Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | ** ----------------------------------------------------------------------------- |
| 3 | ** |
| 4 | ** Perle Specialix driver for Linux |
| 5 | ** ported from the existing SCO driver source |
| 6 | ** |
| 7 | * |
| 8 | * (C) 1990 - 2000 Specialix International Ltd., Byfleet, Surrey, UK. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 23 | ** |
| 24 | ** Module : riocmd.c |
| 25 | ** SID : 1.2 |
| 26 | ** Last Modified : 11/6/98 10:33:41 |
| 27 | ** Retrieved : 11/6/98 10:33:49 |
| 28 | ** |
| 29 | ** ident @(#)riocmd.c 1.2 |
| 30 | ** |
| 31 | ** ----------------------------------------------------------------------------- |
| 32 | */ |
| 33 | #ifdef SCCS_LABELS |
| 34 | static char *_riocmd_c_sccs_ = "@(#)riocmd.c 1.2"; |
| 35 | #endif |
| 36 | |
| 37 | #include <linux/module.h> |
| 38 | #include <linux/slab.h> |
| 39 | #include <linux/errno.h> |
| 40 | #include <linux/tty.h> |
| 41 | #include <asm/io.h> |
| 42 | #include <asm/system.h> |
| 43 | #include <asm/string.h> |
| 44 | #include <asm/semaphore.h> |
| 45 | |
| 46 | #include <linux/termios.h> |
| 47 | #include <linux/serial.h> |
| 48 | |
| 49 | #include <linux/generic_serial.h> |
| 50 | |
| 51 | #include "linux_compat.h" |
| 52 | #include "rio_linux.h" |
| 53 | #include "typdef.h" |
| 54 | #include "pkt.h" |
| 55 | #include "daemon.h" |
| 56 | #include "rio.h" |
| 57 | #include "riospace.h" |
| 58 | #include "top.h" |
| 59 | #include "cmdpkt.h" |
| 60 | #include "map.h" |
| 61 | #include "riotypes.h" |
| 62 | #include "rup.h" |
| 63 | #include "port.h" |
| 64 | #include "riodrvr.h" |
| 65 | #include "rioinfo.h" |
| 66 | #include "func.h" |
| 67 | #include "errors.h" |
| 68 | #include "pci.h" |
| 69 | |
| 70 | #include "parmmap.h" |
| 71 | #include "unixrup.h" |
| 72 | #include "board.h" |
| 73 | #include "host.h" |
| 74 | #include "error.h" |
| 75 | #include "phb.h" |
| 76 | #include "link.h" |
| 77 | #include "cmdblk.h" |
| 78 | #include "route.h" |
| 79 | #include "control.h" |
| 80 | #include "cirrus.h" |
| 81 | |
| 82 | |
| 83 | static struct IdentifyRta IdRta; |
| 84 | static struct KillNeighbour KillUnit; |
| 85 | |
| 86 | int |
| 87 | RIOFoadRta(struct Host *HostP, struct Map *MapP) |
| 88 | { |
| 89 | struct CmdBlk *CmdBlkP; |
| 90 | |
| 91 | rio_dprintk (RIO_DEBUG_CMD, "FOAD RTA\n"); |
| 92 | |
| 93 | CmdBlkP = RIOGetCmdBlk(); |
| 94 | |
| 95 | if ( !CmdBlkP ) { |
| 96 | rio_dprintk (RIO_DEBUG_CMD, "FOAD RTA: GetCmdBlk failed\n"); |
| 97 | return -ENXIO; |
| 98 | } |
| 99 | |
| 100 | CmdBlkP->Packet.dest_unit = MapP->ID; |
| 101 | CmdBlkP->Packet.dest_port = BOOT_RUP; |
| 102 | CmdBlkP->Packet.src_unit = 0; |
| 103 | CmdBlkP->Packet.src_port = BOOT_RUP; |
| 104 | CmdBlkP->Packet.len = 0x84; |
| 105 | CmdBlkP->Packet.data[0] = IFOAD; |
| 106 | CmdBlkP->Packet.data[1] = 0; |
| 107 | CmdBlkP->Packet.data[2] = IFOAD_MAGIC & 0xFF; |
| 108 | CmdBlkP->Packet.data[3] = (IFOAD_MAGIC >> 8) & 0xFF; |
| 109 | |
| 110 | if ( RIOQueueCmdBlk( HostP, MapP->ID-1, CmdBlkP) == RIO_FAIL ) { |
| 111 | rio_dprintk (RIO_DEBUG_CMD, "FOAD RTA: Failed to queue foad command\n"); |
| 112 | return -EIO; |
| 113 | } |
| 114 | return 0; |
| 115 | } |
| 116 | |
| 117 | int |
| 118 | RIOZombieRta(struct Host *HostP, struct Map *MapP) |
| 119 | { |
| 120 | struct CmdBlk *CmdBlkP; |
| 121 | |
| 122 | rio_dprintk (RIO_DEBUG_CMD, "ZOMBIE RTA\n"); |
| 123 | |
| 124 | CmdBlkP = RIOGetCmdBlk(); |
| 125 | |
| 126 | if ( !CmdBlkP ) { |
| 127 | rio_dprintk (RIO_DEBUG_CMD, "ZOMBIE RTA: GetCmdBlk failed\n"); |
| 128 | return -ENXIO; |
| 129 | } |
| 130 | |
| 131 | CmdBlkP->Packet.dest_unit = MapP->ID; |
| 132 | CmdBlkP->Packet.dest_port = BOOT_RUP; |
| 133 | CmdBlkP->Packet.src_unit = 0; |
| 134 | CmdBlkP->Packet.src_port = BOOT_RUP; |
| 135 | CmdBlkP->Packet.len = 0x84; |
| 136 | CmdBlkP->Packet.data[0] = ZOMBIE; |
| 137 | CmdBlkP->Packet.data[1] = 0; |
| 138 | CmdBlkP->Packet.data[2] = ZOMBIE_MAGIC & 0xFF; |
| 139 | CmdBlkP->Packet.data[3] = (ZOMBIE_MAGIC >> 8) & 0xFF; |
| 140 | |
| 141 | if ( RIOQueueCmdBlk( HostP, MapP->ID-1, CmdBlkP) == RIO_FAIL ) { |
| 142 | rio_dprintk (RIO_DEBUG_CMD, "ZOMBIE RTA: Failed to queue zombie command\n"); |
| 143 | return -EIO; |
| 144 | } |
| 145 | return 0; |
| 146 | } |
| 147 | |
| 148 | int |
| 149 | RIOCommandRta(struct rio_info *p, uint RtaUnique, |
| 150 | int (* func)(struct Host *HostP, struct Map *MapP)) |
| 151 | { |
| 152 | uint Host; |
| 153 | |
| 154 | rio_dprintk (RIO_DEBUG_CMD, "Command RTA 0x%x func 0x%x\n", RtaUnique, (int)func); |
| 155 | |
| 156 | if ( !RtaUnique ) |
| 157 | return(0); |
| 158 | |
| 159 | for ( Host = 0; Host < p->RIONumHosts; Host++ ) { |
| 160 | uint Rta; |
| 161 | struct Host *HostP = &p->RIOHosts[Host]; |
