1 /*- 2 * Copyright (c) 2002 Adaptec, Inc. 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 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/sys/dev/aac/aac_cam.c,v 1.2.2.4 2003/04/08 13:22:08 scottl Exp $ 27 * $DragonFly: src/sys/dev/raid/aac/aac_cam.c,v 1.10 2008/05/18 20:30:23 pavalos Exp $ 28 */ 29 30 /* 31 * CAM front-end for communicating with non-DASD devices 32 */ 33 34 #include "opt_aac.h" 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/kernel.h> 39 #include <sys/sysctl.h> 40 #include <sys/malloc.h> 41 #include <sys/module.h> 42 43 #include <bus/cam/cam.h> 44 #include <bus/cam/cam_ccb.h> 45 #include <bus/cam/cam_debug.h> 46 #include <bus/cam/cam_sim.h> 47 #include <bus/cam/cam_xpt_sim.h> 48 #include <bus/cam/scsi/scsi_all.h> 49 #include <bus/cam/scsi/scsi_message.h> 50 51 #include <sys/bus.h> 52 #include <sys/conf.h> 53 #include <sys/devicestat.h> 54 #include <sys/disk.h> 55 #include <sys/rman.h> 56 57 #include <machine/md_var.h> 58 59 #include <sys/mplock2.h> 60 61 #include <vm/vm.h> 62 #include <vm/pmap.h> 63 64 #include "aacreg.h" 65 #include "aac_ioctl.h" 66 #include "aacvar.h" 67 68 struct aac_cam { 69 device_t dev; 70 struct aac_sim *inf; 71 struct cam_sim *sim; 72 struct cam_path *path; 73 }; 74 75 static int aac_cam_probe(device_t dev); 76 static int aac_cam_attach(device_t dev); 77 static int aac_cam_detach(device_t dev); 78 static void aac_cam_action(struct cam_sim *, union ccb *); 79 static void aac_cam_poll(struct cam_sim *); 80 static void aac_cam_complete(struct aac_command *); 81 static u_int32_t aac_cam_reset_bus(struct cam_sim *, union ccb *); 82 static u_int32_t aac_cam_abort_ccb(struct cam_sim *, union ccb *); 83 static u_int32_t aac_cam_term_io(struct cam_sim *, union ccb *); 84 85 static devclass_t aac_pass_devclass; 86 87 static device_method_t aac_pass_methods[] = { 88 DEVMETHOD(device_probe, aac_cam_probe), 89 DEVMETHOD(device_attach, aac_cam_attach), 90 DEVMETHOD(device_detach, aac_cam_detach), 91 { 0, 0 } 92 }; 93 94 static driver_t aac_pass_driver = { 95 "aacp", 96 aac_pass_methods, 97 sizeof(struct aac_cam) 98 }; 99 100 DRIVER_MODULE(aacp, aac, aac_pass_driver, aac_pass_devclass, 0, 0); 101 MODULE_DEPEND(aacp, cam, 1, 1, 1); 102 103 MALLOC_DEFINE(M_AACCAM, "aaccam", "AAC CAM info"); 104 105 static void 106 aac_cam_event(struct aac_softc *sc, struct aac_event *event, void *arg) 107 { 108 struct aac_cam *camsc; 109 110 switch (event->ev_type) { 111 case AAC_EVENT_CMFREE: 112 camsc = arg; 113 kfree(event, M_AACCAM); 114 xpt_release_simq(camsc->sim, 1); 115 break; 116 default: 117 device_printf(sc->aac_dev, "unknown event %d in aac_cam\n", 118 event->ev_type); 119 break; 120 } 121 122 return; 123 } 124 125 static int 126 aac_cam_probe(device_t dev) 127 { 128 debug_called(2); 129 130 return (0); 131 } 132 133 static int 134 aac_cam_detach(device_t dev) 135 { 136 struct aac_cam *camsc; 137 debug_called(2); 138 139 camsc = (struct aac_cam *)device_get_softc(dev); 140 141 get_mplock(); 142 143 xpt_async(AC_LOST_DEVICE, camsc->path, NULL); 144 