1 /* hp.c 4.17 83/03/01 */ 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 #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, 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 if (io->i_boff < 0 || io->i_boff > 7 || 122 st->off[io->i_boff]== -1) 123 _stop("hp bad minor"); 124 io->i_boff = st->off[io->i_boff] * st->nspc; 125 } 126 127 hpstrategy(io, func) 128 register struct iob *io; 129 { 130 register unit = io->i_unit; 131 struct mba_regs *mba = mbamba(unit); 132 daddr_t bn, startblock; 133 struct hpdevice *hpaddr = (struct hpdevice *)mbadrv(unit); 134 struct st *st = &hpst[hp_type[unit]]; 135 int cn, tn, sn, bytecnt, bytesleft; 136 char *membase; 137 int er1, er2, hprecal; 138 139 sectsiz = SECTSIZ; 140 if ((io->i_flgs & (F_HDR|F_HCHECK)) != 0) 141 sectsiz += HDRSIZ; 142 if ((hpaddr->hpds & HPDS_VV) == 0) { 143 hpaddr->hpcs1 = HP_DCLR|HP_GO; 144 hpaddr->hpcs1 = HP_PRESET|HP_GO; 145 if (!ML11) 146 hpaddr->hpof = HPOF_FMT22; 147 } 148 io->i_errcnt = 0; 149 ssect[unit] = 0; 150 bytecnt = io->i_cc; 151 membase = io->i_ma; 152 startblock = io->i_bn; 153 hprecal = 0; 154 155 restart: 156 bn = io->i_bn; 157 cn = bn/st->nspc; 158 sn = bn%st->nspc; 159 tn = sn/st->nsect; 160 sn = sn%st->nsect + ssect[unit]; 161 162 HPWAIT(hpaddr); 163 mba->mba_sr = -1; 164 if (ML11) 165 hpaddr->hpda = bn; 166 else { 167 hpaddr->hpdc = cn; 168 hpaddr->hpda = (tn << 8) + sn; 169 } 170 if (mbastart(io, func) != 0) /* start transfer */ 171 return (-1); 172 HPWAIT(hpaddr); 173 /* 174 * Successful data transfer, return. 175 */ 176 if ((hpaddr->hpds&HPDS_ERR) == 0 && (mba->mba_sr&MBSR_EBITS) == 0) 177 return (bytecnt); 178 179 /* 180 * Error handling. Calculate location of error. 181 */ 182 bytesleft = MASKREG(mba->mba_bcr); 183 if (bytesleft) 184 bytesleft |= 0xffff0000; /* sxt */ 185 bn = io->i_bn + (io->i_cc + bytesleft) / sectsiz; 186 cn = bn/st->nspc; 187 sn = bn%st->nspc; 188 tn = sn/st->nsect; 189 sn = sn%st->nsect; 190 er1 = MASKREG(hpaddr->hper1); 191 er2 = MASKREG(hpaddr->hper2); 192 if (hpdebug[unit] & (HPF_ECCDEBUG|HPF_BSEDEBUG)) { 193 printf("hp error: (cyl,trk,sec)=(%d,%d,%d) ds=%b\n", 194 cn, tn, sn, MASKREG(hpaddr->hpds), HPDS_BITS); 195 printf("er1=%b er2=%b\n", er1, HPER1_BITS, er2, HPER2_BITS); 196 printf("bytes left: %d, of 0x%x, da 0x%x\n",-bytesleft, 197 hpaddr->hpof, hpaddr->hpda); 198 } 199 if (er1 & HPER1_HCRC) { 200 er1 &= ~(HPER1_HCE|HPER1_FER); 201 er2 &= ~HPER2_BSE; 202 } 203 /* 204 * Give up early if drive write locked. 205 */ 206 if (er1&HPER1_WLE) { 207 printf("hp%d: write locked\n", unit); 208 return (-1); 209 } 210 /* 211 * Interpret format error bit as a bad block on RP06's. 212 */ 213 if (MASKREG(er1) == HPER1_FER && RP06) 214 goto badsect; 215 216 /* 217 * If a hard error, or maximum retry count 218 * exceeded, clear controller state and 219 * pass back error to caller. 