| 1 | /* uda.c 4.4 82/05/26 */ |
| 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 | |
| 16 | #include "../h/param.h" |
| 17 | #include "../h/systm.h" |
| 18 | #include "../h/buf.h" |
| 19 | #include "../h/conf.h" |
| 20 | #include "../h/dir.h" |
| 21 | #include "../h/user.h" |
| 22 | #include "../h/pte.h" |
| 23 | #include "../h/map.h" |
| 24 | #include "../h/vm.h" |
| 25 | #include "../h/ubareg.h" |
| 26 | #include "../h/ubavar.h" |
| 27 | #include "../h/dk.h" |
| 28 | #include "../h/cpu.h" |
| 29 | #include "../h/cmap.h" |
| 30 | |
| 31 | int udadebug; |
| 32 | #define printd if(udadebug&1)printf |
| 33 | |
| 34 | /* |
| 35 | * Parameters for the communications area |
| 36 | */ |
| 37 | |
| 38 | #define NRSPL2 3 |
| 39 | #define NCMDL2 3 |
| 40 | #define NRSP (1<<NRSPL2) |
| 41 | #define NCMD (1<<NCMDL2) |
| 42 | |
| 43 | #include "../h/udareg.h" |
| 44 | #include "../h/mscp.h" |
| 45 | |
| 46 | struct uda_softc { |
| 47 | short sc_state; /* state of controller */ |
| 48 | short sc_mapped; /* Unibus map allocated for uda struct? */ |
| 49 | int sc_ubainfo; /* Unibus mapping info */ |
| 50 | struct uda *sc_uda; /* Unibus address of uda struct */ |
| 51 | int sc_ivec; /* interrupt vector address */ |
| 52 | short sc_credits; /* transfer credits */ |
| 53 | short sc_lastcmd; /* pointer into command ring */ |
| 54 | short sc_lastrsp; /* pointer into response ring */ |
| 55 | } uda_softc[NUDA]; |
| 56 | |
| 57 | /* |
| 58 | * Controller states |
| 59 | */ |
| 60 | #define S_IDLE 0 /* hasn't been initialized */ |
| 61 | #define S_STEP1 1 /* doing step 1 init */ |
| 62 | #define S_STEP2 2 /* doing step 2 init */ |
| 63 | #define S_STEP3 3 /* doing step 3 init */ |
| 64 | #define S_SCHAR 4 /* doing "set controller characteristics" */ |
| 65 | #define S_RUN 5 /* running */ |
| 66 | |
| 67 | struct uda { |
| 68 | struct udaca uda_ca; /* communications area */ |
| 69 | struct mscp uda_rsp[NRSP]; /* response packets */ |
| 70 | struct mscp uda_cmd[NCMD]; /* command packets */ |
| 71 | } uda[NUDA]; |
| 72 | |
| 73 | /* THIS SHOULD BE READ OFF THE PACK, PER DRIVE */ |
| 74 | struct size { |
| 75 | daddr_t nblocks; |
| 76 | daddr_t blkoff; |
| 77 | } ra_sizes[8] ={ |
| 78 | 15884, 0, /* A=blk 0 thru 15883 */ |
| 79 | 33440, 15884, /* B=blk 15884 thru 49323 */ |
| 80 | -1, 0, /* C=blk 0 thru end */ |
| 81 | 0, 0, /* D reserved for RA81 */ |
| 82 | 0, 0, /* E reserved for RA81 */ |
| 83 | 0, 0, /* F reserved for RA81 */ |
| 84 | 82080, 49324, /* G=blk 49324 thru 131403 */ |
| 85 | -1, 131404, /* H=blk 131404 thru end */ |
| 86 | }; |
| 87 | /* END OF STUFF WHICH SHOULD BE READ IN PER DISK */ |
| 88 | |
| 89 | daddr_t radsize[NRA]; /* disk size, from ONLINE end packet */ |
| 90 | |
| 91 | int udprobe(), udslave(), udattach(), udintr(); |
| 92 | struct mscp *udgetcp(); |
| 93 | struct uba_ctlr *udminfo[NUDA]; |
| 94 | struct uba_device *uddinfo[NRA]; |
| 95 | struct uba_device *udip[NUDA][8]; /* 8 == max number of drives */ |
| 96 | |
| 97 | u_short udstd[] = { 0777550, 0 }; |
| 98 | struct uba_driver udadriver = |
| 99 | { udprobe, udslave, udattach, 0, udstd, "ra", uddinfo, "uda", udminfo, 0 }; |
| 100 | struct buf rudbuf[NRA]; |
| 101 | struct buf udutab[NRA]; |
| 102 | struct buf udwtab[NUDA]; /* I/O wait queue, per controller */ |
| 103 | |
| 104 | #define b_qsize b_resid /* queue size per drive, in udutab */ |
