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   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
  34 #include <linux/module.h>
  35 #include <linux/sched.h>
  36 #include <linux/slab.h>
  37 #include <linux/errno.h>
  38 #include <linux/tty.h>
  39 #include <asm/io.h>
  40 #include <asm/system.h>
  41 #include <asm/string.h>
  42 #include <asm/uaccess.h>
  43
  44 #include <linux/termios.h>
  45 #include <linux/serial.h>
  46
  47 #include <linux/generic_serial.h>
  48
  49 #include "linux_compat.h"
  50 #include "rio_linux.h"
  51 #include "pkt.h"
  52 #include "daemon.h"
  53 #include "rio.h"
  54 #include "riospace.h"
  55 #include "cmdpkt.h"
  56 #include "map.h"
  57 #include "rup.h"
  58 #include "port.h"
  59 #include "riodrvr.h"
  60 #include "rioinfo.h"
  61 #include "func.h"
  62 #include "errors.h"
  63 #include "pci.h"
  64
  65 #include "parmmap.h"
  66 #include "unixrup.h"
  67 #include "board.h"
  68 #include "host.h"
  69 #include "phb.h"
  70 #include "link.h"
  71 #include "cmdblk.h"
  72 #include "route.h"
  73 #include "cirrus.h"
  74
  75
  76 static struct IdentifyRta IdRta;
  77 static struct KillNeighbour KillUnit;
  78
  79 int RIOFoadRta(struct Host *HostP, struct Map *MapP)
  80 {
  81         struct CmdBlk *CmdBlkP;
  82
  83         rio_dprintk(RIO_DEBUG_CMD, "FOAD RTA\n");
  84
  85         CmdBlkP = RIOGetCmdBlk();
  86
  87         if (!CmdBlkP) {
  88                 rio_dprintk(RIO_DEBUG_CMD, "FOAD RTA: GetCmdBlk failed\n");
  89                 return -ENXIO;
  90         }
  91
  92         CmdBlkP->Packet.dest_unit = MapP->ID;
  93         CmdBlkP->Packet.dest_port = BOOT_RUP;
  94         CmdBlkP->Packet.src_unit = 0;
  95         CmdBlkP->Packet.src_port = BOOT_RUP;
  96         CmdBlkP->Packet.len = 0x84;
  97         CmdBlkP->Packet.data[0] = IFOAD;
  98         CmdBlkP->Packet.data[1] = 0;
  99         CmdBlkP->Packet.data[2] = IFOAD_MAGIC & 0xFF;
 100         CmdBlkP->Packet.data[3] = (IFOAD_MAGIC >> 8) & 0xFF;
 101
 102         if (RIOQueueCmdBlk(HostP, MapP->ID - 1, CmdBlkP) == RIO_FAIL) {
 103                 rio_dprintk(RIO_DEBUG_CMD, "FOAD RTA: Failed to queue foad command\n");
 104                 return -EIO;
 105         }
 106         return 0;
 107 }
 108
 109 int RIOZombieRta(struct Host *HostP, struct Map *MapP)
 110 {
 111         struct CmdBlk *CmdBlkP;
 112
 113         rio_dprintk(RIO_DEBUG_CMD, "ZOMBIE RTA\n");
 114
 115         CmdBlkP = RIOGetCmdBlk();
 116
 117         if (!CmdBlkP) {
 118                 rio_dprintk(RIO_DEBUG_CMD, "ZOMBIE RTA: GetCmdBlk failed\n");
 119                 return -ENXIO;
 120         }
 121
 122         CmdBlkP->Packet.dest_unit = MapP->ID;
 123         CmdBlkP->Packet.dest_port = BOOT_RUP;
 124         CmdBlkP->Packet.src_unit = 0;
 125         CmdBlkP->Packet.src_port = BOOT_RUP;
 126         CmdBlkP->Packet.len = 0x84;
 127         CmdBlkP->Packet.data[0] = ZOMBIE;
 128         CmdBlkP->Packet.data[1] = 0;
 129         CmdBlkP->Packet.data[2] = ZOMBIE_MAGIC & 0xFF;
 130         CmdBlkP->Packet.data[3] = (ZOMBIE_MAGIC >> 8) & 0xFF;
 131
 132         if (RIOQueueCmdBlk(HostP, MapP->ID - 1, CmdBlkP) == RIO_FAIL) {
 133                 rio_dprintk(RIO_DEBUG_CMD, "ZOMBIE RTA: Failed to queue zombie command\n");
 134                 return -EIO;
 135         }
 136         return 0;
 137 }
 138
 139 int RIOCommandRta(struct rio_info *p, unsigned long RtaUnique, int (*func) (struct Host * HostP, struct Map * MapP))
 140 {
 141         unsigned int Host;
 142
 143         rio_dprintk(RIO_DEBUG_CMD, "Command RTA 0x%lx func %p\n", RtaUnique, func);
 144
 145         if (!RtaUnique)
 146                 return (0);
 147
 148         for (Host = 0; Host < p->RIONumHosts; Host++) {
 149                 unsigned int Rta;
 150                 struct Host *HostP = &p->RIOHosts[Host];
 151
 152                 for (Rta = 0; Rta < RTAS_PER_HOST; Rta++) {
 153                         struct Map *MapP = &HostP->Mapping[Rta];
 154
 155                         if (MapP->RtaUniqueNum == RtaUnique) {
 156                                 uint Link;
 157
 158                                 /*
 159                                  ** now, lets just check we have a route to it...
