Commit | Line | Data |
---|---|---|
a0eab615 | 1 | /* up.c 4.31 81/03/09 */ |
008c0481 | 2 | |
66b4fb09 | 3 | #include "up.h" |
a3cb8f60 | 4 | #if NSC > 0 |
008c0481 | 5 | /* |
10fb932f | 6 | * UNIBUS disk driver with overlapped seeks and ECC recovery. |
0c48c799 BJ |
7 | * |
8 | * TODO: | |
0c48c799 BJ |
9 | * Add reading of bad sector information and disk layout from sector 1 |
10 | * Add bad sector forwarding code | |
11 | * Check multiple drive handling | |
0c48c799 | 12 | * Check unibus reset code |
89bd2f01 | 13 | * Check that offset recovery code, etc works |
008c0481 BJ |
14 | */ |
15 | ||
16 | #include "../h/param.h" | |
17 | #include "../h/systm.h" | |
3f3a34c3 BJ |
18 | #include "../h/cpu.h" |
19 | #include "../h/nexus.h" | |
41888f16 | 20 | #include "../h/dk.h" |
008c0481 BJ |
21 | #include "../h/buf.h" |
22 | #include "../h/conf.h" | |
23 | #include "../h/dir.h" | |
24 | #include "../h/user.h" | |
25 | #include "../h/map.h" | |
80e7c811 | 26 | #include "../h/pte.h" |
008c0481 | 27 | #include "../h/mtpr.h" |
008c0481 | 28 | #include "../h/vm.h" |
89bd2f01 BJ |
29 | #include "../h/ubavar.h" |
30 | #include "../h/ubareg.h" | |
0ff318b2 | 31 | #include "../h/cmap.h" |
008c0481 | 32 | |
0ff318b2 | 33 | #include "../h/upreg.h" |
008c0481 | 34 | |
3f3a34c3 BJ |
35 | struct up_softc { |
36 | int sc_softas; | |
71236e46 | 37 | int sc_ndrive; |
3f3a34c3 | 38 | int sc_wticks; |
736772ef | 39 | int sc_recal; |
a3cb8f60 | 40 | } up_softc[NSC]; |
008c0481 | 41 | |
3f3a34c3 | 42 | /* THIS SHOULD BE READ OFF THE PACK, PER DRIVE */ |
008c0481 BJ |
43 | struct size |
44 | { | |
45 | daddr_t nblocks; | |
46 | int cyloff; | |
47 | } up_sizes[8] = { | |
48 | 15884, 0, /* A=cyl 0 thru 26 */ | |
49 | 33440, 27, /* B=cyl 27 thru 81 */ | |
d1778415 | 50 | 495520, 0, /* C=cyl 0 thru 814 */ |
008c0481 BJ |
51 | 15884, 562, /* D=cyl 562 thru 588 */ |
52 | 55936, 589, /* E=cyl 589 thru 680 */ | |
53 | 81472, 681, /* F=cyl 681 thru 814 */ | |
54 | 153824, 562, /* G=cyl 562 thru 814 */ | |
008c0481 | 55 | 291346, 82, /* H=cyl 82 thru 561 */ |
3f3a34c3 BJ |
56 | }, fj_sizes[8] = { |
57 | 15884, 0, /* A=cyl 0 thru 49 */ | |
58 | 33440, 50, /* B=cyl 50 thru 154 */ | |
59 | 263360, 0, /* C=cyl 0 thru 822 */ | |
60 | 0, 0, | |
61 | 0, 0, | |
62 | 0, 0, | |
63 | 0, 0, | |
64 | 213760, 155, /* H=cyl 155 thru 822 */ | |
008c0481 | 65 | }; |
3f3a34c3 | 66 | /* END OF STUFF WHICH SHOULD BE READ IN PER DISK */ |
008c0481 | 67 | |
3f3a34c3 BJ |
68 | #define _upSDIST 2 /* 1.0 msec */ |
69 | #define _upRDIST 4 /* 2.0 msec */ | |
70 | ||
71 | int upSDIST = _upSDIST; | |
72 | int upRDIST = _upRDIST; | |
73 | ||
71236e46 | 74 | int upprobe(), upslave(), upattach(), updgo(), upintr(); |
89bd2f01 BJ |
75 | struct uba_ctlr *upminfo[NSC]; |
76 | struct uba_device *updinfo[NUP]; | |
77 | struct uba_device *upip[NSC][4]; | |
d763a2b7 | 78 | |
71236e46 | 79 | u_short upstd[] = { 0776700, 0774400, 0776300, 0 }; |
0801d37f | 80 | struct uba_driver scdriver = |
71236e46 | 81 | { upprobe, upslave, upattach, updgo, upstd, "up", updinfo, "sc", upminfo }; |
3f3a34c3 BJ |
82 | struct buf uputab[NUP]; |
83 | ||
84 | struct upst { | |
85 | short nsect; | |
86 | short ntrak; | |
87 | short nspc; | |
88 | short ncyl; | |
89 | struct size *sizes; | |
90 | } upst[] = { | |
71236e46 BJ |
91 | 32, 19, 32*19, 823, up_sizes, /* 9300/cdc */ |
92 | /* 9300 actually has 815 cylinders... */ | |
3f3a34c3 BJ |
93 | 32, 10, 32*10, 823, fj_sizes, /* fujitsu 160m */ |
94 | }; | |
008c0481 | 95 | |
2601dfbd BJ |
96 | u_char up_offset[16] = { |
97 | UP_P400, UP_M400, UP_P400, UP_M400, UP_P800, UP_M800, UP_P800, UP_M800, | |
98 | UP_P1200, UP_M1200, UP_P1200, UP_M1200, 0, 0, 0, 0 | |
99 | }; | |
008c0481 | 100 | |
0801d37f | 101 | struct buf rupbuf[NUP]; |
008c0481 | 102 | |
008c0481 BJ |
103 | #define b_cylin b_resid |
104 | ||
008c0481 BJ |
105 | #ifdef INTRLVE |
106 | daddr_t dkblock(); | |
107 | #endif | |
3f3a34c3 BJ |
108 | |
