Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/agpgart
[linux-2.6] / drivers / char / rio / riocmd.c
1 /*
2 ** -----------------------------------------------------------------------------
3 **
4 **  Perle Specialix driver for Linux
5 **  ported from the existing SCO driver source
6 **
7  *
8  *  (C) 1990 - 2000 Specialix International Ltd., Byfleet, Surrey, UK.
9  *
10  *      This program is free software; you can redistribute it and/or modify
11  *      it under the terms of the GNU General Public License as published by
12  *      the Free Software Foundation; either version 2 of the License, or
13  *      (at your option) any later version.
14  *
15  *      This program is distributed in the hope that it will be useful,
16  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
17  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  *      GNU General Public License for more details.
19  *
20  *      You should have received a copy of the GNU General Public License
21  *      along with this program; if not, write to the Free Software
22  *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 **
24 **      Module          : riocmd.c
25 **      SID             : 1.2
26 **      Last Modified   : 11/6/98 10:33:41
27 **      Retrieved       : 11/6/98 10:33:49
28 **
29 **  ident @(#)riocmd.c  1.2
30 **
31 ** -----------------------------------------------------------------------------
32 */
33 #ifdef SCCS_LABELS
34 static char *_riocmd_c_sccs_ = "@(#)riocmd.c    1.2";
35 #endif
36
37 #include <linux/module.h>
38 #include <linux/slab.h>
39 #include <linux/errno.h>
40 #include <linux/tty.h>
41 #include <asm/io.h>
42 #include <asm/system.h>
43 #include <asm/string.h>
44 #include <asm/semaphore.h>
45
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 RIOFoadRta(struct Host *HostP, struct Map *MapP)
87 {
88         struct CmdBlk *CmdBlkP;
89
90         rio_dprintk(RIO_DEBUG_CMD, "FOAD RTA\n");
91
92         CmdBlkP = RIOGetCmdBlk();
93
94         if (!CmdBlkP) {
95                 rio_dprintk(RIO_DEBUG_CMD, "FOAD RTA: GetCmdBlk failed\n");
96                 return -ENXIO;
97         }
98
99         CmdBlkP->Packet.dest_unit = MapP->ID;
100         CmdBlkP->Packet.dest_port = BOOT_RUP;
101         CmdBlkP->Packet.src_unit = 0;
102         CmdBlkP->Packet.src_port = BOOT_RUP;
103         CmdBlkP->Packet.len = 0x84;
104         CmdBlkP->Packet.data[0] = IFOAD;
105         CmdBlkP->Packet.data[1] = 0;
106         CmdBlkP->Packet.data[2] = IFOAD_MAGIC & 0xFF;
107         CmdBlkP->Packet.data[3] = (IFOAD_MAGIC >> 8) & 0xFF;
108
109         if (RIOQueueCmdBlk(HostP, MapP->ID - 1, CmdBlkP) == RIO_FAIL) {
110                 rio_dprintk(RIO_DEBUG_CMD, "FOAD RTA: Failed to queue foad command\n");
111                 return -EIO;
112         }
113         return 0;
114 }
115
116 int RIOZombieRta(struct Host *HostP, struct Map *MapP)
117 {
118         struct CmdBlk *CmdBlkP;
119
120         rio_dprintk(RIO_DEBUG_CMD, "ZOMBIE RTA\n");
121
122         CmdBlkP = RIOGetCmdBlk();
123
124         if (!CmdBlkP) {
125                 rio_dprintk(RIO_DEBUG_CMD, "ZOMBIE RTA: GetCmdBlk failed\n");
126                 return -ENXIO;
127         }
128
129         CmdBlkP->Packet.dest_unit = MapP->ID;
130         CmdBlkP->Packet.dest_port = BOOT_RUP;
131         CmdBlkP->Packet.src_unit = 0;
132         CmdBlkP->Packet.src_port = BOOT_RUP;
133         CmdBlkP->Packet.len = 0x84;
134         CmdBlkP->Packet.data[0] = ZOMBIE;
135         CmdBlkP->Packet.data[1] = 0;
136         CmdBlkP->Packet.data[2] = ZOMBIE_MAGIC & 0xFF;
137         CmdBlkP->Packet.data[3] = (ZOMBIE_MAGIC >> 8) & 0xFF;
138
139         if (RIOQueueCmdBlk(HostP, MapP->ID - 1, CmdBlkP) == RIO_FAIL) {
140                 rio_dprintk(RIO_DEBUG_CMD, "ZOMBIE RTA: Failed to queue zombie command\n");
141                 return -EIO;
142         }
143         return 0;
144 }
145
146 int RIOCommandRta(struct rio_info *p, uint RtaUnique, int (*func) (struct Host * HostP, struct Map * MapP))
147 {
148         uint Host;
149
150         rio_dprintk(RIO_DEBUG_CMD, "Command RTA 0x%x func 0x%x\n", RtaUnique, (int) func);
151
152         if (!RtaUnique)
153                 return (0);
154
155         for (Host = 0; Host < p->RIONumHosts; Host++) {
156                 uint Rta;
157                 struct Host *HostP = &p->RIOHosts[Host];
158
159                 for (Rta = 0; Rta < RTAS_PER_HOST; Rta++) {
160                         struct Map *MapP = &HostP->Mapping[Rta];
161
162                         if (MapP->RtaUniqueNum == RtaUnique) {
163                                 uint Link;
164
165                                 /*
166                                  ** now, lets just check we have a route to it...
