ahb.c revision 1.2
1 /* $NetBSD: ahb.c,v 1.2 1996/09/07 04:59:06 mycroft Exp $ */ 2 3 #undef AHBDEBUG 4 #ifdef DDB 5 #define integrate 6 #else 7 #define integrate static inline 8 #endif 9 10 /* 11 * Copyright (c) 1994, 1996 Charles M. Hannum. All rights reserved. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by Charles M. Hannum. 24 * 4. The name of the author may not be used to endorse or promote products 25 * derived from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 28 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 29 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 30 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 31 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 32 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 33 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 34 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 35 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 36 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Originally written by Julian Elischer (julian (at) tfs.com) 41 * for TRW Financial Systems for use under the MACH(2.5) operating system. 42 * 43 * TRW Financial Systems, in accordance with their agreement with Carnegie 44 * Mellon University, makes this software available to CMU to distribute 45 * or use in any manner that they see fit as long as this message is kept with 46 * the software. For this reason TFS also grants any other persons or 47 * organisations permission to use or modify this software. 48 * 49 * TFS supplies this software to be publicly redistributed 50 * on the understanding that TFS is not responsible for the correct 51 * functioning of this software in any circumstances. 52 */ 53 54 #include <sys/types.h> 55 #include <sys/param.h> 56 #include <sys/systm.h> 57 #include <sys/kernel.h> 58 #include <sys/errno.h> 59 #include <sys/ioctl.h> 60 #include <sys/device.h> 61 #include <sys/malloc.h> 62 #include <sys/buf.h> 63 #include <sys/proc.h> 64 #include <sys/user.h> 65 66 #include <machine/bus.h> 67 #include <machine/intr.h> 68 69 #include <scsi/scsi_all.h> 70 #include <scsi/scsiconf.h> 71 72 #include <dev/eisa/eisareg.h> 73 #include <dev/eisa/eisavar.h> 74 #include <dev/eisa/eisadevs.h> 75 #include <dev/eisa/ahbreg.h> 76 77 #ifndef DDB 78 #define Debugger() panic("should call debugger here (aha1742.c)") 79 #endif /* ! DDB */ 80 81 #define AHB_ECB_MAX 32 /* store up to 32 ECBs at one time */ 82 #define ECB_HASH_SIZE 32 /* hash table size for phystokv */ 83 #define ECB_HASH_SHIFT 9 84 #define ECB_HASH(x) ((((long)(x))>>ECB_HASH_SHIFT) & (ECB_HASH_SIZE - 1)) 85 86 #define KVTOPHYS(x) vtophys(x) 87 88 struct ahb_softc { 89 struct device sc_dev; 90 bus_chipset_tag_t sc_bc; 91 92 bus_io_handle_t sc_ioh; 93 int sc_irq; 94 void *sc_ih; 95 96 struct ahb_ecb *sc_ecbhash[ECB_HASH_SIZE]; 97 TAILQ_HEAD(, ahb_ecb) sc_free_ecb; 98 struct ahb_ecb *sc_immed_ecb; /* an outstanding immediete command */ 99 int sc_numecbs; 100 int sc_scsi_dev; /* our scsi id */ 101 struct scsi_link