| 105 | #define b_ubinfo b_resid /* Unibus mapping info, per buffer */ |
| 106 | |
| 107 | udprobe(reg, ctlr) |
| 108 | caddr_t reg; |
| 109 | int ctlr; |
| 110 | { |
| 111 | register int br, cvec; |
| 112 | register struct uda_softc *sc = &uda_softc[ctlr]; |
| 113 | |
| 114 | #ifdef lint |
| 115 | br = 0; cvec = br; br = cvec; reg = reg; |
| 116 | udread(0); udwrite(0); udreset(0); udintr(0); |
| 117 | #endif |
| 118 | /* SHOULD CHECK THAT IT REALLY IS A UDA */ |
| 119 | br = 0x15; |
| 120 | cvec = sc->sc_ivec = (uba_hd[numuba].uh_lastiv -= 4); |
| 121 | return(1); |
| 122 | } |
| 123 | |
| 124 | udslave(ui, reg) |
| 125 | struct uba_device *ui; |
| 126 | caddr_t reg; |
| 127 | { |
| 128 | /* |
| 129 | * TOO HARD TO FIND OUT IF DISK IS THERE UNTIL |
| 130 | * INITIALIZED. WE'LL FIND OUT WHEN WE FIRST |
| 131 | * TRY TO ACCESS IT. |
| 132 | */ |
| 133 | #ifdef lint |
| 134 | ui = ui; reg = reg; |
| 135 | #endif |
| 136 | return(1); |
| 137 | } |
| 138 | |
| 139 | udattach(ui) |
| 140 | register struct uba_device *ui; |
| 141 | { |
| 142 | |
| 143 | if (ui->ui_dk > 0) |
| 144 | dk_mspw[ui->ui_dk] = 1.0 / (60 * 31 * 256); /* approx */ |
| 145 | ui->ui_flags = 0; |
| 146 | udip[ui->ui_ctlr][ui->ui_slave] = ui; |
| 147 | radsize[ui->ui_unit] = (daddr_t)0xffffff; /* max possible size */ |
| 148 | } |
| 149 | |
| 150 | /* |
| 151 | * Open a UDA. Initialize the device and |
| 152 | * set the unit online. |
| 153 | */ |
| 154 | udopen(dev, flag) |
| 155 | dev_t dev; |
| 156 | int flag; |
| 157 | { |
| 158 | register int unit; |
| 159 | register struct uba_device *ui; |
| 160 | register struct uda_softc *sc; |
| 161 | int s; |
| 162 | |
| 163 | #ifdef lint |
| 164 | flag = flag; |
| 165 | #endif |
| 166 | unit = minor(dev) >> 3; |
| 167 | if (unit >= NRA || (ui = uddinfo[unit]) == 0 || ui->ui_alive == 0) { |
| 168 | u.u_error = ENXIO; |
| 169 | return; |
| 170 | } |
| 171 | sc = &uda_softc[ui->ui_ctlr]; |
| 172 | s = spl5(); |
| 173 | if (sc->sc_state != S_RUN) { |
| 174 | if (sc->sc_state == S_IDLE) |
| 175 | udinit(ui->ui_ctlr); |
| 176 | /* wait for initialization to complete */ |
| 177 | sleep((caddr_t)ui->ui_mi, 0); |
| 178 | if (sc->sc_state != S_RUN) { |
| 179 | u.u_error = EIO; |
| 180 | return; |
| 181 | } |
| 182 | } |
| 183 | splx(s); |
| 184 | /* SHOULD PROBABLY FORCE AN ONLINE ATTEMPT |
| 185 | TO SEE IF DISK IS REALLY THERE */ |
| 186 | } |
| 187 | |
| 188 | /* |
| 189 | * Initialize a UDA. Set up UBA mapping registers, |
| 190 | * initialize data structures, and start hardware |
| 191 | * initialization sequence. |
| 192 | */ |
| 193 | udinit(d) |
| 194 | int d; |
| 195 | { |
| 196 | register struct uda_softc *sc; |
| 197 | register struct uda *ud; |
| 198 | struct udadevice *udaddr; |
| 199 | struct uba_ctlr *um; |
| 200 | |
| 201 | sc = &uda_softc[d]; |
| 202 | um = udminfo[d]; |
| 203 | um->um_tab.b_active++; |
| 204 | ud = &uda[d]; |
| 205 | udaddr = (struct udadevice *)um->um_addr; |
| 206 | if (sc->sc_mapped == 0) { |
| 207 | /* |
| 208 | * Map the communications area and command |
| 209 | * and response packets into Unibus address |
| 210 | * space. |
| 211 | */ |
| 212 | sc->sc_ubainfo = uballoc(um->um_ubanum, (caddr_t)ud, |
| 213 | sizeof (struct uda), 0); |
| 214 | sc->sc_uda = (struct uda *)(sc->sc_ubainfo & 0x3ffff); |
| 215 | sc->sc_mapped = 1; |
| 216 | } |
| 217 | |
| 218 | /* |
