1 /* hp.c 4.7 83/02/01 */ 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 10 #include "../h/param.h" 11 #include "../h/inode.h" 12 #include "../h/fs.h" 13 #include "../h/dkbad.h" 14 15 #include "../vax/pte.h" 16 #include "../vaxmba/hpreg.h" 17 #include "../vaxmba/mbareg.h" 18 19 #include "saio.h" 20 #include "savax.h" 21 22 #define MASKREG(reg) ((reg)&0xffff) 23 24 #define MAXBADDESC 126 25 #define SECTSIZ 512 /* sector size in bytes */ 26 #define HDRSIZ 4 /* number of bytes in sector header */ 27 #define MAXECC 5 /* the maximum number of bad bits accepted in 28 * an ecc error when F_ECCLM is set */ 29 30 char hp_type[MAXNMBA*8] = { 0 }; 31 32 /* THIS SHOULD BE READ IN OFF THE PACK, PER DRIVE */ 33 short hp6_off[8] = { 0, 38, 0, -1, -1, -1, 118, -1 }; 34 short rm3_off[8] = { 0, 100, 0, -1, -1, -1, 310, -1 }; 35 short rm5_off[8] = { 0, 27, 0, 562, 589, 681, 562, 82 }; 36 short rm80_off[8] = { 0, 37, 0, -1, -1, -1, 115, 305 }; 37 short hp7_off[8] = { 0, 10, 0, 330, 340, 500, 330, 50 }; 38 short ml_off[8] = { 0, -1, -1, -1, -1, -1, -1, -1 }; 39 short si9775_off[8] = { 0, 13, 0, -1, -1, -1, 40, 441 }; 40 short si9730_off[8] = { 0, 50, 0, -1, -1, -1, -1, 155 }; 41 short hpam_off[8] = { 0, 32, 0, 668, 723, 778, 668, 98 }; 42 short hpfj_off[8] = { 0, 19, 0, -1, -1, -1, 398, 59 }; 43 /* END SHOULD BE READ IN */ 44 45 short hptypes[] = 46 { MBDT_RM03, MBDT_RM05, MBDT_RP06, MBDT_RM80, MBDT_RP05, MBDT_RP07, 47 MBDT_ML11A, MBDT_ML11B, -1/*9755*/, -1/*9730*/, -1/*Capr*/, 48 -1/* eagle */, MBDT_RM02, 0}; 49 50 #define RP06 (hptypes[hp_type[unit]] <= MBDT_RP06) 51 #define ML11 (hptypes[hp_type[unit]] == MBDT_ML11A) 52 #define RM80 (hptypes[hp_type[unit]] == MBDT_RM80) 53 54 u_char hp_offset[16] = { 55 HPOF_P400, HPOF_M400, HPOF_P400, HPOF_M400, 56 HPOF_P800, HPOF_M800, HPOF_P800, HPOF_M800, 57 HPOF_P1200, HPOF_M1200, HPOF_P1200, HPOF_M1200, 58 0, 0, 0, 0, 59 }; 60 61 struct st hpst[] = { 62 32, 5, 32*5, 823, rm3_off, /* RM03 */ 63 32, 19, 32*19, 823, rm5_off, /* RM05 */ 64 22, 19, 22*19, 815, hp6_off, /* RP06 */ 65 31, 14, 31*14, 559, rm80_off, /* RM80 */ 66 22, 19, 22*19, 411, hp6_off, /* RP06 */ 67 50, 32, 50*32, 630, hp7_off, /* RP07 */ 68 1, 1, 1, 1, ml_off, /* ML11A */ 69 1, 1, 1, 1, ml_off, /* ML11B */ 70 32, 40, 32*40, 843, si9775_off, /* 9775 */ 71 32, 10, 32*10, 823, si9730_off, /* 9730 */ 72 32, 16, 32*16, 1024, hpam_off, /* capricorn */ 73 43, 20, 43*20, 842, hpfj_off, /* Eagle */ 74 1, 1, 1, 1, 0, /* rm02 - not used */ 75 }; 76 struct dkbad hpbad[MAXNMBA*8]; 77 int sectsiz; 78 79 hpopen(io) 80 register struct iob *io; 81 { 82 register unit = io->i_unit; 83 struct hpdevice *hpaddr = (struct hpdevice *)mbadrv(unit); 84 register struct st *st; 85 