167                                  ** IF the routing stuff is working, then one of the
168                                  ** topology entries for this unit will have a legit
169                                  ** route *somewhere*. We care not where - if its got
170                                  ** any connections, we can get to it.
171                                  */
172                                 for (Link = 0; Link < LINKS_PER_UNIT; Link++) {
173                                         if (MapP->Topology[Link].Unit <= (uchar) MAX_RUP) {
174                                                 /*
175                                                  ** Its worth trying the operation...
176                                                  */
177                                                 return (*func) (HostP, MapP);
178                                         }
179                                 }
180                         }
181                 }
182         }
183         return -ENXIO;
184 }
185
186
187 int RIOIdentifyRta(struct rio_info *p, caddr_t arg)
188 {
189         uint Host;
190
191         if (copyin((int) arg, (caddr_t) & IdRta, sizeof(IdRta)) == COPYFAIL) {
192                 rio_dprintk(RIO_DEBUG_CMD, "RIO_IDENTIFY_RTA copy failed\n");
193                 p->RIOError.Error = COPYIN_FAILED;
194                 return -EFAULT;
195         }
196
197         for (Host = 0; Host < p->RIONumHosts; Host++) {
198                 uint Rta;
199                 struct Host *HostP = &p->RIOHosts[Host];
200
201                 for (Rta = 0; Rta < RTAS_PER_HOST; Rta++) {
202                         struct Map *MapP = &HostP->Mapping[Rta];
203
204                         if (MapP->RtaUniqueNum == IdRta.RtaUnique) {
205                                 uint Link;
206                                 /*
207                                  ** now, lets just check we have a route to it...
208                                  ** IF the routing stuff is working, then one of the
209                                  ** topology entries for this unit will have a legit
210                                  ** route *somewhere*. We care not where - if its got
211                                  ** any connections, we can get to it.
212                                  */
213                                 for (Link = 0; Link < LINKS_PER_UNIT; Link++) {
214                                         if (MapP->Topology[Link].Unit <= (uchar) MAX_RUP) {
215                                                 /*
216                                                  ** Its worth trying the operation...
217                                                  */
218                                                 struct CmdBlk *CmdBlkP;
219
220                                                 rio_dprintk(RIO_DEBUG_CMD, "IDENTIFY RTA\n");
221
222                                                 CmdBlkP = RIOGetCmdBlk();
223
224                                                 if (!CmdBlkP) {
225                                                         rio_dprintk(RIO_DEBUG_CMD, "IDENTIFY RTA: GetCmdBlk failed\n");
226                                                         return -ENXIO;
227                                                 }
228
229                                                 CmdBlkP->Packet.dest_unit = MapP->ID;
230                                                 CmdBlkP->Packet.dest_port = BOOT_RUP;
231                                                 CmdBlkP->Packet.src_unit = 0;
232                                                 CmdBlkP->Packet.src_port = BOOT_RUP;
233                                                 CmdBlkP->Packet.len = 0x84;
234                                                 CmdBlkP->Packet.data[0] = IDENTIFY;
235                                                 CmdBlkP->Packet.data[1] = 0;
236                                                 CmdBlkP->Packet.data[2] = IdRta.ID;
237
238                                                 if (RIOQueueCmdBlk(HostP, MapP->ID - 1, CmdBlkP) == RIO_FAIL) {
239                                                         rio_dprintk(RIO_DEBUG_CMD, "IDENTIFY RTA: Failed to queue command\n");
240                                                         return -EIO;
241                                                 }
242                                                 return 0;
243                                         }
244                                 }
245                         }
246                 }
247         }
248         return -ENOENT;
249 }
250
251
252 int RIOKillNeighbour(struct rio_info *p, caddr_t arg)
253 {
254         uint Host;
255         uint ID;
256         struct Host *HostP;
257         struct CmdBlk *CmdBlkP;
258
259         rio_dprintk(RIO_DEBUG_CMD, "KILL HOST NEIGHBOUR\n");
260
261         if (copyin((int) arg, (caddr_t) & KillUnit, sizeof(KillUnit)) == COPYFAIL) {
262                 rio_dprintk(RIO_DEBUG_CMD, "RIO_KILL_NEIGHBOUR copy failed\n");
263                 p->RIOError.Error = COPYIN_FAILED;
264                 return -EFAULT;
265         }
266
267         if (KillUnit.Link > 3)
