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1.1 nbrk 1: /* $OpenBSD: ssh.c,v 1.16 2007/05/29 13:56:13 pyr Exp $ */
2:
3: /*
4: * Copyright (c) 1994 Michael L. Hitch
5: * Copyright (c) 1990 The Regents of the University of California.
6: * All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * Van Jacobson of Lawrence Berkeley Laboratory.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: *
35: * @(#)ssh.c 7.5 (Berkeley) 5/4/91
36: */
37:
38: /*
39: * 53C710 scsi adaptor driver
40: */
41:
42: #include <sys/param.h>
43: #include <sys/systm.h>
44: #include <sys/device.h>
45: #include <sys/disklabel.h>
46: #include <sys/dkstat.h>
47: #include <sys/buf.h>
48: #include <sys/malloc.h>
49: #include <sys/queue.h>
50:
51: #include <scsi/scsi_all.h>
52: #include <scsi/scsiconf.h>
53:
54: #include <machine/autoconf.h>
55: #include <machine/cpu.h>
56:
57: #include <mvme68k/dev/sshreg.h>
58: #include <mvme68k/dev/sshvar.h>
59:
60: /*
61: * SCSI delays
62: * In u-seconds, primarily for state changes on the SPC.
63: */
64: #define SCSI_CMD_WAIT 500000 /* wait per step of 'immediate' cmds */
65: #define SCSI_DATA_WAIT 500000 /* wait per data in/out step */
66: #define SCSI_INIT_WAIT 500000 /* wait per step (both) during init */
67:
68: void ssh_select(struct ssh_softc *);
69: void sshabort(struct ssh_softc *, ssh_regmap_p, char *);
70: void ssherror(struct ssh_softc *, ssh_regmap_p, u_char);
71: void sshstart(struct ssh_softc *);
72: void sshreset(struct ssh_softc *);
73: void sshsetdelay(int);
74: void ssh_scsidone(struct ssh_acb *, int);
75: void ssh_sched(struct ssh_softc *);
76: int ssh_poll(struct ssh_softc *, struct ssh_acb *);
77: void sshintr(struct ssh_softc *);
78: void sshinitialize(struct ssh_softc *);
79: void ssh_start(struct ssh_softc *, int, int, u_char *, int, u_char *, int);
80: int ssh_checkintr(struct ssh_softc *, u_char, u_char, u_char, int *);
81: void scsi_period_to_ssh(struct ssh_softc *, int);
82:
83: /* 53C710 script */
84: const
85: #include <mvme68k/dev/ssh_script.out>
86:
87: /* default to not inhibit sync negotiation on any drive */
88: u_char ssh_inhibit_sync[8] = { 0, 0, 0, 0, 0, 0, 0}; /* initialize, so patchable */
89: u_char ssh_allow_disc[8] = { 3, 3, 3, 3, 3, 3, 3, 3};
90: int ssh_no_dma = 0;
91:
92: int ssh_reset_delay = 250; /* delay after reset, in milleseconds */
93:
94: int ssh_cmd_wait = SCSI_CMD_WAIT;
95: int ssh_data_wait = SCSI_DATA_WAIT;
96: int ssh_init_wait = SCSI_INIT_WAIT;
97:
98: #ifdef DEBUG
99: /*
100: * 0x01 - full debug
101: * 0x02 - DMA chaining
102: * 0x04 - sshintr
103: * 0x08 - phase mismatch
104: * 0x10 - <not used>
105: * 0x20 - panic on unhandled exceptions
106: * 0x100 - disconnect/reselect
107: */
108: int ssh_debug = 0;
109: int sshsync_debug = 0;
110: int sshdma_hits = 0;
111: int sshdma_misses = 0;
112: int sshchain_ints = 0;
113: int sshstarts = 0;
114: int sshints = 0;
115: int sshphmm = 0;
116: #define SSH_TRACE_SIZE 128
117: #define SSH_TRACE(a,b,c,d) \
118: ssh_trbuf[ssh_trix] = (a); \
119: ssh_trbuf[ssh_trix+1] = (b); \
120: ssh_trbuf[ssh_trix+2] = (c); \
121: ssh_trbuf[ssh_trix+3] = (d); \
122: ssh_trix = (ssh_trix + 4) & (SSH_TRACE_SIZE - 1);
123: u_char ssh_trbuf[SSH_TRACE_SIZE];
124: int ssh_trix;
125: #else
126: #define SSH_TRACE(a,b,c,d)
127: #endif
128:
129:
130: /*
131: * default minphys routine for ssh based controllers
132: */
133: void
134: ssh_minphys(bp)
135: struct buf *bp;
136: {
137:
138: /*
139: * No max transfer at this level.
140: */
141: minphys(bp);
142: }
143:
144: /*
145: * used by specific ssh controller
146: *
147: */
148: int
149: ssh_scsicmd(xs)
150: struct scsi_xfer *xs;
151: {
152: struct ssh_acb *acb;
153: struct ssh_softc *sc;
154: struct scsi_link *slp;
155: int flags, s;
156:
157: slp = xs->sc_link;
158: sc = slp->adapter_softc;
159: flags = xs->flags;
160:
161: /* XXXX ?? */
162: if (flags & SCSI_DATA_UIO)
163: panic("ssh: scsi data uio requested");
164:
165: /* XXXX ?? */
166: if (sc->sc_nexus && flags & SCSI_POLL)
167: panic("ssh_scsicmd: busy");
168:
169: s = splbio();
170: acb = TAILQ_FIRST(&sc->free_list);
171: if (acb) {
172: TAILQ_REMOVE(&sc->free_list, acb, chain);
173: }
174: splx(s);
175:
176: if (acb == NULL) {
177: return (TRY_AGAIN_LATER);
178: }
179:
180: acb->flags = ACB_ACTIVE;
181: acb->xs = xs;
182: bcopy(xs->cmd, &acb->cmd, xs->cmdlen);
183: acb->clen = xs->cmdlen;
184: acb->daddr = xs->data;
185: acb->dleft = xs->datalen;
186:
187: s = splbio();
188: TAILQ_INSERT_TAIL(&sc->ready_list, acb, chain);
189:
190: if (sc->sc_nexus == NULL)
191: ssh_sched(sc);
192:
193: splx(s);
194:
195: if (flags & SCSI_POLL || ssh_no_dma)
196: return (ssh_poll(sc, acb));
197: return (SUCCESSFULLY_QUEUED);
198: }
199:
200: int
201: ssh_poll(sc, acb)
202: struct ssh_softc *sc;
203: struct ssh_acb *acb;
204: {
205: ssh_regmap_p rp = sc->sc_sshp;
206: struct scsi_xfer *xs = acb->xs;
207: int i;
208: int status;
209: u_char istat;
210: u_char dstat;
211: u_char sstat0;
212: int s;
213: int to;
214:
215: s = splbio();
216: to = xs->timeout / 1000;
217: if (!TAILQ_EMPTY(&sc->nexus_list))
218: printf("%s: ssh_poll called with disconnected device\n",
219: sc->sc_dev.dv_xname);
220: for (;;) {
221: /* use cmd_wait values? */
222: i = 50000;
223: while (((istat = rp->ssh_istat) &
224: (SSH_ISTAT_SIP | SSH_ISTAT_DIP)) == 0) {
225: if (--i <= 0) {
226: #ifdef DEBUG
227: printf ("waiting: tgt %d cmd %02x sbcl %02x dsp %x (+%x) dcmd %x ds %x timeout %d\n",
228: xs->sc_link->target, acb->cmd.opcode,
229: rp->ssh_sbcl, rp->ssh_dsp,
230: rp->ssh_dsp - sc->sc_scriptspa,
231: *((long *)&rp->ssh_dcmd), &acb->ds, acb->xs->timeout);
232: #endif
233: i = 50000;
234: --to;
235: if (to <= 0) {
236: sshreset(sc);
237: return (COMPLETE);
238: }
239: }
240: delay(10);
241: }
242: sstat0 = rp->ssh_sstat0;
243: dstat = rp->ssh_dstat;
244: if (ssh_checkintr(sc, istat, dstat, sstat0, &status)) {
245: if (acb != sc->sc_nexus)
246: printf("%s: ssh_poll disconnected device completed\n",
247: sc->sc_dev.dv_xname);
248: else if ((sc->sc_flags & SSH_INTDEFER) == 0) {
249: sc->sc_flags &= ~SSH_INTSOFF;
250: rp->ssh_sien = sc->sc_sien;
251: rp->ssh_dien = sc->sc_dien;
