sys/dev/disk/ahci/ahci_cam.c

   1 /*
   2  * Copyright (c) 2009 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@backplane.com>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *
  35  * Copyright (c) 2007 David Gwynne <dlg@openbsd.org>
  36  *
  37  * Permission to use, copy, modify, and distribute this software for any
  38  * purpose with or without fee is hereby granted, provided that the above
  39  * copyright notice and this permission notice appear in all copies.
  40  *
  41  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  42  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  43  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  44  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  45  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  46  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  47  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  48  *
  49  * $OpenBSD: atascsi.c,v 1.64 2009/02/16 21:19:06 miod Exp $
  50  * $DragonFly$
  51  */
  52 /*
  53  * Implement each SATA port as its own SCSI bus on CAM.  This way we can
  54  * implement future port multiplier features as individual devices on the
  55  * bus.
  56  *
  57  * Much of the cdb<->xa conversion code was taken from OpenBSD, the rest
  58  * was written natively for DragonFly.
  59  */
  60
  61 #include "ahci.h"
  62
  63 static void ahci_xpt_action(struct cam_sim *sim, union ccb *ccb);
  64 static void ahci_xpt_poll(struct cam_sim *sim);
  65 static void ahci_xpt_scsi_disk_io(struct ahci_port *ap,
  66                         struct ata_port *at, union ccb *ccb);
  67 static void ahci_xpt_scsi_atapi_io(struct ahci_port *ap,
  68                         struct ata_port *at, union ccb *ccb);
  69 static void ahci_xpt_page_inquiry(struct ahci_port *ap,
  70                         struct ata_port *at, union ccb *ccb);
  71
  72 static void ahci_ata_complete_disk_rw(struct ata_xfer *xa);
  73 static void ahci_ata_complete_disk_synchronize_cache(struct ata_xfer *xa);
  74 static void ahci_atapi_complete_cmd(struct ata_xfer *xa);
  75 static void ahci_ata_dummy_sense(struct scsi_sense_data *sense_data);
  76 static void ahci_ata_atapi_sense(struct ata_fis_d2h *rfis,
  77                      struct scsi_sense_data *sense_data);
  78
  79 static int ahci_cam_probe_disk(struct ahci_port *ap, struct ata_port *at);
  80 static int ahci_cam_probe_atapi(struct ahci_port *ap, struct ata_port *at);
  81 static int ahci_set_xfer(struct ahci_port *ap, struct ata_port *atx);
  82 static void ahci_ata_dummy_done(struct ata_xfer *xa);
  83 static void ata_fix_identify(struct ata_identify *id);
  84 static void ahci_cam_rescan(struct ahci_port *ap);
  85 static void ahci_strip_string(const char **basep, int *lenp);
  86
  87 int
  88 ahci_cam_attach(struct ahci_port *ap)
  89 {
  90         struct cam_devq *devq;
  91         struct cam_sim *sim;
  92         int error;
  93         int unit;
  94
  95         /*
  96          * We want at least one ccb to be available for error processing
  97          * so don't let CAM use more then ncmds - 1.
  98          */
  99         unit = device_get_unit(ap->ap_sc->sc_dev);
 100         if (ap->ap_sc->sc_ncmds > 1)
 101                 devq = cam_simq_alloc(ap->ap_sc->sc_ncmds - 1);
 102         else
 103                 devq = cam_simq_alloc(ap->ap_sc->sc_ncmds);
 104         if (devq == NULL) {
 105                 return (ENOMEM);
 106         }
 107         sim = cam_sim_alloc(ahci_xpt_action, ahci_xpt_poll, "ahci",
 108                            (void *)ap, unit, &sim_mplock, 1, 1, devq);
 109         cam_simq_release(devq);
 110         if (sim == NULL) {
 111                 return (ENOMEM);
 112         }
 113         ap->ap_sim = sim;
 114         ahci_os_unlock_port(ap);
 115         error = xpt_bus_register(ap->ap_sim, ap->ap_num);
 116         ahci_os_lock_port(ap);
 117         if (error != CAM_SUCCESS) {
 118                 ahci_cam_detach(ap);
 119                 return (EINVAL);
 120         }
 121         ap->ap_flags |= AP_F_BUS_REGISTERED;
 122
 123         if (ap->ap_probe == ATA_PROBE_NEED_IDENT)
 124                 error = ahci_cam_probe(ap, NULL);
 125         else
 126                 error = 0;
 127         if (error) {
 128                 ahci_cam_detach(ap);
 129                 return (EIO);
 130         }
 131         ap->ap_flags |= AP_F_CAM_ATTACHED;
 132
 133         return(0);
 134 }
 135
 136 /*
 137  * The state of the port has changed.
 138  *
 139  * If at is NULL the physical port has changed state.
 140  * If at is non-NULL a particular target behind a PM has changed state.
 141  *
 142  * If found is -1 the target state must be queued to a non-interrupt context.
 143  * (only works with at == NULL).
 144  *
 145  * If found is 0 the target was removed.
 146  * If found is 1 the target was inserted.
 147  */
 148 void
 149 ahci_cam_changed(struct ahci_port *ap, struct ata_port *atx, int found)
 150 {
 151         struct cam_path *tmppath;
 152         int status;
 153         int target;
 154
 155         target = atx ? atx->at_target : CAM_TARGET_WILDCARD;
 156
 157         if (ap->ap_sim == NULL)
 158                 return;
 159         if (found == CAM_TARGET_WILDCARD) {
 160                 status = xpt_create_path(&tmppath, NULL,
 161                                          cam_sim_path(ap->ap_sim),
 162                                          target, CAM_LUN_WILDCARD);
 163                 if (status != CAM_REQ_CMP)
 164                         return;
 165                 ahci_cam_rescan(ap);
 166         } else {
 167                 status = xpt_create_path(&tmppath, NULL,
 168                                          cam_sim_path(ap->ap_sim),
 169                                          target,
 170                                          CAM_LUN_WILDCARD);
 171                 if (status != CAM_REQ_CMP)
 172                         return;
 173 #if 0
 174                 /*
 175                  * This confuses CAM
 176                  */
 177                 if (found)
 178                         xpt_async(AC_FOUND_DEVICE, tmppath, NULL);
 179                 else
 180                         xpt_async(AC_LOST_DEVICE, tmppath, NULL);
 181 #endif
 182         }
 183         xpt_free_path(tmppath);
 184 }
 185
 186 void
 187 ahci_cam_detach(struct ahci_port *ap)
 188 {
 189         int error;
 190
 191         if ((ap->ap_flags & AP_F_CAM_ATTACHED) == 0)
 192                 return;
 193         get_mplock();
 194         if (ap->ap_sim) {
 195                 xpt_freeze_simq(ap->ap_sim, 1);
 196         }
 197         if (ap->ap_flags & AP_F_BUS_REGISTERED) {
 198                 error = xpt_bus_deregister(cam_sim_path(ap->ap_sim));
 199                 KKASSERT(error == CAM_REQ_CMP);
 200                 ap->ap_flags &= ~AP_F_BUS_REGISTERED;
 201         }
 202         if (ap->ap_sim) {
 203                 cam_sim_free(ap->ap_sim);
 204                 ap->ap_sim = NULL;
 205         }
 206         rel_mplock();
 207         ap->ap_flags &= ~AP_F_CAM_ATTACHED;
 208 }
 209
 210 /*
 211  * Once the AHCI port has been attached we need to probe for a device or
 212  * devices on the port and setup various options.
 213  *
 214  * If at is NULL we are probing the direct-attached device on the port,
 215  * which may or may not be a port multiplier.
 216  */
 217 int
 218 ahci_cam_probe(struct ahci_port *ap, struct ata_port *atx)
 219 {
 220         struct ata_port *at;
 221         struct ata_xfer *xa;
 222         u_int64_t       capacity;
 223         u_int64_t       capacity_bytes;
 224         int             model_len;
 225         int             firmware_len;
 226         int             serial_len;
 227         int             error;
 228         int             devncqdepth;
 229         int             i;
 230         const char      *model_id;
 231         const char      *firmware_id;
 232         const char      *serial_id;
 233         const char      *wcstr;
 234         const char      *rastr;
 235         const char      *scstr;
 236         const char      *type;
 237
 238         error = EIO;
 239
 240         /*
 241          * Delayed CAM attachment for initial probe, sim may be NULL
 242          */
 243         if (ap->ap_sim == NULL)
 244                 return(0);
 245
 246         /*
 247          * A NULL atx indicates a probe of the directly connected device.
 248          * A non-NULL atx indicates a device connected via a port multiplier.
 249          * We need to preserve atx for calls to ahci_ata_get_xfer().
 250          *
 251          * at is always non-NULL.  For directly connected devices we supply
 252          * an (at) pointing to target 0.