sc_link; 102 }; 103 104 void ahb_send_mbox __P((struct ahb_softc *, int, struct ahb_ecb *)); 105 void ahb_send_immed __P((struct ahb_softc *, u_long, struct ahb_ecb *)); 106 int ahbintr __P((void *)); 107 void ahb_reset_ecb __P((struct ahb_softc *, struct ahb_ecb *)); 108 void ahb_free_ecb __P((struct ahb_softc *, struct ahb_ecb *)); 109 void ahb_init_ecb __P((struct ahb_softc *, struct ahb_ecb *)); 110 struct ahb_ecb *ahb_get_ecb __P((struct ahb_softc *, int)); 111 struct ahb_ecb *ahb_ecb_phys_kv __P((struct ahb_softc *, physaddr)); 112 void ahb_done __P((struct ahb_softc *, struct ahb_ecb *)); 113 int ahb_find __P((bus_chipset_tag_t, bus_io_handle_t, struct ahb_softc *)); 114 void ahb_init __P((struct ahb_softc *)); 115 void ahbminphys __P((struct buf *)); 116 int ahb_scsi_cmd __P((struct scsi_xfer *)); 117 int ahb_poll __P((struct ahb_softc *, struct scsi_xfer *, int)); 118 void ahb_timeout __P((void *)); 119 120 struct scsi_adapter ahb_switch = { 121 ahb_scsi_cmd, 122 ahbminphys, 123 0, 124 0, 125 }; 126 127 /* the below structure is so we have a default dev struct for our link struct */ 128 struct scsi_device ahb_dev = { 129 NULL, /* Use default error handler */ 130 NULL, /* have a queue, served by this */ 131 NULL, /* have no async handler */ 132 NULL, /* Use default 'done' routine */ 133 }; 134 135 int ahbmatch __P((struct device *, void *, void *)); 136 void ahbattach __P((struct device *, struct device *, void *)); 137 138 struct cfattach ahb_ca = { 139 sizeof(struct ahb_softc), ahbmatch, ahbattach 140 }; 141 142 struct cfdriver ahb_cd = { 143 NULL, "ahb", DV_DULL 144 }; 145 146 #define AHB_ABORT_TIMEOUT 2000 /* time to wait for abort (mSec) */ 147 148 /* 149 * Check the slots looking for a board we recognise 150 * If we find one, note it's address (slot) and call 151 * the actual probe routine to check it out. 152 */ 153 int 154 ahbmatch(parent, match, aux) 155 struct device *parent; 156 void *match, *aux; 157 { 158 struct eisa_attach_args *ea = aux; 159 bus_chipset_tag_t bc = ea->ea_bc; 160 bus_io_handle_t ioh; 161 int rv; 162 163 /* must match one of our known ID strings */ 164 if (strcmp(ea->ea_idstring, "ADP0000") && 165 strcmp(ea->ea_idstring, "ADP0001") && 166 strcmp(ea->ea_idstring, "ADP0002") && 167 strcmp(ea->ea_idstring, "ADP0400")) 168 return (0); 169 170 if (bus_io_map(bc, EISA_SLOT_ADDR(ea->ea_slot), EISA_SLOT_SIZE, &ioh)) 171 return (0); 172 173 rv = !ahb_find(bc, ioh, NULL); 174 175 bus_io_unmap(bc, ioh, EISA_SLOT_SIZE); 176 177 return (rv); 178 } 179 180 /* 181 * Attach all the sub-devices we can find 182 */ 183 void 184 ahbattach(parent, self, aux) 185 struct device *parent, *self; 186 void *aux; 187 { 188 struct eisa_attach_args *ea = aux; 189 struct ahb_softc *sc = (void *)self; 190 bus_chipset_tag_t bc = ea->ea_bc; 191 bus_io_handle_t ioh; 192 eisa_chipset_tag_t ec = ea->ea_ec; 193 eisa_intr_handle_t ih; 194 const char *model, *intrstr; 195 196 if (!strcmp(ea->ea_idstring, "ADP0000")) 197 model = EISA_PRODUCT_ADP0000; 198 else