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