sys/cam/ctl/ctl_frontend_cam_sim.c

   1 /*-
   2  * Copyright (c) 2009 Silicon Graphics International Corp.
   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.
  11  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  12  *    substantially similar to the "NO WARRANTY" disclaimer below
  13  *    ("Disclaimer") and any redistribution must be conditioned upon
  14  *    including a substantially similar Disclaimer requirement for further
  15  *    binary redistribution.
  16  *
  17  * NO WARRANTY
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  26  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  27  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGES.
  29  *
  30  * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_frontend_cam_sim.c#4 $
  31  */
  32 /*
  33  * CTL frontend to CAM SIM interface.  This allows access to CTL LUNs via
  34  * the da(4) and pass(4) drivers from inside the system.
  35  *
  36  * Author: Ken Merry <ken@FreeBSD.org>
  37  */
  38
  39 #include <sys/cdefs.h>
  40 __FBSDID("$FreeBSD$");
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/kernel.h>
  45 #include <sys/types.h>
  46 #include <sys/malloc.h>
  47 #include <sys/lock.h>
  48 #include <sys/mutex.h>
  49 #include <sys/condvar.h>
  50 #include <sys/queue.h>
  51 #include <sys/bus.h>
  52 #include <sys/sysctl.h>
  53 #include <machine/bus.h>
  54 #include <sys/sbuf.h>
  55
  56 #include <cam/cam.h>
  57 #include <cam/cam_ccb.h>
  58 #include <cam/cam_sim.h>
  59 #include <cam/cam_xpt_sim.h>
  60 #include <cam/cam_xpt.h>
  61 #include <cam/cam_periph.h>
  62 #include <cam/scsi/scsi_all.h>
  63 #include <cam/scsi/scsi_message.h>
  64 #include <cam/ctl/ctl_io.h>
  65 #include <cam/ctl/ctl.h>
  66 #include <cam/ctl/ctl_frontend.h>
  67 #include <cam/ctl/ctl_frontend_internal.h>
  68 #include <cam/ctl/ctl_mem_pool.h>
  69 #include <cam/ctl/ctl_debug.h>
  70
  71 #define io_ptr          spriv_ptr1
  72
  73 struct cfcs_io {
  74         union ccb *ccb;
  75 };
  76
  77 struct cfcs_softc {
  78         struct ctl_frontend fe;
  79         char port_name[32];
  80         struct cam_sim *sim;
  81         struct cam_devq *devq;
  82         struct cam_path *path;
  83         struct mtx lock;
  84         char lock_desc[32];
  85         uint64_t wwnn;
  86         uint64_t wwpn;
  87         uint32_t cur_tag_num;
  88         int online;
  89 };
  90
  91 /*
  92  * We can't handle CCBs with these flags.  For the most part, we just don't
  93  * handle physical addresses yet.  That would require mapping things in
  94  * order to do the copy.
  95  */
  96 #define CFCS_BAD_CCB_FLAGS (CAM_DATA_ISPHYS | CAM_MSG_BUF_PHYS |        \
  97         CAM_SNS_BUF_PHYS | CAM_CDB_PHYS | CAM_SENSE_PTR |               \
  98         CAM_SENSE_PHYS)
  99
 100 int cfcs_init(void);
 101 void cfcs_shutdown(void);
 102 static void cfcs_poll(struct cam_sim *sim);
 103 static void cfcs_online(void *arg);
 104 static void cfcs_offline(void *arg);
 105 static int cfcs_targ_enable(void *arg, struct ctl_id targ_id);
 106 static int cfcs_targ_disable(void *arg, struct ctl_id targ_id);
 107 static int cfcs_lun_enable(void *arg, struct ctl_id target_id, int lun_id);
 108 static int cfcs_lun_disable(void *arg, struct ctl_id target_id, int lun_id);
 109 static void cfcs_datamove(union ctl_io *io);
 110 static void cfcs_done(union ctl_io *io);
 111 void cfcs_action(struct cam_sim *sim, union ccb *ccb);
 112 static void cfcs_async(void *callback_arg, uint32_t code,
 113                        struct cam_path *path, void *arg);
 114
 115 struct cfcs_softc cfcs_softc;
 116 /*
 117  * This is primarly intended to allow for error injection to test the CAM
 118  * sense data and sense residual handling code.  This sets the maximum
 119  * amount of SCSI sense data that we will report to CAM.