 160                                  ** IF the routing stuff is working, then one of the
 161                                  ** topology entries for this unit will have a legit
 162                                  ** route *somewhere*. We care not where - if its got
 163                                  ** any connections, we can get to it.
 164                                  */
 165                                 for (Link = 0; Link < LINKS_PER_UNIT; Link++) {
 166                                         if (MapP->Topology[Link].Unit <= (u8) MAX_RUP) {
 167                                                 /*
 168                                                  ** Its worth trying the operation...
 169                                                  */
 170                                                 return (*func) (HostP, MapP);
 171                                         }
 172                                 }
 173                         }
 174                 }
 175         }
 176         return -ENXIO;
 177 }
 178
 179
 180 int RIOIdentifyRta(struct rio_info *p, void __user * arg)
 181 {
 182         unsigned int Host;
 183
 184         if (copy_from_user(&IdRta, arg, sizeof(IdRta))) {
 185                 rio_dprintk(RIO_DEBUG_CMD, "RIO_IDENTIFY_RTA copy failed\n");
 186                 p->RIOError.Error = COPYIN_FAILED;
 187                 return -EFAULT;
 188         }
 189
 190         for (Host = 0; Host < p->RIONumHosts; Host++) {
 191                 unsigned int Rta;
 192                 struct Host *HostP = &p->RIOHosts[Host];
 193
 194                 for (Rta = 0; Rta < RTAS_PER_HOST; Rta++) {
 195                         struct Map *MapP = &HostP->Mapping[Rta];
 196
 197                         if (MapP->RtaUniqueNum == IdRta.RtaUnique) {
 198                                 uint Link;
 199                                 /*
 200                                  ** now, lets just check we have a route to it...
 201                                  ** IF the routing stuff is working, then one of the
 202                                  ** topology entries for this unit will have a legit
 203                                  ** route *somewhere*. We care not where - if its got
 204                                  ** any connections, we can get to it.
 205                                  */
 206                                 for (Link = 0; Link < LINKS_PER_UNIT; Link++) {
 207                                         if (MapP->Topology[Link].Unit <= (u8) MAX_RUP) {
 208                                                 /*
 209                                                  ** Its worth trying the operation...
 210                                                  */
 211                                                 struct CmdBlk *CmdBlkP;
 212
 213                                                 rio_dprintk(RIO_DEBUG_CMD, "IDENTIFY RTA\n");
 214
 215                                                 CmdBlkP = RIOGetCmdBlk();
 216
 217                                                 if (!CmdBlkP) {
 218                                                         rio_dprintk(RIO_DEBUG_CMD, "IDENTIFY RTA: GetCmdBlk failed\n");
 219                                                         return -ENXIO;
 220                                                 }
 221
 222                                                 CmdBlkP->Packet.dest_unit = MapP->ID;
 223                                                 CmdBlkP->Packet.dest_port = BOOT_RUP;
 224                                                 CmdBlkP->Packet.src_unit = 0;
 225                                                 CmdBlkP->Packet.src_port = BOOT_RUP;
 226                                                 CmdBlkP->Packet.len = 0x84;
 227                                                 CmdBlkP->Packet.data[0] = IDENTIFY;
 228                                                 CmdBlkP->Packet.data[1] = 0;
 229                                                 CmdBlkP->Packet.data[2] = IdRta.ID;
 230
 231                                                 if (RIOQueueCmdBlk(HostP, MapP->ID - 1, CmdBlkP) == RIO_FAIL) {
 232                                                         rio_dprintk(RIO_DEBUG_CMD, "IDENTIFY RTA: Failed to queue command\n");
 233                                                         return -EIO;
 234                                                 }
 235                                                 return 0;
 236                                         }
 237                                 }
 238                         }
 239                 }
 240         }
 241         return -ENOENT;
 242 }
 243
 244
 245 int RIOKillNeighbour(struct rio_info *p, void __user * arg)
 246 {
 247         uint Host;
 248         uint ID;
 249         struct Host *HostP;
 250         struct CmdBlk *CmdBlkP;
 251
 252         rio_dprintk(RIO_DEBUG_CMD, "KILL HOST NEIGHBOUR\n");
 253
 254         if (copy_from_user(&KillUnit, arg, sizeof(KillUnit))) {
 255                 rio_dprintk(RIO_DEBUG_CMD, "RIO_KILL_NEIGHBOUR copy failed\n");
 256                 p->RIOError.Error = COPYIN_FAILED;
 257                 return -EFAULT;
 258         }
 259
 260         if (KillUnit.Link > 3)
 261                 return -ENXIO;
 262