| 219 | * Start the hardware initialization sequence. |
| 220 | */ |
| 221 | udaddr->udaip = 0; /* start initialization */ |
| 222 | while ((udaddr->udasa & UDA_STEP1) == 0) |
| 223 | ; |
| 224 | udaddr->udasa = UDA_ERR|(NCMDL2<<11)|(NRSPL2<<8)|UDA_IE|(sc->sc_ivec/4); |
| 225 | /* |
| 226 | * Initialization continues in interrupt routine. |
| 227 | */ |
| 228 | sc->sc_state = S_STEP1; |
| 229 | sc->sc_credits = 0; |
| 230 | } |
| 231 | |
| 232 | udstrategy(bp) |
| 233 | register struct buf *bp; |
| 234 | { |
| 235 | register struct uba_device *ui; |
| 236 | register struct uba_ctlr *um; |
| 237 | register struct buf *dp; |
| 238 | register int unit; |
| 239 | int xunit = minor(bp->b_dev) & 07; |
| 240 | daddr_t sz, maxsz; |
| 241 | int s; |
| 242 | |
| 243 | sz = (bp->b_bcount+511) >> 9; |
| 244 | unit = dkunit(bp); |
| 245 | if (unit >= NRA) |
| 246 | goto bad; |
| 247 | ui = uddinfo[unit]; |
| 248 | um = ui->ui_mi; |
| 249 | if (ui == 0 || ui->ui_alive == 0) |
| 250 | goto bad; |
| 251 | if ((maxsz = ra_sizes[xunit].nblocks) < 0) |
| 252 | maxsz = radsize[unit] - ra_sizes[xunit].blkoff; |
| 253 | if (bp->b_blkno < 0 || bp->b_blkno+sz > maxsz || |
| 254 | ra_sizes[xunit].blkoff >= radsize[unit]) |
| 255 | goto bad; |
| 256 | s = spl5(); |
| 257 | /* |
| 258 | * Link the buffer onto the drive queue |
| 259 | */ |
| 260 | dp = &udutab[ui->ui_unit]; |
| 261 | if (dp->b_actf == 0) |
| 262 | dp->b_actf = bp; |
| 263 | else |
| 264 | dp->b_actl->av_forw = bp; |
| 265 | dp->b_actl = bp; |
| 266 | bp->av_forw = 0; |
| 267 | /* |
| 268 | * Link the drive onto the controller queue |
| 269 | */ |
| 270 | if (dp->b_active == 0) { |
| 271 | dp->b_forw = NULL; |
| 272 | if (um->um_tab.b_actf == NULL) |
| 273 | um->um_tab.b_actf = dp; |
| 274 | else |
| 275 | um->um_tab.b_actl->b_forw = dp; |
| 276 | um->um_tab.b_actl = dp; |
| 277 | dp->b_active = 1; |
| 278 | } |
| 279 | if (um->um_tab.b_active == 0) { |
| 280 | #if defined(VAX750) |
| 281 | if (cpu == VAX_750) { |
| 282 | if (um->um_ubinfo != 0) |
| 283 | printf("uda: ubinfo %x\n",um->um_ubinfo); |
| 284 | else |
| 285 | um->um_ubinfo = |
| 286 | uballoc(um->um_ubanum, (caddr_t)0, 0, |
| 287 | UBA_NEEDBDP); |
| 288 | } |
| 289 | #endif |
| 290 | (void) udstart(um); |
| 291 | } |
| 292 | splx(s); |
| 293 | return; |
| 294 | |
| 295 | bad: |
| 296 | bp->b_flags |= B_ERROR; |
| 297 | iodone(bp); |
| 298 | return; |
| 299 | } |
| 300 | |
| 301 | udstart(um) |
| 302 | register struct uba_ctlr *um; |
| 303 | { |
| 304 | register struct buf *bp, *dp; |
| 305 | register struct mscp *mp; |
| 306 | register struct uda_softc *sc; |
| 307 | register struct uba_device *ui; |
| 308 | struct udadevice *udaddr; |
| 309 | int i; |
| 310 | |
| 311 | sc = &uda_softc[um->um_ctlr]; |
| 312 | |
| 313 | loop: |
| 314 | if ((dp = um->um_tab.b_actf) == NULL) { |
| 315 | /* |
| 316 | * Release uneeded UBA resources and return |
| 317 | */ |
| 318 | um->um_tab.b_active = 0; |
| 319 | #if defined(VAX750) |
| 320 | if (cpu == VAX_750) { |
| 321 | if (um->um_ubinfo == 0) |
| 322 | printf("uda: um_ubinfo == 0\n"); |
| 323 | else |
| 324 | ubarelse(um->um_ubanum, &um->um_ubinfo); |
| 325 | } |
| 326 | #endif |
| 327 | return (0); |
| 328 | } |
| 329 | if ((bp = dp->b_actf) == NULL) { |
| 330 | /* |
| 331 | * No more requests for this drive, remove |
| 332 | * from controller queue and look at next drive. |
