ahb.c revision 298955
1/*- 2 * CAM SCSI device driver for the Adaptec 174X SCSI Host adapter 3 * 4 * Copyright (c) 1998 Justin T. Gibbs 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice immediately at the beginning of the file, without modification, 12 * this list of conditions, and the following disclaimer. 13 * 2. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD: head/sys/dev/ahb/ahb.c 298955 2016-05-03 03:41:25Z pfg $ 29 */ 30 31#include <sys/param.h> 32#include <sys/conf.h> 33#include <sys/systm.h> 34#include <sys/kernel.h> 35#include <sys/malloc.h> 36#include <sys/module.h> 37#include <sys/lock.h> 38#include <sys/mutex.h> 39#include <sys/bus.h> 40 41#include <machine/bus.h> 42#include <machine/resource.h> 43#include <sys/rman.h> 44 45#include <cam/cam.h> 46#include <cam/cam_ccb.h> 47#include <cam/cam_sim.h> 48#include <cam/cam_xpt_sim.h> 49#include <cam/cam_debug.h> 50 51#include <cam/scsi/scsi_message.h> 52 53#include <dev/eisa/eisaconf.h> 54 55#include <dev/ahb/ahbreg.h> 56 57#define ccb_ecb_ptr spriv_ptr0 58#define ccb_ahb_ptr spriv_ptr1 59 60#define ahb_inb(ahb, port) \ 61 bus_read_1((ahb)->res, port) 62 63#define ahb_inl(ahb, port) \ 64 bus_read_4((ahb)->res, port) 65 66#define ahb_outb(ahb, port, value) \ 67 bus_write_1((ahb)->res, port, value) 68 69#define ahb_outl(ahb, port, value) \ 70 bus_write_4((ahb)->res, port, value) 71 72static const char *ahbmatch(eisa_id_t type); 73static struct ahb_softc *ahballoc(device_t dev, struct resource *res); 74static void ahbfree(struct ahb_softc *ahb); 75static int ahbreset(struct ahb_softc *ahb); 76static void ahbmapecbs(void *arg, bus_dma_segment_t *segs, 77 int nseg, int error); 78static int ahbxptattach(struct ahb_softc *ahb); 79static void ahbhandleimmed(struct ahb_softc *ahb, 80 u_int32_t mbox, u_int intstat); 81static void ahbcalcresid(struct ahb_softc *ahb, 82 struct ecb *ecb, union ccb *ccb); 83static __inline void ahbdone(struct ahb_softc *ahb, u_int32_t mbox, 84 u_int intstat); 85static void ahbintr(void *arg); 86static void ahbintr_locked(struct ahb_softc *ahb); 87static bus_dmamap_callback_t ahbexecuteecb; 88static void ahbaction(struct cam_sim *sim, union ccb *ccb); 89static void ahbpoll(struct cam_sim *sim); 90 91/* Our timeout handler */ 92static void ahbtimeout(void *arg); 93 94static __inline struct ecb* ahbecbget(struct ahb_softc *ahb); 95static __inline void ahbecbfree(struct ahb_softc* ahb, 96 struct ecb* ecb); 97static __inline u_int32_t ahbecbvtop(struct ahb_softc *ahb, 98 struct ecb *ecb); 99static __inline struct ecb* ahbecbptov(struct ahb_softc *ahb, 100 u_int32_t ecb_addr); 101static __inline u_int32_t ahbstatuspaddr(u_int32_t ecb_paddr); 102static __inline u_int32_t ahbsensepaddr(u_int32_t ecb_paddr); 103static __inline u_int32_t ahbsgpaddr(u_int32_t ecb_paddr); 104static __inline void ahbqueuembox(struct ahb_softc *ahb, 105 u_int32_t mboxval, 106 u_int attn_code); 107 108static __inline struct ecb* 109ahbecbget(struct ahb_softc *ahb) 110{ 111 struct ecb* ecb; 112 113 if (!dumping) 114 mtx_assert(&ahb->lock, MA_OWNED); 115 if ((ecb = SLIST_FIRST(&ahb->free_ecbs)) != NULL) 116 SLIST_REMOVE_HEAD(&ahb->free_ecbs, links); 117 118 return (ecb); 119} 120 121static __inline void 122ahbecbfree(struct ahb_softc* ahb, struct ecb* ecb) 123{ 124 125 if (!dumping) 126 mtx_assert(&ahb->lock, MA_OWNED); 127 ecb->state = ECB_FREE; 128 SLIST_INSERT_HEAD(&ahb->free_ecbs, ecb, links); 129} 130 131static __inline u_int32_t 132ahbecbvtop(struct ahb_softc *ahb, struct ecb *ecb) 133{ 134 return (ahb->ecb_physbase 135 + (u_int32_t)((caddr_t)ecb - (caddr_t)ahb->ecb_array)); 136} 137 138static __inline struct ecb* 139ahbecbptov(struct ahb_softc *ahb, u_int32_t ecb_addr) 140{ 141 return (ahb->ecb_array 142 + ((struct ecb*)(uintptr_t)ecb_addr 143 - (struct ecb*)(uintptr_t)ahb->ecb_physbase)); 144} 145 146static __inline u_int32_t 147ahbstatuspaddr(u_int32_t ecb_paddr) 148{ 149 return (ecb_paddr + offsetof(struct ecb, status)); 150} 151 152static __inline u_int32_t 153ahbsensepaddr(u_int32_t ecb_paddr) 154{ 155 return (ecb_paddr + offsetof(struct ecb, sense)); 156} 157 158static __inline u_int32_t 159ahbsgpaddr(u_int32_t ecb_paddr) 160{ 161 return (ecb_paddr + offsetof(struct ecb, sg_list)); 162} 163 164static __inline void 165ahbqueuembox(struct ahb_softc *ahb, u_int32_t mboxval, u_int attn_code) 166{ 167 u_int loopmax = 300; 168 while (--loopmax) { 169 u_int status; 170 171 status = ahb_inb(ahb, HOSTSTAT); 172 if ((status & (HOSTSTAT_MBOX_EMPTY|HOSTSTAT_BUSY)) 