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/uaccess.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 "pkt.h"
  54 #include "daemon.h"
  55 #include "rio.h"
  56 #include "riospace.h"
  57 #include "cmdpkt.h"
  58 #include "map.h"
  59 #include "rup.h"
  60 #include "port.h"
  61 #include "riodrvr.h"
  62 #include "rioinfo.h"
  63 #include "func.h"
  64 #include "errors.h"
  65 #include "pci.h"
  66
  67 #include "parmmap.h"
  68 #include "unixrup.h"
  69 #include "board.h"
  70 #include "host.h"
  71 #include "phb.h"
  72 #include "link.h"
  73 #include "cmdblk.h"
  74 #include "route.h"
  75 #include "cirrus.h"
  76
  77
  78 static struct IdentifyRta IdRta;
  79 static struct KillNeighbour KillUnit;
  80
  81 int RIOFoadRta(struct Host *HostP, struct Map *MapP)
  82 {
  83         struct CmdBlk *CmdBlkP;
  84
  85         rio_dprintk(RIO_DEBUG_CMD, "FOAD RTA\n");
  86
  87         CmdBlkP = RIOGetCmdBlk();
  88
  89         if (!CmdBlkP) {
  90                 rio_dprintk(RIO_DEBUG_CMD, "FOAD RTA: GetCmdBlk failed\n");
  91                 return -ENXIO;
  92         }
  93
  94         CmdBlkP->Packet.dest_unit = MapP->ID;
  95         CmdBlkP->Packet.dest_port = BOOT_RUP;
  96         CmdBlkP->Packet.src_unit = 0;
  97         CmdBlkP->Packet.src_port = BOOT_RUP;
  98         CmdBlkP->Packet.len = 0x84;
  99         CmdBlkP->Packet.data[0] = IFOAD;
 100         CmdBlkP->Packet.data[1] = 0;
 101         CmdBlkP->Packet.data[2] = IFOAD_MAGIC & 0xFF;
 102         CmdBlkP->Packet.data[3] = (IFOAD_MAGIC >> 8) & 0xFF;
 103
 104         if (RIOQueueCmdBlk(HostP, MapP->ID - 1, CmdBlkP) == RIO_FAIL) {
 105                 rio_dprintk(RIO_DEBUG_CMD, "FOAD RTA: Failed to queue foad command\n");
 106                 return -EIO;
 107         }
 108         return 0;
 109 }
 110
 111 int RIOZombieRta(struct Host *HostP, struct Map *MapP)
 112 {
 113         struct CmdBlk *CmdBlkP;
 114
 115         rio_dprintk(RIO_DEBUG_CMD, "ZOMBIE RTA\n");
 116
 117         CmdBlkP = RIOGetCmdBlk();
 118
 119         if (!CmdBlkP) {
 120                 rio_dprintk(RIO_DEBUG_CMD, "ZOMBIE RTA: GetCmdBlk failed\n");
 121                 return -ENXIO;
 122         }
 123
 124         CmdBlkP->Packet.dest_unit = MapP->ID;
 125         CmdBlkP->Packet.dest_port = BOOT_RUP;
 126         CmdBlkP->Packet.src_unit = 0;
 127         CmdBlkP->Packet.src_port = BOOT_RUP;
 128         CmdBlkP->Packet.len = 0x84;
 129         CmdBlkP->Packet.data[0] = ZOMBIE;
 130         CmdBlkP->Packet.data[1] = 0;
 131         CmdBlkP->Packet.data[2] = ZOMBIE_MAGIC & 0xFF;
 132         CmdBlkP->Packet.data[3] = (ZOMBIE_MAGIC >> 8) & 0xFF;
 133
 134         if (RIOQueueCmdBlk(HostP, MapP->ID - 1, CmdBlkP) == RIO_FAIL) {
 135                 rio_dprintk(RIO_DEBUG_CMD, "ZOMBIE RTA: Failed to queue zombie command\n");
 136                 return -EIO;
 137         }
 138         return 0;
 139 }
 140
 141 int RIOCommandRta(struct rio_info *p, unsigned long RtaUnique, int (*func) (struct Host * HostP, struct Map * MapP))
 142 {
 143         unsigned int Host;
 144
 145         rio_dprintk(RIO_DEBUG_CMD, "Command RTA 0x%lx func %p\n", RtaUnique, func);
 146
 147         if (!RtaUnique)
 148                 return (0);
 149
 150         for (Host = 0; Host < p->RIONumHosts; Host++) {
 151                 unsigned int Rta;
 152                 struct Host *HostP = &p->RIOHosts[Host];
 153
 154                 for (Rta = 0; Rta < RTAS_PER_HOST; Rta++) {
 155                         struct Map *MapP = &HostP->Mapping[Rta];
 156
 157                         if (MapP->RtaUniqueNum == RtaUnique) {
 158                                 uint Link;
 159
 160                                 /*
 161                                  ** now, lets just check we have a route to it...
 162                                  ** IF the routing stuff is working, then one of the
 163                                  ** topology entries for this unit will have a legit
 164                                  ** route *somewhere*. We care not where - if its got
 165                                  ** any connections, we can get to it.
 166                                  */
 167                                 for (Link = 0; Link < LINKS_PER_UNIT; Link++) {
 168                                         if (MapP->Topology[Link].Unit <= (u8) MAX_RUP) {
 169                                                 /*
 170                                                  ** Its worth trying the operation...
