries for this unit will have a legit
 173                                 ** route *somewhere*. We care not where - if its got
 174                                 ** any connections, we can get to it.
 175                                 */
 176                                 for ( Link = 0; Link < LINKS_PER_UNIT; Link++ ) {
 177                                         if ( MapP->Topology[Link].Unit <= (uchar)MAX_RUP ) {
 178                                                 /*
 179                                                 ** Its worth trying the operation...
 180                                                 */
 181                                                 return (*func)( HostP, MapP );
 182                                         }
 183                                 }
 184                         }
 185                 }
 186         }
 187         return -ENXIO;
 188 }
 189
 190
 191 int
 192 RIOIdentifyRta(struct rio_info *p, caddr_t arg)
 193 {
 194         uint Host;
 195
 196         if ( copyin( (int)arg, (caddr_t)&IdRta, sizeof(IdRta) ) == COPYFAIL ) {
 197                 rio_dprintk (RIO_DEBUG_CMD, "RIO_IDENTIFY_RTA copy failed\n");
 198                 p->RIOError.Error = COPYIN_FAILED;
 199                 return -EFAULT;
 200         }
 201
 202         for ( Host = 0 ; Host < p->RIONumHosts; Host++ ) {
 203                 uint Rta;
 204                 struct Host *HostP = &p->RIOHosts[Host];
 205
 206                 for ( Rta = 0; Rta < RTAS_PER_HOST; Rta++ ) {
 207                         struct Map *MapP = &HostP->Mapping[Rta];
 208
 209                         if ( MapP->RtaUniqueNum == IdRta.RtaUnique ) {
 210                                 uint Link;
 211                                 /*
 212                                 ** now, lets just check we have a route to it...
 213                                 ** IF the routing stuff is working, then one of the
 214                                 ** topology entries for this unit will have a legit
 215                                 ** route *somewhere*. We care not where - if its got
 216                                 ** any connections, we can get to it.
 217                                 */
 218                                 for ( Link = 0; Link < LINKS_PER_UNIT; Link++ ) {
 219                                         if ( MapP->Topology[Link].Unit <= (uchar)MAX_RUP ) {
 220                                                 /*
 221                                                 ** Its worth trying the operation...
 222                                                 */
 223                                                 struct CmdBlk *CmdBlkP;
 224
 225                                                 rio_dprintk (RIO_DEBUG_CMD, "IDENTIFY RTA\n");
 226
 227                                                 CmdBlkP = RIOGetCmdBlk();
 228
 229                                                 if ( !CmdBlkP ) {
 230                                                         rio_dprintk (RIO_DEBUG_CMD, "IDENTIFY RTA: GetCmdBlk failed\n");
 231                                                         return -ENXIO;
 232                                                 }
 233
 234                                                 CmdBlkP->Packet.dest_unit = MapP->ID;
 235                                                 CmdBlkP->Packet.dest_port = BOOT_RUP;
 236                                                 CmdBlkP->Packet.src_unit  = 0;
 237                                                 CmdBlkP->Packet.src_port  = BOOT_RUP;
 238                                                 CmdBlkP->Packet.len        = 0x84;
 239                                                 CmdBlkP->Packet.data[0]   = IDENTIFY;
 240                                                 CmdBlkP->Packet.data[1]   = 0;
 241                                                 CmdBlkP->Packet.data[2]   = IdRta.ID;
 242
 243                                                 if ( RIOQueueCmdBlk( HostP, MapP->ID-1, CmdBlkP) == RIO_FAIL ) {
 244                                                         rio_dprintk (RIO_DEBUG_CMD, "IDENTIFY RTA: Failed to queue command\n");
 245                                                         return -EIO;
 246                                                 }
 247                                                 return 0;
 248                                         }
 249                                 }
 250                         }
 251                 }
 252         }
 253         return -ENOENT;
 254 }
 255
 256
 257 int
 258 RIOKillNeighbour(struct rio_info *p, caddr_t arg)
 259 {
 260         uint Host;
 261         uint ID;
 262         struct Host *HostP;
 263         struct CmdBlk *CmdBlkP;
 264
 265         rio_dprintk (RIO_DEBUG_CMD, "KILL HOST NEIGHBOUR\n");
