ia64/linux-2.6.18-xen.hg

view drivers/char/rio/riocmd.c @ 893:f994bfe9b93b

linux/blktap2: reduce TLB flush scope

c/s 885 added very coarse TLB flushing. Since these flushes always
follow single page updates, single page flushes (when available) are
sufficient.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Jun 04 10:32:57 2009 +0100 (2009-06-04)
parents 831230e53067
children
line source
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
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 #include <asm/uaccess.h>
47 #include <linux/termios.h>
48 #include <linux/serial.h>
50 #include <linux/generic_serial.h>
52 #include "linux_compat.h"
53 #include "rio_linux.h"
54 #include "pkt.h"
55 #include "daemon.h"
56 #include "rio.h"
57 #include "riospace.h"
58 #include "cmdpkt.h"
59 #include "map.h"
60 #include "rup.h"
61 #include "port.h"
62 #include "riodrvr.h"
63 #include "rioinfo.h"
64 #include "func.h"
65 #include "errors.h"
66 #include "pci.h"
68 #include "parmmap.h"
69 #include "unixrup.h"
70 #include "board.h"
71 #include "host.h"
72 #include "phb.h"
73 #include "link.h"
74 #include "cmdblk.h"
75 #include "route.h"
76 #include "cirrus.h"
79 static struct IdentifyRta IdRta;
80 static struct KillNeighbour KillUnit;
82 int RIOFoadRta(struct Host *HostP, struct Map *MapP)
83 {
84 struct CmdBlk *CmdBlkP;
86 rio_dprintk(RIO_DEBUG_CMD, "FOAD RTA\n");
88 CmdBlkP = RIOGetCmdBlk();
90 if (!CmdBlkP) {
91 rio_dprintk(RIO_DEBUG_CMD, "FOAD RTA: GetCmdBlk failed\n");
92 return -ENXIO;
93 }
95 CmdBlkP->Packet.dest_unit = MapP->ID;
96 CmdBlkP->Packet.dest_port = BOOT_RUP;
97 CmdBlkP->Packet.src_unit = 0;
98 CmdBlkP->Packet.src_port = BOOT_RUP;
99 CmdBlkP->Packet.len = 0x84;
100 CmdBlkP->Packet.data[0] = IFOAD;
101 CmdBlkP->Packet.data[1] = 0;
102 CmdBlkP->Packet.data[2] = IFOAD_MAGIC & 0xFF;
103 CmdBlkP->Packet.data[3] = (IFOAD_MAGIC >> 8) & 0xFF;
105 if (RIOQueueCmdBlk(HostP, MapP->ID - 1, CmdBlkP) == RIO_FAIL) {
106 rio_dprintk(RIO_DEBUG_CMD, "FOAD RTA: Failed to queue foad command\n");
107 return -EIO;
108 }
109 return 0;
110 }
112 int RIOZombieRta(struct Host *HostP, struct Map *MapP)
113 {
114 struct CmdBlk *CmdBlkP;
116 rio_dprintk(RIO_DEBUG_CMD, "ZOMBIE RTA\n");
118 CmdBlkP = RIOGetCmdBlk();
120 if (!CmdBlkP) {
121 rio_dprintk(RIO_DEBUG_CMD, "ZOMBIE RTA: GetCmdBlk failed\n");
122 return -ENXIO;
123 }
125 CmdBlkP->Packet.dest_unit = MapP->ID;
126 CmdBlkP->Packet.dest_port = BOOT_RUP;
127 CmdBlkP->Packet.src_unit = 0;
128 CmdBlkP->Packet.src_port = BOOT_RUP;
129 CmdBlkP->Packet.len = 0x84;
130 CmdBlkP->Packet.data[0] = ZOMBIE;
131 CmdBlkP->Packet.data[1] = 0;
132 CmdBlkP->Packet.data[2] = ZOMBIE_MAGIC & 0xFF;
133 CmdBlkP->Packet.data[3] = (ZOMBIE_MAGIC >> 8) & 0xFF;
135 if (RIOQueueCmdBlk(HostP, MapP->ID - 1, CmdBlkP) == RIO_FAIL) {
136 rio_dprintk(RIO_DEBUG_CMD, "ZOMBIE RTA: Failed to queue zombie command\n");
137 return -EIO;
138 }
139 return 0;
140 }
142 int RIOCommandRta(struct rio_info *p, unsigned long RtaUnique, int (*func) (struct Host * HostP, struct Map * MapP))
143 {
144 unsigned int Host;
146 rio_dprintk(RIO_DEBUG_CMD, "Command RTA 0x%lx func %p\n", RtaUnique, func);
148 if (!RtaUnique)
149 return (0);
151 for (Host = 0; Host < p->RIONumHosts; Host++) {
152 unsigned int Rta;
153 struct Host *HostP = &p->RIOHosts[Host];
155 for (Rta = 0; Rta < RTAS_PER_HOST; Rta++) {
156 struct Map *MapP = &HostP->Mapping[Rta];
158 if (MapP->RtaUniqueNum == RtaUnique) {
159 uint Link;
161 /*
162 ** now, lets just check we have a route to it...