| 162 | |
| 163 | for ( Rta = 0; Rta < RTAS_PER_HOST; Rta++ ) { |
| 164 | struct Map *MapP = &HostP->Mapping[Rta]; |
| 165 | |
| 166 | if ( MapP->RtaUniqueNum == RtaUnique ) { |
| 167 | uint Link; |
| 168 | |
| 169 | /* |
| 170 | ** now, lets just check we have a route to it... |
| 171 | ** IF the routing stuff is working, then one of the |
| 172 | ** topology entries for this unit will have a legit |
| 173 | ** route *somewhere*. We care not where - if its got |
| 174 | ** any connections, we can get to it. |
| 175 | */ |
| 176 | for ( Link = 0; Link < LINKS_PER_UNIT; Link++ ) { |
| 177 | if ( MapP->Topology[Link].Unit <= (uchar)MAX_RUP ) { |
| 178 | /* |
| 179 | ** Its worth trying the operation... |
| 180 | */ |
| 181 | return (*func)( HostP, MapP ); |
| 182 | } |
| 183 | } |
| 184 | } |
| 185 | } |
| 186 | } |
| 187 | return -ENXIO; |
| 188 | } |
| 189 | |
| 190 | |
| 191 | int |
| 192 | RIOIdentifyRta(struct rio_info *p, caddr_t arg) |
| 193 | { |
| 194 | uint Host; |
| 195 | |
| 196 | if ( copyin( (int)arg, (caddr_t)&IdRta, sizeof(IdRta) ) == COPYFAIL ) { |
| 197 | rio_dprintk (RIO_DEBUG_CMD, "RIO_IDENTIFY_RTA copy failed\n"); |
| 198 | p->RIOError.Error = COPYIN_FAILED; |
| 199 | return -EFAULT; |
| 200 | } |
| 201 | |
| 202 | for ( Host = 0 ; Host < p->RIONumHosts; Host++ ) { |
| 203 | uint Rta; |
| 204 | struct Host *HostP = &p->RIOHosts[Host]; |
| 205 | |
| 206 | for ( Rta = 0; Rta < RTAS_PER_HOST; Rta++ ) { |
| 207 | struct Map *MapP = &HostP->Mapping[Rta]; |
| 208 | |
| 209 | if ( MapP->RtaUniqueNum == IdRta.RtaUnique ) { |
| 210 | uint Link; |
| 211 | /* |
| 212 | ** now, lets just check we have a route to it... |
| 213 | ** IF the routing stuff is working, then one of the |
| 214 | ** topology entries for this unit will have a legit |
| 215 | ** route *somewhere*. We care not where - if its got |
| 216 | ** any connections, we can get to it. |
| 217 | */ |
| 218 | for ( Link = 0; Link < LINKS_PER_UNIT; Link++ ) { |
| 219 | if ( MapP->Topology[Link].Unit <= (uchar)MAX_RUP ) { |
| 220 | /* |
| 221 | ** Its worth trying the operation... |
| 222 | */ |
| 223 | struct CmdBlk *CmdBlkP; |
| 224 | |
| 225 | rio_dprintk (RIO_DEBUG_CMD, "IDENTIFY RTA\n"); |
| 226 | |
| 227 | CmdBlkP = RIOGetCmdBlk(); |
| 228 | |
| 229 | if ( !CmdBlkP ) { |
| 230 | rio_dprintk (RIO_DEBUG_CMD, "IDENTIFY RTA: GetCmdBlk failed\n"); |
| 231 | return -ENXIO; |
| 232 | } |
| 233 | |
| 234 | CmdBlkP->Packet.dest_unit = MapP->ID; |
| 235 | CmdBlkP->Packet.dest_port = BOOT_RUP; |
| 236 | CmdBlkP->Packet.src_unit = 0; |
| 237 | CmdBlkP->Packet.src_port = BOOT_RUP; |
| 238 | CmdBlkP->Packet.len = 0x84; |
| 239 | CmdBlkP->Packet.data[0] = IDENTIFY; |
| 240 | CmdBlkP->Packet.data[1] = 0; |
| 241 | CmdBlkP->Packet.data[2] = IdRta.ID; |
| 242 | |
| 243 | if ( RIOQueueCmdBlk( HostP, MapP->ID-1, CmdBlkP) == RIO_FAIL ) { |
| 244 | rio_dprintk (RIO_DEBUG_CMD, "IDENTIFY RTA: Failed to queue command\n"); |
| 245 | return -EIO; |
| 246 | } |
| 247 | return 0; |
| 248 | } |
| 249 | } |
| 250 | } |
| 251 | } |
| 252 | } |
| 253 | return -ENOENT; |
| 254 | } |
| 255 | |
| 256 | |
| 257 | int |
| 258 | RIOKillNeighbour(struct rio_info *p, caddr_t arg) |
| 259 | { |
| 260 | uint Host; |
| 261 | uint ID; |
| 262 | struct Host *HostP; |
| 263 | struct CmdBlk *CmdBlkP; |
| 264 | |
| 265 | rio_dprintk (RIO_DEBUG_CMD, "KILL HOST NEIGHBOUR\n"); |
| 266 | |
| 267 | if ( copyin( (int)arg, (caddr_t)&KillUnit, sizeof(KillUnit) ) == COPYFAIL ) { |
| 268 | rio_dprintk (RIO_DEBUG_CMD, "RIO_KILL_NEIGHBOUR copy failed\n"); |
| 269 | p->RIOError.Error = COPYIN_FAILED; |
| 270 | return -EFAULT; |
| 271 | } |
| 272 | |
| 273 | if ( KillUnit.Link > 3 ) |
| 274 | return -ENXIO; |
| 275 | |
| 276 | CmdBlkP = RIOGetCmdBlk(); |
| 277 | |
| 278 | if ( !CmdBlkP ) { |
| 279 | rio_dprintk (RIO_DEBUG_CMD, "UFOAD: GetCmdBlk failed\n"); |
| 280 | return -ENXIO; |
| 281 | } |
| 282 | |
| 283 | CmdBlkP->Packet.dest_unit = 0; |
| 284 | CmdBlkP->Packet.src_unit = 0; |
| 285 | CmdBlkP->Packet.dest_port = BOOT_RUP; |
| 286 | CmdBlkP->Packet.src_port = BOOT_RUP; |
| 287 | CmdBlkP->Packet.len = 0x84; |
| 288 | CmdBlkP->Packet.data[0] = UFOAD; |
| 289 | CmdBlkP->Packet.data[1] = KillUnit.Link; |
| 290 | CmdBlkP->Packet.data[2] = UFOAD_MAGIC & 0xFF; |
| 291 | CmdBlkP->Packet.data[3] = (UFOAD_MAGIC >> 8) & 0xFF; |
| 292 | |
| 293 | for ( Host = 0; Host < p->RIONumHosts; Host++ ) { |
| 294 | ID = 0; |
| 295 | HostP = &p->RIOHosts[Host]; |
| 296 | |
| 297 | if ( HostP->UniqueNum == KillUnit.UniqueNum ) { |
| 298 | if ( RIOQueueCmdBlk( HostP, RTAS_PER_HOST+KillUnit.Link, |
| 299 | CmdBlkP) == RIO_FAIL ) { |
| 300 | rio_dprintk (RIO_DEBUG_CMD, "UFOAD: Failed queue command\n"); |
| 301 | return -EIO; |
| 302 | } |
| 303 | return 0; |
| 304 | } |