 120  */
 121 static int cfcs_max_sense = sizeof(struct scsi_sense_data);
 122
 123 SYSCTL_NODE(_kern_cam, OID_AUTO, ctl2cam, CTLFLAG_RD, 0,
 124             "CAM Target Layer SIM frontend");
 125 SYSCTL_INT(_kern_cam_ctl2cam, OID_AUTO, max_sense, CTLFLAG_RW,
 126            &cfcs_max_sense, 0, "Maximum sense data size");
 127
 128 static int cfcs_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 129
 130 static moduledata_t cfcs_moduledata = {
 131         "ctlcfcs",
 132         cfcs_module_event_handler,
 133         NULL
 134 };
 135
 136 DECLARE_MODULE(ctlcfcs, cfcs_moduledata, SI_SUB_CONFIGURE, SI_ORDER_FOURTH);
 137 MODULE_VERSION(ctlcfcs, 1);
 138 MODULE_DEPEND(ctlcfi, ctl, 1, 1, 1);
 139 MODULE_DEPEND(ctlcfi, cam, 1, 1, 1);
 140
 141 int
 142 cfcs_init(void)
 143 {
 144         struct cfcs_softc *softc;
 145         struct ccb_setasync csa;
 146         struct ctl_frontend *fe;
 147 #ifdef NEEDTOPORT
 148         char wwnn[8];
 149 #endif
 150         int retval;
 151
 152         softc = &cfcs_softc;
 153         retval = 0;
 154         bzero(softc, sizeof(*softc));
 155         sprintf(softc->lock_desc, "ctl2cam");
 156         mtx_init(&softc->lock, softc->lock_desc, NULL, MTX_DEF);
 157         fe = &softc->fe;
 158
 159         fe->port_type = CTL_PORT_INTERNAL;
 160         /* XXX KDM what should the real number be here? */
 161         fe->num_requested_ctl_io = 4096;
 162         snprintf(softc->port_name, sizeof(softc->port_name), "ctl2cam");
 163         fe->port_name = softc->port_name;
 164         fe->port_online = cfcs_online;
 165         fe->port_offline = cfcs_offline;
 166         fe->onoff_arg = softc;
 167         fe->targ_enable = cfcs_targ_enable;
 168         fe->targ_disable = cfcs_targ_disable;
 169         fe->lun_enable = cfcs_lun_enable;
 170         fe->lun_disable = cfcs_lun_disable;
 171         fe->targ_lun_arg = softc;
 172         fe->fe_datamove = cfcs_datamove;
 173         fe->fe_done = cfcs_done;
 174
 175         /* XXX KDM what should we report here? */
 176         /* XXX These should probably be fetched from CTL. */
 177         fe->max_targets = 1;
 178         fe->max_target_id = 15;
 179
 180         retval = ctl_frontend_register(fe, /*master_SC*/ 1);
 181         if (retval != 0) {
 182                 printf("%s: ctl_frontend_register() failed with error %d!\n",
 183                        __func__, retval);
 184                 mtx_destroy(&softc->lock);
 185                 return (retval);
 186         }
 187
 188         /*
 189          * Get the WWNN out of the database, and create a WWPN as well.
 190          */
 191 #ifdef NEEDTOPORT
 192         ddb_GetWWNN((char *)wwnn);
 193         softc->wwnn = be64dec(wwnn);
 194         softc->wwpn = softc->wwnn + (softc->fe.targ_port & 0xff);
 195 #endif
 196
 197         /*
 198          * If the CTL frontend didn't tell us what our WWNN/WWPN is, go
 199          * ahead and set something random.
