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