ahb.c revision 1.28.2.4
1 /* $NetBSD: ahb.c,v 1.28.2.4 1999/11/01 22:54:14 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 *)); 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 ahb_reset_ecb(sc, ecb); 456 TAILQ_INSERT_HEAD(&sc->sc_free_ecb, ecb, chain); 457 splx(s); 458 } 459 460 /* 461 * Create a set of ecbs and add them to the free list. 462 */ 463 integrate int 464 ahb_init_ecb(sc, ecb) 465 struct ahb_softc *sc; 466 struct ahb_ecb *ecb; 467 { 468 bus_dma_tag_t dmat = sc->sc_dmat; 469 int hashnum, error; 470 471 /* 472 * Create the DMA map for this ECB. 473 */ 474 error = bus_dmamap_create(dmat, AHB_MAXXFER, AHB_NSEG, AHB_MAXXFER, 475 0, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW, &ecb->dmamap_xfer); 476 if (error) { 477 printf("%s: can't create ecb dmamap_xfer\n", 478 sc->sc_dev.dv_xname); 479 return (error); 480 } 481 482 /* 483 * put in the phystokv hash table 484 * Never gets taken out. 485 */ 486 ecb->hashkey = sc->sc_dmamap_ecb->dm_segs[0].ds_addr + 487 AHB_ECB_OFF(ecb); 488 hashnum = ECB_HASH(ecb->hashkey); 489 ecb->nexthash = sc->sc_ecbhash[hashnum]; 490 sc->sc_ecbhash[hashnum] = ecb; 491 ahb_reset_ecb(sc, ecb); 492 return (0); 493 } 494 495 int 496 ahb_create_ecbs(sc, ecbstore, count) 497 struct ahb_softc *sc; 498 struct ahb_ecb *ecbstore; 499 int count; 500 { 501 struct ahb_ecb *ecb; 502 int i, error; 503 504 bzero(ecbstore, sizeof(struct ahb_ecb) * count); 505 for (i = 0; i < count; i++) { 506 ecb = &ecbstore[i]; 507 if ((error = ahb_init_ecb(sc, ecb)) != 0) { 508 printf("%s: unable to initialize ecb, error = %d\n", 509 sc->sc_dev.dv_xname, error); 510 goto out; 511 } 512 TAILQ_INSERT_TAIL(&sc->sc_free_ecb, ecb, chain); 513 } 514 out: 515 return (i); 516 } 517 518 /* 519 * Get a free ecb 520 * 521 * If there are none, see if we can allocate a new one. If so, put it in the 522 * hash table too otherwise either return an error or sleep. 523 */ 524 struct ahb_ecb * 525 ahb_get_ecb(sc) 526 struct ahb_softc *sc; 527 { 528 struct ahb_ecb *ecb; 529 int s; 530 531 s = splbio(); 532 ecb = TAILQ_FIRST(&sc->sc_free_ecb); 533 if (ecb != NULL) { 534 TAILQ_REMOVE(&sc->sc_free_ecb, ecb, chain); 535 ecb->flags |= ECB_ALLOC; 536 } 537 splx(s); 538 return (ecb); 539 } 540 541 /* 542 * given a physical address, find the ecb that it corresponds to. 543 */ 544 struct ahb_ecb * 545 ahb_ecb_phys_kv(sc, ecb_phys) 546 struct ahb_softc *sc; 547 physaddr ecb_phys; 548 { 549 int hashnum = ECB_HASH(ecb_phys); 550 struct ahb_ecb *ecb = sc->sc_ecbhash[hashnum]; 551 552 while (ecb) { 553 if (ecb->hashkey == ecb_phys) 554 break; 555 ecb = ecb->nexthash; 556 } 557 return ecb; 558 } 559 560 /* 561 * We have a ecb which has been processed by the adaptor, now we look to see 562 * how the operation went. 563 */ 564 void 565 ahb_done(sc, ecb) 566 struct ahb_softc *sc; 567 struct ahb_ecb *ecb; 568 { 569 bus_dma_tag_t dmat = sc->sc_dmat; 570 struct scsipi_sense_data *s1, *s2; 571 struct scsipi_xfer *xs = ecb->xs; 572 573 SC_DEBUG(xs->xs_periph, SCSIPI_DB2, ("ahb_done\n")); 574 575 bus_dmamap_sync(dmat, sc->sc_dmamap_ecb, 576 AHB_ECB_OFF(ecb), sizeof(struct ahb_ecb), 577 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 578 579 /* 580 * If we were a data transfer, unload the map that described 581 * the data buffer. 