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207438d8 C |
1 | /* rl.c 4.1 83/02/08 */ |
2 | ||
3 | #include "rl.h" | |
4 | #if NHL > 0 | |
5 | /* | |
6 | * UNIBUS RL02 disk driver | |
7 | * (not yet converted to 4.1c) | |
8 | */ | |
9 | ||
10 | #include "../h/param.h" | |
11 | #include "../h/systm.h" | |
12 | #include "../h/cpu.h" | |
13 | #include "../h/nexus.h" | |
14 | #include "../h/dk.h" | |
15 | #include "../h/buf.h" | |
16 | #include "../h/conf.h" | |
17 | #include "../h/dir.h" | |
18 | #include "../h/user.h" | |
19 | #include "../h/map.h" | |
20 | #include "../h/pte.h" | |
21 | #include "../h/mtpr.h" | |
22 | #include "../h/vm.h" | |
23 | #include "../h/ubavar.h" | |
24 | #include "../h/ubareg.h" | |
25 | #include "../h/cmap.h" | |
26 | ||
27 | #include "../h/rlreg.h" | |
28 | ||
29 | /* Pending Controller items and statistics */ | |
30 | struct rl_softc { | |
31 | int rl_softas; /* Attention sumary, (seeks pending) */ | |
32 | int rl_ndrive; /* Number of drives on controller */ | |
33 | int rl_wticks; /* Monitor time for function */ | |
34 | } rl_softc[NHL]; | |
35 | ||
36 | /* | |
37 | * this struct is used to keep the state of the controller for the last | |
38 | * transfer done. Since only one transfer can be done at a time per | |
39 | * controller, only allocate one for each controller. | |
40 | */ | |
41 | struct rl_stat { | |
42 | short rl_cyl[4]; /* Current cylinder for each drive */ | |
43 | short rl_dn; /* drive number currently transferring */ | |
44 | short rl_cylnhd; /* current cylinder and head of transfer */ | |
45 | u_short rl_bleft; /* bytes left to transfer */ | |
46 | u_short rl_bpart; /* bytes transferred */ | |
47 | } rl_stat[NHL]; | |
48 | ||
49 | /* THIS SHOULD BE READ OFF THE PACK, PER DRIVE */ | |
50 | struct size { | |
51 | daddr_t nblocks; | |
52 | int cyloff; | |
53 | } rl02_sizes[8] = { | |
54 | 14440, 0, /* A=cyl 0 thru 360 */ | |
55 | 6040, 361, /* B=cyl 361 thru 511 */ | |
56 | 20480, 0, /* C=cyl 0 thru 511 */ | |
57 | 0, 0, /* D= Not Defined */ | |
58 | 0, 0, /* E= Not Defined */ | |
59 | 0, 0, /* F= Not Defined */ | |
60 | 0, 0, /* G= Not Defined */ | |
61 | 0, 0, /* H= Not Defined */ | |
62 | }; | |
63 | /* END OF STUFF WHICH SHOULD BE READ IN PER DISK */ | |
64 | ||
65 | int rlprobe(), rlslave(), rlattach(), rldgo(), rlintr(); | |
66 | struct uba_ctlr *rlminfo[NHL]; | |
67 | struct uba_device *rldinfo[NRL]; | |
68 | struct uba_device *rlip[NHL][4]; | |
69 | ||
70 | /* RL02 driver structure */ | |
71 | u_short rlstd[] = { 0174400 }; | |
72 | struct uba_driver hldriver = | |
73 | { rlprobe, rlslave, rlattach, rldgo, rlstd, "rl", rldinfo, "hl", rlminfo }; | |
74 | ||
75 | /* User table per controller */ | |
76 | struct buf rlutab[NRL]; | |
77 | ||
78 | /* RL02 drive structure */ | |
79 | struct RL02 { | |
80 | short nbpt; /* Number of 512 byte blocks/track */ | |
81 | short ntrak; | |
82 | short nbpc; /* Number of 512 byte blocks/cylinder */ | |
