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 */ 30 31 #include "opt_ata.h" 32 #include "opt_scsi.h" 33 34 #include <sys/param.h> 35 #include <sys/bus.h> 36 #include <sys/libkern.h> 37 #include <sys/lock.h> /* for {get,rel}_mplock() */ 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 #include <sys/nata.h> 41 #include <sys/queue.h> 42 #include <sys/systm.h> 43 44 #include <sys/thread2.h> 45 #include <sys/mplock2.h> 46 47 #include <bus/cam/cam.h> 48 #include <bus/cam/cam_ccb.h> 49 #include <bus/cam/cam_periph.h> 50 #include <bus/cam/cam_sim.h> 51 #include <bus/cam/cam_xpt_sim.h> 52 #include <bus/cam/cam_debug.h> 53 #include <bus/cam/scsi/scsi_all.h> 54 55 #include "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 lock 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 { 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 DEVMETHOD_END 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 kmalloc(sizeof(struct atapi_xpt_softc), M_ATACAM, M_INTWAIT|M_ZERO); 151 device_t child; 152 153 if (scp == NULL) { 154 kprintf ("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 kprintf("atapi_cam_identify: out of memory, can't add child"); 162 kfree(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 lockinit(&scp->state_lock, "atapicamattach", 0, 0); 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, &sim_mplock, 1, 1, devq)) == NULL) { 215 error = ENOMEM; 216 goto out; 217 } 218 scp->sim = sim; 219 220 if (xpt_bus_register(sim, 0) != CAM_SUCCESS) { 221 error = EINVAL; 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 goto out; 231 } 232 scp->path = path; 233 234 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("Registered SIM for ata%d\n", unit)); 235 236 setup_async_cb(scp, AC_LOST_DEVICE); 237 reinit_bus(scp, ATTACH); 238 error = 0; 239 240 out: 241 if (error != 0) 242 free_softc(scp); 243 244 return(error); 245 } 246 247 static int 248 atapi_cam_detach(device_t dev) 249 { 250 struct atapi_xpt_softc *scp = device_get_softc(dev); 251 252 get_mplock(); 253 xpt_freeze_simq(scp->sim, 1 /*count*/); 254 rel_mplock(); 255 lockmgr(&scp->state_lock, LK_EXCLUSIVE); 256 scp->flags |= DETACHING; 257 lockmgr(&scp->state_lock, LK_RELEASE); 258 free_softc(scp); 259 return (0); 260 } 261 262 static int 263 atapi_cam_reinit(device_t dev) { 264 struct atapi_xpt_softc *scp = device_get_softc(dev); 265 266 /* 267 * scp might be null if the bus is being reinitialised during 268 * the boot-up sequence, before the ATAPI bus is registered. 269 */ 270 271 if (scp != NULL) { 272 reinit_bus(scp, RESET); 273 } 274 return 0; 275 } 276 277 static void 278 reinit_bus(struct atapi_xpt_softc *scp, enum reinit_reason reason) { 279 struct ata_device *old_atadev[2], *atadev; 280 device_t *children; 281 int nchildren, i, dev_changed; 282 283 if (device_get_children(scp->parent, &children, &nchildren) != 0) { 284 return; 285 } 286 287 lockmgr(&scp->state_lock, LK_EXCLUSIVE); 288 old_atadev[0] = scp->atadev[0]; 289 old_atadev[1] = scp->atadev[1]; 290 scp->atadev[0] = NULL; 291 