1 /* uda.c 4.20 83/02/23 */ 2 3 #include "ra.h" 4 #if NUDA > 0 5 /* 6 * UDA50/RAxx disk device driver 7 * 8 * Restrictions: 9 * Unit numbers must be less than 8. 10 * 11 * TO DO: 12 * write dump code 13 * test on 750 14 */ 15 #include "../machine/pte.h" 16 17 #include "../h/param.h" 18 #include "../h/systm.h" 19 #include "../h/buf.h" 20 #include "../h/conf.h" 21 #include "../h/dir.h" 22 #include "../h/user.h" 23 #include "../h/map.h" 24 #include "../h/vm.h" 25 #include "../h/dk.h" 26 #include "../h/cmap.h" 27 #include "../h/uio.h" 28 29 #include "../vax/cpu.h" 30 #include "../vaxuba/ubareg.h" 31 #include "../vaxuba/ubavar.h" 32 33 #define NRSPL2 3 /* log2 number of response packets */ 34 #define NCMDL2 3 /* log2 number of command packets */ 35 #define NRSP (1<<NRSPL2) 36 #define NCMD (1<<NCMDL2) 37 38 #include "../vaxuba/udareg.h" 39 40 int udadebug; 41 #define printd if(udadebug&1)printf 42 43 int udaerror = 0; /* set to cause hex dump of error log packets */ 44 45 #include "../vax/mscp.h" 46 47 struct uda_softc { 48 short sc_state; /* state of controller */ 49 short sc_mapped; /* Unibus map allocated for uda struct? */ 50 int sc_ubainfo; /* Unibus mapping info */ 51 struct uda *sc_uda; /* Unibus address of uda struct */ 52 int sc_ivec; /* interrupt vector address */ 53 short sc_credits; /* transfer credits */ 54 short sc_lastcmd; /* pointer into command ring */ 55 short sc_lastrsp; /* pointer into response ring */ 56 } uda_softc[NUDA]; 57 58 /* 59 * Controller states 60 */ 61 #define S_IDLE 0 /* hasn't been initialized */ 62 #define S_STEP1 1 /* doing step 1 init */ 63 #define S_STEP2 2 /* doing step 2 init */ 64 #define S_STEP3 3 /* doing step 3 init */ 65 #define S_SCHAR 4 /* doing "set controller characteristics" */ 66 #define S_RUN 5 /* running */ 67 68 struct uda { 69 struct udaca uda_ca; /* communications area */ 70 struct mscp uda_rsp[NRSP]; /* response packets */ 71 struct mscp uda_cmd[NCMD]; /* command packets */ 72 } uda[NUDA]; 73 74 /* THIS SHOULD BE READ OFF THE PACK, PER DRIVE */ 75 struct size { 76 daddr_t nblocks; 77 daddr_t blkoff; 78 } ra_sizes[8] ={ 79 15884, 0, /* A=blk 0 thru 15883 */ 80 33440, 15884, /* B=blk 15884 thru 49323 */ 81 -1, 0, /* C=blk 0 thru end */ 82 15884, 340670, /* D=blk 340670 thru 356553 */ 83 55936, 356554, /* E=blk 356554 thru 412489 */ 84 -1, 412490, /* F=blk 412490 thru end */ 85 82080, 49324, /* G=blk 49324 thru 131403 */ 86 -1, 131404, /* H=blk 131404 thru end */ 87 }; 88 /* END OF STUFF WHICH SHOULD BE READ IN PER DISK */ 89 90 daddr_t radsize[NRA]; /* disk size, from ONLINE end packet */ 91 92 int udprobe(), udslave(), udattach(), udintr(); 93 struct mscp *udgetcp(); 94 struct uba_ctlr *udminfo[NUDA]; 95 struct uba_device *uddinfo[NRA]; 96 struct uba_device *udip[NUDA][8]; /* 8 == max number of drives */ 97 98 u_short udstd[] = { 0772150, 0772550, 0777550, 0 }; 99 struct uba_driver udadriver = 100 { udprobe, udslave, udattach, 0, udstd, "ra", uddinfo, "uda", udminfo, 0 }; 101 struct buf rudbuf[NRA]; 102 struct buf udutab[NRA]; 103 struct buf udwtab[NUDA]; /* I/O wait queue, per controller */ 104 105 #define b_qsize b_resid /* queue size per drive, in udutab */ 106 #define b_ubinfo b_resid /* Unibus mapping info, per buffer */ 107 108 udprobe(reg, ctlr) 109 caddr_t reg; 110 int ctlr; 111 { 112 register int br, cvec; 113 register struct uda_softc *sc = &uda_softc[ctlr]; 114 115 #ifdef lint 116 br = 0; cvec = br; br = cvec; reg = reg; 117 udintr(0); 118 #endif 119 /* SHOULD CHECK THAT IT REALLY IS A UDA */ 120 br = 0x15; 121 cvec = sc->sc_ivec = (uba_hd[numuba].uh_lastiv -= 4); 122 return(sizeof (struct udadevice)); 123 } 124 125 udslave(ui, reg) 126 struct uba_device *ui; 127 caddr_t reg; 128 { 129 /* 130 * TOO HARD TO FIND OUT IF DISK IS THERE UNTIL 131 * INITIALIZED. WE'LL FIND OUT WHEN WE FIRST 132 * TRY TO ACCESS IT. 133 */ 134 #ifdef lint 135 ui = ui; reg = reg; 136 #endif 137 return(1); 138 } 139 140 udattach(ui) 141 register struct uba_device *ui; 142 { 143 144 if (ui->ui_dk > 0) 145 dk_mspw[ui->ui_dk] = 1.0 / (60 * 31 * 256); /* approx */ 146 ui->ui_flags = 0; 147 udip[ui->ui_ctlr][ui->ui_slave] = ui; 148 radsize[ui->ui_unit] = (daddr_t)0xffffff; /* max possible size */ 149 } 150 151 /* 152 * Open a UDA. Initialize the device and 153 * set the unit online. 154 */ 155 udopen(dev, flag) 156 dev_t dev; 157 int flag; 158 { 159 register int unit; 160 register struct uba_device *ui; 161 register struct uda_softc *sc; 162 int s; 163 164 #ifdef lint 165 flag = flag; 166 #endif 167 unit = minor(dev) >> 3; 168 if (unit >= NRA || (ui = uddinfo[unit]) == 0 || ui->ui_alive == 0) 169 return (ENXIO); 170 sc = &uda_softc[ui->ui_ctlr]; 171 s = spl5(); 172 if (sc->sc_state != S_RUN) { 173 if (sc->sc_state == S_IDLE) 174 udinit(ui->ui_ctlr); 175 /* wait for initialization to complete */ 176 sleep((caddr_t)ui->ui_mi, 0); 177 if (sc->sc_state != S_RUN) 178 return (EIO); 179 } 180 splx(s); 181 /* SHOULD PROBABLY FORCE AN ONLINE ATTEMPT 182 TO SEE IF DISK IS REALLY THERE */ 183 return (0); 184 } 185 186 /* 187 * Initialize a UDA. Set up UBA mapping registers, 188 * initialize data structures, and start hardware 189 * initialization sequence. 190 */ 191 udinit(d) 192 int d; 193 { 194 register struct uda_softc *sc; 195 register struct uda *ud; 196 struct udadevice *udaddr; 197 struct uba_ctlr *um; 198 199 sc = &uda_softc[d]; 200 um = udminfo[d]; 201 um->um_tab.b_active++; 202 ud = &uda[d]; 203 udaddr = (struct udadevice *)um->um_addr; 204 if (sc->sc_mapped == 0) { 205 /* 206 * Map the communications area and command 207 * and response packets into Unibus address 208 * space. 