ahb.c revision 1.33
1 /* $NetBSD: ahb.c,v 1.33 2001/11/13 12:47:33 lukem 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 * Originally written by Julian Elischer (julian (at) tfs.com) 42 * for TRW Financial Systems for use under the MACH(2.5) operating system. 43 * 44 * TRW Financial Systems, in accordance with their agreement with Carnegie 45 * Mellon University, makes this software available to CMU to distribute 46 * or use in any manner that they see fit as long as this message is kept with 47 * the software. For this reason TFS also grants any other persons or 48 * organisations permission to use or modify this software. 49 * 50 * TFS supplies this software to be publicly redistributed 51 * on the understanding that TFS is not responsible for the correct 52 * functioning of this software in any circumstances. 53 */ 54 55 #include <sys/cdefs.h> 56 __KERNEL_RCSID(0, "$NetBSD: ahb.c,v 1.33 2001/11/13 12:47:33 lukem Exp $"); 57 58 #include "opt_ddb.h" 59 60 #undef AHBDEBUG 61 #ifdef DDB 62 #define integrate 63 #else 64 #define integrate static inline 65 #endif 66 67 #include <sys/types.h> 68 #include <sys/param.h> 69 #include <sys/systm.h> 70 #include <sys/kernel.h> 71 #include <sys/errno.h> 72 #include <sys/ioctl.h> 73 #include <sys/device.h> 74 #include <sys/malloc.h> 75 #include <sys/buf.h> 76 #include <sys/proc.h> 77 #include <sys/user.h> 78 79 #include <uvm/uvm_extern.h> 80 81 #include <machine/bus.h> 82 #include <machine/intr.h> 83 84 #include <dev/scsipi/scsi_all.h> 85 #include <dev/scsipi/scsipi_all.h> 86 #include <dev/scsipi/scsiconf.h> 87 88 #include <dev/eisa/eisareg.h> 89 #include <dev/eisa/eisavar.h> 90 #include <dev/eisa/eisadevs.h> 91 #include <dev/eisa/ahbreg.h> 92 93 #ifndef DDB 94 #define Debugger() panic("should call debugger here (aha1742.c)") 95 #endif /* ! DDB */ 96 97 #define AHB_ECB_MAX 32 /* store up to 32 ECBs at one time */ 98 #define ECB_HASH_SIZE 32 /* hash table size for phystokv */ 99 #define ECB_HASH_SHIFT 9 100 #define ECB_HASH(x) ((((long)(x))>>ECB_HASH_SHIFT) & (ECB_HASH_SIZE - 1)) 101 102 #define AHB_MAXXFER ((AHB_NSEG - 1) << PGSHIFT) 103 104 struct ahb_softc { 105 struct device sc_dev; 106 107 bus_space_tag_t sc_iot; 108 bus_space_handle_t sc_ioh; 109 bus_dma_tag_t sc_dmat; 110 void *sc_ih; 111 112 bus_dmamap_t sc_dmamap_ecb; /* maps the ecbs */ 113 struct ahb_ecb *sc_ecbs; /* all our ecbs */ 114 115 struct ahb_ecb *sc_ecbhash[ECB_HASH_SIZE]; 116 TAILQ_HEAD(, ahb_ecb) sc_free_ecb; 117 struct ahb_ecb *sc_immed_ecb; /* an outstanding immediete command */ 118 int sc_numecbs; 119 120 struct scsipi_adapter sc_adapter; 121 struct scsipi_channel sc_channel; 122 }; 123 124 /* 125 * Offset of an ECB from the beginning of the ECB DMA mapping. 126 */ 127 #define AHB_ECB_OFF(e) (((u_long)(e)) - ((u_long)&sc->sc_ecbs[0])) 128 129 struct ahb_probe_data { 130 int sc_irq; 131 int sc_scsi_dev; 132 }; 133 134 void ahb_send_mbox __P((struct ahb_softc *, int, struct ahb_ecb *)); 135 void ahb_send_immed __P((struct ahb_softc *, u_int32_t, struct ahb_ecb *)); 136 int ahbintr __P((void *)); 137 void ahb_free_ecb __P((struct ahb_softc *, struct ahb_ecb *)); 138 struct ahb_ecb *ahb_get_ecb __P((struct ahb_softc *)); 139 struct ahb_ecb *ahb_ecb_phys_kv __P((struct ahb_softc *, physaddr)); 140 void ahb_done __P((struct ahb_softc *, struct ahb_ecb *)); 141 int ahb_find __P((bus_space_tag_t, bus_space_handle_t, struct ahb_probe_data *)); 142 int ahb_init __P((struct ahb_softc *)); 143 void ahbminphys __P((struct buf *)); 144 void ahb_scsipi_request __P((struct scsipi_channel *, 145 scsipi_adapter_req_t, void *)); 146 int ahb_poll __P((struct ahb_softc *, struct scsipi_xfer *, int)); 147 void ahb_timeout __P((void *)); 148 int ahb_create_ecbs __P((struct ahb_softc *, struct ahb_ecb *, int)); 149 150 integrate void ahb_reset_ecb __P((struct ahb_softc *, struct ahb_ecb *)); 151 integrate int ahb_init_ecb __P((struct ahb_softc *, struct ahb_ecb *)); 152 153 int ahbmatch __P((struct device *, struct cfdata *, void *)); 154 void ahbattach __P((struct device *, struct device *, void *)); 155 156 struct cfattach ahb_ca = { 157 sizeof(struct ahb_softc), ahbmatch, ahbattach 158 }; 159 160 #define AHB_ABORT_TIMEOUT 2000 /* time to wait for abort (mSec) */ 161 162 /* 163 * Check the slots looking for a board we recognise 164 * If we find one, note it's address (slot) and call 165 * the actual probe routine to check it out. 166 */ 167 int 168 ahbmatch(parent, match, aux) 169 struct device *parent; 170 struct cfdata *match; 171 void *aux; 172 { 173 struct eisa_attach_args *ea = aux; 174 bus_space_tag_t iot = ea->ea_iot; 175 bus_space_handle_t ioh; 176 int rv; 177 178 /* must match one of our known ID strings */ 179 if (strcmp(ea->ea_idstring, "ADP0000") && 180 strcmp(ea->ea_idstring, "ADP0001") && 181 strcmp(ea->ea_idstring, "ADP0002") && 182 strcmp(ea->ea_idstring, "ADP0400")) 183 return (0); 184 185 if (bus_space_map(iot, 186 EISA_SLOT_ADDR(ea->ea_slot) + AHB_EISA_SLOT_OFFSET, AHB_EISA_IOSIZE, 187 0, &ioh)) 188 return (0); 189 190 rv = !ahb_find(iot, ioh, NULL); 191 192 bus_space_unmap(iot, ioh, AHB_EISA_IOSIZE); 193 194 return (rv); 195 } 196 197 /* 198 * Attach all the sub-devices we can find 199 */ 200 void 201 ahbattach(parent, self, aux) 202 struct device *parent, *self; 203 void *aux; 204 { 205 struct eisa_attach_args *ea = aux; 206 struct ahb_softc *sc = (void *)self; 207 bus_space_tag_t iot = ea->ea_iot; 208 bus_space_handle_t ioh; 209 eisa_chipset_tag_t ec = ea->ea_ec; 210 eisa_intr_handle_t ih; 211 const char *model, *intrstr; 212 struct ahb_probe_data apd; 213 struct scsipi_adapter *adapt = &sc->sc_adapter; 214 struct scsipi_channel *chan = &sc->sc_channel; 215 216 if (!strcmp(ea->ea_idstring, "ADP0000")) 217 model = EISA_PRODUCT_ADP0000; 218 else if (!strcmp(ea->ea_idstring, "ADP0001")) 219 model = EISA_PRODUCT_ADP0001; 220 else if (!strcmp(ea->ea_idstring, "ADP0002")) 221 model = EISA_PRODUCT_ADP0002; 222 else if (!strcmp(ea->ea_idstring, "ADP0400")) 223 model = EISA_PRODUCT_ADP0400; 224 else 225 model = "unknown model!"; 226 printf(": %s\n", model); 227 228 if (bus_space_map(iot, 229 EISA_SLOT_ADDR(ea->ea_slot) + AHB_EISA_SLOT_OFFSET, AHB_EISA_IOSIZE, 230 0, &ioh)) 231 panic("ahbattach: could not map I/O addresses"); 232 233 sc->sc_iot = iot; 234 sc->sc_ioh = ioh; 235 sc->sc_dmat = ea->ea_dmat; 236 if (ahb_find(iot, ioh, &apd)) 237 panic("ahbattach: ahb_find failed!"); 238 239 TAILQ_INIT(&sc->sc_free_ecb); 240 241 /* 242 * Fill in the scsipi_adapter. 243 */ 244 memset(adapt, 0, sizeof(*adapt)); 245 adapt->adapt_dev = &sc->sc_dev; 246 adapt->adapt_nchannels = 1; 247 /* adapt_openings initialized below */ 248 adapt->adapt_max_periph = 4; /* XXX arbitrary? */ 249 adapt->adapt_request = ahb_scsipi_request; 250 adapt->adapt_minphys = ahbminphys; 251 252 /* 253 * Fill in the scsipi_channel. 