 171                                                  */
 172                                                 return (*func) (HostP, MapP);
 173                                         }
 174                                 }
 175                         }
 176                 }
 177         }
 178         return -ENXIO;
 179 }
 180
 181
 182 int RIOIdentifyRta(struct rio_info *p, void __user * arg)
 183 {
 184         unsigned int Host;
 185
 186         if (copy_from_user(&IdRta, arg, sizeof(IdRta))) {
 187                 rio_dprintk(RIO_DEBUG_CMD, "RIO_IDENTIFY_RTA copy failed\n");
 188                 p->RIOError.Error = COPYIN_FAILED;
 189                 return -EFAULT;
 190         }
 191
 192         for (Host = 0; Host < p->RIONumHosts; Host++) {
 193                 unsigned int Rta;
 194                 struct Host *HostP = &p->RIOHosts[Host];
 195
 196                 for (Rta = 0; Rta < RTAS_PER_HOST; Rta++) {
 197                         struct Map *MapP = &HostP->Mapping[Rta];
 198
 199                         if (MapP->RtaUniqueNum == IdRta.RtaUnique) {
 200                                 uint Link;
 201                                 /*
 202                                  ** now, lets just check we have a route to it...
 203                                  ** IF the routing stuff is working, then one of the
 204                                  ** topology entries for this unit will have a legit
 205                                  ** route *somewhere*. We care not where - if its got
 206                                  ** any connections, we can get to it.
 207                                  */
 208                                 for (Link = 0; Link < LINKS_PER_UNIT; Link++) {
 209                                         if (MapP->Topology[Link].Unit <= (u8) MAX_RUP) {
 210                                                 /*
 211                                                  ** Its worth trying the operation...
 212                                                  */
 213                                                 struct CmdBlk *CmdBlkP;
 214
 215                                                 rio_dprintk(RIO_DEBUG_CMD, "IDENTIFY RTA\n");
 216
 217                                                 CmdBlkP = RIOGetCmdBlk();
 218
 219                                                 if (!CmdBlkP) {
 220                                                         rio_dprintk(RIO_DEBUG_CMD, "IDENTIFY RTA: GetCmdBlk failed\n");
 221                                                         return -ENXIO;
 222                                                 }
 223
 224                                                 CmdBlkP->Packet.dest_unit = MapP->ID;
 225                                                 CmdBlkP->Packet.dest_port = BOOT_RUP;
 226                                                 CmdBlkP->Packet.src_unit = 0;
 227                                                 CmdBlkP->Packet.src_port = BOOT_RUP;
 228                                                 CmdBlkP->Packet.len = 0x84;
 229                                                 CmdBlkP->Packet.data[0] = IDENTIFY;
 230                                                 CmdBlkP->Packet.data[1] = 0;
 231                                                 CmdBlkP->Packet.data[2] = IdRta.ID;
 232
 233                                                 if (RIOQueueCmdBlk(HostP, MapP->ID - 1, CmdBlkP) == RIO_FAIL) {
 234                                                         rio_dprintk(RIO_DEBUG_CMD, "IDENTIFY RTA: Failed to queue command\n");
 235                                                         return -EIO;
 236                                                 }
 237                                                 return 0;
 238                                         }
 239                                 }
 240                         }
 241                 }
 242         }
 243         return -ENOENT;
 244 }
 245
 246
 247 int RIOKillNeighbour(struct rio_info *p, void __user * arg)
 248 {
 249         uint Host;
 250         uint ID;
 251         struct Host *HostP;
 252         struct CmdBlk *CmdBlkP;
 253
 254         rio_dprintk(RIO_DEBUG_CMD, "KILL HOST NEIGHBOUR\n");
 255
 256         if (copy_from_user(&KillUnit, arg, sizeof(KillUnit))) {
 257                 rio_dprintk(RIO_DEBUG_CMD, "RIO_KILL_NEIGHBOUR copy failed\n");
 258                 p->RIOError.Error = COPYIN_FAILED;
 259                 return -EFAULT;
 260         }
 261
 262         if (KillUnit.Link > 3)
 263                 return -ENXIO;
 264
 265         CmdBlkP = RIOGetCmdBlk();
 266
 267         if (!CmdBlkP) {
 268                 rio_dprintk(RIO_DEBUG_CMD, "UFOAD: GetCmdBlk failed\n");
 269                 return -ENXIO;
 270         }
 271
 272         CmdBlkP->Packet.dest_unit = 0;
 273         CmdBlkP->Packet.src_unit = 0;
 274         CmdBlkP->Packet.dest_port = BOOT_RUP;