252: }
253: ssh_scsidone(sc->sc_nexus, status);
254: }
255: if (xs->flags & ITSDONE)
256: break;
257: }
258: splx(s);
259: return (COMPLETE);
260: }
261:
262: /*
263: * start next command that's ready
264: */
265: void
266: ssh_sched(sc)
267: struct ssh_softc *sc;
268: {
269: struct scsi_link *slp;
270: struct ssh_acb *acb;
271: int i;
272:
273: #ifdef DEBUG
274: if (sc->sc_nexus) {
275: printf("%s: ssh_sched- nexus %x/%d ready %x/%d\n",
276: sc->sc_dev.dv_xname, sc->sc_nexus,
277: sc->sc_nexus->xs->sc_link->target,
278: TAILQ_FIRST(&sc->ready_list),
279: TAILQ_FIRST(&sc->ready_list)->xs->sc_link->target);
280: return;
281: }
282: #endif
283: TAILQ_FOREACH(acb, &sc->ready_list, chain) {
284: slp = acb->xs->sc_link;
285: i = slp->target;
286: if (!(sc->sc_tinfo[i].lubusy & (1 << slp->lun))) {
287: struct ssh_tinfo *ti = &sc->sc_tinfo[i];
288:
289: TAILQ_REMOVE(&sc->ready_list, acb, chain);
290: sc->sc_nexus = acb;
291: slp = acb->xs->sc_link;
292: ti = &sc->sc_tinfo[slp->target];
293: ti->lubusy |= (1 << slp->lun);
294: break;
295: }
296: }
297:
298: if (acb == NULL) {
299: #ifdef DEBUGXXX
300: printf("%s: ssh_sched didn't find ready command\n",
301: sc->sc_dev.dv_xname);
302: #endif
303: return;
304: }
305:
306: if (acb->xs->flags & SCSI_RESET)
307: sshreset(sc);
308:
309: #if 0
310: acb->cmd.bytes[0] |= slp->lun << 5; /* XXXX */
311: #endif
312: ++sc->sc_active;
313: ssh_select(sc);
314: }
315:
316: void
317: ssh_scsidone(acb, stat)
318: struct ssh_acb *acb;
319: int stat;
320: {
321: struct scsi_xfer *xs;
322: struct scsi_link *slp;
323: struct ssh_softc *sc;
324: int dosched = 0;
325:
326: if (acb == NULL || (xs = acb->xs) == NULL) {
327: #ifdef DIAGNOSTIC
328: printf("ssh_scsidone: NULL acb or scsi_xfer\n");
329: #if defined(DEBUG) && defined(DDB)
330: Debugger();
331: #endif
332: #endif
333: return;
334: }
335: slp = xs->sc_link;
336: sc = slp->adapter_softc;
337:
338: /*
339: * is this right?
340: */
341: xs->status = stat;
342:
343: if (xs->error == XS_NOERROR && !(acb->flags & ACB_CHKSENSE)) {
344: if (stat == SCSI_CHECK) {
345: struct scsi_sense *ss = (void *)&acb->cmd;
346: bzero(ss, sizeof(*ss));
347: ss->opcode = REQUEST_SENSE;
348: ss->byte2 = slp->lun << 5;
349: ss->length = sizeof(struct scsi_sense_data);
350: acb->clen = sizeof(*ss);
351: acb->daddr = (char *)&xs->sense;
352: acb->dleft = sizeof(struct scsi_sense_data);
353: acb->flags = ACB_ACTIVE | ACB_CHKSENSE;
354: TAILQ_INSERT_HEAD(&sc->ready_list, acb, chain);
355: --sc->sc_active;
356: sc->sc_tinfo[slp->target].lubusy &=
357: ~(1 << slp->lun);
358: sc->sc_tinfo[slp->target].senses++;
359: if (sc->sc_nexus == acb) {
360: sc->sc_nexus = NULL;
361: ssh_sched(sc);
362: }
363: SSH_TRACE('d','s',0,0)
364: return;
365: }
366: }
367: if (xs->error == XS_NOERROR && (acb->flags & ACB_CHKSENSE)) {
368: xs->error = XS_SENSE;
369: } else {
370: xs->resid = 0; /* XXXX */
371: }
372:
373: #if whataboutthisone
374: case SCSI_BUSY:
375: xs->error = XS_BUSY;
376: break;
377: #endif
378:
379: xs->flags |= ITSDONE;
380:
381: /*
382: * Remove the ACB from whatever queue it's on. We have to do a bit of
383: * a hack to figure out which queue it's on. Note that it is *not*
384: * necessary to cdr down the ready queue, but we must cdr down the
385: * nexus queue and see if it's there, so we can mark the unit as no
386: * longer busy. This code is sickening, but it works.
387: */
388: if (acb == sc->sc_nexus) {
389: sc->sc_nexus = NULL;
390: sc->sc_tinfo[slp->target].lubusy &= ~(1<<slp->lun);
391: if (!TAILQ_EMPTY(&sc->ready_list))
392: dosched = 1; /* start next command */
393: --sc->sc_active;
394: SSH_TRACE('d','a',stat,0)
395: } else if (TAILQ_LAST(&sc->ready_list, acb_list) ==
396: TAILQ_NEXT(acb, chain)) {
397: TAILQ_REMOVE(&sc->ready_list, acb, chain);
398: SSH_TRACE('d','r',stat,0)
399: } else {
400: register struct ssh_acb *acb2;
401: TAILQ_FOREACH(acb2, &sc->nexus_list, chain)
402: if (acb2 == acb) {
403: TAILQ_REMOVE(&sc->nexus_list, acb, chain);
404: sc->sc_tinfo[slp->target].lubusy
405: &= ~(1<<slp->lun);
406: --sc->sc_active;
407: break;
408: }
409: if (acb2)
410: ;
411: else if (TAILQ_NEXT(acb, chain) != NULL) {
412: TAILQ_REMOVE(&sc->ready_list, acb, chain);
413: --sc->sc_active;
414: } else {
415: printf("%s: can't find matching acb\n",
416: sc->sc_dev.dv_xname);
417: #ifdef DDB
418: /* Debugger(); */
419: #endif
420: }
421: SSH_TRACE('d','n',stat,0);
422: }
423: /* Put it on the free list. */
424: acb->flags = ACB_FREE;
425: TAILQ_INSERT_HEAD(&sc->free_list, acb, chain);
426:
427: sc->sc_tinfo[slp->target].cmds++;
428:
429: scsi_done(xs);
430:
431: if (dosched && sc->sc_nexus == NULL)
432: ssh_sched(sc);
433: }
434:
435: void
436: sshabort(sc, rp, where)
437: register struct ssh_softc *sc;
438: ssh_regmap_p rp;
439: char *where;
440: {
441: #ifdef fix_this
442: int i;
443: #endif
444:
445: printf ("%s: abort %s: dstat %02x, sstat0 %02x sbcl %02x\n",
446: sc->sc_dev.dv_xname,
447: where, rp->ssh_dstat, rp->ssh_sstat0, rp->ssh_sbcl);
448:
449: if (sc->sc_active > 0) {
450: #ifdef TODO
451: SET_SBIC_cmd (rp, SBIC_CMD_ABORT);
452: WAIT_CIP (rp);
453:
454: GET_SBIC_asr (rp, asr);
455: if (asr & (SBIC_ASR_BSY|SBIC_ASR_LCI)) {
456: /* ok, get more drastic.. */
457:
458: SET_SBIC_cmd (rp, SBIC_CMD_RESET);
459: delay(25);
460: SBIC_WAIT(rp, SBIC_ASR_INT, 0);
461: GET_SBIC_csr (rp, csr); /* clears interrupt also */
462:
463: return;
464: }
465:
466: do {
467: SBIC_WAIT (rp, SBIC_ASR_INT, 0);
468: GET_SBIC_csr (rp, csr);
469: }
470: while ((csr != SBIC_CSR_DISC) && (csr != SBIC_CSR_DISC_1)
471: && (csr != SBIC_CSR_CMD_INVALID));
472: #endif
473:
474: /* lets just hope it worked.. */
475: #ifdef fix_this
476: for (i = 0; i < 2; ++i) {
477: if (sc->sc_iob[i].sc_xs && &sc->sc_iob[i] !=
478: sc->sc_cur) {
479: printf ("sshabort: cleanup!\n");
480: sc->sc_iob[i].sc_xs = NULL;
481: }
482: }
483: #endif /* fix_this */
484: /* sc->sc_active = 0; */
485: }
486: }
487:
488: void
489: sshinitialize(sc)
490: struct ssh_softc *sc;
491: {
492: /*
493: * Need to check that scripts is on a long word boundary
494: * Also should verify that dev doesn't span non-contiguous
495: * physical pages.
