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 76static struct IdentifyRta IdRta; 77static struct KillNeighbour KillUnit; 78 79int 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 109int 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 139int 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 180int 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 245int 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 307int 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 337int 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*/ 370static 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*/ 553struct 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*/ 564void 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*/ 573int 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*/ 650void 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 808int 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 820int 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 845int 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*/ 940