 253          */
 254         if (atx == NULL) {
 255                 at = ap->ap_ata[0];     /* direct attached - device 0 */
 256                 if (ap->ap_type == ATA_PORT_T_PM) {
 257                         kprintf("%s: Found Port Multiplier\n",
 258                                 ATANAME(ap, atx));
 259                         return (0);
 260                 }
 261                 at->at_type = ap->ap_type;
 262         } else {
 263                 at = atx;
 264                 if (atx->at_type == ATA_PORT_T_PM) {
 265                         kprintf("%s: Bogus device, reducing port count to %d\n",
 266                                 ATANAME(ap, atx), atx->at_target);
 267                         if (ap->ap_pmcount > atx->at_target)
 268                                 ap->ap_pmcount = atx->at_target;
 269                         goto err;
 270                 }
 271         }
 272         if (ap->ap_type == ATA_PORT_T_NONE)
 273                 goto err;
 274         if (at->at_type == ATA_PORT_T_NONE)
 275                 goto err;
 276
 277         /*
 278          * Issue identify, saving the result
 279          */
 280         xa = ahci_ata_get_xfer(ap, atx);
 281         xa->complete = ahci_ata_dummy_done;
 282         xa->data = &at->at_identify;
 283         xa->datalen = sizeof(at->at_identify);
 284         xa->flags = ATA_F_READ | ATA_F_PIO | ATA_F_POLL;
 285         xa->fis->flags = ATA_H2D_FLAGS_CMD | at->at_target;
 286
 287         switch(at->at_type) {
 288         case ATA_PORT_T_DISK:
 289                 xa->fis->command = ATA_C_IDENTIFY;
 290                 type = "DISK";
 291                 break;
 292         case ATA_PORT_T_ATAPI:
 293                 xa->fis->command = ATA_C_ATAPI_IDENTIFY;
 294                 xa->flags |= ATA_F_AUTOSENSE;
 295                 type = "ATAPI";
 296                 break;
 297         default:
 298                 xa->fis->command = ATA_C_ATAPI_IDENTIFY;
 299                 type = "UNKNOWN(ATAPI?)";
 300                 break;
 301         }
 302         xa->fis->features = 0;
 303         xa->fis->device = 0;
 304         xa->timeout = 1000;
 305
 306         if (ahci_ata_cmd(xa) != ATA_S_COMPLETE) {
 307                 kprintf("%s: Detected %s device but unable to IDENTIFY\n",
 308                         ATANAME(ap, atx), type);
 309                 ahci_ata_put_xfer(xa);
 310                 goto err;
 311         }
 312         ahci_ata_put_xfer(xa);
 313
 314         ata_fix_identify(&at->at_identify);
 315
 316         /*
 317          * Read capacity using SATA probe info.
 318          */
 319         if (le16toh(at->at_identify.cmdset83) & 0x0400) {
 320                 /* LBA48 feature set supported */
 321                 capacity = 0;
 322                 for (i = 3; i >= 0; --i) {
 323                         capacity <<= 16;
 324                         capacity +=
 325                             le16toh(at->at_identify.addrsecxt[i]);
 326                 }
 327         } else {
 328                 capacity = le16toh(at->at_identify.addrsec[1]);
 329                 capacity <<= 16;
 330                 capacity += le16toh(at->at_identify.addrsec[0]);
 331         }
 332         if (capacity == 0)
 333                 capacity = 1024 * 1024 / 512;
 334         at->at_capacity = capacity;
 335         if (atx == NULL)
 336                 ap->ap_probe = ATA_PROBE_GOOD;
 337
 338         capacity_bytes = capacity * 512;
 339
 340         /*
 341          * Negotiate NCQ, throw away any ata_xfer's beyond the negotiated
 342          * number of slots and limit the number of CAM ccb's to one less
 343          * so we always have a slot available for recovery.
 344          *
 345          * NCQ is not used if ap_ncqdepth is 1 or the host controller does
 346          * not support it, and in that case the driver can handle extra
 347          * ccb's.
 348          *
 349          * NCQ is currently used only with direct-attached disks.  It is
 350          * not used with port multipliers or direct-attached ATAPI devices.
 351          *
 352          * Remember at least one extra CCB needs to be reserved for the
 353          * error ccb.
 354          */
 355         if ((ap->ap_sc->sc_cap & AHCI_REG_CAP_SNCQ) &&
 356             ap->ap_type == ATA_PORT_T_DISK &&
 357             (le16toh(at->at_identify.satacap) & (1 << 8))) {
 358                 at->at_ncqdepth = (le16toh(at->at_identify.qdepth) & 0x1F) + 1;
 359                 devncqdepth = at->at_ncqdepth;
 360                 if (at->at_ncqdepth > ap->ap_sc->sc_ncmds)
 361                         at->at_ncqdepth = ap->ap_sc->sc_ncmds;
 362                 if (at->at_ncqdepth > 1) {
 363                         for (i = 0; i < ap->ap_sc->sc_ncmds; ++i) {
 364                                 xa = ahci_ata_get_xfer(ap, atx);
 365                                 if (xa->tag < at->at_ncqdepth) {
 366                                         xa->state = ATA_S_COMPLETE;
 367                                         ahci_ata_put_xfer(xa);
 368                                 }
 369                         }
 370                         if (at->at_ncqdepth >= ap->ap_sc->sc_ncmds) {
 371                                 cam_devq_resize(ap->ap_sim->devq,
 372                                                 at->at_ncqdepth - 1);
 373                         }
 374                 }
 375         } else {
 376                 devncqdepth = 0;
 377         }
 378
 379         model_len = sizeof(at->at_identify.model);
 380         model_id = at->at_identify.model;
 381         ahci_strip_string(&model_id, &model_len);
 382
 383         firmware_len = sizeof(at->at_identify.firmware);
 384         firmware_id = at->at_identify.firmware;
 385         ahci_strip_string(&firmware_id, &firmware_len);
 386
 387         serial_len = sizeof(at->at_identify.serial);
 388         serial_id = at->at_identify.serial;
 389         ahci_strip_string(&serial_id, &serial_len);
 390
 391         /*
 392          * Generate informatiive strings.
 393          *
 394          * NOTE: We do not automatically set write caching, lookahead,
 395          *       or the security state for ATAPI devices.
 396          */
 397         if (at->at_identify.cmdset82 & ATA_IDENTIFY_WRITECACHE) {
 398                 if (at->at_identify.features85 & ATA_IDENTIFY_WRITECACHE)
 399                         wcstr = "enabled";
 400                 else if (at->at_type == ATA_PORT_T_ATAPI)
 401                         wcstr = "disabled";
 402                 else
 403                         wcstr = "enabling";
 404         } else {
 405                     wcstr = "notsupp";
 406         }
 407
 408         if (at->at_identify.cmdset82 & ATA_IDENTIFY_LOOKAHEAD) {
 409                 if (at->at_identify.features85 & ATA_IDENTIFY_LOOKAHEAD)
 410                         rastr = "enabled";
 411                 else if (at->at_type == ATA_PORT_T_ATAPI)
 412                         rastr = "disabled";
 413                 else
 414                         rastr = "enabling";
 415         } else {
 416                     rastr = "notsupp";
 417         }
 418
 419         if (at->at_identify.cmdset82 & ATA_IDENTIFY_SECURITY) {
 420                 if (at->at_identify.securestatus & ATA_SECURE_FROZEN)
 421                         scstr = "frozen";
 422                 else if (at->at_type == ATA_PORT_T_ATAPI)
 423                         scstr = "unfrozen";
 424                 else if (AhciNoFeatures & (1 << ap->ap_num))
 425                         scstr = "<disabled>";
 426                 else
 427                         scstr = "freezing";
 428         } else {
 429                     scstr = "notsupp";
 430         }
 431
 432         kprintf("%s: Found %s \"%*.*s %*.*s\" serial=\"%*.*s\"\n"
 433                 "%s: tags=%d/%d satacap=%04x satafea=%04x NCQ=%s "
 434                 "capacity=%lld.%02dMB\n",
 435
 436                 ATANAME(ap, atx),
 437                 type,
 438                 model_len, model_len, model_id,
 439                 firmware_len, firmware_len, firmware_id,
 440                 serial_len, serial_len, serial_id,
 441
 442                 ATANAME(ap, atx),
 443                 devncqdepth, ap->ap_sc->sc_ncmds,
 444                 at->at_identify.satacap,
 445                 at->at_identify.satafsup,
 446                 (at->at_ncqdepth > 1 ? "YES" : "NO"),
 447                 (long long)capacity_bytes / (1024 * 1024),
 448                 (int)(capacity_bytes % (1024 * 1024)) * 100 / (1024 * 1024)
 449         );
 450         kprintf("%s: f85=%04x f86=%04x f87=%04x WC=%s RA=%s SEC=%s\n",
 451                 ATANAME(ap, atx),
 452                 at->at_identify.features85,
 453                 at->at_identify.features86,
 454                 at->at_identify.features87,
 455                 wcstr,
 456                 rastr,
 457                 scstr
 458         );
 459
 460         /*
 461          * Additional type-specific probing
 462          */
 463         switch(at->at_type) {
 464         case ATA_PORT_T_DISK:
 465                 error = ahci_cam_probe_disk(ap, atx);
 466                 break;
 467         case ATA_PORT_T_ATAPI:
 468                 error = ahci_cam_probe_atapi(ap, atx);
 469                 break;
 470         default:
 471                 error = EIO;
 472                 break;
 473         }
 474 err:
 475         if (error) {
 476                 at->at_probe = ATA_PROBE_FAILED;
 477                 if (atx == NULL)
 478                         ap->ap_probe = at->at_probe;
 479         } else {
 480                 at->at_probe = ATA_PROBE_GOOD;
 481                 if (atx == NULL)
 482                         ap->ap_probe = at->at_probe;
 483         }
 484         return (error);
 485 }
 486
 487 /*
 488  * DISK-specific probe after initial ident
 489  */
 490 static int
 491 ahci_cam_probe_disk(struct ahci_port *ap, struct ata_port *atx)
 492 {
 493         struct ata_port *at;
 494         struct ata_xfer *xa;
 495
 496         at = atx ? atx : ap->ap_ata[0];
 497
 498         /*
 499          * Set dummy xfer mode
 500          */
 501         ahci_set_xfer(ap, atx);
 502
 503         /*
 504          * Enable write cache if supported
 505          *
 506          * NOTE: "WD My Book" external disk devices have a very poor
 507          *       daughter board between the the ESATA and the HD.  Sending
 508          *       any ATA_C_SET_FEATURES commands will break the hardware port
 509          *       with a fatal protocol error.  However, this device also
 510          *       indicates that WRITECACHE is already on and READAHEAD is
 511          *       not supported so we avoid the issue.
