1 /* $NetBSD: ncr53c9x.c,v 1.156 2021/12/05 08:16:10 msaitoh Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1994 Peter Galbavy 34 * Copyright (c) 1995 Paul Kranenburg 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by Peter Galbavy 48 * 4. The name of the author may not be used to endorse or promote products 49 * derived from this software without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 52 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 53 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 54 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 55 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 56 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 57 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 59 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 60 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 61 * POSSIBILITY OF SUCH DAMAGE. 62 */ 63 64 /* 65 * Based on aic6360 by Jarle Greipsland 66 * 67 * Acknowledgements: Many of the algorithms used in this driver are 68 * inspired by the work of Julian Elischer (julian (at) tfs.com) and 69 * Charles Hannum (mycroft (at) duality.gnu.ai.mit.edu). Thanks a million! 70 */ 71 72 #include <sys/cdefs.h> 73 __KERNEL_RCSID(0, "$NetBSD: ncr53c9x.c,v 1.156 2021/12/05 08:16:10 msaitoh Exp $"); 74 75 #include <sys/param.h> 76 #include <sys/systm.h> 77 #include <sys/callout.h> 78 #include <sys/kernel.h> 79 #include <sys/errno.h> 80 #include <sys/ioctl.h> 81 #include <sys/device.h> 82 #include <sys/buf.h> 83 #include <sys/malloc.h> 84 #include <sys/proc.h> 85 #include <sys/queue.h> 86 #include <sys/pool.h> 87 #include <sys/scsiio.h> 88 89 #include <dev/scsipi/scsi_spc.h> 90 #include <dev/scsipi/scsi_all.h> 91 #include <dev/scsipi/scsipi_all.h> 92 #include <dev/scsipi/scsiconf.h> 93 #include <dev/scsipi/scsi_message.h> 94 95 #include <dev/ic/ncr53c9xreg.h> 96 #include <dev/ic/ncr53c9xvar.h> 97 98 int ncr53c9x_debug = NCR_SHOWMISC; /*NCR_SHOWPHASE|NCR_SHOWMISC|NCR_SHOWTRAC|NCR_SHOWCMDS;*/ 99 #ifdef DEBUG 100 int ncr53c9x_notag = 0; 101 #endif 102 103 static void ncr53c9x_readregs(struct ncr53c9x_softc *); 104 static void ncr53c9x_select(struct ncr53c9x_softc *, struct ncr53c9x_ecb *); 105 static int ncr53c9x_reselect(struct ncr53c9x_softc *, int, int, int); 106 #if 0 107 static void ncr53c9x_scsi_reset(struct ncr53c9x_softc *); 108 #endif 109 static void ncr53c9x_clear(struct ncr53c9x_softc *, scsipi_xfer_result_t); 110 static int ncr53c9x_poll(struct ncr53c9x_softc *, 111 struct scsipi_xfer *, int); 112 static void ncr53c9x_sched(struct ncr53c9x_softc *); 113 static void ncr53c9x_done(struct ncr53c9x_softc *, struct ncr53c9x_ecb *); 114 static void ncr53c9x_msgin(struct ncr53c9x_softc *); 115 static void ncr53c9x_msgout(struct ncr53c9x_softc *); 116 static void ncr53c9x_timeout(void *arg); 117 static void ncr53c9x_watch(void *arg); 118 static void ncr53c9x_dequeue(struct ncr53c9x_softc *, 119 struct ncr53c9x_ecb *); 120 static int ncr53c9x_ioctl(struct scsipi_channel *, u_long, 121 void *, int, struct proc *); 122 123 void ncr53c9x_sense(struct ncr53c9x_softc *, struct ncr53c9x_ecb *); 124 void ncr53c9x_free_ecb(struct ncr53c9x_softc *, struct ncr53c9x_ecb *); 125 struct ncr53c9x_ecb *ncr53c9x_get_ecb(struct ncr53c9x_softc *, int); 126 127 static inline int ncr53c9x_stp2cpb(struct ncr53c9x_softc *, int); 128 static inline void ncr53c9x_setsync(struct ncr53c9x_softc *, 129 struct ncr53c9x_tinfo *); 130 void ncr53c9x_update_xfer_mode (struct ncr53c9x_softc *, int); 131 static struct ncr53c9x_linfo *ncr53c9x_lunsearch(struct ncr53c9x_tinfo *, 132 int64_t lun); 133 134 static void ncr53c9x_wrfifo(struct ncr53c9x_softc *, uint8_t *, int); 135 136 static int ncr53c9x_rdfifo(struct ncr53c9x_softc *, int); 137 #define NCR_RDFIFO_START 0 138 #define NCR_RDFIFO_CONTINUE 1 139 140 141 #define NCR_SET_COUNT(sc, size) do { \ 142 NCR_WRITE_REG((sc), NCR_TCL, (size)); \ 143 NCR_WRITE_REG((sc), NCR_TCM, (size) >> 8); \ 144 if ((sc->sc_cfg2 & NCRCFG2_FE) || \ 145 (sc->sc_rev == NCR_VARIANT_FAS366)) { \ 146 NCR_WRITE_REG((sc), NCR_TCH, (size) >> 16); \ 147 } \ 148 if (sc->sc_rev == NCR_VARIANT_FAS366) { \ 149 NCR_WRITE_REG(sc, NCR_RCH, 0); \ 150 } \ 151 } while (/* CONSTCOND */0) 152 153 static int ecb_pool_initialized = 0; 154 static struct pool ecb_pool; 155 156 /* 157 * Names for the NCR53c9x variants, corresponding to the variant tags 158 * in ncr53c9xvar.h. 159 */ 160 static const char *ncr53c9x_variant_names[] = { 161 "ESP100", 162 "ESP100A", 163 "ESP200", 164 "NCR53C94", 165 "NCR53C96", 166 "ESP406", 167 "FAS408", 168 "FAS216", 169 "AM53C974", 170 "FAS366/HME", 171 "NCR53C90 (86C01)", 172 }; 173 174 /* 175 * Search linked list for LUN info by LUN id. 176 */ 177 static struct ncr53c9x_linfo * 178 ncr53c9x_lunsearch(struct ncr53c9x_tinfo *ti, int64_t lun) 179 { 180 struct ncr53c9x_linfo *li; 181 182 LIST_FOREACH(li, &ti->luns, link) 183 if (li->lun == lun) 184 return li; 185 return NULL; 186 } 187 188 /* 189 * Attach this instance, and then all the sub-devices 190 */ 191 void 192 ncr53c9x_attach(struct ncr53c9x_softc *sc) 193 { 194 struct scsipi_adapter *adapt = &sc->sc_adapter; 195 struct scsipi_channel *chan = &sc->sc_channel; 196 197 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_BIO); 198 199 callout_init(&sc->sc_watchdog, 0); 200 201 /* 202 * Note, the front-end has set us up to print the chip variation. 203 */ 204 if (sc->sc_rev >= NCR_VARIANT_MAX) { 205 aprint_error(": unknown variant %d, devices not attached\n", 206 sc->sc_rev); 207 return; 208 } 209 210 aprint_normal(": %s, %dMHz, SCSI ID %d\n", 211 ncr53c9x_variant_names[sc->sc_rev], sc->sc_freq, sc->sc_id); 212 213 sc->sc_ntarg = (sc->sc_rev == NCR_VARIANT_FAS366) ? 16 : 8; 214 215 /* 216 * Allocate SCSI message buffers. 217 * Front-ends can override allocation to avoid alignment 218 * handling in the DMA engines. Note that that ncr53c9x_msgout() 219 * can request a 1 byte DMA transfer. 220 */ 221 if (sc->sc_omess == NULL) 222 sc->sc_omess = malloc(NCR_MAX_MSG_LEN, M_DEVBUF, M_WAITOK); 223 224 if (sc->sc_imess == NULL) 225 sc->sc_imess = malloc(NCR_MAX_MSG_LEN + 1, M_DEVBUF, M_WAITOK); 226 227 sc->sc_tinfo = malloc(sc->sc_ntarg * sizeof(sc->sc_tinfo[0]), 228 M_DEVBUF, M_WAITOK | M_ZERO); 229 230 /* 231 * Treat NCR53C90 with the 86C01 DMA chip exactly as ESP100 232 * from now on. 233 */ 234 if (sc->sc_rev == NCR_VARIANT_NCR53C90_86C01) 235 sc->sc_rev = NCR_VARIANT_ESP100; 236 237 sc->sc_ccf = FREQTOCCF(sc->sc_freq); 238 239 /* The value *must not* be == 1. Make it 2 */ 240 if (sc->sc_ccf == 1) 241 sc->sc_ccf = 2; 242 243 /* 244 * The recommended timeout is 250ms. This register is loaded 245 * with a value calculated as follows, from the docs: 246 * 247 * (timeout period) x (CLK frequency) 248 * reg = ------------------------------------- 249 * 8192 x (Clock Conversion Factor) 250 * 251 * Since CCF has a linear relation to CLK, this generally computes 252 * to the constant of 153. 253 */ 254 sc->sc_timeout = ((250 * 1000) * sc->sc_freq) / (8192 * sc->sc_ccf); 255 256 /* CCF register only has 3 bits; 0 is actually 8 */ 257 sc->sc_ccf &= 7; 258 259 /* 260 * Fill in the scsipi_adapter. 261 */ 262 adapt->adapt_dev = sc->sc_dev; 263 adapt->adapt_nchannels = 1; 264 adapt->adapt_openings = 256; 265 adapt->adapt_max_periph = 256; 266 adapt->adapt_ioctl = ncr53c9x_ioctl; 267 /* adapt_request initialized by front-end */ 268 /* adapt_minphys initialized by front-end */ 269 270 /* 271 * Fill in the scsipi_channel. 272 */ 273 memset(chan, 0, sizeof(*chan)); 274 chan->chan_adapter = adapt; 275 chan->chan_bustype = &scsi_bustype; 276 chan->chan_channel = 0; 277 chan->chan_ntargets = sc->sc_ntarg; 278 chan->chan_nluns = 8; 279 chan->chan_id = sc->sc_id; 280 281 /* 282 * Add reference to adapter so that we drop the reference after 283 * config_found() to make sure the adapter is disabled. 284 */ 285 if (scsipi_adapter_addref(adapt) != 0) { 286 aprint_error_dev(sc->sc_dev, "unable to enable controller\n"); 287 return; 288 } 289 290 /* Reset state & bus */ 291 sc->sc_cfflags = device_cfdata(sc->sc_dev)->cf_flags; 292 sc->sc_state = 0; 293 ncr53c9x_init(sc, 0); /* no bus reset yet, leave that to scsibus* */ 294 295 /* 296 * Now try to attach all the sub-devices 297 */ 298 sc->sc_child = config_found(sc->sc_dev, &sc->sc_channel, scsiprint, 299 CFARGS_NONE); 300 301 scsipi_adapter_delref(adapt); 302 callout_reset(&sc->sc_watchdog, 60 * hz, ncr53c9x_watch, sc); 303 } 304 305 int 306 ncr53c9x_detach(struct ncr53c9x_softc *sc, int flags) 307 { 308 struct ncr53c9x_linfo *li, *nextli; 309 int t; 310 int error; 311 312 callout_stop(&sc->sc_watchdog); 313 314 if (sc->sc_tinfo) { 315 /* Cancel all commands. */ 316 ncr53c9x_clear(sc, XS_DRIVER_STUFFUP); 317 318 /* Free logical units. */ 319 for (t = 0; t < sc->sc_ntarg; t++) { 320 for (li = LIST_FIRST(&sc->sc_tinfo[t].luns); li; 321 li = nextli) { 322 nextli = LIST_NEXT(li, link); 323 free(li, M_DEVBUF); 324 } 325 } 326 } 327 328 if (sc->sc_child) { 329 error = config_detach(sc->sc_child, flags); 330 if (error) 331 return error; 332 } 333 334 if (sc->sc_imess) 335 free(sc->sc_imess, M_DEVBUF); 336 if (sc->sc_omess) 337 free(sc->sc_omess, M_DEVBUF); 338 339 mutex_destroy(&sc->sc_lock); 340 341 return 0; 342 } 343 344 /* 345 * This is the generic ncr53c9x reset function. It does not reset the SCSI bus, 346 * only this controller, but kills any on-going commands, and also stops 347 * and resets the DMA. 348 * 349 * After reset, registers are loaded with the defaults from the attach 350 * routine above. 