err.no Git - linux-2.6/blob - 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 #include <asm/uaccess.h>
  46
  47 #include <linux/termios.h>
  48 #include <linux/serial.h>
  49
  50 #include <linux/generic_serial.h>
  51
  52 #include "linux_compat.h"
  53 #include "rio_linux.h"
  54 #include "typdef.h"
  55 #include "pkt.h"
  56 #include "daemon.h"
  57 #include "rio.h"
  58 #include "riospace.h"
  59 #include "top.h"
  60 #include "cmdpkt.h"
  61 #include "map.h"
  62 #include "riotypes.h"
  63 #include "rup.h"
  64 #include "port.h"
  65 #include "riodrvr.h"
  66 #include "rioinfo.h"
  67 #include "func.h"
  68 #include "errors.h"
  69 #include "pci.h"
  70
  71 #include "parmmap.h"
  72 #include "unixrup.h"
  73 #include "board.h"
  74 #include "host.h"
  75 #include "error.h"
  76 #include "phb.h"
  77 #include "link.h"
  78 #include "cmdblk.h"
  79 #include "route.h"
  80 #include "control.h"
  81 #include "cirrus.h"
  82
  83
  84 static struct IdentifyRta IdRta;
  85 static struct KillNeighbour KillUnit;
  86
  87 int 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 RIOZombieRta(struct Host *HostP, struct Map *MapP)
 118 {
 119         struct CmdBlk *CmdBlkP;
 120
 121         rio_dprintk(RIO_DEBUG_CMD, "ZOMBIE RTA\n");
 122
 123         CmdBlkP = RIOGetCmdBlk();
 124
 125         if (!CmdBlkP) {
 126                 rio_dprintk(RIO_DEBUG_CMD, "ZOMBIE RTA: GetCmdBlk failed\n");
 127                 return -ENXIO;
 128         }
 129
 130         CmdBlkP->Packet.dest_unit = MapP->ID;
 131         CmdBlkP->Packet.dest_port = BOOT_RUP;
 132         CmdBlkP->Packet.src_unit = 0;
 133         CmdBlkP->Packet.src_port = BOOT_RUP;
 134         CmdBlkP->Packet.len = 0x84;
 135         CmdBlkP->Packet.data[0] = ZOMBIE;
 136         CmdBlkP->Packet.data[1] = 0;
 137         CmdBlkP->Packet.data[2] = ZOMBIE_MAGIC & 0xFF;
 138         CmdBlkP->Packet.data[3] = (ZOMBIE_MAGIC >> 8) & 0xFF;
 139
 140         if (RIOQueueCmdBlk(HostP, MapP->ID - 1, CmdBlkP) == RIO_FAIL) {
 141                 rio_dprintk(RIO_DEBUG_CMD, "ZOMBIE RTA: Failed to queue zombie command\n");
 142                 return -EIO;
 143         }
 144         return 0;
 145 }
 146
 147 int RIOCommandRta(struct rio_info *p, unsigned long RtaUnique, int (*func) (struct Host * HostP, struct Map * MapP))
 148 {
 149         unsigned int Host;
 150
 151         rio_dprintk(RIO_DEBUG_CMD, "Command RTA 0x%lx func 0x%p\n", RtaUnique, func);
 152
 153         if (!RtaUnique)
 154                 return (0);
 155
 156         for (Host = 0; Host < p->RIONumHosts; Host++) {
 157                 unsigned int Rta;
 158                 struct Host *HostP = &p->RIOHosts[Host];
 159
 160                 for (Rta = 0; Rta < RTAS_PER_HOST; Rta++) {
 161                         struct Map *MapP = &HostP->Mapping[Rta];
 162
 163                         if (MapP->RtaUniqueNum == RtaUnique) {
 164                                 uint Link;
 165
 166                                 /*
 167                                  ** now, lets just check we have a route to it...
 168                                  ** IF the routing stuff is working, then one of the
 169                                  ** topology entries for this unit will have a legit
 170                                  ** route *somewhere*. We care not where - if its got
 171                                  ** any connections, we can get to it.
 172                                  */
 173                                 for (Link = 0; Link < LINKS_PER_UNIT; Link++) {
 174                                         if (MapP->Topology[Link].Unit <= (u8) MAX_RUP) {
 175                                                 /*
 176                                                  ** Its worth trying the operation...
 177                                                  */
 178                                                 return (*func) (HostP, MapP);
 179                                         }
 180                                 }
 181                         }
 182                 }
 183         }
 184         return -ENXIO;
 185 }
 186
 187
 188 int RIOIdentifyRta(struct rio_info *p, void * arg)
 189 {
 190         unsigned int Host;
 191
 192         if (copy_from_user(&IdRta, arg, sizeof(IdRta))) {
 193                 rio_dprintk(RIO_DEBUG_CMD, "RIO_IDENTIFY_RTA copy failed\n");
 194                 p->RIOError.Error = COPYIN_FAILED;
 195                 return -EFAULT;
 196         }
 197
 198         for (Host = 0; Host < p->RIONumHosts; Host++) {
 199                 unsigned int Rta;
 200                 struct Host *HostP = &p->RIOHosts[Host];
 201
 202                 for (Rta = 0; Rta < RTAS_PER_HOST; Rta++) {
 203                         struct Map *MapP = &HostP->Mapping[Rta];
 204
 205                         if (MapP->RtaUniqueNum == IdRta.RtaUnique) {
 206                                 uint Link;
 207                                 /*
 208                                  ** now, lets just check we have a route to it...