109 | int upwstart, upwatch(); /* Have started guardian */ | |
7e00c42b | 110 | int upseek; |
f88f8fdb | 111 | int upwaitdry; |
3f3a34c3 BJ |
112 | |
113 | /*ARGSUSED*/ | |
71236e46 | 114 | upprobe(reg) |
3f3a34c3 | 115 | caddr_t reg; |
008c0481 | 116 | { |
d763a2b7 BJ |
117 | register int br, cvec; |
118 | ||
71236e46 BJ |
119 | #ifdef lint |
120 | br = 0; cvec = br; br = cvec; | |
121 | #endif | |
2601dfbd | 122 | ((struct updevice *)reg)->upcs1 = UP_IE|UP_RDY; |
71236e46 | 123 | DELAY(10); |
2601dfbd | 124 | ((struct updevice *)reg)->upcs1 = 0; |
d763a2b7 | 125 | return (1); |
3f3a34c3 BJ |
126 | } |
127 | ||
71236e46 | 128 | upslave(ui, reg) |
89bd2f01 | 129 | struct uba_device *ui; |
3f3a34c3 BJ |
130 | caddr_t reg; |
131 | { | |
2601dfbd | 132 | register struct updevice *upaddr = (struct updevice *)reg; |
3f3a34c3 BJ |
133 | |
134 | upaddr->upcs1 = 0; /* conservative */ | |
71236e46 | 135 | upaddr->upcs2 = ui->ui_slave; |
2601dfbd BJ |
136 | if (upaddr->upcs2&UP_NED) { |
137 | upaddr->upcs1 = UP_DCLR|UP_GO; | |
3f3a34c3 BJ |
138 | return (0); |
139 | } | |
71236e46 BJ |
140 | return (1); |
141 | } | |
142 | ||
143 | upattach(ui) | |
89bd2f01 | 144 | register struct uba_device *ui; |
71236e46 | 145 | { |
2601dfbd BJ |
146 | #ifdef notdef |
147 | register struct updevice *upaddr; | |
148 | #endif | |
71236e46 | 149 | |
6a81870e | 150 | if (upwstart == 0) { |
7780575a | 151 | timeout(upwatch, (caddr_t)0, hz); |
6a81870e BJ |
152 | upwstart++; |
153 | } | |
b7333467 BJ |
154 | if (ui->ui_dk >= 0) |
155 | dk_mspw[ui->ui_dk] = .0000020345; | |
71236e46 BJ |
156 | upip[ui->ui_ctlr][ui->ui_slave] = ui; |
157 | up_softc[ui->ui_ctlr].sc_ndrive++; | |
2601dfbd BJ |
158 | #ifdef notdef |
159 | upaddr = (struct updevice *)ui->ui_addr; | |
160 | upaddr->upcs1 = 0; | |
161 | upaddr->upcs2 = ui->ui_slave; | |
162 | upaddr->uphr = -1; | |
163 | /* ... */ | |
164 | if (upaddr-> ... == 10) | |
165 | ui->ui_type = 1; | |
166 | #endif | |
3f3a34c3 BJ |
167 | } |
168 | ||
3f3a34c3 BJ |
169 | upstrategy(bp) |
170 | register struct buf *bp; | |
171 | { | |
89bd2f01 | 172 | register struct uba_device *ui; |
3f3a34c3 BJ |
173 | register struct upst *st; |
174 | register int unit; | |
7e00c42b | 175 | register struct buf *dp; |
3f3a34c3 | 176 | int xunit = minor(bp->b_dev) & 07; |
7e00c42b | 177 | long bn, sz; |
3f3a34c3 | 178 | |
7e00c42b | 179 | sz = (bp->b_bcount+511) >> 9; |
008c0481 | 180 | unit = dkunit(bp); |
3f3a34c3 BJ |
181 | if (unit >= NUP) |
182 | goto bad; | |
183 | ui = updinfo[unit]; | |
184 | if (ui == 0 || ui->ui_alive == 0) | |
185 | goto bad; | |
186 | st = &upst[ui->ui_type]; | |
187 | if (bp->b_blkno < 0 || | |
188 | (bn = dkblock(bp))+sz > st->sizes[xunit].nblocks) | |
189 | goto bad; | |
190 | bp->b_cylin = bn/st->nspc + st->sizes[xunit].cyloff; | |
008c0481 | 191 | (void) spl5(); |
7e00c42b BJ |
192 | dp = &uputab[ui->ui_unit]; |
193 | disksort(dp, bp); | |
194 | if (dp->b_active == 0) { | |
3f3a34c3 BJ |
195 | (void) upustart(ui); |
196 | bp = &ui->ui_mi->um_tab; | |
197 | if (bp->b_actf && bp->b_active == 0) | |
198 | (void) upstart(ui->ui_mi); | |
008c0481 BJ |
199 | } |
200 | (void) spl0(); | |
3f3a34c3 BJ |
201 | return; |
202 | ||
203 | bad: | |
204 | bp->b_flags |= B_ERROR; | |
205 | iodone(bp); | |
206 | return; | |
008c0481 BJ |
207 | } |
208 | ||
736772ef BJ |
209 | /* |
210 | * Unit start routine. | |
211 | * Seek the drive to be where the data is | |
212 | * and then generate another interrupt | |
213 | * to actually start the transfer. | |
214 | * If there is only one drive on the controller, | |
215 | * or we are very close to the data, don't | |
216 | * bother with the search. If called after | |
217 | * searching once, don't bother to look where | |
218 | * we are, just queue for transfer (to avoid | |
219 | * positioning forever without transferrring.) | |
220 | */ | |
3f3a34c3 | 221 | upustart(ui) |
89bd2f01 | 222 | register struct uba_device *ui; |
008c0481 BJ |
223 | { |