351 */ 352 void 353 ncr53c9x_reset(struct ncr53c9x_softc *sc) 354 { 355 356 /* reset DMA first */ 357 NCRDMA_RESET(sc); 358 359 /* reset SCSI chip */ 360 NCRCMD(sc, NCRCMD_RSTCHIP); 361 NCRCMD(sc, NCRCMD_NOP); 362 DELAY(500); 363 364 /* do these backwards, and fall through */ 365 switch (sc->sc_rev) { 366 case NCR_VARIANT_ESP406: 367 case NCR_VARIANT_FAS408: 368 NCR_WRITE_REG(sc, NCR_CFG5, sc->sc_cfg5 | NCRCFG5_SINT); 369 NCR_WRITE_REG(sc, NCR_CFG4, sc->sc_cfg4); 370 /* FALLTHROUGH */ 371 case NCR_VARIANT_AM53C974: 372 case NCR_VARIANT_FAS216: 373 case NCR_VARIANT_NCR53C94: 374 case NCR_VARIANT_NCR53C96: 375 case NCR_VARIANT_ESP200: 376 sc->sc_features |= NCR_F_HASCFG3; 377 NCR_WRITE_REG(sc, NCR_CFG3, sc->sc_cfg3); 378 /* FALLTHROUGH */ 379 case NCR_VARIANT_ESP100A: 380 sc->sc_features |= NCR_F_SELATN3; 381 NCR_WRITE_REG(sc, NCR_CFG2, sc->sc_cfg2); 382 /* FALLTHROUGH */ 383 case NCR_VARIANT_ESP100: 384 NCR_WRITE_REG(sc, NCR_CFG1, sc->sc_cfg1); 385 NCR_WRITE_REG(sc, NCR_CCF, sc->sc_ccf); 386 NCR_WRITE_REG(sc, NCR_SYNCOFF, 0); 387 NCR_WRITE_REG(sc, NCR_TIMEOUT, sc->sc_timeout); 388 break; 389 390 case NCR_VARIANT_FAS366: 391 sc->sc_features |= 392 NCR_F_HASCFG3 | NCR_F_FASTSCSI | NCR_F_SELATN3; 393 sc->sc_cfg3 = NCRFASCFG3_FASTCLK | NCRFASCFG3_OBAUTO; 394 sc->sc_cfg3_fscsi = NCRFASCFG3_FASTSCSI; 395 NCR_WRITE_REG(sc, NCR_CFG3, sc->sc_cfg3); 396 sc->sc_cfg2 = 0; /* NCRCFG2_HMEFE| NCRCFG2_HME32 */ 397 NCR_WRITE_REG(sc, NCR_CFG2, sc->sc_cfg2); 398 NCR_WRITE_REG(sc, NCR_CFG1, sc->sc_cfg1); 399 NCR_WRITE_REG(sc, NCR_CCF, sc->sc_ccf); 400 NCR_WRITE_REG(sc, NCR_SYNCOFF, 0); 401 NCR_WRITE_REG(sc, NCR_TIMEOUT, sc->sc_timeout); 402 break; 403 404 default: 405 printf("%s: unknown revision code, assuming ESP100\n", 406 device_xname(sc->sc_dev)); 407 NCR_WRITE_REG(sc, NCR_CFG1, sc->sc_cfg1); 408 NCR_WRITE_REG(sc, NCR_CCF, sc->sc_ccf); 409 NCR_WRITE_REG(sc, NCR_SYNCOFF, 0); 410 NCR_WRITE_REG(sc, NCR_TIMEOUT, sc->sc_timeout); 411 } 412 413 if (sc->sc_rev == NCR_VARIANT_AM53C974) 414 NCR_WRITE_REG(sc, NCR_AMDCFG4, sc->sc_cfg4); 415 416 #if 0 417 printf("%s: ncr53c9x_reset: revision %d\n", 418 device_xname(sc->sc_dev), sc->sc_rev); 419 printf("%s: ncr53c9x_reset: cfg1 0x%x, cfg2 0x%x, cfg3 0x%x, " 420 "ccf 0x%x, timeout 0x%x\n", 421 device_xname(sc->sc_dev), sc->sc_cfg1, sc->sc_cfg2, sc->sc_cfg3, 422 sc->sc_ccf, sc->sc_timeout); 423 #endif 424 } 425 426 #if 0 427 /* 428 * Reset the SCSI bus, but not the chip 429 */ 430 void 431 ncr53c9x_scsi_reset(struct ncr53c9x_softc *sc) 432 { 433 434 (*sc->sc_glue->gl_dma_stop)(sc); 435 436 printf("%s: resetting SCSI bus\n", device_xname(sc->sc_dev)); 437 NCRCMD(sc, NCRCMD_RSTSCSI); 438 } 439 #endif 440 441 /* 442 * Clear all commands 443 */ 444 void 445 ncr53c9x_clear(struct ncr53c9x_softc *sc, scsipi_xfer_result_t result) 446 { 447 struct ncr53c9x_ecb *ecb; 448 struct ncr53c9x_linfo *li; 449 int i, r; 450 451 /* Cancel any active commands. */ 452 sc->sc_state = NCR_CLEANING; 453 sc->sc_msgify = 0; 454 ecb = sc->sc_nexus; 455 if (ecb != NULL) { 456 ecb->xs->error = result; 457 ncr53c9x_done(sc, ecb); 458 } 459 /* Cancel outstanding disconnected commands on each LUN */ 460 for (r = 0; r < sc->sc_ntarg; r++) { 461 LIST_FOREACH(li, &sc->sc_tinfo[r].luns, link) { 462 ecb = li->untagged; 463 if (ecb != NULL) { 464 li->untagged = NULL; 465 /* 466 * XXXXXXX 467 * 468 * Should we terminate a command 469 * that never reached the disk? 470 */ 471 li->busy = 0; 472 ecb->xs->error = result; 473 ncr53c9x_done(sc, ecb); 474 } 475 for (i = 0; i < 256; i++) { 476 ecb = li->queued[i]; 477 if (ecb != NULL) { 478 li->queued[i] = NULL; 479 ecb->xs->error = result; 480 ncr53c9x_done(sc, ecb); 481 } 482 } 483 li->used = 0; 484 } 485 } 486 } 487 488 /* 489 * Initialize ncr53c9x state machine 490 */ 491 void 492 ncr53c9x_init(struct ncr53c9x_softc *sc, int doreset) 493 { 494 int r; 495 496 NCR_MISC(("[NCR_INIT(%d) %d] ", doreset, sc->sc_state)); 497 498 if (!ecb_pool_initialized) { 499 /* All instances share this pool */ 500 pool_init(&ecb_pool, sizeof(struct ncr53c9x_ecb), 0, 0, 0, 501 "ncr53c9x_ecb", NULL, IPL_BIO); 502 /* make sure to always have some items to play with */ 503 pool_prime(&ecb_pool, 1); 504 ecb_pool_initialized = 1; 505 } 506 507 if (sc->sc_state == 0) { 508 /* First time through; initialize. */ 509 510 TAILQ_INIT(&sc->ready_list); 511 sc->sc_nexus = NULL; 512 memset(sc->sc_tinfo, 0, sizeof(*sc->sc_tinfo)); 513 for (r = 0; r < sc->sc_ntarg; r++) { 514 LIST_INIT(&sc->sc_tinfo[r].luns); 515 } 516 } else { 517 ncr53c9x_clear(sc, XS_TIMEOUT); 518 } 519 520 /* 521 * reset the chip to a known state 522 */ 523 ncr53c9x_reset(sc); 524 525 sc->sc_flags = 0; 526 sc->sc_msgpriq = sc->sc_msgout = sc->sc_msgoutq = 0; 527 sc->sc_phase = sc->sc_prevphase = INVALID_PHASE; 528 529 /* XXXSMP scsipi */ 530 KERNEL_LOCK(1, curlwp); 531 532 for (r = 0; r < sc->sc_ntarg; r++) { 533 struct ncr53c9x_tinfo *ti = &sc->sc_tinfo[r]; 534 /* XXX - config flags per target: low bits: no reselect; high bits: no synch */ 535 536 ti->flags = ((sc->sc_minsync && 537 !(sc->sc_cfflags & (1 << ((r & 7) + 8)))) ? 538 0 : T_SYNCHOFF) | 539 ((sc->sc_cfflags & (1 << (r & 7))) ? T_RSELECTOFF : 0); 540 #ifdef DEBUG 541 if (ncr53c9x_notag) 542 ti->flags &= ~T_TAG; 543 #endif 544 ti->period = sc->sc_minsync; 545 ti->offset = 0; 546 ti->cfg3 = 0; 547 548 ncr53c9x_update_xfer_mode(sc, r); 549 } 550 551 if (doreset) { 552 sc->sc_state = NCR_SBR; 553 NCRCMD(sc, NCRCMD_RSTSCSI); 554 555 /* Notify upper layer */ 556 scsipi_async_event(&sc->sc_channel, ASYNC_EVENT_RESET, NULL); 557 } else { 558 sc->sc_state = NCR_IDLE; 559 ncr53c9x_sched(sc); 560 } 561 562 /* XXXSMP scsipi */ 563 KERNEL_UNLOCK_ONE(curlwp); 564 } 565 566 /* 567 * Read the NCR registers, and save their contents for later use. 568 * NCR_STAT, NCR_STEP & NCR_INTR are mostly zeroed out when reading 569 * NCR_INTR - so make sure it is the last read. 570 * 571 * I think that (from reading the docs) most bits in these registers 572 * only make sense when he DMA CSR has an interrupt showing. Call only 573 * if an interrupt is pending. 574 */ 575 inline void 576 ncr53c9x_readregs(struct ncr53c9x_softc *sc) 577 { 578 579 sc->sc_espstat = NCR_READ_REG(sc, NCR_STAT); 580 /* Only the stepo bits are of interest */ 581 sc->sc_espstep = NCR_READ_REG(sc, NCR_STEP) & NCRSTEP_MASK; 582 583 if (sc->sc_rev == NCR_VARIANT_FAS366) 584 sc->sc_espstat2 = NCR_READ_REG(sc, NCR_STAT2); 585 586 sc->sc_espintr = NCR_READ_REG(sc, NCR_INTR); 587 588 if (sc->sc_glue->gl_clear_latched_intr != NULL) 589 (*sc->sc_glue->gl_clear_latched_intr)(sc); 590 591 /* 592 * Determine the SCSI bus phase, return either a real SCSI bus phase 593 * or some pseudo phase we use to detect certain exceptions. 594 */ 595 596 sc->sc_phase = (sc->sc_espintr & NCRINTR_DIS) ? 597 /* Disconnected */ BUSFREE_PHASE : sc->sc_espstat & NCRSTAT_PHASE; 598 599 NCR_INTS(("regs[intr=%02x,stat=%02x,step=%02x,stat2=%02x] ", 600 sc->sc_espintr, sc->sc_espstat, sc->sc_espstep, sc->sc_espstat2)); 601 } 602 603 /* 604 * Convert Synchronous Transfer Period to chip register Clock Per Byte value. 605 */ 606 static inline int 607 ncr53c9x_stp2cpb(struct ncr53c9x_softc *sc, int period) 608 { 609 int v; 610 611 v = (sc->sc_freq * period) / 250; 612 if (ncr53c9x_cpb2stp(sc, v) < period) 613 /* Correct round-down error */ 614 v++; 615 return v; 616 } 617 618 static inline void 619 ncr53c9x_setsync(struct ncr53c9x_softc *sc, struct ncr53c9x_tinfo *ti) 620 { 621 uint8_t syncoff, synctp; 622 uint8_t cfg3 = sc->sc_cfg3 | ti->cfg3; 623 624 if (ti->flags & T_SYNCMODE) { 625 syncoff = ti->offset; 626 synctp = ncr53c9x_stp2cpb(sc, ti->period); 627 if (sc->sc_features & NCR_F_FASTSCSI) { 628 /* 629 * If the period is 200ns or less (ti->period <= 50), 630 * put the chip in Fast SCSI mode. 631 */ 632 if (ti->period <= 50) 633 /* 634 * There are (at least) 4 variations of the 635 * configuration 3 register. The drive attach 636 * routine sets the appropriate bit to put the 637 * chip into Fast SCSI mode so that it doesn't 638 * have to be figured out here each time. 639 */ 640 cfg3 |= sc->sc_cfg3_fscsi; 641 } 642 643 /* 644 * Am53c974 requires different SYNCTP values when the 645 * FSCSI bit is off. 646 */ 647 if (sc->sc_rev == NCR_VARIANT_AM53C974 && 648 (cfg3 & NCRAMDCFG3_FSCSI) == 0) 649 synctp--; 650 } else { 651 syncoff = 0; 652 synctp = 0; 653 } 654 655 if (sc->sc_features & NCR_F_HASCFG3) 656 NCR_WRITE_REG(sc, NCR_CFG3, cfg3); 657 658 NCR_WRITE_REG(sc, NCR_SYNCOFF, syncoff); 659 NCR_WRITE_REG(sc, NCR_SYNCTP, synctp); 660 } 661 662 /* 663 * Send a command to a target, set the driver state to NCR_SELECTING 664 * and let the caller take care of the rest. 665 * 666 * Keeping this as a function allows me to say that this may be done 667 * by DMA instead of programmed I/O soon. 668 */ 669 void 670 ncr53c9x_select(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb) 671 { 672 struct scsipi_periph *periph = ecb->xs->xs_periph; 673 int target = periph->periph_target; 674 int lun = periph->periph_lun; 675 struct ncr53c9x_tinfo *ti = &sc->sc_tinfo[target]; 676 int tiflags = ti->flags; 677 uint8_t *cmd; 678 int clen; 679 bool selatn3, selatns; 680 size_t dmasize; 681 682 NCR_TRACE(("[ncr53c9x_select(t%d,l%d,cmd:%x,tag:%x,%x)] ", 683 target, lun, ecb->cmd.cmd.opcode, ecb->tag[0], ecb->tag[1])); 684 685 sc->sc_state = NCR_SELECTING; 686 /* 687 * Schedule the timeout now, the first time we will go away 688 * expecting to come back due to an interrupt, because it is 689 * always possible that the interrupt may never happen. 690 */ 691 if ((ecb->xs->xs_control & XS_CTL_POLL) == 0) { 692 callout_reset(&ecb->xs->xs_callout, mstohz(ecb->timeout), 693 ncr53c9x_timeout, ecb); 694 } 695 696 /* 697 * The docs say the target register is never reset, and I 698 * can't think of a better place to set it 699 */ 700 if (sc->sc_rev == NCR_VARIANT_FAS366) { 701 NCRCMD(sc, NCRCMD_FLUSH); 702 NCR_WRITE_REG(sc, NCR_SELID, target | NCR_BUSID_HME); 703 } else { 704 NCR_WRITE_REG(sc, NCR_SELID, target); 705 } 706 ncr53c9x_setsync(sc, ti); 707 708 if ((ecb->flags & ECB_SENSE) != 0) { 709 /* 710 * For REQUEST SENSE, we should not send an IDENTIFY or 711 * otherwise mangle the target. There should be no MESSAGE IN 712 * phase. 