sys/cam/ctl/ctl_frontend_cam_sim.c

   1 /*-
   2  * Copyright (c) 2009 Silicon Graphics International Corp.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions, and the following disclaimer,
  10  *    without modification.
  11  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  12  *    substantially similar to the "NO WARRANTY" disclaimer below
  13  *    ("Disclaimer") and any redistribution must be conditioned upon
  14  *    including a substantially similar Disclaimer requirement for further
  15  *    binary redistribution.
  16  *
  17  * NO WARRANTY
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  26  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  27  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGES.
  29  *
  30  * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_frontend_cam_sim.c#4 $
  31  */
  32 /*
  33  * CTL frontend to CAM SIM interface.  This allows access to CTL LUNs via
  34  * the da(4) and pass(4) drivers from inside the system.
  35  *
  36  * Author: Ken Merry <ken@FreeBSD.org>
  37  */
  38
  39 #include <sys/cdefs.h>
  40 __FBSDID("$FreeBSD$");
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/kernel.h>
  45 #include <sys/types.h>
  46 #include <sys/malloc.h>
  47 #include <sys/lock.h>
  48 #include <sys/mutex.h>
  49 #include <sys/condvar.h>
  50 #include <sys/queue.h>
  51 #include <sys/bus.h>
  52 #include <sys/sysctl.h>
  53 #include <machine/bus.h>
  54 #include <sys/sbuf.h>
  55
  56 #include <cam/cam.h>
  57 #include <cam/cam_ccb.h>
  58 #include <cam/cam_sim.h>
  59 #include <cam/cam_xpt_sim.h>
  60 #include <cam/cam_xpt.h>
  61 #include <cam/cam_periph.h>
  62 #include <cam/scsi/scsi_all.h>
  63 #include <cam/scsi/scsi_message.h>
  64 #include <cam/ctl/ctl_io.h>
  65 #include <cam/ctl/ctl.h>
  66 #include <cam/ctl/ctl_frontend.h>
  67 #include <cam/ctl/ctl_frontend_internal.h>
  68 #include <cam/ctl/ctl_mem_pool.h>
  69 #include <cam/ctl/ctl_debug.h>
  70
  71 #define io_ptr          spriv_ptr1
  72
  73 struct cfcs_io {
  74         union ccb *ccb;
  75 };
  76
  77 struct cfcs_softc {
  78         struct ctl_frontend fe;
  79         char port_name[32];
  80         struct cam_sim *sim;
  81         struct cam_devq *devq;
  82         struct cam_path *path;
  83         struct mtx lock;
  84         char lock_desc[32];
  85         uint64_t wwnn;
  86         uint64_t wwpn;
  87         uint32_t cur_tag_num;
  88         int online;
  89 };
  90
  91 /*
  92  * We can't handle CCBs with these flags.  For the most part, we just don't
  93  * handle physical addresses yet.  That would require mapping things in
  94  * order to do the copy.
  95  */
  96 #define CFCS_BAD_CCB_FLAGS (CAM_DATA_ISPHYS | CAM_MSG_BUF_PHYS |        \
  97         CAM_SNS_BUF_PHYS | CAM_CDB_PHYS | CAM_SENSE_PTR |               \
  98         CAM_SENSE_PHYS)
  99
 100 int cfcs_init(void);
 101 void cfcs_shutdown(void);
 102 static void cfcs_poll(struct cam_sim *sim);
 103 static void cfcs_online(void *arg);
 104 static void cfcs_offline(void *arg);
 105 static int cfcs_targ_enable(void *arg, struct ctl_id targ_id);
 106 static int cfcs_targ_disable(void *arg, struct ctl_id targ_id);
 107 static int cfcs_lun_enable(void *arg, struct ctl_id target_id, int lun_id);
 108 static int cfcs_lun_disable(void *arg, struct ctl_id target_id, int lun_id);
 109 static void cfcs_datamove(union ctl_io *io);
 110 static void cfcs_done(union ctl_io *io);
 111 void cfcs_action(struct cam_sim *sim, union ccb *ccb);
 112 static void cfcs_async(void *callback_arg, uint32_t code,
 113                        struct cam_path *path, void *arg);
 114
 115 struct cfcs_softc cfcs_softc;
 116 /*
 117  * This is primarly intended to allow for error injection to test the CAM
 118  * sense data and sense residual handling code.  This sets the maximum
 119  * amount of SCSI sense data that we will report to CAM.
