ahb.c revision 1.28.2.1
1 /* $NetBSD: ahb.c,v 1.28.2.1 1999/10/19 17:44:55 thorpej Exp $ */ 2 3 #include "opt_ddb.h" 4 5 #undef AHBDEBUG 6 #ifdef DDB 7 #define integrate 8 #else 9 #define integrate static inline 10 #endif 11 12 /*- 13 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. 14 * All rights reserved. 15 * 16 * This code is derived from software contributed to The NetBSD Foundation 17 * by Charles M. Hannum and by Jason R. Thorpe of the Numerical Aerospace 18 * Simulation Facility, NASA Ames Research Center. 19 * 20 * Redistribution and use in source and binary forms, with or without 21 * modification, are permitted provided that the following conditions 22 * are met: 23 * 1. Redistributions of source code must retain the above copyright 24 * notice, this list of conditions and the following disclaimer. 25 * 2. Redistributions in binary form must reproduce the above copyright 26 * notice, this list of conditions and the following disclaimer in the 27 * documentation and/or other materials provided with the distribution. 28 * 3. All advertising materials mentioning features or use of this software 29 * must display the following acknowledgement: 30 * This product includes software developed by the NetBSD 31 * Foundation, Inc. and its contributors. 32 * 4. Neither the name of The NetBSD Foundation nor the names of its 33 * contributors may be used to endorse or promote products derived 34 * from this software without specific prior written permission. 35 * 36 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 37 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 38 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 39 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 40 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 41 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 42 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 43 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 44 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 45 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 46 * POSSIBILITY OF SUCH DAMAGE. 47 */ 48 49 /* 50 * Originally written by Julian Elischer (julian (at) tfs.com) 51 * for TRW Financial Systems for use under the MACH(2.5) operating system. 52 * 53 * TRW Financial Systems, in accordance with their agreement with Carnegie 54 * Mellon University, makes this software available to CMU to distribute 55 * or use in any manner that they see fit as long as this message is kept with 56 * the software. For this reason TFS also grants any other persons or 57 * organisations permission to use or modify this software. 58 * 59 * TFS supplies this software to be publicly redistributed 60 * on the understanding that TFS is not responsible for the correct 61 * functioning of this software in any circumstances. 62 */ 63 64 #include <sys/types.h> 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 <machine/bus.h> 77 #include <machine/intr.h> 78 79 #include <dev/scsipi/scsi_all.h> 80 #include <dev/scsipi/scsipi_all.h> 81 #include <dev/scsipi/scsiconf.h> 82 83 #include <dev/eisa/eisareg.h> 84 #include <dev/eisa/eisavar.h> 85 #include <dev/eisa/eisadevs.h> 86 #include <dev/eisa/ahbreg.h> 87 88 #ifndef DDB 89 #define Debugger() panic("should call debugger here (aha1742.c)") 90 #endif /* ! DDB */ 91 92 #define AHB_ECB_MAX 32 /* store up to 32 ECBs at one time */ 93 #define ECB_HASH_SIZE 32 /* hash table size for phystokv */ 94 #define ECB_HASH_SHIFT 9 95 #define ECB_HASH(x) ((((long)(x))>>ECB_HASH_SHIFT) & (ECB_HASH_SIZE - 1)) 96 97 #define AHB_MAXXFER ((AHB_NSEG - 1) << PGSHIFT) 98 99 struct ahb_softc { 100 