Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/dev/ata/atapi-cam.c
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1 /*- 2 * Copyright (c) 2001-2007 Thomas Quinot <thomas@cuivre.fr.eu.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer, 10 * without modification, immediately at the beginning of the file. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/bus.h> 35 #include <sys/kernel.h> 36 #include <sys/malloc.h> 37 #include <sys/ata.h> 38 #include <sys/taskqueue.h> 39 #include <sys/lock.h> 40 #include <sys/mutex.h> 41 #include <sys/sema.h> 42 #include <vm/uma.h> 43 #include <machine/resource.h> 44 #include <machine/bus.h> 45 46 #include <cam/cam.h> 47 #include <cam/cam_ccb.h> 48 #include <cam/cam_periph.h> 49 #include <cam/cam_sim.h> 50 #include <cam/cam_xpt_sim.h> 51 #include <cam/cam_debug.h> 52 #include <cam/scsi/scsi_all.h> 53 54 #include <dev/ata/ata-all.h> 55 #include <ata_if.h> 56 57 /* private data associated with an ATA bus */ 58 struct atapi_xpt_softc { 59 struct ata_device atapi_cam_dev; /* must be first */ 60 device_t dev; 61 device_t parent; 62 struct ata_channel *ata_ch; 63 struct cam_path *path; 64 struct cam_sim *sim; 65 int flags; 66 #define BUS_REGISTERED 0x01 67 #define RESOURCE_SHORTAGE 0x02 68 #define DETACHING 0x04 69 70 TAILQ_HEAD(,atapi_hcb) pending_hcbs; 71 struct ata_device *atadev[2]; 72 struct mtx state_lock; 73 }; 74 75 /* hardware command descriptor block */ 76 struct atapi_hcb { 77 struct atapi_xpt_softc *softc; 78 int unit; 79 int bus; 80 int target; 81 int lun; 82 union ccb *ccb; 83 int flags; 84 #define QUEUED 0x0001 85 #define AUTOSENSE 0x0002 86 char *dxfer_alloc; 87 TAILQ_ENTRY(atapi_hcb) chain; 88 }; 89 90 enum reinit_reason { BOOT_ATTACH, ATTACH, RESET }; 91 92 /* Device methods */ 93 static void atapi_cam_identify(driver_t *dev, device_t parent); 94 static int atapi_cam_probe(device_t dev); 95 static int atapi_cam_attach(device_t dev); 96 static int atapi_cam_detach(device_t dev); 97 static int atapi_cam_reinit(device_t dev); 98 99 /* CAM XPT methods */ 100 static void atapi_action(struct cam_sim *, union ccb *); 101 static void atapi_poll(struct cam_sim *); 102 static void atapi_async(void *, u_int32_t, struct cam_path *, void *); 103 static void atapi_cb(struct ata_request *); 104 105 /* Module methods */ 106 static int atapi_cam_event_handler(module_t mod, int what, void *arg); 107 108 /* internal functions */ 109 static void reinit_bus(struct atapi_xpt_softc *scp, enum reinit_reason reason); 110 static void setup_async_cb(struct atapi_xpt_softc *, uint32_t); 111 static void cam_rescan(struct cam_sim *); 112 static void free_hcb_and_ccb_done(struct atapi_hcb *, u_int32_t); 113 static struct atapi_hcb *allocate_hcb(struct atapi_xpt_softc *, int, int, union ccb *); 114 static void free_hcb(struct atapi_hcb *hcb); 115 static void free_softc(struct atapi_xpt_softc *scp); 116 117 static MALLOC_DEFINE(M_ATACAM, "ata_cam", "ATA driver CAM-XPT layer"); 118 119 static device_method_t atapi_cam_methods[] = { 120 DEVMETHOD(device_identify, atapi_cam_identify), 121 DEVMETHOD(device_probe, atapi_cam_probe), 122 