 209                                  ** IF the routing stuff is working, then one of the
 210                                  ** topology entries for this unit will have a legit
 211                                  ** route *somewhere*. We care not where - if its got
 212                                  ** any connections, we can get to it.
 213                                  */
 214                                 for (Link = 0; Link < LINKS_PER_UNIT; Link++) {
 215                                         if (MapP->Topology[Link].Unit <= (u8) MAX_RUP) {
 216                                                 /*
 217                                                  ** Its worth trying the operation...
 218                                                  */
 219                                                 struct CmdBlk *CmdBlkP;
 220
 221                                                 rio_dprintk(RIO_DEBUG_CMD, "IDENTIFY RTA\n");
 222
 223                                                 CmdBlkP = RIOGetCmdBlk();
 224
 225                                                 if (!CmdBlkP) {
 226                                                         rio_dprintk(RIO_DEBUG_CMD, "IDENTIFY RTA: GetCmdBlk failed\n");
 227                                                         return -ENXIO;
 228                                                 }
 229
 230                                                 CmdBlkP->Packet.dest_unit = MapP->ID;
 231                                                 CmdBlkP->Packet.dest_port = BOOT_RUP;
 232                                                 CmdBlkP->Packet.src_unit = 0;
 233                                                 CmdBlkP->Packet.src_port = BOOT_RUP;
 234                                                 CmdBlkP->Packet.len = 0x84;
 235                                                 CmdBlkP->Packet.data[0] = IDENTIFY;
 236                                                 CmdBlkP->Packet.data[1] = 0;
 237                                                 CmdBlkP->Packet.data[2] = IdRta.ID;
 238
 239                                                 if (RIOQueueCmdBlk(HostP, MapP->ID - 1, CmdBlkP) == RIO_FAIL) {
 240                                                         rio_dprintk(RIO_DEBUG_CMD, "IDENTIFY RTA: Failed to queue command\n");
 241                                                         return -EIO;
 242                                                 }
 243                                                 return 0;
 244                                         }
 245                                 }
 246                         }
 247                 }
 248         }
 249         return -ENOENT;
 250 }
 251
 252
 253 int RIOKillNeighbour(struct rio_info *p, void * arg)
 254 {
 255         uint Host;
 256         uint ID;
 257         struct Host *HostP;
 258         struct CmdBlk *CmdBlkP;
 259
 260         rio_dprintk(RIO_DEBUG_CMD, "KILL HOST NEIGHBOUR\n");
 261
 262         if (copy_from_user(&KillUnit, arg, sizeof(KillUnit))) {
 263                 rio_dprintk(RIO_DEBUG_CMD, "RIO_KILL_NEIGHBOUR copy failed\n");
 264                 p->RIOError.Error = COPYIN_FAILED;
 265                 return -EFAULT;
 266         }
 267
 268         if (KillUnit.Link > 3)
 269                 return -ENXIO;
 270
 271         CmdBlkP = RIOGetCmdBlk();
 272
 273         if (!CmdBlkP) {
 274                 rio_dprintk(RIO_DEBUG_CMD, "UFOAD: GetCmdBlk failed\n");
 275                 return -ENXIO;
 276         }
 277
 278         CmdBlkP->Packet.dest_unit = 0;
 279         CmdBlkP->Packet.src_unit = 0;
 280         CmdBlkP->Packet.dest_port = BOOT_RUP;
 281         CmdBlkP->Packet.src_port = BOOT_RUP;
 282         CmdBlkP->Packet.len = 0x84;
 283         CmdBlkP->Packet.data[0] = UFOAD;
 284         CmdBlkP->Packet.data[1] = KillUnit.Link;
 285         CmdBlkP->Packet.data[2] = UFOAD_MAGIC & 0xFF;
 286         CmdBlkP->Packet.data[3] = (UFOAD_MAGIC >> 8) & 0xFF;
 287
 288         for (Host = 0; Host < p->RIONumHosts; Host++) {
 289                 ID = 0;
 290                 HostP = &p->RIOHosts[Host];
 291
 292                 if (HostP->UniqueNum == KillUnit.UniqueNum) {
 293                         if (RIOQueueCmdBlk(HostP, RTAS_PER_HOST + KillUnit.Link, CmdBlkP) == RIO_FAIL) {