 263         CmdBlkP = RIOGetCmdBlk();
 264
 265         if (!CmdBlkP) {
 266                 rio_dprintk(RIO_DEBUG_CMD, "UFOAD: GetCmdBlk failed\n");
 267                 return -ENXIO;
 268         }
 269
 270         CmdBlkP->Packet.dest_unit = 0;
 271         CmdBlkP->Packet.src_unit = 0;
 272         CmdBlkP->Packet.dest_port = BOOT_RUP;
 273         CmdBlkP->Packet.src_port = BOOT_RUP;
 274         CmdBlkP->Packet.len = 0x84;
 275         CmdBlkP->Packet.data[0] = UFOAD;
 276         CmdBlkP->Packet.data[1] = KillUnit.Link;
 277         CmdBlkP->Packet.data[2] = UFOAD_MAGIC & 0xFF;
 278         CmdBlkP->Packet.data[3] = (UFOAD_MAGIC >> 8) & 0xFF;
 279
 280         for (Host = 0; Host < p->RIONumHosts; Host++) {
 281                 ID = 0;
 282                 HostP = &p->RIOHosts[Host];
 283
 284                 if (HostP->UniqueNum == KillUnit.UniqueNum) {
 285                         if (RIOQueueCmdBlk(HostP, RTAS_PER_HOST + KillUnit.Link, CmdBlkP) == RIO_FAIL) {
 286                                 rio_dprintk(RIO_DEBUG_CMD, "UFOAD: Failed queue command\n");
 287                                 return -EIO;
 288                         }
 289                         return 0;
 290                 }
 291
 292                 for (ID = 0; ID < RTAS_PER_HOST; ID++) {
 293                         if (HostP->Mapping[ID].RtaUniqueNum == KillUnit.UniqueNum) {
 294                                 CmdBlkP->Packet.dest_unit = ID + 1;
 295                                 if (RIOQueueCmdBlk(HostP, ID, CmdBlkP) == RIO_FAIL) {
 296                                         rio_dprintk(RIO_DEBUG_CMD, "UFOAD: Failed queue command\n");
 297                                         return -EIO;
 298                                 }
 299                                 return 0;
 300                         }
 301                 }
 302         }
 303         RIOFreeCmdBlk(CmdBlkP);
 304         return -ENXIO;
 305 }
 306
 307 int RIOSuspendBootRta(struct Host *HostP, int ID, int Link)
 308 {
 309         struct CmdBlk *CmdBlkP;
 310
 311         rio_dprintk(RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA ID %d, link %c\n", ID, 'A' + Link);
 312
 313         CmdBlkP = RIOGetCmdBlk();
 314
 315         if (!CmdBlkP) {
 316                 rio_dprintk(RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: GetCmdBlk failed\n");
 317                 return -ENXIO;
 318         }
 319
 320         CmdBlkP->Packet.dest_unit = ID;
 321         CmdBlkP->Packet.dest_port = BOOT_RUP;
 322         CmdBlkP->Packet.src_unit = 0;
 323         CmdBlkP->Packet.src_port = BOOT_RUP;
 324         CmdBlkP->Packet.len = 0x84;
 325         CmdBlkP->Packet.data[0] = IWAIT;
 326         CmdBlkP->Packet.data[1] = Link;
 327         CmdBlkP->Packet.data[2] = IWAIT_MAGIC & 0xFF;
 328         CmdBlkP->Packet.data[3] = (IWAIT_MAGIC >> 8) & 0xFF;
 329
 330         if (RIOQueueCmdBlk(HostP, ID - 1, CmdBlkP) == RIO_FAIL) {
 331                 rio_dprintk(RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: Failed to queue iwait command\n");
 332                 return -EIO;
 333         }
 334         return 0;
 335 }
 336
 337 int RIOFoadWakeup(struct rio_info *p)
 338 {
 339         int port;
 340         struct Port *PortP;
 341         unsigned long flags;
 342
 343         for (port = 0; port < RIO_PORTS; port++) {
 344                 PortP = p->RIOPortp[port];
 345
 346                 rio_spin_lock_irqsave(&PortP->portSem, flags);
 347                 PortP->Config = 0;
 348                 PortP->State = 0;
 349                 PortP->InUse = NOT_INUSE;
 350                 PortP->PortState = 0;
 351                 PortP->FlushCmdBodge = 0;
 352                 PortP->ModemLines = 0;
 353                 PortP->ModemState = 0;
 354                 PortP->CookMode = 0;
 355                 PortP->ParamSem = 0;
 356                 PortP->Mapped = 0;
 357                 PortP->WflushFlag = 0;
 358                 PortP->MagicFlags = 0;
 359                 PortP->RxDataStart = 0;
 360                 PortP->TxBufferIn = 0;
 361                 PortP->TxBufferOut = 0;
 362                 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 363         }
 364         return (0);
 365 }
 366
 367 /*
 368 ** Incoming command on the COMMAND_RUP to be processed.
 369 */
 370 static int RIOCommandRup(struct rio_info *p, uint Rup, struct Host *HostP, struct PKT __iomem *PacketP)
 371 {
 372         struct PktCmd __iomem *PktCmdP = (struct PktCmd __iomem *)PacketP->data;
 373         struct Port *PortP;
 374         struct UnixRup *UnixRupP;
 375         unsigned short SysPort;
 376         unsigned short ReportedModemStatus;
 377         unsigned short rup;
 378         unsigned short subCommand;
 379         unsigned long flags;
 380
 381         func_enter();
 382
 383         /*
 384          ** 16 port RTA note:
 385          ** Command rup packets coming from the RTA will have pkt->data[1] (which
 386          ** translates to PktCmdP->PhbNum) set to the host port number for the
 387          ** particular unit. To access the correct BaseSysPort for a 16 port RTA,
 388          ** we can use PhbNum to get the rup number for the appropriate 8 port
 389          ** block (for the first block, this should be equal to 'Rup').
