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1.1 ! root 1: /* up.c 6.2 83/09/23 */ ! 2: ! 3: /* ! 4: * UNIBUS peripheral standalone driver ! 5: * with ECC correction and bad block forwarding. ! 6: * Also supports header operation and write ! 7: * check for data and/or header. ! 8: */ ! 9: #include "../h/param.h" ! 10: #include "../h/inode.h" ! 11: #include "../h/fs.h" ! 12: #include "../h/dkbad.h" ! 13: #include "../h/vmmac.h" ! 14: ! 15: #include "../vax/pte.h" ! 16: #include "../vaxuba/upreg.h" ! 17: #include "../vaxuba/ubareg.h" ! 18: ! 19: #include "saio.h" ! 20: #include "savax.h" ! 21: ! 22: #define MAXBADDESC 126 /* max number of bad sectors recorded */ ! 23: #define SECTSIZ 512 /* sector size in bytes */ ! 24: #define HDRSIZ 4 /* number of bytes in sector header */ ! 25: ! 26: #define MAXECC 5 /* max # bad bits allowed on ecc w/ F_ECCLM */ ! 27: ! 28: u_short ubastd[] = { 0776700 }; ! 29: ! 30: char up_gottype[MAXNUBA*8]; ! 31: char up_type[MAXNUBA*8]; ! 32: extern struct st upst[]; ! 33: ! 34: struct dkbad upbad[MAXNUBA*8]; /* bad sector table */ ! 35: int sectsiz; /* real sector size */ ! 36: int updebug[MAXNUBA*8]; ! 37: #define UPF_BSEDEBUG 01 /* debugging bad sector forwarding */ ! 38: #define UPF_ECCDEBUG 02 /* debugging ecc correction */ ! 39: ! 40: u_char up_offset[16] = { ! 41: UPOF_P400, UPOF_M400, UPOF_P400, UPOF_M400, ! 42: UPOF_P800, UPOF_M800, UPOF_P800, UPOF_M800, ! 43: UPOF_P1200, UPOF_M1200, UPOF_P1200, UPOF_M1200, ! 44: 0, 0, 0, 0 ! 45: }; ! 46: ! 47: upopen(io) ! 48: register struct iob *io; ! 49: { ! 50: register unit = io->i_unit; ! 51: register struct updevice *upaddr; ! 52: register struct st *st; ! 53: ! 54: if (io->i_boff < 0 || io->i_boff > 7) ! 55: _stop("up bad unit"); ! 56: upaddr = (struct updevice *)ubamem(unit, ubastd[0]); ! 57: upaddr->upcs2 = unit % 8; ! 58: while ((upaddr->upcs1 & UP_DVA) == 0) ! 59: ; ! 60: if (up_gottype[unit] == 0) { ! 61: register int i; ! 62: struct iob tio; ! 63: ! 64: up_type[unit] = upmaptype(unit, upaddr); ! 65: if (up_type[unit] < 0) ! 66: _stop("unknown drive type"); ! 67: st = &upst[up_type[unit]]; ! 68: if (st->off[io->i_boff] == -1) ! 69: _stop("up bad unit"); ! 70: /* ! 71: * Read in the bad sector table. ! 72: */ ! 73: tio = *io; ! 74: tio.i_bn = st->nspc * st->ncyl - st->nsect; ! 75: tio.i_ma = (char *)&upbad[tio.i_unit]; ! 76: tio.i_cc = sizeof (struct dkbad); ! 77: tio.i_flgs |= F_RDDATA; ! 78: for (i = 0; i < 5; i++) { ! 79: if (upstrategy(&tio, READ) == sizeof (struct dkbad)) ! 80: break; ! 81: tio.i_bn += 2; ! 82: } ! 83: if (i == 5) { ! 84: printf("Unable to read bad sector table\n"); ! 85: for (i = 0; i < MAXBADDESC; i++) { ! 86: upbad[unit].bt_bad[i].bt_cyl = -1; ! 87: upbad[unit].bt_bad[i].bt_trksec = -1; ! 88: } ! 89: } ! 90: up_gottype[unit] = 1; ! 91: } ! 92: io->i_boff = st->off[io->i_boff] * st->nspc; ! 