DEVMETHOD(device_attach, atapi_cam_attach), 123 DEVMETHOD(device_detach, atapi_cam_detach), 124 DEVMETHOD(ata_reinit, atapi_cam_reinit), 125 DEVMETHOD_END 126 }; 127 128 static driver_t atapi_cam_driver = { 129 "atapicam", 130 atapi_cam_methods, 131 sizeof(struct atapi_xpt_softc) 132 }; 133 134 static devclass_t atapi_cam_devclass; 135 DRIVER_MODULE(atapicam, ata, 136 atapi_cam_driver, 137 atapi_cam_devclass, 138 atapi_cam_event_handler, 139 /*arg*/NULL); 140 MODULE_VERSION(atapicam, 1); 141 MODULE_DEPEND(atapicam, ata, 1, 1, 1); 142 MODULE_DEPEND(atapicam, cam, 1, 1, 1); 143 144 static void 145 atapi_cam_identify(driver_t *driver, device_t parent) 146 { 147 struct atapi_xpt_softc *scp = 148 malloc (sizeof (struct atapi_xpt_softc), M_ATACAM, M_NOWAIT|M_ZERO); 149 device_t child; 150 151 if (scp == NULL) { 152 printf ("atapi_cam_identify: out of memory"); 153 return; 154 } 155 156 /* Assume one atapicam instance per parent channel instance. */ 157 child = device_add_child(parent, "atapicam", -1); 158 if (child == NULL) { 159 printf ("atapi_cam_identify: out of memory, can't add child"); 160 free (scp, M_ATACAM); 161 return; 162 } 163 scp->atapi_cam_dev.unit = -1; 164 scp->atapi_cam_dev.dev = child; 165 device_quiet(child); 166 device_set_softc(child, scp); 167 } 168 169 static int 170 atapi_cam_probe(device_t dev) 171 { 172 struct ata_device *atadev = device_get_softc (dev); 173 174 KASSERT(atadev != NULL, ("expect valid struct ata_device")); 175 if (atadev->unit < 0) { 176 device_set_desc(dev, "ATAPI CAM Attachment"); 177 return (0); 178 } else { 179 return ENXIO; 180 } 181 } 182 183 static int 184 atapi_cam_attach(device_t dev) 185 { 186 struct atapi_xpt_softc *scp = NULL; 187 struct cam_devq *devq = NULL; 188 struct cam_sim *sim = NULL; 189 struct cam_path *path = NULL; 190 int unit, error; 191 192 scp = (struct atapi_xpt_softc *)device_get_softc(dev); 193 if (scp == NULL) { 194 device_printf(dev, "Cannot get softc\n"); 195 return (ENOMEM); 196 } 197 198 mtx_init(&scp->state_lock, "ATAPICAM lock", NULL, MTX_DEF); 199 200 scp->dev = dev; 201 scp->parent = device_get_parent(dev); 202 scp->ata_ch = device_get_softc(scp->parent); 203 TAILQ_INIT(&scp->pending_hcbs); 204 unit = device_get_unit(device_get_parent(dev)); 205 206 if ((devq = cam_simq_alloc(16)) == NULL) { 207 error = ENOMEM; 208 goto out; 209 } 210 211 if ((sim = cam_sim_alloc(atapi_action, atapi_poll, "ata", 212 (void *)scp, unit, &scp->state_lock, 1, 1, devq)) == NULL) { 213 error = ENOMEM; 214 goto out; 215 } 216 scp->sim = sim; 217 218 mtx_lock(&scp->state_lock); 219 if (xpt_bus_register(sim, dev, 0) != CAM_SUCCESS) { 220 error = EINVAL; 221 mtx_unlock(&scp->state_lock); 222 goto out; 223 } 224 scp->flags |= BUS_REGISTERED; 225 226 if (xpt_create_path(&path, /*periph*/ NULL, 227 cam_sim_path(sim), CAM_TARGET_WILDCARD, 228 CAM_LUN_WILDCARD) != CAM_REQ_CMP) { 229 error = ENOMEM; 230 mtx_unlock(&scp->state_lock); 231 goto out; 232 } 233 scp->path = path; 234 235 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("Registered SIM for ata%d\n", unit)); 236 237 setup_async_cb(scp, AC_LOST_DEVICE); 238 reinit_bus(scp, cold ? BOOT_ATTACH : ATTACH); 239 error = 0; 240 mtx_unlock(&scp->state_lock); 241 242 out: 243 if (error != 0) 244 free_softc(scp); 245 246 return (error); 247 } 248 249 static int 250 atapi_cam_detach(device_t dev) 251 { 252 struct atapi_xpt_softc *scp = device_get_softc(dev); 253 254 mtx_lock(&scp->state_lock); 255 if (xpt_sim_opened(scp->sim)) { 256 mtx_unlock(&scp->state_lock); 257 return (EBUSY); 258 } 259 xpt_freeze_simq(scp->sim, 1 /*count*/); 260 scp->flags |= DETACHING; 261 mtx_unlock(&scp->state_lock); 262 free_softc(scp); 263 return (0); 264 } 265 266 static int 267 atapi_cam_reinit(device_t dev) { 268 struct atapi_xpt_softc *scp = device_get_softc(dev); 269 270 /* 271 * scp might be null if the bus is being reinitialised during 272 * the boot-up sequence, before the ATAPI bus is registered. 273 */ 274 275 if (scp != NULL) { 276 mtx_lock(&scp->state_lock); 277 reinit_bus(scp, RESET); 278 mtx_unlock(&scp->state_lock); 279 } 280 return (0); 281 } 282 283 static void 284 reinit_bus(struct atapi_xpt_softc *scp, enum reinit_reason reason) { 285 struct ata_device *old_atadev[2], *atadev; 286 device_t *children; 287 int nchildren, i, dev_changed; 288 289 if (device_get_children(scp->parent, &children, &nchildren) != 0) { 290 return; 291 } 292 293 old_atadev[0] = scp->atadev[0]; 294 old_atadev[1] = scp->atadev[1]; 295 scp->atadev[0] = NULL; 296 scp->atadev[1] = NULL; 297 298 for (i = 0; i < nchildren; i++) { 299 /* XXX Does the child need to actually be attached yet? */ 300 if (children[i] != NULL) { 301 atadev = device_get_softc(children[i]); 302 if ((atadev->unit == ATA_MASTER) && 303 (scp->ata_ch->devices & ATA_ATAPI_MASTER) != 0) 304 scp->atadev[0] = atadev; 305 if ((atadev->unit == ATA_SLAVE) && 306 (scp->ata_ch->devices & ATA_ATAPI_SLAVE) != 0) 307 scp->atadev[1] = atadev; 308 } 309 } 310 dev_changed = (old_atadev[0] != scp->atadev[0]) 311 || (old_atadev[1] != scp->atadev[1]); 312 free(children, M_TEMP); 313 314 switch (reason) { 315 case BOOT_ATTACH: 316 case ATTACH: 317 break; 318 case RESET: 319 xpt_async(AC_BUS_RESET, scp->path, NULL); 320 321 if (!dev_changed) 322 break; 323 324 cam_rescan(scp->sim); 325 break; 326 } 327 } 328 329 static void 330 setup_async_cb(struct atapi_xpt_softc *scp, uint32_t events) 331 { 332 struct ccb_setasync csa; 333 334 xpt_setup_ccb(&csa.ccb_h, scp->path, /*priority*/ 5); 335 csa.ccb_h.func_code = XPT_SASYNC_CB; 336 csa.event_enable = events; 337 csa.callback = &atapi_async; 338 csa.callback_arg = scp->sim; 339 xpt_action((union ccb *) &csa); 340 } 341 342 static void 343 atapi_action(struct cam_sim *sim, union ccb *ccb) 344 { 345 struct atapi_xpt_softc *softc = (struct atapi_xpt_softc*)cam_sim_softc(sim); 346 struct ccb_hdr *ccb_h = &ccb->ccb_h; 347 struct atapi_hcb *hcb = NULL; 348 struct ata_request *request = NULL; 349 int unit = cam_sim_unit(sim); 350 int bus = cam_sim_bus(sim); 351 int len; 352 char *buf; 353 354 switch (ccb_h->func_code) { 355 case XPT_PATH_INQ: { 356 struct ccb_pathinq *cpi = &ccb->cpi; 357 int tid = ccb_h->target_id; 358 359 cpi->version_num = 1; 360 cpi->hba_inquiry = 0; 361 cpi->target_sprt = 0; 362 