582 */ 583 if (xs->datalen) { 584 bus_dmamap_sync(dmat, ecb->dmamap_xfer, 0, 585 ecb->dmamap_xfer->dm_mapsize, 586 (xs->xs_control & XS_CTL_DATA_IN) ? BUS_DMASYNC_POSTREAD : 587 BUS_DMASYNC_POSTWRITE); 588 bus_dmamap_unload(dmat, ecb->dmamap_xfer); 589 } 590 591 /* 592 * Otherwise, put the results of the operation 593 * into the xfer and call whoever started it 594 */ 595 if ((ecb->flags & ECB_ALLOC) == 0) { 596 printf("%s: exiting ecb not allocated!\n", sc->sc_dev.dv_xname); 597 Debugger(); 598 } 599 if (ecb->flags & ECB_IMMED) { 600 if (ecb->flags & ECB_IMMED_FAIL) 601 xs->error = XS_DRIVER_STUFFUP; 602 goto done; 603 } 604 if (xs->error == XS_NOERROR) { 605 if (ecb->ecb_status.host_stat != HS_OK) { 606 switch (ecb->ecb_status.host_stat) { 607 case HS_TIMED_OUT: /* No response */ 608 xs->error = XS_SELTIMEOUT; 609 break; 610 default: /* Other scsi protocol messes */ 611 printf("%s: host_stat %x\n", 612 sc->sc_dev.dv_xname, ecb->ecb_status.host_stat); 613 xs->error = XS_DRIVER_STUFFUP; 614 } 615 } else if (ecb->ecb_status.target_stat != SCSI_OK) { 616 switch (ecb->ecb_status.target_stat) { 617 case SCSI_CHECK: 618 s1 = &ecb->ecb_sense; 619 s2 = &xs->sense.scsi_sense; 620 *s2 = *s1; 621 xs->error = XS_SENSE; 622 break; 623 case SCSI_BUSY: 624 xs->error = XS_BUSY; 625 break; 626 default: 627 printf("%s: target_stat %x\n", 628 sc->sc_dev.dv_xname, ecb->ecb_status.target_stat); 629 xs->error = XS_DRIVER_STUFFUP; 630 } 631 } else 632 xs->resid = 0; 633 } 634 done: 635 ahb_free_ecb(sc, ecb); 636 scsipi_done(xs); 637 } 638 639 /* 640 * Start the board, ready for normal operation 641 */ 642 int 643 ahb_find(iot, ioh, sc) 644 bus_space_tag_t iot; 645 bus_space_handle_t ioh; 646 struct ahb_probe_data *sc; 647 { 648 u_char intdef; 649 int i, irq, busid; 650 int wait = 1000; /* 1 sec enough? */ 651 652 bus_space_write_1(iot, ioh, PORTADDR, PORTADDR_ENHANCED); 653 654 #define NO_NO 1 655 #ifdef NO_NO 656 /* 657 * reset board, If it doesn't respond, assume 658 * that it's not there.. good for the probe 659 */ 660 bus_space_write_1(iot, ioh, G2CNTRL, G2CNTRL_HARD_RESET); 661 delay(1000); 662 bus_space_write_1(iot, ioh, G2CNTRL, 0); 663 delay(10000); 664 while (--wait) { 665 if ((bus_space_read_1(iot, ioh, G2STAT) & G2STAT_BUSY) == 0) 666 break; 667 delay(1000); 668 } 669 if (!wait) { 670 #ifdef AHBDEBUG 671 printf("ahb_find: No answer from aha1742 board\n"); 672 #endif /* AHBDEBUG */ 673 return ENXIO; 674 } 675 i = bus_space_read_1(iot, ioh, MBOXIN0); 676 if (i) { 677 printf("self test failed, val = 0x%x\n", i); 678 return EIO; 679 } 680 681 /* Set it again, just to be sure. */ 682 bus_space_write_1(iot, ioh, PORTADDR, PORTADDR_ENHANCED); 683 #endif 684 685 while (bus_space_read_1(iot, ioh, G2STAT) & G2STAT_INT_PEND) { 686 printf("."); 687 