86 mbainit(UNITTOMBA(unit)); 87 if (hp_type[unit] == 0) { 88 register type = hpaddr->hpdt & MBDT_TYPE; 89 register int i; 90 struct iob tio; 91 92 for (i = 0; hptypes[i]; i++) 93 if (hptypes[i] == type) 94 goto found; 95 _stop("unknown drive type"); 96 found: 97 switch (i) { 98 case 0: case 1: { /* rm03 or rm05 */ 99 register hpsn = hpaddr->hpsn; 100 101 if ((hpsn & SIMB_LU) != unit) 102 break; 103 switch ((hpsn & SIMB_MB) &~ (SIMB_S6|SIRM03|SIRM05)) { 104 case SI9775D: 105 i = 8; /* si9775 */ 106 break; 107 case SI9730D: 108 i = 9; /* si9730 */ 109 break; 110 case SI9766: 111 i = 1; /* rm05 */ 112 hpaddr->hpcs1 = HP_RECAL|HP_GO; 113 DELAY(100000); 114 break; 115 case SI9762: 116 i = 0; /* rm03 */ 117 break; 118 } 119 break; 120 } 121 122 case 12: /* rm02 */ 123 hpaddr->hpcs1 = HP_NOP; 124 hpaddr->hphr = HPHR_MAXTRAK; 125 if (MASKREG(hpaddr->hphr) == 15) 126 i = 10; /* ampex capricorn */ 127 else 128 i = 11; /* eagle */ 129 break; 130 131 case 6: case 7: /* ml11a ml11b */ 132 i = 6; /* ml11a */ 133 break; 134 } 135 hp_type[unit] = i; 136 hpaddr->hpcs1 = HP_DCLR|HP_GO; /* init drive */ 137 hpaddr->hpcs1 = HP_PRESET|HP_GO; 138 if (!ML11) 139 hpaddr->hpof = HPOF_FMT22; 140 /* 141 * Read in the bad sector table: 142 * copy the contents of the io structure 143 * to tio for use during the bb pointer 144 * read operation. 145 */ 146 st = &hpst[i]; 147 tio = *io; 148 tio.i_bn = st->nspc * st->ncyl - st->nsect; 149 tio.i_ma = (char *)&hpbad[unit]; 150 tio.i_cc = sizeof (struct dkbad); 151 tio.i_flgs |= F_RDDATA; 152 for (i = 0; i < 5; i++) { 153 if (hpstrategy(&tio, READ) == sizeof (struct dkbad)) 154 break; 155 tio.i_bn += 2; 156 } 157 if (i == 5) { 158 printf("Unable to read bad sector table\n"); 159 for (i = 0; i < MAXBADDESC; i++) { 160 hpbad[unit].bt_bad[i].bt_cyl = -1; 161 hpbad[unit].bt_bad[i].bt_trksec = -1; 162 } 163 } 164 } 165 if (io->i_boff < 0 || io->i_boff > 7 || 166 st->off[io->i_boff]== -1) 167 _stop("hp bad minor"); 168 io->i_boff = st->off[io->i_boff] * st->nspc; 169 } 170 171 int ssect; /* set to 1 if we are on a track with skip sectors */ 172 173 hpstrategy(io, func) 174 register struct iob *io; 175 { 176 register unit = io->i_unit; 177 struct mba_regs *mba = mbamba(unit); 178 daddr_t bn; 179 struct hpdevice *hpaddr = (struct hpdevice *)mbadrv(unit); 180 struct st *st = &hpst[hp_type[unit]]; 181 int cn, tn, sn, bytecnt, bytesleft; 182 daddr_t startblock; 183 char *membase; 184 int er1, er2, hprecal; 185 186 sectsiz = SECTSIZ; 187 if ((io->i_flgs & (F_HDR|F_HCHECK)) != 0) 188 sectsiz += HDRSIZ; 189 if ((hpaddr->hpds & HPDS_VV) == 0) { 190 hpaddr->hpcs1 = HP_DCLR|HP_GO; 191 hpaddr->hpcs1 = HP_PRESET|HP_GO; 192 if (!ML11) /* any but ml11 */ 