173 == HOSTSTAT_MBOX_EMPTY) 174 break; 175 DELAY(20); 176 } 177 if (loopmax == 0) 178 panic("%s: adapter not taking commands\n", 179 device_get_nameunit(ahb->dev)); 180 181 ahb_outl(ahb, MBOXOUT0, mboxval); 182 ahb_outb(ahb, ATTN, attn_code); 183} 184 185static const char * 186ahbmatch(eisa_id_t type) 187{ 188 switch(type & 0xfffffe00) { 189 case EISA_DEVICE_ID_ADAPTEC_1740: 190 return ("Adaptec 174x SCSI host adapter"); 191 break; 192 default: 193 break; 194 } 195 return (NULL); 196} 197 198static int 199ahbprobe(device_t dev) 200{ 201 const char *desc; 202 u_int32_t iobase; 203 u_int32_t irq; 204 u_int8_t intdef; 205 int shared; 206 207 desc = ahbmatch(eisa_get_id(dev)); 208 if (!desc) 209 return (ENXIO); 210 device_set_desc(dev, desc); 211 212 iobase = (eisa_get_slot(dev) * EISA_SLOT_SIZE) + 213 AHB_EISA_SLOT_OFFSET; 214 215 eisa_add_iospace(dev, iobase, AHB_EISA_IOSIZE, RESVADDR_NONE); 216 217 intdef = inb(INTDEF + iobase); 218 switch (intdef & 0x7) { 219 case INT9: 220 irq = 9; 221 break; 222 case INT10: 223 irq = 10; 224 break; 225 case INT11: 226 irq = 11; 227 break; 228 case INT12: 229 irq = 12; 230 break; 231 case INT14: 232 irq = 14; 233 break; 234 case INT15: 235 irq = 15; 236 break; 237 default: 238 printf("Adaptec 174X at slot %d: illegal " 239 "irq setting %d\n", eisa_get_slot(dev), 240 (intdef & 0x7)); 241 irq = 0; 242 break; 243 } 244 if (irq == 0) 245 return ENXIO; 246 247 shared = (inb(INTDEF + iobase) & INTLEVEL) ? 248 EISA_TRIGGER_LEVEL : EISA_TRIGGER_EDGE; 249 250 eisa_add_intr(dev, irq, shared); 251 252 return 0; 253} 254 255static int 256ahbattach(device_t dev) 257{ 258 /* 259 * find unit and check we have that many defined 260 */ 261 struct ahb_softc *ahb; 262 struct ecb* next_ecb; 263 struct resource *io; 264 struct resource *irq; 265 int rid; 266 void *ih; 267 268 irq = NULL; 269 rid = 0; 270 io = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE); 271 if (io == NULL) { 272 device_printf(dev, "No I/O space?!\n"); 273 return ENOMEM; 274 } 275 276 ahb = ahballoc(dev, io); 277 278 if (ahbreset(ahb) != 0) 279 goto error_exit; 280 281 rid = 0; 282 irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE); 283 if (irq == NULL) { 284 device_printf(dev, "Can't allocate interrupt\n"); 285 goto error_exit; 286 } 287 288 /* 289 * Create our DMA tags. These tags define the kinds of device 290 * accessible memory allocations and memory mappings we will 291 * need to perform during normal operation. 292 */ 293 /* DMA tag for mapping buffers into device visible space. */ 294 if (bus_dma_tag_create( /* parent */ bus_get_dma_tag(dev), 295 /* alignment */ 1, 296 /* boundary */ 0, 297 /* lowaddr */ BUS_SPACE_MAXADDR_32BIT, 298 /* highaddr */ BUS_SPACE_MAXADDR, 299 /* filter */ NULL, 300 /* filterarg */ NULL, 301 /* maxsize */ DFLTPHYS, 302 /* nsegments */ AHB_NSEG, 303 /* maxsegsz */ BUS_SPACE_MAXSIZE_32BIT, 304 /* flags */ BUS_DMA_ALLOCNOW, 305 /* lockfunc */ busdma_lock_mutex, 306 /* lockarg */ &ahb->lock, 307 &ahb->buffer_dmat) != 0) 308 goto error_exit; 309 310 ahb->init_level++; 311 312 /* DMA tag for our ccb structures and ha inquiry data */ 313 if (bus_dma_tag_create( /* parent */ bus_get_dma_tag(dev), 314 /* alignment */ 1, 315 /* boundary */ 0, 316 /* lowaddr */ BUS_SPACE_MAXADDR_32BIT, 317 /* highaddr */ BUS_SPACE_MAXADDR, 318 /* filter */ NULL, 319 /* filterarg */ NULL, 320 /* maxsize */ (AHB_NECB * 321 sizeof(struct ecb)) 322 + sizeof(*ahb->ha_inq_data), 323 /* nsegments */ 1, 324 /* maxsegsz */ BUS_SPACE_MAXSIZE_32BIT, 325 /* flags */ 0, 326 /* lockfunc */ NULL, 327 /* lockarg */ NULL, 328 &ahb->ecb_dmat) != 0) 329 goto error_exit; 330 331 ahb->init_level++; 332 333 /* Allocation for our ccbs */ 334 if (bus_dmamem_alloc(ahb->ecb_dmat, (void **)&ahb->ecb_array, 335 BUS_DMA_NOWAIT, &ahb->ecb_dmamap) != 0) 336 goto error_exit; 337 338 ahb->ha_inq_data = (struct ha_inquiry_data *)&ahb->ecb_array[AHB_NECB]; 339 340 ahb->init_level++; 341 342 /* And permanently map them */ 343 bus_dmamap_load(ahb->ecb_dmat, ahb->ecb_dmamap, 344 ahb->ecb_array, AHB_NSEG * sizeof(struct ecb), 345 ahbmapecbs, ahb, /*flags*/0); 346 347 ahb->init_level++; 348 349 /* Allocate the buffer dmamaps for each of our ECBs */ 350 bzero(ahb->ecb_array, (AHB_NECB * sizeof(struct ecb)) 351 + sizeof(*ahb->ha_inq_data)); 352 next_ecb = ahb->ecb_array; 353 while (ahb->num_ecbs < AHB_NECB) { 354 u_int32_t ecb_paddr; 355 356 if (bus_dmamap_create(ahb->buffer_dmat, /*flags*/0, 357 &next_ecb->dmamap)) 358 break; 359 