 266
 267         if ( copyin( (int)arg, (caddr_t)&KillUnit, sizeof(KillUnit) ) == COPYFAIL ) {
 268                 rio_dprintk (RIO_DEBUG_CMD, "RIO_KILL_NEIGHBOUR copy failed\n");
 269                 p->RIOError.Error = COPYIN_FAILED;
 270                 return -EFAULT;
 271         }
 272
 273         if ( KillUnit.Link > 3 )
 274                 return -ENXIO;
 275
 276         CmdBlkP = RIOGetCmdBlk();
 277
 278         if ( !CmdBlkP ) {
 279                 rio_dprintk (RIO_DEBUG_CMD, "UFOAD: GetCmdBlk failed\n");
 280                 return -ENXIO;
 281         }
 282
 283         CmdBlkP->Packet.dest_unit = 0;
 284         CmdBlkP->Packet.src_unit  = 0;
 285         CmdBlkP->Packet.dest_port = BOOT_RUP;
 286         CmdBlkP->Packet.src_port  = BOOT_RUP;
 287         CmdBlkP->Packet.len        = 0x84;
 288         CmdBlkP->Packet.data[0]   = UFOAD;
 289         CmdBlkP->Packet.data[1]   = KillUnit.Link;
 290         CmdBlkP->Packet.data[2]   = UFOAD_MAGIC & 0xFF;
 291         CmdBlkP->Packet.data[3]   = (UFOAD_MAGIC >> 8) & 0xFF;
 292
 293         for ( Host = 0; Host < p->RIONumHosts; Host++ ) {
 294                 ID = 0;
 295                 HostP = &p->RIOHosts[Host];
 296
 297                 if ( HostP->UniqueNum == KillUnit.UniqueNum ) {
 298                         if ( RIOQueueCmdBlk( HostP, RTAS_PER_HOST+KillUnit.Link,
 299                                                         CmdBlkP) == RIO_FAIL ) {
 300                                 rio_dprintk (RIO_DEBUG_CMD, "UFOAD: Failed queue command\n");
 301                                 return -EIO;
 302                         }
 303                         return 0;
 304                 }
 305
 306                 for ( ID=0; ID < RTAS_PER_HOST; ID++ ) {
 307                         if ( HostP->Mapping[ID].RtaUniqueNum == KillUnit.UniqueNum ) {
 308                                 CmdBlkP->Packet.dest_unit = ID+1;
 309                                 if ( RIOQueueCmdBlk( HostP, ID, CmdBlkP) == RIO_FAIL ) {
 310                                         rio_dprintk (RIO_DEBUG_CMD, "UFOAD: Failed queue command\n");
 311                                         return -EIO;
 312                                 }
 313                                 return 0;
 314                         }
 315                 }
 316         }
 317         RIOFreeCmdBlk( CmdBlkP );
 318         return -ENXIO;
 319 }
 320
 321 int
 322 RIOSuspendBootRta(struct Host *HostP, int ID, int Link)
 323 {
 324         struct CmdBlk *CmdBlkP;
 325
 326         rio_dprintk (RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA ID %d, link %c\n", ID, 'A' + Link);
 327
 328         CmdBlkP = RIOGetCmdBlk();
 329
 330         if ( !CmdBlkP ) {
 331                 rio_dprintk (RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: GetCmdBlk failed\n");
 332                 return -ENXIO;
 333         }
 334
 335         CmdBlkP->Packet.dest_unit = ID;
 336         CmdBlkP->Packet.dest_port = BOOT_RUP;
 337         CmdBlkP->Packet.src_unit  = 0;
 338         CmdBlkP->Packet.src_port  = BOOT_RUP;
 339         CmdBlkP->Packet.len        = 0x84;
 340         CmdBlkP->Packet.data[0]   = IWAIT;
 341         CmdBlkP->Packet.data[1]   = Link;
 342         CmdBlkP->Packet.data[2]   = IWAIT_MAGIC & 0xFF;
 343         CmdBlkP->Packet.data[3]   = (IWAIT_MAGIC >> 8) & 0xFF;
 344
 345         if ( RIOQueueCmdBlk( HostP, ID - 1, CmdBlkP) == RIO_FAIL ) {
 346                 rio_dprintk (RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: Failed to queue iwait command\n");
 347                 return -EIO;
 348         }
 349         return 0;
 350 }
 351
 352 int
 353 RIOFoadWakeup(struct rio_info *p)
 354 {
 355         int port;
 356         register struct Port *PortP;
 357         unsigned long flags;
 358
 359         for ( port=0; port<RIO_PORTS; port++) {
 360                 PortP = p->RIOPortp[port];
 361
 362                 rio_spin_lock_irqsave(&PortP->portSem, flags);
 363                 PortP->Config = 0;
 364                 PortP->State = 0;
 365                 PortP->InUse = NOT_INUSE;
 366                 PortP->PortState = 0;
 367                 PortP->FlushCmdBodge = 0;
 368                 PortP->ModemLines = 0;
 369                 PortP->ModemState = 0;
 370                 PortP->CookMode = 0;
 371                 PortP->ParamSem = 0;
 372                 PortP->Mapped = 0;
 373                 PortP->WflushFlag = 0;
 374                 PortP->MagicFlags = 0;
 375                 PortP->RxDataStart = 0;
 376                 PortP->TxBufferIn = 0;
 377                 PortP->TxBufferOut = 0;
 378                 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 379         }
 380         return(0);
 381 }
 382
 383 /*
 384 ** Incoming command on the COMMAND_RUP to be processed.
