1 /*- 2 * Copyright (c) 2001-2003 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 * $FreeBSD: src/sys/dev/ata/atapi-cam.c,v 1.44 2006/03/31 08:09:05 sos Exp $ 29 * $DragonFly: src/sys/dev/disk/nata/atapi-cam.c,v 1.12 2008/11/19 08:12:16 hasso Exp $ 30 */ 31 32 #include "opt_ata.h" 33 #include "opt_scsi.h" 34 35 #include <sys/param.h> 36 #include <sys/bus.h> 37 #include <sys/libkern.h> 38 #include <sys/lock.h> /* for {get,rel}_mplock() */ 39 #include <sys/malloc.h> 40 #include <sys/module.h> 41 #include <sys/nata.h> 42 #include <sys/spinlock.h> 43 #include <sys/spinlock2.h> 44 #include <sys/queue.h> 45 #include <sys/systm.h> 46 #include <sys/thread2.h> 47 48 #include <bus/cam/cam.h> 49 #include <bus/cam/cam_ccb.h> 50 #include <bus/cam/cam_periph.h> 51 #include <bus/cam/cam_sim.h> 52 #include <bus/cam/cam_xpt_sim.h> 53 #include <bus/cam/cam_debug.h> 54 #include <bus/cam/scsi/scsi_all.h> 55 56 #include "ata-all.h" 57 #include "ata_if.h" 58 59 /* private data associated with an ATA bus */ 60 struct atapi_xpt_softc { 61 struct ata_device atapi_cam_dev; /* must be first */ 62 device_t dev; 63 device_t parent; 64 struct ata_channel *ata_ch; 65 struct cam_path *path; 66 struct cam_sim *sim; 67 int flags; 68 #define BUS_REGISTERED 0x01 69 #define RESOURCE_SHORTAGE 0x02 70 #define DETACHING 0x04 71 72 TAILQ_HEAD(,atapi_hcb) pending_hcbs; 73 struct ata_device *atadev[2]; 74 struct spinlock state_lock; 75 }; 76 77 /* hardware command descriptor block */ 78 struct atapi_hcb { 79 struct atapi_xpt_softc *softc; 80 int unit; 81 int bus; 82 int target; 83 int lun; 84 union ccb *ccb; 85 int flags; 86 #define QUEUED 0x0001 87 #define AUTOSENSE 0x0002 88 char *dxfer_alloc; 89 TAILQ_ENTRY(atapi_hcb) chain; 90 }; 91 92 enum reinit_reason { ATTACH, RESET }; 93 94 /* Device methods */ 95 static void atapi_cam_identify(device_t *dev, device_t parent); 96 static int atapi_cam_probe(device_t dev); 97 static int atapi_cam_attach(device_t dev); 98 static int atapi_cam_detach(device_t dev); 99 static int atapi_cam_reinit(device_t dev); 100 101 /* CAM XPT methods */ 102 static void atapi_action(struct cam_sim *, union ccb *); 103 static void atapi_poll(struct cam_sim *); 104 static void atapi_async(void *, u_int32_t, struct cam_path *, void *); 105 static void atapi_cb(struct ata_request *); 106 107 /* Module methods */ 108 static int atapi_cam_event_handler(module_t mod, int what, void *arg); 109 110 /* internal functions */ 111 static void reinit_bus(struct atapi_xpt_softc *scp, enum reinit_reason reason); 112 static void setup_async_cb(struct atapi_xpt_softc *, uint32_t); 113 static void cam_rescan_callback(struct cam_periph *, union ccb *); 114 static void cam_rescan(struct cam_sim *); 115 static void free_hcb_and_ccb_done(struct atapi_hcb *, u_int32_t); 116 static struct atapi_hcb *allocate_hcb(struct atapi_xpt_softc *, int, int, union ccb *); 117 static void free_hcb(struct atapi_hcb *hcb); 118 static void free_softc(struct atapi_xpt_softc *scp); 119 120 static MALLOC_DEFINE(M_ATACAM, "ata_cam", "ATA driver CAM-XPT layer"); 121 122 static device_method_t atapi_cam_methods[] = { 123 DEVMETHOD(device_identify, atapi_cam_identify), 124 