1 /* hp.c 6.6 85/03/27 */ 2 3 /* 4 * RP??/RM?? disk driver 5 * with ECC handling and bad block forwarding. 6 * Also supports header io operations and 7 * commands to write check header and data. 8 */ 9 #include "../h/param.h" 10 #include "../h/inode.h" 11 #include "../h/fs.h" 12 #include "../h/dkbad.h" 13 14 #include "../vax/pte.h" 15 #include "../vaxmba/hpreg.h" 16 #include "../vaxmba/mbareg.h" 17 18 #include "saio.h" 19 #include "savax.h" 20 21 #define MASKREG(reg) ((reg)&0xffff) 22 23 #define MAXBADDESC 126 24 #define SECTSIZ 512 /* sector size in bytes */ 25 #define HDRSIZ 4 /* number of bytes in sector header */ 26 #define MAXECC 5 /* max # bits allow in ecc error w/ F_ECCLM */ 27 28 char hp_type[MAXNMBA*8] = { 0 }; 29 extern struct st hpst[]; 30 31 short hptypes[] = { 32 MBDT_RM03, 33 MBDT_RM05, 34 MBDT_RP06, 35 MBDT_RM80, 36 MBDT_RP05, 37 MBDT_RP07, 38 MBDT_ML11A, 39 MBDT_ML11B, 40 -1, /* 9755 */ 41 -1, /* 9730 */ 42 -1, /* Capricorn */ 43 -1, /* Eagle */ 44 MBDT_RM02, /* actually something else */ 45 -1, /* 9300 */ 46 0 47 }; 48 49 #define RP06 (hptypes[hp_type[unit]] <= MBDT_RP06) 50 #define ML11 (hptypes[hp_type[unit]] == MBDT_ML11A) 51 #define RM80 (hptypes[hp_type[unit]] == MBDT_RM80) 52 53 u_char hp_offset[16] = { 54 HPOF_P400, HPOF_M400, HPOF_P400, HPOF_M400, 55 HPOF_P800, HPOF_M800, HPOF_P800, HPOF_M800, 56 HPOF_P1200, HPOF_M1200, HPOF_P1200, HPOF_M1200, 57 0, 0, 0, 0, 58 }; 59 60 struct dkbad hpbad[MAXNMBA*8]; 61 int ssect[MAXNMBA*8]; /* 1 when on track w/skip sector */ 62 63 int hpdebug[MAXNMBA*8]; 64 #define HPF_BSEDEBUG 01 /* debugging bad sector forwarding */ 65 #define HPF_ECCDEBUG 02 /* debugging ecc correction */ 66 67 int sectsiz; 68 69 /* 70 * When awaiting command completion, don't 71 * hang on to the status register since 72 * this ties up some controllers. 73 */ 74 #define HPWAIT(addr) \ 75 while ((((addr)->hpds)&HPDS_DRY)==0) DELAY(500); 76 77 hpopen(io) 78 register struct iob *io; 79 { 80 register unit = io->i_unit; 81 struct hpdevice *hpaddr = (struct hpdevice *)mbadrv(unit); 82 register struct st *st; 83 84 mbainit(UNITTOMBA(unit)); 85 if (hp_type[unit] == 0) { 86 register i, type = hpaddr->hpdt & MBDT_TYPE; 87 struct iob tio; 88 89 for (i = 0; hptypes[i]; i++) 90 if (hptypes[i] == type) 91 goto found; 92 _stop("unknown drive type"); 93 found: 94 hpaddr->hpcs1 = HP_DCLR|HP_GO; /* init drive */ 95 hpaddr->hpcs1 = HP_PRESET|HP_GO; 96 if (!ML11) 97 hpaddr->hpof = HPOF_FMT22; 98 hp_type[unit] = hpmaptype(hpaddr, i, UNITTODRIVE(unit)); 99 /* 100 * Read in the bad sector table. 