aic7xxx.c revision 1.23
1 /* $NetBSD: aic7xxx.c,v 1.23 1997/04/10 02:48:38 cgd Exp $ */ 2 3 /* 4 * Generic driver for the aic7xxx based adaptec SCSI controllers 5 * Product specific probe and attach routines can be found in: 6 * i386/eisa/aic7770.c 27/284X and aic7770 motherboard controllers 7 * pci/aic7870.c 3940, 2940, aic7880, aic7870 and aic7850 controllers 8 * 9 * Copyright (c) 1994, 1995, 1996 Justin T. Gibbs. 10 * All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice immediately at the beginning of the file, without modification, 17 * 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. The name of the author may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 28 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from Id: aic7xxx.c,v 1.75 1996/06/23 20:02:37 gibbs Exp 37 */ 38 /* 39 * TODO: 40 * Implement Target Mode 41 * 42 * A few notes on how SCB paging works... 43 * 44 * SCB paging takes advantage of the fact that devices stay disconnected 45 * from the bus a relatively long time and that while they're disconnected, 46 * having the SCBs for that device down on the host adapter is of little use. 47 * Instead we copy the SCB back up into kernel memory and reuse the SCB slot 48 * on the card to schedule another transaction. This can be a real payoff 49 * when doing random I/O to tagged queueing devices since there are more 50 * transactions active at once for the device to sort for optimal seek 51 * reduction. The algorithm goes like this... 52 * 53 * At the sequencer level: 54 * 1) Disconnected SCBs are threaded onto a doubly linked list, headed by 55 * DISCONNECTED_SCBH using the SCB_NEXT and SCB_PREV fields. The most 56 * recently disconnected device is always at the head. 57 * 58 * 2) The SCB has an added field SCB_TAG that corresponds to the kernel 59 * SCB number (ie 0-254). 60 * 61 * 3) When a command is queued, the hardware index of the SCB it was downloaded 62 * into is placed into the QINFIFO for easy indexing by the sequencer. 63 * 64 * 4) The tag field is used as the tag for tagged-queueing, for determining 65 * the related kernel SCB, and is the value put into the QOUTFIFO 66 * so the kernel doesn't have to upload the SCB to determine the kernel SCB 67 * that completed on command completes. 68 * 69 * 5) When a reconnect occurs, the sequencer must scan the SCB array (even 70 * in the tag case) looking for the appropriate SCB and if it can't find 71 * it, it interrupts the kernel so it can page the SCB in. 72 * 73 * 6) If the sequencer is successful in finding the SCB, it removes it from 74 * the doubly linked list of disconnected SCBS. 75 * 76 * At the kernel level: 77 * 1) There are four queues that a kernel SCB may reside on: 78 * free_scbs - SCBs that are not in use and have a hardware slot assigned 79 * to them. 80 * page_scbs - SCBs that are not in use and need to have a hardware slot 81 * assigned to them (i.e. they will most likely cause a page 82 * out event). 83 * waiting_scbs - SCBs that are active, don't have an assigned hardware 84 * slot assigned to them and are waiting for either a 85 * disconnection or a command complete to free up a slot. 86 * assigned_scbs - SCBs that were in the waiting_scbs queue, but were 87 * assigned a slot by ahc_free_scb. 88 * 89 * 2) When a new request comes in, an SCB is allocated from the free_scbs or 90 * page_scbs queue with preference to SCBs on the free_scbs queue. 91 * 92 * 3) If there are no free slots (we retrieved the SCB off of the page_scbs 93 * queue), the SCB is inserted onto the tail of the waiting_scbs list and 94 * we attempt to run this queue down. 95 * 96 * 4) ahc_run_waiting_queues() looks at both the assigned_scbs and waiting_scbs 97 * queues. In the case of the assigned_scbs, the commands are immediately 98 * downloaded and started. For waiting_scbs, we page in all that we can 99 * ensuring we don't create a resource deadlock (see comments in 100 * ahc_run_waiting_queues()). 101 * 102 * 5) After we handle a bunch of command completes, we also try running the 103 * queues since many SCBs may have disconnected since the last command 104 * was started and we have at least one free slot on the card. 105 * 106 * 6) ahc_free_scb looks at the waiting_scbs queue for a transaction 107 * requiring a slot and moves it to the assigned_scbs queue if it 108 * finds one. Otherwise it puts the current SCB onto the free_scbs 109 * queue for later use. 110 * 111 * 7) The driver handles page-in requests from the sequencer in response to 112 * the NO_MATCH sequencer interrupt. For tagged commands, the appropriate 113 * SCB is easily found since the tag is a direct index into our kernel SCB 114 * array. For non-tagged commands, we keep a separate array of 16 pointers 115 * that point to the single possible SCB that was paged out for that target. 116 */ 117 118 #include <sys/param.h> 119 #include <sys/systm.h> 120 #if defined(__NetBSD__) 121 #include <sys/device.h> 122 #include <machine/bus.h> 123 #include <machine/intr.h> 124 #endif /* defined(__NetBSD__) */ 125 126 #include <sys/malloc.h> 127 #include <sys/buf.h> 128 #include <sys/proc.h> 129 130 #include <scsi/scsi_all.h> 131 #include <scsi/scsi_message.h> 132 #if defined(__NetBSD__) 133 #include <scsi/scsi_debug.h> 134 #endif 135 #include <scsi/scsiconf.h> 136 137 #if defined(__FreeBSD__) 138 #include <machine/clock.h> 139 #endif 140 141 #include <vm/vm.h> 142 #include <vm/vm_param.h> 143 #include <vm/pmap.h> 144 145 #if defined(__FreeBSD__) 146 #include <i386/scsi/aic7xxx.h> 147 148 #include <dev/aic7xxx/aic7xxx_reg.h> 149 #endif /* defined(__FreeBSD__) */ 150 151 #if defined(__NetBSD__) 152 #include <dev/ic/aic7xxxreg.h> 153 #include <dev/ic/aic7xxxvar.h> 154 155 #define bootverbose 1 156 157 #define DEBUGTARG DEBUGTARGET 158 #if DEBUGTARG < 0 /* Negative numbers for disabling cause warnings */ 159 #undef DEBUGTARG 160 #define DEBUGTARG 17 161 #endif 162 #ifdef alpha /* XXX */ 163 /* XXX XXX NEED REAL DMA MAPPING SUPPORT XXX XXX */ 164 extern vm_offset_t alpha_XXX_dmamap(vm_offset_t); 165 #undef vtophys 166 #define vtophys(va) alpha_XXX_dmamap((vm_offset_t) va) 167 #endif /* alpha */ 168 #endif /* defined(__NetBSD__) */ 169 170 #include <sys/kernel.h> 171 #define KVTOPHYS(x) vtophys(x) 172 173 #define MIN(a,b) ((a < b) ? a : b) 174 #define ALL_TARGETS -1 175 176 #if defined(__FreeBSD__) 177 u_long ahc_unit = 0; 178 #endif 179 180 #ifdef AHC_DEBUG 181 static int ahc_debug = AHC_DEBUG; 182 #endif 183 184 #ifdef AHC_BROKEN_CACHE 185 int ahc_broken_cache = 1; 186 187 /* 188 * "wbinvd" cause writing back whole cache (both CPU internal & external) 189 * to memory, so that the instruction takes a lot of time. 190 * This makes machine slow. 191 */ 192 #define INVALIDATE_CACHE() __asm __volatile("wbinvd") 193 #endif 194 195 /**** bit definitions for SCSIDEF ****/ 196 #define HSCSIID 0x07 /* our SCSI ID */ 197 #define HWSCSIID 0x0f /* our SCSI ID if Wide Bus */ 198 199 static void ahcminphys __P((struct buf *bp)); 200 static int32_t ahc_scsi_cmd __P((struct scsi_xfer *xs)); 201 static inline void pause_sequencer __P((struct ahc_data *ahc)); 202 static inline void unpause_sequencer __P((struct ahc_data *ahc, 203 int unpause_always)); 204 static inline void restart_sequencer __P((struct ahc_data *ahc)); 205 206 static struct scsi_adapter ahc_switch = 207 { 208 ahc_scsi_cmd, 209 ahcminphys, 210 0, 211 0, 212 #if defined(__FreeBSD__) 213 0, 214 "ahc", 215 { 0, 0 } 216 #endif 217 }; 218 219 /* the below structure is so we have a default dev struct for our link struct */ 220 static struct scsi_device ahc_dev = 221 { 222 NULL, /* Use default error handler */ 223 NULL, /* have a queue, served by this */ 224 NULL, /* have no async handler */ 225 NULL, /* Use default 'done' routine */ 226 #if defined(__FreeBSD__) 227 "ahc", 228 0, 229 { 0, 0 } 230 #endif 231 }; 232 233 static inline void 234 pause_sequencer(ahc) 235 struct ahc_data *ahc; 236 { 237 AHC_OUTB(ahc, HCNTRL, ahc->pause); 238 239 /* 240 * Since the sequencer can disable pausing in a critical section, we 241 * must loop until it actually stops. 242 */ 243 while ((AHC_INB(ahc, HCNTRL) & PAUSE) == 0) 244 ; 245 } 246 247 static inline void 248 unpause_sequencer(ahc, unpause_always) 249 struct ahc_data *ahc; 250 int unpause_always; 251 { 252 if (unpause_always 253 ||(AHC_INB(ahc, INTSTAT) & (SCSIINT | SEQINT | BRKADRINT)) == 0) 254 AHC_OUTB(ahc, HCNTRL, ahc->unpause); 255 } 256 257 /* 258 * Restart the sequencer program from address zero 259 */ 260 static inline void 261 restart_sequencer(ahc) 262 struct ahc_data *ahc; 263 { 264 do { 265 AHC_OUTB(ahc, SEQCTL, SEQRESET|FASTMODE); 266 } while((AHC_INB(ahc, SEQADDR0) != 0) 267 || (AHC_INB(ahc, SEQADDR1) != 0)); 268 269 unpause_sequencer(ahc, /*unpause_always*/TRUE); 270 } 271 272 #if defined(__NetBSD__) 273 /* 274 * Is device which is pointed by sc_link connected on second scsi bus ? 275 */ 276 #define IS_SCSIBUS_B(ahc, sc_link) \ 277 ((sc_link)->scsibus == (ahc)->sc_link_b.scsibus) 278 279 /* 280 * convert FreeBSD's SCSI symbols to NetBSD's 281 */ 282 #define SCSI_NOMASK SCSI_POLL 283 #define opennings openings 284 #endif 285 286 static u_char ahc_abort_wscb __P((struct ahc_data *ahc, struct scb *scbp, 287 u_char prev, 288 u_char timedout_scb, u_int32_t xs_error)); 289 static void ahc_add_waiting_scb __P((struct ahc_data *ahc, 290 struct scb *scb)); 291 static void ahc_done __P((struct ahc_data *ahc, struct scb *scbp)); 292 static void ahc_free_scb __P((struct ahc_data *ahc, struct scb *scb, 293 int flags)); 294 static inline void ahc_send_scb __P((struct ahc_data *ahc, struct scb *scb)); 295 static inline void ahc_fetch_scb __P((struct ahc_data *ahc, struct scb *scb)); 296 static inline void ahc_page_scb __P((struct ahc_data *ahc, struct scb *out_scb, 297 struct scb *in_scb)); 298 static inline void ahc_run_waiting_queues __P((struct ahc_data *ahc)); 299 static void ahc_handle_seqint __P((struct ahc_data *ahc, u_int8_t intstat)); 300 static struct scb * 301 ahc_get_scb __P((struct ahc_data *ahc, int flags)); 302 static void ahc_loadseq __P((struct ahc_data *ahc)); 303 static int ahc_match_scb __P((struct scb *scb, int target, char channel)); 304 static int ahc_poll __P((struct ahc_data *ahc, int wait)); 305 #ifdef AHC_DEBUG 306 static void ahc_print_scb __P((struct scb *scb)); 307 #endif 308 static int ahc_reset_channel __P((struct ahc_data *ahc, char channel, 309 u_char timedout_scb, u_int32_t xs_error, 310 u_char initiate_reset)); 311 static int ahc_reset_device __P((struct ahc_data *ahc, int target, 312 char channel, u_char timedout_scb, 313 u_int32_t xs_error)); 314 static void ahc_reset_current_bus __P((struct ahc_data *ahc)); 315 static void ahc_run_done_queue __P((struct ahc_data *ahc)); 316 static void ahc_scsirate __P((struct ahc_data* ahc, u_int8_t *scsirate, 317 u_int8_t *period, u_int8_t *offset, 318 char channel, int target)); 319 #if defined(__FreeBSD__) 320 static timeout_t 321 ahc_timeout; 322 #elif defined(__NetBSD__) 323 static void ahc_timeout __P((void *)); 324 #endif 325 static void ahc_busy_target __P((struct ahc_data *ahc, 326 int target, char channel)); 327 static void ahc_unbusy_target __P((struct ahc_data *ahc, 328 int target, char channel)); 329 static void ahc_construct_sdtr __P((struct ahc_data *ahc, int start_byte, 330 u_int8_t period, u_int8_t offset)); 331 static void ahc_construct_wdtr __P((struct ahc_data *ahc, int start_byte, 332 u_int8_t bus_width)); 333 334 #if defined(__NetBSD__) /* XXX */ 335 static void ahc_xxx_enqueue __P((struct ahc_data *ahc, 336 struct scsi_xfer *xs, int infront)); 337 static struct scsi_xfer *ahc_xxx_dequeue __P((struct ahc_data *ahc)); 338 #endif 339 340 #if defined(__FreeBSD__) 341 342 char *ahc_name(ahc) 343 struct ahc_data *ahc; 344 { 345 static char name[10]; 346 347 sprintf(name, "ahc%d", ahc->unit); 348 return (name); 349 } 350 351 #elif defined(__NetBSD__) 352 struct cfdriver ahc_cd = { 353 NULL, "ahc", DV_DULL 354 }; 355 #endif 356 357 #ifdef AHC_DEBUG 358 static void 359 ahc_print_scb(scb) 360 struct scb *scb; 361 { 362 printf("scb:%p control:0x%x tcl:0x%x cmdlen:%d cmdpointer:0x%lx\n" 363 ,scb 364 ,scb->control 365 ,scb->tcl 366 ,scb->cmdlen 367 ,scb->cmdpointer ); 368 printf(" datlen:%d data:0x%lx segs:0x%x segp:0x%lx\n" 369 ,scb->datalen 370 ,scb->data 371 ,scb->SG_segment_count 372 ,scb->SG_list_pointer); 373 printf(" sg_addr:%lx sg_len:%ld\n" 374 ,scb->ahc_dma[0].addr 375 ,scb->ahc_dma[0].len); 376 } 377 378 #endif 379 380 static struct { 381 u_char errno; 382 char *errmesg; 383 } hard_error[] = { 384 { ILLHADDR, "Illegal Host Access" }, 385 { ILLSADDR, "Illegal Sequencer Address referenced" }, 386 { ILLOPCODE, "Illegal Opcode in sequencer program" }, 387 { PARERR, "Sequencer Ram Parity Error" } 388 }; 389 390 391 /* 392 * Valid SCSIRATE values. (p. 3-17) 393 * Provides a mapping of tranfer periods in ns to the proper value to 394 * stick in the scsiscfr reg to use that transfer rate. 395 */ 396 static struct { 397 short sxfr; 398 /* Rates in Ultra mode have bit 8 of sxfr set */ 399 #define ULTRA_SXFR 0x100 400 int period; /* in ns/4 */ 401 char *rate; 402 } ahc_syncrates[] = { 403 { 0x100, 12, "20.0" }, 404 { 0x110, 15, "16.0" }, 405 { 0x120, 18, "13.4" }, 406 { 0x000, 25, "10.0" }, 407 { 0x010, 31, "8.0" }, 408 { 0x020, 37, "6.67" }, 409 { 0x030, 43, "5.7" }, 410 { 0x040, 50, "5.0" }, 411 { 0x050, 56, "4.4" }, 412 { 0x060, 62, "4.0" }, 413 { 0x070, 68, "3.6" } 414 }; 415 416 static int ahc_num_syncrates = 417 sizeof(ahc_syncrates) / sizeof(ahc_syncrates[0]); 418 419 /* 420 * Allocate a controller structure for a new device and initialize it. 421 * ahc_reset should be called before now since we assume that the card 422 * is paused. 