scp->atadev[1] = NULL; 292 293 for (i = 0; i < nchildren; i++) { 294 /* XXX Does the child need to actually be attached yet? */ 295 if (children[i] != NULL) { 296 atadev = device_get_softc(children[i]); 297 if ((atadev->unit == ATA_MASTER) && 298 (scp->ata_ch->devices & ATA_ATAPI_MASTER) != 0) 299 scp->atadev[0] = atadev; 300 if ((atadev->unit == ATA_SLAVE) && 301 (scp->ata_ch->devices & ATA_ATAPI_SLAVE) != 0) 302 scp->atadev[1] = atadev; 303 } 304 } 305 dev_changed = (old_atadev[0] != scp->atadev[0]) 306 || (old_atadev[1] != scp->atadev[1]); 307 lockmgr(&scp->state_lock, LK_RELEASE); 308 kfree(children, M_TEMP); 309 310 switch (reason) { 311 case RESET: 312 xpt_async(AC_BUS_RESET, scp->path, NULL); 313 314 if (!dev_changed) 315 break; 316 317 /*FALLTHROUGH*/ 318 case ATTACH: 319 cam_rescan(scp->sim); 320 break; 321 } 322 } 323 324 static void 325 setup_async_cb(struct atapi_xpt_softc *scp, uint32_t events) 326 { 327 struct ccb_setasync csa; 328 329 get_mplock(); 330 xpt_setup_ccb(&csa.ccb_h, scp->path, /*priority*/ 5); 331 csa.ccb_h.func_code = XPT_SASYNC_CB; 332 csa.event_enable = events; 333 csa.callback = &atapi_async; 334 csa.callback_arg = scp->sim; 335 xpt_action((union ccb *) &csa); 336 rel_mplock(); 337 } 338 339 static void 340 atapi_action(struct cam_sim *sim, union ccb *ccb) 341 { 342 struct atapi_xpt_softc *softc = (struct atapi_xpt_softc*)cam_sim_softc(sim); 343 struct ccb_hdr *ccb_h = &ccb->ccb_h; 344 struct atapi_hcb *hcb = NULL; 345 struct ata_request *request = NULL; 346 int unit = cam_sim_unit(sim); 347 int bus = cam_sim_bus(sim); 348 int len; 349 char *buf; 350 351 switch (ccb_h->func_code) { 352 case XPT_PATH_INQ: { 353 struct ccb_pathinq *cpi = &ccb->cpi; 354 int tid = ccb_h->target_id; 355 356 cpi->version_num = 1; 357 cpi->hba_inquiry = 0; 358 cpi->target_sprt = 0; 359 cpi->hba_misc = PIM_NO_6_BYTE; 360 cpi->hba_eng_cnt = 0; 361 bzero(cpi->vuhba_flags, sizeof(cpi->vuhba_flags)); 362 cpi->max_target = 1; 363 cpi->max_lun = 0; 364 cpi->async_flags = 0; 365 cpi->hpath_id = 0; 366 cpi->initiator_id = 7; 367 strncpy(cpi->sim_vid, "FreeBSD", sizeof(cpi->sim_vid)); 368 strncpy(cpi->hba_vid, "ATAPI", sizeof(cpi->hba_vid)); 369 strncpy(cpi->dev_name, cam_sim_name(sim), sizeof cpi->dev_name); 370 cpi->unit_number = cam_sim_unit(sim); 371 cpi->bus_id = cam_sim_bus(sim); 372 cpi->base_transfer_speed = 3300; 373 cpi->transport = XPORT_ATA; 374 cpi->transport_version = 2; 375 cpi->protocol = PROTO_SCSI; 376 cpi->protocol_version = SCSI_REV_2; 377 378 if (softc->ata_ch && tid != CAM_TARGET_WILDCARD) { 379 lockmgr(&softc->state_lock, LK_EXCLUSIVE); 380 if (softc->atadev[tid] == NULL) { 381 ccb->ccb_h.status = CAM_DEV_NOT_THERE; 382 xpt_done(ccb); 383 lockmgr(&softc->state_lock, LK_RELEASE); 384 return; 385 } 386 switch (softc->atadev[ccb_h->target_id]->mode) { 387 case ATA_PIO1: 388 cpi->base_transfer_speed = 5200; 389 break; 390 case ATA_PIO2: 391 cpi->base_transfer_speed = 7000; 392 break; 393 case ATA_PIO3: 394 cpi->base_transfer_speed = 11000; 395 break; 396 case