DEVMETHOD(device_probe, atapi_cam_probe), 125 DEVMETHOD(device_attach, atapi_cam_attach), 126 DEVMETHOD(device_detach, atapi_cam_detach), 127 DEVMETHOD(ata_reinit, atapi_cam_reinit), 128 {0, 0} 129 }; 130 131 static driver_t atapi_cam_driver = { 132 "atapicam", 133 atapi_cam_methods, 134 sizeof(struct atapi_xpt_softc) 135 }; 136 137 static devclass_t atapi_cam_devclass; 138 DRIVER_MODULE(atapicam, ata, 139 atapi_cam_driver, 140 atapi_cam_devclass, 141 atapi_cam_event_handler, 142 /*arg*/NULL); 143 MODULE_VERSION(atapicam, 1); 144 MODULE_DEPEND(atapicam, ata, 1, 1, 1); 145 MODULE_DEPEND(atapicam, cam, 1, 1, 1); 146 147 static void 148 atapi_cam_identify(device_t *dev, device_t parent) 149 { 150 struct atapi_xpt_softc *scp = 151 kmalloc(sizeof(struct atapi_xpt_softc), M_ATACAM, M_INTWAIT|M_ZERO); 152 device_t child; 153 154 /* Assume one atapicam instance per parent channel instance. */ 155 child = device_add_child(parent, "atapicam", -1); 156 if (child == NULL) { 157 /* XXX TGEN Use device_printf()? */ 158 kprintf("atapi_cam_identify: out of memory, can't add child"); 159 kfree(scp, M_ATACAM); 160 return; 161 } 162 scp->atapi_cam_dev.unit = -1; 163 scp->atapi_cam_dev.dev = child; 164 device_quiet(child); 165 device_set_softc(child, scp); 166 } 167 168 static int 169 atapi_cam_probe(device_t dev) 170 { 171 struct ata_device *atadev = device_get_softc (dev); 172 173 KASSERT(atadev != NULL, ("expect valid struct ata_device")); 174 if (atadev->unit < 0) { 175 device_set_desc(dev, "ATAPI CAM Attachment"); 176 return(0); 177 } else { 178 return ENXIO; 179 } 180 } 181 182 static int 183 atapi_cam_attach(device_t dev) 184 { 185 struct atapi_xpt_softc *scp = NULL; 186 struct cam_devq *devq = NULL; 187 struct cam_sim *sim = NULL; 188 struct cam_path *path = NULL; 189 int unit, error; 190 191 scp = (struct atapi_xpt_softc *)device_get_softc(dev); 192 if (scp == NULL) { 193 device_printf(dev, "Cannot get softc\n"); 194 return ENOMEM; 195 } 196 197 spin_init(&scp->state_lock); 198 199 scp->dev = dev; 200 scp->parent = device_get_parent(dev); 201 scp->ata_ch = device_get_softc(scp->parent); 202 TAILQ_INIT(&scp->pending_hcbs); 203 unit = device_get_unit(dev); 204 205 if ((devq = cam_simq_alloc(16)) == NULL) { 206 error = ENOMEM; 207 goto out; 208 } 209 210 if ((sim = cam_sim_alloc(atapi_action, atapi_poll, "ata", 211 (void *)scp, unit, &sim_mplock, 1, 1, devq)) == NULL) { 212 error = ENOMEM; 213 goto out; 214 } 215 scp->sim = sim; 216 217 if (xpt_bus_register(sim, 0) != CAM_SUCCESS) { 218 error = EINVAL; 219 goto out; 220 } 221 scp->flags |= BUS_REGISTERED; 222 223 if (xpt_create_path(&path, /*periph*/ NULL, 224 cam_sim_path(sim), CAM_TARGET_WILDCARD, 225 CAM_LUN_WILDCARD) != CAM_REQ_CMP) { 226 error = ENOMEM; 227 goto out; 228 } 229 scp->path = path; 230 231 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("Registered SIM for ata%d\n", unit)); 232 233 setup_async_cb(scp, AC_LOST_DEVICE); 234 reinit_bus(scp, ATTACH); 235 error = 0; 236 237 out: 238 if (error != 0) 239 free_softc(scp); 240 241 return(error); 242 } 243 244 static int 245 atapi_cam_detach(device_t dev) 246 { 247 struct atapi_xpt_softc *scp = device_get_softc(dev); 248 249 get_mplock(); 250 xpt_freeze_simq(scp->sim, 1 /*count*/); 251 rel_mplock(); 252 spin_lock_wr(&scp->state_lock); 253 scp->flags |= DETACHING; 254 spin_unlock_wr(&scp->state_lock); 255 free_softc(scp); 256 return (0); 257 } 258 259 static int 260 atapi_cam_reinit(device_t dev) { 261 struct atapi_xpt_softc *scp = device_get_softc(dev); 262 263 /* 264 * scp might be null if the bus is being reinitialised during 265 * the boot-up sequence, before the ATAPI bus is registered. 