 120  */
 121 static int cfcs_max_sense = sizeof(struct scsi_sense_data);
 122 extern int ctl_disable;
 123
 124 SYSCTL_NODE(_kern_cam, OID_AUTO, ctl2cam, CTLFLAG_RD, 0,
 125             "CAM Target Layer SIM frontend");
 126 SYSCTL_INT(_kern_cam_ctl2cam, OID_AUTO, max_sense, CTLFLAG_RW,
 127            &cfcs_max_sense, 0, "Maximum sense data size");
 128
 129 static int cfcs_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 130
 131 static moduledata_t cfcs_moduledata = {
 132         "ctlcfcs",
 133         cfcs_module_event_handler,
 134         NULL
 135 };
 136
 137 DECLARE_MODULE(ctlcfcs, cfcs_moduledata, SI_SUB_CONFIGURE, SI_ORDER_FOURTH);
 138 MODULE_VERSION(ctlcfcs, 1);
 139 MODULE_DEPEND(ctlcfi, ctl, 1, 1, 1);
 140 MODULE_DEPEND(ctlcfi, cam, 1, 1, 1);
 141
 142 int
 143 cfcs_init(void)
 144 {
 145         struct cfcs_softc *softc;
 146         struct ccb_setasync csa;
 147         struct ctl_frontend *fe;
 148 #ifdef NEEDTOPORT
 149         char wwnn[8];
 150 #endif
 151         int retval;
 152
 153         /* Don't continue if CTL is disabled */
 154         if (ctl_disable != 0)
 155                 return (0);
 156
 157         softc = &cfcs_softc;
 158         retval = 0;
 159         bzero(softc, sizeof(*softc));
 160         sprintf(softc->lock_desc, "ctl2cam");
 161         mtx_init(&softc->lock, softc->lock_desc, NULL, MTX_DEF);
 162         fe = &softc->fe;
 163
 164         fe->port_type = CTL_PORT_INTERNAL;
 165         /* XXX KDM what should the real number be here? */
 166         fe->num_requested_ctl_io = 4096;
 167         snprintf(softc->port_name, sizeof(softc->port_name), "ctl2cam");
 168         fe->port_name = softc->port_name;
 169         fe->port_online = cfcs_online;
 170         fe->port_offline = cfcs_offline;
 171         fe->onoff_arg = softc;
 172         fe->targ_enable = cfcs_targ_enable;
 173         fe->targ_disable = cfcs_targ_disable;
 174         fe->lun_enable = cfcs_lun_enable;
 175         fe->lun_disable = cfcs_lun_disable;
 176         fe->targ_lun_arg = softc;
 177         fe->fe_datamove = cfcs_datamove;
 178         fe->fe_done = cfcs_done;
 179
 180         /* XXX KDM what should we report here? */
 181         /* XXX These should probably be fetched from CTL. */
 182         fe->max_targets = 1;
 183         fe->max_target_id = 15;
 184
 185         retval = ctl_frontend_register(fe, /*master_SC*/ 1);
 186         if (retval != 0) {
 187                 printf("%s: ctl_frontend_register() failed with error %d!\n",
 188                        __func__, retval);
 189                 mtx_destroy(&softc->lock);
 190                 return (retval);
 191         }
 192
 193         /*
 194          * Get the WWNN out of the database, and create a WWPN as well.
 195          */
 196 #ifdef NEEDTOPORT
 197         ddb_GetWWNN((char *)wwnn);
 198         softc->wwnn = be64dec(wwnn);
 199         softc->wwpn = softc->wwnn + (softc->fe.targ_port & 0xff);
 200 #endif
 201
 202         /*
 203          * If the CTL frontend didn't tell us what our WWNN/WWPN is, go
 204          * ahead and set something random.
