sys/cam/ctl/ctl_frontend_cam_sim.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2009 Silicon Graphics International Corp.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions, and the following disclaimer,
  12  *    without modification.
  13  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  14  *    substantially similar to the "NO WARRANTY" disclaimer below
  15  *    ("Disclaimer") and any redistribution must be conditioned upon
  16  *    including a substantially similar Disclaimer requirement for further
  17  *    binary redistribution.
  18  *
  19  * NO WARRANTY
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  28  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  29  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGES.
  31  *
  32  * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_frontend_cam_sim.c#4 $
  33  */
  34 /*
  35  * CTL frontend to CAM SIM interface.  This allows access to CTL LUNs via
  36  * the da(4) and pass(4) drivers from inside the system.
  37  *
  38  * Author: Ken Merry <ken@FreeBSD.org>
  39  */
  40
  41 #include <sys/cdefs.h>
  42 __FBSDID("$FreeBSD$");
  43
  44 #include <sys/param.h>
  45 #include <sys/systm.h>
  46 #include <sys/kernel.h>
  47 #include <sys/types.h>
  48 #include <sys/malloc.h>
  49 #include <sys/bus.h>
  50 #include <sys/sysctl.h>
  51 #include <machine/atomic.h>
  52 #include <machine/bus.h>
  53 #include <sys/sbuf.h>
  54
  55 #include <cam/cam.h>
  56 #include <cam/cam_ccb.h>
  57 #include <cam/cam_sim.h>
  58 #include <cam/cam_xpt_sim.h>
  59 #include <cam/cam_xpt.h>
  60 #include <cam/cam_periph.h>
  61 #include <cam/scsi/scsi_all.h>
  62 #include <cam/scsi/scsi_message.h>
  63 #include <cam/ctl/ctl_io.h>
  64 #include <cam/ctl/ctl.h>
  65 #include <cam/ctl/ctl_frontend.h>
  66 #include <cam/ctl/ctl_debug.h>
  67
  68 #define io_ptr          spriv_ptr1
  69
  70 struct cfcs_io {
  71         union ccb *ccb;
  72 };
  73
  74 struct cfcs_softc {
  75         struct ctl_port port;
  76         char port_name[32];
  77         struct cam_sim *sim;
  78         struct cam_devq *devq;
  79         struct cam_path *path;
  80         uint64_t wwnn;
  81         uint64_t wwpn;
  82         uint32_t cur_tag_num;
  83         int online;
  84 };
  85
  86 /*
  87  * We can't handle CCBs with these flags.  For the most part, we just don't
  88  * handle physical addresses yet.  That would require mapping things in
  89  * order to do the copy.
  90  */
  91 #define CFCS_BAD_CCB_FLAGS (CAM_DATA_ISPHYS | CAM_MSG_BUF_PHYS |        \
  92         CAM_SNS_BUF_PHYS | CAM_CDB_PHYS | CAM_SENSE_PTR |               \
  93         CAM_SENSE_PHYS)
  94
  95 static int cfcs_init(void);
  96 static int cfcs_shutdown(void);
  97 static void cfcs_poll(struct cam_sim *sim);
  98 static void cfcs_online(void *arg);
  99 static void cfcs_offline(void *arg);
 100 static void cfcs_datamove(union ctl_io *io);
 101 static void cfcs_done(union ctl_io *io);
 102 void cfcs_action(struct cam_sim *sim, union ccb *ccb);
 103
 104 struct cfcs_softc cfcs_softc;
 105 /*
 106  * This is primarily intended to allow for error injection to test the CAM
 107  * sense data and sense residual handling code.  This sets the maximum
 108  * amount of SCSI sense data that we will report to CAM.
