ahb.c revision 1.45
1 /* $NetBSD: ahb.c,v 1.45 2006/03/29 06:32:36 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 * 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 1.45 2006/03/29 06:32:36 thorpej Exp $"); 57 58 #include "opt_ddb.h" 59 60 #undef AHBDEBUG 61 62 #include <sys/param.h> 63 #include <sys/systm.h> 64 #include <sys/kernel.h> 65 #include <sys/errno.h> 66 #include <sys/ioctl.h> 67 #include <sys/device.h> 68 #include <sys/malloc.h> 69 #include <sys/buf.h> 70 #include <sys/proc.h> 71 #include <sys/user.h> 72 73 #include <uvm/uvm_extern.h> 74 75 #include <machine/bus.h> 76 #include <machine/intr.h> 77 78 #include <dev/scsipi/scsi_all.h> 79 #include <dev/scsipi/scsipi_all.h> 80 #include <dev/scsipi/scsiconf.h> 81 82 #include <dev/eisa/eisareg.h> 83 #include <dev/eisa/eisavar.h> 84 #include <dev/eisa/eisadevs.h> 85 #include <dev/eisa/ahbreg.h> 86 87 #ifndef DDB 88 #define Debugger() panic("should call debugger here (aha1742.c)") 89 #endif /* ! DDB */ 90 91 #define AHB_ECB_MAX 32 /* store up to 32 ECBs at one time */ 92 #define ECB_HASH_SIZE 32 /* hash table size for phystokv */ 93 #define ECB_HASH_SHIFT 9 94 #define ECB_HASH(x) ((((long)(x))>>ECB_HASH_SHIFT) & (ECB_HASH_SIZE - 1)) 95 96 #define AHB_MAXXFER ((AHB_NSEG - 1) << PGSHIFT) 97 98 struct ahb_softc { 99 struct device sc_dev; 100 101 bus_space_tag_t sc_iot; 102 bus_space_handle_t sc_ioh; 103 bus_dma_tag_t sc_dmat; 104 void *sc_ih; 105 106 bus_dmamap_t sc_dmamap_ecb; /* maps the ecbs */ 107 struct ahb_ecb *sc_ecbs; /* all our ecbs */ 108 109 struct ahb_ecb *sc_ecbhash[ECB_HASH_SIZE]; 110 TAILQ_HEAD(, ahb_ecb) sc_free_ecb; 111 struct ahb_ecb *sc_immed_ecb; /* an outstanding immediete command */ 112 int sc_numecbs; 113 114 struct scsipi_adapter sc_adapter; 115 struct scsipi_channel sc_channel; 116 }; 117 118 /* 119 * Offset of an ECB from the beginning of the ECB DMA mapping. 120 */ 121 #define AHB_ECB_OFF(e) (((u_long)(e)) - ((u_long)&sc->sc_ecbs[0])) 122 123 struct ahb_probe_data { 124 int sc_irq; 125 int sc_scsi_dev; 126 }; 127 128 static void ahb_send_mbox(struct ahb_softc *, int, struct ahb_ecb *); 129 static void ahb_send_immed(struct ahb_softc *, u_int32_t, struct ahb_ecb *); 130 static int ahbintr(void *); 131 static void ahb_free_ecb(struct ahb_softc *, struct ahb_ecb *); 132 static struct ahb_ecb *ahb_get_ecb(struct ahb_softc *); 133 static struct ahb_ecb *ahb_ecb_phys_kv(struct ahb_softc *, physaddr); 134 static void ahb_done(struct ahb_softc *, struct ahb_ecb *); 135 static int ahb_find(bus_space_tag_t, bus_space_handle_t, 136 struct ahb_probe_data *); 137 static int ahb_init(struct ahb_softc *); 138 static void ahbminphys(struct buf *); 139 static void ahb_scsipi_request(struct scsipi_channel *, 140 scsipi_adapter_req_t, void *); 141 static int ahb_poll(struct ahb_softc *, struct scsipi_xfer *, int); 142 static void ahb_timeout(void *); 143 static int ahb_create_ecbs(struct ahb_softc *, struct ahb_ecb *, int); 144 145 static int ahb_init_ecb(struct ahb_softc *, struct ahb_ecb *); 146 147 static int ahbmatch(struct device *, struct cfdata *, void *); 148 static void ahbattach(struct device *, struct device *, void *); 149 150 CFATTACH_DECL(ahb, sizeof(struct ahb_softc), 151 ahbmatch, ahbattach, NULL, NULL); 