 205          */
 206         if (fe->wwnn == 0) {
 207                 uint64_t random_bits;
 208
 209                 arc4rand(&random_bits, sizeof(random_bits), 0);
 210                 softc->wwnn = (random_bits & 0x0000000fffffff00ULL) |
 211                         /* Company ID */ 0x5000000000000000ULL |
 212                         /* NL-Port */    0x0300;
 213                 softc->wwpn = softc->wwnn + fe->targ_port + 1;
 214                 fe->wwnn = softc->wwnn;
 215                 fe->wwpn = softc->wwpn;
 216         } else {
 217                 softc->wwnn = fe->wwnn;
 218                 softc->wwpn = fe->wwpn;
 219         }
 220
 221         mtx_lock(&softc->lock);
 222         softc->devq = cam_simq_alloc(fe->num_requested_ctl_io);
 223         if (softc->devq == NULL) {
 224                 printf("%s: error allocating devq\n", __func__);
 225                 retval = ENOMEM;
 226                 goto bailout;
 227         }
 228
 229         softc->sim = cam_sim_alloc(cfcs_action, cfcs_poll, softc->port_name,
 230                                    softc, /*unit*/ 0, &softc->lock, 1,
 231                                    fe->num_requested_ctl_io, softc->devq);
 232         if (softc->sim == NULL) {
 233                 printf("%s: error allocating SIM\n", __func__);
 234                 retval = ENOMEM;
 235                 goto bailout;
 236         }
 237
 238         if (xpt_bus_register(softc->sim, NULL, 0) != CAM_SUCCESS) {
 239                 printf("%s: error registering SIM\n", __func__);
 240                 retval = ENOMEM;
 241                 goto bailout;
 242         }
 243
 244         if (xpt_create_path(&softc->path, /*periph*/NULL,
 245                             cam_sim_path(softc->sim),
 246                             CAM_TARGET_WILDCARD,
 247                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 248                 printf("%s: error creating path\n", __func__);
 249                 xpt_bus_deregister(cam_sim_path(softc->sim));
 250                 retval = EINVAL;
 251                 goto bailout;
 252         }
 253
 254         xpt_setup_ccb(&csa.ccb_h, softc->path, CAM_PRIORITY_NONE);
 255         csa.ccb_h.func_code = XPT_SASYNC_CB;
 256         csa.event_enable = AC_LOST_DEVICE;
 257         csa.callback = cfcs_async;
 258         csa.callback_arg = softc->sim;
 259         xpt_action((union ccb *)&csa);
 260
 261         mtx_unlock(&softc->lock);
 262
 263         return (retval);
 264
 265 bailout:
 266         if (softc->sim)
 267                 cam_sim_free(softc->sim, /*free_devq*/ TRUE);
 268         else if (softc->devq)
 269                 cam_simq_free(softc->devq);
 270         mtx_unlock(&softc->lock);
 271         mtx_destroy(&softc->lock);
 272
 273         return (retval);
 274 }
 275
 276 static void
 277 cfcs_poll(struct cam_sim *sim)
 278 {
 279
 280 }
 281
 282 void
 283 cfcs_shutdown(void)
 284 {
 285
 286 }
 287
 288 static int
 289 cfcs_module_event_handler(module_t mod, int what, void *arg)
 290 {
 291
 292         switch (what) {
 293         case MOD_LOAD:
 294                 return (cfcs_init());
 295         case MOD_UNLOAD:
 296                 return (EBUSY);
 297         default:
 298                 return (EOPNOTSUPP);
 299         }
 300 }
 301
 302 static void
 303 cfcs_onoffline(void *arg, int online)
 304 {
 305         struct cfcs_softc *softc;
 306         union ccb *ccb;
 307
 308         softc = (struct cfcs_softc *)arg;
 309
 310         mtx_lock(&softc->lock);
 311         softc->online = online;
 312
 313         ccb = xpt_alloc_ccb_nowait();
 314         if (ccb == NULL) {
 315                 printf("%s: unable to allocate CCB for rescan\n", __func__);
 316                 goto bailout;
 317         }
 318
 319         if (xpt_create_path(&ccb->ccb_h.path, NULL,
 320                             cam_sim_path(softc->sim), CAM_TARGET_WILDCARD,
 321                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 322                 printf("%s: can't allocate path for rescan\n", __func__);
 323                 xpt_free_ccb(ccb);
 324                 goto bailout;
 325         }
 326         xpt_rescan(ccb);
 327
 328 bailout:
 329         mtx_unlock(&softc->lock);
 330 }
 331
 332 static void
 333 cfcs_online(void *arg)
 334 {
 335         cfcs_onoffline(arg, /*online*/ 1);
 336 }
 337
 338 static void
 339 cfcs_offline(void *arg)
 340 {
 341         cfcs_onoffline(arg, /*online*/ 0);
 342 }
 343
 344 static int
 345 cfcs_targ_enable(void *arg, struct ctl_id targ_id)
 346 {
 347         return (0);
 348 }
 349
 350 static int
 351 cfcs_targ_disable(void *arg, struct ctl_id targ_id)
 352 {
 353         return (0);
 354 }
 355
 356 static int
 357 cfcs_lun_enable(void *arg, struct ctl_id target_id, int lun_id)
 358 {
 359         return (0);
 360 }
 361 static int
 362 cfcs_lun_disable(void *arg, struct ctl_id target_id, int lun_id)
 363 {
 364         return (0);
 365 }
 366
 367 /*
 368  * This function is very similar to ctl_ioctl_do_datamove().  Is there a
 369  * way to combine the functionality?