 512          */
 513         if ((at->at_identify.cmdset82 & ATA_IDENTIFY_WRITECACHE) &&
 514             (at->at_identify.features85 & ATA_IDENTIFY_WRITECACHE) == 0) {
 515                 xa = ahci_ata_get_xfer(ap, atx);
 516                 xa->complete = ahci_ata_dummy_done;
 517                 xa->fis->command = ATA_C_SET_FEATURES;
 518                 xa->fis->features = ATA_SF_WRITECACHE_EN;
 519                 /* xa->fis->features = ATA_SF_LOOKAHEAD_EN; */
 520                 xa->fis->flags = ATA_H2D_FLAGS_CMD | at->at_target;
 521                 xa->fis->device = 0;
 522                 xa->flags = ATA_F_PIO | ATA_F_POLL;
 523                 xa->timeout = 1000;
 524                 xa->datalen = 0;
 525                 if (ahci_ata_cmd(xa) == ATA_S_COMPLETE)
 526                         at->at_features |= ATA_PORT_F_WCACHE;
 527                 else
 528                         kprintf("%s: Unable to enable write-caching\n",
 529                                 ATANAME(ap, atx));
 530                 ahci_ata_put_xfer(xa);
 531         }
 532
 533         /*
 534          * Enable readahead if supported
 535          */
 536         if ((at->at_identify.cmdset82 & ATA_IDENTIFY_LOOKAHEAD) &&
 537             (at->at_identify.features85 & ATA_IDENTIFY_LOOKAHEAD) == 0) {
 538                 xa = ahci_ata_get_xfer(ap, atx);
 539                 xa->complete = ahci_ata_dummy_done;
 540                 xa->fis->command = ATA_C_SET_FEATURES;
 541                 xa->fis->features = ATA_SF_LOOKAHEAD_EN;
 542                 xa->fis->flags = ATA_H2D_FLAGS_CMD | at->at_target;
 543                 xa->fis->device = 0;
 544                 xa->flags = ATA_F_PIO | ATA_F_POLL;
 545                 xa->timeout = 1000;
 546                 xa->datalen = 0;
 547                 if (ahci_ata_cmd(xa) == ATA_S_COMPLETE)
 548                         at->at_features |= ATA_PORT_F_RAHEAD;
 549                 else
 550                         kprintf("%s: Unable to enable read-ahead\n",
 551                                 ATANAME(ap, atx));
 552                 ahci_ata_put_xfer(xa);
 553         }
 554
 555         /*
 556          * FREEZE LOCK the device so malicious users can't lock it on us.
 557          * As there is no harm in issuing this to devices that don't
 558          * support the security feature set we just send it, and don't bother
 559          * checking if the device sends a command abort to tell us it doesn't
 560          * support it
 561          */
 562         if ((at->at_identify.cmdset82 & ATA_IDENTIFY_SECURITY) &&
 563             (at->at_identify.securestatus & ATA_SECURE_FROZEN) == 0 &&
 564             (AhciNoFeatures & (1 << ap->ap_num)) == 0) {
 565                 xa = ahci_ata_get_xfer(ap, atx);
 566                 xa->complete = ahci_ata_dummy_done;
 567                 xa->fis->command = ATA_C_SEC_FREEZE_LOCK;
 568                 xa->fis->flags = ATA_H2D_FLAGS_CMD | at->at_target;
 569                 xa->flags = ATA_F_PIO | ATA_F_POLL;
 570                 xa->timeout = 1000;
 571                 xa->datalen = 0;
 572                 if (ahci_ata_cmd(xa) == ATA_S_COMPLETE)
 573                         at->at_features |= ATA_PORT_F_FRZLCK;
 574                 else
 575                         kprintf("%s: Unable to set security freeze\n",
 576                                 ATANAME(ap, atx));
 577                 ahci_ata_put_xfer(xa);
 578         }
 579
 580         return (0);
 581 }
 582
 583 /*
 584  * ATAPI-specific probe after initial ident
 585  */
 586 static int
 587 ahci_cam_probe_atapi(struct ahci_port *ap, struct ata_port *atx)
 588 {
 589         ahci_set_xfer(ap, atx);
 590         return(0);
 591 }
 592
 593 /*
 594  * Setting the transfer mode is irrelevant for the SATA transport
 595  * but some (atapi) devices seem to need it anyway.  In addition
 596  * if we are running through a SATA->PATA converter for some reason
 597  * beyond my comprehension we might have to set the mode.
 598  *
 599  * We only support DMA modes for SATA attached devices, so don't bother
 600  * with legacy modes.
 601  */
 602 static int
 603 ahci_set_xfer(struct ahci_port *ap, struct ata_port *atx)
 604 {
 605         struct ata_port *at;
 606         struct ata_xfer *xa;
 607         u_int16_t mode;
 608         u_int16_t mask;
 609
 610         at = atx ? atx : ap->ap_ata[0];
 611
 612         /*
 613          * Figure out the supported UDMA mode.  Ignore other legacy modes.
 614          */
 615         mask = le16toh(at->at_identify.ultradma);
 616         if ((mask & 0xFF) == 0 || mask == 0xFFFF)
 617                 return(0);
 618         mask &= 0xFF;
 619         mode = 0x4F;
 620         while ((mask & 0x8000) == 0) {
 621                 mask <<= 1;
 622                 --mode;
 623         }
 624
 625         /*
 626          * SATA atapi devices often still report a dma mode, even though
 627          * it is irrelevant for SATA transport.  It is also possible that
 628          * we are running through a SATA->PATA converter and seeing the
 629          * PATA dma mode.
 630          *
 631          * In this case the device may require a (dummy) SETXFER to be
 632          * sent before it will work properly.
 633          */
 634         xa = ahci_ata_get_xfer(ap, atx);
 635         xa->complete = ahci_ata_dummy_done;
 636         xa->fis->command = ATA_C_SET_FEATURES;
 637         xa->fis->features = ATA_SF_SETXFER;
 638         xa->fis->flags = ATA_H2D_FLAGS_CMD | at->at_target;
 639         xa->fis->sector_count = mode;
 640         xa->flags = ATA_F_PIO | ATA_F_POLL;
 641         xa->timeout = 1000;
 642         xa->datalen = 0;
 643         if (ahci_ata_cmd(xa) != ATA_S_COMPLETE) {
 644                 kprintf("%s: Unable to set dummy xfer mode \n",
 645                         ATANAME(ap, atx));
 646         } else if (bootverbose) {
 647                 kprintf("%s: Set dummy xfer mode to %02x\n",
 648                         ATANAME(ap, atx), mode);
 649         }
 650         ahci_ata_put_xfer(xa);
 651         return(0);
 652 }
 653
 654 /*
 655  * Fix byte ordering so buffers can be accessed as
 656  * strings.
 657  */
 658 static void
 659 ata_fix_identify(struct ata_identify *id)
 660 {
 661         u_int16_t       *swap;
 662         int             i;
 663
 664         swap = (u_int16_t *)id->serial;
 665         for (i = 0; i < sizeof(id->serial) / sizeof(u_int16_t); i++)
 666                 swap[i] = bswap16(swap[i]);
 667
 668         swap = (u_int16_t *)id->firmware;
 669         for (i = 0; i < sizeof(id->firmware) / sizeof(u_int16_t); i++)
 670                 swap[i] = bswap16(swap[i]);
 671
 672         swap = (u_int16_t *)id->model;
 673         for (i = 0; i < sizeof(id->model) / sizeof(u_int16_t); i++)
 674                 swap[i] = bswap16(swap[i]);
 675 }
 676
 677 /*
 678  * Dummy done callback for xa.
 679  */
 680 static void
 681 ahci_ata_dummy_done(struct ata_xfer *xa)
 682 {
 683 }
 684
 685 /*
 686  * Use an engineering request to initiate a target scan for devices
 687  * behind a port multiplier.
 688  *
 689  * An asynchronous bus scan is used to avoid reentrancy issues.
