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