152 153 #define AHB_ABORT_TIMEOUT 2000 /* time to wait for abort (mSec) */ 154 155 /* 156 * Check the slots looking for a board we recognise 157 * If we find one, note it's address (slot) and call 158 * the actual probe routine to check it out. 159 */ 160 static int 161 ahbmatch(struct device *parent, struct cfdata *match, void *aux) 162 { 163 struct eisa_attach_args *ea = aux; 164 bus_space_tag_t iot = ea->ea_iot; 165 bus_space_handle_t ioh; 166 int rv; 167 168 /* must match one of our known ID strings */ 169 if (strcmp(ea->ea_idstring, "ADP0000") && 170 strcmp(ea->ea_idstring, "ADP0001") && 171 strcmp(ea->ea_idstring, "ADP0002") && 172 strcmp(ea->ea_idstring, "ADP0400")) 173 return (0); 174 175 if (bus_space_map(iot, 176 EISA_SLOT_ADDR(ea->ea_slot) + AHB_EISA_SLOT_OFFSET, AHB_EISA_IOSIZE, 177 0, &ioh)) 178 return (0); 179 180 rv = !ahb_find(iot, ioh, NULL); 181 182 bus_space_unmap(iot, ioh, AHB_EISA_IOSIZE); 183 184 return (rv); 185 } 186 187 /* 188 * Attach all the sub-devices we can find 189 */ 190 static void 191 ahbattach(struct device *parent, struct device *self, void *aux) 192 { 193 struct eisa_attach_args *ea = aux; 194 struct ahb_softc *sc = device_private(self); 195 bus_space_tag_t iot = ea->ea_iot; 196 bus_space_handle_t ioh; 197 eisa_chipset_tag_t ec = ea->ea_ec; 198 eisa_intr_handle_t ih; 199 const char *model, *intrstr; 200 struct ahb_probe_data apd; 201 struct scsipi_adapter *adapt = &sc->sc_adapter; 202 struct scsipi_channel *chan = &sc->sc_channel; 203 204 if (!strcmp(ea->ea_idstring, "ADP0000")) 205 model = EISA_PRODUCT_ADP0000; 206 else if (!strcmp(ea->ea_idstring, "ADP0001")) 207 model = EISA_PRODUCT_ADP0001; 208 else if (!strcmp(ea->ea_idstring, "ADP0002")) 209 model = EISA_PRODUCT_ADP0002; 210 else if (!strcmp(ea->ea_idstring, "ADP0400")) 211 model = EISA_PRODUCT_ADP0400; 212 else 213 model = "unknown model!"; 214 printf(": %s\n", model); 215 216 if (bus_space_map(iot, 217 EISA_SLOT_ADDR(ea->ea_slot) + AHB_EISA_SLOT_OFFSET, AHB_EISA_IOSIZE, 218 0, &ioh)) 219 panic("ahbattach: could not map I/O addresses"); 220 221 sc->sc_iot = iot; 222 sc->sc_ioh = ioh; 223 sc->sc_dmat = ea->ea_dmat; 224 if (ahb_find(iot, ioh, &apd)) 225 panic("ahbattach: ahb_find failed!"); 226 227 TAILQ_INIT(&sc->sc_free_ecb); 228 229 /* 230 * Fill in the scsipi_adapter. 231 */ 232 memset(adapt, 0, sizeof(*adapt)); 233 adapt->adapt_dev = &sc->sc_dev; 234 adapt->adapt_nchannels = 1; 235 /* adapt_openings initialized below */ 236 adapt->adapt_max_periph = 4; /* XXX arbitrary? */ 237 adapt->adapt_request = ahb_scsipi_request; 238 adapt->adapt_minphys = ahbminphys; 239 240 /* 241 * Fill in the scsipi_channel. 242 */ 243 memset(chan, 0, sizeof(*chan)); 244 chan->chan_adapter = adapt; 245 chan->chan_bustype = &scsi_bustype; 246 chan->chan_channel = 0; 247 chan->chan_ntargets = 8; 248 chan->chan_nluns = 8; 249 chan->chan_id = apd.sc_scsi_dev; 250 251 if (ahb_init(sc) != 0) { 252 /* Error during initialization! */ 253 return; 254 } 255 256 if (eisa_intr_map(ec, apd.sc_irq, &ih)) { 257 printf("%s: couldn't map interrupt (%d)\n", 258 sc->sc_dev.dv_xname, apd.sc_irq); 259 return; 260 } 261 intrstr = eisa_intr_string(ec, ih); 262 sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO, 