268                 return -ENXIO;
269
270         CmdBlkP = RIOGetCmdBlk();
271
272         if (!CmdBlkP) {
273                 rio_dprintk(RIO_DEBUG_CMD, "UFOAD: GetCmdBlk failed\n");
274                 return -ENXIO;
275         }
276
277         CmdBlkP->Packet.dest_unit = 0;
278         CmdBlkP->Packet.src_unit = 0;
279         CmdBlkP->Packet.dest_port = BOOT_RUP;
280         CmdBlkP->Packet.src_port = BOOT_RUP;
281         CmdBlkP->Packet.len = 0x84;
282         CmdBlkP->Packet.data[0] = UFOAD;
283         CmdBlkP->Packet.data[1] = KillUnit.Link;
284         CmdBlkP->Packet.data[2] = UFOAD_MAGIC & 0xFF;
285         CmdBlkP->Packet.data[3] = (UFOAD_MAGIC >> 8) & 0xFF;
286
287         for (Host = 0; Host < p->RIONumHosts; Host++) {
288                 ID = 0;
289                 HostP = &p->RIOHosts[Host];
290
291                 if (HostP->UniqueNum == KillUnit.UniqueNum) {
292                         if (RIOQueueCmdBlk(HostP, RTAS_PER_HOST + KillUnit.Link, CmdBlkP) == RIO_FAIL) {
293                                 rio_dprintk(RIO_DEBUG_CMD, "UFOAD: Failed queue command\n");
294                                 return -EIO;
295                         }
296                         return 0;
297                 }
298
299                 for (ID = 0; ID < RTAS_PER_HOST; ID++) {
300                         if (HostP->Mapping[ID].RtaUniqueNum == KillUnit.UniqueNum) {
301                                 CmdBlkP->Packet.dest_unit = ID + 1;
302                                 if (RIOQueueCmdBlk(HostP, ID, CmdBlkP) == RIO_FAIL) {
303                                         rio_dprintk(RIO_DEBUG_CMD, "UFOAD: Failed queue command\n");
304                                         return -EIO;
305                                 }
306                                 return 0;
307                         }
308                 }
309         }
310         RIOFreeCmdBlk(CmdBlkP);
311         return -ENXIO;
312 }
313
314 int RIOSuspendBootRta(struct Host *HostP, int ID, int Link)
315 {
316         struct CmdBlk *CmdBlkP;
317
318         rio_dprintk(RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA ID %d, link %c\n", ID, 'A' + Link);
319
320         CmdBlkP = RIOGetCmdBlk();
321
322         if (!CmdBlkP) {
323                 rio_dprintk(RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: GetCmdBlk failed\n");
324                 return -ENXIO;
325         }
326
327         CmdBlkP->Packet.dest_unit = ID;
328         CmdBlkP->Packet.dest_port = BOOT_RUP;
329         CmdBlkP->Packet.src_unit = 0;
330         CmdBlkP->Packet.src_port = BOOT_RUP;
331         CmdBlkP->Packet.len = 0x84;
332         CmdBlkP->Packet.data[0] = IWAIT;
333         CmdBlkP->Packet.data[1] = Link;
334         CmdBlkP->Packet.data[2] = IWAIT_MAGIC & 0xFF;
335         CmdBlkP->Packet.data[3] = (IWAIT_MAGIC >> 8) & 0xFF;
336
337         if (RIOQueueCmdBlk(HostP, ID - 1, CmdBlkP) == RIO_FAIL) {
338                 rio_dprintk(RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: Failed to queue iwait command\n");
339                 return -EIO;
340         }
341         return 0;
342 }
343
344 int RIOFoadWakeup(struct rio_info *p)
345 {
346         int port;
347         register struct Port *PortP;
348         unsigned long flags;
349
350         for (port = 0; port < RIO_PORTS; port++) {
351                 PortP = p->RIOPortp[port];
352
353                 rio_spin_lock_irqsave(&PortP->portSem, flags);
354                 PortP->Config = 0;
355                 PortP->State = 0;
356                 PortP->InUse = NOT_INUSE;
357                 PortP->PortState = 0;
358                 PortP->FlushCmdBodge = 0;
359                 PortP->ModemLines = 0;
360                 PortP->ModemState = 0;
361                 PortP->CookMode = 0;
362                 PortP->ParamSem = 0;
363                 PortP->Mapped = 0;
364                 PortP->WflushFlag = 0;
365                 PortP->MagicFlags = 0;
366                 PortP->RxDataStart = 0;
367                 PortP->TxBufferIn = 0;
368                 PortP->TxBufferOut = 0;
369                 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
370         }
371         return (0);
372 }
373
374 /*
375 ** Incoming command on the COMMAND_RUP to be processed.
376 */
377 static int RIOCommandRup(struct rio_info *p, uint Rup, struct Host *HostP, PKT * PacketP)
378 {
379         struct PktCmd *PktCmdP = (struct PktCmd *) PacketP->data;
380         struct Port *PortP;
381         struct UnixRup *UnixRupP;
382         ushort SysPort;
383         ushort ReportedModemStatus;
384         ushort rup;
385         ushort subCommand;
386         unsigned long flags;
387
388         func_enter();
389
390         /*
391          ** 16 port RTA note:
392          ** Command rup packets coming from the RTA will have pkt->data[1] (which
393          ** translates to PktCmdP->PhbNum) set to the host port number for the
394          ** particular unit. To access the correct BaseSysPort for a 16 port RTA,
395          ** we can use PhbNum to get the rup number for the appropriate 8 port
396          ** block (for the first block, this should be equal to 'Rup').