163 ** IF the routing stuff is working, then one of the
164 ** topology entries for this unit will have a legit
165 ** route *somewhere*. We care not where - if its got
166 ** any connections, we can get to it.
167 */
168 for (Link = 0; Link < LINKS_PER_UNIT; Link++) {
169 if (MapP->Topology[Link].Unit <= (u8) MAX_RUP) {
170 /*
171 ** Its worth trying the operation...
172 */
173 return (*func) (HostP, MapP);
174 }
175 }
176 }
177 }
178 }
179 return -ENXIO;
180 }
183 int RIOIdentifyRta(struct rio_info *p, void __user * arg)
184 {
185 unsigned int Host;
187 if (copy_from_user(&IdRta, arg, sizeof(IdRta))) {
188 rio_dprintk(RIO_DEBUG_CMD, "RIO_IDENTIFY_RTA copy failed\n");
189 p->RIOError.Error = COPYIN_FAILED;
190 return -EFAULT;
191 }
193 for (Host = 0; Host < p->RIONumHosts; Host++) {
194 unsigned int Rta;
195 struct Host *HostP = &p->RIOHosts[Host];
197 for (Rta = 0; Rta < RTAS_PER_HOST; Rta++) {
198 struct Map *MapP = &HostP->Mapping[Rta];
200 if (MapP->RtaUniqueNum == IdRta.RtaUnique) {
201 uint Link;
202 /*
203 ** now, lets just check we have a route to it...
204 ** IF the routing stuff is working, then one of the
205 ** topology entries for this unit will have a legit
206 ** route *somewhere*. We care not where - if its got
207 ** any connections, we can get to it.
208 */
209 for (Link = 0; Link < LINKS_PER_UNIT; Link++) {
210 if (MapP->Topology[Link].Unit <= (u8) MAX_RUP) {
211 /*
212 ** Its worth trying the operation...
213 */
214 struct CmdBlk *CmdBlkP;
216 rio_dprintk(RIO_DEBUG_CMD, "IDENTIFY RTA\n");
218 CmdBlkP = RIOGetCmdBlk();
220 if (!CmdBlkP) {
221 rio_dprintk(RIO_DEBUG_CMD, "IDENTIFY RTA: GetCmdBlk failed\n");
222 return -ENXIO;
223 }
225 CmdBlkP->Packet.dest_unit = MapP->ID;
226 CmdBlkP->Packet.dest_port = BOOT_RUP;
227 CmdBlkP->Packet.src_unit = 0;
228 CmdBlkP->Packet.src_port = BOOT_RUP;
229 CmdBlkP->Packet.len = 0x84;
230 CmdBlkP->Packet.data[0] = IDENTIFY;
231 CmdBlkP->Packet.data[1] = 0;
232 CmdBlkP->Packet.data[2] = IdRta.ID;
234 if (RIOQueueCmdBlk(HostP, MapP->ID - 1, CmdBlkP) == RIO_FAIL) {
235 rio_dprintk(RIO_DEBUG_CMD, "IDENTIFY RTA: Failed to queue command\n");
236 return -EIO;
237 }
238 return 0;
239 }
240 }
241 }
242 }
243 }
244 return -ENOENT;
245 }
248 int RIOKillNeighbour(struct rio_info *p, void __user * arg)
249 {
250 uint Host;
251 uint ID;
252 struct Host *HostP;
253 struct CmdBlk *CmdBlkP;
255 rio_dprintk(RIO_DEBUG_CMD, "KILL HOST NEIGHBOUR\n");
257 if (copy_from_user(&KillUnit, arg, sizeof(KillUnit))) {
258 rio_dprintk(RIO_DEBUG_CMD, "RIO_KILL_NEIGHBOUR copy failed\n");
259 p->RIOError.Error = COPYIN_FAILED;
260 return -EFAULT;
261 }
263 if (KillUnit.Link > 3)
264 return -ENXIO;
266 CmdBlkP = RIOGetCmdBlk();
268 if (!CmdBlkP) {
269 rio_dprintk(RIO_DEBUG_CMD, "UFOAD: GetCmdBlk failed\n");
270 return -ENXIO;
271 }
273 CmdBlkP->Packet.dest_unit = 0;
274 CmdBlkP->Packet.src_unit = 0;
275 CmdBlkP->Packet.dest_port = BOOT_RUP;
276 CmdBlkP->Packet.src_port = BOOT_RUP;
277 CmdBlkP->Packet.len = 0x84;
278 CmdBlkP->Packet.data[0] = UFOAD;
279 CmdBlkP->Packet.data[1] = KillUnit.Link;
280 CmdBlkP->Packet.data[2] = UFOAD_MAGIC & 0xFF;
281 CmdBlkP->Packet.data[3] = (UFOAD_MAGIC >> 8) & 0xFF;
283 for (Host = 0; Host < p->RIONumHosts; Host++) {