cpi->hba_misc = PIM_NO_6_BYTE; 363 cpi->hba_eng_cnt = 0; 364 bzero(cpi->vuhba_flags, sizeof(cpi->vuhba_flags)); 365 cpi->max_target = 1; 366 cpi->max_lun = 0; 367 cpi->async_flags = 0; 368 cpi->hpath_id = 0; 369 cpi->initiator_id = 7; 370 strncpy(cpi->sim_vid, "FreeBSD", sizeof(cpi->sim_vid)); 371 strncpy(cpi->hba_vid, "ATAPI", sizeof(cpi->hba_vid)); 372 strncpy(cpi->dev_name, cam_sim_name(sim), sizeof cpi->dev_name); 373 cpi->unit_number = cam_sim_unit(sim); 374 cpi->bus_id = cam_sim_bus(sim); 375 cpi->base_transfer_speed = 3300; 376 cpi->transport = XPORT_SPI; 377 cpi->transport_version = 2; 378 cpi->protocol = PROTO_SCSI; 379 cpi->protocol_version = SCSI_REV_2; 380 381 if (softc->ata_ch && tid != CAM_TARGET_WILDCARD) { 382 if (softc->atadev[tid] == NULL) { 383 ccb->ccb_h.status = CAM_DEV_NOT_THERE; 384 xpt_done(ccb); 385 return; 386 } 387 switch (softc->atadev[ccb_h->target_id]->mode) { 388 case ATA_PIO1: 389 cpi->base_transfer_speed = 5200; 390 break; 391 case ATA_PIO2: 392 cpi->base_transfer_speed = 7000; 393 break; 394 case ATA_PIO3: 395 cpi->base_transfer_speed = 11000; 396 break; 397 case ATA_PIO4: 398 case ATA_DMA: 399 case ATA_WDMA2: 400 cpi->base_transfer_speed = 16000; 401 break; 402 case ATA_UDMA2: 403 cpi->base_transfer_speed = 33000; 404 break; 405 case ATA_UDMA4: 406 cpi->base_transfer_speed = 66000; 407 break; 408 case ATA_UDMA5: 409 cpi->base_transfer_speed = 100000; 410 break; 411 case ATA_UDMA6: 412 cpi->base_transfer_speed = 133000; 413 break; 414 case ATA_SA150: 415 cpi->base_transfer_speed = 150000; 416 break; 417 case ATA_SA300: 418 cpi->base_transfer_speed = 300000; 419 break; 420 default: 421 break; 422 } 423 } 424 cpi->maxio = softc->ata_ch->dma.max_iosize ? 425 softc->ata_ch->dma.max_iosize : DFLTPHYS; 426 ccb->ccb_h.status = CAM_REQ_CMP; 427 xpt_done(ccb); 428 return; 429 } 430 431 case XPT_RESET_DEV: { 432 int tid = ccb_h->target_id; 433 434 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("dev reset\n")); 435 mtx_unlock(&softc->state_lock); 436 ata_controlcmd(softc->atadev[tid]->dev, ATA_DEVICE_RESET, 0, 0, 0); 437 mtx_lock(&softc->state_lock); 438 ccb->ccb_h.status = CAM_REQ_CMP; 439 xpt_done(ccb); 440 return; 441 } 442 443 case XPT_RESET_BUS: 444 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("bus reset\n")); 445 mtx_unlock(&softc->state_lock); 446 ata_reinit(softc->parent); 447 mtx_lock(&softc->state_lock); 448 ccb->ccb_h.status = CAM_REQ_CMP; 449 xpt_done(ccb); 450 return; 451 452 case XPT_SET_TRAN_SETTINGS: 453 /* ignore these, we're not doing SCSI here */ 454 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, 455 ("SET_TRAN_SETTINGS not supported\n")); 456 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 457 xpt_done(ccb); 458 return; 459 460 case XPT_GET_TRAN_SETTINGS: { 461 struct ccb_trans_settings *cts = &ccb->cts; 462 cts->protocol = PROTO_SCSI; 463 cts->protocol_version = SCSI_REV_2; 464 cts->transport = XPORT_SPI; 465 cts->transport_version = XPORT_VERSION_UNSPECIFIED; 466 cts->proto_specific.valid = 0; 467 cts->xport_specific.valid = 0; 468 /* nothing more to do */ 469 ccb->ccb_h.status = CAM_REQ_CMP; 470 