sys/cam/ctl/ctl_frontend_cam_sim.c

   1 /*-
   2  * Copyright (c) 2009 Silicon Graphics International Corp.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions, and the following disclaimer,
  10  *    without modification.
  11  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  12  *    substantially similar to the "NO WARRANTY" disclaimer below
  13  *    ("Disclaimer") and any redistribution must be conditioned upon
  14  *    including a substantially similar Disclaimer requirement for further
  15  *    binary redistribution.
  16  *
  17  * NO WARRANTY
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  26  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  27  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGES.
  29  *
  30  * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_frontend_cam_sim.c#4 $
  31  */
  32 /*
  33  * CTL frontend to CAM SIM interface.  This allows access to CTL LUNs via
  34  * the da(4) and pass(4) drivers from inside the system.
  35  *
  36  * Author: Ken Merry <ken@FreeBSD.org>
  37  */
  38
  39 #include <sys/cdefs.h>
  40 __FBSDID("$FreeBSD$");
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/kernel.h>
  45 #include <sys/types.h>
  46 #include <sys/malloc.h>
  47 #include <sys/lock.h>
  48 #include <sys/mutex.h>
  49 #include <sys/condvar.h>
  50 #include <sys/queue.h>
  51 #include <sys/bus.h>
  52 #include <sys/sysctl.h>
  53 #include <machine/bus.h>
  54 #include <sys/sbuf.h>
  55
  56 #include <cam/cam.h>
  57 #include <cam/cam_ccb.h>
  58 #include <cam/cam_sim.h>
  59 #include <cam/cam_xpt_sim.h>
  60 #include <cam/cam_xpt.h>
  61 #include <cam/cam_periph.h>
  62 #include <cam/scsi/scsi_all.h>
  63 #include <cam/scsi/scsi_message.h>
  64 #include <cam/ctl/ctl_io.h>
  65 #include <cam/ctl/ctl.h>
  66 #include <cam/ctl/ctl_frontend.h>
  67 #include <cam/ctl/ctl_frontend_internal.h>
  68 #include <cam/ctl/ctl_debug.h>
  69
  70 #define io_ptr          spriv_ptr1
  71
  72 struct cfcs_io {
  73         union ccb *ccb;
  74 };
  75
  76 struct cfcs_softc {
  77         struct ctl_frontend fe;
  78         char port_name[32];
  79         struct cam_sim *sim;
  80         struct cam_devq *devq;
  81         struct cam_path *path;
  82         struct mtx lock;
  83         char lock_desc[32];
  84         uint64_t wwnn;
  85         uint64_t wwpn;
  86         uint32_t cur_tag_num;
  87         int online;
  88 };
  89
  90 /*
  91  * We can't handle CCBs with these flags.  For the most part, we just don't
  92  * handle physical addresses yet.  That would require mapping things in
  93  * order to do the copy.
  94  */
  95 #define CFCS_BAD_CCB_FLAGS (CAM_DATA_ISPHYS | CAM_MSG_BUF_PHYS |        \
  96         CAM_SNS_BUF_PHYS | CAM_CDB_PHYS | CAM_SENSE_PTR |               \
  97         CAM_SENSE_PHYS)
  98
  99 int cfcs_init(void);
 100 void cfcs_shutdown(void);
 101 static void cfcs_poll(struct cam_sim *sim);
 102 static void cfcs_online(void *arg);
 103 static void cfcs_offline(void *arg);
 104 static int cfcs_targ_enable(void *arg, struct ctl_id targ_id);
 105 static int cfcs_targ_disable(void *arg, struct ctl_id targ_id);
 106 static int cfcs_lun_enable(void *arg, struct ctl_id target_id, int lun_id);
 107 static int cfcs_lun_disable(void *arg, struct ctl_id target_id, int lun_id);
 108 static void cfcs_datamove(union ctl_io *io);
 109 static void cfcs_done(union ctl_io *io);
 110 void cfcs_action(struct cam_sim *sim, union ccb *ccb);
 111 static void cfcs_async(void *callback_arg, uint32_t code,
 112                        struct cam_path *path, void *arg);
 113
 114 struct cfcs_softc cfcs_softc;
 115 /*
 116  * This is primarly intended to allow for error injection to test the CAM
 117  * sense data and sense residual handling code.  This sets the maximum
 118  * amount of SCSI sense data that we will report to CAM.