xpt_free_path(camsc->path); 145 xpt_bus_deregister(cam_sim_path(camsc->sim)); 146 cam_sim_free(camsc->sim); 147 148 rel_mplock(); 149 150 return (0); 151 } 152 153 /* 154 * Register the driver as a CAM SIM 155 */ 156 static int 157 aac_cam_attach(device_t dev) 158 { 159 struct cam_devq *devq; 160 struct cam_sim *sim; 161 struct cam_path *path; 162 struct aac_cam *camsc; 163 struct aac_sim *inf; 164 165 debug_called(1); 166 167 camsc = (struct aac_cam *)device_get_softc(dev); 168 inf = (struct aac_sim *)device_get_ivars(dev); 169 camsc->inf = inf; 170 171 devq = cam_simq_alloc(inf->TargetsPerBus); 172 if (devq == NULL) 173 return (EIO); 174 175 sim = cam_sim_alloc(aac_cam_action, aac_cam_poll, "aacp", camsc, 176 device_get_unit(dev), &sim_mplock, 1, 1, devq); 177 cam_simq_release(devq); 178 if (sim == NULL) { 179 return (EIO); 180 } 181 182 /* Since every bus has it's own sim, every bus 'appears' as bus 0 */ 183 if (xpt_bus_register(sim, 0) != CAM_SUCCESS) { 184 cam_sim_free(sim); 185 return (EIO); 186 } 187 188 if (xpt_create_path(&path, NULL, cam_sim_path(sim), 189 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) { 190 xpt_bus_deregister(cam_sim_path(sim)); 191 cam_sim_free(sim); 192 return (EIO); 193 } 194 195 camsc->sim = sim; 196 camsc->path = path; 197 198 return (0); 199 } 200 201 static void 202 aac_cam_action(struct cam_sim *sim, union ccb *ccb) 203 { 204 struct aac_cam *camsc; 205 struct aac_softc *sc; 206 struct aac_srb32 *srb; 207 struct aac_fib *fib; 208 struct aac_command *cm; 209 210 debug_called(2); 211 212 camsc = (struct aac_cam *)cam_sim_softc(sim); 213 sc = camsc->inf->aac_sc; 214 215 /* Synchronous ops, and ops that don't require communication with the 216 * controller */ 217 switch(ccb->ccb_h.func_code) { 218 case XPT_SCSI_IO: 219 case XPT_RESET_DEV: 220 /* These are handled down below */ 221 break; 222 case XPT_CALC_GEOMETRY: 223 { 224 struct ccb_calc_geometry *ccg; 225 u_int32_t size_mb; 226 u_int32_t secs_per_cylinder; 227 228 ccg = &ccb->ccg; 229 size_mb = ccg->volume_size / 230 ((1024L * 1024L) / ccg->block_size); 231 if (size_mb >= (2 * 1024)) { /* 2GB */ 232 ccg->heads = 255; 233 ccg->secs_per_track = 63; 234 } else if (size_mb >= (1 * 1024)) { /* 1GB */ 235 ccg->heads = 128; 236 ccg->secs_per_track = 32; 237 } else { 238 ccg->heads = 64; 239 ccg->secs_per_track = 32; 240 } 241 secs_per_cylinder = ccg->heads * ccg->secs_per_track; 242 ccg->cylinders = ccg->volume_size / secs_per_cylinder; 243 244 ccb->ccb_h.status = CAM_REQ_CMP; 245 xpt_done(ccb); 246 return; 247 } 248 case XPT_PATH_INQ: 249 { 250 struct ccb_pathinq *cpi = &ccb->cpi; 251 252 cpi->version_num = 1; 253 cpi->hba_inquiry = PI_WIDE_16; 254 cpi->target_sprt = 0; 255 256 /* Resetting via the passthrough causes problems. */ 257 cpi->hba_misc = PIM_NOBUSRESET; 258 cpi->hba_eng_cnt = 0; 259 cpi->max_target = camsc->inf->TargetsPerBus; 260 cpi->max_lun = 8; /* Per the controller spec */ 261 cpi->initiator_id = camsc->inf->InitiatorBusId; 262 cpi->bus_id = camsc->inf->BusNumber; 263 cpi->base_transfer_speed = 3300; 264 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 265 strncpy(cpi->hba_vid, "Adaptec", HBA_IDLEN); 266 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN); 267 cpi->unit_number = cam_sim_unit(sim); 268 cpi->transport = XPORT_SPI; 269 cpi->transport_version = 2; 270 cpi->protocol = PROTO_SCSI; 271 cpi->protocol_version = SCSI_REV_2; 272 ccb->ccb_h.status = CAM_REQ_CMP; 273 xpt_done(ccb); 274 return; 275 } 276 case XPT_GET_TRAN_SETTINGS: 277 { 278 struct ccb_trans_settings_scsi *scsi = 279 &ccb->cts.proto_specific.scsi; 280 struct ccb_trans_settings_spi *spi = 281 &ccb->cts.xport_specific.spi; 282 ccb->cts.protocol = PROTO_SCSI; 283 ccb->cts.protocol_version = SCSI_REV_2; 284 ccb->cts.transport = XPORT_SPI; 285 ccb->cts.transport_version = 2; 286 if (ccb->ccb_h.target_lun != CAM_LUN_WILDCARD) { 287 scsi->valid = CTS_SCSI_VALID_TQ; 288 spi->valid |= CTS_SPI_VALID_DISC; 289 } else { 290 scsi->valid = 0; 291 } 292 ccb->ccb_h.status = CAM_REQ_CMP; 293 xpt_done(ccb); 294 return; 295 } 296 case XPT_SET_TRAN_SETTINGS: 297 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 298 xpt_done(ccb); 299 return; 300 case XPT_RESET_BUS: 301 if (!(sc->flags & AAC_FLAGS_CAM_NORESET)) { 302 ccb->ccb_h.status = aac_cam_reset_bus(sim, ccb); 303 } else { 304 ccb->ccb_h.status = CAM_REQ_CMP; 305 } 306 xpt_done(ccb); 307 return; 308 case XPT_ABORT: 309 ccb->ccb_h.status = aac_cam_abort_ccb(sim, ccb); 310 xpt_done(ccb); 311 return; 312 case XPT_TERM_IO: 313 ccb->ccb_h.status = aac_cam_term_io(sim, ccb); 314 xpt_done(ccb); 315 return; 316 default: 317 device_printf(sc->aac_dev, "Unsupported command 0x%x\n", 318 ccb->ccb_h.func_code); 319 ccb->ccb_h.status = CAM_PROVIDE_FAIL; 320 xpt_done(ccb); 321 return; 322 } 323 324 /* Async ops that require communcation with the controller */ 325 326 AAC_LOCK_ACQUIRE(&sc->aac_io_lock); 327 if (aac_alloc_command(sc, &cm)) { 328 struct aac_event *event; 329 330 xpt_freeze_simq(sim, 1); 331 ccb->ccb_h.status = CAM_REQUEUE_REQ; 332 xpt_done(ccb); 333 event = kmalloc(sizeof(struct aac_event), M_AACCAM, 334 M_INTWAIT | M_ZERO); 335 event->ev_callback = aac_cam_event; 336 event->ev_arg = camsc; 337 event->ev_type = AAC_EVENT_CMFREE; 338 aac_add_event(sc, event); 339 AAC_LOCK_RELEASE(&sc->aac_io_lock); 340 return; 341 } 342 343 fib = cm->cm_fib; 344 srb = (struct aac_srb32 *)&fib->data[0]; 345 cm->cm_datalen = 0; 346 347 switch (ccb->ccb_h.flags & CAM_DIR_MASK) { 348 case CAM_DIR_IN: 349 srb->flags = AAC_SRB_FLAGS_DATA_IN; 350 cm->cm_flags |= AAC_CMD_DATAIN; 351 break; 352 case CAM_DIR_OUT: 353 srb->flags = AAC_SRB_FLAGS_DATA_OUT; 354 cm->cm_flags |= AAC_CMD_DATAOUT; 355 break; 356 case CAM_DIR_NONE: 357 srb->flags = AAC_SRB_FLAGS_NO_DATA_XFER; 358 break; 359 default: 360 srb->flags = AAC_SRB_FLAGS_UNSPECIFIED_DIRECTION; 361 cm->cm_flags |= AAC_CMD_DATAIN | AAC_CMD_DATAOUT; 362 break; 363 } 364 365 switch(ccb->ccb_h.func_code) { 366 case XPT_SCSI_IO: 367 { 368 struct ccb_scsiio *csio = &ccb->csio; 369 370 srb->function = AAC_SRB_FUNC_EXECUTE_SCSI; 371 372 /* 373 * Copy the CDB into the SRB. It's only 6-16 bytes, 374 * so a copy is not too expensive. 