209 */ 210 sc->sc_ubainfo = uballoc(um->um_ubanum, (caddr_t)ud, 211 sizeof (struct uda), 0); 212 sc->sc_uda = (struct uda *)(sc->sc_ubainfo & 0x3ffff); 213 sc->sc_mapped = 1; 214 } 215 216 /* 217 * Start the hardware initialization sequence. 218 */ 219 udaddr->udaip = 0; /* start initialization */ 220 while ((udaddr->udasa & UDA_STEP1) == 0) 221 ; 222 udaddr->udasa = UDA_ERR|(NCMDL2<<11)|(NRSPL2<<8)|UDA_IE|(sc->sc_ivec/4); 223 /* 224 * Initialization continues in interrupt routine. 225 */ 226 sc->sc_state = S_STEP1; 227 sc->sc_credits = 0; 228 } 229 230 udstrategy(bp) 231 register struct buf *bp; 232 { 233 register struct uba_device *ui; 234 register struct uba_ctlr *um; 235 register struct buf *dp; 236 register int unit; 237 int xunit = minor(bp->b_dev) & 07; 238 daddr_t sz, maxsz; 239 int s; 240 241 sz = (bp->b_bcount+511) >> 9; 242 unit = dkunit(bp); 243 if (unit >= NRA) 244 goto bad; 245 ui = uddinfo[unit]; 246 um = ui->ui_mi; 247 if (ui == 0 || ui->ui_alive == 0) 248 goto bad; 249 if ((maxsz = ra_sizes[xunit].nblocks) < 0) 250 maxsz = radsize[unit] - ra_sizes[xunit].blkoff; 251 if (bp->b_blkno < 0 || bp->b_blkno+sz > maxsz || 252 ra_sizes[xunit].blkoff >= radsize[unit]) 253 goto bad; 254 s = spl5(); 255 /* 256 * Link the buffer onto the drive queue 257 */ 258 dp = &udutab[ui->ui_unit]; 259 if (dp->b_actf == 0) 260 dp->b_actf = bp; 261 else 262 dp->b_actl->av_forw = bp; 263 dp->b_actl = bp; 264 bp->av_forw = 0; 265 /* 266 * Link the drive onto the controller queue 267 */ 268 if (dp->b_active == 0) { 269 dp->b_forw = NULL; 270 if (um->um_tab.b_actf == NULL) 271 um->um_tab.b_actf = dp; 272 else 273 um->um_tab.b_actl->b_forw = dp; 274 um->um_tab.b_actl = dp; 275 dp->b_active = 1; 276 } 277 if (um->um_tab.b_active == 0) { 278 #if defined(VAX750) 279 if (cpu == VAX_750) { 280 if (um->um_ubinfo != 0) 281 printf("uda: ubinfo %x\n",um->um_ubinfo); 282 else 283 um->um_ubinfo = 284 uballoc(um->um_ubanum, (caddr_t)0, 0, 285 UBA_NEEDBDP); 286 } 287 #endif 288 (void) udstart(um); 289 } 290 splx(s); 291 return; 292 293 bad: 294 bp->b_flags |= B_ERROR; 295 iodone(bp); 296 return; 297 } 298 299 udstart(um) 300 register struct uba_ctlr *um; 301 { 302 register struct buf *bp, *dp; 303 register struct mscp *mp; 304 register struct uda_softc *sc; 305 register struct uba_device *ui; 306 struct udadevice *udaddr; 307 int i; 308 309 sc = &uda_softc[um->um_ctlr]; 310 311 loop: 312 if ((dp = um->um_tab.b_actf) == NULL) { 313 /* 314 * Release uneeded UBA resources and return 315 */ 316 um->um_tab.b_active = 0; 317 #if defined(VAX750) 318 if (cpu == VAX_750) { 319 if (um->um_ubinfo != 0) 320 ubarelse(um->um_ubanum, &um->um_ubinfo); 321 } 322 #endif 323 return (0); 324 } 325 if ((bp = dp->b_actf) == NULL) { 326 /* 327 * No more requests for this drive, remove 328 * from controller queue and look at next drive. 