sys/cam/ctl/ctl_frontend_cam_sim.c

   1 /*-
   2  * Copyright (c) 2009 Silicon Graphics International Corp.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions, and the following disclaimer,
  10  *    without modification.
  11  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  12  *    substantially similar to the "NO WARRANTY" disclaimer below
  13  *    ("Disclaimer") and any redistribution must be conditioned upon
  14  *    including a substantially similar Disclaimer requirement for further
  15  *    binary redistribution.
  16  *
  17  * NO WARRANTY
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  26  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  27  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGES.
  29  *
  30  * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_frontend_cam_sim.c#4 $
  31  */
  32 /*
  33  * CTL frontend to CAM SIM interface.  This allows access to CTL LUNs via
  34  * the da(4) and pass(4) drivers from inside the system.
  35  *
  36  * Author: Ken Merry <ken@FreeBSD.org>
  37  */
  38
  39 #include <sys/cdefs.h>
  40 __FBSDID("$FreeBSD$");
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/kernel.h>
  45 #include <sys/types.h>
  46 #include <sys/malloc.h>
  47 #include <sys/lock.h>
  48 #include <sys/mutex.h>
  49 #include <sys/condvar.h>
  50 #include <sys/queue.h>
  51 #include <sys/bus.h>
  52 #include <sys/sysctl.h>
  53 #include <machine/bus.h>
  54 #include <sys/sbuf.h>
  55
  56 #include <cam/cam.h>
  57 #include <cam/cam_ccb.h>
  58 #include <cam/cam_sim.h>
  59 #include <cam/cam_xpt_sim.h>
  60 #include <cam/cam_xpt.h>
  61 #include <cam/cam_periph.h>
  62 #include <cam/scsi/scsi_all.h>
  63 #include <cam/scsi/scsi_message.h>
  64 #include <cam/ctl/ctl_io.h>
  65 #include <cam/ctl/ctl.h>
  66 #include <cam/ctl/ctl_frontend.h>
  67 #include <cam/ctl/ctl_frontend_internal.h>
  68 #include <cam/ctl/ctl_mem_pool.h>
  69 #include <cam/ctl/ctl_debug.h>
  70
  71 #define io_ptr          spriv_ptr1
  72
  73 struct cfcs_io {
  74         union ccb *ccb;
  75 };
  76
  77 struct cfcs_softc {
  78         struct ctl_frontend fe;
  79         char port_name[32];
  80         struct cam_sim *sim;
  81         struct cam_devq *devq;
  82         struct cam_path *path;
  83         struct mtx lock;
  84         char lock_desc[32];
  85         uint64_t wwnn;
  86         uint64_t wwpn;
  87         uint32_t cur_tag_num;
  88         int online;
  89 };
  90
  91 /*
  92  * We can't handle CCBs with these flags.  For the most part, we just don't
  93  * handle physical addresses yet.  That would require mapping things in
  94  * order to do the copy.
  95  */
  96 #define CFCS_BAD_CCB_FLAGS (CAM_DATA_PHYS | CAM_SG_LIST_PHYS | \
  97         CAM_MSG_BUF_PHYS | CAM_SNS_BUF_PHYS | CAM_CDB_PHYS | CAM_SENSE_PTR |\
  98         CAM_SENSE_PHYS)
  99
 100 int cfcs_init(void);
 101 void cfcs_shutdown(void);
 102 static void cfcs_poll(struct cam_sim *sim);
 103 static void cfcs_online(void *arg);
 104 static void cfcs_offline(void *arg);
 105 static int cfcs_targ_enable(void *arg, struct ctl_id targ_id);
 106 static int cfcs_targ_disable(void *arg, struct ctl_id targ_id);
 107 static int cfcs_lun_enable(void *arg, struct ctl_id target_id, int lun_id);
 108 static int cfcs_lun_disable(void *arg, struct ctl_id target_id, int lun_id);
 109 static void cfcs_datamove(union ctl_io *io);
 110 static void cfcs_done(union ctl_io *io);
 111 void cfcs_action(struct cam_sim *sim, union ccb *ccb);
 112 static void cfcs_async(void *callback_arg, uint32_t code,
 113                        struct cam_path *path, void *arg);
 114
 115 struct cfcs_softc cfcs_softc;
 116 /*
 117  * This is primarly intended to allow for error injection to test the CAM
 118  * sense data and sense residual handling code.  This sets the maximum
 119  * amount of SCSI sense data that we will report to CAM.
