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1.1 root 1: /*
2: * Copyright (c) 1982, 1986 Regents of the University of California.
3: * All rights reserved. The Berkeley software License Agreement
4: * specifies the terms and conditions for redistribution.
5: *
6: * @(#)rl.c 7.9 (Berkeley) 2/17/90
7: */
8:
9: #include "rl.h"
10: #if NRL > 0
11: /*
12: * UNIBUS RL02 disk driver
13: */
14: #include "machine/pte.h"
15:
16: #include "param.h"
17: #include "systm.h"
18: #include "dkstat.h"
19: #include "dkbad.h"
20: #include "ioctl.h"
21: #include "disklabel.h"
22: #include "buf.h"
23: #include "conf.h"
24: #include "user.h"
25: #include "map.h"
26: #include "vm.h"
27: #include "cmap.h"
28: #include "uio.h"
29: #include "kernel.h"
30: #include "syslog.h"
31:
32: #include "../vax/cpu.h"
33: #include "../vax/nexus.h"
34: #include "ubavar.h"
35: #include "ubareg.h"
36: #include "rlreg.h"
37:
38: /* Pending Controller items and statistics */
39: struct rl_softc {
40: int rl_softas; /* Attention sumary, (seeks pending) */
41: int rl_ndrive; /* Number of drives on controller */
42: int rl_wticks; /* Monitor time for function */
43: } rl_softc[NHL];
44:
45: /*
46: * State of controller from last transfer.
47: * Since only one transfer can be done at a time per
48: * controller, only allocate one for each controller.
49: */
50: struct rl_stat {
51: short rl_cyl[4]; /* Current cylinder for each drive */
52: short rl_dn; /* drive number currently transferring */
53: short rl_cylnhd; /* current cylinder and head of transfer */
54: u_short rl_bleft; /* bytes left to transfer */
55: u_short rl_bpart; /* bytes transferred */
56: } rl_stat[NHL];
57:
58: #define rlunit(dev) (minor(dev) >> 3)
59:
60: /* THIS SHOULD BE READ OFF THE PACK, PER DRIVE */
61: /* Last cylinder not used. Saved for Bad Sector File */
62: struct size {
63: daddr_t nblocks;
64: int cyloff;
65: } rl02_sizes[8] = {
66: 15884, 0, /* A=cyl 0 thru 397 */
67: 4520, 398, /* B=cyl 398 thru 510 */
68: -1, 0, /* C=cyl 0 thru 511 */
69: 4520, 398, /* D=cyl 398 thru 510 */
70: 0, 0, /* E= Not Defined */
71: 0, 0, /* F= Not Defined */
72: 20440, 0, /* G=cyl 0 thru 510 */
73: 0, 0, /* H= Not Defined */
74: };
75: /* END OF STUFF WHICH SHOULD BE READ IN PER DISK */
76:
77: int rlprobe(), rlslave(), rlattach(), rldgo(), rlintr();
78: struct uba_ctlr *rlminfo[NHL];
79: struct uba_device *rldinfo[NRL];
80: struct uba_device *rlip[NHL][4];
81:
82: /* RL02 driver structure */
83: u_short rlstd[] = { 0174400, 0 };
84: struct uba_driver hldriver =
85: { rlprobe, rlslave, rlattach, rldgo, rlstd, "rl", rldinfo, "hl", rlminfo };
86:
87: /* User table per controller */
88: struct buf rlutab[NRL];
89:
90: /* RL02 drive structure */
91: struct RL02 {
92: short nbpt; /* Number of 512 byte blocks/track */
93: short ntrak;
94: short nbpc; /* Number of 512 byte blocks/cylinder */
95: short ncyl;
96: short btrak; /* Number of bytes/track */
97: struct size *sizes;
98: } rl02 = {
99: 20, 2, 40, 512, 20*512, rl02_sizes /* rl02/DEC*/
100: };
101:
102: #define b_cylin b_resid /* Last seek as CYL<<1 | HD */
103:
104: int rlwstart, rlwatch(); /* Have started guardian */
105:
106: /* Check that controller exists */
107: /*ARGSUSED*/
108: rlprobe(reg)
109: caddr_t reg;
110: {
111: register int br, cvec;
112:
113: #ifdef lint
114: br = 0; cvec = br; br = cvec;
115: rlintr(0);
116: #endif
117: ((struct rldevice *)reg)->rlcs = RL_IE | RL_NOOP;
118: DELAY(10);
119: ((struct rldevice *)reg)->rlcs &= ~RL_IE;
120: return (sizeof (struct rldevice));
121: }
122:
123: rlslave(ui, reg)
124: struct uba_device *ui;
125: caddr_t reg;
126: {
127: register struct rldevice *rladdr = (struct rldevice *)reg;
128: short ctr = 0;
129:
130: /*
131: * DEC reports that:
132: * For some unknown reason the RL02 (seems to be only drive 1)
133: * does not return a valid drive status the first time that a
134: * GET STATUS request is issued for the drive, in fact it can
135: * take up to three or more GET STATUS requests to obtain the
136: * correct status.