 200          */
 201         if (fe->wwnn == 0) {
 202                 uint64_t random_bits;
 203
 204                 arc4rand(&random_bits, sizeof(random_bits), 0);
 205                 softc->wwnn = (random_bits & 0x0000000fffffff00ULL) |
 206                         /* Company ID */ 0x5000000000000000ULL |
 207                         /* NL-Port */    0x0300;
 208                 softc->wwpn = softc->wwnn + fe->targ_port + 1;
 209                 fe->wwnn = softc->wwnn;
 210                 fe->wwpn = softc->wwpn;
 211         } else {
 212                 softc->wwnn = fe->wwnn;
 213                 softc->wwpn = fe->wwpn;
 214         }
 215
 216         mtx_lock(&softc->lock);
 217         softc->devq = cam_simq_alloc(fe->num_requested_ctl_io);
 218         if (softc->devq == NULL) {
 219                 printf("%s: error allocating devq\n", __func__);
 220                 retval = ENOMEM;
 221                 goto bailout;
 222         }
 223
 224         softc->sim = cam_sim_alloc(cfcs_action, cfcs_poll, softc->port_name,
 225                                    softc, /*unit*/ 0, &softc->lock, 1,
 226                                    fe->num_requested_ctl_io, softc->devq);
 227         if (softc->sim == NULL) {
 228                 printf("%s: error allocating SIM\n", __func__);
 229                 retval = ENOMEM;
 230                 goto bailout;
 231         }
 232
 233         if (xpt_bus_register(softc->sim, NULL, 0) != CAM_SUCCESS) {
 234                 printf("%s: error registering SIM\n", __func__);
 235                 retval = ENOMEM;
 236                 goto bailout;
 237         }
 238
 239         if (xpt_create_path(&softc->path, /*periph*/NULL,
 240                             cam_sim_path(softc->sim),
 241                             CAM_TARGET_WILDCARD,
 242                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 243                 printf("%s: error creating path\n", __func__);
 244                 xpt_bus_deregister(cam_sim_path(softc->sim));
 245                 retval = EINVAL;
 246                 goto bailout;
 247         }
 248
 249         xpt_setup_ccb(&csa.ccb_h, softc->path, CAM_PRIORITY_NONE);
 250         csa.ccb_h.func_code = XPT_SASYNC_CB;
 251         csa.event_enable = AC_LOST_DEVICE;
 252         csa.callback = cfcs_async;
 253         csa.callback_arg = softc->sim;
 254         xpt_action((union ccb *)&csa);
 255
 256         mtx_unlock(&softc->lock);
 257
 258         return (retval);
 259
 260 bailout:
 261         if (softc->sim)
 262                 cam_sim_free(softc->sim, /*free_devq*/ TRUE);
 263         else if (softc->devq)
 264                 cam_simq_free(softc->devq);
 265         mtx_unlock(&softc->lock);
 266         mtx_destroy(&softc->lock);
 267
 268         return (retval);
 269 }
 270
 271 static void
 272 cfcs_poll(struct cam_sim *sim)
 273 {
 274
 275 }
 276
 277 void
 278 cfcs_shutdown(void)
 279 {
 280
 281 }
 282
 283 static int
 284 cfcs_module_event_handler(module_t mod, int what, void *arg)
 285 {
 286
 287         switch (what) {
 288         case MOD_LOAD:
 289                 return (cfcs_init());
 290         case MOD_UNLOAD:
 291                 return (EBUSY);
 292         default:
 293                 return (EOPNOTSUPP);
 294         }
 295 }
 296
 297 static void
 298 cfcs_onoffline(void *arg, int online)
 299 {
 300         struct cfcs_softc *softc;
 301         union ccb *ccb;
 302
 303         softc = (struct cfcs_softc *)arg;
 304
 305         mtx_lock(&softc->lock);
 306         softc->online = online;
 307
 308         ccb = xpt_alloc_ccb_nowait();
 309         if (ccb == NULL) {
 310                 printf("%s: unable to allocate CCB for rescan\n", __func__);
 311                 goto bailout;
 312         }
 313
 314         if (xpt_create_path(&ccb->ccb_h.path, NULL,
 315                             cam_sim_path(softc->sim), CAM_TARGET_WILDCARD,
 316                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 317                 printf("%s: can't allocate path for rescan\n", __func__);
 318                 xpt_free_ccb(ccb);
 319                 goto bailout;
 320         }
 321         xpt_rescan(ccb);
 322
 323 bailout:
 324         mtx_unlock(&softc->lock);
 325 }
 326
 327 static void
 328 cfcs_online(void *arg)
 329 {
 330         cfcs_onoffline(arg, /*online*/ 1);
 331 }
 332
 333 static void
 334 cfcs_offline(void *arg)
 335 {
 336         cfcs_onoffline(arg, /*online*/ 0);
 337 }
 338
 339 static int
 340 cfcs_targ_enable(void *arg, struct ctl_id targ_id)
 341 {
 342         return (0);
 343 }
 344
 345 static int
 346 cfcs_targ_disable(void *arg, struct ctl_id targ_id)
 347 {
 348         return (0);
 349 }
 350
 351 static int
 352 cfcs_lun_enable(void *arg, struct ctl_id target_id, int lun_id)
 353 {
 354         return (0);
 355 }
 356 static int
 357 cfcs_lun_disable(void *arg, struct ctl_id target_id, int lun_id)
 358 {
 359         return (0);
 360 }
 361
 362 /*
 363  * This function is very similar to ctl_ioctl_do_datamove().  Is there a
 364  * way to combine the functionality?