 275         CmdBlkP->Packet.src_port = BOOT_RUP;
 276         CmdBlkP->Packet.len = 0x84;
 277         CmdBlkP->Packet.data[0] = UFOAD;
 278         CmdBlkP->Packet.data[1] = KillUnit.Link;
 279         CmdBlkP->Packet.data[2] = UFOAD_MAGIC & 0xFF;
 280         CmdBlkP->Packet.data[3] = (UFOAD_MAGIC >> 8) & 0xFF;
 281
 282         for (Host = 0; Host < p->RIONumHosts; Host++) {
 283                 ID = 0;
 284                 HostP = &p->RIOHosts[Host];
 285
 286                 if (HostP->UniqueNum == KillUnit.UniqueNum) {
 287                         if (RIOQueueCmdBlk(HostP, RTAS_PER_HOST + KillUnit.Link, CmdBlkP) == RIO_FAIL) {
 288                                 rio_dprintk(RIO_DEBUG_CMD, "UFOAD: Failed queue command\n");
 289                                 return -EIO;
 290                         }
 291                         return 0;
 292                 }
 293
 294                 for (ID = 0; ID < RTAS_PER_HOST; ID++) {
 295                         if (HostP->Mapping[ID].RtaUniqueNum == KillUnit.UniqueNum) {
 296                                 CmdBlkP->Packet.dest_unit = ID + 1;
 297                                 if (RIOQueueCmdBlk(HostP, ID, CmdBlkP) == RIO_FAIL) {
 298                                         rio_dprintk(RIO_DEBUG_CMD, "UFOAD: Failed queue command\n");
 299                                         return -EIO;
 300                                 }
 301                                 return 0;
 302                         }
 303                 }
 304         }
 305         RIOFreeCmdBlk(CmdBlkP);
 306         return -ENXIO;
 307 }
 308
 309 int RIOSuspendBootRta(struct Host *HostP, int ID, int Link)
 310 {
 311         struct CmdBlk *CmdBlkP;
 312
 313         rio_dprintk(RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA ID %d, link %c\n", ID, 'A' + Link);
 314
 315         CmdBlkP = RIOGetCmdBlk();
 316
 317         if (!CmdBlkP) {
 318                 rio_dprintk(RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: GetCmdBlk failed\n");
 319                 return -ENXIO;
 320         }
 321
 322         CmdBlkP->Packet.dest_unit = ID;
 323         CmdBlkP->Packet.dest_port = BOOT_RUP;
 324         CmdBlkP->Packet.src_unit = 0;
 325         CmdBlkP->Packet.src_port = BOOT_RUP;
 326         CmdBlkP->Packet.len = 0x84;
 327         CmdBlkP->Packet.data[0] = IWAIT;
 328         CmdBlkP->Packet.data[1] = Link;
 329         CmdBlkP->Packet.data[2] = IWAIT_MAGIC & 0xFF;
 330         CmdBlkP->Packet.data[3] = (IWAIT_MAGIC >> 8) & 0xFF;
 331
 332         if (RIOQueueCmdBlk(HostP, ID - 1, CmdBlkP) == RIO_FAIL) {
 333                 rio_dprintk(RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: Failed to queue iwait command\n");
 334                 return -EIO;
 335         }
 336         return 0;
 337 }
 338
 339 int RIOFoadWakeup(struct rio_info *p)
 340 {
 341         int port;
 342         struct Port *PortP;
 343         unsigned long flags;
 344
 345         for (port = 0; port < RIO_PORTS; port++) {
 346                 PortP = p->RIOPortp[port];
 347
 348                 rio_spin_lock_irqsave(&PortP->portSem, flags);
 349                 PortP->Config = 0;
 350                 PortP->State = 0;
 351                 PortP->InUse = NOT_INUSE;
 352                 PortP->PortState = 0;
 353                 PortP->FlushCmdBodge = 0;
 354                 PortP->ModemLines = 0;
 355                 PortP->ModemState = 0;
 356                 PortP->CookMode = 0;
 357                 PortP->ParamSem = 0;
 358                 PortP->Mapped = 0;
 359                 PortP->WflushFlag = 0;
 360                 PortP->MagicFlags = 0;
 361                 PortP->RxDataStart = 0;
 362                 PortP->TxBufferIn = 0;
 363                 PortP->TxBufferOut = 0;
 364                 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 365         }
 366         return (0);
 367 }
 368
 369 /*
 370 ** Incoming command on the COMMAND_RUP to be processed.
 371 */
 372 static int RIOCommandRup(struct rio_info *p, uint Rup, struct Host *HostP, struct PKT __iomem *PacketP)
 373 {
 374         struct PktCmd __iomem *PktCmdP = (struct PktCmd __iomem *)PacketP->data;
 375         struct Port *PortP;
 376         struct UnixRup *UnixRupP;
 377         unsigned short SysPort;
 378         unsigned short ReportedModemStatus;
 379         unsigned short rup;
 380         unsigned short subCommand;
 381         unsigned long flags;
 382
 383         func_enter();
 384
 385         /*
 386          ** 16 port RTA note:
 387          ** Command rup packets coming from the RTA will have pkt->data[1] (which
 388          ** translates to PktCmdP->PhbNum) set to the host port number for the
 389          ** particular unit. To access the correct BaseSysPort for a 16 port RTA,
 390          ** we can use PhbNum to get the rup number for the appropriate 8 port
 391          ** block (for the first block, this should be equal to 'Rup').