bus_space_write_1(iot, ioh, G2CNTRL, G2CNTRL_CLEAR_EISA_INT); 688 delay(10000); 689 } 690 691 intdef = bus_space_read_1(iot, ioh, INTDEF); 692 switch (intdef & 0x07) { 693 case INT9: 694 irq = 9; 695 break; 696 case INT10: 697 irq = 10; 698 break; 699 case INT11: 700 irq = 11; 701 break; 702 case INT12: 703 irq = 12; 704 break; 705 case INT14: 706 irq = 14; 707 break; 708 case INT15: 709 irq = 15; 710 break; 711 default: 712 printf("illegal int setting %x\n", intdef); 713 return EIO; 714 } 715 716 bus_space_write_1(iot, ioh, INTDEF, (intdef | INTEN)); /* make sure we can interrupt */ 717 718 /* who are we on the scsi bus? */ 719 busid = (bus_space_read_1(iot, ioh, SCSIDEF) & HSCSIID); 720 721 /* if we want to return data, do so now */ 722 if (sc) { 723 sc->sc_irq = irq; 724 sc->sc_scsi_dev = busid; 725 } 726 727 /* 728 * Note that we are going and return (to probe) 729 */ 730 return 0; 731 } 732 733 int 734 ahb_init(sc) 735 struct ahb_softc *sc; 736 { 737 bus_dma_segment_t seg; 738 int i, error, rseg; 739 740 #define ECBSIZE (AHB_ECB_MAX * sizeof(struct ahb_ecb)) 741 742 /* 743 * Allocate the ECBs. 744 */ 745 if ((error = bus_dmamem_alloc(sc->sc_dmat, ECBSIZE, 746 NBPG, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) { 747 printf("%s: unable to allocate ecbs, error = %d\n", 748 sc->sc_dev.dv_xname, error); 749 return (error); 750 } 751 if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, 752 ECBSIZE, (caddr_t *)&sc->sc_ecbs, 753 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 754 printf("%s: unable to map ecbs, error = %d\n", 755 sc->sc_dev.dv_xname, error); 756 return (error); 757 } 758 759 /* 760 * Create and load the DMA map used for the ecbs. 761 */ 762 if ((error = bus_dmamap_create(sc->sc_dmat, ECBSIZE, 763 1, ECBSIZE, 0, BUS_DMA_NOWAIT, &sc->sc_dmamap_ecb)) != 0) { 764 printf("%s: unable to create ecb DMA map, error = %d\n", 765 sc->sc_dev.dv_xname, error); 766 return (error); 767 } 768 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_dmamap_ecb, 769 sc->sc_ecbs, ECBSIZE, NULL, BUS_DMA_NOWAIT)) != 0) { 770 printf("%s: unable to load ecb DMA map, error = %d\n", 771 sc->sc_dev.dv_xname, error); 772 return (error); 773 } 774 775 #undef ECBSIZE 776 777 /* 778 * Initialize the ecbs. 779 */ 780 i = ahb_create_ecbs(sc, sc->sc_ecbs, AHB_ECB_MAX); 781 if (i == 0) { 782 printf("%s: unable to create ecbs\n", 783 sc->sc_dev.dv_xname); 784 return (ENOMEM); 785 } else if (i != AHB_ECB_MAX) { 786 printf("%s: WARNING: only %d of %d ecbs created\n", 787 sc->sc_dev.dv_xname, i, AHB_ECB_MAX); 788 } 789 790 sc->sc_adapter.adapt_openings = i; 791 792 return (0); 793 } 794 795 void 796 ahbminphys(bp) 797 struct buf *bp; 798 { 799 800 if (bp->b_bcount > AHB_MAXXFER) 801 bp->b_bcount = AHB_MAXXFER; 802 minphys(bp); 803 } 804 805 /* 806 * start a scsi operation given the command and the data address. Also needs 807 * the unit, target and lu. 808 */ 809 void 810 ahb_scsipi_request(chan, req, arg) 811 struct scsipi_channel *chan; 812 scsipi_adapter_req_t req; 813 void *arg; 814 { 815 