 119  */
 120 static int cfcs_max_sense = sizeof(struct scsi_sense_data);
 121 extern int ctl_disable;
 122
 123 SYSCTL_NODE(_kern_cam, OID_AUTO, ctl2cam, CTLFLAG_RD, 0,
 124             "CAM Target Layer SIM frontend");
 125 SYSCTL_INT(_kern_cam_ctl2cam, OID_AUTO, max_sense, CTLFLAG_RW,
 126            &cfcs_max_sense, 0, "Maximum sense data size");
 127
 128 static int cfcs_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 129
 130 static moduledata_t cfcs_moduledata = {
 131         "ctlcfcs",
 132         cfcs_module_event_handler,
 133         NULL
 134 };
 135
 136 DECLARE_MODULE(ctlcfcs, cfcs_moduledata, SI_SUB_CONFIGURE, SI_ORDER_FOURTH);
 137 MODULE_VERSION(ctlcfcs, 1);
 138 MODULE_DEPEND(ctlcfi, ctl, 1, 1, 1);
 139 MODULE_DEPEND(ctlcfi, cam, 1, 1, 1);
 140
 141 int
 142 cfcs_init(void)
 143 {
 144         struct cfcs_softc *softc;
 145         struct ccb_setasync csa;
 146         struct ctl_frontend *fe;
 147 #ifdef NEEDTOPORT
 148         char wwnn[8];
 149 #endif
 150         int retval;
 151
 152         /* Don't continue if CTL is disabled */
 153         if (ctl_disable != 0)
 154                 return (0);
 155
 156         softc = &cfcs_softc;
 157         retval = 0;
 158         bzero(softc, sizeof(*softc));
 159         sprintf(softc->lock_desc, "ctl2cam");
 160         mtx_init(&softc->lock, softc->lock_desc, NULL, MTX_DEF);
 161         fe = &softc->fe;
 162
 163         fe->port_type = CTL_PORT_INTERNAL;
 164         /* XXX KDM what should the real number be here? */
 165         fe->num_requested_ctl_io = 4096;
 166         snprintf(softc->port_name, sizeof(softc->port_name), "ctl2cam");
 167         fe->port_name = softc->port_name;
 168         fe->port_online = cfcs_online;
 169         fe->port_offline = cfcs_offline;
 170         fe->onoff_arg = softc;
 171         fe->targ_enable = cfcs_targ_enable;
 172         fe->targ_disable = cfcs_targ_disable;
 173         fe->lun_enable = cfcs_lun_enable;
 174         fe->lun_disable = cfcs_lun_disable;
 175         fe->targ_lun_arg = softc;
 176         fe->fe_datamove = cfcs_datamove;
 177         fe->fe_done = cfcs_done;
 178
 179         /* XXX KDM what should we report here? */
 180         /* XXX These should probably be fetched from CTL. */
 181         fe->max_targets = 1;
 182         fe->max_target_id = 15;
 183
 184         retval = ctl_frontend_register(fe, /*master_SC*/ 1);
 185         if (retval != 0) {
 186                 printf("%s: ctl_frontend_register() failed with error %d!\n",
 187                        __func__, retval);
 188                 mtx_destroy(&softc->lock);
 189                 return (retval);
 190         }
 191
 192         /*
 193          * Get the WWNN out of the database, and create a WWPN as well.
 194          */
 195 #ifdef NEEDTOPORT
 196         ddb_GetWWNN((char *)wwnn);
 197         softc->wwnn = be64dec(wwnn);
 198         softc->wwpn = softc->wwnn + (softc->fe.targ_port & 0xff);
 199 #endif
 200
 201         /*
 202          * If the CTL frontend didn't tell us what our WWNN/WWPN is, go
 203          * ahead and set something random.