 294                                 rio_dprintk(RIO_DEBUG_CMD, "UFOAD: Failed queue command\n");
 295                                 return -EIO;
 296                         }
 297                         return 0;
 298                 }
 299
 300                 for (ID = 0; ID < RTAS_PER_HOST; ID++) {
 301                         if (HostP->Mapping[ID].RtaUniqueNum == KillUnit.UniqueNum) {
 302                                 CmdBlkP->Packet.dest_unit = ID + 1;
 303                                 if (RIOQueueCmdBlk(HostP, ID, CmdBlkP) == RIO_FAIL) {
 304                                         rio_dprintk(RIO_DEBUG_CMD, "UFOAD: Failed queue command\n");
 305                                         return -EIO;
 306                                 }
 307                                 return 0;
 308                         }
 309                 }
 310         }
 311         RIOFreeCmdBlk(CmdBlkP);
 312         return -ENXIO;
 313 }
 314
 315 int RIOSuspendBootRta(struct Host *HostP, int ID, int Link)
 316 {
 317         struct CmdBlk *CmdBlkP;
 318
 319         rio_dprintk(RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA ID %d, link %c\n", ID, 'A' + Link);
 320
 321         CmdBlkP = RIOGetCmdBlk();
 322
 323         if (!CmdBlkP) {
 324                 rio_dprintk(RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: GetCmdBlk failed\n");
 325                 return -ENXIO;
 326         }
 327
 328         CmdBlkP->Packet.dest_unit = ID;
 329         CmdBlkP->Packet.dest_port = BOOT_RUP;
 330         CmdBlkP->Packet.src_unit = 0;
 331         CmdBlkP->Packet.src_port = BOOT_RUP;
 332         CmdBlkP->Packet.len = 0x84;
 333         CmdBlkP->Packet.data[0] = IWAIT;
 334         CmdBlkP->Packet.data[1] = Link;
 335         CmdBlkP->Packet.data[2] = IWAIT_MAGIC & 0xFF;
 336         CmdBlkP->Packet.data[3] = (IWAIT_MAGIC >> 8) & 0xFF;
 337
 338         if (RIOQueueCmdBlk(HostP, ID - 1, CmdBlkP) == RIO_FAIL) {
 339                 rio_dprintk(RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: Failed to queue iwait command\n");
 340                 return -EIO;
 341         }
 342         return 0;
 343 }
 344
 345 int RIOFoadWakeup(struct rio_info *p)
 346 {
 347         int port;
 348         struct Port *PortP;
 349         unsigned long flags;
 350
 351         for (port = 0; port < RIO_PORTS; port++) {
 352                 PortP = p->RIOPortp[port];
 353
 354                 rio_spin_lock_irqsave(&PortP->portSem, flags);
 355                 PortP->Config = 0;
 356                 PortP->State = 0;
 357                 PortP->InUse = NOT_INUSE;
 358                 PortP->PortState = 0;
 359                 PortP->FlushCmdBodge = 0;
 360                 PortP->ModemLines = 0;
 361                 PortP->ModemState = 0;
 362                 PortP->CookMode = 0;
 363                 PortP->ParamSem = 0;
 364                 PortP->Mapped = 0;
 365                 PortP->WflushFlag = 0;
 366                 PortP->MagicFlags = 0;
 367                 PortP->RxDataStart = 0;
 368                 PortP->TxBufferIn = 0;
 369                 PortP->TxBufferOut = 0;
 370                 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 371         }
 372         return (0);
 373 }
 374
 375 /*
 376 ** Incoming command on the COMMAND_RUP to be processed.
 377 */
 378 static int RIOCommandRup(struct rio_info *p, uint Rup, struct Host *HostP, PKT * PacketP)
 379 {
 380         struct PktCmd *PktCmdP = (struct PktCmd *) PacketP->data;
 381         struct Port *PortP;
 382         struct UnixRup *UnixRupP;
 383         unsigned short SysPort;
 384         unsigned short ReportedModemStatus;
 385         unsigned short rup;
 386         unsigned short subCommand;
 387         unsigned long flags;
 388
 389         func_enter();
 390
 391         /*
 392          ** 16 port RTA note:
 393          ** Command rup packets coming from the RTA will have pkt->data[1] (which
 394          ** translates to PktCmdP->PhbNum) set to the host port number for the
 395          ** particular unit. To access the correct BaseSysPort for a 16 port RTA,
 396          ** we can use PhbNum to get the rup number for the appropriate 8 port
 397          ** block (for the first block, this should be equal to 'Rup').