713 */ 714 if (sc->sc_features & NCR_F_DMASELECT) { 715 /* setup DMA transfer for command */ 716 dmasize = clen = ecb->clen; 717 sc->sc_cmdlen = clen; 718 sc->sc_cmdp = (void *)&ecb->cmd.cmd; 719 720 NCRDMA_SETUP(sc, &sc->sc_cmdp, &sc->sc_cmdlen, 0, 721 &dmasize); 722 /* Program the SCSI counter */ 723 NCR_SET_COUNT(sc, dmasize); 724 725 if (sc->sc_rev != NCR_VARIANT_FAS366) 726 NCRCMD(sc, NCRCMD_NOP | NCRCMD_DMA); 727 728 /* And get the targets attention */ 729 NCRCMD(sc, NCRCMD_SELNATN | NCRCMD_DMA); 730 NCRDMA_GO(sc); 731 } else { 732 ncr53c9x_wrfifo(sc, (uint8_t *)&ecb->cmd.cmd, 733 ecb->clen); 734 sc->sc_cmdlen = 0; 735 NCRCMD(sc, NCRCMD_SELNATN); 736 } 737 return; 738 } 739 740 selatn3 = selatns = false; 741 if (ecb->tag[0] != 0) { 742 if (sc->sc_features & NCR_F_SELATN3) 743 /* use SELATN3 to send tag messages */ 744 selatn3 = true; 745 else 746 /* We don't have SELATN3; use SELATNS to send tags */ 747 selatns = true; 748 } 749 750 if (ti->flags & T_NEGOTIATE) { 751 /* We have to use SELATNS to send sync/wide messages */ 752 selatn3 = false; 753 selatns = true; 754 } 755 756 cmd = (uint8_t *)&ecb->cmd.cmd; 757 758 if (selatn3) { 759 /* We'll use tags with SELATN3 */ 760 clen = ecb->clen + 3; 761 cmd -= 3; 762 cmd[0] = MSG_IDENTIFY(lun, 1); /* msg[0] */ 763 cmd[1] = ecb->tag[0]; /* msg[1] */ 764 cmd[2] = ecb->tag[1]; /* msg[2] */ 765 } else { 766 /* We don't have tags, or will send messages with SELATNS */ 767 clen = ecb->clen + 1; 768 cmd -= 1; 769 cmd[0] = MSG_IDENTIFY(lun, (tiflags & T_RSELECTOFF) == 0); 770 } 771 772 if ((sc->sc_features & NCR_F_DMASELECT) && !selatns) { 773 774 /* setup DMA transfer for command */ 775 dmasize = clen; 776 sc->sc_cmdlen = clen; 777 sc->sc_cmdp = cmd; 778 779 NCRDMA_SETUP(sc, &sc->sc_cmdp, &sc->sc_cmdlen, 0, &dmasize); 780 /* Program the SCSI counter */ 781 NCR_SET_COUNT(sc, dmasize); 782 783 /* load the count in */ 784 /* if (sc->sc_rev != NCR_VARIANT_FAS366) */ 785 NCRCMD(sc, NCRCMD_NOP | NCRCMD_DMA); 786 787 /* And get the targets attention */ 788 if (selatn3) { 789 sc->sc_msgout = SEND_TAG; 790 sc->sc_flags |= NCR_ATN; 791 NCRCMD(sc, NCRCMD_SELATN3 | NCRCMD_DMA); 792 } else 793 NCRCMD(sc, NCRCMD_SELATN | NCRCMD_DMA); 794 NCRDMA_GO(sc); 795 return; 796 } 797 798 /* 799 * Who am I. This is where we tell the target that we are 800 * happy for it to disconnect etc. 801 */ 802 803 /* Now get the command into the FIFO */ 804 sc->sc_cmdlen = 0; 805 ncr53c9x_wrfifo(sc, cmd, clen); 806 807 /* And get the targets attention */ 808 if (selatns) { 809 NCR_MSGS(("SELATNS \n")); 810 /* Arbitrate, select and stop after IDENTIFY message */ 811 NCRCMD(sc, NCRCMD_SELATNS); 812 } else if (selatn3) { 813 sc->sc_msgout = SEND_TAG; 814 sc->sc_flags |= NCR_ATN; 815 NCRCMD(sc, NCRCMD_SELATN3); 816 } else 817 NCRCMD(sc, NCRCMD_SELATN); 818 } 819 820 void 821 ncr53c9x_free_ecb(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb) 822 { 823 int s; 824 825 s = splbio(); 826 ecb->flags = 0; 827 pool_put(&ecb_pool, (void *)ecb); 828 splx(s); 829 return; 830 } 831 832 struct ncr53c9x_ecb * 833 ncr53c9x_get_ecb(struct ncr53c9x_softc *sc, int flags) 834 { 835 struct ncr53c9x_ecb *ecb; 836 int s; 837 838 s = splbio(); 839 ecb = pool_get(&ecb_pool, PR_NOWAIT | PR_ZERO); 840 if (ecb) 841 ecb->flags |= ECB_ALLOC; 842 splx(s); 843 return ecb; 844 } 845 846 /* 847 * DRIVER FUNCTIONS CALLABLE FROM HIGHER LEVEL DRIVERS 848 */ 849 850 /* 851 * Start a SCSI-command 852 * This function is called by the higher level SCSI-driver to queue/run 853 * SCSI-commands. 854 */ 855 856 void 857 ncr53c9x_scsipi_request(struct scsipi_channel *chan, scsipi_adapter_req_t req, 858 void *arg) 859 { 860 struct scsipi_xfer *xs; 861 struct scsipi_periph *periph; 862 struct ncr53c9x_softc *sc; 863 struct ncr53c9x_ecb *ecb; 864 int flags; 865 866 NCR_TRACE(("[ncr53c9x_scsipi_request] ")); 867 868 sc = device_private(chan->chan_adapter->adapt_dev); 869 mutex_enter(&sc->sc_lock); 870 871 switch (req) { 872 case ADAPTER_REQ_RUN_XFER: 873 xs = arg; 874 periph = xs->xs_periph; 875 flags = xs->xs_control; 876 877 NCR_CMDS(("[0x%x, %d]->%d ", (int)xs->cmd->opcode, xs->cmdlen, 878 periph->periph_target)); 879 880 /* Get an ECB to use. */ 881 ecb = ncr53c9x_get_ecb(sc, xs->xs_control); 882 /* 883 * This should never happen as we track resources 884 * in the mid-layer, but for now it can as pool_get() 885 * can fail. 886 */ 887 if (ecb == NULL) { 888 scsipi_printaddr(periph); 889 printf("%s: unable to allocate ecb\n", 890 device_xname(sc->sc_dev)); 891 xs->error = XS_RESOURCE_SHORTAGE; 892 mutex_exit(&sc->sc_lock); 893 scsipi_done(xs); 894 return; 895 } 896 897 /* Initialize ecb */ 898 ecb->xs = xs; 899 ecb->timeout = xs->timeout; 900 901 if (flags & XS_CTL_RESET) { 902 ecb->flags |= ECB_RESET; 903 ecb->clen = 0; 904 ecb->dleft = 0; 905 } else { 906 memcpy(&ecb->cmd.cmd, xs->cmd, xs->cmdlen); 907 ecb->clen = xs->cmdlen; 908 ecb->daddr = xs->data; 909 ecb->dleft = xs->datalen; 910 } 911 ecb->stat = 0; 912 913 TAILQ_INSERT_TAIL(&sc->ready_list, ecb, chain); 914 ecb->flags |= ECB_READY; 915 if (sc->sc_state == NCR_IDLE) 916 ncr53c9x_sched(sc); 917 918 if ((flags & XS_CTL_POLL) == 0) 919 break; 920 921 /* Not allowed to use interrupts, use polling instead */ 922 if (ncr53c9x_poll(sc, xs, ecb->timeout)) { 923 ncr53c9x_timeout(ecb); 924 if (ncr53c9x_poll(sc, xs, ecb->timeout)) 925 ncr53c9x_timeout(ecb); 926 } 927 break; 928 929 case ADAPTER_REQ_GROW_RESOURCES: 930 /* XXX Not supported. */ 931 break; 932 933 case ADAPTER_REQ_SET_XFER_MODE: 934 { 935 struct ncr53c9x_tinfo *ti; 936 struct scsipi_xfer_mode *xm = arg; 937 938 ti = &sc->sc_tinfo[xm->xm_target]; 939 ti->flags &= ~(T_NEGOTIATE|T_SYNCMODE); 940 ti->period = 0; 941 ti->offset = 0; 942 943 if ((sc->sc_cfflags & (1 << ((xm->xm_target & 7) + 16))) == 0 && 944 (xm->xm_mode & PERIPH_CAP_TQING)) { 945 NCR_MISC(("%s: target %d: tagged queuing\n", 946 device_xname(sc->sc_dev), xm->xm_target)); 947 ti->flags |= T_TAG; 948 } else 949 ti->flags &= ~T_TAG; 950 951 if ((xm->xm_mode & PERIPH_CAP_WIDE16) != 0) { 952 NCR_MISC(("%s: target %d: wide scsi negotiation\n", 953 device_xname(sc->sc_dev), xm->xm_target)); 954 if (sc->sc_rev == NCR_VARIANT_FAS366) { 955 ti->flags |= T_WIDE; 956 ti->width = 1; 957 } 958 } 959 960 if ((xm->xm_mode & PERIPH_CAP_SYNC) != 0 && 961 (ti->flags & T_SYNCHOFF) == 0 && sc->sc_minsync != 0) { 962 NCR_MISC(("%s: target %d: sync negotiation\n", 963 device_xname(sc->sc_dev), xm->xm_target)); 964 ti->flags |= T_NEGOTIATE; 965 ti->period = sc->sc_minsync; 966 } 967 /* 968 * If we're not going to negotiate, send the notification 969 * now, since it won't happen later. 970 */ 971 if ((ti->flags & T_NEGOTIATE) == 0) 972 ncr53c9x_update_xfer_mode(sc, xm->xm_target); 973 } 974 break; 975 } 976 977 mutex_exit(&sc->sc_lock); 978 } 979 980 void 981 ncr53c9x_update_xfer_mode(struct ncr53c9x_softc *sc, int target) 982 { 983 struct scsipi_xfer_mode xm; 984 struct ncr53c9x_tinfo *ti = &sc->sc_tinfo[target]; 985 986 xm.xm_target = target; 987 xm.xm_mode = 0; 988 xm.xm_period = 0; 989 xm.xm_offset = 0; 990 991 if (ti->flags & T_SYNCMODE) { 992 xm.xm_mode |= PERIPH_CAP_SYNC; 993 xm.xm_period = ti->period; 994 xm.xm_offset = ti->offset; 995 } 996 if (ti->width) 997 xm.xm_mode |= PERIPH_CAP_WIDE16; 998 999 if ((ti->flags & (T_RSELECTOFF|T_TAG)) == T_TAG) 1000 xm.xm_mode |= PERIPH_CAP_TQING; 1001 1002 scsipi_async_event(&sc->sc_channel, ASYNC_EVENT_XFER_MODE, &xm); 1003 } 1004 1005 /* 1006 * Used when interrupt driven I/O isn't allowed, e.g. during boot. 1007 */ 1008 int 1009 ncr53c9x_poll(struct ncr53c9x_softc *sc, struct scsipi_xfer *xs, int count) 1010 { 1011 1012 NCR_TRACE(("[ncr53c9x_poll] ")); 1013 while (count) { 1014 if (NCRDMA_ISINTR(sc)) { 1015 mutex_exit(&sc->sc_lock); 1016 ncr53c9x_intr(sc); 1017 mutex_enter(&sc->sc_lock); 1018 } 1019 #if alternatively 1020 if (NCR_READ_REG(sc, NCR_STAT) & NCRSTAT_INT) 1021 ncr53c9x_intr(sc); 1022 #endif 1023 if ((xs->xs_status & XS_STS_DONE) != 0) 1024 return 0; 1025 if (sc->sc_state == NCR_IDLE) { 1026 NCR_TRACE(("[ncr53c9x_poll: rescheduling] ")); 1027 ncr53c9x_sched(sc); 1028 } 1029 DELAY(1000); 1030 count--; 1031 } 1032 return 1; 1033 } 1034 1035 int 1036 ncr53c9x_ioctl(struct scsipi_channel *chan, u_long cmd, void *arg, 1037 int flag, struct proc *p) 1038 { 1039 struct ncr53c9x_softc *sc; 1040 int error = 0; 1041 1042 sc = device_private(chan->chan_adapter->adapt_dev); 1043 switch (cmd) { 1044 case SCBUSIORESET: 1045 mutex_enter(&sc->sc_lock); 1046 ncr53c9x_init(sc, 1); 1047 mutex_exit(&sc->sc_lock); 1048 break; 1049 default: 1050 error = ENOTTY; 1051 break; 1052 } 1053 return error; 1054 } 1055 1056 1057 /* 1058 * LOW LEVEL SCSI UTILITIES 1059 */ 1060 1061 /* 1062 * Schedule a scsi operation. This has now been pulled out of the interrupt 1063 * handler so that we may call it from ncr53c9x_scsipi_request and 1064 * ncr53c9x_done. This may save us an unnecessary interrupt just to get 1065 * things going. Should only be called when state == NCR_IDLE and at bio pl. 1066 */ 1067 void 1068 ncr53c9x_sched(struct ncr53c9x_softc *sc) 1069 { 1070 struct ncr53c9x_ecb *ecb; 1071 struct scsipi_periph *periph; 1072 struct ncr53c9x_tinfo *ti; 1073 struct ncr53c9x_linfo *li; 1074 int lun; 1075 int tag; 1076 1077 NCR_TRACE(("[ncr53c9x_sched] ")); 1078 if (sc->sc_state != NCR_IDLE) 1079 panic("%s: not IDLE (state=%d)", __func__, sc->sc_state); 1080 1081 /* 1082 * Find first ecb in ready queue that is for a target/lunit 1083 * combinations that is not busy. 1084 */ 1085 for (ecb = TAILQ_FIRST(&sc->ready_list); ecb != NULL; 1086 ecb = TAILQ_NEXT(ecb, chain)) { 1087 periph = ecb->xs->xs_periph; 1088 ti = &sc->sc_tinfo[periph->periph_target]; 1089 lun = periph->periph_lun; 1090 1091 /* Select type of tag for this command */ 1092 if ((ti->flags & T_RSELECTOFF) != 0) 1093 tag = 0; 1094 else if ((ti->flags & T_TAG) == 0) 1095 tag = 0; 1096 else if ((ecb->flags & ECB_SENSE) != 0) 1097 tag = 0; 1098 else 1099 tag = ecb->xs->xs_tag_type; 1100 #if 0 1101 /* XXXX Use tags for polled commands? */ 1102 if (ecb->xs->xs_control & XS_CTL_POLL) 1103 tag = 0; 1104 #endif 1105 1106 li = TINFO_LUN(ti, lun); 1107 if (li == NULL) { 1108 /* Initialize LUN info and add to list. */ 1109 li = malloc(sizeof(*li), M_DEVBUF, M_NOWAIT|M_ZERO); 1110 if (li == NULL) { 1111 continue; 1112 } 1113 li->lun = lun; 1114 1115 LIST_INSERT_HEAD(&ti->luns, li, link); 1116 if (lun < NCR_NLUN) 1117 ti->lun[lun] = li; 1118 } 1119 li->last_used = time_second; 1120 if (tag == 0) { 1121 /* Try to issue this as an un-tagged command */ 1122 if (li->untagged == NULL) 1123 li->untagged = ecb; 1124 } 1125 if (li->untagged != NULL) { 1126 tag = 0; 1127 if ((li->busy != 1) && li->used == 0) { 1128 /* We need to issue this untagged command now */ 1129 ecb = li->untagged; 1130 periph = ecb->xs->xs_periph; 1131 } else { 1132 /* Not ready yet */ 1133 continue; 1134 } 1135 } 1136 ecb->tag[0] = tag; 1137 if (tag != 0) { 1138 li->queued[ecb->xs->xs_tag_id] = ecb; 1139 ecb->tag[1] = ecb->xs->xs_tag_id; 1140 li->used++; 1141 } 1142 if (li->untagged != NULL && (li->busy != 