Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/dev/ic/uha.c
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1 /* $NetBSD: uha.c,v 1.50 2022/09/25 18:43:32 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998 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 and by Jason R. Thorpe of the Numerical Aerospace 9 * Simulation Facility, NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Ported for use with the UltraStor 14f by Gary Close (gclose@wvnvms.wvnet.edu) 35 * Slight fixes to timeouts to run with the 34F 36 * Thanks to Julian Elischer for advice and help with this port. 37 * 38 * Originally written by Julian Elischer (julian@tfs.com) 39 * for TRW Financial Systems for use under the MACH(2.5) operating system. 40 * 41 * TRW Financial Systems, in accordance with their agreement with Carnegie 42 * Mellon University, makes this software available to CMU to distribute 43 * or use in any manner that they see fit as long as this message is kept with 44 * the software. For this reason TFS also grants any other persons or 45 * organisations permission to use or modify this software. 46 * 47 * TFS supplies this software to be publicly redistributed 48 * on the understanding that TFS is not responsible for the correct 49 * functioning of this software in any circumstances. 50 * 51 * commenced: Sun Sep 27 18:14:01 PDT 1992 52 * slight mod to make work with 34F as well: Wed Jun 2 18:05:48 WST 1993 53 */ 54 55 #include <sys/cdefs.h> 56 __KERNEL_RCSID(0, "$NetBSD: uha.c,v 1.50 2022/09/25 18:43:32 thorpej Exp $"); 57 58 #undef UHADEBUG 59 #ifdef DDB 60 #define integrate 61 #else 62 #define integrate static inline 63 #endif 64 65 #include <sys/param.h> 66 #include <sys/systm.h> 67 #include <sys/kernel.h> 68 #include <sys/errno.h> 69 #include <sys/ioctl.h> 70 #include <sys/device.h> 71 #include <sys/buf.h> 72 #include <sys/proc.h> 73 74 #include <sys/bus.h> 75 #include <sys/intr.h> 76 77 #include <dev/scsipi/scsi_all.h> 78 #include <dev/scsipi/scsipi_all.h> 79 #include <dev/scsipi/scsiconf.h> 80 81 #include <dev/ic/uhareg.h> 82 #include <dev/ic/uhavar.h> 83 84 #ifndef DDB 85 #define Debugger() panic("should call debugger here (uha.c)") 86 #endif /* ! DDB */ 87 88 #define UHA_MAXXFER ((UHA_NSEG - 1) << PGSHIFT) 89 90 integrate void uha_reset_mscp(struct uha_softc *, struct uha_mscp *); 91 void uha_free_mscp(struct uha_softc *, struct uha_mscp *); 92 integrate int uha_init_mscp(struct uha_softc *, struct uha_mscp *); 93 struct uha_mscp *uha_get_mscp(struct uha_softc *); 94 void uhaminphys(struct buf *); 95 void uha_scsipi_request(struct scsipi_channel *, scsipi_adapter_req_t, void *); 96 int uha_create_mscps(struct uha_softc *, struct uha_mscp *, int); 97 98 #define UHA_ABORT_TIMEOUT 2000 /* time to wait for abort (mSec) */ 99 100 /* 101 * Attach all the sub-devices we can find 102 */ 103 void 104 uha_attach(struct uha_softc *sc, struct uha_probe_data *upd) 105 { 106 struct scsipi_adapter *adapt = &sc->sc_adapter; 107 struct scsipi_channel *chan = &sc->sc_channel; 108 bus_dma_segment_t seg; 109 int i, error, rseg; 110 111 TAILQ_INIT(&sc->sc_free_mscp); 112 113 (sc->init)(sc); 114 115 /* 116 * Fill in the scsipi_adapter. 