 365  *
 366  * XXX KDM may need to move this into a thread.  We're doing a bcopy in the
 367  * caller's context, which will usually be the backend.  That may not be a
 368  * good thing.
 369  */
 370 static void
 371 cfcs_datamove(union ctl_io *io)
 372 {
 373         union ccb *ccb;
 374         bus_dma_segment_t cam_sg_entry, *cam_sglist;
 375         struct ctl_sg_entry ctl_sg_entry, *ctl_sglist;
 376         int cam_sg_count, ctl_sg_count, cam_sg_start;
 377         int cam_sg_offset;
 378         int len_to_copy, len_copied;
 379         int ctl_watermark, cam_watermark;
 380         int i, j;
 381
 382
 383         cam_sg_offset = 0;
 384         cam_sg_start = 0;
 385
 386         ccb = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
 387
 388         /*
 389          * Note that we have a check in cfcs_action() to make sure that any
 390          * CCBs with "bad" flags are returned with CAM_REQ_INVALID.  This
 391          * is just to make sure no one removes that check without updating
 392          * this code to provide the additional functionality necessary to
 393          * support those modes of operation.
 394          */
 395         KASSERT(((ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS) == 0), ("invalid "
 396                   "CAM flags %#x", (ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS)));
 397
 398         /*
 399          * Simplify things on both sides by putting single buffers into a
 400          * single entry S/G list.
 401          */
 402         switch ((ccb->ccb_h.flags & CAM_DATA_MASK)) {
 403         case CAM_DATA_SG: {
 404                 int len_seen;
 405
 406                 cam_sglist = (bus_dma_segment_t *)ccb->csio.data_ptr;
 407                 cam_sg_count = ccb->csio.sglist_cnt;
 408
 409                 for (i = 0, len_seen = 0; i < cam_sg_count; i++) {
 410                         if ((len_seen + cam_sglist[i].ds_len) >=
 411                              io->scsiio.kern_rel_offset) {
 412                                 cam_sg_start = i;
 413                                 cam_sg_offset = io->scsiio.kern_rel_offset -
 414                                         len_seen;
 415                                 break;
 416                         }
 417                         len_seen += cam_sglist[i].ds_len;
 418                 }
 419                 break;
 420         }
 421         case CAM_DATA_VADDR:
 422                 cam_sglist = &cam_sg_entry;
 423                 cam_sglist[0].ds_len = ccb->csio.dxfer_len;
 424                 cam_sglist[0].ds_addr = (bus_addr_t)ccb->csio.data_ptr;
 425                 cam_sg_count = 1;
 426                 cam_sg_start = 0;
 427                 cam_sg_offset = io->scsiio.kern_rel_offset;
 428                 break;
 429         default:
 430                 panic("Invalid CAM flags %#x", ccb->ccb_h.flags);
 431         }
 432
 433         if (io->scsiio.kern_sg_entries > 0) {
 434                 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr;
 435                 ctl_sg_count = io->scsiio.kern_sg_entries;
 436         } else {
 437                 ctl_sglist = &ctl_sg_entry;
 438                 ctl_sglist->addr = io->scsiio.kern_data_ptr;
 439                 ctl_sglist->len = io->scsiio.kern_data_len;
 440                 ctl_sg_count = 1;
 441         }
 442
 443         ctl_watermark = 0;
 444         cam_watermark = cam_sg_offset;
 445         len_copied = 0;
 446         for (i = cam_sg_start, j = 0;
 447              i < cam_sg_count && j < ctl_sg_count;) {
 448                 uint8_t *cam_ptr, *ctl_ptr;
 449
 450                 len_to_copy = ctl_min(cam_sglist[i].ds_len - cam_watermark,
 451                                       ctl_sglist[j].len - ctl_watermark);
 452
 453                 cam_ptr = (uint8_t *)cam_sglist[i].ds_addr;
 454                 cam_ptr = cam_ptr + cam_watermark;
 455                 if (io->io_hdr.flags & CTL_FLAG_BUS_ADDR) {
 456                         /*
 457                          * XXX KDM fix this!