284 ID = 0;
285 HostP = &p->RIOHosts[Host];
287 if (HostP->UniqueNum == KillUnit.UniqueNum) {
288 if (RIOQueueCmdBlk(HostP, RTAS_PER_HOST + KillUnit.Link, CmdBlkP) == RIO_FAIL) {
289 rio_dprintk(RIO_DEBUG_CMD, "UFOAD: Failed queue command\n");
290 return -EIO;
291 }
292 return 0;
293 }
295 for (ID = 0; ID < RTAS_PER_HOST; ID++) {
296 if (HostP->Mapping[ID].RtaUniqueNum == KillUnit.UniqueNum) {
297 CmdBlkP->Packet.dest_unit = ID + 1;
298 if (RIOQueueCmdBlk(HostP, ID, CmdBlkP) == RIO_FAIL) {
299 rio_dprintk(RIO_DEBUG_CMD, "UFOAD: Failed queue command\n");
300 return -EIO;
301 }
302 return 0;
303 }
304 }
305 }
306 RIOFreeCmdBlk(CmdBlkP);
307 return -ENXIO;
308 }
310 int RIOSuspendBootRta(struct Host *HostP, int ID, int Link)
311 {
312 struct CmdBlk *CmdBlkP;
314 rio_dprintk(RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA ID %d, link %c\n", ID, 'A' + Link);
316 CmdBlkP = RIOGetCmdBlk();
318 if (!CmdBlkP) {
319 rio_dprintk(RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: GetCmdBlk failed\n");
320 return -ENXIO;
321 }
323 CmdBlkP->Packet.dest_unit = ID;
324 CmdBlkP->Packet.dest_port = BOOT_RUP;
325 CmdBlkP->Packet.src_unit = 0;
326 CmdBlkP->Packet.src_port = BOOT_RUP;
327 CmdBlkP->Packet.len = 0x84;
328 CmdBlkP->Packet.data[0] = IWAIT;
329 CmdBlkP->Packet.data[1] = Link;
330 CmdBlkP->Packet.data[2] = IWAIT_MAGIC & 0xFF;
331 CmdBlkP->Packet.data[3] = (IWAIT_MAGIC >> 8) & 0xFF;
333 if (RIOQueueCmdBlk(HostP, ID - 1, CmdBlkP) == RIO_FAIL) {
334 rio_dprintk(RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: Failed to queue iwait command\n");
335 return -EIO;
336 }
337 return 0;
338 }
340 int RIOFoadWakeup(struct rio_info *p)
341 {
342 int port;
343 struct Port *PortP;
344 unsigned long flags;
346 for (port = 0; port < RIO_PORTS; port++) {
347 PortP = p->RIOPortp[port];
349 rio_spin_lock_irqsave(&PortP->portSem, flags);
350 PortP->Config = 0;
351 PortP->State = 0;
352 PortP->InUse = NOT_INUSE;
353 PortP->PortState = 0;
354 PortP->FlushCmdBodge = 0;
355 PortP->ModemLines = 0;
356 PortP->ModemState = 0;
357 PortP->CookMode = 0;
358 PortP->ParamSem = 0;
359 PortP->Mapped = 0;
360 PortP->WflushFlag = 0;
361 PortP->MagicFlags = 0;
362 PortP->RxDataStart = 0;
363 PortP->TxBufferIn = 0;
364 PortP->TxBufferOut = 0;
365 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
366 }
367 return (0);
368 }
370 /*
371 ** Incoming command on the COMMAND_RUP to be processed.
372 */
373 static int RIOCommandRup(struct rio_info *p, uint Rup, struct Host *HostP, struct PKT __iomem *PacketP)
374 {
375 struct PktCmd __iomem *PktCmdP = (struct PktCmd __iomem *)PacketP->data;
376 struct Port *PortP;
377 struct UnixRup *UnixRupP;
378 unsigned short SysPort;
379 unsigned short ReportedModemStatus;
380 unsigned short rup;
381 unsigned short subCommand;
382 unsigned long flags;
384 func_enter();
386 /*
387 ** 16 port RTA note:
388 ** Command rup packets coming from the RTA will have pkt->data[1] (which
389 ** translates to PktCmdP->PhbNum) set to the host port number for the
390 ** particular unit. To access the correct BaseSysPort for a 16 port RTA,
391 ** we can use PhbNum to get the rup number for the appropriate 8 port
392 ** block (for the first block, this should be equal to 'Rup').