struct device sc_dev; 101 102 bus_space_tag_t sc_iot; 103 bus_space_handle_t sc_ioh; 104 bus_dma_tag_t sc_dmat; 105 void *sc_ih; 106 107 bus_dmamap_t sc_dmamap_ecb; /* maps the ecbs */ 108 struct ahb_ecb *sc_ecbs; /* all our ecbs */ 109 110 struct ahb_ecb *sc_ecbhash[ECB_HASH_SIZE]; 111 TAILQ_HEAD(, ahb_ecb) sc_free_ecb; 112 struct ahb_ecb *sc_immed_ecb; /* an outstanding immediete command */ 113 int sc_numecbs; 114 115 struct scsipi_adapter sc_adapter; 116 struct scsipi_channel sc_channel; 117 }; 118 119 /* 120 * Offset of an ECB from the beginning of the ECB DMA mapping. 121 */ 122 #define AHB_ECB_OFF(e) (((u_long)(e)) - ((u_long)&sc->sc_ecbs[0])) 123 124 struct ahb_probe_data { 125 int sc_irq; 126 int sc_scsi_dev; 127 }; 128 129 void ahb_send_mbox __P((struct ahb_softc *, int, struct ahb_ecb *)); 130 void ahb_send_immed __P((struct ahb_softc *, u_long, struct ahb_ecb *)); 131 int ahbintr __P((void *)); 132 void ahb_free_ecb __P((struct ahb_softc *, struct ahb_ecb *)); 133 struct ahb_ecb *ahb_get_ecb __P((struct ahb_softc *, int)); 134 struct ahb_ecb *ahb_ecb_phys_kv __P((struct ahb_softc *, physaddr)); 135 void ahb_done __P((struct ahb_softc *, struct ahb_ecb *)); 136 int ahb_find __P((bus_space_tag_t, bus_space_handle_t, struct ahb_probe_data *)); 137 int ahb_init __P((struct ahb_softc *)); 138 void ahbminphys __P((struct buf *)); 139 void ahb_scsipi_request __P((struct scsipi_channel *, 140 scsipi_adapter_req_t, void *)); 141 int ahb_poll __P((struct ahb_softc *, struct scsipi_xfer *, int)); 142 void ahb_timeout __P((void *)); 143 int ahb_create_ecbs __P((struct ahb_softc *, struct ahb_ecb *, int)); 144 145 integrate void ahb_reset_ecb __P((struct ahb_softc *, struct ahb_ecb *)); 146 integrate int ahb_init_ecb __P((struct ahb_softc *, struct ahb_ecb *)); 147 148 int ahbmatch __P((struct device *, struct cfdata *, void *)); 149 void ahbattach __P((struct device *, struct device *, void *)); 150 151 struct cfattach ahb_ca = { 152 sizeof(struct ahb_softc), ahbmatch, ahbattach 153 }; 154 155 #define AHB_ABORT_TIMEOUT 2000 /* time to wait for abort (mSec) */ 156 157 /* 158 * Check the slots looking for a board we recognise 159 * If we find one, note it's address (slot) and call 160 * the actual probe routine to check it out. 161 */ 162 int 163 ahbmatch(parent, match, aux) 164 struct device *parent; 165 struct cfdata *match; 166 void *aux; 167 { 168 struct eisa_attach_args *ea = aux; 169 bus_space_tag_t iot = ea->ea_iot; 170 bus_space_handle_t ioh; 171 int rv; 172 173 /* must match one of our known ID strings */ 174 if (strcmp(ea->ea_idstring, "ADP0000") && 175 strcmp(ea->ea_idstring, "ADP0001") && 176 strcmp(ea->ea_idstring, "ADP0002") && 177 strcmp(ea->ea_idstring, "ADP0400")) 178 return (0); 179 180 if (bus_space_map(iot, 181 EISA_SLOT_ADDR(ea->ea_slot) + AHB_EISA_SLOT_OFFSET, AHB_EISA_IOSIZE, 182 0, &ioh)) 183 return (0); 184 185 rv = !ahb_find(iot, ioh, NULL); 186 187 bus_space_unmap(iot, ioh, AHB_EISA_IOSIZE); 188 189 return (rv); 190 } 191 192 /* 193 * Attach all the sub-devices we can find 194 */ 195 void 196 ahbattach(parent, self, aux) 197 struct device *parent, *self; 198 void *aux; 199 { 200 struct eisa_attach_args *ea = aux; 201 struct ahb_softc *sc = (void *)self; 202 bus_space_tag_t iot = ea->ea_iot; 203 bus_space_handle_t ioh; 204 eisa_chipset_tag_t ec = ea->ea_ec; 205 eisa_intr_handle_t ih; 206 const char *model, *intrstr; 207 struct ahb_probe_data apd; 208 struct scsipi_adapter *adapt = &sc->sc_adapter; 209 struct scsipi_channel *chan = &sc->sc_channel; 210 211 if (!strcmp(ea->ea_idstring, "ADP0000")) 212 model = EISA_PRODUCT_ADP0000; 213 else