329 * We know we're at the head of the controller queue. 330 */ 331 dp->b_active = 0; 332 um->um_tab.b_actf = dp->b_forw; 333 goto loop; 334 } 335 um->um_tab.b_active++; 336 udaddr = (struct udadevice *)um->um_addr; 337 if ((udaddr->udasa&UDA_ERR) || sc->sc_state != S_RUN) { 338 harderr(bp, "ra"); 339 printf("udasa %o, state %d\n", udaddr->udasa&0xffff, sc->sc_state); 340 udinit(um->um_ctlr); 341 /* SHOULD REQUEUE OUTSTANDING REQUESTS, LIKE UDRESET */ 342 return (0); 343 } 344 ui = uddinfo[dkunit(bp)]; 345 /* 346 * If no credits, can't issue any commands 347 * until some outstanding commands complete. 348 */ 349 if (sc->sc_credits < 2) 350 return (0); 351 if ((mp = udgetcp(um)) == NULL) 352 return (0); 353 sc->sc_credits--; /* committed to issuing a command */ 354 if (ui->ui_flags == 0) { /* not online */ 355 mp->mscp_opcode = M_OP_ONLIN; 356 mp->mscp_unit = ui->ui_slave; 357 dp->b_active = 2; 358 um->um_tab.b_actf = dp->b_forw; /* remove from controller q */ 359 printd("uda: bring unit %d online\n", ui->ui_slave); 360 *((long *)mp->mscp_dscptr) |= UDA_OWN|UDA_INT; 361 i = udaddr->udaip; 362 goto loop; 363 } 364 switch (cpu) { 365 case VAX_780: 366 i = UBA_NEEDBDP|UBA_CANTWAIT; 367 break; 368 369 case VAX_750: 370 i = um->um_ubinfo|UBA_HAVEBDP|UBA_CANTWAIT; 371 break; 372 373 case VAX_730: 374 i = UBA_CANTWAIT; 375 break; 376 } 377 if ((i = ubasetup(um->um_ubanum, bp, i)) == 0) { 378 mp->mscp_opcode = M_OP_GTUNT; 379 mp->mscp_unit = ui->ui_slave; 380 *((long *)mp->mscp_dscptr) |= UDA_OWN|UDA_INT; 381 i = udaddr->udaip; /* initiate polling */ 382 return(1); /* wait for interrupt */ 383 } 384 mp->mscp_cmdref = (long)bp; /* pointer to get back */ 385 mp->mscp_opcode = bp->b_flags&B_READ ? M_OP_READ : M_OP_WRITE; 386 mp->mscp_unit = ui->ui_slave; 387 mp->mscp_lbn = bp->b_blkno + ra_sizes[minor(bp->b_dev)&7].blkoff; 388 mp->mscp_bytecnt = bp->b_bcount; 389 mp->mscp_buffer = (i & 0x3ffff) | (((i>>28)&0xf)<<24); 390 #if defined(VAX750) 391 if (cpu == VAX_750) 392 i &= 0xfffffff; /* mask off bdp */ 393 #endif 394 bp->b_ubinfo = i; /* save mapping info */ 395 *((long *)mp->mscp_dscptr) |= UDA_OWN|UDA_INT; 396 i = udaddr->udaip; /* initiate polling */ 397 if (ui->ui_dk >= 0) { 398 dk_busy |= 1<<ui->ui_dk; 399 dp->b_qsize++; 400 dk_xfer[ui->ui_dk]++; 401 dk_wds[ui->ui_dk] += bp->b_bcount>>6; 402 } 403 404 /* 405 * Move drive to the end of the controller queue 406 */ 407 if (dp->b_forw != NULL) { 408 um->um_tab.b_actf = dp->b_forw; 409 um->um_tab.b_actl->b_forw = dp; 410 um->um_tab.b_actl = dp; 411 dp->b_forw = NULL; 412 } 413 /* 414 * Move buffer to I/O wait queue 415 */ 416 dp->b_actf = bp->av_forw; 417 dp = &udwtab[um->um_ctlr]; 418 bp->av_forw = dp; 419 bp->av_back = dp->av_back; 420 dp->av_back->av_forw = bp; 421 dp->av_back = bp; 422 goto loop; 423 } 424 425 /* 426 * UDA interrupt routine. 