?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Expand PMF_FN_* macros.
[netbsd-mini2440.git] / sys / arch / amiga / dev / siop.c
blob873112ce8cbcb9999d00e67c6fcfa0c239454fa0
1 /* $NetBSD: siop.c,v 1.63 2009/03/18 17:06:42 cegger Exp $ */
2
3 /*
4 * Copyright (c) 1990 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Van Jacobson of Lawrence Berkeley Laboratory.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)siop.c 7.5 (Berkeley) 5/4/91
35 */
36
37 /*
38 * Copyright (c) 1994 Michael L. Hitch
39 *
40 * This code is derived from software contributed to Berkeley by
41 * Van Jacobson of Lawrence Berkeley Laboratory.
42 *
43 * Redistribution and use in source and binary forms, with or without
44 * modification, are permitted provided that the following conditions
45 * are met:
46 * 1. Redistributions of source code must retain the above copyright
47 * notice, this list of conditions and the following disclaimer.
48 * 2. Redistributions in binary form must reproduce the above copyright
49 * notice, this list of conditions and the following disclaimer in the
50 * documentation and/or other materials provided with the distribution.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
53 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
54 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
55 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
56 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
57 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
61 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62 *
63 * @(#)siop.c 7.5 (Berkeley) 5/4/91
64 */
65
66 /*
67 * AMIGA 53C710 scsi adaptor driver
68 */
69
70 #include "opt_ddb.h"
71
72 #include <sys/cdefs.h>
73 __KERNEL_RCSID(0, "$NetBSD: siop.c,v 1.63 2009/03/18 17:06:42 cegger Exp $");
74
75 #include <sys/param.h>
76 #include <sys/systm.h>
77 #include <sys/callout.h>
78 #include <sys/kernel.h>
79 #include <sys/device.h>
80 #include <sys/disklabel.h>
81 #include <sys/buf.h>
82 #include <sys/malloc.h>
83
84 #include <uvm/uvm_extern.h>
85
86 #include <dev/scsipi/scsi_all.h>
87 #include <dev/scsipi/scsipi_all.h>
88 #include <dev/scsipi/scsiconf.h>
89 #include <machine/cpu.h>
90 #ifdef __m68k__
91 #include <m68k/cacheops.h>
92 #endif
93 #include <amiga/amiga/custom.h>
94 #include <amiga/amiga/isr.h>
95 #include <amiga/dev/siopreg.h>
96 #include <amiga/dev/siopvar.h>
97
98 /*
99 * SCSI delays
100 * In u-seconds, primarily for state changes on the SPC.
101 */
102 #define SCSI_CMD_WAIT 500000 /* wait per step of 'immediate' cmds */
103 #define SCSI_DATA_WAIT 500000 /* wait per data in/out step */
104 #define SCSI_INIT_WAIT 500000 /* wait per step (both) during init */
105
106 void siop_select(struct siop_softc *);
107 void siopabort(struct siop_softc *, siop_regmap_p, const char *);
108 void sioperror(struct siop_softc *, siop_regmap_p, u_char);
109 void siopstart(struct siop_softc *);
110 int siop_checkintr(struct siop_softc *, u_char, u_char, u_char, int *);
111 void siopreset(struct siop_softc *);
112 void siopsetdelay(int);
113 void siop_scsidone(struct siop_acb *, int);
114 void siop_timeout(void *);
115 void siop_sched(struct siop_softc *);
116 void siop_poll(struct siop_softc *, struct siop_acb *);
117 void siopintr(struct siop_softc *);
118 void scsi_period_to_siop(struct siop_softc *, int);
119 void siop_start(struct siop_softc *, int, int, u_char *, int, u_char *, int);
120 void siop_dump_acb(struct siop_acb *);
121
122 /* 53C710 script */
123 const
124 #include <amiga/dev/siop_script.out>
125
126 /* default to not inhibit sync negotiation on any drive */
127 u_char siop_inhibit_sync[8] = { 0, 0, 0, 0, 0, 0, 0 }; /* initialize, so patchable */
128 u_char siop_allow_disc[8] = {3, 3, 3, 3, 3, 3, 3, 3};
129 int siop_no_dma = 0;
130
131 int siop_reset_delay = 250; /* delay after reset, in milleseconds */
132
133 int siop_cmd_wait = SCSI_CMD_WAIT;
134 int siop_data_wait = SCSI_DATA_WAIT;
135 int siop_init_wait = SCSI_INIT_WAIT;
136
137 #ifdef DEBUG_SYNC
138 /*
139 * sync period transfer lookup - only valid for 66 MHz clock
140 */
141 static struct {
142 unsigned char p; /* period from sync request message */
143 unsigned char r; /* siop_period << 4 | sbcl */
144 } sync_tab[] = {
145 { 60/4, 0<<4 | 1},
146 { 76/4, 1<<4 | 1},
147 { 92/4, 2<<4 | 1},
148 { 92/4, 0<<4 | 2},
149 {108/4, 3<<4 | 1},
150 {116/4, 1<<4 | 2},
151 {120/4, 4<<4 | 1},
152 {120/4, 0<<4 | 3},
153 {136/4, 5<<4 | 1},
154 {140/4, 2<<4 | 2},
155 {152/4, 6<<4 | 1},
156 {152/4, 1<<4 | 3},
157 {164/4, 3<<4 | 2},
158 {168/4, 7<<4 | 1},
159 {180/4, 2<<4 | 3},
160 {184/4, 4<<4 | 2},
161 {208/4, 5<<4 | 2},
162 {212/4, 3<<4 | 3},
163 {232/4, 6<<4 | 2},
164 {240/4, 4<<4 | 3},
165 {256/4, 7<<4 | 2},
166 {272/4, 5<<4 | 3},
167 {300/4, 6<<4 | 3},
168 {332/4, 7<<4 | 3}
169 };
170 #endif
171
172 #ifdef DEBUG
173 /*
174 * 0x01 - full debug
175 * 0x02 - DMA chaining
176 * 0x04 - siopintr
177 * 0x08 - phase mismatch
178 * 0x10 - <not used>
179 * 0x20 - panic on unhandled exceptions
180 * 0x100 - disconnect/reselect
181 */
182 int siop_debug = 0;
183 int siopsync_debug = 0;
184 int siopdma_hits = 0;
185 int siopdma_misses = 0;
186 int siopchain_ints = 0;
187 int siopstarts = 0;
188 int siopints = 0;
189 int siopphmm = 0;
190 #define SIOP_TRACE_SIZE 128
191 #define SIOP_TRACE(a,b,c,d) \
192 siop_trbuf[siop_trix] = (a); \
193 siop_trbuf[siop_trix+1] = (b); \
194 siop_trbuf[siop_trix+2] = (c); \
195 siop_trbuf[siop_trix+3] = (d); \
196 siop_trix = (siop_trix + 4) & (SIOP_TRACE_SIZE - 1);
197 u_char siop_trbuf[SIOP_TRACE_SIZE];
198 int siop_trix;
199 void siop_dump(struct siop_softc *);
200 void siop_dump_trace(void);
201 #else
202 #define SIOP_TRACE(a,b,c,d)
203 #endif
204
205
206 /*
207 * default minphys routine for siop based controllers
208 */
209 void
210 siop_minphys(struct buf *bp)
211 {
212
213 /*
214 * No max transfer at this level.
215 */
216 minphys(bp);
217 }
218
219 /*
220 * used by specific siop controller
221 *
222 */
223 void
224 siop_scsipi_request(struct scsipi_channel *chan, scsipi_adapter_req_t req,
225 void *arg)
226 {
227 struct scsipi_xfer *xs;
228 struct scsipi_periph *periph;
229 struct siop_acb *acb;
230 struct siop_softc *sc = (void *)chan->chan_adapter->adapt_dev;
231 int flags, s;
232
233 switch (req) {
234 case ADAPTER_REQ_RUN_XFER:
235 xs = arg;
236 periph = xs->xs_periph;
237 flags = xs->xs_control;
238
239 /* XXXX ?? */
240 if (flags & XS_CTL_DATA_UIO)
241 panic("siop: scsi data uio requested");
242
243 /* XXXX ?? */
244 if (sc->sc_nexus && flags & XS_CTL_POLL)
245 /* panic("siop_scsicmd: busy");*/
246 printf("siop_scsicmd: busy\n");
247
248 s = splbio();
249 acb = sc->free_list.tqh_first;
250 if (acb) {
251 TAILQ_REMOVE(&sc->free_list, acb, chain);
252 }
253 splx(s);
254
255 #ifdef DIAGNOSTIC
256 /*
257 * This should never happen as we track the resources
258 * in the mid-layer.