83 | short ncyl; | |
84 | short btrak; /* Number of bytes/track */ | |
85 | struct size *sizes; | |
86 | } rl02 = { | |
87 | 20, 2, 40, 512, 20*512, rl02_sizes /* rl02/DEC*/ | |
88 | }; | |
89 | ||
90 | struct buf rrlbuf[NRL]; | |
91 | ||
92 | #define b_cylin b_resid /* Last seek as CYL<<1 | HD */ | |
93 | ||
94 | #ifdef INTRLVE | |
95 | daddr_t dkblock(); | |
96 | #endif | |
97 | ||
98 | int rlwstart, rlwatch(); /* Have started guardian */ | |
99 | ||
100 | /* Check that controller exists */ | |
101 | /*ARGSUSED*/ | |
102 | rlprobe(reg) | |
103 | caddr_t reg; | |
104 | { | |
105 | register int br, cvec; | |
106 | ||
107 | #ifdef lint | |
108 | br = 0; cvec = br; br = cvec; | |
109 | #endif | |
110 | ((struct rldevice *)reg)->rlcs = RL_IE | RL_NOOP; /* Enable intrpt */ | |
111 | DELAY(10); /* Ensure interrupt takes place (10 microsec ) */ | |
112 | ((struct rldevice *)reg)->rlcs &= ~RL_IE; /* Disable intrpt */ | |
113 | return (1); | |
114 | } | |
115 | ||
116 | /* Check that drive exists and is functional*/ | |
117 | rlslave(ui, reg) | |
118 | struct uba_device *ui; | |
119 | caddr_t reg; | |
120 | { | |
121 | register struct rldevice *rladdr = (struct rldevice *)reg; | |
122 | short ctr = 0; | |
123 | ||
124 | /* | |
125 | * DEC reports that: | |
126 | * For some unknown reason the RL02 (seems to be only drive 1) | |
127 | * does not return a valid drive status the first time that a | |
128 | * GET STATUS request is issued for the drive, in fact it can | |
129 | * take up to three or more GET STATUS requests to obtain the | |
130 | * correct status. | |
131 | * In order to overcome this, the driver has been modified to | |
132 | * issue a GET STATUS request and validate the drive status | |
133 | * returned. If a valid status is not returned after eight | |
134 | * attempts, then an error message is printed. | |
135 | */ | |
136 | do { | |
137 | rladdr->rlda.getstat = RL_RESET; | |
138 | rladdr->rlcs = (ui->ui_slave <<8) | RL_GETSTAT; /* Get status*/ | |
139 | rlwait(rladdr); | |
140 | } while( (rladdr->rlmp.getstat&RLMP_STATUS) != RLMP_STATOK && ++ctr<8 ); | |
141 | ||
142 | ||
143 | if ((rladdr->rlcs & RL_DE) || (ctr >= 8)) | |
144 | return (0); /* Error return */ | |
145 | if ((rladdr->rlmp.getstat & RLMP_DT) == 0 ) { /* NO RL01'S */ | |
146 | printf("rl01 drives not supported (drive %d)\n", ui->ui_slave ); | |
147 | return(0); | |
148 | } | |
149 | return (1); | |
150 | } | |
151 | ||
152 | /* Initialize controller */ | |
153 | rlattach(ui) | |
154 | register struct uba_device *ui; | |
155 | { | |
156 | register struct rldevice *rladdr; | |
157 | ||
158 | if (rlwstart == 0) { | |
159 | timeout(rlwatch, (caddr_t)0, hz); /* Watch for lost intr */ | |
160 | rlwstart++; | |
161 | } | |
162 | /* Initialize iostat values */ | |
163 | if (ui->ui_dk >= 0) | |
164 | dk_mspw[ui->ui_dk] = .000003906; /* 16bit transfer time? */ | |
165 | rlip[ui->ui_ctlr][ui->ui_slave] = ui; | |