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("GET_TRAN_SETTINGS\n")); 471 xpt_done(ccb); 472 return; 473 } 474 475 case XPT_CALC_GEOMETRY: { 476 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("CALC_GEOMETRY\n")); 477 cam_calc_geometry(&ccb->ccg, /*extended*/1); 478 xpt_done(ccb); 479 return; 480 } 481 482 case XPT_SCSI_IO: { 483 struct ccb_scsiio *csio = &ccb->csio; 484 int tid = ccb_h->target_id, lid = ccb_h->target_lun; 485 int request_flags = ATA_R_ATAPI; 486 487 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, ("XPT_SCSI_IO\n")); 488 489 if (softc->flags & DETACHING) { 490 ccb->ccb_h.status = CAM_REQ_ABORTED; 491 xpt_done(ccb); 492 return; 493 } 494 495 if (softc->atadev[tid] == NULL) { 496 ccb->ccb_h.status = CAM_DEV_NOT_THERE; 497 xpt_done(ccb); 498 return; 499 } 500 501 /* check that this request was not aborted already */ 502 if ((ccb_h->status & CAM_STATUS_MASK) != CAM_REQ_INPROG) { 503 printf("XPT_SCSI_IO received but already in progress?\n"); 504 xpt_done(ccb); 505 return; 506 } 507 if (lid > 0) { 508 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, 509 ("SCSI IO received for invalid lun %d\n", lid)); 510 goto action_invalid; 511 } 512 if (csio->cdb_len > sizeof request->u.atapi.ccb) { 513 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, 514 ("CAM CCB too long for ATAPI")); 515 goto action_invalid; 516 } 517 518 switch (ccb_h->flags & CAM_DIR_MASK) { 519 case CAM_DIR_IN: 520 request_flags |= ATA_R_READ; 521 break; 522 case CAM_DIR_OUT: 523 request_flags |= ATA_R_WRITE; 524 break; 525 case CAM_DIR_NONE: 526 /* No flags need to be set */ 527 break; 528 default: 529 device_printf(softc->dev, "unknown IO operation\n"); 530 goto action_invalid; 531 } 532 533 if ((hcb = allocate_hcb(softc, unit, bus, ccb)) == NULL) { 534 printf("cannot allocate ATAPI/CAM hcb\n"); 535 goto action_oom; 536 } 537 if ((request = ata_alloc_request()) == NULL) { 538 printf("cannot allocate ATAPI/CAM request\n"); 539 goto action_oom; 540 } 541 542 bcopy((ccb_h->flags & CAM_CDB_POINTER) ? 543 csio->cdb_io.cdb_ptr : csio->cdb_io.cdb_bytes, 544 request->u.atapi.ccb, csio->cdb_len); 545 #ifdef CAMDEBUG 546 if (CAM_DEBUGGED(ccb_h->path, CAM_DEBUG_CDB)) { 547 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 548 549 printf("atapi_action: hcb@%p: %s\n", hcb, 550 scsi_cdb_string(request->u.atapi.ccb, cdb_str, sizeof(cdb_str))); 551 } 552 if (CAM_DEBUGGED(ccb_h->path, CAM_DEBUG_SUBTRACE)) { 553 request_flags |= ATA_R_DEBUG; 554 } 555 #endif 556 557 len = csio->dxfer_len; 558 buf = csio->data_ptr; 559 560 /* some SCSI commands require special processing */ 561 switch (request->u.atapi.ccb[0]) { 562 case INQUIRY: { 563 /* 564 * many ATAPI devices seem to report more than 565 * SHORT_INQUIRY_LENGTH bytes of available INQUIRY 566 * information, but respond with some incorrect condition 567 * when actually asked for it, so we are going to pretend 568 * that only SHORT_INQUIRY_LENGTH are expected, anyway. 