259 */
260 if (acb == NULL) {
261 scsipi_printaddr(periph);
262 printf("unable to allocate acb\n");
263 panic("siop_scsipi_request");
264 }
265 #endif
266
267 acb->flags = ACB_ACTIVE;
268 acb->xs = xs;
269 memcpy(&acb->cmd, xs->cmd, xs->cmdlen);
270 acb->clen = xs->cmdlen;
271 acb->daddr = xs->data;
272 acb->dleft = xs->datalen;
273
274 s = splbio();
275 TAILQ_INSERT_TAIL(&sc->ready_list, acb, chain);
276
277 if (sc->sc_nexus == NULL)
278 siop_sched(sc);
279
280 splx(s);
281
282 if (flags & XS_CTL_POLL || siop_no_dma)
283 siop_poll(sc, acb);
284 return;
285
286 case ADAPTER_REQ_GROW_RESOURCES:
287 return;
288
289 case ADAPTER_REQ_SET_XFER_MODE:
290 return;
291 }
292 }
293
294 void
295 siop_poll(struct siop_softc *sc, struct siop_acb *acb)
296 {
297 siop_regmap_p rp = sc->sc_siopp;
298 struct scsipi_xfer *xs = acb->xs;
299 int i;
300 int status;
301 u_char istat;
302 u_char dstat;
303 u_char sstat0;
304 int s;
305 int to;
306
307 s = splbio();
308 to = xs->timeout / 1000;
309 if (sc->nexus_list.tqh_first)
310 printf("%s: siop_poll called with disconnected device\n",
311 sc->sc_dev.dv_xname);
312 for (;;) {
313 /* use cmd_wait values? */
314 i = 50000;
315 /* XXX spl0(); */
316 while (((istat = rp->siop_istat) &
317 (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) {
318 if (--i <= 0) {
319 #ifdef DEBUG
320 printf ("waiting: tgt %d cmd %02x sbcl %02x dsp %lx (+%lx) dcmd %lx ds %p timeout %d\n",
321 xs->xs_periph->periph_target, acb->cmd.opcode,
322 rp->siop_sbcl, rp->siop_dsp,
323 rp->siop_dsp - sc->sc_scriptspa,
324 *((volatile long *)&rp->siop_dcmd), &acb->ds, acb->xs->timeout);
325 #endif
326 i = 50000;
327 --to;
328 if (to <= 0) {
329 siopreset(sc);
330 return;
331 }
332 }
333 delay(20);
334 }
335 sstat0 = rp->siop_sstat0;
336 dstat = rp->siop_dstat;
337 if (siop_checkintr(sc, istat, dstat, sstat0, &status)) {
338 if (acb != sc->sc_nexus)
339 printf("%s: siop_poll disconnected device completed\n",
340 sc->sc_dev.dv_xname);
341 else if ((sc->sc_flags & SIOP_INTDEFER) == 0) {
342 sc->sc_flags &= ~SIOP_INTSOFF;
343 rp->siop_sien = sc->sc_sien;
344 rp->siop_dien = sc->sc_dien;
345 }
346 siop_scsidone(sc->sc_nexus, status);
347 }
348
349 if (xs->xs_status & XS_STS_DONE)
350 break;
351 }
352 splx(s);
353 }
354
355 /*
356 * start next command that's ready
357 */
358 void
359 siop_sched(struct siop_softc *sc)
360 {
361 struct scsipi_periph *periph;
362 struct siop_acb *acb;
363 int i;
364
365 #ifdef DEBUG
366 if (sc->sc_nexus) {
367 printf("%s: siop_sched- nexus %p/%d ready %p/%d\n",
368 sc->sc_dev.dv_xname, sc->sc_nexus,
369 sc->sc_nexus->xs->xs_periph->periph_target,
370 sc->ready_list.tqh_first,
371 sc->ready_list.tqh_first->xs->xs_periph->periph_target);
372 return;
373 }
374 #endif
375 for (acb = sc->ready_list.tqh_first; acb; acb = acb->chain.tqe_next) {
376 periph = acb->xs->xs_periph;
377 i = periph->periph_target;
378 if(!(sc->sc_tinfo[i].lubusy & (1 << periph->periph_lun))) {
379 struct siop_tinfo *ti = &sc->sc_tinfo[i];
380
381 TAILQ_REMOVE(&sc->ready_list, acb, chain);
382 sc->sc_nexus = acb;
383 periph = acb->xs->xs_periph;
384 ti = &sc->sc_tinfo[periph->periph_target];
385 ti->lubusy |= (1 << periph->periph_lun);
386 break;
387 }
388 }
389
390 if (acb == NULL) {
391 #ifdef DEBUGXXX
392 printf("%s: siop_sched didn't find ready command\n",
393 sc->sc_dev.dv_xname);
394 #endif
395 return;
396 }
397
398 if (acb->xs->xs_control & XS_CTL_RESET)
399 siopreset(sc);
400
401 #if 0
402 acb->cmd.bytes[0] |= slp->scsipi_scsi.lun << 5; /* XXXX */
403 #endif
404 ++sc->sc_active;
405 siop_select(sc);
406 }
407
408 void
409 siop_scsidone(struct siop_acb *acb, int stat)
410 {
411 struct scsipi_xfer *xs;
412 struct scsipi_periph *periph;
413 struct siop_softc *sc;
414 int dosched = 0;
415
416 if (acb == NULL || (xs = acb->xs) == NULL) {
417 #ifdef DIAGNOSTIC
418 printf("siop_scsidone: NULL acb or scsipi_xfer\n");
419 #if defined(DEBUG) && defined(DDB)
420 Debugger();
421 #endif
422 #endif
423 return;
424 }
425
426 callout_stop(&xs->xs_callout);
427
428 periph = xs->xs_periph;
429 sc = (void *)periph->periph_channel->chan_adapter->adapt_dev;
430
431 xs->status = stat;
432 xs->resid = 0; /* XXXX */
433
434 if (xs->error == XS_NOERROR) {
435 if (stat == SCSI_CHECK || stat == SCSI_BUSY)
436 xs->error = XS_BUSY;
437 }
438
439 /*
440 * Remove the ACB from whatever queue it's on. We have to do a bit of
441 * a hack to figure out which queue it's on. Note that it is *not*
442 * necessary to cdr down the ready queue, but we must cdr down the
443 * nexus queue and see if it's there, so we can mark the unit as no
444 * longer busy. This code is sickening, but it works.
445 */
446 if (acb == sc->sc_nexus) {
447 sc->sc_nexus = NULL;
448 sc->sc_tinfo[periph->periph_target].lubusy &=
449 ~(1<<periph->periph_lun);
450 if (sc->ready_list.tqh_first)
451 dosched = 1; /* start next command */
452 --sc->sc_active;
453 SIOP_TRACE('d','a',stat,0)
454 } else if (sc->ready_list.tqh_last == &acb->chain.tqe_next) {
455 TAILQ_REMOVE(&sc->ready_list, acb, chain);
456 SIOP_TRACE('d','r',stat,0)
457 } else {
458 register struct siop_acb *acb2;
459 for (acb2 = sc->nexus_list.tqh_first; acb2;
460 acb2 = acb2->chain.tqe_next)
461 if (acb2 == acb) {
462 TAILQ_REMOVE(&sc->nexus_list, acb, chain);
463 sc->sc_tinfo[periph->periph_target].lubusy
464 &= ~(1<<periph->periph_lun);
465 --sc->sc_active;
466 break;
467 }
468 if (acb2)
469 ;
470 else if (acb->chain.tqe_next) {
471 TAILQ_REMOVE(&sc->ready_list, acb, chain);
472 --sc->sc_active;
473 } else {
474 printf("%s: can't find matching acb\n",
475 sc->sc_dev.dv_xname);
476 #ifdef DDB
477 /* Debugger(); */
478 #endif
479 }
480 SIOP_TRACE('d','n',stat,0);
481 }
482 /* Put it on the free list. */
483 acb->flags = ACB_FREE;
484 TAILQ_INSERT_HEAD(&sc->free_list, acb, chain);
485
486 sc->sc_tinfo[periph->periph_target].cmds++;
487
488 scsipi_done(xs);
489
490 if (dosched && sc->sc_nexus == NULL)
491 siop_sched(sc);
492 }
493
494 void
495 siopabort(register struct siop_softc *sc, siop_regmap_p rp, const char *where)
496 {
497 #ifdef fix_this
498 int i;
499 #endif
500
501 printf ("%s: abort %s: dstat %02x, sstat0 %02x sbcl %02x\n",
502 sc->sc_dev.dv_xname,
503 where, rp->siop_dstat, rp->siop_sstat0, rp->siop_sbcl);
504
505 if (sc->sc_active > 0) {
506 #ifdef TODO
507 SET_SBIC_cmd (rp, SBIC_CMD_ABORT);
508 WAIT_CIP (rp);
509
510 GET_SBIC_asr (rp, asr);
511 if (asr & (SBIC_ASR_BSY|SBIC_ASR_LCI))
512 {
513 /* ok, get more drastic.. */
514
515 SET_SBIC_cmd (rp, SBIC_CMD_RESET);
516 delay(25);
517 SBIC_WAIT(rp, SBIC_ASR_INT, 0);
518 GET_SBIC_csr (rp, csr); /* clears interrupt also */
519
520 return;
521 }
522
523 do
524 {
525 SBIC_WAIT (rp, SBIC_ASR_INT, 0);
526 GET_SBIC_csr (rp, csr);
527 }
528 while ((csr != SBIC_CSR_DISC) && (csr != SBIC_CSR_DISC_1)
529 && (csr != SBIC_CSR_CMD_INVALID));
530 #endif
531
532 /* lets just hope it worked.. */
533 #ifdef fix_this
534 for (i = 0; i < 2; ++i) {
535 if (sc->sc_iob[i].sc_xs && &sc->sc_iob[i] !=
536 sc->sc_cur) {
537 printf ("siopabort: cleanup!\n");
538 sc->sc_iob[i].sc_xs = NULL;
539 }
540 }
541 #endif /* fix_this */
542 /* sc->sc_active = 0; */
543 }
544 }
545
546 void
547 siopinitialize(struct siop_softc *sc)
548 {
549 int i;
550 u_int inhibit_sync;
551 extern u_long scsi_nosync;
552 extern int shift_nosync;
553
554 /*
555 * Need to check that scripts is on a long word boundary
556 * Also should verify that dev doesn't span non-contiguous
557 * physical pages.