224 | register struct buf *bp, *dp; | |
89bd2f01 | 225 | register struct uba_ctlr *um; |
2601dfbd | 226 | register struct updevice *upaddr; |
3f3a34c3 | 227 | register struct upst *st; |
008c0481 | 228 | daddr_t bn; |
736772ef | 229 | int sn, csn; |
71236e46 BJ |
230 | /* |
231 | * The SC21 cancels commands if you just say | |
2601dfbd | 232 | * cs1 = UP_IE |
71236e46 BJ |
233 | * so we are cautious about handling of cs1. |
234 | * Also don't bother to clear as bits other than in upintr(). | |
235 | */ | |
736772ef BJ |
236 | int didie = 0; |
237 | ||
238 | if (ui == 0) | |
239 | return (0); | |
89bd2f01 | 240 | um = ui->ui_mi; |
3f3a34c3 BJ |
241 | dk_busy &= ~(1<<ui->ui_dk); |
242 | dp = &uputab[ui->ui_unit]; | |
7bc8d985 | 243 | if ((bp = dp->b_actf) == NULL) |
eb891eaa | 244 | goto out; |
736772ef BJ |
245 | /* |
246 | * If the controller is active, just remember | |
247 | * that this device would like to be positioned... | |
248 | * if we tried to position now we would confuse the SC21. | |
249 | */ | |
3f3a34c3 | 250 | if (um->um_tab.b_active) { |
d763a2b7 | 251 | up_softc[um->um_ctlr].sc_softas |= 1<<ui->ui_slave; |
2a3b9a7f BJ |
252 | return (0); |
253 | } | |
736772ef BJ |
254 | /* |
255 | * If we have already positioned this drive, | |
256 | * then just put it on the ready queue. | |
257 | */ | |
a3f430e0 BJ |
258 | if (dp->b_active) |
259 | goto done; | |
260 | dp->b_active = 1; | |
2601dfbd | 261 | upaddr = (struct updevice *)um->um_addr; |
3f3a34c3 | 262 | upaddr->upcs2 = ui->ui_slave; |
736772ef BJ |
263 | /* |
264 | * If drive has just come up, | |
265 | * setup the pack. | |
266 | */ | |
2601dfbd | 267 | if ((upaddr->upds & UP_VV) == 0) { |
71236e46 | 268 | /* SHOULD WARN SYSTEM THAT THIS HAPPENED */ |
2601dfbd BJ |
269 | upaddr->upcs1 = UP_IE|UP_DCLR|UP_GO; |
270 | upaddr->upcs1 = UP_IE|UP_PRESET|UP_GO; | |
271 | upaddr->upof = UP_FMT22; | |
eb891eaa | 272 | didie = 1; |
008c0481 | 273 | } |
736772ef BJ |
274 | /* |
275 | * If drive is offline, forget about positioning. | |
276 | */ | |
2601dfbd | 277 | if ((upaddr->upds & (UP_DPR|UP_MOL)) != (UP_DPR|UP_MOL)) |
2a3b9a7f | 278 | goto done; |
736772ef BJ |
279 | /* |
280 | * If there is only one drive, | |
281 | * dont bother searching. | |
282 | */ | |
71236e46 BJ |
283 | if (up_softc[um->um_ctlr].sc_ndrive == 1) |
284 | goto done; | |
736772ef BJ |
285 | /* |
286 | * Figure out where this transfer is going to | |
287 | * and see if we are close enough to justify not searching. | |
288 | */ | |
3f3a34c3 | 289 | st = &upst[ui->ui_type]; |
008c0481 | 290 | bn = dkblock(bp); |
3f3a34c3 BJ |
291 | sn = bn%st->nspc; |
292 | sn = (sn + st->nsect - upSDIST) % st->nsect; | |
736772ef | 293 | if (bp->b_cylin - upaddr->updc) |
7bc8d985 | 294 | goto search; /* Not on-cylinder */ |
2a3b9a7f BJ |
295 | else if (upseek) |
296 | goto done; /* Ok just to be on-cylinder */ | |
008c0481 | 297 | csn = (upaddr->upla>>6) - sn - 1; |
7bc8d985 | 298 | if (csn < 0) |
3f3a34c3 BJ |
299 | csn += st->nsect; |
300 | if (csn > st->nsect - upRDIST) | |
008c0481 | 301 | goto done; |
008c0481 | 302 | search: |
736772ef BJ |
303 | upaddr->updc = bp->b_cylin; |
304 | /* | |
305 | * Not on cylinder at correct position, | |
306 | * seek/search. | |
307 | */ | |
2a3b9a7f | 308 | if (upseek) |
2601dfbd | 309 | upaddr->upcs1 = UP_IE|UP_SEEK|UP_GO; |
7e00c42b | 310 | else { |
2a3b9a7f | 311 | upaddr->upda = sn; |
2601dfbd | 312 | upaddr->upcs1 = UP_IE|UP_SEARCH|UP_GO; |
2a3b9a7f | 313 | } |
eb891eaa | 314 | didie = 1; |
736772ef BJ |
315 | /* |
316 | * Mark unit busy for iostat. | |
317 | */ | |
3f3a34c3 BJ |
318 | if (ui->ui_dk >= 0) { |
319 | dk_busy |= 1<<ui->ui_dk; | |
320 | dk_seek[ui->ui_dk]++; | |
008c0481 | 321 | } |
eb891eaa | 322 | goto out; |
008c0481 | 323 | done: |
736772ef BJ |
324 | /* |
325 | * Device is ready to go. | |
326 | * Put it on the ready queue for the controller | |
327 | * (unless its already there.) | |
328 | */ | |
2601dfbd BJ |