| 333 | * We know we're at the head of the controller queue. |
| 334 | */ |
| 335 | dp->b_active = 0; |
| 336 | um->um_tab.b_actf = dp->b_forw; |
| 337 | goto loop; |
| 338 | } |
| 339 | um->um_tab.b_active++; |
| 340 | udaddr = (struct udadevice *)um->um_addr; |
| 341 | if ((udaddr->udasa&UDA_ERR) || sc->sc_state != S_RUN) { |
| 342 | harderr(bp, "ra"); |
| 343 | printf("udasa %o, state %d\n", udaddr->udasa&0xffff, sc->sc_state); |
| 344 | udinit(um->um_ctlr); |
| 345 | /* SHOULD REQUEUE OUTSTANDING REQUESTS, LIKE UDRESET */ |
| 346 | return (0); |
| 347 | } |
| 348 | ui = uddinfo[dkunit(bp)]; |
| 349 | /* |
| 350 | * If no credits, can't issue any commands |
| 351 | * until some outstanding commands complete. |
| 352 | */ |
| 353 | if (sc->sc_credits < 2) |
| 354 | return (0); |
| 355 | if ((mp = udgetcp(um)) == NULL) |
| 356 | return (0); |
| 357 | sc->sc_credits--; /* committed to issuing a command */ |
| 358 | if (ui->ui_flags == 0) { /* not online */ |
| 359 | mp->mscp_opcode = M_OP_ONLIN; |
| 360 | mp->mscp_unit = ui->ui_slave; |
| 361 | dp->b_active = 2; |
| 362 | um->um_tab.b_actf = dp->b_forw; /* remove from controller q */ |
| 363 | printd("uda: bring unit %d online\n", ui->ui_slave); |
| 364 | *((long *)mp->mscp_dscptr) |= UDA_OWN|UDA_INT; |
| 365 | i = udaddr->udaip; |
| 366 | goto loop; |
| 367 | } |
| 368 | switch (cpu) { |
| 369 | case VAX_780: |
| 370 | i = UBA_NEEDBDP|UBA_CANTWAIT; |
| 371 | break; |
| 372 | |
| 373 | case VAX_750: |
| 374 | i = um->um_ubinfo|UBA_HAVEBDP|UBA_CANTWAIT; |
| 375 | break; |
| 376 | |
| 377 | case VAX_730: |
| 378 | i = UBA_CANTWAIT; |
| 379 | break; |
| 380 | } |
| 381 | if ((i = ubasetup(um->um_ubanum, bp, i)) == 0) { |
| 382 | mp->mscp_opcode = M_OP_GTUNT; |
| 383 | mp->mscp_unit = ui->ui_slave; |
| 384 | *((long *)mp->mscp_dscptr) |= UDA_OWN|UDA_INT; |
| 385 | i = udaddr->udaip; /* initiate polling */ |
| 386 | return(1); /* wait for interrupt */ |
| 387 | } |
| 388 | mp->mscp_cmdref = (long)bp; /* pointer to get back */ |
| 389 | mp->mscp_opcode = bp->b_flags&B_READ ? M_OP_READ : M_OP_WRITE; |
| 390 | mp->mscp_unit = ui->ui_slave; |
| 391 | mp->mscp_lbn = bp->b_blkno + ra_sizes[minor(bp->b_dev)&7].blkoff; |
| 392 | mp->mscp_bytecnt = bp->b_bcount; |
| 393 | mp->mscp_buffer = (i & 0x3ffff) | (((i>>28)&0xf)<<24); |
| 394 | #if defined(VAX750) |
| 395 | if (cpu == VAX_750) |
| 396 | i &= 0xfffffff; /* mask off bdp */ |
| 397 | #endif |
| 398 | bp->b_ubinfo = i; /* save mapping info */ |
| 399 | *((long *)mp->mscp_dscptr) |= UDA_OWN|UDA_INT; |
| 400 | i = udaddr->udaip; /* initiate polling */ |
| 401 | if (ui->ui_dk >= 0) { |
| 402 | dk_busy |= 1<<ui->ui_dk; |
| 403 | dp->b_qsize++; |
| 404 | dk_xfer[ui->ui_dk]++; |
| 405 | dk_wds[ui->ui_dk] += bp->b_bcount>>6; |
| 406 | } |
| 407 | |
| 408 | /* |
| 409 | * Move drive to the end of the controller queue |
| 410 | */ |
| 411 | if (dp->b_forw != NULL) { |
| 412 | um->um_tab.b_actf = dp->b_forw; |
| 413 | um->um_tab.b_actl->b_forw = dp; |
| 414 | um->um_tab.b_actl = dp; |
| 415 | dp->b_forw = NULL; |
| 416 | } |
| 417 | /* |
| 418 | * Move buffer to I/O wait queue |
| 419 | */ |
| 420 | dp->b_actf = bp->av_forw; |
| 421 | dp = &udwtab[um->um_ctlr]; |
| 422 | bp->av_forw = dp; |
| 423 | bp->av_back = dp->av_back; |
| 424 | dp->av_back->av_forw = bp; |
| 425 | dp->av_back = bp; |
| 426 | goto loop; |
| 427 | } |
| 428 | |
| 429 | /* |
