1 /* 2 * (MPSAFE) 3 * 4 * Copyright (c) 2009 The DragonFly Project. All rights reserved. 5 * 6 * This code is derived from software contributed to The DragonFly Project 7 * by Matthew Dillon <dillon@backplane.com> 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 3. Neither the name of The DragonFly Project nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific, prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 26 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 27 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 29 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 30 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 31 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 32 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 33 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * 37 * Copyright (c) 2007 David Gwynne <dlg@openbsd.org> 38 * 39 * Permission to use, copy, modify, and distribute this software for any 40 * purpose with or without fee is hereby granted, provided that the above 41 * copyright notice and this permission notice appear in all copies. 42 * 43 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 44 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 45 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 46 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 47 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 48 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 49 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 50 * 51 * $OpenBSD: atascsi.c,v 1.64 2009/02/16 21:19:06 miod Exp $ 52 * $DragonFly$ 53 */ 54 /* 55 * Implement each SATA port as its own SCSI bus on CAM. This way we can 56 * implement future port multiplier features as individual devices on the 57 * bus. 58 * 59 * Much of the cdb<->xa conversion code was taken from OpenBSD, the rest 60 * was written natively for DragonFly. 61 */ 62 63 #include "ahci.h" 64 65 static void ahci_xpt_action(struct cam_sim *sim, union ccb *ccb); 66 static void ahci_xpt_poll(struct cam_sim *sim); 67 static void ahci_xpt_scsi_disk_io(struct ahci_port *ap, 68 struct ata_port *at, union ccb *ccb); 69 static void ahci_xpt_scsi_atapi_io(struct ahci_port *ap, 70 struct ata_port *at, union ccb *ccb); 71 static void ahci_xpt_page_inquiry(struct ahci_port *ap, 72 struct ata_port *at, union ccb *ccb); 73 74 static void ahci_ata_complete_disk_rw(struct ata_xfer *xa); 75 static void ahci_ata_complete_disk_synchronize_cache(struct ata_xfer *xa); 76 static void ahci_atapi_complete_cmd(struct ata_xfer *xa); 77 static void ahci_ata_dummy_sense(struct scsi_sense_data *sense_data); 78 static void ahci_ata_atapi_sense(struct ata_fis_d2h *rfis, 79 struct scsi_sense_data *sense_data); 80 81 static int ahci_cam_probe_disk(struct ahci_port *ap, struct ata_port *at); 82 static int ahci_cam_probe_atapi(struct ahci_port *ap, struct ata_port *at); 83 static int ahci_set_xfer(struct ahci_port *ap, struct ata_port *atx); 84 static void ahci_ata_dummy_done(struct ata_xfer *xa); 85 static void ata_fix_identify(struct ata_identify *id); 86 static void ahci_cam_rescan(struct ahci_port *ap); 87 static void ahci_strip_string(const char **basep, int *lenp); 88 89 int 90 ahci_cam_attach(struct ahci_port *ap) 91 { 92 struct cam_devq *devq; 93 struct cam_sim *sim; 94 int error; 95 int unit; 96 97 /* 98 * We want at least one ccb to be available for error processing 99 * so don't let CAM use more then ncmds - 1. 100 */ 101 unit = device_get_unit(ap->ap_sc->sc_dev); 102 if (ap->ap_sc->sc_ncmds > 1) 103 devq = cam_simq_alloc(ap->ap_sc->sc_ncmds - 1); 104 else 105 devq = cam_simq_alloc(ap->ap_sc->sc_ncmds); 106 if (devq == NULL) { 107 return (ENOMEM); 108 } 109 110 /* 111 * Give the devq enough room to run with 32 max_dev_transactions, 112 * but set the overall max tags to 1 until NCQ is negotiated. 113 */ 114 sim = cam_sim_alloc(ahci_xpt_action, ahci_xpt_poll, "ahci", 115 (void *)ap, unit, &ap->ap_sim_lock, 116 32, 1, devq); 117 cam_simq_release(devq); 118 if (sim == NULL) { 119 return (ENOMEM); 120 } 121 ap->ap_sim = sim; 122 ahci_os_unlock_port(ap); 123 lockmgr(&ap->ap_sim_lock, LK_EXCLUSIVE); 124 error = xpt_bus_register(ap->ap_sim, ap->ap_num); 125 lockmgr(&ap->ap_sim_lock, LK_RELEASE); 126 ahci_os_lock_port(ap); 127 if (error != CAM_SUCCESS) { 128 ahci_cam_detach(ap); 129 return (EINVAL); 130 } 131 ap->ap_flags |= AP_F_BUS_REGISTERED; 132 133 if (ap->ap_probe == ATA_PROBE_NEED_IDENT) 134 error = ahci_cam_probe(ap, NULL); 135 else 136 error = 0; 137 if (error) { 138 ahci_cam_detach(ap); 139 return (EIO); 140 } 141 ap->ap_flags |= AP_F_CAM_ATTACHED; 142 143 return(0); 144 } 145 146 /* 147 * The state of the port has changed. 148 * 149 * If at is NULL the physical port has changed state. 150 * If at is non-NULL a particular target behind a PM has changed state. 151 * 152 * If found is -1 the target state must be queued to a non-interrupt context. 153 * (only works with at == NULL). 154 * 155 * If found is 0 the target was removed. 156 * If found is 1 the target was inserted. 157 */ 158 void 159 ahci_cam_changed(struct ahci_port *ap, struct ata_port *atx, int found) 160 { 161 struct cam_path *tmppath; 162 int status; 163 int target; 164 165 target = atx ? atx->at_target : CAM_TARGET_WILDCARD; 166 167 if (ap->ap_sim == NULL) 168 return; 169 if (found == CAM_TARGET_WILDCARD) { 170 status = xpt_create_path(&tmppath, NULL, 171 cam_sim_path(ap->ap_sim), 172 target, CAM_LUN_WILDCARD); 173 if (status != CAM_REQ_CMP) 174 return; 175 ahci_cam_rescan(ap); 176 } else { 177 status = xpt_create_path(&tmppath, NULL, 178 cam_sim_path(ap->ap_sim), 179 target, 180 CAM_LUN_WILDCARD); 181 if (status != CAM_REQ_CMP) 182 return; 183 #if 0 184 /* 185 * This confuses CAM 186 */ 187 if (found) 188 xpt_async(AC_FOUND_DEVICE, tmppath, NULL); 189 else 190 xpt_async(AC_LOST_DEVICE, tmppath, NULL); 191 #endif 192 } 193 xpt_free_path(tmppath); 194 } 195 196 void 197 ahci_cam_detach(struct ahci_port *ap) 198 { 199 int error; 200 201 if ((ap->ap_flags & AP_F_CAM_ATTACHED) == 0) 202 return; 203 lockmgr(&ap->ap_sim_lock, LK_EXCLUSIVE); 204 if (ap->ap_sim) { 205 xpt_freeze_simq(ap->ap_sim, 1); 206 } 207 if (ap->ap_flags & AP_F_BUS_REGISTERED) { 208 error = xpt_bus_deregister(cam_sim_path(ap->ap_sim)); 209 KKASSERT(error == CAM_REQ_CMP); 210 ap->ap_flags &= ~AP_F_BUS_REGISTERED; 211 } 212 if (ap->ap_sim) { 213 cam_sim_free(ap->ap_sim); 214 ap->ap_sim = NULL; 215 } 216 lockmgr(&ap->ap_sim_lock, LK_RELEASE); 217 ap->ap_flags &= ~AP_F_CAM_ATTACHED; 218 } 219 220 /* 221 * Once the AHCI port has been attached we need to probe for a device or 222 * devices on the port and setup various options. 