callout_init_mtx(&next_ecb->timer, &ahb->lock, 0); 360 ecb_paddr = ahbecbvtop(ahb, next_ecb); 361 next_ecb->hecb.status_ptr = ahbstatuspaddr(ecb_paddr); 362 next_ecb->hecb.sense_ptr = ahbsensepaddr(ecb_paddr); 363 ahb->num_ecbs++; 364 ahbecbfree(ahb, next_ecb); 365 next_ecb++; 366 } 367 368 ahb->init_level++; 369 370 /* 371 * Now that we know we own the resources we need, register 372 * our bus with the XPT. 373 */ 374 if (ahbxptattach(ahb)) 375 goto error_exit; 376 377 /* Enable our interrupt */ 378 if (bus_setup_intr(dev, irq, INTR_TYPE_CAM|INTR_ENTROPY|INTR_MPSAFE, 379 NULL, ahbintr, ahb, &ih) != 0) 380 goto error_exit; 381 382 return (0); 383 384error_exit: 385 /* 386 * The board's IRQ line will not be left enabled 387 * if we can't initialize correctly, so its safe 388 * to release the irq. 389 */ 390 ahbfree(ahb); 391 if (irq != NULL) 392 bus_release_resource(dev, SYS_RES_IRQ, 0, irq); 393 bus_release_resource(dev, SYS_RES_IOPORT, 0, io); 394 return (-1); 395} 396 397static struct ahb_softc * 398ahballoc(device_t dev, struct resource *res) 399{ 400 struct ahb_softc *ahb; 401 402 ahb = device_get_softc(dev); 403 SLIST_INIT(&ahb->free_ecbs); 404 LIST_INIT(&ahb->pending_ccbs); 405 ahb->res = res; 406 ahb->disc_permitted = ~0; 407 ahb->tags_permitted = ~0; 408 ahb->dev = dev; 409 mtx_init(&ahb->lock, "ahb", NULL, MTX_DEF); 410 411 return (ahb); 412} 413 414static void 415ahbfree(struct ahb_softc *ahb) 416{ 417 switch (ahb->init_level) { 418 default: 419 case 4: 420 bus_dmamap_unload(ahb->ecb_dmat, ahb->ecb_dmamap); 421 case 3: 422 bus_dmamem_free(ahb->ecb_dmat, ahb->ecb_array, 423 ahb->ecb_dmamap); 424 case 2: 425 bus_dma_tag_destroy(ahb->ecb_dmat); 426 case 1: 427 bus_dma_tag_destroy(ahb->buffer_dmat); 428 case 0: 429 break; 430 } 431 mtx_destroy(&ahb->lock); 432} 433 434/* 435 * reset board, If it doesn't respond, return failure 436 */ 437static int 438ahbreset(struct ahb_softc *ahb) 439{ 440 int wait = 1000; /* 1 sec enough? */ 441 int test; 442 443 if ((ahb_inb(ahb, PORTADDR) & PORTADDR_ENHANCED) == 0) { 444 printf("ahb_reset: Controller not in enhanced mode\n"); 445 return (-1); 446 } 447 448 ahb_outb(ahb, CONTROL, CNTRL_HARD_RST); 449 DELAY(1000); 450 ahb_outb(ahb, CONTROL, 0); 451 while (--wait) { 452 DELAY(1000); 453 if ((ahb_inb(ahb, HOSTSTAT) & HOSTSTAT_BUSY) == 0) 454 break; 455 } 456 457 if (wait == 0) { 458 printf("ahbreset: No answer from aha1742 board\n"); 459 return (-1); 460 } 461 if ((test = ahb_inb(ahb, MBOXIN0)) != 0) { 462 printf("ahb_reset: self test failed, val = 0x%x\n", test); 463 return (-1); 464 } 465 while (ahb_inb(ahb, HOSTSTAT) & HOSTSTAT_INTPEND) { 466 ahb_outb(ahb, CONTROL, CNTRL_CLRINT); 467 DELAY(10000); 468 } 469 return (0); 470} 471 472static void 473ahbmapecbs(void *arg, bus_dma_segment_t *segs, int nseg, int error) 474{ 475 struct ahb_softc* ahb; 476 477 ahb = (struct ahb_softc*)arg; 478 ahb->ecb_physbase = segs->ds_addr; 479 /* 480 * Space for adapter inquiry information is on the 481 * tail of the ecb array. 482 */ 483 ahb->ha_inq_physbase = ahbecbvtop(ahb, &ahb->ecb_array[AHB_NECB]); 484} 485 486static int 487ahbxptattach(struct ahb_softc *ahb) 488{ 489 struct cam_devq *devq; 490 struct ecb *ecb; 491 u_int i; 492 493 mtx_lock(&ahb->lock); 494 495 /* Remember who are we on the scsi bus */ 496 ahb->scsi_id = ahb_inb(ahb, SCSIDEF) & HSCSIID; 497 498 /* Use extended translation?? */ 499 ahb->extended_trans = ahb_inb(ahb, RESV1) & EXTENDED_TRANS; 500 501 /* Fetch adapter inquiry data */ 502 ecb = ahbecbget(ahb); /* Always succeeds - no outstanding commands */ 503 ecb->hecb.opcode = ECBOP_READ_HA_INQDATA; 504 ecb->hecb.flag_word1 = FW1_SUPPRESS_URUN_ERR|FW1_ERR_STATUS_BLK_ONLY; 505 ecb->hecb.data_ptr = ahb->ha_inq_physbase; 506 ecb->hecb.data_len = sizeof(struct ha_inquiry_data); 507 ecb->hecb.sense_ptr = 0; 508 ecb->state = ECB_ACTIVE; 509 510 /* Tell the adapter about this command */ 511 ahbqueuembox(ahb, ahbecbvtop(ahb, ecb), 512 ATTN_STARTECB|ahb->scsi_id); 513 514 /* Poll for interrupt completion */ 515 for (i = 1000; ecb->state != ECB_FREE && i != 0; i--) { 516 ahbintr_locked(ahb); 517 DELAY(1000); 518 } 519 520 ahb->num_ecbs = MIN(ahb->num_ecbs, 521 ahb->ha_inq_data->scsi_data.spc2_flags); 522 device_printf(ahb->dev, 523 "%.8s %s SCSI Adapter, FW Rev. %.4s, ID=%d, %d ECBs\n", 524 ahb->ha_inq_data->scsi_data.product, 525 (ahb->ha_inq_data->scsi_data.flags & 0x4) ? "Differential" 526 : "Single Ended", 527 ahb->ha_inq_data->scsi_data.revision, 528 ahb->scsi_id, ahb->num_ecbs); 529 530 /* Restore