 392          */
 393         rup = readb(&PktCmdP->PhbNum) / (unsigned short) PORTS_PER_RTA;
 394         UnixRupP = &HostP->UnixRups[rup];
 395         SysPort = UnixRupP->BaseSysPort + (readb(&PktCmdP->PhbNum) % (unsigned short) PORTS_PER_RTA);
 396         rio_dprintk(RIO_DEBUG_CMD, "Command on rup %d, port %d\n", rup, SysPort);
 397
 398         if (UnixRupP->BaseSysPort == NO_PORT) {
 399                 rio_dprintk(RIO_DEBUG_CMD, "OBSCURE ERROR!\n");
 400                 rio_dprintk(RIO_DEBUG_CMD, "Diagnostics follow. Please WRITE THESE DOWN and report them to Specialix Technical Support\n");
 401                 rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: Host number %Zd, name ``%s''\n", HostP - p->RIOHosts, HostP->Name);
 402                 rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: Rup number  0x%x\n", rup);
 403
 404                 if (Rup < (unsigned short) MAX_RUP) {
 405                         rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: This is the RUP for RTA ``%s''\n", HostP->Mapping[Rup].Name);
 406                 } else
 407                         rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: This is the RUP for link ``%c'' of host ``%s''\n", ('A' + Rup - MAX_RUP), HostP->Name);
 408
 409                 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Destination 0x%x:0x%x\n", readb(&PacketP->dest_unit), readb(&PacketP->dest_port));
 410                 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Source    0x%x:0x%x\n", readb(&PacketP->src_unit), readb(&PacketP->src_port));
 411                 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Length    0x%x (%d)\n", readb(&PacketP->len), readb(&PacketP->len));
 412                 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Control  0x%x (%d)\n", readb(&PacketP->control), readb(&PacketP->control));
 413                 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Check      0x%x (%d)\n", readw(&PacketP->csum), readw(&PacketP->csum));
 414                 rio_dprintk(RIO_DEBUG_CMD, "COMMAND information: Host Port Number 0x%x, " "Command Code 0x%x\n", readb(&PktCmdP->PhbNum), readb(&PktCmdP->Command));
 415                 return 1;
 416         }
 417         PortP = p->RIOPortp[SysPort];
 418         rio_spin_lock_irqsave(&PortP->portSem, flags);
 419         switch (readb(&PktCmdP->Command)) {
 420         case RIOC_BREAK_RECEIVED:
 421                 rio_dprintk(RIO_DEBUG_CMD, "Received a break!\n");
 422                 /* If the current line disc. is not multi-threading and
 423                    the current processor is not the default, reset rup_intr
 424                    and return 0 to ensure that the command packet is
 425                    not freed. */
 426                 /* Call tmgr HANGUP HERE */
 427                 /* Fix this later when every thing works !!!! RAMRAJ */
 428                 gs_got_break(&PortP->gs);
 429                 break;
 430
 431         case RIOC_COMPLETE:
 432                 rio_dprintk(RIO_DEBUG_CMD, "Command complete on phb %d host %Zd\n", readb(&PktCmdP->PhbNum), HostP - p->RIOHosts);
 433                 subCommand = 1;
 434                 switch (readb(&PktCmdP->SubCommand)) {
 435                 case RIOC_MEMDUMP:
 436                         rio_dprintk(RIO_DEBUG_CMD, "Memory dump cmd (0x%x) from addr 0x%x\n", readb(&PktCmdP->SubCommand), readw(&PktCmdP->SubAddr));
 437                         break;
 438                 case RIOC_READ_REGISTER:
 439                         rio_dprintk(RIO_DEBUG_CMD, "Read register (0x%x)\n", readw(&PktCmdP->SubAddr));
 440                         p->CdRegister = (readb(&PktCmdP->ModemStatus) & RIOC_MSVR1_HOST);
 441                         break;
 442                 default:
 443                         subCommand = 0;
 444                         break;
 445                 }
 446                 if (subCommand)
 447                         break;
 448                 rio_dprintk(RIO_DEBUG_CMD, "New status is 0x%x was 0x%x\n", readb(&PktCmdP->PortStatus), PortP->PortState);
 449                 if (PortP->PortState != readb(&PktCmdP->PortStatus)) {
 450                         rio_dprintk(RIO_DEBUG_CMD, "Mark status & wakeup\n");
 451                         PortP->PortState = readb(&PktCmdP->PortStatus);
 452                         /* What should we do here ...
 453                            wakeup( &PortP->PortState );
 454                          */
 455                 } else
 456                         rio_dprintk(RIO_DEBUG_CMD, "No change\n");
 457
 458                 /* FALLTHROUGH */
 459         case RIOC_MODEM_STATUS:
 460                 /*
 461                  ** Knock out the tbusy and tstop bits, as these are not relevant
 462                  ** to the check for modem status change (they're just there because
 463                  ** it's a convenient place to put them!).
 464                  */
 465                 ReportedModemStatus = readb(&PktCmdP->ModemStatus);
 466                 if ((PortP->ModemState & RIOC_MSVR1_HOST) ==
 467                                 (ReportedModemStatus & RIOC_MSVR1_HOST)) {
 468                         rio_dprintk(RIO_DEBUG_CMD, "Modem status unchanged 0x%x\n", PortP->ModemState);
 469                         /*
 470                          ** Update ModemState just in case tbusy or tstop states have
 471                          ** changed.
