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_xpt_periph.h> 52 #include <cam/cam_debug.h> 53 #include <cam/scsi/scsi_all.h> 54 55 #include <dev/ata/ata-all.h> 56 #include <ata_if.h> 57 58 /* private data associated with an ATA bus */ 59 struct atapi_xpt_softc { 60 struct ata_device atapi_cam_dev; /* must be first */ 61 device_t dev; 62 device_t parent; 63 struct ata_channel *ata_ch; 64 struct cam_path *path; 65 struct cam_sim *sim; 66 int flags; 67 #define BUS_REGISTERED 0x01 68 #define RESOURCE_SHORTAGE 0x02 69 #define DETACHING 0x04 70 71 TAILQ_HEAD(,atapi_hcb) pending_hcbs; 72 struct ata_device *atadev[2]; 73 struct mtx state_lock; 74 }; 75 76 /* hardware command descriptor block */ 77 struct atapi_hcb { 78 struct atapi_xpt_softc *softc; 79 int unit; 80 int bus; 81 int target; 82 int lun; 83 union ccb *ccb; 84 int flags; 85 #define QUEUED 0x0001 86 #define AUTOSENSE 0x0002 87 char *dxfer_alloc; 88 TAILQ_ENTRY(atapi_hcb) chain; 89 }; 90 91 enum reinit_reason { BOOT_ATTACH, ATTACH, RESET }; 92 93 /* Device methods */ 94 static void atapi_cam_identify(device_t *dev, device_t parent); 95 static int atapi_cam_probe(device_t dev); 96 static int atapi_cam_attach(device_t dev); 97 static int atapi_cam_detach(device_t dev); 98 static int atapi_cam_reinit(device_t dev); 99 100 /* CAM XPT methods */ 101 static void atapi_action(struct cam_sim *, union ccb *); 102 static void atapi_poll(struct cam_sim *); 103 static void atapi_async(void *, u_int32_t, struct cam_path *, void *); 104 static void atapi_cb(struct ata_request *); 105 106 /* Module methods */ 107 static int atapi_cam_event_handler(module_t mod, int what, void *arg); 108 109 /* internal functions */ 110 static void reinit_bus(struct atapi_xpt_softc *scp, enum reinit_reason reason); 111 static void setup_async_cb(struct atapi_xpt_softc *, uint32_t); 112 static void cam_rescan_callback(struct cam_periph *, union ccb *); 113 static void cam_rescan(struct cam_sim *); 114 static void free_hcb_and_ccb_done(struct atapi_hcb *, u_int32_t); 115 static struct atapi_hcb *allocate_hcb(struct atapi_xpt_softc *, int, int, union ccb *); 116 static void free_hcb(struct atapi_hcb *hcb); 117 static void free_softc(struct atapi_xpt_softc *scp); 118 119 static MALLOC_DEFINE(M_ATACAM, "ata_cam", "ATA driver CAM-XPT layer"); 120 121 static device_method_t atapi_cam_methods[] = { 122 DEVMETHOD(device_identify, atapi_cam_identify), 123 DEVMETHOD(device_probe, atapi_cam_probe), 124 DEVMETHOD(device_attach, atapi_cam_attach), 125 DEVMETHOD(device_detach, atapi_cam_detach), 126 DEVMETHOD(ata_reinit, atapi_cam_reinit), 127 {0, 0} 128 }; 129 130 static driver_t atapi_cam_driver = { 131 "atapicam", 132 atapi_cam_methods, 133 sizeof(struct atapi_xpt_softc) 134 }; 135 136 static devclass_t atapi_cam_devclass; 137 DRIVER_MODULE(atapicam, ata, 138 atapi_cam_driver, 139 atapi_cam_devclass, 140 atapi_cam_event_handler, 141 /*arg*/NULL); 142 MODULE_VERSION(atapicam, 1); 143 MODULE_DEPEND(atapicam, ata, 1, 1, 1); 144 MODULE_DEPEND(atapicam, cam, 1, 1, 1); 145 146 static void 147 atapi_cam_identify(device_t *dev, device_t parent) 148 { 149 struct atapi_xpt_softc *scp = 150 malloc (sizeof (struct atapi_xpt_softc), M_ATACAM, M_NOWAIT|M_ZERO); 