 390          */
 391         rup = readb(&PktCmdP->PhbNum) / (unsigned short) PORTS_PER_RTA;
 392         UnixRupP = &HostP->UnixRups[rup];
 393         SysPort = UnixRupP->BaseSysPort + (readb(&PktCmdP->PhbNum) % (unsigned short) PORTS_PER_RTA);
 394         rio_dprintk(RIO_DEBUG_CMD, "Command on rup %d, port %d\n", rup, SysPort);
 395
 396         if (UnixRupP->BaseSysPort == NO_PORT) {
 397                 rio_dprintk(RIO_DEBUG_CMD, "OBSCURE ERROR!\n");
 398                 rio_dprintk(RIO_DEBUG_CMD, "Diagnostics follow. Please WRITE THESE DOWN and report them to Specialix Technical Support\n");
 399                 rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: Host number %Zd, name ``%s''\n", HostP - p->RIOHosts, HostP->Name);
 400                 rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: Rup number  0x%x\n", rup);
 401
 402                 if (Rup < (unsigned short) MAX_RUP) {
 403                         rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: This is the RUP for RTA ``%s''\n", HostP->Mapping[Rup].Name);
 404                 } else
 405                         rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: This is the RUP for link ``%c'' of host ``%s''\n", ('A' + Rup - MAX_RUP), HostP->Name);
 406
 407                 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Destination 0x%x:0x%x\n", readb(&PacketP->dest_unit), readb(&PacketP->dest_port));
 408                 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Source    0x%x:0x%x\n", readb(&PacketP->src_unit), readb(&PacketP->src_port));
 409                 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Length    0x%x (%d)\n", readb(&PacketP->len), readb(&PacketP->len));
 410                 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Control  0x%x (%d)\n", readb(&PacketP->control), readb(&PacketP->control));
 411                 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Check      0x%x (%d)\n", readw(&PacketP->csum), readw(&PacketP->csum));
 412                 rio_dprintk(RIO_DEBUG_CMD, "COMMAND information: Host Port Number 0x%x, " "Command Code 0x%x\n", readb(&PktCmdP->PhbNum), readb(&PktCmdP->Command));
 413                 return 1;
 414         }
 415         PortP = p->RIOPortp[SysPort];
 416         rio_spin_lock_irqsave(&PortP->portSem, flags);
 417         switch (readb(&PktCmdP->Command)) {
 418         case RIOC_BREAK_RECEIVED:
 419                 rio_dprintk(RIO_DEBUG_CMD, "Received a break!\n");
 420                 /* If the current line disc. is not multi-threading and
 421                    the current processor is not the default, reset rup_intr
 422                    and return 0 to ensure that the command packet is
 423                    not freed. */
 424                 /* Call tmgr HANGUP HERE */
 425                 /* Fix this later when every thing works !!!! RAMRAJ */
 426                 gs_got_break(&PortP->gs);
 427                 break;
 428
 429         case RIOC_COMPLETE:
 430                 rio_dprintk(RIO_DEBUG_CMD, "Command complete on phb %d host %Zd\n", readb(&PktCmdP->PhbNum), HostP - p->RIOHosts);
 431                 subCommand = 1;
 432                 switch (readb(&PktCmdP->SubCommand)) {
 433                 case RIOC_MEMDUMP:
 434                         rio_dprintk(RIO_DEBUG_CMD, "Memory dump cmd (0x%x) from addr 0x%x\n", readb(&PktCmdP->SubCommand), readw(&PktCmdP->SubAddr));
 435                         break;
 436                 case RIOC_READ_REGISTER:
 437                         rio_dprintk(RIO_DEBUG_CMD, "Read register (0x%x)\n", readw(&PktCmdP->SubAddr));
 438                         p->CdRegister = (readb(&PktCmdP->ModemStatus) & RIOC_MSVR1_HOST);
 439                         break;
 440                 default:
 441                         subCommand = 0;
 442                         break;
 443                 }
 444                 if (subCommand)
 445                         break;
 446                 rio_dprintk(RIO_DEBUG_CMD, "New status is 0x%x was 0x%x\n", readb(&PktCmdP->PortStatus), PortP->PortState);
 447                 if (PortP->PortState != readb(&PktCmdP->PortStatus)) {
 448                         rio_dprintk(RIO_DEBUG_CMD, "Mark status & wakeup\n");
 449                         PortP->PortState = readb(&PktCmdP->PortStatus);
 450                         /* What should we do here ...
 451                            wakeup( &PortP->PortState );
 452                          */
 453                 } else
 454                         rio_dprintk(RIO_DEBUG_CMD, "No change\n");
 455
 456                 /* FALLTHROUGH */
 457         case RIOC_MODEM_STATUS:
 458                 /*
 459                  ** Knock out the tbusy and tstop bits, as these are not relevant
 460                  ** to the check for modem status change (they're just there because
 461                  ** it's a convenient place to put them!).
 462                  */
 463                 ReportedModemStatus = readb(&PktCmdP->ModemStatus);
 464                 if ((PortP->ModemState & RIOC_MSVR1_HOST) ==
 465                                 (ReportedModemStatus & RIOC_MSVR1_HOST)) {
 466                         rio_dprintk(RIO_DEBUG_CMD, "Modem status unchanged 0x%x\n", PortP->ModemState);
 467                         /*
 468                          ** Update ModemState just in case tbusy or tstop states have
 469                          ** changed.
