sys/cam/ata/ata_pmp.c

   1 /*-
   2  * Copyright (c) 2009 Alexander Motin <mav@FreeBSD.org>
   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, immediately at the beginning of the file.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 #include <sys/param.h>
  31
  32 #ifdef _KERNEL
  33 #include <sys/systm.h>
  34 #include <sys/kernel.h>
  35 #include <sys/bio.h>
  36 #include <sys/sysctl.h>
  37 #include <sys/taskqueue.h>
  38 #include <sys/lock.h>
  39 #include <sys/mutex.h>
  40 #include <sys/conf.h>
  41 #include <sys/devicestat.h>
  42 #include <sys/eventhandler.h>
  43 #include <sys/malloc.h>
  44 #include <sys/cons.h>
  45 #include <geom/geom_disk.h>
  46 #endif /* _KERNEL */
  47
  48 #ifndef _KERNEL
  49 #include <stdio.h>
  50 #include <string.h>
  51 #endif /* _KERNEL */
  52
  53 #include <cam/cam.h>
  54 #include <cam/cam_ccb.h>
  55 #include <cam/cam_periph.h>
  56 #include <cam/cam_xpt_periph.h>
  57 #include <cam/cam_xpt_internal.h>
  58 #include <cam/cam_sim.h>
  59
  60 #include <cam/ata/ata_all.h>
  61
  62 #ifdef _KERNEL
  63
  64 typedef enum {
  65         PMP_STATE_NORMAL,
  66         PMP_STATE_PORTS,
  67         PMP_STATE_PRECONFIG,
  68         PMP_STATE_RESET,
  69         PMP_STATE_CONNECT,
  70         PMP_STATE_CHECK,
  71         PMP_STATE_CLEAR,
  72         PMP_STATE_CONFIG,
  73         PMP_STATE_SCAN
  74 } pmp_state;
  75
  76 typedef enum {
  77         PMP_FLAG_SCTX_INIT      = 0x200
  78 } pmp_flags;
  79
  80 typedef enum {
  81         PMP_CCB_PROBE           = 0x01,
  82 } pmp_ccb_state;
  83
  84 /* Offsets into our private area for storing information */
  85 #define ccb_state       ppriv_field0
  86 #define ccb_bp          ppriv_ptr1
  87
  88 struct pmp_softc {
  89         SLIST_ENTRY(pmp_softc)  links;
  90         pmp_state               state;
  91         pmp_flags               flags;
  92         uint32_t                pm_pid;
  93         uint32_t                pm_prv;
  94         int                     pm_ports;
  95         int                     pm_step;
  96         int                     pm_try;
  97         int                     found;
  98         int                     reset;
  99         int                     frozen;
 100         int                     restart;
 101         int                     events;
 102 #define PMP_EV_RESET    1
 103 #define PMP_EV_RESCAN   2
 104         u_int                   caps;
 105         struct task             sysctl_task;
 106         struct sysctl_ctx_list  sysctl_ctx;
 107         struct sysctl_oid       *sysctl_tree;
 108 };
 109
 110 static  periph_init_t   pmpinit;
 111 static  void            pmpasync(void *callback_arg, u_int32_t code,
 112                                 struct cam_path *path, void *arg);
 113 static  void            pmpsysctlinit(void *context, int pending);
 114 static  periph_ctor_t   pmpregister;
 115 static  periph_dtor_t   pmpcleanup;
 116 static  periph_start_t  pmpstart;
 117 static  periph_oninv_t  pmponinvalidate;
 118 static  void            pmpdone(struct cam_periph *periph,
 119                                union ccb *done_ccb);
 120
 121 #ifndef PMP_DEFAULT_TIMEOUT
 122 #define PMP_DEFAULT_TIMEOUT 30  /* Timeout in seconds */
 123 #endif
 124
 125 #ifndef PMP_DEFAULT_RETRY
 126 #define PMP_DEFAULT_RETRY       1
 127 #endif
 128
 129 static int pmp_retry_count = PMP_DEFAULT_RETRY;