151 device_t child; 152 153 if (scp == NULL) { 154 printf ("atapi_cam_identify: out of memory"); 155 return; 156 } 157 158 /* Assume one atapicam instance per parent channel instance. */ 159 child = device_add_child(parent, "atapicam", -1); 160 if (child == NULL) { 161 printf ("atapi_cam_identify: out of memory, can't add child"); 162 free (scp, M_ATACAM); 163 return; 164 } 165 scp->atapi_cam_dev.unit = -1; 166 scp->atapi_cam_dev.dev = child; 167 device_quiet(child); 168 device_set_softc(child, scp); 169 } 170 171 static int 172 atapi_cam_probe(device_t dev) 173 { 174 struct ata_device *atadev = device_get_softc (dev); 175 176 KASSERT(atadev != NULL, ("expect valid struct ata_device")); 177 if (atadev->unit < 0) { 178 device_set_desc(dev, "ATAPI CAM Attachment"); 179 return (0); 180 } else { 181 return ENXIO; 182 } 183 } 184 185 static int 186 atapi_cam_attach(device_t dev) 187 { 188 struct atapi_xpt_softc *scp = NULL; 189 struct cam_devq *devq = NULL; 190 struct cam_sim *sim = NULL; 191 struct cam_path *path = NULL; 192 int unit, error; 193 194 scp = (struct atapi_xpt_softc *)device_get_softc(dev); 195 if (scp == NULL) { 196 device_printf(dev, "Cannot get softc\n"); 197 return (ENOMEM); 198 } 199 200 mtx_init(&scp->state_lock, "ATAPICAM lock", NULL, MTX_DEF); 201 202 scp->dev = dev; 203 scp->parent = device_get_parent(dev); 204 scp->ata_ch = device_get_softc(scp->parent); 205 TAILQ_INIT(&scp->pending_hcbs); 206 unit = device_get_unit(dev); 207 208 if ((devq = cam_simq_alloc(16)) == NULL) { 209 error = ENOMEM; 210 goto out; 211 } 212 213 if ((sim = cam_sim_alloc(atapi_action, atapi_poll, "ata", 214 (void *)scp, unit, &scp->state_lock, 1, 1, devq)) == NULL) { 215 error = ENOMEM; 216 goto out; 217 } 218 scp->sim = sim; 219 220 mtx_lock(&scp->state_lock); 221 if (xpt_bus_register(sim, dev, 0) != CAM_SUCCESS) { 222 error = EINVAL; 223 mtx_unlock(&scp->state_lock); 224 goto out; 225 } 226 scp->flags |= BUS_REGISTERED; 227 228 if (xpt_create_path(&path, /*periph*/ NULL, 229 cam_sim_path(sim), CAM_TARGET_WILDCARD, 230 CAM_LUN_WILDCARD) != CAM_REQ_CMP) { 231 error = ENOMEM; 232 mtx_unlock(&scp->state_lock); 233 goto out; 234 } 235 scp->path = path; 236 237 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("Registered SIM for ata%d\n", unit)); 238 239 setup_async_cb(scp, AC_LOST_DEVICE); 240 reinit_bus(scp, cold ? BOOT_ATTACH : ATTACH); 241 error = 0; 242 mtx_unlock(&scp->state_lock); 243 244 out: 245 if (error != 0) 246 free_softc(scp); 247 248 return (error); 249 } 250 251 static int 252 atapi_cam_detach(device_t dev) 253 { 254 struct atapi_xpt_softc *scp = device_get_softc(dev); 255 256 mtx_lock(&scp->state_lock); 257 if (xpt_sim_opened(scp->sim)) { 258 mtx_unlock(&scp->state_lock); 259 return (EBUSY); 260 } 261 xpt_freeze_simq(scp->sim, 1 /*count*/); 262 scp->flags |= DETACHING; 263 mtx_unlock(&scp->state_lock); 264 free_softc(scp); 265 return (0); 266 } 267 268 static int 269 atapi_cam_reinit(device_t dev) { 270 struct atapi_xpt_softc *scp = device_get_softc(dev); 271 272 /* 273 * scp might be null if the bus is being reinitialised during 274 * the boot-up sequence, before the ATAPI bus is registered. 