266 */ 267 268 if (scp != NULL) { 269 reinit_bus(scp, RESET); 270 } 271 return 0; 272 } 273 274 static void 275 reinit_bus(struct atapi_xpt_softc *scp, enum reinit_reason reason) { 276 struct ata_device *old_atadev[2], *atadev; 277 device_t *children; 278 int nchildren, i, dev_changed; 279 280 if (device_get_children(scp->parent, &children, &nchildren) != 0) { 281 return; 282 } 283 284 spin_lock_wr(&scp->state_lock); 285 old_atadev[0] = scp->atadev[0]; 286 old_atadev[1] = scp->atadev[1]; 287 scp->atadev[0] = NULL; 288 scp->atadev[1] = NULL; 289 290 for (i = 0; i < nchildren; i++) { 291 /* XXX Does the child need to actually be attached yet? */ 292 if (children[i] != NULL) { 293 atadev = device_get_softc(children[i]); 294 if ((atadev->unit == ATA_MASTER) && 295 (scp->ata_ch->devices & ATA_ATAPI_MASTER) != 0) 296 scp->atadev[0] = atadev; 297 if ((atadev->unit == ATA_SLAVE) && 298 (scp->ata_ch->devices & ATA_ATAPI_SLAVE) != 0) 299 scp->atadev[1] = atadev; 300 } 301 } 302 dev_changed = (old_atadev[0] != scp->atadev[0]) 303 || (old_atadev[1] != scp->atadev[1]); 304 spin_unlock_wr(&scp->state_lock); 305 kfree(children, M_TEMP); 306 307 switch (reason) { 308 case RESET: 309 xpt_async(AC_BUS_RESET, scp->path, NULL); 310 311 if (!dev_changed) 312 break; 313 314 /*FALLTHROUGH*/ 315 case ATTACH: 316 cam_rescan(scp->sim); 317 break; 318 } 319 } 320 321 static void 322 setup_async_cb(struct atapi_xpt_softc *scp, uint32_t events) 323 { 324 struct ccb_setasync csa; 325 326 get_mplock(); 327 xpt_setup_ccb(&csa.ccb_h, scp->path, /*priority*/ 5); 328 csa.ccb_h.func_code = XPT_SASYNC_CB; 329 csa.event_enable = events; 330 csa.callback = &atapi_async; 331 csa.callback_arg = scp->sim; 332 xpt_action((union ccb *) &csa); 333 rel_mplock(); 334 } 335 336 static void 337 atapi_action(struct cam_sim *sim, union ccb *ccb) 338 { 339 struct atapi_xpt_softc *softc = (struct atapi_xpt_softc*)cam_sim_softc(sim); 340 struct ccb_hdr *ccb_h = &ccb->ccb_h; 341 struct atapi_hcb *hcb = NULL; 342 struct ata_request *request = NULL; 343 int unit = cam_sim_unit(sim); 344 int bus = cam_sim_bus(sim); 345 int len; 346 char *buf; 347 348 switch (ccb_h->func_code) { 349 case XPT_PATH_INQ: { 350 struct ccb_pathinq *cpi = &ccb->cpi; 351 int tid = ccb_h->target_id; 352 353 cpi->version_num = 1; 354 cpi->hba_inquiry = 0; 355 cpi->target_sprt = 0; 356 cpi->hba_misc = PIM_NO_6_BYTE; 357 cpi->hba_eng_cnt = 0; 358 bzero(cpi->vuhba_flags, sizeof(cpi->vuhba_flags)); 359 cpi->max_target = 1; 360 cpi->max_lun = 0; 361 cpi->async_flags = 0; 362 cpi->hpath_id = 0; 363 cpi->initiator_id = 7; 364 strncpy(cpi->sim_vid, "FreeBSD", sizeof(cpi->sim_vid)); 365 strncpy(cpi->hba_vid, "ATAPI", sizeof(cpi->hba_vid)); 366 strncpy(cpi->dev_name, cam_sim_name(sim), sizeof