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 static int cfcs_init(void);
  98 static int cfcs_shutdown(void);
  99 static void cfcs_poll(struct cam_sim *sim);
 100 static void cfcs_online(void *arg);
 101 static void cfcs_offline(void *arg);
 102 static void cfcs_datamove(union ctl_io *io);
 103 static void cfcs_done(union ctl_io *io);
 104 void cfcs_action(struct cam_sim *sim, union ccb *ccb);
 105
 106 struct cfcs_softc cfcs_softc;
 107 /*
 108  * This is primarily intended to allow for error injection to test the CAM
 109  * sense data and sense residual handling code.  This sets the maximum
 110  * amount of SCSI sense data that we will report to CAM.
 111  */
 112 static int cfcs_max_sense = sizeof(struct scsi_sense_data);
 113
 114 SYSCTL_NODE(_kern_cam, OID_AUTO, ctl2cam, CTLFLAG_RD, 0,
 115             "CAM Target Layer SIM frontend");
 116 SYSCTL_INT(_kern_cam_ctl2cam, OID_AUTO, max_sense, CTLFLAG_RW,
 117            &cfcs_max_sense, 0, "Maximum sense data size");
 118
 119 static struct ctl_frontend cfcs_frontend =
 120 {
 121         .name = "camsim",
 122         .init = cfcs_init,
 123         .shutdown = cfcs_shutdown,
 124 };
 125 CTL_FRONTEND_DECLARE(ctlcfcs, cfcs_frontend);
 126
 127 static int
 128 cfcs_init(void)
 129 {
 130         struct cfcs_softc *softc;
 131         struct ctl_port *port;
 132         int retval;
 133
 134         softc = &cfcs_softc;
 135         bzero(softc, sizeof(*softc));
 136         mtx_init(&softc->lock, "ctl2cam", NULL, MTX_DEF);
 137         port = &softc->port;
 138
 139         port->frontend = &cfcs_frontend;
 140         port->port_type = CTL_PORT_INTERNAL;
 141         /* XXX KDM what should the real number be here? */
 142         port->num_requested_ctl_io = 4096;
 143         snprintf(softc->port_name, sizeof(softc->port_name), "camsim");
 144         port->port_name = softc->port_name;
 145         port->port_online = cfcs_online;
 146         port->port_offline = cfcs_offline;
 147         port->onoff_arg = softc;
 148         port->fe_datamove = cfcs_datamove;
 149         port->fe_done = cfcs_done;
 150         port->targ_port = -1;
 151
 152         retval = ctl_port_register(port);
 153         if (retval != 0) {
 154                 printf("%s: ctl_port_register() failed with error %d!\n",
 155                        __func__, retval);
 156                 mtx_destroy(&softc->lock);
 157                 return (retval);
 158         }
 159
 160         /*
 161          * If the CTL frontend didn't tell us what our WWNN/WWPN is, go
 162          * ahead and set something random.
 163          */
 164         if (port->wwnn == 0) {
 165                 uint64_t random_bits;
 166
 167                 arc4rand(&random_bits, sizeof(random_bits), 0);
 168                 softc->wwnn = (random_bits & 0x0000000fffffff00ULL) |
 169                         /* Company ID */ 0x5000000000000000ULL |
 170                         /* NL-Port */    0x0300;
 171                 softc->wwpn = softc->wwnn + port->targ_port + 1;
 172                 ctl_port_set_wwns(port, true, softc->wwnn, true, softc->wwpn);
 173         } else {
 174                 softc->wwnn = port->wwnn;
 175                 softc->wwpn = port->wwpn;
 176         }
 177
 178         mtx_lock(&softc->lock);
 179         softc->devq = cam_simq_alloc(port->num_requested_ctl_io);
 180         if (softc->devq == NULL) {
 181                 printf("%s: error allocating devq\n", __func__);
 182                 retval = ENOMEM;
 183                 goto bailout;
 184         }
 185
 186         softc->sim = cam_sim_alloc(cfcs_action, cfcs_poll, softc->port_name,
 187                                    softc, /*unit*/ 0, &softc->lock, 1,
 188                                    port->num_requested_ctl_io, softc->devq);
 189         if (softc->sim == NULL) {
 190                 printf("%s: error allocating SIM\n", __func__);
 191                 retval = ENOMEM;
 192                 goto bailout;
 193         }
 194
 195         if (xpt_bus_register(softc->sim, NULL, 0) != CAM_SUCCESS) {
 196                 printf("%s: error registering SIM\n", __func__);