 470                          */
 471                         PortP->ModemState = ReportedModemStatus;
 472                 } else {
 473                         rio_dprintk(RIO_DEBUG_CMD, "Modem status change from 0x%x to 0x%x\n", PortP->ModemState, ReportedModemStatus);
 474                         PortP->ModemState = ReportedModemStatus;
 475 #ifdef MODEM_SUPPORT
 476                         if (PortP->Mapped) {
 477                                 /***********************************************************\
 478                                 *************************************************************
 479                                 ***                                                                                                        ***
 480                                 ***               M O D E M   S T A T E   C H A N G E             ***
 481                                 ***                                                                                                        ***
 482                                 *************************************************************
 483                                 \***********************************************************/
 484                                 /*
 485                                  ** If the device is a modem, then check the modem
 486                                  ** carrier.
 487                                  */
 488                                 if (PortP->gs.port.tty == NULL)
 489                                         break;
 490                                 if (PortP->gs.port.tty->termios == NULL)
 491                                         break;
 492
 493                                 if (!(PortP->gs.port.tty->termios->c_cflag & CLOCAL) && ((PortP->State & (RIO_MOPEN | RIO_WOPEN)))) {
 494
 495                                         rio_dprintk(RIO_DEBUG_CMD, "Is there a Carrier?\n");
 496                                         /*
 497                                          ** Is there a carrier?
 498                                          */
 499                                         if (PortP->ModemState & RIOC_MSVR1_CD) {
 500                                                 /*
 501                                                  ** Has carrier just appeared?
 502                                                  */
 503                                                 if (!(PortP->State & RIO_CARR_ON)) {
 504                                                         rio_dprintk(RIO_DEBUG_CMD, "Carrier just came up.\n");
 505                                                         PortP->State |= RIO_CARR_ON;
 506                                                         /*
 507                                                          ** wakeup anyone in WOPEN
 508                                                          */
 509                                                         if (PortP->State & (PORT_ISOPEN | RIO_WOPEN))
 510                                                                 wake_up_interruptible(&PortP->gs.port.open_wait);
 511                                                 }
 512                                         } else {
 513                                                 /*
 514                                                  ** Has carrier just dropped?
 515                                                  */
 516                                                 if (PortP->State & RIO_CARR_ON) {
 517                                                         if (PortP->State & (PORT_ISOPEN | RIO_WOPEN | RIO_MOPEN))
 518                                                                 tty_hangup(PortP->gs.port.tty);
 519                                                         PortP->State &= ~RIO_CARR_ON;
 520                                                         rio_dprintk(RIO_DEBUG_CMD, "Carrirer just went down\n");
 521                                                 }
 522                                         }
 523                                 }
 524                         }
 525 #endif
 526                 }
 527                 break;
 528
 529         default:
 530                 rio_dprintk(RIO_DEBUG_CMD, "Unknown command %d on CMD_RUP of host %Zd\n", readb(&PktCmdP->Command), HostP - p->RIOHosts);
 531                 break;
 532         }
 533         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 534
 535         func_exit();
 536
 537         return 1;
 538 }
 539
 540 /*
 541 ** The command mechanism:
 542 **      Each rup has a chain of commands associated with it.
 543 **      This chain is maintained by routines in this file.
 544 **      Periodically we are called and we run a quick check of all the
 545 **      active chains to determine if there is a command to be executed,
 546 **      and if the rup is ready to accept it.
 547 **
 548 */
 549
 550 /*
 551 ** Allocate an empty command block.
 552 */
 553 struct CmdBlk *RIOGetCmdBlk(void)
 554 {
 555         struct CmdBlk *CmdBlkP;
 556
 557         CmdBlkP = kzalloc(sizeof(struct CmdBlk), GFP_ATOMIC);
 558         return CmdBlkP;
 559 }
 560
 561 /*
 562 ** Return a block to the head of the free list.
 563 */
 564 void RIOFreeCmdBlk(struct CmdBlk *CmdBlkP)
 565 {
 566         kfree(CmdBlkP);
 567 }
 568
 569 /*
 570 ** attach a command block to the list of commands to be performed for
 571 ** a given rup.
 572 */
 573 int RIOQueueCmdBlk(struct Host *HostP, uint Rup, struct CmdBlk *CmdBlkP)
 574 {
 575         struct CmdBlk **Base;
 576         struct UnixRup *UnixRupP;
 577         unsigned long flags;
 578
 579         if (Rup >= (unsigned short) (MAX_RUP + LINKS_PER_UNIT)) {
 580                 rio_dprintk(RIO_DEBUG_CMD, "Illegal rup number %d in RIOQueueCmdBlk\n", Rup);
 581                 RIOFreeCmdBlk(CmdBlkP);
 582                 return RIO_FAIL;
 583         }
 584
 585         UnixRupP = &HostP->UnixRups[Rup];
 586
 587         rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
 588
 589         /*
 590          ** If the RUP is currently inactive, then put the request
 591          ** straight on the RUP....
 592          */
 593         if ((UnixRupP->CmdsWaitingP == NULL) && (UnixRupP->CmdPendingP == NULL) && (readw(&UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE) && (CmdBlkP->PreFuncP ? (*CmdBlkP->PreFuncP) (CmdBlkP->PreArg, CmdBlkP)
 594                                                                                                                                              : 1)) {
 595                 rio_dprintk(RIO_DEBUG_CMD, "RUP inactive-placing command straight on. Cmd byte is 0x%x\n", CmdBlkP->Packet.data[0]);
 596
 597                 /*
 598                  ** Whammy! blat that pack!
