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