329 | if (dp->b_active != 2) { |
330 | dp->b_forw = NULL; | |
331 | if (um->um_tab.b_actf == NULL) | |
332 | um->um_tab.b_actf = dp; | |
333 | else | |
334 | um->um_tab.b_actl->b_forw = dp; | |
335 | um->um_tab.b_actl = dp; | |
336 | dp->b_active = 2; | |
337 | } | |
eb891eaa BJ |
338 | out: |
339 | return (didie); | |
008c0481 BJ |
340 | } |
341 | ||
736772ef BJ |
342 | /* |
343 | * Start up a transfer on a drive. | |
344 | */ | |
3f3a34c3 | 345 | upstart(um) |
89bd2f01 | 346 | register struct uba_ctlr *um; |
008c0481 BJ |
347 | { |
348 | register struct buf *bp, *dp; | |
89bd2f01 | 349 | register struct uba_device *ui; |
2601dfbd | 350 | register struct updevice *upaddr; |
7e00c42b | 351 | struct upst *st; |
008c0481 | 352 | daddr_t bn; |
f88f8fdb | 353 | int dn, sn, tn, cmd, waitdry; |
008c0481 | 354 | |
008c0481 | 355 | loop: |
736772ef BJ |
356 | /* |
357 | * Pull a request off the controller queue | |
358 | */ | |
3f3a34c3 | 359 | if ((dp = um->um_tab.b_actf) == NULL) |
eb891eaa | 360 | return (0); |
008c0481 | 361 | if ((bp = dp->b_actf) == NULL) { |
3f3a34c3 | 362 | um->um_tab.b_actf = dp->b_forw; |
008c0481 BJ |
363 | goto loop; |
364 | } | |
736772ef BJ |
365 | /* |
366 | * Mark controller busy, and | |
367 | * determine destination of this request. | |
368 | */ | |
3f3a34c3 BJ |
369 | um->um_tab.b_active++; |
370 | ui = updinfo[dkunit(bp)]; | |
008c0481 | 371 | bn = dkblock(bp); |
3f3a34c3 BJ |
372 | dn = ui->ui_slave; |
373 | st = &upst[ui->ui_type]; | |
374 | sn = bn%st->nspc; | |
375 | tn = sn/st->nsect; | |
376 | sn %= st->nsect; | |
2601dfbd | 377 | upaddr = (struct updevice *)ui->ui_addr; |
736772ef BJ |
378 | /* |
379 | * Select drive if not selected already. | |
380 | */ | |
381 | if ((upaddr->upcs2&07) != dn) | |
382 | upaddr->upcs2 = dn; | |
383 | /* | |
384 | * Check that it is ready and online | |
385 | */ | |
f88f8fdb BJ |
386 | waitdry = 0; |
387 | while ((upaddr->upds&UP_DRY) == 0) { | |
388 | if (++waitdry > 512) | |
389 | break; | |
390 | upwaitdry++; | |
391 | } | |
392 | if ((upaddr->upds & UP_DREADY) != UP_DREADY) { | |
f6d201ff | 393 | printf("up%d: not ready", dkunit(bp)); |
f88f8fdb | 394 | if ((upaddr->upds & UP_DREADY) != UP_DREADY) { |
71236e46 | 395 | printf("\n"); |
3f3a34c3 BJ |
396 | um->um_tab.b_active = 0; |
397 | um->um_tab.b_errcnt = 0; | |
88253fd2 BJ |
398 | dp->b_actf = bp->av_forw; |
399 | dp->b_active = 0; | |
400 | bp->b_flags |= B_ERROR; | |
401 | iodone(bp); | |
88253fd2 BJ |
402 | goto loop; |
403 | } | |
736772ef BJ |
404 | /* |
405 | * Oh, well, sometimes this | |
406 | * happens, for reasons unknown. | |
407 | */ | |
2601dfbd | 408 | printf(" (flakey)\n"); |
008c0481 | 409 | } |
736772ef BJ |
410 | /* |
411 | * After 16th retry, do offset positioning | |
412 | */ | |
3f3a34c3 | 413 | if (um->um_tab.b_errcnt >= 16 && (bp->b_flags&B_READ) != 0) { |
2601dfbd BJ |
414 | upaddr->upof = up_offset[um->um_tab.b_errcnt & 017] | UP_FMT22; |
415 | upaddr->upcs1 = UP_IE|UP_OFFSET|UP_GO; | |
416 | while (upaddr->upds & UP_PIP) | |
008c0481 BJ |
417 | DELAY(25); |
418 | } | |
736772ef BJ |
419 | /* |
420 | * Setup for the transfer, and get in the | |
421 | * UNIBUS adaptor queue. | |
422 | */ | |
5aa9d5ea | 423 | upaddr->updc = bp->b_cylin; |
008c0481 | 424 | upaddr->upda = (tn << 8) + sn; |
008c0481 BJ |
425 | upaddr->upwc = -bp->b_bcount / sizeof (short); |
426 | if (bp->b_flags & B_READ) | |
2601dfbd | 427 | cmd = UP_IE|UP_RCOM|UP_GO; |
008c0481 | 428 | else |
2601dfbd | 429 | cmd = UP_IE|UP_WCOM|UP_GO; |
b7333467 | 430 | um->um_cmd = cmd; |
a0eab615 | 431 | (void) ubago(ui); |
eb891eaa | 432 | return (1); |
008c0481 BJ |
433 | } |
434 | ||
736772ef BJ |
435 | /* |
436 | * Now all ready to go, stuff the registers. | |
437 | */ | |
b7333467 | 438 | updgo(um) |
89bd2f01 | 439 | struct uba_ctlr *um; |
3f3a34c3 | 440 | { |
2601dfbd | 441 | register struct updevice *upaddr = (struct updevice *)um->um_addr; |
7e00c42b | 442 | |
b7333467 BJ |