 458                          */
 459                         panic("need to implement bus address support");
 460 #if 0
 461                         kern_ptr = bus_to_virt(kern_sglist[j].addr);
 462 #endif
 463                 } else
 464                         ctl_ptr = (uint8_t *)ctl_sglist[j].addr;
 465                 ctl_ptr = ctl_ptr + ctl_watermark;
 466
 467                 ctl_watermark += len_to_copy;
 468                 cam_watermark += len_to_copy;
 469
 470                 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) ==
 471                      CTL_FLAG_DATA_IN) {
 472                         CTL_DEBUG_PRINT(("%s: copying %d bytes to CAM\n",
 473                                          __func__, len_to_copy));
 474                         CTL_DEBUG_PRINT(("%s: from %p to %p\n", ctl_ptr,
 475                                          __func__, cam_ptr));
 476                         bcopy(ctl_ptr, cam_ptr, len_to_copy);
 477                 } else {
 478                         CTL_DEBUG_PRINT(("%s: copying %d bytes from CAM\n",
 479                                          __func__, len_to_copy));
 480                         CTL_DEBUG_PRINT(("%s: from %p to %p\n", cam_ptr,
 481                                          __func__, ctl_ptr));
 482                         bcopy(cam_ptr, ctl_ptr, len_to_copy);
 483                 }
 484
 485                 len_copied += len_to_copy;
 486
 487                 if (cam_sglist[i].ds_len == cam_watermark) {
 488                         i++;
 489                         cam_watermark = 0;
 490                 }
 491
 492                 if (ctl_sglist[j].len == ctl_watermark) {
 493                         j++;
 494                         ctl_watermark = 0;
 495                 }
 496         }
 497
 498         io->scsiio.ext_data_filled += len_copied;
 499
 500         io->scsiio.be_move_done(io);
 501 }
 502
 503 static void
 504 cfcs_done(union ctl_io *io)
 505 {
 506         union ccb *ccb;
 507         struct cfcs_softc *softc;
 508         struct cam_sim *sim;
 509
 510         ccb = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
 511
 512         sim = xpt_path_sim(ccb->ccb_h.path);
 513         softc = (struct cfcs_softc *)cam_sim_softc(sim);
 514
 515         /*
 516          * At this point we should have status.  If we don't, that's a bug.
 517          */
 518         KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE),
 519                 ("invalid CTL status %#x", io->io_hdr.status));
 520
 521         /*
 522          * Translate CTL status to CAM status.
 523          */
 524         switch (io->io_hdr.status & CTL_STATUS_MASK) {
 525         case CTL_SUCCESS:
 526                 ccb->ccb_h.status = CAM_REQ_CMP;
 527                 break;
 528         case CTL_SCSI_ERROR:
 529                 ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID;
 530                 ccb->csio.scsi_status = io->scsiio.scsi_status;
 531                 bcopy(&io->scsiio.sense_data, &ccb->csio.sense_data,
 532                       min(io->scsiio.sense_len, ccb->csio.sense_len));
 533                 if (ccb->csio.sense_len > io->scsiio.sense_len)
 534                         ccb->csio.sense_resid = ccb->csio.sense_len -
 535                                                 io->scsiio.sense_len;
 536                 else
 537                         ccb->csio.sense_resid = 0;
 538                 if ((ccb->csio.sense_len - ccb->csio.sense_resid) >
 539                      cfcs_max_sense) {
 540                         ccb->csio.sense_resid = ccb->csio.sense_len -
 541                                                 cfcs_max_sense;
 542                 }
 543                 break;
 544         case CTL_CMD_ABORTED:
 545                 ccb->ccb_h.status = CAM_REQ_ABORTED;
 546                 break;
 547         case CTL_ERROR:
 548         default:
 549                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 550                 break;
 551         }
 552
 553         mtx_lock(sim->mtx);
 554         xpt_done(ccb);
 555         mtx_unlock(sim->mtx);
 556
 557         ctl_free_io(io);
 558 }
 559
 560 void
 561 cfcs_action(struct cam_sim *sim, union ccb *ccb)
 562 {
 563         struct cfcs_softc *softc;
 564         int err;
 565
 566         softc = (struct cfcs_softc *)cam_sim_softc(sim);
 567         mtx_assert(&softc->lock, MA_OWNED);
 568
 569         switch (ccb->ccb_h.func_code) {
 570         case XPT_SCSI_IO: {
 571                 union ctl_io *io;
 572                 struct ccb_scsiio *csio;
 573
 574                 csio = &ccb->csio;
 575
 576                 /*
 577                  * Catch CCB flags, like physical address flags, that
 578                  * indicate situations we currently can't handle.