254 */ 255 memset(chan, 0, sizeof(*chan)); 256 chan->chan_adapter = adapt; 257 chan->chan_bustype = &scsi_bustype; 258 chan->chan_channel = 0; 259 chan->chan_ntargets = 8; 260 chan->chan_nluns = 8; 261 chan->chan_id = apd.sc_scsi_dev; 262 263 if (ahb_init(sc) != 0) { 264 /* Error during initialization! */ 265 return; 266 } 267 268 if (eisa_intr_map(ec, apd.sc_irq, &ih)) { 269 printf("%s: couldn't map interrupt (%d)\n", 270 sc->sc_dev.dv_xname, apd.sc_irq); 271 return; 272 } 273 intrstr = eisa_intr_string(ec, ih); 274 sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO, 275 ahbintr, sc); 276 if (sc->sc_ih == NULL) { 277 printf("%s: couldn't establish interrupt", 278 sc->sc_dev.dv_xname); 279 if (intrstr != NULL) 280 printf(" at %s", intrstr); 281 printf("\n"); 282 return; 283 } 284 if (intrstr != NULL) 285 printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, 286 intrstr); 287 288 /* 289 * ask the adapter what subunits are present 290 */ 291 config_found(self, &sc->sc_channel, scsiprint); 292 } 293 294 /* 295 * Function to send a command out through a mailbox 296 */ 297 void 298 ahb_send_mbox(sc, opcode, ecb) 299 struct ahb_softc *sc; 300 int opcode; 301 struct ahb_ecb *ecb; 302 { 303 bus_space_tag_t iot = sc->sc_iot; 304 bus_space_handle_t ioh = sc->sc_ioh; 305 int wait = 300; /* 1ms should be enough */ 306 307 while (--wait) { 308 if ((bus_space_read_1(iot, ioh, G2STAT) & (G2STAT_BUSY | G2STAT_MBOX_EMPTY)) 309 == (G2STAT_MBOX_EMPTY)) 310 break; 311 delay(10); 312 } 313 if (!wait) { 314 printf("%s: board not responding\n", sc->sc_dev.dv_xname); 315 Debugger(); 316 } 317 318 /* 319 * don't know if this will work. 320 * XXX WHAT DOES THIS COMMENT MEAN?! --thorpej 321 */ 322 bus_space_write_4(iot, ioh, MBOXOUT0, 323 sc->sc_dmamap_ecb->dm_segs[0].ds_addr + AHB_ECB_OFF(ecb)); 324 bus_space_write_1(iot, ioh, ATTN, opcode | 325 ecb->xs->xs_periph->periph_target); 326 327 if ((ecb->xs->xs_control & XS_CTL_POLL) == 0) 328 callout_reset(&ecb->xs->xs_callout, 329 (ecb->timeout * hz) / 1000, ahb_timeout, ecb); 330 } 331 332 /* 333 * Function to send an immediate type command to the adapter 334 */ 335 void 336 ahb_send_immed(sc, cmd, ecb) 337 struct ahb_softc *sc; 338 u_int32_t cmd; 339 struct ahb_ecb *ecb; 340 { 341 bus_space_tag_t iot = sc->sc_iot; 342 bus_space_handle_t ioh = sc->sc_ioh; 343 int wait = 100; /* 1 ms enough? */ 344 345 while (--wait) { 346 if ((bus_space_read_1(iot, ioh, G2STAT) & (G2STAT_BUSY | G2STAT_MBOX_EMPTY)) 347 == (G2STAT_MBOX_EMPTY)) 348 break; 349 delay(10); 350 } 351 if (!wait) { 352 printf("%s: board not responding\n", sc->sc_dev.dv_xname); 353 Debugger(); 354 } 355 356 bus_space_write_4(iot, ioh, MBOXOUT0, cmd); /* don't know this will work */ 357 bus_space_write_1(iot, ioh, G2CNTRL, G2CNTRL_SET_HOST_READY); 358 bus_space_write_1(iot, ioh, ATTN, OP_IMMED | 359 ecb->xs->xs_periph->periph_target); 360 361 if ((ecb->xs->xs_control & XS_CTL_POLL) == 0) 362 callout_reset(&ecb->xs->xs_callout, 363 (ecb->timeout * hz) / 1000, ahb_timeout, ecb); 364 } 365 366 /* 367 * Catch an interrupt from the adaptor 368 */ 369 int 370 ahbintr(arg) 371 void *arg; 372 { 373 struct ahb_softc *sc = arg; 374 bus_space_tag_t iot = sc->sc_iot; 375 bus_space_handle_t ioh = sc->sc_ioh; 376 struct