275 */ 276 277 if (scp != NULL) { 278 mtx_lock(&scp->state_lock); 279 reinit_bus(scp, RESET); 280 mtx_unlock(&scp->state_lock); 281 } 282 return (0); 283 } 284 285 static void 286 reinit_bus(struct atapi_xpt_softc *scp, enum reinit_reason reason) { 287 struct ata_device *old_atadev[2], *atadev; 288 device_t *children; 289 int nchildren, i, dev_changed; 290 291 if (device_get_children(scp->parent, &children, &nchildren) != 0) { 292 return; 293 } 294 295 old_atadev[0] = scp->atadev[0]; 296 old_atadev[1] = scp->atadev[1]; 297 scp->atadev[0] = NULL; 298 scp->atadev[1] = NULL; 299 300 for (i = 0; i < nchildren; i++) { 301 /* XXX Does the child need to actually be attached yet? */ 302 if (children[i] != NULL) { 303 atadev = device_get_softc(children[i]); 304 if ((atadev->unit == ATA_MASTER) && 305 (scp->ata_ch->devices & ATA_ATAPI_MASTER) != 0) 306 scp->atadev[0] = atadev; 307 if ((atadev->unit == ATA_SLAVE) && 308 (scp->ata_ch->devices & ATA_ATAPI_SLAVE) != 0) 309 scp->atadev[1] = atadev; 310 } 311 } 312 dev_changed = (old_atadev[0] != scp->atadev[0]) 313 || (old_atadev[1] != scp->atadev[1]); 314 free(children, M_TEMP); 315 316 switch (reason) { 317 case BOOT_ATTACH: 318 break; 319 case RESET: 320 xpt_async(AC_BUS_RESET, scp->path, NULL); 321 322 if (!dev_changed) 323 break; 324 325 /*FALLTHROUGH*/ 326 case ATTACH: 327 cam_rescan(scp->sim); 328 break; 329 } 330 } 331 332 static void 333 setup_async_cb(struct atapi_xpt_softc *scp, uint32_t events) 334 { 335 struct ccb_setasync csa; 336 337 xpt_setup_ccb(&csa.ccb_h, scp->path, /*priority*/ 5); 338 csa.ccb_h.func_code = XPT_SASYNC_CB; 339 csa.event_enable = events; 340 csa.callback = &atapi_async; 341 csa.callback_arg = scp->sim; 342 xpt_action((union ccb *) &csa); 343 } 344 345 static void 346 atapi_action(struct cam_sim *sim, union ccb *ccb) 347 { 348 struct atapi_xpt_softc *softc = (struct atapi_xpt_softc*)cam_sim_softc(sim); 349 struct ccb_hdr *ccb_h = &ccb->ccb_h; 350 struct atapi_hcb *hcb = NULL; 351 struct ata_request *request = NULL; 352 int unit = cam_sim_unit(sim); 353 int bus = cam_sim_bus(sim); 354 int len; 355 char *buf; 356 357 switch (ccb_h->func_code) { 358 case XPT_PATH_INQ: { 359 struct ccb_pathinq *cpi = &ccb->cpi; 360 int tid = ccb_h->target_id; 361 362 cpi->version_num = 1; 363 cpi->hba_inquiry = 0; 364 cpi->target_sprt = 0; 365 cpi->hba_misc = PIM_NO_6_BYTE; 366 cpi->hba_eng_cnt = 0; 367 bzero(cpi->vuhba_flags, sizeof(cpi->vuhba_flags)); 368 cpi->max_target = 1; 369 cpi->max_lun = 0; 370 cpi->async_flags = 0; 371 cpi->hpath_id = 0; 372 cpi->initiator_id = 7; 373 strncpy(cpi->sim_vid, "FreeBSD", sizeof(cpi->sim_vid)); 374 strncpy(cpi->hba_vid, "ATAPI", sizeof(cpi->hba_vid)); 375 strncpy(cpi->dev_name, cam_sim_name(sim), sizeof cpi->dev_name); 376 cpi->unit_number = cam_sim_unit(sim); 377 cpi->bus_id = cam_sim_bus(sim); 378 cpi->base_transfer_speed = 3300; 379 cpi->transport = XPORT_ATA; 380 cpi->transport_version = 2; 381 cpi->protocol = PROTO_SCSI; 382 cpi->protocol_version = SCSI_REV_2; 383 384 if (softc->ata_ch && tid != CAM_TARGET_WILDCARD) { 385 if (softc->atadev[tid] == NULL) { 386 ccb->ccb_h.status = CAM_DEV_NOT_THERE; 387 xpt_done(ccb); 388 return; 389 } 390 switch (softc->atadev[ccb_h->target_id]->mode) { 391 case ATA_PIO1: 392 