 197                 retval = ENOMEM;
 198                 goto bailout;
 199         }
 200
 201         if (xpt_create_path(&softc->path, /*periph*/NULL,
 202                             cam_sim_path(softc->sim),
 203                             CAM_TARGET_WILDCARD,
 204                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 205                 printf("%s: error creating path\n", __func__);
 206                 xpt_bus_deregister(cam_sim_path(softc->sim));
 207                 retval = EINVAL;
 208                 goto bailout;
 209         }
 210
 211         mtx_unlock(&softc->lock);
 212
 213         return (retval);
 214
 215 bailout:
 216         if (softc->sim)
 217                 cam_sim_free(softc->sim, /*free_devq*/ TRUE);
 218         else if (softc->devq)
 219                 cam_simq_free(softc->devq);
 220         mtx_unlock(&softc->lock);
 221         mtx_destroy(&softc->lock);
 222
 223         return (retval);
 224 }
 225
 226 static int
 227 cfcs_shutdown(void)
 228 {
 229         struct cfcs_softc *softc = &cfcs_softc;
 230         struct ctl_port *port = &softc->port;
 231         int error;
 232
 233         ctl_port_offline(port);
 234
 235         mtx_lock(&softc->lock);
 236         xpt_free_path(softc->path);
 237         xpt_bus_deregister(cam_sim_path(softc->sim));
 238         cam_sim_free(softc->sim, /*free_devq*/ TRUE);
 239         mtx_unlock(&softc->lock);
 240         mtx_destroy(&softc->lock);
 241
 242         if ((error = ctl_port_deregister(port)) != 0)
 243                 printf("%s: cam_sim port deregistration failed\n", __func__);
 244         return (error);
 245 }
 246
 247 static void
 248 cfcs_poll(struct cam_sim *sim)
 249 {
 250
 251 }
 252
 253 static void
 254 cfcs_onoffline(void *arg, int online)
 255 {
 256         struct cfcs_softc *softc;
 257         union ccb *ccb;
 258
 259         softc = (struct cfcs_softc *)arg;
 260
 261         mtx_lock(&softc->lock);
 262         softc->online = online;
 263
 264         ccb = xpt_alloc_ccb_nowait();
 265         if (ccb == NULL) {
 266                 printf("%s: unable to allocate CCB for rescan\n", __func__);
 267                 goto bailout;
 268         }
 269
 270         if (xpt_create_path(&ccb->ccb_h.path, NULL,
 271                             cam_sim_path(softc->sim), CAM_TARGET_WILDCARD,
 272                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 273                 printf("%s: can't allocate path for rescan\n", __func__);
 274                 xpt_free_ccb(ccb);
 275                 goto bailout;
 276         }
 277         xpt_rescan(ccb);
 278
 279 bailout:
 280         mtx_unlock(&softc->lock);
 281 }
 282
 283 static void
 284 cfcs_online(void *arg)
 285 {
 286         cfcs_onoffline(arg, /*online*/ 1);
 287 }
 288
 289 static void
 290 cfcs_offline(void *arg)
 291 {
 292         cfcs_onoffline(arg, /*online*/ 0);
 293 }
 294
 295 /*
 296  * This function is very similar to ctl_ioctl_do_datamove().  Is there a
 297  * way to combine the functionality?
 298  *
 299  * XXX KDM may need to move this into a thread.  We're doing a bcopy in the
 300  * caller's context, which will usually be the backend.  That may not be a
 301  * good thing.
 302  */
 303 static void
 304 cfcs_datamove(union ctl_io *io)
 305 {
 306         union ccb *ccb;
 307         bus_dma_segment_t cam_sg_entry, *cam_sglist;
 308         struct ctl_sg_entry ctl_sg_entry, *ctl_sglist;
 309         int cam_sg_count, ctl_sg_count, cam_sg_start;
 310         int cam_sg_offset;
 311         int len_to_copy;
 312         int ctl_watermark, cam_watermark;
 313         int i, j;
 314
 315         ccb = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
 316
 317         /*
 318          * Note that we have a check in cfcs_action() to make sure that any
 319          * CCBs with "bad" flags are returned with CAM_REQ_INVALID.  This
 320          * is just to make sure no one removes that check without updating
 321          * this code to provide the additional functionality necessary to
 322          * support those modes of operation.