223 * 224 * If at is NULL we are probing the direct-attached device on the port, 225 * which may or may not be a port multiplier. 226 */ 227 int 228 ahci_cam_probe(struct ahci_port *ap, struct ata_port *atx) 229 { 230 struct ata_port *at; 231 struct ata_xfer *xa; 232 u_int64_t capacity; 233 u_int64_t capacity_bytes; 234 int model_len; 235 int firmware_len; 236 int serial_len; 237 int error; 238 int devncqdepth; 239 int i; 240 const char *model_id; 241 const char *firmware_id; 242 const char *serial_id; 243 const char *wcstr; 244 const char *rastr; 245 const char *scstr; 246 const char *type; 247 248 error = EIO; 249 250 /* 251 * Delayed CAM attachment for initial probe, sim may be NULL 252 */ 253 if (ap->ap_sim == NULL) 254 return(0); 255 256 /* 257 * A NULL atx indicates a probe of the directly connected device. 258 * A non-NULL atx indicates a device connected via a port multiplier. 259 * We need to preserve atx for calls to ahci_ata_get_xfer(). 260 * 261 * at is always non-NULL. For directly connected devices we supply 262 * an (at) pointing to target 0. 263 */ 264 if (atx == NULL) { 265 at = ap->ap_ata[0]; /* direct attached - device 0 */ 266 if (ap->ap_type == ATA_PORT_T_PM) { 267 kprintf("%s: Found Port Multiplier\n", 268 ATANAME(ap, atx)); 269 return (0); 270 } 271 at->at_type = ap->ap_type; 272 } else { 273 at = atx; 274 if (atx->at_type == ATA_PORT_T_PM) { 275 kprintf("%s: Bogus device, reducing port count to %d\n", 276 ATANAME(ap, atx), atx->at_target); 277 if (ap->ap_pmcount > atx->at_target) 278 ap->ap_pmcount = atx->at_target; 279 goto err; 280 } 281 } 282 if (ap->ap_type == ATA_PORT_T_NONE) 283 goto err; 284 if (at->at_type == ATA_PORT_T_NONE) 285 goto err; 286 287 /* 288 * Issue identify, saving the result 289 */ 290 xa = ahci_ata_get_xfer(ap, atx); 291 xa->complete = ahci_ata_dummy_done; 292 xa->data = &at->at_identify; 293 xa->datalen = sizeof(at->at_identify); 294 xa->flags = ATA_F_READ | ATA_F_PIO | ATA_F_POLL; 295 xa->fis->flags = ATA_H2D_FLAGS_CMD | at->at_target; 296 297 switch(at->at_type) { 298 case ATA_PORT_T_DISK: 299 xa->fis->command = ATA_C_IDENTIFY; 300 type = "DISK"; 301 break; 302 case ATA_PORT_T_ATAPI: 303 xa->fis->command = ATA_C_ATAPI_IDENTIFY; 304 xa->flags |= ATA_F_AUTOSENSE; 305 type = "ATAPI"; 306 break; 307 default: 308 xa->fis->command = ATA_C_ATAPI_IDENTIFY; 309 type = "UNKNOWN(ATAPI?)"; 310 break; 311 } 312 xa->fis->features = 0; 313 xa->fis->device = 0; 314 xa->timeout = 1000; 315 316 if (ahci_ata_cmd(xa) != ATA_S_COMPLETE) { 317 kprintf("%s: Detected %s device but unable to IDENTIFY\n", 318 ATANAME(ap, atx), type); 319 ahci_ata_put_xfer(xa); 320 goto err; 321 } 322 ahci_ata_put_xfer(xa); 323 324 ata_fix_identify(&at->at_identify); 325 326 /* 327 * Read capacity using SATA probe info. 328 */ 329 if (le16toh(at->at_identify.cmdset83) & 0x0400) { 330 /* LBA48 feature set supported */ 331 capacity = 0; 332 for (i = 3; i >= 0; --i) { 333 capacity <<= 16; 334 capacity += 335 le16toh(at->at_identify.addrsecxt[i]); 336 } 337 } else { 338 capacity = le16toh(at->at_identify.addrsec[1]); 339 capacity <<= 16; 340 capacity += le16toh(at->at_identify.addrsec[0]); 341 } 342 if (capacity == 0) 343 capacity = 1024 * 1024 / 512; 344 at->at_capacity = capacity; 345 if (atx == NULL) 346 ap->ap_probe = ATA_PROBE_GOOD; 347 348 capacity_bytes = capacity * 512; 349 350 /* 351 * Negotiate NCQ, throw away any ata_xfer's beyond the negotiated 352 * number of slots and limit the number of CAM ccb's to one less 353 * so we always have a slot available for recovery. 354 * 355 * NCQ is not used if ap_ncqdepth is 1 or the host controller does 356 * not support it, and in that case the driver can handle extra 357 * ccb's. 358 * 359 * NCQ is currently used only with direct-attached disks. It is 360 * not used with port multipliers or direct-attached ATAPI devices. 361 * 362 * Remember at least one extra CCB needs to be reserved for the 363 * error ccb. 364 */ 365 if ((ap->ap_sc->sc_cap & AHCI_REG_CAP_SNCQ) && 366 ap->ap_type == ATA_PORT_T_DISK && 367 (le16toh(at->at_identify.satacap) & (1 << 8))) { 368 at->at_ncqdepth = (le16toh(at->at_identify.qdepth) & 0x1F) + 1; 369 devncqdepth = at->at_ncqdepth; 370 if (at->at_ncqdepth > ap->ap_sc->sc_ncmds) 371 at->at_ncqdepth = ap->ap_sc->sc_ncmds; 372 if (at->at_ncqdepth > 1) { 373 for (i = 0; i < ap->ap_sc->sc_ncmds; ++i) { 374 xa = ahci_ata_get_xfer(ap, atx); 375 if (xa->tag < at->at_ncqdepth) { 376 xa->state = ATA_S_COMPLETE; 377 ahci_ata_put_xfer(xa); 378 } 379 } 380 if (at->at_ncqdepth >= ap->ap_sc->sc_ncmds) { 381 cam_sim_set_max_tags(ap->ap_sim, 382 at->at_ncqdepth - 1); 383 } 384 } 385 } else { 386 devncqdepth = 0; 387 } 388 389 model_len = sizeof(at->at_identify.model); 390 model_id = at->at_identify.model; 391 ahci_strip_string(&model_id, &model_len); 392 393 firmware_len = sizeof(at->at_identify.firmware); 394 firmware_id = at->at_identify.firmware; 395 ahci_strip_string(&firmware_id, &firmware_len); 396 397 serial_len = sizeof(at->at_identify.serial); 398 serial_id = at->at_identify.serial; 399 ahci_strip_string(&serial_id, &serial_len); 400 401 /* 402 * Generate informatiive strings. 403 * 404 * NOTE: We do not automatically set write caching, lookahead, 405 * or the security state for ATAPI devices. 406 */ 407 if (at->at_identify.cmdset82 & ATA_IDENTIFY_WRITECACHE) { 408 if (at->at_identify.features85 & ATA_IDENTIFY_WRITECACHE) 409 wcstr = "enabled"; 410 else if (at->at_type == ATA_PORT_T_ATAPI) 411 wcstr = "disabled"; 412 else 413 wcstr = "enabling"; 414 } else { 415 wcstr = "notsupp"; 416 } 417 418 if (at->at_identify.cmdset82 & ATA_IDENTIFY_LOOKAHEAD) { 419 if (at->at_identify.features85 & ATA_IDENTIFY_LOOKAHEAD) 420 rastr = "enabled"; 421 else if (at->at_type == ATA_PORT_T_ATAPI) 422 rastr = "disabled"; 423 else 424 rastr = "enabling"; 425 } else { 426 rastr = "notsupp"; 427 } 428 429 if (at->at_identify.cmdset82 & ATA_IDENTIFY_SECURITY) { 430 if (at->at_identify.securestatus & ATA_SECURE_FROZEN) 431 scstr = "frozen"; 432 else if (at->at_type == ATA_PORT_T_ATAPI) 433 scstr = "unfrozen"; 434 else if (AhciNoFeatures & (1 << ap->ap_num)) 435 scstr = "<disabled>"; 436 else 437 scstr = "freezing"; 438 } else { 439 scstr = "notsupp"; 440 } 441 442 kprintf("%s: Found %s \"%*.*s %*.*s\" serial=\"%*.*s\"\n" 443 "%s: tags=%d/%d satacap=%04x satafea=%04x NCQ=%s " 444 "capacity=%lld.