166 | rl_softc[ui->ui_ctlr].rl_ndrive++; /* increment device/ctrl */ | |
167 | rladdr = (struct rldevice *)ui->ui_addr; | |
168 | ||
169 | /* reset controller */ | |
170 | rladdr->rlda.getstat = RL_RESET; /* SHOULD BE REPEATED? */ | |
171 | rladdr->rlcs = (ui->ui_slave << 8) | RL_GETSTAT; /* Reset DE bit */ | |
172 | rlwait(rladdr); | |
173 | ||
174 | /* Determine disk posistion */ | |
175 | rladdr->rlcs = (ui->ui_slave << 8) | RL_RHDR; | |
176 | rlwait(rladdr); | |
177 | ||
178 | /* save disk drive posistion */ | |
179 | rl_stat[ui->ui_ctlr].rl_cyl[ui->ui_slave] = | |
180 | (rladdr->rlmp.readhdr & 0177700) >> 6; | |
181 | rl_stat[ui->ui_ctlr].rl_dn = -1; | |
182 | } | |
183 | ||
184 | rlstrategy(bp) | |
185 | register struct buf *bp; | |
186 | { | |
187 | register struct uba_device *ui; | |
188 | register int drive; | |
189 | register struct buf *dp; | |
190 | int partition = minor(bp->b_dev) & 07; | |
191 | long bn, sz; | |
192 | ||
193 | sz = (bp->b_bcount+511) >> 9; /* Blocks to transfer */ | |
194 | ||
195 | drive = dkunit(bp); /* Drive number */ | |
196 | if (drive >= NRL) | |
197 | goto bad; | |
198 | ui = rldinfo[drive]; /* Controller uba_device */ | |
199 | if (ui == 0 || ui->ui_alive == 0) | |
200 | goto bad; | |
201 | if (bp->b_blkno < 0 || | |
202 | (bn = dkblock(bp))+sz > rl02.sizes[partition].nblocks) | |
203 | goto bad; | |
204 | ||
205 | /* bn is in 512 byte block size */ | |
206 | bp->b_cylin = bn/rl02.nbpc + rl02.sizes[partition].cyloff; | |
207 | (void) spl5(); | |
208 | dp = &rlutab[ui->ui_unit]; | |
209 | disksort(dp, bp); | |
210 | if (dp->b_active == 0) { | |
211 | (void) rlustart(ui); | |
212 | bp = &ui->ui_mi->um_tab; | |
213 | if (bp->b_actf && bp->b_active == 0) | |
214 | (void) rlstart(ui->ui_mi); | |
215 | } | |
216 | (void) spl0(); | |
217 | return; | |
218 | ||
219 | bad: | |
220 | bp->b_flags |= B_ERROR; | |
221 | iodone(bp); | |
222 | return; | |
223 | } | |
224 | ||
225 | /* | |
226 | * Unit start routine. | |
227 | * Seek the drive to be where the data is | |
228 | * and then generate another interrupt | |
229 | * to actually start the transfer. | |
230 | */ | |
231 | rlustart(ui) | |
232 | register struct uba_device *ui; | |
233 | { | |
234 | register struct buf *bp, *dp; | |
235 | register struct uba_ctlr *um; | |
236 | register struct rldevice *rladdr; | |
237 | daddr_t bn; | |
238 | short cyl, sn, hd, diff; | |
239 | ||
240 | if (ui == 0) | |
241 | return (0); | |
242 | um = ui->ui_mi; | |
243 | dk_busy &= ~(1<<ui->ui_dk); /* Kernel define, drives busy */ | |
244 | dp = &rlutab[ui->ui_unit]; | |
245 | if ((bp = dp->b_actf) == NULL) | |
246 | goto out; | |
247 | /* | |
248 | * If the controller is active, just remember | |
249 | * that this device has to be positioned... | |
250 | */ | |
251 | if (um->um_tab.b_active) { | |
252 | rl_softc[um->um_ctlr].rl_softas |= 1<<ui->ui_slave; | |
253 | return (0); | |
254 | } | |
255 | /* | |
256 | * If we have already positioned this drive, | |
