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[unix-history] / usr / src / sys / vax / mba / hp.c
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1/* hp.c 4.26 81/03/09 */
2
3#include "hp.h"
4#if NHP > 0
5/*
6 * HP disk driver for RP0x+RM0x
7 *
8 * TODO:
9 * check RM80 skip sector handling, esp when ECC's occur later
10 * add reading of bad sector information and disk layout from sector 1
11 * add bad sector forwarding code
12 * check interaction with tape driver on same mba
13 * check multiple drive handling
14 * check offset recovery handling
15 * see if DCLR and/or RELEASE set attention status
16 */
17
18#include "../h/param.h"
19#include "../h/systm.h"
20#include "../h/dk.h"
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"
26#include "../h/pte.h"
27#include "../h/mbareg.h"
28#include "../h/mbavar.h"
29#include "../h/mtpr.h"
30#include "../h/vm.h"
31#include "../h/cmap.h"
32
33#include "../h/hpreg.h"
34
35/* THIS SHOULD BE READ OFF THE PACK, PER DRIVE */
36struct size {
37 daddr_t nblocks;
38 int cyloff;
39} hp_sizes[8] = {
40 15884, 0, /* A=cyl 0 thru 37 */
41 33440, 38, /* B=cyl 38 thru 117 */
42 340670, 0, /* C=cyl 0 thru 814 */
43 0, 0,
44 0, 0,
45 0, 0,
46 291346, 118, /* G=cyl 118 thru 814 */
47 0, 0,
48}, rm_sizes[8] = {
49 15884, 0, /* A=cyl 0 thru 99 */
50 33440, 100, /* B=cyl 100 thru 309 */
51 131680, 0, /* C=cyl 0 thru 822 */
52 2720, 291,
53 0, 0,
54 0, 0,
55 82080, 310, /* G=cyl 310 thru 822 */
56 0, 0,
57}, rm5_sizes[8] = {
58 15884, 0, /* A=cyl 0 thru 26 */
59 33440, 27, /* B=cyl 27 thru 81 */
60 500992, 0, /* C=cyl 0 thru 823 */
61 15884, 562, /* D=cyl 562 thru 588 */
62 55936, 589, /* E=cyl 589 thru 680 */
63 86944, 681, /* F=cyl 681 thru 823 */
64 159296, 562, /* G=cyl 562 thru 823 */
65 291346, 82, /* H=cyl 82 thru 561 */
66}, rm80_sizes[8] = {
67 15884, 0, /* A=cyl 0 thru 36 */
68 33440, 37, /* B=cyl 37 thru 114 */
69 242606, 0, /* C=cyl 0 thru 558 */
70 0, 0,
71 0, 0,
72 0, 0,
73 82080, 115, /* G=cyl 115 thru 304 */
74 110236, 305, /* H=cyl 305 thru 558 */
75};
76/* END OF STUFF WHICH SHOULD BE READ IN PER DISK */
77
78#define _hpSDIST 2
79#define _hpRDIST 3
80
81int hpSDIST = _hpSDIST;
82int hpRDIST = _hpRDIST;
83
84short hptypes[] =
85 { MBDT_RM03, MBDT_RM05, MBDT_RP06, MBDT_RM80, 0 };
86struct mba_device *hpinfo[NHP];
87int hpattach(),hpustart(),hpstart(),hpdtint();
88struct mba_driver hpdriver =
89 { hpattach, 0, hpustart, hpstart, hpdtint, 0,
90 hptypes, "hp", 0, hpinfo };
91
92struct hpst {
93 short nsect;
94 short ntrak;
95 short nspc;
96 short ncyl;
97 struct size *sizes;
98} hpst[] = {
99 32, 5, 32*5, 823, rm_sizes, /* RM03 */
100 32, 19, 32*19, 823, rm5_sizes, /* RM05 */
101 22, 19, 22*19, 815, hp_sizes, /* RP06 */
102 31, 14, 31*14, 559, rm80_sizes /* RM80 */
103};
104
105u_char hp_offset[16] = {
106 HPOF_P400, HPOF_M400, HPOF_P400, HPOF_M400,
107 HPOF_P800, HPOF_M800, HPOF_P800, HPOF_M800,
108 HPOF_P1200, HPOF_M1200, HPOF_P1200, HPOF_M1200,