ATA_PIO4: 397 case ATA_DMA: 398 case ATA_WDMA2: 399 cpi->base_transfer_speed = 16000; 400 break; 401 case ATA_UDMA2: 402 cpi->base_transfer_speed = 33000; 403 break; 404 case ATA_UDMA4: 405 cpi->base_transfer_speed = 66000; 406 break; 407 case ATA_UDMA5: 408 cpi->base_transfer_speed = 100000; 409 break; 410 case ATA_UDMA6: 411 cpi->base_transfer_speed = 133000; 412 break; 413 default: 414 break; 415 } 416 lockmgr(&softc->state_lock, LK_RELEASE); 417 } 418 ccb->ccb_h.status = CAM_REQ_CMP; 419 xpt_done(ccb); 420 return; 421 } 422 423 case XPT_RESET_DEV: { 424 int tid = ccb_h->target_id; 425 426 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("dev reset\n")); 427 ata_controlcmd(softc->atadev[tid]->dev, ATA_DEVICE_RESET, 0, 0, 0); 428 ccb->ccb_h.status = CAM_REQ_CMP; 429 xpt_done(ccb); 430 return; 431 } 432 433 case XPT_RESET_BUS: 434 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("bus reset\n")); 435 ata_reinit(softc->parent); 436 ccb->ccb_h.status = CAM_REQ_CMP; 437 xpt_done(ccb); 438 return; 439 440 case XPT_SET_TRAN_SETTINGS: 441 /* ignore these, we're not doing SCSI here */ 442 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, 443 ("SET_TRAN_SETTINGS not supported\n")); 444 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 445 xpt_done(ccb); 446 return; 447 448 case XPT_GET_TRAN_SETTINGS: { 449 struct ccb_trans_settings *cts = &ccb->cts; 450 cts->protocol = PROTO_SCSI; 451 cts->protocol_version = SCSI_REV_2; 452 cts->transport = XPORT_ATA; 453 cts->transport_version = XPORT_VERSION_UNSPECIFIED; 454 cts->proto_specific.valid = 0; 455 cts->xport_specific.valid = 0; 456 /* nothing more to do */ 457 ccb->ccb_h.status = CAM_REQ_CMP; 458 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("GET_TRAN_SETTINGS\n")); 459 xpt_done(ccb); 460 return; 461 } 462 463 case XPT_CALC_GEOMETRY: { 464 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("CALC_GEOMETRY\n")); 465 cam_calc_geometry(&ccb->ccg, /*extended*/1); 466 xpt_done(ccb); 467 return; 468 } 469 470 case XPT_SCSI_IO: { 471 struct ccb_scsiio *csio = &ccb->csio; 472 int tid = ccb_h->target_id, lid = ccb_h->target_lun; 473 int request_flags = ATA_R_QUIET | ATA_R_ATAPI; 474 475 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, ("XPT_SCSI_IO\n")); 476 477 lockmgr(&softc->state_lock, LK_EXCLUSIVE); 478 if (softc->flags & DETACHING) { 479 ccb->ccb_h.status = CAM_REQ_ABORTED; 480 xpt_done(ccb); 481 lockmgr(&softc->state_lock, LK_RELEASE); 482 return; 483 } 484 485 if (softc->atadev[tid] == NULL) { 486 ccb->ccb_h.status = CAM_DEV_NOT_THERE; 487 xpt_done(ccb); 488 lockmgr(&softc->state_lock, LK_RELEASE); 489 return; 490 } 491 492 /* check that this request was not aborted already */ 493 if ((ccb_h->status & CAM_STATUS_MASK) != CAM_REQ_INPROG) { 494 kprintf("XPT_SCSI_IO received but already in progress?