if (!strcmp(ea->ea_idstring, "ADP0001")) 214 model = EISA_PRODUCT_ADP0001; 215 else if (!strcmp(ea->ea_idstring, "ADP0002")) 216 model = EISA_PRODUCT_ADP0002; 217 else if (!strcmp(ea->ea_idstring, "ADP0400")) 218 model = EISA_PRODUCT_ADP0400; 219 else 220 model = "unknown model!"; 221 printf(": %s\n", model); 222 223 if (bus_space_map(iot, 224 EISA_SLOT_ADDR(ea->ea_slot) + AHB_EISA_SLOT_OFFSET, AHB_EISA_IOSIZE, 225 0, &ioh)) 226 panic("ahbattach: could not map I/O addresses"); 227 228 sc->sc_iot = iot; 229 sc->sc_ioh = ioh; 230 sc->sc_dmat = ea->ea_dmat; 231 if (ahb_find(iot, ioh, &apd)) 232 panic("ahbattach: ahb_find failed!"); 233 234 TAILQ_INIT(&sc->sc_free_ecb); 235 236 /* 237 * Fill in the scsipi_adapter. 238 */ 239 memset(adapt, 0, sizeof(*adapt)); 240 adapt->adapt_dev = &sc->sc_dev; 241 adapt->adapt_nchannels = 1; 242 /* adapt_openings initialized below */ 243 adapt->adapt_max_periph = 4; /* XXX arbitrary? */ 244 adapt->adapt_request = ahb_scsipi_request; 245 adapt->adapt_minphys = ahbminphys; 246 247 /* 248 * Fill in the scsipi_channel. 249 */ 250 memset(chan, 0, sizeof(*chan)); 251 chan->chan_adapter = adapt; 252 chan->chan_bustype = &scsi_bustype; 253 chan->chan_channel = 0; 254 chan->chan_ntargets = 8; 255 chan->chan_nluns = 8; 256 chan->chan_id = apd.sc_scsi_dev; 257 258 if (ahb_init(sc) != 0) { 259 /* Error during initialization! */ 260 return; 261 } 262 263 if (eisa_intr_map(ec, apd.sc_irq, &ih)) { 264 printf("%s: couldn't map interrupt (%d)\n", 265 sc->sc_dev.dv_xname, apd.sc_irq); 266 return; 267 } 268 intrstr = eisa_intr_string(ec, ih); 269 sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO, 270 ahbintr, sc); 271 if (sc->sc_ih == NULL) { 272 printf("%s: couldn't establish interrupt", 273 sc->sc_dev.dv_xname); 274 if (intrstr != NULL) 275 printf(" at %s", intrstr); 276 printf("\n"); 277 return; 278 } 279 if (intrstr != NULL) 280 printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, 281 intrstr); 282 283 /* 284 * ask the adapter what subunits are present 285 */ 286 config_found(self, &sc->sc_channel, scsiprint); 287 } 288 289 /* 290 * Function to send a command out through a mailbox 291 */ 292 void 293 ahb_send_mbox(sc, opcode, ecb) 294 struct ahb_softc *sc; 295 int opcode; 296 struct ahb_ecb *ecb; 297 { 298 bus_space_tag_t iot = sc->sc_iot; 299 bus_space_handle_t ioh = sc->sc_ioh; 300 int wait = 300; /* 1ms should be enough */ 301 302 while (--wait) { 303 if ((bus_space_read_1(iot, ioh, G2STAT) & (G2STAT_BUSY | G2STAT_MBOX_EMPTY)) 304 == (G2STAT_MBOX_EMPTY)) 305 break; 306 delay(10); 307 } 308 if (!wait) { 309 printf("%s: board not responding\n", sc->sc_dev.dv_xname); 310 Debugger(); 311 } 312 313 /* 314 * don't know if this will work. 315 * XXX WHAT DOES THIS COMMENT MEAN?! --thorpej 316 */ 317 bus_space_write_4(iot, ioh, MBOXOUT0, 318 sc->sc_dmamap_ecb->dm_segs[0].ds_addr + AHB_ECB_OFF(ecb)); 319 bus_space_write_1(iot, ioh, ATTN, opcode | 320 ecb->xs->xs_periph->periph_target); 321 322 if ((ecb->xs->xs_control & XS_CTL_POLL) == 0) 323 timeout(ahb_timeout, ecb, (ecb->timeout * hz) / 1000); 324 } 325 326 /* 327 * Function to send an immediate type command to the adapter 328 */ 329 void 330 ahb_send_immed(sc, cmd, ecb) 331 struct ahb_softc *sc; 332 u_long cmd; 333 struct ahb_ecb *ecb; 334 { 335 bus_space_tag_t iot = sc->sc_iot; 336 bus_space_handle_t ioh = sc->sc_ioh; 337 int wait = 100; /* 1 ms enough? */ 338 339 while (--wait) { 340 if ((bus_space_read_1(iot, ioh, G2STAT) & (G2STAT_BUSY | G2STAT_MBOX_EMPTY)) 341 == (G2STAT_MBOX_EMPTY)) 342 break; 343 delay(10); 344 } 345 if (!wait) { 346 printf("%s: board not responding\n", sc->sc_dev.dv_xname); 