109 0, 0, 0, 0,
110};
111
112struct buf rhpbuf[NHP];
113char hprecal[NHP];
114
115#define b_cylin b_resid
116
117#ifdef INTRLVE
118daddr_t dkblock();
119#endif
120
121int hpseek;
122
123/*ARGSUSED*/
124hpattach(mi, slave)
125 struct mba_device *mi;
126{
127 register struct hpst *st = &hpst[mi->mi_type];
128
129 if (mi->mi_dk >= 0)
130 dk_mspw[mi->mi_dk] = 1.0 / 60 / (st->nsect * 256);
131}
132
133hpstrategy(bp)
134 register struct buf *bp;
135{
136 register struct mba_device *mi;
137 register struct hpst *st;
138 register int unit;
139 long sz, bn;
140 int xunit = minor(bp->b_dev) & 07;
141
142 sz = bp->b_bcount;
143 sz = (sz+511) >> 9;
144 unit = dkunit(bp);
145 if (unit >= NHP)
146 goto bad;
147 mi = hpinfo[unit];
148 if (mi == 0 || mi->mi_alive == 0)
149 goto bad;
150 st = &hpst[mi->mi_type];
151 if (bp->b_blkno < 0 ||
152 (bn = dkblock(bp))+sz > st->sizes[xunit].nblocks)
153 goto bad;
154 bp->b_cylin = bn/st->nspc + st->sizes[xunit].cyloff;
155 (void) spl5();
156 disksort(&mi->mi_tab, bp);
157 if (mi->mi_tab.b_active == 0)
158 mbustart(mi);
159 (void) spl0();
160 return;
161
162bad:
163 bp->b_flags |= B_ERROR;
164 iodone(bp);
165 return;
166}
167
168hpustart(mi)
169 register struct mba_device *mi;
170{
171 register struct hpdevice *hpaddr = (struct hpdevice *)mi->mi_drv;
172 register struct buf *bp = mi->mi_tab.b_actf;
173 register struct hpst *st;
174 daddr_t bn;
175 int sn, dist;
176
177 if ((hpaddr->hpcs1&HP_DVA) == 0)
178 return (MBU_BUSY);
179 if ((hpaddr->hpds & HPDS_VV) == 0) {
180 hpaddr->hpcs1 = HP_DCLR|HP_GO;
181 hpaddr->hpcs1 = HP_PRESET|HP_GO;
182 hpaddr->hpof = HPOF_FMT22;
183 }
184 if (mi->mi_tab.b_active || mi->mi_hd->mh_ndrive == 1)
185 return (MBU_DODATA);
186 if ((hpaddr->hpds & HPDS_DREADY) != HPDS_DREADY)
187 return (MBU_DODATA);
188 st = &hpst[mi->mi_type];
189 bn = dkblock(bp);
190 sn = bn%st->nspc;
191 sn = (sn+st->nsect-hpSDIST)%st->nsect;
192 if (bp->b_cylin == (hpaddr->hpdc & 0xffff)) {
193 if (hpseek)
194 return (MBU_DODATA);
195 dist = ((hpaddr->hpla & 0xffff)>>6) - st->nsect + 1;
196 if (dist < 0)
197 dist += st->nsect;
198 if (dist > st->nsect - hpRDIST)
199 return (MBU_DODATA);
200 } else
201 hpaddr->hpdc = bp->b_cylin;
202 if (hpseek)
203 hpaddr->hpcs1 = HP_SEEK|HP_GO;
204 else {
205 hpaddr->hpda = sn;
206 hpaddr->hpcs1 = HP_SEARCH|HP_GO;
207 }
208 return (MBU_STARTED);
209}
210
211hpstart(mi)
212 register struct mba_device *mi;
213{
214 register struct hpdevice *hpaddr = (struct hpdevice *)mi->mi_drv;
215 register struct buf *bp = mi->mi_tab.b_actf;
216 register struct hpst *st = &hpst[mi->mi_type];
217 daddr_t bn;
218 int sn, tn;
219
220 bn = dkblock(bp);
221 sn = bn%st->nspc;
222 tn = sn/st->nsect;
223 sn %= st->nsect;
224 hpaddr->hpdc = bp->b_cylin;
225 hpaddr->hpda = (tn << 8) + sn;
226}
227
228hpdtint(mi, mbsr)
229 register struct mba_device *mi;
230 int mbsr;
231{
232 register struct hpdevice *hpaddr = (struct hpdevice *)mi->mi_drv;
