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 1.35 2005/02/21 00:29:07 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 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * Ported for use with the UltraStor 14f by Gary Close (gclose@wvnvms.wvnet.edu) 42 * Slight fixes to timeouts to run with the 34F 43 * Thanks to Julian Elischer for advice and help with this port. 44 * 45 * Originally written by Julian Elischer (julian@tfs.com) 46 * for TRW Financial Systems for use under the MACH(2.5) operating system. 47 * 48 * TRW Financial Systems, in accordance with their agreement with Carnegie 49 * Mellon University, makes this software available to CMU to distribute 50 * or use in any manner that they see fit as long as this message is kept with 51 * the software. For this reason TFS also grants any other persons or 52 * organisations permission to use or modify this software. 53 * 54 * TFS supplies this software to be publicly redistributed 55 * on the understanding that TFS is not responsible for the correct 56 * functioning of this software in any circumstances. 57 * 58 * commenced: Sun Sep 27 18:14:01 PDT 1992 59 * slight mod to make work with 34F as well: Wed Jun 2 18:05:48 WST 1993 60 */ 61 62 #include <sys/cdefs.h> 63 __KERNEL_RCSID(0, "$NetBSD: uha.c,v 1.35 2005/02/21 00:29:07 thorpej Exp $"); 64 65 #undef UHADEBUG 66 #ifdef DDB 67 #define integrate 68 #else 69 #define integrate static inline 70 #endif 71 72 #include <sys/param.h> 73 #include <sys/systm.h> 74 #include <sys/kernel.h> 75 #include <sys/errno.h> 76 #include <sys/ioctl.h> 77 #include <sys/device.h> 78 #include <sys/malloc.h> 79 #include <sys/buf.h> 80 #include <sys/proc.h> 81 #include <sys/user.h> 82 83 #include <uvm/uvm_extern.h> 84 85 #include <machine/bus.h> 86 #include <machine/intr.h> 87 88 #include <dev/scsipi/scsi_all.h> 89 #include <dev/scsipi/scsipi_all.h> 90 #include <dev/scsipi/scsiconf.h> 91 92 #include <dev/ic/uhareg.h> 93 #include <dev/ic/uhavar.h> 94 95 #ifndef DDB 96 #define Debugger() panic("should call debugger here (uha.c)") 97 #endif /* ! DDB */ 98 99 #define UHA_MAXXFER ((UHA_NSEG - 1) << PGSHIFT) 100 101 integrate void uha_reset_mscp(struct uha_softc *, struct uha_mscp *); 102 void uha_free_mscp(struct uha_softc *, struct uha_mscp *); 103 integrate int uha_init_mscp(struct uha_softc *, struct uha_mscp *); 104 struct uha_mscp *uha_get_mscp(struct uha_softc *); 105 void uhaminphys(struct buf *); 106 void uha_scsipi_request(struct scsipi_channel *, scsipi_adapter_req_t, void *); 107 int uha_create_mscps(struct uha_softc *, struct uha_mscp *, int); 108 109 #define UHA_ABORT_TIMEOUT 2000 /* time to wait for abort (mSec) */ 110 111 /* 112 * Attach all the sub-devices we can find 113 */ 114 void 115 uha_attach(sc, upd) 116 struct uha_softc *sc; 117 struct uha_probe_data *upd; 118 { 119 struct scsipi_adapter *adapt = &sc->sc_adapter; 120 struct scsipi_channel *chan = &sc->sc_channel; 121 bus_dma_segment_t seg; 122 int i, error, rseg; 123 124 TAILQ_INIT(&sc->sc_free_mscp); 125 126 (sc->init)(sc); 127 128 /* 129 * Fill in the scsipi_adapter. 