 385 */
 386 static int
 387 RIOCommandRup(struct rio_info *p, uint Rup, struct Host *HostP, PKT *PacketP)
 388 {
 389         struct PktCmd *PktCmdP = (struct PktCmd *)PacketP->data;
 390         struct Port *PortP;
 391         struct UnixRup *UnixRupP;
 392         ushort SysPort;
 393         ushort ReportedModemStatus;
 394         ushort rup;
 395         ushort subCommand;
 396         unsigned long flags;
 397
 398         func_enter ();
 399
 400 #ifdef CHECK
 401         CheckHost( Host );
 402         CheckHostP( HostP );
 403         CheckPacketP( PacketP );
 404 #endif
 405
 406         /*
 407         ** 16 port RTA note:
 408         ** Command rup packets coming from the RTA will have pkt->data[1] (which
 409         ** translates to PktCmdP->PhbNum) set to the host port number for the
 410         ** particular unit. To access the correct BaseSysPort for a 16 port RTA,
 411         ** we can use PhbNum to get the rup number for the appropriate 8 port
 412         ** block (for the first block, this should be equal to 'Rup').
 413         */
 414         rup = RBYTE(PktCmdP->PhbNum) / (ushort)PORTS_PER_RTA;
 415         UnixRupP = &HostP->UnixRups[rup];
 416         SysPort = UnixRupP->BaseSysPort +
 417                         (RBYTE(PktCmdP->PhbNum) % (ushort)PORTS_PER_RTA);
 418         rio_dprintk (RIO_DEBUG_CMD, "Command on rup %d, port %d\n", rup, SysPort);
 419
 420 #ifdef CHECK
 421         CheckRup( rup );
 422         CheckUnixRupP( UnixRupP );
 423 #endif
 424         if ( UnixRupP->BaseSysPort == NO_PORT ) {
 425                 rio_dprintk (RIO_DEBUG_CMD, "OBSCURE ERROR!\n");
 426                 rio_dprintk (RIO_DEBUG_CMD, "Diagnostics follow. Please WRITE THESE DOWN and report them to Specialix Technical Support\n");
 427                 rio_dprintk (RIO_DEBUG_CMD, "CONTROL information: Host number %d, name ``%s''\n",
 428                              HostP-p->RIOHosts, HostP->Name );
 429                 rio_dprintk (RIO_DEBUG_CMD, "CONTROL information: Rup number  0x%x\n", rup);
 430
 431                 if ( Rup >= (ushort)MAX_RUP ) {
 432                         rio_dprintk (RIO_DEBUG_CMD, "CONTROL information: This is the RUP for RTA ``%s''\n",
 433                                      HostP->Mapping[Rup].Name);
 434                 } else
 435                         rio_dprintk (RIO_DEBUG_CMD, "CONTROL information: This is the RUP for link ``%c'' of host ``%s''\n",
 436                                      ('A' + Rup - MAX_RUP), HostP->Name);
 437
 438                 rio_dprintk (RIO_DEBUG_CMD, "PACKET information: Destination 0x%x:0x%x\n",
 439                              PacketP->dest_unit, PacketP->dest_port );
 440                 rio_dprintk (RIO_DEBUG_CMD, "PACKET information: Source   0x%x:0x%x\n",
 441                              PacketP->src_unit, PacketP->src_port );
 442                 rio_dprintk (RIO_DEBUG_CMD, "PACKET information: Length   0x%x (%d)\n", PacketP->len,PacketP->len );
 443                 rio_dprintk (RIO_DEBUG_CMD, "PACKET information: Control         0x%x (%d)\n", PacketP->control, PacketP->control);
 444                 rio_dprintk (RIO_DEBUG_CMD, "PACKET information: Check     0x%x (%d)\n", PacketP->csum, PacketP->csum );
 445                 rio_dprintk (RIO_DEBUG_CMD, "COMMAND information: Host Port Number 0x%x, "
 446                                         "Command Code 0x%x\n", PktCmdP->PhbNum, PktCmdP->Command );
 447                 return TRUE;
 448         }
 449
 450 #ifdef CHECK
 451         CheckSysPort( SysPort );
 452 #endif
 453         PortP = p->RIOPortp[ SysPort ];
 454         rio_spin_lock_irqsave(&PortP->portSem, flags);
 455         switch( RBYTE(PktCmdP->Command) ) {
 456                 case BREAK_RECEIVED:
 457                         rio_dprintk (RIO_DEBUG_CMD, "Received a break!\n");
 458                         /* If the current line disc. is not multi-threading and
 459                                 the current processor is not the default, reset rup_intr
 460                                 and return FALSE to ensure that the command packet is
 461                                 not freed. */
 462                         /* Call tmgr HANGUP HERE */
 463                         /* Fix this later when every thing works !!!! RAMRAJ */
 464                         gs_got_break (&PortP->gs);
 465                         break;
 466
 467                 case COMPLETE:
 468                         rio_dprintk (RIO_DEBUG_CMD, "Command complete on phb %d host %d\n",
 469                              RBYTE(PktCmdP->PhbNum), HostP-p->RIOHosts);
 470                         subCommand = 1;
 471                         switch (RBYTE(PktCmdP->SubCommand)) {
 472                                 case MEMDUMP :
 473                         rio_dprintk (RIO_DEBUG_CMD, "Memory dump cmd (0x%x) from addr 0x%x\n",
 474                                      RBYTE(PktCmdP->SubCommand), RWORD(PktCmdP->SubAddr));
 475                                         break;
 476                                 case READ_REGISTER :
 477                         rio_dprintk (RIO_DEBUG_CMD, "Read register (0x%x)\n", RWORD(PktCmdP->SubAddr));
 478                                         p->CdRegister = (RBYTE(PktCmdP->ModemStatus) & MSVR1_HOST);
 479                                         break;
 480                                 default :
 481                                         subCommand = 0;
 482                                 break;
 483                         }
 484                         if (subCommand)
 485                                 break;
 486                         rio_dprintk (RIO_DEBUG_CMD, "New status is 0x%x was 0x%x\n",
 487                                      RBYTE(PktCmdP->PortStatus),PortP->PortState);
 488                         if (PortP->PortState != RBYTE(PktCmdP->PortStatus)) {
 489                                 rio_dprintk (RIO_DEBUG_CMD, "Mark status & wakeup\n");
 490                                 PortP->PortState = RBYTE(PktCmdP->PortStatus);
 491                                 /* What should we do here ...
