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