 120  */
 121 static int cfcs_max_sense = sizeof(struct scsi_sense_data);
 122 extern int ctl_disable;
 123
 124 SYSINIT(cfcs_init, SI_SUB_CONFIGURE, SI_ORDER_FOURTH, cfcs_init, NULL);
 125 SYSCTL_NODE(_kern_cam, OID_AUTO, ctl2cam, CTLFLAG_RD, 0,
 126             "CAM Target Layer SIM frontend");
 127 SYSCTL_INT(_kern_cam_ctl2cam, OID_AUTO, max_sense, CTLFLAG_RW,
 128            &cfcs_max_sense, 0, "Maximum sense data size");
 129
 130
 131 int
 132 cfcs_init(void)
 133 {
 134         struct cfcs_softc *softc;
 135         struct ccb_setasync csa;
 136         struct ctl_frontend *fe;
 137 #ifdef NEEDTOPORT
 138         char wwnn[8];
 139 #endif
 140         int retval;
 141
 142         /* Don't continue if CTL is disabled */
 143         if (ctl_disable != 0)
 144                 return (0);
 145
 146         softc = &cfcs_softc;
 147         retval = 0;
 148         bzero(softc, sizeof(*softc));
 149         sprintf(softc->lock_desc, "ctl2cam");
 150         mtx_init(&softc->lock, softc->lock_desc, NULL, MTX_DEF);
 151         fe = &softc->fe;
 152
 153         fe->port_type = CTL_PORT_INTERNAL;
 154         /* XXX KDM what should the real number be here? */
 155         fe->num_requested_ctl_io = 4096;
 156         snprintf(softc->port_name, sizeof(softc->port_name), "ctl2cam");
 157         fe->port_name = softc->port_name;
 158         fe->port_online = cfcs_online;
 159         fe->port_offline = cfcs_offline;
 160         fe->onoff_arg = softc;
 161         fe->targ_enable = cfcs_targ_enable;
 162         fe->targ_disable = cfcs_targ_disable;
 163         fe->lun_enable = cfcs_lun_enable;
 164         fe->lun_disable = cfcs_lun_disable;
 165         fe->targ_lun_arg = softc;
 166         fe->fe_datamove = cfcs_datamove;
 167         fe->fe_done = cfcs_done;
 168
 169         /* XXX KDM what should we report here? */
 170         /* XXX These should probably be fetched from CTL. */
 171         fe->max_targets = 1;
 172         fe->max_target_id = 15;
 173
 174         retval = ctl_frontend_register(fe, /*master_SC*/ 1);
 175         if (retval != 0) {
 176                 printf("%s: ctl_frontend_register() failed with error %d!\n",
 177                        __func__, retval);
 178                 retval = 1;
 179                 goto bailout;
 180         }
 181
 182         /*
 183          * Get the WWNN out of the database, and create a WWPN as well.
 184          */
 185 #ifdef NEEDTOPORT
 186         ddb_GetWWNN((char *)wwnn);
 187         softc->wwnn = be64dec(wwnn);
 188         softc->wwpn = softc->wwnn + (softc->fe.targ_port & 0xff);
 189 #endif
 190
 191         /*
 192          * If the CTL frontend didn't tell us what our WWNN/WWPN is, go
 193          * ahead and set something random.