ahb_ecb *ecb; 377 u_char ahbstat; 378 u_int32_t mboxval; 379 380 #ifdef AHBDEBUG 381 printf("%s: ahbintr ", sc->sc_dev.dv_xname); 382 #endif /* AHBDEBUG */ 383 384 if ((bus_space_read_1(iot, ioh, G2STAT) & G2STAT_INT_PEND) == 0) 385 return 0; 386 387 for (;;) { 388 /* 389 * First get all the information and then 390 * acknowlege the interrupt 391 */ 392 ahbstat = bus_space_read_1(iot, ioh, G2INTST); 393 mboxval = bus_space_read_4(iot, ioh, MBOXIN0); 394 bus_space_write_1(iot, ioh, G2CNTRL, G2CNTRL_CLEAR_EISA_INT); 395 396 #ifdef AHBDEBUG 397 printf("status = 0x%x ", ahbstat); 398 #endif /* AHBDEBUG */ 399 400 /* 401 * Process the completed operation 402 */ 403 switch (ahbstat & G2INTST_INT_STAT) { 404 case AHB_ECB_OK: 405 case AHB_ECB_RECOVERED: 406 case AHB_ECB_ERR: 407 ecb = ahb_ecb_phys_kv(sc, mboxval); 408 if (!ecb) { 409 printf("%s: BAD ECB RETURNED!\n", 410 sc->sc_dev.dv_xname); 411 goto next; /* whatever it was, it'll timeout */ 412 } 413 break; 414 415 case AHB_IMMED_ERR: 416 ecb = sc->sc_immed_ecb; 417 sc->sc_immed_ecb = 0; 418 ecb->flags |= ECB_IMMED_FAIL; 419 break; 420 421 case AHB_IMMED_OK: 422 ecb = sc->sc_immed_ecb; 423 sc->sc_immed_ecb = 0; 424 break; 425 426 default: 427 printf("%s: unexpected interrupt %x\n", 428 sc->sc_dev.dv_xname, ahbstat); 429 goto next; 430 } 431 432 callout_stop(&ecb->xs->xs_callout); 433 ahb_done(sc, ecb); 434 435 next: 436 if ((bus_space_read_1(iot, ioh, G2STAT) & G2STAT_INT_PEND) == 0) 437 return 1; 438 } 439 } 440 441 integrate void 442 ahb_reset_ecb(sc, ecb) 443 struct ahb_softc *sc; 444 struct ahb_ecb *ecb; 445 { 446 447 ecb->flags = 0; 448 } 449 450 /* 451 * A ecb (and hence a mbx-out is put onto the 452 * free list. 453 */ 454 void 455 ahb_free_ecb(sc, ecb) 456 struct ahb_softc *sc; 457 struct ahb_ecb *ecb; 458 { 459 int s; 460 461 s = splbio(); 462 ahb_reset_ecb(sc, ecb); 463 TAILQ_INSERT_HEAD(&sc->sc_free_ecb, ecb, chain); 464 splx(s); 465 } 466 467 /* 468 * Create a set of ecbs and add them to the free list. 469 */ 470 integrate int 471 ahb_init_ecb(sc, ecb) 472 struct ahb_softc *sc; 473 struct ahb_ecb *ecb; 474 { 475 bus_dma_tag_t dmat = sc->sc_dmat; 476 int hashnum, error; 477 478 /* 479 * Create the DMA map for this ECB. 480 */ 481 error = bus_dmamap_create(dmat, AHB_MAXXFER, AHB_NSEG, AHB_MAXXFER, 482 0, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW, &ecb->dmamap_xfer); 483 if (error) { 484 printf("%s: can't create ecb dmamap_xfer\n", 485 sc->sc_dev.dv_xname); 486 return (error); 487 } 488 489 /* 490 * put in the phystokv hash table 491 * Never gets taken out. 492 */ 493 ecb->hashkey = sc->sc_dmamap_ecb->dm_segs[0].ds_addr + 494 AHB_ECB_OFF(ecb); 495 hashnum = ECB_HASH(ecb->hashkey); 496 ecb->nexthash = sc->sc_ecbhash[hashnum]; 497 sc->sc_ecbhash[hashnum] = ecb; 498 ahb_reset_ecb(sc, ecb); 499 return (0); 500 } 501 502 int 503 ahb_create_ecbs(sc, ecbstore, count) 504 struct ahb_softc *sc; 505 struct ahb_ecb *ecbstore; 506 int count; 507 { 508 struct ahb_ecb *ecb; 509 int i, error; 510 511 bzero(ecbstore, sizeof(struct ahb_ecb) * count); 512 for (i = 0; i < count; i++) { 513 ecb = &ecbstore[i]; 514 if ((error = ahb_init_ecb(sc, ecb)) != 0) { 515 printf("%s: unable to initialize ecb, error = %d\n", 516 sc->sc_dev.dv_xname, error); 517 goto out; 518 } 519 TAILQ_INSERT_TAIL(&sc->sc_free_ecb, ecb, chain); 520 } 521 out: 522 return (i); 523 } 524 525 /* 526 * Get a free ecb 527 * 528 * If there are none, see if we can allocate a new one. If so, put it in the 529 * hash table too otherwise either return an error or sleep. 