137: * In order to overcome this, the driver has been modified to
138: * issue a GET STATUS request and validate the drive status
139: * returned. If a valid status is not returned after eight
140: * attempts, then an error message is printed.
141: */
142: do {
143: rladdr->rlda.getstat = RL_RESET;
144: rladdr->rlcs = (ui->ui_slave <<8) | RL_GETSTAT; /* Get status*/
145: rlwait(rladdr);
146: } while ((rladdr->rlcs & (RL_CRDY|RL_ERR)) != RL_CRDY && ++ctr < 8);
147:
148: if ((rladdr->rlcs & RL_DE) || (ctr >= 8))
149: return (0);
150: if ((rladdr->rlmp.getstat & RLMP_DT) == 0 ) {
151: printf("rl%d: rl01's not supported\n", ui->ui_slave);
152: return(0);
153: }
154: return (1);
155: }
156:
157: rlattach(ui)
158: register struct uba_device *ui;
159: {
160: register struct rldevice *rladdr;
161:
162: if (rlwstart == 0) {
163: timeout(rlwatch, (caddr_t)0, hz);
164: rlwstart++;
165: }
166: /* Initialize iostat values */
167: if (ui->ui_dk >= 0)
168: dk_wpms[ui->ui_dk] = 256016; /* 16bit transfer time? */
169: rlip[ui->ui_ctlr][ui->ui_slave] = ui;
170: rl_softc[ui->ui_ctlr].rl_ndrive++;
171: rladdr = (struct rldevice *)ui->ui_addr;
172: /* reset controller */
173: rladdr->rlda.getstat = RL_RESET; /* SHOULD BE REPEATED? */
174: rladdr->rlcs = (ui->ui_slave << 8) | RL_GETSTAT; /* Reset DE bit */
175: rlwait(rladdr);
176: /* determine disk posistion */
177: rladdr->rlcs = (ui->ui_slave << 8) | RL_RHDR;
178: rlwait(rladdr);
179: /* save disk drive posistion */
180: rl_stat[ui->ui_ctlr].rl_cyl[ui->ui_slave] =
181: (rladdr->rlmp.readhdr & 0177700) >> 6;
182: rl_stat[ui->ui_ctlr].rl_dn = -1;
183: }
184:
185: rlopen(dev)
186: dev_t dev;
187: {
188: register int unit = rlunit(dev);
189: register struct uba_device *ui;
190:
191: if (unit >= NRL || (ui = rldinfo[unit]) == 0 || ui->ui_alive == 0)
192: return (ENXIO);
193: return (0);
194: }
195:
196: rlstrategy(bp)
197: register struct buf *bp;
198: {
199: register struct uba_device *ui;
200: register int drive;
201: register struct buf *dp;
202: int partition = minor(bp->b_dev) & 07, s;
203: long bn, sz;
204:
205: sz = (bp->b_bcount+511) >> 9;
206: drive = rlunit(bp->b_dev);
207: if (drive >= NRL) {
208: bp->b_error = ENXIO;
209: goto bad;
210: }
211: ui = rldinfo[drive];
212: if (ui == 0 || ui->ui_alive == 0) {
213: bp->b_error = ENXIO;
214: goto bad;
215: }
216: if (bp->b_blkno < 0 ||
217: (bn = bp->b_blkno)+sz > rl02.sizes[partition].nblocks) {
218: if (bp->b_blkno == rl02.sizes[partition].nblocks) {
219: bp->b_resid = bp->b_bcount;
220: goto done;
221: }
222: bp->b_error = EINVAL;
223: goto bad;
224: }
225: /* bn is in 512 byte block size */
226: bp->b_cylin = bn/rl02.nbpc + rl02.sizes[partition].cyloff;
227: s = spl5();
228: dp = &rlutab[ui->ui_unit];
229: disksort(dp, bp);
230: if (dp->b_active == 0) {
231: rlustart(ui);
232: bp = &ui->ui_mi->um_tab;
233: if (bp->b_actf && bp->b_active == 0)
234: rlstart(ui->ui_mi);
235: }
236: splx(s);
237: return;
238:
239: bad:
240: bp->b_flags |= B_ERROR;
241: done:
242: iodone(bp);
243: return;
244: }
245:
246: /*
247: * Unit start routine.