%02dMB\n", 445 446 ATANAME(ap, atx), 447 type, 448 model_len, model_len, model_id, 449 firmware_len, firmware_len, firmware_id, 450 serial_len, serial_len, serial_id, 451 452 ATANAME(ap, atx), 453 devncqdepth, ap->ap_sc->sc_ncmds, 454 at->at_identify.satacap, 455 at->at_identify.satafsup, 456 (at->at_ncqdepth > 1 ? "YES" : "NO"), 457 (long long)capacity_bytes / (1024 * 1024), 458 (int)(capacity_bytes % (1024 * 1024)) * 100 / (1024 * 1024) 459 ); 460 kprintf("%s: f85=%04x f86=%04x f87=%04x WC=%s RA=%s SEC=%s\n", 461 ATANAME(ap, atx), 462 at->at_identify.features85, 463 at->at_identify.features86, 464 at->at_identify.features87, 465 wcstr, 466 rastr, 467 scstr 468 ); 469 470 /* 471 * Additional type-specific probing 472 */ 473 switch(at->at_type) { 474 case ATA_PORT_T_DISK: 475 error = ahci_cam_probe_disk(ap, atx); 476 break; 477 case ATA_PORT_T_ATAPI: 478 error = ahci_cam_probe_atapi(ap, atx); 479 break; 480 default: 481 error = EIO; 482 break; 483 } 484 err: 485 if (error) { 486 at->at_probe = ATA_PROBE_FAILED; 487 if (atx == NULL) 488 ap->ap_probe = at->at_probe; 489 } else { 490 at->at_probe = ATA_PROBE_GOOD; 491 if (atx == NULL) 492 ap->ap_probe = at->at_probe; 493 } 494 return (error); 495 } 496 497 /* 498 * DISK-specific probe after initial ident 499 */ 500 static int 501 ahci_cam_probe_disk(struct ahci_port *ap, struct ata_port *atx) 502 { 503 struct ata_port *at; 504 struct ata_xfer *xa; 505 506 at = atx ? atx : ap->ap_ata[0]; 507 508 /* 509 * Set dummy xfer mode 510 */ 511 ahci_set_xfer(ap, atx); 512 513 /* 514 * Enable write cache if supported 515 * 516 * NOTE: "WD My Book" external disk devices have a very poor 517 * daughter board between the the ESATA and the HD. Sending 518 * any ATA_C_SET_FEATURES commands will break the hardware port 519 * with a fatal protocol error. However, this device also 520 * indicates that WRITECACHE is already on and READAHEAD is 521 * not supported so we avoid the issue. 522 */ 523 if ((at->at_identify.cmdset82 & ATA_IDENTIFY_WRITECACHE) && 524 (at->at_identify.features85 & ATA_IDENTIFY_WRITECACHE) == 0) { 525 xa = ahci_ata_get_xfer(ap, atx); 526 xa->complete = ahci_ata_dummy_done; 527 xa->fis->command = ATA_C_SET_FEATURES; 528 xa->fis->features = ATA_SF_WRITECACHE_EN; 529 /* xa->fis->features = ATA_SF_LOOKAHEAD_EN; */ 530 xa->fis->flags = ATA_H2D_FLAGS_CMD | at->at_target; 531 xa->fis->device = 0; 532 xa->flags = ATA_F_PIO | ATA_F_POLL; 533 xa->timeout = 1000; 534 xa->datalen = 0; 535 if (ahci_ata_cmd(xa) == ATA_S_COMPLETE) 536 at->at_features |= ATA_PORT_F_WCACHE; 537 else 538 kprintf("%s: Unable to enable write-caching\n", 539 ATANAME(ap, atx)); 540 ahci_ata_put_xfer(xa); 541 } 542 543 /* 544 * Enable readahead if supported 545 */ 546 if ((at->at_identify.cmdset82 & ATA_IDENTIFY_LOOKAHEAD) && 547 (at->at_identify.features85 & ATA_IDENTIFY_LOOKAHEAD) == 0) { 548 xa = ahci_ata_get_xfer(ap, atx); 549 xa->complete = ahci_ata_dummy_done; 550 xa->fis->command = ATA_C_SET_FEATURES; 551 xa->fis->features = ATA_SF_LOOKAHEAD_EN; 552 xa->fis->flags = ATA_H2D_FLAGS_CMD | at->at_target; 553 xa->fis->device = 0; 554 xa->flags = ATA_F_PIO | ATA_F_POLL; 555 xa->timeout = 1000; 556 xa->datalen = 0; 557 if (ahci_ata_cmd(xa) == ATA_S_COMPLETE) 558 at->at_features |= ATA_PORT_F_RAHEAD; 559 else 560 kprintf("%s: Unable to enable read-ahead\n", 561 ATANAME(ap, atx)); 562 ahci_ata_put_xfer(xa); 563 } 564 565 /* 566 * FREEZE LOCK the device so malicious users can't lock it on us. 567 * As there is no harm in issuing this to devices that don't 568 * support the security feature set we just send it, and don't bother 569 * checking if the device sends a command abort to tell us it doesn't 570 * support it 571 */ 572 if ((at->at_identify.cmdset82 & ATA_IDENTIFY_SECURITY) && 573 (at->at_identify.securestatus & ATA_SECURE_FROZEN) == 0 && 574 (AhciNoFeatures & (1 << ap->ap_num)) == 0) { 575 xa = ahci_ata_get_xfer(ap, atx); 576 xa->complete = ahci_ata_dummy_done; 577 xa->fis->command = ATA_C_SEC_FREEZE_LOCK; 578 xa->fis->flags = ATA_H2D_FLAGS_CMD | at->at_target; 579 xa->flags = ATA_F_PIO | ATA_F_POLL; 580 xa->timeout = 1000; 581 xa->datalen = 0; 582 if (ahci_ata_cmd(xa) == ATA_S_COMPLETE) 583 at->at_features |= ATA_PORT_F_FRZLCK; 584 else 585 kprintf("%s: Unable to set security freeze\n", 586 ATANAME(ap, atx)); 587 ahci_ata_put_xfer(xa); 588 } 589 590 return (0); 591 } 592 593 /* 594 * ATAPI-specific probe after initial ident 595 */ 596 static int 597 ahci_cam_probe_atapi(struct ahci_port *ap, struct ata_port *atx) 598 { 599 ahci_set_xfer(ap, atx); 600 return(0); 601 } 602 603 /* 604 * Setting the transfer mode is irrelevant for the SATA transport 605 * but some (atapi) devices seem to need it anyway. In addition 606 * if we are running through a SATA->PATA converter for some reason 607 * beyond my comprehension we might have to set the mode. 608 * 609 * We only support DMA modes for SATA attached devices, so don't bother 610 * with legacy modes. 611 */ 612 static int 613 ahci_set_xfer(struct ahci_port *ap, struct ata_port *atx) 614 { 615 struct ata_port *at; 616 struct ata_xfer *xa; 617 u_int16_t mode; 618 u_int16_t mask; 619 620 at = atx ? atx : ap->ap_ata[0]; 621 622 /* 623 * Figure out the supported UDMA mode. Ignore other legacy modes. 624 */ 625 mask = le16toh(at->at_identify.ultradma); 626 if ((mask & 0xFF) == 0 || mask == 0xFFFF) 627 return(0); 628 mask &= 0xFF; 629 mode = 0x4F; 630 while ((mask & 0x8000) == 0) { 631 mask <<= 1; 632 --mode; 633 } 634 635 /* 636 * SATA atapi devices often still report a dma mode, even though 637 * it is irrelevant for SATA transport. It is also possible that 638 * we are running through a SATA->PATA converter and seeing the 639 * PATA dma mode. 640 * 641 * In this case the device may require a (dummy) SETXFER to be 642 * sent before it will work properly. 643 */ 644 xa = ahci_ata_get_xfer(ap, atx); 645 xa->complete = ahci_ata_dummy_done; 646 xa->fis->command = ATA_C_SET_FEATURES; 647 xa->fis->features = ATA_SF_SETXFER; 648 xa->fis->flags = ATA_H2D_FLAGS_CMD | at->at_target; 649 xa->fis->sector_count = mode; 650 xa->flags = ATA_F_PIO | ATA_F_POLL; 651 xa->timeout = 1000; 652 xa->datalen = 0; 653 if (ahci_ata_cmd(xa) != ATA_S_COMPLETE) { 654 kprintf("%s: Unable to set dummy xfer mode \n", 655 ATANAME(ap, atx)); 656 } else if (bootverbose) { 657 kprintf("%s: Set dummy xfer mode to %02x\n", 658 ATANAME(ap, atx), mode); 659 } 660 ahci_ata_put_xfer(xa); 661 return(0); 662 } 663 664 /* 665 * Fix byte ordering so buffers can be accessed as 666 * strings. 667 */ 668 static void 669 ata_fix_identify(struct ata_identify *id) 670 { 671 u_int16_t *swap; 672 int i; 673 674 swap = (u_int16_t *)id->serial; 675 for (i = 0; i < sizeof(id->serial) / sizeof(u_int16_t); i++) 676 swap[i] = bswap16(swap[i]); 677 678 swap = (u_int16_t *)id->firmware; 679 for (i = 0; i < sizeof(id->firmware) / sizeof(u_int16_t); i++) 680 swap[i] = bswap16(swap[i]); 681 682 swap = (u_int16_t *)id->model; 683 for (i = 0; i < sizeof(id->model) / sizeof(u_int16_t); i++) 684 swap[i] = bswap16(swap[i]); 685 } 686 687 /* 688 * Dummy done callback for xa. 689 */ 690 static void 691 ahci_ata_dummy_done(struct ata_xfer *xa) 692 { 693 } 694 695 /* 696 * Use an engineering request to initiate a target scan for devices 697 * behind a port multiplier. 