423 */ 424 #if defined(__FreeBSD__) 425 struct ahc_data * 426 ahc_alloc(unit, iobase, type, flags) 427 int unit; 428 u_long iobase; 429 #elif defined(__NetBSD__) 430 void 431 ahc_construct(ahc, st, sh, type, flags) 432 struct ahc_data *ahc; 433 bus_space_tag_t st; 434 bus_space_handle_t sh; 435 #endif 436 ahc_type type; 437 ahc_flag flags; 438 { 439 440 /* 441 * find unit and check we have that many defined 442 */ 443 444 #if defined(__FreeBSD__) 445 struct ahc_data *ahc; 446 447 /* 448 * Allocate a storage area for us 449 */ 450 451 ahc = malloc(sizeof(struct ahc_data), M_TEMP, M_NOWAIT); 452 if (!ahc) { 453 printf("ahc%d: cannot malloc!\n", unit); 454 return NULL; 455 } 456 bzero(ahc, sizeof(struct ahc_data)); 457 #endif 458 STAILQ_INIT(&ahc->free_scbs); 459 STAILQ_INIT(&ahc->page_scbs); 460 STAILQ_INIT(&ahc->waiting_scbs); 461 STAILQ_INIT(&ahc->assigned_scbs); 462 #if defined(__FreeBSD__) 463 ahc->unit = unit; 464 #endif 465 #if defined(__FreeBSD__) 466 ahc->baseport = iobase; 467 #elif defined(__NetBSD__) 468 ahc->sc_st = st; 469 ahc->sc_sh = sh; 470 #endif 471 ahc->type = type; 472 ahc->flags = flags; 473 ahc->unpause = (AHC_INB(ahc, HCNTRL) & IRQMS) | INTEN; 474 ahc->pause = ahc->unpause | PAUSE; 475 476 #if defined(__FreeBSD__) 477 return (ahc); 478 #endif 479 } 480 481 void 482 ahc_free(ahc) 483 struct ahc_data *ahc; 484 { 485 #if defined(__FreeBSD__) 486 free(ahc, M_DEVBUF); 487 return; 488 #endif 489 } 490 491 void 492 #if defined(__FreeBSD__) 493 ahc_reset(iobase) 494 u_long iobase; 495 #elif defined(__NetBSD__) 496 ahc_reset(devname, st, sh) 497 char *devname; 498 bus_space_tag_t st; 499 bus_space_handle_t sh; 500 #endif 501 { 502 u_char hcntrl; 503 int wait; 504 505 /* Retain the IRQ type accross the chip reset */ 506 #if defined(__FreeBSD__) 507 hcntrl = (inb(HCNTRL + iobase) & IRQMS) | INTEN; 508 509 outb(HCNTRL + iobase, CHIPRST | PAUSE); 510 #elif defined(__NetBSD__) 511 hcntrl = (bus_space_read_1(st, sh, HCNTRL) & IRQMS) | INTEN; 512 513 bus_space_write_1(st, sh, HCNTRL, CHIPRST | PAUSE); 514 #endif 515 /* 516 * Ensure that the reset has finished 517 */ 518 wait = 1000; 519 #if defined(__FreeBSD__) 520 while (--wait && !(inb(HCNTRL + iobase) & CHIPRSTACK)) 521 #elif defined(__NetBSD__) 522 while (--wait && !(bus_space_read_1(st, sh, HCNTRL) & CHIPRSTACK)) 523 #endif 524 DELAY(1000); 525 if(wait == 0) { 526 #if defined(__FreeBSD__) 527 printf("ahc at 0x%lx: WARNING - Failed chip reset! " 528 "Trying to initialize anyway.\n", iobase); 529 #elif defined(__NetBSD__) 530 printf("%s: WARNING - Failed chip reset! " 531 "Trying to initialize anyway.\n", devname); 532 #endif 533 } 534 #if defined(__FreeBSD__) 535 outb(HCNTRL + iobase, hcntrl | PAUSE); 536 #elif defined(__NetBSD__) 537 bus_space_write_1(st, sh, HCNTRL, hcntrl | PAUSE); 538 #endif 539 } 540 541 /* 542 * Look up the valid period to SCSIRATE conversion in our table. 543 */ 544 static void 545 ahc_scsirate(ahc, scsirate, period, offset, channel, target ) 546 struct ahc_data *ahc; 547 u_int8_t *scsirate; 548 u_int8_t *period; 549 u_int8_t *offset; 550 char channel; 551 int target; 552 { 553 int i; 554 u_int32_t ultra_enb_addr; 555 u_int8_t sxfrctl0; 556 u_int8_t ultra_enb; 557 558 i = ahc_num_syncrates; /* Default to async */ 559 560 if (*period >= ahc_syncrates[0].period && *offset != 0) { 561 for (i = 0; i < ahc_num_syncrates; i++) { 562 563 if (*period <= ahc_syncrates[i].period) { 564 /* 565 * Watch out for Ultra speeds when ultra is not 566 * enabled and vice-versa. 567 */ 568 if(!(ahc->type & AHC_ULTRA) 569 && (ahc_syncrates[i].sxfr & ULTRA_SXFR)) { 570 /* 571 * This should only happen if the 572 * drive is the first to negotiate 573 * and chooses a high rate. We'll 574 * just move down the table util 575 * we hit a non ultra speed. 576 */ 577 continue; 578 } 579 *scsirate = (ahc_syncrates[i].sxfr & 0xF0) 580 | (*offset & 0x0f); 581 *period = ahc_syncrates[i].period; 582 583 if(bootverbose) { 584 printf("%s: target %d synchronous at %sMHz," 585 " offset = 0x%x\n", 586 ahc_name(ahc), target, 587 ahc_syncrates[i].rate, *offset ); 588 } 589 break; 590 } 591 } 592 } 593 if (i >= ahc_num_syncrates) { 594 /* Use asynchronous transfers. */ 595 *scsirate = 0; 596 *period = 0; 597 *offset = 0; 598 if (bootverbose) 599 printf("%s: target %d using asynchronous transfers\n", 600 ahc_name(ahc), target ); 601 } 602 /* 603 * Ensure Ultra mode is set properly for 604 * this target. 605 */ 606 ultra_enb_addr = ULTRA_ENB; 607 if(channel == 'B' || target > 7) 608 ultra_enb_addr++; 609 ultra_enb = AHC_INB(ahc, ultra_enb_addr); 610 sxfrctl0 = AHC_INB(ahc, SXFRCTL0); 611 if (*scsirate != 0 && ahc_syncrates[i].sxfr & ULTRA_SXFR) { 612 ultra_enb |= 0x01 << (target & 0x07); 613 sxfrctl0 |= ULTRAEN; 614 } 615 else { 616 ultra_enb &= ~(0x01 << (target & 0x07)); 617 sxfrctl0 &= ~ULTRAEN; 618 } 619 AHC_OUTB(ahc, ultra_enb_addr, ultra_enb); 620 AHC_OUTB(ahc, SXFRCTL0, sxfrctl0); 621 } 622 623 /* 624 * Attach all the sub-devices we can find 625 */ 626 int 627 ahc_attach(ahc) 628 struct ahc_data *ahc; 629 { 630 #if defined(__FreeBSD__) 631 struct scsibus_data *scbus; 632 #endif 633 634 #if defined(__NetBSD__) /* XXX */ 635 /* 636 * Initialize the software queue. 637 */ 638 LIST_INIT(&ahc->sc_xxxq); 639 #endif 640 641 #ifdef AHC_BROKEN_CACHE 642 if (cpu_class == CPUCLASS_386) /* doesn't have "wbinvd" instruction */ 643 ahc_broken_cache = 0; 644 #endif 645 /* 646 * fill in the prototype scsi_links. 647 */ 648 #if defined(__FreeBSD__) 649 ahc->sc_link.adapter_unit = ahc->unit; 650 ahc->sc_link.adapter_targ = ahc->our_id; 651 ahc->sc_link.fordriver = 0; 652 #elif defined(__NetBSD__) 653 ahc->sc_link.adapter_target = ahc->our_id; 654 ahc->sc_link.channel = 0; 655 /* 656 * Set up max_target. 657 */ 658 ahc->sc_link.max_target = (ahc->type & AHC_WIDE) ? 15 : 7; 659 #endif 660 ahc->sc_link.adapter_softc = ahc; 661 ahc->sc_link.adapter = &ahc_switch; 662 ahc->sc_link.opennings = 2; 663 ahc->sc_link.device = &ahc_dev; 664 ahc->sc_link.flags = DEBUGLEVEL; 665 666 if(ahc->type & AHC_TWIN) { 667 /* Configure the second scsi bus */ 668 ahc->sc_link_b = ahc->sc_link; 669 #if defined(__FreeBSD__) 670 ahc->sc_link_b.adapter_targ = ahc->our_id_b; 671 ahc->sc_link_b.adapter_bus = 1; 672 ahc->sc_link_b.fordriver = (void *)SELBUSB; 673 #elif defined(__NetBSD__) 674 ahc->sc_link_b.adapter_target = ahc->our_id_b; 675 ahc->sc_link_b.channel = 1; 676 #endif 677 } 678 679 680 #if defined(__FreeBSD__) 681 /* 682 * Prepare the scsibus_data area for the upperlevel 683 * scsi code. 684 */ 685 scbus = scsi_alloc_bus(); 686 if(!scbus) 687 return 0; 688 scbus->adapter_link = (ahc->flags & AHC_CHANNEL_B_PRIMARY) ? 689 &ahc->sc_link_b : &ahc->sc_link; 690 if(ahc->type & AHC_WIDE) 691 scbus->maxtarg = 15; 692 693 /* 694 * ask the adapter what subunits are present 695 */ 696 if(bootverbose) 697 printf("ahc%d: Probing channel %c\n", ahc->unit, 698 (ahc->flags & AHC_CHANNEL_B_PRIMARY) ? 'B' : 'A'); 699 scsi_attachdevs(scbus); 700 scbus = NULL; /* Upper-level SCSI code owns this now */ 701 702 if(ahc->type & AHC_TWIN) { 703 scbus = scsi_alloc_bus(); 704 if(!scbus) 705 return 0; 706 scbus->adapter_link = (ahc->flags & AHC_CHANNEL_B_PRIMARY) ? 707 &ahc->sc_link : &ahc->sc_link_b; 708 if(ahc->type & AHC_WIDE) 709 scbus->maxtarg = 15; 710 if(bootverbose) 711 printf("ahc%d: Probing Channel %c\n", ahc->unit, 712 (ahc->flags & AHC_CHANNEL_B_PRIMARY) ? 'A': 'B'); 713 scsi_attachdevs(scbus); 714 scbus = NULL; /* Upper-level SCSI code owns this now */ 715 } 716 #elif defined(__NetBSD__) 717 /* 718 * ask the adapter what subunits are present 719 */ 720 if ((ahc->flags & AHC_CHANNEL_B_PRIMARY) == 0) { 721 /* make IS_SCSIBUS_B() == false, while probing channel A */ 722 ahc->sc_link_b.scsibus = 0xff; 723 724 config_found((void *)ahc, &ahc->sc_link, scsiprint); 725 if (ahc->type & AHC_TWIN) 726 config_found((void *)ahc, &ahc->sc_link_b, scsiprint); 727 } else { 728 /* 729 * if implementation of IS_SCSIBUS_B() is changed to use 730 * ahc->sc_link.scsibus, then "ahc->sc_link.scsibus = 0xff;" 731 * is needed, here. 732 */ 733 734 /* assert(ahc->type & AHC_TWIN); */ 735 config_found((void *)ahc, &ahc->sc_link_b, scsiprint); 736 config_found((void *)ahc, &ahc->sc_link, scsiprint); 737 } 738 #endif 739 return 1; 740 } 741 742 /* 743 * Send an SCB down to the card via PIO. 744 * We assume that the proper SCB is already selected in SCBPTR. 745 */ 746 static inline void 747 ahc_send_scb(ahc, scb) 748 struct ahc_data *ahc; 749 struct scb *scb; 750 { 751 AHC_OUTB(ahc, SCBCNT, SCBAUTO); 752 if( ahc->type == AHC_284 ) 753 /* Can only do 8bit PIO */ 754 AHC_OUTSB(ahc, SCBARRAY, scb, SCB_PIO_TRANSFER_SIZE); 755 else 756 AHC_OUTSL(ahc, SCBARRAY, scb, 757 (SCB_PIO_TRANSFER_SIZE + 3) / 4); 758 AHC_OUTB(ahc, SCBCNT, 0); 759 } 760 761 /* 762 * Retrieve an SCB from the card via PIO. 763 * We assume that the proper SCB is already selected in SCBPTR. 764 */ 765 static inline void 766 ahc_fetch_scb(ahc, scb) 767 struct ahc_data *ahc; 768 struct scb *scb; 769 { 770 AHC_OUTB(ahc, SCBCNT, 0x80); /* SCBAUTO */ 771 772 /* Can only do 8bit PIO for reads */ 773 AHC_INSB(ahc, SCBARRAY, scb, SCB_PIO_TRANSFER_SIZE); 774 775 AHC_OUTB(ahc, SCBCNT, 0); 776 } 777 778 /* 779 * Swap in_scbp for out_scbp down in the cards SCB array. 780 * We assume that the SCB for out_scbp is already selected in SCBPTR. 781 */ 782 static inline void 783 ahc_page_scb(ahc, out_scbp, in_scbp) 784 struct ahc_data *ahc; 785 struct scb *out_scbp; 786 struct scb *in_scbp; 787 { 788 /* Page-out */ 789 ahc_fetch_scb(ahc, out_scbp); 790 out_scbp->flags |= SCB_PAGED_OUT; 791 if(!(out_scbp->control & TAG_ENB)) 792 { 793 /* Stick in non-tagged array */ 794 int index = (out_scbp->tcl >> 4) 795 | (out_scbp->tcl & SELBUSB); 796 ahc->pagedout_ntscbs[index] = out_scbp; 797 } 798 799 /* Page-in */ 800 in_scbp->position = out_scbp->position; 801 out_scbp->position = SCB_LIST_NULL; 802 ahc_send_scb(ahc, in_scbp); 803 in_scbp->flags &= ~SCB_PAGED_OUT; 804 } 805 806 static inline void 807 ahc_run_waiting_queues(ahc) 808 struct ahc_data *ahc; 809 { 810 struct scb* scb; 811 u_char cur_scb; 812 813 if(!(ahc->assigned_scbs.stqh_first || ahc->waiting_scbs.stqh_first)) 814 return; 815 816 pause_sequencer(ahc); 817 cur_scb = AHC_INB(ahc, SCBPTR); 818 819 /* 820 * First handle SCBs that are waiting but have been 821 * assigned a slot. 822 */ 823 while((scb = ahc->assigned_scbs.stqh_first) != NULL) { 824 STAILQ_REMOVE_HEAD(&ahc->assigned_scbs, links); 825 AHC_OUTB(ahc, SCBPTR, scb->position); 826 ahc_send_scb(ahc, scb); 827 828 /* Mark this as an active command */ 829 scb->flags ^= SCB_ASSIGNEDQ|SCB_ACTIVE; 830 831 AHC_OUTB(ahc, QINFIFO, scb->position); 832 if (!