if (!strcmp(ea->ea_idstring, "ADP0001")) 199 model = EISA_PRODUCT_ADP0001; 200 else if (!strcmp(ea->ea_idstring, "ADP0002")) 201 model = EISA_PRODUCT_ADP0002; 202 else if (!strcmp(ea->ea_idstring, "ADP0400")) 203 model = EISA_PRODUCT_ADP0400; 204 else 205 model = "unknown model!"; 206 printf(": %s\n", model); 207 208 if (bus_io_map(bc, EISA_SLOT_ADDR(ea->ea_slot), EISA_SLOT_SIZE, &ioh)) 209 panic("ahbattach: could not map I/O addresses"); 210 211 sc->sc_bc = bc; 212 sc->sc_ioh = ioh; 213 if (ahb_find(bc, ioh, sc)) 214 panic("ahbattach: ahb_find failed!"); 215 216 ahb_init(sc); 217 TAILQ_INIT(&sc->sc_free_ecb); 218 219 /* 220 * fill in the prototype scsi_link. 221 */ 222 sc->sc_link.channel = SCSI_CHANNEL_ONLY_ONE; 223 sc->sc_link.adapter_softc = sc; 224 sc->sc_link.adapter_target = sc->sc_scsi_dev; 225 sc->sc_link.adapter = &ahb_switch; 226 sc->sc_link.device = &ahb_dev; 227 sc->sc_link.openings = 4; 228 229 if (eisa_intr_map(ec, sc->sc_irq, &ih)) { 230 printf("%s: couldn't map interrupt (%d)\n", 231 sc->sc_dev.dv_xname, sc->sc_irq); 232 return; 233 } 234 intrstr = eisa_intr_string(ec, ih); 235 sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO, 236 ahbintr, sc); 237 if (sc->sc_ih == NULL) { 238 printf("%s: couldn't establish interrupt", 239 sc->sc_dev.dv_xname); 240 if (intrstr != NULL) 241 printf(" at %s", intrstr); 242 printf("\n"); 243 return; 244 } 245 if (intrstr != NULL) 246 printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, 247 intrstr); 248 249 /* 250 * ask the adapter what subunits are present 251 */ 252 config_found(self, &sc->sc_link, scsiprint); 253 } 254 255 /* 256 * Function to send a command out through a mailbox 257 */ 258 void 259 ahb_send_mbox(sc, opcode, ecb) 260 struct ahb_softc *sc; 261 int opcode; 262 struct ahb_ecb *ecb; 263 { 264 bus_chipset_tag_t bc = sc->sc_bc; 265 bus_io_handle_t ioh = sc->sc_ioh; 266 int wait = 300; /* 1ms should be enough */ 267 268 while (--wait) { 269 if ((bus_io_read_1(bc, ioh, G2STAT) & (G2STAT_BUSY | G2STAT_MBOX_EMPTY)) 270 == (G2STAT_MBOX_EMPTY)) 271 break; 272 delay(10); 273 } 274 if (!wait) { 275 printf("%s: board not responding\n", sc->sc_dev.dv_xname); 276 Debugger(); 277 } 278 279 bus_io_write_4(bc, ioh, MBOXOUT0, KVTOPHYS(ecb)); /* don't know this will work */ 280 bus_io_write_1(bc, ioh, ATTN, opcode | ecb->xs->sc_link->target); 281 282 if ((ecb->xs->flags & SCSI_POLL) == 0) 283 timeout(ahb_timeout, ecb, (ecb->timeout * hz) / 1000); 284 } 285 286 /* 287 * Function to send an immediate type command to the adapter 288 */ 289 void 290 ahb_send_immed(sc, cmd, ecb) 291 struct ahb_softc *sc; 292 u_long cmd; 293 struct ahb_ecb *ecb; 294 { 295 bus_chipset_tag_t bc = sc->sc_bc; 296 bus_io_handle_t ioh = sc->sc_ioh; 297 int wait = 100; /* 1 ms enough? */ 298 299 while (--wait) { 300 if ((bus_io_read_1(bc, ioh, G2STAT) & (G2STAT_BUSY | G2STAT_MBOX_EMPTY)) 301 == (G2STAT_MBOX_EMPTY)) 302 break; 303 delay(10); 304 } 305 if (!wait) { 306 printf("%s: board not responding\n", sc->sc_dev.dv_xname); 307 