sense paddr for future CCB clients */ 531 ecb->hecb.sense_ptr = ahbsensepaddr(ahbecbvtop(ahb, ecb)); 532 533 ahbecbfree(ahb, ecb); 534 535 /* 536 * Create the device queue for our SIM. 537 */ 538 devq = cam_simq_alloc(ahb->num_ecbs); 539 if (devq == NULL) { 540 mtx_unlock(&ahb->lock); 541 return (ENOMEM); 542 } 543 544 /* 545 * Construct our SIM entry 546 */ 547 ahb->sim = cam_sim_alloc(ahbaction, ahbpoll, "ahb", ahb, 548 device_get_unit(ahb->dev), &ahb->lock, 2, ahb->num_ecbs, devq); 549 if (ahb->sim == NULL) { 550 cam_simq_free(devq); 551 mtx_unlock(&ahb->lock); 552 return (ENOMEM); 553 } 554 555 if (xpt_bus_register(ahb->sim, ahb->dev, 0) != CAM_SUCCESS) { 556 cam_sim_free(ahb->sim, /*free_devq*/TRUE); 557 mtx_unlock(&ahb->lock); 558 return (ENXIO); 559 } 560 561 if (xpt_create_path(&ahb->path, /*periph*/NULL, 562 cam_sim_path(ahb->sim), CAM_TARGET_WILDCARD, 563 CAM_LUN_WILDCARD) != CAM_REQ_CMP) { 564 xpt_bus_deregister(cam_sim_path(ahb->sim)); 565 cam_sim_free(ahb->sim, /*free_devq*/TRUE); 566 mtx_unlock(&ahb->lock); 567 return (ENXIO); 568 } 569 570 /* 571 * Allow the board to generate interrupts. 572 */ 573 ahb_outb(ahb, INTDEF, ahb_inb(ahb, INTDEF) | INTEN); 574 mtx_unlock(&ahb->lock); 575 576 return (0); 577} 578 579static void 580ahbhandleimmed(struct ahb_softc *ahb, u_int32_t mbox, u_int intstat) 581{ 582 struct ccb_hdr *ccb_h; 583 u_int target_id; 584 585 if (ahb->immed_cmd == 0) { 586 device_printf(ahb->dev, "Immediate Command complete with no " 587 " pending command\n"); 588 return; 589 } 590 591 target_id = intstat & INTSTAT_TARGET_MASK; 592 593 ccb_h = LIST_FIRST(&ahb->pending_ccbs); 594 while (ccb_h != NULL) { 595 struct ecb *pending_ecb; 596 union ccb *ccb; 597 598 pending_ecb = (struct ecb *)ccb_h->ccb_ecb_ptr; 599 ccb = pending_ecb->ccb; 600 ccb_h = LIST_NEXT(ccb_h, sim_links.le); 601 if (ccb->ccb_h.target_id == target_id 602 || target_id == ahb->scsi_id) { 603 callout_stop(&pending_ecb->timer); 604 LIST_REMOVE(&ccb->ccb_h, sim_links.le); 605 if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) 606 bus_dmamap_unload(ahb->buffer_dmat, 607 pending_ecb->dmamap); 608 if (pending_ecb == ahb->immed_ecb) 609 ccb->ccb_h.status = 610 CAM_CMD_TIMEOUT|CAM_RELEASE_SIMQ; 611 else if (target_id == ahb->scsi_id) 612 ccb->ccb_h.status = CAM_SCSI_BUS_RESET; 613 else 614 ccb->ccb_h.status = CAM_BDR_SENT; 615 ahbecbfree(ahb, pending_ecb); 616 xpt_done(ccb); 617 } else if (ahb->immed_ecb != NULL) { 618 /* Re-instate timeout */ 619 callout_reset_sbt(&pending_ecb->timer, 620 SBT_1MS * ccb->ccb_h.timeout, 0, ahbtimeout, 621 pending_ecb, 0); 622 } 623 } 624 625 if (ahb->immed_ecb != NULL) { 626 ahb->immed_ecb = NULL; 627 device_printf(ahb->dev, "No longer in timeout\n"); 628 } else if (target_id == ahb->scsi_id) 629 device_printf(ahb->dev, "SCSI Bus Reset Delivered\n"); 630 else 631 device_printf(ahb->dev, 632 "Bus Device Reset Delivered to target %d\n", target_id); 633 634 ahb->immed_cmd = 0; 635} 636 637static void 638ahbcalcresid(struct ahb_softc *ahb, struct ecb *ecb, union ccb *ccb) 639{ 640 if (ecb->status.data_overrun != 0) { 641 /* 642 * Overrun Condition. The hardware doesn't 643 * provide a meaningful byte count in this case 644 * (the residual is always 0). Tell the XPT 645 * layer about the error. 646 */ 647 ccb->ccb_h.status = CAM_DATA_RUN_ERR; 648 } else { 649 ccb->csio.resid = ecb->status.resid_count; 650 651 if ((ecb->hecb.flag_word1 & FW1_SG_ECB) != 0) { 652 /* 653 * For S/G transfers, the adapter provides a pointer 654 * to the address in the last S/G element used and a 655 * residual for that element. So, we need to sum up 656 * the elements that follow it in order to get a real 657 * residual number. If we have an overrun, the residual 658 * reported will be 0 and we already know that all S/G 659 * segments have been exhausted, so we can skip this 660 * step. 661 */ 662 ahb_sg_t *sg; 663 int num_sg; 664 665 num_sg = ecb->hecb.data_len / sizeof(ahb_sg_t); 666 667 /* Find the S/G the adapter was working on */ 668 for (sg = ecb->sg_list; 669 num_sg != 0 && sg->addr != ecb->status.resid_addr; 670 num_sg--, sg++) 671 ; 672 673 /* Skip it */ 674 num_sg--; 675 sg++; 676 677 /* Sum the rest */ 678 for (; num_sg != 0; num_sg--, sg++) 679 ccb->csio.resid += sg->len; 680 } 681 /* Underruns are not errors */ 682 ccb->ccb_h.status = CAM_REQ_CMP; 683 } 684} 685 686static void 687ahbprocesserror(struct ahb_softc *ahb, struct ecb *ecb, union ccb *ccb) 688{ 689 struct hardware_ecb *hecb; 690 struct ecb_status *status; 