| 430 | * UDA interrupt routine. |
| 431 | */ |
| 432 | udintr(d) |
| 433 | int d; |
| 434 | { |
| 435 | register struct uba_ctlr *um = udminfo[d]; |
| 436 | register struct udadevice *udaddr = (struct udadevice *)um->um_addr; |
| 437 | struct buf *bp; |
| 438 | register int i; |
| 439 | register struct uda_softc *sc = &uda_softc[d]; |
| 440 | register struct uda *ud = &uda[d]; |
| 441 | struct uda *uud; |
| 442 | struct mscp *mp; |
| 443 | |
| 444 | printd("udintr: state %d, udasa %o\n", sc->sc_state, udaddr->udasa); |
| 445 | switch (sc->sc_state) { |
| 446 | case S_IDLE: |
| 447 | printf("uda%d: random interrupt ignored\n", d); |
| 448 | return; |
| 449 | |
| 450 | case S_STEP1: |
| 451 | #define STEP1GOOD (UDA_STEP2|UDA_IE|(NCMDL2<<3)|NRSPL2) |
| 452 | if ((udaddr->udasa&(UDA_ERR|STEP1GOOD)) != STEP1GOOD) { |
| 453 | sc->sc_state = S_IDLE; |
| 454 | wakeup((caddr_t)um); |
| 455 | return; |
| 456 | } |
| 457 | udaddr->udasa = ((int)&sc->sc_uda->uda_ca.ca_ringbase)| |
| 458 | (cpu == VAX_780 ? UDA_PI : 0); |
| 459 | sc->sc_state = S_STEP2; |
| 460 | return; |
| 461 | |
| 462 | case S_STEP2: |
| 463 | #define STEP2GOOD (UDA_STEP3|UDA_IE|(sc->sc_ivec/4)) |
| 464 | if ((udaddr->udasa&(UDA_ERR|STEP2GOOD)) != STEP2GOOD) { |
| 465 | sc->sc_state = S_IDLE; |
| 466 | wakeup((caddr_t)um); |
| 467 | return; |
| 468 | } |
| 469 | udaddr->udasa = ((int)&sc->sc_uda->uda_ca.ca_ringbase)>>16; |
| 470 | sc->sc_state = S_STEP3; |
| 471 | return; |
| 472 | |
| 473 | case S_STEP3: |
| 474 | #define STEP3GOOD UDA_STEP4 |
| 475 | if ((udaddr->udasa&(UDA_ERR|STEP3GOOD)) != STEP3GOOD) { |
| 476 | sc->sc_state = S_IDLE; |
| 477 | wakeup((caddr_t)um); |
| 478 | return; |
| 479 | } |
| 480 | udaddr->udasa = UDA_GO; |
| 481 | sc->sc_state = S_SCHAR; |
| 482 | |
| 483 | /* |
| 484 | * Initialize the data structures. |
| 485 | */ |
| 486 | uud = sc->sc_uda; |
| 487 | for (i = 0; i < NRSP; i++) { |
| 488 | ud->uda_ca.ca_rspdsc[i] = UDA_OWN|UDA_INT| |
| 489 | (long)&uud->uda_rsp[i].mscp_cmdref; |
| 490 | ud->uda_rsp[i].mscp_dscptr = &ud->uda_ca.ca_rspdsc[i]; |
| 491 | ud->uda_rsp[i].mscp_header.uda_msglen = sizeof (struct mscp); |
| 492 | } |
| 493 | for (i = 0; i < NCMD; i++) { |
| 494 | ud->uda_ca.ca_cmddsc[i] = UDA_INT| |
| 495 | (long)&uud->uda_cmd[i].mscp_cmdref; |
| 496 | ud->uda_cmd[i].mscp_dscptr = &ud->uda_ca.ca_cmddsc[i]; |
| 497 | ud->uda_cmd[i].mscp_header.uda_msglen = sizeof (struct mscp); |
| 498 | } |
| 499 | bp = &udwtab[d]; |
| 500 | bp->av_forw = bp->av_back = bp; |
| 501 | sc->sc_lastcmd = 0; |
| 502 | sc->sc_lastrsp = 0; |
| 503 | if ((mp = udgetcp(um)) == NULL) { |
| 504 | sc->sc_state = S_IDLE; |
| 505 | wakeup((caddr_t)um); |
| 506 | return; |
| 507 | } |
| 508 | mp->mscp_opcode = M_OP_STCON; |
| 509 | mp->mscp_cntflgs = M_CF_ATTN|M_CF_MISC|M_CF_THIS; |
| 510 | *((long *)mp->mscp_dscptr) |= UDA_OWN|UDA_INT; |
| 511 | i = udaddr->udaip; /* initiate polling */ |
| 512 | return; |
| 513 | |
| 514 | case S_SCHAR: |
| 515 | case S_RUN: |
| 516 | break; |
| 517 | |
| 518 | default: |
| 519 | printf("uda%d: interrupt in unknown state %d ignored\n", |
| 520 | d, sc->sc_state); |
| 521 | return; |
| 522 | } |
| 523 | |
| 524 | if (udaddr->udasa&UDA_ERR) { |
| 525 | printf("uda%d: fatal error (%o)\n", d, udaddr->udasa&0xffff); |
| 526 | udaddr->udaip = 0; |
| 527 | wakeup((caddr_t)um); |
| 528 | } |
| 529 | |
| 530 | /* |
| 531 | * Check for a buffer purge request. |