558 */
559 sc->sc_scriptspa = kvtop((void *)__UNCONST(scripts));
560
561 /*
562 * malloc sc_acb to ensure that DS is on a long word boundary.
563 */
564
565 sc->sc_acb = malloc(sizeof(struct siop_acb) * SIOP_NACB,
566 M_DEVBUF, M_NOWAIT);
567 if (sc->sc_acb == NULL)
568 panic("siopinitialize: ACB malloc failed!");
569
570 sc->sc_tcp[1] = 1000 / sc->sc_clock_freq;
571 sc->sc_tcp[2] = 1500 / sc->sc_clock_freq;
572 sc->sc_tcp[3] = 2000 / sc->sc_clock_freq;
573 sc->sc_minsync = sc->sc_tcp[1]; /* in 4ns units */
574 if (sc->sc_minsync < 25)
575 sc->sc_minsync = 25;
576 if (sc->sc_clock_freq <= 25) {
577 sc->sc_dcntl |= 0x80; /* SCLK/1 */
578 sc->sc_tcp[0] = sc->sc_tcp[1];
579 } else if (sc->sc_clock_freq <= 37) {
580 sc->sc_dcntl |= 0x40; /* SCLK/1.5 */
581 sc->sc_tcp[0] = sc->sc_tcp[2];
582 } else if (sc->sc_clock_freq <= 50) {
583 sc->sc_dcntl |= 0x00; /* SCLK/2 */
584 sc->sc_tcp[0] = sc->sc_tcp[3];
585 } else {
586 sc->sc_dcntl |= 0xc0; /* SCLK/3 */
587 sc->sc_tcp[0] = 3000 / sc->sc_clock_freq;
588 }
589
590 if (scsi_nosync) {
591 inhibit_sync = (scsi_nosync >> shift_nosync) & 0xff;
592 shift_nosync += 8;
593 #ifdef DEBUG
594 if (inhibit_sync)
595 printf("%s: Inhibiting synchronous transfer %02x\n",
596 sc->sc_dev.dv_xname, inhibit_sync);
597 #endif
598 for (i = 0; i < 8; ++i)
599 if (inhibit_sync & (1 << i))
600 siop_inhibit_sync[i] = 1;
601 }
602
603 siopreset (sc);
604 }
605
606 void
607 siop_timeout(void *arg)
608 {
609 struct siop_acb *acb;
610 struct scsipi_periph *periph;
611 struct siop_softc *sc;
612 int s;
613
614 acb = arg;
615 periph = acb->xs->xs_periph;
616 sc = device_private(periph->periph_channel->chan_adapter->adapt_dev);
617 scsipi_printaddr(periph);
618 printf("timed out\n");
619
620 s = splbio();
621
622 acb->xs->error = XS_TIMEOUT;
623 siopreset(sc);
624
625 splx(s);
626 }
627
628 void
629 siopreset(struct siop_softc *sc)
630 {
631 siop_regmap_p rp;
632 u_int i, s;
633 u_char dummy;
634 struct siop_acb *acb;
635
636 rp = sc->sc_siopp;
637
638 if (sc->sc_flags & SIOP_ALIVE)
639 siopabort(sc, rp, "reset");
640
641 printf("%s: ", sc->sc_dev.dv_xname); /* XXXX */
642
643 s = splbio();
644
645 /*
646 * Reset the chip
647 * XXX - is this really needed?
648 */
649 rp->siop_istat |= SIOP_ISTAT_ABRT; /* abort current script */
650 rp->siop_istat |= SIOP_ISTAT_RST; /* reset chip */
651 rp->siop_istat &= ~SIOP_ISTAT_RST;
652 /*
653 * Reset SCSI bus (do we really want this?)
654 */
655 rp->siop_sien = 0;
656 rp->siop_scntl1 |= SIOP_SCNTL1_RST;
657 delay(1);
658 rp->siop_scntl1 &= ~SIOP_SCNTL1_RST;
659
660 /*
661 * Set up various chip parameters
662 */
663 rp->siop_scntl0 = SIOP_ARB_FULL | SIOP_SCNTL0_EPC | SIOP_SCNTL0_EPG;
664 rp->siop_scntl1 = SIOP_SCNTL1_ESR;
665 rp->siop_dcntl = sc->sc_dcntl;
666 rp->siop_dmode = 0x80; /* burst length = 4 */
667 rp->siop_sien = 0x00; /* don't enable interrupts yet */
668 rp->siop_dien = 0x00; /* don't enable interrupts yet */
669 rp->siop_scid = 1 << sc->sc_channel.chan_id;
670 rp->siop_dwt = 0x00;
671 rp->siop_ctest0 |= SIOP_CTEST0_BTD | SIOP_CTEST0_EAN;
672 rp->siop_ctest7 |= sc->sc_ctest7;
673
674 /* will need to re-negotiate sync xfers */
675 memset(&sc->sc_sync, 0, sizeof (sc->sc_sync));
676
677 i = rp->siop_istat;
678 if (i & SIOP_ISTAT_SIP)
679 dummy = rp->siop_sstat0;
680 if (i & SIOP_ISTAT_DIP)
681 dummy = rp->siop_dstat;
682
683 splx (s);
684
685 delay (siop_reset_delay * 1000);
686 printf("siop id %d reset V%d\n", sc->sc_channel.chan_id,
687 rp->siop_ctest8 >> 4);
688
689 if ((sc->sc_flags & SIOP_ALIVE) == 0) {
690 TAILQ_INIT(&sc->ready_list);
691 TAILQ_INIT(&sc->nexus_list);
692 TAILQ_INIT(&sc->free_list);
693 sc->sc_nexus = NULL;
694 acb = sc->sc_acb;
695 memset(acb, 0, sizeof(struct siop_acb) * SIOP_NACB);
696 for (i = 0; i < SIOP_NACB; i++) {
697 TAILQ_INSERT_TAIL(&sc->free_list, acb, chain);
698 acb++;
699 }
700 memset(sc->sc_tinfo, 0, sizeof(sc->sc_tinfo));
701 } else {
702 if (sc->sc_nexus != NULL) {
703 sc->sc_nexus->xs->error = XS_RESET;
704 siop_scsidone(sc->sc_nexus, sc->sc_nexus->stat[0]);
705 }
706 while ((acb = sc->nexus_list.tqh_first) > 0) {
707 acb->xs->error = XS_RESET;
708 siop_scsidone(acb, acb->stat[0]);
709 }
710 }
711
712 sc->sc_flags |= SIOP_ALIVE;
713 sc->sc_flags &= ~(SIOP_INTDEFER|SIOP_INTSOFF);
714 /* enable SCSI and DMA interrupts */
715 sc->sc_sien = SIOP_SIEN_M_A | SIOP_SIEN_STO | /*SIOP_SIEN_SEL |*/ SIOP_SIEN_SGE |
716 SIOP_SIEN_UDC | SIOP_SIEN_RST | SIOP_SIEN_PAR;
717 sc->sc_dien = SIOP_DIEN_BF | SIOP_DIEN_ABRT | SIOP_DIEN_SIR |
718 /*SIOP_DIEN_WTD |*/ SIOP_DIEN_IID;
719 rp->siop_sien = sc->sc_sien;
720 rp->siop_dien = sc->sc_dien;
721 }
722
723 /*
724 * Setup Data Storage for 53C710 and start SCRIPTS processing
725 */
726
727 void
728 siop_start(struct siop_softc *sc, int target, int lun, u_char *cbuf, int clen,
729 u_char *buf, int len)
730 {
731 siop_regmap_p rp = sc->sc_siopp;
732 int nchain;
733 int count, tcount;
734 char *addr, *dmaend;
735 struct siop_acb *acb = sc->sc_nexus;
736 #ifdef DEBUG
737 int i;
738 #endif
739
740 #ifdef DEBUG
741 if (siop_debug & 0x100 && rp->siop_sbcl & SIOP_BSY) {
742 printf ("ACK! siop was busy: rp %p script %p dsa %p active %ld\n",
743 rp, &scripts, &acb->ds, sc->sc_active);
744 printf ("istat %02x sfbr %02x lcrc %02x sien %02x dien %02x\n",
745 rp->siop_istat, rp->siop_sfbr, rp->siop_lcrc,
746 rp->siop_sien, rp->siop_dien);
747 #ifdef DDB
748 /*Debugger();*/
749 #endif
750 }
751 #endif
752 acb->msgout[0] = MSG_IDENTIFY | lun;
753 if (siop_allow_disc[target] & 2 ||
754 (siop_allow_disc[target] && len == 0))
755 acb->msgout[0] = MSG_IDENTIFY_DR | lun;
756 acb->status = 0;
757 acb->stat[0] = -1;
758 acb->msg[0] = -1;
759 acb->ds.scsi_addr = (0x10000 << target) | (sc->sc_sync[target].sxfer << 8);
760 acb->ds.idlen = 1;
761 acb->ds.idbuf = (char *) kvtop(&acb->msgout[0]);
762 acb->ds.cmdlen = clen;
763 acb->ds.cmdbuf = (char *) kvtop(cbuf);
764 acb->ds.stslen = 1;
765 acb->ds.stsbuf = (char *) kvtop(&acb->stat[0]);
766 acb->ds.msglen = 1;
767 acb->ds.msgbuf = (char *) kvtop(&acb->msg[0]);
768 acb->msg[1] = -1;
769 acb->ds.msginlen = 1;
770 acb->ds.extmsglen = 1;
771 acb->ds.synmsglen = 3;
772 acb->ds.msginbuf = (char *) kvtop(&acb->msg[1]);
773 acb->ds.extmsgbuf = (char *) kvtop(&acb->msg[2]);
774 acb->ds.synmsgbuf = (char *) kvtop(&acb->msg[3]);
775 memset(&acb->ds.chain, 0, sizeof (acb->ds.chain));
776
777 /*
778 * Negotiate wide is the initial negotiation state; since the 53c710
779 * doesn't do wide transfers, just begin the synchronous transfer
780 * negotation here.