 579                  */
 580                 if (ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS) {
 581                         ccb->ccb_h.status = CAM_REQ_INVALID;
 582                         printf("%s: bad CCB flags %#x (all flags %#x)\n",
 583                                __func__, ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS,
 584                                ccb->ccb_h.flags);
 585                         xpt_done(ccb);
 586                         return;
 587                 }
 588
 589                 /*
 590                  * If we aren't online, there are no devices to see.
 591                  */
 592                 if (softc->online == 0) {
 593                         ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 594                         xpt_done(ccb);
 595                         return;
 596                 }
 597
 598                 io = ctl_alloc_io(softc->fe.ctl_pool_ref);
 599                 if (io == NULL) {
 600                         printf("%s: can't allocate ctl_io\n", __func__);
 601                         ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
 602                         xpt_freeze_devq(ccb->ccb_h.path, 1);
 603                         xpt_done(ccb);
 604                         return;
 605                 }
 606                 ctl_zero_io(io);
 607                 /* Save pointers on both sides */
 608                 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
 609                 ccb->ccb_h.io_ptr = io;
 610
 611                 /*
 612                  * Only SCSI I/O comes down this path, resets, etc. come
 613                  * down via the XPT_RESET_BUS/LUN CCBs below.
 614                  */
 615                 io->io_hdr.io_type = CTL_IO_SCSI;
 616                 io->io_hdr.nexus.initid.id = 1;
 617                 io->io_hdr.nexus.targ_port = softc->fe.targ_port;
 618                 /*
 619                  * XXX KDM how do we handle target IDs?
 620                  */
 621                 io->io_hdr.nexus.targ_target.id = ccb->ccb_h.target_id;
 622                 io->io_hdr.nexus.targ_lun = ccb->ccb_h.target_lun;
 623                 /*
 624                  * This tag scheme isn't the best, since we could in theory
 625                  * have a very long-lived I/O and tag collision, especially
 626                  * in a high I/O environment.  But it should work well
 627                  * enough for now.  Since we're using unsigned ints,
 628                  * they'll just wrap around.
 629                  */
 630                 io->scsiio.tag_num = softc->cur_tag_num++;
 631                 csio->tag_id = io->scsiio.tag_num;
 632                 switch (csio->tag_action) {
 633                 case CAM_TAG_ACTION_NONE:
 634                         io->scsiio.tag_type = CTL_TAG_UNTAGGED;
 635                         break;
 636                 case MSG_SIMPLE_TASK:
 637                         io->scsiio.tag_type = CTL_TAG_SIMPLE;
 638                         break;
 639                 case MSG_HEAD_OF_QUEUE_TASK:
 640                         io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
 641                         break;
 642                 case MSG_ORDERED_TASK:
 643                         io->scsiio.tag_type = CTL_TAG_ORDERED;
 644                         break;
 645                 case MSG_ACA_TASK:
 646                         io->scsiio.tag_type = CTL_TAG_ACA;
 647                         break;
 648                 default:
 649                         io->scsiio.tag_type = CTL_TAG_UNTAGGED;
 650                         printf("%s: unhandled tag type %#x!!\n", __func__,
 651                                csio->tag_action);
 652                         break;
 653                 }
 654                 if (csio->cdb_len > sizeof(io->scsiio.cdb)) {
 655                         printf("%s: WARNING: CDB len %d > ctl_io space %zd\n",
 656                                __func__, csio->cdb_len, sizeof(io->scsiio.cdb));
 657                 }
 658                 io->scsiio.cdb_len = min(csio->cdb_len, sizeof(io->scsiio.cdb));
 659                 bcopy(csio->cdb_io.cdb_bytes, io->scsiio.cdb,
 660                       io->scsiio.cdb_len);
 661
 662                 err = ctl_queue(io);
 663                 if (err != CTL_RETVAL_COMPLETE) {
 664                         printf("%s: func %d: error %d returned by "
 665                                "ctl_queue()!\n", __func__,
 666                                ccb->ccb_h.func_code, err);
 667                         ctl_free_io(io);
 668                 } else {
 669                         ccb->ccb_h.status |= CAM_SIM_QUEUED;
 670                 }
 671                 break;
 672         }
 673         case XPT_ABORT: {
 674                 union ctl_io *io;
 675                 union ccb *abort_ccb;
 676
 677                 abort_ccb = ccb->cab.abort_ccb;
 678
 679                 if (abort_ccb->ccb_h.func_code != XPT_SCSI_IO) {
 680                         ccb->ccb_h.status = CAM_REQ_INVALID;
 681                         xpt_done(ccb);
 682                 }
 683
 684                 /*
 685                  * If we aren't online, there are no devices to talk to.
