tw_osl_cam.c revision 144966
1/* 2 * Copyright (c) 2004-05 Applied Micro Circuits Corporation. 3 * Copyright (c) 2004-05 Vinod Kashyap. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 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 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD: head/sys/dev/twa/tw_osl_cam.c 144966 2005-04-12 22:07:11Z vkashyap $ 28 */ 29 30/* 31 * AMCC'S 3ware driver for 9000 series storage controllers. 32 * 33 * Author: Vinod Kashyap 34 */ 35 36 37/* 38 * FreeBSD CAM related functions. 39 */ 40 41 42#include "tw_osl_includes.h" 43 44#include <cam/cam.h> 45#include <cam/cam_ccb.h> 46#include <cam/cam_sim.h> 47#include <cam/cam_xpt_sim.h> 48#include <cam/cam_xpt_periph.h> 49#include <cam/cam_debug.h> 50#include <cam/cam_periph.h> 51 52#include <cam/scsi/scsi_all.h> 53#include <cam/scsi/scsi_message.h> 54 55static TW_VOID twa_action(struct cam_sim *sim, union ccb *ccb); 56static TW_VOID twa_poll(struct cam_sim *sim); 57static TW_VOID twa_async(TW_VOID *callback_arg, TW_UINT32 code, 58 struct cam_path *path, TW_VOID *arg); 59static TW_VOID twa_timeout(TW_VOID *arg); 60static TW_VOID twa_bus_scan_cb(struct cam_periph *periph, union ccb *ccb); 61 62static TW_INT32 tw_osli_execute_scsi(struct tw_osli_req_context *req, 63 union ccb *ccb); 64 65 66 67/* 68 * Function name: tw_osli_cam_attach 69 * Description: Attaches the driver to CAM. 70 * 71 * Input: sc -- ptr to OSL internal ctlr context 72 * Output: None 73 * Return value: 0 -- success 74 * non-zero-- failure 75 */ 76TW_INT32 77tw_osli_cam_attach(struct twa_softc *sc) 78{ 79 struct cam_devq *devq; 80 struct ccb_setasync csa; 81 TW_INT32 error; 82 83 tw_osli_dbg_dprintf(3, sc, "entered"); 84 85 /* 86 * Create the device queue for our SIM. 87 */ 88 if ((devq = cam_simq_alloc(TW_OSLI_MAX_NUM_IOS)) == NULL) { 89 tw_osli_printf(sc, "error = %d", 90 TW_CL_SEVERITY_ERROR_STRING, 91 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER, 92 0x2100, 93 "Failed to create SIM device queue", 94 ENOMEM); 95 return(ENOMEM); 96 } 97 98 /* 99 * Create a SIM entry. Though we can support TW_OSLI_MAX_NUM_IOS 100 * simultaneous requests, we claim to be able to handle only 101 * (TW_OSLI_MAX_NUM_IOS - 1), so that we always have a request 102 * packet available to service ioctls. 103 */ 104 tw_osli_dbg_dprintf(3, sc, "Calling cam_sim_alloc"); 105 sc->sim = cam_sim_alloc(twa_action, twa_poll, "twa", sc, 106 device_get_unit(sc->bus_dev), 107 TW_OSLI_MAX_NUM_IOS - 1, 1, devq); 108 if (sc->sim == NULL) { 109 cam_simq_free(devq); 110 tw_osli_printf(sc, "error = %d", 111 TW_CL_SEVERITY_ERROR_STRING, 112 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER, 113 0x2101, 114 "Failed to create a SIM entry", 115 ENOMEM); 116 return(ENOMEM); 117 } 118 119 /* 120 * Register the bus. 121 */ 122 tw_osli_dbg_dprintf(3, sc, "Calling xpt_bus_register"); 123 if (xpt_bus_register(sc->sim, 0) != CAM_SUCCESS) { 124 cam_sim_free(sc->sim, TRUE); 125 sc->sim = NULL; /* so cam_detach will not try to free it */ 126 tw_osli_printf(sc, "error = %d", 127 TW_CL_SEVERITY_ERROR_STRING, 128 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER, 129 0x2102, 130 "Failed to register the bus", 131 ENXIO); 132 return(ENXIO); 133 } 134 135 tw_osli_dbg_dprintf(3, sc, "Calling xpt_create_path"); 136 if (xpt_create_path(&sc->path, NULL, 137 cam_sim_path(sc->sim), 138 CAM_TARGET_WILDCARD, 139 CAM_LUN_WILDCARD) != CAM_REQ_CMP) { 140 xpt_bus_deregister(cam_sim_path (sc->sim)); 141 /* Passing TRUE to cam_sim_free will free the devq as well. */ 142 cam_sim_free(sc->sim, TRUE); 143 tw_osli_printf(sc, "error = %d", 144 TW_CL_SEVERITY_ERROR_STRING, 145 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER, 146 0x2103, 147 "Failed to create path", 148 ENXIO); 149 return(ENXIO); 150 } 151 152 tw_osli_dbg_dprintf(3, sc, "Calling xpt_setup_ccb"); 153 xpt_setup_ccb(&csa.ccb_h, sc->path, 5); 154 csa.ccb_h.func_code = XPT_SASYNC_CB; 155 csa.event_enable = AC_FOUND_DEVICE | AC_LOST_DEVICE; 156 csa.callback = twa_async; 157 csa.callback_arg = sc; 158 xpt_action((union ccb *)&csa); 159 160 tw_osli_dbg_dprintf(3, sc, "Calling tw_osli_request_bus_scan"); 161 /* 162 * Request a bus scan, so that CAM gets to know of 163 * the logical units that we control. 164 */ 165 if ((error = tw_osli_request_bus_scan(sc))) 166 tw_osli_printf(sc, "error = %d", 167 TW_CL_SEVERITY_ERROR_STRING, 168 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER, 169 0x2104, 170 "Bus scan request to CAM failed", 171 error); 172 173 tw_osli_dbg_dprintf(3, sc, "exiting"); 174 return(0); 175} 176 177 178 179/* 180 * Function name: tw_osli_cam_detach 181 * Description: Detaches the driver from CAM. 182 * 183 * Input: sc -- ptr to OSL internal ctlr context 184 * Output: None 185 * Return value: None 186 */ 187TW_VOID 188tw_osli_cam_detach(struct twa_softc *sc) 189{ 190 tw_osli_dbg_dprintf(3, sc, "entered"); 191 192 if (sc->path) 193 xpt_free_path(sc->path); 194 if (sc->sim) { 195 xpt_bus_deregister(cam_sim_path(sc->sim)); 196 /* Passing TRUE to cam_sim_free will free the devq as well. */ 197 cam_sim_free(sc->sim, TRUE); 198 } 199} 200 201 202 203/* 204 * Function name: tw_osli_execute_scsi 205 * Description: Build a fw cmd, based on a CAM style ccb, and 206 * send it down. 207 * 208 * Input: req -- ptr to OSL internal request context 209 * ccb -- ptr to CAM style ccb 210 * Output: None 211 * Return value: 0 -- success 212 * non-zero-- failure 213 */ 214TW_INT32 215tw_osli_execute_scsi(struct tw_osli_req_context *req, union ccb *ccb) 216{ 217 struct twa_softc *sc = req->ctlr; 218 struct tw_cl_req_packet *req_pkt; 219 struct tw_cl_scsi_req_packet *scsi_req; 220 struct ccb_hdr *ccb_h = &(ccb->ccb_h); 221 struct ccb_scsiio *csio = &(ccb->csio); 222 TW_INT32 error; 223 224 tw_osli_dbg_dprintf(10, sc, "SCSI I/O request 0x%x", 225 csio->cdb_io.cdb_bytes[0]); 226 227 if (ccb_h->target_id >= TW_CL_MAX_NUM_UNITS) { 228 tw_osli_dbg_dprintf(3, sc, "Invalid target. PTL = %x %x %x", 229 ccb_h->path_id, ccb_h->target_id, ccb_h->target_lun); 230 ccb_h->status |= CAM_TID_INVALID; 231 