781 */
782 if (sc->sc_sync[target].state == NEG_WIDE) {
783 if (siop_inhibit_sync[target]) {
784 sc->sc_sync[target].state = NEG_DONE;
785 sc->sc_sync[target].sbcl = 0;
786 sc->sc_sync[target].sxfer = 0;
787 #ifdef DEBUG
788 if (siopsync_debug)
789 printf ("Forcing target %d asynchronous\n", target);
790 #endif
791 }
792 else {
793 acb->msg[2] = -1;
794 acb->msgout[1] = MSG_EXT_MESSAGE;
795 acb->msgout[2] = 3;
796 acb->msgout[3] = MSG_SYNC_REQ;
797 #ifdef MAXTOR_SYNC_KLUDGE
798 acb->msgout[4] = 50 / 4; /* ask for ridiculous period */
799 #else
800 acb->msgout[4] = sc->sc_minsync;
801 #endif
802 acb->msgout[5] = SIOP_MAX_OFFSET;
803 acb->ds.idlen = 6;
804 sc->sc_sync[target].state = NEG_WAITS;
805 #ifdef DEBUG
806 if (siopsync_debug)
807 printf ("Sending sync request to target %d\n", target);
808 #endif
809 }
810 }
811
812 /*
813 * Build physical DMA addresses for scatter/gather I/O
814 */
815 acb->iob_buf = buf;
816 acb->iob_len = len;
817 acb->iob_curbuf = acb->iob_curlen = 0;
818 nchain = 0;
819 count = len;
820 addr = buf;
821 dmaend = NULL;
822 while (count > 0) {
823 acb->ds.chain[nchain].databuf = (char *) kvtop (addr);
824 if (count < (tcount = PAGE_SIZE - ((int) addr & PGOFSET)))
825 tcount = count;
826 acb->ds.chain[nchain].datalen = tcount;
827 addr += tcount;
828 count -= tcount;
829 if (acb->ds.chain[nchain].databuf == dmaend) {
830 dmaend += acb->ds.chain[nchain].datalen;
831 acb->ds.chain[nchain].datalen = 0;
832 acb->ds.chain[--nchain].datalen += tcount;
833 #ifdef DEBUG
834 ++siopdma_hits;
835 #endif
836 }
837 else {
838 dmaend = acb->ds.chain[nchain].databuf +
839 acb->ds.chain[nchain].datalen;
840 acb->ds.chain[nchain].datalen = tcount;
841 #ifdef DEBUG
842 if (nchain) /* Don't count miss on first one */
843 ++siopdma_misses;
844 #endif
845 }
846 ++nchain;
847 }
848 #ifdef DEBUG
849 if (nchain != 1 && len != 0 && siop_debug & 3) {
850 printf ("DMA chaining set: %d\n", nchain);
851 for (i = 0; i < nchain; ++i) {
852 printf (" [%d] %8p %lx\n", i, acb->ds.chain[i].databuf,
853 acb->ds.chain[i].datalen);
854 }
855 }
856 #endif
857
858 /* push data cache for all data the 53c710 needs to access */
859 dma_cachectl ((void *)acb, sizeof (struct siop_acb));
860 dma_cachectl (cbuf, clen);
861 if (buf != NULL && len != 0)
862 dma_cachectl (buf, len);
863 #ifdef DEBUG
864 if (siop_debug & 0x100 && rp->siop_sbcl & SIOP_BSY) {
865 printf ("ACK! siop was busy at start: rp %p script %p dsa %p active %ld\n",
866 rp, &scripts, &acb->ds, sc->sc_active);
867 #ifdef DDB
868 /*Debugger();*/
869 #endif
870 }
871 #endif
872 if (sc->nexus_list.tqh_first == NULL) {
873 callout_reset(&acb->xs->xs_callout,
874 mstohz(acb->xs->timeout) + 1, siop_timeout, acb);
875 if (rp->siop_istat & SIOP_ISTAT_CON)
876 printf("%s: siop_select while connected?\n",
877 sc->sc_dev.dv_xname);
878 rp->siop_temp = 0;
879 rp->siop_sbcl = sc->sc_sync[target].sbcl;
880 rp->siop_dsa = kvtop((void *)&acb->ds);
881 rp->siop_dsp = sc->sc_scriptspa;
882 SIOP_TRACE('s',1,0,0)
883 } else {
884 if ((rp->siop_istat & SIOP_ISTAT_CON) == 0) {
885 rp->siop_istat = SIOP_ISTAT_SIGP;
886 SIOP_TRACE('s',2,0,0);
887 }
888 else {
889 SIOP_TRACE('s',3,rp->siop_istat,0);
890 }
891 }
892 #ifdef DEBUG
893 ++siopstarts;
894 #endif
895 }
896
897 /*
898 * Process a DMA or SCSI interrupt from the 53C710 SIOP
899 */
900
901 int
902 siop_checkintr(struct siop_softc *sc, u_char istat, u_char dstat,
903 u_char sstat0, int *status)
904 {
905 siop_regmap_p rp = sc->sc_siopp;
906 struct siop_acb *acb = sc->sc_nexus;
907 int target = 0;
908 int dfifo, dbc, sstat1;
909
910 dfifo = rp->siop_dfifo;
911 dbc = rp->siop_dbc0;
912 sstat1 = rp->siop_sstat1;
913 rp->siop_ctest8 |= SIOP_CTEST8_CLF;
914 while ((rp->siop_ctest1 & SIOP_CTEST1_FMT) != SIOP_CTEST1_FMT)
915 ;
916 rp->siop_ctest8 &= ~SIOP_CTEST8_CLF;
917 #ifdef DEBUG
918 ++siopints;
919 #if 0
920 if (siop_debug & 0x100) {
921 DCIAS(&acb->stat[0]); /* XXX */
922 printf ("siopchkintr: istat %x dstat %x sstat0 %x dsps %x sbcl %x sts %x msg %x\n",
923 istat, dstat, sstat0, rp->siop_dsps, rp->siop_sbcl, acb->stat[0], acb->msg[0]);
924 printf ("sync msg in: %02x %02x %02x %02x %02x %02x\n",
925 acb->msg[0], acb->msg[1], acb->msg[2],
926 acb->msg[3], acb->msg[4], acb->msg[5]);
927 }
928 #endif
929 if (rp->siop_dsp && (rp->siop_dsp < sc->sc_scriptspa ||
930 rp->siop_dsp >= sc->sc_scriptspa + sizeof(scripts))) {
931 printf ("%s: dsp not within script dsp %lx scripts %lx:%lx",
932 sc->sc_dev.dv_xname, rp->siop_dsp, sc->sc_scriptspa,
933 sc->sc_scriptspa + sizeof(scripts));
934 printf(" istat %x dstat %x sstat0 %x\n",
935 istat, dstat, sstat0);
936 #ifdef DDB
937 Debugger();
938 #endif
939 }
940 #endif
941 SIOP_TRACE('i',dstat,istat,(istat&SIOP_ISTAT_DIP)?rp->siop_dsps&0xff:sstat0);
942 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff00) {
943 /* Normal completion status, or check condition */
944 #ifdef DEBUG
945 if (rp->siop_dsa != kvtop((void *)&acb->ds)) {
946 printf ("siop: invalid dsa: %lx %x\n", rp->siop_dsa,
947 (unsigned)kvtop((void *)&acb->ds));
948 panic("*** siop DSA invalid ***");
949 }
950 #endif
951 target = acb->xs->xs_periph->periph_target;
952 if (sc->sc_sync[target].state == NEG_WAITS) {
953 if (acb->msg[1] == 0xff)
954 printf ("%s: target %d ignored sync request\n",
955 sc->sc_dev.dv_xname, target);
956 else if (acb->msg[1] == MSG_REJECT)
957 printf ("%s: target %d rejected sync request\n",
958 sc->sc_dev.dv_xname, target);
959 else
960 /* XXX - need to set sync transfer parameters */
961 printf("%s: target %d (sync) %02x %02x %02x\n",
962 sc->sc_dev.dv_xname, target, acb->msg[1],
963 acb->msg[2], acb->msg[3]);
964 sc->sc_sync[target].state = NEG_DONE;
965 }
966 dma_cachectl(&acb->stat[0], 1);
967 *status = acb->stat[0];
968 #ifdef DEBUG
969 if (rp->siop_sbcl & SIOP_BSY) {