cpi->base_transfer_speed = 5200; 393 break; 394 case ATA_PIO2: 395 cpi->base_transfer_speed = 7000; 396 break; 397 case ATA_PIO3: 398 cpi->base_transfer_speed = 11000; 399 break; 400 case ATA_PIO4: 401 case ATA_DMA: 402 case ATA_WDMA2: 403 cpi->base_transfer_speed = 16000; 404 break; 405 case ATA_UDMA2: 406 cpi->base_transfer_speed = 33000; 407 break; 408 case ATA_UDMA4: 409 cpi->base_transfer_speed = 66000; 410 break; 411 case ATA_UDMA5: 412 cpi->base_transfer_speed = 100000; 413 break; 414 case ATA_UDMA6: 415 cpi->base_transfer_speed = 133000; 416 break; 417 default: 418 break; 419 } 420 } 421 ccb->ccb_h.status = CAM_REQ_CMP; 422 xpt_done(ccb); 423 return; 424 } 425 426 case XPT_RESET_DEV: { 427 int tid = ccb_h->target_id; 428 429 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("dev reset\n")); 430 mtx_unlock(&softc->state_lock); 431 ata_controlcmd(softc->atadev[tid]->dev, ATA_DEVICE_RESET, 0, 0, 0); 432 mtx_lock(&softc->state_lock); 433 ccb->ccb_h.status = CAM_REQ_CMP; 434 xpt_done(ccb); 435 return; 436 } 437 438 case XPT_RESET_BUS: 439 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("bus reset\n")); 440 mtx_unlock(&softc->state_lock); 441 ata_reinit(softc->parent); 442 mtx_lock(&softc->state_lock); 443 ccb->ccb_h.status = CAM_REQ_CMP; 444 xpt_done(ccb); 445 return; 446 447 case XPT_SET_TRAN_SETTINGS: 448 /* ignore these, we're not doing SCSI here */ 449 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, 450 ("SET_TRAN_SETTINGS not supported\n")); 451 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 452 xpt_done(ccb); 453 return; 454 455 case XPT_GET_TRAN_SETTINGS: { 456 struct ccb_trans_settings *cts = &ccb->cts; 457 cts->protocol = PROTO_SCSI; 458 cts->protocol_version = SCSI_REV_2; 459 cts->transport = XPORT_ATA; 460 cts->transport_version = XPORT_VERSION_UNSPECIFIED; 461 cts->proto_specific.valid = 0; 462 cts->xport_specific.valid = 0; 463 /* nothing more to do */ 464 ccb->ccb_h.status = CAM_REQ_CMP; 465 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("GET_TRAN_SETTINGS\n")); 466 xpt_done(ccb); 467 return; 468 } 469 470 case XPT_CALC_GEOMETRY: { 471 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("CALC_GEOMETRY\n")); 472 cam_calc_geometry(&ccb->ccg, /*extended*/1); 473 xpt_done(ccb); 474 return; 475 } 476 477 case XPT_SCSI_IO: { 478 struct ccb_scsiio *csio = &ccb->csio; 479 int tid = ccb_h->target_id, lid = ccb_h->target_lun; 480 int request_flags = ATA_R_ATAPI; 481 482 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, ("XPT_SCSI_IO\n")); 483 484 if (softc->flags & DETACHING) { 485 ccb->ccb_h.status = CAM_REQ_ABORTED; 486 xpt_done(ccb); 487 return; 488 } 489 490 if (softc->atadev[tid] == NULL) { 491 ccb->ccb_h.status = CAM_DEV_NOT_THERE; 492 xpt_done(ccb); 493 return; 494 } 495 496 /* check that this request was not aborted already */ 497 if ((ccb_h->status & CAM_STATUS_MASK) != CAM_REQ_INPROG) { 498 printf("XPT_SCSI_IO received but already in progress?