 323          */
 324         KASSERT(((ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS) == 0), ("invalid "
 325                   "CAM flags %#x", (ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS)));
 326
 327         /*
 328          * Simplify things on both sides by putting single buffers into a
 329          * single entry S/G list.
 330          */
 331         switch ((ccb->ccb_h.flags & CAM_DATA_MASK)) {
 332         case CAM_DATA_SG: {
 333                 int len_seen;
 334
 335                 cam_sglist = (bus_dma_segment_t *)ccb->csio.data_ptr;
 336                 cam_sg_count = ccb->csio.sglist_cnt;
 337                 cam_sg_start = cam_sg_count;
 338                 cam_sg_offset = 0;
 339
 340                 for (i = 0, len_seen = 0; i < cam_sg_count; i++) {
 341                         if ((len_seen + cam_sglist[i].ds_len) >=
 342                              io->scsiio.kern_rel_offset) {
 343                                 cam_sg_start = i;
 344                                 cam_sg_offset = io->scsiio.kern_rel_offset -
 345                                         len_seen;
 346                                 break;
 347                         }
 348                         len_seen += cam_sglist[i].ds_len;
 349                 }
 350                 break;
 351         }
 352         case CAM_DATA_VADDR:
 353                 cam_sglist = &cam_sg_entry;
 354                 cam_sglist[0].ds_len = ccb->csio.dxfer_len;
 355                 cam_sglist[0].ds_addr = (bus_addr_t)ccb->csio.data_ptr;
 356                 cam_sg_count = 1;
 357                 cam_sg_start = 0;
 358                 cam_sg_offset = io->scsiio.kern_rel_offset;
 359                 break;
 360         default:
 361                 panic("Invalid CAM flags %#x", ccb->ccb_h.flags);
 362         }
 363
 364         if (io->scsiio.kern_sg_entries > 0) {
 365                 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr;
 366                 ctl_sg_count = io->scsiio.kern_sg_entries;
 367         } else {
 368                 ctl_sglist = &ctl_sg_entry;
 369                 ctl_sglist->addr = io->scsiio.kern_data_ptr;
 370                 ctl_sglist->len = io->scsiio.kern_data_len;
 371                 ctl_sg_count = 1;
 372         }
 373
 374         ctl_watermark = 0;
 375         cam_watermark = cam_sg_offset;
 376         for (i = cam_sg_start, j = 0;
 377              i < cam_sg_count && j < ctl_sg_count;) {
 378                 uint8_t *cam_ptr, *ctl_ptr;
 379
 380                 len_to_copy = MIN(cam_sglist[i].ds_len - cam_watermark,
 381                                   ctl_sglist[j].len - ctl_watermark);
 382
 383                 cam_ptr = (uint8_t *)cam_sglist[i].ds_addr;
 384                 cam_ptr = cam_ptr + cam_watermark;
 385                 if (io->io_hdr.flags & CTL_FLAG_BUS_ADDR) {
 386                         /*
 387                          * XXX KDM fix this!
