sys/cam/ctl/ctl_frontend_cam_sim.c

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