Debugger(); 308 } 309 310 bus_io_write_4(bc, ioh, MBOXOUT0, cmd); /* don't know this will work */ 311 bus_io_write_1(bc, ioh, G2CNTRL, G2CNTRL_SET_HOST_READY); 312 bus_io_write_1(bc, ioh, ATTN, OP_IMMED | ecb->xs->sc_link->target); 313 314 if ((ecb->xs->flags & SCSI_POLL) == 0) 315 timeout(ahb_timeout, ecb, (ecb->timeout * hz) / 1000); 316 } 317 318 /* 319 * Catch an interrupt from the adaptor 320 */ 321 int 322 ahbintr(arg) 323 void *arg; 324 { 325 struct ahb_softc *sc = arg; 326 bus_chipset_tag_t bc = sc->sc_bc; 327 bus_io_handle_t ioh = sc->sc_ioh; 328 struct ahb_ecb *ecb; 329 u_char ahbstat; 330 u_long mboxval; 331 332 #ifdef AHBDEBUG 333 printf("%s: ahbintr ", sc->sc_dev.dv_xname); 334 #endif /* AHBDEBUG */ 335 336 if ((bus_io_read_1(bc, ioh, G2STAT) & G2STAT_INT_PEND) == 0) 337 return 0; 338 339 for (;;) { 340 /* 341 * First get all the information and then 342 * acknowlege the interrupt 343 */ 344 ahbstat = bus_io_read_1(bc, ioh, G2INTST); 345 mboxval = bus_io_read_4(bc, ioh, MBOXIN0); 346 bus_io_write_1(bc, ioh, G2CNTRL, G2CNTRL_CLEAR_EISA_INT); 347 348 #ifdef AHBDEBUG 349 printf("status = 0x%x ", ahbstat); 350 #endif /* AHBDEBUG */ 351 352 /* 353 * Process the completed operation 354 */ 355 switch (ahbstat & G2INTST_INT_STAT) { 356 case AHB_ECB_OK: 357 case AHB_ECB_RECOVERED: 358 case AHB_ECB_ERR: 359 ecb = ahb_ecb_phys_kv(sc, mboxval); 360 if (!ecb) { 361 printf("%s: BAD ECB RETURNED!\n", 362 sc->sc_dev.dv_xname); 363 goto next; /* whatever it was, it'll timeout */ 364 } 365 break; 366 367 case AHB_IMMED_ERR: 368 ecb = sc->sc_immed_ecb; 369 sc->sc_immed_ecb = 0; 370 ecb->flags |= ECB_IMMED_FAIL; 371 break; 372 373 case AHB_IMMED_OK: 374 ecb = sc->sc_immed_ecb; 375 sc->sc_immed_ecb = 0; 376 break; 377 378 default: 379 printf("%s: unexpected interrupt %x\n", 380 sc->sc_dev.dv_xname, ahbstat); 381 goto next; 382 } 383 384 untimeout(ahb_timeout, ecb); 385 ahb_done(sc, ecb); 386 387 next: 388 if ((bus_io_read_1(bc, ioh, G2STAT) & G2STAT_INT_PEND) == 0) 389 return 1; 390 } 391 } 392 393 integrate void 394 ahb_reset_ecb(sc, ecb) 395 struct ahb_softc *sc; 396 struct ahb_ecb *ecb; 397 { 398 399 ecb->flags = 0; 400 } 401 402 /* 403 * A ecb (and hence a mbx-out is put onto the 404 * free list. 405 */ 406 void 407 ahb_free_ecb(sc, ecb) 408 struct ahb_softc *sc; 409 struct ahb_ecb *ecb; 410 { 411 int s; 412 413 s = splbio(); 414 415 ahb_reset_ecb(sc, ecb); 416 TAILQ_INSERT_HEAD(&sc->sc_free_ecb, ecb, chain); 417 418 /* 419 * If there were none, wake anybody waiting for one to come free, 420 * starting with queued entries. 421 */ 422 if (ecb->chain.tqe_next == 0) 423 wakeup(&sc->sc_free_ecb); 424 425 splx(s); 426 } 427 428 integrate void 429 ahb_init_ecb(sc, ecb) 430 struct ahb_softc *sc; 431 struct ahb_ecb *ecb; 432 { 433 int hashnum; 434 435 bzero(ecb, sizeof(struct ahb_ecb)); 436 /* 437 * put in the phystokv hash table 438 * Never gets taken out. 439 */ 440 ecb->hashkey = KVTOPHYS(ecb); 441 hashnum = ECB_HASH(ecb->hashkey); 442 ecb->nexthash = sc->sc_ecbhash[hashnum]; 443 sc->sc_ecbhash[hashnum] = ecb; 444 ahb_reset_ecb(sc, ecb); 445 } 446 447 /* 448 * Get a free ecb 449 * 450 * If there are none, see if we can allocate a new one. If so, put it in the 451 * hash table too otherwise either return an error or sleep. 