698 * 699 * An asynchronous bus scan is used to avoid reentrancy issues. 700 */ 701 static void 702 ahci_cam_rescan_callback(struct cam_periph *periph, union ccb *ccb) 703 { 704 struct ahci_port *ap = ccb->ccb_h.sim_priv.entries[0].ptr; 705 706 if (ccb->ccb_h.func_code == XPT_SCAN_BUS) { 707 ap->ap_flags &= ~AP_F_SCAN_RUNNING; 708 if (ap->ap_flags & AP_F_SCAN_REQUESTED) { 709 ap->ap_flags &= ~AP_F_SCAN_REQUESTED; 710 ahci_cam_rescan(ap); 711 } 712 ap->ap_flags |= AP_F_SCAN_COMPLETED; 713 wakeup(&ap->ap_flags); 714 } 715 xpt_free_ccb(ccb); 716 } 717 718 static void 719 ahci_cam_rescan(struct ahci_port *ap) 720 { 721 struct cam_path *path; 722 union ccb *ccb; 723 int status; 724 int i; 725 726 if (ap->ap_flags & AP_F_SCAN_RUNNING) { 727 ap->ap_flags |= AP_F_SCAN_REQUESTED; 728 return; 729 } 730 ap->ap_flags |= AP_F_SCAN_RUNNING; 731 for (i = 0; i < AHCI_MAX_PMPORTS; ++i) { 732 ap->ap_ata[i]->at_features |= ATA_PORT_F_RESCAN; 733 } 734 735 status = xpt_create_path(&path, xpt_periph, cam_sim_path(ap->ap_sim), 736 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 737 if (status != CAM_REQ_CMP) 738 return; 739 740 ccb = xpt_alloc_ccb(); 741 xpt_setup_ccb(&ccb->ccb_h, path, 5); /* 5 = low priority */ 742 ccb->ccb_h.func_code = XPT_ENG_EXEC; 743 ccb->ccb_h.cbfcnp = ahci_cam_rescan_callback; 744 ccb->ccb_h.sim_priv.entries[0].ptr = ap; 745 ccb->crcn.flags = CAM_FLAG_NONE; 746 xpt_action_async(ccb); 747 } 748 749 static void 750 ahci_xpt_rescan(struct ahci_port *ap) 751 { 752 struct cam_path *path; 753 union ccb *ccb; 754 int status; 755 756 status = xpt_create_path(&path, xpt_periph, cam_sim_path(ap->ap_sim), 757 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 758 if (status != CAM_REQ_CMP) 759 return; 760 761 ccb = xpt_alloc_ccb(); 762 xpt_setup_ccb(&ccb->ccb_h, path, 5); /* 5 = low priority */ 763 ccb->ccb_h.func_code = XPT_SCAN_BUS; 764 ccb->ccb_h.cbfcnp = ahci_cam_rescan_callback; 765 ccb->ccb_h.sim_priv.entries[0].ptr = ap; 766 ccb->crcn.flags = CAM_FLAG_NONE; 767 xpt_action_async(ccb); 768 } 769 770 /* 771 * Action function - dispatch command 772 */ 773 static 774 void 775 ahci_xpt_action(struct cam_sim *sim, union ccb *ccb) 776 { 777 struct ahci_port *ap; 778 struct ata_port *at, *atx; 779 struct ccb_hdr *ccbh; 780 int unit; 781 782 /* XXX lock */ 783 ap = cam_sim_softc(sim); 784 atx = NULL; 785 KKASSERT(ap != NULL); 786 ccbh = &ccb->ccb_h; 787 unit = cam_sim_unit(sim); 788 789 /* 790 * Early failure checks. These checks do not apply to XPT_PATH_INQ, 791 * otherwise the bus rescan will not remove the dead devices when 792 * unplugging a PM. 793 * 794 * For non-wildcards we have one target (0) and one lun (0), 795 * unless we have a port multiplier. 796 * 797 * A wildcard target indicates only the general bus is being 798 * probed. 799 * 800 * Calculate at and atx. at is always non-NULL. atx is only 801 * non-NULL for direct-attached devices. It will be NULL for 802 * devices behind a port multiplier. 803 * 804 * XXX What do we do with a LUN wildcard? 805 */ 806 if (ccbh->target_id != CAM_TARGET_WILDCARD && 807 ccbh->func_code != XPT_PATH_INQ) { 808 if (ap->ap_type == ATA_PORT_T_NONE) { 809 ccbh->status = CAM_DEV_NOT_THERE; 810 xpt_done(ccb); 811 return; 812 } 813 if (ccbh->target_id < 0 || ccbh->target_id >= ap->ap_pmcount) { 814 ccbh->status = CAM_DEV_NOT_THERE; 815 xpt_done(ccb); 816 return; 817 } 818 at = ap->ap_ata[ccbh->target_id]; 819 if (ap->ap_type == ATA_PORT_T_PM) 820 atx = at; 821 822 if (ccbh->target_lun != CAM_LUN_WILDCARD && ccbh->target_lun) { 823 ccbh->status = CAM_DEV_NOT_THERE; 824 xpt_done(ccb); 825 return; 826 } 827 } else { 828 at = ap->ap_ata[0]; 829 } 830 831 /* 832 * Switch on the meta XPT command 833 */ 834 switch(ccbh->func_code) { 835 case XPT_ENG_EXEC: 836 /* 837 * This routine is called after a port multiplier has been 838 * probed. 839 */ 840 ccbh->status = CAM_REQ_CMP; 841 ahci_os_lock_port(ap); 842 ahci_port_state_machine(ap, 0); 843 ahci_os_unlock_port(ap); 844 xpt_done(ccb); 845 ahci_xpt_rescan(ap); 846 break; 847 case XPT_PATH_INQ: 848 /* 849 * This command always succeeds, otherwise the bus scan 850 * will not detach dead devices. 851 */ 852 ccb->cpi.version_num = 1; 853 ccb->cpi.hba_inquiry = 0; 854 ccb->cpi.target_sprt = 0; 855 ccb->cpi.hba_misc = PIM_SEQSCAN; 856 ccb->cpi.hba_eng_cnt = 0; 857 bzero(ccb->cpi.vuhba_flags, sizeof(ccb->cpi.vuhba_flags)); 858 ccb->cpi.max_target = AHCI_MAX_PMPORTS - 1; 859 ccb->cpi.max_lun = 0; 860 ccb->cpi.async_flags = 0; 861 ccb->cpi.hpath_id = 0; 862 ccb->cpi.initiator_id = AHCI_MAX_PMPORTS - 1; 863 ccb->cpi.unit_number = cam_sim_unit(sim); 864 ccb->cpi.bus_id = cam_sim_bus(sim); 865 ccb->cpi.base_transfer_speed = 150000; 866 ccb->cpi.transport = XPORT_SATA; 867 ccb->cpi.transport_version = 1; 868 ccb->cpi.protocol = PROTO_SCSI; 869 ccb->cpi.protocol_version = SCSI_REV_2; 870 871 ccbh->status = CAM_REQ_CMP; 872 if (ccbh->target_id == CAM_TARGET_WILDCARD) { 873 ahci_os_lock_port(ap); 874 ahci_port_state_machine(ap, 0); 875 ahci_os_unlock_port(ap); 876 } else { 877 switch(ahci_pread(ap, AHCI_PREG_SSTS) & 878 AHCI_PREG_SSTS_SPD) { 879 case AHCI_PREG_SSTS_SPD_GEN1: 880 ccb->cpi.base_transfer_speed = 150000; 881 break; 882 case AHCI_PREG_SSTS_SPD_GEN2: 883 ccb->cpi.base_transfer_speed = 300000; 884 break; 885 case AHCI_PREG_SSTS_SPD_GEN3: 886 ccb->cpi.base_transfer_speed = 600000; 887 break; 888 default: 889 /* unknown */ 890 ccb->cpi.base_transfer_speed = 1000; 891 break; 892 } 893 #if 0 894 if (ap->ap_type == ATA_PORT_T_NONE) 895 ccbh->status = CAM_DEV_NOT_THERE; 896 #endif 897 } 898 xpt_done(ccb); 899 break; 900 case XPT_RESET_DEV: 901 ahci_os_lock_port(ap); 902 if (ap->ap_type == ATA_PORT_T_NONE) { 903 ccbh->status = CAM_DEV_NOT_THERE; 904 } else { 905 ahci_port_reset(ap, atx, 0); 906 ccbh->status = CAM_REQ_CMP; 907 } 908 ahci_os_unlock_port(ap); 909 xpt_done(ccb); 910 break; 911 case XPT_RESET_BUS: 912 ahci_os_lock_port(ap); 913 ahci_port_reset(ap, NULL, 1); 914 ahci_os_unlock_port(ap); 915 ccbh->status = CAM_REQ_CMP; 916 xpt_done(ccb); 917 break; 918 case XPT_SET_TRAN_SETTINGS: 919 ccbh->status = CAM_FUNC_NOTAVAIL; 920 xpt_done(ccb); 921 break; 922 case XPT_GET_TRAN_SETTINGS: 923 ccb->cts.protocol = PROTO_SCSI; 924 ccb->cts.protocol_version = SCSI_REV_2; 925 ccb->cts.transport = XPORT_SATA; 926 ccb->cts.transport_version = XPORT_VERSION_UNSPECIFIED; 927 ccb->cts.proto_specific.valid = 0; 928 ccb->cts.xport_specific.valid = 0; 929 ccbh->status = CAM_REQ_CMP; 930 xpt_done(ccb); 931 break; 932 case XPT_CALC_GEOMETRY: 933 cam_calc_geometry(&ccb->ccg, 1); 934 xpt_done(ccb); 935 break; 936 case XPT_SCSI_IO: 937 /* 938 * Our parallel startup code might have only probed through 939 * to the IDENT, so do the last step if necessary. 