 194          */
 195         if (fe->wwnn == 0) {
 196                 uint64_t random_bits;
 197
 198                 arc4rand(&random_bits, sizeof(random_bits), 0);
 199                 softc->wwnn = (random_bits & 0x0000000fffffff00ULL) |
 200                         /* Company ID */ 0x5000000000000000ULL |
 201                         /* NL-Port */    0x0300;
 202                 softc->wwpn = softc->wwnn + fe->targ_port + 1;
 203                 fe->wwnn = softc->wwnn;
 204                 fe->wwpn = softc->wwpn;
 205         } else {
 206                 softc->wwnn = fe->wwnn;
 207                 softc->wwpn = fe->wwpn;
 208         }
 209
 210
 211         softc->devq = cam_simq_alloc(fe->num_requested_ctl_io);
 212         if (softc->devq == NULL) {
 213                 printf("%s: error allocating devq\n", __func__);
 214                 retval = ENOMEM;
 215                 goto bailout;
 216         }
 217
 218         softc->sim = cam_sim_alloc(cfcs_action, cfcs_poll, softc->port_name,
 219                                    softc, /*unit*/ 0, &softc->lock, 1,
 220                                    fe->num_requested_ctl_io, softc->devq);
 221         if (softc->sim == NULL) {
 222                 printf("%s: error allocating SIM\n", __func__);
 223                 retval = ENOMEM;
 224                 goto bailout;
 225         }
 226
 227         mtx_lock(&softc->lock);
 228         if (xpt_bus_register(softc->sim, NULL, 0) != CAM_SUCCESS) {
 229                 mtx_unlock(&softc->lock);
 230                 printf("%s: error registering SIM\n", __func__);
 231                 retval = ENOMEM;
 232                 goto bailout;
 233         }
 234
 235         if (xpt_create_path(&softc->path, /*periph*/NULL,
 236                             cam_sim_path(softc->sim),
 237                             CAM_TARGET_WILDCARD,
 238                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 239                 mtx_unlock(&softc->lock);
 240                 printf("%s: error creating path\n", __func__);
 241                 xpt_bus_deregister(cam_sim_path(softc->sim));
 242                 retval = 1;
 243                 goto bailout;
 244         }
 245
 246         mtx_unlock(&softc->lock);
 247
 248         xpt_setup_ccb(&csa.ccb_h, softc->path, /*priority*/ 5);
 249         csa.ccb_h.func_code = XPT_SASYNC_CB;
 250         csa.event_enable = AC_LOST_DEVICE;
 251         csa.callback = cfcs_async;
 252         csa.callback_arg = softc->sim;
 253         xpt_action((union ccb *)&csa);
 254
 255         return (retval);
 256
 257 bailout:
 258         if (softc->sim)
 259                 cam_sim_free(softc->sim, /*free_devq*/ TRUE);
 260         else if (softc->devq)
 261                 cam_simq_free(softc->devq);
 262
 263         return (retval);
 264 }
 265
 266 static void
 267 cfcs_poll(struct cam_sim *sim)
 268 {
 269
 270 }
 271
 272 void
 273 cfcs_shutdown(void)
 274 {
 275
 276 }
 277
 278 static void
 279 cfcs_online(void *arg)
 280 {
 281         struct cfcs_softc *softc;
 282         union ccb *ccb;
 283
 284         softc = (struct cfcs_softc *)arg;
 285
 286         mtx_lock(&softc->lock);
 287         softc->online = 1;
 288         mtx_unlock(&softc->lock);
 289
 290         ccb = xpt_alloc_ccb_nowait();
 291         if (ccb == NULL) {
 292                 printf("%s: unable to allocate CCB for rescan\n", __func__);
 293                 return;
 294         }
 295
 296         if (xpt_create_path(&ccb->ccb_h.path, xpt_periph,
 297                             cam_sim_path(softc->sim), CAM_TARGET_WILDCARD,
 298                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 299                 printf("%s: can't allocate path for rescan\n", __func__);
 300                 xpt_free_ccb(ccb);
 301                 return;
 302         }
 303         xpt_rescan(ccb);
 304 }
 305
 306 static void
 307 cfcs_offline(void *arg)
 308 {
 309         struct cfcs_softc *softc;
 310         union ccb *ccb;
 311
 312         softc = (struct cfcs_softc *)arg;
 313
 314         mtx_lock(&softc->lock);
 315         softc->online = 0;
 316         mtx_unlock(&softc->lock);
 317
 318         ccb = xpt_alloc_ccb_nowait();
 319         if (ccb == NULL) {
 320                 printf("%s: unable to allocate CCB for rescan\n", __func__);
 321                 return;
 322         }
 323
 324         if (xpt_create_path(&ccb->ccb_h.path, xpt_periph,
 325                             cam_sim_path(softc->sim), CAM_TARGET_WILDCARD,
 326                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 327                 printf("%s: can't allocate path for rescan\n", __func__);
 328                 xpt_free_ccb(ccb);
 329                 return;
 330         }
 331         xpt_rescan(ccb);
 332 }
 333
 334 static int
 335 cfcs_targ_enable(void *arg, struct ctl_id targ_id)
 336 {
 337         return (0);
 338 }
 339
 340 static int
 341 cfcs_targ_disable(void *arg, struct ctl_id targ_id)
 342 {
 343         return (0);
 344 }
 345
 346 static int
 347 cfcs_lun_enable(void *arg, struct ctl_id target_id, int lun_id)
 348 {
 349         return (0);
 350 }
 351 static int
 352 cfcs_lun_disable(void *arg, struct ctl_id target_id, int lun_id)
 353 {
 354         return (0);
 355 }
 356
 357 /*
 358  * This function is very similar to ctl_ioctl_do_datamove().  Is there a
 359  * way to combine the functionality?