 492                                 wakeup( &PortP->PortState );
 493                                 */
 494                 } else
 495                         rio_dprintk (RIO_DEBUG_CMD, "No change\n");
 496
 497                         /* FALLTHROUGH */
 498                 case MODEM_STATUS:
 499                         /*
 500                         ** Knock out the tbusy and tstop bits, as these are not relevant
 501                         ** to the check for modem status change (they're just there because
 502                         ** it's a convenient place to put them!).
 503                         */
 504                         ReportedModemStatus = RBYTE(PktCmdP->ModemStatus);
 505                         if ((PortP->ModemState & MSVR1_HOST) ==
 506                                         (ReportedModemStatus & MSVR1_HOST)) {
 507                                 rio_dprintk (RIO_DEBUG_CMD, "Modem status unchanged 0x%x\n", PortP->ModemState);
 508                                 /*
 509                                 ** Update ModemState just in case tbusy or tstop states have
 510                                 ** changed.
 511                                 */
 512                                 PortP->ModemState = ReportedModemStatus;
 513                         }
 514                         else {
 515                                 rio_dprintk (RIO_DEBUG_CMD, "Modem status change from 0x%x to 0x%x\n",
 516                                      PortP->ModemState, ReportedModemStatus);
 517                                 PortP->ModemState = ReportedModemStatus;
 518 #ifdef MODEM_SUPPORT
 519                                 if ( PortP->Mapped ) {
 520                                 /***********************************************************\
 521                                 *************************************************************
 522                                 ***                                                                                                        ***
 523                                 ***               M O D E M   S T A T E   C H A N G E             ***
 524                                 ***                                                                                                        ***
 525                                 *************************************************************
 526                                 \***********************************************************/
 527                                 /*
 528                                 ** If the device is a modem, then check the modem
 529                                 ** carrier.
 530                                 */
 531                                 if (PortP->gs.tty == NULL)
 532                                         break;
 533                                 if (PortP->gs.tty->termios == NULL)
 534                                         break;
 535
 536                                 if (!(PortP->gs.tty->termios->c_cflag & CLOCAL) &&
 537                                 ((PortP->State & (RIO_MOPEN|RIO_WOPEN)))) {
 538
 539                                         rio_dprintk (RIO_DEBUG_CMD, "Is there a Carrier?\n");
 540                         /*
 541                         ** Is there a carrier?
 542                         */
 543                                         if ( PortP->ModemState & MSVR1_CD ) {
 544                         /*
 545                         ** Has carrier just appeared?
 546                         */
 547                                                 if (!(PortP->State & RIO_CARR_ON)) {
 548                                                         rio_dprintk (RIO_DEBUG_CMD, "Carrier just came up.\n");
 549                                                         PortP->State |= RIO_CARR_ON;
 550                                 /*
 551                                 ** wakeup anyone in WOPEN
 552                                 */
 553                                                         if (PortP->State & (PORT_ISOPEN | RIO_WOPEN) )
 554                                                                 wake_up_interruptible (&PortP->gs.open_wait);
 555 #ifdef STATS
 556                                 PortP->Stat.ModemOnCnt++;
 557 #endif
 558                         }
 559                                         } else {
 560                         /*
 561                         ** Has carrier just dropped?
 562                         */
 563                                                 if (PortP->State & RIO_CARR_ON) {
 564                                                         if (PortP->State & (PORT_ISOPEN|RIO_WOPEN|RIO_MOPEN))
 565                                                                 tty_hangup (PortP->gs.tty);
 566                                                         PortP->State &= ~RIO_CARR_ON;
 567                                                         rio_dprintk (RIO_DEBUG_CMD, "Carrirer just went down\n");
 568 #ifdef STATS
 569                                 PortP->Stat.ModemOffCnt++;
 570 #endif
 571                         }
 572                         }
 573                 }
 574                 }
 575 #endif
 576                         }
 577                         break;
 578
 579                 default:
 580                         rio_dprintk (RIO_DEBUG_CMD, "Unknown command %d on CMD_RUP of host %d\n",
 581                              RBYTE(PktCmdP->Command),HostP-p->RIOHosts);
 582                         break;
 583         }
 584         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 585
 586         func_exit ();
 587
 588         return TRUE;
 589 }
 590 /*
 591 ** The command mechanism:
 592 **      Each rup has a chain of commands associated with it.