| 305 | |
| 306 | for ( ID=0; ID < RTAS_PER_HOST; ID++ ) { |
| 307 | if ( HostP->Mapping[ID].RtaUniqueNum == KillUnit.UniqueNum ) { |
| 308 | CmdBlkP->Packet.dest_unit = ID+1; |
| 309 | if ( RIOQueueCmdBlk( HostP, ID, CmdBlkP) == RIO_FAIL ) { |
| 310 | rio_dprintk (RIO_DEBUG_CMD, "UFOAD: Failed queue command\n"); |
| 311 | return -EIO; |
| 312 | } |
| 313 | return 0; |
| 314 | } |
| 315 | } |
| 316 | } |
| 317 | RIOFreeCmdBlk( CmdBlkP ); |
| 318 | return -ENXIO; |
| 319 | } |
| 320 | |
| 321 | int |
| 322 | RIOSuspendBootRta(struct Host *HostP, int ID, int Link) |
| 323 | { |
| 324 | struct CmdBlk *CmdBlkP; |
| 325 | |
| 326 | rio_dprintk (RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA ID %d, link %c\n", ID, 'A' + Link); |
| 327 | |
| 328 | CmdBlkP = RIOGetCmdBlk(); |
| 329 | |
| 330 | if ( !CmdBlkP ) { |
| 331 | rio_dprintk (RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: GetCmdBlk failed\n"); |
| 332 | return -ENXIO; |
| 333 | } |
| 334 | |
| 335 | CmdBlkP->Packet.dest_unit = ID; |
| 336 | CmdBlkP->Packet.dest_port = BOOT_RUP; |
| 337 | CmdBlkP->Packet.src_unit = 0; |
| 338 | CmdBlkP->Packet.src_port = BOOT_RUP; |
| 339 | CmdBlkP->Packet.len = 0x84; |
| 340 | CmdBlkP->Packet.data[0] = IWAIT; |
| 341 | CmdBlkP->Packet.data[1] = Link; |
| 342 | CmdBlkP->Packet.data[2] = IWAIT_MAGIC & 0xFF; |
| 343 | CmdBlkP->Packet.data[3] = (IWAIT_MAGIC >> 8) & 0xFF; |
| 344 | |
| 345 | if ( RIOQueueCmdBlk( HostP, ID - 1, CmdBlkP) == RIO_FAIL ) { |
| 346 | rio_dprintk (RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: Failed to queue iwait command\n"); |
| 347 | return -EIO; |
| 348 | } |
| 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | int |
| 353 | RIOFoadWakeup(struct rio_info *p) |
| 354 | { |
| 355 | int port; |
| 356 | register struct Port *PortP; |
| 357 | unsigned long flags; |
| 358 | |
| 359 | for ( port=0; port<RIO_PORTS; port++) { |
| 360 | PortP = p->RIOPortp[port]; |
| 361 | |
| 362 | rio_spin_lock_irqsave(&PortP->portSem, flags); |
| 363 | PortP->Config = 0; |
| 364 | PortP->State = 0; |
| 365 | PortP->InUse = NOT_INUSE; |
| 366 | PortP->PortState = 0; |
| 367 | PortP->FlushCmdBodge = 0; |
| 368 | PortP->ModemLines = 0; |
| 369 | PortP->ModemState = 0; |
| 370 | PortP->CookMode = 0; |
| 371 | PortP->ParamSem = 0; |
| 372 | PortP->Mapped = 0; |
| 373 | PortP->WflushFlag = 0; |
| 374 | PortP->MagicFlags = 0; |
| 375 | PortP->RxDataStart = 0; |
| 376 | PortP->TxBufferIn = 0; |
| 377 | PortP->TxBufferOut = 0; |
| 378 | rio_spin_unlock_irqrestore(&PortP->portSem, flags); |
| 379 | } |
| 380 | return(0); |
| 381 | } |
| 382 | |
| 383 | /* |
| 384 | ** Incoming command on the COMMAND_RUP to be processed. |
| 385 | */ |
| 386 | static int |
| 387 | RIOCommandRup(struct rio_info *p, uint Rup, struct Host *HostP, PKT *PacketP) |
| 388 | { |
| 389 | struct PktCmd *PktCmdP = (struct PktCmd *)PacketP->data; |
| 390 | struct Port *PortP; |
| 391 | struct UnixRup *UnixRupP; |
| 392 | ushort SysPort; |
| 393 | ushort ReportedModemStatus; |
| 394 | ushort rup; |
| 395 | ushort subCommand; |
| 396 | unsigned long flags; |
| 397 | |
| 398 | func_enter (); |
| 399 | |
| 400 | #ifdef CHECK |
| 401 | CheckHost( Host ); |
| 402 | CheckHostP( HostP ); |
| 403 | CheckPacketP( PacketP ); |
| 404 | #endif |
| 405 | |
| 406 | /* |
| 407 | ** 16 port RTA note: |
| 408 | ** Command rup packets coming from the RTA will have pkt->data[1] (which |
| 409 | ** translates to PktCmdP->PhbNum) set to the host port number for the |
| 410 | ** particular unit. To access the correct BaseSysPort for a 16 port RTA, |
| 411 | ** we can use PhbNum to get the rup number for the appropriate 8 port |
| 412 | ** block (for the first block, this should be equal to 'Rup'). |
| 413 | */ |
| 414 | rup = RBYTE(PktCmdP->PhbNum) / (ushort)PORTS_PER_RTA; |
| 415 | UnixRupP = &HostP->UnixRups[rup]; |
| 416 | SysPort = UnixRupP->BaseSysPort + |
| 417 | (RBYTE(PktCmdP->PhbNum) % (ushort)PORTS_PER_RTA); |
| 418 | rio_dprintk (RIO_DEBUG_CMD, "Command on rup %d, port %d\n", rup, SysPort); |
| 419 | |
| 420 | #ifdef CHECK |
| 421 | CheckRup( rup ); |
| 422 | CheckUnixRupP( UnixRupP ); |
| 423 | #endif |
| 424 | if ( UnixRupP->BaseSysPort == NO_PORT ) { |
| 425 | rio_dprintk (RIO_DEBUG_CMD, "OBSCURE ERROR!\n"); |
| 426 | rio_dprintk (RIO_DEBUG_CMD, "Diagnostics follow. Please WRITE THESE DOWN and report them to Specialix Technical Support\n"); |
| 427 | rio_dprintk (RIO_DEBUG_CMD, "CONTROL information: Host number %d, name ``%s''\n", |
| 428 | HostP-p->RIOHosts, HostP->Name ); |
| 429 | rio_dprintk (RIO_DEBUG_CMD, "CONTROL information: Rup number 0x%x\n", rup); |
| 430 | |
| 431 | if ( Rup >= (ushort)MAX_RUP ) { |
| 432 | rio_dprintk (RIO_DEBUG_CMD, "CONTROL information: This is the RUP for RTA ``%s''\n", |