 130 static int pmp_default_timeout = PMP_DEFAULT_TIMEOUT;
 131
 132 SYSCTL_NODE(_kern_cam, OID_AUTO, pmp, CTLFLAG_RD, 0,
 133             "CAM Direct Access Disk driver");
 134 SYSCTL_INT(_kern_cam_pmp, OID_AUTO, retry_count, CTLFLAG_RW,
 135            &pmp_retry_count, 0, "Normal I/O retry count");
 136 TUNABLE_INT("kern.cam.pmp.retry_count", &pmp_retry_count);
 137 SYSCTL_INT(_kern_cam_pmp, OID_AUTO, default_timeout, CTLFLAG_RW,
 138            &pmp_default_timeout, 0, "Normal I/O timeout (in seconds)");
 139 TUNABLE_INT("kern.cam.pmp.default_timeout", &pmp_default_timeout);
 140
 141 static struct periph_driver pmpdriver =
 142 {
 143         pmpinit, "pmp",
 144         TAILQ_HEAD_INITIALIZER(pmpdriver.units), /* generation */ 0,
 145         CAM_PERIPH_DRV_EARLY
 146 };
 147
 148 PERIPHDRIVER_DECLARE(pmp, pmpdriver);
 149
 150 MALLOC_DEFINE(M_ATPMP, "ata_pmp", "ata_pmp buffers");
 151
 152 static void
 153 pmpinit(void)
 154 {
 155         cam_status status;
 156
 157         /*
 158          * Install a global async callback.  This callback will
 159          * receive async callbacks like "new device found".
 160          */
 161         status = xpt_register_async(AC_FOUND_DEVICE, pmpasync, NULL, NULL);
 162
 163         if (status != CAM_REQ_CMP) {
 164                 printf("pmp: Failed to attach master async callback "
 165                        "due to status 0x%x!\n", status);
 166         }
 167 }
 168
 169 static void
 170 pmpfreeze(struct cam_periph *periph, int mask)
 171 {
 172         struct pmp_softc *softc = (struct pmp_softc *)periph->softc;
 173         struct cam_path *dpath;
 174         int i;
 175
 176         mask &= ~softc->frozen;
 177         for (i = 0; i < 15; i++) {
 178                 if ((mask & (1 << i)) == 0)
 179                         continue;
 180                 if (xpt_create_path(&dpath, periph,
 181                     xpt_path_path_id(periph->path),
 182                     i, 0) == CAM_REQ_CMP) {
 183                         softc->frozen |= (1 << i);
 184                         xpt_acquire_device(dpath->device);
 185                         cam_freeze_devq_arg(dpath,
 186                             RELSIM_RELEASE_RUNLEVEL, CAM_RL_BUS + 1);
 187                         xpt_free_path(dpath);
 188                 }
 189         }
 190 }
 191
 192 static void
 193 pmprelease(struct cam_periph *periph, int mask)
 194 {
 195         struct pmp_softc *softc = (struct pmp_softc *)periph->softc;
 196         struct cam_path *dpath;
 197         int i;
 198
 199         mask &= softc->frozen;
 200         for (i = 0; i < 15; i++) {
 201                 if ((mask & (1 << i)) == 0)
 202                         continue;
 203                 if (xpt_create_path(&dpath, periph,
 204                     xpt_path_path_id(periph->path),
 205                     i, 0) == CAM_REQ_CMP) {
 206                         softc->frozen &= ~(1 << i);
 207                         cam_release_devq(dpath,
 208                             RELSIM_RELEASE_RUNLEVEL, 0, CAM_RL_BUS + 1, FALSE);
 209                         xpt_release_device(dpath->device);
 210                         xpt_free_path(dpath);
 211                 }
 212         }
 213 }
 214
 215 static void
 216 pmponinvalidate(struct cam_periph *periph)
 217 {
 218         struct cam_path *dpath;
 219         int i;
 220
 221         /*
 222          * De-register any async callbacks.