 398          */
 399         rup = readb(&PktCmdP->PhbNum) / (unsigned short) PORTS_PER_RTA;
 400         UnixRupP = &HostP->UnixRups[rup];
 401         SysPort = UnixRupP->BaseSysPort + (readb(&PktCmdP->PhbNum) % (unsigned short) PORTS_PER_RTA);
 402         rio_dprintk(RIO_DEBUG_CMD, "Command on rup %d, port %d\n", rup, SysPort);
 403
 404         if (UnixRupP->BaseSysPort == NO_PORT) {
 405                 rio_dprintk(RIO_DEBUG_CMD, "OBSCURE ERROR!\n");
 406                 rio_dprintk(RIO_DEBUG_CMD, "Diagnostics follow. Please WRITE THESE DOWN and report them to Specialix Technical Support\n");
 407                 rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: Host number %Zd, name ``%s''\n", HostP - p->RIOHosts, HostP->Name);
 408                 rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: Rup number  0x%x\n", rup);
 409
 410                 if (Rup >= (unsigned short) MAX_RUP) {
 411                         rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: This is the RUP for RTA ``%s''\n", HostP->Mapping[Rup].Name);
 412                 } else
 413                         rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: This is the RUP for link ``%c'' of host ``%s''\n", ('A' + Rup - MAX_RUP), HostP->Name);
 414
 415                 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Destination 0x%x:0x%x\n", PacketP->dest_unit, PacketP->dest_port);
 416                 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Source    0x%x:0x%x\n", PacketP->src_unit, PacketP->src_port);
 417                 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Length    0x%x (%d)\n", PacketP->len, PacketP->len);
 418                 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Control  0x%x (%d)\n", PacketP->control, PacketP->control);
 419                 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Check      0x%x (%d)\n", PacketP->csum, PacketP->csum);
 420                 rio_dprintk(RIO_DEBUG_CMD, "COMMAND information: Host Port Number 0x%x, " "Command Code 0x%x\n", PktCmdP->PhbNum, PktCmdP->Command);
 421                 return TRUE;
 422         }
 423         PortP = p->RIOPortp[SysPort];
 424         rio_spin_lock_irqsave(&PortP->portSem, flags);
 425         switch (readb(&PktCmdP->Command)) {
 426         case BREAK_RECEIVED:
 427                 rio_dprintk(RIO_DEBUG_CMD, "Received a break!\n");
 428                 /* If the current line disc. is not multi-threading and
 429                    the current processor is not the default, reset rup_intr
 430                    and return FALSE to ensure that the command packet is
 431                    not freed. */
 432                 /* Call tmgr HANGUP HERE */
 433                 /* Fix this later when every thing works !!!! RAMRAJ */
 434                 gs_got_break(&PortP->gs);
 435                 break;
 436
 437         case COMPLETE:
 438                 rio_dprintk(RIO_DEBUG_CMD, "Command complete on phb %d host %Zd\n", readb(&PktCmdP->PhbNum), HostP - p->RIOHosts);
 439                 subCommand = 1;
 440                 switch (readb(&PktCmdP->SubCommand)) {
 441                 case MEMDUMP:
 442                         rio_dprintk(RIO_DEBUG_CMD, "Memory dump cmd (0x%x) from addr 0x%x\n", readb(&PktCmdP->SubCommand), readw(&PktCmdP->SubAddr));
 443                         break;
 444                 case READ_REGISTER:
 445                         rio_dprintk(RIO_DEBUG_CMD, "Read register (0x%x)\n", readw(&PktCmdP->SubAddr));
 446                         p->CdRegister = (readb(&PktCmdP->ModemStatus) & MSVR1_HOST);
 447                         break;
 448                 default:
 449                         subCommand = 0;
 450                         break;
 451                 }
 452                 if (subCommand)
 453                         break;
 454                 rio_dprintk(RIO_DEBUG_CMD, "New status is 0x%x was 0x%x\n", readb(&PktCmdP->PortStatus), PortP->PortState);
 455                 if (PortP->PortState != readb(&PktCmdP->PortStatus)) {
 456                         rio_dprintk(RIO_DEBUG_CMD, "Mark status & wakeup\n");
 457                         PortP->PortState = readb(&PktCmdP->PortStatus);
 458                         /* What should we do here ...
 459                            wakeup( &PortP->PortState );
 460                          */
 461                 } else
 462                         rio_dprintk(RIO_DEBUG_CMD, "No change\n");
 463
 464                 /* FALLTHROUGH */
 465         case MODEM_STATUS:
 466                 /*
 467                  ** Knock out the tbusy and tstop bits, as these are not relevant
 468                  ** to the check for modem status change (they're just there because
 469                  ** it's a convenient place to put them!).
 470                  */
 471                 ReportedModemStatus = readb(&PktCmdP->ModemStatus);
 472                 if ((PortP->ModemState & MSVR1_HOST) == (ReportedModemStatus & MSVR1_HOST)) {
 473                         rio_dprintk(RIO_DEBUG_CMD, "Modem status unchanged 0x%x\n", PortP->ModemState);
 474                         /*
 475                          ** Update ModemState just in case tbusy or tstop states have
 476                          ** changed.
 477                          */
 478                         PortP->ModemState = ReportedModemStatus;
 479                 } else {
 480                         rio_dprintk(RIO_DEBUG_CMD, "Modem status change from 0x%x to 0x%x\n", PortP->ModemState, ReportedModemStatus);
 481                         PortP->ModemState = ReportedModemStatus;
 482 #ifdef MODEM_SUPPORT
 483                         if (PortP->Mapped) {
 484                                 /***********************************************************\
 485                                 *************************************************************
 486                                 ***                                                                                                        ***
 487                                 ***               M O D E M   S T A T E   C H A N G E             ***
 488                                 ***                                                                                                        ***
 489                                 *************************************************************
 490                                 \***********************************************************/
 491                                 /*
 492                                  ** If the device is a modem, then check the modem
 493                                  ** carrier.
 494                                  */
 495                                 if (PortP->gs.tty == NULL)
 496                                         break;
 497                                 if (PortP->gs.tty->termios == NULL)
 498                                         break;
 499
 500                                 if (!(PortP->gs.tty->termios->c_cflag & CLOCAL) && ((PortP->State & (RIO_MOPEN | RIO_WOPEN)))) {
 501
 502                                         rio_dprintk(RIO_DEBUG_CMD, "Is there a Carrier?\n");
 503                                         /*
 504                                          ** Is there a carrier?