 472                          */
 473                         PortP->ModemState = ReportedModemStatus;
 474                 } else {
 475                         rio_dprintk(RIO_DEBUG_CMD, "Modem status change from 0x%x to 0x%x\n", PortP->ModemState, ReportedModemStatus);
 476                         PortP->ModemState = ReportedModemStatus;
 477 #ifdef MODEM_SUPPORT
 478                         if (PortP->Mapped) {
 479                                 /***********************************************************\
 480                                 *************************************************************
 481                                 ***                                                                                                        ***
 482                                 ***               M O D E M   S T A T E   C H A N G E             ***
 483                                 ***                                                                                                        ***
 484                                 *************************************************************
 485                                 \***********************************************************/
 486                                 /*
 487                                  ** If the device is a modem, then check the modem
 488                                  ** carrier.
 489                                  */
 490                                 if (PortP->gs.tty == NULL)
 491                                         break;
 492                                 if (PortP->gs.tty->termios == NULL)
 493                                         break;
 494
 495                                 if (!(PortP->gs.tty->termios->c_cflag & CLOCAL) && ((PortP->State & (RIO_MOPEN | RIO_WOPEN)))) {
 496
 497                                         rio_dprintk(RIO_DEBUG_CMD, "Is there a Carrier?\n");
 498                                         /*
 499                                          ** Is there a carrier?
 500                                          */
 501                                         if (PortP->ModemState & RIOC_MSVR1_CD) {
 502                                                 /*
 503                                                  ** Has carrier just appeared?
 504                                                  */
 505                                                 if (!(PortP->State & RIO_CARR_ON)) {
 506                                                         rio_dprintk(RIO_DEBUG_CMD, "Carrier just came up.\n");
 507                                                         PortP->State |= RIO_CARR_ON;
 508                                                         /*
 509                                                          ** wakeup anyone in WOPEN
 510                                                          */
 511                                                         if (PortP->State & (PORT_ISOPEN | RIO_WOPEN))
 512                                                                 wake_up_interruptible(&PortP->gs.open_wait);
 513                                                 }
 514                                         } else {
 515                                                 /*
 516                                                  ** Has carrier just dropped?
 517                                                  */
 518                                                 if (PortP->State & RIO_CARR_ON) {
 519                                                         if (PortP->State & (PORT_ISOPEN | RIO_WOPEN | RIO_MOPEN))
 520                                                                 tty_hangup(PortP->gs.tty);
 521                                                         PortP->State &= ~RIO_CARR_ON;
 522                                                         rio_dprintk(RIO_DEBUG_CMD, "Carrirer just went down\n");
 523                                                 }
 524                                         }
 525                                 }
 526                         }
 527 #endif
 528                 }
 529                 break;
 530
 531         default:
 532                 rio_dprintk(RIO_DEBUG_CMD, "Unknown command %d on CMD_RUP of host %Zd\n", readb(&PktCmdP->Command), HostP - p->RIOHosts);
 533                 break;
 534         }
 535         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 536
 537         func_exit();
 538
 539         return 1;
 540 }
 541
 542 /*
 543 ** The command mechanism:
 544 **      Each rup has a chain of commands associated with it.
 545 **      This chain is maintained by routines in this file.
 546 **      Periodically we are called and we run a quick check of all the
 547 **      active chains to determine if there is a command to be executed,
 548 **      and if the rup is ready to accept it.
 549 **
 550 */
 551
 552 /*
 553 ** Allocate an empty command block.
 554 */
 555 struct CmdBlk *RIOGetCmdBlk(void)
 556 {
 557         struct CmdBlk *CmdBlkP;
 558
 559         CmdBlkP = kzalloc(sizeof(struct CmdBlk), GFP_ATOMIC);
 560         return CmdBlkP;
 561 }
 562
 563 /*
 564 ** Return a block to the head of the free list.
 565 */
 566 void RIOFreeCmdBlk(struct CmdBlk *CmdBlkP)
 567 {
 568         kfree(CmdBlkP);
 569 }
 570
 571 /*
 572 ** attach a command block to the list of commands to be performed for
 573 ** a given rup.
 574 */
 575 int RIOQueueCmdBlk(struct Host *HostP, uint Rup, struct CmdBlk *CmdBlkP)
 576 {
 577         struct CmdBlk **Base;
 578         struct UnixRup *UnixRupP;
 579         unsigned long flags;
 580
 581         if (Rup >= (unsigned short) (MAX_RUP + LINKS_PER_UNIT)) {
 582                 rio_dprintk(RIO_DEBUG_CMD, "Illegal rup number %d in RIOQueueCmdBlk\n", Rup);
 583                 RIOFreeCmdBlk(CmdBlkP);
 584                 return RIO_FAIL;
 585         }
 586
 587         UnixRupP = &HostP->UnixRups[Rup];
 588
 589         rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
 590
 591         /*
 592          ** If the RUP is currently inactive, then put the request
 593          ** straight on the RUP....
 594          */
 595         if ((UnixRupP->CmdsWaitingP == NULL) && (UnixRupP->CmdPendingP == NULL) && (readw(&UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE) && (CmdBlkP->PreFuncP ? (*CmdBlkP->PreFuncP) (CmdBlkP->PreArg, CmdBlkP)
 596                                                                                                                                              : 1)) {
 597                 rio_dprintk(RIO_DEBUG_CMD, "RUP inactive-placing command straight on. Cmd byte is 0x%x\n", CmdBlkP->Packet.data[0]);
 598
 599                 /*
 600                  ** Whammy! blat that pack!