101 */ 102 st = &hpst[hp_type[unit]]; 103 tio = *io; 104 tio.i_bn = st->nspc * st->ncyl - st->nsect; 105 tio.i_ma = (char *)&hpbad[unit]; 106 tio.i_cc = sizeof (struct dkbad); 107 tio.i_flgs |= F_RDDATA; 108 for (i = 0; i < 5; i++) { 109 if (hpstrategy(&tio, READ) == sizeof (struct dkbad)) 110 break; 111 tio.i_bn += 2; 112 } 113 if (i == 5) { 114 printf("Unable to read bad sector table\n"); 115 for (i = 0; i < MAXBADDESC; i++) { 116 hpbad[unit].bt_bad[i].bt_cyl = -1; 117 hpbad[unit].bt_bad[i].bt_trksec = -1; 118 } 119 } 120 } 121 st = &hpst[hp_type[unit]]; 122 if (io->i_boff < 0 || io->i_boff > 7 || 123 st->off[io->i_boff]== -1) 124 _stop("hp bad minor"); 125 io->i_boff = st->off[io->i_boff] * st->nspc; 126 } 127 128 hpstrategy(io, func) 129 register struct iob *io; 130 { 131 register unit = io->i_unit; 132 struct mba_regs *mba = mbamba(unit); 133 daddr_t bn, startblock; 134 struct hpdevice *hpaddr = (struct hpdevice *)mbadrv(unit); 135 struct st *st = &hpst[hp_type[unit]]; 136 int cn, tn, sn, bytecnt, bytesleft; 137 char *membase; 138 int er1, er2, hprecal; 139 140 sectsiz = SECTSIZ; 141 if ((io->i_flgs & (F_HDR|F_HCHECK)) != 0) 142 sectsiz += HDRSIZ; 143 if ((hpaddr->hpds & HPDS_VV) == 0) { 144 hpaddr->hpcs1 = HP_DCLR|HP_GO; 145 hpaddr->hpcs1 = HP_PRESET|HP_GO; 146 if (!ML11) 147 hpaddr->hpof = HPOF_FMT22; 148 } 149 io->i_errcnt = 0; 150 ssect[unit] = 0; 151 bytecnt = io->i_cc; 152 membase = io->i_ma; 153 startblock = io->i_bn; 154 hprecal = 0; 155 156 restart: 157 bn = io->i_bn; 158 cn = bn/st->nspc; 159 sn = bn%st->nspc; 160 tn = sn/st->nsect; 161 sn = sn%st->nsect + ssect[unit]; 162 163 HPWAIT(hpaddr); 164 mba->mba_sr = -1; 165 if (ML11) 166 hpaddr->hpda = bn; 167 else { 168 hpaddr->hpdc = cn; 169 hpaddr->hpda = (tn << 8) + sn; 170 } 171 if (mbastart(io, func) != 0) /* start transfer */ 172 return (-1); 173 HPWAIT(hpaddr); 174 /* 175 * Successful data transfer, return. 176 */ 177 if ((hpaddr->hpds&HPDS_ERR) == 0 && (mba->mba_sr&MBSR_EBITS) == 0) 178 goto done; 179 180 /* 181 * Error handling. Calculate location of error. 182 */ 183 bytesleft = MASKREG(mba->mba_bcr); 184 if (bytesleft) 185 bytesleft |= 0xffff0000; /* sxt */ 186 bn = io->i_bn + (io->i_cc + bytesleft) / sectsiz; 187 er1 = MASKREG(hpaddr->hper1); 188 er2 = MASKREG(hpaddr->hper2); 189 if (er1 & (HPER1_DCK|HPER1_ECH)) 190 bn--; /* Error is in Prev block */ 191 cn = bn/st->nspc; 192 sn = bn%st->nspc; 193 tn = sn/st->nsect; 194 sn = sn%st->nsect; 195 if (hpdebug[unit] & (HPF_ECCDEBUG|HPF_BSEDEBUG)) { 196 printf("hp error: (cyl,trk,sec)=(%d,%d,%d) ds=%b\n", 197 cn, tn, sn, MASKREG(hpaddr->hpds), HPDS_BITS); 198 printf("er1=%b er2=%b\n", er1, HPER1_BITS, er2, HPER2_BITS); 199 printf("bytes left: %d, of 0x%x, da 0x%x\n",-bytesleft, 200 hpaddr->hpof, hpaddr->hpda); 201 } 202 if (er1 & HPER1_HCRC) { 203 er1 &= ~(HPER1_HCE|HPER1_FER); 204 er2 &= ~HPER2_BSE; 205 } 206 /* 207 * Give up early if drive write locked. 