263 ahbintr, sc); 264 if (sc->sc_ih == NULL) { 265 printf("%s: couldn't establish interrupt", 266 sc->sc_dev.dv_xname); 267 if (intrstr != NULL) 268 printf(" at %s", intrstr); 269 printf("\n"); 270 return; 271 } 272 if (intrstr != NULL) 273 printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, 274 intrstr); 275 276 /* 277 * ask the adapter what subunits are present 278 */ 279 config_found(self, &sc->sc_channel, scsiprint); 280 } 281 282 /* 283 * Function to send a command out through a mailbox 284 */ 285 static void 286 ahb_send_mbox(struct ahb_softc *sc, int opcode, struct ahb_ecb *ecb) 287 { 288 bus_space_tag_t iot = sc->sc_iot; 289 bus_space_handle_t ioh = sc->sc_ioh; 290 int wait = 300; /* 1ms should be enough */ 291 292 while (--wait) { 293 if ((bus_space_read_1(iot, ioh, G2STAT) & (G2STAT_BUSY | G2STAT_MBOX_EMPTY)) 294 == (G2STAT_MBOX_EMPTY)) 295 break; 296 delay(10); 297 } 298 if (!wait) { 299 printf("%s: board not responding\n", sc->sc_dev.dv_xname); 300 Debugger(); 301 } 302 303 /* 304 * don't know if this will work. 305 * XXX WHAT DOES THIS COMMENT MEAN?! --thorpej 306 */ 307 bus_space_write_4(iot, ioh, MBOXOUT0, 308 sc->sc_dmamap_ecb->dm_segs[0].ds_addr + AHB_ECB_OFF(ecb)); 309 bus_space_write_1(iot, ioh, ATTN, opcode | 310 ecb->xs->xs_periph->periph_target); 311 312 if ((ecb->xs->xs_control & XS_CTL_POLL) == 0) 313 callout_reset(&ecb->xs->xs_callout, 314 mstohz(ecb->timeout), ahb_timeout, ecb); 315 } 316 317 /* 318 * Function to send an immediate type command to the adapter 319 */ 320 static void 321 ahb_send_immed(struct ahb_softc *sc, u_int32_t cmd, struct ahb_ecb *ecb) 322 { 323 bus_space_tag_t iot = sc->sc_iot; 324 bus_space_handle_t ioh = sc->sc_ioh; 325 int wait = 100; /* 1 ms enough? */ 326 327 while (--wait) { 328 if ((bus_space_read_1(iot, ioh, G2STAT) & (G2STAT_BUSY | G2STAT_MBOX_EMPTY)) 329 == (G2STAT_MBOX_EMPTY)) 330 break; 331 delay(10); 332 } 333 if (!wait) { 334 printf("%s: board not responding\n", sc->sc_dev.dv_xname); 335 Debugger(); 336 } 337 338 bus_space_write_4(iot, ioh, MBOXOUT0, cmd); /* don't know this will work */ 339 bus_space_write_1(iot, ioh, G2CNTRL, G2CNTRL_SET_HOST_READY); 340 bus_space_write_1(iot, ioh, ATTN, OP_IMMED | 341 ecb->xs->xs_periph->periph_target); 342 343 if ((ecb->xs->xs_control & XS_CTL_POLL) == 0) 344 callout_reset(&ecb->xs->xs_callout, 345 mstohz(ecb->timeout), ahb_timeout, ecb); 346 } 347 348 /* 349 * Catch an interrupt from the adaptor 350 */ 351 static int 352 ahbintr(void *arg) 353 { 354 struct ahb_softc *sc = arg; 355 bus_space_tag_t iot = sc->sc_iot; 356 bus_space_handle_t ioh = sc->sc_ioh; 357 struct ahb_ecb *ecb; 358 u_char ahbstat; 359 u_int32_t mboxval; 360 361 #ifdef AHBDEBUG 362 printf("%s: ahbintr ", sc->sc_dev.dv_xname); 363 #endif /* AHBDEBUG */ 364 365 if ((bus_space_read_1(iot, ioh, G2STAT) & G2STAT_INT_PEND) == 0) 366 return 0; 367 368 for (;;) { 369 /* 370 * First get all the information and then 371 * acknowledge the interrupt 372 */ 373 ahbstat = bus_space_read_1(iot, ioh, G2INTST); 374 mboxval = bus_space_read_4(iot, ioh, MBOXIN0); 375 bus_space_write_1(iot, ioh, G2CNTRL, G2CNTRL_CLEAR_EISA_INT); 376 377 #ifdef AHBDEBUG 378 printf("status = 0x%x ", ahbstat); 379 #endif /* AHBDEBUG */ 380 381 /* 382 * Process the completed operation 383 */ 384 switch (ahbstat & G2INTST_INT_STAT) { 385 case AHB_ECB_OK: 386 case AHB_ECB_RECOVERED: 387 case AHB_ECB_ERR: 388 ecb = ahb_ecb_phys_kv(sc, mboxval); 389 if (!ecb) { 390 printf("%s: BAD ECB RETURNED!