 601                  */
 602                 HostP->Copy(&CmdBlkP->Packet, RIO_PTR(HostP->Caddr, readw(&UnixRupP->RupP->txpkt)), sizeof(struct PKT));
 603
 604                 /*
 605                  ** place command packet on the pending position.
 606                  */
 607                 UnixRupP->CmdPendingP = CmdBlkP;
 608
 609                 /*
 610                  ** set the command register
 611                  */
 612                 writew(TX_PACKET_READY, &UnixRupP->RupP->txcontrol);
 613
 614                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 615
 616                 return 0;
 617         }
 618         rio_dprintk(RIO_DEBUG_CMD, "RUP active - en-queing\n");
 619
 620         if (UnixRupP->CmdsWaitingP != NULL)
 621                 rio_dprintk(RIO_DEBUG_CMD, "Rup active - command waiting\n");
 622         if (UnixRupP->CmdPendingP != NULL)
 623                 rio_dprintk(RIO_DEBUG_CMD, "Rup active - command pending\n");
 624         if (readw(&UnixRupP->RupP->txcontrol) != TX_RUP_INACTIVE)
 625                 rio_dprintk(RIO_DEBUG_CMD, "Rup active - command rup not ready\n");
 626
 627         Base = &UnixRupP->CmdsWaitingP;
 628
 629         rio_dprintk(RIO_DEBUG_CMD, "First try to queue cmdblk %p at %p\n", CmdBlkP, Base);
 630
 631         while (*Base) {
 632                 rio_dprintk(RIO_DEBUG_CMD, "Command cmdblk %p here\n", *Base);
 633                 Base = &((*Base)->NextP);
 634                 rio_dprintk(RIO_DEBUG_CMD, "Now try to queue cmd cmdblk %p at %p\n", CmdBlkP, Base);
 635         }
 636
 637         rio_dprintk(RIO_DEBUG_CMD, "Will queue cmdblk %p at %p\n", CmdBlkP, Base);
 638
 639         *Base = CmdBlkP;
 640
 641         CmdBlkP->NextP = NULL;
 642
 643         rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 644
 645         return 0;
 646 }
 647
 648 /*
 649 ** Here we go - if there is an empty rup, fill it!
 650 ** must be called at splrio() or higher.
 651 */
 652 void RIOPollHostCommands(struct rio_info *p, struct Host *HostP)
 653 {
 654         struct CmdBlk *CmdBlkP;
 655         struct UnixRup *UnixRupP;
 656         struct PKT __iomem *PacketP;
 657         unsigned short Rup;
 658         unsigned long flags;
 659
 660
 661         Rup = MAX_RUP + LINKS_PER_UNIT;
 662
 663         do {                    /* do this loop for each RUP */
 664                 /*
 665                  ** locate the rup we are processing & lock it
 666                  */
 667                 UnixRupP = &HostP->UnixRups[--Rup];
 668
 669                 spin_lock_irqsave(&UnixRupP->RupLock, flags);
 670
 671                 /*
 672                  ** First check for incoming commands:
 673                  */
 674                 if (readw(&UnixRupP->RupP->rxcontrol) != RX_RUP_INACTIVE) {
 675                         int FreeMe;
 676
 677                         PacketP = (struct PKT __iomem *) RIO_PTR(HostP->Caddr, readw(&UnixRupP->RupP->rxpkt));
 678
 679                         switch (readb(&PacketP->dest_port)) {
 680                         case BOOT_RUP:
 681                                 rio_dprintk(RIO_DEBUG_CMD, "Incoming Boot %s packet '%x'\n", readb(&PacketP->len) & 0x80 ? "Command" : "Data", readb(&PacketP->data[0]));
 682                                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 683                                 FreeMe = RIOBootRup(p, Rup, HostP, PacketP);
 684                                 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
 685                                 break;
 686
 687                         case COMMAND_RUP:
 688                                 /*
 689                                  ** Free the RUP lock as loss of carrier causes a
 690                                  ** ttyflush which will (eventually) call another
 691                                  ** routine that uses the RUP lock.
 692                                  */
 693                                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 694                                 FreeMe = RIOCommandRup(p, Rup, HostP, PacketP);
 695                                 if (readb(&PacketP->data[5]) == RIOC_MEMDUMP) {
 696                                         rio_dprintk(RIO_DEBUG_CMD, "Memdump from 0x%x complete\n", readw(&(PacketP->data[6])));
 697                                         rio_memcpy_fromio(p->RIOMemDump, &(PacketP->data[8]), 32);
 698                                 }
 699                                 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
 700                                 break;
 701
 702                         case ROUTE_RUP:
 703                                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 704                                 FreeMe = RIORouteRup(p, Rup, HostP, PacketP);
 705                                 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
 706                                 break;
 707
 708                         default:
 709                                 rio_dprintk(RIO_DEBUG_CMD, "Unknown RUP %d\n", readb(&PacketP->dest_port));
 710                                 FreeMe = 1;
 711                                 break;
 712                         }
 713
 714                         if (FreeMe) {
 715                                 rio_dprintk(RIO_DEBUG_CMD, "Free processed incoming command packet\n");
 716                                 put_free_end(HostP, PacketP);
 717
 718                                 writew(RX_RUP_INACTIVE, &UnixRupP->RupP->rxcontrol);
 719
 720                                 if (readw(&UnixRupP->RupP->handshake) == PHB_HANDSHAKE_SET) {
 721                                         rio_dprintk(RIO_DEBUG_CMD, "Handshake rup %d\n", Rup);
 722                                         writew(PHB_HANDSHAKE_SET | PHB_HANDSHAKE_RESET, &UnixRupP->RupP->handshake);
 723                                 }
 724                         }
 725                 }
 726
 727                 /*
 728                  ** IF a command was running on the port,
 729                  ** and it has completed, then tidy it up.