117 */ 118 memset(adapt, 0, sizeof(*adapt)); 119 adapt->adapt_dev = sc->sc_dev; 120 adapt->adapt_nchannels = 1; 121 /* adapt_openings initialized below */ 122 /* adapt_max_periph initialized below */ 123 adapt->adapt_request = uha_scsipi_request; 124 adapt->adapt_minphys = uhaminphys; 125 126 /* 127 * Fill in the scsipi_channel. 128 */ 129 memset(chan, 0, sizeof(*chan)); 130 chan->chan_adapter = adapt; 131 chan->chan_bustype = &scsi_bustype; 132 chan->chan_channel = 0; 133 chan->chan_ntargets = 8; 134 chan->chan_nluns = 8; 135 chan->chan_id = upd->sc_scsi_dev; 136 137 #define MSCPSIZE (UHA_MSCP_MAX * sizeof(struct uha_mscp)) 138 139 /* 140 * Allocate the MSCPs. 141 */ 142 if ((error = bus_dmamem_alloc(sc->sc_dmat, MSCPSIZE, 143 PAGE_SIZE, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) { 144 aprint_error_dev(sc->sc_dev, 145 "unable to allocate mscps, error = %d\n", error); 146 return; 147 } 148 if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, 149 MSCPSIZE, (void **)&sc->sc_mscps, 150 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 151 aprint_error_dev(sc->sc_dev, 152 "unable to map mscps, error = %d\n", error); 153 return; 154 } 155 156 /* 157 * Create and load the DMA map used for the mscps. 158 */ 159 if ((error = bus_dmamap_create(sc->sc_dmat, MSCPSIZE, 160 1, MSCPSIZE, 0, BUS_DMA_NOWAIT | sc->sc_dmaflags, 161 &sc->sc_dmamap_mscp)) != 0) { 162 aprint_error_dev(sc->sc_dev, 163 "unable to create mscp DMA map, error = %d\n", error); 164 return; 165 } 166 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_dmamap_mscp, 167 sc->sc_mscps, MSCPSIZE, NULL, BUS_DMA_NOWAIT)) != 0) { 168 aprint_error_dev(sc->sc_dev, 169 "unable to load mscp DMA map, error = %d\n", error); 170 return; 171 } 172 173 #undef MSCPSIZE 174 175 /* 176 * Initialize the mscps. 177 */ 178 i = uha_create_mscps(sc, sc->sc_mscps, UHA_MSCP_MAX); 179 if (i == 0) { 180 aprint_error_dev(sc->sc_dev, "unable to create mscps\n"); 181 return; 182 } else if (i != UHA_MSCP_MAX) { 183 aprint_error_dev(sc->sc_dev, 184 "WARNING: only %d of %d mscps created\n", i, UHA_MSCP_MAX); 185 } 186 187 adapt->adapt_openings = i; 188 adapt->adapt_max_periph = adapt->adapt_openings; 189 190 /* 191 * ask the adapter what subunits are present 192 */ 193 config_found(sc->sc_dev, &sc->sc_channel, scsiprint, CFARGS_NONE); 194 } 195 196 integrate void 197 uha_reset_mscp(struct uha_softc *sc, struct uha_mscp *mscp) 198 { 199 200 mscp->flags = 0; 201 } 202 203 /* 204 * A mscp (and hence a mbx-out) is put onto the free list. 205 */ 206 void 207 uha_free_mscp(struct uha_softc *sc, struct uha_mscp *mscp) 208 { 209 int s; 210 211 s = splbio(); 212 uha_reset_mscp(sc, mscp); 213 TAILQ_INSERT_HEAD(&sc->sc_free_mscp, mscp, chain); 214 splx(s); 215 } 216 217 integrate int 218 uha_init_mscp(struct uha_softc *sc, struct uha_mscp *mscp) 219 { 220 bus_dma_tag_t dmat = sc->sc_dmat; 221 int hashnum, error; 222 223 /* 224 * Create the DMA map for this MSCP. 225 */ 226 error = bus_dmamap_create(dmat, UHA_MAXXFER, UHA_NSEG, UHA_MAXXFER, 227 0, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW | sc->sc_dmaflags, 228 &mscp->dmamap_xfer); 229 if (error) { 230 aprint_error_dev(sc->sc_dev, 