(scb->xs->flags & SCSI_NOMASK)) { 833 timeout(ahc_timeout, (caddr_t)scb, 834 (scb->xs->timeout * hz) / 1000); 835 } 836 SC_DEBUG(scb->xs->sc_link, SDEV_DB3, ("cmd_sent\n")); 837 } 838 /* Now deal with SCBs that require paging */ 839 if((scb = ahc->waiting_scbs.stqh_first) != NULL) { 840 u_char disc_scb = AHC_INB(ahc, DISCONNECTED_SCBH); 841 u_char active = AHC_INB(ahc, FLAGS) & (SELECTED|IDENTIFY_SEEN); 842 int count = 0; 843 844 do { 845 u_char next_scb; 846 847 /* Attempt to page this SCB in */ 848 if(disc_scb == SCB_LIST_NULL) 849 break; 850 851 /* 852 * Check the next SCB on in the list. 853 */ 854 AHC_OUTB(ahc, SCBPTR, disc_scb); 855 next_scb = AHC_INB(ahc, SCB_NEXT); 856 857 /* 858 * We have to be careful about when we allow 859 * an SCB to be paged out. There must always 860 * be at least one slot available for a 861 * reconnecting target in case it references 862 * an SCB that has been paged out. Our 863 * heuristic is that either the disconnected 864 * list has at least two entries in it or 865 * there is one entry and the sequencer is 866 * actively working on an SCB which implies that 867 * it will either complete or disconnect before 868 * another reconnection can occur. 869 */ 870 if((next_scb != SCB_LIST_NULL) || active) 871 { 872 u_char out_scbi; 873 struct scb* out_scbp; 874 875 STAILQ_REMOVE_HEAD(&ahc->waiting_scbs, links); 876 877 /* 878 * Find the in-core SCB for the one 879 * we're paging out. 880 */ 881 out_scbi = AHC_INB(ahc, SCB_TAG); 882 out_scbp = ahc->scbarray[out_scbi]; 883 884 /* Do the page out */ 885 ahc_page_scb(ahc, out_scbp, scb); 886 887 /* Mark this as an active command */ 888 scb->flags ^= SCB_WAITINGQ|SCB_ACTIVE; 889 890 /* Queue the command */ 891 AHC_OUTB(ahc, QINFIFO, scb->position); 892 if (!(scb->xs->flags & SCSI_NOMASK)) { 893 timeout(ahc_timeout, (caddr_t)scb, 894 (scb->xs->timeout * hz) / 1000); 895 } 896 SC_DEBUG(scb->xs->sc_link, SDEV_DB3, 897 ("cmd_paged-in\n")); 898 count++; 899 900 /* Advance to the next disconnected SCB */ 901 disc_scb = next_scb; 902 } 903 else 904 break; 905 } while((scb = ahc->waiting_scbs.stqh_first) != NULL); 906 907 if(count) { 908 /* 909 * Update the head of the disconnected list. 910 */ 911 AHC_OUTB(ahc, DISCONNECTED_SCBH, disc_scb); 912 if(disc_scb != SCB_LIST_NULL) { 913 AHC_OUTB(ahc, SCBPTR, disc_scb); 914 AHC_OUTB(ahc, SCB_PREV, SCB_LIST_NULL); 915 } 916 } 917 } 918 /* Restore old position */ 919 AHC_OUTB(ahc, SCBPTR, cur_scb); 920 unpause_sequencer(ahc, /*unpause_always*/FALSE); 921 } 922 923 /* 924 * Add this SCB to the head of the "waiting for selection" list. 925 */ 926 static 927 void ahc_add_waiting_scb(ahc, scb) 928 struct ahc_data *ahc; 929 struct scb *scb; 930 { 931 u_char next; 932 u_char curscb; 933 934 curscb = AHC_INB(ahc, SCBPTR); 935 next = AHC_INB(ahc, WAITING_SCBH); 936 937 AHC_OUTB(ahc, SCBPTR, scb->position); 938 AHC_OUTB(ahc, SCB_NEXT, next); 939 AHC_OUTB(ahc, WAITING_SCBH, scb->position); 940 941 AHC_OUTB(ahc, SCBPTR, curscb); 942 } 943 944 /* 945 * Catch an interrupt from the adapter 946 */ 947 #if defined(__FreeBSD__) 948 void 949 #elif defined (__NetBSD__) 950 int 951 #endif 952 ahc_intr(arg) 953 void *arg; 954 { 955 int intstat; 956 u_char status; 957 struct scb *scb; 958 struct scsi_xfer *xs; 959 struct ahc_data *ahc = (struct ahc_data *)arg; 960 961 intstat = AHC_INB(ahc, INTSTAT); 962 /* 963 * Is this interrupt for me? or for 964 * someone who is sharing my interrupt? 965 */ 966 if (!(intstat & INT_PEND)) 967 #if defined(__FreeBSD__) 968 return; 969 #elif defined(__NetBSD__) 970 return 0; 971 #endif 972 973 if (intstat & BRKADRINT) { 974 /* We upset the sequencer :-( */ 975 976 /* Lookup the error message */ 977 int i, error = AHC_INB(ahc, ERROR); 978 int num_errors = sizeof(hard_error)/sizeof(hard_error[0]); 979 for(i = 0; error != 1 && i < num_errors; i++) 980 error >>= 1; 981 panic("%s: brkadrint, %s at seqaddr = 0x%x\n", 982 ahc_name(ahc), hard_error[i].errmesg, 983 (AHC_INB(ahc, SEQADDR1) << 8) | 984 AHC_INB(ahc, SEQADDR0)); 985 } 986 if (intstat & SEQINT) 987 ahc_handle_seqint(ahc, intstat); 988 989 if (intstat & SCSIINT) { 990 991 int scb_index = AHC_INB(ahc, SCB_TAG); 992 status = AHC_INB(ahc, SSTAT1); 993 scb = ahc->scbarray[scb_index]; 994 995 if (status & SCSIRSTI) { 996 char channel; 997 channel = AHC_INB(ahc, SBLKCTL); 998 channel = channel & SELBUSB ? 'B' : 'A'; 999 printf("%s: Someone reset channel %c\n", 1000 ahc_name(ahc), channel); 1001 ahc_reset_channel(ahc, 1002 channel, 1003 SCB_LIST_NULL, 1004 XS_BUSY, 1005 /* Initiate Reset */FALSE); 1006 scb = NULL; 1007 } 1008 else if (!(scb && (scb->flags & SCB_ACTIVE))){ 1009 printf("%s: ahc_intr - referenced scb not " 1010 "valid during scsiint 0x%x scb(%d)\n", 1011 ahc_name(ahc), status, scb_index); 1012 AHC_OUTB(ahc, CLRSINT1, status); 1013 unpause_sequencer(ahc, /*unpause_always*/TRUE); 1014 AHC_OUTB(ahc, CLRINT, CLRSCSIINT); 1015 scb = NULL; 1016 } 1017 else if (status & SCSIPERR) { 1018 /* 1019 * Determine the bus phase and 1020 * queue an appropriate message 1021 */ 1022 char *phase; 1023 u_char mesg_out = MSG_NOOP; 1024 u_char lastphase = AHC_INB(ahc, LASTPHASE); 1025 1026 xs = scb->xs; 1027 sc_print_addr(xs->sc_link); 1028 1029 switch(lastphase) { 1030 case P_DATAOUT: 1031 phase = "Data-Out"; 1032 break; 1033 case P_DATAIN: 1034 phase = "Data-In"; 1035 mesg_out = MSG_INITIATOR_DET_ERR; 1036 break; 1037 case P_COMMAND: 1038 phase = "Command"; 1039 break; 1040 case P_MESGOUT: 1041 phase = "Message-Out"; 1042 break; 1043 case P_STATUS: 1044 phase = "Status"; 1045 mesg_out = MSG_INITIATOR_DET_ERR; 1046 break; 1047 case P_MESGIN: 1048 phase = "Message-In"; 1049 mesg_out = MSG_PARITY_ERROR; 1050 break; 1051 default: 1052 phase = "unknown"; 1053 break; 1054 } 1055 printf("parity error during %s phase.\n", phase); 1056 1057 /* 1058 * We've set the hardware to assert ATN if we 1059 * get a parity error on "in" phases, so all we 1060 * need to do is stuff the message buffer with 1061 * the appropriate message. "In" phases have set 1062 * mesg_out to something other than MSG_NOP. 1063 */ 1064 if(mesg_out != MSG_NOOP) { 1065 AHC_OUTB(ahc, MSG0, mesg_out); 1066 AHC_OUTB(ahc, MSG_LEN, 1); 1067 } 1068 else 1069 /* 1070 * Should we allow the target to make 1071 * this decision for us? 1072 */ 1073 xs->error = XS_DRIVER_STUFFUP; 1074 } 1075 else if (status & SELTO) { 1076 u_char waiting; 1077 u_char flags; 1078 1079 xs = scb->xs; 1080 xs->error = XS_SELTIMEOUT; 1081 /* 1082 * Clear any pending messages for the timed out 1083 * target, and mark the target as free 1084 */ 1085 flags = AHC_INB(ahc, FLAGS); 1086 AHC_OUTB(ahc, MSG_LEN, 0); 1087 ahc_unbusy_target(ahc, xs->sc_link->target, 1088 #if defined(__FreeBSD__) 1089 ((long)xs->sc_link->fordriver & SELBUSB) 1090 #elif defined(__NetBSD__) 1091 IS_SCSIBUS_B(ahc, xs->sc_link) 1092 #endif 1093 ? 'B' : 'A'); 1094 /* Stop the selection */ 1095 AHC_OUTB(ahc, SCSISEQ, 0); 1096 1097 AHC_OUTB(ahc, SCB_CONTROL, 0); 1098 1099 AHC_OUTB(ahc, CLRSINT1, CLRSELTIMEO); 1100 1101 AHC_OUTB(ahc, CLRINT, CLRSCSIINT); 1102 1103 /* Shift the waiting for selection queue forward */ 1104 waiting = AHC_INB(ahc, WAITING_SCBH); 1105 AHC_OUTB(ahc, SCBPTR, waiting); 1106 waiting = AHC_INB(ahc, SCB_NEXT); 1107 AHC_OUTB(ahc, WAITING_SCBH, waiting); 1108 1109 restart_sequencer(ahc); 1110 } 1111 else if (!(status & BUSFREE)) { 1112 sc_print_addr(scb->xs->sc_link); 1113 printf("Unknown SCSIINT. Status = 0x%x\n", status); 1114 AHC_OUTB(ahc, CLRSINT1, status); 1115 unpause_sequencer(ahc, /*unpause_always*/TRUE); 1116 AHC_OUTB(ahc, CLRINT, CLRSCSIINT); 1117 scb = NULL; 1118 } 1119 if(scb != NULL) { 1120 /* We want to process the command */ 1121 untimeout(ahc_timeout, (caddr_t)scb); 1122 ahc_done(ahc, scb); 1123 } 1124 } 1125 if (intstat & CMDCMPLT) { 1126 int scb_index; 1127 1128 do { 1129 scb_index = AHC_INB(ahc, QOUTFIFO); 1130 scb = ahc->scbarray[scb_index]; 1131 if (!scb || !(scb->flags & SCB_ACTIVE)) { 1132 printf("%s: WARNING " 1133 "no command for scb %d (cmdcmplt)\n" 1134 "QOUTCNT == %d\n", 1135 ahc_name(ahc), scb_index, 1136 AHC_INB(ahc, QOUTCNT)); 1137 AHC_OUTB(ahc, CLRINT, CLRCMDINT); 1138 continue; 1139 } 1140 AHC_OUTB(ahc, CLRINT, CLRCMDINT); 1141 untimeout(ahc_timeout, (caddr_t)scb); 1142 ahc_done(ahc, scb); 1143 1144 } while (AHC_INB(ahc, QOUTCNT) & ahc->qcntmask); 1145 1146 ahc_run_waiting_queues(ahc); 1147 } 1148 #if defined(__NetBSD__) 1149 return 1; 1150 #endif 1151 } 1152 1153 static void 1154 ahc_handle_seqint(ahc, intstat) 1155 struct ahc_data *ahc; 1156 u_int8_t intstat; 1157 { 1158 struct scb *scb; 1159 u_short targ_mask; 1160 u_char target = (AHC_INB(ahc, SCSIID) >> 4) & 0x0f; 1161 u_char scratch_offset = target; 1162 char channel = AHC_INB(ahc, SBLKCTL) & SELBUSB ? 'B': 'A'; 1163 1164 if (channel == 'B') 1165 scratch_offset += 8; 1166 targ_mask = (0x01 << scratch_offset); 1167 1168 switch (intstat & SEQINT_MASK) { 1169 case NO_MATCH: 1170 if (ahc->flags & AHC_PAGESCBS) { 1171 /* SCB Page-in request */ 1172 u_char tag; 1173 u_char next; 1174 u_char disc_scb; 1175 struct scb *outscb; 1176 u_char arg_1 = AHC_INB(ahc, ARG_1); 1177 1178 /* 1179 * We should succeed, so set this now. 1180 * If we don't, and one of the methods 1181 * we use to aquire an SCB calls ahc_done, 1182 * we may wind up in our start routine 1183 * and unpause the adapter without giving 1184 * it the correct return value, which will 1185 * cause a hang. 1186 */ 1187 AHC_OUTB(ahc, RETURN_1, SCB_PAGEDIN); 1188 1189 if (arg_1 == SCB_LIST_NULL) { 1190 /* Non-tagged command */ 1191 int index; 1192 1193 index = target|(channel == 'B' ? SELBUSB : 0); 1194 scb = ahc->pagedout_ntscbs[index]; 1195 } else 1196 scb = ahc->scbarray[arg_1]; 1197 1198 if (!(scb->flags & SCB_PAGED_OUT)) 1199 panic("%s: Request to page in a non paged out " 1200 "SCB.", ahc_name(ahc)); 1201 /* 1202 * Now to pick the SCB to page out. 1203 * Either take a free SCB, an assigned SCB, 1204 * an SCB that just completed, the first 1205 * one on the disconnected SCB list, or 1206 * as a last resort a queued SCB. 1207 */ 1208 if (ahc->free_scbs.stqh_first) { 1209 outscb = ahc->free_scbs.stqh_first; 1210 STAILQ_REMOVE_HEAD(&ahc->free_scbs, links); 1211 scb->position = outscb->position; 1212 outscb->position = SCB_LIST_NULL; 1213 STAILQ_INSERT_HEAD(&ahc->page_scbs, outscb, 1214 links); 1215 AHC_OUTB(ahc, SCBPTR, scb->position); 1216 ahc_send_scb(ahc, scb); 1217 scb->flags &= ~SCB_PAGED_OUT; 1218 goto pagein_done; 1219 } 1220 if (intstat & CMDCMPLT) { 1221 int scb_index; 1222 1223 AHC_OUTB(ahc, CLRINT, CLRCMDINT); 1224 scb_index = AHC_INB(ahc, QOUTFIFO); 1225 if (!(AHC_INB(ahc, QOUTCNT) & ahc->qcntmask)) 1226 intstat &= ~CMDCMPLT; 1227 1228 outscb = ahc->scbarray[scb_index]; 1229 if (!outscb || !(outscb->flags & SCB_ACTIVE)) { 1230 printf("%s: WARNING no command for " 1231 "scb %d (cmdcmplt)\n", 1232 ahc_name(ahc), 1233 scb_index); 1234 /* 1235 * Fall through in hopes of finding 1236 * another SCB 1237 */ 1238 } else { 1239 scb->position = outscb->position; 1240 outscb->position = SCB_LIST_NULL; 1241 AHC_OUTB(ahc, SCBPTR, scb->position); 1242 ahc_send_scb(ahc, scb); 1243 scb->flags &= ~SCB_PAGED_OUT; 1244 untimeout(ahc_timeout, 1245 (caddr_t)outscb); 1246 ahc_done(ahc, outscb); 1247 goto pagein_done; 1248 } 1249 } 1250 disc_scb = AHC_INB(ahc, DISCONNECTED_SCBH); 1251 if (disc_scb != SCB_LIST_NULL) { 1252 AHC_OUTB(ahc, SCBPTR, disc_scb); 1253 tag = AHC_INB(ahc, SCB_TAG); 1254 outscb = ahc->scbarray[tag]; 1255 next = AHC_INB(ahc, SCB_NEXT); 1256 if (next != SCB_LIST_NULL) { 1257 AHC_OUTB(ahc, SCBPTR, next); 1258 AHC_OUTB(ahc, SCB_PREV, 1259 SCB_LIST_NULL); 1260 AHC_OUTB(ahc, SCBPTR, disc_scb); 1261 } 1262 AHC_OUTB(ahc, DISCONNECTED_SCBH, next); 1263 ahc_page_scb(ahc, outscb, scb); 1264 } else if (AHC_INB(ahc, QINCNT) & ahc->qcntmask) { 1265 /* 1266 * Pull one of our queued commands 1267 * as a last resort 1268 */ 1269 disc_scb = AHC_INB(ahc, QINFIFO); 1270 AHC_OUTB(ahc, SCBPTR, disc_scb); 1271 tag = AHC_INB(ahc, SCB_TAG); 1272 outscb = ahc->scbarray[tag]; 1273 if ((outscb->control & 0x23) != TAG_ENB) { 1274 /* 1275 * This is not a simple tagged command 1276 * so its position in the queue 1277 * matters. Take the command at the 1278 * end of the queue instead. 