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