940 */ 941 if (at->at_probe == ATA_PROBE_NEED_IDENT) 942 ahci_cam_probe(ap, atx); 943 if (at->at_probe != ATA_PROBE_GOOD) { 944 ccbh->status = CAM_DEV_NOT_THERE; 945 xpt_done(ccb); 946 break; 947 } 948 switch(at->at_type) { 949 case ATA_PORT_T_DISK: 950 ahci_xpt_scsi_disk_io(ap, atx, ccb); 951 break; 952 case ATA_PORT_T_ATAPI: 953 ahci_xpt_scsi_atapi_io(ap, atx, ccb); 954 break; 955 default: 956 ccbh->status = CAM_REQ_INVALID; 957 xpt_done(ccb); 958 break; 959 } 960 break; 961 case XPT_TRIM: 962 { 963 scsi_cdb_t cdb; 964 struct ccb_scsiio *csio; 965 csio = &ccb->csio; 966 cdb = (void *)((ccbh->flags & CAM_CDB_POINTER) ? 967 csio->cdb_io.cdb_ptr : csio->cdb_io.cdb_bytes); 968 cdb->generic.opcode = TRIM; 969 ahci_xpt_scsi_disk_io(ap, atx, ccb); 970 break; 971 } 972 default: 973 ccbh->status = CAM_REQ_INVALID; 974 xpt_done(ccb); 975 break; 976 } 977 } 978 979 /* 980 * Poll function. 981 * 982 * Generally this function gets called heavily when interrupts might be 983 * non-operational, during a halt/reboot or panic. 984 */ 985 static 986 void 987 ahci_xpt_poll(struct cam_sim *sim) 988 { 989 struct ahci_port *ap; 990 991 ap = cam_sim_softc(sim); 992 crit_enter(); 993 ahci_os_lock_port(ap); 994 ahci_port_intr(ap, 1); 995 ahci_os_unlock_port(ap); 996 crit_exit(); 997 } 998 999 /* 1000 * Convert the SCSI command in ccb to an ata_xfer command in xa 1001 * for ATA_PORT_T_DISK operations. Set the completion function 1002 * to convert the response back, then dispatch to the OpenBSD AHCI 1003 * layer. 1004 * 1005 * AHCI DISK commands only support a limited command set, and we 1006 * fake additional commands to make it play nice with the CAM subsystem. 1007 */ 1008 static 1009 void 1010 ahci_xpt_scsi_disk_io(struct ahci_port *ap, struct ata_port *atx, 1011 union ccb *ccb) 1012 { 1013 struct ccb_hdr *ccbh; 1014 struct ccb_scsiio *csio; 1015 struct ata_xfer *xa; 1016 struct ata_port *at; 1017 struct ata_fis_h2d *fis; 1018 struct ata_pass_12 *atp12; 1019 struct ata_pass_16 *atp16; 1020 scsi_cdb_t cdb; 1021 union scsi_data *rdata; 1022 int rdata_len; 1023 u_int64_t capacity; 1024 u_int64_t lba; 1025 u_int32_t count; 1026 1027 ccbh = &ccb->csio.ccb_h; 1028 csio = &ccb->csio; 1029 at = atx ? atx : ap->ap_ata[0]; 1030 1031 /* 1032 * XXX not passing NULL at for direct attach! 1033 */ 1034 xa = ahci_ata_get_xfer(ap, atx); 1035 rdata = (void *)csio->data_ptr; 1036 rdata_len = csio->dxfer_len; 1037 1038 /* 1039 * Build the FIS or process the csio to completion. 1040 */ 1041 cdb = (void *)((ccbh->flags & CAM_CDB_POINTER) ? 1042 csio->cdb_io.cdb_ptr : csio->cdb_io.cdb_bytes); 1043 1044 switch(cdb->generic.opcode) { 1045 case REQUEST_SENSE: 1046 /* 1047 * Auto-sense everything, so explicit sense requests 1048 * return no-sense. 1049 */ 1050 ccbh->status = CAM_SCSI_STATUS_ERROR; 1051 break; 1052 case INQUIRY: 1053 /* 1054 * Inquiry supported features 1055 * 1056 * [opcode, byte2, page_code, length, control] 1057 */ 1058 if (cdb->inquiry.byte2 & SI_EVPD) { 1059 ahci_xpt_page_inquiry(ap, at, ccb); 1060 } else { 1061 bzero(rdata, rdata_len); 1062 if (rdata_len < SHORT_INQUIRY_LENGTH) { 1063 ccbh->status = CAM_CCB_LEN_ERR; 1064 break; 1065 } 1066 if (rdata_len > sizeof(rdata->inquiry_data)) 1067 rdata_len = sizeof(rdata->inquiry_data); 1068 rdata->inquiry_data.device = T_DIRECT; 1069 rdata->inquiry_data.version = SCSI_REV_SPC2; 1070 rdata->inquiry_data.response_format = 2; 1071 rdata->inquiry_data.additional_length = 32; 1072 bcopy("SATA ", rdata->inquiry_data.vendor, 8); 1073 bcopy(at->at_identify.model, 1074 rdata->inquiry_data.product, 1075 sizeof(rdata->inquiry_data.product)); 1076 bcopy(at->at_identify.firmware, 1077 rdata->inquiry_data.revision, 1078 sizeof(rdata->inquiry_data.revision)); 1079 ccbh->status = CAM_REQ_CMP; 1080 } 1081 1082 /* 1083 * Use the vendor specific area to set the TRIM status 1084 * for scsi_da 1085 */ 1086 if (at->at_identify.support_dsm) { 1087 rdata->inquiry_data.vendor_specific1[0] = 1088 at->at_identify.support_dsm &ATA_SUPPORT_DSM_TRIM; 1089 rdata->inquiry_data.vendor_specific1[1] = 1090 at->at_identify.max_dsm_blocks; 1091 } 1092 break; 1093 case READ_CAPACITY_16: 1094 if (cdb->read_capacity_16.service_action != SRC16_SERVICE_ACTION) { 1095 ccbh->status = CAM_REQ_INVALID; 1096 break; 1097 } 1098 if (rdata_len < sizeof(rdata->read_capacity_data_16)) { 1099 ccbh->status = CAM_CCB_LEN_ERR; 1100 break; 1101 } 1102 /* fall through */ 1103 case READ_CAPACITY: 1104 if (rdata_len < sizeof(rdata->read_capacity_data)) { 1105 ccbh->status = CAM_CCB_LEN_ERR; 1106 break; 1107 } 1108 1109 capacity = at->at_capacity; 1110 1111 bzero(rdata, rdata_len); 1112 if (cdb->generic.opcode == READ_CAPACITY) { 1113 rdata_len = sizeof(rdata->read_capacity_data); 1114 if (capacity > 0xFFFFFFFFU) 1115 capacity = 0xFFFFFFFFU; 1116 bzero(&rdata->read_capacity_data, rdata_len); 1117 scsi_ulto4b((u_int32_t)capacity - 1, 1118 rdata->read_capacity_data.addr); 1119 scsi_ulto4b(512, rdata->read_capacity_data.length); 1120 } else { 1121 rdata_len = sizeof(rdata->read_capacity_data_16); 1122 bzero(&rdata->read_capacity_data_16, rdata_len); 1123 scsi_u64to8b(capacity - 1, 1124 rdata->read_capacity_data_16.addr); 1125 scsi_ulto4b(512, rdata->read_capacity_data_16.length); 1126 } 1127 ccbh->status = CAM_REQ_CMP; 1128 break; 1129 case SYNCHRONIZE_CACHE: 1130 /* 1131 * Synchronize cache. Specification says this can take 1132 * greater then 30 seconds so give it at least 45. 