208 */ 209 if (er1&HPER1_WLE) { 210 printf("hp%d: write locked\n", unit); 211 return (-1); 212 } 213 /* 214 * Interpret format error bit as a bad block on RP06's. 215 */ 216 if (MASKREG(er1) == HPER1_FER && RP06) 217 goto badsect; 218 219 /* 220 * If a hard error, or maximum retry count 221 * exceeded, clear controller state and 222 * pass back error to caller. 223 */ 224 if (++io->i_errcnt > 27 || (er1 & HPER1_HARD) || 225 (!ML11 && (er2 & HPER2_HARD))) { 226 /* 227 * The last ditch effort to bad sector forward 228 * below will probably fail since mba byte ctr 229 * (bcr) is different for BSE and ECC errors and 230 * the wrong block will be revectored to if one 231 * has 2 contiguous bad blocks and reads the second. 232 * For now, we can probably just let a header CRC 233 * error be handled like a BSE since no data will 234 * have been transferred and the bcr should the same 235 * as it would with a BSE error. 236 * --ghg. 237 */ 238 if (er1 & HPER1_HCRC) 239 if ((io->i_flgs&F_NBSF) == 0 && hpecc(io, BSE) == 0) 240 goto success; 241 hard0: 242 io->i_error = EHER; 243 if (mba->mba_sr & (MBSR_WCKUP|MBSR_WCKLWR)) 244 io->i_error = EWCK; 245 hard: 246 io->i_errblk = bn + ssect[unit]; 247 printf("hp error: (cyl,trk,sec)=(%d,%d,%d) ds=%b \n", 248 cn, tn, sn, MASKREG(hpaddr->hpds), HPDS_BITS); 249 printf("er1=%b er2=%b", er1, HPER1_BITS, er2, HPER2_BITS); 250 if (hpaddr->hpmr) 251 printf(" mr1=%o", MASKREG(hpaddr->hpmr)); 252 if (hpaddr->hpmr2) 253 printf(" mr2=%o", MASKREG(hpaddr->hpmr2)); 254 if (hpdebug[unit] & (HPF_BSEDEBUG|HPF_ECCDEBUG)) 255 printf(" dc=%d, da=0x%x",MASKREG(hpaddr->hpdc), 256 MASKREG(hpaddr->hpda)); 257 hpaddr->hpcs1 = HP_DCLR|HP_GO; 258 printf("\n"); 259 bytecnt = -1; 260 goto done; 261 262 } 263 /* 264 * Attempt to forward bad sectors on 265 * anything but an ML11. 266 */ 267 if ((er2 & HPER2_BSE) && !ML11) { 268 badsect: 269 if (!ssect[unit] && (er2&HPER2_SSE)) 270 goto skipsect; 271 if (io->i_flgs & F_NBSF) { 272 io->i_error = EBSE; 273 goto hard; 274 } 275 if (hpecc(io, BSE) == 0) 276 goto success; 277 io->i_error = EBSE; 278 goto hard; 279 } 280 /* 281 * Skip sector handling. 282 */ 283 if (RM80 && (er2 & HPER2_SSE)) { 284 skipsect: 285 (void) hpecc(io, SSE); 286 ssect[unit] = 1; 287 goto restart; 288 } 289 /* 290 * ECC correction? 291 */ 292 if ((er1 & (HPER1_DCK|HPER1_ECH)) == HPER1_DCK) { 293 if (hpecc(io, ECC) == 0) 294 goto success; 295 io->i_error = EECC; 296 io->i_errblk = bn + ssect[unit]; 297 return (-1); 298 } 299 #ifdef F_SEVRE 300 if (io->i_flgs & F_SEVRE) 301 goto hard; 302 #endif 303 if (ML11 && (io->i_errcnt >= 16)) 304 goto hard0; 305 /* fall thru to retry */ 306 hpaddr->hpcs1 = HP_DCLR|HP_GO; 307 HPWAIT(hpaddr); 308 309 /* 310 * Every fourth retry recalibrate. 