 593 **      This chain is maintained by routines in this file.
 594 **      Periodically we are called and we run a quick check of all the
 595 **      active chains to determine if there is a command to be executed,
 596 **      and if the rup is ready to accept it.
 597 **
 598 */
 599
 600 /*
 601 ** Allocate an empty command block.
 602 */
 603 struct CmdBlk *
 604 RIOGetCmdBlk(void)
 605 {
 606         struct CmdBlk *CmdBlkP;
 607
 608         CmdBlkP = (struct CmdBlk *)sysbrk(sizeof(struct CmdBlk));
 609         if (CmdBlkP)
 610                 bzero(CmdBlkP, sizeof(struct CmdBlk));
 611
 612         return CmdBlkP;
 613 }
 614
 615 /*
 616 ** Return a block to the head of the free list.
 617 */
 618 void
 619 RIOFreeCmdBlk(struct CmdBlk *CmdBlkP)
 620 {
 621         sysfree((void *)CmdBlkP, sizeof(struct CmdBlk));
 622 }
 623
 624 /*
 625 ** attach a command block to the list of commands to be performed for
 626 ** a given rup.
 627 */
 628 int
 629 RIOQueueCmdBlk(struct Host *HostP, uint Rup, struct CmdBlk *CmdBlkP)
 630 {
 631         struct CmdBlk **Base;
 632         struct UnixRup *UnixRupP;
 633         unsigned long flags;
 634
 635 #ifdef CHECK
 636         CheckHostP( HostP );
 637         CheckRup( Rup );
 638         CheckCmdBlkP( CmdBlkP );
 639 #endif
 640         if ( Rup >= (ushort)(MAX_RUP+LINKS_PER_UNIT) ) {
 641                 rio_dprintk (RIO_DEBUG_CMD, "Illegal rup number %d in RIOQueueCmdBlk\n",Rup);
 642                 RIOFreeCmdBlk( CmdBlkP );
 643                 return RIO_FAIL;
 644         }
 645
 646         UnixRupP = &HostP->UnixRups[Rup];
 647
 648         rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
 649
 650         /*
 651         ** If the RUP is currently inactive, then put the request
 652         ** straight on the RUP....
 653         */
 654         if ( (UnixRupP->CmdsWaitingP == NULL) && (UnixRupP->CmdPendingP == NULL) &&
 655              (RWORD(UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE ) &&
 656                 (CmdBlkP->PreFuncP ? (*CmdBlkP->PreFuncP)(CmdBlkP->PreArg,CmdBlkP)
 657                                                         :TRUE)) {
 658                 rio_dprintk (RIO_DEBUG_CMD, "RUP inactive-placing command straight on. Cmd byte is 0x%x\n",
 659                                              CmdBlkP->Packet.data[0]);
 660
 661                 /*
 662                 ** Whammy! blat that pack!
 663                 */
 664                 HostP->Copy( (caddr_t)&CmdBlkP->Packet,
 665                         RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt ), sizeof(PKT) );
 666
 667                 /*
 668                 ** place command packet on the pending position.
 669                 */
 670                 UnixRupP->CmdPendingP = CmdBlkP;
 671
 672                 /*
 673                 ** set the command register
 674                 */
 675                 WWORD(UnixRupP->RupP->txcontrol , TX_PACKET_READY);
 676
 677                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 678
 679                 return RIO_SUCCESS;
 680         }
 681         rio_dprintk (RIO_DEBUG_CMD, "RUP active - en-queing\n");
 682
 683         if ( UnixRupP->CmdsWaitingP != NULL)
 684                 rio_dprintk (RIO_DEBUG_CMD, "Rup active - command waiting\n");
 685         if ( UnixRupP->CmdPendingP != NULL )
 686                 rio_dprintk (RIO_DEBUG_CMD, "Rup active - command pending\n");
 687         if ( RWORD(UnixRupP->RupP->txcontrol) != TX_RUP_INACTIVE )
 688                 rio_dprintk (RIO_DEBUG_CMD, "Rup active - command rup not ready\n");
 689
 690         Base = &UnixRupP->CmdsWaitingP;
 691
 692         rio_dprintk (RIO_DEBUG_CMD, "First try to queue cmdblk 0x%x at 0x%x\n", (int)CmdBlkP,(int)Base);
 693
 694         while ( *Base ) {
 695                 rio_dprintk (RIO_DEBUG_CMD, "Command cmdblk 0x%x here\n", (int)(*Base));
 696                 Base = &((*Base)->NextP);
 697                 rio_dprintk (RIO_DEBUG_CMD, "Now try to queue cmd cmdblk 0x%x at 0x%x\n",
 698                                              (int)CmdBlkP,(int)Base);
 699         }
 700
 701         rio_dprintk (RIO_DEBUG_CMD, "Will queue cmdblk 0x%x at 0x%x\n",(int)CmdBlkP,(int)Base);
 702
 703         *Base = CmdBlkP;
 704
 705         CmdBlkP->NextP = NULL;
 706
 707         rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 708
 709         return RIO_SUCCESS;
 710 }
 711
 712 /*
 713 ** Here we go - if there is an empty rup, fill it!