530 */ 531 struct ahb_ecb * 532 ahb_get_ecb(sc) 533 struct ahb_softc *sc; 534 { 535 struct ahb_ecb *ecb; 536 int s; 537 538 s = splbio(); 539 ecb = TAILQ_FIRST(&sc->sc_free_ecb); 540 if (ecb != NULL) { 541 TAILQ_REMOVE(&sc->sc_free_ecb, ecb, chain); 542 ecb->flags |= ECB_ALLOC; 543 } 544 splx(s); 545 return (ecb); 546 } 547 548 /* 549 * given a physical address, find the ecb that it corresponds to. 550 */ 551 struct ahb_ecb * 552 ahb_ecb_phys_kv(sc, ecb_phys) 553 struct ahb_softc *sc; 554 physaddr ecb_phys; 555 { 556 int hashnum = ECB_HASH(ecb_phys); 557 struct ahb_ecb *ecb = sc->sc_ecbhash[hashnum]; 558 559 while (ecb) { 560 if (ecb->hashkey == ecb_phys) 561 break; 562 ecb = ecb->nexthash; 563 } 564 return ecb; 565 } 566 567 /* 568 * We have a ecb which has been processed by the adaptor, now we look to see 569 * how the operation went. 570 */ 571 void 572 ahb_done(sc, ecb) 573 struct ahb_softc *sc; 574 struct ahb_ecb *ecb; 575 { 576 bus_dma_tag_t dmat = sc->sc_dmat; 577 struct scsipi_sense_data *s1, *s2; 578 struct scsipi_xfer *xs = ecb->xs; 579 580 SC_DEBUG(xs->xs_periph, SCSIPI_DB2, ("ahb_done\n")); 581 582 bus_dmamap_sync(dmat, sc->sc_dmamap_ecb, 583 AHB_ECB_OFF(ecb), sizeof(struct ahb_ecb), 584 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 585 586 /* 587 * If we were a data transfer, unload the map that described 588 * the data buffer. 589 */ 590 if (xs->datalen) { 591 bus_dmamap_sync(dmat, ecb->dmamap_xfer, 0, 592 ecb->dmamap_xfer->dm_mapsize, 593 (xs->xs_control & XS_CTL_DATA_IN) ? BUS_DMASYNC_POSTREAD : 594 BUS_DMASYNC_POSTWRITE); 595 bus_dmamap_unload(dmat, ecb->dmamap_xfer); 596 } 597 598 /* 599 * Otherwise, put the results of the operation 600 * into the xfer and call whoever started it 601 */ 602 if ((ecb->flags & ECB_ALLOC) == 0) { 603 printf("%s: exiting ecb not allocated!\n", sc->sc_dev.dv_xname); 604 Debugger(); 605 } 606 if (ecb->flags & ECB_IMMED) { 607 if (ecb->flags & ECB_IMMED_FAIL) 608 xs->error = XS_DRIVER_STUFFUP; 609 goto done; 610 } 611 if (xs->error == XS_NOERROR) { 612 if (ecb->ecb_status.host_stat != HS_OK) { 613 switch (ecb->ecb_status.host_stat) { 614 case HS_TIMED_OUT: /* No response */ 615 xs->error = XS_SELTIMEOUT; 616 break; 617 default: /* Other scsi protocol messes */ 618 printf("%s: host_stat %x\n", 619 sc->sc_dev.dv_xname, ecb->ecb_status.host_stat); 620 xs->error = XS_DRIVER_STUFFUP; 621 } 622 } else if (ecb->ecb_status.target_stat != SCSI_OK) { 623 switch (ecb->ecb_status.target_stat) { 624 case SCSI_CHECK: 625 s1 = &ecb->ecb_sense; 626 s2 = &xs->sense.scsi_sense; 627 *s2 = *s1; 628 xs->error = XS_SENSE; 629 break; 630 case SCSI_BUSY: 631 xs->error = XS_BUSY; 632 break; 633 default: 634 printf("%s: target_stat %x\n", 635 sc->sc_dev.dv_xname, ecb->ecb_status.target_stat); 636 xs->error = XS_DRIVER_STUFFUP; 637 } 638 } else 639 xs->resid = 0; 640 } 641 done: 642 ahb_free_ecb(sc, ecb); 643 scsipi_done(xs); 644 } 645 646 /* 647 * Start the board, ready for normal operation 648 */ 649 int 650 ahb_find(iot, ioh, sc) 651 bus_space_tag_t iot; 652 bus_space_handle_t ioh; 653 struct ahb_probe_data *sc; 654 { 655 u_char intdef; 656 int i, irq, busid; 657 int wait = 1000; /* 1 sec