375 */ 376 srb->cdb_len = csio->cdb_len; 377 if (ccb->ccb_h.flags & CAM_CDB_POINTER) 378 bcopy(csio->cdb_io.cdb_ptr, (u_int8_t *)&srb->cdb[0], 379 srb->cdb_len); 380 else 381 bcopy(csio->cdb_io.cdb_bytes, (u_int8_t *)&srb->cdb[0], 382 srb->cdb_len); 383 384 /* Map the s/g list. XXX 32bit addresses only! */ 385 if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) { 386 if ((ccb->ccb_h.flags & CAM_SCATTER_VALID) == 0) { 387 srb->data_len = csio->dxfer_len; 388 if (ccb->ccb_h.flags & CAM_DATA_PHYS) { 389 /* 390 * XXX This isn't 64-bit clean. 391 * However, this condition is not 392 * normally used in CAM. 393 */ 394 srb->sg_map32.SgCount = 1; 395 srb->sg_map32.SgEntry[0].SgAddress = 396 (uint32_t)(uintptr_t)csio->data_ptr; 397 srb->sg_map32.SgEntry[0].SgByteCount = 398 csio->dxfer_len; 399 } else { 400 /* 401 * Arrange things so that the S/G 402 * map will get set up automagically 403 */ 404 cm->cm_data = (void *)csio->data_ptr; 405 cm->cm_datalen = csio->dxfer_len; 406 cm->cm_sgtable = &srb->sg_map32; 407 } 408 } else { 409 /* XXX Need to handle multiple s/g elements */ 410 panic("aac_cam: multiple s/g elements"); 411 } 412 } else { 413 srb->sg_map32.SgCount = 0; 414 srb->sg_map32.SgEntry[0].SgByteCount = 0; 415 srb->data_len = 0; 416 } 417 418 break; 419 } 420 case XPT_RESET_DEV: 421 if (!(sc->flags & AAC_FLAGS_CAM_NORESET)) { 422 srb->function = AAC_SRB_FUNC_RESET_DEVICE; 423 break; 424 } else { 425 ccb->ccb_h.status = CAM_REQ_CMP; 426 xpt_done(ccb); 427 AAC_LOCK_RELEASE(&sc->aac_io_lock); 428 return; 429 } 430 default: 431 break; 432 } 433 434 srb->bus = camsc->inf->BusNumber; /* Bus number relative to the card */ 435 srb->target = ccb->ccb_h.target_id; 436 srb->lun = ccb->ccb_h.target_lun; 437 srb->timeout = ccb->ccb_h.timeout; /* XXX */ 438 srb->retry_limit = 0; 439 440 cm->cm_complete = aac_cam_complete; 441 cm->cm_private = ccb; 442 cm->cm_timestamp = time_second; 443 cm->cm_queue = AAC_ADAP_NORM_CMD_QUEUE; 444 445 fib->Header.XferState = 446 AAC_FIBSTATE_HOSTOWNED | 447 AAC_FIBSTATE_INITIALISED | 448 AAC_FIBSTATE_FROMHOST | 449 AAC_FIBSTATE_REXPECTED | 450 AAC_FIBSTATE_NORM; 451 fib->Header.Command = ScsiPortCommand; 452 fib->Header.Size = sizeof(struct aac_fib_header) + 453 sizeof(struct aac_srb32); 454 455 aac_enqueue_ready(cm); 456 aac_startio(cm->cm_sc); 457 458 AAC_LOCK_RELEASE(&sc->aac_io_lock); 459 460 return; 461 } 462 463 static void 464 aac_cam_poll(struct cam_sim *sim) 465 { 466 /* 467 * Pinging the interrupt routine isn't very safe, nor is it 468 * really necessary. Do nothing. 469 */ 470 } 471 472 static void 473 aac_cam_complete(struct aac_command *cm) 474 { 475 union ccb *ccb; 476 struct aac_srb_response *srbr; 477 struct aac_softc *sc; 478 479 debug_called(2); 480 481 sc = cm->cm_sc; 482 ccb = cm->cm_private; 483 srbr = (struct aac_srb_response *)&cm->cm_fib->data[0]; 484 485 if (srbr->fib_status != 0) { 486 device_printf(sc->aac_dev, "Passthru FIB failed!