452 */ 453 struct ahb_ecb * 454 ahb_get_ecb(sc, flags) 455 struct ahb_softc *sc; 456 int flags; 457 { 458 struct ahb_ecb *ecb; 459 int s; 460 461 s = splbio(); 462 463 /* 464 * If we can and have to, sleep waiting for one to come free 465 * but only if we can't allocate a new one. 466 */ 467 for (;;) { 468 ecb = sc->sc_free_ecb.tqh_first; 469 if (ecb) { 470 TAILQ_REMOVE(&sc->sc_free_ecb, ecb, chain); 471 break; 472 } 473 if (sc->sc_numecbs < AHB_ECB_MAX) { 474 ecb = (struct ahb_ecb *) malloc(sizeof(struct ahb_ecb), 475 M_TEMP, M_NOWAIT); 476 if (!ecb) { 477 printf("%s: can't malloc ecb\n", 478 sc->sc_dev.dv_xname); 479 goto out; 480 } 481 ahb_init_ecb(sc, ecb); 482 sc->sc_numecbs++; 483 break; 484 } 485 if ((flags & SCSI_NOSLEEP) != 0) 486 goto out; 487 tsleep(&sc->sc_free_ecb, PRIBIO, "ahbecb", 0); 488 } 489 490 ecb->flags |= ECB_ALLOC; 491 492 out: 493 splx(s); 494 return ecb; 495 } 496 497 /* 498 * given a physical address, find the ecb that it corresponds to. 499 */ 500 struct ahb_ecb * 501 ahb_ecb_phys_kv(sc, ecb_phys) 502 struct ahb_softc *sc; 503 physaddr ecb_phys; 504 { 505 int hashnum = ECB_HASH(ecb_phys); 506 struct ahb_ecb *ecb = sc->sc_ecbhash[hashnum]; 507 508 while (ecb) { 509 if (ecb->hashkey == ecb_phys) 510 break; 511 ecb = ecb->nexthash; 512 } 513 return ecb; 514 } 515 516 /* 517 * We have a ecb which has been processed by the adaptor, now we look to see 518 * how the operation went. 519 */ 520 void 521 ahb_done(sc, ecb) 522 struct ahb_softc *sc; 523 struct ahb_ecb *ecb; 524 { 525 struct scsi_sense_data *s1, *s2; 526 struct scsi_xfer *xs = ecb->xs; 527 528 SC_DEBUG(xs->sc_link, SDEV_DB2, ("ahb_done\n")); 529 /* 530 * Otherwise, put the results of the operation 531 * into the xfer and call whoever started it 532 */ 533 if ((ecb->flags & ECB_ALLOC) == 0) { 534 printf("%s: exiting ecb not allocated!\n", sc->sc_dev.dv_xname); 535 Debugger(); 536 } 537 if (ecb->flags & ECB_IMMED) { 538 if (ecb->flags & ECB_IMMED_FAIL) 539 xs->error = XS_DRIVER_STUFFUP; 540 goto done; 541 } 542 if (xs->error == XS_NOERROR) { 543 if (ecb->ecb_status.host_stat != HS_OK) { 544 switch (ecb->ecb_status.host_stat) { 545 case HS_TIMED_OUT: /* No response */ 546 xs->error = XS_SELTIMEOUT; 547 break; 548 default: /* Other scsi protocol messes */ 549 printf("%s: host_stat %x\n", 550 sc->sc_dev.dv_xname, ecb->ecb_status.host_stat); 551 xs->error = XS_DRIVER_STUFFUP; 552 } 553 } else if (ecb->ecb_status.target_stat != SCSI_OK) { 554 switch (ecb->ecb_status.target_stat) { 555 case SCSI_CHECK: 556 s1 = &ecb->ecb_sense; 557 s2 = &xs->sense; 558 *s2 = *s1; 559 xs->error = XS_SENSE; 560 break; 561 case SCSI_BUSY: 562 xs->error = XS_BUSY; 563 break; 564 default: 565 printf("%s: target_stat %x\n", 566 