 223          */
 224         xpt_register_async(0, pmpasync, periph, periph->path);
 225
 226         for (i = 0; i < 15; i++) {
 227                 if (xpt_create_path(&dpath, periph,
 228                     xpt_path_path_id(periph->path),
 229                     i, 0) == CAM_REQ_CMP) {
 230                         xpt_async(AC_LOST_DEVICE, dpath, NULL);
 231                         xpt_free_path(dpath);
 232                 }
 233         }
 234         pmprelease(periph, -1);
 235         xpt_print(periph->path, "lost device\n");
 236 }
 237
 238 static void
 239 pmpcleanup(struct cam_periph *periph)
 240 {
 241         struct pmp_softc *softc;
 242
 243         softc = (struct pmp_softc *)periph->softc;
 244
 245         xpt_print(periph->path, "removing device entry\n");
 246         cam_periph_unlock(periph);
 247
 248         /*
 249          * If we can't free the sysctl tree, oh well...
 250          */
 251         if ((softc->flags & PMP_FLAG_SCTX_INIT) != 0
 252             && sysctl_ctx_free(&softc->sysctl_ctx) != 0) {
 253                 xpt_print(periph->path, "can't remove sysctl context\n");
 254         }
 255
 256         free(softc, M_DEVBUF);
 257         cam_periph_lock(periph);
 258 }
 259
 260 static void
 261 pmpasync(void *callback_arg, u_int32_t code,
 262         struct cam_path *path, void *arg)
 263 {
 264         struct cam_periph *periph;
 265         struct pmp_softc *softc;
 266
 267         periph = (struct cam_periph *)callback_arg;
 268         switch (code) {
 269         case AC_FOUND_DEVICE:
 270         {
 271                 struct ccb_getdev *cgd;
 272                 cam_status status;
 273
 274                 cgd = (struct ccb_getdev *)arg;
 275                 if (cgd == NULL)
 276                         break;
 277
 278                 if (cgd->protocol != PROTO_SATAPM)
 279                         break;
 280
 281                 /*
 282                  * Allocate a peripheral instance for
 283                  * this device and start the probe
 284                  * process.
 285                  */
 286                 status = cam_periph_alloc(pmpregister, pmponinvalidate,
 287                                           pmpcleanup, pmpstart,
 288                                           "pmp", CAM_PERIPH_BIO,
 289                                           cgd->ccb_h.path, pmpasync,
 290                                           AC_FOUND_DEVICE, cgd);
 291
 292                 if (status != CAM_REQ_CMP
 293                  && status != CAM_REQ_INPROG)
 294                         printf("pmpasync: Unable to attach to new device "
 295                                 "due to status 0x%x\n", status);
 296                 break;
 297         }
 298         case AC_SCSI_AEN:
 299         case AC_SENT_BDR:
 300         case AC_BUS_RESET:
 301                 softc = (struct pmp_softc *)periph->softc;
 302                 cam_periph_async(periph, code, path, arg);
 303                 if (code == AC_SCSI_AEN)
 304                         softc->events |= PMP_EV_RESCAN;
 305                 else
 306                         softc->events |= PMP_EV_RESET;
 307                 if (code == AC_SCSI_AEN && softc->state != PMP_STATE_NORMAL)
 308                         break;
 309                 xpt_hold_boot();
 310                 pmpfreeze(periph, softc->found);
 311                 if (code == AC_SENT_BDR || code == AC_BUS_RESET)
 312                         softc->found = 0; /* We have to reset everything. */