 505                                          */
 506                                         if (PortP->ModemState & MSVR1_CD) {
 507                                                 /*
 508                                                  ** Has carrier just appeared?
 509                                                  */
 510                                                 if (!(PortP->State & RIO_CARR_ON)) {
 511                                                         rio_dprintk(RIO_DEBUG_CMD, "Carrier just came up.\n");
 512                                                         PortP->State |= RIO_CARR_ON;
 513                                                         /*
 514                                                          ** wakeup anyone in WOPEN
 515                                                          */
 516                                                         if (PortP->State & (PORT_ISOPEN | RIO_WOPEN))
 517                                                                 wake_up_interruptible(&PortP->gs.open_wait);
 518                                                 }
 519                                         } else {
 520                                                 /*
 521                                                  ** Has carrier just dropped?
 522                                                  */
 523                                                 if (PortP->State & RIO_CARR_ON) {
 524                                                         if (PortP->State & (PORT_ISOPEN | RIO_WOPEN | RIO_MOPEN))
 525                                                                 tty_hangup(PortP->gs.tty);
 526                                                         PortP->State &= ~RIO_CARR_ON;
 527                                                         rio_dprintk(RIO_DEBUG_CMD, "Carrirer just went down\n");
 528                                                 }
 529                                         }
 530                                 }
 531                         }
 532 #endif
 533                 }
 534                 break;
 535
 536         default:
 537                 rio_dprintk(RIO_DEBUG_CMD, "Unknown command %d on CMD_RUP of host %Zd\n", readb(&PktCmdP->Command), HostP - p->RIOHosts);
 538                 break;
 539         }
 540         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 541
 542         func_exit();
 543
 544         return TRUE;
 545 }
 546
 547 /*
 548 ** The command mechanism:
 549 **      Each rup has a chain of commands associated with it.
 550 **      This chain is maintained by routines in this file.
 551 **      Periodically we are called and we run a quick check of all the
 552 **      active chains to determine if there is a command to be executed,
 553 **      and if the rup is ready to accept it.
 554 **
 555 */
 556
 557 /*
 558 ** Allocate an empty command block.
 559 */
 560 struct CmdBlk *RIOGetCmdBlk(void)
 561 {
 562         struct CmdBlk *CmdBlkP;
 563
 564         CmdBlkP = (struct CmdBlk *)kmalloc(sizeof(struct CmdBlk), GFP_ATOMIC);
 565         if (CmdBlkP)
 566                 memset(CmdBlkP, 0, sizeof(struct CmdBlk));
 567         return CmdBlkP;
 568 }
 569
 570 /*
 571 ** Return a block to the head of the free list.
 572 */
 573 void RIOFreeCmdBlk(struct CmdBlk *CmdBlkP)
 574 {
 575         kfree(CmdBlkP);
 576 }
 577
 578 /*
 579 ** attach a command block to the list of commands to be performed for
 580 ** a given rup.
 581 */
 582 int RIOQueueCmdBlk(struct Host *HostP, uint Rup, struct CmdBlk *CmdBlkP)
 583 {
 584         struct CmdBlk **Base;
 585         struct UnixRup *UnixRupP;
 586         unsigned long flags;
 587
 588         if (Rup >= (unsigned short) (MAX_RUP + LINKS_PER_UNIT)) {
 589                 rio_dprintk(RIO_DEBUG_CMD, "Illegal rup number %d in RIOQueueCmdBlk\n", Rup);
 590                 RIOFreeCmdBlk(CmdBlkP);
 591                 return RIO_FAIL;
 592         }
 593
 594         UnixRupP = &HostP->UnixRups[Rup];
 595
 596         rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
 597
 598         /*
 599          ** If the RUP is currently inactive, then put the request
 600          ** straight on the RUP....
 601          */
 602         if ((UnixRupP->CmdsWaitingP == NULL) && (UnixRupP->CmdPendingP == NULL) && (readw(&UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE) && (CmdBlkP->PreFuncP ? (*CmdBlkP->PreFuncP) (CmdBlkP->PreArg, CmdBlkP)
 603                                                                                                                                              : TRUE)) {
 604                 rio_dprintk(RIO_DEBUG_CMD, "RUP inactive-placing command straight on. Cmd byte is 0x%x\n", CmdBlkP->Packet.data[0]);
 605
 606                 /*
 607                  ** Whammy! blat that pack!
 608                  */
 609                 HostP->Copy((caddr_t) & CmdBlkP->Packet, RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt), sizeof(PKT));
 610
 611                 /*
 612                  ** place command packet on the pending position.