 686                  */
 687                 if (softc->online == 0) {
 688                         ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 689                         xpt_done(ccb);
 690                         return;
 691                 }
 692
 693                 io = ctl_alloc_io(softc->fe.ctl_pool_ref);
 694                 if (io == NULL) {
 695                         ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
 696                         xpt_freeze_devq(ccb->ccb_h.path, 1);
 697                         xpt_done(ccb);
 698                         return;
 699                 }
 700
 701                 ctl_zero_io(io);
 702                 /* Save pointers on both sides */
 703                 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
 704                 ccb->ccb_h.io_ptr = io;
 705
 706                 io->io_hdr.io_type = CTL_IO_TASK;
 707                 io->io_hdr.nexus.initid.id = 1;
 708                 io->io_hdr.nexus.targ_port = softc->fe.targ_port;
 709                 io->io_hdr.nexus.targ_target.id = ccb->ccb_h.target_id;
 710                 io->io_hdr.nexus.targ_lun = ccb->ccb_h.target_lun;
 711                 io->taskio.task_action = CTL_TASK_ABORT_TASK;
 712                 io->taskio.tag_num = abort_ccb->csio.tag_id;
 713                 switch (abort_ccb->csio.tag_action) {
 714                 case CAM_TAG_ACTION_NONE:
 715                         io->taskio.tag_type = CTL_TAG_UNTAGGED;
 716                         break;
 717                 case MSG_SIMPLE_TASK:
 718                         io->taskio.tag_type = CTL_TAG_SIMPLE;
 719                         break;
 720                 case MSG_HEAD_OF_QUEUE_TASK:
 721                         io->taskio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
 722                         break;
 723                 case MSG_ORDERED_TASK:
 724                         io->taskio.tag_type = CTL_TAG_ORDERED;
 725                         break;
 726                 case MSG_ACA_TASK:
 727                         io->taskio.tag_type = CTL_TAG_ACA;
 728                         break;
 729                 default:
 730                         io->taskio.tag_type = CTL_TAG_UNTAGGED;
 731                         printf("%s: unhandled tag type %#x!!\n", __func__,
 732                                abort_ccb->csio.tag_action);
 733                         break;
 734                 }
 735                 err = ctl_queue(io);
 736                 if (err != CTL_RETVAL_COMPLETE) {
 737                         printf("%s func %d: error %d returned by "
 738                                "ctl_queue()!\n", __func__,
 739                                ccb->ccb_h.func_code, err);
 740                         ctl_free_io(io);
 741                 }
 742                 break;
 743         }
 744         case XPT_GET_TRAN_SETTINGS: {
 745                 struct ccb_trans_settings *cts;
 746                 struct ccb_trans_settings_scsi *scsi;
 747                 struct ccb_trans_settings_fc *fc;
 748
 749                 cts = &ccb->cts;
 750                 scsi = &cts->proto_specific.scsi;
 751                 fc = &cts->xport_specific.fc;
 752
 753
 754                 cts->protocol = PROTO_SCSI;
 755                 cts->protocol_version = SCSI_REV_SPC2;
 756                 cts->transport = XPORT_FC;
 757                 cts->transport_version = 0;
 758
 759                 scsi->valid = CTS_SCSI_VALID_TQ;
 760                 scsi->flags = CTS_SCSI_FLAGS_TAG_ENB;
 761                 fc->valid = CTS_FC_VALID_SPEED;
 762                 fc->bitrate = 800000;
 763                 fc->wwnn = softc->wwnn;
 764                 fc->wwpn = softc->wwpn;
 765                 fc->port = softc->fe.targ_port;
 766                 fc->valid |= CTS_FC_VALID_WWNN | CTS_FC_VALID_WWPN |
 767                         CTS_FC_VALID_PORT;
 768                 ccb->ccb_h.status = CAM_REQ_CMP;
 769                 break;
 770         }
 771         case XPT_SET_TRAN_SETTINGS:
 772                 /* XXX KDM should we actually do something here? */
 773                 ccb->ccb_h.status = CAM_REQ_CMP;
 774                 break;
 775         case XPT_RESET_BUS:
 776         case XPT_RESET_DEV: {
 777                 union ctl_io *io;
 778
 779                 /*
 780                  * If we aren't online, there are no devices to talk to.