130 */ 131 memset(adapt, 0, sizeof(*adapt)); 132 adapt->adapt_dev = &sc->sc_dev; 133 adapt->adapt_nchannels = 1; 134 /* adapt_openings initialized below */ 135 /* adapt_max_periph initialized below */ 136 adapt->adapt_request = uha_scsipi_request; 137 adapt->adapt_minphys = uhaminphys; 138 139 /* 140 * Fill in the scsipi_channel. 141 */ 142 memset(chan, 0, sizeof(*chan)); 143 chan->chan_adapter = adapt; 144 chan->chan_bustype = &scsi_bustype; 145 chan->chan_channel = 0; 146 chan->chan_ntargets = 8; 147 chan->chan_nluns = 8; 148 chan->chan_id = upd->sc_scsi_dev; 149 150 #define MSCPSIZE (UHA_MSCP_MAX * sizeof(struct uha_mscp)) 151 152 /* 153 * Allocate the MSCPs. 154 */ 155 if ((error = bus_dmamem_alloc(sc->sc_dmat, MSCPSIZE, 156 PAGE_SIZE, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) { 157 printf("%s: unable to allocate mscps, error = %d\n", 158 sc->sc_dev.dv_xname, error); 159 return; 160 } 161 if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, 162 MSCPSIZE, (caddr_t *)&sc->sc_mscps, 163 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 164 printf("%s: unable to map mscps, error = %d\n", 165 sc->sc_dev.dv_xname, error); 166 return; 167 } 168 169 /* 170 * Create and load the DMA map used for the mscps. 171 */ 172 if ((error = bus_dmamap_create(sc->sc_dmat, MSCPSIZE, 173 1, MSCPSIZE, 0, BUS_DMA_NOWAIT | sc->sc_dmaflags, 174 &sc->sc_dmamap_mscp)) != 0) { 175 printf("%s: unable to create mscp DMA map, error = %d\n", 176 sc->sc_dev.dv_xname, error); 177 return; 178 } 179 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_dmamap_mscp, 180 sc->sc_mscps, MSCPSIZE, NULL, BUS_DMA_NOWAIT)) != 0) { 181 printf("%s: unable to load mscp DMA map, error = %d\n", 182 sc->sc_dev.dv_xname, error); 183 return; 184 } 185 186 #undef MSCPSIZE 187 188 /* 189 * Initialize the mscps. 190 */ 191 i = uha_create_mscps(sc, sc->sc_mscps, UHA_MSCP_MAX); 192 if (i == 0) { 193 printf("%s: unable to create mscps\n", 194 sc->sc_dev.dv_xname); 195 return; 196 } else if (i != UHA_MSCP_MAX) { 197 printf("%s: WARNING: only %d of %d mscps created\n", 198 sc->sc_dev.dv_xname, i, UHA_MSCP_MAX); 199 } 200 201 adapt->adapt_openings = i; 202 adapt->adapt_max_periph = adapt->adapt_openings; 203 204 /* 205 * ask the adapter what subunits are present 206 */ 207 config_found(&sc->sc_dev, &sc->sc_channel, scsiprint); 208 } 209 210 integrate void 211 uha_reset_mscp(sc, mscp) 212 struct uha_softc *sc; 213 struct uha_mscp *mscp; 214 { 215 216 mscp->flags = 0; 217 } 218 219 /* 220 * A mscp (and hence a mbx-out) is put onto the free list. 221 */ 222 void 223 uha_free_mscp(sc, mscp) 224 struct uha_softc *sc; 225 struct uha_mscp *mscp; 226 { 227 int s; 228 229 s = splbio(); 230 uha_reset_mscp(sc, mscp); 231 TAILQ_INSERT_HEAD(&sc->sc_free_mscp, mscp, chain); 232 splx(s); 233 } 234 235 integrate int 236 uha_init_mscp(sc, mscp) 237 struct uha_softc *sc; 238 struct uha_mscp *mscp; 239 { 240 bus_dma_tag_t dmat = sc->sc_dmat; 241 int hashnum, error; 242 243 /* 244 * Create the DMA map for this MSCP. 245 */ 246 error = bus_dmamap_create(dmat, UHA_MAXXFER, UHA_NSEG, UHA_MAXXFER, 247 0, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW | sc->sc_dmaflags, 248 &mscp->dmamap_xfer); 249 if (error) { 250 printf("%s: can't create mscp DMA map, error = %d\n", 251 sc->sc_dev.dv_xname, error); 252 return (error); 253 } 254 255 /* 256 * put in the phystokv hash table 257 * Never gets taken out. 258 */ 259 mscp->hashkey = sc->sc_dmamap_mscp->dm_segs[0].ds_addr + 260 UHA_MSCP_OFF(mscp); 261 hashnum = MSCP_HASH(mscp->hashkey); 262 mscp->nexthash = sc->sc_mscphash[hashnum]; 263 sc->sc_mscphash[hashnum] = mscp; 264 uha_reset_mscp(sc, mscp); 265 return (0); 266 } 267 268 /* 269 * Create a set of MSCPs and add them to the free list. 270 */ 271 int 272 uha_create_mscps(sc, mscpstore, count) 273 struct uha_softc *sc; 274 struct uha_mscp *mscpstore; 275 int count; 276 { 277 struct uha_mscp *mscp; 278 int i, error; 279 280 memset(mscpstore, 0, sizeof(struct uha_mscp) * count); 281 for (i = 0; i < count; i++) { 282 mscp = &mscpstore[i]; 283 if ((error = uha_init_mscp(sc, mscp)) != 0) { 284 printf("%s: unable to initialize mscp, error = %d\n", 285 sc->sc_dev.dv_xname, error); 286 goto out; 287 } 288 TAILQ_INSERT_TAIL(&sc->sc_free_mscp, mscp, chain); 289 } 290 out: 291 return (i); 292 } 293 294 /* 295 * Get a free mscp 296 * 297 * If there are none, see if we can allocate a new one. If so, put it in the 298 * hash table too otherwise either return an error or sleep. 299 */ 300 struct uha_mscp * 301 uha_get_mscp(sc) 302 struct uha_softc *sc; 303 { 304 struct uha_mscp *mscp; 305 int s; 306 307 s = splbio(); 308 mscp = TAILQ_FIRST(&sc->sc_free_mscp); 309 if (mscp != NULL) { 310 TAILQ_REMOVE(&sc->sc_free_mscp, mscp, chain); 311 mscp->flags |= MSCP_ALLOC; 312 } 313 splx(s); 314 return (mscp); 315 } 316 317 /* 318 * given a physical address, find the mscp that it corresponds to. 319 */ 320 struct uha_mscp * 321 uha_mscp_phys_kv(sc, mscp_phys) 322 struct uha_softc *sc; 323 u_long mscp_phys; 324 { 325 int hashnum = MSCP_HASH(mscp_phys); 326 struct uha_mscp *mscp = sc->sc_mscphash[hashnum]; 327 328 while (mscp) { 329 if (mscp->hashkey == mscp_phys) 330 break; 331 mscp = mscp->nexthash; 332 } 333 return (mscp); 334 } 335 336 /* 337 * We have a mscp which has been processed by the adaptor, now we look to see 338 * how the operation went. 339 */ 340 void 341 uha_done(sc, mscp) 342 struct uha_softc *sc; 343 struct uha_mscp *mscp; 344 { 345 bus_dma_tag_t dmat = sc->sc_dmat; 346 struct scsi_sense_data *s1, *s2; 347 struct scsipi_xfer *xs = mscp->xs; 348 349 SC_DEBUG(xs->xs_periph, SCSIPI_DB2, ("uha_done\n")); 350 351 bus_dmamap_sync(dmat, sc->sc_dmamap_mscp, 352 UHA_MSCP_OFF(mscp), sizeof(struct uha_mscp), 353 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 354 355 /* 356 * If we were a data transfer, unload the map that described 357 * the data buffer. 358 */ 359 if (xs->datalen) { 360 bus_dmamap_sync(dmat, mscp->dmamap_xfer, 0, 361 mscp->dmamap_xfer->dm_mapsize, 362 (xs->xs_control & XS_CTL_DATA_IN) ? BUS_DMASYNC_POSTREAD : 363 BUS_DMASYNC_POSTWRITE); 364 bus_dmamap_unload(dmat, mscp->dmamap_xfer); 365 } 366 367 /* 368 * Otherwise, put the results of the operation 369 * into the xfer and call whoever started it 370 */ 371 if ((mscp->flags & MSCP_ALLOC) == 0) { 372 printf("%s: exiting ccb not allocated!