93: io->i_flgs &= ~F_TYPEMASK; ! 94: } ! 95: ! 96: upstrategy(io, func) ! 97: register struct iob *io; ! 98: { ! 99: int cn, tn, sn, o; ! 100: register unit = io->i_unit; ! 101: daddr_t bn; ! 102: int recal, info, waitdry; ! 103: register struct updevice *upaddr = ! 104: (struct updevice *)ubamem(unit, ubastd[0]); ! 105: register struct st *st = &upst[up_type[unit]]; ! 106: int doprintf = 0; ! 107: ! 108: sectsiz = SECTSIZ; ! 109: if (io->i_flgs & (F_HDR|F_HCHECK)) ! 110: sectsiz += HDRSIZ; ! 111: upaddr->upcs2 = unit % 8; ! 112: if ((upaddr->upds & UPDS_VV) == 0) { ! 113: upaddr->upcs1 = UP_DCLR|UP_GO; ! 114: upaddr->upcs1 = UP_PRESET|UP_GO; ! 115: upaddr->upof = UPOF_FMT22; ! 116: } ! 117: if ((upaddr->upds & UPDS_DREADY) == 0) ! 118: _stop("up not ready"); ! 119: info = ubasetup(io, 1); ! 120: upaddr->upwc = -io->i_cc / sizeof (short); ! 121: recal = 0; ! 122: io->i_errcnt = 0; ! 123: ! 124: restart: ! 125: o = io->i_cc + (upaddr->upwc * sizeof (short)); ! 126: upaddr->upba = info + o; ! 127: bn = io->i_bn + o / sectsiz; ! 128: if (doprintf && updebug[unit] & (UPF_ECCDEBUG|UPF_BSEDEBUG)) ! 129: printf("wc=%d o=%d i_bn=%d bn=%d\n", ! 130: upaddr->upwc, o, io->i_bn, bn); ! 131: while((upaddr->upds & UPDS_DRY) == 0) ! 132: ; ! 133: if (upstart(io, bn) != 0) { ! 134: ubafree(io, info); ! 135: return (-1); ! 136: } ! 137: do { ! 138: DELAY(25); ! 139: } while ((upaddr->upcs1 & UP_RDY) == 0); ! 140: /* ! 141: * If transfer has completed, free UNIBUS ! 142: * resources and return transfer size. ! 143: */ ! 144: if ((upaddr->upds&UPDS_ERR) == 0 && (upaddr->upcs1&UP_TRE) == 0) ! 145: goto done; ! 146: if (updebug[unit] & (UPF_ECCDEBUG|UPF_BSEDEBUG)) { ! 147: printf("up error: (cyl,trk,sec)=(%d,%d,%d) ", ! 148: upaddr->updc, upaddr->upda>>8, upaddr->upda&0xff); ! 149: printf("cs2=%b er1=%b er2=%b wc=%d\n", ! 150: upaddr->upcs2, UPCS2_BITS, upaddr->uper1, ! 151: UPER1_BITS, upaddr->uper2, UPER2_BITS, upaddr->upwc); ! 152: } ! 153: waitdry = 0; ! 154: while ((upaddr->upds&UPDS_DRY) == 0 && ++waitdry < sectsiz) ! 155: DELAY(5); ! 156: if (upaddr->uper1&UPER1_WLE) { ! 157: /* ! 158: * Give up on write locked devices immediately. ! 159: */ ! 160: printf("up%d: write locked\n", unit); ! 161: return (-1); ! 162: } ! 163: if (++io->i_errcnt > 27) { ! 164: /* ! 165: * After 28 retries (16 without offset, and ! 166: * 12 with offset positioning) give up. ! 167: * But first, if the error is a header CRC, ! 168: * check if a replacement sector exists in ! 169: * the bad sector table. ! 170: */ ! 171: if ((upaddr->uper1&UPER1_HCRC) && (io->i_flgs&F_NBSF) == 0 && ! 172: upecc(io, BSE) == 0) ! 173: goto success; ! 174: io->i_error = EHER; ! 175: if (upaddr->upcs2 & UPCS2_WCE) ! 176: io->i_error = EWCK; ! 177: hard: ! 178: bn = io->i_bn + ! 179: (io->i_cc + upaddr->upwc * sizeof (short)) / sectsiz; ! 