970 /*printf ("ACK! siop was busy at end: rp %x script %x dsa %x\n",
971 rp, &scripts, &acb->ds);*/
972 #ifdef DDB
973 /*Debugger();*/
974 #endif
975 }
976 if (acb->msg[0] != 0x00)
977 printf("%s: message was not COMMAND COMPLETE: %x\n",
978 sc->sc_dev.dv_xname, acb->msg[0]);
979 #endif
980 if (sc->nexus_list.tqh_first)
981 rp->siop_dcntl |= SIOP_DCNTL_STD;
982 return 1;
983 }
984 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff0b) {
985 target = acb->xs->xs_periph->periph_target;
986 if (acb->msg[1] == MSG_EXT_MESSAGE && acb->msg[2] == 3 &&
987 acb->msg[3] == MSG_SYNC_REQ) {
988 #ifdef DEBUG
989 if (siopsync_debug)
990 printf ("sync msg in: %02x %02x %02x %02x %02x %02x\n",
991 acb->msg[0], acb->msg[1], acb->msg[2],
992 acb->msg[3], acb->msg[4], acb->msg[5]);
993 #endif
994 sc->sc_sync[target].sxfer = 0;
995 sc->sc_sync[target].sbcl = 0;
996 if (acb->msg[2] == 3 &&
997 acb->msg[3] == MSG_SYNC_REQ &&
998 acb->msg[5] != 0) {
999 #ifdef MAXTOR_KLUDGE
1000 /*
1001 * Kludge for my Maxtor XT8580S
1002 * It accepts whatever we request, even
1003 * though it won't work. So we ask for
1004 * a short period than we can handle. If
1005 * the device says it can do it, use 208ns.
1006 * If the device says it can do less than
1007 * 100ns, then we limit it to 100ns.
1008 */
1009 if (acb->msg[4] && acb->msg[4] < 100 / 4) {
1010 #ifdef DEBUG
1011 printf ("%d: target %d wanted %dns period\n",
1012 sc->sc_dev.dv_xname, target,
1013 acb->msg[4] * 4);
1014 #endif
1015 if (acb->msg[4] == 50 / 4)
1016 acb->msg[4] = 208 / 4;
1017 else
1018 acb->msg[4] = 100 / 4;
1019 }
1020 #endif /* MAXTOR_KLUDGE */
1021 printf ("%s: target %d now synchronous, period=%dns, offset=%d\n",
1022 sc->sc_dev.dv_xname, target,
1023 acb->msg[4] * 4, acb->msg[5]);
1024 scsi_period_to_siop (sc, target);
1025 }
1026 rp->siop_sxfer = sc->sc_sync[target].sxfer;
1027 rp->siop_sbcl = sc->sc_sync[target].sbcl;
1028 if (sc->sc_sync[target].state == NEG_WAITS) {
1029 sc->sc_sync[target].state = NEG_DONE;
1030 rp->siop_dsp = sc->sc_scriptspa + Ent_clear_ack;
1031 return(0);
1032 }
1033 rp->siop_dcntl |= SIOP_DCNTL_STD;
1034 sc->sc_sync[target].state = NEG_DONE;
1035 return (0);
1036 }
1037 /* XXX - not SDTR message */
1038 }
1039 if (sstat0 & SIOP_SSTAT0_M_A) { /* Phase mismatch */
1040 #ifdef DEBUG
1041 ++siopphmm;
1042 if (acb == NULL)
1043 printf("%s: Phase mismatch with no active command?\n",
1044 sc->sc_dev.dv_xname);
1045 #endif
1046 if (acb->iob_len) {
1047 int adjust;
1048 adjust = ((dfifo - (dbc & 0x7f)) & 0x7f);
1049 if (sstat1 & SIOP_SSTAT1_ORF)
1050 ++adjust;
1051 if (sstat1 & SIOP_SSTAT1_OLF)
1052 ++adjust;
1053 acb->iob_curlen =
1054 *((long *)__UNVOLATILE(&rp->siop_dcmd)) & 0xffffff;
1055 acb->iob_curlen += adjust;
1056 acb->iob_curbuf =
1057 *((long *)__UNVOLATILE(&rp->siop_dnad)) - adjust;
1058 #ifdef DEBUG
1059 if (siop_debug & 0x100) {
1060 int i;
1061 printf ("Phase mismatch: curbuf %lx curlen %lx dfifo %x dbc %x sstat1 %x adjust %x sbcl %x starts %d acb %p\n",
1062 acb->iob_curbuf, acb->iob_curlen, dfifo,
1063 dbc, sstat1, adjust, rp->siop_sbcl,
1064 siopstarts, acb);
1065 if (acb->ds.chain[1].datalen) {
1066 for (i = 0; acb->ds.chain[i].datalen; ++i)
1067 printf("chain[%d] addr %p len %lx\n",
1068 i, acb->ds.chain[i].databuf,
1069 acb->ds.chain[i].datalen);
1070 }
1071 }
1072 #endif
1073 dma_cachectl ((void *)acb, sizeof(*acb));
1074 }
1075 #ifdef DEBUG
1076 SIOP_TRACE('m',rp->siop_sbcl,(rp->siop_dsp>>8),rp->siop_dsp);
1077 if (siop_debug & 9)
1078 printf ("Phase mismatch: %x dsp +%lx dcmd %lx\n",
1079 rp->siop_sbcl,
1080 rp->siop_dsp - sc->sc_scriptspa,
1081 *((volatile long *)&rp->siop_dcmd));
1082 #endif
1083 if ((rp->siop_sbcl & SIOP_REQ) == 0) {
1084 printf ("Phase mismatch: REQ not asserted! %02x dsp %lx\n",
1085 rp->siop_sbcl, rp->siop_dsp);
1086 #if defined(DEBUG) && defined(DDB)
1087 /*Debugger(); XXX is*/
1088 #endif
1089 }
1090 switch (rp->siop_sbcl & 7) {
1091 case 0: /* data out */
1092 case 1: /* data in */
1093 case 2: /* status */
1094 case 3: /* command */
1095 case 6: /* message in */
1096 case 7: /* message out */
1097 rp->siop_dsp = sc->sc_scriptspa + Ent_switch;
1098 break;
1099 default:
1100 goto bad_phase;
1101 }
1102 return 0;
1103 }
1104 if (sstat0 & SIOP_SSTAT0_STO) { /* Select timed out */
1105 #ifdef DEBUG
1106 if (acb == NULL)
1107 printf("%s: Select timeout with no active command?\n",
1108 sc->sc_dev.dv_xname);
1109 if (rp->siop_sbcl & SIOP_BSY) {
1110 printf ("ACK! siop was busy at timeout: rp %p script %p dsa %p\n",
1111 rp, &scripts, &acb->ds);
1112 printf(" sbcl %x sdid %x istat %x dstat %x sstat0 %x\n",
1113 rp->siop_sbcl, rp->siop_sdid, istat, dstat, sstat0);
1114 if (!(rp->siop_sbcl & SIOP_BSY)) {
1115 printf ("Yikes, it's not busy now!\n");
1116 #if 0
1117 *status = -1;
1118 if (sc->nexus_list.tqh_first)
1119 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect;
1120 return 1;
1121 #endif
1122 }
1123 /* rp->siop_dcntl |= SIOP_DCNTL_STD;*/
1124 return (0);
1125 #ifdef DDB
1126 Debugger();
1127 #endif
1128 }
1129 #endif
1130 *status = -1;
1131 acb->xs->error = XS_SELTIMEOUT;
1132 if (sc->nexus_list.tqh_first)
1133 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect;
1134 return 1;
1135 }
1136 if (acb)
1137 target = acb->xs->xs_periph->periph_target;
1138 else
1139 target = 7;
1140 if (sstat0 & SIOP_SSTAT0_UDC) {
1141 #ifdef DEBUG
1142 if (acb == NULL)
1143 printf("%s: Unexpected disconnect with no active command?\n",
1144 sc->sc_dev.dv_xname);
1145 printf ("%s: target %d disconnected unexpectedly\n",
1146 sc->sc_dev.dv_xname, target);
1147 #endif
1148 #if 0
1149 siopabort (sc, rp, "siopchkintr");
1150 #endif
1151 *status = STS_BUSY;
1152 if (sc->nexus_list.tqh_first)
1153 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect;
1154 return (acb != NULL);
1155 }