 313                 if (softc->state == PMP_STATE_NORMAL) {
 314                         softc->state = PMP_STATE_PRECONFIG;
 315                         cam_periph_acquire(periph);
 316                         xpt_schedule(periph, CAM_PRIORITY_DEV);
 317                 } else
 318                         softc->restart = 1;
 319                 break;
 320         default:
 321                 cam_periph_async(periph, code, path, arg);
 322                 break;
 323         }
 324 }
 325
 326 static void
 327 pmpsysctlinit(void *context, int pending)
 328 {
 329         struct cam_periph *periph;
 330         struct pmp_softc *softc;
 331         char tmpstr[80], tmpstr2[80];
 332
 333         periph = (struct cam_periph *)context;
 334         if (cam_periph_acquire(periph) != CAM_REQ_CMP)
 335                 return;
 336
 337         softc = (struct pmp_softc *)periph->softc;
 338         snprintf(tmpstr, sizeof(tmpstr), "CAM PMP unit %d", periph->unit_number);
 339         snprintf(tmpstr2, sizeof(tmpstr2), "%d", periph->unit_number);
 340
 341         sysctl_ctx_init(&softc->sysctl_ctx);
 342         softc->flags |= PMP_FLAG_SCTX_INIT;
 343         softc->sysctl_tree = SYSCTL_ADD_NODE(&softc->sysctl_ctx,
 344                 SYSCTL_STATIC_CHILDREN(_kern_cam_pmp), OID_AUTO, tmpstr2,
 345                 CTLFLAG_RD, 0, tmpstr);
 346         if (softc->sysctl_tree == NULL) {
 347                 printf("pmpsysctlinit: unable to allocate sysctl tree\n");
 348                 cam_periph_release(periph);
 349                 return;
 350         }
 351
 352         cam_periph_release(periph);
 353 }
 354
 355 static cam_status
 356 pmpregister(struct cam_periph *periph, void *arg)
 357 {
 358         struct pmp_softc *softc;
 359         struct ccb_getdev *cgd;
 360
 361         cgd = (struct ccb_getdev *)arg;
 362         if (periph == NULL) {
 363                 printf("pmpregister: periph was NULL!!\n");
 364                 return(CAM_REQ_CMP_ERR);
 365         }
 366
 367         if (cgd == NULL) {
 368                 printf("pmpregister: no getdev CCB, can't register device\n");
 369                 return(CAM_REQ_CMP_ERR);
 370         }
 371
 372         softc = (struct pmp_softc *)malloc(sizeof(*softc), M_DEVBUF,
 373             M_NOWAIT|M_ZERO);
 374
 375         if (softc == NULL) {
 376                 printf("pmpregister: Unable to probe new device. "
 377                        "Unable to allocate softc\n");
 378                 return(CAM_REQ_CMP_ERR);
 379         }
 380         periph->softc = softc;
 381
 382         softc->pm_pid = ((uint32_t *)&cgd->ident_data)[0];
 383         softc->pm_prv = ((uint32_t *)&cgd->ident_data)[1];
 384         TASK_INIT(&softc->sysctl_task, 0, pmpsysctlinit, periph);
 385
 386         xpt_announce_periph(periph, NULL);
 387
 388         /*
 389          * Add async callbacks for bus reset and
 390          * bus device reset calls.  I don't bother
 391          * checking if this fails as, in most cases,
 392          * the system will function just fine without
 393          * them and the only alternative would be to
 394          * not attach the device on failure.
 395          */
 396         xpt_register_async(AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE |
 397                 AC_SCSI_AEN, pmpasync, periph, periph->path);
 398
 399         /*
 400          * Take an exclusive refcount on the periph while pmpstart is called
 401          * to finish the probe.  The reference will be dropped in pmpdone at
 402          * the end of probe.