sc->sc_dev.dv_xname, ecb->ecb_status.target_stat); 567 xs->error = XS_DRIVER_STUFFUP; 568 } 569 } else 570 xs->resid = 0; 571 } 572 done: 573 ahb_free_ecb(sc, ecb); 574 xs->flags |= ITSDONE; 575 scsi_done(xs); 576 } 577 578 /* 579 * Start the board, ready for normal operation 580 */ 581 int 582 ahb_find(bc, ioh, sc) 583 bus_chipset_tag_t bc; 584 bus_io_handle_t ioh; 585 struct ahb_softc *sc; 586 { 587 u_char intdef; 588 int i, irq, busid; 589 int wait = 1000; /* 1 sec enough? */ 590 591 bus_io_write_1(bc, ioh, PORTADDR, PORTADDR_ENHANCED); 592 593 #define NO_NO 1 594 #ifdef NO_NO 595 /* 596 * reset board, If it doesn't respond, assume 597 * that it's not there.. good for the probe 598 */ 599 bus_io_write_1(bc, ioh, G2CNTRL, G2CNTRL_HARD_RESET); 600 delay(1000); 601 bus_io_write_1(bc, ioh, G2CNTRL, 0); 602 delay(10000); 603 while (--wait) { 604 if ((bus_io_read_1(bc, ioh, G2STAT) & G2STAT_BUSY) == 0) 605 break; 606 delay(1000); 607 } 608 if (!wait) { 609 #ifdef AHBDEBUG 610 printf("ahb_find: No answer from aha1742 board\n"); 611 #endif /* AHBDEBUG */ 612 return ENXIO; 613 } 614 i = bus_io_read_1(bc, ioh, MBOXIN0); 615 if (i) { 616 printf("self test failed, val = 0x%x\n", i); 617 return EIO; 618 } 619 620 /* Set it again, just to be sure. */ 621 bus_io_write_1(bc, ioh, PORTADDR, PORTADDR_ENHANCED); 622 #endif 623 624 while (bus_io_read_1(bc, ioh, G2STAT) & G2STAT_INT_PEND) { 625 printf("."); 626 bus_io_write_1(bc, ioh, G2CNTRL, G2CNTRL_CLEAR_EISA_INT); 627 delay(10000); 628 } 629 630 intdef = bus_io_read_1(bc, ioh, INTDEF); 631 switch (intdef & 0x07) { 632 case INT9: 633 irq = 9; 634 break; 635 case INT10: 636 irq = 10; 637 break; 638 case INT11: 639 irq = 11; 640 break; 641 case INT12: 642 irq = 12; 643 break; 644 case INT14: 645 irq = 14; 646 break; 647 case INT15: 648 irq = 15; 649 break; 650 default: 651 printf("illegal int setting %x\n", intdef); 652 return EIO; 653 } 654 655 bus_io_write_1(bc, ioh, INTDEF, (intdef | INTEN)); /* make sure we can interrupt */ 656 657 /* who are we on the scsi bus? */ 658 busid = (bus_io_read_1(bc, ioh, SCSIDEF) & HSCSIID); 659 660 /* if we want to fill in softc, do so now */ 661 if (sc != NULL) { 662 sc->sc_irq = irq; 663 sc->sc_scsi_dev = busid; 664 } 665 666 /* 667 * Note that we are going and return (to probe) 668 */ 669 return 0; 670 } 671 672 void 673 ahb_init(sc) 674 struct ahb_softc *sc; 675 { 676 677 } 678 679 void 680 ahbminphys(bp) 681 struct buf *bp; 682 { 683 684 if (bp->b_bcount > ((AHB_NSEG - 1) << PGSHIFT)) 685 bp->b_bcount = ((AHB_NSEG - 1) << PGSHIFT); 686 minphys(bp); 687 } 688 689 /* 690 * start a scsi operation given the command and the data address. Also needs 691 * the unit, target and lu. 692 */ 693 int 694 ahb_scsi_cmd(xs) 695 struct scsi_xfer *xs; 696 { 697 struct scsi_link *sc_link = xs->sc_link; 698 struct ahb_softc *sc = sc_link->adapter_softc; 699 struct ahb_ecb *ecb; 700 struct ahb_dma_seg *sg; 701 int seg; /* scatter gather seg being worked on */ 702 u_long thiskv, thisphys, nextphys; 703 int