\n", 391 sc->sc_dev.dv_xname); 392 goto next; /* whatever it was, it'll timeout */ 393 } 394 break; 395 396 case AHB_IMMED_ERR: 397 ecb = sc->sc_immed_ecb; 398 sc->sc_immed_ecb = 0; 399 ecb->flags |= ECB_IMMED_FAIL; 400 break; 401 402 case AHB_IMMED_OK: 403 ecb = sc->sc_immed_ecb; 404 sc->sc_immed_ecb = 0; 405 break; 406 407 default: 408 printf("%s: unexpected interrupt %x\n", 409 sc->sc_dev.dv_xname, ahbstat); 410 goto next; 411 } 412 413 callout_stop(&ecb->xs->xs_callout); 414 ahb_done(sc, ecb); 415 416 next: 417 if ((bus_space_read_1(iot, ioh, G2STAT) & G2STAT_INT_PEND) == 0) 418 return 1; 419 } 420 } 421 422 static inline void 423 ahb_reset_ecb(struct ahb_softc *sc, struct ahb_ecb *ecb) 424 { 425 426 ecb->flags = 0; 427 } 428 429 /* 430 * A ecb (and hence a mbx-out is put onto the 431 * free list. 432 */ 433 static void 434 ahb_free_ecb(struct ahb_softc *sc, struct ahb_ecb *ecb) 435 { 436 int s; 437 438 s = splbio(); 439 ahb_reset_ecb(sc, ecb); 440 TAILQ_INSERT_HEAD(&sc->sc_free_ecb, ecb, chain); 441 splx(s); 442 } 443 444 /* 445 * Create a set of ecbs and add them to the free list. 446 */ 447 static int 448 ahb_init_ecb(struct ahb_softc *sc, struct ahb_ecb *ecb) 449 { 450 bus_dma_tag_t dmat = sc->sc_dmat; 451 int hashnum, error; 452 453 /* 454 * Create the DMA map for this ECB. 455 */ 456 error = bus_dmamap_create(dmat, AHB_MAXXFER, AHB_NSEG, AHB_MAXXFER, 457 0, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW, &ecb->dmamap_xfer); 458 if (error) { 459 printf("%s: can't create ecb dmamap_xfer\n", 460 sc->sc_dev.dv_xname); 461 return (error); 462 } 463 464 /* 465 * put in the phystokv hash table 466 * Never gets taken out. 467 */ 468 ecb->hashkey = sc->sc_dmamap_ecb->dm_segs[0].ds_addr + 469 AHB_ECB_OFF(ecb); 470 hashnum = ECB_HASH(ecb->hashkey); 471 ecb->nexthash = sc->sc_ecbhash[hashnum]; 472 sc->sc_ecbhash[hashnum] = ecb; 473 ahb_reset_ecb(sc, ecb); 474 return (0); 475 } 476 477 static int 478 ahb_create_ecbs(struct ahb_softc *sc, struct ahb_ecb *ecbstore, int count) 479 { 480 struct ahb_ecb *ecb; 481 int i, error; 482 483 bzero(ecbstore, sizeof(struct ahb_ecb) * count); 484 for (i = 0; i < count; i++) { 485 ecb = &ecbstore[i]; 486 if ((error = ahb_init_ecb(sc, ecb)) != 0) { 487 printf("%s: unable to initialize ecb, error = %d\n", 488 sc->sc_dev.dv_xname, error); 489 goto out; 490 } 491 TAILQ_INSERT_TAIL(&sc->sc_free_ecb, ecb, chain); 492 } 493 out: 494 return (i); 495 } 496 497 /* 498 * Get a free ecb 499 * 500 * If there are none, see if we can allocate a new one. If so, put it in the 501 * hash table too otherwise either return an error or sleep. 