 403          */
 404         (void)cam_periph_acquire(periph);
 405         xpt_hold_boot();
 406         softc->state = PMP_STATE_PORTS;
 407         softc->events = PMP_EV_RESCAN;
 408         xpt_schedule(periph, CAM_PRIORITY_DEV);
 409
 410         return(CAM_REQ_CMP);
 411 }
 412
 413 static void
 414 pmpstart(struct cam_periph *periph, union ccb *start_ccb)
 415 {
 416         struct ccb_trans_settings cts;
 417         struct ccb_ataio *ataio;
 418         struct pmp_softc *softc;
 419         struct cam_path *dpath;
 420         int revision = 0;
 421
 422         softc = (struct pmp_softc *)periph->softc;
 423         ataio = &start_ccb->ataio;
 424
 425         if (softc->restart) {
 426                 softc->restart = 0;
 427                 softc->state = min(softc->state, PMP_STATE_PRECONFIG);
 428         }
 429         /* Fetch user wanted device speed. */
 430         if (softc->state == PMP_STATE_RESET ||
 431             softc->state == PMP_STATE_CONNECT) {
 432                 if (xpt_create_path(&dpath, periph,
 433                     xpt_path_path_id(periph->path),
 434                     softc->pm_step, 0) == CAM_REQ_CMP) {
 435                         bzero(&cts, sizeof(cts));
 436                         xpt_setup_ccb(&cts.ccb_h, dpath, CAM_PRIORITY_NONE);
 437                         cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
 438                         cts.type = CTS_TYPE_USER_SETTINGS;
 439                         xpt_action((union ccb *)&cts);
 440                         if (cts.xport_specific.sata.valid & CTS_SATA_VALID_REVISION)
 441                                 revision = cts.xport_specific.sata.revision;
 442                         xpt_free_path(dpath);
 443                 }
 444         }
 445         switch (softc->state) {
 446         case PMP_STATE_PORTS:
 447                 cam_fill_ataio(ataio,
 448                       pmp_retry_count,
 449                       pmpdone,
 450                       /*flags*/CAM_DIR_NONE,
 451                       0,
 452                       /*data_ptr*/NULL,
 453                       /*dxfer_len*/0,
 454                       pmp_default_timeout * 1000);
 455                 ata_pm_read_cmd(ataio, 2, 15);
 456                 break;
 457         case PMP_STATE_PRECONFIG:
 458                 /* Get/update host SATA capabilities. */
 459                 bzero(&cts, sizeof(cts));
 460                 xpt_setup_ccb(&cts.ccb_h, periph->path, CAM_PRIORITY_NONE);
 461                 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
 462                 cts.type = CTS_TYPE_CURRENT_SETTINGS;
 463                 xpt_action((union ccb *)&cts);
 464                 if (cts.xport_specific.sata.valid & CTS_SATA_VALID_CAPS)
 465                         softc->caps = cts.xport_specific.sata.caps;
 466                 cam_fill_ataio(ataio,
 467                       pmp_retry_count,
 468                       pmpdone,
 469                       /*flags*/CAM_DIR_NONE,
 470                       0,
 471                       /*data_ptr*/NULL,
 472                       /*dxfer_len*/0,
 473                       pmp_default_timeout * 1000);
 474                 ata_pm_write_cmd(ataio, 0x60, 15, 0x0);
 475                 break;
 476         case PMP_STATE_RESET:
 477                 cam_fill_ataio(ataio,
 478                       pmp_retry_count,
 479                       pmpdone,
 480                       /*flags*/CAM_DIR_NONE,
 481                       0,
 482                       /*data_ptr*/NULL,
 483                       /*dxfer_len*/0,
 484                       pmp_default_timeout * 1000);
 485                 ata_pm_write_cmd(ataio, 2, softc->pm_step,
 486                     (revision << 4) |
 487                     ((softc->found & (1 << softc->pm_step)) ? 0 : 1));
 488                 break;
 489         case PMP_STATE_CONNECT:
 490                 cam_fill_ataio(ataio,
 491                       pmp_retry_count,
 492                       pmpdone,
 493                       /*flags*/CAM_DIR_NONE,
 494                       0,
 495                       /*data_ptr*/NULL,
 496                       /*dxfer_len*/0,