\n"); 499 xpt_done(ccb); 500 return; 501 } 502 if (lid > 0) { 503 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, 504 ("SCSI IO received for invalid lun %d\n", lid)); 505 goto action_invalid; 506 } 507 if (csio->cdb_len > sizeof request->u.atapi.ccb) { 508 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, 509 ("CAM CCB too long for ATAPI")); 510 goto action_invalid; 511 } 512 if ((ccb_h->flags & CAM_SCATTER_VALID)) { 513 /* scatter-gather not supported */ 514 xpt_print_path(ccb_h->path); 515 printf("ATAPI/CAM does not support scatter-gather yet!\n"); 516 goto action_invalid; 517 } 518 519 switch (ccb_h->flags & CAM_DIR_MASK) { 520 case CAM_DIR_IN: 521 request_flags |= ATA_R_READ; 522 break; 523 case CAM_DIR_OUT: 524 request_flags |= ATA_R_WRITE; 525 break; 526 case CAM_DIR_NONE: 527 /* No flags need to be set */ 528 break; 529 default: 530 device_printf(softc->dev, "unknown IO operation\n"); 531 goto action_invalid; 532 } 533 534 if ((hcb = allocate_hcb(softc, unit, bus, ccb)) == NULL) { 535 printf("cannot allocate ATAPI/CAM hcb\n"); 536 goto action_oom; 537 } 538 if ((request = ata_alloc_request()) == NULL) { 539 printf("cannot allocate ATAPI/CAM request\n"); 540 goto action_oom; 541 } 542 543 bcopy((ccb_h->flags & CAM_CDB_POINTER) ? 544 csio->cdb_io.cdb_ptr : csio->cdb_io.cdb_bytes, 545 request->u.atapi.ccb, csio->cdb_len); 546 #ifdef CAMDEBUG 547 if (CAM_DEBUGGED(ccb_h->path, CAM_DEBUG_CDB)) { 548 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 549 550 printf("atapi_action: hcb@%p: %s\n", hcb, 551 scsi_cdb_string(request->u.atapi.ccb, cdb_str, sizeof(cdb_str))); 552 } 553 if (CAM_DEBUGGED(ccb_h->path, CAM_DEBUG_SUBTRACE)) { 554 request_flags |= ATA_R_DEBUG; 555 } 556 #endif 557 558 len = csio->dxfer_len; 559 buf = csio->data_ptr; 560 561 /* some SCSI commands require special processing */ 562 switch (request->u.atapi.ccb[0]) { 563 case INQUIRY: { 564 /* 565 * many ATAPI devices seem to report more than 566 * SHORT_INQUIRY_LENGTH bytes of available INQUIRY 567 * information, but respond with some incorrect condition 568 * when actually asked for it, so we are going to pretend 569 * that only SHORT_INQUIRY_LENGTH are expected, anyway. 570 */ 571 struct scsi_inquiry *inq = (struct scsi_inquiry *) &request->u.atapi.ccb[0]; 572 573 if (inq->byte2 == 0 && inq->page_code == 0 && 574 inq->length > SHORT_INQUIRY_LENGTH) { 575 bzero(buf, len); 576 len = inq->length = SHORT_INQUIRY_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 / 1000; /* XXX lost granularity */ 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 mtx_unlock(&softc->state_lock); 670 return; 671 672 action_invalid: 673 ccb_h->status = CAM_REQ_INVALID; 674 xpt_done(ccb); 675 mtx_unlock(&softc->state_lock); 676 return; 677 } 678 679 static void 680 atapi_poll(struct cam_sim *sim) 681 { 682 /* do nothing - we do not actually service any interrupts */ 683 printf("atapi_poll called!\n"); 684 } 685 686 static void 687 atapi_cb(struct ata_request *request) 688 { 689 struct atapi_xpt_softc *scp; 690 struct atapi_hcb *hcb; 691 struct ccb_scsiio *csio; 692 u_int32_t rc; 693 694 hcb = (struct atapi_hcb *)request->driver; 695 scp = hcb->softc; 696 csio = &hcb->ccb->csio; 697 698 #ifdef CAMDEBUG 699 # define err (request->u.atapi.sense.key) 700 if (CAM_DEBUGGED(csio->ccb_h.path, CAM_DEBUG_CDB)) { 701 printf("atapi_cb: hcb@%p sense = %02x: sk = %01x%s%s%s\n", 702 hcb, err, err & 0x0f, 703 (err & 0x80) ? ", Filemark" : "", 704 (err & 0x40) ? ", EOM" : "", 705 (err & 0x20) ? ", ILI" : ""); 706 device_printf(request->dev, 707 "cmd %s status %02x result %02x error %02x\n", 708 ata_cmd2str(request), 709 request->status, request->result, request->error); 710 } 711 #endif 712 713 if ((hcb->flags & AUTOSENSE) != 0) { 714 rc = CAM_SCSI_STATUS_ERROR; 715 if (request->result == 0) { 716 csio->ccb_h.status |= CAM_AUTOSNS_VALID; 717 } 718 } else if (request->result != 0) { 719 if ((request->flags & ATA_R_TIMEOUT) != 0) { 720 rc = CAM_CMD_TIMEOUT; 721 } else { 722 rc = CAM_SCSI_STATUS_ERROR; 723 csio->scsi_status = SCSI_STATUS_CHECK_COND; 724 725 if ((csio->ccb_h.flags & CAM_DIS_AUTOSENSE) == 0) { 726 #if 0 727 static const int8_t ccb[16] = { ATAPI_REQUEST_SENSE, 0, 0, 0, 728 sizeof(struct atapi_sense), 0, 0, 0, 0, 0, 0, 729 0, 0, 0, 0, 0 }; 730 731 bcopy (ccb, request->u.atapi.ccb, sizeof ccb); 732 request->data = (caddr_t)&csio->sense_data; 733 request->bytecount = sizeof(struct atapi_sense); 734 request->transfersize = min(request->bytecount, 65534); 735 request->timeout = csio->ccb_h.timeout / 1000; 736 request->retries = 2; 737 request->flags = ATA_R_QUIET|ATA_R_ATAPI|ATA_R_IMMEDIATE; 738 hcb->flags |= AUTOSENSE; 739 740 ata_queue_request(request); 741 return; 742 #else 743 /* 744 * Use auto-sense data from the ATA layer, if it has 745 * issued a REQUEST SENSE automatically and that operation 746 * returned without error. 747 */ 748 if (request->u.atapi.sense.key != 0 && request->error == 0) { 749 bcopy (&request->u.atapi.sense, &csio->sense_data, sizeof(struct atapi_sense)); 750 csio->ccb_h.status |= CAM_AUTOSNS_VALID; 751 } 752 } 753 #endif 754 } 755 } else { 756 rc = CAM_REQ_CMP; 757 csio->scsi_status = SCSI_STATUS_OK; 758 if (((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) && 759 hcb->dxfer_alloc != NULL) 760 { 761 bcopy(hcb->dxfer_alloc, csio->data_ptr, csio->dxfer_len); 762 } 763 } 764 765 mtx_lock(&scp->state_lock); 766 free_hcb_and_ccb_done(hcb, rc); 767 mtx_unlock(&scp->state_lock); 768 769 ata_free_request(request); 770 } 771 772 static void 773 free_hcb_and_ccb_done(struct atapi_hcb *hcb, u_int32_t status) 774 { 775 struct atapi_xpt_softc *softc; 776 union ccb *ccb; 777 778 if (hcb == NULL) 779 return; 780 781 softc = hcb->softc; 782 ccb = hcb->ccb; 783 784 /* we're about to free a hcb, so the shortage has ended */ 785 if (softc->flags & RESOURCE_SHORTAGE) { 786 softc->flags &= ~RESOURCE_SHORTAGE; 787 status |= CAM_RELEASE_SIMQ; 788 } 789 free_hcb(hcb); 790 ccb->ccb_h.status = 791 status | (ccb->ccb_h.status & ~(CAM_STATUS_MASK | CAM_SIM_QUEUED)); 792 xpt_done(ccb); 793 } 794 795 static void 796 atapi_async(void *callback_arg, u_int32_t code, 797 struct cam_path* path, void *arg) 798 { 799 struct atapi_xpt_softc *softc; 800 struct cam_sim *sim; 801 int targ; 802 803 GIANT_REQUIRED; 804 805 sim = (struct cam_sim *) callback_arg; 806 softc = (struct atapi_xpt_softc *) cam_sim_softc(sim); 807 switch (code) { 808 case AC_LOST_DEVICE: 809 targ = xpt_path_target_id(path); 810 xpt_print_path(path); 811 if (targ == -1) 812 printf("Lost host adapter\n"); 813 else 814 printf("Lost target %d???