 204          */
 205         if (fe->wwnn == 0) {
 206                 uint64_t random_bits;
 207
 208                 arc4rand(&random_bits, sizeof(random_bits), 0);
 209                 softc->wwnn = (random_bits & 0x0000000fffffff00ULL) |
 210                         /* Company ID */ 0x5000000000000000ULL |
 211                         /* NL-Port */    0x0300;
 212                 softc->wwpn = softc->wwnn + fe->targ_port + 1;
 213                 fe->wwnn = softc->wwnn;
 214                 fe->wwpn = softc->wwpn;
 215         } else {
 216                 softc->wwnn = fe->wwnn;
 217                 softc->wwpn = fe->wwpn;
 218         }
 219
 220         mtx_lock(&softc->lock);
 221         softc->devq = cam_simq_alloc(fe->num_requested_ctl_io);
 222         if (softc->devq == NULL) {
 223                 printf("%s: error allocating devq\n", __func__);
 224                 retval = ENOMEM;
 225                 goto bailout;
 226         }
 227
 228         softc->sim = cam_sim_alloc(cfcs_action, cfcs_poll, softc->port_name,
 229                                    softc, /*unit*/ 0, &softc->lock, 1,
 230                                    fe->num_requested_ctl_io, softc->devq);
 231         if (softc->sim == NULL) {
 232                 printf("%s: error allocating SIM\n", __func__);
 233                 retval = ENOMEM;
 234                 goto bailout;
 235         }
 236
 237         if (xpt_bus_register(softc->sim, NULL, 0) != CAM_SUCCESS) {
 238                 printf("%s: error registering SIM\n", __func__);
 239                 retval = ENOMEM;
 240                 goto bailout;
 241         }
 242
 243         if (xpt_create_path(&softc->path, /*periph*/NULL,
 244                             cam_sim_path(softc->sim),
 245                             CAM_TARGET_WILDCARD,
 246                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 247                 printf("%s: error creating path\n", __func__);
 248                 xpt_bus_deregister(cam_sim_path(softc->sim));
 249                 retval = EINVAL;
 250                 goto bailout;
 251         }
 252
 253         xpt_setup_ccb(&csa.ccb_h, softc->path, CAM_PRIORITY_NONE);
 254         csa.ccb_h.func_code = XPT_SASYNC_CB;
 255         csa.event_enable = AC_LOST_DEVICE;
 256         csa.callback = cfcs_async;
 257         csa.callback_arg = softc->sim;
 258         xpt_action((union ccb *)&csa);
 259
 260         mtx_unlock(&softc->lock);
 261
 262         return (retval);
 263
 264 bailout:
 265         if (softc->sim)
 266                 cam_sim_free(softc->sim, /*free_devq*/ TRUE);
 267         else if (softc->devq)
 268                 cam_simq_free(softc->devq);
 269         mtx_unlock(&softc->lock);
 270         mtx_destroy(&softc->lock);
 271
 272         return (retval);
 273 }
 274
 275 static void
 276 cfcs_poll(struct cam_sim *sim)
 277 {
 278
 279 }
 280
 281 void
 282 cfcs_shutdown(void)
 283 {
 284
 285 }
 286
 287 static int
 288 cfcs_module_event_handler(module_t mod, int what, void *arg)
 289 {
 290
 291         switch (what) {
 292         case MOD_LOAD:
 293                 return (cfcs_init());
 294         case MOD_UNLOAD:
 295                 return (EBUSY);
 296         default:
 297                 return (EOPNOTSUPP);
 298         }
 299 }
 300
 301 static void
 302 cfcs_onoffline(void *arg, int online)
 303 {
 304         struct cfcs_softc *softc;
 305         union ccb *ccb;
 306
 307         softc = (struct cfcs_softc *)arg;
 308
 309         mtx_lock(&softc->lock);
 310         softc->online = online;
 311
 312         ccb = xpt_alloc_ccb_nowait();
 313         if (ccb == NULL) {
 314                 printf("%s: unable to allocate CCB for rescan\n", __func__);
 315                 goto bailout;
 316         }
 317
 318         if (xpt_create_path(&ccb->ccb_h.path, NULL,
 319                             cam_sim_path(softc->sim), CAM_TARGET_WILDCARD,
 320                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 321                 printf("%s: can't allocate path for rescan\n", __func__);
 322                 xpt_free_ccb(ccb);
 323                 goto bailout;
 324         }
 325         xpt_rescan(ccb);
 326
 327 bailout:
 328         mtx_unlock(&softc->lock);
 329 }
 330
 331 static void
 332 cfcs_online(void *arg)
 333 {
 334         cfcs_onoffline(arg, /*online*/ 1);
 335 }
 336
 337 static void
 338 cfcs_offline(void *arg)
 339 {
 340         cfcs_onoffline(arg, /*online*/ 0);
 341 }
 342
 343 static int
 344 cfcs_targ_enable(void *arg, struct ctl_id targ_id)
 345 {
 346         return (0);
 347 }
 348
 349 static int
 350 cfcs_targ_disable(void *arg, struct ctl_id targ_id)
 351 {
 352         return (0);
 353 }
 354
 355 static int
 356 cfcs_lun_enable(void *arg, struct ctl_id target_id, int lun_id)
 357 {
 358         return (0);
 359 }
 360 static int
 361 cfcs_lun_disable(void *arg, struct ctl_id target_id, int lun_id)
 362 {
 363         return (0);
 364 }
 365
 366 /*
 367  * This function is very similar to ctl_ioctl_do_datamove().  Is there a
 368  * way to combine the functionality?