257 | * then just put it on the ready queue. | |
258 | */ | |
259 | if (dp->b_active) | |
260 | goto done; | |
261 | dp->b_active = 1; /* Posistioning drive */ | |
262 | rladdr = (struct rldevice *)um->um_addr; | |
263 | ||
264 | /* | |
265 | * Figure out where this transfer is going to | |
266 | * and see if we are seeked correctly. | |
267 | */ | |
268 | bn = dkblock(bp); /* Block # desired */ | |
269 | /* | |
270 | * these next two look funky... but we need to map | |
271 | * 512 byte logical disk blocks to 256 byte sectors. | |
272 | * (rl02's are stupid). | |
273 | */ | |
274 | sn = (bn % rl02.nbpt) << 1; /* Sector # desired */ | |
275 | hd = (bn / rl02.nbpt) & 1; /* Get head required */ | |
276 | ||
277 | diff = (rl_stat[um->um_ctlr].rl_cyl[ui->ui_slave] >> 1) - bp->b_cylin; | |
278 | if ( diff == 0 && (rl_stat[um->um_ctlr].rl_cyl[ui->ui_slave] & 1) == hd) | |
279 | goto done; /* on cylinder and head */ | |
280 | ||
281 | search: | |
282 | /* | |
283 | * Not at correct position. | |
284 | */ | |
285 | ||
286 | rl_stat[um->um_ctlr].rl_cyl[ui->ui_slave] = (bp->b_cylin << 1) | hd; | |
287 | ||
288 | if (diff < 0) | |
289 | rladdr->rlda.seek = -diff << 7 | RLDA_HGH | hd << 4; | |
290 | else | |
291 | rladdr->rlda.seek = diff << 7 | RLDA_LOW | hd << 4; | |
292 | rladdr->rlcs = (ui->ui_slave << 8) | RL_SEEK; | |
293 | ||
294 | /* | |
295 | * Mark unit busy for iostat. | |
296 | */ | |
297 | if (ui->ui_dk >= 0) { | |
298 | dk_busy |= 1<<ui->ui_dk; | |
299 | dk_seek[ui->ui_dk]++; | |
300 | } | |
301 | rlwait( rladdr ); | |
302 | ||
303 | /* | |
304 | * fall through since we are now at the correct cylinder | |
305 | */ | |
306 | done: | |
307 | /* | |
308 | * Device is ready to go. | |
309 | * Put it on the ready queue for the controller | |
310 | * (unless its already there.) | |
311 | */ | |
312 | if (dp->b_active != 2) { | |
313 | dp->b_forw = NULL; | |
314 | if (um->um_tab.b_actf == NULL) | |
315 | um->um_tab.b_actf = dp; | |
316 | else | |
317 | um->um_tab.b_actl->b_forw = dp; | |
318 | um->um_tab.b_actl = dp; | |
319 | dp->b_active = 2; /* Request on ready queue */ | |
320 | } | |
321 | out: | |
322 | return (0); | |
323 | } | |
324 | ||
325 | /* | |
326 | * Start up a transfer on a drive. | |
327 | */ | |
328 | rlstart(um) | |
329 | register struct uba_ctlr *um; | |
330 | { | |
331 | register struct buf *bp, *dp; | |
332 | register struct uba_device *ui; | |
333 | register struct rldevice *rladdr; | |
334 | register struct rl_stat *st = &rl_stat[um->um_ctlr]; | |
335 | daddr_t bn; | |
336 | short sn, cyl, cmd; | |
337 | ||
338 | loop: | |
339 | /* | |
340 | * Pull a request off the controller queue | |
341 | */ | |
342 | if ((dp = um->um_tab.b_actf) == NULL) { | |
343 | st->rl_dn = -1; | |
344 | st->rl_cylnhd = 0; | |
345 | st->rl_bleft = 0; | |
346 | st->rl_bpart = 0; | |
347 | return (0); | |
348 | } | |
349 | if ((bp = dp->b_actf) == NULL) { | |