569 */ 570 struct scsi_inquiry *inq = (struct scsi_inquiry *) &request->u.atapi.ccb[0]; 571 572 if (inq->byte2 == 0 && inq->page_code == 0 && 573 scsi_2btoul(inq->length) > SHORT_INQUIRY_LENGTH) { 574 bzero(buf, len); 575 len = SHORT_INQUIRY_LENGTH; 576 scsi_ulto2b(len, inq->length); 577 } 578 break; 579 } 580 case READ_6: 581 /* FALLTHROUGH */ 582 583 case WRITE_6: 584 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, 585 ("Translating %s into _10 equivalent\n", 586 (request->u.atapi.ccb[0] == READ_6) ? "READ_6" : "WRITE_6")); 587 request->u.atapi.ccb[0] |= 0x20; 588 request->u.atapi.ccb[9] = request->u.atapi.ccb[5]; 589 request->u.atapi.ccb[8] = request->u.atapi.ccb[4]; 590 request->u.atapi.ccb[7] = 0; 591 request->u.atapi.ccb[6] = 0; 592 request->u.atapi.ccb[5] = request->u.atapi.ccb[3]; 593 request->u.atapi.ccb[4] = request->u.atapi.ccb[2]; 594 request->u.atapi.ccb[3] = request->u.atapi.ccb[1] & 0x1f; 595 request->u.atapi.ccb[2] = 0; 596 request->u.atapi.ccb[1] = 0; 597 /* FALLTHROUGH */ 598 599 case READ_10: 600 /* FALLTHROUGH */ 601 case WRITE_10: 602 /* FALLTHROUGH */ 603 case READ_12: 604 /* FALLTHROUGH */ 605 case WRITE_12: 606 /* 607 * Enable DMA (if target supports it) for READ and WRITE commands 608 * only, as some combinations of drive, controller and chipset do 609 * not behave correctly when DMA is enabled for other commands. 610 */ 611 if (softc->atadev[tid]->mode >= ATA_DMA) 612 request_flags |= ATA_R_DMA; 613 break; 614 615 } 616 617 if ((ccb_h->flags & CAM_DIR_MASK) == CAM_DIR_IN && (len & 1)) { 618 /* ATA always transfers an even number of bytes */ 619 if ((buf = hcb->dxfer_alloc 620 = malloc(++len, M_ATACAM, M_NOWAIT | M_ZERO)) == NULL) { 621 printf("cannot allocate ATAPI/CAM buffer\n"); 622 goto action_oom; 623 } 624 } 625 request->dev = softc->atadev[tid]->dev; 626 request->driver = hcb; 627 request->data = buf; 628 request->bytecount = len; 629 request->transfersize = min(request->bytecount, 65534); 630 request->timeout = (ccb_h->timeout + 999) / 1000; 631 request->callback = &atapi_cb; 632 request->flags = request_flags; 633 634 /* 635 * no retries are to be performed at the ATA level; any retries 636 * will be done by CAM. 637 */ 638 request->retries = 0; 639 640 TAILQ_INSERT_TAIL(&softc->pending_hcbs, hcb, chain); 641 hcb->flags |= QUEUED; 642 ccb_h->status |= CAM_SIM_QUEUED; 643 mtx_unlock(&softc->state_lock); 644 645 ata_queue_request(request); 646 mtx_lock(&softc->state_lock); 647 return; 648 } 649 650 default: 651 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, 652 ("unsupported function code 0x%02x\n", ccb_h->func_code)); 653 goto action_invalid; 654 } 655 656 /* NOTREACHED */ 657 658 action_oom: 659 if (request != NULL) 660 ata_free_request(request); 661 if (hcb != NULL) 662 free_hcb(hcb); 663 xpt_print_path(ccb_h->path); 664 printf("out of memory, freezing queue.