\n", targ); 815 break; 816 817 default: 818 break; 819 } 820 } 821 822 static void 823 cam_rescan_callback(struct cam_periph *periph, union ccb *ccb) 824 { 825 if (ccb->ccb_h.status != CAM_REQ_CMP) { 826 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, 827 ("Rescan failed, 0x%04x\n", ccb->ccb_h.status)); 828 } else { 829 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, 830 ("Rescan succeeded\n")); 831 } 832 xpt_free_path(ccb->ccb_h.path); 833 xpt_free_ccb(ccb); 834 } 835 836 static void 837 cam_rescan(struct cam_sim *sim) 838 { 839 struct cam_path *path; 840 union ccb *ccb; 841 842 ccb = xpt_alloc_ccb_nowait(); 843 if (ccb == NULL) 844 return; 845 846 if (xpt_create_path(&path, xpt_periph, cam_sim_path(sim), 847 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) { 848 xpt_free_ccb(ccb); 849 return; 850 } 851 852 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("Rescanning ATAPI bus.\n")); 853 xpt_setup_ccb(&ccb->ccb_h, path, 5/*priority (low)*/); 854 ccb->ccb_h.func_code = XPT_SCAN_BUS; 855 ccb->ccb_h.cbfcnp = cam_rescan_callback; 856 ccb->crcn.flags = CAM_FLAG_NONE; 857 xpt_action(ccb); 858 /* scan is in progress now */ 859 } 860 861 static struct atapi_hcb * 862 allocate_hcb(struct atapi_xpt_softc *softc, int unit, int bus, union ccb *ccb) 863 { 864 struct atapi_hcb *hcb = (struct atapi_hcb *) 865 malloc(sizeof(struct atapi_hcb), M_ATACAM, M_NOWAIT | M_ZERO); 866 867 if (hcb != NULL) { 868 hcb->softc = softc; 869 hcb->unit = unit; 870 hcb->bus = bus; 871 hcb->ccb = ccb; 872 } 873 return hcb; 874 } 875 876 static void 877 free_hcb(struct atapi_hcb *hcb) 878 { 879 if ((hcb->flags & QUEUED) != 0) 880 TAILQ_REMOVE(&hcb->softc->pending_hcbs, hcb, chain); 881 if (hcb->dxfer_alloc != NULL) 882 free(hcb->dxfer_alloc, M_ATACAM); 883 free(hcb, M_ATACAM); 884 } 885 886 static void 887 free_softc(struct atapi_xpt_softc *scp) 888 { 889 struct atapi_hcb *hcb; 890 891 if (scp != NULL) { 892 mtx_lock(&scp->state_lock); 893 TAILQ_FOREACH(hcb, &scp->pending_hcbs, chain) { 894 free_hcb_and_ccb_done(hcb, CAM_UNREC_HBA_ERROR); 895 } 896 if (scp->path != NULL) { 897 setup_async_cb(scp, 0); 898 xpt_free_path(scp->path); 899 } 900 if ((scp->flags & BUS_REGISTERED) != 0) { 901 if (xpt_bus_deregister(cam_sim_path(scp->sim)) == CAM_REQ_CMP) 902 scp->flags &= ~BUS_REGISTERED; 903 } 904 if (scp->sim != NULL) { 905 if ((scp->flags & BUS_REGISTERED) == 0) 906 cam_sim_free(scp->sim, /*free_devq*/TRUE); 907 else 908 printf("Can't free %s SIM (still registered)\n", 909 cam_sim_name(scp->sim)); 910 } 911 mtx_destroy(&scp->state_lock); 912 } 913 } 914 915 static int 916 atapi_cam_event_handler(module_t mod, int what, void *arg) { 917 device_t *devlist; 918 int devcount; 919 920 switch (what) { 921 case MOD_UNLOAD: 922 if (devclass_get_devices(atapi_cam_devclass, &devlist, &devcount) 923 != 0) 924 return ENXIO; 925 if (devlist != NULL) { 926 while (devlist != NULL && devcount > 0) { 927 device_t child = devlist[--devcount]; 928 struct atapi_xpt_softc *scp = device_get_softc(child); 929 930 device_delete_child(device_get_parent(child),child); 931 if (scp != NULL) 932 free(scp, M_ATACAM); 933 } 934 free(devlist, M_TEMP); 935 } 936 break; 937 938 default: 939 break; 940 } 941 return 0; 942 }
Cache object: ad3c32039646bd90f7b239f4c8ef2b90
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