427 */ 428 udintr(d) 429 int d; 430 { 431 register struct uba_ctlr *um = udminfo[d]; 432 register struct udadevice *udaddr = (struct udadevice *)um->um_addr; 433 struct buf *bp; 434 register int i; 435 register struct uda_softc *sc = &uda_softc[d]; 436 register struct uda *ud = &uda[d]; 437 struct uda *uud; 438 struct mscp *mp; 439 440 printd("udintr: state %d, udasa %o\n", sc->sc_state, udaddr->udasa); 441 switch (sc->sc_state) { 442 case S_IDLE: 443 printf("uda%d: random interrupt ignored\n", d); 444 return; 445 446 case S_STEP1: 447 #define STEP1MASK 0174377 448 #define STEP1GOOD (UDA_STEP2|UDA_IE|(NCMDL2<<3)|NRSPL2) 449 if ((udaddr->udasa&STEP1MASK) != STEP1GOOD) { 450 sc->sc_state = S_IDLE; 451 wakeup((caddr_t)um); 452 return; 453 } 454 udaddr->udasa = ((int)&sc->sc_uda->uda_ca.ca_ringbase)| 455 (cpu == VAX_780 ? UDA_PI : 0); 456 sc->sc_state = S_STEP2; 457 return; 458 459 case S_STEP2: 460 #define STEP2MASK 0174377 461 #define STEP2GOOD (UDA_STEP3|UDA_IE|(sc->sc_ivec/4)) 462 if ((udaddr->udasa&STEP2MASK) != STEP2GOOD) { 463 sc->sc_state = S_IDLE; 464 wakeup((caddr_t)um); 465 return; 466 } 467 udaddr->udasa = ((int)&sc->sc_uda->uda_ca.ca_ringbase)>>16; 468 sc->sc_state = S_STEP3; 469 return; 470 471 case S_STEP3: 472 #define STEP3MASK 0174000 473 #define STEP3GOOD UDA_STEP4 474 if ((udaddr->udasa&STEP3MASK) != STEP3GOOD) { 475 sc->sc_state = S_IDLE; 476 wakeup((caddr_t)um); 477 return; 478 } 479 udaddr->udasa = UDA_GO; 480 sc->sc_state = S_SCHAR; 481 482 /* 483 * Initialize the data structures. 484 */ 485 uud = sc->sc_uda; 486 for (i = 0; i < NRSP; i++) { 487 ud->uda_ca.ca_rspdsc[i] = UDA_OWN|UDA_INT| 488 (long)&uud->uda_rsp[i].mscp_cmdref; 489 ud->uda_rsp[i].mscp_dscptr = &ud->uda_ca.ca_rspdsc[i]; 490 ud->uda_rsp[i].mscp_header.uda_msglen = sizeof (struct mscp); 491 } 492 for (i = 0; i < NCMD; i++) { 493 ud->uda_ca.ca_cmddsc[i] = UDA_INT| 494 (long)&uud->uda_cmd[i].mscp_cmdref; 495 ud->uda_cmd[i].mscp_dscptr = &ud->uda_ca.ca_cmddsc[i]; 496 ud->uda_cmd[i].mscp_header.uda_msglen = sizeof (struct mscp); 497 } 498 bp = &udwtab[d]; 499 bp->av_forw = bp->av_back = bp; 500 sc->sc_lastcmd = 0; 501 sc->sc_lastrsp = 0; 502 if ((mp = udgetcp(um)) == NULL) { 503 sc->sc_state = S_IDLE; 504 wakeup((caddr_t)um); 505 return; 506 } 507 mp->mscp_opcode = M_OP_STCON; 508 mp->mscp_cntflgs = M_CF_ATTN|M_CF_MISC|M_CF_THIS; 509 *((long *)mp->mscp_dscptr) |= UDA_OWN|UDA_INT; 510 i = udaddr->udaip; /* initiate polling */ 511 return; 512 513 case S_SCHAR: 514 case S_RUN: 515 break; 516 517 default: 518 printf("uda%d: interrupt in unknown state %d ignored\n", 519 d, sc->sc_state); 520 return; 521 } 522 523 if (udaddr->udasa&UDA_ERR) { 524 printf("uda%d: fatal error (%o)\n", d, udaddr->udasa&0xffff); 525 udaddr->udaip = 0; 526 wakeup((caddr_t)um); 527 } 528 529 /* 530 * Check for a buffer purge request. 