\n"); 495 xpt_done(ccb); 496 lockmgr(&softc->state_lock, LK_RELEASE); 497 return; 498 } 499 if (lid > 0) { 500 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, 501 ("SCSI IO received for invalid lun %d\n", lid)); 502 goto action_invalid; 503 } 504 if (csio->cdb_len > sizeof request->u.atapi.ccb) { 505 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, 506 ("CAM CCB too long for ATAPI")); 507 goto action_invalid; 508 } 509 if ((ccb_h->flags & CAM_SCATTER_VALID)) { 510 /* scatter-gather not supported */ 511 xpt_print_path(ccb_h->path); 512 kprintf("ATAPI/CAM does not support scatter-gather yet!\n"); 513 goto action_invalid; 514 } 515 516 switch (ccb_h->flags & CAM_DIR_MASK) { 517 case CAM_DIR_IN: 518 request_flags |= ATA_R_READ; 519 break; 520 case CAM_DIR_OUT: 521 request_flags |= ATA_R_WRITE; 522 break; 523 case CAM_DIR_NONE: 524 /* No flags need to be set */ 525 break; 526 default: 527 device_printf(softc->dev, "unknown IO operation\n"); 528 goto action_invalid; 529 } 530 531 if ((hcb = allocate_hcb(softc, unit, bus, ccb)) == NULL) { 532 kprintf("cannot allocate ATAPI/CAM hcb\n"); 533 goto action_oom; 534 } 535 if ((request = ata_alloc_request()) == NULL) { 536 kprintf("cannot allocate ATAPI/CAM request\n"); 537 goto action_oom; 538 } 539 540 bcopy((ccb_h->flags & CAM_CDB_POINTER) ? 541 csio->cdb_io.cdb_ptr : csio->cdb_io.cdb_bytes, 542 request->u.atapi.ccb, csio->cdb_len); 543 #ifdef CAMDEBUG 544 if (CAM_DEBUGGED(ccb_h->path, CAM_DEBUG_CDB)) { 545 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 546 547 kprintf("atapi_action: hcb@%p: %s\n", hcb, 548 scsi_cdb_string(request->u.atapi.ccb, cdb_str, sizeof(cdb_str))); 549 } 550 if (CAM_DEBUGGED(ccb_h->path, CAM_DEBUG_SUBTRACE)) { 551 request_flags |= ATA_R_DEBUG; 552 } 553 #endif 554 555 len = csio->dxfer_len; 556 buf = csio->data_ptr; 557 558 /* some SCSI commands require special processing */ 559 switch (request->u.atapi.ccb[0]) { 560 case INQUIRY: { 561 /* 562 * many ATAPI devices seem to report more than 563 * SHORT_INQUIRY_LENGTH bytes of available INQUIRY 564 * information, but respond with some incorrect condition 565 * when actually asked for it, so we are going to pretend 566 * that only SHORT_INQUIRY_LENGTH are expected, anyway. 567 */ 568 struct scsi_inquiry *inq = (struct scsi_inquiry *) &request->u.atapi.ccb[0]; 569 570 if (inq->byte2 == 0 && inq->page_code == 0 && 571 inq->length > SHORT_INQUIRY_LENGTH) { 572 bzero(buf, len); 573 len = inq->length = SHORT_INQUIRY_LENGTH; 574 } 575 break; 576 } 577 case READ_6: 578 /* FALLTHROUGH */ 579 580 case WRITE_6: 581 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, 582 ("Translating %s into _10 equivalent\n", 583 (request->u.atapi.ccb[0] == READ_6) ? "READ_6" : "WRITE_6")); 584 request->u.atapi.ccb[0] |= 0x20; 585 request->u.atapi.ccb[9] = request->u.atapi.ccb[5]; 586 request->u.atapi.ccb[8] = request->u.atapi.ccb[4]; 587 request->u.atapi.ccb[7] = 0; 588 request->u.atapi.ccb[6] = 0; 589 request->u.atapi.ccb[5] = request->u.atapi.ccb[3]; 590 request->u.atapi.ccb[4] = request->u.atapi.ccb[2]; 591 request->u.atapi.ccb[3] = request->u.atapi.ccb[1] & 0x1f; 592 request->u.atapi.ccb[2] = 0; 593 request->u.atapi.ccb[1] = 0; 594 break; 595 } 596 597 if ((ccb_h->flags & CAM_DIR_MASK) == CAM_DIR_IN && (len & 1)) { 598 /* ATA always transfers an even number of bytes */ 599 if ((buf = hcb->dxfer_alloc 600 = kmalloc(++len, M_ATACAM, M_INTWAIT | M_ZERO)) == NULL) { 601 kprintf("cannot allocate ATAPI/CAM buffer\n"); 602 goto action_oom; 603 } 604 } 605 606 /* 607 * Don't allow DMA for requests with length not multiple of 16 bytes. 