 370  *
 371  * XXX KDM may need to move this into a thread.  We're doing a bcopy in the
 372  * caller's context, which will usually be the backend.  That may not be a
 373  * good thing.
 374  */
 375 static void
 376 cfcs_datamove(union ctl_io *io)
 377 {
 378         union ccb *ccb;
 379         bus_dma_segment_t cam_sg_entry, *cam_sglist;
 380         struct ctl_sg_entry ctl_sg_entry, *ctl_sglist;
 381         int cam_sg_count, ctl_sg_count, cam_sg_start;
 382         int cam_sg_offset;
 383         int len_to_copy, len_copied;
 384         int ctl_watermark, cam_watermark;
 385         int i, j;
 386
 387
 388         cam_sg_offset = 0;
 389         cam_sg_start = 0;
 390
 391         ccb = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
 392
 393         /*
 394          * Note that we have a check in cfcs_action() to make sure that any
 395          * CCBs with "bad" flags are returned with CAM_REQ_INVALID.  This
 396          * is just to make sure no one removes that check without updating
 397          * this code to provide the additional functionality necessary to
 398          * support those modes of operation.
 399          */
 400         KASSERT(((ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS) == 0), ("invalid "
 401                   "CAM flags %#x", (ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS)));
 402
 403         /*
 404          * Simplify things on both sides by putting single buffers into a
 405          * single entry S/G list.
 406          */
 407         switch ((ccb->ccb_h.flags & CAM_DATA_MASK)) {
 408         case CAM_DATA_SG: {
 409                 int len_seen;
 410
 411                 cam_sglist = (bus_dma_segment_t *)ccb->csio.data_ptr;
 412                 cam_sg_count = ccb->csio.sglist_cnt;
 413
 414                 for (i = 0, len_seen = 0; i < cam_sg_count; i++) {
 415                         if ((len_seen + cam_sglist[i].ds_len) >=
 416                              io->scsiio.kern_rel_offset) {
 417                                 cam_sg_start = i;
 418                                 cam_sg_offset = io->scsiio.kern_rel_offset -
 419                                         len_seen;
 420                                 break;
 421                         }
 422                         len_seen += cam_sglist[i].ds_len;
 423                 }
 424                 break;
 425         }
 426         case CAM_DATA_VADDR:
 427                 cam_sglist = &cam_sg_entry;
 428                 cam_sglist[0].ds_len = ccb->csio.dxfer_len;
 429                 cam_sglist[0].ds_addr = (bus_addr_t)ccb->csio.data_ptr;
 430                 cam_sg_count = 1;
 431                 cam_sg_start = 0;
 432                 cam_sg_offset = io->scsiio.kern_rel_offset;
 433                 break;
 434         default:
 435                 panic("Invalid CAM flags %#x", ccb->ccb_h.flags);
 436         }
 437
 438         if (io->scsiio.kern_sg_entries > 0) {
 439                 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr;
 440                 ctl_sg_count = io->scsiio.kern_sg_entries;
 441         } else {
 442                 ctl_sglist = &ctl_sg_entry;
 443                 ctl_sglist->addr = io->scsiio.kern_data_ptr;
 444                 ctl_sglist->len = io->scsiio.kern_data_len;
 445                 ctl_sg_count = 1;
 446         }
 447
 448         ctl_watermark = 0;
 449         cam_watermark = cam_sg_offset;
 450         len_copied = 0;
 451         for (i = cam_sg_start, j = 0;
 452              i < cam_sg_count && j < ctl_sg_count;) {
 453                 uint8_t *cam_ptr, *ctl_ptr;
 454
 455                 len_to_copy = ctl_min(cam_sglist[i].ds_len - cam_watermark,
 456                                       ctl_sglist[j].len - ctl_watermark);
 457
 458                 cam_ptr = (uint8_t *)cam_sglist[i].ds_addr;
 459                 cam_ptr = cam_ptr + cam_watermark;
 460                 if (io->io_hdr.flags & CTL_FLAG_BUS_ADDR) {
 461                         /*
 462                          * XXX KDM fix this!