 730                  */
 731                 if ((CmdBlkP = UnixRupP->CmdPendingP) &&        /* ASSIGN! */
 732                     (readw(&UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) {
 733                         /*
 734                          ** we are idle.
 735                          ** there is a command in pending.
 736                          ** Therefore, this command has finished.
 737                          ** So, wakeup whoever is waiting for it (and tell them
 738                          ** what happened).
 739                          */
 740                         if (CmdBlkP->Packet.dest_port == BOOT_RUP)
 741                                 rio_dprintk(RIO_DEBUG_CMD, "Free Boot %s Command Block '%x'\n", CmdBlkP->Packet.len & 0x80 ? "Command" : "Data", CmdBlkP->Packet.data[0]);
 742
 743                         rio_dprintk(RIO_DEBUG_CMD, "Command %p completed\n", CmdBlkP);
 744
 745                         /*
 746                          ** Clear the Rup lock to prevent mutual exclusion.
 747                          */
 748                         if (CmdBlkP->PostFuncP) {
 749                                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 750                                 (*CmdBlkP->PostFuncP) (CmdBlkP->PostArg, CmdBlkP);
 751                                 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
 752                         }
 753
 754                         /*
 755                          ** ....clear the pending flag....
 756                          */
 757                         UnixRupP->CmdPendingP = NULL;
 758
 759                         /*
 760                          ** ....and return the command block to the freelist.
 761                          */
 762                         RIOFreeCmdBlk(CmdBlkP);
 763                 }
 764
 765                 /*
 766                  ** If there is a command for this rup, and the rup
 767                  ** is idle, then process the command
 768                  */
 769                 if ((CmdBlkP = UnixRupP->CmdsWaitingP) &&       /* ASSIGN! */
 770                     (UnixRupP->CmdPendingP == NULL) && (readw(&UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) {
 771                         /*
 772                          ** if the pre-function is non-zero, call it.
 773                          ** If it returns RIO_FAIL then don't
 774                          ** send this command yet!
 775                          */
 776                         if (!(CmdBlkP->PreFuncP ? (*CmdBlkP->PreFuncP) (CmdBlkP->PreArg, CmdBlkP) : 1)) {
 777                                 rio_dprintk(RIO_DEBUG_CMD, "Not ready to start command %p\n", CmdBlkP);
 778                         } else {
 779                                 rio_dprintk(RIO_DEBUG_CMD, "Start new command %p Cmd byte is 0x%x\n", CmdBlkP, CmdBlkP->Packet.data[0]);
 780                                 /*
 781                                  ** Whammy! blat that pack!
 782                                  */
 783                                 HostP->Copy(&CmdBlkP->Packet, RIO_PTR(HostP->Caddr, readw(&UnixRupP->RupP->txpkt)), sizeof(struct PKT));
 784
 785                                 /*
 786                                  ** remove the command from the rup command queue...
 787                                  */
 788                                 UnixRupP->CmdsWaitingP = CmdBlkP->NextP;
 789
 790                                 /*
 791                                  ** ...and place it on the pending position.
 792                                  */
 793                                 UnixRupP->CmdPendingP = CmdBlkP;
 794
 795                                 /*
 796                                  ** set the command register
 797                                  */
 798                                 writew(TX_PACKET_READY, &UnixRupP->RupP->txcontrol);
 799
 800                                 /*
 801                                  ** the command block will be freed
 802                                  ** when the command has been processed.
 803                                  */
 804                         }
 805                 }
 806                 spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
 807         } while (Rup);
 808 }
 809
 810 int RIOWFlushMark(unsigned long iPortP, struct CmdBlk *CmdBlkP)
 811 {
 812         struct Port *PortP = (struct Port *) iPortP;
 813         unsigned long flags;
 814
 815         rio_spin_lock_irqsave(&PortP->portSem, flags);
 816         PortP->WflushFlag++;
 817         PortP->MagicFlags |= MAGIC_FLUSH;
 818         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 819         return RIOUnUse(iPortP, CmdBlkP);
 820 }
 821
 822 int RIORFlushEnable(unsigned long iPortP, struct CmdBlk *CmdBlkP)
 823 {
 824         struct Port *PortP = (struct Port *) iPortP;
 825         struct PKT __iomem *PacketP;
 826         unsigned long flags;
 827
 828         rio_spin_lock_irqsave(&PortP->portSem, flags);
 829
 830         while (can_remove_receive(&PacketP, PortP)) {
 831                 remove_receive(PortP);
 832                 put_free_end(PortP->HostP, PacketP);
 833         }
 834
 835         if (readw(&PortP->PhbP->handshake) == PHB_HANDSHAKE_SET) {
 836                 /*
 837                  ** MAGIC! (Basically, handshake the RX buffer, so that
 838                  ** the RTAs upstream can be re-enabled.)