cpi->dev_name); 367 cpi->unit_number = cam_sim_unit(sim); 368 cpi->bus_id = cam_sim_bus(sim); 369 cpi->base_transfer_speed = 3300; 370 cpi->transport = XPORT_ATA; 371 cpi->transport_version = 2; 372 cpi->protocol = PROTO_SCSI; 373 cpi->protocol_version = SCSI_REV_2; 374 375 if (softc->ata_ch && tid != CAM_TARGET_WILDCARD) { 376 spin_lock_wr(&softc->state_lock); 377 if (softc->atadev[tid] == NULL) { 378 ccb->ccb_h.status = CAM_DEV_NOT_THERE; 379 xpt_done(ccb); 380 spin_unlock_wr(&softc->state_lock); 381 return; 382 } 383 switch (softc->atadev[ccb_h->target_id]->mode) { 384 case ATA_PIO1: 385 cpi->base_transfer_speed = 5200; 386 break; 387 case ATA_PIO2: 388 cpi->base_transfer_speed = 7000; 389 break; 390 case ATA_PIO3: 391 cpi->base_transfer_speed = 11000; 392 break; 393 case ATA_PIO4: 394 case ATA_DMA: 395 case ATA_WDMA2: 396 cpi->base_transfer_speed = 16000; 397 break; 398 case ATA_UDMA2: 399 cpi->base_transfer_speed = 33000; 400 break; 401 case ATA_UDMA4: 402 cpi->base_transfer_speed = 66000; 403 break; 404 case ATA_UDMA5: 405 cpi->base_transfer_speed = 100000; 406 break; 407 case ATA_UDMA6: 408 cpi->base_transfer_speed = 133000; 409 break; 410 default: 411 break; 412 } 413 spin_unlock_wr(&softc->state_lock); 414 } 415 ccb->ccb_h.status = CAM_REQ_CMP; 416 xpt_done(ccb); 417 return; 418 } 419 420 case XPT_RESET_DEV: { 421 int tid = ccb_h->target_id; 422 423 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("dev reset\n")); 424 ata_controlcmd(softc->atadev[tid]->dev, ATA_DEVICE_RESET, 0, 0, 0); 425 ccb->ccb_h.status = CAM_REQ_CMP; 426 xpt_done(ccb); 427 return; 428 } 429 430 case XPT_RESET_BUS: 431 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("bus reset\n")); 432 ata_reinit(softc->parent); 433 ccb->ccb_h.status = CAM_REQ_CMP; 434 xpt_done(ccb); 435 return; 436 437 case XPT_SET_TRAN_SETTINGS: 438 /* ignore these, we're not doing SCSI here */ 439 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, 440 ("SET_TRAN_SETTINGS not supported\n")); 441 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 442 xpt_done(ccb); 443 return; 444 445 case XPT_GET_TRAN_SETTINGS: { 446 struct ccb_trans_settings *cts = &ccb->cts; 447 cts->protocol = PROTO_SCSI; 448 cts->protocol_version = SCSI_REV_2; 449 cts->transport = XPORT_ATA; 450 cts->transport_version = XPORT_VERSION_UNSPECIFIED; 451 cts->proto_specific.valid = 0; 452 cts->xport_specific.valid = 0; 453 /* nothing more to do */ 454 ccb->ccb_h.status = CAM_REQ_CMP; 455 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("GET_TRAN_SETTINGS\n")); 456 xpt_done(ccb); 457 return; 458 } 459 460 case XPT_CALC_GEOMETRY: { 461 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("CALC_GEOMETRY\n")); 462 cam_calc_geometry(&ccb->ccg, /*extended*/1); 463 xpt_done(ccb); 464 return; 465 } 466 467 case XPT_SCSI_IO: { 468 struct ccb_scsiio *csio = &ccb->csio; 469 int tid = ccb_h->target_id, lid = ccb_h->target_lun; 470 int request_flags = ATA_R_QUIET | ATA_R_ATAPI; 471 472 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, ("XPT_SCSI_IO\n")); 473 474 spin_lock_wr(&softc->state_lock); 475 if (softc->flags & DETACHING) { 476 ccb->ccb_h.status = CAM_REQ_ABORTED; 477 xpt_done(ccb); 478 spin_unlock_wr(&softc->state_lock); 479 return; 480 } 481 482 if (softc->atadev[tid] == NULL) { 483 ccb->ccb_h.status = CAM_DEV_NOT_THERE; 484 xpt_done(ccb); 485 spin_unlock_wr(&softc->state_lock); 486 return; 487 } 488 489 /* check that this request was not aborted already */ 490 if ((ccb_h->status & CAM_STATUS_MASK) != CAM_REQ_INPROG) { 491 kprintf("XPT_SCSI_IO received but already in progress?