 714 ** must be called at splrio() or higher.
 715 */
 716 void
 717 RIOPollHostCommands(struct rio_info *p, struct Host *HostP)
 718 {
 719         register struct CmdBlk *CmdBlkP;
 720         register struct UnixRup *UnixRupP;
 721         struct PKT *PacketP;
 722         ushort Rup;
 723         unsigned long flags;
 724
 725
 726         Rup = MAX_RUP+LINKS_PER_UNIT;
 727
 728         do {    /* do this loop for each RUP */
 729                 /*
 730                 ** locate the rup we are processing & lock it
 731                 */
 732                 UnixRupP = &HostP->UnixRups[--Rup];
 733
 734                 spin_lock_irqsave(&UnixRupP->RupLock, flags);
 735
 736                 /*
 737                 ** First check for incoming commands:
 738                 */
 739                 if ( RWORD(UnixRupP->RupP->rxcontrol) != RX_RUP_INACTIVE ) {
 740                         int FreeMe;
 741
 742                         PacketP =(PKT *)RIO_PTR(HostP->Caddr,RWORD(UnixRupP->RupP->rxpkt));
 743
 744                         ShowPacket( DBG_CMD, PacketP );
 745
 746                         switch ( RBYTE(PacketP->dest_port) ) {
 747                                 case BOOT_RUP:
 748                                         rio_dprintk (RIO_DEBUG_CMD, "Incoming Boot %s packet '%x'\n",
 749                                                 RBYTE(PacketP->len) & 0x80 ? "Command":"Data",
 750                                                              RBYTE(PacketP->data[0]));
 751                                         rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 752                                         FreeMe= RIOBootRup(p, Rup,HostP,PacketP);
 753                                         rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
 754                                         break;
 755
 756                                 case COMMAND_RUP:
 757                                         /*
 758                                         ** Free the RUP lock as loss of carrier causes a
 759                                         ** ttyflush which will (eventually) call another
 760                                         ** routine that uses the RUP lock.
 761                                         */
 762                                         rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 763                                         FreeMe= RIOCommandRup(p, Rup,HostP,PacketP);
 764                                         if (PacketP->data[5] == MEMDUMP) {
 765                                                 rio_dprintk (RIO_DEBUG_CMD, "Memdump from 0x%x complete\n",
 766                                                                      *(ushort *) &(PacketP->data[6]));
 767                                                 HostP->Copy( (caddr_t)&(PacketP->data[8]),
 768                                                                 (caddr_t)p->RIOMemDump, 32 );
 769                                         }
 770                                         rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
 771                                         break;
 772
 773                                 case ROUTE_RUP:
 774                                         rio_spin_unlock_irqrestore( &UnixRupP->RupLock, flags);
 775                                         FreeMe = RIORouteRup(p, Rup, HostP, PacketP );
 776                                         rio_spin_lock_irqsave( &UnixRupP->RupLock, flags );
 777                                         break;
 778
 779                                 default:
 780                                         rio_dprintk (RIO_DEBUG_CMD, "Unknown RUP %d\n", RBYTE(PacketP->dest_port));
 781                                         FreeMe = 1;
 782                                         break;
 783                         }
 784
 785                         if ( FreeMe ) {
 786                                 rio_dprintk (RIO_DEBUG_CMD, "Free processed incoming command packet\n");
 787                                 put_free_end(HostP,PacketP);
 788
 789                                 WWORD(UnixRupP->RupP->rxcontrol , RX_RUP_INACTIVE);
 790
 791                                 if ( RWORD(UnixRupP->RupP->handshake)==PHB_HANDSHAKE_SET ) {
 792                                         rio_dprintk (RIO_DEBUG_CMD, "Handshake rup %d\n",Rup);
 793                                         WWORD(UnixRupP->RupP->handshake,
 794                                                 PHB_HANDSHAKE_SET|PHB_HANDSHAKE_RESET);
 795                                 }
 796                         }
 797                 }
 798
 799                 /*
 800                 ** IF a command was running on the port,
 801                 ** and it has completed, then tidy it up.
 802                 */
 803                 if ( (CmdBlkP = UnixRupP->CmdPendingP) && /* ASSIGN! */
 804                      (RWORD(UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) {
 805                         /*
 806                         ** we are idle.
 807                         ** there is a command in pending.
 808                         ** Therefore, this command has finished.
 809                         ** So, wakeup whoever is waiting for it (and tell them
 810                         ** what happened).