393 */
394 rup = readb(&PktCmdP->PhbNum) / (unsigned short) PORTS_PER_RTA;
395 UnixRupP = &HostP->UnixRups[rup];
396 SysPort = UnixRupP->BaseSysPort + (readb(&PktCmdP->PhbNum) % (unsigned short) PORTS_PER_RTA);
397 rio_dprintk(RIO_DEBUG_CMD, "Command on rup %d, port %d\n", rup, SysPort);
399 if (UnixRupP->BaseSysPort == NO_PORT) {
400 rio_dprintk(RIO_DEBUG_CMD, "OBSCURE ERROR!\n");
401 rio_dprintk(RIO_DEBUG_CMD, "Diagnostics follow. Please WRITE THESE DOWN and report them to Specialix Technical Support\n");
402 rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: Host number %Zd, name ``%s''\n", HostP - p->RIOHosts, HostP->Name);
403 rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: Rup number 0x%x\n", rup);
405 if (Rup >= (unsigned short) MAX_RUP) {
406 rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: This is the RUP for RTA ``%s''\n", HostP->Mapping[Rup].Name);
407 } else
408 rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: This is the RUP for link ``%c'' of host ``%s''\n", ('A' + Rup - MAX_RUP), HostP->Name);
410 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Destination 0x%x:0x%x\n", readb(&PacketP->dest_unit), readb(&PacketP->dest_port));
411 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Source 0x%x:0x%x\n", readb(&PacketP->src_unit), readb(&PacketP->src_port));
412 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Length 0x%x (%d)\n", readb(&PacketP->len), readb(&PacketP->len));
413 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Control 0x%x (%d)\n", readb(&PacketP->control), readb(&PacketP->control));
414 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Check 0x%x (%d)\n", readw(&PacketP->csum), readw(&PacketP->csum));
415 rio_dprintk(RIO_DEBUG_CMD, "COMMAND information: Host Port Number 0x%x, " "Command Code 0x%x\n", readb(&PktCmdP->PhbNum), readb(&PktCmdP->Command));
416 return 1;
417 }
418 PortP = p->RIOPortp[SysPort];
419 rio_spin_lock_irqsave(&PortP->portSem, flags);
420 switch (readb(&PktCmdP->Command)) {
421 case BREAK_RECEIVED:
422 rio_dprintk(RIO_DEBUG_CMD, "Received a break!\n");
423 /* If the current line disc. is not multi-threading and
424 the current processor is not the default, reset rup_intr
425 and return 0 to ensure that the command packet is
426 not freed. */
427 /* Call tmgr HANGUP HERE */
428 /* Fix this later when every thing works !!!! RAMRAJ */
429 gs_got_break(&PortP->gs);
430 break;
432 case COMPLETE:
433 rio_dprintk(RIO_DEBUG_CMD, "Command complete on phb %d host %Zd\n", readb(&PktCmdP->PhbNum), HostP - p->RIOHosts);
434 subCommand = 1;
435 switch (readb(&PktCmdP->SubCommand)) {
436 case MEMDUMP:
437 rio_dprintk(RIO_DEBUG_CMD, "Memory dump cmd (0x%x) from addr 0x%x\n", readb(&PktCmdP->SubCommand), readw(&PktCmdP->SubAddr));
438 break;
439 case READ_REGISTER:
440 rio_dprintk(RIO_DEBUG_CMD, "Read register (0x%x)\n", readw(&PktCmdP->SubAddr));
441 p->CdRegister = (readb(&PktCmdP->ModemStatus) & MSVR1_HOST);
442 break;
443 default:
444 subCommand = 0;
445 break;
446 }
447 if (subCommand)
448 break;
449 rio_dprintk(RIO_DEBUG_CMD, "New status is 0x%x was 0x%x\n", readb(&PktCmdP->PortStatus), PortP->PortState);
450 if (PortP->PortState != readb(&PktCmdP->PortStatus)) {
451 rio_dprintk(RIO_DEBUG_CMD, "Mark status & wakeup\n");
452 PortP->PortState = readb(&PktCmdP->PortStatus);
453 /* What should we do here ...
454 wakeup( &PortP->PortState );
455 */
456 } else
457 rio_dprintk(RIO_DEBUG_CMD, "No change\n");
459 /* FALLTHROUGH */
460 case MODEM_STATUS:
461 /*
462 ** Knock out the tbusy and tstop bits, as these are not relevant
463 ** to the check for modem status change (they're just there because
464 ** it's a convenient place to put them!).
465 */
466 ReportedModemStatus = readb(&PktCmdP->ModemStatus);
467 if ((PortP->ModemState & MSVR1_HOST) == (ReportedModemStatus & MSVR1_HOST)) {
468 rio_dprintk(RIO_DEBUG_CMD, "Modem status unchanged 0x%x\n", PortP->ModemState);
469 /*
470 ** Update ModemState just in case tbusy or tstop states have
471 ** changed.