231 "can't create mscp DMA map, error = %d\n", error); 232 return (error); 233 } 234 235 /* 236 * put in the phystokv hash table 237 * Never gets taken out. 238 */ 239 mscp->hashkey = sc->sc_dmamap_mscp->dm_segs[0].ds_addr + 240 UHA_MSCP_OFF(mscp); 241 hashnum = MSCP_HASH(mscp->hashkey); 242 mscp->nexthash = sc->sc_mscphash[hashnum]; 243 sc->sc_mscphash[hashnum] = mscp; 244 uha_reset_mscp(sc, mscp); 245 return (0); 246 } 247 248 /* 249 * Create a set of MSCPs and add them to the free list. 250 */ 251 int 252 uha_create_mscps(struct uha_softc *sc, struct uha_mscp *mscpstore, int count) 253 { 254 struct uha_mscp *mscp; 255 int i, error; 256 257 memset(mscpstore, 0, sizeof(struct uha_mscp) * count); 258 for (i = 0; i < count; i++) { 259 mscp = &mscpstore[i]; 260 if ((error = uha_init_mscp(sc, mscp)) != 0) { 261 aprint_error_dev(sc->sc_dev, 262 "unable to initialize mscp, error = %d\n", error); 263 goto out; 264 } 265 TAILQ_INSERT_TAIL(&sc->sc_free_mscp, mscp, chain); 266 } 267 out: 268 return (i); 269 } 270 271 /* 272 * Get a free mscp 273 * 274 * If there are none, see if we can allocate a new one. If so, put it in the 275 * hash table too otherwise either return an error or sleep. 276 */ 277 struct uha_mscp * 278 uha_get_mscp(struct uha_softc *sc) 279 { 280 struct uha_mscp *mscp; 281 int s; 282 283 s = splbio(); 284 mscp = TAILQ_FIRST(&sc->sc_free_mscp); 285 if (mscp != NULL) { 286 TAILQ_REMOVE(&sc->sc_free_mscp, mscp, chain); 287 mscp->flags |= MSCP_ALLOC; 288 } 289 splx(s); 290 return (mscp); 291 } 292 293 /* 294 * given a physical address, find the mscp that it corresponds to. 295 */ 296 struct uha_mscp * 297 uha_mscp_phys_kv(struct uha_softc *sc, u_long mscp_phys) 298 { 299 int hashnum = MSCP_HASH(mscp_phys); 300 struct uha_mscp *mscp = sc->sc_mscphash[hashnum]; 301 302 while (mscp) { 303 if (mscp->hashkey == mscp_phys) 304 break; 305 mscp = mscp->nexthash; 306 } 307 return (mscp); 308 } 309 310 /* 311 * We have a mscp which has been processed by the adaptor, now we look to see 312 * how the operation went. 313 */ 314 void 315 uha_done(struct uha_softc *sc, struct uha_mscp *mscp) 316 { 317 bus_dma_tag_t dmat = sc->sc_dmat; 318 struct scsi_sense_data *s1, *s2; 319 struct scsipi_xfer *xs = mscp->xs; 320 321 SC_DEBUG(xs->xs_periph, SCSIPI_DB2, ("uha_done\n")); 322 323 bus_dmamap_sync(dmat, sc->sc_dmamap_mscp, 324 UHA_MSCP_OFF(mscp), sizeof(struct uha_mscp), 325 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 326 327 /* 328 * If we were a data transfer, unload the map that described 329 * the data buffer. 330 */ 331 if (xs->datalen) { 332 bus_dmamap_sync(dmat, mscp->dmamap_xfer, 0, 333 mscp->dmamap_xfer->dm_mapsize, 334 (xs->xs_control & XS_CTL_DATA_IN) ? BUS_DMASYNC_POSTREAD : 335 BUS_DMASYNC_POSTWRITE); 336 bus_dmamap_unload(dmat, mscp->dmamap_xfer); 337 } 338 339 /* 340 * Otherwise, put the results of the operation 341 * into the xfer and call whoever started it 342 */ 343 if ((mscp->flags & MSCP_ALLOC) == 0) { 344 aprint_error_dev(sc->sc_dev, "exiting ccb not allocated!