608 * Some ATAPI devices don't like it. 609 */ 610 if ((softc->atadev[tid]->mode >= ATA_DMA) && len > 0 && !(len & 15)) 611 request_flags |= ATA_R_DMA; 612 613 request->dev = softc->atadev[tid]->dev; 614 request->driver = hcb; 615 request->data = buf; 616 request->bytecount = len; 617 request->transfersize = min(request->bytecount, 618 min(softc->ata_ch->dma->max_iosize, 65534)); 619 request->timeout = ccb_h->timeout / 1000; /* XXX lost granularity */ 620 request->callback = &atapi_cb; 621 request->flags = request_flags; 622 623 /* 624 * no retries are to be performed at the ATA level; any retries 625 * will be done by CAM . 626 */ 627 request->retries = 0; 628 629 TAILQ_INSERT_TAIL(&softc->pending_hcbs, hcb, chain); 630 hcb->flags |= QUEUED; 631 ccb_h->status |= CAM_SIM_QUEUED; 632 lockmgr(&softc->state_lock, LK_RELEASE); 633 634 ata_queue_request(request); 635 return; 636 } 637 638 default: 639 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, 640 ("unsupported function code 0x%02x\n", ccb_h->func_code)); 641 goto action_invalid; 642 } 643 644 /* NOTREACHED */ 645 646 action_oom: 647 if (request != NULL) 648 ata_free_request(request); 649 if (hcb != NULL) 650 free_hcb(hcb); 651 lockmgr(&softc->state_lock, LK_RELEASE); 652 get_mplock(); 653 xpt_print_path(ccb_h->path); 654 kprintf("out of memory, freezing queue.\n"); 655 softc->flags |= RESOURCE_SHORTAGE; 656 xpt_freeze_simq(sim, /*count*/ 1); 657 rel_mplock(); 658 ccb_h->status = CAM_REQUEUE_REQ; 659 xpt_done(ccb); 660 return; 661 662 action_invalid: 663 lockmgr(&softc->state_lock, LK_RELEASE); 664 ccb_h->status = CAM_REQ_INVALID; 665 xpt_done(ccb); 666 return; 667 } 668 669 static void 670 atapi_poll(struct cam_sim *sim) 671 { 672 /* do nothing - we do not actually service any interrupts */ 673 kprintf("atapi_poll called!\n"); 674 } 675 676 static void 677 atapi_cb(struct ata_request *request) 678 { 679 struct atapi_xpt_softc *scp; 680 struct atapi_hcb *hcb; 681 struct ccb_scsiio *csio; 682 u_int32_t rc; 683 684 hcb = (struct atapi_hcb *)request->driver; 685 scp = hcb->softc; 686 csio = &hcb->ccb->csio; 687 688 #ifdef CAMDEBUG 689 # define err (request->u.atapi.sense.key) 690 if (CAM_DEBUGGED(csio->ccb_h.path, CAM_DEBUG_CDB)) { 691 kprintf("atapi_cb: hcb@%p sense = %02x: sk = %01x%s%s%s\n", 692 hcb, err, err & 0x0f, 693 (err & 0x80) ? ", Filemark" : "", 694 (err & 0x40) ? ", EOM" : "", 695 (err & 0x20) ? ", ILI" : ""); 696 device_printf(request->dev, 697 "cmd %s status %02x result %02x error %02x\n", 698 ata_cmd2str(request), 699 request->status, request->result, request->error); 700 } 701 #endif 702 703 if ((hcb->flags & AUTOSENSE) != 0) { 704 