496: */
497: sc->sc_scriptspa = kvtop((vaddr_t)scripts);
498:
499: /*
500: * malloc sc_acb to ensure that DS is on a long word boundary.
501: */
502:
503: MALLOC(sc->sc_acb, struct ssh_acb *,
504: sizeof(struct ssh_acb) * SSH_NACB, M_DEVBUF, M_NOWAIT);
505: if (sc->sc_acb == NULL)
506: panic("sshinitialize: ACB malloc failed!");
507:
508: sc->sc_tcp[1] = 1000 / sc->sc_clock_freq;
509: sc->sc_tcp[2] = 1500 / sc->sc_clock_freq;
510: sc->sc_tcp[3] = 2000 / sc->sc_clock_freq;
511: sc->sc_minsync = sc->sc_tcp[1]; /* in 4ns units */
512: if (sc->sc_minsync < 25)
513: sc->sc_minsync = 25;
514: #if not_used
515: if (sc->sc_clock_freq <= 25)
516: sc->sc_tcp[0] = sc->sc_tcp[1];
517: else if (sc->sc_clock_freq <= 37)
518: sc->sc_tcp[0] = sc->sc_tcp[2];
519: else if (sc->sc_clock_freq <= 50)
520: sc->sc_tcp[0] = sc->sc_tcp[3];
521: else
522: sc->sc_tcp[0] = 3000 / sc->sc_clock_freq;
523: #endif
524:
525: sshreset (sc);
526: }
527:
528: void
529: sshreset(sc)
530: struct ssh_softc *sc;
531: {
532: ssh_regmap_p rp;
533: u_int i, s;
534: u_char dummy;
535: struct ssh_acb *acb;
536:
537: rp = sc->sc_sshp;
538:
539: if (sc->sc_flags & SSH_ALIVE)
540: sshabort(sc, rp, "reset");
541:
542: s = splbio();
543:
544: /*
545: * Reset the chip
546: * XXX - is this really needed?
547: */
548: rp->ssh_istat |= SSH_ISTAT_ABRT; /* abort current script */
549: rp->ssh_istat |= SSH_ISTAT_RST; /* reset chip */
550: rp->ssh_istat &= ~SSH_ISTAT_RST;
551: /*
552: * Reset SCSI bus (do we really want this?)
553: */
554: rp->ssh_sien = 0;
555: rp->ssh_scntl1 |= SSH_SCNTL1_RST;
556: delay(1);
557: rp->ssh_scntl1 &= ~SSH_SCNTL1_RST;
558:
559: /*
560: * Set up various chip parameters
561: */
562: rp->ssh_scntl0 = SSH_ARB_FULL | SSH_SCNTL0_EPC | SSH_SCNTL0_EPG;
563: rp->ssh_scntl1 = SSH_SCNTL1_ESR;
564: rp->ssh_dcntl = sc->sc_dcntl;
565: rp->ssh_dmode = 0x80; /* burst length = 4 */
566: rp->ssh_sien = 0x00; /* don't enable interrupts yet */
567: rp->ssh_dien = 0x00; /* don't enable interrupts yet */
568: rp->ssh_scid = 1 << sc->sc_link.adapter_target;
569: rp->ssh_dwt = 0x00;
570: rp->ssh_ctest0 |= SSH_CTEST0_BTD | SSH_CTEST0_EAN;
571: rp->ssh_ctest7 = sc->sc_ctest7;
572:
573: /* will need to re-negotiate sync xfers */
574: bzero(&sc->sc_sync, sizeof (sc->sc_sync));
575:
576: i = rp->ssh_istat;
577: if (i & SSH_ISTAT_SIP)
578: dummy = rp->ssh_sstat0;
579: if (i & SSH_ISTAT_DIP)
580: dummy = rp->ssh_dstat;
581:
582: splx(s);
583:
584: delay(ssh_reset_delay * 1000);
585: printf(": version %d target %d\n", rp->ssh_ctest8 >> 4,
586: sc->sc_link.adapter_target);
587:
588: if ((sc->sc_flags & SSH_ALIVE) == 0) {
589: TAILQ_INIT(&sc->ready_list);
590: TAILQ_INIT(&sc->nexus_list);
591: TAILQ_INIT(&sc->free_list);
592: sc->sc_nexus = NULL;
593: acb = sc->sc_acb;
594: bzero(acb, sizeof(struct ssh_acb) * SSH_NACB);
595: for (i = 0; i < SSH_NACB; i++) {
596: TAILQ_INSERT_TAIL(&sc->free_list, acb, chain);
597: acb++;
598: }
599: bzero(sc->sc_tinfo, sizeof(sc->sc_tinfo));
600: } else {
601: if (sc->sc_nexus != NULL) {
602: sc->sc_nexus->xs->error = XS_DRIVER_STUFFUP;
603: ssh_scsidone(sc->sc_nexus, sc->sc_nexus->stat[0]);
604: }
605: while ((acb = TAILQ_FIRST(&sc->nexus_list))) {
606: acb->xs->error = XS_DRIVER_STUFFUP;
607: ssh_scsidone(acb, acb->stat[0]);
608: }
609: }
610:
611: sc->sc_flags |= SSH_ALIVE;
612: sc->sc_flags &= ~(SSH_INTDEFER|SSH_INTSOFF);
613: /* enable SCSI and DMA interrupts */
614: sc->sc_sien = SSH_SIEN_M_A | SSH_SIEN_STO | /*SSH_SIEN_SEL |*/ SSH_SIEN_SGE |
615: SSH_SIEN_UDC | SSH_SIEN_RST | SSH_SIEN_PAR;
616: sc->sc_dien = SSH_DIEN_BF | SSH_DIEN_ABRT | SSH_DIEN_SIR |
617: /*SSH_DIEN_WTD |*/ SSH_DIEN_IID;
618: rp->ssh_sien = sc->sc_sien;
619: rp->ssh_dien = sc->sc_dien;
620: }
621:
622: /*
623: * Setup Data Storage for 53C710 and start SCRIPTS processing
624: */
625:
626: void
627: ssh_start (sc, target, lun, cbuf, clen, buf, len)
628: struct ssh_softc *sc;
629: int target;
630: int lun;
631: u_char *cbuf;
632: int clen;
633: u_char *buf;
634: int len;
635: {
636: ssh_regmap_p rp = sc->sc_sshp;
637: #ifdef DEBUG
638: int i;
639: #endif
640: int nchain;
641: int count, tcount;
642: char *addr, *dmaend;
643: struct ssh_acb *acb = sc->sc_nexus;
644:
645: #ifdef DEBUG
646: if (ssh_debug & 0x100 && rp->ssh_sbcl & SSH_BSY) {
647: printf ("ACK! ssh was busy: rp %x script %x dsa %x active %d\n",
648: rp, &scripts, &acb->ds, sc->sc_active);
649: printf ("istat %02x sfbr %02x lcrc %02x sien %02x dien %02x\n",
650: rp->ssh_istat, rp->ssh_sfbr, rp->ssh_lcrc,
651: rp->ssh_sien, rp->ssh_dien);
652: #ifdef DDB
653: /*Debugger();*/
654: #endif
655: }
656: #endif
657: acb->msgout[0] = MSG_IDENTIFY | lun;
658: if (ssh_allow_disc[target] & 2 ||
659: (ssh_allow_disc[target] && len == 0))
660: acb->msgout[0] = MSG_IDENTIFY_DR | lun;
661: acb->status = 0;
662: acb->stat[0] = -1;
663: acb->msg[0] = -1;
664: acb->ds.scsi_addr = (0x10000 << target) | (sc->sc_sync[target].sxfer << 8);
665: acb->ds.idlen = 1;
666: acb->ds.idbuf = (char *) kvtop((vaddr_t)&acb->msgout[0]);
667: acb->ds.cmdlen = clen;
668: acb->ds.cmdbuf = (char *) kvtop((vaddr_t)cbuf);
669: acb->ds.stslen = 1;
670: acb->ds.stsbuf = (char *) kvtop((vaddr_t)&acb->stat[0]);
671: acb->ds.msglen = 1;
672: acb->ds.msgbuf = (char *) kvtop((vaddr_t)&acb->msg[0]);
673: acb->msg[1] = -1;
674: acb->ds.msginlen = 1;
675: acb->ds.extmsglen = 1;
676: acb->ds.synmsglen = 3;
677: acb->ds.msginbuf = (char *) kvtop((vaddr_t)&acb->msg[1]);
678: acb->ds.extmsgbuf = (char *) kvtop((vaddr_t)&acb->msg[2]);
679: acb->ds.synmsgbuf = (char *) kvtop((vaddr_t)&acb->msg[3]);
680: bzero(&acb->ds.chain, sizeof (acb->ds.chain));
681:
682: if (sc->sc_sync[target].state == SYNC_START) {
683: if (ssh_inhibit_sync[target]) {
684: sc->sc_sync[target].state = SYNC_DONE;
685: sc->sc_sync[target].sbcl = 0;
686: sc->sc_sync[target].sxfer = 0;
687: #ifdef DEBUG