691 692 hecb = &ecb->hecb; 693 status = &ecb->status; 694 switch (status->ha_status) { 695 case HS_OK: 696 ccb->csio.scsi_status = status->scsi_status; 697 if (status->scsi_status != 0) { 698 ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR; 699 if (status->sense_stored) { 700 ccb->ccb_h.status |= CAM_AUTOSNS_VALID; 701 ccb->csio.sense_resid = 702 ccb->csio.sense_len - status->sense_len; 703 bcopy(&ecb->sense, &ccb->csio.sense_data, 704 status->sense_len); 705 } 706 } 707 break; 708 case HS_TARGET_NOT_ASSIGNED: 709 ccb->ccb_h.status = CAM_PATH_INVALID; 710 break; 711 case HS_SEL_TIMEOUT: 712 ccb->ccb_h.status = CAM_SEL_TIMEOUT; 713 break; 714 case HS_DATA_RUN_ERR: 715 ahbcalcresid(ahb, ecb, ccb); 716 break; 717 case HS_UNEXPECTED_BUSFREE: 718 ccb->ccb_h.status = CAM_UNEXP_BUSFREE; 719 break; 720 case HS_INVALID_PHASE: 721 ccb->ccb_h.status = CAM_SEQUENCE_FAIL; 722 break; 723 case HS_REQUEST_SENSE_FAILED: 724 ccb->ccb_h.status = CAM_AUTOSENSE_FAIL; 725 break; 726 case HS_TAG_MSG_REJECTED: 727 { 728 struct ccb_trans_settings neg; 729 struct ccb_trans_settings_scsi *scsi = &neg.proto_specific.scsi; 730 731 xpt_print_path(ccb->ccb_h.path); 732 printf("refuses tagged commands. Performing " 733 "non-tagged I/O\n"); 734 memset(&neg, 0, sizeof (neg)); 735 neg.protocol = PROTO_SCSI; 736 neg.protocol_version = SCSI_REV_2; 737 neg.transport = XPORT_SPI; 738 neg.transport_version = 2; 739 scsi->flags = CTS_SCSI_VALID_TQ; 740 xpt_setup_ccb(&neg.ccb_h, ccb->ccb_h.path, /*priority*/1); 741 xpt_async(AC_TRANSFER_NEG, ccb->ccb_h.path, &neg); 742 ahb->tags_permitted &= ~(0x01 << ccb->ccb_h.target_id); 743 ccb->ccb_h.status = CAM_MSG_REJECT_REC; 744 break; 745 } 746 case HS_FIRMWARE_LOAD_REQ: 747 case HS_HARDWARE_ERR: 748 /* 749 * Tell the system that the Adapter 750 * is no longer functional. 751 */ 752 ccb->ccb_h.status = CAM_NO_HBA; 753 break; 754 case HS_CMD_ABORTED_HOST: 755 case HS_CMD_ABORTED_ADAPTER: 756 case HS_ATN_TARGET_FAILED: 757 case HS_SCSI_RESET_ADAPTER: 758 case HS_SCSI_RESET_INCOMING: 759 ccb->ccb_h.status = CAM_SCSI_BUS_RESET; 760 break; 761 case HS_INVALID_ECB_PARAM: 762 device_printf(ahb->dev, 763 "opcode 0x%02x, flag_word1 0x%02x, flag_word2 0x%02x\n", 764 hecb->opcode, hecb->flag_word1, hecb->flag_word2); 765 ccb->ccb_h.status = CAM_SCSI_BUS_RESET; 766 break; 767 case HS_DUP_TCB_RECEIVED: 768 case HS_INVALID_OPCODE: 769 case HS_INVALID_CMD_LINK: 770 case HS_PROGRAM_CKSUM_ERROR: 771 panic("%s: Can't happen host status %x occurred", 772 device_get_nameunit(ahb->dev), status->ha_status); 773 break; 774 } 775 if (ccb->ccb_h.status != CAM_REQ_CMP) { 776 xpt_freeze_devq(ccb->ccb_h.path, /*count*/1); 777 ccb->ccb_h.status |= CAM_DEV_QFRZN; 778 } 779} 780 781static void 782ahbdone(struct ahb_softc *ahb, u_int32_t mbox, u_int intstat) 783{ 784 struct ecb *ecb; 785 union ccb *ccb; 786 787 ecb = ahbecbptov(ahb, mbox); 788 789 if ((ecb->state & ECB_ACTIVE) == 0) 790 panic("ecb not active"); 791 792 ccb = ecb->ccb; 793 794 if (ccb != NULL) { 795 callout_stop(&ecb->timer); 796 LIST_REMOVE(&ccb->ccb_h, sim_links.le); 797 798 if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) { 799 bus_dmasync_op_t op; 800 801 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) 802 op = BUS_DMASYNC_POSTREAD; 803 else 804 op = BUS_DMASYNC_POSTWRITE; 805 bus_dmamap_sync(ahb->buffer_dmat, ecb->dmamap, op); 806 bus_dmamap_unload(ahb->buffer_dmat, ecb->dmamap); 807 } 808 809 if ((intstat & INTSTAT_MASK) == INTSTAT_ECB_OK) { 810 ccb->ccb_h.status = CAM_REQ_CMP; 811 ccb->csio.resid = 0; 812 } else { 813 ahbprocesserror(ahb, ecb, ccb); 814 } 815 ahbecbfree(ahb, ecb); 816 xpt_done(ccb); 817 } else { 818 /* Non CCB Command */ 819 if ((intstat & INTSTAT_MASK) != INTSTAT_ECB_OK) { 820 device_printf(ahb->dev, "Command 0%x Failed %x:%x:%x\n", 821 ecb->hecb.opcode, 822 *((u_int16_t*)&ecb->status), 823 ecb->status.ha_status, ecb->status.resid_count); 824 } 825 /* Client owns this ECB and will release it. */ 826 } 827} 828 829/* 830 * Catch an interrupt from the adaptor 831 */ 832static void 833ahbintr(void *arg) 834{ 835 struct ahb_softc *ahb; 836 837 ahb = arg; 838 mtx_lock(&ahb->lock); 839 ahbintr_locked(ahb); 840 mtx_unlock(&ahb->lock); 841} 842 843static void 844ahbintr_locked(struct ahb_softc *ahb) 845{ 846 u_int intstat; 847 u_int32_t mbox; 848 849 while (ahb_inb(ahb, HOSTSTAT) & HOSTSTAT_INTPEND) { 850 /* 851 * Fetch information about this interrupt. 852 */ 853 intstat = ahb_inb(ahb, INTSTAT); 854 mbox = ahb_inl(ahb, MBOXIN0); 855 856 /* 857 * Reset interrupt latch. 