 388                          */
 389                         panic("need to implement bus address support");
 390 #if 0
 391                         kern_ptr = bus_to_virt(kern_sglist[j].addr);
 392 #endif
 393                 } else
 394                         ctl_ptr = (uint8_t *)ctl_sglist[j].addr;
 395                 ctl_ptr = ctl_ptr + ctl_watermark;
 396
 397                 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) ==
 398                      CTL_FLAG_DATA_IN) {
 399                         CTL_DEBUG_PRINT(("%s: copying %d bytes to CAM\n",
 400                                          __func__, len_to_copy));
 401                         CTL_DEBUG_PRINT(("%s: from %p to %p\n", ctl_ptr,
 402                                          __func__, cam_ptr));
 403                         bcopy(ctl_ptr, cam_ptr, len_to_copy);
 404                 } else {
 405                         CTL_DEBUG_PRINT(("%s: copying %d bytes from CAM\n",
 406                                          __func__, len_to_copy));
 407                         CTL_DEBUG_PRINT(("%s: from %p to %p\n", cam_ptr,
 408                                          __func__, ctl_ptr));
 409                         bcopy(cam_ptr, ctl_ptr, len_to_copy);
 410                 }
 411
 412                 io->scsiio.ext_data_filled += len_to_copy;
 413                 io->scsiio.kern_data_resid -= len_to_copy;
 414
 415                 cam_watermark += len_to_copy;
 416                 if (cam_sglist[i].ds_len == cam_watermark) {
 417                         i++;
 418                         cam_watermark = 0;
 419                 }
 420
 421                 ctl_watermark += len_to_copy;
 422                 if (ctl_sglist[j].len == ctl_watermark) {
 423                         j++;
 424                         ctl_watermark = 0;
 425                 }
 426         }
 427
 428         if ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_SUCCESS) {
 429                 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL;
 430                 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT;
 431                 ccb->csio.resid = ccb->csio.dxfer_len -
 432                     io->scsiio.ext_data_filled;
 433                 ccb->ccb_h.status &= ~CAM_STATUS_MASK;
 434                 ccb->ccb_h.status |= CAM_REQ_CMP;
 435                 xpt_done(ccb);
 436         }
 437
 438         io->scsiio.be_move_done(io);
 439 }
 440
 441 static void
 442 cfcs_done(union ctl_io *io)
 443 {
 444         union ccb *ccb;
 445
 446         ccb = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
 447         if (ccb == NULL) {
 448                 ctl_free_io(io);
 449                 return;
 450         }
 451
 452         /*
 453          * At this point we should have status.  If we don't, that's a bug.
 454          */
 455         KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE),
 456                 ("invalid CTL status %#x", io->io_hdr.status));
 457
 458         /*
 459          * Translate CTL status to CAM status.
 460          */
 461         if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
 462                 ccb->csio.resid = ccb->csio.dxfer_len -
 463                     io->scsiio.ext_data_filled;
 464         }
 465         ccb->ccb_h.status &= ~CAM_STATUS_MASK;
 466         switch (io->io_hdr.status & CTL_STATUS_MASK) {
 467         case CTL_SUCCESS:
 468                 ccb->ccb_h.status |= CAM_REQ_CMP;
 469                 break;
 470         case CTL_SCSI_ERROR:
 471                 ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID;
 472                 ccb->csio.scsi_status = io->scsiio.scsi_status;
 473                 bcopy(&io->scsiio.sense_data, &ccb->csio.sense_data,
 474                       min(io->scsiio.sense_len, ccb->csio.sense_len));
 475                 if (ccb->csio.sense_len > io->scsiio.sense_len)
 476                         ccb->csio.sense_resid = ccb->csio.sense_len -
 477                                                 io->scsiio.sense_len;
 478                 else
 479                         ccb->csio.sense_resid = 0;
 480                 if ((ccb->csio.sense_len - ccb->csio.sense_resid) >
 481                      cfcs_max_sense) {
 482                         ccb->csio.sense_resid = ccb->csio.sense_len -
 483                                                 cfcs_max_sense;
 484                 }
 485                 break;
 486         case CTL_CMD_ABORTED:
 487                 ccb->ccb_h.status |= CAM_REQ_ABORTED;
 488                 break;
 489         case CTL_ERROR:
 490         default:
 491                 ccb->ccb_h.status |= CAM_REQ_CMP_ERR;
 492                 break;
 493         }
 494         if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP &&
 495             (ccb->ccb_h.status & CAM_DEV_QFRZN) == 0) {
 496                 xpt_freeze_devq(ccb->ccb_h.path, 1);
 497                 ccb->ccb_h.status |= CAM_DEV_QFRZN;
 498         }
 499         xpt_done(ccb);
 500         ctl_free_io(io);
 501 }
 502
 503 void
 504 cfcs_action(struct cam_sim *sim, union ccb *ccb)
 505 {
 506         struct cfcs_softc *softc;
 507         int err;
 508
 509         softc = (struct cfcs_softc *)cam_sim_softc(sim);
 510         mtx_assert(&softc->lock, MA_OWNED);
 511
 512         switch (ccb->ccb_h.func_code) {
 513         case XPT_SCSI_IO: {
 514                 union ctl_io *io;
 515                 struct ccb_scsiio *csio;
 516
 517                 csio = &ccb->csio;
 518
 519                 /*
 520                  * Catch CCB flags, like physical address flags, that
 521                  * indicate situations we currently can't handle.