688: if (sshsync_debug)
689: printf ("Forcing target %d asynchronous\n", target);
690: #endif
691: } else {
692: acb->msg[2] = -1;
693: acb->msgout[1] = MSG_EXT_MESSAGE;
694: acb->msgout[2] = 3;
695: acb->msgout[3] = MSG_SYNC_REQ;
696: #ifdef MAXTOR_SYNC_KLUDGE
697: acb->msgout[4] = 50 / 4; /* ask for ridiculous period */
698: #else
699: acb->msgout[4] = sc->sc_minsync;
700: #endif
701: acb->msgout[5] = SSH_MAX_OFFSET;
702: acb->ds.idlen = 6;
703: sc->sc_sync[target].state = SYNC_SENT;
704: #ifdef DEBUG
705: if (sshsync_debug)
706: printf ("Sending sync request to target %d\n", target);
707: #endif
708: }
709: }
710:
711: /*
712: * Build physical DMA addresses for scatter/gather I/O
713: */
714: acb->iob_buf = buf;
715: acb->iob_len = len;
716: acb->iob_curbuf = acb->iob_curlen = 0;
717: nchain = 0;
718: count = len;
719: addr = buf;
720: dmaend = NULL;
721: while (count > 0) {
722: acb->ds.chain[nchain].databuf = (char *) kvtop ((vaddr_t)addr);
723: if (count < (tcount = NBPG - ((int) addr & PGOFSET)))
724: tcount = count;
725: acb->ds.chain[nchain].datalen = tcount;
726: addr += tcount;
727: count -= tcount;
728: if (acb->ds.chain[nchain].databuf == dmaend) {
729: dmaend += acb->ds.chain[nchain].datalen;
730: acb->ds.chain[nchain].datalen = 0;
731: acb->ds.chain[--nchain].datalen += tcount;
732: #ifdef DEBUG
733: ++sshdma_hits;
734: #endif
735: } else {
736: dmaend = acb->ds.chain[nchain].databuf +
737: acb->ds.chain[nchain].datalen;
738: acb->ds.chain[nchain].datalen = tcount;
739: #ifdef DEBUG
740: if (nchain) /* Don't count miss on first one */
741: ++sshdma_misses;
742: #endif
743: }
744: ++nchain;
745: }
746: #ifdef DEBUG
747: if (nchain != 1 && len != 0 && ssh_debug & 3) {
748: printf ("DMA chaining set: %d\n", nchain);
749: for (i = 0; i < nchain; ++i) {
750: printf (" [%d] %8x %4x\n", i, acb->ds.chain[i].databuf,
751: acb->ds.chain[i].datalen);
752: }
753: }
754: #endif
755:
756: /* push data cache for all data the 53c710 needs to access */
757: dma_cachectl((caddr_t)acb, sizeof (struct ssh_acb));
758: dma_cachectl(cbuf, clen);
759: if (buf != NULL && len != 0)
760: dma_cachectl(buf, len);
761:
762: #ifdef DEBUG
763: if (ssh_debug & 0x100 && rp->ssh_sbcl & SSH_BSY) {
764: printf ("ACK! ssh was busy at start: rp %x script %x dsa %x active %d\n",
765: rp, &scripts, &acb->ds, sc->sc_active);
766: #ifdef DDB
767: /*Debugger();*/
768: #endif
769: }
770: #endif
771:
772: if (TAILQ_EMPTY(&sc->nexus_list)) {
773: if (rp->ssh_istat & SSH_ISTAT_CON)
774: printf("%s: ssh_select while connected?\n",
775: sc->sc_dev.dv_xname);
776: rp->ssh_temp = 0;
777: rp->ssh_sbcl = sc->sc_sync[target].sbcl;
778: rp->ssh_dsa = kvtop((vaddr_t)&acb->ds);
779: rp->ssh_dsp = sc->sc_scriptspa;
780: SSH_TRACE('s',1,0,0)
781: } else {
782: if ((rp->ssh_istat & SSH_ISTAT_CON) == 0) {
783: rp->ssh_istat = SSH_ISTAT_SIGP;
784: SSH_TRACE('s',2,0,0);
785: } else {
786: SSH_TRACE('s',3,rp->ssh_istat,0);
787: }
788: }
789: #ifdef DEBUG
790: ++sshstarts;
791: #endif
792: }
793:
794: /*
795: * Process a DMA or SCSI interrupt from the 53C710 SSH
796: */
797:
798: int
799: ssh_checkintr(sc, istat, dstat, sstat0, status)
800: struct ssh_softc *sc;
801: u_char istat;
802: u_char dstat;
803: u_char sstat0;
804: int *status;
805: {
806: ssh_regmap_p rp = sc->sc_sshp;
807: struct ssh_acb *acb = sc->sc_nexus;
808: int target;
809: int dfifo, dbc, sstat1;
810:
811: dfifo = rp->ssh_dfifo;
812: dbc = rp->ssh_dbc0;
813: sstat1 = rp->ssh_sstat1;
814: rp->ssh_ctest8 |= SSH_CTEST8_CLF;
815: while ((rp->ssh_ctest1 & SSH_CTEST1_FMT) != SSH_CTEST1_FMT)
816: ;
817: rp->ssh_ctest8 &= ~SSH_CTEST8_CLF;
818: #ifdef DEBUG
819: ++sshints;
820: #if 0
821: if (ssh_debug & 0x100) {
822: dma_cachectl(&acb->stat[0], 1);
823: printf ("sshchkintr: istat %x dstat %x sstat0 %x dsps %x sbcl %x sts %x msg %x\n",
824: istat, dstat, sstat0, rp->ssh_dsps, rp->ssh_sbcl, acb->stat[0], acb->msg[0]);
825: printf ("sync msg in: %02x %02x %02x %02x %02x %02x\n",
826: acb->msg[0], acb->msg[1], acb->msg[2],
827: acb->msg[3], acb->msg[4], acb->msg[5]);
828: }
829: #endif
830: if (rp->ssh_dsp && (rp->ssh_dsp < sc->sc_scriptspa ||
831: rp->ssh_dsp >= sc->sc_scriptspa + sizeof(scripts))) {
832: printf ("%s: dsp not within script dsp %x scripts %x:%x",
833: sc->sc_dev.dv_xname, rp->ssh_dsp, sc->sc_scriptspa,
834: sc->sc_scriptspa + sizeof(scripts));
835: printf(" istat %x dstat %x sstat0 %x\n",
836: istat, dstat, sstat0);
837: Debugger();
838: }
839: #endif
840: SSH_TRACE('i',dstat,istat,(istat&SSH_ISTAT_DIP)?rp->ssh_dsps&0xff:sstat0);
841: if (dstat & SSH_DSTAT_SIR && rp->ssh_dsps == 0xff00) {
842: /* Normal completion status, or check condition */
843: #ifdef DEBUG
844: if (rp->ssh_dsa != kvtop(&acb->ds)) {
845: printf ("ssh: invalid dsa: %x %x\n", rp->ssh_dsa,
846: kvtop(&acb->ds));
847: panic("*** ssh DSA invalid ***");
848: }
849: #endif
850: target = acb->xs->sc_link->target;
851: if (sc->sc_sync[target].state == SYNC_SENT) {
852: #ifdef DEBUG
853: if (sshsync_debug)
854: printf ("sync msg in: %02x %02x %02x %02x %02x %02x\n",
855: acb->msg[0], acb->msg[1], acb->msg[2],
856: acb->msg[3], acb->msg[4], acb->msg[5]);
857: #endif
858: if (acb->msg[1] == 0xff)
859: printf ("%s: target %d ignored sync request\n",
860: sc->sc_dev.dv_xname, target);
861: else if (acb->msg[1] == MSG_REJECT)
862: printf ("%s: target %d rejected sync request\n",
863: sc->sc_dev.dv_xname, target);
864: sc->sc_sync[target].state = SYNC_DONE;
865: sc->sc_sync[target].sxfer = 0;
866: sc->sc_sync[target].sbcl = 0;
867: if (acb->msg[2] == 3 &&
868: acb->msg[3] == MSG_SYNC_REQ &&
869: acb->msg[5] != 0) {
870: #ifdef MAXTOR_KLUDGE
871: /*
872: * Kludge for my Maxtor XT8580S
873: * It accepts whatever we request, even
874: * though it won't work. So we ask for
875: * a short period than we can handle. If
876: * the device says it can do it, use 208ns.