193 hpaddr->hpof = HPOF_FMT22; 194 } 195 io->i_errcnt = 0; 196 ssect = 0; 197 bytecnt = io->i_cc; 198 membase = io->i_ma; 199 startblock = io->i_bn; 200 hprecal = 0; 201 restart: 202 bn = io->i_bn; 203 cn = bn/st->nspc; 204 sn = bn%st->nspc; 205 tn = sn/st->nsect; 206 sn = sn%st->nsect + ssect; 207 208 while ((hpaddr->hpds & HPDS_DRY) == 0) 209 ; 210 mba->mba_sr = -1; 211 if (ML11) 212 hpaddr->hpda = bn; 213 else { 214 hpaddr->hpdc = cn; 215 hpaddr->hpda = (tn << 8) + sn; 216 } 217 if (mbastart(io, func) != 0) /* start transfer */ 218 return (-1); 219 220 while ((hpaddr->hpds & HPDS_DRY) == 0) 221 ; 222 if (((hpaddr->hpds&HPDS_ERR) | (mba->mba_sr&MBSR_EBITS)) == 0 ) 223 return(bytecnt); 224 225 /* ------- error handling ------- */ 226 227 if (bytesleft = MASKREG(mba->mba_bcr>>16)) 228 bytesleft |= 0xffff0000; /* sign ext */ 229 bn = io->i_bn + (io->i_cc + bytesleft)/sectsiz; 230 cn = bn/st->nspc; 231 sn = bn%st->nspc; 232 tn = sn/st->nsect; 233 sn = sn%st->nsect; 234 er1 = MASKREG(hpaddr->hper1); 235 er2 = MASKREG(hpaddr->hper2); 236 #ifdef HPDEBUG 237 printf("hp error: (cyl,trk,sec)=(%d,%d,%d) ds=%b \n", 238 cn, tn, sn, MASKREG(hpaddr->hpds), HPDS_BITS); 239 printf("er1=%b er2=%b", er1, HPER1_BITS, er2, HPER2_BITS); 240 printf("\nbytes left: %d, of 0x%x, da 0x%x",-bytesleft, 241 hpaddr->hpof, hpaddr->hpda); 242 printf("\n"); 243 #endif 244 if (er1 & HPER1_HCRC) { 245 er1 &= ~(HPER1_HCE|HPER1_FER); 246 er2 &= ~HPER2_BSE; 247 } 248 if (er1&HPER1_WLE) { 249 printf("hp%d: write locked\n", unit); 250 return(-1); 251 } else if (MASKREG(er1) == HPER1_FER && RP06) { 252 goto badsect; 253 254 } else if (++io->i_errcnt > 27 || 255 er1 & HPER1_HARD || 256 (!ML11 && (er2 & HPER2_HARD))) { 257 hard0: 258 io->i_error = EHER; 259 if ((mba->mba_sr & (MBSR_WCKUP | MBSR_WCKLWR)) != 0) 260 io->i_error = EWCK; 261 hard: 262 io->i_errblk = bn + ssect; 263 printf("hp error: (cyl,trk,sec)=(%d,%d,%d) ds=%b \n", 264 cn, tn, sn, MASKREG(hpaddr->hpds), HPDS_BITS); 265 printf("er1=%b er2=%b", 266 er1, HPER1_BITS, 267 er2, HPER2_BITS); 268 if (hpaddr->hpmr) 269 printf(" mr1=%o", MASKREG(hpaddr->hpmr)); 270 if (hpaddr->hpmr2) 271 printf(" mr2=%o", MASKREG(hpaddr->hpmr2)); 272 #ifdef HPDEBUG 273 printf("dc: %d, da: 0x%x",MASKREG(hpaddr->hpdc), 274 MASKREG(hpaddr->hpda)); 275 #endif 276 hpaddr->hpcs1 = HP_DCLR|HP_GO; 277 printf("\n"); 278 return(-1); 279 280 } else if ((er2 & HPER2_BSE) && !ML11) { 281 badsect: 282 if (!ssect && (er2&HPER2_SSE)) 283 goto skipsect; 284 if ((io->i_flgs & F_NBSF) != 0) { 285 io->i_error = EBSE; 286 goto hard; 287 } 288 if (hpecc(io, BSE) == 0) 289 goto success; 290 else { 291 io->i_error = EBSE; 292 goto hard; 293 } 294 } else if (RM80 && er2&HPER2_SSE) { 