350 | um->um_tab.b_actf = dp->b_forw; | |
351 | goto loop; | |
352 | } | |
353 | /* | |
354 | * Mark controller busy, and | |
355 | * determine destinationst. | |
356 | */ | |
357 | um->um_tab.b_active++; | |
358 | ui = rldinfo[dkunit(bp)]; /* Controller */ | |
359 | bn = dkblock(bp); /* 512 byte Block number */ | |
360 | cyl = bp->b_cylin << 1; /* Cylinder */ | |
361 | cyl |= (bn / rl02.nbpt) & 1; /* Get head required */ | |
362 | sn = (bn % rl02.nbpt) << 1; /* Sector number */ | |
363 | rladdr = (struct rldevice *)ui->ui_addr; | |
364 | ||
365 | /* | |
366 | * Check that controller is ready | |
367 | */ | |
368 | rlwait( rladdr ); | |
369 | ||
370 | /* | |
371 | * Setup for the transfer, and get in the | |
372 | * UNIBUS adaptor queue. | |
373 | */ | |
374 | rladdr->rlda.rw = cyl<<6 | sn; | |
375 | ||
376 | /* save away current transfers drive status */ | |
377 | st->rl_dn = ui->ui_slave; | |
378 | st->rl_cylnhd = cyl; | |
379 | st->rl_bleft = bp->b_bcount; | |
380 | st->rl_bpart = rl02.btrak - (sn * NRLBPSC); | |
381 | ||
382 | /* RL02 must seek between cylinders and between tracks */ | |
383 | /* Determine maximum data transfer at this time */ | |
384 | if( st->rl_bleft < st->rl_bpart) | |
385 | st->rl_bpart = st->rl_bleft; | |
386 | ||
387 | rladdr->rlmp.rw = -(st->rl_bpart >> 1); | |
388 | if (bp->b_flags & B_READ) | |
389 | cmd = RL_IE | RL_READ | (ui->ui_slave << 8); | |
390 | else | |
391 | cmd = RL_IE | RL_WRITE | (ui->ui_slave << 8); | |
392 | um->um_cmd = cmd; | |
393 | (void) ubago(ui); | |
394 | return (1); | |
395 | } | |
396 | ||
397 | /* | |
398 | * Now all ready to go, stuff the registers. | |
399 | */ | |
400 | rldgo(um) | |
401 | register struct uba_ctlr *um; | |
402 | { | |
403 | register struct rldevice *rladdr = (struct rldevice *)um->um_addr; | |
404 | ||
405 | ||
406 | /* Place in unibus address for transfer (lower 18 bits of um_ubinfo) */ | |
407 | /* Then execute instruction */ | |
408 | rladdr->rlba = um->um_ubinfo; | |
409 | rladdr->rlcs = um->um_cmd|((um->um_ubinfo>>12)&RL_BAE); | |
410 | } | |
411 | ||
412 | /* | |
413 | * Handle a disk interrupt. | |
414 | */ | |
415 | rlintr(rl21) | |
416 | register rl21; | |
417 | { | |
418 | register struct buf *bp, *dp; | |
419 | register struct uba_ctlr *um = rlminfo[rl21]; | |
420 | register struct uba_device *ui; | |
421 | register struct rldevice *rladdr = (struct rldevice *)um->um_addr; | |
422 | register unit; | |
423 | struct rl_softc *rl = &rl_softc[um->um_ctlr]; | |
424 | struct rl_stat *st = &rl_stat[um->um_ctlr]; | |
425 | int as = rl->rl_softas; | |
426 | int needie = 1, waitdry, status; | |
427 | ||
428 | rl->rl_wticks = 0; | |
429 | rl->rl_softas = 0; | |
430 | ||
431 | /* | |
432 | * Get device and block structures, and a pointer | |
433 | * to the uba_device for the drive. | |
434 | */ | |
435 | dp = um->um_tab.b_actf; | |
436 | bp = dp->b_actf; | |
437 | ui = rldinfo[dkunit(bp)]; | |
438 | dk_busy &= ~(1 << ui->ui_dk); /* Clear busy bit */ | |