 497                       pmp_default_timeout * 1000);
 498                 ata_pm_write_cmd(ataio, 2, softc->pm_step,
 499                     (revision << 4));
 500                 break;
 501         case PMP_STATE_CHECK:
 502                 cam_fill_ataio(ataio,
 503                       pmp_retry_count,
 504                       pmpdone,
 505                       /*flags*/CAM_DIR_NONE,
 506                       0,
 507                       /*data_ptr*/NULL,
 508                       /*dxfer_len*/0,
 509                       pmp_default_timeout * 1000);
 510                 ata_pm_read_cmd(ataio, 0, softc->pm_step);
 511                 break;
 512         case PMP_STATE_CLEAR:
 513                 softc->reset = 0;
 514                 cam_fill_ataio(ataio,
 515                       pmp_retry_count,
 516                       pmpdone,
 517                       /*flags*/CAM_DIR_NONE,
 518                       0,
 519                       /*data_ptr*/NULL,
 520                       /*dxfer_len*/0,
 521                       pmp_default_timeout * 1000);
 522                 ata_pm_write_cmd(ataio, 1, softc->pm_step, 0xFFFFFFFF);
 523                 break;
 524         case PMP_STATE_CONFIG:
 525                 cam_fill_ataio(ataio,
 526                       pmp_retry_count,
 527                       pmpdone,
 528                       /*flags*/CAM_DIR_NONE,
 529                       0,
 530                       /*data_ptr*/NULL,
 531                       /*dxfer_len*/0,
 532                       pmp_default_timeout * 1000);
 533                 ata_pm_write_cmd(ataio, 0x60, 15, 0x07 |
 534                     ((softc->caps & CTS_SATA_CAPS_H_AN) ? 0x08 : 0));
 535                 break;
 536         default:
 537                 break;
 538         }
 539         xpt_action(start_ccb);
 540 }
 541
 542 static void
 543 pmpdone(struct cam_periph *periph, union ccb *done_ccb)
 544 {
 545         struct ccb_trans_settings cts;
 546         struct pmp_softc *softc;
 547         struct ccb_ataio *ataio;
 548         struct cam_path *dpath;
 549         u_int32_t  priority, res;
 550         int i;
 551
 552         softc = (struct pmp_softc *)periph->softc;
 553         ataio = &done_ccb->ataio;
 554
 555         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("pmpdone\n"));
 556
 557         priority = done_ccb->ccb_h.pinfo.priority;
 558
 559         if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
 560                 if (cam_periph_error(done_ccb, 0, 0, NULL) == ERESTART) {
 561                         return;
 562                 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
 563                         cam_release_devq(done_ccb->ccb_h.path,
 564                             /*relsim_flags*/0,
 565                             /*reduction*/0,
 566                             /*timeout*/0,
 567                             /*getcount_only*/0);
 568                 }
 569                 goto done;
 570         }
 571
 572         if (softc->restart) {
 573                 softc->restart = 0;
 574                 xpt_release_ccb(done_ccb);
 575                 softc->state = min(softc->state, PMP_STATE_PRECONFIG);
 576                 xpt_schedule(periph, priority);
 577                 return;
 578         }
 579
 580         switch (softc->state) {
 581         case PMP_STATE_PORTS:
 582                 softc->pm_ports = (ataio->res.lba_high << 24) +
 583                     (ataio->res.lba_mid << 16) +
 584                     (ataio->res.lba_low << 8) +
 585                     ataio->res.sector_count;
 586                 /* This PMP declares 6 ports, while only 5 of them are real.
 587                  * Port 5 is enclosure management bridge port, which has implementation
 588                  * problems, causing probe faults. Hide it for now. */
 589                 if (softc->pm_pid == 0x37261095 && softc->pm_ports == 6)
 590                         softc->pm_ports = 5;
 591                 /* This PMP declares 7 ports, while only 5 of them are real.
 592                  * Port 5 is some fake "Config  Disk" with 640 sectors size,
 593                  * port 6 is enclosure management bridge port.