\n"); 665 softc->flags |= RESOURCE_SHORTAGE; 666 xpt_freeze_simq(sim, /*count*/ 1); 667 ccb_h->status = CAM_REQUEUE_REQ; 668 xpt_done(ccb); 669 return; 670 671 action_invalid: 672 ccb_h->status = CAM_REQ_INVALID; 673 xpt_done(ccb); 674 return; 675 } 676 677 static void 678 atapi_poll(struct cam_sim *sim) 679 { 680 struct atapi_xpt_softc *softc = 681 (struct atapi_xpt_softc*)cam_sim_softc(sim); 682 683 mtx_unlock(&softc->state_lock); 684 ata_interrupt(softc->ata_ch); 685 mtx_lock(&softc->state_lock); 686 } 687 688 static void 689 atapi_cb(struct ata_request *request) 690 { 691 struct atapi_xpt_softc *scp; 692 struct atapi_hcb *hcb; 693 struct ccb_scsiio *csio; 694 u_int32_t rc; 695 696 hcb = (struct atapi_hcb *)request->driver; 697 scp = hcb->softc; 698 csio = &hcb->ccb->csio; 699 700 #ifdef CAMDEBUG 701 # define err (request->u.atapi.sense.key) 702 if (CAM_DEBUGGED(csio->ccb_h.path, CAM_DEBUG_CDB)) { 703 printf("atapi_cb: hcb@%p sense = %02x: sk = %01x%s%s%s\n", 704 hcb, err, err & 0x0f, 705 (err & 0x80) ? ", Filemark" : "", 706 (err & 0x40) ? ", EOM" : "", 707 (err & 0x20) ? ", ILI" : ""); 708 device_printf(request->dev, 709 "cmd %s status %02x result %02x error %02x\n", 710 ata_cmd2str(request), 711 request->status, request->result, request->error); 712 } 713 #endif 714 715 if ((hcb->flags & AUTOSENSE) != 0) { 716 rc = CAM_SCSI_STATUS_ERROR; 717 if (request->result == 0) { 718 csio->ccb_h.status |= CAM_AUTOSNS_VALID; 719 } 720 } else if (request->result != 0) { 721 if ((request->flags & ATA_R_TIMEOUT) != 0) { 722 rc = CAM_CMD_TIMEOUT; 723 } else { 724 rc = CAM_SCSI_STATUS_ERROR; 725 csio->scsi_status = SCSI_STATUS_CHECK_COND; 726 727 if ((csio->ccb_h.flags & CAM_DIS_AUTOSENSE) == 0) { 728 #if 0 729 static const int8_t ccb[16] = { ATAPI_REQUEST_SENSE, 0, 0, 0, 730 sizeof(struct atapi_sense), 0, 0, 0, 0, 0, 0, 731 0, 0, 0, 0, 0 }; 732 733 bcopy (ccb, request->u.atapi.ccb, sizeof ccb); 734 request->data = (caddr_t)&csio->sense_data; 735 request->bytecount = sizeof(struct atapi_sense); 736 request->transfersize = min(request->bytecount, 65534); 737 request->timeout = (csio->ccb_h.timeout + 999) / 1000; 738 request->retries = 2; 739 request->flags = ATA_R_QUIET|ATA_R_ATAPI|ATA_R_IMMEDIATE; 740 hcb->flags |= AUTOSENSE; 741 742 ata_queue_request(request); 743 return; 744 #else 745 /* 746 * Use auto-sense data from the ATA layer, if it has 747 * issued a REQUEST SENSE automatically and that operation 748 * returned without error. 749 */ 750 if (request->u.atapi.sense.key != 0 && request->error == 0) { 751 bcopy (&request->u.atapi.sense, &csio->sense_data, sizeof(struct atapi_sense)); 752 csio->ccb_h.status |= CAM_AUTOSNS_VALID; 753 } 754 } 755 #endif 756 } 757 } else { 758 rc = CAM_REQ_CMP; 759 csio->scsi_status = SCSI_STATUS_OK; 760 if (((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) && 761 hcb->dxfer_alloc != NULL) 762 { 763 bcopy(hcb->dxfer_alloc, csio->data_ptr, csio->dxfer_len); 764 } 765 } 766 767 mtx_lock(&scp->state_lock); 768 free_hcb_and_ccb_done(hcb, rc); 769 mtx_unlock(&scp->state_lock); 770 771 ata_free_request(request); 772 } 773 774 static void 775 free_hcb_and_ccb_done(struct atapi_hcb *hcb, u_int32_t status) 776 { 777 struct atapi_xpt_softc *softc; 778 union ccb *ccb; 779 780 if (hcb == NULL) 781 return; 782 783 softc = hcb->softc; 784 ccb = hcb->ccb; 785 786 /* we're about to free a hcb, so the shortage has ended */ 787 if (softc->flags & RESOURCE_SHORTAGE) { 788 softc->flags &= ~RESOURCE_SHORTAGE; 789 status |= CAM_RELEASE_SIMQ; 790 } 791 free_hcb(hcb); 792 ccb->ccb_h.status = 793 status | (ccb->ccb_h.status & ~(CAM_STATUS_MASK | CAM_SIM_QUEUED)); 794 xpt_done(ccb); 795 } 796 797 static void 798 atapi_async(void *callback_arg, u_int32_t code, 799 struct cam_path* path, void *arg) 800 { 801 int targ; 802 803 GIANT_REQUIRED; 804 805 switch (code) { 806 case AC_LOST_DEVICE: 807 targ = xpt_path_target_id(path); 808 xpt_print_path(path); 809 if (targ == -1) 810 printf("Lost host adapter\n"); 811 else 812 printf("Lost target %d???