enough? */ 658 659 bus_space_write_1(iot, ioh, PORTADDR, PORTADDR_ENHANCED); 660 661 #define NO_NO 1 662 #ifdef NO_NO 663 /* 664 * reset board, If it doesn't respond, assume 665 * that it's not there.. good for the probe 666 */ 667 bus_space_write_1(iot, ioh, G2CNTRL, G2CNTRL_HARD_RESET); 668 delay(1000); 669 bus_space_write_1(iot, ioh, G2CNTRL, 0); 670 delay(10000); 671 while (--wait) { 672 if ((bus_space_read_1(iot, ioh, G2STAT) & G2STAT_BUSY) == 0) 673 break; 674 delay(1000); 675 } 676 if (!wait) { 677 #ifdef AHBDEBUG 678 printf("ahb_find: No answer from aha1742 board\n"); 679 #endif /* AHBDEBUG */ 680 return ENXIO; 681 } 682 i = bus_space_read_1(iot, ioh, MBOXIN0); 683 if (i) { 684 printf("self test failed, val = 0x%x\n", i); 685 return EIO; 686 } 687 688 /* Set it again, just to be sure. */ 689 bus_space_write_1(iot, ioh, PORTADDR, PORTADDR_ENHANCED); 690 #endif 691 692 while (bus_space_read_1(iot, ioh, G2STAT) & G2STAT_INT_PEND) { 693 printf("."); 694 bus_space_write_1(iot, ioh, G2CNTRL, G2CNTRL_CLEAR_EISA_INT); 695 delay(10000); 696 } 697 698 intdef = bus_space_read_1(iot, ioh, INTDEF); 699 switch (intdef & 0x07) { 700 case INT9: 701 irq = 9; 702 break; 703 case INT10: 704 irq = 10; 705 break; 706 case INT11: 707 irq = 11; 708 break; 709 case INT12: 710 irq = 12; 711 break; 712 case INT14: 713 irq = 14; 714 break; 715 case INT15: 716 irq = 15; 717 break; 718 default: 719 printf("illegal int setting %x\n", intdef); 720 return EIO; 721 } 722 723 bus_space_write_1(iot, ioh, INTDEF, (intdef | INTEN)); /* make sure we can interrupt */ 724 725 /* who are we on the scsi bus? */ 726 busid = (bus_space_read_1(iot, ioh, SCSIDEF) & HSCSIID); 727 728 /* if we want to return data, do so now */ 729 if (sc) { 730 sc->sc_irq = irq; 731 sc->sc_scsi_dev = busid; 732 } 733 734 /* 735 * Note that we are going and return (to probe) 736 */ 737 return 0; 738 } 739 740 int 741 ahb_init(sc) 742 struct ahb_softc *sc; 743 { 744 bus_dma_segment_t seg; 745 int i, error, rseg; 746 747 #define ECBSIZE (AHB_ECB_MAX * sizeof(struct ahb_ecb)) 748 749 /* 750 * Allocate the ECBs. 751 */ 752 if ((error = bus_dmamem_alloc(sc->sc_dmat, ECBSIZE, 753 PAGE_SIZE, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) { 754 printf("%s: unable to allocate ecbs, error = %d\n", 755 sc->sc_dev.dv_xname, error); 756 return (error); 757 } 758 if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, 759 ECBSIZE, (caddr_t *)&sc->sc_ecbs, 760 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 761 printf("%s: unable to map ecbs, error = %d\n", 762 sc->sc_dev.dv_xname, error); 763 return (error); 764 } 765 766 /* 767 * Create and load the DMA map used for the ecbs. 768 */ 769 if ((error = bus_dmamap_create(sc->sc_dmat, ECBSIZE, 770 1, ECBSIZE, 0, BUS_DMA_NOWAIT, &sc->sc_dmamap_ecb)) != 0) { 771 printf("%s: unable to create ecb DMA map, error = %d\n", 772 sc->sc_dev.dv_xname, error); 773 return (error); 774 } 775 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_dmamap_ecb, 776 sc->sc_ecbs, ECBSIZE, NULL, BUS_DMA_NOWAIT)) != 0) { 777 printf("%s: unable to load ecb DMA map, error = %d\n", 778 sc->sc_dev.dv_xname, error); 779 return (error); 780 } 781 782 #undef ECBSIZE 783 784 /* 785 * Initialize the ecbs. 786 */ 787 i = ahb_create_ecbs(sc, sc->sc_ecbs, AHB_ECB_MAX); 788 if (i == 0) { 789 printf("%s: unable to create ecbs\n", 790 sc->sc_dev.dv_xname); 