 781                  */
 782                 if (softc->online == 0) {
 783                         ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 784                         xpt_done(ccb);
 785                         return;
 786                 }
 787
 788                 io = ctl_alloc_io(softc->fe.ctl_pool_ref);
 789                 if (io == NULL) {
 790                         ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
 791                         xpt_freeze_devq(ccb->ccb_h.path, 1);
 792                         xpt_done(ccb);
 793                         return;
 794                 }
 795
 796                 ctl_zero_io(io);
 797                 /* Save pointers on both sides */
 798                 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
 799                 ccb->ccb_h.io_ptr = io;
 800
 801                 io->io_hdr.io_type = CTL_IO_TASK;
 802                 io->io_hdr.nexus.initid.id = 0;
 803                 io->io_hdr.nexus.targ_port = softc->fe.targ_port;
 804                 io->io_hdr.nexus.targ_target.id = ccb->ccb_h.target_id;
 805                 io->io_hdr.nexus.targ_lun = ccb->ccb_h.target_lun;
 806                 if (ccb->ccb_h.func_code == XPT_RESET_BUS)
 807                         io->taskio.task_action = CTL_TASK_BUS_RESET;
 808                 else
 809                         io->taskio.task_action = CTL_TASK_LUN_RESET;
 810
 811                 err = ctl_queue(io);
 812                 if (err != CTL_RETVAL_COMPLETE) {
 813                         printf("%s func %d: error %d returned by "
 814                               "ctl_queue()!\n", __func__,
 815                               ccb->ccb_h.func_code, err);
 816                         ctl_free_io(io);
 817                 }
 818                 break;
 819         }
 820         case XPT_CALC_GEOMETRY:
 821                 cam_calc_geometry(&ccb->ccg, 1);
 822                 xpt_done(ccb);
 823                 break;
 824         case XPT_PATH_INQ: {
 825                 struct ccb_pathinq *cpi;
 826
 827                 cpi = &ccb->cpi;
 828
 829                 cpi->version_num = 0;
 830                 cpi->hba_inquiry = PI_TAG_ABLE;
 831                 cpi->target_sprt = 0;
 832                 cpi->hba_misc = 0;
 833                 cpi->hba_eng_cnt = 0;
 834                 cpi->max_target = 1;
 835                 cpi->max_lun = 1024;
 836                 /* Do we really have a limit? */
 837                 cpi->maxio = 1024 * 1024;
 838                 cpi->async_flags = 0;
 839                 cpi->hpath_id = 0;
 840                 cpi->initiator_id = 0;
 841
 842                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
 843                 strncpy(cpi->hba_vid, "FreeBSD", HBA_IDLEN);
 844                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
 845                 cpi->unit_number = 0;
 846                 cpi->bus_id = 0;
 847                 cpi->base_transfer_speed = 800000;
 848                 cpi->protocol = PROTO_SCSI;
 849                 cpi->protocol_version = SCSI_REV_SPC2;
 850                 /*
 851                  * Pretend to be Fibre Channel.
 852                  */
 853                 cpi->transport = XPORT_FC;
 854                 cpi->transport_version = 0;
 855                 cpi->xport_specific.fc.wwnn = softc->wwnn;
 856                 cpi->xport_specific.fc.wwpn = softc->wwpn;
 857                 cpi->xport_specific.fc.port = softc->fe.targ_port;
 858                 cpi->xport_specific.fc.bitrate = 8 * 1000 * 1000;
 859                 cpi->ccb_h.status = CAM_REQ_CMP;
 860                 break;
 861         }
 862         default:
 863                 ccb->ccb_h.status = CAM_PROVIDE_FAIL;
 864                 printf("%s: unsupported CCB type %#x\n", __func__,
 865                        ccb->ccb_h.func_code);
 866                 xpt_done(ccb);
 867                 break;
 868         }
 869 }
 870
 871 static void
 872 cfcs_async(void *callback_arg, uint32_t code, struct cam_path *path, void *arg)
 873 {
 874
 875 }