struct scsipi_xfer *xs; 816 struct scsipi_periph *periph; 817 struct ahb_softc *sc = (void *)chan->chan_adapter->adapt_dev; 818 bus_dma_tag_t dmat = sc->sc_dmat; 819 struct ahb_ecb *ecb; 820 int error, seg, flags, s; 821 822 switch (req) { 823 case ADAPTER_REQ_RUN_XFER: 824 xs = arg; 825 periph = xs->xs_periph; 826 flags = xs->xs_control; 827 828 SC_DEBUG(periph, SCSIPI_DB2, ("ahb_scsipi_request\n")); 829 830 /* Get an ECB to use. */ 831 ecb = ahb_get_ecb(sc); 832 #ifdef DIAGNOSTIC 833 /* 834 * This should never happen as we track the resources 835 * in the mid-layer. 836 */ 837 if (ecb == NULL) { 838 scsipi_printaddr(periph); 839 printf("unable to allocate ecb\n"); 840 panic("ahb_scsipi_request"); 841 } 842 #endif 843 844 ecb->xs = xs; 845 ecb->timeout = xs->timeout; 846 847 /* 848 * If it's a reset, we need to do an 'immediate' 849 * command, and store its ecb for later 850 * if there is already an immediate waiting, 851 * then WE must wait 852 */ 853 if (flags & XS_CTL_RESET) { 854 ecb->flags |= ECB_IMMED; 855 if (sc->sc_immed_ecb) { 856 ahb_free_ecb(sc, ecb); 857 xs->error = XS_BUSY; 858 scsipi_done(xs); 859 return; 860 } 861 sc->sc_immed_ecb = ecb; 862 863 s = splbio(); 864 ahb_send_immed(sc, AHB_TARG_RESET, ecb); 865 splx(s); 866 867 if ((flags & XS_CTL_POLL) == 0) 868 return; 869 870 /* 871 * If we can't use interrupts, poll on completion 872 */ 873 if (ahb_poll(sc, xs, ecb->timeout)) 874 ahb_timeout(ecb); 875 return; 876 } 877 878 /* 879 * Put all the arguments for the xfer in the ecb 880 */ 881 ecb->opcode = ECB_SCSI_OP; 882 ecb->opt1 = ECB_SES /*| ECB_DSB*/ | ECB_ARS; 883 ecb->opt2 = periph->periph_lun | ECB_NRB; 884 bcopy(xs->cmd, &ecb->scsi_cmd, 885 ecb->scsi_cmd_length = xs->cmdlen); 886 ecb->sense_ptr = sc->sc_dmamap_ecb->dm_segs[0].ds_addr + 887 AHB_ECB_OFF(ecb) + offsetof(struct ahb_ecb, ecb_sense); 888 ecb->req_sense_length = sizeof(ecb->ecb_sense); 889 ecb->status = sc->sc_dmamap_ecb->dm_segs[0].ds_addr + 890 AHB_ECB_OFF(ecb) + offsetof(struct ahb_ecb, ecb_status); 891 ecb->ecb_status.host_stat = 0x00; 892 ecb->ecb_status.target_stat = 0x00; 893 894 if (xs->datalen) { 895 /* 896 * Map the DMA transfer. 897 */ 898 #ifdef TFS 899 if (flags & XS_CTL_DATA_UIO) { 900 error = bus_dmamap_load_uio(sc->sc_dmat, 901 ecb->dmamap_xfer, (struct uio *)xs->data, 902 BUS_DMA_NOWAIT); 903 } else 904 #endif /* TFS */ 905 { 906 error = bus_dmamap_load(sc->sc_dmat, 907 ecb->dmamap_xfer, xs->data, xs->datalen, 908 NULL, BUS_DMA_NOWAIT); 909 } 910 911 switch (error) { 912 case 0: 913 break; 914 915 case ENOMEM: 916 case EAGAIN: 917 xs->error = XS_RESOURCE_SHORTAGE; 918 goto out_bad; 919 920 default: 921 xs->error = XS_DRIVER_STUFFUP; 922 printf("%s: error %d loading DMA map\n", 923 sc->sc_dev.dv_xname, error); 924 out_bad: 925 ahb_free_ecb(sc, ecb); 926 scsipi_done(xs); 927 return; 928 } 929 930 bus_dmamap_sync(dmat, ecb->dmamap_xfer, 0, 931 ecb->dmamap_xfer->dm_mapsize, 932 (flags & XS_CTL_DATA_IN) ? BUS_DMASYNC_PREREAD : 933 BUS_DMASYNC_PREWRITE); 934 935 /* 936 * Load the hardware