220 */ 221 if (++io->i_errcnt > 27 || (er1 & HPER1_HARD) || 222 (!ML11 && (er2 & HPER2_HARD))) { 223 if ((io->i_flgs&F_NBSF) == 0 && hpecc(io, BSE) == 0) 224 goto success; 225 hard0: 226 io->i_error = EHER; 227 if (mba->mba_sr & (MBSR_WCKUP|MBSR_WCKLWR)) 228 io->i_error = EWCK; 229 hard: 230 io->i_errblk = bn + ssect[unit]; 231 printf("hp error: (cyl,trk,sec)=(%d,%d,%d) ds=%b \n", 232 cn, tn, sn, MASKREG(hpaddr->hpds), HPDS_BITS); 233 printf("er1=%b er2=%b", er1, HPER1_BITS, er2, HPER2_BITS); 234 if (hpaddr->hpmr) 235 printf(" mr1=%o", MASKREG(hpaddr->hpmr)); 236 if (hpaddr->hpmr2) 237 printf(" mr2=%o", MASKREG(hpaddr->hpmr2)); 238 if (hpdebug[unit] & (HPF_BSEDEBUG|HPF_ECCDEBUG)) 239 printf(" dc=%d, da=0x%x",MASKREG(hpaddr->hpdc), 240 MASKREG(hpaddr->hpda)); 241 hpaddr->hpcs1 = HP_DCLR|HP_GO; 242 printf("\n"); 243 return (-1); 244 245 } 246 /* 247 * Attempt to forward bad sectors on 248 * anything but an ML11. If drive 249 * supports skip sector handling, try to 250 * use it first; otherwise try the 251 * bad sector table. 252 */ 253 if ((er2 & HPER2_BSE) && !ML11) { 254 badsect: 255 if (!ssect[unit] && (er2&HPER2_SSE)) 256 goto skipsect; 257 if (io->i_flgs & F_NBSF) { 258 io->i_error = EBSE; 259 goto hard; 260 } 261 if (hpecc(io, BSE) == 0) 262 goto success; 263 io->i_error = EBSE; 264 goto hard; 265 } 266 267 /* 268 * Skip sector handling. 269 */ 270 if (RM80 && (er2 & HPER2_SSE)) { 271 skipsect: 272 (void) hpecc(io, SSE); 273 ssect[unit] = 1; 274 goto success; 275 } 276 /* 277 * ECC correction? 278 */ 279 if ((er1 & (HPER1_DCK|HPER1_ECH)) == HPER1_DCK) { 280 if (hpecc(io, ECC) == 0) 281 goto success; 282 io->i_error = EECC; 283 return (-1); 284 } 285 if (ML11 && (io->i_errcnt >= 16)) 286 goto hard0; 287 /* fall thru to retry */ 288 hpaddr->hpcs1 = HP_DCLR|HP_GO; 289 HPWAIT(hpaddr); 290 291 /* 292 * Every fourth retry recalibrate. 293 */ 294 if (((io->i_errcnt & 07) == 4) ) { 295 hpaddr->hpcs1 = HP_RECAL|HP_GO; 296 hprecal = 1; 297 goto again; 298 } 299 300 /* 301 * Recalibration state machine. 302 */ 303 switch (hprecal) { 304 305 case 1: 306 hpaddr->hpdc = cn; 307 hpaddr->hpcs1 = HP_SEEK|HP_GO; 308 hprecal = 2; 309 goto again; 310 311 case 2: 312 if (io->i_errcnt < 16 || (io->i_flgs & F_READ) == 0) 313 goto donerecal; 314 hpaddr->hpof = hp_offset[io->i_errcnt & 017]|HPOF_FMT22; 315 hpaddr->hpcs1 = HP_OFFSET|HP_GO; 316 hprecal = 3; 317 goto again; 318 319 case 3: 320 donerecal: 321 hprecal = 0; 322 goto again; 323 } 324 if (io->i_errcnt >= 16) { 325 hpaddr->hpcs1 = HP_RTC|HP_GO; 326 while (hpaddr->hpds & HPDS_PIP) 327 ; 328 } 329 goto again; 330 331 success: 332 /* 333 * On successful error recovery, bump 334 * block number to advance to next portion 335 * of i/o transfer. 336 */ 337 bn++; 338 if ((bn-startblock) * sectsiz < bytecnt) { 339 again: 340 io->i_bn = bn; 341 io->i_ma = membase + (io->i_bn - startblock)*sectsiz; 342 io->i_cc = bytecnt - (io->i_bn - startblock)*sectsiz; 343 if (hpdebug[unit] & (HPF_ECCDEBUG|HPF_BSEDEBUG)) 344 printf("restart: bn=%d, cc=%d, ma=0x%x hprecal=%d\n", 345 io->i_bn, io->i_cc, io->i_ma, hprecal); 346 goto restart; 347 } 348 return (bytecnt); 349 } 350 351 hpecc(io, flag) 352 register struct iob *io; 353 int flag; 354 { 355 register unit = io->i_unit; 356 register struct mba_regs *mbp = mbamba(unit); 357 register struct hpdevice *rp = (struct hpdevice *)mbadrv(unit); 358 register struct st *st = &hpst[hp_type[unit]]; 359 int npf, bn, cn, tn, sn, bcr; 360 361 bcr = MASKREG(mbp->mba_bcr); 362 if (bcr) 363 bcr |= 0xffff0000; /* sxt */ 364 npf = (bcr + io->i_cc) / sectsiz; /* # sectors read */ 365 bn = io->i_bn + npf + ssect[unit]; /* physical block #*/ 366 if (hpdebug[unit]&HPF_ECCDEBUG) 367 printf("bcr=%d npf=%d ssect=%d sectsiz=%d i_cc=%d\n", 368 bcr, npf, ssect[unit], sectsiz, io->i_cc); 369 /* 370 * ECC correction logic. 