439 | ||
440 | /* | |
441 | * Check for and process errors on | |
442 | * either the drive or the controller. | |
443 | */ | |
444 | if (rladdr->rlcs & RL_ERR) { | |
445 | u_short err; | |
446 | rlwait( rladdr ); | |
447 | ||
448 | err = rladdr->rlcs; | |
449 | ||
450 | /* get staus and reset controller */ | |
451 | rladdr->rlda.getstat = RL_GSTAT; | |
452 | rladdr->rlcs = (ui->ui_slave << 8) | RL_GETSTAT; | |
453 | rlwait(rladdr); | |
454 | status = rladdr->rlmp.getstat; | |
455 | ||
456 | /* reset drive */ | |
457 | rladdr->rlda.getstat = RL_RESET; | |
458 | rladdr->rlcs = (ui->ui_slave <<8) | RL_GETSTAT; /* Get status*/ | |
459 | rlwait(rladdr); | |
460 | ||
461 | if ( (status & RLMP_WL) == RLMP_WL ) { | |
462 | /* | |
463 | * Give up on write protected devices | |
464 | * immediately. | |
465 | */ | |
466 | printf("rl%d: write protected\n", dkunit(bp)); | |
467 | bp->b_flags |= B_ERROR; | |
468 | } else if (++um->um_tab.b_errcnt > 10) { | |
469 | /* | |
470 | * After 10 retries give up. | |
471 | */ | |
472 | harderr(bp, "rl"); | |
473 | printf("cs=%b mp=%b\n", | |
474 | err, RLCS_BITS, status, RLER_BITS); | |
475 | ||
476 | bp->b_flags |= B_ERROR; | |
477 | } else | |
478 | um->um_tab.b_active = 0; /* force retry */ | |
479 | ||
480 | /* Determine disk posistion */ | |
481 | rladdr->rlcs = (ui->ui_slave << 8) | RL_RHDR; | |
482 | rlwait(rladdr); | |
483 | ||
484 | /* save disk drive posistion */ | |
485 | st->rl_cyl[ui->ui_slave] = (rladdr->rlmp.readhdr & 0177700) >> 6; | |
486 | } | |
487 | ||
488 | /* | |
489 | * If still ``active'', then don't need any more retries. | |
490 | */ | |
491 | if (um->um_tab.b_active) { | |
492 | /* RL02 check if more data from previous request */ | |
493 | if ( (bp->b_flags & B_ERROR) == 0 && | |
494 | (st->rl_bleft -= st->rl_bpart) > 0 ) { | |
495 | /* | |
496 | * the following code was modeled from the rk07 | |
497 | * driver when an ECC error occured. It has to | |
498 | * fix the bits then restart the transfer which is | |
499 | * what we have to do (restart transfer). | |
500 | */ | |
501 | int reg, npf, o, cmd, ubaddr, diff, head; | |
502 | ||
503 | ||
504 | /* seek to next head/track */ | |
505 | ||
506 | /* increment head and/or cylinder */ | |
507 | st->rl_cylnhd++; | |
508 | diff = (st->rl_cyl[ui->ui_slave] >> 1) - | |
509 | (st->rl_cylnhd >> 1); | |
510 | st->rl_cyl[ui->ui_slave] = st->rl_cylnhd; | |
511 | head = st->rl_cylnhd & 1; | |
512 | rlwait( rladdr ); | |
513 | ||
514 | if ( diff < 0 ) | |
515 | rladdr->rlda.seek = -diff << 7 | RLDA_HGH | head << 4; | |
516 | else | |
517 | rladdr->rlda.seek = diff << 7 | RLDA_LOW | head << 4; | |
518 | rladdr->rlcs = (ui->ui_slave << 8) | RL_SEEK; | |
519 | ||
520 | npf = btop( bp->b_bcount - st->rl_bleft ); | |
521 | reg = btop(um->um_ubinfo&0x3ffff) + npf; | |
522 | o = (int)bp->b_un.b_addr & PGOFSET; | |
523 | ubapurge(um); | |
524 | um->um_tab.b_active++; | |
525 | ||