 463                          */
 464                         panic("need to implement bus address support");
 465 #if 0
 466                         kern_ptr = bus_to_virt(kern_sglist[j].addr);
 467 #endif
 468                 } else
 469                         ctl_ptr = (uint8_t *)ctl_sglist[j].addr;
 470                 ctl_ptr = ctl_ptr + ctl_watermark;
 471
 472                 ctl_watermark += len_to_copy;
 473                 cam_watermark += len_to_copy;
 474
 475                 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) ==
 476                      CTL_FLAG_DATA_IN) {
 477                         CTL_DEBUG_PRINT(("%s: copying %d bytes to CAM\n",
 478                                          __func__, len_to_copy));
 479                         CTL_DEBUG_PRINT(("%s: from %p to %p\n", ctl_ptr,
 480                                          __func__, cam_ptr));
 481                         bcopy(ctl_ptr, cam_ptr, len_to_copy);
 482                 } else {
 483                         CTL_DEBUG_PRINT(("%s: copying %d bytes from CAM\n",
 484                                          __func__, len_to_copy));
 485                         CTL_DEBUG_PRINT(("%s: from %p to %p\n", cam_ptr,
 486                                          __func__, ctl_ptr));
 487                         bcopy(cam_ptr, ctl_ptr, len_to_copy);
 488                 }
 489
 490                 len_copied += len_to_copy;
 491
 492                 if (cam_sglist[i].ds_len == cam_watermark) {
 493                         i++;
 494                         cam_watermark = 0;
 495                 }
 496
 497                 if (ctl_sglist[j].len == ctl_watermark) {
 498                         j++;
 499                         ctl_watermark = 0;
 500                 }
 501         }
 502
 503         io->scsiio.ext_data_filled += len_copied;
 504
 505         io->scsiio.be_move_done(io);
 506 }
 507
 508 static void
 509 cfcs_done(union ctl_io *io)
 510 {
 511         union ccb *ccb;
 512         struct cfcs_softc *softc;
 513         struct cam_sim *sim;
 514
 515         ccb = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
 516
 517         sim = xpt_path_sim(ccb->ccb_h.path);
 518         softc = (struct cfcs_softc *)cam_sim_softc(sim);
 519
 520         /*
 521          * At this point we should have status.  If we don't, that's a bug.
 522          */
 523         KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE),
 524                 ("invalid CTL status %#x", io->io_hdr.status));
 525
 526         /*
 527          * Translate CTL status to CAM status.
 528          */
 529         switch (io->io_hdr.status & CTL_STATUS_MASK) {
 530         case CTL_SUCCESS:
 531                 ccb->ccb_h.status = CAM_REQ_CMP;
 532                 break;
 533         case CTL_SCSI_ERROR:
 534                 ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID;
 535                 ccb->csio.scsi_status = io->scsiio.scsi_status;
 536                 bcopy(&io->scsiio.sense_data, &ccb->csio.sense_data,
 537                       min(io->scsiio.sense_len, ccb->csio.sense_len));
 538                 if (ccb->csio.sense_len > io->scsiio.sense_len)
 539                         ccb->csio.sense_resid = ccb->csio.sense_len -
 540                                                 io->scsiio.sense_len;
 541                 else
 542                         ccb->csio.sense_resid = 0;
 543                 if ((ccb->csio.sense_len - ccb->csio.sense_resid) >
 544                      cfcs_max_sense) {
 545                         ccb->csio.sense_resid = ccb->csio.sense_len -
 546                                                 cfcs_max_sense;
 547                 }
 548                 break;
 549         case CTL_CMD_ABORTED:
 550                 ccb->ccb_h.status = CAM_REQ_ABORTED;
 551                 break;
 552         case CTL_ERROR:
 553         default:
 554                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 555                 break;
 556         }
 557
 558         mtx_lock(sim->mtx);
 559         xpt_done(ccb);
 560         mtx_unlock(sim->mtx);
 561
 562         ctl_free_io(io);
 563 }
 564
 565 void
 566 cfcs_action(struct cam_sim *sim, union ccb *ccb)
 567 {
 568         struct cfcs_softc *softc;
 569         int err;
 570
 571         softc = (struct cfcs_softc *)cam_sim_softc(sim);
 572         mtx_assert(&softc->lock, MA_OWNED);
 573
 574         switch (ccb->ccb_h.func_code) {
 575         case XPT_SCSI_IO: {
 576                 union ctl_io *io;
 577                 struct ccb_scsiio *csio;
 578
 579                 csio = &ccb->csio;
 580
 581                 /*
 582                  * Catch CCB flags, like physical address flags, that
 583                  * indicate situations we currently can't handle.