397          */
398         rup = RBYTE(PktCmdP->PhbNum) / (ushort) PORTS_PER_RTA;
399         UnixRupP = &HostP->UnixRups[rup];
400         SysPort = UnixRupP->BaseSysPort + (RBYTE(PktCmdP->PhbNum) % (ushort) PORTS_PER_RTA);
401         rio_dprintk(RIO_DEBUG_CMD, "Command on rup %d, port %d\n", rup, SysPort);
402
403         if (UnixRupP->BaseSysPort == NO_PORT) {
404                 rio_dprintk(RIO_DEBUG_CMD, "OBSCURE ERROR!\n");
405                 rio_dprintk(RIO_DEBUG_CMD, "Diagnostics follow. Please WRITE THESE DOWN and report them to Specialix Technical Support\n");
406                 rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: Host number %d, name ``%s''\n", HostP - p->RIOHosts, HostP->Name);
407                 rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: Rup number  0x%x\n", rup);
408
409                 if (Rup >= (ushort) MAX_RUP) {
410                         rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: This is the RUP for RTA ``%s''\n", HostP->Mapping[Rup].Name);
411                 } else
412                         rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: This is the RUP for link ``%c'' of host ``%s''\n", ('A' + Rup - MAX_RUP), HostP->Name);
413
414                 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Destination 0x%x:0x%x\n", PacketP->dest_unit, PacketP->dest_port);
415                 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Source    0x%x:0x%x\n", PacketP->src_unit, PacketP->src_port);
416                 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Length    0x%x (%d)\n", PacketP->len, PacketP->len);
417                 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Control  0x%x (%d)\n", PacketP->control, PacketP->control);
418                 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Check      0x%x (%d)\n", PacketP->csum, PacketP->csum);
419                 rio_dprintk(RIO_DEBUG_CMD, "COMMAND information: Host Port Number 0x%x, " "Command Code 0x%x\n", PktCmdP->PhbNum, PktCmdP->Command);
420                 return TRUE;
421         }
422         PortP = p->RIOPortp[SysPort];
423         rio_spin_lock_irqsave(&PortP->portSem, flags);
424         switch (RBYTE(PktCmdP->Command)) {
425         case BREAK_RECEIVED:
426                 rio_dprintk(RIO_DEBUG_CMD, "Received a break!\n");
427                 /* If the current line disc. is not multi-threading and
428                    the current processor is not the default, reset rup_intr
429                    and return FALSE to ensure that the command packet is
430                    not freed. */
431                 /* Call tmgr HANGUP HERE */
432                 /* Fix this later when every thing works !!!! RAMRAJ */
433                 gs_got_break(&PortP->gs);
434                 break;
435
436         case COMPLETE:
437                 rio_dprintk(RIO_DEBUG_CMD, "Command complete on phb %d host %d\n", RBYTE(PktCmdP->PhbNum), HostP - p->RIOHosts);
438                 subCommand = 1;
439                 switch (RBYTE(PktCmdP->SubCommand)) {
440                 case MEMDUMP:
441                         rio_dprintk(RIO_DEBUG_CMD, "Memory dump cmd (0x%x) from addr 0x%x\n", RBYTE(PktCmdP->SubCommand), RWORD(PktCmdP->SubAddr));
442                         break;
443                 case READ_REGISTER:
444                         rio_dprintk(RIO_DEBUG_CMD, "Read register (0x%x)\n", RWORD(PktCmdP->SubAddr));
445                         p->CdRegister = (RBYTE(PktCmdP->ModemStatus) & MSVR1_HOST);
446                         break;
447                 default:
448                         subCommand = 0;
449                         break;
450                 }
451                 if (subCommand)
452                         break;
453                 rio_dprintk(RIO_DEBUG_CMD, "New status is 0x%x was 0x%x\n", RBYTE(PktCmdP->PortStatus), PortP->PortState);
454                 if (PortP->PortState != RBYTE(PktCmdP->PortStatus)) {
455                         rio_dprintk(RIO_DEBUG_CMD, "Mark status & wakeup\n");
456                         PortP->PortState = RBYTE(PktCmdP->PortStatus);
457                         /* What should we do here ...
458                            wakeup( &PortP->PortState );
459                          */
460                 } else
461                         rio_dprintk(RIO_DEBUG_CMD, "No change\n");
462
463                 /* FALLTHROUGH */
464         case MODEM_STATUS:
465                 /*
466                  ** Knock out the tbusy and tstop bits, as these are not relevant
467                  ** to the check for modem status change (they're just there because
468                  ** it's a convenient place to put them!).
469                  */
470                 ReportedModemStatus = RBYTE(PktCmdP->ModemStatus);
471                 if ((PortP->ModemState & MSVR1_HOST) == (ReportedModemStatus & MSVR1_HOST)) {
472                         rio_dprintk(RIO_DEBUG_CMD, "Modem status unchanged 0x%x\n", PortP->ModemState);
473                         /*
474                          ** Update ModemState just in case tbusy or tstop states have
475                          ** changed.