347 Debugger(); 348 } 349 350 bus_space_write_4(iot, ioh, MBOXOUT0, cmd); /* don't know this will work */ 351 bus_space_write_1(iot, ioh, G2CNTRL, G2CNTRL_SET_HOST_READY); 352 bus_space_write_1(iot, ioh, ATTN, OP_IMMED | 353 ecb->xs->xs_periph->periph_target); 354 355 if ((ecb->xs->xs_control & XS_CTL_POLL) == 0) 356 timeout(ahb_timeout, ecb, (ecb->timeout * hz) / 1000); 357 } 358 359 /* 360 * Catch an interrupt from the adaptor 361 */ 362 int 363 ahbintr(arg) 364 void *arg; 365 { 366 struct ahb_softc *sc = arg; 367 bus_space_tag_t iot = sc->sc_iot; 368 bus_space_handle_t ioh = sc->sc_ioh; 369 struct ahb_ecb *ecb; 370 u_char ahbstat; 371 u_long mboxval; 372 373 #ifdef AHBDEBUG 374 printf("%s: ahbintr ", sc->sc_dev.dv_xname); 375 #endif /* AHBDEBUG */ 376 377 if ((bus_space_read_1(iot, ioh, G2STAT) & G2STAT_INT_PEND) == 0) 378 return 0; 379 380 for (;;) { 381 /* 382 * First get all the information and then 383 * acknowlege the interrupt 384 */ 385 ahbstat = bus_space_read_1(iot, ioh, G2INTST); 386 mboxval = bus_space_read_4(iot, ioh, MBOXIN0); 387 bus_space_write_1(iot, ioh, G2CNTRL, G2CNTRL_CLEAR_EISA_INT); 388 389 #ifdef AHBDEBUG 390 printf("status = 0x%x ", ahbstat); 391 #endif /* AHBDEBUG */ 392 393 /* 394 * Process the completed operation 395 */ 396 switch (ahbstat & G2INTST_INT_STAT) { 397 case AHB_ECB_OK: 398 case AHB_ECB_RECOVERED: 399 case AHB_ECB_ERR: 400 ecb = ahb_ecb_phys_kv(sc, mboxval); 401 if (!ecb) { 402 printf("%s: BAD ECB RETURNED!\n", 403 sc->sc_dev.dv_xname); 404 goto next; /* whatever it was, it'll timeout */ 405 } 406 break; 407 408 case AHB_IMMED_ERR: 409 ecb = sc->sc_immed_ecb; 410 sc->sc_immed_ecb = 0; 411 ecb->flags |= ECB_IMMED_FAIL; 412 break; 413 414 case AHB_IMMED_OK: 415 ecb = sc->sc_immed_ecb; 416 sc->sc_immed_ecb = 0; 417 break; 418 419 default: 420 printf("%s: unexpected interrupt %x\n", 421 sc->sc_dev.dv_xname, ahbstat); 422 goto next; 423 } 424 425 untimeout(ahb_timeout, ecb); 426 ahb_done(sc, ecb); 427 428 next: 429 if ((bus_space_read_1(iot, ioh, G2STAT) & G2STAT_INT_PEND) == 0) 430 return 1; 431 } 432 } 433 434 integrate void 435 ahb_reset_ecb(sc, ecb) 436 struct ahb_softc *sc; 437 struct ahb_ecb *ecb; 438 { 439 440 ecb->flags = 0; 441 } 442 443 /* 444 * A ecb (and hence a mbx-out is put onto the 445 * free list. 446 */ 447 void 448 ahb_free_ecb(sc, ecb) 449 struct ahb_softc *sc; 450 struct ahb_ecb *ecb; 451 { 452 int s; 453 454 s = splbio(); 455 456 ahb_reset_ecb(sc, ecb); 457 TAILQ_INSERT_HEAD(&sc->sc_free_ecb, ecb, chain); 458 459 /* 460 * If there were none, wake anybody waiting for one to come free, 461 * starting with queued entries. 462 */ 463 if (ecb->chain.tqe_next == 0) 464 wakeup(&sc->sc_free_ecb); 465 466 splx(s); 467 } 468 469 /* 470 * Create a set of ecbs and add them to the free list. 471 */ 472 integrate int 473 ahb_init_ecb(sc, ecb) 474 struct ahb_softc *sc; 475 struct ahb_ecb *ecb; 476 { 477 bus_dma_tag_t dmat = sc->sc_dmat; 478 int hashnum, error; 479 480 /* 481 * Create the DMA map for this ECB. 482 */ 483 error = bus_dmamap_create(dmat, AHB_MAXXFER, AHB_NSEG, AHB_MAXXFER, 484 0, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW, &ecb->dmamap_xfer); 485 if (error) { 486 printf("%s: can't create ecb dmamap_xfer\n", 487 sc->sc_dev.dv_xname); 488 return (error); 489 } 490 491 /* 492 * put in the phystokv hash table 493 * Never gets taken out. 494 */ 495 ecb->hashkey = sc->sc_dmamap_ecb->dm_segs[0].ds_addr + 496 AHB_ECB_OFF(ecb); 497 hashnum = ECB_HASH(ecb->hashkey); 498 ecb->nexthash = sc->sc_ecbhash[hashnum]; 499 sc->sc_ecbhash[hashnum] = ecb; 500 ahb_reset_ecb(sc, ecb); 501 return (0); 