 522                  */
 523                 if (ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS) {
 524                         ccb->ccb_h.status = CAM_REQ_INVALID;
 525                         printf("%s: bad CCB flags %#x (all flags %#x)\n",
 526                                __func__, ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS,
 527                                ccb->ccb_h.flags);
 528                         xpt_done(ccb);
 529                         return;
 530                 }
 531
 532                 /*
 533                  * If we aren't online, there are no devices to see.
 534                  */
 535                 if (softc->online == 0) {
 536                         ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 537                         xpt_done(ccb);
 538                         return;
 539                 }
 540
 541                 io = ctl_alloc_io_nowait(softc->port.ctl_pool_ref);
 542                 if (io == NULL) {
 543                         printf("%s: can't allocate ctl_io\n", __func__);
 544                         ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
 545                         xpt_freeze_devq(ccb->ccb_h.path, 1);
 546                         xpt_done(ccb);
 547                         return;
 548                 }
 549                 ctl_zero_io(io);
 550                 /* Save pointers on both sides */
 551                 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
 552                 ccb->ccb_h.io_ptr = io;
 553
 554                 /*
 555                  * Only SCSI I/O comes down this path, resets, etc. come
 556                  * down via the XPT_RESET_BUS/LUN CCBs below.
 557                  */
 558                 io->io_hdr.io_type = CTL_IO_SCSI;
 559                 io->io_hdr.nexus.initid = 1;
 560                 io->io_hdr.nexus.targ_port = softc->port.targ_port;
 561                 io->io_hdr.nexus.targ_lun = ctl_decode_lun(
 562                     CAM_EXTLUN_BYTE_SWIZZLE(ccb->ccb_h.target_lun));
 563                 /*
 564                  * This tag scheme isn't the best, since we could in theory
 565                  * have a very long-lived I/O and tag collision, especially
 566                  * in a high I/O environment.  But it should work well
 567                  * enough for now.  Since we're using unsigned ints,
 568                  * they'll just wrap around.
 569                  */
 570                 io->scsiio.tag_num = softc->cur_tag_num++;
 571                 csio->tag_id = io->scsiio.tag_num;
 572                 switch (csio->tag_action) {
 573                 case CAM_TAG_ACTION_NONE:
 574                         io->scsiio.tag_type = CTL_TAG_UNTAGGED;
 575                         break;
 576                 case MSG_SIMPLE_TASK:
 577                         io->scsiio.tag_type = CTL_TAG_SIMPLE;
 578                         break;
 579                 case MSG_HEAD_OF_QUEUE_TASK:
 580                         io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
 581                         break;
 582                 case MSG_ORDERED_TASK:
 583                         io->scsiio.tag_type = CTL_TAG_ORDERED;
 584                         break;
 585                 case MSG_ACA_TASK:
 586                         io->scsiio.tag_type = CTL_TAG_ACA;
 587                         break;
 588                 default:
 589                         io->scsiio.tag_type = CTL_TAG_UNTAGGED;
 590                         printf("%s: unhandled tag type %#x!!\n", __func__,
 591                                csio->tag_action);
 592                         break;
 593                 }
 594                 if (csio->cdb_len > sizeof(io->scsiio.cdb)) {
 595                         printf("%s: WARNING: CDB len %d > ctl_io space %zd\n",
 596                                __func__, csio->cdb_len, sizeof(io->scsiio.cdb));
 597                 }
 598                 io->scsiio.cdb_len = min(csio->cdb_len, sizeof(io->scsiio.cdb));
 599                 bcopy(scsiio_cdb_ptr(csio), io->scsiio.cdb, io->scsiio.cdb_len);
 600
 601                 ccb->ccb_h.status |= CAM_SIM_QUEUED;
 602                 err = ctl_queue(io);
 603                 if (err != CTL_RETVAL_COMPLETE) {
 604                         printf("%s: func %d: error %d returned by "
 605                                "ctl_queue()!\n", __func__,
 606                                ccb->ccb_h.func_code, err);
 607                         ctl_free_io(io);
 608                         ccb->ccb_h.status = CAM_REQ_INVALID;
 609                         xpt_done(ccb);
 610                         return;
 611                 }
 612                 break;
 613         }
 614         case XPT_ABORT: {
 615                 union ctl_io *io;
 616                 union ccb *abort_ccb;
 617
 618                 abort_ccb = ccb->cab.abort_ccb;
 619
 620                 if (abort_ccb->ccb_h.func_code != XPT_SCSI_IO) {
 621                         ccb->ccb_h.status = CAM_REQ_INVALID;
 622                         xpt_done(ccb);
 623                 }
 624
 625                 /*
 626                  * If we aren't online, there are no devices to talk to.