472 */
473 PortP->ModemState = ReportedModemStatus;
474 } else {
475 rio_dprintk(RIO_DEBUG_CMD, "Modem status change from 0x%x to 0x%x\n", PortP->ModemState, ReportedModemStatus);
476 PortP->ModemState = ReportedModemStatus;
477 #ifdef MODEM_SUPPORT
478 if (PortP->Mapped) {
479 /***********************************************************\
480 *************************************************************
481 *** ***
482 *** M O D E M S T A T E C H A N G E ***
483 *** ***
484 *************************************************************
485 \***********************************************************/
486 /*
487 ** If the device is a modem, then check the modem
488 ** carrier.
489 */
490 if (PortP->gs.tty == NULL)
491 break;
492 if (PortP->gs.tty->termios == NULL)
493 break;
495 if (!(PortP->gs.tty->termios->c_cflag & CLOCAL) && ((PortP->State & (RIO_MOPEN | RIO_WOPEN)))) {
497 rio_dprintk(RIO_DEBUG_CMD, "Is there a Carrier?\n");
498 /*
499 ** Is there a carrier?
500 */
501 if (PortP->ModemState & MSVR1_CD) {
502 /*
503 ** Has carrier just appeared?
504 */
505 if (!(PortP->State & RIO_CARR_ON)) {
506 rio_dprintk(RIO_DEBUG_CMD, "Carrier just came up.\n");
507 PortP->State |= RIO_CARR_ON;
508 /*
509 ** wakeup anyone in WOPEN
510 */
511 if (PortP->State & (PORT_ISOPEN | RIO_WOPEN))
512 wake_up_interruptible(&PortP->gs.open_wait);
513 }
514 } else {
515 /*
516 ** Has carrier just dropped?
517 */
518 if (PortP->State & RIO_CARR_ON) {
519 if (PortP->State & (PORT_ISOPEN | RIO_WOPEN | RIO_MOPEN))
520 tty_hangup(PortP->gs.tty);
521 PortP->State &= ~RIO_CARR_ON;
522 rio_dprintk(RIO_DEBUG_CMD, "Carrirer just went down\n");
523 }
524 }
525 }
526 }
527 #endif
528 }
529 break;
531 default:
532 rio_dprintk(RIO_DEBUG_CMD, "Unknown command %d on CMD_RUP of host %Zd\n", readb(&PktCmdP->Command), HostP - p->RIOHosts);
533 break;
534 }
535 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
537 func_exit();
539 return 1;
540 }
542 /*
543 ** The command mechanism:
544 ** Each rup has a chain of commands associated with it.
545 ** This chain is maintained by routines in this file.
546 ** Periodically we are called and we run a quick check of all the
547 ** active chains to determine if there is a command to be executed,
548 ** and if the rup is ready to accept it.
549 **
550 */
552 /*
553 ** Allocate an empty command block.
554 */
555 struct CmdBlk *RIOGetCmdBlk(void)
556 {
557 struct CmdBlk *CmdBlkP;
559 CmdBlkP = (struct CmdBlk *)kmalloc(sizeof(struct CmdBlk), GFP_ATOMIC);
560 if (CmdBlkP)
561 memset(CmdBlkP, 0, sizeof(struct CmdBlk));
562 return CmdBlkP;
563 }
565 /*
566 ** Return a block to the head of the free list.
567 */
568 void RIOFreeCmdBlk(struct CmdBlk *CmdBlkP)
569 {
570 kfree(CmdBlkP);
571 }
573 /*
574 ** attach a command block to the list of commands to be performed for
575 ** a given rup.
576 */
577 int RIOQueueCmdBlk(struct Host *HostP, uint Rup, struct CmdBlk *CmdBlkP)
578 {
579 struct CmdBlk **Base;
580 struct UnixRup *UnixRupP;
581 unsigned long flags;
583 if (Rup >= (unsigned short) (MAX_RUP + LINKS_PER_UNIT)) {
584 rio_dprintk(RIO_DEBUG_CMD, "Illegal rup number %d in RIOQueueCmdBlk\n", Rup);
585 RIOFreeCmdBlk(CmdBlkP);
586 return RIO_FAIL;
587 }
589 UnixRupP = &HostP->UnixRups[Rup];
591 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
593 /*
594 ** If the RUP is currently inactive, then put the request
595 ** straight on the RUP....
596 */
597 if ((UnixRupP->CmdsWaitingP == NULL) && (UnixRupP->CmdPendingP == NULL) && (readw(&UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE) && (CmdBlkP->PreFuncP ? (*CmdBlkP->PreFuncP) (CmdBlkP->PreArg, CmdBlkP)
598 : 1)) {
599 rio_dprintk(RIO_DEBUG_CMD, "RUP inactive-placing command straight on. Cmd byte is 0x%x\n", CmdBlkP->Packet.data[0]);
601 /*
602 ** Whammy! blat that pack!