bytes_this_seg, bytes_this_page, datalen, flags; 704 struct iovec *iovp; 705 int s; 706 707 SC_DEBUG(sc_link, SDEV_DB2, ("ahb_scsi_cmd\n")); 708 /* 709 * get a ecb (mbox-out) to use. If the transfer 710 * is from a buf (possibly from interrupt time) 711 * then we can't allow it to sleep 712 */ 713 flags = xs->flags; 714 if ((ecb = ahb_get_ecb(sc, flags)) == NULL) { 715 xs->error = XS_DRIVER_STUFFUP; 716 return TRY_AGAIN_LATER; 717 } 718 ecb->xs = xs; 719 ecb->timeout = xs->timeout; 720 721 /* 722 * If it's a reset, we need to do an 'immediate' 723 * command, and store its ecb for later 724 * if there is already an immediate waiting, 725 * then WE must wait 726 */ 727 if (flags & SCSI_RESET) { 728 ecb->flags |= ECB_IMMED; 729 if (sc->sc_immed_ecb) 730 return TRY_AGAIN_LATER; 731 sc->sc_immed_ecb = ecb; 732 733 s = splbio(); 734 ahb_send_immed(sc, AHB_TARG_RESET, ecb); 735 splx(s); 736 737 if ((flags & SCSI_POLL) == 0) 738 return SUCCESSFULLY_QUEUED; 739 740 /* 741 * If we can't use interrupts, poll on completion 742 */ 743 if (ahb_poll(sc, xs, ecb->timeout)) 744 ahb_timeout(ecb); 745 return COMPLETE; 746 } 747 748 /* 749 * Put all the arguments for the xfer in the ecb 750 */ 751 ecb->opcode = ECB_SCSI_OP; 752 ecb->opt1 = ECB_SES /*| ECB_DSB*/ | ECB_ARS; 753 ecb->opt2 = sc_link->lun | ECB_NRB; 754 bcopy(xs->cmd, &ecb->scsi_cmd, ecb->scsi_cmd_length = xs->cmdlen); 755 ecb->sense_ptr = KVTOPHYS(&ecb->ecb_sense); 756 ecb->req_sense_length = sizeof(ecb->ecb_sense); 757 ecb->status = KVTOPHYS(&ecb->ecb_status); 758 ecb->ecb_status.host_stat = 0x00; 759 ecb->ecb_status.target_stat = 0x00; 760 761 if (xs->datalen) { 762 sg = ecb->ahb_dma; 763 seg = 0; 764 #ifdef TFS 765 if (flags & SCSI_DATA_UIO) { 766 iovp = ((struct uio *) xs->data)->uio_iov; 767 datalen = ((struct uio *) xs->data)->uio_iovcnt; 768 xs->datalen = 0; 769 while (datalen && seg < AHB_NSEG) { 770 sg->seg_addr = (physaddr)iovp->iov_base; 771 sg->seg_len = iovp->iov_len; 772 xs->datalen += iovp->iov_len; 773 SC_DEBUGN(sc_link, SDEV_DB4, ("(0x%x@0x%x)", 774 iovp->iov_len, iovp->iov_base)); 775 sg++; 776 iovp++; 777 seg++; 778 datalen--; 779 } 780 } 781 else 782 #endif /*TFS */ 783 { 784 /* 785 * Set up the scatter gather block 786 */ 787 SC_DEBUG(sc_link, SDEV_DB4, 788 ("%d @0x%x:- ", xs->datalen, xs->data)); 789 datalen = xs->datalen; 790 thiskv = (long) xs->data; 791 thisphys = KVTOPHYS(thiskv); 792 793 while (datalen && seg < AHB_NSEG) { 794 bytes_this_seg = 0; 795 796 /* put in the base address */ 797 sg->seg_addr = thisphys; 798 799 SC_DEBUGN(sc_link, SDEV_DB4, ("0x%x", thisphys)); 800 801 /* do it at least once */ 802 nextphys = thisphys; 803 while (datalen && thisphys == nextphys) { 804 /* 805 * This page is contiguous (physically) 806 * with the the last, just extend the 807 * length 808 */ 809 /* how far to the end of the page */ 810 nextphys = (thisphys & ~PGOFSET) + NBPG; 811 bytes_this_page = nextphys - thisphys; 812 /**** or the data ****/ 813 bytes_this_page = min(bytes_this_page, 814 datalen); 815 bytes_this_seg += bytes_this_page; 816 datalen -= bytes_this_page; 817 818 /* get more ready for the next page */ 819 thiskv = (thiskv & ~PGOFSET) + NBPG; 820 if (datalen) 821 thisphys = KVTOPHYS(thiskv); 822 } 823 /* 824 * next page isn't contiguous, finish the seg 825 */ 826 SC_DEBUGN(sc_link, SDEV_DB4, 827 ("(0x%x)", bytes_this_seg)); 828 sg->seg_len = bytes_this_seg; 829 sg++; 830 seg++; 831 } 832 } 833 /*end of iov/kv decision */ 834 SC_DEBUGN(sc_link, SDEV_DB4, ("\n")); 835 if (datalen) { 836 /* 837 * there's still data, must have run out of segs! 838 */ 839 printf("%s: ahb_scsi_cmd, more than %d dma segs\n", 840 sc->sc_dev.dv_xname, AHB_NSEG); 841 goto bad; 842 } 843 ecb->data_addr = KVTOPHYS(ecb->ahb_dma); 844 ecb->data_length = seg * sizeof(struct ahb_dma_seg); 845 ecb->opt1 |= ECB_S_G; 846 } else { /* No data xfer, use non S/G values */ 847 ecb->data_addr = (physaddr)0; 848 ecb->data_length = 0; 849 } 850 ecb->link_addr = (physaddr)0; 851 852 s = splbio(); 853 ahb_send_mbox(sc, OP_START_ECB, ecb); 854 splx(s); 855 856 /* 857 * Usually return SUCCESSFULLY QUEUED 858 */ 859 if ((flags & SCSI_POLL) == 0) 860 return SUCCESSFULLY_QUEUED; 861 862 /* 863 * If we can't use interrupts, poll on completion 864 */ 865 if (ahb_poll(sc, xs, ecb->timeout)) { 866 ahb_timeout(ecb); 867 if (ahb_poll(sc, xs, ecb->timeout)) 868 ahb_timeout(ecb); 869 } 870 return COMPLETE; 871 872 bad: 873 xs->error = XS_DRIVER_STUFFUP; 874 ahb_free_ecb(sc, ecb); 875 return COMPLETE; 876 } 877 878 /* 879 * Function to poll for command completion when in poll mode 880 */ 881 int 882 ahb_poll(sc, xs, count) 883 struct ahb_softc *sc; 884 struct scsi_xfer *xs; 885 int count; 886 { /* in msec */ 887 bus_chipset_tag_t bc = sc->sc_bc; 888 bus_io_handle_t ioh = sc->sc_ioh; 889 890 while (count) { 891 /* 892 * If we had interrupts enabled, would we 893 * have got an interrupt? 894 */ 895 if (bus_io_read_1(bc, ioh, G2STAT) & G2STAT_INT_PEND) 896 ahbintr(sc); 897 if (xs->flags & ITSDONE) 898 return 0; 899 delay(1000); 900 count--; 901 } 902 return 1; 903 } 904 905 void 906 ahb_timeout(arg) 907 void *arg; 908 { 909 struct ahb_ecb *ecb = arg; 910 struct scsi_xfer *xs = ecb->xs; 911 struct scsi_link *sc_link = xs->sc_link; 912 struct ahb_softc *sc = sc_link->adapter_softc; 913 int s; 914 915 sc_print_addr(sc_link); 916 printf("timed out"); 917 918 s = splbio(); 919 920 if (ecb->flags & ECB_IMMED) { 921 printf("\n"); 922 ecb->flags |= ECB_IMMED_FAIL; 923 /* XXX Must reset! */ 924 } else 925 926 /* 927 * If it has been through before, then 928 * a previous abort has failed, don't 929 * try abort again 930 */ 931 if (ecb->flags & ECB_ABORT) { 932 /* abort timed out */ 933 printf(" AGAIN\n"); 934 /* XXX Must reset! */ 935 } else { 936 /* abort the operation that has timed out */ 937 printf("\n"); 938 ecb->xs->error = XS_TIMEOUT; 939 ecb->timeout = AHB_ABORT_TIMEOUT; 940 ecb->flags |= ECB_ABORT; 941 ahb_send_mbox(sc, OP_ABORT_ECB, ecb); 942 } 943 944 splx(s); 945 } 946
Indexes created Mon Sep 29 21:09:56 GMT 2025