 627                  */
 628                 if (softc->online == 0) {
 629                         ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 630                         xpt_done(ccb);
 631                         return;
 632                 }
 633
 634                 io = ctl_alloc_io_nowait(softc->port.ctl_pool_ref);
 635                 if (io == NULL) {
 636                         ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
 637                         xpt_freeze_devq(ccb->ccb_h.path, 1);
 638                         xpt_done(ccb);
 639                         return;
 640                 }
 641
 642                 ctl_zero_io(io);
 643                 /* Save pointers on both sides */
 644                 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
 645                 ccb->ccb_h.io_ptr = io;
 646
 647                 io->io_hdr.io_type = CTL_IO_TASK;
 648                 io->io_hdr.nexus.initid = 1;
 649                 io->io_hdr.nexus.targ_port = softc->port.targ_port;
 650                 io->io_hdr.nexus.targ_lun = ctl_decode_lun(
 651                     CAM_EXTLUN_BYTE_SWIZZLE(ccb->ccb_h.target_lun));
 652                 io->taskio.task_action = CTL_TASK_ABORT_TASK;
 653                 io->taskio.tag_num = abort_ccb->csio.tag_id;
 654                 switch (abort_ccb->csio.tag_action) {
 655                 case CAM_TAG_ACTION_NONE:
 656                         io->taskio.tag_type = CTL_TAG_UNTAGGED;
 657                         break;
 658                 case MSG_SIMPLE_TASK:
 659                         io->taskio.tag_type = CTL_TAG_SIMPLE;
 660                         break;
 661                 case MSG_HEAD_OF_QUEUE_TASK:
 662                         io->taskio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
 663                         break;
 664                 case MSG_ORDERED_TASK:
 665                         io->taskio.tag_type = CTL_TAG_ORDERED;
 666                         break;
 667                 case MSG_ACA_TASK:
 668                         io->taskio.tag_type = CTL_TAG_ACA;
 669                         break;
 670                 default:
 671                         io->taskio.tag_type = CTL_TAG_UNTAGGED;
 672                         printf("%s: unhandled tag type %#x!!\n", __func__,
 673                                abort_ccb->csio.tag_action);
 674                         break;
 675                 }
 676                 err = ctl_queue(io);
 677                 if (err != CTL_RETVAL_COMPLETE) {
 678                         printf("%s func %d: error %d returned by "
 679                                "ctl_queue()!\n", __func__,
 680                                ccb->ccb_h.func_code, err);
 681                         ctl_free_io(io);
 682                 }
 683                 break;
 684         }
 685         case XPT_GET_TRAN_SETTINGS: {
 686                 struct ccb_trans_settings *cts;
 687                 struct ccb_trans_settings_scsi *scsi;
 688                 struct ccb_trans_settings_fc *fc;
 689
 690                 cts = &ccb->cts;
 691                 scsi = &cts->proto_specific.scsi;
 692                 fc = &cts->xport_specific.fc;
 693
 694
 695                 cts->protocol = PROTO_SCSI;
 696                 cts->protocol_version = SCSI_REV_SPC2;
 697                 cts->transport = XPORT_FC;
 698                 cts->transport_version = 0;
 699
 700                 scsi->valid = CTS_SCSI_VALID_TQ;
 701                 scsi->flags = CTS_SCSI_FLAGS_TAG_ENB;
 702                 fc->valid = CTS_FC_VALID_SPEED;
 703                 fc->bitrate = 800000;
 704                 fc->wwnn = softc->wwnn;
 705                 fc->wwpn = softc->wwpn;
 706                 fc->port = softc->port.targ_port;
 707                 fc->valid |= CTS_FC_VALID_WWNN | CTS_FC_VALID_WWPN |
 708                         CTS_FC_VALID_PORT;
 709                 ccb->ccb_h.status = CAM_REQ_CMP;
 710                 break;
 711         }
 712         case XPT_SET_TRAN_SETTINGS:
 713                 /* XXX KDM should we actually do something here? */
 714                 ccb->ccb_h.status = CAM_REQ_CMP;
 715                 break;
 716         case XPT_RESET_BUS:
 717         case XPT_RESET_DEV: {
 718                 union ctl_io *io;
 719
 720                 /*
 721                  * If we aren't online, there are no devices to talk to.