180: cn = bn/st->nspc; ! 181: sn = bn%st->nspc; ! 182: tn = sn/st->nsect; ! 183: sn = sn%st->nsect; ! 184: printf( ! 185: "up error: (cyl,trk,sec)=(%d,%d,%d) cs2=%b er1=%b er2=%b\n", ! 186: cn, tn, sn, ! 187: upaddr->upcs2, UPCS2_BITS, upaddr->uper1, ! 188: UPER1_BITS, upaddr->uper2, UPER2_BITS); ! 189: upaddr->upcs1 = UP_TRE|UP_DCLR|UP_GO; ! 190: io->i_errblk = bn; ! 191: if (io->i_errcnt >= 16) { ! 192: upaddr->upof = UPOF_FMT22; ! 193: upaddr->upcs1 = UP_RTC|UP_GO; ! 194: while ((upaddr->upds&UPDS_DRY) == 0) ! 195: DELAY(25); ! 196: } ! 197: return (io->i_cc + upaddr->upwc * sizeof(short)); ! 198: } ! 199: if (upaddr->uper2 & UPER2_BSE) { ! 200: if ((io->i_flgs&F_NBSF) == 0 && upecc(io, BSE) == 0) ! 201: goto success; ! 202: io->i_error = EBSE; ! 203: goto hard; ! 204: } ! 205: /* ! 206: * ECC error. If a soft error, correct it; ! 207: * otherwise fall through and retry the transfer. ! 208: */ ! 209: if ((upaddr->uper1 & (UPER1_DCK|UPER1_ECH|UPER1_HCRC)) == UPER1_DCK) { ! 210: if (upecc(io, ECC) == 0) ! 211: #ifdef F_SEVRE ! 212: if (io->i_flgs & F_SEVRE) ! 213: return (-1); ! 214: else ! 215: #endif ! 216: goto success; ! 217: io->i_error = EECC; ! 218: goto hard; ! 219: } ! 220: #ifdef F_SEVRE ! 221: if (io->i_flgs & F_SEVRE) ! 222: goto hard; ! 223: #endif ! 224: /* ! 225: * Clear drive error and, every eight attempts, ! 226: * (starting with the fourth) ! 227: * recalibrate to clear the slate. ! 228: */ ! 229: upaddr->upcs1 = UP_TRE|UP_DCLR|UP_GO; ! 230: if ((io->i_errcnt&07) == 4 ) { ! 231: upaddr->upcs1 = UP_RECAL|UP_GO; ! 232: while ((upaddr->upds&UPDS_DRY) == 0) ! 233: DELAY(25); ! 234: upaddr->updc = cn; ! 235: upaddr->upcs1 = UP_SEEK|UP_GO; ! 236: while ((upaddr->upds&UPDS_DRY) == 0) ! 237: DELAY(25); ! 238: } ! 239: if (io->i_errcnt >= 16 && (func & READ)) { ! 240: upaddr->upof = up_offset[io->i_errcnt & 017] | UPOF_FMT22; ! 241: upaddr->upcs1 = UP_OFFSET|UP_GO; ! 242: while ((upaddr->upds&UPDS_DRY) == 0) ! 243: DELAY(25); ! 244: } ! 245: goto restart; ! 246: ! 247: success: ! 248: #define rounddown(x, y) (((x) / (y)) * (y)) ! 249: upaddr->upwc = rounddown(upaddr->upwc, sectsiz / sizeof (short)); ! 250: if (upaddr->upwc) { ! 251: doprintf++; ! 252: goto restart; ! 253: } ! 254: done: ! 255: /* ! 256: * Release UNIBUS ! 257: */ ! 258: ubafree(io, info); ! 259: /* ! 260: * If we were offset positioning, ! 261: * return to centerline. ! 262: */ ! 263: if (io->i_errcnt >= 16) { ! 264: upaddr->upof = UPOF_FMT22; ! 265: upaddr->upcs1 = UP_RTC|UP_GO; ! 266: while ((upaddr->upds&UPDS_DRY) == 0) ! 267: DELAY(25); ! 268: } ! 269: return (io->i_cc); ! 270: } ! 271: ! 272: /* ! 273: * Correct an ECC error, and restart the ! 274: * i/o to complete the transfer (if necessary). ! 275: * This is quite complicated because the transfer ! 276: * may be going to an odd memory address base and/or ! 