248: * Seek the drive to be where the data is
249: * and then generate another interrupt
250: * to actually start the transfer.
251: */
252: rlustart(ui)
253: register struct uba_device *ui;
254: {
255: register struct buf *bp, *dp;
256: register struct uba_ctlr *um;
257: register struct rldevice *rladdr;
258: daddr_t bn;
259: short hd, diff;
260:
261: if (ui == 0)
262: return;
263: um = ui->ui_mi;
264: dk_busy &= ~(1 << ui->ui_dk);
265: dp = &rlutab[ui->ui_unit];
266: if ((bp = dp->b_actf) == NULL)
267: return;
268: /*
269: * If the controller is active, just remember
270: * that this device has to be positioned...
271: */
272: if (um->um_tab.b_active) {
273: rl_softc[um->um_ctlr].rl_softas |= 1<<ui->ui_slave;
274: return;
275: }
276: /*
277: * If we have already positioned this drive,
278: * then just put it on the ready queue.
279: */
280: if (dp->b_active)
281: goto done;
282: dp->b_active = 1; /* positioning drive */
283: rladdr = (struct rldevice *)um->um_addr;
284:
285: /*
286: * Figure out where this transfer is going to
287: * and see if we are seeked correctly.
288: */
289: bn = bp->b_blkno; /* Block # desired */
290: /*
291: * Map 512 byte logical disk blocks
292: * to 256 byte sectors (rl02's are stupid).
293: */
294: hd = (bn / rl02.nbpt) & 1; /* Get head required */
295: diff = (rl_stat[um->um_ctlr].rl_cyl[ui->ui_slave] >> 1) - bp->b_cylin;
296: if ( diff == 0 && (rl_stat[um->um_ctlr].rl_cyl[ui->ui_slave] & 1) == hd)
297: goto done; /* on cylinder and head */
298: /*
299: * Not at correct position.
300: */
301: rl_stat[um->um_ctlr].rl_cyl[ui->ui_slave] = (bp->b_cylin << 1) | hd;
302: if (diff < 0)
303: rladdr->rlda.seek = -diff << 7 | RLDA_HGH | hd << 4;
304: else
305: rladdr->rlda.seek = diff << 7 | RLDA_LOW | hd << 4;
306: rladdr->rlcs = (ui->ui_slave << 8) | RL_SEEK;
307:
308: /*
309: * Mark unit busy for iostat.
310: */
311: if (ui->ui_dk >= 0) {
312: dk_busy |= 1<<ui->ui_dk;
313: dk_seek[ui->ui_dk]++;
314: }
315: rlwait(rladdr);
316: done:
317: /*
318: * Device is ready to go.
319: * Put it on the ready queue for the controller
320: * (unless its already there.)
321: */
322: if (dp->b_active != 2) {
323: dp->b_forw = NULL;
324: if (um->um_tab.b_actf == NULL)
325: um->um_tab.b_actf = dp;
326: else
327: um->um_tab.b_actl->b_forw = dp;
328: um->um_tab.b_actl = dp;
329: dp->b_active = 2; /* Request on ready queue */
330: }
331: }
332:
333: /*
334: * Start up a transfer on a drive.