 839                  */
 840                 rio_dprintk(RIO_DEBUG_CMD, "Util: Set RX handshake bit\n");
 841                 writew(PHB_HANDSHAKE_SET | PHB_HANDSHAKE_RESET, &PortP->PhbP->handshake);
 842         }
 843         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 844         return RIOUnUse(iPortP, CmdBlkP);
 845 }
 846
 847 int RIOUnUse(unsigned long iPortP, struct CmdBlk *CmdBlkP)
 848 {
 849         struct Port *PortP = (struct Port *) iPortP;
 850         unsigned long flags;
 851
 852         rio_spin_lock_irqsave(&PortP->portSem, flags);
 853
 854         rio_dprintk(RIO_DEBUG_CMD, "Decrement in use count for port\n");
 855
 856         if (PortP->InUse) {
 857                 if (--PortP->InUse != NOT_INUSE) {
 858                         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 859                         return 0;
 860                 }
 861         }
 862         /*
 863          ** While PortP->InUse is set (i.e. a preemptive command has been sent to
 864          ** the RTA and is awaiting completion), any transmit data is prevented from
 865          ** being transferred from the write queue into the transmit packets
 866          ** (add_transmit) and no furthur transmit interrupt will be sent for that
 867          ** data. The next interrupt will occur up to 500ms later (RIOIntr is called
 868          ** twice a second as a saftey measure). This was the case when kermit was
 869          ** used to send data into a RIO port. After each packet was sent, TCFLSH
 870          ** was called to flush the read queue preemptively. PortP->InUse was
 871          ** incremented, thereby blocking the 6 byte acknowledgement packet
 872          ** transmitted back. This acknowledgment hung around for 500ms before
 873          ** being sent, thus reducing input performance substantially!.
 874          ** When PortP->InUse becomes NOT_INUSE, we must ensure that any data
 875          ** hanging around in the transmit buffer is sent immediately.
 876          */
 877         writew(1, &PortP->HostP->ParmMapP->tx_intr);
 878         /* What to do here ..
 879            wakeup( (caddr_t)&(PortP->InUse) );
 880          */
 881         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 882         return 0;
 883 }
 884
 885 /*
 886 **
 887 ** How to use this file:
 888 **
 889 ** To send a command down a rup, you need to allocate a command block, fill
 890 ** in the packet information, fill in the command number, fill in the pre-
 891 ** and post- functions and arguments, and then add the command block to the
 892 ** queue of command blocks for the port in question. When the port is idle,
 893 ** then the pre-function will be called. If this returns RIO_FAIL then the
 894 ** command will be re-queued and tried again at a later date (probably in one
 895 ** clock tick). If the pre-function returns NOT RIO_FAIL, then the command
 896 ** packet will be queued on the RUP, and the txcontrol field set to the
 897 ** command number. When the txcontrol field has changed from being the
 898 ** command number, then the post-function will be called, with the argument
 899 ** specified earlier, a pointer to the command block, and the value of
 900 ** txcontrol.
 901 **
 902 ** To allocate a command block, call RIOGetCmdBlk(). This returns a pointer
 903 ** to the command block structure allocated, or NULL if there aren't any.
 904 ** The block will have been zeroed for you.
 905 **
 906 ** The structure has the following fields:
 907 **
 908 ** struct CmdBlk
 909 ** {
 910 **       struct CmdBlk *NextP;            ** Pointer to next command block   **
 911 **       struct PKT      Packet;                ** A packet, to copy to the rup **
 912 **                      int      (*PreFuncP)();  ** The func to call to check if OK **
 913 **                      int      PreArg;                ** The arg for the func                 **
 914 **                      int      (*PostFuncP)(); ** The func to call when completed **
 915 **                      int      PostArg;          ** The arg for the func                      **
 916 ** };
 917 **
 918 ** You need to fill in ALL fields EXCEPT NextP, which is used to link the
 919 ** blocks together either on the free list or on the Rup list.
 920 **
 921 ** Packet is an actual packet structure to be filled in with the packet
 922 ** information associated with the command. You need to fill in everything,
 923 ** as the command processor doesn't process the command packet in any way.
 924 **
 925 ** The PreFuncP is called before the packet is enqueued on the host rup.
 926 ** PreFuncP is called as (*PreFuncP)(PreArg, CmdBlkP);. PreFuncP must
 927 ** return !RIO_FAIL to have the packet queued on the rup, and RIO_FAIL
 928 ** if the packet is NOT to be queued.
 929 **
 930 ** The PostFuncP is called when the command has completed. It is called
 931 ** as (*PostFuncP)(PostArg, CmdBlkP, txcontrol);. PostFuncP is not expected
 932 ** to return a value. PostFuncP does NOT need to free the command block,
 933 ** as this happens automatically after PostFuncP returns.
 934 **
 935 ** Once the command block has been filled in, it is attached to the correct
 936 ** queue by calling RIOQueueCmdBlk( HostP, Rup, CmdBlkP ) where HostP is
 937 ** a pointer to the struct Host, Rup is the NUMBER of the rup (NOT a pointer
 938 ** to it!), and CmdBlkP is the pointer to the command block allocated using
 939 ** RIOGetCmdBlk().
 940 **
 941 */