 109  */
 110 static int cfcs_max_sense = sizeof(struct scsi_sense_data);
 111
 112 SYSCTL_NODE(_kern_cam, OID_AUTO, ctl2cam, CTLFLAG_RD, 0,
 113             "CAM Target Layer SIM frontend");
 114 SYSCTL_INT(_kern_cam_ctl2cam, OID_AUTO, max_sense, CTLFLAG_RW,
 115            &cfcs_max_sense, 0, "Maximum sense data size");
 116
 117 static struct ctl_frontend cfcs_frontend =
 118 {
 119         .name = "camsim",
 120         .init = cfcs_init,
 121         .shutdown = cfcs_shutdown,
 122 };
 123 CTL_FRONTEND_DECLARE(ctlcfcs, cfcs_frontend);
 124
 125 static int
 126 cfcs_init(void)
 127 {
 128         struct cfcs_softc *softc;
 129         struct ctl_port *port;
 130         int retval;
 131
 132         softc = &cfcs_softc;
 133         bzero(softc, sizeof(*softc));
 134         port = &softc->port;
 135
 136         port->frontend = &cfcs_frontend;
 137         port->port_type = CTL_PORT_INTERNAL;
 138         /* XXX KDM what should the real number be here? */
 139         port->num_requested_ctl_io = 4096;
 140         snprintf(softc->port_name, sizeof(softc->port_name), "camsim");
 141         port->port_name = softc->port_name;
 142         port->port_online = cfcs_online;
 143         port->port_offline = cfcs_offline;
 144         port->onoff_arg = softc;
 145         port->fe_datamove = cfcs_datamove;
 146         port->fe_done = cfcs_done;
 147         port->targ_port = -1;
 148
 149         retval = ctl_port_register(port);
 150         if (retval != 0) {
 151                 printf("%s: ctl_port_register() failed with error %d!\n",
 152                        __func__, retval);
 153                 return (retval);
 154         }
 155
 156         /*
 157          * If the CTL frontend didn't tell us what our WWNN/WWPN is, go
 158          * ahead and set something random.
 159          */
 160         if (port->wwnn == 0) {
 161                 uint64_t random_bits;
 162
 163                 arc4rand(&random_bits, sizeof(random_bits), 0);
 164                 softc->wwnn = (random_bits & 0x0000000fffffff00ULL) |
 165                         /* Company ID */ 0x5000000000000000ULL |
 166                         /* NL-Port */    0x0300;
 167                 softc->wwpn = softc->wwnn + port->targ_port + 1;
 168                 ctl_port_set_wwns(port, true, softc->wwnn, true, softc->wwpn);
 169         } else {
 170                 softc->wwnn = port->wwnn;
 171                 softc->wwpn = port->wwpn;
 172         }
 173
 174         softc->devq = cam_simq_alloc(port->num_requested_ctl_io);
 175         if (softc->devq == NULL) {
 176                 printf("%s: error allocating devq\n", __func__);
 177                 retval = ENOMEM;
 178                 goto bailout;
 179         }
 180
 181         softc->sim = cam_sim_alloc(cfcs_action, cfcs_poll, softc->port_name,
 182                                    softc, /*unit*/ 0, NULL, 1,
 183                                    port->num_requested_ctl_io, softc->devq);
 184         if (softc->sim == NULL) {
 185                 printf("%s: error allocating SIM\n", __func__);
 186                 retval = ENOMEM;
 187                 goto bailout;
 188         }
 189
 190         if (xpt_bus_register(softc->sim, NULL, 0) != CAM_SUCCESS) {
 191                 printf("%s: error registering SIM\n", __func__);
 192                 retval = ENOMEM;
 193                 goto bailout;
 194         }
 195
 196         if (xpt_create_path(&softc->path, /*periph*/NULL,
 197                             cam_sim_path(softc->sim),
 198                             CAM_TARGET_WILDCARD,
 199                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 200                 printf("%s: error creating path\n", __func__);