xpt_done(ccb); 232 return(1); 233 } 234 if (ccb_h->target_lun >= TW_CL_MAX_NUM_LUNS) { 235 tw_osli_dbg_dprintf(3, sc, "Invalid lun. PTL = %x %x %x", 236 ccb_h->path_id, ccb_h->target_id, ccb_h->target_lun); 237 ccb_h->status |= CAM_LUN_INVALID; 238 xpt_done(ccb); 239 return(1); 240 } 241 242 if(ccb_h->flags & CAM_CDB_PHYS) { 243 tw_osli_printf(sc, "", 244 TW_CL_SEVERITY_ERROR_STRING, 245 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER, 246 0x2105, 247 "Physical CDB address!"); 248 ccb_h->status = CAM_REQ_CMP_ERR; 249 xpt_done(ccb); 250 return(1); 251 } 252 253 /* 254 * We are going to work on this request. Mark it as enqueued (though 255 * we don't actually queue it...) 256 */ 257 ccb_h->status |= CAM_SIM_QUEUED; 258 259 if((ccb_h->flags & CAM_DIR_MASK) != CAM_DIR_NONE) { 260 if(ccb_h->flags & CAM_DIR_IN) 261 req->flags |= TW_OSLI_REQ_FLAGS_DATA_IN; 262 else 263 req->flags |= TW_OSLI_REQ_FLAGS_DATA_OUT; 264 } 265 266 /* Build the CL understood request packet for SCSI cmds. */ 267 req_pkt = &req->req_pkt; 268 req_pkt->status = 0; 269 req_pkt->tw_osl_callback = tw_osl_complete_io; 270 scsi_req = &(req_pkt->gen_req_pkt.scsi_req); 271 scsi_req->unit = ccb_h->target_id; 272 scsi_req->lun = ccb_h->target_lun; 273 scsi_req->sense_len = 0; 274 scsi_req->sense_data = (TW_UINT8 *)(&csio->sense_data); 275 scsi_req->scsi_status = 0; 276 if(ccb_h->flags & CAM_CDB_POINTER) 277 scsi_req->cdb = csio->cdb_io.cdb_ptr; 278 else 279 scsi_req->cdb = csio->cdb_io.cdb_bytes; 280 scsi_req->cdb_len = csio->cdb_len; 281 282 if (!(ccb_h->flags & CAM_DATA_PHYS)) { 283 /* Virtual data addresses. Need to convert them... */ 284 tw_osli_dbg_dprintf(3, sc, 285 "XPT_SCSI_IO: Single virtual address!"); 286 if (!(ccb_h->flags & CAM_SCATTER_VALID)) { 287 if (csio->dxfer_len > TW_CL_MAX_IO_SIZE) { 288 tw_osli_printf(sc, "size = %d", 289 TW_CL_SEVERITY_ERROR_STRING, 290 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER, 291 0x2106, 292 "I/O size too big", 293 csio->dxfer_len); 294 ccb_h->status = CAM_REQ_TOO_BIG; 295 xpt_done(ccb); 296 return(1); 297 } 298 299 if ((req->length = csio->dxfer_len)) { 300 req->data = csio->data_ptr; 301 scsi_req->sgl_entries = 1; 302 } 303 } else { 304 tw_osli_printf(sc, "", 305 TW_CL_SEVERITY_ERROR_STRING, 306 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER, 307 0x2107, 308 "XPT_SCSI_IO: Got SGList"); 309 ccb_h->status = CAM_REQ_CMP_ERR; 310 xpt_done(ccb); 311 return(1); 312 } 313 } else { 314 /* Data addresses are physical. */ 315 tw_osli_printf(sc, "", 316 TW_CL_SEVERITY_ERROR_STRING, 317 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER, 318 0x2108, 319 "XPT_SCSI_IO: Physical data addresses"); 320 ccb_h->status = CAM_REQ_CMP_ERR; 321 ccb_h->status |= CAM_RELEASE_SIMQ; 322 ccb_h->status &= ~CAM_SIM_QUEUED; 323 xpt_done(ccb); 324 return(1); 325 } 326 327 ccb_h->timeout_ch = timeout(twa_timeout, req, 328 (ccb_h->timeout * hz) / 1000); 329 /* 330 * twa_map_load_data_callback will fill in the SGL, 331 * and submit the I/O. 332 */ 333 error = tw_osli_map_request(req); 