 811                         */
 812                         if ( CmdBlkP->Packet.dest_port == BOOT_RUP )
 813                                 rio_dprintk (RIO_DEBUG_CMD, "Free Boot %s Command Block '%x'\n",
 814                                                 CmdBlkP->Packet.len & 0x80 ? "Command":"Data",
 815                                                              CmdBlkP->Packet.data[0]);
 816
 817                         rio_dprintk (RIO_DEBUG_CMD, "Command 0x%x completed\n",(int)CmdBlkP);
 818
 819                         /*
 820                         ** Clear the Rup lock to prevent mutual exclusion.
 821                         */
 822                         if ( CmdBlkP->PostFuncP ) {
 823                                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 824                                 (*CmdBlkP->PostFuncP) (CmdBlkP->PostArg,CmdBlkP);
 825                                 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
 826                         }
 827
 828                         /*
 829                         ** ....clear the pending flag....
 830                         */
 831                         UnixRupP->CmdPendingP = NULL;
 832
 833                         /*
 834                         ** ....and return the command block to the freelist.
 835                         */
 836                         RIOFreeCmdBlk( CmdBlkP );
 837                 }
 838
 839                 /*
 840                 ** If there is a command for this rup, and the rup
 841                 ** is idle, then process the command
 842                 */
 843                 if ( (CmdBlkP = UnixRupP->CmdsWaitingP) && /* ASSIGN! */
 844                         (UnixRupP->CmdPendingP == NULL) &&
 845                      (RWORD(UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) {
 846                         /*
 847                         ** if the pre-function is non-zero, call it.
 848                         ** If it returns RIO_FAIL then don't
 849                         ** send this command yet!
 850                         */
 851 #ifdef CHECK
 852                         CheckCmdBlkP (CmdBlkP);
 853 #endif
 854                         if ( !(CmdBlkP->PreFuncP ?
 855                                 (*CmdBlkP->PreFuncP)(CmdBlkP->PreArg, CmdBlkP) : TRUE)) {
 856                                 rio_dprintk (RIO_DEBUG_CMD, "Not ready to start command 0x%x\n",(int)CmdBlkP);
 857                         }
 858                         else {
 859                                 rio_dprintk (RIO_DEBUG_CMD, "Start new command 0x%x Cmd byte is 0x%x\n",
 860                                                              (int)CmdBlkP, CmdBlkP->Packet.data[0]);
 861                                 /*
 862                                 ** Whammy! blat that pack!
 863                                 */
 864 #ifdef CHECK
 865                                 CheckPacketP ((PKT *)RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt));
 866 #endif
 867                                 HostP->Copy( (caddr_t)&CmdBlkP->Packet,
 868                                         RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt), sizeof(PKT));
 869
 870                                 /*
 871                                 ** remove the command from the rup command queue...
 872                                 */
 873                                 UnixRupP->CmdsWaitingP = CmdBlkP->NextP;
 874
 875                                 /*
 876                                 ** ...and place it on the pending position.
 877                                 */
 878                                 UnixRupP->CmdPendingP = CmdBlkP;
 879
 880                                 /*
 881                                 ** set the command register
 882                                 */
 883                                 WWORD(UnixRupP->RupP->txcontrol,TX_PACKET_READY);
 884
 885                                 /*
 886                                 ** the command block will be freed
 887                                 ** when the command has been processed.
 888                                 */
 889                         }
 890                 }
 891                 spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 892         } while ( Rup );
 893 }
 894
 895 int
 896 RIOWFlushMark(int iPortP, struct CmdBlk *CmdBlkP)
 897 {
 898         struct Port *   PortP = (struct Port *)iPortP;
 899         unsigned long flags;
 900
 901         rio_spin_lock_irqsave(&PortP->portSem, flags);
 902 #ifdef CHECK
 903         CheckPortP( PortP );
 904 #endif
 905         PortP->WflushFlag++;
 906         PortP->MagicFlags |= MAGIC_FLUSH;
 907         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 908         return RIOUnUse( iPortP, CmdBlkP );
 909 }
 910
 911 int
 912 RIORFlushEnable(int iPortP, struct CmdBlk *CmdBlkP)
 913 {
 914         struct Port *   PortP = (struct Port *)iPortP;
 915         PKT *PacketP;
 916         unsigned long flags;
 917
 918         rio_spin_lock_irqsave(&PortP->portSem, flags);
 919
 920         while ( can_remove_receive(&PacketP, PortP) ) {
 921                 remove_receive(PortP);
 922                 ShowPacket(DBG_PROC, PacketP );
 923                 put_free_end( PortP->HostP, PacketP );
 924         }
 925
 926         if ( RWORD(PortP->PhbP->handshake)==PHB_HANDSHAKE_SET ) {
 927                 /*
 928                 ** MAGIC! (Basically, handshake the RX buffer, so that
 929                 ** the RTAs upstream can be re-enabled.)