1156 if (dstat & SIOP_DSTAT_SIR && (rp->siop_dsps == 0xff01 ||
1157 rp->siop_dsps == 0xff02)) {
1158 #ifdef DEBUG
1159 if (siop_debug & 0x100)
1160 printf ("%s: ID %02x disconnected TEMP %lx (+%lx) curbuf %lx curlen %lx buf %p len %lx dfifo %x dbc %x sstat1 %x starts %d acb %p\n",
1161 sc->sc_dev.dv_xname, 1 << target, rp->siop_temp,
1162 rp->siop_temp ? rp->siop_temp - sc->sc_scriptspa : 0,
1163 acb->iob_curbuf, acb->iob_curlen,
1164 acb->ds.chain[0].databuf, acb->ds.chain[0].datalen, dfifo, dbc, sstat1, siopstarts, acb);
1165 #endif
1166 if (acb == NULL) {
1167 printf("%s: Disconnect with no active command?\n",
1168 sc->sc_dev.dv_xname);
1169 return (0);
1170 }
1171 /*
1172 * XXXX need to update iob_curbuf/iob_curlen to reflect
1173 * current data transferred. If device disconnected in
1174 * the middle of a DMA block, they should already be set
1175 * by the phase change interrupt. If the disconnect
1176 * occurs on a DMA block boundary, we have to figure out
1177 * which DMA block it was.
1178 */
1179 if (acb->iob_len && rp->siop_temp) {
1180 int n = rp->siop_temp - sc->sc_scriptspa;
1181
1182 if (acb->iob_curlen && acb->iob_curlen != acb->ds.chain[0].datalen)
1183 printf("%s: iob_curbuf/len already set? n %x iob %lx/%lx chain[0] %p/%lx\n",
1184 sc->sc_dev.dv_xname, n, acb->iob_curbuf, acb->iob_curlen,
1185 acb->ds.chain[0].databuf, acb->ds.chain[0].datalen);
1186 if (n < Ent_datain)
1187 n = (n - Ent_dataout) / 16;
1188 else
1189 n = (n - Ent_datain) / 16;
1190 if (n <= 0 && n > DMAMAXIO)
1191 printf("TEMP invalid %d\n", n);
1192 else {
1193 acb->iob_curbuf = (u_long)acb->ds.chain[n].databuf;
1194 acb->iob_curlen = acb->ds.chain[n].datalen;
1195 }
1196 #ifdef DEBUG
1197 if (siop_debug & 0x100) {
1198 printf("%s: TEMP offset %d", sc->sc_dev.dv_xname, n);
1199 printf(" curbuf %lx curlen %lx\n", acb->iob_curbuf,
1200 acb->iob_curlen);
1201 }
1202 #endif
1203 }
1204 /*
1205 * If data transfer was interrupted by disconnect, iob_curbuf
1206 * and iob_curlen should reflect the point of interruption.
1207 * Adjust the DMA chain so that the data transfer begins
1208 * at the appropriate place upon reselection.
1209 * XXX This should only be done on save data pointer message?
1210 */
1211 if (acb->iob_curlen) {
1212 int i, j;
1213
1214 #ifdef DEBUG
1215 if (siop_debug & 0x100)
1216 printf ("%s: adjusting DMA chain\n",
1217 sc->sc_dev.dv_xname);
1218 if (rp->siop_dsps == 0xff02)
1219 printf ("%s: ID %02x disconnected without Save Data Pointers\n",
1220 sc->sc_dev.dv_xname, 1 << target);
1221 #endif
1222 /* XXX is: if (rp->siop_dsps != 0xff02) { */
1223 /* not disconnected without save data ptr */
1224 for (i = 0; i < DMAMAXIO; ++i) {
1225 if (acb->ds.chain[i].datalen == 0)
1226 break;
1227 if (acb->iob_curbuf >= (long)acb->ds.chain[i].databuf &&
1228 acb->iob_curbuf < (long)(acb->ds.chain[i].databuf +
1229 acb->ds.chain[i].datalen))
1230 break;
1231 }
1232 if (i >= DMAMAXIO || acb->ds.chain[i].datalen == 0) {
1233 printf("couldn't find saved data pointer: ");
1234 printf("curbuf %lx curlen %lx i %d\n",
1235 acb->iob_curbuf, acb->iob_curlen, i);
1236 #ifdef DDB
1237 Debugger();
1238 #endif
1239 }
1240 /* XXX is: } */
1241 #ifdef DEBUG
1242 if (siop_debug & 0x100)
1243 printf(" chain[0]: %p/%lx -> %lx/%lx\n",
1244 acb->ds.chain[0].databuf,
1245 acb->ds.chain[0].datalen,
1246 acb->iob_curbuf,
1247 acb->iob_curlen);
1248 #endif
1249 acb->ds.chain[0].databuf = (char *)acb->iob_curbuf;
1250 acb->ds.chain[0].datalen = acb->iob_curlen;
1251 for (j = 1, ++i; i < DMAMAXIO && acb->ds.chain[i].datalen; ++i, ++j) {
1252 #ifdef DEBUG
1253 if (siop_debug & 0x100)
1254 printf(" chain[%d]: %p/%lx -> %p/%lx\n", j,
1255 acb->ds.chain[j].databuf,
1256 acb->ds.chain[j].datalen,
1257 acb->ds.chain[i].databuf,
1258 acb->ds.chain[i].datalen);
1259 #endif
1260 acb->ds.chain[j].databuf = acb->ds.chain[i].databuf;
1261 acb->ds.chain[j].datalen = acb->ds.chain[i].datalen;
1262 }
1263 if (j < DMAMAXIO)
1264 acb->ds.chain[j].datalen = 0;
1265 DCIAS(kvtop((void *)&acb->ds.chain));
1266 }
1267 ++sc->sc_tinfo[target].dconns;
1268 /*
1269 * add nexus to waiting list
1270 * clear nexus
1271 * try to start another command for another target/lun
1272 */
1273 acb->status = sc->sc_flags & SIOP_INTSOFF;
1274 TAILQ_INSERT_HEAD(&sc->nexus_list, acb, chain);
1275 sc->sc_nexus = NULL; /* no current device */
1276 /* start script to wait for reselect */
1277 if (sc->sc_nexus == NULL)
1278 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect;
1279 /* XXXX start another command ? */
1280 if (sc->ready_list.tqh_first)
1281 siop_sched(sc);
1282 return (0);
1283 }
1284 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff03) {
1285 int reselid = rp->siop_scratch & 0x7f;
1286 int reselun = rp->siop_sfbr & 0x07;
1287
1288 sc->sc_sstat1 = rp->siop_sbcl; /* XXXX save current SBCL */
1289 #ifdef DEBUG
1290 if (siop_debug & 0x100)
1291 printf ("%s: target ID %02x reselected dsps %lx\n",
1292 sc->sc_dev.dv_xname, reselid,
1293 rp->siop_dsps);
1294 if ((rp->siop_sfbr & 0x80) == 0)
1295 printf("%s: Reselect message in was not identify: %x\n",
1296 sc->sc_dev.dv_xname, rp->siop_sfbr);
1297 #endif
1298 if (sc->sc_nexus) {
1299 #ifdef DEBUG
1300 if (siop_debug & 0x100)
1301 printf ("%s: reselect ID %02x w/active\n",
1302 sc->sc_dev.dv_xname, reselid);
1303 #endif
1304 TAILQ_INSERT_HEAD(&sc->ready_list, sc->sc_nexus, chain);
1305 sc->sc_tinfo[sc->sc_nexus->xs->xs_periph->periph_target].lubusy
1306 &= ~(1 << sc->sc_nexus->xs->xs_periph->periph_lun);
1307 --sc->sc_active;
1308 }
1309 /*
1310 * locate acb of reselecting device
1311 * set sc->sc_nexus to acb
1312 */
1313 for (acb = sc->nexus_list.tqh_first; acb;
1314 acb = acb->chain.tqe_next) {
1315 if (reselid != (acb->ds.scsi_addr >> 16) ||
1316 reselun != (acb->msgout[0] & 0x07))
1317 continue;