1279 */ 1280 int i; 1281 u_char saved_queue[AHC_SCB_MAX]; 1282 u_char queued = AHC_INB(ahc, QINCNT) 1283 & ahc->qcntmask; 1284 1285 /* 1286 * Count the command we removed 1287 * already 1288 */ 1289 saved_queue[0] = disc_scb; 1290 queued++; 1291 1292 /* Empty the input queue */ 1293 for (i = 1; i < queued; i++) 1294 saved_queue[i] = AHC_INB(ahc, QINFIFO); 1295 1296 /* 1297 * Put everyone back but the 1298 * last entry 1299 */ 1300 queued--; 1301 for (i = 0; i < queued; i++) 1302 AHC_OUTB(ahc, QINFIFO, 1303 saved_queue[i]); 1304 1305 AHC_OUTB(ahc, SCBPTR, 1306 saved_queue[queued]); 1307 tag = AHC_INB(ahc, SCB_TAG); 1308 outscb = ahc->scbarray[tag]; 1309 } 1310 untimeout(ahc_timeout, (caddr_t)outscb); 1311 scb->position = outscb->position; 1312 outscb->position = SCB_LIST_NULL; 1313 STAILQ_INSERT_HEAD(&ahc->waiting_scbs, 1314 outscb, links); 1315 outscb->flags |= SCB_WAITINGQ; 1316 ahc_send_scb(ahc, scb); 1317 scb->flags &= ~SCB_PAGED_OUT; 1318 } 1319 else { 1320 panic("Page-in request with no candidates"); 1321 AHC_OUTB(ahc, RETURN_1, 0); 1322 } 1323 pagein_done: 1324 } else { 1325 printf("%s:%c:%d: no active SCB for reconnecting " 1326 "target - issuing ABORT\n", 1327 ahc_name(ahc), channel, target); 1328 printf("SAVED_TCL == 0x%x\n", 1329 AHC_INB(ahc, SAVED_TCL)); 1330 ahc_unbusy_target(ahc, target, channel); 1331 AHC_OUTB(ahc, SCB_CONTROL, 0); 1332 AHC_OUTB(ahc, CLRSINT1, CLRSELTIMEO); 1333 AHC_OUTB(ahc, RETURN_1, 0); 1334 } 1335 break; 1336 case SEND_REJECT: 1337 { 1338 u_char rejbyte = AHC_INB(ahc, REJBYTE); 1339 printf("%s:%c:%d: Warning - unknown message received from " 1340 "target (0x%x). Rejecting\n", 1341 ahc_name(ahc), channel, target, rejbyte); 1342 break; 1343 } 1344 case NO_IDENT: 1345 panic("%s:%c:%d: Target did not send an IDENTIFY message. " 1346 "SAVED_TCL == 0x%x\n", 1347 ahc_name(ahc), channel, target, 1348 AHC_INB(ahc, SAVED_TCL)); 1349 break; 1350 case BAD_PHASE: 1351 printf("%s:%c:%d: unknown scsi bus phase. Attempting to " 1352 "continue\n", ahc_name(ahc), channel, target); 1353 break; 1354 case EXTENDED_MSG: 1355 { 1356 u_int8_t message_length; 1357 u_int8_t message_code; 1358 1359 message_length = AHC_INB(ahc, MSGIN_EXT_LEN); 1360 message_code = AHC_INB(ahc, MSGIN_EXT_OPCODE); 1361 switch(message_code) { 1362 case MSG_EXT_SDTR: 1363 { 1364 u_int8_t period; 1365 u_int8_t offset; 1366 u_int8_t saved_offset; 1367 u_int8_t targ_scratch; 1368 u_int8_t maxoffset; 1369 u_int8_t rate; 1370 1371 if (message_length != MSG_EXT_SDTR_LEN) { 1372 AHC_OUTB(ahc, RETURN_1, SEND_REJ); 1373 ahc->sdtrpending &= ~targ_mask; 1374 break; 1375 } 1376 period = AHC_INB(ahc, MSGIN_EXT_BYTE0); 1377 saved_offset = AHC_INB(ahc, MSGIN_EXT_BYTE1); 1378 targ_scratch = AHC_INB(ahc, TARG_SCRATCH 1379 + scratch_offset); 1380 if (targ_scratch & WIDEXFER) 1381 maxoffset = MAX_OFFSET_16BIT; 1382 else 1383 maxoffset = MAX_OFFSET_8BIT; 1384 offset = MIN(saved_offset, maxoffset); 1385 ahc_scsirate(ahc, &rate, &period, &offset, 1386 channel, target); 1387 /* Preserve the WideXfer flag */ 1388 targ_scratch = rate | (targ_scratch & WIDEXFER); 1389 1390 /* 1391 * Update both the target scratch area and the 1392 * current SCSIRATE. 1393 */ 1394 AHC_OUTB(ahc, TARG_SCRATCH + scratch_offset, 1395 targ_scratch); 1396 AHC_OUTB(ahc, SCSIRATE, targ_scratch); 1397 1398 /* 1399 * See if we initiated Sync Negotiation 1400 * and didn't have to fall down to async 1401 * transfers. 1402 */ 1403 if ((ahc->sdtrpending & targ_mask) != 0 1404 && (saved_offset == offset)) { 1405 /* 1406 * Don't send an SDTR back to 1407 * the target 1408 */ 1409 AHC_OUTB(ahc, RETURN_1, 0); 1410 ahc->needsdtr &= ~targ_mask; 1411 ahc->sdtrpending &= ~targ_mask; 1412 } else { 1413 /* 1414 * Send our own SDTR in reply 1415 */ 1416 #ifdef AHC_DEBUG 1417 if(ahc_debug & AHC_SHOWMISC) 1418 printf("Sending SDTR!!\n"); 1419 #endif 1420 ahc_construct_sdtr(ahc, /*start_byte*/0, 1421 period, offset); 1422 AHC_OUTB(ahc, RETURN_1, SEND_MSG); 1423 1424 /* 1425 * If we aren't starting a re-negotiation 1426 * because we had to go async in response 1427 * to a "too low" response from the target 1428 * clear the needsdtr flag for this target. 1429 */ 1430 if ((ahc->sdtrpending & targ_mask) == 0) 1431 ahc->needsdtr &= ~targ_mask; 1432 else 1433 ahc->sdtrpending |= targ_mask; 1434 } 1435 break; 1436 } 1437 case MSG_EXT_WDTR: 1438 { 1439 u_int8_t scratch, bus_width; 1440 1441 if (message_length != MSG_EXT_WDTR_LEN) { 1442 AHC_OUTB(ahc, RETURN_1, SEND_REJ); 1443 ahc->wdtrpending &= ~targ_mask; 1444 break; 1445 } 1446 1447 bus_width = AHC_INB(ahc, MSGIN_EXT_BYTE0); 1448 scratch = AHC_INB(ahc, TARG_SCRATCH 1449 + scratch_offset); 1450 1451 if (ahc->wdtrpending & targ_mask) { 1452 /* 1453 * Don't send a WDTR back to the 1454 * target, since we asked first. 1455 */ 1456 AHC_OUTB(ahc, RETURN_1, 0); 1457 switch(bus_width){ 1458 case BUS_8_BIT: 1459 scratch &= 0x7f; 1460 break; 1461 case BUS_16_BIT: 1462 if(bootverbose) 1463 printf("%s: target %d using " 1464 "16Bit transfers\n", 1465 ahc_name(ahc), target); 1466 scratch |= WIDEXFER; 1467 break; 1468 case BUS_32_BIT: 1469 /* 1470 * How can we do 32bit transfers 1471 * on a 16bit bus? 1472 */ 1473 AHC_OUTB(ahc, RETURN_1, SEND_REJ); 1474 printf("%s: target %d requested 32Bit " 1475 "transfers. Rejecting...\n", 1476 ahc_name(ahc), target); 1477 break; 1478 default: 1479 break; 1480 } 1481 } else { 1482 /* 1483 * Send our own WDTR in reply 1484 */ 1485 switch(bus_width) { 1486 case BUS_8_BIT: 1487 scratch &= 0x7f; 1488 break; 1489 case BUS_32_BIT: 1490 case BUS_16_BIT: 1491 if(ahc->type & AHC_WIDE) { 1492 /* Negotiate 16_BITS */ 1493 bus_width = BUS_16_BIT; 1494 if(bootverbose) 1495 printf("%s: target %d " 1496 "using 16Bit " 1497 "transfers\n", 1498 ahc_name(ahc), 1499 target); 1500 scratch |= WIDEXFER; 1501 } else 1502 bus_width = BUS_8_BIT; 1503 break; 1504 default: 1505 break; 1506 } 1507 ahc_construct_wdtr(ahc, /*start_byte*/0, 1508 bus_width); 1509 AHC_OUTB(ahc, RETURN_1, SEND_MSG); 1510 } 1511 1512 ahc->needwdtr &= ~targ_mask; 1513 ahc->wdtrpending &= ~targ_mask; 1514 AHC_OUTB(ahc, TARG_SCRATCH + scratch_offset, scratch); 1515 AHC_OUTB(ahc, SCSIRATE, scratch); 1516 break; 1517 } 1518 default: 1519 /* Unknown extended message. Reject it. */ 1520 AHC_OUTB(ahc, RETURN_1, SEND_REJ); 1521 } 1522 } 1523 case REJECT_MSG: 1524 { 1525 /* 1526 * What we care about here is if we had an 1527 * outstanding SDTR or WDTR message for this 1528 * target. If we did, this is a signal that 1529 * the target is refusing negotiation. 1530 */ 1531 1532 u_char targ_scratch; 1533 1534 targ_scratch = AHC_INB(ahc, TARG_SCRATCH 1535 + scratch_offset); 1536 1537 if (ahc->wdtrpending & targ_mask){ 1538 /* note 8bit xfers and clear flag */ 1539 targ_scratch &= 0x7f; 1540 ahc->needwdtr &= ~targ_mask; 1541 ahc->wdtrpending &= ~targ_mask; 1542 printf("%s:%c:%d: refuses WIDE negotiation. Using " 1543 "8bit transfers\n", ahc_name(ahc), 1544 channel, target); 1545 } else if(ahc->sdtrpending & targ_mask){ 1546 /* note asynch xfers and clear flag */ 1547 targ_scratch &= 0xf0; 1548 ahc->needsdtr &= ~targ_mask; 1549 ahc->sdtrpending &= ~targ_mask; 1550 printf("%s:%c:%d: refuses synchronous negotiation. " 1551 "Using asynchronous transfers\n", 1552 ahc_name(ahc), 1553 channel, target); 1554 } else { 1555 /* 1556 * Otherwise, we ignore it. 1557 */ 1558 #ifdef AHC_DEBUG 1559 if(ahc_debug & AHC_SHOWMISC) 1560 printf("%s:%c:%d: Message reject -- ignored\n", 1561 ahc_name(ahc), channel, target); 1562 #endif 1563 break; 1564 } 1565 AHC_OUTB(ahc, TARG_SCRATCH + scratch_offset, targ_scratch); 1566 AHC_OUTB(ahc, SCSIRATE, targ_scratch); 1567 break; 1568 } 1569 case BAD_STATUS: 1570 { 1571 int scb_index; 1572 struct scsi_xfer *xs; 1573 1574 /* The sequencer will notify us when a command 1575 * has an error that would be of interest to 1576 * the kernel. This allows us to leave the sequencer 1577 * running in the common case of command completes 1578 * without error. 1579 */ 1580 1581 scb_index = AHC_INB(ahc, SCB_TAG); 1582 scb = ahc->scbarray[scb_index]; 1583 1584 /* 1585 * Set the default return value to 0 (don't 1586 * send sense). The sense code will change 1587 * this if needed and this reduces code 1588 * duplication. 1589 */ 1590 AHC_OUTB(ahc, RETURN_1, 0); 1591 if (!(scb && (scb->flags & SCB_ACTIVE))) { 1592 printf("%s:%c:%d: ahc_intr - referenced scb " 1593 "not valid during seqint 0x%x scb(%d)\n", 1594 ahc_name(ahc), 1595 channel, target, intstat, 1596 scb_index); 1597 goto clear; 1598 } 1599 1600 xs = scb->xs; 1601 1602 scb->status = AHC_INB(ahc, SCB_TARGET_STATUS); 1603 1604 #ifdef AHC_DEBUG 1605 if((ahc_debug & AHC_SHOWSCBS) 1606 && xs->sc_link->target == DEBUGTARGET) 1607 ahc_print_scb(scb); 1608 #endif 1609 xs->status = scb->status; 1610 switch(scb->status){ 1611 case SCSI_OK: 1612 printf("%s: Interrupted for staus of" 1613 " 0???\n", ahc_name(ahc)); 1614 break; 1615 case SCSI_CHECK: 1616 #ifdef AHC_DEBUG 1617 if(ahc_debug & AHC_SHOWSENSE) 1618 { 1619 1620 sc_print_addr(xs->sc_link); 1621 printf("requests Check Status\n"); 1622 } 1623 #endif 1624 1625 if ((xs->error == XS_NOERROR) 1626 && !(scb->flags & SCB_SENSE)) { 1627 struct ahc_dma_seg *sg = scb->ahc_dma; 1628 struct scsi_sense *sc = &(scb->sense_cmd); 1629 #ifdef AHC_DEBUG 1630 if (ahc_debug & AHC_SHOWSENSE) 1631 { 1632 sc_print_addr(xs->sc_link); 1633 printf("Sending Sense\n"); 1634 } 1635 #endif 1636 #if defined(__FreeBSD__) 1637 sc->op_code = REQUEST_SENSE; 1638 #elif defined(__NetBSD__) 1639 sc->opcode = REQUEST_SENSE; 1640 #endif 1641 sc->byte2 = xs->sc_link->lun << 5; 1642 sc->length = sizeof(struct scsi_sense_data); 1643 sc->control = 0; 1644 sg->addr = KVTOPHYS(&xs->sense); 1645 sg->len = sizeof(struct scsi_sense_data); 1646 1647 scb->control &= DISCENB; 1648 scb->status = 0; 1649 scb->SG_segment_count = 1; 1650 scb->SG_list_pointer = KVTOPHYS(sg); 1651 scb->data = sg->addr; 1652 scb->datalen = sg->len; 1653 #ifdef AHC_BROKEN_CACHE 1654 if (ahc_broken_cache) 1655 INVALIDATE_CACHE(); 1656 #endif 1657 scb->cmdpointer = KVTOPHYS(sc); 1658 scb->cmdlen = sizeof(*sc); 1659 1660 scb->flags |= SCB_SENSE; 1661 ahc_send_scb(ahc, scb); 1662 /* 1663 * Ensure that the target is "BUSY" 1664 * so we don't get overlapping 1665 * commands if we happen to be doing 1666 * tagged I/O. 1667 */ 1668 ahc_busy_target(ahc, target, channel); 1669 1670 /* 1671 * Make us the next command to run 1672 */ 1673 ahc_add_waiting_scb(ahc, scb); 1674 AHC_OUTB(ahc, RETURN_1, SEND_SENSE); 1675 break; 1676 } 1677 /* 1678 * Clear the SCB_SENSE Flag and have 1679 * the sequencer do a normal command 1680 * complete with either a "DRIVER_STUFFUP" 1681 * error or whatever other error condition 1682 * we already had. 1683 */ 1684 scb->flags &= ~SCB_SENSE; 1685 if (xs->error == XS_NOERROR) 1686 xs->error = XS_DRIVER_STUFFUP; 1687 break; 1688 case SCSI_BUSY: 1689 xs->error = XS_BUSY; 1690 sc_print_addr(xs->sc_link); 1691 printf("Target Busy\n"); 1692 break; 1693 case SCSI_QUEUE_FULL: 1694 /* 1695 * The upper level SCSI code will someday 1696 * handle this properly. 1697 */ 1698 sc_print_addr(xs->sc_link); 1699 printf("Queue Full\n"); 1700 scb->flags |= SCB_ASSIGNEDQ; 1701 STAILQ_INSERT_TAIL(&ahc->assigned_scbs,scb, links); 1702 AHC_OUTB(ahc, RETURN_1, SEND_SENSE); 1703 break; 1704 default: 1705 sc_print_addr(xs->sc_link); 1706 printf("unexpected targ_status: %x\n", scb->status); 1707 xs->error = XS_DRIVER_STUFFUP; 1708 break; 1709 } 1710 break; 1711 } 1712 case RESIDUAL: 1713 { 1714 int scb_index; 1715 struct scsi_xfer *xs; 1716 1717 scb_index = AHC_INB(ahc, SCB_TAG); 1718 scb = ahc->scbarray[scb_index]; 1719 xs = scb->xs; 1720 /* 1721 * Don't clobber valid resid info with 1722 * a resid coming from a check sense 1723 * operation. 1724 */ 1725 if (!(scb->flags & SCB_SENSE)) { 1726 int resid_sgs; 1727 1728 /* 1729 * Remainder of the SG where the transfer 1730 * stopped. 1731 */ 1732 xs->resid = (AHC_INB(ahc, SCB_RESID_DCNT2)<<16) | 1733 (AHC_INB(ahc, SCB_RESID_DCNT1)<<8) | 1734 AHC_INB(ahc, SCB_RESID_DCNT0); 1735 1736 /* 1737 * Add up the contents of all residual 1738 * SG segments that are after the SG where 1739 * the transfer stopped. 