 360  *
 361  * XXX KDM may need to move this into a thread.  We're doing a bcopy in the
 362  * caller's context, which will usually be the backend.  That may not be a
 363  * good thing.
 364  */
 365 static void
 366 cfcs_datamove(union ctl_io *io)
 367 {
 368         union ccb *ccb;
 369         bus_dma_segment_t cam_sg_entry, *cam_sglist;
 370         struct ctl_sg_entry ctl_sg_entry, *ctl_sglist;
 371         int cam_sg_count, ctl_sg_count, cam_sg_start;
 372         int cam_sg_offset;
 373         int len_to_copy, len_copied;
 374         int ctl_watermark, cam_watermark;
 375         int i, j;
 376
 377
 378         cam_sg_offset = 0;
 379         cam_sg_start = 0;
 380
 381         ccb = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
 382
 383         /*
 384          * Note that we have a check in cfcs_action() to make sure that any
 385          * CCBs with "bad" flags are returned with CAM_REQ_INVALID.  This
 386          * is just to make sure no one removes that check without updating
 387          * this code to provide the additional functionality necessary to
 388          * support those modes of operation.
 389          */
 390         KASSERT(((ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS) == 0), ("invalid "
 391                   "CAM flags %#x", (ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS)));
 392
 393         /*
 394          * Simplify things on both sides by putting single buffers into a
 395          * single entry S/G list.
 396          */
 397         if (ccb->ccb_h.flags & CAM_SCATTER_VALID) {
 398                 if (ccb->ccb_h.flags & CAM_SG_LIST_PHYS) {
 399                         /* We should filter this out on entry */
 400                         panic("%s: physical S/G list, should not get here",
 401                               __func__);
 402                 } else {
 403                         int len_seen;
 404
 405                         cam_sglist = (bus_dma_segment_t *)ccb->csio.data_ptr;
 406                         cam_sg_count = ccb->csio.sglist_cnt;
 407
 408                         for (i = 0, len_seen = 0; i < cam_sg_count; i++) {
 409                                 if ((len_seen + cam_sglist[i].ds_len) >=
 410                                      io->scsiio.kern_rel_offset) {
 411                                         cam_sg_start = i;
 412                                         cam_sg_offset =
 413                                                 io->scsiio.kern_rel_offset -
 414                                                 len_seen;
 415                                         break;
 416                                 }
 417                                 len_seen += cam_sglist[i].ds_len;
 418                         }
 419                 }
 420         } else {
 421                 cam_sglist = &cam_sg_entry;
 422                 cam_sglist[0].ds_len = ccb->csio.dxfer_len;
 423                 cam_sglist[0].ds_addr = (bus_addr_t)ccb->csio.data_ptr;
 424                 cam_sg_count = 1;
 425                 cam_sg_start = 0;
 426                 cam_sg_offset = io->scsiio.kern_rel_offset;
 427         }
 428
 429         if (io->scsiio.kern_sg_entries > 0) {
 430                 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr;
 431                 ctl_sg_count = io->scsiio.kern_sg_entries;
 432         } else {
 433                 ctl_sglist = &ctl_sg_entry;
 434                 ctl_sglist->addr = io->scsiio.kern_data_ptr;
 435                 ctl_sglist->len = io->scsiio.kern_data_len;
 436                 ctl_sg_count = 1;
 437         }
 438
 439         ctl_watermark = 0;
 440         cam_watermark = cam_sg_offset;
 441         len_copied = 0;
 442         for (i = cam_sg_start, j = 0;
 443              i < cam_sg_count && j < ctl_sg_count;) {
 444                 uint8_t *cam_ptr, *ctl_ptr;
 445
 446                 len_to_copy = ctl_min(cam_sglist[i].ds_len - cam_watermark,
 447                                       ctl_sglist[j].len - ctl_watermark);
 448
 449                 cam_ptr = (uint8_t *)cam_sglist[i].ds_addr;
 450                 cam_ptr = cam_ptr + cam_watermark;
 451                 if (io->io_hdr.flags & CTL_FLAG_BUS_ADDR) {
 452                         /*
 453                          * XXX KDM fix this!