526 | rlwait( rladdr ); | |
527 | rladdr->rlda.rw = st->rl_cylnhd << 6; | |
528 | if ( st->rl_bleft < (st->rl_bpart = rl02.btrak) ) | |
529 | st->rl_bpart = st->rl_bleft; | |
530 | rladdr->rlmp.rw = -(st->rl_bpart >> 1); | |
531 | cmd = (bp->b_flags&B_READ ? RL_READ : RL_WRITE) | | |
532 | RL_IE | (ui->ui_slave << 8); | |
533 | ubaddr = (int)ptob(reg) + o; | |
534 | cmd |= ((ubaddr >> 12) & RL_BAE); | |
535 | ||
536 | rladdr->rlba = ubaddr; | |
537 | rladdr->rlcs = cmd; | |
538 | return; | |
539 | } | |
540 | ||
541 | um->um_tab.b_active = 0; | |
542 | um->um_tab.b_errcnt = 0; | |
543 | dp->b_active = 0; | |
544 | dp->b_errcnt = 0; | |
545 | ||
546 | /* "b_resid" words remaining after error */ | |
547 | bp->b_resid = st->rl_bleft; | |
548 | um->um_tab.b_actf = dp->b_forw; | |
549 | dp->b_actf = bp->av_forw; | |
550 | ||
551 | retry: | |
552 | st->rl_dn = -1; | |
553 | st->rl_bpart = st->rl_bleft = 0; | |
554 | iodone(bp); | |
555 | /* | |
556 | * If this unit has more work to do, | |
557 | * then start it up right away. | |
558 | */ | |
559 | if (dp->b_actf) | |
560 | if (rlustart(ui)) | |
561 | needie = 0; | |
562 | as &= ~(1<<ui->ui_slave); | |
563 | } else | |
564 | as |= (1<<ui->ui_slave); | |
565 | /* | |
566 | * Release unibus resources and flush data paths. | |
567 | */ | |
568 | ubadone(um); | |
569 | ||
570 | /* reset state info */ | |
571 | st->rl_dn = -1; | |
572 | st->rl_cylnhd = st->rl_bpart = st->rl_bleft = 0; | |
573 | ||
574 | doattn: | |
575 | /* | |
576 | * Process other units which need attention. | |
577 | * For each unit which needs attention, call | |
578 | * the unit start routine to place the slave | |
579 | * on the controller device queue. | |
580 | */ | |
581 | while (unit = ffs(as)) { | |
582 | unit--; /* was 1 origin */ | |
583 | as &= ~(1<<unit); | |
584 | (void) rlustart(rlip[rl21][unit]); | |
585 | } | |
586 | /* | |
587 | * If the controller is not transferring, but | |
588 | * there are devices ready to transfer, start | |
589 | * the controller. | |
590 | */ | |
591 | if (um->um_tab.b_actf && um->um_tab.b_active == 0) | |
592 | (void) rlstart(um); | |
593 | } | |
594 | ||
595 | rlwait( rladdr ) | |
596 | register struct rldevice *rladdr; | |
597 | { | |
598 | while ((rladdr->rlcs & RL_CRDY) == 0) | |
599 | continue; /* Wait */ | |
600 | } | |
601 | ||
602 | rlread(dev) | |
603 | dev_t dev; | |
604 | { | |
605 | register int unit = minor(dev) >> 3; | |
606 | ||
607 | if (unit >= NRL) | |
608 | u.u_error = ENXIO; | |
609 | else | |
610 | physio(rlstrategy, &rrlbuf[unit], dev, B_READ, minphys); | |
611 | } | |
612 | ||
613 | rlwrite(dev) | |
614 | dev_t dev; | |
615 | { | |
616 | register int unit = minor(dev) >> 3; | |
617 | ||
618 | if (unit >= NRL) | |
619 | u.u_error = ENXIO; | |
620 | else | |
621 | physio(rlstrategy, &rrlbuf[unit], dev, B_WRITE, minphys); | |
622 | } | |
623 | ||
624 | /* | |
625 | * Reset driver after UBA init. | |