335: */
336: rlstart(um)
337: register struct uba_ctlr *um;
338: {
339: register struct buf *bp, *dp;
340: register struct uba_device *ui;
341: register struct rldevice *rladdr;
342: register struct rl_stat *st = &rl_stat[um->um_ctlr];
343: daddr_t bn;
344: short sn, cyl, cmd;
345:
346: loop:
347: if ((dp = um->um_tab.b_actf) == NULL) {
348: st->rl_dn = -1;
349: st->rl_cylnhd = 0;
350: st->rl_bleft = 0;
351: st->rl_bpart = 0;
352: return;
353: }
354: if ((bp = dp->b_actf) == NULL) {
355: um->um_tab.b_actf = dp->b_forw;
356: goto loop;
357: }
358: /*
359: * Mark controller busy, and
360: * determine destination.
361: */
362: um->um_tab.b_active++;
363: ui = rldinfo[rlunit(bp->b_dev)]; /* Controller */
364: bn = bp->b_blkno; /* 512 byte Block number */
365: cyl = bp->b_cylin << 1; /* Cylinder */
366: cyl |= (bn / rl02.nbpt) & 1; /* Get head required */
367: sn = (bn % rl02.nbpt) << 1; /* Sector number */
368: rladdr = (struct rldevice *)ui->ui_addr;
369: rlwait(rladdr);
370: rladdr->rlda.rw = cyl<<6 | sn;
371: /* save away current transfers drive status */
372: st->rl_dn = ui->ui_slave;
373: st->rl_cylnhd = cyl;
374: st->rl_bleft = bp->b_bcount;
375: st->rl_bpart = rl02.btrak - (sn * NRLBPSC);
376: /*
377: * RL02 must seek between cylinders and between tracks,
378: * determine maximum data transfer at this time.
379: */
380: if (st->rl_bleft < st->rl_bpart)
381: st->rl_bpart = st->rl_bleft;
382: rladdr->rlmp.rw = -(st->rl_bpart >> 1);
383: if (bp->b_flags & B_READ)
384: cmd = RL_IE | RL_READ | (ui->ui_slave << 8);
385: else
386: cmd = RL_IE | RL_WRITE | (ui->ui_slave << 8);
387: um->um_cmd = cmd;
388: (void) ubago(ui);
389: }
390:
391: rldgo(um)
392: register struct uba_ctlr *um;
393: {
394: register struct rldevice *rladdr = (struct rldevice *)um->um_addr;
395:
396: rladdr->rlba = um->um_ubinfo;
397: rladdr->rlcs = um->um_cmd|((um->um_ubinfo>>12)&RL_BAE);
398: }
399:
400: /*
401: * Handle a disk interrupt.
402: */
403: rlintr(rl21)
404: register rl21;
405: {
406: register struct buf *bp, *dp;
407: register struct uba_ctlr *um = rlminfo[rl21];
408: register struct uba_device *ui;
409: register struct rldevice *rladdr = (struct rldevice *)um->um_addr;
410: register unit;
411: struct rl_softc *rl = &rl_softc[um->um_ctlr];
412: struct rl_stat *st = &rl_stat[um->um_ctlr];
413: int as = rl->rl_softas, status;
414:
415: rl->rl_wticks = 0;
416: rl->rl_softas = 0;
417: dp = um->um_tab.b_actf;
418: bp = dp->b_actf;
419: ui = rldinfo[rlunit(bp->b_dev)];
420: dk_busy &= ~(1 << ui->ui_dk);
421:
422: /*
423: * Check for and process errors on
424: * either the drive or the controller.
425: */
426: if (rladdr->rlcs & RL_ERR) {
427: u_short err;
428: rlwait(rladdr);
429: err = rladdr->rlcs;
430: /* get staus and reset controller */
431: rladdr->rlda.getstat = RL_GSTAT;
432: rladdr->rlcs = (ui->ui_slave << 8) | RL_GETSTAT;
433: rlwait(rladdr);
434: status = rladdr->rlmp.getstat;
435: /* reset drive */
436: rladdr->rlda.getstat = RL_RESET;
437: rladdr->rlcs = (ui->ui_slave <<8) | RL_GETSTAT; /* Get status*/
438: rlwait(rladdr);
439: if ((status & RLMP_WL) == RLMP_WL) {
440: /*
441: * Give up on write protected devices
442: * immediately.
443: */
444: printf("rl%d: write protected\n", rlunit(bp->b_dev));
445: bp->b_flags |= B_ERROR;
446: } else if (++um->um_tab.b_errcnt > 10) {
447: /*
448: * After 10 retries give up.