1)) { 1143 li->busy = 1; 1144 TAILQ_REMOVE(&sc->ready_list, ecb, chain); 1145 ecb->flags &= ~ECB_READY; 1146 sc->sc_nexus = ecb; 1147 ncr53c9x_select(sc, ecb); 1148 break; 1149 } 1150 if (li->untagged == NULL && tag != 0) { 1151 TAILQ_REMOVE(&sc->ready_list, ecb, chain); 1152 ecb->flags &= ~ECB_READY; 1153 sc->sc_nexus = ecb; 1154 ncr53c9x_select(sc, ecb); 1155 break; 1156 } else { 1157 NCR_TRACE(("%d:%d busy\n", 1158 periph->periph_target, 1159 periph->periph_lun)); 1160 } 1161 } 1162 } 1163 1164 void 1165 ncr53c9x_sense(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb) 1166 { 1167 struct scsipi_xfer *xs = ecb->xs; 1168 struct scsipi_periph *periph = xs->xs_periph; 1169 struct ncr53c9x_tinfo *ti = &sc->sc_tinfo[periph->periph_target]; 1170 struct scsi_request_sense *ss = (void *)&ecb->cmd.cmd; 1171 struct ncr53c9x_linfo *li; 1172 int lun = periph->periph_lun; 1173 1174 NCR_TRACE(("requesting sense ")); 1175 /* Next, setup a request sense command block */ 1176 memset(ss, 0, sizeof(*ss)); 1177 ss->opcode = SCSI_REQUEST_SENSE; 1178 ss->byte2 = periph->periph_lun << SCSI_CMD_LUN_SHIFT; 1179 ss->length = sizeof(struct scsi_sense_data); 1180 ecb->clen = sizeof(*ss); 1181 ecb->daddr = (uint8_t *)&xs->sense.scsi_sense; 1182 ecb->dleft = sizeof(struct scsi_sense_data); 1183 ecb->flags |= ECB_SENSE; 1184 ecb->timeout = NCR_SENSE_TIMEOUT; 1185 ti->senses++; 1186 li = TINFO_LUN(ti, lun); 1187 if (li->busy) 1188 li->busy = 0; 1189 ncr53c9x_dequeue(sc, ecb); 1190 li->untagged = ecb; /* must be executed first to fix C/A */ 1191 li->busy = 2; 1192 if (ecb == sc->sc_nexus) { 1193 ncr53c9x_select(sc, ecb); 1194 } else { 1195 TAILQ_INSERT_HEAD(&sc->ready_list, ecb, chain); 1196 ecb->flags |= ECB_READY; 1197 if (sc->sc_state == NCR_IDLE) 1198 ncr53c9x_sched(sc); 1199 } 1200 } 1201 1202 /* 1203 * POST PROCESSING OF SCSI_CMD (usually current) 1204 */ 1205 void 1206 ncr53c9x_done(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb) 1207 { 1208 struct scsipi_xfer *xs = ecb->xs; 1209 struct scsipi_periph *periph = xs->xs_periph; 1210 struct ncr53c9x_tinfo *ti = &sc->sc_tinfo[periph->periph_target]; 1211 int lun = periph->periph_lun; 1212 struct ncr53c9x_linfo *li = TINFO_LUN(ti, lun); 1213 1214 NCR_TRACE(("[ncr53c9x_done(error:%x)] ", xs->error)); 1215 1216 if ((xs->xs_control & XS_CTL_POLL) == 0) 1217 callout_stop(&xs->xs_callout); 1218 1219 /* 1220 * Now, if we've come here with no error code, i.e. we've kept the 1221 * initial XS_NOERROR, and the status code signals that we should 1222 * check sense, we'll need to set up a request sense cmd block and 1223 * push the command back into the ready queue *before* any other 1224 * commands for this target/lunit, else we lose the sense info. 1225 * We don't support chk sense conditions for the request sense cmd. 1226 */ 1227 if (xs->error == XS_NOERROR) { 1228 xs->status = ecb->stat; 1229 if ((ecb->flags & ECB_ABORT) != 0) { 1230 xs->error = XS_TIMEOUT; 1231 } else if ((ecb->flags & ECB_SENSE) != 0) { 1232 xs->error = XS_SENSE; 1233 } else if ((ecb->stat & ST_MASK) == SCSI_CHECK) { 1234 /* First, save the return values */ 1235 xs->resid = ecb->dleft; 1236 ncr53c9x_sense(sc, ecb); 1237 return; 1238 } else { 1239 xs->resid = ecb->dleft; 1240 } 1241 if (xs->status == SCSI_QUEUE_FULL || xs->status == XS_BUSY) 1242 xs->error = XS_BUSY; 1243 } 1244 1245 #ifdef NCR53C9X_DEBUG 1246 if (ncr53c9x_debug & NCR_SHOWTRAC) { 1247 if (xs->resid != 0) 1248 printf("resid=%d ", xs->resid); 1249 if (xs->error == XS_SENSE) 1250 printf("sense=0x%02x\n", 1251 xs->sense.scsi_sense.response_code); 1252 else 1253 printf("error=%d\n", xs->error); 1254 } 1255 #endif 1256 1257 /* 1258 * Remove the ECB from whatever queue it's on. 1259 */ 1260 ncr53c9x_dequeue(sc, ecb); 1261 if (ecb == sc->sc_nexus) { 1262 sc->sc_nexus = NULL; 1263 if (sc->sc_state != NCR_CLEANING) { 1264 sc->sc_state = NCR_IDLE; 1265 ncr53c9x_sched(sc); 1266 } 1267 } 1268 1269 if (xs->error == XS_SELTIMEOUT) { 1270 /* Selection timeout -- discard this LUN if empty */ 1271 if (li->untagged == NULL && li->used == 0) { 1272 if (lun < NCR_NLUN) 1273 ti->lun[lun] = NULL; 1274 LIST_REMOVE(li, link); 1275 free(li, M_DEVBUF); 1276 } 1277 } 1278 1279 ncr53c9x_free_ecb(sc, ecb); 1280 ti->cmds++; 1281 mutex_exit(&sc->sc_lock); 1282 scsipi_done(xs); 1283 mutex_enter(&sc->sc_lock); 1284 } 1285 1286 void 1287 ncr53c9x_dequeue(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb) 1288 { 1289 struct ncr53c9x_tinfo *ti = 1290 &sc->sc_tinfo[ecb->xs->xs_periph->periph_target]; 1291 struct ncr53c9x_linfo *li; 1292 int64_t lun = ecb->xs->xs_periph->periph_lun; 1293 1294 li = TINFO_LUN(ti, lun); 1295 #ifdef DIAGNOSTIC 1296 if (li == NULL || li->lun != lun) 1297 panic("%s: lun %" PRIx64 " for ecb %p does not exist", 1298 __func__, lun, ecb); 1299 #endif 1300 if (li->untagged == ecb) { 1301 li->busy = 0; 1302 li->untagged = NULL; 1303 } 1304 if (ecb->tag[0] && li->queued[ecb->tag[1]] != NULL) { 1305 #ifdef DIAGNOSTIC 1306 if (li->queued[ecb->tag[1]] != NULL && 1307 (li->queued[ecb->tag[1]] != ecb)) 1308 panic("%s: slot %d for lun %" PRIx64 " has %p " 1309 "instead of ecb %p\n", __func__, ecb->tag[1], 1310 lun, 1311 li->queued[ecb->tag[1]], ecb); 1312 #endif 1313 li->queued[ecb->tag[1]] = NULL; 1314 li->used--; 1315 } 1316 1317 if ((ecb->flags & ECB_READY) != 0) { 1318 ecb->flags &= ~ECB_READY; 1319 TAILQ_REMOVE(&sc->ready_list, ecb, chain); 1320 } 1321 } 1322 1323 /* 1324 * INTERRUPT/PROTOCOL ENGINE 1325 */ 1326 1327 /* 1328 * Schedule an outgoing message by prioritizing it, and asserting 1329 * attention on the bus. We can only do this when we are the initiator 1330 * else there will be an illegal command interrupt. 1331 */ 1332 #define ncr53c9x_sched_msgout(m) \ 1333 do { \ 1334 NCR_MSGS(("ncr53c9x_sched_msgout %x %d", m, __LINE__)); \ 1335 NCRCMD(sc, NCRCMD_SETATN); \ 1336 sc->sc_flags |= NCR_ATN; \ 1337 sc->sc_msgpriq |= (m); \ 1338 } while (/* CONSTCOND */0) 1339 1340 static void 1341 ncr53c9x_flushfifo(struct ncr53c9x_softc *sc) 1342 { 1343 1344 NCR_TRACE(("[flushfifo] ")); 1345 1346 NCRCMD(sc, NCRCMD_FLUSH); 1347 1348 if (sc->sc_phase == COMMAND_PHASE || 1349 sc->sc_phase == MESSAGE_OUT_PHASE) 1350 DELAY(2); 1351 } 1352 1353 static int 1354 ncr53c9x_rdfifo(struct ncr53c9x_softc *sc, int how) 1355 { 1356 int i, n; 1357 uint8_t *ibuf; 1358 1359 switch (how) { 1360 case NCR_RDFIFO_START: 1361 ibuf = sc->sc_imess; 1362 sc->sc_imlen = 0; 1363 break; 1364 case NCR_RDFIFO_CONTINUE: 1365 ibuf = sc->sc_imess + sc->sc_imlen; 1366 break; 1367 default: 1368 panic("%s: bad flag", __func__); 1369 break; 1370 } 1371 1372 /* 1373 * XXX buffer (sc_imess) size for message 1374 */ 1375 1376 n = NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF; 1377 1378 if (sc->sc_rev == NCR_VARIANT_FAS366) { 1379 n *= 2; 1380 1381 for (i = 0; i < n; i++) 1382 ibuf[i] = NCR_READ_REG(sc, NCR_FIFO); 1383 1384 if (sc->sc_espstat2 & NCRFAS_STAT2_ISHUTTLE) { 1385 1386 NCR_WRITE_REG(sc, NCR_FIFO, 0); 1387 ibuf[i++] = NCR_READ_REG(sc, NCR_FIFO); 1388 1389 NCR_READ_REG(sc, NCR_FIFO); 1390 1391 ncr53c9x_flushfifo(sc); 1392 } 1393 } else { 1394 for (i = 0; i < n; i++) 1395 ibuf[i] = NCR_READ_REG(sc, NCR_FIFO); 1396 } 1397 1398 sc->sc_imlen += i; 1399 1400 #if 0 1401 #ifdef NCR53C9X_DEBUG 1402 { 1403 int j; 1404 1405 NCR_TRACE(("\n[rdfifo %s (%d):", 1406 (how == NCR_RDFIFO_START) ? "start" : "cont", 1407 (int)sc->sc_imlen)); 1408 if (ncr53c9x_debug & NCR_SHOWTRAC) { 1409 for (j = 0; j < sc->sc_imlen; j++) 1410 printf(" %02x", sc->sc_imess[j]); 1411 printf("]\n"); 1412 } 1413 } 1414 #endif 1415 #endif 1416 return sc->sc_imlen; 1417 } 1418 1419 static void 1420 ncr53c9x_wrfifo(struct ncr53c9x_softc *sc, uint8_t *p, int len) 1421 { 1422 int i; 1423 1424 #ifdef NCR53C9X_DEBUG 1425 NCR_MSGS(("[wrfifo(%d):", len)); 1426 if (ncr53c9x_debug & NCR_SHOWMSGS) { 1427 for (i = 0; i < len; i++) 1428 printf(" %02x", p[i]); 1429 printf("]\n"); 1430 } 1431 #endif 1432 1433 for (i = 0; i < len; i++) { 1434 NCR_WRITE_REG(sc, NCR_FIFO, p[i]); 1435 1436 if (sc->sc_rev == NCR_VARIANT_FAS366) 1437 NCR_WRITE_REG(sc, NCR_FIFO, 0); 1438 } 1439 } 1440 1441 int 1442 ncr53c9x_reselect(struct ncr53c9x_softc *sc, int message, int tagtype, 1443 int tagid) 1444 { 1445 uint8_t selid, target, lun; 1446 struct ncr53c9x_ecb *ecb = NULL; 1447 struct ncr53c9x_tinfo *ti; 1448 struct ncr53c9x_linfo *li; 1449 1450 if (sc->sc_rev == NCR_VARIANT_FAS366) { 1451 target = sc->sc_selid; 1452 } else { 1453 /* 1454 * The SCSI chip made a snapshot of the data bus 1455 * while the reselection was being negotiated. 1456 * This enables us to determine which target did 1457 * the reselect. 1458 */ 1459 selid = sc->sc_selid & ~(1 << sc->sc_id); 1460 if (selid & (selid - 1)) { 1461 printf("%s: reselect with invalid selid %02x;" 1462 " sending DEVICE RESET\n", 1463 device_xname(sc->sc_dev), selid); 1464 goto reset; 1465 } 1466 1467 target = ffs(selid) - 1; 1468 } 1469 lun = message & 0x07; 1470 1471 /* 1472 * Search wait queue for disconnected cmd 1473 * The list should be short, so I haven't bothered with 1474 * any more sophisticated structures than a simple 1475 * singly linked list. 1476 */ 1477 ti = &sc->sc_tinfo[target]; 1478 li = TINFO_LUN(ti, lun); 1479 1480 /* 1481 * We can get as far as the LUN with the IDENTIFY 1482 * message. Check to see if we're running an 1483 * un-tagged command. Otherwise ack the IDENTIFY 1484 * and wait for a tag message. 1485 */ 1486 if (li != NULL) { 1487 if (li->untagged != NULL && li->busy) 1488 ecb = li->untagged; 1489 else if (tagtype != MSG_SIMPLE_Q_TAG) { 1490 /* Wait for tag to come by */ 1491 sc->sc_state = NCR_IDENTIFIED; 1492 return 0; 1493 } else if (tagtype) 1494 ecb = li->queued[tagid]; 1495 } 1496 if (ecb == NULL) { 1497 printf("%s: reselect from target %d lun %d tag %x:%x " 1498 "with no nexus; sending ABORT\n", 1499 device_xname(sc->sc_dev), target, lun, tagtype, tagid); 1500 goto abort; 1501 } 1502 1503 /* Make this nexus active again. */ 1504 sc->sc_state = NCR_CONNECTED; 1505 sc->sc_nexus = ecb; 1506 ncr53c9x_setsync(sc, ti); 1507 1508 if (ecb->flags & ECB_RESET) 1509 ncr53c9x_sched_msgout(SEND_DEV_RESET); 1510 else if (ecb->flags & ECB_ABORT) 1511 ncr53c9x_sched_msgout(SEND_ABORT); 1512 1513 /* Do an implicit RESTORE POINTERS. */ 1514 sc->sc_dp = ecb->daddr; 1515 sc->sc_dleft = ecb->dleft; 1516 1517 return 0; 1518 1519 reset: 1520 ncr53c9x_sched_msgout(SEND_DEV_RESET); 1521 return 1; 1522 1523 abort: 1524 ncr53c9x_sched_msgout(SEND_ABORT); 1525 return 1; 1526 } 1527 1528 static inline int 1529 __verify_msg_format(uint8_t *p, int len) 1530 { 1531 1532 if (len == 1 && MSG_IS1BYTE(p[0])) 1533 return 1; 1534 if (len == 2 && MSG_IS2BYTE(p[0])) 1535 return 1; 1536 if (len >= 3 && MSG_ISEXTENDED(p[0]) && 1537 len == p[1] + 2) 1538 return 1; 1539 1540 return 0; 1541 } 1542 1543 /* 1544 * Get an incoming message as initiator. 