502 */ 503 static struct ahb_ecb * 504 ahb_get_ecb(struct ahb_softc *sc) 505 { 506 struct ahb_ecb *ecb; 507 int s; 508 509 s = splbio(); 510 ecb = TAILQ_FIRST(&sc->sc_free_ecb); 511 if (ecb != NULL) { 512 TAILQ_REMOVE(&sc->sc_free_ecb, ecb, chain); 513 ecb->flags |= ECB_ALLOC; 514 } 515 splx(s); 516 return (ecb); 517 } 518 519 /* 520 * given a physical address, find the ecb that it corresponds to. 521 */ 522 static struct ahb_ecb * 523 ahb_ecb_phys_kv(struct ahb_softc *sc, physaddr ecb_phys) 524 { 525 int hashnum = ECB_HASH(ecb_phys); 526 struct ahb_ecb *ecb = sc->sc_ecbhash[hashnum]; 527 528 while (ecb) { 529 if (ecb->hashkey == ecb_phys) 530 break; 531 ecb = ecb->nexthash; 532 } 533 return ecb; 534 } 535 536 /* 537 * We have a ecb which has been processed by the adaptor, now we look to see 538 * how the operation went. 539 */ 540 static void 541 ahb_done(struct ahb_softc *sc, struct ahb_ecb *ecb) 542 { 543 bus_dma_tag_t dmat = sc->sc_dmat; 544 struct scsi_sense_data *s1, *s2; 545 struct scsipi_xfer *xs = ecb->xs; 546 547 SC_DEBUG(xs->xs_periph, SCSIPI_DB2, ("ahb_done\n")); 548 549 bus_dmamap_sync(dmat, sc->sc_dmamap_ecb, 550 AHB_ECB_OFF(ecb), sizeof(struct ahb_ecb), 551 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 552 553 /* 554 * If we were a data transfer, unload the map that described 555 * the data buffer. 556 */ 557 if (xs->datalen) { 558 bus_dmamap_sync(dmat, ecb->dmamap_xfer, 0, 559 ecb->dmamap_xfer->dm_mapsize, 560 (xs->xs_control & XS_CTL_DATA_IN) ? BUS_DMASYNC_POSTREAD : 561 BUS_DMASYNC_POSTWRITE); 562 bus_dmamap_unload(dmat, ecb->dmamap_xfer); 563 } 564 565 /* 566 * Otherwise, put the results of the operation 567 * into the xfer and call whoever started it 568 */ 569 if ((ecb->flags & ECB_ALLOC) == 0) { 570 printf("%s: exiting ecb not allocated!\n", sc->sc_dev.dv_xname); 571 Debugger(); 572 } 573 if (ecb->flags & ECB_IMMED) { 574 if (ecb->flags & ECB_IMMED_FAIL) 575 xs->error = XS_DRIVER_STUFFUP; 576 goto done; 577 } 578 if (xs->error == XS_NOERROR) { 579 if (ecb->ecb_status.host_stat != HS_OK) { 580 switch (ecb->ecb_status.host_stat) { 581 case HS_TIMED_OUT: /* No response */ 582 xs->error = XS_SELTIMEOUT; 583 break; 584 default: /* Other scsi protocol messes */ 585 printf("%s: host_stat %x\n", 586 sc->sc_dev.dv_xname, ecb->ecb_status.host_stat); 587 xs->error = XS_DRIVER_STUFFUP; 588 } 589 } else if (ecb->ecb_status.target_stat != SCSI_OK) { 590 switch (ecb->ecb_status.target_stat) { 591 case SCSI_CHECK: 592 s1 = &ecb->ecb_sense; 593 s2 = &xs->sense.scsi_sense; 594 *s2 = *s1; 595 xs->error = XS_SENSE; 596 break; 597 case SCSI_BUSY: 598 xs->error = XS_BUSY; 599 break; 600 default: 601 printf("%s: target_stat %x\n", 602 sc->sc_dev.dv_xname, ecb->ecb_status.target_stat); 603 xs->error = XS_DRIVER_STUFFUP; 604 } 605 } else 606 xs->resid = 0; 607 } 608 done: 609 ahb_free_ecb(sc, ecb); 610 scsipi_done(xs); 611 } 612 613 /* 614 * Start the board, ready for normal operation 615 */ 616 static int 617 ahb_find(bus_space_tag_t iot, bus_space_handle_t ioh, struct ahb_probe_data *sc) 618 { 619 u_char intdef; 620 int i, irq, busid; 621 int wait = 1000; /* 1 sec enough? */ 622 623 bus_space_write_1(iot, ioh, PORTADDR, PORTADDR_ENHANCED); 624 625 #define NO_NO 1 626 #ifdef NO_NO 627 /* 628 * reset board, If it doesn't respond, assume 629 * that it's not there.. good for the probe 630 */ 631 bus_space_write_1(iot, ioh, G2CNTRL, G2CNTRL_HARD_RESET); 632 delay(1000); 633 bus_space_write_1(iot, ioh, G2CNTRL, 0); 634 delay(10000); 635 while (--wait) { 636 if ((bus_space_read_1(iot, ioh, G2STAT) & G2STAT_BUSY) == 0) 637 break; 638 delay(1000); 639 } 640 if (!wait) { 641 #ifdef AHBDEBUG 642 printf("ahb_find: No answer from aha1742 board\n"); 643 #endif /* AHBDEBUG */ 644 return ENXIO; 645 } 646 i = bus_space_read_1(iot, ioh, MBOXIN0); 647 if (i) { 648 printf("self test failed, val = 0x%x\n", i); 649 return EIO; 650 } 651 652 /* Set it again, just to be sure. */ 653 bus_space_write_1(iot, ioh, PORTADDR, PORTADDR_ENHANCED); 654 #endif 655 656 while (bus_space_read_1(iot, ioh, G2STAT) & G2STAT_INT_PEND) { 657 printf("."); 658 bus_space_write_1(iot, ioh, G2CNTRL, G2CNTRL_CLEAR_EISA_INT); 659 delay(10000); 660 } 661 662 intdef = bus_space_read_1(iot, ioh, INTDEF); 663 switch (intdef & 0x07) { 664 case INT9: 665 irq = 9; 666 break; 667 case INT10: 668 irq = 10; 669 break; 670 case INT11: 671 irq = 11; 672 break; 673 case INT12: 674 irq = 12; 675 break; 676 case INT14: 677 irq = 14; 678 break; 679 case INT15: 680 irq = 15; 681 break; 682 default: 683 printf("illegal int setting %x\n", intdef); 684 return EIO; 685 } 686 687 bus_space_write_1(iot, ioh, INTDEF, (intdef | INTEN)); /* make sure we can interrupt */ 688 689 /* who are we on the scsi bus? */ 690 busid = (bus_space_read_1(iot, ioh, SCSIDEF) & HSCSIID); 691 692 /* if we want to return data, do so now */ 693 if (sc) { 694 sc->sc_irq = irq; 695 sc->sc_scsi_dev = busid; 696 } 697 698 /* 699 * Note that we are going and return (to probe) 700 */ 701 return 0; 702 } 703 704 static int 705 ahb_init(struct ahb_softc *sc) 706 { 707 bus_dma_segment_t seg; 708 int i, error, rseg; 709 710 #define ECBSIZE (AHB_ECB_MAX * sizeof(struct ahb_ecb)) 711 712 /* 713 * Allocate the ECBs. 714 */ 715 if ((error = bus_dmamem_alloc(sc->sc_dmat, ECBSIZE, 716 PAGE_SIZE, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) { 717 printf("%s: unable to allocate ecbs, error = %d\n", 718 sc->sc_dev.dv_xname, error); 719 return (error); 720 } 721 if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, 722 ECBSIZE, (caddr_t *)&sc->sc_ecbs, 723 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 724 printf("%s: unable to map ecbs, error = %d\n", 725 sc->sc_dev.dv_xname, error); 726 return (error); 727 } 728 729 /* 730 * Create and load the DMA map used for the ecbs. 731 */ 732 if ((error = bus_dmamap_create(sc->sc_dmat, ECBSIZE, 733 1, ECBSIZE, 0, BUS_DMA_NOWAIT, &sc->sc_dmamap_ecb)) != 0) { 734 printf("%s: unable to create ecb DMA map, error = %d\n", 735 sc->sc_dev.dv_xname, error); 736 return (error); 737 } 738 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_dmamap_ecb, 739 sc->sc_ecbs, ECBSIZE, NULL, BUS_DMA_NOWAIT)) != 0) { 740 printf("%s: unable to load ecb DMA map, error = %d\n", 741 sc->sc_dev.dv_xname, error); 742 return (error); 743 } 744 745 #undef ECBSIZE 746 747 /* 748 * Initialize the ecbs. 749 */ 750 i = ahb_create_ecbs(sc, sc->sc_ecbs, AHB_ECB_MAX); 751 if (i == 0) { 752 printf("%s: unable to create ecbs\n", 753 sc->sc_dev.dv_xname); 754 return (ENOMEM); 755 } else if (i != AHB_ECB_MAX) { 756 printf("%s: WARNING: only %d of %d ecbs created\n", 757 sc->sc_dev.dv_xname, i, AHB_ECB_MAX); 758 } 759 760 sc->sc_adapter.adapt_openings = i; 761 762 return (0); 763 } 764 765 static void 766 ahbminphys(struct buf *bp) 767 { 768 769 if (bp->b_bcount > AHB_MAXXFER) 770 bp->b_bcount = AHB_MAXXFER; 