 454                          */
 455                         panic("need to implement bus address support");
 456 #if 0
 457                         kern_ptr = bus_to_virt(kern_sglist[j].addr);
 458 #endif
 459                 } else
 460                         ctl_ptr = (uint8_t *)ctl_sglist[j].addr;
 461                 ctl_ptr = ctl_ptr + ctl_watermark;
 462
 463                 ctl_watermark += len_to_copy;
 464                 cam_watermark += len_to_copy;
 465
 466                 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) ==
 467                      CTL_FLAG_DATA_IN) {
 468                         CTL_DEBUG_PRINT(("%s: copying %d bytes to CAM\n",
 469                                          __func__, len_to_copy));
 470                         CTL_DEBUG_PRINT(("%s: from %p to %p\n", ctl_ptr,
 471                                          __func__, cam_ptr));
 472                         bcopy(ctl_ptr, cam_ptr, len_to_copy);
 473                 } else {
 474                         CTL_DEBUG_PRINT(("%s: copying %d bytes from CAM\n",
 475                                          __func__, len_to_copy));
 476                         CTL_DEBUG_PRINT(("%s: from %p to %p\n", cam_ptr,
 477                                          __func__, ctl_ptr));
 478                         bcopy(cam_ptr, ctl_ptr, len_to_copy);
 479                 }
 480
 481                 len_copied += len_to_copy;
 482
 483                 if (cam_sglist[i].ds_len == cam_watermark) {
 484                         i++;
 485                         cam_watermark = 0;
 486                 }
 487
 488                 if (ctl_sglist[j].len == ctl_watermark) {
 489                         j++;
 490                         ctl_watermark = 0;
 491                 }
 492         }
 493
 494         io->scsiio.ext_data_filled += len_copied;
 495
 496         io->scsiio.be_move_done(io);
 497 }
 498
 499 static void
 500 cfcs_done(union ctl_io *io)
 501 {
 502         union ccb *ccb;
 503         struct cfcs_softc *softc;
 504         struct cam_sim *sim;
 505
 506         ccb = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
 507
 508         sim = xpt_path_sim(ccb->ccb_h.path);
 509         softc = (struct cfcs_softc *)cam_sim_softc(sim);
 510
 511         /*
 512          * At this point we should have status.  If we don't, that's a bug.
 513          */
 514         KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE),
 515                 ("invalid CTL status %#x", io->io_hdr.status));
 516
 517         /*
 518          * Translate CTL status to CAM status.
 519          */
 520         switch (io->io_hdr.status & CTL_STATUS_MASK) {
 521         case CTL_SUCCESS:
 522                 ccb->ccb_h.status = CAM_REQ_CMP;
 523                 break;
 524         case CTL_SCSI_ERROR:
 525                 ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID;
 526                 ccb->csio.scsi_status = io->scsiio.scsi_status;
 527                 bcopy(&io->scsiio.sense_data, &ccb->csio.sense_data,
 528                       min(io->scsiio.sense_len, ccb->csio.sense_len));
 529                 if (ccb->csio.sense_len > io->scsiio.sense_len)
 530                         ccb->csio.sense_resid = ccb->csio.sense_len -
 531                                                 io->scsiio.sense_len;
 532                 else
 533                         ccb->csio.sense_resid = 0;
 534                 if ((ccb->csio.sense_len - ccb->csio.sense_resid) >
 535                      cfcs_max_sense) {
 536                         ccb->csio.sense_resid = ccb->csio.sense_len -
 537                                                 cfcs_max_sense;
 538                 }
 539                 break;
 540         case CTL_CMD_ABORTED:
 541                 ccb->ccb_h.status = CAM_REQ_ABORTED;
 542                 break;
 543         case CTL_ERROR:
 544         default:
 545                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 546                 break;
 547         }
 548
 549         mtx_lock(sim->mtx);
 550         xpt_done(ccb);
 551         mtx_unlock(sim->mtx);
 552
 553         ctl_free_io(io);
 554 }
 555
 556 void
 557 cfcs_action(struct cam_sim *sim, union ccb *ccb)
 558 {
 559         struct cfcs_softc *softc;
 560         int err;
 561
 562         softc = (struct cfcs_softc *)cam_sim_softc(sim);
 563         mtx_assert(&softc->lock, MA_OWNED);
 564
 565         switch (ccb->ccb_h.func_code) {
 566         case XPT_SCSI_IO: {
 567                 union ctl_io *io;
 568                 struct ccb_scsiio *csio;
 569
 570                 csio = &ccb->csio;
 571
 572                 /*
 573                  * Catch CCB flags, like physical address flags, that
 574                  * indicate situations we currently can't handle.