\n"); 345 Debugger(); 346 return; 347 } 348 if (xs->error == XS_NOERROR) { 349 if (mscp->host_stat != UHA_NO_ERR) { 350 switch (mscp->host_stat) { 351 case UHA_SBUS_TIMEOUT: /* No response */ 352 xs->error = XS_SELTIMEOUT; 353 break; 354 default: /* Other scsi protocol messes */ 355 aprint_error_dev(sc->sc_dev, "host_stat %x\n", 356 mscp->host_stat); 357 xs->error = XS_DRIVER_STUFFUP; 358 } 359 } else if (mscp->target_stat != SCSI_OK) { 360 switch (mscp->target_stat) { 361 case SCSI_CHECK: 362 s1 = &mscp->mscp_sense; 363 s2 = &xs->sense.scsi_sense; 364 *s2 = *s1; 365 xs->error = XS_SENSE; 366 break; 367 case SCSI_BUSY: 368 xs->error = XS_BUSY; 369 break; 370 default: 371 aprint_error_dev(sc->sc_dev, 372 "target_stat %x\n", mscp->target_stat); 373 xs->error = XS_DRIVER_STUFFUP; 374 } 375 } else 376 xs->resid = 0; 377 } 378 uha_free_mscp(sc, mscp); 379 scsipi_done(xs); 380 } 381 382 void 383 uhaminphys(struct buf *bp) 384 { 385 386 if (bp->b_bcount > UHA_MAXXFER) 387 bp->b_bcount = UHA_MAXXFER; 388 minphys(bp); 389 } 390 391 /* 392 * start a scsi operation given the command and the data address. Also 393 * needs the unit, target and lu. 394 */ 395 396 void 397 uha_scsipi_request(struct scsipi_channel *chan, scsipi_adapter_req_t req, 398 void *arg) 399 { 400 struct scsipi_xfer *xs; 401 struct scsipi_periph *periph; 402 struct uha_softc *sc = device_private(chan->chan_adapter->adapt_dev); 403 bus_dma_tag_t dmat = sc->sc_dmat; 404 struct uha_mscp *mscp; 405 int error, seg, flags, s; 406 407 408 switch (req) { 409 case ADAPTER_REQ_RUN_XFER: 410 xs = arg; 411 periph = xs->xs_periph; 412 flags = xs->xs_control; 413 414 SC_DEBUG(periph, SCSIPI_DB2, ("uha_scsipi_request\n")); 415 416 /* Get an MSCP to use. */ 417 mscp = uha_get_mscp(sc); 418 #ifdef DIAGNOSTIC 419 /* 420 * This should never happen as we track the resources 421 * in the mid-layer. 422 */ 423 if (mscp == NULL) { 424 scsipi_printaddr(periph); 425 printf("unable to allocate mscp\n"); 426 panic("uha_scsipi_request"); 427 } 428 #endif 429 430 mscp->xs = xs; 431 mscp->timeout = xs->timeout; 432 433 /* 434 * Put all the arguments for the xfer in the mscp 435 */ 436 if (flags & XS_CTL_RESET) { 437 mscp->opcode = UHA_SDR; 438 mscp->ca = 0x01; 439 } else { 440 if (xs->cmdlen > sizeof(mscp->scsi_cmd)) { 441 aprint_error_dev(sc->sc_dev, 442 "cmdlen %d too large for MSCP\n", 443 xs->cmdlen); 444 xs->error = XS_DRIVER_STUFFUP; 445 goto out_bad; 446 } 447 mscp->opcode = UHA_TSP; 448 /* XXX Not for tapes. */ 449 mscp->ca = 0x01; 450 memcpy(&mscp->scsi_cmd, xs->cmd, mscp->scsi_cmd_length); 451 } 452 mscp->xdir = UHA_SDET; 453 mscp->dcn = 0x00; 454 mscp->chan = 0x00; 455 mscp->target = periph->periph_target; 456 mscp->lun = periph->periph_lun; 457 mscp->scsi_cmd_length = xs->cmdlen; 458 mscp->sense_ptr = sc->sc_dmamap_mscp->dm_segs[0].ds_addr + 459 UHA_MSCP_OFF(mscp) + offsetof(struct uha_mscp, mscp_sense); 460 mscp->req_sense_length = sizeof(mscp->mscp_sense); 461 mscp->host_stat = 0x00; 462 mscp->target_stat = 0x00; 463 464 if (xs->datalen) { 465 seg = 0; 466 #ifdef TFS 467 if (flags & SCSI_DATA_UIO) { 468 error = bus_dmamap_load_uio(dmat, 469 mscp->dmamap_xfer, (struct uio *)xs->data, 470 ((flags & XS_CTL_NOSLEEP) ? BUS_DMA_NOWAIT : 471 BUS_DMA_WAITOK) | BUS_DMA_STREAMING | 472 ((flags & XS_CTL_DATA_IN) ? BUS_DMA_READ : 