233 register struct buf *bp = mi->mi_tab.b_actf;
234 int retry = 0;
235
236 if (hpaddr->hpds&HPDS_ERR || mbsr&MBSR_EBITS) {
237 if (hpaddr->hper1&HPER1_WLE) {
238 printf("hp%d: write locked\n", dkunit(bp));
239 bp->b_flags |= B_ERROR;
240 } else if (++mi->mi_tab.b_errcnt > 27 ||
241 mbsr & MBSR_HARD ||
242 hpaddr->hper1 & HPER1_HARD ||
243 hpaddr->hper2 & HPER2_HARD) {
244 harderr(bp, "hp");
245 printf("mbsr=%b er1=%b er2=%b\n",
246 mbsr, mbsr_bits,
247 hpaddr->hper1, HPER1_BITS,
248 hpaddr->hper2, HPER2_BITS);
249 bp->b_flags |= B_ERROR;
250 } else if (hpaddr->hper2&HPER2_SSE) {
251 hpecc(mi, 1);
252 return (MBD_RESTARTED);
253 } else if ((hpaddr->hper1&(HPER1_DCK|HPER1_ECH))==HPER1_DCK) {
254 if (hpecc(mi, 0))
255 return (MBD_RESTARTED);
256 /* else done */
257 } else
258 retry = 1;
259 hpaddr->hpcs1 = HP_DCLR|HP_GO;
260 if ((mi->mi_tab.b_errcnt&07) == 4) {
261 hpaddr->hpcs1 = HP_RECAL|HP_GO;
262 hprecal[mi->mi_unit] = 0;
263 goto nextrecal;
264 }
265 if (retry)
266 return (MBD_RETRY);
267 }
268 switch (hprecal[mi->mi_unit]) {
269
270 case 1:
271 hpaddr->hpdc = bp->b_cylin;
272 hpaddr->hpcs1 = HP_SEEK|HP_GO;
273 goto nextrecal;
274 case 2:
275 if (mi->mi_tab.b_errcnt < 16 ||
276 (bp->b_flags & B_READ) != 0)
277 goto donerecal;
278 hpaddr->hpof = hp_offset[mi->mi_tab.b_errcnt & 017]|HPOF_FMT22;
279 hpaddr->hpcs1 = HP_OFFSET|HP_GO;
280 goto nextrecal;
281 nextrecal:
282 hprecal[mi->mi_unit]++;
283 return (MBD_RESTARTED);
284 donerecal:
285 hprecal[mi->mi_unit] = 0;
286 return (MBD_RETRY);
287 }
288 bp->b_resid = -(mi->mi_mba->mba_bcr) & 0xffff;
289 if (mi->mi_tab.b_errcnt > 16) {
290 /*
291 * This is fast and occurs rarely; we don't
292 * bother with interrupts.
293 */
294 hpaddr->hpcs1 = HP_RTC|HP_GO;
295 while (hpaddr->hpds & HPDS_PIP)
296 ;
297 mbclrattn(mi);
298 }
299 hpaddr->hpcs1 = HP_RELEASE|HP_GO;
300 return (MBD_DONE);
301}
302
303hpread(dev)
304 dev_t dev;
305{
306 register int unit = minor(dev) >> 3;
307
308 if (unit >= NHP)
309 u.u_error = ENXIO;
310 else
311 physio(hpstrategy, &rhpbuf[unit], dev, B_READ, minphys);
312}
313
314hpwrite(dev)
315 dev_t dev;
316{
317 register int unit = minor(dev) >> 3;
318
319 if (unit >= NHP)
320 u.u_error = ENXIO;
321 else
322 physio(hpstrategy, &rhpbuf[unit], dev, B_WRITE, minphys);
323}
324
325/*ARGSUSED*/
326hpecc(mi, rm80sse)
327 register struct mba_device *mi;
328 int rm80sse;
329{
330 register struct mba_regs *mbp = mi->mi_mba;
331 register struct hpdevice *rp = (struct hpdevice *)mi->mi_drv;
332 register struct buf *bp = mi->mi_tab.b_actf;
333 register struct hpst *st;
334 register int i;
335 caddr_t addr;
336 int reg, bit, byte, npf, mask, o;
337 int bn, cn, tn, sn;
338 struct pte mpte;
339 int bcr;
340
341 bcr = mbp->mba_bcr & 0xffff;
342 if (bcr)
343 bcr |= 0xffff0000; /* sxt */
344 npf = btop(bcr + bp->b_bcount) - 1;
345 reg = npf;
346 if (rm80sse) {
347 rp->hpof |= HPOF_SSEI;