| 532 | */ |
| 533 | if (ud->uda_ca.ca_bdp) { |
| 534 | /* |
| 535 | * THIS IS A KLUDGE. |
| 536 | * Maybe we should change the entire |
| 537 | * UBA interface structure. |
| 538 | */ |
| 539 | int s = spl7(); |
| 540 | |
| 541 | i = um->um_ubinfo; |
| 542 | printd("uda: purge bdp %d\n", ud->uda_ca.ca_bdp); |
| 543 | um->um_ubinfo = ud->uda_ca.ca_bdp<<28; |
| 544 | ubapurge(um); |
| 545 | um->um_ubinfo = i; |
| 546 | (void) splx(s); |
| 547 | ud->uda_ca.ca_bdp = 0; |
| 548 | udaddr->udasa = 0; /* signal purge complete */ |
| 549 | } |
| 550 | |
| 551 | /* |
| 552 | * Check for response ring transition. |
| 553 | */ |
| 554 | if (ud->uda_ca.ca_rspint) { |
| 555 | ud->uda_ca.ca_rspint = 0; |
| 556 | for (i = sc->sc_lastrsp;; i++) { |
| 557 | i %= NRSP; |
| 558 | if (ud->uda_ca.ca_rspdsc[i]&UDA_OWN) |
| 559 | break; |
| 560 | udrsp(um, ud, sc, i); |
| 561 | ud->uda_ca.ca_rspdsc[i] |= UDA_OWN; |
| 562 | } |
| 563 | sc->sc_lastrsp = i; |
| 564 | } |
| 565 | |
| 566 | /* |
| 567 | * Check for command ring transition. |
| 568 | */ |
| 569 | if (ud->uda_ca.ca_cmdint) { |
| 570 | printd("uda: command ring transition\n"); |
| 571 | ud->uda_ca.ca_cmdint = 0; |
| 572 | } |
| 573 | (void) udstart(um); |
| 574 | } |
| 575 | |
| 576 | /* |
| 577 | * Process a response packet |
| 578 | */ |
| 579 | udrsp(um, ud, sc, i) |
| 580 | register struct uba_ctlr *um; |
| 581 | register struct uda *ud; |
| 582 | register struct uda_softc *sc; |
| 583 | int i; |
| 584 | { |
| 585 | register struct mscp *mp; |
| 586 | struct uba_device *ui; |
| 587 | struct buf *dp, *bp; |
| 588 | int st; |
| 589 | |
| 590 | mp = &ud->uda_rsp[i]; |
| 591 | mp->mscp_header.uda_msglen = sizeof (struct mscp); |
| 592 | sc->sc_credits += mp->mscp_header.uda_credits & 0xf; |
| 593 | if ((mp->mscp_header.uda_credits & 0xf0) > 0x10) |
| 594 | return; |
| 595 | /* |
| 596 | * If it's an error log message (datagram), |
| 597 | * pass it on for more extensive processing. |
| 598 | */ |
| 599 | if ((mp->mscp_header.uda_credits & 0xf0) == 0x10) { |
| 600 | uderror(um, (struct mslg *)mp); |
| 601 | return; |
| 602 | } |
| 603 | if (mp->mscp_unit >= 8) |
| 604 | return; |
| 605 | if ((ui = udip[um->um_ctlr][mp->mscp_unit]) == 0) |
| 606 | return; |
| 607 | st = mp->mscp_status&M_ST_MASK; |
| 608 | switch (mp->mscp_opcode) { |
| 609 | case M_OP_STCON|M_OP_END: |
| 610 | if (st == M_ST_SUCC) |
| 611 | sc->sc_state = S_RUN; |
| 612 | else |
| 613 | sc->sc_state = S_IDLE; |
| 614 | um->um_tab.b_active = 0; |
| 615 | wakeup((caddr_t)um); |
| 616 | break; |
| 617 | |
| 618 | case M_OP_ONLIN|M_OP_END: |
| 619 | /* |
| 620 | * Link the drive onto the controller queue |
| 621 | */ |
| 622 | dp = &udutab[ui->ui_unit]; |
| 623 | dp->b_forw = NULL; |
| 624 | if (um->um_tab.b_actf == NULL) |
| 625 | um->um_tab.b_actf = dp; |
| 626 | else |
| 627 | um->um_tab.b_actl->b_forw = dp; |
| 628 | um->um_tab.b_actl = dp; |
| 629 | if (st == M_ST_SUCC) { |
| 630 | ui->ui_flags = 1; /* mark it online */ |
| 631 | radsize[ui->ui_unit] = (daddr_t)mp->mscp_untsize; |
| 632 | printd("uda: unit %d online\n", mp->mscp_unit); |
| 633 | } else { |
| 634 | harderr(dp->b_actf, "ra"); |
| 635 | printf("OFFLINE\n"); |
| 636 | while (bp = dp->b_actf) { |
| 637 | dp->b_actf = bp->av_forw; |
| 638 | bp->b_flags |= B_ERROR; |
| 639 | iodone(bp); |
| 640 | } |
| 641 | } |
| 642 | dp->b_active = 1; |