443 | upaddr->upba = um->um_ubinfo; |
444 | upaddr->upcs1 = um->um_cmd|((um->um_ubinfo>>8)&0x300); | |
3f3a34c3 BJ |
445 | } |
446 | ||
736772ef BJ |
447 | /* |
448 | * Handle a disk interrupt. | |
449 | */ | |
443c8066 | 450 | upintr(sc21) |
3f3a34c3 | 451 | register sc21; |
008c0481 BJ |
452 | { |
453 | register struct buf *bp, *dp; | |
89bd2f01 BJ |
454 | register struct uba_ctlr *um = upminfo[sc21]; |
455 | register struct uba_device *ui; | |
2601dfbd | 456 | register struct updevice *upaddr = (struct updevice *)um->um_addr; |
008c0481 | 457 | register unit; |
7e00c42b | 458 | struct up_softc *sc = &up_softc[um->um_ctlr]; |
71236e46 | 459 | int as = (upaddr->upas & 0377) | sc->sc_softas; |
f88f8fdb | 460 | int needie = 1, waitdry; |
008c0481 | 461 | |
7e00c42b | 462 | sc->sc_wticks = 0; |
71236e46 | 463 | sc->sc_softas = 0; |
736772ef BJ |
464 | /* |
465 | * If controller wasn't transferring, then this is an | |
466 | * interrupt for attention status on seeking drives. | |
467 | * Just service them. | |
468 | */ | |
469 | if (um->um_tab.b_active == 0) { | |
470 | if (upaddr->upcs1 & UP_TRE) | |
471 | upaddr->upcs1 = UP_TRE; | |
472 | goto doattn; | |
473 | } | |
736772ef BJ |
474 | /* |
475 | * Get device and block structures, and a pointer | |
89bd2f01 | 476 | * to the uba_device for the drive. Select the drive. |
736772ef BJ |
477 | */ |
478 | dp = um->um_tab.b_actf; | |
479 | bp = dp->b_actf; | |
480 | ui = updinfo[dkunit(bp)]; | |
481 | dk_busy &= ~(1 << ui->ui_dk); | |
482 | if ((upaddr->upcs2&07) != ui->ui_slave) | |
3f3a34c3 | 483 | upaddr->upcs2 = ui->ui_slave; |
736772ef BJ |
484 | /* |
485 | * Check for and process errors on | |
486 | * either the drive or the controller. | |
487 | */ | |
488 | if ((upaddr->upds&UP_ERR) || (upaddr->upcs1&UP_TRE)) { | |
f88f8fdb BJ |
489 | waitdry = 0; |
490 | while ((upaddr->upds & UP_DRY) == 0) { | |
491 | if (++waitdry > 512) | |
492 | break; | |
493 | upwaitdry++; | |
494 | } | |
f6d201ff | 495 | if (upaddr->uper1&UP_WLE) { |
736772ef BJ |
496 | /* |
497 | * Give up on write locked devices | |
498 | * immediately. | |
499 | */ | |
f6d201ff | 500 | printf("up%d: write locked\n", dkunit(bp)); |
736772ef BJ |
501 | bp->b_flags |= B_ERROR; |
502 | } else if (++um->um_tab.b_errcnt > 27) { | |
503 | /* | |
504 | * After 28 retries (16 without offset, and | |
505 | * 12 with offset positioning) give up. | |
506 | */ | |
f6d201ff BJ |
507 | harderr(bp, "up"); |
508 | printf("cs2=%b er1=%b er2=%b\n", | |
c84ff1f9 BJ |
509 | upaddr->upcs2, UPCS2_BITS, |
510 | upaddr->uper1, UPER1_BITS, | |
511 | upaddr->uper2, UPER2_BITS); | |
736772ef BJ |
512 | bp->b_flags |= B_ERROR; |
513 | } else { | |
514 | /* | |
515 | * Retriable error. | |
516 | * If a soft ecc, correct it (continuing | |
517 | * by returning if necessary. | |
518 | * Otherwise fall through and retry the transfer | |
519 | */ | |
520 | um->um_tab.b_active = 0; /* force retry */ | |
2601dfbd BJ |
521 | if ((upaddr->uper1&(UP_DCK|UP_ECH))==UP_DCK) |
522 | if (upecc(ui)) | |
523 | return; | |
736772ef BJ |
524 | } |
525 | /* | |
526 | * Clear drive error and, every eight attempts, | |
527 | * (starting with the fourth) | |
528 | * recalibrate to clear the slate. | |
529 | */ | |
530 | upaddr->upcs1 = UP_TRE|UP_IE|UP_DCLR|UP_GO; | |
531 | needie = 0; | |
532 | if ((um->um_tab.b_errcnt&07) == 4) { | |
533 | upaddr->upcs1 = UP_RECAL|UP_IE|UP_GO; | |
534 | um->um_tab.b_active = 1; | |
535 | sc->sc_recal = 1; | |
536 | return; | |
537 | } | |
538 | } | |
539 | /* | |
540 | * Done retrying transfer... release | |
541 | * resources... if we were recalibrating, | |
542 | * then retry the transfer. | |
543 | * Mathematical note: 28%8 != 4. | |
544 | */ | |
545 | ubadone(um); | |
546 | if (sc->sc_recal) { | |
547 | sc->sc_recal = 0; | |
548 | um->um_tab.b_active = 0; /* force retry */ | |
549 | } | |
550 | /* | |
551 | * If still ``active'', then don't need any more retries. | |
552 | */ | |
553 | if (um->um_tab.b_active) { | |