 575                  */
 576                 if (ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS) {
 577                         ccb->ccb_h.status = CAM_REQ_INVALID;
 578                         printf("%s: bad CCB flags %#x (all flags %#x)\n",
 579                                __func__, ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS,
 580                                ccb->ccb_h.flags);
 581                         xpt_done(ccb);
 582                         return;
 583                 }
 584
 585                 /*
 586                  * If we aren't online, there are no devices to see.
 587                  */
 588                 if (softc->online == 0) {
 589                         ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 590                         xpt_done(ccb);
 591                         return;
 592                 }
 593
 594                 io = ctl_alloc_io(softc->fe.ctl_pool_ref);
 595                 if (io == NULL) {
 596                         printf("%s: can't allocate ctl_io\n", __func__);
 597                         ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
 598                         xpt_freeze_devq(ccb->ccb_h.path, 1);
 599                         xpt_done(ccb);
 600                         return;
 601                 }
 602                 ctl_zero_io(io);
 603                 /* Save pointers on both sides */
 604                 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
 605                 ccb->ccb_h.io_ptr = io;
 606
 607                 /*
 608                  * Only SCSI I/O comes down this path, resets, etc. come
 609                  * down via the XPT_RESET_BUS/LUN CCBs below.
 610                  */
 611                 io->io_hdr.io_type = CTL_IO_SCSI;
 612                 io->io_hdr.nexus.initid.id = 1;
 613                 io->io_hdr.nexus.targ_port = softc->fe.targ_port;
 614                 /*
 615                  * XXX KDM how do we handle target IDs?
 616                  */
 617                 io->io_hdr.nexus.targ_target.id = ccb->ccb_h.target_id;
 618                 io->io_hdr.nexus.targ_lun = ccb->ccb_h.target_lun;
 619                 /*
 620                  * This tag scheme isn't the best, since we could in theory
 621                  * have a very long-lived I/O and tag collision, especially
 622                  * in a high I/O environment.  But it should work well
 623                  * enough for now.  Since we're using unsigned ints,
 624                  * they'll just wrap around.
 625                  */
 626                 io->scsiio.tag_num = softc->cur_tag_num++;
 627                 csio->tag_id = io->scsiio.tag_num;
 628                 switch (csio->tag_action) {
 629                 case CAM_TAG_ACTION_NONE:
 630                         io->scsiio.tag_type = CTL_TAG_UNTAGGED;
 631                         break;
 632                 case MSG_SIMPLE_TASK:
 633                         io->scsiio.tag_type = CTL_TAG_SIMPLE;
 634                         break;
 635                 case MSG_HEAD_OF_QUEUE_TASK:
 636                         io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
 637                         break;
 638                 case MSG_ORDERED_TASK:
 639                         io->scsiio.tag_type = CTL_TAG_ORDERED;
 640                         break;
 641                 case MSG_ACA_TASK:
 642                         io->scsiio.tag_type = CTL_TAG_ACA;
 643                         break;
 644                 default:
 645                         io->scsiio.tag_type = CTL_TAG_UNTAGGED;
 646                         printf("%s: unhandled tag type %#x!!\n", __func__,
 647                                csio->tag_action);
 648                         break;
 649                 }
 650                 if (csio->cdb_len > sizeof(io->scsiio.cdb)) {
 651                         printf("%s: WARNING: CDB len %d > ctl_io space %zd\n",
 652                                __func__, csio->cdb_len, sizeof(io->scsiio.cdb));
 653                 }
 654                 io->scsiio.cdb_len = min(csio->cdb_len, sizeof(io->scsiio.cdb));
 655                 bcopy(csio->cdb_io.cdb_bytes, io->scsiio.cdb,
 656                       io->scsiio.cdb_len);
 657
 658                 err = ctl_queue(io);
 659                 if (err != CTL_RETVAL_COMPLETE) {
 660                         printf("%s: func %d: error %d returned by "
 661                                "ctl_queue()!\n", __func__,
 662                                ccb->ccb_h.func_code, err);
 663                         ctl_free_io(io);
 664                 } else {
 665                         ccb->ccb_h.status |= CAM_SIM_QUEUED;
 666                 }
 667                 break;
 668         }
 669         case XPT_ABORT: {
 670                 union ctl_io *io;
 671                 union ccb *abort_ccb;
 672
 673                 abort_ccb = ccb->cab.abort_ccb;
 674
 675                 if (abort_ccb->ccb_h.func_code != XPT_SCSI_IO) {
 676                         ccb->ccb_h.status = CAM_REQ_INVALID;
 677                         xpt_done(ccb);
 678                 }
 679
 680                 /*
 681                  * If we aren't online, there are no devices to talk to.