 690  */
 691 static void
 692 ahci_cam_rescan_callback(struct cam_periph *periph, union ccb *ccb)
 693 {
 694         struct ahci_port *ap = ccb->ccb_h.sim_priv.entries[0].ptr;
 695
 696         if (ccb->ccb_h.func_code == XPT_SCAN_BUS) {
 697                 ap->ap_flags &= ~AP_F_SCAN_RUNNING;
 698                 if (ap->ap_flags & AP_F_SCAN_REQUESTED) {
 699                         ap->ap_flags &= ~AP_F_SCAN_REQUESTED;
 700                         ahci_cam_rescan(ap);
 701                 }
 702                 ap->ap_flags |= AP_F_SCAN_COMPLETED;
 703                 wakeup(&ap->ap_flags);
 704         }
 705         xpt_free_ccb(ccb);
 706 }
 707
 708 static void
 709 ahci_cam_rescan(struct ahci_port *ap)
 710 {
 711         struct cam_path *path;
 712         union ccb *ccb;
 713         int status;
 714         int i;
 715
 716         if (ap->ap_flags & AP_F_SCAN_RUNNING) {
 717                 ap->ap_flags |= AP_F_SCAN_REQUESTED;
 718                 return;
 719         }
 720         ap->ap_flags |= AP_F_SCAN_RUNNING;
 721         for (i = 0; i < AHCI_MAX_PMPORTS; ++i) {
 722                 ap->ap_ata[i]->at_features |= ATA_PORT_F_RESCAN;
 723         }
 724
 725         status = xpt_create_path(&path, xpt_periph, cam_sim_path(ap->ap_sim),
 726                                  CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
 727         if (status != CAM_REQ_CMP)
 728                 return;
 729
 730         ccb = xpt_alloc_ccb();
 731         xpt_setup_ccb(&ccb->ccb_h, path, 5);    /* 5 = low priority */
 732         ccb->ccb_h.func_code = XPT_ENG_EXEC;
 733         ccb->ccb_h.cbfcnp = ahci_cam_rescan_callback;
 734         ccb->ccb_h.sim_priv.entries[0].ptr = ap;
 735         ccb->crcn.flags = CAM_FLAG_NONE;
 736         xpt_action_async(ccb);
 737 }
 738
 739 static void
 740 ahci_xpt_rescan(struct ahci_port *ap)
 741 {
 742         struct cam_path *path;
 743         union ccb *ccb;
 744         int status;
 745
 746         status = xpt_create_path(&path, xpt_periph, cam_sim_path(ap->ap_sim),
 747                                  CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
 748         if (status != CAM_REQ_CMP)
 749                 return;
 750
 751         ccb = xpt_alloc_ccb();
 752         xpt_setup_ccb(&ccb->ccb_h, path, 5);    /* 5 = low priority */
 753         ccb->ccb_h.func_code = XPT_SCAN_BUS;
 754         ccb->ccb_h.cbfcnp = ahci_cam_rescan_callback;
 755         ccb->ccb_h.sim_priv.entries[0].ptr = ap;
 756         ccb->crcn.flags = CAM_FLAG_NONE;
 757         xpt_action_async(ccb);
 758 }
 759
 760 /*
 761  * Action function - dispatch command
 762  */
 763 static
 764 void
 765 ahci_xpt_action(struct cam_sim *sim, union ccb *ccb)
 766 {
 767         struct ahci_port *ap;
 768         struct ata_port  *at, *atx;
 769         struct ccb_hdr *ccbh;
 770         int unit;
 771
 772         /* XXX lock */
 773         ap = cam_sim_softc(sim);
 774         atx = NULL;
 775         KKASSERT(ap != NULL);
 776         ccbh = &ccb->ccb_h;
 777         unit = cam_sim_unit(sim);
 778
 779         /*
 780          * Early failure checks.  These checks do not apply to XPT_PATH_INQ,
 781          * otherwise the bus rescan will not remove the dead devices when
 782          * unplugging a PM.
 783          *
 784          * For non-wildcards we have one target (0) and one lun (0),
 785          * unless we have a port multiplier.
 786          *
 787          * A wildcard target indicates only the general bus is being
 788          * probed.
 789          *
 790          * Calculate at and atx.  at is always non-NULL.  atx is only
 791          * non-NULL for direct-attached devices.  It will be NULL for
 792          * devices behind a port multiplier.
 793          *
 794          * XXX What do we do with a LUN wildcard?
 795          */
 796         if (ccbh->target_id != CAM_TARGET_WILDCARD &&
 797             ccbh->func_code != XPT_PATH_INQ) {
 798                 if (ap->ap_type == ATA_PORT_T_NONE) {
 799                         ccbh->status = CAM_DEV_NOT_THERE;
 800                         xpt_done(ccb);
 801                         return;
 802                 }
 803                 if (ccbh->target_id < 0 || ccbh->target_id >= ap->ap_pmcount) {
 804                         ccbh->status = CAM_DEV_NOT_THERE;
 805                         xpt_done(ccb);
 806                         return;
 807                 }
 808                 at = ap->ap_ata[ccbh->target_id];
 809                 if (ap->ap_type == ATA_PORT_T_PM)
 810                         atx = at;
 811
 812                 if (ccbh->target_lun != CAM_LUN_WILDCARD && ccbh->target_lun) {
 813                         ccbh->status = CAM_DEV_NOT_THERE;
 814                         xpt_done(ccb);
 815                         return;
 816                 }
 817         } else {
 818                 at = ap->ap_ata[0];
 819         }
 820
 821         /*
 822          * Switch on the meta XPT command
 823          */
 824         switch(ccbh->func_code) {
 825         case XPT_ENG_EXEC:
 826                 /*
 827                  * This routine is called after a port multiplier has been
 828                  * probed.
 829                  */
 830                 ccbh->status = CAM_REQ_CMP;
 831                 ahci_os_lock_port(ap);
 832                 ahci_port_state_machine(ap, 0);
 833                 ahci_os_unlock_port(ap);
 834                 xpt_done(ccb);
 835                 ahci_xpt_rescan(ap);
 836                 break;
 837         case XPT_PATH_INQ:
 838                 /*
 839                  * This command always succeeds, otherwise the bus scan
 840                  * will not detach dead devices.
 841                  */
 842                 ccb->cpi.version_num = 1;
 843                 ccb->cpi.hba_inquiry = 0;
 844                 ccb->cpi.target_sprt = 0;
 845                 ccb->cpi.hba_misc = PIM_SEQSCAN;
 846                 ccb->cpi.hba_eng_cnt = 0;
 847                 bzero(ccb->cpi.vuhba_flags, sizeof(ccb->cpi.vuhba_flags));
 848                 ccb->cpi.max_target = AHCI_MAX_PMPORTS - 1;
 849                 ccb->cpi.max_lun = 0;
 850                 ccb->cpi.async_flags = 0;
 851                 ccb->cpi.hpath_id = 0;
 852                 ccb->cpi.initiator_id = AHCI_MAX_PMPORTS - 1;
 853                 ccb->cpi.unit_number = cam_sim_unit(sim);
 854                 ccb->cpi.bus_id = cam_sim_bus(sim);
 855                 ccb->cpi.base_transfer_speed = 150000;
 856                 ccb->cpi.transport = XPORT_SATA;
 857                 ccb->cpi.transport_version = 1;
 858                 ccb->cpi.protocol = PROTO_SCSI;
 859                 ccb->cpi.protocol_version = SCSI_REV_2;
 860
 861                 ccbh->status = CAM_REQ_CMP;
 862                 if (ccbh->target_id == CAM_TARGET_WILDCARD) {
 863                         ahci_os_lock_port(ap);
 864                         ahci_port_state_machine(ap, 0);
 865                         ahci_os_unlock_port(ap);
 866                 } else {
 867                         switch(ahci_pread(ap, AHCI_PREG_SSTS) &
 868                                AHCI_PREG_SSTS_SPD) {
 869                         case AHCI_PREG_SSTS_SPD_GEN1:
 870                                 ccb->cpi.base_transfer_speed = 150000;
 871                                 break;
 872                         case AHCI_PREG_SSTS_SPD_GEN2:
 873                                 ccb->cpi.base_transfer_speed = 300000;
 874                                 break;
 875                         default:
 876                                 /* unknown */
 877                                 ccb->cpi.base_transfer_speed = 1000;
 878                                 break;
 879                         }
 880 #if 0
 881                         if (ap->ap_type == ATA_PORT_T_NONE)
 882                                 ccbh->status = CAM_DEV_NOT_THERE;
 883 #endif
 884                 }
 885                 xpt_done(ccb);
 886                 break;
 887         case XPT_RESET_DEV:
 888                 ahci_os_lock_port(ap);
 889                 if (ap->ap_type == ATA_PORT_T_NONE) {
 890                         ccbh->status = CAM_DEV_NOT_THERE;
 891                 } else {
 892                         ahci_port_reset(ap, atx, 0);
 893                         ccbh->status = CAM_REQ_CMP;
 894                 }
 895                 ahci_os_unlock_port(ap);
 896                 xpt_done(ccb);
 897                 break;
 898         case XPT_RESET_BUS:
 899                 ahci_os_lock_port(ap);
 900                 ahci_port_reset(ap, NULL, 1);
 901                 ahci_os_unlock_port(ap);
 902                 ccbh->status = CAM_REQ_CMP;
 903                 xpt_done(ccb);
 904                 break;
 905         case XPT_SET_TRAN_SETTINGS:
 906                 ccbh->status = CAM_FUNC_NOTAVAIL;
 907                 xpt_done(ccb);
 908                 break;
 909         case XPT_GET_TRAN_SETTINGS:
 910                 ccb->cts.protocol = PROTO_SCSI;
 911                 ccb->cts.protocol_version = SCSI_REV_2;
 912                 ccb->cts.transport = XPORT_SATA;
 913                 ccb->cts.transport_version = XPORT_VERSION_UNSPECIFIED;
 914                 ccb->cts.proto_specific.valid = 0;
 915                 ccb->cts.xport_specific.valid = 0;
 916                 ccbh->status = CAM_REQ_CMP;
 917                 xpt_done(ccb);
 918                 break;
 919         case XPT_CALC_GEOMETRY:
 920                 cam_calc_geometry(&ccb->ccg, 1);
 921                 xpt_done(ccb);
 922                 break;
 923         case XPT_SCSI_IO:
 924                 /*
 925                  * Our parallel startup code might have only probed through
 926                  * to the IDENT, so do the last step if necessary.