877: * If the device says it can do less than
878: * 100ns, then we limit it to 100ns.
879: */
880: if (acb->msg[4] && acb->msg[4] < 100 / 4) {
881: #ifdef DEBUG
882: printf ("%d: target %d wanted %dns period\n",
883: sc->sc_dev.dv_xname, target,
884: acb->msg[4] * 4);
885: #endif
886: if (acb->msg[4] == 50 / 4)
887: acb->msg[4] = 208 / 4;
888: else
889: acb->msg[4] = 100 / 4;
890: }
891: #endif /* MAXTOR_KLUDGE */
892: printf ("%s: target %d now synchronous, period=%dns, offset=%d\n",
893: sc->sc_dev.dv_xname, target,
894: acb->msg[4] * 4, acb->msg[5]);
895: scsi_period_to_ssh (sc, target);
896: }
897: }
898: dma_cachectl(&acb->stat[0], 1);
899: *status = acb->stat[0];
900: #ifdef DEBUG
901: if (rp->ssh_sbcl & SSH_BSY) {
902: /*printf ("ACK! ssh was busy at end: rp %x script %x dsa %x\n",
903: rp, &scripts, &acb->ds);*/
904: #ifdef DDB
905: /*Debugger();*/
906: #endif
907: }
908: if (acb->msg[0] != 0x00)
909: printf("%s: message was not COMMAND COMPLETE: %x\n",
910: sc->sc_dev.dv_xname, acb->msg[0]);
911: #endif
912: if (!TAILQ_EMPTY(&sc->nexus_list))
913: rp->ssh_dcntl |= SSH_DCNTL_STD;
914: return 1;
915: }
916: if (sstat0 & SSH_SSTAT0_M_A) { /* Phase mismatch */
917: #ifdef DEBUG
918: ++sshphmm;
919: if (acb == NULL)
920: printf("%s: Phase mismatch with no active command?\n",
921: sc->sc_dev.dv_xname);
922: #endif
923: if (acb->iob_len) {
924: int adjust;
925: adjust = ((dfifo - (dbc & 0x7f)) & 0x7f);
926: if (sstat1 & SSH_SSTAT1_ORF)
927: ++adjust;
928: if (sstat1 & SSH_SSTAT1_OLF)
929: ++adjust;
930: acb->iob_curlen = *((long *)&rp->ssh_dcmd) & 0xffffff;
931: acb->iob_curlen += adjust;
932: acb->iob_curbuf = *((long *)&rp->ssh_dnad) - adjust;
933: #ifdef DEBUG
934: if (ssh_debug & 0x100) {
935: int i;
936: printf ("Phase mismatch: curbuf %x curlen %x dfifo %x dbc %x sstat1 %x adjust %x sbcl %x starts %d acb %x\n",
937: acb->iob_curbuf, acb->iob_curlen, dfifo,
938: dbc, sstat1, adjust, rp->ssh_sbcl, sshstarts, acb);
939: if (acb->ds.chain[1].datalen) {
940: for (i = 0; acb->ds.chain[i].datalen; ++i)
941: printf("chain[%d] addr %x len %x\n",
942: i, acb->ds.chain[i].databuf,
943: acb->ds.chain[i].datalen);
944: }
945: }
946: #endif
947: dma_cachectl((caddr_t)acb, sizeof(*acb));
948: }
949: #ifdef DEBUG
950: SSH_TRACE('m',rp->ssh_sbcl,(rp->ssh_dsp>>8),rp->ssh_dsp);
951: if (ssh_debug & 9)
952: printf ("Phase mismatch: %x dsp +%x dcmd %x\n",
953: rp->ssh_sbcl,
954: rp->ssh_dsp - sc->sc_scriptspa,
955: *((long *)&rp->ssh_dcmd));
956: #endif
957: if ((rp->ssh_sbcl & SSH_REQ) == 0) {
958: printf ("Phase mismatch: REQ not asserted! %02x dsp %lx\n",
959: rp->ssh_sbcl, rp->ssh_dsp);
960: #ifdef DEBUG
961: Debugger();
962: #endif
963: }
964: switch (rp->ssh_sbcl & 7) {
965: case 0: /* data out */
966: case 1: /* data in */
967: case 2: /* status */
968: case 3: /* command */
969: case 6: /* message in */
970: case 7: /* message out */
971: rp->ssh_dsp = sc->sc_scriptspa + Ent_switch;
972: break;
973: default:
974: goto bad_phase;
975: }
976: return 0;
977: }
978: if (sstat0 & SSH_SSTAT0_STO) { /* Select timed out */
979: #ifdef DEBUG
980: if (acb == NULL)
981: printf("%s: Select timeout with no active command?\n",
982: sc->sc_dev.dv_xname);
983: if (rp->ssh_sbcl & SSH_BSY) {
984: printf ("ACK! ssh was busy at timeout: rp %x script %x dsa %x\n",
985: rp, &scripts, &acb->ds);
986: printf(" sbcl %x sdid %x istat %x dstat %x sstat0 %x\n",
987: rp->ssh_sbcl, rp->ssh_sdid, istat, dstat, sstat0);
988: if (!(rp->ssh_sbcl & SSH_BSY)) {
989: printf ("Yikes, it's not busy now!\n");
990: #if 0
991: *status = -1;
992: if (!TAILQ_EMPTY(&sc->nexus_list))
993: rp->ssh_dsp = sc->sc_scriptspa + Ent_wait_reselect;
994: return 1;
995: #endif
996: }
997: /* rp->ssh_dcntl |= SSH_DCNTL_STD;*/
998: return (0);
999: #ifdef DDB
1000: Debugger();
1001: #endif
1002: }
1003: #endif
1004: *status = -1;
1005: acb->xs->error = XS_SELTIMEOUT;
1006: if (!TAILQ_EMPTY(&sc->nexus_list))
1007: rp->ssh_dsp = sc->sc_scriptspa + Ent_wait_reselect;
1008: return 1;
1009: }
1010: if (acb)
1011: target = acb->xs->sc_link->target;
1012: else
1013: target = 7;
1014: if (sstat0 & SSH_SSTAT0_UDC) {
1015: #ifdef DEBUG
1016: if (acb == NULL)
1017: printf("%s: Unexpected disconnect with no active command?\n",
1018: sc->sc_dev.dv_xname);
1019: printf ("%s: target %d disconnected unexpectedly\n",
1020: sc->sc_dev.dv_xname, target);
1021: #endif
1022: #if 0
1023: sshabort (sc, rp, "sshchkintr");
1024: #endif
1025: *status = STS_BUSY;
1026: if (!TAILQ_EMPTY(&sc->nexus_list))
1027: rp->ssh_dsp = sc->sc_scriptspa + Ent_wait_reselect;
1028: return 1;
1029: }
1030: if (dstat & SSH_DSTAT_SIR && (rp->ssh_dsps == 0xff01 ||
1031: rp->ssh_dsps == 0xff02)) {
1032: #ifdef DEBUG
1033: if (ssh_debug & 0x100)
1034: printf ("%s: ID %02x disconnected TEMP %x (+%x) curbuf %x curlen %x buf %x len %x dfifo %x dbc %x sstat1 %x starts %d acb %x\n",
1035: sc->sc_dev.dv_xname, 1 << target, rp->ssh_temp,
1036: rp->ssh_temp ? rp->ssh_temp - sc->sc_scriptspa : 0,
1037: acb->iob_curbuf, acb->iob_curlen,
1038: acb->ds.chain[0].databuf, acb->ds.chain[0].datalen, dfifo, dbc, sstat1, sshstarts, acb);
1039: #endif
1040: if (acb == NULL) {
1041: printf("%s: Disconnect with no active command?\n",
1042: sc->sc_dev.dv_xname);
1043: return (0);
1044: }
1045: /*
1046: * XXXX need to update iob_curbuf/iob_curlen to reflect
1047: * current data transferred. If device disconnected in
1048: * the middle of a DMA block, they should already be set
1049: * by the phase change interrupt. If the disconnect
1050: * occurs on a DMA block boundary, we have to figure out
1051: * which DMA block it was.