 369  *
 370  * XXX KDM may need to move this into a thread.  We're doing a bcopy in the
 371  * caller's context, which will usually be the backend.  That may not be a
 372  * good thing.
 373  */
 374 static void
 375 cfcs_datamove(union ctl_io *io)
 376 {
 377         union ccb *ccb;
 378         bus_dma_segment_t cam_sg_entry, *cam_sglist;
 379         struct ctl_sg_entry ctl_sg_entry, *ctl_sglist;
 380         int cam_sg_count, ctl_sg_count, cam_sg_start;
 381         int cam_sg_offset;
 382         int len_to_copy, len_copied;
 383         int ctl_watermark, cam_watermark;
 384         int i, j;
 385
 386
 387         cam_sg_offset = 0;
 388         cam_sg_start = 0;
 389
 390         ccb = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
 391
 392         /*
 393          * Note that we have a check in cfcs_action() to make sure that any
 394          * CCBs with "bad" flags are returned with CAM_REQ_INVALID.  This
 395          * is just to make sure no one removes that check without updating
 396          * this code to provide the additional functionality necessary to
 397          * support those modes of operation.
 398          */
 399         KASSERT(((ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS) == 0), ("invalid "
 400                   "CAM flags %#x", (ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS)));
 401
 402         /*
 403          * Simplify things on both sides by putting single buffers into a
 404          * single entry S/G list.
 405          */
 406         switch ((ccb->ccb_h.flags & CAM_DATA_MASK)) {
 407         case CAM_DATA_SG: {
 408                 int len_seen;
 409
 410                 cam_sglist = (bus_dma_segment_t *)ccb->csio.data_ptr;
 411                 cam_sg_count = ccb->csio.sglist_cnt;
 412
 413                 for (i = 0, len_seen = 0; i < cam_sg_count; i++) {
 414                         if ((len_seen + cam_sglist[i].ds_len) >=
 415                              io->scsiio.kern_rel_offset) {
 416                                 cam_sg_start = i;
 417                                 cam_sg_offset = io->scsiio.kern_rel_offset -
 418                                         len_seen;
 419                                 break;
 420                         }
 421                         len_seen += cam_sglist[i].ds_len;
 422                 }
 423                 break;
 424         }
 425         case CAM_DATA_VADDR:
 426                 cam_sglist = &cam_sg_entry;
 427                 cam_sglist[0].ds_len = ccb->csio.dxfer_len;
 428                 cam_sglist[0].ds_addr = (bus_addr_t)ccb->csio.data_ptr;
 429                 cam_sg_count = 1;
 430                 cam_sg_start = 0;
 431                 cam_sg_offset = io->scsiio.kern_rel_offset;
 432                 break;
 433         default:
 434                 panic("Invalid CAM flags %#x", ccb->ccb_h.flags);
 435         }
 436
 437         if (io->scsiio.kern_sg_entries > 0) {
 438                 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr;
 439                 ctl_sg_count = io->scsiio.kern_sg_entries;
 440         } else {
 441                 ctl_sglist = &ctl_sg_entry;
 442                 ctl_sglist->addr = io->scsiio.kern_data_ptr;
 443                 ctl_sglist->len = io->scsiio.kern_data_len;
 444                 ctl_sg_count = 1;
 445         }
 446
 447         ctl_watermark = 0;
 448         cam_watermark = cam_sg_offset;
 449         len_copied = 0;
 450         for (i = cam_sg_start, j = 0;
 451              i < cam_sg_count && j < ctl_sg_count;) {
 452                 uint8_t *cam_ptr, *ctl_ptr;
 453
 454                 len_to_copy = ctl_min(cam_sglist[i].ds_len - cam_watermark,
 455                                       ctl_sglist[j].len - ctl_watermark);
 456
 457                 cam_ptr = (uint8_t *)cam_sglist[i].ds_addr;
 458                 cam_ptr = cam_ptr + cam_watermark;
 459                 if (io->io_hdr.flags & CTL_FLAG_BUS_ADDR) {
 460                         /*
 461                          * XXX KDM fix this!