771 minphys(bp); 772 } 773 774 /* 775 * start a scsi operation given the command and the data address. Also needs 776 * the unit, target and lu. 777 */ 778 static void 779 ahb_scsipi_request(struct scsipi_channel *chan, scsipi_adapter_req_t req, 780 void *arg) 781 { 782 struct scsipi_xfer *xs; 783 struct scsipi_periph *periph; 784 struct ahb_softc *sc = (void *)chan->chan_adapter->adapt_dev; 785 bus_dma_tag_t dmat = sc->sc_dmat; 786 struct ahb_ecb *ecb; 787 int error, seg, flags, s; 788 789 switch (req) { 790 case ADAPTER_REQ_RUN_XFER: 791 xs = arg; 792 periph = xs->xs_periph; 793 flags = xs->xs_control; 794 795 SC_DEBUG(periph, SCSIPI_DB2, ("ahb_scsipi_request\n")); 796 797 /* Get an ECB to use. */ 798 ecb = ahb_get_ecb(sc); 799 #ifdef DIAGNOSTIC 800 /* 801 * This should never happen as we track the resources 802 * in the mid-layer. 803 */ 804 if (ecb == NULL) { 805 scsipi_printaddr(periph); 806 printf("unable to allocate ecb\n"); 807 panic("ahb_scsipi_request"); 808 } 809 #endif 810 811 ecb->xs = xs; 812 ecb->timeout = xs->timeout; 813 814 /* 815 * If it's a reset, we need to do an 'immediate' 816 * command, and store its ecb for later 817 * if there is already an immediate waiting, 818 * then WE must wait 819 */ 820 if (flags & XS_CTL_RESET) { 821 ecb->flags |= ECB_IMMED; 822 if (sc->sc_immed_ecb) { 823 ahb_free_ecb(sc, ecb); 824 xs->error = XS_BUSY; 825 scsipi_done(xs); 826 return; 827 } 828 sc->sc_immed_ecb = ecb; 829 830 s = splbio(); 831 ahb_send_immed(sc, AHB_TARG_RESET, ecb); 832 splx(s); 833 834 if ((flags & XS_CTL_POLL) == 0) 835 return; 836 837 /* 838 * If we can't use interrupts, poll on completion 839 */ 840 if (ahb_poll(sc, xs, ecb->timeout)) 841 ahb_timeout(ecb); 842 return; 843 } 844 845 /* 846 * Put all the arguments for the xfer in the ecb 847 */ 848 if (xs->cmdlen > sizeof(ecb->scsi_cmd)) { 849 printf("%s: cmdlen %d too large for ECB\n", 850 sc->sc_dev.dv_xname, xs->cmdlen); 851 xs->error = XS_DRIVER_STUFFUP; 852 goto out_bad; 853 } 854 ecb->opcode = ECB_SCSI_OP; 855 ecb->opt1 = ECB_SES /*| ECB_DSB*/ | ECB_ARS; 856 ecb->opt2 = periph->periph_lun | ECB_NRB; 857 bcopy(xs->cmd, &ecb->scsi_cmd, 858 ecb->scsi_cmd_length = xs->cmdlen); 859 ecb->sense_ptr = sc->sc_dmamap_ecb->dm_segs[0].ds_addr + 860 AHB_ECB_OFF(ecb) + offsetof(struct ahb_ecb, ecb_sense); 861 ecb->req_sense_length = sizeof(ecb->ecb_sense); 862 ecb->status = sc->sc_dmamap_ecb->dm_segs[0].ds_addr + 863 AHB_ECB_OFF(ecb) + offsetof(struct ahb_ecb, ecb_status); 864 ecb->ecb_status.host_stat = 0x00; 865 ecb->ecb_status.target_stat = 0x00; 866 867 if (xs->datalen) { 868 /* 869 * Map the DMA transfer. 870 */ 871 #ifdef TFS 872 if (flags & XS_CTL_DATA_UIO) { 873 error = bus_dmamap_load_uio(sc->sc_dmat, 874 ecb->dmamap_xfer, (struct uio *)xs->data, 875 BUS_DMA_NOWAIT); 876 } else 877 #endif /* TFS */ 878 { 879 error = bus_dmamap_load(sc->sc_dmat, 880 ecb->dmamap_xfer, xs->data, xs->datalen, 881 NULL, BUS_DMA_NOWAIT); 882 } 883 884 switch (error) { 885 case 0: 886 break; 887 888 case ENOMEM: 889 case EAGAIN: 890 xs->error = XS_RESOURCE_SHORTAGE; 891 goto out_bad; 892 893 default: 894 xs->error = XS_DRIVER_STUFFUP; 895 printf("%s: error %d loading DMA map\n", 896 sc->sc_dev.dv_xname, error); 897 out_bad: 898 