 201                 xpt_bus_deregister(cam_sim_path(softc->sim));
 202                 retval = EINVAL;
 203                 goto bailout;
 204         }
 205
 206         return (retval);
 207
 208 bailout:
 209         if (softc->sim)
 210                 cam_sim_free(softc->sim, /*free_devq*/ TRUE);
 211         else if (softc->devq)
 212                 cam_simq_free(softc->devq);
 213         return (retval);
 214 }
 215
 216 static int
 217 cfcs_shutdown(void)
 218 {
 219         struct cfcs_softc *softc = &cfcs_softc;
 220         struct ctl_port *port = &softc->port;
 221         int error;
 222
 223         ctl_port_offline(port);
 224
 225         xpt_free_path(softc->path);
 226         xpt_bus_deregister(cam_sim_path(softc->sim));
 227         cam_sim_free(softc->sim, /*free_devq*/ TRUE);
 228
 229         if ((error = ctl_port_deregister(port)) != 0)
 230                 printf("%s: cam_sim port deregistration failed\n", __func__);
 231         return (error);
 232 }
 233
 234 static void
 235 cfcs_poll(struct cam_sim *sim)
 236 {
 237
 238 }
 239
 240 static void
 241 cfcs_onoffline(void *arg, int online)
 242 {
 243         struct cfcs_softc *softc = (struct cfcs_softc *)arg;
 244         union ccb *ccb;
 245
 246         softc->online = online;
 247
 248         ccb = xpt_alloc_ccb_nowait();
 249         if (ccb == NULL) {
 250                 printf("%s: unable to allocate CCB for rescan\n", __func__);
 251                 return;
 252         }
 253
 254         if (xpt_create_path(&ccb->ccb_h.path, NULL,
 255                             cam_sim_path(softc->sim), CAM_TARGET_WILDCARD,
 256                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 257                 printf("%s: can't allocate path for rescan\n", __func__);
 258                 xpt_free_ccb(ccb);
 259                 return;
 260         }
 261         xpt_rescan(ccb);
 262 }
 263
 264 static void
 265 cfcs_online(void *arg)
 266 {
 267         cfcs_onoffline(arg, /*online*/ 1);
 268 }
 269
 270 static void
 271 cfcs_offline(void *arg)
 272 {
 273         cfcs_onoffline(arg, /*online*/ 0);
 274 }
 275
 276 /*
 277  * This function is very similar to ctl_ioctl_do_datamove().  Is there a
 278  * way to combine the functionality?
 279  *
 280  * XXX KDM may need to move this into a thread.  We're doing a bcopy in the
 281  * caller's context, which will usually be the backend.  That may not be a
 282  * good thing.
 283  */
 284 static void
 285 cfcs_datamove(union ctl_io *io)
 286 {
 287         union ccb *ccb;
 288         bus_dma_segment_t cam_sg_entry, *cam_sglist;
 289         struct ctl_sg_entry ctl_sg_entry, *ctl_sglist;
 290         int cam_sg_count, ctl_sg_count, cam_sg_start;
 291         int cam_sg_offset;
 292         int len_to_copy;
 293         int ctl_watermark, cam_watermark;
 294         int i, j;
 295
 296         ccb = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
 297
 298         /*
 299          * Note that we have a check in cfcs_action() to make sure that any
 300          * CCBs with "bad" flags are returned with CAM_REQ_INVALID.  This
 301          * is just to make sure no one removes that check without updating
 302          * this code to provide the additional functionality necessary to
 303          * support those modes of operation.
 304          */
 305         KASSERT(((ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS) == 0), ("invalid "
 306                   "CAM flags %#x", (ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS)));
 307
 308         /*
 309          * Simplify things on both sides by putting single buffers into a
 310          * single entry S/G list.