 927                  */
 928                 if (at->at_probe == ATA_PROBE_NEED_IDENT)
 929                         ahci_cam_probe(ap, atx);
 930                 if (at->at_probe != ATA_PROBE_GOOD) {
 931                         ccbh->status = CAM_DEV_NOT_THERE;
 932                         xpt_done(ccb);
 933                         break;
 934                 }
 935                 switch(at->at_type) {
 936                 case ATA_PORT_T_DISK:
 937                         ahci_xpt_scsi_disk_io(ap, atx, ccb);
 938                         break;
 939                 case ATA_PORT_T_ATAPI:
 940                         ahci_xpt_scsi_atapi_io(ap, atx, ccb);
 941                         break;
 942                 default:
 943                         ccbh->status = CAM_REQ_INVALID;
 944                         xpt_done(ccb);
 945                         break;
 946                 }
 947                 break;
 948         default:
 949                 ccbh->status = CAM_REQ_INVALID;
 950                 xpt_done(ccb);
 951                 break;
 952         }
 953 }
 954
 955 /*
 956  * Poll function.
 957  *
 958  * Generally this function gets called heavily when interrupts might be
 959  * non-operational, during a halt/reboot or panic.
 960  */
 961 static
 962 void
 963 ahci_xpt_poll(struct cam_sim *sim)
 964 {
 965         struct ahci_port *ap;
 966
 967         ap = cam_sim_softc(sim);
 968         crit_enter();
 969         ahci_os_lock_port(ap);
 970         ahci_port_intr(ap, 1);
 971         ahci_os_unlock_port(ap);
 972         crit_exit();
 973 }
 974
 975 /*
 976  * Convert the SCSI command in ccb to an ata_xfer command in xa
 977  * for ATA_PORT_T_DISK operations.  Set the completion function
 978  * to convert the response back, then dispatch to the OpenBSD AHCI
 979  * layer.
 980  *
 981  * AHCI DISK commands only support a limited command set, and we
 982  * fake additional commands to make it play nice with the CAM subsystem.
 983  */
 984 static
 985 void
 986 ahci_xpt_scsi_disk_io(struct ahci_port *ap, struct ata_port *atx,
 987                       union ccb *ccb)
 988 {
 989         struct ccb_hdr *ccbh;
 990         struct ccb_scsiio *csio;
 991         struct ata_xfer *xa;
 992         struct ata_port *at;
 993         struct ata_fis_h2d *fis;
 994         struct ata_pass_12 *atp12;
 995         struct ata_pass_16 *atp16;
 996         scsi_cdb_t cdb;
 997         union scsi_data *rdata;
 998         int rdata_len;
 999         u_int64_t capacity;
1000         u_int64_t lba;
1001         u_int32_t count;
1002
1003         ccbh = &ccb->csio.ccb_h;
1004         csio = &ccb->csio;
1005         at = atx ? atx : ap->ap_ata[0];
1006
1007         /*
1008          * XXX not passing NULL at for direct attach!
1009          */
1010         xa = ahci_ata_get_xfer(ap, atx);
1011         rdata = (void *)csio->data_ptr;
1012         rdata_len = csio->dxfer_len;
1013
1014         /*
1015          * Build the FIS or process the csio to completion.
1016          */
1017         cdb = (void *)((ccbh->flags & CAM_CDB_POINTER) ?
1018                         csio->cdb_io.cdb_ptr : csio->cdb_io.cdb_bytes);
1019
1020         switch(cdb->generic.opcode) {
1021         case REQUEST_SENSE:
1022                 /*
1023                  * Auto-sense everything, so explicit sense requests
1024                  * return no-sense.
1025                  */
1026                 ccbh->status = CAM_SCSI_STATUS_ERROR;
1027                 break;
1028         case INQUIRY:
1029                 /*
1030                  * Inquiry supported features
1031                  *
1032                  * [opcode, byte2, page_code, length, control]
1033                  */
1034                 if (cdb->inquiry.byte2 & SI_EVPD) {
1035                         ahci_xpt_page_inquiry(ap, at, ccb);
1036                 } else {
1037                         bzero(rdata, rdata_len);
1038                         if (rdata_len < SHORT_INQUIRY_LENGTH) {
1039                                 ccbh->status = CAM_CCB_LEN_ERR;
1040                                 break;
1041                         }
1042                         if (rdata_len > sizeof(rdata->inquiry_data))
1043                                 rdata_len = sizeof(rdata->inquiry_data);
1044                         rdata->inquiry_data.device = T_DIRECT;
1045                         rdata->inquiry_data.version = SCSI_REV_SPC2;
1046                         rdata->inquiry_data.response_format = 2;
1047                         rdata->inquiry_data.additional_length = 32;
1048                         bcopy("SATA    ", rdata->inquiry_data.vendor, 8);
1049                         bcopy(at->at_identify.model,
1050                               rdata->inquiry_data.product,
1051                               sizeof(rdata->inquiry_data.product));
1052                         bcopy(at->at_identify.firmware,
1053                               rdata->inquiry_data.revision,
1054                               sizeof(rdata->inquiry_data.revision));
1055                         ccbh->status = CAM_REQ_CMP;
1056                 }
1057                 break;
1058         case READ_CAPACITY_16:
1059                 if (cdb->read_capacity_16.service_action != SRC16_SERVICE_ACTION) {
1060                         ccbh->status = CAM_REQ_INVALID;
1061                         break;
1062                 }
1063                 if (rdata_len < sizeof(rdata->read_capacity_data_16)) {
1064                         ccbh->status = CAM_CCB_LEN_ERR;
1065                         break;
1066                 }
1067                 /* fall through */
1068         case READ_CAPACITY:
1069                 if (rdata_len < sizeof(rdata->read_capacity_data)) {
1070                         ccbh->status = CAM_CCB_LEN_ERR;
1071                         break;
1072                 }
1073
1074                 capacity = at->at_capacity;
1075
1076                 bzero(rdata, rdata_len);
1077                 if (cdb->generic.opcode == READ_CAPACITY) {
1078                         rdata_len = sizeof(rdata->read_capacity_data);
1079                         if (capacity > 0xFFFFFFFFU)
1080                                 capacity = 0xFFFFFFFFU;
1081                         bzero(&rdata->read_capacity_data, rdata_len);
1082                         scsi_ulto4b((u_int32_t)capacity - 1,
1083                                     rdata->read_capacity_data.addr);
1084                         scsi_ulto4b(512, rdata->read_capacity_data.length);
1085                 } else {
1086                         rdata_len = sizeof(rdata->read_capacity_data_16);
1087                         bzero(&rdata->read_capacity_data_16, rdata_len);
1088                         scsi_u64to8b(capacity - 1,
1089                                      rdata->read_capacity_data_16.addr);
1090                         scsi_ulto4b(512, rdata->read_capacity_data_16.length);
1091                 }
1092                 ccbh->status = CAM_REQ_CMP;
1093                 break;
1094         case SYNCHRONIZE_CACHE:
1095                 /*
1096                  * Synchronize cache.  Specification says this can take
1097                  * greater then 30 seconds so give it at least 45.
1098                  */
1099                 fis = xa->fis;
1100                 fis->flags = ATA_H2D_FLAGS_CMD;
1101                 fis->command = ATA_C_FLUSH_CACHE;
1102                 fis->device = 0;
1103                 if (xa->timeout < 45000)
1104                         xa->timeout = 45000;
1105                 xa->datalen = 0;
1106                 xa->flags = 0;
1107                 xa->complete = ahci_ata_complete_disk_synchronize_cache;
1108                 break;
1109         case TEST_UNIT_READY:
1110         case START_STOP_UNIT:
1111         case PREVENT_ALLOW:
1112                 /*
1113                  * Just silently return success
1114                  */
1115                 ccbh->status = CAM_REQ_CMP;
1116                 rdata_len = 0;
1117                 break;
1118         case ATA_PASS_12:
1119                 atp12 = &cdb->ata_pass_12;
1120                 fis = xa->fis;
1121                 /*
1122                  * Figure out the flags to be used, depending on the direction of the
1123                  * CAM request.
1124                  */
1125                 switch (ccbh->flags & CAM_DIR_MASK) {
1126                 case CAM_DIR_IN:
1127                         xa->flags = ATA_F_READ;
1128                         break;
1129                 case CAM_DIR_OUT:
1130                         xa->flags = ATA_F_WRITE;
1131                         break;
1132                 default:
1133                         xa->flags = 0;
1134                 }
1135                 xa->flags |= ATA_F_POLL | ATA_F_EXCLUSIVE;
1136                 xa->data = csio->data_ptr;
1137                 xa->datalen = csio->dxfer_len;
1138                 xa->complete = ahci_ata_complete_disk_rw;
1139                 xa->timeout = ccbh->timeout;
1140
1141                 /*
1142                  * Populate the fis from the information we received through CAM
1143                  * ATA passthrough.