 599                  */
 600                 HostP->Copy(&CmdBlkP->Packet, RIO_PTR(HostP->Caddr, readw(&UnixRupP->RupP->txpkt)), sizeof(struct PKT));
 601
 602                 /*
 603                  ** place command packet on the pending position.
 604                  */
 605                 UnixRupP->CmdPendingP = CmdBlkP;
 606
 607                 /*
 608                  ** set the command register
 609                  */
 610                 writew(TX_PACKET_READY, &UnixRupP->RupP->txcontrol);
 611
 612                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 613
 614                 return 0;
 615         }
 616         rio_dprintk(RIO_DEBUG_CMD, "RUP active - en-queing\n");
 617
 618         if (UnixRupP->CmdsWaitingP != NULL)
 619                 rio_dprintk(RIO_DEBUG_CMD, "Rup active - command waiting\n");
 620         if (UnixRupP->CmdPendingP != NULL)
 621                 rio_dprintk(RIO_DEBUG_CMD, "Rup active - command pending\n");
 622         if (readw(&UnixRupP->RupP->txcontrol) != TX_RUP_INACTIVE)
 623                 rio_dprintk(RIO_DEBUG_CMD, "Rup active - command rup not ready\n");
 624
 625         Base = &UnixRupP->CmdsWaitingP;
 626
 627         rio_dprintk(RIO_DEBUG_CMD, "First try to queue cmdblk %p at %p\n", CmdBlkP, Base);
 628
 629         while (*Base) {
 630                 rio_dprintk(RIO_DEBUG_CMD, "Command cmdblk %p here\n", *Base);
 631                 Base = &((*Base)->NextP);
 632                 rio_dprintk(RIO_DEBUG_CMD, "Now try to queue cmd cmdblk %p at %p\n", CmdBlkP, Base);
 633         }
 634
 635         rio_dprintk(RIO_DEBUG_CMD, "Will queue cmdblk %p at %p\n", CmdBlkP, Base);
 636
 637         *Base = CmdBlkP;
 638
 639         CmdBlkP->NextP = NULL;
 640
 641         rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 642
 643         return 0;
 644 }
 645
 646 /*
 647 ** Here we go - if there is an empty rup, fill it!
 648 ** must be called at splrio() or higher.
 649 */
 650 void RIOPollHostCommands(struct rio_info *p, struct Host *HostP)
 651 {
 652         struct CmdBlk *CmdBlkP;
 653         struct UnixRup *UnixRupP;
 654         struct PKT __iomem *PacketP;
 655         unsigned short Rup;
 656         unsigned long flags;
 657
 658
 659         Rup = MAX_RUP + LINKS_PER_UNIT;
 660
 661         do {                    /* do this loop for each RUP */
 662                 /*
 663                  ** locate the rup we are processing & lock it
 664                  */
 665                 UnixRupP = &HostP->UnixRups[--Rup];
 666
 667                 spin_lock_irqsave(&UnixRupP->RupLock, flags);
 668
 669                 /*
 670                  ** First check for incoming commands:
 671                  */
 672                 if (readw(&UnixRupP->RupP->rxcontrol) != RX_RUP_INACTIVE) {
 673                         int FreeMe;
 674
 675                         PacketP = (struct PKT __iomem *) RIO_PTR(HostP->Caddr, readw(&UnixRupP->RupP->rxpkt));
 676
 677                         switch (readb(&PacketP->dest_port)) {
 678                         case BOOT_RUP:
 679                                 rio_dprintk(RIO_DEBUG_CMD, "Incoming Boot %s packet '%x'\n", readb(&PacketP->len) & 0x80 ? "Command" : "Data", readb(&PacketP->data[0]));
 680                                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 681                                 FreeMe = RIOBootRup(p, Rup, HostP, PacketP);
 682                                 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
 683                                 break;
 684
 685                         case COMMAND_RUP:
 686                                 /*
 687                                  ** Free the RUP lock as loss of carrier causes a
 688                                  ** ttyflush which will (eventually) call another
 689                                  ** routine that uses the RUP lock.
 690                                  */
 691                                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 692                                 FreeMe = RIOCommandRup(p, Rup, HostP, PacketP);
 693                                 if (readb(&PacketP->data[5]) == RIOC_MEMDUMP) {
 694                                         rio_dprintk(RIO_DEBUG_CMD, "Memdump from 0x%x complete\n", readw(&(PacketP->data[6])));
 695                                         rio_memcpy_fromio(p->RIOMemDump, &(PacketP->data[8]), 32);
 696                                 }
 697                                 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
 698                                 break;
 699
 700                         case ROUTE_RUP:
 701                                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 702                                 FreeMe = RIORouteRup(p, Rup, HostP, PacketP);
 703                                 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
 704                                 break;
 705
 706                         default:
 707                                 rio_dprintk(RIO_DEBUG_CMD, "Unknown RUP %d\n", readb(&PacketP->dest_port));
 708                                 FreeMe = 1;
 709                                 break;
 710                         }
 711
 712                         if (FreeMe) {
 713                                 rio_dprintk(RIO_DEBUG_CMD, "Free processed incoming command packet\n");
 714                                 put_free_end(HostP, PacketP);
 715
 716                                 writew(RX_RUP_INACTIVE, &UnixRupP->RupP->rxcontrol);
 717
 718                                 if (readw(&UnixRupP->RupP->handshake) == PHB_HANDSHAKE_SET) {
 719                                         rio_dprintk(RIO_DEBUG_CMD, "Handshake rup %d\n", Rup);
 720                                         writew(PHB_HANDSHAKE_SET | PHB_HANDSHAKE_RESET, &UnixRupP->RupP->handshake);
 721                                 }
 722                         }
 723                 }
 724
 725                 /*
 726                  ** IF a command was running on the port,
 727                  ** and it has completed, then tidy it up.