\n"); 492 xpt_done(ccb); 493 spin_unlock_wr(&softc->state_lock); 494 return; 495 } 496 if (lid > 0) { 497 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, 498 ("SCSI IO received for invalid lun %d\n", lid)); 499 goto action_invalid; 500 } 501 if (csio->cdb_len > sizeof request->u.atapi.ccb) { 502 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, 503 ("CAM CCB too long for ATAPI")); 504 goto action_invalid; 505 } 506 if ((ccb_h->flags & CAM_SCATTER_VALID)) { 507 /* scatter-gather not supported */ 508 xpt_print_path(ccb_h->path); 509 kprintf("ATAPI/CAM does not support scatter-gather yet!\n"); 510 goto action_invalid; 511 } 512 513 switch (ccb_h->flags & CAM_DIR_MASK) { 514 case CAM_DIR_IN: 515 request_flags |= ATA_R_READ; 516 break; 517 case CAM_DIR_OUT: 518 request_flags |= ATA_R_WRITE; 519 break; 520 case CAM_DIR_NONE: 521 /* No flags need to be set */ 522 break; 523 default: 524 device_printf(softc->dev, "unknown IO operation\n"); 525 goto action_invalid; 526 } 527 528 if ((hcb = allocate_hcb(softc, unit, bus, ccb)) == NULL) { 529 kprintf("cannot allocate ATAPI/CAM hcb\n"); 530 goto action_oom; 531 } 532 if ((request = ata_alloc_request()) == NULL) { 533 kprintf("cannot allocate ATAPI/CAM request\n"); 534 goto action_oom; 535 } 536 537 bcopy((ccb_h->flags & CAM_CDB_POINTER) ? 538 csio->cdb_io.cdb_ptr : csio->cdb_io.cdb_bytes, 539 request->u.atapi.ccb, csio->cdb_len); 540 #ifdef CAMDEBUG 541 if (CAM_DEBUGGED(ccb_h->path, CAM_DEBUG_CDB)) { 542 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 543 544 kprintf("atapi_action: hcb@%p: %s\n", hcb, 545 scsi_cdb_string(request->u.atapi.ccb, cdb_str, sizeof(cdb_str))); 546 } 547 if (CAM_DEBUGGED(ccb_h->path, CAM_DEBUG_SUBTRACE)) { 548 request_flags |= ATA_R_DEBUG; 549 } 550 #endif 551 552 len = csio->dxfer_len; 553 buf = csio->data_ptr; 554 555 /* some SCSI commands require special processing */ 556 switch (request->u.atapi.ccb[0]) { 557 case INQUIRY: { 558 /* 559 * many ATAPI devices seem to report more than 560 * SHORT_INQUIRY_LENGTH bytes of available INQUIRY 561 * information, but respond with some incorrect condition 562 * when actually asked for it, so we are going to pretend 563 * that only SHORT_INQUIRY_LENGTH are expected, anyway. 564 */ 565 struct scsi_inquiry *inq = (struct scsi_inquiry *) &request->u.atapi.ccb[0]; 566 567 if (inq->byte2 == 0 && inq->page_code == 0 && 568 inq->length > SHORT_INQUIRY_LENGTH) { 569 bzero(buf, len); 570 len = inq->length = SHORT_INQUIRY_LENGTH; 571 } 572 break; 573 } 574 case READ_6: 575 /* FALLTHROUGH */ 576 577 case WRITE_6: 578 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, 579 ("Translating %s into _10 equivalent\n", 580 (request->u.atapi.ccb[0] == READ_6) ? "READ_6" : "WRITE_6")); 581 request->u.atapi.ccb[0] |= 