 722                  */
 723                 if (softc->online == 0) {
 724                         ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 725                         xpt_done(ccb);
 726                         return;
 727                 }
 728
 729                 io = ctl_alloc_io_nowait(softc->port.ctl_pool_ref);
 730                 if (io == NULL) {
 731                         ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
 732                         xpt_freeze_devq(ccb->ccb_h.path, 1);
 733                         xpt_done(ccb);
 734                         return;
 735                 }
 736
 737                 ctl_zero_io(io);
 738                 /* Save pointers on both sides */
 739                 if (ccb->ccb_h.func_code == XPT_RESET_DEV)
 740                         io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
 741                 ccb->ccb_h.io_ptr = io;
 742
 743                 io->io_hdr.io_type = CTL_IO_TASK;
 744                 io->io_hdr.nexus.initid = 1;
 745                 io->io_hdr.nexus.targ_port = softc->port.targ_port;
 746                 io->io_hdr.nexus.targ_lun = ctl_decode_lun(
 747                     CAM_EXTLUN_BYTE_SWIZZLE(ccb->ccb_h.target_lun));
 748                 if (ccb->ccb_h.func_code == XPT_RESET_BUS)
 749                         io->taskio.task_action = CTL_TASK_BUS_RESET;
 750                 else
 751                         io->taskio.task_action = CTL_TASK_LUN_RESET;
 752
 753                 err = ctl_queue(io);
 754                 if (err != CTL_RETVAL_COMPLETE) {
 755                         printf("%s func %d: error %d returned by "
 756                               "ctl_queue()!\n", __func__,
 757                               ccb->ccb_h.func_code, err);
 758                         ctl_free_io(io);
 759                 }
 760                 break;
 761         }
 762         case XPT_CALC_GEOMETRY:
 763                 cam_calc_geometry(&ccb->ccg, 1);
 764                 xpt_done(ccb);
 765                 break;
 766         case XPT_PATH_INQ: {
 767                 struct ccb_pathinq *cpi;
 768
 769                 cpi = &ccb->cpi;
 770
 771                 cpi->version_num = 0;
 772                 cpi->hba_inquiry = PI_TAG_ABLE;
 773                 cpi->target_sprt = 0;
 774                 cpi->hba_misc = PIM_EXTLUNS;
 775                 cpi->hba_eng_cnt = 0;
 776                 cpi->max_target = 1;
 777                 cpi->max_lun = 1024;
 778                 /* Do we really have a limit? */
 779                 cpi->maxio = 1024 * 1024;
 780                 cpi->async_flags = 0;
 781                 cpi->hpath_id = 0;
 782                 cpi->initiator_id = 0;
 783
 784                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
 785                 strlcpy(cpi->hba_vid, "FreeBSD", HBA_IDLEN);
 786                 strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
 787                 cpi->unit_number = 0;
 788                 cpi->bus_id = 0;
 789                 cpi->base_transfer_speed = 800000;
 790                 cpi->protocol = PROTO_SCSI;
 791                 cpi->protocol_version = SCSI_REV_SPC2;
 792                 /*
 793                  * Pretend to be Fibre Channel.
 794                  */
 795                 cpi->transport = XPORT_FC;
 796                 cpi->transport_version = 0;
 797                 cpi->xport_specific.fc.wwnn = softc->wwnn;
 798                 cpi->xport_specific.fc.wwpn = softc->wwpn;
 799                 cpi->xport_specific.fc.port = softc->port.targ_port;
 800                 cpi->xport_specific.fc.bitrate = 8 * 1000 * 1000;
 801                 cpi->ccb_h.status = CAM_REQ_CMP;
 802                 break;
 803         }
 804         default:
 805                 ccb->ccb_h.status = CAM_PROVIDE_FAIL;
 806                 printf("%s: unsupported CCB type %#x\n", __func__,
 807                        ccb->ccb_h.func_code);
 808                 xpt_done(ccb);
 809                 break;
 810         }
 811 }