 728                  */
 729                 if ((CmdBlkP = UnixRupP->CmdPendingP) &&        /* ASSIGN! */
 730                     (readw(&UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) {
 731                         /*
 732                          ** we are idle.
 733                          ** there is a command in pending.
 734                          ** Therefore, this command has finished.
 735                          ** So, wakeup whoever is waiting for it (and tell them
 736                          ** what happened).
 737                          */
 738                         if (CmdBlkP->Packet.dest_port == BOOT_RUP)
 739                                 rio_dprintk(RIO_DEBUG_CMD, "Free Boot %s Command Block '%x'\n", CmdBlkP->Packet.len & 0x80 ? "Command" : "Data", CmdBlkP->Packet.data[0]);
 740
 741                         rio_dprintk(RIO_DEBUG_CMD, "Command %p completed\n", CmdBlkP);
 742
 743                         /*
 744                          ** Clear the Rup lock to prevent mutual exclusion.
 745                          */
 746                         if (CmdBlkP->PostFuncP) {
 747                                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 748                                 (*CmdBlkP->PostFuncP) (CmdBlkP->PostArg, CmdBlkP);
 749                                 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
 750                         }
 751
 752                         /*
 753                          ** ....clear the pending flag....
 754                          */
 755                         UnixRupP->CmdPendingP = NULL;
 756
 757                         /*
 758                          ** ....and return the command block to the freelist.
 759                          */
 760                         RIOFreeCmdBlk(CmdBlkP);
 761                 }
 762
 763                 /*
 764                  ** If there is a command for this rup, and the rup
 765                  ** is idle, then process the command
 766                  */
 767                 if ((CmdBlkP = UnixRupP->CmdsWaitingP) &&       /* ASSIGN! */
 768                     (UnixRupP->CmdPendingP == NULL) && (readw(&UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) {
 769                         /*
 770                          ** if the pre-function is non-zero, call it.
 771                          ** If it returns RIO_FAIL then don't
 772                          ** send this command yet!
 773                          */
 774                         if (!(CmdBlkP->PreFuncP ? (*CmdBlkP->PreFuncP) (CmdBlkP->PreArg, CmdBlkP) : 1)) {
 775                                 rio_dprintk(RIO_DEBUG_CMD, "Not ready to start command %p\n", CmdBlkP);
 776                         } else {
 777                                 rio_dprintk(RIO_DEBUG_CMD, "Start new command %p Cmd byte is 0x%x\n", CmdBlkP, CmdBlkP->Packet.data[0]);
 778                                 /*
 779                                  ** Whammy! blat that pack!
 780                                  */
 781                                 HostP->Copy(&CmdBlkP->Packet, RIO_PTR(HostP->Caddr, readw(&UnixRupP->RupP->txpkt)), sizeof(struct PKT));
 782
 783                                 /*
 784                                  ** remove the command from the rup command queue...
 785                                  */
 786                                 UnixRupP->CmdsWaitingP = CmdBlkP->NextP;
 787
 788                                 /*
 789                                  ** ...and place it on the pending position.
 790                                  */
 791                                 UnixRupP->CmdPendingP = CmdBlkP;
 792
 793                                 /*
 794                                  ** set the command register
 795                                  */
 796                                 writew(TX_PACKET_READY, &UnixRupP->RupP->txcontrol);
 797
 798                                 /*
 799                                  ** the command block will be freed
 800                                  ** when the command has been processed.
 801                                  */
 802                         }
 803                 }
 804                 spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 805         } while (Rup);
 806 }
 807
 808 int RIOWFlushMark(unsigned long iPortP, struct CmdBlk *CmdBlkP)
 809 {
 810         struct Port *PortP = (struct Port *) iPortP;
 811         unsigned long flags;
 812
 813         rio_spin_lock_irqsave(&PortP->portSem, flags);
 814         PortP->WflushFlag++;
 815         PortP->MagicFlags |= MAGIC_FLUSH;
 816         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 817         return RIOUnUse(iPortP, CmdBlkP);
 818 }
 819
 820 int RIORFlushEnable(unsigned long iPortP, struct CmdBlk *CmdBlkP)
 821 {
 822         struct Port *PortP = (struct Port *) iPortP;
 823         struct PKT __iomem *PacketP;
 824         unsigned long flags;
 825
 826         rio_spin_lock_irqsave(&PortP->portSem, flags);
 827
 828         while (can_remove_receive(&PacketP, PortP)) {
 829                 remove_receive(PortP);
 830                 put_free_end(PortP->HostP, PacketP);
 831         }
 832
 833         if (readw(&PortP->PhbP->handshake) == PHB_HANDSHAKE_SET) {
 834                 /*
 835                  ** MAGIC! (Basically, handshake the RX buffer, so that
 836                  ** the RTAs upstream can be re-enabled.)