| 643 | break; |
| 644 | |
| 645 | case M_OP_AVATN: |
| 646 | printd("uda: unit %d attention\n", mp->mscp_unit); |
| 647 | ui->ui_flags = 0; /* it went offline and we didn't notice */ |
| 648 | break; |
| 649 | |
| 650 | case M_OP_READ|M_OP_END: |
| 651 | case M_OP_WRITE|M_OP_END: |
| 652 | bp = (struct buf *)mp->mscp_cmdref; |
| 653 | ubarelse(um->um_ubanum, (int *)&bp->b_resid); |
| 654 | /* |
| 655 | * Unlink buffer from I/O wait queue. |
| 656 | */ |
| 657 | bp->av_back->av_forw = bp->av_forw; |
| 658 | bp->av_forw->av_back = bp->av_back; |
| 659 | dp = &udutab[ui->ui_unit]; |
| 660 | if (ui->ui_dk >= 0) |
| 661 | if (--dp->b_qsize == 0) |
| 662 | dk_busy &= ~(1<<ui->ui_dk); |
| 663 | if (st == M_ST_OFFLN || st == M_ST_AVLBL) { |
| 664 | ui->ui_flags = 0; /* mark unit offline */ |
| 665 | /* |
| 666 | * Link the buffer onto the front of the drive queue |
| 667 | */ |
| 668 | if ((bp->av_forw = dp->b_actf) == 0) |
| 669 | dp->b_actl = bp; |
| 670 | dp->b_actf = bp; |
| 671 | /* |
| 672 | * Link the drive onto the controller queue |
| 673 | */ |
| 674 | if (dp->b_active == 0) { |
| 675 | dp->b_forw = NULL; |
| 676 | if (um->um_tab.b_actf == NULL) |
| 677 | um->um_tab.b_actf = dp; |
| 678 | else |
| 679 | um->um_tab.b_actl->b_forw = dp; |
| 680 | um->um_tab.b_actl = dp; |
| 681 | dp->b_active = 1; |
| 682 | } |
| 683 | return; |
| 684 | } |
| 685 | if (st != M_ST_SUCC) { |
| 686 | harderr(bp, "ra"); |
| 687 | printf("status %o\n", mp->mscp_status); |
| 688 | bp->b_flags |= B_ERROR; |
| 689 | } |
| 690 | bp->b_resid = bp->b_bcount - mp->mscp_bytecnt; |
| 691 | iodone(bp); |
| 692 | break; |
| 693 | |
| 694 | case M_OP_GTUNT|M_OP_END: |
| 695 | break; |
| 696 | |
| 697 | default: |
| 698 | printf("uda: unknown packet\n"); |
| 699 | } |
| 700 | } |
| 701 | |
| 702 | |
| 703 | /* |
| 704 | * Process an error log message |
| 705 | * |
| 706 | * For now, just log the error on the console. |
| 707 | * Only minimal decoding is done, only "useful" |
| 708 | * information is printed. Eventually should |
| 709 | * send message to an error logger. |
| 710 | */ |
| 711 | uderror(um, mp) |
| 712 | register struct uba_ctlr *um; |
| 713 | register struct mslg *mp; |
| 714 | { |
| 715 | printf("uda%d:%d: %s error, ", um->um_ctlr, mp->mslg_seqnum, |
| 716 | mp->mslg_flags&M_LF_SUCC ? "soft" : "hard"); |
| 717 | switch (mp->mslg_format) { |
| 718 | case M_FM_CNTERR: |
| 719 | printf("controller error, event 0%o\n", mp->mslg_event); |
| 720 | break; |
| 721 | |
| 722 | case M_FM_BUSADDR: |
| 723 | printf("host memory access error, event 0%o, addr 0%o\n", |
| 724 | mp->mslg_event, *((long *)&mp->mslg_busaddr[0])); |
| 725 | break; |
| 726 | |
| 727 | case M_FM_DISKTRN: |
| 728 | printf("disk transfer error, unit %d, grp %d, cyl %d, sec %d, ", |
| 729 | mp->mslg_unit, mp->mslg_group, mp->mslg_cylinder, |
| 730 | mp->mslg_sector); |
| 731 | printf("trk %d, lbn %d, retry %d, level %d\n", mp->mslg_track, |
| 732 | mp->mslg_lbn, mp->mslg_retry, mp->mslg_level); |
| 733 | break; |
| 734 | |
| 735 | case M_FM_SDI: |
| 736 | printf("SDI error, unit %d, event 0%o, cyl %d\n", mp->mslg_unit, |
| 737 | mp->mslg_event, mp->mslg_cylinder); |
| 738 | break; |
| 739 | |
| 740 | case M_FM_SMLDSK: |
| 741 | printf("small disk error, unit %d, event 0%o, cyl %d\n", |
| 742 | mp->mslg_unit, mp->mslg_event, mp->mslg_sdecyl); |
| 743 | break; |