502 } 503 504 int 505 ahb_create_ecbs(sc, ecbstore, count) 506 struct ahb_softc *sc; 507 struct ahb_ecb *ecbstore; 508 int count; 509 { 510 struct ahb_ecb *ecb; 511 int i, error; 512 513 bzero(ecbstore, sizeof(struct ahb_ecb) * count); 514 for (i = 0; i < count; i++) { 515 ecb = &ecbstore[i]; 516 if ((error = ahb_init_ecb(sc, ecb)) != 0) { 517 printf("%s: unable to initialize ecb, error = %d\n", 518 sc->sc_dev.dv_xname, error); 519 goto out; 520 } 521 TAILQ_INSERT_TAIL(&sc->sc_free_ecb, ecb, chain); 522 } 523 out: 524 return (i); 525 } 526 527 /* 528 * Get a free ecb 529 * 530 * If there are none, see if we can allocate a new one. If so, put it in the 531 * hash table too otherwise either return an error or sleep. 532 */ 533 struct ahb_ecb * 534 ahb_get_ecb(sc, flags) 535 struct ahb_softc *sc; 536 int flags; 537 { 538 struct ahb_ecb *ecb; 539 int s; 540 541 s = splbio(); 542 543 /* 544 * If we can and have to, sleep waiting for one to come free 545 * but only if we can't allocate a new one. 546 */ 547 for (;;) { 548 ecb = sc->sc_free_ecb.tqh_first; 549 if (ecb) { 550 TAILQ_REMOVE(&sc->sc_free_ecb, ecb, chain); 551 break; 552 } 553 if ((flags & XS_CTL_NOSLEEP) != 0) 554 goto out; 555 tsleep(&sc->sc_free_ecb, PRIBIO, "ahbecb", 0); 556 } 557 558 ecb->flags |= ECB_ALLOC; 559 560 out: 561 splx(s); 562 return ecb; 563 } 564 565 /* 566 * given a physical address, find the ecb that it corresponds to. 567 */ 568 struct ahb_ecb * 569 ahb_ecb_phys_kv(sc, ecb_phys) 570 struct ahb_softc *sc; 571 physaddr ecb_phys; 572 { 573 int hashnum = ECB_HASH(ecb_phys); 574 struct ahb_ecb *ecb = sc->sc_ecbhash[hashnum]; 575 576 while (ecb) { 577 if (ecb->hashkey == ecb_phys) 578 break; 579 ecb = ecb->nexthash; 580 } 581 return ecb; 582 } 583 584 /* 585 * We have a ecb which has been processed by the adaptor, now we look to see 586 * how the operation went. 587 */ 588 void 589 ahb_done(sc, ecb) 590 struct ahb_softc *sc; 591 struct ahb_ecb *ecb; 592 { 593 bus_dma_tag_t dmat = sc->sc_dmat; 594 struct scsipi_sense_data *s1, *s2; 595 struct scsipi_xfer *xs = ecb->xs; 596 597 SC_DEBUG(xs->sc_link, SDEV_DB2, ("ahb_done\n")); 598 599 bus_dmamap_sync(dmat, sc->sc_dmamap_ecb, 600 AHB_ECB_OFF(ecb), sizeof(struct ahb_ecb), 601 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 602 603 /* 604 * If we were a data transfer, unload the map that described 605 * the data buffer. 606 */ 607 if (xs->datalen) { 608 bus_dmamap_sync(dmat, ecb->dmamap_xfer, 0, 609 ecb->dmamap_xfer->dm_mapsize, 610 (xs->xs_control & XS_CTL_DATA_IN) ? BUS_DMASYNC_POSTREAD : 611 BUS_DMASYNC_POSTWRITE); 612 bus_dmamap_unload(dmat, ecb->dmamap_xfer); 613 } 614 615 /* 616 * Otherwise, put the results of the operation 617 * into the xfer and call whoever started it 618 */ 619 if ((ecb->flags & ECB_ALLOC) == 0) { 620 printf("%s: exiting ecb not allocated!\n", sc->sc_dev.dv_xname); 621 Debugger(); 622 } 623 if (ecb->flags & ECB_IMMED) { 624 if (ecb->flags & ECB_IMMED_FAIL) 625 xs->error = XS_DRIVER_STUFFUP; 626 goto done; 627 } 628 if (xs->error == XS_NOERROR) { 629 if (ecb->ecb_status.host_stat != HS_OK) { 630 switch (ecb->ecb_status.host_stat) { 631 case HS_TIMED_OUT: /* No response */ 632 xs->error = XS_SELTIMEOUT; 633 break; 634 default: /* Other scsi protocol messes */ 635 printf("%s: host_stat %x\n", 636 sc->sc_dev.dv_xname, ecb->ecb_status.host_stat); 637 xs->error = XS_DRIVER_STUFFUP; 638 } 639 } else if (ecb->ecb_status.target_stat != SCSI_OK) { 640 switch (ecb->ecb_status.target_stat) { 641 case SCSI_CHECK: 642 s1 = &ecb->ecb_sense; 643 s2 = &xs->sense.scsi_sense; 644 *s2 = *s1; 645 xs->error = XS_SENSE; 646 break; 647 