 311          */
 312         switch ((ccb->ccb_h.flags & CAM_DATA_MASK)) {
 313         case CAM_DATA_SG: {
 314                 int len_seen;
 315
 316                 cam_sglist = (bus_dma_segment_t *)ccb->csio.data_ptr;
 317                 cam_sg_count = ccb->csio.sglist_cnt;
 318                 cam_sg_start = cam_sg_count;
 319                 cam_sg_offset = 0;
 320
 321                 for (i = 0, len_seen = 0; i < cam_sg_count; i++) {
 322                         if ((len_seen + cam_sglist[i].ds_len) >=
 323                              io->scsiio.kern_rel_offset) {
 324                                 cam_sg_start = i;
 325                                 cam_sg_offset = io->scsiio.kern_rel_offset -
 326                                         len_seen;
 327                                 break;
 328                         }
 329                         len_seen += cam_sglist[i].ds_len;
 330                 }
 331                 break;
 332         }
 333         case CAM_DATA_VADDR:
 334                 cam_sglist = &cam_sg_entry;
 335                 cam_sglist[0].ds_len = ccb->csio.dxfer_len;
 336                 cam_sglist[0].ds_addr = (bus_addr_t)(uintptr_t)ccb->csio.data_ptr;
 337                 cam_sg_count = 1;
 338                 cam_sg_start = 0;
 339                 cam_sg_offset = io->scsiio.kern_rel_offset;
 340                 break;
 341         default:
 342                 panic("Invalid CAM flags %#x", ccb->ccb_h.flags);
 343         }
 344
 345         if (io->scsiio.kern_sg_entries > 0) {
 346                 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr;
 347                 ctl_sg_count = io->scsiio.kern_sg_entries;
 348         } else {
 349                 ctl_sglist = &ctl_sg_entry;
 350                 ctl_sglist->addr = io->scsiio.kern_data_ptr;
 351                 ctl_sglist->len = io->scsiio.kern_data_len;
 352                 ctl_sg_count = 1;
 353         }
 354
 355         ctl_watermark = 0;
 356         cam_watermark = cam_sg_offset;
 357         for (i = cam_sg_start, j = 0;
 358              i < cam_sg_count && j < ctl_sg_count;) {
 359                 uint8_t *cam_ptr, *ctl_ptr;
 360
 361                 len_to_copy = MIN(cam_sglist[i].ds_len - cam_watermark,
 362                                   ctl_sglist[j].len - ctl_watermark);
 363
 364                 cam_ptr = (uint8_t *)(uintptr_t)cam_sglist[i].ds_addr;
 365                 cam_ptr = cam_ptr + cam_watermark;
 366                 if (io->io_hdr.flags & CTL_FLAG_BUS_ADDR) {
 367                         /*
 368                          * XXX KDM fix this!
 369                          */
 370                         panic("need to implement bus address support");
 371 #if 0
 372                         kern_ptr = bus_to_virt(kern_sglist[j].addr);
 373 #endif
 374                 } else
 375                         ctl_ptr = (uint8_t *)ctl_sglist[j].addr;
 376                 ctl_ptr = ctl_ptr + ctl_watermark;
 377
 378                 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) ==
 379                      CTL_FLAG_DATA_IN) {
 380                         CTL_DEBUG_PRINT(("%s: copying %d bytes to CAM\n",
 381                                          __func__, len_to_copy));
 382                         CTL_DEBUG_PRINT(("%s: from %p to %p\n", ctl_ptr,
 383                                          __func__, cam_ptr));
 384                         bcopy(ctl_ptr, cam_ptr, len_to_copy);
 385                 } else {
 386                         CTL_DEBUG_PRINT(("%s: copying %d bytes from CAM\n",
 387                                          __func__, len_to_copy));
 388                         CTL_DEBUG_PRINT(("%s: from %p to %p\n", cam_ptr,
 389                                          __func__, ctl_ptr));
 390                         bcopy(cam_ptr, ctl_ptr, len_to_copy);
 391                 }
 392
 393                 io->scsiio.ext_data_filled += len_to_copy;
 394                 io->scsiio.kern_data_resid -= len_to_copy;
 395
 396                 cam_watermark += len_to_copy;
 397                 if (cam_sglist[i].ds_len == cam_watermark) {
 398                         i++;
 399                         cam_watermark = 0;
 400                 }
 401
 402                 ctl_watermark += len_to_copy;
 403                 if (ctl_sglist[j].len == ctl_watermark) {
 404                         j++;
 405                         ctl_watermark = 0;
 406                 }
 407         }
 408
 409         if ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_SUCCESS) {
 410                 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL;
 411                 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT;
 412                 ccb->csio.resid = ccb->csio.dxfer_len -
 413                     io->scsiio.ext_data_filled;
 414                 ccb->ccb_h.status &= ~CAM_STATUS_MASK;
 415                 ccb->ccb_h.status |= CAM_REQ_CMP;
 416                 xpt_done(ccb);
 417         }
 418
 419         io->scsiio.be_move_done(io);
 420 }
 421
 422 static void
 423 cfcs_done(union ctl_io *io)
 424 {
 425         union ccb *ccb;
 426
 427         ccb = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
 428         if (ccb == NULL) {
 429                 ctl_free_io(io);
 430                 return;
 431         }
 432
 433         /*
 434          * At this point we should have status.  If we don't, that's a bug.