311 */ 312 if (((io->i_errcnt & 07) == 4) ) { 313 hpaddr->hpcs1 = HP_RECAL|HP_GO; 314 HPWAIT(hpaddr); 315 hpaddr->hpdc = cn; 316 hpaddr->hpcs1 = HP_SEEK|HP_GO; 317 HPWAIT(hpaddr); 318 } 319 320 if (io->i_errcnt >= 16 && (io->i_flgs & F_READ)) { 321 hpaddr->hpof = hp_offset[io->i_errcnt & 017]|HPOF_FMT22; 322 hpaddr->hpcs1 = HP_OFFSET|HP_GO; 323 HPWAIT(hpaddr); 324 } 325 if (hpdebug[unit] & (HPF_ECCDEBUG|HPF_BSEDEBUG)) 326 printf("restart: bn=%d, cc=%d, ma=0x%x hprecal=%d\n", 327 io->i_bn, io->i_cc, io->i_ma, hprecal); 328 goto restart; /* retry whole transfer --ghg */ 329 330 success: 331 /* 332 * On successful error recovery, bump 333 * block number to advance to next portion 334 * of i/o transfer. 335 */ 336 bn++; 337 if ((bn-startblock) * sectsiz < bytecnt) { 338 io->i_bn = bn; 339 io->i_ma = membase + (io->i_bn - startblock)*sectsiz; 340 io->i_cc = bytecnt - (io->i_bn - startblock)*sectsiz; 341 if (hpdebug[unit] & (HPF_ECCDEBUG|HPF_BSEDEBUG)) 342 printf("restart: bn=%d, cc=%d, ma=0x%x hprecal=%d\n", 343 io->i_bn, io->i_cc, io->i_ma, hprecal); 344 goto restart; 345 } 346 done: 347 if (io->i_errcnt >= 16) { 348 hpaddr->hpcs1 = HP_RTC|HP_GO; 349 while (hpaddr->hpds & HPDS_PIP) 350 ; 351 } 352 io->i_cc = bytecnt; /*reset i_cc to total count xfered*/ 353 return (bytecnt); 354 } 355 356 hpecc(io, flag) 357 register struct iob *io; 358 int flag; 359 { 360 register unit = io->i_unit; 361 register struct mba_regs *mbp = mbamba(unit); 362 register struct hpdevice *rp = (struct hpdevice *)mbadrv(unit); 363 register struct st *st = &hpst[hp_type[unit]]; 364 int npf, bn, cn, tn, sn, bcr; 365 366 bcr = MASKREG(mbp->mba_bcr); 367 if (bcr) 368 bcr |= 0xffff0000; /* sxt */ 369 npf = (bcr + io->i_cc) / sectsiz; /* # sectors read */ 370 if (flag == ECC) 371 npf--; /* Error is in prev block --ghg */ 372 bn = io->i_bn + npf + ssect[unit]; /* physical block #*/ 373 if (hpdebug[unit]&HPF_ECCDEBUG) 374 printf("bcr=%d npf=%d ssect=%d sectsiz=%d i_cc=%d\n", 375 bcr, npf, ssect[unit], sectsiz, io->i_cc); 376 /* 377 * ECC correction logic. 378 */ 379 if (flag == ECC) { 380 register int i; 381 caddr_t addr; 382 int bit, o, mask, ecccnt = 0; 383 384 printf("hp%d: soft ecc sn%d\n", unit, bn); 385 mask = MASKREG(rp->hpec2); 386 i = MASKREG(rp->hpec1) - 1; /* -1 makes 0 origin */ 387 bit = i&07; 388 o = (i & ~07) >> 3; 389 rp->hpcs1 = HP_DCLR | HP_GO; 390 while (o <sectsiz && npf*sectsiz + o < io->i_cc && bit > -11) { 391 addr = io->i_ma + (npf*sectsiz) + o; 392 /* 393 * No data transfer occurs with a write check, 394 * so don't correct the resident copy of data. 395 */ 396 if ((io->i_flgs & (F_CHECK|F_HCHECK)) == 