1740 */ 1741 resid_sgs = AHC_INB(ahc, SCB_RESID_SGCNT) - 1; 1742 while (resid_sgs > 0) { 1743 int sg; 1744 1745 sg = scb->SG_segment_count - resid_sgs; 1746 xs->resid += scb->ahc_dma[sg].len; 1747 resid_sgs--; 1748 } 1749 1750 #if defined(__FreeBSD__) 1751 xs->flags |= SCSI_RESID_VALID; 1752 #elif defined(__NetBSD__) 1753 /* XXX - Update to do this right */ 1754 #endif 1755 #ifdef AHC_DEBUG 1756 if (ahc_debug & AHC_SHOWMISC) { 1757 sc_print_addr(xs->sc_link); 1758 printf("Handled Residual of %ld bytes\n" 1759 ,xs->resid); 1760 } 1761 #endif 1762 } 1763 break; 1764 } 1765 case ABORT_TAG: 1766 { 1767 int scb_index; 1768 struct scsi_xfer *xs; 1769 1770 scb_index = AHC_INB(ahc, SCB_TAG); 1771 scb = ahc->scbarray[scb_index]; 1772 xs = scb->xs; 1773 /* 1774 * We didn't recieve a valid tag back from 1775 * the target on a reconnect. 1776 */ 1777 sc_print_addr(xs->sc_link); 1778 printf("invalid tag received -- sending ABORT_TAG\n"); 1779 xs->error = XS_DRIVER_STUFFUP; 1780 untimeout(ahc_timeout, (caddr_t)scb); 1781 ahc_done(ahc, scb); 1782 break; 1783 } 1784 case AWAITING_MSG: 1785 { 1786 int scb_index; 1787 scb_index = AHC_INB(ahc, SCB_TAG); 1788 scb = ahc->scbarray[scb_index]; 1789 /* 1790 * This SCB had a zero length command, informing 1791 * the sequencer that we wanted to send a special 1792 * message to this target. We only do this for 1793 * BUS_DEVICE_RESET messages currently. 1794 */ 1795 if (scb->flags & SCB_DEVICE_RESET) { 1796 AHC_OUTB(ahc, MSG0, 1797 MSG_BUS_DEV_RESET); 1798 AHC_OUTB(ahc, MSG_LEN, 1); 1799 printf("Bus Device Reset Message Sent\n"); 1800 } else if (scb->flags & SCB_MSGOUT_WDTR) { 1801 ahc_construct_wdtr(ahc, AHC_INB(ahc, MSG_LEN), 1802 BUS_16_BIT); 1803 } else if (scb->flags & SCB_MSGOUT_SDTR) { 1804 u_int8_t target_scratch; 1805 u_int8_t ultraenable; 1806 int sxfr; 1807 int i; 1808 1809 /* Pull the user defined setting */ 1810 target_scratch = AHC_INB(ahc, TARG_SCRATCH 1811 + scratch_offset); 1812 1813 sxfr = target_scratch & SXFR; 1814 if (scratch_offset < 8) 1815 ultraenable = AHC_INB(ahc, ULTRA_ENB); 1816 else 1817 ultraenable = AHC_INB(ahc, ULTRA_ENB + 1); 1818 1819 if (ultraenable & targ_mask) 1820 /* Want an ultra speed in the table */ 1821 sxfr |= 0x100; 1822 1823 for (i = 0; i < ahc_num_syncrates; i++) 1824 if (sxfr == ahc_syncrates[i].sxfr) 1825 break; 1826 1827 ahc_construct_sdtr(ahc, AHC_INB(ahc, MSG_LEN), 1828 ahc_syncrates[i].period, 1829 target_scratch & WIDEXFER ? 1830 MAX_OFFSET_16BIT : MAX_OFFSET_8BIT); 1831 } else 1832 panic("ahc_intr: AWAITING_MSG for an SCB that " 1833 "does not have a waiting message"); 1834 break; 1835 } 1836 case IMMEDDONE: 1837 { 1838 /* 1839 * Take care of device reset messages 1840 */ 1841 u_char scbindex = AHC_INB(ahc, SCB_TAG); 1842 scb = ahc->scbarray[scbindex]; 1843 if (scb->flags & SCB_DEVICE_RESET) { 1844 u_char targ_scratch; 1845 int found; 1846 /* 1847 * Go back to async/narrow transfers and 1848 * renegotiate. 1849 */ 1850 ahc_unbusy_target(ahc, target, channel); 1851 ahc->needsdtr |= ahc->needsdtr_orig & targ_mask; 1852 ahc->needwdtr |= ahc->needwdtr_orig & targ_mask; 1853 ahc->sdtrpending &= ~targ_mask; 1854 ahc->wdtrpending &= ~targ_mask; 1855 targ_scratch = AHC_INB(ahc, TARG_SCRATCH 1856 + scratch_offset); 1857 targ_scratch &= SXFR; 1858 AHC_OUTB(ahc, TARG_SCRATCH + scratch_offset, 1859 targ_scratch); 1860 found = ahc_reset_device(ahc, target, 1861 channel, SCB_LIST_NULL, 1862 XS_NOERROR); 1863 sc_print_addr(scb->xs->sc_link); 1864 printf("Bus Device Reset delivered. " 1865 "%d SCBs aborted\n", found); 1866 ahc->in_timeout = FALSE; 1867 ahc_run_done_queue(ahc); 1868 } else 1869 panic("ahc_intr: Immediate complete for " 1870 "unknown operation."); 1871 break; 1872 } 1873 case DATA_OVERRUN: 1874 { 1875 /* 1876 * When the sequencer detects an overrun, it 1877 * sets STCNT to 0x00ffffff and allows the 1878 * target to complete its transfer in 1879 * BITBUCKET mode. 1880 */ 1881 u_char scbindex = AHC_INB(ahc, SCB_TAG); 1882 u_int32_t overrun; 1883 scb = ahc->scbarray[scbindex]; 1884 overrun = AHC_INB(ahc, STCNT0) 1885 | (AHC_INB(ahc, STCNT1) << 8) 1886 | (AHC_INB(ahc, STCNT2) << 16); 1887 overrun = 0x00ffffff - overrun; 1888 sc_print_addr(scb->xs->sc_link); 1889 printf("data overrun of %d bytes detected." 1890 " Forcing a retry.\n", overrun); 1891 /* 1892 * Set this and it will take affect when the 1893 * target does a command complete. 1894 */ 1895 scb->xs->error = XS_DRIVER_STUFFUP; 1896 break; 1897 } 1898 #if NOT_YET 1899 /* XXX Fill these in later */ 1900 case MESG_BUFFER_BUSY: 1901 break; 1902 case MSGIN_PHASEMIS: 1903 break; 1904 #endif 1905 default: 1906 printf("ahc_intr: seqint, " 1907 "intstat == 0x%x, scsisigi = 0x%x\n", 1908 intstat, AHC_INB(ahc, SCSISIGI)); 1909 break; 1910 } 1911 1912 clear: 1913 /* 1914 * Clear the upper byte that holds SEQINT status 1915 * codes and clear the SEQINT bit. 1916 */ 1917 AHC_OUTB(ahc, CLRINT, CLRSEQINT); 1918 1919 /* 1920 * The sequencer is paused immediately on 1921 * a SEQINT, so we should restart it when 1922 * we're done. 1923 */ 1924 unpause_sequencer(ahc, /*unpause_always*/TRUE); 1925 } 1926 1927 /* 1928 * We have a scb which has been processed by the 1929 * adaptor, now we look to see how the operation 1930 * went. 1931 */ 1932 static void 1933 ahc_done(ahc, scb) 1934 struct ahc_data *ahc; 1935 struct scb *scb; 1936 { 1937 struct scsi_xfer *xs = scb->xs; 1938 1939 SC_DEBUG(xs->sc_link, SDEV_DB2, ("ahc_done\n")); 1940 /* 1941 * Put the results of the operation 1942 * into the xfer and call whoever started it 1943 */ 1944 #if defined(__NetBSD__) 1945 if (xs->error != XS_NOERROR) { 1946 /* Don't override the error value. */ 1947 } else if (scb->flags & SCB_ABORTED) { 1948 xs->error = XS_DRIVER_STUFFUP; 1949 } else 1950 #endif 1951 if(scb->flags & SCB_SENSE) 1952 xs->error = XS_SENSE; 1953 if(scb->flags & SCB_SENTORDEREDTAG) 1954 ahc->in_timeout = FALSE; 1955 #if defined(__FreeBSD__) 1956 if ((xs->flags & SCSI_ERR_OK) && !(xs->error == XS_SENSE)) { 1957 /* All went correctly OR errors expected */ 1958 xs->error = XS_NOERROR; 1959 } 1960 #elif defined(__NetBSD__) 1961 /* 1962 * Since NetBSD doesn't have error ignoring operation mode 1963 * (SCSI_ERR_OK in FreeBSD), we don't have to care this case. 1964 */ 1965 #endif 1966 xs->flags |= ITSDONE; 1967 #ifdef AHC_TAGENABLE 1968 if(xs->cmd->opcode == INQUIRY && xs->error == XS_NOERROR) 1969 { 1970 struct scsi_inquiry_data *inq_data; 1971 u_short mask = 0x01 << (xs->sc_link->target | 1972 (scb->tcl & 0x08)); 1973 /* 1974 * Sneak a look at the results of the SCSI Inquiry 1975 * command and see if we can do Tagged queing. This 1976 * should really be done by the higher level drivers. 1977 */ 1978 inq_data = (struct scsi_inquiry_data *)xs->data; 1979 if((inq_data->flags & SID_CmdQue) && !(ahc->tagenable & mask)) 1980 { 1981 printf("%s: target %d Tagged Queuing Device\n", 1982 ahc_name(ahc), xs->sc_link->target); 1983 ahc->tagenable |= mask; 1984 if(ahc->maxhscbs >= 16 || (ahc->flags & AHC_PAGESCBS)) { 1985 /* Default to 8 tags */ 1986 xs->sc_link->opennings += 6; 1987 } 1988 else 1989 { 1990 /* 1991 * Default to 4 tags on whimpy 1992 * cards that don't have much SCB 1993 * space and can't page. This prevents 1994 * a single device from hogging all 1995 * slots. We should really have a better 1996 * way of providing fairness. 1997 */ 1998 xs->sc_link->opennings += 2; 1999 } 2000 } 2001 } 2002 #endif 2003 ahc_free_scb(ahc, scb, xs->flags); 2004 scsi_done(xs); 2005 2006 #if defined(__NetBSD__) /* XXX */ 2007 /* 2008 * If there are entries in the software queue, try to 2009 * run the first one. We should be more or less guaranteed 2010 * to succeed, since we just freed an SCB. 2011 * 2012 * NOTE: ahc_scsi_cmd() relies on our calling it with 2013 * the first entry in the queue. 2014 */ 2015 if (ahc->sc_xxxq.lh_first != NULL) 2016 (void) ahc_scsi_cmd(ahc->sc_xxxq.lh_first); 2017 #endif /* __NetBSD__ */ 2018 } 2019 2020 /* 2021 * Start the board, ready for normal operation 2022 */ 2023 int 2024 ahc_init(ahc) 2025 struct ahc_data *ahc; 2026 { 2027 u_int8_t scsi_conf, sblkctl, i; 2028 u_int16_t ultraenable = 0; 2029 int max_targ = 15; 2030 /* 2031 * Assume we have a board at this stage and it has been reset. 2032 */ 2033 2034 /* Handle the SCBPAGING option */ 2035 #ifndef AHC_SCBPAGING_ENABLE 2036 ahc->flags &= ~AHC_PAGESCBS; 2037 #endif 2038 2039 /* Determine channel configuration and who we are on the scsi bus. */ 2040 switch ( (sblkctl = AHC_INB(ahc, SBLKCTL) & 0x0a) ) { 2041 case 0: 2042 ahc->our_id = (AHC_INB(ahc, SCSICONF) & HSCSIID); 2043 ahc->flags &= ~AHC_CHANNEL_B_PRIMARY; 2044 if(ahc->type == AHC_394) 2045 printf("Channel %c, SCSI Id=%d, ", 2046 ahc->flags & AHC_CHNLB ? 'B' : 'A', 2047 ahc->our_id); 2048 else 2049 printf("Single Channel, SCSI Id=%d, ", ahc->our_id); 2050 AHC_OUTB(ahc, FLAGS, SINGLE_BUS | (ahc->flags & AHC_PAGESCBS)); 2051 break; 2052 case 2: 2053 ahc->our_id = (AHC_INB(ahc, SCSICONF + 1) & HWSCSIID); 2054 ahc->flags &= ~AHC_CHANNEL_B_PRIMARY; 2055 if(ahc->type == AHC_394) 2056 printf("Wide Channel %c, SCSI Id=%d, ", 2057 ahc->flags & AHC_CHNLB ? 'B' : 'A', 2058 ahc->our_id); 2059 else 2060 printf("Wide Channel, SCSI Id=%d, ", ahc->our_id); 2061 ahc->type |= AHC_WIDE; 2062 AHC_OUTB(ahc, FLAGS, WIDE_BUS | (ahc->flags & AHC_PAGESCBS)); 2063 break; 2064 case 8: 2065 ahc->our_id = (AHC_INB(ahc, SCSICONF) & HSCSIID); 2066 ahc->our_id_b = (AHC_INB(ahc, SCSICONF + 1) & HSCSIID); 2067 printf("Twin Channel, A SCSI Id=%d, B SCSI Id=%d, ", 2068 ahc->our_id, ahc->our_id_b); 2069 ahc->type |= AHC_TWIN; 2070 AHC_OUTB(ahc, FLAGS, TWIN_BUS | (ahc->flags & AHC_PAGESCBS)); 2071 break; 2072 default: 2073 printf(" Unsupported adapter type. Ignoring\n"); 2074 return(-1); 2075 } 2076 2077 /* Determine the number of SCBs */ 2078 2079 { 2080 AHC_OUTB(ahc, SCBPTR, 0); 2081 AHC_OUTB(ahc, SCB_CONTROL, 0); 2082 for(i = 1; i < AHC_SCB_MAX; i++) { 2083 AHC_OUTB(ahc, SCBPTR, i); 2084 AHC_OUTB(ahc, SCB_CONTROL, i); 2085 if(AHC_INB(ahc, SCB_CONTROL) != i) 2086 break; 2087 AHC_OUTB(ahc, SCBPTR, 0); 2088 if(AHC_INB(ahc, SCB_CONTROL) != 0) 2089 break; 2090 /* Clear the control byte. */ 2091 AHC_OUTB(ahc, SCBPTR, i); 2092 AHC_OUTB(ahc, SCB_CONTROL, 0); 2093 2094 ahc->qcntmask |= i; /* Update the count mask. */ 2095 } 2096 2097 /* Ensure we clear the 0 SCB's control byte. */ 2098 AHC_OUTB(ahc, SCBPTR, 0); 2099 AHC_OUTB(ahc, SCB_CONTROL, 0); 2100 2101 ahc->qcntmask |= i; 2102 ahc->maxhscbs = i; 2103 } 2104 2105 if((ahc->maxhscbs < AHC_SCB_MAX) && (ahc->flags & AHC_PAGESCBS)) 2106 ahc->maxscbs = AHC_SCB_MAX; 2107 else { 2108 ahc->maxscbs = ahc->maxhscbs; 2109 ahc->flags &= ~AHC_PAGESCBS; 2110 } 2111 2112 printf("%d SCBs\n", ahc->maxhscbs); 2113 2114 #ifdef AHC_DEBUG 2115 if(ahc_debug & AHC_SHOWMISC) { 2116 struct scb test; 2117 printf("%s: hardware scb %ld bytes; kernel scb; " 2118 "ahc_dma %d bytes\n", 2119 ahc_name(ahc), 2120 (u_long)&(test.next) - (u_long)(&test), 2121 sizeof(test), 2122 sizeof(struct ahc_dma_seg)); 2123 } 2124 #endif /* AHC_DEBUG */ 2125 2126 /* Set the SCSI Id, SXFRCTL0, SXFRCTL1, and SIMODE1, for both channels*/ 2127 if(ahc->type & AHC_TWIN) 2128 { 2129 /* 2130 * The device is gated to channel B after a chip reset, 2131 * so set those values first 2132 */ 2133 AHC_OUTB(ahc, SCSIID, ahc->our_id_b); 2134 scsi_conf = AHC_INB(ahc, SCSICONF + 1); 2135 AHC_OUTB(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL)) 2136 | ENSTIMER|ACTNEGEN|STPWEN); 2137 AHC_OUTB(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR); 2138 if(ahc->type & AHC_ULTRA) 2139 AHC_OUTB(ahc, SXFRCTL0, DFON|SPIOEN|ULTRAEN); 2140 else 2141 AHC_OUTB(ahc, SXFRCTL0, DFON|SPIOEN); 2142 2143 if(scsi_conf & RESET_SCSI) { 2144 /* Reset the bus */ 2145 #if !defined(__NetBSD__) || (defined(__NetBSD__) && defined(DEBUG)) 2146 if(bootverbose) 2147 printf("%s: Resetting Channel B\n", 2148 ahc_name(ahc)); 2149 #endif 2150 AHC_OUTB(ahc, SCSISEQ, SCSIRSTO); 2151 DELAY(1000); 2152 AHC_OUTB(ahc, SCSISEQ, 0); 2153 2154 /* Ensure we don't get a RSTI interrupt from this */ 2155 AHC_OUTB(ahc, CLRSINT1, CLRSCSIRSTI); 2156 AHC_OUTB(ahc, CLRINT, CLRSCSIINT); 2157 } 2158 2159 /* Select Channel A */ 2160 AHC_OUTB(ahc, SBLKCTL, 0); 2161 } 2162 AHC_OUTB(ahc, SCSIID, ahc->our_id); 2163 scsi_conf = AHC_INB(ahc, SCSICONF); 2164 AHC_OUTB(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL)) 2165 | ENSTIMER|ACTNEGEN|STPWEN); 2166 AHC_OUTB(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR); 2167 if(ahc->type & AHC_ULTRA) 2168 AHC_OUTB(ahc, SXFRCTL0, DFON|SPIOEN|ULTRAEN); 2169 else 2170 AHC_OUTB(ahc, SXFRCTL0, DFON|SPIOEN); 2171 2172 if(scsi_conf & RESET_SCSI) { 2173 /* Reset the bus */ 2174 #if !defined(__NetBSD__) || (defined(__NetBSD__) && defined(DEBUG)) 2175 if(bootverbose) 2176 printf("%s: Resetting Channel A\n", ahc_name(ahc)); 2177 #endif 2178 2179 AHC_OUTB(ahc, SCSISEQ, SCSIRSTO); 2180 DELAY(1000); 2181 AHC_OUTB(ahc, SCSISEQ, 0); 2182 2183 /* Ensure we don't get a RSTI interrupt from this */ 2184 AHC_OUTB(ahc, CLRSINT1, CLRSCSIRSTI); 2185 AHC_OUTB(ahc, CLRINT, CLRSCSIINT); 2186 } 2187 2188 /* 2189 * Look at the information that board initialization or 2190 * the board bios has left us. In the lower four bits of each 2191 * target's scratch space any value other than 0 indicates 2192 * that we should initiate synchronous transfers. If it's zero, 2193 * the user or the BIOS has decided to disable synchronous 2194 * negotiation to that target so we don't activate the needsdtr 2195 * flag. 2196 */ 2197 ahc->needsdtr_orig = 0; 2198 ahc->needwdtr_orig = 0; 2199 2200 /* Grab the disconnection disable table and invert it for our needs */ 2201 if(ahc->flags & AHC_USEDEFAULTS) { 2202 printf("%s: Host Adapter Bios disabled. Using default SCSI " 2203 "device parameters\n", ahc_name(ahc)); 2204 ahc->discenable = 0xff; 2205 } 2206 else 2207 ahc->discenable = ~((AHC_INB(ahc, DISC_DSB + 1) << 8) 2208 | AHC_INB(ahc, DISC_DSB)); 2209 2210 if(!