rc = CAM_SCSI_STATUS_ERROR; 705 if (request->result == 0) { 706 csio->ccb_h.status |= CAM_AUTOSNS_VALID; 707 } 708 } else if (request->result != 0) { 709 if ((request->flags & ATA_R_TIMEOUT) != 0) { 710 rc = CAM_CMD_TIMEOUT; 711 } else { 712 rc = CAM_SCSI_STATUS_ERROR; 713 csio->scsi_status = SCSI_STATUS_CHECK_COND; 714 715 if ((csio->ccb_h.flags & CAM_DIS_AUTOSENSE) == 0) { 716 #if 0 717 static const int8_t ccb[16] = { ATAPI_REQUEST_SENSE, 0, 0, 0, 718 sizeof(struct atapi_sense), 0, 0, 0, 0, 0, 0, 719 0, 0, 0, 0, 0 }; 720 721 bcopy (ccb, request->u.atapi.ccb, sizeof ccb); 722 request->data = (caddr_t)&csio->sense_data; 723 request->bytecount = sizeof(struct atapi_sense); 724 request->transfersize = min(request->bytecount, 65534); 725 request->timeout = csio->ccb_h.timeout / 1000; 726 request->retries = 2; 727 request->flags = ATA_R_QUIET|ATA_R_ATAPI|ATA_R_IMMEDIATE; 728 hcb->flags |= AUTOSENSE; 729 730 ata_queue_request(request); 731 return; 732 #else 733 /* 734 * Use auto-sense data from the ATA layer, if it has 735 * issued a REQUEST SENSE automatically and that operation 736 * returned without error. 737 */ 738 if (request->u.atapi.sense.key != 0 && request->error == 0) { 739 bcopy (&request->u.atapi.sense, &csio->sense_data, sizeof(struct atapi_sense)); 740 csio->ccb_h.status |= CAM_AUTOSNS_VALID; 741 } 742 } 743 #endif 744 } 745 } else { 746 rc = CAM_REQ_CMP; 747 csio->scsi_status = SCSI_STATUS_OK; 748 if (((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) && 749 hcb->dxfer_alloc != NULL) 750 { 751 bcopy(hcb->dxfer_alloc, csio->data_ptr, csio->dxfer_len); 752 } 753 } 754 755 lockmgr(&scp->state_lock, LK_EXCLUSIVE); 756 free_hcb_and_ccb_done(hcb, rc); 757 lockmgr(&scp->state_lock, LK_RELEASE); 758 759 ata_free_request(request); 760 } 761 762 static void 763 free_hcb_and_ccb_done(struct atapi_hcb *hcb, u_int32_t status) 764 { 765 struct atapi_xpt_softc *softc; 766 union ccb *ccb; 767 768 if (hcb == NULL) 769 return; 770 771 softc = hcb->softc; 772 ccb = hcb->ccb; 773 774 /* we're about to free a hcb, so the shortage has ended */ 775 if (softc->flags & RESOURCE_SHORTAGE) { 776 softc->flags &= ~RESOURCE_SHORTAGE; 777 status |= CAM_RELEASE_SIMQ; 778 } 779 free_hcb(hcb); 780 ccb->ccb_h.status = 781 status | (ccb->ccb_h.status & ~(CAM_STATUS_MASK | CAM_SIM_QUEUED)); 782 xpt_done(ccb); 783 } 784 785 static void 786 atapi_async(void *callback_arg, u_int32_t code, 787 struct cam_path* path, void *arg) 788 { 789 int targ; 790 791 crit_enter(); 792 793 switch (code) { 794 case AC_LOST_DEVICE: 795 targ = xpt_path_target_id(path); 796 xpt_print_path(path); 797 if (targ == -1) 798 kprintf("Lost host adapter\n"); 799 else 800 kprintf("Lost target %d???