348 reg--; /* compensate in advance for reg+1 below */
349 goto sse;
350 }
351 o = (int)bp->b_un.b_addr & PGOFSET;
352 printf("hp%d%c: soft ecc sn%d\n", dkunit(bp),
353 'a'+(minor(bp->b_dev)&07), bp->b_blkno + npf);
354 mask = rp->hpec2&0xffff;
355 i = (rp->hpec1&0xffff) - 1; /* -1 makes 0 origin */
356 bit = i&07;
357 i = (i&~07)>>3;
358 byte = i + o;
359 while (i < 512 && (int)ptob(npf)+i < bp->b_bcount && bit > -11) {
360 mpte = mbp->mba_map[reg+btop(byte)];
361 addr = ptob(mpte.pg_pfnum) + (byte & PGOFSET);
362 putmemc(addr, getmemc(addr)^(mask<<bit));
363 byte++;
364 i++;
365 bit -= 8;
366 }
367 if (bcr == 0)
368 return (0);
369#ifdef notdef
370sse:
371 if (rpof&HPOF_SSEI)
372 rp->hpda = rp->hpda + 1;
373 rp->hper1 = 0;
374 rp->hpcs1 = HP_RCOM|HP_GO;
375#else
376sse:
377 rp->hpcs1 = HP_DCLR|HP_GO;
378 bn = dkblock(bp);
379 st = &hpst[mi->mi_type];
380 cn = bp->b_cylin;
381 sn = bn%(st->nspc) + npf + 1;
382 tn = sn/st->nsect;
383 sn %= st->nsect;
384 cn += tn/st->ntrak;
385 tn %= st->ntrak;
386#ifdef notdef
387 if (rp->hpof&SSEI)
388 sn++;
389#endif
390 rp->hpdc = cn;
391 rp->hpda = (tn<<8) + sn;
392 mbp->mba_sr = -1;
393 mbp->mba_var = (int)ptob(reg+1) + o;
394 rp->hpcs1 = HP_RCOM|HP_GO;
395#endif
396 return (1);
397}
398
399#define DBSIZE 20
400
401hpdump(dev)
402 dev_t dev;
403{
404 register struct mba_device *mi;
405 register struct mba_regs *mba;
406 struct hpdevice *hpaddr;
407 char *start;
408 int num, unit;
409 register struct hpst *st;
410
411 num = maxfree;
412 start = 0;
413 unit = minor(dev) >> 3;
414 if (unit >= NHP)
415 return (ENXIO);
416#define phys(a,b) ((b)((int)(a)&0x7fffffff))
417 mi = phys(hpinfo[unit],struct mba_device *);
418 if (mi == 0 || mi->mi_alive == 0)
419 return (ENXIO);
420 mba = phys(mi->mi_hd, struct mba_hd *)->mh_physmba;
421 mba->mba_cr = MBCR_INIT;
422 hpaddr = (struct hpdevice *)&mba->mba_drv[mi->mi_drive];
423 if ((hpaddr->hpds & HPDS_VV) == 0) {
424 hpaddr->hpcs1 = HP_DCLR|HP_GO;
425 hpaddr->hpcs1 = HP_PRESET|HP_GO;
426 hpaddr->hpof = HPOF_FMT22;
427 }
428 st = &hpst[mi->mi_type];
429 if (dumplo < 0 || dumplo + num >= st->sizes[minor(dev)&07].nblocks)
430 return (EINVAL);
431 while (num > 0) {
432 register struct pte *hpte = mba->mba_map;
433 register int i;
434 int blk, cn, sn, tn;
435 daddr_t bn;
436
437 blk = num > DBSIZE ? DBSIZE : num;
438 bn = dumplo + btop(start);
439 cn = bn/st->nspc + st->sizes[minor(dev)&07].cyloff;
440 sn = bn%st->nspc;
441 tn = sn/st->nsect;
442 sn = sn%st->nsect;
443 hpaddr->hpdc = cn;
444 hpaddr->hpda = (tn << 8) + sn;
445 for (i = 0; i < blk; i++)
446 *(int *)hpte++ = (btop(start)+i) | PG_V;
447 mba->mba_sr = -1;
448 mba->mba_bcr = -(blk*NBPG);
449 mba->mba_var = 0;
450 hpaddr->hpcs1 = HP_WCOM | HP_GO;
451 while ((hpaddr->hpds & HPDS_DRY) == 0)
452 ;
453 if (hpaddr->hpds&HPDS_ERR)
454 return (EIO);
455 start += blk*NBPG;
456 num -= blk;
457 }
458 return (0);
459}
460#endif
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.