476                          */
477                         PortP->ModemState = ReportedModemStatus;
478                 } else {
479                         rio_dprintk(RIO_DEBUG_CMD, "Modem status change from 0x%x to 0x%x\n", PortP->ModemState, ReportedModemStatus);
480                         PortP->ModemState = ReportedModemStatus;
481 #ifdef MODEM_SUPPORT
482                         if (PortP->Mapped) {
483                                 /***********************************************************\
484                                 *************************************************************
485                                 ***                                                                                                        ***
486                                 ***               M O D E M   S T A T E   C H A N G E             ***
487                                 ***                                                                                                        ***
488                                 *************************************************************
489                                 \***********************************************************/
490                                 /*
491                                  ** If the device is a modem, then check the modem
492                                  ** carrier.
493                                  */
494                                 if (PortP->gs.tty == NULL)
495                                         break;
496                                 if (PortP->gs.tty->termios == NULL)
497                                         break;
498
499                                 if (!(PortP->gs.tty->termios->c_cflag & CLOCAL) && ((PortP->State & (RIO_MOPEN | RIO_WOPEN)))) {
500
501                                         rio_dprintk(RIO_DEBUG_CMD, "Is there a Carrier?\n");
502                                         /*
503                                          ** Is there a carrier?
504                                          */
505                                         if (PortP->ModemState & MSVR1_CD) {
506                                                 /*
507                                                  ** Has carrier just appeared?
508                                                  */
509                                                 if (!(PortP->State & RIO_CARR_ON)) {
510                                                         rio_dprintk(RIO_DEBUG_CMD, "Carrier just came up.\n");
511                                                         PortP->State |= RIO_CARR_ON;
512                                                         /*
513                                                          ** wakeup anyone in WOPEN
514                                                          */
515                                                         if (PortP->State & (PORT_ISOPEN | RIO_WOPEN))
516                                                                 wake_up_interruptible(&PortP->gs.open_wait);
517 #ifdef STATS
518                                                         PortP->Stat.ModemOnCnt++;
519 #endif
520                                                 }
521                                         } else {
522                                                 /*
523                                                  ** Has carrier just dropped?
524                                                  */
525                                                 if (PortP->State & RIO_CARR_ON) {
526                                                         if (PortP->State & (PORT_ISOPEN | RIO_WOPEN | RIO_MOPEN))
527                                                                 tty_hangup(PortP->gs.tty);
528                                                         PortP->State &= ~RIO_CARR_ON;
529                                                         rio_dprintk(RIO_DEBUG_CMD, "Carrirer just went down\n");
530 #ifdef STATS
531                                                         PortP->Stat.ModemOffCnt++;
532 #endif
533                                                 }
534                                         }
535                                 }
536                         }
537 #endif
538                 }
539                 break;
540
541         default:
542                 rio_dprintk(RIO_DEBUG_CMD, "Unknown command %d on CMD_RUP of host %d\n", RBYTE(PktCmdP->Command), HostP - p->RIOHosts);
543                 break;
544         }
545         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
546
547         func_exit();
548
549         return TRUE;
550 }
551
552 /*
553 ** The command mechanism:
554 **      Each rup has a chain of commands associated with it.
555 **      This chain is maintained by routines in this file.
556 **      Periodically we are called and we run a quick check of all the
557 **      active chains to determine if there is a command to be executed,
558 **      and if the rup is ready to accept it.
559 **
560 */
561
562 /*
563 ** Allocate an empty command block.
564 */
565 struct CmdBlk *RIOGetCmdBlk(void)
566 {
567         struct CmdBlk *CmdBlkP;
568
569         CmdBlkP = (struct CmdBlk *) sysbrk(sizeof(struct CmdBlk));
570         if (CmdBlkP)
571                 bzero(CmdBlkP, sizeof(struct CmdBlk));
572
573         return CmdBlkP;
574 }
575
576 /*
577 ** Return a block to the head of the free list.
578 */
579 void RIOFreeCmdBlk(struct CmdBlk *CmdBlkP)
580 {
581         sysfree((void *) CmdBlkP, sizeof(struct CmdBlk));
582 }
583
584 /*
585 ** attach a command block to the list of commands to be performed for
586 ** a given rup.
587 */
588 int RIOQueueCmdBlk(struct Host *HostP, uint Rup, struct CmdBlk *CmdBlkP)
589 {
590         struct CmdBlk **Base;
591         struct UnixRup *UnixRupP;
592         unsigned long flags;
593
594         if (Rup >= (ushort) (MAX_RUP + LINKS_PER_UNIT)) {
595                 rio_dprintk(RIO_DEBUG_CMD, "Illegal rup number %d in RIOQueueCmdBlk\n", Rup);
596                 RIOFreeCmdBlk(CmdBlkP);
597                 return RIO_FAIL;
598         }
599
600         UnixRupP = &HostP->UnixRups[Rup];
601
602         rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
603
604         /*
605          ** If the RUP is currently inactive, then put the request
606          ** straight on the RUP....
607          */
608         if ((UnixRupP->CmdsWaitingP == NULL) && (UnixRupP->CmdPendingP == NULL) && (RWORD(UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE) && (CmdBlkP->PreFuncP ? (*CmdBlkP->PreFuncP) (CmdBlkP->PreArg, CmdBlkP)
609                                                                                                                                              : TRUE)) {
610                 rio_dprintk(RIO_DEBUG_CMD, "RUP inactive-placing command straight on. Cmd byte is 0x%x\n", CmdBlkP->Packet.data[0]);
611
612                 /*
613                  ** Whammy! blat that pack!