1545 * 1546 * The SCSI bus must already be in MESSAGE_IN_PHASE and there is a 1547 * byte in the FIFO 1548 */ 1549 void 1550 ncr53c9x_msgin(struct ncr53c9x_softc *sc) 1551 { 1552 1553 NCR_TRACE(("[ncr53c9x_msgin(curmsglen:%ld)] ", (long)sc->sc_imlen)); 1554 1555 if (sc->sc_imlen == 0) { 1556 printf("%s: msgin: no msg byte available\n", 1557 device_xname(sc->sc_dev)); 1558 return; 1559 } 1560 1561 /* 1562 * Prepare for a new message. A message should (according 1563 * to the SCSI standard) be transmitted in one single 1564 * MESSAGE_IN_PHASE. If we have been in some other phase, 1565 * then this is a new message. 1566 */ 1567 if (sc->sc_prevphase != MESSAGE_IN_PHASE && 1568 sc->sc_state != NCR_RESELECTED) { 1569 printf("%s: phase change, dropping message, " 1570 "prev %d, state %d\n", 1571 device_xname(sc->sc_dev), sc->sc_prevphase, sc->sc_state); 1572 sc->sc_flags &= ~NCR_DROP_MSGI; 1573 sc->sc_imlen = 0; 1574 } 1575 1576 /* 1577 * If we're going to reject the message, don't bother storing 1578 * the incoming bytes. But still, we need to ACK them. 1579 */ 1580 if ((sc->sc_flags & NCR_DROP_MSGI) != 0) { 1581 NCRCMD(sc, NCRCMD_MSGOK); 1582 printf("<dropping msg byte %x>", sc->sc_imess[sc->sc_imlen]); 1583 return; 1584 } 1585 1586 if (sc->sc_imlen >= NCR_MAX_MSG_LEN) { 1587 ncr53c9x_sched_msgout(SEND_REJECT); 1588 sc->sc_flags |= NCR_DROP_MSGI; 1589 } else { 1590 uint8_t *pb; 1591 int plen; 1592 1593 switch (sc->sc_state) { 1594 /* 1595 * if received message is the first of reselection 1596 * then first byte is selid, and then message 1597 */ 1598 case NCR_RESELECTED: 1599 pb = sc->sc_imess + 1; 1600 plen = sc->sc_imlen - 1; 1601 break; 1602 default: 1603 pb = sc->sc_imess; 1604 plen = sc->sc_imlen; 1605 break; 1606 } 1607 1608 if (__verify_msg_format(pb, plen)) 1609 goto gotit; 1610 } 1611 1612 /* Ack what we have so far */ 1613 NCRCMD(sc, NCRCMD_MSGOK); 1614 return; 1615 1616 gotit: 1617 NCR_MSGS(("gotmsg(%x) state %d", sc->sc_imess[0], sc->sc_state)); 1618 /* we got complete message, flush the imess, */ 1619 /* XXX nobody uses imlen below */ 1620 sc->sc_imlen = 0; 1621 /* 1622 * Now we should have a complete message (1 byte, 2 byte 1623 * and moderately long extended messages). We only handle 1624 * extended messages which total length is shorter than 1625 * NCR_MAX_MSG_LEN. Longer messages will be amputated. 1626 */ 1627 switch (sc->sc_state) { 1628 struct ncr53c9x_ecb *ecb; 1629 struct ncr53c9x_tinfo *ti; 1630 struct ncr53c9x_linfo *li; 1631 int lun; 1632 1633 case NCR_CONNECTED: 1634 ecb = sc->sc_nexus; 1635 ti = &sc->sc_tinfo[ecb->xs->xs_periph->periph_target]; 1636 1637 switch (sc->sc_imess[0]) { 1638 case MSG_CMDCOMPLETE: 1639 NCR_MSGS(("cmdcomplete ")); 1640 if (sc->sc_dleft < 0) { 1641 scsipi_printaddr(ecb->xs->xs_periph); 1642 printf("%s: got %ld extra bytes\n", 1643 device_xname(sc->sc_dev), 1644 -(long)sc->sc_dleft); 1645 sc->sc_dleft = 0; 1646 } 1647 ecb->dleft = (ecb->flags & ECB_TENTATIVE_DONE) ? 1648 0 : sc->sc_dleft; 1649 if ((ecb->flags & ECB_SENSE) == 0) 1650 ecb->xs->resid = ecb->dleft; 1651 sc->sc_state = NCR_CMDCOMPLETE; 1652 break; 1653 1654 case MSG_MESSAGE_REJECT: 1655 NCR_MSGS(("msg reject (msgout=%x) ", sc->sc_msgout)); 1656 switch (sc->sc_msgout) { 1657 case SEND_TAG: 1658 /* 1659 * Target does not like tagged queuing. 1660 * - Flush the command queue 1661 * - Disable tagged queuing for the target 1662 * - Dequeue ecb from the queued array. 1663 */ 1664 printf("%s: tagged queuing rejected: " 1665 "target %d\n", 1666 device_xname(sc->sc_dev), 1667 ecb->xs->xs_periph->periph_target); 1668 1669 NCR_MSGS(("(rejected sent tag)")); 1670 NCRCMD(sc, NCRCMD_FLUSH); 1671 DELAY(1); 1672 ti->flags &= ~T_TAG; 1673 lun = ecb->xs->xs_periph->periph_lun; 1674 li = TINFO_LUN(ti, lun); 1675 if (ecb->tag[0] && 1676 li->queued[ecb->tag[1]] != NULL) { 1677 li->queued[ecb->tag[1]] = NULL; 1678 li->used--; 1679 } 1680 ecb->tag[0] = ecb->tag[1] = 0; 1681 li->untagged = ecb; 1682 li->busy = 1; 1683 break; 1684 1685 case SEND_SDTR: 1686 printf("%s: sync transfer rejected: " 1687 "target %d\n", 1688 device_xname(sc->sc_dev), 1689 ecb->xs->xs_periph->periph_target); 1690 1691 sc->sc_flags &= ~NCR_SYNCHNEGO; 1692 ti->flags &= ~(T_NEGOTIATE | T_SYNCMODE); 1693 ncr53c9x_setsync(sc, ti); 1694 ncr53c9x_update_xfer_mode(sc, 1695 ecb->xs->xs_periph->periph_target); 1696 break; 1697 1698 case SEND_WDTR: 1699 printf("%s: wide transfer rejected: " 1700 "target %d\n", 1701 device_xname(sc->sc_dev), 1702 ecb->xs->xs_periph->periph_target); 1703 ti->flags &= ~(T_WIDE | T_WDTRSENT); 1704 ti->width = 0; 1705 break; 1706 1707 case SEND_INIT_DET_ERR: 1708 goto abort; 1709 } 1710 break; 1711 1712 case MSG_NOOP: 1713 NCR_MSGS(("noop ")); 1714 break; 1715 1716 case MSG_HEAD_OF_Q_TAG: 1717 case MSG_SIMPLE_Q_TAG: 1718 case MSG_ORDERED_Q_TAG: 1719 NCR_MSGS(("TAG %x:%x", 1720 sc->sc_imess[0], sc->sc_imess[1])); 1721 break; 1722 1723 case MSG_DISCONNECT: 1724 NCR_MSGS(("disconnect ")); 1725 ti->dconns++; 1726 sc->sc_state = NCR_DISCONNECT; 1727 1728 /* 1729 * Mark the fact that all bytes have moved. The 1730 * target may not bother to do a SAVE POINTERS 1731 * at this stage. This flag will set the residual 1732 * count to zero on MSG COMPLETE. 1733 */ 1734 if (sc->sc_dleft == 0) 1735 ecb->flags |= ECB_TENTATIVE_DONE; 1736 1737 break; 1738 1739 case MSG_SAVEDATAPOINTER: 1740 NCR_MSGS(("save datapointer ")); 1741 ecb->daddr = sc->sc_dp; 1742 ecb->dleft = sc->sc_dleft; 1743 break; 1744 1745 case MSG_RESTOREPOINTERS: 1746 NCR_MSGS(("restore datapointer ")); 1747 sc->sc_dp = ecb->daddr; 1748 sc->sc_dleft = ecb->dleft; 1749 break; 1750 1751 case MSG_EXTENDED: 1752 NCR_MSGS(("extended(%x) ", sc->sc_imess[2])); 1753 switch (sc->sc_imess[2]) { 1754 case MSG_EXT_SDTR: 1755 NCR_MSGS(("SDTR period %d, offset %d ", 1756 sc->sc_imess[3], sc->sc_imess[4])); 1757 if (sc->sc_imess[1] != 3) 1758 goto reject; 1759 ti->period = sc->sc_imess[3]; 1760 ti->offset = sc->sc_imess[4]; 1761 ti->flags &= ~T_NEGOTIATE; 1762 if (sc->sc_minsync == 0 || 1763 ti->offset == 0 || 1764 ti->period > 124) { 1765 #if 0 1766 #ifdef NCR53C9X_DEBUG 1767 scsipi_printaddr(ecb->xs->xs_periph); 1768 printf("async mode\n"); 1769 #endif 1770 #endif 1771 ti->flags &= ~T_SYNCMODE; 1772 if ((sc->sc_flags&NCR_SYNCHNEGO) == 0) { 1773 /* 1774 * target initiated negotiation 1775 */ 1776 ti->offset = 0; 1777 ncr53c9x_sched_msgout( 1778 SEND_SDTR); 1779 } 1780 } else { 1781 int p; 1782 1783 p = ncr53c9x_stp2cpb(sc, ti->period); 1784 ti->period = ncr53c9x_cpb2stp(sc, p); 1785 if ((sc->sc_flags&NCR_SYNCHNEGO) == 0) { 1786 /* 1787 * target initiated negotiation 1788 */ 1789 if (ti->period < 1790 sc->sc_minsync) 1791 ti->period = 1792 sc->sc_minsync; 1793 if (ti->offset > 15) 1794 ti->offset = 15; 1795 ti->flags &= ~T_SYNCMODE; 1796 ncr53c9x_sched_msgout( 1797 SEND_SDTR); 1798 } else { 1799 /* we are sync */ 1800 ti->flags |= T_SYNCMODE; 1801 } 1802 } 1803 ncr53c9x_update_xfer_mode(sc, 1804 ecb->xs->xs_periph->periph_target); 1805 sc->sc_flags &= ~NCR_SYNCHNEGO; 1806 ncr53c9x_setsync(sc, ti); 1807 break; 1808 1809 case MSG_EXT_WDTR: 1810 #ifdef NCR53C9X_DEBUG 1811 printf("%s: wide mode %d\n", 1812 device_xname(sc->sc_dev), sc->sc_imess[3]); 1813 #endif 1814 if (sc->sc_imess[3] == 1) { 1815 ti->cfg3 |= NCRFASCFG3_EWIDE; 1816 ncr53c9x_setsync(sc, ti); 1817 } else 1818 ti->width = 0; 1819 /* 1820 * Device started width negotiation. 1821 */ 1822 if ((ti->flags & T_WDTRSENT) == 0) 1823 ncr53c9x_sched_msgout(SEND_WDTR); 1824 ti->flags &= ~(T_WIDE | T_WDTRSENT); 1825 break; 1826 default: 1827 scsipi_printaddr(ecb->xs->xs_periph); 1828 printf("%s: unrecognized MESSAGE EXTENDED;" 1829 " sending REJECT\n", 1830 device_xname(sc->sc_dev)); 1831 goto reject; 1832 } 1833 break; 1834 case MSG_IGN_WIDE_RESIDUE: 1835 NCR_MSGS(("ignore wide residue ")); 1836 break; 1837 1838 default: 1839 NCR_MSGS(("ident ")); 1840 scsipi_printaddr(ecb->xs->xs_periph); 1841 printf("%s: unrecognized MESSAGE (%x); sending REJECT\n", 1842 device_xname(sc->sc_dev), sc->sc_imess[0]); 1843 reject: 1844 ncr53c9x_sched_msgout(SEND_REJECT); 1845 break; 1846 } 1847 break; 1848 1849 case NCR_IDENTIFIED: 1850 /* 1851 * IDENTIFY message was received and queue tag is expected now 1852 */ 1853 if ((sc->sc_imess[0] != MSG_SIMPLE_Q_TAG) || 1854 (sc->sc_msgify == 0)) { 1855 printf("%s: TAG reselect without IDENTIFY;" 1856 " MSG %x;" 1857 " sending DEVICE RESET\n", 1858 device_xname(sc->sc_dev), 1859 sc->sc_imess[0]); 1860 goto reset; 1861 } 1862 (void)ncr53c9x_reselect(sc, sc->sc_msgify, 1863 sc->sc_imess[0], sc->sc_imess[1]); 1864 break; 1865 1866 case NCR_RESELECTED: 1867 if (MSG_ISIDENTIFY(sc->sc_imess[1])) { 1868 sc->sc_msgify = sc->sc_imess[1]; 1869 } else { 1870 printf("%s: reselect without IDENTIFY;" 1871 " MSG %x;" 1872 " sending DEVICE RESET\n", 1873 device_xname(sc->sc_dev), 1874 sc->sc_imess[1]); 1875 goto reset; 1876 } 1877 (void)ncr53c9x_reselect(sc, sc->sc_msgify, 0, 0); 1878 break; 1879 1880 default: 1881 printf("%s: unexpected MESSAGE IN; sending DEVICE RESET\n", 1882 device_xname(sc->sc_dev)); 1883 reset: 1884 ncr53c9x_sched_msgout(SEND_DEV_RESET); 1885 break; 1886 1887 abort: 1888 ncr53c9x_sched_msgout(SEND_ABORT); 1889 break; 1890 } 1891 1892 /* if we have more messages to send set ATN */ 1893 if (sc->sc_msgpriq) 1894 NCRCMD(sc, NCRCMD_SETATN); 1895 1896 /* Ack last message byte */ 1897 NCRCMD(sc, NCRCMD_MSGOK); 1898 1899 /* Done, reset message pointer. */ 1900 sc->sc_flags &= ~NCR_DROP_MSGI; 1901 sc->sc_imlen = 0; 1902 } 1903 1904 1905 /* 1906 * Send the highest priority, scheduled message 1907 */ 1908 void 1909 ncr53c9x_msgout(struct ncr53c9x_softc *sc) 1910 { 1911 struct ncr53c9x_tinfo *ti; 1912 struct ncr53c9x_ecb *ecb; 1913 size_t size; 1914 1915 