334 return(error); 335} 336 337 338 339/* 340 * Function name: twa_action 341 * Description: Driver entry point for CAM's use. 342 * 343 * Input: sim -- sim corresponding to the ctlr 344 * ccb -- ptr to CAM request 345 * Output: None 346 * Return value: None 347 */ 348TW_VOID 349twa_action(struct cam_sim *sim, union ccb *ccb) 350{ 351 struct twa_softc *sc = (struct twa_softc *)cam_sim_softc(sim); 352 struct ccb_hdr *ccb_h = &(ccb->ccb_h); 353 354 switch (ccb_h->func_code) { 355 case XPT_SCSI_IO: /* SCSI I/O */ 356 { 357 struct tw_osli_req_context *req; 358 359 if ((sc->state & TW_OSLI_CTLR_STATE_SIMQ_FROZEN) || 360 ((req = tw_osli_get_request(sc)) == NULL)) { 361 tw_osli_dbg_dprintf(2, sc, 362 "simq frozen/Cannot get request pkt."); 363 /* 364 * Freeze the simq to maintain ccb ordering. The next 365 * ccb that gets completed will unfreeze the simq. 366 */ 367 tw_osli_disallow_new_requests(sc); 368 ccb_h->status |= CAM_REQUEUE_REQ; 369 xpt_done(ccb); 370 break; 371 } 372 req->req_handle.osl_req_ctxt = req; 373 req->orig_req = ccb; 374 if (tw_osli_execute_scsi(req, ccb)) 375 tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q); 376 break; 377 } 378 379 case XPT_ABORT: 380 tw_osli_dbg_dprintf(2, sc, "Abort request."); 381 ccb_h->status = CAM_UA_ABORT; 382 xpt_done(ccb); 383 break; 384 385 case XPT_RESET_BUS: 386 tw_cl_create_event(&(sc->ctlr_handle), TW_CL_TRUE, 387 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER, 388 0x2108, 0x3, TW_CL_SEVERITY_INFO_STRING, 389 "Received Reset Bus request from CAM", 390 " "); 391 392 if (tw_cl_reset_ctlr(&sc->ctlr_handle)) { 393 tw_cl_create_event(&(sc->ctlr_handle), TW_CL_TRUE, 394 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER, 395 0x2109, 0x1, TW_CL_SEVERITY_ERROR_STRING, 396 "Failed to reset bus", 397 " "); 398 ccb_h->status = CAM_REQ_CMP_ERR; 399 } 400 else 401 ccb_h->status = CAM_REQ_CMP; 402 403 xpt_done(ccb); 404 break; 405 406 case XPT_SET_TRAN_SETTINGS: 407 tw_osli_dbg_dprintf(3, sc, "XPT_SET_TRAN_SETTINGS"); 408 409 /* 410 * This command is not supported, since it's very specific 411 * to SCSI, and we are doing ATA. 412 */ 413 ccb_h->status = CAM_FUNC_NOTAVAIL; 414 xpt_done(ccb); 415 break; 416 417 case XPT_GET_TRAN_SETTINGS: 418 { 419 struct ccb_trans_settings *cts = &ccb->cts; 420 421 tw_osli_dbg_dprintf(3, sc, "XPT_GET_TRAN_SETTINGS"); 422 cts->valid = (CCB_TRANS_DISC_VALID | CCB_TRANS_TQ_VALID); 423 cts->flags &= ~(CCB_TRANS_DISC_ENB | CCB_TRANS_TAG_ENB); 424 ccb_h->status = CAM_REQ_CMP; 425 xpt_done(ccb); 426 break; 427 } 428 429 case XPT_CALC_GEOMETRY: 430 tw_osli_dbg_dprintf(3, sc, "XPT_CALC_GEOMETRY"); 431 cam_calc_geometry(&ccb->ccg, 1/* extended */); 432 xpt_done(ccb); 433 break; 434 435 case XPT_PATH_INQ: /* Path inquiry -- get twa properties */ 436 { 437 struct ccb_pathinq *path_inq = &ccb->cpi; 438 439 tw_osli_dbg_dprintf(3, sc, "XPT_PATH_INQ request"); 440 441 path_inq->version_num = 1; 442 path_inq->hba_inquiry = 0; 443 path_inq->target_sprt = 0; 444 path_inq->hba_misc = 0; 445 