0x20; 582 request->u.atapi.ccb[9] = request->u.atapi.ccb[5]; 583 request->u.atapi.ccb[8] = request->u.atapi.ccb[4]; 584 request->u.atapi.ccb[7] = 0; 585 request->u.atapi.ccb[6] = 0; 586 request->u.atapi.ccb[5] = request->u.atapi.ccb[3]; 587 request->u.atapi.ccb[4] = request->u.atapi.ccb[2]; 588 request->u.atapi.ccb[3] = request->u.atapi.ccb[1] & 0x1f; 589 request->u.atapi.ccb[2] = 0; 590 request->u.atapi.ccb[1] = 0; 591 break; 592 } 593 594 if ((ccb_h->flags & CAM_DIR_MASK) == CAM_DIR_IN && (len & 1)) { 595 /* ATA always transfers an even number of bytes */ 596 buf = hcb->dxfer_alloc = 597 kmalloc(++len, M_ATACAM, M_INTWAIT | M_ZERO); 598 } 599 600 /* 601 * Don't allow DMA for requests with length not multiple of 16 bytes. 602 * Some ATAPI devices don't like it. 603 */ 604 if ((softc->atadev[tid]->mode >= ATA_DMA) && len > 0 && !(len & 15)) 605 request_flags |= ATA_R_DMA; 606 607 request->dev = softc->atadev[tid]->dev; 608 request->driver = hcb; 609 request->data = buf; 610 request->bytecount = len; 611 request->transfersize = min(request->bytecount, 612 min(softc->ata_ch->dma->max_iosize, 65534)); 613 request->timeout = ccb_h->timeout / 1000; /* XXX lost granularity */ 614 request->callback = &atapi_cb; 615 request->flags = request_flags; 616 617 /* 618 * no retries are to be performed at the ATA level; any retries 619 * will be done by CAM . 620 */ 621 request->retries = 0; 622 623 TAILQ_INSERT_TAIL(&softc->pending_hcbs, hcb, chain); 624 hcb->flags |= QUEUED; 625 ccb_h->status |= CAM_SIM_QUEUED; 626 spin_unlock_wr(&softc->state_lock); 627 628 ata_queue_request(request); 629 return; 630 } 631 632 default: 633 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, 634 ("unsupported function code 0x%02x\n", ccb_h->func_code)); 635 goto action_invalid; 636 } 637 638 /* NOTREACHED */ 639 640 action_oom: 641 if (request != NULL) 642 ata_free_request(request); 643 if (hcb != NULL) 644 free_hcb(hcb); 645 spin_unlock_wr(&softc->state_lock); 646 get_mplock(); 647 xpt_print_path(ccb_h->path); 648 kprintf("out of memory, freezing queue.\n"); 649 softc->flags |= RESOURCE_SHORTAGE; 650 xpt_freeze_simq(sim, /*count*/ 1); 651 rel_mplock(); 652 ccb_h->status = CAM_REQUEUE_REQ; 653 xpt_done(ccb); 654 return; 655 656 action_invalid: 657 spin_unlock_wr(&softc->state_lock); 658 ccb_h->status = CAM_REQ_INVALID; 659 xpt_done(ccb); 660 return; 661 } 662 663 static void 664 atapi_poll(struct cam_sim *sim) 665 { 666 /* do nothing - we do not actually service any interrupts */ 667 kprintf("atapi_poll called!\n"); 668 } 669 670 static void 671 atapi_cb(struct ata_request *request) 672 { 673 struct atapi_xpt_softc *scp; 674 struct atapi_hcb *hcb; 675 struct ccb_scsiio *csio; 676 u_int32_t rc; 677 678 hcb = (struct atapi_hcb *)request->driver; 679 scp = hcb->softc; 680 csio = &hcb->ccb->csio; 681 682 #ifdef CAMDEBUG 683 # define err (request->u.atapi.sense.key) 684 if (CAM_DEBUGGED(csio->ccb_h.path, CAM_DEBUG_CDB)) { 685 kprintf("atapi_cb: hcb@%p sense = %02x: sk = %01x%s%s%s\n", 686 hcb, err, err & 0x0f, 687 (err & 0x80) ? ", Filemark" : "", 688 (err & 0x40) ? ", EOM" : "", 689 (err & 0x20) ? ", ILI" : ""); 690 device_printf(request->dev, 691 "cmd %s