614                  */
615                 HostP->Copy((caddr_t) & CmdBlkP->Packet, RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt), sizeof(PKT));
616
617                 /*
618                  ** place command packet on the pending position.
619                  */
620                 UnixRupP->CmdPendingP = CmdBlkP;
621
622                 /*
623                  ** set the command register
624                  */
625                 WWORD(UnixRupP->RupP->txcontrol, TX_PACKET_READY);
626
627                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
628
629                 return RIO_SUCCESS;
630         }
631         rio_dprintk(RIO_DEBUG_CMD, "RUP active - en-queing\n");
632
633         if (UnixRupP->CmdsWaitingP != NULL)
634                 rio_dprintk(RIO_DEBUG_CMD, "Rup active - command waiting\n");
635         if (UnixRupP->CmdPendingP != NULL)
636                 rio_dprintk(RIO_DEBUG_CMD, "Rup active - command pending\n");
637         if (RWORD(UnixRupP->RupP->txcontrol) != TX_RUP_INACTIVE)
638                 rio_dprintk(RIO_DEBUG_CMD, "Rup active - command rup not ready\n");
639
640         Base = &UnixRupP->CmdsWaitingP;
641
642         rio_dprintk(RIO_DEBUG_CMD, "First try to queue cmdblk 0x%x at 0x%x\n", (int) CmdBlkP, (int) Base);
643
644         while (*Base) {
645                 rio_dprintk(RIO_DEBUG_CMD, "Command cmdblk 0x%x here\n", (int) (*Base));
646                 Base = &((*Base)->NextP);
647                 rio_dprintk(RIO_DEBUG_CMD, "Now try to queue cmd cmdblk 0x%x at 0x%x\n", (int) CmdBlkP, (int) Base);
648         }
649
650         rio_dprintk(RIO_DEBUG_CMD, "Will queue cmdblk 0x%x at 0x%x\n", (int) CmdBlkP, (int) Base);
651
652         *Base = CmdBlkP;
653
654         CmdBlkP->NextP = NULL;
655
656         rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
657
658         return RIO_SUCCESS;
659 }
660
661 /*
662 ** Here we go - if there is an empty rup, fill it!
663 ** must be called at splrio() or higher.
664 */
665 void RIOPollHostCommands(struct rio_info *p, struct Host *HostP)
666 {
667         register struct CmdBlk *CmdBlkP;
668         register struct UnixRup *UnixRupP;
669         struct PKT *PacketP;
670         ushort Rup;
671         unsigned long flags;
672
673
674         Rup = MAX_RUP + LINKS_PER_UNIT;
675
676         do {                    /* do this loop for each RUP */
677                 /*
678                  ** locate the rup we are processing & lock it
679                  */
680                 UnixRupP = &HostP->UnixRups[--Rup];
681
682                 spin_lock_irqsave(&UnixRupP->RupLock, flags);
683
684                 /*
685                  ** First check for incoming commands:
686                  */
687                 if (RWORD(UnixRupP->RupP->rxcontrol) != RX_RUP_INACTIVE) {
688                         int FreeMe;
689
690                         PacketP = (PKT *) RIO_PTR(HostP->Caddr, RWORD(UnixRupP->RupP->rxpkt));
691
692                         ShowPacket(DBG_CMD, PacketP);
693
694                         switch (RBYTE(PacketP->dest_port)) {
695                         case BOOT_RUP:
696                                 rio_dprintk(RIO_DEBUG_CMD, "Incoming Boot %s packet '%x'\n", RBYTE(PacketP->len) & 0x80 ? "Command" : "Data", RBYTE(PacketP->data[0]));
697                                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
698                                 FreeMe = RIOBootRup(p, Rup, HostP, PacketP);
699                                 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
700                                 break;
701
702                         case COMMAND_RUP:
703                                 /*
704                                  ** Free the RUP lock as loss of carrier causes a
705                                  ** ttyflush which will (eventually) call another
706                                  ** routine that uses the RUP lock.
707                                  */
708                                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
709                                 FreeMe = RIOCommandRup(p, Rup, HostP, PacketP);
710                                 if (PacketP->data[5] == MEMDUMP) {
711                                         rio_dprintk(RIO_DEBUG_CMD, "Memdump from 0x%x complete\n", *(ushort *) & (PacketP->data[6]));
712                                         HostP->Copy((caddr_t) & (PacketP->data[8]), (caddr_t) p->RIOMemDump, 32);
713                                 }
714                                 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
715                                 break;
716
717                         case ROUTE_RUP:
718                                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
719                                 FreeMe = RIORouteRup(p, Rup, HostP, PacketP);
720                                 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
721                                 break;
722
723                         default:
724                                 rio_dprintk(RIO_DEBUG_CMD, "Unknown RUP %d\n", RBYTE(PacketP->dest_port));
725                                 FreeMe = 1;
726                                 break;
727                         }
728
729                         if (FreeMe) {
730                                 rio_dprintk(RIO_DEBUG_CMD, "Free processed incoming command packet\n");
731                                 put_free_end(HostP, PacketP);
732
733                                 WWORD(UnixRupP->RupP->rxcontrol, RX_RUP_INACTIVE);
734
735                                 if (RWORD(UnixRupP->RupP->handshake) == PHB_HANDSHAKE_SET) {
736                                         rio_dprintk(RIO_DEBUG_CMD, "Handshake rup %d\n", Rup);
737                                         WWORD(UnixRupP->RupP->handshake, PHB_HANDSHAKE_SET | PHB_HANDSHAKE_RESET);
738                                 }
739                         }
740                 }
741
742                 /*
743                  ** IF a command was running on the port,
744                  ** and it has completed, then tidy it up.