 462                          */
 463                         panic("need to implement bus address support");
 464 #if 0
 465                         kern_ptr = bus_to_virt(kern_sglist[j].addr);
 466 #endif
 467                 } else
 468                         ctl_ptr = (uint8_t *)ctl_sglist[j].addr;
 469                 ctl_ptr = ctl_ptr + ctl_watermark;
 470
 471                 ctl_watermark += len_to_copy;
 472                 cam_watermark += len_to_copy;
 473
 474                 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) ==
 475                      CTL_FLAG_DATA_IN) {
 476                         CTL_DEBUG_PRINT(("%s: copying %d bytes to CAM\n",
 477                                          __func__, len_to_copy));
 478                         CTL_DEBUG_PRINT(("%s: from %p to %p\n", ctl_ptr,
 479                                          __func__, cam_ptr));
 480                         bcopy(ctl_ptr, cam_ptr, len_to_copy);
 481                 } else {
 482                         CTL_DEBUG_PRINT(("%s: copying %d bytes from CAM\n",
 483                                          __func__, len_to_copy));
 484                         CTL_DEBUG_PRINT(("%s: from %p to %p\n", cam_ptr,
 485                                          __func__, ctl_ptr));
 486                         bcopy(cam_ptr, ctl_ptr, len_to_copy);
 487                 }
 488
 489                 len_copied += len_to_copy;
 490
 491                 if (cam_sglist[i].ds_len == cam_watermark) {
 492                         i++;
 493                         cam_watermark = 0;
 494                 }
 495
 496                 if (ctl_sglist[j].len == ctl_watermark) {
 497                         j++;
 498                         ctl_watermark = 0;
 499                 }
 500         }
 501
 502         io->scsiio.ext_data_filled += len_copied;
 503
 504         io->scsiio.be_move_done(io);
 505 }
 506
 507 static void
 508 cfcs_done(union ctl_io *io)
 509 {
 510         union ccb *ccb;
 511         struct cfcs_softc *softc;
 512         struct cam_sim *sim;
 513
 514         ccb = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
 515         if (ccb == NULL) {
 516                 ctl_free_io(io);
 517                 return;
 518         }
 519
 520         sim = xpt_path_sim(ccb->ccb_h.path);
 521         softc = (struct cfcs_softc *)cam_sim_softc(sim);
 522
 523         /*
 524          * At this point we should have status.  If we don't, that's a bug.
 525          */
 526         KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE),
 527                 ("invalid CTL status %#x", io->io_hdr.status));
 528
 529         /*
 530          * Translate CTL status to CAM status.
 531          */
 532         switch (io->io_hdr.status & CTL_STATUS_MASK) {
 533         case CTL_SUCCESS:
 534                 ccb->ccb_h.status = CAM_REQ_CMP;
 535                 break;
 536         case CTL_SCSI_ERROR:
 537                 ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID;
 538                 ccb->csio.scsi_status = io->scsiio.scsi_status;
 539                 bcopy(&io->scsiio.sense_data, &ccb->csio.sense_data,
 540                       min(io->scsiio.sense_len, ccb->csio.sense_len));
 541                 if (ccb->csio.sense_len > io->scsiio.sense_len)
 542                         ccb->csio.sense_resid = ccb->csio.sense_len -
 543                                                 io->scsiio.sense_len;
 544                 else
 545                         ccb->csio.sense_resid = 0;
 546                 if ((ccb->csio.sense_len - ccb->csio.sense_resid) >
 547                      cfcs_max_sense) {
 548                         ccb->csio.sense_resid = ccb->csio.sense_len -
 549                                                 cfcs_max_sense;
 550                 }
 551                 break;
 552         case CTL_CMD_ABORTED:
 553                 ccb->ccb_h.status = CAM_REQ_ABORTED;
 554                 break;
 555         case CTL_ERROR:
 556         default:
 557                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 558                 break;
 559         }
 560
 561         mtx_lock(sim->mtx);
 562         xpt_done(ccb);
 563         mtx_unlock(sim->mtx);
 564
 565         ctl_free_io(io);
 566 }
 567
 568 void
 569 cfcs_action(struct cam_sim *sim, union ccb *ccb)
 570 {
 571         struct cfcs_softc *softc;
 572         int err;
 573
 574         softc = (struct cfcs_softc *)cam_sim_softc(sim);
 575         mtx_assert(&softc->lock, MA_OWNED);
 576
 577         switch (ccb->ccb_h.func_code) {
 578         case XPT_SCSI_IO: {
 579                 union ctl_io *io;
 580                 struct ccb_scsiio *csio;
 581
 582                 csio = &ccb->csio;
 583
 584                 /*
 585                  * Catch CCB flags, like physical address flags, that
 586                  * indicate situations we currently can't handle.