1144                  */
1145                 fis->flags = ATA_H2D_FLAGS_CMD; /* maybe also atp12->flags ? */
1146                 fis->features = atp12->features;
1147                 fis->sector_count = atp12->sector_count;
1148                 fis->lba_low = atp12->lba_low;
1149                 fis->lba_mid = atp12->lba_mid;
1150                 fis->lba_high = atp12->lba_high;
1151                 fis->device = atp12->device;    /* maybe always 0? */
1152                 fis->command = atp12->command;
1153                 fis->control = atp12->control;
1154
1155                 /*
1156                  * Mark as in progress so it is sent to the device.
1157                  */
1158                 ccbh->status = CAM_REQ_INPROG;
1159                 break;
1160         case ATA_PASS_16:
1161                 atp16 = &cdb->ata_pass_16;
1162                 fis = xa->fis;
1163                 /*
1164                  * Figure out the flags to be used, depending on the direction of the
1165                  * CAM request.
1166                  */
1167                 switch (ccbh->flags & CAM_DIR_MASK) {
1168                 case CAM_DIR_IN:
1169                         xa->flags = ATA_F_READ;
1170                         break;
1171                 case CAM_DIR_OUT:
1172                         xa->flags = ATA_F_WRITE;
1173                         break;
1174                 default:
1175                         xa->flags = 0;
1176                 }
1177                 xa->flags |= ATA_F_POLL | ATA_F_EXCLUSIVE;
1178                 xa->data = csio->data_ptr;
1179                 xa->datalen = csio->dxfer_len;
1180                 xa->complete = ahci_ata_complete_disk_rw;
1181                 xa->timeout = ccbh->timeout;
1182
1183                 /*
1184                  * Populate the fis from the information we received through CAM
1185                  * ATA passthrough.
1186                  */
1187                 fis->flags = ATA_H2D_FLAGS_CMD; /* maybe also atp16->flags ? */
1188                 fis->features = atp16->features;
1189                 fis->features_exp = atp16->features_ext;
1190                 fis->sector_count = atp16->sector_count;
1191                 fis->sector_count_exp = atp16->sector_count_ext;
1192                 fis->lba_low = atp16->lba_low;
1193                 fis->lba_low_exp = atp16->lba_low_ext;
1194                 fis->lba_mid = atp16->lba_mid;
1195                 fis->lba_mid_exp = atp16->lba_mid_ext;
1196                 fis->lba_high = atp16->lba_high;
1197                 fis->lba_mid_exp = atp16->lba_mid_ext;
1198                 fis->device = atp16->device;    /* maybe always 0? */
1199                 fis->command = atp16->command;
1200
1201                 /*
1202                  * Mark as in progress so it is sent to the device.
1203                  */
1204                 ccbh->status = CAM_REQ_INPROG;
1205                 break;
1206         default:
1207                 switch(cdb->generic.opcode) {
1208                 case READ_6:
1209                         lba = scsi_3btoul(cdb->rw_6.addr) & 0x1FFFFF;
1210                         count = cdb->rw_6.length ? cdb->rw_6.length : 0x100;
1211                         xa->flags = ATA_F_READ;
1212                         break;
1213                 case READ_10:
1214                         lba = scsi_4btoul(cdb->rw_10.addr);
1215                         count = scsi_2btoul(cdb->rw_10.length);
1216                         xa->flags = ATA_F_READ;
1217                         break;
1218                 case READ_12:
1219                         lba = scsi_4btoul(cdb->rw_12.addr);
1220                         count = scsi_4btoul(cdb->rw_12.length);
1221                         xa->flags = ATA_F_READ;
1222                         break;
1223                 case READ_16:
1224                         lba = scsi_8btou64(cdb->rw_16.addr);
1225                         count = scsi_4btoul(cdb->rw_16.length);
1226                         xa->flags = ATA_F_READ;
1227                         break;
1228                 case WRITE_6:
1229                         lba = scsi_3btoul(cdb->rw_6.addr) & 0x1FFFFF;
1230                         count = cdb->rw_6.length ? cdb->rw_6.length : 0x100;
1231                         xa->flags = ATA_F_WRITE;
1232                         break;
1233                 case WRITE_10:
1234                         lba = scsi_4btoul(cdb->rw_10.addr);
1235                         count = scsi_2btoul(cdb->rw_10.length);
1236                         xa->flags = ATA_F_WRITE;
1237                         break;
1238                 case WRITE_12:
1239                         lba = scsi_4btoul(cdb->rw_12.addr);
1240                         count = scsi_4btoul(cdb->rw_12.length);
1241                         xa->flags = ATA_F_WRITE;
1242                         break;
1243                 case WRITE_16:
1244                         lba = scsi_8btou64(cdb->rw_16.addr);
1245                         count = scsi_4btoul(cdb->rw_16.length);
1246                         xa->flags = ATA_F_WRITE;
1247                         break;
1248                 default:
1249                         ccbh->status = CAM_REQ_INVALID;
1250                         break;
1251                 }
1252                 if (ccbh->status != CAM_REQ_INPROG)
1253                         break;
1254
1255                 fis = xa->fis;
1256                 fis->flags = ATA_H2D_FLAGS_CMD;
1257                 fis->lba_low = (u_int8_t)lba;
1258                 fis->lba_mid = (u_int8_t)(lba >> 8);
1259                 fis->lba_high = (u_int8_t)(lba >> 16);
1260                 fis->device = ATA_H2D_DEVICE_LBA;
1261
1262                 /*
1263                  * NCQ only for direct-attached disks, do not currently
1264                  * try to use NCQ with port multipliers.
1265                  */
1266                 if (at->at_ncqdepth > 1 &&
1267                     ap->ap_type == ATA_PORT_T_DISK &&
1268                     (ap->ap_sc->sc_cap & AHCI_REG_CAP_SNCQ) &&
1269                     (ccbh->flags & CAM_POLLED) == 0) {
1270                         /*
1271                          * Use NCQ - always uses 48 bit addressing
1272                          */
1273                         xa->flags |= ATA_F_NCQ;
1274                         fis->command = (xa->flags & ATA_F_WRITE) ?
1275                                         ATA_C_WRITE_FPDMA : ATA_C_READ_FPDMA;
1276                         fis->lba_low_exp = (u_int8_t)(lba >> 24);
1277                         fis->lba_mid_exp = (u_int8_t)(lba >> 32);
1278                         fis->lba_high_exp = (u_int8_t)(lba >> 40);
1279                         fis->sector_count = xa->tag << 3;
1280                         fis->features = (u_int8_t)count;
1281                         fis->features_exp = (u_int8_t)(count >> 8);
1282                 } else if (count > 0x100 || lba > 0x0FFFFFFFU) {
1283                         /*
1284                          * Use LBA48
1285                          */
1286                         fis->command = (xa->flags & ATA_F_WRITE) ?
1287                                         ATA_C_WRITEDMA_EXT : ATA_C_READDMA_EXT;
1288                         fis->lba_low_exp = (u_int8_t)(lba >> 24);
1289                         fis->lba_mid_exp = (u_int8_t)(lba >> 32);
1290                         fis->lba_high_exp = (u_int8_t)(lba >> 40);
1291                         fis->sector_count = (u_int8_t)count;
1292                         fis->sector_count_exp = (u_int8_t)(count >> 8);
1293                 } else {
1294                         /*
1295                          * Use LBA
1296                          *
1297                          * NOTE: 256 sectors is supported, stored as 0.
1298                          */
1299                         fis->command = (xa->flags & ATA_F_WRITE) ?
1300                                         ATA_C_WRITEDMA : ATA_C_READDMA;
1301                         fis->device |= (u_int8_t)(lba >> 24) & 0x0F;
1302                         fis->sector_count = (u_int8_t)count;
1303                 }
1304
1305                 xa->data = csio->data_ptr;
1306                 xa->datalen = csio->dxfer_len;
1307                 xa->complete = ahci_ata_complete_disk_rw;
1308                 xa->timeout = ccbh->timeout;    /* milliseconds */
1309 #if 0
1310                 if (xa->timeout > 10000)        /* XXX - debug */
1311                         xa->timeout = 10000;
1312 #endif
1313                 if (ccbh->flags & CAM_POLLED)
1314                         xa->flags |= ATA_F_POLL;
1315                 break;
1316         }
1317
1318         /*
1319          * If the request is still in progress the xa and FIS have
1320          * been set up (except for the PM target), and must be dispatched.
1321          * Otherwise the request was completed.
1322          */
1323         if (ccbh->status == CAM_REQ_INPROG) {
1324                 KKASSERT(xa->complete != NULL);
1325                 xa->atascsi_private = ccb;
1326                 ccb->ccb_h.sim_priv.entries[0].ptr = ap;
1327                 ahci_os_lock_port(ap);
1328                 xa->fis->flags |= at->at_target;
1329                 ahci_ata_cmd(xa);
1330                 ahci_os_unlock_port(ap);
1331         } else {
1332                 ahci_ata_put_xfer(xa);
1333                 xpt_done(ccb);
1334         }
1335 }
1336
1337 /*
1338  * Convert the SCSI command in ccb to an ata_xfer command in xa
1339  * for ATA_PORT_T_ATAPI operations.  Set the completion function
1340  * to convert the response back, then dispatch to the OpenBSD AHCI
1341  * layer.