NCR_TRACE(("[ncr53c9x_msgout(priq:%x, prevphase:%x)]", 1916 sc->sc_msgpriq, sc->sc_prevphase)); 1917 1918 /* 1919 * XXX - the NCR_ATN flag is not in sync with the actual ATN 1920 * condition on the SCSI bus. The 53c9x chip 1921 * automatically turns off ATN before sending the 1922 * message byte. (see also the comment below in the 1923 * default case when picking out a message to send) 1924 */ 1925 if (sc->sc_flags & NCR_ATN) { 1926 if (sc->sc_prevphase != MESSAGE_OUT_PHASE) { 1927 new: 1928 NCRCMD(sc, NCRCMD_FLUSH); 1929 #if 0 1930 DELAY(1); 1931 #endif 1932 sc->sc_msgoutq = 0; 1933 sc->sc_omlen = 0; 1934 } 1935 } else { 1936 if (sc->sc_prevphase == MESSAGE_OUT_PHASE) { 1937 ncr53c9x_sched_msgout(sc->sc_msgoutq); 1938 goto new; 1939 } else { 1940 printf("%s at line %d: unexpected MESSAGE OUT phase\n", 1941 device_xname(sc->sc_dev), __LINE__); 1942 } 1943 } 1944 1945 if (sc->sc_omlen == 0) { 1946 /* Pick up highest priority message */ 1947 sc->sc_msgout = sc->sc_msgpriq & -sc->sc_msgpriq; 1948 sc->sc_msgoutq |= sc->sc_msgout; 1949 sc->sc_msgpriq &= ~sc->sc_msgout; 1950 sc->sc_omlen = 1; /* "Default" message len */ 1951 switch (sc->sc_msgout) { 1952 case SEND_SDTR: 1953 ecb = sc->sc_nexus; 1954 ti = &sc->sc_tinfo[ecb->xs->xs_periph->periph_target]; 1955 sc->sc_omess[0] = MSG_EXTENDED; 1956 sc->sc_omess[1] = MSG_EXT_SDTR_LEN; 1957 sc->sc_omess[2] = MSG_EXT_SDTR; 1958 sc->sc_omess[3] = ti->period; 1959 sc->sc_omess[4] = ti->offset; 1960 sc->sc_omlen = 5; 1961 if ((sc->sc_flags & NCR_SYNCHNEGO) == 0) { 1962 ti->flags |= T_SYNCMODE; 1963 ncr53c9x_setsync(sc, ti); 1964 } 1965 break; 1966 case SEND_WDTR: 1967 ecb = sc->sc_nexus; 1968 ti = &sc->sc_tinfo[ecb->xs->xs_periph->periph_target]; 1969 sc->sc_omess[0] = MSG_EXTENDED; 1970 sc->sc_omess[1] = MSG_EXT_WDTR_LEN; 1971 sc->sc_omess[2] = MSG_EXT_WDTR; 1972 sc->sc_omess[3] = ti->width; 1973 sc->sc_omlen = 4; 1974 break; 1975 case SEND_IDENTIFY: 1976 if (sc->sc_state != NCR_CONNECTED) { 1977 printf("%s at line %d: no nexus\n", 1978 device_xname(sc->sc_dev), __LINE__); 1979 } 1980 ecb = sc->sc_nexus; 1981 sc->sc_omess[0] = 1982 MSG_IDENTIFY(ecb->xs->xs_periph->periph_lun, 0); 1983 break; 1984 case SEND_TAG: 1985 if (sc->sc_state != NCR_CONNECTED) { 1986 printf("%s at line %d: no nexus\n", 1987 device_xname(sc->sc_dev), __LINE__); 1988 } 1989 ecb = sc->sc_nexus; 1990 sc->sc_omess[0] = ecb->tag[0]; 1991 sc->sc_omess[1] = ecb->tag[1]; 1992 sc->sc_omlen = 2; 1993 break; 1994 case SEND_DEV_RESET: 1995 sc->sc_flags |= NCR_ABORTING; 1996 sc->sc_omess[0] = MSG_BUS_DEV_RESET; 1997 ecb = sc->sc_nexus; 1998 ti = &sc->sc_tinfo[ecb->xs->xs_periph->periph_target]; 1999 ti->flags &= ~T_SYNCMODE; 2000 ncr53c9x_update_xfer_mode(sc, 2001 ecb->xs->xs_periph->periph_target); 2002 if ((ti->flags & T_SYNCHOFF) == 0) 2003 /* We can re-start sync negotiation */ 2004 ti->flags |= T_NEGOTIATE; 2005 break; 2006 case SEND_PARITY_ERROR: 2007 sc->sc_omess[0] = MSG_PARITY_ERROR; 2008 break; 2009 case SEND_ABORT: 2010 sc->sc_flags |= NCR_ABORTING; 2011 sc->sc_omess[0] = MSG_ABORT; 2012 break; 2013 case SEND_INIT_DET_ERR: 2014 sc->sc_omess[0] = MSG_INITIATOR_DET_ERR; 2015 break; 2016 case SEND_REJECT: 2017 sc->sc_omess[0] = MSG_MESSAGE_REJECT; 2018 break; 2019 default: 2020 /* 2021 * We normally do not get here, since the chip 2022 * automatically turns off ATN before the last 2023 * byte of a message is sent to the target. 2024 * However, if the target rejects our (multi-byte) 2025 * message early by switching to MSG IN phase 2026 * ATN remains on, so the target may return to 2027 * MSG OUT phase. If there are no scheduled messages 2028 * left we send a NO-OP. 2029 * 2030 * XXX - Note that this leaves no useful purpose for 2031 * the NCR_ATN flag. 2032 */ 2033 sc->sc_flags &= ~NCR_ATN; 2034 sc->sc_omess[0] = MSG_NOOP; 2035 break; 2036 } 2037 sc->sc_omp = sc->sc_omess; 2038 } 2039 2040 #ifdef DEBUG 2041 if (ncr53c9x_debug & NCR_SHOWMSGS) { 2042 int i; 2043 2044 NCR_MSGS(("<msgout:")); 2045 for (i = 0; i < sc->sc_omlen; i++) 2046 NCR_MSGS((" %02x", sc->sc_omess[i])); 2047 NCR_MSGS(("> ")); 2048 } 2049 #endif 2050 if (sc->sc_rev == NCR_VARIANT_FAS366) { 2051 /* 2052 * XXX fifo size 2053 */ 2054 ncr53c9x_flushfifo(sc); 2055 ncr53c9x_wrfifo(sc, sc->sc_omp, sc->sc_omlen); 2056 sc->sc_cmdlen = 0; 2057 NCRCMD(sc, NCRCMD_TRANS); 2058 } else { 2059 /* (re)send the message */ 2060 size = uimin(sc->sc_omlen, sc->sc_maxxfer); 2061 NCRDMA_SETUP(sc, &sc->sc_omp, &sc->sc_omlen, 0, &size); 2062 /* Program the SCSI counter */ 2063 NCR_SET_COUNT(sc, size); 2064 2065 /* Load the count in and start the message-out transfer */ 2066 NCRCMD(sc, NCRCMD_NOP | NCRCMD_DMA); 2067 NCRCMD(sc, NCRCMD_TRANS | NCRCMD_DMA); 2068 NCRDMA_GO(sc); 2069 } 2070 } 2071 2072 /* 2073 * This is the most critical part of the driver, and has to know 2074 * how to deal with *all* error conditions and phases from the SCSI 2075 * bus. If there are no errors and the DMA was active, then call the 2076 * DMA pseudo-interrupt handler. If this returns 1, then that was it 2077 * and we can return from here without further processing. 2078 * 2079 * Most of this needs verifying. 2080 */ 2081 int 2082 ncr53c9x_intr(void *arg) 2083 { 2084 struct ncr53c9x_softc *sc = arg; 2085 struct ncr53c9x_ecb *ecb; 2086 struct scsipi_periph *periph; 2087 struct ncr53c9x_tinfo *ti; 2088 size_t size; 2089 int nfifo; 2090 2091 NCR_INTS(("[ncr53c9x_intr: state %d]", sc->sc_state)); 2092 2093 if (!NCRDMA_ISINTR(sc)) 2094 return 0; 2095 2096 mutex_enter(&sc->sc_lock); 2097 again: 2098 /* and what do the registers say... */ 2099 ncr53c9x_readregs(sc); 2100 2101 sc->sc_intrcnt.ev_count++; 2102 2103 /* 2104 * At the moment, only a SCSI Bus Reset or Illegal 2105 * Command are classed as errors. A disconnect is a 2106 * valid condition, and we let the code check is the 2107 * "NCR_BUSFREE_OK" flag was set before declaring it 2108 * and error. 2109 * 2110 * Also, the status register tells us about "Gross 2111 * Errors" and "Parity errors". Only the Gross Error 2112 * is really bad, and the parity errors are dealt 2113 * with later 2114 * 2115 * TODO 2116 * If there are too many parity error, go to slow 2117 * cable mode ? 2118 */ 2119 2120 /* SCSI Reset */ 2121 if ((sc->sc_espintr & NCRINTR_SBR) != 0) { 2122 if ((NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF) != 0) { 2123 NCRCMD(sc, NCRCMD_FLUSH); 2124 DELAY(1); 2125 } 2126 if (sc->sc_state != NCR_SBR) { 2127 printf("%s: SCSI bus reset\n", 2128 device_xname(sc->sc_dev)); 2129 ncr53c9x_init(sc, 0); /* Restart everything */ 2130 goto out; 2131 } 2132 #if 0 2133 /*XXX*/ printf("<expected bus reset: " 2134 "[intr %x, stat %x, step %d]>\n", 2135 sc->sc_espintr, sc->sc_espstat, sc->sc_espstep); 2136 #endif 2137 if (sc->sc_nexus != NULL) 2138 panic("%s: nexus in reset state", 2139 device_xname(sc->sc_dev)); 2140 goto sched; 2141 } 2142 2143 ecb = sc->sc_nexus; 2144 2145 #define NCRINTR_ERR (NCRINTR_SBR|NCRINTR_ILL) 2146 if (sc->sc_espintr & NCRINTR_ERR || 2147 sc->sc_espstat & NCRSTAT_GE) { 2148 2149 if ((sc->sc_espstat & NCRSTAT_GE) != 0) { 2150 /* Gross Error; no target ? */ 2151 if (NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF) { 2152 NCRCMD(sc, NCRCMD_FLUSH); 2153 DELAY(1); 2154 } 2155 if (sc->sc_state == NCR_CONNECTED || 2156 sc->sc_state == NCR_SELECTING) { 2157 ecb->xs->error = XS_TIMEOUT; 2158 ncr53c9x_done(sc, ecb); 2159 } 2160 goto out; 2161 } 2162 2163 if ((sc->sc_espintr & NCRINTR_ILL) != 0) { 2164 if ((sc->sc_flags & NCR_EXPECT_ILLCMD) != 0) { 2165 /* 2166 * Eat away "Illegal command" interrupt 2167 * on a ESP100 caused by a re-selection 2168 * while we were trying to select 2169 * another target. 2170 */ 2171 #ifdef NCR53C9X_DEBUG 2172 printf("%s: ESP100 work-around activated\n", 2173 device_xname(sc->sc_dev)); 2174 #endif 2175 sc->sc_flags &= ~NCR_EXPECT_ILLCMD; 2176 goto out; 2177 } 2178 /* illegal command, out of sync ? */ 2179 printf("%s: illegal command: 0x%x " 2180 "(state %d, phase %x, prevphase %x)\n", 2181 device_xname(sc->sc_dev), sc->sc_lastcmd, 2182 sc->sc_state, sc->sc_phase, sc->sc_prevphase); 2183 if (NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF) { 2184 NCRCMD(sc, NCRCMD_FLUSH); 2185 DELAY(1); 2186 } 2187 ncr53c9x_init(sc, 1); /* Restart everything */ 2188 goto out; 2189 } 2190 } 2191 sc->sc_flags &= ~NCR_EXPECT_ILLCMD; 2192 2193 /* 2194 * Call if DMA is active. 2195 * 2196 * If DMA_INTR returns true, then maybe go 'round the loop 2197 * again in case there is no more DMA queued, but a phase 2198 * change is expected. 2199 */ 2200 if (NCRDMA_ISACTIVE(sc)) { 2201 int r = NCRDMA_INTR(sc); 2202 if (r == -1) { 2203 printf("%s: DMA error; resetting\n", 2204 device_xname(sc->sc_dev)); 2205 ncr53c9x_init(sc, 1); 2206 goto out; 2207 } 2208 /* If DMA active here, then go back to work... */ 2209 if (NCRDMA_ISACTIVE(sc)) 2210 goto out; 2211 2212 if ((sc->sc_espstat & NCRSTAT_TC) == 0) { 2213 /* 2214 * DMA not completed. If we can not find a 2215 * acceptable explanation, print a diagnostic. 2216 */ 2217 if (sc->sc_state == NCR_SELECTING) 2218 /* 2219 * This can happen if we are reselected 2220 * while using DMA to select a target. 2221 */ 2222 /*void*/; 2223 else if (sc->sc_prevphase == MESSAGE_OUT_PHASE) { 2224 /* 2225 * Our (multi-byte) message (eg SDTR) was 2226 * interrupted by the target to send 2227 * a MSG REJECT. 2228 * Print diagnostic if current phase 2229 * is not MESSAGE IN. 2230 */ 2231 if (sc->sc_phase != MESSAGE_IN_PHASE) 2232 printf("%s: !TC on MSG OUT" 2233 " [intr %x, stat %x, step %d]" 2234 " prevphase %x, resid %lx\n", 2235 device_xname(sc->sc_dev), 2236 sc->sc_espintr, 2237 sc->sc_espstat, 2238 sc->sc_espstep, 2239 sc->sc_prevphase, 2240 (u_long)sc->sc_omlen); 2241 } else if (sc->sc_dleft == 0) { 2242 /* 2243 * The DMA operation was started for 2244 * a DATA transfer. Print a diagnostic 2245 * if the DMA counter and TC bit 2246 * appear to be out of sync. 2247 */ 2248 printf("%s: !TC on DATA XFER" 2249 " [intr %x, stat %x, step %d]" 2250 " prevphase %x, resid %x\n", 2251 device_xname(sc->sc_dev), 2252 sc->sc_espintr, 2253 sc->sc_espstat, 2254 sc->sc_espstep, 2255 sc->sc_prevphase, 2256 ecb ? ecb->dleft : -1); 2257 } 2258 } 2259 } 2260 2261 /* 2262 * Check for less serious errors. 