case SCSI_BUSY: 648 xs->error = XS_BUSY; 649 break; 650 default: 651 printf("%s: target_stat %x\n", 652 sc->sc_dev.dv_xname, ecb->ecb_status.target_stat); 653 xs->error = XS_DRIVER_STUFFUP; 654 } 655 } else 656 xs->resid = 0; 657 } 658 done: 659 ahb_free_ecb(sc, ecb); 660 scsipi_done(xs); 661 } 662 663 /* 664 * Start the board, ready for normal operation 665 */ 666 int 667 ahb_find(iot, ioh, sc) 668 bus_space_tag_t iot; 669 bus_space_handle_t ioh; 670 struct ahb_probe_data *sc; 671 { 672 u_char intdef; 673 int i, irq, busid; 674 int wait = 1000; /* 1 sec enough? */ 675 676 bus_space_write_1(iot, ioh, PORTADDR, PORTADDR_ENHANCED); 677 678 #define NO_NO 1 679 #ifdef NO_NO 680 /* 681 * reset board, If it doesn't respond, assume 682 * that it's not there.. good for the probe 683 */ 684 bus_space_write_1(iot, ioh, G2CNTRL, G2CNTRL_HARD_RESET); 685 delay(1000); 686 bus_space_write_1(iot, ioh, G2CNTRL, 0); 687 delay(10000); 688 while (--wait) { 689 if ((bus_space_read_1(iot, ioh, G2STAT) & G2STAT_BUSY) == 0) 690 break; 691 delay(1000); 692 } 693 if (!wait) { 694 #ifdef AHBDEBUG 695 printf("ahb_find: No answer from aha1742 board\n"); 696 #endif /* AHBDEBUG */ 697 return ENXIO; 698 } 699 i = bus_space_read_1(iot, ioh, MBOXIN0); 700 if (i) { 701 printf("self test failed, val = 0x%x\n", i); 702 return EIO; 703 } 704 705 /* Set it again, just to be sure. */ 706 bus_space_write_1(iot, ioh, PORTADDR, PORTADDR_ENHANCED); 707 #endif 708 709 while (bus_space_read_1(iot, ioh, G2STAT) & G2STAT_INT_PEND) { 710 printf("."); 711 bus_space_write_1(iot, ioh, G2CNTRL, G2CNTRL_CLEAR_EISA_INT); 712 delay(10000); 713 } 714 715 intdef = bus_space_read_1(iot, ioh, INTDEF); 716 switch (intdef & 0x07) { 717 case INT9: 718 irq = 9; 719 break; 720 case INT10: 721 irq = 10; 722 break; 723 case INT11: 724 irq = 11; 725 break; 726 case INT12: 727 irq = 12; 728 break; 729 case INT14: 730 irq = 14; 731 break; 732 case INT15: 733 irq = 15; 734 break; 735 default: 736 printf("illegal int setting %x\n", intdef); 737 return EIO; 738 } 739 740 bus_space_write_1(iot, ioh, INTDEF, (intdef | INTEN)); /* make sure we can interrupt */ 741 742 /* who are we on the scsi bus? */ 743 busid = (bus_space_read_1(iot, ioh, SCSIDEF) & HSCSIID); 744 745 /* if we want to return data, do so now */ 746 if (sc) { 747 sc->sc_irq = irq; 748 sc->sc_scsi_dev = busid; 749 } 750 751 /* 752 * Note that we are going and return (to probe) 753 */ 754 return 0; 755 } 756 757 int 758 ahb_init(sc) 759 struct ahb_softc *sc; 760 { 761 bus_dma_segment_t seg; 762 int i, error, rseg; 763 764 #define ECBSIZE (AHB_ECB_MAX * sizeof(struct ahb_ecb)) 765 766 /* 767 * Allocate the ECBs. 768 */ 769 if ((error = bus_dmamem_alloc(sc->sc_dmat, ECBSIZE, 770 NBPG, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) { 771 printf("%s: unable to allocate ecbs, error = %d\n", 772 sc->sc_dev.dv_xname, error); 773 return (error); 774 } 775 if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, 776 ECBSIZE, (caddr_t *)&sc->sc_ecbs, 777 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 778 printf("%s: unable to map ecbs, error = %d\n", 779 sc->sc_dev.dv_xname, error); 780 return (error); 781 } 782 783 /* 784 * Create and load the DMA map used for the ecbs. 785 */ 786 if ((error = bus_dmamap_create(sc->sc_dmat, ECBSIZE, 787 1, ECBSIZE, 0, BUS_DMA_NOWAIT, &sc->sc_dmamap_ecb)) != 0) { 788 printf("%s: unable to create ecb DMA map, error = %d\n", 789 sc->sc_dev.dv_xname, error); 790 return (error); 791 } 792 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_dmamap_ecb, 793 sc->sc_ecbs, ECBSIZE, NULL, BUS_DMA_NOWAIT)) != 0) { 794 printf("%s: unable to