1133 */ 1134 fis = xa->fis; 1135 fis->flags = ATA_H2D_FLAGS_CMD; 1136 fis->command = ATA_C_FLUSH_CACHE; 1137 fis->device = 0; 1138 if (xa->timeout < 45000) 1139 xa->timeout = 45000; 1140 xa->datalen = 0; 1141 xa->flags = 0; 1142 xa->complete = ahci_ata_complete_disk_synchronize_cache; 1143 break; 1144 case TRIM: 1145 fis = xa->fis; 1146 fis->command = ATA_C_DATA_SET_MANAGEMENT; 1147 fis->features = (u_int8_t)ATA_SF_DSM_TRIM; 1148 fis->features_exp = (u_int8_t)(ATA_SF_DSM_TRIM>> 8); 1149 1150 xa->flags = ATA_F_WRITE; 1151 fis->flags = ATA_H2D_FLAGS_CMD; 1152 1153 xa->data = csio->data_ptr; 1154 xa->datalen = csio->dxfer_len; 1155 xa->timeout = ccbh->timeout*50; /* milliseconds */ 1156 1157 fis->sector_count =(u_int8_t)(xa->datalen/512); 1158 fis->sector_count_exp =(u_int8_t)((xa->datalen/512)>>8); 1159 1160 lba = 0; 1161 fis->lba_low = (u_int8_t)lba; 1162 fis->lba_mid = (u_int8_t)(lba >> 8); 1163 fis->lba_high = (u_int8_t)(lba >> 16); 1164 fis->lba_low_exp = (u_int8_t)(lba >> 24); 1165 fis->lba_mid_exp = (u_int8_t)(lba >> 32); 1166 fis->lba_high_exp = (u_int8_t)(lba >> 40); 1167 1168 fis->device = ATA_H2D_DEVICE_LBA; 1169 xa->data = csio->data_ptr; 1170 1171 xa->complete = ahci_ata_complete_disk_rw; 1172 ccbh->status = CAM_REQ_INPROG; 1173 break; 1174 case TEST_UNIT_READY: 1175 case START_STOP_UNIT: 1176 case PREVENT_ALLOW: 1177 /* 1178 * Just silently return success 1179 */ 1180 ccbh->status = CAM_REQ_CMP; 1181 rdata_len = 0; 1182 break; 1183 case ATA_PASS_12: 1184 atp12 = &cdb->ata_pass_12; 1185 fis = xa->fis; 1186 /* 1187 * Figure out the flags to be used, depending on the direction of the 1188 * CAM request. 1189 */ 1190 switch (ccbh->flags & CAM_DIR_MASK) { 1191 case CAM_DIR_IN: 1192 xa->flags = ATA_F_READ; 1193 break; 1194 case CAM_DIR_OUT: 1195 xa->flags = ATA_F_WRITE; 1196 break; 1197 default: 1198 xa->flags = 0; 1199 } 1200 xa->flags |= ATA_F_POLL | ATA_F_EXCLUSIVE; 1201 xa->data = csio->data_ptr; 1202 xa->datalen = csio->dxfer_len; 1203 xa->complete = ahci_ata_complete_disk_rw; 1204 xa->timeout = ccbh->timeout; 1205 1206 /* 1207 * Populate the fis from the information we received through CAM 1208 * ATA passthrough. 1209 */ 1210 fis->flags = ATA_H2D_FLAGS_CMD; /* maybe also atp12->flags ? */ 1211 fis->features = atp12->features; 1212 fis->sector_count = atp12->sector_count; 1213 fis->lba_low = atp12->lba_low; 1214 fis->lba_mid = atp12->lba_mid; 1215 fis->lba_high = atp12->lba_high; 1216 fis->device = atp12->device; /* maybe always 0? */ 1217 fis->command = atp12->command; 1218 fis->control = atp12->control; 1219 1220 /* 1221 * Mark as in progress so it is sent to the device. 1222 */ 1223 ccbh->status = CAM_REQ_INPROG; 1224 break; 1225 case ATA_PASS_16: 1226 atp16 = &cdb->ata_pass_16; 1227 fis = xa->fis; 1228 /* 1229 * Figure out the flags to be used, depending on the direction of the 1230 * CAM request. 1231 */ 1232 switch (ccbh->flags & CAM_DIR_MASK) { 1233 case CAM_DIR_IN: 1234 xa->flags = ATA_F_READ; 1235 break; 1236 case CAM_DIR_OUT: 1237 xa->flags = ATA_F_WRITE; 1238 break; 1239 default: 1240 xa->flags = 0; 1241 } 1242 xa->flags |= ATA_F_POLL | ATA_F_EXCLUSIVE; 1243 xa->data = csio->data_ptr; 1244 xa->datalen = csio->dxfer_len; 1245 xa->complete = ahci_ata_complete_disk_rw; 1246 xa->timeout = ccbh->timeout; 1247 1248 /* 1249 * Populate the fis from the information we received through CAM 1250 * ATA passthrough. 1251 */ 1252 fis->flags = ATA_H2D_FLAGS_CMD; /* maybe also atp16->flags ? */ 1253 fis->features = atp16->features; 1254 fis->features_exp = atp16->features_ext; 1255 fis->sector_count = atp16->sector_count; 1256 fis->sector_count_exp = atp16->sector_count_ext; 1257 fis->lba_low = atp16->lba_low; 1258 fis->lba_low_exp = atp16->lba_low_ext; 1259 fis->lba_mid = atp16->lba_mid; 1260 fis->lba_mid_exp = atp16->lba_mid_ext; 1261 fis->lba_high = atp16->lba_high; 1262 fis->lba_mid_exp = atp16->lba_mid_ext; 1263 fis->device = atp16->device; /* maybe always 0? */ 1264 fis->command = atp16->command; 1265 1266 /* 1267 * Mark as in progress so it is sent to the device. 1268 */ 1269 ccbh->status = CAM_REQ_INPROG; 1270 break; 1271 default: 1272 switch(cdb->generic.opcode) { 1273 case READ_6: 1274 lba = scsi_3btoul(cdb->rw_6.addr) & 0x1FFFFF; 1275 count = cdb->rw_6.length ? cdb->rw_6.length : 0x100; 1276 xa->flags = ATA_F_READ; 1277 break; 1278 case READ_10: 1279 lba = scsi_4btoul(cdb->rw_10.addr); 1280 count = scsi_2btoul(cdb->rw_10.length); 1281 xa->flags = ATA_F_READ; 1282 break; 1283 case READ_12: 1284 lba = scsi_4btoul(cdb->rw_12.addr); 1285 count = scsi_4btoul(cdb->rw_12.length); 1286 xa->flags = ATA_F_READ; 1287 break; 1288 case READ_16: 1289 lba = scsi_8btou64(cdb->rw_16.addr); 1290 count = scsi_4btoul(cdb->rw_16.length); 1291 xa->flags = ATA_F_READ; 1292 break; 1293 case WRITE_6: 1294 lba = scsi_3btoul(cdb->rw_6.addr) & 0x1FFFFF; 1295 count = cdb->rw_6.length ? cdb->rw_6.length : 0x100; 1296 xa->flags = ATA_F_WRITE; 1297 break; 1298 case WRITE_10: 1299 lba = scsi_4btoul(cdb->rw_10.addr); 1300 count = scsi_2btoul(cdb->rw_10.length); 1301 xa->flags = ATA_F_WRITE; 1302 break; 1303 case WRITE_12: 1304 lba = scsi_4btoul(cdb->rw_12.addr); 1305 count = scsi_4btoul(cdb->rw_12.length); 1306 xa->flags = ATA_F_WRITE; 1307 break; 1308 case WRITE_16: 1309 lba = scsi_8btou64(cdb->rw_16.addr); 1310 count = scsi_4btoul(cdb->rw_16.length); 1311 xa->flags = ATA_F_WRITE; 1312 break; 1313 default: 1314 ccbh->status = CAM_REQ_INVALID; 1315 break; 1316 } 1317 if (ccbh->status != CAM_REQ_INPROG) 1318 break; 1319 1320 fis = xa->fis; 1321 fis->flags = ATA_H2D_FLAGS_CMD; 1322 fis->lba_low = (u_int8_t)lba; 1323 fis->lba_mid = (u_int8_t)(lba >> 8); 1324 fis->lba_high = (u_int8_t)(lba >> 16); 1325 fis->device = ATA_H2D_DEVICE_LBA; 1326 1327 /* 1328 * NCQ only for direct-attached disks, do not currently 1329 * try to use NCQ with port multipliers. 1330 */ 1331 if (at->at_ncqdepth > 1 && 1332 ap->ap_type == ATA_PORT_T_DISK && 1333 (ap->ap_sc->sc_cap & AHCI_REG_CAP_SNCQ) && 1334 (ccbh->flags & CAM_POLLED) == 0) { 1335 /* 1336 * Use NCQ - always uses 48 bit addressing 1337 */ 1338 xa->flags |= ATA_F_NCQ; 1339 fis->command = (xa->flags & ATA_F_WRITE) ? 1340 ATA_C_WRITE_FPDMA : ATA_C_READ_FPDMA; 1341 fis->lba_low_exp = (u_int8_t)(lba >> 24); 1342 fis->lba_mid_exp = (u_int8_t)(lba >> 32); 1343 fis->lba_high_exp = (u_int8_t)(lba >> 40); 1344 fis->sector_count = xa->tag << 3; 1345 fis->features = (u_int8_t)count; 1346 fis->features_exp = (u_int8_t)(count >> 8); 1347 } else if (count > 0x100 || lba > 0x0FFFFFFFU) { 1348 /* 1349 * Use LBA48 1350 */ 1351 fis->command = (xa->flags & ATA_F_WRITE) ? 1352 ATA_C_WRITEDMA_EXT : ATA_C_READDMA_EXT; 1353 fis->lba_low_exp = (u_int8_t)(lba >> 24); 1354 fis->lba_mid_exp = (u_int8_t)(lba >> 32); 1355 fis->lba_high_exp = (u_int8_t)(lba >> 40); 1356 fis->sector_count = (u_int8_t)count; 1357 fis->sector_count_exp = (u_int8_t)(count >> 8); 1358 } else { 1359 /* 1360 * Use LBA 1361 * 1362 * NOTE: 256 sectors is supported, stored as 0. 1363 */ 1364 fis->command = (xa->flags & ATA_F_WRITE) ? 1365 ATA_C_WRITEDMA : ATA_C_READDMA; 1366 fis->device |= (u_int8_t)(lba >> 24) & 0x0F; 1367 fis->sector_count = (u_int8_t)count; 1368 } 1369 1370 xa->data = csio->data_ptr; 1371 xa->datalen = csio->dxfer_len; 1372 xa->complete = ahci_ata_complete_disk_rw; 1373 xa->timeout = ccbh->timeout; /* milliseconds */ 1374 #if 0 1375 if (xa->timeout > 10000) /* XXX - debug */ 1376 xa->timeout = 10000; 1377 #endif 1378 if (ccbh->flags & CAM_POLLED) 1379 xa->flags |= ATA_F_POLL; 1380 break; 1381 } 1382 1383 /* 1384 * If the request is still in progress the xa and FIS have 1385 * been set up (except for the PM target), and must be dispatched. 