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 1.42 2008/04/28 20:23:51 martin 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 1.42 2008/04/28 20:23:51 martin 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/malloc.h> 72 #include <sys/buf.h> 73 #include <sys/proc.h> 74 #include <sys/user.h> 75 76 #include <uvm/uvm_extern.h> 77 78 #include <sys/bus.h> 79 #include <sys/intr.h> 80 81 #include <dev/scsipi/scsi_all.h> 82 #include <dev/scsipi/scsipi_all.h> 83 #include <dev/scsipi/scsiconf.h> 84 85 #include <dev/ic/uhareg.h> 86 #include <dev/ic/uhavar.h> 87 88 #ifndef DDB 89 #define Debugger() panic("should call debugger here (uha.c)") 90 #endif /* ! DDB */ 91 92 #define UHA_MAXXFER ((UHA_NSEG - 1) << PGSHIFT) 93 94 integrate void uha_reset_mscp(struct uha_softc *, struct uha_mscp *); 95 void uha_free_mscp(struct uha_softc *, struct uha_mscp *); 96 integrate int uha_init_mscp(struct uha_softc *, struct uha_mscp *); 97 struct uha_mscp *uha_get_mscp(struct uha_softc *); 98 void uhaminphys(struct buf *); 99 void uha_scsipi_request(struct scsipi_channel *, scsipi_adapter_req_t, void *); 100 int uha_create_mscps(struct uha_softc *, struct uha_mscp *, int); 101 102 #define UHA_ABORT_TIMEOUT 2000 /* time to wait for abort (mSec) */ 103 104 /* 105 * Attach all the sub-devices we can find 106 */ 107 void 108 uha_attach(sc, upd) 109 struct uha_softc *sc; 110 struct uha_probe_data *upd; 111 { 112 struct scsipi_adapter *adapt = &sc->sc_adapter; 113 struct scsipi_channel *chan = &sc->sc_channel; 114 bus_dma_segment_t seg; 115 int i, error, rseg; 116 117 TAILQ_INIT(&sc->sc_free_mscp); 118 119 (sc->init)(sc); 120 121 /* 122 * Fill in the scsipi_adapter. 123 */ 124 memset(adapt, 0, sizeof(*adapt)); 125 adapt->adapt_dev = &sc->sc_dev; 126 adapt->adapt_nchannels = 1; 127 /* adapt_openings initialized below */ 128 /* adapt_max_periph initialized below */ 129 adapt->adapt_request = uha_scsipi_request; 130 adapt->adapt_minphys = uhaminphys; 131 132 /* 133 * Fill in the scsipi_channel. 134 */ 135 memset(chan, 0, sizeof(*chan)); 136 chan->chan_adapter = adapt; 137 chan->chan_bustype = &scsi_bustype; 138 chan->chan_channel = 0; 139 chan->chan_ntargets = 8; 140 chan->chan_nluns = 8; 141 chan->chan_id = upd->sc_scsi_dev; 142 143 #define MSCPSIZE (UHA_MSCP_MAX * sizeof(struct uha_mscp)) 144 145 /* 146 * Allocate the MSCPs. 147 */ 148 if ((error = bus_dmamem_alloc(sc->sc_dmat, MSCPSIZE, 149 PAGE_SIZE, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) { 150 aprint_error_dev(&sc->sc_dev, "unable to allocate mscps, error = %d\n", 151 error); 152 return; 153 } 154 if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, 155 MSCPSIZE, (void **)&sc->sc_mscps, 156 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 157 aprint_error_dev(&sc->sc_dev, "unable to map mscps, error = %d\n", 158 error); 159 return; 160 } 161 162 /* 163 * Create and load the DMA map used for the mscps. 