\n", targ); 801 break; 802 803 default: 804 break; 805 } 806 807 crit_exit(); 808 } 809 810 static void 811 cam_rescan_callback(struct cam_periph *periph, union ccb *ccb) 812 { 813 if (ccb->ccb_h.status != CAM_REQ_CMP) { 814 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, 815 ("Rescan failed, 0x%04x\n", ccb->ccb_h.status)); 816 } else { 817 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, 818 ("Rescan succeeded\n")); 819 } 820 xpt_free_path(ccb->ccb_h.path); 821 kfree(ccb, M_ATACAM); 822 } 823 824 static void 825 cam_rescan(struct cam_sim *sim) 826 { 827 struct cam_path *path; 828 union ccb *ccb = kmalloc(sizeof(union ccb), M_ATACAM, M_WAITOK | M_ZERO); 829 830 get_mplock(); 831 if (xpt_create_path(&path, xpt_periph, cam_sim_path(sim), 832 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) { 833 rel_mplock(); 834 kfree(ccb, M_ATACAM); 835 return; 836 } 837 838 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("Rescanning ATAPI bus.\n")); 839 xpt_setup_ccb(&ccb->ccb_h, path, 5/*priority (low)*/); 840 ccb->ccb_h.func_code = XPT_SCAN_BUS; 841 ccb->ccb_h.cbfcnp = cam_rescan_callback; 842 ccb->crcn.flags = CAM_FLAG_NONE; 843 xpt_action(ccb); 844 /* scan is in progress now */ 845 rel_mplock(); 846 } 847 848 static struct atapi_hcb * 849 allocate_hcb(struct atapi_xpt_softc *softc, int unit, int bus, union ccb *ccb) 850 { 851 struct atapi_hcb *hcb = (struct atapi_hcb *) 852 kmalloc(sizeof(struct atapi_hcb), M_ATACAM, M_INTWAIT | M_ZERO); 853 854 hcb->softc = softc; 855 hcb->unit = unit; 856 hcb->bus = bus; 857 hcb->ccb = ccb; 858 return hcb; 859 } 860 861 static void 862 free_hcb(struct atapi_hcb *hcb) 863 { 864 if ((hcb->flags & QUEUED) != 0) 865 TAILQ_REMOVE(&hcb->softc->pending_hcbs, hcb, chain); 866 if (hcb->dxfer_alloc != NULL) 867 kfree(hcb->dxfer_alloc, M_ATACAM); 868 kfree(hcb, M_ATACAM); 869 } 870 871 static void 872 free_softc(struct atapi_xpt_softc *scp) 873 { 874 struct atapi_hcb *hcb; 875 876 if (scp != NULL) { 877 lockmgr(&scp->state_lock, LK_EXCLUSIVE); 878 TAILQ_FOREACH(hcb, &scp->pending_hcbs, chain) { 879 free_hcb_and_ccb_done(hcb, CAM_UNREC_HBA_ERROR); 880 } 881 lockmgr(&scp->state_lock, LK_RELEASE); 882 get_mplock(); 883 if (scp->path != NULL) { 884 setup_async_cb(scp, 0); 885 xpt_free_path(scp->path); 886 } 887 if ((scp->flags & BUS_REGISTERED) != 0) { 888 if (xpt_bus_deregister(cam_sim_path(scp->sim)) == CAM_REQ_CMP) 889 scp->flags &= ~BUS_REGISTERED; 890 } 891 if (scp->sim != NULL) { 892 if ((scp->flags & BUS_REGISTERED) == 0) 893 cam_sim_free(scp->sim); 894 else 895 kprintf("Can't free %s SIM (still registered)\n", 896 cam_sim_name(scp->sim)); 897 } 898 rel_mplock(); 899 lockuninit(&scp->state_lock); 900 } 901 } 902 903 static int 904 atapi_cam_event_handler(module_t mod, int what, void *arg) { 905 device_t *devlist; 906 int devcount; 907 908 switch (what) { 909 case MOD_UNLOAD: 910 if (devclass_get_devices(atapi_cam_devclass, &devlist, &devcount) 911 != 0) 912 return ENXIO; 913 if (devlist != NULL) { 914 while (devlist != NULL && devcount > 0) { 915 device_t child = devlist[--devcount]; 916 struct atapi_xpt_softc *scp = device_get_softc(child); 917 918 device_delete_child(device_get_parent(child),child); 919 if (scp != NULL) 920 kfree(scp, M_ATACAM); 921 } 922 kfree(devlist, M_TEMP); 923 } 924 break; 925 926 default: 927 break; 928 } 929 return 0; 930 } 931