295 skipsect: 296 /* skip sector error */ 297 (void) hpecc(io, SSE); 298 ssect=1; 299 goto success; 300 } else if ((er1&(HPER1_DCK|HPER1_ECH))==HPER1_DCK) { 301 if ( hpecc(io, ECC) == 0) 302 goto success; 303 else { 304 io->i_error = EECC; 305 return(1); 306 } 307 } 308 309 if (ML11 && (io->i_errcnt >= 16)) 310 goto hard0; 311 312 /* fall thru to retry */ 313 314 hpaddr->hpcs1 = HP_DCLR|HP_GO; 315 while ((hpaddr->hpds & HPDS_DRY) == 0) 316 ; 317 if (((io->i_errcnt&07) == 4) ) { 318 hpaddr->hpcs1 = HP_RECAL|HP_GO; 319 hprecal = 1; 320 goto try_again; 321 } 322 switch (hprecal) { 323 324 case 1: 325 hpaddr->hpdc = cn; 326 hpaddr->hpcs1 = HP_SEEK|HP_GO; 327 hprecal++; 328 goto try_again; 329 case 2: 330 if (io->i_errcnt < 16 || (io->i_flgs & F_READ) == 0) 331 goto donerecal; 332 hpaddr->hpof = hp_offset[io->i_errcnt & 017]|HPOF_FMT22; 333 hpaddr->hpcs1 = HP_OFFSET|HP_GO; 334 hprecal++; 335 goto try_again; 336 donerecal: 337 case 3: 338 hprecal = 0; 339 goto try_again; 340 } 341 if (io->i_errcnt >= 16) { 342 hpaddr->hpcs1 = HP_RTC|HP_GO; 343 while (hpaddr->hpds & HPDS_PIP) 344 ; 345 } 346 goto try_again; 347 success: /* continue with the next block */ 348 bn++; 349 if ((bn-startblock) * sectsiz < bytecnt) { 350 351 try_again: /* re-read same block */ 352 io->i_bn = bn; 353 io->i_ma = membase + (io->i_bn - startblock)*sectsiz; 354 io->i_cc = bytecnt - (io->i_bn - startblock)*sectsiz; 355 #ifdef HPDEBUG 356 printf("restart: bl %d, byte %d, mem 0x%x hprecal %d\n", 357 io->i_bn, io->i_cc, io->i_ma, hprecal); 358 #endif 359 goto restart; 360 } 361 return (bytecnt); 362 } 363 hpecc(io, flag) 364 register struct iob *io; 365 int flag; 366 { 367 register unit = io->i_unit; 368 register struct mba_regs *mbp = mbamba(unit); 369 register struct hpdevice *rp = (struct hpdevice *)mbadrv(unit); 370 register struct st *st = &hpst[hp_type[unit]]; 371 int npf; 372 int bn, cn, tn, sn; 373 int bcr; 374 375 if (bcr = MASKREG(mbp->mba_bcr>>16)) 376 bcr |= 0xffff0000; /* sxt */ 377 npf = (bcr + io->i_cc)/sectsiz; /* number of sectors read */ 378 bn = io->i_bn + npf + ssect; /* bn is physical block number*/ 379 switch (flag) { 380 case ECC: 381 { 382 register int i; 383 caddr_t addr; 384 int bit, byte, mask, ecccnt = 0; 385 386 printf("hp%d: soft ecc sn%d\n", unit, bn); 387 mask = MASKREG(rp->hpec2); 388 i = MASKREG(rp->hpec1) - 1; /* -1 makes 0 origin */ 389 bit = i&07; 390 i = (i&~07)>>3; 391 byte = i; 392 rp->hpcs1 = HP_DCLR | HP_GO; 393 while (i <sectsiz && npf*sectsiz + i < io->i_cc && bit > -11) { 394 addr = io->i_ma + (npf*sectsiz) + byte; 395 #ifdef HPECCDEBUG 396 printf("addr %x old:%x ",addr, (*addr&0xff)); 397 #endif 398 if ((io->i_flgs & (F_CHECK|F_HCHECK)) == 