1052: */
1053: if (acb->iob_len && rp->ssh_temp) {
1054: int n = rp->ssh_temp - sc->sc_scriptspa;
1055:
1056: if (acb->iob_curlen && acb->iob_curlen != acb->ds.chain[0].datalen)
1057: printf("%s: iob_curbuf/len already set? n %x iob %lx/%lx chain[0] %p/%lx\n",
1058: sc->sc_dev.dv_xname, n, acb->iob_curbuf, acb->iob_curlen,
1059: acb->ds.chain[0].databuf, acb->ds.chain[0].datalen);
1060: if (n < Ent_datain)
1061: n = (n - Ent_dataout) / 16;
1062: else
1063: n = (n - Ent_datain) / 16;
1064: if (n <= 0 || n >= DMAMAXIO)
1065: printf("TEMP invalid %d\n", n);
1066: else {
1067: acb->iob_curbuf = (u_long)acb->ds.chain[n].databuf;
1068: acb->iob_curlen = acb->ds.chain[n].datalen;
1069: }
1070: #ifdef DEBUG
1071: if (ssh_debug & 0x100) {
1072: printf("%s: TEMP offset %d", sc->sc_dev.dv_xname, n);
1073: printf(" curbuf %x curlen %x\n", acb->iob_curbuf,
1074: acb->iob_curlen);
1075: }
1076: #endif
1077: }
1078: /*
1079: * If data transfer was interrupted by disconnect, iob_curbuf
1080: * and iob_curlen should reflect the point of interruption.
1081: * Adjust the DMA chain so that the data transfer begins
1082: * at the appropriate place upon reselection.
1083: * XXX This should only be done on save data pointer message?
1084: */
1085: if (acb->iob_curlen) {
1086: int i, j;
1087:
1088: #ifdef DEBUG
1089: if (ssh_debug & 0x100)
1090: printf ("%s: adjusting DMA chain\n",
1091: sc->sc_dev.dv_xname);
1092: if (rp->ssh_dsps == 0xff02)
1093: printf ("%s: ID %02x disconnected without Save Data Pointers\n",
1094: sc->sc_dev.dv_xname, 1 << target);
1095: #endif
1096: for (i = 0; i < DMAMAXIO; ++i) {
1097: if (acb->ds.chain[i].datalen == 0)
1098: break;
1099: if (acb->iob_curbuf >= (long)acb->ds.chain[i].databuf &&
1100: acb->iob_curbuf < (long)(acb->ds.chain[i].databuf +
1101: acb->ds.chain[i].datalen))
1102: break;
1103: }
1104: if (i >= DMAMAXIO || acb->ds.chain[i].datalen == 0)
1105: printf("couldn't find saved data pointer\n");
1106: #ifdef DEBUG
1107: if (ssh_debug & 0x100)
1108: printf(" chain[0]: %x/%x -> %x/%x\n",
1109: acb->ds.chain[0].databuf,
1110: acb->ds.chain[0].datalen,
1111: acb->iob_curbuf,
1112: acb->iob_curlen);
1113: #endif
1114: acb->ds.chain[0].databuf = (char *)acb->iob_curbuf;
1115: acb->ds.chain[0].datalen = acb->iob_curlen;
1116: for (j = 1, ++i; i < DMAMAXIO && acb->ds.chain[i].datalen; ++i, ++j) {
1117: #ifdef DEBUG
1118: if (ssh_debug & 0x100)
1119: printf(" chain[%d]: %x/%x -> %x/%x\n", j,
1120: acb->ds.chain[j].databuf,
1121: acb->ds.chain[j].datalen,
1122: acb->ds.chain[i].databuf,
1123: acb->ds.chain[i].datalen);
1124: #endif
1125: acb->ds.chain[j].databuf = acb->ds.chain[i].databuf;
1126: acb->ds.chain[j].datalen = acb->ds.chain[i].datalen;
1127: }
1128: if (j < DMAMAXIO)
1129: acb->ds.chain[j++].datalen = 0;
1130: dma_cachectl((caddr_t)&acb->ds.chain,
1131: j * sizeof(acb->ds.chain[0]));
1132: }
1133: ++sc->sc_tinfo[target].dconns;
1134: /*
1135: * add nexus to waiting list
1136: * clear nexus
1137: * try to start another command for another target/lun
1138: */
1139: acb->status = sc->sc_flags & SSH_INTSOFF;
1140: TAILQ_INSERT_HEAD(&sc->nexus_list, acb, chain);
1141: sc->sc_nexus = NULL; /* no current device */
1142: /* start script to wait for reselect */
1143: if (sc->sc_nexus == NULL)
1144: rp->ssh_dsp = sc->sc_scriptspa + Ent_wait_reselect;
1145: /* XXXX start another command ? */
1146: if (!TAILQ_EMPTY(&sc->ready_list))
1147: ssh_sched(sc);
1148: return (0);
1149: }
1150: if (dstat & SSH_DSTAT_SIR && rp->ssh_dsps == 0xff03) {
1151: int reselid = rp->ssh_scratch & 0x7f;
1152: int reselun = rp->ssh_sfbr & 0x07;
1153:
1154: sc->sc_sstat1 = rp->ssh_sbcl; /* XXXX save current SBCL */
1155: #ifdef DEBUG
1156: if (ssh_debug & 0x100)
1157: printf ("%s: target ID %02x reselected dsps %x\n",
1158: sc->sc_dev.dv_xname, reselid,
1159: rp->ssh_dsps);
1160: if ((rp->ssh_sfbr & 0x80) == 0)
1161: printf("%s: Reselect message in was not identify: %x\n",
1162: sc->sc_dev.dv_xname, rp->ssh_sfbr);
1163: #endif
1164: if (sc->sc_nexus) {
1165: #ifdef DEBUG
1166: if (ssh_debug & 0x100)
1167: printf ("%s: reselect ID %02x w/active\n",
1168: sc->sc_dev.dv_xname, reselid);
1169: #endif
1170: TAILQ_INSERT_HEAD(&sc->ready_list, sc->sc_nexus, chain);
1171: sc->sc_tinfo[sc->sc_nexus->xs->sc_link->target].lubusy
1172: &= ~(1 << sc->sc_nexus->xs->sc_link->lun);
1173: --sc->sc_active;
1174: }
1175: /*
1176: * locate acb of reselecting device
1177: * set sc->sc_nexus to acb
1178: */
1179: TAILQ_FOREACH(acb, &sc->nexus_list, chain) {
1180: if (reselid != (acb->ds.scsi_addr >> 16) ||
1181: reselun != (acb->msgout[0] & 0x07))
1182: continue;
1183: TAILQ_REMOVE(&sc->nexus_list, acb, chain);
1184: sc->sc_nexus = acb;
1185: sc->sc_flags |= acb->status;
1186: acb->status = 0;
1187: dma_cachectl(&acb->stat[0], 1); /* XXX necessary? */
1188: rp->ssh_dsa = kvtop((vaddr_t)&acb->ds);
1189: rp->ssh_sxfer = sc->sc_sync[acb->xs->sc_link->target].sxfer;
1190: rp->ssh_sbcl = sc->sc_sync[acb->xs->sc_link->target].sbcl;
1191: break;
1192: }
1193: if (acb == NULL) {
1194: printf("%s: target ID %02x reselect nexus_list %p\n",
1195: sc->sc_dev.dv_xname, reselid,
1196: TAILQ_FIRST(&sc->nexus_list));
1197: panic("unable to find reselecting device");
1198: }
1199: dma_cachectl((caddr_t)acb, sizeof(*acb));