 435          */
 436         KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE),
 437                 ("invalid CTL status %#x", io->io_hdr.status));
 438
 439         /*
 440          * Translate CTL status to CAM status.
 441          */
 442         if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
 443                 ccb->csio.resid = ccb->csio.dxfer_len -
 444                     io->scsiio.ext_data_filled;
 445         }
 446         ccb->ccb_h.status &= ~CAM_STATUS_MASK;
 447         switch (io->io_hdr.status & CTL_STATUS_MASK) {
 448         case CTL_SUCCESS:
 449                 ccb->ccb_h.status |= CAM_REQ_CMP;
 450                 break;
 451         case CTL_SCSI_ERROR:
 452                 ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID;
 453                 ccb->csio.scsi_status = io->scsiio.scsi_status;
 454                 bcopy(&io->scsiio.sense_data, &ccb->csio.sense_data,
 455                       min(io->scsiio.sense_len, ccb->csio.sense_len));
 456                 if (ccb->csio.sense_len > io->scsiio.sense_len)
 457                         ccb->csio.sense_resid = ccb->csio.sense_len -
 458                                                 io->scsiio.sense_len;
 459                 else
 460                         ccb->csio.sense_resid = 0;
 461                 if ((ccb->csio.sense_len - ccb->csio.sense_resid) >
 462                      cfcs_max_sense) {
 463                         ccb->csio.sense_resid = ccb->csio.sense_len -
 464                                                 cfcs_max_sense;
 465                 }
 466                 break;
 467         case CTL_CMD_ABORTED:
 468                 ccb->ccb_h.status |= CAM_REQ_ABORTED;
 469                 break;
 470         case CTL_ERROR:
 471         default:
 472                 ccb->ccb_h.status |= CAM_REQ_CMP_ERR;
 473                 break;
 474         }
 475         ctl_free_io(io);
 476         if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP &&
 477             (ccb->ccb_h.status & CAM_DEV_QFRZN) == 0) {
 478                 xpt_freeze_devq(ccb->ccb_h.path, 1);
 479                 ccb->ccb_h.status |= CAM_DEV_QFRZN;
 480         }
 481         xpt_done(ccb);
 482 }
 483
 484 void
 485 cfcs_action(struct cam_sim *sim, union ccb *ccb)
 486 {
 487         struct cfcs_softc *softc;
 488         int err;
 489
 490         softc = (struct cfcs_softc *)cam_sim_softc(sim);
 491
 492         switch (ccb->ccb_h.func_code) {
 493         case XPT_SCSI_IO: {
 494                 union ctl_io *io;
 495                 struct ccb_scsiio *csio;
 496
 497                 csio = &ccb->csio;
 498
 499                 /*
 500                  * Catch CCB flags, like physical address flags, that
 501                  * indicate situations we currently can't handle.
 502                  */
 503                 if (ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS) {
 504                         ccb->ccb_h.status = CAM_REQ_INVALID;
 505                         printf("%s: bad CCB flags %#x (all flags %#x)\n",
 506                                __func__, ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS,
 507                                ccb->ccb_h.flags);
 508                         xpt_done(ccb);
 509                         return;
 510                 }
 511
 512                 /*
 513                  * If we aren't online, there are no devices to see.