| 433 | HostP->Mapping[Rup].Name); |
| 434 | } else |
| 435 | rio_dprintk (RIO_DEBUG_CMD, "CONTROL information: This is the RUP for link ``%c'' of host ``%s''\n", |
| 436 | ('A' + Rup - MAX_RUP), HostP->Name); |
| 437 | |
| 438 | rio_dprintk (RIO_DEBUG_CMD, "PACKET information: Destination 0x%x:0x%x\n", |
| 439 | PacketP->dest_unit, PacketP->dest_port ); |
| 440 | rio_dprintk (RIO_DEBUG_CMD, "PACKET information: Source 0x%x:0x%x\n", |
| 441 | PacketP->src_unit, PacketP->src_port ); |
| 442 | rio_dprintk (RIO_DEBUG_CMD, "PACKET information: Length 0x%x (%d)\n", PacketP->len,PacketP->len ); |
| 443 | rio_dprintk (RIO_DEBUG_CMD, "PACKET information: Control 0x%x (%d)\n", PacketP->control, PacketP->control); |
| 444 | rio_dprintk (RIO_DEBUG_CMD, "PACKET information: Check 0x%x (%d)\n", PacketP->csum, PacketP->csum ); |
| 445 | rio_dprintk (RIO_DEBUG_CMD, "COMMAND information: Host Port Number 0x%x, " |
| 446 | "Command Code 0x%x\n", PktCmdP->PhbNum, PktCmdP->Command ); |
| 447 | return TRUE; |
| 448 | } |
| 449 | |
| 450 | #ifdef CHECK |
| 451 | CheckSysPort( SysPort ); |
| 452 | #endif |
| 453 | PortP = p->RIOPortp[ SysPort ]; |
| 454 | rio_spin_lock_irqsave(&PortP->portSem, flags); |
| 455 | switch( RBYTE(PktCmdP->Command) ) { |
| 456 | case BREAK_RECEIVED: |
| 457 | rio_dprintk (RIO_DEBUG_CMD, "Received a break!\n"); |
| 458 | /* If the current line disc. is not multi-threading and |
| 459 | the current processor is not the default, reset rup_intr |
| 460 | and return FALSE to ensure that the command packet is |
| 461 | not freed. */ |
| 462 | /* Call tmgr HANGUP HERE */ |
| 463 | /* Fix this later when every thing works !!!! RAMRAJ */ |
| 464 | gs_got_break (&PortP->gs); |
| 465 | break; |
| 466 | |
| 467 | case COMPLETE: |
| 468 | rio_dprintk (RIO_DEBUG_CMD, "Command complete on phb %d host %d\n", |
| 469 | RBYTE(PktCmdP->PhbNum), HostP-p->RIOHosts); |
| 470 | subCommand = 1; |
| 471 | switch (RBYTE(PktCmdP->SubCommand)) { |
| 472 | case MEMDUMP : |
| 473 | rio_dprintk (RIO_DEBUG_CMD, "Memory dump cmd (0x%x) from addr 0x%x\n", |
| 474 | RBYTE(PktCmdP->SubCommand), RWORD(PktCmdP->SubAddr)); |
| 475 | break; |
| 476 | case READ_REGISTER : |
| 477 | rio_dprintk (RIO_DEBUG_CMD, "Read register (0x%x)\n", RWORD(PktCmdP->SubAddr)); |
| 478 | p->CdRegister = (RBYTE(PktCmdP->ModemStatus) & MSVR1_HOST); |
| 479 | break; |
| 480 | default : |
| 481 | subCommand = 0; |
| 482 | break; |
| 483 | } |
| 484 | if (subCommand) |
| 485 | break; |
| 486 | rio_dprintk (RIO_DEBUG_CMD, "New status is 0x%x was 0x%x\n", |
| 487 | RBYTE(PktCmdP->PortStatus),PortP->PortState); |
| 488 | if (PortP->PortState != RBYTE(PktCmdP->PortStatus)) { |
| 489 | rio_dprintk (RIO_DEBUG_CMD, "Mark status & wakeup\n"); |
| 490 | PortP->PortState = RBYTE(PktCmdP->PortStatus); |
| 491 | /* What should we do here ... |
| 492 | wakeup( &PortP->PortState ); |
| 493 | */ |
| 494 | } else |
| 495 | rio_dprintk (RIO_DEBUG_CMD, "No change\n"); |
| 496 | |
| 497 | /* FALLTHROUGH */ |
| 498 | case MODEM_STATUS: |
| 499 | /* |
| 500 | ** Knock out the tbusy and tstop bits, as these are not relevant |
| 501 | ** to the check for modem status change (they're just there because |
| 502 | ** it's a convenient place to put them!). |
| 503 | */ |
| 504 | ReportedModemStatus = RBYTE(PktCmdP->ModemStatus); |
| 505 | if ((PortP->ModemState & MSVR1_HOST) == |
| 506 | (ReportedModemStatus & MSVR1_HOST)) { |
| 507 | rio_dprintk (RIO_DEBUG_CMD, "Modem status unchanged 0x%x\n", PortP->ModemState); |
| 508 | /* |
| 509 | ** Update ModemState just in case tbusy or tstop states have |
| 510 | ** changed. |
| 511 | */ |
| 512 | PortP->ModemState = ReportedModemStatus; |
| 513 | } |
| 514 | else { |
| 515 | rio_dprintk (RIO_DEBUG_CMD, "Modem status change from 0x%x to 0x%x\n", |
| 516 | PortP->ModemState, ReportedModemStatus); |
| 517 | PortP->ModemState = ReportedModemStatus; |
| 518 | #ifdef MODEM_SUPPORT |
| 519 | if ( PortP->Mapped ) { |
| 520 | /***********************************************************\ |
| 521 | ************************************************************* |
| 522 | *** *** |
| 523 | *** M O D E M S T A T E C H A N G E *** |
| 524 | *** *** |
| 525 | ************************************************************* |
| 526 | \***********************************************************/ |
| 527 | /* |
| 528 | ** If the device is a modem, then check the modem |
| 529 | ** carrier. |
| 530 | */ |
| 531 | if (PortP->gs.tty == NULL) |
| 532 | break; |
| 533 | if (PortP->gs.tty->termios == NULL) |
| 534 | break; |
| 535 | |
| 536 | if (!(PortP->gs.tty->termios->c_cflag & CLOCAL) && |
| 537 | ((PortP->State & (RIO_MOPEN|RIO_WOPEN)))) { |
| 538 | |
| 539 | rio_dprintk (RIO_DEBUG_CMD, "Is there a Carrier?\n"); |