\n"); 487 ccb->ccb_h.status = CAM_REQ_ABORTED; 488 } else { 489 /* 490 * The SRB error codes just happen to match the CAM error 491 * codes. How convienient! 492 */ 493 ccb->ccb_h.status = srbr->srb_status; 494 495 /* Take care of SCSI_IO ops. */ 496 if (ccb->ccb_h.func_code == XPT_SCSI_IO) { 497 u_int8_t command, device; 498 499 ccb->csio.scsi_status = srbr->scsi_status; 500 501 /* Take care of autosense */ 502 if (srbr->sense_len) { 503 int sense_len, scsi_sense_len; 504 505 scsi_sense_len = sizeof(struct scsi_sense_data); 506 bzero(&ccb->csio.sense_data, scsi_sense_len); 507 sense_len = (srbr->sense_len > 508 scsi_sense_len) ? scsi_sense_len : 509 srbr->sense_len; 510 bcopy(&srbr->sense[0], &ccb->csio.sense_data, 511 srbr->sense_len); 512 ccb->csio.sense_len = sense_len; 513 ccb->ccb_h.status |= CAM_AUTOSNS_VALID; 514 /* scsi_sense_print(&ccb->csio); */ 515 } 516 517 /* If this is an inquiry command, fake things out */ 518 if (ccb->ccb_h.flags & CAM_CDB_POINTER) 519 command = ccb->csio.cdb_io.cdb_ptr[0]; 520 else 521 command = ccb->csio.cdb_io.cdb_bytes[0]; 522 523 if ((command == INQUIRY) && 524 (ccb->ccb_h.status == CAM_REQ_CMP)) { 525 device = ccb->csio.data_ptr[0] & 0x1f; 526 /* 527 * We want DASD and PROC devices to only be 528 * visible through the pass device. 529 */ 530 if ((device == T_DIRECT) || 531 (device == T_PROCESSOR) || 532 (sc->flags & AAC_FLAGS_CAM_PASSONLY)) 533 ccb->csio.data_ptr[0] = 534 ((ccb->csio.data_ptr[0] & 0xe0) | 535 T_NODEVICE); 536 } 537 } 538 } 539 540 aac_release_command(cm); 541 xpt_done(ccb); 542 543 return; 544 } 545 546 static u_int32_t 547 aac_cam_reset_bus(struct cam_sim *sim, union ccb *ccb) 548 { 549 struct aac_fib *fib; 550 struct aac_softc *sc; 551 struct aac_cam *camsc; 552 struct aac_vmioctl *vmi; 553 struct aac_resetbus *rbc; 554 int e; 555 556 camsc = (struct aac_cam *)cam_sim_softc(sim); 557 sc = camsc->inf->aac_sc; 558 559 if (sc == NULL) { 560 kprintf("Null sc?\n"); 561 return (CAM_REQ_ABORTED); 562 } 563 564 AAC_LOCK_ACQUIRE(&sc->aac_io_lock); 565 aac_alloc_sync_fib(sc, &fib); 566 567 vmi = (struct aac_vmioctl *)&fib->data[0]; 568 bzero(vmi, sizeof(struct aac_vmioctl)); 569 570 vmi->Command = VM_Ioctl; 571 vmi->ObjType = FT_DRIVE; 572 vmi->MethId = sc->scsi_method_id; 573 vmi->ObjId = 0; 574 vmi->IoctlCmd = ResetBus; 575 576 rbc = (struct aac_resetbus *)&vmi->IoctlBuf[0]; 577 rbc->BusNumber = camsc->inf->BusNumber; 578 579 e = aac_sync_fib(sc, ContainerCommand, 0, fib, 580 sizeof(struct aac_vmioctl)); 581 if (e) { 582 device_printf(sc->aac_dev,"Error %d sending ResetBus command\n", 583 e); 584 aac_release_sync_fib(sc); 585 AAC_LOCK_RELEASE(&sc->aac_io_lock); 586 return (CAM_REQ_ABORTED); 587 } 588 589 aac_release_sync_fib(sc); 590 AAC_LOCK_RELEASE(&sc->aac_io_lock); 591 return (CAM_REQ_CMP); 592 } 593 594 static u_int32_t 595 aac_cam_abort_ccb(struct cam_sim *sim, union ccb *ccb) 596 { 597 return (CAM_UA_ABORT); 598 } 599 600 static u_int32_t 601 aac_cam_term_io(struct cam_sim *sim, union ccb *ccb) 602 { 603 return (CAM_UA_TERMIO); 604 } 605