 594                  * Both fake ports has implementation problems, causing
 595                  * probe faults. Hide them for now. */
 596                 if (softc->pm_pid == 0x47261095 && softc->pm_ports == 7)
 597                         softc->pm_ports = 5;
 598                 /* These PMPs declare one more port then actually have,
 599                  * for configuration purposes. Hide it for now. */
 600                 if (softc->pm_pid == 0x57231095 || softc->pm_pid == 0x57331095 ||
 601                     softc->pm_pid == 0x57341095 || softc->pm_pid == 0x57441095)
 602                         softc->pm_ports--;
 603                 printf("%s%d: %d fan-out ports\n",
 604                     periph->periph_name, periph->unit_number,
 605                     softc->pm_ports);
 606                 softc->state = PMP_STATE_PRECONFIG;
 607                 xpt_release_ccb(done_ccb);
 608                 xpt_schedule(periph, priority);
 609                 return;
 610         case PMP_STATE_PRECONFIG:
 611                 softc->pm_step = 0;
 612                 softc->state = PMP_STATE_RESET;
 613                 softc->reset |= ~softc->found;
 614                 xpt_release_ccb(done_ccb);
 615                 xpt_schedule(periph, priority);
 616                 return;
 617         case PMP_STATE_RESET:
 618                 softc->pm_step++;
 619                 if (softc->pm_step >= softc->pm_ports) {
 620                         softc->pm_step = 0;
 621                         cam_freeze_devq(periph->path);
 622                         cam_release_devq(periph->path,
 623                             RELSIM_RELEASE_AFTER_TIMEOUT,
 624                             /*reduction*/0,
 625                             /*timeout*/5,
 626                             /*getcount_only*/0);
 627                         softc->state = PMP_STATE_CONNECT;
 628                 }
 629                 xpt_release_ccb(done_ccb);
 630                 xpt_schedule(periph, priority);
 631                 return;
 632         case PMP_STATE_CONNECT:
 633                 softc->pm_step++;
 634                 if (softc->pm_step >= softc->pm_ports) {
 635                         softc->pm_step = 0;
 636                         softc->pm_try = 0;
 637                         cam_freeze_devq(periph->path);
 638                         cam_release_devq(periph->path,
 639                             RELSIM_RELEASE_AFTER_TIMEOUT,
 640                             /*reduction*/0,
 641                             /*timeout*/10,
 642                             /*getcount_only*/0);
 643                         softc->state = PMP_STATE_CHECK;
 644                 }
 645                 xpt_release_ccb(done_ccb);
 646                 xpt_schedule(periph, priority);
 647                 return;
 648         case PMP_STATE_CHECK:
 649                 res = (ataio->res.lba_high << 24) +
 650                     (ataio->res.lba_mid << 16) +
 651                     (ataio->res.lba_low << 8) +
 652                     ataio->res.sector_count;
 653                 if (((res & 0xf0f) == 0x103 && (res & 0x0f0) != 0) ||
 654                     (res & 0x600) != 0) {
 655                         if (bootverbose) {
 656                                 printf("%s%d: port %d status: %08x\n",
 657                                     periph->periph_name, periph->unit_number,
 658                                     softc->pm_step, res);
 659                         }
 660                         /* Report device speed if it is online. */
 661                         if ((res & 0xf0f) == 0x103 &&
 662                             xpt_create_path(&dpath, periph,
 663                             xpt_path_path_id(periph->path),
 664                             softc->pm_step, 0) == CAM_REQ_CMP) {
 665                                 bzero(&cts, sizeof(cts));
 666                                 xpt_setup_ccb(&cts.ccb_h, dpath, CAM_PRIORITY_NONE);
 667                                 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
 668                                 cts.type = CTS_TYPE_CURRENT_SETTINGS;
 669                                 cts.xport_specific.sata.revision = (res & 0x0f0) >> 4;
 670                                 cts.xport_specific.sata.valid = CTS_SATA_VALID_REVISION;
 671                                 cts.xport_specific.sata.caps = softc->caps &
 672                                     (CTS_SATA_CAPS_H_PMREQ |
 673                                      CTS_SATA_CAPS_H_DMAAA |
 674                                      CTS_SATA_CAPS_H_AN);
 675                                 cts.xport_specific.sata.valid |= CTS_SATA_VALID_CAPS;
 676                                 xpt_action((union ccb *)&cts);