531 */ 532 if (ud->uda_ca.ca_bdp) { 533 /* 534 * THIS IS A KLUDGE. 535 * Maybe we should change the entire 536 * UBA interface structure. 537 */ 538 int s = spl7(); 539 540 i = um->um_ubinfo; 541 printd("uda: purge bdp %d\n", ud->uda_ca.ca_bdp); 542 um->um_ubinfo = ud->uda_ca.ca_bdp<<28; 543 ubapurge(um); 544 um->um_ubinfo = i; 545 (void) splx(s); 546 ud->uda_ca.ca_bdp = 0; 547 udaddr->udasa = 0; /* signal purge complete */ 548 } 549 550 /* 551 * Check for response ring transition. 552 */ 553 if (ud->uda_ca.ca_rspint) { 554 ud->uda_ca.ca_rspint = 0; 555 for (i = sc->sc_lastrsp;; i++) { 556 i %= NRSP; 557 if (ud->uda_ca.ca_rspdsc[i]&UDA_OWN) 558 break; 559 udrsp(um, ud, sc, i); 560 ud->uda_ca.ca_rspdsc[i] |= UDA_OWN; 561 } 562 sc->sc_lastrsp = i; 563 } 564 565 /* 566 * Check for command ring transition. 567 */ 568 if (ud->uda_ca.ca_cmdint) { 569 printd("uda: command ring transition\n"); 570 ud->uda_ca.ca_cmdint = 0; 571 } 572 (void) udstart(um); 573 } 574 575 /* 576 * Process a response packet 577 */ 578 udrsp(um, ud, sc, i) 579 register struct uba_ctlr *um; 580 register struct uda *ud; 581 register struct uda_softc *sc; 582 int i; 583 { 584 register struct mscp *mp; 585 struct uba_device *ui; 586 struct buf *dp, *bp; 587 int st; 588 589 mp = &ud->uda_rsp[i]; 590 mp->mscp_header.uda_msglen = sizeof (struct mscp); 591 sc->sc_credits += mp->mscp_header.uda_credits & 0xf; 592 if ((mp->mscp_header.uda_credits & 0xf0) > 0x10) 593 return; 594 /* 595 * If it's an error log message (datagram), 596 * pass it on for more extensive processing. 597 */ 598 if ((mp->mscp_header.uda_credits & 0xf0) == 0x10) { 599 uderror(um, (struct mslg *)mp); 600 return; 601 } 602 if (mp->mscp_unit >= 8) 603 return; 604 if ((ui = udip[um->um_ctlr][mp->mscp_unit]) == 0) 605 return; 606 st = mp->mscp_status&M_ST_MASK; 607 switch (mp->mscp_opcode) { 608 case M_OP_STCON|M_OP_END: 609 if (st == M_ST_SUCC) 610 sc->sc_state = S_RUN; 611 else 612 sc->sc_state = S_IDLE; 613 um->um_tab.b_active = 0; 614 wakeup((caddr_t)um); 615 break; 616 617 case M_OP_ONLIN|M_OP_END: 618 /* 619 * Link the drive onto the controller queue 620 */ 621 dp = &udutab[ui->ui_unit]; 622 dp->b_forw = NULL; 623 if (um->um_tab.b_actf == NULL) 624 um->um_tab.b_actf = dp; 625 else 626 um->um_tab.b_actl->b_forw = dp; 627 um->um_tab.b_actl = dp; 628 if (st == M_ST_SUCC) { 629 ui->ui_flags = 1; /* mark it online */ 630 radsize[ui->ui_unit] = (daddr_t)mp->mscp_untsize; 631 printd("uda: unit %d online\n", mp->mscp_unit); 632 } else { 633 harderr(dp->b_actf, "ra"); 634 