 587                  */
 588                 if (ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS) {
 589                         ccb->ccb_h.status = CAM_REQ_INVALID;
 590                         printf("%s: bad CCB flags %#x (all flags %#x)\n",
 591                                __func__, ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS,
 592                                ccb->ccb_h.flags);
 593                         xpt_done(ccb);
 594                         return;
 595                 }
 596
 597                 /*
 598                  * If we aren't online, there are no devices to see.
 599                  */
 600                 if (softc->online == 0) {
 601                         ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 602                         xpt_done(ccb);
 603                         return;
 604                 }
 605
 606                 io = ctl_alloc_io(softc->fe.ctl_pool_ref);
 607                 if (io == NULL) {
 608                         printf("%s: can't allocate ctl_io\n", __func__);
 609                         ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
 610                         xpt_freeze_devq(ccb->ccb_h.path, 1);
 611                         xpt_done(ccb);
 612                         return;
 613                 }
 614                 ctl_zero_io(io);
 615                 /* Save pointers on both sides */
 616                 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
 617                 ccb->ccb_h.io_ptr = io;
 618
 619                 /*
 620                  * Only SCSI I/O comes down this path, resets, etc. come
 621                  * down via the XPT_RESET_BUS/LUN CCBs below.
 622                  */
 623                 io->io_hdr.io_type = CTL_IO_SCSI;
 624                 io->io_hdr.nexus.initid.id = 1;
 625                 io->io_hdr.nexus.targ_port = softc->fe.targ_port;
 626                 /*
 627                  * XXX KDM how do we handle target IDs?
 628                  */
 629                 io->io_hdr.nexus.targ_target.id = ccb->ccb_h.target_id;
 630                 io->io_hdr.nexus.targ_lun = ccb->ccb_h.target_lun;
 631                 /*
 632                  * This tag scheme isn't the best, since we could in theory
 633                  * have a very long-lived I/O and tag collision, especially
 634                  * in a high I/O environment.  But it should work well
 635                  * enough for now.  Since we're using unsigned ints,
 636                  * they'll just wrap around.
 637                  */
 638                 io->scsiio.tag_num = softc->cur_tag_num++;
 639                 csio->tag_id = io->scsiio.tag_num;
 640                 switch (csio->tag_action) {
 641                 case CAM_TAG_ACTION_NONE:
 642                         io->scsiio.tag_type = CTL_TAG_UNTAGGED;
 643                         break;
 644                 case MSG_SIMPLE_TASK:
 645                         io->scsiio.tag_type = CTL_TAG_SIMPLE;
 646                         break;
 647                 case MSG_HEAD_OF_QUEUE_TASK:
 648                         io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
 649                         break;
 650                 case MSG_ORDERED_TASK:
 651                         io->scsiio.tag_type = CTL_TAG_ORDERED;
 652                         break;
 653                 case MSG_ACA_TASK:
 654                         io->scsiio.tag_type = CTL_TAG_ACA;
 655                         break;
 656                 default:
 657                         io->scsiio.tag_type = CTL_TAG_UNTAGGED;
 658                         printf("%s: unhandled tag type %#x!!\n", __func__,
 659                                csio->tag_action);
 660                         break;
 661                 }
 662                 if (csio->cdb_len > sizeof(io->scsiio.cdb)) {
 663                         printf("%s: WARNING: CDB len %d > ctl_io space %zd\n",
 664                                __func__, csio->cdb_len, sizeof(io->scsiio.cdb));
 665                 }
 666                 io->scsiio.cdb_len = min(csio->cdb_len, sizeof(io->scsiio.cdb));
 667                 bcopy(csio->cdb_io.cdb_bytes, io->scsiio.cdb,
 668                       io->scsiio.cdb_len);
 669
 670                 err = ctl_queue(io);
 671                 if (err != CTL_RETVAL_COMPLETE) {
 672                         printf("%s: func %d: error %d returned by "
 673                                "ctl_queue()!\n", __func__,
 674                                ccb->ccb_h.func_code, err);
 675                         ctl_free_io(io);
 676                 } else {
 677                         ccb->ccb_h.status |= CAM_SIM_QUEUED;
 678                 }
 679                 break;
 680         }
 681         case XPT_ABORT: {
 682                 union ctl_io *io;
 683                 union ccb *abort_ccb;
 684
 685                 abort_ccb = ccb->cab.abort_ccb;
 686
 687                 if (abort_ccb->ccb_h.func_code != XPT_SCSI_IO) {
 688                         ccb->ccb_h.status = CAM_REQ_INVALID;
 689                         xpt_done(ccb);
 690                 }
 691
 692                 /*
 693                  * If we aren't online, there are no devices to talk to.