858 */ 859 ahb_outb(ahb, CONTROL, CNTRL_CLRINT); 860 861 /* 862 * Process the completed operation 863 */ 864 switch (intstat & INTSTAT_MASK) { 865 case INTSTAT_ECB_OK: 866 case INTSTAT_ECB_CMPWRETRY: 867 case INTSTAT_ECB_CMPWERR: 868 ahbdone(ahb, mbox, intstat); 869 break; 870 case INTSTAT_AEN_OCCURED: 871 if ((intstat & INTSTAT_TARGET_MASK) == ahb->scsi_id) { 872 /* Bus Reset */ 873 xpt_print_path(ahb->path); 874 switch (mbox) { 875 case HS_SCSI_RESET_ADAPTER: 876 printf("Host Adapter Initiated " 877 "Bus Reset occurred\n"); 878 break; 879 case HS_SCSI_RESET_INCOMING: 880 printf("Bus Reset Initiated " 881 "by another device occurred\n"); 882 break; 883 } 884 /* Notify the XPT */ 885 xpt_async(AC_BUS_RESET, ahb->path, NULL); 886 break; 887 } 888 printf("Unsupported initiator selection AEN occurred\n"); 889 break; 890 case INTSTAT_IMMED_OK: 891 case INTSTAT_IMMED_ERR: 892 ahbhandleimmed(ahb, mbox, intstat); 893 break; 894 case INTSTAT_HW_ERR: 895 panic("Unrecoverable hardware Error Occurred\n"); 896 } 897 } 898} 899 900static void 901ahbexecuteecb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error) 902{ 903 struct ecb *ecb; 904 union ccb *ccb; 905 struct ahb_softc *ahb; 906 u_int32_t ecb_paddr; 907 908 ecb = (struct ecb *)arg; 909 ccb = ecb->ccb; 910 ahb = (struct ahb_softc *)ccb->ccb_h.ccb_ahb_ptr; 911 mtx_assert(&ahb->lock, MA_OWNED); 912 913 if (error != 0) { 914 if (error != EFBIG) 915 device_printf(ahb->dev, 916 "Unexepected error 0x%x returned from " 917 "bus_dmamap_load\n", error); 918 if (ccb->ccb_h.status == CAM_REQ_INPROG) { 919 xpt_freeze_devq(ccb->ccb_h.path, /*count*/1); 920 ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN; 921 } 922 ahbecbfree(ahb, ecb); 923 xpt_done(ccb); 924 return; 925 } 926 927 ecb_paddr = ahbecbvtop(ahb, ecb); 928 929 if (nseg != 0) { 930 ahb_sg_t *sg; 931 bus_dma_segment_t *end_seg; 932 bus_dmasync_op_t op; 933 934 end_seg = dm_segs + nseg; 935 936 /* Copy the segments into our SG list */ 937 sg = ecb->sg_list; 938 while (dm_segs < end_seg) { 939 sg->addr = dm_segs->ds_addr; 940 sg->len = dm_segs->ds_len; 941 sg++; 942 dm_segs++; 943 } 944 945 if (nseg > 1) { 946 ecb->hecb.flag_word1 |= FW1_SG_ECB; 947 ecb->hecb.data_ptr = ahbsgpaddr(ecb_paddr); 948 ecb->hecb.data_len = sizeof(ahb_sg_t) * nseg; 949 } else { 950 ecb->hecb.data_ptr = ecb->sg_list->addr; 951 ecb->hecb.data_len = ecb->sg_list->len; 952 } 953 954 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) { 955/* ecb->hecb.flag_word2 |= FW2_DATA_DIR_IN; */ 956 op = BUS_DMASYNC_PREREAD; 957 } else { 958 op = BUS_DMASYNC_PREWRITE; 959 } 960 /* ecb->hecb.flag_word2 |= FW2_CHECK_DATA_DIR; */ 961 962 bus_dmamap_sync(ahb->buffer_dmat, ecb->dmamap, op); 963 964 } else { 965 ecb->hecb.data_ptr = 0; 966 ecb->hecb.data_len = 0; 967 } 968 969 /* 970 * Last time we need to check if this CCB needs to 971 * be aborted. 972 */ 973 if (ccb->ccb_h.status != CAM_REQ_INPROG) { 974 if (nseg != 0) 975 bus_dmamap_unload(ahb->buffer_dmat, ecb->dmamap); 976 ahbecbfree(ahb, ecb); 977 xpt_done(ccb); 978 return; 979 } 980 981 ecb->state = ECB_ACTIVE; 982 ccb->ccb_h.status |= CAM_SIM_QUEUED; 983 LIST_INSERT_HEAD(&ahb->pending_ccbs, &ccb->ccb_h, sim_links.le); 984 985 /* Tell the adapter about this command */ 986 ahbqueuembox(ahb, ecb_paddr, ATTN_STARTECB|ccb->ccb_h.target_id); 987 988 callout_reset_sbt(&ecb->timer, SBT_1MS * ccb->ccb_h.timeout, 0, 989 ahbtimeout, ecb, 0); 990} 991 992static void 993ahbaction(struct cam_sim *sim, union ccb *ccb) 994{ 995 struct ahb_softc *ahb; 996 997 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("ahbaction\n")); 998 999 ahb = (struct ahb_softc *)cam_sim_softc(sim); 1000 mtx_assert(&ahb->lock, MA_OWNED); 1001 1002 switch (ccb->ccb_h.func_code) { 1003 /* Common cases first */ 1004 case XPT_SCSI_IO: /* Execute the requested I/O operation */ 1005 { 1006 struct ecb *ecb; 1007 struct hardware_ecb *hecb; 1008 int error; 1009 1010 /* 1011 * get an ecb to use. 1012 */ 1013 if ((ecb = ahbecbget(ahb)) == NULL) { 1014 /* Should never occur */ 1015 panic("Failed to get an ecb"); 1016 } 1017 1018 /* 1019 * So we can find the ECB when an abort is requested 1020 */ 1021 ecb->ccb = ccb; 1022 ccb->ccb_h.ccb_ecb_ptr = ecb; 1023 ccb->ccb_h.ccb_ahb_ptr = ahb; 1024 1025 /* 1026 * Put all the arguments for the xfer in the ecb 1027 */ 1028 hecb = &ecb->hecb; 1029 hecb->opcode = ECBOP_INITIATOR_SCSI_CMD; 1030 hecb->flag_word1 = FW1_AUTO_REQUEST_SENSE 1031 | FW1_ERR_STATUS_BLK_ONLY; 1032 hecb->flag_word2 = ccb->ccb_h.target_lun 1033 | FW2_NO_RETRY_ON_BUSY; 1034 if ((ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) != 0) { 1035 hecb->flag_word2 |= FW2_TAG_ENB 1036 | ((ccb->csio.tag_action & 0x3) 1037 << FW2_TAG_TYPE_SHIFT); 1038 } 1039 if ((ccb->ccb_h.flags & CAM_DIS_DISCONNECT) != 0) 1040 hecb->flag_word2 |= FW2_DISABLE_DISC; 1041 hecb->sense_len = ccb->csio.sense_len; 1042 hecb->cdb_len = ccb->csio.cdb_len; 1043 if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0) { 1044 if ((ccb->ccb_h.flags & CAM_CDB_PHYS) == 0) { 1045 bcopy(ccb->csio.cdb_io.cdb_ptr, 1046 hecb->cdb, hecb->cdb_len); 1047 } else { 1048 /* I guess I could map it in... */ 1049 ccb->ccb_h.status = CAM_REQ_INVALID; 1050 ahbecbfree(ahb, ecb); 1051 xpt_done(ccb); 1052 return; 1053 } 1054 } else { 1055 bcopy(ccb->csio.cdb_io.cdb_bytes, 1056 hecb->cdb, hecb->cdb_len); 1057 } 1058 1059 error = bus_dmamap_load_ccb( 1060 ahb->buffer_dmat, 1061 ecb->dmamap, 1062 ccb, 1063 ahbexecuteecb, 1064 ecb, /*flags*/0); 1065 if (error == EINPROGRESS) { 1066 /* 1067 * So as to maintain ordering, freeze the controller 1068 * queue until our mapping is returned. 1069 */ 1070 xpt_freeze_simq(ahb->sim, 1); 1071 ccb->ccb_h.status |= CAM_RELEASE_SIMQ; 1072 } 1073 break; 1074 } 1075 case XPT_EN_LUN: /* Enable LUN as a target */ 1076 case XPT_TARGET_IO: /* Execute target I/O request */ 1077 case XPT_ACCEPT_TARGET_IO: /* Accept Host Target Mode CDB */ 1078 case XPT_CONT_TARGET_IO: /* Continue Host Target I/O Connection*/ 1079 case XPT_ABORT: /* Abort the specified CCB */ 1080 /* XXX Implement */ 1081 ccb->ccb_h.status = CAM_REQ_INVALID; 1082 xpt_done(ccb); 1083 break; 1084 case XPT_SET_TRAN_SETTINGS: 1085 { 1086 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 1087 xpt_done(ccb); 1088 break; 1089 } 1090 case XPT_GET_TRAN_SETTINGS: 1091 /* Get default/user set transfer settings for the target */ 1092 { 1093 struct ccb_trans_settings *cts = &ccb->cts; 1094 u_int target_mask = 0x01 << ccb->ccb_h.target_id; 1095 struct ccb_trans_settings_scsi *scsi = 1096 &cts->proto_specific.scsi; 1097 struct ccb_trans_settings_spi *spi = 1098 &cts->xport_specific.spi; 1099 1100 if (cts->type == CTS_TYPE_USER_SETTINGS) { 1101 cts->protocol = PROTO_SCSI; 1102 cts->protocol_version = SCSI_REV_2; 1103 cts->transport = XPORT_SPI; 1104 cts->transport_version = 2; 1105 1106 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 1107 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; 1108 if ((ahb->disc_permitted & target_mask) != 0) 1109 spi->flags |= CTS_SPI_FLAGS_DISC_ENB; 1110 if ((ahb->tags_permitted & target_mask) != 0) 1111 scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB; 1112 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT; 1113 spi->sync_period = 25; /* 10MHz */ 1114 1115 if (spi->sync_period != 0) 1116 spi->sync_offset = 15; 1117 1118 spi->valid = CTS_SPI_VALID_SYNC_RATE 1119 | CTS_SPI_VALID_SYNC_OFFSET 1120 | CTS_SPI_VALID_BUS_WIDTH 1121 | CTS_SPI_VALID_DISC; 1122 scsi->valid = CTS_SCSI_VALID_TQ; 1123 ccb->ccb_h.status = CAM_REQ_CMP; 1124 } else { 1125 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 1126 } 1127 xpt_done(ccb); 1128 break; 1129 } 1130 case XPT_RESET_DEV: /* Bus Device Reset the specified SCSI device */ 1131 { 1132 int i; 1133 1134 ahb->immed_cmd = IMMED_RESET; 1135 ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ccb->ccb_h.target_id); 1136 /* Poll for interrupt completion */ 1137 for (i = 1000; ahb->immed_cmd != 0 && i != 0; i--) { 1138 DELAY(1000); 1139 ahbintr_locked(cam_sim_softc(sim)); 1140 } 1141 break; 1142 } 1143 case XPT_CALC_GEOMETRY: 1144 { 1145 cam_calc_geometry(&ccb->ccg, ahb->extended_trans); 1146 xpt_done(ccb); 1147 break; 1148 } 1149 case XPT_RESET_BUS: /* Reset the specified SCSI bus */ 1150 { 1151 int i; 1152 1153 ahb->immed_cmd = IMMED_RESET; 1154 ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ahb->scsi_id); 1155 /* Poll for interrupt completion */ 1156 for (i = 1000; ahb->immed_cmd != 0 && i != 0; i--) 1157 DELAY(1000); 1158 ccb->ccb_h.status = CAM_REQ_CMP; 1159 xpt_done(ccb); 1160 break; 1161 } 1162 case XPT_TERM_IO: /* Terminate the I/O process */ 1163 /* XXX Implement */ 1164 ccb->ccb_h.status = CAM_REQ_INVALID; 1165 xpt_done(ccb); 1166 break; 1167 case XPT_PATH_INQ: /* Path routing inquiry */ 1168 { 1169 struct ccb_pathinq *cpi = &ccb->cpi; 1170 1171 cpi->version_num = 1; /* XXX??? */ 1172 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE; 1173 cpi->target_sprt = 0; 1174 cpi->hba_misc = 0; 1175 