 682                  */
 683                 if (softc->online == 0) {
 684                         ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 685                         xpt_done(ccb);
 686                         return;
 687                 }
 688
 689                 io = ctl_alloc_io(softc->fe.ctl_pool_ref);
 690                 if (io == NULL) {
 691                         ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
 692                         xpt_freeze_devq(ccb->ccb_h.path, 1);
 693                         xpt_done(ccb);
 694                         return;
 695                 }
 696
 697                 ctl_zero_io(io);
 698                 /* Save pointers on both sides */
 699                 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
 700                 ccb->ccb_h.io_ptr = io;
 701
 702                 io->io_hdr.io_type = CTL_IO_TASK;
 703                 io->io_hdr.nexus.initid.id = 1;
 704                 io->io_hdr.nexus.targ_port = softc->fe.targ_port;
 705                 io->io_hdr.nexus.targ_target.id = ccb->ccb_h.target_id;
 706                 io->io_hdr.nexus.targ_lun = ccb->ccb_h.target_lun;
 707                 io->taskio.task_action = CTL_TASK_ABORT_TASK;
 708                 io->taskio.tag_num = abort_ccb->csio.tag_id;
 709                 switch (abort_ccb->csio.tag_action) {
 710                 case CAM_TAG_ACTION_NONE:
 711                         io->taskio.tag_type = CTL_TAG_UNTAGGED;
 712                         break;
 713                 case MSG_SIMPLE_TASK:
 714                         io->taskio.tag_type = CTL_TAG_SIMPLE;
 715                         break;
 716                 case MSG_HEAD_OF_QUEUE_TASK:
 717                         io->taskio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
 718                         break;
 719                 case MSG_ORDERED_TASK:
 720                         io->taskio.tag_type = CTL_TAG_ORDERED;
 721                         break;
 722                 case MSG_ACA_TASK:
 723                         io->taskio.tag_type = CTL_TAG_ACA;
 724                         break;
 725                 default:
 726                         io->taskio.tag_type = CTL_TAG_UNTAGGED;
 727                         printf("%s: unhandled tag type %#x!!\n", __func__,
 728                                abort_ccb->csio.tag_action);
 729                         break;
 730                 }
 731                 err = ctl_queue(io);
 732                 if (err != CTL_RETVAL_COMPLETE) {
 733                         printf("%s func %d: error %d returned by "
 734                                "ctl_queue()!\n", __func__,
 735                                ccb->ccb_h.func_code, err);
 736                         ctl_free_io(io);
 737                 }
 738                 break;
 739         }
 740         case XPT_GET_TRAN_SETTINGS: {
 741                 struct ccb_trans_settings *cts;
 742                 struct ccb_trans_settings_scsi *scsi;
 743                 struct ccb_trans_settings_fc *fc;
 744
 745                 cts = &ccb->cts;
 746                 scsi = &cts->proto_specific.scsi;
 747                 fc = &cts->xport_specific.fc;
 748
 749
 750                 cts->protocol = PROTO_SCSI;
 751                 cts->protocol_version = SCSI_REV_SPC2;
 752                 cts->transport = XPORT_FC;
 753                 cts->transport_version = 0;
 754
 755                 scsi->valid = CTS_SCSI_VALID_TQ;
 756                 scsi->flags = CTS_SCSI_FLAGS_TAG_ENB;
 757                 fc->valid = CTS_FC_VALID_SPEED;
 758                 fc->bitrate = 800000;
 759                 fc->wwnn = softc->wwnn;
 760                 fc->wwpn = softc->wwpn;
 761                 fc->port = softc->fe.targ_port;
 762                 fc->valid |= CTS_FC_VALID_WWNN | CTS_FC_VALID_WWPN |
 763                         CTS_FC_VALID_PORT;
 764                 ccb->ccb_h.status = CAM_REQ_CMP;
 765                 break;
 766         }
 767         case XPT_SET_TRAN_SETTINGS:
 768                 /* XXX KDM should we actually do something here? */
 769                 ccb->ccb_h.status = CAM_REQ_CMP;
 770                 break;
 771         case XPT_RESET_BUS:
 772         case XPT_RESET_DEV: {
 773                 union ctl_io *io;
 774
 775                 /*
 776                  * If we aren't online, there are no devices to talk to.