ahb_free_ecb(sc, ecb); 899 scsipi_done(xs); 900 return; 901 } 902 903 bus_dmamap_sync(dmat, ecb->dmamap_xfer, 0, 904 ecb->dmamap_xfer->dm_mapsize, 905 (flags & XS_CTL_DATA_IN) ? BUS_DMASYNC_PREREAD : 906 BUS_DMASYNC_PREWRITE); 907 908 /* 909 * Load the hardware scatter/gather map with the 910 * contents of the DMA map. 911 */ 912 for (seg = 0; seg < ecb->dmamap_xfer->dm_nsegs; seg++) { 913 ecb->ahb_dma[seg].seg_addr = 914 ecb->dmamap_xfer->dm_segs[seg].ds_addr; 915 ecb->ahb_dma[seg].seg_len = 916 ecb->dmamap_xfer->dm_segs[seg].ds_len; 917 } 918 919 ecb->data_addr = sc->sc_dmamap_ecb->dm_segs[0].ds_addr + 920 AHB_ECB_OFF(ecb) + 921 offsetof(struct ahb_ecb, ahb_dma); 922 ecb->data_length = ecb->dmamap_xfer->dm_nsegs * 923 sizeof(struct ahb_dma_seg); 924 ecb->opt1 |= ECB_S_G; 925 } else { /* No data xfer, use non S/G values */ 926 ecb->data_addr = (physaddr)0; 927 ecb->data_length = 0; 928 } 929 ecb->link_addr = (physaddr)0; 930 931 bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap_ecb, 932 AHB_ECB_OFF(ecb), sizeof(struct ahb_ecb), 933 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 934 935 s = splbio(); 936 ahb_send_mbox(sc, OP_START_ECB, ecb); 937 splx(s); 938 939 if ((flags & XS_CTL_POLL) == 0) 940 return; 941 942 /* 943 * If we can't use interrupts, poll on completion 944 */ 945 if (ahb_poll(sc, xs, ecb->timeout)) { 946 ahb_timeout(ecb); 947 if (ahb_poll(sc, xs, ecb->timeout)) 948 ahb_timeout(ecb); 949 } 950 return; 951 952 case ADAPTER_REQ_GROW_RESOURCES: 953 /* XXX Not supported. */ 954 return; 955 956 case ADAPTER_REQ_SET_XFER_MODE: 957 /* XXX How do we do this? */ 958 return; 959 } 960 } 961 962 /* 963 * Function to poll for command completion when in poll mode 964 */ 965 static int 966 ahb_poll(struct ahb_softc *sc, struct scsipi_xfer *xs, int count) 967 { /* in msec */ 968 bus_space_tag_t iot = sc->sc_iot; 969 bus_space_handle_t ioh = sc->sc_ioh; 970 971 while (count) { 972 /* 973 * If we had interrupts enabled, would we 974 * have got an interrupt? 975 */ 976 if (bus_space_read_1(iot, ioh, G2STAT) & G2STAT_INT_PEND) 977 ahbintr(sc); 978 if (xs->xs_status & XS_STS_DONE) 979 return 0; 980 delay(1000); 981 count--; 982 } 983 return 1; 984 } 985 986 static void 987 ahb_timeout(void *arg) 988 { 989 struct ahb_ecb *ecb = arg; 990 struct scsipi_xfer *xs = ecb->xs; 991 struct scsipi_periph *periph = xs->xs_periph; 992 struct ahb_softc *sc = 993 (void *)periph->periph_channel->chan_adapter->adapt_dev; 994 int s; 995 996 scsipi_printaddr(periph); 997 printf("timed out"); 998 999 s = splbio(); 1000 1001 if (ecb->flags & ECB_IMMED) { 1002 printf("\n"); 1003 ecb->flags |= ECB_IMMED_FAIL; 1004 /* XXX Must reset! */ 1005 } else 1006 1007 /* 1008 * If it has been through before, then 1009 * a previous abort has failed, don't 1010 * try abort again 1011 */ 1012 if (ecb->flags & ECB_ABORT) { 1013 /* abort timed out */ 1014 printf(" AGAIN\n"); 1015 /* XXX Must reset! */ 1016 } else { 1017 /* abort the operation that has timed out */ 1018 printf("\n"); 1019 ecb->xs->error = XS_TIMEOUT; 1020 ecb->timeout = AHB_ABORT_TIMEOUT; 1021 ecb->flags |= ECB_ABORT; 1022 ahb_send_mbox(sc, OP_ABORT_ECB, ecb); 1023 } 1024 1025 splx(s); 1026 } 1027
Indexes created Mon Sep 29 21:09:56 GMT 2025