371 */ 372 if (flag == ECC) { 373 register int i; 374 caddr_t addr; 375 int bit, o, mask, ecccnt = 0; 376 377 printf("hp%d: soft ecc sn%d\n", unit, bn); 378 mask = MASKREG(rp->hpec2); 379 i = MASKREG(rp->hpec1) - 1; /* -1 makes 0 origin */ 380 bit = i&07; 381 o = (i & ~07) >> 3; 382 rp->hpcs1 = HP_DCLR | HP_GO; 383 while (o <sectsiz && npf*sectsiz + o < io->i_cc && bit > -11) { 384 addr = io->i_ma + (npf*sectsiz) + o; 385 /* 386 * No data transfer occurs with a write check, 387 * so don't correct the resident copy of data. 388 */ 389 if ((io->i_flgs & (F_CHECK|F_HCHECK)) == 0) { 390 if (hpdebug[unit] & HPF_ECCDEBUG) 391 printf("addr=%x old=%x ", addr, 392 (*addr & 0xff)); 393 *addr ^= (mask << bit); 394 if (hpdebug[unit] & HPF_ECCDEBUG) 395 printf("new=%x\n",(*addr & 0xff)); 396 } 397 o++, bit -= 8; 398 if ((io->i_flgs & F_ECCLM) && ecccnt++ >= MAXECC) 399 return (1); 400 } 401 return (0); 402 } 403 404 /* 405 * Skip sector error. 406 * Set skip-sector-inhibit and 407 * read next sector 408 */ 409 if (flag == SSE) { 410 rp->hpcs1 = HP_DCLR | HP_GO; 411 HPWAIT(rp); 412 rp->hpof |= HPOF_SSEI; 413 return (0); 414 } 415 416 /* 417 * Bad block forwarding. 418 */ 419 if (flag == BSE) { 420 int bbn; 421 422 rp->hpcs1 = HP_DCLR | HP_GO; 423 if (hpdebug[unit] & HPF_BSEDEBUG) 424 printf("hpecc: BSE @ bn %d\n", bn); 425 cn = bn/st->nspc; 426 sn = bn%st->nspc; 427 tn = sn/st->nsect; 428 sn = sn%st->nsect; 429 bcr += sectsiz; 430 if ((bbn = isbad(&hpbad[unit], cn, tn, sn)) < 0) 431 return (1); 432 bbn = st->ncyl*st->nspc - st->nsect - 1 - bbn; 433 cn = bbn/st->nspc; 434 sn = bbn%st->nspc; 435 tn = sn/st->nsect; 436 sn = sn%st->nsect; 437 io->i_cc = sectsiz; 438 io->i_ma += npf*sectsiz; 439 if (hpdebug[unit] & HPF_BSEDEBUG) 440 printf("revector to cn %d tn %d sn %d\n", cn, tn, sn); 441 rp->hpof &= ~HPOF_SSEI; 442 mbp->mba_sr = -1; 443 rp->hpdc = cn; 444 rp->hpda = (tn<<8) + sn; 445 mbastart(io,io->i_flgs); 446 io->i_errcnt = 0; 447 HPWAIT(rp); 448 return (rp->hpds&HPDS_ERR); 449 } 450 printf("hpecc: flag=%d\n", flag); 451 return (1); 452 } 453 454 /*ARGSUSED*/ 455 hpioctl(io, cmd, arg) 456 struct iob *io; 457 int cmd; 458 caddr_t arg; 459 { 460 register unit = io->i_unit; 461 struct st *st = &hpst[hp_type[unit]], *tmp; 462 struct mba_drv *drv = mbadrv(unit); 463 int flag; 464 465 switch(cmd) { 466 467 case SAIODEBUG: 468 flag = (int)arg; 469 if (flag > 0) 470 hpdebug[unit] |= flag; 471 else 472 hpdebug[unit] &= ~flag; 473 return (0); 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 return (ECMD); 482 483 case SAIOSSI: /* skip-sector-inhibit */ 484 if (drv->mbd_dt&MBDT_TAP) 485 return (ECMD); 486 if ((io->i_flgs&F_SSI) == 0) { 487 /* make sure this is done once only */ 488 io->i_flgs |= F_SSI; 489 st->nsect++; 490 st->nspc += st->ntrak; 491 } 492 return (0); 493 494 case SAIONOSSI: /* remove skip-sector-inhibit */ 495 if (io->i_flgs & F_SSI) { 496 io->i_flgs &= ~F_SSI; 497 drv->mbd_of &= ~HPOF_SSEI; 498 st->nsect--; 499 st->nspc -= st->ntrak; 500 } 501 return(0); 502 503 case SAIOSSDEV: /* drive have skip sector? */ 504 return (RM80 ? 0 : ECMD); 505 } 506 return (ECMD); 507 } 508