load ecb DMA map, error = %d\n", 795 sc->sc_dev.dv_xname, error); 796 return (error); 797 } 798 799 #undef ECBSIZE 800 801 /* 802 * Initialize the ecbs. 803 */ 804 i = ahb_create_ecbs(sc, sc->sc_ecbs, AHB_ECB_MAX); 805 if (i == 0) { 806 printf("%s: unable to create ecbs\n", 807 sc->sc_dev.dv_xname); 808 return (ENOMEM); 809 } else if (i != AHB_ECB_MAX) { 810 printf("%s: WARNING: only %d of %d ecbs created\n", 811 sc->sc_dev.dv_xname, i, AHB_ECB_MAX); 812 } 813 814 sc->sc_adapter.adapt_openings = i; 815 816 return (0); 817 } 818 819 void 820 ahbminphys(bp) 821 struct buf *bp; 822 { 823 824 if (bp->b_bcount > AHB_MAXXFER) 825 bp->b_bcount = AHB_MAXXFER; 826 minphys(bp); 827 } 828 829 /* 830 * start a scsi operation given the command and the data address. Also needs 831 * the unit, target and lu. 832 */ 833 void 834 ahb_scsipi_request(chan, req, arg) 835 struct scsipi_channel *chan; 836 scsipi_adapter_req_t req; 837 void *arg; 838 { 839 struct scsipi_xfer *xs; 840 struct scsipi_periph *periph; 841 struct ahb_softc *sc = (void *)chan->chan_adapter->adapt_dev; 842 bus_dma_tag_t dmat = sc->sc_dmat; 843 struct ahb_ecb *ecb; 844 int error, seg, flags, s; 845 846 switch (req) { 847 case ADAPTER_REQ_RUN_XFER: 848 xs = arg; 849 periph = xs->xs_periph; 850 flags = xs->xs_control; 851 852 SC_DEBUG(sc_link, SDEV_DB2, ("ahb_scsipi_request\n")); 853 854 /* Get an ECB to use. */ 855 ecb = ahb_get_ecb(sc, flags); 856 #ifdef DIAGNOSTIC 857 /* 858 * This should never happen as we track the resources 859 * in the mid-layer. 860 */ 861 if (ecb == NULL) { 862 scsipi_printaddr(periph); 863 printf("unable to allocate ecb\n"); 864 panic("ahb_scsipi_request"); 865 } 866 #endif 867 868 ecb->xs = xs; 869 ecb->timeout = xs->timeout; 870 871 /* 872 * If it's a reset, we need to do an 'immediate' 873 * command, and store its ecb for later 874 * if there is already an immediate waiting, 875 * then WE must wait 876 */ 877 if (flags & XS_CTL_RESET) { 878 ecb->flags |= ECB_IMMED; 879 if (sc->sc_immed_ecb) { 880 ahb_free_ecb(sc, ecb); 881 xs->error = XS_BUSY; 882 scsipi_done(xs); 883 return; 884 } 885 sc->sc_immed_ecb = ecb; 886 887 s = splbio(); 888 ahb_send_immed(sc, AHB_TARG_RESET, ecb); 889 splx(s); 890 891 if ((flags & XS_CTL_POLL) == 0) 892 return; 893 894 /* 895 * If we can't use interrupts, poll on completion 896 */ 897 if (ahb_poll(sc, xs, ecb->timeout)) 898 ahb_timeout(ecb); 899 return; 900 } 901 902 /* 903 * Put all the arguments for the xfer in the ecb 904 */ 905 ecb->opcode = ECB_SCSI_OP; 906 ecb->opt1 = ECB_SES /*| ECB_DSB*/ | ECB_ARS; 907 ecb->opt2 = periph->periph_lun | ECB_NRB; 908 bcopy(xs->cmd, &ecb->scsi_cmd, 909 ecb->scsi_cmd_length = xs->cmdlen); 910 ecb->sense_ptr = sc->sc_dmamap_ecb->dm_segs[0].ds_addr + 911 AHB_ECB_OFF(ecb) + offsetof(struct ahb_ecb, ecb_sense); 912 ecb->req_sense_length = sizeof(ecb->ecb_sense); 913 ecb->status = sc->sc_dmamap_ecb->dm_segs[0].ds_addr + 914 AHB_ECB_OFF(ecb) + offsetof(struct ahb_ecb, ecb_status); 915 ecb->ecb_status.host_stat = 0x00; 916 ecb->ecb_status.target_stat = 0x00; 917 918 if (xs->datalen) { 919 /* 920 * Map the DMA transfer. 921 */ 922 #ifdef TFS 923 if (flags & XS_CTL_DATA_UIO) { 924 error = bus_dmamap_load_uio(sc->sc_dmat, 925 ecb->dmamap_xfer, (struct uio *)xs->data, 926 (flags & XS_CTL_NOSLEEP) ? BUS_DMA_NOWAIT : 927 BUS_DMA_WAITOK); 928 } else 929 #endif /* TFS */ 930 { 931 error = bus_dmamap_load(sc->sc_dmat, 932 ecb->dmamap_xfer, xs->data, xs->datalen, 933 NULL, (flags & XS_CTL_NOSLEEP) ? 