791 return (ENOMEM); 792 } else if (i != AHB_ECB_MAX) { 793 printf("%s: WARNING: only %d of %d ecbs created\n", 794 sc->sc_dev.dv_xname, i, AHB_ECB_MAX); 795 } 796 797 sc->sc_adapter.adapt_openings = i; 798 799 return (0); 800 } 801 802 void 803 ahbminphys(bp) 804 struct buf *bp; 805 { 806 807 if (bp->b_bcount > AHB_MAXXFER) 808 bp->b_bcount = AHB_MAXXFER; 809 minphys(bp); 810 } 811 812 /* 813 * start a scsi operation given the command and the data address. Also needs 814 * the unit, target and lu. 815 */ 816 void 817 ahb_scsipi_request(chan, req, arg) 818 struct scsipi_channel *chan; 819 scsipi_adapter_req_t req; 820 void *arg; 821 { 822 struct scsipi_xfer *xs; 823 struct scsipi_periph *periph; 824 struct ahb_softc *sc = (void *)chan->chan_adapter->adapt_dev; 825 bus_dma_tag_t dmat = sc->sc_dmat; 826 struct ahb_ecb *ecb; 827 int error, seg, flags, s; 828 829 switch (req) { 830 case ADAPTER_REQ_RUN_XFER: 831 xs = arg; 832 periph = xs->xs_periph; 833 flags = xs->xs_control; 834 835 SC_DEBUG(periph, SCSIPI_DB2, ("ahb_scsipi_request\n")); 836 837 /* Get an ECB to use. */ 838 ecb = ahb_get_ecb(sc); 839 #ifdef DIAGNOSTIC 840 /* 841 * This should never happen as we track the resources 842 * in the mid-layer. 843 */ 844 if (ecb == NULL) { 845 scsipi_printaddr(periph); 846 printf("unable to allocate ecb\n"); 847 panic("ahb_scsipi_request"); 848 } 849 #endif 850 851 ecb->xs = xs; 852 ecb->timeout = xs->timeout; 853 854 /* 855 * If it's a reset, we need to do an 'immediate' 856 * command, and store its ecb for later 857 * if there is already an immediate waiting, 858 * then WE must wait 859 */ 860 if (flags & XS_CTL_RESET) { 861 ecb->flags |= ECB_IMMED; 862 if (sc->sc_immed_ecb) { 863 ahb_free_ecb(sc, ecb); 864 xs->error = XS_BUSY; 865 scsipi_done(xs); 866 return; 867 } 868 sc->sc_immed_ecb = ecb; 869 870 s = splbio(); 871 ahb_send_immed(sc, AHB_TARG_RESET, ecb); 872 splx(s); 873 874 if ((flags & XS_CTL_POLL) == 0) 875 return; 876 877 /* 878 * If we can't use interrupts, poll on completion 879 */ 880 if (ahb_poll(sc, xs, ecb->timeout)) 881 ahb_timeout(ecb); 882 return; 883 } 884 885 /* 886 * Put all the arguments for the xfer in the ecb 887 */ 888 ecb->opcode = ECB_SCSI_OP; 889 ecb->opt1 = ECB_SES /*| ECB_DSB*/ | ECB_ARS; 890 ecb->opt2 = periph->periph_lun | ECB_NRB; 891 bcopy(xs->cmd, &ecb->scsi_cmd, 892 ecb->scsi_cmd_length = xs->cmdlen); 893 ecb->sense_ptr = sc->sc_dmamap_ecb->dm_segs[0].ds_addr + 894 AHB_ECB_OFF(ecb) + offsetof(struct ahb_ecb, ecb_sense); 895 ecb->req_sense_length = sizeof(ecb->ecb_sense); 896 ecb->status = sc->sc_dmamap_ecb->dm_segs[0].ds_addr + 897 AHB_ECB_OFF(ecb) + offsetof(struct ahb_ecb, ecb_status); 898 ecb->ecb_status.host_stat = 0x00; 899 ecb->ecb_status.target_stat = 0x00; 900 901 if (xs->datalen) { 902 /* 903 * Map the DMA transfer. 904 */ 905 #ifdef TFS 906 if (flags & XS_CTL_DATA_UIO) { 907 error = bus_dmamap_load_uio(sc->sc_dmat, 908 ecb->dmamap_xfer, (struct uio *)xs->data, 909 BUS_DMA_NOWAIT); 910 } else 911 #endif /* TFS */ 912 { 913 error = bus_dmamap_load(sc->sc_dmat, 914 ecb->dmamap_xfer, xs->data, xs->datalen, 915 NULL, BUS_DMA_NOWAIT); 916 } 917 918 switch (error) { 919 case 0: 920 break; 921 922 case ENOMEM: 923 case EAGAIN: 924 xs->error = XS_RESOURCE_SHORTAGE; 925 goto out_bad; 926 927 default: 928 xs->error = XS_DRIVER_STUFFUP; 929 printf("%s: error %d loading