449: */
450: diskerr(bp, "rl", "hard error", LOG_PRINTF, -1,
451: (struct disklabel *)0);
452: printf(" cs=%b mp=%b\n", err, RLCS_BITS,
453: status, RLER_BITS);
454: bp->b_flags |= B_ERROR;
455: } else
456: um->um_tab.b_active = 0; /* force retry */
457: /* determine disk position */
458: rladdr->rlcs = (ui->ui_slave << 8) | RL_RHDR;
459: rlwait(rladdr);
460: /* save disk drive position */
461: st->rl_cyl[ui->ui_slave] =
462: (rladdr->rlmp.readhdr & 0177700) >> 6;
463: }
464: /*
465: * If still ``active'', then don't need any more retries.
466: */
467: if (um->um_tab.b_active) {
468: /* RL02 check if more data from previous request */
469: if ((bp->b_flags & B_ERROR) == 0 &&
470: (int)(st->rl_bleft -= st->rl_bpart) > 0) {
471: /*
472: * The following code was modeled from the rk07
473: * driver when an ECC error occured. It has to
474: * fix the bits then restart the transfer which is
475: * what we have to do (restart transfer).
476: */
477: int reg, npf, o, cmd, ubaddr, diff, head;
478:
479: /* seek to next head/track */
480: /* increment head and/or cylinder */
481: st->rl_cylnhd++;
482: diff = (st->rl_cyl[ui->ui_slave] >> 1) -
483: (st->rl_cylnhd >> 1);
484: st->rl_cyl[ui->ui_slave] = st->rl_cylnhd;
485: head = st->rl_cylnhd & 1;
486: rlwait(rladdr);
487: if (diff < 0)
488: rladdr->rlda.seek =
489: -diff << 7 | RLDA_HGH | head << 4;
490: else
491: rladdr->rlda.seek =
492: diff << 7 | RLDA_LOW | head << 4;
493: rladdr->rlcs = (ui->ui_slave << 8) | RL_SEEK;
494: npf = btop( bp->b_bcount - st->rl_bleft );
495: reg = btop(UBAI_ADDR(um->um_ubinfo)) + npf;
496: o = (int)bp->b_un.b_addr & PGOFSET;
497: ubapurge(um);
498: um->um_tab.b_active++;
499: rlwait(rladdr);
500: rladdr->rlda.rw = st->rl_cylnhd << 6;
501: if (st->rl_bleft < (st->rl_bpart = rl02.btrak))
502: st->rl_bpart = st->rl_bleft;
503: rladdr->rlmp.rw = -(st->rl_bpart >> 1);
504: cmd = (bp->b_flags&B_READ ? RL_READ : RL_WRITE) |
505: RL_IE | (ui->ui_slave << 8);
506: ubaddr = (int)ptob(reg) + o;
507: cmd |= ((ubaddr >> 12) & RL_BAE);
508: rladdr->rlba = ubaddr;
509: rladdr->rlcs = cmd;
510: return;
511: }
512: um->um_tab.b_active = 0;
513: um->um_tab.b_errcnt = 0;
514: dp->b_active = 0;
515: dp->b_errcnt = 0;
516: /* "b_resid" words remaining after error */
517: bp->b_resid = st->rl_bleft;
518: um->um_tab.b_actf = dp->b_forw;
519: dp->b_actf = bp->av_forw;
520: st->rl_dn = -1;
521: st->rl_bpart = st->rl_bleft = 0;
522: iodone(bp);
523: /*
524: * If this unit has more work to do,
525: * then start it up right away.
526: */
527: if (dp->b_actf)
528: rlustart(ui);
529: as &= ~(1<<ui->ui_slave);
530: } else
531: as |= (1<<ui->ui_slave);
532: ubadone(um);
533: /* reset state info */
534: st->rl_dn = -1;
535: st->rl_cylnhd = st->rl_bpart = st->rl_bleft = 0;
536: /*
537: * Process other units which need attention.
538: * For each unit which needs attention, call
539: * the unit start routine to place the slave
540: * on the controller device queue.
