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