554 | /* | |
555 | * If we were offset positioning, | |
556 | * return to centerline. | |
557 | */ | |
558 | if (um->um_tab.b_errcnt >= 16) { | |
559 | upaddr->upof = UP_FMT22; | |
560 | upaddr->upcs1 = UP_RTC|UP_GO|UP_IE; | |
561 | while (upaddr->upds & UP_PIP) | |
562 | DELAY(25); | |
eb891eaa | 563 | needie = 0; |
008c0481 | 564 | } |
736772ef BJ |
565 | um->um_tab.b_active = 0; |
566 | um->um_tab.b_errcnt = 0; | |
567 | um->um_tab.b_actf = dp->b_forw; | |
568 | dp->b_active = 0; | |
569 | dp->b_errcnt = 0; | |
570 | dp->b_actf = bp->av_forw; | |
571 | bp->b_resid = (-upaddr->upwc * sizeof(short)); | |
572 | iodone(bp); | |
573 | /* | |
574 | * If this unit has more work to do, | |
575 | * then start it up right away. | |
576 | */ | |
577 | if (dp->b_actf) | |
578 | if (upustart(ui)) | |
eb891eaa | 579 | needie = 0; |
008c0481 | 580 | } |
736772ef BJ |
581 | as &= ~(1<<ui->ui_slave); |
582 | doattn: | |
583 | /* | |
584 | * Process other units which need attention. | |
585 | * For each unit which needs attention, call | |
586 | * the unit start routine to place the slave | |
587 | * on the controller device queue. | |
588 | */ | |
71236e46 BJ |
589 | for (unit = 0; as; as >>= 1, unit++) |
590 | if (as & 1) { | |
7e00c42b | 591 | upaddr->upas = 1<<unit; |
71236e46 | 592 | if (upustart(upip[sc21][unit])) |
1f3d30ee BJ |
593 | needie = 0; |
594 | } | |
736772ef BJ |
595 | /* |
596 | * If the controller is not transferring, but | |
597 | * there are devices ready to transfer, start | |
598 | * the controller. | |
599 | */ | |
3f3a34c3 BJ |
600 | if (um->um_tab.b_actf && um->um_tab.b_active == 0) |
601 | if (upstart(um)) | |
eb891eaa | 602 | needie = 0; |
2a3b9a7f | 603 | if (needie) |
2601dfbd | 604 | upaddr->upcs1 = UP_IE; |
008c0481 BJ |
605 | } |
606 | ||
607 | upread(dev) | |
0801d37f | 608 | dev_t dev; |
008c0481 | 609 | { |
0801d37f | 610 | register int unit = minor(dev) >> 3; |
7e00c42b | 611 | |
0801d37f BJ |
612 | if (unit >= NUP) |
613 | u.u_error = ENXIO; | |
614 | else | |
615 | physio(upstrategy, &rupbuf[unit], dev, B_READ, minphys); | |
008c0481 BJ |
616 | } |
617 | ||
618 | upwrite(dev) | |
0801d37f | 619 | dev_t dev; |
008c0481 | 620 | { |
0801d37f | 621 | register int unit = minor(dev) >> 3; |
7e00c42b | 622 | |
0801d37f BJ |
623 | if (unit >= NUP) |
624 | u.u_error = ENXIO; | |
625 | else | |
626 | physio(upstrategy, &rupbuf[unit], dev, B_WRITE, minphys); | |
008c0481 BJ |
627 | } |
628 | ||
7bc8d985 BJ |
629 | /* |
630 | * Correct an ECC error, and restart the i/o to complete | |
631 | * the transfer if necessary. This is quite complicated because | |
632 | * the transfer may be going to an odd memory address base and/or | |
633 | * across a page boundary. | |
634 | */ | |
3f3a34c3 | 635 | upecc(ui) |
89bd2f01 | 636 | register struct uba_device *ui; |
008c0481 | 637 | { |
2601dfbd | 638 | register struct updevice *up = (struct updevice *)ui->ui_addr; |
3f3a34c3 | 639 | register struct buf *bp = uputab[ui->ui_unit].b_actf; |
89bd2f01 | 640 | register struct uba_ctlr *um = ui->ui_mi; |
3f3a34c3 BJ |
641 | register struct upst *st; |
642 | struct uba_regs *ubp = ui->ui_hd->uh_uba; | |
7bc8d985 | 643 | register int i; |
008c0481 | 644 | caddr_t addr; |
7bc8d985 | 645 | int reg, bit, byte, npf, mask, o, cmd, ubaddr; |
008c0481 BJ |
646 | int bn, cn, tn, sn; |
647 | ||
008c0481 | 648 | /* |
7bc8d985 BJ |
649 | * Npf is the number of sectors transferred before the sector |
650 | * containing the ECC error, and reg is the UBA register | |
651 | * mapping (the first part of) the transfer. | |
652 | * O is offset within a memory page of the first byte transferred. | |
008c0481 | 653 | */ |
7bc8d985 | 654 | npf = btop((up->upwc * sizeof(short)) + bp->b_bcount) - 1; |
b7333467 | 655 | reg = btop(um->um_ubinfo&0x3ffff) + npf; |
008c0481 | 656 | o = (int)bp->b_un.b_addr & PGOFSET; |
89bd2f01 | 657 | printf("up%d%c: soft ecc sn%d\n", dkunit(bp), |