277: * across a page boundary. ! 278: */ ! 279: upecc(io, flag) ! 280: register struct iob *io; ! 281: int flag; ! 282: { ! 283: register i, unit = io->i_unit; ! 284: register struct updevice *up = ! 285: (struct updevice *)ubamem(unit, ubastd[0]); ! 286: register struct st *st; ! 287: caddr_t addr; ! 288: int bn, twc, npf, mask, cn, tn, sn; ! 289: daddr_t bbn; ! 290: ! 291: /* ! 292: * Npf is the number of sectors transferred ! 293: * before the sector containing the ECC error; ! 294: * bn is the current block number. ! 295: */ ! 296: twc = up->upwc; ! 297: npf = ((twc * sizeof(short)) + io->i_cc) / sectsiz; ! 298: if (flag == ECC) ! 299: npf--; ! 300: if (updebug[unit] & UPF_ECCDEBUG) ! 301: printf("npf=%d mask=0x%x ec1=%d wc=%d\n", ! 302: npf, up->upec2, up->upec1, twc); ! 303: bn = io->i_bn + npf; ! 304: st = &upst[up_type[unit]]; ! 305: cn = bn/st->nspc; ! 306: sn = bn%st->nspc; ! 307: tn = sn/st->nsect; ! 308: sn = sn%st->nsect; ! 309: ! 310: /* ! 311: * ECC correction. ! 312: */ ! 313: if (flag == ECC) { ! 314: int bit, o, ecccnt; ! 315: ! 316: ecccnt = 0; ! 317: mask = up->upec2; ! 318: printf("up%d: soft ecc sn%d\n", unit, bn); ! 319: /* ! 320: * Compute the byte and bit position of ! 321: * the error. o is the byte offset in ! 322: * the transfer at which the correction ! 323: * applied. ! 324: */ ! 325: i = up->upec1 - 1; /* -1 makes 0 origin */ ! 326: bit = i & 07; ! 327: o = (i & ~07) >> 3; ! 328: up->upcs1 = UP_TRE|UP_DCLR|UP_GO; ! 329: /* ! 330: * Correct while possible bits remain of mask. ! 331: * Since mask contains 11 bits, we continue while ! 332: * the bit offset is > -11. Also watch out for ! 333: * end of this block and the end of the transfer. ! 334: */ ! 335: while (o < sectsiz && (npf*sectsiz)+o < io->i_cc && bit > -11) { ! 336: /* ! 337: * addr = ! 338: * (base address of transfer) + ! 339: * (# sectors transferred before the error) * ! 340: * (sector size) + ! 341: * (byte offset to incorrect data) ! 342: */ ! 343: addr = io->i_ma + (npf * sectsiz) + o; ! 344: /* ! 345: * No data transfer occurs with a write check, ! 346: * so don't correct the resident copy of data. ! 347: */ ! 348: if ((io->i_flgs & (F_CHECK|F_HCHECK)) == 0) { ! 349: if (updebug[unit] & UPF_ECCDEBUG) ! 350: printf("addr=0x%x old=0x%x ", addr, ! 351: (*addr&0xff)); ! 352: *addr ^= (mask << bit); ! 353: if (updebug[unit] & UPF_ECCDEBUG) ! 354: printf("new=0x%x\n", (*addr&0xff)); ! 355: } ! 356: o++, bit -= 8; ! 357: if ((io->i_flgs&F_ECCLM) && ++ecccnt > MAXECC) ! 358: return (1); ! 359: } ! 360: #ifdef F_SEVRE ! 361: if (io->i_flgs & F_SEVRE) { ! 362: io->i_error = EECC; ! 363: io->i_bn = bn; ! 364: return(1); ! 365: } ! 366: #endif ! 367: return (0); ! 368: } ! 369: ! 370: /* ! 371: * Bad sector forwarding. ! 372: */ ! 373: if (flag == BSE) { ! 374: /* ! 375: * If not in bad sector table, ! 