1200: rp->ssh_temp = 0;
1201: rp->ssh_dcntl |= SSH_DCNTL_STD;
1202: return (0);
1203: }
1204: if (dstat & SSH_DSTAT_SIR && rp->ssh_dsps == 0xff04) {
1205: #ifdef DEBUG
1206: u_short ctest2 = rp->ssh_ctest2;
1207:
1208: /* reselect was interrupted (by Sig_P or select) */
1209: if (ssh_debug & 0x100 ||
1210: (ctest2 & SSH_CTEST2_SIGP) == 0)
1211: printf ("%s: reselect interrupted (Sig_P?) scntl1 %x ctest2 %x
1212: sfbr %x istat %x/%x\n", sc->sc_dev.dv_xname, rp->ssh_scntl1,
1213: ctest2, rp->ssh_sfbr, istat, rp->ssh_istat);
1214: #endif
1215: /* XXX assumes it was not select */
1216: if (sc->sc_nexus == NULL) {
1217: printf("%s: reselect interrupted, sc_nexus == NULL\n",
1218: sc->sc_dev.dv_xname);
1219: #if 0
1220: ssh_dump(sc);
1221: #ifdef DDB
1222: Debugger();
1223: #endif
1224: #endif
1225: rp->ssh_dcntl |= SSH_DCNTL_STD;
1226: return (0);
1227: }
1228: target = sc->sc_nexus->xs->sc_link->target;
1229: rp->ssh_temp = 0;
1230: rp->ssh_dsa = kvtop((vaddr_t)&sc->sc_nexus->ds);
1231: rp->ssh_sxfer = sc->sc_sync[target].sxfer;
1232: rp->ssh_sbcl = sc->sc_sync[target].sbcl;
1233: rp->ssh_dsp = sc->sc_scriptspa;
1234: return (0);
1235: }
1236: if (dstat & SSH_DSTAT_SIR && rp->ssh_dsps == 0xff06) {
1237: if (acb == NULL)
1238: printf("%s: Bad message-in with no active command?\n",
1239: sc->sc_dev.dv_xname);
1240: /* Unrecognized message in byte */
1241: dma_cachectl(&acb->msg[1],1);
1242: printf ("%s: Unrecognized message in data sfbr %x msg %x sbcl %x\n",
1243: sc->sc_dev.dv_xname, rp->ssh_sfbr, acb->msg[1], rp->ssh_sbcl);
1244: /* what should be done here? */
1245: rp->ssh_dsp = sc->sc_scriptspa + Ent_switch;
1246: return (0);
1247: }
1248: if (dstat & SSH_DSTAT_SIR && rp->ssh_dsps == 0xff0a) {
1249: /* Status phase wasn't followed by message in phase? */
1250: printf ("%s: Status phase not followed by message in phase? sbcl %x sbdl %x\n",
1251: sc->sc_dev.dv_xname, rp->ssh_sbcl, rp->ssh_sbdl);
1252: if (rp->ssh_sbcl == 0xa7) {
1253: /* It is now, just continue the script? */
1254: rp->ssh_dcntl |= SSH_DCNTL_STD;
1255: return (0);
1256: }
1257: }
1258: if (sstat0 == 0 && dstat & SSH_DSTAT_SIR) {
1259: dma_cachectl(&acb->stat[0], 1);
1260: dma_cachectl(&acb->msg[0], 1);
1261: printf ("SSH interrupt: %lx sts %x msg %x %x sbcl %x\n",
1262: rp->ssh_dsps, acb->stat[0], acb->msg[0], acb->msg[1],
1263: rp->ssh_sbcl);
1264: sshreset (sc);
1265: *status = -1;
1266: return 0; /* sshreset has cleaned up */
1267: }
1268: if (sstat0 & SSH_SSTAT0_SGE)
1269: printf ("SSH: SCSI Gross Error\n");
1270: if (sstat0 & SSH_SSTAT0_PAR)
1271: printf ("SSH: Parity Error\n");
1272: if (dstat & SSH_DSTAT_IID)
1273: printf ("SSH: Invalid instruction detected\n");
1274: bad_phase:
1275: /*
1276: * temporary panic for unhandled conditions
1277: * displays various things about the 53C710 status and registers
1278: * then panics.
1279: * XXXX need to clean this up to print out the info, reset, and continue
1280: */
1281: printf ("sshchkintr: target %x ds %p\n", target, &acb->ds);
1282: printf ("scripts %lx ds %lx rp %lx dsp %lx dcmd %lx\n", sc->sc_scriptspa,
1283: kvtop((vaddr_t)&acb->ds), kvtop((vaddr_t)rp), rp->ssh_dsp,
1284: *((long *)&rp->ssh_dcmd));
1285: printf ("sshchkintr: istat %x dstat %x sstat0 %x dsps %lx "
1286: "dsa %lx sbcl %x sts %x msg %x %x sfbr %x\n",
1287: istat, dstat, sstat0, rp->ssh_dsps, rp->ssh_dsa,
1288: rp->ssh_sbcl, acb->stat[0], acb->msg[0], acb->msg[1],
1289: rp->ssh_sfbr);
1290: #ifdef DEBUG
1291: if (ssh_debug & 0x20)
1292: panic("sshchkintr: **** temp ****");
1293: #ifdef DDB
1294: /* Debugger(); */
1295: #endif
1296: #endif
1297: sshreset (sc); /* hard reset */
1298: *status = -1;
1299: return 0; /* sshreset cleaned up */
1300: }
1301:
1302: void
1303: ssh_select(sc)
1304: struct ssh_softc *sc;
1305: {
1306: ssh_regmap_p rp;
1307: struct ssh_acb *acb = sc->sc_nexus;
1308:
1309: #ifdef DEBUG
1310: if (ssh_debug & 1)
1311: printf ("%s: select ", sc->sc_dev.dv_xname);
1312: #endif
1313:
1314: rp = sc->sc_sshp;
1315: if (acb->xs->flags & SCSI_POLL || ssh_no_dma) {
1316: sc->sc_flags |= SSH_INTSOFF;
1317: sc->sc_flags &= ~SSH_INTDEFER;
1318: if ((rp->ssh_istat & 0x08) == 0) {
1319: rp->ssh_sien = 0;
1320: rp->ssh_dien = 0;
1321: }
1322: #if 0
1323: } else if ((sc->sc_flags & SSH_INTDEFER) == 0) {
1324: sc->sc_flags &= ~SSH_INTSOFF;
1325: if ((rp->ssh_istat & 0x08) == 0) {
1326: rp->ssh_sien = sc->sc_sien;
1327: rp->ssh_dien = sc->sc_dien;
1328: }
1329: #endif
1330: }
1331: #ifdef DEBUG
1332: if (ssh_debug & 1)
1333: printf ("ssh_select: target %x cmd %02x ds %x\n",
1334: acb->xs->sc_link->target, acb->cmd.opcode,
1335: &sc->sc_nexus->ds);
1336: #endif
1337:
1338: ssh_start(sc, acb->xs->sc_link->target, acb->xs->sc_link->lun,
1339: (u_char *)&acb->cmd, acb->clen, acb->daddr, acb->dleft);
1340:
1341: return;
1342: }
1343:
1344: /*
1345: * 53C710 interrupt handler
1346: */
1347: void
1348: sshintr(sc)
1349: register struct ssh_softc *sc;
1350: {
1351: ssh_regmap_p rp;
1352: register u_char istat, dstat, sstat0;
1353: int status;
1354: int s = splbio();
1355:
1356: istat = sc->sc_istat;
1357: if ((istat & (SSH_ISTAT_SIP | SSH_ISTAT_DIP)) == 0) {
1358: splx(s);
1359: return;
1360: }
1361:
1362: /* Got a valid interrupt on this device */
1363: rp = sc->sc_sshp;
1364: dstat = sc->sc_dstat;