603 */
604 HostP->Copy(&CmdBlkP->Packet, RIO_PTR(HostP->Caddr, readw(&UnixRupP->RupP->txpkt)), sizeof(struct PKT));
606 /*
607 ** place command packet on the pending position.
608 */
609 UnixRupP->CmdPendingP = CmdBlkP;
611 /*
612 ** set the command register
613 */
614 writew(TX_PACKET_READY, &UnixRupP->RupP->txcontrol);
616 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
618 return 0;
619 }
620 rio_dprintk(RIO_DEBUG_CMD, "RUP active - en-queing\n");
622 if (UnixRupP->CmdsWaitingP != NULL)
623 rio_dprintk(RIO_DEBUG_CMD, "Rup active - command waiting\n");
624 if (UnixRupP->CmdPendingP != NULL)
625 rio_dprintk(RIO_DEBUG_CMD, "Rup active - command pending\n");
626 if (readw(&UnixRupP->RupP->txcontrol) != TX_RUP_INACTIVE)
627 rio_dprintk(RIO_DEBUG_CMD, "Rup active - command rup not ready\n");
629 Base = &UnixRupP->CmdsWaitingP;
631 rio_dprintk(RIO_DEBUG_CMD, "First try to queue cmdblk %p at %p\n", CmdBlkP, Base);
633 while (*Base) {
634 rio_dprintk(RIO_DEBUG_CMD, "Command cmdblk %p here\n", *Base);
635 Base = &((*Base)->NextP);
636 rio_dprintk(RIO_DEBUG_CMD, "Now try to queue cmd cmdblk %p at %p\n", CmdBlkP, Base);
637 }
639 rio_dprintk(RIO_DEBUG_CMD, "Will queue cmdblk %p at %p\n", CmdBlkP, Base);
641 *Base = CmdBlkP;
643 CmdBlkP->NextP = NULL;
645 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
647 return 0;
648 }
650 /*
651 ** Here we go - if there is an empty rup, fill it!
652 ** must be called at splrio() or higher.
653 */
654 void RIOPollHostCommands(struct rio_info *p, struct Host *HostP)
655 {
656 struct CmdBlk *CmdBlkP;
657 struct UnixRup *UnixRupP;
658 struct PKT __iomem *PacketP;
659 unsigned short Rup;
660 unsigned long flags;
663 Rup = MAX_RUP + LINKS_PER_UNIT;
665 do { /* do this loop for each RUP */
666 /*
667 ** locate the rup we are processing & lock it
668 */
669 UnixRupP = &HostP->UnixRups[--Rup];
671 spin_lock_irqsave(&UnixRupP->RupLock, flags);
673 /*
674 ** First check for incoming commands:
675 */
676 if (readw(&UnixRupP->RupP->rxcontrol) != RX_RUP_INACTIVE) {
677 int FreeMe;
679 PacketP = (struct PKT __iomem *) RIO_PTR(HostP->Caddr, readw(&UnixRupP->RupP->rxpkt));
681 switch (readb(&PacketP->dest_port)) {
682 case BOOT_RUP:
683 rio_dprintk(RIO_DEBUG_CMD, "Incoming Boot %s packet '%x'\n", readb(&PacketP->len) & 0x80 ? "Command" : "Data", readb(&PacketP->data[0]));
684 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
685 FreeMe = RIOBootRup(p, Rup, HostP, PacketP);
686 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
687 break;
689 case COMMAND_RUP:
690 /*
691 ** Free the RUP lock as loss of carrier causes a
692 ** ttyflush which will (eventually) call another
693 ** routine that uses the RUP lock.
694 */
695 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
696 FreeMe = RIOCommandRup(p, Rup, HostP, PacketP);
697 if (readb(&PacketP->data[5]) == MEMDUMP) {
698 rio_dprintk(RIO_DEBUG_CMD, "Memdump from 0x%x complete\n", readw(&(PacketP->data[6])));
699 rio_memcpy_fromio(p->RIOMemDump, &(PacketP->data[8]), 32);
700 }
701 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
702 break;
704 case ROUTE_RUP:
705 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
706 FreeMe = RIORouteRup(p, Rup, HostP, PacketP);
707 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
708 break;
710 default:
711 rio_dprintk(RIO_DEBUG_CMD, "Unknown RUP %d\n", readb(&PacketP->dest_port));
712 FreeMe = 1;
713 break;
714 }
716 if (FreeMe) {
717 rio_dprintk(RIO_DEBUG_CMD, "Free processed incoming command packet\n");
718 put_free_end(HostP, PacketP);
720 writew(RX_RUP_INACTIVE, &UnixRupP->RupP->rxcontrol);
722 if (readw(&UnixRupP->RupP->handshake) == PHB_HANDSHAKE_SET) {
723 rio_dprintk(RIO_DEBUG_CMD, "Handshake rup %d\n", Rup);
724 writew(PHB_HANDSHAKE_SET | PHB_HANDSHAKE_RESET, &UnixRupP->RupP->handshake);
725 }
726 }
727 }
729 /*
730 ** IF a command was running on the port,
731 ** and it has completed, then tidy it up.