0c48c799 | 658 | 'a'+(minor(bp->b_dev)&07), bp->b_blkno + npf); |
008c0481 | 659 | mask = up->upec2; |
7bc8d985 BJ |
660 | /* |
661 | * Flush the buffered data path, and compute the | |
662 | * byte and bit position of the error. The variable i | |
663 | * is the byte offset in the transfer, the variable byte | |
664 | * is the offset from a page boundary in main memory. | |
665 | */ | |
060afaf6 | 666 | ubapurge(um); |
7bc8d985 BJ |
667 | i = up->upec1 - 1; /* -1 makes 0 origin */ |
668 | bit = i&07; | |
669 | i = (i&~07)>>3; | |
008c0481 | 670 | byte = i + o; |
7bc8d985 BJ |
671 | /* |
672 | * Correct while possible bits remain of mask. Since mask | |
673 | * contains 11 bits, we continue while the bit offset is > -11. | |
674 | * Also watch out for end of this block and the end of the whole | |
675 | * transfer. | |
676 | */ | |
677 | while (i < 512 && (int)ptob(npf)+i < bp->b_bcount && bit > -11) { | |
678 | addr = ptob(ubp->uba_map[reg+btop(byte)].pg_pfnum)+ | |
679 | (byte & PGOFSET); | |
680 | putmemc(addr, getmemc(addr)^(mask<<bit)); | |
681 | byte++; | |
682 | i++; | |
683 | bit -= 8; | |
008c0481 | 684 | } |
3f3a34c3 | 685 | um->um_tab.b_active++; /* Either complete or continuing... */ |
008c0481 BJ |
686 | if (up->upwc == 0) |
687 | return (0); | |
7bc8d985 BJ |
688 | /* |
689 | * Have to continue the transfer... clear the drive, | |
690 | * and compute the position where the transfer is to continue. | |
691 | * We have completed npf+1 sectors of the transfer already; | |
692 | * restart at offset o of next sector (i.e. in UBA register reg+1). | |
693 | */ | |
2601dfbd BJ |
694 | #ifdef notdef |
695 | up->uper1 = 0; | |
696 | up->upcs1 |= UP_GO; | |
697 | #else | |
698 | up->upcs1 = UP_TRE|UP_IE|UP_DCLR|UP_GO; | |
008c0481 | 699 | bn = dkblock(bp); |
3f3a34c3 | 700 | st = &upst[ui->ui_type]; |
008c0481 | 701 | cn = bp->b_cylin; |
3f3a34c3 BJ |
702 | sn = bn%st->nspc + npf + 1; |
703 | tn = sn/st->nsect; | |
704 | sn %= st->nsect; | |
705 | cn += tn/st->ntrak; | |
706 | tn %= st->ntrak; | |
008c0481 | 707 | up->updc = cn; |
7bc8d985 BJ |
708 | up->upda = (tn << 8) | sn; |
709 | ubaddr = (int)ptob(reg+1) + o; | |
710 | up->upba = ubaddr; | |
711 | cmd = (ubaddr >> 8) & 0x300; | |
2601dfbd | 712 | cmd |= UP_IE|UP_GO|UP_RCOM; |
7bc8d985 | 713 | up->upcs1 = cmd; |
2601dfbd | 714 | #endif |
008c0481 BJ |
715 | return (1); |
716 | } | |
977c2848 BJ |
717 | |
718 | /* | |
719 | * Reset driver after UBA init. | |
720 | * Cancel software state of all pending transfers | |
721 | * and restart all units and the controller. | |
722 | */ | |
3f3a34c3 | 723 | upreset(uban) |
f6d201ff | 724 | int uban; |
977c2848 | 725 | { |
89bd2f01 BJ |
726 | register struct uba_ctlr *um; |
727 | register struct uba_device *ui; | |
3f3a34c3 BJ |
728 | register sc21, unit; |
729 | ||
a3cb8f60 | 730 | for (sc21 = 0; sc21 < NSC; sc21++) { |
7e00c42b BJ |
731 | if ((um = upminfo[sc21]) == 0 || um->um_ubanum != uban || |
732 | um->um_alive == 0) | |
3f3a34c3 | 733 | continue; |
f6d201ff | 734 | printf(" sc%d", sc21); |
3f3a34c3 BJ |
735 | um->um_tab.b_active = 0; |
736 | um->um_tab.b_actf = um->um_tab.b_actl = 0; | |
f6d201ff | 737 | up_softc[sc21].sc_recal = 0; |
b7333467 BJ |
738 | if (um->um_ubinfo) { |
739 | printf("<%d>", (um->um_ubinfo>>28)&0xf); | |
0801d37f | 740 | ubadone(um); |
3f3a34c3 | 741 | } |
2601dfbd | 742 | ((struct updevice *)(um->um_addr))->upcs2 = UP_CLR; |
3f3a34c3 BJ |
743 | for (unit = 0; unit < NUP; unit++) { |
744 | if ((ui = updinfo[unit]) == 0) | |
745 | continue; | |
f6d201ff | 746 | if (ui->ui_alive == 0 || ui->ui_mi != um) |
3f3a34c3 BJ |
747 | continue; |
748 | uputab[unit].b_active = 0; | |
749 | (void) upustart(ui); | |
750 | } | |
751 | (void) upstart(um); | |
977c2848 | 752 | } |
977c2848 | 753 | } |
6a81870e BJ |
754 | |
755 | /* | |
756 | * Wake up every second and if an interrupt is pending | |
757 | * but nothing has happened increment a counter. | |
f6d201ff | 758 | * If nothing happens for 20 seconds, reset the UNIBUS |