 514                  */
 515                 if (softc->online == 0) {
 516                         ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 517                         xpt_done(ccb);
 518                         return;
 519                 }
 520
 521                 io = ctl_alloc_io_nowait(softc->port.ctl_pool_ref);
 522                 if (io == NULL) {
 523                         printf("%s: can't allocate ctl_io\n", __func__);
 524                         ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
 525                         xpt_freeze_devq(ccb->ccb_h.path, 1);
 526                         xpt_done(ccb);
 527                         return;
 528                 }
 529                 ctl_zero_io(io);
 530                 /* Save pointers on both sides */
 531                 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
 532                 ccb->ccb_h.io_ptr = io;
 533
 534                 /*
 535                  * Only SCSI I/O comes down this path, resets, etc. come
 536                  * down via the XPT_RESET_BUS/LUN CCBs below.
 537                  */
 538                 io->io_hdr.io_type = CTL_IO_SCSI;
 539                 io->io_hdr.nexus.initid = 1;
 540                 io->io_hdr.nexus.targ_port = softc->port.targ_port;
 541                 io->io_hdr.nexus.targ_lun = ctl_decode_lun(
 542                     CAM_EXTLUN_BYTE_SWIZZLE(ccb->ccb_h.target_lun));
 543                 /*
 544                  * This tag scheme isn't the best, since we could in theory
 545                  * have a very long-lived I/O and tag collision, especially
 546                  * in a high I/O environment.  But it should work well
 547                  * enough for now.  Since we're using unsigned ints,
 548                  * they'll just wrap around.
 549                  */
 550                 io->scsiio.tag_num = atomic_fetchadd_32(&softc->cur_tag_num, 1);
 551                 csio->tag_id = io->scsiio.tag_num;
 552                 switch (csio->tag_action) {
 553                 case CAM_TAG_ACTION_NONE:
 554                         io->scsiio.tag_type = CTL_TAG_UNTAGGED;
 555                         break;
 556                 case MSG_SIMPLE_TASK:
 557                         io->scsiio.tag_type = CTL_TAG_SIMPLE;
 558                         break;
 559                 case MSG_HEAD_OF_QUEUE_TASK:
 560                         io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
 561                         break;
 562                 case MSG_ORDERED_TASK:
 563                         io->scsiio.tag_type = CTL_TAG_ORDERED;
 564                         break;
 565                 case MSG_ACA_TASK:
 566                         io->scsiio.tag_type = CTL_TAG_ACA;
 567                         break;
 568                 default:
 569                         io->scsiio.tag_type = CTL_TAG_UNTAGGED;
 570                         printf("%s: unhandled tag type %#x!!\n", __func__,
 571                                csio->tag_action);
 572                         break;
 573                 }
 574                 if (csio->cdb_len > sizeof(io->scsiio.cdb)) {
 575                         printf("%s: WARNING: CDB len %d > ctl_io space %zd\n",
 576                                __func__, csio->cdb_len, sizeof(io->scsiio.cdb));
 577                 }
 578                 io->scsiio.cdb_len = min(csio->cdb_len, sizeof(io->scsiio.cdb));
 579                 bcopy(scsiio_cdb_ptr(csio), io->scsiio.cdb, io->scsiio.cdb_len);
 580
 581                 ccb->ccb_h.status |= CAM_SIM_QUEUED;
 582                 err = ctl_queue(io);
 583                 if (err != CTL_RETVAL_COMPLETE) {
 584                         printf("%s: func %d: error %d returned by "
 585                                "ctl_queue()!\n", __func__,
 586                                ccb->ccb_h.func_code, err);
 587                         ctl_free_io(io);
 588                         ccb->ccb_h.status = CAM_REQ_INVALID;
 589                         xpt_done(ccb);
 590                         return;
 591                 }
 592                 break;
 593         }
 594         case XPT_ABORT: {
 595                 union ctl_io *io;
 596                 union ccb *abort_ccb;
 597
 598                 abort_ccb = ccb->cab.abort_ccb;
 599
 600                 if (abort_ccb->ccb_h.func_code != XPT_SCSI_IO) {
 601                         ccb->ccb_h.status = CAM_REQ_INVALID;
 602                         xpt_done(ccb);
 603                 }
 604
 605                 /*
 606                  * If we aren't online, there are no devices to talk to.