1318 TAILQ_REMOVE(&sc->nexus_list, acb, chain);
1319 sc->sc_nexus = acb;
1320 sc->sc_flags |= acb->status;
1321 acb->status = 0;
1322 DCIAS(kvtop(&acb->stat[0]));
1323 rp->siop_dsa = kvtop((void *)&acb->ds);
1324 rp->siop_sxfer =
1325 sc->sc_sync[acb->xs->xs_periph->periph_target].sxfer;
1326 rp->siop_sbcl =
1327 sc->sc_sync[acb->xs->xs_periph->periph_target].sbcl;
1328 break;
1329 }
1330 if (acb == NULL) {
1331 printf("%s: target ID %02x reselect nexus_list %p\n",
1332 sc->sc_dev.dv_xname, reselid,
1333 sc->nexus_list.tqh_first);
1334 panic("unable to find reselecting device");
1335 }
1336 dma_cachectl ((void *)acb, sizeof(*acb));
1337 rp->siop_temp = 0;
1338 rp->siop_dcntl |= SIOP_DCNTL_STD;
1339 return (0);
1340 }
1341 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff04) {
1342 #ifdef DEBUG
1343 u_short ctest2 = rp->siop_ctest2;
1344
1345 /* reselect was interrupted (by Sig_P or select) */
1346 if (siop_debug & 0x100 ||
1347 (ctest2 & SIOP_CTEST2_SIGP) == 0)
1348 printf ("%s: reselect interrupted (Sig_P?) scntl1 %x ctest2 %x sfbr %x istat %x/%x\n",
1349 sc->sc_dev.dv_xname, rp->siop_scntl1,
1350 ctest2, rp->siop_sfbr, istat, rp->siop_istat);
1351 #endif
1352 /* XXX assumes it was not select */
1353 if (sc->sc_nexus == NULL) {
1354 #ifdef DEBUG
1355 printf("%s: reselect interrupted, sc_nexus == NULL\n",
1356 sc->sc_dev.dv_xname);
1357 #if 0
1358 siop_dump(sc);
1359 #ifdef DDB
1360 Debugger();
1361 #endif
1362 #endif
1363 #endif
1364 rp->siop_dcntl |= SIOP_DCNTL_STD;
1365 return(0);
1366 }
1367 target = sc->sc_nexus->xs->xs_periph->periph_target;
1368 rp->siop_temp = 0;
1369 rp->siop_dsa = kvtop((void *)&sc->sc_nexus->ds);
1370 rp->siop_sxfer = sc->sc_sync[target].sxfer;
1371 rp->siop_sbcl = sc->sc_sync[target].sbcl;
1372 rp->siop_dsp = sc->sc_scriptspa;
1373 return (0);
1374 }
1375 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff06) {
1376 if (acb == NULL)
1377 printf("%s: Bad message-in with no active command?\n",
1378 sc->sc_dev.dv_xname);
1379 /* Unrecognized message in byte */
1380 dma_cachectl (&acb->msg[1],1);
1381 printf ("%s: Unrecognized message in data sfbr %x msg %x sbcl %x\n",
1382 sc->sc_dev.dv_xname, rp->siop_sfbr, acb->msg[1], rp->siop_sbcl);
1383 /* what should be done here? */
1384 DCIAS(kvtop(&acb->msg[1]));
1385 rp->siop_dsp = sc->sc_scriptspa + Ent_clear_ack;
1386 return (0);
1387 }
1388 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff0a) {
1389 /* Status phase wasn't followed by message in phase? */
1390 printf ("%s: Status phase not followed by message in phase? sbcl %x sbdl %x\n",
1391 sc->sc_dev.dv_xname, rp->siop_sbcl, rp->siop_sbdl);
1392 if (rp->siop_sbcl == 0xa7) {
1393 /* It is now, just continue the script? */
1394 rp->siop_dcntl |= SIOP_DCNTL_STD;
1395 return (0);
1396 }
1397 }
1398 if (sstat0 == 0 && dstat & SIOP_DSTAT_SIR) {
1399 dma_cachectl (&acb->stat[0], 1);
1400 dma_cachectl (&acb->msg[0], 1);
1401 printf ("SIOP interrupt: %lx sts %x msg %x %x sbcl %x\n",
1402 rp->siop_dsps, acb->stat[0], acb->msg[0], acb->msg[1],
1403 rp->siop_sbcl);
1404 siopreset (sc);
1405 *status = -1;
1406 return 0; /* siopreset has cleaned up */
1407 }
1408 if (sstat0 & SIOP_SSTAT0_SGE)
1409 printf ("SIOP: SCSI Gross Error\n");
1410 if (sstat0 & SIOP_SSTAT0_PAR)
1411 printf ("SIOP: Parity Error\n");
1412 if (dstat & SIOP_DSTAT_IID)
1413 printf ("SIOP: Invalid instruction detected\n");
1414 bad_phase:
1415 /*
1416 * temporary panic for unhandled conditions
1417 * displays various things about the 53C710 status and registers
1418 * then panics.
1419 * XXXX need to clean this up to print out the info, reset, and continue
1420 */
1421 printf ("siopchkintr: target %x ds %p\n", target, &acb->ds);
1422 printf ("scripts %lx ds %x rp %x dsp %lx dcmd %lx\n",
1423 sc->sc_scriptspa, (unsigned)kvtop((void *)&acb->ds),
1424 (unsigned)kvtop((void *)__UNVOLATILE(rp)), rp->siop_dsp,
1425 *((volatile long *)&rp->siop_dcmd));
1426 printf ("siopchkintr: istat %x dstat %x sstat0 %x dsps %lx dsa %lx sbcl %x sts %x msg %x %x sfbr %x\n",
1427 istat, dstat, sstat0, rp->siop_dsps, rp->siop_dsa,
1428 rp->siop_sbcl, acb->stat[0], acb->msg[0], acb->msg[1], rp->siop_sfbr);
1429 #ifdef DEBUG
1430 if (siop_debug & 0x20)
1431 panic("siopchkintr: **** temp ****");
1432 #endif
1433 #ifdef DDB
1434 Debugger ();
1435 #endif
1436 siopreset (sc); /* hard reset */
1437 *status = -1;
1438 return 0; /* siopreset cleaned up */
1439 }
1440
1441 void
1442 siop_select(struct siop_softc *sc)
1443 {
1444 siop_regmap_p rp;
1445 struct siop_acb *acb = sc->sc_nexus;
1446
1447 #ifdef DEBUG
1448 if (siop_debug & 1)
1449 printf ("%s: select ", sc->sc_dev.dv_xname);
1450 #endif
1451
1452 rp = sc->sc_siopp;
1453 if (acb->xs->xs_control & XS_CTL_POLL || siop_no_dma) {
1454 sc->sc_flags |= SIOP_INTSOFF;
1455 sc->sc_flags &= ~SIOP_INTDEFER;
1456 if ((rp->siop_istat & 0x08) == 0) {
1457 rp->siop_sien = 0;
1458 rp->siop_dien = 0;
1459 }
1460 #if 0
1461 } else if ((sc->sc_flags & SIOP_INTDEFER) == 0) {
1462 sc->sc_flags &= ~SIOP_INTSOFF;
1463 if ((rp->siop_istat & 0x08) == 0) {
1464 rp->siop_sien = sc->sc_sien;
1465 rp->siop_dien = sc->sc_dien;
1466 }
1467 #endif
1468 }
1469 #ifdef DEBUG
1470 if (siop_debug & 1)
1471 printf ("siop_select: target %x cmd %02x ds %p\n",
1472 acb->xs->xs_periph->periph_target, acb->cmd.opcode,
1473 &sc->sc_nexus->ds);
1474 #endif
1475
1476 siop_start(sc, acb->xs->xs_periph->periph_target,
1477 acb->xs->xs_periph->periph_lun,
1478 (u_char *)&acb->cmd, acb->clen, acb->daddr, acb->dleft);
1479
1480 return;
1481 }
1482
1483 /*
1484 * 53C710 interrupt handler
1485 */
1486
1487 void
1488 siopintr(register struct siop_softc *sc)
1489 {
1490 siop_regmap_p rp;
1491 register u_char istat, dstat, sstat0;
1492 int status;
1493 int s = splbio();
1494
1495 istat = sc->sc_istat;
1496 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) {