DMA map\n", 930 sc->sc_dev.dv_xname, error); 931 out_bad: 932 ahb_free_ecb(sc, ecb); 933 scsipi_done(xs); 934 return; 935 } 936 937 bus_dmamap_sync(dmat, ecb->dmamap_xfer, 0, 938 ecb->dmamap_xfer->dm_mapsize, 939 (flags & XS_CTL_DATA_IN) ? BUS_DMASYNC_PREREAD : 940 BUS_DMASYNC_PREWRITE); 941 942 /* 943 * Load the hardware scatter/gather map with the 944 * contents of the DMA map. 945 */ 946 for (seg = 0; seg < ecb->dmamap_xfer->dm_nsegs; seg++) { 947 ecb->ahb_dma[seg].seg_addr = 948 ecb->dmamap_xfer->dm_segs[seg].ds_addr; 949 ecb->ahb_dma[seg].seg_len = 950 ecb->dmamap_xfer->dm_segs[seg].ds_len; 951 } 952 953 ecb->data_addr = sc->sc_dmamap_ecb->dm_segs[0].ds_addr + 954 AHB_ECB_OFF(ecb) + 955 offsetof(struct ahb_ecb, ahb_dma); 956 ecb->data_length = ecb->dmamap_xfer->dm_nsegs * 957 sizeof(struct ahb_dma_seg); 958 ecb->opt1 |= ECB_S_G; 959 } else { /* No data xfer, use non S/G values */ 960 ecb->data_addr = (physaddr)0; 961 ecb->data_length = 0; 962 } 963 ecb->link_addr = (physaddr)0; 964 965 bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap_ecb, 966 AHB_ECB_OFF(ecb), sizeof(struct ahb_ecb), 967 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 968 969 s = splbio(); 970 ahb_send_mbox(sc, OP_START_ECB, ecb); 971 splx(s); 972 973 if ((flags & XS_CTL_POLL) == 0) 974 return; 975 976 /* 977 * If we can't use interrupts, poll on completion 978 */ 979 if (ahb_poll(sc, xs, ecb->timeout)) { 980 ahb_timeout(ecb); 981 if (ahb_poll(sc, xs, ecb->timeout)) 982 ahb_timeout(ecb); 983 } 984 return; 985 986 case ADAPTER_REQ_GROW_RESOURCES: 987 /* XXX Not supported. */ 988 return; 989 990 case ADAPTER_REQ_SET_XFER_MODE: 991 /* XXX How do we do this? */ 992 return; 993 } 994 } 995 996 /* 997 * Function to poll for command completion when in poll mode 998 */ 999 int 1000 ahb_poll(sc, xs, count) 1001 struct ahb_softc *sc; 1002 struct scsipi_xfer *xs; 1003 int count; 1004 { /* in msec */ 1005 bus_space_tag_t iot = sc->sc_iot; 1006 bus_space_handle_t ioh = sc->sc_ioh; 1007 1008 while (count) { 1009 /* 1010 * If we had interrupts enabled, would we 1011 * have got an interrupt? 1012 */ 1013 if (bus_space_read_1(iot, ioh, G2STAT) & G2STAT_INT_PEND) 1014 ahbintr(sc); 1015 if (xs->xs_status & XS_STS_DONE) 1016 return 0; 1017 delay(1000); 1018 count--; 1019 } 1020 return 1; 1021 } 1022 1023 void 1024 ahb_timeout(arg) 1025 void *arg; 1026 { 1027 struct ahb_ecb *ecb = arg; 1028 struct scsipi_xfer *xs = ecb->xs; 1029 struct scsipi_periph *periph = xs->xs_periph; 1030 struct ahb_softc *sc = 1031 (void *)periph->periph_channel->chan_adapter->adapt_dev; 1032 int s; 1033 1034 scsipi_printaddr(periph); 1035 printf("timed out"); 1036 1037 s = splbio(); 1038 1039 if (ecb->flags & ECB_IMMED) { 1040 printf("\n"); 1041 ecb->flags |= ECB_IMMED_FAIL; 1042 /* XXX Must reset! */ 1043 } else 1044 1045 /* 1046 * If it has been through before, then 1047 * a previous abort has failed, don't 1048 * try abort again 1049 */ 1050 if (ecb->flags & ECB_ABORT) { 1051 /* abort timed out */ 1052 printf(" AGAIN\n"); 1053 /* XXX Must reset! */ 1054 } else { 1055 /* abort the operation that has timed out */ 1056 printf("\n"); 1057 ecb->xs->error = XS_TIMEOUT; 1058 ecb->timeout = AHB_ABORT_TIMEOUT; 1059 ecb->flags |= ECB_ABORT; 1060 ahb_send_mbox(sc, OP_ABORT_ECB, ecb); 1061 } 1062 1063 splx(s); 1064 } 1065
Indexes created Mon Sep 29 21:09:56 GMT 2025