 930                 */
 931                 rio_dprintk (RIO_DEBUG_CMD, "Util: Set RX handshake bit\n");
 932                 WWORD(PortP->PhbP->handshake, PHB_HANDSHAKE_SET|PHB_HANDSHAKE_RESET);
 933         }
 934         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 935         return RIOUnUse( iPortP, CmdBlkP );
 936 }
 937
 938 int
 939 RIOUnUse(int iPortP, struct CmdBlk *CmdBlkP)
 940 {
 941         struct Port *   PortP = (struct Port *)iPortP;
 942         unsigned long flags;
 943
 944         rio_spin_lock_irqsave(&PortP->portSem, flags);
 945
 946 #ifdef CHECK
 947         CheckPortP( PortP );
 948 #endif
 949         rio_dprintk (RIO_DEBUG_CMD, "Decrement in use count for port\n");
 950
 951         if (PortP->InUse) {
 952                 if ( --PortP->InUse != NOT_INUSE ) {
 953                         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 954                         return 0;
 955                 }
 956         }
 957         /*
 958         ** While PortP->InUse is set (i.e. a preemptive command has been sent to
 959         ** the RTA and is awaiting completion), any transmit data is prevented from
 960         ** being transferred from the write queue into the transmit packets
 961         ** (add_transmit) and no furthur transmit interrupt will be sent for that
 962         ** data. The next interrupt will occur up to 500ms later (RIOIntr is called
 963         ** twice a second as a saftey measure). This was the case when kermit was
 964         ** used to send data into a RIO port. After each packet was sent, TCFLSH
 965         ** was called to flush the read queue preemptively. PortP->InUse was
 966         ** incremented, thereby blocking the 6 byte acknowledgement packet
 967         ** transmitted back. This acknowledgment hung around for 500ms before
 968         ** being sent, thus reducing input performance substantially!.
 969         ** When PortP->InUse becomes NOT_INUSE, we must ensure that any data
 970         ** hanging around in the transmit buffer is sent immediately.
 971         */
 972         WWORD(PortP->HostP->ParmMapP->tx_intr, 1);
 973         /* What to do here ..
 974         wakeup( (caddr_t)&(PortP->InUse) );
 975         */
 976         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 977         return 0;
 978 }
 979
 980 void
 981 ShowPacket(uint Flags, struct PKT *PacketP)
 982 {
 983 }
 984
 985 /*
 986 **
 987 ** How to use this file:
 988 **
 989 ** To send a command down a rup, you need to allocate a command block, fill
 990 ** in the packet information, fill in the command number, fill in the pre-
 991 ** and post- functions and arguments, and then add the command block to the
 992 ** queue of command blocks for the port in question. When the port is idle,
 993 ** then the pre-function will be called. If this returns RIO_FAIL then the
 994 ** command will be re-queued and tried again at a later date (probably in one
 995 ** clock tick). If the pre-function returns NOT RIO_FAIL, then the command
 996 ** packet will be queued on the RUP, and the txcontrol field set to the
 997 ** command number. When the txcontrol field has changed from being the
 998 ** command number, then the post-function will be called, with the argument
 999 ** specified earlier, a pointer to the command block, and the value of
1000 ** txcontrol.
1001 **
1002 ** To allocate a command block, call RIOGetCmdBlk(). This returns a pointer
1003 ** to the command block structure allocated, or NULL if there aren't any.
1004 ** The block will have been zeroed for you.
1005 **
1006 ** The structure has the following fields:
1007 **
1008 ** struct CmdBlk
1009 ** {
1010 **       struct CmdBlk *NextP;            ** Pointer to next command block   **
1011 **       struct PKT      Packet;                ** A packet, to copy to the rup **
1012 **                      int      (*PreFuncP)();  ** The func to call to check if OK **
1013 **                      int      PreArg;                ** The arg for the func                 **
1014 **                      int      (*PostFuncP)(); ** The func to call when completed **
1015 **                      int      PostArg;          ** The arg for the func                      **
1016 ** };
1017 **
1018 ** You need to fill in ALL fields EXCEPT NextP, which is used to link the
1019 ** blocks together either on the free list or on the Rup list.
1020 **
1021 ** Packet is an actual packet structure to be filled in with the packet
1022 ** information associated with the command. You need to fill in everything,
1023 ** as the command processore doesn't process the command packet in any way.
1024 **
1025 ** The PreFuncP is called before the packet is enqueued on the host rup.
1026 ** PreFuncP is called as (*PreFuncP)(PreArg, CmdBlkP);. PreFuncP must
1027 ** return !RIO_FAIL to have the packet queued on the rup, and RIO_FAIL
1028 ** if the packet is NOT to be queued.
1029 **
1030 ** The PostFuncP is called when the command has completed. It is called
1031 ** as (*PostFuncP)(PostArg, CmdBlkP, txcontrol);. PostFuncP is not expected
1032 ** to return a value. PostFuncP does NOT need to free the command block,
1033 ** as this happens automatically after PostFuncP returns.
1034 **
1035 ** Once the command block has been filled in, it is attached to the correct
1036 ** queue by calling RIOQueueCmdBlk( HostP, Rup, CmdBlkP ) where HostP is
1037 ** a pointer to the struct Host, Rup is the NUMBER of the rup (NOT a pointer
1038 ** to it!), and CmdBlkP is the pointer to the command block allocated using
1039 ** RIOGetCmdBlk().
1040 **
1041 */