745                  */
746                 if ((CmdBlkP = UnixRupP->CmdPendingP) &&        /* ASSIGN! */
747                     (RWORD(UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) {
748                         /*
749                          ** we are idle.
750                          ** there is a command in pending.
751                          ** Therefore, this command has finished.
752                          ** So, wakeup whoever is waiting for it (and tell them
753                          ** what happened).
754                          */
755                         if (CmdBlkP->Packet.dest_port == BOOT_RUP)
756                                 rio_dprintk(RIO_DEBUG_CMD, "Free Boot %s Command Block '%x'\n", CmdBlkP->Packet.len & 0x80 ? "Command" : "Data", CmdBlkP->Packet.data[0]);
757
758                         rio_dprintk(RIO_DEBUG_CMD, "Command 0x%x completed\n", (int) CmdBlkP);
759
760                         /*
761                          ** Clear the Rup lock to prevent mutual exclusion.
762                          */
763                         if (CmdBlkP->PostFuncP) {
764                                 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
765                                 (*CmdBlkP->PostFuncP) (CmdBlkP->PostArg, CmdBlkP);
766                                 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
767                         }
768
769                         /*
770                          ** ....clear the pending flag....
771                          */
772                         UnixRupP->CmdPendingP = NULL;
773
774                         /*
775                          ** ....and return the command block to the freelist.
776                          */
777                         RIOFreeCmdBlk(CmdBlkP);
778                 }
779
780                 /*
781                  ** If there is a command for this rup, and the rup
782                  ** is idle, then process the command
783                  */
784                 if ((CmdBlkP = UnixRupP->CmdsWaitingP) &&       /* ASSIGN! */
785                     (UnixRupP->CmdPendingP == NULL) && (RWORD(UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) {
786                         /*
787                          ** if the pre-function is non-zero, call it.
788                          ** If it returns RIO_FAIL then don't
789                          ** send this command yet!
790                          */
791                         if (!(CmdBlkP->PreFuncP ? (*CmdBlkP->PreFuncP) (CmdBlkP->PreArg, CmdBlkP) : TRUE)) {
792                                 rio_dprintk(RIO_DEBUG_CMD, "Not ready to start command 0x%x\n", (int) CmdBlkP);
793                         } else {
794                                 rio_dprintk(RIO_DEBUG_CMD, "Start new command 0x%x Cmd byte is 0x%x\n", (int) CmdBlkP, CmdBlkP->Packet.data[0]);
795                                 /*
796                                  ** Whammy! blat that pack!
797                                  */
798                                 HostP->Copy((caddr_t) & CmdBlkP->Packet, RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt), sizeof(PKT));
799
800                                 /*
801                                  ** remove the command from the rup command queue...
802                                  */
803                                 UnixRupP->CmdsWaitingP = CmdBlkP->NextP;
804
805                                 /*
806                                  ** ...and place it on the pending position.
807                                  */
808                                 UnixRupP->CmdPendingP = CmdBlkP;
809
810                                 /*
811                                  ** set the command register
812                                  */
813                                 WWORD(UnixRupP->RupP->txcontrol, TX_PACKET_READY);
814
815                                 /*
816                                  ** the command block will be freed
817                                  ** when the command has been processed.
818                                  */
819                         }
820                 }
821                 spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
822         } while (Rup);
823 }
824
825 int RIOWFlushMark(int iPortP, struct CmdBlk *CmdBlkP)
826 {
827         struct Port *PortP = (struct Port *) iPortP;
828         unsigned long flags;
829
830         rio_spin_lock_irqsave(&PortP->portSem, flags);
831         PortP->WflushFlag++;
832         PortP->MagicFlags |= MAGIC_FLUSH;
833         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
834         return RIOUnUse(iPortP, CmdBlkP);
835 }
836
837 int RIORFlushEnable(int iPortP, struct CmdBlk *CmdBlkP)
838 {
839         struct Port *PortP = (struct Port *) iPortP;
840         PKT *PacketP;
841         unsigned long flags;
842
843         rio_spin_lock_irqsave(&PortP->portSem, flags);
844
845         while (can_remove_receive(&PacketP, PortP)) {
846                 remove_receive(PortP);
847                 ShowPacket(DBG_PROC, PacketP);
848                 put_free_end(PortP->HostP, PacketP);
849         }
850
851         if (RWORD(PortP->PhbP->handshake) == PHB_HANDSHAKE_SET) {
852                 /*
853                  ** MAGIC! (Basically, handshake the RX buffer, so that
854                  ** the RTAs upstream can be re-enabled.)