(ahc->type & (AHC_WIDE|AHC_TWIN))) 2211 max_targ = 7; 2212 2213 for(i = 0; i <= max_targ; i++){ 2214 u_char target_settings; 2215 if (ahc->flags & AHC_USEDEFAULTS) { 2216 target_settings = 0; /* 10MHz */ 2217 ahc->needsdtr_orig |= (0x01 << i); 2218 ahc->needwdtr_orig |= (0x01 << i); 2219 } 2220 else { 2221 /* Take the settings leftover in scratch RAM. */ 2222 target_settings = AHC_INB(ahc, TARG_SCRATCH + i); 2223 2224 if(target_settings & 0x0f){ 2225 ahc->needsdtr_orig |= (0x01 << i); 2226 /*Default to asynchronous transfers(0 offset)*/ 2227 target_settings &= 0xf0; 2228 } 2229 if(target_settings & 0x80){ 2230 ahc->needwdtr_orig |= (0x01 << i); 2231 /* 2232 * We'll set the Wide flag when we 2233 * are successful with Wide negotiation. 2234 * Turn it off for now so we aren't 2235 * confused. 2236 */ 2237 target_settings &= 0x7f; 2238 } 2239 if(ahc->type & AHC_ULTRA) { 2240 /* 2241 * Enable Ultra for any target that 2242 * has a valid ultra syncrate setting. 2243 */ 2244 u_char rate = target_settings & 0x70; 2245 if(rate == 0x00 || rate == 0x10 || 2246 rate == 0x20 || rate == 0x40) { 2247 if(rate == 0x40) { 2248 /* Treat 10MHz specially */ 2249 target_settings &= ~0x70; 2250 } 2251 else 2252 ultraenable |= (0x01 << i); 2253 } 2254 } 2255 } 2256 AHC_OUTB(ahc, TARG_SCRATCH+i,target_settings); 2257 } 2258 /* 2259 * If we are not a WIDE device, forget WDTR. This 2260 * makes the driver work on some cards that don't 2261 * leave these fields cleared when the BIOS is not 2262 * installed. 2263 */ 2264 if(!(ahc->type & AHC_WIDE)) 2265 ahc->needwdtr_orig = 0; 2266 ahc->needsdtr = ahc->needsdtr_orig; 2267 ahc->needwdtr = ahc->needwdtr_orig; 2268 ahc->sdtrpending = 0; 2269 ahc->wdtrpending = 0; 2270 ahc->tagenable = 0; 2271 ahc->orderedtag = 0; 2272 2273 AHC_OUTB(ahc, ULTRA_ENB, ultraenable & 0xff); 2274 AHC_OUTB(ahc, ULTRA_ENB + 1, (ultraenable >> 8) & 0xff); 2275 2276 #ifdef AHC_DEBUG 2277 /* How did we do? */ 2278 if(ahc_debug & AHC_SHOWMISC) 2279 printf("NEEDSDTR == 0x%x\nNEEDWDTR == 0x%x\n" 2280 "DISCENABLE == 0x%x\n", ahc->needsdtr, 2281 ahc->needwdtr, ahc->discenable); 2282 #endif 2283 /* 2284 * Set the number of available SCBs 2285 */ 2286 AHC_OUTB(ahc, SCBCOUNT, ahc->maxhscbs); 2287 2288 /* 2289 * 2's compliment of maximum tag value 2290 */ 2291 i = ahc->maxscbs; 2292 AHC_OUTB(ahc, COMP_SCBCOUNT, -i & 0xff); 2293 2294 /* 2295 * QCount mask to deal with broken aic7850s that 2296 * sporadically get garbage in the upper bits of 2297 * their QCount registers. 2298 */ 2299 AHC_OUTB(ahc, QCNTMASK, ahc->qcntmask); 2300 2301 /* We don't have any busy targets right now */ 2302 AHC_OUTB(ahc, ACTIVE_A, 0); 2303 AHC_OUTB(ahc, ACTIVE_B, 0); 2304 2305 /* We don't have any waiting selections */ 2306 AHC_OUTB(ahc, WAITING_SCBH, SCB_LIST_NULL); 2307 2308 /* Our disconnection list is empty too */ 2309 AHC_OUTB(ahc, DISCONNECTED_SCBH, SCB_LIST_NULL); 2310 2311 /* Message out buffer starts empty */ 2312 AHC_OUTB(ahc, MSG_LEN, 0x00); 2313 2314 /* 2315 * Load the Sequencer program and Enable the adapter 2316 * in "fast" mode. 2317 */ 2318 #if !defined(__NetBSD__) || (defined(__NetBSD__) && defined(DEBUG)) 2319 if(bootverbose) 2320 printf("%s: Downloading Sequencer Program...", 2321 ahc_name(ahc)); 2322 #endif 2323 2324 ahc_loadseq(ahc); 2325 2326 #if !defined(__NetBSD__) || (defined(__NetBSD__) && defined(DEBUG)) 2327 if(bootverbose) 2328 printf("Done\n"); 2329 #endif 2330 2331 AHC_OUTB(ahc, SEQCTL, FASTMODE); 2332 2333 unpause_sequencer(ahc, /*unpause_always*/TRUE); 2334 2335 /* 2336 * Note that we are going and return (to probe) 2337 */ 2338 ahc->flags |= AHC_INIT; 2339 return (0); 2340 } 2341 2342 static void 2343 ahcminphys(bp) 2344 struct buf *bp; 2345 { 2346 /* 2347 * Even though the card can transfer up to 16megs per command 2348 * we are limited by the number of segments in the dma segment 2349 * list that we can hold. The worst case is that all pages are 2350 * discontinuous physically, hense the "page per segment" limit 2351 * enforced here. 2352 */ 2353 if (bp->b_bcount > ((AHC_NSEG - 1) * PAGE_SIZE)) { 2354 bp->b_bcount = ((AHC_NSEG - 1) * PAGE_SIZE); 2355 } 2356 #if defined(__NetBSD__) 2357 minphys(bp); 2358 #endif 2359 } 2360 2361 #if defined(__NetBSD__) /* XXX */ 2362 /* 2363 * Insert a scsi_xfer into the software queue. We overload xs->free_list 2364 * to to ensure we don't run into a queue resource shortage, and keep 2365 * a pointer to the last entry around to make insertion O(C). 2366 */ 2367 static void 2368 ahc_xxx_enqueue(ahc, xs, infront) 2369 struct ahc_data *ahc; 2370 struct scsi_xfer *xs; 2371 int infront; 2372 { 2373 2374 if (infront || ahc->sc_xxxq.lh_first == NULL) { 2375 if (ahc->sc_xxxq.lh_first == NULL) 2376 ahc->sc_xxxqlast = xs; 2377 LIST_INSERT_HEAD(&ahc->sc_xxxq, xs, free_list); 2378 return; 2379 } 2380 2381 LIST_INSERT_AFTER(ahc->sc_xxxqlast, xs, free_list); 2382 ahc->sc_xxxqlast = xs; 2383 } 2384 2385 /* 2386 * Pull a scsi_xfer off the front of the software queue. When we 2387 * pull the last one off, we need to clear the pointer to the last 2388 * entry. 2389 */ 2390 static struct scsi_xfer * 2391 ahc_xxx_dequeue(ahc) 2392 struct ahc_data *ahc; 2393 { 2394 struct scsi_xfer *xs; 2395 2396 xs = ahc->sc_xxxq.lh_first; 2397 LIST_REMOVE(xs, free_list); 2398 2399 if (ahc->sc_xxxq.lh_first == NULL) 2400 ahc->sc_xxxqlast = NULL; 2401 2402 return (xs); 2403 } 2404 #endif 2405 2406 /* 2407 * start a scsi operation given the command and 2408 * the data address, target, and lun all of which 2409 * are stored in the scsi_xfer struct 2410 */ 2411 static int32_t 2412 ahc_scsi_cmd(xs) 2413 struct scsi_xfer *xs; 2414 { 2415 struct scb *scb; 2416 struct ahc_dma_seg *sg; 2417 int seg; /* scatter gather seg being worked on */ 2418 unsigned long thiskv, nextkv; 2419 physaddr thisphys, nextphys; 2420 int bytes_this_seg, bytes_this_page, datalen, flags; 2421 struct ahc_data *ahc; 2422 u_short mask; 2423 int s; 2424 #if defined(__NetBSD__) /* XXX */ 2425 int dontqueue = 0, fromqueue = 0; 2426 #endif 2427 2428 ahc = (struct ahc_data *)xs->sc_link->adapter_softc; 2429 mask = (0x01 << (xs->sc_link->target 2430 #if defined(__FreeBSD__) 2431 | ((u_long)xs->sc_link->fordriver & 0x08))); 2432 #elif defined(__NetBSD__) 2433 | (IS_SCSIBUS_B(ahc, xs->sc_link) ? SELBUSB : 0) )); 2434 #endif 2435 2436 SC_DEBUG(xs->sc_link, SDEV_DB2, ("ahc_scsi_cmd\n")); 2437 2438 #if defined(__NetBSD__) /* XXX */ 2439 /* must protect the queue */ 2440 s = splbio(); 2441 2442 /* 2443 * If we're running the queue from ahc_done(), we're called 2444 * with the first entry in the queue as our argument. 2445 * Pull it off; if we can't run the job, it will get placed 2446 * back at the front. 2447 */ 2448 if (xs == ahc->sc_xxxq.lh_first) { 2449 xs = ahc_xxx_dequeue(ahc); 2450 fromqueue = 1; 2451 goto get_scb; 2452 } 2453 2454 /* determine safety of software queueing */ 2455 dontqueue = xs->flags & SCSI_POLL; 2456 2457 /* 2458 * Handle situations where there's already entries in the 2459 * queue. 2460 */ 2461 if (ahc->sc_xxxq.lh_first != NULL) { 2462 /* 2463 * If we can't queue, we have to abort, since 2464 * we have to preserve order. 2465 */ 2466 if (dontqueue) { 2467 splx(s); 2468 xs->error = XS_DRIVER_STUFFUP; 2469 return (TRY_AGAIN_LATER); 2470 } 2471 2472 /* 2473 * Swap with the first queue entry. 2474 */ 2475 ahc_xxx_enqueue(ahc, xs, 0); 2476 xs = ahc_xxx_dequeue(ahc); 2477 fromqueue = 1; 2478 } 2479 2480 get_scb: 2481 #endif /* __NetBSD__ */ 2482 /* 2483 * get an scb to use. If the transfer 2484 * is from a buf (possibly from interrupt time) 2485 * then we can't allow it to sleep 2486 */ 2487 flags = xs->flags; 2488 if (flags & ITSDONE) { 2489 printf("%s: Already done?", ahc_name(ahc)); 2490 xs->flags &= ~ITSDONE; 2491 } 2492 if (!(flags & INUSE)) { 2493 printf("%s: Not in use?", ahc_name(ahc)); 2494 xs->flags |= INUSE; 2495 } 2496 if (!(scb = ahc_get_scb(ahc, flags))) { 2497 #if defined(__NetBSD__) /* XXX */ 2498 /* 2499 * If we can't queue, we lose. 2500 */ 2501 if (dontqueue) { 2502 splx(s); 2503 xs->error = XS_DRIVER_STUFFUP; 2504 return (TRY_AGAIN_LATER); 2505 } 2506 2507 /* 2508 * If we were pulled off the queue, put ourselves 2509 * back in the front, otherwise tack ourselves onto 2510 * the end. 2511 */ 2512 ahc_xxx_enqueue(ahc, xs, fromqueue); 2513 2514 splx(s); 2515 return (SUCCESSFULLY_QUEUED); 2516 #else 2517 xs->error = XS_DRIVER_STUFFUP; 2518 return (TRY_AGAIN_LATER); 2519 #endif /* __NetBSD__ */ 2520 } 2521 2522 #if defined(__NetBSD__) 2523 /* we're done playing with the queue */ 2524 splx(s); 2525 #endif 2526 2527 SC_DEBUG(xs->sc_link, SDEV_DB3, ("start scb(%p)\n", scb)); 2528 scb->xs = xs; 2529 if (flags & SCSI_RESET) { 2530 scb->flags |= SCB_DEVICE_RESET|SCB_IMMED; 2531 scb->control |= MK_MESSAGE; 2532 } 2533 /* 2534 * Put all the arguments for the xfer in the scb 2535 */ 2536 2537 if(ahc->tagenable & mask) { 2538 scb->control |= TAG_ENB; 2539 if(ahc->orderedtag & mask) { 2540 printf("Ordered Tag sent\n"); 2541 scb->control |= 0x02; 2542 ahc->orderedtag &= ~mask; 2543 } 2544 } 2545 if(ahc->discenable & mask) 2546 scb->control |= DISCENB; 2547 if((ahc->needwdtr & mask) && !(ahc->wdtrpending & mask)) 2548 { 2549 scb->control |= MK_MESSAGE; 2550 scb->flags |= SCB_MSGOUT_WDTR; 2551 ahc->wdtrpending |= mask; 2552 } 2553 else if((ahc->needsdtr & mask) && !