1365: sstat0 = sc->sc_sstat0;
1366: if (dstat & SSH_DSTAT_SIR)
1367: sc->sc_intcode = rp->ssh_dsps;
1368: sc->sc_istat = 0;
1369:
1370: #ifdef DEBUG
1371: if (ssh_debug & 1)
1372: printf ("%s: intr istat %x dstat %x sstat0 %x\n",
1373: sc->sc_dev.dv_xname, istat, dstat, sstat0);
1374: if (!sc->sc_active) {
1375: printf ("%s: spurious interrupt? istat %x dstat %x sstat0 %x status %x\n",
1376: sc->sc_dev.dv_xname, istat, dstat, sstat0, sc->sc_nexus->stat[0]);
1377: }
1378: #else
1379: if (!sc->sc_active) {
1380: printf ("%s: spurious interrupt? istat %x dstat %x sstat0 %x status %x\n",
1381: sc->sc_dev.dv_xname, istat, dstat, sstat0, sc->sc_nexus->stat[0]);
1382: return;
1383: }
1384: #endif
1385:
1386: #ifdef DEBUG
1387: if (ssh_debug & 5) {
1388: dma_cachectl(&sc->sc_nexus->stat[0], 1);
1389: printf ("%s: intr istat %x dstat %x sstat0 %x dsps %x sbcl %x sts %x msg %x\n",
1390: sc->sc_dev.dv_xname, istat, dstat, sstat0,
1391: rp->ssh_dsps, rp->ssh_sbcl,
1392: sc->sc_nexus->stat[0], sc->sc_nexus->msg[0]);
1393: }
1394: #endif
1395: if (sc->sc_flags & SSH_INTDEFER) {
1396: sc->sc_flags &= ~(SSH_INTDEFER | SSH_INTSOFF);
1397: rp->ssh_sien = sc->sc_sien;
1398: rp->ssh_dien = sc->sc_dien;
1399: }
1400: if (ssh_checkintr (sc, istat, dstat, sstat0, &status)) {
1401: #if 1
1402: if (status == 0xff)
1403: printf ("sshintr: status == 0xff\n");
1404: #endif
1405: if ((sc->sc_flags & (SSH_INTSOFF | SSH_INTDEFER)) != SSH_INTSOFF) {
1406: #if 0
1407: if (rp->ssh_sbcl & SSH_BSY) {
1408: printf ("%s: SCSI bus busy at completion",
1409: sc->sc_dev.dv_xname);
1410: printf(" targ %d sbcl %02x sfbr %x lcrc %02x dsp +%x\n",
1411: sc->sc_nexus->xs->sc_link->target,
1412: rp->ssh_sbcl, rp->ssh_sfbr, rp->ssh_lcrc,
1413: rp->ssh_dsp - sc->sc_scriptspa);
1414: }
1415: #endif
1416: ssh_scsidone(sc->sc_nexus, sc->sc_nexus->stat[0]);
1417: }
1418: }
1419: splx(s);
1420: }
1421:
1422: /*
1423: * This is based on the Progressive Peripherals 33MHz Zeus driver and will
1424: * not be correct for other 53c710 boards.
1425: *
1426: */
1427: void
1428: scsi_period_to_ssh (sc, target)
1429: struct ssh_softc *sc;
1430: int target;
1431: {
1432: int period, offset, sxfer, sbcl;
1433:
1434: period = sc->sc_nexus->msg[4];
1435: offset = sc->sc_nexus->msg[5];
1436: for (sbcl = 1; sbcl < 4; ++sbcl) {
1437: sxfer = (period * 4 - 1) / sc->sc_tcp[sbcl] - 3;
1438: if (sxfer >= 0 && sxfer <= 7)
1439: break;
1440: }
1441: if (sbcl > 3) {
1442: printf("ssh_sync: unable to compute sync params for period %dns\n",
1443: period * 4);
1444: /*
1445: * XXX need to pick a value we can do and renegotiate
1446: */
1447: sxfer = sbcl = 0;
1448: } else
1449: sxfer = (sxfer << 4) | ((offset <= SSH_MAX_OFFSET) ?
1450: offset : SSH_MAX_OFFSET);
1451: sc->sc_sync[target].sxfer = sxfer;
1452: sc->sc_sync[target].sbcl = sbcl;
1453: #ifdef DEBUG
1454: printf ("ssh sync: ssh_sxfr %02x, ssh_sbcl %02x\n", sxfer, sbcl);
1455: #endif
1456: }
1457:
1458: #ifdef DEBUG
1459:
1460: #if SSH_TRACE_SIZE
1461: void
1462: ssh_dump_trace()
1463: {
1464: int i;
1465:
1466: printf("ssh trace: next index %d\n", ssh_trix);
1467: i = ssh_trix;
1468: do {
1469: printf("%3d: '%c' %02x %02x %02x\n", i, ssh_trbuf[i],
1470: ssh_trbuf[i + 1], ssh_trbuf[i + 2], ssh_trbuf[i + 3]);
1471: i = (i + 4) & (SSH_TRACE_SIZE - 1);
1472: } while (i != ssh_trix);
1473: }
1474: #endif
1475:
1476: void
1477: ssh_dump_acb(acb)
1478: struct ssh_acb *acb;
1479: {
1480: u_char *b = (u_char *) &acb->cmd;
1481: int i;
1482:
1483: #if SSH_TRACE_SIZE
1484: ssh_dump_trace();
1485: #endif
1486: printf("acb@%x ", acb);
1487: if (acb->xs == NULL) {
1488: printf("<unused>\n");
1489: return;
1490: }
1491: printf("(%d:%d) flags %2x clen %2d cmd ", acb->xs->sc_link->target,
1492: acb->xs->sc_link->lun, acb->flags, acb->clen);
1493: for (i = acb->clen; i; --i)
1494: printf(" %02x", *b++);
1495: printf("\n");
1496: printf(" xs: %08x data %8x:%04x ", acb->xs, acb->xs->data,
1497: acb->xs->datalen);
1498: printf("va %8x:%04x ", acb->iob_buf, acb->iob_len);
1499: printf("cur %8x:%04x\n", acb->iob_curbuf, acb->iob_curlen);
1500: }
1501:
1502: void
1503: ssh_dump(sc)
1504: struct ssh_softc *sc;
1505: {
1506: struct ssh_acb *acb;
1507: ssh_regmap_p rp = sc->sc_sshp;
1508: int s;
1509: int i;
1510:
1511: s = splbio();
1512: printf("%s@%x regs %x istat %x\n",
1513: sc->sc_dev.dv_xname, sc, rp, rp->ssh_istat);
1514: if (acb = TAILQ_FIRST(&sc->free_list)) {
1515: printf("Free list:\n");
1516: while (acb) {
1517: ssh_dump_acb(acb);
1518: acb = TAILQ_NEXT(acb, chain);
1519: }
1520: }
1521: if (acb = TAILQ_FIRST(&sc->ready_list)) {
1522: printf("Ready list:\n");
1523: while (acb) {
1524: ssh_dump_acb(acb);
1525: acb = TAILQ_NEXT(acb, chain);
1526: }
1527: }
1528: if (acb = TAILQ_FIRST(&sc->nexus_list)) {
1529: printf("Nexus list:\n");
1530: while (acb) {
1531: ssh_dump_acb(acb);
1532: acb = TAILQ_NEXT(acb, chain);
1533: }
1534: }
1535: if (sc->sc_nexus) {
1536: printf("Nexus:\n");
1537: ssh_dump_acb(sc->sc_nexus);
1538: }
1539: for (i = 0; i < 8; ++i) {
1540: if (sc->sc_tinfo[i].cmds > 2) {
1541: printf("tgt %d: cmds %d disc %d senses %d lubusy %x\n",
1542: i, sc->sc_tinfo[i].cmds,
1543: sc->sc_tinfo[i].dconns,
1544: sc->sc_tinfo[i].senses,
1545: sc->sc_tinfo[i].lubusy);
1546: }
1547: }
1548: splx(s);
1549: }
1550: #endif