 694                  */
 695                 if (softc->online == 0) {
 696                         ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 697                         xpt_done(ccb);
 698                         return;
 699                 }
 700
 701                 io = ctl_alloc_io(softc->fe.ctl_pool_ref);
 702                 if (io == NULL) {
 703                         ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
 704                         xpt_freeze_devq(ccb->ccb_h.path, 1);
 705                         xpt_done(ccb);
 706                         return;
 707                 }
 708
 709                 ctl_zero_io(io);
 710                 /* Save pointers on both sides */
 711                 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
 712                 ccb->ccb_h.io_ptr = io;
 713
 714                 io->io_hdr.io_type = CTL_IO_TASK;
 715                 io->io_hdr.nexus.initid.id = 1;
 716                 io->io_hdr.nexus.targ_port = softc->fe.targ_port;
 717                 io->io_hdr.nexus.targ_target.id = ccb->ccb_h.target_id;
 718                 io->io_hdr.nexus.targ_lun = ccb->ccb_h.target_lun;
 719                 io->taskio.task_action = CTL_TASK_ABORT_TASK;
 720                 io->taskio.tag_num = abort_ccb->csio.tag_id;
 721                 switch (abort_ccb->csio.tag_action) {
 722                 case CAM_TAG_ACTION_NONE:
 723                         io->taskio.tag_type = CTL_TAG_UNTAGGED;
 724                         break;
 725                 case MSG_SIMPLE_TASK:
 726                         io->taskio.tag_type = CTL_TAG_SIMPLE;
 727                         break;
 728                 case MSG_HEAD_OF_QUEUE_TASK:
 729                         io->taskio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
 730                         break;
 731                 case MSG_ORDERED_TASK:
 732                         io->taskio.tag_type = CTL_TAG_ORDERED;
 733                         break;
 734                 case MSG_ACA_TASK:
 735                         io->taskio.tag_type = CTL_TAG_ACA;
 736                         break;
 737                 default:
 738                         io->taskio.tag_type = CTL_TAG_UNTAGGED;
 739                         printf("%s: unhandled tag type %#x!!\n", __func__,
 740                                abort_ccb->csio.tag_action);
 741                         break;
 742                 }
 743                 err = ctl_queue(io);
 744                 if (err != CTL_RETVAL_COMPLETE) {
 745                         printf("%s func %d: error %d returned by "
 746                                "ctl_queue()!\n", __func__,
 747                                ccb->ccb_h.func_code, err);
 748                         ctl_free_io(io);
 749                 }
 750                 break;
 751         }
 752         case XPT_GET_TRAN_SETTINGS: {
 753                 struct ccb_trans_settings *cts;
 754                 struct ccb_trans_settings_scsi *scsi;
 755                 struct ccb_trans_settings_fc *fc;
 756
 757                 cts = &ccb->cts;
 758                 scsi = &cts->proto_specific.scsi;
 759                 fc = &cts->xport_specific.fc;
 760
 761
 762                 cts->protocol = PROTO_SCSI;
 763                 cts->protocol_version = SCSI_REV_SPC2;
 764                 cts->transport = XPORT_FC;
 765                 cts->transport_version = 0;
 766
 767                 scsi->valid = CTS_SCSI_VALID_TQ;
 768                 scsi->flags = CTS_SCSI_FLAGS_TAG_ENB;
 769                 fc->valid = CTS_FC_VALID_SPEED;
 770                 fc->bitrate = 800000;
 771                 fc->wwnn = softc->wwnn;
 772                 fc->wwpn = softc->wwpn;
 773                 fc->port = softc->fe.targ_port;
 774                 fc->valid |= CTS_FC_VALID_WWNN | CTS_FC_VALID_WWPN |
 775                         CTS_FC_VALID_PORT;
 776                 ccb->ccb_h.status = CAM_REQ_CMP;
 777                 break;
 778         }
 779         case XPT_SET_TRAN_SETTINGS:
 780                 /* XXX KDM should we actually do something here? */
 781                 ccb->ccb_h.status = CAM_REQ_CMP;
 782                 break;
 783         case XPT_RESET_BUS:
 784         case XPT_RESET_DEV: {
 785                 union ctl_io *io;
 786
 787                 /*
 788                  * If we aren't online, there are no devices to talk to.