1342  */
1343 static
1344 void
1345 ahci_xpt_scsi_atapi_io(struct ahci_port *ap, struct ata_port *atx,
1346                         union ccb *ccb)
1347 {
1348         struct ccb_hdr *ccbh;
1349         struct ccb_scsiio *csio;
1350         struct ata_xfer *xa;
1351         struct ata_fis_h2d *fis;
1352         scsi_cdb_t cdbs;
1353         scsi_cdb_t cdbd;
1354         int flags;
1355         struct ata_port *at;
1356
1357         ccbh = &ccb->csio.ccb_h;
1358         csio = &ccb->csio;
1359         at = atx ? atx : ap->ap_ata[0];
1360
1361         switch (ccbh->flags & CAM_DIR_MASK) {
1362         case CAM_DIR_IN:
1363                 flags = ATA_F_PACKET | ATA_F_READ;
1364                 break;
1365         case CAM_DIR_OUT:
1366                 flags = ATA_F_PACKET | ATA_F_WRITE;
1367                 break;
1368         case CAM_DIR_NONE:
1369                 flags = ATA_F_PACKET;
1370                 break;
1371         default:
1372                 ccbh->status = CAM_REQ_INVALID;
1373                 xpt_done(ccb);
1374                 return;
1375                 /* NOT REACHED */
1376         }
1377
1378         /*
1379          * Special handling to get the rfis back into host memory while
1380          * still allowing the chip to run commands in parallel to
1381          * ATAPI devices behind a PM.
1382          */
1383         flags |= ATA_F_AUTOSENSE;
1384
1385         /*
1386          * The command has to fit in the packet command buffer.
1387          */
1388         if (csio->cdb_len < 6 || csio->cdb_len > 16) {
1389                 ccbh->status = CAM_CCB_LEN_ERR;
1390                 xpt_done(ccb);
1391                 return;
1392         }
1393
1394         /*
1395          * Initialize the XA and FIS.  It is unclear how much of
1396          * this has to mimic the equivalent ATA command.
1397          *
1398          * XXX not passing NULL at for direct attach!
1399          */
1400         xa = ahci_ata_get_xfer(ap, atx);
1401         fis = xa->fis;
1402
1403         fis->flags = ATA_H2D_FLAGS_CMD | at->at_target;
1404         fis->command = ATA_C_PACKET;
1405         fis->device = ATA_H2D_DEVICE_LBA;
1406         fis->sector_count = xa->tag << 3;
1407         if (flags & (ATA_F_READ | ATA_F_WRITE)) {
1408                 if (flags & ATA_F_WRITE) {
1409                         fis->features = ATA_H2D_FEATURES_DMA |
1410                                        ATA_H2D_FEATURES_DIR_WRITE;
1411                 } else {
1412                         fis->features = ATA_H2D_FEATURES_DMA |
1413                                        ATA_H2D_FEATURES_DIR_READ;
1414                 }
1415         } else {
1416                 fis->lba_mid = 0;
1417                 fis->lba_high = 0;
1418         }
1419         fis->control = ATA_FIS_CONTROL_4BIT;
1420
1421         xa->flags = flags;
1422         xa->data = csio->data_ptr;
1423         xa->datalen = csio->dxfer_len;
1424         xa->timeout = ccbh->timeout;    /* milliseconds */
1425
1426         if (ccbh->flags & CAM_POLLED)
1427                 xa->flags |= ATA_F_POLL;
1428
1429         /*
1430          * Copy the cdb to the packetcmd buffer in the FIS using a
1431          * convenient pointer in the xa.
1432          *
1433          * Zero-out any trailing bytes in case the ATAPI device cares.
1434          */
1435         cdbs = (void *)((ccbh->flags & CAM_CDB_POINTER) ?
1436                         csio->cdb_io.cdb_ptr : csio->cdb_io.cdb_bytes);
1437         bcopy(cdbs, xa->packetcmd, csio->cdb_len);
1438         if (csio->cdb_len < 16)
1439                 bzero(xa->packetcmd + csio->cdb_len, 16 - csio->cdb_len);
1440
1441 #if 0
1442         kprintf("opcode %d cdb_len %d dxfer_len %d\n",
1443                 cdbs->generic.opcode,
1444                 csio->cdb_len, csio->dxfer_len);
1445 #endif
1446
1447         /*
1448          * Some ATAPI commands do not actually follow the SCSI standard.
1449          */
1450         cdbd = (void *)xa->packetcmd;
1451
1452         switch(cdbd->generic.opcode) {
1453         case REQUEST_SENSE:
1454                 /*
1455                  * Force SENSE requests to the ATAPI sense length.
1456                  *
1457                  * It is unclear if this is needed or not.
1458                  */
1459                 if (cdbd->sense.length == SSD_FULL_SIZE) {
1460                         if (bootverbose) {
1461                                 kprintf("%s: Shortening sense request\n",
1462                                         PORTNAME(ap));
1463                         }
1464                         cdbd->sense.length = offsetof(struct scsi_sense_data,
1465                                                       extra_bytes[0]);
1466                 }
1467                 break;
1468         case INQUIRY:
1469                 /*
1470                  * Some ATAPI devices can't handle long inquiry lengths,
1471                  * don't ask me why.  Truncate the inquiry length.
1472                  */
1473                 if (cdbd->inquiry.page_code == 0 &&
1474                     cdbd->inquiry.length > SHORT_INQUIRY_LENGTH) {
1475                         cdbd->inquiry.length = SHORT_INQUIRY_LENGTH;
1476                 }
1477                 break;
1478         case READ_6:
1479         case WRITE_6:
1480                 /*
1481                  * Convert *_6 to *_10 commands.  Most ATAPI devices
1482                  * cannot handle the SCSI READ_6 and WRITE_6 commands.
1483                  */
1484                 cdbd->rw_10.opcode |= 0x20;
1485                 cdbd->rw_10.byte2 = 0;
1486                 cdbd->rw_10.addr[0] = cdbs->rw_6.addr[0] & 0x1F;
1487                 cdbd->rw_10.addr[1] = cdbs->rw_6.addr[1];
1488                 cdbd->rw_10.addr[2] = cdbs->rw_6.addr[2];
1489                 cdbd->rw_10.addr[3] = 0;
1490                 cdbd->rw_10.reserved = 0;
1491                 cdbd->rw_10.length[0] = 0;
1492                 cdbd->rw_10.length[1] = cdbs->rw_6.length;
1493                 cdbd->rw_10.control = cdbs->rw_6.control;
1494                 break;
1495         default:
1496                 break;
1497         }
1498
1499         /*
1500          * And dispatch
1501          */
1502         xa->complete = ahci_atapi_complete_cmd;
1503         xa->atascsi_private = ccb;
1504         ccb->ccb_h.sim_priv.entries[0].ptr = ap;
1505         ahci_os_lock_port(ap);
1506         ahci_ata_cmd(xa);
1507         ahci_os_unlock_port(ap);
1508 }
1509
1510 /*
1511  * Simulate page inquiries for disk attachments.
1512  */
1513 static
1514 void
1515 ahci_xpt_page_inquiry(struct ahci_port *ap, struct ata_port *at, union ccb *ccb)
1516 {
1517         union {
1518                 struct scsi_vpd_supported_page_list     list;
1519                 struct scsi_vpd_unit_serial_number      serno;
1520                 struct scsi_vpd_unit_devid              devid;
1521                 char                                    buf[256];
1522         } *page;
1523         scsi_cdb_t cdb;
1524         int i;
1525         int j;
1526         int len;
1527
1528         page = kmalloc(sizeof(*page), M_DEVBUF, M_WAITOK | M_ZERO);
1529
1530         cdb = (void *)((ccb->ccb_h.flags & CAM_CDB_POINTER) ?
1531                         ccb->csio.cdb_io.cdb_ptr : ccb->csio.cdb_io.cdb_bytes);
1532
1533         switch(cdb->inquiry.page_code) {
1534         case SVPD_SUPPORTED_PAGE_LIST:
1535                 i = 0;
1536                 page->list.device = T_DIRECT;
1537                 page->list.page_code = SVPD_SUPPORTED_PAGE_LIST;
1538                 page->list.list[i++] = SVPD_SUPPORTED_PAGE_LIST;
1539                 page->list.list[i++] = SVPD_UNIT_SERIAL_NUMBER;
1540                 page->list.list[i++] = SVPD_UNIT_DEVID;
1541                 page->list.length = i;
1542                 len = offsetof(struct scsi_vpd_supported_page_list, list[3]);
1543                 break;
1544         case SVPD_UNIT_SERIAL_NUMBER:
1545                 i = 0;
1546                 j = sizeof(at->at_identify.serial);
1547                 for (i = 0; i < j && at->at_identify.serial[i] == ' '; ++i)
1548                         ;
1549                 while (j > i && at->at_identify.serial[j-1] == ' ')
1550                         --j;
1551                 page->serno.device = T_DIRECT;
1552                 page->serno.page_code = SVPD_UNIT_SERIAL_NUMBER;
1553                 page->serno.length = j - i;
1554                 bcopy(at->at_identify.serial + i,
1555                       page->serno.serial_num, j - i);
1556                 len = offsetof(struct scsi_vpd_unit_serial_number,
1557                                serial_num[j-i]);
1558                 break;
1559         case SVPD_UNIT_DEVID:
1560                 /* fall through for now */
1561         default:
1562                 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
1563                 len = 0;
1564                 break;
1565         }
1566         if (ccb->ccb_h.status == CAM_REQ_INPROG) {
1567                 if (len <= ccb->csio.dxfer_len) {
1568                         ccb->ccb_h.status = CAM_REQ_CMP;
1569                         bzero(ccb->csio.data_ptr, ccb->csio.dxfer_len);
1570                         bcopy(page, ccb->csio.data_ptr, len);
1571                         ccb->csio.resid = ccb->csio.dxfer_len - len;
1572                 } else {
1573                         ccb->ccb_h.status = CAM_CCB_LEN_ERR;
1574                 }
1575         }
1576         kfree(page, M_DEVBUF);
1577 }
1578
1579 /*
1580  * Completion function for ATA_PORT_T_DISK cache synchronization.