732 */
733 if ((CmdBlkP = UnixRupP->CmdPendingP) && /* ASSIGN! */
734 (readw(&UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) {
735 /*
736 ** we are idle.
737 ** there is a command in pending.
738 ** Therefore, this command has finished.
739 ** So, wakeup whoever is waiting for it (and tell them
740 ** what happened).
741 */
742 if (CmdBlkP->Packet.dest_port == BOOT_RUP)
743 rio_dprintk(RIO_DEBUG_CMD, "Free Boot %s Command Block '%x'\n", CmdBlkP->Packet.len & 0x80 ? "Command" : "Data", CmdBlkP->Packet.data[0]);
745 rio_dprintk(RIO_DEBUG_CMD, "Command %p completed\n", CmdBlkP);
747 /*
748 ** Clear the Rup lock to prevent mutual exclusion.
749 */
750 if (CmdBlkP->PostFuncP) {
751 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
752 (*CmdBlkP->PostFuncP) (CmdBlkP->PostArg, CmdBlkP);
753 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
754 }
756 /*
757 ** ....clear the pending flag....
758 */
759 UnixRupP->CmdPendingP = NULL;
761 /*
762 ** ....and return the command block to the freelist.
763 */
764 RIOFreeCmdBlk(CmdBlkP);
765 }
767 /*
768 ** If there is a command for this rup, and the rup
769 ** is idle, then process the command
770 */
771 if ((CmdBlkP = UnixRupP->CmdsWaitingP) && /* ASSIGN! */
772 (UnixRupP->CmdPendingP == NULL) && (readw(&UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) {
773 /*
774 ** if the pre-function is non-zero, call it.
775 ** If it returns RIO_FAIL then don't
776 ** send this command yet!
777 */
778 if (!(CmdBlkP->PreFuncP ? (*CmdBlkP->PreFuncP) (CmdBlkP->PreArg, CmdBlkP) : 1)) {
779 rio_dprintk(RIO_DEBUG_CMD, "Not ready to start command %p\n", CmdBlkP);
780 } else {
781 rio_dprintk(RIO_DEBUG_CMD, "Start new command %p Cmd byte is 0x%x\n", CmdBlkP, CmdBlkP->Packet.data[0]);
782 /*
783 ** Whammy! blat that pack!
784 */
785 HostP->Copy(&CmdBlkP->Packet, RIO_PTR(HostP->Caddr, readw(&UnixRupP->RupP->txpkt)), sizeof(struct PKT));
787 /*
788 ** remove the command from the rup command queue...
789 */
790 UnixRupP->CmdsWaitingP = CmdBlkP->NextP;
792 /*
793 ** ...and place it on the pending position.
794 */
795 UnixRupP->CmdPendingP = CmdBlkP;
797 /*
798 ** set the command register
799 */
800 writew(TX_PACKET_READY, &UnixRupP->RupP->txcontrol);
802 /*
803 ** the command block will be freed
804 ** when the command has been processed.
805 */
806 }
807 }
808 spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
809 } while (Rup);
810 }
812 int RIOWFlushMark(unsigned long iPortP, struct CmdBlk *CmdBlkP)
813 {
814 struct Port *PortP = (struct Port *) iPortP;
815 unsigned long flags;
817 rio_spin_lock_irqsave(&PortP->portSem, flags);
818 PortP->WflushFlag++;
819 PortP->MagicFlags |= MAGIC_FLUSH;
820 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
821 return RIOUnUse(iPortP, CmdBlkP);
822 }
824 int RIORFlushEnable(unsigned long iPortP, struct CmdBlk *CmdBlkP)
825 {
826 struct Port *PortP = (struct Port *) iPortP;
827 struct PKT __iomem *PacketP;
828 unsigned long flags;
830 rio_spin_lock_irqsave(&PortP->portSem, flags);
832 while (can_remove_receive(&PacketP, PortP)) {
833 remove_receive(PortP);
834 put_free_end(PortP->HostP, PacketP);
835 }
837 if (readw(&PortP->PhbP->handshake) == PHB_HANDSHAKE_SET) {
838 /*
839 ** MAGIC! (Basically, handshake the RX buffer, so that
840 ** the RTAs upstream can be re-enabled.)