 777                  */
 778                 if (softc->online == 0) {
 779                         ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 780                         xpt_done(ccb);
 781                         return;
 782                 }
 783
 784                 io = ctl_alloc_io(softc->fe.ctl_pool_ref);
 785                 if (io == NULL) {
 786                         ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
 787                         xpt_freeze_devq(ccb->ccb_h.path, 1);
 788                         xpt_done(ccb);
 789                         return;
 790                 }
 791
 792                 ctl_zero_io(io);
 793                 /* Save pointers on both sides */
 794                 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
 795                 ccb->ccb_h.io_ptr = io;
 796
 797                 io->io_hdr.io_type = CTL_IO_TASK;
 798                 io->io_hdr.nexus.initid.id = 0;
 799                 io->io_hdr.nexus.targ_port = softc->fe.targ_port;
 800                 io->io_hdr.nexus.targ_target.id = ccb->ccb_h.target_id;
 801                 io->io_hdr.nexus.targ_lun = ccb->ccb_h.target_lun;
 802                 if (ccb->ccb_h.func_code == XPT_RESET_BUS)
 803                         io->taskio.task_action = CTL_TASK_BUS_RESET;
 804                 else
 805                         io->taskio.task_action = CTL_TASK_LUN_RESET;
 806
 807                 err = ctl_queue(io);
 808                 if (err != CTL_RETVAL_COMPLETE) {
 809                         printf("%s func %d: error %d returned by "
 810                               "ctl_queue()!\n", __func__,
 811                               ccb->ccb_h.func_code, err);
 812                         ctl_free_io(io);
 813                 }
 814                 break;
 815         }
 816         case XPT_CALC_GEOMETRY:
 817                 cam_calc_geometry(&ccb->ccg, 1);
 818                 xpt_done(ccb);
 819                 break;
 820         case XPT_PATH_INQ: {
 821                 struct ccb_pathinq *cpi;
 822
 823                 cpi = &ccb->cpi;
 824
 825                 cpi->version_num = 0;
 826                 cpi->hba_inquiry = PI_TAG_ABLE;
 827                 cpi->target_sprt = 0;
 828                 cpi->hba_misc = 0;
 829                 cpi->hba_eng_cnt = 0;
 830                 cpi->max_target = 1;
 831                 cpi->max_lun = 1024;
 832                 /* Do we really have a limit? */
 833                 cpi->maxio = 1024 * 1024;
 834                 cpi->async_flags = 0;
 835                 cpi->hpath_id = 0;
 836                 cpi->initiator_id = 0;
 837
 838                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
 839                 strncpy(cpi->hba_vid, "FreeBSD", HBA_IDLEN);
 840                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
 841                 cpi->unit_number = 0;
 842                 cpi->bus_id = 0;
 843                 cpi->base_transfer_speed = 800000;
 844                 cpi->protocol = PROTO_SCSI;
 845                 cpi->protocol_version = SCSI_REV_SPC2;
 846                 /*
 847                  * Pretend to be Fibre Channel.
 848                  */
 849                 cpi->transport = XPORT_FC;
 850                 cpi->transport_version = 0;
 851                 cpi->xport_specific.fc.wwnn = softc->wwnn;
 852                 cpi->xport_specific.fc.wwpn = softc->wwpn;
 853                 cpi->xport_specific.fc.port = softc->fe.targ_port;
 854                 cpi->xport_specific.fc.bitrate = 8 * 1000 * 1000;
 855                 cpi->ccb_h.status = CAM_REQ_CMP;
 856                 break;
 857         }
 858         default:
 859                 ccb->ccb_h.status = CAM_PROVIDE_FAIL;
 860                 printf("%s: unsupported CCB type %#x\n", __func__,
 861                        ccb->ccb_h.func_code);
 862                 xpt_done(ccb);
 863                 break;
 864         }
 865 }
 866
 867 static void
 868 cfcs_async(void *callback_arg, uint32_t code, struct cam_path *path, void *arg)
 869 {
 870
 871 }