 584                  */
 585                 if (ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS) {
 586                         ccb->ccb_h.status = CAM_REQ_INVALID;
 587                         printf("%s: bad CCB flags %#x (all flags %#x)\n",
 588                                __func__, ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS,
 589                                ccb->ccb_h.flags);
 590                         xpt_done(ccb);
 591                         return;
 592                 }
 593
 594                 /*
 595                  * If we aren't online, there are no devices to see.
 596                  */
 597                 if (softc->online == 0) {
 598                         ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 599                         xpt_done(ccb);
 600                         return;
 601                 }
 602
 603                 io = ctl_alloc_io(softc->fe.ctl_pool_ref);
 604                 if (io == NULL) {
 605                         printf("%s: can't allocate ctl_io\n", __func__);
 606                         ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
 607                         xpt_freeze_devq(ccb->ccb_h.path, 1);
 608                         xpt_done(ccb);
 609                         return;
 610                 }
 611                 ctl_zero_io(io);
 612                 /* Save pointers on both sides */
 613                 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
 614                 ccb->ccb_h.io_ptr = io;
 615
 616                 /*
 617                  * Only SCSI I/O comes down this path, resets, etc. come
 618                  * down via the XPT_RESET_BUS/LUN CCBs below.
 619                  */
 620                 io->io_hdr.io_type = CTL_IO_SCSI;
 621                 io->io_hdr.nexus.initid.id = 1;
 622                 io->io_hdr.nexus.targ_port = softc->fe.targ_port;
 623                 /*
 624                  * XXX KDM how do we handle target IDs?
 625                  */
 626                 io->io_hdr.nexus.targ_target.id = ccb->ccb_h.target_id;
 627                 io->io_hdr.nexus.targ_lun = ccb->ccb_h.target_lun;
 628                 /*
 629                  * This tag scheme isn't the best, since we could in theory
 630                  * have a very long-lived I/O and tag collision, especially
 631                  * in a high I/O environment.  But it should work well
 632                  * enough for now.  Since we're using unsigned ints,
 633                  * they'll just wrap around.
 634                  */
 635                 io->scsiio.tag_num = softc->cur_tag_num++;
 636                 csio->tag_id = io->scsiio.tag_num;
 637                 switch (csio->tag_action) {
 638                 case CAM_TAG_ACTION_NONE:
 639                         io->scsiio.tag_type = CTL_TAG_UNTAGGED;
 640                         break;
 641                 case MSG_SIMPLE_TASK:
 642                         io->scsiio.tag_type = CTL_TAG_SIMPLE;
 643                         break;
 644                 case MSG_HEAD_OF_QUEUE_TASK:
 645                         io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
 646                         break;
 647                 case MSG_ORDERED_TASK:
 648                         io->scsiio.tag_type = CTL_TAG_ORDERED;
 649                         break;
 650                 case MSG_ACA_TASK:
 651                         io->scsiio.tag_type = CTL_TAG_ACA;
 652                         break;
 653                 default:
 654                         io->scsiio.tag_type = CTL_TAG_UNTAGGED;
 655                         printf("%s: unhandled tag type %#x!!\n", __func__,
 656                                csio->tag_action);
 657                         break;
 658                 }
 659                 if (csio->cdb_len > sizeof(io->scsiio.cdb)) {
 660                         printf("%s: WARNING: CDB len %d > ctl_io space %zd\n",
 661                                __func__, csio->cdb_len, sizeof(io->scsiio.cdb));
 662                 }
 663                 io->scsiio.cdb_len = min(csio->cdb_len, sizeof(io->scsiio.cdb));
 664                 bcopy(csio->cdb_io.cdb_bytes, io->scsiio.cdb,
 665                       io->scsiio.cdb_len);
 666
 667                 err = ctl_queue(io);
 668                 if (err != CTL_RETVAL_COMPLETE) {
 669                         printf("%s: func %d: error %d returned by "
 670                                "ctl_queue()!\n", __func__,
 671                                ccb->ccb_h.func_code, err);
 672                         ctl_free_io(io);
 673                 } else {
 674                         ccb->ccb_h.status |= CAM_SIM_QUEUED;
 675                 }
 676                 break;
 677         }
 678         case XPT_ABORT: {
 679                 union ctl_io *io;
 680                 union ccb *abort_ccb;
 681
 682                 abort_ccb = ccb->cab.abort_ccb;
 683
 684                 if (abort_ccb->ccb_h.func_code != XPT_SCSI_IO) {
 685                         ccb->ccb_h.status = CAM_REQ_INVALID;
 686                         xpt_done(ccb);
 687                 }
 688
 689                 /*
 690                  * If we aren't online, there are no devices to talk to.