841 */
842 rio_dprintk(RIO_DEBUG_CMD, "Util: Set RX handshake bit\n");
843 writew(PHB_HANDSHAKE_SET | PHB_HANDSHAKE_RESET, &PortP->PhbP->handshake);
844 }
845 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
846 return RIOUnUse(iPortP, CmdBlkP);
847 }
849 int RIOUnUse(unsigned long iPortP, struct CmdBlk *CmdBlkP)
850 {
851 struct Port *PortP = (struct Port *) iPortP;
852 unsigned long flags;
854 rio_spin_lock_irqsave(&PortP->portSem, flags);
856 rio_dprintk(RIO_DEBUG_CMD, "Decrement in use count for port\n");
858 if (PortP->InUse) {
859 if (--PortP->InUse != NOT_INUSE) {
860 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
861 return 0;
862 }
863 }
864 /*
865 ** While PortP->InUse is set (i.e. a preemptive command has been sent to
866 ** the RTA and is awaiting completion), any transmit data is prevented from
867 ** being transferred from the write queue into the transmit packets
868 ** (add_transmit) and no furthur transmit interrupt will be sent for that
869 ** data. The next interrupt will occur up to 500ms later (RIOIntr is called
870 ** twice a second as a saftey measure). This was the case when kermit was
871 ** used to send data into a RIO port. After each packet was sent, TCFLSH
872 ** was called to flush the read queue preemptively. PortP->InUse was
873 ** incremented, thereby blocking the 6 byte acknowledgement packet
874 ** transmitted back. This acknowledgment hung around for 500ms before
875 ** being sent, thus reducing input performance substantially!.
876 ** When PortP->InUse becomes NOT_INUSE, we must ensure that any data
877 ** hanging around in the transmit buffer is sent immediately.
878 */
879 writew(1, &PortP->HostP->ParmMapP->tx_intr);
880 /* What to do here ..
881 wakeup( (caddr_t)&(PortP->InUse) );
882 */
883 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
884 return 0;
885 }
887 /*
888 **
889 ** How to use this file:
890 **
891 ** To send a command down a rup, you need to allocate a command block, fill
892 ** in the packet information, fill in the command number, fill in the pre-
893 ** and post- functions and arguments, and then add the command block to the
894 ** queue of command blocks for the port in question. When the port is idle,
895 ** then the pre-function will be called. If this returns RIO_FAIL then the
896 ** command will be re-queued and tried again at a later date (probably in one
897 ** clock tick). If the pre-function returns NOT RIO_FAIL, then the command
898 ** packet will be queued on the RUP, and the txcontrol field set to the
899 ** command number. When the txcontrol field has changed from being the
900 ** command number, then the post-function will be called, with the argument
901 ** specified earlier, a pointer to the command block, and the value of
902 ** txcontrol.
903 **
904 ** To allocate a command block, call RIOGetCmdBlk(). This returns a pointer
905 ** to the command block structure allocated, or NULL if there aren't any.
906 ** The block will have been zeroed for you.
907 **
908 ** The structure has the following fields:
909 **
910 ** struct CmdBlk
911 ** {
912 ** struct CmdBlk *NextP; ** Pointer to next command block **
913 ** struct PKT Packet; ** A packet, to copy to the rup **
914 ** int (*PreFuncP)(); ** The func to call to check if OK **
915 ** int PreArg; ** The arg for the func **
916 ** int (*PostFuncP)(); ** The func to call when completed **
917 ** int PostArg; ** The arg for the func **
918 ** };
919 **
920 ** You need to fill in ALL fields EXCEPT NextP, which is used to link the
921 ** blocks together either on the free list or on the Rup list.
922 **
923 ** Packet is an actual packet structure to be filled in with the packet
924 ** information associated with the command. You need to fill in everything,
925 ** as the command processore doesn't process the command packet in any way.
926 **
927 ** The PreFuncP is called before the packet is enqueued on the host rup.
928 ** PreFuncP is called as (*PreFuncP)(PreArg, CmdBlkP);. PreFuncP must
929 ** return !RIO_FAIL to have the packet queued on the rup, and RIO_FAIL
930 ** if the packet is NOT to be queued.
931 **
932 ** The PostFuncP is called when the command has completed. It is called
933 ** as (*PostFuncP)(PostArg, CmdBlkP, txcontrol);. PostFuncP is not expected
934 ** to return a value. PostFuncP does NOT need to free the command block,
935 ** as this happens automatically after PostFuncP returns.
936 **
937 ** Once the command block has been filled in, it is attached to the correct
938 ** queue by calling RIOQueueCmdBlk( HostP, Rup, CmdBlkP ) where HostP is
939 ** a pointer to the struct Host, Rup is the NUMBER of the rup (NOT a pointer
940 ** to it!), and CmdBlkP is the pointer to the command block allocated using
941 ** RIOGetCmdBlk().
942 **
943 */