626 | * Cancel software state of all pending transfers | |
627 | * and restart all units and the controller. | |
628 | */ | |
629 | rlreset(uban) | |
630 | int uban; | |
631 | { | |
632 | register struct uba_ctlr *um; | |
633 | register struct uba_device *ui; | |
634 | register struct rldevice *rladdr; | |
635 | register struct rl_stat *st; | |
636 | register int rl21, unit; | |
637 | ||
638 | for (rl21 = 0; rl21 < NHL; rl21++) { | |
639 | if ((um = rlminfo[rl21]) == 0 || um->um_ubanum != uban || | |
640 | um->um_alive == 0) | |
641 | continue; | |
642 | printf(" Reset hl%d", rl21); | |
643 | rladdr = (struct rldevice *)um->um_addr; | |
644 | st = &rl_stat[rl21]; | |
645 | um->um_tab.b_active = 0; | |
646 | um->um_tab.b_actf = um->um_tab.b_actl = 0; | |
647 | if (um->um_ubinfo) { | |
648 | printf("<%d>", (um->um_ubinfo>>28)&0xf); | |
649 | ubadone(um); | |
650 | } | |
651 | ||
652 | /* reset controller */ | |
653 | st->rl_dn = -1; | |
654 | st->rl_cylnhd = 0; | |
655 | st->rl_bleft = 0; | |
656 | st->rl_bpart = 0; | |
657 | rlwait( rladdr ); | |
658 | ||
659 | for (unit = 0; unit < NRL; unit++) { | |
660 | rladdr->rlcs = (unit << 8) | RL_GETSTAT; | |
661 | rlwait( rladdr ); | |
662 | ||
663 | /* Determine disk posistion */ | |
664 | rladdr->rlcs = (unit << 8) | RL_RHDR; | |
665 | rlwait(rladdr); | |
666 | ||
667 | /* save disk drive posistion */ | |
668 | st->rl_cyl[unit] = | |
669 | (rladdr->rlmp.readhdr & 0177700) >> 6; | |
670 | ||
671 | if ((ui = rldinfo[unit]) == 0) | |
672 | continue; | |
673 | if (ui->ui_alive == 0 || ui->ui_mi != um) | |
674 | continue; | |
675 | rlutab[unit].b_active = 0; | |
676 | (void) rlustart(ui); | |
677 | } | |
678 | (void) rlstart(um); | |
679 | } | |
680 | } | |
681 | ||
682 | /* | |
683 | * Wake up every second and if an interrupt is pending | |
684 | * but nothing has happened increment a counter. | |
685 | * If nothing happens for 20 seconds, reset the UNIBUS | |
686 | * and begin anew. | |
687 | */ | |
688 | rlwatch() | |
689 | { | |
690 | register struct uba_ctlr *um; | |
691 | register rl21, unit; | |
692 | register struct rl_softc *rl; | |
693 | ||
694 | timeout(rlwatch, (caddr_t)0, hz); | |
695 | for (rl21 = 0; rl21 < NHL; rl21++) { | |
696 | um = rlminfo[rl21]; | |
697 | if (um == 0 || um->um_alive == 0) | |
698 | continue; | |
699 | rl = &rl_softc[rl21]; | |
700 | if (um->um_tab.b_active == 0) { | |
701 | for (unit = 0; unit < NRL; unit++) | |
702 | if (rlutab[unit].b_active && | |
703 | rldinfo[unit]->ui_mi == um) | |
704 | goto active; | |
705 | rl->rl_wticks = 0; | |
706 | continue; | |
707 | } | |
708 | active: | |
709 | rl->rl_wticks++; | |
710 | if (rl->rl_wticks >= 20) { | |
711 | rl->rl_wticks = 0; | |
712 | printf("hl%d: lost interrupt\n", rl21); | |
713 | ubareset(um->um_ubanum); | |
714 | } | |
715 | } | |
716 | } | |
717 | ||
718 | rldump(dev) | |
719 | dev_t dev; | |
720 | { | |
721 | /* don't think there is room on swap for it anyway. */ | |
722 | } |