 691                  */
 692                 if (softc->online == 0) {
 693                         ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 694                         xpt_done(ccb);
 695                         return;
 696                 }
 697
 698                 io = ctl_alloc_io(softc->fe.ctl_pool_ref);
 699                 if (io == NULL) {
 700                         ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
 701                         xpt_freeze_devq(ccb->ccb_h.path, 1);
 702                         xpt_done(ccb);
 703                         return;
 704                 }
 705
 706                 ctl_zero_io(io);
 707                 /* Save pointers on both sides */
 708                 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
 709                 ccb->ccb_h.io_ptr = io;
 710
 711                 io->io_hdr.io_type = CTL_IO_TASK;
 712                 io->io_hdr.nexus.initid.id = 1;
 713                 io->io_hdr.nexus.targ_port = softc->fe.targ_port;
 714                 io->io_hdr.nexus.targ_target.id = ccb->ccb_h.target_id;
 715                 io->io_hdr.nexus.targ_lun = ccb->ccb_h.target_lun;
 716                 io->taskio.task_action = CTL_TASK_ABORT_TASK;
 717                 io->taskio.tag_num = abort_ccb->csio.tag_id;
 718                 switch (abort_ccb->csio.tag_action) {
 719                 case CAM_TAG_ACTION_NONE:
 720                         io->taskio.tag_type = CTL_TAG_UNTAGGED;
 721                         break;
 722                 case MSG_SIMPLE_TASK:
 723                         io->taskio.tag_type = CTL_TAG_SIMPLE;
 724                         break;
 725                 case MSG_HEAD_OF_QUEUE_TASK:
 726                         io->taskio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
 727                         break;
 728                 case MSG_ORDERED_TASK:
 729                         io->taskio.tag_type = CTL_TAG_ORDERED;
 730                         break;
 731                 case MSG_ACA_TASK:
 732                         io->taskio.tag_type = CTL_TAG_ACA;
 733                         break;
 734                 default:
 735                         io->taskio.tag_type = CTL_TAG_UNTAGGED;
 736                         printf("%s: unhandled tag type %#x!!\n", __func__,
 737                                abort_ccb->csio.tag_action);
 738                         break;
 739                 }
 740                 err = ctl_queue(io);
 741                 if (err != CTL_RETVAL_COMPLETE) {
 742                         printf("%s func %d: error %d returned by "
 743                                "ctl_queue()!\n", __func__,
 744                                ccb->ccb_h.func_code, err);
 745                         ctl_free_io(io);
 746                 }
 747                 break;
 748         }
 749         case XPT_GET_TRAN_SETTINGS: {
 750                 struct ccb_trans_settings *cts;
 751                 struct ccb_trans_settings_scsi *scsi;
 752                 struct ccb_trans_settings_fc *fc;
 753
 754                 cts = &ccb->cts;
 755                 scsi = &cts->proto_specific.scsi;
 756                 fc = &cts->xport_specific.fc;
 757
 758
 759                 cts->protocol = PROTO_SCSI;
 760                 cts->protocol_version = SCSI_REV_SPC2;
 761                 cts->transport = XPORT_FC;
 762                 cts->transport_version = 0;
 763
 764                 scsi->valid = CTS_SCSI_VALID_TQ;
 765                 scsi->flags = CTS_SCSI_FLAGS_TAG_ENB;
 766                 fc->valid = CTS_FC_VALID_SPEED;
 767                 fc->bitrate = 800000;
 768                 fc->wwnn = softc->wwnn;
 769                 fc->wwpn = softc->wwpn;
 770                 fc->port = softc->fe.targ_port;
 771                 fc->valid |= CTS_FC_VALID_WWNN | CTS_FC_VALID_WWPN |
 772                         CTS_FC_VALID_PORT;
 773                 ccb->ccb_h.status = CAM_REQ_CMP;
 774                 break;
 775         }
 776         case XPT_SET_TRAN_SETTINGS:
 777                 /* XXX KDM should we actually do something here? */
 778                 ccb->ccb_h.status = CAM_REQ_CMP;
 779                 break;
 780         case XPT_RESET_BUS:
 781         case XPT_RESET_DEV: {
 782                 union ctl_io *io;
 783
 784                 /*
 785                  * If we aren't online, there are no devices to talk to.