status %02x result %02x error %02x\n", 692 ata_cmd2str(request), 693 request->status, request->result, request->error); 694 } 695 #endif 696 697 if ((hcb->flags & AUTOSENSE) != 0) { 698 rc = CAM_SCSI_STATUS_ERROR; 699 if (request->result == 0) { 700 csio->ccb_h.status |= CAM_AUTOSNS_VALID; 701 } 702 } else if (request->result != 0) { 703 if ((request->flags & ATA_R_TIMEOUT) != 0) { 704 rc = CAM_CMD_TIMEOUT; 705 } else { 706 rc = CAM_SCSI_STATUS_ERROR; 707 csio->scsi_status = SCSI_STATUS_CHECK_COND; 708 709 if ((csio->ccb_h.flags & CAM_DIS_AUTOSENSE) == 0) { 710 #if 0 711 static const int8_t ccb[16] = { ATAPI_REQUEST_SENSE, 0, 0, 0, 712 sizeof(struct atapi_sense), 0, 0, 0, 0, 0, 0, 713 0, 0, 0, 0, 0 }; 714 715 bcopy (ccb, request->u.atapi.ccb, sizeof ccb); 716 request->data = (caddr_t)&csio->sense_data; 717 request->bytecount = sizeof(struct atapi_sense); 718 request->transfersize = min(request->bytecount, 65534); 719 request->timeout = csio->ccb_h.timeout / 1000; 720 request->retries = 2; 721 request->flags = ATA_R_QUIET|ATA_R_ATAPI|ATA_R_IMMEDIATE; 722 hcb->flags |= AUTOSENSE; 723 724 ata_queue_request(request); 725 return; 726 #else 727 /* 728 * Use auto-sense data from the ATA layer, if it has 729 * issued a REQUEST SENSE automatically and that operation 730 * returned without error. 731 */ 732 if (request->u.atapi.sense.key != 0 && request->error == 0) { 733 bcopy (&request->u.atapi.sense, &csio->sense_data, sizeof(struct atapi_sense)); 734 csio->ccb_h.status |= CAM_AUTOSNS_VALID; 735 } 736 } 737 #endif 738 } 739 } else { 740 rc = CAM_REQ_CMP; 741 csio->scsi_status = SCSI_STATUS_OK; 742 if (((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) && 743 hcb->dxfer_alloc != NULL) 744 { 745 bcopy(hcb->dxfer_alloc, csio->data_ptr, csio->dxfer_len); 746 } 747 } 748 749 spin_lock_wr(&scp->state_lock); 750 free_hcb_and_ccb_done(hcb, rc); 751 spin_unlock_wr(&scp->state_lock); 752 753 ata_free_request(request); 754 } 755 756 static void 757 free_hcb_and_ccb_done(struct atapi_hcb *hcb, u_int32_t status) 758 { 759 struct atapi_xpt_softc *softc; 760 union ccb *ccb; 761 762 if (hcb == NULL) 763 return; 764 765 softc = hcb->softc; 766 ccb = hcb->ccb; 767 768 /* we're about to free a hcb, so the shortage has ended */ 769 if (softc->flags & RESOURCE_SHORTAGE) { 770 softc->flags &= ~RESOURCE_SHORTAGE; 771 status |= CAM_RELEASE_SIMQ; 772 } 773 free_hcb(hcb); 774 ccb->ccb_h.status = 775 status | (ccb->ccb_h.status & ~(CAM_STATUS_MASK | CAM_SIM_QUEUED)); 776 xpt_done(ccb); 777 } 778 779 static void 780 atapi_async(void *callback_arg, u_int32_t code, 781 struct cam_path* path, void *arg) 782 { 783 struct atapi_xpt_softc *softc; 784 struct cam_sim *sim; 785 int targ; 786 787 crit_enter(); 788 789 sim = (struct cam_sim *) callback_arg; 790 softc = (struct atapi_xpt_softc *) cam_sim_softc(sim); 791 switch (code) { 792 case AC_LOST_DEVICE: 793 targ = xpt_path_target_id(path); 794 xpt_print_path(path); 795 if (targ == -1) 796 kprintf("Lost host adapter\n"); 797 else 798 kprintf("Lost target %d???