376: * indicate a hard error to caller. ! 377: */ ! 378: up->upcs1 = UP_TRE|UP_DCLR|UP_GO; ! 379: if ((bbn = isbad(&upbad[unit], cn, tn, sn)) < 0) ! 380: return (1); ! 381: bbn = (st->ncyl * st->nspc) - st->nsect - 1 - bbn; ! 382: twc = up->upwc + sectsiz; ! 383: up->upwc = - (sectsiz / sizeof (short)); ! 384: if (updebug[unit] & UPF_BSEDEBUG) ! 385: printf("revector sn %d to %d\n", sn, bbn); ! 386: /* ! 387: * Clear the drive & read the replacement ! 388: * sector. If this is in the middle of a ! 389: * transfer, then set up the controller ! 390: * registers in a normal fashion. ! 391: * The UNIBUS address need not be changed. ! 392: */ ! 393: while ((up->upcs1 & UP_RDY) == 0) ! 394: ; ! 395: if (upstart(io, bbn)) ! 396: return (1); /* error */ ! 397: io->i_errcnt = 0; /* success */ ! 398: do { ! 399: DELAY(25); ! 400: } while ((up->upcs1 & UP_RDY) == 0) ; ! 401: if ((up->upds & UPDS_ERR) || (up->upcs1 & UP_TRE)) { ! 402: up->upwc = twc - sectsiz; ! 403: return (1); ! 404: } ! 405: } ! 406: if (twc) ! 407: up->upwc = twc; ! 408: return (0); ! 409: } ! 410: ! 411: upstart(io, bn) ! 412: register struct iob *io; ! 413: daddr_t bn; ! 414: { ! 415: register struct updevice *upaddr = ! 416: (struct updevice *)ubamem(io->i_unit, ubastd[0]); ! 417: register struct st *st = &upst[up_type[io->i_unit]]; ! 418: int sn, tn; ! 419: ! 420: sn = bn%st->nspc; ! 421: tn = sn/st->nsect; ! 422: sn %= st->nsect; ! 423: upaddr->updc = bn/st->nspc; ! 424: upaddr->upda = (tn << 8) + sn; ! 425: switch (io->i_flgs & F_TYPEMASK) { ! 426: ! 427: case F_RDDATA: ! 428: upaddr->upcs1 = UP_RCOM|UP_GO; ! 429: break; ! 430: ! 431: case F_WRDATA: ! 432: upaddr->upcs1 = UP_WCOM|UP_GO; ! 433: break; ! 434: ! 435: case F_HDR|F_RDDATA: ! 436: upaddr->upcs1 = UP_RHDR|UP_GO; ! 437: break; ! 438: ! 439: case F_HDR|F_WRDATA: ! 440: upaddr->upcs1 = UP_WHDR|UP_GO; ! 441: break; ! 442: ! 443: case F_CHECK|F_WRDATA: ! 444: case F_CHECK|F_RDDATA: ! 445: upaddr->upcs1 = UP_WCDATA|UP_GO; ! 446: break; ! 447: ! 448: case F_HCHECK|F_WRDATA: ! 449: case F_HCHECK|F_RDDATA: ! 450: upaddr->upcs1 = UP_WCHDR|UP_GO; ! 451: break; ! 452: ! 453: default: ! 454: io->i_error = ECMD; ! 455: io->i_flgs &= ~F_TYPEMASK; ! 456: return (1); ! 457: } ! 458: return (0); ! 459: } ! 460: ! 461: /*ARGSUSED*/ ! 462: upioctl(io, cmd, arg) ! 463: struct iob *io; ! 464: int cmd; ! 465: caddr_t arg; ! 466: { ! 467: int unit = io->i_unit, flag; ! 468: struct st *st = &upst[up_type[unit]], *tmp; ! 469: ! 470: switch(cmd) { ! 471: ! 472: case SAIODEBUG: ! 473: flag = (int)arg; ! 474: if (flag > 0) ! 475: updebug[unit] |= flag; ! 476: else ! 477: updebug[unit] &= ~flag; ! 478: return (0); ! 479: ! 480: case SAIODEVDATA: ! 481: tmp = (struct st *)arg; ! 482: *tmp = *st; ! 483: return (0); ! 484: } ! 485: return (ECMD); ! 486: }
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