 607                  */
 608                 if (softc->online == 0) {
 609                         ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 610                         xpt_done(ccb);
 611                         return;
 612                 }
 613
 614                 io = ctl_alloc_io_nowait(softc->port.ctl_pool_ref);
 615                 if (io == NULL) {
 616                         ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
 617                         xpt_freeze_devq(ccb->ccb_h.path, 1);
 618                         xpt_done(ccb);
 619                         return;
 620                 }
 621
 622                 ctl_zero_io(io);
 623                 /* Save pointers on both sides */
 624                 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
 625                 ccb->ccb_h.io_ptr = io;
 626
 627                 io->io_hdr.io_type = CTL_IO_TASK;
 628                 io->io_hdr.nexus.initid = 1;
 629                 io->io_hdr.nexus.targ_port = softc->port.targ_port;
 630                 io->io_hdr.nexus.targ_lun = ctl_decode_lun(
 631                     CAM_EXTLUN_BYTE_SWIZZLE(ccb->ccb_h.target_lun));
 632                 io->taskio.task_action = CTL_TASK_ABORT_TASK;
 633                 io->taskio.tag_num = abort_ccb->csio.tag_id;
 634                 switch (abort_ccb->csio.tag_action) {
 635                 case CAM_TAG_ACTION_NONE:
 636                         io->taskio.tag_type = CTL_TAG_UNTAGGED;
 637                         break;
 638                 case MSG_SIMPLE_TASK:
 639                         io->taskio.tag_type = CTL_TAG_SIMPLE;
 640                         break;
 641                 case MSG_HEAD_OF_QUEUE_TASK:
 642                         io->taskio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
 643                         break;
 644                 case MSG_ORDERED_TASK:
 645                         io->taskio.tag_type = CTL_TAG_ORDERED;
 646                         break;
 647                 case MSG_ACA_TASK:
 648                         io->taskio.tag_type = CTL_TAG_ACA;
 649                         break;
 650                 default:
 651                         io->taskio.tag_type = CTL_TAG_UNTAGGED;
 652                         printf("%s: unhandled tag type %#x!!\n", __func__,
 653                                abort_ccb->csio.tag_action);
 654                         break;
 655                 }
 656                 err = ctl_queue(io);
 657                 if (err != CTL_RETVAL_COMPLETE) {
 658                         printf("%s func %d: error %d returned by "
 659                                "ctl_queue()!\n", __func__,
 660                                ccb->ccb_h.func_code, err);
 661                         ctl_free_io(io);
 662                 }
 663                 break;
 664         }
 665         case XPT_GET_TRAN_SETTINGS: {
 666                 struct ccb_trans_settings *cts;
 667                 struct ccb_trans_settings_scsi *scsi;
 668                 struct ccb_trans_settings_fc *fc;
 669
 670                 cts = &ccb->cts;
 671                 scsi = &cts->proto_specific.scsi;
 672                 fc = &cts->xport_specific.fc;
 673
 674
 675                 cts->protocol = PROTO_SCSI;
 676                 cts->protocol_version = SCSI_REV_SPC2;
 677                 cts->transport = XPORT_FC;
 678                 cts->transport_version = 0;
 679
 680                 scsi->valid = CTS_SCSI_VALID_TQ;
 681                 scsi->flags = CTS_SCSI_FLAGS_TAG_ENB;
 682                 fc->valid = CTS_FC_VALID_SPEED;
 683                 fc->bitrate = 800000;
 684                 fc->wwnn = softc->wwnn;
 685                 fc->wwpn = softc->wwpn;
 686                 fc->port = softc->port.targ_port;
 687                 fc->valid |= CTS_FC_VALID_WWNN | CTS_FC_VALID_WWPN |
 688                         CTS_FC_VALID_PORT;
 689                 ccb->ccb_h.status = CAM_REQ_CMP;
 690                 break;
 691         }
 692         case XPT_SET_TRAN_SETTINGS:
 693                 /* XXX KDM should we actually do something here? */
 694                 ccb->ccb_h.status = CAM_REQ_CMP;
 695                 break;
 696         case XPT_RESET_BUS:
 697         case XPT_RESET_DEV: {
 698                 union ctl_io *io;
 699
 700                 /*
 701                  * If we aren't online, there are no devices to talk to.
 702                  */
 703                 if (softc->online == 0) {
 704                         ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 705                         xpt_done(ccb);
 706                         return;
 707                 }
 708
 709                 io = ctl_alloc_io_nowait(softc->port.ctl_pool_ref);
 710                 if (io == NULL) {
 711                         ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
 712                         xpt_freeze_devq(ccb->ccb_h.path, 1);
 713                         xpt_done(ccb);
 714                         return;
 715                 }
 716
 717                 ctl_zero_io(io);
 718                 /* Save pointers on both sides */
 719                 if (ccb->ccb_h.func_code == XPT_RESET_DEV)
 720                         io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
 721                 ccb->ccb_h.io_ptr = io;
 722
 723                 io->io_hdr.io_type = CTL_IO_TASK;
 724                 io->io_hdr.nexus.initid = 1;
 725                 io->io_hdr.nexus.targ_port = softc->port.targ_port;
 726                 io->io_hdr.nexus.targ_lun = ctl_decode_lun(
 727                     CAM_EXTLUN_BYTE_SWIZZLE(ccb->ccb_h.target_lun));
 728                 if (ccb->ccb_h.func_code == XPT_RESET_BUS)
 729                         io->taskio.task_action = CTL_TASK_BUS_RESET;
 730                 else
 731                         io->taskio.task_action = CTL_TASK_LUN_RESET;
 732
 733                 err = ctl_queue(io);
 734                 if (err != CTL_RETVAL_COMPLETE) {
 735                         printf("%s func %d: error %d returned by "
 736                               "ctl_queue()!\n", __func__,
 737                               ccb->ccb_h.func_code, err);
 738                         ctl_free_io(io);
 739                 }
 740                 break;
 741         }
 742         case XPT_CALC_GEOMETRY:
 743                 cam_calc_geometry(&ccb->ccg, 1);
 744                 xpt_done(ccb);
 745                 break;
 746         case XPT_PATH_INQ: {
 747                 struct ccb_pathinq *cpi;
 748
 749                 cpi = &ccb->cpi;
 750
 751                 cpi->version_num = 0;
 752                 cpi->hba_inquiry = PI_TAG_ABLE;
 753                 cpi->target_sprt = 0;
 754                 cpi->hba_misc = PIM_EXTLUNS;
 755                 cpi->hba_eng_cnt = 0;
 756                 cpi->max_target = 0;
 757                 cpi->max_lun = 1024;
 758                 /* Do we really have a limit? */
 759                 cpi->maxio = 1024 * 1024;
 760                 cpi->async_flags = 0;
 761                 cpi->hpath_id = 0;
 762                 cpi->initiator_id = 1;
 763
 764                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
 765                 strlcpy(cpi->hba_vid, "FreeBSD", HBA_IDLEN);
 766                 strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
 767                 cpi->unit_number = 0;
 768                 cpi->bus_id = 0;
 769                 cpi->base_transfer_speed = 800000;
 770                 cpi->protocol = PROTO_SCSI;
 771                 cpi->protocol_version = SCSI_REV_SPC2;
 772                 /*
 773                  * Pretend to be Fibre Channel.
 774                  */
 775                 cpi->transport = XPORT_FC;
 776                 cpi->transport_version = 0;
 777                 cpi->xport_specific.fc.wwnn = softc->wwnn;
 778                 cpi->xport_specific.fc.wwpn = softc->wwpn;
 779                 cpi->xport_specific.fc.port = softc->port.targ_port;
 780                 cpi->xport_specific.fc.bitrate = 8 * 1000 * 1000;
 781                 cpi->ccb_h.status = CAM_REQ_CMP;
 782                 break;
 783         }
 784         default:
 785                 ccb->ccb_h.status = CAM_PROVIDE_FAIL;
 786                 printf("%s: unsupported CCB type %#x\n", __func__,
 787                        ccb->ccb_h.func_code);
 788                 xpt_done(ccb);
 789                 break;
 790         }
 791 }