 837                  */
 838                 rio_dprintk(RIO_DEBUG_CMD, "Util: Set RX handshake bit\n");
 839                 writew(PHB_HANDSHAKE_SET | PHB_HANDSHAKE_RESET, &PortP->PhbP->handshake);
 840         }
 841         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 842         return RIOUnUse(iPortP, CmdBlkP);
 843 }
 844
 845 int RIOUnUse(unsigned long iPortP, struct CmdBlk *CmdBlkP)
 846 {
 847         struct Port *PortP = (struct Port *) iPortP;
 848         unsigned long flags;
 849
 850         rio_spin_lock_irqsave(&PortP->portSem, flags);
 851
 852         rio_dprintk(RIO_DEBUG_CMD, "Decrement in use count for port\n");
 853
 854         if (PortP->InUse) {
 855                 if (--PortP->InUse != NOT_INUSE) {
 856                         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 857                         return 0;
 858                 }
 859         }
 860         /*
 861          ** While PortP->InUse is set (i.e. a preemptive command has been sent to
 862          ** the RTA and is awaiting completion), any transmit data is prevented from
 863          ** being transferred from the write queue into the transmit packets
 864          ** (add_transmit) and no furthur transmit interrupt will be sent for that
 865          ** data. The next interrupt will occur up to 500ms later (RIOIntr is called
 866          ** twice a second as a saftey measure). This was the case when kermit was
 867          ** used to send data into a RIO port. After each packet was sent, TCFLSH
 868          ** was called to flush the read queue preemptively. PortP->InUse was
 869          ** incremented, thereby blocking the 6 byte acknowledgement packet
 870          ** transmitted back. This acknowledgment hung around for 500ms before
 871          ** being sent, thus reducing input performance substantially!.
 872          ** When PortP->InUse becomes NOT_INUSE, we must ensure that any data
 873          ** hanging around in the transmit buffer is sent immediately.
 874          */
 875         writew(1, &PortP->HostP->ParmMapP->tx_intr);
 876         /* What to do here ..
 877            wakeup( (caddr_t)&(PortP->InUse) );
 878          */
 879         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 880         return 0;
 881 }
 882
 883 /*
 884 **
 885 ** How to use this file:
 886 **
 887 ** To send a command down a rup, you need to allocate a command block, fill
 888 ** in the packet information, fill in the command number, fill in the pre-
 889 ** and post- functions and arguments, and then add the command block to the
 890 ** queue of command blocks for the port in question. When the port is idle,
 891 ** then the pre-function will be called. If this returns RIO_FAIL then the
 892 ** command will be re-queued and tried again at a later date (probably in one
 893 ** clock tick). If the pre-function returns NOT RIO_FAIL, then the command
 894 ** packet will be queued on the RUP, and the txcontrol field set to the
 895 ** command number. When the txcontrol field has changed from being the
 896 ** command number, then the post-function will be called, with the argument
 897 ** specified earlier, a pointer to the command block, and the value of
 898 ** txcontrol.
 899 **
 900 ** To allocate a command block, call RIOGetCmdBlk(). This returns a pointer
 901 ** to the command block structure allocated, or NULL if there aren't any.
 902 ** The block will have been zeroed for you.
 903 **
 904 ** The structure has the following fields:
 905 **
 906 ** struct CmdBlk
 907 ** {
 908 **       struct CmdBlk *NextP;            ** Pointer to next command block   **
 909 **       struct PKT      Packet;                ** A packet, to copy to the rup **
 910 **                      int      (*PreFuncP)();  ** The func to call to check if OK **
 911 **                      int      PreArg;                ** The arg for the func                 **
 912 **                      int      (*PostFuncP)(); ** The func to call when completed **
 913 **                      int      PostArg;          ** The arg for the func                      **
 914 ** };
 915 **
 916 ** You need to fill in ALL fields EXCEPT NextP, which is used to link the
 917 ** blocks together either on the free list or on the Rup list.
 918 **
 919 ** Packet is an actual packet structure to be filled in with the packet
 920 ** information associated with the command. You need to fill in everything,
 921 ** as the command processor doesn't process the command packet in any way.
 922 **
 923 ** The PreFuncP is called before the packet is enqueued on the host rup.
 924 ** PreFuncP is called as (*PreFuncP)(PreArg, CmdBlkP);. PreFuncP must
 925 ** return !RIO_FAIL to have the packet queued on the rup, and RIO_FAIL
 926 ** if the packet is NOT to be queued.
 927 **
 928 ** The PostFuncP is called when the command has completed. It is called
 929 ** as (*PostFuncP)(PostArg, CmdBlkP, txcontrol);. PostFuncP is not expected
 930 ** to return a value. PostFuncP does NOT need to free the command block,
 931 ** as this happens automatically after PostFuncP returns.
 932 **
 933 ** Once the command block has been filled in, it is attached to the correct
 934 ** queue by calling RIOQueueCmdBlk( HostP, Rup, CmdBlkP ) where HostP is
 935 ** a pointer to the struct Host, Rup is the NUMBER of the rup (NOT a pointer
 936 ** to it!), and CmdBlkP is the pointer to the command block allocated using
 937 ** RIOGetCmdBlk().
 938 **
 939 */