855                  */
856                 rio_dprintk(RIO_DEBUG_CMD, "Util: Set RX handshake bit\n");
857                 WWORD(PortP->PhbP->handshake, PHB_HANDSHAKE_SET | PHB_HANDSHAKE_RESET);
858         }
859         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
860         return RIOUnUse(iPortP, CmdBlkP);
861 }
862
863 int RIOUnUse(int iPortP, struct CmdBlk *CmdBlkP)
864 {
865         struct Port *PortP = (struct Port *) iPortP;
866         unsigned long flags;
867
868         rio_spin_lock_irqsave(&PortP->portSem, flags);
869
870         rio_dprintk(RIO_DEBUG_CMD, "Decrement in use count for port\n");
871
872         if (PortP->InUse) {
873                 if (--PortP->InUse != NOT_INUSE) {
874                         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
875                         return 0;
876                 }
877         }
878         /*
879          ** While PortP->InUse is set (i.e. a preemptive command has been sent to
880          ** the RTA and is awaiting completion), any transmit data is prevented from
881          ** being transferred from the write queue into the transmit packets
882          ** (add_transmit) and no furthur transmit interrupt will be sent for that
883          ** data. The next interrupt will occur up to 500ms later (RIOIntr is called
884          ** twice a second as a saftey measure). This was the case when kermit was
885          ** used to send data into a RIO port. After each packet was sent, TCFLSH
886          ** was called to flush the read queue preemptively. PortP->InUse was
887          ** incremented, thereby blocking the 6 byte acknowledgement packet
888          ** transmitted back. This acknowledgment hung around for 500ms before
889          ** being sent, thus reducing input performance substantially!.
890          ** When PortP->InUse becomes NOT_INUSE, we must ensure that any data
891          ** hanging around in the transmit buffer is sent immediately.
892          */
893         WWORD(PortP->HostP->ParmMapP->tx_intr, 1);
894         /* What to do here ..
895            wakeup( (caddr_t)&(PortP->InUse) );
896          */
897         rio_spin_unlock_irqrestore(&PortP->portSem, flags);
898         return 0;
899 }
900
901 void ShowPacket(uint Flags, struct PKT *PacketP)
902 {
903 }
904
905 /*
906 ** 
907 ** How to use this file:
908 ** 
909 ** To send a command down a rup, you need to allocate a command block, fill
910 ** in the packet information, fill in the command number, fill in the pre-
911 ** and post- functions and arguments, and then add the command block to the
912 ** queue of command blocks for the port in question. When the port is idle,
913 ** then the pre-function will be called. If this returns RIO_FAIL then the
914 ** command will be re-queued and tried again at a later date (probably in one
915 ** clock tick). If the pre-function returns NOT RIO_FAIL, then the command
916 ** packet will be queued on the RUP, and the txcontrol field set to the
917 ** command number. When the txcontrol field has changed from being the
918 ** command number, then the post-function will be called, with the argument
919 ** specified earlier, a pointer to the command block, and the value of
920 ** txcontrol.
921 ** 
922 ** To allocate a command block, call RIOGetCmdBlk(). This returns a pointer
923 ** to the command block structure allocated, or NULL if there aren't any.
924 ** The block will have been zeroed for you.
925 ** 
926 ** The structure has the following fields:
927 ** 
928 ** struct CmdBlk
929 ** {
930 **       struct CmdBlk *NextP;            ** Pointer to next command block   **
931 **       struct PKT      Packet;                ** A packet, to copy to the rup **
932 **                      int      (*PreFuncP)();  ** The func to call to check if OK **
933 **                      int      PreArg;                ** The arg for the func                 **
934 **                      int      (*PostFuncP)(); ** The func to call when completed **
935 **                      int      PostArg;          ** The arg for the func                      **
936 ** };
937 ** 
938 ** You need to fill in ALL fields EXCEPT NextP, which is used to link the
939 ** blocks together either on the free list or on the Rup list.
940 ** 
941 ** Packet is an actual packet structure to be filled in with the packet
942 ** information associated with the command. You need to fill in everything,
943 ** as the command processore doesn't process the command packet in any way.
944 ** 
945 ** The PreFuncP is called before the packet is enqueued on the host rup.
946 ** PreFuncP is called as (*PreFuncP)(PreArg, CmdBlkP);. PreFuncP must
947 ** return !RIO_FAIL to have the packet queued on the rup, and RIO_FAIL
948 ** if the packet is NOT to be queued.
949 ** 
950 ** The PostFuncP is called when the command has completed. It is called
951 ** as (*PostFuncP)(PostArg, CmdBlkP, txcontrol);. PostFuncP is not expected
952 ** to return a value. PostFuncP does NOT need to free the command block,
953 ** as this happens automatically after PostFuncP returns.
954 ** 
955 ** Once the command block has been filled in, it is attached to the correct
956 ** queue by calling RIOQueueCmdBlk( HostP, Rup, CmdBlkP ) where HostP is
957 ** a pointer to the struct Host, Rup is the NUMBER of the rup (NOT a pointer
958 ** to it!), and CmdBlkP is the pointer to the command block allocated using
959 ** RIOGetCmdBlk().
960 ** 
961 */