| 540 | /* |
| 541 | ** Is there a carrier? |
| 542 | */ |
| 543 | if ( PortP->ModemState & MSVR1_CD ) { |
| 544 | /* |
| 545 | ** Has carrier just appeared? |
| 546 | */ |
| 547 | if (!(PortP->State & RIO_CARR_ON)) { |
| 548 | rio_dprintk (RIO_DEBUG_CMD, "Carrier just came up.\n"); |
| 549 | PortP->State |= RIO_CARR_ON; |
| 550 | /* |
| 551 | ** wakeup anyone in WOPEN |
| 552 | */ |
| 553 | if (PortP->State & (PORT_ISOPEN | RIO_WOPEN) ) |
| 554 | wake_up_interruptible (&PortP->gs.open_wait); |
| 555 | #ifdef STATS |
| 556 | PortP->Stat.ModemOnCnt++; |
| 557 | #endif |
| 558 | } |
| 559 | } else { |
| 560 | /* |
| 561 | ** Has carrier just dropped? |
| 562 | */ |
| 563 | if (PortP->State & RIO_CARR_ON) { |
| 564 | if (PortP->State & (PORT_ISOPEN|RIO_WOPEN|RIO_MOPEN)) |
| 565 | tty_hangup (PortP->gs.tty); |
| 566 | PortP->State &= ~RIO_CARR_ON; |
| 567 | rio_dprintk (RIO_DEBUG_CMD, "Carrirer just went down\n"); |
| 568 | #ifdef STATS |
| 569 | PortP->Stat.ModemOffCnt++; |
| 570 | #endif |
| 571 | } |
| 572 | } |
| 573 | } |
| 574 | } |
| 575 | #endif |
| 576 | } |
| 577 | break; |
| 578 | |
| 579 | default: |
| 580 | rio_dprintk (RIO_DEBUG_CMD, "Unknown command %d on CMD_RUP of host %d\n", |
| 581 | RBYTE(PktCmdP->Command),HostP-p->RIOHosts); |
| 582 | break; |
| 583 | } |
| 584 | rio_spin_unlock_irqrestore(&PortP->portSem, flags); |
| 585 | |
| 586 | func_exit (); |
| 587 | |
| 588 | return TRUE; |
| 589 | } |
| 590 | /* |
| 591 | ** The command mechanism: |
| 592 | ** Each rup has a chain of commands associated with it. |
| 593 | ** This chain is maintained by routines in this file. |
| 594 | ** Periodically we are called and we run a quick check of all the |
| 595 | ** active chains to determine if there is a command to be executed, |
| 596 | ** and if the rup is ready to accept it. |
| 597 | ** |
| 598 | */ |
| 599 | |
| 600 | /* |
| 601 | ** Allocate an empty command block. |
| 602 | */ |
| 603 | struct CmdBlk * |
| 604 | RIOGetCmdBlk(void) |
| 605 | { |
| 606 | struct CmdBlk *CmdBlkP; |
| 607 | |
| 608 | CmdBlkP = (struct CmdBlk *)sysbrk(sizeof(struct CmdBlk)); |
| 609 | if (CmdBlkP) |
| 610 | bzero(CmdBlkP, sizeof(struct CmdBlk)); |
| 611 | |
| 612 | return CmdBlkP; |
| 613 | } |
| 614 | |
| 615 | /* |
| 616 | ** Return a block to the head of the free list. |
| 617 | */ |
| 618 | void |
| 619 | RIOFreeCmdBlk(struct CmdBlk *CmdBlkP) |
| 620 | { |
| 621 | sysfree((void *)CmdBlkP, sizeof(struct CmdBlk)); |
| 622 | } |
| 623 | |
| 624 | /* |
| 625 | ** attach a command block to the list of commands to be performed for |
| 626 | ** a given rup. |
| 627 | */ |
| 628 | int |
| 629 | RIOQueueCmdBlk(struct Host *HostP, uint Rup, struct CmdBlk *CmdBlkP) |
| 630 | { |
| 631 | struct CmdBlk **Base; |
| 632 | struct UnixRup *UnixRupP; |
| 633 | unsigned long flags; |
| 634 | |
| 635 | #ifdef CHECK |
| 636 | CheckHostP( HostP ); |
| 637 | CheckRup( Rup ); |
| 638 | CheckCmdBlkP( CmdBlkP ); |
| 639 | #endif |
| 640 | if ( Rup >= (ushort)(MAX_RUP+LINKS_PER_UNIT) ) { |
| 641 | rio_dprintk (RIO_DEBUG_CMD, "Illegal rup number %d in RIOQueueCmdBlk\n",Rup); |
| 642 | RIOFreeCmdBlk( CmdBlkP ); |
| 643 | return RIO_FAIL; |
| 644 | } |
| 645 | |
| 646 | UnixRupP = &HostP->UnixRups[Rup]; |
| 647 | |
| 648 | rio_spin_lock_irqsave(&UnixRupP->RupLock, flags); |
| 649 | |
| 650 | /* |
| 651 | ** If the RUP is currently inactive, then put the request |
| 652 | ** straight on the RUP.... |
| 653 | */ |
| 654 | if ( (UnixRupP->CmdsWaitingP == NULL) && (UnixRupP->CmdPendingP == NULL) && |
| 655 | (RWORD(UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE ) && |
| 656 | (CmdBlkP->PreFuncP ? (*CmdBlkP->PreFuncP)(CmdBlkP->PreArg,CmdBlkP) |
| 657 | :TRUE)) { |
| 658 | rio_dprintk (RIO_DEBUG_CMD, "RUP inactive-placing command straight on. Cmd byte is 0x%x\n", |
| 659 | CmdBlkP->Packet.data[0]); |
| 660 | |
| 661 | /* |
| 662 | ** Whammy! blat that pack! |
| 663 | */ |
| 664 | HostP->Copy( (caddr_t)&CmdBlkP->Packet, |
| 665 | RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt ), sizeof(PKT) ); |
| 666 | |
| 667 | /* |
| 668 | ** place command packet on the pending position. |
| 669 | */ |
| 670 | UnixRupP->CmdPendingP = CmdBlkP; |
| 671 | |
| 672 | /* |
| 673 | ** set the command register |
| 674 | */ |
| 675 | WWORD(UnixRupP->RupP->txcontrol , TX_PACKET_READY); |
| 676 | |
| 677 | rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags); |
| 678 | |
| 679 | return RIO_SUCCESS; |
| 680 | } |
| 681 | rio_dprintk (RIO_DEBUG_CMD, "RUP active - en-queing\n"); |
| 682 | |
| 683 | if ( UnixRupP->CmdsWaitingP != NULL) |
| 684 | rio_dprintk (RIO_DEBUG_CMD, "Rup active - command waiting\n"); |
| 685 | if ( UnixRupP->CmdPendingP != NULL ) |