934 BUS_DMA_NOWAIT : BUS_DMA_WAITOK); 935 } 936 937 if (error) { 938 if (error == EFBIG) { 939 printf("%s: ahb_scsipi_request, more " 940 "than %d dma segments\n", 941 sc->sc_dev.dv_xname, AHB_NSEG); 942 } else { 943 printf("%s: ahb_scsipi_request, error " 944 "%d loading dma map\n", 945 sc->sc_dev.dv_xname, error); 946 } 947 ahb_free_ecb(sc, ecb); 948 xs->error = XS_DRIVER_STUFFUP; 949 scsipi_done(xs); 950 return; 951 } 952 953 bus_dmamap_sync(dmat, ecb->dmamap_xfer, 0, 954 ecb->dmamap_xfer->dm_mapsize, 955 (flags & XS_CTL_DATA_IN) ? BUS_DMASYNC_PREREAD : 956 BUS_DMASYNC_PREWRITE); 957 958 /* 959 * Load the hardware scatter/gather map with the 960 * contents of the DMA map. 961 */ 962 for (seg = 0; seg < ecb->dmamap_xfer->dm_nsegs; seg++) { 963 ecb->ahb_dma[seg].seg_addr = 964 ecb->dmamap_xfer->dm_segs[seg].ds_addr; 965 ecb->ahb_dma[seg].seg_len = 966 ecb->dmamap_xfer->dm_segs[seg].ds_len; 967 } 968 969 ecb->data_addr = sc->sc_dmamap_ecb->dm_segs[0].ds_addr + 970 AHB_ECB_OFF(ecb) + 971 offsetof(struct ahb_ecb, ahb_dma); 972 ecb->data_length = ecb->dmamap_xfer->dm_nsegs * 973 sizeof(struct ahb_dma_seg); 974 ecb->opt1 |= ECB_S_G; 975 } else { /* No data xfer, use non S/G values */ 976 ecb->data_addr = (physaddr)0; 977 ecb->data_length = 0; 978 } 979 ecb->link_addr = (physaddr)0; 980 981 bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap_ecb, 982 AHB_ECB_OFF(ecb), sizeof(struct ahb_ecb), 983 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 984 985 s = splbio(); 986 ahb_send_mbox(sc, OP_START_ECB, ecb); 987 splx(s); 988 989 if ((flags & XS_CTL_POLL) == 0) 990 return; 991 992 /* 993 * If we can't use interrupts, poll on completion 994 */ 995 if (ahb_poll(sc, xs, ecb->timeout)) { 996 ahb_timeout(ecb); 997 if (ahb_poll(sc, xs, ecb->timeout)) 998 ahb_timeout(ecb); 999 } 1000 return; 1001 1002 case ADAPTER_REQ_GROW_RESOURCES: 1003 /* XXX Not supported. */ 1004 return; 1005 1006 case ADAPTER_REQ_SET_XFER_MODE: 1007 /* XXX How do we do this? */ 1008 return; 1009 1010 case ADAPTER_REQ_GET_XFER_MODE: 1011 /* XXX How do we do this? */ 1012 return; 1013 } 1014 } 1015 1016 /* 1017 * Function to poll for command completion when in poll mode 1018 */ 1019 int 1020 ahb_poll(sc, xs, count) 1021 struct ahb_softc *sc; 1022 struct scsipi_xfer *xs; 1023 int count; 1024 { /* in msec */ 1025 bus_space_tag_t iot = sc->sc_iot; 1026 bus_space_handle_t ioh = sc->sc_ioh; 1027 1028 while (count) { 1029 /* 1030 * If we had interrupts enabled, would we 1031 * have got an interrupt? 1032 */ 1033 if (bus_space_read_1(iot, ioh, G2STAT) & G2STAT_INT_PEND) 1034 ahbintr(sc); 1035 if (xs->xs_status & XS_STS_DONE) 1036 return 0; 1037 delay(1000); 1038 count--; 1039 } 1040 return 1; 1041 } 1042 1043 void 1044 ahb_timeout(arg) 1045 void *arg; 1046 { 1047 struct ahb_ecb *ecb = arg; 1048 struct scsipi_xfer *xs = ecb->xs; 1049 struct scsipi_periph *periph = xs->xs_periph; 1050 struct ahb_softc *sc = 1051 (void *)periph->periph_channel->chan_adapter->adapt_dev; 1052 int s; 1053 1054 scsipi_printaddr(periph); 1055 printf("timed out"); 1056 1057 s = splbio(); 1058 1059 if (ecb->flags & ECB_IMMED) { 1060 printf("\n"); 1061 ecb->flags |= ECB_IMMED_FAIL; 1062 /* XXX Must reset! */ 1063 } else 1064 1065 /* 1066 * If it has been through before, then 1067 * a previous abort has failed, don't 1068 * try abort again 1069 */ 1070 if (ecb->flags & ECB_ABORT) { 1071 /* abort timed out */ 1072 printf(" AGAIN\n"); 1073 /* XXX Must reset! */ 1074 } else { 1075 /* abort the operation that has timed out */ 1076 printf("\n"); 1077 ecb->xs->error = XS_TIMEOUT; 1078 ecb->timeout = AHB_ABORT_TIMEOUT; 1079 ecb->flags |= ECB_ABORT; 1080 ahb_send_mbox(sc, OP_ABORT_ECB, ecb); 1081 } 1082 1083 splx(s); 1084 } 1085
Indexes created Wed Oct 15 16:09:53 GMT 2025