1386 * Otherwise the request was completed. 1387 */ 1388 if (ccbh->status == CAM_REQ_INPROG) { 1389 KKASSERT(xa->complete != NULL); 1390 xa->atascsi_private = ccb; 1391 ccb->ccb_h.sim_priv.entries[0].ptr = ap; 1392 ahci_os_lock_port(ap); 1393 xa->fis->flags |= at->at_target; 1394 ahci_ata_cmd(xa); 1395 ahci_os_unlock_port(ap); 1396 } else { 1397 ahci_ata_put_xfer(xa); 1398 xpt_done(ccb); 1399 } 1400 } 1401 1402 /* 1403 * Convert the SCSI command in ccb to an ata_xfer command in xa 1404 * for ATA_PORT_T_ATAPI operations. Set the completion function 1405 * to convert the response back, then dispatch to the OpenBSD AHCI 1406 * layer. 1407 */ 1408 static 1409 void 1410 ahci_xpt_scsi_atapi_io(struct ahci_port *ap, struct ata_port *atx, 1411 union ccb *ccb) 1412 { 1413 struct ccb_hdr *ccbh; 1414 struct ccb_scsiio *csio; 1415 struct ata_xfer *xa; 1416 struct ata_fis_h2d *fis; 1417 scsi_cdb_t cdbs; 1418 scsi_cdb_t cdbd; 1419 int flags; 1420 struct ata_port *at; 1421 1422 ccbh = &ccb->csio.ccb_h; 1423 csio = &ccb->csio; 1424 at = atx ? atx : ap->ap_ata[0]; 1425 1426 switch (ccbh->flags & CAM_DIR_MASK) { 1427 case CAM_DIR_IN: 1428 flags = ATA_F_PACKET | ATA_F_READ; 1429 break; 1430 case CAM_DIR_OUT: 1431 flags = ATA_F_PACKET | ATA_F_WRITE; 1432 break; 1433 case CAM_DIR_NONE: 1434 flags = ATA_F_PACKET; 1435 break; 1436 default: 1437 ccbh->status = CAM_REQ_INVALID; 1438 xpt_done(ccb); 1439 return; 1440 /* NOT REACHED */ 1441 } 1442 1443 /* 1444 * Special handling to get the rfis back into host memory while 1445 * still allowing the chip to run commands in parallel to 1446 * ATAPI devices behind a PM. 1447 */ 1448 flags |= ATA_F_AUTOSENSE; 1449 1450 /* 1451 * The command has to fit in the packet command buffer. 1452 */ 1453 if (csio->cdb_len < 6 || csio->cdb_len > 16) { 1454 ccbh->status = CAM_CCB_LEN_ERR; 1455 xpt_done(ccb); 1456 return; 1457 } 1458 1459 /* 1460 * Initialize the XA and FIS. It is unclear how much of 1461 * this has to mimic the equivalent ATA command. 1462 * 1463 * XXX not passing NULL at for direct attach! 1464 */ 1465 xa = ahci_ata_get_xfer(ap, atx); 1466 fis = xa->fis; 1467 1468 fis->flags = ATA_H2D_FLAGS_CMD | at->at_target; 1469 fis->command = ATA_C_PACKET; 1470 fis->device = ATA_H2D_DEVICE_LBA; 1471 fis->sector_count = xa->tag << 3; 1472 if (flags & (ATA_F_READ | ATA_F_WRITE)) { 1473 if (flags & ATA_F_WRITE) { 1474 fis->features = ATA_H2D_FEATURES_DMA | 1475 ATA_H2D_FEATURES_DIR_WRITE; 1476 } else { 1477 fis->features = ATA_H2D_FEATURES_DMA | 1478 ATA_H2D_FEATURES_DIR_READ; 1479 } 1480 } else { 1481 fis->lba_mid = 0; 1482 fis->lba_high = 0; 1483 } 1484 fis->control = ATA_FIS_CONTROL_4BIT; 1485 1486 xa->flags = flags; 1487 xa->data = csio->data_ptr; 1488 xa->datalen = csio->dxfer_len; 1489 xa->timeout = ccbh->timeout; /* milliseconds */ 1490 1491 if (ccbh->flags & CAM_POLLED) 1492 xa->flags |= ATA_F_POLL; 1493 1494 /* 1495 * Copy the cdb to the packetcmd buffer in the FIS using a 1496 * convenient pointer in the xa. 1497 * 1498 * Zero-out any trailing bytes in case the ATAPI device cares. 1499 */ 1500 cdbs = (void *)((ccbh->flags & CAM_CDB_POINTER) ? 1501 csio->cdb_io.cdb_ptr : csio->cdb_io.cdb_bytes); 1502 bcopy(cdbs, xa->packetcmd, csio->cdb_len); 1503 if (csio->cdb_len < 16) 1504 bzero(xa->packetcmd + csio->cdb_len, 16 - csio->cdb_len); 1505 1506 #if 0 1507 kprintf("opcode %d cdb_len %d dxfer_len %d\n", 1508 cdbs->generic.opcode, 1509 csio->cdb_len, csio->dxfer_len); 1510 #endif 1511 1512 /* 1513 * Some ATAPI commands do not actually follow the SCSI standard. 1514 */ 1515 cdbd = (void *)xa->packetcmd; 1516 1517 switch(cdbd->generic.opcode) { 1518 case REQUEST_SENSE: 1519 /* 1520 * Force SENSE requests to the ATAPI sense length. 1521 * 1522 * It is unclear if this is needed or not. 1523 */ 1524 if (cdbd->sense.length == SSD_FULL_SIZE) { 1525 if (bootverbose) { 1526 kprintf("%s: Shortening sense request\n", 1527 PORTNAME(ap)); 1528 } 1529 cdbd->sense.length = offsetof(struct scsi_sense_data, 1530 extra_bytes[0]); 1531 } 1532 break; 1533 case INQUIRY: 1534 /* 1535 * Some ATAPI devices can't handle long inquiry lengths, 1536 * don't ask me why. Truncate the inquiry length. 1537 */ 1538 if (cdbd->inquiry.page_code == 0 && 1539 cdbd->inquiry.length > SHORT_INQUIRY_LENGTH) { 1540 cdbd->inquiry.length = SHORT_INQUIRY_LENGTH; 1541 } 1542 break; 1543 case READ_6: 1544 case WRITE_6: 1545 /* 1546 * Convert *_6 to *_10 commands. Most ATAPI devices 1547 * cannot handle the SCSI READ_6 and WRITE_6 commands. 1548 */ 1549 cdbd->rw_10.opcode |= 0x20; 1550 cdbd->rw_10.byte2 = 0; 1551 cdbd->rw_10.addr[0] = cdbs->rw_6.addr[0] & 0x1F; 1552 cdbd->rw_10.addr[1] = cdbs->rw_6.addr[1]; 1553 cdbd->rw_10.addr[2] = cdbs->rw_6.addr[2]; 1554 cdbd->rw_10.addr[3] = 0; 1555 cdbd->rw_10.reserved = 0; 1556 cdbd->rw_10.length[0] = 0; 1557 cdbd->rw_10.length[1] = cdbs->rw_6.length; 1558 cdbd->rw_10.control = cdbs->rw_6.control; 1559 break; 1560 default: 1561 break; 1562 } 1563 1564 /* 1565 * And dispatch 1566 */ 1567 xa->complete = ahci_atapi_complete_cmd; 1568 xa->atascsi_private = ccb; 1569 ccb->ccb_h.sim_priv.entries[0].ptr = ap; 1570 ahci_os_lock_port(ap); 1571 ahci_ata_cmd(xa); 1572 ahci_os_unlock_port(ap); 1573 } 1574 1575 /* 1576 * Simulate page inquiries for disk attachments. 1577 */ 1578 static 1579 void 1580 ahci_xpt_page_inquiry(struct ahci_port *ap, struct ata_port *at, union ccb *ccb) 1581 { 1582 union { 1583 struct scsi_vpd_supported_page_list list; 1584 struct scsi_vpd_unit_serial_number serno; 1585 struct scsi_vpd_unit_devid devid; 1586 char buf[256]; 1587 } *page; 1588 scsi_cdb_t cdb; 1589 int i; 1590 int j; 1591 int len; 1592 1593 page = kmalloc(sizeof(*page), M_DEVBUF, M_WAITOK | M_ZERO); 1594 1595 cdb = (void *)((ccb->ccb_h.flags & CAM_CDB_POINTER) ? 