 789                  */
 790                 if (softc->online == 0) {
 791                         ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 792                         xpt_done(ccb);
 793                         return;
 794                 }
 795
 796                 io = ctl_alloc_io(softc->fe.ctl_pool_ref);
 797                 if (io == NULL) {
 798                         ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
 799                         xpt_freeze_devq(ccb->ccb_h.path, 1);
 800                         xpt_done(ccb);
 801                         return;
 802                 }
 803
 804                 ctl_zero_io(io);
 805                 /* Save pointers on both sides */
 806                 if (ccb->ccb_h.func_code == XPT_RESET_DEV)
 807                         io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
 808                 ccb->ccb_h.io_ptr = io;
 809
 810                 io->io_hdr.io_type = CTL_IO_TASK;
 811                 io->io_hdr.nexus.initid.id = 0;
 812                 io->io_hdr.nexus.targ_port = softc->fe.targ_port;
 813                 io->io_hdr.nexus.targ_target.id = ccb->ccb_h.target_id;
 814                 io->io_hdr.nexus.targ_lun = ccb->ccb_h.target_lun;
 815                 if (ccb->ccb_h.func_code == XPT_RESET_BUS)
 816                         io->taskio.task_action = CTL_TASK_BUS_RESET;
 817                 else
 818                         io->taskio.task_action = CTL_TASK_LUN_RESET;
 819
 820                 err = ctl_queue(io);
 821                 if (err != CTL_RETVAL_COMPLETE) {
 822                         printf("%s func %d: error %d returned by "
 823                               "ctl_queue()!\n", __func__,
 824                               ccb->ccb_h.func_code, err);
 825                         ctl_free_io(io);
 826                 }
 827                 break;
 828         }
 829         case XPT_CALC_GEOMETRY:
 830                 cam_calc_geometry(&ccb->ccg, 1);
 831                 xpt_done(ccb);
 832                 break;
 833         case XPT_PATH_INQ: {
 834                 struct ccb_pathinq *cpi;
 835
 836                 cpi = &ccb->cpi;
 837
 838                 cpi->version_num = 0;
 839                 cpi->hba_inquiry = PI_TAG_ABLE;
 840                 cpi->target_sprt = 0;
 841                 cpi->hba_misc = 0;
 842                 cpi->hba_eng_cnt = 0;
 843                 cpi->max_target = 1;
 844                 cpi->max_lun = 1024;
 845                 /* Do we really have a limit? */
 846                 cpi->maxio = 1024 * 1024;
 847                 cpi->async_flags = 0;
 848                 cpi->hpath_id = 0;
 849                 cpi->initiator_id = 0;
 850
 851                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
 852                 strncpy(cpi->hba_vid, "FreeBSD", HBA_IDLEN);
 853                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
 854                 cpi->unit_number = 0;
 855                 cpi->bus_id = 0;
 856                 cpi->base_transfer_speed = 800000;
 857                 cpi->protocol = PROTO_SCSI;
 858                 cpi->protocol_version = SCSI_REV_SPC2;
 859                 /*
 860                  * Pretend to be Fibre Channel.
 861                  */
 862                 cpi->transport = XPORT_FC;
 863                 cpi->transport_version = 0;
 864                 cpi->xport_specific.fc.wwnn = softc->wwnn;
 865                 cpi->xport_specific.fc.wwpn = softc->wwpn;
 866                 cpi->xport_specific.fc.port = softc->fe.targ_port;
 867                 cpi->xport_specific.fc.bitrate = 8 * 1000 * 1000;
 868                 cpi->ccb_h.status = CAM_REQ_CMP;
 869                 break;
 870         }
 871         default:
 872                 ccb->ccb_h.status = CAM_PROVIDE_FAIL;
 873                 printf("%s: unsupported CCB type %#x\n", __func__,
 874                        ccb->ccb_h.func_code);
 875                 xpt_done(ccb);
 876                 break;
 877         }
 878 }
 879
 880 static void
 881 cfcs_async(void *callback_arg, uint32_t code, struct cam_path *path, void *arg)
 882 {
 883
 884 }