0) { 397 if (hpdebug[unit] & HPF_ECCDEBUG) 398 printf("addr=%x old=%x ", addr, 399 (*addr & 0xff)); 400 *addr ^= (mask << bit); 401 if (hpdebug[unit] & HPF_ECCDEBUG) 402 printf("new=%x\n",(*addr & 0xff)); 403 } 404 o++, bit -= 8; 405 if ((io->i_flgs & F_ECCLM) && ecccnt++ >= MAXECC) 406 return (1); 407 } 408 #ifdef F_SEVRE 409 if (io->i_flgs & F_SEVRE) 410 return(1); 411 #endif 412 return (0); 413 } 414 415 /* 416 * Skip sector error. 417 * Set skip-sector-inhibit and 418 * read next sector 419 */ 420 if (flag == SSE) { 421 rp->hpcs1 = HP_DCLR | HP_GO; 422 HPWAIT(rp); 423 rp->hpof |= HPOF_SSEI; 424 return (0); 425 } 426 427 /* 428 * Bad block forwarding. 429 */ 430 if (flag == BSE) { 431 int bbn; 432 433 rp->hpcs1 = HP_DCLR | HP_GO; 434 if (hpdebug[unit] & HPF_BSEDEBUG) 435 printf("hpecc: BSE @ bn %d\n", bn); 436 cn = bn/st->nspc; 437 sn = bn%st->nspc; 438 tn = sn/st->nsect; 439 sn = sn%st->nsect; 440 bcr += sectsiz; 441 if ((bbn = isbad(&hpbad[unit], cn, tn, sn)) < 0) 442 return (1); 443 bbn = st->ncyl*st->nspc - st->nsect - 1 - bbn; 444 cn = bbn/st->nspc; 445 sn = bbn%st->nspc; 446 tn = sn/st->nsect; 447 sn = sn%st->nsect; 448 io->i_cc = sectsiz; 449 io->i_ma += npf*sectsiz; 450 if (hpdebug[unit] & HPF_BSEDEBUG) 451 printf("revector to cn %d tn %d sn %d\n", cn, tn, sn); 452 rp->hpof &= ~HPOF_SSEI; 453 mbp->mba_sr = -1; 454 rp->hpdc = cn; 455 rp->hpda = (tn<<8) + sn; 456 mbastart(io,io->i_flgs); 457 io->i_errcnt = 0; 458 HPWAIT(rp); 459 return (rp->hpds&HPDS_ERR); 460 } 461 printf("hpecc: flag=%d\n", flag); 462 return (1); 463 } 464 465 /*ARGSUSED*/ 466 hpioctl(io, cmd, arg) 467 struct iob *io; 468 int cmd; 469 caddr_t arg; 470 { 471 register unit = io->i_unit; 472 struct st *st = &hpst[hp_type[unit]], *tmp; 473 struct mba_drv *drv = mbadrv(unit); 474 int flag; 475 476 switch(cmd) { 477 478 case SAIODEBUG: 479 flag = (int)arg; 480 if (flag > 0) 481 hpdebug[unit] |= flag; 482 else 483 hpdebug[unit] &= ~flag; 484 return (0); 485 486 case SAIODEVDATA: 487 if ((drv->mbd_dt&MBDT_TAP) == 0) { 488 tmp = (struct st *)arg; 489 *tmp = *st; 490 return (0); 491 } 492 return (ECMD); 493 494 case SAIOSSI: /* skip-sector-inhibit */ 495 if (drv->mbd_dt&MBDT_TAP) 496 return (ECMD); 497 if ((io->i_flgs&F_SSI) == 0) { 498 /* make sure this is done once only */ 499 io->i_flgs |= F_SSI; 500 st->nsect++; 501 st->nspc += st->ntrak; 502 } 503 return (0); 504 505 case SAIONOSSI: /* remove skip-sector-inhibit */ 506 if (io->i_flgs & F_SSI) { 507 io->i_flgs &= ~F_SSI; 508 drv->mbd_of &= ~HPOF_SSEI; 509 st->nsect--; 510 st->nspc -= st->ntrak; 511 } 512 return(0); 513 514 case SAIOSSDEV: /* drive have skip sector? */ 515 return (RM80 ? 0 : ECMD); 516 } 517 return (ECMD); 518 } 519