| 744 | |
| 745 | default: |
| 746 | printf("unknown error, unit %d, format 0%o, event 0%o\n", |
| 747 | mp->mslg_unit, mp->mslg_format, mp->mslg_event); |
| 748 | } |
| 749 | } |
| 750 | |
| 751 | |
| 752 | /* |
| 753 | * Find an unused command packet |
| 754 | */ |
| 755 | struct mscp * |
| 756 | udgetcp(um) |
| 757 | struct uba_ctlr *um; |
| 758 | { |
| 759 | register struct mscp *mp; |
| 760 | register struct udaca *cp; |
| 761 | register struct uda_softc *sc; |
| 762 | register int i; |
| 763 | |
| 764 | cp = &uda[um->um_ctlr].uda_ca; |
| 765 | sc = &uda_softc[um->um_ctlr]; |
| 766 | i = sc->sc_lastcmd; |
| 767 | if ((cp->ca_cmddsc[i] & (UDA_OWN|UDA_INT)) == UDA_INT) { |
| 768 | cp->ca_cmddsc[i] &= ~UDA_INT; |
| 769 | mp = &uda[um->um_ctlr].uda_cmd[i]; |
| 770 | mp->mscp_unit = mp->mscp_modifier = 0; |
| 771 | mp->mscp_opcode = mp->mscp_flags = 0; |
| 772 | mp->mscp_bytecnt = mp->mscp_buffer = 0; |
| 773 | mp->mscp_errlgfl = mp->mscp_copyspd = 0; |
| 774 | sc->sc_lastcmd = (i + 1) % NCMD; |
| 775 | return(mp); |
| 776 | } |
| 777 | return(NULL); |
| 778 | } |
| 779 | |
| 780 | udread(dev) |
| 781 | dev_t dev; |
| 782 | { |
| 783 | register int unit = minor(dev) >> 3; |
| 784 | |
| 785 | if (unit >= NRA) |
| 786 | u.u_error = ENXIO; |
| 787 | else |
| 788 | physio(udstrategy, &rudbuf[unit], dev, B_READ, minphys); |
| 789 | } |
| 790 | |
| 791 | udwrite(dev) |
| 792 | dev_t dev; |
| 793 | { |
| 794 | register int unit = minor(dev) >> 3; |
| 795 | |
| 796 | if (unit >= NRA) |
| 797 | u.u_error = ENXIO; |
| 798 | else |
| 799 | physio(udstrategy, &rudbuf[unit], dev, B_WRITE, minphys); |
| 800 | } |
| 801 | |
| 802 | udreset(uban) |
| 803 | int uban; |
| 804 | { |
| 805 | register struct uba_ctlr *um; |
| 806 | register struct uba_device *ui; |
| 807 | register struct buf *bp, *dp; |
| 808 | register int unit; |
| 809 | struct buf *nbp; |
| 810 | int d; |
| 811 | |
| 812 | for (d = 0; d < NUDA; d++) { |
| 813 | if ((um = udminfo[d]) == 0 || um->um_ubanum != uban || |
| 814 | um->um_alive == 0) |
| 815 | continue; |
| 816 | printf(" uda%d", d); |
| 817 | um->um_tab.b_active = 0; |
| 818 | um->um_tab.b_actf = um->um_tab.b_actl = 0; |
| 819 | uda_softc[d].sc_state = S_IDLE; |
| 820 | for (unit = 0; unit < NRA; unit++) { |
| 821 | if ((ui = uddinfo[unit]) == 0) |
| 822 | continue; |
| 823 | if (ui->ui_alive == 0 || ui->ui_mi != um) |
| 824 | continue; |
| 825 | udutab[unit].b_active = 0; |
| 826 | udutab[unit].b_qsize = 0; |
| 827 | } |
| 828 | for (bp = udwtab[d].av_forw; bp != &udwtab[d]; bp = nbp) { |
| 829 | nbp = bp->av_forw; |
| 830 | ubarelse(uban, (int *)&bp->b_ubinfo); |
| 831 | /* |
| 832 | * Link the buffer onto the drive queue |
| 833 | */ |
| 834 | dp = &udutab[dkunit(bp)]; |
| 835 | if (dp->b_actf == 0) |
| 836 | dp->b_actf = bp; |
| 837 | else |
| 838 | dp->b_actl->av_forw = bp; |
| 839 | dp->b_actl = bp; |
| 840 | bp->av_forw = 0; |
| 841 | /* |
| 842 | * Link the drive onto the controller queue |
| 843 | */ |
| 844 | if (dp->b_active == 0) { |
| 845 | dp->b_forw = NULL; |
| 846 | if (um->um_tab.b_actf == NULL) |
| 847 | um->um_tab.b_actf = dp; |
| 848 | else |
| 849 | um->um_tab.b_actl->b_forw = dp; |
| 850 | um->um_tab.b_actl = dp; |
| 851 | dp->b_active = 1; |
| 852 | } |
| 853 | } |
| 854 | udinit(d); |
| 855 | } |
| 856 | } |
| 857 | |
| 858 | uddump() |
| 859 | { |
| 860 | return(ENXIO); |
| 861 | } |