path_inq->hba_eng_cnt = 0; 446 path_inq->max_target = TW_CL_MAX_NUM_UNITS; 447 path_inq->max_lun = TW_CL_MAX_NUM_LUNS - 1; 448 path_inq->unit_number = cam_sim_unit(sim); 449 path_inq->bus_id = cam_sim_bus(sim); 450 path_inq->initiator_id = 12; 451 path_inq->base_transfer_speed = 100000; 452 strncpy(path_inq->sim_vid, "FreeBSD", SIM_IDLEN); 453 strncpy(path_inq->hba_vid, "3ware", HBA_IDLEN); 454 strncpy(path_inq->dev_name, cam_sim_name(sim), DEV_IDLEN); 455 ccb_h->status = CAM_REQ_CMP; 456 xpt_done(ccb); 457 break; 458 } 459 460 default: 461 tw_osli_dbg_dprintf(3, sc, "func_code = %x", ccb_h->func_code); 462 ccb_h->status = CAM_REQ_INVALID; 463 xpt_done(ccb); 464 break; 465 } 466} 467 468 469 470/* 471 * Function name: twa_poll 472 * Description: Driver entry point called when interrupts are not 473 * available. 474 * 475 * Input: sim -- sim corresponding to the controller 476 * Output: None 477 * Return value: None 478 */ 479TW_VOID 480twa_poll(struct cam_sim *sim) 481{ 482 struct twa_softc *sc = (struct twa_softc *)(cam_sim_softc(sim)); 483 484 tw_osli_dbg_dprintf(3, sc, "entering; sc = %p", sc); 485 if (tw_cl_interrupt(&(sc->ctlr_handle))) 486 tw_cl_deferred_interrupt(&(sc->ctlr_handle)); 487 tw_osli_dbg_dprintf(3, sc, "exiting; sc = %p", sc); 488} 489 490 491 492/* 493 * Function name: twa_async 494 * Description: Driver entry point for CAM to notify driver of special 495 * events. We don't use this for now. 496 * 497 * Input: callback_arg -- ptr to per ctlr structure 498 * code -- code associated with the event 499 * path -- cam path 500 * arg -- 501 * Output: None 502 * Return value: 0 -- success 503 * non-zero-- failure 504 */ 505TW_VOID 506twa_async(TW_VOID *callback_arg, TW_UINT32 code, 507 struct cam_path *path, TW_VOID *arg) 508{ 509#ifdef TW_OSL_DEBUG 510 struct twa_softc *sc = (struct twa_softc *)callback_arg; 511#endif /* TW_OSL_DEBUG */ 512 513 tw_osli_dbg_dprintf(3, sc, "sc = %p, code = %x, path = %p, arg = %p", 514 sc, code, path, arg); 515} 516 517 518 519/* 520 * Function name: twa_timeout 521 * Description: Driver entry point for being alerted on a request 522 * timing out. 523 * 524 * Input: arg -- ptr to timed out request 525 * Output: None 526 * Return value: None 527 */ 528static TW_VOID 529twa_timeout(TW_VOID *arg) 530{ 531 struct tw_osli_req_context *req = 532 (struct tw_osli_req_context *)arg; 533 534 tw_cl_create_event(&(req->ctlr->ctlr_handle), TW_CL_TRUE, 535 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER, 536 0x210B, 0x1, TW_CL_SEVERITY_ERROR_STRING, 537 "Request timed out!", 538 "request = %p", req); 539 tw_cl_reset_ctlr(&(req->ctlr->ctlr_handle)); 540} 541 542 543 544/* 545 * Function name: tw_osli_request_bus_scan 546 * Description: Requests CAM for a scan of the bus. 547 * 548 * Input: sc -- ptr to per ctlr structure 549 * Output: None 550 * Return value: 0 -- success 551 * non-zero-- failure 552 */ 553TW_INT32 554tw_osli_request_bus_scan(struct twa_softc *sc) 555{ 556 struct cam_path *path; 557 union ccb *ccb; 558 559 tw_osli_dbg_dprintf(3, sc, "entering"); 