 613                  */
 614                 UnixRupP->CmdPendingP = CmdBlkP;
 615
 616                 /*
 617                  ** set the command register
 618                  */
 619                 writew(TX_PACKET_READY, &UnixRupP->RupP->txcontrol);
 620
 621                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 622
 623                 return RIO_SUCCESS;
 624         }
 625         rio_dprintk(RIO_DEBUG_CMD, "RUP active - en-queing\n");
 626
 627         if (UnixRupP->CmdsWaitingP != NULL)
 628                 rio_dprintk(RIO_DEBUG_CMD, "Rup active - command waiting\n");
 629         if (UnixRupP->CmdPendingP != NULL)
 630                 rio_dprintk(RIO_DEBUG_CMD, "Rup active - command pending\n");
 631         if (readw(&UnixRupP->RupP->txcontrol) != TX_RUP_INACTIVE)
 632                 rio_dprintk(RIO_DEBUG_CMD, "Rup active - command rup not ready\n");
 633
 634         Base = &UnixRupP->CmdsWaitingP;
 635
 636         rio_dprintk(RIO_DEBUG_CMD, "First try to queue cmdblk 0x%p at 0x%p\n", CmdBlkP, Base);
 637
 638         while (*Base) {
 639                 rio_dprintk(RIO_DEBUG_CMD, "Command cmdblk 0x%p here\n", *Base);
 640                 Base = &((*Base)->NextP);
 641                 rio_dprintk(RIO_DEBUG_CMD, "Now try to queue cmd cmdblk 0x%p at 0x%p\n", CmdBlkP, Base);
 642         }
 643
 644         rio_dprintk(RIO_DEBUG_CMD, "Will queue cmdblk 0x%p at 0x%p\n", CmdBlkP, Base);
 645
 646         *Base = CmdBlkP;
 647
 648         CmdBlkP->NextP = NULL;
 649
 650         rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 651
 652         return RIO_SUCCESS;
 653 }
 654
 655 /*
 656 ** Here we go - if there is an empty rup, fill it!
 657 ** must be called at splrio() or higher.
 658 */
 659 void RIOPollHostCommands(struct rio_info *p, struct Host *HostP)
 660 {
 661         struct CmdBlk *CmdBlkP;
 662         struct UnixRup *UnixRupP;
 663         struct PKT *PacketP;
 664         unsigned short Rup;
 665         unsigned long flags;
 666
 667
 668         Rup = MAX_RUP + LINKS_PER_UNIT;
 669
 670         do {                    /* do this loop for each RUP */
 671                 /*
 672                  ** locate the rup we are processing & lock it
 673                  */
 674                 UnixRupP = &HostP->UnixRups[--Rup];
 675
 676                 spin_lock_irqsave(&UnixRupP->RupLock, flags);
 677
 678                 /*
 679                  ** First check for incoming commands:
 680                  */
 681                 if (readw(&UnixRupP->RupP->rxcontrol) != RX_RUP_INACTIVE) {
 682                         int FreeMe;
 683
 684                         PacketP = (PKT *) RIO_PTR(HostP->Caddr, readw(&UnixRupP->RupP->rxpkt));
 685
 686                         ShowPacket(DBG_CMD, PacketP);
 687
 688                         switch (readb(&PacketP->dest_port)) {
 689                         case BOOT_RUP:
 690                                 rio_dprintk(RIO_DEBUG_CMD, "Incoming Boot %s packet '%x'\n", readb(&PacketP->len) & 0x80 ? "Command" : "Data", readb(&PacketP->data[0]));
 691                                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 692                                 FreeMe = RIOBootRup(p, Rup, HostP, PacketP);
 693                                 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
 694                                 break;
 695
 696                         case COMMAND_RUP:
 697                                 /*
 698                                  ** Free the RUP lock as loss of carrier causes a
 699                                  ** ttyflush which will (eventually) call another
 700                                  ** routine that uses the RUP lock.
 701                                  */
 702                                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 703                                 FreeMe = RIOCommandRup(p, Rup, HostP, PacketP);
 704                                 if (PacketP->data[5] == MEMDUMP) {
 705                                         rio_dprintk(RIO_DEBUG_CMD, "Memdump from 0x%x complete\n", *(unsigned short *) & (PacketP->data[6]));
 706                                         HostP->Copy((caddr_t) & (PacketP->data[8]), (caddr_t) p->RIOMemDump, 32);
 707                                 }
 708                                 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
 709                                 break;
 710
 711                         case ROUTE_RUP:
 712                                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 713                                 FreeMe = RIORouteRup(p, Rup, HostP, PacketP);
 714                                 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
 715                                 break;
 716
 717                         default:
 718                                 rio_dprintk(RIO_DEBUG_CMD, "Unknown RUP %d\n", readb(&PacketP->dest_port));
 719                                 FreeMe = 1;
 720                                 break;
 721                         }
 722
 723                         if (FreeMe) {
 724                                 rio_dprintk(RIO_DEBUG_CMD, "Free processed incoming command packet\n");
 725                                 put_free_end(HostP, PacketP);
 726
 727                                 writew(RX_RUP_INACTIVE, &UnixRupP->RupP->rxcontrol);
 728
 729                                 if (readw(&UnixRupP->RupP->handshake) == PHB_HANDSHAKE_SET) {
 730                                         rio_dprintk(RIO_DEBUG_CMD, "Handshake rup %d\n", Rup);
 731                                         writew(PHB_HANDSHAKE_SET | PHB_HANDSHAKE_RESET, &UnixRupP->RupP->handshake);
 732                                 }
 733                         }
 734                 }
 735
 736                 /*
 737                  ** IF a command was running on the port,
 738                  ** and it has completed, then tidy it up.