541: */
542: while (unit = ffs((long)as)) {
543: unit--; /* was 1 origin */
544: as &= ~(1<<unit);
545: rlustart(rlip[rl21][unit]);
546: }
547: /*
548: * If the controller is not transferring, but
549: * there are devices ready to transfer, start
550: * the controller.
551: */
552: if (um->um_tab.b_actf && um->um_tab.b_active == 0)
553: rlstart(um);
554: }
555:
556: rlwait(rladdr)
557: register struct rldevice *rladdr;
558: {
559:
560: while ((rladdr->rlcs & RL_CRDY) == 0)
561: ;
562: }
563:
564: /*
565: * Reset driver after UBA init.
566: * Cancel software state of all pending transfers
567: * and restart all units and the controller.
568: */
569: rlreset(uban)
570: int uban;
571: {
572: register struct uba_ctlr *um;
573: register struct uba_device *ui;
574: register struct rldevice *rladdr;
575: register struct rl_stat *st;
576: register int rl21, unit;
577:
578: for (rl21 = 0; rl21 < NHL; rl21++) {
579: if ((um = rlminfo[rl21]) == 0 || um->um_ubanum != uban ||
580: um->um_alive == 0)
581: continue;
582: printf(" hl%d", rl21);
583: rladdr = (struct rldevice *)um->um_addr;
584: st = &rl_stat[rl21];
585: um->um_tab.b_active = 0;
586: um->um_tab.b_actf = um->um_tab.b_actl = 0;
587: if (um->um_ubinfo) {
588: printf("<%d>", (um->um_ubinfo>>28)&0xf);
589: um->um_ubinfo = 0;
590: }
591: /* reset controller */
592: st->rl_dn = -1;
593: st->rl_cylnhd = 0;
594: st->rl_bleft = 0;
595: st->rl_bpart = 0;
596: rlwait(rladdr);
597: for (unit = 0; unit < NRL; unit++) {
598: rladdr->rlcs = (unit << 8) | RL_GETSTAT;
599: rlwait(rladdr);
600: /* Determine disk posistion */
601: rladdr->rlcs = (unit << 8) | RL_RHDR;
602: rlwait(rladdr);
603: /* save disk drive posistion */
604: st->rl_cyl[unit] =
605: (rladdr->rlmp.readhdr & 0177700) >> 6;
606: if ((ui = rldinfo[unit]) == 0)
607: continue;
608: if (ui->ui_alive == 0 || ui->ui_mi != um)
609: continue;
610: rlutab[unit].b_active = 0;
611: rlustart(ui);
612: }
613: rlstart(um);
614: }
615: }
616:
617: /*
618: * Wake up every second and if an interrupt is pending
619: * but nothing has happened increment a counter.
620: * If nothing happens for 20 seconds, reset the UNIBUS
621: * and begin anew.
622: */
623: rlwatch()
624: {
625: register struct uba_ctlr *um;
626: register rl21, unit;
627: register struct rl_softc *rl;
628:
629: timeout(rlwatch, (caddr_t)0, hz);
630: for (rl21 = 0; rl21 < NHL; rl21++) {
631: um = rlminfo[rl21];
632: if (um == 0 || um->um_alive == 0)
633: continue;
634: rl = &rl_softc[rl21];
635: if (um->um_tab.b_active == 0) {
636: for (unit = 0; unit < NRL; unit++)
637: if (rlutab[unit].b_active &&
638: rldinfo[unit]->ui_mi == um)
639: goto active;
640: rl->rl_wticks = 0;
641: continue;
642: }
643: active:
644: rl->rl_wticks++;
645: if (rl->rl_wticks >= 20) {
646: rl->rl_wticks = 0;
647: printf("hl%d: lost interrupt\n", rl21);
648: ubareset(um->um_ubanum);
649: }
650: }
651: }
652:
653: /*ARGSUSED*/
654: rldump(dev)
655: dev_t dev;
656: {
657:
658: /* don't think there is room on swap for it anyway. */
659: }
660:
661: rlsize(dev)
662: dev_t dev;
663: {
664: register int unit = rlunit(dev);
665: register struct uba_device *ui;
666:
667: if (unit >= NRL || (ui = rldinfo[unit]) == 0 || ui->ui_alive == 0)
668: return (-1);
669: return (rl02.sizes[minor(dev) & 07].nblocks);
670: }
671: #endif
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