560 561 if ((ccb = malloc(sizeof(union ccb), M_TEMP, M_WAITOK)) == NULL) 562 return(ENOMEM); 563 bzero(ccb, sizeof(union ccb)); 564 if (xpt_create_path(&path, xpt_periph, cam_sim_path(sc->sim), 565 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) 566 return(EIO); 567 568 xpt_setup_ccb(&ccb->ccb_h, path, 5); 569 ccb->ccb_h.func_code = XPT_SCAN_BUS; 570 ccb->ccb_h.cbfcnp = twa_bus_scan_cb; 571 ccb->crcn.flags = CAM_FLAG_NONE; 572 xpt_action(ccb); 573 return(0); 574} 575 576 577 578/* 579 * Function name: twa_bus_scan_cb 580 * Description: Callback from CAM on a bus scan request. 581 * 582 * Input: periph -- we don't use this 583 * ccb -- bus scan request ccb that we sent to CAM 584 * Output: None 585 * Return value: None 586 */ 587static TW_VOID 588twa_bus_scan_cb(struct cam_periph *periph, union ccb *ccb) 589{ 590 tw_osli_dbg_printf(3, "entering"); 591 592 if (ccb->ccb_h.status != CAM_REQ_CMP) 593 printf("cam_scan_callback: failure status = %x\n", 594 ccb->ccb_h.status); 595 else 596 tw_osli_dbg_printf(3, "success"); 597 598 xpt_free_path(ccb->ccb_h.path); 599 free(ccb, M_TEMP); 600} 601 602 603 604/* 605 * Function name: tw_osli_allow_new_requests 606 * Description: Sets the appropriate status bits in a ccb such that, 607 * when the ccb is completed by a call to xpt_done, 608 * CAM knows that it's ok to unfreeze the flow of new 609 * requests to this controller, if the flow is frozen. 610 * 611 * Input: sc -- ptr to OSL internal ctlr context 612 * ccb -- ptr to CAM request 613 * Output: None 614 * Return value: None 615 */ 616TW_VOID 617tw_osli_allow_new_requests(struct twa_softc *sc, TW_VOID *ccb) 618{ 619 ((union ccb *)(ccb))->ccb_h.status |= CAM_RELEASE_SIMQ; 620 sc->state &= ~TW_OSLI_CTLR_STATE_SIMQ_FROZEN; 621} 622 623 624 625/* 626 * Function name: tw_osli_disallow_new_requests 627 * Description: Calls the appropriate CAM function, so as to freeze 628 * the flow of new requests from CAM to this controller. 629 * 630 * Input: sc -- ptr to OSL internal ctlr context 631 * Output: None 632 * Return value: None 633 */ 634TW_VOID 635tw_osli_disallow_new_requests(struct twa_softc *sc) 636{ 637 xpt_freeze_simq(sc->sim, 1); 638 sc->state |= TW_OSLI_CTLR_STATE_SIMQ_FROZEN; 639} 640 641 642 643/* 644 * Function name: tw_osl_scan_bus 645 * Description: CL calls this function to request for a bus scan. 646 * 647 * Input: ctlr_handle -- ptr to controller handle 648 * Output: None 649 * Return value: None 650 */ 651TW_VOID 652tw_osl_scan_bus(struct tw_cl_ctlr_handle *ctlr_handle) 653{ 654 struct twa_softc *sc = ctlr_handle->osl_ctlr_ctxt; 655 TW_INT32 error; 656 657 if ((error = tw_osli_request_bus_scan(sc))) 658 tw_osli_printf(sc, "error = %d", 659 TW_CL_SEVERITY_ERROR_STRING, 660 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER, 661 0x2109, 662 "Bus scan request to CAM failed", 663 error); 664} 665 666 667 668/* 669 * Function name: tw_osl_complete_io 670 * Description: Called to complete CAM scsi requests. 