2263 */ 2264 if ((sc->sc_espstat & NCRSTAT_PE) != 0) { 2265 printf("%s: SCSI bus parity error\n", device_xname(sc->sc_dev)); 2266 if (sc->sc_prevphase == MESSAGE_IN_PHASE) 2267 ncr53c9x_sched_msgout(SEND_PARITY_ERROR); 2268 else 2269 ncr53c9x_sched_msgout(SEND_INIT_DET_ERR); 2270 } 2271 2272 if ((sc->sc_espintr & NCRINTR_DIS) != 0) { 2273 sc->sc_msgify = 0; 2274 NCR_INTS(("<DISC [intr %x, stat %x, step %d]>", 2275 sc->sc_espintr,sc->sc_espstat,sc->sc_espstep)); 2276 if (NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF) { 2277 NCRCMD(sc, NCRCMD_FLUSH); 2278 #if 0 2279 DELAY(1); 2280 #endif 2281 } 2282 /* 2283 * This command must (apparently) be issued within 2284 * 250mS of a disconnect. So here you are... 2285 */ 2286 NCRCMD(sc, NCRCMD_ENSEL); 2287 2288 switch (sc->sc_state) { 2289 case NCR_RESELECTED: 2290 goto sched; 2291 2292 case NCR_SELECTING: 2293 { 2294 struct ncr53c9x_linfo *li; 2295 2296 ecb->xs->error = XS_SELTIMEOUT; 2297 2298 /* Selection timeout -- discard all LUNs if empty */ 2299 periph = ecb->xs->xs_periph; 2300 ti = &sc->sc_tinfo[periph->periph_target]; 2301 li = LIST_FIRST(&ti->luns); 2302 while (li != NULL) { 2303 if (li->untagged == NULL && li->used == 0) { 2304 if (li->lun < NCR_NLUN) 2305 ti->lun[li->lun] = NULL; 2306 LIST_REMOVE(li, link); 2307 free(li, M_DEVBUF); 2308 /* 2309 * Restart the search at the beginning 2310 */ 2311 li = LIST_FIRST(&ti->luns); 2312 continue; 2313 } 2314 li = LIST_NEXT(li, link); 2315 } 2316 goto finish; 2317 } 2318 case NCR_CONNECTED: 2319 if ((sc->sc_flags & NCR_SYNCHNEGO) != 0) { 2320 #ifdef NCR53C9X_DEBUG 2321 if (ecb != NULL) 2322 scsipi_printaddr(ecb->xs->xs_periph); 2323 printf("sync nego not completed!\n"); 2324 #endif 2325 ti = &sc->sc_tinfo[ 2326 ecb->xs->xs_periph->periph_target]; 2327 sc->sc_flags &= ~NCR_SYNCHNEGO; 2328 ti->flags &= ~(T_NEGOTIATE | T_SYNCMODE); 2329 } 2330 2331 /* it may be OK to disconnect */ 2332 if ((sc->sc_flags & NCR_ABORTING) == 0) { 2333 /* 2334 * Section 5.1.1 of the SCSI 2 spec 2335 * suggests issuing a REQUEST SENSE 2336 * following an unexpected disconnect. 2337 * Some devices go into a contingent 2338 * allegiance condition when 2339 * disconnecting, and this is necessary 2340 * to clean up their state. 2341 */ 2342 printf("%s: unexpected disconnect " 2343 "[state %d, intr %x, stat %x, phase(c %x, p %x)]; ", 2344 device_xname(sc->sc_dev), sc->sc_state, 2345 sc->sc_espintr, sc->sc_espstat, 2346 sc->sc_phase, sc->sc_prevphase); 2347 2348 if ((ecb->flags & ECB_SENSE) != 0) { 2349 printf("resetting\n"); 2350 goto reset; 2351 } 2352 printf("sending REQUEST SENSE\n"); 2353 callout_stop(&ecb->xs->xs_callout); 2354 ncr53c9x_sense(sc, ecb); 2355 goto out; 2356 } 2357 2358 ecb->xs->error = XS_TIMEOUT; 2359 goto finish; 2360 2361 case NCR_DISCONNECT: 2362 sc->sc_nexus = NULL; 2363 goto sched; 2364 2365 case NCR_CMDCOMPLETE: 2366 goto finish; 2367 } 2368 } 2369 2370 switch (sc->sc_state) { 2371 2372 case NCR_SBR: 2373 printf("%s: waiting for SCSI Bus Reset to happen\n", 2374 device_xname(sc->sc_dev)); 2375 goto out; 2376 2377 case NCR_RESELECTED: 2378 /* 2379 * we must be continuing a message ? 2380 */ 2381 printf("%s: unhandled reselect continuation, " 2382 "state %d, intr %02x\n", 2383 device_xname(sc->sc_dev), sc->sc_state, sc->sc_espintr); 2384 ncr53c9x_init(sc, 1); 2385 goto out; 2386 2387 case NCR_IDENTIFIED: 2388 ecb = sc->sc_nexus; 2389 if (sc->sc_phase != MESSAGE_IN_PHASE) { 2390 int i = (NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF); 2391 /* 2392 * Things are seriously screwed up. 2393 * Pull the brakes, i.e. reset 2394 */ 2395 printf("%s: target didn't send tag: %d bytes in fifo\n", 2396 device_xname(sc->sc_dev), i); 2397 /* Drain and display fifo */ 2398 while (i-- > 0) 2399 printf("[%d] ", NCR_READ_REG(sc, NCR_FIFO)); 2400 2401 ncr53c9x_init(sc, 1); 2402 goto out; 2403 } else 2404 goto msgin; 2405 2406 case NCR_IDLE: 2407 case NCR_SELECTING: 2408 ecb = sc->sc_nexus; 2409 if (sc->sc_espintr & NCRINTR_RESEL) { 2410 sc->sc_msgpriq = sc->sc_msgout = sc->sc_msgoutq = 0; 2411 sc->sc_flags = 0; 2412 /* 2413 * If we're trying to select a 2414 * target ourselves, push our command 2415 * back into the ready list. 2416 */ 2417 if (sc->sc_state == NCR_SELECTING) { 2418 NCR_INTS(("backoff selector ")); 2419 callout_stop(&ecb->xs->xs_callout); 2420 ncr53c9x_dequeue(sc, ecb); 2421 TAILQ_INSERT_HEAD(&sc->ready_list, ecb, chain); 2422 ecb->flags |= ECB_READY; 2423 ecb = sc->sc_nexus = NULL; 2424 } 2425 sc->sc_state = NCR_RESELECTED; 2426 if (sc->sc_phase != MESSAGE_IN_PHASE) { 2427 /* 2428 * Things are seriously screwed up. 2429 * Pull the brakes, i.e. reset 2430 */ 2431 printf("%s: target didn't identify\n", 2432 device_xname(sc->sc_dev)); 2433 ncr53c9x_init(sc, 1); 2434 goto out; 2435 } 2436 /* 2437 * The C90 only inhibits FIFO writes until reselection 2438 * is complete, instead of waiting until the interrupt 2439 * status register has been read. So, if the reselect 2440 * happens while we were entering command bytes (for 2441 * another target) some of those bytes can appear in 2442 * the FIFO here, after the interrupt is taken. 2443 * 2444 * To remedy this situation, pull the Selection ID 2445 * and Identify message from the FIFO directly, and 2446 * ignore any extraneous fifo contents. Also, set 2447 * a flag that allows one Illegal Command Interrupt 2448 * to occur which the chip also generates as a result 2449 * of writing to the FIFO during a reselect. 2450 */ 2451 if (sc->sc_rev == NCR_VARIANT_ESP100) { 2452 nfifo = NCR_READ_REG(sc, NCR_FFLAG) & 2453 NCRFIFO_FF; 2454 sc->sc_imess[0] = NCR_READ_REG(sc, NCR_FIFO); 2455 sc->sc_imess[1] = NCR_READ_REG(sc, NCR_FIFO); 2456 sc->sc_imlen = 2; 2457 if (nfifo != 2) { 2458 /* Flush the rest */ 2459 NCRCMD(sc, NCRCMD_FLUSH); 2460 } 2461 sc->sc_flags |= NCR_EXPECT_ILLCMD; 2462 if (nfifo > 2) 2463 nfifo = 2; /* We fixed it.. */ 2464 } else 2465 nfifo = ncr53c9x_rdfifo(sc, NCR_RDFIFO_START); 2466 2467 if (nfifo != 2) { 2468 printf("%s: RESELECT: %d bytes in FIFO! " 2469 "[intr %x, stat %x, step %d, " 2470 "prevphase %x]\n", 2471 device_xname(sc->sc_dev), 2472 nfifo, 2473 sc->sc_espintr, 2474 sc->sc_espstat, 2475 sc->sc_espstep, 2476 sc->sc_prevphase); 2477 ncr53c9x_init(sc, 1); 2478 goto out; 2479 } 2480 sc->sc_selid = sc->sc_imess[0]; 2481 NCR_INTS(("selid=%02x ", sc->sc_selid)); 2482 2483 /* Handle identify message */ 2484 ncr53c9x_msgin(sc); 2485 2486 if (sc->sc_state != NCR_CONNECTED && 2487 sc->sc_state != NCR_IDENTIFIED) { 2488 /* IDENTIFY fail?! */ 2489 printf("%s: identify failed, " 2490 "state %d, intr %02x\n", 2491 device_xname(sc->sc_dev), 2492 sc->sc_state, sc->sc_espintr); 2493 ncr53c9x_init(sc, 1); 2494 goto out; 2495 } 2496 goto shortcut; /* ie. next phase expected soon */ 2497 } 2498 2499 #define NCRINTR_DONE (NCRINTR_FC | NCRINTR_BS) 2500 if ((sc->sc_espintr & NCRINTR_DONE) == NCRINTR_DONE) { 2501 /* 2502 * Arbitration won; examine the `step' register 2503 * to determine how far the selection could progress. 2504 */ 2505 ecb = sc->sc_nexus; 2506 if (ecb == NULL) 2507 panic("%s: no nexus", __func__); 2508 2509 periph = ecb->xs->xs_periph; 2510 ti = &sc->sc_tinfo[periph->periph_target]; 2511 2512 switch (sc->sc_espstep) { 2513 case 0: 2514 /* 2515 * The target did not respond with a 2516 * message out phase - probably an old 2517 * device that doesn't recognize ATN. 2518 * Clear ATN and just continue, the 2519 * target should be in the command 2520 * phase. 2521 * XXXX check for command phase? 2522 */ 2523 NCRCMD(sc, NCRCMD_RSTATN); 2524 break; 2525 case 1: 2526 if ((ti->flags & T_NEGOTIATE) == 0 && 2527 ecb->tag[0] == 0) { 2528 printf("%s: step 1 & !NEG\n", 2529 device_xname(sc->sc_dev)); 2530 goto reset; 2531 } 2532 if (sc->sc_phase != MESSAGE_OUT_PHASE) { 2533 printf("%s: !MSGOUT\n", 2534 device_xname(sc->sc_dev)); 2535 goto reset; 2536 } 2537 if (ti->flags & T_WIDE) { 2538 ti->flags |= T_WDTRSENT; 2539 ncr53c9x_sched_msgout(SEND_WDTR); 2540 } 2541 if (ti->flags & T_NEGOTIATE) { 2542 /* Start negotiating */ 2543 ti->period = sc->sc_minsync; 2544 ti->offset = 15; 2545 sc->sc_flags |= NCR_SYNCHNEGO; 2546 if (ecb->tag[0]) 2547 ncr53c9x_sched_msgout( 2548 SEND_TAG | SEND_SDTR); 2549 else 2550 ncr53c9x_sched_msgout( 2551 SEND_SDTR); 2552 } else { 2553 /* Could not do ATN3 so send TAG */ 2554 ncr53c9x_sched_msgout(SEND_TAG); 2555 } 2556 sc->sc_prevphase = MESSAGE_OUT_PHASE; /* XXXX */ 2557 break; 2558 case 3: 2559 /* 2560 * Grr, this is supposed to mean 2561 * "target left command phase prematurely". 2562 * It seems to happen regularly when 2563 * sync mode is on. 2564 * Look at FIFO to see if command went out. 2565 * (Timing problems?) 2566 */ 2567 if (sc->sc_features & NCR_F_DMASELECT) { 2568 if (sc->sc_cmdlen == 0) 2569 /* Hope for the best.. */ 2570 break; 2571 } else if ((NCR_READ_REG(sc, NCR_FFLAG) 2572 & NCRFIFO_FF) == 0) { 2573 /* Hope for the best.. */ 2574 break; 2575 } 2576 printf("(%s:%d:%d): selection failed;" 2577 " %d left in FIFO " 2578 "[intr %x, stat %x, step %d]\n", 2579 device_xname(sc->sc_dev), 2580 periph->periph_target, 2581 periph->periph_lun, 2582 NCR_READ_REG(sc, NCR_FFLAG) 2583 & NCRFIFO_FF, 2584 sc->sc_espintr, sc->sc_espstat, 2585 sc->sc_espstep); 2586 NCRCMD(sc, NCRCMD_FLUSH); 2587 ncr53c9x_sched_msgout(SEND_ABORT); 2588 goto out; 2589 case 2: 2590 /* Select stuck at Command Phase */ 2591 NCRCMD(sc, NCRCMD_FLUSH); 2592 break; 2593 case 4: 2594 if (sc->sc_features & NCR_F_DMASELECT && 2595 sc->sc_cmdlen != 0) 2596 printf("(%s:%d:%d): select; " 2597 "%lu left in DMA buffer " 2598 "[intr %x, stat %x, step %d]\n", 2599 device_xname(sc->sc_dev), 2600 periph->periph_target, 2601 periph->periph_lun, 2602 (u_long)sc->sc_cmdlen, 2603 sc->sc_espintr, 2604 sc->sc_espstat, 2605 sc->sc_espstep); 2606 /* So far, everything went fine */ 2607 break; 2608 } 2609 2610 sc->sc_prevphase = INVALID_PHASE; /* ?? */ 2611 /* Do an implicit RESTORE POINTERS. */ 2612 sc->sc_dp = ecb->daddr; 2613 sc->sc_dleft = ecb->dleft; 2614 sc->sc_state = NCR_CONNECTED; 2615 break; 2616 2617 } else { 2618 2619 printf("%s: unexpected status after select" 2620 ": [intr %x, stat %x, step %x]\n", 2621 device_xname(sc->sc_dev), 2622 sc->sc_espintr, sc->sc_espstat, sc->sc_espstep); 2623 NCRCMD(sc, NCRCMD_FLUSH); 2624 DELAY(1); 2625 goto reset; 2626 } 2627 if (sc->sc_state == NCR_IDLE) { 2628 printf("%s: stray interrupt\n", 2629 device_xname(sc->sc_dev)); 2630 mutex_exit(&sc->sc_lock); 2631 return 0; 2632 } 2633 break; 2634 2635 case NCR_CONNECTED: 2636 if ((sc->sc_flags & NCR_ICCS) != 0) { 2637 /* "Initiate Command Complete Steps" in progress */ 2638 uint8_t msg; 2639 2640 sc->sc_flags &= ~NCR_ICCS; 2641 2642 if ((sc->sc_espintr & NCRINTR_DONE) == 0) { 2643 printf("%s: ICCS: " 2644 ": [intr %x, stat %x, step %x]\n", 2645 device_xname(sc->sc_dev), 2646 sc->sc_espintr, sc->sc_espstat, 2647 sc->sc_espstep); 2648 } 2649 ncr53c9x_rdfifo(sc, NCR_RDFIFO_START); 2650 if (sc->sc_imlen < 2) 2651 printf("%s: can't get status, only %d bytes\n", 2652 device_xname(sc->sc_dev), 2653 (int)sc->sc_imlen); 2654 ecb->stat = sc->sc_imess[sc->sc_imlen - 2]; 2655 msg = sc->sc_imess[sc->sc_imlen - 1]; 2656 NCR_PHASE(("<stat:(%x,%x)>", ecb->stat, msg)); 2657 if (msg == MSG_CMDCOMPLETE) { 2658 ecb->dleft = (ecb->flags & ECB_TENTATIVE_DONE) 2659 ? 