 739                  */
 740                 if ((CmdBlkP = UnixRupP->CmdPendingP) &&        /* ASSIGN! */
 741                     (readw(&UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) {
 742                         /*
 743                          ** we are idle.
 744                          ** there is a command in pending.
 745                          ** Therefore, this command has finished.
 746                          ** So, wakeup whoever is waiting for it (and tell them
 747                          ** what happened).
 748                          */
 749                         if (CmdBlkP->Packet.dest_port == BOOT_RUP)
 750                                 rio_dprintk(RIO_DEBUG_CMD, "Free Boot %s Command Block '%x'\n", CmdBlkP->Packet.len & 0x80 ? "Command" : "Data", CmdBlkP->Packet.data[0]);
 751
 752                         rio_dprintk(RIO_DEBUG_CMD, "Command 0x%p completed\n", CmdBlkP);
 753
 754                         /*
 755                          ** Clear the Rup lock to prevent mutual exclusion.
 756                          */
 757                         if (CmdBlkP->PostFuncP) {
 758                                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 759                                 (*CmdBlkP->PostFuncP) (CmdBlkP->PostArg, CmdBlkP);
 760                                 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
 761                         }
 762
 763                         /*
 764                          ** ....clear the pending flag....
 765                          */
 766                         UnixRupP->CmdPendingP = NULL;
 767
 768                         /*
 769                          ** ....and return the command block to the freelist.
 770                          */
 771                         RIOFreeCmdBlk(CmdBlkP);
 772                 }
 773
 774                 /*
 775                  ** If there is a command for this rup, and the rup
 776                  ** is idle, then process the command
 777                  */
 778                 if ((CmdBlkP = UnixRupP->CmdsWaitingP) &&       /* ASSIGN! */
 779                     (UnixRupP->CmdPendingP == NULL) && (readw(&UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) {
 780                         /*
 781                          ** if the pre-function is non-zero, call it.
 782                          ** If it returns RIO_FAIL then don't
 783                          ** send this command yet!
 784                          */
 785                         if (!(CmdBlkP->PreFuncP ? (*CmdBlkP->PreFuncP) (CmdBlkP->PreArg, CmdBlkP) : TRUE)) {
 786                                 rio_dprintk(RIO_DEBUG_CMD, "Not ready to start command 0x%p\n", CmdBlkP);
 787                         } else {
 788                                 rio_dprintk(RIO_DEBUG_CMD, "Start new command 0x%p Cmd byte is 0x%x\n", CmdBlkP, CmdBlkP->Packet.data[0]);
 789                                 /*
 790                                  ** Whammy! blat that pack!
 791                                  */
 792                                 HostP->Copy((caddr_t) & CmdBlkP->Packet, RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt), sizeof(PKT));
 793
 794                                 /*
 795                                  ** remove the command from the rup command queue...
 796                                  */
 797                                 UnixRupP->CmdsWaitingP = CmdBlkP->NextP;
 798
 799                                 /*
 800                                  ** ...and place it on the pending position.
 801                                  */
 802                                 UnixRupP->CmdPendingP = CmdBlkP;
 803
 804                                 /*
 805                                  ** set the command register
 806                                  */
 807                                 writew(TX_PACKET_READY, &UnixRupP->RupP->txcontrol);
 808
 809                                 /*
 810                                  ** the command block will be freed
 811                                  ** when the command has been processed.
 812                                  */
 813                         }
 814                 }
 815                 spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 816         } while (Rup);
 817 }
 818
 819 int RIOWFlushMark(unsigned long iPortP, struct CmdBlk *CmdBlkP)
 820 {
 821         struct Port *PortP = (struct Port *) iPortP;
 822         unsigned long flags;
 823
 824         rio_spin_lock_irqsave(&PortP->portSem, flags);
 825         PortP->WflushFlag++;
 826         PortP->MagicFlags |= MAGIC_FLUSH;
 827         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 828         return RIOUnUse(iPortP, CmdBlkP);
 829 }
 830
 831 int RIORFlushEnable(unsigned long iPortP, struct CmdBlk *CmdBlkP)
 832 {
 833         struct Port *PortP = (struct Port *) iPortP;
 834         PKT *PacketP;
 835         unsigned long flags;
 836
 837         rio_spin_lock_irqsave(&PortP->portSem, flags);
 838
 839         while (can_remove_receive(&PacketP, PortP)) {
 840                 remove_receive(PortP);
 841                 ShowPacket(DBG_PROC, PacketP);
 842                 put_free_end(PortP->HostP, PacketP);
 843         }
 844
 845         if (readw(&PortP->PhbP->handshake) == PHB_HANDSHAKE_SET) {
 846                 /*
 847                  ** MAGIC! (Basically, handshake the RX buffer, so that
 848                  ** the RTAs upstream can be re-enabled.)