671 * 672 * Input: req_handle -- ptr to request handle 673 * Output: None 674 * Return value: None 675 */ 676TW_VOID 677tw_osl_complete_io(struct tw_cl_req_handle *req_handle) 678{ 679 struct tw_osli_req_context *req = req_handle->osl_req_ctxt; 680 struct tw_cl_req_packet *req_pkt = 681 (struct tw_cl_req_packet *)(&req->req_pkt); 682 struct tw_cl_scsi_req_packet *scsi_req; 683 struct twa_softc *sc = req->ctlr; 684 union ccb *ccb = (union ccb *)(req->orig_req); 685 686 tw_osli_dbg_dprintf(10, sc, "entering"); 687 688 if (req->state != TW_OSLI_REQ_STATE_BUSY) 689 tw_osli_printf(sc, "request = %p, status = %d", 690 TW_CL_SEVERITY_ERROR_STRING, 691 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER, 692 0x210A, 693 "Unposted command completed!!", 694 req, req->state); 695 696 /* 697 * Remove request from the busy queue. Just mark it complete. 698 * There's no need to move it into the complete queue as we are 699 * going to be done with it right now. 700 */ 701 req->state = TW_OSLI_REQ_STATE_COMPLETE; 702 tw_osli_req_q_remove_item(req, TW_OSLI_BUSY_Q); 703 704 tw_osli_unmap_request(req); 705 706 untimeout(twa_timeout, req, ccb->ccb_h.timeout_ch); 707 if (req->error_code) { 708 /* This request never got submitted to the firmware. */ 709 if (req->error_code == EBUSY) { 710 /* 711 * Cmd queue is full, or common layer is out 712 * of resources. Freeze the simq to maintain 713 * ccb ordering. The next ccb that gets 714 * completed will unfreeze the simq. 715 */ 716 tw_osli_disallow_new_requests(req->ctlr); 717 ccb->ccb_h.status |= CAM_REQUEUE_REQ; 718 } 719 else if (req->error_code == EFBIG) 720 ccb->ccb_h.status = CAM_REQ_TOO_BIG; 721 else 722 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 723 } else { 724 scsi_req = &(req_pkt->gen_req_pkt.scsi_req); 725 if (req_pkt->status == TW_CL_ERR_REQ_SUCCESS) 726 ccb->ccb_h.status = CAM_REQ_CMP; 727 else { 728 if (req_pkt->status & TW_CL_ERR_REQ_INVALID_TARGET) 729 ccb->ccb_h.status |= CAM_TID_INVALID; 730 else if (req_pkt->status & TW_CL_ERR_REQ_INVALID_LUN) 731 ccb->ccb_h.status |= CAM_LUN_INVALID; 732 else if (req_pkt->status & TW_CL_ERR_REQ_SCSI_ERROR) 733 ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR; 734 else if (req_pkt->status & TW_CL_ERR_REQ_BUS_RESET) 735 ccb->ccb_h.status |= CAM_SCSI_BUS_RESET; 736 /* 737 * If none of the above errors occurred, simply 738 * mark completion error. 739 */ 740 if (ccb->ccb_h.status == 0) 741 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 742 743 if (req_pkt->status & TW_CL_ERR_REQ_AUTO_SENSE_VALID) { 744 ccb->csio.sense_len = scsi_req->sense_len; 745 ccb->ccb_h.status |= CAM_AUTOSNS_VALID; 746 } 747 } 748 749 ccb->csio.scsi_status = scsi_req->scsi_status; 750 /* If simq is frozen, unfreeze it. */ 751 if (sc->state & TW_OSLI_CTLR_STATE_SIMQ_FROZEN) 752 tw_osli_allow_new_requests(sc, (TW_VOID *)ccb); 753 } 754 755 ccb->ccb_h.status &= ~CAM_SIM_QUEUED; 756 xpt_done(ccb); 757 if (! req->error_code) 758 /* twa_action will free the request otherwise */ 759 tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q); 760} 761 762