\n", targ); 813 break; 814 815 default: 816 break; 817 } 818 } 819 820 static void 821 cam_rescan(struct cam_sim *sim) 822 { 823 union ccb *ccb; 824 825 ccb = xpt_alloc_ccb_nowait(); 826 if (ccb == NULL) 827 return; 828 if (xpt_create_path(&ccb->ccb_h.path, NULL, cam_sim_path(sim), 829 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) { 830 xpt_free_ccb(ccb); 831 return; 832 } 833 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("Rescanning ATAPI bus.\n")); 834 xpt_rescan(ccb); 835 /* scan is in progress now */ 836 } 837 838 static struct atapi_hcb * 839 allocate_hcb(struct atapi_xpt_softc *softc, int unit, int bus, union ccb *ccb) 840 { 841 struct atapi_hcb *hcb = (struct atapi_hcb *) 842 malloc(sizeof(struct atapi_hcb), M_ATACAM, M_NOWAIT | M_ZERO); 843 844 if (hcb != NULL) { 845 hcb->softc = softc; 846 hcb->unit = unit; 847 hcb->bus = bus; 848 hcb->ccb = ccb; 849 } 850 return hcb; 851 } 852 853 static void 854 free_hcb(struct atapi_hcb *hcb) 855 { 856 if ((hcb->flags & QUEUED) != 0) 857 TAILQ_REMOVE(&hcb->softc->pending_hcbs, hcb, chain); 858 if (hcb->dxfer_alloc != NULL) 859 free(hcb->dxfer_alloc, M_ATACAM); 860 free(hcb, M_ATACAM); 861 } 862 863 static void 864 free_softc(struct atapi_xpt_softc *scp) 865 { 866 struct atapi_hcb *hcb, *thcb; 867 868 if (scp != NULL) { 869 mtx_lock(&scp->state_lock); 870 TAILQ_FOREACH_SAFE(hcb, &scp->pending_hcbs, chain, thcb) { 871 free_hcb_and_ccb_done(hcb, CAM_UNREC_HBA_ERROR); 872 } 873 if (scp->path != NULL) { 874 setup_async_cb(scp, 0); 875 xpt_free_path(scp->path); 876 } 877 if ((scp->flags & BUS_REGISTERED) != 0) { 878 if (xpt_bus_deregister(cam_sim_path(scp->sim)) == CAM_REQ_CMP) 879 scp->flags &= ~BUS_REGISTERED; 880 } 881 if (scp->sim != NULL) { 882 if ((scp->flags & BUS_REGISTERED) == 0) 883 cam_sim_free(scp->sim, /*free_devq*/TRUE); 884 else 885 printf("Can't free %s SIM (still registered)\n", 886 cam_sim_name(scp->sim)); 887 } 888 mtx_destroy(&scp->state_lock); 889 } 890 } 891 892 static int 893 atapi_cam_event_handler(module_t mod, int what, void *arg) { 894 device_t *devlist; 895 int devcount; 896 897 switch (what) { 898 case MOD_UNLOAD: 899 if (devclass_get_devices(atapi_cam_devclass, &devlist, &devcount) 900 != 0) 901 return ENXIO; 902 if (devlist != NULL) { 903 while (devlist != NULL && devcount > 0) { 904 device_t child = devlist[--devcount]; 905 struct atapi_xpt_softc *scp = device_get_softc(child); 906 907 device_delete_child(device_get_parent(child),child); 908 if (scp != NULL) 909 free(scp, M_ATACAM); 910 } 911 free(devlist, M_TEMP); 912 } 913 break; 914 915 default: 916 break; 917 } 918 return 0; 919 }
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