1596 ccb->csio.cdb_io.cdb_ptr : ccb->csio.cdb_io.cdb_bytes); 1597 1598 switch(cdb->inquiry.page_code) { 1599 case SVPD_SUPPORTED_PAGE_LIST: 1600 i = 0; 1601 page->list.device = T_DIRECT; 1602 page->list.page_code = SVPD_SUPPORTED_PAGE_LIST; 1603 page->list.list[i++] = SVPD_SUPPORTED_PAGE_LIST; 1604 page->list.list[i++] = SVPD_UNIT_SERIAL_NUMBER; 1605 page->list.list[i++] = SVPD_UNIT_DEVID; 1606 page->list.length = i; 1607 len = offsetof(struct scsi_vpd_supported_page_list, list[3]); 1608 break; 1609 case SVPD_UNIT_SERIAL_NUMBER: 1610 i = 0; 1611 j = sizeof(at->at_identify.serial); 1612 for (i = 0; i < j && at->at_identify.serial[i] == ' '; ++i) 1613 ; 1614 while (j > i && at->at_identify.serial[j-1] == ' ') 1615 --j; 1616 page->serno.device = T_DIRECT; 1617 page->serno.page_code = SVPD_UNIT_SERIAL_NUMBER; 1618 page->serno.length = j - i; 1619 bcopy(at->at_identify.serial + i, 1620 page->serno.serial_num, j - i); 1621 len = offsetof(struct scsi_vpd_unit_serial_number, 1622 serial_num[j-i]); 1623 break; 1624 case SVPD_UNIT_DEVID: 1625 /* fall through for now */ 1626 default: 1627 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 1628 len = 0; 1629 break; 1630 } 1631 if (ccb->ccb_h.status == CAM_REQ_INPROG) { 1632 if (len <= ccb->csio.dxfer_len) { 1633 ccb->ccb_h.status = CAM_REQ_CMP; 1634 bzero(ccb->csio.data_ptr, ccb->csio.dxfer_len); 1635 bcopy(page, ccb->csio.data_ptr, len); 1636 ccb->csio.resid = ccb->csio.dxfer_len - len; 1637 } else { 1638 ccb->ccb_h.status = CAM_CCB_LEN_ERR; 1639 } 1640 } 1641 kfree(page, M_DEVBUF); 1642 } 1643 1644 /* 1645 * Completion function for ATA_PORT_T_DISK cache synchronization. 1646 */ 1647 static 1648 void 1649 ahci_ata_complete_disk_synchronize_cache(struct ata_xfer *xa) 1650 { 1651 union ccb *ccb = xa->atascsi_private; 1652 struct ccb_hdr *ccbh = &ccb->ccb_h; 1653 struct ahci_port *ap = ccb->ccb_h.sim_priv.entries[0].ptr; 1654 1655 switch(xa->state) { 1656 case ATA_S_COMPLETE: 1657 ccbh->status = CAM_REQ_CMP; 1658 ccb->csio.scsi_status = SCSI_STATUS_OK; 1659 break; 1660 case ATA_S_ERROR: 1661 kprintf("%s: synchronize_cache: error\n", 1662 ATANAME(ap, xa->at)); 1663 ccbh->status = CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID; 1664 ccb->csio.scsi_status = SCSI_STATUS_CHECK_COND; 1665 ahci_ata_dummy_sense(&ccb->csio.sense_data); 1666 break; 1667 case ATA_S_TIMEOUT: 1668 kprintf("%s: synchronize_cache: timeout\n", 1669 ATANAME(ap, xa->at)); 1670 ccbh->status = CAM_CMD_TIMEOUT; 1671 break; 1672 default: 1673 kprintf("%s: synchronize_cache: unknown state %d\n", 1674 ATANAME(ap, xa->at), xa->state); 1675 panic("%s: Unknown state", ATANAME(ap, xa->at)); 1676 ccbh->status = CAM_REQ_CMP_ERR; 1677 break; 1678 } 1679 ahci_ata_put_xfer(xa); 1680 ahci_os_unlock_port(ap); 1681 xpt_done(ccb); 1682 ahci_os_lock_port(ap); 1683 } 1684 1685 /* 1686 * Completion function for ATA_PORT_T_DISK I/O 1687 */ 1688 static 1689 void 1690 ahci_ata_complete_disk_rw(struct ata_xfer *xa) 1691 { 1692 union ccb *ccb = xa->atascsi_private; 1693 struct ccb_hdr *ccbh = &ccb->ccb_h; 1694 struct ahci_port *ap = ccb->ccb_h.sim_priv.entries[0].ptr; 1695 1696 switch(xa->state) { 1697 case ATA_S_COMPLETE: 1698 ccbh->status = CAM_REQ_CMP; 1699 ccb->csio.scsi_status = SCSI_STATUS_OK; 1700 break; 1701 case ATA_S_ERROR: 1702 kprintf("%s: disk_rw: error\n", ATANAME(ap, xa->at)); 1703 ccbh->status = CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID; 1704 ccb->csio.scsi_status = SCSI_STATUS_CHECK_COND; 1705 ahci_ata_dummy_sense(&ccb->csio.sense_data); 1706 break; 1707 case ATA_S_TIMEOUT: 1708 kprintf("%s: disk_rw: timeout\n", ATANAME(ap, xa->at)); 1709 ccbh->status = CAM_CMD_TIMEOUT; 1710 ccb->csio.scsi_status = SCSI_STATUS_CHECK_COND; 1711 ahci_ata_dummy_sense(&ccb->csio.sense_data); 1712 break; 1713 default: 1714 kprintf("%s: disk_rw: unknown state %d\n", 1715 ATANAME(ap, xa->at), xa->state); 1716 panic("%s: Unknown state", ATANAME(ap, xa->at)); 1717 ccbh->status = CAM_REQ_CMP_ERR; 1718 break; 1719 } 1720 ccb->csio.resid = xa->resid; 1721 ahci_ata_put_xfer(xa); 1722 ahci_os_unlock_port(ap); 1723 xpt_done(ccb); 1724 ahci_os_lock_port(ap); 1725 } 1726 1727 /* 1728 * Completion function for ATA_PORT_T_ATAPI I/O 1729 * 1730 * Sense data is returned in the rfis. 1731 */ 1732 static 1733 void 1734 ahci_atapi_complete_cmd(struct ata_xfer *xa) 1735 { 1736 union ccb *ccb = xa->atascsi_private; 1737 struct ccb_hdr *ccbh = &ccb->ccb_h; 1738 struct ahci_port *ap = ccb->ccb_h.sim_priv.entries[0].ptr; 1739 scsi_cdb_t cdb; 1740 1741 cdb = (void *)((ccb->ccb_h.flags & CAM_CDB_POINTER) ? 1742 ccb->csio.cdb_io.cdb_ptr : ccb->csio.cdb_io.cdb_bytes); 1743 1744 switch(xa->state) { 1745 case ATA_S_COMPLETE: 1746 ccbh->status = CAM_REQ_CMP; 1747 ccb->csio.scsi_status = SCSI_STATUS_OK; 1748 break; 1749 case ATA_S_ERROR: 1750 ccbh->status = CAM_SCSI_STATUS_ERROR; 1751 ccb->csio.scsi_status = SCSI_STATUS_CHECK_COND; 1752 ahci_ata_atapi_sense(&xa->rfis, &ccb->csio.sense_data); 1753 break; 1754 case ATA_S_TIMEOUT: 1755 kprintf("%s: cmd %d: timeout\n", 1756 PORTNAME(ap), cdb->generic.opcode); 1757 ccbh->status = CAM_CMD_TIMEOUT; 1758 ccb->csio.scsi_status = SCSI_STATUS_CHECK_COND; 1759 ahci_ata_dummy_sense(&ccb->csio.sense_data); 1760 break; 1761 default: 1762 kprintf("%s: cmd %d: unknown state %d\n", 1763 PORTNAME(ap), cdb->generic.opcode, xa->state); 1764 panic("%s: Unknown state", PORTNAME(ap)); 1765 ccbh->status = CAM_REQ_CMP_ERR; 1766 break; 1767 } 1768 ccb->csio.resid = xa->resid; 1769 ahci_ata_put_xfer(xa); 1770 ahci_os_unlock_port(ap); 1771 xpt_done(ccb); 1772 ahci_os_lock_port(ap); 1773 } 1774 1775 /* 1776 * Construct dummy sense data for errors on DISKs 1777 */ 1778 static 1779 void 1780 ahci_ata_dummy_sense(struct scsi_sense_data *sense_data) 1781 { 1782 sense_data->error_code = SSD_ERRCODE_VALID | SSD_CURRENT_ERROR; 1783 sense_data->segment = 0; 1784 sense_data->flags = SSD_KEY_MEDIUM_ERROR; 1785 sense_data->info[0] = 0; 1786 sense_data->info[1] = 0; 1787 sense_data->info[2] = 0; 1788 sense_data->info[3] = 0; 1789 sense_data->extra_len = 0; 1790 } 1791 1792 /* 1793 * Construct atapi sense data for errors on ATAPI 1794 * 1795 * The ATAPI sense data is stored in the passed rfis and must be converted 1796 * to SCSI sense data. 1797 */ 1798 static 1799 void 1800 ahci_ata_atapi_sense(struct ata_fis_d2h *rfis, 1801 struct scsi_sense_data *sense_data) 1802 { 1803 sense_data->error_code = SSD_ERRCODE_VALID | SSD_CURRENT_ERROR; 1804 sense_data->segment = 0; 1805 sense_data->flags = (rfis->error & 0xF0) >> 4; 1806 if (rfis->error & 0x04) 1807 sense_data->flags |= SSD_KEY_ILLEGAL_REQUEST; 1808 if (rfis->error & 0x02) 1809 sense_data->flags |= SSD_EOM; 1810 if (rfis->error & 0x01) 1811 sense_data->flags |= SSD_ILI; 1812 sense_data->info[0] = 0; 1813 sense_data->info[1] = 0; 1814 sense_data->info[2] = 0; 1815 sense_data->info[3] = 0; 1816 sense_data->extra_len = 0; 1817 } 1818 1819 static 1820 void 1821 ahci_strip_string(const char **basep, int *lenp) 1822 { 1823 const char *base = *basep; 1824 int len = *lenp; 1825 1826 while (len && (*base == 0 || *base == ' ')) { 1827 --len; 1828 ++base; 1829 } 1830 while (len && (base[len-1] == 0 || base[len-1] == ' ')) 1831 --len; 1832 *basep = base; 1833 *lenp = len; 1834 } 1835