1497 splx(s);
1498 return;
1499 }
1500
1501 /* Got a valid interrupt on this device */
1502 rp = sc->sc_siopp;
1503 dstat = sc->sc_dstat;
1504 sstat0 = sc->sc_sstat0;
1505 if (dstat & SIOP_DSTAT_SIR)
1506 sc->sc_intcode = rp->siop_dsps;
1507 sc->sc_istat = 0;
1508 #ifdef DEBUG
1509 if (siop_debug & 1)
1510 printf ("%s: intr istat %x dstat %x sstat0 %x\n",
1511 sc->sc_dev.dv_xname, istat, dstat, sstat0);
1512 if (!sc->sc_active) {
1513 printf ("%s: spurious interrupt? istat %x dstat %x sstat0 %x nexus %p status %x\n",
1514 sc->sc_dev.dv_xname, istat, dstat, sstat0,
1515 sc->sc_nexus, sc->sc_nexus ? sc->sc_nexus->stat[0] : 0);
1516 }
1517 #endif
1518
1519 #ifdef DEBUG
1520 if (siop_debug & 5) {
1521 DCIAS(kvtop(&sc->sc_nexus->stat[0]));
1522 printf ("%s: intr istat %x dstat %x sstat0 %x dsps %lx sbcl %x sts %x msg %x\n",
1523 sc->sc_dev.dv_xname, istat, dstat, sstat0,
1524 rp->siop_dsps, rp->siop_sbcl,
1525 sc->sc_nexus->stat[0], sc->sc_nexus->msg[0]);
1526 }
1527 #endif
1528 if (sc->sc_flags & SIOP_INTDEFER) {
1529 sc->sc_flags &= ~(SIOP_INTDEFER | SIOP_INTSOFF);
1530 rp->siop_sien = sc->sc_sien;
1531 rp->siop_dien = sc->sc_dien;
1532 }
1533 if (siop_checkintr (sc, istat, dstat, sstat0, &status)) {
1534 #if 1
1535 if (status == 0xff)
1536 printf ("siopintr: status == 0xff\n");
1537 #endif
1538 if ((sc->sc_flags & (SIOP_INTSOFF | SIOP_INTDEFER)) != SIOP_INTSOFF) {
1539 #if 0
1540 if (rp->siop_sbcl & SIOP_BSY) {
1541 printf ("%s: SCSI bus busy at completion",
1542 sc->sc_dev.dv_xname);
1543 printf(" targ %d sbcl %02x sfbr %x lcrc %02x dsp +%x\n",
1544 sc->sc_nexus->xs->xs_periph->periph_target,
1545 rp->siop_sbcl, rp->siop_sfbr, rp->siop_lcrc,
1546 rp->siop_dsp - sc->sc_scriptspa);
1547 }
1548 #endif
1549 siop_scsidone(sc->sc_nexus, sc->sc_nexus ?
1550 sc->sc_nexus->stat[0] : -1);
1551 }
1552 }
1553 splx(s);
1554 }
1555
1556 /*
1557 * This is based on the Progressive Peripherals 33Mhz Zeus driver and will
1558 * not be correct for other 53c710 boards.
1559 *
1560 */
1561 void
1562 scsi_period_to_siop(struct siop_softc *sc, int target)
1563 {
1564 int period, offset, sxfer, sbcl = 0;
1565 #ifdef DEBUG_SYNC
1566 int i;
1567 #endif
1568
1569 period = sc->sc_nexus->msg[4];
1570 offset = sc->sc_nexus->msg[5];
1571 #ifdef DEBUG_SYNC
1572 sxfer = 0;
1573 if (offset <= SIOP_MAX_OFFSET)
1574 sxfer = offset;
1575 for (i = 0; i < sizeof (sync_tab) / 2; ++i) {
1576 if (period <= sync_tab[i].p) {
1577 sxfer |= sync_tab[i].r & 0x70;
1578 sbcl = sync_tab[i].r & 0x03;
1579 break;
1580 }
1581 }
1582 printf ("siop sync old: siop_sxfr %02x, siop_sbcl %02x\n", sxfer, sbcl);
1583 #endif
1584 for (sbcl = 1; sbcl < 4; ++sbcl) {
1585 sxfer = (period * 4 - 1) / sc->sc_tcp[sbcl] - 3;
1586 if (sxfer >= 0 && sxfer <= 7)
1587 break;
1588 }
1589 if (sbcl > 3) {
1590 printf("siop sync: unable to compute sync params for period %dns\n",
1591 period * 4);
1592 /*
1593 * XXX need to pick a value we can do and renegotiate
1594 */
1595 sxfer = sbcl = 0;
1596 } else {
1597 sxfer = (sxfer << 4) | ((offset <= SIOP_MAX_OFFSET) ?
1598 offset : SIOP_MAX_OFFSET);
1599 #ifdef DEBUG_SYNC
1600 printf("siop sync: params for period %dns: sxfer %x sbcl %x",
1601 period * 4, sxfer, sbcl);
1602 printf(" actual period %dns\n",
1603 sc->sc_tcp[sbcl] * ((sxfer >> 4) + 4));
1604 #endif
1605 }
1606 sc->sc_sync[target].sxfer = sxfer;
1607 sc->sc_sync[target].sbcl = sbcl;
1608 #ifdef DEBUG_SYNC
1609 printf ("siop sync: siop_sxfr %02x, siop_sbcl %02x\n", sxfer, sbcl);
1610 #endif
1611 }
1612
1613 #ifdef DEBUG
1614
1615 #if SIOP_TRACE_SIZE
1616 void
1617 siop_dump_trace(void)
1618 {
1619 int i;
1620
1621 printf("siop trace: next index %d\n", siop_trix);
1622 i = siop_trix;
1623 do {
1624 printf("%3d: '%c' %02x %02x %02x\n", i, siop_trbuf[i],
1625 siop_trbuf[i + 1], siop_trbuf[i + 2], siop_trbuf[i + 3]);
1626 i = (i + 4) & (SIOP_TRACE_SIZE - 1);
1627 } while (i != siop_trix);
1628 }
1629 #endif
1630
1631 void
1632 siop_dump_acb(struct siop_acb *acb)
1633 {
1634 u_char *b = (u_char *) &acb->cmd;
1635 int i;
1636
1637 printf("acb@%p ", acb);
1638 if (acb->xs == NULL) {
1639 printf("<unused>\n");
1640 return;
1641 }
1642 printf("(%d:%d) flags %2x clen %2d cmd ",
1643 acb->xs->xs_periph->periph_target,
1644 acb->xs->xs_periph->periph_lun, acb->flags, acb->clen);
1645 for (i = acb->clen; i; --i)
1646 printf(" %02x", *b++);
1647 printf("\n");
1648 printf(" xs: %p data %p:%04x ", acb->xs, acb->xs->data,
1649 acb->xs->datalen);
1650 printf("va %p:%lx ", acb->iob_buf, acb->iob_len);
1651 printf("cur %lx:%lx\n", acb->iob_curbuf, acb->iob_curlen);
1652 }
1653
1654 void
1655 siop_dump(struct siop_softc *sc)
1656 {
1657 struct siop_acb *acb;
1658 siop_regmap_p rp = sc->sc_siopp;
1659 int s;
1660 int i;
1661
1662 s = splbio();
1663 #if SIOP_TRACE_SIZE
1664 siop_dump_trace();
1665 #endif
1666 printf("%s@%p regs %p istat %x\n",
1667 sc->sc_dev.dv_xname, sc, rp, rp->siop_istat);
1668 if ((acb = sc->free_list.tqh_first) > 0) {
1669 printf("Free list:\n");
1670 while (acb) {
1671 siop_dump_acb(acb);
1672 acb = acb->chain.tqe_next;
1673 }
1674 }
1675 if ((acb = sc->ready_list.tqh_first) > 0) {
1676 printf("Ready list:\n");
1677 while (acb) {
1678 siop_dump_acb(acb);
1679 acb = acb->chain.tqe_next;
1680 }
1681 }
1682 if ((acb = sc->nexus_list.tqh_first) > 0) {
1683 printf("Nexus list:\n");
1684 while (acb) {
1685 siop_dump_acb(acb);
1686 acb = acb->chain.tqe_next;
1687 }
1688 }
1689 if (sc->sc_nexus) {
1690 printf("Nexus:\n");
1691 siop_dump_acb(sc->sc_nexus);
1692 }
1693 for (i = 0; i < 8; ++i) {
1694 if (sc->sc_tinfo[i].cmds > 2) {
1695 printf("tgt %d: cmds %d disc %d lubusy %x\n",
1696 i, sc->sc_tinfo[i].cmds,
1697 sc->sc_tinfo[i].dconns,
1698 sc->sc_tinfo[i].lubusy);
1699 }
1700 }
1701 splx(s);
1702 }
1703 #endif
NetBSD on the FriendlyARM MINI2440