scatter/gather map with the 937 * contents of the DMA map. 938 */ 939 for (seg = 0; seg < ecb->dmamap_xfer->dm_nsegs; seg++) { 940 ecb->ahb_dma[seg].seg_addr = 941 ecb->dmamap_xfer->dm_segs[seg].ds_addr; 942 ecb->ahb_dma[seg].seg_len = 943 ecb->dmamap_xfer->dm_segs[seg].ds_len; 944 } 945 946 ecb->data_addr = sc->sc_dmamap_ecb->dm_segs[0].ds_addr + 947 AHB_ECB_OFF(ecb) + 948 offsetof(struct ahb_ecb, ahb_dma); 949 ecb->data_length = ecb->dmamap_xfer->dm_nsegs * 950 sizeof(struct ahb_dma_seg); 951 ecb->opt1 |= ECB_S_G; 952 } else { /* No data xfer, use non S/G values */ 953 ecb->data_addr = (physaddr)0; 954 ecb->data_length = 0; 955 } 956 ecb->link_addr = (physaddr)0; 957 958 bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap_ecb, 959 AHB_ECB_OFF(ecb), sizeof(struct ahb_ecb), 960 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 961 962 s = splbio(); 963 ahb_send_mbox(sc, OP_START_ECB, ecb); 964 splx(s); 965 966 if ((flags & XS_CTL_POLL) == 0) 967 return; 968 969 /* 970 * If we can't use interrupts, poll on completion 971 */ 972 if (ahb_poll(sc, xs, ecb->timeout)) { 973 ahb_timeout(ecb); 974 if (ahb_poll(sc, xs, ecb->timeout)) 975 ahb_timeout(ecb); 976 } 977 return; 978 979 case ADAPTER_REQ_GROW_RESOURCES: 980 /* XXX Not supported. */ 981 return; 982 983 case ADAPTER_REQ_SET_XFER_MODE: 984 /* XXX How do we do this? */ 985 return; 986 } 987 } 988 989 /* 990 * Function to poll for command completion when in poll mode 991 */ 992 int 993 ahb_poll(sc, xs, count) 994 struct ahb_softc *sc; 995 struct scsipi_xfer *xs; 996 int count; 997 { /* in msec */ 998 bus_space_tag_t iot = sc->sc_iot; 999 bus_space_handle_t ioh = sc->sc_ioh; 1000 1001 while (count) { 1002 /* 1003 * If we had interrupts enabled, would we 1004 * have got an interrupt? 1005 */ 1006 if (bus_space_read_1(iot, ioh, G2STAT) & G2STAT_INT_PEND) 1007 ahbintr(sc); 1008 if (xs->xs_status & XS_STS_DONE) 1009 return 0; 1010 delay(1000); 1011 count--; 1012 } 1013 return 1; 1014 } 1015 1016 void 1017 ahb_timeout(arg) 1018 void *arg; 1019 { 1020 struct ahb_ecb *ecb = arg; 1021 struct scsipi_xfer *xs = ecb->xs; 1022 struct scsipi_periph *periph = xs->xs_periph; 1023 struct ahb_softc *sc = 1024 (void *)periph->periph_channel->chan_adapter->adapt_dev; 1025 int s; 1026 1027 scsipi_printaddr(periph); 1028 printf("timed out"); 1029 1030 s = splbio(); 1031 1032 if (ecb->flags & ECB_IMMED) { 1033 printf("\n"); 1034 ecb->flags |= ECB_IMMED_FAIL; 1035 /* XXX Must reset! */ 1036 } else 1037 1038 /* 1039 * If it has been through before, then 1040 * a previous abort has failed, don't 1041 * try abort again 1042 */ 1043 if (ecb->flags & ECB_ABORT) { 1044 /* abort timed out */ 1045 printf(" AGAIN\n"); 1046 /* XXX Must reset! */ 1047 } else { 1048 /* abort the operation that has timed out */ 1049 printf("\n"); 1050 ecb->xs->error = XS_TIMEOUT; 1051 ecb->timeout = AHB_ABORT_TIMEOUT; 1052 ecb->flags |= ECB_ABORT; 1053 ahb_send_mbox(sc, OP_ABORT_ECB, ecb); 1054 } 1055 1056 splx(s); 1057 } 1058
Indexes created Wed Oct 15 16:09:53 GMT 2025