| 686 | rio_dprintk (RIO_DEBUG_CMD, "Rup active - command pending\n"); |
| 687 | if ( RWORD(UnixRupP->RupP->txcontrol) != TX_RUP_INACTIVE ) |
| 688 | rio_dprintk (RIO_DEBUG_CMD, "Rup active - command rup not ready\n"); |
| 689 | |
| 690 | Base = &UnixRupP->CmdsWaitingP; |
| 691 | |
| 692 | rio_dprintk (RIO_DEBUG_CMD, "First try to queue cmdblk 0x%x at 0x%x\n", (int)CmdBlkP,(int)Base); |
| 693 | |
| 694 | while ( *Base ) { |
| 695 | rio_dprintk (RIO_DEBUG_CMD, "Command cmdblk 0x%x here\n", (int)(*Base)); |
| 696 | Base = &((*Base)->NextP); |
| 697 | rio_dprintk (RIO_DEBUG_CMD, "Now try to queue cmd cmdblk 0x%x at 0x%x\n", |
| 698 | (int)CmdBlkP,(int)Base); |
| 699 | } |
| 700 | |
| 701 | rio_dprintk (RIO_DEBUG_CMD, "Will queue cmdblk 0x%x at 0x%x\n",(int)CmdBlkP,(int)Base); |
| 702 | |
| 703 | *Base = CmdBlkP; |
| 704 | |
| 705 | CmdBlkP->NextP = NULL; |
| 706 | |
| 707 | rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags); |
| 708 | |
| 709 | return RIO_SUCCESS; |
| 710 | } |
| 711 | |
| 712 | /* |
| 713 | ** Here we go - if there is an empty rup, fill it! |
| 714 | ** must be called at splrio() or higher. |
| 715 | */ |
| 716 | void |
| 717 | RIOPollHostCommands(struct rio_info *p, struct Host *HostP) |
| 718 | { |
| 719 | register struct CmdBlk *CmdBlkP; |
| 720 | register struct UnixRup *UnixRupP; |
| 721 | struct PKT *PacketP; |
| 722 | ushort Rup; |
| 723 | unsigned long flags; |
| 724 | |
| 725 | |
| 726 | Rup = MAX_RUP+LINKS_PER_UNIT; |
| 727 | |
| 728 | do { /* do this loop for each RUP */ |
| 729 | /* |
| 730 | ** locate the rup we are processing & lock it |
| 731 | */ |
| 732 | UnixRupP = &HostP->UnixRups[--Rup]; |
| 733 | |
| 734 | spin_lock_irqsave(&UnixRupP->RupLock, flags); |
| 735 | |
| 736 | /* |
| 737 | ** First check for incoming commands: |
| 738 | */ |
| 739 | if ( RWORD(UnixRupP->RupP->rxcontrol) != RX_RUP_INACTIVE ) { |
| 740 | int FreeMe; |
| 741 | |
| 742 | PacketP =(PKT *)RIO_PTR(HostP->Caddr,RWORD(UnixRupP->RupP->rxpkt)); |
| 743 | |
| 744 | ShowPacket( DBG_CMD, PacketP ); |
| 745 | |
| 746 | switch ( RBYTE(PacketP->dest_port) ) { |
| 747 | case BOOT_RUP: |
| 748 | rio_dprintk (RIO_DEBUG_CMD, "Incoming Boot %s packet '%x'\n", |
| 749 | RBYTE(PacketP->len) & 0x80 ? "Command":"Data", |
| 750 | RBYTE(PacketP->data[0])); |
| 751 | rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags); |
| 752 | FreeMe= RIOBootRup(p, Rup,HostP,PacketP); |
| 753 | rio_spin_lock_irqsave(&UnixRupP->RupLock, flags); |
| 754 | break; |
| 755 | |
| 756 | case COMMAND_RUP: |
| 757 | /* |
| 758 | ** Free the RUP lock as loss of carrier causes a |
| 759 | ** ttyflush which will (eventually) call another |
| 760 | ** routine that uses the RUP lock. |
| 761 | */ |
| 762 | rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags); |
| 763 | FreeMe= RIOCommandRup(p, Rup,HostP,PacketP); |
| 764 | if (PacketP->data[5] == MEMDUMP) { |
| 765 | rio_dprintk (RIO_DEBUG_CMD, "Memdump from 0x%x complete\n", |
| 766 | *(ushort *) &(PacketP->data[6])); |
| 767 | HostP->Copy( (caddr_t)&(PacketP->data[8]), |
| 768 | (caddr_t)p->RIOMemDump, 32 ); |
| 769 | } |
| 770 | rio_spin_lock_irqsave(&UnixRupP->RupLock, flags); |
| 771 | break; |
| 772 | |
| 773 | case ROUTE_RUP: |
| 774 | rio_spin_unlock_irqrestore( &UnixRupP->RupLock, flags); |
| 775 | FreeMe = RIORouteRup(p, Rup, HostP, PacketP ); |
| 776 | rio_spin_lock_irqsave( &UnixRupP->RupLock, flags ); |
| 777 | break; |
| 778 | |
| 779 | default: |
| 780 | rio_dprintk (RIO_DEBUG_CMD, "Unknown RUP %d\n", RBYTE(PacketP->dest_port)); |
| 781 | FreeMe = 1; |
| 782 | break; |
| 783 | } |
| 784 | |
| 785 | if ( FreeMe ) { |
| 786 | rio_dprintk (RIO_DEBUG_CMD, "Free processed incoming command packet\n"); |
| 787 | put_free_end(HostP,PacketP); |
| 788 | |
| 789 | WWORD(UnixRupP->RupP->rxcontrol , RX_RUP_INACTIVE); |
| 790 | |
| 791 | if ( RWORD(UnixRupP->RupP->handshake)==PHB_HANDSHAKE_SET ) { |
| 792 | rio_dprintk (RIO_DEBUG_CMD, "Handshake rup %d\n",Rup); |
| 793 | WWORD(UnixRupP->RupP->handshake, |
| 794 | PHB_HANDSHAKE_SET|PHB_HANDSHAKE_RESET); |
| 795 | } |
| 796 | } |
| 797 | } |
| 798 | |
| 799 | /* |
| 800 | ** IF a command was running on the port, |
| 801 | ** and it has completed, then tidy it up. |
| 802 | */ |
| 803 | if ( (CmdBlkP = UnixRupP->CmdPendingP) && /* ASSIGN! */ |
| 804 | (RWORD(UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) { |
| 805 | /* |
| 806 | ** we are idle. |
| 807 | ** there is a command in pending. |
| 808 | ** Therefore, this command has finished. |
| 809 | ** So, wakeup whoever is waiting for it (and tell them |
| 810 | ** what happened). |
| 811 | */ |
| 812 | if ( CmdBlkP->Packet.dest_port == BOOT_RUP ) |
| 813 | rio_dprintk (RIO_DEBUG_CMD, "Free Boot %s Command Block '%x'\n", |
| 814 | CmdBlkP->Packet.len & 0x80 ? "Command":"Data", |