0) 399 *addr ^= (mask << bit); /* don't 'correct' mem- 400 * ory during Wcheck */ 401 #ifdef HPECCDEBUG 402 printf("new:%x\n",(*addr&0xff)); 403 #endif 404 byte++; 405 i++; 406 bit -= 8; 407 if ((ecccnt++>=MAXECC) && ((io->i_flgs&F_ECCLM) != 0)) 408 return(1); 409 } 410 return(0); 411 } 412 413 case SSE: /* skip sector error */ 414 /* set skip-sector-inhibit and read next sector */ 415 rp->hpcs1 = HP_DCLR | HP_GO; 416 while(rp->hpds & HPDS_DRY == 0) 417 ; /* avoid RMR error */ 418 rp->hpof |= HPOF_SSEI; 419 return(0); 420 421 #ifndef NOBADSECT 422 case BSE: 423 { 424 int bbn; 425 rp->hpcs1 = HP_DCLR | HP_GO; 426 #ifdef HPDEBUG 427 printf("hpecc: BSE @ bn %d\n", bn); 428 #endif 429 cn = bn/st->nspc; 430 sn = bn%st->nspc; 431 tn = sn/st->nsect; 432 sn = sn%st->nsect; 433 bcr += sectsiz; 434 if ((bbn = isbad(&hpbad[unit], cn, tn, sn)) < 0) 435 return(1); 436 bbn = st->ncyl*st->nspc - st->nsect - 1 - bbn; 437 cn = bbn/st->nspc; 438 sn = bbn%st->nspc; 439 tn = sn/st->nsect; 440 sn = sn%st->nsect; 441 io->i_cc = sectsiz; 442 io->i_ma += npf*sectsiz; 443 #ifdef HPDEBUG 444 printf("revector to cn %d tn %d sn %d mem: 0x%x\n", 445 cn, tn, sn, io->i_ma); 446 #endif 447 rp->hpof &= ~HPOF_SSEI; /* clear skip sector inhibit if set */ 448 mbp->mba_sr = -1; 449 rp->hpdc = cn; 450 rp->hpda = (tn<<8) + sn; 451 mbastart(io,io->i_flgs); 452 io->i_errcnt = 0; /* error has been corrected */ 453 while(rp->hpds & HPDS_DRY == 0) 454 ; /* wait for the read to complete */ 455 if (rp->hpds&HPDS_ERR) 456 return(1); 457 else 458 return(0); 459 } 460 } 461 } 462 /*ARGSUSED*/ 463 hpioctl(io, cmd, arg) 464 struct iob *io; 465 int cmd; 466 caddr_t arg; 467 { 468 469 register unit = io->i_unit; 470 struct st *st = &hpst[hp_type[unit]], *tmp; 471 struct mba_drv *drv = mbadrv(unit); 472 473 switch(cmd) { 474 475 case SAIODEVDATA: 476 if ((drv->mbd_dt&MBDT_TAP) == 0) { 477 tmp = (struct st *)arg; 478 *tmp = *st; 479 return(0); 480 } 481 else 482 return(ECMD); 483 484 case SAIOSSI: /* set the skip-sector-inhibit flag */ 485 if ((drv->mbd_dt&MBDT_TAP) == 0) { 486 if ((io->i_flgs&F_SSI)==0) { /* make sure this is */ 487 io->i_flgs |= F_SSI; /* done only once */ 488 st->nsect++; 489 st->nspc += st->ntrak; 490 } 491 return(0); 492 } else 493 return(ECMD); 494 495 case SAIONOSSI: /* remove the skip-sector-inh. flag */ 496 if (io->i_flgs & F_SSI) { 497 io->i_flgs &= ~F_SSI; 498 drv->mbd_of &= ~HPOF_SSEI; 499 st->nsect--; 500 st->nspc -= st->ntrak; 501 } 502 return(0); 503 504 case SAIOSSDEV: /* return null if device has skip sector 505 * handling, otherwise return ECMD 506 */ 507 if (RM80) 508 return(0); 509 else 510 return(ECMD); 511 512 default: 513 return (ECMD); 514 } 515 } 516 517