printf("OFFLINE\n"); 635 while (bp = dp->b_actf) { 636 dp->b_actf = bp->av_forw; 637 bp->b_flags |= B_ERROR; 638 iodone(bp); 639 } 640 } 641 dp->b_active = 1; 642 break; 643 644 case M_OP_AVATN: 645 printd("uda: unit %d attention\n", mp->mscp_unit); 646 ui->ui_flags = 0; /* it went offline and we didn't notice */ 647 break; 648 649 case M_OP_READ|M_OP_END: 650 case M_OP_WRITE|M_OP_END: 651 bp = (struct buf *)mp->mscp_cmdref; 652 ubarelse(um->um_ubanum, (int *)&bp->b_ubinfo); 653 /* 654 * Unlink buffer from I/O wait queue. 655 */ 656 bp->av_back->av_forw = bp->av_forw; 657 bp->av_forw->av_back = bp->av_back; 658 dp = &udutab[ui->ui_unit]; 659 if (ui->ui_dk >= 0) 660 if (--dp->b_qsize == 0) 661 dk_busy &= ~(1<<ui->ui_dk); 662 if (st == M_ST_OFFLN || st == M_ST_AVLBL) { 663 ui->ui_flags = 0; /* mark unit offline */ 664 /* 665 * Link the buffer onto the front of the drive queue 666 */ 667 if ((bp->av_forw = dp->b_actf) == 0) 668 dp->b_actl = bp; 669 dp->b_actf = bp; 670 /* 671 * Link the drive onto the controller queue 672 */ 673 if (dp->b_active == 0) { 674 dp->b_forw = NULL; 675 if (um->um_tab.b_actf == NULL) 676 um->um_tab.b_actf = dp; 677 else 678 um->um_tab.b_actl->b_forw = dp; 679 um->um_tab.b_actl = dp; 680 dp->b_active = 1; 681 } 682 return; 683 } 684 if (st != M_ST_SUCC) { 685 harderr(bp, "ra"); 686 printf("status %o\n", mp->mscp_status); 687 bp->b_flags |= B_ERROR; 688 } 689 bp->b_resid = bp->b_bcount - mp->mscp_bytecnt; 690 iodone(bp); 691 break; 692 693 case M_OP_GTUNT|M_OP_END: 694 break; 695 696 default: 697 printf("uda: unknown packet\n"); 698 } 699 } 700 701 702 /* 703 * Process an error log message 704 * 705 * For now, just log the error on the console. 706 * Only minimal decoding is done, only "useful" 707 * information is printed. Eventually should 708 * send message to an error logger. 709 */ 710 uderror(um, mp) 711 register struct uba_ctlr *um; 712 register struct mslg *mp; 713 { 714 printf("uda%d: %s error, ", um->um_ctlr, 715 mp->mslg_flags&M_LF_SUCC ? "soft" : "hard"); 716 switch (mp->mslg_format) { 717 case M_FM_CNTERR: 718 printf("controller error, event 0%o\n", mp->mslg_event); 719 break; 720 721 case M_FM_BUSADDR: 722 printf("host memory access error, event 0%o, addr 0%o\n", 723 mp->mslg_event, mp->mslg_busaddr); 724 break; 725 726 case M_FM_DISKTRN: 727 printf("disk transfer error, unit %d\n", mp->mslg_unit); 728 break; 729 730 case M_FM_SDI: 731 printf("SDI error, unit %d, event 0%o\n", mp->mslg_unit, 732 mp->mslg_event); 733 break; 734 735 case M_FM_SMLDSK: 736 printf("small disk error, unit %d, event 0%o, cyl %d\n", 737 mp->mslg_unit, mp->mslg_event, mp->mslg_sdecyl); 738 break; 739 740 default: 741 printf("unknown error, unit %d, format 0%o, event 0%o\n", 742 mp->mslg_unit, mp->mslg_format, mp->mslg_event); 