sys/cam/ctl/ctl_frontend_cam_sim.c

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