0 : sc->sc_dleft; 2660 if ((ecb->flags & ECB_SENSE) == 0) 2661 ecb->xs->resid = ecb->dleft; 2662 sc->sc_state = NCR_CMDCOMPLETE; 2663 } else 2664 printf("%s: STATUS_PHASE: msg %d\n", 2665 device_xname(sc->sc_dev), msg); 2666 sc->sc_imlen = 0; 2667 NCRCMD(sc, NCRCMD_MSGOK); 2668 goto shortcut; /* ie. wait for disconnect */ 2669 } 2670 break; 2671 2672 default: 2673 printf("%s: invalid state: %d [intr %x, phase(c %x, p %x)]\n", 2674 device_xname(sc->sc_dev), sc->sc_state, 2675 sc->sc_espintr, sc->sc_phase, sc->sc_prevphase); 2676 goto reset; 2677 } 2678 2679 /* 2680 * Driver is now in state NCR_CONNECTED, i.e. we 2681 * have a current command working the SCSI bus. 2682 */ 2683 if (sc->sc_state != NCR_CONNECTED || ecb == NULL) { 2684 panic("%s: no nexus", __func__); 2685 } 2686 2687 switch (sc->sc_phase) { 2688 case MESSAGE_OUT_PHASE: 2689 NCR_PHASE(("MESSAGE_OUT_PHASE ")); 2690 ncr53c9x_msgout(sc); 2691 sc->sc_prevphase = MESSAGE_OUT_PHASE; 2692 break; 2693 2694 case MESSAGE_IN_PHASE: 2695 msgin: 2696 NCR_PHASE(("MESSAGE_IN_PHASE ")); 2697 if ((sc->sc_espintr & NCRINTR_BS) != 0) { 2698 if ((sc->sc_rev != NCR_VARIANT_FAS366) || 2699 (sc->sc_espstat2 & NCRFAS_STAT2_EMPTY) == 0) { 2700 NCRCMD(sc, NCRCMD_FLUSH); 2701 } 2702 sc->sc_flags |= NCR_WAITI; 2703 NCRCMD(sc, NCRCMD_TRANS); 2704 } else if ((sc->sc_espintr & NCRINTR_FC) != 0) { 2705 if ((sc->sc_flags & NCR_WAITI) == 0) { 2706 printf("%s: MSGIN: unexpected FC bit: " 2707 "[intr %x, stat %x, step %x]\n", 2708 device_xname(sc->sc_dev), 2709 sc->sc_espintr, sc->sc_espstat, 2710 sc->sc_espstep); 2711 } 2712 sc->sc_flags &= ~NCR_WAITI; 2713 ncr53c9x_rdfifo(sc, 2714 (sc->sc_prevphase == sc->sc_phase) ? 2715 NCR_RDFIFO_CONTINUE : NCR_RDFIFO_START); 2716 ncr53c9x_msgin(sc); 2717 } else { 2718 printf("%s: MSGIN: weird bits: " 2719 "[intr %x, stat %x, step %x]\n", 2720 device_xname(sc->sc_dev), 2721 sc->sc_espintr, sc->sc_espstat, sc->sc_espstep); 2722 } 2723 sc->sc_prevphase = MESSAGE_IN_PHASE; 2724 goto shortcut; /* i.e. expect data to be ready */ 2725 2726 case COMMAND_PHASE: 2727 /* 2728 * Send the command block. Normally we don't see this 2729 * phase because the SEL_ATN command takes care of 2730 * all this. However, we end up here if either the 2731 * target or we wanted to exchange some more messages 2732 * first (e.g. to start negotiations). 2733 */ 2734 2735 NCR_PHASE(("COMMAND_PHASE 0x%02x (%d) ", 2736 ecb->cmd.cmd.opcode, ecb->clen)); 2737 if (NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF) { 2738 NCRCMD(sc, NCRCMD_FLUSH); 2739 #if 0 2740 DELAY(1); 2741 #endif 2742 } 2743 if (sc->sc_features & NCR_F_DMASELECT) { 2744 /* setup DMA transfer for command */ 2745 size = ecb->clen; 2746 sc->sc_cmdlen = size; 2747 sc->sc_cmdp = (void *)&ecb->cmd.cmd; 2748 NCRDMA_SETUP(sc, &sc->sc_cmdp, &sc->sc_cmdlen, 2749 0, &size); 2750 /* Program the SCSI counter */ 2751 NCR_SET_COUNT(sc, size); 2752 2753 /* load the count in */ 2754 NCRCMD(sc, NCRCMD_NOP | NCRCMD_DMA); 2755 2756 /* start the command transfer */ 2757 NCRCMD(sc, NCRCMD_TRANS | NCRCMD_DMA); 2758 NCRDMA_GO(sc); 2759 } else { 2760 ncr53c9x_wrfifo(sc, (uint8_t *)&ecb->cmd.cmd, 2761 ecb->clen); 2762 sc->sc_cmdlen = 0; 2763 NCRCMD(sc, NCRCMD_TRANS); 2764 } 2765 sc->sc_prevphase = COMMAND_PHASE; 2766 break; 2767 2768 case DATA_OUT_PHASE: 2769 NCR_PHASE(("DATA_OUT_PHASE [%ld] ",(long)sc->sc_dleft)); 2770 NCRCMD(sc, NCRCMD_FLUSH); 2771 size = uimin(sc->sc_dleft, sc->sc_maxxfer); 2772 NCRDMA_SETUP(sc, &sc->sc_dp, &sc->sc_dleft, 0, &size); 2773 sc->sc_prevphase = DATA_OUT_PHASE; 2774 goto setup_xfer; 2775 2776 case DATA_IN_PHASE: 2777 NCR_PHASE(("DATA_IN_PHASE ")); 2778 if (sc->sc_rev == NCR_VARIANT_ESP100) 2779 NCRCMD(sc, NCRCMD_FLUSH); 2780 size = uimin(sc->sc_dleft, sc->sc_maxxfer); 2781 NCRDMA_SETUP(sc, &sc->sc_dp, &sc->sc_dleft, 1, &size); 2782 sc->sc_prevphase = DATA_IN_PHASE; 2783 setup_xfer: 2784 /* Target returned to data phase: wipe "done" memory */ 2785 ecb->flags &= ~ECB_TENTATIVE_DONE; 2786 2787 /* Program the SCSI counter */ 2788 NCR_SET_COUNT(sc, size); 2789 2790 /* load the count in */ 2791 NCRCMD(sc, NCRCMD_NOP | NCRCMD_DMA); 2792 2793 /* 2794 * Note that if `size' is 0, we've already transceived 2795 * all the bytes we want but we're still in DATA PHASE. 2796 * Apparently, the device needs padding. Also, a 2797 * transfer size of 0 means "maximum" to the chip 2798 * DMA logic. 2799 */ 2800 NCRCMD(sc, 2801 (size == 0 ? NCRCMD_TRPAD : NCRCMD_TRANS) | NCRCMD_DMA); 2802 NCRDMA_GO(sc); 2803 goto out; 2804 2805 case STATUS_PHASE: 2806 NCR_PHASE(("STATUS_PHASE ")); 2807 sc->sc_flags |= NCR_ICCS; 2808 NCRCMD(sc, NCRCMD_ICCS); 2809 sc->sc_prevphase = STATUS_PHASE; 2810 goto shortcut; /* i.e. expect status results soon */ 2811 2812 case INVALID_PHASE: 2813 break; 2814 2815 default: 2816 printf("%s: unexpected bus phase; resetting\n", 2817 device_xname(sc->sc_dev)); 2818 goto reset; 2819 } 2820 2821 out: 2822 mutex_exit(&sc->sc_lock); 2823 return 1; 2824 2825 reset: 2826 ncr53c9x_init(sc, 1); 2827 goto out; 2828 2829 finish: 2830 ncr53c9x_done(sc, ecb); 2831 goto out; 2832 2833 sched: 2834 sc->sc_state = NCR_IDLE; 2835 ncr53c9x_sched(sc); 2836 goto out; 2837 2838 shortcut: 2839 /* 2840 * The idea is that many of the SCSI operations take very little 2841 * time, and going away and getting interrupted is too high an 2842 * overhead to pay. For example, selecting, sending a message 2843 * and command and then doing some work can be done in one "pass". 2844 * 2845 * The delay is a heuristic. It is 2 when at 20MHz, 2 at 25MHz and 1 2846 * at 40MHz. This needs testing. 2847 */ 2848 { 2849 struct timeval wait, cur; 2850 2851 microtime(&wait); 2852 wait.tv_usec += 50 / sc->sc_freq; 2853 if (wait.tv_usec > 1000000) { 2854 wait.tv_sec++; 2855 wait.tv_usec -= 1000000; 2856 } 2857 do { 2858 if (NCRDMA_ISINTR(sc)) 2859 goto again; 2860 microtime(&cur); 2861 } while (timercmp(&cur, &wait, <=)); 2862 } 2863 goto out; 2864 } 2865 2866 void 2867 ncr53c9x_abort(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb) 2868 { 2869 2870 /* 2 secs for the abort */ 2871 ecb->timeout = NCR_ABORT_TIMEOUT; 2872 ecb->flags |= ECB_ABORT; 2873 2874 if (ecb == sc->sc_nexus) { 2875 /* 2876 * If we're still selecting, the message will be scheduled 2877 * after selection is complete. 2878 */ 2879 if (sc->sc_state == NCR_CONNECTED) 2880 ncr53c9x_sched_msgout(SEND_ABORT); 2881 2882 /* 2883 * Reschedule timeout. 2884 */ 2885 callout_reset(&ecb->xs->xs_callout, mstohz(ecb->timeout), 2886 ncr53c9x_timeout, ecb); 2887 } else { 2888 /* 2889 * Just leave the command where it is. 2890 * XXX - what choice do we have but to reset the SCSI 2891 * eventually? 2892 */ 2893 if (sc->sc_state == NCR_IDLE) 2894 ncr53c9x_sched(sc); 2895 } 2896 } 2897 2898 void 2899 ncr53c9x_timeout(void *arg) 2900 { 2901 struct ncr53c9x_ecb *ecb = arg; 2902 struct scsipi_xfer *xs = ecb->xs; 2903 struct scsipi_periph *periph = xs->xs_periph; 2904 struct ncr53c9x_softc *sc; 2905 struct ncr53c9x_tinfo *ti; 2906 2907 sc = device_private(periph->periph_channel->chan_adapter->adapt_dev); 2908 ti = &sc->sc_tinfo[periph->periph_target]; 2909 2910 scsipi_printaddr(periph); 2911 printf("%s: timed out [ecb %p (flags 0x%x, dleft %x, stat %x)], " 2912 "<state %d, nexus %p, phase(l %x, c %x, p %x), resid %lx, " 2913 "msg(q %x,o %x) %s>", 2914 device_xname(sc->sc_dev), 2915 ecb, ecb->flags, ecb->dleft, ecb->stat, 2916 sc->sc_state, sc->sc_nexus, 2917 NCR_READ_REG(sc, NCR_STAT), 2918 sc->sc_phase, sc->sc_prevphase, 2919 (long)sc->sc_dleft, sc->sc_msgpriq, sc->sc_msgout, 2920 NCRDMA_ISACTIVE(sc) ? "DMA active" : ""); 2921 #if NCR53C9X_DEBUG > 1 2922 printf("TRACE: %s.", ecb->trace); 2923 #endif 2924 2925 mutex_enter(&sc->sc_lock); 2926 2927 if (ecb->flags & ECB_ABORT) { 2928 /* abort timed out */ 2929 printf(" AGAIN\n"); 2930 2931 ncr53c9x_init(sc, 1); 2932 } else { 2933 /* abort the operation that has timed out */ 2934 printf("\n"); 2935 xs->error = XS_TIMEOUT; 2936 ncr53c9x_abort(sc, ecb); 2937 2938 /* Disable sync mode if stuck in a data phase */ 2939 if (ecb == sc->sc_nexus && 2940 (ti->flags & T_SYNCMODE) != 0 && 2941 (sc->sc_phase & (MSGI | CDI)) == 0) { 2942 /* XXX ASYNC CALLBACK! */ 2943 scsipi_printaddr(periph); 2944 printf("sync negotiation disabled\n"); 2945 sc->sc_cfflags |= 2946 (1 << ((periph->periph_target & 7) + 8)); 2947 ncr53c9x_update_xfer_mode(sc, periph->periph_target); 2948 } 2949 } 2950 2951 mutex_exit(&sc->sc_lock); 2952 } 2953 2954 void 2955 ncr53c9x_watch(void *arg) 2956 { 2957 struct ncr53c9x_softc *sc = arg; 2958 struct ncr53c9x_tinfo *ti; 2959 struct ncr53c9x_linfo *li; 2960 int t; 2961 /* Delete any structures that have not been used in 10min. */ 2962 time_t old = time_second - (10 * 60); 2963 2964 mutex_enter(&sc->sc_lock); 2965 for (t = 0; t < sc->sc_ntarg; t++) { 2966 ti = &sc->sc_tinfo[t]; 2967 li = LIST_FIRST(&ti->luns); 2968 while (li) { 2969 if (li->last_used < old && 2970 li->untagged == NULL && 2971 li->used == 0) { 2972 if (li->lun < NCR_NLUN) 2973 ti->lun[li->lun] = NULL; 2974 LIST_REMOVE(li, link); 2975 free(li, M_DEVBUF); 2976 /* Restart the search at the beginning */ 2977 li = LIST_FIRST(&ti->luns); 2978 continue; 2979 } 2980 li = LIST_NEXT(li, link); 2981 } 2982 } 2983 mutex_exit(&sc->sc_lock); 2984 callout_reset(&sc->sc_watchdog, 60 * hz, ncr53c9x_watch, sc); 2985 } 2986
Indexes created Sat Sep 20 22:09:52 GMT 2025