cpi->hba_eng_cnt = 0; 1176 cpi->max_target = 7; 1177 cpi->max_lun = 7; 1178 cpi->initiator_id = ahb->scsi_id; 1179 cpi->bus_id = cam_sim_bus(sim); 1180 cpi->base_transfer_speed = 3300; 1181 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 1182 strncpy(cpi->hba_vid, "Adaptec", HBA_IDLEN); 1183 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN); 1184 cpi->unit_number = cam_sim_unit(sim); 1185 cpi->transport = XPORT_SPI; 1186 cpi->transport_version = 2; 1187 cpi->protocol = PROTO_SCSI; 1188 cpi->protocol_version = SCSI_REV_2; 1189 cpi->ccb_h.status = CAM_REQ_CMP; 1190 xpt_done(ccb); 1191 break; 1192 } 1193#if 0 1194 /* Need these??? */ 1195 case XPT_IMMED_NOTIFY: /* Notify Host Target driver of event */ 1196 case XPT_NOTIFY_ACK: /* Acknowledgement of event */ 1197#endif 1198 default: 1199 ccb->ccb_h.status = CAM_REQ_INVALID; 1200 xpt_done(ccb); 1201 break; 1202 } 1203} 1204 1205static void 1206ahbpoll(struct cam_sim *sim) 1207{ 1208 ahbintr(cam_sim_softc(sim)); 1209} 1210 1211static void 1212ahbtimeout(void *arg) 1213{ 1214 struct ecb *ecb; 1215 union ccb *ccb; 1216 struct ahb_softc *ahb; 1217 1218 ecb = (struct ecb *)arg; 1219 ccb = ecb->ccb; 1220 ahb = (struct ahb_softc *)ccb->ccb_h.ccb_ahb_ptr; 1221 mtx_assert(&ahb->lock, MA_OWNED); 1222 xpt_print_path(ccb->ccb_h.path); 1223 printf("ECB %p - timed out\n", (void *)ecb); 1224 1225 if ((ecb->state & ECB_ACTIVE) == 0) { 1226 xpt_print_path(ccb->ccb_h.path); 1227 printf("ECB %p - timed out ECB already completed\n", 1228 (void *)ecb); 1229 return; 1230 } 1231 /* 1232 * In order to simplify the recovery process, we ask the XPT 1233 * layer to halt the queue of new transactions and we traverse 1234 * the list of pending CCBs and remove their timeouts. This 1235 * means that the driver attempts to clear only one error 1236 * condition at a time. In general, timeouts that occur 1237 * close together are related anyway, so there is no benefit 1238 * in attempting to handle errors in parallel. Timeouts will 1239 * be reinstated when the recovery process ends. 1240 */ 1241 if ((ecb->state & ECB_DEVICE_RESET) == 0) { 1242 struct ccb_hdr *ccb_h; 1243 1244 if ((ecb->state & ECB_RELEASE_SIMQ) == 0) { 1245 xpt_freeze_simq(ahb->sim, /*count*/1); 1246 ecb->state |= ECB_RELEASE_SIMQ; 1247 } 1248 1249 LIST_FOREACH(ccb_h, &ahb->pending_ccbs, sim_links.le) { 1250 struct ecb *pending_ecb; 1251 1252 pending_ecb = (struct ecb *)ccb_h->ccb_ecb_ptr; 1253 callout_stop(&pending_ecb->timer); 1254 } 1255 1256 /* Store for our interrupt handler */ 1257 ahb->immed_ecb = ecb; 1258 1259 /* 1260 * Send a Bus Device Reset message: 1261 * The target that is holding up the bus may not 1262 * be the same as the one that triggered this timeout 1263 * (different commands have different timeout lengths), 1264 * but we have no way of determining this from our 1265 * timeout handler. Our strategy here is to queue a 1266 * BDR message to the target of the timed out command. 1267 * If this fails, we'll get another timeout 2 seconds 1268 * later which will attempt a bus reset. 1269 */ 1270 xpt_print_path(ccb->ccb_h.path); 1271 printf("Queuing BDR\n"); 1272 ecb->state |= ECB_DEVICE_RESET; 1273 callout_reset(&ecb->timer, 2 * hz, ahbtimeout, ecb); 1274 1275 ahb->immed_cmd = IMMED_RESET; 1276 ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ccb->ccb_h.target_id); 1277 } else if ((ecb->state & ECB_SCSIBUS_RESET) != 0) { 1278 /* 1279 * Try a SCSI bus reset. We do this only if we 1280 * have already attempted to clear the condition with a BDR. 1281 */ 1282 xpt_print_path(ccb->ccb_h.path); 1283 printf("Attempting SCSI Bus reset\n"); 1284 ecb->state |= ECB_SCSIBUS_RESET; 1285 callout_reset(&ecb->timer, 2 * hz, ahbtimeout, ecb); 1286 ahb->immed_cmd = IMMED_RESET; 1287 ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ahb->scsi_id); 1288 } else { 1289 /* Bring out the hammer... */ 1290 ahbreset(ahb); 1291 1292 /* Simulate the reset complete interrupt */ 1293 ahbhandleimmed(ahb, 0, ahb->scsi_id|INTSTAT_IMMED_OK); 1294 } 1295} 1296 1297static device_method_t ahb_eisa_methods[] = { 1298 /* Device interface */ 1299 DEVMETHOD(device_probe, ahbprobe), 1300 DEVMETHOD(device_attach, ahbattach), 1301 1302 { 0, 0 } 1303}; 1304 1305static driver_t ahb_eisa_driver = { 1306 "ahb", 1307 ahb_eisa_methods, 1308 sizeof(struct ahb_softc), 1309}; 1310 1311static devclass_t ahb_devclass; 1312 1313DRIVER_MODULE(ahb, eisa, ahb_eisa_driver, ahb_devclass, 0, 0); 1314MODULE_DEPEND(ahb, eisa, 1, 1, 1); 1315MODULE_DEPEND(ahb, cam, 1, 1, 1); 1316