164 */ 165 if ((error = bus_dmamap_create(sc->sc_dmat, MSCPSIZE, 166 1, MSCPSIZE, 0, BUS_DMA_NOWAIT | sc->sc_dmaflags, 167 &sc->sc_dmamap_mscp)) != 0) { 168 aprint_error_dev(&sc->sc_dev, "unable to create mscp DMA map, error = %d\n", 169 error); 170 return; 171 } 172 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_dmamap_mscp, 173 sc->sc_mscps, MSCPSIZE, NULL, BUS_DMA_NOWAIT)) != 0) { 174 aprint_error_dev(&sc->sc_dev, "unable to load mscp DMA map, error = %d\n", 175 error); 176 return; 177 } 178 179 #undef MSCPSIZE 180 181 /* 182 * Initialize the mscps. 183 */ 184 i = uha_create_mscps(sc, sc->sc_mscps, UHA_MSCP_MAX); 185 if (i == 0) { 186 aprint_error_dev(&sc->sc_dev, "unable to create mscps\n"); 187 return; 188 } else if (i != UHA_MSCP_MAX) { 189 aprint_error_dev(&sc->sc_dev, "WARNING: only %d of %d mscps created\n", 190 i, UHA_MSCP_MAX); 191 } 192 193 adapt->adapt_openings = i; 194 adapt->adapt_max_periph = adapt->adapt_openings; 195 196 /* 197 * ask the adapter what subunits are present 198 */ 199 config_found(&sc->sc_dev, &sc->sc_channel, scsiprint); 200 } 201 202 integrate void 203 uha_reset_mscp(struct uha_softc *sc, struct uha_mscp *mscp) 204 { 205 206 mscp->flags = 0; 207 } 208 209 /* 210 * A mscp (and hence a mbx-out) is put onto the free list. 211 */ 212 void 213 uha_free_mscp(sc, mscp) 214 struct uha_softc *sc; 215 struct uha_mscp *mscp; 216 { 217 int s; 218 219 s = splbio(); 220 uha_reset_mscp(sc, mscp); 221 TAILQ_INSERT_HEAD(&sc->sc_free_mscp, mscp, chain); 222 splx(s); 223 } 224 225 integrate int 226 uha_init_mscp(sc, mscp) 227 struct uha_softc *sc; 228 struct uha_mscp *mscp; 229 { 230 bus_dma_tag_t dmat = sc->sc_dmat; 231 int hashnum, error; 232 233 /* 234 * Create the DMA map for this MSCP. 235 */ 236 error = bus_dmamap_create(dmat, UHA_MAXXFER, UHA_NSEG, UHA_MAXXFER, 237 0, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW | sc->sc_dmaflags, 238 &mscp->dmamap_xfer); 239 if (error) { 240 aprint_error_dev(&sc->sc_dev, "can't create mscp DMA map, error = %d\n", 241 error); 242 return (error); 243 } 244 245 /* 246 * put in the phystokv hash table 247 * Never gets taken out. 248 */ 249 mscp->hashkey = sc->sc_dmamap_mscp->dm_segs[0].ds_addr + 250 UHA_MSCP_OFF(mscp); 251 hashnum = MSCP_HASH(mscp->hashkey); 252 mscp->nexthash = sc->sc_mscphash[hashnum]; 253 sc->sc_mscphash[hashnum] = mscp; 254 uha_reset_mscp(sc, mscp); 255 return (0); 256 } 257 258 /* 259 * Create a set of MSCPs and add them to the free list. 260 */ 261 int 262 uha_create_mscps(sc, mscpstore, count) 263 struct uha_softc *sc; 264 struct uha_mscp *mscpstore; 265 int count; 266 { 267 struct uha_mscp *mscp; 268 int i, error; 269 270 memset(mscpstore, 0, sizeof(struct uha_mscp) * count); 271 for (i = 0; i < count; i++) { 272 mscp = &mscpstore[i]; 273 if ((error = uha_init_mscp(sc, mscp)) != 0) { 274 aprint_error_dev(&sc->sc_dev, "unable to initialize mscp, error = %d\n", 275 error); 276 goto out; 277 } 278 TAILQ_INSERT_TAIL(&sc->sc_free_mscp, mscp, chain); 279 } 280 out: 281 return (i); 282 } 283 284 /* 285 * Get a free mscp 286 * 287 * If there are none, see if we can allocate a new one. If so, put it in the 288 * hash table too otherwise either return an error or sleep. 