 677                                 xpt_free_path(dpath);
 678                         }
 679                         softc->found |= (1 << softc->pm_step);
 680                         softc->pm_step++;
 681                 } else {
 682                         if (softc->pm_try < 10) {
 683                                 cam_freeze_devq(periph->path);
 684                                 cam_release_devq(periph->path,
 685                                     RELSIM_RELEASE_AFTER_TIMEOUT,
 686                                     /*reduction*/0,
 687                                     /*timeout*/10,
 688                                     /*getcount_only*/0);
 689                                 softc->pm_try++;
 690                         } else {
 691                                 if (bootverbose) {
 692                                         printf("%s%d: port %d status: %08x\n",
 693                                             periph->periph_name, periph->unit_number,
 694                                             softc->pm_step, res);
 695                                 }
 696                                 softc->found &= ~(1 << softc->pm_step);
 697                                 if (xpt_create_path(&dpath, periph,
 698                                     done_ccb->ccb_h.path_id,
 699                                     softc->pm_step, 0) == CAM_REQ_CMP) {
 700                                         xpt_async(AC_LOST_DEVICE, dpath, NULL);
 701                                         xpt_free_path(dpath);
 702                                 }
 703                                 softc->pm_step++;
 704                         }
 705                 }
 706                 if (softc->pm_step >= softc->pm_ports) {
 707                         if (softc->reset & softc->found) {
 708                                 cam_freeze_devq(periph->path);
 709                                 cam_release_devq(periph->path,
 710                                     RELSIM_RELEASE_AFTER_TIMEOUT,
 711                                     /*reduction*/0,
 712                                     /*timeout*/1000,
 713                                     /*getcount_only*/0);
 714                         }
 715                         softc->state = PMP_STATE_CLEAR;
 716                         softc->pm_step = 0;
 717                 }
 718                 xpt_release_ccb(done_ccb);
 719                 xpt_schedule(periph, priority);
 720                 return;
 721         case PMP_STATE_CLEAR:
 722                 softc->pm_step++;
 723                 if (softc->pm_step >= softc->pm_ports) {
 724                         softc->state = PMP_STATE_CONFIG;
 725                         softc->pm_step = 0;
 726                 }
 727                 xpt_release_ccb(done_ccb);
 728                 xpt_schedule(periph, priority);
 729                 return;
 730         case PMP_STATE_CONFIG:
 731                 for (i = 0; i < softc->pm_ports; i++) {
 732                         union ccb *ccb;
 733
 734                         if ((softc->found & (1 << i)) == 0)
 735                                 continue;
 736                         if (xpt_create_path(&dpath, periph,
 737                             xpt_path_path_id(periph->path),
 738                             i, 0) != CAM_REQ_CMP) {
 739                                 printf("pmpdone: xpt_create_path failed\n");
 740                                 continue;
 741                         }
 742                         /* If we did hard reset to this device, inform XPT. */
 743                         if ((softc->reset & softc->found & (1 << i)) != 0)
 744                                 xpt_async(AC_SENT_BDR, dpath, NULL);
 745                         /* If rescan requested, scan this device. */
 746                         if (softc->events & PMP_EV_RESCAN) {
 747                                 ccb = xpt_alloc_ccb_nowait();
 748                                 if (ccb == NULL) {
 749                                         xpt_free_path(dpath);
 750                                         goto done;
 751                                 }
 752                                 xpt_setup_ccb(&ccb->ccb_h, dpath, CAM_PRIORITY_XPT);
 753                                 xpt_rescan(ccb);
 754                         } else
 755                                 xpt_free_path(dpath);
 756                 }
 757                 break;
 758         default:
 759                 break;
 760         }
 761 done:
 762         xpt_release_ccb(done_ccb);
 763         softc->state = PMP_STATE_NORMAL;
 764         softc->events = 0;
 765         xpt_release_boot();
 766         pmprelease(periph, -1);
 767         cam_periph_release_locked(periph);
 768 }
 769
 770 #endif /* _KERNEL */