\n", targ); 799 break; 800 801 default: 802 break; 803 } 804 805 crit_exit(); 806 } 807 808 static void 809 cam_rescan_callback(struct cam_periph *periph, union ccb *ccb) 810 { 811 if (ccb->ccb_h.status != CAM_REQ_CMP) { 812 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, 813 ("Rescan failed, 0x%04x\n", ccb->ccb_h.status)); 814 } else { 815 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, 816 ("Rescan succeeded\n")); 817 } 818 xpt_free_path(ccb->ccb_h.path); 819 kfree(ccb, M_ATACAM); 820 } 821 822 static void 823 cam_rescan(struct cam_sim *sim) 824 { 825 struct cam_path *path; 826 union ccb *ccb = kmalloc(sizeof(union ccb), M_ATACAM, M_WAITOK | M_ZERO); 827 828 get_mplock(); 829 if (xpt_create_path(&path, xpt_periph, cam_sim_path(sim), 830 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) { 831 rel_mplock(); 832 kfree(ccb, M_ATACAM); 833 return; 834 } 835 836 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("Rescanning ATAPI bus.\n")); 837 xpt_setup_ccb(&ccb->ccb_h, path, 5/*priority (low)*/); 838 ccb->ccb_h.func_code = XPT_SCAN_BUS; 839 ccb->ccb_h.cbfcnp = cam_rescan_callback; 840 ccb->crcn.flags = CAM_FLAG_NONE; 841 xpt_action(ccb); 842 /* scan is in progress now */ 843 rel_mplock(); 844 } 845 846 static struct atapi_hcb * 847 allocate_hcb(struct atapi_xpt_softc *softc, int unit, int bus, union ccb *ccb) 848 { 849 struct atapi_hcb *hcb = (struct atapi_hcb *) 850 kmalloc(sizeof(struct atapi_hcb), M_ATACAM, M_INTWAIT | M_ZERO); 851 852 hcb->softc = softc; 853 hcb->unit = unit; 854 hcb->bus = bus; 855 hcb->ccb = ccb; 856 return hcb; 857 } 858 859 static void 860 free_hcb(struct atapi_hcb *hcb) 861 { 862 if ((hcb->flags & QUEUED) != 0) 863 TAILQ_REMOVE(&hcb->softc->pending_hcbs, hcb, chain); 864 if (hcb->dxfer_alloc != NULL) 865 kfree(hcb->dxfer_alloc, M_ATACAM); 866 kfree(hcb, M_ATACAM); 867 } 868 869 static void 870 free_softc(struct atapi_xpt_softc *scp) 871 { 872 struct atapi_hcb *hcb; 873 874 if (scp != NULL) { 875 spin_lock_wr(&scp->state_lock); 876 TAILQ_FOREACH(hcb, &scp->pending_hcbs, chain) { 877 free_hcb_and_ccb_done(hcb, CAM_UNREC_HBA_ERROR); 878 } 879 spin_unlock_wr(&scp->state_lock); 880 get_mplock(); 881 if (scp->path != NULL) { 882 setup_async_cb(scp, 0); 883 xpt_free_path(scp->path); 884 } 885 if ((scp->flags & BUS_REGISTERED) != 0) { 886 if (xpt_bus_deregister(cam_sim_path(scp->sim)) == CAM_REQ_CMP) 887 scp->flags &= ~BUS_REGISTERED; 888 } 889 if (scp->sim != NULL) { 890 if ((scp->flags & BUS_REGISTERED) == 0) 891 cam_sim_free(scp->sim); 892 else 893 kprintf("Can't free %s SIM (still registered)\n", 894 cam_sim_name(scp->sim)); 895 } 896 rel_mplock(); 897 spin_uninit(&scp->state_lock); 898 } 899 } 900 901 static int 902 atapi_cam_event_handler(module_t mod, int what, void *arg) { 903 device_t *devlist; 904 int devcount; 905 906 switch (what) { 907 case MOD_UNLOAD: 908 if (devclass_get_devices(atapi_cam_devclass, &devlist, &devcount) 909 != 0) 910 return ENXIO; 911 if (devlist != NULL) { 912 while (devlist != NULL && devcount > 0) { 913 device_t child = devlist[--devcount]; 914 struct atapi_xpt_softc *scp = device_get_softc(child); 915 916 device_delete_child(device_get_parent(child),child); 917 if (scp != NULL) 918 kfree(scp, M_ATACAM); 919 } 920 kfree(devlist, M_TEMP); 921 } 922 break; 923 924 default: 925 break; 926 } 927 return 0; 928 } 929