289 */ 290 struct uha_mscp * 291 uha_get_mscp(sc) 292 struct uha_softc *sc; 293 { 294 struct uha_mscp *mscp; 295 int s; 296 297 s = splbio(); 298 mscp = TAILQ_FIRST(&sc->sc_free_mscp); 299 if (mscp != NULL) { 300 TAILQ_REMOVE(&sc->sc_free_mscp, mscp, chain); 301 mscp->flags |= MSCP_ALLOC; 302 } 303 splx(s); 304 return (mscp); 305 } 306 307 /* 308 * given a physical address, find the mscp that it corresponds to. 309 */ 310 struct uha_mscp * 311 uha_mscp_phys_kv(sc, mscp_phys) 312 struct uha_softc *sc; 313 u_long mscp_phys; 314 { 315 int hashnum = MSCP_HASH(mscp_phys); 316 struct uha_mscp *mscp = sc->sc_mscphash[hashnum]; 317 318 while (mscp) { 319 if (mscp->hashkey == mscp_phys) 320 break; 321 mscp = mscp->nexthash; 322 } 323 return (mscp); 324 } 325 326 /* 327 * We have a mscp which has been processed by the adaptor, now we look to see 328 * how the operation went. 329 */ 330 void 331 uha_done(sc, mscp) 332 struct uha_softc *sc; 333 struct uha_mscp *mscp; 334 { 335 bus_dma_tag_t dmat = sc->sc_dmat; 336 struct scsi_sense_data *s1, *s2; 337 struct scsipi_xfer *xs = mscp->xs; 338 339 SC_DEBUG(xs->xs_periph, SCSIPI_DB2, ("uha_done\n")); 340 341 bus_dmamap_sync(dmat, sc->sc_dmamap_mscp, 342 UHA_MSCP_OFF(mscp), sizeof(struct uha_mscp), 343 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 344 345 /* 346 * If we were a data transfer, unload the map that described 347 * the data buffer. 348 */ 349 if (xs->datalen) { 350 bus_dmamap_sync(dmat, mscp->dmamap_xfer, 0, 351 mscp->dmamap_xfer->dm_mapsize, 352 (xs->xs_control & XS_CTL_DATA_IN) ? BUS_DMASYNC_POSTREAD : 353 BUS_DMASYNC_POSTWRITE); 354 bus_dmamap_unload(dmat, mscp->dmamap_xfer); 355 } 356 357 /* 358 * Otherwise, put the results of the operation 359 * into the xfer and call whoever started it 360 */ 361 if ((mscp->flags & MSCP_ALLOC) == 0) { 362 aprint_error_dev(&sc->sc_dev, "exiting ccb not allocated!\n"); 363 Debugger(); 364 return; 365 } 366 if (xs->error == XS_NOERROR) { 367 if (mscp->host_stat != UHA_NO_ERR) { 368 switch (mscp->host_stat) { 369 case UHA_SBUS_TIMEOUT: /* No response */ 370 xs->error = XS_SELTIMEOUT; 371 break; 372 default: /* Other scsi protocol messes */ 373 aprint_error_dev(&sc->sc_dev, "host_stat %x\n", 374 mscp->host_stat); 375 xs->error = XS_DRIVER_STUFFUP; 376 } 377 } else if (mscp->target_stat != SCSI_OK) { 378 switch (mscp->target_stat) { 379 case SCSI_CHECK: 380 s1 = &mscp->mscp_sense; 381 s2 = &xs->sense.scsi_sense; 382 *s2 = *s1; 383 xs->error = XS_SENSE; 384 break; 385 case SCSI_BUSY: 386 xs->error = XS_BUSY; 387 break; 388 default: 389 aprint_error_dev(&sc->sc_dev, "target_stat %x\n", 390 mscp->target_stat); 391 xs->error = XS_DRIVER_STUFFUP; 392 } 393 } else 394 xs->resid = 0; 395 } 396 uha_free_mscp(sc, mscp); 397 scsipi_done(xs); 398 } 399 400 void 401 uhaminphys(bp) 402 struct buf *bp; 403 { 404 405 if (bp->b_bcount > UHA_MAXXFER) 406 bp->b_bcount = UHA_MAXXFER; 407 minphys(bp); 408 } 409 410 /* 411 * start a scsi operation given the command and the data address. Also 412 * needs the unit, target and lu. 413 */ 414 415 void 416 uha_scsipi_request(chan, req, arg) 417 struct scsipi_channel *chan; 418 scsipi_adapter_req_t req; 419 void *arg; 420 { 421 struct scsipi_xfer *xs; 422 struct scsipi_periph *periph; 423 struct uha_softc *sc = (void *)chan->chan_adapter->adapt_dev; 424 bus_dma_tag_t dmat = sc->sc_dmat; 425 struct uha_mscp *mscp; 426 int error, seg, flags, s; 427 428 429 switch (req) { 430 case ADAPTER_REQ_RUN_XFER: 431 xs = arg; 432 periph = xs->xs_periph; 433 flags = xs->xs_control; 434 435 SC_DEBUG(periph, SCSIPI_DB2, ("uha_scsipi_request\n")); 436 437 /* Get an MSCP to use. */ 438 mscp = uha_get_mscp(sc); 439 #ifdef DIAGNOSTIC 440 /* 441 * This should never happen as we track the resources 442 * in the mid-layer. 443 */ 444 if (mscp == NULL) { 445 scsipi_printaddr(periph); 446 printf("unable to allocate mscp\n"); 447 panic("uha_scsipi_request"); 448 } 449 #endif 450 451 mscp->xs = xs; 452 mscp->timeout = xs->timeout; 453 454 /* 455 * Put all the arguments for the xfer in the mscp 456 */ 457 if (flags & XS_CTL_RESET) { 458 mscp->opcode = UHA_SDR; 459 mscp->ca = 0x01; 460 } else { 461 if (xs->cmdlen > sizeof(mscp->scsi_cmd)) { 462 aprint_error_dev(&sc->sc_dev, "cmdlen %d too large for MSCP\n", 463 xs->cmdlen); 464 xs->error = XS_DRIVER_STUFFUP; 465 goto out_bad; 466 } 467 mscp->opcode = UHA_TSP; 468 /* XXX Not for tapes. */ 469 mscp->ca = 0x01; 470 memcpy(&mscp->scsi_cmd, xs->cmd, mscp->scsi_cmd_length); 471 } 472 mscp->xdir = UHA_SDET; 473 mscp->dcn = 0x00; 474 mscp->chan = 0x00; 475 mscp->target = periph->periph_target; 476 mscp->lun = periph->periph_lun; 477 mscp->scsi_cmd_length = xs->cmdlen; 478 mscp->sense_ptr = sc->sc_dmamap_mscp->dm_segs[0].ds_addr + 479 UHA_MSCP_OFF(mscp) + offsetof(struct uha_mscp, mscp_sense); 480 mscp->req_sense_length = sizeof(mscp->mscp_sense); 481 mscp->host_stat = 0x00; 482 mscp->target_stat = 0x00; 483 484 if (xs->datalen) { 485 seg = 0; 486 #ifdef TFS 487 if (flags & SCSI_DATA_UIO) { 488 error = bus_dmamap_load_uio(dmat, 489 mscp->dmamap_xfer, (struct uio *)xs->data, 490 ((flags & XS_CTL_NOSLEEP) ? BUS_DMA_NOWAIT : 491 BUS_DMA_WAITOK) | BUS_DMA_STREAMING | 492 ((flags & XS_CTL_DATA_IN) ? BUS_DMA_READ : 493 BUS_DMA_WRITE)); 494 } else 495 #endif /*TFS */ 496 { 497 error = bus_dmamap_load(dmat, 498 mscp->dmamap_xfer, xs->data, xs->datalen, 499 NULL, 500 ((flags & XS_CTL_NOSLEEP) ? BUS_DMA_NOWAIT : 501 BUS_DMA_WAITOK) | BUS_DMA_STREAMING | 502 ((flags & XS_CTL_DATA_IN) ? BUS_DMA_READ : 503 BUS_DMA_WRITE)); 504 } 505 506 switch (error) { 507 case 0: 508 break; 509 510 case ENOMEM: 511 case EAGAIN: 512 xs->error = XS_RESOURCE_SHORTAGE; 513 goto out_bad; 514 515 default: 516 xs->error = XS_DRIVER_STUFFUP; 517 aprint_error_dev(&sc->sc_dev, "error %d loading DMA map\n", 518 error); 519 out_bad: 520 uha_free_mscp(sc, mscp); 521 scsipi_done(xs); 522 return; 523 } 524 525 bus_dmamap_sync(dmat, mscp->dmamap_xfer, 0, 526 mscp->dmamap_xfer->dm_mapsize, 527 (flags & XS_CTL_DATA_IN) ? BUS_DMASYNC_PREREAD : 528 BUS_DMASYNC_PREWRITE); 529 530 /* 531 * Load the hardware scatter/gather map with the 532 * contents of the DMA map. 533 */ 534 for (seg = 0; 535 seg < mscp->dmamap_xfer->dm_nsegs; seg++) { 536 mscp->uha_dma[seg].seg_addr = 537 mscp->dmamap_xfer->dm_segs[seg].ds_addr; 538 mscp->uha_dma[seg].seg_len = 539 mscp->dmamap_xfer->dm_segs[seg].ds_len; 540 } 541 542 mscp->data_addr = 543 sc->sc_dmamap_mscp->dm_segs[0].ds_addr + 544 UHA_MSCP_OFF(mscp) + offsetof(struct uha_mscp, 545 uha_dma); 546 mscp->data_length = xs->datalen; 547 mscp->sgth = 0x01; 548 mscp->sg_num = seg; 549 } else { /* No data xfer, use non S/G values */ 550 mscp->data_addr = (physaddr)0; 551 mscp->data_length = 0; 552 mscp->sgth = 0x00; 553 mscp->sg_num = 0; 554 } 555 mscp->link_id = 0; 556 mscp->link_addr = (physaddr)0; 557 558 bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap_mscp, 559 UHA_MSCP_OFF(mscp), sizeof(struct uha_mscp), 560 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 561 562 s = splbio(); 563 (sc->start_mbox)(sc, mscp); 564 splx(s); 565 566 if ((flags & XS_CTL_POLL) == 0) 567 return; 568 569 /* 570 * If we can't use interrupts, poll on completion 571 */ 572 if ((sc->poll)(sc, xs, mscp->timeout)) { 573 uha_timeout(mscp); 574 if ((sc->poll)(sc, xs, mscp->timeout)) 575 uha_timeout(mscp); 576 } 577 return; 578 579 case ADAPTER_REQ_GROW_RESOURCES: 580 /* XXX Not supported. */ 581 return; 582 583 case ADAPTER_REQ_SET_XFER_MODE: 584 /* 585 * We can't really do this (the UltraStor controllers 586 * have their own config). 587 * 588 * XXX How do we query the config? 589 */ 590 return; 591 } 592 } 593 void 594 uha_timeout(arg) 595 void *arg; 596 { 597 struct uha_mscp *mscp = arg; 598 struct scsipi_xfer *xs = mscp->xs; 599 struct scsipi_periph *periph = xs->xs_periph; 600 struct uha_softc *sc = 601 (void *)periph->periph_channel->chan_adapter->adapt_dev; 602 int s; 603 604 scsipi_printaddr(periph); 605 printf("timed out"); 606 607 s = splbio(); 608 609 if (mscp->flags & MSCP_ABORT) { 610 /* abort timed out */ 611 printf(" AGAIN\n"); 612 /* XXX Must reset! */ 613 } else { 614 /* abort the operation that has timed out */ 615 printf("\n"); 616 mscp->xs->error = XS_TIMEOUT; 617 mscp->timeout = UHA_ABORT_TIMEOUT; 618 mscp->flags |= MSCP_ABORT; 619 (sc->start_mbox)(sc, mscp); 620 } 621 622 splx(s); 623 }
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