 786                  */
 787                 if (softc->online == 0) {
 788                         ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 789                         xpt_done(ccb);
 790                         return;
 791                 }
 792
 793                 io = ctl_alloc_io(softc->fe.ctl_pool_ref);
 794                 if (io == NULL) {
 795                         ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
 796                         xpt_freeze_devq(ccb->ccb_h.path, 1);
 797                         xpt_done(ccb);
 798                         return;
 799                 }
 800
 801                 ctl_zero_io(io);
 802                 /* Save pointers on both sides */
 803                 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
 804                 ccb->ccb_h.io_ptr = io;
 805
 806                 io->io_hdr.io_type = CTL_IO_TASK;
 807                 io->io_hdr.nexus.initid.id = 0;
 808                 io->io_hdr.nexus.targ_port = softc->fe.targ_port;
 809                 io->io_hdr.nexus.targ_target.id = ccb->ccb_h.target_id;
 810                 io->io_hdr.nexus.targ_lun = ccb->ccb_h.target_lun;
 811                 if (ccb->ccb_h.func_code == XPT_RESET_BUS)
 812                         io->taskio.task_action = CTL_TASK_BUS_RESET;
 813                 else
 814                         io->taskio.task_action = CTL_TASK_LUN_RESET;
 815
 816                 err = ctl_queue(io);
 817                 if (err != CTL_RETVAL_COMPLETE) {
 818                         printf("%s func %d: error %d returned by "
 819                               "ctl_queue()!\n", __func__,
 820                               ccb->ccb_h.func_code, err);
 821                         ctl_free_io(io);
 822                 }
 823                 break;
 824         }
 825         case XPT_CALC_GEOMETRY:
 826                 cam_calc_geometry(&ccb->ccg, 1);
 827                 xpt_done(ccb);
 828                 break;
 829         case XPT_PATH_INQ: {
 830                 struct ccb_pathinq *cpi;
 831
 832                 cpi = &ccb->cpi;
 833
 834                 cpi->version_num = 0;
 835                 cpi->hba_inquiry = PI_TAG_ABLE;
 836                 cpi->target_sprt = 0;
 837                 cpi->hba_misc = 0;
 838                 cpi->hba_eng_cnt = 0;
 839                 cpi->max_target = 1;
 840                 cpi->max_lun = 1024;
 841                 /* Do we really have a limit? */
 842                 cpi->maxio = 1024 * 1024;
 843                 cpi->async_flags = 0;
 844                 cpi->hpath_id = 0;
 845                 cpi->initiator_id = 0;
 846
 847                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
 848                 strncpy(cpi->hba_vid, "FreeBSD", HBA_IDLEN);
 849                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
 850                 cpi->unit_number = 0;
 851                 cpi->bus_id = 0;
 852                 cpi->base_transfer_speed = 800000;
 853                 cpi->protocol = PROTO_SCSI;
 854                 cpi->protocol_version = SCSI_REV_SPC2;
 855                 /*
 856                  * Pretend to be Fibre Channel.
 857                  */
 858                 cpi->transport = XPORT_FC;
 859                 cpi->transport_version = 0;
 860                 cpi->xport_specific.fc.wwnn = softc->wwnn;
 861                 cpi->xport_specific.fc.wwpn = softc->wwpn;
 862                 cpi->xport_specific.fc.port = softc->fe.targ_port;
 863                 cpi->xport_specific.fc.bitrate = 8 * 1000 * 1000;
 864                 cpi->ccb_h.status = CAM_REQ_CMP;
 865                 break;
 866         }
 867         default:
 868                 ccb->ccb_h.status = CAM_PROVIDE_FAIL;
 869                 printf("%s: unsupported CCB type %#x\n", __func__,
 870                        ccb->ccb_h.func_code);
 871                 xpt_done(ccb);
 872                 break;
 873         }
 874 }
 875
 876 static void
 877 cfcs_async(void *callback_arg, uint32_t code, struct cam_path *path, void *arg)
 878 {
 879
 880 }