6a81870e BJ |
759 | * and begin anew. |
760 | */ | |
761 | upwatch() | |
762 | { | |
89bd2f01 | 763 | register struct uba_ctlr *um; |
3f3a34c3 | 764 | register sc21, unit; |
7e00c42b | 765 | register struct up_softc *sc; |
6a81870e | 766 | |
7780575a | 767 | timeout(upwatch, (caddr_t)0, hz); |
a3cb8f60 | 768 | for (sc21 = 0; sc21 < NSC; sc21++) { |
3f3a34c3 | 769 | um = upminfo[sc21]; |
7e00c42b BJ |
770 | if (um == 0 || um->um_alive == 0) |
771 | continue; | |
772 | sc = &up_softc[sc21]; | |
3f3a34c3 BJ |
773 | if (um->um_tab.b_active == 0) { |
774 | for (unit = 0; unit < NUP; unit++) | |
2601dfbd BJ |
775 | if (uputab[unit].b_active && |
776 | updinfo[unit]->ui_mi == um) | |
3f3a34c3 | 777 | goto active; |
7e00c42b | 778 | sc->sc_wticks = 0; |
3f3a34c3 BJ |
779 | continue; |
780 | } | |
f6d201ff | 781 | active: |
7e00c42b BJ |
782 | sc->sc_wticks++; |
783 | if (sc->sc_wticks >= 20) { | |
784 | sc->sc_wticks = 0; | |
f6d201ff | 785 | printf("sc%d: lost interrupt\n", sc21); |
a3cb8f60 | 786 | ubareset(um->um_ubanum); |
3f3a34c3 | 787 | } |
6a81870e BJ |
788 | } |
789 | } | |
0ff318b2 BJ |
790 | |
791 | #define DBSIZE 20 | |
792 | ||
793 | updump(dev) | |
794 | dev_t dev; | |
795 | { | |
2601dfbd | 796 | struct updevice *upaddr; |
0ff318b2 | 797 | char *start; |
a0eab615 | 798 | int num, blk, unit; |
0ff318b2 | 799 | struct size *sizes; |
3f3a34c3 | 800 | register struct uba_regs *uba; |
89bd2f01 | 801 | register struct uba_device *ui; |
0ff318b2 | 802 | register short *rp; |
3f3a34c3 | 803 | struct upst *st; |
0ff318b2 | 804 | |
0ff318b2 | 805 | unit = minor(dev) >> 3; |
0c48c799 BJ |
806 | if (unit >= NUP) |
807 | return (ENXIO); | |
7e00c42b | 808 | #define phys(cast, addr) ((cast)((int)addr & 0x7fffffff)) |
89bd2f01 | 809 | ui = phys(struct uba_device *, updinfo[unit]); |
0c48c799 BJ |
810 | if (ui->ui_alive == 0) |
811 | return (ENXIO); | |
3f3a34c3 | 812 | uba = phys(struct uba_hd *, ui->ui_hd)->uh_physuba; |
89bd2f01 | 813 | ubainit(uba); |
2601dfbd | 814 | upaddr = (struct updevice *)ui->ui_physaddr; |
89bd2f01 | 815 | DELAY(2000000); |
3f3a34c3 BJ |
816 | num = maxfree; |
817 | start = 0; | |
0ff318b2 | 818 | upaddr->upcs2 = unit; |
89bd2f01 BJ |
819 | DELAY(100); |
820 | if ((upaddr->upcs1&UP_DVA) == 0) | |
821 | return (EFAULT); | |
2601dfbd BJ |
822 | if ((upaddr->upds & UP_VV) == 0) { |
823 | upaddr->upcs1 = UP_DCLR|UP_GO; | |
824 | upaddr->upcs1 = UP_PRESET|UP_GO; | |
825 | upaddr->upof = UP_FMT22; | |
0ff318b2 | 826 | } |
0c48c799 BJ |
827 | if ((upaddr->upds & UP_DREADY) != UP_DREADY) |
828 | return (EFAULT); | |
7e00c42b | 829 | st = &upst[ui->ui_type]; |
3f3a34c3 | 830 | sizes = phys(struct size *, st->sizes); |
0c48c799 BJ |
831 | if (dumplo < 0 || dumplo + num >= sizes[minor(dev)&07].nblocks) |
832 | return (EINVAL); | |
0ff318b2 BJ |
833 | while (num > 0) { |
834 | register struct pte *io; | |
835 | register int i; | |
836 | int cn, sn, tn; | |
837 | daddr_t bn; | |
838 | ||
839 | blk = num > DBSIZE ? DBSIZE : num; | |
3f3a34c3 | 840 | io = uba->uba_map; |
0ff318b2 | 841 | for (i = 0; i < blk; i++) |
89bd2f01 | 842 | *(int *)io++ = (btop(start)+i) | (1<<21) | UBAMR_MRV; |
0ff318b2 BJ |
843 | *(int *)io = 0; |
844 | bn = dumplo + btop(start); | |
71236e46 BJ |
845 | cn = bn/st->nspc + sizes[minor(dev)&07].cyloff; |
846 | sn = bn%st->nspc; | |
847 | tn = sn/st->nsect; | |
848 | sn = sn%st->nsect; | |
0ff318b2 BJ |
849 | upaddr->updc = cn; |
850 | rp = (short *) &upaddr->upda; | |
851 | *rp = (tn << 8) + sn; | |
852 | *--rp = 0; | |
853 | *--rp = -blk*NBPG / sizeof (short); | |
2601dfbd | 854 | *--rp = UP_GO|UP_WCOM; |
0ff318b2 BJ |
855 | do { |
856 | DELAY(25); | |
2601dfbd | 857 | } while ((upaddr->upcs1 & UP_RDY) == 0); |
0c48c799 BJ |
858 | if (upaddr->upcs1&UP_ERR) |
859 | return (EIO); | |
0ff318b2 BJ |
860 | start += blk*NBPG; |
861 | num -= blk; | |
862 | } | |
0ff318b2 BJ |
863 | return (0); |
864 | } | |
63c35a63 | 865 | #endif |