| 815 | CmdBlkP->Packet.data[0]); |
| 816 | |
| 817 | rio_dprintk (RIO_DEBUG_CMD, "Command 0x%x completed\n",(int)CmdBlkP); |
| 818 | |
| 819 | /* |
| 820 | ** Clear the Rup lock to prevent mutual exclusion. |
| 821 | */ |
| 822 | if ( CmdBlkP->PostFuncP ) { |
| 823 | rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags); |
| 824 | (*CmdBlkP->PostFuncP) (CmdBlkP->PostArg,CmdBlkP); |
| 825 | rio_spin_lock_irqsave(&UnixRupP->RupLock, flags); |
| 826 | } |
| 827 | |
| 828 | /* |
| 829 | ** ....clear the pending flag.... |
| 830 | */ |
| 831 | UnixRupP->CmdPendingP = NULL; |
| 832 | |
| 833 | /* |
| 834 | ** ....and return the command block to the freelist. |
| 835 | */ |
| 836 | RIOFreeCmdBlk( CmdBlkP ); |
| 837 | } |
| 838 | |
| 839 | /* |
| 840 | ** If there is a command for this rup, and the rup |
| 841 | ** is idle, then process the command |
| 842 | */ |
| 843 | if ( (CmdBlkP = UnixRupP->CmdsWaitingP) && /* ASSIGN! */ |
| 844 | (UnixRupP->CmdPendingP == NULL) && |
| 845 | (RWORD(UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) { |
| 846 | /* |
| 847 | ** if the pre-function is non-zero, call it. |
| 848 | ** If it returns RIO_FAIL then don't |
| 849 | ** send this command yet! |
| 850 | */ |
| 851 | #ifdef CHECK |
| 852 | CheckCmdBlkP (CmdBlkP); |
| 853 | #endif |
| 854 | if ( !(CmdBlkP->PreFuncP ? |
| 855 | (*CmdBlkP->PreFuncP)(CmdBlkP->PreArg, CmdBlkP) : TRUE)) { |
| 856 | rio_dprintk (RIO_DEBUG_CMD, "Not ready to start command 0x%x\n",(int)CmdBlkP); |
| 857 | } |
| 858 | else { |
| 859 | rio_dprintk (RIO_DEBUG_CMD, "Start new command 0x%x Cmd byte is 0x%x\n", |
| 860 | (int)CmdBlkP, CmdBlkP->Packet.data[0]); |
| 861 | /* |
| 862 | ** Whammy! blat that pack! |
| 863 | */ |
| 864 | #ifdef CHECK |
| 865 | CheckPacketP ((PKT *)RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt)); |
| 866 | #endif |
| 867 | HostP->Copy( (caddr_t)&CmdBlkP->Packet, |
| 868 | RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt), sizeof(PKT)); |
| 869 | |
| 870 | /* |
| 871 | ** remove the command from the rup command queue... |
| 872 | */ |
| 873 | UnixRupP->CmdsWaitingP = CmdBlkP->NextP; |
| 874 | |
| 875 | /* |
| 876 | ** ...and place it on the pending position. |
| 877 | */ |
| 878 | UnixRupP->CmdPendingP = CmdBlkP; |
| 879 | |
| 880 | /* |
| 881 | ** set the command register |
| 882 | */ |
| 883 | WWORD(UnixRupP->RupP->txcontrol,TX_PACKET_READY); |
| 884 | |
| 885 | /* |
| 886 | ** the command block will be freed |
| 887 | ** when the command has been processed. |
| 888 | */ |
| 889 | } |
| 890 | } |
| 891 | spin_unlock_irqrestore(&UnixRupP->RupLock, flags); |
| 892 | } while ( Rup ); |
| 893 | } |
| 894 | |
| 895 | int |
| 896 | RIOWFlushMark(int iPortP, struct CmdBlk *CmdBlkP) |
| 897 | { |
| 898 | struct Port * PortP = (struct Port *)iPortP; |
| 899 | unsigned long flags; |
| 900 | |
| 901 | rio_spin_lock_irqsave(&PortP->portSem, flags); |
| 902 | #ifdef CHECK |
| 903 | CheckPortP( PortP ); |
| 904 | #endif |
| 905 | PortP->WflushFlag++; |
| 906 | PortP->MagicFlags |= MAGIC_FLUSH; |
| 907 | rio_spin_unlock_irqrestore(&PortP->portSem, flags); |
| 908 | return RIOUnUse( iPortP, CmdBlkP ); |
| 909 | } |
| 910 | |
| 911 | int |
| 912 | RIORFlushEnable(int iPortP, struct CmdBlk *CmdBlkP) |
| 913 | { |
| 914 | struct Port * PortP = (struct Port *)iPortP; |
| 915 | PKT *PacketP; |
| 916 | unsigned long flags; |
| 917 | |
| 918 | rio_spin_lock_irqsave(&PortP->portSem, flags); |
| 919 | |
| 920 | while ( can_remove_receive(&PacketP, PortP) ) { |
| 921 | remove_receive(PortP); |
| 922 | ShowPacket(DBG_PROC, PacketP ); |
| 923 | put_free_end( PortP->HostP, PacketP ); |
| 924 | } |
| 925 | |
| 926 | if ( RWORD(PortP->PhbP->handshake)==PHB_HANDSHAKE_SET ) { |
| 927 | /* |
| 928 | ** MAGIC! (Basically, handshake the RX buffer, so that |
| 929 | ** the RTAs upstream can be re-enabled.) |
| 930 | */ |
| 931 | rio_dprintk (RIO_DEBUG_CMD, "Util: Set RX handshake bit\n"); |
| 932 | WWORD(PortP->PhbP->handshake, PHB_HANDSHAKE_SET|PHB_HANDSHAKE_RESET); |
| 933 | } |
| 934 | rio_spin_unlock_irqrestore(&PortP->portSem, flags); |
| 935 | return RIOUnUse( iPortP, CmdBlkP ); |
| 936 | } |
| 937 | |
| 938 | int |
| 939 | RIOUnUse(int iPortP, struct CmdBlk *CmdBlkP) |
| 940 | { |
| 941 | struct Port * PortP = (struct Port *)iPortP; |
| 942 | unsigned long flags; |
| 943 | |
| 944 | rio_spin_lock_irqsave(&PortP->portSem, flags); |
| 945 | |
| 946 | #ifdef CHECK |
| 947 | CheckPortP( PortP ); |
| 948 | #endif |
| 949 | rio_dprintk (RIO_DEBUG_CMD, "Decrement in use count for port\n"); |
| 950 | |
| 951 | if (PortP->InUse) { |
| 952 | if ( --PortP->InUse != NOT_INUSE ) { |
| 953 | rio_spin_unlock_irqrestore(&PortP->portSem, flags); |
| 954 | return 0; |
| 955 | } |