473 BUS_DMA_WRITE)); 474 } else 475 #endif /*TFS */ 476 { 477 error = bus_dmamap_load(dmat, 478 mscp->dmamap_xfer, xs->data, xs->datalen, 479 NULL, 480 ((flags & XS_CTL_NOSLEEP) ? BUS_DMA_NOWAIT : 481 BUS_DMA_WAITOK) | BUS_DMA_STREAMING | 482 ((flags & XS_CTL_DATA_IN) ? BUS_DMA_READ : 483 BUS_DMA_WRITE)); 484 } 485 486 switch (error) { 487 case 0: 488 break; 489 490 case ENOMEM: 491 case EAGAIN: 492 xs->error = XS_RESOURCE_SHORTAGE; 493 goto out_bad; 494 495 default: 496 xs->error = XS_DRIVER_STUFFUP; 497 aprint_error_dev(sc->sc_dev, 498 "error %d loading DMA map\n", error); 499 out_bad: 500 uha_free_mscp(sc, mscp); 501 scsipi_done(xs); 502 return; 503 } 504 505 bus_dmamap_sync(dmat, mscp->dmamap_xfer, 0, 506 mscp->dmamap_xfer->dm_mapsize, 507 (flags & XS_CTL_DATA_IN) ? BUS_DMASYNC_PREREAD : 508 BUS_DMASYNC_PREWRITE); 509 510 /* 511 * Load the hardware scatter/gather map with the 512 * contents of the DMA map. 513 */ 514 for (seg = 0; 515 seg < mscp->dmamap_xfer->dm_nsegs; seg++) { 516 mscp->uha_dma[seg].seg_addr = 517 mscp->dmamap_xfer->dm_segs[seg].ds_addr; 518 mscp->uha_dma[seg].seg_len = 519 mscp->dmamap_xfer->dm_segs[seg].ds_len; 520 } 521 522 mscp->data_addr = 523 sc->sc_dmamap_mscp->dm_segs[0].ds_addr + 524 UHA_MSCP_OFF(mscp) + offsetof(struct uha_mscp, 525 uha_dma); 526 mscp->data_length = xs->datalen; 527 mscp->sgth = 0x01; 528 mscp->sg_num = seg; 529 } else { /* No data xfer, use non S/G values */ 530 mscp->data_addr = (physaddr)0; 531 mscp->data_length = 0; 532 mscp->sgth = 0x00; 533 mscp->sg_num = 0; 534 } 535 mscp->link_id = 0; 536 mscp->link_addr = (physaddr)0; 537 538 bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap_mscp, 539 UHA_MSCP_OFF(mscp), sizeof(struct uha_mscp), 540 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 541 542 s = splbio(); 543 (sc->start_mbox)(sc, mscp); 544 splx(s); 545 546 if ((flags & XS_CTL_POLL) == 0) 547 return; 548 549 /* 550 * If we can't use interrupts, poll on completion 551 */ 552 if ((sc->poll)(sc, xs, mscp->timeout)) { 553 uha_timeout(mscp); 554 if ((sc->poll)(sc, xs, mscp->timeout)) 555 uha_timeout(mscp); 556 } 557 return; 558 559 case ADAPTER_REQ_GROW_RESOURCES: 560 /* XXX Not supported. */ 561 return; 562 563 case ADAPTER_REQ_SET_XFER_MODE: 564 /* 565 * We can't really do this (the UltraStor controllers 566 * have their own config). 567 * 568 * XXX How do we query the config? 569 */ 570 return; 571 } 572 } 573 void 574 uha_timeout(void *arg) 575 { 576 struct uha_mscp *mscp = arg; 577 struct scsipi_xfer *xs = mscp->xs; 578 struct scsipi_periph *periph = xs->xs_periph; 579 struct uha_softc *sc = 580 device_private(periph->periph_channel->chan_adapter->adapt_dev); 581 int s; 582 583 scsipi_printaddr(periph); 584 printf("timed out"); 585 586 s = splbio(); 587 588 if (mscp->flags & MSCP_ABORT) { 589 /* abort timed out */ 590 printf(" AGAIN\n"); 591 /* XXX Must reset! */ 592 } else { 593 /* abort the operation that has timed out */ 594 printf("\n"); 595 mscp->xs->error = XS_TIMEOUT; 596 mscp->timeout = UHA_ABORT_TIMEOUT; 597 mscp->flags |= MSCP_ABORT; 598 (sc->start_mbox)(sc, mscp); 599 } 600 601 splx(s); 602 }
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