1581  */
1582 static
1583 void
1584 ahci_ata_complete_disk_synchronize_cache(struct ata_xfer *xa)
1585 {
1586         union ccb *ccb = xa->atascsi_private;
1587         struct ccb_hdr *ccbh = &ccb->ccb_h;
1588         struct ahci_port *ap = ccb->ccb_h.sim_priv.entries[0].ptr;
1589
1590         switch(xa->state) {
1591         case ATA_S_COMPLETE:
1592                 ccbh->status = CAM_REQ_CMP;
1593                 ccb->csio.scsi_status = SCSI_STATUS_OK;
1594                 break;
1595         case ATA_S_ERROR:
1596                 kprintf("%s: synchronize_cache: error\n",
1597                         ATANAME(ap, xa->at));
1598                 ccbh->status = CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID;
1599                 ccb->csio.scsi_status = SCSI_STATUS_CHECK_COND;
1600                 ahci_ata_dummy_sense(&ccb->csio.sense_data);
1601                 break;
1602         case ATA_S_TIMEOUT:
1603                 kprintf("%s: synchronize_cache: timeout\n",
1604                         ATANAME(ap, xa->at));
1605                 ccbh->status = CAM_CMD_TIMEOUT;
1606                 break;
1607         default:
1608                 kprintf("%s: synchronize_cache: unknown state %d\n",
1609                         ATANAME(ap, xa->at), xa->state);
1610                 ccbh->status = CAM_REQ_CMP_ERR;
1611                 break;
1612         }
1613         ahci_ata_put_xfer(xa);
1614         ahci_os_unlock_port(ap);
1615         xpt_done(ccb);
1616         ahci_os_lock_port(ap);
1617 }
1618
1619 /*
1620  * Completion function for ATA_PORT_T_DISK I/O
1621  */
1622 static
1623 void
1624 ahci_ata_complete_disk_rw(struct ata_xfer *xa)
1625 {
1626         union ccb *ccb = xa->atascsi_private;
1627         struct ccb_hdr *ccbh = &ccb->ccb_h;
1628         struct ahci_port *ap = ccb->ccb_h.sim_priv.entries[0].ptr;
1629
1630         switch(xa->state) {
1631         case ATA_S_COMPLETE:
1632                 ccbh->status = CAM_REQ_CMP;
1633                 ccb->csio.scsi_status = SCSI_STATUS_OK;
1634                 break;
1635         case ATA_S_ERROR:
1636                 kprintf("%s: disk_rw: error\n", ATANAME(ap, xa->at));
1637                 ccbh->status = CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID;
1638                 ccb->csio.scsi_status = SCSI_STATUS_CHECK_COND;
1639                 ahci_ata_dummy_sense(&ccb->csio.sense_data);
1640                 break;
1641         case ATA_S_TIMEOUT:
1642                 kprintf("%s: disk_rw: timeout\n", ATANAME(ap, xa->at));
1643                 ccbh->status = CAM_CMD_TIMEOUT;
1644                 ccb->csio.scsi_status = SCSI_STATUS_CHECK_COND;
1645                 ahci_ata_dummy_sense(&ccb->csio.sense_data);
1646                 break;
1647         default:
1648                 kprintf("%s: disk_rw: unknown state %d\n",
1649                         ATANAME(ap, xa->at), xa->state);
1650                 ccbh->status = CAM_REQ_CMP_ERR;
1651                 break;
1652         }
1653         ccb->csio.resid = xa->resid;
1654         ahci_ata_put_xfer(xa);
1655         ahci_os_unlock_port(ap);
1656         xpt_done(ccb);
1657         ahci_os_lock_port(ap);
1658 }
1659
1660 /*
1661  * Completion function for ATA_PORT_T_ATAPI I/O
1662  *
1663  * Sense data is returned in the rfis.
1664  */
1665 static
1666 void
1667 ahci_atapi_complete_cmd(struct ata_xfer *xa)
1668 {
1669         union ccb *ccb = xa->atascsi_private;
1670         struct ccb_hdr *ccbh = &ccb->ccb_h;
1671         struct ahci_port *ap = ccb->ccb_h.sim_priv.entries[0].ptr;
1672         scsi_cdb_t cdb;
1673
1674         cdb = (void *)((ccb->ccb_h.flags & CAM_CDB_POINTER) ?
1675                         ccb->csio.cdb_io.cdb_ptr : ccb->csio.cdb_io.cdb_bytes);
1676
1677         switch(xa->state) {
1678         case ATA_S_COMPLETE:
1679                 ccbh->status = CAM_REQ_CMP;
1680                 ccb->csio.scsi_status = SCSI_STATUS_OK;
1681                 break;
1682         case ATA_S_ERROR:
1683                 ccbh->status = CAM_SCSI_STATUS_ERROR;
1684                 ccb->csio.scsi_status = SCSI_STATUS_CHECK_COND;
1685                 ahci_ata_atapi_sense(&xa->rfis, &ccb->csio.sense_data);
1686                 break;
1687         case ATA_S_TIMEOUT:
1688                 kprintf("%s: cmd %d: timeout\n",
1689                         PORTNAME(ap), cdb->generic.opcode);
1690                 ccbh->status = CAM_CMD_TIMEOUT;
1691                 ccb->csio.scsi_status = SCSI_STATUS_CHECK_COND;
1692                 ahci_ata_dummy_sense(&ccb->csio.sense_data);
1693                 break;
1694         default:
1695                 kprintf("%s: cmd %d: unknown state %d\n",
1696                         PORTNAME(ap), cdb->generic.opcode, xa->state);
1697                 ccbh->status = CAM_REQ_CMP_ERR;
1698                 break;
1699         }
1700         ccb->csio.resid = xa->resid;
1701         ahci_ata_put_xfer(xa);
1702         ahci_os_unlock_port(ap);
1703         xpt_done(ccb);
1704         ahci_os_lock_port(ap);
1705 }
1706
1707 /*
1708  * Construct dummy sense data for errors on DISKs
1709  */
1710 static
1711 void
1712 ahci_ata_dummy_sense(struct scsi_sense_data *sense_data)
1713 {
1714         sense_data->error_code = SSD_ERRCODE_VALID | SSD_CURRENT_ERROR;
1715         sense_data->segment = 0;
1716         sense_data->flags = SSD_KEY_MEDIUM_ERROR;
1717         sense_data->info[0] = 0;
1718         sense_data->info[1] = 0;
1719         sense_data->info[2] = 0;
1720         sense_data->info[3] = 0;
1721         sense_data->extra_len = 0;
1722 }
1723
1724 /*
1725  * Construct atapi sense data for errors on ATAPI
1726  *
1727  * The ATAPI sense data is stored in the passed rfis and must be converted
1728  * to SCSI sense data.
1729  */
1730 static
1731 void
1732 ahci_ata_atapi_sense(struct ata_fis_d2h *rfis,
1733                      struct scsi_sense_data *sense_data)
1734 {
1735         sense_data->error_code = SSD_ERRCODE_VALID | SSD_CURRENT_ERROR;
1736         sense_data->segment = 0;
1737         sense_data->flags = (rfis->error & 0xF0) >> 4;
1738         if (rfis->error & 0x04)
1739                 sense_data->flags |= SSD_KEY_ILLEGAL_REQUEST;
1740         if (rfis->error & 0x02)
1741                 sense_data->flags |= SSD_EOM;
1742         if (rfis->error & 0x01)
1743                 sense_data->flags |= SSD_ILI;
1744         sense_data->info[0] = 0;
1745         sense_data->info[1] = 0;
1746         sense_data->info[2] = 0;
1747         sense_data->info[3] = 0;
1748         sense_data->extra_len = 0;
1749 }
1750
1751 static
1752 void
1753 ahci_strip_string(const char **basep, int *lenp)
1754 {
1755         const char *base = *basep;
1756         int len = *lenp;
1757
1758         while (len && (*base == 0 || *base == ' ')) {
1759                 --len;
1760                 ++base;
1761         }
1762         while (len && (base[len-1] == 0 || base[len-1] == ' '))
1763                 --len;
1764         *basep = base;
1765         *lenp = len;
1766 }