(ahc->sdtrpending & mask)) 2554 { 2555 scb->control |= MK_MESSAGE; 2556 scb->flags |= SCB_MSGOUT_SDTR; 2557 ahc->sdtrpending |= mask; 2558 } 2559 scb->tcl = ((xs->sc_link->target << 4) & 0xF0) | 2560 #if defined(__FreeBSD__) 2561 ((u_long)xs->sc_link->fordriver & 0x08) | 2562 #elif defined(__NetBSD__) 2563 (IS_SCSIBUS_B(ahc,xs->sc_link)? SELBUSB : 0)| 2564 #endif 2565 (xs->sc_link->lun & 0x07); 2566 scb->cmdlen = xs->cmdlen; 2567 scb->cmdpointer = KVTOPHYS(xs->cmd); 2568 xs->resid = 0; 2569 xs->status = 0; 2570 if (xs->datalen) { /* should use S/G only if not zero length */ 2571 scb->SG_list_pointer = KVTOPHYS(scb->ahc_dma); 2572 sg = scb->ahc_dma; 2573 seg = 0; 2574 /* 2575 * Set up the scatter gather block 2576 */ 2577 SC_DEBUG(xs->sc_link, SDEV_DB4, 2578 ("%ld @%p:- ", xs->datalen, xs->data)); 2579 datalen = xs->datalen; 2580 thiskv = (unsigned long) xs->data; 2581 thisphys = KVTOPHYS(thiskv); 2582 2583 while ((datalen) && (seg < AHC_NSEG)) { 2584 bytes_this_seg = 0; 2585 2586 /* put in the base address */ 2587 sg->addr = thisphys; 2588 2589 SC_DEBUGN(xs->sc_link, SDEV_DB4, ("0x%lx", thisphys)); 2590 2591 /* do it at least once */ 2592 nextphys = thisphys; 2593 while ((datalen) && (thisphys == nextphys)) { 2594 /* 2595 * This page is contiguous (physically) 2596 * with the the last, just extend the 2597 * length 2598 */ 2599 /* how far to the end of the page */ 2600 nextphys = (thisphys & (~(PAGE_SIZE- 1))) 2601 + PAGE_SIZE; 2602 bytes_this_page = nextphys - thisphys; 2603 /**** or the data ****/ 2604 bytes_this_page = min(bytes_this_page, datalen); 2605 bytes_this_seg += bytes_this_page; 2606 datalen -= bytes_this_page; 2607 2608 /* get more ready for the next page */ 2609 nextkv = thiskv; 2610 nextkv &= ~((unsigned long) PAGE_SIZE - 1); 2611 nextkv += PAGE_SIZE; 2612 if (datalen) 2613 thisphys = KVTOPHYS(nextkv); 2614 thiskv = nextkv; 2615 } 2616 /* 2617 * next page isn't contiguous, finish the seg 2618 */ 2619 SC_DEBUGN(xs->sc_link, SDEV_DB4, 2620 ("(0x%x)", bytes_this_seg)); 2621 sg->len = bytes_this_seg; 2622 sg++; 2623 seg++; 2624 } 2625 scb->SG_segment_count = seg; 2626 2627 /* Copy the first SG into the data pointer area */ 2628 scb->data = scb->ahc_dma->addr; 2629 scb->datalen = scb->ahc_dma->len; 2630 SC_DEBUGN(xs->sc_link, SDEV_DB4, ("\n")); 2631 if (datalen) { 2632 /* there's still data, must have run out of segs! */ 2633 printf("%s: ahc_scsi_cmd: more than %d DMA segs\n", 2634 ahc_name(ahc), AHC_NSEG); 2635 xs->error = XS_DRIVER_STUFFUP; 2636 ahc_free_scb(ahc, scb, flags); 2637 return (COMPLETE); 2638 } 2639 #ifdef AHC_BROKEN_CACHE 2640 if (ahc_broken_cache) 2641 INVALIDATE_CACHE(); 2642 #endif 2643 } 2644 else { 2645 /* 2646 * No data xfer, use non S/G values 2647 */ 2648 scb->SG_segment_count = 0; 2649 scb->SG_list_pointer = 0; 2650 scb->data = 0; 2651 scb->datalen = 0; 2652 } 2653 2654 #ifdef AHC_DEBUG 2655 if((ahc_debug & AHC_SHOWSCBS) && (xs->sc_link->target == DEBUGTARG)) 2656 ahc_print_scb(scb); 2657 #endif 2658 s = splbio(); 2659 2660 if( scb->position != SCB_LIST_NULL ) 2661 { 2662 /* We already have a valid slot */ 2663 u_char curscb; 2664 2665 pause_sequencer(ahc); 2666 curscb = AHC_INB(ahc, SCBPTR); 2667 AHC_OUTB(ahc, SCBPTR, scb->position); 2668 ahc_send_scb(ahc, scb); 2669 AHC_OUTB(ahc, SCBPTR, curscb); 2670 AHC_OUTB(ahc, QINFIFO, scb->position); 2671 unpause_sequencer(ahc, /*unpause_always*/FALSE); 2672 scb->flags |= SCB_ACTIVE; 2673 if (!(flags & SCSI_NOMASK)) { 2674 timeout(ahc_timeout, (caddr_t)scb, 2675 (xs->timeout * hz) / 1000); 2676 } 2677 SC_DEBUG(xs->sc_link, SDEV_DB3, ("cmd_sent\n")); 2678 } 2679 else { 2680 scb->flags |= SCB_WAITINGQ; 2681 STAILQ_INSERT_TAIL(&ahc->waiting_scbs, scb, links); 2682 ahc_run_waiting_queues(ahc); 2683 } 2684 if (!(flags & SCSI_NOMASK)) { 2685 splx(s); 2686 return (SUCCESSFULLY_QUEUED); 2687 } 2688 /* 2689 * If we can't use interrupts, poll for completion 2690 */ 2691 SC_DEBUG(xs->sc_link, SDEV_DB3, ("cmd_poll\n")); 2692 do { 2693 if (ahc_poll(ahc, xs->timeout)) { 2694 if (!(xs->flags & SCSI_SILENT)) 2695 printf("cmd fail\n"); 2696 ahc_timeout(scb); 2697 break; 2698 } 2699 } while (!(xs->flags & ITSDONE)); /* a non command complete intr */ 2700 splx(s); 2701 return (COMPLETE); 2702 } 2703 2704 2705 /* 2706 * A scb (and hence an scb entry on the board) is put onto the 2707 * free list. 2708 */ 2709 static void 2710 ahc_free_scb(ahc, scb, flags) 2711 struct ahc_data *ahc; 2712 int flags; 2713 struct scb *scb; 2714 { 2715 struct scb *wscb; 2716 unsigned int opri; 2717 2718 opri = splbio(); 2719 2720 /* Clean up for the next user */ 2721 scb->flags = SCB_FREE; 2722 scb->control = 0; 2723 scb->status = 0; 2724 2725 if(scb->position == SCB_LIST_NULL) { 2726 STAILQ_INSERT_HEAD(&ahc->page_scbs, scb, links); 2727 if(!scb->links.stqe_next && !ahc->free_scbs.stqh_first) 2728 /* 2729 * If there were no SCBs available, wake anybody waiting 2730 * for one to come free. 2731 */ 2732 wakeup((caddr_t)&ahc->free_scbs); 2733 } 2734 /* 2735 * If there are any SCBS on the waiting queue, 2736 * assign the slot of this "freed" SCB to the first 2737 * one. We'll run the waiting queues after all command 2738 * completes for a particular interrupt are completed 2739 * or when we start another command. 2740 */ 2741 else if((wscb = ahc->waiting_scbs.stqh_first) != NULL) { 2742 STAILQ_REMOVE_HEAD(&ahc->waiting_scbs, links); 2743 wscb->position = scb->position; 2744 STAILQ_INSERT_TAIL(&ahc->assigned_scbs, wscb, links); 2745 wscb->flags ^= SCB_WAITINGQ|SCB_ASSIGNEDQ; 2746 2747 /* 2748 * The "freed" SCB will need to be assigned a slot 2749 * before being used, so put it in the page_scbs 2750 * queue. 2751 */ 2752 scb->position = SCB_LIST_NULL; 2753 STAILQ_INSERT_HEAD(&ahc->page_scbs, scb, links); 2754 if(!scb->links.stqe_next && !ahc->free_scbs.stqh_first) 2755 /* 2756 * If there were no SCBs available, wake anybody waiting 2757 * for one to come free. 2758 */ 2759 wakeup((caddr_t)&ahc->free_scbs); 2760 } 2761 else { 2762 STAILQ_INSERT_HEAD(&ahc->free_scbs, scb, links); 2763 if(!scb->links.stqe_next && !ahc->page_scbs.stqh_first) 2764 /* 2765 * If there were no SCBs available, wake anybody waiting 2766 * for one to come free. 2767 */ 2768 wakeup((caddr_t)&ahc->free_scbs); 2769 } 2770 #ifdef AHC_DEBUG 2771 ahc->activescbs--; 2772 #endif 2773 splx(opri); 2774 } 2775 2776 /* 2777 * Get a free scb, either one already assigned to a hardware slot 2778 * on the adapter or one that will require an SCB to be paged out before 2779 * use. If there are none, see if we can allocate a new SCB. Otherwise 2780 * either return an error or sleep. 2781 */ 2782 static struct scb * 2783 ahc_get_scb(ahc, flags) 2784 struct ahc_data *ahc; 2785 int flags; 2786 { 2787 unsigned opri; 2788 struct scb *scbp; 2789 2790 opri = splbio(); 2791 /* 2792 * If we can and have to, sleep waiting for one to come free 2793 * but only if we can't allocate a new one. 2794 */ 2795 while (1) { 2796 if((scbp = ahc->free_scbs.stqh_first)) { 2797 STAILQ_REMOVE_HEAD(&ahc->free_scbs, links); 2798 } 2799 else if((scbp = ahc->page_scbs.stqh_first)) { 2800 STAILQ_REMOVE_HEAD(&ahc->page_scbs, links); 2801 } 2802 else if(ahc->numscbs < ahc->maxscbs) { 2803 scbp = (struct scb *) malloc(sizeof(struct scb), 2804 M_TEMP, M_NOWAIT); 2805 if (scbp) { 2806 bzero(scbp, sizeof(struct scb)); 2807 scbp->tag = ahc->numscbs; 2808 if( ahc->numscbs < ahc->maxhscbs ) 2809 scbp->position = ahc->numscbs; 2810 else 2811 scbp->position = SCB_LIST_NULL; 2812 ahc->numscbs++; 2813 /* 2814 * Place in the scbarray 2815 * Never is removed. 2816 */ 2817 ahc->scbarray[scbp->tag] = scbp; 2818 } 2819 else { 2820 printf("%s: Can't malloc SCB\n", 2821 ahc_name(ahc)); 2822 } 2823 } 2824 else { 2825 if (!(flags & SCSI_NOSLEEP)) { 2826 tsleep((caddr_t)&ahc->free_scbs, PRIBIO, 2827 "ahcscb", 0); 2828 continue; 2829 } 2830 } 2831 break; 2832 } 2833 2834 #ifdef AHC_DEBUG 2835 if (scbp) { 2836 ahc->activescbs++; 2837 if((ahc_debug & AHC_SHOWSCBCNT) 2838 && (ahc->activescbs == ahc->maxhscbs)) 2839 printf("%s: Max SCBs active\n", ahc_name(ahc)); 2840 } 2841 #endif 2842 2843 splx(opri); 2844 2845 return (scbp); 2846 } 2847 2848 static void ahc_loadseq(ahc) 2849 struct ahc_data *ahc; 2850 { 2851 static u_char seqprog[] = { 2852 #if defined(__FreeBSD__) 2853 # include "aic7xxx_seq.h" 2854 #endif 2855 #if defined(__NetBSD__) 2856 # include <dev/microcode/aic7xxx/aic7xxx_seq.h> 2857 #endif 2858 }; 2859 2860 AHC_OUTB(ahc, SEQCTL, PERRORDIS|SEQRESET|LOADRAM); 2861 2862 AHC_OUTSB(ahc, SEQRAM, seqprog, sizeof(seqprog)); 2863 2864 do { 2865 AHC_OUTB(ahc, SEQCTL, SEQRESET|FASTMODE); 2866 } while((AHC_INB(ahc, SEQADDR0) != 0) 2867 || (AHC_INB(ahc, SEQADDR1) != 0)); 2868 } 2869 2870 /* 2871 * Function to poll for command completion when 2872 * interrupts are disabled (crash dumps) 2873 */ 2874 static int 2875 ahc_poll(ahc, wait) 2876 struct ahc_data *ahc; 2877 int wait; /* in msec */ 2878 { 2879 while (--wait) { 2880 DELAY(1000); 2881 if (AHC_INB(ahc, INTSTAT) & INT_PEND) 2882 break; 2883 } if (wait == 0) { 2884 printf("%s: board is not responding\n", ahc_name(ahc)); 2885 return (EIO); 2886 } 2887 ahc_intr((void *)ahc); 2888 return (0); 2889 } 2890 2891 static void 2892 ahc_timeout(arg) 2893 void *arg; 2894 { 2895 struct scb *scb = (struct scb *)arg; 2896 struct ahc_data *ahc; 2897 int s, found; 2898 u_char bus_state; 2899 char channel; 2900 2901 s = splbio(); 2902 2903 if (!(scb->flags & SCB_ACTIVE)) { 2904 /* Previous timeout took care of me already */ 2905 splx(s); 2906 return; 2907 } 2908 2909 ahc = (struct ahc_data *)scb->xs->sc_link->adapter_softc; 2910 2911 if (ahc->in_timeout) { 2912 /* 2913 * Some other SCB has started a recovery operation 2914 * and is still working on cleaning things up. 2915 */ 2916 if (scb->flags & SCB_TIMEDOUT) { 2917 /* 2918 * This SCB has been here before and is not the 2919 * recovery SCB. Cut our losses and panic. Its 2920 * better to do this than trash a filesystem. 2921 */ 2922 panic("%s: Timed-out command times out " 2923 "again\n", ahc_name(ahc)); 2924 } 2925 else if (!(scb->flags & SCB_ABORTED)) 2926 { 2927 /* 2928 * This is not the SCB that started this timeout 2929 * processing. Give this scb another lifetime so 2930 * that it can continue once we deal with the 2931 * timeout. 2932 */ 2933 scb->flags |= SCB_TIMEDOUT; 2934 timeout(ahc_timeout, (caddr_t)scb, 2935 (scb->xs->timeout * hz) / 1000); 2936 splx(s); 2937 return; 2938 } 2939 } 2940 ahc->in_timeout = TRUE; 2941 2942 /* 2943 * Ensure that the card doesn't do anything 2944 * behind our back. 2945 */ 2946 pause_sequencer(ahc); 2947 2948 sc_print_addr(scb->xs->sc_link); 2949 printf("timed out "); 2950 /* 2951 * Take a snapshot of the bus state and print out 2952 * some information so we can track down driver bugs. 2953 */ 2954 bus_state = AHC_INB(ahc, LASTPHASE); 2955 2956 switch(bus_state & PHASE_MASK) 2957 { 2958 case P_DATAOUT: 2959 printf("in dataout phase"); 2960 break; 2961 case P_DATAIN: 2962 printf("in datain phase"); 2963 break; 2964 case P_COMMAND: 2965 printf("in command phase"); 2966 break; 2967 case P_MESGOUT: 2968 printf("in message out phase"); 2969 break; 2970 case P_STATUS: 2971 printf("in status phase"); 2972 break; 2973 case P_MESGIN: 2974 printf("in message in phase"); 2975 break; 2976 default: 2977 printf("while idle, LASTPHASE == 0x%x", 2978 bus_state); 2979 /* 2980 * We aren't in a valid phase, so assume we're 2981 * idle. 2982 */ 2983 bus_state = 0; 2984 break; 2985 } 2986 2987 printf(", SCSISIGI == 0x%x\n", AHC_INB(ahc, SCSISIGI)); 2988 2989 /* Decide our course of action */ 2990 2991 if(scb->flags & SCB_ABORTED) 2992 { 2993 /* 2994 * Been down this road before. 2995 * Do a full bus reset. 2996 */ 2997 char channel = (scb->tcl & SELBUSB) 2998 ? 'B': 'A'; 2999 found = ahc_reset_channel(ahc, channel, scb->tag, 3000 XS_TIMEOUT, /*Initiate Reset*/TRUE); 3001 printf("%s: Issued Channel %c Bus Reset #1. " 3002 "%d SCBs aborted\n", ahc_name(ahc), channel, found); 3003 ahc->in_timeout = FALSE; 3004 } 3005 else if(scb->control & TAG_ENB) { 3006 /* 3007 * We could be starving this command 3008 * try sending an ordered tag command 3009 * to the target we come from. 3010 */ 3011 scb->flags |= SCB_ABORTED|SCB_SENTORDEREDTAG; 3012 ahc->orderedtag |= 0xFF; 3013 timeout(ahc_timeout, (caddr_t)scb, (5 * hz)); 3014 unpause_sequencer(ahc, /*unpause_always*/FALSE); 3015 printf("Ordered Tag queued\n"); 3016 goto done; 3017 } 3018 else { 3019 /* 3020 * Send a Bus Device Reset Message: 3021 * The target that is holding up the bus may not 3022 * be the same as the one that triggered this timeout 3023 * (different commands have different timeout lengths). 3024 * It is also impossible to get a message to a target 3025 * if we are in a "frozen" data transfer phase. Our 3026 * strategy here is to queue a bus device reset message 3027 * to the timed out target if it is disconnected. 3028 * Otherwise, if we have an active target we stuff the 3029 * message buffer with a bus device reset message and 3030 * assert ATN in the hopes that the target will let go 3031 * of the bus and finally disconnect. If this fails, 3032 * we'll get another timeout 2 seconds later which will 3033 * cause a bus reset. 3034 * 3035 * XXX If the SCB is paged out, we simply reset the 3036 * bus. We should probably queue a new command 3037 * instead. 3038 */ 3039 3040 /* Test to see if scb is disconnected */ 3041 if( !