 849                  */
 850                 rio_dprintk(RIO_DEBUG_CMD, "Util: Set RX handshake bit\n");
 851                 writew(PHB_HANDSHAKE_SET | PHB_HANDSHAKE_RESET, &PortP->PhbP->handshake);
 852         }
 853         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 854         return RIOUnUse(iPortP, CmdBlkP);
 855 }
 856
 857 int RIOUnUse(unsigned long iPortP, struct CmdBlk *CmdBlkP)
 858 {
 859         struct Port *PortP = (struct Port *) iPortP;
 860         unsigned long flags;
 861
 862         rio_spin_lock_irqsave(&PortP->portSem, flags);
 863
 864         rio_dprintk(RIO_DEBUG_CMD, "Decrement in use count for port\n");
 865
 866         if (PortP->InUse) {
 867                 if (--PortP->InUse != NOT_INUSE) {
 868                         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 869                         return 0;
 870                 }
 871         }
 872         /*
 873          ** While PortP->InUse is set (i.e. a preemptive command has been sent to
 874          ** the RTA and is awaiting completion), any transmit data is prevented from
 875          ** being transferred from the write queue into the transmit packets
 876          ** (add_transmit) and no furthur transmit interrupt will be sent for that
 877          ** data. The next interrupt will occur up to 500ms later (RIOIntr is called
 878          ** twice a second as a saftey measure). This was the case when kermit was
 879          ** used to send data into a RIO port. After each packet was sent, TCFLSH
 880          ** was called to flush the read queue preemptively. PortP->InUse was
 881          ** incremented, thereby blocking the 6 byte acknowledgement packet
 882          ** transmitted back. This acknowledgment hung around for 500ms before
 883          ** being sent, thus reducing input performance substantially!.
 884          ** When PortP->InUse becomes NOT_INUSE, we must ensure that any data
 885          ** hanging around in the transmit buffer is sent immediately.
 886          */
 887         writew(1, &PortP->HostP->ParmMapP->tx_intr);
 888         /* What to do here ..
 889            wakeup( (caddr_t)&(PortP->InUse) );
 890          */
 891         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 892         return 0;
 893 }
 894
 895 void ShowPacket(uint Flags, struct PKT *PacketP)
 896 {
 897 }
 898
 899 /*
 900 **
 901 ** How to use this file:
 902 **
 903 ** To send a command down a rup, you need to allocate a command block, fill
 904 ** in the packet information, fill in the command number, fill in the pre-
 905 ** and post- functions and arguments, and then add the command block to the
 906 ** queue of command blocks for the port in question. When the port is idle,
 907 ** then the pre-function will be called. If this returns RIO_FAIL then the
 908 ** command will be re-queued and tried again at a later date (probably in one
 909 ** clock tick). If the pre-function returns NOT RIO_FAIL, then the command
 910 ** packet will be queued on the RUP, and the txcontrol field set to the
 911 ** command number. When the txcontrol field has changed from being the
 912 ** command number, then the post-function will be called, with the argument
 913 ** specified earlier, a pointer to the command block, and the value of
 914 ** txcontrol.
 915 **
 916 ** To allocate a command block, call RIOGetCmdBlk(). This returns a pointer
 917 ** to the command block structure allocated, or NULL if there aren't any.
 918 ** The block will have been zeroed for you.
 919 **
 920 ** The structure has the following fields:
 921 **
 922 ** struct CmdBlk
 923 ** {
 924 **       struct CmdBlk *NextP;            ** Pointer to next command block   **
 925 **       struct PKT      Packet;                ** A packet, to copy to the rup **
 926 **                      int      (*PreFuncP)();  ** The func to call to check if OK **
 927 **                      int      PreArg;                ** The arg for the func                 **
 928 **                      int      (*PostFuncP)(); ** The func to call when completed **
 929 **                      int      PostArg;          ** The arg for the func                      **
 930 ** };
 931 **
 932 ** You need to fill in ALL fields EXCEPT NextP, which is used to link the
 933 ** blocks together either on the free list or on the Rup list.
 934 **
 935 ** Packet is an actual packet structure to be filled in with the packet
 936 ** information associated with the command. You need to fill in everything,
 937 ** as the command processore doesn't process the command packet in any way.
 938 **
 939 ** The PreFuncP is called before the packet is enqueued on the host rup.
 940 ** PreFuncP is called as (*PreFuncP)(PreArg, CmdBlkP);. PreFuncP must
 941 ** return !RIO_FAIL to have the packet queued on the rup, and RIO_FAIL
 942 ** if the packet is NOT to be queued.
 943 **
 944 ** The PostFuncP is called when the command has completed. It is called
 945 ** as (*PostFuncP)(PostArg, CmdBlkP, txcontrol);. PostFuncP is not expected
 946 ** to return a value. PostFuncP does NOT need to free the command block,
 947 ** as this happens automatically after PostFuncP returns.
 948 **
 949 ** Once the command block has been filled in, it is attached to the correct
 950 ** queue by calling RIOQueueCmdBlk( HostP, Rup, CmdBlkP ) where HostP is
 951 ** a pointer to the struct Host, Rup is the NUMBER of the rup (NOT a pointer
 952 ** to it!), and CmdBlkP is the pointer to the command block allocated using
 953 ** RIOGetCmdBlk().
 954 **
 955 */