| 956 | } |
| 957 | /* |
| 958 | ** While PortP->InUse is set (i.e. a preemptive command has been sent to |
| 959 | ** the RTA and is awaiting completion), any transmit data is prevented from |
| 960 | ** being transferred from the write queue into the transmit packets |
| 961 | ** (add_transmit) and no furthur transmit interrupt will be sent for that |
| 962 | ** data. The next interrupt will occur up to 500ms later (RIOIntr is called |
| 963 | ** twice a second as a saftey measure). This was the case when kermit was |
| 964 | ** used to send data into a RIO port. After each packet was sent, TCFLSH |
| 965 | ** was called to flush the read queue preemptively. PortP->InUse was |
| 966 | ** incremented, thereby blocking the 6 byte acknowledgement packet |
| 967 | ** transmitted back. This acknowledgment hung around for 500ms before |
| 968 | ** being sent, thus reducing input performance substantially!. |
| 969 | ** When PortP->InUse becomes NOT_INUSE, we must ensure that any data |
| 970 | ** hanging around in the transmit buffer is sent immediately. |
| 971 | */ |
| 972 | WWORD(PortP->HostP->ParmMapP->tx_intr, 1); |
| 973 | /* What to do here .. |
| 974 | wakeup( (caddr_t)&(PortP->InUse) ); |
| 975 | */ |
| 976 | rio_spin_unlock_irqrestore(&PortP->portSem, flags); |
| 977 | return 0; |
| 978 | } |
| 979 | |
| 980 | void |
| 981 | ShowPacket(uint Flags, struct PKT *PacketP) |
| 982 | { |
| 983 | } |
| 984 | |
| 985 | /* |
| 986 | ** |
| 987 | ** How to use this file: |
| 988 | ** |
| 989 | ** To send a command down a rup, you need to allocate a command block, fill |
| 990 | ** in the packet information, fill in the command number, fill in the pre- |
| 991 | ** and post- functions and arguments, and then add the command block to the |
| 992 | ** queue of command blocks for the port in question. When the port is idle, |
| 993 | ** then the pre-function will be called. If this returns RIO_FAIL then the |
| 994 | ** command will be re-queued and tried again at a later date (probably in one |
| 995 | ** clock tick). If the pre-function returns NOT RIO_FAIL, then the command |
| 996 | ** packet will be queued on the RUP, and the txcontrol field set to the |
| 997 | ** command number. When the txcontrol field has changed from being the |
| 998 | ** command number, then the post-function will be called, with the argument |
| 999 | ** specified earlier, a pointer to the command block, and the value of |
| 1000 | ** txcontrol. |
| 1001 | ** |
| 1002 | ** To allocate a command block, call RIOGetCmdBlk(). This returns a pointer |
| 1003 | ** to the command block structure allocated, or NULL if there aren't any. |
| 1004 | ** The block will have been zeroed for you. |
| 1005 | ** |
| 1006 | ** The structure has the following fields: |
| 1007 | ** |
| 1008 | ** struct CmdBlk |
| 1009 | ** { |
| 1010 | ** struct CmdBlk *NextP; ** Pointer to next command block ** |
| 1011 | ** struct PKT Packet; ** A packet, to copy to the rup ** |
| 1012 | ** int (*PreFuncP)(); ** The func to call to check if OK ** |
| 1013 | ** int PreArg; ** The arg for the func ** |
| 1014 | ** int (*PostFuncP)(); ** The func to call when completed ** |
| 1015 | ** int PostArg; ** The arg for the func ** |
| 1016 | ** }; |
| 1017 | ** |
| 1018 | ** You need to fill in ALL fields EXCEPT NextP, which is used to link the |
| 1019 | ** blocks together either on the free list or on the Rup list. |
| 1020 | ** |
| 1021 | ** Packet is an actual packet structure to be filled in with the packet |
| 1022 | ** information associated with the command. You need to fill in everything, |
| 1023 | ** as the command processore doesn't process the command packet in any way. |
| 1024 | ** |
| 1025 | ** The PreFuncP is called before the packet is enqueued on the host rup. |
| 1026 | ** PreFuncP is called as (*PreFuncP)(PreArg, CmdBlkP);. PreFuncP must |
| 1027 | ** return !RIO_FAIL to have the packet queued on the rup, and RIO_FAIL |
| 1028 | ** if the packet is NOT to be queued. |
| 1029 | ** |
| 1030 | ** The PostFuncP is called when the command has completed. It is called |
| 1031 | ** as (*PostFuncP)(PostArg, CmdBlkP, txcontrol);. PostFuncP is not expected |
| 1032 | ** to return a value. PostFuncP does NOT need to free the command block, |
| 1033 | ** as this happens automatically after PostFuncP returns. |
| 1034 | ** |
| 1035 | ** Once the command block has been filled in, it is attached to the correct |
| 1036 | ** queue by calling RIOQueueCmdBlk( HostP, Rup, CmdBlkP ) where HostP is |
| 1037 | ** a pointer to the struct Host, Rup is the NUMBER of the rup (NOT a pointer |
| 1038 | ** to it!), and CmdBlkP is the pointer to the command block allocated using |
| 1039 | ** RIOGetCmdBlk(). |
| 1040 | ** |
| 1041 | */ |