\n", sc->sc_dev.dv_xname); 373 Debugger(); 374 return; 375 } 376 if (xs->error == XS_NOERROR) { 377 if (mscp->host_stat != UHA_NO_ERR) { 378 switch (mscp->host_stat) { 379 case UHA_SBUS_TIMEOUT: /* No response */ 380 xs->error = XS_SELTIMEOUT; 381 break; 382 default: /* Other scsi protocol messes */ 383 printf("%s: host_stat %x\n", 384 sc->sc_dev.dv_xname, mscp->host_stat); 385 xs->error = XS_DRIVER_STUFFUP; 386 } 387 } else if (mscp->target_stat != SCSI_OK) { 388 switch (mscp->target_stat) { 389 case SCSI_CHECK: 390 s1 = &mscp->mscp_sense; 391 s2 = &xs->sense.scsi_sense; 392 *s2 = *s1; 393 xs->error = XS_SENSE; 394 break; 395 case SCSI_BUSY: 396 xs->error = XS_BUSY; 397 break; 398 default: 399 printf("%s: target_stat %x\n", 400 sc->sc_dev.dv_xname, mscp->target_stat); 401 xs->error = XS_DRIVER_STUFFUP; 402 } 403 } else 404 xs->resid = 0; 405 } 406 uha_free_mscp(sc, mscp); 407 scsipi_done(xs); 408 } 409 410 void 411 uhaminphys(bp) 412 struct buf *bp; 413 { 414 415 if (bp->b_bcount > UHA_MAXXFER) 416 bp->b_bcount = UHA_MAXXFER; 417 minphys(bp); 418 } 419 420 /* 421 * start a scsi operation given the command and the data address. Also 422 * needs the unit, target and lu. 423 */ 424 425 void 426 uha_scsipi_request(chan, req, arg) 427 struct scsipi_channel *chan; 428 scsipi_adapter_req_t req; 429 void *arg; 430 { 431 struct scsipi_xfer *xs; 432 struct scsipi_periph *periph; 433 struct uha_softc *sc = (void *)chan->chan_adapter->adapt_dev; 434 bus_dma_tag_t dmat = sc->sc_dmat; 435 struct uha_mscp *mscp; 436 int error, seg, flags, s; 437 438 439 switch (req) { 440 case ADAPTER_REQ_RUN_XFER: 441 xs = arg; 442 periph = xs->xs_periph; 443 flags = xs->xs_control; 444 445 SC_DEBUG(periph, SCSIPI_DB2, ("uha_scsipi_request\n")); 446 447 /* Get an MSCP to use. */ 448 mscp = uha_get_mscp(sc); 449 #ifdef DIAGNOSTIC 450 /* 451 * This should never happen as we track the resources 452 * in the mid-layer. 453 */ 454 if (mscp == NULL) { 455 scsipi_printaddr(periph); 456 printf("unable to allocate mscp\n"); 457 panic("uha_scsipi_request"); 458 } 459 #endif 460 461 mscp->xs = xs; 462 mscp->timeout = xs->timeout; 463 464 /* 465 * Put all the arguments for the xfer in the mscp 466 */ 467 if (flags & XS_CTL_RESET) { 468 mscp->opcode = UHA_SDR; 469 mscp->ca = 0x01; 470 } else { 471 if (xs->cmdlen > sizeof(mscp->scsi_cmd)) { 472 printf("%s: cmdlen %d too large for MSCP\n", 473 sc->sc_dev.dv_xname, xs->cmdlen); 474 xs->error = XS_DRIVER_STUFFUP; 475 goto out_bad; 476 } 477 mscp->opcode = UHA_TSP; 478 /* XXX Not for tapes. */ 479 mscp->ca = 0x01; 480 memcpy(&mscp->scsi_cmd, xs->cmd, mscp->scsi_cmd_length); 481 } 482 mscp->xdir = UHA_SDET; 483 mscp->dcn = 0x00; 484 mscp->chan = 0x00; 485 mscp->target = periph->periph_target; 486 mscp->lun = periph->periph_lun; 487 mscp->scsi_cmd_length = xs->cmdlen; 488 mscp->sense_ptr = sc->sc_dmamap_mscp->dm_segs[0].ds_addr + 489 UHA_MSCP_OFF(mscp) + offsetof(struct uha_mscp, mscp_sense); 490 mscp->req_sense_length = sizeof(mscp->mscp_sense); 491 mscp->host_stat = 0x00; 492 mscp->target_stat = 0x00; 493 494 if (xs->datalen) { 495 seg = 0; 496 #ifdef TFS 497 if (flags & SCSI_DATA_UIO) { 498 error = bus_dmamap_load_uio(dmat, 499 mscp->dmamap_xfer, (struct uio *)xs->data, 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 } else 505 #endif /*TFS */ 506 { 507 error = bus_dmamap_load(dmat, 508 mscp->dmamap_xfer, xs->data, xs->datalen, 509 NULL, 510 ((flags & XS_CTL_NOSLEEP) ? BUS_DMA_NOWAIT : 511 BUS_DMA_WAITOK) | BUS_DMA_STREAMING | 512 ((flags & XS_CTL_DATA_IN) ? BUS_DMA_READ : 513 BUS_DMA_WRITE)); 514 } 515 516 switch (error) { 517 case 0: 518 break; 519 520 case ENOMEM: 521 case EAGAIN: 522 xs->error = XS_RESOURCE_SHORTAGE; 523 goto out_bad; 524 525 default: 526 xs->error = XS_DRIVER_STUFFUP; 527 printf("%s: error %d loading DMA map\n", 528 sc->sc_dev.dv_xname, error); 529 out_bad: 530 uha_free_mscp(sc, mscp); 531 scsipi_done(xs); 532 return; 533 } 534 535 bus_dmamap_sync(dmat, mscp->dmamap_xfer, 0, 536 mscp->dmamap_xfer->dm_mapsize, 537 (flags & XS_CTL_DATA_IN) ? BUS_DMASYNC_PREREAD : 538 BUS_DMASYNC_PREWRITE); 539 540 /* 541 * Load the hardware scatter/gather map with the 542 * contents of the DMA map. 543 */ 544 for (seg = 0; 545 seg < mscp->dmamap_xfer->dm_nsegs; seg++) { 546 mscp->uha_dma[seg].seg_addr = 547 mscp->dmamap_xfer->dm_segs[seg].ds_addr; 548 mscp->uha_dma[seg].seg_len = 549 mscp->dmamap_xfer->dm_segs[seg].ds_len; 550 } 551 552 mscp->data_addr = 553 sc->sc_dmamap_mscp->dm_segs[0].ds_addr + 554 UHA_MSCP_OFF(mscp) + offsetof(struct uha_mscp, 555 uha_dma); 556 mscp->data_length = xs->datalen; 557 mscp->sgth = 0x01; 558 mscp->sg_num = seg; 559 } else { /* No data xfer, use non S/G values */ 560 mscp->data_addr = (physaddr)0; 561 mscp->data_length = 0; 562 mscp->sgth = 0x00; 563 mscp->sg_num = 0; 564 } 565 mscp->link_id = 0; 566 mscp->link_addr = (physaddr)0; 567 568 bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap_mscp, 569 UHA_MSCP_OFF(mscp), sizeof(struct uha_mscp), 570 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 571 572 s = splbio(); 573 (sc->start_mbox)(sc, mscp); 574 splx(s); 575 576 if ((flags & XS_CTL_POLL) == 0) 577 return; 578 579 /* 580 * If we can't use interrupts, poll on completion 581 */ 582 if ((sc->poll)(sc, xs, mscp->timeout)) { 583 uha_timeout(mscp); 584 if ((sc->poll)(sc, xs, mscp->timeout)) 585 uha_timeout(mscp); 586 } 587 return; 588 589 case ADAPTER_REQ_GROW_RESOURCES: 590 /* XXX Not supported. */ 591 return; 592 593 case ADAPTER_REQ_SET_XFER_MODE: 594 /* 595 * We can't really do this (the UltraStor controllers 596 * have their own config). 597 * 598 * XXX How do we query the config? 599 */ 600 return; 601 } 602 } 603 void 604 uha_timeout(arg) 605 void *arg; 606 { 607 struct uha_mscp *mscp = arg; 608 struct scsipi_xfer *xs = mscp->xs; 609 struct scsipi_periph *periph = xs->xs_periph; 610 struct uha_softc *sc = 611 (void *)periph->periph_channel->chan_adapter->adapt_dev; 612 int s; 613 614 scsipi_printaddr(periph); 615 printf("timed out"); 616 617 s = splbio(); 618 619 if (mscp->flags & MSCP_ABORT) { 620 /* abort timed out */ 621 printf(" AGAIN\n"); 622 /* XXX Must reset! */ 623 } else { 624 /* abort the operation that has timed out */ 625 printf("\n"); 626 mscp->xs->error = XS_TIMEOUT; 627 mscp->timeout = UHA_ABORT_TIMEOUT; 628 mscp->flags |= MSCP_ABORT; 629 (sc->start_mbox)(sc, mscp); 630 } 631 632 splx(s); 633 }
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