(scb->flags & SCB_PAGED_OUT ) ){ 3042 u_char active_scb; 3043 struct scb *active_scbp; 3044 3045 active_scb = AHC_INB(ahc, SCBPTR); 3046 active_scbp = ahc->scbarray[AHC_INB(ahc, SCB_TAG)]; 3047 AHC_OUTB(ahc, SCBPTR, scb->position); 3048 3049 if(AHC_INB(ahc, SCB_CONTROL) & DISCONNECTED) { 3050 if(ahc->flags & AHC_PAGESCBS) { 3051 /* 3052 * Pull this SCB out of the 3053 * disconnected list. 3054 */ 3055 u_char prev = AHC_INB(ahc, SCB_PREV); 3056 u_char next = AHC_INB(ahc, SCB_NEXT); 3057 if(prev == SCB_LIST_NULL) { 3058 /* At the head */ 3059 AHC_OUTB(ahc, DISCONNECTED_SCBH, 3060 next ); 3061 } 3062 else { 3063 AHC_OUTB(ahc, SCBPTR, prev); 3064 AHC_OUTB(ahc, SCB_NEXT, next); 3065 if(next != SCB_LIST_NULL) { 3066 AHC_OUTB(ahc, SCBPTR, 3067 next); 3068 AHC_OUTB(ahc, SCB_PREV, 3069 prev); 3070 } 3071 AHC_OUTB(ahc, SCBPTR, 3072 scb->position); 3073 } 3074 } 3075 scb->flags |= SCB_DEVICE_RESET|SCB_ABORTED; 3076 scb->control &= DISCENB; 3077 scb->control |= MK_MESSAGE; 3078 scb->cmdlen = 0; 3079 scb->SG_segment_count = 0; 3080 scb->SG_list_pointer = 0; 3081 scb->data = 0; 3082 scb->datalen = 0; 3083 ahc_send_scb(ahc, scb); 3084 ahc_add_waiting_scb(ahc, scb); 3085 timeout(ahc_timeout, (caddr_t)scb, (2 * hz)); 3086 sc_print_addr(scb->xs->sc_link); 3087 printf("BUS DEVICE RESET message queued.\n"); 3088 AHC_OUTB(ahc, SCBPTR, active_scb); 3089 unpause_sequencer(ahc, /*unpause_always*/FALSE); 3090 goto done; 3091 } 3092 /* Is the active SCB really active? */ 3093 else if((active_scbp->flags & SCB_ACTIVE) && bus_state){ 3094 AHC_OUTB(ahc, MSG_LEN, 1); 3095 AHC_OUTB(ahc, MSG0, MSG_BUS_DEV_RESET); 3096 AHC_OUTB(ahc, SCSISIGO, bus_state|ATNO); 3097 sc_print_addr(active_scbp->xs->sc_link); 3098 printf("asserted ATN - device reset in " 3099 "message buffer\n"); 3100 active_scbp->flags |= SCB_DEVICE_RESET 3101 | SCB_ABORTED; 3102 if(active_scbp != scb) { 3103 untimeout(ahc_timeout, 3104 (caddr_t)active_scbp); 3105 /* Give scb a new lease on life */ 3106 timeout(ahc_timeout, (caddr_t)scb, 3107 (scb->xs->timeout * hz) / 1000); 3108 } 3109 timeout(ahc_timeout, (caddr_t)active_scbp, 3110 (2 * hz)); 3111 AHC_OUTB(ahc, SCBPTR, active_scb); 3112 unpause_sequencer(ahc, /*unpause_always*/FALSE); 3113 goto done; 3114 } 3115 } 3116 /* 3117 * No active target or a paged out SCB. 3118 * Try resetting the bus. 3119 */ 3120 channel = (scb->tcl & SELBUSB) ? 'B': 'A'; 3121 found = ahc_reset_channel(ahc, channel, scb->tag, 3122 XS_TIMEOUT, 3123 /*Initiate Reset*/TRUE); 3124 printf("%s: Issued Channel %c Bus Reset #2. " 3125 "%d SCBs aborted\n", ahc_name(ahc), channel, 3126 found); 3127 ahc->in_timeout = FALSE; 3128 } 3129 done: 3130 splx(s); 3131 } 3132 3133 3134 /* 3135 * The device at the given target/channel has been reset. Abort 3136 * all active and queued scbs for that target/channel. 3137 */ 3138 static int 3139 ahc_reset_device(ahc, target, channel, timedout_scb, xs_error) 3140 struct ahc_data *ahc; 3141 int target; 3142 char channel; 3143 u_char timedout_scb; 3144 u_int32_t xs_error; 3145 { 3146 struct scb *scbp; 3147 u_char active_scb; 3148 int i = 0; 3149 int found = 0; 3150 3151 /* restore this when we're done */ 3152 active_scb = AHC_INB(ahc, SCBPTR); 3153 3154 /* 3155 * Search the QINFIFO. 3156 */ 3157 { 3158 u_char saved_queue[AHC_SCB_MAX]; 3159 u_char queued = AHC_INB(ahc, QINCNT) & ahc->qcntmask; 3160 3161 for (i = 0; i < (queued - found); i++) { 3162 saved_queue[i] = AHC_INB(ahc, QINFIFO); 3163 AHC_OUTB(ahc, SCBPTR, saved_queue[i]); 3164 scbp = ahc->scbarray[AHC_INB(ahc, SCB_TAG)]; 3165 if (ahc_match_scb (scbp, target, channel)){ 3166 /* 3167 * We found an scb that needs to be aborted. 3168 */ 3169 scbp->flags = SCB_ABORTED|SCB_QUEUED_FOR_DONE; 3170 scbp->xs->error |= xs_error; 3171 if(scbp->position != timedout_scb) 3172 untimeout(ahc_timeout, (caddr_t)scbp); 3173 AHC_OUTB(ahc, SCB_CONTROL, 0); 3174 i--; 3175 found++; 3176 } 3177 } 3178 /* Now put the saved scbs back. */ 3179 for (queued = 0; queued < i; queued++) { 3180 AHC_OUTB(ahc, QINFIFO, saved_queue[queued]); 3181 } 3182 } 3183 3184 /* 3185 * Search waiting for selection list. 3186 */ 3187 { 3188 u_char next, prev; 3189 3190 next = AHC_INB(ahc, WAITING_SCBH); /* Start at head of list. */ 3191 prev = SCB_LIST_NULL; 3192 3193 while (next != SCB_LIST_NULL) { 3194 AHC_OUTB(ahc, SCBPTR, next); 3195 scbp = ahc->scbarray[AHC_INB(ahc, SCB_TAG)]; 3196 /* 3197 * Select the SCB. 3198 */ 3199 if (ahc_match_scb(scbp, target, channel)) { 3200 next = ahc_abort_wscb(ahc, scbp, prev, 3201 timedout_scb, xs_error); 3202 found++; 3203 } 3204 else { 3205 prev = next; 3206 next = AHC_INB(ahc, SCB_NEXT); 3207 } 3208 } 3209 } 3210 /* 3211 * Go through the entire SCB array now and look for 3212 * commands for this target that are active. These 3213 * are other (most likely tagged) commands that 3214 * were disconnected when the reset occured. 3215 */ 3216 for(i = 0; i < ahc->numscbs; i++) { 3217 scbp = ahc->scbarray[i]; 3218 if((scbp->flags & SCB_ACTIVE) 3219 && ahc_match_scb(scbp, target, channel)) { 3220 /* Ensure the target is "free" */ 3221 ahc_unbusy_target(ahc, target, channel); 3222 if( !(scbp->flags & SCB_PAGED_OUT) ) 3223 { 3224 AHC_OUTB(ahc, SCBPTR, scbp->position); 3225 AHC_OUTB(ahc, SCB_CONTROL, 0); 3226 } 3227 scbp->flags = SCB_ABORTED|SCB_QUEUED_FOR_DONE; 3228 scbp->xs->error |= xs_error; 3229 if(scbp->tag != timedout_scb) 3230 untimeout(ahc_timeout, (caddr_t)scbp); 3231 found++; 3232 } 3233 } 3234 AHC_OUTB(ahc, SCBPTR, active_scb); 3235 return found; 3236 } 3237 3238 /* 3239 * Manipulate the waiting for selection list and return the 3240 * scb that follows the one that we remove. 3241 */ 3242 static u_char 3243 ahc_abort_wscb (ahc, scbp, prev, timedout_scb, xs_error) 3244 struct ahc_data *ahc; 3245 struct scb *scbp; 3246 u_char prev; 3247 u_char timedout_scb; 3248 u_int32_t xs_error; 3249 { 3250 u_char curscbp, next; 3251 int target = ((scbp->tcl >> 4) & 0x0f); 3252 char channel = (scbp->tcl & SELBUSB) ? 'B' : 'A'; 3253 /* 3254 * Select the SCB we want to abort and 3255 * pull the next pointer out of it. 3256 */ 3257 curscbp = AHC_INB(ahc, SCBPTR); 3258 AHC_OUTB(ahc, SCBPTR, scbp->position); 3259 next = AHC_INB(ahc, SCB_NEXT); 3260 3261 /* Clear the necessary fields */ 3262 AHC_OUTB(ahc, SCB_CONTROL, 0); 3263 AHC_OUTB(ahc, SCB_NEXT, SCB_LIST_NULL); 3264 ahc_unbusy_target(ahc, target, channel); 3265 3266 /* update the waiting list */ 3267 if( prev == SCB_LIST_NULL ) 3268 /* First in the list */ 3269 AHC_OUTB(ahc, WAITING_SCBH, next); 3270 else { 3271 /* 3272 * Select the scb that pointed to us 3273 * and update its next pointer. 3274 */ 3275 AHC_OUTB(ahc, SCBPTR, prev); 3276 AHC_OUTB(ahc, SCB_NEXT, next); 3277 } 3278 /* 3279 * Point us back at the original scb position 3280 * and inform the SCSI system that the command 3281 * has been aborted. 3282 */ 3283 AHC_OUTB(ahc, SCBPTR, curscbp); 3284 scbp->flags = SCB_ABORTED|SCB_QUEUED_FOR_DONE; 3285 scbp->xs->error |= xs_error; 3286 if(scbp->tag != timedout_scb) 3287 untimeout(ahc_timeout, (caddr_t)scbp); 3288 return next; 3289 } 3290 3291 static void 3292 ahc_busy_target(ahc, target, channel) 3293 struct ahc_data *ahc; 3294 u_char target; 3295 char channel; 3296 { 3297 u_char active; 3298 u_long active_port = ACTIVE_A; 3299 3300 if(target > 0x07 || channel == 'B') { 3301 /* 3302 * targets on the Second channel or 3303 * above id 7 store info in byte two 3304 * of HA_ACTIVE 3305 */ 3306 active_port++; 3307 } 3308 active = AHC_INB(ahc, active_port); 3309 active |= (0x01 << (target & 0x07)); 3310 AHC_OUTB(ahc, active_port, active); 3311 } 3312 3313 static void 3314 ahc_unbusy_target(ahc, target, channel) 3315 struct ahc_data *ahc; 3316 u_char target; 3317 char channel; 3318 { 3319 u_char active; 3320 u_long active_port = ACTIVE_A; 3321 3322 if(target > 0x07 || channel == 'B') { 3323 /* 3324 * targets on the Second channel or 3325 * above id 7 store info in byte two 3326 * of HA_ACTIVE 3327 */ 3328 active_port++; 3329 } 3330 active = AHC_INB(ahc, active_port); 3331 active &= ~(0x01 << (target & 0x07)); 3332 AHC_OUTB(ahc, active_port, active); 3333 } 3334 3335 static void 3336 ahc_reset_current_bus(ahc) 3337 struct ahc_data *ahc; 3338 { 3339 AHC_OUTB(ahc, SCSISEQ, SCSIRSTO); 3340 DELAY(1000); 3341 AHC_OUTB(ahc, SCSISEQ, 0); 3342 } 3343 3344 static int 3345 ahc_reset_channel(ahc, channel, timedout_scb, xs_error, initiate_reset) 3346 struct ahc_data *ahc; 3347 char channel; 3348 u_char timedout_scb; 3349 u_int32_t xs_error; 3350 u_char initiate_reset; 3351 { 3352 u_char sblkctl; 3353 char cur_channel; 3354 u_long offset, offset_max; 3355 int found; 3356 3357 /* 3358 * Clean up all the state information for the 3359 * pending transactions on this bus. 3360 */ 3361 found = ahc_reset_device(ahc, ALL_TARGETS, channel, 3362 timedout_scb, xs_error); 3363 if(channel == 'B'){ 3364 ahc->needsdtr |= (ahc->needsdtr_orig & 0xff00); 3365 ahc->sdtrpending &= 0x00ff; 3366 AHC_OUTB(ahc, ACTIVE_B, 0); 3367 offset = TARG_SCRATCH + 8; 3368 offset_max = TARG_SCRATCH + 16; 3369 } 3370 else if (ahc->type & AHC_WIDE){ 3371 ahc->needsdtr = ahc->needsdtr_orig; 3372 ahc->needwdtr = ahc->needwdtr_orig; 3373 ahc->sdtrpending = 0; 3374 ahc->wdtrpending = 0; 3375 AHC_OUTB(ahc, ACTIVE_A, 0); 3376 AHC_OUTB(ahc, ACTIVE_B, 0); 3377 offset = TARG_SCRATCH; 3378 offset_max = TARG_SCRATCH + 16; 3379 } 3380 else{ 3381 ahc->needsdtr |= (ahc->needsdtr_orig & 0x00ff); 3382 ahc->sdtrpending &= 0xff00; 3383 AHC_OUTB(ahc, ACTIVE_A, 0); 3384 offset = TARG_SCRATCH; 3385 offset_max = TARG_SCRATCH + 8; 3386 } 3387 for(;offset < offset_max;offset++) { 3388 /* 3389 * Revert to async/narrow transfers 3390 * until we renegotiate. 3391 */ 3392 u_char targ_scratch; 3393 3394 targ_scratch = AHC_INB(ahc, offset); 3395 targ_scratch &= SXFR; 3396 AHC_OUTB(ahc, offset, targ_scratch); 3397 } 3398 3399 /* 3400 * Reset the bus if we are initiating this reset and 3401 * restart/unpause the sequencer 3402 */ 3403 /* Case 1: Command for another bus is active */ 3404 sblkctl = AHC_INB(ahc, SBLKCTL); 3405 cur_channel = (sblkctl & SELBUSB) ? 'B' : 'A'; 3406 if(cur_channel != channel) 3407 { 3408 /* 3409 * Stealthily reset the other bus 3410 * without upsetting the current bus 3411 */ 3412 AHC_OUTB(ahc, SBLKCTL, sblkctl ^ SELBUSB); 3413 if( initiate_reset ) 3414 { 3415 ahc_reset_current_bus(ahc); 3416 } 3417 AHC_OUTB(ahc, CLRSINT1, CLRSCSIRSTI|CLRSELTIMEO); 3418 AHC_OUTB(ahc, CLRINT, CLRSCSIINT); 3419 AHC_OUTB(ahc, SBLKCTL, sblkctl); 3420 unpause_sequencer(ahc, /*unpause_always*/TRUE); 3421 } 3422 /* Case 2: A command from this bus is active or we're idle */ 3423 else { 3424 if( initiate_reset ) 3425 { 3426 ahc_reset_current_bus(ahc); 3427 } 3428 AHC_OUTB(ahc, CLRSINT1, CLRSCSIRSTI|CLRSELTIMEO); 3429 AHC_OUTB(ahc, CLRINT, CLRSCSIINT); 3430 restart_sequencer(ahc); 3431 } 3432 ahc_run_done_queue(ahc); 3433 return found; 3434 } 3435 3436 void 3437 ahc_run_done_queue(ahc) 3438 struct ahc_data *ahc; 3439 { 3440 int i; 3441 struct scb *scbp; 3442 3443 for(i = 0; i < ahc->numscbs; i++) { 3444 scbp = ahc->scbarray[i]; 3445 if(scbp->flags & SCB_QUEUED_FOR_DONE) 3446 ahc_done(ahc, scbp); 3447 } 3448 } 3449 3450 static int 3451 ahc_match_scb (scb, target, channel) 3452 struct scb *scb; 3453 int target; 3454 char channel; 3455 { 3456 int targ = (scb->tcl >> 4) & 0x0f; 3457 char chan = (scb->tcl & SELBUSB) ? 'B' : 'A'; 3458 3459 if (target == ALL_TARGETS) 3460 return (chan == channel); 3461 else 3462 return ((chan == channel) && (targ == target)); 3463 } 3464 3465 3466 static void 3467 ahc_construct_sdtr(ahc, start_byte, period, offset) 3468 struct ahc_data *ahc; 3469 int start_byte; 3470 u_int8_t period; 3471 u_int8_t offset; 3472 { 3473 AHC_OUTB(ahc, MSG0 + start_byte, MSG_EXTENDED); 3474 AHC_OUTB(ahc, MSG1 + start_byte, MSG_EXT_SDTR_LEN); 3475 AHC_OUTB(ahc, MSG2 + start_byte, MSG_EXT_SDTR); 3476 AHC_OUTB(ahc, MSG3 + start_byte, period); 3477 AHC_OUTB(ahc, MSG4 + start_byte, offset); 3478 AHC_OUTB(ahc, MSG_LEN, start_byte + 5); 3479 } 3480 3481 static void 3482 ahc_construct_wdtr(ahc, start_byte, bus_width) 3483 struct ahc_data *ahc; 3484 int start_byte; 3485 u_int8_t bus_width; 3486 { 3487 AHC_OUTB(ahc, MSG0 + start_byte, MSG_EXTENDED); 3488 AHC_OUTB(ahc, MSG1 + start_byte, MSG_EXT_WDTR_LEN); 3489 AHC_OUTB(ahc, MSG2 + start_byte, MSG_EXT_WDTR); 3490 AHC_OUTB(ahc, MSG3 + start_byte, bus_width); 3491 AHC_OUTB(ahc, MSG_LEN, start_byte + 4); 3492 } 3493
Indexes created Tue Sep 30 17:09:57 GMT 2025