743 } 744 745 if (udaerror) { 746 register long *p = (long *)mp; 747 register int i; 748 749 for (i = 0; i < mp->mslg_header.uda_msglen; i += sizeof(*p)) 750 printf("%x ", *p++); 751 printf("\n"); 752 } 753 } 754 755 756 /* 757 * Find an unused command packet 758 */ 759 struct mscp * 760 udgetcp(um) 761 struct uba_ctlr *um; 762 { 763 register struct mscp *mp; 764 register struct udaca *cp; 765 register struct uda_softc *sc; 766 register int i; 767 768 cp = &uda[um->um_ctlr].uda_ca; 769 sc = &uda_softc[um->um_ctlr]; 770 i = sc->sc_lastcmd; 771 if ((cp->ca_cmddsc[i] & (UDA_OWN|UDA_INT)) == UDA_INT) { 772 cp->ca_cmddsc[i] &= ~UDA_INT; 773 mp = &uda[um->um_ctlr].uda_cmd[i]; 774 mp->mscp_unit = mp->mscp_modifier = 0; 775 mp->mscp_opcode = mp->mscp_flags = 0; 776 mp->mscp_bytecnt = mp->mscp_buffer = 0; 777 mp->mscp_errlgfl = mp->mscp_copyspd = 0; 778 sc->sc_lastcmd = (i + 1) % NCMD; 779 return(mp); 780 } 781 return(NULL); 782 } 783 784 udread(dev, uio) 785 dev_t dev; 786 struct uio *uio; 787 { 788 register int unit = minor(dev) >> 3; 789 790 if (unit >= NRA) 791 return (ENXIO); 792 return (physio(udstrategy, &rudbuf[unit], dev, B_READ, minphys, uio)); 793 } 794 795 udwrite(dev, uio) 796 dev_t dev; 797 struct uio *uio; 798 { 799 register int unit = minor(dev) >> 3; 800 801 if (unit >= NRA) 802 return (ENXIO); 803 return (physio(udstrategy, &rudbuf[unit], dev, B_WRITE, minphys, uio)); 804 } 805 806 udreset(uban) 807 int uban; 808 { 809 register struct uba_ctlr *um; 810 register struct uba_device *ui; 811 register struct buf *bp, *dp; 812 register int unit; 813 struct buf *nbp; 814 int d; 815 816 for (d = 0; d < NUDA; d++) { 817 if ((um = udminfo[d]) == 0 || um->um_ubanum != uban || 818 um->um_alive == 0) 819 continue; 820 printf(" uda%d", d); 821 um->um_tab.b_active = 0; 822 um->um_tab.b_actf = um->um_tab.b_actl = 0; 823 uda_softc[d].sc_state = S_IDLE; 824 for (unit = 0; unit < NRA; unit++) { 825 if ((ui = uddinfo[unit]) == 0) 826 continue; 827 if (ui->ui_alive == 0 || ui->ui_mi != um) 828 continue; 829 udutab[unit].b_active = 0; 830 udutab[unit].b_qsize = 0; 831 } 832 for (bp = udwtab[d].av_forw; bp != &udwtab[d]; bp = nbp) { 833 nbp = bp->av_forw; 834 bp->b_ubinfo = 0; 835 /* 836 * Link the buffer onto the drive queue 837 */ 838 dp = &udutab[dkunit(bp)]; 839 if (dp->b_actf == 0) 840 dp->b_actf = bp; 841 else 842 dp->b_actl->av_forw = bp; 843 dp->b_actl = bp; 844 bp->av_forw = 0; 845 /* 846 * Link the drive onto the controller queue 847 */ 848 if (dp->b_active == 0) { 849 dp->b_forw = NULL; 850 if (um->um_tab.b_actf == NULL) 851 um->um_tab.b_actf = dp; 852 else 853 um->um_tab.b_actl->b_forw = dp; 854 um->um_tab.b_actl = dp; 855 dp->b_active = 1; 856 } 857 } 858 udinit(d); 859 } 860 } 861 862 uddump() 863 { 864 return(ENXIO); 865 } 866